includes/specials/SpecialDeadendpages.php

   1 <?php
   2 /**
   3  * Implements Special:Deadenpages
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup SpecialPage
  22  */
  23
  24 /**
  25  * A special page that list pages that contain no link to other pages
  26  *
  27  * @ingroup SpecialPage
  28  */
  29 class DeadendPagesPage extends PageQueryPage {
  30
  31         function getName( ) {
  32                 return "Deadendpages";
  33         }
  34
  35         function getPageHeader() {
  36                 return wfMsgExt( 'deadendpagestext', array( 'parse' ) );
  37         }
  38
  39         /**
  40          * LEFT JOIN is expensive
  41          *
  42          * @return true
  43          */
  44         function isExpensive( ) {
  45                 return 1;
  46         }
  47
  48         function isSyndicated() { return false; }
  49
  50         /**
  51          * @return false
  52          */
  53         function sortDescending() {
  54                 return false;
  55         }
  56
  57         /**
  58          * @return string an sqlquery
  59          */
  60         function getSQL() {
  61                 $dbr = wfGetDB( DB_SLAVE );
  62                 list( $page, $pagelinks ) = $dbr->tableNamesN( 'page', 'pagelinks' );
  63                 return "SELECT 'Deadendpages' as type, page_namespace AS namespace, page_title as title, page_title AS value " .
  64         "FROM $page LEFT JOIN $pagelinks ON page_id = pl_from " .
  65         "WHERE pl_from IS NULL " .
  66         "AND page_namespace = 0 " .
  67         "AND page_is_redirect = 0";
  68         }
  69 }
  70
  71 /**
  72  * Constructor
  73  */
  74 function wfSpecialDeadendpages() {
  75
  76         list( $limit, $offset ) = wfCheckLimits();
  77
  78         $depp = new DeadendPagesPage();
  79
  80         return $depp->doQuery( $offset, $limit );
  81 }