maintenance/removeUnusedAccounts.php

   1 <?php
   2 /**
   3  * Remove unused user accounts from the database
   4  * An unused account is one which has made no edits
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  19  * http://www.gnu.org/copyleft/gpl.html
  20  *
  21  * @file
  22  * @ingroup Maintenance
  23  * @author Rob Church <robchur@gmail.com>
  24  */
  25
  26 require_once __DIR__ . '/Maintenance.php';
  27
  28 /**
  29  * Maintenance script that removes unused user accounts from the database.
  30  *
  31  * @ingroup Maintenance
  32  */
  33 class RemoveUnusedAccounts extends Maintenance {
  34         public function __construct() {
  35                 parent::__construct();
  36                 $this->addOption( 'delete', 'Actually delete the account' );
  37                 $this->addOption( 'ignore-groups', 'List of comma-separated groups to exclude', false, true );
  38                 $this->addOption( 'ignore-touched', 'Skip accounts touched in last N days', false, true );
  39         }
  40
  41         public function execute() {
  42                 $this->output( "Remove unused accounts\n\n" );
  43
  44                 # Do an initial scan for inactive accounts and report the result
  45                 $this->output( "Checking for unused user accounts...\n" );
  46                 $del = [];
  47                 $dbr = $this->getDB( DB_REPLICA );
  48                 $res = $dbr->select( 'user', [ 'user_id', 'user_name', 'user_touched' ], '', __METHOD__ );
  49                 if ( $this->hasOption( 'ignore-groups' ) ) {
  50                         $excludedGroups = explode( ',', $this->getOption( 'ignore-groups' ) );
  51                 } else {
  52                         $excludedGroups = [];
  53                 }
  54                 $touched = $this->getOption( 'ignore-touched', "1" );
  55                 if ( !ctype_digit( $touched ) ) {
  56                         $this->fatalError( "Please put a valid positive integer on the --ignore-touched parameter." );
  57                 }
  58                 $touchedSeconds = 86400 * $touched;
  59                 foreach ( $res as $row ) {
  60                         # Check the account, but ignore it if it's within a $excludedGroups
  61                         # group or if it's touched within the $touchedSeconds seconds.
  62                         $instance = User::newFromId( $row->user_id );
  63                         if ( count( array_intersect( $instance->getEffectiveGroups(), $excludedGroups ) ) == 0
  64                                 && $this->isInactiveAccount( $row->user_id, true )
  65                                 && wfTimestamp( TS_UNIX, $row->user_touched ) < wfTimestamp( TS_UNIX, time() - $touchedSeconds )
  66                         ) {
  67                                 # Inactive; print out the name and flag it
  68                                 $del[] = $row->user_id;
  69                                 $this->output( $row->user_name . "\n" );
  70                         }
  71                 }
  72                 $count = count( $del );
  73                 $this->output( "...found {$count}.\n" );
  74
  75                 # If required, go back and delete each marked account
  76                 if ( $count > 0 && $this->hasOption( 'delete' ) ) {
  77                         $this->output( "\nDeleting unused accounts..." );
  78                         $dbw = $this->getDB( DB_MASTER );
  79                         $dbw->delete( 'user', [ 'user_id' => $del ], __METHOD__ );
  80                         $dbw->delete( 'user_groups', [ 'ug_user' => $del ], __METHOD__ );
  81                         $dbw->delete( 'user_former_groups', [ 'ufg_user' => $del ], __METHOD__ );
  82                         $dbw->delete( 'user_properties', [ 'up_user' => $del ], __METHOD__ );
  83                         $dbw->delete( 'logging', [ 'log_user' => $del ], __METHOD__ );
  84                         $dbw->delete( 'recentchanges', [ 'rc_user' => $del ], __METHOD__ );
  85                         $this->output( "done.\n" );
  86                         # Update the site_stats.ss_users field
  87                         $users = $dbw->selectField( 'user', 'COUNT(*)', [], __METHOD__ );
  88                         $dbw->update(
  89                                 'site_stats',
  90                                 [ 'ss_users' => $users ],
  91                                 [ 'ss_row_id' => 1 ],
  92                                 __METHOD__
  93                         );
  94                 } elseif ( $count > 0 ) {
  95                         $this->output( "\nRun the script again with --delete to remove them from the database.\n" );
  96                 }
  97                 $this->output( "\n" );
  98         }
  99
 100         /**
 101          * Could the specified user account be deemed inactive?
 102          * (No edits, no deleted edits, no log entries, no current/old uploads)
 103          *
 104          * @param int $id User's ID
 105          * @param bool $master Perform checking on the master
 106          * @return bool
 107          */
 108         private function isInactiveAccount( $id, $master = false ) {
 109                 $dbo = $this->getDB( $master ? DB_MASTER : DB_REPLICA );
 110                 $checks = [
 111                         'revision' => 'rev',
 112                         'archive' => 'ar',
 113                         'image' => 'img',
 114                         'oldimage' => 'oi',
 115                         'filearchive' => 'fa'
 116                 ];
 117                 $count = 0;
 118
 119                 $this->beginTransaction( $dbo, __METHOD__ );
 120                 foreach ( $checks as $table => $fprefix ) {
 121                         $conds = [ $fprefix . '_user' => $id ];
 122                         $count += (int)$dbo->selectField( $table, 'COUNT(*)', $conds, __METHOD__ );
 123                 }
 124
 125                 $conds = [ 'log_user' => $id, 'log_type != ' . $dbo->addQuotes( 'newusers' ) ];
 126                 $count += (int)$dbo->selectField( 'logging', 'COUNT(*)', $conds, __METHOD__ );
 127
 128                 $this->commitTransaction( $dbo, __METHOD__ );
 129
 130                 return $count == 0;
 131         }
 132 }
 133
 134 $maintClass = "RemoveUnusedAccounts";
 135 require_once RUN_MAINTENANCE_IF_MAIN;