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<?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
*/
use MediaWiki\Maintenance\LoggedUpdateMaintenance;
// @codeCoverageIgnoreStart
require_once __DIR__ . '/Maintenance.php';
// @codeCoverageIgnoreEnd
/**
* Fix redirect pages with missing or incomplete row in the redirect table.
*
* @ingroup Maintenance
* @since 1.41
*/
class FixInconsistentRedirects extends LoggedUpdateMaintenance {
public function __construct() {
parent::__construct();
$this->addDescription( 'Fix redirect pages with missing or incomplete row in the redirect table' );
$this->setBatchSize( 100 );
}
protected function getUpdateKey() {
return __CLASS__;
}
protected function doDBUpdates() {
$dbr = $this->getReplicaDB();
$builder = $dbr->newSelectQueryBuilder()
->caller( __METHOD__ )
->from( 'page' )
->where( [ 'page_is_redirect' => 1 ] );
$this->output( "Fixing inconsistent redirects ...\n" );
$estimateCount = $builder->estimateRowCount();
$this->output( "Estimated redirect page count: $estimateCount\n" );
$builder
->limit( $this->getBatchSize() )
->leftJoin( 'redirect', null, 'page_id=rd_from' )
->select( [ 'rd_from', 'rd_interwiki', 'rd_fragment' ] );
// Using the page_redirect_namespace_len index to skip non-redirects
$index = [ 'page_is_redirect', 'page_namespace', 'page_len', 'page_id' ];
$builder->select( $index )->orderBy( $index );
$prevRow = [];
$total = 0;
$updated = 0;
do {
$res = ( clone $builder )
->where( $prevRow ? [ $dbr->buildComparison( '>', $prevRow ) ] : [] )
->caller( __METHOD__ )->fetchResultSet();
foreach ( $res as $row ) {
// Only attempt write queries if the row or rd_interwiki/rd_fragment fields are missing
// (we don't include this condition in the query to avoid slow queries and bad estimates)
if ( $row->rd_from === null || $row->rd_interwiki === null || $row->rd_fragment === null ) {
RefreshLinks::fixRedirect( $this, $row->page_id );
$updated++;
}
}
if ( isset( $row ) ) {
// Update the conditions to select the next batch
foreach ( $index as $field ) {
$prevRow[ $field ] = $row->$field;
}
}
$this->waitForReplication();
$total += $res->numRows();
$this->output( "$updated/$total\n" );
} while ( $res->numRows() == $this->getBatchSize() );
$this->output( "Done, updated $updated of $total rows.\n" );
return true;
}
}
// @codeCoverageIgnoreStart
$maintClass = FixInconsistentRedirects::class;
require_once RUN_MAINTENANCE_IF_MAIN;
// @codeCoverageIgnoreEnd
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