<?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) 2010 Magento Inc. (http://www.magentocommerce.com)
 * @license     http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */

/**
 * Category chooser for Wysiwyg CMS widget
 *
 * @category   Mage
 * @package    Mage_Adminhtml
 * @author     Magento Core Team <core@magentocommerce.com>
 */
class Mage_Adminhtml_Block_Catalog_Category_Widget_Chooser extends Mage_Adminhtml_Block_Catalog_Category_Tree
{
    protected $_selectedCategories = array();

    /**
     * Block construction
     * Defines tree template and init tree params
     */
    public function __construct()
    {
        parent::__construct();
        $this->setTemplate('catalog/category/widget/tree.phtml');
        $this->_withProductCount = false;
    }

    /**
     * Setter
     *
     * @param array $selectedCategories
     * @return Mage_Adminhtml_Block_Catalog_Category_Widget_Chooser
     */
    public function setSelectedCategories($selectedCategories)
    {
        $this->_selectedCategories = $selectedCategories;
        return $this;
    }

    /**
     * Getter
     *
     * @return array
     */
    public function getSelectedCategories()
    {
        return $this->_selectedCategories;
    }

    /**
     * Prepare chooser element HTML
     *
     * @param Varien_Data_Form_Element_Abstract $element Form Element
     * @return Varien_Data_Form_Element_Abstract
     */
    public function prepareElementHtml(Varien_Data_Form_Element_Abstract $element)
    {
        $uniqId = Mage::helper('core')->uniqHash($element->getId());
        $sourceUrl = $this->getUrl('*/catalog_category_widget/chooser', array('uniq_id' => $uniqId, 'use_massaction' => false));

        $chooser = $this->getLayout()->createBlock('widget/adminhtml_widget_chooser')
            ->setElement($element)
            ->setTranslationHelper($this->getTranslationHelper())
            ->setConfig($this->getConfig())
            ->setFieldsetId($this->getFieldsetId())
            ->setSourceUrl($sourceUrl)
            ->setUniqId($uniqId);

        if ($element->getValue()) {
            $value = explode('/', $element->getValue());
            $categoryId = isset($value[1]) ? $value[1] : false;
            if ($categoryId) {
                $label = Mage::getSingleton('catalog/category')->load($categoryId)->getName();
                $chooser->setLabel($label);
            }
        }

        $element->setData('after_element_html', $chooser->toHtml());
        return $element;
    }

    /**
     * Category Tree node onClick listener js function
     *
     * @return string
     */
    public function getNodeClickListener()
    {
        if ($this->getData('node_click_listener')) {
            return $this->getData('node_click_listener');
        }
        if ($this->getUseMassaction()) {
            $js = '
                function (node, e) {
                    if (node.ui.toggleCheck) {
                        node.ui.toggleCheck(true);
                    }
                }
            ';
        } else {
            $chooserJsObject = $this->getId();
            $js = '
                function (node, e) {
                    '.$chooserJsObject.'.setElementValue("category/" + node.attributes.id);
                    '.$chooserJsObject.'.setElementLabel(node.text);
                    '.$chooserJsObject.'.close();
                }
            ';
        }
        return $js;
    }

    /**
     * Get JSON of a tree node or an associative array
     *
     * @param Varien_Data_Tree_Node|array $node
     * @param int $level
     * @return string
     */
    protected function _getNodeJson($node, $level = 0)
    {
        $item = parent::_getNodeJson($node, $level);
        if (in_array($node->getId(), $this->getSelectedCategories())) {
            $item['checked'] = true;
        }
        $item['is_anchor'] = (int)$node->getIsAnchor();
        $item['url_key'] = $node->getData('url_key');
        return $item;
    }

    /**
     * Adds some extra params to categories collection
     *
     * @return Mage_Catalog_Model_Resource_Eav_Mysql4_Category_Collection
     */
    public function getCategoryCollection()
    {
        return parent::getCategoryCollection()->addAttributeToSelect('url_key')->addAttributeToSelect('is_anchor');
    }

    /**
     * Tree JSON source URL
     *
     * @return string
     */
    public function getLoadTreeUrl($expanded=null)
    {
        return $this->getUrl('*/catalog_category_widget/categoriesJson', array(
            '_current'=>true,
            'uniq_id' => $this->getId(),
            'use_massaction' => $this->getUseMassaction()
        ));
    }
}