ignore RRULESET if empty in item

CHANGELOG.md

@@ -3,6 +3,7 @@
 ## 3.3.2.dev
 * Fix: debug logging in rights/from_file
 * Add: option [storage] use_cache_subfolder_for_item for storing item cache outside collection-root
+* Fix: ignore empty RRULESET in item
 
 ## 3.3.1
 

radicale/item/filter.py

@@ -2,7 +2,8 @@
 # Copyright © 2008 Nicolas Kandel
 # Copyright © 2008 Pascal Halter
 # Copyright © 2008-2015 Guillaume Ayoub
-# Copyright © 2017-2018 Unrud <[email protected]>
+# Copyright © 2017-2021 Unrud <[email protected]>
+# Copyright © 2024-2024 Peter Bieringer <[email protected]>
 #
 # This library is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -273,8 +274,11 @@ def get_children(components: Iterable[vobject.base.Component]) -> Iterator[
             if hasattr(comp, "recurrence_id") and comp.recurrence_id.value:
                 recurrences.append(comp.recurrence_id.value)
                 if comp.rruleset:
-                    # Prevent possible infinite loop
-                    raise ValueError("Overwritten recurrence with RRULESET")
+                    if comp.rruleset._len is None:
+                        logger.warning("Ignore empty RRULESET in item at RECURRENCE-ID with value '%s' and UID '%s'", comp.recurrence_id.value, comp.uid.value)
+                    else:
+                        # Prevent possible infinite loop
+                        raise ValueError("Overwritten recurrence with RRULESET")
                 rec_main = comp
                 yield comp, True, []
             else:

radicale/tests/static/event_exdate_without_rrule.ics

@@ -0,0 +1,55 @@
+BEGIN:VCALENDAR
+VERSION:2.0
+PRODID:DAVx5/4.4.3.2-ose ical4j/3.2.19
+BEGIN:VEVENT
+DTSTAMP:20241125T195941Z
+UID:9fb6578a-07a6-4c61-8406-69229713d40e
+SEQUENCE:3
+SUMMARY:Escalade
+DTSTART;TZID=Europe/Paris:20240606T193000
+DTEND;TZID=Europe/Paris:20240606T203000
+RRULE:FREQ=WEEKLY;WKST=MO;BYDAY=TH
+EXDATE;TZID=Europe/Paris:20240704T193000
+CLASS:PUBLIC
+STATUS:CONFIRMED
+BEGIN:VALARM
+TRIGGER:-P1D
+ACTION:DISPLAY
+DESCRIPTION:Escalade
+END:VALARM
+END:VEVENT
+BEGIN:VEVENT
+DTSTAMP:20241125T195941Z
+UID:9fb6578a-07a6-4c61-8406-69229713d40e
+RECURRENCE-ID;TZID=Europe/Paris:20241128T193000
+SEQUENCE:1
+SUMMARY:Escalade avec Romain
+DTSTART;TZID=Europe/Paris:20241128T193000
+DTEND;TZID=Europe/Paris:20241128T203000
+EXDATE;TZID=Europe/Paris:20240704T193000
+CLASS:PUBLIC
+STATUS:CONFIRMED
+BEGIN:VALARM
+TRIGGER:-P1D
+ACTION:DISPLAY
+DESCRIPTION:Escalade avec Romain
+END:VALARM
+END:VEVENT
+BEGIN:VTIMEZONE
+TZID:Europe/Paris
+BEGIN:STANDARD
+TZNAME:CET
+TZOFFSETFROM:+0200
+TZOFFSETTO:+0100
+DTSTART:19961027T030000
+RRULE:FREQ=YEARLY;BYMONTH=10;BYDAY=-1SU
+END:STANDARD
+BEGIN:DAYLIGHT
+TZNAME:CEST
+TZOFFSETFROM:+0100
+TZOFFSETTO:+0200
+DTSTART:19810329T020000
+RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=-1SU
+END:DAYLIGHT
+END:VTIMEZONE
+END:VCALENDAR

radicale/tests/test_base.py

@@ -1,6 +1,7 @@
 # This file is part of Radicale - CalDAV and CardDAV server
 # Copyright © 2012-2017 Guillaume Ayoub
-# Copyright © 2017-2019 Unrud <[email protected]>
+# Copyright © 2017-2022 Unrud <[email protected]>
+# Copyright © 2024-2024 Peter Bieringer <[email protected]>
 #
 # This library is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -166,6 +167,12 @@ def test_add_event_with_mixed_datetime_and_date(self) -> None:
         event = get_file_content("event_mixed_datetime_and_date.ics")
         self.put("/calendar.ics/event.ics", event)
 
+    def test_add_event_with_exdate_without_rrule(self) -> None:
+        """Test event with EXDATE but not having RRULE."""
+        self.mkcalendar("/calendar.ics/")
+        event = get_file_content("event_exdate_without_rrule.ics")
+        self.put("/calendar.ics/event.ics", event)
+
     def test_add_todo(self) -> None:
         """Add a todo."""
         self.mkcalendar("/calendar.ics/")