#    Copyright (C) 2017  Alban Gruin
#
#    celcatsanitizer is free software; you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation; either version 2 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 General Public License for more details.
#
#    You should have received a copy of the GNU General Public License along
#    with celcatsanitizer; if not, write to the Free Software Foundation, Inc.,
#    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

from django.contrib.syndication.views import Feed
from django.utils.feedgenerator import SyndicationFeed

from icalendar import Calendar, Event


class IcalFeed(SyndicationFeed):
    content_type = "text/calendar; charset=utf-8"
    __ical_names = {"name": "summary",
                    "notes": "description",
                    "rooms": "location",
                    "begin": "dtbegin",
                    "end": "dtend"}

    def write(self, outfile, encoding):
        calendar = Calendar()
        calendar.add("version", "2.0")

        write_events(calendar)
        outfile.write(calendar.to_ical())

    def write_events(self, calendar):
        for item in items:
            event = Event()
            for key, value in item.items():
                if key in __ical_names:
                    event.add(__ical_names[key], value)