From d8d9193156a99bea26e6af6599f026abc7a1e56d Mon Sep 17 00:00:00 2001
From: Silvio <silvio@socioambiental.org>
Date: Tue, 19 Nov 2013 16:37:35 -0200
Subject: Initial code to remove empty menu items (#1333)

---
 jquery_drawer.module | 45 +++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 41 insertions(+), 4 deletions(-)

diff --git a/jquery_drawer.module b/jquery_drawer.module
index 5f759d3..f382b66 100644
--- a/jquery_drawer.module
+++ b/jquery_drawer.module
@@ -70,13 +70,51 @@ function jquery_drawer_block($op = 'list', $delta = 0, $edit = array()) {
 
     case 'view':
       // Get all terms from a given vocabulary
-      $vid              = variable_get('jquery_drawer', '1');
-      $menu             = taxonomy_node_tree_parents($vid);
+      $vid  = variable_get('jquery_drawer', '1');
+      $menu = taxonomy_node_tree_parents($vid);
+
+      // Remove empty menus
+      foreach ($menu as $key => $term) {
+        if (jquery_drawer_check_empty($term->tid)) {
+          unset($menu[$key]);
+        }
+      }
+
       $block['content'] = theme('jquery_drawer', $menu);
       return $block;
   }
 }
 
+/**
+ * Check empty menus.
+ */
+function jquery_drawer_check_empty($tid) {
+  $parents  = array();
+  $nodes    = jquery_drawer_select_nodes(array($tid));
+  $children = jquery_drawer_get_children($tid);
+
+  while ($node = db_fetch_object($nodes)) {
+    $parents[] = $node;
+  }
+
+  if (empty($parents) && empty($children)) {
+    return TRUE;
+  }
+}
+
+/**
+ * Static version of taxonomy_select_nodes().
+ */
+function jquery_drawer_select_nodes($tid) {
+  static $cache = array();
+
+  if (empty($cache[$tid])) {
+    $cache[$tid] = taxonomy_select_nodes(array($tid));
+  }
+
+  return $cache[$tid];
+}
+
 /**
  * Implementation of hook_menu().
  */
@@ -119,7 +157,6 @@ function jquery_drawer_theme() {
  * @ingroup themeable
  */
 function theme_jquery_drawer($menu) {
-
   $output  = '<ul id="drw_tabs">';
   $output .= implode((array) module_invoke_all('jquery_drawer'));
   
@@ -189,7 +226,7 @@ function jquery_drawer_page($tid = NULL) {
 
   if (!isset($cache[$tid])) {
     $output  = '';
-    $nodes   = taxonomy_select_nodes(array($tid));
+    $nodes   = jquery_drawer_select_nodes(array($tid));
     $base    = variable_get('jquery_drawer_link', 'node');
     $tree    = jquery_drawer_get_children($tid);
     $output .= '<ul id="drw_item" class="hidden">';
-- 
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