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