Use event ID for the cutoff point

Author: alexiri

outlook/indico_outlook/calendar.py

@@ -5,10 +5,8 @@
 # them and/or modify them under the terms of the MIT License; see
 # the LICENSE file for more details.
 
-from datetime import datetime
 from pprint import pformat
 
-import pytz
 import requests
 from markupsafe import Markup
 from requests.exceptions import RequestException, Timeout
@@ -116,7 +114,7 @@ def _update_calendar_entry(entry, settings):
         return True
 
     # Use common format for event calendar ID if the event was created on or after 2025-04-06
-    if entry.event.created_dt >= datetime(2025, 4, 6, tzinfo=pytz.UTC):
+    if settings['event_id_cutoff'] != -1 and entry.event_id > settings['event_id_cutoff']:
         unique_id = entry.event.ical_uid
     else:
         unique_id = '{}{}_{}'.format(settings['id_prefix'], user.id, entry.event_id)

outlook/indico_outlook/plugin.py

@@ -52,6 +52,9 @@ class SettingsForm(IndicoForm):
     id_prefix = StringField(_('Prefix'),
                             description=_('Prefix for calendar item IDs. If you change this, existing calendar entries '
                                           'cannot be deleted/updated anymore!'))
+    event_id_cutoff = IntegerField(_('Event ID Cutoff'), [NumberRange(min=-1)],
+                                    description=_('Last event ID before switching to new calendar item ID format.'
+                                                  ' Set to -1 to keep the old format for all calendar items.'))
     timeout = FloatField(_('Request timeout'), [NumberRange(min=0.25)], description=_('Request timeout in seconds'))
     max_event_duration = TimeDeltaField(_('Maximum Duration'), [DataRequired()], units=('days',),
                                         description=_('Events lasting longer will not be sent to Exchange'))
@@ -144,6 +147,7 @@ class OutlookPlugin(IndicoPlugin):
         'reminder': True,
         'reminder_minutes': 15,
         'id_prefix': 'indico_',
+        'event_id_cutoff': -1,
         'timeout': 3,
         'max_event_duration': timedelta(days=30)
     }