includes/SpecialDoubleRedirects.php

   1 <?php
   2 /**
   3  *
   4  * @package MediaWiki
   5  * @subpackage SpecialPage
   6  */
   7
   8 /**
   9  *
  10  */
  11 require_once('QueryPage.php');
  12
  13 /**
  14  *
  15  * @package MediaWiki
  16  * @subpackage SpecialPage
  17  */
  18 class DoubleRedirectsPage extends PageQueryPage {
  19
  20         function getName() {
  21                 return 'DoubleRedirects';
  22         }
  23
  24         function isExpensive( ) { return true; }
  25         function isSyndicated() { return false; }
  26
  27         function getPageHeader( ) {
  28                 #FIXME : probably need to add a backlink to the maintenance page.
  29                 return '<p>'.wfMsg("doubleredirectstext")."</p><br />\n";
  30         }
  31
  32         function getSQLText( &$dbr, $namespace = null, $title = null ) {
  33
  34                 extract( $dbr->tableNames( 'page', 'pagelinks' ) );
  35
  36                 $limitToTitle = !( $namespace === null && $title === null );
  37                 $sql = $limitToTitle ? "SELECT" : "SELECT 'DoubleRedirects' as type," ;
  38                 $sql .=
  39                          " pa.page_namespace as namespace, pa.page_title as title," .
  40                          " pb.page_namespace as nsb, pb.page_title as tb," .
  41                          " pc.page_namespace as nsc, pc.page_title as tc" .
  42                    " FROM $pagelinks AS la, $pagelinks AS lb, $page AS pa, $page AS pb, $page AS pc" .
  43                    " WHERE pa.page_is_redirect=1 AND pb.page_is_redirect=1" .
  44                          " AND la.pl_from=pa.page_id" .
  45                          " AND la.pl_namespace=pb.page_namespace" .
  46                          " AND la.pl_title=pb.page_title" .
  47                          " AND lb.pl_from=pb.page_id" .
  48                          " AND lb.pl_namespace=pc.page_namespace" .
  49                          " AND lb.pl_title=pc.page_title";
  50
  51                 if( $limitToTitle ) {
  52                         $encTitle = $dbr->addQuotes( $title );
  53                         $sql .= " AND pa.page_namespace=$namespace" .
  54                                         " AND pa.page_title=$encTitle";
  55                 }
  56
  57                 return $sql;
  58         }
  59
  60         function getSQL() {
  61                 $dbr =& wfGetDB( DB_SLAVE );
  62                 return $this->getSQLText( $dbr );
  63         }
  64
  65         function getOrder() {
  66                 return '';
  67         }
  68
  69         function formatResult( $skin, $result ) {
  70                 global $wgContLang;
  71
  72                 $fname = 'DoubleRedirectsPage::formatResult';
  73                 $titleA = Title::makeTitle( $result->namespace, $result->title );
  74
  75                 if ( $result && !isset( $result->nsb ) ) {
  76                         $dbr =& wfGetDB( DB_SLAVE );
  77                         $sql = $this->getSQLText( $dbr, $result->namespace, $result->title );
  78                         $res = $dbr->query( $sql, $fname );
  79                         if ( $res ) {
  80                                 $result = $dbr->fetchObject( $res );
  81                                 $dbr->freeResult( $res );
  82                         }
  83                 }
  84                 if ( !$result ) {
  85                         return '';
  86                 }
  87
  88                 $titleB = Title::makeTitle( $result->nsb, $result->tb );
  89                 $titleC = Title::makeTitle( $result->nsc, $result->tc );
  90
  91                 $linkA = $skin->makeKnownLinkObj( $titleA,'', 'redirect=no' );
  92                 $edit = $skin->makeBrokenLinkObj( $titleA, "(".wfMsg("qbedit").")" , 'redirect=no');
  93                 $linkB = $skin->makeKnownLinkObj( $titleB, '', 'redirect=no' );
  94                 $linkC = $skin->makeKnownLinkObj( $titleC );
  95                 $arr = $wgContLang->isRTL() ? '&larr;' : '&rarr;';
  96
  97                 return( "{$linkA} {$edit} {$arr} {$linkB} {$arr} {$linkC}" );
  98         }
  99 }
 100
 101 /**
 102  * constructor
 103  */
 104 function wfSpecialDoubleRedirects() {
 105         list( $limit, $offset ) = wfCheckLimits();
 106
 107         $sdr = new DoubleRedirectsPage();
 108
 109         return $sdr->doQuery( $offset, $limit );
 110
 111 }
 112 ?>