maintenance/deleteEqualMessages.php

   1 <?php
   2 /**
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2 of the License, or
   6  * (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  16  * http://www.gnu.org/copyleft/gpl.html
  17  *
  18  * @file
  19  * @ingroup Maintenance
  20  */
  21
  22 require_once __DIR__ . '/Maintenance.php';
  23
  24 /**
  25  * Maintenance script that deletes all pages in the MediaWiki namespace
  26  * of which the content is equal to the system default.
  27  *
  28  * @ingroup Maintenance
  29  */
  30 class DeleteEqualMessages extends Maintenance {
  31         public function __construct() {
  32                 parent::__construct();
  33                 $this->mDescription = "Deletes all pages in the MediaWiki namespace that are equal to the default message";
  34                 $this->addOption( 'delete', 'Actually delete the pages (default: dry run)' );
  35                 $this->addOption( 'delete-talk', 'Don\'t leave orphaned talk pages behind during deletion' );
  36                 $this->addOption( 'lang-code', 'Check for subpages of this language code (default: root page against content language). ' .
  37                         'Use value "*" to run for all mwfile language code subpages (including the base pages that override content language).', false, true );
  38         }
  39
  40         /**
  41          * @param string|bool $langCode See --lang-code option.
  42          */
  43         protected function fetchMessageInfo( $langCode, array &$messageInfo ) {
  44                 global $wgContLang;
  45
  46                 if ( $langCode ) {
  47                         $this->output( "\n... fetching message info for language: $langCode" );
  48                         $nonContLang = true;
  49                 } else {
  50                         $this->output( "\n... fetching message info for content language" );
  51                         $langCode = $wgContLang->getCode();
  52                         $nonContLang = false;
  53                 }
  54
  55                 /* Based on SpecialAllmessages::reallyDoQuery #filter=modified */
  56
  57                 $l10nCache = Language::getLocalisationCache();
  58                 $messageNames = $l10nCache->getSubitemList( 'en', 'messages' );
  59                 // Normalise message names for NS_MEDIAWIKI page_title
  60                 $messageNames = array_map( array( $wgContLang, 'ucfirst' ), $messageNames );
  61
  62                 $statuses = AllMessagesTablePager::getCustomisedStatuses( $messageNames, $langCode, $nonContLang );
  63                 // getCustomisedStatuses is stripping the sub page from the page titles, add it back
  64                 $titleSuffix = $nonContLang ? "/$langCode" : '';
  65
  66                 foreach ( $messageNames as $key ) {
  67                         $customised = isset( $statuses['pages'][$key] );
  68                         if ( $customised ) {
  69                                 $actual = wfMessage( $key )->inLanguage( $langCode )->plain();
  70                                 $default = wfMessage( $key )->inLanguage( $langCode )->useDatabase( false )->plain();
  71
  72                                 $messageInfo['relevantPages']++;
  73
  74                                 if (
  75                                         // Exclude messages that are empty by default, such as sitenotice, specialpage
  76                                         // summaries and accesskeys.
  77                                         $default !== '' && $default !== '-' &&
  78                                                 $actual === $default
  79                                 ) {
  80                                         $hasTalk = isset( $statuses['talks'][$key] );
  81                                         $messageInfo['results'][] = array(
  82                                                 'title' => $key . $titleSuffix,
  83                                                 'hasTalk' => $hasTalk,
  84                                         );
  85                                         $messageInfo['equalPages']++;
  86                                         if ( $hasTalk ) {
  87                                                 $messageInfo['equalPagesTalks']++;
  88                                         }
  89                                 }
  90                         }
  91                 }
  92         }
  93
  94         public function execute() {
  95                 $doDelete = $this->hasOption( 'delete' );
  96                 $doDeleteTalk = $this->hasOption( 'delete-talk' );
  97                 $langCode = $this->getOption( 'lang-code' );
  98
  99                 $messageInfo = array(
 100                         'relevantPages' => 0,
 101                         'equalPages' => 0,
 102                         'equalPagesTalks' => 0,
 103                         'results' => array(),
 104                 );
 105
 106                 $this->output( 'Checking for pages with default message...' );
 107
 108                 // Load message information
 109                 if ( $langCode ) {
 110                         $langCodes = Language::fetchLanguageNames( null, 'mwfile' );
 111                         if ( $langCode === '*' ) {
 112                                 // All valid lang-code subpages in NS_MEDIAWIKI that
 113                                 // override the messsages in that language
 114                                 foreach ( $langCodes as $key => $value ) {
 115                                         $this->fetchMessageInfo( $key, $messageInfo );
 116                                 }
 117                                 // Lastly, the base pages in NS_MEDIAWIKI that override
 118                                 // messages in content language
 119                                 $this->fetchMessageInfo( false, $messageInfo );
 120                         } else {
 121                                 if ( !isset( $langCodes[$langCode] ) ) {
 122                                         $this->error( 'Invalid language code: ' . $langCode, 1 );
 123                                 }
 124                                 $this->fetchMessageInfo( $langCode, $messageInfo );
 125                         }
 126                 } else {
 127                         $this->fetchMessageInfo( false, $messageInfo );
 128                 }
 129
 130                 if ( $messageInfo['equalPages'] === 0 ) {
 131                         // No more equal messages left
 132                         $this->output( "\ndone.\n" );
 133
 134                         return;
 135                 }
 136
 137                 $this->output( "\n{$messageInfo['relevantPages']} pages in the MediaWiki namespace override messages." );
 138                 $this->output( "\n{$messageInfo['equalPages']} pages are equal to the default message (+ {$messageInfo['equalPagesTalks']} talk pages).\n" );
 139
 140                 if ( !$doDelete ) {
 141                         $list = '';
 142                         foreach ( $messageInfo['results'] as $result ) {
 143                                 $title = Title::makeTitle( NS_MEDIAWIKI, $result['title'] );
 144                                 $list .= "* [[$title]]\n";
 145                                 if ( $result['hasTalk'] ) {
 146                                         $title = Title::makeTitle( NS_MEDIAWIKI_TALK, $result['title'] );
 147                                         $list .= "* [[$title]]\n";
 148                                 }
 149                         }
 150                         $this->output( "\nList:\n$list\nRun the script again with --delete to delete these pages" );
 151                         if ( $messageInfo['equalPagesTalks'] !== 0 ) {
 152                                 $this->output( " (include --delete-talk to also delete the talk pages)" );
 153                         }
 154                         $this->output( "\n" );
 155
 156                         return;
 157                 }
 158
 159                 $user = User::newFromName( 'MediaWiki default' );
 160                 if ( !$user ) {
 161                         $this->error( "Invalid username", true );
 162                 }
 163                 global $wgUser;
 164                 $wgUser = $user;
 165
 166                 // Hide deletions from RecentChanges
 167                 $user->addGroup( 'bot' );
 168
 169                 // Handle deletion
 170                 $this->output( "\n...deleting equal messages (this may take a long time!)..." );
 171                 $dbw = wfGetDB( DB_MASTER );
 172                 foreach ( $messageInfo['results'] as $result ) {
 173                         wfWaitForSlaves();
 174                         $dbw->ping();
 175                         $title = Title::makeTitle( NS_MEDIAWIKI, $result['title'] );
 176                         $this->output( "\n* [[$title]]" );
 177                         $page = WikiPage::factory( $title );
 178                         $error = ''; // Passed by ref
 179                         $page->doDeleteArticle( 'No longer required', false, 0, false, $error, $user );
 180                         if ( $result['hasTalk'] && $doDeleteTalk ) {
 181                                 $title = Title::makeTitle( NS_MEDIAWIKI_TALK, $result['title'] );
 182                                 $this->output( "\n* [[$title]]" );
 183                                 $page = WikiPage::factory( $title );
 184                                 $error = ''; // Passed by ref
 185                                 $page->doDeleteArticle( 'Orphaned talk page of no longer required message', false, 0, false, $error, $user );
 186                         }
 187                 }
 188                 $this->output( "\n\ndone!\n" );
 189         }
 190 }
 191
 192 $maintClass = "DeleteEqualMessages";
 193 require_once RUN_MAINTENANCE_IF_MAIN;