includes/specials/SpecialDeadendpages.php

   1 <?php
   2 /**
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  17  * http://www.gnu.org/copyleft/gpl.html
  18  */
  19
  20 /**
  21  * @file
  22  * @ingroup SpecialPage
  23  */
  24 class DeadendPagesPage extends PageQueryPage {
  25
  26         function getName( ) {
  27                 return "Deadendpages";
  28         }
  29
  30         function getPageHeader() {
  31                 return wfMsgExt( 'deadendpagestext', array( 'parse' ) );
  32         }
  33
  34         /**
  35          * LEFT JOIN is expensive
  36          *
  37          * @return true
  38          */
  39         function isExpensive( ) {
  40                 return 1;
  41         }
  42
  43         function isSyndicated() { return false; }
  44
  45         /**
  46          * @return false
  47          */
  48         function sortDescending() {
  49                 return false;
  50         }
  51
  52         /**
  53          * @return string an sqlquery
  54          */
  55         function getSQL() {
  56                 $dbr = wfGetDB( DB_SLAVE );
  57                 list( $page, $pagelinks ) = $dbr->tableNamesN( 'page', 'pagelinks' );
  58                 return "SELECT 'Deadendpages' as type, page_namespace AS namespace, page_title as title, page_title AS value " .
  59         "FROM $page LEFT JOIN $pagelinks ON page_id = pl_from " .
  60         "WHERE pl_from IS NULL " .
  61         "AND page_namespace = 0 " .
  62         "AND page_is_redirect = 0";
  63         }
  64 }
  65
  66 /**
  67  * Constructor
  68  */
  69 function wfSpecialDeadendpages() {
  70
  71         list( $limit, $offset ) = wfCheckLimits();
  72
  73         $depp = new DeadendPagesPage();
  74
  75         return $depp->doQuery( $offset, $limit );
  76 }