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() {
  38                 return true;
  39         }
  40
  41         function isSyndicated() {
  42                 return false;
  43         }
  44
  45         function sortDescending() {
  46                 return false;
  47         }
  48
  49         function getQueryInfo() {
  50                 return array(
  51                         'tables' => array( 'p1' => 'page', 'redirect', 'p2' => 'page' ),
  52                         'fields' => array( 'namespace' => 'p1.page_namespace',
  53                                         'title' => 'p1.page_title',
  54                                         'value' => 'p1.page_title',
  55                                         'rd_namespace',
  56                                         'rd_title',
  57                                         'rd_fragment',
  58                                         'rd_interwiki',
  59                                         'redirid' => 'p2.page_id' ),
  60                         'conds' => array( 'p1.page_is_redirect' => 1 ),
  61                         'join_conds' => array( 'redirect' => array(
  62                                         'LEFT JOIN', 'rd_from=p1.page_id' ),
  63                                 'p2' => array( 'LEFT JOIN', array(
  64                                         'p2.page_namespace=rd_namespace',
  65                                         'p2.page_title=rd_title' ) ) )
  66                 );
  67         }
  68
  69         function getOrderFields() {
  70                 return array( 'p1.page_namespace', 'p1.page_title' );
  71         }
  72
  73         /**
  74          * Cache page existence for performance
  75          *
  76          * @param DatabaseBase $db
  77          * @param ResultWrapper $res
  78          */
  79         function preprocessResults( $db, $res ) {
  80                 $batch = new LinkBatch;
  81                 foreach ( $res as $row ) {
  82                         $batch->add( $row->namespace, $row->title );
  83                         $batch->addObj( $this->getRedirectTarget( $row ) );
  84                 }
  85                 $batch->execute();
  86
  87                 // Back to start for display
  88                 if ( $res->numRows() > 0 ) {
  89                         // If there are no rows we get an error seeking.
  90                         $db->dataSeek( $res, 0 );
  91                 }
  92         }
  93
  94         protected function getRedirectTarget( $row ) {
  95                 if ( isset( $row->rd_title ) ) {
  96                         return Title::makeTitle( $row->rd_namespace,
  97                                 $row->rd_title, $row->rd_fragment,
  98                                 $row->rd_interwiki
  99                         );
 100                 } else {
 101                         $title = Title::makeTitle( $row->namespace, $row->title );
 102                         $article = WikiPage::factory( $title );
 103                         return $article->getRedirectTarget();
 104                 }
 105         }
 106
 107         /**
 108          * @param Skin $skin
 109          * @param object $result Result row
 110          * @return string
 111          */
 112         function formatResult( $skin, $result ) {
 113                 # Make a link to the redirect itself
 114                 $rd_title = Title::makeTitle( $result->namespace, $result->title );
 115                 $rd_link = Linker::link(
 116                         $rd_title,
 117                         null,
 118                         array(),
 119                         array( 'redirect' => 'no' )
 120                 );
 121
 122                 # Find out where the redirect leads
 123                 $target = $this->getRedirectTarget( $result );
 124                 if ( $target ) {
 125                         # Make a link to the destination page
 126                         $lang = $this->getLanguage();
 127                         $arr = $lang->getArrow() . $lang->getDirMark();
 128                         $targetLink = Linker::link( $target );
 129                         return "$rd_link $arr $targetLink";
 130                 } else {
 131                         return "<del>$rd_link</del>";
 132                 }
 133         }
 134
 135         protected function getGroupName() {
 136                 return 'pages';
 137         }
 138 }