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"""
iCalendar feed generation library -- used for generating
iCalendar feeds.
Sample usage:
>>> from django_ical import feedgenerator
>>> from datetime import datetime
>>> feed = feedgenerator.ICal20Feed(
... title="My Events",
... link="http://www.example.com/events.ical",
... description="A iCalendar feed of my events.",
... language="en",
... )
>>> feed.add_item(
... title="Hello",
... link="http://www.example.com/test/",
... description="Testing."
... start_datetime=datetime(2012, 5, 6, 10, 00),
... end_datetime=datetime(2012, 5, 6, 12, 00),
... )
>>> fp = open('test.ical', 'w')
>>> feed.write(fp, 'utf-8')
>>> fp.close()
For definitions of the iCalendar format see:
http://www.ietf.org/rfc/rfc2445.txt
"""
from icalendar import Calendar, Event
from django.utils.feedgenerator import SyndicationFeed
__all__ = ("ICal20Feed", "DefaultFeed")
FEED_FIELD_MAP = (
("product_id", "prodid"),
("method", "method"),
("title", "x-wr-calname"),
("description", "x-wr-caldesc"),
("timezone", "x-wr-timezone"),
(
"ttl",
"x-published-ttl",
), # See format here: http://www.rfc-editor.org/rfc/rfc2445.txt (sec 4.3.6)
)
ITEM_EVENT_FIELD_MAP = (
# 'item_guid' becomes 'unique_id' when passed to the SyndicationFeed
("unique_id", "uid"),
("title", "summary"),
("description", "description"),
("start_datetime", "dtstart"),
("end_datetime", "dtend"),
("updateddate", "last-modified"),
("created", "created"),
("timestamp", "dtstamp"),
("transparency", "transp"),
("location", "location"),
("geolocation", "geo"),
("link", "url"),
("organizer", "organizer"),
("categories", "categories"),
("rrule", "rrule"),
("exrule", "exrule"),
("rdate", "rdate"),
("exdate", "exdate"),
("status", "status"),
("attendee", "attendee"),
("valarm", None),
)
class ICal20Feed(SyndicationFeed):
"""
iCalendar 2.0 Feed implementation.
"""
mime_type = "text/calendar; charset=utf8"
def write(self, outfile, encoding): # pylint: disable=unused-argument
"""
Writes the feed to the specified file in the
specified encoding.
"""
cal = Calendar()
cal.add("version", "2.0")
cal.add("calscale", "GREGORIAN")
for ifield, efield in FEED_FIELD_MAP:
val = self.feed.get(ifield)
if val is not None:
cal.add(efield, val)
self.write_items(cal)
to_ical = getattr(cal, "as_string", None)
if not to_ical:
to_ical = cal.to_ical
outfile.write(to_ical())
def write_items(self, calendar):
"""
Write all events to the calendar
"""
for item in self.items:
event = Event()
for ifield, efield in ITEM_EVENT_FIELD_MAP:
val = item.get(ifield)
if val is not None:
if ifield == "attendee":
for list_item in val:
event.add(efield, list_item)
elif ifield == "valarm":
for list_item in val:
event.add_component(list_item)
else:
event.add(efield, val)
calendar.add_component(event)
DefaultFeed = ICal20Feed
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