<?php
/**
+ * Implements Special:DoubleRedirects
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ * @ingroup SpecialPage
*/
/**
* A special page listing redirects to redirecting page.
* The software will automatically not follow double redirects, to prevent loops.
*
- * @file
* @ingroup SpecialPage
*/
-class DoubleRedirectsPage extends PageQueryPage {
+class DoubleRedirectsPage extends QueryPage {
- function getName() {
- return 'DoubleRedirects';
+ function __construct( $name = 'DoubleRedirects' ) {
+ parent::__construct( $name );
}
- function isExpensive( ) { return true; }
- function isSyndicated() { return false; }
+ function isExpensive() {
+ return true;
+ }
- function getPageHeader( ) {
- return wfMsgExt( 'doubleredirectstext', array( 'parse' ) );
+ function isSyndicated() {
+ return false;
}
- function getSQLText( &$dbr, $namespace = null, $title = null ) {
+ function sortDescending() {
+ return false;
+ }
- list( $page, $redirect ) = $dbr->tableNamesN( 'page', 'redirect' );
+ function getPageHeader() {
+ return $this->msg( 'doubleredirectstext' )->parseAsBlock();
+ }
+ function reallyGetQueryInfo( $namespace = null, $title = null ) {
$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";
+ $retval = array (
+ 'tables' => array (
+ 'ra' => 'redirect',
+ 'rb' => 'redirect',
+ 'pa' => 'page',
+ 'pb' => 'page'
+ ),
+ 'fields' => array(
+ 'namespace' => 'pa.page_namespace',
+ 'title' => 'pa.page_title',
+ 'value' => 'pa.page_title',
+
+ 'nsb' => 'pb.page_namespace',
+ 'tb' => 'pb.page_title',
+
+ // Select fields from redirect instead of page. Because there may
+ // not actually be a page table row for this target (e.g. for interwiki redirects)
+ 'nsc' => 'rb.rd_namespace',
+ 'tc' => 'rb.rd_title',
+ 'iwc' => 'rb.rd_interwiki',
+ ),
+ 'conds' => array(
+ 'ra.rd_from = pa.page_id',
+
+ // Filter out redirects where the target goes interwiki (bug 40353).
+ // This isn't an optimization, it is required for correct results,
+ // otherwise a non-double redirect like Bar -> w:Foo will show up
+ // like "Bar -> Foo -> w:Foo".
+
+ // Need to check both NULL and "" for some reason,
+ // apparently either can be stored for non-iw entries.
+ '(ra.rd_interwiki IS NULL OR ra.rd_interwiki = "")',
+
+ 'pb.page_namespace = ra.rd_namespace',
+ 'pb.page_title = ra.rd_title',
+
+ 'rb.rd_from = pb.page_id',
+ )
+ );
+ if ( $limitToTitle ) {
+ $retval['conds']['pa.page_namespace'] = $namespace;
+ $retval['conds']['pa.page_title'] = $title;
}
-
- return $sql;
+ return $retval;
}
- function getSQL() {
- $dbr = wfGetDB( DB_SLAVE );
- return $this->getSQLText( $dbr );
+ function getQueryInfo() {
+ return $this->reallyGetQueryInfo();
}
- function getOrder() {
- return '';
+ function getOrderFields() {
+ return array ( 'ra.rd_namespace', 'ra.rd_title' );
}
function formatResult( $skin, $result ) {
- global $wgContLang;
-
- $fname = 'DoubleRedirectsPage::formatResult';
$titleA = Title::makeTitle( $result->namespace, $result->title );
+ // If only titleA is in the query, it means this came from
+ // querycache (which only saves 3 columns).
+ // That does save the bulk of the query cost, but now we need to
+ // get a little more detail about each individual entry quickly
+ // using the filter of reallyGetQueryInfo.
if ( $result && !isset( $result->nsb ) ) {
$dbr = wfGetDB( DB_SLAVE );
- $sql = $this->getSQLText( $dbr, $result->namespace, $result->title );
- $res = $dbr->query( $sql, $fname );
+ $qi = $this->reallyGetQueryInfo( $result->namespace,
+ $result->title );
+ $res = $dbr->select($qi['tables'], $qi['fields'],
+ $qi['conds'], __METHOD__ );
if ( $res ) {
$result = $dbr->fetchObject( $res );
- $dbr->freeResult( $res );
}
}
if ( !$result ) {
- return '<del>' . $skin->link( $titleA, null, array(), array( 'redirect' => 'no' ) ) . '</del>';
+ return '<del>' . Linker::link( $titleA, null, array(), array( 'redirect' => 'no' ) ) . '</del>';
}
$titleB = Title::makeTitle( $result->nsb, $result->tb );
- $titleC = Title::makeTitle( $result->nsc, $result->tc );
+ $titleC = Title::makeTitle( $result->nsc, $result->tc, '', $result->iwc );
- $linkA = $skin->linkKnown(
+ $linkA = Linker::linkKnown(
$titleA,
null,
array(),
array( 'redirect' => 'no' )
);
- $edit = $skin->linkKnown(
+
+ $edit = Linker::linkKnown(
$titleA,
- wfMsgExt( 'parentheses', array( 'escape' ), wfMsg( 'editlink' ) ),
+ $this->msg( 'parentheses', $this->msg( 'editlink' )->text() )->escaped(),
array(),
array(
'redirect' => 'no',
'action' => 'edit'
)
);
- $linkB = $skin->linkKnown(
+
+ $linkB = Linker::linkKnown(
$titleB,
null,
array(),
array( 'redirect' => 'no' )
);
- $linkC = $skin->linkKnown( $titleC );
- $arr = $wgContLang->getArrow() . $wgContLang->getDirMark();
- return( "{$linkA} {$edit} {$arr} {$linkB} {$arr} {$linkC}" );
- }
-}
+ $linkC = Linker::linkKnown( $titleC );
-/**
- * constructor
- */
-function wfSpecialDoubleRedirects() {
- list( $limit, $offset ) = wfCheckLimits();
-
- $sdr = new DoubleRedirectsPage();
-
- return $sdr->doQuery( $offset, $limit );
+ $lang = $this->getLanguage();
+ $arr = $lang->getArrow() . $lang->getDirMark();
+ return( "{$linkA} {$edit} {$arr} {$linkB} {$arr} {$linkC}" );
+ }
}
dépôts / lhc / web / wiklou.git / blobdiff