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 = $params['section'];
  73                         if ( !preg_match( '/^((T-)?\d+|new)$/', $this->section ) ) {
  74                                 $this->dieUsage(
  75                                         "The section parameter must be a valid section id or 'new'", "invalidsection"
  76                                 );
  77                         }
  78                 } else {
  79                         $this->section = false;
  80                 }
  81
  82                 // The parser needs $wgTitle to be set, apparently the
  83                 // $title parameter in Parser::parse isn't enough *sigh*
  84                 // TODO: Does this still need $wgTitle?
  85                 global $wgParser, $wgTitle;
  86
  87                 $redirValues = null;
  88
  89                 // Return result
  90                 $result = $this->getResult();
  91
  92                 if ( !is_null( $oldid ) || !is_null( $pageid ) || !is_null( $page ) ) {
  93                         if ( $this->section === 'new' ) {
  94                                         $this->dieUsage(
  95                                                 'section=new cannot be combined with oldid, pageid or page parameters. ' .
  96                                                 'Please use text', 'params'
  97                                         );
  98                         }
  99                         if ( !is_null( $oldid ) ) {
 100                                 // Don't use the parser cache
 101                                 $rev = Revision::newFromId( $oldid );
 102                                 if ( !$rev ) {
 103                                         $this->dieUsage( "There is no revision ID $oldid", 'missingrev' );
 104                                 }
 105                                 if ( !$rev->userCan( Revision::DELETED_TEXT, $this->getUser() ) ) {
 106                                         $this->dieUsage( "You don't have permission to view deleted revisions", 'permissiondenied' );
 107                                 }
 108
 109                                 $titleObj = $rev->getTitle();
 110                                 $wgTitle = $titleObj;
 111                                 $pageObj = WikiPage::factory( $titleObj );
 112                                 $popts = $this->makeParserOptions( $pageObj, $params );
 113
 114                                 // If for some reason the "oldid" is actually the current revision, it may be cached
 115                                 // Deliberately comparing $pageObj->getLatest() with $rev->getId(), rather than
 116                                 // checking $rev->isCurrent(), because $pageObj is what actually ends up being used,
 117                                 // and if its ->getLatest() is outdated, $rev->isCurrent() won't tell us that.
 118                                 if ( $rev->getId() == $pageObj->getLatest() ) {
 119                                         // May get from/save to parser cache
 120                                         $p_result = $this->getParsedContent( $pageObj, $popts,
 121                                                 $pageid, isset( $prop['wikitext'] ) );
 122                                 } else { // This is an old revision, so get the text differently
 123                                         $this->content = $rev->getContent( Revision::FOR_THIS_USER, $this->getUser() );
 124
 125                                         if ( $this->section !== false ) {
 126                                                 $this->content = $this->getSectionContent( $this->content, 'r' . $rev->getId() );
 127                                         }
 128
 129                                         // Should we save old revision parses to the parser cache?
 130                                         $p_result = $this->content->getParserOutput( $titleObj, $rev->getId(), $popts );
 131                                 }
 132                         } else { // Not $oldid, but $pageid or $page
 133                                 if ( $params['redirects'] ) {
 134                                         $reqParams = array(
 135                                                 'redirects' => '',
 136                                         );
 137                                         if ( !is_null( $pageid ) ) {
 138                                                 $reqParams['pageids'] = $pageid;
 139                                         } else { // $page
 140                                                 $reqParams['titles'] = $page;
 141                                         }
 142                                         $req = new FauxRequest( $reqParams );
 143                                         $main = new ApiMain( $req );
 144                                         $pageSet = new ApiPageSet( $main );
 145                                         $pageSet->execute();
 146                                         $redirValues = $pageSet->getRedirectTitlesAsResult( $this->getResult() );
 147
 148                                         $to = $page;
 149                                         foreach ( $pageSet->getRedirectTitles() as $title ) {
 150                                                 $to = $title->getFullText();
 151                                         }
 152                                         $pageParams = array( 'title' => $to );
 153                                 } elseif ( !is_null( $pageid ) ) {
 154                                         $pageParams = array( 'pageid' => $pageid );
 155                                 } else { // $page
 156                                         $pageParams = array( 'title' => $page );
 157                                 }
 158
 159                                 $pageObj = $this->getTitleOrPageId( $pageParams, 'fromdb' );
 160                                 $titleObj = $pageObj->getTitle();
 161                                 if ( !$titleObj || !$titleObj->exists() ) {
 162                                         $this->dieUsage( "The page you specified doesn't exist", 'missingtitle' );
 163                                 }
 164                                 $wgTitle = $titleObj;
 165
 166                                 if ( isset( $prop['revid'] ) ) {
 167                                         $oldid = $pageObj->getLatest();
 168                                 }
 169
 170                                 $popts = $this->makeParserOptions( $pageObj, $params );
 171
 172                                 // Don't pollute the parser cache when setting options that aren't
 173                                 // in ParserOptions::optionsHash()
 174                                 /// @todo: This should be handled closer to the actual cache instead of here, see T110269
 175                                 $suppressCache =
 176                                         $params['disablepp'] ||
 177                                         $params['disablelimitreport'] ||
 178                                         $params['preview'] ||
 179                                         $params['sectionpreview'] ||
 180                                         $params['disabletidy'];
 181
 182                                 if ( $suppressCache ) {
 183                                         $this->content = $this->getContent( $pageObj, $pageid );
 184                                         $p_result = $this->content->getParserOutput( $titleObj, null, $popts );
 185                                 } else {
 186                                         // Potentially cached
 187                                         $p_result = $this->getParsedContent( $pageObj, $popts, $pageid,
 188                                                 isset( $prop['wikitext'] ) );
 189                                 }
 190                         }
 191                 } else { // Not $oldid, $pageid, $page. Hence based on $text
 192                         $titleObj = Title::newFromText( $title );
 193                         if ( !$titleObj || $titleObj->isExternal() ) {
 194                                 $this->dieUsageMsg( array( 'invalidtitle', $title ) );
 195                         }
 196                         $wgTitle = $titleObj;
 197                         if ( $titleObj->canExist() ) {
 198                                 $pageObj = WikiPage::factory( $titleObj );
 199                         } else {
 200                                 // Do like MediaWiki::initializeArticle()
 201                                 $article = Article::newFromTitle( $titleObj, $this->getContext() );
 202                                 $pageObj = $article->getPage();
 203                         }
 204
 205                         $popts = $this->makeParserOptions( $pageObj, $params );
 206                         $textProvided = !is_null( $text );
 207
 208                         if ( !$textProvided ) {
 209                                 if ( $titleProvided && ( $prop || $params['generatexml'] ) ) {
 210                                         $this->setWarning(
 211                                                 "'title' used without 'text', and parsed page properties were requested " .
 212                                                 "(did you mean to use 'page' instead of 'title'?)"
 213                                         );
 214                                 }
 215                                 // Prevent warning from ContentHandler::makeContent()
 216                                 $text = '';
 217                         }
 218
 219                         // If we are parsing text, do not use the content model of the default
 220                         // API title, but default to wikitext to keep BC.
 221                         if ( $textProvided && !$titleProvided && is_null( $model ) ) {
 222                                 $model = CONTENT_MODEL_WIKITEXT;
 223                                 $this->setWarning( "No 'title' or 'contentmodel' was given, assuming $model." );
 224                         }
 225
 226                         try {
 227                                 $this->content = ContentHandler::makeContent( $text, $titleObj, $model, $format );
 228                         } catch ( MWContentSerializationException $ex ) {
 229                                 $this->dieUsage( $ex->getMessage(), 'parseerror' );
 230                         }
 231
 232                         if ( $this->section !== false ) {
 233                                 if ( $this->section === 'new' ) {
 234                                         // Insert the section title above the content.
 235                                         if ( !is_null( $params['sectiontitle'] ) && $params['sectiontitle'] !== '' ) {
 236                                                 $this->content = $this->content->addSectionHeader( $params['sectiontitle'] );
 237                                         }
 238                                 } else {
 239                                         $this->content = $this->getSectionContent( $this->content, $titleObj->getPrefixedText() );
 240                                 }
 241                         }
 242
 243                         if ( $params['pst'] || $params['onlypst'] ) {
 244                                 $this->pstContent = $this->content->preSaveTransform( $titleObj, $this->getUser(), $popts );
 245                         }
 246                         if ( $params['onlypst'] ) {
 247                                 // Build a result and bail out
 248                                 $result_array = array();
 249                                 $result_array['text'] = $this->pstContent->serialize( $format );
 250                                 $result_array[ApiResult::META_BC_SUBELEMENTS][] = 'text';
 251                                 if ( isset( $prop['wikitext'] ) ) {
 252                                         $result_array['wikitext'] = $this->content->serialize( $format );
 253                                         $result_array[ApiResult::META_BC_SUBELEMENTS][] = 'wikitext';
 254                                 }
 255                                 if ( !is_null( $params['summary'] ) ||
 256                                         ( !is_null( $params['sectiontitle'] ) && $this->section === 'new' )
 257                                 ) {
 258                                         $result_array['parsedsummary'] = $this->formatSummary( $titleObj, $params );
 259                                         $result_array[ApiResult::META_BC_SUBELEMENTS][] = 'parsedsummary';
 260                                 }
 261
 262                                 $result->addValue( null, $this->getModuleName(), $result_array );
 263
 264                                 return;
 265                         }
 266
 267                         // Not cached (save or load)
 268                         if ( $params['pst'] ) {
 269                                 $p_result = $this->pstContent->getParserOutput( $titleObj, null, $popts );
 270                         } else {
 271                                 $p_result = $this->content->getParserOutput( $titleObj, null, $popts );
 272                         }
 273                 }
 274
 275                 $result_array = array();
 276
 277                 $result_array['title'] = $titleObj->getPrefixedText();
 278                 $result_array['pageid'] = $pageid ? $pageid : $pageObj->getId();
 279
 280                 if ( !is_null( $oldid ) ) {
 281                         $result_array['revid'] = intval( $oldid );
 282                 }
 283
 284                 if ( $params['redirects'] && !is_null( $redirValues ) ) {
 285                         $result_array['redirects'] = $redirValues;
 286                 }
 287
 288                 if ( $params['disabletoc'] ) {
 289                         $p_result->setTOCEnabled( false );
 290                 }
 291
 292                 if ( isset( $prop['text'] ) ) {
 293                         $result_array['text'] = $p_result->getText();
 294                         $result_array[ApiResult::META_BC_SUBELEMENTS][] = 'text';
 295                 }
 296
 297                 if ( !is_null( $params['summary'] ) ||
 298                         ( !is_null( $params['sectiontitle'] ) && $this->section === 'new' )
 299                 ) {
 300                         $result_array['parsedsummary'] = $this->formatSummary( $titleObj, $params );
 301                         $result_array[ApiResult::META_BC_SUBELEMENTS][] = 'parsedsummary';
 302                 }
 303
 304                 if ( isset( $prop['langlinks'] ) ) {
 305                         $langlinks = $p_result->getLanguageLinks();
 306
 307                         if ( $params['effectivelanglinks'] ) {
 308                                 // Link flags are ignored for now, but may in the future be
 309                                 // included in the result.
 310                                 $linkFlags = array();
 311                                 Hooks::run( 'LanguageLinks', array( $titleObj, &$langlinks, &$linkFlags ) );
 312                         }
 313                 } else {
 314                         $langlinks = false;
 315                 }
 316
 317                 if ( isset( $prop['langlinks'] ) ) {
 318                         $result_array['langlinks'] = $this->formatLangLinks( $langlinks );
 319                 }
 320                 if ( isset( $prop['categories'] ) ) {
 321                         $result_array['categories'] = $this->formatCategoryLinks( $p_result->getCategories() );
 322                 }
 323                 if ( isset( $prop['categorieshtml'] ) ) {
 324                         $result_array['categorieshtml'] = $this->categoriesHtml( $p_result->getCategories() );
 325                         $result_array[ApiResult::META_BC_SUBELEMENTS][] = 'categorieshtml';
 326                 }
 327                 if ( isset( $prop['links'] ) ) {
 328                         $result_array['links'] = $this->formatLinks( $p_result->getLinks() );
 329                 }
 330                 if ( isset( $prop['templates'] ) ) {
 331                         $result_array['templates'] = $this->formatLinks( $p_result->getTemplates() );
 332                 }
 333                 if ( isset( $prop['images'] ) ) {
 334                         $result_array['images'] = array_keys( $p_result->getImages() );
 335                 }
 336                 if ( isset( $prop['externallinks'] ) ) {
 337                         $result_array['externallinks'] = array_keys( $p_result->getExternalLinks() );
 338                 }
 339                 if ( isset( $prop['sections'] ) ) {
 340                         $result_array['sections'] = $p_result->getSections();
 341                 }
 342
 343                 if ( isset( $prop['displaytitle'] ) ) {
 344                         $result_array['displaytitle'] = $p_result->getDisplayTitle() ?
 345                                 $p_result->getDisplayTitle() :
 346                                 $titleObj->getPrefixedText();
 347                 }
 348
 349                 if ( isset( $prop['headitems'] ) || isset( $prop['headhtml'] ) ) {
 350                         $context = $this->getContext();
 351                         $context->setTitle( $titleObj );
 352                         $context->getOutput()->addParserOutputMetadata( $p_result );
 353
 354                         if ( isset( $prop['headitems'] ) ) {
 355                                 $headItems = $this->formatHeadItems( $p_result->getHeadItems() );
 356
 357                                 $css = $this->formatCss( $context->getOutput()->buildCssLinksArray() );
 358
 359                                 $scripts = array( $context->getOutput()->getHeadScripts() );
 360
 361                                 $result_array['headitems'] = array_merge( $headItems, $css, $scripts );
 362                         }
 363
 364                         if ( isset( $prop['headhtml'] ) ) {
 365                                 $result_array['headhtml'] = $context->getOutput()->headElement( $context->getSkin() );
 366                                 $result_array[ApiResult::META_BC_SUBELEMENTS][] = 'headhtml';
 367                         }
 368                 }
 369
 370                 if ( isset( $prop['modules'] ) ) {
 371                         $result_array['modules'] = array_values( array_unique( $p_result->getModules() ) );
 372                         $result_array['modulescripts'] = array_values( array_unique( $p_result->getModuleScripts() ) );
 373                         $result_array['modulestyles'] = array_values( array_unique( $p_result->getModuleStyles() ) );
 374                         // To be removed in 1.27
 375                         $result_array['modulemessages'] = array();
 376                         $this->setWarning( 'modulemessages is deprecated since MediaWiki 1.26' );
 377                 }
 378
 379                 if ( isset( $prop['jsconfigvars'] ) ) {
 380                         $result_array['jsconfigvars'] =
 381                                 ApiResult::addMetadataToResultVars( $p_result->getJsConfigVars() );
 382                 }
 383
 384                 if ( isset( $prop['encodedjsconfigvars'] ) ) {
 385                         $result_array['encodedjsconfigvars'] = FormatJson::encode(
 386                                 $p_result->getJsConfigVars(), false, FormatJson::ALL_OK
 387                         );
 388                         $result_array[ApiResult::META_SUBELEMENTS][] = 'encodedjsconfigvars';
 389                 }
 390
 391                 if ( isset( $prop['modules'] ) &&
 392                         !isset( $prop['jsconfigvars'] ) && !isset( $prop['encodedjsconfigvars'] ) ) {
 393                         $this->setWarning( "Property 'modules' was set but not 'jsconfigvars' " .
 394                                 "or 'encodedjsconfigvars'. Configuration variables are necessary " .
 395                                 "for proper module usage." );
 396                 }
 397
 398                 if ( isset( $prop['indicators'] ) ) {
 399                         $result_array['indicators'] = (array)$p_result->getIndicators();
 400                         ApiResult::setArrayType( $result_array['indicators'], 'BCkvp', 'name' );
 401                 }
 402
 403                 if ( isset( $prop['iwlinks'] ) ) {
 404                         $result_array['iwlinks'] = $this->formatIWLinks( $p_result->getInterwikiLinks() );
 405                 }
 406
 407                 if ( isset( $prop['wikitext'] ) ) {
 408                         $result_array['wikitext'] = $this->content->serialize( $format );
 409                         $result_array[ApiResult::META_BC_SUBELEMENTS][] = 'wikitext';
 410                         if ( !is_null( $this->pstContent ) ) {
 411                                 $result_array['psttext'] = $this->pstContent->serialize( $format );
 412                                 $result_array[ApiResult::META_BC_SUBELEMENTS][] = 'psttext';
 413                         }
 414                 }
 415                 if ( isset( $prop['properties'] ) ) {
 416                         $result_array['properties'] = (array)$p_result->getProperties();
 417                         ApiResult::setArrayType( $result_array['properties'], 'BCkvp', 'name' );
 418                 }
 419
 420                 if ( isset( $prop['limitreportdata'] ) ) {
 421                         $result_array['limitreportdata'] =
 422                                 $this->formatLimitReportData( $p_result->getLimitReportData() );
 423                 }
 424                 if ( isset( $prop['limitreporthtml'] ) ) {
 425                         $result_array['limitreporthtml'] = EditPage::getPreviewLimitReport( $p_result );
 426                         $result_array[ApiResult::META_BC_SUBELEMENTS][] = 'limitreporthtml';
 427                 }
 428
 429                 if ( isset( $prop['parsetree'] ) || $params['generatexml'] ) {
 430                         if ( $this->content->getModel() != CONTENT_MODEL_WIKITEXT ) {
 431                                 $this->dieUsage( "parsetree is only supported for wikitext content", "notwikitext" );
 432                         }
 433
 434                         $wgParser->startExternalParse( $titleObj, $popts, Parser::OT_PREPROCESS );
 435                         $dom = $wgParser->preprocessToDom( $this->content->getNativeData() );
 436                         if ( is_callable( array( $dom, 'saveXML' ) ) ) {
 437                                 $xml = $dom->saveXML();
 438                         } else {
 439                                 $xml = $dom->__toString();
 440                         }
 441                         $result_array['parsetree'] = $xml;
 442                         $result_array[ApiResult::META_BC_SUBELEMENTS][] = 'parsetree';
 443                 }
 444
 445                 $result_mapping = array(
 446                         'redirects' => 'r',
 447                         'langlinks' => 'll',
 448                         'categories' => 'cl',
 449                         'links' => 'pl',
 450                         'templates' => 'tl',
 451                         'images' => 'img',
 452                         'externallinks' => 'el',
 453                         'iwlinks' => 'iw',
 454                         'sections' => 's',
 455                         'headitems' => 'hi',
 456                         'modules' => 'm',
 457                         'indicators' => 'ind',
 458                         'modulescripts' => 'm',
 459                         'modulestyles' => 'm',
 460                         'modulemessages' => 'm',
 461                         'properties' => 'pp',
 462                         'limitreportdata' => 'lr',
 463                 );
 464                 $this->setIndexedTagNames( $result_array, $result_mapping );
 465                 $result->addValue( null, $this->getModuleName(), $result_array );
 466         }
 467
 468         /**
 469          * Constructs a ParserOptions object
 470          *
 471          * @param WikiPage $pageObj
 472          * @param array $params
 473          *
 474          * @return ParserOptions
 475          */
 476         protected function makeParserOptions( WikiPage $pageObj, array $params ) {
 477
 478                 $popts = $pageObj->makeParserOptions( $this->getContext() );
 479                 $popts->enableLimitReport( !$params['disablepp'] && !$params['disablelimitreport'] );
 480                 $popts->setIsPreview( $params['preview'] || $params['sectionpreview'] );
 481                 $popts->setIsSectionPreview( $params['sectionpreview'] );
 482                 $popts->setEditSection( !$params['disableeditsection'] );
 483                 if ( $params['disabletidy'] ) {
 484                         $popts->setTidy( false );
 485                 }
 486
 487                 return $popts;
 488         }
 489
 490         /**
 491          * @param WikiPage $page
 492          * @param ParserOptions $popts
 493          * @param int $pageId
 494          * @param bool $getWikitext
 495          * @return ParserOutput
 496          */
 497         private function getParsedContent( WikiPage $page, $popts, $pageId = null, $getWikitext = false ) {
 498                 $this->content = $this->getContent( $page, $pageId );
 499
 500                 if ( $this->section !== false && $this->content !== null ) {
 501                         // Not cached (save or load)
 502                         return $this->content->getParserOutput( $page->getTitle(), null, $popts );
 503                 }
 504
 505                 // Try the parser cache first
 506                 // getParserOutput will save to Parser cache if able
 507                 $pout = $page->getParserOutput( $popts );
 508                 if ( !$pout ) {
 509                         $this->dieUsage( "There is no revision ID {$page->getLatest()}", 'missingrev' );
 510                 }
 511                 if ( $getWikitext ) {
 512                         $this->content = $page->getContent( Revision::RAW );
 513                 }
 514
 515                 return $pout;
 516         }
 517
 518         /**
 519          * Get the content for the given page and the requested section.
 520          *
 521          * @param WikiPage $page
 522          * @param int $pageId
 523          * @return Content
 524          */
 525         private function getContent( WikiPage $page, $pageId = null ) {
 526                 $content = $page->getContent( Revision::RAW ); // XXX: really raw?
 527
 528                 if ( $this->section !== false && $content !== null ) {
 529                         $content = $this->getSectionContent(
 530                                 $content,
 531                                 !is_null( $pageId ) ? 'page id ' . $pageId : $page->getTitle()->getPrefixedText()
 532                         );
 533                 }
 534                 return $content;
 535         }
 536
 537         /**
 538          * Extract the requested section from the given Content
 539          *
 540          * @param Content $content
 541          * @param string $what Identifies the content in error messages, e.g. page title.
 542          * @return Content|bool
 543          */
 544         private function getSectionContent( Content $content, $what ) {
 545                 // Not cached (save or load)
 546                 $section = $content->getSection( $this->section );
 547                 if ( $section === false ) {
 548                         $this->dieUsage( "There is no section {$this->section} in " . $what, 'nosuchsection' );
 549                 }
 550                 if ( $section === null ) {
 551                         $this->dieUsage( "Sections are not supported by " . $what, 'nosuchsection' );
 552                         $section = false;
 553                 }
 554
 555                 return $section;
 556         }
 557
 558         /**
 559          * This mimicks the behavior of EditPage in formatting a summary
 560          *
 561          * @param Title $title of the page being parsed
 562          * @param Array $params the API parameters of the request
 563          * @return Content|bool
 564          */
 565         private function formatSummary( $title, $params ) {
 566                 global $wgParser;
 567                 $summary = !is_null( $params['summary'] ) ? $params['summary'] : '';
 568                 $sectionTitle = !is_null( $params['sectiontitle'] ) ? $params['sectiontitle'] : '';
 569
 570                 if ( $this->section === 'new' && ( $sectionTitle === '' || $summary === '' ) ) {
 571                         if ( $sectionTitle !== '' ) {
 572                                 $summary = $params['sectiontitle'];
 573                         }
 574                         if ( $summary !== '' ) {
 575                                 $summary = wfMessage( 'newsectionsummary' )
 576                                         ->rawParams( $wgParser->stripSectionName( $summary ) )
 577                                                 ->inContentLanguage()->text();
 578                         }
 579                 }
 580                 return Linker::formatComment( $summary, $title, $this->section === 'new' );
 581         }
 582
 583         private function formatLangLinks( $links ) {
 584                 $result = array();
 585                 foreach ( $links as $link ) {
 586                         $entry = array();
 587                         $bits = explode( ':', $link, 2 );
 588                         $title = Title::newFromText( $link );
 589
 590                         $entry['lang'] = $bits[0];
 591                         if ( $title ) {
 592                                 $entry['url'] = wfExpandUrl( $title->getFullURL(), PROTO_CURRENT );
 593                                 // localised language name in 'uselang' language
 594                                 $entry['langname'] = Language::fetchLanguageName(
 595                                         $title->getInterwiki(),
 596                                         $this->getLanguage()->getCode()
 597                                 );
 598
 599                                 // native language name
 600                                 $entry['autonym'] = Language::fetchLanguageName( $title->getInterwiki() );
 601                         }
 602                         ApiResult::setContentValue( $entry, 'title', $bits[1] );
 603                         $result[] = $entry;
 604                 }
 605
 606                 return $result;
 607         }
 608
 609         private function formatCategoryLinks( $links ) {
 610                 $result = array();
 611
 612                 if ( !$links ) {
 613                         return $result;
 614                 }
 615
 616                 // Fetch hiddencat property
 617                 $lb = new LinkBatch;
 618                 $lb->setArray( array( NS_CATEGORY => $links ) );
 619                 $db = $this->getDB();
 620                 $res = $db->select( array( 'page', 'page_props' ),
 621                         array( 'page_title', 'pp_propname' ),
 622                         $lb->constructSet( 'page', $db ),
 623                         __METHOD__,
 624                         array(),
 625                         array( 'page_props' => array(
 626                                 'LEFT JOIN', array( 'pp_propname' => 'hiddencat', 'pp_page = page_id' )
 627                         ) )
 628                 );
 629                 $hiddencats = array();
 630                 foreach ( $res as $row ) {
 631                         $hiddencats[$row->page_title] = isset( $row->pp_propname );
 632                 }
 633
 634                 foreach ( $links as $link => $sortkey ) {
 635                         $entry = array();
 636                         $entry['sortkey'] = $sortkey;
 637                         // array keys will cast numeric category names to ints, so cast back to string
 638                         ApiResult::setContentValue( $entry, 'category', (string)$link );
 639                         if ( !isset( $hiddencats[$link] ) ) {
 640                                 $entry['missing'] = true;
 641                         } elseif ( $hiddencats[$link] ) {
 642                                 $entry['hidden'] = true;
 643                         }
 644                         $result[] = $entry;
 645                 }
 646
 647                 return $result;
 648         }
 649
 650         private function categoriesHtml( $categories ) {
 651                 $context = $this->getContext();
 652                 $context->getOutput()->addCategoryLinks( $categories );
 653
 654                 return $context->getSkin()->getCategories();
 655         }
 656
 657         private function formatLinks( $links ) {
 658                 $result = array();
 659                 foreach ( $links as $ns => $nslinks ) {
 660                         foreach ( $nslinks as $title => $id ) {
 661                                 $entry = array();
 662                                 $entry['ns'] = $ns;
 663                                 ApiResult::setContentValue( $entry, 'title', Title::makeTitle( $ns, $title )->getFullText() );
 664                                 $entry['exists'] = $id != 0;
 665                                 $result[] = $entry;
 666                         }
 667                 }
 668
 669                 return $result;
 670         }
 671
 672         private function formatIWLinks( $iw ) {
 673                 $result = array();
 674                 foreach ( $iw as $prefix => $titles ) {
 675                         foreach ( array_keys( $titles ) as $title ) {
 676                                 $entry = array();
 677                                 $entry['prefix'] = $prefix;
 678
 679                                 $title = Title::newFromText( "{$prefix}:{$title}" );
 680                                 if ( $title ) {
 681                                         $entry['url'] = wfExpandUrl( $title->getFullURL(), PROTO_CURRENT );
 682                                 }
 683
 684                                 ApiResult::setContentValue( $entry, 'title', $title->getFullText() );
 685                                 $result[] = $entry;
 686                         }
 687                 }
 688
 689                 return $result;
 690         }
 691
 692         private function formatHeadItems( $headItems ) {
 693                 $result = array();
 694                 foreach ( $headItems as $tag => $content ) {
 695                         $entry = array();
 696                         $entry['tag'] = $tag;
 697                         ApiResult::setContentValue( $entry, 'content', $content );
 698                         $result[] = $entry;
 699                 }
 700
 701                 return $result;
 702         }
 703
 704         private function formatCss( $css ) {
 705                 $result = array();
 706                 foreach ( $css as $file => $link ) {
 707                         $entry = array();
 708                         $entry['file'] = $file;
 709                         ApiResult::setContentValue( $entry, 'link', $link );
 710                         $result[] = $entry;
 711                 }
 712
 713                 return $result;
 714         }
 715
 716         private function formatLimitReportData( $limitReportData ) {
 717                 $result = array();
 718
 719                 foreach ( $limitReportData as $name => $value ) {
 720                         $entry = array();
 721                         $entry['name'] = $name;
 722                         if ( !is_array( $value ) ) {
 723                                 $value = array( $value );
 724                         }
 725                         ApiResult::setIndexedTagNameRecursive( $value, 'param' );
 726                         $entry = array_merge( $entry, $value );
 727                         $result[] = $entry;
 728                 }
 729
 730                 return $result;
 731         }
 732
 733         private function setIndexedTagNames( &$array, $mapping ) {
 734                 foreach ( $mapping as $key => $name ) {
 735                         if ( isset( $array[$key] ) ) {
 736                                 ApiResult::setIndexedTagName( $array[$key], $name );
 737                         }
 738                 }
 739         }
 740
 741         public function getAllowedParams() {
 742                 return array(
 743                         'title' => null,
 744                         'text' => array(
 745                                 ApiBase::PARAM_TYPE => 'text',
 746                         ),
 747                         'summary' => null,
 748                         'page' => null,
 749                         'pageid' => array(
 750                                 ApiBase::PARAM_TYPE => 'integer',
 751                         ),
 752                         'redirects' => false,
 753                         'oldid' => array(
 754                                 ApiBase::PARAM_TYPE => 'integer',
 755                         ),
 756                         'prop' => array(
 757                                 ApiBase::PARAM_DFLT => 'text|langlinks|categories|links|templates|' .
 758                                         'images|externallinks|sections|revid|displaytitle|iwlinks|properties',
 759                                 ApiBase::PARAM_ISMULTI => true,
 760                                 ApiBase::PARAM_TYPE => array(
 761                                         'text',
 762                                         'langlinks',
 763                                         'categories',
 764                                         'categorieshtml',
 765                                         'links',
 766                                         'templates',
 767                                         'images',
 768                                         'externallinks',
 769                                         'sections',
 770                                         'revid',
 771                                         'displaytitle',
 772                                         'headitems',
 773                                         'headhtml',
 774                                         'modules',
 775                                         'jsconfigvars',
 776                                         'encodedjsconfigvars',
 777                                         'indicators',
 778                                         'iwlinks',
 779                                         'wikitext',
 780                                         'properties',
 781                                         'limitreportdata',
 782                                         'limitreporthtml',
 783                                         'parsetree',
 784                                 ),
 785                                 ApiBase::PARAM_HELP_MSG_PER_VALUE => array(
 786                                         'parsetree' => array( 'apihelp-parse-paramvalue-prop-parsetree', CONTENT_MODEL_WIKITEXT ),
 787                                 ),
 788                         ),
 789                         'pst' => false,
 790                         'onlypst' => false,
 791                         'effectivelanglinks' => false,
 792                         'section' => null,
 793                         'sectiontitle' => array(
 794                                 ApiBase::PARAM_TYPE => 'string',
 795                         ),
 796                         'disablepp' => array(
 797                                 ApiBase::PARAM_DFLT => false,
 798                                 ApiBase::PARAM_DEPRECATED => true,
 799                         ),
 800                         'disablelimitreport' => false,
 801                         'disableeditsection' => false,
 802                         'disabletidy' => false,
 803                         'generatexml' => array(
 804                                 ApiBase::PARAM_DFLT => false,
 805                                 ApiBase::PARAM_HELP_MSG => array(
 806                                         'apihelp-parse-param-generatexml', CONTENT_MODEL_WIKITEXT
 807                                 ),
 808                                 ApiBase::PARAM_DEPRECATED => true,
 809                         ),
 810                         'preview' => false,
 811                         'sectionpreview' => false,
 812                         'disabletoc' => false,
 813                         'contentformat' => array(
 814                                 ApiBase::PARAM_TYPE => ContentHandler::getAllContentFormats(),
 815                         ),
 816                         'contentmodel' => array(
 817                                 ApiBase::PARAM_TYPE => ContentHandler::getContentModels(),
 818                         )
 819                 );
 820         }
 821
 822         protected function getExamplesMessages() {
 823                 return array(
 824                         'action=parse&page=Project:Sandbox'
 825                                 => 'apihelp-parse-example-page',
 826                         'action=parse&text={{Project:Sandbox}}&contentmodel=wikitext'
 827                                 => 'apihelp-parse-example-text',
 828                         'action=parse&text={{PAGENAME}}&title=Test'
 829                                 => 'apihelp-parse-example-texttitle',
 830                         'action=parse&summary=Some+[[link]]&prop='
 831                                 => 'apihelp-parse-example-summary',
 832                 );
 833         }
 834
 835         public function getHelpUrls() {
 836                 return 'https://www.mediawiki.org/wiki/API:Parsing_wikitext#parse';
 837         }
 838 }