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<?php
/**
 * Makes the required database updates for populating the
 * log_search table retroactively
 *
 * 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
 */
require_once __DIR__ . '/Maintenance.php';
use MediaWiki\MediaWikiServices;
/**
 * Maintenance script that makes the required database updates for populating the
 * log_search table retroactively
 *
 * @ingroup Maintenance
 */
class PopulateLogSearch extends LoggedUpdateMaintenance {
    private static $tableMap = [
        'rev' => 'revision',
        'fa' => 'filearchive',
        'oi' => 'oldimage',
        'ar' => 'archive'
    ];
    public function __construct() {
        parent::__construct();
        $this->addDescription( 'Migrate log params to new table and index for searching' );
        $this->setBatchSize( 100 );
    }
    protected function getUpdateKey() {
        return 'populate log_search';
    }
    protected function updateSkippedMessage() {
        return 'log_search table already populated.';
    }
    protected function doDBUpdates() {
        $batchSize = $this->getBatchSize();
        $db = $this->getDB( DB_MASTER );
        if ( !$db->tableExists( 'log_search', __METHOD__ ) ) {
            $this->error( "log_search does not exist" );
            return false;
        }
        $start = $db->selectField( 'logging', 'MIN(log_id)', '', __FUNCTION__ );
        if ( !$start ) {
            $this->output( "Nothing to do.\n" );
            return true;
        }
        $end = $db->selectField( 'logging', 'MAX(log_id)', '', __FUNCTION__ );
        // This maintenance script is for updating pre-1.16 to 1.16. The target_author_id and
        // target_author_ip relations it adds will later be migrated to target_author_actor by
        // migrateActors.php. If the schema is already 1.34, we should have nothing to do.
        if ( !$db->fieldExists( 'logging', 'log_user', __METHOD__ ) ) {
            $this->output(
                "This does not appear to be an upgrade from MediaWiki pre-1.16 "
                . "(logging.log_user does not exist).\n"
            );
            $this->output( "Nothing to do.\n" );
            return true;
        }
        # Do remaining chunk
        $end += $batchSize - 1;
        $blockStart = $start;
        $blockEnd = $start + $batchSize - 1;
        $lbFactory = MediaWikiServices::getInstance()->getDBLoadBalancerFactory();
        $delTypes = [ 'delete', 'suppress' ]; // revisiondelete types
        while ( $blockEnd <= $end ) {
            $this->output( "...doing log_id from $blockStart to $blockEnd\n" );
            $cond = "log_id BETWEEN " . (int)$blockStart . " AND " . (int)$blockEnd;
            $res = $db->select(
                'logging', [ 'log_id', 'log_type', 'log_action', 'log_params' ], $cond, __FUNCTION__
            );
            foreach ( $res as $row ) {
                // RevisionDelete logs - revisions
                if ( LogEventsList::typeAction( $row, $delTypes, 'revision' ) ) {
                    $params = LogPage::extractParams( $row->log_params );
                    // Param format: <urlparam> <item CSV> [<ofield> <nfield>]
                    if ( count( $params ) < 2 ) {
                        continue; // bad row?
                    }
                    $field = RevisionDeleter::getRelationType( $params[0] );
                    // B/C, the params may start with a title key (<title> <urlparam> <CSV>)
                    if ( $field == null ) {
                        array_shift( $params ); // remove title param
                        $field = RevisionDeleter::getRelationType( $params[0] );
                        if ( $field == null ) {
                            $this->output( "Invalid param type for {$row->log_id}\n" );
                            continue; // skip this row
                        } else {
                            // Clean up the row...
                            $db->update( 'logging',
                                [ 'log_params' => implode( ',', $params ) ],
                                [ 'log_id' => $row->log_id ],
                                __METHOD__
                            );
                        }
                    }
                    $items = explode( ',', $params[1] );
                    $log = new LogPage( $row->log_type );
                    // Add item relations...
                    $log->addRelations( $field, $items, $row->log_id );
                    // Determine what table to query...
                    $prefix = substr( $field, 0, strpos( $field, '_' ) ); // db prefix
                    if ( !isset( self::$tableMap[$prefix] ) ) {
                        continue; // bad row?
                    }
                    $table = self::$tableMap[$prefix];
                    $userField = $prefix . '_user';
                    $userTextField = $prefix . '_user_text';
                    // Add item author relations...
                    $userIds = $userIPs = [];
                    $sres = $db->select( $table,
                        [ $userField, $userTextField ],
                        [ $field => $items ],
                        __METHOD__
                    );
                    foreach ( $sres as $srow ) {
                        if ( $srow->$userField > 0 ) {
                            $userIds[] = intval( $srow->$userField );
                        } elseif ( $srow->$userTextField != '' ) {
                            $userIPs[] = $srow->$userTextField;
                        }
                    }
                    // Add item author relations...
                    $log->addRelations( 'target_author_id', $userIds, $row->log_id );
                    $log->addRelations( 'target_author_ip', $userIPs, $row->log_id );
                } elseif ( LogEventsList::typeAction( $row, $delTypes, 'event' ) ) {
                    // RevisionDelete logs - log events
                    $params = LogPage::extractParams( $row->log_params );
                    // Param format: <item CSV> [<ofield> <nfield>]
                    if ( count( $params ) < 1 ) {
                        continue; // bad row
                    }
                    $items = explode( ',', $params[0] );
                    $log = new LogPage( $row->log_type );
                    // Add item relations...
                    $log->addRelations( 'log_id', $items, $row->log_id );
                    // Add item author relations...
                    $userIds = $userIPs = [];
                    $sres = $db->select( 'logging',
                        [ 'log_user', 'log_user_text' ],
                        [ 'log_id' => $items ],
                        __METHOD__
                    );
                    foreach ( $sres as $srow ) {
                        if ( $srow->log_user > 0 ) {
                            $userIds[] = intval( $srow->log_user );
                        } elseif ( Wikimedia\IPUtils::isIPAddress( $srow->log_user_text ) ) {
                            $userIPs[] = $srow->log_user_text;
                        }
                    }
                    $log->addRelations( 'target_author_id', $userIds, $row->log_id );
                    $log->addRelations( 'target_author_ip', $userIPs, $row->log_id );
                }
            }
            $blockStart += $batchSize;
            $blockEnd += $batchSize;
            $lbFactory->waitForReplication();
        }
        $this->output( "Done populating log_search table.\n" );
        return true;
    }
}
$maintClass = PopulateLogSearch::class;
require_once RUN_MAINTENANCE_IF_MAIN;