304 lines
11 KiB
PHP
304 lines
11 KiB
PHP
<?php
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/**
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* Clean up broken, unparseable titles.
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*
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* Copyright © 2005 Brooke Vibber <bvibber@wikimedia.org>
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* https://www.mediawiki.org/
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* http://www.gnu.org/copyleft/gpl.html
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*
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* @file
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* @author Brooke Vibber <bvibber@wikimedia.org>
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* @ingroup Maintenance
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*/
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use MediaWiki\Title\Title;
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use Wikimedia\Rdbms\IDBAccessObject;
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// @codeCoverageIgnoreStart
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require_once __DIR__ . '/TableCleanup.php';
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// @codeCoverageIgnoreEnd
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/**
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* Maintenance script to clean up broken, unparseable titles.
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*
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* @ingroup Maintenance
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*/
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class TitleCleanup extends TableCleanup {
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private string $prefix;
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public function __construct() {
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parent::__construct();
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$this->addDescription( 'Script to clean up broken, unparseable titles' );
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$this->addOption( 'prefix', "Broken pages will be renamed to titles with " .
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"<prefix> prepended before the article name. Defaults to 'Broken'", false, true );
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$this->setBatchSize( 1000 );
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}
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/**
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* @inheritDoc
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*/
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public function execute() {
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$this->prefix = $this->getOption( 'prefix', 'Broken' ) . "/";
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// Make sure the prefix itself is a valid title now
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// rather than spewing errors for every page being cleaned up
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// if it's not (We assume below that concatenating the prefix to a title leaves it in NS0)
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// The trailing slash above ensures that concatenating the title to something
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// can't turn it into a namespace or interwiki
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$title = Title::newFromText( $this->prefix );
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if ( !$title || !$title->canExist() || $title->getInterwiki() || $title->getNamespace() !== 0 ) {
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$this->fatalError( "Invalid prefix {$this->prefix}. Must be a valid mainspace title." );
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}
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parent::execute();
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}
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/**
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* @param stdClass $row
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*/
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protected function processRow( $row ) {
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$display = Title::makeName( $row->page_namespace, $row->page_title );
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$verified = $this->getServiceContainer()->getContentLanguage()->normalize( $display );
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$title = Title::newFromText( $verified );
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if ( $title !== null
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&& $title->canExist()
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&& $title->getNamespace() == $row->page_namespace
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&& $title->getDBkey() === $row->page_title
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) {
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// all is fine
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$this->progress( 0 );
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return;
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}
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if ( $row->page_namespace == NS_FILE && $this->fileExists( $row->page_title ) ) {
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$this->output( "file $row->page_title needs cleanup, please run cleanupImages.php.\n" );
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$this->progress( 0 );
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} elseif ( $title === null ) {
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$this->output( "page $row->page_id ($display) is illegal.\n" );
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$this->moveIllegalPage( $row );
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$this->progress( 1 );
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} else {
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$this->output( "page $row->page_id ($display) doesn't match self.\n" );
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$this->moveInconsistentPage( $row, $title );
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$this->progress( 1 );
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}
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}
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/**
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* @param string $name
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* @return bool
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*/
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protected function fileExists( $name ) {
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// XXX: Doesn't actually check for file existence, just presence of image record.
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// This is reasonable, since cleanupImages.php only iterates over the image table.
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$dbr = $this->getReplicaDB();
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$row = $dbr->newSelectQueryBuilder()
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->select( '*' )
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->from( 'image' )
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->where( [ 'img_name' => $name ] )
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->caller( __METHOD__ )
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->fetchRow();
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return $row !== false;
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}
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/**
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* @param stdClass $row
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*/
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protected function moveIllegalPage( $row ) {
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$legalChars = Title::legalChars();
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$legalizedUnprefixed = preg_replace_callback( "/([^$legalChars])/",
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[ $this, 'hexChar' ],
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$row->page_title );
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if ( $legalizedUnprefixed == '.' ) {
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$legalizedUnprefixed = '(dot)';
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}
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if ( $legalizedUnprefixed == '_' ) {
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$legalizedUnprefixed = '(space)';
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}
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$ns = (int)$row->page_namespace;
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$title = null;
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// Try to move "Talk:Project:Foo" -> "Project talk:Foo"
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if ( $ns === 1 ) {
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$subjectTitle = Title::newFromText( $legalizedUnprefixed );
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if ( $subjectTitle && !$subjectTitle->isTalkPage() ) {
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$talkTitle = $subjectTitle->getTalkPageIfDefined();
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if ( $talkTitle !== null && !$talkTitle->exists() ) {
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$ns = $talkTitle->getNamespace();
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$title = $talkTitle;
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}
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}
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}
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if ( $title === null ) {
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// Not a talk page or that didn't work
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// move any other broken pages to the main namespace so they can be found together
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if ( $ns !== 0 ) {
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$namespaceInfo = $this->getServiceContainer()->getNamespaceInfo();
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$namespaceName = $namespaceInfo->getCanonicalName( $ns );
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if ( $namespaceName === false ) {
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$namespaceName = "NS$ns"; // Fallback for unknown namespaces
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}
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$ns = 0;
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$legalizedUnprefixed = "$namespaceName:$legalizedUnprefixed";
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}
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$title = Title::newFromText( $this->prefix . $legalizedUnprefixed );
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}
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if ( $title === null ) {
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// It's still not a valid title, try again with a much smaller
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// allowed character set. This will mangle any titles with non-ASCII
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// characters, but if we don't do this the result will be
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// falling back to the Broken/id:foo failsafe below which is worse
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$legalizedUnprefixed = preg_replace_callback( '!([^A-Za-z0-9_:\\-])!',
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[ $this, 'hexChar' ],
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$legalizedUnprefixed
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);
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$title = Title::newFromText( $this->prefix . $legalizedUnprefixed );
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}
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if ( $title === null ) {
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// Oh well, we tried
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$clean = $this->prefix . 'id:' . $row->page_id;
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$legalized = $this->prefix . $legalizedUnprefixed;
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$this->output( "Couldn't legalize; form '$legalized' still invalid; using '$clean'\n" );
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$title = Title::newFromText( $clean );
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} elseif ( $title->exists( IDBAccessObject::READ_LATEST ) ) {
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$clean = $this->prefix . 'id:' . $row->page_id;
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$conflict = $title->getDBKey();
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$this->output( "Legalized for '$conflict' exists; using '$clean'\n" );
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$title = Title::newFromText( $clean );
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}
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if ( !$title || $title->exists( IDBAccessObject::READ_LATEST ) ) {
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// This can happen in corner cases like if numbers are made not valid
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// title characters using the (deprecated) $wgLegalTitleChars or
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// a 'Broken/id:foo' title already exists
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$this->error( "Destination page {$title->getText()} is invalid or already exists, skipping." );
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return;
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}
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$dest = $title->getDBkey();
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if ( $this->dryrun ) {
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$this->output( "DRY RUN: would rename $row->page_id ($row->page_namespace," .
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"'$row->page_title') to ($ns,'$dest')\n" );
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} else {
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$this->output( "renaming $row->page_id ($row->page_namespace," .
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"'$row->page_title') to ($ns,'$dest')\n" );
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$this->getPrimaryDB()
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->newUpdateQueryBuilder()
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->update( 'page' )
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->set( [ 'page_title' => $dest, 'page_namespace' => $ns ] )
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->where( [ 'page_id' => $row->page_id ] )
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->caller( __METHOD__ )->execute();
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}
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}
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/**
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* @param stdClass $row
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* @param Title $title
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*/
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protected function moveInconsistentPage( $row, Title $title ) {
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$titleImpossible = $title->getInterwiki() || !$title->canExist();
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if ( $title->exists( IDBAccessObject::READ_LATEST ) || $titleImpossible ) {
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if ( $titleImpossible ) {
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$prior = $title->getPrefixedDBkey();
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} else {
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$prior = $title->getDBkey();
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}
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$ns = (int)$row->page_namespace;
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# If a page is saved in the main namespace with a namespace prefix then try to move it into
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# that namespace. If there's no conflict then it will succeed. Otherwise it will hit the condition
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# } else if ($ns !== 0) { and be moved to Broken/Namespace:Title
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# whereas without this check it would just go to Broken/Title
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if ( $ns === 0 ) {
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$ns = $title->getNamespace();
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}
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# Old cleanupTitles could move articles there. See T25147.
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# or a page could be stored as (0, "Special:Foo") in which case the $titleImpossible
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# condition would be true and we've already added a prefix so pretend we're in mainspace
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# and don't add another
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if ( $ns < 0 ) {
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$ns = 0;
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}
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# Namespace which no longer exists. Put the page in the main namespace
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# since we don't have any idea of the old namespace name. See T70501.
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# We build the new title ourself rather than relying on getDBKey() because
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# that will return Special:BadTitle
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$namespaceInfo = $this->getServiceContainer()->getNamespaceInfo();
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if ( !$namespaceInfo->exists( $ns ) ) {
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$clean = "{$this->prefix}NS$ns:$row->page_title";
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$ns = 0;
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} elseif ( !$titleImpossible && !$title->exists( IDBAccessObject::READ_LATEST ) ) {
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// Looks like the current title, after cleaning it up, is valid and available
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$clean = $prior;
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} elseif ( $ns !== 0 ) {
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// Put all broken pages in the main namespace so that they can be found via Special:PrefixIndex
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$nsName = $namespaceInfo->getCanonicalName( $ns );
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$clean = "{$this->prefix}$nsName:{$prior}";
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$ns = 0;
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} else {
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$clean = $this->prefix . $prior;
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}
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$verified = Title::makeTitleSafe( $ns, $clean );
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if ( !$verified || $verified->exists( IDBAccessObject::READ_LATEST ) ) {
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$lastResort = "{$this->prefix}id: {$row->page_id}";
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$this->output( "Couldn't legalize; form '$clean' exists; using '$lastResort'\n" );
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$verified = Title::makeTitleSafe( $ns, $lastResort );
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if ( !$verified || $verified->exists( IDBAccessObject::READ_LATEST ) ) {
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// This can happen in corner cases like if numbers are made not valid
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// title characters using the (deprecated) $wgLegalTitleChars or
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// a 'Broken/id:foo' title already exists
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$this->error( "Destination page $lastResort invalid or already exists." );
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return;
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}
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}
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$title = $verified;
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}
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$ns = $title->getNamespace();
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$dest = $title->getDBkey();
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if ( $this->dryrun ) {
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$this->output( "DRY RUN: would rename $row->page_id ($row->page_namespace," .
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"'$row->page_title') to ($ns,'$dest')\n" );
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} else {
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$this->output( "renaming $row->page_id ($row->page_namespace," .
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"'$row->page_title') to ($ns,'$dest')\n" );
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$this->getPrimaryDB()
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->newUpdateQueryBuilder()
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->update( 'page' )
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->set( [
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'page_namespace' => $ns,
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'page_title' => $dest
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] )
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->where( [ 'page_id' => $row->page_id ] )
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->caller( __METHOD__ )->execute();
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$this->getServiceContainer()->getLinkCache()->clear();
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}
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}
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}
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// @codeCoverageIgnoreStart
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$maintClass = TitleCleanup::class;
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require_once RUN_MAINTENANCE_IF_MAIN;
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// @codeCoverageIgnoreEnd
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