entityfactory.php

<?php
 
namespace Bitrix\Im\Call\Integration;
 
use Bitrix\Im\Call\Call;
use Bitrix\Main\ArgumentException;
 
class EntityFactory
{
    public static function createEntity(Call $call, $entityType, $entityId)
    {
        if($entityType === EntityType::CHAT)
        {
            return new Chat($call, $entityId);
        }
 
        throw new ArgumentException("Unknown entity type: " . $entityType);
    }
}