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Diffstat (limited to 'www/wiki/includes/revisiondelete/RevisionDeleteUser.php')
| -rw-r--r-- | www/wiki/includes/revisiondelete/RevisionDeleteUser.php | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/www/wiki/includes/revisiondelete/RevisionDeleteUser.php b/www/wiki/includes/revisiondelete/RevisionDeleteUser.php new file mode 100644 index 00000000..6291e8d9 --- /dev/null +++ b/www/wiki/includes/revisiondelete/RevisionDeleteUser.php @@ -0,0 +1,208 @@ +<?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 Wikimedia\Rdbms\IDatabase; + +/** + * 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 User id + * @param string $op Operator '|' or '&' + * @param null|IDatabase $dbw If you happen to have one lying around + * @return bool + */ + private static function setUsernameBitfields( $name, $userId, $op, $dbw ) { + global $wgActorTableSchemaMigrationStage; + + if ( !$userId || ( $op !== '|' && $op !== '&' ) ) { + return false; // sanity check + } + if ( !$dbw instanceof IDatabase ) { + $dbw = wfGetDB( DB_MASTER ); + } + + # To suppress, we OR the current bitfields with Revision::DELETED_USER + # to put a 1 in the username *_deleted bit. To unsuppress we AND the + # current bitfields with the inverse of Revision::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 = Revision::DELETED_USER | Revision::DELETED_RESTRICTED; + $delAction = LogPage::DELETED_ACTION | Revision::DELETED_RESTRICTED; + if ( $op == '&' ) { + $delUser = $dbw->bitNot( $delUser ); + $delAction = $dbw->bitNot( $delAction ); + } + + # Normalize user name + $userTitle = Title::makeTitleSafe( NS_USER, $name ); + $userDbKey = $userTitle->getDBkey(); + + if ( $wgActorTableSchemaMigrationStage < MIGRATION_NEW ) { + # Hide name from live edits + $dbw->update( + 'revision', + [ self::buildSetBitDeletedField( 'rev_deleted', $op, $delUser, $dbw ) ], + [ 'rev_user' => $userId ], + __METHOD__ ); + + # Hide name from deleted edits + $dbw->update( + 'archive', + [ self::buildSetBitDeletedField( 'ar_deleted', $op, $delUser, $dbw ) ], + [ 'ar_user_text' => $name ], + __METHOD__ + ); + + # Hide name from logs + $dbw->update( + 'logging', + [ self::buildSetBitDeletedField( 'log_deleted', $op, $delUser, $dbw ) ], + [ 'log_user' => $userId, 'log_type != ' . $dbw->addQuotes( 'suppress' ) ], + __METHOD__ + ); + + # Hide name from RC + $dbw->update( + 'recentchanges', + [ self::buildSetBitDeletedField( 'rc_deleted', $op, $delUser, $dbw ) ], + [ 'rc_user_text' => $name ], + __METHOD__ + ); + + # Hide name from live images + $dbw->update( + 'oldimage', + [ self::buildSetBitDeletedField( 'oi_deleted', $op, $delUser, $dbw ) ], + [ 'oi_user_text' => $name ], + __METHOD__ + ); + + # Hide name from deleted images + $dbw->update( + 'filearchive', + [ self::buildSetBitDeletedField( 'fa_deleted', $op, $delUser, $dbw ) ], + [ 'fa_user_text' => $name ], + __METHOD__ + ); + } + + if ( $wgActorTableSchemaMigrationStage > MIGRATION_OLD ) { + $actorId = $dbw->selectField( 'actor', 'actor_id', [ 'actor_name' => $name ], __METHOD__ ); + if ( $actorId ) { + # Hide name from live edits + $subquery = $dbw->selectSQLText( + 'revision_actor_temp', 'revactor_rev', [ 'revactor_actor' => $actorId ], __METHOD__ + ); + $dbw->update( + 'revision', + [ self::buildSetBitDeletedField( 'rev_deleted', $op, $delUser, $dbw ) ], + [ "rev_id IN ($subquery)" ], + __METHOD__ ); + + # Hide name from deleted edits + $dbw->update( + 'archive', + [ self::buildSetBitDeletedField( 'ar_deleted', $op, $delUser, $dbw ) ], + [ 'ar_actor' => $actorId ], + __METHOD__ + ); + + # Hide name from logs + $dbw->update( + 'logging', + [ self::buildSetBitDeletedField( 'log_deleted', $op, $delUser, $dbw ) ], + [ 'log_actor' => $actorId, 'log_type != ' . $dbw->addQuotes( 'suppress' ) ], + __METHOD__ + ); + + # Hide name from RC + $dbw->update( + 'recentchanges', + [ self::buildSetBitDeletedField( 'rc_deleted', $op, $delUser, $dbw ) ], + [ 'rc_actor' => $actorId ], + __METHOD__ + ); + + # Hide name from live images + $dbw->update( + 'oldimage', + [ self::buildSetBitDeletedField( 'oi_deleted', $op, $delUser, $dbw ) ], + [ 'oi_actor' => $actorId ], + __METHOD__ + ); + + # Hide name from deleted images + $dbw->update( + 'filearchive', + [ self::buildSetBitDeletedField( 'fa_deleted', $op, $delUser, $dbw ) ], + [ 'fa_actor' => $actorId ], + __METHOD__ + ); + } + } + + # Hide log entries pointing to the user page + $dbw->update( + 'logging', + [ self::buildSetBitDeletedField( 'log_deleted', $op, $delAction, $dbw ) ], + [ 'log_namespace' => NS_USER, 'log_title' => $userDbKey, + 'log_type != ' . $dbw->addQuotes( 'suppress' ) ], + __METHOD__ + ); + + # Hide RC entries pointing to the user page + $dbw->update( + 'recentchanges', + [ self::buildSetBitDeletedField( 'rc_deleted', $op, $delAction, $dbw ) ], + [ 'rc_namespace' => NS_USER, 'rc_title' => $userDbKey, 'rc_logid > 0' ], + __METHOD__ + ); + + # Done! + return true; + } + + private static function buildSetBitDeletedField( $field, $op, $value, $dbw ) { + return $field . ' = ' . ( $op === '&' + ? $dbw->bitAnd( $field, $value ) + : $dbw->bitOr( $field, $value ) ); + } + + public static function suppressUserName( $name, $userId, $dbw = null ) { + return self::setUsernameBitfields( $name, $userId, '|', $dbw ); + } + + public static function unsuppressUserName( $name, $userId, $dbw = null ) { + return self::setUsernameBitfields( $name, $userId, '&', $dbw ); + } +} |