singlerefreshstrategy.php

<?php
 
namespace Bitrix\Sale\Basket;
 
use Bitrix\Main\ArgumentNullException;
use Bitrix\Main\ObjectNotFoundException;
use Bitrix\Sale\BasketBase;
 
class SingleRefreshStrategy extends RefreshStrategy
{
    public function __construct(array $data = null)
    {
        parent::__construct($data);
 
        if (empty($this->data['BASKET_ITEM']) && empty($this->data['BASKET_ITEM_CODE']))
        {
            throw new ArgumentNullException('Parameters "BASKET_ITEM" or "BASKET_ITEM_CODE" should not be empty.');
        }
    }
 
    protected function extractItem(BasketBase $basket)
    {
        $basketItem = null;
 
        if (isset($this->data['BASKET_ITEM']) && $this->data['BASKET_ITEM'] instanceof BasketItem)
        {
            $basketItem = $this->data['BASKET_ITEM'];
        }
        elseif (!empty($this->data['BASKET_ITEM_CODE']))
        {
            $basketItem = $basket->getItemByBasketCode($this->data['BASKET_ITEM_CODE']);
        }
 
        return $basketItem;
    }
 
    protected function getItemToRefresh(BasketBase $basket)
    {
        $basketItem = $this->extractItem($basket);
        if ($basketItem === null)
        {
            throw new ObjectNotFoundException('Entity "BasketItem" not found');
        }
 
        $basketRefreshStart = time();
        $refreshGap = $this->getBasketRefreshGapTime();
 
        $basketItemLastRefresh = $this->getBasketItemRefreshTimestamp($basketItem);
        if ($basketRefreshStart - $basketItemLastRefresh >= $refreshGap)
        {
            return $basketItem;
        }
 
        return null;
    }
 
    protected function getProductData(BasketBase $basket)
    {
        $itemToRefresh = $this->getItemToRefresh($basket);
 
        $items = array();
        if (!empty($itemToRefresh))
        {
            $items[] = $itemToRefresh;
        }
 
        return $this->getProviderResult($basket, $items);
    }
}