includes/page/Article.php

   1 <?php
   2 /**
   3  * User interface for page actions.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * Class for viewing MediaWiki article and history.
  25  *
  26  * This maintains WikiPage functions for backwards compatibility.
  27  *
  28  * @todo Move and rewrite code to an Action class
  29  *
  30  * See design.txt for an overview.
  31  * Note: edit user interface and cache support functions have been
  32  * moved to separate EditPage and HTMLFileCache classes.
  33  */
  34 class Article implements Page {
  35         /** @var IContextSource The context this Article is executed in */
  36         protected $mContext;
  37
  38         /** @var WikiPage The WikiPage object of this instance */
  39         protected $mPage;
  40
  41         /** @var ParserOptions ParserOptions object for $wgUser articles */
  42         public $mParserOptions;
  43
  44         /**
  45          * @var string Text of the revision we are working on
  46          * @todo BC cruft
  47          */
  48         public $mContent;
  49
  50         /**
  51          * @var Content Content of the revision we are working on
  52          * @since 1.21
  53          */
  54         public $mContentObject;
  55
  56         /** @var bool Is the content ($mContent) already loaded? */
  57         public $mContentLoaded = false;
  58
  59         /** @var int|null The oldid of the article that is to be shown, 0 for the current revision */
  60         public $mOldId;
  61
  62         /** @var Title Title from which we were redirected here */
  63         public $mRedirectedFrom = null;
  64
  65         /** @var string|bool URL to redirect to or false if none */
  66         public $mRedirectUrl = false;
  67
  68         /** @var int Revision ID of revision we are working on */
  69         public $mRevIdFetched = 0;
  70
  71         /** @var Revision Revision we are working on */
  72         public $mRevision = null;
  73
  74         /** @var ParserOutput */
  75         public $mParserOutput;
  76
  77         /**
  78          * Constructor and clear the article
  79          * @param Title $title Reference to a Title object.
  80          * @param int $oldId Revision ID, null to fetch from request, zero for current
  81          */
  82         public function __construct( Title $title, $oldId = null ) {
  83                 $this->mOldId = $oldId;
  84                 $this->mPage = $this->newPage( $title );
  85         }
  86
  87         /**
  88          * @param Title $title
  89          * @return WikiPage
  90          */
  91         protected function newPage( Title $title ) {
  92                 return new WikiPage( $title );
  93         }
  94
  95         /**
  96          * Constructor from a page id
  97          * @param int $id Article ID to load
  98          * @return Article|null
  99          */
 100         public static function newFromID( $id ) {
 101                 $t = Title::newFromID( $id );
 102                 return $t == null ? null : new static( $t );
 103         }
 104
 105         /**
 106          * Create an Article object of the appropriate class for the given page.
 107          *
 108          * @param Title $title
 109          * @param IContextSource $context
 110          * @return Article
 111          */
 112         public static function newFromTitle( $title, IContextSource $context ) {
 113                 if ( NS_MEDIA == $title->getNamespace() ) {
 114                         // FIXME: where should this go?
 115                         $title = Title::makeTitle( NS_FILE, $title->getDBkey() );
 116                 }
 117
 118                 $page = null;
 119                 Hooks::run( 'ArticleFromTitle', [ &$title, &$page, $context ] );
 120                 if ( !$page ) {
 121                         switch ( $title->getNamespace() ) {
 122                                 case NS_FILE:
 123                                         $page = new ImagePage( $title );
 124                                         break;
 125                                 case NS_CATEGORY:
 126                                         $page = new CategoryPage( $title );
 127                                         break;
 128                                 default:
 129                                         $page = new Article( $title );
 130                         }
 131                 }
 132                 $page->setContext( $context );
 133
 134                 return $page;
 135         }
 136
 137         /**
 138          * Create an Article object of the appropriate class for the given page.
 139          *
 140          * @param WikiPage $page
 141          * @param IContextSource $context
 142          * @return Article
 143          */
 144         public static function newFromWikiPage( WikiPage $page, IContextSource $context ) {
 145                 $article = self::newFromTitle( $page->getTitle(), $context );
 146                 $article->mPage = $page; // override to keep process cached vars
 147                 return $article;
 148         }
 149
 150         /**
 151          * Get the page this view was redirected from
 152          * @return Title|null
 153          * @since 1.28
 154          */
 155         public function getRedirectedFrom() {
 156                 return $this->mRedirectedFrom;
 157         }
 158
 159         /**
 160          * Tell the page view functions that this view was redirected
 161          * from another page on the wiki.
 162          * @param Title $from
 163          */
 164         public function setRedirectedFrom( Title $from ) {
 165                 $this->mRedirectedFrom = $from;
 166         }
 167
 168         /**
 169          * Get the title object of the article
 170          *
 171          * @return Title Title object of this page
 172          */
 173         public function getTitle() {
 174                 return $this->mPage->getTitle();
 175         }
 176
 177         /**
 178          * Get the WikiPage object of this instance
 179          *
 180          * @since 1.19
 181          * @return WikiPage
 182          */
 183         public function getPage() {
 184                 return $this->mPage;
 185         }
 186
 187         /**
 188          * Clear the object
 189          */
 190         public function clear() {
 191                 $this->mContentLoaded = false;
 192
 193                 $this->mRedirectedFrom = null; # Title object if set
 194                 $this->mRevIdFetched = 0;
 195                 $this->mRedirectUrl = false;
 196
 197                 $this->mPage->clear();
 198         }
 199
 200         /**
 201          * Note that getContent does not follow redirects anymore.
 202          * If you need to fetch redirectable content easily, try
 203          * the shortcut in WikiPage::getRedirectTarget()
 204          *
 205          * This function has side effects! Do not use this function if you
 206          * only want the real revision text if any.
 207          *
 208          * @deprecated since 1.21; use WikiPage::getContent() instead
 209          *
 210          * @return string Return the text of this revision
 211          */
 212         public function getContent() {
 213                 wfDeprecated( __METHOD__, '1.21' );
 214                 $content = $this->getContentObject();
 215                 return ContentHandler::getContentText( $content );
 216         }
 217
 218         /**
 219          * Returns a Content object representing the pages effective display content,
 220          * not necessarily the revision's content!
 221          *
 222          * Note that getContent does not follow redirects anymore.
 223          * If you need to fetch redirectable content easily, try
 224          * the shortcut in WikiPage::getRedirectTarget()
 225          *
 226          * This function has side effects! Do not use this function if you
 227          * only want the real revision text if any.
 228          *
 229          * @return Content Return the content of this revision
 230          *
 231          * @since 1.21
 232          */
 233         protected function getContentObject() {
 234
 235                 if ( $this->mPage->getId() === 0 ) {
 236                         # If this is a MediaWiki:x message, then load the messages
 237                         # and return the message value for x.
 238                         if ( $this->getTitle()->getNamespace() == NS_MEDIAWIKI ) {
 239                                 $text = $this->getTitle()->getDefaultMessageText();
 240                                 if ( $text === false ) {
 241                                         $text = '';
 242                                 }
 243
 244                                 $content = ContentHandler::makeContent( $text, $this->getTitle() );
 245                         } else {
 246                                 $message = $this->getContext()->getUser()->isLoggedIn() ? 'noarticletext' : 'noarticletextanon';
 247                                 $content = new MessageContent( $message, null, 'parsemag' );
 248                         }
 249                 } else {
 250                         $this->fetchContentObject();
 251                         $content = $this->mContentObject;
 252                 }
 253
 254                 return $content;
 255         }
 256
 257         /**
 258          * @return int The oldid of the article that is to be shown, 0 for the current revision
 259          */
 260         public function getOldID() {
 261                 if ( is_null( $this->mOldId ) ) {
 262                         $this->mOldId = $this->getOldIDFromRequest();
 263                 }
 264
 265                 return $this->mOldId;
 266         }
 267
 268         /**
 269          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 270          *
 271          * @return int The old id for the request
 272          */
 273         public function getOldIDFromRequest() {
 274                 $this->mRedirectUrl = false;
 275
 276                 $request = $this->getContext()->getRequest();
 277                 $oldid = $request->getIntOrNull( 'oldid' );
 278
 279                 if ( $oldid === null ) {
 280                         return 0;
 281                 }
 282
 283                 if ( $oldid !== 0 ) {
 284                         # Load the given revision and check whether the page is another one.
 285                         # In that case, update this instance to reflect the change.
 286                         if ( $oldid === $this->mPage->getLatest() ) {
 287                                 $this->mRevision = $this->mPage->getRevision();
 288                         } else {
 289                                 $this->mRevision = Revision::newFromId( $oldid );
 290                                 if ( $this->mRevision !== null ) {
 291                                         // Revision title doesn't match the page title given?
 292                                         if ( $this->mPage->getId() != $this->mRevision->getPage() ) {
 293                                                 $function = [ get_class( $this->mPage ), 'newFromID' ];
 294                                                 $this->mPage = call_user_func( $function, $this->mRevision->getPage() );
 295                                         }
 296                                 }
 297                         }
 298                 }
 299
 300                 if ( $request->getVal( 'direction' ) == 'next' ) {
 301                         $nextid = $this->getTitle()->getNextRevisionID( $oldid );
 302                         if ( $nextid ) {
 303                                 $oldid = $nextid;
 304                                 $this->mRevision = null;
 305                         } else {
 306                                 $this->mRedirectUrl = $this->getTitle()->getFullURL( 'redirect=no' );
 307                         }
 308                 } elseif ( $request->getVal( 'direction' ) == 'prev' ) {
 309                         $previd = $this->getTitle()->getPreviousRevisionID( $oldid );
 310                         if ( $previd ) {
 311                                 $oldid = $previd;
 312                                 $this->mRevision = null;
 313                         }
 314                 }
 315
 316                 return $oldid;
 317         }
 318
 319         /**
 320          * Get text of an article from database
 321          * Does *NOT* follow redirects.
 322          *
 323          * @protected
 324          * @note This is really internal functionality that should really NOT be
 325          * used by other functions. For accessing article content, use the WikiPage
 326          * class, especially WikiBase::getContent(). However, a lot of legacy code
 327          * uses this method to retrieve page text from the database, so the function
 328          * has to remain public for now.
 329          *
 330          * @return string|bool String containing article contents, or false if null
 331          * @deprecated since 1.21, use WikiPage::getContent() instead
 332          */
 333         function fetchContent() {
 334                 // BC cruft!
 335
 336                 wfDeprecated( __METHOD__, '1.21' );
 337
 338                 if ( $this->mContentLoaded && $this->mContent ) {
 339                         return $this->mContent;
 340                 }
 341
 342                 $content = $this->fetchContentObject();
 343
 344                 if ( !$content ) {
 345                         return false;
 346                 }
 347
 348                 // @todo Get rid of mContent everywhere!
 349                 $this->mContent = ContentHandler::getContentText( $content );
 350                 ContentHandler::runLegacyHooks(
 351                         'ArticleAfterFetchContent',
 352                         [ &$this, &$this->mContent ],
 353                         '1.21'
 354                 );
 355
 356                 return $this->mContent;
 357         }
 358
 359         /**
 360          * Get text content object
 361          * Does *NOT* follow redirects.
 362          * @todo When is this null?
 363          *
 364          * @note Code that wants to retrieve page content from the database should
 365          * use WikiPage::getContent().
 366          *
 367          * @return Content|null|bool
 368          *
 369          * @since 1.21
 370          */
 371         protected function fetchContentObject() {
 372                 if ( $this->mContentLoaded ) {
 373                         return $this->mContentObject;
 374                 }
 375
 376                 $this->mContentLoaded = true;
 377                 $this->mContent = null;
 378
 379                 $oldid = $this->getOldID();
 380
 381                 # Pre-fill content with error message so that if something
 382                 # fails we'll have something telling us what we intended.
 383                 // XXX: this isn't page content but a UI message. horrible.
 384                 $this->mContentObject = new MessageContent( 'missing-revision', [ $oldid ] );
 385
 386                 if ( $oldid ) {
 387                         # $this->mRevision might already be fetched by getOldIDFromRequest()
 388                         if ( !$this->mRevision ) {
 389                                 $this->mRevision = Revision::newFromId( $oldid );
 390                                 if ( !$this->mRevision ) {
 391                                         wfDebug( __METHOD__ . " failed to retrieve specified revision, id $oldid\n" );
 392                                         return false;
 393                                 }
 394                         }
 395                 } else {
 396                         $oldid = $this->mPage->getLatest();
 397                         if ( !$oldid ) {
 398                                 wfDebug( __METHOD__ . " failed to find page data for title " .
 399                                         $this->getTitle()->getPrefixedText() . "\n" );
 400                                 return false;
 401                         }
 402
 403                         # Update error message with correct oldid
 404                         $this->mContentObject = new MessageContent( 'missing-revision', [ $oldid ] );
 405
 406                         $this->mRevision = $this->mPage->getRevision();
 407
 408                         if ( !$this->mRevision ) {
 409                                 wfDebug( __METHOD__ . " failed to retrieve current page, rev_id $oldid\n" );
 410                                 return false;
 411                         }
 412                 }
 413
 414                 // @todo FIXME: Horrible, horrible! This content-loading interface just plain sucks.
 415                 // We should instead work with the Revision object when we need it...
 416                 // Loads if user is allowed
 417                 $content = $this->mRevision->getContent(
 418                         Revision::FOR_THIS_USER,
 419                         $this->getContext()->getUser()
 420                 );
 421
 422                 if ( !$content ) {
 423                         wfDebug( __METHOD__ . " failed to retrieve content of revision " .
 424                                 $this->mRevision->getId() . "\n" );
 425                         return false;
 426                 }
 427
 428                 $this->mContentObject = $content;
 429                 $this->mRevIdFetched = $this->mRevision->getId();
 430
 431                 ContentHandler::runLegacyHooks(
 432                         'ArticleAfterFetchContentObject',
 433                         [ &$this, &$this->mContentObject ],
 434                         '1.21'
 435                 );
 436
 437                 return $this->mContentObject;
 438         }
 439
 440         /**
 441          * Returns true if the currently-referenced revision is the current edit
 442          * to this page (and it exists).
 443          * @return bool
 444          */
 445         public function isCurrent() {
 446                 # If no oldid, this is the current version.
 447                 if ( $this->getOldID() == 0 ) {
 448                         return true;
 449                 }
 450
 451                 return $this->mPage->exists() && $this->mRevision && $this->mRevision->isCurrent();
 452         }
 453
 454         /**
 455          * Get the fetched Revision object depending on request parameters or null
 456          * on failure.
 457          *
 458          * @since 1.19
 459          * @return Revision|null
 460          */
 461         public function getRevisionFetched() {
 462                 $this->fetchContentObject();
 463
 464                 return $this->mRevision;
 465         }
 466
 467         /**
 468          * Use this to fetch the rev ID used on page views
 469          *
 470          * @return int Revision ID of last article revision
 471          */
 472         public function getRevIdFetched() {
 473                 if ( $this->mRevIdFetched ) {
 474                         return $this->mRevIdFetched;
 475                 } else {
 476                         return $this->mPage->getLatest();
 477                 }
 478         }
 479
 480         /**
 481          * This is the default action of the index.php entry point: just view the
 482          * page of the given title.
 483          */
 484         public function view() {
 485                 global $wgUseFileCache, $wgDebugToolbar;
 486
 487                 # Get variables from query string
 488                 # As side effect this will load the revision and update the title
 489                 # in a revision ID is passed in the request, so this should remain
 490                 # the first call of this method even if $oldid is used way below.
 491                 $oldid = $this->getOldID();
 492
 493                 $user = $this->getContext()->getUser();
 494                 # Another whitelist check in case getOldID() is altering the title
 495                 $permErrors = $this->getTitle()->getUserPermissionsErrors( 'read', $user );
 496                 if ( count( $permErrors ) ) {
 497                         wfDebug( __METHOD__ . ": denied on secondary read check\n" );
 498                         throw new PermissionsError( 'read', $permErrors );
 499                 }
 500
 501                 $outputPage = $this->getContext()->getOutput();
 502                 # getOldID() may as well want us to redirect somewhere else
 503                 if ( $this->mRedirectUrl ) {
 504                         $outputPage->redirect( $this->mRedirectUrl );
 505                         wfDebug( __METHOD__ . ": redirecting due to oldid\n" );
 506
 507                         return;
 508                 }
 509
 510                 # If we got diff in the query, we want to see a diff page instead of the article.
 511                 if ( $this->getContext()->getRequest()->getCheck( 'diff' ) ) {
 512                         wfDebug( __METHOD__ . ": showing diff page\n" );
 513                         $this->showDiffPage();
 514
 515                         return;
 516                 }
 517
 518                 # Set page title (may be overridden by DISPLAYTITLE)
 519                 $outputPage->setPageTitle( $this->getTitle()->getPrefixedText() );
 520
 521                 $outputPage->setArticleFlag( true );
 522                 # Allow frames by default
 523                 $outputPage->allowClickjacking();
 524
 525                 $parserCache = ParserCache::singleton();
 526
 527                 $parserOptions = $this->getParserOptions();
 528                 # Render printable version, use printable version cache
 529                 if ( $outputPage->isPrintable() ) {
 530                         $parserOptions->setIsPrintable( true );
 531                         $parserOptions->setEditSection( false );
 532                 } elseif ( !$this->isCurrent() || !$this->getTitle()->quickUserCan( 'edit', $user ) ) {
 533                         $parserOptions->setEditSection( false );
 534                 }
 535
 536                 # Try client and file cache
 537                 if ( !$wgDebugToolbar && $oldid === 0 && $this->mPage->checkTouched() ) {
 538                         # Try to stream the output from file cache
 539                         if ( $wgUseFileCache && $this->tryFileCache() ) {
 540                                 wfDebug( __METHOD__ . ": done file cache\n" );
 541                                 # tell wgOut that output is taken care of
 542                                 $outputPage->disable();
 543                                 $this->mPage->doViewUpdates( $user, $oldid );
 544
 545                                 return;
 546                         }
 547                 }
 548
 549                 # Should the parser cache be used?
 550                 $useParserCache = $this->mPage->shouldCheckParserCache( $parserOptions, $oldid );
 551                 wfDebug( 'Article::view using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
 552                 if ( $user->getStubThreshold() ) {
 553                         $this->getContext()->getStats()->increment( 'pcache_miss_stub' );
 554                 }
 555
 556                 $this->showRedirectedFromHeader();
 557                 $this->showNamespaceHeader();
 558
 559                 # Iterate through the possible ways of constructing the output text.
 560                 # Keep going until $outputDone is set, or we run out of things to do.
 561                 $pass = 0;
 562                 $outputDone = false;
 563                 $this->mParserOutput = false;
 564
 565                 while ( !$outputDone && ++$pass ) {
 566                         switch ( $pass ) {
 567                                 case 1:
 568                                         Hooks::run( 'ArticleViewHeader', [ &$this, &$outputDone, &$useParserCache ] );
 569                                         break;
 570                                 case 2:
 571                                         # Early abort if the page doesn't exist
 572                                         if ( !$this->mPage->exists() ) {
 573                                                 wfDebug( __METHOD__ . ": showing missing article\n" );
 574                                                 $this->showMissingArticle();
 575                                                 $this->mPage->doViewUpdates( $user );
 576                                                 return;
 577                                         }
 578
 579                                         # Try the parser cache
 580                                         if ( $useParserCache ) {
 581                                                 $this->mParserOutput = $parserCache->get( $this->mPage, $parserOptions );
 582
 583                                                 if ( $this->mParserOutput !== false ) {
 584                                                         if ( $oldid ) {
 585                                                                 wfDebug( __METHOD__ . ": showing parser cache contents for current rev permalink\n" );
 586                                                                 $this->setOldSubtitle( $oldid );
 587                                                         } else {
 588                                                                 wfDebug( __METHOD__ . ": showing parser cache contents\n" );
 589                                                         }
 590                                                         $outputPage->addParserOutput( $this->mParserOutput );
 591                                                         # Ensure that UI elements requiring revision ID have
 592                                                         # the correct version information.
 593                                                         $outputPage->setRevisionId( $this->mPage->getLatest() );
 594                                                         # Preload timestamp to avoid a DB hit
 595                                                         $cachedTimestamp = $this->mParserOutput->getTimestamp();
 596                                                         if ( $cachedTimestamp !== null ) {
 597                                                                 $outputPage->setRevisionTimestamp( $cachedTimestamp );
 598                                                                 $this->mPage->setTimestamp( $cachedTimestamp );
 599                                                         }
 600                                                         $outputDone = true;
 601                                                 }
 602                                         }
 603                                         break;
 604                                 case 3:
 605                                         # This will set $this->mRevision if needed
 606                                         $this->fetchContentObject();
 607
 608                                         # Are we looking at an old revision
 609                                         if ( $oldid && $this->mRevision ) {
 610                                                 $this->setOldSubtitle( $oldid );
 611
 612                                                 if ( !$this->showDeletedRevisionHeader() ) {
 613                                                         wfDebug( __METHOD__ . ": cannot view deleted revision\n" );
 614                                                         return;
 615                                                 }
 616                                         }
 617
 618                                         # Ensure that UI elements requiring revision ID have
 619                                         # the correct version information.
 620                                         $outputPage->setRevisionId( $this->getRevIdFetched() );
 621                                         # Preload timestamp to avoid a DB hit
 622                                         $outputPage->setRevisionTimestamp( $this->mPage->getTimestamp() );
 623
 624                                         # Pages containing custom CSS or JavaScript get special treatment
 625                                         if ( $this->getTitle()->isCssOrJsPage() || $this->getTitle()->isCssJsSubpage() ) {
 626                                                 wfDebug( __METHOD__ . ": showing CSS/JS source\n" );
 627                                                 $this->showCssOrJsPage();
 628                                                 $outputDone = true;
 629                                         } elseif ( !Hooks::run( 'ArticleContentViewCustom',
 630                                                         [ $this->fetchContentObject(), $this->getTitle(), $outputPage ] ) ) {
 631
 632                                                 # Allow extensions do their own custom view for certain pages
 633                                                 $outputDone = true;
 634                                         } elseif ( !ContentHandler::runLegacyHooks(
 635                                                 'ArticleViewCustom',
 636                                                 [ $this->fetchContentObject(), $this->getTitle(), $outputPage ],
 637                                                 '1.21'
 638                                         ) ) {
 639                                                 # Allow extensions do their own custom view for certain pages
 640                                                 $outputDone = true;
 641                                         }
 642                                         break;
 643                                 case 4:
 644                                         # Run the parse, protected by a pool counter
 645                                         wfDebug( __METHOD__ . ": doing uncached parse\n" );
 646
 647                                         $content = $this->getContentObject();
 648                                         $poolArticleView = new PoolWorkArticleView( $this->getPage(), $parserOptions,
 649                                                 $this->getRevIdFetched(), $useParserCache, $content );
 650
 651                                         if ( !$poolArticleView->execute() ) {
 652                                                 $error = $poolArticleView->getError();
 653                                                 if ( $error ) {
 654                                                         $outputPage->clearHTML(); // for release() errors
 655                                                         $outputPage->enableClientCache( false );
 656                                                         $outputPage->setRobotPolicy( 'noindex,nofollow' );
 657
 658                                                         $errortext = $error->getWikiText( false, 'view-pool-error' );
 659                                                         $outputPage->addWikiText( '<div class="errorbox">' . $errortext . '</div>' );
 660                                                 }
 661                                                 # Connection or timeout error
 662                                                 return;
 663                                         }
 664
 665                                         $this->mParserOutput = $poolArticleView->getParserOutput();
 666                                         $outputPage->addParserOutput( $this->mParserOutput );
 667                                         if ( $content->getRedirectTarget() ) {
 668                                                 $outputPage->addSubtitle( "<span id=\"redirectsub\">" .
 669                                                         $this->getContext()->msg( 'redirectpagesub' )->parse() . "</span>" );
 670                                         }
 671
 672                                         # Don't cache a dirty ParserOutput object
 673                                         if ( $poolArticleView->getIsDirty() ) {
 674                                                 $outputPage->setCdnMaxage( 0 );
 675                                                 $outputPage->addHTML( "<!-- parser cache is expired, " .
 676                                                         "sending anyway due to pool overload-->\n" );
 677                                         }
 678
 679                                         $outputDone = true;
 680                                         break;
 681                                 # Should be unreachable, but just in case...
 682                                 default:
 683                                         break 2;
 684                         }
 685                 }
 686
 687                 # Get the ParserOutput actually *displayed* here.
 688                 # Note that $this->mParserOutput is the *current*/oldid version output.
 689                 $pOutput = ( $outputDone instanceof ParserOutput )
 690                         ? $outputDone // object fetched by hook
 691                         : $this->mParserOutput;
 692
 693                 # Adjust title for main page & pages with displaytitle
 694                 if ( $pOutput ) {
 695                         $this->adjustDisplayTitle( $pOutput );
 696                 }
 697
 698                 # For the main page, overwrite the <title> element with the con-
 699                 # tents of 'pagetitle-view-mainpage' instead of the default (if
 700                 # that's not empty).
 701                 # This message always exists because it is in the i18n files
 702                 if ( $this->getTitle()->isMainPage() ) {
 703                         $msg = wfMessage( 'pagetitle-view-mainpage' )->inContentLanguage();
 704                         if ( !$msg->isDisabled() ) {
 705                                 $outputPage->setHTMLTitle( $msg->title( $this->getTitle() )->text() );
 706                         }
 707                 }
 708
 709                 # Use adaptive TTLs for CDN so delayed/failed purges are noticed less often.
 710                 # This could use getTouched(), but that could be scary for major template edits.
 711                 $outputPage->adaptCdnTTL( $this->mPage->getTimestamp(), IExpiringStore::TTL_DAY );
 712
 713                 # Check for any __NOINDEX__ tags on the page using $pOutput
 714                 $policy = $this->getRobotPolicy( 'view', $pOutput );
 715                 $outputPage->setIndexPolicy( $policy['index'] );
 716                 $outputPage->setFollowPolicy( $policy['follow'] );
 717
 718                 $this->showViewFooter();
 719                 $this->mPage->doViewUpdates( $user, $oldid );
 720
 721                 $outputPage->addModules( 'mediawiki.action.view.postEdit' );
 722         }
 723
 724         /**
 725          * Adjust title for pages with displaytitle, -{T|}- or language conversion
 726          * @param ParserOutput $pOutput
 727          */
 728         public function adjustDisplayTitle( ParserOutput $pOutput ) {
 729                 # Adjust the title if it was set by displaytitle, -{T|}- or language conversion
 730                 $titleText = $pOutput->getTitleText();
 731                 if ( strval( $titleText ) !== '' ) {
 732                         $this->getContext()->getOutput()->setPageTitle( $titleText );
 733                 }
 734         }
 735
 736         /**
 737          * Show a diff page according to current request variables. For use within
 738          * Article::view() only, other callers should use the DifferenceEngine class.
 739          *
 740          */
 741         protected function showDiffPage() {
 742                 $request = $this->getContext()->getRequest();
 743                 $user = $this->getContext()->getUser();
 744                 $diff = $request->getVal( 'diff' );
 745                 $rcid = $request->getVal( 'rcid' );
 746                 $diffOnly = $request->getBool( 'diffonly', $user->getOption( 'diffonly' ) );
 747                 $purge = $request->getVal( 'action' ) == 'purge';
 748                 $unhide = $request->getInt( 'unhide' ) == 1;
 749                 $oldid = $this->getOldID();
 750
 751                 $rev = $this->getRevisionFetched();
 752
 753                 if ( !$rev ) {
 754                         $this->getContext()->getOutput()->setPageTitle( wfMessage( 'errorpagetitle' ) );
 755                         $msg = $this->getContext()->msg( 'difference-missing-revision' )
 756                                 ->params( $oldid )
 757                                 ->numParams( 1 )
 758                                 ->parseAsBlock();
 759                         $this->getContext()->getOutput()->addHTML( $msg );
 760                         return;
 761                 }
 762
 763                 $contentHandler = $rev->getContentHandler();
 764                 $de = $contentHandler->createDifferenceEngine(
 765                         $this->getContext(),
 766                         $oldid,
 767                         $diff,
 768                         $rcid,
 769                         $purge,
 770                         $unhide
 771                 );
 772
 773                 // DifferenceEngine directly fetched the revision:
 774                 $this->mRevIdFetched = $de->mNewid;
 775                 $de->showDiffPage( $diffOnly );
 776
 777                 // Run view updates for the newer revision being diffed (and shown
 778                 // below the diff if not $diffOnly).
 779                 list( $old, $new ) = $de->mapDiffPrevNext( $oldid, $diff );
 780                 // New can be false, convert it to 0 - this conveniently means the latest revision
 781                 $this->mPage->doViewUpdates( $user, (int)$new );
 782         }
 783
 784         /**
 785          * Show a page view for a page formatted as CSS or JavaScript. To be called by
 786          * Article::view() only.
 787          *
 788          * This exists mostly to serve the deprecated ShowRawCssJs hook (used to customize these views).
 789          * It has been replaced by the ContentGetParserOutput hook, which lets you do the same but with
 790          * more flexibility.
 791          *
 792          * @param bool $showCacheHint Whether to show a message telling the user
 793          *   to clear the browser cache (default: true).
 794          */
 795         protected function showCssOrJsPage( $showCacheHint = true ) {
 796                 $outputPage = $this->getContext()->getOutput();
 797
 798                 if ( $showCacheHint ) {
 799                         $dir = $this->getContext()->getLanguage()->getDir();
 800                         $lang = $this->getContext()->getLanguage()->getHtmlCode();
 801
 802                         $outputPage->wrapWikiMsg(
 803                                 "<div id='mw-clearyourcache' lang='$lang' dir='$dir' class='mw-content-$dir'>\n$1\n</div>",
 804                                 'clearyourcache'
 805                         );
 806                 }
 807
 808                 $this->fetchContentObject();
 809
 810                 if ( $this->mContentObject ) {
 811                         // Give hooks a chance to customise the output
 812                         if ( ContentHandler::runLegacyHooks(
 813                                 'ShowRawCssJs',
 814                                 [ $this->mContentObject, $this->getTitle(), $outputPage ],
 815                                 '1.24'
 816                         ) ) {
 817                                 // If no legacy hooks ran, display the content of the parser output, including RL modules,
 818                                 // but excluding metadata like categories and language links
 819                                 $po = $this->mContentObject->getParserOutput( $this->getTitle() );
 820                                 $outputPage->addParserOutputContent( $po );
 821                         }
 822                 }
 823         }
 824
 825         /**
 826          * Get the robot policy to be used for the current view
 827          * @param string $action The action= GET parameter
 828          * @param ParserOutput|null $pOutput
 829          * @return array The policy that should be set
 830          * @todo actions other than 'view'
 831          */
 832         public function getRobotPolicy( $action, $pOutput = null ) {
 833                 global $wgArticleRobotPolicies, $wgNamespaceRobotPolicies, $wgDefaultRobotPolicy;
 834
 835                 $ns = $this->getTitle()->getNamespace();
 836
 837                 # Don't index user and user talk pages for blocked users (bug 11443)
 838                 if ( ( $ns == NS_USER || $ns == NS_USER_TALK ) && !$this->getTitle()->isSubpage() ) {
 839                         $specificTarget = null;
 840                         $vagueTarget = null;
 841                         $titleText = $this->getTitle()->getText();
 842                         if ( IP::isValid( $titleText ) ) {
 843                                 $vagueTarget = $titleText;
 844                         } else {
 845                                 $specificTarget = $titleText;
 846                         }
 847                         if ( Block::newFromTarget( $specificTarget, $vagueTarget ) instanceof Block ) {
 848                                 return [
 849                                         'index' => 'noindex',
 850                                         'follow' => 'nofollow'
 851                                 ];
 852                         }
 853                 }
 854
 855                 if ( $this->mPage->getId() === 0 || $this->getOldID() ) {
 856                         # Non-articles (special pages etc), and old revisions
 857                         return [
 858                                 'index' => 'noindex',
 859                                 'follow' => 'nofollow'
 860                         ];
 861                 } elseif ( $this->getContext()->getOutput()->isPrintable() ) {
 862                         # Discourage indexing of printable versions, but encourage following
 863                         return [
 864                                 'index' => 'noindex',
 865                                 'follow' => 'follow'
 866                         ];
 867                 } elseif ( $this->getContext()->getRequest()->getInt( 'curid' ) ) {
 868                         # For ?curid=x urls, disallow indexing
 869                         return [
 870                                 'index' => 'noindex',
 871                                 'follow' => 'follow'
 872                         ];
 873                 }
 874
 875                 # Otherwise, construct the policy based on the various config variables.
 876                 $policy = self::formatRobotPolicy( $wgDefaultRobotPolicy );
 877
 878                 if ( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 879                         # Honour customised robot policies for this namespace
 880                         $policy = array_merge(
 881                                 $policy,
 882                                 self::formatRobotPolicy( $wgNamespaceRobotPolicies[$ns] )
 883                         );
 884                 }
 885                 if ( $this->getTitle()->canUseNoindex() && is_object( $pOutput ) && $pOutput->getIndexPolicy() ) {
 886                         # __INDEX__ and __NOINDEX__ magic words, if allowed. Incorporates
 887                         # a final sanity check that we have really got the parser output.
 888                         $policy = array_merge(
 889                                 $policy,
 890                                 [ 'index' => $pOutput->getIndexPolicy() ]
 891                         );
 892                 }
 893
 894                 if ( isset( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] ) ) {
 895                         # (bug 14900) site config can override user-defined __INDEX__ or __NOINDEX__
 896                         $policy = array_merge(
 897                                 $policy,
 898                                 self::formatRobotPolicy( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] )
 899                         );
 900                 }
 901
 902                 return $policy;
 903         }
 904
 905         /**
 906          * Converts a String robot policy into an associative array, to allow
 907          * merging of several policies using array_merge().
 908          * @param array|string $policy Returns empty array on null/false/'', transparent
 909          *   to already-converted arrays, converts string.
 910          * @return array 'index' => \<indexpolicy\>, 'follow' => \<followpolicy\>
 911          */
 912         public static function formatRobotPolicy( $policy ) {
 913                 if ( is_array( $policy ) ) {
 914                         return $policy;
 915                 } elseif ( !$policy ) {
 916                         return [];
 917                 }
 918
 919                 $policy = explode( ',', $policy );
 920                 $policy = array_map( 'trim', $policy );
 921
 922                 $arr = [];
 923                 foreach ( $policy as $var ) {
 924                         if ( in_array( $var, [ 'index', 'noindex' ] ) ) {
 925                                 $arr['index'] = $var;
 926                         } elseif ( in_array( $var, [ 'follow', 'nofollow' ] ) ) {
 927                                 $arr['follow'] = $var;
 928                         }
 929                 }
 930
 931                 return $arr;
 932         }
 933
 934         /**
 935          * If this request is a redirect view, send "redirected from" subtitle to
 936          * the output. Returns true if the header was needed, false if this is not
 937          * a redirect view. Handles both local and remote redirects.
 938          *
 939          * @return bool
 940          */
 941         public function showRedirectedFromHeader() {
 942                 global $wgRedirectSources;
 943
 944                 $context = $this->getContext();
 945                 $outputPage = $context->getOutput();
 946                 $request = $context->getRequest();
 947                 $rdfrom = $request->getVal( 'rdfrom' );
 948
 949                 // Construct a URL for the current page view, but with the target title
 950                 $query = $request->getValues();
 951                 unset( $query['rdfrom'] );
 952                 unset( $query['title'] );
 953                 if ( $this->getTitle()->isRedirect() ) {
 954                         // Prevent double redirects
 955                         $query['redirect'] = 'no';
 956                 }
 957                 $redirectTargetUrl = $this->getTitle()->getLinkURL( $query );
 958
 959                 if ( isset( $this->mRedirectedFrom ) ) {
 960                         // This is an internally redirected page view.
 961                         // We'll need a backlink to the source page for navigation.
 962                         if ( Hooks::run( 'ArticleViewRedirect', [ &$this ] ) ) {
 963                                 $redir = Linker::linkKnown(
 964                                         $this->mRedirectedFrom,
 965                                         null,
 966                                         [],
 967                                         [ 'redirect' => 'no' ]
 968                                 );
 969
 970                                 $outputPage->addSubtitle( "<span class=\"mw-redirectedfrom\">" .
 971                                         $context->msg( 'redirectedfrom' )->rawParams( $redir )->parse()
 972                                 . "</span>" );
 973
 974                                 // Add the script to update the displayed URL and
 975                                 // set the fragment if one was specified in the redirect
 976                                 $outputPage->addJsConfigVars( [
 977                                         'wgInternalRedirectTargetUrl' => $redirectTargetUrl,
 978                                 ] );
 979                                 $outputPage->addModules( 'mediawiki.action.view.redirect' );
 980
 981                                 // Add a <link rel="canonical"> tag
 982                                 $outputPage->setCanonicalUrl( $this->getTitle()->getCanonicalURL() );
 983
 984                                 // Tell the output object that the user arrived at this article through a redirect
 985                                 $outputPage->setRedirectedFrom( $this->mRedirectedFrom );
 986
 987                                 return true;
 988                         }
 989                 } elseif ( $rdfrom ) {
 990                         // This is an externally redirected view, from some other wiki.
 991                         // If it was reported from a trusted site, supply a backlink.
 992                         if ( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 993                                 $redir = Linker::makeExternalLink( $rdfrom, $rdfrom );
 994                                 $outputPage->addSubtitle( "<span class=\"mw-redirectedfrom\">" .
 995                                         $context->msg( 'redirectedfrom' )->rawParams( $redir )->parse()
 996                                 . "</span>" );
 997
 998                                 // Add the script to update the displayed URL
 999                                 $outputPage->addJsConfigVars( [
1000                                         'wgInternalRedirectTargetUrl' => $redirectTargetUrl,
1001                                 ] );
1002                                 $outputPage->addModules( 'mediawiki.action.view.redirect' );
1003
1004                                 return true;
1005                         }
1006                 }
1007
1008                 return false;
1009         }
1010
1011         /**
1012          * Show a header specific to the namespace currently being viewed, like
1013          * [[MediaWiki:Talkpagetext]]. For Article::view().
1014          */
1015         public function showNamespaceHeader() {
1016                 if ( $this->getTitle()->isTalkPage() ) {
1017                         if ( !wfMessage( 'talkpageheader' )->isDisabled() ) {
1018                                 $this->getContext()->getOutput()->wrapWikiMsg(
1019                                         "<div class=\"mw-talkpageheader\">\n$1\n</div>",
1020                                         [ 'talkpageheader' ]
1021                                 );
1022                         }
1023                 }
1024         }
1025
1026         /**
1027          * Show the footer section of an ordinary page view
1028          */
1029         public function showViewFooter() {
1030                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
1031                 if ( $this->getTitle()->getNamespace() == NS_USER_TALK
1032                         && IP::isValid( $this->getTitle()->getText() )
1033                 ) {
1034                         $this->getContext()->getOutput()->addWikiMsg( 'anontalkpagetext' );
1035                 }
1036
1037                 // Show a footer allowing the user to patrol the shown revision or page if possible
1038                 $patrolFooterShown = $this->showPatrolFooter();
1039
1040                 Hooks::run( 'ArticleViewFooter', [ $this, $patrolFooterShown ] );
1041         }
1042
1043         /**
1044          * If patrol is possible, output a patrol UI box. This is called from the
1045          * footer section of ordinary page views. If patrol is not possible or not
1046          * desired, does nothing.
1047          * Side effect: When the patrol link is build, this method will call
1048          * OutputPage::preventClickjacking() and load mediawiki.page.patrol.ajax.
1049          *
1050          * @return bool
1051          */
1052         public function showPatrolFooter() {
1053                 global $wgUseNPPatrol, $wgUseRCPatrol, $wgUseFilePatrol, $wgEnableAPI, $wgEnableWriteAPI;
1054
1055                 $outputPage = $this->getContext()->getOutput();
1056                 $user = $this->getContext()->getUser();
1057                 $title = $this->getTitle();
1058                 $rc = false;
1059
1060                 if ( !$title->quickUserCan( 'patrol', $user )
1061                         || !( $wgUseRCPatrol || $wgUseNPPatrol
1062                                 || ( $wgUseFilePatrol && $title->inNamespace( NS_FILE ) ) )
1063                 ) {
1064                         // Patrolling is disabled or the user isn't allowed to
1065                         return false;
1066                 }
1067
1068                 if ( $this->mRevision
1069                         && !RecentChange::isInRCLifespan( $this->mRevision->getTimestamp(), 21600 )
1070                 ) {
1071                         // The current revision is already older than what could be in the RC table
1072                         // 6h tolerance because the RC might not be cleaned out regularly
1073                         return false;
1074                 }
1075
1076                 // Check for cached results
1077                 $key = wfMemcKey( 'unpatrollable-page', $title->getArticleID() );
1078                 $cache = ObjectCache::getMainWANInstance();
1079                 if ( $cache->get( $key ) ) {
1080                         return false;
1081                 }
1082
1083                 $dbr = wfGetDB( DB_REPLICA );
1084                 $oldestRevisionTimestamp = $dbr->selectField(
1085                         'revision',
1086                         'MIN( rev_timestamp )',
1087                         [ 'rev_page' => $title->getArticleID() ],
1088                         __METHOD__
1089                 );
1090
1091                 // New page patrol: Get the timestamp of the oldest revison which
1092                 // the revision table holds for the given page. Then we look
1093                 // whether it's within the RC lifespan and if it is, we try
1094                 // to get the recentchanges row belonging to that entry
1095                 // (with rc_new = 1).
1096                 $recentPageCreation = false;
1097                 if ( $oldestRevisionTimestamp
1098                         && RecentChange::isInRCLifespan( $oldestRevisionTimestamp, 21600 )
1099                 ) {
1100                         // 6h tolerance because the RC might not be cleaned out regularly
1101                         $recentPageCreation = true;
1102                         $rc = RecentChange::newFromConds(
1103                                 [
1104                                         'rc_new' => 1,
1105                                         'rc_timestamp' => $oldestRevisionTimestamp,
1106                                         'rc_namespace' => $title->getNamespace(),
1107                                         'rc_cur_id' => $title->getArticleID()
1108                                 ],
1109                                 __METHOD__
1110                         );
1111                         if ( $rc ) {
1112                                 // Use generic patrol message for new pages
1113                                 $markPatrolledMsg = wfMessage( 'markaspatrolledtext' );
1114                         }
1115                 }
1116
1117                 // File patrol: Get the timestamp of the latest upload for this page,
1118                 // check whether it is within the RC lifespan and if it is, we try
1119                 // to get the recentchanges row belonging to that entry
1120                 // (with rc_type = RC_LOG, rc_log_type = upload).
1121                 $recentFileUpload = false;
1122                 if ( ( !$rc || $rc->getAttribute( 'rc_patrolled' ) ) && $wgUseFilePatrol
1123                         && $title->getNamespace() === NS_FILE ) {
1124                         // Retrieve timestamp of most recent upload
1125                         $newestUploadTimestamp = $dbr->selectField(
1126                                 'image',
1127                                 'MAX( img_timestamp )',
1128                                 [ 'img_name' => $title->getDBkey() ],
1129                                 __METHOD__
1130                         );
1131                         if ( $newestUploadTimestamp
1132                                 && RecentChange::isInRCLifespan( $newestUploadTimestamp, 21600 )
1133                         ) {
1134                                 // 6h tolerance because the RC might not be cleaned out regularly
1135                                 $recentFileUpload = true;
1136                                 $rc = RecentChange::newFromConds(
1137                                         [
1138                                                 'rc_type' => RC_LOG,
1139                                                 'rc_log_type' => 'upload',
1140                                                 'rc_timestamp' => $newestUploadTimestamp,
1141                                                 'rc_namespace' => NS_FILE,
1142                                                 'rc_cur_id' => $title->getArticleID()
1143                                         ],
1144                                         __METHOD__,
1145                                         [ 'USE INDEX' => 'rc_timestamp' ]
1146                                 );
1147                                 if ( $rc ) {
1148                                         // Use patrol message specific to files
1149                                         $markPatrolledMsg = wfMessage( 'markaspatrolledtext-file' );
1150                                 }
1151                         }
1152                 }
1153
1154                 if ( !$recentPageCreation && !$recentFileUpload ) {
1155                         // Page creation and latest upload (for files) is too old to be in RC
1156
1157                         // We definitely can't patrol so cache the information
1158                         // When a new file version is uploaded, the cache is cleared
1159                         $cache->set( $key, '1' );
1160
1161                         return false;
1162                 }
1163
1164                 if ( !$rc ) {
1165                         // Don't cache: This can be hit if the page gets accessed very fast after
1166                         // its creation / latest upload or in case we have high replica DB lag. In case
1167                         // the revision is too old, we will already return above.
1168                         return false;
1169                 }
1170
1171                 if ( $rc->getAttribute( 'rc_patrolled' ) ) {
1172                         // Patrolled RC entry around
1173
1174                         // Cache the information we gathered above in case we can't patrol
1175                         // Don't cache in case we can patrol as this could change
1176                         $cache->set( $key, '1' );
1177
1178                         return false;
1179                 }
1180
1181                 if ( $rc->getPerformer()->equals( $user ) ) {
1182                         // Don't show a patrol link for own creations/uploads. If the user could
1183                         // patrol them, they already would be patrolled
1184                         return false;
1185                 }
1186
1187                 $outputPage->preventClickjacking();
1188                 if ( $wgEnableAPI && $wgEnableWriteAPI && $user->isAllowed( 'writeapi' ) ) {
1189                         $outputPage->addModules( 'mediawiki.page.patrol.ajax' );
1190                 }
1191
1192                 $link = Linker::linkKnown(
1193                         $title,
1194                         $markPatrolledMsg->escaped(),
1195                         [],
1196                         [
1197                                 'action' => 'markpatrolled',
1198                                 'rcid' => $rc->getAttribute( 'rc_id' ),
1199                         ]
1200                 );
1201
1202                 $outputPage->addHTML(
1203                         "<div class='patrollink' data-mw='interface'>" .
1204                                 wfMessage( 'markaspatrolledlink' )->rawParams( $link )->escaped() .
1205                         '</div>'
1206                 );
1207
1208                 return true;
1209         }
1210
1211         /**
1212          * Purge the cache used to check if it is worth showing the patrol footer
1213          * For example, it is done during re-uploads when file patrol is used.
1214          * @param int $articleID ID of the article to purge
1215          * @since 1.27
1216          */
1217         public static function purgePatrolFooterCache( $articleID ) {
1218                 $cache = ObjectCache::getMainWANInstance();
1219                 $cache->delete( wfMemcKey( 'unpatrollable-page', $articleID ) );
1220         }
1221
1222         /**
1223          * Show the error text for a missing article. For articles in the MediaWiki
1224          * namespace, show the default message text. To be called from Article::view().
1225          */
1226         public function showMissingArticle() {
1227                 global $wgSend404Code;
1228
1229                 $outputPage = $this->getContext()->getOutput();
1230                 // Whether the page is a root user page of an existing user (but not a subpage)
1231                 $validUserPage = false;
1232
1233                 $title = $this->getTitle();
1234
1235                 # Show info in user (talk) namespace. Does the user exist? Is he blocked?
1236                 if ( $title->getNamespace() == NS_USER
1237                         || $title->getNamespace() == NS_USER_TALK
1238                 ) {
1239                         $rootPart = explode( '/', $title->getText() )[0];
1240                         $user = User::newFromName( $rootPart, false /* allow IP users*/ );
1241                         $ip = User::isIP( $rootPart );
1242                         $block = Block::newFromTarget( $user, $user );
1243
1244                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
1245                                 $outputPage->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n\$1\n</div>",
1246                                         [ 'userpage-userdoesnotexist-view', wfEscapeWikiText( $rootPart ) ] );
1247                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
1248                                 # Show log extract if the user is currently blocked
1249                                 LogEventsList::showLogExtract(
1250                                         $outputPage,
1251                                         'block',
1252                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
1253                                         '',
1254                                         [
1255                                                 'lim' => 1,
1256                                                 'showIfEmpty' => false,
1257                                                 'msgKey' => [
1258                                                         'blocked-notice-logextract',
1259                                                         $user->getName() # Support GENDER in notice
1260                                                 ]
1261                                         ]
1262                                 );
1263                                 $validUserPage = !$title->isSubpage();
1264                         } else {
1265                                 $validUserPage = !$title->isSubpage();
1266                         }
1267                 }
1268
1269                 Hooks::run( 'ShowMissingArticle', [ $this ] );
1270
1271                 # Show delete and move logs if there were any such events.
1272                 # The logging query can DOS the site when bots/crawlers cause 404 floods,
1273                 # so be careful showing this. 404 pages must be cheap as they are hard to cache.
1274                 $cache = ObjectCache::getMainStashInstance();
1275                 $key = wfMemcKey( 'page-recent-delete', md5( $title->getPrefixedText() ) );
1276                 $loggedIn = $this->getContext()->getUser()->isLoggedIn();
1277                 if ( $loggedIn || $cache->get( $key ) ) {
1278                         $logTypes = [ 'delete', 'move' ];
1279                         $conds = [ "log_action != 'revision'" ];
1280                         // Give extensions a chance to hide their (unrelated) log entries
1281                         Hooks::run( 'Article::MissingArticleConditions', [ &$conds, $logTypes ] );
1282                         LogEventsList::showLogExtract(
1283                                 $outputPage,
1284                                 $logTypes,
1285                                 $title,
1286                                 '',
1287                                 [
1288                                         'lim' => 10,
1289                                         'conds' => $conds,
1290                                         'showIfEmpty' => false,
1291                                         'msgKey' => [ $loggedIn
1292                                                 ? 'moveddeleted-notice'
1293                                                 : 'moveddeleted-notice-recent'
1294                                         ]
1295                                 ]
1296                         );
1297                 }
1298
1299                 if ( !$this->mPage->hasViewableContent() && $wgSend404Code && !$validUserPage ) {
1300                         // If there's no backing content, send a 404 Not Found
1301                         // for better machine handling of broken links.
1302                         $this->getContext()->getRequest()->response()->statusHeader( 404 );
1303                 }
1304
1305                 // Also apply the robot policy for nonexisting pages (even if a 404 was used for sanity)
1306                 $policy = $this->getRobotPolicy( 'view' );
1307                 $outputPage->setIndexPolicy( $policy['index'] );
1308                 $outputPage->setFollowPolicy( $policy['follow'] );
1309
1310                 $hookResult = Hooks::run( 'BeforeDisplayNoArticleText', [ $this ] );
1311
1312                 if ( !$hookResult ) {
1313                         return;
1314                 }
1315
1316                 # Show error message
1317                 $oldid = $this->getOldID();
1318                 if ( !$oldid && $title->getNamespace() === NS_MEDIAWIKI && $title->hasSourceText() ) {
1319                         $outputPage->addParserOutput( $this->getContentObject()->getParserOutput( $title ) );
1320                 } else {
1321                         if ( $oldid ) {
1322                                 $text = wfMessage( 'missing-revision', $oldid )->plain();
1323                         } elseif ( $title->quickUserCan( 'create', $this->getContext()->getUser() )
1324                                 && $title->quickUserCan( 'edit', $this->getContext()->getUser() )
1325                         ) {
1326                                 $message = $this->getContext()->getUser()->isLoggedIn() ? 'noarticletext' : 'noarticletextanon';
1327                                 $text = wfMessage( $message )->plain();
1328                         } else {
1329                                 $text = wfMessage( 'noarticletext-nopermission' )->plain();
1330                         }
1331
1332                         $dir = $this->getContext()->getLanguage()->getDir();
1333                         $lang = $this->getContext()->getLanguage()->getCode();
1334                         $outputPage->addWikiText( Xml::openElement( 'div', [
1335                                 'class' => "noarticletext mw-content-$dir",
1336                                 'dir' => $dir,
1337                                 'lang' => $lang,
1338                         ] ) . "\n$text\n</div>" );
1339                 }
1340         }
1341
1342         /**
1343          * If the revision requested for view is deleted, check permissions.
1344          * Send either an error message or a warning header to the output.
1345          *
1346          * @return bool True if the view is allowed, false if not.
1347          */
1348         public function showDeletedRevisionHeader() {
1349                 if ( !$this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1350                         // Not deleted
1351                         return true;
1352                 }
1353
1354                 $outputPage = $this->getContext()->getOutput();
1355                 $user = $this->getContext()->getUser();
1356                 // If the user is not allowed to see it...
1357                 if ( !$this->mRevision->userCan( Revision::DELETED_TEXT, $user ) ) {
1358                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1359                                 'rev-deleted-text-permission' );
1360
1361                         return false;
1362                 // If the user needs to confirm that they want to see it...
1363                 } elseif ( $this->getContext()->getRequest()->getInt( 'unhide' ) != 1 ) {
1364                         # Give explanation and add a link to view the revision...
1365                         $oldid = intval( $this->getOldID() );
1366                         $link = $this->getTitle()->getFullURL( "oldid={$oldid}&unhide=1" );
1367                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1368                                 'rev-suppressed-text-unhide' : 'rev-deleted-text-unhide';
1369                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1370                                 [ $msg, $link ] );
1371
1372                         return false;
1373                 // We are allowed to see...
1374                 } else {
1375                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1376                                 'rev-suppressed-text-view' : 'rev-deleted-text-view';
1377                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", $msg );
1378
1379                         return true;
1380                 }
1381         }
1382
1383         /**
1384          * Generate the navigation links when browsing through an article revisions
1385          * It shows the information as:
1386          *   Revision as of \<date\>; view current revision
1387          *   \<- Previous version | Next Version -\>
1388          *
1389          * @param int $oldid Revision ID of this article revision
1390          */
1391         public function setOldSubtitle( $oldid = 0 ) {
1392                 if ( !Hooks::run( 'DisplayOldSubtitle', [ &$this, &$oldid ] ) ) {
1393                         return;
1394                 }
1395
1396                 $context = $this->getContext();
1397                 $unhide = $context->getRequest()->getInt( 'unhide' ) == 1;
1398
1399                 # Cascade unhide param in links for easy deletion browsing
1400                 $extraParams = [];
1401                 if ( $unhide ) {
1402                         $extraParams['unhide'] = 1;
1403                 }
1404
1405                 if ( $this->mRevision && $this->mRevision->getId() === $oldid ) {
1406                         $revision = $this->mRevision;
1407                 } else {
1408                         $revision = Revision::newFromId( $oldid );
1409                 }
1410
1411                 $timestamp = $revision->getTimestamp();
1412
1413                 $current = ( $oldid == $this->mPage->getLatest() );
1414                 $language = $context->getLanguage();
1415                 $user = $context->getUser();
1416
1417                 $td = $language->userTimeAndDate( $timestamp, $user );
1418                 $tddate = $language->userDate( $timestamp, $user );
1419                 $tdtime = $language->userTime( $timestamp, $user );
1420
1421                 # Show user links if allowed to see them. If hidden, then show them only if requested...
1422                 $userlinks = Linker::revUserTools( $revision, !$unhide );
1423
1424                 $infomsg = $current && !$context->msg( 'revision-info-current' )->isDisabled()
1425                         ? 'revision-info-current'
1426                         : 'revision-info';
1427
1428                 $outputPage = $context->getOutput();
1429                 $revisionInfo = "<div id=\"mw-{$infomsg}\">" .
1430                         $context->msg( $infomsg, $td )
1431                                 ->rawParams( $userlinks )
1432                                 ->params( $revision->getId(), $tddate, $tdtime, $revision->getUserText() )
1433                                 ->rawParams( Linker::revComment( $revision, true, true ) )
1434                                 ->parse() .
1435                         "</div>";
1436
1437                 $lnk = $current
1438                         ? $context->msg( 'currentrevisionlink' )->escaped()
1439                         : Linker::linkKnown(
1440                                 $this->getTitle(),
1441                                 $context->msg( 'currentrevisionlink' )->escaped(),
1442                                 [],
1443                                 $extraParams
1444                         );
1445                 $curdiff = $current
1446                         ? $context->msg( 'diff' )->escaped()
1447                         : Linker::linkKnown(
1448                                 $this->getTitle(),
1449                                 $context->msg( 'diff' )->escaped(),
1450                                 [],
1451                                 [
1452                                         'diff' => 'cur',
1453                                         'oldid' => $oldid
1454                                 ] + $extraParams
1455                         );
1456                 $prev = $this->getTitle()->getPreviousRevisionID( $oldid );
1457                 $prevlink = $prev
1458                         ? Linker::linkKnown(
1459                                 $this->getTitle(),
1460                                 $context->msg( 'previousrevision' )->escaped(),
1461                                 [],
1462                                 [
1463                                         'direction' => 'prev',
1464                                         'oldid' => $oldid
1465                                 ] + $extraParams
1466                         )
1467                         : $context->msg( 'previousrevision' )->escaped();
1468                 $prevdiff = $prev
1469                         ? Linker::linkKnown(
1470                                 $this->getTitle(),
1471                                 $context->msg( 'diff' )->escaped(),
1472                                 [],
1473                                 [
1474                                         'diff' => 'prev',
1475                                         'oldid' => $oldid
1476                                 ] + $extraParams
1477                         )
1478                         : $context->msg( 'diff' )->escaped();
1479                 $nextlink = $current
1480                         ? $context->msg( 'nextrevision' )->escaped()
1481                         : Linker::linkKnown(
1482                                 $this->getTitle(),
1483                                 $context->msg( 'nextrevision' )->escaped(),
1484                                 [],
1485                                 [
1486                                         'direction' => 'next',
1487                                         'oldid' => $oldid
1488                                 ] + $extraParams
1489                         );
1490                 $nextdiff = $current
1491                         ? $context->msg( 'diff' )->escaped()
1492                         : Linker::linkKnown(
1493                                 $this->getTitle(),
1494                                 $context->msg( 'diff' )->escaped(),
1495                                 [],
1496                                 [
1497                                         'diff' => 'next',
1498                                         'oldid' => $oldid
1499                                 ] + $extraParams
1500                         );
1501
1502                 $cdel = Linker::getRevDeleteLink( $user, $revision, $this->getTitle() );
1503                 if ( $cdel !== '' ) {
1504                         $cdel .= ' ';
1505                 }
1506
1507                 // the outer div is need for styling the revision info and nav in MobileFrontend
1508                 $outputPage->addSubtitle( "<div class=\"mw-revision\">" . $revisionInfo .
1509                         "<div id=\"mw-revision-nav\">" . $cdel .
1510                         $context->msg( 'revision-nav' )->rawParams(
1511                                 $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff
1512                         )->escaped() . "</div></div>" );
1513         }
1514
1515         /**
1516          * Return the HTML for the top of a redirect page
1517          *
1518          * Chances are you should just be using the ParserOutput from
1519          * WikitextContent::getParserOutput instead of calling this for redirects.
1520          *
1521          * @param Title|array $target Destination(s) to redirect
1522          * @param bool $appendSubtitle [optional]
1523          * @param bool $forceKnown Should the image be shown as a bluelink regardless of existence?
1524          * @return string Containing HTML with redirect link
1525          */
1526         public function viewRedirect( $target, $appendSubtitle = true, $forceKnown = false ) {
1527                 $lang = $this->getTitle()->getPageLanguage();
1528                 $out = $this->getContext()->getOutput();
1529                 if ( $appendSubtitle ) {
1530                         $out->addSubtitle( wfMessage( 'redirectpagesub' ) );
1531                 }
1532                 $out->addModuleStyles( 'mediawiki.action.view.redirectPage' );
1533                 return static::getRedirectHeaderHtml( $lang, $target, $forceKnown );
1534         }
1535
1536         /**
1537          * Return the HTML for the top of a redirect page
1538          *
1539          * Chances are you should just be using the ParserOutput from
1540          * WikitextContent::getParserOutput instead of calling this for redirects.
1541          *
1542          * @since 1.23
1543          * @param Language $lang
1544          * @param Title|array $target Destination(s) to redirect
1545          * @param bool $forceKnown Should the image be shown as a bluelink regardless of existence?
1546          * @return string Containing HTML with redirect link
1547          */
1548         public static function getRedirectHeaderHtml( Language $lang, $target, $forceKnown = false ) {
1549                 if ( !is_array( $target ) ) {
1550                         $target = [ $target ];
1551                 }
1552
1553                 $html = '<ul class="redirectText">';
1554                 /** @var Title $title */
1555                 foreach ( $target as $title ) {
1556                         $html .= '<li>' . Linker::link(
1557                                 $title,
1558                                 htmlspecialchars( $title->getFullText() ),
1559                                 [],
1560                                 // Make sure wiki page redirects are not followed
1561                                 $title->isRedirect() ? [ 'redirect' => 'no' ] : [],
1562                                 ( $forceKnown ? [ 'known', 'noclasses' ] : [] )
1563                         ) . '</li>';
1564                 }
1565                 $html .= '</ul>';
1566
1567                 $redirectToText = wfMessage( 'redirectto' )->inLanguage( $lang )->escaped();
1568
1569                 return '<div class="redirectMsg">' .
1570                         '<p>' . $redirectToText . '</p>' .
1571                         $html .
1572                         '</div>';
1573         }
1574
1575         /**
1576          * Adds help link with an icon via page indicators.
1577          * Link target can be overridden by a local message containing a wikilink:
1578          * the message key is: 'namespace-' + namespace number + '-helppage'.
1579          * @param string $to Target MediaWiki.org page title or encoded URL.
1580          * @param bool $overrideBaseUrl Whether $url is a full URL, to avoid MW.o.
1581          * @since 1.25
1582          */
1583         public function addHelpLink( $to, $overrideBaseUrl = false ) {
1584                 $msg = wfMessage(
1585                         'namespace-' . $this->getTitle()->getNamespace() . '-helppage'
1586                 );
1587
1588                 $out = $this->getContext()->getOutput();
1589                 if ( !$msg->isDisabled() ) {
1590                         $helpUrl = Skin::makeUrl( $msg->plain() );
1591                         $out->addHelpLink( $helpUrl, true );
1592                 } else {
1593                         $out->addHelpLink( $to, $overrideBaseUrl );
1594                 }
1595         }
1596
1597         /**
1598          * Handle action=render
1599          */
1600         public function render() {
1601                 $this->getContext()->getRequest()->response()->header( 'X-Robots-Tag: noindex' );
1602                 $this->getContext()->getOutput()->setArticleBodyOnly( true );
1603                 $this->getContext()->getOutput()->enableSectionEditLinks( false );
1604                 $this->view();
1605         }
1606
1607         /**
1608          * action=protect handler
1609          */
1610         public function protect() {
1611                 $form = new ProtectionForm( $this );
1612                 $form->execute();
1613         }
1614
1615         /**
1616          * action=unprotect handler (alias)
1617          */
1618         public function unprotect() {
1619                 $this->protect();
1620         }
1621
1622         /**
1623          * UI entry point for page deletion
1624          */
1625         public function delete() {
1626                 # This code desperately needs to be totally rewritten
1627
1628                 $title = $this->getTitle();
1629                 $context = $this->getContext();
1630                 $user = $context->getUser();
1631                 $request = $context->getRequest();
1632
1633                 # Check permissions
1634                 $permissionErrors = $title->getUserPermissionsErrors( 'delete', $user );
1635                 if ( count( $permissionErrors ) ) {
1636                         throw new PermissionsError( 'delete', $permissionErrors );
1637                 }
1638
1639                 # Read-only check...
1640                 if ( wfReadOnly() ) {
1641                         throw new ReadOnlyError;
1642                 }
1643
1644                 # Better double-check that it hasn't been deleted yet!
1645                 $this->mPage->loadPageData(
1646                         $request->wasPosted() ? WikiPage::READ_LATEST : WikiPage::READ_NORMAL
1647                 );
1648                 if ( !$this->mPage->exists() ) {
1649                         $deleteLogPage = new LogPage( 'delete' );
1650                         $outputPage = $context->getOutput();
1651                         $outputPage->setPageTitle( $context->msg( 'cannotdelete-title', $title->getPrefixedText() ) );
1652                         $outputPage->wrapWikiMsg( "<div class=\"error mw-error-cannotdelete\">\n$1\n</div>",
1653                                         [ 'cannotdelete', wfEscapeWikiText( $title->getPrefixedText() ) ]
1654                                 );
1655                         $outputPage->addHTML(
1656                                 Xml::element( 'h2', null, $deleteLogPage->getName()->text() )
1657                         );
1658                         LogEventsList::showLogExtract(
1659                                 $outputPage,
1660                                 'delete',
1661                                 $title
1662                         );
1663
1664                         return;
1665                 }
1666
1667                 $deleteReasonList = $request->getText( 'wpDeleteReasonList', 'other' );
1668                 $deleteReason = $request->getText( 'wpReason' );
1669
1670                 if ( $deleteReasonList == 'other' ) {
1671                         $reason = $deleteReason;
1672                 } elseif ( $deleteReason != '' ) {
1673                         // Entry from drop down menu + additional comment
1674                         $colonseparator = wfMessage( 'colon-separator' )->inContentLanguage()->text();
1675                         $reason = $deleteReasonList . $colonseparator . $deleteReason;
1676                 } else {
1677                         $reason = $deleteReasonList;
1678                 }
1679
1680                 if ( $request->wasPosted() && $user->matchEditToken( $request->getVal( 'wpEditToken' ),
1681                         [ 'delete', $this->getTitle()->getPrefixedText() ] )
1682                 ) {
1683                         # Flag to hide all contents of the archived revisions
1684                         $suppress = $request->getVal( 'wpSuppress' ) && $user->isAllowed( 'suppressrevision' );
1685
1686                         $this->doDelete( $reason, $suppress );
1687
1688                         WatchAction::doWatchOrUnwatch( $request->getCheck( 'wpWatch' ), $title, $user );
1689
1690                         return;
1691                 }
1692
1693                 // Generate deletion reason
1694                 $hasHistory = false;
1695                 if ( !$reason ) {
1696                         try {
1697                                 $reason = $this->generateReason( $hasHistory );
1698                         } catch ( Exception $e ) {
1699                                 # if a page is horribly broken, we still want to be able to
1700                                 # delete it. So be lenient about errors here.
1701                                 wfDebug( "Error while building auto delete summary: $e" );
1702                                 $reason = '';
1703                         }
1704                 }
1705
1706                 // If the page has a history, insert a warning
1707                 if ( $hasHistory ) {
1708                         $title = $this->getTitle();
1709
1710                         // The following can use the real revision count as this is only being shown for users
1711                         // that can delete this page.
1712                         // This, as a side-effect, also makes sure that the following query isn't being run for
1713                         // pages with a larger history, unless the user has the 'bigdelete' right
1714                         // (and is about to delete this page).
1715                         $dbr = wfGetDB( DB_REPLICA );
1716                         $revisions = $edits = (int)$dbr->selectField(
1717                                 'revision',
1718                                 'COUNT(rev_page)',
1719                                 [ 'rev_page' => $title->getArticleID() ],
1720                                 __METHOD__
1721                         );
1722
1723                         // @todo FIXME: i18n issue/patchwork message
1724                         $context->getOutput()->addHTML(
1725                                 '<strong class="mw-delete-warning-revisions">' .
1726                                 $context->msg( 'historywarning' )->numParams( $revisions )->parse() .
1727                                 $context->msg( 'word-separator' )->escaped() . Linker::linkKnown( $title,
1728                                         $context->msg( 'history' )->escaped(),
1729                                         [],
1730                                         [ 'action' => 'history' ] ) .
1731                                 '</strong>'
1732                         );
1733
1734                         if ( $title->isBigDeletion() ) {
1735                                 global $wgDeleteRevisionsLimit;
1736                                 $context->getOutput()->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
1737                                         [
1738                                                 'delete-warning-toobig',
1739                                                 $context->getLanguage()->formatNum( $wgDeleteRevisionsLimit )
1740                                         ]
1741                                 );
1742                         }
1743                 }
1744
1745                 $this->confirmDelete( $reason );
1746         }
1747
1748         /**
1749          * Output deletion confirmation dialog
1750          * @todo FIXME: Move to another file?
1751          * @param string $reason Prefilled reason
1752          */
1753         public function confirmDelete( $reason ) {
1754                 wfDebug( "Article::confirmDelete\n" );
1755
1756                 $title = $this->getTitle();
1757                 $ctx = $this->getContext();
1758                 $outputPage = $ctx->getOutput();
1759                 $useMediaWikiUIEverywhere = $ctx->getConfig()->get( 'UseMediaWikiUIEverywhere' );
1760                 $outputPage->setPageTitle( wfMessage( 'delete-confirm', $title->getPrefixedText() ) );
1761                 $outputPage->addBacklinkSubtitle( $title );
1762                 $outputPage->setRobotPolicy( 'noindex,nofollow' );
1763                 $backlinkCache = $title->getBacklinkCache();
1764                 if ( $backlinkCache->hasLinks( 'pagelinks' ) || $backlinkCache->hasLinks( 'templatelinks' ) ) {
1765                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1766                                 'deleting-backlinks-warning' );
1767                 }
1768                 $outputPage->addWikiMsg( 'confirmdeletetext' );
1769
1770                 Hooks::run( 'ArticleConfirmDelete', [ $this, $outputPage, &$reason ] );
1771
1772                 $user = $this->getContext()->getUser();
1773
1774                 if ( $user->isAllowed( 'suppressrevision' ) ) {
1775                         $suppress = Html::openElement( 'div', [ 'id' => 'wpDeleteSuppressRow' ] ) .
1776                                 Xml::checkLabel( wfMessage( 'revdelete-suppress' )->text(),
1777                                         'wpSuppress', 'wpSuppress', false, [ 'tabindex' => '4' ] ) .
1778                                 Html::closeElement( 'div' );
1779                 } else {
1780                         $suppress = '';
1781                 }
1782                 $checkWatch = $user->getBoolOption( 'watchdeletion' ) || $user->isWatched( $title );
1783
1784                 $form = Html::openElement( 'form', [ 'method' => 'post',
1785                         'action' => $title->getLocalURL( 'action=delete' ), 'id' => 'deleteconfirm' ] ) .
1786                         Html::openElement( 'fieldset', [ 'id' => 'mw-delete-table' ] ) .
1787                         Html::element( 'legend', null, wfMessage( 'delete-legend' )->text() ) .
1788                         Html::openElement( 'div', [ 'id' => 'mw-deleteconfirm-table' ] ) .
1789                         Html::openElement( 'div', [ 'id' => 'wpDeleteReasonListRow' ] ) .
1790                         Html::label( wfMessage( 'deletecomment' )->text(), 'wpDeleteReasonList' ) .
1791                         '&nbsp;' .
1792                         Xml::listDropDown(
1793                                 'wpDeleteReasonList',
1794                                 wfMessage( 'deletereason-dropdown' )->inContentLanguage()->text(),
1795                                 wfMessage( 'deletereasonotherlist' )->inContentLanguage()->text(),
1796                                 '',
1797                                 'wpReasonDropDown',
1798                                 1
1799                         ) .
1800                         Html::closeElement( 'div' ) .
1801                         Html::openElement( 'div', [ 'id' => 'wpDeleteReasonRow' ] ) .
1802                         Html::label( wfMessage( 'deleteotherreason' )->text(), 'wpReason' ) .
1803                         '&nbsp;' .
1804                         Html::input( 'wpReason', $reason, 'text', [
1805                                 'size' => '60',
1806                                 'maxlength' => '255',
1807                                 'tabindex' => '2',
1808                                 'id' => 'wpReason',
1809                                 'class' => 'mw-ui-input-inline',
1810                                 'autofocus'
1811                         ] ) .
1812                         Html::closeElement( 'div' );
1813
1814                 # Disallow watching if user is not logged in
1815                 if ( $user->isLoggedIn() ) {
1816                         $form .=
1817                                         Xml::checkLabel( wfMessage( 'watchthis' )->text(),
1818                                                 'wpWatch', 'wpWatch', $checkWatch, [ 'tabindex' => '3' ] );
1819                 }
1820
1821                 $form .=
1822                                 Html::openElement( 'div' ) .
1823                                 $suppress .
1824                                         Xml::submitButton( wfMessage( 'deletepage' )->text(),
1825                                                 [
1826                                                         'name' => 'wpConfirmB',
1827                                                         'id' => 'wpConfirmB',
1828                                                         'tabindex' => '5',
1829                                                         'class' => $useMediaWikiUIEverywhere ? 'mw-ui-button mw-ui-destructive' : '',
1830                                                 ]
1831                                         ) .
1832                                 Html::closeElement( 'div' ) .
1833                         Html::closeElement( 'div' ) .
1834                         Xml::closeElement( 'fieldset' ) .
1835                         Html::hidden(
1836                                 'wpEditToken',
1837                                 $user->getEditToken( [ 'delete', $title->getPrefixedText() ] )
1838                         ) .
1839                         Xml::closeElement( 'form' );
1840
1841                         if ( $user->isAllowed( 'editinterface' ) ) {
1842                                 $link = Linker::linkKnown(
1843                                         $ctx->msg( 'deletereason-dropdown' )->inContentLanguage()->getTitle(),
1844                                         wfMessage( 'delete-edit-reasonlist' )->escaped(),
1845                                         [],
1846                                         [ 'action' => 'edit' ]
1847                                 );
1848                                 $form .= '<p class="mw-delete-editreasons">' . $link . '</p>';
1849                         }
1850
1851                 $outputPage->addHTML( $form );
1852
1853                 $deleteLogPage = new LogPage( 'delete' );
1854                 $outputPage->addHTML( Xml::element( 'h2', null, $deleteLogPage->getName()->text() ) );
1855                 LogEventsList::showLogExtract( $outputPage, 'delete', $title );
1856         }
1857
1858         /**
1859          * Perform a deletion and output success or failure messages
1860          * @param string $reason
1861          * @param bool $suppress
1862          */
1863         public function doDelete( $reason, $suppress = false ) {
1864                 $error = '';
1865                 $context = $this->getContext();
1866                 $outputPage = $context->getOutput();
1867                 $user = $context->getUser();
1868                 $status = $this->mPage->doDeleteArticleReal( $reason, $suppress, 0, true, $error, $user );
1869
1870                 if ( $status->isGood() ) {
1871                         $deleted = $this->getTitle()->getPrefixedText();
1872
1873                         $outputPage->setPageTitle( wfMessage( 'actioncomplete' ) );
1874                         $outputPage->setRobotPolicy( 'noindex,nofollow' );
1875
1876                         $loglink = '[[Special:Log/delete|' . wfMessage( 'deletionlog' )->text() . ']]';
1877
1878                         $outputPage->addWikiMsg( 'deletedtext', wfEscapeWikiText( $deleted ), $loglink );
1879
1880                         Hooks::run( 'ArticleDeleteAfterSuccess', [ $this->getTitle(), $outputPage ] );
1881
1882                         $outputPage->returnToMain( false );
1883                 } else {
1884                         $outputPage->setPageTitle(
1885                                 wfMessage( 'cannotdelete-title',
1886                                         $this->getTitle()->getPrefixedText() )
1887                         );
1888
1889                         if ( $error == '' ) {
1890                                 $outputPage->addWikiText(
1891                                         "<div class=\"error mw-error-cannotdelete\">\n" . $status->getWikiText() . "\n</div>"
1892                                 );
1893                                 $deleteLogPage = new LogPage( 'delete' );
1894                                 $outputPage->addHTML( Xml::element( 'h2', null, $deleteLogPage->getName()->text() ) );
1895
1896                                 LogEventsList::showLogExtract(
1897                                         $outputPage,
1898                                         'delete',
1899                                         $this->getTitle()
1900                                 );
1901                         } else {
1902                                 $outputPage->addHTML( $error );
1903                         }
1904                 }
1905         }
1906
1907         /* Caching functions */
1908
1909         /**
1910          * checkLastModified returns true if it has taken care of all
1911          * output to the client that is necessary for this request.
1912          * (that is, it has sent a cached version of the page)
1913          *
1914          * @return bool True if cached version send, false otherwise
1915          */
1916         protected function tryFileCache() {
1917                 static $called = false;
1918
1919                 if ( $called ) {
1920                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
1921                         return false;
1922                 }
1923
1924                 $called = true;
1925                 if ( $this->isFileCacheable() ) {
1926                         $cache = new HTMLFileCache( $this->getTitle(), 'view' );
1927                         if ( $cache->isCacheGood( $this->mPage->getTouched() ) ) {
1928                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
1929                                 $cache->loadFromFileCache( $this->getContext() );
1930                                 return true;
1931                         } else {
1932                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
1933                                 ob_start( [ &$cache, 'saveToFileCache' ] );
1934                         }
1935                 } else {
1936                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
1937                 }
1938
1939                 return false;
1940         }
1941
1942         /**
1943          * Check if the page can be cached
1944          * @param integer $mode One of the HTMLFileCache::MODE_* constants (since 1.28)
1945          * @return bool
1946          */
1947         public function isFileCacheable( $mode = HTMLFileCache::MODE_NORMAL ) {
1948                 $cacheable = false;
1949
1950                 if ( HTMLFileCache::useFileCache( $this->getContext(), $mode ) ) {
1951                         $cacheable = $this->mPage->getId()
1952                                 && !$this->mRedirectedFrom && !$this->getTitle()->isRedirect();
1953                         // Extension may have reason to disable file caching on some pages.
1954                         if ( $cacheable ) {
1955                                 $cacheable = Hooks::run( 'IsFileCacheable', [ &$this ] );
1956                         }
1957                 }
1958
1959                 return $cacheable;
1960         }
1961
1962         /**#@-*/
1963
1964         /**
1965          * Lightweight method to get the parser output for a page, checking the parser cache
1966          * and so on. Doesn't consider most of the stuff that WikiPage::view is forced to
1967          * consider, so it's not appropriate to use there.
1968          *
1969          * @since 1.16 (r52326) for LiquidThreads
1970          *
1971          * @param int|null $oldid Revision ID or null
1972          * @param User $user The relevant user
1973          * @return ParserOutput|bool ParserOutput or false if the given revision ID is not found
1974          */
1975         public function getParserOutput( $oldid = null, User $user = null ) {
1976                 // XXX: bypasses mParserOptions and thus setParserOptions()
1977
1978                 if ( $user === null ) {
1979                         $parserOptions = $this->getParserOptions();
1980                 } else {
1981                         $parserOptions = $this->mPage->makeParserOptions( $user );
1982                 }
1983
1984                 return $this->mPage->getParserOutput( $parserOptions, $oldid );
1985         }
1986
1987         /**
1988          * Override the ParserOptions used to render the primary article wikitext.
1989          *
1990          * @param ParserOptions $options
1991          * @throws MWException If the parser options where already initialized.
1992          */
1993         public function setParserOptions( ParserOptions $options ) {
1994                 if ( $this->mParserOptions ) {
1995                         throw new MWException( "can't change parser options after they have already been set" );
1996                 }
1997
1998                 // clone, so if $options is modified later, it doesn't confuse the parser cache.
1999                 $this->mParserOptions = clone $options;
2000         }
2001
2002         /**
2003          * Get parser options suitable for rendering the primary article wikitext
2004          * @return ParserOptions
2005          */
2006         public function getParserOptions() {
2007                 if ( !$this->mParserOptions ) {
2008                         $this->mParserOptions = $this->mPage->makeParserOptions( $this->getContext() );
2009                 }
2010                 // Clone to allow modifications of the return value without affecting cache
2011                 return clone $this->mParserOptions;
2012         }
2013
2014         /**
2015          * Sets the context this Article is executed in
2016          *
2017          * @param IContextSource $context
2018          * @since 1.18
2019          */
2020         public function setContext( $context ) {
2021                 $this->mContext = $context;
2022         }
2023
2024         /**
2025          * Gets the context this Article is executed in
2026          *
2027          * @return IContextSource
2028          * @since 1.18
2029          */
2030         public function getContext() {
2031                 if ( $this->mContext instanceof IContextSource ) {
2032                         return $this->mContext;
2033                 } else {
2034                         wfDebug( __METHOD__ . " called and \$mContext is null. " .
2035                                 "Return RequestContext::getMain(); for sanity\n" );
2036                         return RequestContext::getMain();
2037                 }
2038         }
2039
2040         /**
2041          * Use PHP's magic __get handler to handle accessing of
2042          * raw WikiPage fields for backwards compatibility.
2043          *
2044          * @param string $fname Field name
2045          * @return mixed
2046          */
2047         public function __get( $fname ) {
2048                 if ( property_exists( $this->mPage, $fname ) ) {
2049                         # wfWarn( "Access to raw $fname field " . __CLASS__ );
2050                         return $this->mPage->$fname;
2051                 }
2052                 trigger_error( 'Inaccessible property via __get(): ' . $fname, E_USER_NOTICE );
2053         }
2054
2055         /**
2056          * Use PHP's magic __set handler to handle setting of
2057          * raw WikiPage fields for backwards compatibility.
2058          *
2059          * @param string $fname Field name
2060          * @param mixed $fvalue New value
2061          */
2062         public function __set( $fname, $fvalue ) {
2063                 if ( property_exists( $this->mPage, $fname ) ) {
2064                         # wfWarn( "Access to raw $fname field of " . __CLASS__ );
2065                         $this->mPage->$fname = $fvalue;
2066                 // Note: extensions may want to toss on new fields
2067                 } elseif ( !in_array( $fname, [ 'mContext', 'mPage' ] ) ) {
2068                         $this->mPage->$fname = $fvalue;
2069                 } else {
2070                         trigger_error( 'Inaccessible property via __set(): ' . $fname, E_USER_NOTICE );
2071                 }
2072         }
2073
2074         /**
2075          * Call to WikiPage function for backwards compatibility.
2076          * @see WikiPage::checkFlags
2077          */
2078         public function checkFlags( $flags ) {
2079                 return $this->mPage->checkFlags( $flags );
2080         }
2081
2082         /**
2083          * Call to WikiPage function for backwards compatibility.
2084          * @see WikiPage::checkTouched
2085          */
2086         public function checkTouched() {
2087                 return $this->mPage->checkTouched();
2088         }
2089
2090         /**
2091          * Call to WikiPage function for backwards compatibility.
2092          * @see WikiPage::clearPreparedEdit
2093          */
2094         public function clearPreparedEdit() {
2095                 $this->mPage->clearPreparedEdit();
2096         }
2097
2098         /**
2099          * Call to WikiPage function for backwards compatibility.
2100          * @see WikiPage::doDeleteArticleReal
2101          */
2102         public function doDeleteArticleReal(
2103                 $reason, $suppress = false, $u1 = null, $u2 = null, &$error = '', User $user = null,
2104                 $tags = []
2105         ) {
2106                 return $this->mPage->doDeleteArticleReal(
2107                         $reason, $suppress, $u1, $u2, $error, $user, $tags
2108                 );
2109         }
2110
2111         /**
2112          * Call to WikiPage function for backwards compatibility.
2113          * @see WikiPage::doDeleteUpdates
2114          */
2115         public function doDeleteUpdates( $id, Content $content = null ) {
2116                 return $this->mPage->doDeleteUpdates( $id, $content );
2117         }
2118
2119         /**
2120          * Call to WikiPage function for backwards compatibility.
2121          * @see WikiPage::doEdit
2122          *
2123          * @deprecated since 1.21: use doEditContent() instead.
2124          */
2125         public function doEdit( $text, $summary, $flags = 0, $baseRevId = false, $user = null ) {
2126                 wfDeprecated( __METHOD__, '1.21' );
2127                 return $this->mPage->doEdit( $text, $summary, $flags, $baseRevId, $user );
2128         }
2129
2130         /**
2131          * Call to WikiPage function for backwards compatibility.
2132          * @see WikiPage::doEditContent
2133          */
2134         public function doEditContent( Content $content, $summary, $flags = 0, $baseRevId = false,
2135                 User $user = null, $serialFormat = null
2136         ) {
2137                 return $this->mPage->doEditContent( $content, $summary, $flags, $baseRevId,
2138                         $user, $serialFormat
2139                 );
2140         }
2141
2142         /**
2143          * Call to WikiPage function for backwards compatibility.
2144          * @see WikiPage::doEditUpdates
2145          */
2146         public function doEditUpdates( Revision $revision, User $user, array $options = [] ) {
2147                 return $this->mPage->doEditUpdates( $revision, $user, $options );
2148         }
2149
2150         /**
2151          * Call to WikiPage function for backwards compatibility.
2152          * @see WikiPage::doPurge
2153          */
2154         public function doPurge( $flags = WikiPage::PURGE_ALL ) {
2155                 return $this->mPage->doPurge( $flags );
2156         }
2157
2158         /**
2159          * Call to WikiPage function for backwards compatibility.
2160          * @see WikiPage::getLastPurgeTimestamp
2161          */
2162         public function getLastPurgeTimestamp() {
2163                 return $this->mPage->getLastPurgeTimestamp();
2164         }
2165
2166         /**
2167          * Call to WikiPage function for backwards compatibility.
2168          * @see WikiPage::doViewUpdates
2169          */
2170         public function doViewUpdates( User $user, $oldid = 0 ) {
2171                 $this->mPage->doViewUpdates( $user, $oldid );
2172         }
2173
2174         /**
2175          * Call to WikiPage function for backwards compatibility.
2176          * @see WikiPage::exists
2177          */
2178         public function exists() {
2179                 return $this->mPage->exists();
2180         }
2181
2182         /**
2183          * Call to WikiPage function for backwards compatibility.
2184          * @see WikiPage::followRedirect
2185          */
2186         public function followRedirect() {
2187                 return $this->mPage->followRedirect();
2188         }
2189
2190         /**
2191          * Call to WikiPage function for backwards compatibility.
2192          * @see ContentHandler::getActionOverrides
2193          */
2194         public function getActionOverrides() {
2195                 return $this->mPage->getActionOverrides();
2196         }
2197
2198         /**
2199          * Call to WikiPage function for backwards compatibility.
2200          * @see WikiPage::getAutoDeleteReason
2201          */
2202         public function getAutoDeleteReason( &$hasHistory ) {
2203                 return $this->mPage->getAutoDeleteReason( $hasHistory );
2204         }
2205
2206         /**
2207          * Call to WikiPage function for backwards compatibility.
2208          * @see WikiPage::getCategories
2209          */
2210         public function getCategories() {
2211                 return $this->mPage->getCategories();
2212         }
2213
2214         /**
2215          * Call to WikiPage function for backwards compatibility.
2216          * @see WikiPage::getComment
2217          */
2218         public function getComment( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2219                 return $this->mPage->getComment( $audience, $user );
2220         }
2221
2222         /**
2223          * Call to WikiPage function for backwards compatibility.
2224          * @see WikiPage::getContentHandler
2225          */
2226         public function getContentHandler() {
2227                 return $this->mPage->getContentHandler();
2228         }
2229
2230         /**
2231          * Call to WikiPage function for backwards compatibility.
2232          * @see WikiPage::getContentModel
2233          */
2234         public function getContentModel() {
2235                 return $this->mPage->getContentModel();
2236         }
2237
2238         /**
2239          * Call to WikiPage function for backwards compatibility.
2240          * @see WikiPage::getContributors
2241          */
2242         public function getContributors() {
2243                 return $this->mPage->getContributors();
2244         }
2245
2246         /**
2247          * Call to WikiPage function for backwards compatibility.
2248          * @see WikiPage::getCreator
2249          */
2250         public function getCreator( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2251                 return $this->mPage->getCreator( $audience, $user );
2252         }
2253
2254         /**
2255          * Call to WikiPage function for backwards compatibility.
2256          * @see WikiPage::getDeletionUpdates
2257          */
2258         public function getDeletionUpdates( Content $content = null ) {
2259                 return $this->mPage->getDeletionUpdates( $content );
2260         }
2261
2262         /**
2263          * Call to WikiPage function for backwards compatibility.
2264          * @see WikiPage::getHiddenCategories
2265          */
2266         public function getHiddenCategories() {
2267                 return $this->mPage->getHiddenCategories();
2268         }
2269
2270         /**
2271          * Call to WikiPage function for backwards compatibility.
2272          * @see WikiPage::getId
2273          */
2274         public function getId() {
2275                 return $this->mPage->getId();
2276         }
2277
2278         /**
2279          * Call to WikiPage function for backwards compatibility.
2280          * @see WikiPage::getLatest
2281          */
2282         public function getLatest() {
2283                 return $this->mPage->getLatest();
2284         }
2285
2286         /**
2287          * Call to WikiPage function for backwards compatibility.
2288          * @see WikiPage::getLinksTimestamp
2289          */
2290         public function getLinksTimestamp() {
2291                 return $this->mPage->getLinksTimestamp();
2292         }
2293
2294         /**
2295          * Call to WikiPage function for backwards compatibility.
2296          * @see WikiPage::getMinorEdit
2297          */
2298         public function getMinorEdit() {
2299                 return $this->mPage->getMinorEdit();
2300         }
2301
2302         /**
2303          * Call to WikiPage function for backwards compatibility.
2304          * @see WikiPage::getOldestRevision
2305          */
2306         public function getOldestRevision() {
2307                 return $this->mPage->getOldestRevision();
2308         }
2309
2310         /**
2311          * Call to WikiPage function for backwards compatibility.
2312          * @see WikiPage::getRedirectTarget
2313          */
2314         public function getRedirectTarget() {
2315                 return $this->mPage->getRedirectTarget();
2316         }
2317
2318         /**
2319          * Call to WikiPage function for backwards compatibility.
2320          * @see WikiPage::getRedirectURL
2321          */
2322         public function getRedirectURL( $rt ) {
2323                 return $this->mPage->getRedirectURL( $rt );
2324         }
2325
2326         /**
2327          * Call to WikiPage function for backwards compatibility.
2328          * @see WikiPage::getRevision
2329          */
2330         public function getRevision() {
2331                 return $this->mPage->getRevision();
2332         }
2333
2334         /**
2335          * Call to WikiPage function for backwards compatibility.
2336          * @see WikiPage::getText
2337          * @deprecated since 1.21 use WikiPage::getContent() instead
2338          */
2339         public function getText( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2340                 wfDeprecated( __METHOD__, '1.21' );
2341                 return $this->mPage->getText( $audience, $user );
2342         }
2343
2344         /**
2345          * Call to WikiPage function for backwards compatibility.
2346          * @see WikiPage::getTimestamp
2347          */
2348         public function getTimestamp() {
2349                 return $this->mPage->getTimestamp();
2350         }
2351
2352         /**
2353          * Call to WikiPage function for backwards compatibility.
2354          * @see WikiPage::getTouched
2355          */
2356         public function getTouched() {
2357                 return $this->mPage->getTouched();
2358         }
2359
2360         /**
2361          * Call to WikiPage function for backwards compatibility.
2362          * @see WikiPage::getUndoContent
2363          */
2364         public function getUndoContent( Revision $undo, Revision $undoafter = null ) {
2365                 return $this->mPage->getUndoContent( $undo, $undoafter );
2366         }
2367
2368         /**
2369          * Call to WikiPage function for backwards compatibility.
2370          * @see WikiPage::getUser
2371          */
2372         public function getUser( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2373                 return $this->mPage->getUser( $audience, $user );
2374         }
2375
2376         /**
2377          * Call to WikiPage function for backwards compatibility.
2378          * @see WikiPage::getUserText
2379          */
2380         public function getUserText( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2381                 return $this->mPage->getUserText( $audience, $user );
2382         }
2383
2384         /**
2385          * Call to WikiPage function for backwards compatibility.
2386          * @see WikiPage::hasViewableContent
2387          */
2388         public function hasViewableContent() {
2389                 return $this->mPage->hasViewableContent();
2390         }
2391
2392         /**
2393          * Call to WikiPage function for backwards compatibility.
2394          * @see WikiPage::insertOn
2395          */
2396         public function insertOn( $dbw, $pageId = null ) {
2397                 return $this->mPage->insertOn( $dbw, $pageId );
2398         }
2399
2400         /**
2401          * Call to WikiPage function for backwards compatibility.
2402          * @see WikiPage::insertProtectNullRevision
2403          */
2404         public function insertProtectNullRevision( $revCommentMsg, array $limit,
2405                 array $expiry, $cascade, $reason, $user = null
2406         ) {
2407                 return $this->mPage->insertProtectNullRevision( $revCommentMsg, $limit,
2408                         $expiry, $cascade, $reason, $user
2409                 );
2410         }
2411
2412         /**
2413          * Call to WikiPage function for backwards compatibility.
2414          * @see WikiPage::insertRedirect
2415          */
2416         public function insertRedirect() {
2417                 return $this->mPage->insertRedirect();
2418         }
2419
2420         /**
2421          * Call to WikiPage function for backwards compatibility.
2422          * @see WikiPage::insertRedirectEntry
2423          */
2424         public function insertRedirectEntry( Title $rt, $oldLatest = null ) {
2425                 return $this->mPage->insertRedirectEntry( $rt, $oldLatest );
2426         }
2427
2428         /**
2429          * Call to WikiPage function for backwards compatibility.
2430          * @see WikiPage::isCountable
2431          */
2432         public function isCountable( $editInfo = false ) {
2433                 return $this->mPage->isCountable( $editInfo );
2434         }
2435
2436         /**
2437          * Call to WikiPage function for backwards compatibility.
2438          * @see WikiPage::isRedirect
2439          */
2440         public function isRedirect() {
2441                 return $this->mPage->isRedirect();
2442         }
2443
2444         /**
2445          * Call to WikiPage function for backwards compatibility.
2446          * @see WikiPage::loadFromRow
2447          */
2448         public function loadFromRow( $data, $from ) {
2449                 return $this->mPage->loadFromRow( $data, $from );
2450         }
2451
2452         /**
2453          * Call to WikiPage function for backwards compatibility.
2454          * @see WikiPage::loadPageData
2455          */
2456         public function loadPageData( $from = 'fromdb' ) {
2457                 $this->mPage->loadPageData( $from );
2458         }
2459
2460         /**
2461          * Call to WikiPage function for backwards compatibility.
2462          * @see WikiPage::lockAndGetLatest
2463          */
2464         public function lockAndGetLatest() {
2465                 return $this->mPage->lockAndGetLatest();
2466         }
2467
2468         /**
2469          * Call to WikiPage function for backwards compatibility.
2470          * @see WikiPage::makeParserOptions
2471          */
2472         public function makeParserOptions( $context ) {
2473                 return $this->mPage->makeParserOptions( $context );
2474         }
2475
2476         /**
2477          * Call to WikiPage function for backwards compatibility.
2478          * @see WikiPage::pageDataFromId
2479          */
2480         public function pageDataFromId( $dbr, $id, $options = [] ) {
2481                 return $this->mPage->pageDataFromId( $dbr, $id, $options );
2482         }
2483
2484         /**
2485          * Call to WikiPage function for backwards compatibility.
2486          * @see WikiPage::pageDataFromTitle
2487          */
2488         public function pageDataFromTitle( $dbr, $title, $options = [] ) {
2489                 return $this->mPage->pageDataFromTitle( $dbr, $title, $options );
2490         }
2491
2492         /**
2493          * Call to WikiPage function for backwards compatibility.
2494          * @see WikiPage::prepareContentForEdit
2495          */
2496         public function prepareContentForEdit(
2497                 Content $content, $revision = null, User $user = null,
2498                 $serialFormat = null, $useCache = true
2499         ) {
2500                 return $this->mPage->prepareContentForEdit(
2501                         $content, $revision, $user,
2502                         $serialFormat, $useCache
2503                 );
2504         }
2505
2506         /**
2507          * Call to WikiPage function for backwards compatibility.
2508          * @deprecated since 1.21, use prepareContentForEdit
2509          * @see WikiPage::prepareTextForEdit
2510          */
2511         public function prepareTextForEdit( $text, $revid = null, User $user = null ) {
2512                 return $this->mPage->prepareTextForEdit( $text, $revid, $user );
2513         }
2514
2515         /**
2516          * Call to WikiPage function for backwards compatibility.
2517          * @see WikiPage::protectDescription
2518          */
2519         public function protectDescription( array $limit, array $expiry ) {
2520                 return $this->mPage->protectDescription( $limit, $expiry );
2521         }
2522
2523         /**
2524          * Call to WikiPage function for backwards compatibility.
2525          * @see WikiPage::protectDescriptionLog
2526          */
2527         public function protectDescriptionLog( array $limit, array $expiry ) {
2528                 return $this->mPage->protectDescriptionLog( $limit, $expiry );
2529         }
2530
2531         /**
2532          * Call to WikiPage function for backwards compatibility.
2533          * @see WikiPage::replaceSectionAtRev
2534          */
2535         public function replaceSectionAtRev( $sectionId, Content $sectionContent,
2536                 $sectionTitle = '', $baseRevId = null
2537         ) {
2538                 return $this->mPage->replaceSectionAtRev( $sectionId, $sectionContent,
2539                         $sectionTitle, $baseRevId
2540                 );
2541         }
2542
2543         /**
2544          * Call to WikiPage function for backwards compatibility.
2545          * @see WikiPage::replaceSectionContent
2546          */
2547         public function replaceSectionContent(
2548                 $sectionId, Content $sectionContent, $sectionTitle = '', $edittime = null
2549         ) {
2550                 return $this->mPage->replaceSectionContent(
2551                         $sectionId, $sectionContent, $sectionTitle, $edittime
2552                 );
2553         }
2554
2555         /**
2556          * Call to WikiPage function for backwards compatibility.
2557          * @see WikiPage::setTimestamp
2558          */
2559         public function setTimestamp( $ts ) {
2560                 return $this->mPage->setTimestamp( $ts );
2561         }
2562
2563         /**
2564          * Call to WikiPage function for backwards compatibility.
2565          * @see WikiPage::shouldCheckParserCache
2566          */
2567         public function shouldCheckParserCache( ParserOptions $parserOptions, $oldId ) {
2568                 return $this->mPage->shouldCheckParserCache( $parserOptions, $oldId );
2569         }
2570
2571         /**
2572          * Call to WikiPage function for backwards compatibility.
2573          * @see WikiPage::supportsSections
2574          */
2575         public function supportsSections() {
2576                 return $this->mPage->supportsSections();
2577         }
2578
2579         /**
2580          * Call to WikiPage function for backwards compatibility.
2581          * @see WikiPage::triggerOpportunisticLinksUpdate
2582          */
2583         public function triggerOpportunisticLinksUpdate( ParserOutput $parserOutput ) {
2584                 return $this->mPage->triggerOpportunisticLinksUpdate( $parserOutput );
2585         }
2586
2587         /**
2588          * Call to WikiPage function for backwards compatibility.
2589          * @see WikiPage::updateCategoryCounts
2590          */
2591         public function updateCategoryCounts( array $added, array $deleted, $id = 0 ) {
2592                 return $this->mPage->updateCategoryCounts( $added, $deleted, $id );
2593         }
2594
2595         /**
2596          * Call to WikiPage function for backwards compatibility.
2597          * @see WikiPage::updateIfNewerOn
2598          */
2599         public function updateIfNewerOn( $dbw, $revision ) {
2600                 return $this->mPage->updateIfNewerOn( $dbw, $revision );
2601         }
2602
2603         /**
2604          * Call to WikiPage function for backwards compatibility.
2605          * @see WikiPage::updateRedirectOn
2606          */
2607         public function updateRedirectOn( $dbw, $redirectTitle, $lastRevIsRedirect = null ) {
2608                 return $this->mPage->updateRedirectOn( $dbw, $redirectTitle, $lastRevIsRedirect = null );
2609         }
2610
2611         /**
2612          * Call to WikiPage function for backwards compatibility.
2613          * @see WikiPage::updateRevisionOn
2614          */
2615         public function updateRevisionOn( $dbw, $revision, $lastRevision = null,
2616                 $lastRevIsRedirect = null
2617         ) {
2618                 return $this->mPage->updateRevisionOn( $dbw, $revision, $lastRevision,
2619                         $lastRevIsRedirect
2620                 );
2621         }
2622
2623         /**
2624          * @param array $limit
2625          * @param array $expiry
2626          * @param bool $cascade
2627          * @param string $reason
2628          * @param User $user
2629          * @return Status
2630          */
2631         public function doUpdateRestrictions( array $limit, array $expiry, &$cascade,
2632                 $reason, User $user
2633         ) {
2634                 return $this->mPage->doUpdateRestrictions( $limit, $expiry, $cascade, $reason, $user );
2635         }
2636
2637         /**
2638          * @param array $limit
2639          * @param string $reason
2640          * @param int $cascade
2641          * @param array $expiry
2642          * @return bool
2643          */
2644         public function updateRestrictions( $limit = [], $reason = '',
2645                 &$cascade = 0, $expiry = []
2646         ) {
2647                 return $this->mPage->doUpdateRestrictions(
2648                         $limit,
2649                         $expiry,
2650                         $cascade,
2651                         $reason,
2652                         $this->getContext()->getUser()
2653                 );
2654         }
2655
2656         /**
2657          * @param string $reason
2658          * @param bool $suppress
2659          * @param int $u1 Unused
2660          * @param bool $u2 Unused
2661          * @param string $error
2662          * @return bool
2663          */
2664         public function doDeleteArticle(
2665                 $reason, $suppress = false, $u1 = null, $u2 = null, &$error = ''
2666         ) {
2667                 return $this->mPage->doDeleteArticle( $reason, $suppress, $u1, $u2, $error );
2668         }
2669
2670         /**
2671          * @param string $fromP
2672          * @param string $summary
2673          * @param string $token
2674          * @param bool $bot
2675          * @param array $resultDetails
2676          * @param User|null $user
2677          * @return array
2678          */
2679         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails, User $user = null ) {
2680                 $user = is_null( $user ) ? $this->getContext()->getUser() : $user;
2681                 return $this->mPage->doRollback( $fromP, $summary, $token, $bot, $resultDetails, $user );
2682         }
2683
2684         /**
2685          * @param string $fromP
2686          * @param string $summary
2687          * @param bool $bot
2688          * @param array $resultDetails
2689          * @param User|null $guser
2690          * @return array
2691          */
2692         public function commitRollback( $fromP, $summary, $bot, &$resultDetails, User $guser = null ) {
2693                 $guser = is_null( $guser ) ? $this->getContext()->getUser() : $guser;
2694                 return $this->mPage->commitRollback( $fromP, $summary, $bot, $resultDetails, $guser );
2695         }
2696
2697         /**
2698          * @param bool $hasHistory
2699          * @return mixed
2700          */
2701         public function generateReason( &$hasHistory ) {
2702                 $title = $this->mPage->getTitle();
2703                 $handler = ContentHandler::getForTitle( $title );
2704                 return $handler->getAutoDeleteReason( $title, $hasHistory );
2705         }
2706
2707         /**
2708          * @return array
2709          *
2710          * @deprecated since 1.24, use WikiPage::selectFields() instead
2711          */
2712         public static function selectFields() {
2713                 wfDeprecated( __METHOD__, '1.24' );
2714                 return WikiPage::selectFields();
2715         }
2716
2717         /**
2718          * @param Title $title
2719          *
2720          * @deprecated since 1.24, use WikiPage::onArticleCreate() instead
2721          */
2722         public static function onArticleCreate( $title ) {
2723                 wfDeprecated( __METHOD__, '1.24' );
2724                 WikiPage::onArticleCreate( $title );
2725         }
2726
2727         /**
2728          * @param Title $title
2729          *
2730          * @deprecated since 1.24, use WikiPage::onArticleDelete() instead
2731          */
2732         public static function onArticleDelete( $title ) {
2733                 wfDeprecated( __METHOD__, '1.24' );
2734                 WikiPage::onArticleDelete( $title );
2735         }
2736
2737         /**
2738          * @param Title $title
2739          *
2740          * @deprecated since 1.24, use WikiPage::onArticleEdit() instead
2741          */
2742         public static function onArticleEdit( $title ) {
2743                 wfDeprecated( __METHOD__, '1.24' );
2744                 WikiPage::onArticleEdit( $title );
2745         }
2746
2747         /**
2748          * @param string $oldtext
2749          * @param string $newtext
2750          * @param int $flags
2751          * @return string
2752          * @deprecated since 1.21, use ContentHandler::getAutosummary() instead
2753          */
2754         public static function getAutosummary( $oldtext, $newtext, $flags ) {
2755                 return WikiPage::getAutosummary( $oldtext, $newtext, $flags );
2756         }
2757         // ******
2758 }