wikimedia/mediawiki-core

<?php
/**
 * Deletes all pages in the MediaWiki namespace which were last edited by
 * "MediaWiki default".
 *
 * 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
 * @ingroup Maintenance
 */

require_once __DIR__ . '/Maintenance.php';

use MediaWiki\StubObject\StubGlobalUser;
use MediaWiki\Title\Title;
use MediaWiki\User\ActorMigration;
use MediaWiki\User\User;

/**
 * Maintenance script that deletes all pages in the MediaWiki namespace
 * which were last edited by "MediaWiki default".
 *
 * @ingroup Maintenance
 */
class DeleteDefaultMessages extends Maintenance {
    public function __construct() {
        parent::__construct();
        $this->addDescription( 'Deletes all pages in the MediaWiki namespace' .
            ' which were last edited by "MediaWiki default"' );
        $this->addOption( 'dry-run', 'Perform a dry run, delete nothing' );
    }

    public function execute() {
        $services = $this->getServiceContainer();

        $this->output( "Checking existence of old default messages..." );
        $dbr = $this->getReplicaDB();

        $userFactory = $services->getUserFactory();
        $actorQuery = ActorMigration::newMigration()
            ->getWhere( $dbr, 'rev_user', $userFactory->newFromName( 'MediaWiki default' ) );

        $res = $dbr->newSelectQueryBuilder()
            ->select( [ 'page_namespace', 'page_title' ] )
            ->from( 'page' )
            ->join( 'revision', null, 'page_latest=rev_id' )
            ->tables( $actorQuery['tables'] )
            ->where( [
                'page_namespace' => NS_MEDIAWIKI,
                $actorQuery['conds'],
            ] )
            ->joinConds( $actorQuery['joins'] )
            ->caller( __METHOD__ )
            ->fetchResultSet();

        if ( $res->numRows() == 0 ) {
            // No more messages left
            $this->output( "done.\n" );
            return;
        }

        $dryrun = $this->hasOption( 'dry-run' );
        if ( $dryrun ) {
            foreach ( $res as $row ) {
                $title = Title::makeTitle( $row->page_namespace, $row->page_title );
                $this->output( "\n* [[$title]]" );
            }
            $this->output( "\n\nRun again without --dry-run to delete these pages.\n" );
            return;
        }

        // Deletions will be made by $user temporarily added to the bot group
        // in order to hide it in RecentChanges.
        $user = User::newSystemUser( 'MediaWiki default', [ 'steal' => true ] );
        if ( !$user ) {
            $this->fatalError( "Invalid username" );
        }
        $userGroupManager = $services->getUserGroupManager();
        $userGroupManager->addUserToGroup( $user, 'bot' );
        StubGlobalUser::setUser( $user );

        // Handle deletion
        $this->output( "\n...deleting old default messages (this may take a long time!)...", 'msg' );
        $dbw = $this->getPrimaryDB();

        $wikiPageFactory = $services->getWikiPageFactory();
        $delPageFactory = $services->getDeletePageFactory();

        foreach ( $res as $row ) {
            $this->waitForReplication();
            $dbw->ping();
            $title = Title::makeTitle( $row->page_namespace, $row->page_title );
            $page = $wikiPageFactory->newFromTitle( $title );
            // FIXME: Deletion failures should be reported, not silently ignored.
            $delPageFactory->newDeletePage( $page, $user )->deleteUnsafe( 'No longer required' );
        }

        $this->output( "done!\n", 'msg' );
    }
}

$maintClass = DeleteDefaultMessages::class;
require_once RUN_MAINTENANCE_IF_MAIN;