MediaWiki REL1_37
fixTimestamps.php
Go to the documentation of this file.
1<?php
28require_once __DIR__ . '/Maintenance.php';
29
37 public function __construct() {
38 parent::__construct();
39 $this->addDescription( '' );
40 $this->addArg( 'offset', '' );
41 $this->addArg( 'start', 'Starting timestamp' );
42 $this->addArg( 'end', 'Ending timestamp' );
43 }
44
45 public function execute() {
46 $offset = $this->getArg( 0 ) * 3600;
47 $start = $this->getArg( 1 );
48 $end = $this->getArg( 2 );
49 // maximum normal clock offset
50 $grace = 60;
51
52 # Find bounding revision IDs
53 $dbw = $this->getDB( DB_PRIMARY );
54 $revisionTable = $dbw->tableName( 'revision' );
55 $res = $dbw->query( "SELECT MIN(rev_id) as minrev, MAX(rev_id) as maxrev FROM $revisionTable " .
56 "WHERE rev_timestamp BETWEEN '{$start}' AND '{$end}'", __METHOD__ );
57 $row = $dbw->fetchObject( $res );
58
59 if ( $row->minrev === null ) {
60 $this->fatalError( "No revisions in search period." );
61 }
62
63 $minRev = $row->minrev;
64 $maxRev = $row->maxrev;
65
66 # Select all timestamps and IDs
67 $sql = "SELECT rev_id, rev_timestamp FROM $revisionTable " .
68 "WHERE rev_id BETWEEN $minRev AND $maxRev";
69 if ( $offset > 0 ) {
70 $sql .= " ORDER BY rev_id DESC";
71 $expectedSign = -1;
72 } else {
73 $expectedSign = 1;
74 }
75
76 $res = $dbw->query( $sql, __METHOD__ );
77
78 $lastNormal = 0;
79 $badRevs = [];
80 $numGoodRevs = 0;
81
82 foreach ( $res as $row ) {
83 $timestamp = wfTimestamp( TS_UNIX, $row->rev_timestamp );
84 $delta = $timestamp - $lastNormal;
85 $sign = $delta == 0 ? 0 : $delta / abs( $delta );
86 if ( $sign == 0 || $sign == $expectedSign ) {
87 // Monotonic change
88 $lastNormal = $timestamp;
89 ++$numGoodRevs;
90 } elseif ( abs( $delta ) <= $grace ) {
91 // Non-monotonic change within grace interval
92 ++$numGoodRevs;
93 } else {
94 // Non-monotonic change larger than grace interval
95 $badRevs[] = $row->rev_id;
96 }
97 }
98
99 $numBadRevs = count( $badRevs );
100 if ( $numBadRevs > $numGoodRevs ) {
101 $this->fatalError(
102 "The majority of revisions in the search interval are marked as bad.
103
104 Are you sure the offset ($offset) has the right sign? Positive means the clock
105 was incorrectly set forward, negative means the clock was incorrectly set back.
106
107 If the offset is right, then increase the search interval until there are enough
108 good revisions to provide a majority reference." );
109 } elseif ( $numBadRevs == 0 ) {
110 $this->output( "No bad revisions found.\n" );
111 return;
112 }
113
114 $this->output( sprintf( "Fixing %d revisions (%.2f%% of revisions in search interval)\n",
115 $numBadRevs, $numBadRevs / ( $numGoodRevs + $numBadRevs ) * 100 ) );
116
117 $fixup = -$offset;
118 $sql = "UPDATE $revisionTable " .
119 "SET rev_timestamp="
120 . "DATE_FORMAT(DATE_ADD(rev_timestamp, INTERVAL $fixup SECOND), '%Y%m%d%H%i%s') " .
121 "WHERE rev_id IN (" . $dbw->makeList( $badRevs ) . ')';
122 $dbw->query( $sql, __METHOD__ );
123 $this->output( "Done\n" );
124 }
125}
126
127$maintClass = FixTimestamps::class;
128require_once RUN_MAINTENANCE_IF_MAIN;
getDB()
wfTimestamp( $outputtype=TS_UNIX, $ts=0)
Get a timestamp string in one of various formats.
Maintenance script that fixes timestamp corruption caused by one or more webservers temporarily being...
execute()
Do the actual work.
__construct()
Default constructor.
Abstract maintenance class for quickly writing and churning out maintenance scripts with minimal effo...
addArg( $arg, $description, $required=true)
Add some args that are needed.
output( $out, $channel=null)
Throw some output to the user.
getArg( $argId=0, $default=null)
Get an argument.
addDescription( $text)
Set the description text.
fatalError( $msg, $exitCode=1)
Output a message and terminate the current script.
$maintClass
const DB_PRIMARY
Definition defines.php:27