1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
<?php
/**
* Backend functions for suppressing and unsuppressing all references to a given user.
*
* 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 RevisionDelete
*/
use MediaWiki\MediaWikiServices;
use MediaWiki\Revision\RevisionRecord;
use MediaWiki\Title\Title;
use Wikimedia\Rdbms\IDatabase;
use Wikimedia\Rdbms\RawSQLValue;
/**
* Backend functions for suppressing and unsuppressing all references to a given user,
* used when blocking with HideUser enabled. This was spun out of SpecialBlockip.php
* in 1.18; at some point it needs to be rewritten to either use RevisionDelete abstraction,
* or at least schema abstraction.
*
* @ingroup RevisionDelete
*/
class RevisionDeleteUser {
/**
* Update *_deleted bitfields in various tables to hide or unhide usernames
*
* @param string $name Username
* @param int $userId
* @param string $op Operator '|' or '&'
* @param null|IDatabase $dbw If you happen to have one lying around
* @return bool True on success, false on failure (e.g. invalid user ID)
*/
private static function setUsernameBitfields( $name, $userId, $op, ?IDatabase $dbw = null ) {
if ( !$userId || ( $op !== '|' && $op !== '&' ) ) {
return false;
}
if ( !$dbw instanceof IDatabase ) {
$dbw = MediaWikiServices::getInstance()->getConnectionProvider()->getPrimaryDatabase();
}
# To suppress, we OR the current bitfields with RevisionRecord::DELETED_USER
# to put a 1 in the username *_deleted bit. To unsuppress we AND the
# current bitfields with the inverse of RevisionRecord::DELETED_USER. The
# username bit is made to 0 (x & 0 = 0), while others are unchanged (x & 1 = x).
# The same goes for the sysop-restricted *_deleted bit.
$delUser = RevisionRecord::DELETED_USER | RevisionRecord::DELETED_RESTRICTED;
$delAction = LogPage::DELETED_ACTION | RevisionRecord::DELETED_RESTRICTED;
if ( $op === '&' ) {
$delUser = $dbw->bitNot( $delUser );
$delAction = $dbw->bitNot( $delAction );
}
# Normalize user name
$userTitle = Title::makeTitleSafe( NS_USER, $name );
$userDbKey = $userTitle->getDBkey();
$actorId = $dbw->newSelectQueryBuilder()
->select( 'actor_id' )
->from( 'actor' )
->where( [ 'actor_name' => $name ] )
->caller( __METHOD__ )->fetchField();
if ( $actorId ) {
# Hide name from live edits
$dbw->newUpdateQueryBuilder()
->update( 'revision' )
->set( self::buildSetBitDeletedField( 'rev_deleted', $op, $delUser, $dbw ) )
->where( [ 'rev_actor' => $actorId ] )
->caller( __METHOD__ )->execute();
# Hide name from deleted edits
$dbw->newUpdateQueryBuilder()
->update( 'archive' )
->set( self::buildSetBitDeletedField( 'ar_deleted', $op, $delUser, $dbw ) )
->where( [ 'ar_actor' => $actorId ] )
->caller( __METHOD__ )->execute();
# Hide name from logs
$dbw->newUpdateQueryBuilder()
->update( 'logging' )
->set( self::buildSetBitDeletedField( 'log_deleted', $op, $delUser, $dbw ) )
->where( [ 'log_actor' => $actorId, $dbw->expr( 'log_type', '!=', 'suppress' ) ] )
->caller( __METHOD__ )->execute();
# Hide name from RC
$dbw->newUpdateQueryBuilder()
->update( 'recentchanges' )
->set( self::buildSetBitDeletedField( 'rc_deleted', $op, $delUser, $dbw ) )
->where( [ 'rc_actor' => $actorId ] )
->caller( __METHOD__ )->execute();
# Hide name from live images
$dbw->newUpdateQueryBuilder()
->update( 'oldimage' )
->set( self::buildSetBitDeletedField( 'oi_deleted', $op, $delUser, $dbw ) )
->where( [ 'oi_actor' => $actorId ] )
->caller( __METHOD__ )->execute();
# Hide name from deleted images
$dbw->newUpdateQueryBuilder()
->update( 'filearchive' )
->set( self::buildSetBitDeletedField( 'fa_deleted', $op, $delUser, $dbw ) )
->where( [ 'fa_actor' => $actorId ] )
->caller( __METHOD__ )->execute();
}
# Hide log entries pointing to the user page
$dbw->newUpdateQueryBuilder()
->update( 'logging' )
->set( self::buildSetBitDeletedField( 'log_deleted', $op, $delAction, $dbw ) )
->where( [
'log_namespace' => NS_USER,
'log_title' => $userDbKey,
$dbw->expr( 'log_type', '!=', 'suppress' )
] )
->caller( __METHOD__ )->execute();
# Hide RC entries pointing to the user page
$dbw->newUpdateQueryBuilder()
->update( 'recentchanges' )
->set( self::buildSetBitDeletedField( 'rc_deleted', $op, $delAction, $dbw ) )
->where( [ 'rc_namespace' => NS_USER, 'rc_title' => $userDbKey, $dbw->expr( 'rc_logid', '>', 0 ) ] )
->caller( __METHOD__ )->execute();
return true;
}
private static function buildSetBitDeletedField( $field, $op, $value, IDatabase $dbw ) {
return [ $field => new RawSQLValue( $op === '&'
? $dbw->bitAnd( $field, $value )
: $dbw->bitOr( $field, $value )
) ];
}
/**
* @param string $name User name
* @param int $userId Both user name and ID must be provided
* @param IDatabase|null $dbw If you happen to have one lying around
* @return bool True on success, false on failure (e.g. invalid user ID)
*/
public static function suppressUserName( $name, $userId, ?IDatabase $dbw = null ) {
return self::setUsernameBitfields( $name, $userId, '|', $dbw );
}
/**
* @param string $name User name
* @param int $userId Both user name and ID must be provided
* @param IDatabase|null $dbw If you happen to have one lying around
* @return bool True on success, false on failure (e.g. invalid user ID)
*/
public static function unsuppressUserName( $name, $userId, ?IDatabase $dbw = null ) {
return self::setUsernameBitfields( $name, $userId, '&', $dbw );
}
}
|
