<?php

class WPML_CMS_Navigation{
    var $settings;
    private $cache;
      
    function __construct(){        
        add_action('init', array($this, 'init'));        
    } 
    
    function init(){
        global $cms_nav_ie_ver;
        
        $this->plugin_localization();
        
        // Check if WPML is active. If not display warning message and not load CMS Navigation
        if(!defined('ICL_SITEPRESS_VERSION') || ICL_PLUGIN_INACTIVE){
            if ( !function_exists('is_multisite') || !is_multisite() ) {
                add_action('admin_notices', array($this, '_no_wpml_warning'));
            }
            return false;            
        }elseif(version_compare(ICL_SITEPRESS_VERSION, '2.0.5', '<')){
            add_action('admin_notices', array($this, '_old_wpml_warning'));
            return false;            
        }  
        
        // Load plugin settings
        $this->settings = get_option('wpml_cms_nav_settings');
        
        // Use WPML legacy. Read settings from WPML if they exist there.
        if(empty($this->settings) && defined('ICL_SITEPRESS_VERSION')){
            require_once WPML_CMS_NAV_PLUGIN_PATH . '/inc/cms-navigation-schema.php';
            wpml_cms_nav_default_settings();
        }
        
        // Initialize cache
        $this->cache['offsite_url_cache'] = new wpml_cms_nav_cache('cms_nav_offsite_url', true);
        
        // Determing User agent to be used in rendering the menu correctly for IE        
        $cms_nav_user_agent = $_SERVER['HTTP_USER_AGENT'];
        if(preg_match('#MSIE ([0-9]+)\.[0-9]#',$cms_nav_user_agent,$matches)){
            $cms_nav_ie_ver = $matches[1];
        }
        
        // Initialize sidebar navigation wiget
        $this->sidebar_navigation_widget_init();
        
        // Load some resources
        if(is_admin()){
            wp_enqueue_script('wpml-cms-nav-js', WPML_CMS_NAV_PLUGIN_URL . '/res/js/navigation.js', array(), WPML_CMS_NAV_VERSION);    
        }        
        if(!defined('ICL_DONT_LOAD_NAVIGATION_CSS') || !ICL_DONT_LOAD_NAVIGATION_CSS){
            wp_enqueue_style('wpml-cms-nav-css', WPML_CMS_NAV_PLUGIN_URL . '/res/css/navigation.css', array(), WPML_CMS_NAV_VERSION);        
        }
        $this->cms_navigation_css();
        
        // Setup the WP-Admin menus
        add_action('admin_menu', array($this, 'menu'));
        
        // Clear cache hook
        add_action('wp_ajax_wpml_cms_nav_clear_nav_cache', array($this, 'clear_cache'));
        // Save form(options) hook
        add_action('wp_ajax_wpml_cms_nav_save_form', array($this, 'save_form'));
        
        // theme hooks
        add_action('icl_navigation_breadcrumb', array($this, 'cms_navigation_breadcrumb'));
        add_action('icl_navigation_menu', array($this, 'cms_navigation_menu_nav'));
        add_action('icl_navigation_sidebar', array($this, 'cms_navigation_page_navigation'));
        
        // more hooks
        add_action('save_post', array($this, 'cms_navigation_update_post_settings'), 4, 2);
        add_action('admin_head', array($this, 'cms_navigation_page_edit_options'));                
        add_action('admin_head', array($this, 'cms_navigation_js'));
        
        // offsite urls hooks
        add_filter('page_link', array($this, 'rewrite_page_link'), 15, 2);
        add_action('parse_query', array($this, 'redirect_offsite_urls'));
        
        // situations to clear the cache
        add_filter('permalink_structure_changed', array($this,'clear_cache'));
        add_filter('update_option_show_on_front', array($this,'clear_cache')); 
        add_filter('update_option_page_on_front', array($this,'clear_cache')); 
        add_filter('update_option_page_for_posts', array($this,'clear_cache'));         
        add_action('delete_post', array($this, 'clear_cache'));
        add_action('delete_category', array($this, 'clear_cache'));
        add_action('create_category', array($this, 'clear_cache'));
        add_action('edited_category', array($this, 'clear_cache'));            
        
        // add message to WPML dashboard widget
        add_action('icl_dashboard_widget_content', array($this, 'icl_dashboard_widget_content'));
                               
    }
    
    function _no_wpml_warning(){
        ?>
        <div class="message error"><p><?php printf(__('WPML CMS Navigation is enabled but not effective. It requires <a href="%s">WPML</a> in order to work.', 'wpml-cms-nav'), 
            'http://wpml.org/'); ?></p></div>
        <?php
    }
    
    function _old_wpml_warning(){
        ?>
        <div class="message error"><p><?php printf(__('WPML CMS Navigation is enabled but not effective. It is not compatible with  <a href="%s">WPML</a> versions prior 2.0.5.', 'wpml-cms-nav'), 
            'http://wpml.org/'); ?></p></div>
        <?php
    }
    
    
    function get_settings(){
        return $this->settings;
    }
    
    function save_settings(){
        update_option('wpml_cms_nav_settings', $this->settings);            
    }
    
    function menu(){
        $top_page = apply_filters('icl_menu_main_page', basename(ICL_PLUGIN_PATH).'/menu/languages.php');
        add_submenu_page($top_page, 
            __('Navigation','wpml-cms-nav'), __('Navigation','wpml-cms-nav'),
            'manage_options', basename(WPML_CMS_NAV_PLUGIN_PATH).'/menu/navigation.php');            
    }
    
    function save_form(){
        global $wpdb;
        
        if($_POST['icl_cms_nav_nonce'] != wp_create_nonce('icl_cms_nav_nonce')) return false;
        
        $this->settings['page_order'] = $_POST['icl_navigation_page_order'];
        $this->settings['show_cat_menu'] = @intval($_POST['icl_navigation_show_cat_menu']);
        if($_POST['icl_navigation_cat_menu_title']){
            $this->settings['cat_menu_title'] = stripslashes($_POST['icl_navigation_cat_menu_title']);
            if(function_exists('icl_register_string')){
                icl_register_string('WPML', 'Categories Menu', stripslashes($_POST['icl_navigation_cat_menu_title']));    
            }            
        }        
        $this->settings['cat_menu_page_order'] = $_POST['icl_navigation_cat_menu_page_order'];
        $this->settings['cat_menu_contents'] = $_POST['icl_blog_menu_contents'];
        $this->settings['heading_start'] = stripslashes($_POST['icl_navigation_heading_start']);
        $this->settings['heading_end'] = stripslashes($_POST['icl_navigation_heading_end']);

        $this->settings['cache'] = isset($_POST['icl_navigation_caching'])?$_POST['icl_navigation_caching']:0;

        $this->settings['breadcrumbs_separator'] = stripslashes($_POST['icl_breadcrumbs_separator']);
        
        $this->save_settings();
        
        // clear the cms navigation caches
        $this->cache['offsite_url_cache']->clear();
        
        @mysql_query("TRUNCATE {$wpdb->prefix}icl_cms_nav_cache");
        
    }
    
    function clear_cache(){
        global $wpdb;        
        // clear the cache.
        $this->cache['offsite_url_cache']->clear();
        @mysql_query("TRUNCATE {$wpdb->prefix}icl_cms_nav_cache");
        
        return true;
    }
        
    function cms_navigation_breadcrumb(){
        global $post, $current_user, $wpdb, $wp_rewrite;
        global $sitepress, $sitepress_settings;
        
        if(func_num_args()){
            $args = func_get_args();
            $separator = $args[0];
        }
        
        if(!empty($separator) && $separator != $this->settings['breadcrumbs_separator']){
            $this->settings['breadcrumbs_separator'] = $separator;
        }
        
        $output = null;
        $use_cache = isset($this->settings['cache']) && $this->settings['cache'] && !(defined('WPML_CMS_NAV_DISABLE_CACHE') && WPML_CMS_NAV_DISABLE_CACHE);
        
        if ($use_cache) {
            $cache_key = $_SERVER['REQUEST_URI'].'-'.$sitepress->get_current_language();    
            
            $output = $wpdb->get_var($wpdb->prepare("
                                SELECT data
                                FROM {$wpdb->prefix}icl_cms_nav_cache
                                WHERE cache_key=%s
                                AND type='nav_breadcrumb'
                                AND DATE_SUB(NOW(), INTERVAL ".WPML_CMS_NAV_CACHE_EXPIRE.") < timestamp", $cache_key));
        }
        
        if (!$output) {
            
            // save the menu to a cache
            ob_start();
        
            if(0 === strpos('page', get_option('show_on_front'))){
                $page_on_front = (int)get_option('page_on_front'); 
                $page_for_posts  = (int)get_option('page_for_posts');
            }else{
                $page_on_front = 0;
                $page_for_posts  = 0;        
            }
            if(isset($post) && $page_on_front!=$post->ID){ 
                if($page_on_front){                    
                    $permalink = $sitepress->language_url();                        
                    if($sitepress_settings['language_negotiation_type'] != 3){
                        $permalink = trailingslashit($permalink);
                    }                    
                    ?><a href="<?php echo $permalink ; ?>"><?php echo get_the_title($page_on_front) ?></a><?php 
                        echo $this->settings['breadcrumbs_separator'];
                }elseif(!is_home() || (is_home() && !$page_on_front && $page_for_posts)){
                    ?><a href="<?php echo $sitepress->language_url() ?>"><?php _e('Home') ?></a><?php 
                        echo $this->settings['breadcrumbs_separator'];
                }
            }
            
            $post_types = $sitepress->get_translatable_documents(true);    
            
            unset($post_types['post'],$post_types['page']);
            if((($pn = get_query_var('pagename')) || (($pn = get_query_var('post_type')) && !get_query_var('p') && !get_query_var($pn))) && isset($post_types[$pn])){
                
                echo $post_type_name  = $post_types[$pn]->labels->name;
                if(get_query_var('name')){
                    echo $this->settings['breadcrumbs_separator'];                    
                }
                
            }elseif(($post_type = get_query_var('post_type')) && get_query_var($post_type)){
                if (isset($post_types[$post_type]->has_archive)
                            && $post_types[$post_type]->has_archive
                            && function_exists('get_post_type_archive_link')) {
                    echo '<a href="' . get_post_type_archive_link($post_type) . '">'
                        . $post_types[$post_type]->labels->name . '</a> '
                        . $this->settings['breadcrumbs_separator'];
                } else if (isset($post_types[$post_type]->taxonomies)
                        && !empty($post_types[$post_type]->taxonomies)) {
                    foreach ($post_types[$post_type]->taxonomies as $temp_tax) {
                        $terms = wp_get_post_terms($GLOBALS['wp_query']->get_queried_object_id(), $temp_tax);
                        if (!empty($terms)) {
                            $custom_post_tax = $temp_tax;
                            break;
                        }
                    }
                    if (empty($terms)) {
                        echo $post_types[$post_type]->labels->name
                                . $this->settings['breadcrumbs_separator'];
                    } else {
                        $term_parents[] = array('name'=>$terms[0]->name, 'url'=>get_term_link($terms[0], $custom_post_tax));
                        $term_parent = $terms[0]->parent;
                        while($term_parent){
                            $term = get_term($term_parent, $custom_post_tax);
                            $term_parent = $term->parent;
                            $term_parents[] = array('name'=>$term->name, 'url'=>get_term_link((int)$term->term_id, $custom_post_tax));
                        }
                        if(!empty($term_parents)){
                            $term_parents = array_reverse($term_parents);
                            foreach($term_parents as $term){
                                echo '<a href="'.$term['url'].'">'.$term['name'].'</a> ' . $this->settings['breadcrumbs_separator'];
                            };
                        }
                    }
                } else {
                    echo $post_types[$post_type]->labels->name
                            . $this->settings['breadcrumbs_separator'];
                }
            }elseif(!is_page() && !is_home() && !is_tax() && $page_for_posts){
                ?><a href="<?php echo get_permalink($page_for_posts); ?>"><?php echo get_the_title($page_for_posts) ?></a><?php 
                    echo $this->settings['breadcrumbs_separator'];
            }
            
            if(is_home() && $page_for_posts && !isset($post_type_name)){                
                echo get_the_title($page_for_posts);
            }elseif(($post_type = get_query_var('post_type')) && get_query_var($post_type)){                
                the_post();
                echo get_the_title();
                rewind_posts();
            }elseif(is_page() && $page_on_front!=$post->ID){                        
                the_post();
                if(is_array($post->ancestors)){            
                    $ancestors = array_reverse($post->ancestors);
                    foreach($ancestors as $anc){
                        if($page_on_front==$anc) {continue;}
                        ?>
                        <a href="<?php echo get_permalink($anc); ?>"><?php echo get_the_title($anc) ?></a><?php 
                            echo $this->settings['breadcrumbs_separator']; 
                    }            
                }    
                echo get_the_title();
                rewind_posts();
            }elseif(is_single()){                
                the_post();
                $cat = get_the_category();
                $cat = $cat[0]->cat_ID;                
                $parents = get_category_parents($cat, TRUE, $this->settings['breadcrumbs_separator']);
                if(is_string($parents)){
                    echo $parents;
                }
                the_title();   
                rewind_posts();         
            }elseif (is_category()) {                
                $cat = get_term(intval( get_query_var('cat')), 'category', OBJECT, 'display');
                if(!empty($cat->parent)){
                    echo get_category_parents($cat->parent, TRUE, $this->settings['breadcrumbs_separator']);                 
                }
                single_cat_title();
            }elseif(is_tag()){                
                echo __('Articles tagged ', 'wpml-cms-nav') ,'&#8216;'; 
                single_tag_title();
                echo '&#8217;';    
            }elseif (is_tax()){   
                $term = get_term($GLOBALS['wp_query']->get_queried_object_id(), get_query_var('taxonomy'));                
                $term_name = $term->name;
                $term_parent = $term->parent;
                while($term_parent){
                    $term = get_term($term_parent, get_query_var('taxonomy'));                    
                    $term_parent = $term->parent;
                    $term_parents[] = array('name'=>$term->name, 'url'=>get_term_link((int)$term->term_id, get_query_var('taxonomy')));
                }
                if(!empty($term_parents)){
                    $term_parents = array_reverse($term_parents);
                    foreach($term_parents as $term){
                        echo '<a href="'.$term['url'].'">'.$term['name'].'</a> ' . $this->settings['breadcrumbs_separator']; 
                    };
                }
                echo $term_name;
            }elseif (is_month()){                
                echo the_time('F, Y');
            }elseif (is_search()){
                echo __('Search for: ', 'wpml-cms-nav'), strip_tags(get_query_var('s'));
            /*    
            }elseif (is_404()){
                echo __('Not found', 'wpml-cms-nav');
            */
            }        
            $output = ob_get_contents();
            ob_end_clean();
            
            if (!$output){
                $output = ' ';
            }
            
            if ($use_cache) {
                $wpdb->query($wpdb->prepare("DELETE FROM
                             {$wpdb->prefix}icl_cms_nav_cache
                             WHERE cache_key= %s
                             AND type='nav_breadcrumb'", $cache_key));            
                $wpdb->insert($wpdb->prefix.'icl_cms_nav_cache', 
                    array(
                        'cache_key'=>$cache_key, 
                        'type'=>'nav_breadcrumb', 
                        'data'=>$output
                        )
                    );
            }            
        }
        echo $output;
    }    
    
    function cms_navigation_menu_nav(){
        global $wpdb, $post, $cms_nav_ie_ver, $wp_query, $current_user;
        global $sitepress, $sitepress_settings;    
        
        $show_cat_menu = $this->settings['show_cat_menu']?$this->settings['show_cat_menu']:false;
        if(function_exists('icl_t')){
            $cat_menu_title = $this->settings['cat_menu_title']? icl_t('WPML', 'Categories Menu', $this->settings['cat_menu_title']):__('News', 'wpml-cms-nav');
        }else{
            $cat_menu_title = $this->settings['cat_menu_title']? $this->settings['cat_menu_title']:__('News', 'wpml-cms-nav');    
        }
        
        
        $use_cache = $this->settings['cache'] && !(defined('WPML_CMS_NAV_DISABLE_CACHE') && WPML_CMS_NAV_DISABLE_CACHE);

        $output = null;        
        if ($use_cache) {
            $cache_key = $_SERVER['REQUEST_URI'].'-'.$sitepress->get_current_language();    
            
            if (isset($cms_nav_ie_ver)) {
                $cache_key .= '-ie-'.$cms_nav_ie_ver;
            }
            $output = $wpdb->get_var($wpdb->prepare("
                                SELECT data
                                FROM {$wpdb->prefix}icl_cms_nav_cache
                                WHERE cache_key = %s
                                AND type='nav_menu'
                                AND DATE_SUB(NOW(), INTERVAL ".WPML_CMS_NAV_CACHE_EXPIRE.") < timestamp", $cache_key));
        }
                            
        if (!$output) {
            
            // save the menu to a cache
            ob_start();
            
            $order = isset($this->settings['page_order']) ? $this->settings['page_order'] : 'menu_order';
            $show_cat_menu = isset($this->settings['show_cat_menu']) ? $this->settings['show_cat_menu'] : false;
            
            if(0 === strpos('page', get_option('show_on_front'))){
                $page_on_front = (int)get_option('page_on_front'); 
                $page_for_posts  = (int)get_option('page_for_posts');
            }else{
                $page_on_front = 0;
                $page_for_posts  = 0;        
            }
    
            // exclude some pages                                                                                                            
            $excluded_pages = $wpdb->get_col($wpdb->prepare("
                SELECT post_id 
                FROM {$wpdb->postmeta} pm LEFT JOIN {$wpdb->prefix}icl_translations tr ON pm.post_id = tr.element_id AND element_type='post_page'
                WHERE meta_key='_top_nav_excluded' AND meta_value <> '' AND tr.language_code = %s
                ", $sitepress->get_current_language()));        
            
            $excluded_pages[] = 0; //add this so we don't have an empty array
            if(!$show_cat_menu && $page_for_posts){
                $excluded_pages[] = $page_for_posts;    
            }                                       
            $excluded_pages = join(',', $excluded_pages);
            
            if(!empty($post) && !isset($post->ancestors)){
                $post->ancestors = array();
            }   
            
            if(current_user_can('read_private_pages')){
                $private = " OR post_status='private'";
            }else{
                $private = "";
            }
            
            if( $sitepress_settings['existing_content_language_verified'] && 
                'all' != $sitepress->get_current_language()){   // user has initialized 
                
                $pages = $wpdb->get_col("
                    SELECT p.ID FROM {$wpdb->posts} p
                        JOIN {$wpdb->prefix}icl_translations tr ON p.ID = tr.element_id AND element_type='post_page' 
                    WHERE post_type='page' AND (post_status='publish' {$private})
                        AND post_parent=0 AND p.ID NOT IN ({$excluded_pages})  AND tr.language_code = '{$sitepress->get_current_language()}'
                    ORDER BY {$order}");   
            }else{
                $pages = $wpdb->get_col("
                    SELECT p.ID FROM {$wpdb->posts} p                    
                    WHERE post_type='page' AND (post_status='publish' {$private}) AND post_parent=0 AND p.ID NOT IN ({$excluded_pages})  
                    ORDER BY {$order}");   
            }
            
            
            if($show_cat_menu && (0 !== strpos('page', get_option('show_on_front')) || !get_option('page_for_posts'))){
                if($pages){
                    $res = $wpdb->get_results("SELECT ID, menu_order FROM {$wpdb->posts} WHERE ID IN (".join(',', $pages).") ORDER BY menu_order");
                }
                if($res){
                    foreach($res as $row){
                        $orders[$row->ID] = $row->menu_order;
                    }            
                }
                $blog_special_page_inserted = false;
                foreach($pages as $k=>$p){
                    if(!$blog_special_page_inserted && (isset($orders[$p]) && $orders[$p] > $this->settings['cat_menu_page_order'])){                    
                        $incpages[] = 0;
                        $blog_special_page_inserted = true;
                    }  
                    $incpages[] = $p;                  
                }
                if(!$blog_special_page_inserted){
                    $pages[] = 0;
                }else{
                    $pages = $incpages;
                }
            }
            
            if($pages){   
                ?><div id="menu-wrap"><?php
                ?><ul id="cms-nav-top-menu"><?php
                $incr = 0;
                foreach($pages as $p){
                    $incr++;
                    if($p===0){
                        
                        if($incr==1){
                            $smain_li_classes[] = 'icl_first';
                        }elseif($incr==count($pages)){
                            $smain_li_classes[] = 'icl_last';
                        }
                        if((is_category() && $this->settings['cat_menu_contents'] == 'categories') || 
                            (is_single() && $this->settings['cat_menu_contents'] == 'posts')){
                            $smain_li_classes[] = 'selected_page';
                        }                        
                        
                        ?><li<?php if(!empty($smain_li_classes)):?> class="<?php echo join(' ' , $smain_li_classes)?>"<?php endif?>><a href="<?php echo trailingslashit(get_option('home')) ?>" class="<?php if($this->settings['cat_menu_contents'] != 'nothing'):?>trigger<?php endif?>"><?php echo $cat_menu_title ?><?php if(!isset($cms_nav_ie_ver) || $cms_nav_ie_ver > 6): ?></a><?php endif; ?><?php
                    }else{
                        $sections = array();
                        $subpages = $wpdb->get_results("
                            SELECT p.ID, meta_value AS section
                            FROM {$wpdb->posts} p LEFT JOIN {$wpdb->postmeta} m ON p.ID=m.post_id AND (meta_key='_cms_nav_section' OR meta_key IS NULL)
                            WHERE p.post_parent={$p} AND post_type='page' AND p.post_status='publish' AND p.ID NOT IN ({$excluded_pages}) ORDER BY {$order}");                
                        foreach((array)$subpages as $s){
                            $sections[$s->section][] = $s->ID;    
                        }
                        ksort($sections);  
                        
                        if(isset($post) && 
                                ($p==$post->ID || in_array($p,(array)$post->ancestors) || ($p == $page_for_posts && is_home()))){
                            $sel = true;
                        }else{
                            $sel = false;
                        }                        
                        $page_name_html = apply_filters('icl_nav_page_html', $p, 0);
                        if($page_name_html==$p){
                            $page_name_html = get_the_title($p);
                        }
                        
                        
                        $main_li_classes = array();
                        if($sel){
                            $main_li_classes[] = 'selected_page';
                        }                        
                        if($incr==1){
                            $main_li_classes[] = 'icl_first';
                        }elseif($incr==count($pages)){
                            $main_li_classes[] = 'icl_last';
                        }
                        $has_subages =  $subpages || ($page_for_posts == $p && $this->settings['cat_menu_contents'] != 'nothing');
                        if(isset($post) && $p == $post->ID){
                            $permalink = '#';
                        }else{                            
                            if($p == $page_on_front){
                                $permalink = $sitepress->language_url();                                    
                                if($sitepress_settings['language_negotiation_type'] != 3){
                                    $permalink = trailingslashit($permalink);
                                }
                            }else{
                                $permalink = get_permalink($p);
                            }
                        }
                        ?><li<?php if(!empty($main_li_classes)):?> class="<?php echo join(' ' , $main_li_classes)?>"<?php endif?>><a href="<?php echo $permalink; ?>" class="<?php if($has_subages):?>trigger<?php endif?>"><?php echo $page_name_html ?><?php if(!isset($cms_nav_ie_ver) || $cms_nav_ie_ver > 6): ?></a><?php endif; ?>
                    <?php } ?>
                        <?php if((($page_for_posts == $p || (isset($p->blog_page) && $p->blog_page)) && $this->settings['cat_menu_contents'] != 'nothing')): ?>
                            <?php if(isset($cms_nav_ie_ver) && $cms_nav_ie_ver <= 6): ?><table><tr><td><?php endif; ?>
                            <ul>
                            <?php if($this->settings['cat_menu_contents'] == 'categories'): ?>
                            <?php 
                                $cat_menu_selected = '';
                                if(is_single() || is_category() || $wp_query->is_posts_page){
                                    $cat_menu_selected = ' class="selected_page"';
                                }
                                if(is_single() && !is_page()){
                                    $cats = get_the_category();
                                    foreach((array)$cats as $cat){ $post_cats[] = $cat->cat_ID;}
                                }
                                $categories = get_categories('child_of=0');
                                foreach($categories as $cat){
                                    echo '<li';
                                    if(in_array($cat->cat_ID, (array)$post_cats)){ $post_in_this_cat++; }
                                    if($wp_query->query_vars['cat']==$cat->cat_ID || $post_in_this_cat==1 ){
                                        echo ' class="selected_subpage"';
                                    } 
                                    echo  '>';
                                    echo '<a href="'.get_category_link($cat->cat_ID).'">';
                                    echo apply_filters('single_cat_title', $cat->cat_name);
                                    echo '</a>';
                                    echo '</li>';                            
                                }
                            ?>
                            <?php elseif($this->settings['cat_menu_contents'] == 'posts'): ?>
                                <?php 
                                    $postbk = $post; // preserve $post                                                                  
                                    $cmsnavq = new WP_Query();
                                    $cmsnavq->query('suppress_filters=0');
                                    if ( $cmsnavq->have_posts() ) : while ( $cmsnavq->have_posts() ) : $cmsnavq->the_post(); 
                                    ?><li<?php if(get_the_ID()==get_query_var('p')):?> class="selected_subpage"<?php endif?>>
                                        <a href="<?php the_permalink()?>"><?php the_title()?></a></li><?php
                                    endwhile; endif;
                                    $post = $postbk; // restore $post
                                ?>
                            <?php endif ; ?>
                            </ul>
                            <?php if(isset($cms_nav_ie_ver) && $cms_nav_ie_ver <= 6): ?></td></tr></table><?php endif; ?>
                        <?php elseif($subpages):?>
                            <?php if(isset($cms_nav_ie_ver) && $cms_nav_ie_ver <= 6): ?><table><tr><td><?php endif; ?>
                            <ul>
                                <?php foreach($sections as $sec_name=>$sec): ?>
                                    <?php if($sec_name): ?>
                                    <li class="section icl-top-nav-section-<?php echo sanitize_title_with_dashes($sec_name) ?>"><?php echo $sec_name ?></li>
                                    <?php endif; ?>
                                    <?php foreach($sec as $sp):?>                            
                                    <li<?php if($sp==$post->ID):?> class="selected_subpage"<?php endif?>><?php                            
                                        $subpage_name_html = apply_filters('icl_nav_page_html', $sp, 1);
                                        if($subpage_name_html==$sp){
                                            $subpage_name_html = get_the_title($sp);
                                        }
                                        if($sp!=$post->ID):?><a href="<?php echo get_permalink($sp); ?>" <?php if(in_array($sp,(array)$post->ancestors)): ?>class="selected"<?php endif;?>><?php endif?><?php echo $subpage_name_html ?><?php if($sp!=$post->ID):?></a><?php endif                             
                                    ?></li>
                                    <?php endforeach; ?>
                                <?php endforeach; ?>
                            </ul>
                            <?php if(isset($cms_nav_ie_ver) && $cms_nav_ie_ver <= 6): ?></td></tr></table><?php endif; ?>
                        <?php endif; ?>                    
                        <?php if(isset($cms_nav_ie_ver) && $cms_nav_ie_ver <= 6): ?></a><?php endif; ?>
                    </li>
                    <?php   
                }
                ?></ul></div><br class="cms-nav-clearit" /><?php
            }
            
            $output = ob_get_contents();
            ob_end_clean();
         
            if ($use_cache) {   
                $wpdb->query($wpdb->prepare("DELETE FROM
                             {$wpdb->prefix}icl_cms_nav_cache
                             WHERE cache_key=%s
                             AND type='nav_menu'", $cache_key));            
                $wpdb->insert($wpdb->prefix.'icl_cms_nav_cache', 
                    array(
                        'cache_key'=>$cache_key, 
                        'type'=>'nav_menu', 
                        'data'=>$output
                        )
                    );
            }
        }
        
        echo $output;
    }    
    
    function cms_navigation_page_navigation(){
        if(!is_page()) return;
        global $post, $wpdb, $current_user;
        global $sitepress;    
        
        if($post == null) {
            return;
        }
        
        $use_cache = isset($this->settings['cache']) && $this->settings['cache'] && !(defined('WPML_CMS_NAV_DISABLE_CACHE') && WPML_CMS_NAV_DISABLE_CACHE);

        $output = null;        
        if ($use_cache) {
            
            $cache_key = $_SERVER['REQUEST_URI'].'-'.$sitepress->get_current_language();    
            
            $output = $wpdb->get_var($wpdb->prepare("
                                SELECT data
                                FROM {$wpdb->prefix}icl_cms_nav_cache
                                WHERE cache_key=%s
                                AND type='nav_page'
                                AND DATE_SUB(NOW(), INTERVAL ".WPML_CMS_NAV_CACHE_EXPIRE.") < timestamp", $cache_key));
        }
        
        if (!$output) {
        
            // save the menu to a cache
            ob_start();
            
            
            $order = isset($this->settings['page_order']) ? $this->settings['page_order'] : 'menu_order';
            $heading_start = isset($this->settings['heading_start']) ? $this->settings['heading_start'] : '<h4>';
            $heading_end = isset($this->settings['heading_end']) ? $this->settings['heading_end'] : '</h4>';
                
            // is home?
            $is_home = get_post_meta($post->ID,'_cms_nav_minihome',true);        
            if($is_home || !$post->ancestors){
                $pid = $post->ID;
            }else{
                //get top level page parent or home
                $parent = $post->ancestors[0];            
                do{
                    $uppost = $wpdb->get_row("
                        SELECT p1.ID, p1.post_parent, p2.meta_value, (p2.meta_value IS NOT NULL && p2.meta_value <> '') AS minihome 
                        FROM {$wpdb->posts} p1
                            LEFT JOIN {$wpdb->postmeta} p2 ON p1.ID=p2.post_id AND (meta_key='_cms_nav_minihome' OR meta_key IS NULL)
                            WHERE post_type='page' AND p1.ID={$parent}
                    ");
                    $pid = $uppost->ID;
                    $parent = $uppost->post_parent;
                    $minihome = $uppost->minihome;        
                }while($parent!=0 && !$minihome);
            } 
                      
            echo $heading_start;
            if($pid!=$post->ID){ 
                ?><a href="<?php echo get_permalink($pid); ?>"><?php 
            } 
            echo get_the_title($pid);
            if($pid!=$post->ID){
                ?></a><?php
            }
            echo $heading_end;
            ?>
            
            <?php
    
            if (empty($pid)) return;
    
            $sub = $wpdb->get_results("
                    SELECT p1.ID, meta_value AS section FROM {$wpdb->posts} p1 
                    LEFT JOIN {$wpdb->postmeta} p2 ON p1.ID=p2.post_id AND (meta_key='_cms_nav_section' OR meta_key IS NULL)
                    WHERE post_parent='{$pid}' AND post_type='page' AND post_status='publish' ORDER BY {$order}"); 
            if(empty($sub))  return;                   
            foreach($sub as $s){
                $sections[$s->section][] = $s->ID;    
            }
            ksort($sections);    
            echo '<ul class="cms-nav-sidebar">';
            foreach($sections as $sec_name=>$sec){
                ?>            
                    <?php if($sec_name): ?>
                    <li class="cms-nav-sub-section"><?php echo $sec_name ?></li>
                    <?php endif; ?>
                    <?php foreach($sec as $s):?>
                    <li class="<?php if($post->ID==$s):?>selected_page_side <?php endif;?>icl-level-1"><?php
                        if($post->ID!=$s):?><a href="<?php echo get_permalink($s); ?>"><?php endif?><span><?php echo get_the_title($s) ?></span><?php if($post->ID!=$s):?></a><?php endif;                                
                            if(!get_post_meta($s, '_cms_nav_minihome', 1)){
                                $this->__cms_navigation_child_pages_recursive($s, $order); 
                            }                
                    ?></li>
                    <?php endforeach;?>            
                <?php
            }
            echo '</ul>';

            $output = ob_get_contents();
            ob_end_clean();
         
            if ($use_cache) {   
                $wpdb->query($wpdb->prepare("DELETE FROM
                             {$wpdb->prefix}icl_cms_nav_cache
                             WHERE cache_key=%s
                             AND type='nav_page'", $cache_key));            
                $wpdb->insert($wpdb->prefix.'icl_cms_nav_cache', 
                    array(
                        'cache_key'=>$cache_key, 
                        'type'=>'nav_page', 
                        'data'=>$output
                        )
                    );
            }
            
        }
        
        echo $output;
    }

    function __cms_navigation_child_pages_recursive($pid, $order, $level=2){
        global $wpdb, $post;
        $subpages = $wpdb->get_results("
            SELECT p1.ID, p2.meta_value IS NOT NULL AS minihome FROM {$wpdb->posts} p1 
            LEFT JOIN {$wpdb->postmeta} p2 ON p1.ID=p2.post_id AND (meta_key='_cms_nav_minihome' OR meta_key IS NULL)
            WHERE post_parent={$pid} AND post_type='page' AND post_status='publish' ORDER BY {$order}");        
         if($subpages): ?><ul>
            <?php foreach($subpages as $s): 
            ?><li class="<?php if($post->ID==$s->ID):?>selected <?php endif;?>icl-level-<?php echo $level ?>"><?php
                if($post->ID!=$s->ID):?><a href="<?php echo get_permalink($s->ID)?>"><?php endif;?><span><?php echo get_the_title($s->ID) ?></span><?php if($post->ID!=$s->ID):?></a><?php endif;
                if(!$s->minihome) $this->__cms_navigation_child_pages_recursive($s->ID, $order, $level+1); 
            ?></li>
            <?php endforeach; ?>
        </ul>
        <?php endif; 
    }    
    
    function cms_navigation_update_post_settings($post_id, $post){
        global $wpdb;
                         
        // clear the caches
        $this->cache['offsite_url_cache']->clear();
        @mysql_query("TRUNCATE {$wpdb->prefix}icl_cms_nav_cache");
        
        if(
            (isset($_POST['post_type']) && $_POST['post_type']!='page'    ) || 
            (isset($_POST['action'])    && $_POST['action']=='inline-save') || 
            (isset($_POST['autosave'])  && $_POST['autosave']) || 
            (isset($_POST['post_type']) && $_POST['post_type']=='revision')  || 
            (isset($post->post_status)  && $post->post_status=='auto-draft')
        ) return;
        
        if(!empty($_POST['exclude_from_top_nav'])){
            update_post_meta($post_id, '_top_nav_excluded',1);
        }else{
            delete_post_meta($post_id, '_top_nav_excluded');
        }
        if(!empty($_POST['cms_nav_minihome'])){
            update_post_meta($post_id, '_cms_nav_minihome',1);
        }else{
            delete_post_meta($post_id, '_cms_nav_minihome');
        }
        if(!empty($_POST['cms_nav_section_new'])){
            update_post_meta($post_id, '_cms_nav_section', $_POST['cms_nav_section_new']);
        }else{
            delete_post_meta($post_id, '_cms_nav_section');
        }    
        if(isset($_POST['cms_nav_section_new']) && !trim($_POST['cms_nav_section_new'])){
            if(!empty($_POST['cms_nav_section'])){
                update_post_meta($post_id, '_cms_nav_section', $_POST['cms_nav_section']);
            }else{
                delete_post_meta($post_id, '_cms_nav_section');
            }        
        }
        if(!empty($_POST['_cms_nav_offsite_url'])){
            update_post_meta($post_id, '_cms_nav_offsite_url', $_POST['_cms_nav_offsite_url']);
        }else{
            delete_post_meta($post_id, '_cms_nav_offsite_url');
        }
        
    }    
    
    function cms_navigation_page_edit_options(){
        if(function_exists('add_meta_box')){
            add_meta_box('cmsnavdiv', __('CMS Navigation', 'wpml-cms-nav'), array($this, 'cms_navigation_meta_box'), 'page', 'normal', 'high');
        }
    }

    function cms_navigation_meta_box($post){
        global $wpdb;
        //if it's a new post copy some custom fields from the original post
        if($post->ID == 0 && isset($_GET['trid']) && $_GET['trid']){
            $copied_custom_fields = array('_top_nav_excluded', '_cms_nav_minihome');
            foreach($copied_custom_fields as $k=>$v){
                $copied_custom_fields[$k] = "'".$v."'";                    
            }
            $res = $wpdb->get_results("
                SELECT meta_key, meta_value FROM {$wpdb->prefix}icl_translations tr 
                JOIN {$wpdb->postmeta} pm ON tr.element_id = pm.post_id
                WHERE tr.trid={$_GET['trid']} AND (source_language_code IS NULL OR source_language_code='')
                    AND meta_key IN (".join(',',$copied_custom_fields).")
            ");
            foreach($res as $r){
                $post_custom[$r->meta_key][0] = $r->meta_value;    
            }
        }else{
            // get sections
            $sections = $wpdb->get_col("SELECT DISTINCT meta_value FROM {$wpdb->postmeta} WHERE meta_key='_cms_nav_section'");
            $post_custom = get_post_custom($post->ID);    
            $cms_nav_section = isset($post_custom['_cms_nav_section'][0]) ? $post_custom['_cms_nav_section'][0] : '';        
        }        
        $top_nav_excluded = isset($post_custom['_top_nav_excluded'][0]) ? $post_custom['_top_nav_excluded'][0] : '';
        $cms_nav_minihome = isset($post_custom['_cms_nav_minihome'][0]) ? $post_custom['_cms_nav_minihome'][0] : '';
        $cms_nav_offsite_url = isset($post_custom['_cms_nav_offsite_url'][0]) ? $post_custom['_cms_nav_offsite_url'][0] : '';
        if($top_nav_excluded){ $top_nav_excluded = 'checked="checked"'; }
        if($cms_nav_minihome){ $cms_nav_minihome = 'checked="checked"'; }
        ?>
        <p>
        <label><input type="checkbox" value="1" name="exclude_from_top_nav" <?php echo $top_nav_excluded ?> />&nbsp; <?php echo __('Exclude from the top navigation', 'wpml-cms-nav') ?></label> &nbsp;
        <label><input type="checkbox" value="1" name="cms_nav_minihome" <?php echo $cms_nav_minihome ?> />&nbsp; <?php echo __('Mini home (don\'t list child pages for this page)', 'wpml-cms-nav') ?></label>
        </p>
        <p>
        <?php echo __('Section', 'wpml-cms-nav')?>
        <?php if(!empty($sections)): ?>
            <select name="cms_nav_section">    
            <option value=''><?php echo __('--none--', 'wpml-cms-nav') ?></option>
            <?php foreach($sections as $s):?>
            <option <?php if($s==$cms_nav_section) echo 'selected="selected"'?>><?php echo $s ?></option>
            <?php endforeach; ?>        
            </select>
        <?php endif; ?>    
        <input type="text" name="cms_nav_section_new" value="" <?php if(!empty($sections)): ?>style="display:none"<?php endif; ?> />
        <?php if(!empty($sections)): ?>
        <a href="javascript:;" id="cms_nav_add_section"><?php echo __('enter new', 'wpml-cms-nav') ?></a>
        <?php endif; ?>    
        </p>
        <p>
        <label><?php echo __('Offsite page address', 'wpml-cms-nav') ?> <input type="text" style="width:100%" name="_cms_nav_offsite_url" value="<?php echo esc_attr($cms_nav_offsite_url) ?>" /></label>
        </p>
        <?php
    }    
    
    function cms_navigation_js(){
        ?>
        <script type="text/javascript">
        var wpml_cms_nav_ajxloaderimg_src = '<?php echo WPML_CMS_NAV_PLUGIN_URL ?>/res/img/ajax-loader.gif';
        var wpml_cms_nav_ajxloaderimg = '<img src="'+wpml_cms_nav_ajxloaderimg_src+'" alt="loading" width="16" height="16" />';
        addLoadEvent(function(){                   
                    jQuery('#cms_nav_add_section').click(cms_nav_switch_adding_section);    
        });
        function cms_nav_switch_adding_section(){
            if('none'==jQuery("select[name='cms_nav_section']").css('display')){
                jQuery("select[name='cms_nav_section']").show();
                jQuery("input[name='cms_nav_section_new']").hide();
                jQuery("input[name='cms_nav_section_new']").attr('value','');
                jQuery(this).html('<?php echo wpml_cms_nav_js_escape(__('enter new', 'wpml-cms-nav')); ?>');                                    
            }else{
                jQuery("select[name='cms_nav_section']").hide();
                jQuery("input[name='cms_nav_section_new']").show();            
                jQuery(this).html('<?php echo wpml_cms_nav_js_escape(__('cancel', 'wpml-cms-nav')); ?>');
            }
            
        }
        </script>
        <?php
    }    
    
    function cms_navigation_css(){
        if(defined('ICL_DONT_LOAD_NAVIGATION_CSS') && ICL_DONT_LOAD_NAVIGATION_CSS){
            return;
        }
        $path = dirname(substr(__FILE__, strpos(__FILE__,'wp-content')));
        $path = str_replace('\\','/',$path);
        $stylesheet = rtrim(get_option('siteurl'),'/') . '/' . $path . '/res'; 
        wp_enqueue_style('cms-navigation-style-base', 
            WPML_CMS_NAV_PLUGIN_URL . '/res/css/cms-navigation-base.css', array(), WPML_CMS_NAV_VERSION, 'screen');            
        wp_enqueue_style('cms-navigation-style', 
            WPML_CMS_NAV_PLUGIN_URL . '/res/css/cms-navigation.css', array(), WPML_CMS_NAV_VERSION, 'screen');            
    }
    
    function sidebar_navigation_widget_init(){
        function sidebar_navigation_widget($args){
            extract($args, EXTR_SKIP);
            echo $before_widget;
            global $iclCMSNavigation;                
            $iclCMSNavigation->cms_navigation_page_navigation();
            echo $after_widget;
        }
        wp_register_sidebar_widget('sidebar-navigation', __('Sidebar Navigation', 'wpml-cms-nav'), 'sidebar_navigation_widget', array('classname'=>'icl_sidebar_navigation'));
    }
    
    function rewrite_page_link($url, $page_id){
        if ($this->cache['offsite_url_cache']->has_key($page_id.'_cms_nav_offsite_url')) {
            // get from the cache.
            $offsite_url = $this->cache['offsite_url_cache']->get($page_id.'_cms_nav_offsite_url');
            if($offsite_url){
                $url = $offsite_url;
            }
            return $url;
        }
        $offsite_url = get_post_meta($page_id, '_cms_nav_offsite_url', true);
        $this->cache['offsite_url_cache']->set($page_id.'_cms_nav_offsite_url', $offsite_url);
        if($offsite_url){
            $url = $offsite_url;
        }
        return $url;
    }
    
    function redirect_offsite_urls($q){
        if($q->is_page && !empty($q->queried_object_id) && $offsite_url = get_post_meta($q->queried_object_id, '_cms_nav_offsite_url', true)){
            wp_redirect($offsite_url, 301);
        }
    }
    
    function icl_dashboard_widget_content(){
        ?>
        
        <div><a href="javascript:void(0)" onclick="jQuery(this).parent().next('.wrapper').slideToggle();" style="display:block; padding:5px; border: 1px solid #eee; margin-bottom:2px; background-color: #F7F7F7;"><?php _e('Navigation', 'wpml-cms-nav') ?></a></div>
        
        <div class="wrapper" style="display:none; padding: 5px 10px; border: 1px solid #eee; border-top: 0px; margin:-11px 0 2px 0;">
        <p><?php echo __('WPML provides advanced menus and navigation to go with your WordPress website, including drop-down menus, breadcrumbs and sidebar navigation.', 'wpml-cms-nav') ?></p>
        <p><a class="button secondary" href="<?php echo 'admin.php?page=' . basename(WPML_CMS_NAV_PLUGIN_PATH) . '/menu/navigation.php' ?>"><?php echo __('Configure navigation', 'wpml-cms-nav') ?></a></p>    
        </div>        
        <?php
    }
    
    function plugin_action_links($links, $file){
        $this_plugin = basename(WPML_CMS_NAV_PLUGIN_PATH) . '/plugin.php';
        if($file == $this_plugin) {
            $links[] = '<a href="admin.php?page='.basename(WPML_CMS_NAV_PLUGIN_PATH).'/menu/navigation.php">' . 
                __('Configure', 'wpml-cms-nav') . '</a>';
        }
        return $links;
    }
    
    function plugin_activate(){
        require_once WPML_CMS_NAV_PLUGIN_PATH . '/inc/cms-navigation-schema.php';
        wpml_cms_nav_default_settings();
        wpml_cms_nav_db_setup();
    }
    
    function plugin_deactivate(){
        if(!empty($this->cache)){
            $this->clear_cache();    
        }        
    }
    
    // Localization
    function plugin_localization(){
        load_plugin_textdomain( 'wpml-cms-nav', false, WPML_CMS_NAV_PLUGIN_FOLDER . '/locale');
    }
    
}