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<?php
/**
* Fix double redirects.
*
* Copyright © 2011 Ilmari Karonen <nospam@vyznev.net>
* https://www.mediawiki.org/
*
* 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
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* 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
* @author Ilmari Karonen <nospam@vyznev.net>
* @ingroup Maintenance
*/
use MediaWiki\JobQueue\Jobs\DoubleRedirectJob;
use MediaWiki\Maintenance\Maintenance;
use MediaWiki\Title\Title;
// @codeCoverageIgnoreStart
require_once __DIR__ . '/Maintenance.php';
// @codeCoverageIgnoreEnd
/**
* Maintenance script that fixes double redirects.
*
* @ingroup Maintenance
*/
class FixDoubleRedirects extends Maintenance {
public function __construct() {
parent::__construct();
$this->addDescription( 'Script to fix double redirects' );
$this->addOption( 'async', 'Don\'t fix anything directly, just queue the jobs' );
$this->addOption( 'title', 'Fix only redirects pointing to this page', false, true );
$this->addOption( 'dry-run', 'Perform a dry run, fix nothing' );
}
public function execute() {
$async = $this->hasOption( 'async' );
$dryrun = $this->hasOption( 'dry-run' );
if ( $this->hasOption( 'title' ) ) {
$title = Title::newFromText( $this->getOption( 'title' ) );
if ( !$title || !$title->isRedirect() ) {
$this->fatalError( $title->getPrefixedText() . " is not a redirect!\n" );
}
} else {
$title = null;
}
$dbr = $this->getReplicaDB();
// See also SpecialDoubleRedirects
// TODO: support batch querying
$queryBuilder = $dbr->newSelectQueryBuilder()
->select( [
'pa_namespace' => 'pa.page_namespace',
'pa_title' => 'pa.page_title',
'pb_namespace' => 'pb.page_namespace',
'pb_title' => 'pb.page_title',
] )
->from( 'redirect' )
->join( 'page', 'pa', 'rd_from = pa.page_id' )
->join( 'page', 'pb', [ 'rd_namespace = pb.page_namespace', 'rd_title = pb.page_title' ] )
// T42352
->where( [ 'rd_interwiki' => '', 'pb.page_is_redirect' => 1 ] );
if ( $title != null ) {
$queryBuilder->andWhere( [
'pb.page_namespace' => $title->getNamespace(),
'pb.page_title' => $title->getDBkey()
] );
}
$res = $queryBuilder->caller( __METHOD__ )->fetchResultSet();
if ( !$res->numRows() ) {
$this->output( "No double redirects found.\n" );
return;
}
$jobs = [];
$processedTitles = "\n";
$n = 0;
$services = $this->getServiceContainer();
foreach ( $res as $row ) {
$titleA = Title::makeTitle( $row->pa_namespace, $row->pa_title );
$titleB = Title::makeTitle( $row->pb_namespace, $row->pb_title );
if ( !$titleA->canExist() || !$titleB->canExist() ) {
$this->error( "Cannot fix redirect from" .
( $titleA->canExist() ? "" : " invalid" ) . " title " . $titleA->getPrefixedText()
. " to new" .
( $titleB->canExist() ? "" : " invalid" ) . " target " . $titleB->getPrefixedText()
. "\n"
);
continue;
}
$processedTitles .= "* [[$titleA]]\n";
$job = new DoubleRedirectJob(
$titleA,
[
'reason' => 'maintenance',
'redirTitle' => $titleB->getPrefixedDBkey()
],
$services->getRevisionLookup(),
$services->getMagicWordFactory(),
$services->getWikiPageFactory()
);
if ( !$async ) {
$success = ( $dryrun ? true : $job->run() );
if ( !$success ) {
$this->error( "Error fixing " . $titleA->getPrefixedText()
. ": " . $job->getLastError() . "\n" );
}
} else {
$jobs[] = $job;
if ( count( $jobs ) > DoubleRedirectJob::MAX_DR_JOBS_COUNTER ) {
$this->queueJobs( $jobs, $dryrun );
$jobs = [];
}
}
if ( ++$n % 100 == 0 ) {
$this->output( "$n...\n" );
}
}
if ( count( $jobs ) ) {
$this->queueJobs( $jobs, $dryrun );
}
$this->output( "$n double redirects processed" . $processedTitles . "\n" );
}
protected function queueJobs( array $jobs, bool $dryrun = false ) {
$this->output( "Queuing batch of " . count( $jobs ) . " double redirects.\n" );
$this->getServiceContainer()->getJobQueueGroup()->push( $dryrun ? [] : $jobs );
}
}
// @codeCoverageIgnoreStart
$maintClass = FixDoubleRedirects::class;
require_once RUN_MAINTENANCE_IF_MAIN;
// @codeCoverageIgnoreEnd