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 getSQL() {
  33                 $dbr =& wfGetDB( DB_SLAVE );
  34                 extract( $dbr->tableNames( 'page', 'pagelinks' ) );
  35
  36                 $sql = "SELECT 'DoubleRedirects' as type," .
  37                          " pa.page_namespace as namespace, pa.page_title as title," .
  38                              " pb.page_namespace as nsb, pb.page_title as tb," .
  39                                  " pc.page_namespace as nsc, pc.page_title as tc" .
  40                            " FROM $pagelinks AS la, $pagelinks AS lb, $page AS pa, $page AS pb, $page AS pc" .
  41                            " WHERE pa.page_is_redirect=1 AND pb.page_is_redirect=1" .
  42                              " AND la.pl_from=pa.page_id" .
  43                                  " AND la.pl_namespace=pb.page_namespace" .
  44                                  " AND la.pl_title=pb.page_title" .
  45                                  " AND lb.pl_from=pb.page_id" .
  46                                  " AND lb.pl_namespace=pc.page_namespace" .
  47                                  " AND lb.pl_title=pc.page_title";
  48                 return $sql;
  49         }
  50
  51         function getOrder() {
  52                 return '';
  53         }
  54
  55         function formatResult( $skin, $result ) {
  56                 $fname = 'DoubleRedirectsPage::formatResult';
  57                 $titleA = Title::makeTitle( $result->namespace, $result->title );
  58
  59                 if ( $result && !isset( $result->nsb ) ) {
  60                         $dbr =& wfGetDB( DB_SLAVE );
  61                         extract( $dbr->tableNames( 'page', 'pagelinks' ) );
  62                         $encTitle = $dbr->addQuotes( $result->title );
  63
  64                         $sql = "SELECT pa.page_namespace as namespace, pa.page_title as title," .
  65                                          " pb.page_namespace as nsb, pb.page_title as tb," .
  66                                          " pc.page_namespace as nsc, pc.page_title as tc" .
  67                                    " FROM $pagelinks AS la, $pagelinks AS lb, $page AS pa, $page AS pb, $page AS pc" .
  68                                    " WHERE pa.page_is_redirect=1 AND pb.page_is_redirect=1" .
  69                                          " AND la.pl_from=pa.page_id" .
  70                                          " AND la.pl_namespace=pb.page_namespace" .
  71                                          " AND la.pl_title=pb.page_title" .
  72                                          " AND lb.pl_from=pb.page_id" .
  73                                          " AND lb.pl_namespace=pc.page_namespace" .
  74                                          " AND lb.pl_title=pc.page_title" .
  75                                          " AND pa.page_namespace={$result->namespace}" .
  76                                          " AND pa.page_title=$encTitle";
  77                         $res = $dbr->query( $sql, $fname );
  78                         if ( $res ) {
  79                                 $result = $dbr->fetchObject( $res );
  80                         }
  81                 }
  82                 if ( !$result ) {
  83                         return '';
  84                 }
  85
  86                 $titleB = Title::makeTitle( $result->nsb, $result->tb );
  87                 $titleC = Title::makeTitle( $result->nsc, $result->tc );
  88
  89                 $linkA = $skin->makeKnownLinkObj( $titleA,'', 'redirect=no' );
  90                 $edit = $skin->makeBrokenLinkObj( $titleA, "(".wfMsg("qbedit").")" , 'redirect=no');
  91                 $linkB = $skin->makeKnownLinkObj( $titleB, '', 'redirect=no' );
  92                 $linkC = $skin->makeKnownLinkObj( $titleC );
  93
  94                 return "$linkA $edit &rarr; $linkB &rarr; $linkC";
  95         }
  96 }
  97
  98 /**
  99  * constructor
 100  */
 101 function wfSpecialDoubleRedirects() {
 102         list( $limit, $offset ) = wfCheckLimits();
 103
 104         $sdr = new DoubleRedirectsPage();
 105
 106         return $sdr->doQuery( $offset, $limit );
 107
 108 }
 109 ?>