<?php

class App_Sitemap_Virtual
{
    public static function _prepareVirtual(&$sitemap)
    {
        foreach ($sitemap as &$page) {
            $page['source'] = 'virtual';
            if (!isset($page['alias']) && isset($page['fullAlias'])) {
                $page['alias'] = basename($page['fullAlias']);
            }
            if (isset($page['sub'])) {
                self::_prepareVirtual($page['sub']);
            }
            if (isset($page['rightSub'])) {
                self::_prepareVirtual($page['rightSub']);
            }
        }
    }

    public static function prepare(&$sitemap)
    {
        $config = Zend_Registry::get('config');
        if (!isset($config->app) || !isset($config->app->virtualSitemap)) {
            return false;
        }
        $virtualSitemap = $config->app->virtualSitemap->toArray();
        self::_prepareVirtual($virtualSitemap);
        foreach ($virtualSitemap as $item) {
            self::_prepareItem($sitemap, $item);
        }
        self::_callDynamicHandlers($sitemap);
    }

    public static function _prepareItem(&$sitemap, &$item)
    {
        if (!isset($item['pageQuery'])) {
            $sitemap [] = $item;
            return true;
        }
        if (false === ($pages = call_user_func_array('Qs_SiteMap::find', $item['pageQuery']))) {
            return true;
        }
        foreach ($pages as $page) {
            $name = self::_alias2PageSub($page['fullAlias']);
            if (isset($item['sub'])) {
                foreach ($item['sub'] as $subData) {
                    if (isset($subData['targetPageQuery'])) {
                        if (false !== ($targetPage = call_user_func_array('Qs_SiteMap::findFirst', $subData['targetPageQuery']))) {
                            foreach (array('menuTitle', 'fullAlias', 'url', 'source') as $field) {
                                if (array_key_exists($field, $targetPage) && !array_key_exists($field, $subData)) {
                                    $subData[$field] = $targetPage[$field];
                                }
                            }
                        }
                        unset($subData['targetPageQuery']);
                    }
                    Qs_Array::set($sitemap, $name . '[' . $subData['fullAlias'] . ']', $subData);
                }
            }
            $name = self::_alias2PageRightSub($page['fullAlias']);
            if (isset($item['rightSub'])) {
                foreach ($item['rightSub'] as $subData) {
                    Qs_Array::set($sitemap, $name . '[' . $subData['fullAlias'] . ']', $subData);
                }
            }
            if (isset($item['dynamicHandler'])) {
                $name = self::_alias2Page($page['fullAlias']);
                Qs_Array::set($sitemap, $name . '[dynamicHandler]', $item['dynamicHandler']);
            }
        }
    }

    protected function _callDynamicHandlers(&$sitemap)
    {
        foreach ($sitemap as &$item) {
            if (isset($item['dynamicHandler'])) {
                $class = array_shift($item['dynamicHandler']);
                $method = array_shift($item['dynamicHandler']);
                $arguments = array_merge(array($item), $item['dynamicHandler']);
                $obj = new $class();
                $obj->$method($item);
                unset($class);
            }
            if (isset($item['sub'])) {
                self::_callDynamicHandlers($item['sub']);
            }
        }
    }

    protected function _alias2PageRightSub($alias)
    {
        $parts = explode('/', $alias);
        $name = array_shift($parts);
        while (($alias = array_shift($parts))) {
            $name .= '[sub][' . $alias . ']';
        }
        return $name . '[rightSub]';
    }

    protected function _alias2Page($alias)
    {
        $parts = explode('/', $alias);
        $name = array_shift($parts);
        while (($alias = array_shift($parts))) {
            $name .= '[sub][' . $alias . ']';
        }
        return $name;
    }

    protected function _alias2PageSub($alias)
    {
        $parts = explode('/', $alias);
        $name = array_shift($parts);
        while (($alias = array_shift($parts))) {
            $name .= '[sub][' . $alias . ']';
        }
        return $name . '[sub]';
    }
}