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