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