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          * @var bool Whether render() was called. With the way subclasses work
  80          * here, there doesn't seem to be any other way to stop calling
  81          * OutputPage::enableSectionEditLinks() and still have it work as it did before.
  82          */
  83         private $disableSectionEditForRender = false;
  84
  85         /**
  86          * Constructor and clear the article
  87          * @param Title $title Reference to a Title object.
  88          * @param int $oldId Revision ID, null to fetch from request, zero for current
  89          */
  90         public function __construct( Title $title, $oldId = null ) {
  91                 $this->mOldId = $oldId;
  92                 $this->mPage = $this->newPage( $title );
  93         }
  94
  95         /**
  96          * @param Title $title
  97          * @return WikiPage
  98          */
  99         protected function newPage( Title $title ) {
 100                 return new WikiPage( $title );
 101         }
 102
 103         /**
 104          * Constructor from a page id
 105          * @param int $id Article ID to load
 106          * @return Article|null
 107          */
 108         public static function newFromID( $id ) {
 109                 $t = Title::newFromID( $id );
 110                 return $t == null ? null : new static( $t );
 111         }
 112
 113         /**
 114          * Create an Article object of the appropriate class for the given page.
 115          *
 116          * @param Title $title
 117          * @param IContextSource $context
 118          * @return Article
 119          */
 120         public static function newFromTitle( $title, IContextSource $context ) {
 121                 if ( NS_MEDIA == $title->getNamespace() ) {
 122                         // FIXME: where should this go?
 123                         $title = Title::makeTitle( NS_FILE, $title->getDBkey() );
 124                 }
 125
 126                 $page = null;
 127                 Hooks::run( 'ArticleFromTitle', [ &$title, &$page, $context ] );
 128                 if ( !$page ) {
 129                         switch ( $title->getNamespace() ) {
 130                                 case NS_FILE:
 131                                         $page = new ImagePage( $title );
 132                                         break;
 133                                 case NS_CATEGORY:
 134                                         $page = new CategoryPage( $title );
 135                                         break;
 136                                 default:
 137                                         $page = new Article( $title );
 138                         }
 139                 }
 140                 $page->setContext( $context );
 141
 142                 return $page;
 143         }
 144
 145         /**
 146          * Create an Article object of the appropriate class for the given page.
 147          *
 148          * @param WikiPage $page
 149          * @param IContextSource $context
 150          * @return Article
 151          */
 152         public static function newFromWikiPage( WikiPage $page, IContextSource $context ) {
 153                 $article = self::newFromTitle( $page->getTitle(), $context );
 154                 $article->mPage = $page; // override to keep process cached vars
 155                 return $article;
 156         }
 157
 158         /**
 159          * Get the page this view was redirected from
 160          * @return Title|null
 161          * @since 1.28
 162          */
 163         public function getRedirectedFrom() {
 164                 return $this->mRedirectedFrom;
 165         }
 166
 167         /**
 168          * Tell the page view functions that this view was redirected
 169          * from another page on the wiki.
 170          * @param Title $from
 171          */
 172         public function setRedirectedFrom( Title $from ) {
 173                 $this->mRedirectedFrom = $from;
 174         }
 175
 176         /**
 177          * Get the title object of the article
 178          *
 179          * @return Title Title object of this page
 180          */
 181         public function getTitle() {
 182                 return $this->mPage->getTitle();
 183         }
 184
 185         /**
 186          * Get the WikiPage object of this instance
 187          *
 188          * @since 1.19
 189          * @return WikiPage
 190          */
 191         public function getPage() {
 192                 return $this->mPage;
 193         }
 194
 195         /**
 196          * Clear the object
 197          */
 198         public function clear() {
 199                 $this->mContentLoaded = false;
 200
 201                 $this->mRedirectedFrom = null; # Title object if set
 202                 $this->mRevIdFetched = 0;
 203                 $this->mRedirectUrl = false;
 204
 205                 $this->mPage->clear();
 206         }
 207
 208         /**
 209          * Returns a Content object representing the pages effective display content,
 210          * not necessarily the revision's content!
 211          *
 212          * Note that getContent does not follow redirects anymore.
 213          * If you need to fetch redirectable content easily, try
 214          * the shortcut in WikiPage::getRedirectTarget()
 215          *
 216          * This function has side effects! Do not use this function if you
 217          * only want the real revision text if any.
 218          *
 219          * @return Content Return the content of this revision
 220          *
 221          * @since 1.21
 222          */
 223         protected function getContentObject() {
 224                 if ( $this->mPage->getId() === 0 ) {
 225                         # If this is a MediaWiki:x message, then load the messages
 226                         # and return the message value for x.
 227                         if ( $this->getTitle()->getNamespace() == NS_MEDIAWIKI ) {
 228                                 $text = $this->getTitle()->getDefaultMessageText();
 229                                 if ( $text === false ) {
 230                                         $text = '';
 231                                 }
 232
 233                                 $content = ContentHandler::makeContent( $text, $this->getTitle() );
 234                         } else {
 235                                 $message = $this->getContext()->getUser()->isLoggedIn() ? 'noarticletext' : 'noarticletextanon';
 236                                 $content = new MessageContent( $message, null, 'parsemag' );
 237                         }
 238                 } else {
 239                         $this->fetchContentObject();
 240                         $content = $this->mContentObject;
 241                 }
 242
 243                 return $content;
 244         }
 245
 246         /**
 247          * @return int The oldid of the article that is to be shown, 0 for the current revision
 248          */
 249         public function getOldID() {
 250                 if ( is_null( $this->mOldId ) ) {
 251                         $this->mOldId = $this->getOldIDFromRequest();
 252                 }
 253
 254                 return $this->mOldId;
 255         }
 256
 257         /**
 258          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 259          *
 260          * @return int The old id for the request
 261          */
 262         public function getOldIDFromRequest() {
 263                 $this->mRedirectUrl = false;
 264
 265                 $request = $this->getContext()->getRequest();
 266                 $oldid = $request->getIntOrNull( 'oldid' );
 267
 268                 if ( $oldid === null ) {
 269                         return 0;
 270                 }
 271
 272                 if ( $oldid !== 0 ) {
 273                         # Load the given revision and check whether the page is another one.
 274                         # In that case, update this instance to reflect the change.
 275                         if ( $oldid === $this->mPage->getLatest() ) {
 276                                 $this->mRevision = $this->mPage->getRevision();
 277                         } else {
 278                                 $this->mRevision = Revision::newFromId( $oldid );
 279                                 if ( $this->mRevision !== null ) {
 280                                         // Revision title doesn't match the page title given?
 281                                         if ( $this->mPage->getId() != $this->mRevision->getPage() ) {
 282                                                 $function = [ get_class( $this->mPage ), 'newFromID' ];
 283                                                 $this->mPage = call_user_func( $function, $this->mRevision->getPage() );
 284                                         }
 285                                 }
 286                         }
 287                 }
 288
 289                 if ( $request->getVal( 'direction' ) == 'next' ) {
 290                         $nextid = $this->getTitle()->getNextRevisionID( $oldid );
 291                         if ( $nextid ) {
 292                                 $oldid = $nextid;
 293                                 $this->mRevision = null;
 294                         } else {
 295                                 $this->mRedirectUrl = $this->getTitle()->getFullURL( 'redirect=no' );
 296                         }
 297                 } elseif ( $request->getVal( 'direction' ) == 'prev' ) {
 298                         $previd = $this->getTitle()->getPreviousRevisionID( $oldid );
 299                         if ( $previd ) {
 300                                 $oldid = $previd;
 301                                 $this->mRevision = null;
 302                         }
 303                 }
 304
 305                 return $oldid;
 306         }
 307
 308         /**
 309          * Get text content object
 310          * Does *NOT* follow redirects.
 311          * @todo When is this null?
 312          *
 313          * @note Code that wants to retrieve page content from the database should
 314          * use WikiPage::getContent().
 315          *
 316          * @return Content|null|bool
 317          *
 318          * @since 1.21
 319          */
 320         protected function fetchContentObject() {
 321                 if ( $this->mContentLoaded ) {
 322                         return $this->mContentObject;
 323                 }
 324
 325                 $this->mContentLoaded = true;
 326                 $this->mContent = null;
 327
 328                 $oldid = $this->getOldID();
 329
 330                 # Pre-fill content with error message so that if something
 331                 # fails we'll have something telling us what we intended.
 332                 // XXX: this isn't page content but a UI message. horrible.
 333                 $this->mContentObject = new MessageContent( 'missing-revision', [ $oldid ] );
 334
 335                 if ( $oldid ) {
 336                         # $this->mRevision might already be fetched by getOldIDFromRequest()
 337                         if ( !$this->mRevision ) {
 338                                 $this->mRevision = Revision::newFromId( $oldid );
 339                                 if ( !$this->mRevision ) {
 340                                         wfDebug( __METHOD__ . " failed to retrieve specified revision, id $oldid\n" );
 341                                         return false;
 342                                 }
 343                         }
 344                 } else {
 345                         $oldid = $this->mPage->getLatest();
 346                         if ( !$oldid ) {
 347                                 wfDebug( __METHOD__ . " failed to find page data for title " .
 348                                         $this->getTitle()->getPrefixedText() . "\n" );
 349                                 return false;
 350                         }
 351
 352                         # Update error message with correct oldid
 353                         $this->mContentObject = new MessageContent( 'missing-revision', [ $oldid ] );
 354
 355                         $this->mRevision = $this->mPage->getRevision();
 356
 357                         if ( !$this->mRevision ) {
 358                                 wfDebug( __METHOD__ . " failed to retrieve current page, rev_id $oldid\n" );
 359                                 return false;
 360                         }
 361                 }
 362
 363                 // @todo FIXME: Horrible, horrible! This content-loading interface just plain sucks.
 364                 // We should instead work with the Revision object when we need it...
 365                 // Loads if user is allowed
 366                 $content = $this->mRevision->getContent(
 367                         Revision::FOR_THIS_USER,
 368                         $this->getContext()->getUser()
 369                 );
 370
 371                 if ( !$content ) {
 372                         wfDebug( __METHOD__ . " failed to retrieve content of revision " .
 373                                 $this->mRevision->getId() . "\n" );
 374                         return false;
 375                 }
 376
 377                 $this->mContentObject = $content;
 378                 $this->mRevIdFetched = $this->mRevision->getId();
 379
 380                 // Avoid PHP 7.1 warning of passing $this by reference
 381                 $articlePage = $this;
 382
 383                 Hooks::run(
 384                         'ArticleAfterFetchContentObject',
 385                         [ &$articlePage, &$this->mContentObject ]
 386                 );
 387
 388                 return $this->mContentObject;
 389         }
 390
 391         /**
 392          * Returns true if the currently-referenced revision is the current edit
 393          * to this page (and it exists).
 394          * @return bool
 395          */
 396         public function isCurrent() {
 397                 # If no oldid, this is the current version.
 398                 if ( $this->getOldID() == 0 ) {
 399                         return true;
 400                 }
 401
 402                 return $this->mPage->exists() && $this->mRevision && $this->mRevision->isCurrent();
 403         }
 404
 405         /**
 406          * Get the fetched Revision object depending on request parameters or null
 407          * on failure.
 408          *
 409          * @since 1.19
 410          * @return Revision|null
 411          */
 412         public function getRevisionFetched() {
 413                 $this->fetchContentObject();
 414
 415                 return $this->mRevision;
 416         }
 417
 418         /**
 419          * Use this to fetch the rev ID used on page views
 420          *
 421          * @return int Revision ID of last article revision
 422          */
 423         public function getRevIdFetched() {
 424                 if ( $this->mRevIdFetched ) {
 425                         return $this->mRevIdFetched;
 426                 } else {
 427                         return $this->mPage->getLatest();
 428                 }
 429         }
 430
 431         /**
 432          * This is the default action of the index.php entry point: just view the
 433          * page of the given title.
 434          */
 435         public function view() {
 436                 global $wgUseFileCache, $wgDebugToolbar;
 437
 438                 # Get variables from query string
 439                 # As side effect this will load the revision and update the title
 440                 # in a revision ID is passed in the request, so this should remain
 441                 # the first call of this method even if $oldid is used way below.
 442                 $oldid = $this->getOldID();
 443
 444                 $user = $this->getContext()->getUser();
 445                 # Another whitelist check in case getOldID() is altering the title
 446                 $permErrors = $this->getTitle()->getUserPermissionsErrors( 'read', $user );
 447                 if ( count( $permErrors ) ) {
 448                         wfDebug( __METHOD__ . ": denied on secondary read check\n" );
 449                         throw new PermissionsError( 'read', $permErrors );
 450                 }
 451
 452                 $outputPage = $this->getContext()->getOutput();
 453                 # getOldID() may as well want us to redirect somewhere else
 454                 if ( $this->mRedirectUrl ) {
 455                         $outputPage->redirect( $this->mRedirectUrl );
 456                         wfDebug( __METHOD__ . ": redirecting due to oldid\n" );
 457
 458                         return;
 459                 }
 460
 461                 # If we got diff in the query, we want to see a diff page instead of the article.
 462                 if ( $this->getContext()->getRequest()->getCheck( 'diff' ) ) {
 463                         wfDebug( __METHOD__ . ": showing diff page\n" );
 464                         $this->showDiffPage();
 465
 466                         return;
 467                 }
 468
 469                 # Set page title (may be overridden by DISPLAYTITLE)
 470                 $outputPage->setPageTitle( $this->getTitle()->getPrefixedText() );
 471
 472                 $outputPage->setArticleFlag( true );
 473                 # Allow frames by default
 474                 $outputPage->allowClickjacking();
 475
 476                 $parserCache = MediaWikiServices::getInstance()->getParserCache();
 477
 478                 $parserOptions = $this->getParserOptions();
 479                 $poOptions = [];
 480                 # Render printable version, use printable version cache
 481                 if ( $outputPage->isPrintable() ) {
 482                         $parserOptions->setIsPrintable( true );
 483                         $poOptions['enableSectionEditLinks'] = false;
 484                 } elseif ( $this->disableSectionEditForRender
 485                         || !$this->isCurrent() || !$this->getTitle()->quickUserCan( 'edit', $user )
 486                 ) {
 487                         $poOptions['enableSectionEditLinks'] = false;
 488                 }
 489
 490                 # Try client and file cache
 491                 if ( !$wgDebugToolbar && $oldid === 0 && $this->mPage->checkTouched() ) {
 492                         # Try to stream the output from file cache
 493                         if ( $wgUseFileCache && $this->tryFileCache() ) {
 494                                 wfDebug( __METHOD__ . ": done file cache\n" );
 495                                 # tell wgOut that output is taken care of
 496                                 $outputPage->disable();
 497                                 $this->mPage->doViewUpdates( $user, $oldid );
 498
 499                                 return;
 500                         }
 501                 }
 502
 503                 # Should the parser cache be used?
 504                 $useParserCache = $this->mPage->shouldCheckParserCache( $parserOptions, $oldid );
 505                 wfDebug( 'Article::view using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
 506                 if ( $user->getStubThreshold() ) {
 507                         MediaWikiServices::getInstance()->getStatsdDataFactory()->increment( 'pcache_miss_stub' );
 508                 }
 509
 510                 $this->showRedirectedFromHeader();
 511                 $this->showNamespaceHeader();
 512
 513                 # Iterate through the possible ways of constructing the output text.
 514                 # Keep going until $outputDone is set, or we run out of things to do.
 515                 $pass = 0;
 516                 $outputDone = false;
 517                 $this->mParserOutput = false;
 518
 519                 while ( !$outputDone && ++$pass ) {
 520                         switch ( $pass ) {
 521                                 case 1:
 522                                         // Avoid PHP 7.1 warning of passing $this by reference
 523                                         $articlePage = $this;
 524                                         Hooks::run( 'ArticleViewHeader', [ &$articlePage, &$outputDone, &$useParserCache ] );
 525                                         break;
 526                                 case 2:
 527                                         # Early abort if the page doesn't exist
 528                                         if ( !$this->mPage->exists() ) {
 529                                                 wfDebug( __METHOD__ . ": showing missing article\n" );
 530                                                 $this->showMissingArticle();
 531                                                 $this->mPage->doViewUpdates( $user );
 532                                                 return;
 533                                         }
 534
 535                                         # Try the parser cache
 536                                         if ( $useParserCache ) {
 537                                                 $this->mParserOutput = $parserCache->get( $this->mPage, $parserOptions );
 538
 539                                                 if ( $this->mParserOutput !== false ) {
 540                                                         if ( $oldid ) {
 541                                                                 wfDebug( __METHOD__ . ": showing parser cache contents for current rev permalink\n" );
 542                                                                 $this->setOldSubtitle( $oldid );
 543                                                         } else {
 544                                                                 wfDebug( __METHOD__ . ": showing parser cache contents\n" );
 545                                                         }
 546                                                         $outputPage->addParserOutput( $this->mParserOutput, $poOptions );
 547                                                         # Ensure that UI elements requiring revision ID have
 548                                                         # the correct version information.
 549                                                         $outputPage->setRevisionId( $this->mPage->getLatest() );
 550                                                         # Preload timestamp to avoid a DB hit
 551                                                         $cachedTimestamp = $this->mParserOutput->getTimestamp();
 552                                                         if ( $cachedTimestamp !== null ) {
 553                                                                 $outputPage->setRevisionTimestamp( $cachedTimestamp );
 554                                                                 $this->mPage->setTimestamp( $cachedTimestamp );
 555                                                         }
 556                                                         $outputDone = true;
 557                                                 }
 558                                         }
 559                                         break;
 560                                 case 3:
 561                                         # This will set $this->mRevision if needed
 562                                         $this->fetchContentObject();
 563
 564                                         # Are we looking at an old revision
 565                                         if ( $oldid && $this->mRevision ) {
 566                                                 $this->setOldSubtitle( $oldid );
 567
 568                                                 if ( !$this->showDeletedRevisionHeader() ) {
 569                                                         wfDebug( __METHOD__ . ": cannot view deleted revision\n" );
 570                                                         return;
 571                                                 }
 572                                         }
 573
 574                                         # Ensure that UI elements requiring revision ID have
 575                                         # the correct version information.
 576                                         $outputPage->setRevisionId( $this->getRevIdFetched() );
 577                                         # Preload timestamp to avoid a DB hit
 578                                         $outputPage->setRevisionTimestamp( $this->mPage->getTimestamp() );
 579
 580                                         if ( !Hooks::run( 'ArticleContentViewCustom',
 581                                                 [ $this->fetchContentObject(), $this->getTitle(), $outputPage ] )
 582                                         ) {
 583                                                 # Allow extensions do their own custom view for certain pages
 584                                                 $outputDone = true;
 585                                         }
 586                                         break;
 587                                 case 4:
 588                                         # Run the parse, protected by a pool counter
 589                                         wfDebug( __METHOD__ . ": doing uncached parse\n" );
 590
 591                                         $content = $this->getContentObject();
 592                                         $poolArticleView = new PoolWorkArticleView( $this->getPage(), $parserOptions,
 593                                                 $this->getRevIdFetched(), $useParserCache, $content );
 594
 595                                         if ( !$poolArticleView->execute() ) {
 596                                                 $error = $poolArticleView->getError();
 597                                                 if ( $error ) {
 598                                                         $outputPage->clearHTML(); // for release() errors
 599                                                         $outputPage->enableClientCache( false );
 600                                                         $outputPage->setRobotPolicy( 'noindex,nofollow' );
 601
 602                                                         $errortext = $error->getWikiText( false, 'view-pool-error' );
 603                                                         $outputPage->addWikiText( Html::errorBox( $errortext ) );
 604                                                 }
 605                                                 # Connection or timeout error
 606                                                 return;
 607                                         }
 608
 609                                         $this->mParserOutput = $poolArticleView->getParserOutput();
 610                                         $outputPage->addParserOutput( $this->mParserOutput, $poOptions );
 611                                         if ( $content->getRedirectTarget() ) {
 612                                                 $outputPage->addSubtitle( "<span id=\"redirectsub\">" .
 613                                                         $this->getContext()->msg( 'redirectpagesub' )->parse() . "</span>" );
 614                                         }
 615
 616                                         # Don't cache a dirty ParserOutput object
 617                                         if ( $poolArticleView->getIsDirty() ) {
 618                                                 $outputPage->setCdnMaxage( 0 );
 619                                                 $outputPage->addHTML( "<!-- parser cache is expired, " .
 620                                                         "sending anyway due to pool overload-->\n" );
 621                                         }
 622
 623                                         $outputDone = true;
 624                                         break;
 625                                 # Should be unreachable, but just in case...
 626                                 default:
 627                                         break 2;
 628                         }
 629                 }
 630
 631                 # Get the ParserOutput actually *displayed* here.
 632                 # Note that $this->mParserOutput is the *current*/oldid version output.
 633                 $pOutput = ( $outputDone instanceof ParserOutput )
 634                         ? $outputDone // object fetched by hook
 635                         : $this->mParserOutput;
 636
 637                 # Adjust title for main page & pages with displaytitle
 638                 if ( $pOutput ) {
 639                         $this->adjustDisplayTitle( $pOutput );
 640                 }
 641
 642                 # For the main page, overwrite the <title> element with the con-
 643                 # tents of 'pagetitle-view-mainpage' instead of the default (if
 644                 # that's not empty).
 645                 # This message always exists because it is in the i18n files
 646                 if ( $this->getTitle()->isMainPage() ) {
 647                         $msg = wfMessage( 'pagetitle-view-mainpage' )->inContentLanguage();
 648                         if ( !$msg->isDisabled() ) {
 649                                 $outputPage->setHTMLTitle( $msg->title( $this->getTitle() )->text() );
 650                         }
 651                 }
 652
 653                 # Use adaptive TTLs for CDN so delayed/failed purges are noticed less often.
 654                 # This could use getTouched(), but that could be scary for major template edits.
 655                 $outputPage->adaptCdnTTL( $this->mPage->getTimestamp(), IExpiringStore::TTL_DAY );
 656
 657                 # Check for any __NOINDEX__ tags on the page using $pOutput
 658                 $policy = $this->getRobotPolicy( 'view', $pOutput );
 659                 $outputPage->setIndexPolicy( $policy['index'] );
 660                 $outputPage->setFollowPolicy( $policy['follow'] );
 661
 662                 $this->showViewFooter();
 663                 $this->mPage->doViewUpdates( $user, $oldid );
 664
 665                 # Load the postEdit module if the user just saved this revision
 666                 # See also EditPage::setPostEditCookie
 667                 $request = $this->getContext()->getRequest();
 668                 $cookieKey = EditPage::POST_EDIT_COOKIE_KEY_PREFIX . $this->getRevIdFetched();
 669                 $postEdit = $request->getCookie( $cookieKey );
 670                 if ( $postEdit ) {
 671                         # Clear the cookie. This also prevents caching of the response.
 672                         $request->response()->clearCookie( $cookieKey );
 673                         $outputPage->addJsConfigVars( 'wgPostEdit', $postEdit );
 674                         $outputPage->addModules( 'mediawiki.action.view.postEdit' );
 675                 }
 676         }
 677
 678         /**
 679          * Adjust title for pages with displaytitle, -{T|}- or language conversion
 680          * @param ParserOutput $pOutput
 681          */
 682         public function adjustDisplayTitle( ParserOutput $pOutput ) {
 683                 # Adjust the title if it was set by displaytitle, -{T|}- or language conversion
 684                 $titleText = $pOutput->getTitleText();
 685                 if ( strval( $titleText ) !== '' ) {
 686                         $this->getContext()->getOutput()->setPageTitle( $titleText );
 687                 }
 688         }
 689
 690         /**
 691          * Show a diff page according to current request variables. For use within
 692          * Article::view() only, other callers should use the DifferenceEngine class.
 693          */
 694         protected function showDiffPage() {
 695                 $request = $this->getContext()->getRequest();
 696                 $user = $this->getContext()->getUser();
 697                 $diff = $request->getVal( 'diff' );
 698                 $rcid = $request->getVal( 'rcid' );
 699                 $diffOnly = $request->getBool( 'diffonly', $user->getOption( 'diffonly' ) );
 700                 $purge = $request->getVal( 'action' ) == 'purge';
 701                 $unhide = $request->getInt( 'unhide' ) == 1;
 702                 $oldid = $this->getOldID();
 703
 704                 $rev = $this->getRevisionFetched();
 705
 706                 if ( !$rev ) {
 707                         $this->getContext()->getOutput()->setPageTitle( wfMessage( 'errorpagetitle' ) );
 708                         $msg = $this->getContext()->msg( 'difference-missing-revision' )
 709                                 ->params( $oldid )
 710                                 ->numParams( 1 )
 711                                 ->parseAsBlock();
 712                         $this->getContext()->getOutput()->addHTML( $msg );
 713                         return;
 714                 }
 715
 716                 $contentHandler = $rev->getContentHandler();
 717                 $de = $contentHandler->createDifferenceEngine(
 718                         $this->getContext(),
 719                         $oldid,
 720                         $diff,
 721                         $rcid,
 722                         $purge,
 723                         $unhide
 724                 );
 725
 726                 // DifferenceEngine directly fetched the revision:
 727                 $this->mRevIdFetched = $de->mNewid;
 728                 $de->showDiffPage( $diffOnly );
 729
 730                 // Run view updates for the newer revision being diffed (and shown
 731                 // below the diff if not $diffOnly).
 732                 list( $old, $new ) = $de->mapDiffPrevNext( $oldid, $diff );
 733                 // New can be false, convert it to 0 - this conveniently means the latest revision
 734                 $this->mPage->doViewUpdates( $user, (int)$new );
 735         }
 736
 737         /**
 738          * Get the robot policy to be used for the current view
 739          * @param string $action The action= GET parameter
 740          * @param ParserOutput|null $pOutput
 741          * @return array The policy that should be set
 742          * @todo actions other than 'view'
 743          */
 744         public function getRobotPolicy( $action, $pOutput = null ) {
 745                 global $wgArticleRobotPolicies, $wgNamespaceRobotPolicies, $wgDefaultRobotPolicy;
 746
 747                 $ns = $this->getTitle()->getNamespace();
 748
 749                 # Don't index user and user talk pages for blocked users (T13443)
 750                 if ( ( $ns == NS_USER || $ns == NS_USER_TALK ) && !$this->getTitle()->isSubpage() ) {
 751                         $specificTarget = null;
 752                         $vagueTarget = null;
 753                         $titleText = $this->getTitle()->getText();
 754                         if ( IP::isValid( $titleText ) ) {
 755                                 $vagueTarget = $titleText;
 756                         } else {
 757                                 $specificTarget = $titleText;
 758                         }
 759                         if ( Block::newFromTarget( $specificTarget, $vagueTarget ) instanceof Block ) {
 760                                 return [
 761                                         'index' => 'noindex',
 762                                         'follow' => 'nofollow'
 763                                 ];
 764                         }
 765                 }
 766
 767                 if ( $this->mPage->getId() === 0 || $this->getOldID() ) {
 768                         # Non-articles (special pages etc), and old revisions
 769                         return [
 770                                 'index' => 'noindex',
 771                                 'follow' => 'nofollow'
 772                         ];
 773                 } elseif ( $this->getContext()->getOutput()->isPrintable() ) {
 774                         # Discourage indexing of printable versions, but encourage following
 775                         return [
 776                                 'index' => 'noindex',
 777                                 'follow' => 'follow'
 778                         ];
 779                 } elseif ( $this->getContext()->getRequest()->getInt( 'curid' ) ) {
 780                         # For ?curid=x urls, disallow indexing
 781                         return [
 782                                 'index' => 'noindex',
 783                                 'follow' => 'follow'
 784                         ];
 785                 }
 786
 787                 # Otherwise, construct the policy based on the various config variables.
 788                 $policy = self::formatRobotPolicy( $wgDefaultRobotPolicy );
 789
 790                 if ( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 791                         # Honour customised robot policies for this namespace
 792                         $policy = array_merge(
 793                                 $policy,
 794                                 self::formatRobotPolicy( $wgNamespaceRobotPolicies[$ns] )
 795                         );
 796                 }
 797                 if ( $this->getTitle()->canUseNoindex() && is_object( $pOutput ) && $pOutput->getIndexPolicy() ) {
 798                         # __INDEX__ and __NOINDEX__ magic words, if allowed. Incorporates
 799                         # a final sanity check that we have really got the parser output.
 800                         $policy = array_merge(
 801                                 $policy,
 802                                 [ 'index' => $pOutput->getIndexPolicy() ]
 803                         );
 804                 }
 805
 806                 if ( isset( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] ) ) {
 807                         # (T16900) site config can override user-defined __INDEX__ or __NOINDEX__
 808                         $policy = array_merge(
 809                                 $policy,
 810                                 self::formatRobotPolicy( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] )
 811                         );
 812                 }
 813
 814                 return $policy;
 815         }
 816
 817         /**
 818          * Converts a String robot policy into an associative array, to allow
 819          * merging of several policies using array_merge().
 820          * @param array|string $policy Returns empty array on null/false/'', transparent
 821          *   to already-converted arrays, converts string.
 822          * @return array 'index' => \<indexpolicy\>, 'follow' => \<followpolicy\>
 823          */
 824         public static function formatRobotPolicy( $policy ) {
 825                 if ( is_array( $policy ) ) {
 826                         return $policy;
 827                 } elseif ( !$policy ) {
 828                         return [];
 829                 }
 830
 831                 $policy = explode( ',', $policy );
 832                 $policy = array_map( 'trim', $policy );
 833
 834                 $arr = [];
 835                 foreach ( $policy as $var ) {
 836                         if ( in_array( $var, [ 'index', 'noindex' ] ) ) {
 837                                 $arr['index'] = $var;
 838                         } elseif ( in_array( $var, [ 'follow', 'nofollow' ] ) ) {
 839                                 $arr['follow'] = $var;
 840                         }
 841                 }
 842
 843                 return $arr;
 844         }
 845
 846         /**
 847          * If this request is a redirect view, send "redirected from" subtitle to
 848          * the output. Returns true if the header was needed, false if this is not
 849          * a redirect view. Handles both local and remote redirects.
 850          *
 851          * @return bool
 852          */
 853         public function showRedirectedFromHeader() {
 854                 global $wgRedirectSources;
 855
 856                 $context = $this->getContext();
 857                 $outputPage = $context->getOutput();
 858                 $request = $context->getRequest();
 859                 $rdfrom = $request->getVal( 'rdfrom' );
 860
 861                 // Construct a URL for the current page view, but with the target title
 862                 $query = $request->getValues();
 863                 unset( $query['rdfrom'] );
 864                 unset( $query['title'] );
 865                 if ( $this->getTitle()->isRedirect() ) {
 866                         // Prevent double redirects
 867                         $query['redirect'] = 'no';
 868                 }
 869                 $redirectTargetUrl = $this->getTitle()->getLinkURL( $query );
 870
 871                 if ( isset( $this->mRedirectedFrom ) ) {
 872                         // Avoid PHP 7.1 warning of passing $this by reference
 873                         $articlePage = $this;
 874
 875                         // This is an internally redirected page view.
 876                         // We'll need a backlink to the source page for navigation.
 877                         if ( Hooks::run( 'ArticleViewRedirect', [ &$articlePage ] ) ) {
 878                                 $redir = Linker::linkKnown(
 879                                         $this->mRedirectedFrom,
 880                                         null,
 881                                         [],
 882                                         [ 'redirect' => 'no' ]
 883                                 );
 884
 885                                 $outputPage->addSubtitle( "<span class=\"mw-redirectedfrom\">" .
 886                                         $context->msg( 'redirectedfrom' )->rawParams( $redir )->parse()
 887                                 . "</span>" );
 888
 889                                 // Add the script to update the displayed URL and
 890                                 // set the fragment if one was specified in the redirect
 891                                 $outputPage->addJsConfigVars( [
 892                                         'wgInternalRedirectTargetUrl' => $redirectTargetUrl,
 893                                 ] );
 894                                 $outputPage->addModules( 'mediawiki.action.view.redirect' );
 895
 896                                 // Add a <link rel="canonical"> tag
 897                                 $outputPage->setCanonicalUrl( $this->getTitle()->getCanonicalURL() );
 898
 899                                 // Tell the output object that the user arrived at this article through a redirect
 900                                 $outputPage->setRedirectedFrom( $this->mRedirectedFrom );
 901
 902                                 return true;
 903                         }
 904                 } elseif ( $rdfrom ) {
 905                         // This is an externally redirected view, from some other wiki.
 906                         // If it was reported from a trusted site, supply a backlink.
 907                         if ( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 908                                 $redir = Linker::makeExternalLink( $rdfrom, $rdfrom );
 909                                 $outputPage->addSubtitle( "<span class=\"mw-redirectedfrom\">" .
 910                                         $context->msg( 'redirectedfrom' )->rawParams( $redir )->parse()
 911                                 . "</span>" );
 912
 913                                 // Add the script to update the displayed URL
 914                                 $outputPage->addJsConfigVars( [
 915                                         'wgInternalRedirectTargetUrl' => $redirectTargetUrl,
 916                                 ] );
 917                                 $outputPage->addModules( 'mediawiki.action.view.redirect' );
 918
 919                                 return true;
 920                         }
 921                 }
 922
 923                 return false;
 924         }
 925
 926         /**
 927          * Show a header specific to the namespace currently being viewed, like
 928          * [[MediaWiki:Talkpagetext]]. For Article::view().
 929          */
 930         public function showNamespaceHeader() {
 931                 if ( $this->getTitle()->isTalkPage() ) {
 932                         if ( !wfMessage( 'talkpageheader' )->isDisabled() ) {
 933                                 $this->getContext()->getOutput()->wrapWikiMsg(
 934                                         "<div class=\"mw-talkpageheader\">\n$1\n</div>",
 935                                         [ 'talkpageheader' ]
 936                                 );
 937                         }
 938                 }
 939         }
 940
 941         /**
 942          * Show the footer section of an ordinary page view
 943          */
 944         public function showViewFooter() {
 945                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 946                 if ( $this->getTitle()->getNamespace() == NS_USER_TALK
 947                         && IP::isValid( $this->getTitle()->getText() )
 948                 ) {
 949                         $this->getContext()->getOutput()->addWikiMsg( 'anontalkpagetext' );
 950                 }
 951
 952                 // Show a footer allowing the user to patrol the shown revision or page if possible
 953                 $patrolFooterShown = $this->showPatrolFooter();
 954
 955                 Hooks::run( 'ArticleViewFooter', [ $this, $patrolFooterShown ] );
 956         }
 957
 958         /**
 959          * If patrol is possible, output a patrol UI box. This is called from the
 960          * footer section of ordinary page views. If patrol is not possible or not
 961          * desired, does nothing.
 962          * Side effect: When the patrol link is build, this method will call
 963          * OutputPage::preventClickjacking() and load mediawiki.page.patrol.ajax.
 964          *
 965          * @return bool
 966          */
 967         public function showPatrolFooter() {
 968                 global $wgUseNPPatrol, $wgUseRCPatrol, $wgUseFilePatrol, $wgEnableAPI, $wgEnableWriteAPI;
 969
 970                 $outputPage = $this->getContext()->getOutput();
 971                 $user = $this->getContext()->getUser();
 972                 $title = $this->getTitle();
 973                 $rc = false;
 974
 975                 if ( !$title->quickUserCan( 'patrol', $user )
 976                         || !( $wgUseRCPatrol || $wgUseNPPatrol
 977                                 || ( $wgUseFilePatrol && $title->inNamespace( NS_FILE ) ) )
 978                 ) {
 979                         // Patrolling is disabled or the user isn't allowed to
 980                         return false;
 981                 }
 982
 983                 if ( $this->mRevision
 984                         && !RecentChange::isInRCLifespan( $this->mRevision->getTimestamp(), 21600 )
 985                 ) {
 986                         // The current revision is already older than what could be in the RC table
 987                         // 6h tolerance because the RC might not be cleaned out regularly
 988                         return false;
 989                 }
 990
 991                 // Check for cached results
 992                 $cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
 993                 $key = $cache->makeKey( 'unpatrollable-page', $title->getArticleID() );
 994                 if ( $cache->get( $key ) ) {
 995                         return false;
 996                 }
 997
 998                 $dbr = wfGetDB( DB_REPLICA );
 999                 $oldestRevisionTimestamp = $dbr->selectField(
1000                         'revision',
1001                         'MIN( rev_timestamp )',
1002                         [ 'rev_page' => $title->getArticleID() ],
1003                         __METHOD__
1004                 );
1005
1006                 // New page patrol: Get the timestamp of the oldest revison which
1007                 // the revision table holds for the given page. Then we look
1008                 // whether it's within the RC lifespan and if it is, we try
1009                 // to get the recentchanges row belonging to that entry
1010                 // (with rc_new = 1).
1011                 $recentPageCreation = false;
1012                 if ( $oldestRevisionTimestamp
1013                         && RecentChange::isInRCLifespan( $oldestRevisionTimestamp, 21600 )
1014                 ) {
1015                         // 6h tolerance because the RC might not be cleaned out regularly
1016                         $recentPageCreation = true;
1017                         $rc = RecentChange::newFromConds(
1018                                 [
1019                                         'rc_new' => 1,
1020                                         'rc_timestamp' => $oldestRevisionTimestamp,
1021                                         'rc_namespace' => $title->getNamespace(),
1022                                         'rc_cur_id' => $title->getArticleID()
1023                                 ],
1024                                 __METHOD__
1025                         );
1026                         if ( $rc ) {
1027                                 // Use generic patrol message for new pages
1028                                 $markPatrolledMsg = wfMessage( 'markaspatrolledtext' );
1029                         }
1030                 }
1031
1032                 // File patrol: Get the timestamp of the latest upload for this page,
1033                 // check whether it is within the RC lifespan and if it is, we try
1034                 // to get the recentchanges row belonging to that entry
1035                 // (with rc_type = RC_LOG, rc_log_type = upload).
1036                 $recentFileUpload = false;
1037                 if ( ( !$rc || $rc->getAttribute( 'rc_patrolled' ) ) && $wgUseFilePatrol
1038                         && $title->getNamespace() === NS_FILE ) {
1039                         // Retrieve timestamp of most recent upload
1040                         $newestUploadTimestamp = $dbr->selectField(
1041                                 'image',
1042                                 'MAX( img_timestamp )',
1043                                 [ 'img_name' => $title->getDBkey() ],
1044                                 __METHOD__
1045                         );
1046                         if ( $newestUploadTimestamp
1047                                 && RecentChange::isInRCLifespan( $newestUploadTimestamp, 21600 )
1048                         ) {
1049                                 // 6h tolerance because the RC might not be cleaned out regularly
1050                                 $recentFileUpload = true;
1051                                 $rc = RecentChange::newFromConds(
1052                                         [
1053                                                 'rc_type' => RC_LOG,
1054                                                 'rc_log_type' => 'upload',
1055                                                 'rc_timestamp' => $newestUploadTimestamp,
1056                                                 'rc_namespace' => NS_FILE,
1057                                                 'rc_cur_id' => $title->getArticleID()
1058                                         ],
1059                                         __METHOD__,
1060                                         [ 'USE INDEX' => 'rc_timestamp' ]
1061                                 );
1062                                 if ( $rc ) {
1063                                         // Use patrol message specific to files
1064                                         $markPatrolledMsg = wfMessage( 'markaspatrolledtext-file' );
1065                                 }
1066                         }
1067                 }
1068
1069                 if ( !$recentPageCreation && !$recentFileUpload ) {
1070                         // Page creation and latest upload (for files) is too old to be in RC
1071
1072                         // We definitely can't patrol so cache the information
1073                         // When a new file version is uploaded, the cache is cleared
1074                         $cache->set( $key, '1' );
1075
1076                         return false;
1077                 }
1078
1079                 if ( !$rc ) {
1080                         // Don't cache: This can be hit if the page gets accessed very fast after
1081                         // its creation / latest upload or in case we have high replica DB lag. In case
1082                         // the revision is too old, we will already return above.
1083                         return false;
1084                 }
1085
1086                 if ( $rc->getAttribute( 'rc_patrolled' ) ) {
1087                         // Patrolled RC entry around
1088
1089                         // Cache the information we gathered above in case we can't patrol
1090                         // Don't cache in case we can patrol as this could change
1091                         $cache->set( $key, '1' );
1092
1093                         return false;
1094                 }
1095
1096                 if ( $rc->getPerformer()->equals( $user ) ) {
1097                         // Don't show a patrol link for own creations/uploads. If the user could
1098                         // patrol them, they already would be patrolled
1099                         return false;
1100                 }
1101
1102                 $outputPage->preventClickjacking();
1103                 if ( $wgEnableAPI && $wgEnableWriteAPI && $user->isAllowed( 'writeapi' ) ) {
1104                         $outputPage->addModules( 'mediawiki.page.patrol.ajax' );
1105                 }
1106
1107                 $link = Linker::linkKnown(
1108                         $title,
1109                         $markPatrolledMsg->escaped(),
1110                         [],
1111                         [
1112                                 'action' => 'markpatrolled',
1113                                 'rcid' => $rc->getAttribute( 'rc_id' ),
1114                         ]
1115                 );
1116
1117                 $outputPage->addHTML(
1118                         "<div class='patrollink' data-mw='interface'>" .
1119                                 wfMessage( 'markaspatrolledlink' )->rawParams( $link )->escaped() .
1120                         '</div>'
1121                 );
1122
1123                 return true;
1124         }
1125
1126         /**
1127          * Purge the cache used to check if it is worth showing the patrol footer
1128          * For example, it is done during re-uploads when file patrol is used.
1129          * @param int $articleID ID of the article to purge
1130          * @since 1.27
1131          */
1132         public static function purgePatrolFooterCache( $articleID ) {
1133                 $cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
1134                 $cache->delete( $cache->makeKey( 'unpatrollable-page', $articleID ) );
1135         }
1136
1137         /**
1138          * Show the error text for a missing article. For articles in the MediaWiki
1139          * namespace, show the default message text. To be called from Article::view().
1140          */
1141         public function showMissingArticle() {
1142                 global $wgSend404Code;
1143
1144                 $outputPage = $this->getContext()->getOutput();
1145                 // Whether the page is a root user page of an existing user (but not a subpage)
1146                 $validUserPage = false;
1147
1148                 $title = $this->getTitle();
1149
1150                 # Show info in user (talk) namespace. Does the user exist? Is he blocked?
1151                 if ( $title->getNamespace() == NS_USER
1152                         || $title->getNamespace() == NS_USER_TALK
1153                 ) {
1154                         $rootPart = explode( '/', $title->getText() )[0];
1155                         $user = User::newFromName( $rootPart, false /* allow IP users */ );
1156                         $ip = User::isIP( $rootPart );
1157                         $block = Block::newFromTarget( $user, $user );
1158
1159                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
1160                                 $outputPage->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n\$1\n</div>",
1161                                         [ 'userpage-userdoesnotexist-view', wfEscapeWikiText( $rootPart ) ] );
1162                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
1163                                 # Show log extract if the user is currently blocked
1164                                 LogEventsList::showLogExtract(
1165                                         $outputPage,
1166                                         'block',
1167                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
1168                                         '',
1169                                         [
1170                                                 'lim' => 1,
1171                                                 'showIfEmpty' => false,
1172                                                 'msgKey' => [
1173                                                         'blocked-notice-logextract',
1174                                                         $user->getName() # Support GENDER in notice
1175                                                 ]
1176                                         ]
1177                                 );
1178                                 $validUserPage = !$title->isSubpage();
1179                         } else {
1180                                 $validUserPage = !$title->isSubpage();
1181                         }
1182                 }
1183
1184                 Hooks::run( 'ShowMissingArticle', [ $this ] );
1185
1186                 # Show delete and move logs if there were any such events.
1187                 # The logging query can DOS the site when bots/crawlers cause 404 floods,
1188                 # so be careful showing this. 404 pages must be cheap as they are hard to cache.
1189                 $cache = MediaWikiServices::getInstance()->getMainObjectStash();
1190                 $key = $cache->makeKey( 'page-recent-delete', md5( $title->getPrefixedText() ) );
1191                 $loggedIn = $this->getContext()->getUser()->isLoggedIn();
1192                 $sessionExists = $this->getContext()->getRequest()->getSession()->isPersistent();
1193                 if ( $loggedIn || $cache->get( $key ) || $sessionExists ) {
1194                         $logTypes = [ 'delete', 'move', 'protect' ];
1195
1196                         $dbr = wfGetDB( DB_REPLICA );
1197
1198                         $conds = [ 'log_action != ' . $dbr->addQuotes( 'revision' ) ];
1199                         // Give extensions a chance to hide their (unrelated) log entries
1200                         Hooks::run( 'Article::MissingArticleConditions', [ &$conds, $logTypes ] );
1201                         LogEventsList::showLogExtract(
1202                                 $outputPage,
1203                                 $logTypes,
1204                                 $title,
1205                                 '',
1206                                 [
1207                                         'lim' => 10,
1208                                         'conds' => $conds,
1209                                         'showIfEmpty' => false,
1210                                         'msgKey' => [ $loggedIn || $sessionExists
1211                                                 ? 'moveddeleted-notice'
1212                                                 : 'moveddeleted-notice-recent'
1213                                         ]
1214                                 ]
1215                         );
1216                 }
1217
1218                 if ( !$this->mPage->hasViewableContent() && $wgSend404Code && !$validUserPage ) {
1219                         // If there's no backing content, send a 404 Not Found
1220                         // for better machine handling of broken links.
1221                         $this->getContext()->getRequest()->response()->statusHeader( 404 );
1222                 }
1223
1224                 // Also apply the robot policy for nonexisting pages (even if a 404 was used for sanity)
1225                 $policy = $this->getRobotPolicy( 'view' );
1226                 $outputPage->setIndexPolicy( $policy['index'] );
1227                 $outputPage->setFollowPolicy( $policy['follow'] );
1228
1229                 $hookResult = Hooks::run( 'BeforeDisplayNoArticleText', [ $this ] );
1230
1231                 if ( !$hookResult ) {
1232                         return;
1233                 }
1234
1235                 # Show error message
1236                 $oldid = $this->getOldID();
1237                 if ( !$oldid && $title->getNamespace() === NS_MEDIAWIKI && $title->hasSourceText() ) {
1238                         $outputPage->addParserOutput( $this->getContentObject()->getParserOutput( $title ) );
1239                 } else {
1240                         if ( $oldid ) {
1241                                 $text = wfMessage( 'missing-revision', $oldid )->plain();
1242                         } elseif ( $title->quickUserCan( 'create', $this->getContext()->getUser() )
1243                                 && $title->quickUserCan( 'edit', $this->getContext()->getUser() )
1244                         ) {
1245                                 $message = $this->getContext()->getUser()->isLoggedIn() ? 'noarticletext' : 'noarticletextanon';
1246                                 $text = wfMessage( $message )->plain();
1247                         } else {
1248                                 $text = wfMessage( 'noarticletext-nopermission' )->plain();
1249                         }
1250
1251                         $dir = $this->getContext()->getLanguage()->getDir();
1252                         $lang = $this->getContext()->getLanguage()->getCode();
1253                         $outputPage->addWikiText( Xml::openElement( 'div', [
1254                                 'class' => "noarticletext mw-content-$dir",
1255                                 'dir' => $dir,
1256                                 'lang' => $lang,
1257                         ] ) . "\n$text\n</div>" );
1258                 }
1259         }
1260
1261         /**
1262          * If the revision requested for view is deleted, check permissions.
1263          * Send either an error message or a warning header to the output.
1264          *
1265          * @return bool True if the view is allowed, false if not.
1266          */
1267         public function showDeletedRevisionHeader() {
1268                 if ( !$this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1269                         // Not deleted
1270                         return true;
1271                 }
1272
1273                 $outputPage = $this->getContext()->getOutput();
1274                 $user = $this->getContext()->getUser();
1275                 // If the user is not allowed to see it...
1276                 if ( !$this->mRevision->userCan( Revision::DELETED_TEXT, $user ) ) {
1277                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1278                                 'rev-deleted-text-permission' );
1279
1280                         return false;
1281                 // If the user needs to confirm that they want to see it...
1282                 } elseif ( $this->getContext()->getRequest()->getInt( 'unhide' ) != 1 ) {
1283                         # Give explanation and add a link to view the revision...
1284                         $oldid = intval( $this->getOldID() );
1285                         $link = $this->getTitle()->getFullURL( "oldid={$oldid}&unhide=1" );
1286                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1287                                 'rev-suppressed-text-unhide' : 'rev-deleted-text-unhide';
1288                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1289                                 [ $msg, $link ] );
1290
1291                         return false;
1292                 // We are allowed to see...
1293                 } else {
1294                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1295                                 'rev-suppressed-text-view' : 'rev-deleted-text-view';
1296                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", $msg );
1297
1298                         return true;
1299                 }
1300         }
1301
1302         /**
1303          * Generate the navigation links when browsing through an article revisions
1304          * It shows the information as:
1305          *   Revision as of \<date\>; view current revision
1306          *   \<- Previous version | Next Version -\>
1307          *
1308          * @param int $oldid Revision ID of this article revision
1309          */
1310         public function setOldSubtitle( $oldid = 0 ) {
1311                 // Avoid PHP 7.1 warning of passing $this by reference
1312                 $articlePage = $this;
1313
1314                 if ( !Hooks::run( 'DisplayOldSubtitle', [ &$articlePage, &$oldid ] ) ) {
1315                         return;
1316                 }
1317
1318                 $context = $this->getContext();
1319                 $unhide = $context->getRequest()->getInt( 'unhide' ) == 1;
1320
1321                 # Cascade unhide param in links for easy deletion browsing
1322                 $extraParams = [];
1323                 if ( $unhide ) {
1324                         $extraParams['unhide'] = 1;
1325                 }
1326
1327                 if ( $this->mRevision && $this->mRevision->getId() === $oldid ) {
1328                         $revision = $this->mRevision;
1329                 } else {
1330                         $revision = Revision::newFromId( $oldid );
1331                 }
1332
1333                 $timestamp = $revision->getTimestamp();
1334
1335                 $current = ( $oldid == $this->mPage->getLatest() );
1336                 $language = $context->getLanguage();
1337                 $user = $context->getUser();
1338
1339                 $td = $language->userTimeAndDate( $timestamp, $user );
1340                 $tddate = $language->userDate( $timestamp, $user );
1341                 $tdtime = $language->userTime( $timestamp, $user );
1342
1343                 # Show user links if allowed to see them. If hidden, then show them only if requested...
1344                 $userlinks = Linker::revUserTools( $revision, !$unhide );
1345
1346                 $infomsg = $current && !$context->msg( 'revision-info-current' )->isDisabled()
1347                         ? 'revision-info-current'
1348                         : 'revision-info';
1349
1350                 $outputPage = $context->getOutput();
1351                 $revisionInfo = "<div id=\"mw-{$infomsg}\">" .
1352                         $context->msg( $infomsg, $td )
1353                                 ->rawParams( $userlinks )
1354                                 ->params( $revision->getId(), $tddate, $tdtime, $revision->getUserText() )
1355                                 ->rawParams( Linker::revComment( $revision, true, true ) )
1356                                 ->parse() .
1357                         "</div>";
1358
1359                 $lnk = $current
1360                         ? $context->msg( 'currentrevisionlink' )->escaped()
1361                         : Linker::linkKnown(
1362                                 $this->getTitle(),
1363                                 $context->msg( 'currentrevisionlink' )->escaped(),
1364                                 [],
1365                                 $extraParams
1366                         );
1367                 $curdiff = $current
1368                         ? $context->msg( 'diff' )->escaped()
1369                         : Linker::linkKnown(
1370                                 $this->getTitle(),
1371                                 $context->msg( 'diff' )->escaped(),
1372                                 [],
1373                                 [
1374                                         'diff' => 'cur',
1375                                         'oldid' => $oldid
1376                                 ] + $extraParams
1377                         );
1378                 $prev = $this->getTitle()->getPreviousRevisionID( $oldid );
1379                 $prevlink = $prev
1380                         ? Linker::linkKnown(
1381                                 $this->getTitle(),
1382                                 $context->msg( 'previousrevision' )->escaped(),
1383                                 [],
1384                                 [
1385                                         'direction' => 'prev',
1386                                         'oldid' => $oldid
1387                                 ] + $extraParams
1388                         )
1389                         : $context->msg( 'previousrevision' )->escaped();
1390                 $prevdiff = $prev
1391                         ? Linker::linkKnown(
1392                                 $this->getTitle(),
1393                                 $context->msg( 'diff' )->escaped(),
1394                                 [],
1395                                 [
1396                                         'diff' => 'prev',
1397                                         'oldid' => $oldid
1398                                 ] + $extraParams
1399                         )
1400                         : $context->msg( 'diff' )->escaped();
1401                 $nextlink = $current
1402                         ? $context->msg( 'nextrevision' )->escaped()
1403                         : Linker::linkKnown(
1404                                 $this->getTitle(),
1405                                 $context->msg( 'nextrevision' )->escaped(),
1406                                 [],
1407                                 [
1408                                         'direction' => 'next',
1409                                         'oldid' => $oldid
1410                                 ] + $extraParams
1411                         );
1412                 $nextdiff = $current
1413                         ? $context->msg( 'diff' )->escaped()
1414                         : Linker::linkKnown(
1415                                 $this->getTitle(),
1416                                 $context->msg( 'diff' )->escaped(),
1417                                 [],
1418                                 [
1419                                         'diff' => 'next',
1420                                         'oldid' => $oldid
1421                                 ] + $extraParams
1422                         );
1423
1424                 $cdel = Linker::getRevDeleteLink( $user, $revision, $this->getTitle() );
1425                 if ( $cdel !== '' ) {
1426                         $cdel .= ' ';
1427                 }
1428
1429                 // the outer div is need for styling the revision info and nav in MobileFrontend
1430                 $outputPage->addSubtitle( "<div class=\"mw-revision\">" . $revisionInfo .
1431                         "<div id=\"mw-revision-nav\">" . $cdel .
1432                         $context->msg( 'revision-nav' )->rawParams(
1433                                 $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff
1434                         )->escaped() . "</div></div>" );
1435         }
1436
1437         /**
1438          * Return the HTML for the top of a redirect page
1439          *
1440          * Chances are you should just be using the ParserOutput from
1441          * WikitextContent::getParserOutput instead of calling this for redirects.
1442          *
1443          * @param Title|array $target Destination(s) to redirect
1444          * @param bool $appendSubtitle [optional]
1445          * @param bool $forceKnown Should the image be shown as a bluelink regardless of existence?
1446          * @return string Containing HTML with redirect link
1447          *
1448          * @deprecated since 1.30
1449          */
1450         public function viewRedirect( $target, $appendSubtitle = true, $forceKnown = false ) {
1451                 $lang = $this->getTitle()->getPageLanguage();
1452                 $out = $this->getContext()->getOutput();
1453                 if ( $appendSubtitle ) {
1454                         $out->addSubtitle( wfMessage( 'redirectpagesub' ) );
1455                 }
1456                 $out->addModuleStyles( 'mediawiki.action.view.redirectPage' );
1457                 return static::getRedirectHeaderHtml( $lang, $target, $forceKnown );
1458         }
1459
1460         /**
1461          * Return the HTML for the top of a redirect page
1462          *
1463          * Chances are you should just be using the ParserOutput from
1464          * WikitextContent::getParserOutput instead of calling this for redirects.
1465          *
1466          * @since 1.23
1467          * @param Language $lang
1468          * @param Title|array $target Destination(s) to redirect
1469          * @param bool $forceKnown Should the image be shown as a bluelink regardless of existence?
1470          * @return string Containing HTML with redirect link
1471          */
1472         public static function getRedirectHeaderHtml( Language $lang, $target, $forceKnown = false ) {
1473                 if ( !is_array( $target ) ) {
1474                         $target = [ $target ];
1475                 }
1476
1477                 $html = '<ul class="redirectText">';
1478                 /** @var Title $title */
1479                 foreach ( $target as $title ) {
1480                         $html .= '<li>' . Linker::link(
1481                                 $title,
1482                                 htmlspecialchars( $title->getFullText() ),
1483                                 [],
1484                                 // Make sure wiki page redirects are not followed
1485                                 $title->isRedirect() ? [ 'redirect' => 'no' ] : [],
1486                                 ( $forceKnown ? [ 'known', 'noclasses' ] : [] )
1487                         ) . '</li>';
1488                 }
1489                 $html .= '</ul>';
1490
1491                 $redirectToText = wfMessage( 'redirectto' )->inLanguage( $lang )->escaped();
1492
1493                 return '<div class="redirectMsg">' .
1494                         '<p>' . $redirectToText . '</p>' .
1495                         $html .
1496                         '</div>';
1497         }
1498
1499         /**
1500          * Adds help link with an icon via page indicators.
1501          * Link target can be overridden by a local message containing a wikilink:
1502          * the message key is: 'namespace-' + namespace number + '-helppage'.
1503          * @param string $to Target MediaWiki.org page title or encoded URL.
1504          * @param bool $overrideBaseUrl Whether $url is a full URL, to avoid MW.o.
1505          * @since 1.25
1506          */
1507         public function addHelpLink( $to, $overrideBaseUrl = false ) {
1508                 $msg = wfMessage(
1509                         'namespace-' . $this->getTitle()->getNamespace() . '-helppage'
1510                 );
1511
1512                 $out = $this->getContext()->getOutput();
1513                 if ( !$msg->isDisabled() ) {
1514                         $helpUrl = Skin::makeUrl( $msg->plain() );
1515                         $out->addHelpLink( $helpUrl, true );
1516                 } else {
1517                         $out->addHelpLink( $to, $overrideBaseUrl );
1518                 }
1519         }
1520
1521         /**
1522          * Handle action=render
1523          */
1524         public function render() {
1525                 $this->getContext()->getRequest()->response()->header( 'X-Robots-Tag: noindex' );
1526                 $this->getContext()->getOutput()->setArticleBodyOnly( true );
1527                 $this->disableSectionEditForRender = true;
1528                 $this->view();
1529         }
1530
1531         /**
1532          * action=protect handler
1533          */
1534         public function protect() {
1535                 $form = new ProtectionForm( $this );
1536                 $form->execute();
1537         }
1538
1539         /**
1540          * action=unprotect handler (alias)
1541          */
1542         public function unprotect() {
1543                 $this->protect();
1544         }
1545
1546         /**
1547          * UI entry point for page deletion
1548          */
1549         public function delete() {
1550                 # This code desperately needs to be totally rewritten
1551
1552                 $title = $this->getTitle();
1553                 $context = $this->getContext();
1554                 $user = $context->getUser();
1555                 $request = $context->getRequest();
1556
1557                 # Check permissions
1558                 $permissionErrors = $title->getUserPermissionsErrors( 'delete', $user );
1559                 if ( count( $permissionErrors ) ) {
1560                         throw new PermissionsError( 'delete', $permissionErrors );
1561                 }
1562
1563                 # Read-only check...
1564                 if ( wfReadOnly() ) {
1565                         throw new ReadOnlyError;
1566                 }
1567
1568                 # Better double-check that it hasn't been deleted yet!
1569                 $this->mPage->loadPageData(
1570                         $request->wasPosted() ? WikiPage::READ_LATEST : WikiPage::READ_NORMAL
1571                 );
1572                 if ( !$this->mPage->exists() ) {
1573                         $deleteLogPage = new LogPage( 'delete' );
1574                         $outputPage = $context->getOutput();
1575                         $outputPage->setPageTitle( $context->msg( 'cannotdelete-title', $title->getPrefixedText() ) );
1576                         $outputPage->wrapWikiMsg( "<div class=\"error mw-error-cannotdelete\">\n$1\n</div>",
1577                                         [ 'cannotdelete', wfEscapeWikiText( $title->getPrefixedText() ) ]
1578                                 );
1579                         $outputPage->addHTML(
1580                                 Xml::element( 'h2', null, $deleteLogPage->getName()->text() )
1581                         );
1582                         LogEventsList::showLogExtract(
1583                                 $outputPage,
1584                                 'delete',
1585                                 $title
1586                         );
1587
1588                         return;
1589                 }
1590
1591                 $deleteReasonList = $request->getText( 'wpDeleteReasonList', 'other' );
1592                 $deleteReason = $request->getText( 'wpReason' );
1593
1594                 if ( $deleteReasonList == 'other' ) {
1595                         $reason = $deleteReason;
1596                 } elseif ( $deleteReason != '' ) {
1597                         // Entry from drop down menu + additional comment
1598                         $colonseparator = wfMessage( 'colon-separator' )->inContentLanguage()->text();
1599                         $reason = $deleteReasonList . $colonseparator . $deleteReason;
1600                 } else {
1601                         $reason = $deleteReasonList;
1602                 }
1603
1604                 if ( $request->wasPosted() && $user->matchEditToken( $request->getVal( 'wpEditToken' ),
1605                         [ 'delete', $this->getTitle()->getPrefixedText() ] )
1606                 ) {
1607                         # Flag to hide all contents of the archived revisions
1608                         $suppress = $request->getCheck( 'wpSuppress' ) && $user->isAllowed( 'suppressrevision' );
1609
1610                         $this->doDelete( $reason, $suppress );
1611
1612                         WatchAction::doWatchOrUnwatch( $request->getCheck( 'wpWatch' ), $title, $user );
1613
1614                         return;
1615                 }
1616
1617                 // Generate deletion reason
1618                 $hasHistory = false;
1619                 if ( !$reason ) {
1620                         try {
1621                                 $reason = $this->generateReason( $hasHistory );
1622                         } catch ( Exception $e ) {
1623                                 # if a page is horribly broken, we still want to be able to
1624                                 # delete it. So be lenient about errors here.
1625                                 wfDebug( "Error while building auto delete summary: $e" );
1626                                 $reason = '';
1627                         }
1628                 }
1629
1630                 // If the page has a history, insert a warning
1631                 if ( $hasHistory ) {
1632                         $title = $this->getTitle();
1633
1634                         // The following can use the real revision count as this is only being shown for users
1635                         // that can delete this page.
1636                         // This, as a side-effect, also makes sure that the following query isn't being run for
1637                         // pages with a larger history, unless the user has the 'bigdelete' right
1638                         // (and is about to delete this page).
1639                         $dbr = wfGetDB( DB_REPLICA );
1640                         $revisions = $edits = (int)$dbr->selectField(
1641                                 'revision',
1642                                 'COUNT(rev_page)',
1643                                 [ 'rev_page' => $title->getArticleID() ],
1644                                 __METHOD__
1645                         );
1646
1647                         // @todo FIXME: i18n issue/patchwork message
1648                         $context->getOutput()->addHTML(
1649                                 '<strong class="mw-delete-warning-revisions">' .
1650                                 $context->msg( 'historywarning' )->numParams( $revisions )->parse() .
1651                                 $context->msg( 'word-separator' )->escaped() . Linker::linkKnown( $title,
1652                                         $context->msg( 'history' )->escaped(),
1653                                         [],
1654                                         [ 'action' => 'history' ] ) .
1655                                 '</strong>'
1656                         );
1657
1658                         if ( $title->isBigDeletion() ) {
1659                                 global $wgDeleteRevisionsLimit;
1660                                 $context->getOutput()->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
1661                                         [
1662                                                 'delete-warning-toobig',
1663                                                 $context->getLanguage()->formatNum( $wgDeleteRevisionsLimit )
1664                                         ]
1665                                 );
1666                         }
1667                 }
1668
1669                 $this->confirmDelete( $reason );
1670         }
1671
1672         /**
1673          * Output deletion confirmation dialog
1674          * @todo FIXME: Move to another file?
1675          * @param string $reason Prefilled reason
1676          */
1677         public function confirmDelete( $reason ) {
1678                 wfDebug( "Article::confirmDelete\n" );
1679
1680                 $title = $this->getTitle();
1681                 $ctx = $this->getContext();
1682                 $outputPage = $ctx->getOutput();
1683                 $outputPage->setPageTitle( wfMessage( 'delete-confirm', $title->getPrefixedText() ) );
1684                 $outputPage->addBacklinkSubtitle( $title );
1685                 $outputPage->setRobotPolicy( 'noindex,nofollow' );
1686                 $outputPage->addModules( 'mediawiki.action.delete' );
1687
1688                 $backlinkCache = $title->getBacklinkCache();
1689                 if ( $backlinkCache->hasLinks( 'pagelinks' ) || $backlinkCache->hasLinks( 'templatelinks' ) ) {
1690                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1691                                 'deleting-backlinks-warning' );
1692                 }
1693
1694                 $subpageQueryLimit = 51;
1695                 $subpages = $title->getSubpages( $subpageQueryLimit );
1696                 $subpageCount = count( $subpages );
1697                 if ( $subpageCount > 0 ) {
1698                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1699                                 [ 'deleting-subpages-warning', Message::numParam( $subpageCount ) ] );
1700                 }
1701                 $outputPage->addWikiMsg( 'confirmdeletetext' );
1702
1703                 Hooks::run( 'ArticleConfirmDelete', [ $this, $outputPage, &$reason ] );
1704
1705                 $user = $this->getContext()->getUser();
1706                 $checkWatch = $user->getBoolOption( 'watchdeletion' ) || $user->isWatched( $title );
1707
1708                 $outputPage->enableOOUI();
1709
1710                 $options = Xml::listDropDownOptions(
1711                         $ctx->msg( 'deletereason-dropdown' )->inContentLanguage()->text(),
1712                         [ 'other' => $ctx->msg( 'deletereasonotherlist' )->inContentLanguage()->text() ]
1713                 );
1714                 $options = Xml::listDropDownOptionsOoui( $options );
1715
1716                 $fields[] = new OOUI\FieldLayout(
1717                         new OOUI\DropdownInputWidget( [
1718                                 'name' => 'wpDeleteReasonList',
1719                                 'inputId' => 'wpDeleteReasonList',
1720                                 'tabIndex' => 1,
1721                                 'infusable' => true,
1722                                 'value' => '',
1723                                 'options' => $options
1724                         ] ),
1725                         [
1726                                 'label' => $ctx->msg( 'deletecomment' )->text(),
1727                                 'align' => 'top',
1728                         ]
1729                 );
1730
1731                 // HTML maxlength uses "UTF-16 code units", which means that characters outside BMP
1732                 // (e.g. emojis) count for two each. This limit is overridden in JS to instead count
1733                 // Unicode codepoints (or 255 UTF-8 bytes for old schema).
1734                 $conf = $this->getContext()->getConfig();
1735                 $oldCommentSchema = $conf->get( 'CommentTableSchemaMigrationStage' ) === MIGRATION_OLD;
1736                 $fields[] = new OOUI\FieldLayout(
1737                         new OOUI\TextInputWidget( [
1738                                 'name' => 'wpReason',
1739                                 'inputId' => 'wpReason',
1740                                 'tabIndex' => 2,
1741                                 'maxLength' => $oldCommentSchema ? 255 : CommentStore::COMMENT_CHARACTER_LIMIT,
1742                                 'infusable' => true,
1743                                 'value' => $reason,
1744                                 'autofocus' => true,
1745                         ] ),
1746                         [
1747                                 'label' => $ctx->msg( 'deleteotherreason' )->text(),
1748                                 'align' => 'top',
1749                         ]
1750                 );
1751
1752                 if ( $user->isLoggedIn() ) {
1753                         $fields[] = new OOUI\FieldLayout(
1754                                 new OOUI\CheckboxInputWidget( [
1755                                         'name' => 'wpWatch',
1756                                         'inputId' => 'wpWatch',
1757                                         'tabIndex' => 3,
1758                                         'selected' => $checkWatch,
1759                                 ] ),
1760                                 [
1761                                         'label' => $ctx->msg( 'watchthis' )->text(),
1762                                         'align' => 'inline',
1763                                         'infusable' => true,
1764                                 ]
1765                         );
1766                 }
1767
1768                 if ( $user->isAllowed( 'suppressrevision' ) ) {
1769                         $fields[] = new OOUI\FieldLayout(
1770                                 new OOUI\CheckboxInputWidget( [
1771                                         'name' => 'wpSuppress',
1772                                         'inputId' => 'wpSuppress',
1773                                         'tabIndex' => 4,
1774                                 ] ),
1775                                 [
1776                                         'label' => $ctx->msg( 'revdelete-suppress' )->text(),
1777                                         'align' => 'inline',
1778                                         'infusable' => true,
1779                                 ]
1780                         );
1781                 }
1782
1783                 $fields[] = new OOUI\FieldLayout(
1784                         new OOUI\ButtonInputWidget( [
1785                                 'name' => 'wpConfirmB',
1786                                 'inputId' => 'wpConfirmB',
1787                                 'tabIndex' => 5,
1788                                 'value' => $ctx->msg( 'deletepage' )->text(),
1789                                 'label' => $ctx->msg( 'deletepage' )->text(),
1790                                 'flags' => [ 'primary', 'destructive' ],
1791                                 'type' => 'submit',
1792                         ] ),
1793                         [
1794                                 'align' => 'top',
1795                         ]
1796                 );
1797
1798                 $fieldset = new OOUI\FieldsetLayout( [
1799                         'label' => $ctx->msg( 'delete-legend' )->text(),
1800                         'id' => 'mw-delete-table',
1801                         'items' => $fields,
1802                 ] );
1803
1804                 $form = new OOUI\FormLayout( [
1805                         'method' => 'post',
1806                         'action' => $title->getLocalURL( 'action=delete' ),
1807                         'id' => 'deleteconfirm',
1808                 ] );
1809                 $form->appendContent(
1810                         $fieldset,
1811                         new OOUI\HtmlSnippet(
1812                                 Html::hidden( 'wpEditToken', $user->getEditToken( [ 'delete', $title->getPrefixedText() ] ) )
1813                         )
1814                 );
1815
1816                 $outputPage->addHTML(
1817                         new OOUI\PanelLayout( [
1818                                 'classes' => [ 'deletepage-wrapper' ],
1819                                 'expanded' => false,
1820                                 'padded' => true,
1821                                 'framed' => true,
1822                                 'content' => $form,
1823                         ] )
1824                 );
1825
1826                 if ( $user->isAllowed( 'editinterface' ) ) {
1827                         $link = Linker::linkKnown(
1828                                 $ctx->msg( 'deletereason-dropdown' )->inContentLanguage()->getTitle(),
1829                                 wfMessage( 'delete-edit-reasonlist' )->escaped(),
1830                                 [],
1831                                 [ 'action' => 'edit' ]
1832                         );
1833                         $outputPage->addHTML( '<p class="mw-delete-editreasons">' . $link . '</p>' );
1834                 }
1835
1836                 $deleteLogPage = new LogPage( 'delete' );
1837                 $outputPage->addHTML( Xml::element( 'h2', null, $deleteLogPage->getName()->text() ) );
1838                 LogEventsList::showLogExtract( $outputPage, 'delete', $title );
1839         }
1840
1841         /**
1842          * Perform a deletion and output success or failure messages
1843          * @param string $reason
1844          * @param bool $suppress
1845          */
1846         public function doDelete( $reason, $suppress = false ) {
1847                 $error = '';
1848                 $context = $this->getContext();
1849                 $outputPage = $context->getOutput();
1850                 $user = $context->getUser();
1851                 $status = $this->mPage->doDeleteArticleReal( $reason, $suppress, 0, true, $error, $user );
1852
1853                 if ( $status->isGood() ) {
1854                         $deleted = $this->getTitle()->getPrefixedText();
1855
1856                         $outputPage->setPageTitle( wfMessage( 'actioncomplete' ) );
1857                         $outputPage->setRobotPolicy( 'noindex,nofollow' );
1858
1859                         $loglink = '[[Special:Log/delete|' . wfMessage( 'deletionlog' )->text() . ']]';
1860
1861                         $outputPage->addWikiMsg( 'deletedtext', wfEscapeWikiText( $deleted ), $loglink );
1862
1863                         Hooks::run( 'ArticleDeleteAfterSuccess', [ $this->getTitle(), $outputPage ] );
1864
1865                         $outputPage->returnToMain( false );
1866                 } else {
1867                         $outputPage->setPageTitle(
1868                                 wfMessage( 'cannotdelete-title',
1869                                         $this->getTitle()->getPrefixedText() )
1870                         );
1871
1872                         if ( $error == '' ) {
1873                                 $outputPage->addWikiText(
1874                                         "<div class=\"error mw-error-cannotdelete\">\n" . $status->getWikiText() . "\n</div>"
1875                                 );
1876                                 $deleteLogPage = new LogPage( 'delete' );
1877                                 $outputPage->addHTML( Xml::element( 'h2', null, $deleteLogPage->getName()->text() ) );
1878
1879                                 LogEventsList::showLogExtract(
1880                                         $outputPage,
1881                                         'delete',
1882                                         $this->getTitle()
1883                                 );
1884                         } else {
1885                                 $outputPage->addHTML( $error );
1886                         }
1887                 }
1888         }
1889
1890         /* Caching functions */
1891
1892         /**
1893          * checkLastModified returns true if it has taken care of all
1894          * output to the client that is necessary for this request.
1895          * (that is, it has sent a cached version of the page)
1896          *
1897          * @return bool True if cached version send, false otherwise
1898          */
1899         protected function tryFileCache() {
1900                 static $called = false;
1901
1902                 if ( $called ) {
1903                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
1904                         return false;
1905                 }
1906
1907                 $called = true;
1908                 if ( $this->isFileCacheable() ) {
1909                         $cache = new HTMLFileCache( $this->getTitle(), 'view' );
1910                         if ( $cache->isCacheGood( $this->mPage->getTouched() ) ) {
1911                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
1912                                 $cache->loadFromFileCache( $this->getContext() );
1913                                 return true;
1914                         } else {
1915                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
1916                                 ob_start( [ &$cache, 'saveToFileCache' ] );
1917                         }
1918                 } else {
1919                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
1920                 }
1921
1922                 return false;
1923         }
1924
1925         /**
1926          * Check if the page can be cached
1927          * @param int $mode One of the HTMLFileCache::MODE_* constants (since 1.28)
1928          * @return bool
1929          */
1930         public function isFileCacheable( $mode = HTMLFileCache::MODE_NORMAL ) {
1931                 $cacheable = false;
1932
1933                 if ( HTMLFileCache::useFileCache( $this->getContext(), $mode ) ) {
1934                         $cacheable = $this->mPage->getId()
1935                                 && !$this->mRedirectedFrom && !$this->getTitle()->isRedirect();
1936                         // Extension may have reason to disable file caching on some pages.
1937                         if ( $cacheable ) {
1938                                 // Avoid PHP 7.1 warning of passing $this by reference
1939                                 $articlePage = $this;
1940                                 $cacheable = Hooks::run( 'IsFileCacheable', [ &$articlePage ] );
1941                         }
1942                 }
1943
1944                 return $cacheable;
1945         }
1946
1947         /**#@-*/
1948
1949         /**
1950          * Lightweight method to get the parser output for a page, checking the parser cache
1951          * and so on. Doesn't consider most of the stuff that WikiPage::view is forced to
1952          * consider, so it's not appropriate to use there.
1953          *
1954          * @since 1.16 (r52326) for LiquidThreads
1955          *
1956          * @param int|null $oldid Revision ID or null
1957          * @param User $user The relevant user
1958          * @return ParserOutput|bool ParserOutput or false if the given revision ID is not found
1959          */
1960         public function getParserOutput( $oldid = null, User $user = null ) {
1961                 // XXX: bypasses mParserOptions and thus setParserOptions()
1962
1963                 if ( $user === null ) {
1964                         $parserOptions = $this->getParserOptions();
1965                 } else {
1966                         $parserOptions = $this->mPage->makeParserOptions( $user );
1967                 }
1968
1969                 return $this->mPage->getParserOutput( $parserOptions, $oldid );
1970         }
1971
1972         /**
1973          * Override the ParserOptions used to render the primary article wikitext.
1974          *
1975          * @param ParserOptions $options
1976          * @throws MWException If the parser options where already initialized.
1977          */
1978         public function setParserOptions( ParserOptions $options ) {
1979                 if ( $this->mParserOptions ) {
1980                         throw new MWException( "can't change parser options after they have already been set" );
1981                 }
1982
1983                 // clone, so if $options is modified later, it doesn't confuse the parser cache.
1984                 $this->mParserOptions = clone $options;
1985         }
1986
1987         /**
1988          * Get parser options suitable for rendering the primary article wikitext
1989          * @return ParserOptions
1990          */
1991         public function getParserOptions() {
1992                 if ( !$this->mParserOptions ) {
1993                         $this->mParserOptions = $this->mPage->makeParserOptions( $this->getContext() );
1994                 }
1995                 // Clone to allow modifications of the return value without affecting cache
1996                 return clone $this->mParserOptions;
1997         }
1998
1999         /**
2000          * Sets the context this Article is executed in
2001          *
2002          * @param IContextSource $context
2003          * @since 1.18
2004          */
2005         public function setContext( $context ) {
2006                 $this->mContext = $context;
2007         }
2008
2009         /**
2010          * Gets the context this Article is executed in
2011          *
2012          * @return IContextSource
2013          * @since 1.18
2014          */
2015         public function getContext() {
2016                 if ( $this->mContext instanceof IContextSource ) {
2017                         return $this->mContext;
2018                 } else {
2019                         wfDebug( __METHOD__ . " called and \$mContext is null. " .
2020                                 "Return RequestContext::getMain(); for sanity\n" );
2021                         return RequestContext::getMain();
2022                 }
2023         }
2024
2025         /**
2026          * Use PHP's magic __get handler to handle accessing of
2027          * raw WikiPage fields for backwards compatibility.
2028          *
2029          * @param string $fname Field name
2030          * @return mixed
2031          */
2032         public function __get( $fname ) {
2033                 if ( property_exists( $this->mPage, $fname ) ) {
2034                         # wfWarn( "Access to raw $fname field " . __CLASS__ );
2035                         return $this->mPage->$fname;
2036                 }
2037                 trigger_error( 'Inaccessible property via __get(): ' . $fname, E_USER_NOTICE );
2038         }
2039
2040         /**
2041          * Use PHP's magic __set handler to handle setting of
2042          * raw WikiPage fields for backwards compatibility.
2043          *
2044          * @param string $fname Field name
2045          * @param mixed $fvalue New value
2046          */
2047         public function __set( $fname, $fvalue ) {
2048                 if ( property_exists( $this->mPage, $fname ) ) {
2049                         # wfWarn( "Access to raw $fname field of " . __CLASS__ );
2050                         $this->mPage->$fname = $fvalue;
2051                 // Note: extensions may want to toss on new fields
2052                 } elseif ( !in_array( $fname, [ 'mContext', 'mPage' ] ) ) {
2053                         $this->mPage->$fname = $fvalue;
2054                 } else {
2055                         trigger_error( 'Inaccessible property via __set(): ' . $fname, E_USER_NOTICE );
2056                 }
2057         }
2058
2059         /**
2060          * Call to WikiPage function for backwards compatibility.
2061          * @see WikiPage::checkFlags
2062          */
2063         public function checkFlags( $flags ) {
2064                 return $this->mPage->checkFlags( $flags );
2065         }
2066
2067         /**
2068          * Call to WikiPage function for backwards compatibility.
2069          * @see WikiPage::checkTouched
2070          */
2071         public function checkTouched() {
2072                 return $this->mPage->checkTouched();
2073         }
2074
2075         /**
2076          * Call to WikiPage function for backwards compatibility.
2077          * @see WikiPage::clearPreparedEdit
2078          */
2079         public function clearPreparedEdit() {
2080                 $this->mPage->clearPreparedEdit();
2081         }
2082
2083         /**
2084          * Call to WikiPage function for backwards compatibility.
2085          * @see WikiPage::doDeleteArticleReal
2086          */
2087         public function doDeleteArticleReal(
2088                 $reason, $suppress = false, $u1 = null, $u2 = null, &$error = '', User $user = null,
2089                 $tags = []
2090         ) {
2091                 return $this->mPage->doDeleteArticleReal(
2092                         $reason, $suppress, $u1, $u2, $error, $user, $tags
2093                 );
2094         }
2095
2096         /**
2097          * Call to WikiPage function for backwards compatibility.
2098          * @see WikiPage::doDeleteUpdates
2099          */
2100         public function doDeleteUpdates( $id, Content $content = null ) {
2101                 return $this->mPage->doDeleteUpdates( $id, $content );
2102         }
2103
2104         /**
2105          * Call to WikiPage function for backwards compatibility.
2106          * @deprecated since 1.29. Use WikiPage::doEditContent() directly instead
2107          * @see WikiPage::doEditContent
2108          */
2109         public function doEditContent( Content $content, $summary, $flags = 0, $baseRevId = false,
2110                 User $user = null, $serialFormat = null
2111         ) {
2112                 wfDeprecated( __METHOD__, '1.29' );
2113                 return $this->mPage->doEditContent( $content, $summary, $flags, $baseRevId,
2114                         $user, $serialFormat
2115                 );
2116         }
2117
2118         /**
2119          * Call to WikiPage function for backwards compatibility.
2120          * @see WikiPage::doEditUpdates
2121          */
2122         public function doEditUpdates( Revision $revision, User $user, array $options = [] ) {
2123                 return $this->mPage->doEditUpdates( $revision, $user, $options );
2124         }
2125
2126         /**
2127          * Call to WikiPage function for backwards compatibility.
2128          * @see WikiPage::doPurge
2129          * @note In 1.28 (and only 1.28), this took a $flags parameter that
2130          *  controlled how much purging was done.
2131          */
2132         public function doPurge() {
2133                 return $this->mPage->doPurge();
2134         }
2135
2136         /**
2137          * Call to WikiPage function for backwards compatibility.
2138          * @see WikiPage::doViewUpdates
2139          */
2140         public function doViewUpdates( User $user, $oldid = 0 ) {
2141                 $this->mPage->doViewUpdates( $user, $oldid );
2142         }
2143
2144         /**
2145          * Call to WikiPage function for backwards compatibility.
2146          * @see WikiPage::exists
2147          */
2148         public function exists() {
2149                 return $this->mPage->exists();
2150         }
2151
2152         /**
2153          * Call to WikiPage function for backwards compatibility.
2154          * @see WikiPage::followRedirect
2155          */
2156         public function followRedirect() {
2157                 return $this->mPage->followRedirect();
2158         }
2159
2160         /**
2161          * Call to WikiPage function for backwards compatibility.
2162          * @see ContentHandler::getActionOverrides
2163          */
2164         public function getActionOverrides() {
2165                 return $this->mPage->getActionOverrides();
2166         }
2167
2168         /**
2169          * Call to WikiPage function for backwards compatibility.
2170          * @see WikiPage::getAutoDeleteReason
2171          */
2172         public function getAutoDeleteReason( &$hasHistory ) {
2173                 return $this->mPage->getAutoDeleteReason( $hasHistory );
2174         }
2175
2176         /**
2177          * Call to WikiPage function for backwards compatibility.
2178          * @see WikiPage::getCategories
2179          */
2180         public function getCategories() {
2181                 return $this->mPage->getCategories();
2182         }
2183
2184         /**
2185          * Call to WikiPage function for backwards compatibility.
2186          * @see WikiPage::getComment
2187          */
2188         public function getComment( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2189                 return $this->mPage->getComment( $audience, $user );
2190         }
2191
2192         /**
2193          * Call to WikiPage function for backwards compatibility.
2194          * @see WikiPage::getContentHandler
2195          */
2196         public function getContentHandler() {
2197                 return $this->mPage->getContentHandler();
2198         }
2199
2200         /**
2201          * Call to WikiPage function for backwards compatibility.
2202          * @see WikiPage::getContentModel
2203          */
2204         public function getContentModel() {
2205                 return $this->mPage->getContentModel();
2206         }
2207
2208         /**
2209          * Call to WikiPage function for backwards compatibility.
2210          * @see WikiPage::getContributors
2211          */
2212         public function getContributors() {
2213                 return $this->mPage->getContributors();
2214         }
2215
2216         /**
2217          * Call to WikiPage function for backwards compatibility.
2218          * @see WikiPage::getCreator
2219          */
2220         public function getCreator( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2221                 return $this->mPage->getCreator( $audience, $user );
2222         }
2223
2224         /**
2225          * Call to WikiPage function for backwards compatibility.
2226          * @see WikiPage::getDeletionUpdates
2227          */
2228         public function getDeletionUpdates( Content $content = null ) {
2229                 return $this->mPage->getDeletionUpdates( $content );
2230         }
2231
2232         /**
2233          * Call to WikiPage function for backwards compatibility.
2234          * @see WikiPage::getHiddenCategories
2235          */
2236         public function getHiddenCategories() {
2237                 return $this->mPage->getHiddenCategories();
2238         }
2239
2240         /**
2241          * Call to WikiPage function for backwards compatibility.
2242          * @see WikiPage::getId
2243          */
2244         public function getId() {
2245                 return $this->mPage->getId();
2246         }
2247
2248         /**
2249          * Call to WikiPage function for backwards compatibility.
2250          * @see WikiPage::getLatest
2251          */
2252         public function getLatest() {
2253                 return $this->mPage->getLatest();
2254         }
2255
2256         /**
2257          * Call to WikiPage function for backwards compatibility.
2258          * @see WikiPage::getLinksTimestamp
2259          */
2260         public function getLinksTimestamp() {
2261                 return $this->mPage->getLinksTimestamp();
2262         }
2263
2264         /**
2265          * Call to WikiPage function for backwards compatibility.
2266          * @see WikiPage::getMinorEdit
2267          */
2268         public function getMinorEdit() {
2269                 return $this->mPage->getMinorEdit();
2270         }
2271
2272         /**
2273          * Call to WikiPage function for backwards compatibility.
2274          * @see WikiPage::getOldestRevision
2275          */
2276         public function getOldestRevision() {
2277                 return $this->mPage->getOldestRevision();
2278         }
2279
2280         /**
2281          * Call to WikiPage function for backwards compatibility.
2282          * @see WikiPage::getRedirectTarget
2283          */
2284         public function getRedirectTarget() {
2285                 return $this->mPage->getRedirectTarget();
2286         }
2287
2288         /**
2289          * Call to WikiPage function for backwards compatibility.
2290          * @see WikiPage::getRedirectURL
2291          */
2292         public function getRedirectURL( $rt ) {
2293                 return $this->mPage->getRedirectURL( $rt );
2294         }
2295
2296         /**
2297          * Call to WikiPage function for backwards compatibility.
2298          * @see WikiPage::getRevision
2299          */
2300         public function getRevision() {
2301                 return $this->mPage->getRevision();
2302         }
2303
2304         /**
2305          * Call to WikiPage function for backwards compatibility.
2306          * @see WikiPage::getTimestamp
2307          */
2308         public function getTimestamp() {
2309                 return $this->mPage->getTimestamp();
2310         }
2311
2312         /**
2313          * Call to WikiPage function for backwards compatibility.
2314          * @see WikiPage::getTouched
2315          */
2316         public function getTouched() {
2317                 return $this->mPage->getTouched();
2318         }
2319
2320         /**
2321          * Call to WikiPage function for backwards compatibility.
2322          * @see WikiPage::getUndoContent
2323          */
2324         public function getUndoContent( Revision $undo, Revision $undoafter = null ) {
2325                 return $this->mPage->getUndoContent( $undo, $undoafter );
2326         }
2327
2328         /**
2329          * Call to WikiPage function for backwards compatibility.
2330          * @see WikiPage::getUser
2331          */
2332         public function getUser( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2333                 return $this->mPage->getUser( $audience, $user );
2334         }
2335
2336         /**
2337          * Call to WikiPage function for backwards compatibility.
2338          * @see WikiPage::getUserText
2339          */
2340         public function getUserText( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2341                 return $this->mPage->getUserText( $audience, $user );
2342         }
2343
2344         /**
2345          * Call to WikiPage function for backwards compatibility.
2346          * @see WikiPage::hasViewableContent
2347          */
2348         public function hasViewableContent() {
2349                 return $this->mPage->hasViewableContent();
2350         }
2351
2352         /**
2353          * Call to WikiPage function for backwards compatibility.
2354          * @see WikiPage::insertOn
2355          */
2356         public function insertOn( $dbw, $pageId = null ) {
2357                 return $this->mPage->insertOn( $dbw, $pageId );
2358         }
2359
2360         /**
2361          * Call to WikiPage function for backwards compatibility.
2362          * @see WikiPage::insertProtectNullRevision
2363          */
2364         public function insertProtectNullRevision( $revCommentMsg, array $limit,
2365                 array $expiry, $cascade, $reason, $user = null
2366         ) {
2367                 return $this->mPage->insertProtectNullRevision( $revCommentMsg, $limit,
2368                         $expiry, $cascade, $reason, $user
2369                 );
2370         }
2371
2372         /**
2373          * Call to WikiPage function for backwards compatibility.
2374          * @see WikiPage::insertRedirect
2375          */
2376         public function insertRedirect() {
2377                 return $this->mPage->insertRedirect();
2378         }
2379
2380         /**
2381          * Call to WikiPage function for backwards compatibility.
2382          * @see WikiPage::insertRedirectEntry
2383          */
2384         public function insertRedirectEntry( Title $rt, $oldLatest = null ) {
2385                 return $this->mPage->insertRedirectEntry( $rt, $oldLatest );
2386         }
2387
2388         /**
2389          * Call to WikiPage function for backwards compatibility.
2390          * @see WikiPage::isCountable
2391          */
2392         public function isCountable( $editInfo = false ) {
2393                 return $this->mPage->isCountable( $editInfo );
2394         }
2395
2396         /**
2397          * Call to WikiPage function for backwards compatibility.
2398          * @see WikiPage::isRedirect
2399          */
2400         public function isRedirect() {
2401                 return $this->mPage->isRedirect();
2402         }
2403
2404         /**
2405          * Call to WikiPage function for backwards compatibility.
2406          * @see WikiPage::loadFromRow
2407          */
2408         public function loadFromRow( $data, $from ) {
2409                 return $this->mPage->loadFromRow( $data, $from );
2410         }
2411
2412         /**
2413          * Call to WikiPage function for backwards compatibility.
2414          * @see WikiPage::loadPageData
2415          */
2416         public function loadPageData( $from = 'fromdb' ) {
2417                 $this->mPage->loadPageData( $from );
2418         }
2419
2420         /**
2421          * Call to WikiPage function for backwards compatibility.
2422          * @see WikiPage::lockAndGetLatest
2423          */
2424         public function lockAndGetLatest() {
2425                 return $this->mPage->lockAndGetLatest();
2426         }
2427
2428         /**
2429          * Call to WikiPage function for backwards compatibility.
2430          * @see WikiPage::makeParserOptions
2431          */
2432         public function makeParserOptions( $context ) {
2433                 return $this->mPage->makeParserOptions( $context );
2434         }
2435
2436         /**
2437          * Call to WikiPage function for backwards compatibility.
2438          * @see WikiPage::pageDataFromId
2439          */
2440         public function pageDataFromId( $dbr, $id, $options = [] ) {
2441                 return $this->mPage->pageDataFromId( $dbr, $id, $options );
2442         }
2443
2444         /**
2445          * Call to WikiPage function for backwards compatibility.
2446          * @see WikiPage::pageDataFromTitle
2447          */
2448         public function pageDataFromTitle( $dbr, $title, $options = [] ) {
2449                 return $this->mPage->pageDataFromTitle( $dbr, $title, $options );
2450         }
2451
2452         /**
2453          * Call to WikiPage function for backwards compatibility.
2454          * @see WikiPage::prepareContentForEdit
2455          */
2456         public function prepareContentForEdit(
2457                 Content $content, $revision = null, User $user = null,
2458                 $serialFormat = null, $useCache = true
2459         ) {
2460                 return $this->mPage->prepareContentForEdit(
2461                         $content, $revision, $user,
2462                         $serialFormat, $useCache
2463                 );
2464         }
2465
2466         /**
2467          * Call to WikiPage function for backwards compatibility.
2468          * @see WikiPage::protectDescription
2469          */
2470         public function protectDescription( array $limit, array $expiry ) {
2471                 return $this->mPage->protectDescription( $limit, $expiry );
2472         }
2473
2474         /**
2475          * Call to WikiPage function for backwards compatibility.
2476          * @see WikiPage::protectDescriptionLog
2477          */
2478         public function protectDescriptionLog( array $limit, array $expiry ) {
2479                 return $this->mPage->protectDescriptionLog( $limit, $expiry );
2480         }
2481
2482         /**
2483          * Call to WikiPage function for backwards compatibility.
2484          * @see WikiPage::replaceSectionAtRev
2485          */
2486         public function replaceSectionAtRev( $sectionId, Content $sectionContent,
2487                 $sectionTitle = '', $baseRevId = null
2488         ) {
2489                 return $this->mPage->replaceSectionAtRev( $sectionId, $sectionContent,
2490                         $sectionTitle, $baseRevId
2491                 );
2492         }
2493
2494         /**
2495          * Call to WikiPage function for backwards compatibility.
2496          * @see WikiPage::replaceSectionContent
2497          */
2498         public function replaceSectionContent(
2499                 $sectionId, Content $sectionContent, $sectionTitle = '', $edittime = null
2500         ) {
2501                 return $this->mPage->replaceSectionContent(
2502                         $sectionId, $sectionContent, $sectionTitle, $edittime
2503                 );
2504         }
2505
2506         /**
2507          * Call to WikiPage function for backwards compatibility.
2508          * @see WikiPage::setTimestamp
2509          */
2510         public function setTimestamp( $ts ) {
2511                 return $this->mPage->setTimestamp( $ts );
2512         }
2513
2514         /**
2515          * Call to WikiPage function for backwards compatibility.
2516          * @see WikiPage::shouldCheckParserCache
2517          */
2518         public function shouldCheckParserCache( ParserOptions $parserOptions, $oldId ) {
2519                 return $this->mPage->shouldCheckParserCache( $parserOptions, $oldId );
2520         }
2521
2522         /**
2523          * Call to WikiPage function for backwards compatibility.
2524          * @see WikiPage::supportsSections
2525          */
2526         public function supportsSections() {
2527                 return $this->mPage->supportsSections();
2528         }
2529
2530         /**
2531          * Call to WikiPage function for backwards compatibility.
2532          * @see WikiPage::triggerOpportunisticLinksUpdate
2533          */
2534         public function triggerOpportunisticLinksUpdate( ParserOutput $parserOutput ) {
2535                 return $this->mPage->triggerOpportunisticLinksUpdate( $parserOutput );
2536         }
2537
2538         /**
2539          * Call to WikiPage function for backwards compatibility.
2540          * @see WikiPage::updateCategoryCounts
2541          */
2542         public function updateCategoryCounts( array $added, array $deleted, $id = 0 ) {
2543                 return $this->mPage->updateCategoryCounts( $added, $deleted, $id );
2544         }
2545
2546         /**
2547          * Call to WikiPage function for backwards compatibility.
2548          * @see WikiPage::updateIfNewerOn
2549          */
2550         public function updateIfNewerOn( $dbw, $revision ) {
2551                 return $this->mPage->updateIfNewerOn( $dbw, $revision );
2552         }
2553
2554         /**
2555          * Call to WikiPage function for backwards compatibility.
2556          * @see WikiPage::updateRedirectOn
2557          */
2558         public function updateRedirectOn( $dbw, $redirectTitle, $lastRevIsRedirect = null ) {
2559                 return $this->mPage->updateRedirectOn( $dbw, $redirectTitle, $lastRevIsRedirect );
2560         }
2561
2562         /**
2563          * Call to WikiPage function for backwards compatibility.
2564          * @see WikiPage::updateRevisionOn
2565          */
2566         public function updateRevisionOn( $dbw, $revision, $lastRevision = null,
2567                 $lastRevIsRedirect = null
2568         ) {
2569                 return $this->mPage->updateRevisionOn( $dbw, $revision, $lastRevision,
2570                         $lastRevIsRedirect
2571                 );
2572         }
2573
2574         /**
2575          * @param array $limit
2576          * @param array $expiry
2577          * @param bool &$cascade
2578          * @param string $reason
2579          * @param User $user
2580          * @return Status
2581          */
2582         public function doUpdateRestrictions( array $limit, array $expiry, &$cascade,
2583                 $reason, User $user
2584         ) {
2585                 return $this->mPage->doUpdateRestrictions( $limit, $expiry, $cascade, $reason, $user );
2586         }
2587
2588         /**
2589          * @param array $limit
2590          * @param string $reason
2591          * @param int &$cascade
2592          * @param array $expiry
2593          * @return bool
2594          */
2595         public function updateRestrictions( $limit = [], $reason = '',
2596                 &$cascade = 0, $expiry = []
2597         ) {
2598                 return $this->mPage->doUpdateRestrictions(
2599                         $limit,
2600                         $expiry,
2601                         $cascade,
2602                         $reason,
2603                         $this->getContext()->getUser()
2604                 );
2605         }
2606
2607         /**
2608          * @param string $reason
2609          * @param bool $suppress
2610          * @param int $u1 Unused
2611          * @param bool $u2 Unused
2612          * @param string &$error
2613          * @return bool
2614          */
2615         public function doDeleteArticle(
2616                 $reason, $suppress = false, $u1 = null, $u2 = null, &$error = ''
2617         ) {
2618                 return $this->mPage->doDeleteArticle( $reason, $suppress, $u1, $u2, $error );
2619         }
2620
2621         /**
2622          * @param string $fromP
2623          * @param string $summary
2624          * @param string $token
2625          * @param bool $bot
2626          * @param array &$resultDetails
2627          * @param User|null $user
2628          * @return array
2629          */
2630         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails, User $user = null ) {
2631                 $user = is_null( $user ) ? $this->getContext()->getUser() : $user;
2632                 return $this->mPage->doRollback( $fromP, $summary, $token, $bot, $resultDetails, $user );
2633         }
2634
2635         /**
2636          * @param string $fromP
2637          * @param string $summary
2638          * @param bool $bot
2639          * @param array &$resultDetails
2640          * @param User|null $guser
2641          * @return array
2642          */
2643         public function commitRollback( $fromP, $summary, $bot, &$resultDetails, User $guser = null ) {
2644                 $guser = is_null( $guser ) ? $this->getContext()->getUser() : $guser;
2645                 return $this->mPage->commitRollback( $fromP, $summary, $bot, $resultDetails, $guser );
2646         }
2647
2648         /**
2649          * @param bool &$hasHistory
2650          * @return mixed
2651          */
2652         public function generateReason( &$hasHistory ) {
2653                 $title = $this->mPage->getTitle();
2654                 $handler = ContentHandler::getForTitle( $title );
2655                 return $handler->getAutoDeleteReason( $title, $hasHistory );
2656         }
2657
2658         // ******
2659 }