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
  43                 $this->output( "Remove unused accounts\n\n" );
  44
  45                 # Do an initial scan for inactive accounts and report the result
  46                 $this->output( "Checking for unused user accounts...\n" );
  47                 $del = array();
  48                 $dbr = wfGetDB( DB_SLAVE );
  49                 $res = $dbr->select( 'user', array( 'user_id', 'user_name', 'user_touched' ), '', __METHOD__ );
  50                 if ( $this->hasOption( 'ignore-groups' ) ) {
  51                         $excludedGroups = explode( ',', $this->getOption( 'ignore-groups' ) );
  52                 } else {
  53                         $excludedGroups = array();
  54                 }
  55                 $touched = $this->getOption( 'ignore-touched', "1" );
  56                 if ( !ctype_digit( $touched ) ) {
  57                         $this->error( "Please put a valid positive integer on the --ignore-touched parameter.", true );
  58                 }
  59                 $touchedSeconds = 86400 * $touched;
  60                 foreach ( $res as $row ) {
  61                         # Check the account, but ignore it if it's within a $excludedGroups 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 inactive accounts..." );
  78                         $dbw = wfGetDB( DB_MASTER );
  79                         $dbw->delete( 'user', array( 'user_id' => $del ), __METHOD__ );
  80                         $dbw->delete( 'logging', array( 'log_user' => $del ), __METHOD__ );
  81                         $dbw->delete( 'recentchanges', array( 'rc_user' => $del ), __METHOD__ );
  82                         $this->output( "done.\n" );
  83                         # Update the site_stats.ss_users field
  84                         $users = $dbw->selectField( 'user', 'COUNT(*)', array(), __METHOD__ );
  85                         $dbw->update( 'site_stats', array( 'ss_users' => $users ), array( 'ss_row_id' => 1 ), __METHOD__ );
  86                 } elseif ( $count > 0 ) {
  87                         $this->output( "\nRun the script again with --delete to remove them from the database.\n" );
  88                 }
  89                 $this->output( "\n" );
  90         }
  91
  92         /**
  93          * Could the specified user account be deemed inactive?
  94          * (No edits, no deleted edits, no log entries, no current/old uploads)
  95          *
  96          * @param $id User's ID
  97          * @param $master bool Perform checking on the master
  98          * @return bool
  99          */
 100         private function isInactiveAccount( $id, $master = false ) {
 101                 $dbo = wfGetDB( $master ? DB_MASTER : DB_SLAVE );
 102                 $checks = array(
 103                         'revision' => 'rev',
 104                         'archive' => 'ar',
 105                         'image' => 'img',
 106                         'oldimage' => 'oi',
 107                         'filearchive' => 'fa'
 108                 );
 109                 $count = 0;
 110
 111                 $dbo->begin( __METHOD__ );
 112                 foreach ( $checks as $table => $fprefix ) {
 113                         $conds = array( $fprefix . '_user' => $id );
 114                         $count += (int)$dbo->selectField( $table, 'COUNT(*)', $conds, __METHOD__ );
 115                 }
 116
 117                 $conds = array( 'log_user' => $id, 'log_type != ' . $dbo->addQuotes( 'newusers' ) );
 118                 $count += (int)$dbo->selectField( 'logging', 'COUNT(*)', $conds, __METHOD__ );
 119
 120                 $dbo->commit( __METHOD__ );
 121
 122                 return $count == 0;
 123         }
 124 }
 125
 126 $maintClass = "RemoveUnusedAccounts";
 127 require_once RUN_MAINTENANCE_IF_MAIN;