tidyUpBug37714.php

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<?php
require_once __DIR__ . '/Maintenance.php';

class TidyUpBug37714 extends Maintenance {
    public function execute() {
        // Search for all log entries which are about changing the visability of other log entries.
        $result = wfGetDB( DB_SLAVE )->select(
            'logging',
            array( 'log_id', 'log_params' ),
            array(
                'log_type' => array( 'suppress', 'delete' ),
                'log_action' => 'event',
                'log_namespace' => NS_SPECIAL,
                'log_title' => SpecialPage::getTitleFor( 'Log' )->getText()
            ),
            __METHOD__
        );

        foreach ( $result as $row ) {
            $paramLines = explode( "\n", $row->log_params );
            $ids = explode( ',', $paramLines[0] ); // Array dereferencing is PHP >= 5.4 :(
            $result = wfGetDB( DB_SLAVE )->select( // Work out what log entries were changed here.
                'logging',
                'log_type',
                array( 'log_id' => $ids ),
                __METHOD__,
                'DISTINCT'
            );
            if ( $result->numRows() === 1 ) {
                // If there's only one type, the target title can be set to include it.
                $logTitle = SpecialPage::getTitleFor( 'Log', $result->current()->log_type )->getText();
                $this->output( 'Set log_title to "' . $logTitle . '" for log entry ' . $row->log_id . ".\n" );
                wfGetDB( DB_MASTER )->update(
                    'logging',
                    array( 'log_title' => $logTitle ),
                    array( 'log_id' => $row->log_id ),
                    __METHOD__
                );
                wfWaitForSlaves();
            }
        }
    }
}

$maintClass = 'TidyUpBug37714';
require_once RUN_MAINTENANCE_IF_MAIN;