handle malformed events from ics calendars (#2281)

ref: https://python-software-foundation.sentry.io/issues/4210332341/events/859bc65a91524856a24f6dae19f52d4b/

events/importer.py

@@ -1,3 +1,5 @@
+import logging
+
 from datetime import timedelta
 from icalendar import Calendar as ICalendar
 import requests
@@ -8,6 +10,8 @@
 DATE_RESOLUTION = timedelta(1)
 TIME_RESOLUTION = timedelta(0, 0, 1)
 
+logger = logging.getLogger(__name__)
+
 
 class ICSImporter:
     def __init__(self, calendar):
@@ -37,7 +41,7 @@ def import_occurrence(self, event, event_data):
     def import_event(self, event_data):
         uid = event_data['UID']
         title = event_data['SUMMARY']
-        description = event_data['DESCRIPTION']
+        description = event_data.get('DESCRIPTION', '')
         location, _ = EventLocation.objects.get_or_create(
             calendar=self.calendar,
             name=event_data['LOCATION']
@@ -69,4 +73,7 @@ def get_events(self, ical):
     def import_events_from_text(self, ical):
         events = self.get_events(ical)
         for event in events:
-            self.import_event(event)
+            try:
+                self.import_event(event)
+            except Exception as exc:
+                logger.exception(event)