maintenance/storage/fixLegacyEncoding.php
<?php
/**
* 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 ExternalStorage
*/
use MediaWiki\Storage\SqlBlobStore;
use Wikimedia\Rdbms\IExpression;
use Wikimedia\Rdbms\LikeValue;
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 [
$dbr->expr( 'old_id', '>=', $blockStart ),
$dbr->expr( 'old_id', '<=', $blockEnd ),
$dbr->expr( 'old_flags', IExpression::NOT_LIKE,
new LikeValue( $dbr->anyString(), 'utf-8', $dbr->anyString() ) ),
$dbr->expr( 'old_flags', IExpression::NOT_LIKE,
new LikeValue( $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 ) {
$newText = $blobStore->expandBlob( $text, $flags );
if ( $newText === false ) {
return [ false, $flags ];
}
$text = $newText;
// It will be put back in external storage again
$flags = array_diff( $flags, [ 'external' ] );
}
if ( in_array( 'gzip', $flags ) ) {
$newText = gzinflate( $text );
if ( $newText === false ) {
return [ false, $flags ];
}
$text = $newText;
$flags = array_diff( $flags, [ 'gzip' ] );
}
return [ $text, $flags ];
}
}
$maintClass = FixLegacyEncoding::class;
require_once RUN_MAINTENANCE_IF_MAIN;