EventAttendeesUpdate::saveRecurrentEvent

protected function saveRecurrentEvent(Event $event, array $fields, array $eventArray)
{
	$entries = [];
	CCalendarEvent::ParseRecursion($entries, $eventArray, [
		'fromLimitTs' => time() - $eventArray['TZ_OFFSET_FROM'],
		'toLimitTs' => $eventArray['DATE_TO_TS_UTC'],
		'instanceCount' => 1,
		'loadLimit' => false,
		'preciseLimits' => true,
		'checkPermission' => false,
		'userId' => $this->getSaveEventUserId($fields, $event),
	]);

	if (!empty($entries))
	{
		$result = CCalendar::SaveEventEx([
			'recursionEditMode' => 'next',
			'currentEventDateFrom' => $entries[0]['DATE_FROM'],
			'overSaving' => true,
			'checkPermission' => false,
			'sendInvitations' => true,
			'arFields' => $fields,
			'userId' => $this->getSaveEventUserId($fields, $event),
		]);

		return $result['recEventId'] ?? $result['id'] ?? null;
	}

	return 0;
}