chat.php

См. документацию.

<?php
 
namespace Bitrix\Im\Integration\UI\EntitySelector\Helper;
 
class Chat
{
    public static function getSelectorEntityType(array $chat): string
    {
        $entityType = $chat['ENTITY_TYPE'];
        if ($entityType !== '' && $entityType !== null)
        {
            return $entityType;
        }
 
        $type = $chat['TYPE'];
        switch ($type)
        {
            case \Bitrix\Im\Chat::TYPE_GROUP:
                return 'GROUP';
 
            case \Bitrix\Im\Chat::TYPE_OPEN:
                return 'CHANNEL';
        }
 
        return '';
    }
}