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                 $title = $defaultName ? Title::newFromText( $defaultName ) : null;
  53                 if ( $title ) {
  54                         $defaultPageLanguage =
  55                                 ContentHandler::getForTitle( $title )->getPageLanguage( $title );
  56                         $hasCustomLanguageSet = !$defaultPageLanguage->equals( $title->getPageLanguage() );
  57                 } else {
  58                         $hasCustomLanguageSet = false;
  59                 }
  60
  61                 $page = [];
  62                 $page['pagename'] = [
  63                         'type' => 'title',
  64                         'label-message' => 'pagelang-name',
  65                         'default' => $title ? $title->getPrefixedText() : $defaultName,
  66                         'autofocus' => $defaultName === null,
  67                         'exists' => true,
  68                 ];
  69
  70                 // Options for whether to use the default language or select language
  71                 $selectoptions = [
  72                         (string)$this->msg( 'pagelang-use-default' )->escaped() => 1,
  73                         (string)$this->msg( 'pagelang-select-lang' )->escaped() => 2,
  74                 ];
  75                 $page['selectoptions'] = [
  76                         'id' => 'mw-pl-options',
  77                         'type' => 'radio',
  78                         'options' => $selectoptions,
  79                         'default' => $hasCustomLanguageSet ? 2 : 1
  80                 ];
  81
  82                 // Building a language selector
  83                 $userLang = $this->getLanguage()->getCode();
  84                 $languages = Language::fetchLanguageNames( $userLang, 'mwfile' );
  85                 $options = [];
  86                 foreach ( $languages as $code => $name ) {
  87                         $options["$code - $name"] = $code;
  88                 }
  89
  90                 $page['language'] = [
  91                         'id' => 'mw-pl-languageselector',
  92                         'cssclass' => 'mw-languageselector',
  93                         'type' => 'select',
  94                         'options' => $options,
  95                         'label-message' => 'pagelang-language',
  96                         'default' => $title ?
  97                                 $title->getPageLanguage()->getCode() :
  98                                 $this->getConfig()->get( 'LanguageCode' ),
  99                 ];
 100
 101                 // Allow user to enter a comment explaining the change
 102                 $page['reason'] = [
 103                         'type' => 'text',
 104                         'label-message' => 'pagelang-reason'
 105                 ];
 106
 107                 return $page;
 108         }
 109
 110         protected function postText() {
 111                 if ( $this->par ) {
 112                         return $this->showLogFragment( $this->par );
 113                 }
 114                 return '';
 115         }
 116
 117         protected function getDisplayFormat() {
 118                 return 'ooui';
 119         }
 120
 121         public function alterForm( HTMLForm $form ) {
 122                 Hooks::run( 'LanguageSelector', [ $this->getOutput(), 'mw-languageselector' ] );
 123                 $form->setSubmitTextMsg( 'pagelang-submit' );
 124         }
 125
 126         /**
 127          *
 128          * @param array $data
 129          * @return Status
 130          */
 131         public function onSubmit( array $data ) {
 132                 $pageName = $data['pagename'];
 133
 134                 // Check if user wants to use default language
 135                 if ( $data['selectoptions'] == 1 ) {
 136                         $newLanguage = 'default';
 137                 } else {
 138                         $newLanguage = $data['language'];
 139                 }
 140
 141                 try {
 142                         $title = Title::newFromTextThrow( $pageName );
 143                 } catch ( MalformedTitleException $ex ) {
 144                         return Status::newFatal( $ex->getMessageObject() );
 145                 }
 146
 147                 // Check permissions and make sure the user has permission to edit the page
 148                 $errors = $title->getUserPermissionsErrors( 'edit', $this->getUser() );
 149
 150                 if ( $errors ) {
 151                         $out = $this->getOutput();
 152                         $wikitext = $out->formatPermissionsErrorMessage( $errors );
 153                         // Hack to get our wikitext parsed
 154                         return Status::newFatal( new RawMessage( '$1', [ $wikitext ] ) );
 155                 }
 156
 157                 // Url to redirect to after the operation
 158                 $this->goToUrl = $title->getFullUrlForRedirect(
 159                         $title->isRedirect() ? [ 'redirect' => 'no' ] : []
 160                 );
 161
 162                 return self::changePageLanguage(
 163                         $this->getContext(),
 164                         $title,
 165                         $newLanguage,
 166                         $data['reason'] === null ? '' : $data['reason']
 167                 );
 168         }
 169
 170         /**
 171          * @param IContextSource $context
 172          * @param Title $title
 173          * @param string $newLanguage Language code
 174          * @param string $reason Reason for the change
 175          * @param array $tags Change tags to apply to the log entry
 176          * @return Status
 177          */
 178         public static function changePageLanguage( IContextSource $context, Title $title,
 179                 $newLanguage, $reason, array $tags = [] ) {
 180                 // Get the default language for the wiki
 181                 $defLang = $context->getConfig()->get( 'LanguageCode' );
 182
 183                 $pageId = $title->getArticleID();
 184
 185                 // Check if article exists
 186                 if ( !$pageId ) {
 187                         return Status::newFatal(
 188                                 'pagelang-nonexistent-page',
 189                                 wfEscapeWikiText( $title->getPrefixedText() )
 190                         );
 191                 }
 192
 193                 // Load the page language from DB
 194                 $dbw = wfGetDB( DB_MASTER );
 195                 $oldLanguage = $dbw->selectField(
 196                         'page',
 197                         'page_lang',
 198                         [ 'page_id' => $pageId ],
 199                         __METHOD__
 200                 );
 201
 202                 // Check if user wants to use the default language
 203                 if ( $newLanguage === 'default' ) {
 204                         $newLanguage = null;
 205                 }
 206
 207                 // No change in language
 208                 if ( $newLanguage === $oldLanguage ) {
 209                         // Check if old language does not exist
 210                         if ( !$oldLanguage ) {
 211                                 return Status::newFatal( ApiMessage::create(
 212                                         [
 213                                                 'pagelang-unchanged-language-default',
 214                                                 wfEscapeWikiText( $title->getPrefixedText() )
 215                                         ],
 216                                         'pagelang-unchanged-language'
 217                                 ) );
 218                         }
 219                         return Status::newFatal(
 220                                 'pagelang-unchanged-language',
 221                                 wfEscapeWikiText( $title->getPrefixedText() ),
 222                                 $oldLanguage
 223                         );
 224                 }
 225
 226                 // Hardcoded [def] if the language is set to null
 227                 $logOld = $oldLanguage ? $oldLanguage : $defLang . '[def]';
 228                 $logNew = $newLanguage ? $newLanguage : $defLang . '[def]';
 229
 230                 // Writing new page language to database
 231                 $dbw->update(
 232                         'page',
 233                         [ 'page_lang' => $newLanguage ],
 234                         [
 235                                 'page_id' => $pageId,
 236                                 'page_lang' => $oldLanguage
 237                         ],
 238                         __METHOD__
 239                 );
 240
 241                 if ( !$dbw->affectedRows() ) {
 242                         return Status::newFatal( 'pagelang-db-failed' );
 243                 }
 244
 245                 // Logging change of language
 246                 $logParams = [
 247                         '4::oldlanguage' => $logOld,
 248                         '5::newlanguage' => $logNew
 249                 ];
 250                 $entry = new ManualLogEntry( 'pagelang', 'pagelang' );
 251                 $entry->setPerformer( $context->getUser() );
 252                 $entry->setTarget( $title );
 253                 $entry->setParameters( $logParams );
 254                 $entry->setComment( $reason );
 255                 $entry->setTags( $tags );
 256
 257                 $logid = $entry->insert();
 258                 $entry->publish( $logid );
 259
 260                 // Force re-render so that language-based content (parser functions etc.) gets updated
 261                 $title->invalidateCache();
 262
 263                 return Status::newGood( (object)[
 264                         'oldLanguage' => $logOld,
 265                         'newLanguage' => $logNew,
 266                         'logId' => $logid,
 267                 ] );
 268         }
 269
 270         public function onSuccess() {
 271                 // Success causes a redirect
 272                 $this->getOutput()->redirect( $this->goToUrl );
 273         }
 274
 275         function showLogFragment( $title ) {
 276                 $moveLogPage = new LogPage( 'pagelang' );
 277                 $out1 = Xml::element( 'h2', null, $moveLogPage->getName()->text() );
 278                 $out2 = '';
 279                 LogEventsList::showLogExtract( $out2, 'pagelang', $title );
 280                 return $out1 . $out2;
 281         }
 282
 283         /**
 284          * Return an array of subpages beginning with $search that this special page will accept.
 285          *
 286          * @param string $search Prefix to search for
 287          * @param int $limit Maximum number of results to return (usually 10)
 288          * @param int $offset Number of results to skip (usually 0)
 289          * @return string[] Matching subpages
 290          */
 291         public function prefixSearchSubpages( $search, $limit, $offset ) {
 292                 return $this->prefixSearchString( $search, $limit, $offset );
 293         }
 294
 295         protected function getGroupName() {
 296                 return 'pagetools';
 297         }
 298 }