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                 # Use adaptive TTLs for CDN so delayed/failed purges are noticed less often.
 721                 # This could use getTouched(), but that could be scary for major template edits.
 722                 $outputPage->adaptCdnTTL( $this->mPage->getTimestamp(), IExpiringStore::TTL_DAY );
 723
 724                 # Check for any __NOINDEX__ tags on the page using $pOutput
 725                 $policy = $this->getRobotPolicy( 'view', $pOutput );
 726                 $outputPage->setIndexPolicy( $policy['index'] );
 727                 $outputPage->setFollowPolicy( $policy['follow'] );
 728
 729                 $this->showViewFooter();
 730                 $this->mPage->doViewUpdates( $user, $oldid );
 731
 732                 $outputPage->addModules( 'mediawiki.action.view.postEdit' );
 733         }
 734
 735         /**
 736          * Adjust title for pages with displaytitle, -{T|}- or language conversion
 737          * @param ParserOutput $pOutput
 738          */
 739         public function adjustDisplayTitle( ParserOutput $pOutput ) {
 740                 # Adjust the title if it was set by displaytitle, -{T|}- or language conversion
 741                 $titleText = $pOutput->getTitleText();
 742                 if ( strval( $titleText ) !== '' ) {
 743                         $this->getContext()->getOutput()->setPageTitle( $titleText );
 744                 }
 745         }
 746
 747         /**
 748          * Show a diff page according to current request variables. For use within
 749          * Article::view() only, other callers should use the DifferenceEngine class.
 750          *
 751          */
 752         protected function showDiffPage() {
 753                 $request = $this->getContext()->getRequest();
 754                 $user = $this->getContext()->getUser();
 755                 $diff = $request->getVal( 'diff' );
 756                 $rcid = $request->getVal( 'rcid' );
 757                 $diffOnly = $request->getBool( 'diffonly', $user->getOption( 'diffonly' ) );
 758                 $purge = $request->getVal( 'action' ) == 'purge';
 759                 $unhide = $request->getInt( 'unhide' ) == 1;
 760                 $oldid = $this->getOldID();
 761
 762                 $rev = $this->getRevisionFetched();
 763
 764                 if ( !$rev ) {
 765                         $this->getContext()->getOutput()->setPageTitle( wfMessage( 'errorpagetitle' ) );
 766                         $msg = $this->getContext()->msg( 'difference-missing-revision' )
 767                                 ->params( $oldid )
 768                                 ->numParams( 1 )
 769                                 ->parseAsBlock();
 770                         $this->getContext()->getOutput()->addHTML( $msg );
 771                         return;
 772                 }
 773
 774                 $contentHandler = $rev->getContentHandler();
 775                 $de = $contentHandler->createDifferenceEngine(
 776                         $this->getContext(),
 777                         $oldid,
 778                         $diff,
 779                         $rcid,
 780                         $purge,
 781                         $unhide
 782                 );
 783
 784                 // DifferenceEngine directly fetched the revision:
 785                 $this->mRevIdFetched = $de->mNewid;
 786                 $de->showDiffPage( $diffOnly );
 787
 788                 // Run view updates for the newer revision being diffed (and shown
 789                 // below the diff if not $diffOnly).
 790                 list( $old, $new ) = $de->mapDiffPrevNext( $oldid, $diff );
 791                 // New can be false, convert it to 0 - this conveniently means the latest revision
 792                 $this->mPage->doViewUpdates( $user, (int)$new );
 793         }
 794
 795         /**
 796          * Show a page view for a page formatted as CSS or JavaScript. To be called by
 797          * Article::view() only.
 798          *
 799          * This exists mostly to serve the deprecated ShowRawCssJs hook (used to customize these views).
 800          * It has been replaced by the ContentGetParserOutput hook, which lets you do the same but with
 801          * more flexibility.
 802          *
 803          * @param bool $showCacheHint Whether to show a message telling the user
 804          *   to clear the browser cache (default: true).
 805          */
 806         protected function showCssOrJsPage( $showCacheHint = true ) {
 807                 $outputPage = $this->getContext()->getOutput();
 808
 809                 if ( $showCacheHint ) {
 810                         $dir = $this->getContext()->getLanguage()->getDir();
 811                         $lang = $this->getContext()->getLanguage()->getHtmlCode();
 812
 813                         $outputPage->wrapWikiMsg(
 814                                 "<div id='mw-clearyourcache' lang='$lang' dir='$dir' class='mw-content-$dir'>\n$1\n</div>",
 815                                 'clearyourcache'
 816                         );
 817                 }
 818
 819                 $this->fetchContentObject();
 820
 821                 if ( $this->mContentObject ) {
 822                         // Give hooks a chance to customise the output
 823                         if ( ContentHandler::runLegacyHooks(
 824                                 'ShowRawCssJs',
 825                                 [ $this->mContentObject, $this->getTitle(), $outputPage ] )
 826                         ) {
 827                                 // If no legacy hooks ran, display the content of the parser output, including RL modules,
 828                                 // but excluding metadata like categories and language links
 829                                 $po = $this->mContentObject->getParserOutput( $this->getTitle() );
 830                                 $outputPage->addParserOutputContent( $po );
 831                         }
 832                 }
 833         }
 834
 835         /**
 836          * Get the robot policy to be used for the current view
 837          * @param string $action The action= GET parameter
 838          * @param ParserOutput|null $pOutput
 839          * @return array The policy that should be set
 840          * @todo actions other than 'view'
 841          */
 842         public function getRobotPolicy( $action, $pOutput = null ) {
 843                 global $wgArticleRobotPolicies, $wgNamespaceRobotPolicies, $wgDefaultRobotPolicy;
 844
 845                 $ns = $this->getTitle()->getNamespace();
 846
 847                 # Don't index user and user talk pages for blocked users (bug 11443)
 848                 if ( ( $ns == NS_USER || $ns == NS_USER_TALK ) && !$this->getTitle()->isSubpage() ) {
 849                         $specificTarget = null;
 850                         $vagueTarget = null;
 851                         $titleText = $this->getTitle()->getText();
 852                         if ( IP::isValid( $titleText ) ) {
 853                                 $vagueTarget = $titleText;
 854                         } else {
 855                                 $specificTarget = $titleText;
 856                         }
 857                         if ( Block::newFromTarget( $specificTarget, $vagueTarget ) instanceof Block ) {
 858                                 return [
 859                                         'index' => 'noindex',
 860                                         'follow' => 'nofollow'
 861                                 ];
 862                         }
 863                 }
 864
 865                 if ( $this->mPage->getId() === 0 || $this->getOldID() ) {
 866                         # Non-articles (special pages etc), and old revisions
 867                         return [
 868                                 'index' => 'noindex',
 869                                 'follow' => 'nofollow'
 870                         ];
 871                 } elseif ( $this->getContext()->getOutput()->isPrintable() ) {
 872                         # Discourage indexing of printable versions, but encourage following
 873                         return [
 874                                 'index' => 'noindex',
 875                                 'follow' => 'follow'
 876                         ];
 877                 } elseif ( $this->getContext()->getRequest()->getInt( 'curid' ) ) {
 878                         # For ?curid=x urls, disallow indexing
 879                         return [
 880                                 'index' => 'noindex',
 881                                 'follow' => 'follow'
 882                         ];
 883                 }
 884
 885                 # Otherwise, construct the policy based on the various config variables.
 886                 $policy = self::formatRobotPolicy( $wgDefaultRobotPolicy );
 887
 888                 if ( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 889                         # Honour customised robot policies for this namespace
 890                         $policy = array_merge(
 891                                 $policy,
 892                                 self::formatRobotPolicy( $wgNamespaceRobotPolicies[$ns] )
 893                         );
 894                 }
 895                 if ( $this->getTitle()->canUseNoindex() && is_object( $pOutput ) && $pOutput->getIndexPolicy() ) {
 896                         # __INDEX__ and __NOINDEX__ magic words, if allowed. Incorporates
 897                         # a final sanity check that we have really got the parser output.
 898                         $policy = array_merge(
 899                                 $policy,
 900                                 [ 'index' => $pOutput->getIndexPolicy() ]
 901                         );
 902                 }
 903
 904                 if ( isset( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] ) ) {
 905                         # (bug 14900) site config can override user-defined __INDEX__ or __NOINDEX__
 906                         $policy = array_merge(
 907                                 $policy,
 908                                 self::formatRobotPolicy( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] )
 909                         );
 910                 }
 911
 912                 return $policy;
 913         }
 914
 915         /**
 916          * Converts a String robot policy into an associative array, to allow
 917          * merging of several policies using array_merge().
 918          * @param array|string $policy Returns empty array on null/false/'', transparent
 919          *   to already-converted arrays, converts string.
 920          * @return array 'index' => \<indexpolicy\>, 'follow' => \<followpolicy\>
 921          */
 922         public static function formatRobotPolicy( $policy ) {
 923                 if ( is_array( $policy ) ) {
 924                         return $policy;
 925                 } elseif ( !$policy ) {
 926                         return [];
 927                 }
 928
 929                 $policy = explode( ',', $policy );
 930                 $policy = array_map( 'trim', $policy );
 931
 932                 $arr = [];
 933                 foreach ( $policy as $var ) {
 934                         if ( in_array( $var, [ 'index', 'noindex' ] ) ) {
 935                                 $arr['index'] = $var;
 936                         } elseif ( in_array( $var, [ 'follow', 'nofollow' ] ) ) {
 937                                 $arr['follow'] = $var;
 938                         }
 939                 }
 940
 941                 return $arr;
 942         }
 943
 944         /**
 945          * If this request is a redirect view, send "redirected from" subtitle to
 946          * the output. Returns true if the header was needed, false if this is not
 947          * a redirect view. Handles both local and remote redirects.
 948          *
 949          * @return bool
 950          */
 951         public function showRedirectedFromHeader() {
 952                 global $wgRedirectSources;
 953
 954                 $context = $this->getContext();
 955                 $outputPage = $context->getOutput();
 956                 $request = $context->getRequest();
 957                 $rdfrom = $request->getVal( 'rdfrom' );
 958
 959                 // Construct a URL for the current page view, but with the target title
 960                 $query = $request->getValues();
 961                 unset( $query['rdfrom'] );
 962                 unset( $query['title'] );
 963                 if ( $this->getTitle()->isRedirect() ) {
 964                         // Prevent double redirects
 965                         $query['redirect'] = 'no';
 966                 }
 967                 $redirectTargetUrl = $this->getTitle()->getLinkURL( $query );
 968
 969                 if ( isset( $this->mRedirectedFrom ) ) {
 970                         // This is an internally redirected page view.
 971                         // We'll need a backlink to the source page for navigation.
 972                         if ( Hooks::run( 'ArticleViewRedirect', [ &$this ] ) ) {
 973                                 $redir = Linker::linkKnown(
 974                                         $this->mRedirectedFrom,
 975                                         null,
 976                                         [],
 977                                         [ 'redirect' => 'no' ]
 978                                 );
 979
 980                                 $outputPage->addSubtitle( "<span class=\"mw-redirectedfrom\">" .
 981                                         $context->msg( 'redirectedfrom' )->rawParams( $redir )->parse()
 982                                 . "</span>" );
 983
 984                                 // Add the script to update the displayed URL and
 985                                 // set the fragment if one was specified in the redirect
 986                                 $outputPage->addJsConfigVars( [
 987                                         'wgInternalRedirectTargetUrl' => $redirectTargetUrl,
 988                                 ] );
 989                                 $outputPage->addModules( 'mediawiki.action.view.redirect' );
 990
 991                                 // Add a <link rel="canonical"> tag
 992                                 $outputPage->setCanonicalUrl( $this->getTitle()->getCanonicalURL() );
 993
 994                                 // Tell the output object that the user arrived at this article through a redirect
 995                                 $outputPage->setRedirectedFrom( $this->mRedirectedFrom );
 996
 997                                 return true;
 998                         }
 999                 } elseif ( $rdfrom ) {
1000                         // This is an externally redirected view, from some other wiki.
1001                         // If it was reported from a trusted site, supply a backlink.
1002                         if ( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
1003                                 $redir = Linker::makeExternalLink( $rdfrom, $rdfrom );
1004                                 $outputPage->addSubtitle( "<span class=\"mw-redirectedfrom\">" .
1005                                         $context->msg( 'redirectedfrom' )->rawParams( $redir )->parse()
1006                                 . "</span>" );
1007
1008                                 // Add the script to update the displayed URL
1009                                 $outputPage->addJsConfigVars( [
1010                                         'wgInternalRedirectTargetUrl' => $redirectTargetUrl,
1011                                 ] );
1012                                 $outputPage->addModules( 'mediawiki.action.view.redirect' );
1013
1014                                 return true;
1015                         }
1016                 }
1017
1018                 return false;
1019         }
1020
1021         /**
1022          * Show a header specific to the namespace currently being viewed, like
1023          * [[MediaWiki:Talkpagetext]]. For Article::view().
1024          */
1025         public function showNamespaceHeader() {
1026                 if ( $this->getTitle()->isTalkPage() ) {
1027                         if ( !wfMessage( 'talkpageheader' )->isDisabled() ) {
1028                                 $this->getContext()->getOutput()->wrapWikiMsg(
1029                                         "<div class=\"mw-talkpageheader\">\n$1\n</div>",
1030                                         [ 'talkpageheader' ]
1031                                 );
1032                         }
1033                 }
1034         }
1035
1036         /**
1037          * Show the footer section of an ordinary page view
1038          */
1039         public function showViewFooter() {
1040                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
1041                 if ( $this->getTitle()->getNamespace() == NS_USER_TALK
1042                         && IP::isValid( $this->getTitle()->getText() )
1043                 ) {
1044                         $this->getContext()->getOutput()->addWikiMsg( 'anontalkpagetext' );
1045                 }
1046
1047                 // Show a footer allowing the user to patrol the shown revision or page if possible
1048                 $patrolFooterShown = $this->showPatrolFooter();
1049
1050                 Hooks::run( 'ArticleViewFooter', [ $this, $patrolFooterShown ] );
1051         }
1052
1053         /**
1054          * If patrol is possible, output a patrol UI box. This is called from the
1055          * footer section of ordinary page views. If patrol is not possible or not
1056          * desired, does nothing.
1057          * Side effect: When the patrol link is build, this method will call
1058          * OutputPage::preventClickjacking() and load mediawiki.page.patrol.ajax.
1059          *
1060          * @return bool
1061          */
1062         public function showPatrolFooter() {
1063                 global $wgUseNPPatrol, $wgUseRCPatrol, $wgUseFilePatrol, $wgEnableAPI, $wgEnableWriteAPI;
1064
1065                 $outputPage = $this->getContext()->getOutput();
1066                 $user = $this->getContext()->getUser();
1067                 $title = $this->getTitle();
1068                 $rc = false;
1069
1070                 if ( !$title->quickUserCan( 'patrol', $user )
1071                         || !( $wgUseRCPatrol || $wgUseNPPatrol
1072                                 || ( $wgUseFilePatrol && $title->inNamespace( NS_FILE ) ) )
1073                 ) {
1074                         // Patrolling is disabled or the user isn't allowed to
1075                         return false;
1076                 }
1077
1078                 if ( $this->mRevision
1079                         && !RecentChange::isInRCLifespan( $this->mRevision->getTimestamp(), 21600 )
1080                 ) {
1081                         // The current revision is already older than what could be in the RC table
1082                         // 6h tolerance because the RC might not be cleaned out regularly
1083                         return false;
1084                 }
1085
1086                 // Check for cached results
1087                 $key = wfMemcKey( 'unpatrollable-page', $title->getArticleID() );
1088                 $cache = ObjectCache::getMainWANInstance();
1089                 if ( $cache->get( $key ) ) {
1090                         return false;
1091                 }
1092
1093                 $dbr = wfGetDB( DB_SLAVE );
1094                 $oldestRevisionTimestamp = $dbr->selectField(
1095                         'revision',
1096                         'MIN( rev_timestamp )',
1097                         [ 'rev_page' => $title->getArticleID() ],
1098                         __METHOD__
1099                 );
1100
1101                 // New page patrol: Get the timestamp of the oldest revison which
1102                 // the revision table holds for the given page. Then we look
1103                 // whether it's within the RC lifespan and if it is, we try
1104                 // to get the recentchanges row belonging to that entry
1105                 // (with rc_new = 1).
1106                 $recentPageCreation = false;
1107                 if ( $oldestRevisionTimestamp
1108                         && RecentChange::isInRCLifespan( $oldestRevisionTimestamp, 21600 )
1109                 ) {
1110                         // 6h tolerance because the RC might not be cleaned out regularly
1111                         $recentPageCreation = true;
1112                         $rc = RecentChange::newFromConds(
1113                                 [
1114                                         'rc_new' => 1,
1115                                         'rc_timestamp' => $oldestRevisionTimestamp,
1116                                         'rc_namespace' => $title->getNamespace(),
1117                                         'rc_cur_id' => $title->getArticleID()
1118                                 ],
1119                                 __METHOD__
1120                         );
1121                         if ( $rc ) {
1122                                 // Use generic patrol message for new pages
1123                                 $markPatrolledMsg = wfMessage( 'markaspatrolledtext' );
1124                         }
1125                 }
1126
1127                 // File patrol: Get the timestamp of the latest upload for this page,
1128                 // check whether it is within the RC lifespan and if it is, we try
1129                 // to get the recentchanges row belonging to that entry
1130                 // (with rc_type = RC_LOG, rc_log_type = upload).
1131                 $recentFileUpload = false;
1132                 if ( ( !$rc || $rc->getAttribute( 'rc_patrolled' ) ) && $wgUseFilePatrol
1133                         && $title->getNamespace() === NS_FILE ) {
1134                         // Retrieve timestamp of most recent upload
1135                         $newestUploadTimestamp = $dbr->selectField(
1136                                 'image',
1137                                 'MAX( img_timestamp )',
1138                                 [ 'img_name' => $title->getDBkey() ],
1139                                 __METHOD__
1140                         );
1141                         if ( $newestUploadTimestamp
1142                                 && RecentChange::isInRCLifespan( $newestUploadTimestamp, 21600 )
1143                         ) {
1144                                 // 6h tolerance because the RC might not be cleaned out regularly
1145                                 $recentFileUpload = true;
1146                                 $rc = RecentChange::newFromConds(
1147                                         [
1148                                                 'rc_type' => RC_LOG,
1149                                                 'rc_log_type' => 'upload',
1150                                                 'rc_timestamp' => $newestUploadTimestamp,
1151                                                 'rc_namespace' => NS_FILE,
1152                                                 'rc_cur_id' => $title->getArticleID()
1153                                         ],
1154                                         __METHOD__,
1155                                         [ 'USE INDEX' => 'rc_timestamp' ]
1156                                 );
1157                                 if ( $rc ) {
1158                                         // Use patrol message specific to files
1159                                         $markPatrolledMsg = wfMessage( 'markaspatrolledtext-file' );
1160                                 }
1161                         }
1162                 }
1163
1164                 if ( !$recentPageCreation && !$recentFileUpload ) {
1165                         // Page creation and latest upload (for files) is too old to be in RC
1166
1167                         // We definitely can't patrol so cache the information
1168                         // When a new file version is uploaded, the cache is cleared
1169                         $cache->set( $key, '1' );
1170
1171                         return false;
1172                 }
1173
1174                 if ( !$rc ) {
1175                         // Don't cache: This can be hit if the page gets accessed very fast after
1176                         // its creation / latest upload or in case we have high slave lag. In case
1177                         // the revision is too old, we will already return above.
1178                         return false;
1179                 }
1180
1181                 if ( $rc->getAttribute( 'rc_patrolled' ) ) {
1182                         // Patrolled RC entry around
1183
1184                         // Cache the information we gathered above in case we can't patrol
1185                         // Don't cache in case we can patrol as this could change
1186                         $cache->set( $key, '1' );
1187
1188                         return false;
1189                 }
1190
1191                 if ( $rc->getPerformer()->equals( $user ) ) {
1192                         // Don't show a patrol link for own creations/uploads. If the user could
1193                         // patrol them, they already would be patrolled
1194                         return false;
1195                 }
1196
1197                 $rcid = $rc->getAttribute( 'rc_id' );
1198
1199                 $token = $user->getEditToken( $rcid );
1200
1201                 $outputPage->preventClickjacking();
1202                 if ( $wgEnableAPI && $wgEnableWriteAPI && $user->isAllowed( 'writeapi' ) ) {
1203                         $outputPage->addModules( 'mediawiki.page.patrol.ajax' );
1204                 }
1205
1206                 $link = Linker::linkKnown(
1207                         $title,
1208                         $markPatrolledMsg->escaped(),
1209                         [],
1210                         [
1211                                 'action' => 'markpatrolled',
1212                                 'rcid' => $rcid,
1213                                 'token' => $token,
1214                         ]
1215                 );
1216
1217                 $outputPage->addHTML(
1218                         "<div class='patrollink' data-mw='interface'>" .
1219                                 wfMessage( 'markaspatrolledlink' )->rawParams( $link )->escaped() .
1220                         '</div>'
1221                 );
1222
1223                 return true;
1224         }
1225
1226         /**
1227          * Purge the cache used to check if it is worth showing the patrol footer
1228          * For example, it is done during re-uploads when file patrol is used.
1229          * @param int $articleID ID of the article to purge
1230          * @since 1.27
1231          */
1232         public static function purgePatrolFooterCache( $articleID ) {
1233                 $cache = ObjectCache::getMainWANInstance();
1234                 $cache->delete( wfMemcKey( 'unpatrollable-page', $articleID ) );
1235         }
1236
1237         /**
1238          * Show the error text for a missing article. For articles in the MediaWiki
1239          * namespace, show the default message text. To be called from Article::view().
1240          */
1241         public function showMissingArticle() {
1242                 global $wgSend404Code;
1243
1244                 $outputPage = $this->getContext()->getOutput();
1245                 // Whether the page is a root user page of an existing user (but not a subpage)
1246                 $validUserPage = false;
1247
1248                 $title = $this->getTitle();
1249
1250                 # Show info in user (talk) namespace. Does the user exist? Is he blocked?
1251                 if ( $title->getNamespace() == NS_USER
1252                         || $title->getNamespace() == NS_USER_TALK
1253                 ) {
1254                         $rootPart = explode( '/', $title->getText() )[0];
1255                         $user = User::newFromName( $rootPart, false /* allow IP users*/ );
1256                         $ip = User::isIP( $rootPart );
1257                         $block = Block::newFromTarget( $user, $user );
1258
1259                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
1260                                 $outputPage->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n\$1\n</div>",
1261                                         [ 'userpage-userdoesnotexist-view', wfEscapeWikiText( $rootPart ) ] );
1262                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
1263                                 # Show log extract if the user is currently blocked
1264                                 LogEventsList::showLogExtract(
1265                                         $outputPage,
1266                                         'block',
1267                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
1268                                         '',
1269                                         [
1270                                                 'lim' => 1,
1271                                                 'showIfEmpty' => false,
1272                                                 'msgKey' => [
1273                                                         'blocked-notice-logextract',
1274                                                         $user->getName() # Support GENDER in notice
1275                                                 ]
1276                                         ]
1277                                 );
1278                                 $validUserPage = !$title->isSubpage();
1279                         } else {
1280                                 $validUserPage = !$title->isSubpage();
1281                         }
1282                 }
1283
1284                 Hooks::run( 'ShowMissingArticle', [ $this ] );
1285
1286                 # Show delete and move logs if there were any such events.
1287                 # The logging query can DOS the site when bots/crawlers cause 404 floods,
1288                 # so be careful showing this. 404 pages must be cheap as they are hard to cache.
1289                 $cache = ObjectCache::getMainStashInstance();
1290                 $key = wfMemcKey( 'page-recent-delete', md5( $title->getPrefixedText() ) );
1291                 $loggedIn = $this->getContext()->getUser()->isLoggedIn();
1292                 if ( $loggedIn || $cache->get( $key ) ) {
1293                         $logTypes = [ 'delete', 'move' ];
1294                         $conds = [ "log_action != 'revision'" ];
1295                         // Give extensions a chance to hide their (unrelated) log entries
1296                         Hooks::run( 'Article::MissingArticleConditions', [ &$conds, $logTypes ] );
1297                         LogEventsList::showLogExtract(
1298                                 $outputPage,
1299                                 $logTypes,
1300                                 $title,
1301                                 '',
1302                                 [
1303                                         'lim' => 10,
1304                                         'conds' => $conds,
1305                                         'showIfEmpty' => false,
1306                                         'msgKey' => [ $loggedIn
1307                                                 ? 'moveddeleted-notice'
1308                                                 : 'moveddeleted-notice-recent'
1309                                         ]
1310                                 ]
1311                         );
1312                 }
1313
1314                 if ( !$this->mPage->hasViewableContent() && $wgSend404Code && !$validUserPage ) {
1315                         // If there's no backing content, send a 404 Not Found
1316                         // for better machine handling of broken links.
1317                         $this->getContext()->getRequest()->response()->statusHeader( 404 );
1318                 }
1319
1320                 // Also apply the robot policy for nonexisting pages (even if a 404 was used for sanity)
1321                 $policy = $this->getRobotPolicy( 'view' );
1322                 $outputPage->setIndexPolicy( $policy['index'] );
1323                 $outputPage->setFollowPolicy( $policy['follow'] );
1324
1325                 $hookResult = Hooks::run( 'BeforeDisplayNoArticleText', [ $this ] );
1326
1327                 if ( !$hookResult ) {
1328                         return;
1329                 }
1330
1331                 # Show error message
1332                 $oldid = $this->getOldID();
1333                 if ( !$oldid && $title->getNamespace() === NS_MEDIAWIKI && $title->hasSourceText() ) {
1334                         $outputPage->addParserOutput( $this->getContentObject()->getParserOutput( $title ) );
1335                 } else {
1336                         if ( $oldid ) {
1337                                 $text = wfMessage( 'missing-revision', $oldid )->plain();
1338                         } elseif ( $title->quickUserCan( 'create', $this->getContext()->getUser() )
1339                                 && $title->quickUserCan( 'edit', $this->getContext()->getUser() )
1340                         ) {
1341                                 $message = $this->getContext()->getUser()->isLoggedIn() ? 'noarticletext' : 'noarticletextanon';
1342                                 $text = wfMessage( $message )->plain();
1343                         } else {
1344                                 $text = wfMessage( 'noarticletext-nopermission' )->plain();
1345                         }
1346
1347                         $dir = $this->getContext()->getLanguage()->getDir();
1348                         $lang = $this->getContext()->getLanguage()->getCode();
1349                         $outputPage->addWikiText( Xml::openElement( 'div', [
1350                                 'class' => "noarticletext mw-content-$dir",
1351                                 'dir' => $dir,
1352                                 'lang' => $lang,
1353                         ] ) . "\n$text\n</div>" );
1354                 }
1355         }
1356
1357         /**
1358          * If the revision requested for view is deleted, check permissions.
1359          * Send either an error message or a warning header to the output.
1360          *
1361          * @return bool True if the view is allowed, false if not.
1362          */
1363         public function showDeletedRevisionHeader() {
1364                 if ( !$this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1365                         // Not deleted
1366                         return true;
1367                 }
1368
1369                 $outputPage = $this->getContext()->getOutput();
1370                 $user = $this->getContext()->getUser();
1371                 // If the user is not allowed to see it...
1372                 if ( !$this->mRevision->userCan( Revision::DELETED_TEXT, $user ) ) {
1373                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1374                                 'rev-deleted-text-permission' );
1375
1376                         return false;
1377                 // If the user needs to confirm that they want to see it...
1378                 } elseif ( $this->getContext()->getRequest()->getInt( 'unhide' ) != 1 ) {
1379                         # Give explanation and add a link to view the revision...
1380                         $oldid = intval( $this->getOldID() );
1381                         $link = $this->getTitle()->getFullURL( "oldid={$oldid}&unhide=1" );
1382                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1383                                 'rev-suppressed-text-unhide' : 'rev-deleted-text-unhide';
1384                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1385                                 [ $msg, $link ] );
1386
1387                         return false;
1388                 // We are allowed to see...
1389                 } else {
1390                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1391                                 'rev-suppressed-text-view' : 'rev-deleted-text-view';
1392                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", $msg );
1393
1394                         return true;
1395                 }
1396         }
1397
1398         /**
1399          * Generate the navigation links when browsing through an article revisions
1400          * It shows the information as:
1401          *   Revision as of \<date\>; view current revision
1402          *   \<- Previous version | Next Version -\>
1403          *
1404          * @param int $oldid Revision ID of this article revision
1405          */
1406         public function setOldSubtitle( $oldid = 0 ) {
1407                 if ( !Hooks::run( 'DisplayOldSubtitle', [ &$this, &$oldid ] ) ) {
1408                         return;
1409                 }
1410
1411                 $context = $this->getContext();
1412                 $unhide = $context->getRequest()->getInt( 'unhide' ) == 1;
1413
1414                 # Cascade unhide param in links for easy deletion browsing
1415                 $extraParams = [];
1416                 if ( $unhide ) {
1417                         $extraParams['unhide'] = 1;
1418                 }
1419
1420                 if ( $this->mRevision && $this->mRevision->getId() === $oldid ) {
1421                         $revision = $this->mRevision;
1422                 } else {
1423                         $revision = Revision::newFromId( $oldid );
1424                 }
1425
1426                 $timestamp = $revision->getTimestamp();
1427
1428                 $current = ( $oldid == $this->mPage->getLatest() );
1429                 $language = $context->getLanguage();
1430                 $user = $context->getUser();
1431
1432                 $td = $language->userTimeAndDate( $timestamp, $user );
1433                 $tddate = $language->userDate( $timestamp, $user );
1434                 $tdtime = $language->userTime( $timestamp, $user );
1435
1436                 # Show user links if allowed to see them. If hidden, then show them only if requested...
1437                 $userlinks = Linker::revUserTools( $revision, !$unhide );
1438
1439                 $infomsg = $current && !$context->msg( 'revision-info-current' )->isDisabled()
1440                         ? 'revision-info-current'
1441                         : 'revision-info';
1442
1443                 $outputPage = $context->getOutput();
1444                 $revisionInfo = "<div id=\"mw-{$infomsg}\">" .
1445                         $context->msg( $infomsg, $td )
1446                                 ->rawParams( $userlinks )
1447                                 ->params( $revision->getId(), $tddate, $tdtime, $revision->getUserText() )
1448                                 ->rawParams( Linker::revComment( $revision, true, true ) )
1449                                 ->parse() .
1450                         "</div>";
1451
1452                 $lnk = $current
1453                         ? $context->msg( 'currentrevisionlink' )->escaped()
1454                         : Linker::linkKnown(
1455                                 $this->getTitle(),
1456                                 $context->msg( 'currentrevisionlink' )->escaped(),
1457                                 [],
1458                                 $extraParams
1459                         );
1460                 $curdiff = $current
1461                         ? $context->msg( 'diff' )->escaped()
1462                         : Linker::linkKnown(
1463                                 $this->getTitle(),
1464                                 $context->msg( 'diff' )->escaped(),
1465                                 [],
1466                                 [
1467                                         'diff' => 'cur',
1468                                         'oldid' => $oldid
1469                                 ] + $extraParams
1470                         );
1471                 $prev = $this->getTitle()->getPreviousRevisionID( $oldid );
1472                 $prevlink = $prev
1473                         ? Linker::linkKnown(
1474                                 $this->getTitle(),
1475                                 $context->msg( 'previousrevision' )->escaped(),
1476                                 [],
1477                                 [
1478                                         'direction' => 'prev',
1479                                         'oldid' => $oldid
1480                                 ] + $extraParams
1481                         )
1482                         : $context->msg( 'previousrevision' )->escaped();
1483                 $prevdiff = $prev
1484                         ? Linker::linkKnown(
1485                                 $this->getTitle(),
1486                                 $context->msg( 'diff' )->escaped(),
1487                                 [],
1488                                 [
1489                                         'diff' => 'prev',
1490                                         'oldid' => $oldid
1491                                 ] + $extraParams
1492                         )
1493                         : $context->msg( 'diff' )->escaped();
1494                 $nextlink = $current
1495                         ? $context->msg( 'nextrevision' )->escaped()
1496                         : Linker::linkKnown(
1497                                 $this->getTitle(),
1498                                 $context->msg( 'nextrevision' )->escaped(),
1499                                 [],
1500                                 [
1501                                         'direction' => 'next',
1502                                         'oldid' => $oldid
1503                                 ] + $extraParams
1504                         );
1505                 $nextdiff = $current
1506                         ? $context->msg( 'diff' )->escaped()
1507                         : Linker::linkKnown(
1508                                 $this->getTitle(),
1509                                 $context->msg( 'diff' )->escaped(),
1510                                 [],
1511                                 [
1512                                         'diff' => 'next',
1513                                         'oldid' => $oldid
1514                                 ] + $extraParams
1515                         );
1516
1517                 $cdel = Linker::getRevDeleteLink( $user, $revision, $this->getTitle() );
1518                 if ( $cdel !== '' ) {
1519                         $cdel .= ' ';
1520                 }
1521
1522                 // the outer div is need for styling the revision info and nav in MobileFrontend
1523                 $outputPage->addSubtitle( "<div class=\"mw-revision\">" . $revisionInfo .
1524                         "<div id=\"mw-revision-nav\">" . $cdel .
1525                         $context->msg( 'revision-nav' )->rawParams(
1526                                 $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff
1527                         )->escaped() . "</div></div>" );
1528         }
1529
1530         /**
1531          * Return the HTML for the top of a redirect page
1532          *
1533          * Chances are you should just be using the ParserOutput from
1534          * WikitextContent::getParserOutput instead of calling this for redirects.
1535          *
1536          * @param Title|array $target Destination(s) to redirect
1537          * @param bool $appendSubtitle [optional]
1538          * @param bool $forceKnown Should the image be shown as a bluelink regardless of existence?
1539          * @return string Containing HTML with redirect link
1540          */
1541         public function viewRedirect( $target, $appendSubtitle = true, $forceKnown = false ) {
1542                 $lang = $this->getTitle()->getPageLanguage();
1543                 $out = $this->getContext()->getOutput();
1544                 if ( $appendSubtitle ) {
1545                         $out->addSubtitle( wfMessage( 'redirectpagesub' ) );
1546                 }
1547                 $out->addModuleStyles( 'mediawiki.action.view.redirectPage' );
1548                 return static::getRedirectHeaderHtml( $lang, $target, $forceKnown );
1549         }
1550
1551         /**
1552          * Return the HTML for the top of a redirect page
1553          *
1554          * Chances are you should just be using the ParserOutput from
1555          * WikitextContent::getParserOutput instead of calling this for redirects.
1556          *
1557          * @since 1.23
1558          * @param Language $lang
1559          * @param Title|array $target Destination(s) to redirect
1560          * @param bool $forceKnown Should the image be shown as a bluelink regardless of existence?
1561          * @return string Containing HTML with redirect link
1562          */
1563         public static function getRedirectHeaderHtml( Language $lang, $target, $forceKnown = false ) {
1564                 if ( !is_array( $target ) ) {
1565                         $target = [ $target ];
1566                 }
1567
1568                 $html = '<ul class="redirectText">';
1569                 /** @var Title $title */
1570                 foreach ( $target as $title ) {
1571                         $html .= '<li>' . Linker::link(
1572                                 $title,
1573                                 htmlspecialchars( $title->getFullText() ),
1574                                 [],
1575                                 // Make sure wiki page redirects are not followed
1576                                 $title->isRedirect() ? [ 'redirect' => 'no' ] : [],
1577                                 ( $forceKnown ? [ 'known', 'noclasses' ] : [] )
1578                         ) . '</li>';
1579                 }
1580                 $html .= '</ul>';
1581
1582                 $redirectToText = wfMessage( 'redirectto' )->inLanguage( $lang )->escaped();
1583
1584                 return '<div class="redirectMsg">' .
1585                         '<p>' . $redirectToText . '</p>' .
1586                         $html .
1587                         '</div>';
1588         }
1589
1590         /**
1591          * Adds help link with an icon via page indicators.
1592          * Link target can be overridden by a local message containing a wikilink:
1593          * the message key is: 'namespace-' + namespace number + '-helppage'.
1594          * @param string $to Target MediaWiki.org page title or encoded URL.
1595          * @param bool $overrideBaseUrl Whether $url is a full URL, to avoid MW.o.
1596          * @since 1.25
1597          */
1598         public function addHelpLink( $to, $overrideBaseUrl = false ) {
1599                 $msg = wfMessage(
1600                         'namespace-' . $this->getTitle()->getNamespace() . '-helppage'
1601                 );
1602
1603                 $out = $this->getContext()->getOutput();
1604                 if ( !$msg->isDisabled() ) {
1605                         $helpUrl = Skin::makeUrl( $msg->plain() );
1606                         $out->addHelpLink( $helpUrl, true );
1607                 } else {
1608                         $out->addHelpLink( $to, $overrideBaseUrl );
1609                 }
1610         }
1611
1612         /**
1613          * Handle action=render
1614          */
1615         public function render() {
1616                 $this->getContext()->getRequest()->response()->header( 'X-Robots-Tag: noindex' );
1617                 $this->getContext()->getOutput()->setArticleBodyOnly( true );
1618                 $this->getContext()->getOutput()->enableSectionEditLinks( false );
1619                 $this->view();
1620         }
1621
1622         /**
1623          * action=protect handler
1624          */
1625         public function protect() {
1626                 $form = new ProtectionForm( $this );
1627                 $form->execute();
1628         }
1629
1630         /**
1631          * action=unprotect handler (alias)
1632          */
1633         public function unprotect() {
1634                 $this->protect();
1635         }
1636
1637         /**
1638          * UI entry point for page deletion
1639          */
1640         public function delete() {
1641                 # This code desperately needs to be totally rewritten
1642
1643                 $title = $this->getTitle();
1644                 $context = $this->getContext();
1645                 $user = $context->getUser();
1646                 $request = $context->getRequest();
1647
1648                 # Check permissions
1649                 $permissionErrors = $title->getUserPermissionsErrors( 'delete', $user );
1650                 if ( count( $permissionErrors ) ) {
1651                         throw new PermissionsError( 'delete', $permissionErrors );
1652                 }
1653
1654                 # Read-only check...
1655                 if ( wfReadOnly() ) {
1656                         throw new ReadOnlyError;
1657                 }
1658
1659                 # Better double-check that it hasn't been deleted yet!
1660                 $this->mPage->loadPageData(
1661                         $request->wasPosted() ? WikiPage::READ_LATEST : WikiPage::READ_NORMAL
1662                 );
1663                 if ( !$this->mPage->exists() ) {
1664                         $deleteLogPage = new LogPage( 'delete' );
1665                         $outputPage = $context->getOutput();
1666                         $outputPage->setPageTitle( $context->msg( 'cannotdelete-title', $title->getPrefixedText() ) );
1667                         $outputPage->wrapWikiMsg( "<div class=\"error mw-error-cannotdelete\">\n$1\n</div>",
1668                                         [ 'cannotdelete', wfEscapeWikiText( $title->getPrefixedText() ) ]
1669                                 );
1670                         $outputPage->addHTML(
1671                                 Xml::element( 'h2', null, $deleteLogPage->getName()->text() )
1672                         );
1673                         LogEventsList::showLogExtract(
1674                                 $outputPage,
1675                                 'delete',
1676                                 $title
1677                         );
1678
1679                         return;
1680                 }
1681
1682                 $deleteReasonList = $request->getText( 'wpDeleteReasonList', 'other' );
1683                 $deleteReason = $request->getText( 'wpReason' );
1684
1685                 if ( $deleteReasonList == 'other' ) {
1686                         $reason = $deleteReason;
1687                 } elseif ( $deleteReason != '' ) {
1688                         // Entry from drop down menu + additional comment
1689                         $colonseparator = wfMessage( 'colon-separator' )->inContentLanguage()->text();
1690                         $reason = $deleteReasonList . $colonseparator . $deleteReason;
1691                 } else {
1692                         $reason = $deleteReasonList;
1693                 }
1694
1695                 if ( $request->wasPosted() && $user->matchEditToken( $request->getVal( 'wpEditToken' ),
1696                         [ 'delete', $this->getTitle()->getPrefixedText() ] )
1697                 ) {
1698                         # Flag to hide all contents of the archived revisions
1699                         $suppress = $request->getVal( 'wpSuppress' ) && $user->isAllowed( 'suppressrevision' );
1700
1701                         $this->doDelete( $reason, $suppress );
1702
1703                         WatchAction::doWatchOrUnwatch( $request->getCheck( 'wpWatch' ), $title, $user );
1704
1705                         return;
1706                 }
1707
1708                 // Generate deletion reason
1709                 $hasHistory = false;
1710                 if ( !$reason ) {
1711                         try {
1712                                 $reason = $this->generateReason( $hasHistory );
1713                         } catch ( Exception $e ) {
1714                                 # if a page is horribly broken, we still want to be able to
1715                                 # delete it. So be lenient about errors here.
1716                                 wfDebug( "Error while building auto delete summary: $e" );
1717                                 $reason = '';
1718                         }
1719                 }
1720
1721                 // If the page has a history, insert a warning
1722                 if ( $hasHistory ) {
1723                         $title = $this->getTitle();
1724
1725                         // The following can use the real revision count as this is only being shown for users
1726                         // that can delete this page.
1727                         // This, as a side-effect, also makes sure that the following query isn't being run for
1728                         // pages with a larger history, unless the user has the 'bigdelete' right
1729                         // (and is about to delete this page).
1730                         $dbr = wfGetDB( DB_SLAVE );
1731                         $revisions = $edits = (int)$dbr->selectField(
1732                                 'revision',
1733                                 'COUNT(rev_page)',
1734                                 [ 'rev_page' => $title->getArticleID() ],
1735                                 __METHOD__
1736                         );
1737
1738                         // @todo FIXME: i18n issue/patchwork message
1739                         $context->getOutput()->addHTML(
1740                                 '<strong class="mw-delete-warning-revisions">' .
1741                                 $context->msg( 'historywarning' )->numParams( $revisions )->parse() .
1742                                 $context->msg( 'word-separator' )->escaped() . Linker::linkKnown( $title,
1743                                         $context->msg( 'history' )->escaped(),
1744                                         [],
1745                                         [ 'action' => 'history' ] ) .
1746                                 '</strong>'
1747                         );
1748
1749                         if ( $title->isBigDeletion() ) {
1750                                 global $wgDeleteRevisionsLimit;
1751                                 $context->getOutput()->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
1752                                         [
1753                                                 'delete-warning-toobig',
1754                                                 $context->getLanguage()->formatNum( $wgDeleteRevisionsLimit )
1755                                         ]
1756                                 );
1757                         }
1758                 }
1759
1760                 $this->confirmDelete( $reason );
1761         }
1762
1763         /**
1764          * Output deletion confirmation dialog
1765          * @todo FIXME: Move to another file?
1766          * @param string $reason Prefilled reason
1767          */
1768         public function confirmDelete( $reason ) {
1769                 wfDebug( "Article::confirmDelete\n" );
1770
1771                 $title = $this->getTitle();
1772                 $ctx = $this->getContext();
1773                 $outputPage = $ctx->getOutput();
1774                 $useMediaWikiUIEverywhere = $ctx->getConfig()->get( 'UseMediaWikiUIEverywhere' );
1775                 $outputPage->setPageTitle( wfMessage( 'delete-confirm', $title->getPrefixedText() ) );
1776                 $outputPage->addBacklinkSubtitle( $title );
1777                 $outputPage->setRobotPolicy( 'noindex,nofollow' );
1778                 $backlinkCache = $title->getBacklinkCache();
1779                 if ( $backlinkCache->hasLinks( 'pagelinks' ) || $backlinkCache->hasLinks( 'templatelinks' ) ) {
1780                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1781                                 'deleting-backlinks-warning' );
1782                 }
1783                 $outputPage->addWikiMsg( 'confirmdeletetext' );
1784
1785                 Hooks::run( 'ArticleConfirmDelete', [ $this, $outputPage, &$reason ] );
1786
1787                 $user = $this->getContext()->getUser();
1788
1789                 if ( $user->isAllowed( 'suppressrevision' ) ) {
1790                         $suppress = Html::openElement( 'div', [ 'id' => 'wpDeleteSuppressRow' ] ) .
1791                                 Xml::checkLabel( wfMessage( 'revdelete-suppress' )->text(),
1792                                         'wpSuppress', 'wpSuppress', false, [ 'tabindex' => '4' ] ) .
1793                                 Html::closeElement( 'div' );
1794                 } else {
1795                         $suppress = '';
1796                 }
1797                 $checkWatch = $user->getBoolOption( 'watchdeletion' ) || $user->isWatched( $title );
1798
1799                 $form = Html::openElement( 'form', [ 'method' => 'post',
1800                         'action' => $title->getLocalURL( 'action=delete' ), 'id' => 'deleteconfirm' ] ) .
1801                         Html::openElement( 'fieldset', [ 'id' => 'mw-delete-table' ] ) .
1802                         Html::element( 'legend', null, wfMessage( 'delete-legend' )->text() ) .
1803                         Html::openElement( 'div', [ 'id' => 'mw-deleteconfirm-table' ] ) .
1804                         Html::openElement( 'div', [ 'id' => 'wpDeleteReasonListRow' ] ) .
1805                         Html::label( wfMessage( 'deletecomment' )->text(), 'wpDeleteReasonList' ) .
1806                         '&nbsp;' .
1807                         Xml::listDropDown(
1808                                 'wpDeleteReasonList',
1809                                 wfMessage( 'deletereason-dropdown' )->inContentLanguage()->text(),
1810                                 wfMessage( 'deletereasonotherlist' )->inContentLanguage()->text(),
1811                                 '',
1812                                 'wpReasonDropDown',
1813                                 1
1814                         ) .
1815                         Html::closeElement( 'div' ) .
1816                         Html::openElement( 'div', [ 'id' => 'wpDeleteReasonRow' ] ) .
1817                         Html::label( wfMessage( 'deleteotherreason' )->text(), 'wpReason' ) .
1818                         '&nbsp;' .
1819                         Html::input( 'wpReason', $reason, 'text', [
1820                                 'size' => '60',
1821                                 'maxlength' => '255',
1822                                 'tabindex' => '2',
1823                                 'id' => 'wpReason',
1824                                 'class' => 'mw-ui-input-inline',
1825                                 'autofocus'
1826                         ] ) .
1827                         Html::closeElement( 'div' );
1828
1829                 # Disallow watching if user is not logged in
1830                 if ( $user->isLoggedIn() ) {
1831                         $form .=
1832                                         Xml::checkLabel( wfMessage( 'watchthis' )->text(),
1833                                                 'wpWatch', 'wpWatch', $checkWatch, [ 'tabindex' => '3' ] );
1834                 }
1835
1836                 $form .=
1837                                 Html::openElement( 'div' ) .
1838                                 $suppress .
1839                                         Xml::submitButton( wfMessage( 'deletepage' )->text(),
1840                                                 [
1841                                                         'name' => 'wpConfirmB',
1842                                                         'id' => 'wpConfirmB',
1843                                                         'tabindex' => '5',
1844                                                         'class' => $useMediaWikiUIEverywhere ? 'mw-ui-button mw-ui-destructive' : '',
1845                                                 ]
1846                                         ) .
1847                                 Html::closeElement( 'div' ) .
1848                         Html::closeElement( 'div' ) .
1849                         Xml::closeElement( 'fieldset' ) .
1850                         Html::hidden(
1851                                 'wpEditToken',
1852                                 $user->getEditToken( [ 'delete', $title->getPrefixedText() ] )
1853                         ) .
1854                         Xml::closeElement( 'form' );
1855
1856                         if ( $user->isAllowed( 'editinterface' ) ) {
1857                                 $link = Linker::linkKnown(
1858                                         $ctx->msg( 'deletereason-dropdown' )->inContentLanguage()->getTitle(),
1859                                         wfMessage( 'delete-edit-reasonlist' )->escaped(),
1860                                         [],
1861                                         [ 'action' => 'edit' ]
1862                                 );
1863                                 $form .= '<p class="mw-delete-editreasons">' . $link . '</p>';
1864                         }
1865
1866                 $outputPage->addHTML( $form );
1867
1868                 $deleteLogPage = new LogPage( 'delete' );
1869                 $outputPage->addHTML( Xml::element( 'h2', null, $deleteLogPage->getName()->text() ) );
1870                 LogEventsList::showLogExtract( $outputPage, 'delete', $title );
1871         }
1872
1873         /**
1874          * Perform a deletion and output success or failure messages
1875          * @param string $reason
1876          * @param bool $suppress
1877          */
1878         public function doDelete( $reason, $suppress = false ) {
1879                 $error = '';
1880                 $context = $this->getContext();
1881                 $outputPage = $context->getOutput();
1882                 $user = $context->getUser();
1883                 $status = $this->mPage->doDeleteArticleReal( $reason, $suppress, 0, true, $error, $user );
1884
1885                 if ( $status->isGood() ) {
1886                         $deleted = $this->getTitle()->getPrefixedText();
1887
1888                         $outputPage->setPageTitle( wfMessage( 'actioncomplete' ) );
1889                         $outputPage->setRobotPolicy( 'noindex,nofollow' );
1890
1891                         $loglink = '[[Special:Log/delete|' . wfMessage( 'deletionlog' )->text() . ']]';
1892
1893                         $outputPage->addWikiMsg( 'deletedtext', wfEscapeWikiText( $deleted ), $loglink );
1894
1895                         Hooks::run( 'ArticleDeleteAfterSuccess', [ $this->getTitle(), $outputPage ] );
1896
1897                         $outputPage->returnToMain( false );
1898                 } else {
1899                         $outputPage->setPageTitle(
1900                                 wfMessage( 'cannotdelete-title',
1901                                         $this->getTitle()->getPrefixedText() )
1902                         );
1903
1904                         if ( $error == '' ) {
1905                                 $outputPage->addWikiText(
1906                                         "<div class=\"error mw-error-cannotdelete\">\n" . $status->getWikiText() . "\n</div>"
1907                                 );
1908                                 $deleteLogPage = new LogPage( 'delete' );
1909                                 $outputPage->addHTML( Xml::element( 'h2', null, $deleteLogPage->getName()->text() ) );
1910
1911                                 LogEventsList::showLogExtract(
1912                                         $outputPage,
1913                                         'delete',
1914                                         $this->getTitle()
1915                                 );
1916                         } else {
1917                                 $outputPage->addHTML( $error );
1918                         }
1919                 }
1920         }
1921
1922         /* Caching functions */
1923
1924         /**
1925          * checkLastModified returns true if it has taken care of all
1926          * output to the client that is necessary for this request.
1927          * (that is, it has sent a cached version of the page)
1928          *
1929          * @return bool True if cached version send, false otherwise
1930          */
1931         protected function tryFileCache() {
1932                 static $called = false;
1933
1934                 if ( $called ) {
1935                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
1936                         return false;
1937                 }
1938
1939                 $called = true;
1940                 if ( $this->isFileCacheable() ) {
1941                         $cache = new HTMLFileCache( $this->getTitle(), 'view' );
1942                         if ( $cache->isCacheGood( $this->mPage->getTouched() ) ) {
1943                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
1944                                 $cache->loadFromFileCache( $this->getContext() );
1945                                 return true;
1946                         } else {
1947                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
1948                                 ob_start( [ &$cache, 'saveToFileCache' ] );
1949                         }
1950                 } else {
1951                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
1952                 }
1953
1954                 return false;
1955         }
1956
1957         /**
1958          * Check if the page can be cached
1959          * @return bool
1960          */
1961         public function isFileCacheable() {
1962                 $cacheable = false;
1963
1964                 if ( HTMLFileCache::useFileCache( $this->getContext() ) ) {
1965                         $cacheable = $this->mPage->getId()
1966                                 && !$this->mRedirectedFrom && !$this->getTitle()->isRedirect();
1967                         // Extension may have reason to disable file caching on some pages.
1968                         if ( $cacheable ) {
1969                                 $cacheable = Hooks::run( 'IsFileCacheable', [ &$this ] );
1970                         }
1971                 }
1972
1973                 return $cacheable;
1974         }
1975
1976         /**#@-*/
1977
1978         /**
1979          * Lightweight method to get the parser output for a page, checking the parser cache
1980          * and so on. Doesn't consider most of the stuff that WikiPage::view is forced to
1981          * consider, so it's not appropriate to use there.
1982          *
1983          * @since 1.16 (r52326) for LiquidThreads
1984          *
1985          * @param int|null $oldid Revision ID or null
1986          * @param User $user The relevant user
1987          * @return ParserOutput|bool ParserOutput or false if the given revision ID is not found
1988          */
1989         public function getParserOutput( $oldid = null, User $user = null ) {
1990                 // XXX: bypasses mParserOptions and thus setParserOptions()
1991
1992                 if ( $user === null ) {
1993                         $parserOptions = $this->getParserOptions();
1994                 } else {
1995                         $parserOptions = $this->mPage->makeParserOptions( $user );
1996                 }
1997
1998                 return $this->mPage->getParserOutput( $parserOptions, $oldid );
1999         }
2000
2001         /**
2002          * Override the ParserOptions used to render the primary article wikitext.
2003          *
2004          * @param ParserOptions $options
2005          * @throws MWException If the parser options where already initialized.
2006          */
2007         public function setParserOptions( ParserOptions $options ) {
2008                 if ( $this->mParserOptions ) {
2009                         throw new MWException( "can't change parser options after they have already been set" );
2010                 }
2011
2012                 // clone, so if $options is modified later, it doesn't confuse the parser cache.
2013                 $this->mParserOptions = clone $options;
2014         }
2015
2016         /**
2017          * Get parser options suitable for rendering the primary article wikitext
2018          * @return ParserOptions
2019          */
2020         public function getParserOptions() {
2021                 if ( !$this->mParserOptions ) {
2022                         $this->mParserOptions = $this->mPage->makeParserOptions( $this->getContext() );
2023                 }
2024                 // Clone to allow modifications of the return value without affecting cache
2025                 return clone $this->mParserOptions;
2026         }
2027
2028         /**
2029          * Sets the context this Article is executed in
2030          *
2031          * @param IContextSource $context
2032          * @since 1.18
2033          */
2034         public function setContext( $context ) {
2035                 $this->mContext = $context;
2036         }
2037
2038         /**
2039          * Gets the context this Article is executed in
2040          *
2041          * @return IContextSource
2042          * @since 1.18
2043          */
2044         public function getContext() {
2045                 if ( $this->mContext instanceof IContextSource ) {
2046                         return $this->mContext;
2047                 } else {
2048                         wfDebug( __METHOD__ . " called and \$mContext is null. " .
2049                                 "Return RequestContext::getMain(); for sanity\n" );
2050                         return RequestContext::getMain();
2051                 }
2052         }
2053
2054         /**
2055          * Use PHP's magic __get handler to handle accessing of
2056          * raw WikiPage fields for backwards compatibility.
2057          *
2058          * @param string $fname Field name
2059          * @return mixed
2060          */
2061         public function __get( $fname ) {
2062                 if ( property_exists( $this->mPage, $fname ) ) {
2063                         # wfWarn( "Access to raw $fname field " . __CLASS__ );
2064                         return $this->mPage->$fname;
2065                 }
2066                 trigger_error( 'Inaccessible property via __get(): ' . $fname, E_USER_NOTICE );
2067         }
2068
2069         /**
2070          * Use PHP's magic __set handler to handle setting of
2071          * raw WikiPage fields for backwards compatibility.
2072          *
2073          * @param string $fname Field name
2074          * @param mixed $fvalue New value
2075          */
2076         public function __set( $fname, $fvalue ) {
2077                 if ( property_exists( $this->mPage, $fname ) ) {
2078                         # wfWarn( "Access to raw $fname field of " . __CLASS__ );
2079                         $this->mPage->$fname = $fvalue;
2080                 // Note: extensions may want to toss on new fields
2081                 } elseif ( !in_array( $fname, [ 'mContext', 'mPage' ] ) ) {
2082                         $this->mPage->$fname = $fvalue;
2083                 } else {
2084                         trigger_error( 'Inaccessible property via __set(): ' . $fname, E_USER_NOTICE );
2085                 }
2086         }
2087
2088         /**
2089          * Call to WikiPage function for backwards compatibility.
2090          * @see WikiPage::checkFlags
2091          */
2092         public function checkFlags( $flags ) {
2093                 return $this->mPage->checkFlags( $flags );
2094         }
2095
2096         /**
2097          * Call to WikiPage function for backwards compatibility.
2098          * @see WikiPage::checkTouched
2099          */
2100         public function checkTouched() {
2101                 return $this->mPage->checkTouched();
2102         }
2103
2104         /**
2105          * Call to WikiPage function for backwards compatibility.
2106          * @see WikiPage::clearPreparedEdit
2107          */
2108         public function clearPreparedEdit() {
2109                 $this->mPage->clearPreparedEdit();
2110         }
2111
2112         /**
2113          * Call to WikiPage function for backwards compatibility.
2114          * @see WikiPage::doDeleteArticleReal
2115          */
2116         public function doDeleteArticleReal(
2117                 $reason, $suppress = false, $u1 = null, $u2 = null, &$error = '', User $user = null
2118         ) {
2119                 return $this->mPage->doDeleteArticleReal(
2120                         $reason, $suppress, $u1, $u2, $error, $user
2121                 );
2122         }
2123
2124         /**
2125          * Call to WikiPage function for backwards compatibility.
2126          * @see WikiPage::doDeleteUpdates
2127          */
2128         public function doDeleteUpdates( $id, Content $content = null ) {
2129                 return $this->mPage->doDeleteUpdates( $id, $content );
2130         }
2131
2132         /**
2133          * Call to WikiPage function for backwards compatibility.
2134          * @see WikiPage::doEdit
2135          */
2136         public function doEdit( $text, $summary, $flags = 0, $baseRevId = false, $user = null ) {
2137                 ContentHandler::deprecated( __METHOD__, '1.21' );
2138                 return $this->mPage->doEdit( $text, $summary, $flags, $baseRevId, $user );
2139         }
2140
2141         /**
2142          * Call to WikiPage function for backwards compatibility.
2143          * @see WikiPage::doEditContent
2144          */
2145         public function doEditContent( Content $content, $summary, $flags = 0, $baseRevId = false,
2146                 User $user = null, $serialFormat = null
2147         ) {
2148                 return $this->mPage->doEditContent( $content, $summary, $flags, $baseRevId,
2149                         $user, $serialFormat
2150                 );
2151         }
2152
2153         /**
2154          * Call to WikiPage function for backwards compatibility.
2155          * @see WikiPage::doEditUpdates
2156          */
2157         public function doEditUpdates( Revision $revision, User $user, array $options = [] ) {
2158                 return $this->mPage->doEditUpdates( $revision, $user, $options );
2159         }
2160
2161         /**
2162          * Call to WikiPage function for backwards compatibility.
2163          * @see WikiPage::doPurge
2164          */
2165         public function doPurge() {
2166                 return $this->mPage->doPurge();
2167         }
2168
2169         /**
2170          * Call to WikiPage function for backwards compatibility.
2171          * @see WikiPage::doQuickEditContent
2172          */
2173         public function doQuickEditContent(
2174                 Content $content, User $user, $comment = '', $minor = false, $serialFormat = null
2175         ) {
2176                 return $this->mPage->doQuickEditContent(
2177                         $content, $user, $comment, $minor, $serialFormat
2178                 );
2179         }
2180
2181         /**
2182          * Call to WikiPage function for backwards compatibility.
2183          * @see WikiPage::doViewUpdates
2184          */
2185         public function doViewUpdates( User $user, $oldid = 0 ) {
2186                 $this->mPage->doViewUpdates( $user, $oldid );
2187         }
2188
2189         /**
2190          * Call to WikiPage function for backwards compatibility.
2191          * @see WikiPage::exists
2192          */
2193         public function exists() {
2194                 return $this->mPage->exists();
2195         }
2196
2197         /**
2198          * Call to WikiPage function for backwards compatibility.
2199          * @see WikiPage::followRedirect
2200          */
2201         public function followRedirect() {
2202                 return $this->mPage->followRedirect();
2203         }
2204
2205         /**
2206          * Call to WikiPage function for backwards compatibility.
2207          * @see ContentHandler::getActionOverrides
2208          */
2209         public function getActionOverrides() {
2210                 return $this->mPage->getActionOverrides();
2211         }
2212
2213         /**
2214          * Call to WikiPage function for backwards compatibility.
2215          * @see WikiPage::getAutoDeleteReason
2216          */
2217         public function getAutoDeleteReason( &$hasHistory ) {
2218                 return $this->mPage->getAutoDeleteReason( $hasHistory );
2219         }
2220
2221         /**
2222          * Call to WikiPage function for backwards compatibility.
2223          * @see WikiPage::getCategories
2224          */
2225         public function getCategories() {
2226                 return $this->mPage->getCategories();
2227         }
2228
2229         /**
2230          * Call to WikiPage function for backwards compatibility.
2231          * @see WikiPage::getComment
2232          */
2233         public function getComment( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2234                 return $this->mPage->getComment( $audience, $user );
2235         }
2236
2237         /**
2238          * Call to WikiPage function for backwards compatibility.
2239          * @see WikiPage::getContentHandler
2240          */
2241         public function getContentHandler() {
2242                 return $this->mPage->getContentHandler();
2243         }
2244
2245         /**
2246          * Call to WikiPage function for backwards compatibility.
2247          * @see WikiPage::getContentModel
2248          */
2249         public function getContentModel() {
2250                 return $this->mPage->getContentModel();
2251         }
2252
2253         /**
2254          * Call to WikiPage function for backwards compatibility.
2255          * @see WikiPage::getContributors
2256          */
2257         public function getContributors() {
2258                 return $this->mPage->getContributors();
2259         }
2260
2261         /**
2262          * Call to WikiPage function for backwards compatibility.
2263          * @see WikiPage::getCreator
2264          */
2265         public function getCreator( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2266                 return $this->mPage->getCreator( $audience, $user );
2267         }
2268
2269         /**
2270          * Call to WikiPage function for backwards compatibility.
2271          * @see WikiPage::getDeletionUpdates
2272          */
2273         public function getDeletionUpdates( Content $content = null ) {
2274                 return $this->mPage->getDeletionUpdates( $content );
2275         }
2276
2277         /**
2278          * Call to WikiPage function for backwards compatibility.
2279          * @see WikiPage::getHiddenCategories
2280          */
2281         public function getHiddenCategories() {
2282                 return $this->mPage->getHiddenCategories();
2283         }
2284
2285         /**
2286          * Call to WikiPage function for backwards compatibility.
2287          * @see WikiPage::getId
2288          */
2289         public function getId() {
2290                 return $this->mPage->getId();
2291         }
2292
2293         /**
2294          * Call to WikiPage function for backwards compatibility.
2295          * @see WikiPage::getLatest
2296          */
2297         public function getLatest() {
2298                 return $this->mPage->getLatest();
2299         }
2300
2301         /**
2302          * Call to WikiPage function for backwards compatibility.
2303          * @see WikiPage::getLinksTimestamp
2304          */
2305         public function getLinksTimestamp() {
2306                 return $this->mPage->getLinksTimestamp();
2307         }
2308
2309         /**
2310          * Call to WikiPage function for backwards compatibility.
2311          * @see WikiPage::getMinorEdit
2312          */
2313         public function getMinorEdit() {
2314                 return $this->mPage->getMinorEdit();
2315         }
2316
2317         /**
2318          * Call to WikiPage function for backwards compatibility.
2319          * @see WikiPage::getOldestRevision
2320          */
2321         public function getOldestRevision() {
2322                 return $this->mPage->getOldestRevision();
2323         }
2324
2325         /**
2326          * Call to WikiPage function for backwards compatibility.
2327          * @see WikiPage::getRedirectTarget
2328          */
2329         public function getRedirectTarget() {
2330                 return $this->mPage->getRedirectTarget();
2331         }
2332
2333         /**
2334          * Call to WikiPage function for backwards compatibility.
2335          * @see WikiPage::getRedirectURL
2336          */
2337         public function getRedirectURL( $rt ) {
2338                 return $this->mPage->getRedirectURL( $rt );
2339         }
2340
2341         /**
2342          * Call to WikiPage function for backwards compatibility.
2343          * @see WikiPage::getRevision
2344          */
2345         public function getRevision() {
2346                 return $this->mPage->getRevision();
2347         }
2348
2349         /**
2350          * Call to WikiPage function for backwards compatibility.
2351          * @see WikiPage::getText
2352          */
2353         public function getText( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2354                 ContentHandler::deprecated( __METHOD__, '1.21' );
2355                 return $this->mPage->getText( $audience, $user );
2356         }
2357
2358         /**
2359          * Call to WikiPage function for backwards compatibility.
2360          * @see WikiPage::getTimestamp
2361          */
2362         public function getTimestamp() {
2363                 return $this->mPage->getTimestamp();
2364         }
2365
2366         /**
2367          * Call to WikiPage function for backwards compatibility.
2368          * @see WikiPage::getTouched
2369          */
2370         public function getTouched() {
2371                 return $this->mPage->getTouched();
2372         }
2373
2374         /**
2375          * Call to WikiPage function for backwards compatibility.
2376          * @see WikiPage::getUndoContent
2377          */
2378         public function getUndoContent( Revision $undo, Revision $undoafter = null ) {
2379                 return $this->mPage->getUndoContent( $undo, $undoafter );
2380         }
2381
2382         /**
2383          * Call to WikiPage function for backwards compatibility.
2384          * @see WikiPage::getUser
2385          */
2386         public function getUser( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2387                 return $this->mPage->getUser( $audience, $user );
2388         }
2389
2390         /**
2391          * Call to WikiPage function for backwards compatibility.
2392          * @see WikiPage::getUserText
2393          */
2394         public function getUserText( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2395                 return $this->mPage->getUserText( $audience, $user );
2396         }
2397
2398         /**
2399          * Call to WikiPage function for backwards compatibility.
2400          * @see WikiPage::hasViewableContent
2401          */
2402         public function hasViewableContent() {
2403                 return $this->mPage->hasViewableContent();
2404         }
2405
2406         /**
2407          * Call to WikiPage function for backwards compatibility.
2408          * @see WikiPage::insertOn
2409          */
2410         public function insertOn( $dbw, $pageId = null ) {
2411                 return $this->mPage->insertOn( $dbw, $pageId );
2412         }
2413
2414         /**
2415          * Call to WikiPage function for backwards compatibility.
2416          * @see WikiPage::insertProtectNullRevision
2417          */
2418         public function insertProtectNullRevision( $revCommentMsg, array $limit,
2419                 array $expiry, $cascade, $reason, $user = null
2420         ) {
2421                 return $this->mPage->insertProtectNullRevision( $revCommentMsg, $limit,
2422                         $expiry, $cascade, $reason, $user
2423                 );
2424         }
2425
2426         /**
2427          * Call to WikiPage function for backwards compatibility.
2428          * @see WikiPage::insertRedirect
2429          */
2430         public function insertRedirect() {
2431                 return $this->mPage->insertRedirect();
2432         }
2433
2434         /**
2435          * Call to WikiPage function for backwards compatibility.
2436          * @see WikiPage::insertRedirectEntry
2437          */
2438         public function insertRedirectEntry( Title $rt, $oldLatest = null ) {
2439                 return $this->mPage->insertRedirectEntry( $rt, $oldLatest );
2440         }
2441
2442         /**
2443          * Call to WikiPage function for backwards compatibility.
2444          * @see WikiPage::isCountable
2445          */
2446         public function isCountable( $editInfo = false ) {
2447                 return $this->mPage->isCountable( $editInfo );
2448         }
2449
2450         /**
2451          * Call to WikiPage function for backwards compatibility.
2452          * @see WikiPage::isRedirect
2453          */
2454         public function isRedirect() {
2455                 return $this->mPage->isRedirect();
2456         }
2457
2458         /**
2459          * Call to WikiPage function for backwards compatibility.
2460          * @see WikiPage::loadFromRow
2461          */
2462         public function loadFromRow( $data, $from ) {
2463                 return $this->mPage->loadFromRow( $data, $from );
2464         }
2465
2466         /**
2467          * Call to WikiPage function for backwards compatibility.
2468          * @see WikiPage::loadPageData
2469          */
2470         public function loadPageData( $from = 'fromdb' ) {
2471                 $this->mPage->loadPageData( $from );
2472         }
2473
2474         /**
2475          * Call to WikiPage function for backwards compatibility.
2476          * @see WikiPage::lockAndGetLatest
2477          */
2478         public function lockAndGetLatest() {
2479                 return $this->mPage->lockAndGetLatest();
2480         }
2481
2482         /**
2483          * Call to WikiPage function for backwards compatibility.
2484          * @see WikiPage::makeParserOptions
2485          */
2486         public function makeParserOptions( $context ) {
2487                 return $this->mPage->makeParserOptions( $context );
2488         }
2489
2490         /**
2491          * Call to WikiPage function for backwards compatibility.
2492          * @see WikiPage::pageDataFromId
2493          */
2494         public function pageDataFromId( $dbr, $id, $options = [] ) {
2495                 return $this->mPage->pageDataFromId( $dbr, $id, $options );
2496         }
2497
2498         /**
2499          * Call to WikiPage function for backwards compatibility.
2500          * @see WikiPage::pageDataFromTitle
2501          */
2502         public function pageDataFromTitle( $dbr, $title, $options = [] ) {
2503                 return $this->mPage->pageDataFromTitle( $dbr, $title, $options );
2504         }
2505
2506         /**
2507          * Call to WikiPage function for backwards compatibility.
2508          * @see WikiPage::prepareContentForEdit
2509          */
2510         public function prepareContentForEdit(
2511                 Content $content, $revision = null, User $user = null,
2512                 $serialFormat = null, $useCache = true
2513         ) {
2514                 return $this->mPage->prepareContentForEdit(
2515                         $content, $revision, $user,
2516                         $serialFormat, $useCache
2517                 );
2518         }
2519
2520         /**
2521          * Call to WikiPage function for backwards compatibility.
2522          * @see WikiPage::prepareTextForEdit
2523          */
2524         public function prepareTextForEdit( $text, $revid = null, User $user = null ) {
2525                 return $this->mPage->prepareTextForEdit( $text, $revid, $user );
2526         }
2527
2528         /**
2529          * Call to WikiPage function for backwards compatibility.
2530          * @see WikiPage::protectDescription
2531          */
2532         public function protectDescription( array $limit, array $expiry ) {
2533                 return $this->mPage->protectDescription( $limit, $expiry );
2534         }
2535
2536         /**
2537          * Call to WikiPage function for backwards compatibility.
2538          * @see WikiPage::protectDescriptionLog
2539          */
2540         public function protectDescriptionLog( array $limit, array $expiry ) {
2541                 return $this->mPage->protectDescriptionLog( $limit, $expiry );
2542         }
2543
2544         /**
2545          * Call to WikiPage function for backwards compatibility.
2546          * @see WikiPage::replaceSectionAtRev
2547          */
2548         public function replaceSectionAtRev( $sectionId, Content $sectionContent,
2549                 $sectionTitle = '', $baseRevId = null
2550         ) {
2551                 return $this->mPage->replaceSectionAtRev( $sectionId, $sectionContent,
2552                         $sectionTitle, $baseRevId
2553                 );
2554         }
2555
2556         /**
2557          * Call to WikiPage function for backwards compatibility.
2558          * @see WikiPage::replaceSectionContent
2559          */
2560         public function replaceSectionContent(
2561                 $sectionId, Content $sectionContent, $sectionTitle = '', $edittime = null
2562         ) {
2563                 return $this->mPage->replaceSectionContent(
2564                         $sectionId, $sectionContent, $sectionTitle, $edittime
2565                 );
2566         }
2567
2568         /**
2569          * Call to WikiPage function for backwards compatibility.
2570          * @see WikiPage::setTimestamp
2571          */
2572         public function setTimestamp( $ts ) {
2573                 return $this->mPage->setTimestamp( $ts );
2574         }
2575
2576         /**
2577          * Call to WikiPage function for backwards compatibility.
2578          * @see WikiPage::shouldCheckParserCache
2579          */
2580         public function shouldCheckParserCache( ParserOptions $parserOptions, $oldId ) {
2581                 return $this->mPage->shouldCheckParserCache( $parserOptions, $oldId );
2582         }
2583
2584         /**
2585          * Call to WikiPage function for backwards compatibility.
2586          * @see WikiPage::supportsSections
2587          */
2588         public function supportsSections() {
2589                 return $this->mPage->supportsSections();
2590         }
2591
2592         /**
2593          * Call to WikiPage function for backwards compatibility.
2594          * @see WikiPage::triggerOpportunisticLinksUpdate
2595          */
2596         public function triggerOpportunisticLinksUpdate( ParserOutput $parserOutput ) {
2597                 return $this->mPage->triggerOpportunisticLinksUpdate( $parserOutput );
2598         }
2599
2600         /**
2601          * Call to WikiPage function for backwards compatibility.
2602          * @see WikiPage::updateCategoryCounts
2603          */
2604         public function updateCategoryCounts( array $added, array $deleted, $id = 0 ) {
2605                 return $this->mPage->updateCategoryCounts( $added, $deleted, $id );
2606         }
2607
2608         /**
2609          * Call to WikiPage function for backwards compatibility.
2610          * @see WikiPage::updateIfNewerOn
2611          */
2612         public function updateIfNewerOn( $dbw, $revision ) {
2613                 return $this->mPage->updateIfNewerOn( $dbw, $revision );
2614         }
2615
2616         /**
2617          * Call to WikiPage function for backwards compatibility.
2618          * @see WikiPage::updateRedirectOn
2619          */
2620         public function updateRedirectOn( $dbw, $redirectTitle, $lastRevIsRedirect = null ) {
2621                 return $this->mPage->updateRedirectOn( $dbw, $redirectTitle, $lastRevIsRedirect = null );
2622         }
2623
2624         /**
2625          * Call to WikiPage function for backwards compatibility.
2626          * @see WikiPage::updateRevisionOn
2627          */
2628         public function updateRevisionOn( $dbw, $revision, $lastRevision = null,
2629                 $lastRevIsRedirect = null
2630         ) {
2631                 return $this->mPage->updateRevisionOn( $dbw, $revision, $lastRevision,
2632                         $lastRevIsRedirect
2633                 );
2634         }
2635
2636         /**
2637          * @param array $limit
2638          * @param array $expiry
2639          * @param bool $cascade
2640          * @param string $reason
2641          * @param User $user
2642          * @return Status
2643          */
2644         public function doUpdateRestrictions( array $limit, array $expiry, &$cascade,
2645                 $reason, User $user
2646         ) {
2647                 return $this->mPage->doUpdateRestrictions( $limit, $expiry, $cascade, $reason, $user );
2648         }
2649
2650         /**
2651          * @param array $limit
2652          * @param string $reason
2653          * @param int $cascade
2654          * @param array $expiry
2655          * @return bool
2656          */
2657         public function updateRestrictions( $limit = [], $reason = '',
2658                 &$cascade = 0, $expiry = []
2659         ) {
2660                 return $this->mPage->doUpdateRestrictions(
2661                         $limit,
2662                         $expiry,
2663                         $cascade,
2664                         $reason,
2665                         $this->getContext()->getUser()
2666                 );
2667         }
2668
2669         /**
2670          * @param string $reason
2671          * @param bool $suppress
2672          * @param int $u1 Unused
2673          * @param bool $u2 Unused
2674          * @param string $error
2675          * @return bool
2676          */
2677         public function doDeleteArticle(
2678                 $reason, $suppress = false, $u1 = null, $u2 = null, &$error = ''
2679         ) {
2680                 return $this->mPage->doDeleteArticle( $reason, $suppress, $u1, $u2, $error );
2681         }
2682
2683         /**
2684          * @param string $fromP
2685          * @param string $summary
2686          * @param string $token
2687          * @param bool $bot
2688          * @param array $resultDetails
2689          * @param User|null $user
2690          * @return array
2691          */
2692         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails, User $user = null ) {
2693                 $user = is_null( $user ) ? $this->getContext()->getUser() : $user;
2694                 return $this->mPage->doRollback( $fromP, $summary, $token, $bot, $resultDetails, $user );
2695         }
2696
2697         /**
2698          * @param string $fromP
2699          * @param string $summary
2700          * @param bool $bot
2701          * @param array $resultDetails
2702          * @param User|null $guser
2703          * @return array
2704          */
2705         public function commitRollback( $fromP, $summary, $bot, &$resultDetails, User $guser = null ) {
2706                 $guser = is_null( $guser ) ? $this->getContext()->getUser() : $guser;
2707                 return $this->mPage->commitRollback( $fromP, $summary, $bot, $resultDetails, $guser );
2708         }
2709
2710         /**
2711          * @param bool $hasHistory
2712          * @return mixed
2713          */
2714         public function generateReason( &$hasHistory ) {
2715                 $title = $this->mPage->getTitle();
2716                 $handler = ContentHandler::getForTitle( $title );
2717                 return $handler->getAutoDeleteReason( $title, $hasHistory );
2718         }
2719
2720         /**
2721          * @return array
2722          *
2723          * @deprecated since 1.24, use WikiPage::selectFields() instead
2724          */
2725         public static function selectFields() {
2726                 wfDeprecated( __METHOD__, '1.24' );
2727                 return WikiPage::selectFields();
2728         }
2729
2730         /**
2731          * @param Title $title
2732          *
2733          * @deprecated since 1.24, use WikiPage::onArticleCreate() instead
2734          */
2735         public static function onArticleCreate( $title ) {
2736                 wfDeprecated( __METHOD__, '1.24' );
2737                 WikiPage::onArticleCreate( $title );
2738         }
2739
2740         /**
2741          * @param Title $title
2742          *
2743          * @deprecated since 1.24, use WikiPage::onArticleDelete() instead
2744          */
2745         public static function onArticleDelete( $title ) {
2746                 wfDeprecated( __METHOD__, '1.24' );
2747                 WikiPage::onArticleDelete( $title );
2748         }
2749
2750         /**
2751          * @param Title $title
2752          *
2753          * @deprecated since 1.24, use WikiPage::onArticleEdit() instead
2754          */
2755         public static function onArticleEdit( $title ) {
2756                 wfDeprecated( __METHOD__, '1.24' );
2757                 WikiPage::onArticleEdit( $title );
2758         }
2759
2760         /**
2761          * @param string $oldtext
2762          * @param string $newtext
2763          * @param int $flags
2764          * @return string
2765          * @deprecated since 1.21, use ContentHandler::getAutosummary() instead
2766          */
2767         public static function getAutosummary( $oldtext, $newtext, $flags ) {
2768                 return WikiPage::getAutosummary( $oldtext, $newtext, $flags );
2769         }
2770         // ******
2771 }