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