144 lines
4.6 KiB
PHP
144 lines
4.6 KiB
PHP
<?php
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/**
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* Backend functions for suppressing and unsuppressing all references to a given user.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* http://www.gnu.org/copyleft/gpl.html
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*
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* @file
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* @ingroup RevisionDelete
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*/
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use Wikimedia\Rdbms\IDatabase;
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/**
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* Backend functions for suppressing and unsuppressing all references to a given user,
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* used when blocking with HideUser enabled. This was spun out of SpecialBlockip.php
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* in 1.18; at some point it needs to be rewritten to either use RevisionDelete abstraction,
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* or at least schema abstraction.
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*
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* @ingroup RevisionDelete
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*/
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class RevisionDeleteUser {
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/**
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* Update *_deleted bitfields in various tables to hide or unhide usernames
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* @param string $name Username
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* @param int $userId User id
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* @param string $op Operator '|' or '&'
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* @param null|IDatabase $dbw If you happen to have one lying around
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* @return bool
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*/
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private static function setUsernameBitfields( $name, $userId, $op, $dbw ) {
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if ( !$userId || ( $op !== '|' && $op !== '&' ) ) {
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return false; // sanity check
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}
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if ( !$dbw instanceof IDatabase ) {
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$dbw = wfGetDB( DB_MASTER );
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}
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# To suppress, we OR the current bitfields with Revision::DELETED_USER
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# to put a 1 in the username *_deleted bit. To unsuppress we AND the
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# current bitfields with the inverse of Revision::DELETED_USER. The
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# username bit is made to 0 (x & 0 = 0), while others are unchanged (x & 1 = x).
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# The same goes for the sysop-restricted *_deleted bit.
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$delUser = Revision::DELETED_USER | Revision::DELETED_RESTRICTED;
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$delAction = LogPage::DELETED_ACTION | Revision::DELETED_RESTRICTED;
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if ( $op == '&' ) {
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$delUser = $dbw->bitNot( $delUser );
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$delAction = $dbw->bitNot( $delAction );
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}
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# Normalize user name
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$userTitle = Title::makeTitleSafe( NS_USER, $name );
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$userDbKey = $userTitle->getDBkey();
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# Hide name from live edits
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$dbw->update(
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'revision',
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[ self::buildSetBitDeletedField( 'rev_deleted', $op, $delUser, $dbw ) ],
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[ 'rev_user' => $userId ],
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__METHOD__ );
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# Hide name from deleted edits
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$dbw->update(
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'archive',
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[ self::buildSetBitDeletedField( 'ar_deleted', $op, $delUser, $dbw ) ],
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[ 'ar_user_text' => $name ],
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__METHOD__
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);
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# Hide name from logs
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$dbw->update(
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'logging',
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[ self::buildSetBitDeletedField( 'log_deleted', $op, $delUser, $dbw ) ],
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[ 'log_user' => $userId, 'log_type != ' . $dbw->addQuotes( 'suppress' ) ],
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__METHOD__
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);
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$dbw->update(
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'logging',
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[ self::buildSetBitDeletedField( 'log_deleted', $op, $delAction, $dbw ) ],
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[ 'log_namespace' => NS_USER, 'log_title' => $userDbKey,
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'log_type != ' . $dbw->addQuotes( 'suppress' ) ],
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__METHOD__
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);
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# Hide name from RC
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$dbw->update(
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'recentchanges',
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[ self::buildSetBitDeletedField( 'rc_deleted', $op, $delUser, $dbw ) ],
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[ 'rc_user_text' => $name ],
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__METHOD__
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);
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$dbw->update(
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'recentchanges',
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[ self::buildSetBitDeletedField( 'rc_deleted', $op, $delAction, $dbw ) ],
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[ 'rc_namespace' => NS_USER, 'rc_title' => $userDbKey, 'rc_logid > 0' ],
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__METHOD__
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);
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# Hide name from live images
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$dbw->update(
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'oldimage',
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[ self::buildSetBitDeletedField( 'oi_deleted', $op, $delUser, $dbw ) ],
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[ 'oi_user_text' => $name ],
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__METHOD__
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);
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# Hide name from deleted images
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$dbw->update(
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'filearchive',
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[ self::buildSetBitDeletedField( 'fa_deleted', $op, $delUser, $dbw ) ],
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[ 'fa_user_text' => $name ],
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__METHOD__
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);
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# Done!
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return true;
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}
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private static function buildSetBitDeletedField( $field, $op, $value, $dbw ) {
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return $field . ' = ' . ( $op === '&'
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? $dbw->bitAnd( $field, $value )
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: $dbw->bitOr( $field, $value ) );
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}
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public static function suppressUserName( $name, $userId, $dbw = null ) {
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return self::setUsernameBitfields( $name, $userId, '|', $dbw );
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}
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public static function unsuppressUserName( $name, $userId, $dbw = null ) {
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return self::setUsernameBitfields( $name, $userId, '&', $dbw );
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}
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}
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