function &fetch_calendar_period_by_ids($ids_array, $params = array(), $sql_params = array())
 {
     $start_date = $params['start_date'];
     $finish_date = $params['finish_date'];
     $sql_params['conditions'][] = ' AND sso.locale_id = "' . CONTENT_LOCALE_ID . '"';
     $sql_params['conditions'][] = " AND tn.start_date >= '{$start_date}' \r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\tAND tn.start_date <= '{$finish_date}' ";
     $result =& parent::fetch_accessible_by_ids($ids_array, $params, $sql_params);
     return $result;
 }
  function & fetch_publish_period_by_ids($ids_array, $params=array(), $sql_params=array())
  {
    $start_date = $params['start_date'];
    $finish_date = $params['finish_date'];

    $sql_params['conditions'][] = ' AND sso.locale_id = "'. CONTENT_LOCALE_ID . '"';
    $sql_params['conditions'][] = " AND sso.id=tn.object_id AND sso.current_version=tn.version";

    $sql_params['conditions'][] =
      " AND ((tn.start_date >= '{$start_date}' AND tn.start_date <= '{$finish_date}')
          OR (tn.finish_date >= '{$start_date}' AND tn.finish_date <= '{$finish_date}')) ";

    return parent :: fetch_accessible_by_ids($ids_array, $params, $sql_params);
  }