00001 <?php 00012 class DoubleRedirectsPage extends PageQueryPage { 00013 00014 function getName() { 00015 return 'DoubleRedirects'; 00016 } 00017 00018 function isExpensive( ) { return true; } 00019 function isSyndicated() { return false; } 00020 00021 function getPageHeader( ) { 00022 return wfMsgExt( 'doubleredirectstext', array( 'parse' ) ); 00023 } 00024 00025 function getSQLText( &$dbr, $namespace = null, $title = null ) { 00026 00027 list( $page, $redirect ) = $dbr->tableNamesN( 'page', 'redirect' ); 00028 00029 $limitToTitle = !( $namespace === null && $title === null ); 00030 $sql = $limitToTitle ? "SELECT" : "SELECT 'DoubleRedirects' as type," ; 00031 $sql .= 00032 " pa.page_namespace as namespace, pa.page_title as title," . 00033 " pb.page_namespace as nsb, pb.page_title as tb," . 00034 " pc.page_namespace as nsc, pc.page_title as tc" . 00035 " FROM $redirect AS ra, $redirect AS rb, $page AS pa, $page AS pb, $page AS pc" . 00036 " WHERE ra.rd_from=pa.page_id" . 00037 " AND ra.rd_namespace=pb.page_namespace" . 00038 " AND ra.rd_title=pb.page_title" . 00039 " AND rb.rd_from=pb.page_id" . 00040 " AND rb.rd_namespace=pc.page_namespace" . 00041 " AND rb.rd_title=pc.page_title"; 00042 00043 if( $limitToTitle ) { 00044 $encTitle = $dbr->addQuotes( $title ); 00045 $sql .= " AND pa.page_namespace=$namespace" . 00046 " AND pa.page_title=$encTitle"; 00047 } 00048 00049 return $sql; 00050 } 00051 00052 function getSQL() { 00053 $dbr = wfGetDB( DB_SLAVE ); 00054 return $this->getSQLText( $dbr ); 00055 } 00056 00057 function getOrder() { 00058 return ''; 00059 } 00060 00061 function formatResult( $skin, $result ) { 00062 global $wgContLang; 00063 00064 $fname = 'DoubleRedirectsPage::formatResult'; 00065 $titleA = Title::makeTitle( $result->namespace, $result->title ); 00066 00067 if ( $result && !isset( $result->nsb ) ) { 00068 $dbr = wfGetDB( DB_SLAVE ); 00069 $sql = $this->getSQLText( $dbr, $result->namespace, $result->title ); 00070 $res = $dbr->query( $sql, $fname ); 00071 if ( $res ) { 00072 $result = $dbr->fetchObject( $res ); 00073 $dbr->freeResult( $res ); 00074 } 00075 } 00076 if ( !$result ) { 00077 return '<s>' . $skin->makeLinkObj( $titleA, '', 'redirect=no' ) . '</s>'; 00078 } 00079 00080 $titleB = Title::makeTitle( $result->nsb, $result->tb ); 00081 $titleC = Title::makeTitle( $result->nsc, $result->tc ); 00082 00083 $linkA = $skin->makeKnownLinkObj( $titleA, '', 'redirect=no' ); 00084 $edit = $skin->makeBrokenLinkObj( $titleA, "(".wfMsg("qbedit").")" , 'redirect=no'); 00085 $linkB = $skin->makeKnownLinkObj( $titleB, '', 'redirect=no' ); 00086 $linkC = $skin->makeKnownLinkObj( $titleC ); 00087 $arr = $wgContLang->getArrow() . $wgContLang->getDirMark(); 00088 00089 return( "{$linkA} {$edit} {$arr} {$linkB} {$arr} {$linkC}" ); 00090 } 00091 } 00092 00096 function wfSpecialDoubleRedirects() { 00097 list( $limit, $offset ) = wfCheckLimits(); 00098 00099 $sdr = new DoubleRedirectsPage(); 00100 00101 return $sdr->doQuery( $offset, $limit ); 00102 00103 }