deleteDefaultMessages.php

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<?php
require_once __DIR__ . '/Maintenance.php';
 
use MediaWiki\MediaWikiServices;
 
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 = MediaWikiServices::getInstance();
 
        $this->output( "Checking existence of old default messages..." );
        $dbr = $this->getDB( DB_REPLICA );
 
        $userFactory = $services->getUserFactory();
        $actorQuery = ActorMigration::newMigration()
            ->getWhere( $dbr, 'rev_user', $userFactory->newFromName( 'MediaWiki default' ) );
 
        $res = $dbr->newSelectQueryBuilder()
            ->select( [ 'page_namespace', 'page_title' ] )
            ->tables( [ 'page', 'revision' ] + $actorQuery['tables'] )
            ->where( [
                'page_namespace' => NS_MEDIAWIKI,
                $actorQuery['conds'],
            ] )
            ->joinConds( [ 'revision' => [ 'JOIN', 'page_latest=rev_id' ] ] + $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->getDB( DB_PRIMARY );
 
        $lbFactory = $services->getDBLoadBalancerFactory();
        $wikiPageFactory = $services->getWikiPageFactory();
 
        foreach ( $res as $row ) {
            $lbFactory->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.
            $page->doDeleteArticleReal( 'No longer required', $user );
        }
 
        $this->output( "done!\n", 'msg' );
    }
}
 
$maintClass = DeleteDefaultMessages::class;
require_once RUN_MAINTENANCE_IF_MAIN;