fix: patch-015 for nc32 upgrade

This patch helps in indentifying that For a recurring event, the invitee knows without a doubt whether the modification pushed by the updated invitation is a one time thing or a modification of all future events.

--- ./apps/dav/lib/CalDAV/Schedule/IMipPlugin.php	2024-03-18 11:18:20

+++ ./apps/dav/lib/CalDAV/Schedule/IMipPlugin-new.php	2024-03-11 11:18:22

@@ -149,7 +149,30 @@

 		/** @var VEvent $oldVevent */

--- ./apps/dav/lib/CalDAV/Schedule/IMipPlugin.php	2026-03-23 17:46:37.629006189 +0600

+++ ./apps/dav/lib/CalDAV/Schedule/IMipPlugin-new.php	2026-03-24 09:30:02.299251689 +0600

@@ -148,6 +148,30 @@

 		$oldVevent = !empty($modified['old']) && is_array($modified['old']) ? array_pop($modified['old']) : null;

 		$isModified = isset($oldVevent);

+		$recurrenceId = $vEvent->{'RECURRENCE-ID'};

+		if (isset($recurrenceId) && $modified['sentOld'] === 1 && !empty($oldVevent)) {

+			$dateTime = $recurrenceId->getValue();

+			$recurrenceArray = explode('T', $dateTime);

+

+			$oldVEventStart = $oldVevent->DTSTART;

+			$oldStartDateTime = $oldVEventStart->getValue();

+			$startDateTimeArray = explode('T', $oldStartDateTime);

 		// No changed events after all - this shouldn't happen if there is significant change yet here we are

 		// The scheduling status is debatable

 		if (empty($vEvent)) {

@@ -217,12 +240,35 @@

@@ -215,12 +239,36 @@

 		$data['invitee_name'] = ($senderName ?: $sender);

 		$fromEMail = Util::getDefaultEmailAddress('invitations-noreply');

+		if ($method !== self::METHOD_CANCEL && $method !== self::METHOD_REPLY && count($vEvent) > 1) {

+			$template->addHeadingBanner('#EFFFDB', '#293618', $l10n->t('This recurring event has been updated, please review the information below:'));

+		}

+

+		$sequence = $vEvent->SEQUENCE ? $vEvent->SEQUENCE->getValue() : NULL;

+		if (($sequence && $method !== self::METHOD_CANCEL && $method !== self::METHOD_REPLY && ($sequence > 2)) || isset($vEvent->{'RECURRENCE-ID'})) {

+			$template->addHeadingBanner('#EFFFDB', '#293618', $l10n->t('This event has been updated, please review the information below:'));

 		$this->imipService->addBulletList($template, $vEvent, $data);

 		// Only add response buttons to invitation requests: Fix Issue #11230

@@ -255,7 +301,6 @@

@@ -253,7 +301,6 @@

 				|| in_array(strtolower($recipientDomain), $invitationLinkRecipients)) {

 				$token = $this->imipService->createInvitationToken($iTipMessage, $vEvent, $lastOccurrence);

 				$this->imipService->addResponseButtons($template, $token);

 	public function getReplyingAttendee(Message $iTipMessage): ?Property {

--- ./apps/dav/lib/CalDAV/EventComparisonService.php	2024-05-06 12:46:29

+++ ./apps/dav/lib/CalDAV/EventComparisonService-new.php	2024-05-06 12:47:11

--- ./apps/dav/lib/CalDAV/EventComparisonService.php	2026-03-13 18:50:32.749819154 +0600

+++ ./apps/dav/lib/CalDAV/EventComparisonService-new.php	2026-03-24 09:38:05.198934270 +0600

@@ -78,8 +78,9 @@

 			}

 		}