<?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)
 */


/**
 * Flat sales order grid collection
 *
 * @category    Mage
 * @package     Mage_Sales
 * @author      Magento Core Team <core@magentocommerce.com>
 */
class Mage_Sales_Model_Resource_Order_Grid_Collection extends Mage_Sales_Model_Resource_Order_Collection
{
    /**
     * Event prefix
     *
     * @var string
     */
    protected $_eventPrefix    = 'sales_order_grid_collection';

    /**
     * Event object
     *
     * @var string
     */
    protected $_eventObject    = 'order_grid_collection';

    /**
     * Customer mode flag
     *
     * @var bool
     */
    protected $_customerModeFlag = false;

    /**
     * Model initialization
     *
     */
    protected function _construct()
    {
        parent::_construct();
        $this->setMainTable('sales/order_grid');
    }

    /**
     * Get SQL for get record count
     *
     * @return Varien_Db_Select
     */
    public function getSelectCountSql()
    {
        if ($this->getIsCustomerMode()) {
            $this->_renderFilters();

            $unionSelect = clone $this->getSelect();

            $unionSelect->reset(Zend_Db_Select::ORDER);
            $unionSelect->reset(Zend_Db_Select::LIMIT_COUNT);
            $unionSelect->reset(Zend_Db_Select::LIMIT_OFFSET);

            $countSelect = clone $this->getSelect();
            $countSelect->reset();
            $countSelect->from(array('a' => $unionSelect), 'COUNT(*)');
        } else {
            $countSelect = parent::getSelectCountSql();
        }

        return $countSelect;
    }

    /**
     * Set customer mode flag value
     *
     * @param bool $value
     * @return Mage_Sales_Model_Resource_Order_Grid_Collection
     */
    public function setIsCustomerMode($value)
    {
        $this->_customerModeFlag = (bool)$value;
        return $this;
    }

    /**
     * Get customer mode flag value
     *
     * @return bool
     */
    public function getIsCustomerMode()
    {
        return $this->_customerModeFlag;
    }
}