Due to a bug in Sabre it's necessary for calendar objects to implement
ACLs. Otherwise the scheduling plugin will throw an error when it tries
to fetch the owner of a calendar object that is being deleted.
Ref https://github.com/sabre-io/dav/issues/1345
Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>
The trashbin is one report across all calendars of a user. In order to
refresh the data of a single calendar when one of its events is
restored, we need to know what calendar the event belongs to. There
doesn't seem to be a standard property for a URI, so this adds a custom
Nextcloud prop for the calendar-uri.
Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>
