<?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_Adminhtml
 * @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)
 */

/**
 * Adminhtml shopping carts report grid block
 *
 * @category   Mage
 * @package    Mage_Adminhtml
 * @author      Magento Core Team <core@magentocommerce.com>
 */
class Mage_Adminhtml_Block_Report_Grid_Shopcart extends Mage_Adminhtml_Block_Widget_Grid
{
    /**
     * stores current currency code
     */
    protected $_currentCurrencyCode = null;

    /**
     * ids of current stores
     */
    protected $_storeIds            = array();

    /**
     * storeIds setter
     *
     * @param  array $storeIds
     * @return Mage_Adminhtml_Block_Report_Grid_Shopcart_Abstract
     */
    public function setStoreIds($storeIds)
    {
        $this->_storeIds = $storeIds;
        return $this;
    }

    /**
     * Retrieve currency code based on selected store
     *
     * @return string
     */
    public function getCurrentCurrencyCode()
    {
        if (is_null($this->_currentCurrencyCode)) {
            reset($this->_storeIds);
            $this->_currentCurrencyCode = (count($this->_storeIds) > 0)
                ? Mage::app()->getStore(current($this->_storeIds))->getBaseCurrencyCode()
                : Mage::app()->getStore()->getBaseCurrencyCode();
        }
        return $this->_currentCurrencyCode;
    }

    /**
     * Get currency rate (base to given currency)
     *
     * @param string|Mage_Directory_Model_Currency $currencyCode
     * @return double
     */
    public function getRate($toCurrency)
    {
        return Mage::app()->getStore()->getBaseCurrency()->getRate($toCurrency);
    }
}