includes/specials/SpecialPageLanguage.php

   1 <?php
   2 /**
   3  * Implements Special:PageLanguage
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup SpecialPage
  22  * @author Kunal Grover
  23  * @since 1.24
  24  */
  25
  26 /**
  27  * Special page for changing the content language of a page
  28  *
  29  * @ingroup SpecialPage
  30  */
  31 class SpecialPageLanguage extends FormSpecialPage {
  32         /**
  33          * @var string URL to go to if language change successful
  34          */
  35         private $goToUrl;
  36
  37         public function __construct() {
  38                 parent::__construct( 'PageLanguage', 'pagelang' );
  39         }
  40
  41         public function doesWrites() {
  42                 return true;
  43         }
  44
  45         protected function preText() {
  46                 $this->getOutput()->addModules( 'mediawiki.special.pageLanguage' );
  47         }
  48
  49         protected function getFormFields() {
  50                 // Get default from the subpage of Special page
  51                 $defaultName = $this->par;
  52
  53                 $page = [];
  54                 $page['pagename'] = [
  55                         'type' => 'title',
  56                         'label-message' => 'pagelang-name',
  57                         'default' => $defaultName,
  58                         'autofocus' => $defaultName === null,
  59                         'exists' => true,
  60                 ];
  61
  62                 // Options for whether to use the default language or select language
  63                 $selectoptions = [
  64                         (string)$this->msg( 'pagelang-use-default' )->escaped() => 1,
  65                         (string)$this->msg( 'pagelang-select-lang' )->escaped() => 2,
  66                 ];
  67                 $page['selectoptions'] = [
  68                         'id' => 'mw-pl-options',
  69                         'type' => 'radio',
  70                         'options' => $selectoptions,
  71                         'default' => 1
  72                 ];
  73
  74                 // Building a language selector
  75                 $userLang = $this->getLanguage()->getCode();
  76                 $languages = Language::fetchLanguageNames( $userLang, 'mwfile' );
  77                 ksort( $languages );
  78                 $options = [];
  79                 foreach ( $languages as $code => $name ) {
  80                         $options["$code - $name"] = $code;
  81                 }
  82
  83                 $page['language'] = [
  84                         'id' => 'mw-pl-languageselector',
  85                         'cssclass' => 'mw-languageselector',
  86                         'type' => 'select',
  87                         'options' => $options,
  88                         'label-message' => 'pagelang-language',
  89                         'default' => $this->getConfig()->get( 'LanguageCode' ),
  90                 ];
  91
  92                 // Allow user to enter a comment explaining the change
  93                 $page['reason'] = [
  94                         'type' => 'text',
  95                         'label-message' => 'pagelang-reason'
  96                 ];
  97
  98                 return $page;
  99         }
 100
 101         protected function postText() {
 102                 if ( $this->par ) {
 103                         return $this->showLogFragment( $this->par );
 104                 }
 105                 return '';
 106         }
 107
 108         protected function getDisplayFormat() {
 109                 return 'ooui';
 110         }
 111
 112         public function alterForm( HTMLForm $form ) {
 113                 Hooks::run( 'LanguageSelector', [ $this->getOutput(), 'mw-languageselector' ] );
 114                 $form->setSubmitTextMsg( 'pagelang-submit' );
 115         }
 116
 117         /**
 118          *
 119          * @param array $data
 120          * @return Status
 121          */
 122         public function onSubmit( array $data ) {
 123                 $pageName = $data['pagename'];
 124
 125                 // Check if user wants to use default language
 126                 if ( $data['selectoptions'] == 1 ) {
 127                         $newLanguage = 'default';
 128                 } else {
 129                         $newLanguage = $data['language'];
 130                 }
 131
 132                 try {
 133                         $title = Title::newFromTextThrow( $pageName );
 134                 } catch ( MalformedTitleException $ex ) {
 135                         return Status::newFatal( $ex->getMessageObject() );
 136                 }
 137
 138                 // Check permissions and make sure the user has permission to edit the page
 139                 $errors = $title->getUserPermissionsErrors( 'edit', $this->getUser() );
 140
 141                 if ( $errors ) {
 142                         $out = $this->getOutput();
 143                         $wikitext = $out->formatPermissionsErrorMessage( $errors );
 144                         // Hack to get our wikitext parsed
 145                         return Status::newFatal( new RawMessage( '$1', [ $wikitext ] ) );
 146                 }
 147
 148                 // Url to redirect to after the operation
 149                 $this->goToUrl = $title->getFullURL(
 150                         $title->isRedirect() ? [ 'redirect' => 'no' ] : []
 151                 );
 152
 153                 return self::changePageLanguage(
 154                         $this->getContext(),
 155                         $title,
 156                         $newLanguage,
 157                         $data['reason'] === null ? '' : $data['reason']
 158                 );
 159         }
 160
 161         /**
 162          * @param IContextSource $context
 163          * @param Title $title
 164          * @param string $newLanguage Language code
 165          * @param string $reason Reason for the change
 166          * @param array $tags Change tags to apply to the log entry
 167          * @return Status
 168          */
 169         public static function changePageLanguage( IContextSource $context, Title $title,
 170                 $newLanguage, $reason, array $tags = [] ) {
 171                 // Get the default language for the wiki
 172                 $defLang = $context->getConfig()->get( 'LanguageCode' );
 173
 174                 $pageId = $title->getArticleID();
 175
 176                 // Check if article exists
 177                 if ( !$pageId ) {
 178                         return Status::newFatal(
 179                                 'pagelang-nonexistent-page',
 180                                 wfEscapeWikiText( $title->getPrefixedText() )
 181                         );
 182                 }
 183
 184                 // Load the page language from DB
 185                 $dbw = wfGetDB( DB_MASTER );
 186                 $oldLanguage = $dbw->selectField(
 187                         'page',
 188                         'page_lang',
 189                         [ 'page_id' => $pageId ],
 190                         __METHOD__
 191                 );
 192
 193                 // Check if user wants to use the default language
 194                 if ( $newLanguage === 'default' ) {
 195                         $newLanguage = null;
 196                 }
 197
 198                 // No change in language
 199                 if ( $newLanguage === $oldLanguage ) {
 200                         // Check if old language does not exist
 201                         if ( !$oldLanguage ) {
 202                                 return Status::newFatal( ApiMessage::create(
 203                                         [
 204                                                 'pagelang-unchanged-language-default',
 205                                                 wfEscapeWikiText( $title->getPrefixedText() )
 206                                         ],
 207                                         'pagelang-unchanged-language'
 208                                 ) );
 209                         }
 210                         return Status::newFatal(
 211                                 'pagelang-unchanged-language',
 212                                 wfEscapeWikiText( $title->getPrefixedText() ),
 213                                 $oldLanguage
 214                         );
 215                 }
 216
 217                 // Hardcoded [def] if the language is set to null
 218                 $logOld = $oldLanguage ? $oldLanguage : $defLang . '[def]';
 219                 $logNew = $newLanguage ? $newLanguage : $defLang . '[def]';
 220
 221                 // Writing new page language to database
 222                 $dbw->update(
 223                         'page',
 224                         [ 'page_lang' => $newLanguage ],
 225                         [
 226                                 'page_id' => $pageId,
 227                                 'page_lang' => $oldLanguage
 228                         ],
 229                         __METHOD__
 230                 );
 231
 232                 if ( !$dbw->affectedRows() ) {
 233                         return Status::newFatal( 'pagelang-db-failed' );
 234                 }
 235
 236                 // Logging change of language
 237                 $logParams = [
 238                         '4::oldlanguage' => $logOld,
 239                         '5::newlanguage' => $logNew
 240                 ];
 241                 $entry = new ManualLogEntry( 'pagelang', 'pagelang' );
 242                 $entry->setPerformer( $context->getUser() );
 243                 $entry->setTarget( $title );
 244                 $entry->setParameters( $logParams );
 245                 $entry->setComment( $reason );
 246                 $entry->setTags( $tags );
 247
 248                 $logid = $entry->insert();
 249                 $entry->publish( $logid );
 250
 251                 // Force re-render so that language-based content (parser functions etc.) gets updated
 252                 $title->invalidateCache();
 253
 254                 return Status::newGood( (object)[
 255                         'oldLanguage' => $logOld,
 256                         'newLanguage' => $logNew,
 257                         'logId' => $logid,
 258                 ] );
 259         }
 260
 261         public function onSuccess() {
 262                 // Success causes a redirect
 263                 $this->getOutput()->redirect( $this->goToUrl );
 264         }
 265
 266         function showLogFragment( $title ) {
 267                 $moveLogPage = new LogPage( 'pagelang' );
 268                 $out1 = Xml::element( 'h2', null, $moveLogPage->getName()->text() );
 269                 $out2 = '';
 270                 LogEventsList::showLogExtract( $out2, 'pagelang', $title );
 271                 return $out1 . $out2;
 272         }
 273
 274         /**
 275          * Return an array of subpages beginning with $search that this special page will accept.
 276          *
 277          * @param string $search Prefix to search for
 278          * @param int $limit Maximum number of results to return (usually 10)
 279          * @param int $offset Number of results to skip (usually 0)
 280          * @return string[] Matching subpages
 281          */
 282         public function prefixSearchSubpages( $search, $limit, $offset ) {
 283                 return $this->prefixSearchString( $search, $limit, $offset );
 284         }
 285
 286         protected function getGroupName() {
 287                 return 'pagetools';
 288         }
 289 }