<?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) 2012 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_Codegenerator extends Varien_Object
    implements Mage_SalesRule_Model_Coupon_CodegeneratorInterface
{
    /**
     * Retrieve generated code
     *
     * @return string
     */
    public function generateCode()
    {
        $alphabet = ($this->getAlphabet() ? $this->getAlphabet() : 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789');
        $lengthMin = ($this->getLengthMin() ? $this->getLengthMin() : 16);
        $lengthMax = ($this->getLengthMax() ? $this->getLengthMax() : 32);
        $length = ($this->getLength() ? $this->getLength() : rand($lengthMin, $lengthMax));
        $result = '';
        $indexMax = strlen($alphabet) - 1;
        for ($i = 0; $i < $length; $i++) {
            $index = rand(0, $indexMax);
            $result .= $alphabet{$index};
        }
        return $result;
    }

    /**
     * Retrieve delimiter
     *
     * @return string
     */
    public function getDelimiter()
    {
        return ($this->getData('delimiter') ? $this->getData('delimiter') : '-');
    }
}