includes/specials/SpecialBrokenRedirects.php

   1 <?php
   2 /**
   3  * Implements Special:Brokenredirects
   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 listing redirects tonon existent page. Those should be
  26  * fixed to point to an existing page.
  27  *
  28  * @ingroup SpecialPage
  29  */
  30 class BrokenRedirectsPage extends PageQueryPage {
  31         var $targets = array();
  32
  33         function getName() {
  34                 return 'BrokenRedirects';
  35         }
  36
  37         function isExpensive( ) { return true; }
  38         function isSyndicated() { return false; }
  39
  40         function getPageHeader( ) {
  41                 return wfMsgExt( 'brokenredirectstext', array( 'parse' ) );
  42         }
  43
  44         function getSQL() {
  45                 $dbr = wfGetDB( DB_SLAVE );
  46                 list( $page, $redirect ) = $dbr->tableNamesN( 'page', 'redirect' );
  47
  48                 $sql = "SELECT 'BrokenRedirects'  AS type,
  49                                 p1.page_namespace AS namespace,
  50                                 p1.page_title     AS title,
  51                                 rd_namespace,
  52                                 rd_title
  53                            FROM $redirect AS rd
  54                       JOIN $page p1 ON (rd.rd_from=p1.page_id)
  55                       LEFT JOIN $page AS p2 ON (rd_namespace=p2.page_namespace AND rd_title=p2.page_title )
  56                                   WHERE rd_namespace >= 0
  57                                     AND p2.page_namespace IS NULL";
  58                 return $sql;
  59         }
  60
  61         function getOrder() {
  62                 return '';
  63         }
  64
  65         function formatResult( $skin, $result ) {
  66                 global $wgUser, $wgContLang, $wgLang;
  67
  68                 $fromObj = Title::makeTitle( $result->namespace, $result->title );
  69                 if ( isset( $result->rd_title ) ) {
  70                         $toObj = Title::makeTitle( $result->rd_namespace, $result->rd_title );
  71                 } else {
  72                         $blinks = $fromObj->getBrokenLinksFrom(); # TODO: check for redirect, not for links
  73                         if ( $blinks ) {
  74                                 $toObj = $blinks[0];
  75                         } else {
  76                                 $toObj = false;
  77                         }
  78                 }
  79
  80                 // $toObj may very easily be false if the $result list is cached
  81                 if ( !is_object( $toObj ) ) {
  82                         return '<del>' . $skin->link( $fromObj ) . '</del>';
  83                 }
  84
  85                 $from = $skin->linkKnown(
  86                         $fromObj,
  87                         null,
  88                         array(),
  89                         array( 'redirect' => 'no' )
  90                 );
  91                 $links = array();
  92                 $links[] = $skin->linkKnown(
  93                         $fromObj,
  94                         wfMsgHtml( 'brokenredirects-edit' ),
  95                         array(),
  96                         array( 'action' => 'edit' )
  97                 );
  98                 $to   = $skin->link(
  99                         $toObj,
 100                         null,
 101                         array(),
 102                         array(),
 103                         array( 'broken' )
 104                 );
 105                 $arr = $wgContLang->getArrow();
 106
 107                 $out = $from . wfMsg( 'word-separator' );
 108
 109                 if( $wgUser->isAllowed( 'delete' ) ) {
 110                         $links[] = $skin->linkKnown(
 111                                 $fromObj,
 112                                 wfMsgHtml( 'brokenredirects-delete' ),
 113                                 array(),
 114                                 array( 'action' => 'delete' )
 115                         );
 116                 }
 117
 118                 $out .= wfMsg( 'parentheses', $wgLang->pipeList( $links ) );
 119                 $out .= " {$arr} {$to}";
 120                 return $out;
 121         }
 122 }
 123
 124 /**
 125  * constructor
 126  */
 127 function wfSpecialBrokenRedirects() {
 128         list( $limit, $offset ) = wfCheckLimits();
 129
 130         $sbr = new BrokenRedirectsPage();
 131
 132         return $sbr->doQuery( $offset, $limit );
 133 }