includes/specials/SpecialListredirects.php

   1 <?php
   2 /**
   3  * Implements Special:Listredirects
   4  *
   5  * Copyright © 2006 Rob Church
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  20  * http://www.gnu.org/copyleft/gpl.html
  21  *
  22  * @file
  23  * @ingroup SpecialPage
  24  * @author Rob Church <robchur@gmail.com>
  25  */
  26
  27 /**
  28  * Special:Listredirects - Lists all the redirects on the wiki.
  29  * @ingroup SpecialPage
  30  */
  31 class ListredirectsPage extends QueryPage {
  32
  33         function __construct( $name = 'Listredirects' ) {
  34                 parent::__construct( $name );
  35         }
  36
  37         function isExpensive() { return true; }
  38         function isSyndicated() { return false; }
  39         function sortDescending() { return false; }
  40
  41         function getQueryInfo() {
  42                 return array(
  43                         'tables' => array( 'p1' => 'page', 'redirect', 'p2' => 'page' ),
  44                         'fields' => array( 'p1.page_namespace AS namespace',
  45                                         'p1.page_title AS title',
  46                                         'rd_namespace',
  47                                         'rd_title',
  48                                         'rd_fragment',
  49                                         'rd_interwiki',
  50                                         'p2.page_id AS redirid' ),
  51                         'conds' => array( 'p1.page_is_redirect' => 1 ),
  52                         'join_conds' => array( 'redirect' => array(
  53                                         'LEFT JOIN', 'rd_from=p1.page_id' ),
  54                                 'p2' => array( 'LEFT JOIN', array(
  55                                         'p2.page_namespace=rd_namespace',
  56                                         'p2.page_title=rd_title' ) ) )
  57                 );
  58         }
  59
  60         function getOrderFields() {
  61                 return array ( 'p1.page_namespace', 'p1.page_title' );
  62         }
  63
  64         /**
  65          * Cache page existence for performance
  66          *
  67          * @param $db DatabaseBase
  68          */
  69         function preprocessResults( $db, $res ) {
  70                 $batch = new LinkBatch;
  71                 foreach ( $res as $row ) {
  72                         $batch->add( $row->namespace, $row->title );
  73                         $batch->addObj( $this->getRedirectTarget( $row ) );
  74                 }
  75                 $batch->execute();
  76
  77                 // Back to start for display
  78                 if ( $db->numRows( $res ) > 0 ) {
  79                         // If there are no rows we get an error seeking.
  80                         $db->dataSeek( $res, 0 );
  81                 }
  82         }
  83
  84         protected function getRedirectTarget( $row ) {
  85                 if ( isset( $row->rd_title ) ) {
  86                         return Title::makeTitle( $row->rd_namespace,
  87                                 $row->rd_title, $row->rd_fragment,
  88                                 $row->rd_interwiki
  89                         );
  90                 } else {
  91                         $title = Title::makeTitle( $row->namespace, $row->title );
  92                         $article = new Article( $title );
  93                         return $article->getRedirectTarget();
  94                 }
  95         }
  96
  97         function formatResult( $skin, $result ) {
  98                 global $wgContLang;
  99
 100                 # Make a link to the redirect itself
 101                 $rd_title = Title::makeTitle( $result->namespace, $result->title );
 102                 $rd_link = $skin->link(
 103                         $rd_title,
 104                         null,
 105                         array(),
 106                         array( 'redirect' => 'no' )
 107                 );
 108
 109                 # Find out where the redirect leads
 110                 $target = $this->getRedirectTarget( $result );
 111                 if( $target ) {
 112                         # Make a link to the destination page
 113                         $arr = $wgContLang->getArrow() . $wgContLang->getDirMark();
 114                         $targetLink = $skin->link( $target );
 115                         return "$rd_link $arr $targetLink";
 116                 } else {
 117                         return "<del>$rd_link</del>";
 118                 }
 119         }
 120 }