taskcomment.php

См. документацию.

<?php
namespace Bitrix\Socialnetwork\Integration\Forum;
 
use Bitrix\Main\Event;
use Bitrix\Main\EventResult;
 
class TaskComment
{
    protected static $viewedCommentsCache = [];
 
    private static function addViewedComment($params = [])
    {
        if (!is_array($params))
        {
            return false;
        }
 
        $taskId = (isset($params['taskId']) ? intval($params['taskId']) : 0);
        $commentId = (isset($params['commentId']) ? intval($params['commentId']) : 0);
        if (
            !$taskId
            || !$commentId
        )
        {
            return false;
        }
 
        if (!isset(self::$viewedCommentsCache[$taskId]))
        {
            self::$viewedCommentsCache[$taskId] = [];
        }
 
        if (in_array($commentId, self::$viewedCommentsCache[$taskId]))
        {
            return true;
        }
 
        self::$viewedCommentsCache[$taskId][] = $commentId;
 
        return true;
    }
 
    public static function getViewedCommentsTasksList()
    {
        return array_keys(self::$viewedCommentsCache);
    }
 
    public static function onViewed(Event $event)
    {
        $result = new EventResult(
            EventResult::UNDEFINED,
            [],
            'socialnetwork'
        );
 
        $taskId = $event->getParameter('taskId');
        $commentId = $event->getParameter('commentId');
 
        if(
            intval($taskId) <= 0
            || intval($commentId) <= 0
        )
        {
            return $result;
        }
 
        self::addViewedComment([
            'taskId' => $taskId,
            'commentId' => $commentId
        ]);
 
        return $result;
    }
}