/**
  * Public function for saving control details 
  *
  * @param HTTP:: control id, control details fields
  * @return redirect to function view_control_groups
  */
 public function save_control_details()
 {
     if (!$this->add && !$this->edit) {
         $GLOBALS['phpgw']->redirect_link('/index.php', array('menuaction' => 'controller.uicontrol.index'));
     }
     $control_id = phpgw::get_var('control_id');
     // Update existing control details
     $delete_control_groups = false;
     if (isset($control_id) && $control_id > 0) {
         $control = $this->so->get_single($control_id);
         $control_area_id_in_db = $control->get_control_area_id();
         $control->populate();
         $control_area_id_from_req = $control->get_control_area_id();
         // DELETE EARLIER SAVED CONTROL GROUPS
         // If control are is different from a previous registration - delete related groups
         if ($control_area_id_in_db > 0 & $control_area_id_in_db != $control_area_id_from_req) {
             $delete_control_groups = true;
         }
     } else {
         $control = new controller_control();
         $control->populate();
     }
     // SAVE CONTROL DETAILS
     if ($control->validate()) {
         if ($delete_control_groups) {
             // Deleting earlier saved control groups
             $this->so_control_group_list->delete_control_groups($control_id);
             $saved_control_items = $this->so_control_item_list->get_control_items_by_control($control_id);
             foreach ($saved_control_items as $control_item) {
                 $this->so_control_item_list->delete($control->get_id(), $control_item->get_id());
             }
         }
         $control_id = $this->so->store($control);
         $this->redirect(array('menuaction' => 'controller.uicontrol.view_control_groups', 'control_id' => $control_id));
     } else {
         $this->view_control_details($control);
     }
 }