Class: Main

Inherits:
Sinatra::Base
  • Object
show all
Includes:
Neo4jBolt
Defined in:
src/ruby/pry.rb,
src/ruby/main.rb,
src/ruby/credentials.rb,
src/ruby/include/gev.rb,
src/ruby/include/otp.rb,
src/ruby/include/sms.rb,
src/ruby/include/aula.rb,
src/ruby/include/file.rb,
src/ruby/include/hack.rb,
src/ruby/include/ical.rb,
src/ruby/include/poll.rb,
src/ruby/include/user.rb,
src/ruby/include/vote.rb,
src/ruby/include/admin.rb,
src/ruby/include/color.rb,
src/ruby/include/event.rb,
src/ruby/include/image.rb,
src/ruby/include/jitsi.rb,
src/ruby/include/login.rb,
src/ruby/include/salzh.rb,
src/ruby/include/stats.rb,
src/ruby/include/tests.rb,
src/ruby/include/theme.rb,
src/ruby/include/cypher.rb,
src/ruby/include/groups.rb,
src/ruby/include/lesson.rb,
src/ruby/include/matrix.rb,
src/ruby/include/tresor.rb,
src/ruby/include/comment.rb,
src/ruby/include/message.rb,
src/ruby/include/monitor.rb,
src/ruby/include/website.rb,
src/ruby/include/ext_user.rb,
src/ruby/include/homework.rb,
src/ruby/include/techpost.rb,
src/ruby/include/bib_login.rb,
src/ruby/include/directory.rb,
src/ruby/include/zeugnisse.rb,
src/ruby/include/tablet_set.rb,
src/ruby/include/test_events.rb,
src/ruby/include/public_event.rb,
src/ruby/include/lehrbuchverein.rb

Constant Summary collapse

MAX_HACK_LEVEL = 
10
NAMES = 
%w(babbage boole catmull cerf chomsky codd dijkstra
engelbart feinler hamilton hamming hejlsberg hopper kay knuth lamport
lovelace minsky ritchie stroustrup thompson torvalds turing wirth zuse)
FRUIT = 
%w(apfel birne tomate kiwi melone ananas kartoffel zitrone orange salat)
SPACE_EVENTS = 
{
    '1957-10-04' => ['4. Oktober 1957', 'Am __DATE__ startete <b>Sputnik 1</b>, der erste künstliche Satellit, in die Umlaufbahn der Erde.'],
    '1957-11-03' => ['3. November 1957', 'Am __DATE__ startete <b>Sputnik 2</b> in die Umlaufbahn der Erde. An Bord befand sich <b>Laika</b>, das erste Tier im Weltraum.'],
    '1959-10-07' => ['7. Oktober 1959', 'Am __DATE__ sendete <b>Luna 3</b> die ersten Bilder von der Rückseite des Mondes.'],
    '1961-04-12' => ['12. April 1961', 'Am __DATE__ flog <b>Juri Gagarin</b> als erster Mensch in den Weltraum.'],
    '1962-12-14' => ['14. Dezember 1962', 'Am __DATE__ sendete <b>Mariner 2</b> erstmals Daten von der Venus zur Erde.'],
    '1963-06-16' => ['16. Juni 1963', 'Am __DATE__ flog <b>Walentina Tereschkowa</b> als erste Frau ins Weltall.'],
    '1965-03-18' => ['18. März 1965', 'Am __DATE__ unternahm <b>Alexei Leonow</b> den ersten Weltraumspaziergang.'],
}
PRIMES = 
%w(2	3	5	7	11	13	17	19	23	29
31	37	41	43	47	53	59	61	67	71
73	79	83	89	97	101	103	107	109	113
127	131	137	139	149	151	157	163	167	173
179	181	191	193	197	199	211	223	227	229
233	239	241	251	257	263	269	271	277	281
283	293	307	311	313	317	331	337	347	349
353	359	367	373	379	383	389	397	401	409
419	421	431	433	439	443	449	457	461	463
467	479	487	491	499	503	509	521	523	541
547	557	563	569	571	577	587	593	599	601
607	613	617	619	631	641	643	647	653	659
661	673	677	683	691	701	709	719	727	733
739	743	751	757	761	769	773	787	797	809
811	821	823	827	829	839	853	857	859	863
877	881	883	887	907	911	919	929	937	941
947	953	967	971	977	983	991	997).map { |x| x.to_i }
MAX_CYPHER_LEVEL = 
10
CYPHER_LANGUAGES = 
%w(Ada Algol awk Bash Basic Cobol dBase Delphi Erlang Fortran
Go Haskell Java Lisp Logo Lua MASM Modula Oberon Pascal Perl PHP
Prolog Ruby Rust Scala Scumm Squeak Swift TeX ZPL)
MONITOR_MESSAGE_PATH = 
'/vplan/message.json'
@@GEN_IMAGE_WIDTHS = 
[2048, 1200, 1024, 768, 512, 384, 256].sort
@@BOOTSTRAP_BREAKPOINTS = 
{
    :lg => 1200,
    :md => 992,
    :sm => 768,
    :xs => 480
}

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.check_zeugnisformular(key) ⇒ Object 



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# File 'src/ruby/include/zeugnisse.rb', line 229

def self.check_zeugnisformular(key)
    unless @@zeugnisse[:formulare][key]
        return ['kein Formular vorhanden!']
    end
    required_tags = []
    wf_count = 0
    FAECHER_FOR_ZEUGNIS[ZEUGNIS_SCHULJAHR][ZEUGNIS_HALBJAHR][key].each do |tag|
        if tag[0] == '$'
            wf_count += 1
            required_tags << "#WF#{wf_count}"
            required_tags << "#WF#{wf_count}_Name"
            # required_tags << "##{tag[1, tag.size - 1]}"
        else
            required_tags << "##{tag}"
        end
        if DETAIL_NOTEN[key].include?(tag)
            required_tags << "##{tag}_AT"
            required_tags << "##{tag}_SL"
        end
    end
    required_tags << '#Zeugnisdatum'
    required_tags << '#Name'
    required_tags << '#Geburtsdatum'
    required_tags << '#Klasse'
    required_tags << '#VT'
    required_tags << '#VT_UE'
    required_tags << '#VS'
    required_tags << '#VS_UE'
    required_tags << '#VSP'
    required_tags << '#Angebote'
    required_tags << '#Bemerkungen'
    required_tags << '#WeitereBemerkungen' if key.include?('sesb')
    optional_tags = []

    optional_tags << '#Vorname'

    missing_tags = Set.new(required_tags) - Set.new(@@zeugnisse[:formulare][key][:tags])
    superfluous_tags = Set.new(@@zeugnisse[:formulare][key][:tags]) - Set.new(required_tags)
    superfluous_tags -= Set.new(optional_tags)
    errors = []
    unless missing_tags.empty?
        errors << "fehlende Markierungen: #{missing_tags.join(', ')}"
    end
    unless superfluous_tags.empty?
        errors << "unbekannte Markierungen: #{superfluous_tags.join(', ')}"
    end
    return nil if errors.empty?
    return errors
end

.collect_data ⇒ Object 



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# File 'src/ruby/main.rb', line 477

def self.collect_data
    @@user_info = {}
    @@login_shortcuts = {}
    @@email_for_matrix_login = {}
    @@shorthands = {}
    @@shorthand_order = []
    @@schueler_for_klasse = {}
    @@faecher = {}
    @@ferien_feiertage = []
    @@tablets = {}
    @@tablet_sets = {}
    @@lehrer_order = []
    @@klassen_order = []
    @@current_email_addresses = []
    @@antikenfahrt_recipients = {}
    @@antikenfahrt_mailing_lists = {}
    @@birthday_entries = {}
    @@server_etag = RandomTag.generate(24)

    @@index_for_klasse = {}
    @@predefined_external_users = {}
    @@bib_summoned_books = {}
    @@bib_unconfirmed_books = {}
    @@bib_summoned_books_last_ts = 0

    if File.exist?('/data/login-shortcuts.txt')
        File.open('/data/login-shortcuts.txt') do |f|
            f.each_line do |line|
                line.strip!
                next if line.empty? || line[0] == '#'
                parts = line.split(' ')
                next if parts.size != 2
                @@login_shortcuts[parts[0]] = parts[1]
            end
        end
    end

    parser = Parser.new()
    parser.parse_faecher do |fach, bezeichnung|
        @@faecher[fach] = bezeichnung
    end
    @@off_days = Set.new()
    parser.parse_ferien_feiertage do |t0, t1, title|
        @@ferien_feiertage << {:from => t0, :to => t1, :title => title}
        day = Date.parse(t0)
        last = Date.parse(t1)
        while day <= last
            @@off_days << day.to_s
            day += 1
        end
    end
    @@tage_infos = []
    parser.parse_tage_infos do |t0, t1, title|
        @@tage_infos << {:from => t0, :to => t1, :title => title}
    end
    begin
        @@config = YAML::load_file('/data/config.yaml')
    rescue
        @@config = {
            :first_day => '2020-06-25',
            :first_school_day => '2020-08-10',
            :last_day => '2021-08-06'
        }
        debug "Can't read /data/config.yaml, using a few default values:"
        debug @@config.to_yaml
    end
    parser.parse_lehrer do |record|
        next unless record[:can_log_in]
        @@user_info[record[:email]] = {
            :teacher => true,
            :shorthand => record[:shorthand],
            :first_name => record[:first_name],
            :last_name => record[:last_name],
            :titel => record[:titel],
            :display_name => record[:display_name],
            :display_name_official => record[:display_name_official],
            :display_last_name => record[:display_last_name],
            :display_last_name_dativ => record[:display_last_name_dativ],
            :email => record[:email],
            :can_log_in => record[:can_log_in],
            :nc_login => record[:nc_login],
            :matrix_login => record[:matrix_login],
            :initial_nc_password => record[:initial_nc_password]
        }
         = record[:matrix_login]
        raise "oops: duplicate matrix / nc login: #{}" if @@email_for_matrix_login.include?()
        @@email_for_matrix_login[] = record[:email]
        @@shorthands[record[:shorthand]] = record[:email]
        @@lehrer_order << record[:email]
    end
    @@klassenleiter = {}
    parser.parse_klassenleiter do |record|
        @@klassenleiter[record[:klasse]] = record[:klassenleiter]
        record[:klassenleiter].each do |shorthand|
            if @@shorthands[shorthand]
                email = @@shorthands[shorthand]
                @@user_info[email][:klassenleitung] ||= []
                @@user_info[email][:klassenleitung] << record[:klasse]
            end
        end
    end
    @@shorthand_order = @@shorthands.keys.sort do |a, b|
        a.downcase <=> b.downcase
    end

    @@lehrer_order.sort!() do |a, b|
        la = @@user_info[a][:shorthand].downcase
        lb = @@user_info[b][:shorthand].downcase
        la = 'zzz' + la if la[0] == '_'
        lb = 'zzz' + lb if lb[0] == '_'
        la <=> lb
    end
    @@klassen_order = KLASSEN_ORDER
    @@klassen_index = {}
    KLASSEN_ORDER.each_with_index do |klasse, i|
        @@klassen_index[klasse] = i
    end
    @@klassen_order.each.with_index { |k, i| @@index_for_klasse[k] = i }
    @@klassen_id = {}
    @@klassen_order.each do |klasse|
        @@klassen_id[klasse] = Digest::SHA2.hexdigest(KLASSEN_ID_SALT + klasse).to_i(16).to_s(36)[0, 16]
    end

    self.fix_stundenzeiten()

    disable_jitsi_for_email = Set.new()
    if File.exist?('/data/schueler/disable-jitsi.txt')
        File.open('/data/schueler/disable-jitsi.txt') do |f|
            f.each_line do |line|
                line.strip!
                next if line.empty?
                disable_jitsi_for_email << line
            end
        end
    end

    parser.parse_schueler do |record|
         = "@#{record[:email].split('@').first.sub(/\.\d+$/, '')}:#{MATRIX_DOMAIN_SHORT}"
        unless KLASSEN_ORDER.include?(record[:klasse])
            raise "Klasse #{record[:klasse]} is included in KLASSEN_ORDER"
        end
        @@user_info[record[:email]] = {
            :teacher => false,
            :first_name => record[:first_name],
            :official_first_name => record[:official_first_name],
            :display_first_name => record[:display_first_name],
            :display_last_name => record[:display_last_name],
            :display_name_official => record[:display_name_official],
            :last_name => record[:last_name],
            :display_name => record[:display_name],
            :email => record[:email],
            :id => record[:id],
            :klasse => record[:klasse],
            :klassenstufe => record[:klasse].to_i,
            :geschlecht => record[:geschlecht],
            :nc_login => record[:email].split('@').first.sub(/\.\d+$/, ''),
            :matrix_login => ,
            :initial_nc_password => record[:initial_nc_password],
            :biber_password => Main.gen_password_for_email(record[:email] + 'biber')[0, 4].downcase,
            :jitsi_disabled => disable_jitsi_for_email.include?(record[:email]),
            :geburtstag => record[:geburtstag]
        }
        raise "oops: duplicate matrix / nc login: #{}" if @@email_for_matrix_login.include?()
        @@email_for_matrix_login[] = record[:email]
        @@schueler_for_klasse[record[:klasse]] ||= []
        @@schueler_for_klasse[record[:klasse]] << record[:email]
        birthday = record[:geburtstag]
        if birthday
            birthday_md = birthday[5, 5]
            @@birthday_entries[birthday_md] ||= []
            @@birthday_entries[birthday_md] << record[:email]
        end
    end
    all_prefixes = {}
    @@user_info.keys.each do |email|
        @@user_info[email][:id] = Digest::SHA2.hexdigest(USER_ID_SALT + email).to_i(16).to_s(36)[0, 16]
        (1..email.size).each do |length|
            prefix = email[0, length]
            all_prefixes[prefix] ||= Set.new()
            all_prefixes[prefix] << email
        end
    end
    @@login_shortcuts.keys.each do |email|
        (1..email.size).each do |length|
            prefix = email[0, length]
            all_prefixes[prefix] ||= Set.new()
            all_prefixes[prefix] << email
        end
    end
    @@user_info.keys.each do |email|
        length = 1
        while all_prefixes[email[0, length]].size > 1
            length += 1
        end
        @@user_info[email][:shortest_prefix] = email[0, length]
    end

    @@tablets_for_school_streaming = Set.new()
    @@tablets_which_are_lehrer_tablets = Set.new()
    parser.parse_tablets do |record|
        if @@tablets.include?(record[:id])
            raise "Ooops: already got this tablet called #{record[:id]}"
        end
        @@tablets[record[:id]] = record
        bg_color = TABLET_COLORS[record[:color]] || TABLET_DEFAULT_COLOR
        rgb = @@renderer.hex_to_rgb(bg_color).map { |x| x / 255.0 }
        gray = rgb[0] * 0.299 + rgb[1] * 0.587 + rgb[2] * 0.114
        @@tablets[record[:id]][:bg_color] = bg_color
        @@tablets[record[:id]][:fg_color] = gray < 0.5 ? '#ffffff' : '#000000'
        if record[:status].index('Klassenstreaming') == 0
            @@tablets[record[:id]][:klassen_stream] = record[:status].sub('Klassenstreaming', '').strip
        end
        if record[:school_streaming]
            @@tablets_for_school_streaming << record[:id]
        end
        if record[:lehrer_modus]
            @@tablets_which_are_lehrer_tablets << record[:id]
        end
    end

    @@tablet_sets = parser.parse_tablet_sets || {}

    ADMIN_USERS.each do |email|
        next unless @@user_info[email]
        @@user_info[email][:admin] = true
    end
    ZEUGNIS_ADMIN_USERS.each do |email|
        next unless @@user_info[email]
        @@user_info[email][:zeugnis_admin] = true
    end
    (CAN_SEE_ALL_TIMETABLES_USERS + ADMIN_USERS).each do |email|
        next unless @@user_info[email]
        @@user_info[email][:can_see_all_timetables] = true
    end
    (CAN_MANAGE_SALZH_USERS + ADMIN_USERS).each do |email|
        next unless @@user_info[email]
        @@user_info[email][:can_manage_salzh] = true
    end
    (CAN_UPLOAD_VPLAN_USERS + ADMIN_USERS).each do |email|
        next unless @@user_info[email]
        @@user_info[email][:can_upload_vplan] = true
    end
    (CAN_UPLOAD_FILES_USERS + ADMIN_USERS).each do |email|
        next unless @@user_info[email]
        @@user_info[email][:can_upload_files] = true
    end
    (CAN_MANAGE_NEWS_USERS + ADMIN_USERS).each do |email|
        next unless @@user_info[email]
        @@user_info[email][:can_manage_news] = true
    end
    (CAN_MANAGE_AGS_USERS + ADMIN_USERS).each do |email|
        next unless @@user_info[email]
        @@user_info[email][:can_manage_ags] = true
    end
    (CAN_MANAGE_MONITORS_USERS + ADMIN_USERS).each do |email|
        next unless @@user_info[email]
        @@user_info[email][:can_manage_monitors] = true
    end
    (CAN_MANAGE_TABLETS_USERS + TECHNIKTEAM + ADMIN_USERS).each do |email|
        next unless @@user_info[email]
        @@user_info[email][:can_manage_tablets] = true
    end
    (CAN_REPORT_TECH_PROBLEMS_USERS + TECHNIKTEAM + ADMIN_USERS).each do |email|
        next unless @@user_info[email]
        @@user_info[email][:can_report_tech_problems] = true
    end
    (TECHNIKTEAM + ADMIN_USERS).each do |email|
        next unless @@user_info[email]
        @@user_info[email][:technikteam] = true
    end
    (CAN_MANAGE_ANTIKENFAHRT_USERS + ADMIN_USERS).each do |email|
        next unless @@user_info[email]
        @@user_info[email][:can_manage_antikenfahrt] = true
    end
    (SV_USERS + TECHNIKTEAM).each do |email|
        next unless @@user_info[email]
        @@user_info[email][:sv] = true
    end

    # add Eltern
    @@predefined_external_users = {:groups => [], :recipients => {}}
    @@klassen_order.each do |klasse|
        next unless @@schueler_for_klasse.include?(klasse)
        @@predefined_external_users[:groups] << "/eltern/#{klasse}"
        @@predefined_external_users[:recipients]["/eltern/#{klasse}"] = {
            :label => "Eltern der Klasse #{self.tr_klasse(klasse)}",
            :entries => @@schueler_for_klasse[klasse].map { |x| 'eltern.' + @@user_info[x][:email] }
        }
        @@schueler_for_klasse[klasse].each do |x|
            eltern_email = 'eltern.' + @@user_info[x][:email]
            @@predefined_external_users[:recipients][eltern_email] = {
                :label => "Eltern von #{@@user_info[x][:display_name]}"
            }
        end
    end

    lesson_key_tr = {}
    lesson_key_tr = self.fix_lesson_key_tr(lesson_key_tr)
    # if DASHBOARD_SERVICE == 'ruby'
    #     debug lesson_key_tr.to_yaml
    # end

    @@lessons, @@vertretungen, @@vplan_timestamp, @@day_messages, @@lesson_key_back_tr, @@original_lesson_key_for_lesson_key = parser.parse_timetable(@@config, lesson_key_tr)
    @@original_fach_for_lesson_key = {}
    @@original_lesson_key_for_lesson_key.each_pair do |k, vl|
        vl.each do |v|
            @@original_fach_for_lesson_key[v] = k
        end
    end
    @@current_lesson_key_order = []
    @@current_lesson_key_info = {}
    if DASHBOARD_SERVICE == 'ruby'
        @@lessons[:lesson_keys].keys.sort do |a, b|
            afach = (a.split('_').first || '').downcase
            bfach = (b.split('_').first || '').downcase
            astufe = a.split('_')[1].to_i
            bstufe = b.split('_')[1].to_i
            afach == bfach ? ((astufe == bstufe) ? (a <=> b) : (astufe <=> bstufe)) : (afach <=> bfach)
        end.each do |lesson_key|
            lesson = @@lessons[:lesson_keys][lesson_key]
            stunden = Set.new()
            ((@@lessons[:timetables][@@lessons[:timetables].keys.sort.last][lesson_key] || {})[:stunden] || {}).each_pair do |dow, h|
                h.each_pair do |stunde, info|
                    stunden << sprintf('%d/%02d', info[:tag], info[:stunde])
                end
            end
            unless stunden.empty?
                @@current_lesson_key_order << lesson_key
                @@current_lesson_key_info[lesson_key] = {}
                @@current_lesson_key_info[lesson_key][:stunden] = stunden.to_a.sort
            end
        end
    end

    # patch lesson_keys in @@lessons and @@vertretungen
    @@lessons, @@vertretungen = parser.parse_timetable(@@config, lesson_key_tr)
    # patch @@faecher
    @@lessons[:lesson_keys].each_pair do |lesson_key, info|
        # STDERR.puts "[#{lesson_key}]"
        unless @@faecher[lesson_key]
            x = lesson_key.split('_').first.split('-').first
            @@faecher[info[:fach]] = @@faecher[x] if @@faecher[x]
        end
    end
    today = Time.now.strftime('%Y-%m-%d')
    today = @@config[:first_school_day] if today < @@config[:first_school_day]
    today = @@config[:last_day] if today > @@config[:last_day]
    today = @@lessons[:start_date_for_date][today]
    timetable_today = @@lessons[:timetables][today]
    pretty_folder_names_for_teacher = {}
    @@lessons[:lesson_keys].keys.each do |lesson_key|
        @@lessons[:lesson_keys][lesson_key][:id] = Digest::SHA2.hexdigest(LESSON_ID_SALT + lesson_key).to_i(16).to_s(36)[0, 16]
        lesson_info = @@lessons[:lesson_keys][lesson_key]
        fach = lesson_info[:fach]
        fach = @@faecher[fach] || fach
        pretty_folder_name = "#{fach.gsub('/', '-')} (#{lesson_info[:klassen].sort.map { |x| tr_klasse(x) }.join(', ')})"
        lesson_info[:lehrer].each do |shorthand|
            pretty_folder_names_for_teacher[shorthand] ||= {}
            pretty_folder_names_for_teacher[shorthand][pretty_folder_name] ||= Set.new()
            pretty_folder_names_for_teacher[shorthand][pretty_folder_name] << lesson_key
        end
        @@lessons[:lesson_keys][lesson_key][:pretty_folder_name] = pretty_folder_name
    end
    # if we have 2x Chemie GK (11) for one teacher, differentiate with A and B
    @@lessons[:lesson_keys].keys.each do |lesson_key|
        lesson_info = @@lessons[:lesson_keys][lesson_key]
        pretty_folder_name = lesson_info[:pretty_folder_name]
        more_than_one = false
        lesson_info[:lehrer].each do |shorthand|
            if ((pretty_folder_names_for_teacher[shorthand] || {})[pretty_folder_name] || Set.new()).size > 1
                (pretty_folder_names_for_teacher[shorthand] || {})[pretty_folder_name].sort.each.with_index do |lesson_key, _|
                    @@lessons[:lesson_keys][lesson_key][:pretty_folder_name] = pretty_folder_name.dup.insert(pretty_folder_name.rindex('('), ('A'.ord + _).chr + ' ')
                end
                pretty_folder_names_for_teacher[shorthand].delete(pretty_folder_name)
            end
        end
    end
    @@lessons_for_klasse = {}
    @@lessons[:lesson_keys].each_pair do |lesson_key, lesson|
        lesson[:klassen].each do |klasse|
            @@lessons_for_klasse[klasse] ||= []
            @@lessons_for_klasse[klasse] << lesson_key
        end
    end
    @@lessons_for_shorthand = {}
    @@lessons[:lesson_keys].each_pair do |lesson_key, lesson|
        lesson[:lehrer].each do |lehrer|
            @@lessons_for_shorthand[lehrer] ||= []
            @@lessons_for_shorthand[lehrer] << lesson_key
        end
    end

    @@klassen_for_shorthand = {}
    @@teachers_for_klasse = {}

    self.fix_lessons_for_shorthand()

    @@lessons_for_shorthand.keys.each do |shorthand|
        @@lessons_for_shorthand[shorthand].sort! do |_a, _b|
            a = @@lessons[:lesson_keys][_a] || {}
            b = @@lessons[:lesson_keys][_b] || {}
            (a[:fach] == b[:fach]) ?
            (((a[:klassen] || []).map { |x| @@klassen_order.index(x) || -1}.min || 0) <=> ((b[:klassen] || []).map { |x| @@klassen_order.index(x) || -1 }.min || 0)) :
            (a[:fach] <=> b[:fach])
        end
    end
    @@lessons[:lesson_keys].each_pair do |lesson_key, lesson|
        next if lesson_key[0, 8] == 'Testung_'
        lesson[:klassen].each do |klasse|
            if @@klassen_order.include?(klasse)
                lesson[:lehrer].each do |lehrer|
                    @@klassen_for_shorthand[lehrer] ||= Set.new()
                    @@klassen_for_shorthand[lehrer] << klasse
                end
            end
        end
    end
    @@klassen_for_shorthand.keys.each do |shorthand|
        @@klassen_for_shorthand[shorthand] = @@klassen_for_shorthand[shorthand].to_a.sort do |a, b|
            @@klassen_order.index(a) <=> @@klassen_order.index(b)
        end
    end
    unless @@lessons[:start_dates].empty?
        @@lessons[:timetables][@@lessons[:start_dates].last].each_pair do |lesson_key, lesson_info|
            lesson = @@lessons[:lesson_keys][lesson_key]
            next if lesson[:fach] == 'Testung'
            lesson[:klassen].each do |klasse|
                @@teachers_for_klasse[klasse] ||= {}
                lesson[:lehrer].each do |lehrer|
                    @@teachers_for_klasse[klasse][lehrer] ||= {}
                    @@teachers_for_klasse[klasse][lehrer][lesson[:fach]] ||= 0
                    lesson_info[:stunden].each_pair do |dow, stunden|
                        stunden.each_pair do |i, stunde|
                            @@teachers_for_klasse[klasse][lehrer][lesson[:fach]] += stunde[:count]
                        end
                    end
                end
            end
        end
    end

    last_start_date = nil
    @@lessons[:start_dates].each do |start_date|
        if last_start_date
            added_lesson_keys = Set.new(@@lessons[:timetables][start_date].keys) - Set.new(@@lessons[:timetables][last_start_date].keys)
            removed_lesson_keys = Set.new(@@lessons[:timetables][last_start_date].keys) - Set.new(@@lessons[:timetables][start_date].keys)
            (added_lesson_keys + removed_lesson_keys).to_a.sort.each do |lesson_key|
            end
        end
        last_start_date = start_date
    end

    kurse_for_schueler, schueler_for_kurs = parser.parse_kurswahl(@@user_info.reject { |x, y| y[:teacher] }, @@lessons, lesson_key_tr, @@original_lesson_key_for_lesson_key, @@shorthands)
    @@kurse_for_schueler = kurse_for_schueler
    wahlpflicht_sus_for_lesson_key = parser.parse_wahlpflichtkurswahl(@@user_info.reject { |x, y| y[:teacher] }, @@lessons, lesson_key_tr, @@schueler_for_klasse)
    sesb_sus = parser.parse_sesb(@@user_info.reject { |x, y| y[:teacher] }, @@schueler_for_klasse)
    sesb_sus.each do |email|
        @@user_info[email][:sesb] = true
    end

    @@materialamt_for_lesson = {}
    rows = $neo4j.neo4j_query(<<~END_OF_QUERY)
        MATCH (u:User)-[r:HAS_AMT {amt: 'material'}]->(l:Lesson)
        RETURN u.email, l.key;
    END_OF_QUERY
    rows.each do |row|
        @@materialamt_for_lesson[row['l.key']] ||= Set.new()
        @@materialamt_for_lesson[row['l.key']] << row['u.email']
    end

    @@lessons_for_user = {}
    @@schueler_for_lesson = {}
    @@schueler_offset_in_lesson = {}
    @@user_info.keys.sort do |a, b|
        (@@user_info[a][:last_name].downcase == @@user_info[b][:last_name].downcase) ?
        (@@user_info[a][:first_name].downcase <=> @@user_info[b][:first_name].downcase) :
        (@@user_info[a][:last_name].downcase <=> @@user_info[b][:last_name].downcase)
    end.each do |email|
        user = @@user_info[email]
        lessons = (user[:teacher] ? @@lessons_for_shorthand[user[:shorthand]] : @@lessons_for_klasse[user[:klasse]]).dup
        unless user[:teacher]
            if ['11', '12'].include?(user[:klasse])
                lessons = (kurse_for_schueler[email] || Set.new()).to_a
            end
        end
        lessons ||= []
        unless user[:teacher]
            lessons.reject! do |lesson_key|
                lesson = @@lessons[:lesson_keys][lesson_key]
                (lesson[:fach] == 'SpoM' && user[:geschlecht] != 'w') ||
                (lesson[:fach] == 'SpoJ' && user[:geschlecht] != 'm')
            end
        end
        lessons += wahlpflicht_sus_for_lesson_key.keys
        lessons.uniq!
        unless user[:teacher]
            lessons.each do |lesson_key|
                if wahlpflicht_sus_for_lesson_key.include?(lesson_key)
                    next unless wahlpflicht_sus_for_lesson_key[lesson_key].include?(email)
                end
                @@schueler_for_lesson[lesson_key] ||= []
                @@schueler_for_lesson[lesson_key] << email
                @@lessons_for_user[email] ||= Set.new()
                @@lessons_for_user[email] << lesson_key
            end
        end
    end
    @@schueler_for_lesson.each_pair do |lesson_key, emails|
        @@schueler_offset_in_lesson[lesson_key] ||= {}
        sorted_emails = emails.sort do |a, b|
            @@user_info[a][:display_name] <=> @@user_info[b][:display_name]
        end
        sorted_emails.each.with_index do |email, i|
            @@schueler_offset_in_lesson[lesson_key][email] = i
        end
    end

    @@schueler_for_teacher = {}
    @@lessons_for_shorthand.each_pair do |shorthand, lesson_keys|
        @@schueler_for_teacher[shorthand] ||= Set.new()
        lesson_keys.each do |lesson_key|
            (@@schueler_for_lesson[lesson_key] || []).each do |email|
                @@schueler_for_teacher[shorthand] << email
            end
        end
    end

    @@pausenaufsichten = parser.parse_pausenaufsichten(@@config)

    @@mailing_lists = {}
    self.update_antikenfahrt_groups()
    self.update_mailing_lists()
    @@current_email_addresses = parser.parse_current_email_addresses()

    @@holiday_dates = Set.new()
    @@ferien_feiertage.each do |entry|
        temp0 = Date.parse(entry[:from])
        temp1 = Date.parse(entry[:to])
        while temp0 <= temp1
            @@holiday_dates << temp0.strftime('%Y-%m-%d')
            temp0 += 1
        end
    end

    @@room_ids = {}
    ROOM_ORDER.each do |room|
        @@room_ids[room] = Digest::SHA2.hexdigest(KLASSEN_ID_SALT + room).to_i(16).to_s(36)[0, 16]
    end
    @@rooms_for_shorthand = {}
    room_order_set = Set.new(ROOM_ORDER)
    undeclared_rooms = Set.new()
    unless timetable_today.nil?
        timetable_today.each_pair do |lesson_key, info|
            info[:stunden].each_pair do |wday, day_info|
                day_info.each_pair do |stunde, lesson_info|
                    lesson_info[:lehrer].each do |shorthand|
                        (lesson_info[:raum] || '').split('/').each do |room|
                            unless (room || '').strip.empty?
                                if room_order_set.include?(room)
                                    @@rooms_for_shorthand[shorthand] ||= Set.new()
                                    @@rooms_for_shorthand[shorthand] << room
                                else
                                    undeclared_rooms << room
                                end
                            end
                        end
                    end
                end
            end
        end
    end
    unless undeclared_rooms.empty?
        debug("Undeclared rooms: #{undeclared_rooms.to_a.sort.join(' ')}")
    end
    @@lesson_keys_with_sus_feedback = {}
    if File.exist?('/data/kurswahl/sus_feedback.yaml')
        @@lesson_keys_with_sus_feedback = YAML::load_file('/data/kurswahl/sus_feedback.yaml')
    end

    if ENV['DASHBOARD_SERVICE'] == 'ruby'
        self.parse_zeugnisformulare()
    end

    if ENV['DASHBOARD_SERVICE'] == 'ruby'
        FileUtils.rm_rf('/internal/debug/')
        FileUtils.mkpath('/internal/debug/')
        Main.class_variables.each do |x|
            File.open(File.join('/internal/debug', "#{x.to_s}.yaml"), 'w') do |f|
                f.write Main.class_variable_get(x).to_yaml
            end
        end
        File::open('/internal/debug/emails.txt', 'w') do |f|
            @@user_info.keys.sort.each do |email|
                f.puts "#{email}"
            end
        end
    end
end

.compile_css ⇒ Object 



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# File 'src/ruby/main.rb', line 1254

def self.compile_css()
    files = [
        '/include/flowbite/flowbite.min.css',
        '/include/bootstrap/bootstrap.min.css',
        '/include/summernote/summernote-bs4.min.css',
        '/include/fork-awesome/fork-awesome.min.css',
        '/include/fullcalendar/main.min.css',
        '/include/bootstrap4-toggle/bootstrap4-toggle.min.css',
        '/include/dropzone/dropzone.min.css',
        '/include/chart.js/Chart.min.css',
        '/styles.css',
        '/cling.css',
        '/include/print.min.css',
        '/include/odometer-theme-default.css',
    ]

    self.compile_files(:css, 'text/css', files)
    FileUtils::rm_rf('/gen/css/')
    FileUtils::mkpath('/gen/css/')
    File.open("/gen/css/compiled-#{@@compiled_files[:css][:sha1]}.css", 'w') do |f|
        f.print(@@compiled_files[:css][:content])
    end
end

.compile_files(key, mimetype, paths) ⇒ Object 



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# File 'src/ruby/main.rb', line 1166

def self.compile_files(key, mimetype, paths)
    @@compiled_files[key] ||= {:timestamp => nil, :content => nil}

    latest_file_timestamp = paths.map do |path|
        File.mtime(File.join('/static', path))
    end.max

    if @@compiled_files[key][:timestamp].nil? || @@compiled_files[key][:timestamp] < latest_file_timestamp
        @@compiled_files[key][:content] = StringIO.open do |io|
            paths.each do |path|
                io.puts File.read(File.join('/static', path))
            end
            io.string
        end
        @@compiled_files[key][:sha1] = Digest::SHA1.hexdigest(@@compiled_files[key][:content])[0, 16]
        @@compiled_files[key][:timestamp] = latest_file_timestamp
    end
end

.compile_js ⇒ Object 



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# File 'src/ruby/main.rb', line 1214

def self.compile_js()
    files = [
        '/include/jquery/jquery-3.6.1.min.js',
        '/include/jquery-ui/jquery-ui.min.js',
        '/include/popper.js/popper.min.js',
        '/include/bootstrap/bootstrap.min.js',
        '/include/fullcalendar/main.min.js',
        '/include/fullcalendar/de.js',
        '/include/pako/pako_inflate.min.js',
        '/include/bootstrap4-toggle/bootstrap4-toggle.min.js',
        '/include/summernote/summernote-bs4.min.js',
        '/include/summernote/summernote-de-DE.min.js',
        '/include/clipboard/clipboard.min.js',
        '/include/moment/moment-with-locales.min.js',
        '/include/dropzone/dropzone.min.js',
        '/include/chart.js/Chart.min.js',
        '/include/jszip/dist/jszip.min.js',
        '/include/flowbite/flowbite.js',
        '/code.js',
        '/include/zxing.min.js',
        '/barcode-widget.js',
        '/sound.js',
        '/include/howler.core.min.js',
        '/sortable-table.js',
        '/include/print.min.js',
        '/include/odometer.min.js',
        '/include/zoom.min.js',
        '/include/turn.min.js',
        '/include/scissor.min.js',
        '/include/hash.js',
    ]

    self.compile_files(:js, 'application/javascript', files)
    FileUtils::rm_rf('/gen/js/')
    FileUtils::mkpath('/gen/js/')
    File.open("/gen/js/compiled-#{@@compiled_files[:js][:sha1]}.js", 'w') do |f|
        f.print(@@compiled_files[:js][:content])
    end
end

.determine_lehrmittelverein_state_for_all ⇒ Object 



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# File 'src/ruby/include/lehrbuchverein.rb', line 2

def self.determine_lehrmittelverein_state_for_all()
    @@lehrmittelverein_state_cache = {}
    @@user_info.each_pair do |email, info|
        @@lehrmittelverein_state_cache[email] = info[:teacher]
    end
    temp = $neo4j.neo4j_query(<<~END_OF_QUERY).map { |x| { :email => x['u.email'] } }
        MATCH (u:User {lmv_no_pay: true})
        RETURN u.email;
    END_OF_QUERY
    temp.each do |row|
        email = row[:email]
        @@lehrmittelverein_state_cache[email] = true
    end
    temp = $neo4j.neo4j_query(<<~END_OF_QUERY, {:jahr => LEHRBUCHVEREIN_JAHR}).map { |x| { :email => x['u.email'] } }
        MATCH (u:User)-[:PAID_FOR]->(j:Lehrbuchvereinsjahr {jahr: $jahr})
        RETURN u.email;
    END_OF_QUERY
    temp.each do |row|
        email = row[:email]
        @@lehrmittelverein_state_cache[email] = true
    end
end

.determine_zeugnislisten ⇒ Object 



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# File 'src/ruby/include/zeugnisse.rb', line 69

def self.determine_zeugnislisten()
    STDERR.puts "ATTENTION determine_zeugnislisten() IS DOING NOTHING RIGHT NOW"
    return
    @@all_zeugnis_faecher = Set.new()
    FAECHER_FOR_ZEUGNIS[ZEUGNIS_SCHULJAHR][ZEUGNIS_HALBJAHR].each_pair do |key, faecher|
        faecher.each do |fach|
            @@all_zeugnis_faecher << fach.sub('$', '')
        end
    end

    @@zeugnisliste_for_klasse = {}
    @@zeugnisliste_for_lehrer = {}

    kurse_for_klasse = Hash[ZEUGNIS_KLASSEN_ORDER.map do |klasse|
        [klasse, (@@lessons_for_klasse[klasse] || []).map { |x| @@lessons[:lesson_keys][x].merge({:lesson_key => x})}]
    end]

    delegates = {}
    delegates_for_klasse = {}
    rows = $neo4j.neo4j_query(<<~END_OF_QUERY, :path => "#{ZEUGNIS_SCHULJAHR}/#{ZEUGNIS_HALBJAHR}/")
        MATCH (n:ZeugnisDelegate)-[:WHO]->(u:User)
        WHERE n.path STARTS WITH $path
        RETURN n.path AS path, u.email AS email;
    END_OF_QUERY
    rows.each do |row|
        delegates[row['path']] ||= Set.new()
        delegates[row['path']] << row['email']
        klasse = row['path'].split('/')[2]
        delegates_for_klasse[klasse] ||= {}
        delegates_for_klasse[klasse][row['path']] ||= Set.new()
        delegates_for_klasse[klasse][row['path']] << row['email']
    end

    if ZEUGNIS_USE_MOCK_NAMES
        srand(42)
    end
    ZEUGNIS_KLASSEN_ORDER.each do |klasse|
        lesson_keys_for_fach = {}
        shorthands_for_fach = {}
        # get teachers from stundenplan
        (kurse_for_klasse[klasse]).each do |kurs|
            next unless @@all_zeugnis_faecher.include?(kurs[:fach])
            lesson_keys_for_fach[kurs[:fach]] ||= []
            lesson_keys_for_fach[kurs[:fach]] << kurs[:lesson_key]
            fach = ZEUGNIS_CONSOLIDATE_FACH[kurs[:fach]] || kurs[:fach]
            shorthands = kurs[:lehrer]
            # check if we have delegate overrides
            path = "#{ZEUGNIS_SCHULJAHR}/#{ZEUGNIS_HALBJAHR}/#{klasse}/#{fach}"
            if delegates[path]
                shorthands = delegates[path].to_a.map { |email| @@user_info[email][:shorthand] }
            end
            shorthands.each do |shorthand|
                shorthands_for_fach[fach] ||= {}
                shorthands_for_fach[fach][shorthand] = true
                @@zeugnisliste_for_lehrer[shorthand] ||= {}
                @@zeugnisliste_for_lehrer[shorthand]["#{klasse}/#{fach}"] = true
                if FAECHER_SPRACHEN.include?(fach)
                    @@zeugnisliste_for_lehrer[shorthand]["#{klasse}/#{fach}_AT"] = true
                    @@zeugnisliste_for_lehrer[shorthand]["#{klasse}/#{fach}_SL"] = true
                end
                ['ZV', 'LLB', 'SSK', 'KF', 'SV'].each do |item|
                    @@zeugnisliste_for_lehrer[shorthand]["#{klasse}/#{item}/#{fach}"] = true
                end
            end
        end
        # get teachers from delegate entries
        (delegates_for_klasse[klasse] || {}).each_pair do |path, emails|
            fach = path.split('/')[3]
            emails.to_a.sort.each do |email|
                shorthand = @@user_info[email][:shorthand]
                shorthands_for_fach[fach] ||= {}
                shorthands_for_fach[fach][shorthand] = true
                @@zeugnisliste_for_lehrer[shorthand] ||= {}
                @@zeugnisliste_for_lehrer[shorthand]["#{klasse}/#{fach}"] = true
                if FAECHER_SPRACHEN.include?(fach)
                    @@zeugnisliste_for_lehrer[shorthand]["#{klasse}/#{fach}_AT"] = true
                    @@zeugnisliste_for_lehrer[shorthand]["#{klasse}/#{fach}_SL"] = true
                end
                ['ZV', 'LLB', 'SSK', 'KF', 'SV'].each do |item|
                    @@zeugnisliste_for_lehrer[shorthand]["#{klasse}/#{item}/#{fach}"] = true
                end
            end

        end
        
        @@zeugnisliste_for_klasse[klasse] = {}
        @@zeugnisliste_for_klasse[klasse][:lehrer_for_fach] = {}
        @@zeugnisliste_for_klasse[klasse][:lehrer_for_fach_is_delegate] = {}
        (@@klassenleiter[klasse] || []).each do |shorthand|
            @@zeugnisliste_for_klasse[klasse][:lehrer_for_fach]['_KL'] ||= []
            @@zeugnisliste_for_klasse[klasse][:lehrer_for_fach]['_KL'] << shorthand
            ['VT', 'VT_UE', 'VS', 'VS_UE', 'VSP'].each do |item|
                @@zeugnisliste_for_lehrer[shorthand] ||= {}
                @@zeugnisliste_for_lehrer[shorthand]["#{klasse}/#{item}"] = true
            end
            ['ZV', 'LLB', 'SSK', 'KF', 'SV'].each do |item|
                @@zeugnisliste_for_lehrer[shorthand] ||= {}
                @@zeugnisliste_for_lehrer[shorthand]["#{klasse}/#{item}/_KL"] = true
            end
        end
        path = "#{ZEUGNIS_SCHULJAHR}/#{ZEUGNIS_HALBJAHR}/#{klasse}/_KL"
        if delegates[path]
            @@zeugnisliste_for_klasse[klasse][:lehrer_for_fach]['_KL'] = []
            @@zeugnisliste_for_klasse[klasse][:lehrer_for_fach_is_delegate]['_KL'] = true
            delegates[path].each do |email|
                shorthand = @@user_info[email][:shorthand]
                @@zeugnisliste_for_klasse[klasse][:lehrer_for_fach]['_KL'] << shorthand
                ['VT', 'VT_UE', 'VS', 'VS_UE', 'VSP'].each do |item|
                    @@zeugnisliste_for_lehrer[shorthand] ||= {}
                    @@zeugnisliste_for_lehrer[shorthand]["#{klasse}/#{item}"] = true
                end
                ['ZV', 'LLB', 'SSK', 'KF', 'SV'].each do |item|
                    @@zeugnisliste_for_lehrer[shorthand] ||= {}
                    @@zeugnisliste_for_lehrer[shorthand]["#{klasse}/#{item}/_KL"] = true
                end
            end
        end
        @@zeugnisliste_for_klasse[klasse][:lehrer_for_fach]['_KL'] ||= []
        @@zeugnisliste_for_klasse[klasse][:lehrer_for_fach]['_KL'].uniq!
        faecher = self.zeugnis_faecher_for_emails(@@schueler_for_klasse[klasse])
        @@zeugnisliste_for_klasse[klasse][:faecher] = faecher.map do |x|
            x[0] == '$' ? x[1, x.size - 1] : x
        end
        @@zeugnisliste_for_klasse[klasse][:faecher].uniq!
        @@zeugnisliste_for_klasse[klasse][:wahlfach] = Hash[faecher.map do |x|
            [x.sub('$', ''), x[0] == '$' ? true : false]
        end]
        @@zeugnisliste_for_klasse[klasse][:faecher].each do |fach|
            @@zeugnisliste_for_klasse[klasse][:lehrer_for_fach][fach] = (shorthands_for_fach[fach] || {}).keys
            path = "#{ZEUGNIS_SCHULJAHR}/#{ZEUGNIS_HALBJAHR}/#{klasse}/#{fach}"
            @@zeugnisliste_for_klasse[klasse][:lehrer_for_fach_is_delegate][fach] = delegates.include?(path)
        end
        @mock = {}
        if ZEUGNIS_USE_MOCK_NAMES
            @mock[:nachnamen] = JSON.parse(File.read('mock/nachnamen.json'))
            @mock[:vornamen] = {
                'm' => JSON.parse(File.read('mock/vornamen-m.json')),
                'w' => JSON.parse(File.read('mock/vornamen-w.json'))
            }
        end

        @@zeugnisliste_for_klasse[klasse][:index_for_schueler] ||= {}
        @@schueler_for_klasse[klasse].each.with_index do |email, index|
            @@zeugnisliste_for_klasse[klasse][:index_for_schueler][email] = index
        end

        @@zeugnisliste_for_klasse[klasse][:schueler] = @@schueler_for_klasse[klasse].map do |email|
            geschlecht = ZEUGNIS_USE_MOCK_NAMES ? ['m', 'w'].sample : @@user_info[email][:geschlecht]
            {
                :email => email,
                :zeugnis_key => self.zeugnis_key_for_email(email),
                :official_first_name => ZEUGNIS_USE_MOCK_NAMES ? @mock[:vornamen][geschlecht].sample : @@user_info[email][:official_first_name],
                :last_name => ZEUGNIS_USE_MOCK_NAMES ? @mock[:nachnamen].sample : @@user_info[email][:last_name],
                :geburtstag => ZEUGNIS_USE_MOCK_NAMES ? sprintf("%04d-%02d-%02d", @@user_info[email][:geburtstag][0, 4].to_i, (1..12).to_a.sample, (1..28).to_a.sample) : @@user_info[email][:geburtstag],
                :geschlecht => geschlecht,
            }
        end
    end
end

.fix_lesson_key_tr(lesson_key_tr) ⇒ Object 



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# File 'src/ruby/credentials.rb', line 395

def self.fix_lesson_key_tr(lesson_key_tr)
    # # Kursawe: Agr 9c => Agr 9c, 9e
    # lesson_key_tr['Agr~741a'] = 'Agr~184a'
    # # Hollmann-Stelzer: Agr 10c => Agr 10c, 10e
    # lesson_key_tr['Agr~207a'] = 'Agr~403a'
    # # Munk: Deutsch GK 11
    # lesson_key_tr['de-G01~497a'] = 'de-G01~474a'
    # # Crome: Deutsch GK 11
    # lesson_key_tr['de3~497a'] = 'de1~477a'
    # # Liebe: Deutsch GK 11
    # lesson_key_tr['de6~497a'] = 'de1~769a'
    # # Kilian: Deutsch GK 12
    # lesson_key_tr['de5~755a'] = 'de1~513a'
    # # AP: Deutsch GK 12
    # lesson_key_tr['de3~755a'] = 'de1~474b'
    # # AP / Ho: Deutsch GK 11
    # lesson_key_tr['de4~497a'] = 'de1~477a'
    # lesson_key_tr['ds-G119~791a'] = 'ds-G119~505a'
    # lesson_key_tr['mo-G46~795a'] = 'mo-G46~786a'
    # # [???] de4~497a Deutsch GK 11 Frau Arias Porras, Frau Hodgkiss 1 Stunde
    # # [???] en1~499a Englisch GK 11 Herr Weging, 6 Stunden
    # lesson_key_tr['de03'] = 'de-G02'
    
    lesson_key_tr
end

.fix_lessons_for_shorthand ⇒ Object 



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# File 'src/ruby/credentials.rb', line 421

def self.fix_lessons_for_shorthand
    # @@lessons_for_shorthand['Led'] ||= []
    # @@lessons_for_shorthand['Led'] << 'Ma~99a'
    # @@lessons_for_shorthand['Sch'] ||= []
    # @@lessons_for_shorthand['Sch'] << 'Ge~353a'
    # @@lessons_for_shorthand['Sch'] << 'GE-L11~474a'
    # @@lessons_for_shorthand['Sch'] << 'evR~331a'
    # @@lessons_for_shorthand['Sch'] << 'evR~709a'
    # @@lessons_for_shorthand['Sch'] << 'evR~399a'
    # @@lessons_for_shorthand['Eb'] ||= []
    # @@lessons_for_shorthand['Eb'] << 'katR~830a'
    # @@lessons_for_shorthand['Wr'] ||= []
    # @@lessons_for_shorthand['Wr'] << 'ch-G35~788a'
    # @@lessons_for_shorthand['Wr'] << 'Ch~115a'
    # @@lessons_for_shorthand['Wr'] << 'Ch~160a'
    # @@lessons_for_shorthand['Wr'] << 'BI-L115~515a'
    # @@lessons_for_shorthand['Wr'] << 'Bio~190a'
    # @@lessons_for_shorthand['Eb'] ||= []
    # @@lessons_for_shorthand['Eb'] << 'Pol~118a'
    # @@lessons_for_shorthand['Rk'] ||= []
    # @@lessons_for_shorthand['Rk'] << 'D~609a'
    # @@lessons_for_shorthand['Rk'] << 'EN-L105-107~513a'
    # @@lessons_for_shorthand['Rk'] << 'En~21a'
    # @@lessons_for_shorthand['Rk'] << 'En~258a'
    # @@lessons_for_shorthand['Rk'] << 'EN-L05-07~529a'
    # @@lessons_for_shorthand['Rk'] << 'En~354a'
    # @@lessons_for_shorthand['Rk'] << 'En~611a'
    # @@lessons_for_shorthand['Rk'] << 'En~196a'
    # @@lessons_for_shorthand['Rk'] << 'en-G109-111~557a'
    # @@lessons_for_shorthand['Rk'] << 'En~48a'
    # @@lessons_for_shorthand['Rk'] << 'En~12a'
    
    # ['5b', '7a', '8a', '9b', '11'].each do |klasse|
    #     @@teachers_for_klasse[klasse] ||= {}
    #     @@teachers_for_klasse[klasse]['Sch'] ||= {}
    #     @@klassen_for_shorthand['Sch'] ||= Set.new()
    #     @@klassen_for_shorthand['Sch'] << klasse
    # end
    # ['7a', '7b', '7c'].each do |klasse|
    #     @@teachers_for_klasse[klasse] ||= {}
    #     @@teachers_for_klasse[klasse]['Eb'] ||= {}
    #     @@klassen_for_shorthand['Eb'] ||= Set.new()
    #     @@klassen_for_shorthand['Eb'] << klasse
    # end
    # ['8a', '9a', '9c', '11', '12'].each do |klasse|
    #     @@teachers_for_klasse[klasse] ||= {}
    #     @@teachers_for_klasse[klasse]['Wr'] ||= {}
    #     @@klassen_for_shorthand['Wr'] ||= Set.new()
    #     @@klassen_for_shorthand['Wr'] << klasse
    # end
    # ['11', '12', '5b', '5c', '6c', '6d', '8a', '9b', '9e'].each do |klasse|
    #     @@teachers_for_klasse[klasse] ||= {}
    #     @@teachers_for_klasse[klasse]['Rk'] ||= {}
    #     @@klassen_for_shorthand['Rk'] ||= Set.new()
    #     @@klassen_for_shorthand['Rk'] << klasse
    # end
    @@klassen_for_shorthand['_Sek'] = KLASSEN_ORDER
end

.fix_parsed_klasse(klasse) ⇒ Object 



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# File 'src/ruby/credentials.rb', line 480

def self.fix_parsed_klasse(klasse)
    d = {'12' => '11', '13' => '12'}
    d[klasse] || klasse
end

.fix_public_event_config ⇒ Object 



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# File 'src/ruby/include/public_event.rb', line 324

def self.fix_public_event_config
    debug "Fixing public event config!"
    @@public_event_config.map! do |entry|
        if entry[:auto_rows]
            rows = []
            entry[:auto_rows].each do |auto_entry|
                row = {}
                day = Date.parse(auto_entry[:day])
                row[:description] = "#{%w(So Mo Di Mi Do Fr Sa)[day.wday]}., #{day.strftime("%d.%m.%Y")}"
                row[:entries] = []
                auto_entry[:spans].each do |span|
                    t = Time.parse("#{auto_entry[:day]}T#{span[0]}")
                    while t <= Time.parse("#{auto_entry[:day]}T#{span[1]}")
                        row[:entries] << {
                            :key => "#{t.strftime("%Y-%m-%dT%H:%M")}",
                            :deadline => entry[:auto_rows_no_signup_deadline] ? "#{(t - entry[:auto_rows_no_signup_deadline] * 3600).strftime("%Y-%m-%dT%H:%M")}" : nil,
                            :description => "#{t.strftime("%H:%M")} Uhr",
                            :capacity => 1,
                        }
                        t += auto_entry[:duration] * 60
                    end
                end
                rows << row
            end
            entry[:rows] = rows
        end
        entry
    end
end

.fix_stundenzeiten ⇒ Object 



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# File 'src/ruby/credentials.rb', line 261

def self.fix_stundenzeiten
    hd = '2020-08-10'
    HOURS_FOR_KLASSE[hd] = {}
    @@klassen_order.each do |klasse|
        klassenstufe = klasse.to_i
        HOURS_FOR_KLASSE[hd][klasse] = []
        if [5, 6].include?(klassenstufe)
            HOURS_FOR_KLASSE[hd][klasse] << ['08:00', '08:45']
            HOURS_FOR_KLASSE[hd][klasse] << ['08:50', '09:40']
            HOURS_FOR_KLASSE[hd][klasse] << ['09:55', '10:35']
            HOURS_FOR_KLASSE[hd][klasse] << ['10:40', '11:25']
            HOURS_FOR_KLASSE[hd][klasse] << ['11:25', '12:10']
            HOURS_FOR_KLASSE[hd][klasse] << ['12:50', '13:35']
            HOURS_FOR_KLASSE[hd][klasse] << ['13:40', '14:25']
            HOURS_FOR_KLASSE[hd][klasse] << ['14:30', '15:15']
            HOURS_FOR_KLASSE[hd][klasse] << ['15:20', '16:05']
            HOURS_FOR_KLASSE[hd][klasse] << ['16:10', '16:55']
            HOURS_FOR_KLASSE[hd][klasse] << ['16:55', '17:40']
        elsif [7, 8, 9, 10].include?(klassenstufe)
            HOURS_FOR_KLASSE[hd][klasse] << ['08:00', '08:45']
            HOURS_FOR_KLASSE[hd][klasse] << ['08:50', '09:35']
            HOURS_FOR_KLASSE[hd][klasse] << ['09:35', '10:20']
            HOURS_FOR_KLASSE[hd][klasse] << ['10:40', '11:25']
            HOURS_FOR_KLASSE[hd][klasse] << ['11:25', '12:10']
            HOURS_FOR_KLASSE[hd][klasse] << ['12:15', '13:00']
            HOURS_FOR_KLASSE[hd][klasse] << ['13:40', '14:25']
            HOURS_FOR_KLASSE[hd][klasse] << ['14:30', '15:15']
            HOURS_FOR_KLASSE[hd][klasse] << ['15:20', '16:05']
            HOURS_FOR_KLASSE[hd][klasse] << ['16:10', '16:55']
            HOURS_FOR_KLASSE[hd][klasse] << ['16:55', '17:40']
        else
            HOURS_FOR_KLASSE[hd][klasse] << ['08:00', '08:45']
            HOURS_FOR_KLASSE[hd][klasse] << ['09:00', '09:45']
            HOURS_FOR_KLASSE[hd][klasse] << ['09:45', '10:30']
            HOURS_FOR_KLASSE[hd][klasse] << ['10:35', '11:20']
            HOURS_FOR_KLASSE[hd][klasse] << ['11:20', '12:05']
            HOURS_FOR_KLASSE[hd][klasse] << ['12:40', '13:25']
            HOURS_FOR_KLASSE[hd][klasse] << ['13:30', '14:15']
            HOURS_FOR_KLASSE[hd][klasse] << ['14:30', '15:15']
            HOURS_FOR_KLASSE[hd][klasse] << ['15:20', '16:05']
            HOURS_FOR_KLASSE[hd][klasse] << ['16:10', '16:55']
            HOURS_FOR_KLASSE[hd][klasse] << ['16:55', '17:40']
        end
    end
                       
    hd = '2020-11-23'
    HOURS_FOR_KLASSE[hd] = {}
    @@klassen_order.each do |klasse|
        klassenstufe = klasse.to_i
        HOURS_FOR_KLASSE[hd][klasse] = []
        if klassenstufe == 5 || klassenstufe == 6 || klasse == '7e'
            HOURS_FOR_KLASSE[hd][klasse] << ['08:00', '08:45']
            HOURS_FOR_KLASSE[hd][klasse] << ['08:50', '09:40']
            HOURS_FOR_KLASSE[hd][klasse] << ['09:40', '10:20']
            HOURS_FOR_KLASSE[hd][klasse] << ['10:40', '11:25']
            HOURS_FOR_KLASSE[hd][klasse] << ['11:25', '12:10']
            HOURS_FOR_KLASSE[hd][klasse] << ['12:15', '13:00']
            HOURS_FOR_KLASSE[hd][klasse] << ['13:40', '14:25']
            HOURS_FOR_KLASSE[hd][klasse] << ['14:30', '15:15']
            HOURS_FOR_KLASSE[hd][klasse] << ['15:20', '16:05']
            HOURS_FOR_KLASSE[hd][klasse] << ['16:10', '16:55']
            HOURS_FOR_KLASSE[hd][klasse] << ['16:55', '17:40']
        elsif [8, 9, 10].include?(klassenstufe) || ['7a', '7b', '7c'].include?(klasse)
            HOURS_FOR_KLASSE[hd][klasse] << ['08:00', '08:45']
            HOURS_FOR_KLASSE[hd][klasse] << ['08:50', '09:40']
            HOURS_FOR_KLASSE[hd][klasse] << ['09:55', '10:35']
            HOURS_FOR_KLASSE[hd][klasse] << ['10:40', '11:25']
            HOURS_FOR_KLASSE[hd][klasse] << ['11:25', '12:10']
            HOURS_FOR_KLASSE[hd][klasse] << ['12:50', '13:35']
            HOURS_FOR_KLASSE[hd][klasse] << ['13:40', '14:25']
            HOURS_FOR_KLASSE[hd][klasse] << ['14:30', '15:15']
            HOURS_FOR_KLASSE[hd][klasse] << ['15:20', '16:05']
            HOURS_FOR_KLASSE[hd][klasse] << ['16:10', '16:55']
            HOURS_FOR_KLASSE[hd][klasse] << ['16:55', '17:40']
        else
            HOURS_FOR_KLASSE[hd][klasse] << ['07:15', '08:45']
            HOURS_FOR_KLASSE[hd][klasse] << ['09:00', '09:45']
            HOURS_FOR_KLASSE[hd][klasse] << ['09:45', '10:30']
            HOURS_FOR_KLASSE[hd][klasse] << ['10:35', '11:20']
            HOURS_FOR_KLASSE[hd][klasse] << ['11:20', '12:05']
            HOURS_FOR_KLASSE[hd][klasse] << ['12:40', '13:25']
            HOURS_FOR_KLASSE[hd][klasse] << ['13:30', '14:15']
            HOURS_FOR_KLASSE[hd][klasse] << ['14:30', '15:15']
            HOURS_FOR_KLASSE[hd][klasse] << ['15:20', '16:05']
            HOURS_FOR_KLASSE[hd][klasse] << ['16:10', '16:55']
            HOURS_FOR_KLASSE[hd][klasse] << ['16:55', '17:40']
        end
    end
                       
    hd = '2021-01-04'
    HOURS_FOR_KLASSE[hd] = {}
    @@klassen_order.each do |klasse|
        klassenstufe = klasse.to_i
        HOURS_FOR_KLASSE[hd][klasse] = []
        if [5, 6].include?(klassenstufe) || klasse == '7e'
            HOURS_FOR_KLASSE[hd][klasse] << ['08:00', '08:45']
            HOURS_FOR_KLASSE[hd][klasse] << ['08:50', '09:40']
            HOURS_FOR_KLASSE[hd][klasse] << ['09:40', '10:20']
            HOURS_FOR_KLASSE[hd][klasse] << ['10:40', '11:25']
            HOURS_FOR_KLASSE[hd][klasse] << ['11:25', '12:10']
            HOURS_FOR_KLASSE[hd][klasse] << ['12:15', '13:00']
            HOURS_FOR_KLASSE[hd][klasse] << ['13:40', '14:25']
            HOURS_FOR_KLASSE[hd][klasse] << ['14:30', '15:15']
            HOURS_FOR_KLASSE[hd][klasse] << ['15:20', '16:05']
            HOURS_FOR_KLASSE[hd][klasse] << ['16:10', '16:55']
            HOURS_FOR_KLASSE[hd][klasse] << ['16:55', '17:40']
        elsif [7, 8, 9, 10].include?(klassenstufe)
            HOURS_FOR_KLASSE[hd][klasse] << ['08:00', '08:45']
            HOURS_FOR_KLASSE[hd][klasse] << ['08:50', '09:40']
            HOURS_FOR_KLASSE[hd][klasse] << ['09:55', '10:35']
            HOURS_FOR_KLASSE[hd][klasse] << ['10:40', '11:25']
            HOURS_FOR_KLASSE[hd][klasse] << ['11:25', '12:10']
            HOURS_FOR_KLASSE[hd][klasse] << ['12:50', '13:35']
            HOURS_FOR_KLASSE[hd][klasse] << ['13:40', '14:25']
            HOURS_FOR_KLASSE[hd][klasse] << ['14:30', '15:15']
            HOURS_FOR_KLASSE[hd][klasse] << ['15:20', '16:05']
            HOURS_FOR_KLASSE[hd][klasse] << ['16:10', '16:55']
            HOURS_FOR_KLASSE[hd][klasse] << ['16:55', '17:40']
        else
            HOURS_FOR_KLASSE[hd][klasse] << ['08:00', '08:45']
            HOURS_FOR_KLASSE[hd][klasse] << ['09:00', '09:45']
            HOURS_FOR_KLASSE[hd][klasse] << ['09:45', '10:30']
            HOURS_FOR_KLASSE[hd][klasse] << ['10:35', '11:20']
            HOURS_FOR_KLASSE[hd][klasse] << ['11:20', '12:05']
            HOURS_FOR_KLASSE[hd][klasse] << ['12:40', '13:25']
            HOURS_FOR_KLASSE[hd][klasse] << ['13:30', '14:15']
            HOURS_FOR_KLASSE[hd][klasse] << ['14:30', '15:15']
            HOURS_FOR_KLASSE[hd][klasse] << ['15:20', '16:05']
            HOURS_FOR_KLASSE[hd][klasse] << ['16:10', '16:55']
            HOURS_FOR_KLASSE[hd][klasse] << ['16:55', '17:40']
        end
    end
end

.force_reload_monitors ⇒ Object 



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# File 'src/ruby/include/monitor.rb', line 23

def self.force_reload_monitors
    (@@ws_clients[:monitor] || {}).each_pair do |client_id, info|
        ws = info[:ws]
        ws.send({:command => 'force_reload'}.to_json)
    end
end

.gen_password_for_email(email) ⇒ Object 



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# File 'src/ruby/main.rb', line 439

def self.gen_password_for_email(email)
    chars = 'BCDFGHJKMNPQRSTVWXYZ23456789'.split('')
    sha2 = Digest::SHA256.new()
    sha2 << EMAIL_PASSWORD_SALT
    sha2 << email
    srand(sha2.hexdigest.to_i(16))
    password = ''
    while true do
        if password =~ /[a-z]/ &&
        password =~ /[A-Z]/ &&
        password =~ /[0-9]/ &&
        password.include?('-')
            break
        end
        password = ''
        8.times do
            c = chars.sample.dup
            c.downcase! if [0, 1].sample == 1
            password += c
        end
        password += '-'
        4.times do
            c = chars.sample.dup
            c.downcase! if [0, 1].sample == 1
            password += c
        end
    end
    password
end

.get_all_homeschooling_users ⇒ Object 



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# File 'src/ruby/include/directory.rb', line 284

def self.get_all_homeschooling_users()
    temp = $neo4j.neo4j_query(<<~END_OF_QUERY)
        MATCH (u:User {homeschooling: true})
        RETURN u.email
    END_OF_QUERY
    all_homeschooling_users = Set.new()
    temp.each do |user|
        all_homeschooling_users << user['u.email']
    end
    all_homeschooling_users
end

.get_all_stream_restrictions ⇒ Object 



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# File 'src/ruby/include/lesson.rb', line 474

def self.get_all_stream_restrictions()
    temp = $neo4j.neo4j_query(<<~END_OF_QUERY)
        MATCH (l:Lesson)
        RETURN l.key AS lesson_key, COALESCE(l.stream_restriction, []) AS restriction
    END_OF_QUERY
    results = {}
    temp.each do |entry|
        lesson_key = entry['lesson_key']
        restriction = entry['restriction']
        while restriction.size < 5
            restriction << 0
        end
        results[lesson_key] = restriction
    end
    results
end

.get_aula_events ⇒ Object 



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# File 'src/ruby/include/aula.rb', line 3

def self.get_aula_events
    results = $neo4j.neo4j_query(<<~END_OF_QUERY).map { |x| x['e'] }
        MATCH (e:AulaEvent)
        RETURN e
        ORDER BY e.number, e.title;
    END_OF_QUERY
    results
end

.get_current_ab_week ⇒ Object

Returns A or B or nil



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# File 'src/ruby/include/directory.rb', line 308

def self.get_current_ab_week()
    get_switch_week_for_date(Date.today)
end

.get_current_salzh_status ⇒ Object 



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# File 'src/ruby/include/salzh.rb', line 343

def self.get_current_salzh_status
    entries = []
    temp = self.get_salzh_status_for_emails()
    temp.each_pair do |email, info|
        next unless @@user_info[email]
        next if @@user_info[email][:teacher]
        next if info[:status].nil?
        entries << {
            :email => email,
            :name => @@user_info[email][:display_name],
            :first_name => @@user_info[email][:display_first_name],
            :last_name => @@user_info[email][:display_last_name],
            :klasse => @@user_info[email][:klasse],
            :klasse_tr => tr_klasse(@@user_info[email][:klasse]),
            :status => info[:status],
            :status_end_date => info[:status_end_date]
        }
    end
    entries.sort! do |a, b|
        if a[:klasse] == b[:klasse]
            if a[:last_name] == b[:last_name]
                a[:first_name] <=> b[:first_name]
            else
                a[:last_name] <=> b[:last_name]
            end
        else
            (KLASSEN_ORDER.index(a[:klasse]) <=> KLASSEN_ORDER.index(b[:klasse]))
        end
    end
    entries
end

.get_current_salzh_status_for_all_teachers ⇒ Object 



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# File 'src/ruby/include/salzh.rb', line 387

def self.get_current_salzh_status_for_all_teachers
    all_entries = Main.get_current_salzh_status
    result = {}
    @@lehrer_order.each do |email|
        shorthand = @@user_info[email][:shorthand]
        entries = all_entries.select do |entry|
            (@@schueler_for_teacher[shorthand] || []).include?(entry[:email])
        end
        result[shorthand] = entries
    end
    result
end

.get_current_salzh_sus ⇒ Object 



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# File 'src/ruby/include/salzh.rb', line 259

def self.get_current_salzh_sus
    # purge stale salzh entries !!!
    Main.purge_stale_salzh_entries(false)

    rows = $neo4j.neo4j_query(<<~END_OF_QUERY)
        MATCH (s:Salzh)-[:BELONGS_TO]->(u:User)
        RETURN u.email, COALESCE(s.mode, 'salzh') AS smode, s.end_date;
    END_OF_QUERY

    entries = []
    rows.each do |row|
        email = row['u.email']
        mode = row['smode']
        end_date = row['s.end_date']
        entries << {
            :email => email,
            :name => @@user_info[email][:display_name],
            :first_name => @@user_info[email][:display_first_name],
            :last_name => @@user_info[email][:display_last_name],
            :klasse => @@user_info[email][:klasse],
            :klasse_tr => tr_klasse(@@user_info[email][:klasse]),
            :salzh_mode => mode,
            :salzh_end_date => end_date
        }
    end

    entries.sort! do |a, b|
        if a[:klasse] == b[:klasse]
            if a[:last_name] == b[:last_name]
                a[:first_name] <=> b[:first_name]
            else
                a[:last_name] <=> b[:last_name]
            end
        else
            (KLASSEN_ORDER.index(a[:klasse]) <=> KLASSEN_ORDER.index(b[:klasse]))
        end
    end
    entries
end

.get_homeschooling_for_user(email, datum = nil, is_homeschooling_user = nil, group2_for_email = nil) ⇒ Object 



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# File 'src/ruby/include/directory.rb', line 337

def self.get_homeschooling_for_user(email, datum = nil, is_homeschooling_user = nil, group2_for_email = nil)
    datum ||= Date.today.strftime('%Y-%m-%d')
    if is_homeschooling_user.nil?
        self.get_homeschooling_for_user_by_switch_week(email, datum, group2_for_email) || self.get_homeschooling_for_user_by_dauer_salzh(email)
    else
        self.get_homeschooling_for_user_by_switch_week(email, datum, group2_for_email)
    end
end

.get_homeschooling_for_user_by_dauer_salzh(email) ⇒ Object 



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# File 'src/ruby/include/directory.rb', line 312

def self.get_homeschooling_for_user_by_dauer_salzh(email)
    info = $neo4j.neo4j_query_expect_one(<<~END_OF_QUERY, {:email => email})
        MATCH (u:User {email: $email})
        RETURN COALESCE(u.homeschooling, false) AS homeschooling
    END_OF_QUERY
    marked_as_homeschooling = info['homeschooling']
    marked_as_homeschooling
end

.get_homeschooling_for_user_by_switch_week(email, datum, group2_for_email) ⇒ Object 



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# File 'src/ruby/include/directory.rb', line 321

def self.get_homeschooling_for_user_by_switch_week(email, datum, group2_for_email)
    group2 = nil
    if group2_for_email.nil?
        info = $neo4j.neo4j_query_expect_one(<<~END_OF_QUERY, {:email => email})
            MATCH (u:User {email: $email})
            RETURN COALESCE(u.group2, 'A') AS group2
        END_OF_QUERY
        group2 = info['group2']
    else
        group2 = group2_for_email
    end
    current_week = get_switch_week_for_date(Date.parse(datum))
    marked_as_homeschooling_by_week = (current_week != group2)
    marked_as_homeschooling_by_week
end

.get_homework_feedback_for_lesson_key(lesson_key) ⇒ Object 



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# File 'src/ruby/include/homework.rb', line 23

def self.get_homework_feedback_for_lesson_key(lesson_key)
    hf = $neo4j.neo4j_query(<<~END_OF_QUERY, :lesson_key => lesson_key).map { |x| {:offset => x['li.offset'], :hf => x['hf']} }
        MATCH (u:User)<-[:FROM]-(hf:HomeworkFeedback)-[:FOR]->(li:LessonInfo)-[:BELONGS_TO]->(l:Lesson {key: $lesson_key})
        RETURN hf, li.offset
        ORDER BY li.offset;
    END_OF_QUERY
    results = {}
    hf.each do |_entry|
        entry = _entry[:hf]
        offset = _entry[:offset]
        results[offset] ||= {
            :state_histogram => {},
            :time_spent_min => nil,
            :time_spent_max => nil
        }
        if entry[:state]
            results[offset][:state_histogram][entry[:state]] ||= 0
            results[offset][:state_histogram][entry[:state]] += 1
        end
        if entry[:time_spent]
            results[offset][:time_spent_min] ||= entry[:time_spent]
            results[offset][:time_spent_min] = entry[:time_spent] if entry[:time_spent] < results[offset][:time_spent_min]
            results[offset][:time_spent_max] ||= entry[:time_spent]
            results[offset][:time_spent_max] = entry[:time_spent] if entry[:time_spent] > results[offset][:time_spent_max]
        end
    end
    final_result = {}
    results.each_pair do |offset, data|
        result = {}
        if results[offset][:time_spent_min]
            if results[offset][:time_spent_min] != results[offset][:time_spent_max]
                result[:time_spent] = "#{results[offset][:time_spent_min]} – #{results[offset][:time_spent_max]} Minuten"
            else
                result[:time_spent] = "#{results[offset][:time_spent_min]} Minuten"
            end
        end
        unless results[offset][:state_histogram].empty?
            parts = []
            short_parts = []
            HOMEWORK_FEEDBACK_STATES.each do |state|
                if results[offset][:state_histogram][state]
                    parts << "#{HOMEWORK_FEEDBACK_EMOJIS[state]} × #{results[offset][:state_histogram][state]}"
                    short_parts << "#{HOMEWORK_FEEDBACK_EMOJIS[state]}"
                end
            end
            result[:state] = parts.join(', ')
            result[:short_state] = short_parts.join('')
        end
        final_result[offset] = result
    end
    final_result
end

.get_hotspot_klassen ⇒ Object 



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# File 'src/ruby/include/salzh.rb', line 227

def self.get_hotspot_klassen
    # purge stale entries
    Main.purge_stale_salzh_entries(false)

    hotspot_dates = {}
    rows = $neo4j.neo4j_query(<<~END_OF_QUERY)
        MATCH (k:Klasse)
        RETURN k.klasse, k.hotspot_end_date;
    END_OF_QUERY
    rows.each do |x|
        hotspot_dates[x['k.klasse']] = x['k.hotspot_end_date']
    end
    StringIO.open do |io|
        KLASSEN_ORDER.each do |klasse|
            next if ['11', '12'].include?(klasse)
            io.puts "<tr data-klasse='#{klasse}'>"
            io.puts "<td>#{tr_klasse(klasse)}</td>"
            # io.puts "<td>#{@@schueler_for_klasse[klasse].size}</td>"
            io.puts "<td>"
            hotspot_end_date = hotspot_dates[klasse]
            io.puts "<div class='input-group input-group-sm'><input type='date' class='form-control ti_hotspot_end_date' value='#{hotspot_end_date}' /><div class='input-group-append'><button #{hotspot_end_date.nil? ? 'disabled' : ''} class='btn #{hotspot_end_date.nil? ? 'btn-outline-secondary' : 'btn-danger'} bu_delete_hotspot_end_date'><i class='fa fa-trash'></i></button></div></div>"
            io.puts "</td>"
        io.puts "</tr>"
        end
        io.string
    end
end

.get_lesson_data(lesson_key) ⇒ Object 



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# File 'src/ruby/include/lesson.rb', line 132

def self.get_lesson_data(lesson_key)
    # purge unconfirmed tablet bookings for this lesson_key
    $neo4j.neo4j_query(<<~END_OF_QUERY, :key => lesson_key)
        MATCH (t:Tablet)<-[:WHICH]-(b:Booking {confirmed: false})-[:FOR]->(i:LessonInfo)-[:BELONGS_TO]->(l:Lesson {key: $key})
        DETACH DELETE b;
    END_OF_QUERY
    # purge unconfirmed tablet bookings for any lesson key older than 30 minutes
    $neo4j.neo4j_query(<<~END_OF_QUERY, :timestamp => (Time.now - 30 * 60).to_i)
        MATCH (t:Tablet)<-[:WHICH]-(b:Booking {confirmed: false})-[:FOR]->(i:LessonInfo)-[:BELONGS_TO]->(l:Lesson)
        WHERE b.updated < $timestamp
        DETACH DELETE b;
    END_OF_QUERY
    rows = $neo4j.neo4j_query(<<~END_OF_QUERY, :key => lesson_key).map { |x| x['i'] }
        MATCH (i:LessonInfo)-[:BELONGS_TO]->(l:Lesson {key: $key})
        RETURN i
        ORDER BY i.offset;
    END_OF_QUERY
    results = {}
    rows.each do |row|
        results[row[:offset]] ||= {}
        results[row[:offset]][:info] = row.reject do |k, v|
            [:offset, :updated].include?(k)
        end
    end
    rows = $neo4j.neo4j_query(<<~END_OF_QUERY, :key => lesson_key).map { |x| {:comment => x['c'], :user => x['u'], :text_comment_from => x['tcf.email'] } }
        MATCH (u:User)<-[:TO]-(c:TextComment)-[:BELONGS_TO]->(l:Lesson {key: $key})
        MATCH (c)-[:FROM]->(tcf:User)
        RETURN c, u, tcf.email
        ORDER BY c.offset;
    END_OF_QUERY
    rows.each do |row|
        results[row[:comment][:offset]] ||= {}
        results[row[:comment][:offset]][:comments] ||= {}
        results[row[:comment][:offset]][:comments][row[:user][:email]] ||= {}
        if row[:comment][:comment]
            results[row[:comment][:offset]][:comments][row[:user][:email]][:text_comment] = row[:comment][:comment]
            results[row[:comment][:offset]][:comments][row[:user][:email]][:text_comment_from] = row[:text_comment_from]
        end
    end
    rows = $neo4j.neo4j_query(<<~END_OF_QUERY, :key => lesson_key).map { |x| {:comment => x['c'], :user => x['u'], :audio_comment_from => x['acf.email'] } }
        MATCH (u:User)<-[:TO]-(c:AudioComment)-[:BELONGS_TO]->(l:Lesson {key: $key})
        MATCH (c)-[:FROM]->(acf:User)
        RETURN c, u, acf.email
        ORDER BY c.offset;
    END_OF_QUERY
    rows.each do |row|
        results[row[:comment][:offset]] ||= {}
        results[row[:comment][:offset]][:comments] ||= {}
        results[row[:comment][:offset]][:comments][row[:user][:email]] ||= {}
        if row[:comment][:tag]
            results[row[:comment][:offset]][:comments][row[:user][:email]][:audio_comment_tag] = row[:comment][:tag]
            results[row[:comment][:offset]][:comments][row[:user][:email]][:duration] = row[:comment][:duration]
            results[row[:comment][:offset]][:comments][row[:user][:email]][:audio_comment_from] = row[:audio_comment_from]
        end
    end
    rows = $neo4j.neo4j_query(<<~END_OF_QUERY, :key => lesson_key).map { |x| {:offset => x['li.offset'], :feedback => x['hf'], :user => x['u.email'] }}
        MATCH (u:User)<-[:FROM]-(hf:HomeworkFeedback)-[:FOR]->(li:LessonInfo)-[:BELONGS_TO]->(l:Lesson {key: $key})
        RETURN hf, li.offset, u.email;
    END_OF_QUERY
    rows.each do |row|
        results[row[:offset]] ||= {}
        results[row[:offset]][:feedback] ||= {}
        results[row[:offset]][:feedback][:sus] ||= {}
        results[row[:offset]][:feedback][:sus][row[:user]] = row[:feedback].reject do |k, v|
            [:done].include?(k)
        end
        results[row[:offset]][:feedback][:sus][row[:user]][:name] = (@@user_info[row[:user]] || {})[:display_name]
    end
    results.each_pair do |offset, info|
        next unless info[:feedback]
        results[offset][:feedback][:summary] = 'Es liegt bisher kein Feedback zu dieser Stunde vor.'
        feedback_str = StringIO.open do |io|
            state_histogram = {}
            time_spent_values = []
            info[:feedback][:sus].each_pair do |email, feedback|
                if feedback[:state]
                    state_histogram[feedback[:state]] ||= 0
                    state_histogram[feedback[:state]] += 1
                end
                if feedback[:time_spent]
                    time_spent_values << feedback[:time_spent]
                end
            end
            unless state_histogram.empty?
                io.puts "<p>"
                parts = []
                HOMEWORK_FEEDBACK_STATES.each do |x|
                    parts << "#{HOMEWORK_FEEDBACK_EMOJIS[x]} × #{state_histogram[x]}" if state_histogram[x]
                end
                io.puts parts.join(', ')
                io.puts "</p>"
            end
            time_spent_values.sort!
            unless time_spent_values.empty?
                io.puts "<p>"
                io.puts "SuS haben zwischen #{time_spent_values.first} und #{time_spent_values.last} Minuten für diese Hausaufgabe benötigt (#{time_spent_values.size} Angabe#{time_spent_values.size == 1 ? '' : 'n'})."
                io.puts "</p>"
            end
            io.string
        end
        results[offset][:feedback][:summary] = feedback_str
    end

    rows = $neo4j.neo4j_query(<<~END_OF_QUERY, :key => lesson_key)
        MATCH (t:Tablet)<-[:WHICH]-(b:Booking {confirmed: true})-[:FOR]->(i:LessonInfo)-[:BELONGS_TO]->(l:Lesson {key: $key})
        RETURN t.id, i.offset;
    END_OF_QUERY
    rows.each do |entry|
        offset = entry['i.offset']
        tablet_id = entry['t.id']
        results[offset] ||= {}
        results[offset][:info] ||= {}
        results[offset][:info][:booked_tablet] = {
            :tablet_id => tablet_id,
            :lagerort => @@tablets[tablet_id][:lagerort],
            :bg_color => @@tablets[tablet_id][:bg_color],
            :fg_color => @@tablets[tablet_id][:fg_color]
        }
    end

    rows = $neo4j.neo4j_query(<<~END_OF_QUERY, :key => lesson_key)
        MATCH (t:TabletSet)<-[:BOOKED]-(b:Booking)-[:FOR]->(i:LessonInfo)-[:BELONGS_TO]->(l:Lesson {key: $key})
        RETURN t.id, i.offset
        ORDER BY t.id;
    END_OF_QUERY
    rows.each do |entry|
        offset = entry['i.offset']
        tablet_set_id = entry['t.id']
        results[offset] ||= {}
        results[offset][:info] ||= {}
        results[offset][:info][:booked_tablet_sets] ||= []
        results[offset][:info][:booked_tablet_sets] << tablet_set_id
        results[offset][:info][:booked_tablet_sets_tablet_count] ||= 0
        results[offset][:info][:booked_tablet_sets_tablet_count] += @@tablet_sets[tablet_set_id][:count]
    end

    results
end

.get_regular_testing_days ⇒ Object 



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# File 'src/ruby/include/salzh.rb', line 1012

def self.get_regular_testing_days()
    pattern = $neo4j.neo4j_query_expect_one(<<~END_OF_QUERY)['pattern']
        MERGE (n:RegularTestingDays)
        RETURN COALESCE(n.pattern, 0) AS pattern;
    END_OF_QUERY
    return (0..4).map do |i|
        ((pattern >> i) & 1) == 0
    end
end

.get_salzh_status_for_emails(emails = nil, force_refresh = true) ⇒ Object 



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# File 'src/ruby/include/salzh.rb', line 32

def self.get_salzh_status_for_emails(emails = nil, force_refresh = true) 

    Main.purge_stale_salzh_entries(false)

    temp = []
    temp2 = []

    hotspot_dates = {}
    rows = $neo4j.neo4j_query(<<~END_OF_QUERY)
        MATCH (k:Klasse)
        RETURN k.klasse, k.hotspot_end_date;
    END_OF_QUERY
    rows.each do |x|
        hotspot_dates[x['k.klasse']] = x['k.hotspot_end_date']
    end

    if emails.nil?
        temp = $neo4j.neo4j_query(<<~END_OF_QUERY)
            MATCH (s:Salzh)-[:BELONGS_TO]->(u:User)
            RETURN COALESCE(s.mode, 'salzh') AS smode, s.end_date, u.email;
        END_OF_QUERY
        temp2 = $neo4j.neo4j_query(<<~END_OF_QUERY)
            MATCH (u:User)
            RETURN u.email, u.freiwillig_salzh, COALESCE(u.testing_required, TRUE) AS testing_required,
            COALESCE(u.voluntary_testing, FALSE) AS voluntary_testing;
        END_OF_QUERY
    else
        emails = [emails] unless emails.is_a? Array
        temp = $neo4j.neo4j_query(<<~END_OF_QUERY, {:emails => emails})
            MATCH (s:Salzh)-[:BELONGS_TO]->(u:User)
            WHERE u.email IN $emails
            RETURN COALESCE(s.mode, 'salzh') AS smode, s.end_date, u.email;
        END_OF_QUERY
        temp2 = $neo4j.neo4j_query(<<~END_OF_QUERY, {:emails => emails})
            MATCH (u:User)
            WHERE u.email IN $emails
            RETURN u.email, u.freiwillig_salzh, COALESCE(u.testing_required, TRUE) AS testing_required,
            COALESCE(u.voluntary_testing, FALSE) AS voluntary_testing;
        END_OF_QUERY
    end

    result = {}
    temp2.each do |row|
        email = row['u.email']
        result[email] = {
            :freiwillig_salzh => row['u.freiwillig_salzh'], # end_date or nil
            :testing_required => row['testing_required'],
            :voluntary_testing => row['voluntary_testing']
        }
    end
    temp.each do |row|
        result[row['u.email']][:salzh] = row['smode']
        result[row['u.email']][:salzh_end_date] = row['s.end_date']
    end
    result.each_pair do |email, info|
        status = nil
        status_end_date = nil
        if info[:freiwillig_salzh]
            status = :salzh
            status_end_date = info[:freiwillig_salzh]
            if info[:salzh] == 'salzh'
                status_end_date = [status_end_date, info[:salzh_end_date]].max
            end
        else
            if info[:salzh] == 'salzh'
                status = :salzh
                status_end_date = info[:salzh_end_date]
            elsif info[:salzh] == 'contact_person'
                status = :contact_person
                status_end_date = info[:salzh_end_date]
            end
        end
        if status.nil?
            # see if it's a hotspot klasse
            if @@user_info[email]
                klasse = @@user_info[email][:klasse]
                if hotspot_dates[klasse]
                    status = :hotspot_klasse
                    status_end_date = hotspot_dates[klasse]
                end
            end
        end
        info[:status] = status
        info[:status_end_date] = status_end_date
        wday = DateTime.now.wday
        needs_testing_today = true
        unless info[:testing_required]
            needs_testing_today = false
        end
        info[:needs_testing_today] = needs_testing_today

    end
    result
end

.get_stream_restriction_for_lesson_key(lesson_key) ⇒ Object 



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# File 'src/ruby/include/lesson.rb', line 463

def self.get_stream_restriction_for_lesson_key(lesson_key)
    results = $neo4j.neo4j_query_expect_one(<<~END_OF_QUERY, :key => lesson_key)['restriction']
        MERGE (l:Lesson {key: $key})
        RETURN COALESCE(l.stream_restriction, []) AS restriction
    END_OF_QUERY
    while results.size < 5
        results << 0
    end
    results
end

.get_switch_week_for_date(d) ⇒ Object 



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# File 'src/ruby/include/directory.rb', line 296

def self.get_switch_week_for_date(d)
    ds = d.strftime('%Y-%m-%d')
    d_info = SWITCH_WEEKS.keys.sort.select do |d|
        ds >= d
    end.last
    info = SWITCH_WEEKS[d_info]
    return nil if info.nil?
    week_number = (d.strftime('%-V').to_i - Date.parse(d_info).strftime('%-V').to_i)
    return (((week_number + (info[0].ord - 'A'.ord)) % info[1]) + 'A'.ord).chr
end

.get_test_events ⇒ Object 



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# File 'src/ruby/include/test_events.rb', line 2

def self.get_test_events
    ts_now = DateTime.now.strftime('%Y-%m-%d')
    # $neo4j.neo4j_query(<<~END_OF_QUERY, :today => ts_now).map { |x| x['e'] }
    #     MATCH (e:TestEvent)
    #     WHERE e.date < $today
    #     DELETE e;
    # END_OF_QUERY
    results = $neo4j.neo4j_query(<<~END_OF_QUERY, :today => ts_now).map { |x| x['e'] }
        MATCH (e:TestEvent)
        RETURN e
        ORDER BY e.date, e.title;
    END_OF_QUERY
    results
end

.get_test_list_label_type(status, regular_test_required, regular_test_day) ⇒ Object 



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# File 'src/ruby/include/salzh.rb', line 804

def self.get_test_list_label_type(status, regular_test_required, regular_test_day)
    today = DateTime.now.strftime('%Y-%m-%d')
    if status == :salzh
        return :strike
    end
    if status == :hotspot_klasse
        return :enabled
    end
    if status == :contact_person
        return :enabled
    end
    if regular_test_required == false
        return :enabled if today >= '2022-04-01'
        return :disabled
    end
    if regular_test_required && !regular_test_day && status == nil
        return :enabled if today >= '2022-04-01'
        return :disabled
    end
    return :enabled
end

.get_voluntary_testing_sus ⇒ Object 



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# File 'src/ruby/include/salzh.rb', line 303

def self.get_voluntary_testing_sus
    rows = $neo4j.neo4j_query(<<~END_OF_QUERY).select do |x|
        MATCH (u:User {voluntary_testing: true})
        RETURN u.email, u.last_skipped_voluntary_testing;
    END_OF_QUERY
        @@user_info[x['u.email']]
    end.map do |x|
        d = @@user_info[x['u.email']]
        d[:last_skipped_voluntary_testing] = x['u.last_skipped_voluntary_testing']
        d
    end

    rows.sort! do |a, b|
        if a[:klasse] == b[:klasse]
            if a[:last_name] == b[:last_name]
                a[:first_name] <=> b[:first_name]
            else
                a[:last_name] <=> b[:last_name]
            end
        else
            (KLASSEN_ORDER.index(a[:klasse]) <=> KLASSEN_ORDER.index(b[:klasse]))
        end
    end
    today_s = DateTime.now.strftime('%Y-%m-%d')
    rows.map do |info|
        {
            :email => info[:email],
            :first_name => info[:first_name],
            :last_name => info[:last_name],
            :display_name => info[:display_name],
            :skipped_today => info[:last_skipped_voluntary_testing] == today_s,
            :klasse => tr_klasse(info[:klasse])
        }
    end
end

.get_website_events ⇒ Object 



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# File 'src/ruby/include/website.rb', line 11

def self.get_website_events
    ts_now = DateTime.now.strftime('%Y-%m-%d')
    $neo4j.neo4j_query(<<~END_OF_QUERY, :today => ts_now).map { |x| x['e'] }
        MATCH (e:WebsiteEvent)
        WHERE e.date_end IS NULL AND e.date < $today
        DELETE e;
    END_OF_QUERY
    $neo4j.neo4j_query(<<~END_OF_QUERY, :today => ts_now).map { |x| x['e'] }
        MATCH (e:WebsiteEvent)
        WHERE e.date_end IS NOT NULL AND e.date_end < $today
        DELETE e;
    END_OF_QUERY
    results = $neo4j.neo4j_query(<<~END_OF_QUERY, :today => ts_now).map { |x| x['e'] }
        MATCH (e:WebsiteEvent)
        RETURN e
        ORDER BY e.date, e.title;
    END_OF_QUERY
    results
end

.invite_external_user_for_event(eid, email, session_user_email) ⇒ Object 



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# File 'src/ruby/include/event.rb', line 168

def self.invite_external_user_for_event(eid, email, session_user_email)
    STDERR.puts "Sending invitation mail for event #{eid} to #{email}"
    timestamp = Time.now.to_i
    data = {}
    data[:eid] = eid
    data[:email] = email
    data[:timestamp] = timestamp
    event = nil
    # TODO: There is a potential bug here when someone adds a PredefinedExternalUser
    # as a recipient and there will be two results here where we would have expected
    # one before
    temp = $neo4j.neo4j_query(<<~END_OF_QUERY, data).first
        MATCH (u:User)<-[:ORGANIZED_BY]-(e:Event {id: $eid})<-[rt:IS_PARTICIPANT]-(r)
        WHERE (r:ExternalUser OR r:PredefinedExternalUser) AND (r.email = $email) AND COALESCE(rt.deleted, false) = false AND COALESCE(e.deleted, false) = false
        RETURN e, u.email;
    END_OF_QUERY
    event = temp['e']
    session_user = @@user_info[temp['u.email']][:display_last_name]
    code = Digest::SHA2.hexdigest(EXTERNAL_USER_EVENT_SCRAMBLER + data[:eid] + data[:email]).to_i(16).to_s(36)[0, 8]
    # remove invitation request / if something goes wrong, we won't keep sending out invites blocking the queue
    rows = $neo4j.neo4j_query(<<~END_OF_QUERY, data)
        MATCH (e:Event {id: $eid})<-[rt:IS_PARTICIPANT]-(r)
        WHERE (r:ExternalUser OR r:PredefinedExternalUser) AND (r.email = $email) AND COALESCE(rt.deleted, false) = false AND COALESCE(e.deleted, false) = false
        REMOVE rt.invitation_requested;
    END_OF_QUERY
    begin
        deliver_mail do
            to data[:email]
            bcc SMTP_FROM
            from SMTP_FROM
            reply_to "#{@@user_info[session_user_email][:display_name]} <#{session_user_email}>"
            
            subject "Einladung: #{event[:title]}"

            StringIO.open do |io|
                io.puts "<p>Sie haben eine Einladung zu einem Termin via Jitsi Meet erhalten.</p>"
                io.puts "<p>"
                io.puts "Eingeladen von: #{session_user}<br />"
                io.puts "Titel: #{event[:title]}<br />"
                io.puts "Datum und Uhrzeit: #{WEEKDAYS[Time.parse(event[:date]).wday]}., den #{Time.parse(event[:date]).strftime('%d.%m.%Y')}, #{event[:start_time]} &ndash; #{event[:end_time]}<br />"
                link = WEB_ROOT + "/e/#{data[:eid]}/#{code}"
                io.puts "</p>"
                io.puts "<p>Link zum Termin:<br /><a href='#{link}'>#{link}</a></p>"
                io.puts "<p>Bitte geben Sie den Link nicht weiter. Er ist personalisiert und enthält Ihren Namen, den Raumnamen und ist nur am Tag des Termins gültig.</p>"
                io.puts event[:description]
                io.string
            end
        end
    rescue
        deliver_mail do
            to session_user_email
            bcc SMTP_FROM
            from SMTP_FROM
            
            subject "Einladung konnte nicht versendet werden: #{event[:title]}"

            StringIO.open do |io|
                io.puts "<p>Die Einladung für den folgenden Termin konnte nicht versendet werden:</p>"
                io.puts "<p>"
                io.puts "E-Mail: #{data[:email]}<br />"
                io.puts "Titel: #{event[:title]}<br />"
                io.puts "Datum und Uhrzeit: #{WEEKDAYS[Time.parse(event[:date]).wday]}., den #{Time.parse(event[:date]).strftime('%d.%m.%Y')}, #{event[:start_time]} &ndash; #{event[:end_time]}<br />"
                link = WEB_ROOT + "/e/#{data[:eid]}/#{code}"
                io.puts "</p>"
                io.puts "<p>Link zum Termin:<br /><a href='#{link}'>#{link}</a></p>"
                io.puts "<p>Bitte überprüfen Sie die E-Mail-Adresse, sie ist vermutlich falsch.</p>"
                io.string
            end
        end
    end
    # add timestamp to list of successfully sent invitations
    rows = $neo4j.neo4j_query(<<~END_OF_QUERY, data)
        MATCH (e:Event {id: $eid})<-[rt:IS_PARTICIPANT]-(r)
        WHERE (r:ExternalUser OR r:PredefinedExternalUser) AND (r.email = $email) AND COALESCE(rt.deleted, false) = false AND COALESCE(e.deleted, false) = false
        SET rt.invitations = COALESCE(rt.invitations, []) + [$timestamp];
    END_OF_QUERY
end

.invite_external_user_for_poll_run(prid, email, session_user_email) ⇒ Object 



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# File 'src/ruby/include/poll.rb', line 789

def self.invite_external_user_for_poll_run(prid, email, session_user_email)
    STDERR.puts "Sending invitation mail for poll run #{prid} to #{email}"
    timestamp = Time.now.to_i
    data = {}
    data[:prid] = prid
    data[:email] = email
    data[:timestamp] = timestamp
    poll_run = nil
    results = $neo4j.neo4j_query(<<~END_OF_QUERY, data)
        MATCH (u:User)<-[:ORGANIZED_BY]-(p:Poll)<-[:RUNS]-(pr:PollRun {id: $prid})<-[rt:IS_PARTICIPANT]-(r)
        WHERE (r:ExternalUser OR r:PredefinedExternalUser) AND (r.email = $email) AND COALESCE(rt.deleted, false) = false AND COALESCE(pr.deleted, false) = false AND COALESCE(p.deleted, false) = false
        RETURN pr, p, u.email;
    END_OF_QUERY
    if results.empty?
        raise 'no results found, expected at least one!'
    end
    temp = results.first
    poll_run = temp['pr']
    poll = temp['p']
    session_user = @@user_info[temp['u.email']][:display_last_name]
    code = Digest::SHA2.hexdigest(EXTERNAL_USER_EVENT_SCRAMBLER + data[:prid] + data[:email]).to_i(16).to_s(36)[0, 8]
    rows = $neo4j.neo4j_query(<<~END_OF_QUERY, data)
        MATCH (pr:PollRun {id: $prid})<-[rt:IS_PARTICIPANT]-(r)
        WHERE (r:ExternalUser OR r:PredefinedExternalUser) AND (r.email = $email) AND COALESCE(rt.deleted, false) = false AND COALESCE(pr.deleted, false) = false
        REMOVE rt.invitation_requested
    END_OF_QUERY
    begin
        deliver_mail do
            to data[:email]
            bcc SMTP_FROM
            from SMTP_FROM
            reply_to "#{@@user_info[session_user_email][:display_name]} <#{session_user_email}>"

            subject "Einladung zur Umfrage: #{poll[:title]}"

            StringIO.open do |io|
                io.puts "<p>Sie haben eine Einladung zu einer Umfrage erhalten.</p>"
                io.puts "<p>"
                io.puts "Eingeladen von: #{session_user}<br />"
                io.puts "Titel: #{poll[:title]}<br />"
                io.puts "Datum und Uhrzeit: #{WEEKDAYS[Time.parse(poll_run[:start_date]).wday]}., den #{Time.parse(poll_run[:start_date]).strftime('%d.%m.%Y')}, #{poll_run[:start_time]} &ndash; #{WEEKDAYS[Time.parse(poll_run[:end_date]).wday]}., den #{Time.parse(poll_run[:end_date]).strftime('%d.%m.%Y')}, #{poll_run[:end_time]}<br />"
                link = WEB_ROOT + "/p/#{data[:prid]}/#{code}"
                io.puts "</p>"
                io.puts "<p>Link zur Umfrage:<br /><a href='#{link}'>#{link}</a></p>"
                io.puts "<p>Bitte geben Sie den Link nicht weiter. Er ist personalisiert und nur im angegebenen Zeitraum gültig.</p>"
                io.string
            end
        end
        rows = $neo4j.neo4j_query(<<~END_OF_QUERY, data)
            MATCH (pr:PollRun {id: $prid})<-[rt:IS_PARTICIPANT]-(r)
            WHERE (r:ExternalUser OR r:PredefinedExternalUser) AND (r.email = $email) AND COALESCE(rt.deleted, false) = false AND COALESCE(pr.deleted, false) = false
            SET rt.invitations = COALESCE(rt.invitations, []) + [$timestamp];
        END_OF_QUERY
    rescue
        deliver_mail do
            to session_user_email
            bcc SMTP_FROM
            from SMTP_FROM

            subject "Einladung zur Umfrage konnte nicht versendet werden: #{poll[:title]}"

            StringIO.open do |io|
                io.puts "<p>Die Einladung für die folgende Umfrage konnte nicht versendet werden:</p>"
                io.puts "<p>"
                io.puts "E-Mail: #{data[:email]}<br />"
                io.puts "Titel: #{poll[:title]}<br />"
                io.puts "Datum und Uhrzeit: #{WEEKDAYS[Time.parse(poll_run[:start_date]).wday]}., den #{Time.parse(poll_run[:start_date]).strftime('%d.%m.%Y')}, #{poll_run[:start_time]} &ndash; #{WEEKDAYS[Time.parse(poll_run[:end_date]).wday]}., den #{Time.parse(poll_run[:end_date]).strftime('%d.%m.%Y')}, #{poll_run[:end_time]}<br />"
                link = WEB_ROOT + "/p/#{data[:prid]}/#{code}"
                io.puts "</p>"
                io.puts "<p>Link zur Umfrage:<br /><a href='#{link}'>#{link}</a></p>"
                io.puts "<p>Bitte überprüfen Sie die E-Mail-Adresse, sie ist vermutlich falsch.</p>"
                io.string
            end
        end
    end
end

.iterate_school_days(options = {}, &block) ⇒ Object 



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# File 'src/ruby/main.rb', line 422

def self.iterate_school_days(options = {}, &block)
    day = Date.parse(@@config[:first_day])
    last_day = Date.parse(@@config[:last_day])
    while day <= last_day do
        ds = day.to_s
        off_day = @@off_days.include?(ds)
        unless off_day
            yield ds, (day.wday + 6) % 7
        end
        day += 1
    end
end

.log_freiwillig_salzh_sus_for_today ⇒ Object 



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# File 'src/ruby/include/salzh.rb', line 989

def self.log_freiwillig_salzh_sus_for_today()
    wall_time = Time.now.strftime('%H:%M')
    return if wall_time < '12:00'
    today = Date.today.strftime('%Y-%m-%d')
    path = "/internal/salzh_protocol/#{today}.txt"
    return if File.exist?(path)

    unless File.exist?(File.dirname(path))
        FileUtils.mkpath(File.dirname(path))
    end

    Main.purge_stale_salzh_entries(true)
    rows = $neo4j.neo4j_query(<<~END_OF_QUERY).map { |x| x['u.email'] }
        MATCH (u:User)
        WHERE EXISTS(u.freiwillig_salzh)
        RETURN u.email;
    END_OF_QUERY
    File.open(path, 'w') do |f|
        f.puts "# watch out, only count days which were actual school days! we need to filter this..."
        f.puts rows.join("\n")
    end
end

.parse_zeugnisformulare ⇒ Object 



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# File 'src/ruby/include/zeugnisse.rb', line 13

def self.parse_zeugnisformulare
    FileUtils.mkpath('/internal/lowriter_home')
    @@zeugnisse = {}
    @@zeugnisse[:formulare] ||= {}
    debug "Parsing Zeugnisformulare..."
    Dir["/data/zeugnisse/formulare/#{ZEUGNIS_SCHULJAHR}/#{ZEUGNIS_HALBJAHR}/*.docx"].each do |path|
        sha1 = Digest::SHA1.hexdigest(File.read(path))
        out_path = File.join("/internal/zeugnisse/formulare/#{sha1}")
        unless File.exist?(out_path)
            FileUtils.mkpath(File.dirname(out_path))
            system("unzip -d \"#{out_path}\" \"#{path}\"")
        end
        doc = File.read(File.join(out_path, 'word', 'document.xml'))
        tags = doc.scan(/[#\$][A-Za-z0-9_]+\./)
        key = File.basename(path).sub('.docx', '')
        debug "#{key} (#{out_path}): #{tags.to_json}"
        @@zeugnisse[:formulare][key] ||= {}
        @@zeugnisse[:formulare][key][:sha1] = sha1
        @@zeugnisse[:formulare][key][:tags] = tags.map { |x| x[0, x.size - 1] }
        @@zeugnisse[:formulare][key][:formular_fehler] = self.check_zeugnisformular(key)
        if ZEUGNIS_HALBJAHR == '2'
            unless doc.include?('<w:strike/></w:rPr><w:t>nicht</w:t>')
                @@zeugnisse[:formulare][key][:formular_fehler] ||= []
                @@zeugnisse[:formulare][key][:formular_fehler] << "fehlende Versetzungsmarkierung (<s>nicht</s>)"
            end
        end
    end

    self.determine_zeugnislisten()
end

.purge_stale_salzh_entries(force = true) ⇒ Object 



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# File 'src/ruby/include/salzh.rb', line 6

def self.purge_stale_salzh_entries(force = true)
    today = Date.today.strftime('%Y-%m-%d')
    unless force
        @@last_purge_stale_salzh_entries_date ||= ''
        if today <= @@last_purge_stale_salzh_entries_date
            return
        end
        @@last_purge_stale_salzh_entries_date = today
    end
    $neo4j.neo4j_query(<<~END_OF_QUERY, :today => today)
        MATCH (s:Salzh)-[:BELONGS_TO]->(u:User)
        WHERE s.end_date < $today
        DETACH DELETE s;
    END_OF_QUERY
    $neo4j.neo4j_query(<<~END_OF_QUERY, :today => today)
        MATCH (u:User)
        WHERE EXISTS(u.freiwillig_salzh) AND u.freiwillig_salzh < $today
        REMOVE u.freiwillig_salzh;
    END_OF_QUERY
    $neo4j.neo4j_query(<<~END_OF_QUERY, :today => today)
        MATCH (k:Klasse)
        WHERE k.hotspot_end_date < $today
        DETACH DELETE k;
    END_OF_QUERY
end

.refresh_bib_data ⇒ Object 



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# File 'src/ruby/main.rb', line 1185

def self.refresh_bib_data()
    begin
        now = Time.now.to_i
        return if now - @@bib_summoned_books_last_ts < 60 * (DEVELOPMENT ? 1 : 60)
        @@bib_summoned_books_last_ts = now
        @@bib_summoned_books = {}
        debug "Refreshing bib data..."
        url = "#{BIB_HOST}/api/get_summoned_books"
        res = Curl.get(url) do |http|
            payload = {:exp => Time.now.to_i + 60, :email => 'timetable'}
            http.headers['X-JWT'] = JWT.encode(payload, JWT_APPKEY_BIB, "HS256")
        end
        raise 'oops' if res.response_code != 200
        @@bib_summoned_books = JSON.parse(res.body)

        @@bib_unconfirmed_books = {}
        url = "#{BIB_HOST}/api/get_unconfirmed_books"
        res = Curl.get(url) do |http|
            payload = {:exp => Time.now.to_i + 60, :email => 'timetable'}
            http.headers['X-JWT'] = JWT.encode(payload, JWT_APPKEY_BIB, "HS256")
        end
        raise 'oops' if res.response_code != 200
        @@bib_unconfirmed_books = JSON.parse(res.body)
        # debug @@bib_summoned_books.to_yaml
    rescue StandardError => e
        debug e
    end
end

.refresh_public_event_config ⇒ Object 



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# File 'src/ruby/include/public_event.rb', line 354

def self.refresh_public_event_config()
    @@public_event_config_timestamp ||= 0
    path = '/data/public_events/public_events.yaml'
    if DEVELOPMENT || @@public_event_config_timestamp < File.mtime(path).to_i
        debug "Reloading public event config from #{path}!"
        @@public_event_config = YAML.load(File.read(path))
        self.fix_public_event_config()
        @@public_event_config_timestamp = File.mtime(path).to_i
    end
end

.sms_gateway_ready? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'src/ruby/include/sms.rb', line 25

def self.sms_gateway_ready?
    (@@ws_clients[:authenticated_sms] || {}).values.size > 0
end

.stream_allowed_for_date_lesson_key_and_email(datum, lesson_key, email, restrictions = nil, is_homeschooling_user = nil, group2_for_email = nil) ⇒ Object 



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# File 'src/ruby/include/jitsi.rb', line 86

def self.stream_allowed_for_date_lesson_key_and_email(datum, lesson_key, email, restrictions = nil, is_homeschooling_user = nil, group2_for_email = nil)
    # temporarily disable all stream restrictions
    return true
    
    restrictions ||= Main.get_stream_restriction_for_lesson_key(lesson_key)
    weekday = (Date.parse(datum).wday + 6) % 7
    return true if restrictions[weekday] == 0
    user = @@user_info[email]
    return true if user.nil?
    return true if user[:teacher]
    klassenstufe = user[:klasse].to_i
    return true unless WECHSELUNTERRICHT_KLASSENSTUFEN.include?(klassenstufe)
    if restrictions[weekday] == 1
        if is_homeschooling_user.nil?
            return get_homeschooling_for_user_by_dauer_salzh(email)
        else
            return is_homeschooling_user
        end
    elsif restrictions[weekday] == 2
        return get_homeschooling_for_user(email, datum, is_homeschooling_user, group2_for_email)
    else
        true
    end
end

.tr_klasse(klasse) ⇒ Object 



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# File 'src/ruby/main.rb', line 473

def self.tr_klasse(klasse)
    KLASSEN_TR[klasse] || klasse
end

.update_antikenfahrt_groups ⇒ Object 



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# File 'src/ruby/include/directory.rb', line 346

def self.update_antikenfahrt_groups()
    results = $neo4j.neo4j_query(<<~END_OF_QUERY).map { |x| {:email => x['email'], :group_af => x['group_af'] }}
        MATCH (u:User)
        RETURN u.email AS email, COALESCE(u.group_af, '') AS group_af;
    END_OF_QUERY
    groups = {}
     = @@user_info
    results.each do |row|
        next unless ['gr', 'it'].include?(row[:group_af])
         = [row[:email]]
        next unless 
        next unless [:teacher] == false
        next unless ['11', '12'].include?([:klasse])
        groups[[:klasse]] ||= {}
        groups[[:klasse]][row[:group_af]] ||= []
        groups[[:klasse]][row[:group_af]] << row[:email]
    end
    @@antikenfahrt_recipients = {
        :recipients => {},
        :groups => []
    }
    @@antikenfahrt_mailing_lists = {}
    ['11', '12'].each do |klasse|
        ['gr', 'it'].each do |group_af|
            next if ((groups[klasse] || {})[group_af] || []).empty?
            @@antikenfahrt_recipients[:groups] << "/af/#{klasse}/#{group_af}/sus"
            @@antikenfahrt_recipients[:recipients]["/af/#{klasse}/#{group_af}/sus"] = {
                :label => "Antikenfahrt #{GROUP_AF_ICONS[group_af]} – SuS #{klasse}",
                :entries => groups[klasse][group_af]
            }
            @@antikenfahrt_recipients[:groups] << "/af/#{klasse}/#{group_af}/eltern"
            @@antikenfahrt_recipients[:recipients]["/af/#{klasse}/#{group_af}/eltern"] = {
                :label => "Antikenfahrt #{GROUP_AF_ICONS[group_af]} – Eltern #{klasse} (extern)",
                :external => true,
                :entries => groups[klasse][group_af].map { |x| 'eltern.' + x }
            }
            @@antikenfahrt_mailing_lists["antikenfahrt.#{group_af}.#{klasse}@#{SCHUL_MAIL_DOMAIN}"] = {
                :label => "Antikenfahrt #{GROUP_AF_ICONS[group_af]} – SuS Klassenstufe #{klasse}",
                :recipients => groups[klasse][group_af]
            }
            @@antikenfahrt_mailing_lists["antikenfahrt.#{group_af}.eltern.#{klasse}@#{SCHUL_MAIL_DOMAIN}"] = {
                :label => "Antikenfahrt #{GROUP_AF_ICONS[group_af]} – Eltern Klassenstufe #{klasse}",
                :recipients => groups[klasse][group_af].map { |x| 'eltern.' + x }
            }
        end
    end
end

.update_mailing_lists ⇒ Object 



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# File 'src/ruby/main.rb', line 1076

def self.update_mailing_lists()
    self.update_antikenfahrt_groups()
    @@mailing_lists = {}
    all_kl = Set.new()
    @@klassen_order.each do |klasse|
        next unless @@schueler_for_klasse.include?(klasse)
        @@mailing_lists["klasse.#{klasse}@#{SCHUL_MAIL_DOMAIN}"] = {
            :label => "SuS der Klasse #{tr_klasse(klasse)}",
            :recipients => @@schueler_for_klasse[klasse]
        }
        @@mailing_lists["eltern.#{klasse}@#{SCHUL_MAIL_DOMAIN}"] = {
            :label => "Eltern der Klasse #{tr_klasse(klasse)}",
            :recipients => @@schueler_for_klasse[klasse].map do |email|
                "eltern.#{email}"
            end
        }
        @@mailing_lists["lehrer.#{klasse}@#{SCHUL_MAIL_DOMAIN}"] = {
            :label => "Lehrer der Klasse #{tr_klasse(klasse)}",
            :recipients => ((@@teachers_for_klasse[klasse] || {}).keys.sort).map do |shorthand|
                email = @@shorthands[shorthand]
            end.reject do |email|
                email.nil?
            end
        }
        if klasse.to_i > 0
            if @@klassenleiter[klasse]
                @@mailing_lists["team.#{klasse.to_i}@#{SCHUL_MAIL_DOMAIN}"] ||= {
                    :label => "Klassenleiterteam der Klassenstufe #{klasse.to_i}",
                    :recipients => []
                }
                @@klassenleiter[klasse].each do |shorthand|
                    if @@shorthands[shorthand]
                        @@mailing_lists["team.#{klasse.to_i}@#{SCHUL_MAIL_DOMAIN}"][:recipients] << @@shorthands[shorthand]
                        all_kl << @@shorthands[shorthand]
                    end
                end
            end
        end
    end
    @@mailing_lists["lehrer@#{SCHUL_MAIL_DOMAIN}"] = {
        :label => "Gesamtes Kollegium",
        :recipients => @@user_info.keys.select do |email|
            @@user_info[email][:teacher] && @@user_info[email][:can_log_in] && email != 'vorstand.gev@gymnasiumsteglitz.de'
        end
    }
    @@mailing_lists["sus@#{SCHUL_MAIL_DOMAIN}"] = {
        :label => "Alle Schülerinnen und Schüler",
        :recipients => @@user_info.keys.select do |email|
            !@@user_info[email][:teacher]
        end
    }
    @@mailing_lists["eltern@#{SCHUL_MAIL_DOMAIN}"] = {
        :label => "Alle Eltern",
        :recipients => @@user_info.keys.select do |email|
            !@@user_info[email][:teacher]
        end.map do |email|
            "eltern.#{email}"
        end
    }
    temp = $neo4j.neo4j_query(<<~END_OF_QUERY).map { |x| { :email => x['u.email'] } }
        MATCH (u:User {ev: true})
        RETURN u.email;
    END_OF_QUERY
    @@mailing_lists["ev@#{SCHUL_MAIL_DOMAIN}"] = {
        :label => "Alle Elternvertreter:innen",
        :recipients => temp.map { |x| 'eltern.' + x[:email] }
    }
    @@mailing_lists["kl@#{SCHUL_MAIL_DOMAIN}"] = {
        :label => "Alle Klassenleiter:innen",
        :recipients => all_kl.to_a.sort
    }
    @@antikenfahrt_mailing_lists.each_pair do |k, v|
        @@mailing_lists[k] = v
    end
    if DEVELOPMENT
        VERTEILER_TEST_EMAILS.each do |email|
            @@mailing_lists[email] = {
                :label => "Dev-Verteiler #{email}",
                :recipients => VERTEILER_DEVELOPMENT_EMAILS
            }
        end
    end
    if DASHBOARD_SERVICE == 'ruby'
        File.open('/internal/mailing_lists.yaml.tmp', 'w') do |f|
            f.puts @@mailing_lists.to_yaml
        end
        FileUtils::mv('/internal/mailing_lists.yaml.tmp', '/internal/mailing_lists.yaml', force: true)
    end
end

.zeugnis_faecher_for_emails(emails) ⇒ Object 



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# File 'src/ruby/include/zeugnisse.rb', line 50

def self.zeugnis_faecher_for_emails(emails)
    zeugnis_keys = {}
    emails.each do |email|
        zeugnis_keys[self.zeugnis_key_for_email(email)] = true
    end
    faecher = []
    faecher_wf = []
    zeugnis_keys.keys.sort.each do |key|
        FAECHER_FOR_ZEUGNIS[ZEUGNIS_SCHULJAHR][ZEUGNIS_HALBJAHR][key].each do |fach|
            if fach[0] == '$'
                faecher_wf << fach unless faecher_wf.include?(fach)
            else
                faecher << fach unless faecher.include?(fach)
            end
        end
    end
    return faecher + faecher_wf
end

.zeugnis_key_for_email(email) ⇒ Object 



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# File 'src/ruby/include/zeugnisse.rb', line 44

def self.zeugnis_key_for_email(email)
    sesb = @@user_info[email][:sesb] || false
    klassenstufe = @@user_info[email][:klassenstufe]
    return "#{klassenstufe}#{sesb ? '_sesb': ''}"
end

Instance Method Details

#_include_file(name, label) ⇒ Object 



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# File 'src/ruby/include/website.rb', line 133

def _include_file(name, label)
    icon = ''
    if name[-4, 4] == '.pdf'
        icon = "<i class='file-type fa fa-file-pdf-o'></i>"
    elsif name[-4, 4] == '.doc' || name[-5, 5] == '.docx'
        icon = "<i class='file-type fa fa-file-word-o'></i>"
    elsif name[-4, 4] == '.xls' || name[-5, 5] == '.xlsx'
        icon = "<i class='file-type fa fa-file-excel-o'></i>"
    elsif name[-4, 4] == '.ppt' || name[-5, 5] == '.pptx'
        icon = "<i class='file-type fa fa-file-powerpoint-o'></i>"
    elsif name[-4, 4] == '.zip'
        icon = "<i class='file-type fa fa-file-zip-o'></i>"
    end
    "#{icon}<a href='https://#{WEBSITE_HOST}/f/#{name}' target='_blank'>#{label}</a>"
end

#_include_image(slug, mode = nil, caption = nil) ⇒ Object 



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# File 'src/ruby/include/website.rb', line 203

def _include_image(slug, mode = nil, caption = nil)
    mode = nil if (mode || '').empty?
    caption = nil if (caption|| '').empty?
    if mode.nil?
        StringIO.open do |io|
            io.puts "<div class='image'>"
#                 io.puts "<img src='https://#{WEBSITE_HOST}/gen/i/#{slug}-1024.jpg' />"
            io.puts _include_lazyload_image(slug)
            io.puts "<div class='caption'>#{caption}</div>" if caption
            io.puts "</div>"
            io.string
        end
    else
        StringIO.open do |io|
            width = mode[1]
            align = mode[0] == 'r' ? 'right' : 'left'
            io.puts "<div class='image iw-#{width} pull-#{align}'>"
#                 io.puts "<img src='https://#{WEBSITE_HOST}/gen/i/#{slug}-1024.jpg' />"
            io.puts _include_lazyload_image(slug, :cols => width.to_i)
            io.puts "<div class='caption'>#{caption}</div>" if caption
            io.puts "</div>"
            io.string
        end
#             "<img src='https://#{WEBSITE_HOST}/gen/i/#{slug}-1024.jpg' class='col-md-4 pull-left' />"
    end
end

#_include_lazyload_image(slug, options = {}) ⇒ Object 



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# File 'src/ruby/include/website.rb', line 180

def _include_lazyload_image(slug, options = {})
    dir = ''
    options[:x] ||= 50
    options[:y] ||= 50
    options[:classes] ||= []
    if options[:cols]
        options[:lg] ||= "#{(@@BOOTSTRAP_BREAKPOINTS[:lg].to_f * options[:cols] / 12 / 12 * 9).to_i}px"
        options[:md] ||= "#{(@@BOOTSTRAP_BREAKPOINTS[:md].to_f * options[:cols] / 12 / 12 * 9).to_i}px"
        options[:sm] ||= "#{(@@BOOTSTRAP_BREAKPOINTS[:sm].to_f * options[:cols] / 12 / 12 * 9).to_i}px"
        options[:xs] ||= "100vw"
    end
    StringIO.open do |io|
        io.puts "<picture>"
        ['webp', 'jpg'].each do |extension|
            mime_type = extension == 'webp' ? 'image/webp' : 'image/jpeg'
            io.puts "<source type='#{mime_type}' class='lazy' #{img_multi_attr_lazy(File.join("https://#{WEBSITE_HOST}/gen/i/#{slug}"), extension, options)} />"
        end
        io.puts "<img src='#{slug}-p.jpg' class='#{options[:classes].join(' ')}' style='object-position: #{options[:x]}% #{options[:y]}%' alt='#{options[:label]}' />"
        io.puts "</picture>"
        io.string
    end
end

#admin_2fa_hotline_logged_in? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 76

def admin_2fa_hotline_logged_in?
    admin_logged_in? && DATENTRESOR_HOTLINE_USERS.include?(@session_user[:email])
end

#admin_logged_in? ⇒ Boolean

Returns true if an admin is logged in.

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 68

def admin_logged_in?
    user_logged_in? && ADMIN_USERS.include?(@session_user[:email])
end

#advent_calendar_images ⇒ Object 



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# File 'src/ruby/main.rb', line 2289

def advent_calendar_images
    return [] unless File.exist?('advent-calendar-images.txt')
    File.read('advent-calendar-images.txt').split(/\s+/).map { |x| x.strip }.reject { |x| x.empty? }.map do |x|
        unless File.exist?("/gen/ac-#{x}.png")
            system("wget -O /gen/ac-#{x}-dl.png https://pixel.hackschule.de/raw/uploads/#{x}.png")
            system("convert /gen/ac-#{x}-dl.png -scale 1600% /gen/ac-#{x}.png")
        end
        "/gen/ac-#{x}.png"
    end
end

#advents_calendar_date_today ⇒ Object

returns 0 if before Dec 1 returns 1 .. 24 if in range returns 24 if Dec 25 .. 31



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# File 'src/ruby/main.rb', line 1656

def advents_calendar_date_today()
    date = DateTime.now.to_s[0, 10]
    # if DEVELOPMENT
        # date = '2021-12-24'
    # end
    return 0 if date < '2021-12-01'
    return 0 if date > '2021-12-31'
    day = date[8, 2].to_i
    day = 24 if day > 24
    return day
end

#all_sessions ⇒ Object 



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# File 'src/ruby/include/login.rb', line 280

def all_sessions
    sids = request.cookies['sid']
    users = []
    if (sids.is_a? String) && (sids =~ /^[0-9A-Za-z,]+$/)
        sids.split(',').each do |sid|
            if sid =~ /^[0-9A-Za-z]+$/
                results = neo4j_query(<<~END_OF_QUERY, :sid => sid).map { |x| {:sid => x['sid'], :email => x['email'] } }
                    MATCH (s:Session {sid: $sid})-[:BELONGS_TO]->(u:User)
                    RETURN s.sid AS sid, u.email AS email;
                END_OF_QUERY
                results.each do |entry|
                    if entry[:email] && @@user_info[entry[:email]]
                        users << {:sid => entry[:sid], :user => @@user_info[entry[:email]].dup, :method => entry[:method]}
                    end
                end
            end
        end
    end
    users
end

#already_booked_tablet_sets_for_day(datum) ⇒ Object

return all booked tablet sets for a specific day



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# File 'src/ruby/include/tablet_set.rb', line 68

def already_booked_tablet_sets_for_day(datum)
    require_user_who_can_manage_tablets_or_teacher!
    rows = neo4j_query(<<~END_OF_QUERY, { :datum => datum }).map { |x| {:tablet_set_id => x['t.id'], :lesson_key => x['l.key'], :start_time => x['b.start_time'], :end_time => x['b.end_time'], :email => x['u.email'] } }
        MATCH (t:TabletSet)<-[:BOOKED]-(b:Booking {datum: $datum})-[:BOOKED_BY]->(u:User)
        OPTIONAL MATCH (b)-[:FOR]->(i:LessonInfo)-[:BELONGS_TO]->(l:Lesson)
        RETURN t.id, l.key, b.start_time, b.end_time, u.email;
    END_OF_QUERY
    result = {}
    rows.each do |row|
        result[row[:tablet_set_id]] ||= []
        result[row[:tablet_set_id]] << {
            :lesson_key => row[:lesson_key],
            :email => row[:email],
            :display_name => (@@user_info[row[:email]] || {})[:display_last_name_dativ] || 'NN',
            :start_time => row[:start_time],
            :end_time => row[:end_time]
        }
    end
    result
end

#already_booked_tablet_sets_for_timespan(datum, start_time, end_time) ⇒ Object

check whether we can book a list of tablet sets for a specific time span



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# File 'src/ruby/include/tablet_set.rb', line 42

def already_booked_tablet_sets_for_timespan(datum, start_time, end_time)
    require_user_who_can_manage_tablets_or_teacher!
    data = {
        :datum => datum,
        :start_time => start_time,
        :end_time => end_time
    }
    rows = neo4j_query(<<~END_OF_QUERY, data).map { |x| {:tablet_set_id => x['t.id'], :lesson_key => x['l.key'], :email => x['u.email'] } }
        MATCH (t:TabletSet)<-[:BOOKED]-(b:Booking {datum: $datum})-[:BOOKED_BY]->(u:User)
        WHERE NOT ((b.end_time <= $start_time) OR (b.start_time >= $end_time))
        OPTIONAL MATCH (b)-[:FOR]->(i:LessonInfo)-[:BELONGS_TO]->(l:Lesson)
        RETURN t.id, l.key, u.email;
    END_OF_QUERY
    result = {}
    rows.each do |row|
        result[row[:tablet_set_id]] ||= []
        result[row[:tablet_set_id]] << {
            :lesson_key => row[:lesson_key],
            :email => row[:email],
            :display_name => (@@user_info[row[:email]] || {})[:display_last_name_dativ] || 'NN'
        }
    end
    result
end

#assert(condition, message = 'assertion failed', suppress_backtrace = false, delay = nil) ⇒ Object 



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# File 'src/ruby/main.rb', line 1338

def assert(condition, message = 'assertion failed', suppress_backtrace = false, delay = nil)
    unless condition
        debug_error message
        e = StandardError.new(message)
        e.set_backtrace([]) if suppress_backtrace
        sleep delay unless delay.nil?
        raise e
    end
end

#assert_with_delay(condition, message = 'assertion failed', suppress_backtrace = false) ⇒ Object 



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# File 'src/ruby/main.rb', line 1348

def assert_with_delay(condition, message = 'assertion failed', suppress_backtrace = false)
    assert(condition, message, suppress_backtrace, DEVELOPMENT ? 0.0 : 3.0)
end

#book_tablet_set_for_lesson(datum, start_time, end_time, tablet_sets = [], lesson_key, offset) ⇒ Object

book a list of tablet sets for a specific lesson, or unbook all tablet sets



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# File 'src/ruby/include/tablet_set.rb', line 90

def book_tablet_set_for_lesson(datum, start_time, end_time, tablet_sets = [], lesson_key, offset)
    require_user_who_can_manage_tablets_or_teacher!
    conflicting_tablets = []
    unless tablet_sets.empty?
        # check if it's bookable
        temp = already_booked_tablet_sets_for_timespan(datum, start_time, end_time)
        conflicting_tablets = temp.keys.reject do |x|
            temp[x].reject do |y|
                y[:lesson_key] == lesson_key
            end.empty?
        end
        conflicting_tablets.select! { |x| tablet_sets.include?(x) }
    end
    if conflicting_tablets.empty?
        transaction do
            # make sure tablet sets exist in database
            tablet_sets.each do |tablet_set_id|
                neo4j_query("MERGE (:TabletSet {id: '#{tablet_set_id}'})")
            end
            timestamp = Time.now.to_i
            data = {
                :email => @session_user[:email],
                :lesson_key => lesson_key,
                :offset => offset,
                :tablet_set_ids => tablet_sets,
                :timestamp => timestamp,
                :datum => datum,
                :start_time => start_time,
                :end_time => end_time
            }
            # create booking node
            neo4j_query(<<~END_OF_QUERY, data)
                MATCH (u:User {email: $email})
                MERGE (l:Lesson {key: $lesson_key})
                MERGE (i:LessonInfo {offset: $offset})-[:BELONGS_TO]->(l)
                MERGE (b:Booking)-[:FOR]->(i)
                MERGE (u)<-[:BOOKED_BY]-(b)
                SET i.updated = $timestamp
                SET b.updated = $timestamp
                SET b.datum = $datum
                SET b.start_time = $start_time
                SET b.end_time = $end_time

                WITH b
                MATCH (b)-[r:BOOKED]->(:TabletSet)
                DELETE r
            END_OF_QUERY
            # connect booked tablet sets to booking node
            neo4j_query(<<~END_OF_QUERY, data)
                MATCH (l:Lesson {key: $lesson_key})
                MATCH (i:LessonInfo {offset: $offset})-[:BELONGS_TO]->(l)
                MATCH (b:Booking)-[:FOR]->(i)
                MATCH (t:TabletSet)
                WHERE t.id IN $tablet_set_ids
                MERGE (b)-[:BOOKED]->(t)
            END_OF_QUERY
        end
    else
        debug "Cannot book tablet sets because of these:"
        debug conflicting_tablets.to_yaml
        raise :unable_to_book_tablet_sets
    end
end

#book_tablet_set_for_timespan(datum, start_time, end_time, tablet_sets) ⇒ Object

book a list of tablet sets for a specific lesson, or unbook all tablet sets



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# File 'src/ruby/include/tablet_set.rb', line 155

def book_tablet_set_for_timespan(datum, start_time, end_time, tablet_sets)
    require_user_who_can_manage_tablets!
    conflicting_tablets = []
    unless tablet_sets.empty?
        # check if it's bookable
        temp = already_booked_tablet_sets_for_timespan(datum, start_time, end_time)
        conflicting_tablets = temp.keys
        conflicting_tablets.select! { |x| tablet_sets.include?(x) }
    end
    if conflicting_tablets.empty?
        transaction do
            # make sure tablet sets exist in database
            tablet_sets.each do |tablet_set_id|
                neo4j_query("MERGE (:TabletSet {id: '#{tablet_set_id}'})")
            end
            timestamp = Time.now.to_i
            data = {
                :email => @session_user[:email],
                :tablet_set_ids => tablet_sets,
                :timestamp => timestamp,
                :datum => datum,
                :start_time => start_time,
                :end_time => end_time
            }
            # create booking node
            neo4j_query(<<~END_OF_QUERY, data)
                MATCH (u:User {email: $email})
                CREATE (u)<-[:BOOKED_BY]-(b:Booking {datum: $datum, start_time: $start_time, end_time: $end_time})
                SET b.updated = $timestamp

                WITH b
                MATCH (t:TabletSet)
                WHERE t.id IN $tablet_set_ids
                CREATE (b)-[:BOOKED]->(t)
            END_OF_QUERY
        end
    else
        debug "Cannot book tablet sets because of these:"
        debug conflicting_tablets.to_yaml
        raise :unable_to_book_tablet_sets
    end
end

#bytes_to_str(ai_Size) ⇒ Object 



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# File 'src/ruby/main.rb', line 1985

def bytes_to_str(ai_Size)
    if ai_Size < 1024
        return "#{ai_Size} B"
    elsif ai_Size < 1024 * 1024
        return "#{sprintf('%1.1f', ai_Size.to_f / 1024.0)} kB"
    elsif ai_Size < 1024 * 1024 * 1024
        return "#{sprintf('%1.1f', ai_Size.to_f / 1024.0 / 1024.0)} MB"
    elsif ai_Size < 1024 * 1024 * 1024 * 1024
        return "#{sprintf('%1.1f', ai_Size.to_f / 1024.0 / 1024.0 / 1024.0)} GB"
    end
    return "#{sprintf('%1.1f', ai_Size.to_f / 1024.0 / 1024.0 / 1024.0 / 1024.0)} TB"
end

#caesar(s, shift) ⇒ Object 



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# File 'src/ruby/include/cypher.rb', line 157

def caesar(s, shift)
    t = ''
    s.each_char do |c|
        code = c.upcase.ord
        if code >= 'A'.ord && code <= 'Z'.ord
            i = code - 'A'.ord
            i = (i + shift) % 26
            c = (i + 'A'.ord).chr
        end
        t += c
    end
    t
end

#can_checkout_books(email) ⇒ Object 



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# File 'src/ruby/include/lehrbuchverein.rb', line 42

def can_checkout_books(email)
    determine_lehrmittelverein_state_for_email(email) > 0
end

#can_manage_agr_app_logged_in? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 165

def can_manage_agr_app_logged_in?
    user_logged_in? && CAN_MANAGE_AGR_APP.include?(@session_user[:email])
end

#can_manage_bib_logged_in? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 169

def can_manage_bib_logged_in?
    flag = user_logged_in? && CAN_MANAGE_BIB.include?(@session_user[:email])
    if flag
        unless teacher_logged_in?
            unless device_logged_in?
                flag = false
            end
        end
    end
    flag
end

#can_manage_bib_members_logged_in? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 189

def can_manage_bib_members_logged_in?
    user_logged_in? && (CAN_MANAGE_BIB_MEMBERS.include?(@session_user[:email]))
end

#can_manage_bib_payment_logged_in? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 193

def can_manage_bib_payment_logged_in?
    user_logged_in? && (CAN_MANAGE_BIB_PAYMENT.include?(@session_user[:email]))
end

#can_manage_bib_special_access_logged_in? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 181

def can_manage_bib_special_access_logged_in?
    user_logged_in? && CAN_MANAGE_BIB_SPECIAL_ACCESS.include?(@session_user[:email])
end

#can_manage_salzh_logged_in? ⇒ Boolean

Returns true if a user who can see all timetables is logged in.

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 86

def can_manage_salzh_logged_in?
    user_logged_in? && (admin_logged_in? || @session_user[:can_manage_salzh])
end

#can_see_all_timetables_logged_in? ⇒ Boolean

Returns true if a user who can see all timetables is logged in.

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 81

def can_see_all_timetables_logged_in?
    user_logged_in? && (admin_logged_in? || @session_user[:can_see_all_timetables])
end

#check_has_technikamt(email) ⇒ Object 



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# File 'src/ruby/include/techpost.rb', line 3

def check_has_technikamt(email)
    results = neo4j_query(<<~END_OF_QUERY, :email => email)
        MATCH (u:User {email: $email})-[:HAS_AMT {amt: 'technikamt'}]->(v:Techpost)
        RETURN CASE WHEN EXISTS((u)-[:HAS_AMT {amt: 'technikamt'}]->(v)) THEN true ELSE false END AS hasRelation;
    END_OF_QUERY
    return results
end

#class_stream_link_for_session_user ⇒ Object 



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# File 'src/ruby/main.rb', line 1412

def class_stream_link_for_session_user
    require_user!
    if PROVIDE_CLASS_STREAM && (!@session_user[:teacher]) && (!['11', '12'].include?(@session_user[:klasse]))
        "/jitsi/Klassenstreaming#{@session_user[:klasse]}"
    else
        nil
    end
end

#color_palette_for_color_scheme(color_scheme) ⇒ Object 



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# File 'src/ruby/include/color.rb', line 115

def color_palette_for_color_scheme(color_scheme)
    primary_color = '#' + color_scheme[7, 6]
    light = luminance(primary_color) > 160
    primary_color_much_lighter = rgb_to_hex(mix(hex_to_rgb(desaturate(primary_color)), hex_to_rgb('#ffffff'), 0.8))
    primary_color_darker = darken(primary_color, 0.8)
    primary_color_much_darker = rgb_to_hex(mix(hex_to_rgb(desaturate(primary_color)), hex_to_rgb('#000000'), 0.5))
    desaturated_color = darken(desaturate(primary_color), 0.9)
    if light
        desaturated_color = rgb_to_hex(mix(hex_to_rgb(desaturate(primary_color)), hex_to_rgb('#ffffff'), 0.1))
    end
    desaturated_color_darker = darken(desaturate(primary_color), 0.3)
    disabled_color = light ? rgb_to_hex(mix(hex_to_rgb(primary_color), [255, 255, 255], 0.5)) : rgb_to_hex(mix(hex_to_rgb(primary_color), [192, 192, 192], 0.5))
    darker_color = rgb_to_hex(mix(hex_to_rgb(primary_color), [0, 0, 0], 0.6))
    shifted_color = shift_hue(primary_color, 350)
    main_text_color = light ? rgb_to_hex(mix(hex_to_rgb(primary_color), [0, 0, 0], 0.7)) : rgb_to_hex(mix(hex_to_rgb(primary_color), [255, 255, 255], 0.8))
    contrast_color = rgb_to_hex(mix(hex_to_rgb(primary_color), color_scheme[0] == 'l' ? [0, 0, 0] : [255, 255, 255], 0.7))
    color_palette = {
        :is_light => light,
        :primary => primary_color,
        :primary_color_much_lighter => primary_color_much_lighter,
        :primary_color_darker => primary_color_darker,
        :primary_color_much_darker => primary_color_much_darker,
        :disabled => disabled_color,
        :darker => darker_color,
        :shifted => desaturated_color,
        :left => '#' + color_scheme[1, 6],
        :right => '#' + color_scheme[13, 6],
        :main_text => main_text_color,
        :contrast => contrast_color
    }
    color_palette
end

#create_device_token(device, expire_hours) ⇒ Object 



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# File 'src/ruby/include/login.rb', line 34

def create_device_token(device, expire_hours)
    token = RandomTag::generate(24)
    assert(token =~ /^[0-9A-Za-z]+$/)
    data = {:device => device,
            :token => token,
            :expires => (DateTime.now() + expire_hours / 24.0).to_s}

    neo4j_query_expect_one(<<~END_OF_QUERY, :data => data)
        CREATE (t:DeviceToken $data)
        RETURN t;
    END_OF_QUERY
    token
end

#create_session(email, expire_hours) ⇒ Object 



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# File 'src/ruby/include/login.rb', line 5

def create_session(email, expire_hours)
    sid = RandomTag::generate(24)
    assert(sid =~ /^[0-9A-Za-z]+$/)
    data = {:sid => sid,
            :expires => (DateTime.now() + expire_hours / 24.0).to_s}
    begin
        ua = USER_AGENT_PARSER.parse(request.env['HTTP_USER_AGENT'])
        usa = "#{ua.family} #{ua.version.segments.first} (#{ua.os.family}"
        usa += " / #{ua.device.family}" if ua.device.family.downcase != 'other'
        usa += ')'
        data[:user_agent] = usa
    rescue
    end

    all_sessions().each do |session|
        other_sid = session[:sid]
        result = neo4j_query(<<~END_OF_QUERY, :email => email, :other_sid => other_sid).map { |x| x['sid'] }
            MATCH (s:Session {sid: $other_sid})-[:BELONGS_TO]->(u:User {email: $email})
            DETACH DELETE s;
        END_OF_QUERY
    end
    neo4j_query_expect_one(<<~END_OF_QUERY, :email => email, :data => data)
        MATCH (u:User {email: $email})
        CREATE (s:Session $data)-[:BELONGS_TO]->(u)
        RETURN s;
    END_OF_QUERY
    sid
end

#css_for_font(font) ⇒ Object 



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# File 'src/ruby/include/theme.rb', line 2

def css_for_font(font)
    if font == 'Alegreya'
        {'font-family' => 'AlegreyaSans', 'letter-spacing' => 'unset'}
    elsif font == 'Billy'
        {'font-family' => 'Billy', 'letter-spacing' => 'unset'}
    elsif font == 'Riffic'
        {'font-family' => 'Riffic', 'letter-spacing' => '0.05em'}
    else
        {'font-family' => 'Roboto', 'letter-spacing' => 'unset'}
    end
end

#current_jitsi_rooms ⇒ Object 



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# File 'src/ruby/include/jitsi.rb', line 428

def current_jitsi_rooms()
    @@current_jitsi_rooms ||= nil
    @@current_jitsi_rooms_timestamp ||= Time.now
    if @@current_jitsi_rooms.nil? || Time.now > @@current_jitsi_rooms_timestamp + 10
        @@current_jitsi_rooms_timestamp = Time.now
        begin
            debug "Refreshing Jitsi presence!"
            c = Curl::Easy.new(JITSI_ALL_ROOMS_URL)
            c.perform
            if c.status.to_i == 200
                @@current_jitsi_rooms = JSON.parse(c.body_str)['rooms']
            else
                @@current_jitsi_rooms = nil
            end
        rescue
            @@current_jitsi_rooms = nil
        end
    end
    return @@current_jitsi_rooms
end

#cypher_content ⇒ Object 



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# File 'src/ruby/include/cypher.rb', line 263

def cypher_content
    require_user!
    parts = request.env['REQUEST_PATH'].split('/')
    provided_password = (parts[2] || '').strip.downcase
    provided_password = nil if provided_password.empty?
    debug "provided: [#{provided_password}]"
    result = neo4j_query_expect_one(<<~END_OF_QUERY, {:email => @session_user[:email]})
        MATCH (u:User {email: $email})
        RETURN COALESCE(u.cypher_level, 0) AS cypher_level,
        u.cypher_seed AS cypher_seed,
        COALESCE(u.failed_cypher_tries, 0) AS failed_cypher_tries,
        COALESCE(u.cypher_name, '') AS cypher_name;
    END_OF_QUERY
    @cypher_level = result['cypher_level']
    @cypher_seed = result['cypher_seed']
    @cypher_name = result['cypher_name'].strip
    failed_cypher_tries = result['failed_cypher_tries']
    @tries_left = 3 - failed_cypher_tries
    if @cypher_level == 7
        @tries_left = 50 - failed_cypher_tries
    end
    if @cypher_seed.nil? || (@cypher_level == 0 && provided_password.nil?)
        @cypher_seed = Time.now.to_i
        result = neo4j_query(<<~END_OF_QUERY, {:email => @session_user[:email], :cypher_seed => @cypher_seed})
            MATCH (u:User {email: $email})
            SET u.cypher_seed = $cypher_seed;
        END_OF_QUERY
    end

    get_next_cypher_password()

    STDERR.puts "CYPHER // #{@session_user[:email]} // level: #{@cypher_level}, next password: #{@cypher_next_password}#{@cypher_next_password.nil? ? '(nil)':''}"

    unless provided_password.nil? || @cypher_next_password.nil?
        result = neo4j_query(<<~END_OF_QUERY, {:email => @session_user[:email], :cypher_provided => provided_password })
            MATCH (u:User {email: $email})
            SET u.cypher_provided = $cypher_provided;
        END_OF_QUERY
        if provided_password.downcase == @cypher_next_password.downcase
            @cypher_level += 1
            result = neo4j_query(<<~END_OF_QUERY, {:email => @session_user[:email], :cypher_level => @cypher_level})
                MATCH (u:User {email: $email})
                SET u.cypher_level = $cypher_level,
                u.failed_cypher_tries = 0
                REMOVE u.cypher_provided;
            END_OF_QUERY
        else
            result = neo4j_query(<<~END_OF_QUERY, {:email => @session_user[:email]})
                MATCH (u:User {email: $email})
                SET u.failed_cypher_tries = COALESCE(u.failed_cypher_tries, 0) + 1;
            END_OF_QUERY
            if @tries_left <= 1
                result = neo4j_query(<<~END_OF_QUERY, {:email => @session_user[:email]})
                    MATCH (u:User {email: $email})
                    SET u.cypher_level = 0, u.failed_cypher_tries = 0, u.cypher_name = ''
                    REMOVE u.cypher_provided;
                END_OF_QUERY
            end
        end
    end
    unless provided_password.nil?
        debug "REDIRECTING!"
        redirect "#{WEB_ROOT}/cyph3r", 302
    end

    get_next_cypher_password()

    StringIO.open do |io|
        # io.puts "<p style='text-align: left; margin-top: 0;'><b>#{@session_user[:first_name]}</b> &lt;#{@session_user[:email]}&gt;</p>"
        if @cypher_level == MAX_CYPHER_LEVEL
            # io.puts "<p style='float: right; margin-top: 0;'><a href='/hackers'>=&gt; Hall of Fame</a></p>"
            io.puts File.read('/static/cypher/hall_of_fame.html')
            result = neo4j_query(<<~END_OF_QUERY)
                MATCH (u:User)
                WHERE COALESCE(u.cypher_level, 0) > 0
                RETURN u.email, u.cypher_level, COALESCE(u.cypher_name, '') AS cypher_name
            END_OF_QUERY
            io.puts "<p>"
            io.puts "Bisher #{result.size == 1 ? 'hat' : 'haben'} <b>#{result.size} Code Cracker:in#{result.size == 1 ? '' : 'nen'}</b> versucht, die Aufgaben zu lösen."
            histogram = {}
            names = []
            result.each do |row|
                histogram[row['u.cypher_level']] ||= []
                histogram[row['u.cypher_level']] << row['u.email']
                names << row['cypher_name'] unless row['cypher_name'].strip.empty?
            end
            names.sort!
            parts = []
            histogram.keys.sort.each do |level|
                l = 'in der <b>Hall of Fame</b>'
                if level + 1 <= MAX_CYPHER_LEVEL
                    l = "in <b>Level #{level + 1}</b>"
                end
                parts << "<b>#{histogram[level].size} Person#{histogram[level].size == 1 ? '' : 'en'}</b> #{l}"
            end
            io.puts "Davon befinde#{histogram[histogram.keys.sort.first].size == 1 ? 't' : 'n'} sich #{join_with_sep(parts, ', ', ' und ')}."
            io.puts "</p>"
            io.puts "<hr style='margin-bottom: 15px;'/>"
            # io.puts "<p>"
            # io.puts "Hier kannst du festlegen, ob und wie du in der Hall of Fame erscheinen möchtest:"
            # io.puts "</p>"
            # io.puts "<hr />"
            possible_names = []
            possible_names << @session_user[:first_name]
            unless @session_user[:teacher]
                possible_names << "#{@session_user[:first_name]} (#{@session_user[:klasse]})"
            end
            possible_names << @session_user[:display_name]
            unless @session_user[:teacher]
                possible_names << "#{@session_user[:display_name]} (#{@session_user[:klasse]})"
            else
                possible_names << "#{@session_user[:display_last_name]}"
            end

            io.puts "<p style='text-align: left; margin-top: 0;'>"
            io.puts "<span class='name-pref' data-name=''>[#{@cypher_name == '' ? 'x': ' '}] Ich möchte <b>nicht</b> aufgelistet werden.</span><br />"
            possible_names.each do |name|
                io.puts "<span class='name-pref' data-name=\"#{name}\">[#{@cypher_name == name ? 'x': ' '}] Ich möchte als <b>»#{name}«</b> erscheinen.</span><br />"
            end
            io.puts "<span class='cypher-reset text-danger'>[!] Ich möchte meinen <b>Fortschritt löschen</b> und von vorn beginnen.</span>"
            io.puts "<span class='text-danger' id='cypher_reset_confirm' style='display: none;'><br />&nbsp;&nbsp;&nbsp;&nbsp;Bist du sicher? <span id='cypher_reset_confirm_yes'><b>[Ja]</b></span> <span id='cypher_reset_confirm_no'><b>[Nein]</b></span></span>"
            io.puts "</p>"
            io.puts "<h2><b>Hall of Fame</b></h2>"
            names.each do |name|
                io.puts "<p class='name'>#{name}</p>"
            end
            io.puts File.read('/static/cypher/hall_of_fame_foot.html')
        else
            io.puts File.read('/static/cypher/title.html').gsub('#{next_cypher_level}', (@cypher_level + 1).to_s)
            if failed_cypher_tries == 0
                if @cypher_level > 0
                    io.puts "<p><b>Gut gemacht!</b></p>"
                    io.puts "<hr />"
                end
            else
                if @cypher_level > 0
                    io.puts "<p class='text-danger'><b>Achtung!</b> Deine letzte Antwort war leider falsch. Du hast noch <b>#{@tries_left} Versuch#{@tries_left == 1 ? '' : 'e'}</b>, bevor du wieder von vorn beginnen musst.</p>"
                    io.puts "<hr />"
                else
                    io.puts "<p class='text-danger'><b>Achtung!</b> Deine letzte Antwort war leider falsch.</p>"
                    io.puts "<hr />"
                end
            end
            path = "/static/cypher/level_#{@cypher_level + 1}.html"
            if File.exist?(path)
                io.puts File.read(path)
            end
            io.puts File.read('/static/cypher/form.html')
        end
        io.string
    end
end

#darken(c, f = 0.2) ⇒ Object 



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# File 'src/ruby/include/color.rb', line 91

def darken(c, f = 0.2)
    hsv = rgb_to_hsv(hex_to_rgb(c))
    hsv[2] *= f
    rgb_to_hex(hsv_to_rgb(hsv))
end

#delete_audio_comment(tag) ⇒ Object 



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# File 'src/ruby/include/comment.rb', line 2

def delete_audio_comment(tag)
    require_teacher!
    if tag && tag.class == String && tag =~ /^[0-9a-zA-Z]+$/
        dir = tag[0, 2]
        filename = tag[2, tag.size - 2]
        ['.ogg', '.mp3'].each do |ext|
            path = "/raw/uploads/audio_comment/#{dir}/#{filename}#{ext}"
            if File.exist?(path)
                STDERR.puts "DELETING #{path}"
                FileUtils::rm_f(path)
            end
        end
    end
end

#delete_session_user_ical_link ⇒ Object 



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# File 'src/ruby/include/ical.rb', line 2

def delete_session_user_ical_link()
    require_user!
    result = neo4j_query(<<~END_OF_QUERY, :email => @session_user[:email]).map { |x| x['u.ical_token'] }
        MATCH (u:User {email: $email})
        WHERE EXISTS(u.ical_token)
        RETURN u.ical_token;
    END_OF_QUERY
    result.each do |token|
        path = "/gen/ical/#{token}.ics"
        STDERR.puts path
        if File.exist?(path)
            FileUtils.rm(path)
        end
    end
    result = neo4j_query(<<~END_OF_QUERY, :email => @session_user[:email])
        MATCH (u:User {email: $email})
        REMOVE u.ical_token;
    END_OF_QUERY
end

#delete_session_user_otp_token ⇒ Object 



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# File 'src/ruby/include/otp.rb', line 2

def delete_session_user_otp_token()
    require_user!
    result = neo4j_query(<<~END_OF_QUERY, :email => @session_user[:email])
        MATCH (u:User {email: $email})
        REMOVE u.otp_token
        REMOVE u.otp_token_changed
        REMOVE u.preferred_login_method;
    END_OF_QUERY
end

#desaturate(c) ⇒ Object 



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# File 'src/ruby/include/color.rb', line 78

def desaturate(c)
    hsv = rgb_to_hsv(hex_to_rgb(c))
    hsv[1] *= 0.7
    hsv[2] *= 0.9
    rgb_to_hex(hsv_to_rgb(hsv))
end

#determine_lehrmittelverein_state_for_email(email) ⇒ Object

returns bits 1 for paid, 2 for zahlungsbefreit, 4 for lehrmittelfreiheit



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# File 'src/ruby/include/lehrbuchverein.rb', line 26

def determine_lehrmittelverein_state_for_email(email)
    result = 0
    temp = neo4j_query(<<~END_OF_QUERY, {:email => email})
        MATCH (u:User {email: $email, lmv_no_pay: true})
        RETURN u.email;
    END_OF_QUERY
    result += 2 if temp.size > 0
    # result += 4 if [5, 6].include?(((@@user_info[email] || {})[:klasse] || '').to_i)
    temp = neo4j_query(<<~END_OF_QUERY, {:email => email, :jahr => LEHRBUCHVEREIN_JAHR})
        MATCH (u:User {email: $email})-[:PAID_FOR]->(j:Lehrbuchvereinsjahr {jahr: $jahr})
        RETURN u.email;
    END_OF_QUERY
    result += 1 if temp.size > 0
    return result
end

#device_logged_in? ⇒ Boolean

Returns true if a device is logged in.

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 101

def device_logged_in?
    !@session_device.nil?
end

#eval_lilypads(_content) ⇒ Object 



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# File 'src/ruby/include/website.rb', line 251

def eval_lilypads(_content)
    content = _content.dup
    while true
        index = content.index('#{')
        break if index.nil?
        length = 2
        balance = 1
        while index + length < content.size && balance > 0
            c = content[index + length]
            balance -= 1 if c == '}'
            balance += 1 if c == '{'
            length += 1
        end
        code = content[index + 2, length - 3]
        begin
            # STDERR.puts code
            content[index, length] = eval(code).to_s || ''
        rescue
            STDERR.puts "Error while evaluating:"
            STDERR.puts code
            raise
        end
    end
    content
end

#external_user_logged_in? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 197

def external_user_logged_in?
    user_logged_in? && (EXTERNAL_USERS.include?(@session_user[:email]))
end

#external_users_for_session_user ⇒ Object 



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# File 'src/ruby/include/ext_user.rb', line 2

def external_users_for_session_user
    result = {:groups => [], :recipients => {}, :order => []}
    return result unless user_who_can_manage_tablets_or_teacher_logged_in?
    # add pre-defined external users
    @@predefined_external_users[:groups].each do |x|
        result[:groups] << x
    end
    @@predefined_external_users[:recipients].each_pair do |k, v|
        result[:recipients][k] = v
    end
    
    # add external users from user's address book
    ext_users = neo4j_query(<<~END_OF_QUERY, :session_email => @session_user[:email]).map { |x| x['e'] }
        MATCH (u:User {email: $session_email})-[:ENTERED_EXT_USER]->(e:ExternalUser)
        RETURN e
        ORDER BY e.name
    END_OF_QUERY
    ext_users.each do |entry|
        result[:recipients][entry[:email]] = {:label => entry[:name]}
        result[:order] << entry[:email]
    end

    result
end

#fach_for_lesson_key(lesson_key) ⇒ Object 



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# File 'src/ruby/include/tablet_set.rb', line 203

def fach_for_lesson_key(lesson_key)
    (@@lessons[:lesson_keys][lesson_key] || {})[:pretty_folder_name] || 'NN'
end

#find_available_tablet_sets(datum, start_time, end_time, lesson_key = nil, offset = nil) ⇒ Object 



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# File 'src/ruby/include/tablet_set.rb', line 213

def find_available_tablet_sets(datum, start_time, end_time, lesson_key = nil, offset = nil)
    available_tablet_sets = []
    @@tablet_sets.keys.each do |tablet_id|
        available_tablet_sets << tablet_id
    end

    booked_tablet_sets_timespan = already_booked_tablet_sets_for_timespan(datum, start_time, end_time)
    booked_tablet_sets_day = already_booked_tablet_sets_for_day(datum)
    klasse5or6 = nil

    if lesson_key
        # consider klasse
        klassen = @@lessons[:lesson_keys][lesson_key][:klassen]
        klasse5or6 = klassen.any? { |x| [5, 6].include?(x.to_i) }

        # sort by :prio_unterstufe
        # available_tablet_sets.sort! do |a, b|
        #     a_prio = (!!@@tablet_sets[a][:prio_unterstufe]) ? 1 : 0
        #     b_prio = (!!@@tablet_sets[b][:prio_unterstufe]) ? 1 : 0
        #     dir = a_prio <=> b_prio
        #     if dir == 0
        #         a <=> b
        #     else
        #         dir * (klasse5or6 ? -1 : 1)
        #     end
        # end

        # also consider room
        begin
            timetable_date = @@lessons[:start_date_for_date][datum]
            wday = (Date.parse(datum).wday + 6) % 7
            raum = @@lessons[:timetables][timetable_date][lesson_key][:stunden][wday].values.first[:raum]
            available_tablet_sets.select! do |x|
                if @@tablet_sets[x][:only_these_rooms_strict]
                    if @@tablet_sets[x][:only_these_rooms]
                        @@tablet_sets[x][:only_these_rooms].include?(raum)
                    else
                        true
                    end
                else
                    true
                end
            end
        rescue StandardError => e
            debug("An error occured while trying to determine the room for a lesson: #{e}, ignoring the room now...")
        end
    end

    tablet_sets = {}
    available_tablet_sets.each do |x|
        blocked_by = booked_tablet_sets_timespan[x]
        if lesson_key
            if blocked_by
                blocked_by.reject! { |x| x[:lesson_key] == lesson_key}
            end
        end
        tablet_sets[x] = {
            :count => @@tablet_sets[x][:count],
            :standort => @@tablet_sets[x][:standort],
            :is_tablet_set => @@tablet_sets[x][:is_tablet_set],
            :label => @@tablet_sets[x][:label],
            :blocked_by => blocked_by
        }
        hints = []
        if booked_tablet_sets_timespan[x]
            booked_tablet_sets_timespan[x].to_a.each do |entry|
                if entry[:lesson_key]
                    pretty_fach = fach_for_lesson_key(entry[:lesson_key])
                    if @@tablet_sets[x][:is_tablet_set] == true
                        hints << "<span class='text-danger'><i class='fa fa-warning'></i></span>&nbsp;&nbsp;Dieser Tabletsatz wurde bereits von <b>#{entry[:display_name]}</b> gebucht#{entry[:lesson_key] ? ': ' + pretty_fach : ''}."
                    else
                        hints << "<span class='text-danger'><i class='fa fa-warning'></i></span>&nbsp;&nbsp;Dieses Gerät wurde bereits von <b>#{entry[:display_name]}</b> gebucht#{entry[:lesson_key] ? ': ' + pretty_fach : ''}."
                    end
                else
                    if @@tablet_sets[x][:is_tablet_set] == true
                        hints << "<span class='text-danger'><i class='fa fa-warning'></i></span>&nbsp;&nbsp;Dieser Tabletsatz wurde bereits von <b>#{entry[:display_name]}</b> gebucht."
                    else
                        hints << "<span class='text-danger'><i class='fa fa-warning'></i></span>&nbsp;&nbsp;Dieses Gerät wurde bereits von <b>#{entry[:display_name]}</b> gebucht."
                    end
                end
            end
        elsif booked_tablet_sets_day[x]
            bookings_before = []
            bookings_after = []
            booked_tablet_sets_day[x].each do |entry|
                if entry[:end_time] <= start_time
                    bookings_before << entry
                else
                    bookings_after << entry
                end
            end
            unless bookings_before.empty?
                booking = bookings_before.last
                t = hh_mm_to_i(start_time) - hh_mm_to_i(booking[:end_time])
                if t <= TABLET_SET_WARNING_BEFORE_MINUTES
                    pretty_fach = fach_for_lesson_key(booking[:lesson_key])
                    if @@tablet_sets[x][:is_tablet_set] == true
                        hints << "<span class='text-danger'><i class='fa fa-clock-o'></i></span>&nbsp;&nbsp;Dieser Tabletsatz wird bis #{t} Minuten vor Stundenbeginn noch von <b>#{booking[:display_name]}</b> benötigt#{booking[:lesson_key] ? ': ' + pretty_fach : ''}"
                    else
                        hints << "<span class='text-danger'><i class='fa fa-clock-o'></i></span>&nbsp;&nbsp;Dieses Gerät wird bis #{t} Minuten vor Stundenbeginn noch von <b>#{booking[:display_name]}</b> benötigt#{booking[:lesson_key] ? ': ' + pretty_fach : ''}"
                    end
                end
            end
            unless bookings_after.empty?
                booking = bookings_after.first
                t = hh_mm_to_i(booking[:start_time]) - hh_mm_to_i(end_time)
                if t <= TABLET_SET_WARNING_AFTER_MINUTES
                    pretty_fach = fach_for_lesson_key(booking[:lesson_key])
                    if @@tablet_sets[x][:is_tablet_set] == true
                        hints << "<span class='text-danger'><i class='fa fa-clock-o'></i></span>&nbsp;&nbsp;Dieser Tabletsatz wird bereits #{t} Minuten nach Stundenende von <b>#{booking[:display_name]}</b> benötigt#{booking[:lesson_key] ? ': ' + pretty_fach : ''}"
                    else
                        hints << "<span class='text-danger'><i class='fa fa-clock-o'></i></span>&nbsp;&nbsp;Dieses Gerät wird bereits #{t} Minuten nach Stundenende von <b>#{booking[:display_name]}</b> benötigt#{booking[:lesson_key] ? ': ' + pretty_fach : ''}"
                    end
                end
            end
        end
        if lesson_key && @@tablet_sets[x][:only_these_rooms]
            timetable_date = @@lessons[:start_date_for_date][datum]
            wday = (Date.parse(datum).wday + 6) % 7
            raum = nil
            begin
                raum = @@lessons[:timetables][timetable_date][lesson_key][:stunden][wday].values.first[:raum]
            rescue
            end
            if raum
                unless @@tablet_sets[x][:only_these_rooms].include?(raum)
                    hints << "<span class='text-danger'><i class='fa fa-warning'></i></span>&nbsp;&nbsp;Dieser Tabletsatz ist weit vom Raum #{raum} entfernt. Bitte wählen Sie deshalb – falls möglich – einen anderen Tabletsatz."
                end
            end
        end
        unless klasse5or6.nil?
            if klasse5or6 && !@@tablet_sets[x][:prio_unterstufe]
                hints << "<span class='text-danger'><i class='fa fa-warning'></i></span>&nbsp;&nbsp;Sie buchen einen Tabletsatz für eine Unterstufenklasse, dieser Tabletsatz ist allerdings für die Unterstufe nicht so leicht zu transportieren. Bitte wählen Sie deshalb – falls möglich – einen anderen Tabletsatz."
            elsif !klasse5or6 && @@tablet_sets[x][:prio_unterstufe]
                hints << "<span class='text-danger'><i class='fa fa-warning'></i></span>&nbsp;&nbsp;Sie buchen einen Tabletsatz für die Mittel- oder Oberstufe, dieser Tabletsatz ist allerdings für die Unterstufe besonders leicht zu transportieren. Bitte wählen Sie deshalb – falls möglich – einen anderen Tabletsatz."
            end
        end
        if hints.empty?
            if @@tablet_sets[x][:is_tablet_set] == true
                hints << "<span class='text-success'><i class='fa fa-check'></i></span>&nbsp;&nbsp;Dieser Tabletsatz ist eine gute Wahl für Ihre Unterrichtsstunde."
            end
        end
        if @@tablet_sets[x][:hint]
            hints << "<span class='text-info'><i class='fa fa-info-circle'></i></span>&nbsp;&nbsp;#{@@tablet_sets[x][:hint]}"
        end
        unless hints.empty?
            tablet_sets[x][:hint] = hints.join('<br />')
        end
    end
    return tablet_sets, available_tablet_sets
end

#finished_zeugniskonferenzen ⇒ Object 



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# File 'src/ruby/include/monitor.rb', line 173

def finished_zeugniskonferenzen
    sha1_list = neo4j_query(<<~END_OF_QUERY, {:t1 => Time.now.to_i}).map { |x| x['m.sha1'] }
        MATCH (m:MonitorZeugniskonferenzState)
        WHERE m.t1 IS NOT NULL
        RETURN m.sha1;
    END_OF_QUERY
    sha1_list = Set.new(sha1_list)
    result = []
    today = Date.today.strftime('%Y-%m-%d')
    (ZEUGNISKONFERENZEN[today] || []).each do |entry|
        sha1 = Digest::SHA1.hexdigest([today, entry].to_json)[0, 16]
        if sha1_list.include?(sha1)
            result << entry[0]
        end
    end
    result
end

#fix_images(s) ⇒ Object 



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# File 'src/ruby/include/website.rb', line 230

def fix_images(s)
    s.gsub(/image{[^}]+}/) do |x|
        m = x.match(/^image{([^}]+)}$/)
        parts = m[1].split(',')
        slug = parts[0].strip
        pos = (parts[1] || '').strip
        caption = nil
        if ['l3', 'l4', 'l5', 'l6', 'r3', 'r4', 'r5', 'r6'].include?(pos)
            caption = (parts[2, parts.size - 2] || []).join(',').strip
        else
            caption = (parts[1, parts.size - 1] || []).join(',').strip
            pos = nil
        end
        caption = (caption[1, caption.size - 2] || '').strip
        '#{' + "_include_image(\"#{slug}\", \"#{pos}\", \"#{caption.gsub('"', '\\"')}\")}"
    end.gsub(/file{[^}]+}{[^}]+}/) do |x|
        m = x.match(/^file{([^}]+)}{([^}]+)}$/)
        '#{_include_file("' + m[1] + '", "' + m[2] + '")}'
    end
end

#gen_jitsi_data(path) ⇒ Object 



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# File 'src/ruby/include/jitsi.rb', line 111

def gen_jitsi_data(path)
    ua = USER_AGENT_PARSER.parse(request.env['HTTP_USER_AGENT'])
    browser_icon = 'fa-microphone'
    browser_name = 'Browser'
    ['edge', 'firefox', 'chrome', 'safari', 'opera'].each do |x|
        if ua.family.downcase.include?(x)
            browser_icon = x
            browser_name = x.capitalize
        end
    end
    os_family = ua.os.family.downcase.gsub(/\s+/, '').strip
    result = {:html => "<p class='alert alert-danger'>Der Videochat konnte nicht gefunden werden.</p>"}
    room_name = nil
    can_enter_room = false
    eid = nil
    ext_name = nil
    begin
        presence_token = nil
        event_stream_jwt = nil
        if path == 'Lehrerzimmer'
            if teacher_logged_in?
                room_name = 'Lehrerzimmer'
                can_enter_room = true
                result[:html] = ''
                result[:html] += "<div class='alert alert-warning'><strong>Hinweis:</strong> Wenn Sie das Lehrerzimmer betreten, wird allen Kolleginnen und Kollegen über dem Stundenplan angezeigt, dass Sie momentan im Lehrerzimmer sind. Das Lehrerzimmer steht nicht nur Lehrkräften, sondern auch unseren Kolleg*innen aus dem Otium und dem Sekretariat zur Verfügung. Für Schülerinnen und Schüler ist der Zutritt nicht möglich.</div>"
            end
        elsif path[0, 6] == 'event/'
            result[:html] = ''
            # it's an event!
            parts = path.split('/')
            eid = parts[1]
            code = parts[2]
            invitation = nil
            organizer_email = nil
            event = nil
            data = neo4j_query_expect_one(<<~END_OF_QUERY, :eid => eid)
                MATCH (e:Event {id: $eid})-[:ORGANIZED_BY]->(ou:User)
                WHERE COALESCE(e.deleted, false) = false
                RETURN e, ou.email;
            END_OF_QUERY
            organizer_email = data['ou.email']
            event = data['e']
            room_name = room_name_for_event(event[:title], eid)
            
            if code
                # EVENT - EXTERNAL USER WITH CODE
                rows = neo4j_query(<<~END_OF_QUERY, :eid => eid)
                    MATCH (u)-[rt:IS_PARTICIPANT]->(e:Event {id: $eid})-[:ORGANIZED_BY]->(ou:User)
                    WHERE (u:ExternalUser OR u:PredefinedExternalUser) AND COALESCE(e.deleted, false) = false AND COALESCE(rt.deleted, false) = false
                    RETURN e, ou.email, u;
                END_OF_QUERY
                invitation = rows.select do |row|
                    row_code = Digest::SHA2.hexdigest(EXTERNAL_USER_EVENT_SCRAMBLER + row['e'][:id] + row['u'][:email]).to_i(16).to_s(36)[0, 8]
                    code == row_code
                end.first
                ext_name = invitation['u'][:name]
                event_stream_jwt = gen_jwt_for_stream(ext_name) if event[:stream]
            else
                # EVENT - INTERNAL USER
                require_user!
                begin
                    # EVENT - INTERNAL USER IS ORGANIZER
                    invitation = neo4j_query_expect_one(<<~END_OF_QUERY, :eid => eid, :email => @session_user[:email])
                        MATCH (e:Event {id: $eid})-[:ORGANIZED_BY]->(ou:User {email: $email})
                        WHERE COALESCE(e.deleted, false) = false
                        RETURN e, ou.email;
                    END_OF_QUERY
                rescue
                    # EVENT - INTERNAL USER IS INVITED
                    invitation = neo4j_query_expect_one(<<~END_OF_QUERY, :eid => eid, :email => @session_user[:email])
                        MATCH (u:User {email: $email})-[rt:IS_PARTICIPANT]->(e:Event {id: $eid})-[:ORGANIZED_BY]->(ou:User)
                        WHERE COALESCE(e.deleted, false) = false AND COALESCE(rt.deleted, false) = false
                        RETURN e, ou.email, u;
                    END_OF_QUERY
                end
                event_stream_jwt = gen_jwt_for_stream(@session_user[:display_name]) if event[:stream]
            end
            assert(invitation != nil)

            now = Time.now
            event_start = Time.parse("#{event[:date]}T#{event[:start_time]}")
            event_end = Time.parse("#{event[:date]}T#{event[:end_time]}")
            result[:html] += "<b class='key'>Termin:</b>#{event[:title]}<br />\n"
            result[:html] += "<b class='key'>Eingeladen von:</b>#{(@@user_info[organizer_email] || {})[:display_name]}<br />\n"
            event_date = Date.parse(event[:date])
            result[:html] += "<b class='key'>Datum:</b>#{WEEKDAYS[event_date.wday]}, #{event_date.strftime('%d.%m.%Y')}<br />\n"
            result[:html] += "<b class='key'>Zeit:</b>#{event[:start_time]} &ndash; #{event[:end_time]} Uhr<br />\n"
            if now < event_start - JITSI_EVENT_PRE_ENTRY_TOLERANCE * 60
                result[:html] += "<div class='alert alert-warning'>Sie können den Raum erst #{JITSI_EVENT_PRE_ENTRY_TOLERANCE} Minuten vor Beginn betreten. Bitte laden Sie die Seite dann neu, um in den Raum zu gelangen.</div>"
                # room can't yet be entered (too early)
            elsif now > event_end + JITSI_EVENT_POST_ENTRY_TOLERANCE * 60
                # room can't be entered anymore (too late)
                result[:html] += "<div class='alert alert-danger'>Der Termin liegt in der Vergangenheit. Sie können den Videochat deshalb nicht mehr betreten.</div>"
            else
                can_enter_room = true
            end
            can_enter_room = true if admin_logged_in?
            result[:html] += "<hr />"
        else
            # it's a lesson, only allow between 07:00 and 18:00
            result[:html] = ''
            require_user!
            can_enter_room = true
            room_name = path
            if room_name.index('Klassenstream') == 0
                if (!@session_user[:teacher]) && (!Main.get_homeschooling_for_user(@session_user[:email])) && room_name.index('Klassenstream') == 0
                    result[:html] += "<div class='alert alert-danger'>Du bist momentan nicht für den Klassenstream freigeschaltet, da du in Gruppe #{@session_user[:group2]} eingeteilt bist und auch nicht als »zu Hause« markiert bist. Deine Klassenleiterin oder dein Klassenleiter kann dich freischalten.</div>"
                    can_enter_room = false
                end
                if can_enter_room
                    now_s = Time.now.strftime('%H:%M')
                    if now_s < '07:00' || now_s > '18:00'
                        result[:html] += "<div class='alert alert-warning'>Der #{PROVIDE_CLASS_STREAM ? 'Klassenstream' : 'Stream'} ist nur von 07:00 bis 18:00 Uhr geöffnet.</div>"
                        can_enter_room = false
                    end
                end
            else
                if teacher_tablet_logged_in?
                    ext_name = path.split('@')[1]
                    ext_name = URI.decode_www_form(ext_name).first.first
                    path = path.split('@')[0]
                end
                if kurs_tablet_logged_in?
                    ext_name = 'Kursraum'
                    path = path.split('@')[0]
                end
                timetable_id = @session_user[:id]
                if @session_user[:is_tablet]
                    tablet_id = @session_user[:tablet_id]
                    if (@@tablets[tablet_id] || {})[:school_streaming]
                        # determine teacher who has booked the tablet now
                        today = DateTime.now.strftime('%Y-%m-%d')
                        results = neo4j_query(<<~END_OF_QUERY, {:tablet_id => tablet_id, :today => today})
                            MATCH (t:Tablet {id: $tablet_id})<-[:WHICH]-(b:Booking {datum: $today, confirmed: true})-[:FOR]->(i:LessonInfo)-[:BELONGS_TO]->(l:Lesson)
                            RETURN b, i, l
                        END_OF_QUERY
                        now = DateTime.now.strftime('%Y-%m-%dT%H:%M')
                        found_teachers = Set.new()
                        results.each do |item|
                            booking = item['b']
                            lesson = item['l']
                            lesson_key = lesson[:key]
                            lesson_info = item['i']
                            lesson_data = @@lessons[:lesson_keys][lesson_key]
                            start_time = "#{booking[:datum]}T#{booking[:start_time]}"
                            end_time = "#{booking[:datum]}T#{booking[:end_time]}"
                            start_time = (DateTime.parse("#{start_time}:00") - STREAMING_TABLET_BOOKING_TIME_PRE / 24.0 / 60.0).strftime('%Y-%m-%dT%H:%M')
                            end_time = (DateTime.parse("#{start_time}:00") + STREAMING_TABLET_BOOKING_TIME_POST / 24.0 / 60.0).strftime('%Y-%m-%dT%H:%M')
                            if now >= start_time && now <= end_time
                                found_teachers |= Set.new(lesson_data[:lehrer])
                            end
                        end
                        unless found_teachers.empty?
                            # force timetable_id to teacher who's currently running the lesson
                            timetable_id = @@user_info[@@shorthands[found_teachers.to_a.sort.first]][:id]
                        end
                    end
                end
                result[:html] = ''
                lesson_key = path.split('/')[1]
                if kurs_tablet_logged_in? || teacher_tablet_logged_in? || klassenraum_logged_in?
                    timetable_id = @@user_info[@@shorthands[@@lessons[:lesson_keys][lesson_key][:lehrer].first]][:id]
                end
                breakout_room_name = path.split('/')[2]
                # TODO: use code from get_jitsi_room_name_for_lesson_key
                p_ymd = Date.today.strftime('%Y-%m-%d')
                p_yw = Date.today.strftime('%Y-%V')
                assert(user_logged_in?)
                timetable_path = "/gen/w/#{timetable_id}/#{p_yw}.json.gz"
                timetable = nil
                # debug timetable_path
                Zlib::GzipReader.open(timetable_path) do |f|
                    timetable = JSON.parse(f.read)
                end
                assert(!(timetable.nil?))
                timetable = timetable['events'].select do |entry|
                    entry['lesson'] && 
                            entry['lesson_key'] == lesson_key && 
                            ((entry['datum'] == p_ymd) || DEVELOPMENT || admin_logged_in?) && 
                            (entry['data'] || {})['lesson_jitsi']
                end.sort { |a, b| a['start'] <=> b['start'] }
                now_time = Time.now
                old_timetable_size = timetable.size
                # unless admin_logged_in?
                    timetable = timetable.reject do |entry|
                        t = Time.parse("#{entry['end']}:00") + JITSI_LESSON_POST_ENTRY_TOLERANCE * 60
                        now_time > t
                    end
                # end
                if timetable.empty?
                    if old_timetable_size > 0
                        result[:html] += "<div class='alert alert-warning'>Dieser Jitsi-Raum ist heute nicht mehr geöffnet.</div>"
                    else
                        result[:html] += "<div class='alert alert-warning'>Dieser Jitsi-Raum ist heute nicht geöffnet.</div>"
                    end
                    if tablet_logged_in?
                        result[:html] += "<div class='alert alert-info'>Falls Sie Jitsi gerade erst aktiviert haben sollten, versuchen Sie bitte, die Seite neu zu laden, da es manchmal ein paar Sekunden dauern kann, bis der Raum tatsächlich aktiviert ist.</div>"
                    end
                    can_enter_room = false
                else
                    # check if we have streaming restrictions for this lesson
                    lesson_info = timetable.first

                    # debug lesson_info.to_yaml
                    
                    unless self.class.stream_allowed_for_date_lesson_key_and_email(Date.today.strftime('%Y-%m-%d'), lesson_info['lesson_key'], @session_user[:email])
                        result[:html] += "<div class='alert alert-info'>Du bist für diesen Jitsi-Raum leider nicht freigeschaltet.</div>"
                        can_enter_room = false
                    else
                        t = Time.parse("#{lesson_info['start']}:00") - JITSI_LESSON_PRE_ENTRY_TOLERANCE * 60
                        room_name = lesson_info['label_lehrer_lang'].gsub(/<[^>]+>/, '') + ' ' + lesson_info['klassen'].first.map { |x| tr_klasse(x) }.join(', ')
                        unless ((lesson_info['data'] || {})['breakout_rooms'] || []).empty?
                            if teacher_logged_in?
                                presence_token = RandomTag::generate(24)
                            else
                                # SuS is logged in, generate a presence token if we have roaming breakout rooms
                                if (lesson_info['data'] || {})['breakout_rooms_roaming']
                                    presence_token = RandomTag::generate(24)
                                end
                            end
                            if presence_token
                                query_data = {
                                    :token => presence_token, 
                                    :lesson_key => lesson_info['lesson_key'], 
                                    :offset => lesson_info['lesson_offset'], 
                                    :email => @session_user[:email], 
                                    :timestamp => (Time.now + PRESENCE_TOKEN_EXPIRY_TIME).to_i
                                }
                                if DEVELOPMENT
                                    debug "Generating presence token"
                                    debug query_data.to_yaml
                                end
                                neo4j_query_expect_one(<<~END_OF_QUERY, query_data)
                                    MATCH (u:User {email: $email}), (i:LessonInfo {offset: $offset})-[:BELONGS_TO]->(l:Lesson {key: $lesson_key})
                                    CREATE (n:PresenceToken {token: $token, expiry: $timestamp})
                                    CREATE (i)<-[:FOR]-(n)-[:BELONGS_TO]->(u)
                                    RETURN n;
                                END_OF_QUERY
                            end
                        end
                        if breakout_room_name
                            room_name += " #{breakout_room_name}"
                        end
                        if now_time >= t
                            can_enter_room = true
                        else
                            timediff = ((t - now_time).to_f / 60.0).ceil
                            tds = "#{timediff} Minute#{timediff == 1 ? '' : 'n'}"
                            tds = "#{timediff / 60} Stunde#{timediff / 60 == 1 ? '' : 'n'} und #{timediff % 60} Minute#{(timediff % 60) == 1 ? '' : 'n'}" if timediff > 60
                            if timediff == 1
                                tds = 'einer Minute'
                            elsif timediff == 2
                                tds = 'zwei Minuten'
                            elsif timediff == 3
                                tds = 'drei Minuten'
                            elsif timediff == 4
                                tds = 'vier Minuten'
                            elsif timediff == 5
                                tds = 'fünf Minuten'
                            end
                            result[:html] += "<div class='alert alert-warning'>Der Jitsi-Raum <strong>»#{room_name}«</strong> ist erst ab #{t.strftime('%H:%M')} Uhr geöffnet. Du kannst ihn in #{tds} betreten.</div>"
                            can_enter_room = false
                        end
                    end
                end
                room_name = CGI.unescape(room_name)
            end
        end
        if can_enter_room
            # room can be entered now
            if ext_name
                temp_name = ext_name.dup
                if teacher_tablet_logged_in?
                    temp_name = @@user_info[@@shorthands[ext_name]][:display_last_name]
                end
                result[:html] += "<p>Sie können dem Videochat jetzt als <b>#{temp_name}</b> beitreten.</p>\n"
            end
            result[:html] += "<div class='alert alert-secondary'>\n"
            result[:html] += "<p>Ich habe die <a href='/api/jitsi_terms'>Nutzerordnung</a> und die <a href='/api/jitsi_dse'>Datenschutzerklärung</a> zur Kenntnis genommen und willige ein.</p>\n"
            room_name = CGI.escape(remove_accents(room_name).gsub(/[\:\?#\[\]@!$&\\'()*+,;=><\/"]/, '')).gsub('+', '%20')
            jwt = gen_jwt_for_room(room_name, eid, ext_name)
            result[:html] += "<div class='go_div'>\n"
            # edge firefox chrome safari opera internet-explorer
            if os_family == 'ios' || os_family == 'macosx'
                result[:html] += "<a class='btn btn-success' href='org.jitsi.meet://#{JITSI_HOST}/#{room_name}?jwt=#{jwt}'><i class='fa fa-apple'></i>&nbsp;&nbsp;Jitsi-Raum mit Jitsi Meet betreten (iPhone und iPad)</a>"
                result[:html] += "<p style='font-size: 90%;'><em>Installieren Sie bitte die Jitsi Meet-App aus dem <a href='https://apps.apple.com/de/app/jitsi-meet/id1165103905' target='_blank'>App Store</a>.</em></p>"
                unless browser_icon == 'safari'
                    result[:html] += "<a class='btn btn-outline-secondary' href='https://#{JITSI_HOST}/#{room_name}?#{presence_token ? "presence_token=#{presence_token}&" : ''}jwt=#{jwt}'><i class='fa fa-#{browser_icon}'></i>&nbsp;&nbsp;Jitsi-Raum mit #{browser_name} betreten</a>"
                end
                if browser_icon == 'safari'
                    result[:html] += "<p style='font-size: 90%;'><em>Falls Sie einen Mac verwenden: Leider funktioniert Jitsi Meet nicht mit Safari. Verwenden Sie bitte einen anderen Web-Browser wie <a href='https://www.google.com/intl/de_de/chrome/' target='_blank'>Google Chrome</a> oder <a href='https://www.mozilla.org/de/firefox/new/' target='_blank'>Firefox</a>.</em></p>"
                end
            elsif os_family == 'android'
                result[:html] += "<a class='btn btn-success' href='intent://#{JITSI_HOST}/#{room_name}?jwt=#{jwt}#Intent;scheme=org.jitsi.meet;package=org.jitsi.meet;end'><i class='fa fa-microphone'></i>&nbsp;&nbsp;Jitsi-Raum mit Jitsi Meet für Android betreten</a>"
                result[:html] += "<p style='font-size: 90%;'><em>Installieren Sie bitte die Jitsi Meet-App aus dem <a href='https://play.google.com/store/apps/details?id=org.jitsi.meet' target='_blank'>Google Play Store</a> oder via <a href='https://f-droid.org/en/packages/org.jitsi.meet/' target='_blank' style=''>F&#8209;Droid</a>.</em></p>"
                result[:html] += "<a class='btn btn-outline-secondary' href='https://#{JITSI_HOST}/#{room_name}?#{presence_token ? "presence_token=#{presence_token}&" : ''}jwt=#{jwt}'><i class='fa fa-#{browser_icon}'></i>&nbsp;&nbsp;Jitsi-Raum mit #{browser_name} betreten</a>"
            else
                result[:html] += "<a class='btn btn-success' href='https://#{JITSI_HOST}/#{room_name}?#{presence_token ? "presence_token=#{presence_token}&" : ''}jwt=#{jwt}'><i class='fa fa-#{browser_icon}'></i>&nbsp;&nbsp;Jitsi-Raum mit #{browser_name} betreten</a>"
            end
            if event_stream_jwt
                result[:html] += "<div class='alert alert-warning'>"
                result[:html] += "<p>Falls Sie im Jitsi-Raum <strong>Verbindungsprobleme</strong> oder <strong>Zeitverzögerungen</strong> erleben sollten, probieren Sie bitte den Livestream, der für diesen Termin bereitgestellt wird. Sie finden dort einen Chat, über den Sie Wortmeldungen und Fragen senden können.</p>"
                result[:html] += "<a class='btn btn-warning' href='/livestream?jwt=#{event_stream_jwt}'><i class='fa fa-video-camera'></i>&nbsp;&nbsp;Zum Livestream…</a>"
                result[:html] += "</div>"
            end
            result[:html] += "</div>\n"
            result[:html] += "</div>\n"
        end
    rescue StandardError => e
        debug "gen_jitsi_data failed for path [#{path}]"
        debug e
        debug e.backtrace
        result = {:html => "<p class='alert alert-danger'>Der Videochat konnte nicht gefunden werden.</p>"}
    end
    result
end

#gen_jwt_for_room(room = '', eid = nil, user = nil, email = nil) ⇒ Object 



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# File 'src/ruby/include/jitsi.rb', line 13

def gen_jwt_for_room(room = '', eid = nil, user = nil, email = nil)
    payload = {
        :context => { :user => {}},
        :aud => JWT_APPAUD,
        :iss => JWT_APPISS,
        :sub => JWT_SUB,
        :room => room.strip,
        :exp => DateTime.parse("#{Time.now.strftime('%Y-%m-%d')} 00:00:00").to_time.to_i + 24 * 60 * 60,
        :moderator => teacher_logged_in?
    }
    payload[:context][:user][:name] = user if user
    payload[:context][:user][:email] = email if email
    if user_logged_in?
        use_user = @session_user
        # don't generate JWT if user is on negative list (/data/schueler/disable-jitsi.txt)
        if @@user_info[@session_user[:email]] && @@user_info[@session_user[:email]][:jitsi_disabled]
            raise 'no jitsi for you'
        end
        if teacher_tablet_logged_in?
            use_user = @@user_info[@@shorthands[user]]
        elsif kurs_tablet_logged_in?
            use_user = {:display_name => 'Kursraum'}
        elsif klassenraum_logged_in?
            use_user = {:display_name => 'Klassenraum'}
        elsif tablet_logged_in?
            if @@tablets[@session_user[:tablet_id]][:klassen_stream]
                use_user = {:display_name => "Klassenstreaming-Tablet #{@@tablets[@session_user[:tablet_id]][:klassen_stream]}"}
                payload[:moderator] = true
            else
                use_user = {:display_name => 'Tablet'}
            end
        end
        payload[:context][:user][:name] = use_user[:teacher] ? use_user[:display_last_name] : use_user[:display_name]
        payload[:context][:user][:email] = use_user[:email]
        payload[:context][:user][:avatar] = "#{NEXTCLOUD_URL}/index.php/avatar/#{use_user[:nc_login]}/128"
        if eid
            organizer_email = neo4j_query_expect_one(<<~END_OF_QUERY, :eid => eid, :session_email => use_user[:email])['ou.email']
                MATCH (e:Event {id: $eid})-[:ORGANIZED_BY]->(ou:User)
                WHERE COALESCE(e.deleted, false) = false
                RETURN ou.email;
            END_OF_QUERY
            payload[:moderator] = admin_logged_in? || (organizer_email == use_user[:email])
        end
    end
    assert(!(payload[:context][:user][:name].nil?))
    assert(payload[:context][:user][:name].strip.size > 0)
    assert(room.strip.size > 0)
    
    debug "Generated Jitsi token for #{payload[:context][:user][:name]} for #{payload[:room]}" if DEVELOPMENT || true
    
    token = JWT.encode payload, JWT_APPKEY, algorithm = 'HS256', header_fields = {:typ => 'JWT'}
    token
end

#gen_jwt_for_stream(name) ⇒ Object 



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# File 'src/ruby/include/jitsi.rb', line 67

def gen_jwt_for_stream(name)
    payload = {
        :context => { :user => { :name => name }},
        :aud => JWT_APPAUD_STREAM,
        :iss => JWT_APPISS,
        :sub => JWT_SUB,
        :exp => DateTime.parse("#{Time.now.strftime('%Y-%m-%d')} 00:00:00").to_time.to_i + 24 * 60 * 60
    }
    assert(!(payload[:context][:user][:name].nil?))
    assert(payload[:context][:user][:name].strip.size > 0)

    token = JWT.encode payload, JWT_APPKEY_STREAM, algorithm = 'HS256', header_fields = {:typ => 'JWT'}
    token
end

#gen_poll_data(path) ⇒ Object 



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# File 'src/ruby/include/poll.rb', line 940

def gen_poll_data(path)
    result = {}
    result[:html] = ''
    parts = path.sub('/poll/', '').split('/')
    prid = parts[0]
    code = parts[1]
    assert((prid.is_a? String) && (!code.empty?))
    assert((code.is_a? String) && (!code.empty?))
    rows = neo4j_query(<<~END_OF_QUERY, :prid => prid)
        MATCH (u)-[rt:IS_PARTICIPANT]->(pr:PollRun {id: $prid})-[:RUNS]->(p:Poll)-[:ORGANIZED_BY]->(ou:User)
        WHERE (u:ExternalUser OR u:PredefinedExternalUser) AND COALESCE(pr.deleted, false) = false AND COALESCE(rt.deleted, false) = false
        RETURN pr, ou.email, u, p;
    END_OF_QUERY
    invitation = rows.select do |row|
        row_code = Digest::SHA2.hexdigest(EXTERNAL_USER_EVENT_SCRAMBLER + row['pr'][:id] + row['u'][:email]).to_i(16).to_s(36)[0, 8]
        code == row_code
    end.first
    if invitation.nil?
        redirect "#{WEB_ROOT}/poll_not_found", 302
        return
    end
    ext_name = invitation['u'][:name]
    poll = invitation['p']
    poll_run = invitation['pr']
    now = "#{Date.today.strftime('%Y-%m-%d')}T#{Time.now.strftime('%H:%M')}:00"
    start_time = "#{poll_run[:start_date]}T#{poll_run[:start_time]}:00"
    end_time = "#{poll_run[:end_date]}T#{poll_run[:end_time]}:00"
    result[:organizer] = (@@user_info[invitation['ou.email']] || {})[:display_last_name]
    result[:organizer_icon] = user_icon(invitation['ou.email'], 'avatar-fill')
    result[:title] = poll[:title]
    result[:end_date] = poll_run[:end_date]
    result[:end_time] = poll_run[:end_time]
    result[:prid] = prid
    result[:code] = code
    result[:external_user_name] = ext_name
    if now < start_time
        result[:disable_launch_button] = true
        result[:html] += "Die Umfrage öffnet erst am"
        result[:html] += " #{Date.parse(poll_run[:start_date]).strftime('%d.%m.%Y')} um #{poll_run[:start_time]} Uhr (in <span class='moment-countdown' data-target-timestamp='#{poll_run[:start_date]}T#{poll_run[:start_time]}:00' data-before-label='' data-after-label=''></span>)."
    elsif now > end_time
        result[:disable_launch_button] = true
        result[:html] += "Die Umfrage ist bereits beendet."
    else
        result[:disable_launch_button] = false
        result[:html] += "Sie können noch bis zum #{Date.parse(poll_run[:end_date]).strftime('%d.%m.%Y')} um #{poll_run[:end_time]} Uhr teilnehmen (die Umfrage <span class='moment-countdown' data-target-timestamp='#{poll_run[:end_date]}T#{poll_run[:end_time]}:00' data-before-label='läuft noch' data-after-label='ist vorbei'></span>)."
    end
    result
end

#get_current_jitsi_users_for_lesson(lesson_key, offset, user = nil) ⇒ Object 



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# File 'src/ruby/include/jitsi.rb', line 481

def get_current_jitsi_users_for_lesson(lesson_key, offset, user = nil)
    lesson_info = neo4j_query_expect_one(<<~END_OF_QUERY, {:lesson_key => lesson_key, :offset => offset})['i']
        MATCH (i:LessonInfo {offset: $offset})-[:BELONGS_TO]->(l:Lesson {key: $lesson_key})
        RETURN i;
    END_OF_QUERY
    room_name = get_jitsi_room_name_for_lesson_key(lesson_key, user)
    assert(!(room_name.nil?), 'not today!', true)
    lesson_room_name = CGI.escape(room_name.gsub(/[\:\?#\[\]@!$&\\'()*+,;=><\/"]/, '')).gsub('+', '%20').downcase

    jitsi_rooms = current_jitsi_rooms()
    room_participants = []
    breakout_room_index = {}
    breakout_room_urls = []
    (lesson_info[:breakout_rooms] || []).each.with_index do |room_name, i|
        room_participants << []
        escaped_room_name = CGI.escape(room_name.gsub(/[\:\?#\[\]@!$&\\'()*+,;=><\/"]/, '')).gsub('+', '%20').downcase
        escaped_room_name = "#{lesson_room_name}%20#{escaped_room_name}"
        breakout_room_urls << escaped_room_name
        breakout_room_index[escaped_room_name] = {
            :room_name => room_name,
            :index => i
        }
    end
    lesson_room_participants = []
    present_sus = Set.new()
    if jitsi_rooms
        jitsi_rooms.each do |room|
            entry = breakout_room_index[room['roomName'].downcase]
            if entry
                room_participants[entry[:index]] = room['participants'].select do |x|
                    !((@@user_info[x['jwtEMail']] || {})[:teacher])
                end.map do |x|
                    present_sus << x['jwtEMail']
                    x['jwtName']
                end.sort.uniq
            end
            if room['roomName'].downcase == lesson_room_name
                lesson_room_participants = room['participants'].select do |x|
                    !((@@user_info[x['jwtEMail']] || {})[:teacher])
                end.map do |x|
                    present_sus << x['jwtEMail']
                    x['jwtName']
                end.sort.uniq
            end
        end
    end
    missing_sus = (Set.new((@@schueler_for_lesson[lesson_key] || [])) - present_sus).map do |email|
        @@user_info[email][:display_name]
    end.sort
    {:lesson_room => lesson_room_participants, 
     :breakout_rooms => room_participants, 
     :missing_sus => (@@user_info[user] || {})[:teacher] ? missing_sus : nil,
     :breakout_room_names => lesson_info[:breakout_rooms],
     :lesson_room_name => lesson_room_name,
     :breakout_room_index => breakout_room_index,
     :breakout_room_urls => breakout_room_urls}
end

#get_current_salzh_status ⇒ Object 



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# File 'src/ruby/include/salzh.rb', line 375

def get_current_salzh_status
    Main.get_current_salzh_status
end

#get_current_salzh_status_for_logged_in_teacher ⇒ Object 



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# File 'src/ruby/include/salzh.rb', line 379

def get_current_salzh_status_for_logged_in_teacher
    entries = get_current_salzh_status
    entries.select! do |entry|
        (@@schueler_for_teacher[@session_user[:shorthand]] || []).include?(entry[:email])
    end
    entries
end

#get_current_salzh_sus ⇒ Object 



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# File 'src/ruby/include/salzh.rb', line 299

def get_current_salzh_sus
    Main.get_current_salzh_sus
end

#get_current_user_sessions ⇒ Object 



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# File 'src/ruby/include/login.rb', line 514

def get_current_user_sessions()
    require_user!
    get_sessions_for_user(@session_user[:email])
end

#get_gradient(colors, t) ⇒ Object 



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# File 'src/ruby/include/color.rb', line 105

def get_gradient(colors, t)
    i = (t * (colors.size - 1)).to_i
    i = colors.size - 2 if i == colors.size - 1
    f = (t * (colors.size - 1)) - i
    f1 = 1.0 - f
    a = html_to_rgb(colors[i])
    b = html_to_rgb(colors[i + 1])
    rgb_to_html([a[0] * f1 + b[0] * f, a[1] * f1 + b[1] * f, a[2] * f1 + b[2] * f])
end

#get_gradients ⇒ Object 



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# File 'src/ruby/include/theme.rb', line 42

def get_gradients()
    results = neo4j_query(<<~END_OF_QUERY)
        MATCH (u:User) 
        WITH COALESCE(u.color_scheme, '#{@@standard_color_scheme}') AS scheme
        RETURN  scheme, count(scheme) AS count ORDER BY count DESC, scheme DESC;
    END_OF_QUERY
    histogram = {}
    results.each do |entry|
        entry['scheme'] ||= @@standard_color_scheme
        histogram[entry['scheme'][1, 18]] ||= 0
        histogram[entry['scheme'][1, 18]] += entry['count']
    end
    histogram_style = {}
    results.each do |entry|
        entry['scheme'] ||= @@standard_color_scheme
        style = (entry['scheme'][19] || '0').to_i
        histogram_style[style] ||= 0
        histogram_style[style] += entry['count']
    end
    color_schemes = @@color_scheme_colors.map do |x|
        paint_colors = x[0, 3].map do |c|
            rgb_to_hex(mix(hex_to_rgb(c), [255, 255, 255], 0.3))
        end
        [x[1], x[0, 3], paint_colors, x[3], x[4], x[5], histogram[x[0, 3].join('').gsub('#', '')], color_palette_for_color_scheme("l#{x[0, 3].join('').gsub('#', '')}")]
    end
    {:color_schemes => color_schemes,
     :style_histogram => histogram_style}
end

#get_ha_amt_lesson_keys ⇒ Object 



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# File 'src/ruby/include/lesson.rb', line 68

def get_ha_amt_lesson_keys()
    return [] unless user_logged_in?
    return [] if @session_user[:teacher]
    results = neo4j_query(<<~END_OF_QUERY, :email => @session_user[:email])
        MATCH (u:User {email: $email})-[r:HAS_AMT {amt: 'hausaufgaben'}]->(l:Lesson)
        RETURN l.key;
    END_OF_QUERY
    return results.map { |x| x['l.key'] }
end

#get_hotspot_klassen ⇒ Object 



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# File 'src/ruby/include/salzh.rb', line 255

def get_hotspot_klassen
    Main.get_hotspot_klassen
end

#get_jitsi_room_name_for_lesson_key(lesson_key, user = nil) ⇒ Object 



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# File 'src/ruby/include/jitsi.rb', line 449

def get_jitsi_room_name_for_lesson_key(lesson_key, user = nil)
    p_ymd = Date.today.strftime('%Y-%m-%d')
    p_yw = Date.today.strftime('%Y-%V')
    user_id = @@user_info[user || @session_user[:email]][:id]
    timetable_path = "/gen/w/#{user_id}/#{p_yw}.json.gz"
    timetable = nil
    Zlib::GzipReader.open(timetable_path) do |f|
        timetable = JSON.parse(f.read)
    end
    assert(!(timetable.nil?))
    timetable = timetable['events'].select do |entry|
        entry['lesson'] && 
                (entry['lesson_key'] == lesson_key) && 
                ((entry['datum'] == p_ymd) || DEVELOPMENT || (user && ADMIN_USERS.include?(user))) && 
                (entry['data'] || {})['lesson_jitsi']
    end.sort { |a, b| a['start'] <=> b['start'] }
    now_time = Time.now
    old_timetable_size = timetable.size
    unless (user && ADMIN_USERS.include?(user))
        timetable = timetable.reject do |entry|
            t = Time.parse("#{entry['end']}:00") + JITSI_LESSON_POST_ENTRY_TOLERANCE * 60
            now_time > t
        end
    end
    if timetable.empty?
        return nil
    else
        room_name = timetable.first['label_lehrer_lang'].gsub(/<[^>]+>/, '') + ' ' + timetable.first['klassen'].first.map { |x| tr_klasse(x) }.join(', ')
        return room_name
    end
end

#get_login_stats ⇒ Object 



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# File 'src/ruby/include/stats.rb', line 2

def 
     = {}
    LOGIN_STATS_D.each do |d|
         = neo4j_query(<<~END_OF_QUERY, :today => (Date.today - d).to_s)
            MATCH (u:User) WHERE EXISTS(u.last_access) AND u.last_access >= $today
            RETURN u.email;
        END_OF_QUERY
        .map { |x| x['u.email'] }.each do |email|
            [email] ||= {}
            [email][d] = true
        end
    end
     = {}
    @@klassen_order.each do |klasse|
        [klasse] = {:total => (@@schueler_for_klasse[klasse] || []).size, :count => {}}
    end
    teacher_count = 0
    sus_count = 0
    @@user_info.each_pair do |email, user|
        if user[:teacher]
            teacher_count += 1 
        else
            sus_count += 1 
        end
    end
    [:lehrer] = {:total => teacher_count, :count => {}}
    [:sus] = {:total => sus_count, :count => {}}
    .each_pair do |email, seen|
        user = @@user_info[email]
        next if user.nil?
        seen.keys.each do |d|
            if user[:teacher]
                [:lehrer][:count][d] ||= 0
                [:lehrer][:count][d] += 1
            else
                [:sus][:count][d] ||= 0
                [:sus][:count][d] += 1
                if [user[:klasse]]
                    [user[:klasse]][:count][d] ||= 0
                    [user[:klasse]][:count][d] += 1
                end
            end
        end
    end
    
end

#get_monitor_messages ⇒ Object 



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# File 'src/ruby/include/monitor.rb', line 5

def get_monitor_messages()
    data = {}
    if File.exist?(MONITOR_MESSAGE_PATH)
        data = JSON.parse(File.read(MONITOR_MESSAGE_PATH))
    end
    result = {
        :messages => [],
        :images => []
    }
    [:messages, :images].each do |key|
        (data[key.to_s] || '').split("\n").each do |line|
            line.strip!
            result[key] << line unless line.empty?
        end
    end
    result
end

#get_monitor_zeugniskonferenzen ⇒ Object 



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# File 'src/ruby/include/monitor.rb', line 120

def get_monitor_zeugniskonferenzen
    rows = neo4j_query(<<~END_OF_QUERY)
        MATCH (m:MonitorZeugniskonferenz)
        RETURN m.key, COALESCE(m.value, FALSE) AS value;
    END_OF_QUERY
    result = {}
    rows.each do |row|
        result[row['m.key']] = row['value']
    end
    result['flur'] ||= false
    result['lz'] ||= false
    result['sek'] ||= false
    result
end

#get_next_cypher_password ⇒ Object 



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# File 'src/ruby/include/cypher.rb', line 194

def get_next_cypher_password
    @cypher_next_password = nil
    srand(@cypher_seed)
    languages = CYPHER_LANGUAGES.shuffle
    if @cypher_level == 0
        lang = languages[@cypher_level]
        line = line_for_lang(lang)
        @cypher_next_password = lang
        @cypher_token = caesar(line, 3)
    elsif @cypher_level == 1
        lang = languages[@cypher_level]
        line = line_for_lang(lang)
        @cypher_next_password = lang
        @cypher_token = skytale(line, [3, 4, 5, 6].sample)
    elsif @cypher_level == 2
        lang = languages[@cypher_level]
        line = line_for_lang(lang)
        @cypher_next_password = lang
        @cypher_token = line
    elsif @cypher_level == 3
        lang = languages[@cypher_level]
        @cypher_next_password = lang
        @cypher_token = nil
    elsif @cypher_level == 4
        lang = languages[@cypher_level]
        @cypher_next_password = lang
        @cypher_token = nil
    elsif @cypher_level == 5
        lang = languages[@cypher_level]
        line = line_for_lang(lang)
        @cypher_next_password = lang
        @cypher_token = line
    elsif @cypher_level == 6
        lang = languages[@cypher_level]
        tag = Digest::SHA1.hexdigest("#{lang.downcase}-cypher").to_i(16).to_s(36)[0, 4]
        @cypher_next_password = lang
        @cypher_token = tag
    elsif @cypher_level == 7
        pin = (0..3).map { |x| rand(10).to_s }.join('')
        tag = ''
        provided_password = neo4j_query_expect_one(<<~END_OF_QUERY, {:email => @session_user[:email]})['provided']
            MATCH (u:User {email: $email})
            RETURN COALESCE(u.cypher_provided, '') AS provided;
        END_OF_QUERY
        srand(Time.now.to_i)
        provided_password = '    ' if provided_password.strip.empty?
        unless provided_password == '    '
            t = rand(5) + 1
            (0...4).each do |i|
                t += rand(10) + 55
                break unless provided_password[i] == pin[i]
            end
            tag = "Die Überprüfung der PIN dauerte #{t} µs."
        end
        @cypher_next_password = pin
        @cypher_token = tag
    elsif @cypher_level == 8
        lang = languages[@cypher_level]
        line = "Das naechste Loesungswort lautet #{lang}"
        @cypher_next_password = lang
        @cypher_token = line
    elsif @cypher_level == 9
        lang = languages[@cypher_level].upcase
        # line = line_for_lang(lang)
        @cypher_next_password = lang
        @cypher_token = nil
    end
end

#get_next_password ⇒ Object 



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# File 'src/ruby/include/hack.rb', line 94

def get_next_password
    @hack_next_password = nil
    srand(@hack_seed)
    if @hack_level == 0
        names = NAMES.shuffle
        @hack_next_password = names[@hack_level]
    elsif @hack_level == 1
        number = [1, 2].sample * 1000 + [1,2,3,4,5,6,7,8,9].sample * 100 + [1,2,3,4,5,6,7,8,9].sample * 10 + [1,2,3,4,5,6,7,8,9].sample
        @hack_next_password = number.to_roman.downcase
        @hack_token = "#{number}"
    elsif @hack_level == 2
        names = NAMES.shuffle
        @hack_next_password = names[@hack_level]
    elsif @hack_level == 3
        notes = [['C', 'Cis', 'D', 'Es', 'E', 'F', 'Fis', 'G', 'As', 'A', 'B', 'H'],
                 ['c', 'cis', 'd', 'es', 'e', 'f', 'fis', 'g', 'as', 'a', 'b', 'h']]

        index = (0...(notes[0].size)).to_a.sample
        mode = (0..1).to_a.sample
        available_indices = (0...(notes[0].size)).to_a
        a = (index + 0) % 12
        b = (index + ((mode == 0) ? 4 : 3)) % 12
        c = (index + 7) % 12
        available_indices.delete(a)
        available_indices.delete(b)
        available_indices.delete(c)
        available_indices.shuffle!
        x = available_indices.shift()
        y = available_indices.shift()
        z = available_indices.shift()

        chord = "#{notes[mode][index]}-#{mode == 0 ? 'Dur' : 'Moll'}"
        correct_note = [b, c].sample

        @hack_next_password = notes[1][correct_note]
        n0, n1, n2, n3 = *([correct_note, x, y, z].shuffle)
        @hack_description = "<span style='font-size: 150%;'><b>#{notes[1][n0]}</b>, <b>#{notes[1][n1]}</b>, <b>#{notes[1][n2]}</b> oder <b>#{notes[1][n3]}</b></span>"
        @hack_token = chord
    elsif @hack_level == 4
        names = NAMES.shuffle
        @hack_next_password = names[@hack_level]
    elsif @hack_level == 5
        space_events = SPACE_EVENTS.keys.shuffle
        date = space_events.first
        @hack_token = SPACE_EVENTS[date].first
        @hack_description = "#{SPACE_EVENTS[date][1].gsub('__DATE__', "<b>#{SPACE_EVENTS[date].first}</b>")} Wie viele Tage sind seitdem vergangen?"
        @hack_next_password = (Date.today - Date.parse(date)).to_i.to_s
    elsif @hack_level == 6
        ascii = '@#$%&*()[]{}'.split('').shuffle
        @hack_token = ascii.first
        @hack_next_password = sprintf('%02x', ascii.first.ord)
    elsif @hack_level == 7
        primes = PRIMES.shuffle
        ps = primes[0, 6]
        p = ps.sample
        @hack_token = ps.inject(1) { |_, x| _ * x } * p
        @hack_next_password = p.to_s
    elsif @hack_level == 8
        names = NAMES.shuffle
        @hack_next_password = names[@hack_level]
        response.headers['X-Dashboard-Hackers-Passwort'] = @hack_next_password
    elsif @hack_level == 9
        fruit = FRUIT.shuffle
        @hack_next_password = fruit.first
        @hack_token = Digest::MD5.hexdigest(@hack_next_password)
    end
    @hack_next_password
end

#get_omit_ical_types ⇒ Object 



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# File 'src/ruby/include/user.rb', line 470

def get_omit_ical_types
    types = neo4j_query_expect_one(<<~END_OF_QUERY, :email => @session_user[:email])['types']
        MATCH (u:User {email: $email})
        RETURN COALESCE(u.omit_ical_types, []) AS types;
    END_OF_QUERY
    types
end

#get_open_doors_for_user ⇒ Object 



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# File 'src/ruby/main.rb', line 2280

def get_open_doors_for_user()
    require_user!
    doors = neo4j_query_expect_one(<<~END_OF_QUERY, :email => @session_user[:email])['doors']
        MATCH (u:User {email: $email})
        RETURN COALESCE(u.advent_calendar_doors, 0) AS doors;
    END_OF_QUERY
    doors
end

#get_poll_run(prid, external_code = nil) ⇒ Object 



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# File 'src/ruby/include/poll.rb', line 4

def get_poll_run(prid, external_code = nil)
    result = {}
    if external_code && !external_code.empty?
        rows = neo4j_query(<<~END_OF_QUERY, :prid => prid)
            MATCH (u)-[rt:IS_PARTICIPANT]->(pr:PollRun {id: $prid})-[:RUNS]->(p:Poll)-[:ORGANIZED_BY]->(au:User)
            WHERE (u:ExternalUser OR u:PredefinedExternalUser) AND COALESCE(p.deleted, false) = false AND COALESCE(pr.deleted, false) = false AND COALESCE(rt.deleted, false) = false
            RETURN u.email, pr.id, ID(u) AS unid, ID(pr) AS prnid;
        END_OF_QUERY
        invitation = rows.select do |row|
            row_code = Digest::SHA2.hexdigest(EXTERNAL_USER_EVENT_SCRAMBLER + row['pr.id'] + row['u.email']).to_i(16).to_s(36)[0, 8]
            external_code == row_code
        end.first
        assert(!(invitation.nil?))
        result = neo4j_query_expect_one(<<~END_OF_QUERY, :prid => prid, :email => invitation['u.email'], :unid => invitation['unid'], :prnid => invitation['prnid'])
            MATCH (u)-[rt:IS_PARTICIPANT]->(pr:PollRun {id: $prid})-[:RUNS]->(p:Poll)-[:ORGANIZED_BY]->(au:User)
            WHERE ID(u) = $unid AND ID(pr) = $prnid
            MATCH (ou)-[rt2:IS_PARTICIPANT]->(pr2:PollRun {id: $prid})-[:RUNS]->(p2:Poll)-[:ORGANIZED_BY]->(au2:User)
            WHERE COALESCE(rt2.deleted, false) = false
            RETURN u, pr, p, au.email, COUNT(ou) AS total_participants;
        END_OF_QUERY
    else
        require_user!
        result = neo4j_query_expect_one(<<~END_OF_QUERY, {:prid => prid, :email => @session_user[:email]})
            MATCH (u:User {email: $email})-[:IS_PARTICIPANT]->(pr:PollRun {id: $prid})-[:RUNS]->(p:Poll)-[:ORGANIZED_BY]->(au:User)
            WITH pr, p, au
            MATCH (ou)-[rt2:IS_PARTICIPANT]->(pr2:PollRun {id: $prid})-[:RUNS]->(p2:Poll)-[:ORGANIZED_BY]->(au2:User)
            WHERE COALESCE(rt2.deleted, false) = false
            RETURN pr, p, au.email, COUNT(ou) AS total_participants
        END_OF_QUERY
    end
    poll = result['p']
    poll.delete(:items)
    poll_run = result['pr']
    poll_run[:items] = JSON.parse(poll_run[:items])
    return poll, poll_run, result['au.email'], result['total_participants']
end

#get_poll_run_results(prid) ⇒ Object 



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# File 'src/ruby/include/poll.rb', line 161

def get_poll_run_results(prid)
    require_teacher_or_sv!
    unless admin_logged_in?
        # make sure we have the right user unless an admin is logged in
        temp = neo4j_query_expect_one(<<~END_OF_QUERY, {:prid => prid, :email => @session_user[:email]})
            MATCH (pr:PollRun {id: $prid})-[:RUNS]->(p:Poll)-[:ORGANIZED_BY]->(au:User {email: $email})
            RETURN au.email;
        END_OF_QUERY
    end
    temp = neo4j_query_expect_one(<<~END_OF_QUERY, {:prid => prid})
        MATCH (pu)-[rt:IS_PARTICIPANT]->(pr:PollRun {id: $prid})-[:RUNS]->(p:Poll)-[:ORGANIZED_BY]->(au:User)
        WHERE COALESCE(p.deleted, false) = false
        AND COALESCE(pr.deleted, false) = false
        AND COALESCE(rt.deleted, false) = false
        RETURN au.email, pr, p, COUNT(pu) AS participant_count;
    END_OF_QUERY
    participants = neo4j_query(<<~END_OF_QUERY, {:prid => prid})
        MATCH (pu)-[rt:IS_PARTICIPANT]->(pr:PollRun {id: $prid})-[:RUNS]->(p:Poll)
        WHERE COALESCE(p.deleted, false) = false
        AND COALESCE(pr.deleted, false) = false
        AND COALESCE(rt.deleted, false) = false
        RETURN labels(pu), pu.email, pu.name
    END_OF_QUERY
    participants = Hash[participants.map do |x|
        [x['pu.email'], x['pu.name'] || (@@user_info[x['pu.email']] || {})[:display_name] || 'NN']
    end]
    poll = temp['p']
    poll_run = temp['pr']
    poll[:organizer] = (@@user_info[temp['au.email']] || {})[:display_last_name] || temp['au.email']
    poll_run[:items] = JSON.parse(poll_run[:items])
    poll_run[:participant_count] = temp['participant_count']
    poll_run[:participants] = participants
    responses = neo4j_query(<<~END_OF_QUERY, {:prid => prid}).map { |x| {:response => JSON.parse(x['prs.response']), :email => x['u.email']} }
        MATCH (u)<-[:RESPONSE_BY]-(prs:PollResponse)-[:RESPONSE_TO]->(pr:PollRun {id: $prid})-[:RUNS]->(p:Poll)
        WHERE (u:User OR u:ExternalUser OR u:PredefinedExternalUser)
        RETURN u.email, prs.response;
    END_OF_QUERY
    responses.sort! { |a, b| participants[a] <=> participants[b] }
    return poll, poll_run, responses
end

#get_sessions_for_user(email) ⇒ Object 



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# File 'src/ruby/include/login.rb', line 500

def get_sessions_for_user(email)
    require_user!
    sessions = neo4j_query(<<~END_OF_QUERY, :email => email).map { |x| x['s'] }
        MATCH (s:Session)-[:BELONGS_TO]->(u:User {email: $email})
        RETURN s
        ORDER BY s.last_access DESC;
    END_OF_QUERY
    sessions.map do |s|
        s[:scrambled_sid] = Digest::SHA2.hexdigest(SESSION_SCRAMBLER + s[:sid]).to_i(16).to_s(36)[0, 16]
        s[:method] ||= 'email'
        s
    end
end

#get_sign_ups_for_public_event(event_key) ⇒ Object 



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# File 'src/ruby/include/public_event.rb', line 82

def get_sign_ups_for_public_event(event_key)
    event = @@public_event_config.select { |x| x[:key] == event_key }.first
    assert(!event.nil?)
    tracks = []
    event[:rows].each do |_row|
        _row[:entries].each do |_entry|
            tracks << "#{event_key}/#{_entry[:key]}"
        end
    end

    entries = neo4j_query(<<~END_OF_QUERY, :tracks => tracks).map { |x| {:person => x['n'], :track => x['t.track']} }
        MATCH (n:PublicEventPerson)-[:SIGNED_UP_FOR]->(t:PublicEventTrack)
        WHERE t.track in $tracks
        RETURN t.track, n
        ORDER BY n.timestamp ASC;
    END_OF_QUERY
    result = {}
    entries.each do |entry|
        result[entry[:track].sub("#{event[:key]}/", '')] ||= []
        result[entry[:track].sub("#{event[:key]}/", '')] << entry[:person]
    end
    result
end

#get_technikamt ⇒ Object 



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# File 'src/ruby/include/techpost.rb', line 11

def get_technikamt
    results = neo4j_query(<<~END_OF_QUERY)
        MATCH (u:User)-[:HAS_AMT {amt: 'technikamt'}]->(v:Techpost)
        RETURN u.email;
    END_OF_QUERY
    debug results
    return results.map { |result| result["u.email"] }
end

#get_test_regime_html ⇒ Object 



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# File 'src/ruby/include/salzh.rb', line 826

def get_test_regime_html()
    StringIO.open do |io|
        [true, false].each do |regular_test_day|
            [true, false].each do |regular_test_required|
                [:salzh, :contact_person, :hotspot_klasse, nil].each do |status|
                    io.puts "<tr>"
                    io.puts "<td><span style='position: relative; top: -1px;' class='salzh-badge salzh-badge-big bg-#{SALZH_MODE_COLORS[status]}'><i class='fa #{SALZH_MODE_ICONS[status]}'></i></span>#{SALZH_MODE_LABEL[status] || '&ndash;'}</td>"
                    io.puts "<td>#{regular_test_required ? 'notwendig' : 'nicht notwendig'}</td>"
                    io.puts "<td>#{regular_test_day ? 'ja' : 'nein'}</td>"
                    label_type = Main.get_test_list_label_type(status, regular_test_required, regular_test_day)
                    if label_type == :enabled
                        io.puts "<td>Vorname Nachname</td>"
                    elsif label_type == :disabled
                        io.puts "<td style='color: #aaa;'>(Vorname Nachname)</td>"
                    elsif label_type == :strike
                        io.puts "<td><s style='color: #000;'>Vorname Nachname</s></td>"
                    else
                        io.puts "<td>???</td>"
                    end
                    io.puts "</tr>"
                end
            end
        end
        io.string
    end
end

#get_unread_messages(now) ⇒ Object 



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# File 'src/ruby/include/message.rb', line 116

def get_unread_messages(now)
    require_user!
    # don't show messages which are not at least 5 minutes old
    rows = neo4j_query(<<~END_OF_QUERY, :email => @session_user[:email], :now => now).map { |x| x['c.id'] }
        MATCH (c)-[ruc:TO]->(u:User {email: $email}) 
        WHERE ((c:TextComment AND EXISTS(c.comment)) OR 
                (c:AudioComment AND EXISTS(c.tag)) OR
                (c:Message AND EXISTS(c.id))) AND
                c.updated < $now AND COALESCE(ruc.seen, false) = false
        RETURN c.id
    END_OF_QUERY
    rows
end

#get_voluntary_testing_sus ⇒ Object 



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# File 'src/ruby/include/salzh.rb', line 339

def get_voluntary_testing_sus
    Main.get_voluntary_testing_sus
end

#gev_logged_in? ⇒ Boolean

Returns true if GEV is logged in.

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 96

def gev_logged_in?
    user_logged_in? && (GEV_USERS.include?(@session_user[:email]) || admin_logged_in?)
end

#good_bad_icon(flag) ⇒ Object 



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# File 'src/ruby/include/admin.rb', line 10

def good_bad_icon(flag)
    if flag == true
        "<i class='fa fa-check text-success'></i>"
    elsif flag == false
        "<i class='fa fa-warning text-danger'></i>"
    end
end

#hack_content ⇒ Object 



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# File 'src/ruby/include/hack.rb', line 163

def hack_content 
    require_user!
    parts = request.env['REQUEST_PATH'].split('/')
    provided_password = (parts[2] || '').strip.downcase
    provided_password = nil if provided_password.empty?
    result = neo4j_query_expect_one(<<~END_OF_QUERY, {:email => @session_user[:email]})
        MATCH (u:User {email: $email})
        RETURN COALESCE(u.hack_level, 0) AS hack_level, 
        u.hack_seed AS hack_seed,
        COALESCE(u.failed_tries, 0) AS failed_tries,
        COALESCE(u.hack_name, '') AS hack_name;
    END_OF_QUERY
    @hack_level = result['hack_level']
    @hack_seed = result['hack_seed']
    @hack_name = result['hack_name'].strip
    failed_tries = result['failed_tries']
    tries_left = 3 - failed_tries
    if @hack_seed.nil? || (@hack_level == 0 && provided_password.nil?)
        @hack_seed = Time.now.to_i
        result = neo4j_query(<<~END_OF_QUERY, {:email => @session_user[:email], :hack_seed => @hack_seed})
            MATCH (u:User {email: $email})
            SET u.hack_seed = $hack_seed;
        END_OF_QUERY
    end
    
    get_next_password()

    STDERR.puts "HACK // #{@session_user[:email]} // level: #{@hack_level}, next password: #{@hack_next_password}#{@hack_next_password.nil? ? '(nil)':''}"

    unless provided_password.nil? || @hack_next_password.nil?
        if provided_password.downcase == @hack_next_password.downcase
            @hack_level += 1
            result = neo4j_query(<<~END_OF_QUERY, {:email => @session_user[:email], :hack_level => @hack_level})
                MATCH (u:User {email: $email})
                SET u.hack_level = $hack_level,
                u.failed_tries = 0;
            END_OF_QUERY
        else
            result = neo4j_query(<<~END_OF_QUERY, {:email => @session_user[:email]})
                MATCH (u:User {email: $email})
                SET u.failed_tries = COALESCE(u.failed_tries, 0) + 1;
            END_OF_QUERY
            if tries_left <= 1
                result = neo4j_query(<<~END_OF_QUERY, {:email => @session_user[:email]})
                    MATCH (u:User {email: $email})
                    SET u.hack_level = 0, u.failed_tries = 0, u.hack_name = '';
                END_OF_QUERY
            end
        end
    end
    unless provided_password.nil?                
        redirect "#{WEB_ROOT}/h4ck", 302
    end

    get_next_password()

    StringIO.open do |io|
        # io.puts "<p style='text-align: left; margin-top: 0;'><b>#{@session_user[:first_name]}</b> &lt;#{@session_user[:email]}&gt;</p>"
        if @hack_level == MAX_HACK_LEVEL
            # io.puts "<p style='float: right; margin-top: 0;'><a href='/hackers'>=&gt; Hall of Fame</a></p>"
            io.puts File.read('/static/hack/hall_of_fame.html')
            result = neo4j_query(<<~END_OF_QUERY)
                MATCH (u:User)
                WHERE COALESCE(u.hack_level, 0) > 0
                RETURN u.email, u.hack_level, COALESCE(u.hack_name, '') AS hack_name
            END_OF_QUERY
            io.puts "<p>"
            io.puts "Bisher #{result.size == 1 ? 'hat' : 'haben'} <b>#{result.size} Hacker:in#{result.size == 1 ? '' : 'nen'}</b> versucht, die Aufgaben zu lösen."
            histogram = {}
            names = []
            result.each do |row|
                histogram[row['u.hack_level']] ||= []
                histogram[row['u.hack_level']] << row['u.email']
                names << row['hack_name'] unless row['hack_name'].strip.empty?
            end
            names.sort!
            parts = []
            histogram.keys.sort.each do |level|
                l = 'in der <b>Hall of Fame</b>'
                if level + 1 <= MAX_HACK_LEVEL
                    l = "in <b>Level #{level + 1}</b>"
                end
                parts << "<b>#{histogram[level].size} Person#{histogram[level].size == 1 ? '' : 'en'}</b> #{l}"
            end
            io.puts "Davon befinde#{histogram[histogram.keys.sort.first].size == 1 ? 't' : 'n'} sich #{join_with_sep(parts, ', ', ' und ')}."
            io.puts "</p>"
            io.puts "<hr style='margin-bottom: 15px;'/>"
            # io.puts "<p>"
            # io.puts "Hier kannst du festlegen, ob und wie du in der Hall of Fame erscheinen möchtest:"
            # io.puts "</p>"
            # io.puts "<hr />"
            possible_names = []
            possible_names << @session_user[:first_name]
            unless @session_user[:teacher]
                possible_names << "#{@session_user[:first_name]} (#{@session_user[:klasse]})"
            end
            possible_names << @session_user[:display_name]
            unless @session_user[:teacher]
                possible_names << "#{@session_user[:display_name]} (#{@session_user[:klasse]})"
            else
                possible_names << "#{@session_user[:display_last_name]}"
            end

            io.puts "<p style='text-align: left; margin-top: 0;'>"
            io.puts "<span class='name-pref' data-name=''>[#{@hack_name == '' ? 'x': ' '}] Ich möchte <b>nicht</b> aufgelistet werden.</span><br />"
            possible_names.each do |name|
                io.puts "<span class='name-pref' data-name=\"#{name}\">[#{@hack_name == name ? 'x': ' '}] Ich möchte als <b>»#{name}«</b> erscheinen.</span><br />"
            end
            io.puts "<span class='hack-reset text-danger'>[!] Ich möchte meinen <b>Fortschritt löschen</b> und von vorn beginnen.</span>"
            io.puts "<span class='text-danger' id='hack_reset_confirm' style='display: none;'><br />&nbsp;&nbsp;&nbsp;&nbsp;Bist du sicher? <span id='hack_reset_confirm_yes'><b>[Ja]</b></span> <span id='hack_reset_confirm_no'><b>[Nein]</b></span></span>"
            io.puts "</p>"
            io.puts "<h2><b>Hall of Fame</b></h2>"
            names.each do |name|
                io.puts "<p class='name'>#{name}</p>"
            end
            io.puts File.read('/static/hack/hall_of_fame_foot.html')
        else
            io.puts File.read('/static/hack/title.html').gsub('#{next_hack_level}', (@hack_level + 1).to_s)
            if failed_tries == 0
                if @hack_level > 0
                    io.puts "<p><b>Gut gemacht!</b></p>"
                    io.puts "<hr />"
                end
            else
                if @hack_level > 0
                    tries_left = 3 - failed_tries
                    io.puts "<p class='text-danger'><b>Achtung!</b> Deine letzte Antwort war leider falsch. Du hast noch <b>#{tries_left} Versuch#{tries_left == 1 ? '' : 'e'}</b>, bevor du wieder von vorn beginnen musst.</p>"
                    io.puts "<hr />"
                else
                    io.puts "<p class='text-danger'><b>Achtung!</b> Deine letzte Antwort war leider falsch.</p>"
                    io.puts "<hr />"
                end
            end
            path = "/static/hack/level_#{@hack_level + 1}.html"
            if File.exist?(path)
                io.puts File.read(path)
            end
            io.puts File.read('/static/hack/form.html')
        end
        io.string
    end
end

#hello ⇒ Object 



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# File 'src/ruby/pry.rb', line 6

def hello
    puts 'hello, world!'
end

#hex_to_rgb(c) ⇒ Object 



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# File 'src/ruby/include/color.rb', line 55

def hex_to_rgb(c)
    r = c[1, 2].downcase.to_i(16)
    g = c[3, 2].downcase.to_i(16)
    b = c[5, 2].downcase.to_i(16)
    [r, g, b]
end

#hh_mm_to_i(s) ⇒ Object 



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# File 'src/ruby/include/tablet_set.rb', line 198

def hh_mm_to_i(s)
    parts = s.split(':').map { |x| x.to_i }
    parts[0] * 60 + parts[1]
end

#hsv_to_rgb(c) ⇒ Object 



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# File 'src/ruby/include/color.rb', line 2

def hsv_to_rgb(c)
    h, s, v = c[0].to_f / 360, c[1].to_f / 100, c[2].to_f / 100
    h_i = (h * 6).to_i
    f = h * 6 - h_i
    p = v * (1 - s)
    q = v * (1 - f * s)
    t = v * (1 - (1 - f) * s)
    r, g, b = v, t, p if h_i == 0
    r, g, b = q, v, p if h_i == 1
    r, g, b = p, v, t if h_i == 2
    r, g, b = p, q, v if h_i == 3
    r, g, b = t, p, v if h_i == 4
    r, g, b = v, p, q if h_i == 5
    [(r * 255).to_i, (g * 255).to_i, (b * 255).to_i]
end

#html_to_rgb(x) ⇒ Object 



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# File 'src/ruby/include/color.rb', line 97

def html_to_rgb(x)
    [x[1, 2].to_i(16), x[3, 2].to_i(16), x[5, 2].to_i(16)]
end

#htmlentities(s) ⇒ Object 



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# File 'src/ruby/main.rb', line 1604

def htmlentities(s)
    @html_entities_coder ||= HTMLEntities.new
    @html_entities_coder.encode(s)
end

#img_multi_attr_lazy(path, extension, resolutions, lazy = true) ⇒ Object 



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# File 'src/ruby/include/website.rb', line 173

def img_multi_attr_lazy(path, extension, resolutions, lazy = true)
    h = img_multi_attr_lazy_hash(path, extension, resolutions, lazy)
    h.keys.map do |k|
        "#{k}='#{h[k]}'"
    end.join(' ')
end

#img_multi_attr_lazy_hash(path, extension, resolutions, lazy = true) ⇒ Object 



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# File 'src/ruby/include/website.rb', line 149

def img_multi_attr_lazy_hash(path, extension, resolutions, lazy = true)
    if resolutions[:cols]
        resolutions[:lg] ||= "#{(@@BOOTSTRAP_BREAKPOINTS[:lg].to_f * resolutions[:cols] / 12).to_i}px"
        resolutions[:md] ||= "#{(@@BOOTSTRAP_BREAKPOINTS[:md].to_f * resolutions[:cols] / 12).to_i}px"
        resolutions[:sm] ||= "#{(@@BOOTSTRAP_BREAKPOINTS[:sm].to_f * resolutions[:cols] / 12).to_i}px"
        resolutions[:xs] ||= "100vw"
    end
    srcset_entries = @@GEN_IMAGE_WIDTHS.map do |w|
        "#{path}-#{w}.#{extension} #{w}w"
    end
    sizes_entries = @@BOOTSTRAP_BREAKPOINTS.map do |key, min_width|
        entry = resolutions[key]
        [:xs, :sm, :md, :lg].each do |k|
            entry ||= resolutions[k]
        end
        entry ||= '100vw'
        "(min-width: #{min_width}px) #{entry}"
    end
    {
        'srcset' => srcset_entries.join(', '),
        'sizes' => sizes_entries.join(', ')
    }
end

#iterate_directory(which, first_key = :last_name, second_key = :first_name, &block) ⇒ Object 



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# File 'src/ruby/include/directory.rb', line 410

def iterate_directory(which, first_key = :last_name, second_key = :first_name, &block)
    email_list = @@schueler_for_klasse[which]
    if email_list.nil?
        # try lesson key
        email_list = @@schueler_for_lesson[which]
    end
    email_list ||= []
    (email_list).sort do |a, b|
        (@@user_info[a][first_key] == @@user_info[b][first_key]) ?
        (@@user_info[a][second_key] <=> @@user_info[b][second_key]) :
        (@@user_info[a][first_key] <=> @@user_info[b][first_key])
    end.each.with_index do |email, i|
        yield email, i
    end
end

#iterate_school_days(options = {}, &block) ⇒ Object 



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# File 'src/ruby/main.rb', line 435

def iterate_school_days(options = {}, &block)
    self.class.iterate_school_days(options, &block)
end

#klasse_for_sus ⇒ Object 



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# File 'src/ruby/include/user.rb', line 459

def klasse_for_sus
    require_user_who_can_manage_tablets_or_teacher!
    result = {}
    @@user_info.each_pair do |email, info|
        next if info[:teacher]
        next unless info[:klasse]
        result[email] = Main.tr_klasse(info[:klasse])
    end
    result
end

#klassen_for_session_user ⇒ Object 



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# File 'src/ruby/include/user.rb', line 416

def klassen_for_session_user()
    require_teacher!
    if can_see_all_timetables_logged_in?
        @@klassen_order.dup
    else
        klassen = []
        @@klassen_order.each do |klasse|
            next unless (@@klassen_for_shorthand[@session_user[:shorthand]] || Set.new()).include?(klasse)
            klassen << klasse
        end
        klassen
    end
end

#klassenleiter_for_klasse_logged_in?(klasse) ⇒ Boolean

Returns true if a klassenleiter for a given klasse is logged in.

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 136

def klassenleiter_for_klasse_logged_in?(klasse)
    return false unless @@klassenleiter[klasse]
    teacher_logged_in? && @@klassenleiter[klasse].include?(@session_user[:shorthand])
end

#klassenleiter_for_klasse_or_admin_logged_in?(klasse) ⇒ Boolean

Returns true if a klassenleiter for a given klasse is logged in.

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 142

def klassenleiter_for_klasse_or_admin_logged_in?(klasse)
    return false unless @@klassenleiter[klasse]
    admin_logged_in? || (teacher_logged_in? && @@klassenleiter[klasse].include?(@session_user[:shorthand]))
end

#klassenraum_logged_in? ⇒ Boolean

Returns true if a kurs tablet is logged in.

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 121

def klassenraum_logged_in?
    user_logged_in? && @session_user[:is_tablet] && @session_user[:tablet_type] == :klassenraum
end

#kurs_tablet_logged_in? ⇒ Boolean

Returns true if a kurs tablet is logged in.

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 116

def kurs_tablet_logged_in?
    user_logged_in? && @session_user[:is_tablet] && @session_user[:tablet_type] == :kurs
end

#lessons_for_session_user_and_klasse(klasse) ⇒ Object 



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# File 'src/ruby/include/user.rb', line 430

def lessons_for_session_user_and_klasse(klasse)
    require_teacher!
    faecher = Set.new()
    (@@lessons_for_shorthand[@session_user[:shorthand]] || []).each do |lesson_key|
        lesson_info = @@lessons[:lesson_keys][lesson_key]
        next unless lesson_info[:klassen].include?(klasse)
        faecher << lesson_info[:fach]
    end
    faecher = faecher.to_a.sort do |a, b|
        a = @@faecher[a] if @@faecher[a]
        b = @@faecher[b] if @@faecher[b]
        a <=> b
    end
    {:fach_order => faecher, :fach_tr => @@faecher}
end

#line_for_lang(lang) ⇒ Object 



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# File 'src/ruby/include/cypher.rb', line 184

def line_for_lang(lang)
    [
        "Das naechste Loesungswort lautet #{lang}",
        "Das Passwort lautet #{lang}",
        "Versuch es mal mit #{lang}",
        "Wenn du #{lang} eingibst dann sollte es klappen",
        "#{lang} ist das naechste Passwort"
    ].sample
end

#logout ⇒ Object 



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# File 'src/ruby/include/login.rb', line 342

def logout()
    sid = request.cookies['sid']
    if sid =~ /^[0-9A-Za-z,]+$/
        current_sid = sid.split(',').first
        if current_sid =~ /^[0-9A-Za-z]+$/
            result = neo4j_query(<<~END_OF_QUERY, :sid => current_sid)
                MATCH (s:Session {sid: $sid})
                DETACH DELETE s;
            END_OF_QUERY
        end
    end
    purge_missing_sessions()
end

#luminance(color) ⇒ Object 



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# File 'src/ruby/include/color.rb', line 62

def luminance(color) 
    r, g, b = hex_to_rgb(color)
    return r * 0.299 + g * 0.587 + b * 0.114
end

#mail_addresses_table(klasse) ⇒ Object 



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# File 'src/ruby/include/directory.rb', line 2

def mail_addresses_table(klasse)
    require_teacher!
    klassenleiter_logged_in = (@@klassenleiter[klasse] || []).include?(@session_user[:shorthand]) || admin_logged_in?
    all_homeschooling_users = Main.get_all_homeschooling_users()
    salzh_status = Main.get_salzh_status_for_emails(Main.class_variable_get(:@@schueler_for_klasse)[klasse] || [])
    StringIO.open do |io|
        io.puts "<div class='row'>"
        io.puts "<div class='col-md-12'>"
        # io.puts "<div class='alert alert-warning'>"
        # io.puts "Bitte überprüfen Sie die <strong>Gruppenzuordnung (A/B)</strong> und markieren Sie alle Kinder, die aus gesundheitlichen Gründen / Quarantäne nicht in die Schule kommen können, als <strong>»zu Hause«</strong>."
#             io.puts "Auf die Jitsi-Streams können momentan nur SuS zugreifen, die laut ihrer Gruppenzuordnung in der aktuellen Woche zu Hause sind oder explizit als »zu Hause« markiert sind."
        # io.puts "</div>"
        io.puts "<div class='pull-right' style='position: relative; top: 10px;'>"
        [:salzh, :contact_person, :hotspot_klasse].each do |status|
            salzh_label = "<span style='margin-left: 2em;'><span class='salzh-badge salzh-badge-big bg-#{SALZH_MODE_COLORS[status]}'><i class='fa #{SALZH_MODE_ICONS[status]}'></i></span>&nbsp;#{SALZH_MODE_LABEL[status]}</span>"
            io.puts salzh_label
        end
        io.puts "</div>"
        io.puts "<h3>Klasse #{tr_klasse(klasse)}</h3>"
        io.puts "<p>"
        io.puts "</p>"
        # <div style='max-width: 100%; overflow-x: auto;'>
        # <table class='table' style='width: unset; min-width: 100%;'>

        io.puts "<div class='table-responsive' style='max-width: 100%; overflow-x: auto;'>"
        io.puts "<table class='klassen_table table table-condensed table-striped narrow' style='width: unset; min-width: 100%;'>"
        io.puts "<thead>"
        io.puts "<tr>"
        io.puts "<th>Nr.</th>"
        io.puts "<th></th>"
        io.puts "<th>Name</th>"
        io.puts "<th>Vorname</th>"
        io.puts "<th>Geburtsdatum</th>"
        # io.puts "<th>Status</th>"
        # if can_manage_salzh_logged_in?
        #     io.puts "<th>Reguläre Testung</th>"
        #     io.puts "<th>Freiwilliges saLzH bis</th>"
        # end
        # if klassenleiter_logged_in
        #     io.puts "<th>Freiwillige Testung</th>"
        # end
        io.puts "<th>E-Mail-Adresse</th>"
        # io.puts "<th style='width: 140px;'>Homeschooling</th>"
        if ['11', '12'].include?(klasse)
            io.puts "<th>Antikenfahrt</th>"
        end
        io.puts "<th>A/B</th>"
        io.puts "<th>Letzter Zugriff</th>"
        io.puts "<th>Eltern-E-Mail-Adresse</th>"
        io.puts "</tr>"
        io.puts "</thead>"
        io.puts "<tbody>"
        results = neo4j_query(<<~END_OF_QUERY, :email_addresses => @@schueler_for_klasse[klasse])
            MATCH (u:User)
            WHERE u.email IN $email_addresses
            RETURN u.email, u.last_access, COALESCE(u.group2, 'A') AS group2, COALESCE(u.group_af, '') AS group_af;
        END_OF_QUERY
        last_access = {}
        group2_for_email = {}
        group_af_for_email = {}
        results.each do |x|
            last_access[x['u.email']] = x['u.last_access']
            group2_for_email[x['u.email']] = x['group2']
            group_af_for_email[x['u.email']] = x['group_af']
        end

        (@@schueler_for_klasse[klasse] || []).sort do |a, b|
            (@@user_info[a][:last_name] == @@user_info[b][:last_name]) ?
            (@@user_info[a][:first_name] <=> @@user_info[b][:first_name]) :
            (@@user_info[a][:last_name] <=> @@user_info[b][:last_name])
        end.each.with_index do |email, _|
            record = @@user_info[email]
            io.puts "<tr class='user_row' data-email='#{email}'>"
            io.puts "<td>#{_ + 1}.</td>"
            io.puts "<td>#{user_icon(email, 'avatar-md')}</td>"
            salzh_style = ''
            salzh_class = ''
            if salzh_status[email] && [:contact_person, :salzh].include?(salzh_status[email][:status])
                salzh_style = 'padding: 2px 4px; margin: -2px -4px; display: inline-block; border-radius: 4px;'
                salzh_class = "bg-#{SALZH_MODE_COLORS[(salzh_status[email] || {})[:status]]}"
            end
            io.puts "<td><div class='#{salzh_class}' style='#{salzh_style}'>#{record[:last_name]}</div></td>"
            io.puts "<td><div class='#{salzh_class}' style='#{salzh_style}'>#{record[:first_name]}</div></td>"
            io.puts "<td>#{Date.parse(record[:geburtstag]).strftime('%d.%m.%Y')}</td>"
            # salzh_label = ''
            # if salzh_status[email][:status]
            #     salzh_label = "<span class='salzh-badge salzh-badge-big bg-#{SALZH_MODE_COLORS[(salzh_status[email] || {})[:status]]}'><i class='fa #{SALZH_MODE_ICONS[(salzh_status[email] || {})[:status]]}'></i></span>&nbsp;&nbsp;bis #{Date.parse(salzh_status[email][:status_end_date]).strftime('%d.%m.')}"

            #     # salzh_label = "<div class='bg-#{SALZH_MODE_COLORS[(salzh_status[email] || {})[:status]]}' style='text-align: center; padding: 4px; margin: -4px; border-radius: 4px;'><i class='fa #{SALZH_MODE_ICONS[(salzh_status[email] || {})[:status]]}'></i>&nbsp;&nbsp;bis #{Date.parse(salzh_status[email][:status_end_date]).strftime('%d.%m.')}</div>"
            # end
            # io.puts "<td>#{salzh_label}</td>"
            # if can_manage_salzh_logged_in?
            #     io.puts "<td>"
            #     testing_required = salzh_status[email][:testing_required]
            #     if testing_required
            #         io.puts "<button class='btn btn-sm btn-success bu_toggle_testing_required'><i class='fa fa-check'></i>&nbsp;&nbsp;notwendig</button>"
            #     else
            #         io.puts "<button class='btn btn-sm btn-outline-secondary bu_toggle_testing_required'><i class='fa fa-times'></i>&nbsp;&nbsp;nicht notwendig</button>"
            #     end
            #     io.puts "</td>"

            #     io.puts "<td>"
            #     freiwillig_salzh = salzh_status[email][:freiwillig_salzh]
            #     io.puts "<div class='input-group'><input type='date' class='form-control ti_freiwillig_salzh' value='#{freiwillig_salzh}' /><div class='input-group-append'><button #{freiwillig_salzh.nil? ? 'disabled' : ''} class='btn #{freiwillig_salzh.nil? ? 'btn-outline-secondary' : 'btn-danger'} bu_delete_freiwillig_salzh'><i class='fa fa-trash'></i></button></div></div>"
            #     io.puts "</td>"
            # end
            # if klassenleiter_logged_in
            #     io.puts "<td>"
            #     voluntary_testing = salzh_status[email][:voluntary_testing]
            #     if voluntary_testing
            #         io.puts "<button class='btn btn-sm btn-success bu_toggle_voluntary_testing'><i class='fa fa-check'></i>&nbsp;&nbsp;nimmt teil</button>"
            #     else
            #         io.puts "<button class='btn btn-sm btn-outline-secondary bu_toggle_voluntary_testing'><i class='fa fa-times'></i>&nbsp;&nbsp;nimmt nicht teil</button>"
            #     end
            #     io.puts "</td>"
            # end
            io.puts "<td>"
            print_email_field(io, record[:email])
            io.puts "</td>"
            homeschooling_button_disabled = klassenleiter_logged_in ? '' : 'disabled'
            # if all_homeschooling_users.include?(email)
            #     io.puts "<td><button #{homeschooling_button_disabled} class='btn btn-info btn-xs btn-toggle-homeschooling' data-email='#{email}'><i class='fa fa-home'></i>&nbsp;&nbsp;zu Hause</button></td>"
            # else
            #     io.puts "<td><button #{homeschooling_button_disabled} class='btn btn-secondary btn-xs btn-toggle-homeschooling' data-email='#{email}'><i class='fa fa-building'></i>&nbsp;&nbsp;Präsenz</button></td>"
            # end
            if ['11', '12'].include?(klasse)
                io.puts "<td><div class='group-af-button #{user_who_can_manage_antikenfahrt_logged_in? ? '' : 'disabled'}' data-email='#{email}'>#{GROUP_AF_ICONS[group_af_for_email[email]]}</div></td>"
            end
            io.puts "<td><div class='group2-button group2-#{group2_for_email[email]}' data-email='#{email}'>#{group2_for_email[email]}</div></td>"
            la_label = 'noch nie angemeldet'
            today = Date.today.to_s
            if last_access[email]
                days = (Date.today - Date.parse(last_access[email])).to_i
                if days == 0
                    la_label = 'heute'
                elsif days == 1
                    la_label = 'gestern'
                elsif days == 2
                    la_label = 'vorgestern'
                elsif days == 3
                    la_label = 'vor 3 Tagen'
                elsif days == 4
                    la_label = 'vor 4 Tagen'
                elsif days == 5
                    la_label = 'vor 5 Tagen'
                elsif days == 6
                    la_label = 'vor 6 Tagen'
                elsif days < 14
                    la_label = 'vor 1 Woche'
                elsif days < 21
                    la_label = 'vor 2 Wochen'
                elsif days < 28
                    la_label = 'vor 3 Wochen'
                elsif days < 35
                    la_label = 'vor 4 Wochen'
                else
                    la_label = 'vor mehreren Wochen'
                end
            end
            io.puts "<td>#{la_label}</td>"
            io.puts "<td>"
            print_email_field(io, "eltern.#{record[:email]}")
            io.puts "</td>"
            io.puts "</tr>"
        end
        io.puts "<tr>"
        io.puts "<td colspan='3'></td>"
        io.puts "<td colspan='2'><b>E-Mail an die Klasse #{tr_klasse(klasse)}</b></td>"
        io.puts "<td></td>"
        io.puts "<td colspan='3'><b>E-Mail an alle Eltern der Klasse #{tr_klasse(klasse)}</b></td>"
        io.puts "</tr>"
        io.puts "<tr class='user_row'>"
        io.puts "<td colspan='3'></td>"
        io.puts "<td colspan='2'>"
        print_email_field(io, "klasse.#{klasse}@#{SCHUL_MAIL_DOMAIN}")
        io.puts "</td>"
        io.puts "<td></td>"
        io.puts "<td colspan='3'>"
        print_email_field(io, "eltern.#{klasse}@#{SCHUL_MAIL_DOMAIN}")
        io.puts "</td>"
        io.puts "</tr>"
        io.puts "</tbody>"
        io.puts "</table>"
        io.puts "</div>"
        io.puts "<a class='btn btn-primary' href='/show_login_codes/#{klasse}'><i class='fa fa-sign-in'></i>&nbsp;&nbsp;Live-Anmeldungen der Klasse zeigen</a>"
        # io.puts print_stream_restriction_table(klasse)
        io.puts "<hr style='margin: 3em 0;'/>"
        io.puts "<h3>Schülerlisten Klasse #{tr_klasse(klasse)}</h3>"
#             io.puts "<div style='text-align: center;'>"
        io.puts "<a href='/api/directory_xlsx/#{klasse}' class='btn btn-primary'><i class='fa fa-file-excel-o'></i>&nbsp;&nbsp;Excel-Tabelle herunterladen</a>"
        io.puts "<a href='/api/directory_timetex_pdf/by_last_name/#{klasse}' class='btn btn-primary'><i class='fa fa-file-pdf-o'></i>&nbsp;&nbsp;Timetex-PDF herunterladen</a>"
        io.puts "<a href='/api/directory_timetex_pdf/by_first_name/#{klasse}' class='btn btn-primary'><i class='fa fa-file-pdf-o'></i>&nbsp;&nbsp;Timetex-PDF herunterladen (nach Vornamen sortiert)</a>"
        io.puts "<a href='/api/directory_json/#{klasse}' class='btn btn-primary'><i class='fa fa-file-code-o'></i>&nbsp;&nbsp;JSON herunterladen</a>"
        io.puts "<hr style='margin: 3em 0;'/>"
        io.puts "<h3>Stundenpläne der Klasse #{tr_klasse(klasse)} zum Ausdrucken</h3>"
        io.puts "<a href='/api/get_timetable_pdf_for_klasse/#{klasse}' target='_blank' class='btn btn-primary'><i class='fa fa-file-pdf-o'></i>&nbsp;&nbsp;PDF herunterladen (#{@@schueler_for_klasse[klasse].size} Seiten)</a>"
        io.puts "<hr style='margin: 3em 0;'/>"
        io.puts "<h3>Lehrer der Klasse #{tr_klasse(klasse)}</h3>"
        io.puts "<div class='table-responsive'>"
        io.puts "<table class='table table-condensed table-striped narrow'>"
        io.puts "<thead>"
        io.puts "<tr>"
        io.puts "<th>Kürzel</th>"
        io.puts "<th>Name</th>"
        io.puts "<th>Fächer (Wochenstunden)</th>"
        io.puts "<th>E-Mail-Adresse</th>"
        io.puts "</tr>"
        io.puts "</thead>"
        io.puts "<tbody>"
        old_is_klassenleiter = true
        (@@teachers_for_klasse[klasse] || {}).keys.sort do |a, b|
            name_comp = begin
                @@user_info[@@shorthands[a]][:last_name] <=> @@user_info[@@shorthands[b]][:last_name]
            rescue
                a <=> b
            end

            a_kli = (@@klassenleiter[klasse] || []).index(a)
            b_kli = (@@klassenleiter[klasse] || []).index(b)
            
            if a_kli.nil?
                if b_kli.nil?
                    name_comp
                else
                    1
                end
            else
                if b_kli.nil?
                    -1
                else
                    a_kli <=> b_kli
                end
            end
        end.each do |shorthand|
            lehrer = @@user_info[@@shorthands[shorthand]]
            next if lehrer.nil?
            is_klassenleiter = (@@klassenleiter[klasse] || []).include?(shorthand)
            
            if old_is_klassenleiter && !is_klassenleiter
                io.puts "<tr class='sep user_row'>"
            else
                io.puts "<tr class='user_row'>"
            end
            old_is_klassenleiter = is_klassenleiter
            io.puts "<td>#{shorthand}#{is_klassenleiter ? ' (KL)' : ''}</td>"
#                 io.puts "<td>#{((lehrer[:titel] || '') + ' ' + (lehrer[:last_name] || shorthand)).strip}</td>"
            io.puts "<td>#{lehrer[:display_name] || ''}</td>"
            hours = @@teachers_for_klasse[klasse][shorthand].keys.sort do |a, b|
                @@teachers_for_klasse[klasse][shorthand][b] <=> @@teachers_for_klasse[klasse][shorthand][a]
            end.map do |x|
                fach = x.gsub('.', '')
                fach = @@faecher[fach] if @@faecher[fach]
                "#{fach} (#{@@teachers_for_klasse[klasse][shorthand][x]})"
            end.join(', ')
            io.puts "<td>#{hours}</td>"
            if lehrer.empty?
                io.puts "<td></td>"
            else
                io.puts "<td>"
                print_email_field(io, lehrer[:email])
                io.puts "</td>"
            end
            io.puts "</tr>"
        end
        io.puts "<tr>"
        io.puts "<td colspan='3'></td>"
        io.puts "<td><b>E-Mail an alle Lehrer/innen der Klasse #{tr_klasse(klasse)}</b></td>"
        io.puts "</tr>"
        io.puts "<tr class='user_row'>"
        io.puts "<td colspan='3'></td>"
        io.puts "<td>"
        print_email_field(io, "lehrer.#{klasse}@#{SCHUL_MAIL_DOMAIN}")
        io.puts "</td>"
        io.puts "</tr>"
        io.puts "</tbody>"
        io.puts "</table>"
        io.puts "</div>"
        io.puts "</div>"
        io.string
    end
end

#matrix_get(path, access_token = nil) ⇒ Object 



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# File 'src/ruby/include/matrix.rb', line 32

def matrix_get(path, access_token = nil)
    matrix_request(:get, path, nil, access_token)
end

#matrix_login(user, password) {|access_token| ... } ⇒ Object

Yields:

  • (access_token) 


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# File 'src/ruby/include/matrix.rb', line 40

def (user, password, &block)
    # login
    response = matrix_post("/_matrix/client/r0/login", {
        :type => 'm.login.password',
        :user => user,
        :password => password
    })
    access_token = response['access_token'] || ''
    assert(!access_token.empty?)

    yield(access_token)

    matrix_post("/_matrix/client/r0/logout", {}, access_token)
end

#matrix_post(path, data = {}, access_token = nil) ⇒ Object 



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# File 'src/ruby/include/matrix.rb', line 36

def matrix_post(path, data = {}, access_token = nil)
    matrix_request(:post, path, data, access_token)
end

#matrix_request(method, path, data = {}, access_token = nil) ⇒ Object 



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# File 'src/ruby/include/matrix.rb', line 3

def matrix_request(method, path, data = {}, access_token = nil)
    assert([:get, :post].include?(method))
    response = nil
    success = false
    methods = {:get => Curl.method(:get),
               :post => Curl.method(:post)}
    3.times do
        c = methods[method].call("https://#{MATRIX_DOMAIN}#{path}", data.nil? ? nil : data.to_json) do |http|
            http.headers['Authorization'] = "Bearer #{access_token}" if access_token
        end
        begin
            response = JSON.parse(c.body_str)
        rescue JSON::ParserError => e
            STDERR.puts c.body_str
            raise e
        end
        if response['retry_after_ms']
            sleep response['retry_after_ms'].to_f / 1000.0
        else
            success = true
            break
        end
    end
    unless success
        raise "unable to complete matrix_request: #{path} / #{data.to_json}"
    end
    response
end

#may_edit_lessons?(lesson_key) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'src/ruby/main.rb', line 2237

def may_edit_lessons?(lesson_key)
    teacher_logged_in? && (@@lessons_for_shorthand[@session_user[:shorthand]].include?(lesson_key) || (@@lessons[:historic_lessons_for_shorthand][@session_user[:shorthand]].include?(lesson_key)))
end

#mix(a, b, t) ⇒ Object 



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# File 'src/ruby/include/color.rb', line 67

def mix(a, b, t)
    t1 = 1.0 - t
    return [a[0] * t1 + b[0] * t,
            a[1] * t1 + b[1] * t,
            a[2] * t1 + b[2] * t]
end

#monitor_logged_in? ⇒ Boolean

Returns true if a kurs tablet is logged in.

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 126

def monitor_logged_in?
    user_logged_in? && @session_user[:is_monitor]
end

#nav_items(primary_color, now, new_messages_count) ⇒ Object 



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# File 'src/ruby/main.rb', line 1668

def nav_items(primary_color, now, new_messages_count)
    if tablet_logged_in?
        tablet_id = @session_user[:tablet_id]
        tablet = @@tablets[tablet_id] || {}
        tablet_id_span = "<span class='tablet-id-indicator' style='background-color: #{tablet[:bg_color]}; color: #{tablet[:fg_color]}'>#{tablet_id}</span>"
        if teacher_tablet_logged_in?
            return "<div style='margin-right: 15px;'><b>Lehrer-Tablet-Modus</b>#{tablet_id_span}</div>"
        elsif kurs_tablet_logged_in?
            return "<div style='margin-right: 15px;'><b>Kurs-Tablet-Modus</b>#{tablet_id_span}</div>"
        elsif klassenraum_logged_in?
            return "<div style='margin-right: 15px;'><b>Klassenraum-Modus</b>#{tablet_id_span}</div>"
        elsif tablet_logged_in?
            description = ''
            if tablet[:klassen_stream]
                description = " (Klassenstreaming #{tablet[:klassen_stream]})"
            end
            if @session_user[:tablet_type] == :bib_mobile
                return ""
            else
                return "<div style='margin-right: 15px;'><b>Tablet-Modus</b>#{description}#{tablet_id_span}</div>"
            end
        end
    end
    if monitor_logged_in?
        return ''
    end
    StringIO.open do |io|
        new_messages_count_s = nil
        nav_items = []
        if user_logged_in?
            nav_items << ['/', 'Stundenplan', 'fa fa-calendar']
            if teacher_logged_in?
                nav_items << :kurse
                nav_items << :directory
            end
            # if user_who_can_upload_files_logged_in? || user_who_can_manage_news_logged_in?
            #     nav_items << :website
            # end
            # if user_who_can_manage_monitors_logged_in?
            #     nav_items << :monitor
            # end
            nav_items << :messages
            if user_is_eligible_for_tresor?
                nav_items << :tresor
            end
            if admin_logged_in? || user_who_can_upload_files_logged_in? || user_who_can_manage_news_logged_in? || user_who_can_manage_monitors_logged_in? || user_who_can_manage_tablets_logged_in?
                nav_items << :admin
            end
            if technikteam_logged_in?
                unless admin_logged_in?
                    nav_items << :aula
                end
            end
            if user_who_can_report_tech_problems_logged_in?
                unless admin_logged_in?
                    nav_items << :techteam
                end
            end
            # nav_items << :advent_calendar #if advents_calendar_date_today > 0
            nav_items << :profile
            new_messages_count_s = new_messages_count.to_s
            new_messages_count_s = '99+' if new_messages_count > 99
            if new_messages_count > 0
                io.puts "<a href='/messages' class='new-messages-indicator-mini'><i class='fa fa-comment' style='color: #{primary_color};'></i><span>#{new_messages_count_s}</span></a>"
            end
        else
            nav_items << ['/hilfe', 'Hilfe', 'fa fa-question-circle']
            nav_items << ['/', 'Anmelden', 'fa fa-sign-in']
        end
        if external_user_logged_in?
            nav_items = []
            if can_manage_bib_payment_logged_in?
                nav_items << ['/', 'Lehrmittelverein', 'fa fa-book']
                nav_items << :profile
            end
        end
        return nil if nav_items.empty?
        io.puts "<button class='navbar-toggler' type='button' data-toggle='collapse' data-target='#navbarTogglerDemo02' aria-controls='navbarTogglerDemo02' aria-expanded='false' aria-label='Toggle navigation'>"
        io.puts "<span class='navbar-toggler-icon'></span>"
        io.puts "</button>"
        io.puts "<div class='collapse navbar-collapse my-0 flex-grow-0' id='navbarTogglerDemo02'>"
        io.puts "<ul class='navbar-nav mr-auto'>"
        nav_items.each do |x|
            if x == :admin
                io.puts "<li class='nav-item dropdown'>"
                io.puts "<a class='nav-link nav-icon dropdown-toggle' href='#' id='navbarDropdownAdmin' role='button' data-toggle='dropdown' aria-haspopup='true' aria-expanded='false'>"
                io.puts "<div class='icon'><i class='fa fa-wrench'></i></div>Administration"
                io.puts "</a>"
                io.puts "<div class='dropdown-menu dropdown-menu-right' aria-labelledby='navbarDropdownAdmin'>"
                printed_something = false
                if user_who_can_manage_news_logged_in?
                    io.puts "<a class='dropdown-item nav-icon' href='/manage_news'><div class='icon'><i class='fa fa-newspaper-o'></i></div><span class='label'>News verwalten</span></a>"
                    io.puts "<a class='dropdown-item nav-icon' href='/manage_calendar'><div class='icon'><i class='fa fa-calendar'></i></div><span class='label'>Termine verwalten</span></a>"
                    # io.puts "<a class='dropdown-item nav-icon' href='/anmeldungen'><div class='icon'><i class='fa fa-group'></i></div><span class='label'>Anmeldungen einsehen</span></a>"
                    printed_something = true
                end
                if user_who_can_upload_files_logged_in?
                    io.puts "<div class='dropdown-divider'></div>" if printed_something
                    io.puts "<a class='dropdown-item nav-icon' href='/upload_images'><div class='icon'><i class='fa fa-photo'></i></div><span class='label'>Bilder hochladen</span></a>"
                    io.puts "<a class='dropdown-item nav-icon' href='/upload_files'><div class='icon'><i class='fa fa-file-pdf-o'></i></div><span class='label'>Dateien hochladen</span></a>"
                    printed_something = true
                end
                if user_who_can_manage_monitors_logged_in?
                    io.puts "<div class='dropdown-divider'></div>" if printed_something
                    io.puts "<a class='dropdown-item nav-icon' href='/manage_monitor'><div class='icon'><i class='fa fa-tv'></i></div><span class='label'>Monitore verwalten</span></a>"
                    printed_something = true
                end
                # if user_who_can_manage_ags_logged_in?
                #     io.puts "<div class='dropdown-divider'></div>" if printed_something
                #     io.puts "<a class='dropdown-item nav-icon' href='/manage_ags'><div class='icon'><i class='fa fa-community'></i></div><span class='label'>AGs verwalten</span></a>"
                #     printed_something = true
                # end
                if admin_logged_in?
                    io.puts "<div class='dropdown-divider'></div>" if printed_something
                    io.puts "<a class='dropdown-item nav-icon' href='/admin'><div class='icon'><i class='fa fa-wrench'></i></div><span class='label'>Administration</span></a>"
                end
                if user_who_can_manage_tablets_logged_in?
                    io.puts "<a class='dropdown-item nav-icon' href='/bookings'><div class='icon'><i class='fa fa-tablet'></i></div><span class='label'>Buchungen</span></a>"
                    io.puts "<a class='dropdown-item nav-icon' href='/techpostadmin'><div class='icon'><i class='fa fa-laptop'></i></div><span class='label'>Technikamt (Admin)</span></a>"
                end
                if admin_logged_in?
                    io.puts "<div class='dropdown-divider'></div>"
                    io.puts "<a class='dropdown-item nav-icon' href='/show_all_login_codes'><div class='icon'><i class='fa fa-key-modern'></i></div><span class='label'>Live-Anmeldungen</span></a>"
                    io.puts "<a class='dropdown-item nav-icon' href='/email_accounts'><div class='icon'><i class='fa fa-envelope'></i></div><span class='label'>E-Mail-Postfächer</span></a>"
                    io.puts "<a class='dropdown-item nav-icon' href='/stats'><div class='icon'><i class='fa fa-bar-chart'></i></div><span class='label'>Statistiken</span></a>"
                    io.puts "<a class='dropdown-item nav-icon' href='/aula'><div class='icon'><i class='fa fa-music'></i></div><span class='label'>Aula</span></a>"
                    printed_something = true
                end
                io.puts "</div>"
                io.puts "</li>"
            elsif x == :advent_calendar
                unless admin_logged_in?
                    io.puts "<li class='nav-item text-nowrap'>"
                    io.puts "<a class='bu-launch-adventskalender nav-link nav-icon'><div class='icon'><i class='fa fa-snowflake-o'></i></div>Adventskalender</a>"
                    io.puts "</li>"
                end
            elsif x == :profile
                io.puts "<li class='nav-item dropdown'>"
                io.puts "<a class='nav-link nav-icon dropdown-toggle' href='#' id='navbarDropdownProfile' role='button' data-toggle='dropdown' aria-haspopup='true' aria-expanded='false'>"
                display_name = htmlentities(@session_user[:display_name])
                if @session_user[:klasse]
                    temp = [tr_klasse(@session_user[:klasse])]
                    # if @session_user[:group2]
                    #     temp << @session_user[:group2]
                    # end
                    display_name += " (#{temp.join('/')})"
                end
                io.puts "<div class='icon nav_avatar'>#{user_icon(@session_user[:email], 'avatar-md')}</div><span class='menu-user-name'>#{display_name}</span>"
                io.puts "</a>"
                io.puts "<div class='dropdown-menu dropdown-menu-right' aria-labelledby='navbarDropdownProfile'>"
                unless external_user_logged_in?
                    io.puts "<a class='dropdown-item nav-icon' href='/profil'><div class='icon'>#{user_icon(@session_user[:email], 'avatar-sm')}</div><span class='label'>Profil</span></a>"
                end
                sessions = all_sessions()
                if sessions.size > 1
                    unless external_user_logged_in?
                        io.puts "<div class='dropdown-divider'></div>"
                    end
                    sessions[1, sessions.size - 1].each.with_index do |entry, _|
                        display_name = htmlentities(entry[:user][:display_name])
                        if entry[:user][:klasse]
                            display_name += " (#{tr_klasse(entry[:user][:klasse])})"
                        end
                        io.puts "<a class='dropdown-item nav-icon switch-session' data-sidindex='#{_ + 1}' href='#'><div class='icon'>#{user_icon(entry[:user][:email], 'avatar-sm')}</div><span class='label'>#{display_name}</span></a>"
                    end
                end
                io.puts "<a class='dropdown-item nav-icon' href='/login'><div class='icon'><i class='fa fa-sign-in'></i></div><span class='label'>Zusätzliche Anmeldung…</span></a>"
                unless external_user_logged_in?
                    io.puts "<a class='dropdown-item nav-icon' href='/login_nc'><div class='icon'><i class='fa fa-nextcloud'></i></div><span class='label'>In Nextcloud anmelden…</span></a>"
                    # if can_manage_agr_app_logged_in? || can_manage_bib_members_logged_in? || can_manage_bib_logged_in? || teacher_logged_in?
                        io.puts "<div class='dropdown-divider'></div>"
                        if gev_logged_in?
                            io.puts "<a class='dropdown-item nav-icon' href='/gev'><div class='icon'><i class='fa fa-users'></i></div><span class='label'>Gesamtelternvertretung</span></a>"
                        end
                        if can_manage_agr_app_logged_in?
                            io.puts "<a class='dropdown-item nav-icon' href='/agr_app'><div class='icon'><i class='fa fa-mobile'></i></div><span class='label'>Altgriechisch-App</span></a>"
                        end
                        if can_manage_bib_members_logged_in?
                            io.puts "<a class='dropdown-item nav-icon' href='/lehrbuchverein'><div class='icon'><i class='fa fa-book'></i></div><span class='label'>Lehrmittelverein</span></a>"
                        end
                        # if can_manage_bib_logged_in? || teacher_logged_in?
                            io.puts "<a class='dropdown-item nav-icon' href='/bibliothek'><div class='icon'><i class='fa fa-book'></i></div><span class='label'>Bibliothek</span></a>"
                        # end
                    # end
                    if teacher_or_sv_logged_in?
                        io.puts "<div class='dropdown-divider'></div>"
                        if teacher_or_sv_logged_in?
                            if teacher_logged_in?
                                if can_manage_salzh_logged_in?
                                    io.puts "<a class='dropdown-item nav-icon' href='/salzh'><div class='icon'><i class='fa fa-home'></i></div><span class='label'>Testungen</span></a>"
                                end
                                io.puts "<a class='dropdown-item nav-icon' href='/tests'><div class='icon'><i class='fa fa-file-text-o'></i></div><span class='label'>Klassenarbeiten</span></a>"
                            end
                            io.puts "<a class='dropdown-item nav-icon' href='/events'><div class='icon'><i class='fa fa-calendar-check-o'></i></div><span class='label'>Termine</span></a>"
                            io.puts "<a class='dropdown-item nav-icon' href='/polls'><div class='icon'><i class='fa fa-bar-chart'></i></div><span class='label'>Umfragen</span></a>"
                            io.puts "<a class='dropdown-item nav-icon' href='/prepare_vote'><div class='icon'><i class='fa fa-hand-paper-o'></i></div><span class='label'>Abstimmungen</span></a>"
                            io.puts "<a class='dropdown-item nav-icon' href='/mailing_lists'><div class='icon'><i class='fa fa-envelope'></i></div><span class='label'>E-Mail-Verteiler</span></a>"
                            io.puts "<a class='dropdown-item nav-icon' href='/groups'><div class='icon'><i class='fa fa-group'></i></div><span class='label'>Gruppen</span></a>"
                        end
                    end
                    # if @session_user[:can_upload_vplan]
                    #     io.puts "<div class='dropdown-divider'></div>"
                    #     io.puts "<a class='dropdown-item nav-icon' href='/upload_vplan_html'><div class='icon'><i class='fa fa-upload'></i></div><span class='label'>Vertretungsplan hochladen</span></a>"
                    # end
                    io.puts "<div class='dropdown-divider'></div>"
                    # if true
                    #     io.puts "<a class='dropdown-item nav-icon' href='/h4ck'><div class='icon'><i class='fa fa-rocket'></i></div><span class='label'>Dashboard Hackers</span></a>"
                    # end
                    # if admin_logged_in?
                    #     io.puts "<a class='bu-launch-adventskalender dropdown-item nav-icon'><div class='icon'><i class='fa fa-snowflake-o'></i></div><span class='label'>Adventskalender</span></a>"
                    # end
                end
                io.puts "<a class='dropdown-item nav-icon' href='/hilfe'><div class='icon'><i class='fa fa-question-circle'></i></div><span class='label'>Hilfe</span></a>"
                io.puts "<div class='dropdown-divider'></div>"
                io.puts "<a class='dropdown-item nav-icon' href='#' onclick='perform_logout();'><div class='icon'><i class='fa fa-sign-out'></i></div><span class='label'>Abmelden</span></a>"
                io.puts "</div>"
                io.puts "</li>"
            elsif x == :kurse
                unless (@@lessons_for_shorthand[@session_user[:shorthand]] || []).empty? && (@@lessons[:historic_lessons_for_shorthand][@session_user[:shorthand]] || []).empty?
                    io.puts "<li class='nav-item dropdown'>"
                    io.puts "<a class='nav-link nav-icon dropdown-toggle' href='#' id='navbarDropdownKurse' role='button' data-toggle='dropdown' aria-haspopup='true' aria-expanded='false'>"
                    io.puts "<div class='icon'><i class='fa fa-address-book'></i></div>Kurse"
                    io.puts "</a>"
                    io.puts "<div class='dropdown-menu' aria-labelledby='navbarDropdownKurse'>"
                    taken_lesson_keys = Set.new()
                    (@@lessons_for_shorthand[@session_user[:shorthand]] || []).each do |lesson_key|
                        lesson_info = @@lessons[:lesson_keys][lesson_key]
                        if lesson_info
                            fach = lesson_info[:fach]
                            fach = @@faecher[fach] if @@faecher[fach]
                            io.puts "<a class='dropdown-item nav-icon' href='/lessons/#{CGI.escape(lesson_key)}'><div class='icon'><i class='fa fa-address-book'></i></div><span class='label'>#{lesson_info[:pretty_folder_name]}</span></a>"
                            taken_lesson_keys << lesson_key
                        end
                    end
                    remaining_lesson_keys = ((@@lessons[:historic_lessons_for_shorthand][@session_user[:shorthand]] || Set.new()) - taken_lesson_keys)
                    unless remaining_lesson_keys.empty?
                        lesson_keys_with_data = neo4j_query(<<~END_OF_QUERY, {:lesson_keys => remaining_lesson_keys}).map { |x| x['l.key'] }
                            MATCH (l:Lesson)
                            WHERE l.key IN $lesson_keys
                            RETURN l.key;
                        END_OF_QUERY
                        remaining_lesson_keys &= Set.new(lesson_keys_with_data)
                        unless remaining_lesson_keys.empty?
                            io.puts "<div class='dropdown-divider'></div>"
                            remaining_lesson_keys.to_a.sort.each do |lesson_key|
                                lesson_info = @@lessons[:lesson_keys][lesson_key]
                                if lesson_info
                                    fach = lesson_info[:fach]
                                    fach = @@faecher[fach] if @@faecher[fach]
                                    io.puts "<a class='dropdown-item nav-icon' href='/lessons/#{CGI.escape(lesson_key)}'><div class='icon'><i class='fa fa-address-book'></i></div><span class='label'>#{fach} (#{lesson_info[:klassen].map { |x| tr_klasse(x) }.join(', ')})</span></a>"
                                end
                            end
                        end
                    end
                    io.puts "</div>"
                    io.puts "</li>"
                end
            elsif x == :directory
                klassen = @@klassen_for_shorthand[@session_user[:shorthand]] || []
                if user_who_can_manage_antikenfahrt_logged_in?
                    klassen << '11'
                    klassen << '12'
                    klassen.uniq!
                end
                unless klassen.empty?
                    io.puts "<li class='nav-item dropdown'>"
                    io.puts "<a class='nav-link nav-icon dropdown-toggle' href='#' id='navbarDropdownKlassen' role='button' data-toggle='dropdown' aria-haspopup='true' aria-expanded='false'>"
                    io.puts "<div class='icon'><i class='fa fa-address-book'></i></div>Klassen"
                    io.puts "</a>"
                    io.puts "<div class='dropdown-menu' aria-labelledby='navbarDropdownKlassen'>"
                    if can_see_all_timetables_logged_in?
                        klassen = @@klassen_order
                    end
                    klassen.each do |klasse|
                        io.puts "<a class='dropdown-item nav-icon' href='/directory/#{klasse}'><div class='icon'><i class='fa fa-address-book'></i></div><span class='label'>Klasse #{tr_klasse(klasse)}</span></a>"
                    end
                    io.puts "</div>"
                    io.puts "</li>"
                end
            elsif x == :techteam
                io.puts "<li class='nav-item text-nowrap'>"
                io.puts "<a class='nav-link nav-icon' href='/techpost'><div class='icon'><i class='fa fa-laptop'></i></div>Technikamt</a>"
            elsif x == :aula
                io.puts "<li class='nav-item dropdown'>"
                io.puts "<a class='nav-link nav-icon dropdown-toggle' href='#' id='navbarDropdownAula' role='button' data-toggle='dropdown' aria-haspopup='true' aria-expanded='false'>"
                io.puts "<div class='icon'><i class='fa fa-music'></i></div>Aulatechnik"
                io.puts "</a>"
                io.puts "<div class='dropdown-menu dropdown-menu-right' aria-labelledby='navbarDropdownAula'>"
                io.puts "<a class='dropdown-item nav-icon' href='/aula_light'><div class='icon'><i class='fa fa-lightbulb-o'></i></div><span class='label'>Licht</span></a>"
                io.puts "<a class='dropdown-item nav-icon' style='display: none;' href='/aula_sound'><div class='icon'><i class='fa fa-music'></i></div><span class='label'>Ton</span></a>"
                io.puts "<a class='dropdown-item nav-icon' href='/aula_progress'><div class='icon'><i class='fa fa-bars'></i></div><span class='label'>Ablauf</span></a>"
                io.puts "</div>"
                io.puts "</li>"
            elsif x == :messages
                io.puts "<li class='nav-item text-nowrap'>"
                if new_messages_count > 0
                    io.puts "<a class='nav-link nav-icon' href='/messages'><div class='icon'><i class='fa fa-comment'></i></div>Nachrichten<span class='new-messages-indicator' style='background-color: #{primary_color}'><span>#{new_messages_count_s}</span></span></a>"
                else
                    io.puts "<a class='nav-link nav-icon' href='/messages'><div class='icon'><i class='fa fa-comment'></i></div>Nachrichten</a>"
                end
                io.puts "</li>"
            elsif x == :tresor
                io.puts "<li class='nav-item text-nowrap'>"
                io.puts "<a class='nav-link nav-icon' href='/tresor'><div class='icon'><i class='fa fa-database'></i></div>Datentresor</a>"
                io.puts "</li>"
            else
                io.puts "<li class='nav-item text-nowrap'>"
                io.puts "<a class='nav-link nav-icon' href='#{x[0]}' #{x[3]}><div class='icon'><i class='#{x[2]}'></i></div>#{x[1]}</a>"
                io.puts "</li>"
            end
        end
        io.puts "</ul>"
        io.puts "</div>"
        io.string
    end
end

#parse_paths_and_values(paths, values) ⇒ Object 



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# File 'src/ruby/include/zeugnisse.rb', line 293

def parse_paths_and_values(paths, values)
    result = {}
    recurse_arrays(paths, values) do |path, value|
        result[path] = value
    end
    result
end

#parse_request_data(options = {}) ⇒ Object 



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# File 'src/ruby/main.rb', line 1360

def parse_request_data(options = {})
    options[:max_body_length] ||= 512
    options[:max_string_length] ||= 512
    options[:required_keys] ||= []
    options[:optional_keys] ||= []
    options[:max_value_lengths] ||= {}
    data_str = request.body.read(options[:max_body_length]).to_s
    if @session_user
        unless ['/api/send_message', '/api/update_message', '/api/submit_poll_run'].include?(request.path)
            begin
                ip_short = request.ip.to_s.split('.').map { |x| sprintf('%02x', x.to_i) }.join('')
                STDERR.puts sprintf("%s [%s] [%s] %s %s", DateTime.now.strftime('%Y-%m-%d %H:%M:%S'), ip_short, @session_user[:nc_login], request.path, data_str)
            rescue
            end
        end
    end
#         debug data_str
    @latest_request_body = data_str.dup
    begin
        assert(data_str.is_a? String)
        assert(data_str.size < options[:max_body_length], 'too_much_data')
        data = JSON::parse(data_str)
        @latest_request_body_parsed = data.dup
        result = {}
        options[:required_keys].each do |key|
            assert(data.include?(key.to_s))
            test_request_parameter(data, key, options)
            result[key.to_sym] = data[key.to_s]
        end
        options[:optional_keys].each do |key|
            if data.include?(key.to_s)
                test_request_parameter(data, key, options)
                result[key.to_sym] = data[key.to_s]
            end
        end
        result
    rescue
        debug "Request was:"
        debug data_str
        raise
    end
end

#pick_random_color_scheme(go_wild = false) ⇒ Object 



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# File 'src/ruby/main.rb', line 2259

def pick_random_color_scheme(go_wild = false)
    today = Date.today.strftime('%Y-%m-%d')
    return 'la2c6e80d60aea2c6e80' if ZEUGNISKONFERENZEN.include?(today)
    @@default_color_scheme ||= {}
    jd = (Date.today + 1).jd
    return @@default_color_scheme[jd] if @@default_color_scheme[jd]
    unless go_wild
        srand(DEVELOPMENT ? (Time.now.to_f * 1000).to_i : jd)
    end
    which = nil
    style = nil
    while true do
        which = @@color_scheme_colors.sample
        style = [0].sample
        break unless which[4] == 'd' || which[1] == '#ff0040'
    end
    color_scheme = "#{which[4]}#{which[0, 3].join('').gsub('#', '')}#{style}"
    @@default_color_scheme[jd] = color_scheme unless DEVELOPMENT
    return color_scheme
end

#poll_run_results_to_html(poll, poll_run, responses, target = :web, only_this_email = nil) ⇒ Object 



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# File 'src/ruby/include/poll.rb', line 202

def poll_run_results_to_html(poll, poll_run, responses, target = :web, only_this_email = nil)
    StringIO.open do |io|
        unless only_this_email
            io.puts "<h3>Umfrage: #{poll[:title]}</h3>"
            time_range = "am #{Date.parse(poll_run[:start_date]).strftime('%d.%m.%Y')} von #{poll_run[:start_time]} Uhr bis #{poll_run[:end_time]} Uhr"
            if poll_run[:start_date] != poll_run[:end_date]
                time_range = "vom #{Date.parse(poll_run[:start_date]).strftime('%d.%m.%Y')} (#{poll_run[:start_time]} Uhr) bis zum #{Date.parse(poll_run[:end_date]).strftime('%d.%m.%Y')} (#{poll_run[:end_time]} Uhr)"
            end
            io.puts "<p>Diese #{poll_run[:anonymous] ? 'anonyme' : 'personengebundene'} Umfrage wurde von #{poll[:organizer].sub('Herr ', 'Herrn ')} mit #{poll_run[:participant_count]} Teilnehmern #{time_range} durchgeführt.</p>"
            io.puts "<div class='alert alert-info'>"
            io.puts "Von #{poll_run[:participant_count]} Teilnehmern haben #{responses.size} die Umfrage beantwortet (#{(responses.size * 100 / poll_run[:participant_count]).to_i}%)."
            unless poll_run[:anonymous]
                missing_responses_from = (Set.new(poll_run[:participants].keys) - Set.new(responses.map { |x| x[:email]})).map { |x| poll_run[:participants][x] }.sort
                io.puts "Es fehlen Antworten von: <em>#{missing_responses_from.join(', ')}</em>."
            end
            io.puts "</div>"
            poll_run[:items].each_with_index do |item, item_index|
                item = item.transform_keys(&:to_sym)
                if item[:type] == 'paragraph'
                    io.puts "<p><strong>#{item[:title]}</strong></p>" unless (item[:title] || '').strip.empty?
                    io.puts "<p>#{item[:text]}</p>" unless (item[:text] || '').strip.empty?
                elsif item[:type] == 'radio' || item[:type] == 'checkbox'
                    io.puts "<p>"
                    io.puts "<strong>#{item[:title]}</strong>"
                    if item[:type] == 'checkbox'
                        io.puts " <em>(Mehrfachnennungen möglich)</em>"
                    end
                    io.puts "</p>"
                    histogram = {}
                    participants_for_answer = {}
                    (0...item[:answers].size).each { |x| histogram[x] = 0 }
                    responses.each do |entry|
                        response = entry[:response]
                        if item[:type] == 'radio'
                            value = response[item_index.to_s]
                            unless value.nil?
                                unless histogram[value]
                                    STDERR.puts "Error evaluating poll: unknown value #{value} for #{item.to_json}!"
                                    next
                                end
                                histogram[value] += 1
                                participants_for_answer[value] ||= []
                                participants_for_answer[value] << entry[:email]
                            end
                        else
                            (response[item_index.to_s] || []).each do |value|
                                unless histogram[value]
                                    STDERR.puts "Error evaluating poll: unknown value #{value} for #{item.to_json}!"
                                    next
                                end
                                histogram[value] += 1
                                participants_for_answer[value] ||= []
                                participants_for_answer[value] << entry[:email]
                            end
                        end
                    end
                    sum = histogram.values.sum
                    sum = 1 if sum == 0
                    io.puts "<table class='table'>"
                    io.puts "<tbody>"
                    (0...item[:answers].size).each do |answer_index| 
                        v = histogram[answer_index]
                        io.puts "<tr class='pb-0'><td>#{item[:answers][answer_index]}</td><td style='text-align: right;'>#{v == 0 ? '&ndash;' : v}</td></tr>"
                        io.puts "<tr class='noborder pdf-space-below'><td colspan='2'>"
                        io.puts "<div class='progress'>"
                        io.puts "<div class='progress-bar progress-bar-striped bg-info' role='progressbar' style='width: #{(v * 100.0 / sum).round}%' aria-valuenow='50' aria-valuemin='0' aria-valuemax='100'><span>#{(v * 100.0 / sum).round}%</span></div>"
                        io.puts "</div>"
                        unless poll_run[:anonymous]
                            if participants_for_answer[answer_index]
                                io.puts "<em>#{(participants_for_answer[answer_index] || []).map { |x| poll_run[:participants][x]}.join(', ')}</em>"
                            else
                                io.puts "<em>&ndash;</em>"
                            end
                        end
                        io.puts "</td></tr>"
                    end
                    io.puts "</tbody>"
                    io.puts "</table>"
                elsif item[:type] == 'textarea'
                    io.puts "<p>"
                    io.puts "<strong>#{item[:title]}</strong>"
                    io.puts "</p>"
                    first_response = true
                    responses.each do |entry|
                        response = (entry[:response][item_index.to_s] || '').strip
                        unless response.empty?
                            io.puts "<hr />" unless first_response
                            if poll_run[:anonymous]
                                io.puts "<p>#{response}</p>"
                            else
                                io.puts "<p><em>#{poll_run[:participants][entry[:email]]}</em>: #{response}</p>"
                            end
                            first_response = false
                        end
                    end
                    
                end
            end
        end
        unless poll_run[:anonymous]
            responses.each do |entry|
                if only_this_email
                    next unless entry[:email] == only_this_email
                else
                    io.puts "<div class='page-break'></div>"
                end
                io.puts "<h3>Einzelauswertung: #{poll_run[:participants][entry[:email]]}</h3>"
                poll_run[:items].each_with_index do |item, item_index|
                    item = item.transform_keys(&:to_sym)
                    if item[:type] == 'paragraph'
                        io.puts "<p><strong>#{item[:title]}</strong></p>" unless (item[:title] || '').strip.empty?
                        io.puts "<p>#{item[:text]}</p>" unless (item[:text] || '').strip.empty?
                    elsif item[:type] == 'radio'
                        io.puts "<p>"
                        io.puts "<strong>#{item[:title]}</strong>"
                        io.puts "</p>"
                        answer = entry[:response][item_index.to_s]
                        unless answer.nil?
                            io.puts "<p>#{item[:answers][answer]}</p>"
                        end
                    elsif item[:type] == 'radio' || item[:type] == 'checkbox'
                        io.puts "<p>"
                        io.puts "<strong>#{item[:title]}</strong>"
                        io.puts " <em>(Mehrfachnennungen möglich)</em>"
                        io.puts "</p>"
                        unless entry[:response][item_index.to_s].nil?
                            io.puts "<p>"
                            io.puts entry[:response][item_index.to_s].reject { |x| x.nil? }.map { |answer| item[:answers][answer]}.join(', ')
                            io.puts "</p>"
                        end
                    elsif item[:type] == 'textarea'
                        io.puts "<p>"
                        io.puts "<strong>#{item[:title]}</strong>"
                        io.puts "</p>"
                        response = (entry[:response][item_index.to_s] || '').strip
                        io.puts "<p>#{response}</p>" unless response.empty?
                    end
                end
            end
        end
        
#             cm = {}
#             citems = (0...poll_run[:items].size).select do |item_index|
#                 item = poll_run[:items][item_index].transform_keys(&:to_sym)
#                 ['radio', 'checkbox'].include?(item[:type])
#             end.map { |x| x.to_s }
#             citems.each do |a|
#                 citems.each do |b|
#                     next if a == b
#                     total = 0
#                     matches = 0
#                     responses.each do |response|
#                         # now we're looking at responses by one person to questions a and b
#                         va = response[:response][a]
#                         vb = response[:response][b]
#                         va = [va] unless va.is_a? Array
#                         vb = [vb] unless vb.is_a? Array
#                         va.each do |za|
#                             key = "#{a}/#{za}"
#                             cm[key] ||= 0
#                             cm[key] += 1
#                             vb.each do |zb|
#                                 key = "#{a}/#{za}-#{b}/#{zb}"
#                                 cm[key] ||= 0
#                                 cm[key] += 1
#                             end
#                         end
#                     end
#                 end
#             end
#             cm_final = {}
#             cm.keys.each do |k|
#                 next unless k.include?('-')
#                 match = cm[k]
#                 total = cm[k.split('-').first]
#                 cm_final[k] = match * 100.0 / total
#             end
#             
#             use_keys = cm_final.keys.select do |x|
#                 cm_final[x] >= 30.0
#             end.sort do |a, b|
#                 cm_final[b] <=> cm_final[a]
#             end
#             unless use_keys.empty?
#                 io.puts "<div class='page-break'></div>"
#                 io.puts "<h3>Korrelationen</h3>"
#                 io.puts "<table class='table'>"
#                 use_keys.each do |k|
#                     k2 = k.split('-').map { |x| x.split('/') }.flatten
#                     qa = poll_run[:items][k2[0].to_i]['title']
#                     aa = poll_run[:items][k2[0].to_i]['answers'][k2[1].to_i]
#                     qb = poll_run[:items][k2[2].to_i]['title']
#                     ab = poll_run[:items][k2[2].to_i]['answers'][k2[3].to_i]
#                     io.puts "<tr><td style='vertical-align: top;'>#{sprintf('%3d%%', cm_final[k])}</td><td><strong>#{qa}</strong><br />#{aa}<br /><strong>#{qb}</strong><br />#{ab}</td></tr>"
#                 end
#                 io.puts "</table>"
#             end
        
        io.string
    end
end

#print_ad_hoc_2fa_panel ⇒ Object 



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# File 'src/ruby/include/user.rb', line 579

def print_ad_hoc_2fa_panel()
    return '' unless admin_2fa_hotline_logged_in?
    require_admin_2fa_hotline!
    ts = Time.now.to_i
    neo4j_query(<<~END_OF_QUERY, {:ts => ts})
        MATCH (ahr:AdHocTwoFaRequest)-[:BELONGS_TO]->(s:Session)-[:BELONGS_TO]->(u:User)
        WHERE $ts > ahr.ts_expire
        DETACH DELETE ahr;
    END_OF_QUERY
    users = neo4j_query(<<~END_OF_QUERY).map { |x| x['u'] }
        MATCH (ahr:AdHocTwoFaRequest)-[:BELONGS_TO]->(s:Session)-[:BELONGS_TO]->(u:User)
        RETURN u;
    END_OF_QUERY
    return '' if users.empty?
    StringIO.open do |io|
        io.puts "<div class='col-lg-12 col-md-4 col-sm-6'>"
        io.puts "<div class='hint'>"
        io.puts "<p><b>Datentresor-Hotline</b></p>"
        io.puts "<hr />"
        users.each do |user|
            io.puts "<button class='bu_open_ad_hoc_2fa_request button btn btn-success' data-email='#{user[:email]}' data-name='#{@@user_info[user[:email]][:display_name]}'><i class='fa fa-phone'></i>&nbsp;&nbsp;#{@@user_info[user[:email]][:display_name_official]}&nbsp;&nbsp;<i class='fa fa-angle-double-right'></i></button>"
        end
        # io.puts "<div><span style='font-size: 200%; opacity: 0.7; float: left; margin-right: 8px;'><i class='fa fa-book'></i></span>#{n_to_s[@@bib_summoned_books[email].size] || 'Mehrere'} Bücher, die du ausgeliehen hast, #{@@bib_summoned_books[email].size == 1 ? 'wird' : 'werden'} dringend in der Bibliothek benötigt. Bitte bring #{@@bib_summoned_books[email].size == 1 ? 'es' : 'sie'} zurück und lege #{@@bib_summoned_books[email].size == 1 ? 'es' : 'sie'} ins <a target='_blank' href='https://rundgang.gymnasiumsteglitz.de/#g114'>Rückgaberegal</a> vor der Bibliothek.</div>"
        io.puts "</div>"
        io.puts "</div>"
        io.string
    end
end

#print_admin_dashboard ⇒ Object 



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# File 'src/ruby/include/admin.rb', line 18

def print_admin_dashboard()
    require_admin!
    temp = neo4j_query(<<~END_OF_QUERY).map { |x| {:session => x['s'], :email => x['u.email'] } }
        MATCH (s:Session)-[:BELONGS_TO]->(u:User)
        RETURN s, u.email
    END_OF_QUERY
    all_sessions = {}
    temp.each do |s|
        all_sessions[s[:email]] ||= []
        all_sessions[s[:email]] << s[:session]
    end
    all_homeschooling_users = Main.get_all_homeschooling_users()
    users_with_telephone_number = Set.new(neo4j_query("MATCH (u:User) WHERE u.telephone_number IS NOT NULL RETURN u.email").map { |x| x['u.email']})
    users_with_otp = Set.new(neo4j_query("MATCH (u:User) WHERE u.otp_token IS NOT NULL RETURN u.email").map { |x| x['u.email']})
    twofa_status = {}
    (users_with_telephone_number | users_with_otp).each do |email|
        methods = []
        methods << "<i class='fa fa-mobile'></i>&nbsp;&nbsp;SMS" if users_with_telephone_number.include?(email)
        methods << "<i class='fa fa-qrcode'></i>&nbsp;&nbsp;OTP" if users_with_otp.include?(email)
        twofa_status[email] = methods.join(' / ')
    end
    StringIO.open do |io|
        bolt_connections = neo4j_query("CALL dbms.listConnections();").size
        io.puts "<span style='float: right;'>SMS Gateway: #{Main.sms_gateway_ready? ? 'online' : 'offline'} / Aktive Bolt-Verbindungen: #{bolt_connections} / <a href='/schema'>Schema</a></span>"
        io.puts "<a class='btn btn-secondary' href='#teachers'>Lehrerinnen und Lehrer</a>"
        io.puts "<a class='btn btn-secondary' href='#sus'>Schülerinnen und Schüler</a>"
        io.puts "<a class='btn btn-secondary' href='#website'>Website</a>"
        io.puts "<a class='btn btn-secondary' href='#tablets'>Tablets</a>"
        io.puts "<a class='btn btn-secondary' href='#monitor'>Monitor</a>"
        io.puts "<a class='btn btn-secondary' href='#bibliothek'>Bibliothek</a>"
        io.puts "<a class='btn btn-secondary' href='/sus_ohne_kurse'>SuS ohne Kurse</a>"
        io.puts "<a class='btn btn-secondary' href='/api/all_sus_logo_didact'>LDC: Alle SuS</a>"
        io.puts "<a class='btn btn-secondary' href='/api/all_lul_logo_didact'>LDC: Alle Lehrkräfte</a>"
        io.puts "<a class='btn btn-secondary' href='/api/all_sus_untis'>Untis: Alle SuS</a>"
        io.puts "<a class='btn btn-secondary' href='/api/all_kurse_untis'>Untis: Alle Kurse</a>"
        io.puts "<hr />"
        io.puts "<h3 id='teachers'>Lehrerinnen und Lehrer</h3>"
        io.puts "<div style='max-width: 100%; overflow-x: auto;'>"
        io.puts "<table class='table table-condensed table-striped narrow' style='width: unset; min-width: 100%;'>"
        io.puts "<thead>"
        io.puts "<tr>"
        # io.puts "<th></th>"
        io.puts "<th>Kürzel</th>"
        io.puts "<th>Name</th>"
        io.puts "<th>Vorname</th>"
        io.puts "<th>E-Mail-Adresse</th>"
        io.puts "<th>Stundenplan</th>"
        io.puts "<th>Anmelden</th>"
        io.puts "<th>2FA</th>"
        io.puts "<th>Sessions</th>"
        io.puts "</tr>"
        io.puts "</thead>"
        io.puts "<tbody>"
        @@lehrer_order.each do |email|
            io.puts "<tr class='user_row'>"
            user = @@user_info[email]
            # io.puts "<td>#{user_icon(email, 'avatar-md')}</td>"
            io.puts "<td>#{user[:shorthand]}</td>"
            io.puts "<td>#{user[:last_name]}</td>"
            io.puts "<td>#{user[:first_name]}</td>"
            if USE_MOCK_NAMES
                io.puts "<td>#{user[:first_name].downcase}.#{user[:last_name].downcase}@#{SCHUL_MAIL_DOMAIN}</td>"
            else
                io.print "<td>"
                print_email_field(io, user[:email])
                io.puts "</td>"
            end
            io.puts "<td><a class='btn btn-xs btn-secondary' href='/timetable/#{user[:id]}'><i class='fa fa-calendar'></i>&nbsp;&nbsp;Stundenplan</a></td>"
            io.puts "<td><button class='btn btn-warning btn-xs btn-impersonate' data-impersonate-email='#{user[:email]}'><i class='fa fa-id-badge'></i>&nbsp;&nbsp;Anmelden</button></td>"
            io.puts "<td>#{twofa_status[email]}</td>"
            if all_sessions.include?(email)
                io.puts "<td><button class='btn-sessions btn btn-xs btn-secondary' data-sessions-id='#{@@user_info[email][:id]}'>#{all_sessions[email].size} Session#{all_sessions[email].size == 1 ? '' : 's'}</button></td>"
            else
                io.puts "<td></td>"
            end
            io.puts "</tr>"
            (all_sessions[email] || []).each do |s|
                scrambled_sid = Digest::SHA2.hexdigest(SESSION_SCRAMBLER + s[:sid]).to_i(16).to_s(36)[0, 16]
                io.puts "<tr class='session-row sessions-#{@@user_info[email][:id]}' style='display: none;'>"
                io.puts "<td colspan='4'></td>"
                io.puts "<td colspan='2'>"
                io.puts "#{s[:user_agent] || '(unbekanntes Gerät)'}"
                io.puts "</td>"
                io.puts "<td>"
                io.puts "<button class='btn btn-xs btn-danger btn-purge-session' data-email='#{email}' data-scrambled-sid='#{scrambled_sid}'>Abmelden</button>"
                io.puts "</td>"
                io.puts "</tr>"
            end
        end
        io.puts "</tbody>"
        io.puts "</table>"
        io.puts "</div>"
        io.puts "<h3 id='sus'>Schülerinnen und Schüler</h3>"
        io.puts "<div style='max-width: 100%; overflow-x: auto;'>"
        io.puts "<table class='table table-condensed table-striped narrow' style='width: unset; min-width: 100%;'>"
        io.puts "<thead>"
        io.puts "<tr>"
        # io.puts "<th></th>"
        io.puts "<th>Name</th>"
        io.puts "<th>Vorname</th>"
        io.puts "<th>E-Mail-Adresse</th>"
        io.puts "<th>Stundenplan</th>"
        io.puts "<th>Anmelden</th>"
        # io.puts "<th>Homeschooling</th>"
        io.puts "<th>2FA</th>"
        io.puts "<th>Sessions</th>"
        io.puts "</tr>"
        io.puts "</thead>"
        io.puts "<tbody>"
        @@klassen_order.each do |klasse|
            io.puts "<tr>"
            io.puts "<th colspan='7'>Klasse #{tr_klasse(klasse)}</th>"
            io.puts "</tr>"
            (@@schueler_for_klasse[klasse] || []).each do |email|
                io.puts "<tr class='user_row'>"
                user = @@user_info[email]
                # io.puts "<td>#{user_icon(email, 'avatar-md')}</td>"
                io.puts "<td>#{user[:last_name]}</td>"
                io.puts "<td>#{user[:first_name]}</td>"
                io.print "<td>"
                print_email_field(io, user[:email])
                io.puts "</td>"
                io.puts "<td><a class='btn btn-xs btn-secondary' href='/timetable/#{user[:id]}'><i class='fa fa-calendar'></i>&nbsp;&nbsp;Stundenplan</a></td>"
                io.puts "<td><button class='btn btn-warning btn-xs btn-impersonate' data-impersonate-email='#{user[:email]}'><i class='fa fa-id-badge'></i>&nbsp;&nbsp;Anmelden</button></td>"
                # if all_homeschooling_users.include?(email)
                #     io.puts "<td><button class='btn btn-info btn-xs btn-toggle-homeschooling' data-email='#{user[:email]}'><i class='fa fa-home'></i>&nbsp;&nbsp;zu Hause</button></td>"
                # else
                #     io.puts "<td><button class='btn btn-secondary btn-xs btn-toggle-homeschooling' data-email='#{user[:email]}'><i class='fa fa-building'></i>&nbsp;&nbsp;Präsenz</button></td>"
                # end
                io.puts "<td>#{twofa_status[email]}</td>"
                if all_sessions.include?(email)
                    io.puts "<td><button class='btn-sessions btn btn-xs btn-secondary' data-sessions-id='#{@@user_info[email][:id]}'>#{all_sessions[email].size} Session#{all_sessions[email].size == 1 ? '' : 's'}</button></td>"
                else
                    io.puts "<td></td>"
                end
                io.puts "</tr>"
                (all_sessions[email] || []).each do |s|
                    scrambled_sid = Digest::SHA2.hexdigest(SESSION_SCRAMBLER + s[:sid]).to_i(16).to_s(36)[0, 16]
                    io.puts "<tr class='session-row sessions-#{@@user_info[email][:id]}' style='display: none;'>"
                    io.puts "<td colspan='3'></td>"
                    io.puts "<td colspan='2'>"
                    io.puts "#{s[:user_agent] || '(unbekanntes Gerät)'}"
                    io.puts "</td>"
                    io.puts "<td>"
                    io.puts "<button class='btn btn-xs btn-danger btn-purge-session' data-email='#{email}' data-scrambled-sid='#{scrambled_sid}'>Abmelden</button>"
                    io.puts "</td>"
                    io.puts "</tr>"
                end
            end
        end
        io.puts "</tbody>"
        io.puts "</table>"
        io.puts "</div>"
        io.puts "<hr />"
        io.puts "<h3 id='website'>Website</h3>"
        io.puts "<button class='btn btn-secondary bu-refresh-staging'><i id='refresh-icon-staging' class='fa fa-refresh'></i>&nbsp;&nbsp;Vorschau-Seite aktualisieren</button>"
        io.puts "<button class='btn btn-success bu-refresh-live'><i id='refresh-icon-live' class='fa fa-refresh'></i>&nbsp;&nbsp;Live-Seite aktualisieren</button>"
        io.puts "<hr />"
        io.puts "<h3 id='tablets'>Tablets</h3>"
        io.puts "<hr />"
        io.puts "<p>Mit einem Klick auf diesen Button können Sie dieses Gerät dauerhaft als Lehrer-Tablet anmelden.</p>"
        io.puts "<button class='btn btn-success bu_login_teacher_tablet'><i class='fa fa-sign-in'></i>&nbsp;&nbsp;Lehrer-Tablet-Modus aktivieren</button>"
        io.puts "<hr />"
        io.puts "<p>Bitte wählen Sie ein order mehrere Kürzel, um dieses Gerät dauerhaft als Kurs-Tablet anzumelden.</p>"
        @@shorthands.keys.sort.each do |shorthand|
            io.puts "<button class='btn-teacher-for-kurs-tablet-login btn btn-xs btn-outline-secondary' data-shorthand='#{shorthand}'>#{shorthand}</button>"
        end
        io.puts "<br /><br >"
        io.puts "<button class='btn btn-success bu_login_kurs_tablet' disabled><i class='fa fa-sign-in'></i>&nbsp;&nbsp;Kurs-Tablet-Modus aktivieren</button>"
        io.puts "<hr />"
        io.puts "<p>Bitte wählen Sie ein Tablet, um dieses Gerät dauerhaft als dieses Tablet anzumelden.</p>"
        @@tablets.keys.each do |id|
            tablet = @@tablets[id]
            io.puts "<button class='btn-tablet-login btn btn-xs btn-outline-secondary' data-id='#{id}' style='background-color: #{tablet[:bg_color]}; color: #{tablet[:fg_color]};'>#{id}</button>"
        end
        io.puts "<hr />"
        io.puts "<div style='max-width: 100%; overflow-x: auto;'>"
        io.puts "<table class='table table-condensed table-striped narrow' style='width: unset; min-width: 100%;'>"
        io.puts "<thead>"
        io.puts "<tr>"
        io.puts "<th>Typ</th>"
        io.puts "<th>Gerät</th>"
        io.puts "<th>Abmelden</th>"
        io.puts "</tr>"
        io.puts "</thead>"
        io.puts "<tbody>"
        get_sessions_for_user("lehrer.tablet@#{SCHUL_MAIL_DOMAIN}").each do |session|
            io.puts "<tr>"
            io.puts "<td>Lehrer-Tablet</td>"
            io.puts "<td>#{session[:user_agent]}</td>"
            io.puts "<td><button class='btn btn-xs btn-danger btn-purge-session' data-email='lehrer.tablet@#{SCHUL_MAIL_DOMAIN}' data-scrambled-sid='#{session[:scrambled_sid]}'>Abmelden</button></td>"
            io.puts "</tr>"
        end
        get_sessions_for_user("kurs.tablet@#{SCHUL_MAIL_DOMAIN}").each do |session|
            io.puts "<tr>"
            io.puts "<td>Kurs-Tablet (#{(session[:shorthands] || []).sort.join(', ')})</td>"
            io.puts "<td>#{session[:user_agent]}</td>"
            io.puts "<td><button class='btn btn-xs btn-danger btn-purge-session' data-email='kurs.tablet@#{SCHUL_MAIL_DOMAIN}' data-scrambled-sid='#{session[:scrambled_sid]}'>Abmelden</button></td>"
            io.puts "</tr>"
        end
        io.puts "</tbody>"
        io.puts "</table>"
        io.puts "</div>"
        io.puts "<h3 id='monitor'>Monitor</h3>"
        io.puts "<button class='btn btn-success bu-login-as-monitor'><i class='fa fa-sign-in'></i>&nbsp;&nbsp;Als Flur-Monitor anmelden</button>"
        io.puts "<button class='btn btn-success bu-login-as-monitor-sek'><i class='fa fa-sign-in'></i>&nbsp;&nbsp;Als Sek-Monitor anmelden</button>"
        io.puts "<button class='btn btn-success bu-login-as-monitor-lz'><i class='fa fa-sign-in'></i>&nbsp;&nbsp;Als LZ-Monitor anmelden</button>"
        io.puts "<div style='margin-top: 4px;'>"
        io.puts "<button class='btn btn-sm bu-allow-zeugniskonferenzen-monitor-flur'>Flur-Monitor: Zeugniskonferenzen</button>"
        io.puts "<button class='btn btn-sm bu-allow-zeugniskonferenzen-monitor-sek'>Sek-Monitor: Zeugniskonferenzen</button>"
        io.puts "<button class='btn btn-sm bu-allow-zeugniskonferenzen-monitor-lz'>LZ-Monitor: Zeugniskonferenzen</button>"
        io.puts "</div>"
        io.puts "<hr />"
        io.puts "<h3 id='bibliothek'>Bibliothek</h3>"
        io.puts "<button class='btn btn-success bu-login-as-bib-mobile'><i class='fa fa-sign-in'></i>&nbsp;&nbsp;Als Bibliotheks-Handy anmelden</button>"
        io.puts "<button class='btn btn-success bu-login-as-bib-station'><i class='fa fa-sign-in'></i>&nbsp;&nbsp;Als Bibliotheks-Station anmelden</button>"
        io.puts "<button class='btn btn-success bu-login-as-bib-station-with-printer'><i class='fa fa-sign-in'></i>&nbsp;&nbsp;Als Bibliotheks-Station mit Labeldrucker anmelden</button>"
        io.puts "<hr />"
        io.string
    end
end

#print_advent_calendar_css ⇒ Object 



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# File 'src/ruby/main.rb', line 2300

def print_advent_calendar_css
    return '' unless user_logged_in?
    permutation = [18,2,7,5,8,23,21,15,10,14,11,20,4,9,17,0,19,3,1,12,6,22,16,13]
    xo = [1,2,3,4,0.5,1.5,2.5,3.5,4.5,0,1,2,3,4,5,0.5,1.5,2.5,3.5,4.5,1,2,3,4]
    yo = [0,0,0,0,1,1,1,1,1,2,2,2,2,2,2,3,3,3,3,3,4,4,4,4]
    images = advent_calendar_images
    StringIO.open do |io|
        (0..23).each do |k|
            i = permutation[k]
            image = images[i]
            image = nil if i > advents_calendar_date_today() - 1
            io.puts ".door.door#{i} {"
            io.puts "    left: #{xo[k] * 17.5 + 0.5}vh;"
            io.puts "    top: #{yo[k] * 17.5 + 0.1}vh;"
            io.puts "    width: 17.5vh;"
            io.puts "    height: 17.5vh;"
            io.puts "}"
            io.puts ".door.door#{i} .flip-card-front {"
            io.puts "    background-image: url(/images/advent-calendar/doors/tiles-#{i}.png);"
            io.puts "    background-size: cover;"
            io.puts "}"
            io.puts ".door.door#{i} .flip-card-back {"
            io.puts "    background-image: url(#{images[i]});"
            io.puts "    background-size: cover;"
            io.puts "}"
        end
        io.puts "@media (orientation: portrait) {"
            (0..23).each do |k|
                i = permutation[k]
                io.puts ".door.door#{i} {"
                io.puts "    left: #{yo[k] * 18.277 + 0.1044}vw;"
                io.puts "    top: #{xo[k] * 18.277 + 0.5222}vw;"
                io.puts "    width: 18.277vw;"
                io.puts "    height: 18.277vw;"
                io.puts "}"
            end
        io.puts "}"
        io.string
    end
end

#print_advent_calendar_doors ⇒ Object 



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# File 'src/ruby/main.rb', line 2341

def print_advent_calendar_doors
    return '' unless user_logged_in?
    doors = get_open_doors_for_user()
    StringIO.open do |io|
        (0..23).each do |i|
            io.puts "<div data-door='#{i}' class='door door#{i} #{((doors >> i) & 1) > 0 ? 'open' : ''}'>"
            io.puts "<div class='flip-card-inner'>"
            io.puts "<div class='flip-card-front'></div>"
            io.puts "<div class='flip-card-back'></div>"
            io.puts "</div>"
            io.puts "</div>"
        end
        io.string
    end
end

#print_adventskalender_sidepanel ⇒ Object 



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# File 'src/ruby/main.rb', line 2392

def print_adventskalender_sidepanel()
    require_user!
    StringIO.open do |io|
        io.puts "<div class='col-lg-12 col-md-4 col-sm-6'>"
        io.puts "<div class='hint'>"
        io.puts "<div>Adventskalender</div>"
        io.puts "<hr />"
        io.puts "<button style='white-space: nowrap;' class='float-right btn btn-success bu-launch-adventskalender'>Adventskalender öffnen&nbsp;<i class='fa fa-angle-double-right'></i></button>"
        io.puts "<div style='clear: both;'></div>"
        io.puts "</div>"
        io.puts "</div>"
        io.string
    end
end

#print_all_kurse_untis ⇒ Object 



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# File 'src/ruby/include/admin.rb', line 344

def print_all_kurse_untis
    require_admin!
    StringIO.open do |io|
        count = 0
        @@klassen_order.each do |klasse|
            next unless ['11', '12'].include?(klasse)
            @@schueler_for_klasse[klasse].each do |email|
                @@kurse_for_schueler[email].each do |lesson_key|
                    count += 1
                    user = @@user_info[email]
                    parts = []
                    parts << "#{user[:last_name]}#{user[:first_name]}".gsub(' ', '').gsub('-', '').gsub(',', '')
                    parts << ""
                    parts << @@original_fach_for_lesson_key[lesson_key] || lesson_key
                    parts << ""
                    parts << "#{klasse}"
                    parts << ""
                    parts << ""
                    parts << ""
                    parts << ""
                    parts << ""
                    parts << @@original_fach_for_lesson_key[lesson_key] || lesson_key
                    parts << ""
                    parts << "1"
                    io.puts parts.map { |x| '"' + x + '"'}.join("\t")
                end
            end
        end
        io.string
    end
end

#print_all_lul_logo_didact ⇒ Object 



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# File 'src/ruby/include/admin.rb', line 401

def print_all_lul_logo_didact
    require_admin!
    StringIO.open do |io|
        @@lehrer_order.sort do |a, b|
            au = @@user_info[a]
            bu = @@user_info[b]
            au[:last_name].downcase <=> bu[:last_name].downcase
        end.each do |email|
            user = @@user_info[email]
            shorthand = user[:shorthand]
            shorthand = 'Mand' if shorthand == 'Man'
            io.puts "#{user[:last_name]};#{user[:first_name].strip.empty? ? user[:last_name] : user[:first_name]};#{shorthand}"
        end
        path = '/data/lehrer/extra-ldc-accounts.csv'
        if File.exist?(path)
            File.open(path) do |f|
                f.each_line do |line|
                    io.puts line
                end
            end
        end
        io.string
    end
end

#print_all_sus_logo_didact ⇒ Object 



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# File 'src/ruby/include/admin.rb', line 381

def print_all_sus_logo_didact
    require_admin!
    StringIO.open do |io|
        @@klassen_order.each do |klasse|
            @@schueler_for_klasse[klasse].each do |email|
                user = @@user_info[email]
                next if user[:geburtstag].nil?
                geburtstag = "#{user[:geburtstag][8, 2]}.#{user[:geburtstag][5, 2]}.#{user[:geburtstag][0, 4]}"
                io.puts "#{user[:last_name]};#{user[:first_name]};#{user[:klasse]};#{user[:geschlecht]};#{geburtstag}"
            end
        end
        io.string
    end
end

#print_all_sus_untis ⇒ Object 



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# File 'src/ruby/include/admin.rb', line 307

def print_all_sus_untis
    require_admin!
    StringIO.open do |io|
        count = 0
        @@klassen_order.each do |klasse|
            @@schueler_for_klasse[klasse].each do |email|
                count += 1
                user = @@user_info[email]
                parts = []
                parts << "#{user[:last_name]}#{user[:first_name]}".gsub(' ', '').gsub('-', '').gsub(',', '')
                parts << user[:last_name]
                parts << ""
                parts << ""
                parts << ""
                parts << ""
                parts << user[:geschlecht].upcase
                parts << user[:first_name]
                parts << "#{count}"
                parts << "#{user[:klasse]}"
                parts << "#{count}"
                parts << ""
                parts << "#{user[:geburtstag][0, 4]}#{user[:geburtstag][5, 2]}#{user[:geburtstag][8, 2]}"
                parts << ""
                # ["\"Mustermann\"", "\"Mustermann\"", "", "", "", "", "\"W\"", "\"Max\"", "\"1\"", "\"5a\"", "\"1\"", "", "\"19670101\"", "", "\r"]
                # io.puts "#{user[:last_name]}\t#{user[:first_name]}\t#{user[:klasse]}\t#{user[:geschlecht]}\t#{geburtstag}"
                io.puts parts.map { |x| '"' + x + '"'}.join("\t")
            end
        end
        io.string
    end
end

#print_all_users ⇒ Object 



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# File 'src/ruby/include/admin.rb', line 292

def print_all_users
    require_admin!
    StringIO.open do |io|
        @@user_info.keys.sort.each do |email|
            io.puts "#{email} #{@@user_info[email][:nc_login]} #{@@user_info[email][:display_name]}"
        end
        io.string
    end
end

#print_all_users_informatik_biber ⇒ Object 



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# File 'src/ruby/include/admin.rb', line 675

def print_all_users_informatik_biber
    require_admin!
    StringIO.open do |io|
        @@klassen_order.each do |klasse|
            @@schueler_for_klasse[klasse].each do |email|
                user = @@user_info[email]
                biber_user_id = email
                biber_password = user[:biber_password]
                io.puts "#{Main.tr_klasse(user[:klasse])};#{user[:klasse].to_i};#{user[:first_name]};#{user[:last_name]};#{biber_user_id};#{biber_password};#{user[:geschlecht] == 'm' ? 'male' : 'female'}"
            end
        end
        @@klassen_order.each do |klasse|
            io.puts
            io.puts "Informatik-Biber Klasse #{Main.tr_klasse(klasse)}"
            io.puts '-' * "Informatik-Biber Klasse #{Main.tr_klasse(klasse)}".size
            io.puts
            io.puts "Anmeldung mit schulischer E-Mail-Adresse und 4-stelligem Passwort"
            io.puts
            @@schueler_for_klasse[klasse].each do |email|
                user = @@user_info[email]
                biber_user_id = email
                biber_password = user[:biber_password]
                io.puts "#{biber_password} #{user[:email]}"
            end
        end
        io.string
    end
end

#print_current_monitor_advent_calendar_images ⇒ Object 



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# File 'src/ruby/main.rb', line 2357

def print_current_monitor_advent_calendar_images()
    images = advent_calendar_images
    today = advents_calendar_date_today()
    StringIO.open do |io|
        d = advents_calendar_date_today() - 4
        d = 0 if d < 0
        d = 19 if d > 19
        (0..4).each do |x|
            i = d + x
            url = "/images/advent-calendar/doors/tiles-#{i}.png"
            if i <= today - 1
                url = images[i]
            end
            io.puts "<img src='#{url}' />"
        end
        io.string
    end
end

#print_current_polls ⇒ Object 



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# File 'src/ruby/include/poll.rb', line 879

def print_current_polls()
    require_user!
    today = Date.today.strftime('%Y-%m-%d')
    now = Time.now.strftime('%Y-%m-%dT%H:%M:%S')
    email = @session_user[:email]
    entries = neo4j_query(<<~END_OF_QUERY, :email => email, :today => today).map { |x| {:poll_run => x['pr'], :poll_title => x['p.title'], :organizer => x['a.email'], :hidden => x['hidden'] } }
        MATCH (u:User {email: $email})-[rt:IS_PARTICIPANT]->(pr:PollRun)-[:RUNS]->(p:Poll)-[:ORGANIZED_BY]->(a:User)
        WHERE COALESCE(rt.deleted, false) = false
        AND COALESCE(pr.deleted, false) = false
        AND COALESCE(p.deleted, false) = false
        AND $today >= pr.start_date
        AND $today <= pr.end_date
        RETURN pr, p.title, a.email, COALESCE(rt.hide, FALSE) AS hidden
        ORDER BY pr.end_date, pr.end_time;
    END_OF_QUERY
    entries.select! do |entry|
        pr = entry[:poll_run]
        now >= "#{pr[:start_date]}T#{pr[:start_time]}:00" && now <= "#{pr[:end_date]}T#{pr[:end_time]}:00"
    end
    return '' if entries.empty?
    hidden_entries = entries.select { |x| x[:hidden] }
    StringIO.open do |io|
        io.puts "<div class='col-lg-12 col-md-4 col-sm-6'>"
        unless hidden_entries.empty?
            io.puts "<div class='hint hint_poll_hidden_indicator'>"
            io.puts "Ausgeblendete Umfragen: #{hidden_entries.map { |x| x[:poll_title] }.join(', ')} <a id='show_hidden_polls' href='#'>(anzeigen)</a>"
            io.puts "</div>"
        end
        entries.each.with_index do |entry, _|
            io.puts "<div class='hint hint_poll' style='#{entry[:hidden] ? 'display: none;': ''}'>"
            poll_title = entry[:poll_title]
            poll_run = entry[:poll_run]
            organizer = entry[:organizer]
            io.puts "<div style='float: left; width: 36px; height: 36px; margin-right: 15px; position: relative; top: 5px; left: 4px;'>"
            io.puts user_icon(organizer, 'avatar-fill')
            io.puts "</div>"
            io.puts "<div>#{@@user_info[organizer][:display_name_official]} hat #{teacher_logged_in? ? 'Sie' : 'dich'} zu einer Umfrage eingeladen: <strong>#{poll_title}</strong>. #{teacher_logged_in? ? 'Sie können' : 'Du kannst'} bis zum #{Date.parse(poll_run[:end_date]).strftime('%d.%m.%Y')} um #{poll_run[:end_time]} Uhr teilnehmen (die Umfrage <span class='moment-countdown' data-target-timestamp='#{poll_run[:end_date]}T#{poll_run[:end_time]}:00' data-before-label='läuft noch' data-after-label='ist vorbei'></span>).</div>"
            io.puts "<hr />"
            io.puts "<button style='white-space: nowrap;' class='float-right btn btn-success bu-launch-poll' data-poll-run-id='#{poll_run[:id]}'>Zur Umfrage&nbsp;<i class='fa fa-angle-double-right'></i></button>"
            io.puts "<div style='clear: both;'></div>"
            io.puts "</div>"
        end
        io.puts "</div>"
        io.string
    end
end

#print_email_accounts ⇒ Object 



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# File 'src/ruby/include/admin.rb', line 454

def print_email_accounts()
    require_admin!
    StringIO.open do |io|
        all_marked_known = Set.new
        all_termination_dates = {}
        neo4j_query('MATCH (n:KnownEmailAddress) RETURN n;').each do |row|
            info = row['n']
            email = info[:email]
            if info[:known]
                all_marked_known << email
            end
            if info[:scheduled_termination]
                all_termination_dates[email] = info[:scheduled_termination]
            end
        end

        Set.new(neo4j_query('MATCH (n:KnownEmailAddress {known: true}) RETURN n.email;').map { |x| x['n.email'] })
        email_addresses = @@current_email_addresses
        required_email_addresses = []
        data_for_required_email_address = {}
        @@user_info.each_pair do |email, info|
            next unless email.include?(SMTP_DOMAIN)
            required_email_addresses << email
            if info[:teacher]
                data_for_required_email_address[email] = {
                    :first_name => info[:first_name],
                    :last_name => info[:last_name],
                    :email => email,
                    :password => Main.gen_password_for_email(email)
                }
            else
                data_for_required_email_address[email] = {
                    :first_name => info[:first_name],
                    :last_name => info[:last_name],
                    :email => email,
                    :password => Main.gen_password_for_email(email)
                }
                eltern_email = "eltern.#{email}"
                required_email_addresses << eltern_email
                data_for_required_email_address[eltern_email] = {
                    :first_name => '',
                    :last_name => info[:last_name],
                    :email => eltern_email,
                    :password => Main.gen_password_for_email(eltern_email)
                }
            end
        end
        @@klassen_order.each do |klasse|
            email = "ev.#{klasse}@#{SCHUL_MAIL_DOMAIN}"
            data_for_required_email_address[email] = {
                :first_name => '',
                :last_name => "Elternvertreter:innen #{klasse}",
                :email => email,
                :password => Main.gen_password_for_email(email + Date.today.year.to_s)
            }
        end
        @@mailing_lists.keys.each { |email| required_email_addresses << email }
        @@klassen_order.each do |klasse|
            required_email_addresses << "ev.#{klasse}@#{SCHUL_MAIL_DOMAIN}"
        end

        known_email_association = {}
        email_addresses.each do |email|
            if @@user_info.include?(email)
                if @@user_info[email][:teacher]
                    known_email_association[email] = :teacher
                else
                    known_email_association[email] = :sus
                end
            elsif email[0, 7] == 'eltern.' && @@user_info.include?(email.sub('eltern.', ''))
                known_email_association[email] = :parents
            elsif @@mailing_lists.include?(email)
                known_email_association[email] = :mailing_list
            elsif email[0, 3] == 'ev.' && @@klassen_order.include?(email.split('@').first.sub('ev.', ''))
                known_email_association[email] = :ev
            end
        end
        required_email_addresses = (Set.new(required_email_addresses) - Set.new(email_addresses)).to_a.sort
        unknown_addresses = email_addresses.reject { |email| known_email_association.include?(email) }
        io.puts "<h3>Fehlende Postfächer</h3>"

        # io.puts "<table class='table'>"
        # io.puts "<tr><th>E-Mail-Adresse</th></tr>"
        # required_email_addresses.each do |email|
        #     io.puts "<tr>"
        #     io.puts "<td>#{email}</td>"
        #     io.puts "</tr>"
        # end
        # io.puts "</table>"
        io.puts "<pre>"
        required_email_addresses.each do |email|
            if data_for_required_email_address[email]
                io.puts data_for_required_email_address[email].to_json + ','
            else
                io.puts "// no data for #{email}"
            end
        end
        io.puts "</pre>"

        io.puts "<hr />"

        today_str = Date.today.strftime('%Y-%m-%d')
        [false, true].each do |known|
            if known
                io.puts "<h3>Bekannte Postfächer</h3>"
            else
                io.puts "<h3>Unbekannte / nicht mehr benötigte Postfächer</h3>"
            end
            io.puts "<table class='table'>"
            io.puts "<tr><th>E-Mail-Adresse</th><th></th></tr>"
            unknown_addresses.sort.each do |email|
                next unless all_marked_known.include?(email) == known
                io.puts "<tr>"
                classes = ''
                if all_termination_dates[email]
                    if (today_str <= all_termination_dates[email])
                        classes = 'bg-warning'
                    else
                        classes = 'bg-danger'
                    end
                end
                io.puts "<td class='#{classes}'>"
                io.puts "#{email}"
                if all_termination_dates[email]
                    io.puts "(Löschung zum #{all_termination_dates[email]})"
                end
                io.puts "<td>"
                io.puts "<td>"
                if known
                    io.puts "<button class='btn btn-xs btn-warning bu-mark-unknown-address' data-email='#{email}'>Unbekannt</button>"
                else
                    io.puts "<button class='btn btn-xs btn-success bu-mark-known-address' data-email='#{email}'>Bekannt</button>"
                    unless all_termination_dates[email]
                        io.puts "<button class='btn btn-xs btn-danger bu-mark-for-termination' data-email='#{email}' data-weeks='4'>Löschen in 4 Wochen</button>"
                        io.puts "<button class='btn btn-xs btn-danger bu-mark-for-termination' data-email='#{email}' data-weeks='1'>Löschen in 1 Woche</button>"
                    end
                end
                if all_termination_dates[email]
                    io.puts "<button class='btn btn-xs btn-warning bu-unmark-for-termination' data-email='#{email}'>Nicht löschen</button>"
                end
            io.puts "</td>"
                io.puts "</tr>"
            end
            io.puts "</table>"

            io.puts "<hr />"
        end
        io.string
    end
end

#print_email_field(io, email) ⇒ Object 



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# File 'src/ruby/main.rb', line 1998

def print_email_field(io, email)
    io.puts "<div class='input-group'><input type='text' class='form-control' readonly value='#{email}' style='min-width: 100px;' /><div class='input-group-append'><button class='btn btn-secondary btn-clipboard' data-clipboard-action='copy' title='Eintrag in die Zwischenablage kopieren' data-clipboard-text='#{email}'><i class='fa fa-clipboard'></i></button></div></div>"
end

#print_gev_table ⇒ Object 



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# File 'src/ruby/include/gev.rb', line 3

def print_gev_table()
    assert(gev_logged_in?)
    temp = neo4j_query(<<~END_OF_QUERY).map { |x| { :email => x['u.email'], :name => x['u.ev_name'] } }
        MATCH (u:User {ev: true})
        RETURN u.email, u.ev_name;
    END_OF_QUERY
    gev = Set.new()
    name_for_email = {}
    temp.each do |row|
        gev << row[:email]
        name_for_email[row[:email]] = row[:name]
    end
    gev.each do |email|
        if @@user_info[email].nil?
            GEV_USERS.each do |gev_email|
                deliver_mail do
                    to gev_email
                    bcc SMTP_FROM
                    from SMTP_FROM

                    subject "Elternsprecher entfernt"

                    StringIO.open do |io|
                        io.puts "<p>Hallo!</p>"
                        io.puts "<p>Die Eltern von #{email} (#{name_for_email[email]}) wurden als Elternsprecher entfernt, da die Schülerin / der Schüler nicht mehr an der Schule ist.</p>"
                        io.puts "<p>Viele Grüße,<br />#{WEBSITE_MAINTAINER_NAME}</p>"
                        io.string
                    end
                end
            end
            temp = neo4j_query(<<~END_OF_QUERY, {:email => email})
                MATCH (u:User {email: $email})
                REMOVE u.ev
                REMOVE u.ev_name;
            END_OF_QUERY
            gev.delete(email)
        end
    end
    gev = gev.to_a.sort do |a, b|
        (@@user_info[a][:klasse] == @@user_info[b][:klasse]) ?
        (@@user_info[a][:last_name] <=> @@user_info[b][:last_name]) :
        ((KLASSEN_ORDER.index(@@user_info[a][:klasse]) || 0) <=> (KLASSEN_ORDER.index(@@user_info[b][:klasse]) || 0))
    end
    StringIO.open do |io|
        io.puts "<div style='max-width: 100%; overflow-x: auto;'>"
        io.puts "<table class='table table-condensed table-striped narrow' style='width: unset; min-width: 100%;'>"
        io.puts "<thead>"
        io.puts "<tr>"
        io.puts "<th>Elternvertreter:innen</th>"
        io.puts "<th>Klasse</th>"
        io.puts "<th>Name</th>"
        io.puts "<th></th>"
        io.puts "</tr>"
        io.puts "</thead>"
        io.puts "<tbody>"
        gev.each do |email|
            io.puts "<tr class='user_row' data-email='#{email}'>"
            user = @@user_info[email]
            io.puts "<td>Eltern von #{user[:display_name]}</td>"
            io.puts "<td>#{tr_klasse(user[:klasse])}</td>"
            io.puts "<td><input type='text' class='form-control ti_name' value='#{name_for_email[email]}'/></td>"
            io.puts "<td><button class='btn btn-xs btn-danger bu-remove-ev'><i class='fa fa-trash'></i>&nbsp;&nbsp;Löschen</button></td>"
        io.puts "</tr>"
        end
        io.puts "</tbody>"
        io.puts "</table>"
        io.puts "</div>"
        io.string
    end
end

#print_lehrbuchverein_table ⇒ Object 



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# File 'src/ruby/include/lehrbuchverein.rb', line 46

def print_lehrbuchverein_table()
    assert(can_manage_bib_members_logged_in? || can_manage_bib_payment_logged_in?)
    temp = neo4j_query(<<~END_OF_QUERY).map { |x| { :email => x['u.email'] } }
        MATCH (u:User {lmv_no_pay: true})
        RETURN u.email;
    END_OF_QUERY
    no_pay = Set.new()
    temp.each do |row|
        no_pay << row[:email]
    end
    temp = neo4j_query(<<~END_OF_QUERY, {:jahr => LEHRBUCHVEREIN_JAHR}).map { |x| { :email => x['u.email'] } }
        MATCH (u:User)-[:PAID_FOR]->(j:Lehrbuchvereinsjahr {jahr: $jahr})
        RETURN u.email;
    END_OF_QUERY
    paid = Set.new()
    temp.each do |row|
        paid << row[:email]
    end
    StringIO.open do |io|
        io.puts "<div style='max-width: 100%; overflow-x: auto;'>"
        io.puts "<table class='table table-condensed table-striped narrow' style='width: unset; min-width: 100%;'>"
        io.puts "<thead>"
        io.puts "<tr>"
        io.puts "<th>Name</th>"
        io.puts "<th>Vorname</th>"
        io.puts "<th>Klasse</th>"
        if can_manage_bib_members_logged_in?
            io.puts "<th>Bezahlt für #{LEHRBUCHVEREIN_JAHR}/#{(LEHRBUCHVEREIN_JAHR % 100) + 1}</th>"
            io.puts "<th>Zahlungsbefreit</th>"
            io.puts "<th>Selbstzahler</th>"
        end
        io.puts "</tr>"
        io.puts "</thead>"
        io.puts "<tbody>"
        all_schueler = []
        @@klassen_order.each do |klasse|
            (@@schueler_for_klasse[klasse] || []).each do |email|
                all_schueler << email
            end
        end
        # all_schueler.sort! do |a, b|
        #     @@user_info[a][:last_name] == @@user_info[b][:last_name] ?
        #     (@@user_info[a][:first_name] <=> @@user_info[b][:first_name]) :
        #     (@@user_info[a][:last_name] <=> @@user_info[b][:last_name])
        # end
        all_schueler.each do |email|
            unless can_manage_bib_members_logged_in?
                next unless mitglieder.include?(email)
            end
            state = 0
            state += 1 if paid.include?(email)
            state += 2 if no_pay.include?(email)
            # state += 4 if [5, 6].include?(((@@user_info[email] || {})[:klasse] || '').to_i)
            io.puts "<tr class='user_row' data-email='#{email}'>"
            user = @@user_info[email]
            io.puts "<td>#{user[:last_name]}</td>"
            io.puts "<td>#{user[:first_name]}</td>"
            io.puts "<td>#{tr_klasse(user[:klasse])}</td>"
            if can_manage_bib_members_logged_in?
                io.puts "<td>"
                io.puts "<button class='btn btn-xs #{((state >> 0) & 1) == 1 ? 'btn-success' : 'btn-outline-secondary'} bu_toggle_paid'>bezahlt für #{LEHRBUCHVEREIN_JAHR}/#{(LEHRBUCHVEREIN_JAHR % 100) + 1}</button>"
                io.puts "</td>"
                io.puts "<td>"
                io.puts "<button class='btn btn-xs #{(((state >> 1) & 1) == 1) || (((state >> 2) & 1) == 1) ? 'btn-primary' : 'btn-outline-secondary'} bu_toggle_no_pay' #{state & 4 == 4 ? 'disabled' : ''}>zahlungsbefreit</button>"
                io.puts "</td>"
                io.puts "<td>"
                io.puts "<button class='btn btn-xs #{state == 0 ? 'btn-danger' : 'btn-outline-secondary'} bu_no_book_for_you disabled'>Selbstzahler</button>"
                io.puts "</td>"
            end
        io.puts "</tr>"
        end
        io.puts "</tbody>"
        io.puts "</table>"
        io.puts "</div>"
        io.string
    end
end

#print_lehrerzimmer_panel ⇒ Object 



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# File 'src/ruby/main.rb', line 2006

def print_lehrerzimmer_panel()
    require_user!
    return '' unless teacher_logged_in?
    return '' if teacher_tablet_logged_in?
    StringIO.open do |io|
        io.puts "<div class='col-lg-12 col-md-4 col-sm-6'>"
        io.puts "<div class='hint lehrerzimmer-panel'>"
        io.puts "<div class='hide-sm'>"
        io.puts "<div style='padding-top: 7px;'>Momentan im Jitsi-Lehrerzimmer:&nbsp;"
        rooms = current_jitsi_rooms()
        nobody_here = true
        users = []
        if rooms
            rooms.each do |room|
                if room['roomName'] == 'lehrerzimmer'
                    room['participants'].sort do |a, b|
                        a['displayName'].downcase.sub('herr', '').sub('frau', '').sub('dr.', '').strip <=> b['displayName'].downcase.sub('herr', '').sub('frau', '').sub('dr.', '').strip
                    end.each do |participant|
                        email = participant['email']
                        users << email
                        if @@user_info[email] && @@user_info[email][:teacher]
                            io.puts "<span class='btn btn-xs ttc'>#{@@user_info[email][:shorthand]}</span>"
                            nobody_here = false
                        end
                    end
                end
            end
        end
        if nobody_here
            io.puts "<em>niemand</em>"
        end
        io.puts "</div>"
        io.puts "<hr />"
        io.puts "</div>"
        io.puts "<div class='hide-non-sm'>"
        users.each do |email|
            if @@user_info[email] && @@user_info[email][:teacher]
#                     io.puts "<span class='btn btn-xs ttc'>#{@@user_info[email][:shorthand]}</span>"
                io.puts "<div style='margin-right: 5px; display: inline-block; position: relative; top: 5px; background-image: url(#{NEXTCLOUD_URL}/index.php/avatar/#{@@user_info[email][:nc_login]}/128), url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mO88h8AAq0B1REmZuEAAAAASUVORK5CYII=);' class='avatar-md'></div>"
            end
        end
        io.puts "</div>"
        io.puts "<a href='/jitsi/Lehrerzimmer' target='_blank' style='white-space: nowrap;' class='float-right btn btn-success'><i class='fa fa-microphone'></i>&nbsp;&nbsp;Lehrerzimmer&nbsp;<i class='fa fa-angle-double-right'></i></a>"
        io.puts "<div style='clear: both;'></div>"
        io.puts "</div>"
        io.puts "</div>"
        io.string
    end
end

#print_lesson_keys_history ⇒ Object 



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# File 'src/ruby/include/admin.rb', line 240

def print_lesson_keys_history
    require_admin!
    StringIO.open do |io|
        start_dates = @@lessons[:timetables].keys.sort
        data = {}
        start_dates.each do |start_date|
            @@lessons[:timetables][start_date].each_pair do |lesson_key, info|
                info[:stunden].each_pair do |dow, info2|
                    info2.each_pair do |stunde, info3|
                        klassen = info3[:klassen]
                        lehrer = info3[:lehrer]
                        fach = @@lessons[:lesson_keys][lesson_key][:fach]
                        klassen.each do |klasse|
                            data[klasse] ||= {}
                            data[klasse][fach] ||= {}
                            data[klasse][fach][start_date] ||= {}
                            lehrer.each do |l|
                                data[klasse][fach][start_date][l] = true
                            end
                        end
                    end
                end
            end
        end
        KLASSEN_ORDER.each do |klasse|
            next if klasse.to_i > 10
            io.puts "<h3>Klasse #{tr_klasse(klasse)}</h3>"
            io.puts "<table class='table table-condensed table-striped table-sm'>"
            io.puts "<thead>"
            io.puts "<tr>"
            io.puts "<th>ab</th>"
            data[klasse].keys.sort.each do |fach|
                io.puts "<th>#{fach}</th>"
            end
            io.puts "</tr>"
            io.puts "</thead>"
            io.puts "<tbody>"
            start_dates.each do |start_date|
                io.puts "<tr>"
                io.puts "<td>#{start_date}</td>"
                data[klasse].keys.sort.each do |fach|
                    io.puts "<td>#{(data[klasse][fach][start_date] || {'-' => true}).keys.sort.join(', ')}</td>"
                end
                io.puts "</tr>"
            end
            io.puts "</tbody>"
            io.puts "</table>"
        end
        io.string
    end
end

#print_login_ranking ⇒ Object 



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# File 'src/ruby/include/stats.rb', line 91

def ()
    stats = ()
    klassen_stats = {}
    @@klassen_order.each do |klasse|
        klassen_stats[klasse] = 100 * stats[klasse][:count][LOGIN_STATS_D.last].to_f / stats[klasse][:total]
        if stats[klasse][:count][LOGIN_STATS_D.last] == stats[klasse][:total]
            neo4j_query(<<~END_OF_QUERY, :klasse => klasse, :timestamp => Time.now.to_i)
                MERGE (n:KlasseKomplett {klasse: $klasse})
                ON CREATE SET n.timestamp = $timestamp
            END_OF_QUERY
        end
    end
    klassen_ranking = neo4j_query(<<~END_OF_QUERY).map { |x| x['n.klasse'] }
        MERGE (n:KlasseKomplett)
        RETURN n.klasse
        ORDER BY n.timestamp ASC;
    END_OF_QUERY
    now = Time.now.to_i
    StringIO.open do |io|
        io.puts "<p style='text-align: center;'>"
        io.puts "<em>Die ersten Klassen sind komplett im Dashboard angemeldet.<br />Herzlichen Glückwunsch an die Klassen #{join_with_sep(klassen_ranking.map { |x| '<b>' + (tr_klasse(x) || '') + '</b>' }, ', ', ' und ')}!</em>"
        io.puts "</p>"
        klassen_stats.keys.sort do |a, b|
            va = sprintf('%020d%020d', 1000 - (klassen_ranking.index(a) || 1000), klassen_stats[a] * 1000)
            vb = sprintf('%020d%020d', 1000 - (klassen_ranking.index(b) || 1000), klassen_stats[b] * 1000)
            vb <=> va
        end.each.with_index do |klasse, index|
            place = "#{index + 1}."
            percent = klassen_stats[klasse]
            bgcol = get_gradient(['#cc0000', '#f4951b', '#ffe617', '#80bc42'], percent / 100.0)
            c = ''
            star_span = ''
            if stats[klasse][:count][LOGIN_STATS_D.last] == stats[klasse][:total]
                c = 'complete'
                star_span = "<i class='fa fa-star'></i>"
            else
                place = ''
            end
            io.puts "<span class='ranking #{c}' style='background-color: #{bgcol};'>#{star_span}<span class='klasse'>#{tr_klasse(klasse)}</span><span class='percent'>#{percent.to_i}%</span>"
            io.puts "<span class='place'>#{place}</span>" unless place.empty?
            io.puts "</span>"
        end
        io.string
    end
end

#print_mailing_list(io, list_email) ⇒ Object 



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# File 'src/ruby/include/directory.rb', line 641

def print_mailing_list(io, list_email)
    return unless @@mailing_lists.include?(list_email)
    io.puts "<tr class='user_row'>"
    info = @@mailing_lists[list_email]
    io.puts "<td class='list_email_label'>#{info[:label]}</td>"
    io.puts "<td>"
    print_email_field(io, list_email)
    io.puts "</td>"
    io.puts "<td style='text-align: right;'><button data-list-email='#{list_email}' class='btn btn-warning btn-sm bu-toggle-adresses'>#{info[:recipients].size} Adressen&nbsp;&nbsp;<i class='fa fa-chevron-down'></i></button></td>"
    io.puts "</tr>"
    io.puts "<tbody style='display: none;' class='list_email_emails' data-list-email='#{list_email}'>"
    info[:recipients].sort do |a, b|
        an = ((@@user_info[a.sub(/^eltern\./, '')] || {})[:display_name] || '').downcase
        bn = ((@@user_info[b.sub(/^eltern\./, '')] || {})[:display_name] || '').downcase
        an <=> bn
    end.each do |email|
        name = (@@user_info[email] || {})[:display_name] || ''
        if email[0, 7] == 'eltern.'
            name = (@@user_info[email.sub('eltern.', '')] || {})[:display_name] || ''
            name = "Eltern von #{name}"
        end
        io.puts "<tr class='user_row'>"
        io.puts "<td>#{name}</td>"
        io.puts "<td colspan='2'>"
        print_email_field(io, email)
        io.puts "</td>"
        io.puts "</tr>"
    end
    io.puts "</tbody>"
end

#print_mailing_lists ⇒ Object 



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# File 'src/ruby/include/directory.rb', line 672

def print_mailing_lists()
    StringIO.open do |io|
        io.puts "<table class='table table-condensed narrow' style='width: unset; min-width: 100%;'>"
        remaining_mailing_lists = Set.new(@@mailing_lists.keys)
        @@klassen_order.each do |klasse|
            io.puts "<tr><th colspan='3'>Klasse #{tr_klasse(klasse)}</th></tr>"
            ["klasse.#{klasse}@#{SCHUL_MAIL_DOMAIN}",
             "eltern.#{klasse}@#{SCHUL_MAIL_DOMAIN}",
             "lehrer.#{klasse}@#{SCHUL_MAIL_DOMAIN}"].each do |list_email|
                print_mailing_list(io, list_email)
                remaining_mailing_lists.delete(list_email)
            end
            if ['11', '12'].include?(klasse)
                ['gr', 'it'].each do |group_af|
                    ['', '.eltern'].each do |extra|
                        list_email = "antikenfahrt.#{group_af}#{extra}.#{klasse}@#{SCHUL_MAIL_DOMAIN}"
                        if @@mailing_lists[list_email]
                            print_mailing_list(io, list_email)
                            remaining_mailing_lists.delete(list_email)
                        end
                    end
                end
            end
        end
        io.puts "<tr><th colspan='3'>Klassenleiter-Teams</th></tr>"
        [5, 6, 7, 8, 9, 10].each do |klasse|
            list_email = "team.#{klasse}@mail.gymnasiumsteglitz.de"
            print_mailing_list(io, list_email)
            remaining_mailing_lists.delete(list_email)
        end
        print_mailing_list(io, "kl@#{SCHUL_MAIL_DOMAIN}")
        remaining_mailing_lists.delete("kl@#{SCHUL_MAIL_DOMAIN}")
        io.puts "<tr><th colspan='3'>Gesamte Schule</th></tr>"
        ["sus@#{SCHUL_MAIL_DOMAIN}",
         "eltern@#{SCHUL_MAIL_DOMAIN}",
         "lehrer@#{SCHUL_MAIL_DOMAIN}"].each do |list_email|
            print_mailing_list(io, list_email)
            remaining_mailing_lists.delete(list_email)
        end
        unless remaining_mailing_lists.empty?
            io.puts "<tr><th colspan='3'>Weitere E-Mail-Verteiler</th></tr>"
            remaining_mailing_lists.to_a.sort.each do |list_email|
                print_mailing_list(io, list_email)
            end
        end
        io.puts "</table>"
        io.string
    end
end

#print_mailing_lists_allowed_senders ⇒ Object 



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# File 'src/ruby/include/directory.rb', line 722

def print_mailing_lists_allowed_senders()
    StringIO.open do |io|
        io.puts "<table class='table table-condensed narrow' style='width: unset; min-width: 100%;'>"
        io.puts "<tr>"
        io.puts "<th>Name</th>"
        io.puts "<th>E-Mail-Adresse</th>"
        io.puts "<th>Berechtigung</th>"
        io.puts "</tr>"
        io.puts "</table>"
        io.string
    end
end

#print_maze_defs ⇒ Object 



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# File 'src/ruby/include/cypher.rb', line 718

def print_maze_defs()
    room_heights = [
        [1, 1, 1],
        [1, 2, 2],
        [1, 3, 2],
        [2, 5, 4],
        [1, 4, 3],
        [1, 3, 2],
        [2, 5, 3],
        [1, 4, 2],
        [2, 3, 2],
        [1, 2, 1],
    ]
    StringIO.open do |io|
        font = JSON.parse(File.read('maze-font-processed.json'))
        cypher_content()
        word = @cypher_next_password.upcase.gsub(/[^A-Z]/, '')
        bitmap = []
        depth = 7
        width = 1
        height = 1
        z0 = 1
        z1 = 3
        tz = 2
        x0 = nil
        x1 = nil
        y0 = nil
        y1 = nil
        sections = []
        tunnel_length = 16
        [:test, :for_real].each do |mode|
            ox = 0
            oy = 0
            if mode == :for_real
                x0 -= 1
                y0 -= 1
                x1 += 1
                y1 += 1
                width = x1 - x0 + 1
                height = y1 - y0 + 1
                (0...depth).each do |z|
                    level = []
                    (0...height).each do |y|
                        level << '1' * width
                    end
                    bitmap << level
                end
            end
            (0...word.size).each do |i0|
                z0 = room_heights[i0][0]
                z1 = room_heights[i0][1]
                tz = room_heights[i0][2]
    
                i1 = i0 + 1
                c0 = word[i0]
                c1 = word[i1]
                font[c0]['cells'].each do |pair|
                    x = pair[0] + ox
                    y = pair[1] + oy
                    if mode == :test
                        x0 ||= x
                        x0 = x if x < x0
                        x1 ||= x
                        x1 = x if x > x1
                        y0 ||= y
                        y0 = y if y < y0
                        y1 ||= y
                        y1 = y if y > y1
                    else
                        (z0..z1).each do |z|
                            bitmap[z][y - y0][x - x0] = '0'
                            if z == tz
                                if i0 == 0
                                    if x - ox == font[c0]['entry'][0] && y - oy == font[c0]['entry'][1]
                                        bitmap[z][y - y0][x - x0] = 'A'
                                    end
                                    if x - ox - 1 == font[c0]['entry'][0] && y - oy == font[c0]['entry'][1]
                                        bitmap[z][y - y0][x - x0] = 'B'
                                    end
                                end
                                if x - ox == font[c0]['exit'][0] && y - oy == font[c0]['exit'][1]
                                    if i0 > 0
                                        sections << x - x0 - tunnel_length + 2 if mode == :for_real
                                    end
                                    sections << x - x0 + 1 if mode == :for_real
                                end
                            end
                        end
                    end
                end
                if i1 < word.size
                    (1...tunnel_length).each do |dx|
                        x = font[c0]['exit'][0] + dx + ox
                        y = font[c0]['exit'][1] + oy
                        if mode == :for_real
                            bitmap[tz][y - y0][x - x0] = '0'
                        end
                    end
                    ox += font[c0]['exit'][0] - font[c1]['entry'][0] + tunnel_length
                    oy += font[c0]['exit'][1] - font[c1]['entry'][1]
                end
            end
        end
        sections << bitmap[0][0].size
        io.puts '<script type="text/plain" id="level">'
        bitmap.each do |level|
            level.each do |row|
                row.each_char do |c|
                    if c == '0'
                        io.print ((0...13).to_a.sample + 'a'.ord).chr
                    elsif c == '1'
                        io.print ((0...13).to_a.sample + 13 + 'a'.ord).chr
                    else
                        io.print c
                    end
                end
                io.puts
            end
            io.puts
        end
        io.puts "</script>"
        io.puts '<script type="text/plain" id="level_sectors">'
        io.puts sections.to_json
        io.puts "</script>"
        io.string
    end
end

#print_password_field(io, password) ⇒ Object 



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# File 'src/ruby/main.rb', line 2002

def print_password_field(io, password)
    io.puts "<div class='input-group'><input type='password' class='form-control' readonly value='#{password}' style='min-width: 50px;' /><div class='input-group-append'><button class='btn btn-secondary btn-clipboard' data-clipboard-action='copy' title='Eintrag in die Zwischenablage kopieren' data-clipboard-text='#{password}'><i class='fa fa-clipboard'></i></button></div></div>"
end

#print_public_event_table ⇒ Object 



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# File 'src/ruby/include/public_event.rb', line 186

def print_public_event_table()
    self.class.refresh_public_event_config()
    ts = Time.now.strftime("%Y-%m-%dT%H:%M")
    StringIO.open do |io|
        @@public_event_config.each.with_index do |event, event_index|
            if event_index > 0
                io.puts "<hr />"
            end
            io.puts "<h3>#{event[:title]}</h3>"
            if event[:description]
                io.puts event[:description]
            end
            sign_ups = get_sign_ups_for_public_event(event[:key])
            if event[:auto_rows]
                io.puts "<div class='table-responsive' style='max-width: 100%; overflow-x: auto;' data-event-key='#{event[:key]}'>"
                io.puts "<div style='display: none;' class='event-title'>#{event[:title]}</div>"
                io.puts "<table class='table table-narrow narrow th-middle'>"
                colspan = 1
                io.puts "<colgroup>"
                io.puts "<col style='width: 180px;'/>"
                colspan.times do
                    io.puts "<col style='width: auto;'/>"
                end
                io.puts "</colgroup>"
                io.puts "<tbody>"
                if event[:headings]
                    io.puts "<tr>"
                    io.puts "<th>#{event[:headings][0]}</th>"
                    io.puts "<th colspan='#{colspan}'>#{event[:headings][1]}</th>"
                    io.puts "</tr>"
                end
                event[:rows].each do |row|
                    printed_row = false
                    row[:entries].each do |entry|
                        text = (event[:booking_text] || '').dup
                        while true
                            index = text.index('{')
                            break if index.nil?
                            length = 1
                            balance = 1
                            while index + length < text.size && balance > 0
                                c = text[index + length]
                                balance -= 1 if c == '}'
                                balance += 1 if c == '{'
                                length += 1
                            end
                            code = text[index + 1, length - 2]
                            begin
                                text[index, length] = eval(code).to_s || ''
                            rescue
                                debug "Error while evaluating for #{(@session_user || {})[:email]}:"
                                debug code
                                raise
                            end
                        end
                        if entry[:deadline]
                            next if ts > entry[:deadline]
                        end
                        booked_out = false
                        if (sign_ups[entry[:key]] || []).size >= (entry[:capacity] || 0)
                            booked_out = true
                        end
                        unless printed_row
                            io.puts "<tr>"
                            io.puts "<th>#{row[:description]}</th>"
                            io.puts "<td>"
                            printed_row = true
                        end
                        io.puts "<button data-event-key='#{event[:key]}' data-key='#{entry[:key]}' style='width: 5.3em;' class='btn #{booked_out ? 'btn-outline-secondary' : 'btn-info'} bu-book-public-event' #{booked_out ? 'disabled': ''}>#{entry[:description]}</button><div style='display: none;' class='booking-text'>#{text}</div>"
                    end
                    if printed_row
                        io.puts "</td>"
                        io.puts "</tr>"
                    end
                end
                io.puts "</tbody>"
                io.puts "</table>"
                io.puts "</div>"
            else
                io.puts "<div class='table-responsive' style='max-width: 100%; overflow-x: auto;' data-event-key='#{event[:key]}'>"
                io.puts "<div style='display: none;' class='event-title'>#{event[:title]}</div>"
                io.puts "<table class='table table-narrow narrow th-middle'>"
                colspan = event[:rows].map { |x| x[:entries].size }.max
                io.puts "<colgroup>"
                io.puts "<col style='width: 180px;'/>"
                colspan.times do
                    io.puts "<col style='width: auto;'/>"
                end
                io.puts "</colgroup>"
                io.puts "<tbody>"
                if event[:headings]
                    io.puts "<tr>"
                    io.puts "<th>#{event[:headings][0]}</th>"
                    io.puts "<th colspan='#{colspan}'>#{event[:headings][1]}</th>"
                    io.puts "</tr>"
                end
                event[:rows].each do |row|
                    io.puts "<tr>"
                    io.puts "<th>#{row[:description]}</th>"
                    row[:entries].each do |entry|
                        text = (event[:booking_text] || '').dup
                        while true
                            index = text.index('{')
                            break if index.nil?
                            length = 1
                            balance = 1
                            while index + length < text.size && balance > 0
                                c = text[index + length]
                                balance -= 1 if c == '}'
                                balance += 1 if c == '{'
                                length += 1
                            end
                            code = text[index + 1, length - 2]
                            begin
                                text[index, length] = eval(code).to_s || ''
                            rescue
                                debug "Error while evaluating for #{(@session_user || {})[:email]}:"
                                debug code
                                raise
                            end
                        end
                        booked_out = false
                        if (sign_ups[entry[:key]] || []).size >= (entry[:capacity] || 0)
                            booked_out = true
                        end
                        io.puts "<td><button data-event-key='#{event[:key]}' data-key='#{entry[:key]}' class='btn #{booked_out ? 'btn-outline-secondary' : 'btn-info'} bu-book-public-event' #{booked_out ? 'disabled': ''}>#{entry[:description]}</button><div style='display: none;' class='booking-text'>#{text}</div></td>"
                    end
                    io.puts "</tr>"
                end
                io.puts "</tbody>"
                io.puts "</table>"
                io.puts "</div>"
            end
        end
        io.string
    end
end

#print_salzh_panel ⇒ Object 



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# File 'src/ruby/include/salzh.rb', line 400

def print_salzh_panel
    require_user!
    unless teacher_logged_in?
        salzh_status = Main.get_salzh_status_for_emails(@session_user[:email])[@session_user[:email]]
        return '' if salzh_status[:status].nil?
        StringIO.open do |io|
            end_date = salzh_status[:status_end_date]
            if salzh_status[:status] == :salzh
                p = Date.parse(end_date) + 1
                while [0, 6].include?(p.wday) || @@holiday_dates.include?(p.strftime("%Y-%m-%d"))
                    p += 1
                end
                io.puts "<div class='col-lg-12 col-md-4 col-sm-6'>"
                io.puts "<div class='hint'>"
                io.puts "<p><strong>Unterricht im saLzH</strong></p>"
                io.puts "<p>Du bist <strong>bis zum #{Date.parse(end_date).strftime('%d.%m.')}</strong> für das schulisch angeleite Lernen zu Hause (saLzH) eingetragen. Bitte schau regelmäßig in deinem Stunden&shy;plan nach, ob du Aufgaben in der Nextcloud oder im Lernraum bekommst oder ob Stunden per Jitsi durch&shy;geführt werden. <strong>Ab dem #{p.strftime('%d.%m.')}</strong> erwarten wir dich wieder in der Schule.</p>"
                io.puts "</div>"
                io.puts "</div>"
            elsif salzh_status[:status] == :contact_person
                io.puts "<div class='col-lg-12 col-md-4 col-sm-6'>"
                io.puts "<div class='hint'>"
                io.puts "<p><strong>Kontaktperson</strong></p>"
                io.puts "<p>Du bist <strong>bis zum #{Date.parse(end_date).strftime('%d.%m.')}</strong> als Kontakt&shy;person markiert. Das heißt, dass du weiterhin in die Schule kommen darfst, aber einige Regeln beachten musst. Falls du freiwillig zu Hause bleiben möchtest, müssen deine Eltern dem Sekretariat <a href='mailto:sekretariat@gymnasiumsteglitz.de'>per E-Mail Bescheid geben</a>. Die folgenden Regeln gelten für dich:</p>"
                io.puts "<hr />"
                io.puts "<ul style='padding-left: 1.5em;'>"
                io.puts "<li>tägliche Testung vor Beginn der Schultages (ein Test vom Vortag, z. B. aus einem Schnell&shy;test&shy;zentrum, kann nicht akzeptiert werden)</li>"
                if ['11', '12'].include?(@session_user[:klasse])
                    io.puts "<li>du bekommst von deiner Tutorin / deinem Tutor am Freitag für jeden Tag des Wochenendes, an du noch Kontakt&shy;person bist, einen Schnelltest mit nach Hause</li>"
                else
                    io.puts "<li>du bekommst von deiner Klassen&shy;leitung (#{@@klassenleiter[@session_user[:klasse]].map { |shorthand| @@user_info[@@shorthands[shorthand]][:display_last_name] }.join(' oder ')}) am Freitag für jeden Tag des Wochenendes, an du noch Kontakt&shy;person bist, einen Schnelltest mit nach Hause</li>"
                end
                io.puts "<li>falls du Symptome (Husten, Fieber, Kopfschmerzen, …) zeigst, darfst du das Schulhaus nicht mehr betreten</li>"
                io.puts "<li>du darfst nicht mehr am gemeinsamen Essen in der Mensa teilnehmen</li>"
                io.puts "<li>während des Sport&shy;unter&shy;richts (Umkleide, Sport in der Halle) musst du durch&shy;gehend eine Maske tragen – ist dies aufgrund der körperlichen Betätigung nicht möglich, nimmst du nicht am Sportunterricht teil</li>"
                io.puts "</ul>"
                io.puts "</div>"
                io.puts "</div>"
            elsif salzh_status[:status] == :hotspot_klasse
                io.puts "<div class='col-lg-12 col-md-4 col-sm-6'>"
                io.puts "<div class='hint'>"
                io.puts "<p><strong>Klasse mit erhöhtem Infektionsaufkommen</strong></p>"
                io.puts "<p>Da in deiner Klasse momentan ein erhöhtes Infektionsgeschehen herrscht, wirst du <strong>bis zum #{Date.parse(end_date).strftime('%d.%m.')}</strong> täglich getestet.</p>"
                io.puts "</div>"
                io.puts "</div>"
            end
            io.string
        end
    else
        entries = get_current_salzh_status_for_logged_in_teacher()
        return '' if entries.empty?
        hide_explanations = neo4j_query_expect_one(<<~END_OF_QUERY, {:email => @session_user[:email]})['hide']
            MATCH (u:User {email: $email})
            RETURN COALESCE(u.hide_salzh_panel_explanation, false) AS hide;
        END_OF_QUERY
        StringIO.open do |io|
            io.puts "<div class='col-lg-12 col-md-4 col-sm-6'>"
            io.puts "<div class='hint'>"
            # io.puts "<p><strong><div style='display: inline-block; padding: 4px; margin: -4px; border-radius: 4px' class='bg-warning'>SuS im saLzH</div></strong></p>"
            contact_person_count = 0
            salzh_count = 0
            all_klassen = {}
            entry_for_email = {}
            email_for_klasse_and_status = {}
            entries.each do |x| 
                entry_for_email[x[:email]] = x
                if x[:status] == :contact_person
                    contact_person_count += 1
                elsif x[:status] == :salzh
                    salzh_count += 1
                end
                all_klassen[x[:klasse]] ||= []
                all_klassen[x[:klasse]] << x[:email]
                email_for_klasse_and_status[x[:klasse]] ||= {}
                email_for_klasse_and_status[x[:klasse]][x[:status]] ||= []
                email_for_klasse_and_status[x[:klasse]][x[:status]] << x[:email]
            end

            spans = []
            if contact_person_count > 0
                spans << "#{contact_person_count}&nbsp;SuS, die Kontaktpersonen sind"
            end
            if salzh_count > 0
                spans << "#{salzh_count}&nbsp;SuS im saLzH"
            end
            io.puts "<p>"
            io.puts "Sie haben momentan #{spans.map { |x| '<strong>' + x + '</strong>'}.join(' und ')}."
            io.puts "</p>"
            io.puts "<div style='margin: 0 -10px 0 -10px; overflow-x: clip;'><table class='table table-sm narrow' style='width: 100%;'>"
            io.puts "<tr><th>Klasse</th><th>Status</th></tr>"
            KLASSEN_ORDER.each do |klasse|
                next unless all_klassen.include?(klasse)
                first_row = true
                all_klassen[klasse].each do |email|
                    next unless [:salzh, :contact_person].include?(entry_for_email[email][:status])
                    if first_row
                        io.puts "<tbody>"
                        io.puts "<tr class='klasse-click-row' data-klasse='#{klasse}'><td>Klasse #{tr_klasse(klasse)}</td>"
                        io.puts "<td>"
                        [:contact_person, :salzh].each do |status|
                            if (email_for_klasse_and_status[klasse][status] || []).size > 0
                                io.puts "<span class='salzh-badge salzh-badge-big bg-#{status == :contact_person ? 'warning': 'danger'}'><span>#{(email_for_klasse_and_status[klasse][status] || []).size}</span></span>"
                            end
                        end
                        io.puts "</td></tr>"
                        io.puts "</tbody>"
                        io.puts "<tbody style='display: none;'>"
                    end
                    first_row = false
                    badge = "<span style='position: relative; top: -1px;' class='salzh-badge salzh-badge-big bg-#{SALZH_MODE_COLORS[entry_for_email[email][:status]]}'><i class='fa #{SALZH_MODE_ICONS[entry_for_email[email][:status]]}'></i></span>"
                    io.puts "<tr><td colspan='2'>#{badge}#{@@user_info[email][:display_name]}</td></tr>"
                end
                unless first_row
                    io.puts "</tbody>"
                end
            end
            io.puts "</table></div>"
            io.puts "<hr />"
            io.puts "<p style='cursor: pointer;' onclick=\"$('#salzh_explanation').slideDown();\">"
            io.puts "<strong>Was bedeutet das?</strong>"
            io.puts "</p>"
            io.puts "<div id='salzh_explanation' style='display: #{hide_explanations ? 'none': 'block'};'>"
            if salzh_count > 0
                io.puts "<hr />"
                io.puts "<p>"
                io.puts "<strong><span class='bg-danger' style='padding: 0.2em 0.5em; font-weight: bold; border-radius: 0.25em; color: #fff;'>saLzH:</span></strong> Es handelt sich um SuS, die aus unter&shy;schied&shy;lichen Gründen im saLzH sind (z. B. positiv getestet / als Kontaktperson nach Rückmeldung der Eltern bestätigt freiwillig im saLzH / Aussetzung der Präsenz&shy;pflicht). Bitte ermöglichen Sie diesen SuS eine Teilnahme am Unterricht."
                io.puts "</p>"
            end
            if contact_person_count > 0
                io.puts "<hr />"
                io.puts "<p>"
                io.puts "<strong><span class='bg-warning' style='padding: 0.2em 0.5em; font-weight: bold; border-radius: 0.25em;'>Kontaktpersonen:</span></strong> Diese SuS wurden als Kontaktperson identifiziert, besuchen aber trotzdem weiterhin die Schule. Für sie gilt:"
                io.puts "</p>"
                io.puts "<ul style='padding-left: 1.5em;'>"
                io.puts "<li>tägliche Testung vor Beginn der Schultages (ein Test vom Vortag, z. B. aus einem Schnelltestzentrum, kann bei diesen SuS nicht akzeptiert werden)</li>"
                io.puts "<li>durch die Klassenleitung wird am Freitag für jeden Tag des Wochenendes, der in diesen Status fällt, ein Schnelltest mitgegeben</li>"
                io.puts "<li>zeigen diese Kinder Symptome (Husten, Fieber, Kopfschmerzen, …), dürfen sie das Schulhaus nicht mehr betreten</li>"
                io.puts "<li>am gemeinsamen Essen in der Mensa darf nicht mehr teilgenommen werden</li>"
                io.puts "<li>während des Sportunterrichts (Umkleide, Sport in der Halle) muss durchgehend eine Maske getragen werden – ist dies aufgrund der körperlichen Betätigung nicht möglich, nehmen diese Kinder nicht am Sportunterricht teil</li>"
                io.puts "</ul>"
            end
            io.puts "<button class='btn btn-xs btn-outline-secondary' id='bu_minimize_salzh_explanation'>Diese Information minimieren</button>"
            io.puts "</div>"
            io.puts "</div>"
            io.puts "</div>"
            io.string
        end
    end
end

#print_salzh_protocol_table(week_delta = 0) ⇒ Object 



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# File 'src/ruby/include/salzh.rb', line 910

def print_salzh_protocol_table(week_delta = 0)
    holiday_dates = Set.new()
    @@ferien_feiertage.each do |entry|
        temp0 = Date.parse(entry[:from])
        temp1 = Date.parse(entry[:to])
        while temp0 <= temp1
            holiday_dates << temp0.strftime('%Y-%m-%d')
            temp0 += 1
        end
    end
    StringIO.open do |io|
        data = {}
        Dir['/internal/salzh_protocol/*.txt'].sort.each do |path|
            datum = File.basename(path).sub('.txt', '')
            d = DateTime.parse(datum)

            # skip weekends
            next if [0, 6].include?(d.wday)

            # skip holidays
            next if holiday_dates.include?(datum)

            emails = File.read(path).split("\n").map { |x| x.strip }.reject { |x| x.empty? || x[0] == '#' }
            emails.each do |email|
                data[email] ||= {}
                data[email][datum] = true
            end
        end
        now = DateTime.now
        now -= week_delta * 7
        cw = now.strftime('%-V').to_i
        d0 = now
        while d0.wday != 1
            d0 -= 1
        end
        d1 = d0 + 4
        io.puts "<table class='table table-striped table-sm narrow'>"
        io.puts "<thead>"
        io.puts "<tr>"
        io.puts "<th rowspan='2'>Klasse</th>"
        io.puts "<th rowspan='2'>Name</th>"
        io.puts "<th colspan='5'>KW #{cw} (#{d0.strftime('%d.%m.')} &ndash; #{d1.strftime('%d.%m.')})</th>"
        io.puts "<th rowspan='2'>Gesamt</th>"
        io.puts "</tr>"
        io.puts "<tr>"
        io.puts "<th>Mo</th>"
        io.puts "<th>Di</th>"
        io.puts "<th>Mi</th>"
        io.puts "<th>Do</th>"
        io.puts "<th>Fr</th>"
        io.puts "</tr>"
        io.puts "</thead>"
        io.puts "<tbody>"
        KLASSEN_ORDER.each.with_index do |klasse, index|
            iterate_directory(klasse) do |email, i|
                next unless data[email]
                io.puts "<tr>"
                io.puts "<td>#{klasse}</td>"
                io.puts "<td>#{@@user_info[email][:display_name]}</td>"
                (0...5).each do |i|
                    flag = data[email][(d0 + i).strftime('%Y-%m-%d')]
                    io.print "<td>"
                    if flag 
                        io.puts "<i class='fa fa-home'></i>"
                    else
                        io.puts "&ndash;"
                    end
                    io.puts "</td>"
                end
                io.puts "<td>#{data[email].size}</td>"
                io.puts "</tr>"
            end
        end
        io.puts "</tbody>"
        io.puts "</table>"
        io.string
    end
end

#print_salzh_protocol_table_overview(week_delta = 0) ⇒ Object 



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# File 'src/ruby/include/salzh.rb', line 853

def print_salzh_protocol_table_overview(week_delta = 0)
    holiday_dates = Set.new()
    @@ferien_feiertage.each do |entry|
        temp0 = Date.parse(entry[:from])
        temp1 = Date.parse(entry[:to])
        while temp0 <= temp1
            holiday_dates << temp0.strftime('%Y-%m-%d')
            temp0 += 1
        end
    end
    StringIO.open do |io|
        data = {}
        week = Set.new()
        now = DateTime.now
        now -= week_delta * 7
        cw = now.strftime('%-V').to_i
        d0 = now
        while d0.wday != 1
            d0 -= 1
        end
        d1 = d0 + 4
        Dir['/internal/salzh_protocol/*.txt'].sort.each do |path|
            datum = File.basename(path).sub('.txt', '')
            d = DateTime.parse(datum)

            # skip weekends
            next if [0, 6].include?(d.wday)

            # skip holidays
            next if holiday_dates.include?(datum)

            # skip if not current week
            next if datum < d0.strftime('%Y-%m-%d') || datum > d1.strftime('%Y-%m-%d')

            emails = File.read(path).split("\n").map { |x| x.strip }.reject { |x| x.empty? || x[0] == '#' }
            emails.each do |email|
                data[datum] ||= Set.new()
                data[datum] << email
                week << email
            end
        end
        io.puts "<table class='table table-striped table-sm narrow'>"
        io.puts "<tbody>"
        io.puts "<tr>"
        io.puts "<th>KW #{cw}</th><th>#{d0.strftime('%d.%m.')} &ndash; #{d1.strftime('%d.%m.')}</th><td>#{week.size} SuS</td>"
        io.puts "</tr>"
        (0...5).each do |i|
            io.puts "<tr>"
            io.puts "<th>#{%w(Mo Di Mi Do Fr)[i]}</th><th>#{(d0 + i).strftime('%d.%m.')}</th><td>#{(data[(d0 + i).strftime('%Y-%m-%d')] || Set.new()).size} SuS</td>"
            io.puts "</tr>"
        end
        io.puts "</tbody>"
        io.puts "</table>"
        io.string
    end
end

#print_self_test_panel ⇒ Object 



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# File 'src/ruby/include/salzh.rb', line 1065

def print_self_test_panel()
    require_user!
    return '' unless teacher_logged_in?
    return '' if teacher_tablet_logged_in?
    return '' if EXCLUDE_FROM_SELF_TEST_REPORT.include?(@session_user[:shorthand])
    today = Date.today.strftime('%Y-%m-%d')
    StringIO.open do |io|
        io.puts "<div class='col-lg-12 col-md-4 col-sm-6'>"
        io.puts "<div class='hint'>"
        days = self_tests_this_week()
        label = 'noch nicht'
        days_label = ''
        if days.size > 0
            label = "bereits #{days.size}×"
            days_label = " (am #{join_with_sep(days.map{ |x| x[:label] }, ', ', ' und ')})"
        end
        io.puts "Sie haben sich in dieser Woche <strong>#{label}</strong> getestet#{days_label}."
        io.puts "<hr />"
        io.puts "<button #{days.map { |x| x[:datum] }.include?(today) ? 'disabled' : ''} class='bu-add-self-test btn btn-success btn-sm float-right'><i class='fa fa-pencil'></i>&nbsp;&nbsp;Testung protokollieren…</button><div style='clear: both;'></div>"
        io.puts "</div>"
        io.puts "</div>"
        io.string
    end
end

#print_semi_public_links ⇒ Object 



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# File 'src/ruby/main.rb', line 2209

def print_semi_public_links()
    require_user!
    # return '' unless teacher_logged_in?
    return '' if teacher_tablet_logged_in?
    StringIO.open do |io|
        io.puts "<h2 style='margin-bottom: 30px; margin-top: 30px;'>Schulinterne Links</h2>"
        io.puts "<div class='table-responsive' style='max-width: 100%; overflow-x: auto;'>"
        io.puts "<table class='table table-condensed table-striped narrow' style='width: unset; min-width: 100%;'>"
        io.puts "<tr><th>Website</th><th>Name</th><th>Passwort</th></tr>"
        SEMI_PUBLIC_LINKS.each do |link|
            next unless link[:condition].call(self)
            io.puts "<tr>"
            io.puts "<td><a href='#{link[:url]}' target='_blank'>#{link[:title]}</a></td>"
            io.puts "<td>"
            print_email_field(io, link[:user])
            io.puts "</td>"
            io.puts "<td>"
            print_password_field(io, link[:password])
            io.puts "</td>"
            io.puts "</tr>"
        end
        io.puts "</table>"
        io.puts "</div>"
        io.puts "<hr />"
        io.string
    end
end

#print_sessions ⇒ Object 



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# File 'src/ruby/include/login.rb', line 519

def print_sessions()
    require_user!
    StringIO.open do |io|
        io.puts "<table class='table table-condensed table-striped table-narrow'>"
        io.puts "<thead>"
        io.puts "<tr>"
        io.puts "<th>Gültig bis</th>"
        io.puts "<th>Zuletzt verwendet</th>"
        io.puts "<th>Gerät</th>"
        io.puts "<th>Art</th>"
        io.puts "<th>Abmelden</th>"
        io.puts "</tr>"
        io.puts "</thead>"
        io.puts "<tbody>"
        sessions = get_current_user_sessions()

        sessions.each do |s|
            io.puts "<tr>"
            d = s[:expires] ? Time.parse(s[:expires]).strftime('%d.%m.%Y') : '&ndash;'
            io.puts "<td>#{d}</td>"
            d = s[:last_access] ? Time.parse(s[:last_access]).strftime('%d.%m.%Y') : '&ndash;'
            io.puts "<td>#{d}</td>"
            io.puts "<td style='text-overflow: ellipsis;'>#{(s[:sid] == @used_session[:sid]) ? '<i class=\'text-success fa fa-check\'></i>&nbsp;&nbsp;' : ''}#{s[:user_agent] || 'unbekanntes Gerät'}#{(s[:sid] == @used_session[:sid]) ? '<div style=\'font-size: 85%; margin-top: -5px;\'>(dieses Gerät)</div>' : ''}</td>"
            io.puts "<td>#{LOGIN_METHODS[s[:method].to_sym] || '&ndash;'}</td>"
            io.puts "<td><button class='btn btn-danger btn-xs btn-purge-session' data-purge-session='#{s[:scrambled_sid]}'><i class='fa fa-sign-out'></i>&nbsp;&nbsp;Gerät abmelden</button></td>"
            io.puts "</tr>"
        end
        if sessions.size > 1
            io.puts "<tr>"
            io.puts "<td colspan='5'><button class='float-right btn btn-danger btn-xs btn-purge-session' data-purge-session='_all'><i class='fa fa-sign-out'></i>&nbsp;&nbsp;Alle Geräte abmelden</button></td>"            
            io.puts "</tr>"
        end
        io.puts "</tbody>"
        io.puts "</table>"
        io.string
    end
end

#print_stats ⇒ Object 



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# File 'src/ruby/include/stats.rb', line 49

def print_stats()
    require_admin!
     = ()
    StringIO.open do |io|
        io.puts "<table class='table table-narrow'>"
        io.puts "<thead>"
        io.puts "<tr>"
        io.puts "<th>Gruppe</th>"
        io.puts "<th>jemals</th>"
        io.puts "<th>letzte 4 Wochen</th>"
        io.puts "<th>letzte Woche</th>"
        io.puts "<th>heute</th>"
        io.puts "</tr>"
        io.puts "</thead>"
        io.puts "<tbody>"
        ([:sus, :lehrer] + @@klassen_order).each do |key|
            label = nil
            if key == :sus
                label = 'Schülerinnen und Schüler'
            elsif key == :lehrer
                label = 'Lehrerinnen und Lehrer'
            else
                label = "Klasse #{tr_klasse(key)}" 
            end
            io.puts "<tr>"
            io.puts "<td>#{label}</td>"
            LOGIN_STATS_D.reverse.each do |d|
                io.puts "<td>"
                data = [key]
                percent = data[:total] == 0 ? 0 : ((data[:count][d] || 0) * 100 / data[:total]).to_i
                bgcol = get_gradient(['#cc0000', '#f4951b', '#ffe617', '#80bc42'], percent / 100.0)
                io.puts "<span style='background-color: #{bgcol}; padding: 4px 8px; margin: 0; border-radius: 3px;'>#{percent}%</span>"
                io.puts "</td>"
            end
            io.puts "</tr>"
        end
        io.puts "</tbody>"
        io.puts "</table>"
        io.string
    end
end

#print_stream_restriction_table(klasse) ⇒ Object 



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# File 'src/ruby/include/lesson.rb', line 491

def print_stream_restriction_table(klasse)
    lesson_keys = (@@lessons_for_shorthand[@session_user[:shorthand]] || []).select do |lesson_key|
        lesson_info = @@lessons[:lesson_keys][lesson_key]
        (lesson_info[:klassen] || []).include?(klasse)
    end
    return '' if lesson_keys.empty?
    StringIO.open do |io|
        io.puts "<hr />"
        io.puts "<div class='alert alert-warning'>"
        io.puts "Falls Sie einschränken möchten, welche Kinder in Ihrem Unterricht am Streaming teilnehmen dürfen, können Sie dies hier tun. Standardmäßig ist der Stream, falls Sie ihn aktivieren, für alle Kinder aktiviert. Sie können zwei Einschränkungen vornehmen: a) nur für Kinder, die planmäßig gerade nicht in der Schule sind + Kinder, die dauerhaft zu Hause sind (»nicht für Wechselgruppe in Präsenz«) oder b) nur für Kinder, die dauerhaft zu Hause, also oben als »zu Hause« markiert sind (»nur für Dauer-saLzH«)."
        io.puts "</div>"
        io.puts "<div class='table-responsive'>"
        io.puts "<table class='table stream-restriction-table'>"
        io.puts "<tr>"
        io.puts "<th style='text-align: left;'>Fach</th>"
        io.puts "<th>Montag</th>"
        io.puts "<th>Dienstag</th>"
        io.puts "<th>Mittwoch</th>"
        io.puts "<th>Donnerstag</th>"
        io.puts "<th>Freitag</th>"
        io.puts "</tr>"
        lesson_keys.each do |lesson_key|
            io.puts "<tr>"
            restrictions = self.class.get_stream_restriction_for_lesson_key(lesson_key)
            io.puts "<td style='text-align: left;'>"
            lesson_info = @@lessons[:lesson_keys][lesson_key]
            io.puts "#{lesson_info[:pretty_folder_name]}"
            io.puts "</td>"
            restrictions.each.with_index do |r, i|
                btn_style = 'btn-primary'
                btn_label = 'für alle'
                if r == 1
                    btn_style = 'btn-info'
                    btn_label = 'nur für Dauer-saLzH'
                elsif r == 2
                    btn_style = 'btn-warning'
                    btn_label = 'nicht für Wechselgruppe in Präsenz'
                end
                io.puts "<td>"
                io.puts "<button data-lesson-key='#{lesson_key}' data-day='#{i}' class='bu-toggle-stream-restriction btn #{btn_style}'>#{btn_label}</button>"
                io.puts "</td>"
            end
            io.puts "</tr>"
        end
        io.puts "</table>"
        io.puts "</div>"
        io.string
    end
end

#print_summoned_books_panel ⇒ Object 



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# File 'src/ruby/include/user.rb', line 543

def print_summoned_books_panel()
    require_user!
    email = @session_user[:email]
    self.class.refresh_bib_data()
    result = ''
    if @@bib_summoned_books[email]
        n_to_s = {1 => 'Eines der', 2 => 'Zwei', 3 => 'Drei', 4 => 'Vier', 5 => 'Fünf'}
        result += StringIO.open do |io|
            io.puts "<div class='col-lg-12 col-md-4 col-sm-6'>"
            io.puts "<div class='hint'>"
            io.puts "<div><span style='font-size: 200%; float: left; margin-right: 8px;'>📚</span>#{n_to_s[@@bib_summoned_books[email].size] || 'Mehrere'} Bücher, die du ausgeliehen hast, #{@@bib_summoned_books[email].size == 1 ? 'wird' : 'werden'} dringend in der Bibliothek benötigt. Bitte bring #{@@bib_summoned_books[email].size == 1 ? 'es' : 'sie'} zurück und lege #{@@bib_summoned_books[email].size == 1 ? 'es' : 'sie'} ins <a target='_blank' href='https://rundgang.gymnasiumsteglitz.de/#g114'>Rückgaberegal</a> vor der Bibliothek.</div>"
            io.puts "<hr />"
            io.puts "<a href='/bibliothek' style='white-space: nowrap;' class='float-right btn btn-sm btn-success'>Zu deinen Büchern&nbsp;<i class='fa fa-angle-double-right'></i></a>"
            io.puts "<div style='clear: both;'></div>"
            io.puts "</div>"
            io.puts "</div>"
            io.string
        end
    end
    # if @@bib_unconfirmed_books[email] && (!teacher_logged_in?)
    #     n_to_s = {1 => 'Eines', 2 => 'Zwei', 3 => 'Drei', 4 => 'Vier', 5 => 'Fünf'}
    #     result += StringIO.open do |io|
    #         io.puts "<div class='col-lg-12 col-md-4 col-sm-6'>"
    #         io.puts "<div class='hint'>"
    #         io.puts "<div><span style='font-size: 200%; float: left; margin-right: 8px;'>🙁</span>#{n_to_s[@@bib_unconfirmed_books[email].size] || 'Mehrere'} deiner ent&shy;lieh&shy;enen Bücher #{@@bib_unconfirmed_books[email].size == 1 ? 'wurde' : 'wurden'} von dir noch nicht bestätigt. <strong>Bitte scanne #{@@bib_unconfirmed_books[email].size == 1 ? 'das Buch' : 'die Bücher'} jetzt ein.</strong></div>"
    #         io.puts "<hr />"
    #         io.puts "<a href='/bib_confirm' style='white-space: nowrap;' class='float-right btn btn-sm btn-success'><i class='fa fa-barcode'></i>&nbsp;&nbsp;Bücher bestätigen</a>"
    #         io.puts "<div style='clear: both;'></div>"
    #         io.puts "</div>"
    #         io.puts "</div>"
    #         io.string
    #     end
    # end
    result
end

#print_tablet_login ⇒ Object 



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# File 'src/ruby/include/techpost.rb', line 509

def ()
    require_user_who_can_manage_tablets!
    StringIO.open do |io|
        io.puts "<p>Mit einem Klick auf diesen Button kannst du dieses Gerät dauerhaft als Lehrer-Tablet anmelden.</p>"
        io.puts "<button class='btn btn-primary bu_login_teacher_tablet'><i class='fa fa-sign-in'></i>&nbsp;&nbsp;Lehrer-Tablet-Modus aktivieren</button>"
        io.puts "<hr />"
        io.puts "<p>Bitte wähle ein order mehrere Kürzel, um dieses Gerät dauerhaft als Kurs-Tablet anzumelden.</p>"
        @@shorthands.keys.sort.each do |shorthand|
            io.puts "<button class='btn-teacher-for-kurs-tablet-login btn btn-xs btn-outline-secondary' data-shorthand='#{shorthand}'>#{shorthand}</button>"
        end
        io.puts "<br /><br >"
        io.puts "<button class='btn btn-primary bu_login_kurs_tablet' disabled><i class='fa fa-sign-in'></i>&nbsp;&nbsp;Kurs-Tablet-Modus aktivieren</button>"
        io.puts "<hr />"
        io.puts "<p>Bitte wähle ein Tablet, um dieses Gerät dauerhaft als dieses Tablet anzumelden.</p>"
        @@tablets.keys.each do |id|
            tablet = @@tablets[id]
            io.puts "<button class='btn-tablet-login btn btn-xs btn-outline-secondary' data-id='#{id}' style='background-color: #{tablet[:bg_color]}; color: #{tablet[:fg_color]};'>#{id}</button>"
        end
        io.puts "<hr />"
        io.puts "<div style='max-width: 100%; overflow-x: auto;'>"
        io.puts "<table class='table table-condensed table-striped narrow' style='width: unset; min-width: 100%;'>"
        io.puts "<thead>"
        io.puts "<tr>"
        io.puts "<th>Typ</th>"
        io.puts "<th>Gerät</th>"
        io.puts "<th>Abmelden</th>"
        io.puts "</tr>"
        io.puts "</thead>"
        io.puts "<tbody>"
        get_sessions_for_user("lehrer.tablet@#{SCHUL_MAIL_DOMAIN}").each do |session|
            io.puts "<tr>"
            io.puts "<td>Lehrer-Tablet</td>"
            io.puts "<td>#{session[:user_agent]}</td>"
            io.puts "<td><button class='btn btn-xs btn-danger btn-purge-session' data-email='lehrer.tablet@#{SCHUL_MAIL_DOMAIN}' data-scrambled-sid='#{session[:scrambled_sid]}'>Abmelden</button></td>"
            io.puts "</tr>"
        end
        get_sessions_for_user("kurs.tablet@#{SCHUL_MAIL_DOMAIN}").each do |session|
            io.puts "<tr>"
            io.puts "<td>Kurs-Tablet (#{(session[:shorthands] || []).sort.join(', ')})</td>"
            io.puts "<td>#{session[:user_agent]}</td>"
            io.puts "<td><button class='btn btn-xs btn-danger btn-purge-session' data-email='kurs.tablet@#{SCHUL_MAIL_DOMAIN}' data-scrambled-sid='#{session[:scrambled_sid]}'>Abmelden</button></td>"
            io.puts "</tr>"
        end
        io.puts "</tbody>"
        io.puts "</table>"
        io.puts "</div>"
        io.string
    end
end

#print_techpost_superuser ⇒ Object 



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# File 'src/ruby/include/techpost.rb', line 455

def print_techpost_superuser()
    require_user_who_can_manage_tablets!
    problems = neo4j_query(<<~END_OF_QUERY, :email => @session_user[:email]).map { |x| {:problem => x['v'], :email => x['u.email'], :femail => x['f.email']} }
        MATCH (v:TechProblem)-[:BELONGS_TO]->(u:User)
        OPTIONAL MATCH (v:TechProblem)-[:WILL_BE_FIXED_BY]->(f:User)
        RETURN v, u.email, f.email;
    END_OF_QUERY
    StringIO.open do |io|
        io.puts "<h3>User, die Zugriff auf diese Seite haben</h3>"
        io.puts "<div class='alert alert-danger'><code>"
        # for tech_admin in TECHNIKTEAM + CAN_MANAGE_TABLETS_USERS + ADMIN_USERS do
        #     display_name = @@user_info[tech_admin][:display_name]
        #     nc_login = @@user_info[tech_admin][:nc_login]
        #     io.puts "<img src='#{NEXTCLOUD_URL}/index.php/avatar/#{nc_login}/256' class='icon avatar-md'>&nbsp;#{display_name}"
        # end
        io.puts "</code><div class='text-muted'>Diese Funktion steht zurzeit, aufgrund eines technischen Fehlers, nicht zur Verfügung. Bitte nutzen Sie die Liste unten.</div><code>"
        io.puts "</code></div>"
        io.puts "<div class='alert alert-info'><code>#{(TECHNIKTEAM + CAN_MANAGE_TABLETS_USERS + ADMIN_USERS).uniq.sort}</code></div>"
        io.puts "<br><h3>User, die Probleme melden können (Alle oben genannten plus:)</h3>"
        io.puts "<div class='alert alert-warning'>"
        # io.puts "<div class='text-muted'>Klicke auf einen Nutzer, um ihm die Berechtigungen für das Technikamt zu entziehen.</div>"
        io.puts "<table class='table narrow table-striped' style='width: unset; min-width: 100%;'>"
        io.puts "<thead>"
        io.puts "<tr><td>User</td><td>Bearbeiten</td></tr>"
        io.puts "</thead><tbody>"
        for technikamt in get_technikamt do
            display_name = @@user_info[technikamt][:display_name]
             = @@user_info[technikamt][:nc_login]
            klasse = @@user_info[technikamt][:klasse]
            io.puts "<tr><td><code><img src='#{NEXTCLOUD_URL}/index.php/avatar/#{}/256' class='icon avatar-md'>&nbsp;#{display_name} (#{klasse})</code></td><td><button class='btn btn-xs btn-danger bu-edit-techpost' data-email='#{technikamt}'><i class='fa fa-trash'></i>&nbsp;&nbsp;Rechte entziehen</button>&nbsp;<button class='btn btn-xs btn-success bu-send-single-welcome-mail' data-email='#{technikamt}'><i class='fa fa-envelope'></i>&nbsp;&nbsp;Willkommens-E-Mail versenden</button></td></tr>"
        end
        io.puts "</table></tbody>"
        # io.puts "</code><div class='text-muted'>Diese Funktion steht zurzeit, aufgrund eines technischen Fehlers, nicht zur Verfügung. Bitte nutzen Sie die Liste unten.</div><code>"
        io.puts "</code></div>"
        io.puts "<div class='alert alert-warning'><code>#{get_technikamt}</code></div>"
        unless problems == []
            io.puts "<br><h3>Aktuelle Probleme im json-Format</h3>"
            for problem in problems do
                io.puts "<div class='alert alert-success'><code>#{problem.to_json}</code></div>"
            end
        end
        io.puts "<br><h3>Super Funktionen</h3>"
        io.puts "<div class='alert alert-info'>"
        io.puts "<button class='bu-clear-all btn btn-danger'><i class='fa fa-trash'></i>&nbsp;&nbsp;Alle Probleme löschen</button>"
        io.puts "<button class='bu-send-welcome-mail btn btn-warning'><i class='fa fa-envelope'></i>&nbsp;&nbsp;Willkommens-E-Mail versenden</button>"
        io.puts "</div>"
        io.puts "<div class='alert alert-info'>"
        io.puts "<div class='form-group'><input id='ti_recipients' class='form-control' placeholder='User suchen…' /><div class='recipient-input-dropdown' style='display: none;'></div></input></div>"
        io.puts "<div class='form-group row'><label for='ti_email' class='col-sm-1 col-form-label'>Name:</label><div class='col-sm-3'><input type='text' readonly class='form-control' id='ti_email' placeholder=''></div><div id='publish_message_btn_container'><button disabled id='bu_send_message' class='btn btn-outline-secondary'><i class='fa fa-plus'></i>&nbsp;&nbsp;<span>Hinzufügen</span></button>&nbsp;&nbsp;<button disabled id='bu_delete_message' class='btn btn-outline-secondary'><i class='fa fa-times'></i>&nbsp;&nbsp;<span>Entfernen</span></button></div></div>"
        io.puts "Hinweis: Die Änderungen werden erst nach dem Neuladen der Seite sichtbar.</div>"
        io.string
    end
end

#print_test_klassen_chooser(active = nil) ⇒ Object 



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# File 'src/ruby/main.rb', line 2193

def print_test_klassen_chooser(active = nil)
    StringIO.open do |io|
        io.puts "<div style='margin-bottom: 15px;'>"
        klassen_for_session_user.each do |klasse|
            next if ['11', '12'].include?(klasse)
            io.puts "<a data-klasse='#{klasse}' class='btn btn-sm ttc #{klasse == active ? 'active': ''}'>#{tr_klasse(klasse)}</a>"
        end
        if user_who_can_manage_news_logged_in?
            io.puts "<hr />"
            io.puts "<a href='/manage_test_calendar' style='width: 9em;' class='btn btn-sm ttc'>Kalender verwalten</a>"
        end
        io.puts "</div>"
        io.string
    end
end

#print_timetable_chooser ⇒ Object 



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# File 'src/ruby/main.rb', line 2056

def print_timetable_chooser()
    # if can_see_all_timetables_logged_in?
    #     StringIO.open do |io|
    #         io.puts "<div style='margin-bottom: 15px;'>"
    #         unless teacher_tablet_logged_in?
    #             @@klassen_order.each do |klasse|
    #                 id = @@klassen_id[klasse]
    #                 io.puts "<a data-klasse='#{klasse}' data-id='#{id}' onclick=\"window.location.href = '/timetable/#{id}' + window.location.hash;\" class='btn btn-sm ttc'>#{tr_klasse(klasse)}</a>"
    #             end
    #             io.puts '<hr />'
    #         end
    #         @@lehrer_order.each do |email|
    #             id = @@user_info[email][:id]
    #             next unless @@user_info[email][:can_log_in]
    #             io.puts "<a data-id='#{id}' onclick=\"window.location.href = '/timetable/#{id}' + window.location.hash;\" class='btn btn-sm ttc'>#{@@user_info[email][:shorthand]}</a>"
    #         end
    #         io.puts '<hr />'
    #         ROOM_ORDER.each do |room|
    #             id = room
    #             # next unless @@user_info[email][:can_log_in]
    #             io.puts "<a data-id='#{id}' onclick=\"window.location.href = '/timetable/#{id}' + window.location.hash;\" class='btn btn-sm ttc'>#{room}</a>"
    #         end
    #         io.puts "</div>"
    #         io.string
    #     end
    if kurs_tablet_logged_in?
        StringIO.open do |io|
            io.puts "<div style='margin-bottom: 15px;'>"
            @@lehrer_order.each do |email|
                next unless @session_user[:shorthands].include?(@@user_info[email][:shorthand])
                id = @@user_info[email][:id]
                next unless @@user_info[email][:can_log_in]
                io.puts "<a data-id='#{id}' onclick=\"window.location.href = '/timetable/#{id}' + window.location.hash;\" class='btn btn-sm ttc'>#{@@user_info[email][:shorthand]}</a>"
            end
            io.puts "</div>"
            io.string
        end
    elsif klassenraum_logged_in?
        StringIO.open do |io|
            io.puts "<div style='margin-bottom: 15px;'>"
            @@klassen_order.each do |klasse|
                id = @@klassen_id[klasse]
                io.puts "<a data-klasse='#{klasse}' data-id='#{id}' onclick=\"window.location.href = '/timetable/#{id}' + window.location.hash;\" class='btn btn-sm ttc'>#{tr_klasse(klasse)}</a>"
            end
            io.puts "</div>"
            io.string
        end
    elsif teacher_logged_in?
        StringIO.open do |io|
            io.puts "<div style='margin-bottom: 15px;'>"
            hidden_something = false
            temp = StringIO.open do |tio|
                @@lehrer_order.each do |email|
                    next if teacher_tablet_logged_in? && @@user_info[email][:shorthand][0] == '_'
                    id = @@user_info[email][:id]
                    next unless @@user_info[email][:can_log_in]
                    next unless can_see_all_timetables_logged_in? || email == @session_user[:email]
                    hide = (email != @session_user[:email])
                    hide = false if teacher_tablet_logged_in?
                    hidden_something = true if hide
                    style = hide ? 'display: none;' : ''
                    tio.puts "<a data-id='#{id}' onclick=\"load_timetable('#{id}'); window.selected_shorthand = '#{@@user_info[email][:shorthand]}'; \" class='btn btn-sm ttc ttc-teacher' style='#{style}'>#{@@user_info[email][:shorthand]}</a>"
                end
                tio.string
            end
            if hidden_something
                io.puts "<button class='btn btn-xs ttc bu-show-alle-teacher pull-right' style='margin-left: 0.5em; width: unset; padding: 0.25rem 0.5rem; display: inline-block;' onclick=\"$('.ttc-teacher').show(); $('.bu-show-alle-teacher').hide();\">Alle Lehrkräfte</button>"
            end
            io.puts temp
            unless teacher_tablet_logged_in?
                io.puts '<hr />'

                hidden_something = false
                all_hidden = @@klassen_order.all? do |klasse|
                    !((@@klassen_for_shorthand[@session_user[:shorthand]] || Set.new()).include?(klasse))
                end
                temp = StringIO.open do |tio|
                    @@klassen_order.each do |klasse|
                        hide = !((@@klassen_for_shorthand[@session_user[:shorthand]] || Set.new()).include?(klasse))
                        hide = false if all_hidden
                        hidden_something = true if hide
                        style = hide ? 'display: none;' : ''
                        id = @@klassen_id[klasse]
                        tio.puts "<a data-klasse='#{klasse}' data-id='#{id}' onclick=\"load_timetable('#{id}');\" class='btn btn-sm ttc ttc-klasse' style='#{style}'>#{tr_klasse(klasse)}</a>"
                    end
                    tio.string
                end
                if hidden_something
                    io.puts "<button class='btn btn-xs ttc bu-show-alle-klassen pull-right' style='margin-left: 0.5em; width: unset; padding: 0.25rem 0.5rem; display: inline-block;' onclick=\"$('.ttc-klasse').show(); $('.bu-show-alle-klassen').hide();\">Alle Klassen</button>"
                end
                io.puts temp

                io.puts '<hr />'

                hidden_something = false
                all_hidden = ROOM_ORDER.all? do |room|
                    !((@@rooms_for_shorthand[@session_user[:shorthand]] || Set.new()).include?(room))
                end
                temp = StringIO.open do |tio|
                    ROOM_ORDER.each do |room|
                        hide = !((@@rooms_for_shorthand[@session_user[:shorthand]] || Set.new()).include?(room))
                        hide = false if all_hidden
                        hidden_something = true if hide
                        style = hide ? 'display: none;' : ''
                        id = @@room_ids[room]
                        tio.puts "<a data-id='#{id}' onclick=\"load_timetable('#{id}');\" class='btn btn-sm ttc ttc-room' style='#{style}'>#{room}</a>"
                    end
                    tio.string
                end
                if hidden_something
                    io.puts "<button class='btn btn-xs ttc bu-show-alle-rooms pull-right' style='margin-left: 0.5em; width: unset; padding: 0.25rem 0.5rem; display: inline-block;' onclick=\"$('.ttc-room').show(); $('.bu-show-alle-rooms').hide();\">Alle Räume</button>"
                end
                io.puts temp
            end


            io.puts "</div>"
            io.string
        end
    elsif technikteam_logged_in?
        StringIO.open do |io|
            io.puts "<div style='margin-bottom: 15px;'>"
            temp = StringIO.open do |tio|
                ROOM_ORDER.each do |room|
                    id = @@room_ids[room]
                    tio.puts "<a data-id='#{id}' onclick=\"load_timetable('#{id}');\" class='btn btn-sm ttc ttc-room'>#{room}</a>"
                end
                tio.string
            end
            io.puts temp
            
            io.puts "</div>"
            io.string
        end
    end
end

#print_tresor_countdown_panel ⇒ Object 



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# File 'src/ruby/include/user.rb', line 608

def print_tresor_countdown_panel()
    return '' unless teacher_logged_in?
    deadline = '2023-06-26T09:00:00'
    if Time.now.strftime('%Y-%m-%dT%H:%M:%S') <= deadline
        return StringIO.open do |io|
            io.puts "<div class='col-lg-12 col-md-4 col-sm-6'>"
            io.puts "<div class='hint'>"
            io.puts "<p><b>Noteneingabe im Datentresor</b></p>"
            io.puts "<hr />"
            io.puts "<p>Die Noteneingabe im Datentresor schließt am Montag um 9:00 Uhr.</p>"
            io.puts "<div id='tresor_countdown_here' style='display: none;' data-deadline='#{Time.parse(deadline).to_i}'>"
            io.puts "</div>"
            io.puts "</div>"
            io.puts "</div>"
            io.string
        end
    end
    deadline = '2023-06-28T09:00:00'
    if Time.now.strftime('%Y-%m-%dT%H:%M:%S') <= deadline
        return StringIO.open do |io|
            io.puts "<div class='col-lg-12 col-md-4 col-sm-6'>"
            io.puts "<div class='hint'>"
            io.puts "<p><b>Markierung von SuS in den Listen für die Zeugniskonferenzen</b></p>"
            io.puts "<hr />"
            io.puts "<p>Klassenleitungen: Bitte markieren Sie SuS, die Sie in den Zeug&shy;nis&shy;kon&shy;feren&shy;zen besprechen möchten, bis Mittwoch um 9:00 Uhr. Hinweis: Alle SuS mit einer Note ab 4– sind schon auto&shy;matisch markiert.</p>"
            io.puts "<div id='tresor_countdown_here' style='display: none;' data-deadline='#{Time.parse(deadline).to_i}'>"
            io.puts "</div>"
            io.puts "</div>"
            io.puts "</div>"
            io.string
        end
    end
    deadline = '2023-07-05T12:00:00'
    if Time.now.strftime('%Y-%m-%dT%H:%M:%S') <= deadline
        return StringIO.open do |io|
            io.puts "<div class='col-lg-12 col-md-4 col-sm-6'>"
            io.puts "<div class='hint'>"
            io.puts "<p><b>Eintragung der Noten für das Arbeits- und Sozialverhalten</b></p>"
            io.puts "<hr />"
            io.puts "<p>Die Möglichkeit für Eintragungen der Noten für das Arbeits- und Sozialverhalten endet am Mittwoch um 12:00 Uhr. Bitte tragen Sie bis dahin fehlende Noten ein, damit die Klassenleitungen bis zu den Zeugniskonferenzen die Listen drucken können.</p>"
            io.puts "<div id='tresor_countdown_here' style='display: none;' data-deadline='#{Time.parse(deadline).to_i}'>"
            io.puts "</div>"
            io.puts "</div>"
            io.puts "</div>"
            io.string
        end
    end
    return ''
end

#public_events_table ⇒ Object 



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# File 'src/ruby/include/public_event.rb', line 106

def public_events_table()
    require_user_who_can_manage_news!
    self.class.refresh_public_event_config()
    StringIO.open do |io|
        description_for_key_and_key = {}
        @@public_event_config.each.with_index do |event, event_index|
            if event_index > 0
                io.puts "<hr />"
            end
            io.puts "<h3>#{event[:title]}</h3>"
            # if event[:description]
            #     io.puts event[:description]
            # end
            sign_ups = get_sign_ups_for_public_event(event[:key])
            io.puts "<div class='table-responsive' style='max-width: 100%; overflow-x: auto;' data-event-key='#{event[:key]}'>"
            io.puts "<div style='display: none;' class='event-title'>#{event[:title]}</div>"
            io.puts "<table style='table-layout: fixed;' class='table table-narrow narrow'>"
            colspan = event[:rows].map { |x| x[:entries].size }.max
            io.puts "<colgroup>"
            io.puts "<col style='width: 180px;'/>"
            colspan.times do
                io.puts "<col style='min-width: 200px;'/>"
            end
            io.puts "</colgroup>"
            if event[:headings]
                io.puts "<thead>"
                io.puts "<tr>"
                io.puts "<th>#{event[:headings][0]}</th>"
                io.puts "<th colspan='#{colspan}'>#{event[:headings][1]}</th>"
                io.puts "</tr>"
                io.puts "</thead>"
            end
            io.puts "<tbody>"
            event[:rows].each do |row|
                io.puts "<tr>"
                io.puts "<th>#{row[:description]}</th>"
                row[:entries].each do |entry|
                    description_for_key_and_key[event[:key]] ||= {}
                    description_for_key_and_key[event[:key]][entry[:key]] ||= entry[:description]
                    capacity = entry[:capacity] || 0
                    booked_count = (sign_ups[entry[:key]] || []).size
                    percent = 0
                    if capacity != 0
                        percent = booked_count * 100 / capacity
                    end
                    io.puts "<td><div style='display: flex; justify-content: space-between;'><div>#{entry[:description]}</div><div>(#{booked_count}/#{capacity})</div></div><div class='progress'><div class='progress-bar progress-bar-striped' role='progressbar' style='width: #{percent}%;'>#{(percent).to_i}%</div></div></td>"
                end
                io.puts "</tr>"
            end
            io.puts "</tbody>"
            io.puts "</table>"
            io.puts "</div>"
        end
        @@public_event_config.each.with_index do |event, event_index|
            sign_ups = get_sign_ups_for_public_event(event[:key])
            next if sign_ups.empty?
            io.puts "<hr />"
            io.puts "<h4>#{event[:title]}</h4>"
            io.puts "<div class='table-responsive' style='max-width: 100%; overflow-x: auto;' data-event-key='#{event[:key]}'>"
            io.puts "<table style='table-layout: fixed;' class='table table-narrow narrow'>"
            io.puts "<tr><th>E-Mail</th><th>Name</th><th>Track</th><th></th></tr>"
            io.puts "<tbody>"
            sign_ups.keys.sort.each do |key|
                sign_ups[key].each do |entry|
                    io.puts "<tr>"
                    io.puts "<td>#{entry[:email]}</td>"
                    io.puts "<td>#{entry[:name]}</td>"
                    io.puts "<td>#{description_for_key_and_key[event[:key]][key]}</td>"
                    io.puts "<td><button class='btn btn-xs btn-danger bu-delete-signup' data-tag='#{entry[:tag]}'><i class='fa fa-trash'></i>&nbsp;&nbsp;Löschen</button></td>"
                    io.puts "</tr>"
                end
            end
            io.puts "</tbody>"
            io.puts "</table>"
            io.puts "</div>"
        end
        io.string
    end
end

#purge_missing_sessions(current_sid = nil, remove_other = false) ⇒ Object 



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# File 'src/ruby/include/login.rb', line 301

def purge_missing_sessions(current_sid = nil, remove_other = false)
    sid = request.cookies['sid']
    existing_sids = []
    unless remove_other
        if (sid.is_a? String) && (sid =~ /^[0-9A-Za-z,]+$/)
            sids = sid.split(',')
            sids.each do |sid|
                if sid =~ /^[0-9A-Za-z]+$/
                    results = neo4j_query(<<~END_OF_QUERY, :sid => sid).map { |x| x['sid'] }
                        MATCH (s:Session {sid: $sid})-[:BELONGS_TO]->(u:User)
                        RETURN s.sid AS sid;
                    END_OF_QUERY
                    existing_sids << sid unless results.empty?
                end
            end
        end
        existing_sids.uniq!
    end
    if current_sid
        # insert current SID if it's not there yet (new sessions ID)
        unless existing_sids.include?(current_sid)
            existing_sids.unshift(current_sid)
        end
        # move current SID to front
        existing_sids -= [current_sid]
        existing_sids.unshift(current_sid)
    end
    new_cookie_value = existing_sids.join(',')
    if new_cookie_value.empty? && request.cookies['sid']
        response.delete_cookie('sid')
    end
    if (request.cookies['sid'] || '') != new_cookie_value
        response.set_cookie('sid',
                            :value => new_cookie_value,
                            :expires => Time.new + COOKIE_EXPIRY_TIME,
                            :path => '/',
                            :httponly => true,
                            :secure => DEVELOPMENT ? false : true)
    end
end

#purge_stale_second_factors ⇒ Object 



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# File 'src/ruby/include/login.rb', line 763

def purge_stale_second_factors
    neo4j_query(<<~END_OF_QUERY, :ts_now => Time.now.to_i)
        MATCH (sf:SecondFactor)
        WHERE sf.ts_expire < $ts_now
        DETACH DELETE sf;
    END_OF_QUERY
end

#recurse_arrays(path_array, value_array, prefix = [], index_prefix = [], &block) ⇒ Object 



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# File 'src/ruby/include/zeugnisse.rb', line 279

def recurse_arrays(path_array, value_array, prefix = [], index_prefix = [], &block)
    if path_array.empty?
        yield prefix.join('/'), value_array
        return
    end
    path_entry = path_array[0]
    key = path_entry[0]
    values = path_entry[1]
    values = [values] unless values.is_a? Array
    values.each.with_index do |value, i|
        recurse_arrays(path_array[1, path_array.size - 1], value_array[i], prefix + ["#{key}:#{value}"], index_prefix + [i], &block)
    end
end

#refresh_second_factor ⇒ Object 



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# File 'src/ruby/include/login.rb', line 788

def refresh_second_factor
    factors = neo4j_query(<<~END_OF_QUERY, :sid => @used_session[:sid], :ts_expire => Time.now.to_i + tresor_second_factor_ttl())
        MATCH (sf:SecondFactor)-[:BELONGS_TO]->(s:Session {sid: $sid})
        WHERE COALESCE(s.method, 'email') <> sf.method
        SET sf.ts_expire = $ts_expire
        RETURN sf;
    END_OF_QUERY
    return factors.first['sf'][:ts_expire] - Time.now.to_i
end

#require_admin! ⇒ Object

Assert that an admin is logged in



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# File 'src/ruby/include/user.rb', line 211

def require_admin!
    assert(admin_logged_in?)
end

#require_admin_2fa_hotline! ⇒ Object 



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# File 'src/ruby/include/user.rb', line 219

def require_admin_2fa_hotline!
    assert(admin_2fa_hotline_logged_in?)
end

#require_device! ⇒ Object 



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# File 'src/ruby/include/user.rb', line 201

def require_device!
    assert(!@session_device.nil?)
end

#require_monitor_or_user_who_can_manage_monitors! ⇒ Object

Assert that an admin is logged in



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# File 'src/ruby/include/user.rb', line 301

def require_monitor_or_user_who_can_manage_monitors!
    assert(monitor_logged_in? || user_who_can_manage_monitors_logged_in?)
end

#require_teacher! ⇒ Object

Assert that a teacher is logged in



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# File 'src/ruby/include/user.rb', line 224

def require_teacher!
    assert(teacher_logged_in?)
end

#require_teacher_for_lesson_or_ha_amt_logged_in(lesson_key) ⇒ Object 



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# File 'src/ruby/include/user.rb', line 309

def require_teacher_for_lesson_or_ha_amt_logged_in(lesson_key)
    assert(teacher_for_lesson_or_ha_amt_logged_in?(lesson_key))
end

#require_teacher_or_sv! ⇒ Object

Assert that a teacher or SV is logged in



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# File 'src/ruby/include/user.rb', line 296

def require_teacher_or_sv!
    assert(teacher_or_sv_logged_in?)
end

#require_teacher_or_user_who_can_manage_bib! ⇒ Object 



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# File 'src/ruby/include/user.rb', line 291

def require_teacher_or_user_who_can_manage_bib!
    assert(teacher_or_can_manage_bib_logged_in?)
end

#require_teacher_tablet! ⇒ Object

Assert that a teacher tablet is logged in



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# File 'src/ruby/include/user.rb', line 229

def require_teacher_tablet!
    assert(teacher_tablet_logged_in?)
end

#require_technikteam! ⇒ Object

Assert that a TechnikTeam user is logged in



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# File 'src/ruby/include/user.rb', line 254

def require_technikteam!
    assert(technikteam_logged_in?)
end

#require_user! ⇒ Object

Assert that a user is logged in



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# File 'src/ruby/include/user.rb', line 206

def require_user!
    assert(user_logged_in?, 'User is logged in', true)
end

#require_user_who_can_manage_agr_app! ⇒ Object

Assert that a user who can manage agrapp is logged in



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# File 'src/ruby/include/user.rb', line 283

def require_user_who_can_manage_agr_app!
    assert(can_manage_agr_app_logged_in?)
end

#require_user_who_can_manage_antikenfahrt! ⇒ Object

Assert that a user who can manage Antikenfahrt is logged in



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# File 'src/ruby/include/user.rb', line 278

def require_user_who_can_manage_antikenfahrt!
    assert(user_who_can_manage_antikenfahrt_logged_in?)
end

#require_user_who_can_manage_bib! ⇒ Object 



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# File 'src/ruby/include/user.rb', line 287

def require_user_who_can_manage_bib!
    assert(can_manage_bib_logged_in?)
end

#require_user_who_can_manage_monitors! ⇒ Object

Assert that a user who can manage monitors is logged in



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# File 'src/ruby/include/user.rb', line 249

def require_user_who_can_manage_monitors!
    assert(user_who_can_manage_monitors_logged_in?)
end

#require_user_who_can_manage_news! ⇒ Object

Assert that a user who can manage news is logged in



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# File 'src/ruby/include/user.rb', line 244

def require_user_who_can_manage_news!
    assert(user_who_can_manage_news_logged_in?)
end

#require_user_who_can_manage_salzh! ⇒ Object 



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# File 'src/ruby/include/user.rb', line 305

def require_user_who_can_manage_salzh!
    assert(can_manage_salzh_logged_in?)
end

#require_user_who_can_manage_tablets! ⇒ Object

Assert that a user who can manage tablets is logged in



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# File 'src/ruby/include/user.rb', line 269

def require_user_who_can_manage_tablets!
    assert(user_who_can_manage_tablets_logged_in?)
end

#require_user_who_can_manage_tablets_or_teacher! ⇒ Object 



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# File 'src/ruby/include/user.rb', line 273

def require_user_who_can_manage_tablets_or_teacher!
    assert(user_who_can_manage_tablets_or_teacher_logged_in?)
end

#require_user_who_can_report_tech_problems! ⇒ Object

Assert that a techpost user is logged in



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# File 'src/ruby/include/user.rb', line 259

def require_user_who_can_report_tech_problems!
    assert(user_who_can_report_tech_problems_logged_in?)
end

#require_user_who_can_report_tech_problems_or_better! ⇒ Object

Assert that a techpost user is logged in



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# File 'src/ruby/include/user.rb', line 264

def require_user_who_can_report_tech_problems_or_better!
    assert(user_who_can_report_tech_problems_or_better_logged_in?)
end

#require_user_who_can_upload_files! ⇒ Object

Assert that a user who can upload files is logged in



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# File 'src/ruby/include/user.rb', line 239

def require_user_who_can_upload_files!
    assert(user_who_can_upload_files_logged_in?)
end

#require_user_who_can_upload_vplan! ⇒ Object

Assert that a user who can upload vplan is logged in



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# File 'src/ruby/include/user.rb', line 234

def require_user_who_can_upload_vplan!
    assert(user_who_can_upload_vplan_logged_in?)
end

#require_zeugnis_admin! ⇒ Object 



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# File 'src/ruby/include/user.rb', line 215

def require_zeugnis_admin!
    assert(zeugnis_admin_logged_in?)
end

#respond(hash = {}) ⇒ Object 



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# File 'src/ruby/main.rb', line 1589

def respond(hash = {})
    @respond_hash = hash
end

#respond_raw_with_mimetype(content, mimetype) ⇒ Object 



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# File 'src/ruby/main.rb', line 1593

def respond_raw_with_mimetype(content, mimetype)
    @respond_content = content
    @respond_mimetype = mimetype
end

#respond_raw_with_mimetype_and_filename(content, mimetype, filename) ⇒ Object 



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# File 'src/ruby/main.rb', line 1598

def respond_raw_with_mimetype_and_filename(content, mimetype, filename)
    @respond_content = content
    @respond_mimetype = mimetype
    @respond_filename = filename
end

#rgb_to_hex(c) ⇒ Object 



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# File 'src/ruby/include/color.rb', line 74

def rgb_to_hex(c)
    sprintf('#%02x%02x%02x', c[0].to_i, c[1].to_i, c[2].to_i)
end

#rgb_to_hsv(c) ⇒ Object

ntlk.net/2011/11/21/convert-rgb-to-hsb-hsv-in-ruby/



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# File 'src/ruby/include/color.rb', line 20

def rgb_to_hsv(c)
    r = c[0] / 255.0
    g = c[1] / 255.0
    b = c[2] / 255.0
    max = [r, g, b].max
    min = [r, g, b].min
    delta = max - min
    v = max * 100

    if (max != 0.0)
        s = delta / max *100
    else
        s = 0.0
    end

    if (s == 0.0)
        h = 0.0
    else
        if (r == max)
            h = (g - b) / delta
        elsif (g == max)
            h = 2 + (b - r) / delta
        elsif (b == max)
            h = 4 + (r - g) / delta
        end

        h *= 60.0

        if (h < 0)
            h += 360.0
        end
    end
    [h, s, v]
end

#rgb_to_html(x) ⇒ Object 



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# File 'src/ruby/include/color.rb', line 101

def rgb_to_html(x)
    sprintf('#%02x%02x%02x', x[0], x[1], x[2])
end

#room_name_for_event(title, eid) ⇒ Object 



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# File 'src/ruby/include/jitsi.rb', line 82

def room_name_for_event(title, eid)
    "#{title} (#{eid[0, 8]})"
end

#running_zeugniskonferenzen ⇒ Object 



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# File 'src/ruby/include/monitor.rb', line 151

def running_zeugniskonferenzen
    sha1_and_t0_list = neo4j_query(<<~END_OF_QUERY, {:t1 => Time.now.to_i}).map { |x| [x['m.sha1'], x['m.t0']] }
        MATCH (m:MonitorZeugniskonferenzState)
        WHERE m.t1 IS NULL
        RETURN m.sha1, m.t0;
    END_OF_QUERY
    sha1_list = Set.new(sha1_and_t0_list.map { |x| x[0] })
    t0_for_sha1 = {}
    sha1_and_t0_list.each do |entry|
        t0_for_sha1[entry[0]] = entry[1]
    end
    result = {}
    today = Date.today.strftime('%Y-%m-%d')
    (ZEUGNISKONFERENZEN[today] || []).each do |entry|
        sha1 = Digest::SHA1.hexdigest([today, entry].to_json)[0, 16]
        if sha1_list.include?(sha1)
            result[entry[0]] = t0_for_sha1[sha1]
        end
    end
    result
end

#sanitize_poll_items(items) ⇒ Object 



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# File 'src/ruby/include/poll.rb', line 561

def sanitize_poll_items(items)
    items.map do |item|
        if item['type'] == 'radio' || item['type'] == 'checkbox'
            item['answers'].reject! { |x| x.strip.empty? }
        end
        item
    end
end

#schueler_for_lesson(lesson_key) ⇒ Object 



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# File 'src/ruby/include/directory.rb', line 620

def schueler_for_lesson(lesson_key)
    results = (@@schueler_for_lesson[lesson_key] || []).map do |email| 
        i = {}
        [:email, :first_name, :last_name, :display_name, :nc_login, :group2].each do |k| 
            i[k] = @@user_info[email][k]
        end
        i
    end
    temp = neo4j_query(<<~END_OF_QUERY, :email_addresses => (@@schueler_for_lesson[lesson_key] || []))
        MATCH (u:User)
        WHERE u.email IN $email_addresses
        RETURN u.email, COALESCE(u.group2, 'A') AS group2;
    END_OF_QUERY
    temp = Hash[temp.map { |x| [x['u.email'], x['group2']] }]
    results.map! do |x|
        x[:group2] = temp[x[:email]]
        x
    end
    results
end

#second_factor_time_left ⇒ Object 



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# File 'src/ruby/include/login.rb', line 771

def second_factor_time_left
    require_user!
    purge_stale_second_factors
    factors = neo4j_query(<<~END_OF_QUERY, :sid => @used_session[:sid])
        MATCH (sf:SecondFactor)-[:BELONGS_TO]->(s:Session {sid: $sid})
        WHERE COALESCE(s.method, 'email') <> sf.method
        RETURN sf;
    END_OF_QUERY
    return nil if factors.empty?
    return factors.first['sf'][:ts_expire] - Time.now.to_i
end

#self_tests_this_week ⇒ Object 



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# File 'src/ruby/include/salzh.rb', line 1045

def self_tests_this_week()
    d = Date.today
    while (d.wday != 1)
        d -= 1
    end
    d0 = d.strftime('%Y-%m-%d')
    d1 = (d + 6).strftime('%Y-%m-%d')

    rows = neo4j_query(<<~END_OF_QUERY, {:d0 => d0, :d1 => d1, :email => @session_user[:email]})
        MATCH (u:User {email: $email})-[:SELF_TESTED_ON]->(std:SelfTestDay)
        WHERE std.datum >= $d0 AND std.datum <= $d1
        RETURN std.datum AS datum
        ORDER BY std.datum;
    END_OF_QUERY
    rows.map do |x|
        i = Date.parse(x['datum']) - Date.parse(d0)
        {:datum => x['datum'], :label => %w(Montag Dienstag Mittwoch Donnerstag Freitag Samstag Sonntag)[i]}
    end
end

#send_sms(telephone_number, message) ⇒ Object 



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# File 'src/ruby/include/sms.rb', line 43

def send_sms(telephone_number, message)
    data = {:telephone_number => telephone_number, :message => message}
    debug "Sending SMS: #{data.to_json}"
    @@ws_clients[:authenticated_sms].values.first[:ws].send(data.to_json)
    ds = Date.today.strftime('%Y-%m-%d')
    neo4j_query(<<~END_OF_QUERY, {:ds => ds})
        MERGE (d:SmsDay {ds: $ds})
        SET d.count = COALESCE(d.count, 0) + 1;
    END_OF_QUERY
end

#session_user_has_streaming_button? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'src/ruby/main.rb', line 1403

def session_user_has_streaming_button?
    return false unless PROVIDE_CLASS_STREAM
    return false unless user_logged_in?
    return false if @session_user[:teacher]
    return false if class_stream_link_for_session_user.nil?
    return false unless @session_user[:homeschooling]
    return true
end

#session_user_jump_table_direction ⇒ Object 



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# File 'src/ruby/include/user.rb', line 511

def session_user_jump_table_direction
    require_user!
    method = neo4j_query_expect_one(<<~END_OF_QUERY, :email => @session_user[:email])['method']
        MATCH (u:User {email: $email})
        RETURN COALESCE(u.jump_table_direction, "rows") AS method;
    END_OF_QUERY
    method
end

#session_user_otp_qr_code(reveal = false) ⇒ Object 



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# File 'src/ruby/include/otp.rb', line 51

def session_user_otp_qr_code(reveal = false)
    require_user!
    otp_token = @session_user[:otp_token]
    return nil if otp_token.nil?
    return '(redacted)' unless reveal
    totp = ROTP::TOTP.new(otp_token, issuer: "Dashboard")
    uri = totp.provisioning_uri(@session_user[:email])
    qrcode = RQRCode::QRCode.new(uri, 7)
    svg = qrcode.as_svg(offset: 0, color: '000', shape_rendering: 'crispEdges',
                        module_size: 4, standalone: true)
    svg.gsub("\n", '')
end

#session_user_otp_token_good_for_tresor ⇒ Object 



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# File 'src/ruby/include/otp.rb', line 64

def session_user_otp_token_good_for_tresor()
    require_user!
    otp_token = @session_user[:otp_token]
    return false if otp_token.nil?
    return @session_user[:otp_token_changed] < DateTime.now.strftime('%Y-%m-%d')
end

#session_user_preferred_login_method ⇒ Object 



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# File 'src/ruby/include/user.rb', line 490

def 
    require_user!
    method = neo4j_query_expect_one(<<~END_OF_QUERY, :email => @session_user[:email])['method']
        MATCH (u:User {email: $email})
        RETURN COALESCE(u.preferred_login_method, "email") AS method;
    END_OF_QUERY
    method
end

#session_user_telephone_number ⇒ Object 



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# File 'src/ruby/include/sms.rb', line 29

def session_user_telephone_number
    require_user!
    telephone_number = @session_user[:telephone_number]
    return nil if telephone_number.nil?
    return '(redacted)'
end

#session_user_telephone_number_good_for_tresor ⇒ Object 



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# File 'src/ruby/include/sms.rb', line 36

def session_user_telephone_number_good_for_tresor()
    require_user!
    telephone_number = @session_user[:telephone_number]
    return false if telephone_number.nil?
    return @session_user[:telephone_number_changed] < DateTime.now.strftime('%Y-%m-%d')
end

#shift_hue(c, f = 60) ⇒ Object 



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# File 'src/ruby/include/color.rb', line 85

def shift_hue(c, f = 60)
    hsv = rgb_to_hsv(hex_to_rgb(c))
    hsv[0] = (hsv[0] + f) % 360.0
    rgb_to_hex(hsv_to_rgb(hsv))
end

#skytale(s, w) ⇒ Object 



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# File 'src/ruby/include/cypher.rb', line 171

def skytale(s, w)
    s = s.upcase.gsub(' ', '')
    t = ''
    (0...w).each do |x|
        i = x
        while i < s.size
            t += s[i]
            i += w
        end
    end
    t
end

#sus_logged_in? ⇒ Boolean

Returns true if a SuS is logged in.

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 106

def sus_logged_in?
    user_logged_in? && (!(@session_user[:teacher] == true))
end

#tablet_logged_in? ⇒ Boolean

Returns true if a tablet is logged in.

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 131

def tablet_logged_in?
    user_logged_in? && @session_user[:is_tablet]
end

#teacher_for_lesson_or_ha_amt_logged_in?(lesson_key) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 147

def teacher_for_lesson_or_ha_amt_logged_in?(lesson_key)
    if teacher_logged_in?
        return true
    else
        return get_ha_amt_lesson_keys.include?(lesson_key)
    end
end

#teacher_logged_in? ⇒ Boolean

Returns true if a teacher is logged in.

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 91

def teacher_logged_in?
    user_logged_in? && (@session_user[:teacher] == true)
end

#teacher_or_can_manage_bib_logged_in? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 185

def teacher_or_can_manage_bib_logged_in?
    teacher_logged_in? || can_manage_bib_logged_in?
end

#teacher_or_sv_logged_in? ⇒ Boolean

Returns true if a teacher or SV is logged in.

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 63

def teacher_or_sv_logged_in?
    user_logged_in? && (teacher_logged_in? || @session_user[:sv])
end

#teacher_tablet_logged_in? ⇒ Boolean

Returns true if a teacher tablet is logged in.

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 111

def teacher_tablet_logged_in?
    user_logged_in? && @session_user[:is_tablet] && @session_user[:tablet_type] == :teacher
end

#technikteam_logged_in? ⇒ Boolean

Returns true if a TechnikTeam is logged in.

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 33

def technikteam_logged_in?
    user_logged_in? && @session_user[:technikteam]
end

#test_request_parameter(data, key, options) ⇒ Object 



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# File 'src/ruby/main.rb', line 1352

def test_request_parameter(data, key, options)
    type = ((options[:types] || {})[key]) || String
    assert(data[key.to_s].is_a?(type), "#{key.to_s} is a #{type}")
    if type == String
        assert(data[key.to_s].size <= (options[:max_value_lengths][key] || options[:max_string_length]), 'too_much_data')
    end
end

#this_is_a_page_for_devices ⇒ Object 



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# File 'src/ruby/include/user.rb', line 320

def this_is_a_page_for_devices
    if @session_device.nil?
        redirect "#{WEB_ROOT}/", 303
    end
end

#this_is_a_page_for_logged_in_admins ⇒ Object

Put this on top of a webpage to assert that this page can be opened by admins only



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# File 'src/ruby/include/user.rb', line 339

def this_is_a_page_for_logged_in_admins
    unless admin_logged_in?
        redirect "#{WEB_ROOT}/", 303
    end
end

#this_is_a_page_for_logged_in_gev ⇒ Object 



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# File 'src/ruby/include/user.rb', line 332

def this_is_a_page_for_logged_in_gev
    unless gev_logged_in?
        redirect "#{WEB_ROOT}/", 303
    end
end

#this_is_a_page_for_logged_in_teachers ⇒ Object

Put this on top of a webpage to assert that this page can be opened by teachers only



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# File 'src/ruby/include/user.rb', line 353

def this_is_a_page_for_logged_in_teachers
    unless teacher_logged_in?
        redirect "#{WEB_ROOT}/", 303
    end
end

#this_is_a_page_for_logged_in_teachers_or_can_manage_bib ⇒ Object

Put this on top of a webpage to assert that this page can be opened by teachers only or users who can manage the library



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# File 'src/ruby/include/user.rb', line 360

def this_is_a_page_for_logged_in_teachers_or_can_manage_bib
    unless teacher_or_can_manage_bib_logged_in?
        redirect "#{WEB_ROOT}/", 303
    end
end

#this_is_a_page_for_logged_in_teachers_or_sv ⇒ Object

Put this on top of a webpage to assert that this page can be opened by teachers or SV only



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# File 'src/ruby/include/user.rb', line 367

def this_is_a_page_for_logged_in_teachers_or_sv
    unless teacher_or_sv_logged_in?
        redirect "#{WEB_ROOT}/", 303
    end
end

#this_is_a_page_for_logged_in_teachers_or_sv_or_users_who_can_manage_tablets ⇒ Object 



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# File 'src/ruby/include/user.rb', line 373

def this_is_a_page_for_logged_in_teachers_or_sv_or_users_who_can_manage_tablets
    unless teacher_or_sv_logged_in? || user_who_can_manage_tablets_logged_in?
        redirect "#{WEB_ROOT}/", 303
    end
end

#this_is_a_page_for_logged_in_users ⇒ Object

Put this on top of a webpage to assert that this page can be opened by logged in users only



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# File 'src/ruby/include/user.rb', line 314

def this_is_a_page_for_logged_in_users
    unless user_logged_in?
        redirect "#{WEB_ROOT}/", 303
    end
end

#this_is_a_page_for_logged_in_users_who_can_manage_salzh ⇒ Object 



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# File 'src/ruby/include/user.rb', line 326

def this_is_a_page_for_logged_in_users_who_can_manage_salzh
    unless can_manage_salzh_logged_in?
        redirect "#{WEB_ROOT}/", 303
    end
end

#this_is_a_page_for_logged_in_zeugnis_admins ⇒ Object

Put this on top of a webpage to assert that this page can be opened by zeugnis admins only



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# File 'src/ruby/include/user.rb', line 346

def this_is_a_page_for_logged_in_zeugnis_admins
    unless zeugnis_admin_logged_in?
        redirect "#{WEB_ROOT}/", 303
    end
end

#this_is_a_page_for_people_who_can_manage_monitors ⇒ Object

Put this on top of a webpage to assert that this page can be opened by users who can manage monitors only



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# File 'src/ruby/include/user.rb', line 401

def this_is_a_page_for_people_who_can_manage_monitors
    unless user_who_can_manage_monitors_logged_in?
        redirect "#{WEB_ROOT}/", 303
    end
end

#this_is_a_page_for_people_who_can_manage_news ⇒ Object

Put this on top of a webpage to assert that this page can be opened by users who can manage news only



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# File 'src/ruby/include/user.rb', line 394

def this_is_a_page_for_people_who_can_manage_news
    unless user_who_can_manage_news_logged_in?
        redirect "#{WEB_ROOT}/", 303
    end
end

#this_is_a_page_for_people_who_can_upload_files ⇒ Object

Put this on top of a webpage to assert that this page can be opened by users who can upload files only



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# File 'src/ruby/include/user.rb', line 387

def this_is_a_page_for_people_who_can_upload_files
    unless user_who_can_upload_files_logged_in?
        redirect "#{WEB_ROOT}/", 303
    end
end

#this_is_a_page_for_people_who_can_upload_vplan ⇒ Object

Put this on top of a webpage to assert that this page can be opened by users who can upload vplan only



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# File 'src/ruby/include/user.rb', line 380

def this_is_a_page_for_people_who_can_upload_vplan
    unless user_who_can_upload_vplan_logged_in?
        redirect "#{WEB_ROOT}/", 303
    end
end

#tr_klasse(klasse) ⇒ Object 



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# File 'src/ruby/main.rb', line 469

def tr_klasse(klasse)
    KLASSEN_TR[klasse] || klasse
end

#tresor_second_factor_ttl ⇒ Object 



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# File 'src/ruby/include/login.rb', line 699

def tresor_second_factor_ttl
    today = Date.today.strftime('%Y-%m-%d')
    if zeugnis_admin_logged_in? && ZEUGNISKONFERENZEN.include?(today)
        TRESOR_SECOND_FACTOR_TTL * 4
    else
        TRESOR_SECOND_FACTOR_TTL
    end
end

#trigger_send_invites ⇒ Object 



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# File 'src/ruby/main.rb', line 1644

def trigger_send_invites()
    begin
        http = Net::HTTP.new('invitation_bot', 8080)
        response = http.request(Net::HTTP::Get.new("/api/send_invites"))
    rescue StandardError => e
        STDERR.puts e
    end
end

#trigger_update(which) ⇒ Object 



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# File 'src/ruby/main.rb', line 1626

def trigger_update(which)
    begin
        http = Net::HTTP.new('timetable', 8080)
        response = http.request(Net::HTTP::Get.new("/api/update/#{which}"))
    rescue StandardError => e
        STDERR.puts e
    end
end

#trigger_update_images ⇒ Object 



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# File 'src/ruby/main.rb', line 1635

def trigger_update_images()
    begin
        http = Net::HTTP.new('image_bot', 8080)
        response = http.request(Net::HTTP::Get.new("/api/update_all"))
    rescue StandardError => e
        STDERR.puts e
    end
end

#update_monitors ⇒ Object 



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# File 'src/ruby/include/monitor.rb', line 54

def update_monitors
    update_monitors_message()
    update_monitors_vplan()
end

#update_monitors_message ⇒ Object 



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# File 'src/ruby/include/monitor.rb', line 35

def update_monitors_message
    (@@ws_clients[:monitor] || {}).each_pair do |client_id, info|
        ws = info[:ws]
        ws.send({:command => 'update_monitor_messages', :data => get_monitor_messages}.to_json)
    end
end

#update_monitors_vplan ⇒ Object 



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# File 'src/ruby/include/monitor.rb', line 42

def update_monitors_vplan
    (@@ws_clients[:monitor] || {}).each_pair do |client_id, info|
        ws = info[:ws]
        monitor_data = {:klassen => {}, :timestamp => ''}
        monitor_data_path = '/vplan/monitor/monitor.json'
        if File.exist?(monitor_data_path)
            monitor_data = JSON.parse(File.read(monitor_data_path))
        end
        ws.send({:command => 'update_vplan', :data => monitor_data}.to_json)
    end
end

#user_icon(email, c = nil) ⇒ String

Return a <div> with a background image taken from a user's Nextcloud account, with a gray background as a default fallback.

Parameters:

  • email (String) —

    the user's email address

  • c (String) (defaults to: nil) —

    a CSS class to apply to the div (e. g. avatar-lg)

Returns:

  • (String) —

    the HTML string describing the <div>



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# File 'src/ruby/include/user.rb', line 412

def user_icon(email, c = nil)
    "<div style='background-image: url(#{NEXTCLOUD_URL}/index.php/avatar/#{@@user_info[email][:nc_login]}/128), url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mO88h8AAq0B1REmZuEAAAAASUVORK5CYII=);' class='#{c}'></div>"
end

#user_is_eligible_for_sms? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'src/ruby/include/sms.rb', line 19

def user_is_eligible_for_sms?
    return false unless user_logged_in?
    return true if SMS_AUTH_UNLOCKED_FOR.nil?
    return teacher_logged_in? || SMS_AUTH_UNLOCKED_FOR.include?(@session_user[:email])
end

#user_is_eligible_for_tresor? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'src/ruby/include/tresor.rb', line 3

def user_is_eligible_for_tresor?
    return admin_logged_in?
    # return teacher_logged_in?
    # return false unless user_logged_in?
    # return false if DATENTRESOR_UNLOCKED_FOR.nil?
    # return false unless teacher_logged_in?
    # return true if teacher_logged_in? && DEVELOPMENT
    # return teacher_logged_in? && DATENTRESOR_UNLOCKED_FOR.include?(@session_user[:email])
end

#user_logged_in? ⇒ Boolean

Returns true if a user is logged in.

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 3

def user_logged_in?
    !@session_user.nil?
end

#user_who_can_manage_ags_logged_in? ⇒ Boolean

Returns true if a user who can manage AGs is logged in.

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 23

def user_who_can_manage_ags_logged_in?
    user_logged_in? && @session_user[:can_manage_ags]
end

#user_who_can_manage_antikenfahrt_logged_in? ⇒ Boolean

Returns true if a user who can manage Antikenfahrt is logged in.

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 58

def user_who_can_manage_antikenfahrt_logged_in?
    user_logged_in? && @session_user[:can_manage_antikenfahrt]
end

#user_who_can_manage_monitors_logged_in? ⇒ Boolean

Returns true if a user who can manage monitors is logged in.

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 28

def user_who_can_manage_monitors_logged_in?
    user_logged_in? && @session_user[:can_manage_monitors]
end

#user_who_can_manage_news_logged_in? ⇒ Boolean

Returns true if a user who can manage news is logged in.

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 18

def user_who_can_manage_news_logged_in?
    user_logged_in? && @session_user[:can_manage_news]
end

#user_who_can_manage_tablets_logged_in? ⇒ Boolean

Returns true if a user who can manage tablets is logged in.

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 43

def user_who_can_manage_tablets_logged_in?
    user_logged_in? && @session_user[:can_manage_tablets]
end

#user_who_can_manage_tablets_or_sv_or_teacher_logged_in? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 52

def user_who_can_manage_tablets_or_sv_or_teacher_logged_in?
    return teacher_or_sv_logged_in? || user_who_can_manage_tablets_logged_in?
end

#user_who_can_manage_tablets_or_teacher_logged_in? ⇒ Boolean

Returns true if a user who can manage tablets or teacher is logged in.

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 48

def user_who_can_manage_tablets_or_teacher_logged_in?
    user_who_can_manage_tablets_logged_in? || teacher_logged_in?
end

#user_who_can_report_tech_problems_logged_in? ⇒ Boolean

Returns true if a techpost user is logged in.

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 156

def user_who_can_report_tech_problems_logged_in?
    user_logged_in? && check_has_technikamt(@session_user[:email]) == [{"hasRelation"=>true}]
end

#user_who_can_report_tech_problems_or_better_logged_in? ⇒ Boolean

Returns true if a techpost or better user is logged in.

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 161

def user_who_can_report_tech_problems_or_better_logged_in?
    user_logged_in? && (check_has_technikamt(@session_user[:email]) == [{"hasRelation"=>true}] || @session_user[:can_manage_tablets])
end

#user_who_can_upload_files_logged_in? ⇒ Boolean

Returns true if a user who can upload files is logged in.

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 13

def user_who_can_upload_files_logged_in?
    user_logged_in? && @session_user[:can_upload_files]
end

#user_who_can_upload_vplan_logged_in? ⇒ Boolean

Returns true if a user who can upload vplan is logged in.

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 8

def user_who_can_upload_vplan_logged_in?
    user_logged_in? && @session_user[:can_upload_vplan]
end

#vote_codes_from_token(vote_code, token, _count) ⇒ Object 



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# File 'src/ruby/include/vote.rb', line 73

def vote_codes_from_token(vote_code, token, _count)
    count = ((_count + 20) / 4).to_i * 4
    vote_code = sprintf('%04d', vote_code)
    codes = []
    i = 0
    while codes.size < count do
        v = "#{token}#{i}"
        code = Digest::SHA1.hexdigest(v).to_i(16).to_s(10)[0, 8]
        code.insert(1, vote_code[0])
        code.insert(4, vote_code[1])
        code.insert(7, vote_code[2])
        code.insert(10, vote_code[3])
        codes << code unless codes.include?(code)
        i += 1
    end
    codes
end

#zeugnis_admin_logged_in? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'src/ruby/include/user.rb', line 72

def zeugnis_admin_logged_in?
    user_logged_in? && ZEUGNIS_ADMIN_USERS.include?(@session_user[:email])
end