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1<?php
2/**
3 * Check that pages marked as being redirects really are.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
18 * http://www.gnu.org/copyleft/gpl.html
19 *
20 * @file
21 * @ingroup Maintenance
22 */
23
24use MediaWiki\Maintenance\Maintenance;
25use MediaWiki\Revision\SlotRecord;
26use MediaWiki\Title\Title;
27
28// @codeCoverageIgnoreStart
29require_once __DIR__ . '/Maintenance.php';
30// @codeCoverageIgnoreEnd
31
32/**
33 * Maintenance script to check that pages marked as being redirects really are.
34 *
35 * @ingroup Maintenance
36 */
37class CheckBadRedirects extends Maintenance {
38    public function __construct() {
39        parent::__construct();
40        $this->addDescription( 'Check for bad redirects' );
41    }
42
43    public function execute() {
44        $this->output( "Fetching redirects...\n" );
45        $dbr = $this->getReplicaDB();
46        $result = $dbr->newSelectQueryBuilder()
47            ->select( [ 'page_namespace', 'page_title', 'page_latest' ] )
48            ->from( 'page' )
49            ->where( [ 'page_is_redirect' => 1 ] )
50            ->caller( __METHOD__ )
51            ->fetchResultSet();
52
53        $count = $result->numRows();
54        $this->output( "Found $count redirects.\n" .
55            "Checking for bad redirects:\n\n" );
56
57        $revLookup = $this->getServiceContainer()->getRevisionLookup();
58        foreach ( $result as $row ) {
59            $title = Title::makeTitle( $row->page_namespace, $row->page_title );
60            $revRecord = $revLookup->getRevisionById( $row->page_latest );
61            if ( $revRecord ) {
62                $target = $revRecord->getContent( SlotRecord::MAIN )->getRedirectTarget();
63                if ( !$target ) {
64                    $this->output( $title->getPrefixedText() . "\n" );
65                }
66            }
67        }
68        $this->output( "\nDone.\n" );
69    }
70}
71
72// @codeCoverageIgnoreStart
73$maintClass = CheckBadRedirects::class;
74require_once RUN_MAINTENANCE_IF_MAIN;
75// @codeCoverageIgnoreEnd