<?php
/**
 * Magento
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Open Software License (OSL 3.0)
 * that is bundled with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://opensource.org/licenses/osl-3.0.php
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@magentocommerce.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade Magento to newer
 * versions in the future. If you wish to customize Magento for your
 * needs please refer to http://www.magentocommerce.com for more information.
 *
 * @category    Mage
 * @package     Mage_Sales
 * @copyright   Copyright (c) 2012 Magento Inc. (http://www.magentocommerce.com)
 * @license     http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */


/**
 * Quote address attribute frontend discount resource model
 *
 * @category    Mage
 * @package     Mage_Sales
 * @author      Magento Core Team <core@magentocommerce.com>
 */
class Mage_Sales_Model_Resource_Quote_Address_Attribute_Frontend_Discount
    extends Mage_Sales_Model_Resource_Quote_Address_Attribute_Frontend
{
    /**
     * Fetch discount
     *
     * @param Mage_Sales_Model_Quote_Address $address
     * @return Mage_Sales_Model_Resource_Quote_Address_Attribute_Frontend_Discount
     */
    public function fetchTotals(Mage_Sales_Model_Quote_Address $address)
    {
        $amount = $address->getDiscountAmount();
        if ($amount != 0) {
            $title = Mage::helper('sales')->__('Discount');
            $couponCode = $address->getQuote()->getCouponCode();
            if (strlen($couponCode)) {
                $title .= sprintf(' (%s)', $couponCode);
            }
            $address->addTotal(array(
                'code'  => 'discount',
                'title' => $title,
                'value' => -$amount
            ));
        }
        return $this;
    }
}