fixLegacyEncoding.php

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<?php
use MediaWiki\Storage\SqlBlobStore;
 
require_once __DIR__ . '/moveToExternal.php';
 
class FixLegacyEncoding extends MoveToExternal {
    public function __construct() {
        parent::__construct();
        $this->addDescription( 'Change encoding of stored content from legacy encoding to UTF-8' );
    }
 
    protected function getConditions( $blockStart, $blockEnd, $dbr ) {
        return [
            "old_id BETWEEN $blockStart AND $blockEnd",
            'old_flags NOT ' . $dbr->buildLike( $dbr->anyString(), 'utf-8', $dbr->anyString() ),
            'old_flags NOT ' . $dbr->buildLike( $dbr->anyString(), 'utf8', $dbr->anyString() ),
        ];
    }
 
    protected function resolveText( $text, $flags ) {
        if ( in_array( 'error', $flags ) ) {
            return [ $text, $flags ];
        }
        $blobStore = $this->getServiceContainer()->getBlobStore();
        if ( in_array( 'external', $flags ) && $blobStore instanceof SqlBlobStore ) {
            $text = $blobStore->expandBlob( $text, $flags );
            // It will be put back in external storage again
            $flags = array_diff( $flags, [ 'external' ] );
        }
        if ( in_array( 'gzip', $flags ) ) {
            $text = gzinflate( $text );
            $flags = array_diff( $flags, [ 'gzip' ] );
        }
        return [ $text, $flags ];
    }
 
}
 
$maintClass = FixLegacyEncoding::class;
require_once RUN_MAINTENANCE_IF_MAIN;