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         private function checkReadPermissions( Title $title ) {
  40                 if ( !$title->userCan( 'read', $this->getUser() ) ) {
  41                         $this->dieUsage( "You don't have permission to view this page", 'permissiondenied' );
  42                 }
  43         }
  44
  45         public function execute() {
  46                 // The data is hot but user-dependent, like page views, so we set vary cookies
  47                 $this->getMain()->setCacheMode( 'anon-public-user-private' );
  48
  49                 // Get parameters
  50                 $params = $this->extractRequestParams();
  51                 $text = $params['text'];
  52                 $title = $params['title'];
  53                 if ( $title === null ) {
  54                         $titleProvided = false;
  55                         // A title is needed for parsing, so arbitrarily choose one
  56                         $title = 'API';
  57                 } else {
  58                         $titleProvided = true;
  59                 }
  60
  61                 $page = $params['page'];
  62                 $pageid = $params['pageid'];
  63                 $oldid = $params['oldid'];
  64
  65                 $model = $params['contentmodel'];
  66                 $format = $params['contentformat'];
  67
  68                 if ( !is_null( $page ) && ( !is_null( $text ) || $titleProvided ) ) {
  69                         $this->dieUsage(
  70                                 'The page parameter cannot be used together with the text and title parameters',
  71                                 'params'
  72                         );
  73                 }
  74
  75                 $prop = array_flip( $params['prop'] );
  76
  77                 if ( isset( $params['section'] ) ) {
  78                         $this->section = $params['section'];
  79                         if ( !preg_match( '/^((T-)?\d+|new)$/', $this->section ) ) {
  80                                 $this->dieUsage(
  81                                         'The section parameter must be a valid section id or "new"', 'invalidsection'
  82                                 );
  83                         }
  84                 } else {
  85                         $this->section = false;
  86                 }
  87
  88                 // The parser needs $wgTitle to be set, apparently the
  89                 // $title parameter in Parser::parse isn't enough *sigh*
  90                 // TODO: Does this still need $wgTitle?
  91                 global $wgParser, $wgTitle;
  92
  93                 $redirValues = null;
  94
  95                 // Return result
  96                 $result = $this->getResult();
  97
  98                 if ( !is_null( $oldid ) || !is_null( $pageid ) || !is_null( $page ) ) {
  99                         if ( $this->section === 'new' ) {
 100                                         $this->dieUsage(
 101                                                 'section=new cannot be combined with oldid, pageid or page parameters. ' .
 102                                                 'Please use text', 'params'
 103                                         );
 104                         }
 105                         if ( !is_null( $oldid ) ) {
 106                                 // Don't use the parser cache
 107                                 $rev = Revision::newFromId( $oldid );
 108                                 if ( !$rev ) {
 109                                         $this->dieUsage( "There is no revision ID $oldid", 'missingrev' );
 110                                 }
 111
 112                                 $this->checkReadPermissions( $rev->getTitle() );
 113                                 if ( !$rev->userCan( Revision::DELETED_TEXT, $this->getUser() ) ) {
 114                                         $this->dieUsage( "You don't have permission to view deleted revisions", 'permissiondenied' );
 115                                 }
 116
 117                                 $titleObj = $rev->getTitle();
 118                                 $wgTitle = $titleObj;
 119                                 $pageObj = WikiPage::factory( $titleObj );
 120                                 list( $popts, $reset, $suppressCache ) = $this->makeParserOptions( $pageObj, $params );
 121
 122                                 // If for some reason the "oldid" is actually the current revision, it may be cached
 123                                 // Deliberately comparing $pageObj->getLatest() with $rev->getId(), rather than
 124                                 // checking $rev->isCurrent(), because $pageObj is what actually ends up being used,
 125                                 // and if its ->getLatest() is outdated, $rev->isCurrent() won't tell us that.
 126                                 if ( !$suppressCache && $rev->getId() == $pageObj->getLatest() ) {
 127                                         // May get from/save to parser cache
 128                                         $p_result = $this->getParsedContent( $pageObj, $popts,
 129                                                 $pageid, isset( $prop['wikitext'] ) );
 130                                 } else { // This is an old revision, so get the text differently
 131                                         $this->content = $rev->getContent( Revision::FOR_THIS_USER, $this->getUser() );
 132
 133                                         if ( $this->section !== false ) {
 134                                                 $this->content = $this->getSectionContent( $this->content, 'r' . $rev->getId() );
 135                                         }
 136
 137                                         // Should we save old revision parses to the parser cache?
 138                                         $p_result = $this->content->getParserOutput( $titleObj, $rev->getId(), $popts );
 139                                 }
 140                         } else { // Not $oldid, but $pageid or $page
 141                                 if ( $params['redirects'] ) {
 142                                         $reqParams = [
 143                                                 'redirects' => '',
 144                                         ];
 145                                         if ( !is_null( $pageid ) ) {
 146                                                 $reqParams['pageids'] = $pageid;
 147                                         } else { // $page
 148                                                 $reqParams['titles'] = $page;
 149                                         }
 150                                         $req = new FauxRequest( $reqParams );
 151                                         $main = new ApiMain( $req );
 152                                         $pageSet = new ApiPageSet( $main );
 153                                         $pageSet->execute();
 154                                         $redirValues = $pageSet->getRedirectTitlesAsResult( $this->getResult() );
 155
 156                                         $to = $page;
 157                                         foreach ( $pageSet->getRedirectTitles() as $title ) {
 158                                                 $to = $title->getFullText();
 159                                         }
 160                                         $pageParams = [ 'title' => $to ];
 161                                 } elseif ( !is_null( $pageid ) ) {
 162                                         $pageParams = [ 'pageid' => $pageid ];
 163                                 } else { // $page
 164                                         $pageParams = [ 'title' => $page ];
 165                                 }
 166
 167                                 $pageObj = $this->getTitleOrPageId( $pageParams, 'fromdb' );
 168                                 $titleObj = $pageObj->getTitle();
 169                                 if ( !$titleObj || !$titleObj->exists() ) {
 170                                         $this->dieUsage( "The page you specified doesn't exist", 'missingtitle' );
 171                                 }
 172
 173                                 $this->checkReadPermissions( $titleObj );
 174                                 $wgTitle = $titleObj;
 175
 176                                 if ( isset( $prop['revid'] ) ) {
 177                                         $oldid = $pageObj->getLatest();
 178                                 }
 179
 180                                 list( $popts, $reset, $suppressCache ) = $this->makeParserOptions( $pageObj, $params );
 181
 182                                 // Don't pollute the parser cache when setting options that aren't
 183                                 // in ParserOptions::optionsHash()
 184                                 /// @todo: This should be handled closer to the actual cache instead of here, see T110269
 185                                 $suppressCache = $suppressCache ||
 186                                         $params['disablepp'] ||
 187                                         $params['disablelimitreport'] ||
 188                                         $params['preview'] ||
 189                                         $params['sectionpreview'] ||
 190                                         $params['disabletidy'];
 191
 192                                 if ( $suppressCache ) {
 193                                         $this->content = $this->getContent( $pageObj, $pageid );
 194                                         $p_result = $this->content->getParserOutput( $titleObj, null, $popts );
 195                                 } else {
 196                                         // Potentially cached
 197                                         $p_result = $this->getParsedContent( $pageObj, $popts, $pageid,
 198                                                 isset( $prop['wikitext'] ) );
 199                                 }
 200                         }
 201                 } else { // Not $oldid, $pageid, $page. Hence based on $text
 202                         $titleObj = Title::newFromText( $title );
 203                         if ( !$titleObj || $titleObj->isExternal() ) {
 204                                 $this->dieUsageMsg( [ 'invalidtitle', $title ] );
 205                         }
 206                         $wgTitle = $titleObj;
 207                         if ( $titleObj->canExist() ) {
 208                                 $pageObj = WikiPage::factory( $titleObj );
 209                         } else {
 210                                 // Do like MediaWiki::initializeArticle()
 211                                 $article = Article::newFromTitle( $titleObj, $this->getContext() );
 212                                 $pageObj = $article->getPage();
 213                         }
 214
 215                         list( $popts, $reset ) = $this->makeParserOptions( $pageObj, $params );
 216                         $textProvided = !is_null( $text );
 217
 218                         if ( !$textProvided ) {
 219                                 if ( $titleProvided && ( $prop || $params['generatexml'] ) ) {
 220                                         $this->setWarning(
 221                                                 "'title' used without 'text', and parsed page properties were requested " .
 222                                                 "(did you mean to use 'page' instead of 'title'?)"
 223                                         );
 224                                 }
 225                                 // Prevent warning from ContentHandler::makeContent()
 226                                 $text = '';
 227                         }
 228
 229                         // If we are parsing text, do not use the content model of the default
 230                         // API title, but default to wikitext to keep BC.
 231                         if ( $textProvided && !$titleProvided && is_null( $model ) ) {
 232                                 $model = CONTENT_MODEL_WIKITEXT;
 233                                 $this->setWarning( "No 'title' or 'contentmodel' was given, assuming $model." );
 234                         }
 235
 236                         try {
 237                                 $this->content = ContentHandler::makeContent( $text, $titleObj, $model, $format );
 238                         } catch ( MWContentSerializationException $ex ) {
 239                                 $this->dieUsage( $ex->getMessage(), 'parseerror' );
 240                         }
 241
 242                         if ( $this->section !== false ) {
 243                                 if ( $this->section === 'new' ) {
 244                                         // Insert the section title above the content.
 245                                         if ( !is_null( $params['sectiontitle'] ) && $params['sectiontitle'] !== '' ) {
 246                                                 $this->content = $this->content->addSectionHeader( $params['sectiontitle'] );
 247                                         }
 248                                 } else {
 249                                         $this->content = $this->getSectionContent( $this->content, $titleObj->getPrefixedText() );
 250                                 }
 251                         }
 252
 253                         if ( $params['pst'] || $params['onlypst'] ) {
 254                                 $this->pstContent = $this->content->preSaveTransform( $titleObj, $this->getUser(), $popts );
 255                         }
 256                         if ( $params['onlypst'] ) {
 257                                 // Build a result and bail out
 258                                 $result_array = [];
 259                                 $result_array['text'] = $this->pstContent->serialize( $format );
 260                                 $result_array[ApiResult::META_BC_SUBELEMENTS][] = 'text';
 261                                 if ( isset( $prop['wikitext'] ) ) {
 262                                         $result_array['wikitext'] = $this->content->serialize( $format );
 263                                         $result_array[ApiResult::META_BC_SUBELEMENTS][] = 'wikitext';
 264                                 }
 265                                 if ( !is_null( $params['summary'] ) ||
 266                                         ( !is_null( $params['sectiontitle'] ) && $this->section === 'new' )
 267                                 ) {
 268                                         $result_array['parsedsummary'] = $this->formatSummary( $titleObj, $params );
 269                                         $result_array[ApiResult::META_BC_SUBELEMENTS][] = 'parsedsummary';
 270                                 }
 271
 272                                 $result->addValue( null, $this->getModuleName(), $result_array );
 273
 274                                 return;
 275                         }
 276
 277                         // Not cached (save or load)
 278                         if ( $params['pst'] ) {
 279                                 $p_result = $this->pstContent->getParserOutput( $titleObj, null, $popts );
 280                         } else {
 281                                 $p_result = $this->content->getParserOutput( $titleObj, null, $popts );
 282                         }
 283                 }
 284
 285                 $result_array = [];
 286
 287                 $result_array['title'] = $titleObj->getPrefixedText();
 288                 $result_array['pageid'] = $pageid ?: $pageObj->getId();
 289
 290                 if ( !is_null( $oldid ) ) {
 291                         $result_array['revid'] = intval( $oldid );
 292                 }
 293
 294                 if ( $params['redirects'] && !is_null( $redirValues ) ) {
 295                         $result_array['redirects'] = $redirValues;
 296                 }
 297
 298                 if ( $params['disabletoc'] ) {
 299                         $p_result->setTOCEnabled( false );
 300                 }
 301
 302                 if ( isset( $prop['text'] ) ) {
 303                         $result_array['text'] = $p_result->getText();
 304                         $result_array[ApiResult::META_BC_SUBELEMENTS][] = 'text';
 305                 }
 306
 307                 if ( !is_null( $params['summary'] ) ||
 308                         ( !is_null( $params['sectiontitle'] ) && $this->section === 'new' )
 309                 ) {
 310                         $result_array['parsedsummary'] = $this->formatSummary( $titleObj, $params );
 311                         $result_array[ApiResult::META_BC_SUBELEMENTS][] = 'parsedsummary';
 312                 }
 313
 314                 if ( isset( $prop['langlinks'] ) ) {
 315                         $langlinks = $p_result->getLanguageLinks();
 316
 317                         if ( $params['effectivelanglinks'] ) {
 318                                 // Link flags are ignored for now, but may in the future be
 319                                 // included in the result.
 320                                 $linkFlags = [];
 321                                 Hooks::run( 'LanguageLinks', [ $titleObj, &$langlinks, &$linkFlags ] );
 322                         }
 323                 } else {
 324                         $langlinks = false;
 325                 }
 326
 327                 if ( isset( $prop['langlinks'] ) ) {
 328                         $result_array['langlinks'] = $this->formatLangLinks( $langlinks );
 329                 }
 330                 if ( isset( $prop['categories'] ) ) {
 331                         $result_array['categories'] = $this->formatCategoryLinks( $p_result->getCategories() );
 332                 }
 333                 if ( isset( $prop['categorieshtml'] ) ) {
 334                         $result_array['categorieshtml'] = $this->categoriesHtml( $p_result->getCategories() );
 335                         $result_array[ApiResult::META_BC_SUBELEMENTS][] = 'categorieshtml';
 336                 }
 337                 if ( isset( $prop['links'] ) ) {
 338                         $result_array['links'] = $this->formatLinks( $p_result->getLinks() );
 339                 }
 340                 if ( isset( $prop['templates'] ) ) {
 341                         $result_array['templates'] = $this->formatLinks( $p_result->getTemplates() );
 342                 }
 343                 if ( isset( $prop['images'] ) ) {
 344                         $result_array['images'] = array_keys( $p_result->getImages() );
 345                 }
 346                 if ( isset( $prop['externallinks'] ) ) {
 347                         $result_array['externallinks'] = array_keys( $p_result->getExternalLinks() );
 348                 }
 349                 if ( isset( $prop['sections'] ) ) {
 350                         $result_array['sections'] = $p_result->getSections();
 351                 }
 352
 353                 if ( isset( $prop['displaytitle'] ) ) {
 354                         $result_array['displaytitle'] = $p_result->getDisplayTitle() ?:
 355                                 $titleObj->getPrefixedText();
 356                 }
 357
 358                 if ( isset( $prop['headitems'] ) ) {
 359                         $result_array['headitems'] = $this->formatHeadItems( $p_result->getHeadItems() );
 360                         $this->logFeatureUsage( 'action=parse&prop=headitems' );
 361                         $this->setWarning( 'headitems is deprecated since MediaWiki 1.28. '
 362                                 . 'Use prop=headhtml when creating new HTML documents, or '
 363                                 . 'prop=modules|jsconfigvars when updating a document client-side.' );
 364                 }
 365
 366                 if ( isset( $prop['headhtml'] ) ) {
 367                         $context = new DerivativeContext( $this->getContext() );
 368                         $context->setTitle( $titleObj );
 369                         $context->setWikiPage( $pageObj );
 370
 371                         // We need an OutputPage tied to $context, not to the
 372                         // RequestContext at the root of the stack.
 373                         $output = new OutputPage( $context );
 374                         $output->addParserOutputMetadata( $p_result );
 375
 376                         $result_array['headhtml'] = $output->headElement( $context->getSkin() );
 377                         $result_array[ApiResult::META_BC_SUBELEMENTS][] = 'headhtml';
 378                 }
 379
 380                 if ( isset( $prop['modules'] ) ) {
 381                         $result_array['modules'] = array_values( array_unique( $p_result->getModules() ) );
 382                         $result_array['modulescripts'] = array_values( array_unique( $p_result->getModuleScripts() ) );
 383                         $result_array['modulestyles'] = array_values( array_unique( $p_result->getModuleStyles() ) );
 384                 }
 385
 386                 if ( isset( $prop['jsconfigvars'] ) ) {
 387                         $result_array['jsconfigvars'] =
 388                                 ApiResult::addMetadataToResultVars( $p_result->getJsConfigVars() );
 389                 }
 390
 391                 if ( isset( $prop['encodedjsconfigvars'] ) ) {
 392                         $result_array['encodedjsconfigvars'] = FormatJson::encode(
 393                                 $p_result->getJsConfigVars(), false, FormatJson::ALL_OK
 394                         );
 395                         $result_array[ApiResult::META_SUBELEMENTS][] = 'encodedjsconfigvars';
 396                 }
 397
 398                 if ( isset( $prop['modules'] ) &&
 399                         !isset( $prop['jsconfigvars'] ) && !isset( $prop['encodedjsconfigvars'] ) ) {
 400                         $this->setWarning( 'Property "modules" was set but not "jsconfigvars" ' .
 401                                 'or "encodedjsconfigvars". Configuration variables are necessary ' .
 402                                 'for proper module usage.' );
 403                 }
 404
 405                 if ( isset( $prop['indicators'] ) ) {
 406                         $result_array['indicators'] = (array)$p_result->getIndicators();
 407                         ApiResult::setArrayType( $result_array['indicators'], 'BCkvp', 'name' );
 408                 }
 409
 410                 if ( isset( $prop['iwlinks'] ) ) {
 411                         $result_array['iwlinks'] = $this->formatIWLinks( $p_result->getInterwikiLinks() );
 412                 }
 413
 414                 if ( isset( $prop['wikitext'] ) ) {
 415                         $result_array['wikitext'] = $this->content->serialize( $format );
 416                         $result_array[ApiResult::META_BC_SUBELEMENTS][] = 'wikitext';
 417                         if ( !is_null( $this->pstContent ) ) {
 418                                 $result_array['psttext'] = $this->pstContent->serialize( $format );
 419                                 $result_array[ApiResult::META_BC_SUBELEMENTS][] = 'psttext';
 420                         }
 421                 }
 422                 if ( isset( $prop['properties'] ) ) {
 423                         $result_array['properties'] = (array)$p_result->getProperties();
 424                         ApiResult::setArrayType( $result_array['properties'], 'BCkvp', 'name' );
 425                 }
 426
 427                 if ( isset( $prop['limitreportdata'] ) ) {
 428                         $result_array['limitreportdata'] =
 429                                 $this->formatLimitReportData( $p_result->getLimitReportData() );
 430                 }
 431                 if ( isset( $prop['limitreporthtml'] ) ) {
 432                         $result_array['limitreporthtml'] = EditPage::getPreviewLimitReport( $p_result );
 433                         $result_array[ApiResult::META_BC_SUBELEMENTS][] = 'limitreporthtml';
 434                 }
 435
 436                 if ( isset( $prop['parsetree'] ) || $params['generatexml'] ) {
 437                         if ( $this->content->getModel() != CONTENT_MODEL_WIKITEXT ) {
 438                                 $this->dieUsage( 'parsetree is only supported for wikitext content', 'notwikitext' );
 439                         }
 440
 441                         $wgParser->startExternalParse( $titleObj, $popts, Parser::OT_PREPROCESS );
 442                         $dom = $wgParser->preprocessToDom( $this->content->getNativeData() );
 443                         if ( is_callable( [ $dom, 'saveXML' ] ) ) {
 444                                 $xml = $dom->saveXML();
 445                         } else {
 446                                 $xml = $dom->__toString();
 447                         }
 448                         $result_array['parsetree'] = $xml;
 449                         $result_array[ApiResult::META_BC_SUBELEMENTS][] = 'parsetree';
 450                 }
 451
 452                 $result_mapping = [
 453                         'redirects' => 'r',
 454                         'langlinks' => 'll',
 455                         'categories' => 'cl',
 456                         'links' => 'pl',
 457                         'templates' => 'tl',
 458                         'images' => 'img',
 459                         'externallinks' => 'el',
 460                         'iwlinks' => 'iw',
 461                         'sections' => 's',
 462                         'headitems' => 'hi',
 463                         'modules' => 'm',
 464                         'indicators' => 'ind',
 465                         'modulescripts' => 'm',
 466                         'modulestyles' => 'm',
 467                         'properties' => 'pp',
 468                         'limitreportdata' => 'lr',
 469                 ];
 470                 $this->setIndexedTagNames( $result_array, $result_mapping );
 471                 $result->addValue( null, $this->getModuleName(), $result_array );
 472         }
 473
 474         /**
 475          * Constructs a ParserOptions object
 476          *
 477          * @param WikiPage $pageObj
 478          * @param array $params
 479          *
 480          * @return array [ ParserOptions, ScopedCallback, bool $suppressCache ]
 481          */
 482         protected function makeParserOptions( WikiPage $pageObj, array $params ) {
 483                 $popts = $pageObj->makeParserOptions( $this->getContext() );
 484                 $popts->enableLimitReport( !$params['disablepp'] && !$params['disablelimitreport'] );
 485                 $popts->setIsPreview( $params['preview'] || $params['sectionpreview'] );
 486                 $popts->setIsSectionPreview( $params['sectionpreview'] );
 487                 $popts->setEditSection( !$params['disableeditsection'] );
 488                 if ( $params['disabletidy'] ) {
 489                         $popts->setTidy( false );
 490                 }
 491
 492                 $reset = null;
 493                 $suppressCache = false;
 494                 Hooks::run( 'ApiMakeParserOptions',
 495                         [ $popts, $pageObj->getTitle(), $params, $this, &$reset, &$suppressCache ] );
 496
 497                 return [ $popts, $reset, $suppressCache ];
 498         }
 499
 500         /**
 501          * @param WikiPage $page
 502          * @param ParserOptions $popts
 503          * @param int $pageId
 504          * @param bool $getWikitext
 505          * @return ParserOutput
 506          */
 507         private function getParsedContent( WikiPage $page, $popts, $pageId = null, $getWikitext = false ) {
 508                 $this->content = $this->getContent( $page, $pageId );
 509
 510                 if ( $this->section !== false && $this->content !== null ) {
 511                         // Not cached (save or load)
 512                         return $this->content->getParserOutput( $page->getTitle(), null, $popts );
 513                 }
 514
 515                 // Try the parser cache first
 516                 // getParserOutput will save to Parser cache if able
 517                 $pout = $page->getParserOutput( $popts );
 518                 if ( !$pout ) {
 519                         $this->dieUsage( "There is no revision ID {$page->getLatest()}", 'missingrev' );
 520                 }
 521                 if ( $getWikitext ) {
 522                         $this->content = $page->getContent( Revision::RAW );
 523                 }
 524
 525                 return $pout;
 526         }
 527
 528         /**
 529          * Get the content for the given page and the requested section.
 530          *
 531          * @param WikiPage $page
 532          * @param int $pageId
 533          * @return Content
 534          */
 535         private function getContent( WikiPage $page, $pageId = null ) {
 536                 $content = $page->getContent( Revision::RAW ); // XXX: really raw?
 537
 538                 if ( $this->section !== false && $content !== null ) {
 539                         $content = $this->getSectionContent(
 540                                 $content,
 541                                 !is_null( $pageId ) ? 'page id ' . $pageId : $page->getTitle()->getPrefixedText()
 542                         );
 543                 }
 544                 return $content;
 545         }
 546
 547         /**
 548          * Extract the requested section from the given Content
 549          *
 550          * @param Content $content
 551          * @param string $what Identifies the content in error messages, e.g. page title.
 552          * @return Content|bool
 553          */
 554         private function getSectionContent( Content $content, $what ) {
 555                 // Not cached (save or load)
 556                 $section = $content->getSection( $this->section );
 557                 if ( $section === false ) {
 558                         $this->dieUsage( "There is no section {$this->section} in $what", 'nosuchsection' );
 559                 }
 560                 if ( $section === null ) {
 561                         $this->dieUsage( "Sections are not supported by $what", 'nosuchsection' );
 562                         $section = false;
 563                 }
 564
 565                 return $section;
 566         }
 567
 568         /**
 569          * This mimicks the behavior of EditPage in formatting a summary
 570          *
 571          * @param Title $title of the page being parsed
 572          * @param Array $params the API parameters of the request
 573          * @return Content|bool
 574          */
 575         private function formatSummary( $title, $params ) {
 576                 global $wgParser;
 577                 $summary = !is_null( $params['summary'] ) ? $params['summary'] : '';
 578                 $sectionTitle = !is_null( $params['sectiontitle'] ) ? $params['sectiontitle'] : '';
 579
 580                 if ( $this->section === 'new' && ( $sectionTitle === '' || $summary === '' ) ) {
 581                         if ( $sectionTitle !== '' ) {
 582                                 $summary = $params['sectiontitle'];
 583                         }
 584                         if ( $summary !== '' ) {
 585                                 $summary = wfMessage( 'newsectionsummary' )
 586                                         ->rawParams( $wgParser->stripSectionName( $summary ) )
 587                                                 ->inContentLanguage()->text();
 588                         }
 589                 }
 590                 return Linker::formatComment( $summary, $title, $this->section === 'new' );
 591         }
 592
 593         private function formatLangLinks( $links ) {
 594                 $result = [];
 595                 foreach ( $links as $link ) {
 596                         $entry = [];
 597                         $bits = explode( ':', $link, 2 );
 598                         $title = Title::newFromText( $link );
 599
 600                         $entry['lang'] = $bits[0];
 601                         if ( $title ) {
 602                                 $entry['url'] = wfExpandUrl( $title->getFullURL(), PROTO_CURRENT );
 603                                 // localised language name in 'uselang' language
 604                                 $entry['langname'] = Language::fetchLanguageName(
 605                                         $title->getInterwiki(),
 606                                         $this->getLanguage()->getCode()
 607                                 );
 608
 609                                 // native language name
 610                                 $entry['autonym'] = Language::fetchLanguageName( $title->getInterwiki() );
 611                         }
 612                         ApiResult::setContentValue( $entry, 'title', $bits[1] );
 613                         $result[] = $entry;
 614                 }
 615
 616                 return $result;
 617         }
 618
 619         private function formatCategoryLinks( $links ) {
 620                 $result = [];
 621
 622                 if ( !$links ) {
 623                         return $result;
 624                 }
 625
 626                 // Fetch hiddencat property
 627                 $lb = new LinkBatch;
 628                 $lb->setArray( [ NS_CATEGORY => $links ] );
 629                 $db = $this->getDB();
 630                 $res = $db->select( [ 'page', 'page_props' ],
 631                         [ 'page_title', 'pp_propname' ],
 632                         $lb->constructSet( 'page', $db ),
 633                         __METHOD__,
 634                         [],
 635                         [ 'page_props' => [
 636                                 'LEFT JOIN', [ 'pp_propname' => 'hiddencat', 'pp_page = page_id' ]
 637                         ] ]
 638                 );
 639                 $hiddencats = [];
 640                 foreach ( $res as $row ) {
 641                         $hiddencats[$row->page_title] = isset( $row->pp_propname );
 642                 }
 643
 644                 foreach ( $links as $link => $sortkey ) {
 645                         $entry = [];
 646                         $entry['sortkey'] = $sortkey;
 647                         // array keys will cast numeric category names to ints, so cast back to string
 648                         ApiResult::setContentValue( $entry, 'category', (string)$link );
 649                         if ( !isset( $hiddencats[$link] ) ) {
 650                                 $entry['missing'] = true;
 651                         } elseif ( $hiddencats[$link] ) {
 652                                 $entry['hidden'] = true;
 653                         }
 654                         $result[] = $entry;
 655                 }
 656
 657                 return $result;
 658         }
 659
 660         private function categoriesHtml( $categories ) {
 661                 $context = $this->getContext();
 662                 $context->getOutput()->addCategoryLinks( $categories );
 663
 664                 return $context->getSkin()->getCategories();
 665         }
 666
 667         private function formatLinks( $links ) {
 668                 $result = [];
 669                 foreach ( $links as $ns => $nslinks ) {
 670                         foreach ( $nslinks as $title => $id ) {
 671                                 $entry = [];
 672                                 $entry['ns'] = $ns;
 673                                 ApiResult::setContentValue( $entry, 'title', Title::makeTitle( $ns, $title )->getFullText() );
 674                                 $entry['exists'] = $id != 0;
 675                                 $result[] = $entry;
 676                         }
 677                 }
 678
 679                 return $result;
 680         }
 681
 682         private function formatIWLinks( $iw ) {
 683                 $result = [];
 684                 foreach ( $iw as $prefix => $titles ) {
 685                         foreach ( array_keys( $titles ) as $title ) {
 686                                 $entry = [];
 687                                 $entry['prefix'] = $prefix;
 688
 689                                 $title = Title::newFromText( "{$prefix}:{$title}" );
 690                                 if ( $title ) {
 691                                         $entry['url'] = wfExpandUrl( $title->getFullURL(), PROTO_CURRENT );
 692                                 }
 693
 694                                 ApiResult::setContentValue( $entry, 'title', $title->getFullText() );
 695                                 $result[] = $entry;
 696                         }
 697                 }
 698
 699                 return $result;
 700         }
 701
 702         private function formatHeadItems( $headItems ) {
 703                 $result = [];
 704                 foreach ( $headItems as $tag => $content ) {
 705                         $entry = [];
 706                         $entry['tag'] = $tag;
 707                         ApiResult::setContentValue( $entry, 'content', $content );
 708                         $result[] = $entry;
 709                 }
 710
 711                 return $result;
 712         }
 713
 714         private function formatLimitReportData( $limitReportData ) {
 715                 $result = [];
 716
 717                 foreach ( $limitReportData as $name => $value ) {
 718                         $entry = [];
 719                         $entry['name'] = $name;
 720                         if ( !is_array( $value ) ) {
 721                                 $value = [ $value ];
 722                         }
 723                         ApiResult::setIndexedTagNameRecursive( $value, 'param' );
 724                         $entry = array_merge( $entry, $value );
 725                         $result[] = $entry;
 726                 }
 727
 728                 return $result;
 729         }
 730
 731         private function setIndexedTagNames( &$array, $mapping ) {
 732                 foreach ( $mapping as $key => $name ) {
 733                         if ( isset( $array[$key] ) ) {
 734                                 ApiResult::setIndexedTagName( $array[$key], $name );
 735                         }
 736                 }
 737         }
 738
 739         public function getAllowedParams() {
 740                 return [
 741                         'title' => null,
 742                         'text' => [
 743                                 ApiBase::PARAM_TYPE => 'text',
 744                         ],
 745                         'summary' => null,
 746                         'page' => null,
 747                         'pageid' => [
 748                                 ApiBase::PARAM_TYPE => 'integer',
 749                         ],
 750                         'redirects' => false,
 751                         'oldid' => [
 752                                 ApiBase::PARAM_TYPE => 'integer',
 753                         ],
 754                         'prop' => [
 755                                 ApiBase::PARAM_DFLT => 'text|langlinks|categories|links|templates|' .
 756                                         'images|externallinks|sections|revid|displaytitle|iwlinks|properties',
 757                                 ApiBase::PARAM_ISMULTI => true,
 758                                 ApiBase::PARAM_TYPE => [
 759                                         'text',
 760                                         'langlinks',
 761                                         'categories',
 762                                         'categorieshtml',
 763                                         'links',
 764                                         'templates',
 765                                         'images',
 766                                         'externallinks',
 767                                         'sections',
 768                                         'revid',
 769                                         'displaytitle',
 770                                         'headitems',
 771                                         'headhtml',
 772                                         'modules',
 773                                         'jsconfigvars',
 774                                         'encodedjsconfigvars',
 775                                         'indicators',
 776                                         'iwlinks',
 777                                         'wikitext',
 778                                         'properties',
 779                                         'limitreportdata',
 780                                         'limitreporthtml',
 781                                         'parsetree',
 782                                 ],
 783                                 ApiBase::PARAM_HELP_MSG_PER_VALUE => [
 784                                         'parsetree' => [ 'apihelp-parse-paramvalue-prop-parsetree', CONTENT_MODEL_WIKITEXT ],
 785                                 ],
 786                         ],
 787                         'pst' => false,
 788                         'onlypst' => false,
 789                         'effectivelanglinks' => false,
 790                         'section' => null,
 791                         'sectiontitle' => [
 792                                 ApiBase::PARAM_TYPE => 'string',
 793                         ],
 794                         'disablepp' => [
 795                                 ApiBase::PARAM_DFLT => false,
 796                                 ApiBase::PARAM_DEPRECATED => true,
 797                         ],
 798                         'disablelimitreport' => false,
 799                         'disableeditsection' => false,
 800                         'disabletidy' => false,
 801                         'generatexml' => [
 802                                 ApiBase::PARAM_DFLT => false,
 803                                 ApiBase::PARAM_HELP_MSG => [
 804                                         'apihelp-parse-param-generatexml', CONTENT_MODEL_WIKITEXT
 805                                 ],
 806                                 ApiBase::PARAM_DEPRECATED => true,
 807                         ],
 808                         'preview' => false,
 809                         'sectionpreview' => false,
 810                         'disabletoc' => false,
 811                         'contentformat' => [
 812                                 ApiBase::PARAM_TYPE => ContentHandler::getAllContentFormats(),
 813                         ],
 814                         'contentmodel' => [
 815                                 ApiBase::PARAM_TYPE => ContentHandler::getContentModels(),
 816                         ]
 817                 ];
 818         }
 819
 820         protected function getExamplesMessages() {
 821                 return [
 822                         'action=parse&page=Project:Sandbox'
 823                                 => 'apihelp-parse-example-page',
 824                         'action=parse&text={{Project:Sandbox}}&contentmodel=wikitext'
 825                                 => 'apihelp-parse-example-text',
 826                         'action=parse&text={{PAGENAME}}&title=Test'
 827                                 => 'apihelp-parse-example-texttitle',
 828                         'action=parse&summary=Some+[[link]]&prop='
 829                                 => 'apihelp-parse-example-summary',
 830                 ];
 831         }
 832
 833         public function getHelpUrls() {
 834                 return 'https://www.mediawiki.org/wiki/API:Parsing_wikitext#parse';
 835         }
 836 }