App\Models\Forum\Authorize::increasesPostsCount PHP Method

    public static function increasesPostsCount($user, $forum)
    {
        return static::aclCheck($user, 'f_postcount', $forum);
    }

 public function refreshForumCache($forum = null, $postsChangeCount = 0)
 {
     if ($forum !== null) {
         if (Forum\Authorize::increasesPostsCount($this, $forum) !== true) {
             $postsChangeCount = 0;
         }
         // In case user_posts is 0 and $postsChangeCount is -1.
         $newPostsCount = DB::raw("GREATEST(CAST(user_posts AS SIGNED) + {$postsChangeCount}, 0)");
     } else {
         $newPostsCount = $this->forumPosts()->whereIn('forum_id', Forum\Authorize::postsCountedForums($this))->count();
     }
     $lastPost = $this->forumPosts()->last()->select('post_time')->first();
     // null time will be stored as 0 by the db. Nothing can be done about
     // it, short of changing the column to allow null.
     $lastPostTime = $lastPost !== null ? $lastPost->post_time : null;
     return $this->update(['user_posts' => $newPostsCount, 'user_lastpost_time' => $lastPostTime]);
 }