maintenance/nukeNS.php

   1 <?php
   2 /**
   3  * Remove pages with only 1 revision from the MediaWiki namespace, without
   4  * flooding recent changes, delete logs, etc.
   5  * Irreversible (can't use standard undelete) and does not update link tables
   6  *
   7  * This is mainly useful to run before maintenance/update.php when upgrading
   8  * to 1.9, to prevent flooding recent changes/deletion logs.  It's intended
   9  * to be conservative, so it's possible that a few entries will be left for
  10  * deletion by the upgrade script.  It's also possible that it hasn't been
  11  * tested thouroughly enough, and will delete something it shouldn't; so
  12  * back up your DB if there's anything in the MediaWiki that is important to
  13  * you.
  14  *
  15  * This program is free software; you can redistribute it and/or modify
  16  * it under the terms of the GNU General Public License as published by
  17  * the Free Software Foundation; either version 2 of the License, or
  18  * (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License along
  26  * with this program; if not, write to the Free Software Foundation, Inc.,
  27  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  28  * http://www.gnu.org/copyleft/gpl.html
  29  *
  30  * @file
  31  * @ingroup Maintenance
  32  * @author Steve Sanbeg
  33  * based on nukePage by Rob Church
  34  */
  35
  36 require_once( __DIR__ . '/Maintenance.php' );
  37
  38 /**
  39  * Maintenance script that removes pages with only one revision from the
  40  * MediaWiki namespace.
  41  *
  42  * @ingroup Maintenance
  43  */
  44 class NukeNS extends Maintenance {
  45         public function __construct() {
  46                 parent::__construct();
  47                 $this->mDescription = "Remove pages with only 1 revision from any namespace";
  48                 $this->addOption( 'delete', "Actually delete the page" );
  49                 $this->addOption( 'ns', 'Namespace to delete from, default NS_MEDIAWIKI', false, true );
  50                 $this->addOption( 'all', 'Delete everything regardless of revision count' );
  51         }
  52
  53         public function execute() {
  54                 $ns = $this->getOption( 'ns', NS_MEDIAWIKI );
  55                 $delete = $this->getOption( 'delete', false );
  56                 $all = $this->getOption( 'all', false );
  57                 $dbw = wfGetDB( DB_MASTER );
  58                 $dbw->begin( __METHOD__ );
  59
  60                 $tbl_pag = $dbw->tableName( 'page' );
  61                 $tbl_rev = $dbw->tableName( 'revision' );
  62                 $res = $dbw->query( "SELECT page_title FROM $tbl_pag WHERE page_namespace = $ns" );
  63
  64                 $n_deleted = 0;
  65
  66                 foreach ( $res as $row ) {
  67                         // echo "$ns_name:".$row->page_title, "\n";
  68                         $title = Title::makeTitle( $ns, $row->page_title );
  69                         $id = $title->getArticleID();
  70
  71                         // Get corresponding revisions
  72                         $res2 = $dbw->query( "SELECT rev_id FROM $tbl_rev WHERE rev_page = $id" );
  73                         $revs = array();
  74
  75                         foreach ( $res2 as $row2 ) {
  76                                 $revs[] = $row2->rev_id;
  77                         }
  78                         $count = count( $revs );
  79
  80                         // skip anything that looks modified (i.e. multiple revs)
  81                         if ( $all || $count == 1 ) {
  82                                 # echo $title->getPrefixedText(), "\t", $count, "\n";
  83                                 $this->output( "delete: " . $title->getPrefixedText() . "\n" );
  84
  85                                 // as much as I hate to cut & paste this, it's a little different, and
  86                                 // I already have the id & revs
  87                                 if ( $delete ) {
  88                                         $dbw->query( "DELETE FROM $tbl_pag WHERE page_id = $id" );
  89                                         $dbw->commit( __METHOD__ );
  90                                         // Delete revisions as appropriate
  91                                         $child = $this->runChild( 'NukePage', 'nukePage.php' );
  92                                         $child->deleteRevisions( $revs );
  93                                         $this->purgeRedundantText( true );
  94                                         $n_deleted ++;
  95                                 }
  96                         } else {
  97                                 $this->output( "skip: " . $title->getPrefixedText() . "\n" );
  98                         }
  99                 }
 100                 $dbw->commit( __METHOD__ );
 101
 102                 if ( $n_deleted > 0 ) {
 103                         # update statistics - better to decrement existing count, or just count
 104                         # the page table?
 105                         $pages = $dbw->selectField( 'site_stats', 'ss_total_pages' );
 106                         $pages -= $n_deleted;
 107                         $dbw->update(
 108                                 'site_stats',
 109                                 array( 'ss_total_pages' => $pages ),
 110                                 array( 'ss_row_id' => 1 ),
 111                                 __METHOD__
 112                         );
 113                 }
 114
 115                 if ( !$delete ) {
 116                         $this->output( "To update the database, run the script with the --delete option.\n" );
 117                 }
 118         }
 119 }
 120
 121 $maintClass = "NukeNS";
 122 require_once( RUN_MAINTENANCE_IF_MAIN );