CalendarEntryAjax::getUsersToCheck

private function getUsersToCheck(array $attendees): array
{
	$usersToCheck = [];
	foreach ($attendees as $attId)
	{
		if ((int)$attId !== CCalendar::GetUserId())
		{
			$userSettings = UserSettings::get((int)$attId);
			if ($userSettings && $userSettings['denyBusyInvitation'])
			{
				$usersToCheck[] = (int)$attId;
			}
		}
	}
	return $usersToCheck;
}