includes/page/Article.php

   1 <?php
   2 /**
   3  * User interface for page actions.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22 use MediaWiki\MediaWikiServices;
  23
  24 /**
  25  * Class for viewing MediaWiki article and history.
  26  *
  27  * This maintains WikiPage functions for backwards compatibility.
  28  *
  29  * @todo Move and rewrite code to an Action class
  30  *
  31  * See design.txt for an overview.
  32  * Note: edit user interface and cache support functions have been
  33  * moved to separate EditPage and HTMLFileCache classes.
  34  */
  35 class Article implements Page {
  36         /**
  37          * @var IContextSource|null The context this Article is executed in.
  38          * If null, REquestContext::getMain() is used.
  39          */
  40         protected $mContext;
  41
  42         /** @var WikiPage The WikiPage object of this instance */
  43         protected $mPage;
  44
  45         /**
  46          * @var ParserOptions|null ParserOptions object for $wgUser articles.
  47          * Initialized by getParserOptions by calling $this->mPage->makeParserOptions().
  48          */
  49         public $mParserOptions;
  50
  51         /**
  52          * @var string|null Text of the revision we are working on
  53          * @todo BC cruft
  54          */
  55         public $mContent;
  56
  57         /**
  58          * @var Content|null Content of the revision we are working on.
  59          * Initialized by fetchContentObject().
  60          * @since 1.21
  61          */
  62         public $mContentObject;
  63
  64         /** @var bool Is the content ($mContent) already loaded? */
  65         public $mContentLoaded = false;
  66
  67         /** @var int|null The oldid of the article that is to be shown, 0 for the current revision */
  68         public $mOldId;
  69
  70         /** @var Title|null Title from which we were redirected here, if any. */
  71         public $mRedirectedFrom = null;
  72
  73         /** @var string|bool URL to redirect to or false if none */
  74         public $mRedirectUrl = false;
  75
  76         /** @var int Revision ID of revision we are working on */
  77         public $mRevIdFetched = 0;
  78
  79         /**
  80          * @var Revision|null Revision we are working on. Initialized by getOldIDFromRequest()
  81          * or fetchContentObject().
  82          */
  83         public $mRevision = null;
  84
  85         /**
  86          * @var ParserOutput|null|false The ParserOutput generated for viewing the page,
  87          * initialized by view(). If no ParserOutput could be generated, this is set to false.
  88          */
  89         public $mParserOutput;
  90
  91         /**
  92          * @var bool Whether render() was called. With the way subclasses work
  93          * here, there doesn't seem to be any other way to stop calling
  94          * OutputPage::enableSectionEditLinks() and still have it work as it did before.
  95          */
  96         private $disableSectionEditForRender = false;
  97
  98         /**
  99          * Constructor and clear the article
 100          * @param Title $title Reference to a Title object.
 101          * @param int|null $oldId Revision ID, null to fetch from request, zero for current
 102          */
 103         public function __construct( Title $title, $oldId = null ) {
 104                 $this->mOldId = $oldId;
 105                 $this->mPage = $this->newPage( $title );
 106         }
 107
 108         /**
 109          * @param Title $title
 110          * @return WikiPage
 111          */
 112         protected function newPage( Title $title ) {
 113                 return new WikiPage( $title );
 114         }
 115
 116         /**
 117          * Constructor from a page id
 118          * @param int $id Article ID to load
 119          * @return Article|null
 120          */
 121         public static function newFromID( $id ) {
 122                 $t = Title::newFromID( $id );
 123                 return $t == null ? null : new static( $t );
 124         }
 125
 126         /**
 127          * Create an Article object of the appropriate class for the given page.
 128          *
 129          * @param Title $title
 130          * @param IContextSource $context
 131          * @return Article
 132          */
 133         public static function newFromTitle( $title, IContextSource $context ) {
 134                 if ( NS_MEDIA == $title->getNamespace() ) {
 135                         // FIXME: where should this go?
 136                         $title = Title::makeTitle( NS_FILE, $title->getDBkey() );
 137                 }
 138
 139                 $page = null;
 140                 Hooks::run( 'ArticleFromTitle', [ &$title, &$page, $context ] );
 141                 if ( !$page ) {
 142                         switch ( $title->getNamespace() ) {
 143                                 case NS_FILE:
 144                                         $page = new ImagePage( $title );
 145                                         break;
 146                                 case NS_CATEGORY:
 147                                         $page = new CategoryPage( $title );
 148                                         break;
 149                                 default:
 150                                         $page = new Article( $title );
 151                         }
 152                 }
 153                 $page->setContext( $context );
 154
 155                 return $page;
 156         }
 157
 158         /**
 159          * Create an Article object of the appropriate class for the given page.
 160          *
 161          * @param WikiPage $page
 162          * @param IContextSource $context
 163          * @return Article
 164          */
 165         public static function newFromWikiPage( WikiPage $page, IContextSource $context ) {
 166                 $article = self::newFromTitle( $page->getTitle(), $context );
 167                 $article->mPage = $page; // override to keep process cached vars
 168                 return $article;
 169         }
 170
 171         /**
 172          * Get the page this view was redirected from
 173          * @return Title|null
 174          * @since 1.28
 175          */
 176         public function getRedirectedFrom() {
 177                 return $this->mRedirectedFrom;
 178         }
 179
 180         /**
 181          * Tell the page view functions that this view was redirected
 182          * from another page on the wiki.
 183          * @param Title $from
 184          */
 185         public function setRedirectedFrom( Title $from ) {
 186                 $this->mRedirectedFrom = $from;
 187         }
 188
 189         /**
 190          * Get the title object of the article
 191          *
 192          * @return Title Title object of this page
 193          */
 194         public function getTitle() {
 195                 return $this->mPage->getTitle();
 196         }
 197
 198         /**
 199          * Get the WikiPage object of this instance
 200          *
 201          * @since 1.19
 202          * @return WikiPage
 203          */
 204         public function getPage() {
 205                 return $this->mPage;
 206         }
 207
 208         /**
 209          * Clear the object
 210          */
 211         public function clear() {
 212                 $this->mContentLoaded = false;
 213
 214                 $this->mRedirectedFrom = null; # Title object if set
 215                 $this->mRevIdFetched = 0;
 216                 $this->mRedirectUrl = false;
 217
 218                 $this->mPage->clear();
 219         }
 220
 221         /**
 222          * Returns a Content object representing the pages effective display content,
 223          * not necessarily the revision's content!
 224          *
 225          * Note that getContent does not follow redirects anymore.
 226          * If you need to fetch redirectable content easily, try
 227          * the shortcut in WikiPage::getRedirectTarget()
 228          *
 229          * This function has side effects! Do not use this function if you
 230          * only want the real revision text if any.
 231          *
 232          * @return Content Return the content of this revision
 233          *
 234          * @since 1.21
 235          */
 236         protected function getContentObject() {
 237                 if ( $this->mPage->getId() === 0 ) {
 238                         # If this is a MediaWiki:x message, then load the messages
 239                         # and return the message value for x.
 240                         if ( $this->getTitle()->getNamespace() == NS_MEDIAWIKI ) {
 241                                 $text = $this->getTitle()->getDefaultMessageText();
 242                                 if ( $text === false ) {
 243                                         $text = '';
 244                                 }
 245
 246                                 $content = ContentHandler::makeContent( $text, $this->getTitle() );
 247                         } else {
 248                                 $message = $this->getContext()->getUser()->isLoggedIn() ? 'noarticletext' : 'noarticletextanon';
 249                                 $content = new MessageContent( $message, null, 'parsemag' );
 250                         }
 251                 } else {
 252                         $this->fetchContentObject();
 253                         $content = $this->mContentObject;
 254                 }
 255
 256                 return $content;
 257         }
 258
 259         /**
 260          * @return int The oldid of the article that is to be shown, 0 for the current revision
 261          */
 262         public function getOldID() {
 263                 if ( is_null( $this->mOldId ) ) {
 264                         $this->mOldId = $this->getOldIDFromRequest();
 265                 }
 266
 267                 return $this->mOldId;
 268         }
 269
 270         /**
 271          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 272          *
 273          * @return int The old id for the request
 274          */
 275         public function getOldIDFromRequest() {
 276                 $this->mRedirectUrl = false;
 277
 278                 $request = $this->getContext()->getRequest();
 279                 $oldid = $request->getIntOrNull( 'oldid' );
 280
 281                 if ( $oldid === null ) {
 282                         return 0;
 283                 }
 284
 285                 if ( $oldid !== 0 ) {
 286                         # Load the given revision and check whether the page is another one.
 287                         # In that case, update this instance to reflect the change.
 288                         if ( $oldid === $this->mPage->getLatest() ) {
 289                                 $this->mRevision = $this->mPage->getRevision();
 290                         } else {
 291                                 $this->mRevision = Revision::newFromId( $oldid );
 292                                 if ( $this->mRevision !== null ) {
 293                                         // Revision title doesn't match the page title given?
 294                                         if ( $this->mPage->getId() != $this->mRevision->getPage() ) {
 295                                                 $function = get_class( $this->mPage ). '::newFromID';
 296                                                 $this->mPage = $function( $this->mRevision->getPage() );
 297                                         }
 298                                 }
 299                         }
 300                 }
 301
 302                 if ( $request->getVal( 'direction' ) == 'next' ) {
 303                         $nextid = $this->getTitle()->getNextRevisionID( $oldid );
 304                         if ( $nextid ) {
 305                                 $oldid = $nextid;
 306                                 $this->mRevision = null;
 307                         } else {
 308                                 $this->mRedirectUrl = $this->getTitle()->getFullURL( 'redirect=no' );
 309                         }
 310                 } elseif ( $request->getVal( 'direction' ) == 'prev' ) {
 311                         $previd = $this->getTitle()->getPreviousRevisionID( $oldid );
 312                         if ( $previd ) {
 313                                 $oldid = $previd;
 314                                 $this->mRevision = null;
 315                         }
 316                 }
 317
 318                 return $oldid;
 319         }
 320
 321         /**
 322          * Get text content object
 323          * Does *NOT* follow redirects.
 324          * @todo When is this null?
 325          *
 326          * @note Code that wants to retrieve page content from the database should
 327          * use WikiPage::getContent().
 328          *
 329          * @return Content|null|bool
 330          *
 331          * @since 1.21
 332          */
 333         protected function fetchContentObject() {
 334                 if ( $this->mContentLoaded ) {
 335                         return $this->mContentObject;
 336                 }
 337
 338                 $this->mContentLoaded = true;
 339                 $this->mContent = null;
 340
 341                 $oldid = $this->getOldID();
 342
 343                 # Pre-fill content with error message so that if something
 344                 # fails we'll have something telling us what we intended.
 345                 // XXX: this isn't page content but a UI message. horrible.
 346                 $this->mContentObject = new MessageContent( 'missing-revision', [ $oldid ] );
 347
 348                 if ( $oldid ) {
 349                         # $this->mRevision might already be fetched by getOldIDFromRequest()
 350                         if ( !$this->mRevision ) {
 351                                 $this->mRevision = Revision::newFromId( $oldid );
 352                                 if ( !$this->mRevision ) {
 353                                         wfDebug( __METHOD__ . " failed to retrieve specified revision, id $oldid\n" );
 354                                         return false;
 355                                 }
 356                         }
 357                 } else {
 358                         $oldid = $this->mPage->getLatest();
 359                         if ( !$oldid ) {
 360                                 wfDebug( __METHOD__ . " failed to find page data for title " .
 361                                         $this->getTitle()->getPrefixedText() . "\n" );
 362                                 return false;
 363                         }
 364
 365                         # Update error message with correct oldid
 366                         $this->mContentObject = new MessageContent( 'missing-revision', [ $oldid ] );
 367
 368                         $this->mRevision = $this->mPage->getRevision();
 369
 370                         if ( !$this->mRevision ) {
 371                                 wfDebug( __METHOD__ . " failed to retrieve current page, rev_id $oldid\n" );
 372                                 return false;
 373                         }
 374                 }
 375
 376                 // @todo FIXME: Horrible, horrible! This content-loading interface just plain sucks.
 377                 // We should instead work with the Revision object when we need it...
 378                 // Loads if user is allowed
 379                 $content = $this->mRevision->getContent(
 380                         Revision::FOR_THIS_USER,
 381                         $this->getContext()->getUser()
 382                 );
 383
 384                 if ( !$content ) {
 385                         wfDebug( __METHOD__ . " failed to retrieve content of revision " .
 386                                 $this->mRevision->getId() . "\n" );
 387                         return false;
 388                 }
 389
 390                 $this->mContentObject = $content;
 391                 $this->mRevIdFetched = $this->mRevision->getId();
 392
 393                 // Avoid PHP 7.1 warning of passing $this by reference
 394                 $articlePage = $this;
 395
 396                 Hooks::run(
 397                         'ArticleAfterFetchContentObject',
 398                         [ &$articlePage, &$this->mContentObject ]
 399                 );
 400
 401                 return $this->mContentObject;
 402         }
 403
 404         /**
 405          * Returns true if the currently-referenced revision is the current edit
 406          * to this page (and it exists).
 407          * @return bool
 408          */
 409         public function isCurrent() {
 410                 # If no oldid, this is the current version.
 411                 if ( $this->getOldID() == 0 ) {
 412                         return true;
 413                 }
 414
 415                 return $this->mPage->exists() && $this->mRevision && $this->mRevision->isCurrent();
 416         }
 417
 418         /**
 419          * Get the fetched Revision object depending on request parameters or null
 420          * on failure.
 421          *
 422          * @since 1.19
 423          * @return Revision|null
 424          */
 425         public function getRevisionFetched() {
 426                 $this->fetchContentObject();
 427
 428                 return $this->mRevision;
 429         }
 430
 431         /**
 432          * Use this to fetch the rev ID used on page views
 433          *
 434          * @return int Revision ID of last article revision
 435          */
 436         public function getRevIdFetched() {
 437                 if ( $this->mRevIdFetched ) {
 438                         return $this->mRevIdFetched;
 439                 } else {
 440                         return $this->mPage->getLatest();
 441                 }
 442         }
 443
 444         /**
 445          * This is the default action of the index.php entry point: just view the
 446          * page of the given title.
 447          */
 448         public function view() {
 449                 global $wgUseFileCache, $wgDebugToolbar;
 450
 451                 # Get variables from query string
 452                 # As side effect this will load the revision and update the title
 453                 # in a revision ID is passed in the request, so this should remain
 454                 # the first call of this method even if $oldid is used way below.
 455                 $oldid = $this->getOldID();
 456
 457                 $user = $this->getContext()->getUser();
 458                 # Another whitelist check in case getOldID() is altering the title
 459                 $permErrors = $this->getTitle()->getUserPermissionsErrors( 'read', $user );
 460                 if ( count( $permErrors ) ) {
 461                         wfDebug( __METHOD__ . ": denied on secondary read check\n" );
 462                         throw new PermissionsError( 'read', $permErrors );
 463                 }
 464
 465                 $outputPage = $this->getContext()->getOutput();
 466                 # getOldID() may as well want us to redirect somewhere else
 467                 if ( $this->mRedirectUrl ) {
 468                         $outputPage->redirect( $this->mRedirectUrl );
 469                         wfDebug( __METHOD__ . ": redirecting due to oldid\n" );
 470
 471                         return;
 472                 }
 473
 474                 # If we got diff in the query, we want to see a diff page instead of the article.
 475                 if ( $this->getContext()->getRequest()->getCheck( 'diff' ) ) {
 476                         wfDebug( __METHOD__ . ": showing diff page\n" );
 477                         $this->showDiffPage();
 478
 479                         return;
 480                 }
 481
 482                 # Set page title (may be overridden by DISPLAYTITLE)
 483                 $outputPage->setPageTitle( $this->getTitle()->getPrefixedText() );
 484
 485                 $outputPage->setArticleFlag( true );
 486                 # Allow frames by default
 487                 $outputPage->allowClickjacking();
 488
 489                 $parserCache = MediaWikiServices::getInstance()->getParserCache();
 490
 491                 $parserOptions = $this->getParserOptions();
 492                 $poOptions = [];
 493                 # Render printable version, use printable version cache
 494                 if ( $outputPage->isPrintable() ) {
 495                         $parserOptions->setIsPrintable( true );
 496                         $poOptions['enableSectionEditLinks'] = false;
 497                 } elseif ( $this->disableSectionEditForRender
 498                         || !$this->isCurrent() || !$this->getTitle()->quickUserCan( 'edit', $user )
 499                 ) {
 500                         $poOptions['enableSectionEditLinks'] = false;
 501                 }
 502
 503                 # Try client and file cache
 504                 if ( !$wgDebugToolbar && $oldid === 0 && $this->mPage->checkTouched() ) {
 505                         # Try to stream the output from file cache
 506                         if ( $wgUseFileCache && $this->tryFileCache() ) {
 507                                 wfDebug( __METHOD__ . ": done file cache\n" );
 508                                 # tell wgOut that output is taken care of
 509                                 $outputPage->disable();
 510                                 $this->mPage->doViewUpdates( $user, $oldid );
 511
 512                                 return;
 513                         }
 514                 }
 515
 516                 # Should the parser cache be used?
 517                 $useParserCache = $this->mPage->shouldCheckParserCache( $parserOptions, $oldid );
 518                 wfDebug( 'Article::view using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
 519                 if ( $user->getStubThreshold() ) {
 520                         MediaWikiServices::getInstance()->getStatsdDataFactory()->increment( 'pcache_miss_stub' );
 521                 }
 522
 523                 $this->showRedirectedFromHeader();
 524                 $this->showNamespaceHeader();
 525
 526                 # Iterate through the possible ways of constructing the output text.
 527                 # Keep going until $outputDone is set, or we run out of things to do.
 528                 $pass = 0;
 529                 $outputDone = false;
 530                 $this->mParserOutput = false;
 531
 532                 while ( !$outputDone && ++$pass ) {
 533                         switch ( $pass ) {
 534                                 case 1:
 535                                         // Avoid PHP 7.1 warning of passing $this by reference
 536                                         $articlePage = $this;
 537                                         Hooks::run( 'ArticleViewHeader', [ &$articlePage, &$outputDone, &$useParserCache ] );
 538                                         break;
 539                                 case 2:
 540                                         # Early abort if the page doesn't exist
 541                                         if ( !$this->mPage->exists() ) {
 542                                                 wfDebug( __METHOD__ . ": showing missing article\n" );
 543                                                 $this->showMissingArticle();
 544                                                 $this->mPage->doViewUpdates( $user );
 545                                                 return;
 546                                         }
 547
 548                                         # Try the parser cache
 549                                         if ( $useParserCache ) {
 550                                                 $this->mParserOutput = $parserCache->get( $this->mPage, $parserOptions );
 551
 552                                                 if ( $this->mParserOutput !== false ) {
 553                                                         if ( $oldid ) {
 554                                                                 wfDebug( __METHOD__ . ": showing parser cache contents for current rev permalink\n" );
 555                                                                 $this->setOldSubtitle( $oldid );
 556                                                         } else {
 557                                                                 wfDebug( __METHOD__ . ": showing parser cache contents\n" );
 558                                                         }
 559                                                         $outputPage->addParserOutput( $this->mParserOutput, $poOptions );
 560                                                         # Ensure that UI elements requiring revision ID have
 561                                                         # the correct version information.
 562                                                         $outputPage->setRevisionId( $this->mPage->getLatest() );
 563                                                         # Preload timestamp to avoid a DB hit
 564                                                         $cachedTimestamp = $this->mParserOutput->getTimestamp();
 565                                                         if ( $cachedTimestamp !== null ) {
 566                                                                 $outputPage->setRevisionTimestamp( $cachedTimestamp );
 567                                                                 $this->mPage->setTimestamp( $cachedTimestamp );
 568                                                         }
 569                                                         $outputDone = true;
 570                                                 }
 571                                         }
 572                                         break;
 573                                 case 3:
 574                                         # This will set $this->mRevision if needed
 575                                         $this->fetchContentObject();
 576
 577                                         # Are we looking at an old revision
 578                                         if ( $oldid && $this->mRevision ) {
 579                                                 $this->setOldSubtitle( $oldid );
 580
 581                                                 if ( !$this->showDeletedRevisionHeader() ) {
 582                                                         wfDebug( __METHOD__ . ": cannot view deleted revision\n" );
 583                                                         return;
 584                                                 }
 585                                         }
 586
 587                                         # Ensure that UI elements requiring revision ID have
 588                                         # the correct version information.
 589                                         $outputPage->setRevisionId( $this->getRevIdFetched() );
 590                                         # Preload timestamp to avoid a DB hit
 591                                         $outputPage->setRevisionTimestamp( $this->mPage->getTimestamp() );
 592
 593                                         # Pages containing custom CSS or JavaScript get special treatment
 594                                         if ( $this->getTitle()->isSiteConfigPage() || $this->getTitle()->isUserConfigPage() ) {
 595                                                 $dir = $this->getContext()->getLanguage()->getDir();
 596                                                 $lang = $this->getContext()->getLanguage()->getHtmlCode();
 597
 598                                                 $outputPage->wrapWikiMsg(
 599                                                         "<div id='mw-clearyourcache' lang='$lang' dir='$dir' class='mw-content-$dir'>\n$1\n</div>",
 600                                                         'clearyourcache'
 601                                                 );
 602                                         } elseif ( !Hooks::run( 'ArticleContentViewCustom',
 603                                                 [ $this->fetchContentObject(), $this->getTitle(), $outputPage ] )
 604                                         ) {
 605                                                 # Allow extensions do their own custom view for certain pages
 606                                                 $outputDone = true;
 607                                         }
 608                                         break;
 609                                 case 4:
 610                                         # Run the parse, protected by a pool counter
 611                                         wfDebug( __METHOD__ . ": doing uncached parse\n" );
 612
 613                                         $content = $this->getContentObject();
 614                                         $poolArticleView = new PoolWorkArticleView( $this->getPage(), $parserOptions,
 615                                                 $this->getRevIdFetched(), $useParserCache, $content );
 616
 617                                         if ( !$poolArticleView->execute() ) {
 618                                                 $error = $poolArticleView->getError();
 619                                                 if ( $error ) {
 620                                                         $outputPage->clearHTML(); // for release() errors
 621                                                         $outputPage->enableClientCache( false );
 622                                                         $outputPage->setRobotPolicy( 'noindex,nofollow' );
 623
 624                                                         $errortext = $error->getWikiText( false, 'view-pool-error' );
 625                                                         $outputPage->addWikiText( Html::errorBox( $errortext ) );
 626                                                 }
 627                                                 # Connection or timeout error
 628                                                 return;
 629                                         }
 630
 631                                         $this->mParserOutput = $poolArticleView->getParserOutput();
 632                                         $outputPage->addParserOutput( $this->mParserOutput, $poOptions );
 633                                         if ( $content->getRedirectTarget() ) {
 634                                                 $outputPage->addSubtitle( "<span id=\"redirectsub\">" .
 635                                                         $this->getContext()->msg( 'redirectpagesub' )->parse() . "</span>" );
 636                                         }
 637
 638                                         # Don't cache a dirty ParserOutput object
 639                                         if ( $poolArticleView->getIsDirty() ) {
 640                                                 $outputPage->setCdnMaxage( 0 );
 641                                                 $outputPage->addHTML( "<!-- parser cache is expired, " .
 642                                                         "sending anyway due to pool overload-->\n" );
 643                                         }
 644
 645                                         $outputDone = true;
 646                                         break;
 647                                 # Should be unreachable, but just in case...
 648                                 default:
 649                                         break 2;
 650                         }
 651                 }
 652
 653                 # Get the ParserOutput actually *displayed* here.
 654                 # Note that $this->mParserOutput is the *current*/oldid version output.
 655                 $pOutput = ( $outputDone instanceof ParserOutput )
 656                         ? $outputDone // object fetched by hook
 657                         : $this->mParserOutput ?: null; // ParserOutput or null, avoid false
 658
 659                 # Adjust title for main page & pages with displaytitle
 660                 if ( $pOutput ) {
 661                         $this->adjustDisplayTitle( $pOutput );
 662                 }
 663
 664                 # For the main page, overwrite the <title> element with the con-
 665                 # tents of 'pagetitle-view-mainpage' instead of the default (if
 666                 # that's not empty).
 667                 # This message always exists because it is in the i18n files
 668                 if ( $this->getTitle()->isMainPage() ) {
 669                         $msg = wfMessage( 'pagetitle-view-mainpage' )->inContentLanguage();
 670                         if ( !$msg->isDisabled() ) {
 671                                 $outputPage->setHTMLTitle( $msg->title( $this->getTitle() )->text() );
 672                         }
 673                 }
 674
 675                 # Use adaptive TTLs for CDN so delayed/failed purges are noticed less often.
 676                 # This could use getTouched(), but that could be scary for major template edits.
 677                 $outputPage->adaptCdnTTL( $this->mPage->getTimestamp(), IExpiringStore::TTL_DAY );
 678
 679                 # Check for any __NOINDEX__ tags on the page using $pOutput
 680                 $policy = $this->getRobotPolicy( 'view', $pOutput );
 681                 $outputPage->setIndexPolicy( $policy['index'] );
 682                 $outputPage->setFollowPolicy( $policy['follow'] );
 683
 684                 $this->showViewFooter();
 685                 $this->mPage->doViewUpdates( $user, $oldid );
 686
 687                 # Load the postEdit module if the user just saved this revision
 688                 # See also EditPage::setPostEditCookie
 689                 $request = $this->getContext()->getRequest();
 690                 $cookieKey = EditPage::POST_EDIT_COOKIE_KEY_PREFIX . $this->getRevIdFetched();
 691                 $postEdit = $request->getCookie( $cookieKey );
 692                 if ( $postEdit ) {
 693                         # Clear the cookie. This also prevents caching of the response.
 694                         $request->response()->clearCookie( $cookieKey );
 695                         $outputPage->addJsConfigVars( 'wgPostEdit', $postEdit );
 696                         $outputPage->addModules( 'mediawiki.action.view.postEdit' );
 697                 }
 698         }
 699
 700         /**
 701          * Adjust title for pages with displaytitle, -{T|}- or language conversion
 702          * @param ParserOutput $pOutput
 703          */
 704         public function adjustDisplayTitle( ParserOutput $pOutput ) {
 705                 # Adjust the title if it was set by displaytitle, -{T|}- or language conversion
 706                 $titleText = $pOutput->getTitleText();
 707                 if ( strval( $titleText ) !== '' ) {
 708                         $this->getContext()->getOutput()->setPageTitle( $titleText );
 709                 }
 710         }
 711
 712         /**
 713          * Show a diff page according to current request variables. For use within
 714          * Article::view() only, other callers should use the DifferenceEngine class.
 715          */
 716         protected function showDiffPage() {
 717                 $request = $this->getContext()->getRequest();
 718                 $user = $this->getContext()->getUser();
 719                 $diff = $request->getVal( 'diff' );
 720                 $rcid = $request->getVal( 'rcid' );
 721                 $diffOnly = $request->getBool( 'diffonly', $user->getOption( 'diffonly' ) );
 722                 $purge = $request->getVal( 'action' ) == 'purge';
 723                 $unhide = $request->getInt( 'unhide' ) == 1;
 724                 $oldid = $this->getOldID();
 725
 726                 $rev = $this->getRevisionFetched();
 727
 728                 if ( !$rev ) {
 729                         $this->getContext()->getOutput()->setPageTitle( wfMessage( 'errorpagetitle' ) );
 730                         $msg = $this->getContext()->msg( 'difference-missing-revision' )
 731                                 ->params( $oldid )
 732                                 ->numParams( 1 )
 733                                 ->parseAsBlock();
 734                         $this->getContext()->getOutput()->addHTML( $msg );
 735                         return;
 736                 }
 737
 738                 $contentHandler = $rev->getContentHandler();
 739                 $de = $contentHandler->createDifferenceEngine(
 740                         $this->getContext(),
 741                         $oldid,
 742                         $diff,
 743                         $rcid,
 744                         $purge,
 745                         $unhide
 746                 );
 747
 748                 // DifferenceEngine directly fetched the revision:
 749                 $this->mRevIdFetched = $de->getNewid();
 750                 $de->showDiffPage( $diffOnly );
 751
 752                 // Run view updates for the newer revision being diffed (and shown
 753                 // below the diff if not $diffOnly).
 754                 list( $old, $new ) = $de->mapDiffPrevNext( $oldid, $diff );
 755                 // New can be false, convert it to 0 - this conveniently means the latest revision
 756                 $this->mPage->doViewUpdates( $user, (int)$new );
 757         }
 758
 759         /**
 760          * Get the robot policy to be used for the current view
 761          * @param string $action The action= GET parameter
 762          * @param ParserOutput|null $pOutput
 763          * @return array The policy that should be set
 764          * @todo actions other than 'view'
 765          */
 766         public function getRobotPolicy( $action, ParserOutput $pOutput = null ) {
 767                 global $wgArticleRobotPolicies, $wgNamespaceRobotPolicies, $wgDefaultRobotPolicy;
 768
 769                 $ns = $this->getTitle()->getNamespace();
 770
 771                 # Don't index user and user talk pages for blocked users (T13443)
 772                 if ( ( $ns == NS_USER || $ns == NS_USER_TALK ) && !$this->getTitle()->isSubpage() ) {
 773                         $specificTarget = null;
 774                         $vagueTarget = null;
 775                         $titleText = $this->getTitle()->getText();
 776                         if ( IP::isValid( $titleText ) ) {
 777                                 $vagueTarget = $titleText;
 778                         } else {
 779                                 $specificTarget = $titleText;
 780                         }
 781                         if ( Block::newFromTarget( $specificTarget, $vagueTarget ) instanceof Block ) {
 782                                 return [
 783                                         'index' => 'noindex',
 784                                         'follow' => 'nofollow'
 785                                 ];
 786                         }
 787                 }
 788
 789                 if ( $this->mPage->getId() === 0 || $this->getOldID() ) {
 790                         # Non-articles (special pages etc), and old revisions
 791                         return [
 792                                 'index' => 'noindex',
 793                                 'follow' => 'nofollow'
 794                         ];
 795                 } elseif ( $this->getContext()->getOutput()->isPrintable() ) {
 796                         # Discourage indexing of printable versions, but encourage following
 797                         return [
 798                                 'index' => 'noindex',
 799                                 'follow' => 'follow'
 800                         ];
 801                 } elseif ( $this->getContext()->getRequest()->getInt( 'curid' ) ) {
 802                         # For ?curid=x urls, disallow indexing
 803                         return [
 804                                 'index' => 'noindex',
 805                                 'follow' => 'follow'
 806                         ];
 807                 }
 808
 809                 # Otherwise, construct the policy based on the various config variables.
 810                 $policy = self::formatRobotPolicy( $wgDefaultRobotPolicy );
 811
 812                 if ( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 813                         # Honour customised robot policies for this namespace
 814                         $policy = array_merge(
 815                                 $policy,
 816                                 self::formatRobotPolicy( $wgNamespaceRobotPolicies[$ns] )
 817                         );
 818                 }
 819                 if ( $this->getTitle()->canUseNoindex() && is_object( $pOutput ) && $pOutput->getIndexPolicy() ) {
 820                         # __INDEX__ and __NOINDEX__ magic words, if allowed. Incorporates
 821                         # a final sanity check that we have really got the parser output.
 822                         $policy = array_merge(
 823                                 $policy,
 824                                 [ 'index' => $pOutput->getIndexPolicy() ]
 825                         );
 826                 }
 827
 828                 if ( isset( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] ) ) {
 829                         # (T16900) site config can override user-defined __INDEX__ or __NOINDEX__
 830                         $policy = array_merge(
 831                                 $policy,
 832                                 self::formatRobotPolicy( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] )
 833                         );
 834                 }
 835
 836                 return $policy;
 837         }
 838
 839         /**
 840          * Converts a String robot policy into an associative array, to allow
 841          * merging of several policies using array_merge().
 842          * @param array|string $policy Returns empty array on null/false/'', transparent
 843          *   to already-converted arrays, converts string.
 844          * @return array 'index' => \<indexpolicy\>, 'follow' => \<followpolicy\>
 845          */
 846         public static function formatRobotPolicy( $policy ) {
 847                 if ( is_array( $policy ) ) {
 848                         return $policy;
 849                 } elseif ( !$policy ) {
 850                         return [];
 851                 }
 852
 853                 $policy = explode( ',', $policy );
 854                 $policy = array_map( 'trim', $policy );
 855
 856                 $arr = [];
 857                 foreach ( $policy as $var ) {
 858                         if ( in_array( $var, [ 'index', 'noindex' ] ) ) {
 859                                 $arr['index'] = $var;
 860                         } elseif ( in_array( $var, [ 'follow', 'nofollow' ] ) ) {
 861                                 $arr['follow'] = $var;
 862                         }
 863                 }
 864
 865                 return $arr;
 866         }
 867
 868         /**
 869          * If this request is a redirect view, send "redirected from" subtitle to
 870          * the output. Returns true if the header was needed, false if this is not
 871          * a redirect view. Handles both local and remote redirects.
 872          *
 873          * @return bool
 874          */
 875         public function showRedirectedFromHeader() {
 876                 global $wgRedirectSources;
 877
 878                 $context = $this->getContext();
 879                 $outputPage = $context->getOutput();
 880                 $request = $context->getRequest();
 881                 $rdfrom = $request->getVal( 'rdfrom' );
 882
 883                 // Construct a URL for the current page view, but with the target title
 884                 $query = $request->getValues();
 885                 unset( $query['rdfrom'] );
 886                 unset( $query['title'] );
 887                 if ( $this->getTitle()->isRedirect() ) {
 888                         // Prevent double redirects
 889                         $query['redirect'] = 'no';
 890                 }
 891                 $redirectTargetUrl = $this->getTitle()->getLinkURL( $query );
 892
 893                 if ( isset( $this->mRedirectedFrom ) ) {
 894                         // Avoid PHP 7.1 warning of passing $this by reference
 895                         $articlePage = $this;
 896
 897                         // This is an internally redirected page view.
 898                         // We'll need a backlink to the source page for navigation.
 899                         if ( Hooks::run( 'ArticleViewRedirect', [ &$articlePage ] ) ) {
 900                                 $redir = Linker::linkKnown(
 901                                         $this->mRedirectedFrom,
 902                                         null,
 903                                         [],
 904                                         [ 'redirect' => 'no' ]
 905                                 );
 906
 907                                 $outputPage->addSubtitle( "<span class=\"mw-redirectedfrom\">" .
 908                                         $context->msg( 'redirectedfrom' )->rawParams( $redir )->parse()
 909                                 . "</span>" );
 910
 911                                 // Add the script to update the displayed URL and
 912                                 // set the fragment if one was specified in the redirect
 913                                 $outputPage->addJsConfigVars( [
 914                                         'wgInternalRedirectTargetUrl' => $redirectTargetUrl,
 915                                 ] );
 916                                 $outputPage->addModules( 'mediawiki.action.view.redirect' );
 917
 918                                 // Add a <link rel="canonical"> tag
 919                                 $outputPage->setCanonicalUrl( $this->getTitle()->getCanonicalURL() );
 920
 921                                 // Tell the output object that the user arrived at this article through a redirect
 922                                 $outputPage->setRedirectedFrom( $this->mRedirectedFrom );
 923
 924                                 return true;
 925                         }
 926                 } elseif ( $rdfrom ) {
 927                         // This is an externally redirected view, from some other wiki.
 928                         // If it was reported from a trusted site, supply a backlink.
 929                         if ( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 930                                 $redir = Linker::makeExternalLink( $rdfrom, $rdfrom );
 931                                 $outputPage->addSubtitle( "<span class=\"mw-redirectedfrom\">" .
 932                                         $context->msg( 'redirectedfrom' )->rawParams( $redir )->parse()
 933                                 . "</span>" );
 934
 935                                 // Add the script to update the displayed URL
 936                                 $outputPage->addJsConfigVars( [
 937                                         'wgInternalRedirectTargetUrl' => $redirectTargetUrl,
 938                                 ] );
 939                                 $outputPage->addModules( 'mediawiki.action.view.redirect' );
 940
 941                                 return true;
 942                         }
 943                 }
 944
 945                 return false;
 946         }
 947
 948         /**
 949          * Show a header specific to the namespace currently being viewed, like
 950          * [[MediaWiki:Talkpagetext]]. For Article::view().
 951          */
 952         public function showNamespaceHeader() {
 953                 if ( $this->getTitle()->isTalkPage() ) {
 954                         if ( !wfMessage( 'talkpageheader' )->isDisabled() ) {
 955                                 $this->getContext()->getOutput()->wrapWikiMsg(
 956                                         "<div class=\"mw-talkpageheader\">\n$1\n</div>",
 957                                         [ 'talkpageheader' ]
 958                                 );
 959                         }
 960                 }
 961         }
 962
 963         /**
 964          * Show the footer section of an ordinary page view
 965          */
 966         public function showViewFooter() {
 967                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 968                 if ( $this->getTitle()->getNamespace() == NS_USER_TALK
 969                         && IP::isValid( $this->getTitle()->getText() )
 970                 ) {
 971                         $this->getContext()->getOutput()->addWikiMsg( 'anontalkpagetext' );
 972                 }
 973
 974                 // Show a footer allowing the user to patrol the shown revision or page if possible
 975                 $patrolFooterShown = $this->showPatrolFooter();
 976
 977                 Hooks::run( 'ArticleViewFooter', [ $this, $patrolFooterShown ] );
 978         }
 979
 980         /**
 981          * If patrol is possible, output a patrol UI box. This is called from the
 982          * footer section of ordinary page views. If patrol is not possible or not
 983          * desired, does nothing.
 984          * Side effect: When the patrol link is build, this method will call
 985          * OutputPage::preventClickjacking() and load mediawiki.page.patrol.ajax.
 986          *
 987          * @return bool
 988          */
 989         public function showPatrolFooter() {
 990                 global $wgUseNPPatrol, $wgUseRCPatrol, $wgUseFilePatrol;
 991
 992                 // Allow hooks to decide whether to not output this at all
 993                 if ( !Hooks::run( 'ArticleShowPatrolFooter', [ $this ] ) ) {
 994                         return false;
 995                 }
 996
 997                 $outputPage = $this->getContext()->getOutput();
 998                 $user = $this->getContext()->getUser();
 999                 $title = $this->getTitle();
1000                 $rc = false;
1001
1002                 if ( !$title->quickUserCan( 'patrol', $user )
1003                         || !( $wgUseRCPatrol || $wgUseNPPatrol
1004                                 || ( $wgUseFilePatrol && $title->inNamespace( NS_FILE ) ) )
1005                 ) {
1006                         // Patrolling is disabled or the user isn't allowed to
1007                         return false;
1008                 }
1009
1010                 if ( $this->mRevision
1011                         && !RecentChange::isInRCLifespan( $this->mRevision->getTimestamp(), 21600 )
1012                 ) {
1013                         // The current revision is already older than what could be in the RC table
1014                         // 6h tolerance because the RC might not be cleaned out regularly
1015                         return false;
1016                 }
1017
1018                 // Check for cached results
1019                 $cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
1020                 $key = $cache->makeKey( 'unpatrollable-page', $title->getArticleID() );
1021                 if ( $cache->get( $key ) ) {
1022                         return false;
1023                 }
1024
1025                 $dbr = wfGetDB( DB_REPLICA );
1026                 $oldestRevisionTimestamp = $dbr->selectField(
1027                         'revision',
1028                         'MIN( rev_timestamp )',
1029                         [ 'rev_page' => $title->getArticleID() ],
1030                         __METHOD__
1031                 );
1032
1033                 // New page patrol: Get the timestamp of the oldest revison which
1034                 // the revision table holds for the given page. Then we look
1035                 // whether it's within the RC lifespan and if it is, we try
1036                 // to get the recentchanges row belonging to that entry
1037                 // (with rc_new = 1).
1038                 $recentPageCreation = false;
1039                 if ( $oldestRevisionTimestamp
1040                         && RecentChange::isInRCLifespan( $oldestRevisionTimestamp, 21600 )
1041                 ) {
1042                         // 6h tolerance because the RC might not be cleaned out regularly
1043                         $recentPageCreation = true;
1044                         $rc = RecentChange::newFromConds(
1045                                 [
1046                                         'rc_new' => 1,
1047                                         'rc_timestamp' => $oldestRevisionTimestamp,
1048                                         'rc_namespace' => $title->getNamespace(),
1049                                         'rc_cur_id' => $title->getArticleID()
1050                                 ],
1051                                 __METHOD__
1052                         );
1053                         if ( $rc ) {
1054                                 // Use generic patrol message for new pages
1055                                 $markPatrolledMsg = wfMessage( 'markaspatrolledtext' );
1056                         }
1057                 }
1058
1059                 // File patrol: Get the timestamp of the latest upload for this page,
1060                 // check whether it is within the RC lifespan and if it is, we try
1061                 // to get the recentchanges row belonging to that entry
1062                 // (with rc_type = RC_LOG, rc_log_type = upload).
1063                 $recentFileUpload = false;
1064                 if ( ( !$rc || $rc->getAttribute( 'rc_patrolled' ) ) && $wgUseFilePatrol
1065                         && $title->getNamespace() === NS_FILE ) {
1066                         // Retrieve timestamp of most recent upload
1067                         $newestUploadTimestamp = $dbr->selectField(
1068                                 'image',
1069                                 'MAX( img_timestamp )',
1070                                 [ 'img_name' => $title->getDBkey() ],
1071                                 __METHOD__
1072                         );
1073                         if ( $newestUploadTimestamp
1074                                 && RecentChange::isInRCLifespan( $newestUploadTimestamp, 21600 )
1075                         ) {
1076                                 // 6h tolerance because the RC might not be cleaned out regularly
1077                                 $recentFileUpload = true;
1078                                 $rc = RecentChange::newFromConds(
1079                                         [
1080                                                 'rc_type' => RC_LOG,
1081                                                 'rc_log_type' => 'upload',
1082                                                 'rc_timestamp' => $newestUploadTimestamp,
1083                                                 'rc_namespace' => NS_FILE,
1084                                                 'rc_cur_id' => $title->getArticleID()
1085                                         ],
1086                                         __METHOD__
1087                                 );
1088                                 if ( $rc ) {
1089                                         // Use patrol message specific to files
1090                                         $markPatrolledMsg = wfMessage( 'markaspatrolledtext-file' );
1091                                 }
1092                         }
1093                 }
1094
1095                 if ( !$recentPageCreation && !$recentFileUpload ) {
1096                         // Page creation and latest upload (for files) is too old to be in RC
1097
1098                         // We definitely can't patrol so cache the information
1099                         // When a new file version is uploaded, the cache is cleared
1100                         $cache->set( $key, '1' );
1101
1102                         return false;
1103                 }
1104
1105                 if ( !$rc ) {
1106                         // Don't cache: This can be hit if the page gets accessed very fast after
1107                         // its creation / latest upload or in case we have high replica DB lag. In case
1108                         // the revision is too old, we will already return above.
1109                         return false;
1110                 }
1111
1112                 if ( $rc->getAttribute( 'rc_patrolled' ) ) {
1113                         // Patrolled RC entry around
1114
1115                         // Cache the information we gathered above in case we can't patrol
1116                         // Don't cache in case we can patrol as this could change
1117                         $cache->set( $key, '1' );
1118
1119                         return false;
1120                 }
1121
1122                 if ( $rc->getPerformer()->equals( $user ) ) {
1123                         // Don't show a patrol link for own creations/uploads. If the user could
1124                         // patrol them, they already would be patrolled
1125                         return false;
1126                 }
1127
1128                 $outputPage->preventClickjacking();
1129                 if ( $user->isAllowed( 'writeapi' ) ) {
1130                         $outputPage->addModules( 'mediawiki.page.patrol.ajax' );
1131                 }
1132
1133                 $link = Linker::linkKnown(
1134                         $title,
1135                         $markPatrolledMsg->escaped(),
1136                         [],
1137                         [
1138                                 'action' => 'markpatrolled',
1139                                 'rcid' => $rc->getAttribute( 'rc_id' ),
1140                         ]
1141                 );
1142
1143                 $outputPage->addHTML(
1144                         "<div class='patrollink' data-mw='interface'>" .
1145                                 wfMessage( 'markaspatrolledlink' )->rawParams( $link )->escaped() .
1146                         '</div>'
1147                 );
1148
1149                 return true;
1150         }
1151
1152         /**
1153          * Purge the cache used to check if it is worth showing the patrol footer
1154          * For example, it is done during re-uploads when file patrol is used.
1155          * @param int $articleID ID of the article to purge
1156          * @since 1.27
1157          */
1158         public static function purgePatrolFooterCache( $articleID ) {
1159                 $cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
1160                 $cache->delete( $cache->makeKey( 'unpatrollable-page', $articleID ) );
1161         }
1162
1163         /**
1164          * Show the error text for a missing article. For articles in the MediaWiki
1165          * namespace, show the default message text. To be called from Article::view().
1166          */
1167         public function showMissingArticle() {
1168                 global $wgSend404Code;
1169
1170                 $outputPage = $this->getContext()->getOutput();
1171                 // Whether the page is a root user page of an existing user (but not a subpage)
1172                 $validUserPage = false;
1173
1174                 $title = $this->getTitle();
1175
1176                 # Show info in user (talk) namespace. Does the user exist? Is he blocked?
1177                 if ( $title->getNamespace() == NS_USER
1178                         || $title->getNamespace() == NS_USER_TALK
1179                 ) {
1180                         $rootPart = explode( '/', $title->getText() )[0];
1181                         $user = User::newFromName( $rootPart, false /* allow IP users */ );
1182                         $ip = User::isIP( $rootPart );
1183                         $block = Block::newFromTarget( $user, $user );
1184
1185                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
1186                                 $outputPage->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n\$1\n</div>",
1187                                         [ 'userpage-userdoesnotexist-view', wfEscapeWikiText( $rootPart ) ] );
1188                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
1189                                 # Show log extract if the user is currently blocked
1190                                 LogEventsList::showLogExtract(
1191                                         $outputPage,
1192                                         'block',
1193                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
1194                                         '',
1195                                         [
1196                                                 'lim' => 1,
1197                                                 'showIfEmpty' => false,
1198                                                 'msgKey' => [
1199                                                         'blocked-notice-logextract',
1200                                                         $user->getName() # Support GENDER in notice
1201                                                 ]
1202                                         ]
1203                                 );
1204                                 $validUserPage = !$title->isSubpage();
1205                         } else {
1206                                 $validUserPage = !$title->isSubpage();
1207                         }
1208                 }
1209
1210                 Hooks::run( 'ShowMissingArticle', [ $this ] );
1211
1212                 # Show delete and move logs if there were any such events.
1213                 # The logging query can DOS the site when bots/crawlers cause 404 floods,
1214                 # so be careful showing this. 404 pages must be cheap as they are hard to cache.
1215                 $cache = MediaWikiServices::getInstance()->getMainObjectStash();
1216                 $key = $cache->makeKey( 'page-recent-delete', md5( $title->getPrefixedText() ) );
1217                 $loggedIn = $this->getContext()->getUser()->isLoggedIn();
1218                 $sessionExists = $this->getContext()->getRequest()->getSession()->isPersistent();
1219                 if ( $loggedIn || $cache->get( $key ) || $sessionExists ) {
1220                         $logTypes = [ 'delete', 'move', 'protect' ];
1221
1222                         $dbr = wfGetDB( DB_REPLICA );
1223
1224                         $conds = [ 'log_action != ' . $dbr->addQuotes( 'revision' ) ];
1225                         // Give extensions a chance to hide their (unrelated) log entries
1226                         Hooks::run( 'Article::MissingArticleConditions', [ &$conds, $logTypes ] );
1227                         LogEventsList::showLogExtract(
1228                                 $outputPage,
1229                                 $logTypes,
1230                                 $title,
1231                                 '',
1232                                 [
1233                                         'lim' => 10,
1234                                         'conds' => $conds,
1235                                         'showIfEmpty' => false,
1236                                         'msgKey' => [ $loggedIn || $sessionExists
1237                                                 ? 'moveddeleted-notice'
1238                                                 : 'moveddeleted-notice-recent'
1239                                         ]
1240                                 ]
1241                         );
1242                 }
1243
1244                 if ( !$this->mPage->hasViewableContent() && $wgSend404Code && !$validUserPage ) {
1245                         // If there's no backing content, send a 404 Not Found
1246                         // for better machine handling of broken links.
1247                         $this->getContext()->getRequest()->response()->statusHeader( 404 );
1248                 }
1249
1250                 // Also apply the robot policy for nonexisting pages (even if a 404 was used for sanity)
1251                 $policy = $this->getRobotPolicy( 'view' );
1252                 $outputPage->setIndexPolicy( $policy['index'] );
1253                 $outputPage->setFollowPolicy( $policy['follow'] );
1254
1255                 $hookResult = Hooks::run( 'BeforeDisplayNoArticleText', [ $this ] );
1256
1257                 if ( !$hookResult ) {
1258                         return;
1259                 }
1260
1261                 # Show error message
1262                 $oldid = $this->getOldID();
1263                 if ( !$oldid && $title->getNamespace() === NS_MEDIAWIKI && $title->hasSourceText() ) {
1264                         $outputPage->addParserOutput( $this->getContentObject()->getParserOutput( $title ) );
1265                 } else {
1266                         if ( $oldid ) {
1267                                 $text = wfMessage( 'missing-revision', $oldid )->plain();
1268                         } elseif ( $title->quickUserCan( 'create', $this->getContext()->getUser() )
1269                                 && $title->quickUserCan( 'edit', $this->getContext()->getUser() )
1270                         ) {
1271                                 $message = $this->getContext()->getUser()->isLoggedIn() ? 'noarticletext' : 'noarticletextanon';
1272                                 $text = wfMessage( $message )->plain();
1273                         } else {
1274                                 $text = wfMessage( 'noarticletext-nopermission' )->plain();
1275                         }
1276
1277                         $dir = $this->getContext()->getLanguage()->getDir();
1278                         $lang = $this->getContext()->getLanguage()->getHtmlCode();
1279                         $outputPage->addWikiText( Xml::openElement( 'div', [
1280                                 'class' => "noarticletext mw-content-$dir",
1281                                 'dir' => $dir,
1282                                 'lang' => $lang,
1283                         ] ) . "\n$text\n</div>" );
1284                 }
1285         }
1286
1287         /**
1288          * If the revision requested for view is deleted, check permissions.
1289          * Send either an error message or a warning header to the output.
1290          *
1291          * @return bool True if the view is allowed, false if not.
1292          */
1293         public function showDeletedRevisionHeader() {
1294                 if ( !$this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1295                         // Not deleted
1296                         return true;
1297                 }
1298
1299                 $outputPage = $this->getContext()->getOutput();
1300                 $user = $this->getContext()->getUser();
1301                 // If the user is not allowed to see it...
1302                 if ( !$this->mRevision->userCan( Revision::DELETED_TEXT, $user ) ) {
1303                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1304                                 'rev-deleted-text-permission' );
1305
1306                         return false;
1307                 // If the user needs to confirm that they want to see it...
1308                 } elseif ( $this->getContext()->getRequest()->getInt( 'unhide' ) != 1 ) {
1309                         # Give explanation and add a link to view the revision...
1310                         $oldid = intval( $this->getOldID() );
1311                         $link = $this->getTitle()->getFullURL( "oldid={$oldid}&unhide=1" );
1312                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1313                                 'rev-suppressed-text-unhide' : 'rev-deleted-text-unhide';
1314                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1315                                 [ $msg, $link ] );
1316
1317                         return false;
1318                 // We are allowed to see...
1319                 } else {
1320                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1321                                 'rev-suppressed-text-view' : 'rev-deleted-text-view';
1322                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", $msg );
1323
1324                         return true;
1325                 }
1326         }
1327
1328         /**
1329          * Generate the navigation links when browsing through an article revisions
1330          * It shows the information as:
1331          *   Revision as of \<date\>; view current revision
1332          *   \<- Previous version | Next Version -\>
1333          *
1334          * @param int $oldid Revision ID of this article revision
1335          */
1336         public function setOldSubtitle( $oldid = 0 ) {
1337                 // Avoid PHP 7.1 warning of passing $this by reference
1338                 $articlePage = $this;
1339
1340                 if ( !Hooks::run( 'DisplayOldSubtitle', [ &$articlePage, &$oldid ] ) ) {
1341                         return;
1342                 }
1343
1344                 $context = $this->getContext();
1345                 $unhide = $context->getRequest()->getInt( 'unhide' ) == 1;
1346
1347                 # Cascade unhide param in links for easy deletion browsing
1348                 $extraParams = [];
1349                 if ( $unhide ) {
1350                         $extraParams['unhide'] = 1;
1351                 }
1352
1353                 if ( $this->mRevision && $this->mRevision->getId() === $oldid ) {
1354                         $revision = $this->mRevision;
1355                 } else {
1356                         $revision = Revision::newFromId( $oldid );
1357                 }
1358
1359                 $timestamp = $revision->getTimestamp();
1360
1361                 $current = ( $oldid == $this->mPage->getLatest() );
1362                 $language = $context->getLanguage();
1363                 $user = $context->getUser();
1364
1365                 $td = $language->userTimeAndDate( $timestamp, $user );
1366                 $tddate = $language->userDate( $timestamp, $user );
1367                 $tdtime = $language->userTime( $timestamp, $user );
1368
1369                 # Show user links if allowed to see them. If hidden, then show them only if requested...
1370                 $userlinks = Linker::revUserTools( $revision, !$unhide );
1371
1372                 $infomsg = $current && !$context->msg( 'revision-info-current' )->isDisabled()
1373                         ? 'revision-info-current'
1374                         : 'revision-info';
1375
1376                 $outputPage = $context->getOutput();
1377                 $revisionInfo = "<div id=\"mw-{$infomsg}\">" .
1378                         $context->msg( $infomsg, $td )
1379                                 ->rawParams( $userlinks )
1380                                 ->params( $revision->getId(), $tddate, $tdtime, $revision->getUserText() )
1381                                 ->rawParams( Linker::revComment( $revision, true, true ) )
1382                                 ->parse() .
1383                         "</div>";
1384
1385                 $lnk = $current
1386                         ? $context->msg( 'currentrevisionlink' )->escaped()
1387                         : Linker::linkKnown(
1388                                 $this->getTitle(),
1389                                 $context->msg( 'currentrevisionlink' )->escaped(),
1390                                 [],
1391                                 $extraParams
1392                         );
1393                 $curdiff = $current
1394                         ? $context->msg( 'diff' )->escaped()
1395                         : Linker::linkKnown(
1396                                 $this->getTitle(),
1397                                 $context->msg( 'diff' )->escaped(),
1398                                 [],
1399                                 [
1400                                         'diff' => 'cur',
1401                                         'oldid' => $oldid
1402                                 ] + $extraParams
1403                         );
1404                 $prev = $this->getTitle()->getPreviousRevisionID( $oldid );
1405                 $prevlink = $prev
1406                         ? Linker::linkKnown(
1407                                 $this->getTitle(),
1408                                 $context->msg( 'previousrevision' )->escaped(),
1409                                 [],
1410                                 [
1411                                         'direction' => 'prev',
1412                                         'oldid' => $oldid
1413                                 ] + $extraParams
1414                         )
1415                         : $context->msg( 'previousrevision' )->escaped();
1416                 $prevdiff = $prev
1417                         ? Linker::linkKnown(
1418                                 $this->getTitle(),
1419                                 $context->msg( 'diff' )->escaped(),
1420                                 [],
1421                                 [
1422                                         'diff' => 'prev',
1423                                         'oldid' => $oldid
1424                                 ] + $extraParams
1425                         )
1426                         : $context->msg( 'diff' )->escaped();
1427                 $nextlink = $current
1428                         ? $context->msg( 'nextrevision' )->escaped()
1429                         : Linker::linkKnown(
1430                                 $this->getTitle(),
1431                                 $context->msg( 'nextrevision' )->escaped(),
1432                                 [],
1433                                 [
1434                                         'direction' => 'next',
1435                                         'oldid' => $oldid
1436                                 ] + $extraParams
1437                         );
1438                 $nextdiff = $current
1439                         ? $context->msg( 'diff' )->escaped()
1440                         : Linker::linkKnown(
1441                                 $this->getTitle(),
1442                                 $context->msg( 'diff' )->escaped(),
1443                                 [],
1444                                 [
1445                                         'diff' => 'next',
1446                                         'oldid' => $oldid
1447                                 ] + $extraParams
1448                         );
1449
1450                 $cdel = Linker::getRevDeleteLink( $user, $revision, $this->getTitle() );
1451                 if ( $cdel !== '' ) {
1452                         $cdel .= ' ';
1453                 }
1454
1455                 // the outer div is need for styling the revision info and nav in MobileFrontend
1456                 $outputPage->addSubtitle( "<div class=\"mw-revision\">" . $revisionInfo .
1457                         "<div id=\"mw-revision-nav\">" . $cdel .
1458                         $context->msg( 'revision-nav' )->rawParams(
1459                                 $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff
1460                         )->escaped() . "</div></div>" );
1461         }
1462
1463         /**
1464          * Return the HTML for the top of a redirect page
1465          *
1466          * Chances are you should just be using the ParserOutput from
1467          * WikitextContent::getParserOutput instead of calling this for redirects.
1468          *
1469          * @param Title|array $target Destination(s) to redirect
1470          * @param bool $appendSubtitle [optional]
1471          * @param bool $forceKnown Should the image be shown as a bluelink regardless of existence?
1472          * @return string Containing HTML with redirect link
1473          *
1474          * @deprecated since 1.30
1475          */
1476         public function viewRedirect( $target, $appendSubtitle = true, $forceKnown = false ) {
1477                 $lang = $this->getTitle()->getPageLanguage();
1478                 $out = $this->getContext()->getOutput();
1479                 if ( $appendSubtitle ) {
1480                         $out->addSubtitle( wfMessage( 'redirectpagesub' ) );
1481                 }
1482                 $out->addModuleStyles( 'mediawiki.action.view.redirectPage' );
1483                 return static::getRedirectHeaderHtml( $lang, $target, $forceKnown );
1484         }
1485
1486         /**
1487          * Return the HTML for the top of a redirect page
1488          *
1489          * Chances are you should just be using the ParserOutput from
1490          * WikitextContent::getParserOutput instead of calling this for redirects.
1491          *
1492          * @since 1.23
1493          * @param Language $lang
1494          * @param Title|array $target Destination(s) to redirect
1495          * @param bool $forceKnown Should the image be shown as a bluelink regardless of existence?
1496          * @return string Containing HTML with redirect link
1497          */
1498         public static function getRedirectHeaderHtml( Language $lang, $target, $forceKnown = false ) {
1499                 if ( !is_array( $target ) ) {
1500                         $target = [ $target ];
1501                 }
1502
1503                 $html = '<ul class="redirectText">';
1504                 /** @var Title $title */
1505                 foreach ( $target as $title ) {
1506                         $html .= '<li>' . Linker::link(
1507                                 $title,
1508                                 htmlspecialchars( $title->getFullText() ),
1509                                 [],
1510                                 // Make sure wiki page redirects are not followed
1511                                 $title->isRedirect() ? [ 'redirect' => 'no' ] : [],
1512                                 ( $forceKnown ? [ 'known', 'noclasses' ] : [] )
1513                         ) . '</li>';
1514                 }
1515                 $html .= '</ul>';
1516
1517                 $redirectToText = wfMessage( 'redirectto' )->inLanguage( $lang )->escaped();
1518
1519                 return '<div class="redirectMsg">' .
1520                         '<p>' . $redirectToText . '</p>' .
1521                         $html .
1522                         '</div>';
1523         }
1524
1525         /**
1526          * Adds help link with an icon via page indicators.
1527          * Link target can be overridden by a local message containing a wikilink:
1528          * the message key is: 'namespace-' + namespace number + '-helppage'.
1529          * @param string $to Target MediaWiki.org page title or encoded URL.
1530          * @param bool $overrideBaseUrl Whether $url is a full URL, to avoid MW.o.
1531          * @since 1.25
1532          */
1533         public function addHelpLink( $to, $overrideBaseUrl = false ) {
1534                 $msg = wfMessage(
1535                         'namespace-' . $this->getTitle()->getNamespace() . '-helppage'
1536                 );
1537
1538                 $out = $this->getContext()->getOutput();
1539                 if ( !$msg->isDisabled() ) {
1540                         $helpUrl = Skin::makeUrl( $msg->plain() );
1541                         $out->addHelpLink( $helpUrl, true );
1542                 } else {
1543                         $out->addHelpLink( $to, $overrideBaseUrl );
1544                 }
1545         }
1546
1547         /**
1548          * Handle action=render
1549          */
1550         public function render() {
1551                 $this->getContext()->getRequest()->response()->header( 'X-Robots-Tag: noindex' );
1552                 $this->getContext()->getOutput()->setArticleBodyOnly( true );
1553                 $this->disableSectionEditForRender = true;
1554                 $this->view();
1555         }
1556
1557         /**
1558          * action=protect handler
1559          */
1560         public function protect() {
1561                 $form = new ProtectionForm( $this );
1562                 $form->execute();
1563         }
1564
1565         /**
1566          * action=unprotect handler (alias)
1567          */
1568         public function unprotect() {
1569                 $this->protect();
1570         }
1571
1572         /**
1573          * UI entry point for page deletion
1574          */
1575         public function delete() {
1576                 # This code desperately needs to be totally rewritten
1577
1578                 $title = $this->getTitle();
1579                 $context = $this->getContext();
1580                 $user = $context->getUser();
1581                 $request = $context->getRequest();
1582
1583                 # Check permissions
1584                 $permissionErrors = $title->getUserPermissionsErrors( 'delete', $user );
1585                 if ( count( $permissionErrors ) ) {
1586                         throw new PermissionsError( 'delete', $permissionErrors );
1587                 }
1588
1589                 # Read-only check...
1590                 if ( wfReadOnly() ) {
1591                         throw new ReadOnlyError;
1592                 }
1593
1594                 # Better double-check that it hasn't been deleted yet!
1595                 $this->mPage->loadPageData(
1596                         $request->wasPosted() ? WikiPage::READ_LATEST : WikiPage::READ_NORMAL
1597                 );
1598                 if ( !$this->mPage->exists() ) {
1599                         $deleteLogPage = new LogPage( 'delete' );
1600                         $outputPage = $context->getOutput();
1601                         $outputPage->setPageTitle( $context->msg( 'cannotdelete-title', $title->getPrefixedText() ) );
1602                         $outputPage->wrapWikiMsg( "<div class=\"error mw-error-cannotdelete\">\n$1\n</div>",
1603                                         [ 'cannotdelete', wfEscapeWikiText( $title->getPrefixedText() ) ]
1604                                 );
1605                         $outputPage->addHTML(
1606                                 Xml::element( 'h2', null, $deleteLogPage->getName()->text() )
1607                         );
1608                         LogEventsList::showLogExtract(
1609                                 $outputPage,
1610                                 'delete',
1611                                 $title
1612                         );
1613
1614                         return;
1615                 }
1616
1617                 $deleteReasonList = $request->getText( 'wpDeleteReasonList', 'other' );
1618                 $deleteReason = $request->getText( 'wpReason' );
1619
1620                 if ( $deleteReasonList == 'other' ) {
1621                         $reason = $deleteReason;
1622                 } elseif ( $deleteReason != '' ) {
1623                         // Entry from drop down menu + additional comment
1624                         $colonseparator = wfMessage( 'colon-separator' )->inContentLanguage()->text();
1625                         $reason = $deleteReasonList . $colonseparator . $deleteReason;
1626                 } else {
1627                         $reason = $deleteReasonList;
1628                 }
1629
1630                 if ( $request->wasPosted() && $user->matchEditToken( $request->getVal( 'wpEditToken' ),
1631                         [ 'delete', $this->getTitle()->getPrefixedText() ] )
1632                 ) {
1633                         # Flag to hide all contents of the archived revisions
1634                         $suppress = $request->getCheck( 'wpSuppress' ) && $user->isAllowed( 'suppressrevision' );
1635
1636                         $this->doDelete( $reason, $suppress );
1637
1638                         WatchAction::doWatchOrUnwatch( $request->getCheck( 'wpWatch' ), $title, $user );
1639
1640                         return;
1641                 }
1642
1643                 // Generate deletion reason
1644                 $hasHistory = false;
1645                 if ( !$reason ) {
1646                         try {
1647                                 $reason = $this->generateReason( $hasHistory );
1648                         } catch ( Exception $e ) {
1649                                 # if a page is horribly broken, we still want to be able to
1650                                 # delete it. So be lenient about errors here.
1651                                 wfDebug( "Error while building auto delete summary: $e" );
1652                                 $reason = '';
1653                         }
1654                 }
1655
1656                 // If the page has a history, insert a warning
1657                 if ( $hasHistory ) {
1658                         $title = $this->getTitle();
1659
1660                         // The following can use the real revision count as this is only being shown for users
1661                         // that can delete this page.
1662                         // This, as a side-effect, also makes sure that the following query isn't being run for
1663                         // pages with a larger history, unless the user has the 'bigdelete' right
1664                         // (and is about to delete this page).
1665                         $dbr = wfGetDB( DB_REPLICA );
1666                         $revisions = $edits = (int)$dbr->selectField(
1667                                 'revision',
1668                                 'COUNT(rev_page)',
1669                                 [ 'rev_page' => $title->getArticleID() ],
1670                                 __METHOD__
1671                         );
1672
1673                         // @todo FIXME: i18n issue/patchwork message
1674                         $context->getOutput()->addHTML(
1675                                 '<strong class="mw-delete-warning-revisions">' .
1676                                 $context->msg( 'historywarning' )->numParams( $revisions )->parse() .
1677                                 $context->msg( 'word-separator' )->escaped() . Linker::linkKnown( $title,
1678                                         $context->msg( 'history' )->escaped(),
1679                                         [],
1680                                         [ 'action' => 'history' ] ) .
1681                                 '</strong>'
1682                         );
1683
1684                         if ( $title->isBigDeletion() ) {
1685                                 global $wgDeleteRevisionsLimit;
1686                                 $context->getOutput()->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
1687                                         [
1688                                                 'delete-warning-toobig',
1689                                                 $context->getLanguage()->formatNum( $wgDeleteRevisionsLimit )
1690                                         ]
1691                                 );
1692                         }
1693                 }
1694
1695                 $this->confirmDelete( $reason );
1696         }
1697
1698         /**
1699          * Output deletion confirmation dialog
1700          * @todo FIXME: Move to another file?
1701          * @param string $reason Prefilled reason
1702          */
1703         public function confirmDelete( $reason ) {
1704                 wfDebug( "Article::confirmDelete\n" );
1705
1706                 $title = $this->getTitle();
1707                 $ctx = $this->getContext();
1708                 $outputPage = $ctx->getOutput();
1709                 $outputPage->setPageTitle( wfMessage( 'delete-confirm', $title->getPrefixedText() ) );
1710                 $outputPage->addBacklinkSubtitle( $title );
1711                 $outputPage->setRobotPolicy( 'noindex,nofollow' );
1712                 $outputPage->addModules( 'mediawiki.action.delete' );
1713
1714                 $backlinkCache = $title->getBacklinkCache();
1715                 if ( $backlinkCache->hasLinks( 'pagelinks' ) || $backlinkCache->hasLinks( 'templatelinks' ) ) {
1716                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1717                                 'deleting-backlinks-warning' );
1718                 }
1719
1720                 $subpageQueryLimit = 51;
1721                 $subpages = $title->getSubpages( $subpageQueryLimit );
1722                 $subpageCount = count( $subpages );
1723                 if ( $subpageCount > 0 ) {
1724                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1725                                 [ 'deleting-subpages-warning', Message::numParam( $subpageCount ) ] );
1726                 }
1727                 $outputPage->addWikiMsg( 'confirmdeletetext' );
1728
1729                 Hooks::run( 'ArticleConfirmDelete', [ $this, $outputPage, &$reason ] );
1730
1731                 $user = $this->getContext()->getUser();
1732                 $checkWatch = $user->getBoolOption( 'watchdeletion' ) || $user->isWatched( $title );
1733
1734                 $outputPage->enableOOUI();
1735
1736                 $options = Xml::listDropDownOptions(
1737                         $ctx->msg( 'deletereason-dropdown' )->inContentLanguage()->text(),
1738                         [ 'other' => $ctx->msg( 'deletereasonotherlist' )->inContentLanguage()->text() ]
1739                 );
1740                 $options = Xml::listDropDownOptionsOoui( $options );
1741
1742                 $fields[] = new OOUI\FieldLayout(
1743                         new OOUI\DropdownInputWidget( [
1744                                 'name' => 'wpDeleteReasonList',
1745                                 'inputId' => 'wpDeleteReasonList',
1746                                 'tabIndex' => 1,
1747                                 'infusable' => true,
1748                                 'value' => '',
1749                                 'options' => $options
1750                         ] ),
1751                         [
1752                                 'label' => $ctx->msg( 'deletecomment' )->text(),
1753                                 'align' => 'top',
1754                         ]
1755                 );
1756
1757                 // HTML maxlength uses "UTF-16 code units", which means that characters outside BMP
1758                 // (e.g. emojis) count for two each. This limit is overridden in JS to instead count
1759                 // Unicode codepoints (or 255 UTF-8 bytes for old schema).
1760                 $conf = $this->getContext()->getConfig();
1761                 $oldCommentSchema = $conf->get( 'CommentTableSchemaMigrationStage' ) === MIGRATION_OLD;
1762                 $fields[] = new OOUI\FieldLayout(
1763                         new OOUI\TextInputWidget( [
1764                                 'name' => 'wpReason',
1765                                 'inputId' => 'wpReason',
1766                                 'tabIndex' => 2,
1767                                 'maxLength' => $oldCommentSchema ? 255 : CommentStore::COMMENT_CHARACTER_LIMIT,
1768                                 'infusable' => true,
1769                                 'value' => $reason,
1770                                 'autofocus' => true,
1771                         ] ),
1772                         [
1773                                 'label' => $ctx->msg( 'deleteotherreason' )->text(),
1774                                 'align' => 'top',
1775                         ]
1776                 );
1777
1778                 if ( $user->isLoggedIn() ) {
1779                         $fields[] = new OOUI\FieldLayout(
1780                                 new OOUI\CheckboxInputWidget( [
1781                                         'name' => 'wpWatch',
1782                                         'inputId' => 'wpWatch',
1783                                         'tabIndex' => 3,
1784                                         'selected' => $checkWatch,
1785                                 ] ),
1786                                 [
1787                                         'label' => $ctx->msg( 'watchthis' )->text(),
1788                                         'align' => 'inline',
1789                                         'infusable' => true,
1790                                 ]
1791                         );
1792                 }
1793
1794                 if ( $user->isAllowed( 'suppressrevision' ) ) {
1795                         $fields[] = new OOUI\FieldLayout(
1796                                 new OOUI\CheckboxInputWidget( [
1797                                         'name' => 'wpSuppress',
1798                                         'inputId' => 'wpSuppress',
1799                                         'tabIndex' => 4,
1800                                 ] ),
1801                                 [
1802                                         'label' => $ctx->msg( 'revdelete-suppress' )->text(),
1803                                         'align' => 'inline',
1804                                         'infusable' => true,
1805                                 ]
1806                         );
1807                 }
1808
1809                 $fields[] = new OOUI\FieldLayout(
1810                         new OOUI\ButtonInputWidget( [
1811                                 'name' => 'wpConfirmB',
1812                                 'inputId' => 'wpConfirmB',
1813                                 'tabIndex' => 5,
1814                                 'value' => $ctx->msg( 'deletepage' )->text(),
1815                                 'label' => $ctx->msg( 'deletepage' )->text(),
1816                                 'flags' => [ 'primary', 'destructive' ],
1817                                 'type' => 'submit',
1818                         ] ),
1819                         [
1820                                 'align' => 'top',
1821                         ]
1822                 );
1823
1824                 $fieldset = new OOUI\FieldsetLayout( [
1825                         'label' => $ctx->msg( 'delete-legend' )->text(),
1826                         'id' => 'mw-delete-table',
1827                         'items' => $fields,
1828                 ] );
1829
1830                 $form = new OOUI\FormLayout( [
1831                         'method' => 'post',
1832                         'action' => $title->getLocalURL( 'action=delete' ),
1833                         'id' => 'deleteconfirm',
1834                 ] );
1835                 $form->appendContent(
1836                         $fieldset,
1837                         new OOUI\HtmlSnippet(
1838                                 Html::hidden( 'wpEditToken', $user->getEditToken( [ 'delete', $title->getPrefixedText() ] ) )
1839                         )
1840                 );
1841
1842                 $outputPage->addHTML(
1843                         new OOUI\PanelLayout( [
1844                                 'classes' => [ 'deletepage-wrapper' ],
1845                                 'expanded' => false,
1846                                 'padded' => true,
1847                                 'framed' => true,
1848                                 'content' => $form,
1849                         ] )
1850                 );
1851
1852                 if ( $user->isAllowed( 'editinterface' ) ) {
1853                         $link = Linker::linkKnown(
1854                                 $ctx->msg( 'deletereason-dropdown' )->inContentLanguage()->getTitle(),
1855                                 wfMessage( 'delete-edit-reasonlist' )->escaped(),
1856                                 [],
1857                                 [ 'action' => 'edit' ]
1858                         );
1859                         $outputPage->addHTML( '<p class="mw-delete-editreasons">' . $link . '</p>' );
1860                 }
1861
1862                 $deleteLogPage = new LogPage( 'delete' );
1863                 $outputPage->addHTML( Xml::element( 'h2', null, $deleteLogPage->getName()->text() ) );
1864                 LogEventsList::showLogExtract( $outputPage, 'delete', $title );
1865         }
1866
1867         /**
1868          * Perform a deletion and output success or failure messages
1869          * @param string $reason
1870          * @param bool $suppress
1871          */
1872         public function doDelete( $reason, $suppress = false ) {
1873                 $error = '';
1874                 $context = $this->getContext();
1875                 $outputPage = $context->getOutput();
1876                 $user = $context->getUser();
1877                 $status = $this->mPage->doDeleteArticleReal( $reason, $suppress, 0, true, $error, $user );
1878
1879                 if ( $status->isGood() ) {
1880                         $deleted = $this->getTitle()->getPrefixedText();
1881
1882                         $outputPage->setPageTitle( wfMessage( 'actioncomplete' ) );
1883                         $outputPage->setRobotPolicy( 'noindex,nofollow' );
1884
1885                         $loglink = '[[Special:Log/delete|' . wfMessage( 'deletionlog' )->text() . ']]';
1886
1887                         $outputPage->addWikiMsg( 'deletedtext', wfEscapeWikiText( $deleted ), $loglink );
1888
1889                         Hooks::run( 'ArticleDeleteAfterSuccess', [ $this->getTitle(), $outputPage ] );
1890
1891                         $outputPage->returnToMain( false );
1892                 } else {
1893                         $outputPage->setPageTitle(
1894                                 wfMessage( 'cannotdelete-title',
1895                                         $this->getTitle()->getPrefixedText() )
1896                         );
1897
1898                         if ( $error == '' ) {
1899                                 $outputPage->addWikiText(
1900                                         "<div class=\"error mw-error-cannotdelete\">\n" . $status->getWikiText() . "\n</div>"
1901                                 );
1902                                 $deleteLogPage = new LogPage( 'delete' );
1903                                 $outputPage->addHTML( Xml::element( 'h2', null, $deleteLogPage->getName()->text() ) );
1904
1905                                 LogEventsList::showLogExtract(
1906                                         $outputPage,
1907                                         'delete',
1908                                         $this->getTitle()
1909                                 );
1910                         } else {
1911                                 $outputPage->addHTML( $error );
1912                         }
1913                 }
1914         }
1915
1916         /* Caching functions */
1917
1918         /**
1919          * checkLastModified returns true if it has taken care of all
1920          * output to the client that is necessary for this request.
1921          * (that is, it has sent a cached version of the page)
1922          *
1923          * @return bool True if cached version send, false otherwise
1924          */
1925         protected function tryFileCache() {
1926                 static $called = false;
1927
1928                 if ( $called ) {
1929                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
1930                         return false;
1931                 }
1932
1933                 $called = true;
1934                 if ( $this->isFileCacheable() ) {
1935                         $cache = new HTMLFileCache( $this->getTitle(), 'view' );
1936                         if ( $cache->isCacheGood( $this->mPage->getTouched() ) ) {
1937                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
1938                                 $cache->loadFromFileCache( $this->getContext() );
1939                                 return true;
1940                         } else {
1941                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
1942                                 ob_start( [ &$cache, 'saveToFileCache' ] );
1943                         }
1944                 } else {
1945                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
1946                 }
1947
1948                 return false;
1949         }
1950
1951         /**
1952          * Check if the page can be cached
1953          * @param int $mode One of the HTMLFileCache::MODE_* constants (since 1.28)
1954          * @return bool
1955          */
1956         public function isFileCacheable( $mode = HTMLFileCache::MODE_NORMAL ) {
1957                 $cacheable = false;
1958
1959                 if ( HTMLFileCache::useFileCache( $this->getContext(), $mode ) ) {
1960                         $cacheable = $this->mPage->getId()
1961                                 && !$this->mRedirectedFrom && !$this->getTitle()->isRedirect();
1962                         // Extension may have reason to disable file caching on some pages.
1963                         if ( $cacheable ) {
1964                                 // Avoid PHP 7.1 warning of passing $this by reference
1965                                 $articlePage = $this;
1966                                 $cacheable = Hooks::run( 'IsFileCacheable', [ &$articlePage ] );
1967                         }
1968                 }
1969
1970                 return $cacheable;
1971         }
1972
1973         /**#@-*/
1974
1975         /**
1976          * Lightweight method to get the parser output for a page, checking the parser cache
1977          * and so on. Doesn't consider most of the stuff that WikiPage::view is forced to
1978          * consider, so it's not appropriate to use there.
1979          *
1980          * @since 1.16 (r52326) for LiquidThreads
1981          *
1982          * @param int|null $oldid Revision ID or null
1983          * @param User|null $user The relevant user
1984          * @return ParserOutput|bool ParserOutput or false if the given revision ID is not found
1985          */
1986         public function getParserOutput( $oldid = null, User $user = null ) {
1987                 // XXX: bypasses mParserOptions and thus setParserOptions()
1988
1989                 if ( $user === null ) {
1990                         $parserOptions = $this->getParserOptions();
1991                 } else {
1992                         $parserOptions = $this->mPage->makeParserOptions( $user );
1993                 }
1994
1995                 return $this->mPage->getParserOutput( $parserOptions, $oldid );
1996         }
1997
1998         /**
1999          * Override the ParserOptions used to render the primary article wikitext.
2000          *
2001          * @param ParserOptions $options
2002          * @throws MWException If the parser options where already initialized.
2003          */
2004         public function setParserOptions( ParserOptions $options ) {
2005                 if ( $this->mParserOptions ) {
2006                         throw new MWException( "can't change parser options after they have already been set" );
2007                 }
2008
2009                 // clone, so if $options is modified later, it doesn't confuse the parser cache.
2010                 $this->mParserOptions = clone $options;
2011         }
2012
2013         /**
2014          * Get parser options suitable for rendering the primary article wikitext
2015          * @return ParserOptions
2016          */
2017         public function getParserOptions() {
2018                 if ( !$this->mParserOptions ) {
2019                         $this->mParserOptions = $this->mPage->makeParserOptions( $this->getContext() );
2020                 }
2021                 // Clone to allow modifications of the return value without affecting cache
2022                 return clone $this->mParserOptions;
2023         }
2024
2025         /**
2026          * Sets the context this Article is executed in
2027          *
2028          * @param IContextSource $context
2029          * @since 1.18
2030          */
2031         public function setContext( $context ) {
2032                 $this->mContext = $context;
2033         }
2034
2035         /**
2036          * Gets the context this Article is executed in
2037          *
2038          * @return IContextSource
2039          * @since 1.18
2040          */
2041         public function getContext() {
2042                 if ( $this->mContext instanceof IContextSource ) {
2043                         return $this->mContext;
2044                 } else {
2045                         wfDebug( __METHOD__ . " called and \$mContext is null. " .
2046                                 "Return RequestContext::getMain(); for sanity\n" );
2047                         return RequestContext::getMain();
2048                 }
2049         }
2050
2051         /**
2052          * Use PHP's magic __get handler to handle accessing of
2053          * raw WikiPage fields for backwards compatibility.
2054          *
2055          * @param string $fname Field name
2056          * @return mixed
2057          */
2058         public function __get( $fname ) {
2059                 if ( property_exists( $this->mPage, $fname ) ) {
2060                         # wfWarn( "Access to raw $fname field " . __CLASS__ );
2061                         return $this->mPage->$fname;
2062                 }
2063                 trigger_error( 'Inaccessible property via __get(): ' . $fname, E_USER_NOTICE );
2064         }
2065
2066         /**
2067          * Use PHP's magic __set handler to handle setting of
2068          * raw WikiPage fields for backwards compatibility.
2069          *
2070          * @param string $fname Field name
2071          * @param mixed $fvalue New value
2072          */
2073         public function __set( $fname, $fvalue ) {
2074                 if ( property_exists( $this->mPage, $fname ) ) {
2075                         # wfWarn( "Access to raw $fname field of " . __CLASS__ );
2076                         $this->mPage->$fname = $fvalue;
2077                 // Note: extensions may want to toss on new fields
2078                 } elseif ( !in_array( $fname, [ 'mContext', 'mPage' ] ) ) {
2079                         $this->mPage->$fname = $fvalue;
2080                 } else {
2081                         trigger_error( 'Inaccessible property via __set(): ' . $fname, E_USER_NOTICE );
2082                 }
2083         }
2084
2085         /**
2086          * Call to WikiPage function for backwards compatibility.
2087          * @see WikiPage::checkFlags
2088          */
2089         public function checkFlags( $flags ) {
2090                 return $this->mPage->checkFlags( $flags );
2091         }
2092
2093         /**
2094          * Call to WikiPage function for backwards compatibility.
2095          * @see WikiPage::checkTouched
2096          */
2097         public function checkTouched() {
2098                 return $this->mPage->checkTouched();
2099         }
2100
2101         /**
2102          * Call to WikiPage function for backwards compatibility.
2103          * @see WikiPage::clearPreparedEdit
2104          */
2105         public function clearPreparedEdit() {
2106                 $this->mPage->clearPreparedEdit();
2107         }
2108
2109         /**
2110          * Call to WikiPage function for backwards compatibility.
2111          * @see WikiPage::doDeleteArticleReal
2112          */
2113         public function doDeleteArticleReal(
2114                 $reason, $suppress = false, $u1 = null, $u2 = null, &$error = '', User $user = null,
2115                 $tags = []
2116         ) {
2117                 return $this->mPage->doDeleteArticleReal(
2118                         $reason, $suppress, $u1, $u2, $error, $user, $tags
2119                 );
2120         }
2121
2122         /**
2123          * Call to WikiPage function for backwards compatibility.
2124          * @see WikiPage::doDeleteUpdates
2125          */
2126         public function doDeleteUpdates( $id, Content $content = null ) {
2127                 return $this->mPage->doDeleteUpdates( $id, $content );
2128         }
2129
2130         /**
2131          * Call to WikiPage function for backwards compatibility.
2132          * @deprecated since 1.29. Use WikiPage::doEditContent() directly instead
2133          * @see WikiPage::doEditContent
2134          */
2135         public function doEditContent( Content $content, $summary, $flags = 0, $originalRevId = false,
2136                 User $user = null, $serialFormat = null
2137         ) {
2138                 wfDeprecated( __METHOD__, '1.29' );
2139                 return $this->mPage->doEditContent( $content, $summary, $flags, $originalRevId,
2140                         $user, $serialFormat
2141                 );
2142         }
2143
2144         /**
2145          * Call to WikiPage function for backwards compatibility.
2146          * @see WikiPage::doEditUpdates
2147          */
2148         public function doEditUpdates( Revision $revision, User $user, array $options = [] ) {
2149                 return $this->mPage->doEditUpdates( $revision, $user, $options );
2150         }
2151
2152         /**
2153          * Call to WikiPage function for backwards compatibility.
2154          * @see WikiPage::doPurge
2155          * @note In 1.28 (and only 1.28), this took a $flags parameter that
2156          *  controlled how much purging was done.
2157          */
2158         public function doPurge() {
2159                 return $this->mPage->doPurge();
2160         }
2161
2162         /**
2163          * Call to WikiPage function for backwards compatibility.
2164          * @see WikiPage::doViewUpdates
2165          */
2166         public function doViewUpdates( User $user, $oldid = 0 ) {
2167                 $this->mPage->doViewUpdates( $user, $oldid );
2168         }
2169
2170         /**
2171          * Call to WikiPage function for backwards compatibility.
2172          * @see WikiPage::exists
2173          */
2174         public function exists() {
2175                 return $this->mPage->exists();
2176         }
2177
2178         /**
2179          * Call to WikiPage function for backwards compatibility.
2180          * @see WikiPage::followRedirect
2181          */
2182         public function followRedirect() {
2183                 return $this->mPage->followRedirect();
2184         }
2185
2186         /**
2187          * Call to WikiPage function for backwards compatibility.
2188          * @see ContentHandler::getActionOverrides
2189          */
2190         public function getActionOverrides() {
2191                 return $this->mPage->getActionOverrides();
2192         }
2193
2194         /**
2195          * Call to WikiPage function for backwards compatibility.
2196          * @see WikiPage::getAutoDeleteReason
2197          */
2198         public function getAutoDeleteReason( &$hasHistory ) {
2199                 return $this->mPage->getAutoDeleteReason( $hasHistory );
2200         }
2201
2202         /**
2203          * Call to WikiPage function for backwards compatibility.
2204          * @see WikiPage::getCategories
2205          */
2206         public function getCategories() {
2207                 return $this->mPage->getCategories();
2208         }
2209
2210         /**
2211          * Call to WikiPage function for backwards compatibility.
2212          * @see WikiPage::getComment
2213          */
2214         public function getComment( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2215                 return $this->mPage->getComment( $audience, $user );
2216         }
2217
2218         /**
2219          * Call to WikiPage function for backwards compatibility.
2220          * @see WikiPage::getContentHandler
2221          */
2222         public function getContentHandler() {
2223                 return $this->mPage->getContentHandler();
2224         }
2225
2226         /**
2227          * Call to WikiPage function for backwards compatibility.
2228          * @see WikiPage::getContentModel
2229          */
2230         public function getContentModel() {
2231                 return $this->mPage->getContentModel();
2232         }
2233
2234         /**
2235          * Call to WikiPage function for backwards compatibility.
2236          * @see WikiPage::getContributors
2237          */
2238         public function getContributors() {
2239                 return $this->mPage->getContributors();
2240         }
2241
2242         /**
2243          * Call to WikiPage function for backwards compatibility.
2244          * @see WikiPage::getCreator
2245          */
2246         public function getCreator( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2247                 return $this->mPage->getCreator( $audience, $user );
2248         }
2249
2250         /**
2251          * Call to WikiPage function for backwards compatibility.
2252          * @see WikiPage::getDeletionUpdates
2253          */
2254         public function getDeletionUpdates( Content $content = null ) {
2255                 return $this->mPage->getDeletionUpdates( $content );
2256         }
2257
2258         /**
2259          * Call to WikiPage function for backwards compatibility.
2260          * @see WikiPage::getHiddenCategories
2261          */
2262         public function getHiddenCategories() {
2263                 return $this->mPage->getHiddenCategories();
2264         }
2265
2266         /**
2267          * Call to WikiPage function for backwards compatibility.
2268          * @see WikiPage::getId
2269          */
2270         public function getId() {
2271                 return $this->mPage->getId();
2272         }
2273
2274         /**
2275          * Call to WikiPage function for backwards compatibility.
2276          * @see WikiPage::getLatest
2277          */
2278         public function getLatest() {
2279                 return $this->mPage->getLatest();
2280         }
2281
2282         /**
2283          * Call to WikiPage function for backwards compatibility.
2284          * @see WikiPage::getLinksTimestamp
2285          */
2286         public function getLinksTimestamp() {
2287                 return $this->mPage->getLinksTimestamp();
2288         }
2289
2290         /**
2291          * Call to WikiPage function for backwards compatibility.
2292          * @see WikiPage::getMinorEdit
2293          */
2294         public function getMinorEdit() {
2295                 return $this->mPage->getMinorEdit();
2296         }
2297
2298         /**
2299          * Call to WikiPage function for backwards compatibility.
2300          * @see WikiPage::getOldestRevision
2301          */
2302         public function getOldestRevision() {
2303                 return $this->mPage->getOldestRevision();
2304         }
2305
2306         /**
2307          * Call to WikiPage function for backwards compatibility.
2308          * @see WikiPage::getRedirectTarget
2309          */
2310         public function getRedirectTarget() {
2311                 return $this->mPage->getRedirectTarget();
2312         }
2313
2314         /**
2315          * Call to WikiPage function for backwards compatibility.
2316          * @see WikiPage::getRedirectURL
2317          */
2318         public function getRedirectURL( $rt ) {
2319                 return $this->mPage->getRedirectURL( $rt );
2320         }
2321
2322         /**
2323          * Call to WikiPage function for backwards compatibility.
2324          * @see WikiPage::getRevision
2325          */
2326         public function getRevision() {
2327                 return $this->mPage->getRevision();
2328         }
2329
2330         /**
2331          * Call to WikiPage function for backwards compatibility.
2332          * @see WikiPage::getTimestamp
2333          */
2334         public function getTimestamp() {
2335                 return $this->mPage->getTimestamp();
2336         }
2337
2338         /**
2339          * Call to WikiPage function for backwards compatibility.
2340          * @see WikiPage::getTouched
2341          */
2342         public function getTouched() {
2343                 return $this->mPage->getTouched();
2344         }
2345
2346         /**
2347          * Call to WikiPage function for backwards compatibility.
2348          * @see WikiPage::getUndoContent
2349          */
2350         public function getUndoContent( Revision $undo, Revision $undoafter = null ) {
2351                 return $this->mPage->getUndoContent( $undo, $undoafter );
2352         }
2353
2354         /**
2355          * Call to WikiPage function for backwards compatibility.
2356          * @see WikiPage::getUser
2357          */
2358         public function getUser( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2359                 return $this->mPage->getUser( $audience, $user );
2360         }
2361
2362         /**
2363          * Call to WikiPage function for backwards compatibility.
2364          * @see WikiPage::getUserText
2365          */
2366         public function getUserText( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2367                 return $this->mPage->getUserText( $audience, $user );
2368         }
2369
2370         /**
2371          * Call to WikiPage function for backwards compatibility.
2372          * @see WikiPage::hasViewableContent
2373          */
2374         public function hasViewableContent() {
2375                 return $this->mPage->hasViewableContent();
2376         }
2377
2378         /**
2379          * Call to WikiPage function for backwards compatibility.
2380          * @see WikiPage::insertOn
2381          */
2382         public function insertOn( $dbw, $pageId = null ) {
2383                 return $this->mPage->insertOn( $dbw, $pageId );
2384         }
2385
2386         /**
2387          * Call to WikiPage function for backwards compatibility.
2388          * @see WikiPage::insertProtectNullRevision
2389          */
2390         public function insertProtectNullRevision( $revCommentMsg, array $limit,
2391                 array $expiry, $cascade, $reason, $user = null
2392         ) {
2393                 return $this->mPage->insertProtectNullRevision( $revCommentMsg, $limit,
2394                         $expiry, $cascade, $reason, $user
2395                 );
2396         }
2397
2398         /**
2399          * Call to WikiPage function for backwards compatibility.
2400          * @see WikiPage::insertRedirect
2401          */
2402         public function insertRedirect() {
2403                 return $this->mPage->insertRedirect();
2404         }
2405
2406         /**
2407          * Call to WikiPage function for backwards compatibility.
2408          * @see WikiPage::insertRedirectEntry
2409          */
2410         public function insertRedirectEntry( Title $rt, $oldLatest = null ) {
2411                 return $this->mPage->insertRedirectEntry( $rt, $oldLatest );
2412         }
2413
2414         /**
2415          * Call to WikiPage function for backwards compatibility.
2416          * @see WikiPage::isCountable
2417          */
2418         public function isCountable( $editInfo = false ) {
2419                 return $this->mPage->isCountable( $editInfo );
2420         }
2421
2422         /**
2423          * Call to WikiPage function for backwards compatibility.
2424          * @see WikiPage::isRedirect
2425          */
2426         public function isRedirect() {
2427                 return $this->mPage->isRedirect();
2428         }
2429
2430         /**
2431          * Call to WikiPage function for backwards compatibility.
2432          * @see WikiPage::loadFromRow
2433          */
2434         public function loadFromRow( $data, $from ) {
2435                 return $this->mPage->loadFromRow( $data, $from );
2436         }
2437
2438         /**
2439          * Call to WikiPage function for backwards compatibility.
2440          * @see WikiPage::loadPageData
2441          */
2442         public function loadPageData( $from = 'fromdb' ) {
2443                 $this->mPage->loadPageData( $from );
2444         }
2445
2446         /**
2447          * Call to WikiPage function for backwards compatibility.
2448          * @see WikiPage::lockAndGetLatest
2449          */
2450         public function lockAndGetLatest() {
2451                 return $this->mPage->lockAndGetLatest();
2452         }
2453
2454         /**
2455          * Call to WikiPage function for backwards compatibility.
2456          * @see WikiPage::makeParserOptions
2457          */
2458         public function makeParserOptions( $context ) {
2459                 return $this->mPage->makeParserOptions( $context );
2460         }
2461
2462         /**
2463          * Call to WikiPage function for backwards compatibility.
2464          * @see WikiPage::pageDataFromId
2465          */
2466         public function pageDataFromId( $dbr, $id, $options = [] ) {
2467                 return $this->mPage->pageDataFromId( $dbr, $id, $options );
2468         }
2469
2470         /**
2471          * Call to WikiPage function for backwards compatibility.
2472          * @see WikiPage::pageDataFromTitle
2473          */
2474         public function pageDataFromTitle( $dbr, $title, $options = [] ) {
2475                 return $this->mPage->pageDataFromTitle( $dbr, $title, $options );
2476         }
2477
2478         /**
2479          * Call to WikiPage function for backwards compatibility.
2480          * @see WikiPage::prepareContentForEdit
2481          */
2482         public function prepareContentForEdit(
2483                 Content $content, $revision = null, User $user = null,
2484                 $serialFormat = null, $useCache = true
2485         ) {
2486                 return $this->mPage->prepareContentForEdit(
2487                         $content, $revision, $user,
2488                         $serialFormat, $useCache
2489                 );
2490         }
2491
2492         /**
2493          * Call to WikiPage function for backwards compatibility.
2494          * @see WikiPage::protectDescription
2495          */
2496         public function protectDescription( array $limit, array $expiry ) {
2497                 return $this->mPage->protectDescription( $limit, $expiry );
2498         }
2499
2500         /**
2501          * Call to WikiPage function for backwards compatibility.
2502          * @see WikiPage::protectDescriptionLog
2503          */
2504         public function protectDescriptionLog( array $limit, array $expiry ) {
2505                 return $this->mPage->protectDescriptionLog( $limit, $expiry );
2506         }
2507
2508         /**
2509          * Call to WikiPage function for backwards compatibility.
2510          * @see WikiPage::replaceSectionAtRev
2511          */
2512         public function replaceSectionAtRev( $sectionId, Content $sectionContent,
2513                 $sectionTitle = '', $baseRevId = null
2514         ) {
2515                 return $this->mPage->replaceSectionAtRev( $sectionId, $sectionContent,
2516                         $sectionTitle, $baseRevId
2517                 );
2518         }
2519
2520         /**
2521          * Call to WikiPage function for backwards compatibility.
2522          * @see WikiPage::replaceSectionContent
2523          */
2524         public function replaceSectionContent(
2525                 $sectionId, Content $sectionContent, $sectionTitle = '', $edittime = null
2526         ) {
2527                 return $this->mPage->replaceSectionContent(
2528                         $sectionId, $sectionContent, $sectionTitle, $edittime
2529                 );
2530         }
2531
2532         /**
2533          * Call to WikiPage function for backwards compatibility.
2534          * @see WikiPage::setTimestamp
2535          */
2536         public function setTimestamp( $ts ) {
2537                 return $this->mPage->setTimestamp( $ts );
2538         }
2539
2540         /**
2541          * Call to WikiPage function for backwards compatibility.
2542          * @see WikiPage::shouldCheckParserCache
2543          */
2544         public function shouldCheckParserCache( ParserOptions $parserOptions, $oldId ) {
2545                 return $this->mPage->shouldCheckParserCache( $parserOptions, $oldId );
2546         }
2547
2548         /**
2549          * Call to WikiPage function for backwards compatibility.
2550          * @see WikiPage::supportsSections
2551          */
2552         public function supportsSections() {
2553                 return $this->mPage->supportsSections();
2554         }
2555
2556         /**
2557          * Call to WikiPage function for backwards compatibility.
2558          * @see WikiPage::triggerOpportunisticLinksUpdate
2559          */
2560         public function triggerOpportunisticLinksUpdate( ParserOutput $parserOutput ) {
2561                 return $this->mPage->triggerOpportunisticLinksUpdate( $parserOutput );
2562         }
2563
2564         /**
2565          * Call to WikiPage function for backwards compatibility.
2566          * @see WikiPage::updateCategoryCounts
2567          */
2568         public function updateCategoryCounts( array $added, array $deleted, $id = 0 ) {
2569                 return $this->mPage->updateCategoryCounts( $added, $deleted, $id );
2570         }
2571
2572         /**
2573          * Call to WikiPage function for backwards compatibility.
2574          * @see WikiPage::updateIfNewerOn
2575          */
2576         public function updateIfNewerOn( $dbw, $revision ) {
2577                 return $this->mPage->updateIfNewerOn( $dbw, $revision );
2578         }
2579
2580         /**
2581          * Call to WikiPage function for backwards compatibility.
2582          * @see WikiPage::updateRedirectOn
2583          */
2584         public function updateRedirectOn( $dbw, $redirectTitle, $lastRevIsRedirect = null ) {
2585                 return $this->mPage->updateRedirectOn( $dbw, $redirectTitle, $lastRevIsRedirect );
2586         }
2587
2588         /**
2589          * Call to WikiPage function for backwards compatibility.
2590          * @see WikiPage::updateRevisionOn
2591          */
2592         public function updateRevisionOn( $dbw, $revision, $lastRevision = null,
2593                 $lastRevIsRedirect = null
2594         ) {
2595                 return $this->mPage->updateRevisionOn( $dbw, $revision, $lastRevision,
2596                         $lastRevIsRedirect
2597                 );
2598         }
2599
2600         /**
2601          * @param array $limit
2602          * @param array $expiry
2603          * @param bool &$cascade
2604          * @param string $reason
2605          * @param User $user
2606          * @return Status
2607          */
2608         public function doUpdateRestrictions( array $limit, array $expiry, &$cascade,
2609                 $reason, User $user
2610         ) {
2611                 return $this->mPage->doUpdateRestrictions( $limit, $expiry, $cascade, $reason, $user );
2612         }
2613
2614         /**
2615          * @param array $limit
2616          * @param string $reason
2617          * @param int &$cascade
2618          * @param array $expiry
2619          * @return bool
2620          */
2621         public function updateRestrictions( $limit = [], $reason = '',
2622                 &$cascade = 0, $expiry = []
2623         ) {
2624                 return $this->mPage->doUpdateRestrictions(
2625                         $limit,
2626                         $expiry,
2627                         $cascade,
2628                         $reason,
2629                         $this->getContext()->getUser()
2630                 );
2631         }
2632
2633         /**
2634          * @param string $reason
2635          * @param bool $suppress
2636          * @param int|null $u1 Unused
2637          * @param bool|null $u2 Unused
2638          * @param string &$error
2639          * @return bool
2640          */
2641         public function doDeleteArticle(
2642                 $reason, $suppress = false, $u1 = null, $u2 = null, &$error = ''
2643         ) {
2644                 return $this->mPage->doDeleteArticle( $reason, $suppress, $u1, $u2, $error );
2645         }
2646
2647         /**
2648          * @param string $fromP
2649          * @param string $summary
2650          * @param string $token
2651          * @param bool $bot
2652          * @param array &$resultDetails
2653          * @param User|null $user
2654          * @return array
2655          */
2656         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails, User $user = null ) {
2657                 $user = is_null( $user ) ? $this->getContext()->getUser() : $user;
2658                 return $this->mPage->doRollback( $fromP, $summary, $token, $bot, $resultDetails, $user );
2659         }
2660
2661         /**
2662          * @param string $fromP
2663          * @param string $summary
2664          * @param bool $bot
2665          * @param array &$resultDetails
2666          * @param User|null $guser
2667          * @return array
2668          */
2669         public function commitRollback( $fromP, $summary, $bot, &$resultDetails, User $guser = null ) {
2670                 $guser = is_null( $guser ) ? $this->getContext()->getUser() : $guser;
2671                 return $this->mPage->commitRollback( $fromP, $summary, $bot, $resultDetails, $guser );
2672         }
2673
2674         /**
2675          * @param bool &$hasHistory
2676          * @return mixed
2677          */
2678         public function generateReason( &$hasHistory ) {
2679                 $title = $this->mPage->getTitle();
2680                 $handler = ContentHandler::getForTitle( $title );
2681                 return $handler->getAutoDeleteReason( $title, $hasHistory );
2682         }
2683
2684         // ******
2685 }