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                 $form = Html::openElement( 'form', [ 'method' => 'post',
1695                         'action' => $title->getLocalURL( 'action=delete' ), 'id' => 'deleteconfirm' ] ) .
1696                         Html::openElement( 'fieldset', [ 'id' => 'mw-delete-table' ] ) .
1697                         Html::element( 'legend', null, wfMessage( 'delete-legend' )->text() ) .
1698                         Html::openElement( 'div', [ 'id' => 'mw-deleteconfirm-table' ] ) .
1699                         Html::openElement( 'div', [ 'id' => 'wpDeleteReasonListRow' ] ) .
1700                         Html::label( wfMessage( 'deletecomment' )->text(), 'wpDeleteReasonList' ) .
1701                         '&nbsp;' .
1702                         Xml::listDropDown(
1703                                 'wpDeleteReasonList',
1704                                 wfMessage( 'deletereason-dropdown' )->inContentLanguage()->text(),
1705                                 wfMessage( 'deletereasonotherlist' )->inContentLanguage()->text(),
1706                                 '',
1707                                 'wpReasonDropDown',
1708                                 1
1709                         ) .
1710                         Html::closeElement( 'div' ) .
1711                         Html::openElement( 'div', [ 'id' => 'wpDeleteReasonRow' ] ) .
1712                         Html::label( wfMessage( 'deleteotherreason' )->text(), 'wpReason' ) .
1713                         '&nbsp;' .
1714                         Html::input( 'wpReason', $reason, 'text', [
1715                                 'size' => '60',
1716                                 'maxlength' => '255',
1717                                 'tabindex' => '2',
1718                                 'id' => 'wpReason',
1719                                 'class' => 'mw-ui-input-inline',
1720                                 'autofocus'
1721                         ] ) .
1722                         Html::closeElement( 'div' );
1723
1724                 # Disallow watching if user is not logged in
1725                 if ( $user->isLoggedIn() ) {
1726                         $form .=
1727                                         Xml::checkLabel( wfMessage( 'watchthis' )->text(),
1728                                                 'wpWatch', 'wpWatch', $checkWatch, [ 'tabindex' => '3' ] );
1729                 }
1730
1731                 $form .=
1732                                 Html::openElement( 'div' ) .
1733                                 $suppress .
1734                                         Xml::submitButton( wfMessage( 'deletepage' )->text(),
1735                                                 [
1736                                                         'name' => 'wpConfirmB',
1737                                                         'id' => 'wpConfirmB',
1738                                                         'tabindex' => '5',
1739                                                         'class' => $useMediaWikiUIEverywhere ? 'mw-ui-button mw-ui-destructive' : '',
1740                                                 ]
1741                                         ) .
1742                                 Html::closeElement( 'div' ) .
1743                         Html::closeElement( 'div' ) .
1744                         Xml::closeElement( 'fieldset' ) .
1745                         Html::hidden(
1746                                 'wpEditToken',
1747                                 $user->getEditToken( [ 'delete', $title->getPrefixedText() ] )
1748                         ) .
1749                         Xml::closeElement( 'form' );
1750
1751                         if ( $user->isAllowed( 'editinterface' ) ) {
1752                                 $link = Linker::linkKnown(
1753                                         $ctx->msg( 'deletereason-dropdown' )->inContentLanguage()->getTitle(),
1754                                         wfMessage( 'delete-edit-reasonlist' )->escaped(),
1755                                         [],
1756                                         [ 'action' => 'edit' ]
1757                                 );
1758                                 $form .= '<p class="mw-delete-editreasons">' . $link . '</p>';
1759                         }
1760
1761                 $outputPage->addHTML( $form );
1762
1763                 $deleteLogPage = new LogPage( 'delete' );
1764                 $outputPage->addHTML( Xml::element( 'h2', null, $deleteLogPage->getName()->text() ) );
1765                 LogEventsList::showLogExtract( $outputPage, 'delete', $title );
1766         }
1767
1768         /**
1769          * Perform a deletion and output success or failure messages
1770          * @param string $reason
1771          * @param bool $suppress
1772          */
1773         public function doDelete( $reason, $suppress = false ) {
1774                 $error = '';
1775                 $context = $this->getContext();
1776                 $outputPage = $context->getOutput();
1777                 $user = $context->getUser();
1778                 $status = $this->mPage->doDeleteArticleReal( $reason, $suppress, 0, true, $error, $user );
1779
1780                 if ( $status->isGood() ) {
1781                         $deleted = $this->getTitle()->getPrefixedText();
1782
1783                         $outputPage->setPageTitle( wfMessage( 'actioncomplete' ) );
1784                         $outputPage->setRobotPolicy( 'noindex,nofollow' );
1785
1786                         $loglink = '[[Special:Log/delete|' . wfMessage( 'deletionlog' )->text() . ']]';
1787
1788                         $outputPage->addWikiMsg( 'deletedtext', wfEscapeWikiText( $deleted ), $loglink );
1789
1790                         Hooks::run( 'ArticleDeleteAfterSuccess', [ $this->getTitle(), $outputPage ] );
1791
1792                         $outputPage->returnToMain( false );
1793                 } else {
1794                         $outputPage->setPageTitle(
1795                                 wfMessage( 'cannotdelete-title',
1796                                         $this->getTitle()->getPrefixedText() )
1797                         );
1798
1799                         if ( $error == '' ) {
1800                                 $outputPage->addWikiText(
1801                                         "<div class=\"error mw-error-cannotdelete\">\n" . $status->getWikiText() . "\n</div>"
1802                                 );
1803                                 $deleteLogPage = new LogPage( 'delete' );
1804                                 $outputPage->addHTML( Xml::element( 'h2', null, $deleteLogPage->getName()->text() ) );
1805
1806                                 LogEventsList::showLogExtract(
1807                                         $outputPage,
1808                                         'delete',
1809                                         $this->getTitle()
1810                                 );
1811                         } else {
1812                                 $outputPage->addHTML( $error );
1813                         }
1814                 }
1815         }
1816
1817         /* Caching functions */
1818
1819         /**
1820          * checkLastModified returns true if it has taken care of all
1821          * output to the client that is necessary for this request.
1822          * (that is, it has sent a cached version of the page)
1823          *
1824          * @return bool True if cached version send, false otherwise
1825          */
1826         protected function tryFileCache() {
1827                 static $called = false;
1828
1829                 if ( $called ) {
1830                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
1831                         return false;
1832                 }
1833
1834                 $called = true;
1835                 if ( $this->isFileCacheable() ) {
1836                         $cache = new HTMLFileCache( $this->getTitle(), 'view' );
1837                         if ( $cache->isCacheGood( $this->mPage->getTouched() ) ) {
1838                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
1839                                 $cache->loadFromFileCache( $this->getContext() );
1840                                 return true;
1841                         } else {
1842                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
1843                                 ob_start( [ &$cache, 'saveToFileCache' ] );
1844                         }
1845                 } else {
1846                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
1847                 }
1848
1849                 return false;
1850         }
1851
1852         /**
1853          * Check if the page can be cached
1854          * @param integer $mode One of the HTMLFileCache::MODE_* constants (since 1.28)
1855          * @return bool
1856          */
1857         public function isFileCacheable( $mode = HTMLFileCache::MODE_NORMAL ) {
1858                 $cacheable = false;
1859
1860                 if ( HTMLFileCache::useFileCache( $this->getContext(), $mode ) ) {
1861                         $cacheable = $this->mPage->getId()
1862                                 && !$this->mRedirectedFrom && !$this->getTitle()->isRedirect();
1863                         // Extension may have reason to disable file caching on some pages.
1864                         if ( $cacheable ) {
1865                                 // Avoid PHP 7.1 warning of passing $this by reference
1866                                 $articlePage = $this;
1867                                 $cacheable = Hooks::run( 'IsFileCacheable', [ &$articlePage ] );
1868                         }
1869                 }
1870
1871                 return $cacheable;
1872         }
1873
1874         /**#@-*/
1875
1876         /**
1877          * Lightweight method to get the parser output for a page, checking the parser cache
1878          * and so on. Doesn't consider most of the stuff that WikiPage::view is forced to
1879          * consider, so it's not appropriate to use there.
1880          *
1881          * @since 1.16 (r52326) for LiquidThreads
1882          *
1883          * @param int|null $oldid Revision ID or null
1884          * @param User $user The relevant user
1885          * @return ParserOutput|bool ParserOutput or false if the given revision ID is not found
1886          */
1887         public function getParserOutput( $oldid = null, User $user = null ) {
1888                 // XXX: bypasses mParserOptions and thus setParserOptions()
1889
1890                 if ( $user === null ) {
1891                         $parserOptions = $this->getParserOptions();
1892                 } else {
1893                         $parserOptions = $this->mPage->makeParserOptions( $user );
1894                 }
1895
1896                 return $this->mPage->getParserOutput( $parserOptions, $oldid );
1897         }
1898
1899         /**
1900          * Override the ParserOptions used to render the primary article wikitext.
1901          *
1902          * @param ParserOptions $options
1903          * @throws MWException If the parser options where already initialized.
1904          */
1905         public function setParserOptions( ParserOptions $options ) {
1906                 if ( $this->mParserOptions ) {
1907                         throw new MWException( "can't change parser options after they have already been set" );
1908                 }
1909
1910                 // clone, so if $options is modified later, it doesn't confuse the parser cache.
1911                 $this->mParserOptions = clone $options;
1912         }
1913
1914         /**
1915          * Get parser options suitable for rendering the primary article wikitext
1916          * @return ParserOptions
1917          */
1918         public function getParserOptions() {
1919                 if ( !$this->mParserOptions ) {
1920                         $this->mParserOptions = $this->mPage->makeParserOptions( $this->getContext() );
1921                 }
1922                 // Clone to allow modifications of the return value without affecting cache
1923                 return clone $this->mParserOptions;
1924         }
1925
1926         /**
1927          * Sets the context this Article is executed in
1928          *
1929          * @param IContextSource $context
1930          * @since 1.18
1931          */
1932         public function setContext( $context ) {
1933                 $this->mContext = $context;
1934         }
1935
1936         /**
1937          * Gets the context this Article is executed in
1938          *
1939          * @return IContextSource
1940          * @since 1.18
1941          */
1942         public function getContext() {
1943                 if ( $this->mContext instanceof IContextSource ) {
1944                         return $this->mContext;
1945                 } else {
1946                         wfDebug( __METHOD__ . " called and \$mContext is null. " .
1947                                 "Return RequestContext::getMain(); for sanity\n" );
1948                         return RequestContext::getMain();
1949                 }
1950         }
1951
1952         /**
1953          * Use PHP's magic __get handler to handle accessing of
1954          * raw WikiPage fields for backwards compatibility.
1955          *
1956          * @param string $fname Field name
1957          * @return mixed
1958          */
1959         public function __get( $fname ) {
1960                 if ( property_exists( $this->mPage, $fname ) ) {
1961                         # wfWarn( "Access to raw $fname field " . __CLASS__ );
1962                         return $this->mPage->$fname;
1963                 }
1964                 trigger_error( 'Inaccessible property via __get(): ' . $fname, E_USER_NOTICE );
1965         }
1966
1967         /**
1968          * Use PHP's magic __set handler to handle setting of
1969          * raw WikiPage fields for backwards compatibility.
1970          *
1971          * @param string $fname Field name
1972          * @param mixed $fvalue New value
1973          */
1974         public function __set( $fname, $fvalue ) {
1975                 if ( property_exists( $this->mPage, $fname ) ) {
1976                         # wfWarn( "Access to raw $fname field of " . __CLASS__ );
1977                         $this->mPage->$fname = $fvalue;
1978                 // Note: extensions may want to toss on new fields
1979                 } elseif ( !in_array( $fname, [ 'mContext', 'mPage' ] ) ) {
1980                         $this->mPage->$fname = $fvalue;
1981                 } else {
1982                         trigger_error( 'Inaccessible property via __set(): ' . $fname, E_USER_NOTICE );
1983                 }
1984         }
1985
1986         /**
1987          * Call to WikiPage function for backwards compatibility.
1988          * @see WikiPage::checkFlags
1989          */
1990         public function checkFlags( $flags ) {
1991                 return $this->mPage->checkFlags( $flags );
1992         }
1993
1994         /**
1995          * Call to WikiPage function for backwards compatibility.
1996          * @see WikiPage::checkTouched
1997          */
1998         public function checkTouched() {
1999                 return $this->mPage->checkTouched();
2000         }
2001
2002         /**
2003          * Call to WikiPage function for backwards compatibility.
2004          * @see WikiPage::clearPreparedEdit
2005          */
2006         public function clearPreparedEdit() {
2007                 $this->mPage->clearPreparedEdit();
2008         }
2009
2010         /**
2011          * Call to WikiPage function for backwards compatibility.
2012          * @see WikiPage::doDeleteArticleReal
2013          */
2014         public function doDeleteArticleReal(
2015                 $reason, $suppress = false, $u1 = null, $u2 = null, &$error = '', User $user = null,
2016                 $tags = []
2017         ) {
2018                 return $this->mPage->doDeleteArticleReal(
2019                         $reason, $suppress, $u1, $u2, $error, $user, $tags
2020                 );
2021         }
2022
2023         /**
2024          * Call to WikiPage function for backwards compatibility.
2025          * @see WikiPage::doDeleteUpdates
2026          */
2027         public function doDeleteUpdates( $id, Content $content = null ) {
2028                 return $this->mPage->doDeleteUpdates( $id, $content );
2029         }
2030
2031         /**
2032          * Call to WikiPage function for backwards compatibility.
2033          * @deprecated since 1.29. Use WikiPage::doEditContent() directly instead
2034          * @see WikiPage::doEditContent
2035          */
2036         public function doEditContent( Content $content, $summary, $flags = 0, $baseRevId = false,
2037                 User $user = null, $serialFormat = null
2038         ) {
2039                 wfDeprecated( __METHOD__, '1.29' );
2040                 return $this->mPage->doEditContent( $content, $summary, $flags, $baseRevId,
2041                         $user, $serialFormat
2042                 );
2043         }
2044
2045         /**
2046          * Call to WikiPage function for backwards compatibility.
2047          * @see WikiPage::doEditUpdates
2048          */
2049         public function doEditUpdates( Revision $revision, User $user, array $options = [] ) {
2050                 return $this->mPage->doEditUpdates( $revision, $user, $options );
2051         }
2052
2053         /**
2054          * Call to WikiPage function for backwards compatibility.
2055          * @see WikiPage::doPurge
2056          * @note In 1.28 (and only 1.28), this took a $flags parameter that
2057          *  controlled how much purging was done.
2058          */
2059         public function doPurge() {
2060                 return $this->mPage->doPurge();
2061         }
2062
2063         /**
2064          * Call to WikiPage function for backwards compatibility.
2065          * @see WikiPage::getLastPurgeTimestamp
2066          * @deprecated since 1.29
2067          */
2068         public function getLastPurgeTimestamp() {
2069                 wfDeprecated( __METHOD__, '1.29' );
2070                 return $this->mPage->getLastPurgeTimestamp();
2071         }
2072
2073         /**
2074          * Call to WikiPage function for backwards compatibility.
2075          * @see WikiPage::doViewUpdates
2076          */
2077         public function doViewUpdates( User $user, $oldid = 0 ) {
2078                 $this->mPage->doViewUpdates( $user, $oldid );
2079         }
2080
2081         /**
2082          * Call to WikiPage function for backwards compatibility.
2083          * @see WikiPage::exists
2084          */
2085         public function exists() {
2086                 return $this->mPage->exists();
2087         }
2088
2089         /**
2090          * Call to WikiPage function for backwards compatibility.
2091          * @see WikiPage::followRedirect
2092          */
2093         public function followRedirect() {
2094                 return $this->mPage->followRedirect();
2095         }
2096
2097         /**
2098          * Call to WikiPage function for backwards compatibility.
2099          * @see ContentHandler::getActionOverrides
2100          */
2101         public function getActionOverrides() {
2102                 return $this->mPage->getActionOverrides();
2103         }
2104
2105         /**
2106          * Call to WikiPage function for backwards compatibility.
2107          * @see WikiPage::getAutoDeleteReason
2108          */
2109         public function getAutoDeleteReason( &$hasHistory ) {
2110                 return $this->mPage->getAutoDeleteReason( $hasHistory );
2111         }
2112
2113         /**
2114          * Call to WikiPage function for backwards compatibility.
2115          * @see WikiPage::getCategories
2116          */
2117         public function getCategories() {
2118                 return $this->mPage->getCategories();
2119         }
2120
2121         /**
2122          * Call to WikiPage function for backwards compatibility.
2123          * @see WikiPage::getComment
2124          */
2125         public function getComment( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2126                 return $this->mPage->getComment( $audience, $user );
2127         }
2128
2129         /**
2130          * Call to WikiPage function for backwards compatibility.
2131          * @see WikiPage::getContentHandler
2132          */
2133         public function getContentHandler() {
2134                 return $this->mPage->getContentHandler();
2135         }
2136
2137         /**
2138          * Call to WikiPage function for backwards compatibility.
2139          * @see WikiPage::getContentModel
2140          */
2141         public function getContentModel() {
2142                 return $this->mPage->getContentModel();
2143         }
2144
2145         /**
2146          * Call to WikiPage function for backwards compatibility.
2147          * @see WikiPage::getContributors
2148          */
2149         public function getContributors() {
2150                 return $this->mPage->getContributors();
2151         }
2152
2153         /**
2154          * Call to WikiPage function for backwards compatibility.
2155          * @see WikiPage::getCreator
2156          */
2157         public function getCreator( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2158                 return $this->mPage->getCreator( $audience, $user );
2159         }
2160
2161         /**
2162          * Call to WikiPage function for backwards compatibility.
2163          * @see WikiPage::getDeletionUpdates
2164          */
2165         public function getDeletionUpdates( Content $content = null ) {
2166                 return $this->mPage->getDeletionUpdates( $content );
2167         }
2168
2169         /**
2170          * Call to WikiPage function for backwards compatibility.
2171          * @see WikiPage::getHiddenCategories
2172          */
2173         public function getHiddenCategories() {
2174                 return $this->mPage->getHiddenCategories();
2175         }
2176
2177         /**
2178          * Call to WikiPage function for backwards compatibility.
2179          * @see WikiPage::getId
2180          */
2181         public function getId() {
2182                 return $this->mPage->getId();
2183         }
2184
2185         /**
2186          * Call to WikiPage function for backwards compatibility.
2187          * @see WikiPage::getLatest
2188          */
2189         public function getLatest() {
2190                 return $this->mPage->getLatest();
2191         }
2192
2193         /**
2194          * Call to WikiPage function for backwards compatibility.
2195          * @see WikiPage::getLinksTimestamp
2196          */
2197         public function getLinksTimestamp() {
2198                 return $this->mPage->getLinksTimestamp();
2199         }
2200
2201         /**
2202          * Call to WikiPage function for backwards compatibility.
2203          * @see WikiPage::getMinorEdit
2204          */
2205         public function getMinorEdit() {
2206                 return $this->mPage->getMinorEdit();
2207         }
2208
2209         /**
2210          * Call to WikiPage function for backwards compatibility.
2211          * @see WikiPage::getOldestRevision
2212          */
2213         public function getOldestRevision() {
2214                 return $this->mPage->getOldestRevision();
2215         }
2216
2217         /**
2218          * Call to WikiPage function for backwards compatibility.
2219          * @see WikiPage::getRedirectTarget
2220          */
2221         public function getRedirectTarget() {
2222                 return $this->mPage->getRedirectTarget();
2223         }
2224
2225         /**
2226          * Call to WikiPage function for backwards compatibility.
2227          * @see WikiPage::getRedirectURL
2228          */
2229         public function getRedirectURL( $rt ) {
2230                 return $this->mPage->getRedirectURL( $rt );
2231         }
2232
2233         /**
2234          * Call to WikiPage function for backwards compatibility.
2235          * @see WikiPage::getRevision
2236          */
2237         public function getRevision() {
2238                 return $this->mPage->getRevision();
2239         }
2240
2241         /**
2242          * Call to WikiPage function for backwards compatibility.
2243          * @see WikiPage::getTimestamp
2244          */
2245         public function getTimestamp() {
2246                 return $this->mPage->getTimestamp();
2247         }
2248
2249         /**
2250          * Call to WikiPage function for backwards compatibility.
2251          * @see WikiPage::getTouched
2252          */
2253         public function getTouched() {
2254                 return $this->mPage->getTouched();
2255         }
2256
2257         /**
2258          * Call to WikiPage function for backwards compatibility.
2259          * @see WikiPage::getUndoContent
2260          */
2261         public function getUndoContent( Revision $undo, Revision $undoafter = null ) {
2262                 return $this->mPage->getUndoContent( $undo, $undoafter );
2263         }
2264
2265         /**
2266          * Call to WikiPage function for backwards compatibility.
2267          * @see WikiPage::getUser
2268          */
2269         public function getUser( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2270                 return $this->mPage->getUser( $audience, $user );
2271         }
2272
2273         /**
2274          * Call to WikiPage function for backwards compatibility.
2275          * @see WikiPage::getUserText
2276          */
2277         public function getUserText( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2278                 return $this->mPage->getUserText( $audience, $user );
2279         }
2280
2281         /**
2282          * Call to WikiPage function for backwards compatibility.
2283          * @see WikiPage::hasViewableContent
2284          */
2285         public function hasViewableContent() {
2286                 return $this->mPage->hasViewableContent();
2287         }
2288
2289         /**
2290          * Call to WikiPage function for backwards compatibility.
2291          * @see WikiPage::insertOn
2292          */
2293         public function insertOn( $dbw, $pageId = null ) {
2294                 return $this->mPage->insertOn( $dbw, $pageId );
2295         }
2296
2297         /**
2298          * Call to WikiPage function for backwards compatibility.
2299          * @see WikiPage::insertProtectNullRevision
2300          */
2301         public function insertProtectNullRevision( $revCommentMsg, array $limit,
2302                 array $expiry, $cascade, $reason, $user = null
2303         ) {
2304                 return $this->mPage->insertProtectNullRevision( $revCommentMsg, $limit,
2305                         $expiry, $cascade, $reason, $user
2306                 );
2307         }
2308
2309         /**
2310          * Call to WikiPage function for backwards compatibility.
2311          * @see WikiPage::insertRedirect
2312          */
2313         public function insertRedirect() {
2314                 return $this->mPage->insertRedirect();
2315         }
2316
2317         /**
2318          * Call to WikiPage function for backwards compatibility.
2319          * @see WikiPage::insertRedirectEntry
2320          */
2321         public function insertRedirectEntry( Title $rt, $oldLatest = null ) {
2322                 return $this->mPage->insertRedirectEntry( $rt, $oldLatest );
2323         }
2324
2325         /**
2326          * Call to WikiPage function for backwards compatibility.
2327          * @see WikiPage::isCountable
2328          */
2329         public function isCountable( $editInfo = false ) {
2330                 return $this->mPage->isCountable( $editInfo );
2331         }
2332
2333         /**
2334          * Call to WikiPage function for backwards compatibility.
2335          * @see WikiPage::isRedirect
2336          */
2337         public function isRedirect() {
2338                 return $this->mPage->isRedirect();
2339         }
2340
2341         /**
2342          * Call to WikiPage function for backwards compatibility.
2343          * @see WikiPage::loadFromRow
2344          */
2345         public function loadFromRow( $data, $from ) {
2346                 return $this->mPage->loadFromRow( $data, $from );
2347         }
2348
2349         /**
2350          * Call to WikiPage function for backwards compatibility.
2351          * @see WikiPage::loadPageData
2352          */
2353         public function loadPageData( $from = 'fromdb' ) {
2354                 $this->mPage->loadPageData( $from );
2355         }
2356
2357         /**
2358          * Call to WikiPage function for backwards compatibility.
2359          * @see WikiPage::lockAndGetLatest
2360          */
2361         public function lockAndGetLatest() {
2362                 return $this->mPage->lockAndGetLatest();
2363         }
2364
2365         /**
2366          * Call to WikiPage function for backwards compatibility.
2367          * @see WikiPage::makeParserOptions
2368          */
2369         public function makeParserOptions( $context ) {
2370                 return $this->mPage->makeParserOptions( $context );
2371         }
2372
2373         /**
2374          * Call to WikiPage function for backwards compatibility.
2375          * @see WikiPage::pageDataFromId
2376          */
2377         public function pageDataFromId( $dbr, $id, $options = [] ) {
2378                 return $this->mPage->pageDataFromId( $dbr, $id, $options );
2379         }
2380
2381         /**
2382          * Call to WikiPage function for backwards compatibility.
2383          * @see WikiPage::pageDataFromTitle
2384          */
2385         public function pageDataFromTitle( $dbr, $title, $options = [] ) {
2386                 return $this->mPage->pageDataFromTitle( $dbr, $title, $options );
2387         }
2388
2389         /**
2390          * Call to WikiPage function for backwards compatibility.
2391          * @see WikiPage::prepareContentForEdit
2392          */
2393         public function prepareContentForEdit(
2394                 Content $content, $revision = null, User $user = null,
2395                 $serialFormat = null, $useCache = true
2396         ) {
2397                 return $this->mPage->prepareContentForEdit(
2398                         $content, $revision, $user,
2399                         $serialFormat, $useCache
2400                 );
2401         }
2402
2403         /**
2404          * Call to WikiPage function for backwards compatibility.
2405          * @see WikiPage::protectDescription
2406          */
2407         public function protectDescription( array $limit, array $expiry ) {
2408                 return $this->mPage->protectDescription( $limit, $expiry );
2409         }
2410
2411         /**
2412          * Call to WikiPage function for backwards compatibility.
2413          * @see WikiPage::protectDescriptionLog
2414          */
2415         public function protectDescriptionLog( array $limit, array $expiry ) {
2416                 return $this->mPage->protectDescriptionLog( $limit, $expiry );
2417         }
2418
2419         /**
2420          * Call to WikiPage function for backwards compatibility.
2421          * @see WikiPage::replaceSectionAtRev
2422          */
2423         public function replaceSectionAtRev( $sectionId, Content $sectionContent,
2424                 $sectionTitle = '', $baseRevId = null
2425         ) {
2426                 return $this->mPage->replaceSectionAtRev( $sectionId, $sectionContent,
2427                         $sectionTitle, $baseRevId
2428                 );
2429         }
2430
2431         /**
2432          * Call to WikiPage function for backwards compatibility.
2433          * @see WikiPage::replaceSectionContent
2434          */
2435         public function replaceSectionContent(
2436                 $sectionId, Content $sectionContent, $sectionTitle = '', $edittime = null
2437         ) {
2438                 return $this->mPage->replaceSectionContent(
2439                         $sectionId, $sectionContent, $sectionTitle, $edittime
2440                 );
2441         }
2442
2443         /**
2444          * Call to WikiPage function for backwards compatibility.
2445          * @see WikiPage::setTimestamp
2446          */
2447         public function setTimestamp( $ts ) {
2448                 return $this->mPage->setTimestamp( $ts );
2449         }
2450
2451         /**
2452          * Call to WikiPage function for backwards compatibility.
2453          * @see WikiPage::shouldCheckParserCache
2454          */
2455         public function shouldCheckParserCache( ParserOptions $parserOptions, $oldId ) {
2456                 return $this->mPage->shouldCheckParserCache( $parserOptions, $oldId );
2457         }
2458
2459         /**
2460          * Call to WikiPage function for backwards compatibility.
2461          * @see WikiPage::supportsSections
2462          */
2463         public function supportsSections() {
2464                 return $this->mPage->supportsSections();
2465         }
2466
2467         /**
2468          * Call to WikiPage function for backwards compatibility.
2469          * @see WikiPage::triggerOpportunisticLinksUpdate
2470          */
2471         public function triggerOpportunisticLinksUpdate( ParserOutput $parserOutput ) {
2472                 return $this->mPage->triggerOpportunisticLinksUpdate( $parserOutput );
2473         }
2474
2475         /**
2476          * Call to WikiPage function for backwards compatibility.
2477          * @see WikiPage::updateCategoryCounts
2478          */
2479         public function updateCategoryCounts( array $added, array $deleted, $id = 0 ) {
2480                 return $this->mPage->updateCategoryCounts( $added, $deleted, $id );
2481         }
2482
2483         /**
2484          * Call to WikiPage function for backwards compatibility.
2485          * @see WikiPage::updateIfNewerOn
2486          */
2487         public function updateIfNewerOn( $dbw, $revision ) {
2488                 return $this->mPage->updateIfNewerOn( $dbw, $revision );
2489         }
2490
2491         /**
2492          * Call to WikiPage function for backwards compatibility.
2493          * @see WikiPage::updateRedirectOn
2494          */
2495         public function updateRedirectOn( $dbw, $redirectTitle, $lastRevIsRedirect = null ) {
2496                 return $this->mPage->updateRedirectOn( $dbw, $redirectTitle, $lastRevIsRedirect = null );
2497         }
2498
2499         /**
2500          * Call to WikiPage function for backwards compatibility.
2501          * @see WikiPage::updateRevisionOn
2502          */
2503         public function updateRevisionOn( $dbw, $revision, $lastRevision = null,
2504                 $lastRevIsRedirect = null
2505         ) {
2506                 return $this->mPage->updateRevisionOn( $dbw, $revision, $lastRevision,
2507                         $lastRevIsRedirect
2508                 );
2509         }
2510
2511         /**
2512          * @param array $limit
2513          * @param array $expiry
2514          * @param bool $cascade
2515          * @param string $reason
2516          * @param User $user
2517          * @return Status
2518          */
2519         public function doUpdateRestrictions( array $limit, array $expiry, &$cascade,
2520                 $reason, User $user
2521         ) {
2522                 return $this->mPage->doUpdateRestrictions( $limit, $expiry, $cascade, $reason, $user );
2523         }
2524
2525         /**
2526          * @param array $limit
2527          * @param string $reason
2528          * @param int $cascade
2529          * @param array $expiry
2530          * @return bool
2531          */
2532         public function updateRestrictions( $limit = [], $reason = '',
2533                 &$cascade = 0, $expiry = []
2534         ) {
2535                 return $this->mPage->doUpdateRestrictions(
2536                         $limit,
2537                         $expiry,
2538                         $cascade,
2539                         $reason,
2540                         $this->getContext()->getUser()
2541                 );
2542         }
2543
2544         /**
2545          * @param string $reason
2546          * @param bool $suppress
2547          * @param int $u1 Unused
2548          * @param bool $u2 Unused
2549          * @param string $error
2550          * @return bool
2551          */
2552         public function doDeleteArticle(
2553                 $reason, $suppress = false, $u1 = null, $u2 = null, &$error = ''
2554         ) {
2555                 return $this->mPage->doDeleteArticle( $reason, $suppress, $u1, $u2, $error );
2556         }
2557
2558         /**
2559          * @param string $fromP
2560          * @param string $summary
2561          * @param string $token
2562          * @param bool $bot
2563          * @param array $resultDetails
2564          * @param User|null $user
2565          * @return array
2566          */
2567         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails, User $user = null ) {
2568                 $user = is_null( $user ) ? $this->getContext()->getUser() : $user;
2569                 return $this->mPage->doRollback( $fromP, $summary, $token, $bot, $resultDetails, $user );
2570         }
2571
2572         /**
2573          * @param string $fromP
2574          * @param string $summary
2575          * @param bool $bot
2576          * @param array $resultDetails
2577          * @param User|null $guser
2578          * @return array
2579          */
2580         public function commitRollback( $fromP, $summary, $bot, &$resultDetails, User $guser = null ) {
2581                 $guser = is_null( $guser ) ? $this->getContext()->getUser() : $guser;
2582                 return $this->mPage->commitRollback( $fromP, $summary, $bot, $resultDetails, $guser );
2583         }
2584
2585         /**
2586          * @param bool $hasHistory
2587          * @return mixed
2588          */
2589         public function generateReason( &$hasHistory ) {
2590                 $title = $this->mPage->getTitle();
2591                 $handler = ContentHandler::getForTitle( $title );
2592                 return $handler->getAutoDeleteReason( $title, $hasHistory );
2593         }
2594
2595         /**
2596          * @return array
2597          *
2598          * @deprecated since 1.24, use WikiPage::selectFields() instead
2599          */
2600         public static function selectFields() {
2601                 wfDeprecated( __METHOD__, '1.24' );
2602                 return WikiPage::selectFields();
2603         }
2604
2605         /**
2606          * @param Title $title
2607          *
2608          * @deprecated since 1.24, use WikiPage::onArticleCreate() instead
2609          */
2610         public static function onArticleCreate( $title ) {
2611                 wfDeprecated( __METHOD__, '1.24' );
2612                 WikiPage::onArticleCreate( $title );
2613         }
2614
2615         /**
2616          * @param Title $title
2617          *
2618          * @deprecated since 1.24, use WikiPage::onArticleDelete() instead
2619          */
2620         public static function onArticleDelete( $title ) {
2621                 wfDeprecated( __METHOD__, '1.24' );
2622                 WikiPage::onArticleDelete( $title );
2623         }
2624
2625         /**
2626          * @param Title $title
2627          *
2628          * @deprecated since 1.24, use WikiPage::onArticleEdit() instead
2629          */
2630         public static function onArticleEdit( $title ) {
2631                 wfDeprecated( __METHOD__, '1.24' );
2632                 WikiPage::onArticleEdit( $title );
2633         }
2634
2635         // ******
2636 }