MediaWiki  master
RevisionDeleteUser.php
Go to the documentation of this file.
1 <?php
26 
36 
46  private static function setUsernameBitfields( $name, $userId, $op, IDatabase $dbw = null ) {
47  if ( !$userId || ( $op !== '|' && $op !== '&' ) ) {
48  return false; // sanity check
49  }
50  if ( !$dbw instanceof IDatabase ) {
51  $dbw = wfGetDB( DB_MASTER );
52  }
53 
54  # To suppress, we OR the current bitfields with RevisionRecord::DELETED_USER
55  # to put a 1 in the username *_deleted bit. To unsuppress we AND the
56  # current bitfields with the inverse of RevisionRecord::DELETED_USER. The
57  # username bit is made to 0 (x & 0 = 0), while others are unchanged (x & 1 = x).
58  # The same goes for the sysop-restricted *_deleted bit.
59  $delUser = RevisionRecord::DELETED_USER | RevisionRecord::DELETED_RESTRICTED;
60  $delAction = LogPage::DELETED_ACTION | RevisionRecord::DELETED_RESTRICTED;
61  if ( $op === '&' ) {
62  $delUser = $dbw->bitNot( $delUser );
63  $delAction = $dbw->bitNot( $delAction );
64  }
65 
66  # Normalize user name
67  $userTitle = Title::makeTitleSafe( NS_USER, $name );
68  $userDbKey = $userTitle->getDBkey();
69 
70  $actorId = $dbw->selectField( 'actor', 'actor_id', [ 'actor_name' => $name ], __METHOD__ );
71  if ( $actorId ) {
72  # Hide name from live edits
73  $ids = $dbw->selectFieldValues(
74  'revision_actor_temp', 'revactor_rev', [ 'revactor_actor' => $actorId ], __METHOD__
75  );
76  if ( $ids ) {
77  $dbw->update(
78  'revision',
79  [ self::buildSetBitDeletedField( 'rev_deleted', $op, $delUser, $dbw ) ],
80  [ 'rev_id' => $ids ],
81  __METHOD__
82  );
83  }
84 
85  # Hide name from deleted edits
86  $dbw->update(
87  'archive',
88  [ self::buildSetBitDeletedField( 'ar_deleted', $op, $delUser, $dbw ) ],
89  [ 'ar_actor' => $actorId ],
90  __METHOD__
91  );
92 
93  # Hide name from logs
94  $dbw->update(
95  'logging',
96  [ self::buildSetBitDeletedField( 'log_deleted', $op, $delUser, $dbw ) ],
97  [ 'log_actor' => $actorId, 'log_type != ' . $dbw->addQuotes( 'suppress' ) ],
98  __METHOD__
99  );
100 
101  # Hide name from RC
102  $dbw->update(
103  'recentchanges',
104  [ self::buildSetBitDeletedField( 'rc_deleted', $op, $delUser, $dbw ) ],
105  [ 'rc_actor' => $actorId ],
106  __METHOD__
107  );
108 
109  # Hide name from live images
110  $dbw->update(
111  'oldimage',
112  [ self::buildSetBitDeletedField( 'oi_deleted', $op, $delUser, $dbw ) ],
113  [ 'oi_actor' => $actorId ],
114  __METHOD__
115  );
116 
117  # Hide name from deleted images
118  $dbw->update(
119  'filearchive',
120  [ self::buildSetBitDeletedField( 'fa_deleted', $op, $delUser, $dbw ) ],
121  [ 'fa_actor' => $actorId ],
122  __METHOD__
123  );
124  }
125 
126  # Hide log entries pointing to the user page
127  $dbw->update(
128  'logging',
129  [ self::buildSetBitDeletedField( 'log_deleted', $op, $delAction, $dbw ) ],
130  [ 'log_namespace' => NS_USER, 'log_title' => $userDbKey,
131  'log_type != ' . $dbw->addQuotes( 'suppress' ) ],
132  __METHOD__
133  );
134 
135  # Hide RC entries pointing to the user page
136  $dbw->update(
137  'recentchanges',
138  [ self::buildSetBitDeletedField( 'rc_deleted', $op, $delAction, $dbw ) ],
139  [ 'rc_namespace' => NS_USER, 'rc_title' => $userDbKey, 'rc_logid > 0' ],
140  __METHOD__
141  );
142 
143  return true;
144  }
145 
146  private static function buildSetBitDeletedField( $field, $op, $value, IDatabase $dbw ) {
147  return $field . ' = ' . ( $op === '&'
148  ? $dbw->bitAnd( $field, $value )
149  : $dbw->bitOr( $field, $value ) );
150  }
151 
158  public static function suppressUserName( $name, $userId, IDatabase $dbw = null ) {
159  return self::setUsernameBitfields( $name, $userId, '|', $dbw );
160  }
161 
168  public static function unsuppressUserName( $name, $userId, IDatabase $dbw = null ) {
169  return self::setUsernameBitfields( $name, $userId, '&', $dbw );
170  }
171 }
wfGetDB( $db, $groups=[], $wiki=false)
Get a Database object.
static buildSetBitDeletedField( $field, $op, $value, IDatabase $dbw)
const DB_MASTER
Definition: defines.php:26
bitAnd( $fieldLeft, $fieldRight)
Backend functions for suppressing and unsuppressing all references to a given user, used when blocking with HideUser enabled.
bitOr( $fieldLeft, $fieldRight)
static unsuppressUserName( $name, $userId, IDatabase $dbw=null)
static setUsernameBitfields( $name, $userId, $op, IDatabase $dbw=null)
Update *_deleted bitfields in various tables to hide or unhide usernames.
static makeTitleSafe( $ns, $title, $fragment='', $interwiki='')
Create a new Title from a namespace index and a DB key.
Definition: Title.php:610
Basic database interface for live and lazy-loaded relation database handles.
Definition: IDatabase.php:38
static suppressUserName( $name, $userId, IDatabase $dbw=null)
const DELETED_ACTION
Definition: LogPage.php:34