public function prepareQueryBeforeCount(xPDOQuery $c)
 {
     $c->leftJoin('modUserProfile', 'Profile');
     $query = $this->getProperty('query', '');
     if (!empty($query)) {
         $c->where(array('modUser.username:LIKE' => '%' . $query . '%', 'OR:Profile.fullname:LIKE' => '%' . $query . '%', 'OR:Profile.email:LIKE' => '%' . $query . '%'));
     }
     $userGroup = $this->getProperty('usergroup', 0);
     if (!empty($userGroup)) {
         if ($userGroup === 'anonymous') {
             $c->join('modUserGroupMember', 'UserGroupMembers', 'LEFT OUTER JOIN');
             $c->where(array('UserGroupMembers.user_group' => NULL));
         } else {
             $c->distinct();
             $c->innerJoin('modUserGroupMember', 'UserGroupMembers');
             $c->where(array('UserGroupMembers.user_group' => $userGroup));
         }
     }
     return $c;
 }