elementsku.php

<?php
namespace Bitrix\Iblock\Template\Entity;
 
class ElementSku extends Base
{
    protected $elementFields = null;
    protected $skuIblockId = null;
    protected $skuList = null;
    protected $property = null;
    protected $price = null;
    public function __construct($id)
    {
        parent::__construct($id);
        $this->fieldMap = array(
            "name" => "NAME",
            "previewtext" => "PREVIEW_TEXT",
            "detailtext" => "DETAIL_TEXT",
            "code" => "CODE",
            //not accessible from template engine
            "ID" => "ID",
            "IBLOCK_ID" => "IBLOCK_ID",
            "IBLOCK_SECTION_ID" => "IBLOCK_SECTION_ID",
        );
    }
 
    public function resolve($entity)
    {
        if ($entity === "property")
        {
            if (!$this->property && $this->loadFromDatabase())
            {
                if ($this->skuIblockId && $this->skuList)
                {
                    $this->property = new ElementSkuProperty($this->fields["ID"]);
                    $this->property->setIblockId($this->skuIblockId);
                }
            }
 
            if ($this->property)
                return $this->property;
        }
        elseif ($entity === "price")
        {
            if (!$this->price && $this->loadFromDatabase())
            {
                if ($this->skuIblockId && $this->skuList)
                {
                    $this->price = new ElementSkuPrice($this->fields["ID"]);
                }
            }
 
            if ($this->price)
                return $this->price;
        }
        return parent::resolve($entity);
    }
 
    public function loadFromDatabase()
    {
        if (!isset($this->fields))
        {
            $this->fields = array();
            $select = array_values($this->fieldMap);
 
            $elementList = \Bitrix\Iblock\ElementTable::getList(array(
                "select" => $select,
                "filter" => array("=ID" => $this->id),
            ));
            $this->elementFields = $elementList->fetch();
            if ($this->elementFields)
            {
                $catalog = \CCatalogSKU::getInfoByProductIBlock($this->elementFields["IBLOCK_ID"]);
                if (!empty($catalog))
                {
                    $this->skuIblockId = $catalog["IBLOCK_ID"];
                    $skuList = \CIBlockElement::getList(array(), array(
                        "IBLOCK_ID" => $catalog["IBLOCK_ID"],
                        "=PROPERTY_".$catalog["SKU_PROPERTY_ID"] => $this->id,
                    ), false, false, $select);
                    while ($sku = $skuList->fetch())
                    {
                        $this->skuList[] = $sku;
                        foreach($sku as $fieldName => $fieldValue)
                        {
                            $this->fields[$fieldName][] = $fieldValue;
                        }
                    }
                }
            }
        }
 
        return is_array($this->fields);
    }
}