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<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
namespace Magento\Sales\Model\Order\Creditmemo\Total;

class Subtotal extends AbstractTotal
{
    /**
     * Collect Creditmemo subtotal
     *
     * @param \Magento\Sales\Model\Order\Creditmemo $creditmemo
     * @return $this
     */
    public function collect(\Magento\Sales\Model\Order\Creditmemo $creditmemo)
    {
        $subtotal = 0;
        $baseSubtotal = 0;
        $subtotalInclTax = 0;
        $baseSubtotalInclTax = 0;

        foreach ($creditmemo->getAllItems() as $item) {
            if ($item->getOrderItem()->isDummy()) {
                continue;
            }

            $item->calcRowTotal();

            $subtotal += $item->getRowTotal();
            $baseSubtotal += $item->getBaseRowTotal();
            $subtotalInclTax += $item->getRowTotalInclTax();
            $baseSubtotalInclTax += $item->getBaseRowTotalInclTax();
        }

        $creditmemo->setSubtotal($subtotal);
        $creditmemo->setBaseSubtotal($baseSubtotal);
        $creditmemo->setSubtotalInclTax($subtotalInclTax);
        $creditmemo->setBaseSubtotalInclTax($baseSubtotalInclTax);

        $creditmemo->setGrandTotal($creditmemo->getGrandTotal() + $subtotal);
        $creditmemo->setBaseGrandTotal($creditmemo->getBaseGrandTotal() + $baseSubtotal);
        return $this;
    }
}