migrateExternallinks.php

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<?php
 
use MediaWiki\ExternalLinks\LinkFilter;
 
require_once __DIR__ . '/Maintenance.php';
 
class MigrateExternallinks extends LoggedUpdateMaintenance {
    public function __construct() {
        parent::__construct();
        $this->addDescription(
            'Migrate externallinks data'
        );
        $this->addOption(
            'sleep',
            'Sleep time (in seconds) between every batch. Default: 0',
            false,
            true
        );
        $this->setBatchSize( 1000 );
    }
 
    protected function getUpdateKey() {
        return __CLASS__;
    }
 
    protected function doDBUpdates() {
        $dbw = $this->getDB( DB_PRIMARY );
        $table = 'externallinks';
        if ( !$dbw->fieldExists( $table, 'el_to', __METHOD__ ) ) {
            $this->output( "Old fields don't exist. There is no need to run this script\n" );
            return true;
        }
        if ( !$dbw->fieldExists( $table, 'el_to_path', __METHOD__ ) ) {
            $this->output( "Run update.php to create the el_to_path column.\n" );
            return false;
        }
 
        $this->output( "Populating el_to_domain_index and el_to_path columns\n" );
        $updated = 0;
 
        $highestId = $dbw->newSelectQueryBuilder()
            ->select( 'el_id' )
            ->from( $table )
            ->limit( 1 )
            ->caller( __METHOD__ )
            ->orderBy( 'el_id', 'DESC' )
            ->fetchResultSet()->fetchRow();
        if ( !$highestId ) {
            $this->output( "Page table is empty.\n" );
            return true;
        }
        $highestId = $highestId[0];
        $id = 0;
        while ( $id <= $highestId ) {
            $updated += $this->handleBatch( $id );
            $id += $this->getBatchSize();
        }
 
        $this->output( "Completed normalization of $table, $updated rows updated.\n" );
 
        return true;
    }
 
    private function handleBatch( $lowId ) {
        $batchSize = $this->getBatchSize();
        // BETWEEN is inclusive, let's subtract one.
        $highId = $lowId + $batchSize - 1;
        $dbw = $this->getDB( DB_PRIMARY );
        $updated = 0;
        $res = $dbw->newSelectQueryBuilder()
            ->select( [ 'el_id', 'el_to' ] )
            ->from( 'externallinks' )
            ->where( [
                'el_to_domain_index' => '',
                "el_id BETWEEN $lowId AND $highId"
            ] )
            ->limit( $batchSize )
            ->caller( __METHOD__ )
            ->fetchResultSet();
        if ( !$res->numRows() ) {
            return $updated;
        }
        foreach ( $res as $row ) {
            $url = $row->el_to;
            $paths = LinkFilter::makeIndexes( $url );
            if ( !$paths ) {
                continue;
            }
            // just take the first one, we are not sending proto-relative to LinkFilter
            $update = [
                'el_to_domain_index' => substr( $paths[0][0], 0, 255 ),
                'el_to_path' => $paths[0][1]
            ];
            $dbw->update( 'externallinks', $update, [ 'el_id' => $row->el_id ], __METHOD__ );
            $updated += $dbw->affectedRows();
        }
        $this->output( "Updated $updated rows\n" );
        // Sleep between batches for replication to catch up
        $this->waitForReplication();
        $sleep = (int)$this->getOption( 'sleep', 0 );
        if ( $sleep > 0 ) {
            sleep( $sleep );
        }
        return $updated;
    }
 
}
 
$maintClass = MigrateExternallinks::class;
require_once RUN_MAINTENANCE_IF_MAIN;