RevisionDeleteUser.php

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<?php
class RevisionDeleteUser {

        private static function setUsernameBitfields( $name, $userId, $op, $dbw ) {
                if ( !$userId || ( $op !== '|' && $op !== '&' ) ) {
                        return false; // sanity check
                }
                if ( !$dbw instanceof DatabaseBase ) {
                        $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 == '&' ) {
                        $delUser = "~{$delUser}";
                        $delAction = "~{$delAction}";
                }

                # Normalize user name
                $userTitle = Title::makeTitleSafe( NS_USER, $name );
                $userDbKey = $userTitle->getDBkey();

                # Hide name from live edits
                $dbw->update(
                        'revision',
                        array( "rev_deleted = rev_deleted $op $delUser" ),
                        array( 'rev_user' => $userId ),
                        __METHOD__ );

                # Hide name from deleted edits
                $dbw->update(
                        'archive',
                        array( "ar_deleted = ar_deleted $op $delUser" ),
                        array( 'ar_user_text' => $name ),
                        __METHOD__
                );

                # Hide name from logs
                $dbw->update(
                        'logging',
                        array( "log_deleted = log_deleted $op $delUser" ),
                        array( 'log_user' => $userId, "log_type != 'suppress'" ),
                        __METHOD__
                );
                $dbw->update(
                        'logging',
                        array( "log_deleted = log_deleted $op $delAction" ),
                        array( 'log_namespace' => NS_USER, 'log_title' => $userDbKey,
                                "log_type != 'suppress'" ),
                        __METHOD__
                );

                # Hide name from RC
                $dbw->update(
                        'recentchanges',
                        array( "rc_deleted = rc_deleted $op $delUser" ),
                        array( 'rc_user_text' => $name ),
                        __METHOD__
                );
                $dbw->update(
                        'recentchanges',
                        array( "rc_deleted = rc_deleted $op $delAction" ),
                        array( 'rc_namespace' => NS_USER, 'rc_title' => $userDbKey, 'rc_logid > 0' ),
                        __METHOD__
                );

                # Hide name from live images
                $dbw->update(
                        'oldimage',
                        array( "oi_deleted = oi_deleted $op $delUser" ),
                        array( 'oi_user_text' => $name ),
                        __METHOD__
                );

                # Hide name from deleted images
                $dbw->update(
                        'filearchive',
                        array( "fa_deleted = fa_deleted $op $delUser" ),
                        array( 'fa_user_text' => $name ),
                        __METHOD__
                );
                # Done!
                return true;
        }

        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 );
        }
}