Switch to Event.ical_uid

Author: alexiri

outlook/indico_outlook/calendar.py

@@ -6,6 +6,7 @@
 # the LICENSE file for more details.
 
 from datetime import datetime
+import pytz
 from pprint import pformat
 from urllib.parse import urlsplit
 
@@ -116,9 +117,9 @@ def _update_calendar_entry(entry, settings):
         logger.debug('User %s has disabled calendar entries', user)
         return True
 
-    # Use common format for event calendar ID if the event was created on or after 2025-04-01
-    if entry.event.created_dt >= datetime(2025, 4, 1):
-        unique_id = f'indico-event-{entry.event_id}@{urlsplit(config.BASE_URL).hostname}'
+    # 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):
+        unique_id = entry.event.ical_uid
     else:
         unique_id = '{}{}_{}'.format(settings['id_prefix'], user.id, entry.event_id)
     path = f'/api/v1/users/{user.email}/events/{unique_id}'