deleteAutoPatrolLogs.php

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<?php
require_once __DIR__ . '/Maintenance.php';
 
class DeleteAutoPatrolLogs extends Maintenance {
 
    public function __construct() {
        parent::__construct();
        $this->addDescription( 'Remove autopatrol logs in the logging table' );
        $this->addOption( 'dry-run', 'Print debug info instead of actually deleting' );
        $this->addOption(
            'check-old',
            'Check old patrol logs (for deleting old format autopatrols).' .
                'Note that this will not delete rows older than 2011 (MediaWiki 1.18).'
        );
        $this->addOption(
            'before',
            'Timestamp to delete only before that time, all MediaWiki timestamp formats are accepted',
            false,
            true
        );
        $this->addOption(
            'from-id',
            'First row (log id) to start updating from',
            false,
            true
        );
        $this->addOption(
            'sleep',
            'Sleep time (in seconds) between every batch',
            false,
            true
        );
        $this->setBatchSize( 1000 );
    }
 
    public function execute() {
        $this->setBatchSize( $this->getOption( 'batch-size', $this->getBatchSize() ) );
 
        $sleep = (int)$this->getOption( 'sleep', 10 );
        $fromId = $this->getOption( 'from-id', null );
        $this->countDown( 5 );
        while ( true ) {
            if ( $this->hasOption( 'check-old' ) ) {
                $rowsData = $this->getRowsOld( $fromId );
                // We reached end of the table
                if ( !$rowsData ) {
                    break;
                }
                $rows = $rowsData['rows'];
                $fromId = $rowsData['lastId'];
 
                // There is nothing to delete in this batch
                if ( !$rows ) {
                    continue;
                }
            } else {
                $rows = $this->getRows( $fromId );
                if ( !$rows ) {
                    break;
                }
                $fromId = end( $rows );
            }
 
            if ( $this->hasOption( 'dry-run' ) ) {
                $this->output( 'These rows will get deleted: ' . implode( ', ', $rows ) . "\n" );
            } else {
                $this->deleteRows( $rows );
                $this->output( 'Processed up to row id ' . end( $rows ) . "\n" );
            }
 
            if ( $sleep > 0 ) {
                sleep( $sleep );
            }
        }
    }
 
    private function getRows( $fromId ) {
        $dbr = MediaWiki\MediaWikiServices::getInstance()->getDBLoadBalancer()->getConnection(
            DB_REPLICA
        );
        $before = $this->getOption( 'before', false );
 
        $conds = [
            'log_type' => 'patrol',
            'log_action' => 'autopatrol',
        ];
 
        if ( $fromId ) {
            $conds[] = 'log_id > ' . $dbr->addQuotes( $fromId );
        }
 
        if ( $before ) {
            $conds[] = 'log_timestamp < ' . $dbr->addQuotes( $dbr->timestamp( $before ) );
        }
 
        return $dbr->selectFieldValues(
            'logging',
            'log_id',
            $conds,
            __METHOD__,
            [ 'LIMIT' => $this->getBatchSize() ]
        );
    }
 
    private function getRowsOld( $fromId ) {
        $dbr = MediaWiki\MediaWikiServices::getInstance()->getDBLoadBalancer()->getConnection(
            DB_REPLICA
        );
        $batchSize = $this->getBatchSize();
        $before = $this->getOption( 'before', false );
 
        $conds = [
            'log_type' => 'patrol',
            'log_action' => 'patrol',
        ];
 
        if ( $fromId ) {
            $conds[] = 'log_id > ' . $dbr->addQuotes( $fromId );
        }
 
        if ( $before ) {
            $conds[] = 'log_timestamp < ' . $dbr->addQuotes( $dbr->timestamp( $before ) );
        }
 
        $result = $dbr->select(
            'logging',
            [ 'log_id', 'log_params' ],
            $conds,
            __METHOD__,
            [ 'LIMIT' => $batchSize ]
        );
 
        $last = null;
        $autopatrols = [];
        foreach ( $result as $row ) {
            $last = $row->log_id;
            Wikimedia\suppressWarnings();
            $params = unserialize( $row->log_params );
            Wikimedia\restoreWarnings();
 
            // Skipping really old rows, before 2011
            if ( !is_array( $params ) || !array_key_exists( '6::auto', $params ) ) {
                continue;
            }
 
            $auto = $params['6::auto'];
            if ( $auto ) {
                $autopatrols[] = $row->log_id;
            }
        }
 
        if ( $last === null ) {
            return null;
        }
 
        return [ 'rows' => $autopatrols, 'lastId' => $last ];
    }
 
    private function deleteRows( array $rows ) {
        $dbw = MediaWiki\MediaWikiServices::getInstance()->getDBLoadBalancer()->getConnection(
            DB_MASTER
        );
 
        $dbw->delete(
            'logging',
            [ 'log_id' => $rows ],
            __METHOD__
        );
 
        MediaWiki\MediaWikiServices::getInstance()->getDBLoadBalancerFactory()->waitForReplication();
    }
 
}
 
$maintClass = DeleteAutoPatrolLogs::class;
require_once RUN_MAINTENANCE_IF_MAIN;