offer.php

См. документацию.

<?php
 
namespace Bitrix\Catalog\Controller\Product;
 
use Bitrix\Catalog\Controller\ErrorCode;
use Bitrix\Catalog\ProductTable;
use Bitrix\Main\Error;
use Bitrix\Main\Result;
 
final class Offer extends Base
{
    protected const TYPE = ProductTable::TYPE_OFFER;
 
    private static array $parentProductCache = [];
 
    protected function getAllowedProductTypes(): array
    {
        return [
            ProductTable::TYPE_OFFER,
            ProductTable::TYPE_FREE_OFFER,
        ];
    }
 
    protected function prepareFieldsForAdd(array $fields): ?array
    {
        $fields = parent::prepareFieldsForAdd($fields);
        if ($fields === null)
        {
            return null;
        }
 
        $iblockId = (int)($fields['IBLOCK_ID'] ?? 0);
        if ($iblockId <= 0)
        {
            return null;
        }

        $view = $this->getViewManager()->getView($this);
 
        $result = $view->getCatalogDescription($iblockId);
        if (!$result->isSuccess())
        {
            $this->addErrors($result->getErrors());
 
            return null;
        }
 
        $catalog = $result->getData();
        unset($result);
 
        $skuPropertyId = 'PROPERTY_' . $catalog['SKU_PROPERTY_ID'];
 
        $result = $this->prepareParentId($fields[$skuPropertyId] ?? null, $catalog['PRODUCT_IBLOCK_ID']);
        if (!$result->isSuccess())
        {
            $this->addErrors($result->getErrors());
 
            return null;
        }
 
        $parentId = ($result->getData()['PARENT_ID']) ?? null;
        $fields[$skuPropertyId] = $parentId;
        if ($fields[$skuPropertyId] === null)
        {
            unset($fields[$skuPropertyId]);
        }
        $fields['TYPE'] = $parentId ? ProductTable::TYPE_OFFER : ProductTable::TYPE_FREE_OFFER;
 
        return $fields;
    }
 
    protected function getParentProduct(int $id): ?array
    {
        if (isset(self::$parentProductCache[$id]))
        {
            return self::$parentProductCache[$id] !== false ? self::$parentProductCache[$id] : null;
        }
 
        self::$parentProductCache[$id] = false;
        $result = Producttable::getRow([
            'select' => [
                'ID',
                'TYPE',
                'IBLOCK_ID' => 'IBLOCK_ELEMENT.IBLOCK_ID',
            ],
            'filter' => [
                '=ID' => $id,
            ]
        ]);
        if ($result === null)
        {
            return null;
        }
 
        $result['ID'] = (int)$result['ID'];
        $result['TYPE'] = (int)$result['TYPE'];
        $result['IBLOCK_ID'] = (int)$result['IBLOCK_ID'];
 
        self::$parentProductCache[$id] = $result;
 
        return $result;
    }
 
    protected function prepareParentId(mixed $parentId, int $iblockId): Result
    {
        $emptyParent = ['PARENT_ID' => null];
        $result = new Result();
 
        if ($parentId === null)
        {
            $result->setData($emptyParent);
 
            return $result;
        }
 
        $parentId =
            is_array($parentId) && isset($parentId['VALUE'])
                ? (int)$parentId['VALUE']
                : (int)$parentId
        ;
        if ($parentId <= 0)
        {
            $result->setData($emptyParent);
 
            return $result;
        }
 
        $row = $this->getParentProduct($parentId);
        if ($row === null)
        {
            $result->addError(new Error(
                'Parent product not found.',
                ErrorCode::PRODUCT_OFFER_PARENT_NOT_FOUND
            ));
 
            return $result;
        }
 
        if (
            $row['TYPE'] !== ProductTable::TYPE_PRODUCT
            && $row['TYPE'] !== ProductTable::TYPE_SKU
            && $row['TYPE'] !== ProductTable::TYPE_EMPTY_SKU
        )
        {
            $result->addError(new Error(
                'Invalid parent product type.',
                ErrorCode::PRODUCT_OFFER_BAD_PARENT_TYPE
            ));
 
            return $result;
        }
 
        if ($row['IBLOCK_ID'] !== $iblockId)
        {
            $result->addError(new Error(
                'Invalid information block of the parent product.',
                ErrorCode::PRODUCT_OFFER_BAD_PARENT_IBLOCK_ID
            ));
 
            return $result;
        }
 
        $result->setData(['PARENT_ID' => $row['ID']]);
 
        return $result;
    }
}