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annotate gpp/gcalendar/calendar.py @ 203:40e5903903e1

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Should have added signals.py in r203.
author Brian Neal <bgneal@gmail.com>
date Wed, 28 Apr 2010 03:00:31 +0000
parents 9c18250972d5
children d77e0dc772ad
rev   line source
gremmie@1 1 """
gremmie@1 2 This file contains the calendar class wich abstracts the Google gdata API for working with
gremmie@1 3 Google Calendars.
gremmie@1 4 """
gremmie@1 5 import datetime
gremmie@1 6 import pytz
gremmie@1 7
gremmie@1 8 from django.utils.tzinfo import FixedOffset
gremmie@1 9 from gdata.calendar.service import CalendarService
gremmie@1 10 from gdata.calendar import CalendarEventFeed
gremmie@1 11 from gdata.calendar import CalendarEventEntry
gremmie@1 12 from gdata.calendar import Who
gremmie@1 13 from gdata.calendar import Where
gremmie@1 14 from gdata.calendar import When
gremmie@1 15 from gdata.service import BadAuthentication
gremmie@1 16 import atom
gremmie@1 17
gremmie@1 18 from gcalendar.models import Event
gremmie@1 19
gremmie@1 20
gremmie@1 21 class CalendarError(Exception):
bgneal@68 22 def __init__(self, msg):
bgneal@68 23 self.msg = msg
gremmie@1 24
gremmie@1 25 def __str__(self):
bgneal@68 26 return repr(self.msg)
gremmie@1 27
gremmie@1 28
gremmie@1 29 class Calendar(object):
gremmie@1 30 DATE_FMT = '%Y-%m-%d'
gremmie@1 31 DATE_TIME_FMT = DATE_FMT + 'T%H:%M:%S'
gremmie@1 32 DATE_TIME_TZ_FMT = DATE_TIME_FMT + '.000Z'
gremmie@1 33
gremmie@1 34 def __init__(self, email, password, calendar_id='default'):
gremmie@1 35 self.client = CalendarService()
gremmie@1 36 self.client.email = email
gremmie@1 37 self.client.password = password
gremmie@1 38 self.client.source = 'Google-Calendar_Python_GCalendar'
gremmie@1 39 self.insert_feed = '/calendar/feeds/%s/private/full' % calendar_id
gremmie@1 40 self.batch_feed = '%s/batch' % self.insert_feed
gremmie@1 41 try:
gremmie@1 42 self.client.ProgrammaticLogin()
gremmie@1 43 except BadAuthentication:
bgneal@68 44 raise CalendarError('Incorrect password')
gremmie@1 45 except Exception, e:
bgneal@68 46 raise CalendarError(str(e))
gremmie@1 47
gremmie@1 48 def sync_events(self, qs):
gremmie@1 49 request_feed = CalendarEventFeed()
gremmie@1 50 for model in qs:
gremmie@1 51 if model.status == Event.NEW_APRV:
gremmie@1 52 event = CalendarEventEntry()
gremmie@1 53 request_feed.AddInsert(entry=self._populate_event(model, event))
gremmie@1 54 elif model.status == Event.EDIT_APRV:
gremmie@1 55 event = self._retrieve_event(model)
gremmie@1 56 request_feed.AddUpdate(entry=self._populate_event(model, event))
gremmie@1 57 elif model.status == Event.DEL_APRV:
gremmie@1 58 event = self._retrieve_event(model)
gremmie@1 59 request_feed.AddDelete(entry=event)
gremmie@1 60 else:
gremmie@1 61 assert False, 'unexpected status in sync_events'
gremmie@1 62
bgneal@68 63 try:
bgneal@68 64 response_feed = self.client.ExecuteBatch(request_feed, self.batch_feed)
bgneal@68 65 except Exception, e:
bgneal@68 66 raise CalendarError('ExecuteBatch exception: %s' % e)
bgneal@68 67
gremmie@1 68 err_msgs = []
gremmie@1 69 for entry in response_feed.entry:
gremmie@1 70 i = int(entry.batch_id.text)
gremmie@1 71 code = int(entry.batch_status.code)
gremmie@1 72
gremmie@1 73 error = False
gremmie@1 74 if qs[i].status == Event.NEW_APRV or qs[i].status == Event.EDIT_APRV:
gremmie@1 75 if (code == 201 and qs[i].status == Event.NEW_APRV) or \
gremmie@1 76 (code == 200 and qs[i].status == Event.EDIT_APRV):
gremmie@1 77 qs[i].google_id = entry.id.text
gremmie@1 78 qs[i].status = Event.ON_CAL
gremmie@1 79 qs[i].save()
gremmie@1 80 else:
gremmie@1 81 error = True
gremmie@1 82 elif qs[i].status == Event.DEL_APRV:
gremmie@1 83 if code == 200:
gremmie@1 84 qs[i].delete()
gremmie@1 85 else:
gremmie@1 86 error = True
gremmie@1 87
gremmie@1 88 if error:
bgneal@124 89 err_msgs.append('%s - (%d) %s' % (
bgneal@124 90 qs[i].what, code, entry.batch_status.reason))
gremmie@1 91
gremmie@1 92 if len(err_msgs) > 0:
bgneal@68 93 raise CalendarError(', '.join(err_msgs))
gremmie@1 94
gremmie@1 95 def _retrieve_event(self, model):
gremmie@1 96 try:
gremmie@1 97 event = self.client.GetCalendarEventEntry(model.google_id)
bgneal@68 98 except Exception, e:
bgneal@68 99 raise CalendarError('Could not retrieve event from Google: %s, %s' \
bgneal@68 100 % (model.what, e))
gremmie@1 101 return event
gremmie@1 102
gremmie@1 103 def _populate_event(self, model, event):
gremmie@1 104 """Populates a gdata event from an Event model object."""
gremmie@1 105 event.title = atom.Title(text=model.what)
gremmie@1 106 event.content = atom.Content(text=model.html)
gremmie@1 107 event.where = [Where(value_string=model.where)]
gremmie@1 108 event.who = [Who(name=model.user.username, email=model.user.email)]
gremmie@1 109
gremmie@1 110 if model.all_day:
gremmie@1 111 start_time = self._make_time(model.start_date)
gremmie@1 112 if model.start_date == model.end_date:
gremmie@1 113 end_time = None
gremmie@1 114 else:
gremmie@1 115 end_time = self._make_time(model.end_date)
gremmie@1 116 else:
gremmie@1 117 start_time = self._make_time(model.start_date, model.start_time, model.time_zone)
gremmie@1 118 end_time = self._make_time(model.end_date, model.end_time, model.time_zone)
gremmie@1 119
gremmie@1 120 event.when = [When(start_time=start_time, end_time=end_time)]
gremmie@1 121 return event
gremmie@1 122
gremmie@1 123 def _make_time(self, date, time=None, tz_name=None):
gremmie@1 124 """
gremmie@1 125 Returns the gdata formatted date/time string given a date, optional time,
gremmie@1 126 and optional time zone name (e.g. 'US/Pacific'). If the time zone name is None,
gremmie@1 127 no time zone info will be added to the string.
gremmie@1 128 """
gremmie@1 129
gremmie@1 130 if time is not None:
gremmie@1 131 d = datetime.datetime.combine(date, time)
gremmie@1 132 else:
gremmie@1 133 d = datetime.datetime(date.year, date.month, date.day)
gremmie@1 134
gremmie@1 135 if time is None:
gremmie@1 136 s = d.strftime(self.DATE_FMT)
gremmie@1 137 elif tz_name is None:
gremmie@1 138 s = d.strftime(self.DATE_TIME_FMT)
gremmie@1 139 else:
gremmie@1 140 try:
gremmie@1 141 tz = pytz.timezone(tz_name)
gremmie@1 142 except pytz.UnknownTimeZoneError:
bgneal@68 143 raise CalendarError('Invalid time zone: %s' (tz_name,))
gremmie@1 144 local = tz.localize(d)
gremmie@1 145 zulu = local.astimezone(FixedOffset(0))
gremmie@1 146 s = zulu.strftime(self.DATE_TIME_TZ_FMT)
gremmie@1 147
gremmie@1 148 return s
gremmie@1 149