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