MediaWiki 1.14.0

[autoinstallsdev/mediawiki.git] / includes / specials / SpecialDoubleRedirects.php

diff --git a/includes/specials/SpecialDoubleRedirects.php b/includes/specials/SpecialDoubleRedirects.php
new file mode 100644 (file)
index 0000000..b1bad0c
--- /dev/null
+++ b/includes/specials/SpecialDoubleRedirects.php
@@ -0,0 +1,103 @@
+<?php
+/**
+ * @file
+ * @ingroup SpecialPage
+ */
+
+/**
+ * A special page listing redirects to redirecting page.
+ * The software will automatically not follow double redirects, to prevent loops.
+ * @ingroup SpecialPage
+ */
+class DoubleRedirectsPage extends PageQueryPage {
+
+       function getName() {
+               return 'DoubleRedirects';
+       }
+
+       function isExpensive( ) { return true; }
+       function isSyndicated() { return false; }
+
+       function getPageHeader( ) {
+               return wfMsgExt( 'doubleredirectstext', array( 'parse' ) );
+       }
+
+       function getSQLText( &$dbr, $namespace = null, $title = null ) {
+
+               list( $page, $redirect ) = $dbr->tableNamesN( 'page', 'redirect' );
+
+               $limitToTitle = !( $namespace === null && $title === null );
+               $sql = $limitToTitle ? "SELECT" : "SELECT 'DoubleRedirects' as type," ;
+               $sql .=
+                        " pa.page_namespace as namespace, pa.page_title as title," .
+                        " pb.page_namespace as nsb, pb.page_title as tb," .
+                        " pc.page_namespace as nsc, pc.page_title as tc" .
+                  " FROM $redirect AS ra, $redirect AS rb, $page AS pa, $page AS pb, $page AS pc" .
+                  " WHERE ra.rd_from=pa.page_id" .
+                        " AND ra.rd_namespace=pb.page_namespace" .
+                        " AND ra.rd_title=pb.page_title" .
+                        " AND rb.rd_from=pb.page_id" .
+                        " AND rb.rd_namespace=pc.page_namespace" .
+                        " AND rb.rd_title=pc.page_title";
+
+               if( $limitToTitle ) {
+                       $encTitle = $dbr->addQuotes( $title );
+                       $sql .= " AND pa.page_namespace=$namespace" .
+                                       " AND pa.page_title=$encTitle";
+               }
+
+               return $sql;
+       }
+
+       function getSQL() {
+               $dbr = wfGetDB( DB_SLAVE );
+               return $this->getSQLText( $dbr );
+       }
+
+       function getOrder() {
+               return '';
+       }
+
+       function formatResult( $skin, $result ) {
+               global $wgContLang;
+
+               $fname = 'DoubleRedirectsPage::formatResult';
+               $titleA = Title::makeTitle( $result->namespace, $result->title );
+
+               if ( $result && !isset( $result->nsb ) ) {
+                       $dbr = wfGetDB( DB_SLAVE );
+                       $sql = $this->getSQLText( $dbr, $result->namespace, $result->title );
+                       $res = $dbr->query( $sql, $fname );
+                       if ( $res ) {
+                               $result = $dbr->fetchObject( $res );
+                               $dbr->freeResult( $res );
+                       }
+               }
+               if ( !$result ) {
+                       return '<s>' . $skin->makeLinkObj( $titleA, '', 'redirect=no' ) . '</s>';
+               }
+
+               $titleB = Title::makeTitle( $result->nsb, $result->tb );
+               $titleC = Title::makeTitle( $result->nsc, $result->tc );
+
+               $linkA = $skin->makeKnownLinkObj( $titleA, '', 'redirect=no' );
+               $edit = $skin->makeBrokenLinkObj( $titleA, "(".wfMsg("qbedit").")" , 'redirect=no');
+               $linkB = $skin->makeKnownLinkObj( $titleB, '', 'redirect=no' );
+               $linkC = $skin->makeKnownLinkObj( $titleC );
+               $arr = $wgContLang->getArrow() . $wgContLang->getDirMark();
+
+               return( "{$linkA} {$edit} {$arr} {$linkB} {$arr} {$linkC}" );
+       }
+}
+
+/**
+ * constructor
+ */
+function wfSpecialDoubleRedirects() {
+       list( $limit, $offset ) = wfCheckLimits();
+
+       $sdr = new DoubleRedirectsPage();
+
+       return $sdr->doQuery( $offset, $limit );
+
+}