<?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_Paypal
 * @copyright   Copyright (c) 2013 Magento Inc. (http://www.magentocommerce.com)
 * @license     http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */

/**
 * Checkout workflow helper
 */
class Mage_Paypal_Helper_Checkout extends Mage_Core_Helper_Abstract
{
    /**
     * Restore last active quote based on checkout session
     *
     * @return bool True if quote restored successfully, false otherwise
     */
    public function restoreQuote()
    {
        $order = $this->_getCheckoutSession()->getLastRealOrder();
        if ($order->getId()) {
            $quote = $this->_getQuote($order->getQuoteId());
            if ($quote->getId()) {
                $quote->setIsActive(1)
                    ->setReservedOrderId(null)
                    ->save();
                $this->_getCheckoutSession()
                    ->replaceQuote($quote)
                    ->unsLastRealOrderId();
                return true;
            }
        }
        return false;
    }

    /**
     * Cancel last placed order with specified comment message
     *
     * @param string $comment Comment appended to order history
     * @return bool True if order cancelled, false otherwise
     */
    public function cancelCurrentOrder($comment)
    {
        $order = $this->_getCheckoutSession()->getLastRealOrder();
        if ($order->getId() && $order->getState() != Mage_Sales_Model_Order::STATE_CANCELED) {
            $order->registerCancellation($comment)->save();
            return true;
        }
        return false;
    }

    /**
     * Return checkout session instance
     *
     * @return Mage_Checkout_Model_Session
     */
    protected function _getCheckoutSession()
    {
        return Mage::getSingleton('checkout/session');
    }

    /**
     * Return sales quote instance for specified ID
     *
     * @param int $quoteId Quote identifier
     * @return Mage_Sales_Model_Quote
     */
    protected function _getQuote($quoteId)
    {
        return Mage::getModel('sales/quote')->load($quoteId);
    }
}
