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#    Copyright (C) 2017  Alban Gruin
#
#    celcatsanitizer is free software: you can redistribute it and/or modify
#    it under the terms of the GNU Affero General Public License as published
#    by the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    celcatsanitizer is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU Affero General Public License for more details.
#
#    You should have received a copy of the GNU Affero General Public License
#    along with celcatsanitizer.  If not, see <http://www.gnu.org/licenses/>.

from django import template

register = template.Library()


@register.filter
def format_rooms(rooms):
    amphi_list = [room.name for room in rooms if room.name.startswith("Amphi")]
    room_list = [room.name for room in rooms
                 if not room.name.startswith("Amphi")]

    amphis = ", ".join(amphi_list)
    joined = ", ".join(room_list)

    if len(room_list) > 1:
        joined = "alles " + joined
    elif len(room_list) == 1:
        joined = "alle " + joined

    if len(amphi_list) == 0 and len(room_list) == 0:
        return ""
    elif len(amphi_list) == 0:
        return "S" + joined
    elif len(room_list) == 0:
        return amphis
    else:
        return amphis + ", s" + joined