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\Storage\MutableRevisionRecord;
  24 use MediaWiki\Storage\RevisionRecord;
  25
  26 /**
  27  * Class for viewing MediaWiki article and history.
  28  *
  29  * This maintains WikiPage functions for backwards compatibility.
  30  *
  31  * @todo Move and rewrite code to an Action class
  32  *
  33  * See design.txt for an overview.
  34  * Note: edit user interface and cache support functions have been
  35  * moved to separate EditPage and HTMLFileCache classes.
  36  */
  37 class Article implements Page {
  38         /**
  39          * @var IContextSource|null The context this Article is executed in.
  40          * If null, RequestContext::getMain() is used.
  41          */
  42         protected $mContext;
  43
  44         /** @var WikiPage|null The WikiPage object of this instance */
  45         protected $mPage;
  46
  47         /**
  48          * @var ParserOptions|null ParserOptions object for $wgUser articles.
  49          * Initialized by getParserOptions by calling $this->mPage->makeParserOptions().
  50          */
  51         public $mParserOptions;
  52
  53         /**
  54          * @var Content|null Content of the main slot of $this->mRevision.
  55          * @note This variable is read only, setting it has no effect.
  56          *       Extensions that wish to override the output of Article::view should use a hook.
  57          * @todo MCR: Remove in 1.33
  58          * @deprecated since 1.32
  59          * @since 1.21
  60          */
  61         public $mContentObject;
  62
  63         /**
  64          * @var bool Is the target revision loaded? Set by fetchRevisionRecord().
  65          *
  66          * @deprecated since 1.32. Whether content has been loaded should not be relevant to
  67          * code outside this class.
  68          */
  69         public $mContentLoaded = false;
  70
  71         /**
  72          * @var int|null The oldid of the article that was requested to be shown,
  73          * 0 for the current revision.
  74          * @see $mRevIdFetched
  75          */
  76         public $mOldId;
  77
  78         /** @var Title|null Title from which we were redirected here, if any. */
  79         public $mRedirectedFrom = null;
  80
  81         /** @var string|bool URL to redirect to or false if none */
  82         public $mRedirectUrl = false;
  83
  84         /**
  85          * @var int Revision ID of revision that was loaded.
  86          * @see $mOldId
  87          * @deprecated since 1.32, use getRevIdFetched() instead.
  88          */
  89         public $mRevIdFetched = 0;
  90
  91         /**
  92          * @var Status|null represents the outcome of fetchRevisionRecord().
  93          * $fetchResult->value is the RevisionRecord object, if the operation was successful.
  94          *
  95          * The information in $fetchResult is duplicated by the following deprecated public fields:
  96          * $mRevIdFetched, $mContentLoaded. $mRevision (and $mContentObject) also typically duplicate
  97          * information of the loaded revision, but may be overwritten by extensions or due to errors.
  98          */
  99         private $fetchResult = null;
 100
 101         /**
 102          * @var Revision|null Revision to be shown. Initialized by getOldIDFromRequest()
 103          * or fetchContentObject(). Normally loaded from the database, but may be replaced
 104          * by an extension, or be a fake representing an error message or some such.
 105          * While the output of Article::view is typically based on this revision,
 106          * it may be overwritten by error messages or replaced by extensions.
 107          */
 108         public $mRevision = null;
 109
 110         /**
 111          * @var ParserOutput|null|false The ParserOutput generated for viewing the page,
 112          * initialized by view(). If no ParserOutput could be generated, this is set to false.
 113          * @deprecated since 1.32
 114          */
 115         public $mParserOutput = null;
 116
 117         /**
 118          * @var bool Whether render() was called. With the way subclasses work
 119          * here, there doesn't seem to be any other way to stop calling
 120          * OutputPage::enableSectionEditLinks() and still have it work as it did before.
 121          */
 122         private $disableSectionEditForRender = false;
 123
 124         /**
 125          * Constructor and clear the article
 126          * @param Title $title Reference to a Title object.
 127          * @param int|null $oldId Revision ID, null to fetch from request, zero for current
 128          */
 129         public function __construct( Title $title, $oldId = null ) {
 130                 $this->mOldId = $oldId;
 131                 $this->mPage = $this->newPage( $title );
 132         }
 133
 134         /**
 135          * @param Title $title
 136          * @return WikiPage
 137          */
 138         protected function newPage( Title $title ) {
 139                 return new WikiPage( $title );
 140         }
 141
 142         /**
 143          * Constructor from a page id
 144          * @param int $id Article ID to load
 145          * @return Article|null
 146          */
 147         public static function newFromID( $id ) {
 148                 $t = Title::newFromID( $id );
 149                 return $t == null ? null : new static( $t );
 150         }
 151
 152         /**
 153          * Create an Article object of the appropriate class for the given page.
 154          *
 155          * @param Title $title
 156          * @param IContextSource $context
 157          * @return Article
 158          */
 159         public static function newFromTitle( $title, IContextSource $context ) {
 160                 if ( NS_MEDIA == $title->getNamespace() ) {
 161                         // XXX: This should not be here, but where should it go?
 162                         $title = Title::makeTitle( NS_FILE, $title->getDBkey() );
 163                 }
 164
 165                 $page = null;
 166                 Hooks::run( 'ArticleFromTitle', [ &$title, &$page, $context ] );
 167                 if ( !$page ) {
 168                         switch ( $title->getNamespace() ) {
 169                                 case NS_FILE:
 170                                         $page = new ImagePage( $title );
 171                                         break;
 172                                 case NS_CATEGORY:
 173                                         $page = new CategoryPage( $title );
 174                                         break;
 175                                 default:
 176                                         $page = new Article( $title );
 177                         }
 178                 }
 179                 $page->setContext( $context );
 180
 181                 return $page;
 182         }
 183
 184         /**
 185          * Create an Article object of the appropriate class for the given page.
 186          *
 187          * @param WikiPage $page
 188          * @param IContextSource $context
 189          * @return Article
 190          */
 191         public static function newFromWikiPage( WikiPage $page, IContextSource $context ) {
 192                 $article = self::newFromTitle( $page->getTitle(), $context );
 193                 $article->mPage = $page; // override to keep process cached vars
 194                 return $article;
 195         }
 196
 197         /**
 198          * Get the page this view was redirected from
 199          * @return Title|null
 200          * @since 1.28
 201          */
 202         public function getRedirectedFrom() {
 203                 return $this->mRedirectedFrom;
 204         }
 205
 206         /**
 207          * Tell the page view functions that this view was redirected
 208          * from another page on the wiki.
 209          * @param Title $from
 210          */
 211         public function setRedirectedFrom( Title $from ) {
 212                 $this->mRedirectedFrom = $from;
 213         }
 214
 215         /**
 216          * Get the title object of the article
 217          *
 218          * @return Title Title object of this page
 219          */
 220         public function getTitle() {
 221                 return $this->mPage->getTitle();
 222         }
 223
 224         /**
 225          * Get the WikiPage object of this instance
 226          *
 227          * @since 1.19
 228          * @return WikiPage
 229          */
 230         public function getPage() {
 231                 return $this->mPage;
 232         }
 233
 234         /**
 235          * Clear the object
 236          */
 237         public function clear() {
 238                 $this->mContentLoaded = false;
 239
 240                 $this->mRedirectedFrom = null; # Title object if set
 241                 $this->mRevIdFetched = 0;
 242                 $this->mRedirectUrl = false;
 243                 $this->mRevision = null;
 244                 $this->mContentObject = null;
 245                 $this->fetchResult = null;
 246
 247                 // TODO hard-deprecate direct access to public fields
 248
 249                 $this->mPage->clear();
 250         }
 251
 252         /**
 253          * Returns a Content object representing the pages effective display content,
 254          * not necessarily the revision's content!
 255          *
 256          * Note that getContent does not follow redirects anymore.
 257          * If you need to fetch redirectable content easily, try
 258          * the shortcut in WikiPage::getRedirectTarget()
 259          *
 260          * This function has side effects! Do not use this function if you
 261          * only want the real revision text if any.
 262          *
 263          * @deprecated since 1.32, use getRevisionFetched() or fetchRevisionRecord() instead.
 264          *
 265          * @return Content
 266          *
 267          * @since 1.21
 268          */
 269         protected function getContentObject() {
 270                 if ( $this->mPage->getId() === 0 ) {
 271                         $content = $this->getSubstituteContent();
 272                 } else {
 273                         $this->fetchContentObject();
 274                         $content = $this->mContentObject;
 275                 }
 276
 277                 return $content;
 278         }
 279
 280         /**
 281          * Returns Content object to use when the page does not exist.
 282          *
 283          * @return Content
 284          */
 285         private function getSubstituteContent() {
 286                 # If this is a MediaWiki:x message, then load the messages
 287                 # and return the message value for x.
 288                 if ( $this->getTitle()->getNamespace() == NS_MEDIAWIKI ) {
 289                         $text = $this->getTitle()->getDefaultMessageText();
 290                         if ( $text === false ) {
 291                                 $text = '';
 292                         }
 293
 294                         $content = ContentHandler::makeContent( $text, $this->getTitle() );
 295                 } else {
 296                         $message = $this->getContext()->getUser()->isLoggedIn() ? 'noarticletext' : 'noarticletextanon';
 297                         $content = new MessageContent( $message, null, 'parsemag' );
 298                 }
 299
 300                 return $content;
 301         }
 302
 303         /**
 304          * Returns ParserOutput to use when a page does not exist. In some cases, we still want to show
 305          * "virtual" content, e.g. in the MediaWiki namespace, or in the File namespace for non-local
 306          * files.
 307          *
 308          * @param ParserOptions $options
 309          *
 310          * @return ParserOutput
 311          */
 312         protected function getEmptyPageParserOutput( ParserOptions $options ) {
 313                 $content = $this->getSubstituteContent();
 314
 315                 return $content->getParserOutput( $this->getTitle(), 0, $options );
 316         }
 317
 318         /**
 319          * @see getOldIDFromRequest()
 320          * @see getRevIdFetched()
 321          *
 322          * @return int The oldid of the article that is was requested in the constructor or via the
 323          *         context's WebRequest.
 324          */
 325         public function getOldID() {
 326                 if ( is_null( $this->mOldId ) ) {
 327                         $this->mOldId = $this->getOldIDFromRequest();
 328                 }
 329
 330                 return $this->mOldId;
 331         }
 332
 333         /**
 334          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 335          *
 336          * @return int The old id for the request
 337          */
 338         public function getOldIDFromRequest() {
 339                 $this->mRedirectUrl = false;
 340
 341                 $request = $this->getContext()->getRequest();
 342                 $oldid = $request->getIntOrNull( 'oldid' );
 343
 344                 if ( $oldid === null ) {
 345                         return 0;
 346                 }
 347
 348                 if ( $oldid !== 0 ) {
 349                         # Load the given revision and check whether the page is another one.
 350                         # In that case, update this instance to reflect the change.
 351                         if ( $oldid === $this->mPage->getLatest() ) {
 352                                 $this->mRevision = $this->mPage->getRevision();
 353                         } else {
 354                                 $this->mRevision = Revision::newFromId( $oldid );
 355                                 if ( $this->mRevision !== null ) {
 356                                         // Revision title doesn't match the page title given?
 357                                         if ( $this->mPage->getId() != $this->mRevision->getPage() ) {
 358                                                 $function = get_class( $this->mPage ) . '::newFromID';
 359                                                 $this->mPage = $function( $this->mRevision->getPage() );
 360                                         }
 361                                 }
 362                         }
 363                 }
 364
 365                 if ( $request->getVal( 'direction' ) == 'next' ) {
 366                         $nextid = $this->getTitle()->getNextRevisionID( $oldid );
 367                         if ( $nextid ) {
 368                                 $oldid = $nextid;
 369                                 $this->mRevision = null;
 370                         } else {
 371                                 $this->mRedirectUrl = $this->getTitle()->getFullURL( 'redirect=no' );
 372                         }
 373                 } elseif ( $request->getVal( 'direction' ) == 'prev' ) {
 374                         $previd = $this->getTitle()->getPreviousRevisionID( $oldid );
 375                         if ( $previd ) {
 376                                 $oldid = $previd;
 377                                 $this->mRevision = null;
 378                         }
 379                 }
 380
 381                 $this->mRevIdFetched = $this->mRevision ? $this->mRevision->getId() : 0;
 382
 383                 return $oldid;
 384         }
 385
 386         /**
 387          * Get text content object
 388          * Does *NOT* follow redirects.
 389          * @todo When is this null?
 390          * @deprecated since 1.32, use fetchRevisionRecord() instead.
 391          *
 392          * @note Code that wants to retrieve page content from the database should
 393          * use WikiPage::getContent().
 394          *
 395          * @return Content|null|bool
 396          *
 397          * @since 1.21
 398          */
 399         protected function fetchContentObject() {
 400                 if ( !$this->mContentLoaded ) {
 401                         $this->fetchRevisionRecord();
 402                 }
 403
 404                 return $this->mContentObject;
 405         }
 406
 407         /**
 408          * Fetches the revision to work on.
 409          * The revision is typically loaded from the database, but may also be a fake representing
 410          * an error message or content supplied by an extension. Refer to $this->fetchResult for
 411          * the revision actually loaded from the database, and any errors encountered while doing
 412          * that.
 413          *
 414          * @return RevisionRecord|null
 415          */
 416         protected function fetchRevisionRecord() {
 417                 if ( $this->fetchResult ) {
 418                         return $this->mRevision ? $this->mRevision->getRevisionRecord() : null;
 419                 }
 420
 421                 $this->mContentLoaded = true;
 422                 $this->mContentObject = null;
 423
 424                 $oldid = $this->getOldID();
 425
 426                 // $this->mRevision might already be fetched by getOldIDFromRequest()
 427                 if ( !$this->mRevision ) {
 428                         if ( !$oldid ) {
 429                                 $this->mRevision = $this->mPage->getRevision();
 430
 431                                 if ( !$this->mRevision ) {
 432                                         wfDebug( __METHOD__ . " failed to find page data for title " .
 433                                                 $this->getTitle()->getPrefixedText() . "\n" );
 434
 435                                         // Just for sanity, output for this case is done by showMissingArticle().
 436                                         $this->fetchResult = Status::newFatal( 'noarticletext' );
 437                                         $this->applyContentOverride( $this->makeFetchErrorContent() );
 438                                         return null;
 439                                 }
 440                         } else {
 441                                 $this->mRevision = Revision::newFromId( $oldid );
 442
 443                                 if ( !$this->mRevision ) {
 444                                         wfDebug( __METHOD__ . " failed to load revision, rev_id $oldid\n" );
 445
 446                                         $this->fetchResult = Status::newFatal( 'missing-revision', $oldid );
 447                                         $this->applyContentOverride( $this->makeFetchErrorContent() );
 448                                         return null;
 449                                 }
 450                         }
 451                 }
 452
 453                 $this->mRevIdFetched = $this->mRevision->getId();
 454                 $this->fetchResult = Status::newGood( $this->mRevision );
 455
 456                 if ( !$this->mRevision->userCan( Revision::DELETED_TEXT, $this->getContext()->getUser() ) ) {
 457                         wfDebug( __METHOD__ . " failed to retrieve content of revision " .
 458                                 $this->mRevision->getId() . "\n" );
 459
 460                         // Just for sanity, output for this case is done by showDeletedRevisionHeader().
 461                         $this->fetchResult = Status::newFatal( 'rev-deleted-text-permission' );
 462                         $this->applyContentOverride( $this->makeFetchErrorContent() );
 463                         return null;
 464                 }
 465
 466                 if ( Hooks::isRegistered( 'ArticleAfterFetchContentObject' ) ) {
 467                         $contentObject = $this->mRevision->getContent(
 468                                 Revision::FOR_THIS_USER,
 469                                 $this->getContext()->getUser()
 470                         );
 471
 472                         $hookContentObject = $contentObject;
 473
 474                                 // Avoid PHP 7.1 warning of passing $this by reference
 475                         $articlePage = $this;
 476
 477                         Hooks::run(
 478                                 'ArticleAfterFetchContentObject',
 479                                 [ &$articlePage, &$hookContentObject ],
 480                                 '1.32'
 481                         );
 482
 483                         if ( $hookContentObject !== $contentObject ) {
 484                                 // A hook handler is trying to override the content
 485                                 $this->applyContentOverride( $hookContentObject );
 486                         }
 487                 }
 488
 489                 // For B/C only
 490                 $this->mContentObject = $this->mRevision->getContent(
 491                         Revision::FOR_THIS_USER,
 492                         $this->getContext()->getUser()
 493                 );
 494
 495                 return $this->mRevision->getRevisionRecord();
 496         }
 497
 498         /**
 499          * Returns a Content object representing any error in $this->fetchContent, or null
 500          * if there is no such error.
 501          *
 502          * @return Content|null
 503          */
 504         private function makeFetchErrorContent() {
 505                 if ( !$this->fetchResult || $this->fetchResult->isOK() ) {
 506                         return null;
 507                 }
 508
 509                 return new MessageContent( $this->fetchResult->getMessage() );
 510         }
 511
 512         /**
 513          * Applies a content override by constructing a fake Revision object and assigning
 514          * it to mRevision. The fake revision will not have a user, timestamp or summary set.
 515          *
 516          * This mechanism exists mainly to accommodate extensions that use the
 517          * ArticleAfterFetchContentObject. Once that hook has been removed, there should no longer
 518          * be a need for a fake revision object. fetchRevisionRecord() presently also uses this mechanism
 519          * to report errors, but that could be changed to use $this->fetchResult instead.
 520          *
 521          * @param Content $override Content to be used instead of the actual page content,
 522          *        coming from an extension or representing an error message.
 523          */
 524         private function applyContentOverride( Content $override ) {
 525                 // Construct a fake revision
 526                 $rev = new MutableRevisionRecord( $this->getTitle() );
 527                 $rev->setContent( 'main', $override );
 528
 529                 $this->mRevision = new Revision( $rev );
 530
 531                 // For B/C only
 532                 $this->mContentObject = $override;
 533         }
 534
 535         /**
 536          * Returns true if the currently-referenced revision is the current edit
 537          * to this page (and it exists).
 538          * @return bool
 539          */
 540         public function isCurrent() {
 541                 # If no oldid, this is the current version.
 542                 if ( $this->getOldID() == 0 ) {
 543                         return true;
 544                 }
 545
 546                 return $this->mPage->exists() && $this->mRevision && $this->mRevision->isCurrent();
 547         }
 548
 549         /**
 550          * Get the fetched Revision object depending on request parameters or null
 551          * on failure. The revision returned may be a fake representing an error message or
 552          * wrapping content supplied by an extension. Refer to $this->fetchResult for the
 553          * revision actually loaded from the database.
 554          *
 555          * @since 1.19
 556          * @return Revision|null
 557          */
 558         public function getRevisionFetched() {
 559                 $this->fetchRevisionRecord();
 560
 561                 if ( $this->fetchResult->isOK() ) {
 562                         return $this->mRevision;
 563                 }
 564         }
 565
 566         /**
 567          * Use this to fetch the rev ID used on page views
 568          *
 569          * Before fetchRevisionRecord was called, this returns the page's latest revision,
 570          * regardless of what getOldID() returns.
 571          *
 572          * @return int Revision ID of last article revision
 573          */
 574         public function getRevIdFetched() {
 575                 if ( $this->fetchResult && $this->fetchResult->isOK() ) {
 576                         return $this->fetchResult->value->getId();
 577                 } else {
 578                         return $this->mPage->getLatest();
 579                 }
 580         }
 581
 582         /**
 583          * This is the default action of the index.php entry point: just view the
 584          * page of the given title.
 585          */
 586         public function view() {
 587                 global $wgUseFileCache, $wgDebugToolbar;
 588
 589                 # Get variables from query string
 590                 # As side effect this will load the revision and update the title
 591                 # in a revision ID is passed in the request, so this should remain
 592                 # the first call of this method even if $oldid is used way below.
 593                 $oldid = $this->getOldID();
 594
 595                 $user = $this->getContext()->getUser();
 596                 # Another whitelist check in case getOldID() is altering the title
 597                 $permErrors = $this->getTitle()->getUserPermissionsErrors( 'read', $user );
 598                 if ( count( $permErrors ) ) {
 599                         wfDebug( __METHOD__ . ": denied on secondary read check\n" );
 600                         throw new PermissionsError( 'read', $permErrors );
 601                 }
 602
 603                 $outputPage = $this->getContext()->getOutput();
 604                 # getOldID() may as well want us to redirect somewhere else
 605                 if ( $this->mRedirectUrl ) {
 606                         $outputPage->redirect( $this->mRedirectUrl );
 607                         wfDebug( __METHOD__ . ": redirecting due to oldid\n" );
 608
 609                         return;
 610                 }
 611
 612                 # If we got diff in the query, we want to see a diff page instead of the article.
 613                 if ( $this->getContext()->getRequest()->getCheck( 'diff' ) ) {
 614                         wfDebug( __METHOD__ . ": showing diff page\n" );
 615                         $this->showDiffPage();
 616
 617                         return;
 618                 }
 619
 620                 # Set page title (may be overridden by DISPLAYTITLE)
 621                 $outputPage->setPageTitle( $this->getTitle()->getPrefixedText() );
 622
 623                 $outputPage->setArticleFlag( true );
 624                 # Allow frames by default
 625                 $outputPage->allowClickjacking();
 626
 627                 $parserCache = MediaWikiServices::getInstance()->getParserCache();
 628
 629                 $parserOptions = $this->getParserOptions();
 630                 $poOptions = [];
 631                 # Render printable version, use printable version cache
 632                 if ( $outputPage->isPrintable() ) {
 633                         $parserOptions->setIsPrintable( true );
 634                         $poOptions['enableSectionEditLinks'] = false;
 635                 } elseif ( $this->disableSectionEditForRender
 636                         || !$this->isCurrent() || !$this->getTitle()->quickUserCan( 'edit', $user )
 637                 ) {
 638                         $poOptions['enableSectionEditLinks'] = false;
 639                 }
 640
 641                 # Try client and file cache
 642                 if ( !$wgDebugToolbar && $oldid === 0 && $this->mPage->checkTouched() ) {
 643                         # Try to stream the output from file cache
 644                         if ( $wgUseFileCache && $this->tryFileCache() ) {
 645                                 wfDebug( __METHOD__ . ": done file cache\n" );
 646                                 # tell wgOut that output is taken care of
 647                                 $outputPage->disable();
 648                                 $this->mPage->doViewUpdates( $user, $oldid );
 649
 650                                 return;
 651                         }
 652                 }
 653
 654                 # Should the parser cache be used?
 655                 $useParserCache = $this->mPage->shouldCheckParserCache( $parserOptions, $oldid );
 656                 wfDebug( 'Article::view using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
 657                 if ( $user->getStubThreshold() ) {
 658                         MediaWikiServices::getInstance()->getStatsdDataFactory()->increment( 'pcache_miss_stub' );
 659                 }
 660
 661                 $this->showRedirectedFromHeader();
 662                 $this->showNamespaceHeader();
 663
 664                 # Iterate through the possible ways of constructing the output text.
 665                 # Keep going until $outputDone is set, or we run out of things to do.
 666                 $pass = 0;
 667                 $outputDone = false;
 668                 $this->mParserOutput = false;
 669
 670                 while ( !$outputDone && ++$pass ) {
 671                         switch ( $pass ) {
 672                                 case 1:
 673                                         // Avoid PHP 7.1 warning of passing $this by reference
 674                                         $articlePage = $this;
 675                                         Hooks::run( 'ArticleViewHeader', [ &$articlePage, &$outputDone, &$useParserCache ] );
 676                                         break;
 677                                 case 2:
 678                                         # Early abort if the page doesn't exist
 679                                         if ( !$this->mPage->exists() ) {
 680                                                 wfDebug( __METHOD__ . ": showing missing article\n" );
 681                                                 $this->showMissingArticle();
 682                                                 $this->mPage->doViewUpdates( $user );
 683                                                 return;
 684                                         }
 685
 686                                         # Try the parser cache
 687                                         if ( $useParserCache ) {
 688                                                 $this->mParserOutput = $parserCache->get( $this->mPage, $parserOptions );
 689
 690                                                 if ( $this->mParserOutput !== false ) {
 691                                                         if ( $oldid ) {
 692                                                                 wfDebug( __METHOD__ . ": showing parser cache contents for current rev permalink\n" );
 693                                                                 $this->setOldSubtitle( $oldid );
 694                                                         } else {
 695                                                                 wfDebug( __METHOD__ . ": showing parser cache contents\n" );
 696                                                         }
 697                                                         $outputPage->addParserOutput( $this->mParserOutput, $poOptions );
 698                                                         # Ensure that UI elements requiring revision ID have
 699                                                         # the correct version information.
 700                                                         $outputPage->setRevisionId( $this->mPage->getLatest() );
 701                                                         # Preload timestamp to avoid a DB hit
 702                                                         $cachedTimestamp = $this->mParserOutput->getTimestamp();
 703                                                         if ( $cachedTimestamp !== null ) {
 704                                                                 $outputPage->setRevisionTimestamp( $cachedTimestamp );
 705                                                                 $this->mPage->setTimestamp( $cachedTimestamp );
 706                                                         }
 707                                                         $outputDone = true;
 708                                                 }
 709                                         }
 710                                         break;
 711                                 case 3:
 712                                         # Are we looking at an old revision
 713                                         $rev = $this->fetchRevisionRecord();
 714                                         if ( $oldid && $this->fetchResult->isOK() ) {
 715                                                 $this->setOldSubtitle( $oldid );
 716
 717                                                 if ( !$this->showDeletedRevisionHeader() ) {
 718                                                         wfDebug( __METHOD__ . ": cannot view deleted revision\n" );
 719                                                         return;
 720                                                 }
 721                                         }
 722
 723                                         # Ensure that UI elements requiring revision ID have
 724                                         # the correct version information.
 725                                         $outputPage->setRevisionId( $this->getRevIdFetched() );
 726                                         # Preload timestamp to avoid a DB hit
 727                                         $outputPage->setRevisionTimestamp( $this->mPage->getTimestamp() );
 728
 729                                         # Pages containing custom CSS or JavaScript get special treatment
 730                                         if ( $this->getTitle()->isSiteConfigPage() || $this->getTitle()->isUserConfigPage() ) {
 731                                                 $dir = $this->getContext()->getLanguage()->getDir();
 732                                                 $lang = $this->getContext()->getLanguage()->getHtmlCode();
 733
 734                                                 $outputPage->wrapWikiMsg(
 735                                                         "<div id='mw-clearyourcache' lang='$lang' dir='$dir' class='mw-content-$dir'>\n$1\n</div>",
 736                                                         'clearyourcache'
 737                                                 );
 738                                         } elseif ( !Hooks::run( 'ArticleRevisionViewCustom', [
 739                                                         $rev,
 740                                                         $this->getTitle(),
 741                                                         $oldid,
 742                                                         $outputPage,
 743                                                 ] )
 744                                         ) {
 745                                                 // NOTE: sync with hooks called in DifferenceEngine::renderNewRevision()
 746                                                 // Allow extensions do their own custom view for certain pages
 747                                                 $outputDone = true;
 748                                         } elseif ( !Hooks::run( 'ArticleContentViewCustom',
 749                                                 [ $this->fetchContentObject(), $this->getTitle(), $outputPage ], '1.32' )
 750                                         ) {
 751                                                 // NOTE: sync with hooks called in DifferenceEngine::renderNewRevision()
 752                                                 // Allow extensions do their own custom view for certain pages
 753                                                 $outputDone = true;
 754                                         }
 755                                         break;
 756                                 case 4:
 757                                         # Run the parse, protected by a pool counter
 758                                         wfDebug( __METHOD__ . ": doing uncached parse\n" );
 759
 760                                         $rev = $this->fetchRevisionRecord();
 761                                         $error = null;
 762
 763                                         if ( $rev ) {
 764                                                 $poolArticleView = new PoolWorkArticleView(
 765                                                         $this->getPage(),
 766                                                         $parserOptions,
 767                                                         $this->getRevIdFetched(),
 768                                                         $useParserCache,
 769                                                         $rev
 770                                                 );
 771                                                 $ok = $poolArticleView->execute();
 772                                                 $error = $poolArticleView->getError();
 773                                                 $this->mParserOutput = $poolArticleView->getParserOutput() ?: null;
 774
 775                                                 # Don't cache a dirty ParserOutput object
 776                                                 if ( $poolArticleView->getIsDirty() ) {
 777                                                         $outputPage->setCdnMaxage( 0 );
 778                                                         $outputPage->addHTML( "<!-- parser cache is expired, " .
 779                                                                 "sending anyway due to pool overload-->\n" );
 780                                                 }
 781                                         } else {
 782                                                 $ok = false;
 783                                         }
 784
 785                                         if ( !$ok ) {
 786                                                 if ( $error ) {
 787                                                         $outputPage->clearHTML(); // for release() errors
 788                                                         $outputPage->enableClientCache( false );
 789                                                         $outputPage->setRobotPolicy( 'noindex,nofollow' );
 790
 791                                                         $errortext = $error->getWikiText( false, 'view-pool-error' );
 792                                                         $outputPage->addWikiText( Html::errorBox( $errortext ) );
 793                                                 }
 794                                                 # Connection or timeout error
 795                                                 return;
 796                                         }
 797
 798                                         if ( $this->mParserOutput ) {
 799                                                 $outputPage->addParserOutput( $this->mParserOutput, $poOptions );
 800                                         }
 801
 802                                         if ( $rev && $this->getRevisionRedirectTarget( $rev ) ) {
 803                                                 $outputPage->addSubtitle( "<span id=\"redirectsub\">" .
 804                                                         $this->getContext()->msg( 'redirectpagesub' )->parse() . "</span>" );
 805                                         }
 806
 807                                         $outputDone = true;
 808                                         break;
 809                                 # Should be unreachable, but just in case...
 810                                 default:
 811                                         break 2;
 812                         }
 813                 }
 814
 815                 // Get the ParserOutput actually *displayed* here.
 816                 // Note that $this->mParserOutput is the *current*/oldid version output.
 817                 // Note that the ArticleViewHeader hook is allowed to set $outputDone to a
 818                 // ParserOutput instance.
 819                 $pOutput = ( $outputDone instanceof ParserOutput )
 820                         // phpcs:ignore MediaWiki.Usage.NestedInlineTernary.UnparenthesizedTernary -- FIXME T203805
 821                         ? $outputDone // object fetched by hook
 822                         : $this->mParserOutput ?: null; // ParserOutput or null, avoid false
 823
 824                 # Adjust title for main page & pages with displaytitle
 825                 if ( $pOutput ) {
 826                         $this->adjustDisplayTitle( $pOutput );
 827                 }
 828
 829                 # For the main page, overwrite the <title> element with the con-
 830                 # tents of 'pagetitle-view-mainpage' instead of the default (if
 831                 # that's not empty).
 832                 # This message always exists because it is in the i18n files
 833                 if ( $this->getTitle()->isMainPage() ) {
 834                         $msg = wfMessage( 'pagetitle-view-mainpage' )->inContentLanguage();
 835                         if ( !$msg->isDisabled() ) {
 836                                 $outputPage->setHTMLTitle( $msg->title( $this->getTitle() )->text() );
 837                         }
 838                 }
 839
 840                 # Use adaptive TTLs for CDN so delayed/failed purges are noticed less often.
 841                 # This could use getTouched(), but that could be scary for major template edits.
 842                 $outputPage->adaptCdnTTL( $this->mPage->getTimestamp(), IExpiringStore::TTL_DAY );
 843
 844                 # Check for any __NOINDEX__ tags on the page using $pOutput
 845                 $policy = $this->getRobotPolicy( 'view', $pOutput ?: null );
 846                 $outputPage->setIndexPolicy( $policy['index'] );
 847                 $outputPage->setFollowPolicy( $policy['follow'] ); // FIXME: test this
 848
 849                 $this->showViewFooter();
 850                 $this->mPage->doViewUpdates( $user, $oldid ); // FIXME: test this
 851
 852                 # Load the postEdit module if the user just saved this revision
 853                 # See also EditPage::setPostEditCookie
 854                 $request = $this->getContext()->getRequest();
 855                 $cookieKey = EditPage::POST_EDIT_COOKIE_KEY_PREFIX . $this->getRevIdFetched();
 856                 $postEdit = $request->getCookie( $cookieKey );
 857                 if ( $postEdit ) {
 858                         # Clear the cookie. This also prevents caching of the response.
 859                         $request->response()->clearCookie( $cookieKey );
 860                         $outputPage->addJsConfigVars( 'wgPostEdit', $postEdit );
 861                         $outputPage->addModules( 'mediawiki.action.view.postEdit' ); // FIXME: test this
 862                 }
 863         }
 864
 865         /**
 866          * @param RevisionRecord $revision
 867          * @return null|Title
 868          */
 869         private function getRevisionRedirectTarget( RevisionRecord $revision ) {
 870                 // TODO: find a *good* place for the code that determines the redirect target for
 871                 // a given revision!
 872                 // NOTE: Use main slot content. Compare code in DerivedPageDataUpdater::revisionIsRedirect.
 873                 $content = $revision->getContent( 'main' );
 874                 return $content ? $content->getRedirectTarget() : null;
 875         }
 876
 877         /**
 878          * Adjust title for pages with displaytitle, -{T|}- or language conversion
 879          * @param ParserOutput $pOutput
 880          */
 881         public function adjustDisplayTitle( ParserOutput $pOutput ) {
 882                 $out = $this->getContext()->getOutput();
 883
 884                 # Adjust the title if it was set by displaytitle, -{T|}- or language conversion
 885                 $titleText = $pOutput->getTitleText();
 886                 if ( strval( $titleText ) !== '' ) {
 887                         $out->setPageTitle( $titleText );
 888                         $out->setDisplayTitle( $titleText );
 889                 }
 890         }
 891
 892         /**
 893          * Show a diff page according to current request variables. For use within
 894          * Article::view() only, other callers should use the DifferenceEngine class.
 895          */
 896         protected function showDiffPage() {
 897                 $request = $this->getContext()->getRequest();
 898                 $user = $this->getContext()->getUser();
 899                 $diff = $request->getVal( 'diff' );
 900                 $rcid = $request->getVal( 'rcid' );
 901                 $diffOnly = $request->getBool( 'diffonly', $user->getOption( 'diffonly' ) );
 902                 $purge = $request->getVal( 'action' ) == 'purge';
 903                 $unhide = $request->getInt( 'unhide' ) == 1;
 904                 $oldid = $this->getOldID();
 905
 906                 $rev = $this->getRevisionFetched();
 907
 908                 if ( !$rev ) {
 909                         $this->getContext()->getOutput()->setPageTitle( wfMessage( 'errorpagetitle' ) );
 910                         $msg = $this->getContext()->msg( 'difference-missing-revision' )
 911                                 ->params( $oldid )
 912                                 ->numParams( 1 )
 913                                 ->parseAsBlock();
 914                         $this->getContext()->getOutput()->addHTML( $msg );
 915                         return;
 916                 }
 917
 918                 $contentHandler = $rev->getContentHandler();
 919                 $de = $contentHandler->createDifferenceEngine(
 920                         $this->getContext(),
 921                         $oldid,
 922                         $diff,
 923                         $rcid,
 924                         $purge,
 925                         $unhide
 926                 );
 927
 928                 // DifferenceEngine directly fetched the revision:
 929                 $this->mRevIdFetched = $de->getNewid();
 930                 $de->showDiffPage( $diffOnly );
 931
 932                 // Run view updates for the newer revision being diffed (and shown
 933                 // below the diff if not $diffOnly).
 934                 list( $old, $new ) = $de->mapDiffPrevNext( $oldid, $diff );
 935                 // New can be false, convert it to 0 - this conveniently means the latest revision
 936                 $this->mPage->doViewUpdates( $user, (int)$new );
 937         }
 938
 939         /**
 940          * Get the robot policy to be used for the current view
 941          * @param string $action The action= GET parameter
 942          * @param ParserOutput|null $pOutput
 943          * @return array The policy that should be set
 944          * @todo actions other than 'view'
 945          */
 946         public function getRobotPolicy( $action, ParserOutput $pOutput = null ) {
 947                 global $wgArticleRobotPolicies, $wgNamespaceRobotPolicies, $wgDefaultRobotPolicy;
 948
 949                 $ns = $this->getTitle()->getNamespace();
 950
 951                 # Don't index user and user talk pages for blocked users (T13443)
 952                 if ( ( $ns == NS_USER || $ns == NS_USER_TALK ) && !$this->getTitle()->isSubpage() ) {
 953                         $specificTarget = null;
 954                         $vagueTarget = null;
 955                         $titleText = $this->getTitle()->getText();
 956                         if ( IP::isValid( $titleText ) ) {
 957                                 $vagueTarget = $titleText;
 958                         } else {
 959                                 $specificTarget = $titleText;
 960                         }
 961                         if ( Block::newFromTarget( $specificTarget, $vagueTarget ) instanceof Block ) {
 962                                 return [
 963                                         'index' => 'noindex',
 964                                         'follow' => 'nofollow'
 965                                 ];
 966                         }
 967                 }
 968
 969                 if ( $this->mPage->getId() === 0 || $this->getOldID() ) {
 970                         # Non-articles (special pages etc), and old revisions
 971                         return [
 972                                 'index' => 'noindex',
 973                                 'follow' => 'nofollow'
 974                         ];
 975                 } elseif ( $this->getContext()->getOutput()->isPrintable() ) {
 976                         # Discourage indexing of printable versions, but encourage following
 977                         return [
 978                                 'index' => 'noindex',
 979                                 'follow' => 'follow'
 980                         ];
 981                 } elseif ( $this->getContext()->getRequest()->getInt( 'curid' ) ) {
 982                         # For ?curid=x urls, disallow indexing
 983                         return [
 984                                 'index' => 'noindex',
 985                                 'follow' => 'follow'
 986                         ];
 987                 }
 988
 989                 # Otherwise, construct the policy based on the various config variables.
 990                 $policy = self::formatRobotPolicy( $wgDefaultRobotPolicy );
 991
 992                 if ( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 993                         # Honour customised robot policies for this namespace
 994                         $policy = array_merge(
 995                                 $policy,
 996                                 self::formatRobotPolicy( $wgNamespaceRobotPolicies[$ns] )
 997                         );
 998                 }
 999                 if ( $this->getTitle()->canUseNoindex() && is_object( $pOutput ) && $pOutput->getIndexPolicy() ) {
1000                         # __INDEX__ and __NOINDEX__ magic words, if allowed. Incorporates
1001                         # a final sanity check that we have really got the parser output.
1002                         $policy = array_merge(
1003                                 $policy,
1004                                 [ 'index' => $pOutput->getIndexPolicy() ]
1005                         );
1006                 }
1007
1008                 if ( isset( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] ) ) {
1009                         # (T16900) site config can override user-defined __INDEX__ or __NOINDEX__
1010                         $policy = array_merge(
1011                                 $policy,
1012                                 self::formatRobotPolicy( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] )
1013                         );
1014                 }
1015
1016                 return $policy;
1017         }
1018
1019         /**
1020          * Converts a String robot policy into an associative array, to allow
1021          * merging of several policies using array_merge().
1022          * @param array|string $policy Returns empty array on null/false/'', transparent
1023          *   to already-converted arrays, converts string.
1024          * @return array 'index' => \<indexpolicy\>, 'follow' => \<followpolicy\>
1025          */
1026         public static function formatRobotPolicy( $policy ) {
1027                 if ( is_array( $policy ) ) {
1028                         return $policy;
1029                 } elseif ( !$policy ) {
1030                         return [];
1031                 }
1032
1033                 $policy = explode( ',', $policy );
1034                 $policy = array_map( 'trim', $policy );
1035
1036                 $arr = [];
1037                 foreach ( $policy as $var ) {
1038                         if ( in_array( $var, [ 'index', 'noindex' ] ) ) {
1039                                 $arr['index'] = $var;
1040                         } elseif ( in_array( $var, [ 'follow', 'nofollow' ] ) ) {
1041                                 $arr['follow'] = $var;
1042                         }
1043                 }
1044
1045                 return $arr;
1046         }
1047
1048         /**
1049          * If this request is a redirect view, send "redirected from" subtitle to
1050          * the output. Returns true if the header was needed, false if this is not
1051          * a redirect view. Handles both local and remote redirects.
1052          *
1053          * @return bool
1054          */
1055         public function showRedirectedFromHeader() {
1056                 global $wgRedirectSources;
1057
1058                 $context = $this->getContext();
1059                 $outputPage = $context->getOutput();
1060                 $request = $context->getRequest();
1061                 $rdfrom = $request->getVal( 'rdfrom' );
1062
1063                 // Construct a URL for the current page view, but with the target title
1064                 $query = $request->getValues();
1065                 unset( $query['rdfrom'] );
1066                 unset( $query['title'] );
1067                 if ( $this->getTitle()->isRedirect() ) {
1068                         // Prevent double redirects
1069                         $query['redirect'] = 'no';
1070                 }
1071                 $redirectTargetUrl = $this->getTitle()->getLinkURL( $query );
1072
1073                 if ( isset( $this->mRedirectedFrom ) ) {
1074                         // Avoid PHP 7.1 warning of passing $this by reference
1075                         $articlePage = $this;
1076
1077                         // This is an internally redirected page view.
1078                         // We'll need a backlink to the source page for navigation.
1079                         if ( Hooks::run( 'ArticleViewRedirect', [ &$articlePage ] ) ) {
1080                                 $redir = Linker::linkKnown(
1081                                         $this->mRedirectedFrom,
1082                                         null,
1083                                         [],
1084                                         [ 'redirect' => 'no' ]
1085                                 );
1086
1087                                 $outputPage->addSubtitle( "<span class=\"mw-redirectedfrom\">" .
1088                                         $context->msg( 'redirectedfrom' )->rawParams( $redir )->parse()
1089                                 . "</span>" );
1090
1091                                 // Add the script to update the displayed URL and
1092                                 // set the fragment if one was specified in the redirect
1093                                 $outputPage->addJsConfigVars( [
1094                                         'wgInternalRedirectTargetUrl' => $redirectTargetUrl,
1095                                 ] );
1096                                 $outputPage->addModules( 'mediawiki.action.view.redirect' );
1097
1098                                 // Add a <link rel="canonical"> tag
1099                                 $outputPage->setCanonicalUrl( $this->getTitle()->getCanonicalURL() );
1100
1101                                 // Tell the output object that the user arrived at this article through a redirect
1102                                 $outputPage->setRedirectedFrom( $this->mRedirectedFrom );
1103
1104                                 return true;
1105                         }
1106                 } elseif ( $rdfrom ) {
1107                         // This is an externally redirected view, from some other wiki.
1108                         // If it was reported from a trusted site, supply a backlink.
1109                         if ( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
1110                                 $redir = Linker::makeExternalLink( $rdfrom, $rdfrom );
1111                                 $outputPage->addSubtitle( "<span class=\"mw-redirectedfrom\">" .
1112                                         $context->msg( 'redirectedfrom' )->rawParams( $redir )->parse()
1113                                 . "</span>" );
1114
1115                                 // Add the script to update the displayed URL
1116                                 $outputPage->addJsConfigVars( [
1117                                         'wgInternalRedirectTargetUrl' => $redirectTargetUrl,
1118                                 ] );
1119                                 $outputPage->addModules( 'mediawiki.action.view.redirect' );
1120
1121                                 return true;
1122                         }
1123                 }
1124
1125                 return false;
1126         }
1127
1128         /**
1129          * Show a header specific to the namespace currently being viewed, like
1130          * [[MediaWiki:Talkpagetext]]. For Article::view().
1131          */
1132         public function showNamespaceHeader() {
1133                 if ( $this->getTitle()->isTalkPage() ) {
1134                         if ( !wfMessage( 'talkpageheader' )->isDisabled() ) {
1135                                 $this->getContext()->getOutput()->wrapWikiMsg(
1136                                         "<div class=\"mw-talkpageheader\">\n$1\n</div>",
1137                                         [ 'talkpageheader' ]
1138                                 );
1139                         }
1140                 }
1141         }
1142
1143         /**
1144          * Show the footer section of an ordinary page view
1145          */
1146         public function showViewFooter() {
1147                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
1148                 if ( $this->getTitle()->getNamespace() == NS_USER_TALK
1149                         && IP::isValid( $this->getTitle()->getText() )
1150                 ) {
1151                         $this->getContext()->getOutput()->addWikiMsg( 'anontalkpagetext' );
1152                 }
1153
1154                 // Show a footer allowing the user to patrol the shown revision or page if possible
1155                 $patrolFooterShown = $this->showPatrolFooter();
1156
1157                 Hooks::run( 'ArticleViewFooter', [ $this, $patrolFooterShown ] );
1158         }
1159
1160         /**
1161          * If patrol is possible, output a patrol UI box. This is called from the
1162          * footer section of ordinary page views. If patrol is not possible or not
1163          * desired, does nothing.
1164          * Side effect: When the patrol link is build, this method will call
1165          * OutputPage::preventClickjacking() and load mediawiki.page.patrol.ajax.
1166          *
1167          * @return bool
1168          */
1169         public function showPatrolFooter() {
1170                 global $wgUseNPPatrol, $wgUseRCPatrol, $wgUseFilePatrol;
1171
1172                 // Allow hooks to decide whether to not output this at all
1173                 if ( !Hooks::run( 'ArticleShowPatrolFooter', [ $this ] ) ) {
1174                         return false;
1175                 }
1176
1177                 $outputPage = $this->getContext()->getOutput();
1178                 $user = $this->getContext()->getUser();
1179                 $title = $this->getTitle();
1180                 $rc = false;
1181
1182                 if ( !$title->quickUserCan( 'patrol', $user )
1183                         || !( $wgUseRCPatrol || $wgUseNPPatrol
1184                                 || ( $wgUseFilePatrol && $title->inNamespace( NS_FILE ) ) )
1185                 ) {
1186                         // Patrolling is disabled or the user isn't allowed to
1187                         return false;
1188                 }
1189
1190                 if ( $this->mRevision
1191                         && !RecentChange::isInRCLifespan( $this->mRevision->getTimestamp(), 21600 )
1192                 ) {
1193                         // The current revision is already older than what could be in the RC table
1194                         // 6h tolerance because the RC might not be cleaned out regularly
1195                         return false;
1196                 }
1197
1198                 // Check for cached results
1199                 $cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
1200                 $key = $cache->makeKey( 'unpatrollable-page', $title->getArticleID() );
1201                 if ( $cache->get( $key ) ) {
1202                         return false;
1203                 }
1204
1205                 $dbr = wfGetDB( DB_REPLICA );
1206                 $oldestRevisionTimestamp = $dbr->selectField(
1207                         'revision',
1208                         'MIN( rev_timestamp )',
1209                         [ 'rev_page' => $title->getArticleID() ],
1210                         __METHOD__
1211                 );
1212
1213                 // New page patrol: Get the timestamp of the oldest revison which
1214                 // the revision table holds for the given page. Then we look
1215                 // whether it's within the RC lifespan and if it is, we try
1216                 // to get the recentchanges row belonging to that entry
1217                 // (with rc_new = 1).
1218                 $recentPageCreation = false;
1219                 if ( $oldestRevisionTimestamp
1220                         && RecentChange::isInRCLifespan( $oldestRevisionTimestamp, 21600 )
1221                 ) {
1222                         // 6h tolerance because the RC might not be cleaned out regularly
1223                         $recentPageCreation = true;
1224                         $rc = RecentChange::newFromConds(
1225                                 [
1226                                         'rc_new' => 1,
1227                                         'rc_timestamp' => $oldestRevisionTimestamp,
1228                                         'rc_namespace' => $title->getNamespace(),
1229                                         'rc_cur_id' => $title->getArticleID()
1230                                 ],
1231                                 __METHOD__
1232                         );
1233                         if ( $rc ) {
1234                                 // Use generic patrol message for new pages
1235                                 $markPatrolledMsg = wfMessage( 'markaspatrolledtext' );
1236                         }
1237                 }
1238
1239                 // File patrol: Get the timestamp of the latest upload for this page,
1240                 // check whether it is within the RC lifespan and if it is, we try
1241                 // to get the recentchanges row belonging to that entry
1242                 // (with rc_type = RC_LOG, rc_log_type = upload).
1243                 $recentFileUpload = false;
1244                 if ( ( !$rc || $rc->getAttribute( 'rc_patrolled' ) ) && $wgUseFilePatrol
1245                         && $title->getNamespace() === NS_FILE ) {
1246                         // Retrieve timestamp of most recent upload
1247                         $newestUploadTimestamp = $dbr->selectField(
1248                                 'image',
1249                                 'MAX( img_timestamp )',
1250                                 [ 'img_name' => $title->getDBkey() ],
1251                                 __METHOD__
1252                         );
1253                         if ( $newestUploadTimestamp
1254                                 && RecentChange::isInRCLifespan( $newestUploadTimestamp, 21600 )
1255                         ) {
1256                                 // 6h tolerance because the RC might not be cleaned out regularly
1257                                 $recentFileUpload = true;
1258                                 $rc = RecentChange::newFromConds(
1259                                         [
1260                                                 'rc_type' => RC_LOG,
1261                                                 'rc_log_type' => 'upload',
1262                                                 'rc_timestamp' => $newestUploadTimestamp,
1263                                                 'rc_namespace' => NS_FILE,
1264                                                 'rc_cur_id' => $title->getArticleID()
1265                                         ],
1266                                         __METHOD__
1267                                 );
1268                                 if ( $rc ) {
1269                                         // Use patrol message specific to files
1270                                         $markPatrolledMsg = wfMessage( 'markaspatrolledtext-file' );
1271                                 }
1272                         }
1273                 }
1274
1275                 if ( !$recentPageCreation && !$recentFileUpload ) {
1276                         // Page creation and latest upload (for files) is too old to be in RC
1277
1278                         // We definitely can't patrol so cache the information
1279                         // When a new file version is uploaded, the cache is cleared
1280                         $cache->set( $key, '1' );
1281
1282                         return false;
1283                 }
1284
1285                 if ( !$rc ) {
1286                         // Don't cache: This can be hit if the page gets accessed very fast after
1287                         // its creation / latest upload or in case we have high replica DB lag. In case
1288                         // the revision is too old, we will already return above.
1289                         return false;
1290                 }
1291
1292                 if ( $rc->getAttribute( 'rc_patrolled' ) ) {
1293                         // Patrolled RC entry around
1294
1295                         // Cache the information we gathered above in case we can't patrol
1296                         // Don't cache in case we can patrol as this could change
1297                         $cache->set( $key, '1' );
1298
1299                         return false;
1300                 }
1301
1302                 if ( $rc->getPerformer()->equals( $user ) ) {
1303                         // Don't show a patrol link for own creations/uploads. If the user could
1304                         // patrol them, they already would be patrolled
1305                         return false;
1306                 }
1307
1308                 $outputPage->preventClickjacking();
1309                 if ( $user->isAllowed( 'writeapi' ) ) {
1310                         $outputPage->addModules( 'mediawiki.page.patrol.ajax' );
1311                 }
1312
1313                 $link = Linker::linkKnown(
1314                         $title,
1315                         $markPatrolledMsg->escaped(),
1316                         [],
1317                         [
1318                                 'action' => 'markpatrolled',
1319                                 'rcid' => $rc->getAttribute( 'rc_id' ),
1320                         ]
1321                 );
1322
1323                 $outputPage->addHTML(
1324                         "<div class='patrollink' data-mw='interface'>" .
1325                                 wfMessage( 'markaspatrolledlink' )->rawParams( $link )->escaped() .
1326                         '</div>'
1327                 );
1328
1329                 return true;
1330         }
1331
1332         /**
1333          * Purge the cache used to check if it is worth showing the patrol footer
1334          * For example, it is done during re-uploads when file patrol is used.
1335          * @param int $articleID ID of the article to purge
1336          * @since 1.27
1337          */
1338         public static function purgePatrolFooterCache( $articleID ) {
1339                 $cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
1340                 $cache->delete( $cache->makeKey( 'unpatrollable-page', $articleID ) );
1341         }
1342
1343         /**
1344          * Show the error text for a missing article. For articles in the MediaWiki
1345          * namespace, show the default message text. To be called from Article::view().
1346          */
1347         public function showMissingArticle() {
1348                 global $wgSend404Code;
1349
1350                 $outputPage = $this->getContext()->getOutput();
1351                 // Whether the page is a root user page of an existing user (but not a subpage)
1352                 $validUserPage = false;
1353
1354                 $title = $this->getTitle();
1355
1356                 # Show info in user (talk) namespace. Does the user exist? Is he blocked?
1357                 if ( $title->getNamespace() == NS_USER
1358                         || $title->getNamespace() == NS_USER_TALK
1359                 ) {
1360                         $rootPart = explode( '/', $title->getText() )[0];
1361                         $user = User::newFromName( $rootPart, false /* allow IP users */ );
1362                         $ip = User::isIP( $rootPart );
1363                         $block = Block::newFromTarget( $user, $user );
1364
1365                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
1366                                 $outputPage->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n\$1\n</div>",
1367                                         [ 'userpage-userdoesnotexist-view', wfEscapeWikiText( $rootPart ) ] );
1368                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
1369                                 # Show log extract if the user is currently blocked
1370                                 LogEventsList::showLogExtract(
1371                                         $outputPage,
1372                                         'block',
1373                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
1374                                         '',
1375                                         [
1376                                                 'lim' => 1,
1377                                                 'showIfEmpty' => false,
1378                                                 'msgKey' => [
1379                                                         'blocked-notice-logextract',
1380                                                         $user->getName() # Support GENDER in notice
1381                                                 ]
1382                                         ]
1383                                 );
1384                                 $validUserPage = !$title->isSubpage();
1385                         } else {
1386                                 $validUserPage = !$title->isSubpage();
1387                         }
1388                 }
1389
1390                 Hooks::run( 'ShowMissingArticle', [ $this ] );
1391
1392                 # Show delete and move logs if there were any such events.
1393                 # The logging query can DOS the site when bots/crawlers cause 404 floods,
1394                 # so be careful showing this. 404 pages must be cheap as they are hard to cache.
1395                 $cache = MediaWikiServices::getInstance()->getMainObjectStash();
1396                 $key = $cache->makeKey( 'page-recent-delete', md5( $title->getPrefixedText() ) );
1397                 $loggedIn = $this->getContext()->getUser()->isLoggedIn();
1398                 $sessionExists = $this->getContext()->getRequest()->getSession()->isPersistent();
1399                 if ( $loggedIn || $cache->get( $key ) || $sessionExists ) {
1400                         $logTypes = [ 'delete', 'move', 'protect' ];
1401
1402                         $dbr = wfGetDB( DB_REPLICA );
1403
1404                         $conds = [ 'log_action != ' . $dbr->addQuotes( 'revision' ) ];
1405                         // Give extensions a chance to hide their (unrelated) log entries
1406                         Hooks::run( 'Article::MissingArticleConditions', [ &$conds, $logTypes ] );
1407                         LogEventsList::showLogExtract(
1408                                 $outputPage,
1409                                 $logTypes,
1410                                 $title,
1411                                 '',
1412                                 [
1413                                         'lim' => 10,
1414                                         'conds' => $conds,
1415                                         'showIfEmpty' => false,
1416                                         'msgKey' => [ $loggedIn || $sessionExists
1417                                                 ? 'moveddeleted-notice'
1418                                                 : 'moveddeleted-notice-recent'
1419                                         ]
1420                                 ]
1421                         );
1422                 }
1423
1424                 if ( !$this->mPage->hasViewableContent() && $wgSend404Code && !$validUserPage ) {
1425                         // If there's no backing content, send a 404 Not Found
1426                         // for better machine handling of broken links.
1427                         $this->getContext()->getRequest()->response()->statusHeader( 404 );
1428                 }
1429
1430                 // Also apply the robot policy for nonexisting pages (even if a 404 was used for sanity)
1431                 $policy = $this->getRobotPolicy( 'view' );
1432                 $outputPage->setIndexPolicy( $policy['index'] );
1433                 $outputPage->setFollowPolicy( $policy['follow'] );
1434
1435                 $hookResult = Hooks::run( 'BeforeDisplayNoArticleText', [ $this ] );
1436
1437                 if ( !$hookResult ) {
1438                         return;
1439                 }
1440
1441                 # Show error message
1442                 $oldid = $this->getOldID();
1443                 if ( !$oldid && $title->getNamespace() === NS_MEDIAWIKI && $title->hasSourceText() ) {
1444                         // use fake Content object for system message
1445                         $parserOptions = ParserOptions::newCanonical( 'canonical' );
1446                         $outputPage->addParserOutput( $this->getEmptyPageParserOutput( $parserOptions ) );
1447                 } else {
1448                         if ( $oldid ) {
1449                                 $text = wfMessage( 'missing-revision', $oldid )->plain();
1450                         } elseif ( $title->quickUserCan( 'create', $this->getContext()->getUser() )
1451                                 && $title->quickUserCan( 'edit', $this->getContext()->getUser() )
1452                         ) {
1453                                 $message = $this->getContext()->getUser()->isLoggedIn() ? 'noarticletext' : 'noarticletextanon';
1454                                 $text = wfMessage( $message )->plain();
1455                         } else {
1456                                 $text = wfMessage( 'noarticletext-nopermission' )->plain();
1457                         }
1458
1459                         $dir = $this->getContext()->getLanguage()->getDir();
1460                         $lang = $this->getContext()->getLanguage()->getHtmlCode();
1461                         $outputPage->addWikiText( Xml::openElement( 'div', [
1462                                 'class' => "noarticletext mw-content-$dir",
1463                                 'dir' => $dir,
1464                                 'lang' => $lang,
1465                         ] ) . "\n$text\n</div>" );
1466                 }
1467         }
1468
1469         /**
1470          * If the revision requested for view is deleted, check permissions.
1471          * Send either an error message or a warning header to the output.
1472          *
1473          * @return bool True if the view is allowed, false if not.
1474          */
1475         public function showDeletedRevisionHeader() {
1476                 if ( !$this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1477                         // Not deleted
1478                         return true;
1479                 }
1480
1481                 $outputPage = $this->getContext()->getOutput();
1482                 $user = $this->getContext()->getUser();
1483                 // If the user is not allowed to see it...
1484                 if ( !$this->mRevision->userCan( Revision::DELETED_TEXT, $user ) ) {
1485                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1486                                 'rev-deleted-text-permission' );
1487
1488                         return false;
1489                 // If the user needs to confirm that they want to see it...
1490                 } elseif ( $this->getContext()->getRequest()->getInt( 'unhide' ) != 1 ) {
1491                         # Give explanation and add a link to view the revision...
1492                         $oldid = intval( $this->getOldID() );
1493                         $link = $this->getTitle()->getFullURL( "oldid={$oldid}&unhide=1" );
1494                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1495                                 'rev-suppressed-text-unhide' : 'rev-deleted-text-unhide';
1496                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1497                                 [ $msg, $link ] );
1498
1499                         return false;
1500                 // We are allowed to see...
1501                 } else {
1502                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1503                                 'rev-suppressed-text-view' : 'rev-deleted-text-view';
1504                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", $msg );
1505
1506                         return true;
1507                 }
1508         }
1509
1510         /**
1511          * Generate the navigation links when browsing through an article revisions
1512          * It shows the information as:
1513          *   Revision as of \<date\>; view current revision
1514          *   \<- Previous version | Next Version -\>
1515          *
1516          * @param int $oldid Revision ID of this article revision
1517          */
1518         public function setOldSubtitle( $oldid = 0 ) {
1519                 // Avoid PHP 7.1 warning of passing $this by reference
1520                 $articlePage = $this;
1521
1522                 if ( !Hooks::run( 'DisplayOldSubtitle', [ &$articlePage, &$oldid ] ) ) {
1523                         return;
1524                 }
1525
1526                 $context = $this->getContext();
1527                 $unhide = $context->getRequest()->getInt( 'unhide' ) == 1;
1528
1529                 # Cascade unhide param in links for easy deletion browsing
1530                 $extraParams = [];
1531                 if ( $unhide ) {
1532                         $extraParams['unhide'] = 1;
1533                 }
1534
1535                 if ( $this->mRevision && $this->mRevision->getId() === $oldid ) {
1536                         $revision = $this->mRevision;
1537                 } else {
1538                         $revision = Revision::newFromId( $oldid );
1539                 }
1540
1541                 $timestamp = $revision->getTimestamp();
1542
1543                 $current = ( $oldid == $this->mPage->getLatest() );
1544                 $language = $context->getLanguage();
1545                 $user = $context->getUser();
1546
1547                 $td = $language->userTimeAndDate( $timestamp, $user );
1548                 $tddate = $language->userDate( $timestamp, $user );
1549                 $tdtime = $language->userTime( $timestamp, $user );
1550
1551                 # Show user links if allowed to see them. If hidden, then show them only if requested...
1552                 $userlinks = Linker::revUserTools( $revision, !$unhide );
1553
1554                 $infomsg = $current && !$context->msg( 'revision-info-current' )->isDisabled()
1555                         ? 'revision-info-current'
1556                         : 'revision-info';
1557
1558                 $outputPage = $context->getOutput();
1559                 $revisionInfo = "<div id=\"mw-{$infomsg}\">" .
1560                         $context->msg( $infomsg, $td )
1561                                 ->rawParams( $userlinks )
1562                                 ->params( $revision->getId(), $tddate, $tdtime, $revision->getUserText() )
1563                                 ->rawParams( Linker::revComment( $revision, true, true ) )
1564                                 ->parse() .
1565                         "</div>";
1566
1567                 $lnk = $current
1568                         ? $context->msg( 'currentrevisionlink' )->escaped()
1569                         : Linker::linkKnown(
1570                                 $this->getTitle(),
1571                                 $context->msg( 'currentrevisionlink' )->escaped(),
1572                                 [],
1573                                 $extraParams
1574                         );
1575                 $curdiff = $current
1576                         ? $context->msg( 'diff' )->escaped()
1577                         : Linker::linkKnown(
1578                                 $this->getTitle(),
1579                                 $context->msg( 'diff' )->escaped(),
1580                                 [],
1581                                 [
1582                                         'diff' => 'cur',
1583                                         'oldid' => $oldid
1584                                 ] + $extraParams
1585                         );
1586                 $prev = $this->getTitle()->getPreviousRevisionID( $oldid );
1587                 $prevlink = $prev
1588                         ? Linker::linkKnown(
1589                                 $this->getTitle(),
1590                                 $context->msg( 'previousrevision' )->escaped(),
1591                                 [],
1592                                 [
1593                                         'direction' => 'prev',
1594                                         'oldid' => $oldid
1595                                 ] + $extraParams
1596                         )
1597                         : $context->msg( 'previousrevision' )->escaped();
1598                 $prevdiff = $prev
1599                         ? Linker::linkKnown(
1600                                 $this->getTitle(),
1601                                 $context->msg( 'diff' )->escaped(),
1602                                 [],
1603                                 [
1604                                         'diff' => 'prev',
1605                                         'oldid' => $oldid
1606                                 ] + $extraParams
1607                         )
1608                         : $context->msg( 'diff' )->escaped();
1609                 $nextlink = $current
1610                         ? $context->msg( 'nextrevision' )->escaped()
1611                         : Linker::linkKnown(
1612                                 $this->getTitle(),
1613                                 $context->msg( 'nextrevision' )->escaped(),
1614                                 [],
1615                                 [
1616                                         'direction' => 'next',
1617                                         'oldid' => $oldid
1618                                 ] + $extraParams
1619                         );
1620                 $nextdiff = $current
1621                         ? $context->msg( 'diff' )->escaped()
1622                         : Linker::linkKnown(
1623                                 $this->getTitle(),
1624                                 $context->msg( 'diff' )->escaped(),
1625                                 [],
1626                                 [
1627                                         'diff' => 'next',
1628                                         'oldid' => $oldid
1629                                 ] + $extraParams
1630                         );
1631
1632                 $cdel = Linker::getRevDeleteLink( $user, $revision, $this->getTitle() );
1633                 if ( $cdel !== '' ) {
1634                         $cdel .= ' ';
1635                 }
1636
1637                 // the outer div is need for styling the revision info and nav in MobileFrontend
1638                 $outputPage->addSubtitle( "<div class=\"mw-revision\">" . $revisionInfo .
1639                         "<div id=\"mw-revision-nav\">" . $cdel .
1640                         $context->msg( 'revision-nav' )->rawParams(
1641                                 $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff
1642                         )->escaped() . "</div></div>" );
1643         }
1644
1645         /**
1646          * Return the HTML for the top of a redirect page
1647          *
1648          * Chances are you should just be using the ParserOutput from
1649          * WikitextContent::getParserOutput instead of calling this for redirects.
1650          *
1651          * @param Title|array $target Destination(s) to redirect
1652          * @param bool $appendSubtitle [optional]
1653          * @param bool $forceKnown Should the image be shown as a bluelink regardless of existence?
1654          * @return string Containing HTML with redirect link
1655          *
1656          * @deprecated since 1.30
1657          */
1658         public function viewRedirect( $target, $appendSubtitle = true, $forceKnown = false ) {
1659                 $lang = $this->getTitle()->getPageLanguage();
1660                 $out = $this->getContext()->getOutput();
1661                 if ( $appendSubtitle ) {
1662                         $out->addSubtitle( wfMessage( 'redirectpagesub' ) );
1663                 }
1664                 $out->addModuleStyles( 'mediawiki.action.view.redirectPage' );
1665                 return static::getRedirectHeaderHtml( $lang, $target, $forceKnown );
1666         }
1667
1668         /**
1669          * Return the HTML for the top of a redirect page
1670          *
1671          * Chances are you should just be using the ParserOutput from
1672          * WikitextContent::getParserOutput instead of calling this for redirects.
1673          *
1674          * @since 1.23
1675          * @param Language $lang
1676          * @param Title|array $target Destination(s) to redirect
1677          * @param bool $forceKnown Should the image be shown as a bluelink regardless of existence?
1678          * @return string Containing HTML with redirect link
1679          */
1680         public static function getRedirectHeaderHtml( Language $lang, $target, $forceKnown = false ) {
1681                 if ( !is_array( $target ) ) {
1682                         $target = [ $target ];
1683                 }
1684
1685                 $html = '<ul class="redirectText">';
1686                 /** @var Title $title */
1687                 foreach ( $target as $title ) {
1688                         $html .= '<li>' . Linker::link(
1689                                 $title,
1690                                 htmlspecialchars( $title->getFullText() ),
1691                                 [],
1692                                 // Make sure wiki page redirects are not followed
1693                                 $title->isRedirect() ? [ 'redirect' => 'no' ] : [],
1694                                 ( $forceKnown ? [ 'known', 'noclasses' ] : [] )
1695                         ) . '</li>';
1696                 }
1697                 $html .= '</ul>';
1698
1699                 $redirectToText = wfMessage( 'redirectto' )->inLanguage( $lang )->escaped();
1700
1701                 return '<div class="redirectMsg">' .
1702                         '<p>' . $redirectToText . '</p>' .
1703                         $html .
1704                         '</div>';
1705         }
1706
1707         /**
1708          * Adds help link with an icon via page indicators.
1709          * Link target can be overridden by a local message containing a wikilink:
1710          * the message key is: 'namespace-' + namespace number + '-helppage'.
1711          * @param string $to Target MediaWiki.org page title or encoded URL.
1712          * @param bool $overrideBaseUrl Whether $url is a full URL, to avoid MW.o.
1713          * @since 1.25
1714          */
1715         public function addHelpLink( $to, $overrideBaseUrl = false ) {
1716                 $msg = wfMessage(
1717                         'namespace-' . $this->getTitle()->getNamespace() . '-helppage'
1718                 );
1719
1720                 $out = $this->getContext()->getOutput();
1721                 if ( !$msg->isDisabled() ) {
1722                         $helpUrl = Skin::makeUrl( $msg->plain() );
1723                         $out->addHelpLink( $helpUrl, true );
1724                 } else {
1725                         $out->addHelpLink( $to, $overrideBaseUrl );
1726                 }
1727         }
1728
1729         /**
1730          * Handle action=render
1731          */
1732         public function render() {
1733                 $this->getContext()->getRequest()->response()->header( 'X-Robots-Tag: noindex' );
1734                 $this->getContext()->getOutput()->setArticleBodyOnly( true );
1735                 $this->disableSectionEditForRender = true;
1736                 $this->view();
1737         }
1738
1739         /**
1740          * action=protect handler
1741          */
1742         public function protect() {
1743                 $form = new ProtectionForm( $this );
1744                 $form->execute();
1745         }
1746
1747         /**
1748          * action=unprotect handler (alias)
1749          */
1750         public function unprotect() {
1751                 $this->protect();
1752         }
1753
1754         /**
1755          * UI entry point for page deletion
1756          */
1757         public function delete() {
1758                 # This code desperately needs to be totally rewritten
1759
1760                 $title = $this->getTitle();
1761                 $context = $this->getContext();
1762                 $user = $context->getUser();
1763                 $request = $context->getRequest();
1764
1765                 # Check permissions
1766                 $permissionErrors = $title->getUserPermissionsErrors( 'delete', $user );
1767                 if ( count( $permissionErrors ) ) {
1768                         throw new PermissionsError( 'delete', $permissionErrors );
1769                 }
1770
1771                 # Read-only check...
1772                 if ( wfReadOnly() ) {
1773                         throw new ReadOnlyError;
1774                 }
1775
1776                 # Better double-check that it hasn't been deleted yet!
1777                 $this->mPage->loadPageData(
1778                         $request->wasPosted() ? WikiPage::READ_LATEST : WikiPage::READ_NORMAL
1779                 );
1780                 if ( !$this->mPage->exists() ) {
1781                         $deleteLogPage = new LogPage( 'delete' );
1782                         $outputPage = $context->getOutput();
1783                         $outputPage->setPageTitle( $context->msg( 'cannotdelete-title', $title->getPrefixedText() ) );
1784                         $outputPage->wrapWikiMsg( "<div class=\"error mw-error-cannotdelete\">\n$1\n</div>",
1785                                         [ 'cannotdelete', wfEscapeWikiText( $title->getPrefixedText() ) ]
1786                                 );
1787                         $outputPage->addHTML(
1788                                 Xml::element( 'h2', null, $deleteLogPage->getName()->text() )
1789                         );
1790                         LogEventsList::showLogExtract(
1791                                 $outputPage,
1792                                 'delete',
1793                                 $title
1794                         );
1795
1796                         return;
1797                 }
1798
1799                 $deleteReasonList = $request->getText( 'wpDeleteReasonList', 'other' );
1800                 $deleteReason = $request->getText( 'wpReason' );
1801
1802                 if ( $deleteReasonList == 'other' ) {
1803                         $reason = $deleteReason;
1804                 } elseif ( $deleteReason != '' ) {
1805                         // Entry from drop down menu + additional comment
1806                         $colonseparator = wfMessage( 'colon-separator' )->inContentLanguage()->text();
1807                         $reason = $deleteReasonList . $colonseparator . $deleteReason;
1808                 } else {
1809                         $reason = $deleteReasonList;
1810                 }
1811
1812                 if ( $request->wasPosted() && $user->matchEditToken( $request->getVal( 'wpEditToken' ),
1813                         [ 'delete', $this->getTitle()->getPrefixedText() ] )
1814                 ) {
1815                         # Flag to hide all contents of the archived revisions
1816                         $suppress = $request->getCheck( 'wpSuppress' ) && $user->isAllowed( 'suppressrevision' );
1817
1818                         $this->doDelete( $reason, $suppress );
1819
1820                         WatchAction::doWatchOrUnwatch( $request->getCheck( 'wpWatch' ), $title, $user );
1821
1822                         return;
1823                 }
1824
1825                 // Generate deletion reason
1826                 $hasHistory = false;
1827                 if ( !$reason ) {
1828                         try {
1829                                 $reason = $this->generateReason( $hasHistory );
1830                         } catch ( Exception $e ) {
1831                                 # if a page is horribly broken, we still want to be able to
1832                                 # delete it. So be lenient about errors here.
1833                                 wfDebug( "Error while building auto delete summary: $e" );
1834                                 $reason = '';
1835                         }
1836                 }
1837
1838                 // If the page has a history, insert a warning
1839                 if ( $hasHistory ) {
1840                         $title = $this->getTitle();
1841
1842                         // The following can use the real revision count as this is only being shown for users
1843                         // that can delete this page.
1844                         // This, as a side-effect, also makes sure that the following query isn't being run for
1845                         // pages with a larger history, unless the user has the 'bigdelete' right
1846                         // (and is about to delete this page).
1847                         $dbr = wfGetDB( DB_REPLICA );
1848                         $revisions = $edits = (int)$dbr->selectField(
1849                                 'revision',
1850                                 'COUNT(rev_page)',
1851                                 [ 'rev_page' => $title->getArticleID() ],
1852                                 __METHOD__
1853                         );
1854
1855                         // @todo i18n issue/patchwork message
1856                         $context->getOutput()->addHTML(
1857                                 '<strong class="mw-delete-warning-revisions">' .
1858                                 $context->msg( 'historywarning' )->numParams( $revisions )->parse() .
1859                                 $context->msg( 'word-separator' )->escaped() . Linker::linkKnown( $title,
1860                                         $context->msg( 'history' )->escaped(),
1861                                         [],
1862                                         [ 'action' => 'history' ] ) .
1863                                 '</strong>'
1864                         );
1865
1866                         if ( $title->isBigDeletion() ) {
1867                                 global $wgDeleteRevisionsLimit;
1868                                 $context->getOutput()->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
1869                                         [
1870                                                 'delete-warning-toobig',
1871                                                 $context->getLanguage()->formatNum( $wgDeleteRevisionsLimit )
1872                                         ]
1873                                 );
1874                         }
1875                 }
1876
1877                 $this->confirmDelete( $reason );
1878         }
1879
1880         /**
1881          * Output deletion confirmation dialog
1882          * @todo Move to another file?
1883          * @param string $reason Prefilled reason
1884          */
1885         public function confirmDelete( $reason ) {
1886                 wfDebug( "Article::confirmDelete\n" );
1887
1888                 $title = $this->getTitle();
1889                 $ctx = $this->getContext();
1890                 $outputPage = $ctx->getOutput();
1891                 $outputPage->setPageTitle( wfMessage( 'delete-confirm', $title->getPrefixedText() ) );
1892                 $outputPage->addBacklinkSubtitle( $title );
1893                 $outputPage->setRobotPolicy( 'noindex,nofollow' );
1894                 $outputPage->addModules( 'mediawiki.action.delete' );
1895
1896                 $backlinkCache = $title->getBacklinkCache();
1897                 if ( $backlinkCache->hasLinks( 'pagelinks' ) || $backlinkCache->hasLinks( 'templatelinks' ) ) {
1898                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1899                                 'deleting-backlinks-warning' );
1900                 }
1901
1902                 $subpageQueryLimit = 51;
1903                 $subpages = $title->getSubpages( $subpageQueryLimit );
1904                 $subpageCount = count( $subpages );
1905                 if ( $subpageCount > 0 ) {
1906                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1907                                 [ 'deleting-subpages-warning', Message::numParam( $subpageCount ) ] );
1908                 }
1909                 $outputPage->addWikiMsg( 'confirmdeletetext' );
1910
1911                 Hooks::run( 'ArticleConfirmDelete', [ $this, $outputPage, &$reason ] );
1912
1913                 $user = $this->getContext()->getUser();
1914                 $checkWatch = $user->getBoolOption( 'watchdeletion' ) || $user->isWatched( $title );
1915
1916                 $outputPage->enableOOUI();
1917
1918                 $options = Xml::listDropDownOptions(
1919                         $ctx->msg( 'deletereason-dropdown' )->inContentLanguage()->text(),
1920                         [ 'other' => $ctx->msg( 'deletereasonotherlist' )->inContentLanguage()->text() ]
1921                 );
1922                 $options = Xml::listDropDownOptionsOoui( $options );
1923
1924                 $fields[] = new OOUI\FieldLayout(
1925                         new OOUI\DropdownInputWidget( [
1926                                 'name' => 'wpDeleteReasonList',
1927                                 'inputId' => 'wpDeleteReasonList',
1928                                 'tabIndex' => 1,
1929                                 'infusable' => true,
1930                                 'value' => '',
1931                                 'options' => $options
1932                         ] ),
1933                         [
1934                                 'label' => $ctx->msg( 'deletecomment' )->text(),
1935                                 'align' => 'top',
1936                         ]
1937                 );
1938
1939                 // HTML maxlength uses "UTF-16 code units", which means that characters outside BMP
1940                 // (e.g. emojis) count for two each. This limit is overridden in JS to instead count
1941                 // Unicode codepoints (or 255 UTF-8 bytes for old schema).
1942                 $conf = $this->getContext()->getConfig();
1943                 $oldCommentSchema = $conf->get( 'CommentTableSchemaMigrationStage' ) === MIGRATION_OLD;
1944                 $fields[] = new OOUI\FieldLayout(
1945                         new OOUI\TextInputWidget( [
1946                                 'name' => 'wpReason',
1947                                 'inputId' => 'wpReason',
1948                                 'tabIndex' => 2,
1949                                 'maxLength' => $oldCommentSchema ? 255 : CommentStore::COMMENT_CHARACTER_LIMIT,
1950                                 'infusable' => true,
1951                                 'value' => $reason,
1952                                 'autofocus' => true,
1953                         ] ),
1954                         [
1955                                 'label' => $ctx->msg( 'deleteotherreason' )->text(),
1956                                 'align' => 'top',
1957                         ]
1958                 );
1959
1960                 if ( $user->isLoggedIn() ) {
1961                         $fields[] = new OOUI\FieldLayout(
1962                                 new OOUI\CheckboxInputWidget( [
1963                                         'name' => 'wpWatch',
1964                                         'inputId' => 'wpWatch',
1965                                         'tabIndex' => 3,
1966                                         'selected' => $checkWatch,
1967                                 ] ),
1968                                 [
1969                                         'label' => $ctx->msg( 'watchthis' )->text(),
1970                                         'align' => 'inline',
1971                                         'infusable' => true,
1972                                 ]
1973                         );
1974                 }
1975
1976                 if ( $user->isAllowed( 'suppressrevision' ) ) {
1977                         $fields[] = new OOUI\FieldLayout(
1978                                 new OOUI\CheckboxInputWidget( [
1979                                         'name' => 'wpSuppress',
1980                                         'inputId' => 'wpSuppress',
1981                                         'tabIndex' => 4,
1982                                 ] ),
1983                                 [
1984                                         'label' => $ctx->msg( 'revdelete-suppress' )->text(),
1985                                         'align' => 'inline',
1986                                         'infusable' => true,
1987                                 ]
1988                         );
1989                 }
1990
1991                 $fields[] = new OOUI\FieldLayout(
1992                         new OOUI\ButtonInputWidget( [
1993                                 'name' => 'wpConfirmB',
1994                                 'inputId' => 'wpConfirmB',
1995                                 'tabIndex' => 5,
1996                                 'value' => $ctx->msg( 'deletepage' )->text(),
1997                                 'label' => $ctx->msg( 'deletepage' )->text(),
1998                                 'flags' => [ 'primary', 'destructive' ],
1999                                 'type' => 'submit',
2000                         ] ),
2001                         [
2002                                 'align' => 'top',
2003                         ]
2004                 );
2005
2006                 $fieldset = new OOUI\FieldsetLayout( [
2007                         'label' => $ctx->msg( 'delete-legend' )->text(),
2008                         'id' => 'mw-delete-table',
2009                         'items' => $fields,
2010                 ] );
2011
2012                 $form = new OOUI\FormLayout( [
2013                         'method' => 'post',
2014                         'action' => $title->getLocalURL( 'action=delete' ),
2015                         'id' => 'deleteconfirm',
2016                 ] );
2017                 $form->appendContent(
2018                         $fieldset,
2019                         new OOUI\HtmlSnippet(
2020                                 Html::hidden( 'wpEditToken', $user->getEditToken( [ 'delete', $title->getPrefixedText() ] ) )
2021                         )
2022                 );
2023
2024                 $outputPage->addHTML(
2025                         new OOUI\PanelLayout( [
2026                                 'classes' => [ 'deletepage-wrapper' ],
2027                                 'expanded' => false,
2028                                 'padded' => true,
2029                                 'framed' => true,
2030                                 'content' => $form,
2031                         ] )
2032                 );
2033
2034                 if ( $user->isAllowed( 'editinterface' ) ) {
2035                         $link = Linker::linkKnown(
2036                                 $ctx->msg( 'deletereason-dropdown' )->inContentLanguage()->getTitle(),
2037                                 wfMessage( 'delete-edit-reasonlist' )->escaped(),
2038                                 [],
2039                                 [ 'action' => 'edit' ]
2040                         );
2041                         $outputPage->addHTML( '<p class="mw-delete-editreasons">' . $link . '</p>' );
2042                 }
2043
2044                 $deleteLogPage = new LogPage( 'delete' );
2045                 $outputPage->addHTML( Xml::element( 'h2', null, $deleteLogPage->getName()->text() ) );
2046                 LogEventsList::showLogExtract( $outputPage, 'delete', $title );
2047         }
2048
2049         /**
2050          * Perform a deletion and output success or failure messages
2051          * @param string $reason
2052          * @param bool $suppress
2053          */
2054         public function doDelete( $reason, $suppress = false ) {
2055                 $error = '';
2056                 $context = $this->getContext();
2057                 $outputPage = $context->getOutput();
2058                 $user = $context->getUser();
2059                 $status = $this->mPage->doDeleteArticleReal( $reason, $suppress, 0, true, $error, $user );
2060
2061                 if ( $status->isGood() ) {
2062                         $deleted = $this->getTitle()->getPrefixedText();
2063
2064                         $outputPage->setPageTitle( wfMessage( 'actioncomplete' ) );
2065                         $outputPage->setRobotPolicy( 'noindex,nofollow' );
2066
2067                         $loglink = '[[Special:Log/delete|' . wfMessage( 'deletionlog' )->text() . ']]';
2068
2069                         $outputPage->addWikiMsg( 'deletedtext', wfEscapeWikiText( $deleted ), $loglink );
2070
2071                         Hooks::run( 'ArticleDeleteAfterSuccess', [ $this->getTitle(), $outputPage ] );
2072
2073                         $outputPage->returnToMain( false );
2074                 } else {
2075                         $outputPage->setPageTitle(
2076                                 wfMessage( 'cannotdelete-title',
2077                                         $this->getTitle()->getPrefixedText() )
2078                         );
2079
2080                         if ( $error == '' ) {
2081                                 $outputPage->addWikiText(
2082                                         "<div class=\"error mw-error-cannotdelete\">\n" . $status->getWikiText() . "\n</div>"
2083                                 );
2084                                 $deleteLogPage = new LogPage( 'delete' );
2085                                 $outputPage->addHTML( Xml::element( 'h2', null, $deleteLogPage->getName()->text() ) );
2086
2087                                 LogEventsList::showLogExtract(
2088                                         $outputPage,
2089                                         'delete',
2090                                         $this->getTitle()
2091                                 );
2092                         } else {
2093                                 $outputPage->addHTML( $error );
2094                         }
2095                 }
2096         }
2097
2098         /* Caching functions */
2099
2100         /**
2101          * checkLastModified returns true if it has taken care of all
2102          * output to the client that is necessary for this request.
2103          * (that is, it has sent a cached version of the page)
2104          *
2105          * @return bool True if cached version send, false otherwise
2106          */
2107         protected function tryFileCache() {
2108                 static $called = false;
2109
2110                 if ( $called ) {
2111                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
2112                         return false;
2113                 }
2114
2115                 $called = true;
2116                 if ( $this->isFileCacheable() ) {
2117                         $cache = new HTMLFileCache( $this->getTitle(), 'view' );
2118                         if ( $cache->isCacheGood( $this->mPage->getTouched() ) ) {
2119                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
2120                                 $cache->loadFromFileCache( $this->getContext() );
2121                                 return true;
2122                         } else {
2123                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
2124                                 ob_start( [ &$cache, 'saveToFileCache' ] );
2125                         }
2126                 } else {
2127                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
2128                 }
2129
2130                 return false;
2131         }
2132
2133         /**
2134          * Check if the page can be cached
2135          * @param int $mode One of the HTMLFileCache::MODE_* constants (since 1.28)
2136          * @return bool
2137          */
2138         public function isFileCacheable( $mode = HTMLFileCache::MODE_NORMAL ) {
2139                 $cacheable = false;
2140
2141                 if ( HTMLFileCache::useFileCache( $this->getContext(), $mode ) ) {
2142                         $cacheable = $this->mPage->getId()
2143                                 && !$this->mRedirectedFrom && !$this->getTitle()->isRedirect();
2144                         // Extension may have reason to disable file caching on some pages.
2145                         if ( $cacheable ) {
2146                                 // Avoid PHP 7.1 warning of passing $this by reference
2147                                 $articlePage = $this;
2148                                 $cacheable = Hooks::run( 'IsFileCacheable', [ &$articlePage ] );
2149                         }
2150                 }
2151
2152                 return $cacheable;
2153         }
2154
2155         /**#@-*/
2156
2157         /**
2158          * Lightweight method to get the parser output for a page, checking the parser cache
2159          * and so on. Doesn't consider most of the stuff that Article::view() is forced to
2160          * consider, so it's not appropriate to use there.
2161          *
2162          * @since 1.16 (r52326) for LiquidThreads
2163          *
2164          * @param int|null $oldid Revision ID or null
2165          * @param User|null $user The relevant user
2166          * @return ParserOutput|bool ParserOutput or false if the given revision ID is not found
2167          */
2168         public function getParserOutput( $oldid = null, User $user = null ) {
2169                 // XXX: bypasses mParserOptions and thus setParserOptions()
2170
2171                 if ( $user === null ) {
2172                         $parserOptions = $this->getParserOptions();
2173                 } else {
2174                         $parserOptions = $this->mPage->makeParserOptions( $user );
2175                 }
2176
2177                 return $this->mPage->getParserOutput( $parserOptions, $oldid );
2178         }
2179
2180         /**
2181          * Override the ParserOptions used to render the primary article wikitext.
2182          *
2183          * @param ParserOptions $options
2184          * @throws MWException If the parser options where already initialized.
2185          */
2186         public function setParserOptions( ParserOptions $options ) {
2187                 if ( $this->mParserOptions ) {
2188                         throw new MWException( "can't change parser options after they have already been set" );
2189                 }
2190
2191                 // clone, so if $options is modified later, it doesn't confuse the parser cache.
2192                 $this->mParserOptions = clone $options;
2193         }
2194
2195         /**
2196          * Get parser options suitable for rendering the primary article wikitext
2197          * @return ParserOptions
2198          */
2199         public function getParserOptions() {
2200                 if ( !$this->mParserOptions ) {
2201                         $this->mParserOptions = $this->mPage->makeParserOptions( $this->getContext() );
2202                 }
2203                 // Clone to allow modifications of the return value without affecting cache
2204                 return clone $this->mParserOptions;
2205         }
2206
2207         /**
2208          * Sets the context this Article is executed in
2209          *
2210          * @param IContextSource $context
2211          * @since 1.18
2212          */
2213         public function setContext( $context ) {
2214                 $this->mContext = $context;
2215         }
2216
2217         /**
2218          * Gets the context this Article is executed in
2219          *
2220          * @return IContextSource
2221          * @since 1.18
2222          */
2223         public function getContext() {
2224                 if ( $this->mContext instanceof IContextSource ) {
2225                         return $this->mContext;
2226                 } else {
2227                         wfDebug( __METHOD__ . " called and \$mContext is null. " .
2228                                 "Return RequestContext::getMain(); for sanity\n" );
2229                         return RequestContext::getMain();
2230                 }
2231         }
2232
2233         /**
2234          * Use PHP's magic __get handler to handle accessing of
2235          * raw WikiPage fields for backwards compatibility.
2236          *
2237          * @param string $fname Field name
2238          * @return mixed
2239          */
2240         public function __get( $fname ) {
2241                 if ( property_exists( $this->mPage, $fname ) ) {
2242                         # wfWarn( "Access to raw $fname field " . __CLASS__ );
2243                         return $this->mPage->$fname;
2244                 }
2245                 trigger_error( 'Inaccessible property via __get(): ' . $fname, E_USER_NOTICE );
2246         }
2247
2248         /**
2249          * Use PHP's magic __set handler to handle setting of
2250          * raw WikiPage fields for backwards compatibility.
2251          *
2252          * @param string $fname Field name
2253          * @param mixed $fvalue New value
2254          */
2255         public function __set( $fname, $fvalue ) {
2256                 if ( property_exists( $this->mPage, $fname ) ) {
2257                         # wfWarn( "Access to raw $fname field of " . __CLASS__ );
2258                         $this->mPage->$fname = $fvalue;
2259                 // Note: extensions may want to toss on new fields
2260                 } elseif ( !in_array( $fname, [ 'mContext', 'mPage' ] ) ) {
2261                         $this->mPage->$fname = $fvalue;
2262                 } else {
2263                         trigger_error( 'Inaccessible property via __set(): ' . $fname, E_USER_NOTICE );
2264                 }
2265         }
2266
2267         /**
2268          * Call to WikiPage function for backwards compatibility.
2269          * @see WikiPage::checkFlags
2270          */
2271         public function checkFlags( $flags ) {
2272                 return $this->mPage->checkFlags( $flags );
2273         }
2274
2275         /**
2276          * Call to WikiPage function for backwards compatibility.
2277          * @see WikiPage::checkTouched
2278          */
2279         public function checkTouched() {
2280                 return $this->mPage->checkTouched();
2281         }
2282
2283         /**
2284          * Call to WikiPage function for backwards compatibility.
2285          * @see WikiPage::clearPreparedEdit
2286          */
2287         public function clearPreparedEdit() {
2288                 $this->mPage->clearPreparedEdit();
2289         }
2290
2291         /**
2292          * Call to WikiPage function for backwards compatibility.
2293          * @see WikiPage::doDeleteArticleReal
2294          */
2295         public function doDeleteArticleReal(
2296                 $reason, $suppress = false, $u1 = null, $u2 = null, &$error = '', User $user = null,
2297                 $tags = []
2298         ) {
2299                 return $this->mPage->doDeleteArticleReal(
2300                         $reason, $suppress, $u1, $u2, $error, $user, $tags
2301                 );
2302         }
2303
2304         /**
2305          * Call to WikiPage function for backwards compatibility.
2306          * @see WikiPage::doDeleteUpdates
2307          */
2308         public function doDeleteUpdates(
2309                 $id,
2310                 Content $content = null,
2311                 $revision = null,
2312                 User $user = null
2313         ) {
2314                 $this->mPage->doDeleteUpdates( $id, $content, $revision, $user );
2315         }
2316
2317         /**
2318          * Call to WikiPage function for backwards compatibility.
2319          * @deprecated since 1.29. Use WikiPage::doEditContent() directly instead
2320          * @see WikiPage::doEditContent
2321          */
2322         public function doEditContent( Content $content, $summary, $flags = 0, $originalRevId = false,
2323                 User $user = null, $serialFormat = null
2324         ) {
2325                 wfDeprecated( __METHOD__, '1.29' );
2326                 return $this->mPage->doEditContent( $content, $summary, $flags, $originalRevId,
2327                         $user, $serialFormat
2328                 );
2329         }
2330
2331         /**
2332          * Call to WikiPage function for backwards compatibility.
2333          * @see WikiPage::doEditUpdates
2334          */
2335         public function doEditUpdates( Revision $revision, User $user, array $options = [] ) {
2336                 return $this->mPage->doEditUpdates( $revision, $user, $options );
2337         }
2338
2339         /**
2340          * Call to WikiPage function for backwards compatibility.
2341          * @see WikiPage::doPurge
2342          * @note In 1.28 (and only 1.28), this took a $flags parameter that
2343          *  controlled how much purging was done.
2344          */
2345         public function doPurge() {
2346                 return $this->mPage->doPurge();
2347         }
2348
2349         /**
2350          * Call to WikiPage function for backwards compatibility.
2351          * @see WikiPage::doViewUpdates
2352          */
2353         public function doViewUpdates( User $user, $oldid = 0 ) {
2354                 $this->mPage->doViewUpdates( $user, $oldid );
2355         }
2356
2357         /**
2358          * Call to WikiPage function for backwards compatibility.
2359          * @see WikiPage::exists
2360          */
2361         public function exists() {
2362                 return $this->mPage->exists();
2363         }
2364
2365         /**
2366          * Call to WikiPage function for backwards compatibility.
2367          * @see WikiPage::followRedirect
2368          */
2369         public function followRedirect() {
2370                 return $this->mPage->followRedirect();
2371         }
2372
2373         /**
2374          * Call to WikiPage function for backwards compatibility.
2375          * @see ContentHandler::getActionOverrides
2376          */
2377         public function getActionOverrides() {
2378                 return $this->mPage->getActionOverrides();
2379         }
2380
2381         /**
2382          * Call to WikiPage function for backwards compatibility.
2383          * @see WikiPage::getAutoDeleteReason
2384          */
2385         public function getAutoDeleteReason( &$hasHistory ) {
2386                 return $this->mPage->getAutoDeleteReason( $hasHistory );
2387         }
2388
2389         /**
2390          * Call to WikiPage function for backwards compatibility.
2391          * @see WikiPage::getCategories
2392          */
2393         public function getCategories() {
2394                 return $this->mPage->getCategories();
2395         }
2396
2397         /**
2398          * Call to WikiPage function for backwards compatibility.
2399          * @see WikiPage::getComment
2400          */
2401         public function getComment( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2402                 return $this->mPage->getComment( $audience, $user );
2403         }
2404
2405         /**
2406          * Call to WikiPage function for backwards compatibility.
2407          * @see WikiPage::getContentHandler
2408          */
2409         public function getContentHandler() {
2410                 return $this->mPage->getContentHandler();
2411         }
2412
2413         /**
2414          * Call to WikiPage function for backwards compatibility.
2415          * @see WikiPage::getContentModel
2416          */
2417         public function getContentModel() {
2418                 return $this->mPage->getContentModel();
2419         }
2420
2421         /**
2422          * Call to WikiPage function for backwards compatibility.
2423          * @see WikiPage::getContributors
2424          */
2425         public function getContributors() {
2426                 return $this->mPage->getContributors();
2427         }
2428
2429         /**
2430          * Call to WikiPage function for backwards compatibility.
2431          * @see WikiPage::getCreator
2432          */
2433         public function getCreator( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2434                 return $this->mPage->getCreator( $audience, $user );
2435         }
2436
2437         /**
2438          * Call to WikiPage function for backwards compatibility.
2439          * @see WikiPage::getDeletionUpdates
2440          */
2441         public function getDeletionUpdates( Content $content = null ) {
2442                 return $this->mPage->getDeletionUpdates( $content );
2443         }
2444
2445         /**
2446          * Call to WikiPage function for backwards compatibility.
2447          * @see WikiPage::getHiddenCategories
2448          */
2449         public function getHiddenCategories() {
2450                 return $this->mPage->getHiddenCategories();
2451         }
2452
2453         /**
2454          * Call to WikiPage function for backwards compatibility.
2455          * @see WikiPage::getId
2456          */
2457         public function getId() {
2458                 return $this->mPage->getId();
2459         }
2460
2461         /**
2462          * Call to WikiPage function for backwards compatibility.
2463          * @see WikiPage::getLatest
2464          */
2465         public function getLatest() {
2466                 return $this->mPage->getLatest();
2467         }
2468
2469         /**
2470          * Call to WikiPage function for backwards compatibility.
2471          * @see WikiPage::getLinksTimestamp
2472          */
2473         public function getLinksTimestamp() {
2474                 return $this->mPage->getLinksTimestamp();
2475         }
2476
2477         /**
2478          * Call to WikiPage function for backwards compatibility.
2479          * @see WikiPage::getMinorEdit
2480          */
2481         public function getMinorEdit() {
2482                 return $this->mPage->getMinorEdit();
2483         }
2484
2485         /**
2486          * Call to WikiPage function for backwards compatibility.
2487          * @see WikiPage::getOldestRevision
2488          */
2489         public function getOldestRevision() {
2490                 return $this->mPage->getOldestRevision();
2491         }
2492
2493         /**
2494          * Call to WikiPage function for backwards compatibility.
2495          * @see WikiPage::getRedirectTarget
2496          */
2497         public function getRedirectTarget() {
2498                 return $this->mPage->getRedirectTarget();
2499         }
2500
2501         /**
2502          * Call to WikiPage function for backwards compatibility.
2503          * @see WikiPage::getRedirectURL
2504          */
2505         public function getRedirectURL( $rt ) {
2506                 return $this->mPage->getRedirectURL( $rt );
2507         }
2508
2509         /**
2510          * Call to WikiPage function for backwards compatibility.
2511          * @see WikiPage::getRevision
2512          */
2513         public function getRevision() {
2514                 return $this->mPage->getRevision();
2515         }
2516
2517         /**
2518          * Call to WikiPage function for backwards compatibility.
2519          * @see WikiPage::getTimestamp
2520          */
2521         public function getTimestamp() {
2522                 return $this->mPage->getTimestamp();
2523         }
2524
2525         /**
2526          * Call to WikiPage function for backwards compatibility.
2527          * @see WikiPage::getTouched
2528          */
2529         public function getTouched() {
2530                 return $this->mPage->getTouched();
2531         }
2532
2533         /**
2534          * Call to WikiPage function for backwards compatibility.
2535          * @see WikiPage::getUndoContent
2536          */
2537         public function getUndoContent( Revision $undo, Revision $undoafter = null ) {
2538                 return $this->mPage->getUndoContent( $undo, $undoafter );
2539         }
2540
2541         /**
2542          * Call to WikiPage function for backwards compatibility.
2543          * @see WikiPage::getUser
2544          */
2545         public function getUser( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2546                 return $this->mPage->getUser( $audience, $user );
2547         }
2548
2549         /**
2550          * Call to WikiPage function for backwards compatibility.
2551          * @see WikiPage::getUserText
2552          */
2553         public function getUserText( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2554                 return $this->mPage->getUserText( $audience, $user );
2555         }
2556
2557         /**
2558          * Call to WikiPage function for backwards compatibility.
2559          * @see WikiPage::hasViewableContent
2560          */
2561         public function hasViewableContent() {
2562                 return $this->mPage->hasViewableContent();
2563         }
2564
2565         /**
2566          * Call to WikiPage function for backwards compatibility.
2567          * @see WikiPage::insertOn
2568          */
2569         public function insertOn( $dbw, $pageId = null ) {
2570                 return $this->mPage->insertOn( $dbw, $pageId );
2571         }
2572
2573         /**
2574          * Call to WikiPage function for backwards compatibility.
2575          * @see WikiPage::insertProtectNullRevision
2576          */
2577         public function insertProtectNullRevision( $revCommentMsg, array $limit,
2578                 array $expiry, $cascade, $reason, $user = null
2579         ) {
2580                 return $this->mPage->insertProtectNullRevision( $revCommentMsg, $limit,
2581                         $expiry, $cascade, $reason, $user
2582                 );
2583         }
2584
2585         /**
2586          * Call to WikiPage function for backwards compatibility.
2587          * @see WikiPage::insertRedirect
2588          */
2589         public function insertRedirect() {
2590                 return $this->mPage->insertRedirect();
2591         }
2592
2593         /**
2594          * Call to WikiPage function for backwards compatibility.
2595          * @see WikiPage::insertRedirectEntry
2596          */
2597         public function insertRedirectEntry( Title $rt, $oldLatest = null ) {
2598                 return $this->mPage->insertRedirectEntry( $rt, $oldLatest );
2599         }
2600
2601         /**
2602          * Call to WikiPage function for backwards compatibility.
2603          * @see WikiPage::isCountable
2604          */
2605         public function isCountable( $editInfo = false ) {
2606                 return $this->mPage->isCountable( $editInfo );
2607         }
2608
2609         /**
2610          * Call to WikiPage function for backwards compatibility.
2611          * @see WikiPage::isRedirect
2612          */
2613         public function isRedirect() {
2614                 return $this->mPage->isRedirect();
2615         }
2616
2617         /**
2618          * Call to WikiPage function for backwards compatibility.
2619          * @see WikiPage::loadFromRow
2620          */
2621         public function loadFromRow( $data, $from ) {
2622                 return $this->mPage->loadFromRow( $data, $from );
2623         }
2624
2625         /**
2626          * Call to WikiPage function for backwards compatibility.
2627          * @see WikiPage::loadPageData
2628          */
2629         public function loadPageData( $from = 'fromdb' ) {
2630                 $this->mPage->loadPageData( $from );
2631         }
2632
2633         /**
2634          * Call to WikiPage function for backwards compatibility.
2635          * @see WikiPage::lockAndGetLatest
2636          */
2637         public function lockAndGetLatest() {
2638                 return $this->mPage->lockAndGetLatest();
2639         }
2640
2641         /**
2642          * Call to WikiPage function for backwards compatibility.
2643          * @see WikiPage::makeParserOptions
2644          */
2645         public function makeParserOptions( $context ) {
2646                 return $this->mPage->makeParserOptions( $context );
2647         }
2648
2649         /**
2650          * Call to WikiPage function for backwards compatibility.
2651          * @see WikiPage::pageDataFromId
2652          */
2653         public function pageDataFromId( $dbr, $id, $options = [] ) {
2654                 return $this->mPage->pageDataFromId( $dbr, $id, $options );
2655         }
2656
2657         /**
2658          * Call to WikiPage function for backwards compatibility.
2659          * @see WikiPage::pageDataFromTitle
2660          */
2661         public function pageDataFromTitle( $dbr, $title, $options = [] ) {
2662                 return $this->mPage->pageDataFromTitle( $dbr, $title, $options );
2663         }
2664
2665         /**
2666          * Call to WikiPage function for backwards compatibility.
2667          * @see WikiPage::prepareContentForEdit
2668          */
2669         public function prepareContentForEdit(
2670                 Content $content, $revision = null, User $user = null,
2671                 $serialFormat = null, $useCache = true
2672         ) {
2673                 return $this->mPage->prepareContentForEdit(
2674                         $content, $revision, $user,
2675                         $serialFormat, $useCache
2676                 );
2677         }
2678
2679         /**
2680          * Call to WikiPage function for backwards compatibility.
2681          * @see WikiPage::protectDescription
2682          */
2683         public function protectDescription( array $limit, array $expiry ) {
2684                 return $this->mPage->protectDescription( $limit, $expiry );
2685         }
2686
2687         /**
2688          * Call to WikiPage function for backwards compatibility.
2689          * @see WikiPage::protectDescriptionLog
2690          */
2691         public function protectDescriptionLog( array $limit, array $expiry ) {
2692                 return $this->mPage->protectDescriptionLog( $limit, $expiry );
2693         }
2694
2695         /**
2696          * Call to WikiPage function for backwards compatibility.
2697          * @see WikiPage::replaceSectionAtRev
2698          */
2699         public function replaceSectionAtRev( $sectionId, Content $sectionContent,
2700                 $sectionTitle = '', $baseRevId = null
2701         ) {
2702                 return $this->mPage->replaceSectionAtRev( $sectionId, $sectionContent,
2703                         $sectionTitle, $baseRevId
2704                 );
2705         }
2706
2707         /**
2708          * Call to WikiPage function for backwards compatibility.
2709          * @see WikiPage::replaceSectionContent
2710          */
2711         public function replaceSectionContent(
2712                 $sectionId, Content $sectionContent, $sectionTitle = '', $edittime = null
2713         ) {
2714                 return $this->mPage->replaceSectionContent(
2715                         $sectionId, $sectionContent, $sectionTitle, $edittime
2716                 );
2717         }
2718
2719         /**
2720          * Call to WikiPage function for backwards compatibility.
2721          * @see WikiPage::setTimestamp
2722          */
2723         public function setTimestamp( $ts ) {
2724                 return $this->mPage->setTimestamp( $ts );
2725         }
2726
2727         /**
2728          * Call to WikiPage function for backwards compatibility.
2729          * @see WikiPage::shouldCheckParserCache
2730          */
2731         public function shouldCheckParserCache( ParserOptions $parserOptions, $oldId ) {
2732                 return $this->mPage->shouldCheckParserCache( $parserOptions, $oldId );
2733         }
2734
2735         /**
2736          * Call to WikiPage function for backwards compatibility.
2737          * @see WikiPage::supportsSections
2738          */
2739         public function supportsSections() {
2740                 return $this->mPage->supportsSections();
2741         }
2742
2743         /**
2744          * Call to WikiPage function for backwards compatibility.
2745          * @see WikiPage::triggerOpportunisticLinksUpdate
2746          */
2747         public function triggerOpportunisticLinksUpdate( ParserOutput $parserOutput ) {
2748                 return $this->mPage->triggerOpportunisticLinksUpdate( $parserOutput );
2749         }
2750
2751         /**
2752          * Call to WikiPage function for backwards compatibility.
2753          * @see WikiPage::updateCategoryCounts
2754          */
2755         public function updateCategoryCounts( array $added, array $deleted, $id = 0 ) {
2756                 return $this->mPage->updateCategoryCounts( $added, $deleted, $id );
2757         }
2758
2759         /**
2760          * Call to WikiPage function for backwards compatibility.
2761          * @see WikiPage::updateIfNewerOn
2762          */
2763         public function updateIfNewerOn( $dbw, $revision ) {
2764                 return $this->mPage->updateIfNewerOn( $dbw, $revision );
2765         }
2766
2767         /**
2768          * Call to WikiPage function for backwards compatibility.
2769          * @see WikiPage::updateRedirectOn
2770          */
2771         public function updateRedirectOn( $dbw, $redirectTitle, $lastRevIsRedirect = null ) {
2772                 return $this->mPage->updateRedirectOn( $dbw, $redirectTitle, $lastRevIsRedirect );
2773         }
2774
2775         /**
2776          * Call to WikiPage function for backwards compatibility.
2777          * @see WikiPage::updateRevisionOn
2778          */
2779         public function updateRevisionOn( $dbw, $revision, $lastRevision = null,
2780                 $lastRevIsRedirect = null
2781         ) {
2782                 return $this->mPage->updateRevisionOn( $dbw, $revision, $lastRevision,
2783                         $lastRevIsRedirect
2784                 );
2785         }
2786
2787         /**
2788          * @param array $limit
2789          * @param array $expiry
2790          * @param bool &$cascade
2791          * @param string $reason
2792          * @param User $user
2793          * @return Status
2794          */
2795         public function doUpdateRestrictions( array $limit, array $expiry, &$cascade,
2796                 $reason, User $user
2797         ) {
2798                 return $this->mPage->doUpdateRestrictions( $limit, $expiry, $cascade, $reason, $user );
2799         }
2800
2801         /**
2802          * @param array $limit
2803          * @param string $reason
2804          * @param int &$cascade
2805          * @param array $expiry
2806          * @return bool
2807          */
2808         public function updateRestrictions( $limit = [], $reason = '',
2809                 &$cascade = 0, $expiry = []
2810         ) {
2811                 return $this->mPage->doUpdateRestrictions(
2812                         $limit,
2813                         $expiry,
2814                         $cascade,
2815                         $reason,
2816                         $this->getContext()->getUser()
2817                 );
2818         }
2819
2820         /**
2821          * @param string $reason
2822          * @param bool $suppress
2823          * @param int|null $u1 Unused
2824          * @param bool|null $u2 Unused
2825          * @param string &$error
2826          * @return bool
2827          */
2828         public function doDeleteArticle(
2829                 $reason, $suppress = false, $u1 = null, $u2 = null, &$error = ''
2830         ) {
2831                 return $this->mPage->doDeleteArticle( $reason, $suppress, $u1, $u2, $error );
2832         }
2833
2834         /**
2835          * @param string $fromP
2836          * @param string $summary
2837          * @param string $token
2838          * @param bool $bot
2839          * @param array &$resultDetails
2840          * @param User|null $user
2841          * @return array
2842          */
2843         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails, User $user = null ) {
2844                 $user = is_null( $user ) ? $this->getContext()->getUser() : $user;
2845                 return $this->mPage->doRollback( $fromP, $summary, $token, $bot, $resultDetails, $user );
2846         }
2847
2848         /**
2849          * @param string $fromP
2850          * @param string $summary
2851          * @param bool $bot
2852          * @param array &$resultDetails
2853          * @param User|null $guser
2854          * @return array
2855          */
2856         public function commitRollback( $fromP, $summary, $bot, &$resultDetails, User $guser = null ) {
2857                 $guser = is_null( $guser ) ? $this->getContext()->getUser() : $guser;
2858                 return $this->mPage->commitRollback( $fromP, $summary, $bot, $resultDetails, $guser );
2859         }
2860
2861         /**
2862          * @param bool &$hasHistory
2863          * @return mixed
2864          */
2865         public function generateReason( &$hasHistory ) {
2866                 $title = $this->mPage->getTitle();
2867                 $handler = ContentHandler::getForTitle( $title );
2868                 return $handler->getAutoDeleteReason( $title, $hasHistory );
2869         }
2870
2871         // ******
2872 }