<?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)
 */

/**
 * Grid colum filter block
 *
 * @category   Mage
 * @package    Mage_Adminhtml
 * @author      Magento Core Team <core@magentocommerce.com>
 */
class Mage_Adminhtml_Block_Widget_Grid_Column_Filter_Abstract extends Mage_Adminhtml_Block_Abstract
    implements Mage_Adminhtml_Block_Widget_Grid_Column_Filter_Interface
{

    /**
     * Column related to filter
     *
     * @var Mage_Adminhtml_Block_Widget_Grid_Column
     */
    protected $_column;

    /**
     * Set column related to filter
     *
     * @param Mage_Adminhtml_Block_Widget_Grid_Column $column
     * @return Mage_Adminhtml_Block_Widget_Grid_Column_Filter_Abstract
     */
    public function setColumn($column)
    {
        $this->_column = $column;
        return $this;
    }

    /**
     * Retrieve column related to filter
     *
     * @return Mage_Adminhtml_Block_Widget_Grid_Column
     */
    public function getColumn()
    {
        return $this->_column;
    }

    /**
     * Retrieve html name of filter
     *
     * @return string
     */
    protected function _getHtmlName()
    {
        return $this->getColumn()->getId();
    }

    /**
     * Retrieve html id of filter
     *
     * @return string
     */
    protected function _getHtmlId()
    {
        return $this->getColumn()->getGrid()->getId() . '_'
            . $this->getColumn()->getGrid()->getVarNameFilter() . '_'
            . $this->getColumn()->getId();
    }

    /**
     * Retrieve escaped value
     *
     * @param mixed $index
     * @return string
     */
    public function getEscapedValue($index = null)
    {
        return htmlspecialchars($this->getValue($index));
    }

    /**
     * Retrieve condition
     *
     * @return array
     */
    public function getCondition()
    {
        $helper = Mage::getResourceHelper('core');
        $likeExpression = $helper->addLikeEscape($this->getValue(), array('position' => 'any'));
        return array('like' => $likeExpression);
    }

    /**
     * @deprecated after 1.5.0.0
     * @param  $value
     * @return mixed
     */
    protected function _escapeValue($value)
    {
        return str_replace('_', '\_', str_replace('\\', '\\\\', $value));
    }

    /**
     * Retrieve filter html
     *
     * @return string
     */
    public function getHtml()
    {
        return '';
    }

}
