CBlogPost :: GetBlogUserCommentPerms: Bitrix method

      
<?php 
//  CBlogPost :: GetBlogUserCommentPerms()
//  /dist/bitrix/modules/blog/general/blog_post.php:121

    public static function GetBlogUserCommentPerms($ID, $userID)
    {
        global $APPLICATION;
        $ID = IntVal($ID);
        $userID = IntVal($userID);

        $arAvailPerms = array_keys($GLOBALS["AR_BLOG_PERMS"]);

        $blogModulePermissions = $APPLICATION->GetGroupRight("blog");
        if ($blogModulePermissions >= "W")
            return $arAvailPerms[count($arAvailPerms) - 1];

        if(IntVal($ID) > 0)
        {
            if (!($arPost = CBlogPost::GetByID($ID)))
            {
                return $arAvailPerms[0];
            }
            else
            {
                $arBlog = CBlog::GetByID($arPost["BLOG_ID"]);
                if ($arBlog["ENABLE_COMMENTS"] != "Y")
                {
                    return $arAvailPerms[0];
                }

                if (CBlog::IsBlogOwner($arPost["BLOG_ID"], $userID))
                {
                    return $arAvailPerms[count($arAvailPerms) - 1];
                }
                
                $arUserGroups = CBlogUser::GetUserGroups($userID, $arPost["BLOG_ID"], "Y", BLOG_BY_USER_ID);
                $permGroups = CBlogUser::GetUserPerms($arUserGroups, $arPost["BLOG_ID"], $ID, BLOG_PERMS_COMMENT, BLOG_BY_USER_ID);
                
//                if for user unset option "WRITE TO BLOG", they can only read (even if all user can write), or smaller rights, if group have smaller
                $arBlogUser = CBlogUser::GetByID($userID, BLOG_BY_USER_ID);
                if ($arBlogUser && $arBlogUser["ALLOW_POST"] != "Y")
                {
                    if($permGroups && in_array(BLOG_PERMS_READ, $arAvailPerms))
                        return min(BLOG_PERMS_READ, $permGroups);
                    else
                        return $arAvailPerms[0];
                }

                if ($permGroups)
                    return $permGroups;
            }
        }
        else
        {
            return $arAvailPerms[0];
        }

//        if(IntVal($userID) > 0)
//        {
//            $arBlogUser = CBlogUser::GetByID($userID, BLOG_BY_USER_ID);
//            if ($arBlogUser && $arBlogUser["ALLOW_POST"] != "Y")
//                return $arAvailPerms[0];
//        }

        return $arAvailPerms[0];
    }