CheckChatCanPost.php

<?php
 
namespace Bitrix\Im\V2\Controller\Filter;
 
use Bitrix\Im\V2\Chat;
use Bitrix\Im\V2\Chat\ChatError;
use Bitrix\Main\Engine\ActionFilter\Base;
use Bitrix\Main\Engine\Response\Converter;
use Bitrix\Main\Event;
use Bitrix\Main\EventResult;
 
class CheckChatCanPost extends Base
{
    public function onBeforeAction(Event $event)
    {
        $arguments = $this->getAction()->getArguments();
        $arguments['rightsLevel'] = (new Converter(Converter::TO_UPPER))->process($arguments['rightsLevel'] ?? '');
        $this->getAction()->setArguments($arguments);
        if (in_array(
            $arguments['rightsLevel'],
            [Chat::MANAGE_RIGHTS_NONE, Chat::MANAGE_RIGHTS_MEMBER, Chat::MANAGE_RIGHTS_MANAGERS, Chat::MANAGE_RIGHTS_OWNER],
            true
        ))
        {
            return null;
        }
 
        $this->addError(new ChatError(
            ChatError::WRONG_PARAMETER
        ));
        return new EventResult(EventResult::ERROR, null, null, $this);
    }
}