<?php
/**
 * Datasource Sitemap: Menu
 *
 * $Id$
 *
 * @author gERD Schaufelberger <gerd@php-tools.net>
 * @license PHP License
 * @package WB
 * @subpackage datasource
 */

WBClass::load('WBDatasource_Sitemap'
        );

/**
 * Datasource Sitemap Menu
 *
 * Add menu items to sitemap
 *
 * @version 0.1.0
 * @package WB
 * @subpackage datasource
 */
class WBDatasource_Sitemap_Menu extends WBDatasource_Sitemap
{
    /**
     * Tree menu
     * @var WBDatasource_TreeMenu
     */
    private $treeMenu;

    /**
     * Default configuration
     *
     * @var array
     */
    protected $config   =   array(
                                'root'      =>  1,
                                'treemenu'  =>  '',
                                'priority'  =>  1.1,
                                'maxlevel'  =>  -1
                        );

    /**
     * pages found so far
     * @var array
     */
    private $pages  =   array(
                            '[[SERVICE_HTML]]'  =>  true
                    );


    /**
     * Find all the URLs
     *
     * Get recent blog posts
     */
    public function find()
    {
        $this->init();

        $url    =   $this->treeMenu->getUrlId('');
        $base   =   $this->treeMenu->getMenuCurrent($url);

        $this->addItem($base);
        $this->listChildren($base);
    }

    /**
     * Add menu item to sitemap
     *
     * Verify item and add to sitemap
     *
     * @param array $item
     * @param int $level
     */
    private function addItem($item, $level = 1)
    {
        $urlid  =   $this->treeMenu->getUrlId($item['url']);
        if (empty($urlid)) {
            return;
        }
        $path   =   $item['url'];
        if (0 != strncmp('[[SERVICE_HTML]]', $path, 16)) {
            return;
        }
        if (isset($this->pages[$urlid])) {
            return;
        }
        $this->pages[$urlid]    =   true;

        // check permissions: requiregroup
        if (!empty($item['requiregroup'])) {
            return;
        }
        // check permissions: requireuser
        if ('user' == $item['requireuser']) {
            return;
        }

        $prio   =   $this->config['priority'] - ($level * 0.1);
        $path   =   substr($path, 16);

        $this->setPath($path);
        $this->setPriority(min(1.0, $prio));
        $this->notify();
    }

    /**
     * List children of menu item
     *
     * Recursive function to dig into nested menues
     *
     * @param array $item
     * @param int $level
     */
    private function listChildren($item, $level = 1)
    {
        // reached max level?
        if (0 < $this->config['maxlevel'] && $level > $this->config['maxlevel']) {
            return;
        }

        $children   =   $this->treeMenu->getMenuChildren($item);
        foreach ($children as $child) {
            if (empty($child['url'])) {
                continue;
            }

            $this->addItem($child, $level + 1);
            $this->listChildren($child, $level + 1);
        }
    }

    /**
     * Start menu and setup config
     */
    private function init()
    {
        $this->config['priority']   =   floatval($this->config['priority']);
        $this->config['maxlevel']   =   intval($this->config['maxlevel']);

        $treeMenu   =   'WBDatasource_TreeMenu';
        if (!empty($this->config['treemenu'])) {
            $treeMenu   .=  '_' . $this->config['treemenu'];
        }
        $this->treeMenu =   WBClass::create($treeMenu);
        $this->treeMenu->setRoot($this->config['root']);
    }

}