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
  23 /**
  24  * Class for viewing MediaWiki article and history.
  25  *
  26  * This maintains WikiPage functions for backwards compatibility.
  27  *
  28  * @todo Move and rewrite code to an Action class
  29  *
  30  * See design.txt for an overview.
  31  * Note: edit user interface and cache support functions have been
  32  * moved to separate EditPage and HTMLFileCache classes.
  33  */
  34 class Article implements Page {
  35         /** @var IContextSource The context this Article is executed in */
  36         protected $mContext;
  37
  38         /** @var WikiPage The WikiPage object of this instance */
  39         protected $mPage;
  40
  41         /** @var ParserOptions ParserOptions object for $wgUser articles */
  42         public $mParserOptions;
  43
  44         /**
  45          * @var string Text of the revision we are working on
  46          * @todo BC cruft
  47          */
  48         public $mContent;
  49
  50         /**
  51          * @var Content Content of the revision we are working on
  52          * @since 1.21
  53          */
  54         public $mContentObject;
  55
  56         /** @var bool Is the content ($mContent) already loaded? */
  57         public $mContentLoaded = false;
  58
  59         /** @var int|null The oldid of the article that is to be shown, 0 for the current revision */
  60         public $mOldId;
  61
  62         /** @var Title Title from which we were redirected here */
  63         public $mRedirectedFrom = null;
  64
  65         /** @var string|bool URL to redirect to or false if none */
  66         public $mRedirectUrl = false;
  67
  68         /** @var int Revision ID of revision we are working on */
  69         public $mRevIdFetched = 0;
  70
  71         /** @var Revision Revision we are working on */
  72         public $mRevision = null;
  73
  74         /** @var ParserOutput */
  75         public $mParserOutput;
  76
  77         /**
  78          * Constructor and clear the article
  79          * @param Title $title Reference to a Title object.
  80          * @param int $oldId Revision ID, null to fetch from request, zero for current
  81          */
  82         public function __construct( Title $title, $oldId = null ) {
  83                 $this->mOldId = $oldId;
  84                 $this->mPage = $this->newPage( $title );
  85         }
  86
  87         /**
  88          * @param Title $title
  89          * @return WikiPage
  90          */
  91         protected function newPage( Title $title ) {
  92                 return new WikiPage( $title );
  93         }
  94
  95         /**
  96          * Constructor from a page id
  97          * @param int $id Article ID to load
  98          * @return Article|null
  99          */
 100         public static function newFromID( $id ) {
 101                 $t = Title::newFromID( $id );
 102                 return $t == null ? null : new static( $t );
 103         }
 104
 105         /**
 106          * Create an Article object of the appropriate class for the given page.
 107          *
 108          * @param Title $title
 109          * @param IContextSource $context
 110          * @return Article
 111          */
 112         public static function newFromTitle( $title, IContextSource $context ) {
 113                 if ( NS_MEDIA == $title->getNamespace() ) {
 114                         // FIXME: where should this go?
 115                         $title = Title::makeTitle( NS_FILE, $title->getDBkey() );
 116                 }
 117
 118                 $page = null;
 119                 Hooks::run( 'ArticleFromTitle', [ &$title, &$page, $context ] );
 120                 if ( !$page ) {
 121                         switch ( $title->getNamespace() ) {
 122                                 case NS_FILE:
 123                                         $page = new ImagePage( $title );
 124                                         break;
 125                                 case NS_CATEGORY:
 126                                         $page = new CategoryPage( $title );
 127                                         break;
 128                                 default:
 129                                         $page = new Article( $title );
 130                         }
 131                 }
 132                 $page->setContext( $context );
 133
 134                 return $page;
 135         }
 136
 137         /**
 138          * Create an Article object of the appropriate class for the given page.
 139          *
 140          * @param WikiPage $page
 141          * @param IContextSource $context
 142          * @return Article
 143          */
 144         public static function newFromWikiPage( WikiPage $page, IContextSource $context ) {
 145                 $article = self::newFromTitle( $page->getTitle(), $context );
 146                 $article->mPage = $page; // override to keep process cached vars
 147                 return $article;
 148         }
 149
 150         /**
 151          * Get the page this view was redirected from
 152          * @return Title|null
 153          * @since 1.28
 154          */
 155         public function getRedirectedFrom() {
 156                 return $this->mRedirectedFrom;
 157         }
 158
 159         /**
 160          * Tell the page view functions that this view was redirected
 161          * from another page on the wiki.
 162          * @param Title $from
 163          */
 164         public function setRedirectedFrom( Title $from ) {
 165                 $this->mRedirectedFrom = $from;
 166         }
 167
 168         /**
 169          * Get the title object of the article
 170          *
 171          * @return Title Title object of this page
 172          */
 173         public function getTitle() {
 174                 return $this->mPage->getTitle();
 175         }
 176
 177         /**
 178          * Get the WikiPage object of this instance
 179          *
 180          * @since 1.19
 181          * @return WikiPage
 182          */
 183         public function getPage() {
 184                 return $this->mPage;
 185         }
 186
 187         /**
 188          * Clear the object
 189          */
 190         public function clear() {
 191                 $this->mContentLoaded = false;
 192
 193                 $this->mRedirectedFrom = null; # Title object if set
 194                 $this->mRevIdFetched = 0;
 195                 $this->mRedirectUrl = false;
 196
 197                 $this->mPage->clear();
 198         }
 199
 200         /**
 201          * Note that getContent does not follow redirects anymore.
 202          * If you need to fetch redirectable content easily, try
 203          * the shortcut in WikiPage::getRedirectTarget()
 204          *
 205          * This function has side effects! Do not use this function if you
 206          * only want the real revision text if any.
 207          *
 208          * @deprecated since 1.21; use WikiPage::getContent() instead
 209          *
 210          * @return string Return the text of this revision
 211          */
 212         public function getContent() {
 213                 wfDeprecated( __METHOD__, '1.21' );
 214                 $content = $this->getContentObject();
 215                 return ContentHandler::getContentText( $content );
 216         }
 217
 218         /**
 219          * Returns a Content object representing the pages effective display content,
 220          * not necessarily the revision's content!
 221          *
 222          * Note that getContent does not follow redirects anymore.
 223          * If you need to fetch redirectable content easily, try
 224          * the shortcut in WikiPage::getRedirectTarget()
 225          *
 226          * This function has side effects! Do not use this function if you
 227          * only want the real revision text if any.
 228          *
 229          * @return Content Return the content of this revision
 230          *
 231          * @since 1.21
 232          */
 233         protected function getContentObject() {
 234
 235                 if ( $this->mPage->getId() === 0 ) {
 236                         # If this is a MediaWiki:x message, then load the messages
 237                         # and return the message value for x.
 238                         if ( $this->getTitle()->getNamespace() == NS_MEDIAWIKI ) {
 239                                 $text = $this->getTitle()->getDefaultMessageText();
 240                                 if ( $text === false ) {
 241                                         $text = '';
 242                                 }
 243
 244                                 $content = ContentHandler::makeContent( $text, $this->getTitle() );
 245                         } else {
 246                                 $message = $this->getContext()->getUser()->isLoggedIn() ? 'noarticletext' : 'noarticletextanon';
 247                                 $content = new MessageContent( $message, null, 'parsemag' );
 248                         }
 249                 } else {
 250                         $this->fetchContentObject();
 251                         $content = $this->mContentObject;
 252                 }
 253
 254                 return $content;
 255         }
 256
 257         /**
 258          * @return int The oldid of the article that is to be shown, 0 for the current revision
 259          */
 260         public function getOldID() {
 261                 if ( is_null( $this->mOldId ) ) {
 262                         $this->mOldId = $this->getOldIDFromRequest();
 263                 }
 264
 265                 return $this->mOldId;
 266         }
 267
 268         /**
 269          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 270          *
 271          * @return int The old id for the request
 272          */
 273         public function getOldIDFromRequest() {
 274                 $this->mRedirectUrl = false;
 275
 276                 $request = $this->getContext()->getRequest();
 277                 $oldid = $request->getIntOrNull( 'oldid' );
 278
 279                 if ( $oldid === null ) {
 280                         return 0;
 281                 }
 282
 283                 if ( $oldid !== 0 ) {
 284                         # Load the given revision and check whether the page is another one.
 285                         # In that case, update this instance to reflect the change.
 286                         if ( $oldid === $this->mPage->getLatest() ) {
 287                                 $this->mRevision = $this->mPage->getRevision();
 288                         } else {
 289                                 $this->mRevision = Revision::newFromId( $oldid );
 290                                 if ( $this->mRevision !== null ) {
 291                                         // Revision title doesn't match the page title given?
 292                                         if ( $this->mPage->getId() != $this->mRevision->getPage() ) {
 293                                                 $function = [ get_class( $this->mPage ), 'newFromID' ];
 294                                                 $this->mPage = call_user_func( $function, $this->mRevision->getPage() );
 295                                         }
 296                                 }
 297                         }
 298                 }
 299
 300                 if ( $request->getVal( 'direction' ) == 'next' ) {
 301                         $nextid = $this->getTitle()->getNextRevisionID( $oldid );
 302                         if ( $nextid ) {
 303                                 $oldid = $nextid;
 304                                 $this->mRevision = null;
 305                         } else {
 306                                 $this->mRedirectUrl = $this->getTitle()->getFullURL( 'redirect=no' );
 307                         }
 308                 } elseif ( $request->getVal( 'direction' ) == 'prev' ) {
 309                         $previd = $this->getTitle()->getPreviousRevisionID( $oldid );
 310                         if ( $previd ) {
 311                                 $oldid = $previd;
 312                                 $this->mRevision = null;
 313                         }
 314                 }
 315
 316                 return $oldid;
 317         }
 318
 319         /**
 320          * Get text of an article from database
 321          * Does *NOT* follow redirects.
 322          *
 323          * @protected
 324          * @note This is really internal functionality that should really NOT be
 325          * used by other functions. For accessing article content, use the WikiPage
 326          * class, especially WikiBase::getContent(). However, a lot of legacy code
 327          * uses this method to retrieve page text from the database, so the function
 328          * has to remain public for now.
 329          *
 330          * @return string|bool String containing article contents, or false if null
 331          * @deprecated since 1.21, use WikiPage::getContent() instead
 332          */
 333         function fetchContent() {
 334                 // BC cruft!
 335
 336                 wfDeprecated( __METHOD__, '1.21' );
 337
 338                 if ( $this->mContentLoaded && $this->mContent ) {
 339                         return $this->mContent;
 340                 }
 341
 342                 $content = $this->fetchContentObject();
 343
 344                 if ( !$content ) {
 345                         return false;
 346                 }
 347
 348                 // @todo Get rid of mContent everywhere!
 349                 $this->mContent = ContentHandler::getContentText( $content );
 350                 ContentHandler::runLegacyHooks(
 351                         'ArticleAfterFetchContent',
 352                         [ &$this, &$this->mContent ],
 353                         '1.21'
 354                 );
 355
 356                 return $this->mContent;
 357         }
 358
 359         /**
 360          * Get text content object
 361          * Does *NOT* follow redirects.
 362          * @todo When is this null?
 363          *
 364          * @note Code that wants to retrieve page content from the database should
 365          * use WikiPage::getContent().
 366          *
 367          * @return Content|null|bool
 368          *
 369          * @since 1.21
 370          */
 371         protected function fetchContentObject() {
 372                 if ( $this->mContentLoaded ) {
 373                         return $this->mContentObject;
 374                 }
 375
 376                 $this->mContentLoaded = true;
 377                 $this->mContent = null;
 378
 379                 $oldid = $this->getOldID();
 380
 381                 # Pre-fill content with error message so that if something
 382                 # fails we'll have something telling us what we intended.
 383                 // XXX: this isn't page content but a UI message. horrible.
 384                 $this->mContentObject = new MessageContent( 'missing-revision', [ $oldid ] );
 385
 386                 if ( $oldid ) {
 387                         # $this->mRevision might already be fetched by getOldIDFromRequest()
 388                         if ( !$this->mRevision ) {
 389                                 $this->mRevision = Revision::newFromId( $oldid );
 390                                 if ( !$this->mRevision ) {
 391                                         wfDebug( __METHOD__ . " failed to retrieve specified revision, id $oldid\n" );
 392                                         return false;
 393                                 }
 394                         }
 395                 } else {
 396                         $oldid = $this->mPage->getLatest();
 397                         if ( !$oldid ) {
 398                                 wfDebug( __METHOD__ . " failed to find page data for title " .
 399                                         $this->getTitle()->getPrefixedText() . "\n" );
 400                                 return false;
 401                         }
 402
 403                         # Update error message with correct oldid
 404                         $this->mContentObject = new MessageContent( 'missing-revision', [ $oldid ] );
 405
 406                         $this->mRevision = $this->mPage->getRevision();
 407
 408                         if ( !$this->mRevision ) {
 409                                 wfDebug( __METHOD__ . " failed to retrieve current page, rev_id $oldid\n" );
 410                                 return false;
 411                         }
 412                 }
 413
 414                 // @todo FIXME: Horrible, horrible! This content-loading interface just plain sucks.
 415                 // We should instead work with the Revision object when we need it...
 416                 // Loads if user is allowed
 417                 $content = $this->mRevision->getContent(
 418                         Revision::FOR_THIS_USER,
 419                         $this->getContext()->getUser()
 420                 );
 421
 422                 if ( !$content ) {
 423                         wfDebug( __METHOD__ . " failed to retrieve content of revision " .
 424                                 $this->mRevision->getId() . "\n" );
 425                         return false;
 426                 }
 427
 428                 $this->mContentObject = $content;
 429                 $this->mRevIdFetched = $this->mRevision->getId();
 430
 431                 ContentHandler::runLegacyHooks(
 432                         'ArticleAfterFetchContentObject',
 433                         [ &$this, &$this->mContentObject ],
 434                         '1.21'
 435                 );
 436
 437                 return $this->mContentObject;
 438         }
 439
 440         /**
 441          * Returns true if the currently-referenced revision is the current edit
 442          * to this page (and it exists).
 443          * @return bool
 444          */
 445         public function isCurrent() {
 446                 # If no oldid, this is the current version.
 447                 if ( $this->getOldID() == 0 ) {
 448                         return true;
 449                 }
 450
 451                 return $this->mPage->exists() && $this->mRevision && $this->mRevision->isCurrent();
 452         }
 453
 454         /**
 455          * Get the fetched Revision object depending on request parameters or null
 456          * on failure.
 457          *
 458          * @since 1.19
 459          * @return Revision|null
 460          */
 461         public function getRevisionFetched() {
 462                 $this->fetchContentObject();
 463
 464                 return $this->mRevision;
 465         }
 466
 467         /**
 468          * Use this to fetch the rev ID used on page views
 469          *
 470          * @return int Revision ID of last article revision
 471          */
 472         public function getRevIdFetched() {
 473                 if ( $this->mRevIdFetched ) {
 474                         return $this->mRevIdFetched;
 475                 } else {
 476                         return $this->mPage->getLatest();
 477                 }
 478         }
 479
 480         /**
 481          * This is the default action of the index.php entry point: just view the
 482          * page of the given title.
 483          */
 484         public function view() {
 485                 global $wgUseFileCache, $wgDebugToolbar;
 486
 487                 # Get variables from query string
 488                 # As side effect this will load the revision and update the title
 489                 # in a revision ID is passed in the request, so this should remain
 490                 # the first call of this method even if $oldid is used way below.
 491                 $oldid = $this->getOldID();
 492
 493                 $user = $this->getContext()->getUser();
 494                 # Another whitelist check in case getOldID() is altering the title
 495                 $permErrors = $this->getTitle()->getUserPermissionsErrors( 'read', $user );
 496                 if ( count( $permErrors ) ) {
 497                         wfDebug( __METHOD__ . ": denied on secondary read check\n" );
 498                         throw new PermissionsError( 'read', $permErrors );
 499                 }
 500
 501                 $outputPage = $this->getContext()->getOutput();
 502                 # getOldID() may as well want us to redirect somewhere else
 503                 if ( $this->mRedirectUrl ) {
 504                         $outputPage->redirect( $this->mRedirectUrl );
 505                         wfDebug( __METHOD__ . ": redirecting due to oldid\n" );
 506
 507                         return;
 508                 }
 509
 510                 # If we got diff in the query, we want to see a diff page instead of the article.
 511                 if ( $this->getContext()->getRequest()->getCheck( 'diff' ) ) {
 512                         wfDebug( __METHOD__ . ": showing diff page\n" );
 513                         $this->showDiffPage();
 514
 515                         return;
 516                 }
 517
 518                 # Set page title (may be overridden by DISPLAYTITLE)
 519                 $outputPage->setPageTitle( $this->getTitle()->getPrefixedText() );
 520
 521                 $outputPage->setArticleFlag( true );
 522                 # Allow frames by default
 523                 $outputPage->allowClickjacking();
 524
 525                 $parserCache = ParserCache::singleton();
 526
 527                 $parserOptions = $this->getParserOptions();
 528                 # Render printable version, use printable version cache
 529                 if ( $outputPage->isPrintable() ) {
 530                         $parserOptions->setIsPrintable( true );
 531                         $parserOptions->setEditSection( false );
 532                 } elseif ( !$this->isCurrent() || !$this->getTitle()->quickUserCan( 'edit', $user ) ) {
 533                         $parserOptions->setEditSection( false );
 534                 }
 535
 536                 # Try client and file cache
 537                 if ( !$wgDebugToolbar && $oldid === 0 && $this->mPage->checkTouched() ) {
 538                         # Try to stream the output from file cache
 539                         if ( $wgUseFileCache && $this->tryFileCache() ) {
 540                                 wfDebug( __METHOD__ . ": done file cache\n" );
 541                                 # tell wgOut that output is taken care of
 542                                 $outputPage->disable();
 543                                 $this->mPage->doViewUpdates( $user, $oldid );
 544
 545                                 return;
 546                         }
 547                 }
 548
 549                 # Should the parser cache be used?
 550                 $useParserCache = $this->mPage->shouldCheckParserCache( $parserOptions, $oldid );
 551                 wfDebug( 'Article::view using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
 552                 if ( $user->getStubThreshold() ) {
 553                         $this->getContext()->getStats()->increment( 'pcache_miss_stub' );
 554                 }
 555
 556                 $this->showRedirectedFromHeader();
 557                 $this->showNamespaceHeader();
 558
 559                 # Iterate through the possible ways of constructing the output text.
 560                 # Keep going until $outputDone is set, or we run out of things to do.
 561                 $pass = 0;
 562                 $outputDone = false;
 563                 $this->mParserOutput = false;
 564
 565                 while ( !$outputDone && ++$pass ) {
 566                         switch ( $pass ) {
 567                                 case 1:
 568                                         Hooks::run( 'ArticleViewHeader', [ &$this, &$outputDone, &$useParserCache ] );
 569                                         break;
 570                                 case 2:
 571                                         # Early abort if the page doesn't exist
 572                                         if ( !$this->mPage->exists() ) {
 573                                                 wfDebug( __METHOD__ . ": showing missing article\n" );
 574                                                 $this->showMissingArticle();
 575                                                 $this->mPage->doViewUpdates( $user );
 576                                                 return;
 577                                         }
 578
 579                                         # Try the parser cache
 580                                         if ( $useParserCache ) {
 581                                                 $this->mParserOutput = $parserCache->get( $this->mPage, $parserOptions );
 582
 583                                                 if ( $this->mParserOutput !== false ) {
 584                                                         if ( $oldid ) {
 585                                                                 wfDebug( __METHOD__ . ": showing parser cache contents for current rev permalink\n" );
 586                                                                 $this->setOldSubtitle( $oldid );
 587                                                         } else {
 588                                                                 wfDebug( __METHOD__ . ": showing parser cache contents\n" );
 589                                                         }
 590                                                         $outputPage->addParserOutput( $this->mParserOutput );
 591                                                         # Ensure that UI elements requiring revision ID have
 592                                                         # the correct version information.
 593                                                         $outputPage->setRevisionId( $this->mPage->getLatest() );
 594                                                         # Preload timestamp to avoid a DB hit
 595                                                         $cachedTimestamp = $this->mParserOutput->getTimestamp();
 596                                                         if ( $cachedTimestamp !== null ) {
 597                                                                 $outputPage->setRevisionTimestamp( $cachedTimestamp );
 598                                                                 $this->mPage->setTimestamp( $cachedTimestamp );
 599                                                         }
 600                                                         $outputDone = true;
 601                                                 }
 602                                         }
 603                                         break;
 604                                 case 3:
 605                                         # This will set $this->mRevision if needed
 606                                         $this->fetchContentObject();
 607
 608                                         # Are we looking at an old revision
 609                                         if ( $oldid && $this->mRevision ) {
 610                                                 $this->setOldSubtitle( $oldid );
 611
 612                                                 if ( !$this->showDeletedRevisionHeader() ) {
 613                                                         wfDebug( __METHOD__ . ": cannot view deleted revision\n" );
 614                                                         return;
 615                                                 }
 616                                         }
 617
 618                                         # Ensure that UI elements requiring revision ID have
 619                                         # the correct version information.
 620                                         $outputPage->setRevisionId( $this->getRevIdFetched() );
 621                                         # Preload timestamp to avoid a DB hit
 622                                         $outputPage->setRevisionTimestamp( $this->mPage->getTimestamp() );
 623
 624                                         # Pages containing custom CSS or JavaScript get special treatment
 625                                         if ( $this->getTitle()->isCssOrJsPage() || $this->getTitle()->isCssJsSubpage() ) {
 626                                                 wfDebug( __METHOD__ . ": showing CSS/JS source\n" );
 627                                                 $this->showCssOrJsPage();
 628                                                 $outputDone = true;
 629                                         } elseif ( !Hooks::run( 'ArticleContentViewCustom',
 630                                                         [ $this->fetchContentObject(), $this->getTitle(), $outputPage ] ) ) {
 631
 632                                                 # Allow extensions do their own custom view for certain pages
 633                                                 $outputDone = true;
 634                                         } elseif ( !ContentHandler::runLegacyHooks(
 635                                                 'ArticleViewCustom',
 636                                                 [ $this->fetchContentObject(), $this->getTitle(), $outputPage ],
 637                                                 '1.21'
 638                                         ) ) {
 639                                                 # Allow extensions do their own custom view for certain pages
 640                                                 $outputDone = true;
 641                                         }
 642                                         break;
 643                                 case 4:
 644                                         # Run the parse, protected by a pool counter
 645                                         wfDebug( __METHOD__ . ": doing uncached parse\n" );
 646
 647                                         $content = $this->getContentObject();
 648                                         $poolArticleView = new PoolWorkArticleView( $this->getPage(), $parserOptions,
 649                                                 $this->getRevIdFetched(), $useParserCache, $content );
 650
 651                                         if ( !$poolArticleView->execute() ) {
 652                                                 $error = $poolArticleView->getError();
 653                                                 if ( $error ) {
 654                                                         $outputPage->clearHTML(); // for release() errors
 655                                                         $outputPage->enableClientCache( false );
 656                                                         $outputPage->setRobotPolicy( 'noindex,nofollow' );
 657
 658                                                         $errortext = $error->getWikiText( false, 'view-pool-error' );
 659                                                         $outputPage->addWikiText( '<div class="errorbox">' . $errortext . '</div>' );
 660                                                 }
 661                                                 # Connection or timeout error
 662                                                 return;
 663                                         }
 664
 665                                         $this->mParserOutput = $poolArticleView->getParserOutput();
 666                                         $outputPage->addParserOutput( $this->mParserOutput );
 667                                         if ( $content->getRedirectTarget() ) {
 668                                                 $outputPage->addSubtitle( "<span id=\"redirectsub\">" .
 669                                                         $this->getContext()->msg( 'redirectpagesub' )->parse() . "</span>" );
 670                                         }
 671
 672                                         # Don't cache a dirty ParserOutput object
 673                                         if ( $poolArticleView->getIsDirty() ) {
 674                                                 $outputPage->setCdnMaxage( 0 );
 675                                                 $outputPage->addHTML( "<!-- parser cache is expired, " .
 676                                                         "sending anyway due to pool overload-->\n" );
 677                                         }
 678
 679                                         $outputDone = true;
 680                                         break;
 681                                 # Should be unreachable, but just in case...
 682                                 default:
 683                                         break 2;
 684                         }
 685                 }
 686
 687                 # Get the ParserOutput actually *displayed* here.
 688                 # Note that $this->mParserOutput is the *current*/oldid version output.
 689                 $pOutput = ( $outputDone instanceof ParserOutput )
 690                         ? $outputDone // object fetched by hook
 691                         : $this->mParserOutput;
 692
 693                 # Adjust title for main page & pages with displaytitle
 694                 if ( $pOutput ) {
 695                         $this->adjustDisplayTitle( $pOutput );
 696                 }
 697
 698                 # For the main page, overwrite the <title> element with the con-
 699                 # tents of 'pagetitle-view-mainpage' instead of the default (if
 700                 # that's not empty).
 701                 # This message always exists because it is in the i18n files
 702                 if ( $this->getTitle()->isMainPage() ) {
 703                         $msg = wfMessage( 'pagetitle-view-mainpage' )->inContentLanguage();
 704                         if ( !$msg->isDisabled() ) {
 705                                 $outputPage->setHTMLTitle( $msg->title( $this->getTitle() )->text() );
 706                         }
 707                 }
 708
 709                 # Check for any __NOINDEX__ tags on the page using $pOutput
 710                 $policy = $this->getRobotPolicy( 'view', $pOutput );
 711                 $outputPage->setIndexPolicy( $policy['index'] );
 712                 $outputPage->setFollowPolicy( $policy['follow'] );
 713
 714                 $this->showViewFooter();
 715                 $this->mPage->doViewUpdates( $user, $oldid );
 716
 717                 $outputPage->addModules( 'mediawiki.action.view.postEdit' );
 718
 719         }
 720
 721         /**
 722          * Adjust title for pages with displaytitle, -{T|}- or language conversion
 723          * @param ParserOutput $pOutput
 724          */
 725         public function adjustDisplayTitle( ParserOutput $pOutput ) {
 726                 # Adjust the title if it was set by displaytitle, -{T|}- or language conversion
 727                 $titleText = $pOutput->getTitleText();
 728                 if ( strval( $titleText ) !== '' ) {
 729                         $this->getContext()->getOutput()->setPageTitle( $titleText );
 730                 }
 731         }
 732
 733         /**
 734          * Show a diff page according to current request variables. For use within
 735          * Article::view() only, other callers should use the DifferenceEngine class.
 736          *
 737          */
 738         protected function showDiffPage() {
 739                 $request = $this->getContext()->getRequest();
 740                 $user = $this->getContext()->getUser();
 741                 $diff = $request->getVal( 'diff' );
 742                 $rcid = $request->getVal( 'rcid' );
 743                 $diffOnly = $request->getBool( 'diffonly', $user->getOption( 'diffonly' ) );
 744                 $purge = $request->getVal( 'action' ) == 'purge';
 745                 $unhide = $request->getInt( 'unhide' ) == 1;
 746                 $oldid = $this->getOldID();
 747
 748                 $rev = $this->getRevisionFetched();
 749
 750                 if ( !$rev ) {
 751                         $this->getContext()->getOutput()->setPageTitle( wfMessage( 'errorpagetitle' ) );
 752                         $msg = $this->getContext()->msg( 'difference-missing-revision' )
 753                                 ->params( $oldid )
 754                                 ->numParams( 1 )
 755                                 ->parseAsBlock();
 756                         $this->getContext()->getOutput()->addHTML( $msg );
 757                         return;
 758                 }
 759
 760                 $contentHandler = $rev->getContentHandler();
 761                 $de = $contentHandler->createDifferenceEngine(
 762                         $this->getContext(),
 763                         $oldid,
 764                         $diff,
 765                         $rcid,
 766                         $purge,
 767                         $unhide
 768                 );
 769
 770                 // DifferenceEngine directly fetched the revision:
 771                 $this->mRevIdFetched = $de->mNewid;
 772                 $de->showDiffPage( $diffOnly );
 773
 774                 // Run view updates for the newer revision being diffed (and shown
 775                 // below the diff if not $diffOnly).
 776                 list( $old, $new ) = $de->mapDiffPrevNext( $oldid, $diff );
 777                 // New can be false, convert it to 0 - this conveniently means the latest revision
 778                 $this->mPage->doViewUpdates( $user, (int)$new );
 779         }
 780
 781         /**
 782          * Show a page view for a page formatted as CSS or JavaScript. To be called by
 783          * Article::view() only.
 784          *
 785          * This exists mostly to serve the deprecated ShowRawCssJs hook (used to customize these views).
 786          * It has been replaced by the ContentGetParserOutput hook, which lets you do the same but with
 787          * more flexibility.
 788          *
 789          * @param bool $showCacheHint Whether to show a message telling the user
 790          *   to clear the browser cache (default: true).
 791          */
 792         protected function showCssOrJsPage( $showCacheHint = true ) {
 793                 $outputPage = $this->getContext()->getOutput();
 794
 795                 if ( $showCacheHint ) {
 796                         $dir = $this->getContext()->getLanguage()->getDir();
 797                         $lang = $this->getContext()->getLanguage()->getHtmlCode();
 798
 799                         $outputPage->wrapWikiMsg(
 800                                 "<div id='mw-clearyourcache' lang='$lang' dir='$dir' class='mw-content-$dir'>\n$1\n</div>",
 801                                 'clearyourcache'
 802                         );
 803                 }
 804
 805                 $this->fetchContentObject();
 806
 807                 if ( $this->mContentObject ) {
 808                         // Give hooks a chance to customise the output
 809                         if ( ContentHandler::runLegacyHooks(
 810                                 'ShowRawCssJs',
 811                                 [ $this->mContentObject, $this->getTitle(), $outputPage ],
 812                                 '1.24'
 813                         ) ) {
 814                                 // If no legacy hooks ran, display the content of the parser output, including RL modules,
 815                                 // but excluding metadata like categories and language links
 816                                 $po = $this->mContentObject->getParserOutput( $this->getTitle() );
 817                                 $outputPage->addParserOutputContent( $po );
 818                         }
 819                 }
 820         }
 821
 822         /**
 823          * Get the robot policy to be used for the current view
 824          * @param string $action The action= GET parameter
 825          * @param ParserOutput|null $pOutput
 826          * @return array The policy that should be set
 827          * @todo actions other than 'view'
 828          */
 829         public function getRobotPolicy( $action, $pOutput = null ) {
 830                 global $wgArticleRobotPolicies, $wgNamespaceRobotPolicies, $wgDefaultRobotPolicy;
 831
 832                 $ns = $this->getTitle()->getNamespace();
 833
 834                 # Don't index user and user talk pages for blocked users (bug 11443)
 835                 if ( ( $ns == NS_USER || $ns == NS_USER_TALK ) && !$this->getTitle()->isSubpage() ) {
 836                         $specificTarget = null;
 837                         $vagueTarget = null;
 838                         $titleText = $this->getTitle()->getText();
 839                         if ( IP::isValid( $titleText ) ) {
 840                                 $vagueTarget = $titleText;
 841                         } else {
 842                                 $specificTarget = $titleText;
 843                         }
 844                         if ( Block::newFromTarget( $specificTarget, $vagueTarget ) instanceof Block ) {
 845                                 return [
 846                                         'index' => 'noindex',
 847                                         'follow' => 'nofollow'
 848                                 ];
 849                         }
 850                 }
 851
 852                 if ( $this->mPage->getId() === 0 || $this->getOldID() ) {
 853                         # Non-articles (special pages etc), and old revisions
 854                         return [
 855                                 'index' => 'noindex',
 856                                 'follow' => 'nofollow'
 857                         ];
 858                 } elseif ( $this->getContext()->getOutput()->isPrintable() ) {
 859                         # Discourage indexing of printable versions, but encourage following
 860                         return [
 861                                 'index' => 'noindex',
 862                                 'follow' => 'follow'
 863                         ];
 864                 } elseif ( $this->getContext()->getRequest()->getInt( 'curid' ) ) {
 865                         # For ?curid=x urls, disallow indexing
 866                         return [
 867                                 'index' => 'noindex',
 868                                 'follow' => 'follow'
 869                         ];
 870                 }
 871
 872                 # Otherwise, construct the policy based on the various config variables.
 873                 $policy = self::formatRobotPolicy( $wgDefaultRobotPolicy );
 874
 875                 if ( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 876                         # Honour customised robot policies for this namespace
 877                         $policy = array_merge(
 878                                 $policy,
 879                                 self::formatRobotPolicy( $wgNamespaceRobotPolicies[$ns] )
 880                         );
 881                 }
 882                 if ( $this->getTitle()->canUseNoindex() && is_object( $pOutput ) && $pOutput->getIndexPolicy() ) {
 883                         # __INDEX__ and __NOINDEX__ magic words, if allowed. Incorporates
 884                         # a final sanity check that we have really got the parser output.
 885                         $policy = array_merge(
 886                                 $policy,
 887                                 [ 'index' => $pOutput->getIndexPolicy() ]
 888                         );
 889                 }
 890
 891                 if ( isset( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] ) ) {
 892                         # (bug 14900) site config can override user-defined __INDEX__ or __NOINDEX__
 893                         $policy = array_merge(
 894                                 $policy,
 895                                 self::formatRobotPolicy( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] )
 896                         );
 897                 }
 898
 899                 return $policy;
 900         }
 901
 902         /**
 903          * Converts a String robot policy into an associative array, to allow
 904          * merging of several policies using array_merge().
 905          * @param array|string $policy Returns empty array on null/false/'', transparent
 906          *   to already-converted arrays, converts string.
 907          * @return array 'index' => \<indexpolicy\>, 'follow' => \<followpolicy\>
 908          */
 909         public static function formatRobotPolicy( $policy ) {
 910                 if ( is_array( $policy ) ) {
 911                         return $policy;
 912                 } elseif ( !$policy ) {
 913                         return [];
 914                 }
 915
 916                 $policy = explode( ',', $policy );
 917                 $policy = array_map( 'trim', $policy );
 918
 919                 $arr = [];
 920                 foreach ( $policy as $var ) {
 921                         if ( in_array( $var, [ 'index', 'noindex' ] ) ) {
 922                                 $arr['index'] = $var;
 923                         } elseif ( in_array( $var, [ 'follow', 'nofollow' ] ) ) {
 924                                 $arr['follow'] = $var;
 925                         }
 926                 }
 927
 928                 return $arr;
 929         }
 930
 931         /**
 932          * If this request is a redirect view, send "redirected from" subtitle to
 933          * the output. Returns true if the header was needed, false if this is not
 934          * a redirect view. Handles both local and remote redirects.
 935          *
 936          * @return bool
 937          */
 938         public function showRedirectedFromHeader() {
 939                 global $wgRedirectSources;
 940
 941                 $context = $this->getContext();
 942                 $outputPage = $context->getOutput();
 943                 $request = $context->getRequest();
 944                 $rdfrom = $request->getVal( 'rdfrom' );
 945
 946                 // Construct a URL for the current page view, but with the target title
 947                 $query = $request->getValues();
 948                 unset( $query['rdfrom'] );
 949                 unset( $query['title'] );
 950                 if ( $this->getTitle()->isRedirect() ) {
 951                         // Prevent double redirects
 952                         $query['redirect'] = 'no';
 953                 }
 954                 $redirectTargetUrl = $this->getTitle()->getLinkURL( $query );
 955
 956                 if ( isset( $this->mRedirectedFrom ) ) {
 957                         // This is an internally redirected page view.
 958                         // We'll need a backlink to the source page for navigation.
 959                         if ( Hooks::run( 'ArticleViewRedirect', [ &$this ] ) ) {
 960                                 $redir = Linker::linkKnown(
 961                                         $this->mRedirectedFrom,
 962                                         null,
 963                                         [],
 964                                         [ 'redirect' => 'no' ]
 965                                 );
 966
 967                                 $outputPage->addSubtitle( "<span class=\"mw-redirectedfrom\">" .
 968                                         $context->msg( 'redirectedfrom' )->rawParams( $redir )->parse()
 969                                 . "</span>" );
 970
 971                                 // Add the script to update the displayed URL and
 972                                 // set the fragment if one was specified in the redirect
 973                                 $outputPage->addJsConfigVars( [
 974                                         'wgInternalRedirectTargetUrl' => $redirectTargetUrl,
 975                                 ] );
 976                                 $outputPage->addModules( 'mediawiki.action.view.redirect' );
 977
 978                                 // Add a <link rel="canonical"> tag
 979                                 $outputPage->setCanonicalUrl( $this->getTitle()->getCanonicalURL() );
 980
 981                                 // Tell the output object that the user arrived at this article through a redirect
 982                                 $outputPage->setRedirectedFrom( $this->mRedirectedFrom );
 983
 984                                 return true;
 985                         }
 986                 } elseif ( $rdfrom ) {
 987                         // This is an externally redirected view, from some other wiki.
 988                         // If it was reported from a trusted site, supply a backlink.
 989                         if ( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 990                                 $redir = Linker::makeExternalLink( $rdfrom, $rdfrom );
 991                                 $outputPage->addSubtitle( "<span class=\"mw-redirectedfrom\">" .
 992                                         $context->msg( 'redirectedfrom' )->rawParams( $redir )->parse()
 993                                 . "</span>" );
 994
 995                                 // Add the script to update the displayed URL
 996                                 $outputPage->addJsConfigVars( [
 997                                         'wgInternalRedirectTargetUrl' => $redirectTargetUrl,
 998                                 ] );
 999                                 $outputPage->addModules( 'mediawiki.action.view.redirect' );
1000
1001                                 return true;
1002                         }
1003                 }
1004
1005                 return false;
1006         }
1007
1008         /**
1009          * Show a header specific to the namespace currently being viewed, like
1010          * [[MediaWiki:Talkpagetext]]. For Article::view().
1011          */
1012         public function showNamespaceHeader() {
1013                 if ( $this->getTitle()->isTalkPage() ) {
1014                         if ( !wfMessage( 'talkpageheader' )->isDisabled() ) {
1015                                 $this->getContext()->getOutput()->wrapWikiMsg(
1016                                         "<div class=\"mw-talkpageheader\">\n$1\n</div>",
1017                                         [ 'talkpageheader' ]
1018                                 );
1019                         }
1020                 }
1021         }
1022
1023         /**
1024          * Show the footer section of an ordinary page view
1025          */
1026         public function showViewFooter() {
1027                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
1028                 if ( $this->getTitle()->getNamespace() == NS_USER_TALK
1029                         && IP::isValid( $this->getTitle()->getText() )
1030                 ) {
1031                         $this->getContext()->getOutput()->addWikiMsg( 'anontalkpagetext' );
1032                 }
1033
1034                 // Show a footer allowing the user to patrol the shown revision or page if possible
1035                 $patrolFooterShown = $this->showPatrolFooter();
1036
1037                 Hooks::run( 'ArticleViewFooter', [ $this, $patrolFooterShown ] );
1038         }
1039
1040         /**
1041          * If patrol is possible, output a patrol UI box. This is called from the
1042          * footer section of ordinary page views. If patrol is not possible or not
1043          * desired, does nothing.
1044          * Side effect: When the patrol link is build, this method will call
1045          * OutputPage::preventClickjacking() and load mediawiki.page.patrol.ajax.
1046          *
1047          * @return bool
1048          */
1049         public function showPatrolFooter() {
1050                 global $wgUseNPPatrol, $wgUseRCPatrol, $wgUseFilePatrol, $wgEnableAPI, $wgEnableWriteAPI;
1051
1052                 $outputPage = $this->getContext()->getOutput();
1053                 $user = $this->getContext()->getUser();
1054                 $title = $this->getTitle();
1055                 $rc = false;
1056
1057                 if ( !$title->quickUserCan( 'patrol', $user )
1058                         || !( $wgUseRCPatrol || $wgUseNPPatrol
1059                                 || ( $wgUseFilePatrol && $title->inNamespace( NS_FILE ) ) )
1060                 ) {
1061                         // Patrolling is disabled or the user isn't allowed to
1062                         return false;
1063                 }
1064
1065                 if ( $this->mRevision
1066                         && !RecentChange::isInRCLifespan( $this->mRevision->getTimestamp(), 21600 )
1067                 ) {
1068                         // The current revision is already older than what could be in the RC table
1069                         // 6h tolerance because the RC might not be cleaned out regularly
1070                         return false;
1071                 }
1072
1073                 // Check for cached results
1074                 $key = wfMemcKey( 'unpatrollable-page', $title->getArticleID() );
1075                 $cache = ObjectCache::getMainWANInstance();
1076                 if ( $cache->get( $key ) ) {
1077                         return false;
1078                 }
1079
1080                 $dbr = wfGetDB( DB_REPLICA );
1081                 $oldestRevisionTimestamp = $dbr->selectField(
1082                         'revision',
1083                         'MIN( rev_timestamp )',
1084                         [ 'rev_page' => $title->getArticleID() ],
1085                         __METHOD__
1086                 );
1087
1088                 // New page patrol: Get the timestamp of the oldest revison which
1089                 // the revision table holds for the given page. Then we look
1090                 // whether it's within the RC lifespan and if it is, we try
1091                 // to get the recentchanges row belonging to that entry
1092                 // (with rc_new = 1).
1093                 $recentPageCreation = false;
1094                 if ( $oldestRevisionTimestamp
1095                         && RecentChange::isInRCLifespan( $oldestRevisionTimestamp, 21600 )
1096                 ) {
1097                         // 6h tolerance because the RC might not be cleaned out regularly
1098                         $recentPageCreation = true;
1099                         $rc = RecentChange::newFromConds(
1100                                 [
1101                                         'rc_new' => 1,
1102                                         'rc_timestamp' => $oldestRevisionTimestamp,
1103                                         'rc_namespace' => $title->getNamespace(),
1104                                         'rc_cur_id' => $title->getArticleID()
1105                                 ],
1106                                 __METHOD__
1107                         );
1108                         if ( $rc ) {
1109                                 // Use generic patrol message for new pages
1110                                 $markPatrolledMsg = wfMessage( 'markaspatrolledtext' );
1111                         }
1112                 }
1113
1114                 // File patrol: Get the timestamp of the latest upload for this page,
1115                 // check whether it is within the RC lifespan and if it is, we try
1116                 // to get the recentchanges row belonging to that entry
1117                 // (with rc_type = RC_LOG, rc_log_type = upload).
1118                 $recentFileUpload = false;
1119                 if ( ( !$rc || $rc->getAttribute( 'rc_patrolled' ) ) && $wgUseFilePatrol
1120                         && $title->getNamespace() === NS_FILE ) {
1121                         // Retrieve timestamp of most recent upload
1122                         $newestUploadTimestamp = $dbr->selectField(
1123                                 'image',
1124                                 'MAX( img_timestamp )',
1125                                 [ 'img_name' => $title->getDBkey() ],
1126                                 __METHOD__
1127                         );
1128                         if ( $newestUploadTimestamp
1129                                 && RecentChange::isInRCLifespan( $newestUploadTimestamp, 21600 )
1130                         ) {
1131                                 // 6h tolerance because the RC might not be cleaned out regularly
1132                                 $recentFileUpload = true;
1133                                 $rc = RecentChange::newFromConds(
1134                                         [
1135                                                 'rc_type' => RC_LOG,
1136                                                 'rc_log_type' => 'upload',
1137                                                 'rc_timestamp' => $newestUploadTimestamp,
1138                                                 'rc_namespace' => NS_FILE,
1139                                                 'rc_cur_id' => $title->getArticleID()
1140                                         ],
1141                                         __METHOD__,
1142                                         [ 'USE INDEX' => 'rc_timestamp' ]
1143                                 );
1144                                 if ( $rc ) {
1145                                         // Use patrol message specific to files
1146                                         $markPatrolledMsg = wfMessage( 'markaspatrolledtext-file' );
1147                                 }
1148                         }
1149                 }
1150
1151                 if ( !$recentPageCreation && !$recentFileUpload ) {
1152                         // Page creation and latest upload (for files) is too old to be in RC
1153
1154                         // We definitely can't patrol so cache the information
1155                         // When a new file version is uploaded, the cache is cleared
1156                         $cache->set( $key, '1' );
1157
1158                         return false;
1159                 }
1160
1161                 if ( !$rc ) {
1162                         // Don't cache: This can be hit if the page gets accessed very fast after
1163                         // its creation / latest upload or in case we have high replica DB lag. In case
1164                         // the revision is too old, we will already return above.
1165                         return false;
1166                 }
1167
1168                 if ( $rc->getAttribute( 'rc_patrolled' ) ) {
1169                         // Patrolled RC entry around
1170
1171                         // Cache the information we gathered above in case we can't patrol
1172                         // Don't cache in case we can patrol as this could change
1173                         $cache->set( $key, '1' );
1174
1175                         return false;
1176                 }
1177
1178                 if ( $rc->getPerformer()->equals( $user ) ) {
1179                         // Don't show a patrol link for own creations/uploads. If the user could
1180                         // patrol them, they already would be patrolled
1181                         return false;
1182                 }
1183
1184                 $rcid = $rc->getAttribute( 'rc_id' );
1185
1186                 $token = $user->getEditToken( $rcid );
1187
1188                 $outputPage->preventClickjacking();
1189                 if ( $wgEnableAPI && $wgEnableWriteAPI && $user->isAllowed( 'writeapi' ) ) {
1190                         $outputPage->addModules( 'mediawiki.page.patrol.ajax' );
1191                 }
1192
1193                 $link = Linker::linkKnown(
1194                         $title,
1195                         $markPatrolledMsg->escaped(),
1196                         [],
1197                         [
1198                                 'action' => 'markpatrolled',
1199                                 'rcid' => $rcid,
1200                                 'token' => $token,
1201                         ]
1202                 );
1203
1204                 $outputPage->addHTML(
1205                         "<div class='patrollink' data-mw='interface'>" .
1206                                 wfMessage( 'markaspatrolledlink' )->rawParams( $link )->escaped() .
1207                         '</div>'
1208                 );
1209
1210                 return true;
1211         }
1212
1213         /**
1214          * Purge the cache used to check if it is worth showing the patrol footer
1215          * For example, it is done during re-uploads when file patrol is used.
1216          * @param int $articleID ID of the article to purge
1217          * @since 1.27
1218          */
1219         public static function purgePatrolFooterCache( $articleID ) {
1220                 $cache = ObjectCache::getMainWANInstance();
1221                 $cache->delete( wfMemcKey( 'unpatrollable-page', $articleID ) );
1222         }
1223
1224         /**
1225          * Show the error text for a missing article. For articles in the MediaWiki
1226          * namespace, show the default message text. To be called from Article::view().
1227          */
1228         public function showMissingArticle() {
1229                 global $wgSend404Code;
1230
1231                 $outputPage = $this->getContext()->getOutput();
1232                 // Whether the page is a root user page of an existing user (but not a subpage)
1233                 $validUserPage = false;
1234
1235                 $title = $this->getTitle();
1236
1237                 # Show info in user (talk) namespace. Does the user exist? Is he blocked?
1238                 if ( $title->getNamespace() == NS_USER
1239                         || $title->getNamespace() == NS_USER_TALK
1240                 ) {
1241                         $rootPart = explode( '/', $title->getText() )[0];
1242                         $user = User::newFromName( $rootPart, false /* allow IP users*/ );
1243                         $ip = User::isIP( $rootPart );
1244                         $block = Block::newFromTarget( $user, $user );
1245
1246                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
1247                                 $outputPage->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n\$1\n</div>",
1248                                         [ 'userpage-userdoesnotexist-view', wfEscapeWikiText( $rootPart ) ] );
1249                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
1250                                 # Show log extract if the user is currently blocked
1251                                 LogEventsList::showLogExtract(
1252                                         $outputPage,
1253                                         'block',
1254                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
1255                                         '',
1256                                         [
1257                                                 'lim' => 1,
1258                                                 'showIfEmpty' => false,
1259                                                 'msgKey' => [
1260                                                         'blocked-notice-logextract',
1261                                                         $user->getName() # Support GENDER in notice
1262                                                 ]
1263                                         ]
1264                                 );
1265                                 $validUserPage = !$title->isSubpage();
1266                         } else {
1267                                 $validUserPage = !$title->isSubpage();
1268                         }
1269                 }
1270
1271                 Hooks::run( 'ShowMissingArticle', [ $this ] );
1272
1273                 # Show delete and move logs if there were any such events.
1274                 # The logging query can DOS the site when bots/crawlers cause 404 floods,
1275                 # so be careful showing this. 404 pages must be cheap as they are hard to cache.
1276                 $cache = ObjectCache::getMainStashInstance();
1277                 $key = wfMemcKey( 'page-recent-delete', md5( $title->getPrefixedText() ) );
1278                 $loggedIn = $this->getContext()->getUser()->isLoggedIn();
1279                 if ( $loggedIn || $cache->get( $key ) ) {
1280                         $logTypes = [ 'delete', 'move' ];
1281                         $conds = [ "log_action != 'revision'" ];
1282                         // Give extensions a chance to hide their (unrelated) log entries
1283                         Hooks::run( 'Article::MissingArticleConditions', [ &$conds, $logTypes ] );
1284                         LogEventsList::showLogExtract(
1285                                 $outputPage,
1286                                 $logTypes,
1287                                 $title,
1288                                 '',
1289                                 [
1290                                         'lim' => 10,
1291                                         'conds' => $conds,
1292                                         'showIfEmpty' => false,
1293                                         'msgKey' => [ $loggedIn
1294                                                 ? 'moveddeleted-notice'
1295                                                 : 'moveddeleted-notice-recent'
1296                                         ]
1297                                 ]
1298                         );
1299                 }
1300
1301                 if ( !$this->mPage->hasViewableContent() && $wgSend404Code && !$validUserPage ) {
1302                         // If there's no backing content, send a 404 Not Found
1303                         // for better machine handling of broken links.
1304                         $this->getContext()->getRequest()->response()->statusHeader( 404 );
1305                 }
1306
1307                 // Also apply the robot policy for nonexisting pages (even if a 404 was used for sanity)
1308                 $policy = $this->getRobotPolicy( 'view' );
1309                 $outputPage->setIndexPolicy( $policy['index'] );
1310                 $outputPage->setFollowPolicy( $policy['follow'] );
1311
1312                 $hookResult = Hooks::run( 'BeforeDisplayNoArticleText', [ $this ] );
1313
1314                 if ( !$hookResult ) {
1315                         return;
1316                 }
1317
1318                 # Show error message
1319                 $oldid = $this->getOldID();
1320                 if ( !$oldid && $title->getNamespace() === NS_MEDIAWIKI && $title->hasSourceText() ) {
1321                         $outputPage->addParserOutput( $this->getContentObject()->getParserOutput( $title ) );
1322                 } else {
1323                         if ( $oldid ) {
1324                                 $text = wfMessage( 'missing-revision', $oldid )->plain();
1325                         } elseif ( $title->quickUserCan( 'create', $this->getContext()->getUser() )
1326                                 && $title->quickUserCan( 'edit', $this->getContext()->getUser() )
1327                         ) {
1328                                 $message = $this->getContext()->getUser()->isLoggedIn() ? 'noarticletext' : 'noarticletextanon';
1329                                 $text = wfMessage( $message )->plain();
1330                         } else {
1331                                 $text = wfMessage( 'noarticletext-nopermission' )->plain();
1332                         }
1333
1334                         $dir = $this->getContext()->getLanguage()->getDir();
1335                         $lang = $this->getContext()->getLanguage()->getCode();
1336                         $outputPage->addWikiText( Xml::openElement( 'div', [
1337                                 'class' => "noarticletext mw-content-$dir",
1338                                 'dir' => $dir,
1339                                 'lang' => $lang,
1340                         ] ) . "\n$text\n</div>" );
1341                 }
1342         }
1343
1344         /**
1345          * If the revision requested for view is deleted, check permissions.
1346          * Send either an error message or a warning header to the output.
1347          *
1348          * @return bool True if the view is allowed, false if not.
1349          */
1350         public function showDeletedRevisionHeader() {
1351                 if ( !$this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1352                         // Not deleted
1353                         return true;
1354                 }
1355
1356                 $outputPage = $this->getContext()->getOutput();
1357                 $user = $this->getContext()->getUser();
1358                 // If the user is not allowed to see it...
1359                 if ( !$this->mRevision->userCan( Revision::DELETED_TEXT, $user ) ) {
1360                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1361                                 'rev-deleted-text-permission' );
1362
1363                         return false;
1364                 // If the user needs to confirm that they want to see it...
1365                 } elseif ( $this->getContext()->getRequest()->getInt( 'unhide' ) != 1 ) {
1366                         # Give explanation and add a link to view the revision...
1367                         $oldid = intval( $this->getOldID() );
1368                         $link = $this->getTitle()->getFullURL( "oldid={$oldid}&unhide=1" );
1369                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1370                                 'rev-suppressed-text-unhide' : 'rev-deleted-text-unhide';
1371                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1372                                 [ $msg, $link ] );
1373
1374                         return false;
1375                 // We are allowed to see...
1376                 } else {
1377                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1378                                 'rev-suppressed-text-view' : 'rev-deleted-text-view';
1379                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", $msg );
1380
1381                         return true;
1382                 }
1383         }
1384
1385         /**
1386          * Generate the navigation links when browsing through an article revisions
1387          * It shows the information as:
1388          *   Revision as of \<date\>; view current revision
1389          *   \<- Previous version | Next Version -\>
1390          *
1391          * @param int $oldid Revision ID of this article revision
1392          */
1393         public function setOldSubtitle( $oldid = 0 ) {
1394                 if ( !Hooks::run( 'DisplayOldSubtitle', [ &$this, &$oldid ] ) ) {
1395                         return;
1396                 }
1397
1398                 $context = $this->getContext();
1399                 $unhide = $context->getRequest()->getInt( 'unhide' ) == 1;
1400
1401                 # Cascade unhide param in links for easy deletion browsing
1402                 $extraParams = [];
1403                 if ( $unhide ) {
1404                         $extraParams['unhide'] = 1;
1405                 }
1406
1407                 if ( $this->mRevision && $this->mRevision->getId() === $oldid ) {
1408                         $revision = $this->mRevision;
1409                 } else {
1410                         $revision = Revision::newFromId( $oldid );
1411                 }
1412
1413                 $timestamp = $revision->getTimestamp();
1414
1415                 $current = ( $oldid == $this->mPage->getLatest() );
1416                 $language = $context->getLanguage();
1417                 $user = $context->getUser();
1418
1419                 $td = $language->userTimeAndDate( $timestamp, $user );
1420                 $tddate = $language->userDate( $timestamp, $user );
1421                 $tdtime = $language->userTime( $timestamp, $user );
1422
1423                 # Show user links if allowed to see them. If hidden, then show them only if requested...
1424                 $userlinks = Linker::revUserTools( $revision, !$unhide );
1425
1426                 $infomsg = $current && !$context->msg( 'revision-info-current' )->isDisabled()
1427                         ? 'revision-info-current'
1428                         : 'revision-info';
1429
1430                 $outputPage = $context->getOutput();
1431                 $revisionInfo = "<div id=\"mw-{$infomsg}\">" .
1432                         $context->msg( $infomsg, $td )
1433                                 ->rawParams( $userlinks )
1434                                 ->params( $revision->getId(), $tddate, $tdtime, $revision->getUserText() )
1435                                 ->rawParams( Linker::revComment( $revision, true, true ) )
1436                                 ->parse() .
1437                         "</div>";
1438
1439                 $lnk = $current
1440                         ? $context->msg( 'currentrevisionlink' )->escaped()
1441                         : Linker::linkKnown(
1442                                 $this->getTitle(),
1443                                 $context->msg( 'currentrevisionlink' )->escaped(),
1444                                 [],
1445                                 $extraParams
1446                         );
1447                 $curdiff = $current
1448                         ? $context->msg( 'diff' )->escaped()
1449                         : Linker::linkKnown(
1450                                 $this->getTitle(),
1451                                 $context->msg( 'diff' )->escaped(),
1452                                 [],
1453                                 [
1454                                         'diff' => 'cur',
1455                                         'oldid' => $oldid
1456                                 ] + $extraParams
1457                         );
1458                 $prev = $this->getTitle()->getPreviousRevisionID( $oldid );
1459                 $prevlink = $prev
1460                         ? Linker::linkKnown(
1461                                 $this->getTitle(),
1462                                 $context->msg( 'previousrevision' )->escaped(),
1463                                 [],
1464                                 [
1465                                         'direction' => 'prev',
1466                                         'oldid' => $oldid
1467                                 ] + $extraParams
1468                         )
1469                         : $context->msg( 'previousrevision' )->escaped();
1470                 $prevdiff = $prev
1471                         ? Linker::linkKnown(
1472                                 $this->getTitle(),
1473                                 $context->msg( 'diff' )->escaped(),
1474                                 [],
1475                                 [
1476                                         'diff' => 'prev',
1477                                         'oldid' => $oldid
1478                                 ] + $extraParams
1479                         )
1480                         : $context->msg( 'diff' )->escaped();
1481                 $nextlink = $current
1482                         ? $context->msg( 'nextrevision' )->escaped()
1483                         : Linker::linkKnown(
1484                                 $this->getTitle(),
1485                                 $context->msg( 'nextrevision' )->escaped(),
1486                                 [],
1487                                 [
1488                                         'direction' => 'next',
1489                                         'oldid' => $oldid
1490                                 ] + $extraParams
1491                         );
1492                 $nextdiff = $current
1493                         ? $context->msg( 'diff' )->escaped()
1494                         : Linker::linkKnown(
1495                                 $this->getTitle(),
1496                                 $context->msg( 'diff' )->escaped(),
1497                                 [],
1498                                 [
1499                                         'diff' => 'next',
1500                                         'oldid' => $oldid
1501                                 ] + $extraParams
1502                         );
1503
1504                 $cdel = Linker::getRevDeleteLink( $user, $revision, $this->getTitle() );
1505                 if ( $cdel !== '' ) {
1506                         $cdel .= ' ';
1507                 }
1508
1509                 // the outer div is need for styling the revision info and nav in MobileFrontend
1510                 $outputPage->addSubtitle( "<div class=\"mw-revision\">" . $revisionInfo .
1511                         "<div id=\"mw-revision-nav\">" . $cdel .
1512                         $context->msg( 'revision-nav' )->rawParams(
1513                                 $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff
1514                         )->escaped() . "</div></div>" );
1515         }
1516
1517         /**
1518          * Return the HTML for the top of a redirect page
1519          *
1520          * Chances are you should just be using the ParserOutput from
1521          * WikitextContent::getParserOutput instead of calling this for redirects.
1522          *
1523          * @param Title|array $target Destination(s) to redirect
1524          * @param bool $appendSubtitle [optional]
1525          * @param bool $forceKnown Should the image be shown as a bluelink regardless of existence?
1526          * @return string Containing HTML with redirect link
1527          */
1528         public function viewRedirect( $target, $appendSubtitle = true, $forceKnown = false ) {
1529                 $lang = $this->getTitle()->getPageLanguage();
1530                 $out = $this->getContext()->getOutput();
1531                 if ( $appendSubtitle ) {
1532                         $out->addSubtitle( wfMessage( 'redirectpagesub' ) );
1533                 }
1534                 $out->addModuleStyles( 'mediawiki.action.view.redirectPage' );
1535                 return static::getRedirectHeaderHtml( $lang, $target, $forceKnown );
1536         }
1537
1538         /**
1539          * Return the HTML for the top of a redirect page
1540          *
1541          * Chances are you should just be using the ParserOutput from
1542          * WikitextContent::getParserOutput instead of calling this for redirects.
1543          *
1544          * @since 1.23
1545          * @param Language $lang
1546          * @param Title|array $target Destination(s) to redirect
1547          * @param bool $forceKnown Should the image be shown as a bluelink regardless of existence?
1548          * @return string Containing HTML with redirect link
1549          */
1550         public static function getRedirectHeaderHtml( Language $lang, $target, $forceKnown = false ) {
1551                 if ( !is_array( $target ) ) {
1552                         $target = [ $target ];
1553                 }
1554
1555                 $html = '<ul class="redirectText">';
1556                 /** @var Title $title */
1557                 foreach ( $target as $title ) {
1558                         $html .= '<li>' . Linker::link(
1559                                 $title,
1560                                 htmlspecialchars( $title->getFullText() ),
1561                                 [],
1562                                 // Make sure wiki page redirects are not followed
1563                                 $title->isRedirect() ? [ 'redirect' => 'no' ] : [],
1564                                 ( $forceKnown ? [ 'known', 'noclasses' ] : [] )
1565                         ) . '</li>';
1566                 }
1567                 $html .= '</ul>';
1568
1569                 $redirectToText = wfMessage( 'redirectto' )->inLanguage( $lang )->escaped();
1570
1571                 return '<div class="redirectMsg">' .
1572                         '<p>' . $redirectToText . '</p>' .
1573                         $html .
1574                         '</div>';
1575         }
1576
1577         /**
1578          * Adds help link with an icon via page indicators.
1579          * Link target can be overridden by a local message containing a wikilink:
1580          * the message key is: 'namespace-' + namespace number + '-helppage'.
1581          * @param string $to Target MediaWiki.org page title or encoded URL.
1582          * @param bool $overrideBaseUrl Whether $url is a full URL, to avoid MW.o.
1583          * @since 1.25
1584          */
1585         public function addHelpLink( $to, $overrideBaseUrl = false ) {
1586                 $msg = wfMessage(
1587                         'namespace-' . $this->getTitle()->getNamespace() . '-helppage'
1588                 );
1589
1590                 $out = $this->getContext()->getOutput();
1591                 if ( !$msg->isDisabled() ) {
1592                         $helpUrl = Skin::makeUrl( $msg->plain() );
1593                         $out->addHelpLink( $helpUrl, true );
1594                 } else {
1595                         $out->addHelpLink( $to, $overrideBaseUrl );
1596                 }
1597         }
1598
1599         /**
1600          * Handle action=render
1601          */
1602         public function render() {
1603                 $this->getContext()->getRequest()->response()->header( 'X-Robots-Tag: noindex' );
1604                 $this->getContext()->getOutput()->setArticleBodyOnly( true );
1605                 $this->getContext()->getOutput()->enableSectionEditLinks( false );
1606                 $this->view();
1607         }
1608
1609         /**
1610          * action=protect handler
1611          */
1612         public function protect() {
1613                 $form = new ProtectionForm( $this );
1614                 $form->execute();
1615         }
1616
1617         /**
1618          * action=unprotect handler (alias)
1619          */
1620         public function unprotect() {
1621                 $this->protect();
1622         }
1623
1624         /**
1625          * UI entry point for page deletion
1626          */
1627         public function delete() {
1628                 # This code desperately needs to be totally rewritten
1629
1630                 $title = $this->getTitle();
1631                 $context = $this->getContext();
1632                 $user = $context->getUser();
1633                 $request = $context->getRequest();
1634
1635                 # Check permissions
1636                 $permissionErrors = $title->getUserPermissionsErrors( 'delete', $user );
1637                 if ( count( $permissionErrors ) ) {
1638                         throw new PermissionsError( 'delete', $permissionErrors );
1639                 }
1640
1641                 # Read-only check...
1642                 if ( wfReadOnly() ) {
1643                         throw new ReadOnlyError;
1644                 }
1645
1646                 # Better double-check that it hasn't been deleted yet!
1647                 $this->mPage->loadPageData(
1648                         $request->wasPosted() ? WikiPage::READ_LATEST : WikiPage::READ_NORMAL
1649                 );
1650                 if ( !$this->mPage->exists() ) {
1651                         $deleteLogPage = new LogPage( 'delete' );
1652                         $outputPage = $context->getOutput();
1653                         $outputPage->setPageTitle( $context->msg( 'cannotdelete-title', $title->getPrefixedText() ) );
1654                         $outputPage->wrapWikiMsg( "<div class=\"error mw-error-cannotdelete\">\n$1\n</div>",
1655                                         [ 'cannotdelete', wfEscapeWikiText( $title->getPrefixedText() ) ]
1656                                 );
1657                         $outputPage->addHTML(
1658                                 Xml::element( 'h2', null, $deleteLogPage->getName()->text() )
1659                         );
1660                         LogEventsList::showLogExtract(
1661                                 $outputPage,
1662                                 'delete',
1663                                 $title
1664                         );
1665
1666                         return;
1667                 }
1668
1669                 $deleteReasonList = $request->getText( 'wpDeleteReasonList', 'other' );
1670                 $deleteReason = $request->getText( 'wpReason' );
1671
1672                 if ( $deleteReasonList == 'other' ) {
1673                         $reason = $deleteReason;
1674                 } elseif ( $deleteReason != '' ) {
1675                         // Entry from drop down menu + additional comment
1676                         $colonseparator = wfMessage( 'colon-separator' )->inContentLanguage()->text();
1677                         $reason = $deleteReasonList . $colonseparator . $deleteReason;
1678                 } else {
1679                         $reason = $deleteReasonList;
1680                 }
1681
1682                 if ( $request->wasPosted() && $user->matchEditToken( $request->getVal( 'wpEditToken' ),
1683                         [ 'delete', $this->getTitle()->getPrefixedText() ] )
1684                 ) {
1685                         # Flag to hide all contents of the archived revisions
1686                         $suppress = $request->getVal( 'wpSuppress' ) && $user->isAllowed( 'suppressrevision' );
1687
1688                         $this->doDelete( $reason, $suppress );
1689
1690                         WatchAction::doWatchOrUnwatch( $request->getCheck( 'wpWatch' ), $title, $user );
1691
1692                         return;
1693                 }
1694
1695                 // Generate deletion reason
1696                 $hasHistory = false;
1697                 if ( !$reason ) {
1698                         try {
1699                                 $reason = $this->generateReason( $hasHistory );
1700                         } catch ( Exception $e ) {
1701                                 # if a page is horribly broken, we still want to be able to
1702                                 # delete it. So be lenient about errors here.
1703                                 wfDebug( "Error while building auto delete summary: $e" );
1704                                 $reason = '';
1705                         }
1706                 }
1707
1708                 // If the page has a history, insert a warning
1709                 if ( $hasHistory ) {
1710                         $title = $this->getTitle();
1711
1712                         // The following can use the real revision count as this is only being shown for users
1713                         // that can delete this page.
1714                         // This, as a side-effect, also makes sure that the following query isn't being run for
1715                         // pages with a larger history, unless the user has the 'bigdelete' right
1716                         // (and is about to delete this page).
1717                         $dbr = wfGetDB( DB_REPLICA );
1718                         $revisions = $edits = (int)$dbr->selectField(
1719                                 'revision',
1720                                 'COUNT(rev_page)',
1721                                 [ 'rev_page' => $title->getArticleID() ],
1722                                 __METHOD__
1723                         );
1724
1725                         // @todo FIXME: i18n issue/patchwork message
1726                         $context->getOutput()->addHTML(
1727                                 '<strong class="mw-delete-warning-revisions">' .
1728                                 $context->msg( 'historywarning' )->numParams( $revisions )->parse() .
1729                                 $context->msg( 'word-separator' )->escaped() . Linker::linkKnown( $title,
1730                                         $context->msg( 'history' )->escaped(),
1731                                         [],
1732                                         [ 'action' => 'history' ] ) .
1733                                 '</strong>'
1734                         );
1735
1736                         if ( $title->isBigDeletion() ) {
1737                                 global $wgDeleteRevisionsLimit;
1738                                 $context->getOutput()->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
1739                                         [
1740                                                 'delete-warning-toobig',
1741                                                 $context->getLanguage()->formatNum( $wgDeleteRevisionsLimit )
1742                                         ]
1743                                 );
1744                         }
1745                 }
1746
1747                 $this->confirmDelete( $reason );
1748         }
1749
1750         /**
1751          * Output deletion confirmation dialog
1752          * @todo FIXME: Move to another file?
1753          * @param string $reason Prefilled reason
1754          */
1755         public function confirmDelete( $reason ) {
1756                 wfDebug( "Article::confirmDelete\n" );
1757
1758                 $title = $this->getTitle();
1759                 $ctx = $this->getContext();
1760                 $outputPage = $ctx->getOutput();
1761                 $useMediaWikiUIEverywhere = $ctx->getConfig()->get( 'UseMediaWikiUIEverywhere' );
1762                 $outputPage->setPageTitle( wfMessage( 'delete-confirm', $title->getPrefixedText() ) );
1763                 $outputPage->addBacklinkSubtitle( $title );
1764                 $outputPage->setRobotPolicy( 'noindex,nofollow' );
1765                 $backlinkCache = $title->getBacklinkCache();
1766                 if ( $backlinkCache->hasLinks( 'pagelinks' ) || $backlinkCache->hasLinks( 'templatelinks' ) ) {
1767                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1768                                 'deleting-backlinks-warning' );
1769                 }
1770                 $outputPage->addWikiMsg( 'confirmdeletetext' );
1771
1772                 Hooks::run( 'ArticleConfirmDelete', [ $this, $outputPage, &$reason ] );
1773
1774                 $user = $this->getContext()->getUser();
1775
1776                 if ( $user->isAllowed( 'suppressrevision' ) ) {
1777                         $suppress = Html::openElement( 'div', [ 'id' => 'wpDeleteSuppressRow' ] ) .
1778                                 Xml::checkLabel( wfMessage( 'revdelete-suppress' )->text(),
1779                                         'wpSuppress', 'wpSuppress', false, [ 'tabindex' => '4' ] ) .
1780                                 Html::closeElement( 'div' );
1781                 } else {
1782                         $suppress = '';
1783                 }
1784                 $checkWatch = $user->getBoolOption( 'watchdeletion' ) || $user->isWatched( $title );
1785
1786                 $form = Html::openElement( 'form', [ 'method' => 'post',
1787                         'action' => $title->getLocalURL( 'action=delete' ), 'id' => 'deleteconfirm' ] ) .
1788                         Html::openElement( 'fieldset', [ 'id' => 'mw-delete-table' ] ) .
1789                         Html::element( 'legend', null, wfMessage( 'delete-legend' )->text() ) .
1790                         Html::openElement( 'div', [ 'id' => 'mw-deleteconfirm-table' ] ) .
1791                         Html::openElement( 'div', [ 'id' => 'wpDeleteReasonListRow' ] ) .
1792                         Html::label( wfMessage( 'deletecomment' )->text(), 'wpDeleteReasonList' ) .
1793                         '&nbsp;' .
1794                         Xml::listDropDown(
1795                                 'wpDeleteReasonList',
1796                                 wfMessage( 'deletereason-dropdown' )->inContentLanguage()->text(),
1797                                 wfMessage( 'deletereasonotherlist' )->inContentLanguage()->text(),
1798                                 '',
1799                                 'wpReasonDropDown',
1800                                 1
1801                         ) .
1802                         Html::closeElement( 'div' ) .
1803                         Html::openElement( 'div', [ 'id' => 'wpDeleteReasonRow' ] ) .
1804                         Html::label( wfMessage( 'deleteotherreason' )->text(), 'wpReason' ) .
1805                         '&nbsp;' .
1806                         Html::input( 'wpReason', $reason, 'text', [
1807                                 'size' => '60',
1808                                 'maxlength' => '255',
1809                                 'tabindex' => '2',
1810                                 'id' => 'wpReason',
1811                                 'class' => 'mw-ui-input-inline',
1812                                 'autofocus'
1813                         ] ) .
1814                         Html::closeElement( 'div' );
1815
1816                 # Disallow watching if user is not logged in
1817                 if ( $user->isLoggedIn() ) {
1818                         $form .=
1819                                         Xml::checkLabel( wfMessage( 'watchthis' )->text(),
1820                                                 'wpWatch', 'wpWatch', $checkWatch, [ 'tabindex' => '3' ] );
1821                 }
1822
1823                 $form .=
1824                                 Html::openElement( 'div' ) .
1825                                 $suppress .
1826                                         Xml::submitButton( wfMessage( 'deletepage' )->text(),
1827                                                 [
1828                                                         'name' => 'wpConfirmB',
1829                                                         'id' => 'wpConfirmB',
1830                                                         'tabindex' => '5',
1831                                                         'class' => $useMediaWikiUIEverywhere ? 'mw-ui-button mw-ui-destructive' : '',
1832                                                 ]
1833                                         ) .
1834                                 Html::closeElement( 'div' ) .
1835                         Html::closeElement( 'div' ) .
1836                         Xml::closeElement( 'fieldset' ) .
1837                         Html::hidden(
1838                                 'wpEditToken',
1839                                 $user->getEditToken( [ 'delete', $title->getPrefixedText() ] )
1840                         ) .
1841                         Xml::closeElement( 'form' );
1842
1843                         if ( $user->isAllowed( 'editinterface' ) ) {
1844                                 $link = Linker::linkKnown(
1845                                         $ctx->msg( 'deletereason-dropdown' )->inContentLanguage()->getTitle(),
1846                                         wfMessage( 'delete-edit-reasonlist' )->escaped(),
1847                                         [],
1848                                         [ 'action' => 'edit' ]
1849                                 );
1850                                 $form .= '<p class="mw-delete-editreasons">' . $link . '</p>';
1851                         }
1852
1853                 $outputPage->addHTML( $form );
1854
1855                 $deleteLogPage = new LogPage( 'delete' );
1856                 $outputPage->addHTML( Xml::element( 'h2', null, $deleteLogPage->getName()->text() ) );
1857                 LogEventsList::showLogExtract( $outputPage, 'delete', $title );
1858         }
1859
1860         /**
1861          * Perform a deletion and output success or failure messages
1862          * @param string $reason
1863          * @param bool $suppress
1864          */
1865         public function doDelete( $reason, $suppress = false ) {
1866                 $error = '';
1867                 $context = $this->getContext();
1868                 $outputPage = $context->getOutput();
1869                 $user = $context->getUser();
1870                 $status = $this->mPage->doDeleteArticleReal( $reason, $suppress, 0, true, $error, $user );
1871
1872                 if ( $status->isGood() ) {
1873                         $deleted = $this->getTitle()->getPrefixedText();
1874
1875                         $outputPage->setPageTitle( wfMessage( 'actioncomplete' ) );
1876                         $outputPage->setRobotPolicy( 'noindex,nofollow' );
1877
1878                         $loglink = '[[Special:Log/delete|' . wfMessage( 'deletionlog' )->text() . ']]';
1879
1880                         $outputPage->addWikiMsg( 'deletedtext', wfEscapeWikiText( $deleted ), $loglink );
1881
1882                         Hooks::run( 'ArticleDeleteAfterSuccess', [ $this->getTitle(), $outputPage ] );
1883
1884                         $outputPage->returnToMain( false );
1885                 } else {
1886                         $outputPage->setPageTitle(
1887                                 wfMessage( 'cannotdelete-title',
1888                                         $this->getTitle()->getPrefixedText() )
1889                         );
1890
1891                         if ( $error == '' ) {
1892                                 $outputPage->addWikiText(
1893                                         "<div class=\"error mw-error-cannotdelete\">\n" . $status->getWikiText() . "\n</div>"
1894                                 );
1895                                 $deleteLogPage = new LogPage( 'delete' );
1896                                 $outputPage->addHTML( Xml::element( 'h2', null, $deleteLogPage->getName()->text() ) );
1897
1898                                 LogEventsList::showLogExtract(
1899                                         $outputPage,
1900                                         'delete',
1901                                         $this->getTitle()
1902                                 );
1903                         } else {
1904                                 $outputPage->addHTML( $error );
1905                         }
1906                 }
1907         }
1908
1909         /* Caching functions */
1910
1911         /**
1912          * checkLastModified returns true if it has taken care of all
1913          * output to the client that is necessary for this request.
1914          * (that is, it has sent a cached version of the page)
1915          *
1916          * @return bool True if cached version send, false otherwise
1917          */
1918         protected function tryFileCache() {
1919                 static $called = false;
1920
1921                 if ( $called ) {
1922                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
1923                         return false;
1924                 }
1925
1926                 $called = true;
1927                 if ( $this->isFileCacheable() ) {
1928                         $cache = new HTMLFileCache( $this->getTitle(), 'view' );
1929                         if ( $cache->isCacheGood( $this->mPage->getTouched() ) ) {
1930                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
1931                                 $cache->loadFromFileCache( $this->getContext() );
1932                                 return true;
1933                         } else {
1934                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
1935                                 ob_start( [ &$cache, 'saveToFileCache' ] );
1936                         }
1937                 } else {
1938                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
1939                 }
1940
1941                 return false;
1942         }
1943
1944         /**
1945          * Check if the page can be cached
1946          * @param integer $mode One of the HTMLFileCache::MODE_* constants (since 1.28)
1947          * @return bool
1948          */
1949         public function isFileCacheable( $mode = HTMLFileCache::MODE_NORMAL ) {
1950                 $cacheable = false;
1951
1952                 if ( HTMLFileCache::useFileCache( $this->getContext(), $mode ) ) {
1953                         $cacheable = $this->mPage->getId()
1954                                 && !$this->mRedirectedFrom && !$this->getTitle()->isRedirect();
1955                         // Extension may have reason to disable file caching on some pages.
1956                         if ( $cacheable ) {
1957                                 $cacheable = Hooks::run( 'IsFileCacheable', [ &$this ] );
1958                         }
1959                 }
1960
1961                 return $cacheable;
1962         }
1963
1964         /**#@-*/
1965
1966         /**
1967          * Lightweight method to get the parser output for a page, checking the parser cache
1968          * and so on. Doesn't consider most of the stuff that WikiPage::view is forced to
1969          * consider, so it's not appropriate to use there.
1970          *
1971          * @since 1.16 (r52326) for LiquidThreads
1972          *
1973          * @param int|null $oldid Revision ID or null
1974          * @param User $user The relevant user
1975          * @return ParserOutput|bool ParserOutput or false if the given revision ID is not found
1976          */
1977         public function getParserOutput( $oldid = null, User $user = null ) {
1978                 // XXX: bypasses mParserOptions and thus setParserOptions()
1979
1980                 if ( $user === null ) {
1981                         $parserOptions = $this->getParserOptions();
1982                 } else {
1983                         $parserOptions = $this->mPage->makeParserOptions( $user );
1984                 }
1985
1986                 return $this->mPage->getParserOutput( $parserOptions, $oldid );
1987         }
1988
1989         /**
1990          * Override the ParserOptions used to render the primary article wikitext.
1991          *
1992          * @param ParserOptions $options
1993          * @throws MWException If the parser options where already initialized.
1994          */
1995         public function setParserOptions( ParserOptions $options ) {
1996                 if ( $this->mParserOptions ) {
1997                         throw new MWException( "can't change parser options after they have already been set" );
1998                 }
1999
2000                 // clone, so if $options is modified later, it doesn't confuse the parser cache.
2001                 $this->mParserOptions = clone $options;
2002         }
2003
2004         /**
2005          * Get parser options suitable for rendering the primary article wikitext
2006          * @return ParserOptions
2007          */
2008         public function getParserOptions() {
2009                 if ( !$this->mParserOptions ) {
2010                         $this->mParserOptions = $this->mPage->makeParserOptions( $this->getContext() );
2011                 }
2012                 // Clone to allow modifications of the return value without affecting cache
2013                 return clone $this->mParserOptions;
2014         }
2015
2016         /**
2017          * Sets the context this Article is executed in
2018          *
2019          * @param IContextSource $context
2020          * @since 1.18
2021          */
2022         public function setContext( $context ) {
2023                 $this->mContext = $context;
2024         }
2025
2026         /**
2027          * Gets the context this Article is executed in
2028          *
2029          * @return IContextSource
2030          * @since 1.18
2031          */
2032         public function getContext() {
2033                 if ( $this->mContext instanceof IContextSource ) {
2034                         return $this->mContext;
2035                 } else {
2036                         wfDebug( __METHOD__ . " called and \$mContext is null. " .
2037                                 "Return RequestContext::getMain(); for sanity\n" );
2038                         return RequestContext::getMain();
2039                 }
2040         }
2041
2042         /**
2043          * Use PHP's magic __get handler to handle accessing of
2044          * raw WikiPage fields for backwards compatibility.
2045          *
2046          * @param string $fname Field name
2047          * @return mixed
2048          */
2049         public function __get( $fname ) {
2050                 if ( property_exists( $this->mPage, $fname ) ) {
2051                         # wfWarn( "Access to raw $fname field " . __CLASS__ );
2052                         return $this->mPage->$fname;
2053                 }
2054                 trigger_error( 'Inaccessible property via __get(): ' . $fname, E_USER_NOTICE );
2055         }
2056
2057         /**
2058          * Use PHP's magic __set handler to handle setting of
2059          * raw WikiPage fields for backwards compatibility.
2060          *
2061          * @param string $fname Field name
2062          * @param mixed $fvalue New value
2063          */
2064         public function __set( $fname, $fvalue ) {
2065                 if ( property_exists( $this->mPage, $fname ) ) {
2066                         # wfWarn( "Access to raw $fname field of " . __CLASS__ );
2067                         $this->mPage->$fname = $fvalue;
2068                 // Note: extensions may want to toss on new fields
2069                 } elseif ( !in_array( $fname, [ 'mContext', 'mPage' ] ) ) {
2070                         $this->mPage->$fname = $fvalue;
2071                 } else {
2072                         trigger_error( 'Inaccessible property via __set(): ' . $fname, E_USER_NOTICE );
2073                 }
2074         }
2075
2076         /**
2077          * Call to WikiPage function for backwards compatibility.
2078          * @see WikiPage::checkFlags
2079          */
2080         public function checkFlags( $flags ) {
2081                 return $this->mPage->checkFlags( $flags );
2082         }
2083
2084         /**
2085          * Call to WikiPage function for backwards compatibility.
2086          * @see WikiPage::checkTouched
2087          */
2088         public function checkTouched() {
2089                 return $this->mPage->checkTouched();
2090         }
2091
2092         /**
2093          * Call to WikiPage function for backwards compatibility.
2094          * @see WikiPage::clearPreparedEdit
2095          */
2096         public function clearPreparedEdit() {
2097                 $this->mPage->clearPreparedEdit();
2098         }
2099
2100         /**
2101          * Call to WikiPage function for backwards compatibility.
2102          * @see WikiPage::doDeleteArticleReal
2103          */
2104         public function doDeleteArticleReal(
2105                 $reason, $suppress = false, $u1 = null, $u2 = null, &$error = '', User $user = null,
2106                 $tags = []
2107         ) {
2108                 return $this->mPage->doDeleteArticleReal(
2109                         $reason, $suppress, $u1, $u2, $error, $user, $tags
2110                 );
2111         }
2112
2113         /**
2114          * Call to WikiPage function for backwards compatibility.
2115          * @see WikiPage::doDeleteUpdates
2116          */
2117         public function doDeleteUpdates( $id, Content $content = null ) {
2118                 return $this->mPage->doDeleteUpdates( $id, $content );
2119         }
2120
2121         /**
2122          * Call to WikiPage function for backwards compatibility.
2123          * @see WikiPage::doEdit
2124          *
2125          * @deprecated since 1.21: use doEditContent() instead.
2126          */
2127         public function doEdit( $text, $summary, $flags = 0, $baseRevId = false, $user = null ) {
2128                 wfDeprecated( __METHOD__, '1.21' );
2129                 return $this->mPage->doEdit( $text, $summary, $flags, $baseRevId, $user );
2130         }
2131
2132         /**
2133          * Call to WikiPage function for backwards compatibility.
2134          * @see WikiPage::doEditContent
2135          */
2136         public function doEditContent( Content $content, $summary, $flags = 0, $baseRevId = false,
2137                 User $user = null, $serialFormat = null
2138         ) {
2139                 return $this->mPage->doEditContent( $content, $summary, $flags, $baseRevId,
2140                         $user, $serialFormat
2141                 );
2142         }
2143
2144         /**
2145          * Call to WikiPage function for backwards compatibility.
2146          * @see WikiPage::doEditUpdates
2147          */
2148         public function doEditUpdates( Revision $revision, User $user, array $options = [] ) {
2149                 return $this->mPage->doEditUpdates( $revision, $user, $options );
2150         }
2151
2152         /**
2153          * Call to WikiPage function for backwards compatibility.
2154          * @see WikiPage::doPurge
2155          */
2156         public function doPurge( $flags = WikiPage::PURGE_ALL ) {
2157                 return $this->mPage->doPurge( $flags );
2158         }
2159
2160         /**
2161          * Call to WikiPage function for backwards compatibility.
2162          * @see WikiPage::getLastPurgeTimestamp
2163          */
2164         public function getLastPurgeTimestamp() {
2165                 return $this->mPage->getLastPurgeTimestamp();
2166         }
2167
2168         /**
2169          * Call to WikiPage function for backwards compatibility.
2170          * @see WikiPage::doViewUpdates
2171          */
2172         public function doViewUpdates( User $user, $oldid = 0 ) {
2173                 $this->mPage->doViewUpdates( $user, $oldid );
2174         }
2175
2176         /**
2177          * Call to WikiPage function for backwards compatibility.
2178          * @see WikiPage::exists
2179          */
2180         public function exists() {
2181                 return $this->mPage->exists();
2182         }
2183
2184         /**
2185          * Call to WikiPage function for backwards compatibility.
2186          * @see WikiPage::followRedirect
2187          */
2188         public function followRedirect() {
2189                 return $this->mPage->followRedirect();
2190         }
2191
2192         /**
2193          * Call to WikiPage function for backwards compatibility.
2194          * @see ContentHandler::getActionOverrides
2195          */
2196         public function getActionOverrides() {
2197                 return $this->mPage->getActionOverrides();
2198         }
2199
2200         /**
2201          * Call to WikiPage function for backwards compatibility.
2202          * @see WikiPage::getAutoDeleteReason
2203          */
2204         public function getAutoDeleteReason( &$hasHistory ) {
2205                 return $this->mPage->getAutoDeleteReason( $hasHistory );
2206         }
2207
2208         /**
2209          * Call to WikiPage function for backwards compatibility.
2210          * @see WikiPage::getCategories
2211          */
2212         public function getCategories() {
2213                 return $this->mPage->getCategories();
2214         }
2215
2216         /**
2217          * Call to WikiPage function for backwards compatibility.
2218          * @see WikiPage::getComment
2219          */
2220         public function getComment( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2221                 return $this->mPage->getComment( $audience, $user );
2222         }
2223
2224         /**
2225          * Call to WikiPage function for backwards compatibility.
2226          * @see WikiPage::getContentHandler
2227          */
2228         public function getContentHandler() {
2229                 return $this->mPage->getContentHandler();
2230         }
2231
2232         /**
2233          * Call to WikiPage function for backwards compatibility.
2234          * @see WikiPage::getContentModel
2235          */
2236         public function getContentModel() {
2237                 return $this->mPage->getContentModel();
2238         }
2239
2240         /**
2241          * Call to WikiPage function for backwards compatibility.
2242          * @see WikiPage::getContributors
2243          */
2244         public function getContributors() {
2245                 return $this->mPage->getContributors();
2246         }
2247
2248         /**
2249          * Call to WikiPage function for backwards compatibility.
2250          * @see WikiPage::getCreator
2251          */
2252         public function getCreator( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2253                 return $this->mPage->getCreator( $audience, $user );
2254         }
2255
2256         /**
2257          * Call to WikiPage function for backwards compatibility.
2258          * @see WikiPage::getDeletionUpdates
2259          */
2260         public function getDeletionUpdates( Content $content = null ) {
2261                 return $this->mPage->getDeletionUpdates( $content );
2262         }
2263
2264         /**
2265          * Call to WikiPage function for backwards compatibility.
2266          * @see WikiPage::getHiddenCategories
2267          */
2268         public function getHiddenCategories() {
2269                 return $this->mPage->getHiddenCategories();
2270         }
2271
2272         /**
2273          * Call to WikiPage function for backwards compatibility.
2274          * @see WikiPage::getId
2275          */
2276         public function getId() {
2277                 return $this->mPage->getId();
2278         }
2279
2280         /**
2281          * Call to WikiPage function for backwards compatibility.
2282          * @see WikiPage::getLatest
2283          */
2284         public function getLatest() {
2285                 return $this->mPage->getLatest();
2286         }
2287
2288         /**
2289          * Call to WikiPage function for backwards compatibility.
2290          * @see WikiPage::getLinksTimestamp
2291          */
2292         public function getLinksTimestamp() {
2293                 return $this->mPage->getLinksTimestamp();
2294         }
2295
2296         /**
2297          * Call to WikiPage function for backwards compatibility.
2298          * @see WikiPage::getMinorEdit
2299          */
2300         public function getMinorEdit() {
2301                 return $this->mPage->getMinorEdit();
2302         }
2303
2304         /**
2305          * Call to WikiPage function for backwards compatibility.
2306          * @see WikiPage::getOldestRevision
2307          */
2308         public function getOldestRevision() {
2309                 return $this->mPage->getOldestRevision();
2310         }
2311
2312         /**
2313          * Call to WikiPage function for backwards compatibility.
2314          * @see WikiPage::getRedirectTarget
2315          */
2316         public function getRedirectTarget() {
2317                 return $this->mPage->getRedirectTarget();
2318         }
2319
2320         /**
2321          * Call to WikiPage function for backwards compatibility.
2322          * @see WikiPage::getRedirectURL
2323          */
2324         public function getRedirectURL( $rt ) {
2325                 return $this->mPage->getRedirectURL( $rt );
2326         }
2327
2328         /**
2329          * Call to WikiPage function for backwards compatibility.
2330          * @see WikiPage::getRevision
2331          */
2332         public function getRevision() {
2333                 return $this->mPage->getRevision();
2334         }
2335
2336         /**
2337          * Call to WikiPage function for backwards compatibility.
2338          * @see WikiPage::getText
2339          * @deprecated since 1.21 use WikiPage::getContent() instead
2340          */
2341         public function getText( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2342                 wfDeprecated( __METHOD__, '1.21' );
2343                 return $this->mPage->getText( $audience, $user );
2344         }
2345
2346         /**
2347          * Call to WikiPage function for backwards compatibility.
2348          * @see WikiPage::getTimestamp
2349          */
2350         public function getTimestamp() {
2351                 return $this->mPage->getTimestamp();
2352         }
2353
2354         /**
2355          * Call to WikiPage function for backwards compatibility.
2356          * @see WikiPage::getTouched
2357          */
2358         public function getTouched() {
2359                 return $this->mPage->getTouched();
2360         }
2361
2362         /**
2363          * Call to WikiPage function for backwards compatibility.
2364          * @see WikiPage::getUndoContent
2365          */
2366         public function getUndoContent( Revision $undo, Revision $undoafter = null ) {
2367                 return $this->mPage->getUndoContent( $undo, $undoafter );
2368         }
2369
2370         /**
2371          * Call to WikiPage function for backwards compatibility.
2372          * @see WikiPage::getUser
2373          */
2374         public function getUser( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2375                 return $this->mPage->getUser( $audience, $user );
2376         }
2377
2378         /**
2379          * Call to WikiPage function for backwards compatibility.
2380          * @see WikiPage::getUserText
2381          */
2382         public function getUserText( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2383                 return $this->mPage->getUserText( $audience, $user );
2384         }
2385
2386         /**
2387          * Call to WikiPage function for backwards compatibility.
2388          * @see WikiPage::hasViewableContent
2389          */
2390         public function hasViewableContent() {
2391                 return $this->mPage->hasViewableContent();
2392         }
2393
2394         /**
2395          * Call to WikiPage function for backwards compatibility.
2396          * @see WikiPage::insertOn
2397          */
2398         public function insertOn( $dbw, $pageId = null ) {
2399                 return $this->mPage->insertOn( $dbw, $pageId );
2400         }
2401
2402         /**
2403          * Call to WikiPage function for backwards compatibility.
2404          * @see WikiPage::insertProtectNullRevision
2405          */
2406         public function insertProtectNullRevision( $revCommentMsg, array $limit,
2407                 array $expiry, $cascade, $reason, $user = null
2408         ) {
2409                 return $this->mPage->insertProtectNullRevision( $revCommentMsg, $limit,
2410                         $expiry, $cascade, $reason, $user
2411                 );
2412         }
2413
2414         /**
2415          * Call to WikiPage function for backwards compatibility.
2416          * @see WikiPage::insertRedirect
2417          */
2418         public function insertRedirect() {
2419                 return $this->mPage->insertRedirect();
2420         }
2421
2422         /**
2423          * Call to WikiPage function for backwards compatibility.
2424          * @see WikiPage::insertRedirectEntry
2425          */
2426         public function insertRedirectEntry( Title $rt, $oldLatest = null ) {
2427                 return $this->mPage->insertRedirectEntry( $rt, $oldLatest );
2428         }
2429
2430         /**
2431          * Call to WikiPage function for backwards compatibility.
2432          * @see WikiPage::isCountable
2433          */
2434         public function isCountable( $editInfo = false ) {
2435                 return $this->mPage->isCountable( $editInfo );
2436         }
2437
2438         /**
2439          * Call to WikiPage function for backwards compatibility.
2440          * @see WikiPage::isRedirect
2441          */
2442         public function isRedirect() {
2443                 return $this->mPage->isRedirect();
2444         }
2445
2446         /**
2447          * Call to WikiPage function for backwards compatibility.
2448          * @see WikiPage::loadFromRow
2449          */
2450         public function loadFromRow( $data, $from ) {
2451                 return $this->mPage->loadFromRow( $data, $from );
2452         }
2453
2454         /**
2455          * Call to WikiPage function for backwards compatibility.
2456          * @see WikiPage::loadPageData
2457          */
2458         public function loadPageData( $from = 'fromdb' ) {
2459                 $this->mPage->loadPageData( $from );
2460         }
2461
2462         /**
2463          * Call to WikiPage function for backwards compatibility.
2464          * @see WikiPage::lockAndGetLatest
2465          */
2466         public function lockAndGetLatest() {
2467                 return $this->mPage->lockAndGetLatest();
2468         }
2469
2470         /**
2471          * Call to WikiPage function for backwards compatibility.
2472          * @see WikiPage::makeParserOptions
2473          */
2474         public function makeParserOptions( $context ) {
2475                 return $this->mPage->makeParserOptions( $context );
2476         }
2477
2478         /**
2479          * Call to WikiPage function for backwards compatibility.
2480          * @see WikiPage::pageDataFromId
2481          */
2482         public function pageDataFromId( $dbr, $id, $options = [] ) {
2483                 return $this->mPage->pageDataFromId( $dbr, $id, $options );
2484         }
2485
2486         /**
2487          * Call to WikiPage function for backwards compatibility.
2488          * @see WikiPage::pageDataFromTitle
2489          */
2490         public function pageDataFromTitle( $dbr, $title, $options = [] ) {
2491                 return $this->mPage->pageDataFromTitle( $dbr, $title, $options );
2492         }
2493
2494         /**
2495          * Call to WikiPage function for backwards compatibility.
2496          * @see WikiPage::prepareContentForEdit
2497          */
2498         public function prepareContentForEdit(
2499                 Content $content, $revision = null, User $user = null,
2500                 $serialFormat = null, $useCache = true
2501         ) {
2502                 return $this->mPage->prepareContentForEdit(
2503                         $content, $revision, $user,
2504                         $serialFormat, $useCache
2505                 );
2506         }
2507
2508         /**
2509          * Call to WikiPage function for backwards compatibility.
2510          * @deprecated since 1.21, use prepareContentForEdit
2511          * @see WikiPage::prepareTextForEdit
2512          */
2513         public function prepareTextForEdit( $text, $revid = null, User $user = null ) {
2514                 return $this->mPage->prepareTextForEdit( $text, $revid, $user );
2515         }
2516
2517         /**
2518          * Call to WikiPage function for backwards compatibility.
2519          * @see WikiPage::protectDescription
2520          */
2521         public function protectDescription( array $limit, array $expiry ) {
2522                 return $this->mPage->protectDescription( $limit, $expiry );
2523         }
2524
2525         /**
2526          * Call to WikiPage function for backwards compatibility.
2527          * @see WikiPage::protectDescriptionLog
2528          */
2529         public function protectDescriptionLog( array $limit, array $expiry ) {
2530                 return $this->mPage->protectDescriptionLog( $limit, $expiry );
2531         }
2532
2533         /**
2534          * Call to WikiPage function for backwards compatibility.
2535          * @see WikiPage::replaceSectionAtRev
2536          */
2537         public function replaceSectionAtRev( $sectionId, Content $sectionContent,
2538                 $sectionTitle = '', $baseRevId = null
2539         ) {
2540                 return $this->mPage->replaceSectionAtRev( $sectionId, $sectionContent,
2541                         $sectionTitle, $baseRevId
2542                 );
2543         }
2544
2545         /**
2546          * Call to WikiPage function for backwards compatibility.
2547          * @see WikiPage::replaceSectionContent
2548          */
2549         public function replaceSectionContent(
2550                 $sectionId, Content $sectionContent, $sectionTitle = '', $edittime = null
2551         ) {
2552                 return $this->mPage->replaceSectionContent(
2553                         $sectionId, $sectionContent, $sectionTitle, $edittime
2554                 );
2555         }
2556
2557         /**
2558          * Call to WikiPage function for backwards compatibility.
2559          * @see WikiPage::setTimestamp
2560          */
2561         public function setTimestamp( $ts ) {
2562                 return $this->mPage->setTimestamp( $ts );
2563         }
2564
2565         /**
2566          * Call to WikiPage function for backwards compatibility.
2567          * @see WikiPage::shouldCheckParserCache
2568          */
2569         public function shouldCheckParserCache( ParserOptions $parserOptions, $oldId ) {
2570                 return $this->mPage->shouldCheckParserCache( $parserOptions, $oldId );
2571         }
2572
2573         /**
2574          * Call to WikiPage function for backwards compatibility.
2575          * @see WikiPage::supportsSections
2576          */
2577         public function supportsSections() {
2578                 return $this->mPage->supportsSections();
2579         }
2580
2581         /**
2582          * Call to WikiPage function for backwards compatibility.
2583          * @see WikiPage::triggerOpportunisticLinksUpdate
2584          */
2585         public function triggerOpportunisticLinksUpdate( ParserOutput $parserOutput ) {
2586                 return $this->mPage->triggerOpportunisticLinksUpdate( $parserOutput );
2587         }
2588
2589         /**
2590          * Call to WikiPage function for backwards compatibility.
2591          * @see WikiPage::updateCategoryCounts
2592          */
2593         public function updateCategoryCounts( array $added, array $deleted, $id = 0 ) {
2594                 return $this->mPage->updateCategoryCounts( $added, $deleted, $id );
2595         }
2596
2597         /**
2598          * Call to WikiPage function for backwards compatibility.
2599          * @see WikiPage::updateIfNewerOn
2600          */
2601         public function updateIfNewerOn( $dbw, $revision ) {
2602                 return $this->mPage->updateIfNewerOn( $dbw, $revision );
2603         }
2604
2605         /**
2606          * Call to WikiPage function for backwards compatibility.
2607          * @see WikiPage::updateRedirectOn
2608          */
2609         public function updateRedirectOn( $dbw, $redirectTitle, $lastRevIsRedirect = null ) {
2610                 return $this->mPage->updateRedirectOn( $dbw, $redirectTitle, $lastRevIsRedirect = null );
2611         }
2612
2613         /**
2614          * Call to WikiPage function for backwards compatibility.
2615          * @see WikiPage::updateRevisionOn
2616          */
2617         public function updateRevisionOn( $dbw, $revision, $lastRevision = null,
2618                 $lastRevIsRedirect = null
2619         ) {
2620                 return $this->mPage->updateRevisionOn( $dbw, $revision, $lastRevision,
2621                         $lastRevIsRedirect
2622                 );
2623         }
2624
2625         /**
2626          * @param array $limit
2627          * @param array $expiry
2628          * @param bool $cascade
2629          * @param string $reason
2630          * @param User $user
2631          * @return Status
2632          */
2633         public function doUpdateRestrictions( array $limit, array $expiry, &$cascade,
2634                 $reason, User $user
2635         ) {
2636                 return $this->mPage->doUpdateRestrictions( $limit, $expiry, $cascade, $reason, $user );
2637         }
2638
2639         /**
2640          * @param array $limit
2641          * @param string $reason
2642          * @param int $cascade
2643          * @param array $expiry
2644          * @return bool
2645          */
2646         public function updateRestrictions( $limit = [], $reason = '',
2647                 &$cascade = 0, $expiry = []
2648         ) {
2649                 return $this->mPage->doUpdateRestrictions(
2650                         $limit,
2651                         $expiry,
2652                         $cascade,
2653                         $reason,
2654                         $this->getContext()->getUser()
2655                 );
2656         }
2657
2658         /**
2659          * @param string $reason
2660          * @param bool $suppress
2661          * @param int $u1 Unused
2662          * @param bool $u2 Unused
2663          * @param string $error
2664          * @return bool
2665          */
2666         public function doDeleteArticle(
2667                 $reason, $suppress = false, $u1 = null, $u2 = null, &$error = ''
2668         ) {
2669                 return $this->mPage->doDeleteArticle( $reason, $suppress, $u1, $u2, $error );
2670         }
2671
2672         /**
2673          * @param string $fromP
2674          * @param string $summary
2675          * @param string $token
2676          * @param bool $bot
2677          * @param array $resultDetails
2678          * @param User|null $user
2679          * @return array
2680          */
2681         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails, User $user = null ) {
2682                 $user = is_null( $user ) ? $this->getContext()->getUser() : $user;
2683                 return $this->mPage->doRollback( $fromP, $summary, $token, $bot, $resultDetails, $user );
2684         }
2685
2686         /**
2687          * @param string $fromP
2688          * @param string $summary
2689          * @param bool $bot
2690          * @param array $resultDetails
2691          * @param User|null $guser
2692          * @return array
2693          */
2694         public function commitRollback( $fromP, $summary, $bot, &$resultDetails, User $guser = null ) {
2695                 $guser = is_null( $guser ) ? $this->getContext()->getUser() : $guser;
2696                 return $this->mPage->commitRollback( $fromP, $summary, $bot, $resultDetails, $guser );
2697         }
2698
2699         /**
2700          * @param bool $hasHistory
2701          * @return mixed
2702          */
2703         public function generateReason( &$hasHistory ) {
2704                 $title = $this->mPage->getTitle();
2705                 $handler = ContentHandler::getForTitle( $title );
2706                 return $handler->getAutoDeleteReason( $title, $hasHistory );
2707         }
2708
2709         /**
2710          * @return array
2711          *
2712          * @deprecated since 1.24, use WikiPage::selectFields() instead
2713          */
2714         public static function selectFields() {
2715                 wfDeprecated( __METHOD__, '1.24' );
2716                 return WikiPage::selectFields();
2717         }
2718
2719         /**
2720          * @param Title $title
2721          *
2722          * @deprecated since 1.24, use WikiPage::onArticleCreate() instead
2723          */
2724         public static function onArticleCreate( $title ) {
2725                 wfDeprecated( __METHOD__, '1.24' );
2726                 WikiPage::onArticleCreate( $title );
2727         }
2728
2729         /**
2730          * @param Title $title
2731          *
2732          * @deprecated since 1.24, use WikiPage::onArticleDelete() instead
2733          */
2734         public static function onArticleDelete( $title ) {
2735                 wfDeprecated( __METHOD__, '1.24' );
2736                 WikiPage::onArticleDelete( $title );
2737         }
2738
2739         /**
2740          * @param Title $title
2741          *
2742          * @deprecated since 1.24, use WikiPage::onArticleEdit() instead
2743          */
2744         public static function onArticleEdit( $title ) {
2745                 wfDeprecated( __METHOD__, '1.24' );
2746                 WikiPage::onArticleEdit( $title );
2747         }
2748
2749         /**
2750          * @param string $oldtext
2751          * @param string $newtext
2752          * @param int $flags
2753          * @return string
2754          * @deprecated since 1.21, use ContentHandler::getAutosummary() instead
2755          */
2756         public static function getAutosummary( $oldtext, $newtext, $flags ) {
2757                 return WikiPage::getAutosummary( $oldtext, $newtext, $flags );
2758         }
2759         // ******
2760 }