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 use MediaWiki\MediaWikiServices;
  23
  24 /**
  25  * Class for viewing MediaWiki article and history.
  26  *
  27  * This maintains WikiPage functions for backwards compatibility.
  28  *
  29  * @todo Move and rewrite code to an Action class
  30  *
  31  * See design.txt for an overview.
  32  * Note: edit user interface and cache support functions have been
  33  * moved to separate EditPage and HTMLFileCache classes.
  34  */
  35 class Article implements Page {
  36         /** @var IContextSource The context this Article is executed in */
  37         protected $mContext;
  38
  39         /** @var WikiPage The WikiPage object of this instance */
  40         protected $mPage;
  41
  42         /** @var ParserOptions ParserOptions object for $wgUser articles */
  43         public $mParserOptions;
  44
  45         /**
  46          * @var string Text of the revision we are working on
  47          * @todo BC cruft
  48          */
  49         public $mContent;
  50
  51         /**
  52          * @var Content Content of the revision we are working on
  53          * @since 1.21
  54          */
  55         public $mContentObject;
  56
  57         /** @var bool Is the content ($mContent) already loaded? */
  58         public $mContentLoaded = false;
  59
  60         /** @var int|null The oldid of the article that is to be shown, 0 for the current revision */
  61         public $mOldId;
  62
  63         /** @var Title Title from which we were redirected here */
  64         public $mRedirectedFrom = null;
  65
  66         /** @var string|bool URL to redirect to or false if none */
  67         public $mRedirectUrl = false;
  68
  69         /** @var int Revision ID of revision we are working on */
  70         public $mRevIdFetched = 0;
  71
  72         /** @var Revision Revision we are working on */
  73         public $mRevision = null;
  74
  75         /** @var ParserOutput */
  76         public $mParserOutput;
  77
  78         /**
  79          * Constructor and clear the article
  80          * @param Title $title Reference to a Title object.
  81          * @param int $oldId Revision ID, null to fetch from request, zero for current
  82          */
  83         public function __construct( Title $title, $oldId = null ) {
  84                 $this->mOldId = $oldId;
  85                 $this->mPage = $this->newPage( $title );
  86         }
  87
  88         /**
  89          * @param Title $title
  90          * @return WikiPage
  91          */
  92         protected function newPage( Title $title ) {
  93                 return new WikiPage( $title );
  94         }
  95
  96         /**
  97          * Constructor from a page id
  98          * @param int $id Article ID to load
  99          * @return Article|null
 100          */
 101         public static function newFromID( $id ) {
 102                 $t = Title::newFromID( $id );
 103                 return $t == null ? null : new static( $t );
 104         }
 105
 106         /**
 107          * Create an Article object of the appropriate class for the given page.
 108          *
 109          * @param Title $title
 110          * @param IContextSource $context
 111          * @return Article
 112          */
 113         public static function newFromTitle( $title, IContextSource $context ) {
 114                 if ( NS_MEDIA == $title->getNamespace() ) {
 115                         // FIXME: where should this go?
 116                         $title = Title::makeTitle( NS_FILE, $title->getDBkey() );
 117                 }
 118
 119                 $page = null;
 120                 Hooks::run( 'ArticleFromTitle', [ &$title, &$page, $context ] );
 121                 if ( !$page ) {
 122                         switch ( $title->getNamespace() ) {
 123                                 case NS_FILE:
 124                                         $page = new ImagePage( $title );
 125                                         break;
 126                                 case NS_CATEGORY:
 127                                         $page = new CategoryPage( $title );
 128                                         break;
 129                                 default:
 130                                         $page = new Article( $title );
 131                         }
 132                 }
 133                 $page->setContext( $context );
 134
 135                 return $page;
 136         }
 137
 138         /**
 139          * Create an Article object of the appropriate class for the given page.
 140          *
 141          * @param WikiPage $page
 142          * @param IContextSource $context
 143          * @return Article
 144          */
 145         public static function newFromWikiPage( WikiPage $page, IContextSource $context ) {
 146                 $article = self::newFromTitle( $page->getTitle(), $context );
 147                 $article->mPage = $page; // override to keep process cached vars
 148                 return $article;
 149         }
 150
 151         /**
 152          * Get the page this view was redirected from
 153          * @return Title|null
 154          * @since 1.28
 155          */
 156         public function getRedirectedFrom() {
 157                 return $this->mRedirectedFrom;
 158         }
 159
 160         /**
 161          * Tell the page view functions that this view was redirected
 162          * from another page on the wiki.
 163          * @param Title $from
 164          */
 165         public function setRedirectedFrom( Title $from ) {
 166                 $this->mRedirectedFrom = $from;
 167         }
 168
 169         /**
 170          * Get the title object of the article
 171          *
 172          * @return Title Title object of this page
 173          */
 174         public function getTitle() {
 175                 return $this->mPage->getTitle();
 176         }
 177
 178         /**
 179          * Get the WikiPage object of this instance
 180          *
 181          * @since 1.19
 182          * @return WikiPage
 183          */
 184         public function getPage() {
 185                 return $this->mPage;
 186         }
 187
 188         /**
 189          * Clear the object
 190          */
 191         public function clear() {
 192                 $this->mContentLoaded = false;
 193
 194                 $this->mRedirectedFrom = null; # Title object if set
 195                 $this->mRevIdFetched = 0;
 196                 $this->mRedirectUrl = false;
 197
 198                 $this->mPage->clear();
 199         }
 200
 201         /**
 202          * Returns a Content object representing the pages effective display content,
 203          * not necessarily the revision's content!
 204          *
 205          * Note that getContent does not follow redirects anymore.
 206          * If you need to fetch redirectable content easily, try
 207          * the shortcut in WikiPage::getRedirectTarget()
 208          *
 209          * This function has side effects! Do not use this function if you
 210          * only want the real revision text if any.
 211          *
 212          * @return Content Return the content of this revision
 213          *
 214          * @since 1.21
 215          */
 216         protected function getContentObject() {
 217
 218                 if ( $this->mPage->getId() === 0 ) {
 219                         # If this is a MediaWiki:x message, then load the messages
 220                         # and return the message value for x.
 221                         if ( $this->getTitle()->getNamespace() == NS_MEDIAWIKI ) {
 222                                 $text = $this->getTitle()->getDefaultMessageText();
 223                                 if ( $text === false ) {
 224                                         $text = '';
 225                                 }
 226
 227                                 $content = ContentHandler::makeContent( $text, $this->getTitle() );
 228                         } else {
 229                                 $message = $this->getContext()->getUser()->isLoggedIn() ? 'noarticletext' : 'noarticletextanon';
 230                                 $content = new MessageContent( $message, null, 'parsemag' );
 231                         }
 232                 } else {
 233                         $this->fetchContentObject();
 234                         $content = $this->mContentObject;
 235                 }
 236
 237                 return $content;
 238         }
 239
 240         /**
 241          * @return int The oldid of the article that is to be shown, 0 for the current revision
 242          */
 243         public function getOldID() {
 244                 if ( is_null( $this->mOldId ) ) {
 245                         $this->mOldId = $this->getOldIDFromRequest();
 246                 }
 247
 248                 return $this->mOldId;
 249         }
 250
 251         /**
 252          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 253          *
 254          * @return int The old id for the request
 255          */
 256         public function getOldIDFromRequest() {
 257                 $this->mRedirectUrl = false;
 258
 259                 $request = $this->getContext()->getRequest();
 260                 $oldid = $request->getIntOrNull( 'oldid' );
 261
 262                 if ( $oldid === null ) {
 263                         return 0;
 264                 }
 265
 266                 if ( $oldid !== 0 ) {
 267                         # Load the given revision and check whether the page is another one.
 268                         # In that case, update this instance to reflect the change.
 269                         if ( $oldid === $this->mPage->getLatest() ) {
 270                                 $this->mRevision = $this->mPage->getRevision();
 271                         } else {
 272                                 $this->mRevision = Revision::newFromId( $oldid );
 273                                 if ( $this->mRevision !== null ) {
 274                                         // Revision title doesn't match the page title given?
 275                                         if ( $this->mPage->getId() != $this->mRevision->getPage() ) {
 276                                                 $function = [ get_class( $this->mPage ), 'newFromID' ];
 277                                                 $this->mPage = call_user_func( $function, $this->mRevision->getPage() );
 278                                         }
 279                                 }
 280                         }
 281                 }
 282
 283                 if ( $request->getVal( 'direction' ) == 'next' ) {
 284                         $nextid = $this->getTitle()->getNextRevisionID( $oldid );
 285                         if ( $nextid ) {
 286                                 $oldid = $nextid;
 287                                 $this->mRevision = null;
 288                         } else {
 289                                 $this->mRedirectUrl = $this->getTitle()->getFullURL( 'redirect=no' );
 290                         }
 291                 } elseif ( $request->getVal( 'direction' ) == 'prev' ) {
 292                         $previd = $this->getTitle()->getPreviousRevisionID( $oldid );
 293                         if ( $previd ) {
 294                                 $oldid = $previd;
 295                                 $this->mRevision = null;
 296                         }
 297                 }
 298
 299                 return $oldid;
 300         }
 301
 302         /**
 303          * Get text content object
 304          * Does *NOT* follow redirects.
 305          * @todo When is this null?
 306          *
 307          * @note Code that wants to retrieve page content from the database should
 308          * use WikiPage::getContent().
 309          *
 310          * @return Content|null|bool
 311          *
 312          * @since 1.21
 313          */
 314         protected function fetchContentObject() {
 315                 if ( $this->mContentLoaded ) {
 316                         return $this->mContentObject;
 317                 }
 318
 319                 $this->mContentLoaded = true;
 320                 $this->mContent = null;
 321
 322                 $oldid = $this->getOldID();
 323
 324                 # Pre-fill content with error message so that if something
 325                 # fails we'll have something telling us what we intended.
 326                 // XXX: this isn't page content but a UI message. horrible.
 327                 $this->mContentObject = new MessageContent( 'missing-revision', [ $oldid ] );
 328
 329                 if ( $oldid ) {
 330                         # $this->mRevision might already be fetched by getOldIDFromRequest()
 331                         if ( !$this->mRevision ) {
 332                                 $this->mRevision = Revision::newFromId( $oldid );
 333                                 if ( !$this->mRevision ) {
 334                                         wfDebug( __METHOD__ . " failed to retrieve specified revision, id $oldid\n" );
 335                                         return false;
 336                                 }
 337                         }
 338                 } else {
 339                         $oldid = $this->mPage->getLatest();
 340                         if ( !$oldid ) {
 341                                 wfDebug( __METHOD__ . " failed to find page data for title " .
 342                                         $this->getTitle()->getPrefixedText() . "\n" );
 343                                 return false;
 344                         }
 345
 346                         # Update error message with correct oldid
 347                         $this->mContentObject = new MessageContent( 'missing-revision', [ $oldid ] );
 348
 349                         $this->mRevision = $this->mPage->getRevision();
 350
 351                         if ( !$this->mRevision ) {
 352                                 wfDebug( __METHOD__ . " failed to retrieve current page, rev_id $oldid\n" );
 353                                 return false;
 354                         }
 355                 }
 356
 357                 // @todo FIXME: Horrible, horrible! This content-loading interface just plain sucks.
 358                 // We should instead work with the Revision object when we need it...
 359                 // Loads if user is allowed
 360                 $content = $this->mRevision->getContent(
 361                         Revision::FOR_THIS_USER,
 362                         $this->getContext()->getUser()
 363                 );
 364
 365                 if ( !$content ) {
 366                         wfDebug( __METHOD__ . " failed to retrieve content of revision " .
 367                                 $this->mRevision->getId() . "\n" );
 368                         return false;
 369                 }
 370
 371                 $this->mContentObject = $content;
 372                 $this->mRevIdFetched = $this->mRevision->getId();
 373
 374                 // Avoid PHP 7.1 warning of passing $this by reference
 375                 $articlePage = $this;
 376
 377                 Hooks::run(
 378                         'ArticleAfterFetchContentObject',
 379                         [ &$articlePage, &$this->mContentObject ]
 380                 );
 381
 382                 return $this->mContentObject;
 383         }
 384
 385         /**
 386          * Returns true if the currently-referenced revision is the current edit
 387          * to this page (and it exists).
 388          * @return bool
 389          */
 390         public function isCurrent() {
 391                 # If no oldid, this is the current version.
 392                 if ( $this->getOldID() == 0 ) {
 393                         return true;
 394                 }
 395
 396                 return $this->mPage->exists() && $this->mRevision && $this->mRevision->isCurrent();
 397         }
 398
 399         /**
 400          * Get the fetched Revision object depending on request parameters or null
 401          * on failure.
 402          *
 403          * @since 1.19
 404          * @return Revision|null
 405          */
 406         public function getRevisionFetched() {
 407                 $this->fetchContentObject();
 408
 409                 return $this->mRevision;
 410         }
 411
 412         /**
 413          * Use this to fetch the rev ID used on page views
 414          *
 415          * @return int Revision ID of last article revision
 416          */
 417         public function getRevIdFetched() {
 418                 if ( $this->mRevIdFetched ) {
 419                         return $this->mRevIdFetched;
 420                 } else {
 421                         return $this->mPage->getLatest();
 422                 }
 423         }
 424
 425         /**
 426          * This is the default action of the index.php entry point: just view the
 427          * page of the given title.
 428          */
 429         public function view() {
 430                 global $wgUseFileCache, $wgDebugToolbar;
 431
 432                 # Get variables from query string
 433                 # As side effect this will load the revision and update the title
 434                 # in a revision ID is passed in the request, so this should remain
 435                 # the first call of this method even if $oldid is used way below.
 436                 $oldid = $this->getOldID();
 437
 438                 $user = $this->getContext()->getUser();
 439                 # Another whitelist check in case getOldID() is altering the title
 440                 $permErrors = $this->getTitle()->getUserPermissionsErrors( 'read', $user );
 441                 if ( count( $permErrors ) ) {
 442                         wfDebug( __METHOD__ . ": denied on secondary read check\n" );
 443                         throw new PermissionsError( 'read', $permErrors );
 444                 }
 445
 446                 $outputPage = $this->getContext()->getOutput();
 447                 # getOldID() may as well want us to redirect somewhere else
 448                 if ( $this->mRedirectUrl ) {
 449                         $outputPage->redirect( $this->mRedirectUrl );
 450                         wfDebug( __METHOD__ . ": redirecting due to oldid\n" );
 451
 452                         return;
 453                 }
 454
 455                 # If we got diff in the query, we want to see a diff page instead of the article.
 456                 if ( $this->getContext()->getRequest()->getCheck( 'diff' ) ) {
 457                         wfDebug( __METHOD__ . ": showing diff page\n" );
 458                         $this->showDiffPage();
 459
 460                         return;
 461                 }
 462
 463                 # Set page title (may be overridden by DISPLAYTITLE)
 464                 $outputPage->setPageTitle( $this->getTitle()->getPrefixedText() );
 465
 466                 $outputPage->setArticleFlag( true );
 467                 # Allow frames by default
 468                 $outputPage->allowClickjacking();
 469
 470                 $parserCache = ParserCache::singleton();
 471
 472                 $parserOptions = $this->getParserOptions();
 473                 # Render printable version, use printable version cache
 474                 if ( $outputPage->isPrintable() ) {
 475                         $parserOptions->setIsPrintable( true );
 476                         $parserOptions->setEditSection( false );
 477                 } elseif ( !$this->isCurrent() || !$this->getTitle()->quickUserCan( 'edit', $user ) ) {
 478                         $parserOptions->setEditSection( false );
 479                 }
 480
 481                 # Try client and file cache
 482                 if ( !$wgDebugToolbar && $oldid === 0 && $this->mPage->checkTouched() ) {
 483                         # Try to stream the output from file cache
 484                         if ( $wgUseFileCache && $this->tryFileCache() ) {
 485                                 wfDebug( __METHOD__ . ": done file cache\n" );
 486                                 # tell wgOut that output is taken care of
 487                                 $outputPage->disable();
 488                                 $this->mPage->doViewUpdates( $user, $oldid );
 489
 490                                 return;
 491                         }
 492                 }
 493
 494                 # Should the parser cache be used?
 495                 $useParserCache = $this->mPage->shouldCheckParserCache( $parserOptions, $oldid );
 496                 wfDebug( 'Article::view using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
 497                 if ( $user->getStubThreshold() ) {
 498                         MediaWikiServices::getInstance()->getStatsdDataFactory()->increment( 'pcache_miss_stub' );
 499                 }
 500
 501                 $this->showRedirectedFromHeader();
 502                 $this->showNamespaceHeader();
 503
 504                 # Iterate through the possible ways of constructing the output text.
 505                 # Keep going until $outputDone is set, or we run out of things to do.
 506                 $pass = 0;
 507                 $outputDone = false;
 508                 $this->mParserOutput = false;
 509
 510                 while ( !$outputDone && ++$pass ) {
 511                         switch ( $pass ) {
 512                                 case 1:
 513                                         // Avoid PHP 7.1 warning of passing $this by reference
 514                                         $articlePage = $this;
 515                                         Hooks::run( 'ArticleViewHeader', [ &$articlePage, &$outputDone, &$useParserCache ] );
 516                                         break;
 517                                 case 2:
 518                                         # Early abort if the page doesn't exist
 519                                         if ( !$this->mPage->exists() ) {
 520                                                 wfDebug( __METHOD__ . ": showing missing article\n" );
 521                                                 $this->showMissingArticle();
 522                                                 $this->mPage->doViewUpdates( $user );
 523                                                 return;
 524                                         }
 525
 526                                         # Try the parser cache
 527                                         if ( $useParserCache ) {
 528                                                 $this->mParserOutput = $parserCache->get( $this->mPage, $parserOptions );
 529
 530                                                 if ( $this->mParserOutput !== false ) {
 531                                                         if ( $oldid ) {
 532                                                                 wfDebug( __METHOD__ . ": showing parser cache contents for current rev permalink\n" );
 533                                                                 $this->setOldSubtitle( $oldid );
 534                                                         } else {
 535                                                                 wfDebug( __METHOD__ . ": showing parser cache contents\n" );
 536                                                         }
 537                                                         $outputPage->addParserOutput( $this->mParserOutput );
 538                                                         # Ensure that UI elements requiring revision ID have
 539                                                         # the correct version information.
 540                                                         $outputPage->setRevisionId( $this->mPage->getLatest() );
 541                                                         # Preload timestamp to avoid a DB hit
 542                                                         $cachedTimestamp = $this->mParserOutput->getTimestamp();
 543                                                         if ( $cachedTimestamp !== null ) {
 544                                                                 $outputPage->setRevisionTimestamp( $cachedTimestamp );
 545                                                                 $this->mPage->setTimestamp( $cachedTimestamp );
 546                                                         }
 547                                                         $outputDone = true;
 548                                                 }
 549                                         }
 550                                         break;
 551                                 case 3:
 552                                         # This will set $this->mRevision if needed
 553                                         $this->fetchContentObject();
 554
 555                                         # Are we looking at an old revision
 556                                         if ( $oldid && $this->mRevision ) {
 557                                                 $this->setOldSubtitle( $oldid );
 558
 559                                                 if ( !$this->showDeletedRevisionHeader() ) {
 560                                                         wfDebug( __METHOD__ . ": cannot view deleted revision\n" );
 561                                                         return;
 562                                                 }
 563                                         }
 564
 565                                         # Ensure that UI elements requiring revision ID have
 566                                         # the correct version information.
 567                                         $outputPage->setRevisionId( $this->getRevIdFetched() );
 568                                         # Preload timestamp to avoid a DB hit
 569                                         $outputPage->setRevisionTimestamp( $this->mPage->getTimestamp() );
 570
 571                                         if ( !Hooks::run( 'ArticleContentViewCustom',
 572                                                         [ $this->fetchContentObject(), $this->getTitle(), $outputPage ] ) ) {
 573
 574                                                 # Allow extensions do their own custom view for certain pages
 575                                                 $outputDone = true;
 576                                         }
 577                                         break;
 578                                 case 4:
 579                                         # Run the parse, protected by a pool counter
 580                                         wfDebug( __METHOD__ . ": doing uncached parse\n" );
 581
 582                                         $content = $this->getContentObject();
 583                                         $poolArticleView = new PoolWorkArticleView( $this->getPage(), $parserOptions,
 584                                                 $this->getRevIdFetched(), $useParserCache, $content );
 585
 586                                         if ( !$poolArticleView->execute() ) {
 587                                                 $error = $poolArticleView->getError();
 588                                                 if ( $error ) {
 589                                                         $outputPage->clearHTML(); // for release() errors
 590                                                         $outputPage->enableClientCache( false );
 591                                                         $outputPage->setRobotPolicy( 'noindex,nofollow' );
 592
 593                                                         $errortext = $error->getWikiText( false, 'view-pool-error' );
 594                                                         $outputPage->addWikiText( '<div class="errorbox">' . $errortext . '</div>' );
 595                                                 }
 596                                                 # Connection or timeout error
 597                                                 return;
 598                                         }
 599
 600                                         $this->mParserOutput = $poolArticleView->getParserOutput();
 601                                         $outputPage->addParserOutput( $this->mParserOutput );
 602                                         if ( $content->getRedirectTarget() ) {
 603                                                 $outputPage->addSubtitle( "<span id=\"redirectsub\">" .
 604                                                         $this->getContext()->msg( 'redirectpagesub' )->parse() . "</span>" );
 605                                         }
 606
 607                                         # Don't cache a dirty ParserOutput object
 608                                         if ( $poolArticleView->getIsDirty() ) {
 609                                                 $outputPage->setCdnMaxage( 0 );
 610                                                 $outputPage->addHTML( "<!-- parser cache is expired, " .
 611                                                         "sending anyway due to pool overload-->\n" );
 612                                         }
 613
 614                                         $outputDone = true;
 615                                         break;
 616                                 # Should be unreachable, but just in case...
 617                                 default:
 618                                         break 2;
 619                         }
 620                 }
 621
 622                 # Get the ParserOutput actually *displayed* here.
 623                 # Note that $this->mParserOutput is the *current*/oldid version output.
 624                 $pOutput = ( $outputDone instanceof ParserOutput )
 625                         ? $outputDone // object fetched by hook
 626                         : $this->mParserOutput;
 627
 628                 # Adjust title for main page & pages with displaytitle
 629                 if ( $pOutput ) {
 630                         $this->adjustDisplayTitle( $pOutput );
 631                 }
 632
 633                 # For the main page, overwrite the <title> element with the con-
 634                 # tents of 'pagetitle-view-mainpage' instead of the default (if
 635                 # that's not empty).
 636                 # This message always exists because it is in the i18n files
 637                 if ( $this->getTitle()->isMainPage() ) {
 638                         $msg = wfMessage( 'pagetitle-view-mainpage' )->inContentLanguage();
 639                         if ( !$msg->isDisabled() ) {
 640                                 $outputPage->setHTMLTitle( $msg->title( $this->getTitle() )->text() );
 641                         }
 642                 }
 643
 644                 # Use adaptive TTLs for CDN so delayed/failed purges are noticed less often.
 645                 # This could use getTouched(), but that could be scary for major template edits.
 646                 $outputPage->adaptCdnTTL( $this->mPage->getTimestamp(), IExpiringStore::TTL_DAY );
 647
 648                 # Check for any __NOINDEX__ tags on the page using $pOutput
 649                 $policy = $this->getRobotPolicy( 'view', $pOutput );
 650                 $outputPage->setIndexPolicy( $policy['index'] );
 651                 $outputPage->setFollowPolicy( $policy['follow'] );
 652
 653                 $this->showViewFooter();
 654                 $this->mPage->doViewUpdates( $user, $oldid );
 655
 656                 # Load the postEdit module if the user just saved this revision
 657                 # See also EditPage::setPostEditCookie
 658                 $request = $this->getContext()->getRequest();
 659                 $cookieKey = EditPage::POST_EDIT_COOKIE_KEY_PREFIX . $this->getRevIdFetched();
 660                 $postEdit = $request->getCookie( $cookieKey );
 661                 if ( $postEdit ) {
 662                         # Clear the cookie. This also prevents caching of the response.
 663                         $request->response()->clearCookie( $cookieKey );
 664                         $outputPage->addJsConfigVars( 'wgPostEdit', $postEdit );
 665                         $outputPage->addModules( 'mediawiki.action.view.postEdit' );
 666                 }
 667         }
 668
 669         /**
 670          * Adjust title for pages with displaytitle, -{T|}- or language conversion
 671          * @param ParserOutput $pOutput
 672          */
 673         public function adjustDisplayTitle( ParserOutput $pOutput ) {
 674                 # Adjust the title if it was set by displaytitle, -{T|}- or language conversion
 675                 $titleText = $pOutput->getTitleText();
 676                 if ( strval( $titleText ) !== '' ) {
 677                         $this->getContext()->getOutput()->setPageTitle( $titleText );
 678                 }
 679         }
 680
 681         /**
 682          * Show a diff page according to current request variables. For use within
 683          * Article::view() only, other callers should use the DifferenceEngine class.
 684          */
 685         protected function showDiffPage() {
 686                 $request = $this->getContext()->getRequest();
 687                 $user = $this->getContext()->getUser();
 688                 $diff = $request->getVal( 'diff' );
 689                 $rcid = $request->getVal( 'rcid' );
 690                 $diffOnly = $request->getBool( 'diffonly', $user->getOption( 'diffonly' ) );
 691                 $purge = $request->getVal( 'action' ) == 'purge';
 692                 $unhide = $request->getInt( 'unhide' ) == 1;
 693                 $oldid = $this->getOldID();
 694
 695                 $rev = $this->getRevisionFetched();
 696
 697                 if ( !$rev ) {
 698                         $this->getContext()->getOutput()->setPageTitle( wfMessage( 'errorpagetitle' ) );
 699                         $msg = $this->getContext()->msg( 'difference-missing-revision' )
 700                                 ->params( $oldid )
 701                                 ->numParams( 1 )
 702                                 ->parseAsBlock();
 703                         $this->getContext()->getOutput()->addHTML( $msg );
 704                         return;
 705                 }
 706
 707                 $contentHandler = $rev->getContentHandler();
 708                 $de = $contentHandler->createDifferenceEngine(
 709                         $this->getContext(),
 710                         $oldid,
 711                         $diff,
 712                         $rcid,
 713                         $purge,
 714                         $unhide
 715                 );
 716
 717                 // DifferenceEngine directly fetched the revision:
 718                 $this->mRevIdFetched = $de->mNewid;
 719                 $de->showDiffPage( $diffOnly );
 720
 721                 // Run view updates for the newer revision being diffed (and shown
 722                 // below the diff if not $diffOnly).
 723                 list( $old, $new ) = $de->mapDiffPrevNext( $oldid, $diff );
 724                 // New can be false, convert it to 0 - this conveniently means the latest revision
 725                 $this->mPage->doViewUpdates( $user, (int)$new );
 726         }
 727
 728         /**
 729          * Get the robot policy to be used for the current view
 730          * @param string $action The action= GET parameter
 731          * @param ParserOutput|null $pOutput
 732          * @return array The policy that should be set
 733          * @todo actions other than 'view'
 734          */
 735         public function getRobotPolicy( $action, $pOutput = null ) {
 736                 global $wgArticleRobotPolicies, $wgNamespaceRobotPolicies, $wgDefaultRobotPolicy;
 737
 738                 $ns = $this->getTitle()->getNamespace();
 739
 740                 # Don't index user and user talk pages for blocked users (T13443)
 741                 if ( ( $ns == NS_USER || $ns == NS_USER_TALK ) && !$this->getTitle()->isSubpage() ) {
 742                         $specificTarget = null;
 743                         $vagueTarget = null;
 744                         $titleText = $this->getTitle()->getText();
 745                         if ( IP::isValid( $titleText ) ) {
 746                                 $vagueTarget = $titleText;
 747                         } else {
 748                                 $specificTarget = $titleText;
 749                         }
 750                         if ( Block::newFromTarget( $specificTarget, $vagueTarget ) instanceof Block ) {
 751                                 return [
 752                                         'index' => 'noindex',
 753                                         'follow' => 'nofollow'
 754                                 ];
 755                         }
 756                 }
 757
 758                 if ( $this->mPage->getId() === 0 || $this->getOldID() ) {
 759                         # Non-articles (special pages etc), and old revisions
 760                         return [
 761                                 'index' => 'noindex',
 762                                 'follow' => 'nofollow'
 763                         ];
 764                 } elseif ( $this->getContext()->getOutput()->isPrintable() ) {
 765                         # Discourage indexing of printable versions, but encourage following
 766                         return [
 767                                 'index' => 'noindex',
 768                                 'follow' => 'follow'
 769                         ];
 770                 } elseif ( $this->getContext()->getRequest()->getInt( 'curid' ) ) {
 771                         # For ?curid=x urls, disallow indexing
 772                         return [
 773                                 'index' => 'noindex',
 774                                 'follow' => 'follow'
 775                         ];
 776                 }
 777
 778                 # Otherwise, construct the policy based on the various config variables.
 779                 $policy = self::formatRobotPolicy( $wgDefaultRobotPolicy );
 780
 781                 if ( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 782                         # Honour customised robot policies for this namespace
 783                         $policy = array_merge(
 784                                 $policy,
 785                                 self::formatRobotPolicy( $wgNamespaceRobotPolicies[$ns] )
 786                         );
 787                 }
 788                 if ( $this->getTitle()->canUseNoindex() && is_object( $pOutput ) && $pOutput->getIndexPolicy() ) {
 789                         # __INDEX__ and __NOINDEX__ magic words, if allowed. Incorporates
 790                         # a final sanity check that we have really got the parser output.
 791                         $policy = array_merge(
 792                                 $policy,
 793                                 [ 'index' => $pOutput->getIndexPolicy() ]
 794                         );
 795                 }
 796
 797                 if ( isset( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] ) ) {
 798                         # (T16900) site config can override user-defined __INDEX__ or __NOINDEX__
 799                         $policy = array_merge(
 800                                 $policy,
 801                                 self::formatRobotPolicy( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] )
 802                         );
 803                 }
 804
 805                 return $policy;
 806         }
 807
 808         /**
 809          * Converts a String robot policy into an associative array, to allow
 810          * merging of several policies using array_merge().
 811          * @param array|string $policy Returns empty array on null/false/'', transparent
 812          *   to already-converted arrays, converts string.
 813          * @return array 'index' => \<indexpolicy\>, 'follow' => \<followpolicy\>
 814          */
 815         public static function formatRobotPolicy( $policy ) {
 816                 if ( is_array( $policy ) ) {
 817                         return $policy;
 818                 } elseif ( !$policy ) {
 819                         return [];
 820                 }
 821
 822                 $policy = explode( ',', $policy );
 823                 $policy = array_map( 'trim', $policy );
 824
 825                 $arr = [];
 826                 foreach ( $policy as $var ) {
 827                         if ( in_array( $var, [ 'index', 'noindex' ] ) ) {
 828                                 $arr['index'] = $var;
 829                         } elseif ( in_array( $var, [ 'follow', 'nofollow' ] ) ) {
 830                                 $arr['follow'] = $var;
 831                         }
 832                 }
 833
 834                 return $arr;
 835         }
 836
 837         /**
 838          * If this request is a redirect view, send "redirected from" subtitle to
 839          * the output. Returns true if the header was needed, false if this is not
 840          * a redirect view. Handles both local and remote redirects.
 841          *
 842          * @return bool
 843          */
 844         public function showRedirectedFromHeader() {
 845                 global $wgRedirectSources;
 846
 847                 $context = $this->getContext();
 848                 $outputPage = $context->getOutput();
 849                 $request = $context->getRequest();
 850                 $rdfrom = $request->getVal( 'rdfrom' );
 851
 852                 // Construct a URL for the current page view, but with the target title
 853                 $query = $request->getValues();
 854                 unset( $query['rdfrom'] );
 855                 unset( $query['title'] );
 856                 if ( $this->getTitle()->isRedirect() ) {
 857                         // Prevent double redirects
 858                         $query['redirect'] = 'no';
 859                 }
 860                 $redirectTargetUrl = $this->getTitle()->getLinkURL( $query );
 861
 862                 if ( isset( $this->mRedirectedFrom ) ) {
 863                         // Avoid PHP 7.1 warning of passing $this by reference
 864                         $articlePage = $this;
 865
 866                         // This is an internally redirected page view.
 867                         // We'll need a backlink to the source page for navigation.
 868                         if ( Hooks::run( 'ArticleViewRedirect', [ &$articlePage ] ) ) {
 869                                 $redir = Linker::linkKnown(
 870                                         $this->mRedirectedFrom,
 871                                         null,
 872                                         [],
 873                                         [ 'redirect' => 'no' ]
 874                                 );
 875
 876                                 $outputPage->addSubtitle( "<span class=\"mw-redirectedfrom\">" .
 877                                         $context->msg( 'redirectedfrom' )->rawParams( $redir )->parse()
 878                                 . "</span>" );
 879
 880                                 // Add the script to update the displayed URL and
 881                                 // set the fragment if one was specified in the redirect
 882                                 $outputPage->addJsConfigVars( [
 883                                         'wgInternalRedirectTargetUrl' => $redirectTargetUrl,
 884                                 ] );
 885                                 $outputPage->addModules( 'mediawiki.action.view.redirect' );
 886
 887                                 // Add a <link rel="canonical"> tag
 888                                 $outputPage->setCanonicalUrl( $this->getTitle()->getCanonicalURL() );
 889
 890                                 // Tell the output object that the user arrived at this article through a redirect
 891                                 $outputPage->setRedirectedFrom( $this->mRedirectedFrom );
 892
 893                                 return true;
 894                         }
 895                 } elseif ( $rdfrom ) {
 896                         // This is an externally redirected view, from some other wiki.
 897                         // If it was reported from a trusted site, supply a backlink.
 898                         if ( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 899                                 $redir = Linker::makeExternalLink( $rdfrom, $rdfrom );
 900                                 $outputPage->addSubtitle( "<span class=\"mw-redirectedfrom\">" .
 901                                         $context->msg( 'redirectedfrom' )->rawParams( $redir )->parse()
 902                                 . "</span>" );
 903
 904                                 // Add the script to update the displayed URL
 905                                 $outputPage->addJsConfigVars( [
 906                                         'wgInternalRedirectTargetUrl' => $redirectTargetUrl,
 907                                 ] );
 908                                 $outputPage->addModules( 'mediawiki.action.view.redirect' );
 909
 910                                 return true;
 911                         }
 912                 }
 913
 914                 return false;
 915         }
 916
 917         /**
 918          * Show a header specific to the namespace currently being viewed, like
 919          * [[MediaWiki:Talkpagetext]]. For Article::view().
 920          */
 921         public function showNamespaceHeader() {
 922                 if ( $this->getTitle()->isTalkPage() ) {
 923                         if ( !wfMessage( 'talkpageheader' )->isDisabled() ) {
 924                                 $this->getContext()->getOutput()->wrapWikiMsg(
 925                                         "<div class=\"mw-talkpageheader\">\n$1\n</div>",
 926                                         [ 'talkpageheader' ]
 927                                 );
 928                         }
 929                 }
 930         }
 931
 932         /**
 933          * Show the footer section of an ordinary page view
 934          */
 935         public function showViewFooter() {
 936                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 937                 if ( $this->getTitle()->getNamespace() == NS_USER_TALK
 938                         && IP::isValid( $this->getTitle()->getText() )
 939                 ) {
 940                         $this->getContext()->getOutput()->addWikiMsg( 'anontalkpagetext' );
 941                 }
 942
 943                 // Show a footer allowing the user to patrol the shown revision or page if possible
 944                 $patrolFooterShown = $this->showPatrolFooter();
 945
 946                 Hooks::run( 'ArticleViewFooter', [ $this, $patrolFooterShown ] );
 947         }
 948
 949         /**
 950          * If patrol is possible, output a patrol UI box. This is called from the
 951          * footer section of ordinary page views. If patrol is not possible or not
 952          * desired, does nothing.
 953          * Side effect: When the patrol link is build, this method will call
 954          * OutputPage::preventClickjacking() and load mediawiki.page.patrol.ajax.
 955          *
 956          * @return bool
 957          */
 958         public function showPatrolFooter() {
 959                 global $wgUseNPPatrol, $wgUseRCPatrol, $wgUseFilePatrol, $wgEnableAPI, $wgEnableWriteAPI;
 960
 961                 $outputPage = $this->getContext()->getOutput();
 962                 $user = $this->getContext()->getUser();
 963                 $title = $this->getTitle();
 964                 $rc = false;
 965
 966                 if ( !$title->quickUserCan( 'patrol', $user )
 967                         || !( $wgUseRCPatrol || $wgUseNPPatrol
 968                                 || ( $wgUseFilePatrol && $title->inNamespace( NS_FILE ) ) )
 969                 ) {
 970                         // Patrolling is disabled or the user isn't allowed to
 971                         return false;
 972                 }
 973
 974                 if ( $this->mRevision
 975                         && !RecentChange::isInRCLifespan( $this->mRevision->getTimestamp(), 21600 )
 976                 ) {
 977                         // The current revision is already older than what could be in the RC table
 978                         // 6h tolerance because the RC might not be cleaned out regularly
 979                         return false;
 980                 }
 981
 982                 // Check for cached results
 983                 $key = wfMemcKey( 'unpatrollable-page', $title->getArticleID() );
 984                 $cache = ObjectCache::getMainWANInstance();
 985                 if ( $cache->get( $key ) ) {
 986                         return false;
 987                 }
 988
 989                 $dbr = wfGetDB( DB_REPLICA );
 990                 $oldestRevisionTimestamp = $dbr->selectField(
 991                         'revision',
 992                         'MIN( rev_timestamp )',
 993                         [ 'rev_page' => $title->getArticleID() ],
 994                         __METHOD__
 995                 );
 996
 997                 // New page patrol: Get the timestamp of the oldest revison which
 998                 // the revision table holds for the given page. Then we look
 999                 // whether it's within the RC lifespan and if it is, we try
1000                 // to get the recentchanges row belonging to that entry
1001                 // (with rc_new = 1).
1002                 $recentPageCreation = false;
1003                 if ( $oldestRevisionTimestamp
1004                         && RecentChange::isInRCLifespan( $oldestRevisionTimestamp, 21600 )
1005                 ) {
1006                         // 6h tolerance because the RC might not be cleaned out regularly
1007                         $recentPageCreation = true;
1008                         $rc = RecentChange::newFromConds(
1009                                 [
1010                                         'rc_new' => 1,
1011                                         'rc_timestamp' => $oldestRevisionTimestamp,
1012                                         'rc_namespace' => $title->getNamespace(),
1013                                         'rc_cur_id' => $title->getArticleID()
1014                                 ],
1015                                 __METHOD__
1016                         );
1017                         if ( $rc ) {
1018                                 // Use generic patrol message for new pages
1019                                 $markPatrolledMsg = wfMessage( 'markaspatrolledtext' );
1020                         }
1021                 }
1022
1023                 // File patrol: Get the timestamp of the latest upload for this page,
1024                 // check whether it is within the RC lifespan and if it is, we try
1025                 // to get the recentchanges row belonging to that entry
1026                 // (with rc_type = RC_LOG, rc_log_type = upload).
1027                 $recentFileUpload = false;
1028                 if ( ( !$rc || $rc->getAttribute( 'rc_patrolled' ) ) && $wgUseFilePatrol
1029                         && $title->getNamespace() === NS_FILE ) {
1030                         // Retrieve timestamp of most recent upload
1031                         $newestUploadTimestamp = $dbr->selectField(
1032                                 'image',
1033                                 'MAX( img_timestamp )',
1034                                 [ 'img_name' => $title->getDBkey() ],
1035                                 __METHOD__
1036                         );
1037                         if ( $newestUploadTimestamp
1038                                 && RecentChange::isInRCLifespan( $newestUploadTimestamp, 21600 )
1039                         ) {
1040                                 // 6h tolerance because the RC might not be cleaned out regularly
1041                                 $recentFileUpload = true;
1042                                 $rc = RecentChange::newFromConds(
1043                                         [
1044                                                 'rc_type' => RC_LOG,
1045                                                 'rc_log_type' => 'upload',
1046                                                 'rc_timestamp' => $newestUploadTimestamp,
1047                                                 'rc_namespace' => NS_FILE,
1048                                                 'rc_cur_id' => $title->getArticleID()
1049                                         ],
1050                                         __METHOD__,
1051                                         [ 'USE INDEX' => 'rc_timestamp' ]
1052                                 );
1053                                 if ( $rc ) {
1054                                         // Use patrol message specific to files
1055                                         $markPatrolledMsg = wfMessage( 'markaspatrolledtext-file' );
1056                                 }
1057                         }
1058                 }
1059
1060                 if ( !$recentPageCreation && !$recentFileUpload ) {
1061                         // Page creation and latest upload (for files) is too old to be in RC
1062
1063                         // We definitely can't patrol so cache the information
1064                         // When a new file version is uploaded, the cache is cleared
1065                         $cache->set( $key, '1' );
1066
1067                         return false;
1068                 }
1069
1070                 if ( !$rc ) {
1071                         // Don't cache: This can be hit if the page gets accessed very fast after
1072                         // its creation / latest upload or in case we have high replica DB lag. In case
1073                         // the revision is too old, we will already return above.
1074                         return false;
1075                 }
1076
1077                 if ( $rc->getAttribute( 'rc_patrolled' ) ) {
1078                         // Patrolled RC entry around
1079
1080                         // Cache the information we gathered above in case we can't patrol
1081                         // Don't cache in case we can patrol as this could change
1082                         $cache->set( $key, '1' );
1083
1084                         return false;
1085                 }
1086
1087                 if ( $rc->getPerformer()->equals( $user ) ) {
1088                         // Don't show a patrol link for own creations/uploads. If the user could
1089                         // patrol them, they already would be patrolled
1090                         return false;
1091                 }
1092
1093                 $outputPage->preventClickjacking();
1094                 if ( $wgEnableAPI && $wgEnableWriteAPI && $user->isAllowed( 'writeapi' ) ) {
1095                         $outputPage->addModules( 'mediawiki.page.patrol.ajax' );
1096                 }
1097
1098                 $link = Linker::linkKnown(
1099                         $title,
1100                         $markPatrolledMsg->escaped(),
1101                         [],
1102                         [
1103                                 'action' => 'markpatrolled',
1104                                 'rcid' => $rc->getAttribute( 'rc_id' ),
1105                         ]
1106                 );
1107
1108                 $outputPage->addHTML(
1109                         "<div class='patrollink' data-mw='interface'>" .
1110                                 wfMessage( 'markaspatrolledlink' )->rawParams( $link )->escaped() .
1111                         '</div>'
1112                 );
1113
1114                 return true;
1115         }
1116
1117         /**
1118          * Purge the cache used to check if it is worth showing the patrol footer
1119          * For example, it is done during re-uploads when file patrol is used.
1120          * @param int $articleID ID of the article to purge
1121          * @since 1.27
1122          */
1123         public static function purgePatrolFooterCache( $articleID ) {
1124                 $cache = ObjectCache::getMainWANInstance();
1125                 $cache->delete( wfMemcKey( 'unpatrollable-page', $articleID ) );
1126         }
1127
1128         /**
1129          * Show the error text for a missing article. For articles in the MediaWiki
1130          * namespace, show the default message text. To be called from Article::view().
1131          */
1132         public function showMissingArticle() {
1133                 global $wgSend404Code;
1134
1135                 $outputPage = $this->getContext()->getOutput();
1136                 // Whether the page is a root user page of an existing user (but not a subpage)
1137                 $validUserPage = false;
1138
1139                 $title = $this->getTitle();
1140
1141                 # Show info in user (talk) namespace. Does the user exist? Is he blocked?
1142                 if ( $title->getNamespace() == NS_USER
1143                         || $title->getNamespace() == NS_USER_TALK
1144                 ) {
1145                         $rootPart = explode( '/', $title->getText() )[0];
1146                         $user = User::newFromName( $rootPart, false /* allow IP users */ );
1147                         $ip = User::isIP( $rootPart );
1148                         $block = Block::newFromTarget( $user, $user );
1149
1150                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
1151                                 $outputPage->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n\$1\n</div>",
1152                                         [ 'userpage-userdoesnotexist-view', wfEscapeWikiText( $rootPart ) ] );
1153                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
1154                                 # Show log extract if the user is currently blocked
1155                                 LogEventsList::showLogExtract(
1156                                         $outputPage,
1157                                         'block',
1158                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
1159                                         '',
1160                                         [
1161                                                 'lim' => 1,
1162                                                 'showIfEmpty' => false,
1163                                                 'msgKey' => [
1164                                                         'blocked-notice-logextract',
1165                                                         $user->getName() # Support GENDER in notice
1166                                                 ]
1167                                         ]
1168                                 );
1169                                 $validUserPage = !$title->isSubpage();
1170                         } else {
1171                                 $validUserPage = !$title->isSubpage();
1172                         }
1173                 }
1174
1175                 Hooks::run( 'ShowMissingArticle', [ $this ] );
1176
1177                 # Show delete and move logs if there were any such events.
1178                 # The logging query can DOS the site when bots/crawlers cause 404 floods,
1179                 # so be careful showing this. 404 pages must be cheap as they are hard to cache.
1180                 $cache = ObjectCache::getMainStashInstance();
1181                 $key = wfMemcKey( 'page-recent-delete', md5( $title->getPrefixedText() ) );
1182                 $loggedIn = $this->getContext()->getUser()->isLoggedIn();
1183                 if ( $loggedIn || $cache->get( $key ) ) {
1184                         $logTypes = [ 'delete', 'move' ];
1185
1186                         $dbr = wfGetDB( DB_REPLICA );
1187
1188                         $conds = [ 'log_action != ' . $dbr->addQuotes( 'revision' ) ];
1189                         // Give extensions a chance to hide their (unrelated) log entries
1190                         Hooks::run( 'Article::MissingArticleConditions', [ &$conds, $logTypes ] );
1191                         LogEventsList::showLogExtract(
1192                                 $outputPage,
1193                                 $logTypes,
1194                                 $title,
1195                                 '',
1196                                 [
1197                                         'lim' => 10,
1198                                         'conds' => $conds,
1199                                         'showIfEmpty' => false,
1200                                         'msgKey' => [ $loggedIn
1201                                                 ? 'moveddeleted-notice'
1202                                                 : 'moveddeleted-notice-recent'
1203                                         ]
1204                                 ]
1205                         );
1206                 }
1207
1208                 if ( !$this->mPage->hasViewableContent() && $wgSend404Code && !$validUserPage ) {
1209                         // If there's no backing content, send a 404 Not Found
1210                         // for better machine handling of broken links.
1211                         $this->getContext()->getRequest()->response()->statusHeader( 404 );
1212                 }
1213
1214                 // Also apply the robot policy for nonexisting pages (even if a 404 was used for sanity)
1215                 $policy = $this->getRobotPolicy( 'view' );
1216                 $outputPage->setIndexPolicy( $policy['index'] );
1217                 $outputPage->setFollowPolicy( $policy['follow'] );
1218
1219                 $hookResult = Hooks::run( 'BeforeDisplayNoArticleText', [ $this ] );
1220
1221                 if ( !$hookResult ) {
1222                         return;
1223                 }
1224
1225                 # Show error message
1226                 $oldid = $this->getOldID();
1227                 if ( !$oldid && $title->getNamespace() === NS_MEDIAWIKI && $title->hasSourceText() ) {
1228                         $outputPage->addParserOutput( $this->getContentObject()->getParserOutput( $title ) );
1229                 } else {
1230                         if ( $oldid ) {
1231                                 $text = wfMessage( 'missing-revision', $oldid )->plain();
1232                         } elseif ( $title->quickUserCan( 'create', $this->getContext()->getUser() )
1233                                 && $title->quickUserCan( 'edit', $this->getContext()->getUser() )
1234                         ) {
1235                                 $message = $this->getContext()->getUser()->isLoggedIn() ? 'noarticletext' : 'noarticletextanon';
1236                                 $text = wfMessage( $message )->plain();
1237                         } else {
1238                                 $text = wfMessage( 'noarticletext-nopermission' )->plain();
1239                         }
1240
1241                         $dir = $this->getContext()->getLanguage()->getDir();
1242                         $lang = $this->getContext()->getLanguage()->getCode();
1243                         $outputPage->addWikiText( Xml::openElement( 'div', [
1244                                 'class' => "noarticletext mw-content-$dir",
1245                                 'dir' => $dir,
1246                                 'lang' => $lang,
1247                         ] ) . "\n$text\n</div>" );
1248                 }
1249         }
1250
1251         /**
1252          * If the revision requested for view is deleted, check permissions.
1253          * Send either an error message or a warning header to the output.
1254          *
1255          * @return bool True if the view is allowed, false if not.
1256          */
1257         public function showDeletedRevisionHeader() {
1258                 if ( !$this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1259                         // Not deleted
1260                         return true;
1261                 }
1262
1263                 $outputPage = $this->getContext()->getOutput();
1264                 $user = $this->getContext()->getUser();
1265                 // If the user is not allowed to see it...
1266                 if ( !$this->mRevision->userCan( Revision::DELETED_TEXT, $user ) ) {
1267                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1268                                 'rev-deleted-text-permission' );
1269
1270                         return false;
1271                 // If the user needs to confirm that they want to see it...
1272                 } elseif ( $this->getContext()->getRequest()->getInt( 'unhide' ) != 1 ) {
1273                         # Give explanation and add a link to view the revision...
1274                         $oldid = intval( $this->getOldID() );
1275                         $link = $this->getTitle()->getFullURL( "oldid={$oldid}&unhide=1" );
1276                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1277                                 'rev-suppressed-text-unhide' : 'rev-deleted-text-unhide';
1278                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1279                                 [ $msg, $link ] );
1280
1281                         return false;
1282                 // We are allowed to see...
1283                 } else {
1284                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1285                                 'rev-suppressed-text-view' : 'rev-deleted-text-view';
1286                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", $msg );
1287
1288                         return true;
1289                 }
1290         }
1291
1292         /**
1293          * Generate the navigation links when browsing through an article revisions
1294          * It shows the information as:
1295          *   Revision as of \<date\>; view current revision
1296          *   \<- Previous version | Next Version -\>
1297          *
1298          * @param int $oldid Revision ID of this article revision
1299          */
1300         public function setOldSubtitle( $oldid = 0 ) {
1301                 // Avoid PHP 7.1 warning of passing $this by reference
1302                 $articlePage = $this;
1303
1304                 if ( !Hooks::run( 'DisplayOldSubtitle', [ &$articlePage, &$oldid ] ) ) {
1305                         return;
1306                 }
1307
1308                 $context = $this->getContext();
1309                 $unhide = $context->getRequest()->getInt( 'unhide' ) == 1;
1310
1311                 # Cascade unhide param in links for easy deletion browsing
1312                 $extraParams = [];
1313                 if ( $unhide ) {
1314                         $extraParams['unhide'] = 1;
1315                 }
1316
1317                 if ( $this->mRevision && $this->mRevision->getId() === $oldid ) {
1318                         $revision = $this->mRevision;
1319                 } else {
1320                         $revision = Revision::newFromId( $oldid );
1321                 }
1322
1323                 $timestamp = $revision->getTimestamp();
1324
1325                 $current = ( $oldid == $this->mPage->getLatest() );
1326                 $language = $context->getLanguage();
1327                 $user = $context->getUser();
1328
1329                 $td = $language->userTimeAndDate( $timestamp, $user );
1330                 $tddate = $language->userDate( $timestamp, $user );
1331                 $tdtime = $language->userTime( $timestamp, $user );
1332
1333                 # Show user links if allowed to see them. If hidden, then show them only if requested...
1334                 $userlinks = Linker::revUserTools( $revision, !$unhide );
1335
1336                 $infomsg = $current && !$context->msg( 'revision-info-current' )->isDisabled()
1337                         ? 'revision-info-current'
1338                         : 'revision-info';
1339
1340                 $outputPage = $context->getOutput();
1341                 $revisionInfo = "<div id=\"mw-{$infomsg}\">" .
1342                         $context->msg( $infomsg, $td )
1343                                 ->rawParams( $userlinks )
1344                                 ->params( $revision->getId(), $tddate, $tdtime, $revision->getUserText() )
1345                                 ->rawParams( Linker::revComment( $revision, true, true ) )
1346                                 ->parse() .
1347                         "</div>";
1348
1349                 $lnk = $current
1350                         ? $context->msg( 'currentrevisionlink' )->escaped()
1351                         : Linker::linkKnown(
1352                                 $this->getTitle(),
1353                                 $context->msg( 'currentrevisionlink' )->escaped(),
1354                                 [],
1355                                 $extraParams
1356                         );
1357                 $curdiff = $current
1358                         ? $context->msg( 'diff' )->escaped()
1359                         : Linker::linkKnown(
1360                                 $this->getTitle(),
1361                                 $context->msg( 'diff' )->escaped(),
1362                                 [],
1363                                 [
1364                                         'diff' => 'cur',
1365                                         'oldid' => $oldid
1366                                 ] + $extraParams
1367                         );
1368                 $prev = $this->getTitle()->getPreviousRevisionID( $oldid );
1369                 $prevlink = $prev
1370                         ? Linker::linkKnown(
1371                                 $this->getTitle(),
1372                                 $context->msg( 'previousrevision' )->escaped(),
1373                                 [],
1374                                 [
1375                                         'direction' => 'prev',
1376                                         'oldid' => $oldid
1377                                 ] + $extraParams
1378                         )
1379                         : $context->msg( 'previousrevision' )->escaped();
1380                 $prevdiff = $prev
1381                         ? Linker::linkKnown(
1382                                 $this->getTitle(),
1383                                 $context->msg( 'diff' )->escaped(),
1384                                 [],
1385                                 [
1386                                         'diff' => 'prev',
1387                                         'oldid' => $oldid
1388                                 ] + $extraParams
1389                         )
1390                         : $context->msg( 'diff' )->escaped();
1391                 $nextlink = $current
1392                         ? $context->msg( 'nextrevision' )->escaped()
1393                         : Linker::linkKnown(
1394                                 $this->getTitle(),
1395                                 $context->msg( 'nextrevision' )->escaped(),
1396                                 [],
1397                                 [
1398                                         'direction' => 'next',
1399                                         'oldid' => $oldid
1400                                 ] + $extraParams
1401                         );
1402                 $nextdiff = $current
1403                         ? $context->msg( 'diff' )->escaped()
1404                         : Linker::linkKnown(
1405                                 $this->getTitle(),
1406                                 $context->msg( 'diff' )->escaped(),
1407                                 [],
1408                                 [
1409                                         'diff' => 'next',
1410                                         'oldid' => $oldid
1411                                 ] + $extraParams
1412                         );
1413
1414                 $cdel = Linker::getRevDeleteLink( $user, $revision, $this->getTitle() );
1415                 if ( $cdel !== '' ) {
1416                         $cdel .= ' ';
1417                 }
1418
1419                 // the outer div is need for styling the revision info and nav in MobileFrontend
1420                 $outputPage->addSubtitle( "<div class=\"mw-revision\">" . $revisionInfo .
1421                         "<div id=\"mw-revision-nav\">" . $cdel .
1422                         $context->msg( 'revision-nav' )->rawParams(
1423                                 $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff
1424                         )->escaped() . "</div></div>" );
1425         }
1426
1427         /**
1428          * Return the HTML for the top of a redirect page
1429          *
1430          * Chances are you should just be using the ParserOutput from
1431          * WikitextContent::getParserOutput instead of calling this for redirects.
1432          *
1433          * @param Title|array $target Destination(s) to redirect
1434          * @param bool $appendSubtitle [optional]
1435          * @param bool $forceKnown Should the image be shown as a bluelink regardless of existence?
1436          * @return string Containing HTML with redirect link
1437          */
1438         public function viewRedirect( $target, $appendSubtitle = true, $forceKnown = false ) {
1439                 $lang = $this->getTitle()->getPageLanguage();
1440                 $out = $this->getContext()->getOutput();
1441                 if ( $appendSubtitle ) {
1442                         $out->addSubtitle( wfMessage( 'redirectpagesub' ) );
1443                 }
1444                 $out->addModuleStyles( 'mediawiki.action.view.redirectPage' );
1445                 return static::getRedirectHeaderHtml( $lang, $target, $forceKnown );
1446         }
1447
1448         /**
1449          * Return the HTML for the top of a redirect page
1450          *
1451          * Chances are you should just be using the ParserOutput from
1452          * WikitextContent::getParserOutput instead of calling this for redirects.
1453          *
1454          * @since 1.23
1455          * @param Language $lang
1456          * @param Title|array $target Destination(s) to redirect
1457          * @param bool $forceKnown Should the image be shown as a bluelink regardless of existence?
1458          * @return string Containing HTML with redirect link
1459          */
1460         public static function getRedirectHeaderHtml( Language $lang, $target, $forceKnown = false ) {
1461                 if ( !is_array( $target ) ) {
1462                         $target = [ $target ];
1463                 }
1464
1465                 $html = '<ul class="redirectText">';
1466                 /** @var Title $title */
1467                 foreach ( $target as $title ) {
1468                         $html .= '<li>' . Linker::link(
1469                                 $title,
1470                                 htmlspecialchars( $title->getFullText() ),
1471                                 [],
1472                                 // Make sure wiki page redirects are not followed
1473                                 $title->isRedirect() ? [ 'redirect' => 'no' ] : [],
1474                                 ( $forceKnown ? [ 'known', 'noclasses' ] : [] )
1475                         ) . '</li>';
1476                 }
1477                 $html .= '</ul>';
1478
1479                 $redirectToText = wfMessage( 'redirectto' )->inLanguage( $lang )->escaped();
1480
1481                 return '<div class="redirectMsg">' .
1482                         '<p>' . $redirectToText . '</p>' .
1483                         $html .
1484                         '</div>';
1485         }
1486
1487         /**
1488          * Adds help link with an icon via page indicators.
1489          * Link target can be overridden by a local message containing a wikilink:
1490          * the message key is: 'namespace-' + namespace number + '-helppage'.
1491          * @param string $to Target MediaWiki.org page title or encoded URL.
1492          * @param bool $overrideBaseUrl Whether $url is a full URL, to avoid MW.o.
1493          * @since 1.25
1494          */
1495         public function addHelpLink( $to, $overrideBaseUrl = false ) {
1496                 $msg = wfMessage(
1497                         'namespace-' . $this->getTitle()->getNamespace() . '-helppage'
1498                 );
1499
1500                 $out = $this->getContext()->getOutput();
1501                 if ( !$msg->isDisabled() ) {
1502                         $helpUrl = Skin::makeUrl( $msg->plain() );
1503                         $out->addHelpLink( $helpUrl, true );
1504                 } else {
1505                         $out->addHelpLink( $to, $overrideBaseUrl );
1506                 }
1507         }
1508
1509         /**
1510          * Handle action=render
1511          */
1512         public function render() {
1513                 $this->getContext()->getRequest()->response()->header( 'X-Robots-Tag: noindex' );
1514                 $this->getContext()->getOutput()->setArticleBodyOnly( true );
1515                 $this->getContext()->getOutput()->enableSectionEditLinks( false );
1516                 $this->view();
1517         }
1518
1519         /**
1520          * action=protect handler
1521          */
1522         public function protect() {
1523                 $form = new ProtectionForm( $this );
1524                 $form->execute();
1525         }
1526
1527         /**
1528          * action=unprotect handler (alias)
1529          */
1530         public function unprotect() {
1531                 $this->protect();
1532         }
1533
1534         /**
1535          * UI entry point for page deletion
1536          */
1537         public function delete() {
1538                 # This code desperately needs to be totally rewritten
1539
1540                 $title = $this->getTitle();
1541                 $context = $this->getContext();
1542                 $user = $context->getUser();
1543                 $request = $context->getRequest();
1544
1545                 # Check permissions
1546                 $permissionErrors = $title->getUserPermissionsErrors( 'delete', $user );
1547                 if ( count( $permissionErrors ) ) {
1548                         throw new PermissionsError( 'delete', $permissionErrors );
1549                 }
1550
1551                 # Read-only check...
1552                 if ( wfReadOnly() ) {
1553                         throw new ReadOnlyError;
1554                 }
1555
1556                 # Better double-check that it hasn't been deleted yet!
1557                 $this->mPage->loadPageData(
1558                         $request->wasPosted() ? WikiPage::READ_LATEST : WikiPage::READ_NORMAL
1559                 );
1560                 if ( !$this->mPage->exists() ) {
1561                         $deleteLogPage = new LogPage( 'delete' );
1562                         $outputPage = $context->getOutput();
1563                         $outputPage->setPageTitle( $context->msg( 'cannotdelete-title', $title->getPrefixedText() ) );
1564                         $outputPage->wrapWikiMsg( "<div class=\"error mw-error-cannotdelete\">\n$1\n</div>",
1565                                         [ 'cannotdelete', wfEscapeWikiText( $title->getPrefixedText() ) ]
1566                                 );
1567                         $outputPage->addHTML(
1568                                 Xml::element( 'h2', null, $deleteLogPage->getName()->text() )
1569                         );
1570                         LogEventsList::showLogExtract(
1571                                 $outputPage,
1572                                 'delete',
1573                                 $title
1574                         );
1575
1576                         return;
1577                 }
1578
1579                 $deleteReasonList = $request->getText( 'wpDeleteReasonList', 'other' );
1580                 $deleteReason = $request->getText( 'wpReason' );
1581
1582                 if ( $deleteReasonList == 'other' ) {
1583                         $reason = $deleteReason;
1584                 } elseif ( $deleteReason != '' ) {
1585                         // Entry from drop down menu + additional comment
1586                         $colonseparator = wfMessage( 'colon-separator' )->inContentLanguage()->text();
1587                         $reason = $deleteReasonList . $colonseparator . $deleteReason;
1588                 } else {
1589                         $reason = $deleteReasonList;
1590                 }
1591
1592                 if ( $request->wasPosted() && $user->matchEditToken( $request->getVal( 'wpEditToken' ),
1593                         [ 'delete', $this->getTitle()->getPrefixedText() ] )
1594                 ) {
1595                         # Flag to hide all contents of the archived revisions
1596                         $suppress = $request->getVal( 'wpSuppress' ) && $user->isAllowed( 'suppressrevision' );
1597
1598                         $this->doDelete( $reason, $suppress );
1599
1600                         WatchAction::doWatchOrUnwatch( $request->getCheck( 'wpWatch' ), $title, $user );
1601
1602                         return;
1603                 }
1604
1605                 // Generate deletion reason
1606                 $hasHistory = false;
1607                 if ( !$reason ) {
1608                         try {
1609                                 $reason = $this->generateReason( $hasHistory );
1610                         } catch ( Exception $e ) {
1611                                 # if a page is horribly broken, we still want to be able to
1612                                 # delete it. So be lenient about errors here.
1613                                 wfDebug( "Error while building auto delete summary: $e" );
1614                                 $reason = '';
1615                         }
1616                 }
1617
1618                 // If the page has a history, insert a warning
1619                 if ( $hasHistory ) {
1620                         $title = $this->getTitle();
1621
1622                         // The following can use the real revision count as this is only being shown for users
1623                         // that can delete this page.
1624                         // This, as a side-effect, also makes sure that the following query isn't being run for
1625                         // pages with a larger history, unless the user has the 'bigdelete' right
1626                         // (and is about to delete this page).
1627                         $dbr = wfGetDB( DB_REPLICA );
1628                         $revisions = $edits = (int)$dbr->selectField(
1629                                 'revision',
1630                                 'COUNT(rev_page)',
1631                                 [ 'rev_page' => $title->getArticleID() ],
1632                                 __METHOD__
1633                         );
1634
1635                         // @todo FIXME: i18n issue/patchwork message
1636                         $context->getOutput()->addHTML(
1637                                 '<strong class="mw-delete-warning-revisions">' .
1638                                 $context->msg( 'historywarning' )->numParams( $revisions )->parse() .
1639                                 $context->msg( 'word-separator' )->escaped() . Linker::linkKnown( $title,
1640                                         $context->msg( 'history' )->escaped(),
1641                                         [],
1642                                         [ 'action' => 'history' ] ) .
1643                                 '</strong>'
1644                         );
1645
1646                         if ( $title->isBigDeletion() ) {
1647                                 global $wgDeleteRevisionsLimit;
1648                                 $context->getOutput()->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
1649                                         [
1650                                                 'delete-warning-toobig',
1651                                                 $context->getLanguage()->formatNum( $wgDeleteRevisionsLimit )
1652                                         ]
1653                                 );
1654                         }
1655                 }
1656
1657                 $this->confirmDelete( $reason );
1658         }
1659
1660         /**
1661          * Output deletion confirmation dialog
1662          * @todo FIXME: Move to another file?
1663          * @param string $reason Prefilled reason
1664          */
1665         public function confirmDelete( $reason ) {
1666                 wfDebug( "Article::confirmDelete\n" );
1667
1668                 $title = $this->getTitle();
1669                 $ctx = $this->getContext();
1670                 $outputPage = $ctx->getOutput();
1671                 $useMediaWikiUIEverywhere = $ctx->getConfig()->get( 'UseMediaWikiUIEverywhere' );
1672                 $outputPage->setPageTitle( wfMessage( 'delete-confirm', $title->getPrefixedText() ) );
1673                 $outputPage->addBacklinkSubtitle( $title );
1674                 $outputPage->setRobotPolicy( 'noindex,nofollow' );
1675                 $backlinkCache = $title->getBacklinkCache();
1676                 if ( $backlinkCache->hasLinks( 'pagelinks' ) || $backlinkCache->hasLinks( 'templatelinks' ) ) {
1677                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1678                                 'deleting-backlinks-warning' );
1679                 }
1680                 $outputPage->addWikiMsg( 'confirmdeletetext' );
1681
1682                 Hooks::run( 'ArticleConfirmDelete', [ $this, $outputPage, &$reason ] );
1683
1684                 $user = $this->getContext()->getUser();
1685                 if ( $user->isAllowed( 'suppressrevision' ) ) {
1686                         $suppress = Html::openElement( 'div', [ 'id' => 'wpDeleteSuppressRow' ] ) .
1687                                 Xml::checkLabel( wfMessage( 'revdelete-suppress' )->text(),
1688                                         'wpSuppress', 'wpSuppress', false, [ 'tabindex' => '4' ] ) .
1689                                 Html::closeElement( 'div' );
1690                 } else {
1691                         $suppress = '';
1692                 }
1693                 $checkWatch = $user->getBoolOption( 'watchdeletion' ) || $user->isWatched( $title );
1694
1695                 $outputPage->enableOOUI();
1696
1697                 $options = [];
1698                 $options[] = [
1699                         'data' => 'other',
1700                         'label' => $ctx->msg( 'deletereasonotherlist' )->inContentLanguage()->text(),
1701                 ];
1702                 $list = $ctx->msg( 'deletereason-dropdown' )->inContentLanguage()->text();
1703                 foreach ( explode( "\n", $list ) as $option ) {
1704                         $value = trim( $option );
1705                         if ( $value == '' ) {
1706                                 continue;
1707                         } elseif ( substr( $value, 0, 1 ) == '*' && substr( $value, 1, 1 ) != '*' ) {
1708                                 $options[] = [ 'optgroup' => trim( substr( $value, 1 ) ) ];
1709                         } elseif ( substr( $value, 0, 2 ) == '**' ) {
1710                                 $options[] = [ 'data' => trim( substr( $value, 2 ) ) ];
1711                         } else {
1712                                 $options[] = [ 'data' => trim( $value ) ];
1713                         }
1714                 }
1715
1716                 $fields[] = new OOUI\FieldLayout(
1717                         new OOUI\DropdownInputWidget( [
1718                                 'name' => 'wpDeleteReasonList',
1719                                 'inputId' => 'wpDeleteReasonList',
1720                                 'tabIndex' => 1,
1721                                 'infusable' => true,
1722                                 'value' => '',
1723                                 'options' => $options
1724                         ] ),
1725                         [
1726                                 'label' => $ctx->msg( 'deletecomment' )->text(),
1727                                 'align' => 'top',
1728                         ]
1729                 );
1730
1731                 $fields[] = new OOUI\FieldLayout(
1732                         new OOUI\TextInputWidget( [
1733                                 'name' => 'wpReason',
1734                                 'inputId' => 'wpReason',
1735                                 'tabIndex' => 2,
1736                                 'maxLength' => 255,
1737                                 'infusable' => true,
1738                                 'value' => $reason,
1739                                 'autofocus' => true,
1740                         ] ),
1741                         [
1742                                 'label' => $ctx->msg( 'deleteotherreason' )->text(),
1743                                 'align' => 'top',
1744                         ]
1745                 );
1746
1747                 if ( $user->isLoggedIn() ) {
1748                         $fields[] = new OOUI\FieldLayout(
1749                                 new OOUI\CheckboxInputWidget( [
1750                                         'name' => 'wpWatch',
1751                                         'inputId' => 'wpWatch',
1752                                         'tabIndex' => 3,
1753                                         'selected' => $checkWatch,
1754                                 ] ),
1755                                 [
1756                                         'label' => $ctx->msg( 'watchthis' )->text(),
1757                                         'align' => 'inline',
1758                                         'infusable' => true,
1759                                 ]
1760                         );
1761                 }
1762
1763                 $fields[] = new OOUI\FieldLayout(
1764                         new OOUI\ButtonInputWidget( [
1765                                 'name' => 'wpConfirmB',
1766                                 'inputId' => 'wpConfirmB',
1767                                 'tabIndex' => 5,
1768                                 'value' => $ctx->msg( 'deletepage' )->text(),
1769                                 'label' => $ctx->msg( 'deletepage' )->text(),
1770                                 'flags' => [ 'primary', 'destructive' ],
1771                                 'type' => 'submit',
1772                         ] ),
1773                         [
1774                                 'align' => 'top',
1775                         ]
1776                 );
1777
1778                 $fieldset = new OOUI\FieldsetLayout( [
1779                         'label' => $ctx->msg( 'delete-legend' )->text(),
1780                         'id' => 'mw-delete-table',
1781                         'items' => $fields,
1782                 ] );
1783
1784                 $form = new OOUI\FormLayout( [
1785                         'method' => 'post',
1786                         'action' => $title->getLocalURL( 'action=delete' ),
1787                         'id' => 'deleteconfirm',
1788                 ] );
1789                 $form->appendContent(
1790                         $fieldset,
1791                         new OOUI\HtmlSnippet(
1792                                 Html::hidden( 'wpEditToken', $user->getEditToken( [ 'delete', $title->getPrefixedText() ] ) )
1793                         )
1794                 );
1795
1796                 $outputPage->addHTML(
1797                         new OOUI\PanelLayout( [
1798                                 'classes' => [ 'deletepage-wrapper' ],
1799                                 'expanded' => false,
1800                                 'padded' => true,
1801                                 'framed' => true,
1802                                 'content' => $form,
1803                         ] )
1804                 );
1805
1806                 if ( $user->isAllowed( 'editinterface' ) ) {
1807                         $link = Linker::linkKnown(
1808                                 $ctx->msg( 'deletereason-dropdown' )->inContentLanguage()->getTitle(),
1809                                 wfMessage( 'delete-edit-reasonlist' )->escaped(),
1810                                 [],
1811                                 [ 'action' => 'edit' ]
1812                         );
1813                         $outputPage->addHTML( '<p class="mw-delete-editreasons">' . $link . '</p>' );
1814                 }
1815
1816                 $deleteLogPage = new LogPage( 'delete' );
1817                 $outputPage->addHTML( Xml::element( 'h2', null, $deleteLogPage->getName()->text() ) );
1818                 LogEventsList::showLogExtract( $outputPage, 'delete', $title );
1819         }
1820
1821         /**
1822          * Perform a deletion and output success or failure messages
1823          * @param string $reason
1824          * @param bool $suppress
1825          */
1826         public function doDelete( $reason, $suppress = false ) {
1827                 $error = '';
1828                 $context = $this->getContext();
1829                 $outputPage = $context->getOutput();
1830                 $user = $context->getUser();
1831                 $status = $this->mPage->doDeleteArticleReal( $reason, $suppress, 0, true, $error, $user );
1832
1833                 if ( $status->isGood() ) {
1834                         $deleted = $this->getTitle()->getPrefixedText();
1835
1836                         $outputPage->setPageTitle( wfMessage( 'actioncomplete' ) );
1837                         $outputPage->setRobotPolicy( 'noindex,nofollow' );
1838
1839                         $loglink = '[[Special:Log/delete|' . wfMessage( 'deletionlog' )->text() . ']]';
1840
1841                         $outputPage->addWikiMsg( 'deletedtext', wfEscapeWikiText( $deleted ), $loglink );
1842
1843                         Hooks::run( 'ArticleDeleteAfterSuccess', [ $this->getTitle(), $outputPage ] );
1844
1845                         $outputPage->returnToMain( false );
1846                 } else {
1847                         $outputPage->setPageTitle(
1848                                 wfMessage( 'cannotdelete-title',
1849                                         $this->getTitle()->getPrefixedText() )
1850                         );
1851
1852                         if ( $error == '' ) {
1853                                 $outputPage->addWikiText(
1854                                         "<div class=\"error mw-error-cannotdelete\">\n" . $status->getWikiText() . "\n</div>"
1855                                 );
1856                                 $deleteLogPage = new LogPage( 'delete' );
1857                                 $outputPage->addHTML( Xml::element( 'h2', null, $deleteLogPage->getName()->text() ) );
1858
1859                                 LogEventsList::showLogExtract(
1860                                         $outputPage,
1861                                         'delete',
1862                                         $this->getTitle()
1863                                 );
1864                         } else {
1865                                 $outputPage->addHTML( $error );
1866                         }
1867                 }
1868         }
1869
1870         /* Caching functions */
1871
1872         /**
1873          * checkLastModified returns true if it has taken care of all
1874          * output to the client that is necessary for this request.
1875          * (that is, it has sent a cached version of the page)
1876          *
1877          * @return bool True if cached version send, false otherwise
1878          */
1879         protected function tryFileCache() {
1880                 static $called = false;
1881
1882                 if ( $called ) {
1883                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
1884                         return false;
1885                 }
1886
1887                 $called = true;
1888                 if ( $this->isFileCacheable() ) {
1889                         $cache = new HTMLFileCache( $this->getTitle(), 'view' );
1890                         if ( $cache->isCacheGood( $this->mPage->getTouched() ) ) {
1891                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
1892                                 $cache->loadFromFileCache( $this->getContext() );
1893                                 return true;
1894                         } else {
1895                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
1896                                 ob_start( [ &$cache, 'saveToFileCache' ] );
1897                         }
1898                 } else {
1899                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
1900                 }
1901
1902                 return false;
1903         }
1904
1905         /**
1906          * Check if the page can be cached
1907          * @param integer $mode One of the HTMLFileCache::MODE_* constants (since 1.28)
1908          * @return bool
1909          */
1910         public function isFileCacheable( $mode = HTMLFileCache::MODE_NORMAL ) {
1911                 $cacheable = false;
1912
1913                 if ( HTMLFileCache::useFileCache( $this->getContext(), $mode ) ) {
1914                         $cacheable = $this->mPage->getId()
1915                                 && !$this->mRedirectedFrom && !$this->getTitle()->isRedirect();
1916                         // Extension may have reason to disable file caching on some pages.
1917                         if ( $cacheable ) {
1918                                 // Avoid PHP 7.1 warning of passing $this by reference
1919                                 $articlePage = $this;
1920                                 $cacheable = Hooks::run( 'IsFileCacheable', [ &$articlePage ] );
1921                         }
1922                 }
1923
1924                 return $cacheable;
1925         }
1926
1927         /**#@-*/
1928
1929         /**
1930          * Lightweight method to get the parser output for a page, checking the parser cache
1931          * and so on. Doesn't consider most of the stuff that WikiPage::view is forced to
1932          * consider, so it's not appropriate to use there.
1933          *
1934          * @since 1.16 (r52326) for LiquidThreads
1935          *
1936          * @param int|null $oldid Revision ID or null
1937          * @param User $user The relevant user
1938          * @return ParserOutput|bool ParserOutput or false if the given revision ID is not found
1939          */
1940         public function getParserOutput( $oldid = null, User $user = null ) {
1941                 // XXX: bypasses mParserOptions and thus setParserOptions()
1942
1943                 if ( $user === null ) {
1944                         $parserOptions = $this->getParserOptions();
1945                 } else {
1946                         $parserOptions = $this->mPage->makeParserOptions( $user );
1947                 }
1948
1949                 return $this->mPage->getParserOutput( $parserOptions, $oldid );
1950         }
1951
1952         /**
1953          * Override the ParserOptions used to render the primary article wikitext.
1954          *
1955          * @param ParserOptions $options
1956          * @throws MWException If the parser options where already initialized.
1957          */
1958         public function setParserOptions( ParserOptions $options ) {
1959                 if ( $this->mParserOptions ) {
1960                         throw new MWException( "can't change parser options after they have already been set" );
1961                 }
1962
1963                 // clone, so if $options is modified later, it doesn't confuse the parser cache.
1964                 $this->mParserOptions = clone $options;
1965         }
1966
1967         /**
1968          * Get parser options suitable for rendering the primary article wikitext
1969          * @return ParserOptions
1970          */
1971         public function getParserOptions() {
1972                 if ( !$this->mParserOptions ) {
1973                         $this->mParserOptions = $this->mPage->makeParserOptions( $this->getContext() );
1974                 }
1975                 // Clone to allow modifications of the return value without affecting cache
1976                 return clone $this->mParserOptions;
1977         }
1978
1979         /**
1980          * Sets the context this Article is executed in
1981          *
1982          * @param IContextSource $context
1983          * @since 1.18
1984          */
1985         public function setContext( $context ) {
1986                 $this->mContext = $context;
1987         }
1988
1989         /**
1990          * Gets the context this Article is executed in
1991          *
1992          * @return IContextSource
1993          * @since 1.18
1994          */
1995         public function getContext() {
1996                 if ( $this->mContext instanceof IContextSource ) {
1997                         return $this->mContext;
1998                 } else {
1999                         wfDebug( __METHOD__ . " called and \$mContext is null. " .
2000                                 "Return RequestContext::getMain(); for sanity\n" );
2001                         return RequestContext::getMain();
2002                 }
2003         }
2004
2005         /**
2006          * Use PHP's magic __get handler to handle accessing of
2007          * raw WikiPage fields for backwards compatibility.
2008          *
2009          * @param string $fname Field name
2010          * @return mixed
2011          */
2012         public function __get( $fname ) {
2013                 if ( property_exists( $this->mPage, $fname ) ) {
2014                         # wfWarn( "Access to raw $fname field " . __CLASS__ );
2015                         return $this->mPage->$fname;
2016                 }
2017                 trigger_error( 'Inaccessible property via __get(): ' . $fname, E_USER_NOTICE );
2018         }
2019
2020         /**
2021          * Use PHP's magic __set handler to handle setting of
2022          * raw WikiPage fields for backwards compatibility.
2023          *
2024          * @param string $fname Field name
2025          * @param mixed $fvalue New value
2026          */
2027         public function __set( $fname, $fvalue ) {
2028                 if ( property_exists( $this->mPage, $fname ) ) {
2029                         # wfWarn( "Access to raw $fname field of " . __CLASS__ );
2030                         $this->mPage->$fname = $fvalue;
2031                 // Note: extensions may want to toss on new fields
2032                 } elseif ( !in_array( $fname, [ 'mContext', 'mPage' ] ) ) {
2033                         $this->mPage->$fname = $fvalue;
2034                 } else {
2035                         trigger_error( 'Inaccessible property via __set(): ' . $fname, E_USER_NOTICE );
2036                 }
2037         }
2038
2039         /**
2040          * Call to WikiPage function for backwards compatibility.
2041          * @see WikiPage::checkFlags
2042          */
2043         public function checkFlags( $flags ) {
2044                 return $this->mPage->checkFlags( $flags );
2045         }
2046
2047         /**
2048          * Call to WikiPage function for backwards compatibility.
2049          * @see WikiPage::checkTouched
2050          */
2051         public function checkTouched() {
2052                 return $this->mPage->checkTouched();
2053         }
2054
2055         /**
2056          * Call to WikiPage function for backwards compatibility.
2057          * @see WikiPage::clearPreparedEdit
2058          */
2059         public function clearPreparedEdit() {
2060                 $this->mPage->clearPreparedEdit();
2061         }
2062
2063         /**
2064          * Call to WikiPage function for backwards compatibility.
2065          * @see WikiPage::doDeleteArticleReal
2066          */
2067         public function doDeleteArticleReal(
2068                 $reason, $suppress = false, $u1 = null, $u2 = null, &$error = '', User $user = null,
2069                 $tags = []
2070         ) {
2071                 return $this->mPage->doDeleteArticleReal(
2072                         $reason, $suppress, $u1, $u2, $error, $user, $tags
2073                 );
2074         }
2075
2076         /**
2077          * Call to WikiPage function for backwards compatibility.
2078          * @see WikiPage::doDeleteUpdates
2079          */
2080         public function doDeleteUpdates( $id, Content $content = null ) {
2081                 return $this->mPage->doDeleteUpdates( $id, $content );
2082         }
2083
2084         /**
2085          * Call to WikiPage function for backwards compatibility.
2086          * @deprecated since 1.29. Use WikiPage::doEditContent() directly instead
2087          * @see WikiPage::doEditContent
2088          */
2089         public function doEditContent( Content $content, $summary, $flags = 0, $baseRevId = false,
2090                 User $user = null, $serialFormat = null
2091         ) {
2092                 wfDeprecated( __METHOD__, '1.29' );
2093                 return $this->mPage->doEditContent( $content, $summary, $flags, $baseRevId,
2094                         $user, $serialFormat
2095                 );
2096         }
2097
2098         /**
2099          * Call to WikiPage function for backwards compatibility.
2100          * @see WikiPage::doEditUpdates
2101          */
2102         public function doEditUpdates( Revision $revision, User $user, array $options = [] ) {
2103                 return $this->mPage->doEditUpdates( $revision, $user, $options );
2104         }
2105
2106         /**
2107          * Call to WikiPage function for backwards compatibility.
2108          * @see WikiPage::doPurge
2109          * @note In 1.28 (and only 1.28), this took a $flags parameter that
2110          *  controlled how much purging was done.
2111          */
2112         public function doPurge() {
2113                 return $this->mPage->doPurge();
2114         }
2115
2116         /**
2117          * Call to WikiPage function for backwards compatibility.
2118          * @see WikiPage::getLastPurgeTimestamp
2119          * @deprecated since 1.29
2120          */
2121         public function getLastPurgeTimestamp() {
2122                 wfDeprecated( __METHOD__, '1.29' );
2123                 return $this->mPage->getLastPurgeTimestamp();
2124         }
2125
2126         /**
2127          * Call to WikiPage function for backwards compatibility.
2128          * @see WikiPage::doViewUpdates
2129          */
2130         public function doViewUpdates( User $user, $oldid = 0 ) {
2131                 $this->mPage->doViewUpdates( $user, $oldid );
2132         }
2133
2134         /**
2135          * Call to WikiPage function for backwards compatibility.
2136          * @see WikiPage::exists
2137          */
2138         public function exists() {
2139                 return $this->mPage->exists();
2140         }
2141
2142         /**
2143          * Call to WikiPage function for backwards compatibility.
2144          * @see WikiPage::followRedirect
2145          */
2146         public function followRedirect() {
2147                 return $this->mPage->followRedirect();
2148         }
2149
2150         /**
2151          * Call to WikiPage function for backwards compatibility.
2152          * @see ContentHandler::getActionOverrides
2153          */
2154         public function getActionOverrides() {
2155                 return $this->mPage->getActionOverrides();
2156         }
2157
2158         /**
2159          * Call to WikiPage function for backwards compatibility.
2160          * @see WikiPage::getAutoDeleteReason
2161          */
2162         public function getAutoDeleteReason( &$hasHistory ) {
2163                 return $this->mPage->getAutoDeleteReason( $hasHistory );
2164         }
2165
2166         /**
2167          * Call to WikiPage function for backwards compatibility.
2168          * @see WikiPage::getCategories
2169          */
2170         public function getCategories() {
2171                 return $this->mPage->getCategories();
2172         }
2173
2174         /**
2175          * Call to WikiPage function for backwards compatibility.
2176          * @see WikiPage::getComment
2177          */
2178         public function getComment( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2179                 return $this->mPage->getComment( $audience, $user );
2180         }
2181
2182         /**
2183          * Call to WikiPage function for backwards compatibility.
2184          * @see WikiPage::getContentHandler
2185          */
2186         public function getContentHandler() {
2187                 return $this->mPage->getContentHandler();
2188         }
2189
2190         /**
2191          * Call to WikiPage function for backwards compatibility.
2192          * @see WikiPage::getContentModel
2193          */
2194         public function getContentModel() {
2195                 return $this->mPage->getContentModel();
2196         }
2197
2198         /**
2199          * Call to WikiPage function for backwards compatibility.
2200          * @see WikiPage::getContributors
2201          */
2202         public function getContributors() {
2203                 return $this->mPage->getContributors();
2204         }
2205
2206         /**
2207          * Call to WikiPage function for backwards compatibility.
2208          * @see WikiPage::getCreator
2209          */
2210         public function getCreator( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2211                 return $this->mPage->getCreator( $audience, $user );
2212         }
2213
2214         /**
2215          * Call to WikiPage function for backwards compatibility.
2216          * @see WikiPage::getDeletionUpdates
2217          */
2218         public function getDeletionUpdates( Content $content = null ) {
2219                 return $this->mPage->getDeletionUpdates( $content );
2220         }
2221
2222         /**
2223          * Call to WikiPage function for backwards compatibility.
2224          * @see WikiPage::getHiddenCategories
2225          */
2226         public function getHiddenCategories() {
2227                 return $this->mPage->getHiddenCategories();
2228         }
2229
2230         /**
2231          * Call to WikiPage function for backwards compatibility.
2232          * @see WikiPage::getId
2233          */
2234         public function getId() {
2235                 return $this->mPage->getId();
2236         }
2237
2238         /**
2239          * Call to WikiPage function for backwards compatibility.
2240          * @see WikiPage::getLatest
2241          */
2242         public function getLatest() {
2243                 return $this->mPage->getLatest();
2244         }
2245
2246         /**
2247          * Call to WikiPage function for backwards compatibility.
2248          * @see WikiPage::getLinksTimestamp
2249          */
2250         public function getLinksTimestamp() {
2251                 return $this->mPage->getLinksTimestamp();
2252         }
2253
2254         /**
2255          * Call to WikiPage function for backwards compatibility.
2256          * @see WikiPage::getMinorEdit
2257          */
2258         public function getMinorEdit() {
2259                 return $this->mPage->getMinorEdit();
2260         }
2261
2262         /**
2263          * Call to WikiPage function for backwards compatibility.
2264          * @see WikiPage::getOldestRevision
2265          */
2266         public function getOldestRevision() {
2267                 return $this->mPage->getOldestRevision();
2268         }
2269
2270         /**
2271          * Call to WikiPage function for backwards compatibility.
2272          * @see WikiPage::getRedirectTarget
2273          */
2274         public function getRedirectTarget() {
2275                 return $this->mPage->getRedirectTarget();
2276         }
2277
2278         /**
2279          * Call to WikiPage function for backwards compatibility.
2280          * @see WikiPage::getRedirectURL
2281          */
2282         public function getRedirectURL( $rt ) {
2283                 return $this->mPage->getRedirectURL( $rt );
2284         }
2285
2286         /**
2287          * Call to WikiPage function for backwards compatibility.
2288          * @see WikiPage::getRevision
2289          */
2290         public function getRevision() {
2291                 return $this->mPage->getRevision();
2292         }
2293
2294         /**
2295          * Call to WikiPage function for backwards compatibility.
2296          * @see WikiPage::getTimestamp
2297          */
2298         public function getTimestamp() {
2299                 return $this->mPage->getTimestamp();
2300         }
2301
2302         /**
2303          * Call to WikiPage function for backwards compatibility.
2304          * @see WikiPage::getTouched
2305          */
2306         public function getTouched() {
2307                 return $this->mPage->getTouched();
2308         }
2309
2310         /**
2311          * Call to WikiPage function for backwards compatibility.
2312          * @see WikiPage::getUndoContent
2313          */
2314         public function getUndoContent( Revision $undo, Revision $undoafter = null ) {
2315                 return $this->mPage->getUndoContent( $undo, $undoafter );
2316         }
2317
2318         /**
2319          * Call to WikiPage function for backwards compatibility.
2320          * @see WikiPage::getUser
2321          */
2322         public function getUser( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2323                 return $this->mPage->getUser( $audience, $user );
2324         }
2325
2326         /**
2327          * Call to WikiPage function for backwards compatibility.
2328          * @see WikiPage::getUserText
2329          */
2330         public function getUserText( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2331                 return $this->mPage->getUserText( $audience, $user );
2332         }
2333
2334         /**
2335          * Call to WikiPage function for backwards compatibility.
2336          * @see WikiPage::hasViewableContent
2337          */
2338         public function hasViewableContent() {
2339                 return $this->mPage->hasViewableContent();
2340         }
2341
2342         /**
2343          * Call to WikiPage function for backwards compatibility.
2344          * @see WikiPage::insertOn
2345          */
2346         public function insertOn( $dbw, $pageId = null ) {
2347                 return $this->mPage->insertOn( $dbw, $pageId );
2348         }
2349
2350         /**
2351          * Call to WikiPage function for backwards compatibility.
2352          * @see WikiPage::insertProtectNullRevision
2353          */
2354         public function insertProtectNullRevision( $revCommentMsg, array $limit,
2355                 array $expiry, $cascade, $reason, $user = null
2356         ) {
2357                 return $this->mPage->insertProtectNullRevision( $revCommentMsg, $limit,
2358                         $expiry, $cascade, $reason, $user
2359                 );
2360         }
2361
2362         /**
2363          * Call to WikiPage function for backwards compatibility.
2364          * @see WikiPage::insertRedirect
2365          */
2366         public function insertRedirect() {
2367                 return $this->mPage->insertRedirect();
2368         }
2369
2370         /**
2371          * Call to WikiPage function for backwards compatibility.
2372          * @see WikiPage::insertRedirectEntry
2373          */
2374         public function insertRedirectEntry( Title $rt, $oldLatest = null ) {
2375                 return $this->mPage->insertRedirectEntry( $rt, $oldLatest );
2376         }
2377
2378         /**
2379          * Call to WikiPage function for backwards compatibility.
2380          * @see WikiPage::isCountable
2381          */
2382         public function isCountable( $editInfo = false ) {
2383                 return $this->mPage->isCountable( $editInfo );
2384         }
2385
2386         /**
2387          * Call to WikiPage function for backwards compatibility.
2388          * @see WikiPage::isRedirect
2389          */
2390         public function isRedirect() {
2391                 return $this->mPage->isRedirect();
2392         }
2393
2394         /**
2395          * Call to WikiPage function for backwards compatibility.
2396          * @see WikiPage::loadFromRow
2397          */
2398         public function loadFromRow( $data, $from ) {
2399                 return $this->mPage->loadFromRow( $data, $from );
2400         }
2401
2402         /**
2403          * Call to WikiPage function for backwards compatibility.
2404          * @see WikiPage::loadPageData
2405          */
2406         public function loadPageData( $from = 'fromdb' ) {
2407                 $this->mPage->loadPageData( $from );
2408         }
2409
2410         /**
2411          * Call to WikiPage function for backwards compatibility.
2412          * @see WikiPage::lockAndGetLatest
2413          */
2414         public function lockAndGetLatest() {
2415                 return $this->mPage->lockAndGetLatest();
2416         }
2417
2418         /**
2419          * Call to WikiPage function for backwards compatibility.
2420          * @see WikiPage::makeParserOptions
2421          */
2422         public function makeParserOptions( $context ) {
2423                 return $this->mPage->makeParserOptions( $context );
2424         }
2425
2426         /**
2427          * Call to WikiPage function for backwards compatibility.
2428          * @see WikiPage::pageDataFromId
2429          */
2430         public function pageDataFromId( $dbr, $id, $options = [] ) {
2431                 return $this->mPage->pageDataFromId( $dbr, $id, $options );
2432         }
2433
2434         /**
2435          * Call to WikiPage function for backwards compatibility.
2436          * @see WikiPage::pageDataFromTitle
2437          */
2438         public function pageDataFromTitle( $dbr, $title, $options = [] ) {
2439                 return $this->mPage->pageDataFromTitle( $dbr, $title, $options );
2440         }
2441
2442         /**
2443          * Call to WikiPage function for backwards compatibility.
2444          * @see WikiPage::prepareContentForEdit
2445          */
2446         public function prepareContentForEdit(
2447                 Content $content, $revision = null, User $user = null,
2448                 $serialFormat = null, $useCache = true
2449         ) {
2450                 return $this->mPage->prepareContentForEdit(
2451                         $content, $revision, $user,
2452                         $serialFormat, $useCache
2453                 );
2454         }
2455
2456         /**
2457          * Call to WikiPage function for backwards compatibility.
2458          * @see WikiPage::protectDescription
2459          */
2460         public function protectDescription( array $limit, array $expiry ) {
2461                 return $this->mPage->protectDescription( $limit, $expiry );
2462         }
2463
2464         /**
2465          * Call to WikiPage function for backwards compatibility.
2466          * @see WikiPage::protectDescriptionLog
2467          */
2468         public function protectDescriptionLog( array $limit, array $expiry ) {
2469                 return $this->mPage->protectDescriptionLog( $limit, $expiry );
2470         }
2471
2472         /**
2473          * Call to WikiPage function for backwards compatibility.
2474          * @see WikiPage::replaceSectionAtRev
2475          */
2476         public function replaceSectionAtRev( $sectionId, Content $sectionContent,
2477                 $sectionTitle = '', $baseRevId = null
2478         ) {
2479                 return $this->mPage->replaceSectionAtRev( $sectionId, $sectionContent,
2480                         $sectionTitle, $baseRevId
2481                 );
2482         }
2483
2484         /**
2485          * Call to WikiPage function for backwards compatibility.
2486          * @see WikiPage::replaceSectionContent
2487          */
2488         public function replaceSectionContent(
2489                 $sectionId, Content $sectionContent, $sectionTitle = '', $edittime = null
2490         ) {
2491                 return $this->mPage->replaceSectionContent(
2492                         $sectionId, $sectionContent, $sectionTitle, $edittime
2493                 );
2494         }
2495
2496         /**
2497          * Call to WikiPage function for backwards compatibility.
2498          * @see WikiPage::setTimestamp
2499          */
2500         public function setTimestamp( $ts ) {
2501                 return $this->mPage->setTimestamp( $ts );
2502         }
2503
2504         /**
2505          * Call to WikiPage function for backwards compatibility.
2506          * @see WikiPage::shouldCheckParserCache
2507          */
2508         public function shouldCheckParserCache( ParserOptions $parserOptions, $oldId ) {
2509                 return $this->mPage->shouldCheckParserCache( $parserOptions, $oldId );
2510         }
2511
2512         /**
2513          * Call to WikiPage function for backwards compatibility.
2514          * @see WikiPage::supportsSections
2515          */
2516         public function supportsSections() {
2517                 return $this->mPage->supportsSections();
2518         }
2519
2520         /**
2521          * Call to WikiPage function for backwards compatibility.
2522          * @see WikiPage::triggerOpportunisticLinksUpdate
2523          */
2524         public function triggerOpportunisticLinksUpdate( ParserOutput $parserOutput ) {
2525                 return $this->mPage->triggerOpportunisticLinksUpdate( $parserOutput );
2526         }
2527
2528         /**
2529          * Call to WikiPage function for backwards compatibility.
2530          * @see WikiPage::updateCategoryCounts
2531          */
2532         public function updateCategoryCounts( array $added, array $deleted, $id = 0 ) {
2533                 return $this->mPage->updateCategoryCounts( $added, $deleted, $id );
2534         }
2535
2536         /**
2537          * Call to WikiPage function for backwards compatibility.
2538          * @see WikiPage::updateIfNewerOn
2539          */
2540         public function updateIfNewerOn( $dbw, $revision ) {
2541                 return $this->mPage->updateIfNewerOn( $dbw, $revision );
2542         }
2543
2544         /**
2545          * Call to WikiPage function for backwards compatibility.
2546          * @see WikiPage::updateRedirectOn
2547          */
2548         public function updateRedirectOn( $dbw, $redirectTitle, $lastRevIsRedirect = null ) {
2549                 return $this->mPage->updateRedirectOn( $dbw, $redirectTitle, $lastRevIsRedirect = null );
2550         }
2551
2552         /**
2553          * Call to WikiPage function for backwards compatibility.
2554          * @see WikiPage::updateRevisionOn
2555          */
2556         public function updateRevisionOn( $dbw, $revision, $lastRevision = null,
2557                 $lastRevIsRedirect = null
2558         ) {
2559                 return $this->mPage->updateRevisionOn( $dbw, $revision, $lastRevision,
2560                         $lastRevIsRedirect
2561                 );
2562         }
2563
2564         /**
2565          * @param array $limit
2566          * @param array $expiry
2567          * @param bool $cascade
2568          * @param string $reason
2569          * @param User $user
2570          * @return Status
2571          */
2572         public function doUpdateRestrictions( array $limit, array $expiry, &$cascade,
2573                 $reason, User $user
2574         ) {
2575                 return $this->mPage->doUpdateRestrictions( $limit, $expiry, $cascade, $reason, $user );
2576         }
2577
2578         /**
2579          * @param array $limit
2580          * @param string $reason
2581          * @param int $cascade
2582          * @param array $expiry
2583          * @return bool
2584          */
2585         public function updateRestrictions( $limit = [], $reason = '',
2586                 &$cascade = 0, $expiry = []
2587         ) {
2588                 return $this->mPage->doUpdateRestrictions(
2589                         $limit,
2590                         $expiry,
2591                         $cascade,
2592                         $reason,
2593                         $this->getContext()->getUser()
2594                 );
2595         }
2596
2597         /**
2598          * @param string $reason
2599          * @param bool $suppress
2600          * @param int $u1 Unused
2601          * @param bool $u2 Unused
2602          * @param string $error
2603          * @return bool
2604          */
2605         public function doDeleteArticle(
2606                 $reason, $suppress = false, $u1 = null, $u2 = null, &$error = ''
2607         ) {
2608                 return $this->mPage->doDeleteArticle( $reason, $suppress, $u1, $u2, $error );
2609         }
2610
2611         /**
2612          * @param string $fromP
2613          * @param string $summary
2614          * @param string $token
2615          * @param bool $bot
2616          * @param array $resultDetails
2617          * @param User|null $user
2618          * @return array
2619          */
2620         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails, User $user = null ) {
2621                 $user = is_null( $user ) ? $this->getContext()->getUser() : $user;
2622                 return $this->mPage->doRollback( $fromP, $summary, $token, $bot, $resultDetails, $user );
2623         }
2624
2625         /**
2626          * @param string $fromP
2627          * @param string $summary
2628          * @param bool $bot
2629          * @param array $resultDetails
2630          * @param User|null $guser
2631          * @return array
2632          */
2633         public function commitRollback( $fromP, $summary, $bot, &$resultDetails, User $guser = null ) {
2634                 $guser = is_null( $guser ) ? $this->getContext()->getUser() : $guser;
2635                 return $this->mPage->commitRollback( $fromP, $summary, $bot, $resultDetails, $guser );
2636         }
2637
2638         /**
2639          * @param bool $hasHistory
2640          * @return mixed
2641          */
2642         public function generateReason( &$hasHistory ) {
2643                 $title = $this->mPage->getTitle();
2644                 $handler = ContentHandler::getForTitle( $title );
2645                 return $handler->getAutoDeleteReason( $title, $hasHistory );
2646         }
2647
2648         /**
2649          * @return array
2650          *
2651          * @deprecated since 1.24, use WikiPage::selectFields() instead
2652          */
2653         public static function selectFields() {
2654                 wfDeprecated( __METHOD__, '1.24' );
2655                 return WikiPage::selectFields();
2656         }
2657
2658         /**
2659          * @param Title $title
2660          *
2661          * @deprecated since 1.24, use WikiPage::onArticleCreate() instead
2662          */
2663         public static function onArticleCreate( $title ) {
2664                 wfDeprecated( __METHOD__, '1.24' );
2665                 WikiPage::onArticleCreate( $title );
2666         }
2667
2668         /**
2669          * @param Title $title
2670          *
2671          * @deprecated since 1.24, use WikiPage::onArticleDelete() instead
2672          */
2673         public static function onArticleDelete( $title ) {
2674                 wfDeprecated( __METHOD__, '1.24' );
2675                 WikiPage::onArticleDelete( $title );
2676         }
2677
2678         /**
2679          * @param Title $title
2680          *
2681          * @deprecated since 1.24, use WikiPage::onArticleEdit() instead
2682          */
2683         public static function onArticleEdit( $title ) {
2684                 wfDeprecated( __METHOD__, '1.24' );
2685                 WikiPage::onArticleEdit( $title );
2686         }
2687
2688         // ******
2689 }