improved better search

activated terms filtration regarding useinadvancedsearch term field
added all children of level 2 terms

materio_search_api.module

@@ -731,11 +731,13 @@ function materio_search_api_advanced_search_form($form, &$form_state){
     foreach ($tree as $term) {
       // dsm($term, "term");
 
+      if($term->field_used_on_advanced_search['und'][0]['value'] == 0)
+       continue;
+
       $children = taxonomy_get_children($term->tid, $vid);
       // dsm($children, "children");
 
-      if($term->field_used_on_advanced_search['und'][0]['value'] == 0
-        || !count($children))
+      if(!count($children))
        continue;
 
       $form['slider']['voc-'.$vid]['tree-'.$term->tid] = array(
@@ -761,26 +763,29 @@ function materio_search_api_advanced_search_form($form, &$form_state){
 
       $options = array();
       foreach ($children as $tid => $child) {
-        // $child = taxonomy_term_load($child->tid);
-        // if($child->field_used_on_advanced_search['und'][0]['value'] == 0){
-        //  continue;
-        // }
+        $child = taxonomy_term_load($child->tid);
+        // dsm($child, 'child');
+        if($child->field_used_on_advanced_search['und'][0]['value'] == 0){
+         continue;
+        }
 
-        $children2 = taxonomy_get_children($child->tid, $vid);
+        // $children2 = taxonomy_get_children($child->tid, $vid);
+        $children2 = taxonomy_get_children_all($child->tid, $vid);
         // dsm($children2, "children2");
 
-        if(count($children2))
-          $options[$tid] = $child->name;
+        if(!count($children2))
+          continue;
+
+        $options[$tid] = $child->name;
 
         $classes2 = array("treelevel2", $child->tid);
 
         $options2 = array();
         $dflt_values2 = array();
         foreach ($children2 as $tid2 => $child2) {
-          // $child2 = taxonomy_term_load($child2->tid);
-          // if($child2->field_used_on_advanced_search['und'][0]['value'] == 0){
-          //  continue;
-          // }
+          $child2 = taxonomy_term_load($tid2);
+          if($child2->field_used_on_advanced_search['und'][0]['value'] == 0)
+           continue;
 
           $options2[$tid2] = $child2->name;
 
@@ -832,6 +837,21 @@ function materio_search_api_advanced_search_form($form, &$form_state){
   return $form;
 }
 
+function taxonomy_get_children_all($tid, $vid = 0, $key = 'tid'){
+  $c = taxonomy_get_children($tid, $vid, $key);
+  $result = array();
+  foreach ($c as $t => $d){
+    $result[$t] = $d;
+    $below = taxonomy_get_children_all($t, $vid, $key);
+    if (!empty($below)) {
+      foreach ($below as $nt => $nd){
+        $result[$nt] = $nd;
+      }
+    }
+  }
+  return $result;
+}
+
 function materio_search_api_advanced_search_form_validate($form, &$form_state){
   // dsm($form, '$form');
   // dsm($form_state, '$form_state');