<?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_SalesRule
 * @copyright   Copyright (c) 2010 Magento Inc. (http://www.magentocommerce.com)
 * @license     http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */


class Mage_SalesRule_Model_Coupon extends Mage_Core_Model_Abstract
{
    /**
     * Coupon's owner rule instance
     *
     * @var Mage_SalesRule_Model_Rule
     */
    protected $_rule;

    protected function _construct()
    {
        parent::_construct();
        $this->_init('salesrule/coupon');
    }

    /**
     * Processing object before save data
     *
     * @return Mage_Core_Model_Abstract
     */
    protected function _beforeSave()
    {
        if (!$this->getRuleId() && $this->_rule instanceof Mage_SalesRule_Model_Rule) {
            $this->setRuleId($this->_rule->getId());
        }
        return parent::_beforeSave();
    }

    /**
     * Set rule instance
     *
     * @param  Mage_SalesRule_Model_Rule
     * @return Mage_SalesRule_Model_Coupon
     */
    public function setRule(Mage_SalesRule_Model_Rule $rule)
    {
        $this->_rule = $rule;
        return $this;
    }

    /**
     * Load primary coupon for specified rule
     *
     * @param Mage_SalesRule_Model_Rule|int Rule
     */
    public function loadPrimaryByRule($rule)
    {
        $this->getResource()->loadPrimaryByRule($this, $rule);
        return $this;
    }
}