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( 'namespace' => 'p1.page_namespace',
  45                                         'title' => 'p1.page_title',
  46                                         'value' => 'p1.page_title',
  47                                         'rd_namespace',
  48                                         'rd_title',
  49                                         'rd_fragment',
  50                                         'rd_interwiki',
  51                                         'redirid' => 'p2.page_id' ),
  52                         'conds' => array( 'p1.page_is_redirect' => 1 ),
  53                         'join_conds' => array( 'redirect' => array(
  54                                         'LEFT JOIN', 'rd_from=p1.page_id' ),
  55                                 'p2' => array( 'LEFT JOIN', array(
  56                                         'p2.page_namespace=rd_namespace',
  57                                         'p2.page_title=rd_title' ) ) )
  58                 );
  59         }
  60
  61         function getOrderFields() {
  62                 return array ( 'p1.page_namespace', 'p1.page_title' );
  63         }
  64
  65         /**
  66          * Cache page existence for performance
  67          *
  68          * @param $db DatabaseBase
  69          * @param $res ResultWrapper
  70          */
  71         function preprocessResults( $db, $res ) {
  72                 $batch = new LinkBatch;
  73                 foreach ( $res as $row ) {
  74                         $batch->add( $row->namespace, $row->title );
  75                         $batch->addObj( $this->getRedirectTarget( $row ) );
  76                 }
  77                 $batch->execute();
  78
  79                 // Back to start for display
  80                 if ( $db->numRows( $res ) > 0 ) {
  81                         // If there are no rows we get an error seeking.
  82                         $db->dataSeek( $res, 0 );
  83                 }
  84         }
  85
  86         protected function getRedirectTarget( $row ) {
  87                 if ( isset( $row->rd_title ) ) {
  88                         return Title::makeTitle( $row->rd_namespace,
  89                                 $row->rd_title, $row->rd_fragment,
  90                                 $row->rd_interwiki
  91                         );
  92                 } else {
  93                         $title = Title::makeTitle( $row->namespace, $row->title );
  94                         $article = WikiPage::factory( $title );
  95                         return $article->getRedirectTarget();
  96                 }
  97         }
  98
  99         function formatResult( $skin, $result ) {
 100                 # Make a link to the redirect itself
 101                 $rd_title = Title::makeTitle( $result->namespace, $result->title );
 102                 $rd_link = Linker::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                         $lang = $this->getLanguage();
 114                         $arr = $lang->getArrow() . $lang->getDirMark();
 115                         $targetLink = Linker::link( $target );
 116                         return "$rd_link $arr $targetLink";
 117                 } else {
 118                         return "<del>$rd_link</del>";
 119                 }
 120         }
 121 }