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<?php
/**
* Look for 'orphan' revisions hooked to pages which don't exist and
* 'childless' pages with no revisions.
* Then, kill the poor widows and orphans.
* Man this is depressing.
*
* Copyright © 2005 Brion Vibber <brion@pobox.com>
* https://www.mediawiki.org/
*
* 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
* @author <brion@pobox.com>
* @ingroup Maintenance
*/
require_once __DIR__ . '/Maintenance.php';
/**
* Maintenance script that looks for 'orphan' revisions hooked to pages which
* don't exist and 'childless' pages with no revisions.
*
* @ingroup Maintenance
*/
class Orphans extends Maintenance {
public function __construct() {
parent::__construct();
$this->addDescription( "Look for 'orphan' revisions hooked to pages which don't exist\n" .
"and 'childless' pages with no revisions\n" .
"Then, kill the poor widows and orphans\n" .
"Man this is depressing"
);
$this->addOption( 'fix', 'Actually fix broken entries' );
}
public function execute() {
$this->checkOrphans( $this->hasOption( 'fix' ) );
$this->checkSeparation( $this->hasOption( 'fix' ) );
# Does not work yet, do not use
# $this->checkWidows( $this->hasOption( 'fix' ) );
}
/**
* Lock the appropriate tables for the script
* @param DatabaseBase $db
* @param string $extraTable The name of any extra tables to lock (eg: text)
*/
private function lockTables( $db, $extraTable = [] ) {
$tbls = [ 'page', 'revision', 'redirect' ];
if ( $extraTable ) {
$tbls = array_merge( $tbls, $extraTable );
}
$db->lockTables( [], $tbls, __METHOD__, false );
}
/**
* Check for orphan revisions
* @param bool $fix Whether to fix broken revisions when found
*/
private function checkOrphans( $fix ) {
$dbw = $this->getDB( DB_MASTER );
$page = $dbw->tableName( 'page' );
$revision = $dbw->tableName( 'revision' );
if ( $fix ) {
$this->lockTables( $dbw );
}
$this->output( "Checking for orphan revision table entries... "
. "(this may take a while on a large wiki)\n" );
$result = $dbw->query( "
SELECT *
FROM $revision LEFT OUTER JOIN $page ON rev_page=page_id
WHERE page_id IS NULL
" );
$orphans = $result->numRows();
if ( $orphans > 0 ) {
global $wgContLang;
$this->output( "$orphans orphan revisions...\n" );
$this->output( sprintf(
"%10s %10s %14s %20s %s\n",
'rev_id', 'rev_page', 'rev_timestamp', 'rev_user_text', 'rev_comment'
) );
foreach ( $result as $row ) {
$comment = ( $row->rev_comment == '' )
? ''
: '(' . $wgContLang->truncate( $row->rev_comment, 40 ) . ')';
$this->output( sprintf( "%10d %10d %14s %20s %s\n",
$row->rev_id,
$row->rev_page,
$row->rev_timestamp,
$wgContLang->truncate( $row->rev_user_text, 17 ),
$comment ) );
if ( $fix ) {
$dbw->delete( 'revision', [ 'rev_id' => $row->rev_id ] );
}
}
if ( !$fix ) {
$this->output( "Run again with --fix to remove these entries automatically.\n" );
}
} else {
$this->output( "No orphans! Yay!\n" );
}
if ( $fix ) {
$dbw->unlockTables( __METHOD__ );
}
}
/**
* @param bool $fix
* @todo DON'T USE THIS YET! It will remove entries which have children,
* but which aren't properly attached (eg if page_latest is bogus
* but valid revisions do exist)
*/
private function checkWidows( $fix ) {
$dbw = $this->getDB( DB_MASTER );
$page = $dbw->tableName( 'page' );
$revision = $dbw->tableName( 'revision' );
if ( $fix ) {
$this->lockTables( $dbw );
}
$this->output( "\nChecking for childless page table entries... "
. "(this may take a while on a large wiki)\n" );
$result = $dbw->query( "
SELECT *
FROM $page LEFT OUTER JOIN $revision ON page_latest=rev_id
WHERE rev_id IS NULL
" );
$widows = $result->numRows();
if ( $widows > 0 ) {
$this->output( "$widows childless pages...\n" );
$this->output( sprintf( "%10s %11s %2s %s\n", 'page_id', 'page_latest', 'ns', 'page_title' ) );
foreach ( $result as $row ) {
printf( "%10d %11d %2d %s\n",
$row->page_id,
$row->page_latest,
$row->page_namespace,
$row->page_title );
if ( $fix ) {
$dbw->delete( 'page', [ 'page_id' => $row->page_id ] );
}
}
if ( !$fix ) {
$this->output( "Run again with --fix to remove these entries automatically.\n" );
}
} else {
$this->output( "No childless pages! Yay!\n" );
}
if ( $fix ) {
$dbw->unlockTables( __METHOD__ );
}
}
/**
* Check for pages where page_latest is wrong
* @param bool $fix Whether to fix broken entries
*/
private function checkSeparation( $fix ) {
$dbw = $this->getDB( DB_MASTER );
$page = $dbw->tableName( 'page' );
$revision = $dbw->tableName( 'revision' );
if ( $fix ) {
$this->lockTables( $dbw, [ 'user', 'text' ] );
}
$this->output( "\nChecking for pages whose page_latest links are incorrect... "
. "(this may take a while on a large wiki)\n" );
$result = $dbw->query( "
SELECT *
FROM $page LEFT OUTER JOIN $revision ON page_latest=rev_id
" );
$found = 0;
foreach ( $result as $row ) {
$result2 = $dbw->query( "
SELECT MAX(rev_timestamp) as max_timestamp
FROM $revision
WHERE rev_page=$row->page_id
" );
$row2 = $dbw->fetchObject( $result2 );
if ( $row2 ) {
if ( $row->rev_timestamp != $row2->max_timestamp ) {
if ( $found == 0 ) {
$this->output( sprintf( "%10s %10s %14s %14s\n",
'page_id', 'rev_id', 'timestamp', 'max timestamp' ) );
}
++$found;
$this->output( sprintf( "%10d %10d %14s %14s\n",
$row->page_id,
$row->page_latest,
$row->rev_timestamp,
$row2->max_timestamp ) );
if ( $fix ) {
# ...
$maxId = $dbw->selectField(
'revision',
'rev_id',
[
'rev_page' => $row->page_id,
'rev_timestamp' => $row2->max_timestamp ] );
$this->output( "... updating to revision $maxId\n" );
$maxRev = Revision::newFromId( $maxId );
$title = Title::makeTitle( $row->page_namespace, $row->page_title );
$article = WikiPage::factory( $title );
$article->updateRevisionOn( $dbw, $maxRev );
}
}
} else {
$this->output( "wtf\n" );
}
}
if ( $found ) {
$this->output( "Found $found pages with incorrect latest revision.\n" );
} else {
$this->output( "No pages with incorrect latest revision. Yay!\n" );
}
if ( !$fix && $found > 0 ) {
$this->output( "Run again with --fix to remove these entries automatically.\n" );
}
if ( $fix ) {
$dbw->unlockTables( __METHOD__ );
}
}
}
$maintClass = "Orphans";
require_once RUN_MAINTENANCE_IF_MAIN;