includes/specials/SpecialBrokenRedirects.php

   1 <?php
   2 /**
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  17  * http://www.gnu.org/copyleft/gpl.html
  18  */
  19
  20 /**
  21  * A special page listing redirects tonon existent page. Those should be
  22  * fixed to point to an existing page.
  23  *
  24  * @file
  25  * @ingroup SpecialPage
  26  */
  27 class BrokenRedirectsPage extends PageQueryPage {
  28         var $targets = array();
  29
  30         function getName() {
  31                 return 'BrokenRedirects';
  32         }
  33
  34         function isExpensive( ) { return true; }
  35         function isSyndicated() { return false; }
  36
  37         function getPageHeader( ) {
  38                 return wfMsgExt( 'brokenredirectstext', array( 'parse' ) );
  39         }
  40
  41         function getSQL() {
  42                 $dbr = wfGetDB( DB_SLAVE );
  43                 list( $page, $redirect ) = $dbr->tableNamesN( 'page', 'redirect' );
  44
  45                 $sql = "SELECT 'BrokenRedirects'  AS type,
  46                                 p1.page_namespace AS namespace,
  47                                 p1.page_title     AS title,
  48                                 rd_namespace,
  49                                 rd_title
  50                            FROM $redirect AS rd
  51                       JOIN $page p1 ON (rd.rd_from=p1.page_id)
  52                       LEFT JOIN $page AS p2 ON (rd_namespace=p2.page_namespace AND rd_title=p2.page_title )
  53                                   WHERE rd_namespace >= 0
  54                                     AND p2.page_namespace IS NULL";
  55                 return $sql;
  56         }
  57
  58         function getOrder() {
  59                 return '';
  60         }
  61
  62         function formatResult( $skin, $result ) {
  63                 global $wgUser, $wgContLang, $wgLang;
  64
  65                 $fromObj = Title::makeTitle( $result->namespace, $result->title );
  66                 if ( isset( $result->rd_title ) ) {
  67                         $toObj = Title::makeTitle( $result->rd_namespace, $result->rd_title );
  68                 } else {
  69                         $blinks = $fromObj->getBrokenLinksFrom(); # TODO: check for redirect, not for links
  70                         if ( $blinks ) {
  71                                 $toObj = $blinks[0];
  72                         } else {
  73                                 $toObj = false;
  74                         }
  75                 }
  76
  77                 // $toObj may very easily be false if the $result list is cached
  78                 if ( !is_object( $toObj ) ) {
  79                         return '<del>' . $skin->link( $fromObj ) . '</del>';
  80                 }
  81
  82                 $from = $skin->linkKnown(
  83                         $fromObj,
  84                         null,
  85                         array(),
  86                         array( 'redirect' => 'no' )
  87                 );
  88                 $links = array();
  89                 $links[] = $skin->linkKnown(
  90                         $fromObj,
  91                         wfMsgHtml( 'brokenredirects-edit' ),
  92                         array(),
  93                         array( 'action' => 'edit' )
  94                 );
  95                 $to   = $skin->link(
  96                         $toObj,
  97                         null,
  98                         array(),
  99                         array(),
 100                         array( 'broken' )
 101                 );
 102                 $arr = $wgContLang->getArrow();
 103
 104                 $out = $from . wfMsg( 'word-separator' );
 105
 106                 if( $wgUser->isAllowed( 'delete' ) ) {
 107                         $links[] = $skin->linkKnown(
 108                                 $fromObj,
 109                                 wfMsgHtml( 'brokenredirects-delete' ),
 110                                 array(),
 111                                 array( 'action' => 'delete' )
 112                         );
 113                 }
 114
 115                 $out .= wfMsg( 'parentheses', $wgLang->pipeList( $links ) );
 116                 $out .= " {$arr} {$to}";
 117                 return $out;
 118         }
 119 }
 120
 121 /**
 122  * constructor
 123  */
 124 function wfSpecialBrokenRedirects() {
 125         list( $limit, $offset ) = wfCheckLimits();
 126
 127         $sbr = new BrokenRedirectsPage();
 128
 129         return $sbr->doQuery( $offset, $limit );
 130 }