Calendar::updateCalendarChatParticipants

static function updateCalendarChatParticipants($eventId, $entryFields, $currentEventAttendeeList): void
{
	if (
		$entryFields['ID'] !== $entryFields['PARENT_ID']
		|| !isset($entryFields['ATTENDEES'])
	)
	{
		return;
	}

	if (!Loader::includeModule('im'))
	{
		return;
	}

	$meetingData = unserialize($entryFields['MEETING'], ['allowed_classes' => false]);

	if (isset($meetingData['CHAT_ID']))
	{
		$chatId = $meetingData['CHAT_ID'];
	}
	else
	{
		return;
	}

	$currentUsers = [];

	if (is_array($currentEventAttendeeList) && !empty($currentEventAttendeeList))
	{
		foreach ($currentEventAttendeeList as $key => $data)
		{
			$currentUsers[] = $data['id'];
		}
	}

	$addedUsers = array_diff($entryFields['ATTENDEES'], $currentUsers);
	$deletedUsers = array_diff($currentUsers, $entryFields['ATTENDEES']);

	if (empty($addedUsers) && empty($deletedUsers))
	{
		return;
	}

	Secretary::updateChatUsers($chatId, $addedUsers, $deletedUsers);
}