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