<?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_CatalogSearch
 * @copyright   Copyright (c) 2011 Magento Inc. (http://www.magentocommerce.com)
 * @license     http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */

/**
 * Layered Navigation block for search
 *
 */
class Mage_CatalogSearch_Block_Layer extends Mage_Catalog_Block_Layer_View
{
    /**
     * Internal constructor
     */
    protected function _construct()
    {
        parent::_construct();
        Mage::register('current_layer', $this->getLayer(), true);
    }

    /**
     * Get attribute filter block name
     *
     * @deprecated after 1.4.1.0
     *
     * @return string
     */
    protected function _getAttributeFilterBlockName()
    {
        return 'catalogsearch/layer_filter_attribute';
    }

    /**
     * Initialize blocks names
     */
    protected function _initBlocks()
    {
        parent::_initBlocks();

        $this->_attributeFilterBlockName = 'catalogsearch/layer_filter_attribute';
    }

    /**
     * Get layer object
     *
     * @return Mage_Catalog_Model_Layer
     */
    public function getLayer()
    {
        return Mage::getSingleton('catalogsearch/layer');
    }

    /**
     * Check availability display layer block
     *
     * @return bool
     */
    public function canShowBlock()
    {
        $_isLNAllowedByEngine = Mage::helper('catalogsearch')->getEngine()->isLeyeredNavigationAllowed();
        if (!$_isLNAllowedByEngine) {
            return false;
        }
        $availableResCount = (int) Mage::app()->getStore()
            ->getConfig(Mage_CatalogSearch_Model_Layer::XML_PATH_DISPLAY_LAYER_COUNT);

        if (!$availableResCount
            || ($availableResCount>=$this->getLayer()->getProductCollection()->getSize())) {
            return parent::canShowBlock();
        }
        return false;
    }
}
