ExtendPullWatchPrefilter.php

См. документацию.

<?php
 
namespace Bitrix\Im\V2\Controller\Filter;
 
use Bitrix\Im\V2\Chat\OpenChat;
use Bitrix\Im\V2\Chat\OpenLineChat;
use Bitrix\Im\V2\Chat\PrivateChat;
use Bitrix\Im\V2\Message;
use Bitrix\Main\Engine\ActionFilter\Base;
use Bitrix\Main\Event;
 
class ExtendPullWatchPrefilter extends Base
{
    public function onBeforeAction(Event $event)
    {
        $chat = $this->getAction()->getArguments()['chat'] ?? null;
 
        if ($chat === null)
        {
            $message = $this->getAction()->getArguments()['message'] ?? null;
            if ($message instanceof Message)
            {
                $chat = $message->getChat();
            }
        }
 
        if ($chat instanceof OpenChat || $chat instanceof OpenLineChat)
        {
            if ($chat->getSelfRelation() === null)
            {
                $chat->extendPullWatch();
            }
        }
 
        return null;
    }
}