includes/api/ApiParse.php

   1 <?php
   2 /**
   3  * Created on Dec 01, 2007
   4  *
   5  * Copyright © 2007 Yuri Astrakhan "<Firstname><Lastname>@gmail.com"
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  20  * http://www.gnu.org/copyleft/gpl.html
  21  *
  22  * @file
  23  */
  24
  25 /**
  26  * @ingroup API
  27  */
  28 class ApiParse extends ApiBase {
  29
  30         /** @var string $section */
  31         private $section = null;
  32
  33         /** @var Content $content */
  34         private $content = null;
  35
  36         /** @var Content $pstContent */
  37         private $pstContent = null;
  38
  39         public function execute() {
  40                 // The data is hot but user-dependent, like page views, so we set vary cookies
  41                 $this->getMain()->setCacheMode( 'anon-public-user-private' );
  42
  43                 // Get parameters
  44                 $params = $this->extractRequestParams();
  45                 $text = $params['text'];
  46                 $title = $params['title'];
  47                 if ( $title === null ) {
  48                         $titleProvided = false;
  49                         // A title is needed for parsing, so arbitrarily choose one
  50                         $title = 'API';
  51                 } else {
  52                         $titleProvided = true;
  53                 }
  54
  55                 $page = $params['page'];
  56                 $pageid = $params['pageid'];
  57                 $oldid = $params['oldid'];
  58
  59                 $model = $params['contentmodel'];
  60                 $format = $params['contentformat'];
  61
  62                 if ( !is_null( $page ) && ( !is_null( $text ) || $titleProvided ) ) {
  63                         $this->dieUsage(
  64                                 'The page parameter cannot be used together with the text and title parameters',
  65                                 'params'
  66                         );
  67                 }
  68
  69                 $prop = array_flip( $params['prop'] );
  70
  71                 if ( isset( $params['section'] ) ) {
  72                         $this->section = $params['section'];
  73                 } else {
  74                         $this->section = false;
  75                 }
  76
  77                 // The parser needs $wgTitle to be set, apparently the
  78                 // $title parameter in Parser::parse isn't enough *sigh*
  79                 // TODO: Does this still need $wgTitle?
  80                 global $wgParser, $wgTitle;
  81
  82                 // Currently unnecessary, code to act as a safeguard against any change
  83                 // in current behavior of uselang
  84                 $oldLang = null;
  85                 if ( isset( $params['uselang'] )
  86                         && $params['uselang'] != $this->getContext()->getLanguage()->getCode()
  87                 ) {
  88                         $oldLang = $this->getContext()->getLanguage(); // Backup language
  89                         $this->getContext()->setLanguage( Language::factory( $params['uselang'] ) );
  90                 }
  91
  92                 $redirValues = null;
  93
  94                 // Return result
  95                 $result = $this->getResult();
  96
  97                 if ( !is_null( $oldid ) || !is_null( $pageid ) || !is_null( $page ) ) {
  98                         if ( !is_null( $oldid ) ) {
  99                                 // Don't use the parser cache
 100                                 $rev = Revision::newFromID( $oldid );
 101                                 if ( !$rev ) {
 102                                         $this->dieUsage( "There is no revision ID $oldid", 'missingrev' );
 103                                 }
 104                                 if ( !$rev->userCan( Revision::DELETED_TEXT, $this->getUser() ) ) {
 105                                         $this->dieUsage( "You don't have permission to view deleted revisions", 'permissiondenied' );
 106                                 }
 107
 108                                 $titleObj = $rev->getTitle();
 109                                 $wgTitle = $titleObj;
 110                                 $pageObj = WikiPage::factory( $titleObj );
 111                                 $popts = $this->makeParserOptions( $pageObj, $params );
 112
 113                                 // If for some reason the "oldid" is actually the current revision, it may be cached
 114                                 if ( $rev->isCurrent() ) {
 115                                         // May get from/save to parser cache
 116                                         $p_result = $this->getParsedContent( $pageObj, $popts,
 117                                                 $pageid, isset( $prop['wikitext'] ) );
 118                                 } else { // This is an old revision, so get the text differently
 119                                         $this->content = $rev->getContent( Revision::FOR_THIS_USER, $this->getUser() );
 120
 121                                         if ( $this->section !== false ) {
 122                                                 $this->content = $this->getSectionContent( $this->content, 'r' . $rev->getId() );
 123                                         }
 124
 125                                         // Should we save old revision parses to the parser cache?
 126                                         $p_result = $this->content->getParserOutput( $titleObj, $rev->getId(), $popts );
 127                                 }
 128                         } else { // Not $oldid, but $pageid or $page
 129                                 if ( $params['redirects'] ) {
 130                                         $reqParams = array(
 131                                                 'action' => 'query',
 132                                                 'redirects' => '',
 133                                         );
 134                                         if ( !is_null( $pageid ) ) {
 135                                                 $reqParams['pageids'] = $pageid;
 136                                         } else { // $page
 137                                                 $reqParams['titles'] = $page;
 138                                         }
 139                                         $req = new FauxRequest( $reqParams );
 140                                         $main = new ApiMain( $req );
 141                                         $main->execute();
 142                                         $data = $main->getResultData();
 143                                         $redirValues = isset( $data['query']['redirects'] )
 144                                                 ? $data['query']['redirects']
 145                                                 : array();
 146                                         $to = $page;
 147                                         foreach ( (array)$redirValues as $r ) {
 148                                                 $to = $r['to'];
 149                                         }
 150                                         $pageParams = array( 'title' => $to );
 151                                 } elseif ( !is_null( $pageid ) ) {
 152                                         $pageParams = array( 'pageid' => $pageid );
 153                                 } else { // $page
 154                                         $pageParams = array( 'title' => $page );
 155                                 }
 156
 157                                 $pageObj = $this->getTitleOrPageId( $pageParams, 'fromdb' );
 158                                 $titleObj = $pageObj->getTitle();
 159                                 if ( !$titleObj || !$titleObj->exists() ) {
 160                                         $this->dieUsage( "The page you specified doesn't exist", 'missingtitle' );
 161                                 }
 162                                 $wgTitle = $titleObj;
 163
 164                                 if ( isset( $prop['revid'] ) ) {
 165                                         $oldid = $pageObj->getLatest();
 166                                 }
 167
 168                                 $popts = $this->makeParserOptions( $pageObj, $params );
 169
 170                                 // Potentially cached
 171                                 $p_result = $this->getParsedContent( $pageObj, $popts, $pageid,
 172                                         isset( $prop['wikitext'] ) );
 173                         }
 174                 } else { // Not $oldid, $pageid, $page. Hence based on $text
 175                         $titleObj = Title::newFromText( $title );
 176                         if ( !$titleObj || $titleObj->isExternal() ) {
 177                                 $this->dieUsageMsg( array( 'invalidtitle', $title ) );
 178                         }
 179                         $wgTitle = $titleObj;
 180                         if ( $titleObj->canExist() ) {
 181                                 $pageObj = WikiPage::factory( $titleObj );
 182                         } else {
 183                                 // Do like MediaWiki::initializeArticle()
 184                                 $article = Article::newFromTitle( $titleObj, $this->getContext() );
 185                                 $pageObj = $article->getPage();
 186                         }
 187
 188                         $popts = $this->makeParserOptions( $pageObj, $params );
 189                         $textProvided = !is_null( $text );
 190
 191                         if ( !$textProvided ) {
 192                                 if ( $titleProvided && ( $prop || $params['generatexml'] ) ) {
 193                                         $this->setWarning(
 194                                                 "'title' used without 'text', and parsed page properties were requested " .
 195                                                 "(did you mean to use 'page' instead of 'title'?)"
 196                                         );
 197                                 }
 198                                 // Prevent warning from ContentHandler::makeContent()
 199                                 $text = '';
 200                         }
 201
 202                         // If we are parsing text, do not use the content model of the default
 203                         // API title, but default to wikitext to keep BC.
 204                         if ( $textProvided && !$titleProvided && is_null( $model ) ) {
 205                                 $model = CONTENT_MODEL_WIKITEXT;
 206                                 $this->setWarning( "No 'title' or 'contentmodel' was given, assuming $model." );
 207                         }
 208
 209                         try {
 210                                 $this->content = ContentHandler::makeContent( $text, $titleObj, $model, $format );
 211                         } catch ( MWContentSerializationException $ex ) {
 212                                 $this->dieUsage( $ex->getMessage(), 'parseerror' );
 213                         }
 214
 215                         if ( $this->section !== false ) {
 216                                 $this->content = $this->getSectionContent( $this->content, $titleObj->getText() );
 217                         }
 218
 219                         if ( $params['pst'] || $params['onlypst'] ) {
 220                                 $this->pstContent = $this->content->preSaveTransform( $titleObj, $this->getUser(), $popts );
 221                         }
 222                         if ( $params['onlypst'] ) {
 223                                 // Build a result and bail out
 224                                 $result_array = array();
 225                                 $result_array['text'] = array();
 226                                 ApiResult::setContent( $result_array['text'], $this->pstContent->serialize( $format ) );
 227                                 if ( isset( $prop['wikitext'] ) ) {
 228                                         $result_array['wikitext'] = array();
 229                                         ApiResult::setContent( $result_array['wikitext'], $this->content->serialize( $format ) );
 230                                 }
 231                                 $result->addValue( null, $this->getModuleName(), $result_array );
 232
 233                                 return;
 234                         }
 235
 236                         // Not cached (save or load)
 237                         if ( $params['pst'] ) {
 238                                 $p_result = $this->pstContent->getParserOutput( $titleObj, null, $popts );
 239                         } else {
 240                                 $p_result = $this->content->getParserOutput( $titleObj, null, $popts );
 241                         }
 242                 }
 243
 244                 $result_array = array();
 245
 246                 $result_array['title'] = $titleObj->getPrefixedText();
 247
 248                 if ( !is_null( $oldid ) ) {
 249                         $result_array['revid'] = intval( $oldid );
 250                 }
 251
 252                 if ( $params['redirects'] && !is_null( $redirValues ) ) {
 253                         $result_array['redirects'] = $redirValues;
 254                 }
 255
 256                 if ( $params['disabletoc'] ) {
 257                         $p_result->setTOCEnabled( false );
 258                 }
 259
 260                 if ( isset( $prop['text'] ) ) {
 261                         $result_array['text'] = array();
 262                         ApiResult::setContent( $result_array['text'], $p_result->getText() );
 263                 }
 264
 265                 if ( !is_null( $params['summary'] ) ) {
 266                         $result_array['parsedsummary'] = array();
 267                         ApiResult::setContent(
 268                                 $result_array['parsedsummary'],
 269                                 Linker::formatComment( $params['summary'], $titleObj )
 270                         );
 271                 }
 272
 273                 if ( isset( $prop['langlinks'] ) || isset( $prop['languageshtml'] ) ) {
 274                         $langlinks = $p_result->getLanguageLinks();
 275
 276                         if ( $params['effectivelanglinks'] ) {
 277                                 // Link flags are ignored for now, but may in the future be
 278                                 // included in the result.
 279                                 $linkFlags = array();
 280                                 wfRunHooks( 'LanguageLinks', array( $titleObj, &$langlinks, &$linkFlags ) );
 281                         }
 282                 } else {
 283                         $langlinks = false;
 284                 }
 285
 286                 if ( isset( $prop['langlinks'] ) ) {
 287                         $result_array['langlinks'] = $this->formatLangLinks( $langlinks );
 288                 }
 289                 if ( isset( $prop['languageshtml'] ) ) {
 290                         $languagesHtml = $this->languagesHtml( $langlinks );
 291
 292                         $result_array['languageshtml'] = array();
 293                         ApiResult::setContent( $result_array['languageshtml'], $languagesHtml );
 294                 }
 295                 if ( isset( $prop['categories'] ) ) {
 296                         $result_array['categories'] = $this->formatCategoryLinks( $p_result->getCategories() );
 297                 }
 298                 if ( isset( $prop['categorieshtml'] ) ) {
 299                         $categoriesHtml = $this->categoriesHtml( $p_result->getCategories() );
 300                         $result_array['categorieshtml'] = array();
 301                         ApiResult::setContent( $result_array['categorieshtml'], $categoriesHtml );
 302                 }
 303                 if ( isset( $prop['links'] ) ) {
 304                         $result_array['links'] = $this->formatLinks( $p_result->getLinks() );
 305                 }
 306                 if ( isset( $prop['templates'] ) ) {
 307                         $result_array['templates'] = $this->formatLinks( $p_result->getTemplates() );
 308                 }
 309                 if ( isset( $prop['images'] ) ) {
 310                         $result_array['images'] = array_keys( $p_result->getImages() );
 311                 }
 312                 if ( isset( $prop['externallinks'] ) ) {
 313                         $result_array['externallinks'] = array_keys( $p_result->getExternalLinks() );
 314                 }
 315                 if ( isset( $prop['sections'] ) ) {
 316                         $result_array['sections'] = $p_result->getSections();
 317                 }
 318
 319                 if ( isset( $prop['displaytitle'] ) ) {
 320                         $result_array['displaytitle'] = $p_result->getDisplayTitle() ?
 321                                 $p_result->getDisplayTitle() :
 322                                 $titleObj->getPrefixedText();
 323                 }
 324
 325                 if ( isset( $prop['headitems'] ) || isset( $prop['headhtml'] ) ) {
 326                         $context = $this->getContext();
 327                         $context->setTitle( $titleObj );
 328                         $context->getOutput()->addParserOutputMetadata( $p_result );
 329
 330                         if ( isset( $prop['headitems'] ) ) {
 331                                 $headItems = $this->formatHeadItems( $p_result->getHeadItems() );
 332
 333                                 $css = $this->formatCss( $context->getOutput()->buildCssLinksArray() );
 334
 335                                 $scripts = array( $context->getOutput()->getHeadScripts() );
 336
 337                                 $result_array['headitems'] = array_merge( $headItems, $css, $scripts );
 338                         }
 339
 340                         if ( isset( $prop['headhtml'] ) ) {
 341                                 $result_array['headhtml'] = array();
 342                                 ApiResult::setContent(
 343                                         $result_array['headhtml'],
 344                                         $context->getOutput()->headElement( $context->getSkin() )
 345                                 );
 346                         }
 347                 }
 348
 349                 if ( isset( $prop['modules'] ) ) {
 350                         $result_array['modules'] = array_values( array_unique( $p_result->getModules() ) );
 351                         $result_array['modulescripts'] = array_values( array_unique( $p_result->getModuleScripts() ) );
 352                         $result_array['modulestyles'] = array_values( array_unique( $p_result->getModuleStyles() ) );
 353                         $result_array['modulemessages'] = array_values( array_unique( $p_result->getModuleMessages() ) );
 354                 }
 355
 356                 if ( isset( $prop['iwlinks'] ) ) {
 357                         $result_array['iwlinks'] = $this->formatIWLinks( $p_result->getInterwikiLinks() );
 358                 }
 359
 360                 if ( isset( $prop['wikitext'] ) ) {
 361                         $result_array['wikitext'] = array();
 362                         ApiResult::setContent( $result_array['wikitext'], $this->content->serialize( $format ) );
 363                         if ( !is_null( $this->pstContent ) ) {
 364                                 $result_array['psttext'] = array();
 365                                 ApiResult::setContent( $result_array['psttext'], $this->pstContent->serialize( $format ) );
 366                         }
 367                 }
 368                 if ( isset( $prop['properties'] ) ) {
 369                         $result_array['properties'] = $this->formatProperties( $p_result->getProperties() );
 370                 }
 371
 372                 if ( isset( $prop['limitreportdata'] ) ) {
 373                         $result_array['limitreportdata'] =
 374                                 $this->formatLimitReportData( $p_result->getLimitReportData() );
 375                 }
 376                 if ( isset( $prop['limitreporthtml'] ) ) {
 377                         $limitreportHtml = EditPage::getPreviewLimitReport( $p_result );
 378                         $result_array['limitreporthtml'] = array();
 379                         ApiResult::setContent( $result_array['limitreporthtml'], $limitreportHtml );
 380                 }
 381
 382                 if ( $params['generatexml'] ) {
 383                         if ( $this->content->getModel() != CONTENT_MODEL_WIKITEXT ) {
 384                                 $this->dieUsage( "generatexml is only supported for wikitext content", "notwikitext" );
 385                         }
 386
 387                         $wgParser->startExternalParse( $titleObj, $popts, OT_PREPROCESS );
 388                         $dom = $wgParser->preprocessToDom( $this->content->getNativeData() );
 389                         if ( is_callable( array( $dom, 'saveXML' ) ) ) {
 390                                 $xml = $dom->saveXML();
 391                         } else {
 392                                 $xml = $dom->__toString();
 393                         }
 394                         $result_array['parsetree'] = array();
 395                         ApiResult::setContent( $result_array['parsetree'], $xml );
 396                 }
 397
 398                 $result_mapping = array(
 399                         'redirects' => 'r',
 400                         'langlinks' => 'll',
 401                         'categories' => 'cl',
 402                         'links' => 'pl',
 403                         'templates' => 'tl',
 404                         'images' => 'img',
 405                         'externallinks' => 'el',
 406                         'iwlinks' => 'iw',
 407                         'sections' => 's',
 408                         'headitems' => 'hi',
 409                         'modules' => 'm',
 410                         'modulescripts' => 'm',
 411                         'modulestyles' => 'm',
 412                         'modulemessages' => 'm',
 413                         'properties' => 'pp',
 414                         'limitreportdata' => 'lr',
 415                 );
 416                 $this->setIndexedTagNames( $result_array, $result_mapping );
 417                 $result->addValue( null, $this->getModuleName(), $result_array );
 418
 419                 if ( !is_null( $oldLang ) ) {
 420                         $this->getContext()->setLanguage( $oldLang ); // Reset language to $oldLang
 421                 }
 422         }
 423
 424         /**
 425          * Constructs a ParserOptions object
 426          *
 427          * @param WikiPage $pageObj
 428          * @param array $params
 429          *
 430          * @return ParserOptions
 431          */
 432         protected function makeParserOptions( WikiPage $pageObj, array $params ) {
 433                 wfProfileIn( __METHOD__ );
 434
 435                 $popts = $pageObj->makeParserOptions( $this->getContext() );
 436                 $popts->enableLimitReport( !$params['disablepp'] );
 437                 $popts->setIsPreview( $params['preview'] || $params['sectionpreview'] );
 438                 $popts->setIsSectionPreview( $params['sectionpreview'] );
 439                 $popts->setEditSection( !$params['disableeditsection'] );
 440
 441                 wfProfileOut( __METHOD__ );
 442
 443                 return $popts;
 444         }
 445
 446         /**
 447          * @param WikiPage $page
 448          * @param ParserOptions $popts
 449          * @param int $pageId
 450          * @param bool $getWikitext
 451          * @return ParserOutput
 452          */
 453         private function getParsedContent( WikiPage $page, $popts, $pageId = null, $getWikitext = false ) {
 454                 $this->content = $page->getContent( Revision::RAW ); //XXX: really raw?
 455
 456                 if ( $this->section !== false && $this->content !== null ) {
 457                         $this->content = $this->getSectionContent(
 458                                 $this->content,
 459                                 !is_null( $pageId ) ? 'page id ' . $pageId : $page->getTitle()->getText()
 460                         );
 461
 462                         // Not cached (save or load)
 463                         return $this->content->getParserOutput( $page->getTitle(), null, $popts );
 464                 }
 465
 466                 // Try the parser cache first
 467                 // getParserOutput will save to Parser cache if able
 468                 $pout = $page->getParserOutput( $popts );
 469                 if ( !$pout ) {
 470                         $this->dieUsage( "There is no revision ID {$page->getLatest()}", 'missingrev' );
 471                 }
 472                 if ( $getWikitext ) {
 473                         $this->content = $page->getContent( Revision::RAW );
 474                 }
 475
 476                 return $pout;
 477         }
 478
 479         private function getSectionContent( Content $content, $what ) {
 480                 // Not cached (save or load)
 481                 $section = $content->getSection( $this->section );
 482                 if ( $section === false ) {
 483                         $this->dieUsage( "There is no section {$this->section} in " . $what, 'nosuchsection' );
 484                 }
 485                 if ( $section === null ) {
 486                         $this->dieUsage( "Sections are not supported by " . $what, 'nosuchsection' );
 487                         $section = false;
 488                 }
 489
 490                 return $section;
 491         }
 492
 493         private function formatLangLinks( $links ) {
 494                 $result = array();
 495                 foreach ( $links as $link ) {
 496                         $entry = array();
 497                         $bits = explode( ':', $link, 2 );
 498                         $title = Title::newFromText( $link );
 499
 500                         $entry['lang'] = $bits[0];
 501                         if ( $title ) {
 502                                 $entry['url'] = wfExpandUrl( $title->getFullURL(), PROTO_CURRENT );
 503                                 // localised language name in user language (maybe set by uselang=)
 504                                 $entry['langname'] = Language::fetchLanguageName(
 505                                         $title->getInterwiki(),
 506                                         $this->getLanguage()->getCode()
 507                                 );
 508
 509                                 // native language name
 510                                 $entry['autonym'] = Language::fetchLanguageName( $title->getInterwiki() );
 511                         }
 512                         ApiResult::setContent( $entry, $bits[1] );
 513                         $result[] = $entry;
 514                 }
 515
 516                 return $result;
 517         }
 518
 519         private function formatCategoryLinks( $links ) {
 520                 $result = array();
 521
 522                 if ( !$links ) {
 523                         return $result;
 524                 }
 525
 526                 // Fetch hiddencat property
 527                 $lb = new LinkBatch;
 528                 $lb->setArray( array( NS_CATEGORY => $links ) );
 529                 $db = $this->getDB();
 530                 $res = $db->select( array( 'page', 'page_props' ),
 531                         array( 'page_title', 'pp_propname' ),
 532                         $lb->constructSet( 'page', $db ),
 533                         __METHOD__,
 534                         array(),
 535                         array( 'page_props' => array(
 536                                 'LEFT JOIN', array( 'pp_propname' => 'hiddencat', 'pp_page = page_id' )
 537                         ) )
 538                 );
 539                 $hiddencats = array();
 540                 foreach ( $res as $row ) {
 541                         $hiddencats[$row->page_title] = isset( $row->pp_propname );
 542                 }
 543
 544                 foreach ( $links as $link => $sortkey ) {
 545                         $entry = array();
 546                         $entry['sortkey'] = $sortkey;
 547                         ApiResult::setContent( $entry, $link );
 548                         if ( !isset( $hiddencats[$link] ) ) {
 549                                 $entry['missing'] = '';
 550                         } elseif ( $hiddencats[$link] ) {
 551                                 $entry['hidden'] = '';
 552                         }
 553                         $result[] = $entry;
 554                 }
 555
 556                 return $result;
 557         }
 558
 559         private function categoriesHtml( $categories ) {
 560                 $context = $this->getContext();
 561                 $context->getOutput()->addCategoryLinks( $categories );
 562
 563                 return $context->getSkin()->getCategories();
 564         }
 565
 566         /**
 567          * @deprecated since 1.18 No modern skin generates language links this way,
 568          * please use language links data to generate your own HTML.
 569          * @param array $languages
 570          * @return string
 571          */
 572         private function languagesHtml( $languages ) {
 573                 wfDeprecated( __METHOD__, '1.18' );
 574                 $this->setWarning( '"action=parse&prop=languageshtml" is deprecated ' .
 575                         'and will be removed in MediaWiki 1.24. Use "prop=langlinks" ' .
 576                         'to generate your own HTML.' );
 577
 578                 global $wgContLang;
 579
 580                 if ( $this->getConfig()->get( 'HideInterlanguageLinks' ) || count( $languages ) == 0 ) {
 581                         return '';
 582                 }
 583
 584                 $s = htmlspecialchars( wfMessage( 'otherlanguages' )->text() .
 585                         wfMessage( 'colon-separator' )->text() );
 586
 587                 $langs = array();
 588                 foreach ( $languages as $l ) {
 589                         $nt = Title::newFromText( $l );
 590                         $text = Language::fetchLanguageName( $nt->getInterwiki() );
 591
 592                         $langs[] = Html::element( 'a',
 593                                 array( 'href' => $nt->getFullURL(), 'title' => $nt->getText(), 'class' => 'external' ),
 594                                 $text == '' ? $l : $text );
 595                 }
 596
 597                 $s .= implode( wfMessage( 'pipe-separator' )->escaped(), $langs );
 598
 599                 if ( $wgContLang->isRTL() ) {
 600                         $s = Html::rawElement( 'span', array( 'dir' => 'LTR' ), $s );
 601                 }
 602
 603                 return $s;
 604         }
 605
 606         private function formatLinks( $links ) {
 607                 $result = array();
 608                 foreach ( $links as $ns => $nslinks ) {
 609                         foreach ( $nslinks as $title => $id ) {
 610                                 $entry = array();
 611                                 $entry['ns'] = $ns;
 612                                 ApiResult::setContent( $entry, Title::makeTitle( $ns, $title )->getFullText() );
 613                                 if ( $id != 0 ) {
 614                                         $entry['exists'] = '';
 615                                 }
 616                                 $result[] = $entry;
 617                         }
 618                 }
 619
 620                 return $result;
 621         }
 622
 623         private function formatIWLinks( $iw ) {
 624                 $result = array();
 625                 foreach ( $iw as $prefix => $titles ) {
 626                         foreach ( array_keys( $titles ) as $title ) {
 627                                 $entry = array();
 628                                 $entry['prefix'] = $prefix;
 629
 630                                 $title = Title::newFromText( "{$prefix}:{$title}" );
 631                                 if ( $title ) {
 632                                         $entry['url'] = wfExpandUrl( $title->getFullURL(), PROTO_CURRENT );
 633                                 }
 634
 635                                 ApiResult::setContent( $entry, $title->getFullText() );
 636                                 $result[] = $entry;
 637                         }
 638                 }
 639
 640                 return $result;
 641         }
 642
 643         private function formatHeadItems( $headItems ) {
 644                 $result = array();
 645                 foreach ( $headItems as $tag => $content ) {
 646                         $entry = array();
 647                         $entry['tag'] = $tag;
 648                         ApiResult::setContent( $entry, $content );
 649                         $result[] = $entry;
 650                 }
 651
 652                 return $result;
 653         }
 654
 655         private function formatProperties( $properties ) {
 656                 $result = array();
 657                 foreach ( $properties as $name => $value ) {
 658                         $entry = array();
 659                         $entry['name'] = $name;
 660                         ApiResult::setContent( $entry, $value );
 661                         $result[] = $entry;
 662                 }
 663
 664                 return $result;
 665         }
 666
 667         private function formatCss( $css ) {
 668                 $result = array();
 669                 foreach ( $css as $file => $link ) {
 670                         $entry = array();
 671                         $entry['file'] = $file;
 672                         ApiResult::setContent( $entry, $link );
 673                         $result[] = $entry;
 674                 }
 675
 676                 return $result;
 677         }
 678
 679         private function formatLimitReportData( $limitReportData ) {
 680                 $result = array();
 681                 $apiResult = $this->getResult();
 682
 683                 foreach ( $limitReportData as $name => $value ) {
 684                         $entry = array();
 685                         $entry['name'] = $name;
 686                         if ( !is_array( $value ) ) {
 687                                 $value = array( $value );
 688                         }
 689                         $apiResult->setIndexedTagName( $value, 'param' );
 690                         $apiResult->setIndexedTagName_recursive( $value, 'param' );
 691                         $entry = array_merge( $entry, $value );
 692                         $result[] = $entry;
 693                 }
 694
 695                 return $result;
 696         }
 697
 698         private function setIndexedTagNames( &$array, $mapping ) {
 699                 foreach ( $mapping as $key => $name ) {
 700                         if ( isset( $array[$key] ) ) {
 701                                 $this->getResult()->setIndexedTagName( $array[$key], $name );
 702                         }
 703                 }
 704         }
 705
 706         public function getAllowedParams() {
 707                 return array(
 708                         'title' => null,
 709                         'text' => null,
 710                         'summary' => null,
 711                         'page' => null,
 712                         'pageid' => array(
 713                                 ApiBase::PARAM_TYPE => 'integer',
 714                         ),
 715                         'redirects' => false,
 716                         'oldid' => array(
 717                                 ApiBase::PARAM_TYPE => 'integer',
 718                         ),
 719                         'prop' => array(
 720                                 ApiBase::PARAM_DFLT => 'text|langlinks|categories|links|templates|' .
 721                                         'images|externallinks|sections|revid|displaytitle|iwlinks|properties',
 722                                 ApiBase::PARAM_ISMULTI => true,
 723                                 ApiBase::PARAM_TYPE => array(
 724                                         'text',
 725                                         'langlinks',
 726                                         'languageshtml',
 727                                         'categories',
 728                                         'categorieshtml',
 729                                         'links',
 730                                         'templates',
 731                                         'images',
 732                                         'externallinks',
 733                                         'sections',
 734                                         'revid',
 735                                         'displaytitle',
 736                                         'headitems',
 737                                         'headhtml',
 738                                         'modules',
 739                                         'iwlinks',
 740                                         'wikitext',
 741                                         'properties',
 742                                         'limitreportdata',
 743                                         'limitreporthtml',
 744                                 )
 745                         ),
 746                         'pst' => false,
 747                         'onlypst' => false,
 748                         'effectivelanglinks' => false,
 749                         'uselang' => null,
 750                         'section' => null,
 751                         'disablepp' => false,
 752                         'disableeditsection' => false,
 753                         'generatexml' => false,
 754                         'preview' => false,
 755                         'sectionpreview' => false,
 756                         'disabletoc' => false,
 757                         'contentformat' => array(
 758                                 ApiBase::PARAM_TYPE => ContentHandler::getAllContentFormats(),
 759                         ),
 760                         'contentmodel' => array(
 761                                 ApiBase::PARAM_TYPE => ContentHandler::getContentModels(),
 762                         )
 763                 );
 764         }
 765
 766         public function getParamDescription() {
 767                 $p = $this->getModulePrefix();
 768                 $wikitext = CONTENT_MODEL_WIKITEXT;
 769
 770                 return array(
 771                         'text' => "Text to parse. Use {$p}title or {$p}contentmodel to control the content model",
 772                         'summary' => 'Summary to parse',
 773                         'redirects' => "If the {$p}page or the {$p}pageid parameter is set to a redirect, resolve it",
 774                         'title' => "Title of page the text belongs to. " .
 775                                 "If omitted, {$p}contentmodel must be specified, and \"API\" will be used as the title",
 776                         'page' => "Parse the content of this page. Cannot be used together with {$p}text and {$p}title",
 777                         'pageid' => "Parse the content of this page. Overrides {$p}page",
 778                         'oldid' => "Parse the content of this revision. Overrides {$p}page and {$p}pageid",
 779                         'prop' => array(
 780                                 'Which pieces of information to get',
 781                                 ' text           - Gives the parsed text of the wikitext',
 782                                 ' langlinks      - Gives the language links in the parsed wikitext',
 783                                 ' categories     - Gives the categories in the parsed wikitext',
 784                                 ' categorieshtml - Gives the HTML version of the categories',
 785                                 ' languageshtml  - DEPRECATED. Will be removed in MediaWiki 1.24.',
 786                                 '                  Gives the HTML version of the language links',
 787                                 ' links          - Gives the internal links in the parsed wikitext',
 788                                 ' templates      - Gives the templates in the parsed wikitext',
 789                                 ' images         - Gives the images in the parsed wikitext',
 790                                 ' externallinks  - Gives the external links in the parsed wikitext',
 791                                 ' sections       - Gives the sections in the parsed wikitext',
 792                                 ' revid          - Adds the revision ID of the parsed page',
 793                                 ' displaytitle   - Adds the title of the parsed wikitext',
 794                                 ' headitems      - Gives items to put in the <head> of the page',
 795                                 ' headhtml       - Gives parsed <head> of the page',
 796                                 ' modules        - Gives the ResourceLoader modules used on the page',
 797                                 ' iwlinks        - Gives interwiki links in the parsed wikitext',
 798                                 ' wikitext       - Gives the original wikitext that was parsed',
 799                                 ' properties     - Gives various properties defined in the parsed wikitext',
 800                                 ' limitreportdata - Gives the limit report in a structured way.',
 801                                 "                   Gives no data, when {$p}disablepp is set.",
 802                                 ' limitreporthtml - Gives the HTML version of the limit report.',
 803                                 "                   Gives no data, when {$p}disablepp is set.",
 804                         ),
 805                         'effectivelanglinks' => array(
 806                                 'Includes language links supplied by extensions',
 807                                 '(for use with prop=langlinks|languageshtml)',
 808                         ),
 809                         'pst' => array(
 810                                 'Do a pre-save transform on the input before parsing it',
 811                                 "Only valid when used with {$p}text",
 812                         ),
 813                         'onlypst' => array(
 814                                 'Do a pre-save transform (PST) on the input, but don\'t parse it',
 815                                 'Returns the same wikitext, after a PST has been applied.',
 816                                 "Only valid when used with {$p}text",
 817                         ),
 818                         'uselang' => 'Which language to parse the request in',
 819                         'section' => 'Only retrieve the content of this section number',
 820                         'disablepp' => 'Disable the PP Report from the parser output',
 821                         'disableeditsection' => 'Disable edit section links from the parser output',
 822                         'generatexml' => "Generate XML parse tree (requires contentmodel=$wikitext)",
 823                         'preview' => 'Parse in preview mode',
 824                         'sectionpreview' => 'Parse in section preview mode (enables preview mode too)',
 825                         'disabletoc' => 'Disable table of contents in output',
 826                         'contentformat' => array(
 827                                 'Content serialization format used for the input text',
 828                                 "Only valid when used with {$p}text",
 829                         ),
 830                         'contentmodel' => array(
 831                                 "Content model of the input text. If omitted, ${p}title must be specified, " .
 832                                         "and default will be the model of the specified ${p}title",
 833                                 "Only valid when used with {$p}text",
 834                         ),
 835                 );
 836         }
 837
 838         public function getDescription() {
 839                 $p = $this->getModulePrefix();
 840
 841                 return array(
 842                         'Parses content and returns parser output.',
 843                         'See the various prop-Modules of action=query to get information from the current' .
 844                                 'version of a page.',
 845                         'There are several ways to specify the text to parse:',
 846                         "1) Specify a page or revision, using {$p}page, {$p}pageid, or {$p}oldid.",
 847                         "2) Specify content explicitly, using {$p}text, {$p}title, and {$p}contentmodel.",
 848                         "3) Specify only a summary to parse. {$p}prop should be given an empty value.",
 849                 );
 850         }
 851
 852         public function getPossibleErrors() {
 853                 return array_merge( parent::getPossibleErrors(), array(
 854                         array(
 855                                 'code' => 'params',
 856                                 'info' => 'The page parameter cannot be used together with the text and title parameters'
 857                         ),
 858                         array( 'code' => 'missingrev', 'info' => 'There is no revision ID oldid' ),
 859                         array(
 860                                 'code' => 'permissiondenied',
 861                                 'info' => 'You don\'t have permission to view deleted revisions'
 862                         ),
 863                         array( 'code' => 'missingtitle', 'info' => 'The page you specified doesn\'t exist' ),
 864                         array( 'code' => 'nosuchsection', 'info' => 'There is no section sectionnumber in page' ),
 865                         array( 'nosuchpageid' ),
 866                         array( 'invalidtitle', 'title' ),
 867                         array( 'code' => 'parseerror', 'info' => 'Failed to parse the given text.' ),
 868                         array(
 869                                 'code' => 'notwikitext',
 870                                 'info' => 'The requested operation is only supported on wikitext content.'
 871                         ),
 872                 ) );
 873         }
 874
 875         public function getExamples() {
 876                 return array(
 877                         'api.php?action=parse&page=Project:Sandbox' => 'Parse a page',
 878                         'api.php?action=parse&text={{Project:Sandbox}}&contentmodel=wikitext' => 'Parse wikitext',
 879                         'api.php?action=parse&text={{PAGENAME}}&title=Test'
 880                                 => 'Parse wikitext, specifying the page title',
 881                         'api.php?action=parse&summary=Some+[[link]]&prop=' => 'Parse a summary',
 882                 );
 883         }
 884
 885         public function getHelpUrls() {
 886                 return 'https://www.mediawiki.org/wiki/API:Parsing_wikitext#parse';
 887         }
 888 }