[Bug] (CalDav): Last occurrence date is not calculated properly on recurring events

[SebastianKrupinski]

The last occurrence date is NOT calculated properly on recurring events causing notification emails for changes and cancellation not to be sent.

server/apps/dav/lib/CalDAV/Schedule/IMipPlugin.php

Lines 149 to 154 in 500a9cb

	// don't send out mails for events that already took place
	$lastOccurrence = $this->imipService->getLastOccurrence($iTipMessage->message);
	$currentTime = $this->timeFactory->getTime();
	if ($lastOccurrence < $currentTime) {
	return;
	}

[SebastianKrupinski]

Confirmed.

Tested using a every 2 days event that was recurring for two weeks, then cancelling the event after the second occurrence had passed.

[SebastianKrupinski]

Determined Cause.

The cause is the parseEventForOrganizer function in sabre/vobject/lib/ITip/Broker class that generates the iTip messages.

The function does not include the RRULE parameter as part of the iTipMessage->message->VEVENT that is sent to the scheduler.

Therefore the last occurrence cannot be calculated properly.

Possible fixes...

• remove last occurrence test
• update sabre dav repo

[ChristophWurst]

#47998 is in so this can be resumed

[SebastianKrupinski]

Confirmed fixed with #48583

RRULE is now present when cancelling an event series after the first occurance.