refreshstrategy.php

См. документацию.

<?php
 
namespace Bitrix\Sale\Basket;
 
use Bitrix\Sale\BasketItem;
use Bitrix\Sale\BasketItemBase;
use Bitrix\Sale\BundleCollection;
use Bitrix\Sale\Registry;
use Bitrix\Sale\Result;
 
abstract class RefreshStrategy extends BaseRefreshStrategy
{
    protected function applyRefreshResult(BasketItemBase $item, $fields)
    {
        $bundleItemList = array();
        if (isset($fields['ITEMS']))
        {
            $bundleItemList = $fields['ITEMS'];
            unset($fields['ITEMS']);
        }

        if (isset($fields['QUANTITY']))
        {
            $delta = $item->getQuantity() - $item->getNotPurchasedQuantity();
            $fields['QUANTITY'] += max($delta, 0);
        }
 
        $result = parent::applyRefreshResult($item, $fields);
        if ($result->isSuccess())
        {
            if ($bundleItemList)
            {
                $r = $this->applyBundleRefreshResult($item, $bundleItemList);
                if (!$r->isSuccess())
                {
                    $result->addErrors($r->getErrors());
                }
            }
        }
 
        return $result;
    }

    protected function applyBundleRefreshResult(BasketItemBase $item, $bundleItemList)
    {
        $result = new Result();
 
        $registry = Registry::getInstance(Registry::REGISTRY_TYPE_ORDER);
        $basketItemClassName = $registry->getBasketItemClassName();

        $bundleCollection = $item->getBundleCollection();
        $bundleIndexList = array();
        foreach ($bundleCollection as $bundleItem)
        {
            $bundleIndexList[$bundleItem->getBasketCode()] = $bundleItem;
        }

        foreach ($bundleItemList as $bundleBasketItemData)
        {
            if (empty($bundleBasketItemData['MODULE']) || empty($bundleBasketItemData['PRODUCT_ID']))
                return null;
 
            $props = array();
            if (!empty($bundleBasketItemData['PROPS']) && is_array($bundleBasketItemData['PROPS']))
            {
                $props = $bundleBasketItemData['PROPS'];
            }

            $bundleItem = $bundleCollection->getExistsItem($bundleBasketItemData['MODULE'], $bundleBasketItemData['PRODUCT_ID'], $props);
            if (!$bundleItem)
            {
                $bundleItem = $basketItemClassName::create($bundleCollection, $bundleBasketItemData['MODULE'], $bundleBasketItemData['PRODUCT_ID']);
            }
 
            $fields = array_intersect_key($bundleBasketItemData, $basketItemClassName::getSettableFieldsMap());
            $r = $this->applyRefreshResult($item, $fields);
            if (!$r->isSuccess())
            {
                $result->addErrors($r->getErrors());
            }
 
            unset($bundleIndexList[$bundleItem->getBasketCode()]);
        }
 
        if ($bundleIndexList)
        {
            foreach ($bundleIndexList as $bundleItem)
            {
                $bundleItem->delete();
            }
        }
 
        return $result;
    }
}