iblock.php

<?php
namespace Bitrix\Iblock\Template\Entity;
 
class Iblock extends Base
{
    protected $catalog = null;
 
    public function __construct($id)
    {
        parent::__construct($id);
        $this->fieldMap = array(
            "name" => "NAME",
            "previewtext" => "DESCRIPTION",
            "detailtext" => "DESCRIPTION",
            "code" => "CODE",
        );
    }
 
    public function resolve($entity)
    {
        if ($entity === "catalog")
        {
            if (!$this->catalog && $this->loadFromDatabase())
            {
                if (\Bitrix\Main\Loader::includeModule('catalog'))
                    $this->catalog = new ElementCatalog(0);
            }
 
            if ($this->catalog)
                return $this->catalog;
        }
        return parent::resolve($entity);
    }
 
    protected function loadFromDatabase()
    {
        if (!isset($this->fields))
        {
            $elementList = \Bitrix\Iblock\IblockTable::getList(array(
                "select" => array_values($this->fieldMap),
                "filter" => array("=ID" => $this->id),
            ));
            $this->fields = $elementList->fetch();
        }
        return is_array($this->fields);
    }
}