CheckChatOwner.php

<?php
 
namespace Bitrix\Im\V2\Controller\Filter;
 
use Bitrix\Im\V2\Chat;
use Bitrix\Main\Engine\ActionFilter\Base;
use Bitrix\Main\Error;
use Bitrix\Main\Event;
use Bitrix\Main\EventResult;
 
class CheckChatOwner extends Base
{
    public function onBeforeAction(Event $event)
    {
        $currentUser = $this->getAction()->getCurrentUser();
        $currentUserId = (int)(isset($currentUser) ? $currentUser->getId() : null);
 
        if ($this->getAction()->getName() === 'setOwner' || $this->getAction()->getName() === 'setowner')
        {
 
            $arguments = $this->getAction()->getArguments();
            $chat = $arguments['chat'];
 
            if (!isset($arguments['ownerId']))
            {
                $this->addError(new Error(
                    'Parameter ownerId is required',
                    Chat\ChatError::WRONG_PARAMETER
                ));
                return new EventResult(EventResult::ERROR, null, null, $this);
            }
 
            if ($chat->getAuthorId() === $currentUserId)
            {
                return null;
            }
 
            $manageSettings = $chat->getManageSettings();
            if ($manageSettings === Chat::MANAGE_RIGHTS_MANAGERS)
            {
                $selfRelation = $chat->getSelfRelation();
                if ($selfRelation->getManager())
                {
                    return null;
                }
            }
        }
 
        $this->addError(new Error(
            Chat\ChatError::ACCESS_DENIED
        ));
        return new EventResult(EventResult::ERROR, null, null, $this);
    }
}