includes/page/Article.php

   1 <?php
   2 /**
   3  * User interface for page actions.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * Class for viewing MediaWiki article and history.
  25  *
  26  * This maintains WikiPage functions for backwards compatibility.
  27  *
  28  * @todo Move and rewrite code to an Action class
  29  *
  30  * See design.txt for an overview.
  31  * Note: edit user interface and cache support functions have been
  32  * moved to separate EditPage and HTMLFileCache classes.
  33  */
  34 class Article implements Page {
  35         /** @var IContextSource The context this Article is executed in */
  36         protected $mContext;
  37
  38         /** @var WikiPage The WikiPage object of this instance */
  39         protected $mPage;
  40
  41         /** @var ParserOptions ParserOptions object for $wgUser articles */
  42         public $mParserOptions;
  43
  44         /**
  45          * @var string Text of the revision we are working on
  46          * @todo BC cruft
  47          */
  48         public $mContent;
  49
  50         /**
  51          * @var Content Content of the revision we are working on
  52          * @since 1.21
  53          */
  54         public $mContentObject;
  55
  56         /** @var bool Is the content ($mContent) already loaded? */
  57         public $mContentLoaded = false;
  58
  59         /** @var int|null The oldid of the article that is to be shown, 0 for the current revision */
  60         public $mOldId;
  61
  62         /** @var Title Title from which we were redirected here */
  63         public $mRedirectedFrom = null;
  64
  65         /** @var string|bool URL to redirect to or false if none */
  66         public $mRedirectUrl = false;
  67
  68         /** @var int Revision ID of revision we are working on */
  69         public $mRevIdFetched = 0;
  70
  71         /** @var Revision Revision we are working on */
  72         public $mRevision = null;
  73
  74         /** @var ParserOutput */
  75         public $mParserOutput;
  76
  77         /**
  78          * Constructor and clear the article
  79          * @param Title $title Reference to a Title object.
  80          * @param int $oldId Revision ID, null to fetch from request, zero for current
  81          */
  82         public function __construct( Title $title, $oldId = null ) {
  83                 $this->mOldId = $oldId;
  84                 $this->mPage = $this->newPage( $title );
  85         }
  86
  87         /**
  88          * @param Title $title
  89          * @return WikiPage
  90          */
  91         protected function newPage( Title $title ) {
  92                 return new WikiPage( $title );
  93         }
  94
  95         /**
  96          * Constructor from a page id
  97          * @param int $id Article ID to load
  98          * @return Article|null
  99          */
 100         public static function newFromID( $id ) {
 101                 $t = Title::newFromID( $id );
 102                 # @todo FIXME: Doesn't inherit right
 103                 return $t == null ? null : new self( $t );
 104                 # return $t == null ? null : new static( $t ); // PHP 5.3
 105         }
 106
 107         /**
 108          * Create an Article object of the appropriate class for the given page.
 109          *
 110          * @param Title $title
 111          * @param IContextSource $context
 112          * @return Article
 113          */
 114         public static function newFromTitle( $title, IContextSource $context ) {
 115                 if ( NS_MEDIA == $title->getNamespace() ) {
 116                         // FIXME: where should this go?
 117                         $title = Title::makeTitle( NS_FILE, $title->getDBkey() );
 118                 }
 119
 120                 $page = null;
 121                 Hooks::run( 'ArticleFromTitle', [ &$title, &$page, $context ] );
 122                 if ( !$page ) {
 123                         switch ( $title->getNamespace() ) {
 124                                 case NS_FILE:
 125                                         $page = new ImagePage( $title );
 126                                         break;
 127                                 case NS_CATEGORY:
 128                                         $page = new CategoryPage( $title );
 129                                         break;
 130                                 default:
 131                                         $page = new Article( $title );
 132                         }
 133                 }
 134                 $page->setContext( $context );
 135
 136                 return $page;
 137         }
 138
 139         /**
 140          * Create an Article object of the appropriate class for the given page.
 141          *
 142          * @param WikiPage $page
 143          * @param IContextSource $context
 144          * @return Article
 145          */
 146         public static function newFromWikiPage( WikiPage $page, IContextSource $context ) {
 147                 $article = self::newFromTitle( $page->getTitle(), $context );
 148                 $article->mPage = $page; // override to keep process cached vars
 149                 return $article;
 150         }
 151
 152         /**
 153          * Tell the page view functions that this view was redirected
 154          * from another page on the wiki.
 155          * @param Title $from
 156          */
 157         public function setRedirectedFrom( Title $from ) {
 158                 $this->mRedirectedFrom = $from;
 159         }
 160
 161         /**
 162          * Get the title object of the article
 163          *
 164          * @return Title Title object of this page
 165          */
 166         public function getTitle() {
 167                 return $this->mPage->getTitle();
 168         }
 169
 170         /**
 171          * Get the WikiPage object of this instance
 172          *
 173          * @since 1.19
 174          * @return WikiPage
 175          */
 176         public function getPage() {
 177                 return $this->mPage;
 178         }
 179
 180         /**
 181          * Clear the object
 182          */
 183         public function clear() {
 184                 $this->mContentLoaded = false;
 185
 186                 $this->mRedirectedFrom = null; # Title object if set
 187                 $this->mRevIdFetched = 0;
 188                 $this->mRedirectUrl = false;
 189
 190                 $this->mPage->clear();
 191         }
 192
 193         /**
 194          * Note that getContent does not follow redirects anymore.
 195          * If you need to fetch redirectable content easily, try
 196          * the shortcut in WikiPage::getRedirectTarget()
 197          *
 198          * This function has side effects! Do not use this function if you
 199          * only want the real revision text if any.
 200          *
 201          * @deprecated since 1.21; use WikiPage::getContent() instead
 202          *
 203          * @return string Return the text of this revision
 204          */
 205         public function getContent() {
 206                 ContentHandler::deprecated( __METHOD__, '1.21' );
 207                 $content = $this->getContentObject();
 208                 return ContentHandler::getContentText( $content );
 209         }
 210
 211         /**
 212          * Returns a Content object representing the pages effective display content,
 213          * not necessarily the revision's content!
 214          *
 215          * Note that getContent does not follow redirects anymore.
 216          * If you need to fetch redirectable content easily, try
 217          * the shortcut in WikiPage::getRedirectTarget()
 218          *
 219          * This function has side effects! Do not use this function if you
 220          * only want the real revision text if any.
 221          *
 222          * @return Content Return the content of this revision
 223          *
 224          * @since 1.21
 225          */
 226         protected function getContentObject() {
 227
 228                 if ( $this->mPage->getId() === 0 ) {
 229                         # If this is a MediaWiki:x message, then load the messages
 230                         # and return the message value for x.
 231                         if ( $this->getTitle()->getNamespace() == NS_MEDIAWIKI ) {
 232                                 $text = $this->getTitle()->getDefaultMessageText();
 233                                 if ( $text === false ) {
 234                                         $text = '';
 235                                 }
 236
 237                                 $content = ContentHandler::makeContent( $text, $this->getTitle() );
 238                         } else {
 239                                 $message = $this->getContext()->getUser()->isLoggedIn() ? 'noarticletext' : 'noarticletextanon';
 240                                 $content = new MessageContent( $message, null, 'parsemag' );
 241                         }
 242                 } else {
 243                         $this->fetchContentObject();
 244                         $content = $this->mContentObject;
 245                 }
 246
 247                 return $content;
 248         }
 249
 250         /**
 251          * @return int The oldid of the article that is to be shown, 0 for the current revision
 252          */
 253         public function getOldID() {
 254                 if ( is_null( $this->mOldId ) ) {
 255                         $this->mOldId = $this->getOldIDFromRequest();
 256                 }
 257
 258                 return $this->mOldId;
 259         }
 260
 261         /**
 262          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 263          *
 264          * @return int The old id for the request
 265          */
 266         public function getOldIDFromRequest() {
 267                 $this->mRedirectUrl = false;
 268
 269                 $request = $this->getContext()->getRequest();
 270                 $oldid = $request->getIntOrNull( 'oldid' );
 271
 272                 if ( $oldid === null ) {
 273                         return 0;
 274                 }
 275
 276                 if ( $oldid !== 0 ) {
 277                         # Load the given revision and check whether the page is another one.
 278                         # In that case, update this instance to reflect the change.
 279                         if ( $oldid === $this->mPage->getLatest() ) {
 280                                 $this->mRevision = $this->mPage->getRevision();
 281                         } else {
 282                                 $this->mRevision = Revision::newFromId( $oldid );
 283                                 if ( $this->mRevision !== null ) {
 284                                         // Revision title doesn't match the page title given?
 285                                         if ( $this->mPage->getId() != $this->mRevision->getPage() ) {
 286                                                 $function = [ get_class( $this->mPage ), 'newFromID' ];
 287                                                 $this->mPage = call_user_func( $function, $this->mRevision->getPage() );
 288                                         }
 289                                 }
 290                         }
 291                 }
 292
 293                 if ( $request->getVal( 'direction' ) == 'next' ) {
 294                         $nextid = $this->getTitle()->getNextRevisionID( $oldid );
 295                         if ( $nextid ) {
 296                                 $oldid = $nextid;
 297                                 $this->mRevision = null;
 298                         } else {
 299                                 $this->mRedirectUrl = $this->getTitle()->getFullURL( 'redirect=no' );
 300                         }
 301                 } elseif ( $request->getVal( 'direction' ) == 'prev' ) {
 302                         $previd = $this->getTitle()->getPreviousRevisionID( $oldid );
 303                         if ( $previd ) {
 304                                 $oldid = $previd;
 305                                 $this->mRevision = null;
 306                         }
 307                 }
 308
 309                 return $oldid;
 310         }
 311
 312         /**
 313          * Get text of an article from database
 314          * Does *NOT* follow redirects.
 315          *
 316          * @protected
 317          * @note This is really internal functionality that should really NOT be
 318          * used by other functions. For accessing article content, use the WikiPage
 319          * class, especially WikiBase::getContent(). However, a lot of legacy code
 320          * uses this method to retrieve page text from the database, so the function
 321          * has to remain public for now.
 322          *
 323          * @return string|bool String containing article contents, or false if null
 324          * @deprecated since 1.21, use WikiPage::getContent() instead
 325          */
 326         function fetchContent() {
 327                 // BC cruft!
 328
 329                 ContentHandler::deprecated( __METHOD__, '1.21' );
 330
 331                 if ( $this->mContentLoaded && $this->mContent ) {
 332                         return $this->mContent;
 333                 }
 334
 335                 $content = $this->fetchContentObject();
 336
 337                 if ( !$content ) {
 338                         return false;
 339                 }
 340
 341                 // @todo Get rid of mContent everywhere!
 342                 $this->mContent = ContentHandler::getContentText( $content );
 343                 ContentHandler::runLegacyHooks( 'ArticleAfterFetchContent', [ &$this, &$this->mContent ] );
 344
 345                 return $this->mContent;
 346         }
 347
 348         /**
 349          * Get text content object
 350          * Does *NOT* follow redirects.
 351          * @todo When is this null?
 352          *
 353          * @note Code that wants to retrieve page content from the database should
 354          * use WikiPage::getContent().
 355          *
 356          * @return Content|null|bool
 357          *
 358          * @since 1.21
 359          */
 360         protected function fetchContentObject() {
 361                 if ( $this->mContentLoaded ) {
 362                         return $this->mContentObject;
 363                 }
 364
 365                 $this->mContentLoaded = true;
 366                 $this->mContent = null;
 367
 368                 $oldid = $this->getOldID();
 369
 370                 # Pre-fill content with error message so that if something
 371                 # fails we'll have something telling us what we intended.
 372                 // XXX: this isn't page content but a UI message. horrible.
 373                 $this->mContentObject = new MessageContent( 'missing-revision', [ $oldid ] );
 374
 375                 if ( $oldid ) {
 376                         # $this->mRevision might already be fetched by getOldIDFromRequest()
 377                         if ( !$this->mRevision ) {
 378                                 $this->mRevision = Revision::newFromId( $oldid );
 379                                 if ( !$this->mRevision ) {
 380                                         wfDebug( __METHOD__ . " failed to retrieve specified revision, id $oldid\n" );
 381                                         return false;
 382                                 }
 383                         }
 384                 } else {
 385                         $oldid = $this->mPage->getLatest();
 386                         if ( !$oldid ) {
 387                                 wfDebug( __METHOD__ . " failed to find page data for title " .
 388                                         $this->getTitle()->getPrefixedText() . "\n" );
 389                                 return false;
 390                         }
 391
 392                         # Update error message with correct oldid
 393                         $this->mContentObject = new MessageContent( 'missing-revision', [ $oldid ] );
 394
 395                         $this->mRevision = $this->mPage->getRevision();
 396
 397                         if ( !$this->mRevision ) {
 398                                 wfDebug( __METHOD__ . " failed to retrieve current page, rev_id $oldid\n" );
 399                                 return false;
 400                         }
 401                 }
 402
 403                 // @todo FIXME: Horrible, horrible! This content-loading interface just plain sucks.
 404                 // We should instead work with the Revision object when we need it...
 405                 // Loads if user is allowed
 406                 $content = $this->mRevision->getContent(
 407                         Revision::FOR_THIS_USER,
 408                         $this->getContext()->getUser()
 409                 );
 410
 411                 if ( !$content ) {
 412                         wfDebug( __METHOD__ . " failed to retrieve content of revision " .
 413                                 $this->mRevision->getId() . "\n" );
 414                         return false;
 415                 }
 416
 417                 $this->mContentObject = $content;
 418                 $this->mRevIdFetched = $this->mRevision->getId();
 419
 420                 Hooks::run( 'ArticleAfterFetchContentObject', [ &$this, &$this->mContentObject ] );
 421
 422                 return $this->mContentObject;
 423         }
 424
 425         /**
 426          * Returns true if the currently-referenced revision is the current edit
 427          * to this page (and it exists).
 428          * @return bool
 429          */
 430         public function isCurrent() {
 431                 # If no oldid, this is the current version.
 432                 if ( $this->getOldID() == 0 ) {
 433                         return true;
 434                 }
 435
 436                 return $this->mPage->exists() && $this->mRevision && $this->mRevision->isCurrent();
 437         }
 438
 439         /**
 440          * Get the fetched Revision object depending on request parameters or null
 441          * on failure.
 442          *
 443          * @since 1.19
 444          * @return Revision|null
 445          */
 446         public function getRevisionFetched() {
 447                 $this->fetchContentObject();
 448
 449                 return $this->mRevision;
 450         }
 451
 452         /**
 453          * Use this to fetch the rev ID used on page views
 454          *
 455          * @return int Revision ID of last article revision
 456          */
 457         public function getRevIdFetched() {
 458                 if ( $this->mRevIdFetched ) {
 459                         return $this->mRevIdFetched;
 460                 } else {
 461                         return $this->mPage->getLatest();
 462                 }
 463         }
 464
 465         /**
 466          * This is the default action of the index.php entry point: just view the
 467          * page of the given title.
 468          */
 469         public function view() {
 470                 global $wgUseFileCache, $wgDebugToolbar, $wgMaxRedirects;
 471
 472                 # Get variables from query string
 473                 # As side effect this will load the revision and update the title
 474                 # in a revision ID is passed in the request, so this should remain
 475                 # the first call of this method even if $oldid is used way below.
 476                 $oldid = $this->getOldID();
 477
 478                 $user = $this->getContext()->getUser();
 479                 # Another whitelist check in case getOldID() is altering the title
 480                 $permErrors = $this->getTitle()->getUserPermissionsErrors( 'read', $user );
 481                 if ( count( $permErrors ) ) {
 482                         wfDebug( __METHOD__ . ": denied on secondary read check\n" );
 483                         throw new PermissionsError( 'read', $permErrors );
 484                 }
 485
 486                 $outputPage = $this->getContext()->getOutput();
 487                 # getOldID() may as well want us to redirect somewhere else
 488                 if ( $this->mRedirectUrl ) {
 489                         $outputPage->redirect( $this->mRedirectUrl );
 490                         wfDebug( __METHOD__ . ": redirecting due to oldid\n" );
 491
 492                         return;
 493                 }
 494
 495                 # If we got diff in the query, we want to see a diff page instead of the article.
 496                 if ( $this->getContext()->getRequest()->getCheck( 'diff' ) ) {
 497                         wfDebug( __METHOD__ . ": showing diff page\n" );
 498                         $this->showDiffPage();
 499
 500                         return;
 501                 }
 502
 503                 # Set page title (may be overridden by DISPLAYTITLE)
 504                 $outputPage->setPageTitle( $this->getTitle()->getPrefixedText() );
 505
 506                 $outputPage->setArticleFlag( true );
 507                 # Allow frames by default
 508                 $outputPage->allowClickjacking();
 509
 510                 $parserCache = ParserCache::singleton();
 511
 512                 $parserOptions = $this->getParserOptions();
 513                 # Render printable version, use printable version cache
 514                 if ( $outputPage->isPrintable() ) {
 515                         $parserOptions->setIsPrintable( true );
 516                         $parserOptions->setEditSection( false );
 517                 } elseif ( !$this->isCurrent() || !$this->getTitle()->quickUserCan( 'edit', $user ) ) {
 518                         $parserOptions->setEditSection( false );
 519                 }
 520
 521                 # Try client and file cache
 522                 if ( !$wgDebugToolbar && $oldid === 0 && $this->mPage->checkTouched() ) {
 523                         # Use the greatest of the page's timestamp or the timestamp of any
 524                         # redirect in the chain (bug 67849)
 525                         $timestamp = $this->mPage->getTouched();
 526                         if ( isset( $this->mRedirectedFrom ) ) {
 527                                 $timestamp = max( $timestamp, $this->mRedirectedFrom->getTouched() );
 528
 529                                 # If there can be more than one redirect in the chain, we have
 530                                 # to go through the whole chain too in case an intermediate
 531                                 # redirect was changed.
 532                                 if ( $wgMaxRedirects > 1 ) {
 533                                         $titles = Revision::newFromTitle( $this->mRedirectedFrom )
 534                                                 ->getContent( Revision::FOR_THIS_USER, $user )
 535                                                 ->getRedirectChain();
 536                                         $thisTitle = $this->getTitle();
 537                                         foreach ( $titles as $title ) {
 538                                                 if ( Title::compare( $title, $thisTitle ) === 0 ) {
 539                                                         break;
 540                                                 }
 541                                                 $timestamp = max( $timestamp, $title->getTouched() );
 542                                         }
 543                                 }
 544                         }
 545
 546                         # Is it client cached?
 547                         if ( $outputPage->checkLastModified( $timestamp ) ) {
 548                                 wfDebug( __METHOD__ . ": done 304\n" );
 549
 550                                 return;
 551                         # Try file cache
 552                         } elseif ( $wgUseFileCache && $this->tryFileCache() ) {
 553                                 wfDebug( __METHOD__ . ": done file cache\n" );
 554                                 # tell wgOut that output is taken care of
 555                                 $outputPage->disable();
 556                                 $this->mPage->doViewUpdates( $user, $oldid );
 557
 558                                 return;
 559                         }
 560                 }
 561
 562                 # Should the parser cache be used?
 563                 $useParserCache = $this->mPage->shouldCheckParserCache( $parserOptions, $oldid );
 564                 wfDebug( 'Article::view using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
 565                 if ( $user->getStubThreshold() ) {
 566                         $this->getContext()->getStats()->increment( 'pcache_miss_stub' );
 567                 }
 568
 569                 $this->showRedirectedFromHeader();
 570                 $this->showNamespaceHeader();
 571
 572                 # Iterate through the possible ways of constructing the output text.
 573                 # Keep going until $outputDone is set, or we run out of things to do.
 574                 $pass = 0;
 575                 $outputDone = false;
 576                 $this->mParserOutput = false;
 577
 578                 while ( !$outputDone && ++$pass ) {
 579                         switch ( $pass ) {
 580                                 case 1:
 581                                         Hooks::run( 'ArticleViewHeader', [ &$this, &$outputDone, &$useParserCache ] );
 582                                         break;
 583                                 case 2:
 584                                         # Early abort if the page doesn't exist
 585                                         if ( !$this->mPage->exists() ) {
 586                                                 wfDebug( __METHOD__ . ": showing missing article\n" );
 587                                                 $this->showMissingArticle();
 588                                                 $this->mPage->doViewUpdates( $user );
 589                                                 return;
 590                                         }
 591
 592                                         # Try the parser cache
 593                                         if ( $useParserCache ) {
 594                                                 $this->mParserOutput = $parserCache->get( $this->mPage, $parserOptions );
 595
 596                                                 if ( $this->mParserOutput !== false ) {
 597                                                         if ( $oldid ) {
 598                                                                 wfDebug( __METHOD__ . ": showing parser cache contents for current rev permalink\n" );
 599                                                                 $this->setOldSubtitle( $oldid );
 600                                                         } else {
 601                                                                 wfDebug( __METHOD__ . ": showing parser cache contents\n" );
 602                                                         }
 603                                                         $outputPage->addParserOutput( $this->mParserOutput );
 604                                                         # Ensure that UI elements requiring revision ID have
 605                                                         # the correct version information.
 606                                                         $outputPage->setRevisionId( $this->mPage->getLatest() );
 607                                                         # Preload timestamp to avoid a DB hit
 608                                                         $cachedTimestamp = $this->mParserOutput->getTimestamp();
 609                                                         if ( $cachedTimestamp !== null ) {
 610                                                                 $outputPage->setRevisionTimestamp( $cachedTimestamp );
 611                                                                 $this->mPage->setTimestamp( $cachedTimestamp );
 612                                                         }
 613                                                         $outputDone = true;
 614                                                 }
 615                                         }
 616                                         break;
 617                                 case 3:
 618                                         # This will set $this->mRevision if needed
 619                                         $this->fetchContentObject();
 620
 621                                         # Are we looking at an old revision
 622                                         if ( $oldid && $this->mRevision ) {
 623                                                 $this->setOldSubtitle( $oldid );
 624
 625                                                 if ( !$this->showDeletedRevisionHeader() ) {
 626                                                         wfDebug( __METHOD__ . ": cannot view deleted revision\n" );
 627                                                         return;
 628                                                 }
 629                                         }
 630
 631                                         # Ensure that UI elements requiring revision ID have
 632                                         # the correct version information.
 633                                         $outputPage->setRevisionId( $this->getRevIdFetched() );
 634                                         # Preload timestamp to avoid a DB hit
 635                                         $outputPage->setRevisionTimestamp( $this->mPage->getTimestamp() );
 636
 637                                         # Pages containing custom CSS or JavaScript get special treatment
 638                                         if ( $this->getTitle()->isCssOrJsPage() || $this->getTitle()->isCssJsSubpage() ) {
 639                                                 wfDebug( __METHOD__ . ": showing CSS/JS source\n" );
 640                                                 $this->showCssOrJsPage();
 641                                                 $outputDone = true;
 642                                         } elseif ( !Hooks::run( 'ArticleContentViewCustom',
 643                                                         [ $this->fetchContentObject(), $this->getTitle(), $outputPage ] ) ) {
 644
 645                                                 # Allow extensions do their own custom view for certain pages
 646                                                 $outputDone = true;
 647                                         } elseif ( !ContentHandler::runLegacyHooks( 'ArticleViewCustom',
 648                                                         [ $this->fetchContentObject(), $this->getTitle(), $outputPage ] ) ) {
 649
 650                                                 # Allow extensions do their own custom view for certain pages
 651                                                 $outputDone = true;
 652                                         }
 653                                         break;
 654                                 case 4:
 655                                         # Run the parse, protected by a pool counter
 656                                         wfDebug( __METHOD__ . ": doing uncached parse\n" );
 657
 658                                         $content = $this->getContentObject();
 659                                         $poolArticleView = new PoolWorkArticleView( $this->getPage(), $parserOptions,
 660                                                 $this->getRevIdFetched(), $useParserCache, $content );
 661
 662                                         if ( !$poolArticleView->execute() ) {
 663                                                 $error = $poolArticleView->getError();
 664                                                 if ( $error ) {
 665                                                         $outputPage->clearHTML(); // for release() errors
 666                                                         $outputPage->enableClientCache( false );
 667                                                         $outputPage->setRobotPolicy( 'noindex,nofollow' );
 668
 669                                                         $errortext = $error->getWikiText( false, 'view-pool-error' );
 670                                                         $outputPage->addWikiText( '<div class="errorbox">' . $errortext . '</div>' );
 671                                                 }
 672                                                 # Connection or timeout error
 673                                                 return;
 674                                         }
 675
 676                                         $this->mParserOutput = $poolArticleView->getParserOutput();
 677                                         $outputPage->addParserOutput( $this->mParserOutput );
 678                                         if ( $content->getRedirectTarget() ) {
 679                                                 $outputPage->addSubtitle( "<span id=\"redirectsub\">" .
 680                                                         $this->getContext()->msg( 'redirectpagesub' )->parse() . "</span>" );
 681                                         }
 682
 683                                         # Don't cache a dirty ParserOutput object
 684                                         if ( $poolArticleView->getIsDirty() ) {
 685                                                 $outputPage->setCdnMaxage( 0 );
 686                                                 $outputPage->addHTML( "<!-- parser cache is expired, " .
 687                                                         "sending anyway due to pool overload-->\n" );
 688                                         }
 689
 690                                         $outputDone = true;
 691                                         break;
 692                                 # Should be unreachable, but just in case...
 693                                 default:
 694                                         break 2;
 695                         }
 696                 }
 697
 698                 # Get the ParserOutput actually *displayed* here.
 699                 # Note that $this->mParserOutput is the *current*/oldid version output.
 700                 $pOutput = ( $outputDone instanceof ParserOutput )
 701                         ? $outputDone // object fetched by hook
 702                         : $this->mParserOutput;
 703
 704                 # Adjust title for main page & pages with displaytitle
 705                 if ( $pOutput ) {
 706                         $this->adjustDisplayTitle( $pOutput );
 707                 }
 708
 709                 # For the main page, overwrite the <title> element with the con-
 710                 # tents of 'pagetitle-view-mainpage' instead of the default (if
 711                 # that's not empty).
 712                 # This message always exists because it is in the i18n files
 713                 if ( $this->getTitle()->isMainPage() ) {
 714                         $msg = wfMessage( 'pagetitle-view-mainpage' )->inContentLanguage();
 715                         if ( !$msg->isDisabled() ) {
 716                                 $outputPage->setHTMLTitle( $msg->title( $this->getTitle() )->text() );
 717                         }
 718                 }
 719
 720                 # Check for any __NOINDEX__ tags on the page using $pOutput
 721                 $policy = $this->getRobotPolicy( 'view', $pOutput );
 722                 $outputPage->setIndexPolicy( $policy['index'] );
 723                 $outputPage->setFollowPolicy( $policy['follow'] );
 724
 725                 $this->showViewFooter();
 726                 $this->mPage->doViewUpdates( $user, $oldid );
 727
 728                 $outputPage->addModules( 'mediawiki.action.view.postEdit' );
 729
 730         }
 731
 732         /**
 733          * Adjust title for pages with displaytitle, -{T|}- or language conversion
 734          * @param ParserOutput $pOutput
 735          */
 736         public function adjustDisplayTitle( ParserOutput $pOutput ) {
 737                 # Adjust the title if it was set by displaytitle, -{T|}- or language conversion
 738                 $titleText = $pOutput->getTitleText();
 739                 if ( strval( $titleText ) !== '' ) {
 740                         $this->getContext()->getOutput()->setPageTitle( $titleText );
 741                 }
 742         }
 743
 744         /**
 745          * Show a diff page according to current request variables. For use within
 746          * Article::view() only, other callers should use the DifferenceEngine class.
 747          *
 748          */
 749         protected function showDiffPage() {
 750                 $request = $this->getContext()->getRequest();
 751                 $user = $this->getContext()->getUser();
 752                 $diff = $request->getVal( 'diff' );
 753                 $rcid = $request->getVal( 'rcid' );
 754                 $diffOnly = $request->getBool( 'diffonly', $user->getOption( 'diffonly' ) );
 755                 $purge = $request->getVal( 'action' ) == 'purge';
 756                 $unhide = $request->getInt( 'unhide' ) == 1;
 757                 $oldid = $this->getOldID();
 758
 759                 $rev = $this->getRevisionFetched();
 760
 761                 if ( !$rev ) {
 762                         $this->getContext()->getOutput()->setPageTitle( wfMessage( 'errorpagetitle' ) );
 763                         $msg = $this->getContext()->msg( 'difference-missing-revision' )
 764                                 ->params( $oldid )
 765                                 ->numParams( 1 )
 766                                 ->parseAsBlock();
 767                         $this->getContext()->getOutput()->addHTML( $msg );
 768                         return;
 769                 }
 770
 771                 $contentHandler = $rev->getContentHandler();
 772                 $de = $contentHandler->createDifferenceEngine(
 773                         $this->getContext(),
 774                         $oldid,
 775                         $diff,
 776                         $rcid,
 777                         $purge,
 778                         $unhide
 779                 );
 780
 781                 // DifferenceEngine directly fetched the revision:
 782                 $this->mRevIdFetched = $de->mNewid;
 783                 $de->showDiffPage( $diffOnly );
 784
 785                 // Run view updates for the newer revision being diffed (and shown
 786                 // below the diff if not $diffOnly).
 787                 list( $old, $new ) = $de->mapDiffPrevNext( $oldid, $diff );
 788                 // New can be false, convert it to 0 - this conveniently means the latest revision
 789                 $this->mPage->doViewUpdates( $user, (int)$new );
 790         }
 791
 792         /**
 793          * Show a page view for a page formatted as CSS or JavaScript. To be called by
 794          * Article::view() only.
 795          *
 796          * This exists mostly to serve the deprecated ShowRawCssJs hook (used to customize these views).
 797          * It has been replaced by the ContentGetParserOutput hook, which lets you do the same but with
 798          * more flexibility.
 799          *
 800          * @param bool $showCacheHint Whether to show a message telling the user
 801          *   to clear the browser cache (default: true).
 802          */
 803         protected function showCssOrJsPage( $showCacheHint = true ) {
 804                 $outputPage = $this->getContext()->getOutput();
 805
 806                 if ( $showCacheHint ) {
 807                         $dir = $this->getContext()->getLanguage()->getDir();
 808                         $lang = $this->getContext()->getLanguage()->getHtmlCode();
 809
 810                         $outputPage->wrapWikiMsg(
 811                                 "<div id='mw-clearyourcache' lang='$lang' dir='$dir' class='mw-content-$dir'>\n$1\n</div>",
 812                                 'clearyourcache'
 813                         );
 814                 }
 815
 816                 $this->fetchContentObject();
 817
 818                 if ( $this->mContentObject ) {
 819                         // Give hooks a chance to customise the output
 820                         if ( ContentHandler::runLegacyHooks(
 821                                 'ShowRawCssJs',
 822                                 [ $this->mContentObject, $this->getTitle(), $outputPage ] )
 823                         ) {
 824                                 // If no legacy hooks ran, display the content of the parser output, including RL modules,
 825                                 // but excluding metadata like categories and language links
 826                                 $po = $this->mContentObject->getParserOutput( $this->getTitle() );
 827                                 $outputPage->addParserOutputContent( $po );
 828                         }
 829                 }
 830         }
 831
 832         /**
 833          * Get the robot policy to be used for the current view
 834          * @param string $action The action= GET parameter
 835          * @param ParserOutput|null $pOutput
 836          * @return array The policy that should be set
 837          * @todo actions other than 'view'
 838          */
 839         public function getRobotPolicy( $action, $pOutput = null ) {
 840                 global $wgArticleRobotPolicies, $wgNamespaceRobotPolicies, $wgDefaultRobotPolicy;
 841
 842                 $ns = $this->getTitle()->getNamespace();
 843
 844                 # Don't index user and user talk pages for blocked users (bug 11443)
 845                 if ( ( $ns == NS_USER || $ns == NS_USER_TALK ) && !$this->getTitle()->isSubpage() ) {
 846                         $specificTarget = null;
 847                         $vagueTarget = null;
 848                         $titleText = $this->getTitle()->getText();
 849                         if ( IP::isValid( $titleText ) ) {
 850                                 $vagueTarget = $titleText;
 851                         } else {
 852                                 $specificTarget = $titleText;
 853                         }
 854                         if ( Block::newFromTarget( $specificTarget, $vagueTarget ) instanceof Block ) {
 855                                 return [
 856                                         'index' => 'noindex',
 857                                         'follow' => 'nofollow'
 858                                 ];
 859                         }
 860                 }
 861
 862                 if ( $this->mPage->getId() === 0 || $this->getOldID() ) {
 863                         # Non-articles (special pages etc), and old revisions
 864                         return [
 865                                 'index' => 'noindex',
 866                                 'follow' => 'nofollow'
 867                         ];
 868                 } elseif ( $this->getContext()->getOutput()->isPrintable() ) {
 869                         # Discourage indexing of printable versions, but encourage following
 870                         return [
 871                                 'index' => 'noindex',
 872                                 'follow' => 'follow'
 873                         ];
 874                 } elseif ( $this->getContext()->getRequest()->getInt( 'curid' ) ) {
 875                         # For ?curid=x urls, disallow indexing
 876                         return [
 877                                 'index' => 'noindex',
 878                                 'follow' => 'follow'
 879                         ];
 880                 }
 881
 882                 # Otherwise, construct the policy based on the various config variables.
 883                 $policy = self::formatRobotPolicy( $wgDefaultRobotPolicy );
 884
 885                 if ( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 886                         # Honour customised robot policies for this namespace
 887                         $policy = array_merge(
 888                                 $policy,
 889                                 self::formatRobotPolicy( $wgNamespaceRobotPolicies[$ns] )
 890                         );
 891                 }
 892                 if ( $this->getTitle()->canUseNoindex() && is_object( $pOutput ) && $pOutput->getIndexPolicy() ) {
 893                         # __INDEX__ and __NOINDEX__ magic words, if allowed. Incorporates
 894                         # a final sanity check that we have really got the parser output.
 895                         $policy = array_merge(
 896                                 $policy,
 897                                 [ 'index' => $pOutput->getIndexPolicy() ]
 898                         );
 899                 }
 900
 901                 if ( isset( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] ) ) {
 902                         # (bug 14900) site config can override user-defined __INDEX__ or __NOINDEX__
 903                         $policy = array_merge(
 904                                 $policy,
 905                                 self::formatRobotPolicy( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] )
 906                         );
 907                 }
 908
 909                 return $policy;
 910         }
 911
 912         /**
 913          * Converts a String robot policy into an associative array, to allow
 914          * merging of several policies using array_merge().
 915          * @param array|string $policy Returns empty array on null/false/'', transparent
 916          *   to already-converted arrays, converts string.
 917          * @return array 'index' => \<indexpolicy\>, 'follow' => \<followpolicy\>
 918          */
 919         public static function formatRobotPolicy( $policy ) {
 920                 if ( is_array( $policy ) ) {
 921                         return $policy;
 922                 } elseif ( !$policy ) {
 923                         return [];
 924                 }
 925
 926                 $policy = explode( ',', $policy );
 927                 $policy = array_map( 'trim', $policy );
 928
 929                 $arr = [];
 930                 foreach ( $policy as $var ) {
 931                         if ( in_array( $var, [ 'index', 'noindex' ] ) ) {
 932                                 $arr['index'] = $var;
 933                         } elseif ( in_array( $var, [ 'follow', 'nofollow' ] ) ) {
 934                                 $arr['follow'] = $var;
 935                         }
 936                 }
 937
 938                 return $arr;
 939         }
 940
 941         /**
 942          * If this request is a redirect view, send "redirected from" subtitle to
 943          * the output. Returns true if the header was needed, false if this is not
 944          * a redirect view. Handles both local and remote redirects.
 945          *
 946          * @return bool
 947          */
 948         public function showRedirectedFromHeader() {
 949                 global $wgRedirectSources;
 950
 951                 $context = $this->getContext();
 952                 $outputPage = $context->getOutput();
 953                 $request = $context->getRequest();
 954                 $rdfrom = $request->getVal( 'rdfrom' );
 955
 956                 // Construct a URL for the current page view, but with the target title
 957                 $query = $request->getValues();
 958                 unset( $query['rdfrom'] );
 959                 unset( $query['title'] );
 960                 if ( $this->getTitle()->isRedirect() ) {
 961                         // Prevent double redirects
 962                         $query['redirect'] = 'no';
 963                 }
 964                 $redirectTargetUrl = $this->getTitle()->getLinkURL( $query );
 965
 966                 if ( isset( $this->mRedirectedFrom ) ) {
 967                         // This is an internally redirected page view.
 968                         // We'll need a backlink to the source page for navigation.
 969                         if ( Hooks::run( 'ArticleViewRedirect', [ &$this ] ) ) {
 970                                 $redir = Linker::linkKnown(
 971                                         $this->mRedirectedFrom,
 972                                         null,
 973                                         [],
 974                                         [ 'redirect' => 'no' ]
 975                                 );
 976
 977                                 $outputPage->addSubtitle( "<span class=\"mw-redirectedfrom\">" .
 978                                         $context->msg( 'redirectedfrom' )->rawParams( $redir )->parse()
 979                                 . "</span>" );
 980
 981                                 // Add the script to update the displayed URL and
 982                                 // set the fragment if one was specified in the redirect
 983                                 $outputPage->addJsConfigVars( [
 984                                         'wgInternalRedirectTargetUrl' => $redirectTargetUrl,
 985                                 ] );
 986                                 $outputPage->addModules( 'mediawiki.action.view.redirect' );
 987
 988                                 // Add a <link rel="canonical"> tag
 989                                 $outputPage->setCanonicalUrl( $this->getTitle()->getCanonicalURL() );
 990
 991                                 // Tell the output object that the user arrived at this article through a redirect
 992                                 $outputPage->setRedirectedFrom( $this->mRedirectedFrom );
 993
 994                                 return true;
 995                         }
 996                 } elseif ( $rdfrom ) {
 997                         // This is an externally redirected view, from some other wiki.
 998                         // If it was reported from a trusted site, supply a backlink.
 999                         if ( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
1000                                 $redir = Linker::makeExternalLink( $rdfrom, $rdfrom );
1001                                 $outputPage->addSubtitle( "<span class=\"mw-redirectedfrom\">" .
1002                                         $context->msg( 'redirectedfrom' )->rawParams( $redir )->parse()
1003                                 . "</span>" );
1004
1005                                 // Add the script to update the displayed URL
1006                                 $outputPage->addJsConfigVars( [
1007                                         'wgInternalRedirectTargetUrl' => $redirectTargetUrl,
1008                                 ] );
1009                                 $outputPage->addModules( 'mediawiki.action.view.redirect' );
1010
1011                                 return true;
1012                         }
1013                 }
1014
1015                 return false;
1016         }
1017
1018         /**
1019          * Show a header specific to the namespace currently being viewed, like
1020          * [[MediaWiki:Talkpagetext]]. For Article::view().
1021          */
1022         public function showNamespaceHeader() {
1023                 if ( $this->getTitle()->isTalkPage() ) {
1024                         if ( !wfMessage( 'talkpageheader' )->isDisabled() ) {
1025                                 $this->getContext()->getOutput()->wrapWikiMsg(
1026                                         "<div class=\"mw-talkpageheader\">\n$1\n</div>",
1027                                         [ 'talkpageheader' ]
1028                                 );
1029                         }
1030                 }
1031         }
1032
1033         /**
1034          * Show the footer section of an ordinary page view
1035          */
1036         public function showViewFooter() {
1037                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
1038                 if ( $this->getTitle()->getNamespace() == NS_USER_TALK
1039                         && IP::isValid( $this->getTitle()->getText() )
1040                 ) {
1041                         $this->getContext()->getOutput()->addWikiMsg( 'anontalkpagetext' );
1042                 }
1043
1044                 // Show a footer allowing the user to patrol the shown revision or page if possible
1045                 $patrolFooterShown = $this->showPatrolFooter();
1046
1047                 Hooks::run( 'ArticleViewFooter', [ $this, $patrolFooterShown ] );
1048         }
1049
1050         /**
1051          * If patrol is possible, output a patrol UI box. This is called from the
1052          * footer section of ordinary page views. If patrol is not possible or not
1053          * desired, does nothing.
1054          * Side effect: When the patrol link is build, this method will call
1055          * OutputPage::preventClickjacking() and load mediawiki.page.patrol.ajax.
1056          *
1057          * @return bool
1058          */
1059         public function showPatrolFooter() {
1060                 global $wgUseNPPatrol, $wgUseRCPatrol, $wgUseFilePatrol, $wgEnableAPI, $wgEnableWriteAPI;
1061
1062                 $outputPage = $this->getContext()->getOutput();
1063                 $user = $this->getContext()->getUser();
1064                 $title = $this->getTitle();
1065                 $rc = false;
1066
1067                 if ( !$title->quickUserCan( 'patrol', $user )
1068                         || !( $wgUseRCPatrol || $wgUseNPPatrol
1069                                 || ( $wgUseFilePatrol && $title->inNamespace( NS_FILE ) ) )
1070                 ) {
1071                         // Patrolling is disabled or the user isn't allowed to
1072                         return false;
1073                 }
1074
1075                 if ( $this->mRevision
1076                         && !RecentChange::isInRCLifespan( $this->mRevision->getTimestamp(), 21600 )
1077                 ) {
1078                         // The current revision is already older than what could be in the RC table
1079                         // 6h tolerance because the RC might not be cleaned out regularly
1080                         return false;
1081                 }
1082
1083                 // Check for cached results
1084                 $key = wfMemcKey( 'unpatrollable-page', $title->getArticleID() );
1085                 $cache = ObjectCache::getMainWANInstance();
1086                 if ( $cache->get( $key ) ) {
1087                         return false;
1088                 }
1089
1090                 $dbr = wfGetDB( DB_SLAVE );
1091                 $oldestRevisionTimestamp = $dbr->selectField(
1092                         'revision',
1093                         'MIN( rev_timestamp )',
1094                         [ 'rev_page' => $title->getArticleID() ],
1095                         __METHOD__
1096                 );
1097
1098                 // New page patrol: Get the timestamp of the oldest revison which
1099                 // the revision table holds for the given page. Then we look
1100                 // whether it's within the RC lifespan and if it is, we try
1101                 // to get the recentchanges row belonging to that entry
1102                 // (with rc_new = 1).
1103                 $recentPageCreation = false;
1104                 if ( $oldestRevisionTimestamp
1105                         && RecentChange::isInRCLifespan( $oldestRevisionTimestamp, 21600 )
1106                 ) {
1107                         // 6h tolerance because the RC might not be cleaned out regularly
1108                         $recentPageCreation = true;
1109                         $rc = RecentChange::newFromConds(
1110                                 [
1111                                         'rc_new' => 1,
1112                                         'rc_timestamp' => $oldestRevisionTimestamp,
1113                                         'rc_namespace' => $title->getNamespace(),
1114                                         'rc_cur_id' => $title->getArticleID()
1115                                 ],
1116                                 __METHOD__
1117                         );
1118                         if ( $rc ) {
1119                                 // Use generic patrol message for new pages
1120                                 $markPatrolledMsg = wfMessage( 'markaspatrolledtext' );
1121                         }
1122                 }
1123
1124                 // File patrol: Get the timestamp of the latest upload for this page,
1125                 // check whether it is within the RC lifespan and if it is, we try
1126                 // to get the recentchanges row belonging to that entry
1127                 // (with rc_type = RC_LOG, rc_log_type = upload).
1128                 $recentFileUpload = false;
1129                 if ( ( !$rc || $rc->getAttribute( 'rc_patrolled' ) ) && $wgUseFilePatrol
1130                         && $title->getNamespace() === NS_FILE ) {
1131                         // Retrieve timestamp of most recent upload
1132                         $newestUploadTimestamp = $dbr->selectField(
1133                                 'image',
1134                                 'MAX( img_timestamp )',
1135                                 [ 'img_name' => $title->getDBkey() ],
1136                                 __METHOD__
1137                         );
1138                         if ( $newestUploadTimestamp
1139                                 && RecentChange::isInRCLifespan( $newestUploadTimestamp, 21600 )
1140                         ) {
1141                                 // 6h tolerance because the RC might not be cleaned out regularly
1142                                 $recentFileUpload = true;
1143                                 $rc = RecentChange::newFromConds(
1144                                         [
1145                                                 'rc_type' => RC_LOG,
1146                                                 'rc_log_type' => 'upload',
1147                                                 'rc_timestamp' => $newestUploadTimestamp,
1148                                                 'rc_namespace' => NS_FILE,
1149                                                 'rc_cur_id' => $title->getArticleID()
1150                                         ],
1151                                         __METHOD__,
1152                                         [ 'USE INDEX' => 'rc_timestamp' ]
1153                                 );
1154                                 if ( $rc ) {
1155                                         // Use patrol message specific to files
1156                                         $markPatrolledMsg = wfMessage( 'markaspatrolledtext-file' );
1157                                 }
1158                         }
1159                 }
1160
1161                 if ( !$recentPageCreation && !$recentFileUpload ) {
1162                         // Page creation and latest upload (for files) is too old to be in RC
1163
1164                         // We definitely can't patrol so cache the information
1165                         // When a new file version is uploaded, the cache is cleared
1166                         $cache->set( $key, '1' );
1167
1168                         return false;
1169                 }
1170
1171                 if ( !$rc ) {
1172                         // Don't cache: This can be hit if the page gets accessed very fast after
1173                         // its creation / latest upload or in case we have high slave lag. In case
1174                         // the revision is too old, we will already return above.
1175                         return false;
1176                 }
1177
1178                 if ( $rc->getAttribute( 'rc_patrolled' ) ) {
1179                         // Patrolled RC entry around
1180
1181                         // Cache the information we gathered above in case we can't patrol
1182                         // Don't cache in case we can patrol as this could change
1183                         $cache->set( $key, '1' );
1184
1185                         return false;
1186                 }
1187
1188                 if ( $rc->getPerformer()->equals( $user ) ) {
1189                         // Don't show a patrol link for own creations/uploads. If the user could
1190                         // patrol them, they already would be patrolled
1191                         return false;
1192                 }
1193
1194                 $rcid = $rc->getAttribute( 'rc_id' );
1195
1196                 $token = $user->getEditToken( $rcid );
1197
1198                 $outputPage->preventClickjacking();
1199                 if ( $wgEnableAPI && $wgEnableWriteAPI && $user->isAllowed( 'writeapi' ) ) {
1200                         $outputPage->addModules( 'mediawiki.page.patrol.ajax' );
1201                 }
1202
1203                 $link = Linker::linkKnown(
1204                         $title,
1205                         $markPatrolledMsg->escaped(),
1206                         [],
1207                         [
1208                                 'action' => 'markpatrolled',
1209                                 'rcid' => $rcid,
1210                                 'token' => $token,
1211                         ]
1212                 );
1213
1214                 $outputPage->addHTML(
1215                         "<div class='patrollink' data-mw='interface'>" .
1216                                 wfMessage( 'markaspatrolledlink' )->rawParams( $link )->escaped() .
1217                         '</div>'
1218                 );
1219
1220                 return true;
1221         }
1222
1223         /**
1224          * Purge the cache used to check if it is worth showing the patrol footer
1225          * For example, it is done during re-uploads when file patrol is used.
1226          * @param int $articleID ID of the article to purge
1227          * @since 1.27
1228          */
1229         public static function purgePatrolFooterCache( $articleID ) {
1230                 $cache = ObjectCache::getMainWANInstance();
1231                 $cache->delete( wfMemcKey( 'unpatrollable-page', $articleID ) );
1232         }
1233
1234         /**
1235          * Show the error text for a missing article. For articles in the MediaWiki
1236          * namespace, show the default message text. To be called from Article::view().
1237          */
1238         public function showMissingArticle() {
1239                 global $wgSend404Code;
1240
1241                 $outputPage = $this->getContext()->getOutput();
1242                 // Whether the page is a root user page of an existing user (but not a subpage)
1243                 $validUserPage = false;
1244
1245                 $title = $this->getTitle();
1246
1247                 # Show info in user (talk) namespace. Does the user exist? Is he blocked?
1248                 if ( $title->getNamespace() == NS_USER
1249                         || $title->getNamespace() == NS_USER_TALK
1250                 ) {
1251                         $rootPart = explode( '/', $title->getText() )[0];
1252                         $user = User::newFromName( $rootPart, false /* allow IP users*/ );
1253                         $ip = User::isIP( $rootPart );
1254                         $block = Block::newFromTarget( $user, $user );
1255
1256                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
1257                                 $outputPage->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n\$1\n</div>",
1258                                         [ 'userpage-userdoesnotexist-view', wfEscapeWikiText( $rootPart ) ] );
1259                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
1260                                 # Show log extract if the user is currently blocked
1261                                 LogEventsList::showLogExtract(
1262                                         $outputPage,
1263                                         'block',
1264                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
1265                                         '',
1266                                         [
1267                                                 'lim' => 1,
1268                                                 'showIfEmpty' => false,
1269                                                 'msgKey' => [
1270                                                         'blocked-notice-logextract',
1271                                                         $user->getName() # Support GENDER in notice
1272                                                 ]
1273                                         ]
1274                                 );
1275                                 $validUserPage = !$title->isSubpage();
1276                         } else {
1277                                 $validUserPage = !$title->isSubpage();
1278                         }
1279                 }
1280
1281                 Hooks::run( 'ShowMissingArticle', [ $this ] );
1282
1283                 # Show delete and move logs if there were any such events.
1284                 # The logging query can DOS the site when bots/crawlers cause 404 floods,
1285                 # so be careful showing this. 404 pages must be cheap as they are hard to cache.
1286                 $cache = ObjectCache::getMainStashInstance();
1287                 $key = wfMemcKey( 'page-recent-delete', md5( $title->getPrefixedText() ) );
1288                 $loggedIn = $this->getContext()->getUser()->isLoggedIn();
1289                 if ( $loggedIn || $cache->get( $key ) ) {
1290                         $logTypes = [ 'delete', 'move' ];
1291                         $conds = [ "log_action != 'revision'" ];
1292                         // Give extensions a chance to hide their (unrelated) log entries
1293                         Hooks::run( 'Article::MissingArticleConditions', [ &$conds, $logTypes ] );
1294                         LogEventsList::showLogExtract(
1295                                 $outputPage,
1296                                 $logTypes,
1297                                 $title,
1298                                 '',
1299                                 [
1300                                         'lim' => 10,
1301                                         'conds' => $conds,
1302                                         'showIfEmpty' => false,
1303                                         'msgKey' => [ $loggedIn
1304                                                 ? 'moveddeleted-notice'
1305                                                 : 'moveddeleted-notice-recent'
1306                                         ]
1307                                 ]
1308                         );
1309                 }
1310
1311                 if ( !$this->mPage->hasViewableContent() && $wgSend404Code && !$validUserPage ) {
1312                         // If there's no backing content, send a 404 Not Found
1313                         // for better machine handling of broken links.
1314                         $this->getContext()->getRequest()->response()->statusHeader( 404 );
1315                 }
1316
1317                 // Also apply the robot policy for nonexisting pages (even if a 404 was used for sanity)
1318                 $policy = $this->getRobotPolicy( 'view' );
1319                 $outputPage->setIndexPolicy( $policy['index'] );
1320                 $outputPage->setFollowPolicy( $policy['follow'] );
1321
1322                 $hookResult = Hooks::run( 'BeforeDisplayNoArticleText', [ $this ] );
1323
1324                 if ( !$hookResult ) {
1325                         return;
1326                 }
1327
1328                 # Show error message
1329                 $oldid = $this->getOldID();
1330                 if ( !$oldid && $title->getNamespace() === NS_MEDIAWIKI && $title->hasSourceText() ) {
1331                         $outputPage->addParserOutput( $this->getContentObject()->getParserOutput( $title ) );
1332                 } else {
1333                         if ( $oldid ) {
1334                                 $text = wfMessage( 'missing-revision', $oldid )->plain();
1335                         } elseif ( $title->quickUserCan( 'create', $this->getContext()->getUser() )
1336                                 && $title->quickUserCan( 'edit', $this->getContext()->getUser() )
1337                         ) {
1338                                 $message = $this->getContext()->getUser()->isLoggedIn() ? 'noarticletext' : 'noarticletextanon';
1339                                 $text = wfMessage( $message )->plain();
1340                         } else {
1341                                 $text = wfMessage( 'noarticletext-nopermission' )->plain();
1342                         }
1343
1344                         $dir = $this->getContext()->getLanguage()->getDir();
1345                         $lang = $this->getContext()->getLanguage()->getCode();
1346                         $outputPage->addWikiText( Xml::openElement( 'div', [
1347                                 'class' => "noarticletext mw-content-$dir",
1348                                 'dir' => $dir,
1349                                 'lang' => $lang,
1350                         ] ) . "\n$text\n</div>" );
1351                 }
1352         }
1353
1354         /**
1355          * If the revision requested for view is deleted, check permissions.
1356          * Send either an error message or a warning header to the output.
1357          *
1358          * @return bool True if the view is allowed, false if not.
1359          */
1360         public function showDeletedRevisionHeader() {
1361                 if ( !$this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1362                         // Not deleted
1363                         return true;
1364                 }
1365
1366                 $outputPage = $this->getContext()->getOutput();
1367                 $user = $this->getContext()->getUser();
1368                 // If the user is not allowed to see it...
1369                 if ( !$this->mRevision->userCan( Revision::DELETED_TEXT, $user ) ) {
1370                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1371                                 'rev-deleted-text-permission' );
1372
1373                         return false;
1374                 // If the user needs to confirm that they want to see it...
1375                 } elseif ( $this->getContext()->getRequest()->getInt( 'unhide' ) != 1 ) {
1376                         # Give explanation and add a link to view the revision...
1377                         $oldid = intval( $this->getOldID() );
1378                         $link = $this->getTitle()->getFullURL( "oldid={$oldid}&unhide=1" );
1379                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1380                                 'rev-suppressed-text-unhide' : 'rev-deleted-text-unhide';
1381                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1382                                 [ $msg, $link ] );
1383
1384                         return false;
1385                 // We are allowed to see...
1386                 } else {
1387                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1388                                 'rev-suppressed-text-view' : 'rev-deleted-text-view';
1389                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", $msg );
1390
1391                         return true;
1392                 }
1393         }
1394
1395         /**
1396          * Generate the navigation links when browsing through an article revisions
1397          * It shows the information as:
1398          *   Revision as of \<date\>; view current revision
1399          *   \<- Previous version | Next Version -\>
1400          *
1401          * @param int $oldid Revision ID of this article revision
1402          */
1403         public function setOldSubtitle( $oldid = 0 ) {
1404                 if ( !Hooks::run( 'DisplayOldSubtitle', [ &$this, &$oldid ] ) ) {
1405                         return;
1406                 }
1407
1408                 $context = $this->getContext();
1409                 $unhide = $context->getRequest()->getInt( 'unhide' ) == 1;
1410
1411                 # Cascade unhide param in links for easy deletion browsing
1412                 $extraParams = [];
1413                 if ( $unhide ) {
1414                         $extraParams['unhide'] = 1;
1415                 }
1416
1417                 if ( $this->mRevision && $this->mRevision->getId() === $oldid ) {
1418                         $revision = $this->mRevision;
1419                 } else {
1420                         $revision = Revision::newFromId( $oldid );
1421                 }
1422
1423                 $timestamp = $revision->getTimestamp();
1424
1425                 $current = ( $oldid == $this->mPage->getLatest() );
1426                 $language = $context->getLanguage();
1427                 $user = $context->getUser();
1428
1429                 $td = $language->userTimeAndDate( $timestamp, $user );
1430                 $tddate = $language->userDate( $timestamp, $user );
1431                 $tdtime = $language->userTime( $timestamp, $user );
1432
1433                 # Show user links if allowed to see them. If hidden, then show them only if requested...
1434                 $userlinks = Linker::revUserTools( $revision, !$unhide );
1435
1436                 $infomsg = $current && !$context->msg( 'revision-info-current' )->isDisabled()
1437                         ? 'revision-info-current'
1438                         : 'revision-info';
1439
1440                 $outputPage = $context->getOutput();
1441                 $outputPage->addSubtitle( "<div id=\"mw-{$infomsg}\">" .
1442                         $context->msg( $infomsg, $td )
1443                                 ->rawParams( $userlinks )
1444                                 ->params( $revision->getId(), $tddate, $tdtime, $revision->getUserText() )
1445                                 ->rawParams( Linker::revComment( $revision, true, true ) )
1446                                 ->parse() .
1447                         "</div>"
1448                 );
1449
1450                 $lnk = $current
1451                         ? $context->msg( 'currentrevisionlink' )->escaped()
1452                         : Linker::linkKnown(
1453                                 $this->getTitle(),
1454                                 $context->msg( 'currentrevisionlink' )->escaped(),
1455                                 [],
1456                                 $extraParams
1457                         );
1458                 $curdiff = $current
1459                         ? $context->msg( 'diff' )->escaped()
1460                         : Linker::linkKnown(
1461                                 $this->getTitle(),
1462                                 $context->msg( 'diff' )->escaped(),
1463                                 [],
1464                                 [
1465                                         'diff' => 'cur',
1466                                         'oldid' => $oldid
1467                                 ] + $extraParams
1468                         );
1469                 $prev = $this->getTitle()->getPreviousRevisionID( $oldid );
1470                 $prevlink = $prev
1471                         ? Linker::linkKnown(
1472                                 $this->getTitle(),
1473                                 $context->msg( 'previousrevision' )->escaped(),
1474                                 [],
1475                                 [
1476                                         'direction' => 'prev',
1477                                         'oldid' => $oldid
1478                                 ] + $extraParams
1479                         )
1480                         : $context->msg( 'previousrevision' )->escaped();
1481                 $prevdiff = $prev
1482                         ? Linker::linkKnown(
1483                                 $this->getTitle(),
1484                                 $context->msg( 'diff' )->escaped(),
1485                                 [],
1486                                 [
1487                                         'diff' => 'prev',
1488                                         'oldid' => $oldid
1489                                 ] + $extraParams
1490                         )
1491                         : $context->msg( 'diff' )->escaped();
1492                 $nextlink = $current
1493                         ? $context->msg( 'nextrevision' )->escaped()
1494                         : Linker::linkKnown(
1495                                 $this->getTitle(),
1496                                 $context->msg( 'nextrevision' )->escaped(),
1497                                 [],
1498                                 [
1499                                         'direction' => 'next',
1500                                         'oldid' => $oldid
1501                                 ] + $extraParams
1502                         );
1503                 $nextdiff = $current
1504                         ? $context->msg( 'diff' )->escaped()
1505                         : Linker::linkKnown(
1506                                 $this->getTitle(),
1507                                 $context->msg( 'diff' )->escaped(),
1508                                 [],
1509                                 [
1510                                         'diff' => 'next',
1511                                         'oldid' => $oldid
1512                                 ] + $extraParams
1513                         );
1514
1515                 $cdel = Linker::getRevDeleteLink( $user, $revision, $this->getTitle() );
1516                 if ( $cdel !== '' ) {
1517                         $cdel .= ' ';
1518                 }
1519
1520                 $outputPage->addSubtitle( "<div id=\"mw-revision-nav\">" . $cdel .
1521                         $context->msg( 'revision-nav' )->rawParams(
1522                                 $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff
1523                         )->escaped() . "</div>" );
1524         }
1525
1526         /**
1527          * Return the HTML for the top of a redirect page
1528          *
1529          * Chances are you should just be using the ParserOutput from
1530          * WikitextContent::getParserOutput instead of calling this for redirects.
1531          *
1532          * @param Title|array $target Destination(s) to redirect
1533          * @param bool $appendSubtitle [optional]
1534          * @param bool $forceKnown Should the image be shown as a bluelink regardless of existence?
1535          * @return string Containing HTML with redirect link
1536          */
1537         public function viewRedirect( $target, $appendSubtitle = true, $forceKnown = false ) {
1538                 $lang = $this->getTitle()->getPageLanguage();
1539                 $out = $this->getContext()->getOutput();
1540                 if ( $appendSubtitle ) {
1541                         $out->addSubtitle( wfMessage( 'redirectpagesub' ) );
1542                 }
1543                 $out->addModuleStyles( 'mediawiki.action.view.redirectPage' );
1544                 return static::getRedirectHeaderHtml( $lang, $target, $forceKnown );
1545         }
1546
1547         /**
1548          * Return the HTML for the top of a redirect page
1549          *
1550          * Chances are you should just be using the ParserOutput from
1551          * WikitextContent::getParserOutput instead of calling this for redirects.
1552          *
1553          * @since 1.23
1554          * @param Language $lang
1555          * @param Title|array $target Destination(s) to redirect
1556          * @param bool $forceKnown Should the image be shown as a bluelink regardless of existence?
1557          * @return string Containing HTML with redirect link
1558          */
1559         public static function getRedirectHeaderHtml( Language $lang, $target, $forceKnown = false ) {
1560                 if ( !is_array( $target ) ) {
1561                         $target = [ $target ];
1562                 }
1563
1564                 $html = '<ul class="redirectText">';
1565                 /** @var Title $title */
1566                 foreach ( $target as $title ) {
1567                         $html .= '<li>' . Linker::link(
1568                                 $title,
1569                                 htmlspecialchars( $title->getFullText() ),
1570                                 [],
1571                                 // Make sure wiki page redirects are not followed
1572                                 $title->isRedirect() ? [ 'redirect' => 'no' ] : [],
1573                                 ( $forceKnown ? [ 'known', 'noclasses' ] : [] )
1574                         ) . '</li>';
1575                 }
1576                 $html .= '</ul>';
1577
1578                 $redirectToText = wfMessage( 'redirectto' )->inLanguage( $lang )->escaped();
1579
1580                 return '<div class="redirectMsg">' .
1581                         '<p>' . $redirectToText . '</p>' .
1582                         $html .
1583                         '</div>';
1584         }
1585
1586         /**
1587          * Adds help link with an icon via page indicators.
1588          * Link target can be overridden by a local message containing a wikilink:
1589          * the message key is: 'namespace-' + namespace number + '-helppage'.
1590          * @param string $to Target MediaWiki.org page title or encoded URL.
1591          * @param bool $overrideBaseUrl Whether $url is a full URL, to avoid MW.o.
1592          * @since 1.25
1593          */
1594         public function addHelpLink( $to, $overrideBaseUrl = false ) {
1595                 $msg = wfMessage(
1596                         'namespace-' . $this->getTitle()->getNamespace() . '-helppage'
1597                 );
1598
1599                 $out = $this->getContext()->getOutput();
1600                 if ( !$msg->isDisabled() ) {
1601                         $helpUrl = Skin::makeUrl( $msg->plain() );
1602                         $out->addHelpLink( $helpUrl, true );
1603                 } else {
1604                         $out->addHelpLink( $to, $overrideBaseUrl );
1605                 }
1606         }
1607
1608         /**
1609          * Handle action=render
1610          */
1611         public function render() {
1612                 $this->getContext()->getRequest()->response()->header( 'X-Robots-Tag: noindex' );
1613                 $this->getContext()->getOutput()->setArticleBodyOnly( true );
1614                 $this->getContext()->getOutput()->enableSectionEditLinks( false );
1615                 $this->view();
1616         }
1617
1618         /**
1619          * action=protect handler
1620          */
1621         public function protect() {
1622                 $form = new ProtectionForm( $this );
1623                 $form->execute();
1624         }
1625
1626         /**
1627          * action=unprotect handler (alias)
1628          */
1629         public function unprotect() {
1630                 $this->protect();
1631         }
1632
1633         /**
1634          * UI entry point for page deletion
1635          */
1636         public function delete() {
1637                 # This code desperately needs to be totally rewritten
1638
1639                 $title = $this->getTitle();
1640                 $context = $this->getContext();
1641                 $user = $context->getUser();
1642                 $request = $context->getRequest();
1643
1644                 # Check permissions
1645                 $permissionErrors = $title->getUserPermissionsErrors( 'delete', $user );
1646                 if ( count( $permissionErrors ) ) {
1647                         throw new PermissionsError( 'delete', $permissionErrors );
1648                 }
1649
1650                 # Read-only check...
1651                 if ( wfReadOnly() ) {
1652                         throw new ReadOnlyError;
1653                 }
1654
1655                 # Better double-check that it hasn't been deleted yet!
1656                 $this->mPage->loadPageData(
1657                         $request->wasPosted() ? WikiPage::READ_LATEST : WikiPage::READ_NORMAL
1658                 );
1659                 if ( !$this->mPage->exists() ) {
1660                         $deleteLogPage = new LogPage( 'delete' );
1661                         $outputPage = $context->getOutput();
1662                         $outputPage->setPageTitle( $context->msg( 'cannotdelete-title', $title->getPrefixedText() ) );
1663                         $outputPage->wrapWikiMsg( "<div class=\"error mw-error-cannotdelete\">\n$1\n</div>",
1664                                         [ 'cannotdelete', wfEscapeWikiText( $title->getPrefixedText() ) ]
1665                                 );
1666                         $outputPage->addHTML(
1667                                 Xml::element( 'h2', null, $deleteLogPage->getName()->text() )
1668                         );
1669                         LogEventsList::showLogExtract(
1670                                 $outputPage,
1671                                 'delete',
1672                                 $title
1673                         );
1674
1675                         return;
1676                 }
1677
1678                 $deleteReasonList = $request->getText( 'wpDeleteReasonList', 'other' );
1679                 $deleteReason = $request->getText( 'wpReason' );
1680
1681                 if ( $deleteReasonList == 'other' ) {
1682                         $reason = $deleteReason;
1683                 } elseif ( $deleteReason != '' ) {
1684                         // Entry from drop down menu + additional comment
1685                         $colonseparator = wfMessage( 'colon-separator' )->inContentLanguage()->text();
1686                         $reason = $deleteReasonList . $colonseparator . $deleteReason;
1687                 } else {
1688                         $reason = $deleteReasonList;
1689                 }
1690
1691                 if ( $request->wasPosted() && $user->matchEditToken( $request->getVal( 'wpEditToken' ),
1692                         [ 'delete', $this->getTitle()->getPrefixedText() ] )
1693                 ) {
1694                         # Flag to hide all contents of the archived revisions
1695                         $suppress = $request->getVal( 'wpSuppress' ) && $user->isAllowed( 'suppressrevision' );
1696
1697                         $this->doDelete( $reason, $suppress );
1698
1699                         WatchAction::doWatchOrUnwatch( $request->getCheck( 'wpWatch' ), $title, $user );
1700
1701                         return;
1702                 }
1703
1704                 // Generate deletion reason
1705                 $hasHistory = false;
1706                 if ( !$reason ) {
1707                         try {
1708                                 $reason = $this->generateReason( $hasHistory );
1709                         } catch ( Exception $e ) {
1710                                 # if a page is horribly broken, we still want to be able to
1711                                 # delete it. So be lenient about errors here.
1712                                 wfDebug( "Error while building auto delete summary: $e" );
1713                                 $reason = '';
1714                         }
1715                 }
1716
1717                 // If the page has a history, insert a warning
1718                 if ( $hasHistory ) {
1719                         $title = $this->getTitle();
1720
1721                         // The following can use the real revision count as this is only being shown for users
1722                         // that can delete this page.
1723                         // This, as a side-effect, also makes sure that the following query isn't being run for
1724                         // pages with a larger history, unless the user has the 'bigdelete' right
1725                         // (and is about to delete this page).
1726                         $dbr = wfGetDB( DB_SLAVE );
1727                         $revisions = $edits = (int)$dbr->selectField(
1728                                 'revision',
1729                                 'COUNT(rev_page)',
1730                                 [ 'rev_page' => $title->getArticleID() ],
1731                                 __METHOD__
1732                         );
1733
1734                         // @todo FIXME: i18n issue/patchwork message
1735                         $context->getOutput()->addHTML(
1736                                 '<strong class="mw-delete-warning-revisions">' .
1737                                 $context->msg( 'historywarning' )->numParams( $revisions )->parse() .
1738                                 $context->msg( 'word-separator' )->escaped() . Linker::linkKnown( $title,
1739                                         $context->msg( 'history' )->escaped(),
1740                                         [],
1741                                         [ 'action' => 'history' ] ) .
1742                                 '</strong>'
1743                         );
1744
1745                         if ( $title->isBigDeletion() ) {
1746                                 global $wgDeleteRevisionsLimit;
1747                                 $context->getOutput()->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
1748                                         [
1749                                                 'delete-warning-toobig',
1750                                                 $context->getLanguage()->formatNum( $wgDeleteRevisionsLimit )
1751                                         ]
1752                                 );
1753                         }
1754                 }
1755
1756                 $this->confirmDelete( $reason );
1757         }
1758
1759         /**
1760          * Output deletion confirmation dialog
1761          * @todo FIXME: Move to another file?
1762          * @param string $reason Prefilled reason
1763          */
1764         public function confirmDelete( $reason ) {
1765                 wfDebug( "Article::confirmDelete\n" );
1766
1767                 $title = $this->getTitle();
1768                 $ctx = $this->getContext();
1769                 $outputPage = $ctx->getOutput();
1770                 $useMediaWikiUIEverywhere = $ctx->getConfig()->get( 'UseMediaWikiUIEverywhere' );
1771                 $outputPage->setPageTitle( wfMessage( 'delete-confirm', $title->getPrefixedText() ) );
1772                 $outputPage->addBacklinkSubtitle( $title );
1773                 $outputPage->setRobotPolicy( 'noindex,nofollow' );
1774                 $backlinkCache = $title->getBacklinkCache();
1775                 if ( $backlinkCache->hasLinks( 'pagelinks' ) || $backlinkCache->hasLinks( 'templatelinks' ) ) {
1776                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1777                                 'deleting-backlinks-warning' );
1778                 }
1779                 $outputPage->addWikiMsg( 'confirmdeletetext' );
1780
1781                 Hooks::run( 'ArticleConfirmDelete', [ $this, $outputPage, &$reason ] );
1782
1783                 $user = $this->getContext()->getUser();
1784
1785                 if ( $user->isAllowed( 'suppressrevision' ) ) {
1786                         $suppress = Html::openElement( 'div', [ 'id' => 'wpDeleteSuppressRow' ] ) .
1787                                 Xml::checkLabel( wfMessage( 'revdelete-suppress' )->text(),
1788                                         'wpSuppress', 'wpSuppress', false, [ 'tabindex' => '4' ] ) .
1789                                 Html::closeElement( 'div' );
1790                 } else {
1791                         $suppress = '';
1792                 }
1793                 $checkWatch = $user->getBoolOption( 'watchdeletion' ) || $user->isWatched( $title );
1794
1795                 $form = Html::openElement( 'form', [ 'method' => 'post',
1796                         'action' => $title->getLocalURL( 'action=delete' ), 'id' => 'deleteconfirm' ] ) .
1797                         Html::openElement( 'fieldset', [ 'id' => 'mw-delete-table' ] ) .
1798                         Html::element( 'legend', null, wfMessage( 'delete-legend' )->text() ) .
1799                         Html::openElement( 'div', [ 'id' => 'mw-deleteconfirm-table' ] ) .
1800                         Html::openElement( 'div', [ 'id' => 'wpDeleteReasonListRow' ] ) .
1801                         Html::label( wfMessage( 'deletecomment' )->text(), 'wpDeleteReasonList' ) .
1802                         '&nbsp;' .
1803                         Xml::listDropDown(
1804                                 'wpDeleteReasonList',
1805                                 wfMessage( 'deletereason-dropdown' )->inContentLanguage()->text(),
1806                                 wfMessage( 'deletereasonotherlist' )->inContentLanguage()->text(),
1807                                 '',
1808                                 'wpReasonDropDown',
1809                                 1
1810                         ) .
1811                         Html::closeElement( 'div' ) .
1812                         Html::openElement( 'div', [ 'id' => 'wpDeleteReasonRow' ] ) .
1813                         Html::label( wfMessage( 'deleteotherreason' )->text(), 'wpReason' ) .
1814                         '&nbsp;' .
1815                         Html::input( 'wpReason', $reason, 'text', [
1816                                 'size' => '60',
1817                                 'maxlength' => '255',
1818                                 'tabindex' => '2',
1819                                 'id' => 'wpReason',
1820                                 'class' => 'mw-ui-input-inline',
1821                                 'autofocus'
1822                         ] ) .
1823                         Html::closeElement( 'div' );
1824
1825                 # Disallow watching if user is not logged in
1826                 if ( $user->isLoggedIn() ) {
1827                         $form .=
1828                                         Xml::checkLabel( wfMessage( 'watchthis' )->text(),
1829                                                 'wpWatch', 'wpWatch', $checkWatch, [ 'tabindex' => '3' ] );
1830                 }
1831
1832                 $form .=
1833                                 Html::openElement( 'div' ) .
1834                                 $suppress .
1835                                         Xml::submitButton( wfMessage( 'deletepage' )->text(),
1836                                                 [
1837                                                         'name' => 'wpConfirmB',
1838                                                         'id' => 'wpConfirmB',
1839                                                         'tabindex' => '5',
1840                                                         'class' => $useMediaWikiUIEverywhere ? 'mw-ui-button mw-ui-destructive' : '',
1841                                                 ]
1842                                         ) .
1843                                 Html::closeElement( 'div' ) .
1844                         Html::closeElement( 'div' ) .
1845                         Xml::closeElement( 'fieldset' ) .
1846                         Html::hidden(
1847                                 'wpEditToken',
1848                                 $user->getEditToken( [ 'delete', $title->getPrefixedText() ] )
1849                         ) .
1850                         Xml::closeElement( 'form' );
1851
1852                         if ( $user->isAllowed( 'editinterface' ) ) {
1853                                 $link = Linker::linkKnown(
1854                                         $ctx->msg( 'deletereason-dropdown' )->inContentLanguage()->getTitle(),
1855                                         wfMessage( 'delete-edit-reasonlist' )->escaped(),
1856                                         [],
1857                                         [ 'action' => 'edit' ]
1858                                 );
1859                                 $form .= '<p class="mw-delete-editreasons">' . $link . '</p>';
1860                         }
1861
1862                 $outputPage->addHTML( $form );
1863
1864                 $deleteLogPage = new LogPage( 'delete' );
1865                 $outputPage->addHTML( Xml::element( 'h2', null, $deleteLogPage->getName()->text() ) );
1866                 LogEventsList::showLogExtract( $outputPage, 'delete', $title );
1867         }
1868
1869         /**
1870          * Perform a deletion and output success or failure messages
1871          * @param string $reason
1872          * @param bool $suppress
1873          */
1874         public function doDelete( $reason, $suppress = false ) {
1875                 $error = '';
1876                 $context = $this->getContext();
1877                 $outputPage = $context->getOutput();
1878                 $user = $context->getUser();
1879                 $status = $this->mPage->doDeleteArticleReal( $reason, $suppress, 0, true, $error, $user );
1880
1881                 if ( $status->isGood() ) {
1882                         $deleted = $this->getTitle()->getPrefixedText();
1883
1884                         $outputPage->setPageTitle( wfMessage( 'actioncomplete' ) );
1885                         $outputPage->setRobotPolicy( 'noindex,nofollow' );
1886
1887                         $loglink = '[[Special:Log/delete|' . wfMessage( 'deletionlog' )->text() . ']]';
1888
1889                         $outputPage->addWikiMsg( 'deletedtext', wfEscapeWikiText( $deleted ), $loglink );
1890
1891                         Hooks::run( 'ArticleDeleteAfterSuccess', [ $this->getTitle(), $outputPage ] );
1892
1893                         $outputPage->returnToMain( false );
1894                 } else {
1895                         $outputPage->setPageTitle(
1896                                 wfMessage( 'cannotdelete-title',
1897                                         $this->getTitle()->getPrefixedText() )
1898                         );
1899
1900                         if ( $error == '' ) {
1901                                 $outputPage->addWikiText(
1902                                         "<div class=\"error mw-error-cannotdelete\">\n" . $status->getWikiText() . "\n</div>"
1903                                 );
1904                                 $deleteLogPage = new LogPage( 'delete' );
1905                                 $outputPage->addHTML( Xml::element( 'h2', null, $deleteLogPage->getName()->text() ) );
1906
1907                                 LogEventsList::showLogExtract(
1908                                         $outputPage,
1909                                         'delete',
1910                                         $this->getTitle()
1911                                 );
1912                         } else {
1913                                 $outputPage->addHTML( $error );
1914                         }
1915                 }
1916         }
1917
1918         /* Caching functions */
1919
1920         /**
1921          * checkLastModified returns true if it has taken care of all
1922          * output to the client that is necessary for this request.
1923          * (that is, it has sent a cached version of the page)
1924          *
1925          * @return bool True if cached version send, false otherwise
1926          */
1927         protected function tryFileCache() {
1928                 static $called = false;
1929
1930                 if ( $called ) {
1931                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
1932                         return false;
1933                 }
1934
1935                 $called = true;
1936                 if ( $this->isFileCacheable() ) {
1937                         $cache = new HTMLFileCache( $this->getTitle(), 'view' );
1938                         if ( $cache->isCacheGood( $this->mPage->getTouched() ) ) {
1939                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
1940                                 $cache->loadFromFileCache( $this->getContext() );
1941                                 return true;
1942                         } else {
1943                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
1944                                 ob_start( [ &$cache, 'saveToFileCache' ] );
1945                         }
1946                 } else {
1947                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
1948                 }
1949
1950                 return false;
1951         }
1952
1953         /**
1954          * Check if the page can be cached
1955          * @return bool
1956          */
1957         public function isFileCacheable() {
1958                 $cacheable = false;
1959
1960                 if ( HTMLFileCache::useFileCache( $this->getContext() ) ) {
1961                         $cacheable = $this->mPage->getId()
1962                                 && !$this->mRedirectedFrom && !$this->getTitle()->isRedirect();
1963                         // Extension may have reason to disable file caching on some pages.
1964                         if ( $cacheable ) {
1965                                 $cacheable = Hooks::run( 'IsFileCacheable', [ &$this ] );
1966                         }
1967                 }
1968
1969                 return $cacheable;
1970         }
1971
1972         /**#@-*/
1973
1974         /**
1975          * Lightweight method to get the parser output for a page, checking the parser cache
1976          * and so on. Doesn't consider most of the stuff that WikiPage::view is forced to
1977          * consider, so it's not appropriate to use there.
1978          *
1979          * @since 1.16 (r52326) for LiquidThreads
1980          *
1981          * @param int|null $oldid Revision ID or null
1982          * @param User $user The relevant user
1983          * @return ParserOutput|bool ParserOutput or false if the given revision ID is not found
1984          */
1985         public function getParserOutput( $oldid = null, User $user = null ) {
1986                 // XXX: bypasses mParserOptions and thus setParserOptions()
1987
1988                 if ( $user === null ) {
1989                         $parserOptions = $this->getParserOptions();
1990                 } else {
1991                         $parserOptions = $this->mPage->makeParserOptions( $user );
1992                 }
1993
1994                 return $this->mPage->getParserOutput( $parserOptions, $oldid );
1995         }
1996
1997         /**
1998          * Override the ParserOptions used to render the primary article wikitext.
1999          *
2000          * @param ParserOptions $options
2001          * @throws MWException If the parser options where already initialized.
2002          */
2003         public function setParserOptions( ParserOptions $options ) {
2004                 if ( $this->mParserOptions ) {
2005                         throw new MWException( "can't change parser options after they have already been set" );
2006                 }
2007
2008                 // clone, so if $options is modified later, it doesn't confuse the parser cache.
2009                 $this->mParserOptions = clone $options;
2010         }
2011
2012         /**
2013          * Get parser options suitable for rendering the primary article wikitext
2014          * @return ParserOptions
2015          */
2016         public function getParserOptions() {
2017                 if ( !$this->mParserOptions ) {
2018                         $this->mParserOptions = $this->mPage->makeParserOptions( $this->getContext() );
2019                 }
2020                 // Clone to allow modifications of the return value without affecting cache
2021                 return clone $this->mParserOptions;
2022         }
2023
2024         /**
2025          * Sets the context this Article is executed in
2026          *
2027          * @param IContextSource $context
2028          * @since 1.18
2029          */
2030         public function setContext( $context ) {
2031                 $this->mContext = $context;
2032         }
2033
2034         /**
2035          * Gets the context this Article is executed in
2036          *
2037          * @return IContextSource
2038          * @since 1.18
2039          */
2040         public function getContext() {
2041                 if ( $this->mContext instanceof IContextSource ) {
2042                         return $this->mContext;
2043                 } else {
2044                         wfDebug( __METHOD__ . " called and \$mContext is null. " .
2045                                 "Return RequestContext::getMain(); for sanity\n" );
2046                         return RequestContext::getMain();
2047                 }
2048         }
2049
2050         /**
2051          * Use PHP's magic __get handler to handle accessing of
2052          * raw WikiPage fields for backwards compatibility.
2053          *
2054          * @param string $fname Field name
2055          * @return mixed
2056          */
2057         public function __get( $fname ) {
2058                 if ( property_exists( $this->mPage, $fname ) ) {
2059                         # wfWarn( "Access to raw $fname field " . __CLASS__ );
2060                         return $this->mPage->$fname;
2061                 }
2062                 trigger_error( 'Inaccessible property via __get(): ' . $fname, E_USER_NOTICE );
2063         }
2064
2065         /**
2066          * Use PHP's magic __set handler to handle setting of
2067          * raw WikiPage fields for backwards compatibility.
2068          *
2069          * @param string $fname Field name
2070          * @param mixed $fvalue New value
2071          */
2072         public function __set( $fname, $fvalue ) {
2073                 if ( property_exists( $this->mPage, $fname ) ) {
2074                         # wfWarn( "Access to raw $fname field of " . __CLASS__ );
2075                         $this->mPage->$fname = $fvalue;
2076                 // Note: extensions may want to toss on new fields
2077                 } elseif ( !in_array( $fname, [ 'mContext', 'mPage' ] ) ) {
2078                         $this->mPage->$fname = $fvalue;
2079                 } else {
2080                         trigger_error( 'Inaccessible property via __set(): ' . $fname, E_USER_NOTICE );
2081                 }
2082         }
2083
2084         /**
2085          * Call to WikiPage function for backwards compatibility.
2086          * @see WikiPage::checkFlags
2087          */
2088         public function checkFlags( $flags ) {
2089                 return $this->mPage->checkFlags( $flags );
2090         }
2091
2092         /**
2093          * Call to WikiPage function for backwards compatibility.
2094          * @see WikiPage::checkTouched
2095          */
2096         public function checkTouched() {
2097                 return $this->mPage->checkTouched();
2098         }
2099
2100         /**
2101          * Call to WikiPage function for backwards compatibility.
2102          * @see WikiPage::clearPreparedEdit
2103          */
2104         public function clearPreparedEdit() {
2105                 $this->mPage->clearPreparedEdit();
2106         }
2107
2108         /**
2109          * Call to WikiPage function for backwards compatibility.
2110          * @see WikiPage::doDeleteArticleReal
2111          */
2112         public function doDeleteArticleReal(
2113                 $reason, $suppress = false, $u1 = null, $u2 = null, &$error = '', User $user = null
2114         ) {
2115                 return $this->mPage->doDeleteArticleReal(
2116                         $reason, $suppress, $u1, $u2, $error, $user
2117                 );
2118         }
2119
2120         /**
2121          * Call to WikiPage function for backwards compatibility.
2122          * @see WikiPage::doDeleteUpdates
2123          */
2124         public function doDeleteUpdates( $id, Content $content = null ) {
2125                 return $this->mPage->doDeleteUpdates( $id, $content );
2126         }
2127
2128         /**
2129          * Call to WikiPage function for backwards compatibility.
2130          * @see WikiPage::doEdit
2131          */
2132         public function doEdit( $text, $summary, $flags = 0, $baseRevId = false, $user = null ) {
2133                 ContentHandler::deprecated( __METHOD__, '1.21' );
2134                 return $this->mPage->doEdit( $text, $summary, $flags, $baseRevId, $user );
2135         }
2136
2137         /**
2138          * Call to WikiPage function for backwards compatibility.
2139          * @see WikiPage::doEditContent
2140          */
2141         public function doEditContent( Content $content, $summary, $flags = 0, $baseRevId = false,
2142                 User $user = null, $serialFormat = null
2143         ) {
2144                 return $this->mPage->doEditContent( $content, $summary, $flags, $baseRevId,
2145                         $user, $serialFormat
2146                 );
2147         }
2148
2149         /**
2150          * Call to WikiPage function for backwards compatibility.
2151          * @see WikiPage::doEditUpdates
2152          */
2153         public function doEditUpdates( Revision $revision, User $user, array $options = [] ) {
2154                 return $this->mPage->doEditUpdates( $revision, $user, $options );
2155         }
2156
2157         /**
2158          * Call to WikiPage function for backwards compatibility.
2159          * @see WikiPage::doPurge
2160          */
2161         public function doPurge() {
2162                 return $this->mPage->doPurge();
2163         }
2164
2165         /**
2166          * Call to WikiPage function for backwards compatibility.
2167          * @see WikiPage::doQuickEditContent
2168          */
2169         public function doQuickEditContent(
2170                 Content $content, User $user, $comment = '', $minor = false, $serialFormat = null
2171         ) {
2172                 return $this->mPage->doQuickEditContent(
2173                         $content, $user, $comment, $minor, $serialFormat
2174                 );
2175         }
2176
2177         /**
2178          * Call to WikiPage function for backwards compatibility.
2179          * @see WikiPage::doViewUpdates
2180          */
2181         public function doViewUpdates( User $user, $oldid = 0 ) {
2182                 $this->mPage->doViewUpdates( $user, $oldid );
2183         }
2184
2185         /**
2186          * Call to WikiPage function for backwards compatibility.
2187          * @see WikiPage::exists
2188          */
2189         public function exists() {
2190                 return $this->mPage->exists();
2191         }
2192
2193         /**
2194          * Call to WikiPage function for backwards compatibility.
2195          * @see WikiPage::followRedirect
2196          */
2197         public function followRedirect() {
2198                 return $this->mPage->followRedirect();
2199         }
2200
2201         /**
2202          * Call to WikiPage function for backwards compatibility.
2203          * @see ContentHandler::getActionOverrides
2204          */
2205         public function getActionOverrides() {
2206                 return $this->mPage->getActionOverrides();
2207         }
2208
2209         /**
2210          * Call to WikiPage function for backwards compatibility.
2211          * @see WikiPage::getAutoDeleteReason
2212          */
2213         public function getAutoDeleteReason( &$hasHistory ) {
2214                 return $this->mPage->getAutoDeleteReason( $hasHistory );
2215         }
2216
2217         /**
2218          * Call to WikiPage function for backwards compatibility.
2219          * @see WikiPage::getCategories
2220          */
2221         public function getCategories() {
2222                 return $this->mPage->getCategories();
2223         }
2224
2225         /**
2226          * Call to WikiPage function for backwards compatibility.
2227          * @see WikiPage::getComment
2228          */
2229         public function getComment( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2230                 return $this->mPage->getComment( $audience, $user );
2231         }
2232
2233         /**
2234          * Call to WikiPage function for backwards compatibility.
2235          * @see WikiPage::getContentHandler
2236          */
2237         public function getContentHandler() {
2238                 return $this->mPage->getContentHandler();
2239         }
2240
2241         /**
2242          * Call to WikiPage function for backwards compatibility.
2243          * @see WikiPage::getContentModel
2244          */
2245         public function getContentModel() {
2246                 return $this->mPage->getContentModel();
2247         }
2248
2249         /**
2250          * Call to WikiPage function for backwards compatibility.
2251          * @see WikiPage::getContributors
2252          */
2253         public function getContributors() {
2254                 return $this->mPage->getContributors();
2255         }
2256
2257         /**
2258          * Call to WikiPage function for backwards compatibility.
2259          * @see WikiPage::getCreator
2260          */
2261         public function getCreator( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2262                 return $this->mPage->getCreator( $audience, $user );
2263         }
2264
2265         /**
2266          * Call to WikiPage function for backwards compatibility.
2267          * @see WikiPage::getDeletionUpdates
2268          */
2269         public function getDeletionUpdates( Content $content = null ) {
2270                 return $this->mPage->getDeletionUpdates( $content );
2271         }
2272
2273         /**
2274          * Call to WikiPage function for backwards compatibility.
2275          * @see WikiPage::getHiddenCategories
2276          */
2277         public function getHiddenCategories() {
2278                 return $this->mPage->getHiddenCategories();
2279         }
2280
2281         /**
2282          * Call to WikiPage function for backwards compatibility.
2283          * @see WikiPage::getId
2284          */
2285         public function getId() {
2286                 return $this->mPage->getId();
2287         }
2288
2289         /**
2290          * Call to WikiPage function for backwards compatibility.
2291          * @see WikiPage::getLatest
2292          */
2293         public function getLatest() {
2294                 return $this->mPage->getLatest();
2295         }
2296
2297         /**
2298          * Call to WikiPage function for backwards compatibility.
2299          * @see WikiPage::getLinksTimestamp
2300          */
2301         public function getLinksTimestamp() {
2302                 return $this->mPage->getLinksTimestamp();
2303         }
2304
2305         /**
2306          * Call to WikiPage function for backwards compatibility.
2307          * @see WikiPage::getMinorEdit
2308          */
2309         public function getMinorEdit() {
2310                 return $this->mPage->getMinorEdit();
2311         }
2312
2313         /**
2314          * Call to WikiPage function for backwards compatibility.
2315          * @see WikiPage::getOldestRevision
2316          */
2317         public function getOldestRevision() {
2318                 return $this->mPage->getOldestRevision();
2319         }
2320
2321         /**
2322          * Call to WikiPage function for backwards compatibility.
2323          * @see WikiPage::getRedirectTarget
2324          */
2325         public function getRedirectTarget() {
2326                 return $this->mPage->getRedirectTarget();
2327         }
2328
2329         /**
2330          * Call to WikiPage function for backwards compatibility.
2331          * @see WikiPage::getRedirectURL
2332          */
2333         public function getRedirectURL( $rt ) {
2334                 return $this->mPage->getRedirectURL( $rt );
2335         }
2336
2337         /**
2338          * Call to WikiPage function for backwards compatibility.
2339          * @see WikiPage::getRevision
2340          */
2341         public function getRevision() {
2342                 return $this->mPage->getRevision();
2343         }
2344
2345         /**
2346          * Call to WikiPage function for backwards compatibility.
2347          * @see WikiPage::getText
2348          */
2349         public function getText( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2350                 ContentHandler::deprecated( __METHOD__, '1.21' );
2351                 return $this->mPage->getText( $audience, $user );
2352         }
2353
2354         /**
2355          * Call to WikiPage function for backwards compatibility.
2356          * @see WikiPage::getTimestamp
2357          */
2358         public function getTimestamp() {
2359                 return $this->mPage->getTimestamp();
2360         }
2361
2362         /**
2363          * Call to WikiPage function for backwards compatibility.
2364          * @see WikiPage::getTouched
2365          */
2366         public function getTouched() {
2367                 return $this->mPage->getTouched();
2368         }
2369
2370         /**
2371          * Call to WikiPage function for backwards compatibility.
2372          * @see WikiPage::getUndoContent
2373          */
2374         public function getUndoContent( Revision $undo, Revision $undoafter = null ) {
2375                 return $this->mPage->getUndoContent( $undo, $undoafter );
2376         }
2377
2378         /**
2379          * Call to WikiPage function for backwards compatibility.
2380          * @see WikiPage::getUser
2381          */
2382         public function getUser( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2383                 return $this->mPage->getUser( $audience, $user );
2384         }
2385
2386         /**
2387          * Call to WikiPage function for backwards compatibility.
2388          * @see WikiPage::getUserText
2389          */
2390         public function getUserText( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2391                 return $this->mPage->getUserText( $audience, $user );
2392         }
2393
2394         /**
2395          * Call to WikiPage function for backwards compatibility.
2396          * @see WikiPage::hasViewableContent
2397          */
2398         public function hasViewableContent() {
2399                 return $this->mPage->hasViewableContent();
2400         }
2401
2402         /**
2403          * Call to WikiPage function for backwards compatibility.
2404          * @see WikiPage::insertOn
2405          */
2406         public function insertOn( $dbw, $pageId = null ) {
2407                 return $this->mPage->insertOn( $dbw, $pageId );
2408         }
2409
2410         /**
2411          * Call to WikiPage function for backwards compatibility.
2412          * @see WikiPage::insertProtectNullRevision
2413          */
2414         public function insertProtectNullRevision( $revCommentMsg, array $limit,
2415                 array $expiry, $cascade, $reason, $user = null
2416         ) {
2417                 return $this->mPage->insertProtectNullRevision( $revCommentMsg, $limit,
2418                         $expiry, $cascade, $reason, $user
2419                 );
2420         }
2421
2422         /**
2423          * Call to WikiPage function for backwards compatibility.
2424          * @see WikiPage::insertRedirect
2425          */
2426         public function insertRedirect() {
2427                 return $this->mPage->insertRedirect();
2428         }
2429
2430         /**
2431          * Call to WikiPage function for backwards compatibility.
2432          * @see WikiPage::insertRedirectEntry
2433          */
2434         public function insertRedirectEntry( Title $rt, $oldLatest = null ) {
2435                 return $this->mPage->insertRedirectEntry( $rt, $oldLatest );
2436         }
2437
2438         /**
2439          * Call to WikiPage function for backwards compatibility.
2440          * @see WikiPage::isCountable
2441          */
2442         public function isCountable( $editInfo = false ) {
2443                 return $this->mPage->isCountable( $editInfo );
2444         }
2445
2446         /**
2447          * Call to WikiPage function for backwards compatibility.
2448          * @see WikiPage::isRedirect
2449          */
2450         public function isRedirect() {
2451                 return $this->mPage->isRedirect();
2452         }
2453
2454         /**
2455          * Call to WikiPage function for backwards compatibility.
2456          * @see WikiPage::loadFromRow
2457          */
2458         public function loadFromRow( $data, $from ) {
2459                 return $this->mPage->loadFromRow( $data, $from );
2460         }
2461
2462         /**
2463          * Call to WikiPage function for backwards compatibility.
2464          * @see WikiPage::loadPageData
2465          */
2466         public function loadPageData( $from = 'fromdb' ) {
2467                 $this->mPage->loadPageData( $from );
2468         }
2469
2470         /**
2471          * Call to WikiPage function for backwards compatibility.
2472          * @see WikiPage::lockAndGetLatest
2473          */
2474         public function lockAndGetLatest() {
2475                 return $this->mPage->lockAndGetLatest();
2476         }
2477
2478         /**
2479          * Call to WikiPage function for backwards compatibility.
2480          * @see WikiPage::makeParserOptions
2481          */
2482         public function makeParserOptions( $context ) {
2483                 return $this->mPage->makeParserOptions( $context );
2484         }
2485
2486         /**
2487          * Call to WikiPage function for backwards compatibility.
2488          * @see WikiPage::pageDataFromId
2489          */
2490         public function pageDataFromId( $dbr, $id, $options = [] ) {
2491                 return $this->mPage->pageDataFromId( $dbr, $id, $options );
2492         }
2493
2494         /**
2495          * Call to WikiPage function for backwards compatibility.
2496          * @see WikiPage::pageDataFromTitle
2497          */
2498         public function pageDataFromTitle( $dbr, $title, $options = [] ) {
2499                 return $this->mPage->pageDataFromTitle( $dbr, $title, $options );
2500         }
2501
2502         /**
2503          * Call to WikiPage function for backwards compatibility.
2504          * @see WikiPage::prepareContentForEdit
2505          */
2506         public function prepareContentForEdit(
2507                 Content $content, $revision = null, User $user = null,
2508                 $serialFormat = null, $useCache = true
2509         ) {
2510                 return $this->mPage->prepareContentForEdit(
2511                         $content, $revision, $user,
2512                         $serialFormat, $useCache
2513                 );
2514         }
2515
2516         /**
2517          * Call to WikiPage function for backwards compatibility.
2518          * @see WikiPage::prepareTextForEdit
2519          */
2520         public function prepareTextForEdit( $text, $revid = null, User $user = null ) {
2521                 return $this->mPage->prepareTextForEdit( $text, $revid, $user );
2522         }
2523
2524         /**
2525          * Call to WikiPage function for backwards compatibility.
2526          * @see WikiPage::protectDescription
2527          */
2528         public function protectDescription( array $limit, array $expiry ) {
2529                 return $this->mPage->protectDescription( $limit, $expiry );
2530         }
2531
2532         /**
2533          * Call to WikiPage function for backwards compatibility.
2534          * @see WikiPage::protectDescriptionLog
2535          */
2536         public function protectDescriptionLog( array $limit, array $expiry ) {
2537                 return $this->mPage->protectDescriptionLog( $limit, $expiry );
2538         }
2539
2540         /**
2541          * Call to WikiPage function for backwards compatibility.
2542          * @see WikiPage::replaceSectionAtRev
2543          */
2544         public function replaceSectionAtRev( $sectionId, Content $sectionContent,
2545                 $sectionTitle = '', $baseRevId = null
2546         ) {
2547                 return $this->mPage->replaceSectionAtRev( $sectionId, $sectionContent,
2548                         $sectionTitle, $baseRevId
2549                 );
2550         }
2551
2552         /**
2553          * Call to WikiPage function for backwards compatibility.
2554          * @see WikiPage::replaceSectionContent
2555          */
2556         public function replaceSectionContent(
2557                 $sectionId, Content $sectionContent, $sectionTitle = '', $edittime = null
2558         ) {
2559                 return $this->mPage->replaceSectionContent(
2560                         $sectionId, $sectionContent, $sectionTitle, $edittime
2561                 );
2562         }
2563
2564         /**
2565          * Call to WikiPage function for backwards compatibility.
2566          * @see WikiPage::setTimestamp
2567          */
2568         public function setTimestamp( $ts ) {
2569                 return $this->mPage->setTimestamp( $ts );
2570         }
2571
2572         /**
2573          * Call to WikiPage function for backwards compatibility.
2574          * @see WikiPage::shouldCheckParserCache
2575          */
2576         public function shouldCheckParserCache( ParserOptions $parserOptions, $oldId ) {
2577                 return $this->mPage->shouldCheckParserCache( $parserOptions, $oldId );
2578         }
2579
2580         /**
2581          * Call to WikiPage function for backwards compatibility.
2582          * @see WikiPage::supportsSections
2583          */
2584         public function supportsSections() {
2585                 return $this->mPage->supportsSections();
2586         }
2587
2588         /**
2589          * Call to WikiPage function for backwards compatibility.
2590          * @see WikiPage::triggerOpportunisticLinksUpdate
2591          */
2592         public function triggerOpportunisticLinksUpdate( ParserOutput $parserOutput ) {
2593                 return $this->mPage->triggerOpportunisticLinksUpdate( $parserOutput );
2594         }
2595
2596         /**
2597          * Call to WikiPage function for backwards compatibility.
2598          * @see WikiPage::updateCategoryCounts
2599          */
2600         public function updateCategoryCounts( array $added, array $deleted, $id = 0 ) {
2601                 return $this->mPage->updateCategoryCounts( $added, $deleted, $id );
2602         }
2603
2604         /**
2605          * Call to WikiPage function for backwards compatibility.
2606          * @see WikiPage::updateIfNewerOn
2607          */
2608         public function updateIfNewerOn( $dbw, $revision ) {
2609                 return $this->mPage->updateIfNewerOn( $dbw, $revision );
2610         }
2611
2612         /**
2613          * Call to WikiPage function for backwards compatibility.
2614          * @see WikiPage::updateRedirectOn
2615          */
2616         public function updateRedirectOn( $dbw, $redirectTitle, $lastRevIsRedirect = null ) {
2617                 return $this->mPage->updateRedirectOn( $dbw, $redirectTitle, $lastRevIsRedirect = null );
2618         }
2619
2620         /**
2621          * Call to WikiPage function for backwards compatibility.
2622          * @see WikiPage::updateRevisionOn
2623          */
2624         public function updateRevisionOn( $dbw, $revision, $lastRevision = null,
2625                 $lastRevIsRedirect = null
2626         ) {
2627                 return $this->mPage->updateRevisionOn( $dbw, $revision, $lastRevision,
2628                         $lastRevIsRedirect
2629                 );
2630         }
2631
2632         /**
2633          * @param array $limit
2634          * @param array $expiry
2635          * @param bool $cascade
2636          * @param string $reason
2637          * @param User $user
2638          * @return Status
2639          */
2640         public function doUpdateRestrictions( array $limit, array $expiry, &$cascade,
2641                 $reason, User $user
2642         ) {
2643                 return $this->mPage->doUpdateRestrictions( $limit, $expiry, $cascade, $reason, $user );
2644         }
2645
2646         /**
2647          * @param array $limit
2648          * @param string $reason
2649          * @param int $cascade
2650          * @param array $expiry
2651          * @return bool
2652          */
2653         public function updateRestrictions( $limit = [], $reason = '',
2654                 &$cascade = 0, $expiry = []
2655         ) {
2656                 return $this->mPage->doUpdateRestrictions(
2657                         $limit,
2658                         $expiry,
2659                         $cascade,
2660                         $reason,
2661                         $this->getContext()->getUser()
2662                 );
2663         }
2664
2665         /**
2666          * @param string $reason
2667          * @param bool $suppress
2668          * @param int $u1 Unused
2669          * @param bool $u2 Unused
2670          * @param string $error
2671          * @return bool
2672          */
2673         public function doDeleteArticle(
2674                 $reason, $suppress = false, $u1 = null, $u2 = null, &$error = ''
2675         ) {
2676                 return $this->mPage->doDeleteArticle( $reason, $suppress, $u1, $u2, $error );
2677         }
2678
2679         /**
2680          * @param string $fromP
2681          * @param string $summary
2682          * @param string $token
2683          * @param bool $bot
2684          * @param array $resultDetails
2685          * @param User|null $user
2686          * @return array
2687          */
2688         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails, User $user = null ) {
2689                 $user = is_null( $user ) ? $this->getContext()->getUser() : $user;
2690                 return $this->mPage->doRollback( $fromP, $summary, $token, $bot, $resultDetails, $user );
2691         }
2692
2693         /**
2694          * @param string $fromP
2695          * @param string $summary
2696          * @param bool $bot
2697          * @param array $resultDetails
2698          * @param User|null $guser
2699          * @return array
2700          */
2701         public function commitRollback( $fromP, $summary, $bot, &$resultDetails, User $guser = null ) {
2702                 $guser = is_null( $guser ) ? $this->getContext()->getUser() : $guser;
2703                 return $this->mPage->commitRollback( $fromP, $summary, $bot, $resultDetails, $guser );
2704         }
2705
2706         /**
2707          * @param bool $hasHistory
2708          * @return mixed
2709          */
2710         public function generateReason( &$hasHistory ) {
2711                 $title = $this->mPage->getTitle();
2712                 $handler = ContentHandler::getForTitle( $title );
2713                 return $handler->getAutoDeleteReason( $title, $hasHistory );
2714         }
2715
2716         /**
2717          * @return array
2718          *
2719          * @deprecated since 1.24, use WikiPage::selectFields() instead
2720          */
2721         public static function selectFields() {
2722                 wfDeprecated( __METHOD__, '1.24' );
2723                 return WikiPage::selectFields();
2724         }
2725
2726         /**
2727          * @param Title $title
2728          *
2729          * @deprecated since 1.24, use WikiPage::onArticleCreate() instead
2730          */
2731         public static function onArticleCreate( $title ) {
2732                 wfDeprecated( __METHOD__, '1.24' );
2733                 WikiPage::onArticleCreate( $title );
2734         }
2735
2736         /**
2737          * @param Title $title
2738          *
2739          * @deprecated since 1.24, use WikiPage::onArticleDelete() instead
2740          */
2741         public static function onArticleDelete( $title ) {
2742                 wfDeprecated( __METHOD__, '1.24' );
2743                 WikiPage::onArticleDelete( $title );
2744         }
2745
2746         /**
2747          * @param Title $title
2748          *
2749          * @deprecated since 1.24, use WikiPage::onArticleEdit() instead
2750          */
2751         public static function onArticleEdit( $title ) {
2752                 wfDeprecated( __METHOD__, '1.24' );
2753                 WikiPage::onArticleEdit( $title );
2754         }
2755
2756         /**
2757          * @param string $oldtext
2758          * @param string $newtext
2759          * @param int $flags
2760          * @return string
2761          * @deprecated since 1.21, use ContentHandler::getAutosummary() instead
2762          */
2763         public static function getAutosummary( $oldtext, $newtext, $flags ) {
2764                 return WikiPage::getAutosummary( $oldtext, $newtext, $flags );
2765         }
2766         // ******
2767 }