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