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