cleanupCaps.php

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<?php
use MediaWiki\MediaWikiServices;

require_once __DIR__ . '/cleanupTable.inc';

class CleanupCaps extends TableCleanup {

    private $user;
    private $namespace;

    public function __construct() {
        parent::__construct();
        $this->addDescription( 'Script to cleanup capitalization' );
        $this->addOption( 'namespace', 'Namespace number to run caps cleanup on', false, true );
    }

    public function execute() {
        $this->user = User::newSystemUser( 'Conversion script', [ 'steal' => true ] );

        $this->namespace = intval( $this->getOption( 'namespace', 0 ) );

        if (
            MediaWikiServices::getInstance()->getNamespaceInfo()->
                isCapitalized( $this->namespace )
        ) {
            $this->output( "Will be moving pages to first letter capitalized titles" );
            $callback = 'processRowToUppercase';
        } else {
            $this->output( "Will be moving pages to first letter lowercase titles" );
            $callback = 'processRowToLowercase';
        }

        $this->dryrun = $this->hasOption( 'dry-run' );

        $this->runTable( [
            'table' => 'page',
            'conds' => [ 'page_namespace' => $this->namespace ],
            'index' => 'page_id',
            'callback' => $callback ] );
    }

    protected function processRowToUppercase( $row ) {
        $current = Title::makeTitle( $row->page_namespace, $row->page_title );
        $display = $current->getPrefixedText();
        $lower = $row->page_title;
        $upper = MediaWikiServices::getInstance()->getContentLanguage()->ucfirst( $row->page_title );
        if ( $upper == $lower ) {
            $this->output( "\"$display\" already uppercase.\n" );

            return $this->progress( 0 );
        }

        $target = Title::makeTitle( $row->page_namespace, $upper );
        if ( $target->exists() ) {
            // Prefix "CapsCleanup" to bypass the conflict
            $target = Title::newFromText( 'CapsCleanup/' . $display );
        }
        $ok = $this->movePage(
            $current,
            $target,
            'Converting page title to first-letter uppercase',
            false
        );
        if ( $ok ) {
            $this->progress( 1 );
            if ( $row->page_namespace == $this->namespace ) {
                $talk = $target->getTalkPage();
                $row->page_namespace = $talk->getNamespace();
                if ( $talk->exists() ) {
                    return $this->processRowToUppercase( $row );
                }
            }
        }

        return $this->progress( 0 );
    }

    protected function processRowToLowercase( $row ) {
        $current = Title::makeTitle( $row->page_namespace, $row->page_title );
        $display = $current->getPrefixedText();
        $upper = $row->page_title;
        $lower = MediaWikiServices::getInstance()->getContentLanguage()->lcfirst( $row->page_title );
        if ( $upper == $lower ) {
            $this->output( "\"$display\" already lowercase.\n" );

            return $this->progress( 0 );
        }

        $target = Title::makeTitle( $row->page_namespace, $lower );
        if ( $target->exists() ) {
            $targetDisplay = $target->getPrefixedText();
            $this->output( "\"$display\" skipped; \"$targetDisplay\" already exists\n" );

            return $this->progress( 0 );
        }

        $ok = $this->movePage( $current, $target, 'Converting page titles to lowercase', true );
        if ( $ok === true ) {
            $this->progress( 1 );
            if ( $row->page_namespace == $this->namespace ) {
                $talk = $target->getTalkPage();
                $row->page_namespace = $talk->getNamespace();
                if ( $talk->exists() ) {
                    return $this->processRowToLowercase( $row );
                }
            }
        }

        return $this->progress( 0 );
    }

    private function movePage( Title $current, Title $target, $reason, $createRedirect ) {
        $display = $current->getPrefixedText();
        $targetDisplay = $target->getPrefixedText();

        if ( $this->dryrun ) {
            $this->output( "\"$display\" -> \"$targetDisplay\": DRY RUN, NOT MOVED\n" );
            $ok = 'OK';
        } else {
            $mp = MediaWikiServices::getInstance()->getMovePageFactory()
                ->newMovePage( $current, $target );
            $status = $mp->move( $this->user, $reason, $createRedirect );
            $ok = $status->isOK() ? 'OK' : $status->getMessage( false, false, 'en' )->text();
            $this->output( "\"$display\" -> \"$targetDisplay\": $ok\n" );
        }

        return $ok === 'OK';
    }
}

$maintClass = CleanupCaps::class;
require_once RUN_MAINTENANCE_IF_MAIN;