Eccube\Service\CartService::setProductQuantity PHP Метод

    public function setProductQuantity($ProductClass, $quantity)
    {
        if (!$ProductClass instanceof ProductClass) {
            $ProductClass = $this->entityManager->getRepository('Eccube\\Entity\\ProductClass')->find($ProductClass);
            if (!$ProductClass) {
                throw new CartException('cart.product.delete');
            }
        }
        if ($ProductClass->getProduct()->getStatus()->getId() !== Disp::DISPLAY_SHOW) {
            $this->removeProduct($ProductClass->getId());
            throw new CartException('cart.product.not.status');
        }
        $productName = $ProductClass->getProduct()->getName();
        if ($ProductClass->hasClassCategory1()) {
            $productName .= " - " . $ProductClass->getClassCategory1()->getName();
        }
        if ($ProductClass->hasClassCategory2()) {
            $productName .= " - " . $ProductClass->getClassCategory2()->getName();
        }
        // 商品種別に紐づく配送業者を取得
        $deliveries = $this->app['eccube.repository.delivery']->getDeliveries($ProductClass->getProductType());
        if (count($deliveries) == 0) {
            // 商品種別が存在しなければエラー
            $this->removeProduct($ProductClass->getId());
            $this->addError('cart.product.not.producttype', $productName);
            throw new CartException('cart.product.not.producttype');
        }
        $this->setCanAddProductType($ProductClass->getProductType());
        if ($this->BaseInfo->getOptionMultipleShipping() != Constant::ENABLED) {
            if (!$this->canAddProduct($ProductClass->getId())) {
                // 複数配送対応でなければ商品種別が異なればエラー
                throw new CartException('cart.product.type.kind');
            }
        } else {
            // 複数配送の場合、同一支払方法がなければエラー
            if (!$this->canAddProductPayment($ProductClass->getProductType())) {
                throw new CartException('cart.product.payment.kind');
            }
        }
        $tmp_subtotal = 0;
        $tmp_quantity = 0;
        foreach ($this->getCart()->getCartItems() as $cartitem) {
            $pc = $cartitem->getObject();
            if ($pc->getId() != $ProductClass->getId()) {
                // まず、追加された商品以外のtotal priceをセット
                $tmp_subtotal += $cartitem->getTotalPrice();
            }
        }
        for ($i = 0; $i < $quantity; $i++) {
            $tmp_subtotal += $ProductClass->getPrice02IncTax();
            if ($tmp_subtotal > $this->app['config']['max_total_fee']) {
                $this->setError('cart.over.price_limit');
                break;
            }
            $tmp_quantity++;
        }
        $quantity = $tmp_quantity;
        $tmp_quantity = 0;
        /*
         * 実際の在庫は ProductClass::ProductStock だが、購入時にロックがかかるため、
         * ここでは ProductClass::stock で在庫のチェックをする
         */
        if (!$ProductClass->getStockUnlimited() && $quantity > $ProductClass->getStock()) {
            if ($ProductClass->getSaleLimit() && $ProductClass->getStock() > $ProductClass->getSaleLimit()) {
                $tmp_quantity = $ProductClass->getSaleLimit();
                $this->addError('cart.over.sale_limit', $productName);
            } else {
                $tmp_quantity = $ProductClass->getStock();
                $this->addError('cart.over.stock', $productName);
            }
        }
        if ($ProductClass->getSaleLimit() && $quantity > $ProductClass->getSaleLimit()) {
            $tmp_quantity = $ProductClass->getSaleLimit();
            $this->addError('cart.over.sale_limit', $productName);
        }
        if ($tmp_quantity) {
            $quantity = $tmp_quantity;
        }
        $CartItem = new CartItem();
        $CartItem->setClassName('Eccube\\Entity\\ProductClass')->setClassId((string) $ProductClass->getId())->setPrice($ProductClass->getPrice02IncTax())->setQuantity($quantity);
        $this->cart->setCartItem($CartItem);
        return $this;
    }