Chat::getSelectorEntityType

static function getSelectorEntityType(array $chat): string
{
	$entityType = $chat['ENTITY_TYPE'];
	if ($entityType !== '' && $entityType !== null)
	{
		return $entityType;
	}

	$type = $chat['TYPE'];
	switch ($type)
	{
		case BitrixImChat::TYPE_GROUP:
			return 'GROUP';

		case BitrixImChat::TYPE_OPEN:
			return 'CHANNEL';
	}

	return '';
}