includes/page/Article.php

   1 <?php
   2 /**
   3  * User interface for page actions.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22 use MediaWiki\MediaWikiServices;
  23 use MediaWiki\Revision\MutableRevisionRecord;
  24 use MediaWiki\Revision\RevisionRecord;
  25 use MediaWiki\Revision\SlotRecord;
  26
  27 /**
  28  * Class for viewing MediaWiki article and history.
  29  *
  30  * This maintains WikiPage functions for backwards compatibility.
  31  *
  32  * @todo Move and rewrite code to an Action class
  33  *
  34  * See design.txt for an overview.
  35  * Note: edit user interface and cache support functions have been
  36  * moved to separate EditPage and HTMLFileCache classes.
  37  */
  38 class Article implements Page {
  39         /**
  40          * @var IContextSource|null The context this Article is executed in.
  41          * If null, RequestContext::getMain() is used.
  42          */
  43         protected $mContext;
  44
  45         /** @var WikiPage|null The WikiPage object of this instance */
  46         protected $mPage;
  47
  48         /**
  49          * @var ParserOptions|null ParserOptions object for $wgUser articles.
  50          * Initialized by getParserOptions by calling $this->mPage->makeParserOptions().
  51          */
  52         public $mParserOptions;
  53
  54         /**
  55          * @var Content|null Content of the main slot of $this->mRevision.
  56          * @note This variable is read only, setting it has no effect.
  57          *       Extensions that wish to override the output of Article::view should use a hook.
  58          * @todo MCR: Remove in 1.33
  59          * @deprecated since 1.32
  60          * @since 1.21
  61          */
  62         public $mContentObject;
  63
  64         /**
  65          * @var bool Is the target revision loaded? Set by fetchRevisionRecord().
  66          *
  67          * @deprecated since 1.32. Whether content has been loaded should not be relevant to
  68          * code outside this class.
  69          */
  70         public $mContentLoaded = false;
  71
  72         /**
  73          * @var int|null The oldid of the article that was requested to be shown,
  74          * 0 for the current revision.
  75          * @see $mRevIdFetched
  76          */
  77         public $mOldId;
  78
  79         /** @var Title|null Title from which we were redirected here, if any. */
  80         public $mRedirectedFrom = null;
  81
  82         /** @var string|bool URL to redirect to or false if none */
  83         public $mRedirectUrl = false;
  84
  85         /**
  86          * @var int Revision ID of revision that was loaded.
  87          * @see $mOldId
  88          * @deprecated since 1.32, use getRevIdFetched() instead.
  89          */
  90         public $mRevIdFetched = 0;
  91
  92         /**
  93          * @var Status|null represents the outcome of fetchRevisionRecord().
  94          * $fetchResult->value is the RevisionRecord object, if the operation was successful.
  95          *
  96          * The information in $fetchResult is duplicated by the following deprecated public fields:
  97          * $mRevIdFetched, $mContentLoaded. $mRevision (and $mContentObject) also typically duplicate
  98          * information of the loaded revision, but may be overwritten by extensions or due to errors.
  99          */
 100         private $fetchResult = null;
 101
 102         /**
 103          * @var Revision|null Revision to be shown. Initialized by getOldIDFromRequest()
 104          * or fetchContentObject(). Normally loaded from the database, but may be replaced
 105          * by an extension, or be a fake representing an error message or some such.
 106          * While the output of Article::view is typically based on this revision,
 107          * it may be overwritten by error messages or replaced by extensions.
 108          */
 109         public $mRevision = null;
 110
 111         /**
 112          * @var ParserOutput|null|false The ParserOutput generated for viewing the page,
 113          * initialized by view(). If no ParserOutput could be generated, this is set to false.
 114          * @deprecated since 1.32
 115          */
 116         public $mParserOutput = null;
 117
 118         /**
 119          * @var bool Whether render() was called. With the way subclasses work
 120          * here, there doesn't seem to be any other way to stop calling
 121          * OutputPage::enableSectionEditLinks() and still have it work as it did before.
 122          */
 123         protected $viewIsRenderAction = false;
 124
 125         /**
 126          * Constructor and clear the article
 127          * @param Title $title Reference to a Title object.
 128          * @param int|null $oldId Revision ID, null to fetch from request, zero for current
 129          */
 130         public function __construct( Title $title, $oldId = null ) {
 131                 $this->mOldId = $oldId;
 132                 $this->mPage = $this->newPage( $title );
 133         }
 134
 135         /**
 136          * @param Title $title
 137          * @return WikiPage
 138          */
 139         protected function newPage( Title $title ) {
 140                 return new WikiPage( $title );
 141         }
 142
 143         /**
 144          * Constructor from a page id
 145          * @param int $id Article ID to load
 146          * @return Article|null
 147          */
 148         public static function newFromID( $id ) {
 149                 $t = Title::newFromID( $id );
 150                 return $t == null ? null : new static( $t );
 151         }
 152
 153         /**
 154          * Create an Article object of the appropriate class for the given page.
 155          *
 156          * @param Title $title
 157          * @param IContextSource $context
 158          * @return Article
 159          */
 160         public static function newFromTitle( $title, IContextSource $context ) {
 161                 if ( NS_MEDIA == $title->getNamespace() ) {
 162                         // XXX: This should not be here, but where should it go?
 163                         $title = Title::makeTitle( NS_FILE, $title->getDBkey() );
 164                 }
 165
 166                 $page = null;
 167                 Hooks::run( 'ArticleFromTitle', [ &$title, &$page, $context ] );
 168                 if ( !$page ) {
 169                         switch ( $title->getNamespace() ) {
 170                                 case NS_FILE:
 171                                         $page = new ImagePage( $title );
 172                                         break;
 173                                 case NS_CATEGORY:
 174                                         $page = new CategoryPage( $title );
 175                                         break;
 176                                 default:
 177                                         $page = new Article( $title );
 178                         }
 179                 }
 180                 $page->setContext( $context );
 181
 182                 return $page;
 183         }
 184
 185         /**
 186          * Create an Article object of the appropriate class for the given page.
 187          *
 188          * @param WikiPage $page
 189          * @param IContextSource $context
 190          * @return Article
 191          */
 192         public static function newFromWikiPage( WikiPage $page, IContextSource $context ) {
 193                 $article = self::newFromTitle( $page->getTitle(), $context );
 194                 $article->mPage = $page; // override to keep process cached vars
 195                 return $article;
 196         }
 197
 198         /**
 199          * Get the page this view was redirected from
 200          * @return Title|null
 201          * @since 1.28
 202          */
 203         public function getRedirectedFrom() {
 204                 return $this->mRedirectedFrom;
 205         }
 206
 207         /**
 208          * Tell the page view functions that this view was redirected
 209          * from another page on the wiki.
 210          * @param Title $from
 211          */
 212         public function setRedirectedFrom( Title $from ) {
 213                 $this->mRedirectedFrom = $from;
 214         }
 215
 216         /**
 217          * Get the title object of the article
 218          *
 219          * @return Title Title object of this page
 220          */
 221         public function getTitle() {
 222                 return $this->mPage->getTitle();
 223         }
 224
 225         /**
 226          * Get the WikiPage object of this instance
 227          *
 228          * @since 1.19
 229          * @return WikiPage
 230          */
 231         public function getPage() {
 232                 return $this->mPage;
 233         }
 234
 235         /**
 236          * Clear the object
 237          */
 238         public function clear() {
 239                 $this->mContentLoaded = false;
 240
 241                 $this->mRedirectedFrom = null; # Title object if set
 242                 $this->mRevIdFetched = 0;
 243                 $this->mRedirectUrl = false;
 244                 $this->mRevision = null;
 245                 $this->mContentObject = null;
 246                 $this->fetchResult = null;
 247
 248                 // TODO hard-deprecate direct access to public fields
 249
 250                 $this->mPage->clear();
 251         }
 252
 253         /**
 254          * Returns a Content object representing the pages effective display content,
 255          * not necessarily the revision's content!
 256          *
 257          * Note that getContent does not follow redirects anymore.
 258          * If you need to fetch redirectable content easily, try
 259          * the shortcut in WikiPage::getRedirectTarget()
 260          *
 261          * This function has side effects! Do not use this function if you
 262          * only want the real revision text if any.
 263          *
 264          * @deprecated since 1.32, use getRevisionFetched() or fetchRevisionRecord() instead.
 265          *
 266          * @return Content
 267          *
 268          * @since 1.21
 269          */
 270         protected function getContentObject() {
 271                 if ( $this->mPage->getId() === 0 ) {
 272                         $content = $this->getSubstituteContent();
 273                 } else {
 274                         $this->fetchContentObject();
 275                         $content = $this->mContentObject;
 276                 }
 277
 278                 return $content;
 279         }
 280
 281         /**
 282          * Returns Content object to use when the page does not exist.
 283          *
 284          * @return Content
 285          */
 286         private function getSubstituteContent() {
 287                 # If this is a MediaWiki:x message, then load the messages
 288                 # and return the message value for x.
 289                 if ( $this->getTitle()->getNamespace() == NS_MEDIAWIKI ) {
 290                         $text = $this->getTitle()->getDefaultMessageText();
 291                         if ( $text === false ) {
 292                                 $text = '';
 293                         }
 294
 295                         $content = ContentHandler::makeContent( $text, $this->getTitle() );
 296                 } else {
 297                         $message = $this->getContext()->getUser()->isLoggedIn() ? 'noarticletext' : 'noarticletextanon';
 298                         $content = new MessageContent( $message, null );
 299                 }
 300
 301                 return $content;
 302         }
 303
 304         /**
 305          * Returns ParserOutput to use when a page does not exist. In some cases, we still want to show
 306          * "virtual" content, e.g. in the MediaWiki namespace, or in the File namespace for non-local
 307          * files.
 308          *
 309          * @param ParserOptions $options
 310          *
 311          * @return ParserOutput
 312          */
 313         protected function getEmptyPageParserOutput( ParserOptions $options ) {
 314                 $content = $this->getSubstituteContent();
 315
 316                 return $content->getParserOutput( $this->getTitle(), 0, $options );
 317         }
 318
 319         /**
 320          * @see getOldIDFromRequest()
 321          * @see getRevIdFetched()
 322          *
 323          * @return int The oldid of the article that is was requested in the constructor or via the
 324          *         context's WebRequest.
 325          */
 326         public function getOldID() {
 327                 if ( is_null( $this->mOldId ) ) {
 328                         $this->mOldId = $this->getOldIDFromRequest();
 329                 }
 330
 331                 return $this->mOldId;
 332         }
 333
 334         /**
 335          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 336          *
 337          * @return int The old id for the request
 338          */
 339         public function getOldIDFromRequest() {
 340                 $this->mRedirectUrl = false;
 341
 342                 $request = $this->getContext()->getRequest();
 343                 $oldid = $request->getIntOrNull( 'oldid' );
 344
 345                 if ( $oldid === null ) {
 346                         return 0;
 347                 }
 348
 349                 if ( $oldid !== 0 ) {
 350                         # Load the given revision and check whether the page is another one.
 351                         # In that case, update this instance to reflect the change.
 352                         if ( $oldid === $this->mPage->getLatest() ) {
 353                                 $this->mRevision = $this->mPage->getRevision();
 354                         } else {
 355                                 $this->mRevision = Revision::newFromId( $oldid );
 356                                 if ( $this->mRevision !== null ) {
 357                                         // Revision title doesn't match the page title given?
 358                                         if ( $this->mPage->getId() != $this->mRevision->getPage() ) {
 359                                                 $function = get_class( $this->mPage ) . '::newFromID';
 360                                                 $this->mPage = $function( $this->mRevision->getPage() );
 361                                         }
 362                                 }
 363                         }
 364                 }
 365
 366                 if ( $request->getVal( 'direction' ) == 'next' ) {
 367                         $nextid = $this->getTitle()->getNextRevisionID( $oldid );
 368                         if ( $nextid ) {
 369                                 $oldid = $nextid;
 370                                 $this->mRevision = null;
 371                         } else {
 372                                 $this->mRedirectUrl = $this->getTitle()->getFullURL( 'redirect=no' );
 373                         }
 374                 } elseif ( $request->getVal( 'direction' ) == 'prev' ) {
 375                         $previd = $this->getTitle()->getPreviousRevisionID( $oldid );
 376                         if ( $previd ) {
 377                                 $oldid = $previd;
 378                                 $this->mRevision = null;
 379                         }
 380                 }
 381
 382                 $this->mRevIdFetched = $this->mRevision ? $this->mRevision->getId() : 0;
 383
 384                 return $oldid;
 385         }
 386
 387         /**
 388          * Get text content object
 389          * Does *NOT* follow redirects.
 390          * @todo When is this null?
 391          * @deprecated since 1.32, use fetchRevisionRecord() instead.
 392          *
 393          * @note Code that wants to retrieve page content from the database should
 394          * use WikiPage::getContent().
 395          *
 396          * @return Content|null|bool
 397          *
 398          * @since 1.21
 399          */
 400         protected function fetchContentObject() {
 401                 if ( !$this->mContentLoaded ) {
 402                         $this->fetchRevisionRecord();
 403                 }
 404
 405                 return $this->mContentObject;
 406         }
 407
 408         /**
 409          * Fetches the revision to work on.
 410          * The revision is typically loaded from the database, but may also be a fake representing
 411          * an error message or content supplied by an extension. Refer to $this->fetchResult for
 412          * the revision actually loaded from the database, and any errors encountered while doing
 413          * that.
 414          *
 415          * @return RevisionRecord|null
 416          */
 417         protected function fetchRevisionRecord() {
 418                 if ( $this->fetchResult ) {
 419                         return $this->mRevision ? $this->mRevision->getRevisionRecord() : null;
 420                 }
 421
 422                 $this->mContentLoaded = true;
 423                 $this->mContentObject = null;
 424
 425                 $oldid = $this->getOldID();
 426
 427                 // $this->mRevision might already be fetched by getOldIDFromRequest()
 428                 if ( !$this->mRevision ) {
 429                         if ( !$oldid ) {
 430                                 $this->mRevision = $this->mPage->getRevision();
 431
 432                                 if ( !$this->mRevision ) {
 433                                         wfDebug( __METHOD__ . " failed to find page data for title " .
 434                                                 $this->getTitle()->getPrefixedText() . "\n" );
 435
 436                                         // Just for sanity, output for this case is done by showMissingArticle().
 437                                         $this->fetchResult = Status::newFatal( 'noarticletext' );
 438                                         $this->applyContentOverride( $this->makeFetchErrorContent() );
 439                                         return null;
 440                                 }
 441                         } else {
 442                                 $this->mRevision = Revision::newFromId( $oldid );
 443
 444                                 if ( !$this->mRevision ) {
 445                                         wfDebug( __METHOD__ . " failed to load revision, rev_id $oldid\n" );
 446
 447                                         $this->fetchResult = Status::newFatal( 'missing-revision', $oldid );
 448                                         $this->applyContentOverride( $this->makeFetchErrorContent() );
 449                                         return null;
 450                                 }
 451                         }
 452                 }
 453
 454                 $this->mRevIdFetched = $this->mRevision->getId();
 455                 $this->fetchResult = Status::newGood( $this->mRevision );
 456
 457                 if ( !$this->mRevision->userCan( Revision::DELETED_TEXT, $this->getContext()->getUser() ) ) {
 458                         wfDebug( __METHOD__ . " failed to retrieve content of revision " .
 459                                 $this->mRevision->getId() . "\n" );
 460
 461                         // Just for sanity, output for this case is done by showDeletedRevisionHeader().
 462                         $this->fetchResult = Status::newFatal( 'rev-deleted-text-permission' );
 463                         $this->applyContentOverride( $this->makeFetchErrorContent() );
 464                         return null;
 465                 }
 466
 467                 if ( Hooks::isRegistered( 'ArticleAfterFetchContentObject' ) ) {
 468                         $contentObject = $this->mRevision->getContent(
 469                                 Revision::FOR_THIS_USER,
 470                                 $this->getContext()->getUser()
 471                         );
 472
 473                         $hookContentObject = $contentObject;
 474
 475                                 // Avoid PHP 7.1 warning of passing $this by reference
 476                         $articlePage = $this;
 477
 478                         Hooks::run(
 479                                 'ArticleAfterFetchContentObject',
 480                                 [ &$articlePage, &$hookContentObject ],
 481                                 '1.32'
 482                         );
 483
 484                         if ( $hookContentObject !== $contentObject ) {
 485                                 // A hook handler is trying to override the content
 486                                 $this->applyContentOverride( $hookContentObject );
 487                         }
 488                 }
 489
 490                 // For B/C only
 491                 $this->mContentObject = $this->mRevision->getContent(
 492                         Revision::FOR_THIS_USER,
 493                         $this->getContext()->getUser()
 494                 );
 495
 496                 return $this->mRevision->getRevisionRecord();
 497         }
 498
 499         /**
 500          * Returns a Content object representing any error in $this->fetchContent, or null
 501          * if there is no such error.
 502          *
 503          * @return Content|null
 504          */
 505         private function makeFetchErrorContent() {
 506                 if ( !$this->fetchResult || $this->fetchResult->isOK() ) {
 507                         return null;
 508                 }
 509
 510                 return new MessageContent( $this->fetchResult->getMessage() );
 511         }
 512
 513         /**
 514          * Applies a content override by constructing a fake Revision object and assigning
 515          * it to mRevision. The fake revision will not have a user, timestamp or summary set.
 516          *
 517          * This mechanism exists mainly to accommodate extensions that use the
 518          * ArticleAfterFetchContentObject. Once that hook has been removed, there should no longer
 519          * be a need for a fake revision object. fetchRevisionRecord() presently also uses this mechanism
 520          * to report errors, but that could be changed to use $this->fetchResult instead.
 521          *
 522          * @param Content $override Content to be used instead of the actual page content,
 523          *        coming from an extension or representing an error message.
 524          */
 525         private function applyContentOverride( Content $override ) {
 526                 // Construct a fake revision
 527                 $rev = new MutableRevisionRecord( $this->getTitle() );
 528                 $rev->setContent( SlotRecord::MAIN, $override );
 529
 530                 $this->mRevision = new Revision( $rev );
 531
 532                 // For B/C only
 533                 $this->mContentObject = $override;
 534         }
 535
 536         /**
 537          * Returns true if the currently-referenced revision is the current edit
 538          * to this page (and it exists).
 539          * @return bool
 540          */
 541         public function isCurrent() {
 542                 # If no oldid, this is the current version.
 543                 if ( $this->getOldID() == 0 ) {
 544                         return true;
 545                 }
 546
 547                 return $this->mPage->exists() && $this->mRevision && $this->mRevision->isCurrent();
 548         }
 549
 550         /**
 551          * Get the fetched Revision object depending on request parameters or null
 552          * on failure. The revision returned may be a fake representing an error message or
 553          * wrapping content supplied by an extension. Refer to $this->fetchResult for the
 554          * revision actually loaded from the database.
 555          *
 556          * @since 1.19
 557          * @return Revision|null
 558          */
 559         public function getRevisionFetched() {
 560                 $this->fetchRevisionRecord();
 561
 562                 if ( $this->fetchResult->isOK() ) {
 563                         return $this->mRevision;
 564                 }
 565         }
 566
 567         /**
 568          * Use this to fetch the rev ID used on page views
 569          *
 570          * Before fetchRevisionRecord was called, this returns the page's latest revision,
 571          * regardless of what getOldID() returns.
 572          *
 573          * @return int Revision ID of last article revision
 574          */
 575         public function getRevIdFetched() {
 576                 if ( $this->fetchResult && $this->fetchResult->isOK() ) {
 577                         return $this->fetchResult->value->getId();
 578                 } else {
 579                         return $this->mPage->getLatest();
 580                 }
 581         }
 582
 583         /**
 584          * This is the default action of the index.php entry point: just view the
 585          * page of the given title.
 586          */
 587         public function view() {
 588                 global $wgUseFileCache, $wgDebugToolbar;
 589
 590                 # Get variables from query string
 591                 # As side effect this will load the revision and update the title
 592                 # in a revision ID is passed in the request, so this should remain
 593                 # the first call of this method even if $oldid is used way below.
 594                 $oldid = $this->getOldID();
 595
 596                 $user = $this->getContext()->getUser();
 597                 # Another whitelist check in case getOldID() is altering the title
 598                 $permErrors = $this->getTitle()->getUserPermissionsErrors( 'read', $user );
 599                 if ( count( $permErrors ) ) {
 600                         wfDebug( __METHOD__ . ": denied on secondary read check\n" );
 601                         throw new PermissionsError( 'read', $permErrors );
 602                 }
 603
 604                 $outputPage = $this->getContext()->getOutput();
 605                 # getOldID() may as well want us to redirect somewhere else
 606                 if ( $this->mRedirectUrl ) {
 607                         $outputPage->redirect( $this->mRedirectUrl );
 608                         wfDebug( __METHOD__ . ": redirecting due to oldid\n" );
 609
 610                         return;
 611                 }
 612
 613                 # If we got diff in the query, we want to see a diff page instead of the article.
 614                 if ( $this->getContext()->getRequest()->getCheck( 'diff' ) ) {
 615                         wfDebug( __METHOD__ . ": showing diff page\n" );
 616                         $this->showDiffPage();
 617
 618                         return;
 619                 }
 620
 621                 # Set page title (may be overridden by DISPLAYTITLE)
 622                 $outputPage->setPageTitle( $this->getTitle()->getPrefixedText() );
 623
 624                 $outputPage->setArticleFlag( true );
 625                 # Allow frames by default
 626                 $outputPage->allowClickjacking();
 627
 628                 $parserCache = MediaWikiServices::getInstance()->getParserCache();
 629
 630                 $parserOptions = $this->getParserOptions();
 631                 $poOptions = [];
 632                 # Render printable version, use printable version cache
 633                 if ( $outputPage->isPrintable() ) {
 634                         $parserOptions->setIsPrintable( true );
 635                         $poOptions['enableSectionEditLinks'] = false;
 636                 } elseif ( $this->viewIsRenderAction
 637                         || !$this->isCurrent() || !$this->getTitle()->quickUserCan( 'edit', $user )
 638                 ) {
 639                         $poOptions['enableSectionEditLinks'] = false;
 640                 }
 641
 642                 # Try client and file cache
 643                 if ( !$wgDebugToolbar && $oldid === 0 && $this->mPage->checkTouched() ) {
 644                         # Try to stream the output from file cache
 645                         if ( $wgUseFileCache && $this->tryFileCache() ) {
 646                                 wfDebug( __METHOD__ . ": done file cache\n" );
 647                                 # tell wgOut that output is taken care of
 648                                 $outputPage->disable();
 649                                 $this->mPage->doViewUpdates( $user, $oldid );
 650
 651                                 return;
 652                         }
 653                 }
 654
 655                 # Should the parser cache be used?
 656                 $useParserCache = $this->mPage->shouldCheckParserCache( $parserOptions, $oldid );
 657                 wfDebug( 'Article::view using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
 658                 if ( $user->getStubThreshold() ) {
 659                         MediaWikiServices::getInstance()->getStatsdDataFactory()->increment( 'pcache_miss_stub' );
 660                 }
 661
 662                 $this->showRedirectedFromHeader();
 663                 $this->showNamespaceHeader();
 664
 665                 # Iterate through the possible ways of constructing the output text.
 666                 # Keep going until $outputDone is set, or we run out of things to do.
 667                 $pass = 0;
 668                 $outputDone = false;
 669                 $this->mParserOutput = false;
 670
 671                 while ( !$outputDone && ++$pass ) {
 672                         switch ( $pass ) {
 673                                 case 1:
 674                                         // Avoid PHP 7.1 warning of passing $this by reference
 675                                         $articlePage = $this;
 676                                         Hooks::run( 'ArticleViewHeader', [ &$articlePage, &$outputDone, &$useParserCache ] );
 677                                         break;
 678                                 case 2:
 679                                         # Early abort if the page doesn't exist
 680                                         if ( !$this->mPage->exists() ) {
 681                                                 wfDebug( __METHOD__ . ": showing missing article\n" );
 682                                                 $this->showMissingArticle();
 683                                                 $this->mPage->doViewUpdates( $user );
 684                                                 return;
 685                                         }
 686
 687                                         # Try the parser cache
 688                                         if ( $useParserCache ) {
 689                                                 $this->mParserOutput = $parserCache->get( $this->mPage, $parserOptions );
 690
 691                                                 if ( $this->mParserOutput !== false ) {
 692                                                         if ( $oldid ) {
 693                                                                 wfDebug( __METHOD__ . ": showing parser cache contents for current rev permalink\n" );
 694                                                                 $this->setOldSubtitle( $oldid );
 695                                                         } else {
 696                                                                 wfDebug( __METHOD__ . ": showing parser cache contents\n" );
 697                                                         }
 698                                                         $outputPage->addParserOutput( $this->mParserOutput, $poOptions );
 699                                                         # Ensure that UI elements requiring revision ID have
 700                                                         # the correct version information.
 701                                                         $outputPage->setRevisionId( $this->mPage->getLatest() );
 702                                                         # Preload timestamp to avoid a DB hit
 703                                                         $cachedTimestamp = $this->mParserOutput->getTimestamp();
 704                                                         if ( $cachedTimestamp !== null ) {
 705                                                                 $outputPage->setRevisionTimestamp( $cachedTimestamp );
 706                                                                 $this->mPage->setTimestamp( $cachedTimestamp );
 707                                                         }
 708                                                         $outputDone = true;
 709                                                 }
 710                                         }
 711                                         break;
 712                                 case 3:
 713                                         # Are we looking at an old revision
 714                                         $rev = $this->fetchRevisionRecord();
 715                                         if ( $oldid && $this->fetchResult->isOK() ) {
 716                                                 $this->setOldSubtitle( $oldid );
 717
 718                                                 if ( !$this->showDeletedRevisionHeader() ) {
 719                                                         wfDebug( __METHOD__ . ": cannot view deleted revision\n" );
 720                                                         return;
 721                                                 }
 722                                         }
 723
 724                                         # Ensure that UI elements requiring revision ID have
 725                                         # the correct version information.
 726                                         $outputPage->setRevisionId( $this->getRevIdFetched() );
 727                                         # Preload timestamp to avoid a DB hit
 728                                         $outputPage->setRevisionTimestamp( $this->mPage->getTimestamp() );
 729
 730                                         # Pages containing custom CSS or JavaScript get special treatment
 731                                         if ( $this->getTitle()->isSiteConfigPage() || $this->getTitle()->isUserConfigPage() ) {
 732                                                 $dir = $this->getContext()->getLanguage()->getDir();
 733                                                 $lang = $this->getContext()->getLanguage()->getHtmlCode();
 734
 735                                                 $outputPage->wrapWikiMsg(
 736                                                         "<div id='mw-clearyourcache' lang='$lang' dir='$dir' class='mw-content-$dir'>\n$1\n</div>",
 737                                                         'clearyourcache'
 738                                                 );
 739                                         } elseif ( !Hooks::run( 'ArticleRevisionViewCustom', [
 740                                                         $rev,
 741                                                         $this->getTitle(),
 742                                                         $oldid,
 743                                                         $outputPage,
 744                                                 ] )
 745                                         ) {
 746                                                 // NOTE: sync with hooks called in DifferenceEngine::renderNewRevision()
 747                                                 // Allow extensions do their own custom view for certain pages
 748                                                 $outputDone = true;
 749                                         } elseif ( !Hooks::run( 'ArticleContentViewCustom',
 750                                                 [ $this->fetchContentObject(), $this->getTitle(), $outputPage ], '1.32' )
 751                                         ) {
 752                                                 // NOTE: sync with hooks called in DifferenceEngine::renderNewRevision()
 753                                                 // Allow extensions do their own custom view for certain pages
 754                                                 $outputDone = true;
 755                                         }
 756                                         break;
 757                                 case 4:
 758                                         # Run the parse, protected by a pool counter
 759                                         wfDebug( __METHOD__ . ": doing uncached parse\n" );
 760
 761                                         $rev = $this->fetchRevisionRecord();
 762                                         $error = null;
 763
 764                                         if ( $rev ) {
 765                                                 $poolArticleView = new PoolWorkArticleView(
 766                                                         $this->getPage(),
 767                                                         $parserOptions,
 768                                                         $this->getRevIdFetched(),
 769                                                         $useParserCache,
 770                                                         $rev,
 771                                                         // permission checking was done earlier via showDeletedRevisionHeader()
 772                                                         RevisionRecord::RAW
 773                                                 );
 774                                                 $ok = $poolArticleView->execute();
 775                                                 $error = $poolArticleView->getError();
 776                                                 $this->mParserOutput = $poolArticleView->getParserOutput() ?: null;
 777
 778                                                 # Don't cache a dirty ParserOutput object
 779                                                 if ( $poolArticleView->getIsDirty() ) {
 780                                                         $outputPage->setCdnMaxage( 0 );
 781                                                         $outputPage->addHTML( "<!-- parser cache is expired, " .
 782                                                                 "sending anyway due to pool overload-->\n" );
 783                                                 }
 784                                         } else {
 785                                                 $ok = false;
 786                                         }
 787
 788                                         if ( !$ok ) {
 789                                                 if ( $error ) {
 790                                                         $outputPage->clearHTML(); // for release() errors
 791                                                         $outputPage->enableClientCache( false );
 792                                                         $outputPage->setRobotPolicy( 'noindex,nofollow' );
 793
 794                                                         $errortext = $error->getWikiText( false, 'view-pool-error' );
 795                                                         $outputPage->wrapWikiTextAsInterface( 'errorbox', $errortext );
 796                                                 }
 797                                                 # Connection or timeout error
 798                                                 return;
 799                                         }
 800
 801                                         if ( $this->mParserOutput ) {
 802                                                 $outputPage->addParserOutput( $this->mParserOutput, $poOptions );
 803                                         }
 804
 805                                         if ( $rev && $this->getRevisionRedirectTarget( $rev ) ) {
 806                                                 $outputPage->addSubtitle( "<span id=\"redirectsub\">" .
 807                                                         $this->getContext()->msg( 'redirectpagesub' )->parse() . "</span>" );
 808                                         }
 809
 810                                         $outputDone = true;
 811                                         break;
 812                                 # Should be unreachable, but just in case...
 813                                 default:
 814                                         break 2;
 815                         }
 816                 }
 817
 818                 // Get the ParserOutput actually *displayed* here.
 819                 // Note that $this->mParserOutput is the *current*/oldid version output.
 820                 // Note that the ArticleViewHeader hook is allowed to set $outputDone to a
 821                 // ParserOutput instance.
 822                 $pOutput = ( $outputDone instanceof ParserOutput )
 823                         ? $outputDone // object fetched by hook
 824                         : ( $this->mParserOutput ?: null ); // ParserOutput or null, avoid false
 825
 826                 # Adjust title for main page & pages with displaytitle
 827                 if ( $pOutput ) {
 828                         $this->adjustDisplayTitle( $pOutput );
 829                 }
 830
 831                 # For the main page, overwrite the <title> element with the con-
 832                 # tents of 'pagetitle-view-mainpage' instead of the default (if
 833                 # that's not empty).
 834                 # This message always exists because it is in the i18n files
 835                 if ( $this->getTitle()->isMainPage() ) {
 836                         $msg = wfMessage( 'pagetitle-view-mainpage' )->inContentLanguage();
 837                         if ( !$msg->isDisabled() ) {
 838                                 $outputPage->setHTMLTitle( $msg->title( $this->getTitle() )->text() );
 839                         }
 840                 }
 841
 842                 # Use adaptive TTLs for CDN so delayed/failed purges are noticed less often.
 843                 # This could use getTouched(), but that could be scary for major template edits.
 844                 $outputPage->adaptCdnTTL( $this->mPage->getTimestamp(), IExpiringStore::TTL_DAY );
 845
 846                 # Check for any __NOINDEX__ tags on the page using $pOutput
 847                 $policy = $this->getRobotPolicy( 'view', $pOutput ?: null );
 848                 $outputPage->setIndexPolicy( $policy['index'] );
 849                 $outputPage->setFollowPolicy( $policy['follow'] ); // FIXME: test this
 850
 851                 $this->showViewFooter();
 852                 $this->mPage->doViewUpdates( $user, $oldid ); // FIXME: test this
 853
 854                 # Load the postEdit module if the user just saved this revision
 855                 # See also EditPage::setPostEditCookie
 856                 $request = $this->getContext()->getRequest();
 857                 $cookieKey = EditPage::POST_EDIT_COOKIE_KEY_PREFIX . $this->getRevIdFetched();
 858                 $postEdit = $request->getCookie( $cookieKey );
 859                 if ( $postEdit ) {
 860                         # Clear the cookie. This also prevents caching of the response.
 861                         $request->response()->clearCookie( $cookieKey );
 862                         $outputPage->addJsConfigVars( 'wgPostEdit', $postEdit );
 863                         $outputPage->addModules( 'mediawiki.action.view.postEdit' ); // FIXME: test this
 864                 }
 865         }
 866
 867         /**
 868          * @param RevisionRecord $revision
 869          * @return null|Title
 870          */
 871         private function getRevisionRedirectTarget( RevisionRecord $revision ) {
 872                 // TODO: find a *good* place for the code that determines the redirect target for
 873                 // a given revision!
 874                 // NOTE: Use main slot content. Compare code in DerivedPageDataUpdater::revisionIsRedirect.
 875                 $content = $revision->getContent( SlotRecord::MAIN );
 876                 return $content ? $content->getRedirectTarget() : null;
 877         }
 878
 879         /**
 880          * Adjust title for pages with displaytitle, -{T|}- or language conversion
 881          * @param ParserOutput $pOutput
 882          */
 883         public function adjustDisplayTitle( ParserOutput $pOutput ) {
 884                 $out = $this->getContext()->getOutput();
 885
 886                 # Adjust the title if it was set by displaytitle, -{T|}- or language conversion
 887                 $titleText = $pOutput->getTitleText();
 888                 if ( strval( $titleText ) !== '' ) {
 889                         $out->setPageTitle( $titleText );
 890                         $out->setDisplayTitle( $titleText );
 891                 }
 892         }
 893
 894         /**
 895          * Show a diff page according to current request variables. For use within
 896          * Article::view() only, other callers should use the DifferenceEngine class.
 897          */
 898         protected function showDiffPage() {
 899                 $request = $this->getContext()->getRequest();
 900                 $user = $this->getContext()->getUser();
 901                 $diff = $request->getVal( 'diff' );
 902                 $rcid = $request->getVal( 'rcid' );
 903                 $diffOnly = $request->getBool( 'diffonly', $user->getOption( 'diffonly' ) );
 904                 $purge = $request->getVal( 'action' ) == 'purge';
 905                 $unhide = $request->getInt( 'unhide' ) == 1;
 906                 $oldid = $this->getOldID();
 907
 908                 $rev = $this->getRevisionFetched();
 909
 910                 if ( !$rev ) {
 911                         $this->getContext()->getOutput()->setPageTitle( wfMessage( 'errorpagetitle' ) );
 912                         $msg = $this->getContext()->msg( 'difference-missing-revision' )
 913                                 ->params( $oldid )
 914                                 ->numParams( 1 )
 915                                 ->parseAsBlock();
 916                         $this->getContext()->getOutput()->addHTML( $msg );
 917                         return;
 918                 }
 919
 920                 $contentHandler = $rev->getContentHandler();
 921                 $de = $contentHandler->createDifferenceEngine(
 922                         $this->getContext(),
 923                         $oldid,
 924                         $diff,
 925                         $rcid,
 926                         $purge,
 927                         $unhide
 928                 );
 929
 930                 // DifferenceEngine directly fetched the revision:
 931                 $this->mRevIdFetched = $de->getNewid();
 932                 $de->showDiffPage( $diffOnly );
 933
 934                 // Run view updates for the newer revision being diffed (and shown
 935                 // below the diff if not $diffOnly).
 936                 list( $old, $new ) = $de->mapDiffPrevNext( $oldid, $diff );
 937                 // New can be false, convert it to 0 - this conveniently means the latest revision
 938                 $this->mPage->doViewUpdates( $user, (int)$new );
 939         }
 940
 941         /**
 942          * Get the robot policy to be used for the current view
 943          * @param string $action The action= GET parameter
 944          * @param ParserOutput|null $pOutput
 945          * @return array The policy that should be set
 946          * @todo actions other than 'view'
 947          */
 948         public function getRobotPolicy( $action, ParserOutput $pOutput = null ) {
 949                 global $wgArticleRobotPolicies, $wgNamespaceRobotPolicies, $wgDefaultRobotPolicy;
 950
 951                 $ns = $this->getTitle()->getNamespace();
 952
 953                 # Don't index user and user talk pages for blocked users (T13443)
 954                 if ( ( $ns == NS_USER || $ns == NS_USER_TALK ) && !$this->getTitle()->isSubpage() ) {
 955                         $specificTarget = null;
 956                         $vagueTarget = null;
 957                         $titleText = $this->getTitle()->getText();
 958                         if ( IP::isValid( $titleText ) ) {
 959                                 $vagueTarget = $titleText;
 960                         } else {
 961                                 $specificTarget = $titleText;
 962                         }
 963                         if ( Block::newFromTarget( $specificTarget, $vagueTarget ) instanceof Block ) {
 964                                 return [
 965                                         'index' => 'noindex',
 966                                         'follow' => 'nofollow'
 967                                 ];
 968                         }
 969                 }
 970
 971                 if ( $this->mPage->getId() === 0 || $this->getOldID() ) {
 972                         # Non-articles (special pages etc), and old revisions
 973                         return [
 974                                 'index' => 'noindex',
 975                                 'follow' => 'nofollow'
 976                         ];
 977                 } elseif ( $this->getContext()->getOutput()->isPrintable() ) {
 978                         # Discourage indexing of printable versions, but encourage following
 979                         return [
 980                                 'index' => 'noindex',
 981                                 'follow' => 'follow'
 982                         ];
 983                 } elseif ( $this->getContext()->getRequest()->getInt( 'curid' ) ) {
 984                         # For ?curid=x urls, disallow indexing
 985                         return [
 986                                 'index' => 'noindex',
 987                                 'follow' => 'follow'
 988                         ];
 989                 }
 990
 991                 # Otherwise, construct the policy based on the various config variables.
 992                 $policy = self::formatRobotPolicy( $wgDefaultRobotPolicy );
 993
 994                 if ( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 995                         # Honour customised robot policies for this namespace
 996                         $policy = array_merge(
 997                                 $policy,
 998                                 self::formatRobotPolicy( $wgNamespaceRobotPolicies[$ns] )
 999                         );
1000                 }
1001                 if ( $this->getTitle()->canUseNoindex() && is_object( $pOutput ) && $pOutput->getIndexPolicy() ) {
1002                         # __INDEX__ and __NOINDEX__ magic words, if allowed. Incorporates
1003                         # a final sanity check that we have really got the parser output.
1004                         $policy = array_merge(
1005                                 $policy,
1006                                 [ 'index' => $pOutput->getIndexPolicy() ]
1007                         );
1008                 }
1009
1010                 if ( isset( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] ) ) {
1011                         # (T16900) site config can override user-defined __INDEX__ or __NOINDEX__
1012                         $policy = array_merge(
1013                                 $policy,
1014                                 self::formatRobotPolicy( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] )
1015                         );
1016                 }
1017
1018                 return $policy;
1019         }
1020
1021         /**
1022          * Converts a String robot policy into an associative array, to allow
1023          * merging of several policies using array_merge().
1024          * @param array|string $policy Returns empty array on null/false/'', transparent
1025          *   to already-converted arrays, converts string.
1026          * @return array 'index' => \<indexpolicy\>, 'follow' => \<followpolicy\>
1027          */
1028         public static function formatRobotPolicy( $policy ) {
1029                 if ( is_array( $policy ) ) {
1030                         return $policy;
1031                 } elseif ( !$policy ) {
1032                         return [];
1033                 }
1034
1035                 $policy = explode( ',', $policy );
1036                 $policy = array_map( 'trim', $policy );
1037
1038                 $arr = [];
1039                 foreach ( $policy as $var ) {
1040                         if ( in_array( $var, [ 'index', 'noindex' ] ) ) {
1041                                 $arr['index'] = $var;
1042                         } elseif ( in_array( $var, [ 'follow', 'nofollow' ] ) ) {
1043                                 $arr['follow'] = $var;
1044                         }
1045                 }
1046
1047                 return $arr;
1048         }
1049
1050         /**
1051          * If this request is a redirect view, send "redirected from" subtitle to
1052          * the output. Returns true if the header was needed, false if this is not
1053          * a redirect view. Handles both local and remote redirects.
1054          *
1055          * @return bool
1056          */
1057         public function showRedirectedFromHeader() {
1058                 global $wgRedirectSources;
1059
1060                 $context = $this->getContext();
1061                 $outputPage = $context->getOutput();
1062                 $request = $context->getRequest();
1063                 $rdfrom = $request->getVal( 'rdfrom' );
1064
1065                 // Construct a URL for the current page view, but with the target title
1066                 $query = $request->getValues();
1067                 unset( $query['rdfrom'] );
1068                 unset( $query['title'] );
1069                 if ( $this->getTitle()->isRedirect() ) {
1070                         // Prevent double redirects
1071                         $query['redirect'] = 'no';
1072                 }
1073                 $redirectTargetUrl = $this->getTitle()->getLinkURL( $query );
1074
1075                 if ( isset( $this->mRedirectedFrom ) ) {
1076                         // Avoid PHP 7.1 warning of passing $this by reference
1077                         $articlePage = $this;
1078
1079                         // This is an internally redirected page view.
1080                         // We'll need a backlink to the source page for navigation.
1081                         if ( Hooks::run( 'ArticleViewRedirect', [ &$articlePage ] ) ) {
1082                                 $redir = Linker::linkKnown(
1083                                         $this->mRedirectedFrom,
1084                                         null,
1085                                         [],
1086                                         [ 'redirect' => 'no' ]
1087                                 );
1088
1089                                 $outputPage->addSubtitle( "<span class=\"mw-redirectedfrom\">" .
1090                                         $context->msg( 'redirectedfrom' )->rawParams( $redir )->parse()
1091                                 . "</span>" );
1092
1093                                 // Add the script to update the displayed URL and
1094                                 // set the fragment if one was specified in the redirect
1095                                 $outputPage->addJsConfigVars( [
1096                                         'wgInternalRedirectTargetUrl' => $redirectTargetUrl,
1097                                 ] );
1098                                 $outputPage->addModules( 'mediawiki.action.view.redirect' );
1099
1100                                 // Add a <link rel="canonical"> tag
1101                                 $outputPage->setCanonicalUrl( $this->getTitle()->getCanonicalURL() );
1102
1103                                 // Tell the output object that the user arrived at this article through a redirect
1104                                 $outputPage->setRedirectedFrom( $this->mRedirectedFrom );
1105
1106                                 return true;
1107                         }
1108                 } elseif ( $rdfrom ) {
1109                         // This is an externally redirected view, from some other wiki.
1110                         // If it was reported from a trusted site, supply a backlink.
1111                         if ( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
1112                                 $redir = Linker::makeExternalLink( $rdfrom, $rdfrom );
1113                                 $outputPage->addSubtitle( "<span class=\"mw-redirectedfrom\">" .
1114                                         $context->msg( 'redirectedfrom' )->rawParams( $redir )->parse()
1115                                 . "</span>" );
1116
1117                                 // Add the script to update the displayed URL
1118                                 $outputPage->addJsConfigVars( [
1119                                         'wgInternalRedirectTargetUrl' => $redirectTargetUrl,
1120                                 ] );
1121                                 $outputPage->addModules( 'mediawiki.action.view.redirect' );
1122
1123                                 return true;
1124                         }
1125                 }
1126
1127                 return false;
1128         }
1129
1130         /**
1131          * Show a header specific to the namespace currently being viewed, like
1132          * [[MediaWiki:Talkpagetext]]. For Article::view().
1133          */
1134         public function showNamespaceHeader() {
1135                 if ( $this->getTitle()->isTalkPage() ) {
1136                         if ( !wfMessage( 'talkpageheader' )->isDisabled() ) {
1137                                 $this->getContext()->getOutput()->wrapWikiMsg(
1138                                         "<div class=\"mw-talkpageheader\">\n$1\n</div>",
1139                                         [ 'talkpageheader' ]
1140                                 );
1141                         }
1142                 }
1143         }
1144
1145         /**
1146          * Show the footer section of an ordinary page view
1147          */
1148         public function showViewFooter() {
1149                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
1150                 if ( $this->getTitle()->getNamespace() == NS_USER_TALK
1151                         && IP::isValid( $this->getTitle()->getText() )
1152                 ) {
1153                         $this->getContext()->getOutput()->addWikiMsg( 'anontalkpagetext' );
1154                 }
1155
1156                 // Show a footer allowing the user to patrol the shown revision or page if possible
1157                 $patrolFooterShown = $this->showPatrolFooter();
1158
1159                 Hooks::run( 'ArticleViewFooter', [ $this, $patrolFooterShown ] );
1160         }
1161
1162         /**
1163          * If patrol is possible, output a patrol UI box. This is called from the
1164          * footer section of ordinary page views. If patrol is not possible or not
1165          * desired, does nothing.
1166          * Side effect: When the patrol link is build, this method will call
1167          * OutputPage::preventClickjacking() and load mediawiki.page.patrol.ajax.
1168          *
1169          * @return bool
1170          */
1171         public function showPatrolFooter() {
1172                 global $wgUseNPPatrol, $wgUseRCPatrol, $wgUseFilePatrol;
1173
1174                 // Allow hooks to decide whether to not output this at all
1175                 if ( !Hooks::run( 'ArticleShowPatrolFooter', [ $this ] ) ) {
1176                         return false;
1177                 }
1178
1179                 $outputPage = $this->getContext()->getOutput();
1180                 $user = $this->getContext()->getUser();
1181                 $title = $this->getTitle();
1182                 $rc = false;
1183
1184                 if ( !$title->quickUserCan( 'patrol', $user )
1185                         || !( $wgUseRCPatrol || $wgUseNPPatrol
1186                                 || ( $wgUseFilePatrol && $title->inNamespace( NS_FILE ) ) )
1187                 ) {
1188                         // Patrolling is disabled or the user isn't allowed to
1189                         return false;
1190                 }
1191
1192                 if ( $this->mRevision
1193                         && !RecentChange::isInRCLifespan( $this->mRevision->getTimestamp(), 21600 )
1194                 ) {
1195                         // The current revision is already older than what could be in the RC table
1196                         // 6h tolerance because the RC might not be cleaned out regularly
1197                         return false;
1198                 }
1199
1200                 // Check for cached results
1201                 $cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
1202                 $key = $cache->makeKey( 'unpatrollable-page', $title->getArticleID() );
1203                 if ( $cache->get( $key ) ) {
1204                         return false;
1205                 }
1206
1207                 $dbr = wfGetDB( DB_REPLICA );
1208                 $oldestRevisionTimestamp = $dbr->selectField(
1209                         'revision',
1210                         'MIN( rev_timestamp )',
1211                         [ 'rev_page' => $title->getArticleID() ],
1212                         __METHOD__
1213                 );
1214
1215                 // New page patrol: Get the timestamp of the oldest revison which
1216                 // the revision table holds for the given page. Then we look
1217                 // whether it's within the RC lifespan and if it is, we try
1218                 // to get the recentchanges row belonging to that entry
1219                 // (with rc_new = 1).
1220                 $recentPageCreation = false;
1221                 if ( $oldestRevisionTimestamp
1222                         && RecentChange::isInRCLifespan( $oldestRevisionTimestamp, 21600 )
1223                 ) {
1224                         // 6h tolerance because the RC might not be cleaned out regularly
1225                         $recentPageCreation = true;
1226                         $rc = RecentChange::newFromConds(
1227                                 [
1228                                         'rc_new' => 1,
1229                                         'rc_timestamp' => $oldestRevisionTimestamp,
1230                                         'rc_namespace' => $title->getNamespace(),
1231                                         'rc_cur_id' => $title->getArticleID()
1232                                 ],
1233                                 __METHOD__
1234                         );
1235                         if ( $rc ) {
1236                                 // Use generic patrol message for new pages
1237                                 $markPatrolledMsg = wfMessage( 'markaspatrolledtext' );
1238                         }
1239                 }
1240
1241                 // File patrol: Get the timestamp of the latest upload for this page,
1242                 // check whether it is within the RC lifespan and if it is, we try
1243                 // to get the recentchanges row belonging to that entry
1244                 // (with rc_type = RC_LOG, rc_log_type = upload).
1245                 $recentFileUpload = false;
1246                 if ( ( !$rc || $rc->getAttribute( 'rc_patrolled' ) ) && $wgUseFilePatrol
1247                         && $title->getNamespace() === NS_FILE ) {
1248                         // Retrieve timestamp of most recent upload
1249                         $newestUploadTimestamp = $dbr->selectField(
1250                                 'image',
1251                                 'MAX( img_timestamp )',
1252                                 [ 'img_name' => $title->getDBkey() ],
1253                                 __METHOD__
1254                         );
1255                         if ( $newestUploadTimestamp
1256                                 && RecentChange::isInRCLifespan( $newestUploadTimestamp, 21600 )
1257                         ) {
1258                                 // 6h tolerance because the RC might not be cleaned out regularly
1259                                 $recentFileUpload = true;
1260                                 $rc = RecentChange::newFromConds(
1261                                         [
1262                                                 'rc_type' => RC_LOG,
1263                                                 'rc_log_type' => 'upload',
1264                                                 'rc_timestamp' => $newestUploadTimestamp,
1265                                                 'rc_namespace' => NS_FILE,
1266                                                 'rc_cur_id' => $title->getArticleID()
1267                                         ],
1268                                         __METHOD__
1269                                 );
1270                                 if ( $rc ) {
1271                                         // Use patrol message specific to files
1272                                         $markPatrolledMsg = wfMessage( 'markaspatrolledtext-file' );
1273                                 }
1274                         }
1275                 }
1276
1277                 if ( !$recentPageCreation && !$recentFileUpload ) {
1278                         // Page creation and latest upload (for files) is too old to be in RC
1279
1280                         // We definitely can't patrol so cache the information
1281                         // When a new file version is uploaded, the cache is cleared
1282                         $cache->set( $key, '1' );
1283
1284                         return false;
1285                 }
1286
1287                 if ( !$rc ) {
1288                         // Don't cache: This can be hit if the page gets accessed very fast after
1289                         // its creation / latest upload or in case we have high replica DB lag. In case
1290                         // the revision is too old, we will already return above.
1291                         return false;
1292                 }
1293
1294                 if ( $rc->getAttribute( 'rc_patrolled' ) ) {
1295                         // Patrolled RC entry around
1296
1297                         // Cache the information we gathered above in case we can't patrol
1298                         // Don't cache in case we can patrol as this could change
1299                         $cache->set( $key, '1' );
1300
1301                         return false;
1302                 }
1303
1304                 if ( $rc->getPerformer()->equals( $user ) ) {
1305                         // Don't show a patrol link for own creations/uploads. If the user could
1306                         // patrol them, they already would be patrolled
1307                         return false;
1308                 }
1309
1310                 $outputPage->preventClickjacking();
1311                 if ( $user->isAllowed( 'writeapi' ) ) {
1312                         $outputPage->addModules( 'mediawiki.page.patrol.ajax' );
1313                 }
1314
1315                 $link = Linker::linkKnown(
1316                         $title,
1317                         $markPatrolledMsg->escaped(),
1318                         [],
1319                         [
1320                                 'action' => 'markpatrolled',
1321                                 'rcid' => $rc->getAttribute( 'rc_id' ),
1322                         ]
1323                 );
1324
1325                 $outputPage->addHTML(
1326                         "<div class='patrollink' data-mw='interface'>" .
1327                                 wfMessage( 'markaspatrolledlink' )->rawParams( $link )->escaped() .
1328                         '</div>'
1329                 );
1330
1331                 return true;
1332         }
1333
1334         /**
1335          * Purge the cache used to check if it is worth showing the patrol footer
1336          * For example, it is done during re-uploads when file patrol is used.
1337          * @param int $articleID ID of the article to purge
1338          * @since 1.27
1339          */
1340         public static function purgePatrolFooterCache( $articleID ) {
1341                 $cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
1342                 $cache->delete( $cache->makeKey( 'unpatrollable-page', $articleID ) );
1343         }
1344
1345         /**
1346          * Show the error text for a missing article. For articles in the MediaWiki
1347          * namespace, show the default message text. To be called from Article::view().
1348          */
1349         public function showMissingArticle() {
1350                 global $wgSend404Code;
1351
1352                 $outputPage = $this->getContext()->getOutput();
1353                 // Whether the page is a root user page of an existing user (but not a subpage)
1354                 $validUserPage = false;
1355
1356                 $title = $this->getTitle();
1357
1358                 # Show info in user (talk) namespace. Does the user exist? Is he blocked?
1359                 if ( $title->getNamespace() == NS_USER
1360                         || $title->getNamespace() == NS_USER_TALK
1361                 ) {
1362                         $rootPart = explode( '/', $title->getText() )[0];
1363                         $user = User::newFromName( $rootPart, false /* allow IP users */ );
1364                         $ip = User::isIP( $rootPart );
1365                         $block = Block::newFromTarget( $user, $user );
1366
1367                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
1368                                 $outputPage->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n\$1\n</div>",
1369                                         [ 'userpage-userdoesnotexist-view', wfEscapeWikiText( $rootPart ) ] );
1370                         } elseif (
1371                                 !is_null( $block ) &&
1372                                 $block->getType() != Block::TYPE_AUTO &&
1373                                 ( $block->isSitewide() || $user->isBlockedFrom( $title ) )
1374                         ) {
1375                                 // Show log extract if the user is sitewide blocked or is partially
1376                                 // blocked and not allowed to edit their user page or user talk page
1377                                 LogEventsList::showLogExtract(
1378                                         $outputPage,
1379                                         'block',
1380                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
1381                                         '',
1382                                         [
1383                                                 'lim' => 1,
1384                                                 'showIfEmpty' => false,
1385                                                 'msgKey' => [
1386                                                         'blocked-notice-logextract',
1387                                                         $user->getName() # Support GENDER in notice
1388                                                 ]
1389                                         ]
1390                                 );
1391                                 $validUserPage = !$title->isSubpage();
1392                         } else {
1393                                 $validUserPage = !$title->isSubpage();
1394                         }
1395                 }
1396
1397                 Hooks::run( 'ShowMissingArticle', [ $this ] );
1398
1399                 # Show delete and move logs if there were any such events.
1400                 # The logging query can DOS the site when bots/crawlers cause 404 floods,
1401                 # so be careful showing this. 404 pages must be cheap as they are hard to cache.
1402                 $cache = MediaWikiServices::getInstance()->getMainObjectStash();
1403                 $key = $cache->makeKey( 'page-recent-delete', md5( $title->getPrefixedText() ) );
1404                 $loggedIn = $this->getContext()->getUser()->isLoggedIn();
1405                 $sessionExists = $this->getContext()->getRequest()->getSession()->isPersistent();
1406                 if ( $loggedIn || $cache->get( $key ) || $sessionExists ) {
1407                         $logTypes = [ 'delete', 'move', 'protect' ];
1408
1409                         $dbr = wfGetDB( DB_REPLICA );
1410
1411                         $conds = [ 'log_action != ' . $dbr->addQuotes( 'revision' ) ];
1412                         // Give extensions a chance to hide their (unrelated) log entries
1413                         Hooks::run( 'Article::MissingArticleConditions', [ &$conds, $logTypes ] );
1414                         LogEventsList::showLogExtract(
1415                                 $outputPage,
1416                                 $logTypes,
1417                                 $title,
1418                                 '',
1419                                 [
1420                                         'lim' => 10,
1421                                         'conds' => $conds,
1422                                         'showIfEmpty' => false,
1423                                         'msgKey' => [ $loggedIn || $sessionExists
1424                                                 ? 'moveddeleted-notice'
1425                                                 : 'moveddeleted-notice-recent'
1426                                         ]
1427                                 ]
1428                         );
1429                 }
1430
1431                 if ( !$this->mPage->hasViewableContent() && $wgSend404Code && !$validUserPage ) {
1432                         // If there's no backing content, send a 404 Not Found
1433                         // for better machine handling of broken links.
1434                         $this->getContext()->getRequest()->response()->statusHeader( 404 );
1435                 }
1436
1437                 // Also apply the robot policy for nonexisting pages (even if a 404 was used for sanity)
1438                 $policy = $this->getRobotPolicy( 'view' );
1439                 $outputPage->setIndexPolicy( $policy['index'] );
1440                 $outputPage->setFollowPolicy( $policy['follow'] );
1441
1442                 $hookResult = Hooks::run( 'BeforeDisplayNoArticleText', [ $this ] );
1443
1444                 if ( !$hookResult ) {
1445                         return;
1446                 }
1447
1448                 # Show error message
1449                 $oldid = $this->getOldID();
1450                 if ( !$oldid && $title->getNamespace() === NS_MEDIAWIKI && $title->hasSourceText() ) {
1451                         // use fake Content object for system message
1452                         $parserOptions = ParserOptions::newCanonical( 'canonical' );
1453                         $outputPage->addParserOutput( $this->getEmptyPageParserOutput( $parserOptions ) );
1454                 } else {
1455                         if ( $oldid ) {
1456                                 $text = wfMessage( 'missing-revision', $oldid )->plain();
1457                         } elseif ( $title->quickUserCan( 'create', $this->getContext()->getUser() )
1458                                 && $title->quickUserCan( 'edit', $this->getContext()->getUser() )
1459                         ) {
1460                                 $message = $this->getContext()->getUser()->isLoggedIn() ? 'noarticletext' : 'noarticletextanon';
1461                                 $text = wfMessage( $message )->plain();
1462                         } else {
1463                                 $text = wfMessage( 'noarticletext-nopermission' )->plain();
1464                         }
1465
1466                         $dir = $this->getContext()->getLanguage()->getDir();
1467                         $lang = $this->getContext()->getLanguage()->getHtmlCode();
1468                         $outputPage->addWikiTextAsInterface( Xml::openElement( 'div', [
1469                                 'class' => "noarticletext mw-content-$dir",
1470                                 'dir' => $dir,
1471                                 'lang' => $lang,
1472                         ] ) . "\n$text\n</div>" );
1473                 }
1474         }
1475
1476         /**
1477          * If the revision requested for view is deleted, check permissions.
1478          * Send either an error message or a warning header to the output.
1479          *
1480          * @return bool True if the view is allowed, false if not.
1481          */
1482         public function showDeletedRevisionHeader() {
1483                 if ( !$this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1484                         // Not deleted
1485                         return true;
1486                 }
1487
1488                 $outputPage = $this->getContext()->getOutput();
1489                 $user = $this->getContext()->getUser();
1490                 // If the user is not allowed to see it...
1491                 if ( !$this->mRevision->userCan( Revision::DELETED_TEXT, $user ) ) {
1492                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1493                                 'rev-deleted-text-permission' );
1494
1495                         return false;
1496                 // If the user needs to confirm that they want to see it...
1497                 } elseif ( $this->getContext()->getRequest()->getInt( 'unhide' ) != 1 ) {
1498                         # Give explanation and add a link to view the revision...
1499                         $oldid = intval( $this->getOldID() );
1500                         $link = $this->getTitle()->getFullURL( "oldid={$oldid}&unhide=1" );
1501                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1502                                 'rev-suppressed-text-unhide' : 'rev-deleted-text-unhide';
1503                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1504                                 [ $msg, $link ] );
1505
1506                         return false;
1507                 // We are allowed to see...
1508                 } else {
1509                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1510                                 'rev-suppressed-text-view' : 'rev-deleted-text-view';
1511                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", $msg );
1512
1513                         return true;
1514                 }
1515         }
1516
1517         /**
1518          * Generate the navigation links when browsing through an article revisions
1519          * It shows the information as:
1520          *   Revision as of \<date\>; view current revision
1521          *   \<- Previous version | Next Version -\>
1522          *
1523          * @param int $oldid Revision ID of this article revision
1524          */
1525         public function setOldSubtitle( $oldid = 0 ) {
1526                 // Avoid PHP 7.1 warning of passing $this by reference
1527                 $articlePage = $this;
1528
1529                 if ( !Hooks::run( 'DisplayOldSubtitle', [ &$articlePage, &$oldid ] ) ) {
1530                         return;
1531                 }
1532
1533                 $context = $this->getContext();
1534                 $unhide = $context->getRequest()->getInt( 'unhide' ) == 1;
1535
1536                 # Cascade unhide param in links for easy deletion browsing
1537                 $extraParams = [];
1538                 if ( $unhide ) {
1539                         $extraParams['unhide'] = 1;
1540                 }
1541
1542                 if ( $this->mRevision && $this->mRevision->getId() === $oldid ) {
1543                         $revision = $this->mRevision;
1544                 } else {
1545                         $revision = Revision::newFromId( $oldid );
1546                 }
1547
1548                 $timestamp = $revision->getTimestamp();
1549
1550                 $current = ( $oldid == $this->mPage->getLatest() );
1551                 $language = $context->getLanguage();
1552                 $user = $context->getUser();
1553
1554                 $td = $language->userTimeAndDate( $timestamp, $user );
1555                 $tddate = $language->userDate( $timestamp, $user );
1556                 $tdtime = $language->userTime( $timestamp, $user );
1557
1558                 # Show user links if allowed to see them. If hidden, then show them only if requested...
1559                 $userlinks = Linker::revUserTools( $revision, !$unhide );
1560
1561                 $infomsg = $current && !$context->msg( 'revision-info-current' )->isDisabled()
1562                         ? 'revision-info-current'
1563                         : 'revision-info';
1564
1565                 $outputPage = $context->getOutput();
1566                 $revisionInfo = "<div id=\"mw-{$infomsg}\">" .
1567                         $context->msg( $infomsg, $td )
1568                                 ->rawParams( $userlinks )
1569                                 ->params( $revision->getId(), $tddate, $tdtime, $revision->getUserText() )
1570                                 ->rawParams( Linker::revComment( $revision, true, true ) )
1571                                 ->parse() .
1572                         "</div>";
1573
1574                 $lnk = $current
1575                         ? $context->msg( 'currentrevisionlink' )->escaped()
1576                         : Linker::linkKnown(
1577                                 $this->getTitle(),
1578                                 $context->msg( 'currentrevisionlink' )->escaped(),
1579                                 [],
1580                                 $extraParams
1581                         );
1582                 $curdiff = $current
1583                         ? $context->msg( 'diff' )->escaped()
1584                         : Linker::linkKnown(
1585                                 $this->getTitle(),
1586                                 $context->msg( 'diff' )->escaped(),
1587                                 [],
1588                                 [
1589                                         'diff' => 'cur',
1590                                         'oldid' => $oldid
1591                                 ] + $extraParams
1592                         );
1593                 $prev = $this->getTitle()->getPreviousRevisionID( $oldid );
1594                 $prevlink = $prev
1595                         ? Linker::linkKnown(
1596                                 $this->getTitle(),
1597                                 $context->msg( 'previousrevision' )->escaped(),
1598                                 [],
1599                                 [
1600                                         'direction' => 'prev',
1601                                         'oldid' => $oldid
1602                                 ] + $extraParams
1603                         )
1604                         : $context->msg( 'previousrevision' )->escaped();
1605                 $prevdiff = $prev
1606                         ? Linker::linkKnown(
1607                                 $this->getTitle(),
1608                                 $context->msg( 'diff' )->escaped(),
1609                                 [],
1610                                 [
1611                                         'diff' => 'prev',
1612                                         'oldid' => $oldid
1613                                 ] + $extraParams
1614                         )
1615                         : $context->msg( 'diff' )->escaped();
1616                 $nextlink = $current
1617                         ? $context->msg( 'nextrevision' )->escaped()
1618                         : Linker::linkKnown(
1619                                 $this->getTitle(),
1620                                 $context->msg( 'nextrevision' )->escaped(),
1621                                 [],
1622                                 [
1623                                         'direction' => 'next',
1624                                         'oldid' => $oldid
1625                                 ] + $extraParams
1626                         );
1627                 $nextdiff = $current
1628                         ? $context->msg( 'diff' )->escaped()
1629                         : Linker::linkKnown(
1630                                 $this->getTitle(),
1631                                 $context->msg( 'diff' )->escaped(),
1632                                 [],
1633                                 [
1634                                         'diff' => 'next',
1635                                         'oldid' => $oldid
1636                                 ] + $extraParams
1637                         );
1638
1639                 $cdel = Linker::getRevDeleteLink( $user, $revision, $this->getTitle() );
1640                 if ( $cdel !== '' ) {
1641                         $cdel .= ' ';
1642                 }
1643
1644                 // the outer div is need for styling the revision info and nav in MobileFrontend
1645                 $outputPage->addSubtitle( "<div class=\"mw-revision\">" . $revisionInfo .
1646                         "<div id=\"mw-revision-nav\">" . $cdel .
1647                         $context->msg( 'revision-nav' )->rawParams(
1648                                 $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff
1649                         )->escaped() . "</div></div>" );
1650         }
1651
1652         /**
1653          * Return the HTML for the top of a redirect page
1654          *
1655          * Chances are you should just be using the ParserOutput from
1656          * WikitextContent::getParserOutput instead of calling this for redirects.
1657          *
1658          * @param Title|array $target Destination(s) to redirect
1659          * @param bool $appendSubtitle [optional]
1660          * @param bool $forceKnown Should the image be shown as a bluelink regardless of existence?
1661          * @return string Containing HTML with redirect link
1662          *
1663          * @deprecated since 1.30
1664          */
1665         public function viewRedirect( $target, $appendSubtitle = true, $forceKnown = false ) {
1666                 $lang = $this->getTitle()->getPageLanguage();
1667                 $out = $this->getContext()->getOutput();
1668                 if ( $appendSubtitle ) {
1669                         $out->addSubtitle( wfMessage( 'redirectpagesub' ) );
1670                 }
1671                 $out->addModuleStyles( 'mediawiki.action.view.redirectPage' );
1672                 return static::getRedirectHeaderHtml( $lang, $target, $forceKnown );
1673         }
1674
1675         /**
1676          * Return the HTML for the top of a redirect page
1677          *
1678          * Chances are you should just be using the ParserOutput from
1679          * WikitextContent::getParserOutput instead of calling this for redirects.
1680          *
1681          * @since 1.23
1682          * @param Language $lang
1683          * @param Title|array $target Destination(s) to redirect
1684          * @param bool $forceKnown Should the image be shown as a bluelink regardless of existence?
1685          * @return string Containing HTML with redirect link
1686          */
1687         public static function getRedirectHeaderHtml( Language $lang, $target, $forceKnown = false ) {
1688                 if ( !is_array( $target ) ) {
1689                         $target = [ $target ];
1690                 }
1691
1692                 $html = '<ul class="redirectText">';
1693                 /** @var Title $title */
1694                 foreach ( $target as $title ) {
1695                         $html .= '<li>' . Linker::link(
1696                                 $title,
1697                                 htmlspecialchars( $title->getFullText() ),
1698                                 [],
1699                                 // Make sure wiki page redirects are not followed
1700                                 $title->isRedirect() ? [ 'redirect' => 'no' ] : [],
1701                                 ( $forceKnown ? [ 'known', 'noclasses' ] : [] )
1702                         ) . '</li>';
1703                 }
1704                 $html .= '</ul>';
1705
1706                 $redirectToText = wfMessage( 'redirectto' )->inLanguage( $lang )->escaped();
1707
1708                 return '<div class="redirectMsg">' .
1709                         '<p>' . $redirectToText . '</p>' .
1710                         $html .
1711                         '</div>';
1712         }
1713
1714         /**
1715          * Adds help link with an icon via page indicators.
1716          * Link target can be overridden by a local message containing a wikilink:
1717          * the message key is: 'namespace-' + namespace number + '-helppage'.
1718          * @param string $to Target MediaWiki.org page title or encoded URL.
1719          * @param bool $overrideBaseUrl Whether $url is a full URL, to avoid MW.o.
1720          * @since 1.25
1721          */
1722         public function addHelpLink( $to, $overrideBaseUrl = false ) {
1723                 $msg = wfMessage(
1724                         'namespace-' . $this->getTitle()->getNamespace() . '-helppage'
1725                 );
1726
1727                 $out = $this->getContext()->getOutput();
1728                 if ( !$msg->isDisabled() ) {
1729                         $helpUrl = Skin::makeUrl( $msg->plain() );
1730                         $out->addHelpLink( $helpUrl, true );
1731                 } else {
1732                         $out->addHelpLink( $to, $overrideBaseUrl );
1733                 }
1734         }
1735
1736         /**
1737          * Handle action=render
1738          */
1739         public function render() {
1740                 $this->getContext()->getRequest()->response()->header( 'X-Robots-Tag: noindex' );
1741                 $this->getContext()->getOutput()->setArticleBodyOnly( true );
1742                 // We later set 'enableSectionEditLinks=false' based on this; also used by ImagePage
1743                 $this->viewIsRenderAction = true;
1744                 $this->view();
1745         }
1746
1747         /**
1748          * action=protect handler
1749          */
1750         public function protect() {
1751                 $form = new ProtectionForm( $this );
1752                 $form->execute();
1753         }
1754
1755         /**
1756          * action=unprotect handler (alias)
1757          */
1758         public function unprotect() {
1759                 $this->protect();
1760         }
1761
1762         /**
1763          * UI entry point for page deletion
1764          */
1765         public function delete() {
1766                 # This code desperately needs to be totally rewritten
1767
1768                 $title = $this->getTitle();
1769                 $context = $this->getContext();
1770                 $user = $context->getUser();
1771                 $request = $context->getRequest();
1772
1773                 # Check permissions
1774                 $permissionErrors = $title->getUserPermissionsErrors( 'delete', $user );
1775                 if ( count( $permissionErrors ) ) {
1776                         throw new PermissionsError( 'delete', $permissionErrors );
1777                 }
1778
1779                 # Read-only check...
1780                 if ( wfReadOnly() ) {
1781                         throw new ReadOnlyError;
1782                 }
1783
1784                 # Better double-check that it hasn't been deleted yet!
1785                 $this->mPage->loadPageData(
1786                         $request->wasPosted() ? WikiPage::READ_LATEST : WikiPage::READ_NORMAL
1787                 );
1788                 if ( !$this->mPage->exists() ) {
1789                         $deleteLogPage = new LogPage( 'delete' );
1790                         $outputPage = $context->getOutput();
1791                         $outputPage->setPageTitle( $context->msg( 'cannotdelete-title', $title->getPrefixedText() ) );
1792                         $outputPage->wrapWikiMsg( "<div class=\"error mw-error-cannotdelete\">\n$1\n</div>",
1793                                         [ 'cannotdelete', wfEscapeWikiText( $title->getPrefixedText() ) ]
1794                                 );
1795                         $outputPage->addHTML(
1796                                 Xml::element( 'h2', null, $deleteLogPage->getName()->text() )
1797                         );
1798                         LogEventsList::showLogExtract(
1799                                 $outputPage,
1800                                 'delete',
1801                                 $title
1802                         );
1803
1804                         return;
1805                 }
1806
1807                 $deleteReasonList = $request->getText( 'wpDeleteReasonList', 'other' );
1808                 $deleteReason = $request->getText( 'wpReason' );
1809
1810                 if ( $deleteReasonList == 'other' ) {
1811                         $reason = $deleteReason;
1812                 } elseif ( $deleteReason != '' ) {
1813                         // Entry from drop down menu + additional comment
1814                         $colonseparator = wfMessage( 'colon-separator' )->inContentLanguage()->text();
1815                         $reason = $deleteReasonList . $colonseparator . $deleteReason;
1816                 } else {
1817                         $reason = $deleteReasonList;
1818                 }
1819
1820                 if ( $request->wasPosted() && $user->matchEditToken( $request->getVal( 'wpEditToken' ),
1821                         [ 'delete', $this->getTitle()->getPrefixedText() ] )
1822                 ) {
1823                         # Flag to hide all contents of the archived revisions
1824                         $suppress = $request->getCheck( 'wpSuppress' ) && $user->isAllowed( 'suppressrevision' );
1825
1826                         $this->doDelete( $reason, $suppress );
1827
1828                         WatchAction::doWatchOrUnwatch( $request->getCheck( 'wpWatch' ), $title, $user );
1829
1830                         return;
1831                 }
1832
1833                 // Generate deletion reason
1834                 $hasHistory = false;
1835                 if ( !$reason ) {
1836                         try {
1837                                 $reason = $this->generateReason( $hasHistory );
1838                         } catch ( Exception $e ) {
1839                                 # if a page is horribly broken, we still want to be able to
1840                                 # delete it. So be lenient about errors here.
1841                                 wfDebug( "Error while building auto delete summary: $e" );
1842                                 $reason = '';
1843                         }
1844                 }
1845
1846                 // If the page has a history, insert a warning
1847                 if ( $hasHistory ) {
1848                         $title = $this->getTitle();
1849
1850                         // The following can use the real revision count as this is only being shown for users
1851                         // that can delete this page.
1852                         // This, as a side-effect, also makes sure that the following query isn't being run for
1853                         // pages with a larger history, unless the user has the 'bigdelete' right
1854                         // (and is about to delete this page).
1855                         $dbr = wfGetDB( DB_REPLICA );
1856                         $revisions = $edits = (int)$dbr->selectField(
1857                                 'revision',
1858                                 'COUNT(rev_page)',
1859                                 [ 'rev_page' => $title->getArticleID() ],
1860                                 __METHOD__
1861                         );
1862
1863                         // @todo i18n issue/patchwork message
1864                         $context->getOutput()->addHTML(
1865                                 '<strong class="mw-delete-warning-revisions">' .
1866                                 $context->msg( 'historywarning' )->numParams( $revisions )->parse() .
1867                                 $context->msg( 'word-separator' )->escaped() . Linker::linkKnown( $title,
1868                                         $context->msg( 'history' )->escaped(),
1869                                         [],
1870                                         [ 'action' => 'history' ] ) .
1871                                 '</strong>'
1872                         );
1873
1874                         if ( $title->isBigDeletion() ) {
1875                                 global $wgDeleteRevisionsLimit;
1876                                 $context->getOutput()->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
1877                                         [
1878                                                 'delete-warning-toobig',
1879                                                 $context->getLanguage()->formatNum( $wgDeleteRevisionsLimit )
1880                                         ]
1881                                 );
1882                         }
1883                 }
1884
1885                 $this->confirmDelete( $reason );
1886         }
1887
1888         /**
1889          * Output deletion confirmation dialog
1890          * @todo Move to another file?
1891          * @param string $reason Prefilled reason
1892          */
1893         public function confirmDelete( $reason ) {
1894                 wfDebug( "Article::confirmDelete\n" );
1895
1896                 $title = $this->getTitle();
1897                 $ctx = $this->getContext();
1898                 $outputPage = $ctx->getOutput();
1899                 $outputPage->setPageTitle( wfMessage( 'delete-confirm', $title->getPrefixedText() ) );
1900                 $outputPage->addBacklinkSubtitle( $title );
1901                 $outputPage->setRobotPolicy( 'noindex,nofollow' );
1902                 $outputPage->addModules( 'mediawiki.action.delete' );
1903
1904                 $backlinkCache = $title->getBacklinkCache();
1905                 if ( $backlinkCache->hasLinks( 'pagelinks' ) || $backlinkCache->hasLinks( 'templatelinks' ) ) {
1906                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1907                                 'deleting-backlinks-warning' );
1908                 }
1909
1910                 $subpageQueryLimit = 51;
1911                 $subpages = $title->getSubpages( $subpageQueryLimit );
1912                 $subpageCount = count( $subpages );
1913                 if ( $subpageCount > 0 ) {
1914                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1915                                 [ 'deleting-subpages-warning', Message::numParam( $subpageCount ) ] );
1916                 }
1917                 $outputPage->addWikiMsg( 'confirmdeletetext' );
1918
1919                 Hooks::run( 'ArticleConfirmDelete', [ $this, $outputPage, &$reason ] );
1920
1921                 $user = $this->getContext()->getUser();
1922                 $checkWatch = $user->getBoolOption( 'watchdeletion' ) || $user->isWatched( $title );
1923
1924                 $outputPage->enableOOUI();
1925
1926                 $options = Xml::listDropDownOptions(
1927                         $ctx->msg( 'deletereason-dropdown' )->inContentLanguage()->text(),
1928                         [ 'other' => $ctx->msg( 'deletereasonotherlist' )->inContentLanguage()->text() ]
1929                 );
1930                 $options = Xml::listDropDownOptionsOoui( $options );
1931
1932                 $fields[] = new OOUI\FieldLayout(
1933                         new OOUI\DropdownInputWidget( [
1934                                 'name' => 'wpDeleteReasonList',
1935                                 'inputId' => 'wpDeleteReasonList',
1936                                 'tabIndex' => 1,
1937                                 'infusable' => true,
1938                                 'value' => '',
1939                                 'options' => $options
1940                         ] ),
1941                         [
1942                                 'label' => $ctx->msg( 'deletecomment' )->text(),
1943                                 'align' => 'top',
1944                         ]
1945                 );
1946
1947                 // HTML maxlength uses "UTF-16 code units", which means that characters outside BMP
1948                 // (e.g. emojis) count for two each. This limit is overridden in JS to instead count
1949                 // Unicode codepoints (or 255 UTF-8 bytes for old schema).
1950                 $conf = $this->getContext()->getConfig();
1951                 $oldCommentSchema = $conf->get( 'CommentTableSchemaMigrationStage' ) === MIGRATION_OLD;
1952                 $fields[] = new OOUI\FieldLayout(
1953                         new OOUI\TextInputWidget( [
1954                                 'name' => 'wpReason',
1955                                 'inputId' => 'wpReason',
1956                                 'tabIndex' => 2,
1957                                 'maxLength' => $oldCommentSchema ? 255 : CommentStore::COMMENT_CHARACTER_LIMIT,
1958                                 'infusable' => true,
1959                                 'value' => $reason,
1960                                 'autofocus' => true,
1961                         ] ),
1962                         [
1963                                 'label' => $ctx->msg( 'deleteotherreason' )->text(),
1964                                 'align' => 'top',
1965                         ]
1966                 );
1967
1968                 if ( $user->isLoggedIn() ) {
1969                         $fields[] = new OOUI\FieldLayout(
1970                                 new OOUI\CheckboxInputWidget( [
1971                                         'name' => 'wpWatch',
1972                                         'inputId' => 'wpWatch',
1973                                         'tabIndex' => 3,
1974                                         'selected' => $checkWatch,
1975                                 ] ),
1976                                 [
1977                                         'label' => $ctx->msg( 'watchthis' )->text(),
1978                                         'align' => 'inline',
1979                                         'infusable' => true,
1980                                 ]
1981                         );
1982                 }
1983
1984                 if ( $user->isAllowed( 'suppressrevision' ) ) {
1985                         $fields[] = new OOUI\FieldLayout(
1986                                 new OOUI\CheckboxInputWidget( [
1987                                         'name' => 'wpSuppress',
1988                                         'inputId' => 'wpSuppress',
1989                                         'tabIndex' => 4,
1990                                 ] ),
1991                                 [
1992                                         'label' => $ctx->msg( 'revdelete-suppress' )->text(),
1993                                         'align' => 'inline',
1994                                         'infusable' => true,
1995                                 ]
1996                         );
1997                 }
1998
1999                 $fields[] = new OOUI\FieldLayout(
2000                         new OOUI\ButtonInputWidget( [
2001                                 'name' => 'wpConfirmB',
2002                                 'inputId' => 'wpConfirmB',
2003                                 'tabIndex' => 5,
2004                                 'value' => $ctx->msg( 'deletepage' )->text(),
2005                                 'label' => $ctx->msg( 'deletepage' )->text(),
2006                                 'flags' => [ 'primary', 'destructive' ],
2007                                 'type' => 'submit',
2008                         ] ),
2009                         [
2010                                 'align' => 'top',
2011                         ]
2012                 );
2013
2014                 $fieldset = new OOUI\FieldsetLayout( [
2015                         'label' => $ctx->msg( 'delete-legend' )->text(),
2016                         'id' => 'mw-delete-table',
2017                         'items' => $fields,
2018                 ] );
2019
2020                 $form = new OOUI\FormLayout( [
2021                         'method' => 'post',
2022                         'action' => $title->getLocalURL( 'action=delete' ),
2023                         'id' => 'deleteconfirm',
2024                 ] );
2025                 $form->appendContent(
2026                         $fieldset,
2027                         new OOUI\HtmlSnippet(
2028                                 Html::hidden( 'wpEditToken', $user->getEditToken( [ 'delete', $title->getPrefixedText() ] ) )
2029                         )
2030                 );
2031
2032                 $outputPage->addHTML(
2033                         new OOUI\PanelLayout( [
2034                                 'classes' => [ 'deletepage-wrapper' ],
2035                                 'expanded' => false,
2036                                 'padded' => true,
2037                                 'framed' => true,
2038                                 'content' => $form,
2039                         ] )
2040                 );
2041
2042                 if ( $user->isAllowed( 'editinterface' ) ) {
2043                         $link = Linker::linkKnown(
2044                                 $ctx->msg( 'deletereason-dropdown' )->inContentLanguage()->getTitle(),
2045                                 wfMessage( 'delete-edit-reasonlist' )->escaped(),
2046                                 [],
2047                                 [ 'action' => 'edit' ]
2048                         );
2049                         $outputPage->addHTML( '<p class="mw-delete-editreasons">' . $link . '</p>' );
2050                 }
2051
2052                 $deleteLogPage = new LogPage( 'delete' );
2053                 $outputPage->addHTML( Xml::element( 'h2', null, $deleteLogPage->getName()->text() ) );
2054                 LogEventsList::showLogExtract( $outputPage, 'delete', $title );
2055         }
2056
2057         /**
2058          * Perform a deletion and output success or failure messages
2059          * @param string $reason
2060          * @param bool $suppress
2061          * @param bool $immediate false allows deleting over time via the job queue
2062          * @throws FatalError
2063          * @throws MWException
2064          */
2065         public function doDelete( $reason, $suppress = false, $immediate = false ) {
2066                 $error = '';
2067                 $context = $this->getContext();
2068                 $outputPage = $context->getOutput();
2069                 $user = $context->getUser();
2070                 $status = $this->mPage->doDeleteArticleReal( $reason, $suppress, 0, true, $error, $user,
2071                         [], 'delete', $immediate );
2072
2073                 if ( $status->isOK() ) {
2074                         $deleted = $this->getTitle()->getPrefixedText();
2075
2076                         $outputPage->setPageTitle( wfMessage( 'actioncomplete' ) );
2077                         $outputPage->setRobotPolicy( 'noindex,nofollow' );
2078
2079                         if ( $status->isGood() ) {
2080                                 $loglink = '[[Special:Log/delete|' . wfMessage( 'deletionlog' )->text() . ']]';
2081                                 $outputPage->addWikiMsg( 'deletedtext', wfEscapeWikiText( $deleted ), $loglink );
2082                                 Hooks::run( 'ArticleDeleteAfterSuccess', [ $this->getTitle(), $outputPage ] );
2083                         } else {
2084                                 $outputPage->addWikiMsg( 'delete-scheduled', wfEscapeWikiText( $deleted ) );
2085                         }
2086
2087                         $outputPage->returnToMain( false );
2088                 } else {
2089                         $outputPage->setPageTitle(
2090                                 wfMessage( 'cannotdelete-title',
2091                                         $this->getTitle()->getPrefixedText() )
2092                         );
2093
2094                         if ( $error == '' ) {
2095                                 $outputPage->wrapWikiTextAsInterface(
2096                                         'error mw-error-cannotdelete',
2097                                         $status->getWikiText()
2098                                 );
2099                                 $deleteLogPage = new LogPage( 'delete' );
2100                                 $outputPage->addHTML( Xml::element( 'h2', null, $deleteLogPage->getName()->text() ) );
2101
2102                                 LogEventsList::showLogExtract(
2103                                         $outputPage,
2104                                         'delete',
2105                                         $this->getTitle()
2106                                 );
2107                         } else {
2108                                 $outputPage->addHTML( $error );
2109                         }
2110                 }
2111         }
2112
2113         /* Caching functions */
2114
2115         /**
2116          * checkLastModified returns true if it has taken care of all
2117          * output to the client that is necessary for this request.
2118          * (that is, it has sent a cached version of the page)
2119          *
2120          * @return bool True if cached version send, false otherwise
2121          */
2122         protected function tryFileCache() {
2123                 static $called = false;
2124
2125                 if ( $called ) {
2126                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
2127                         return false;
2128                 }
2129
2130                 $called = true;
2131                 if ( $this->isFileCacheable() ) {
2132                         $cache = new HTMLFileCache( $this->getTitle(), 'view' );
2133                         if ( $cache->isCacheGood( $this->mPage->getTouched() ) ) {
2134                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
2135                                 $cache->loadFromFileCache( $this->getContext() );
2136                                 return true;
2137                         } else {
2138                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
2139                                 ob_start( [ &$cache, 'saveToFileCache' ] );
2140                         }
2141                 } else {
2142                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
2143                 }
2144
2145                 return false;
2146         }
2147
2148         /**
2149          * Check if the page can be cached
2150          * @param int $mode One of the HTMLFileCache::MODE_* constants (since 1.28)
2151          * @return bool
2152          */
2153         public function isFileCacheable( $mode = HTMLFileCache::MODE_NORMAL ) {
2154                 $cacheable = false;
2155
2156                 if ( HTMLFileCache::useFileCache( $this->getContext(), $mode ) ) {
2157                         $cacheable = $this->mPage->getId()
2158                                 && !$this->mRedirectedFrom && !$this->getTitle()->isRedirect();
2159                         // Extension may have reason to disable file caching on some pages.
2160                         if ( $cacheable ) {
2161                                 // Avoid PHP 7.1 warning of passing $this by reference
2162                                 $articlePage = $this;
2163                                 $cacheable = Hooks::run( 'IsFileCacheable', [ &$articlePage ] );
2164                         }
2165                 }
2166
2167                 return $cacheable;
2168         }
2169
2170         /**#@-*/
2171
2172         /**
2173          * Lightweight method to get the parser output for a page, checking the parser cache
2174          * and so on. Doesn't consider most of the stuff that Article::view() is forced to
2175          * consider, so it's not appropriate to use there.
2176          *
2177          * @since 1.16 (r52326) for LiquidThreads
2178          *
2179          * @param int|null $oldid Revision ID or null
2180          * @param User|null $user The relevant user
2181          * @return ParserOutput|bool ParserOutput or false if the given revision ID is not found
2182          */
2183         public function getParserOutput( $oldid = null, User $user = null ) {
2184                 // XXX: bypasses mParserOptions and thus setParserOptions()
2185
2186                 if ( $user === null ) {
2187                         $parserOptions = $this->getParserOptions();
2188                 } else {
2189                         $parserOptions = $this->mPage->makeParserOptions( $user );
2190                 }
2191
2192                 return $this->mPage->getParserOutput( $parserOptions, $oldid );
2193         }
2194
2195         /**
2196          * Override the ParserOptions used to render the primary article wikitext.
2197          *
2198          * @param ParserOptions $options
2199          * @throws MWException If the parser options where already initialized.
2200          */
2201         public function setParserOptions( ParserOptions $options ) {
2202                 if ( $this->mParserOptions ) {
2203                         throw new MWException( "can't change parser options after they have already been set" );
2204                 }
2205
2206                 // clone, so if $options is modified later, it doesn't confuse the parser cache.
2207                 $this->mParserOptions = clone $options;
2208         }
2209
2210         /**
2211          * Get parser options suitable for rendering the primary article wikitext
2212          * @return ParserOptions
2213          */
2214         public function getParserOptions() {
2215                 if ( !$this->mParserOptions ) {
2216                         $this->mParserOptions = $this->mPage->makeParserOptions( $this->getContext() );
2217                 }
2218                 // Clone to allow modifications of the return value without affecting cache
2219                 return clone $this->mParserOptions;
2220         }
2221
2222         /**
2223          * Sets the context this Article is executed in
2224          *
2225          * @param IContextSource $context
2226          * @since 1.18
2227          */
2228         public function setContext( $context ) {
2229                 $this->mContext = $context;
2230         }
2231
2232         /**
2233          * Gets the context this Article is executed in
2234          *
2235          * @return IContextSource
2236          * @since 1.18
2237          */
2238         public function getContext() {
2239                 if ( $this->mContext instanceof IContextSource ) {
2240                         return $this->mContext;
2241                 } else {
2242                         wfDebug( __METHOD__ . " called and \$mContext is null. " .
2243                                 "Return RequestContext::getMain(); for sanity\n" );
2244                         return RequestContext::getMain();
2245                 }
2246         }
2247
2248         /**
2249          * Use PHP's magic __get handler to handle accessing of
2250          * raw WikiPage fields for backwards compatibility.
2251          *
2252          * @param string $fname Field name
2253          * @return mixed
2254          */
2255         public function __get( $fname ) {
2256                 if ( property_exists( $this->mPage, $fname ) ) {
2257                         # wfWarn( "Access to raw $fname field " . __CLASS__ );
2258                         return $this->mPage->$fname;
2259                 }
2260                 trigger_error( 'Inaccessible property via __get(): ' . $fname, E_USER_NOTICE );
2261         }
2262
2263         /**
2264          * Use PHP's magic __set handler to handle setting of
2265          * raw WikiPage fields for backwards compatibility.
2266          *
2267          * @param string $fname Field name
2268          * @param mixed $fvalue New value
2269          */
2270         public function __set( $fname, $fvalue ) {
2271                 if ( property_exists( $this->mPage, $fname ) ) {
2272                         # wfWarn( "Access to raw $fname field of " . __CLASS__ );
2273                         $this->mPage->$fname = $fvalue;
2274                 // Note: extensions may want to toss on new fields
2275                 } elseif ( !in_array( $fname, [ 'mContext', 'mPage' ] ) ) {
2276                         $this->mPage->$fname = $fvalue;
2277                 } else {
2278                         trigger_error( 'Inaccessible property via __set(): ' . $fname, E_USER_NOTICE );
2279                 }
2280         }
2281
2282         /**
2283          * Call to WikiPage function for backwards compatibility.
2284          * @see WikiPage::checkFlags
2285          */
2286         public function checkFlags( $flags ) {
2287                 return $this->mPage->checkFlags( $flags );
2288         }
2289
2290         /**
2291          * Call to WikiPage function for backwards compatibility.
2292          * @see WikiPage::checkTouched
2293          */
2294         public function checkTouched() {
2295                 return $this->mPage->checkTouched();
2296         }
2297
2298         /**
2299          * Call to WikiPage function for backwards compatibility.
2300          * @see WikiPage::clearPreparedEdit
2301          */
2302         public function clearPreparedEdit() {
2303                 $this->mPage->clearPreparedEdit();
2304         }
2305
2306         /**
2307          * Call to WikiPage function for backwards compatibility.
2308          * @see WikiPage::doDeleteArticleReal
2309          */
2310         public function doDeleteArticleReal(
2311                 $reason, $suppress = false, $u1 = null, $u2 = null, &$error = '', User $user = null,
2312                 $tags = [], $immediate = false
2313         ) {
2314                 return $this->mPage->doDeleteArticleReal(
2315                         $reason, $suppress, $u1, $u2, $error, $user, $tags, 'delete', $immediate
2316                 );
2317         }
2318
2319         /**
2320          * Call to WikiPage function for backwards compatibility.
2321          * @see WikiPage::doDeleteUpdates
2322          */
2323         public function doDeleteUpdates(
2324                 $id,
2325                 Content $content = null,
2326                 $revision = null,
2327                 User $user = null
2328         ) {
2329                 $this->mPage->doDeleteUpdates( $id, $content, $revision, $user );
2330         }
2331
2332         /**
2333          * Call to WikiPage function for backwards compatibility.
2334          * @deprecated since 1.29. Use WikiPage::doEditContent() directly instead
2335          * @see WikiPage::doEditContent
2336          */
2337         public function doEditContent( Content $content, $summary, $flags = 0, $originalRevId = false,
2338                 User $user = null, $serialFormat = null
2339         ) {
2340                 wfDeprecated( __METHOD__, '1.29' );
2341                 return $this->mPage->doEditContent( $content, $summary, $flags, $originalRevId,
2342                         $user, $serialFormat
2343                 );
2344         }
2345
2346         /**
2347          * Call to WikiPage function for backwards compatibility.
2348          * @see WikiPage::doEditUpdates
2349          */
2350         public function doEditUpdates( Revision $revision, User $user, array $options = [] ) {
2351                 return $this->mPage->doEditUpdates( $revision, $user, $options );
2352         }
2353
2354         /**
2355          * Call to WikiPage function for backwards compatibility.
2356          * @see WikiPage::doPurge
2357          * @note In 1.28 (and only 1.28), this took a $flags parameter that
2358          *  controlled how much purging was done.
2359          */
2360         public function doPurge() {
2361                 return $this->mPage->doPurge();
2362         }
2363
2364         /**
2365          * Call to WikiPage function for backwards compatibility.
2366          * @see WikiPage::doViewUpdates
2367          */
2368         public function doViewUpdates( User $user, $oldid = 0 ) {
2369                 $this->mPage->doViewUpdates( $user, $oldid );
2370         }
2371
2372         /**
2373          * Call to WikiPage function for backwards compatibility.
2374          * @see WikiPage::exists
2375          */
2376         public function exists() {
2377                 return $this->mPage->exists();
2378         }
2379
2380         /**
2381          * Call to WikiPage function for backwards compatibility.
2382          * @see WikiPage::followRedirect
2383          */
2384         public function followRedirect() {
2385                 return $this->mPage->followRedirect();
2386         }
2387
2388         /**
2389          * Call to WikiPage function for backwards compatibility.
2390          * @see ContentHandler::getActionOverrides
2391          */
2392         public function getActionOverrides() {
2393                 return $this->mPage->getActionOverrides();
2394         }
2395
2396         /**
2397          * Call to WikiPage function for backwards compatibility.
2398          * @see WikiPage::getAutoDeleteReason
2399          */
2400         public function getAutoDeleteReason( &$hasHistory ) {
2401                 return $this->mPage->getAutoDeleteReason( $hasHistory );
2402         }
2403
2404         /**
2405          * Call to WikiPage function for backwards compatibility.
2406          * @see WikiPage::getCategories
2407          */
2408         public function getCategories() {
2409                 return $this->mPage->getCategories();
2410         }
2411
2412         /**
2413          * Call to WikiPage function for backwards compatibility.
2414          * @see WikiPage::getComment
2415          */
2416         public function getComment( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2417                 return $this->mPage->getComment( $audience, $user );
2418         }
2419
2420         /**
2421          * Call to WikiPage function for backwards compatibility.
2422          * @see WikiPage::getContentHandler
2423          */
2424         public function getContentHandler() {
2425                 return $this->mPage->getContentHandler();
2426         }
2427
2428         /**
2429          * Call to WikiPage function for backwards compatibility.
2430          * @see WikiPage::getContentModel
2431          */
2432         public function getContentModel() {
2433                 return $this->mPage->getContentModel();
2434         }
2435
2436         /**
2437          * Call to WikiPage function for backwards compatibility.
2438          * @see WikiPage::getContributors
2439          */
2440         public function getContributors() {
2441                 return $this->mPage->getContributors();
2442         }
2443
2444         /**
2445          * Call to WikiPage function for backwards compatibility.
2446          * @see WikiPage::getCreator
2447          */
2448         public function getCreator( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2449                 return $this->mPage->getCreator( $audience, $user );
2450         }
2451
2452         /**
2453          * Call to WikiPage function for backwards compatibility.
2454          * @see WikiPage::getDeletionUpdates
2455          */
2456         public function getDeletionUpdates( Content $content = null ) {
2457                 return $this->mPage->getDeletionUpdates( $content );
2458         }
2459
2460         /**
2461          * Call to WikiPage function for backwards compatibility.
2462          * @see WikiPage::getHiddenCategories
2463          */
2464         public function getHiddenCategories() {
2465                 return $this->mPage->getHiddenCategories();
2466         }
2467
2468         /**
2469          * Call to WikiPage function for backwards compatibility.
2470          * @see WikiPage::getId
2471          */
2472         public function getId() {
2473                 return $this->mPage->getId();
2474         }
2475
2476         /**
2477          * Call to WikiPage function for backwards compatibility.
2478          * @see WikiPage::getLatest
2479          */
2480         public function getLatest() {
2481                 return $this->mPage->getLatest();
2482         }
2483
2484         /**
2485          * Call to WikiPage function for backwards compatibility.
2486          * @see WikiPage::getLinksTimestamp
2487          */
2488         public function getLinksTimestamp() {
2489                 return $this->mPage->getLinksTimestamp();
2490         }
2491
2492         /**
2493          * Call to WikiPage function for backwards compatibility.
2494          * @see WikiPage::getMinorEdit
2495          */
2496         public function getMinorEdit() {
2497                 return $this->mPage->getMinorEdit();
2498         }
2499
2500         /**
2501          * Call to WikiPage function for backwards compatibility.
2502          * @see WikiPage::getOldestRevision
2503          */
2504         public function getOldestRevision() {
2505                 return $this->mPage->getOldestRevision();
2506         }
2507
2508         /**
2509          * Call to WikiPage function for backwards compatibility.
2510          * @see WikiPage::getRedirectTarget
2511          */
2512         public function getRedirectTarget() {
2513                 return $this->mPage->getRedirectTarget();
2514         }
2515
2516         /**
2517          * Call to WikiPage function for backwards compatibility.
2518          * @see WikiPage::getRedirectURL
2519          */
2520         public function getRedirectURL( $rt ) {
2521                 return $this->mPage->getRedirectURL( $rt );
2522         }
2523
2524         /**
2525          * Call to WikiPage function for backwards compatibility.
2526          * @see WikiPage::getRevision
2527          */
2528         public function getRevision() {
2529                 return $this->mPage->getRevision();
2530         }
2531
2532         /**
2533          * Call to WikiPage function for backwards compatibility.
2534          * @see WikiPage::getTimestamp
2535          */
2536         public function getTimestamp() {
2537                 return $this->mPage->getTimestamp();
2538         }
2539
2540         /**
2541          * Call to WikiPage function for backwards compatibility.
2542          * @see WikiPage::getTouched
2543          */
2544         public function getTouched() {
2545                 return $this->mPage->getTouched();
2546         }
2547
2548         /**
2549          * Call to WikiPage function for backwards compatibility.
2550          * @see WikiPage::getUndoContent
2551          */
2552         public function getUndoContent( Revision $undo, Revision $undoafter = null ) {
2553                 return $this->mPage->getUndoContent( $undo, $undoafter );
2554         }
2555
2556         /**
2557          * Call to WikiPage function for backwards compatibility.
2558          * @see WikiPage::getUser
2559          */
2560         public function getUser( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2561                 return $this->mPage->getUser( $audience, $user );
2562         }
2563
2564         /**
2565          * Call to WikiPage function for backwards compatibility.
2566          * @see WikiPage::getUserText
2567          */
2568         public function getUserText( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2569                 return $this->mPage->getUserText( $audience, $user );
2570         }
2571
2572         /**
2573          * Call to WikiPage function for backwards compatibility.
2574          * @see WikiPage::hasViewableContent
2575          */
2576         public function hasViewableContent() {
2577                 return $this->mPage->hasViewableContent();
2578         }
2579
2580         /**
2581          * Call to WikiPage function for backwards compatibility.
2582          * @see WikiPage::insertOn
2583          */
2584         public function insertOn( $dbw, $pageId = null ) {
2585                 return $this->mPage->insertOn( $dbw, $pageId );
2586         }
2587
2588         /**
2589          * Call to WikiPage function for backwards compatibility.
2590          * @see WikiPage::insertProtectNullRevision
2591          */
2592         public function insertProtectNullRevision( $revCommentMsg, array $limit,
2593                 array $expiry, $cascade, $reason, $user = null
2594         ) {
2595                 return $this->mPage->insertProtectNullRevision( $revCommentMsg, $limit,
2596                         $expiry, $cascade, $reason, $user
2597                 );
2598         }
2599
2600         /**
2601          * Call to WikiPage function for backwards compatibility.
2602          * @see WikiPage::insertRedirect
2603          */
2604         public function insertRedirect() {
2605                 return $this->mPage->insertRedirect();
2606         }
2607
2608         /**
2609          * Call to WikiPage function for backwards compatibility.
2610          * @see WikiPage::insertRedirectEntry
2611          */
2612         public function insertRedirectEntry( Title $rt, $oldLatest = null ) {
2613                 return $this->mPage->insertRedirectEntry( $rt, $oldLatest );
2614         }
2615
2616         /**
2617          * Call to WikiPage function for backwards compatibility.
2618          * @see WikiPage::isCountable
2619          */
2620         public function isCountable( $editInfo = false ) {
2621                 return $this->mPage->isCountable( $editInfo );
2622         }
2623
2624         /**
2625          * Call to WikiPage function for backwards compatibility.
2626          * @see WikiPage::isRedirect
2627          */
2628         public function isRedirect() {
2629                 return $this->mPage->isRedirect();
2630         }
2631
2632         /**
2633          * Call to WikiPage function for backwards compatibility.
2634          * @see WikiPage::loadFromRow
2635          */
2636         public function loadFromRow( $data, $from ) {
2637                 return $this->mPage->loadFromRow( $data, $from );
2638         }
2639
2640         /**
2641          * Call to WikiPage function for backwards compatibility.
2642          * @see WikiPage::loadPageData
2643          */
2644         public function loadPageData( $from = 'fromdb' ) {
2645                 $this->mPage->loadPageData( $from );
2646         }
2647
2648         /**
2649          * Call to WikiPage function for backwards compatibility.
2650          * @see WikiPage::lockAndGetLatest
2651          */
2652         public function lockAndGetLatest() {
2653                 return $this->mPage->lockAndGetLatest();
2654         }
2655
2656         /**
2657          * Call to WikiPage function for backwards compatibility.
2658          * @see WikiPage::makeParserOptions
2659          */
2660         public function makeParserOptions( $context ) {
2661                 return $this->mPage->makeParserOptions( $context );
2662         }
2663
2664         /**
2665          * Call to WikiPage function for backwards compatibility.
2666          * @see WikiPage::pageDataFromId
2667          */
2668         public function pageDataFromId( $dbr, $id, $options = [] ) {
2669                 return $this->mPage->pageDataFromId( $dbr, $id, $options );
2670         }
2671
2672         /**
2673          * Call to WikiPage function for backwards compatibility.
2674          * @see WikiPage::pageDataFromTitle
2675          */
2676         public function pageDataFromTitle( $dbr, $title, $options = [] ) {
2677                 return $this->mPage->pageDataFromTitle( $dbr, $title, $options );
2678         }
2679
2680         /**
2681          * Call to WikiPage function for backwards compatibility.
2682          * @see WikiPage::prepareContentForEdit
2683          */
2684         public function prepareContentForEdit(
2685                 Content $content, $revision = null, User $user = null,
2686                 $serialFormat = null, $useCache = true
2687         ) {
2688                 return $this->mPage->prepareContentForEdit(
2689                         $content, $revision, $user,
2690                         $serialFormat, $useCache
2691                 );
2692         }
2693
2694         /**
2695          * Call to WikiPage function for backwards compatibility.
2696          * @see WikiPage::protectDescription
2697          */
2698         public function protectDescription( array $limit, array $expiry ) {
2699                 return $this->mPage->protectDescription( $limit, $expiry );
2700         }
2701
2702         /**
2703          * Call to WikiPage function for backwards compatibility.
2704          * @see WikiPage::protectDescriptionLog
2705          */
2706         public function protectDescriptionLog( array $limit, array $expiry ) {
2707                 return $this->mPage->protectDescriptionLog( $limit, $expiry );
2708         }
2709
2710         /**
2711          * Call to WikiPage function for backwards compatibility.
2712          * @see WikiPage::replaceSectionAtRev
2713          */
2714         public function replaceSectionAtRev( $sectionId, Content $sectionContent,
2715                 $sectionTitle = '', $baseRevId = null
2716         ) {
2717                 return $this->mPage->replaceSectionAtRev( $sectionId, $sectionContent,
2718                         $sectionTitle, $baseRevId
2719                 );
2720         }
2721
2722         /**
2723          * Call to WikiPage function for backwards compatibility.
2724          * @see WikiPage::replaceSectionContent
2725          */
2726         public function replaceSectionContent(
2727                 $sectionId, Content $sectionContent, $sectionTitle = '', $edittime = null
2728         ) {
2729                 return $this->mPage->replaceSectionContent(
2730                         $sectionId, $sectionContent, $sectionTitle, $edittime
2731                 );
2732         }
2733
2734         /**
2735          * Call to WikiPage function for backwards compatibility.
2736          * @see WikiPage::setTimestamp
2737          */
2738         public function setTimestamp( $ts ) {
2739                 return $this->mPage->setTimestamp( $ts );
2740         }
2741
2742         /**
2743          * Call to WikiPage function for backwards compatibility.
2744          * @see WikiPage::shouldCheckParserCache
2745          */
2746         public function shouldCheckParserCache( ParserOptions $parserOptions, $oldId ) {
2747                 return $this->mPage->shouldCheckParserCache( $parserOptions, $oldId );
2748         }
2749
2750         /**
2751          * Call to WikiPage function for backwards compatibility.
2752          * @see WikiPage::supportsSections
2753          */
2754         public function supportsSections() {
2755                 return $this->mPage->supportsSections();
2756         }
2757
2758         /**
2759          * Call to WikiPage function for backwards compatibility.
2760          * @see WikiPage::triggerOpportunisticLinksUpdate
2761          */
2762         public function triggerOpportunisticLinksUpdate( ParserOutput $parserOutput ) {
2763                 return $this->mPage->triggerOpportunisticLinksUpdate( $parserOutput );
2764         }
2765
2766         /**
2767          * Call to WikiPage function for backwards compatibility.
2768          * @see WikiPage::updateCategoryCounts
2769          */
2770         public function updateCategoryCounts( array $added, array $deleted, $id = 0 ) {
2771                 return $this->mPage->updateCategoryCounts( $added, $deleted, $id );
2772         }
2773
2774         /**
2775          * Call to WikiPage function for backwards compatibility.
2776          * @see WikiPage::updateIfNewerOn
2777          */
2778         public function updateIfNewerOn( $dbw, $revision ) {
2779                 return $this->mPage->updateIfNewerOn( $dbw, $revision );
2780         }
2781
2782         /**
2783          * Call to WikiPage function for backwards compatibility.
2784          * @see WikiPage::updateRedirectOn
2785          */
2786         public function updateRedirectOn( $dbw, $redirectTitle, $lastRevIsRedirect = null ) {
2787                 return $this->mPage->updateRedirectOn( $dbw, $redirectTitle, $lastRevIsRedirect );
2788         }
2789
2790         /**
2791          * Call to WikiPage function for backwards compatibility.
2792          * @see WikiPage::updateRevisionOn
2793          */
2794         public function updateRevisionOn( $dbw, $revision, $lastRevision = null,
2795                 $lastRevIsRedirect = null
2796         ) {
2797                 return $this->mPage->updateRevisionOn( $dbw, $revision, $lastRevision,
2798                         $lastRevIsRedirect
2799                 );
2800         }
2801
2802         /**
2803          * @param array $limit
2804          * @param array $expiry
2805          * @param bool &$cascade
2806          * @param string $reason
2807          * @param User $user
2808          * @return Status
2809          */
2810         public function doUpdateRestrictions( array $limit, array $expiry, &$cascade,
2811                 $reason, User $user
2812         ) {
2813                 return $this->mPage->doUpdateRestrictions( $limit, $expiry, $cascade, $reason, $user );
2814         }
2815
2816         /**
2817          * @param array $limit
2818          * @param string $reason
2819          * @param int &$cascade
2820          * @param array $expiry
2821          * @return bool
2822          */
2823         public function updateRestrictions( $limit = [], $reason = '',
2824                 &$cascade = 0, $expiry = []
2825         ) {
2826                 return $this->mPage->doUpdateRestrictions(
2827                         $limit,
2828                         $expiry,
2829                         $cascade,
2830                         $reason,
2831                         $this->getContext()->getUser()
2832                 );
2833         }
2834
2835         /**
2836          * @param string $reason
2837          * @param bool $suppress
2838          * @param int|null $u1 Unused
2839          * @param bool|null $u2 Unused
2840          * @param string &$error
2841          * @param bool $immediate false allows deleting over time via the job queue
2842          * @return bool
2843          * @throws FatalError
2844          * @throws MWException
2845          */
2846         public function doDeleteArticle(
2847                 $reason, $suppress = false, $u1 = null, $u2 = null, &$error = '', $immediate = false
2848         ) {
2849                 return $this->mPage->doDeleteArticle( $reason, $suppress, $u1, $u2, $error,
2850                         null, $immediate );
2851         }
2852
2853         /**
2854          * @param string $fromP
2855          * @param string $summary
2856          * @param string $token
2857          * @param bool $bot
2858          * @param array &$resultDetails
2859          * @param User|null $user
2860          * @return array
2861          */
2862         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails, User $user = null ) {
2863                 $user = is_null( $user ) ? $this->getContext()->getUser() : $user;
2864                 return $this->mPage->doRollback( $fromP, $summary, $token, $bot, $resultDetails, $user );
2865         }
2866
2867         /**
2868          * @param string $fromP
2869          * @param string $summary
2870          * @param bool $bot
2871          * @param array &$resultDetails
2872          * @param User|null $guser
2873          * @return array
2874          */
2875         public function commitRollback( $fromP, $summary, $bot, &$resultDetails, User $guser = null ) {
2876                 $guser = is_null( $guser ) ? $this->getContext()->getUser() : $guser;
2877                 return $this->mPage->commitRollback( $fromP, $summary, $bot, $resultDetails, $guser );
2878         }
2879
2880         /**
2881          * @param bool &$hasHistory
2882          * @return mixed
2883          */
2884         public function generateReason( &$hasHistory ) {
2885                 $title = $this->mPage->getTitle();
2886                 $handler = ContentHandler::getForTitle( $title );
2887                 return $handler->getAutoDeleteReason( $title, $hasHistory );
2888         }
2889
2890         // ******
2891 }