function delete() {
		// delete system permissions
		SystemPermissions::delete("`permission_group_id` = ".$this->getId());
		// delete member permissions
		ContactMemberPermissions::delete("`permission_group_id` = ".$this->getId());
		// delte dimension permissions
		ContactDimensionPermissions::delete("`permission_group_id` = ".$this->getId());
		// delete contact_permission_group entries
		ContactPermissionGroups::delete("`permission_group_id` = ".$this->getId());
		// delete tab panel permissions
		TabPanelPermissions::delete("`permission_group_id` = ".$this->getId());
		
		parent::delete();
	}
 /**
  * Edit group
  *
  * @param void
  * @return null
  */
 function edit()
 {
     $this->setTemplate('add');
     if (!can_manage_security(logged_user())) {
         flash_error(lang('no access permissions'));
         ajx_current("empty");
         return;
     }
     // if
     $group = PermissionGroups::findById(get_id());
     if (!$group instanceof PermissionGroup) {
         flash_error(lang('group dnx'));
         $this->redirectTo('administration', 'groups');
     }
     // if
     $group_data = array_var($_POST, 'group');
     if (!is_array($group_data)) {
         $pg_id = $group->getId();
         $parameters = permission_form_parameters($pg_id);
         // Module Permissions
         $module_permissions = TabPanelPermissions::findAll(array("conditions" => "`permission_group_id` = {$pg_id}"));
         $module_permissions_info = array();
         foreach ($module_permissions as $mp) {
             $module_permissions_info[$mp->getTabPanelId()] = 1;
         }
         $all_modules = TabPanels::findAll(array("conditions" => "`enabled` = 1", "order" => "ordering"));
         $all_modules_info = array();
         foreach ($all_modules as $module) {
             $all_modules_info[] = array('id' => $module->getId(), 'name' => lang($module->getTitle()), 'ot' => $module->getObjectTypeId());
         }
         // System Permissions
         $system_permissions = SystemPermissions::findById($pg_id);
         tpl_assign('module_permissions_info', $module_permissions_info);
         tpl_assign('all_modules_info', $all_modules_info);
         tpl_assign('system_permissions', $system_permissions);
         tpl_assign('permission_parameters', $parameters);
         // users
         $group_users = array();
         $cpgs = ContactPermissionGroups::findAll(array("conditions" => "`permission_group_id` = {$pg_id}"));
         foreach ($cpgs as $cpg) {
             $group_users[] = $cpg->getContactId();
         }
         tpl_assign('groupUserIds', $group_users);
         tpl_assign('users', Contacts::getAllUsers());
         tpl_assign('pg_id', $group->getId());
         tpl_assign('group', $group);
         tpl_assign('group_data', array('name' => $group->getName()));
         add_page_action(lang('delete'), "javascript:if(confirm(lang('confirm delete group'))) og.openLink('" . $group->getDeleteUrl() . "');", 'ico-trash', null, null, true);
     } else {
         try {
             $group->setFromAttributes($group_data);
             DB::beginWork();
             $group->save();
             // set permissions
             $pg_id = $group->getId();
             //save_permissions($pg_id);
             $gr_users = $group->getUsers();
             $gr_users_ids = array();
             if ($post_users = array_var($_POST, 'user')) {
                 foreach ($post_users as $user_id => $val) {
                     if ($val == '1' && is_numeric($user_id)) {
                         $gr_users_ids[] = $user_id;
                     }
                 }
             }
             foreach ($gr_users as $us) {
                 if (!in_array($us->getId(), $gr_users_ids)) {
                     $gr_users_ids[] = $us->getId();
                 }
             }
             // save users
             ContactPermissionGroups::delete("`permission_group_id` = {$pg_id}");
             if ($users = array_var($_POST, 'user')) {
                 foreach ($users as $user_id => $val) {
                     if ($val == '1' && is_numeric($user_id) && Contacts::findById($user_id) instanceof Contact) {
                         $cpg = new ContactPermissionGroup();
                         $cpg->setPermissionGroupId($pg_id);
                         $cpg->setContactId($user_id);
                         $cpg->save();
                     }
                 }
             }
             //ApplicationLogs::createLog($group, ApplicationLogs::ACTION_EDIT);
             DB::commit();
             flash_success(lang('success edit group', $group->getName()));
             ajx_current("back");
         } catch (Exception $e) {
             DB::rollback();
             tpl_assign('error', $e);
             return;
         }
         try {
             save_user_permissions_background(logged_user(), $pg_id, false, $gr_users_ids);
         } catch (Exception $e) {
             tpl_assign('error', $e);
         }
     }
 }