includes/SpecialDoubleRedirects.php

   1 <?php
   2 /**
   3  *
   4  * @package MediaWiki
   5  * @subpackage SpecialPage
   6  */
   7
   8 /**
   9  *
  10  * @package MediaWiki
  11  * @subpackage SpecialPage
  12  */
  13 class DoubleRedirectsPage extends PageQueryPage {
  14
  15         function getName() {
  16                 return 'DoubleRedirects';
  17         }
  18
  19         function isExpensive( ) { return true; }
  20         function isSyndicated() { return false; }
  21
  22         function getPageHeader( ) {
  23                 #FIXME : probably need to add a backlink to the maintenance page.
  24                 return '<p>'.wfMsg("doubleredirectstext")."</p><br />\n";
  25         }
  26
  27         function getSQLText( &$dbr, $namespace = null, $title = null ) {
  28
  29                 list( $page, $pagelinks ) = $dbr->tableNamesN( 'page', 'pagelinks' );
  30
  31                 $limitToTitle = !( $namespace === null && $title === null );
  32                 $sql = $limitToTitle ? "SELECT" : "SELECT 'DoubleRedirects' as type," ;
  33                 $sql .=
  34                          " pa.page_namespace as namespace, pa.page_title as title," .
  35                          " pb.page_namespace as nsb, pb.page_title as tb," .
  36                          " pc.page_namespace as nsc, pc.page_title as tc" .
  37                    " FROM $pagelinks AS la, $pagelinks AS lb, $page AS pa, $page AS pb, $page AS pc" .
  38                    " WHERE pa.page_is_redirect=1 AND pb.page_is_redirect=1" .
  39                          " AND la.pl_from=pa.page_id" .
  40                          " AND la.pl_namespace=pb.page_namespace" .
  41                          " AND la.pl_title=pb.page_title" .
  42                          " AND lb.pl_from=pb.page_id" .
  43                          " AND lb.pl_namespace=pc.page_namespace" .
  44                          " AND lb.pl_title=pc.page_title";
  45
  46                 if( $limitToTitle ) {
  47                         $encTitle = $dbr->addQuotes( $title );
  48                         $sql .= " AND pa.page_namespace=$namespace" .
  49                                         " AND pa.page_title=$encTitle";
  50                 }
  51
  52                 return $sql;
  53         }
  54
  55         function getSQL() {
  56                 $dbr =& wfGetDB( DB_SLAVE );
  57                 return $this->getSQLText( $dbr );
  58         }
  59
  60         function getOrder() {
  61                 return '';
  62         }
  63
  64         function formatResult( $skin, $result ) {
  65                 global $wgContLang;
  66
  67                 $fname = 'DoubleRedirectsPage::formatResult';
  68                 $titleA = Title::makeTitle( $result->namespace, $result->title );
  69
  70                 if ( $result && !isset( $result->nsb ) ) {
  71                         $dbr =& wfGetDB( DB_SLAVE );
  72                         $sql = $this->getSQLText( $dbr, $result->namespace, $result->title );
  73                         $res = $dbr->query( $sql, $fname );
  74                         if ( $res ) {
  75                                 $result = $dbr->fetchObject( $res );
  76                                 $dbr->freeResult( $res );
  77                         }
  78                 }
  79                 if ( !$result ) {
  80                         return '';
  81                 }
  82
  83                 $titleB = Title::makeTitle( $result->nsb, $result->tb );
  84                 $titleC = Title::makeTitle( $result->nsc, $result->tc );
  85
  86                 $linkA = $skin->makeKnownLinkObj( $titleA,'', 'redirect=no' );
  87                 $edit = $skin->makeBrokenLinkObj( $titleA, "(".wfMsg("qbedit").")" , 'redirect=no');
  88                 $linkB = $skin->makeKnownLinkObj( $titleB, '', 'redirect=no' );
  89                 $linkC = $skin->makeKnownLinkObj( $titleC );
  90                 $arr = $wgContLang->getArrow() . $wgContLang->getDirMark();
  91
  92                 return( "{$linkA} {$edit} {$arr} {$linkB} {$arr} {$linkC}" );
  93         }
  94 }
  95
  96 /**
  97  * constructor
  98  */
  99 function wfSpecialDoubleRedirects() {
 100         list( $limit, $offset ) = wfCheckLimits();
 101
 102         $sdr = new DoubleRedirectsPage();
 103
 104         return $sdr->doQuery( $offset, $limit );
 105
 106 }
 107 ?>