includes/page/Article.php

   1 <?php
   2 /**
   3  * User interface for page actions.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22 use MediaWiki\MediaWikiServices;
  23
  24 /**
  25  * Class for viewing MediaWiki article and history.
  26  *
  27  * This maintains WikiPage functions for backwards compatibility.
  28  *
  29  * @todo Move and rewrite code to an Action class
  30  *
  31  * See design.txt for an overview.
  32  * Note: edit user interface and cache support functions have been
  33  * moved to separate EditPage and HTMLFileCache classes.
  34  */
  35 class Article implements Page {
  36         /** @var IContextSource The context this Article is executed in */
  37         protected $mContext;
  38
  39         /** @var WikiPage The WikiPage object of this instance */
  40         protected $mPage;
  41
  42         /** @var ParserOptions ParserOptions object for $wgUser articles */
  43         public $mParserOptions;
  44
  45         /**
  46          * @var string Text of the revision we are working on
  47          * @todo BC cruft
  48          */
  49         public $mContent;
  50
  51         /**
  52          * @var Content Content of the revision we are working on
  53          * @since 1.21
  54          */
  55         public $mContentObject;
  56
  57         /** @var bool Is the content ($mContent) already loaded? */
  58         public $mContentLoaded = false;
  59
  60         /** @var int|null The oldid of the article that is to be shown, 0 for the current revision */
  61         public $mOldId;
  62
  63         /** @var Title Title from which we were redirected here */
  64         public $mRedirectedFrom = null;
  65
  66         /** @var string|bool URL to redirect to or false if none */
  67         public $mRedirectUrl = false;
  68
  69         /** @var int Revision ID of revision we are working on */
  70         public $mRevIdFetched = 0;
  71
  72         /** @var Revision Revision we are working on */
  73         public $mRevision = null;
  74
  75         /** @var ParserOutput */
  76         public $mParserOutput;
  77
  78         /**
  79          * Constructor and clear the article
  80          * @param Title $title Reference to a Title object.
  81          * @param int $oldId Revision ID, null to fetch from request, zero for current
  82          */
  83         public function __construct( Title $title, $oldId = null ) {
  84                 $this->mOldId = $oldId;
  85                 $this->mPage = $this->newPage( $title );
  86         }
  87
  88         /**
  89          * @param Title $title
  90          * @return WikiPage
  91          */
  92         protected function newPage( Title $title ) {
  93                 return new WikiPage( $title );
  94         }
  95
  96         /**
  97          * Constructor from a page id
  98          * @param int $id Article ID to load
  99          * @return Article|null
 100          */
 101         public static function newFromID( $id ) {
 102                 $t = Title::newFromID( $id );
 103                 return $t == null ? null : new static( $t );
 104         }
 105
 106         /**
 107          * Create an Article object of the appropriate class for the given page.
 108          *
 109          * @param Title $title
 110          * @param IContextSource $context
 111          * @return Article
 112          */
 113         public static function newFromTitle( $title, IContextSource $context ) {
 114                 if ( NS_MEDIA == $title->getNamespace() ) {
 115                         // FIXME: where should this go?
 116                         $title = Title::makeTitle( NS_FILE, $title->getDBkey() );
 117                 }
 118
 119                 $page = null;
 120                 Hooks::run( 'ArticleFromTitle', [ &$title, &$page, $context ] );
 121                 if ( !$page ) {
 122                         switch ( $title->getNamespace() ) {
 123                                 case NS_FILE:
 124                                         $page = new ImagePage( $title );
 125                                         break;
 126                                 case NS_CATEGORY:
 127                                         $page = new CategoryPage( $title );
 128                                         break;
 129                                 default:
 130                                         $page = new Article( $title );
 131                         }
 132                 }
 133                 $page->setContext( $context );
 134
 135                 return $page;
 136         }
 137
 138         /**
 139          * Create an Article object of the appropriate class for the given page.
 140          *
 141          * @param WikiPage $page
 142          * @param IContextSource $context
 143          * @return Article
 144          */
 145         public static function newFromWikiPage( WikiPage $page, IContextSource $context ) {
 146                 $article = self::newFromTitle( $page->getTitle(), $context );
 147                 $article->mPage = $page; // override to keep process cached vars
 148                 return $article;
 149         }
 150
 151         /**
 152          * Get the page this view was redirected from
 153          * @return Title|null
 154          * @since 1.28
 155          */
 156         public function getRedirectedFrom() {
 157                 return $this->mRedirectedFrom;
 158         }
 159
 160         /**
 161          * Tell the page view functions that this view was redirected
 162          * from another page on the wiki.
 163          * @param Title $from
 164          */
 165         public function setRedirectedFrom( Title $from ) {
 166                 $this->mRedirectedFrom = $from;
 167         }
 168
 169         /**
 170          * Get the title object of the article
 171          *
 172          * @return Title Title object of this page
 173          */
 174         public function getTitle() {
 175                 return $this->mPage->getTitle();
 176         }
 177
 178         /**
 179          * Get the WikiPage object of this instance
 180          *
 181          * @since 1.19
 182          * @return WikiPage
 183          */
 184         public function getPage() {
 185                 return $this->mPage;
 186         }
 187
 188         /**
 189          * Clear the object
 190          */
 191         public function clear() {
 192                 $this->mContentLoaded = false;
 193
 194                 $this->mRedirectedFrom = null; # Title object if set
 195                 $this->mRevIdFetched = 0;
 196                 $this->mRedirectUrl = false;
 197
 198                 $this->mPage->clear();
 199         }
 200
 201         /**
 202          * Returns a Content object representing the pages effective display content,
 203          * not necessarily the revision's content!
 204          *
 205          * Note that getContent does not follow redirects anymore.
 206          * If you need to fetch redirectable content easily, try
 207          * the shortcut in WikiPage::getRedirectTarget()
 208          *
 209          * This function has side effects! Do not use this function if you
 210          * only want the real revision text if any.
 211          *
 212          * @return Content Return the content of this revision
 213          *
 214          * @since 1.21
 215          */
 216         protected function getContentObject() {
 217                 if ( $this->mPage->getId() === 0 ) {
 218                         # If this is a MediaWiki:x message, then load the messages
 219                         # and return the message value for x.
 220                         if ( $this->getTitle()->getNamespace() == NS_MEDIAWIKI ) {
 221                                 $text = $this->getTitle()->getDefaultMessageText();
 222                                 if ( $text === false ) {
 223                                         $text = '';
 224                                 }
 225
 226                                 $content = ContentHandler::makeContent( $text, $this->getTitle() );
 227                         } else {
 228                                 $message = $this->getContext()->getUser()->isLoggedIn() ? 'noarticletext' : 'noarticletextanon';
 229                                 $content = new MessageContent( $message, null, 'parsemag' );
 230                         }
 231                 } else {
 232                         $this->fetchContentObject();
 233                         $content = $this->mContentObject;
 234                 }
 235
 236                 return $content;
 237         }
 238
 239         /**
 240          * @return int The oldid of the article that is to be shown, 0 for the current revision
 241          */
 242         public function getOldID() {
 243                 if ( is_null( $this->mOldId ) ) {
 244                         $this->mOldId = $this->getOldIDFromRequest();
 245                 }
 246
 247                 return $this->mOldId;
 248         }
 249
 250         /**
 251          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 252          *
 253          * @return int The old id for the request
 254          */
 255         public function getOldIDFromRequest() {
 256                 $this->mRedirectUrl = false;
 257
 258                 $request = $this->getContext()->getRequest();
 259                 $oldid = $request->getIntOrNull( 'oldid' );
 260
 261                 if ( $oldid === null ) {
 262                         return 0;
 263                 }
 264
 265                 if ( $oldid !== 0 ) {
 266                         # Load the given revision and check whether the page is another one.
 267                         # In that case, update this instance to reflect the change.
 268                         if ( $oldid === $this->mPage->getLatest() ) {
 269                                 $this->mRevision = $this->mPage->getRevision();
 270                         } else {
 271                                 $this->mRevision = Revision::newFromId( $oldid );
 272                                 if ( $this->mRevision !== null ) {
 273                                         // Revision title doesn't match the page title given?
 274                                         if ( $this->mPage->getId() != $this->mRevision->getPage() ) {
 275                                                 $function = [ get_class( $this->mPage ), 'newFromID' ];
 276                                                 $this->mPage = call_user_func( $function, $this->mRevision->getPage() );
 277                                         }
 278                                 }
 279                         }
 280                 }
 281
 282                 if ( $request->getVal( 'direction' ) == 'next' ) {
 283                         $nextid = $this->getTitle()->getNextRevisionID( $oldid );
 284                         if ( $nextid ) {
 285                                 $oldid = $nextid;
 286                                 $this->mRevision = null;
 287                         } else {
 288                                 $this->mRedirectUrl = $this->getTitle()->getFullURL( 'redirect=no' );
 289                         }
 290                 } elseif ( $request->getVal( 'direction' ) == 'prev' ) {
 291                         $previd = $this->getTitle()->getPreviousRevisionID( $oldid );
 292                         if ( $previd ) {
 293                                 $oldid = $previd;
 294                                 $this->mRevision = null;
 295                         }
 296                 }
 297
 298                 return $oldid;
 299         }
 300
 301         /**
 302          * Get text content object
 303          * Does *NOT* follow redirects.
 304          * @todo When is this null?
 305          *
 306          * @note Code that wants to retrieve page content from the database should
 307          * use WikiPage::getContent().
 308          *
 309          * @return Content|null|bool
 310          *
 311          * @since 1.21
 312          */
 313         protected function fetchContentObject() {
 314                 if ( $this->mContentLoaded ) {
 315                         return $this->mContentObject;
 316                 }
 317
 318                 $this->mContentLoaded = true;
 319                 $this->mContent = null;
 320
 321                 $oldid = $this->getOldID();
 322
 323                 # Pre-fill content with error message so that if something
 324                 # fails we'll have something telling us what we intended.
 325                 // XXX: this isn't page content but a UI message. horrible.
 326                 $this->mContentObject = new MessageContent( 'missing-revision', [ $oldid ] );
 327
 328                 if ( $oldid ) {
 329                         # $this->mRevision might already be fetched by getOldIDFromRequest()
 330                         if ( !$this->mRevision ) {
 331                                 $this->mRevision = Revision::newFromId( $oldid );
 332                                 if ( !$this->mRevision ) {
 333                                         wfDebug( __METHOD__ . " failed to retrieve specified revision, id $oldid\n" );
 334                                         return false;
 335                                 }
 336                         }
 337                 } else {
 338                         $oldid = $this->mPage->getLatest();
 339                         if ( !$oldid ) {
 340                                 wfDebug( __METHOD__ . " failed to find page data for title " .
 341                                         $this->getTitle()->getPrefixedText() . "\n" );
 342                                 return false;
 343                         }
 344
 345                         # Update error message with correct oldid
 346                         $this->mContentObject = new MessageContent( 'missing-revision', [ $oldid ] );
 347
 348                         $this->mRevision = $this->mPage->getRevision();
 349
 350                         if ( !$this->mRevision ) {
 351                                 wfDebug( __METHOD__ . " failed to retrieve current page, rev_id $oldid\n" );
 352                                 return false;
 353                         }
 354                 }
 355
 356                 // @todo FIXME: Horrible, horrible! This content-loading interface just plain sucks.
 357                 // We should instead work with the Revision object when we need it...
 358                 // Loads if user is allowed
 359                 $content = $this->mRevision->getContent(
 360                         Revision::FOR_THIS_USER,
 361                         $this->getContext()->getUser()
 362                 );
 363
 364                 if ( !$content ) {
 365                         wfDebug( __METHOD__ . " failed to retrieve content of revision " .
 366                                 $this->mRevision->getId() . "\n" );
 367                         return false;
 368                 }
 369
 370                 $this->mContentObject = $content;
 371                 $this->mRevIdFetched = $this->mRevision->getId();
 372
 373                 // Avoid PHP 7.1 warning of passing $this by reference
 374                 $articlePage = $this;
 375
 376                 Hooks::run(
 377                         'ArticleAfterFetchContentObject',
 378                         [ &$articlePage, &$this->mContentObject ]
 379                 );
 380
 381                 return $this->mContentObject;
 382         }
 383
 384         /**
 385          * Returns true if the currently-referenced revision is the current edit
 386          * to this page (and it exists).
 387          * @return bool
 388          */
 389         public function isCurrent() {
 390                 # If no oldid, this is the current version.
 391                 if ( $this->getOldID() == 0 ) {
 392                         return true;
 393                 }
 394
 395                 return $this->mPage->exists() && $this->mRevision && $this->mRevision->isCurrent();
 396         }
 397
 398         /**
 399          * Get the fetched Revision object depending on request parameters or null
 400          * on failure.
 401          *
 402          * @since 1.19
 403          * @return Revision|null
 404          */
 405         public function getRevisionFetched() {
 406                 $this->fetchContentObject();
 407
 408                 return $this->mRevision;
 409         }
 410
 411         /**
 412          * Use this to fetch the rev ID used on page views
 413          *
 414          * @return int Revision ID of last article revision
 415          */
 416         public function getRevIdFetched() {
 417                 if ( $this->mRevIdFetched ) {
 418                         return $this->mRevIdFetched;
 419                 } else {
 420                         return $this->mPage->getLatest();
 421                 }
 422         }
 423
 424         /**
 425          * This is the default action of the index.php entry point: just view the
 426          * page of the given title.
 427          */
 428         public function view() {
 429                 global $wgUseFileCache, $wgDebugToolbar;
 430
 431                 # Get variables from query string
 432                 # As side effect this will load the revision and update the title
 433                 # in a revision ID is passed in the request, so this should remain
 434                 # the first call of this method even if $oldid is used way below.
 435                 $oldid = $this->getOldID();
 436
 437                 $user = $this->getContext()->getUser();
 438                 # Another whitelist check in case getOldID() is altering the title
 439                 $permErrors = $this->getTitle()->getUserPermissionsErrors( 'read', $user );
 440                 if ( count( $permErrors ) ) {
 441                         wfDebug( __METHOD__ . ": denied on secondary read check\n" );
 442                         throw new PermissionsError( 'read', $permErrors );
 443                 }
 444
 445                 $outputPage = $this->getContext()->getOutput();
 446                 # getOldID() may as well want us to redirect somewhere else
 447                 if ( $this->mRedirectUrl ) {
 448                         $outputPage->redirect( $this->mRedirectUrl );
 449                         wfDebug( __METHOD__ . ": redirecting due to oldid\n" );
 450
 451                         return;
 452                 }
 453
 454                 # If we got diff in the query, we want to see a diff page instead of the article.
 455                 if ( $this->getContext()->getRequest()->getCheck( 'diff' ) ) {
 456                         wfDebug( __METHOD__ . ": showing diff page\n" );
 457                         $this->showDiffPage();
 458
 459                         return;
 460                 }
 461
 462                 # Set page title (may be overridden by DISPLAYTITLE)
 463                 $outputPage->setPageTitle( $this->getTitle()->getPrefixedText() );
 464
 465                 $outputPage->setArticleFlag( true );
 466                 # Allow frames by default
 467                 $outputPage->allowClickjacking();
 468
 469                 $parserCache = MediaWikiServices::getInstance()->getParserCache();
 470
 471                 $parserOptions = $this->getParserOptions();
 472                 # Render printable version, use printable version cache
 473                 if ( $outputPage->isPrintable() ) {
 474                         $parserOptions->setIsPrintable( true );
 475                         $parserOptions->setEditSection( false );
 476                 } elseif ( !$this->isCurrent() || !$this->getTitle()->quickUserCan( 'edit', $user ) ) {
 477                         $parserOptions->setEditSection( false );
 478                 }
 479
 480                 # Try client and file cache
 481                 if ( !$wgDebugToolbar && $oldid === 0 && $this->mPage->checkTouched() ) {
 482                         # Try to stream the output from file cache
 483                         if ( $wgUseFileCache && $this->tryFileCache() ) {
 484                                 wfDebug( __METHOD__ . ": done file cache\n" );
 485                                 # tell wgOut that output is taken care of
 486                                 $outputPage->disable();
 487                                 $this->mPage->doViewUpdates( $user, $oldid );
 488
 489                                 return;
 490                         }
 491                 }
 492
 493                 # Should the parser cache be used?
 494                 $useParserCache = $this->mPage->shouldCheckParserCache( $parserOptions, $oldid );
 495                 wfDebug( 'Article::view using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
 496                 if ( $user->getStubThreshold() ) {
 497                         MediaWikiServices::getInstance()->getStatsdDataFactory()->increment( 'pcache_miss_stub' );
 498                 }
 499
 500                 $this->showRedirectedFromHeader();
 501                 $this->showNamespaceHeader();
 502
 503                 # Iterate through the possible ways of constructing the output text.
 504                 # Keep going until $outputDone is set, or we run out of things to do.
 505                 $pass = 0;
 506                 $outputDone = false;
 507                 $this->mParserOutput = false;
 508
 509                 while ( !$outputDone && ++$pass ) {
 510                         switch ( $pass ) {
 511                                 case 1:
 512                                         // Avoid PHP 7.1 warning of passing $this by reference
 513                                         $articlePage = $this;
 514                                         Hooks::run( 'ArticleViewHeader', [ &$articlePage, &$outputDone, &$useParserCache ] );
 515                                         break;
 516                                 case 2:
 517                                         # Early abort if the page doesn't exist
 518                                         if ( !$this->mPage->exists() ) {
 519                                                 wfDebug( __METHOD__ . ": showing missing article\n" );
 520                                                 $this->showMissingArticle();
 521                                                 $this->mPage->doViewUpdates( $user );
 522                                                 return;
 523                                         }
 524
 525                                         # Try the parser cache
 526                                         if ( $useParserCache ) {
 527                                                 $this->mParserOutput = $parserCache->get( $this->mPage, $parserOptions );
 528
 529                                                 if ( $this->mParserOutput !== false ) {
 530                                                         if ( $oldid ) {
 531                                                                 wfDebug( __METHOD__ . ": showing parser cache contents for current rev permalink\n" );
 532                                                                 $this->setOldSubtitle( $oldid );
 533                                                         } else {
 534                                                                 wfDebug( __METHOD__ . ": showing parser cache contents\n" );
 535                                                         }
 536                                                         $outputPage->addParserOutput( $this->mParserOutput );
 537                                                         # Ensure that UI elements requiring revision ID have
 538                                                         # the correct version information.
 539                                                         $outputPage->setRevisionId( $this->mPage->getLatest() );
 540                                                         # Preload timestamp to avoid a DB hit
 541                                                         $cachedTimestamp = $this->mParserOutput->getTimestamp();
 542                                                         if ( $cachedTimestamp !== null ) {
 543                                                                 $outputPage->setRevisionTimestamp( $cachedTimestamp );
 544                                                                 $this->mPage->setTimestamp( $cachedTimestamp );
 545                                                         }
 546                                                         $outputDone = true;
 547                                                 }
 548                                         }
 549                                         break;
 550                                 case 3:
 551                                         # This will set $this->mRevision if needed
 552                                         $this->fetchContentObject();
 553
 554                                         # Are we looking at an old revision
 555                                         if ( $oldid && $this->mRevision ) {
 556                                                 $this->setOldSubtitle( $oldid );
 557
 558                                                 if ( !$this->showDeletedRevisionHeader() ) {
 559                                                         wfDebug( __METHOD__ . ": cannot view deleted revision\n" );
 560                                                         return;
 561                                                 }
 562                                         }
 563
 564                                         # Ensure that UI elements requiring revision ID have
 565                                         # the correct version information.
 566                                         $outputPage->setRevisionId( $this->getRevIdFetched() );
 567                                         # Preload timestamp to avoid a DB hit
 568                                         $outputPage->setRevisionTimestamp( $this->mPage->getTimestamp() );
 569
 570                                         if ( !Hooks::run( 'ArticleContentViewCustom',
 571                                                 [ $this->fetchContentObject(), $this->getTitle(), $outputPage ] )
 572                                         ) {
 573                                                 # Allow extensions do their own custom view for certain pages
 574                                                 $outputDone = true;
 575                                         }
 576                                         break;
 577                                 case 4:
 578                                         # Run the parse, protected by a pool counter
 579                                         wfDebug( __METHOD__ . ": doing uncached parse\n" );
 580
 581                                         $content = $this->getContentObject();
 582                                         $poolArticleView = new PoolWorkArticleView( $this->getPage(), $parserOptions,
 583                                                 $this->getRevIdFetched(), $useParserCache, $content );
 584
 585                                         if ( !$poolArticleView->execute() ) {
 586                                                 $error = $poolArticleView->getError();
 587                                                 if ( $error ) {
 588                                                         $outputPage->clearHTML(); // for release() errors
 589                                                         $outputPage->enableClientCache( false );
 590                                                         $outputPage->setRobotPolicy( 'noindex,nofollow' );
 591
 592                                                         $errortext = $error->getWikiText( false, 'view-pool-error' );
 593                                                         $outputPage->addWikiText( '<div class="errorbox">' . $errortext . '</div>' );
 594                                                 }
 595                                                 # Connection or timeout error
 596                                                 return;
 597                                         }
 598
 599                                         $this->mParserOutput = $poolArticleView->getParserOutput();
 600                                         $outputPage->addParserOutput( $this->mParserOutput );
 601                                         if ( $content->getRedirectTarget() ) {
 602                                                 $outputPage->addSubtitle( "<span id=\"redirectsub\">" .
 603                                                         $this->getContext()->msg( 'redirectpagesub' )->parse() . "</span>" );
 604                                         }
 605
 606                                         # Don't cache a dirty ParserOutput object
 607                                         if ( $poolArticleView->getIsDirty() ) {
 608                                                 $outputPage->setCdnMaxage( 0 );
 609                                                 $outputPage->addHTML( "<!-- parser cache is expired, " .
 610                                                         "sending anyway due to pool overload-->\n" );
 611                                         }
 612
 613                                         $outputDone = true;
 614                                         break;
 615                                 # Should be unreachable, but just in case...
 616                                 default:
 617                                         break 2;
 618                         }
 619                 }
 620
 621                 # Get the ParserOutput actually *displayed* here.
 622                 # Note that $this->mParserOutput is the *current*/oldid version output.
 623                 $pOutput = ( $outputDone instanceof ParserOutput )
 624                         ? $outputDone // object fetched by hook
 625                         : $this->mParserOutput;
 626
 627                 # Adjust title for main page & pages with displaytitle
 628                 if ( $pOutput ) {
 629                         $this->adjustDisplayTitle( $pOutput );
 630                 }
 631
 632                 # For the main page, overwrite the <title> element with the con-
 633                 # tents of 'pagetitle-view-mainpage' instead of the default (if
 634                 # that's not empty).
 635                 # This message always exists because it is in the i18n files
 636                 if ( $this->getTitle()->isMainPage() ) {
 637                         $msg = wfMessage( 'pagetitle-view-mainpage' )->inContentLanguage();
 638                         if ( !$msg->isDisabled() ) {
 639                                 $outputPage->setHTMLTitle( $msg->title( $this->getTitle() )->text() );
 640                         }
 641                 }
 642
 643                 # Use adaptive TTLs for CDN so delayed/failed purges are noticed less often.
 644                 # This could use getTouched(), but that could be scary for major template edits.
 645                 $outputPage->adaptCdnTTL( $this->mPage->getTimestamp(), IExpiringStore::TTL_DAY );
 646
 647                 # Check for any __NOINDEX__ tags on the page using $pOutput
 648                 $policy = $this->getRobotPolicy( 'view', $pOutput );
 649                 $outputPage->setIndexPolicy( $policy['index'] );
 650                 $outputPage->setFollowPolicy( $policy['follow'] );
 651
 652                 $this->showViewFooter();
 653                 $this->mPage->doViewUpdates( $user, $oldid );
 654
 655                 # Load the postEdit module if the user just saved this revision
 656                 # See also EditPage::setPostEditCookie
 657                 $request = $this->getContext()->getRequest();
 658                 $cookieKey = EditPage::POST_EDIT_COOKIE_KEY_PREFIX . $this->getRevIdFetched();
 659                 $postEdit = $request->getCookie( $cookieKey );
 660                 if ( $postEdit ) {
 661                         # Clear the cookie. This also prevents caching of the response.
 662                         $request->response()->clearCookie( $cookieKey );
 663                         $outputPage->addJsConfigVars( 'wgPostEdit', $postEdit );
 664                         $outputPage->addModules( 'mediawiki.action.view.postEdit' );
 665                 }
 666         }
 667
 668         /**
 669          * Adjust title for pages with displaytitle, -{T|}- or language conversion
 670          * @param ParserOutput $pOutput
 671          */
 672         public function adjustDisplayTitle( ParserOutput $pOutput ) {
 673                 # Adjust the title if it was set by displaytitle, -{T|}- or language conversion
 674                 $titleText = $pOutput->getTitleText();
 675                 if ( strval( $titleText ) !== '' ) {
 676                         $this->getContext()->getOutput()->setPageTitle( $titleText );
 677                 }
 678         }
 679
 680         /**
 681          * Show a diff page according to current request variables. For use within
 682          * Article::view() only, other callers should use the DifferenceEngine class.
 683          */
 684         protected function showDiffPage() {
 685                 $request = $this->getContext()->getRequest();
 686                 $user = $this->getContext()->getUser();
 687                 $diff = $request->getVal( 'diff' );
 688                 $rcid = $request->getVal( 'rcid' );
 689                 $diffOnly = $request->getBool( 'diffonly', $user->getOption( 'diffonly' ) );
 690                 $purge = $request->getVal( 'action' ) == 'purge';
 691                 $unhide = $request->getInt( 'unhide' ) == 1;
 692                 $oldid = $this->getOldID();
 693
 694                 $rev = $this->getRevisionFetched();
 695
 696                 if ( !$rev ) {
 697                         $this->getContext()->getOutput()->setPageTitle( wfMessage( 'errorpagetitle' ) );
 698                         $msg = $this->getContext()->msg( 'difference-missing-revision' )
 699                                 ->params( $oldid )
 700                                 ->numParams( 1 )
 701                                 ->parseAsBlock();
 702                         $this->getContext()->getOutput()->addHTML( $msg );
 703                         return;
 704                 }
 705
 706                 $contentHandler = $rev->getContentHandler();
 707                 $de = $contentHandler->createDifferenceEngine(
 708                         $this->getContext(),
 709                         $oldid,
 710                         $diff,
 711                         $rcid,
 712                         $purge,
 713                         $unhide
 714                 );
 715
 716                 // DifferenceEngine directly fetched the revision:
 717                 $this->mRevIdFetched = $de->mNewid;
 718                 $de->showDiffPage( $diffOnly );
 719
 720                 // Run view updates for the newer revision being diffed (and shown
 721                 // below the diff if not $diffOnly).
 722                 list( $old, $new ) = $de->mapDiffPrevNext( $oldid, $diff );
 723                 // New can be false, convert it to 0 - this conveniently means the latest revision
 724                 $this->mPage->doViewUpdates( $user, (int)$new );
 725         }
 726
 727         /**
 728          * Get the robot policy to be used for the current view
 729          * @param string $action The action= GET parameter
 730          * @param ParserOutput|null $pOutput
 731          * @return array The policy that should be set
 732          * @todo actions other than 'view'
 733          */
 734         public function getRobotPolicy( $action, $pOutput = null ) {
 735                 global $wgArticleRobotPolicies, $wgNamespaceRobotPolicies, $wgDefaultRobotPolicy;
 736
 737                 $ns = $this->getTitle()->getNamespace();
 738
 739                 # Don't index user and user talk pages for blocked users (T13443)
 740                 if ( ( $ns == NS_USER || $ns == NS_USER_TALK ) && !$this->getTitle()->isSubpage() ) {
 741                         $specificTarget = null;
 742                         $vagueTarget = null;
 743                         $titleText = $this->getTitle()->getText();
 744                         if ( IP::isValid( $titleText ) ) {
 745                                 $vagueTarget = $titleText;
 746                         } else {
 747                                 $specificTarget = $titleText;
 748                         }
 749                         if ( Block::newFromTarget( $specificTarget, $vagueTarget ) instanceof Block ) {
 750                                 return [
 751                                         'index' => 'noindex',
 752                                         'follow' => 'nofollow'
 753                                 ];
 754                         }
 755                 }
 756
 757                 if ( $this->mPage->getId() === 0 || $this->getOldID() ) {
 758                         # Non-articles (special pages etc), and old revisions
 759                         return [
 760                                 'index' => 'noindex',
 761                                 'follow' => 'nofollow'
 762                         ];
 763                 } elseif ( $this->getContext()->getOutput()->isPrintable() ) {
 764                         # Discourage indexing of printable versions, but encourage following
 765                         return [
 766                                 'index' => 'noindex',
 767                                 'follow' => 'follow'
 768                         ];
 769                 } elseif ( $this->getContext()->getRequest()->getInt( 'curid' ) ) {
 770                         # For ?curid=x urls, disallow indexing
 771                         return [
 772                                 'index' => 'noindex',
 773                                 'follow' => 'follow'
 774                         ];
 775                 }
 776
 777                 # Otherwise, construct the policy based on the various config variables.
 778                 $policy = self::formatRobotPolicy( $wgDefaultRobotPolicy );
 779
 780                 if ( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 781                         # Honour customised robot policies for this namespace
 782                         $policy = array_merge(
 783                                 $policy,
 784                                 self::formatRobotPolicy( $wgNamespaceRobotPolicies[$ns] )
 785                         );
 786                 }
 787                 if ( $this->getTitle()->canUseNoindex() && is_object( $pOutput ) && $pOutput->getIndexPolicy() ) {
 788                         # __INDEX__ and __NOINDEX__ magic words, if allowed. Incorporates
 789                         # a final sanity check that we have really got the parser output.
 790                         $policy = array_merge(
 791                                 $policy,
 792                                 [ 'index' => $pOutput->getIndexPolicy() ]
 793                         );
 794                 }
 795
 796                 if ( isset( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] ) ) {
 797                         # (T16900) site config can override user-defined __INDEX__ or __NOINDEX__
 798                         $policy = array_merge(
 799                                 $policy,
 800                                 self::formatRobotPolicy( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] )
 801                         );
 802                 }
 803
 804                 return $policy;
 805         }
 806
 807         /**
 808          * Converts a String robot policy into an associative array, to allow
 809          * merging of several policies using array_merge().
 810          * @param array|string $policy Returns empty array on null/false/'', transparent
 811          *   to already-converted arrays, converts string.
 812          * @return array 'index' => \<indexpolicy\>, 'follow' => \<followpolicy\>
 813          */
 814         public static function formatRobotPolicy( $policy ) {
 815                 if ( is_array( $policy ) ) {
 816                         return $policy;
 817                 } elseif ( !$policy ) {
 818                         return [];
 819                 }
 820
 821                 $policy = explode( ',', $policy );
 822                 $policy = array_map( 'trim', $policy );
 823
 824                 $arr = [];
 825                 foreach ( $policy as $var ) {
 826                         if ( in_array( $var, [ 'index', 'noindex' ] ) ) {
 827                                 $arr['index'] = $var;
 828                         } elseif ( in_array( $var, [ 'follow', 'nofollow' ] ) ) {
 829                                 $arr['follow'] = $var;
 830                         }
 831                 }
 832
 833                 return $arr;
 834         }
 835
 836         /**
 837          * If this request is a redirect view, send "redirected from" subtitle to
 838          * the output. Returns true if the header was needed, false if this is not
 839          * a redirect view. Handles both local and remote redirects.
 840          *
 841          * @return bool
 842          */
 843         public function showRedirectedFromHeader() {
 844                 global $wgRedirectSources;
 845
 846                 $context = $this->getContext();
 847                 $outputPage = $context->getOutput();
 848                 $request = $context->getRequest();
 849                 $rdfrom = $request->getVal( 'rdfrom' );
 850
 851                 // Construct a URL for the current page view, but with the target title
 852                 $query = $request->getValues();
 853                 unset( $query['rdfrom'] );
 854                 unset( $query['title'] );
 855                 if ( $this->getTitle()->isRedirect() ) {
 856                         // Prevent double redirects
 857                         $query['redirect'] = 'no';
 858                 }
 859                 $redirectTargetUrl = $this->getTitle()->getLinkURL( $query );
 860
 861                 if ( isset( $this->mRedirectedFrom ) ) {
 862                         // Avoid PHP 7.1 warning of passing $this by reference
 863                         $articlePage = $this;
 864
 865                         // This is an internally redirected page view.
 866                         // We'll need a backlink to the source page for navigation.
 867                         if ( Hooks::run( 'ArticleViewRedirect', [ &$articlePage ] ) ) {
 868                                 $redir = Linker::linkKnown(
 869                                         $this->mRedirectedFrom,
 870                                         null,
 871                                         [],
 872                                         [ 'redirect' => 'no' ]
 873                                 );
 874
 875                                 $outputPage->addSubtitle( "<span class=\"mw-redirectedfrom\">" .
 876                                         $context->msg( 'redirectedfrom' )->rawParams( $redir )->parse()
 877                                 . "</span>" );
 878
 879                                 // Add the script to update the displayed URL and
 880                                 // set the fragment if one was specified in the redirect
 881                                 $outputPage->addJsConfigVars( [
 882                                         'wgInternalRedirectTargetUrl' => $redirectTargetUrl,
 883                                 ] );
 884                                 $outputPage->addModules( 'mediawiki.action.view.redirect' );
 885
 886                                 // Add a <link rel="canonical"> tag
 887                                 $outputPage->setCanonicalUrl( $this->getTitle()->getCanonicalURL() );
 888
 889                                 // Tell the output object that the user arrived at this article through a redirect
 890                                 $outputPage->setRedirectedFrom( $this->mRedirectedFrom );
 891
 892                                 return true;
 893                         }
 894                 } elseif ( $rdfrom ) {
 895                         // This is an externally redirected view, from some other wiki.
 896                         // If it was reported from a trusted site, supply a backlink.
 897                         if ( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 898                                 $redir = Linker::makeExternalLink( $rdfrom, $rdfrom );
 899                                 $outputPage->addSubtitle( "<span class=\"mw-redirectedfrom\">" .
 900                                         $context->msg( 'redirectedfrom' )->rawParams( $redir )->parse()
 901                                 . "</span>" );
 902
 903                                 // Add the script to update the displayed URL
 904                                 $outputPage->addJsConfigVars( [
 905                                         'wgInternalRedirectTargetUrl' => $redirectTargetUrl,
 906                                 ] );
 907                                 $outputPage->addModules( 'mediawiki.action.view.redirect' );
 908
 909                                 return true;
 910                         }
 911                 }
 912
 913                 return false;
 914         }
 915
 916         /**
 917          * Show a header specific to the namespace currently being viewed, like
 918          * [[MediaWiki:Talkpagetext]]. For Article::view().
 919          */
 920         public function showNamespaceHeader() {
 921                 if ( $this->getTitle()->isTalkPage() ) {
 922                         if ( !wfMessage( 'talkpageheader' )->isDisabled() ) {
 923                                 $this->getContext()->getOutput()->wrapWikiMsg(
 924                                         "<div class=\"mw-talkpageheader\">\n$1\n</div>",
 925                                         [ 'talkpageheader' ]
 926                                 );
 927                         }
 928                 }
 929         }
 930
 931         /**
 932          * Show the footer section of an ordinary page view
 933          */
 934         public function showViewFooter() {
 935                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 936                 if ( $this->getTitle()->getNamespace() == NS_USER_TALK
 937                         && IP::isValid( $this->getTitle()->getText() )
 938                 ) {
 939                         $this->getContext()->getOutput()->addWikiMsg( 'anontalkpagetext' );
 940                 }
 941
 942                 // Show a footer allowing the user to patrol the shown revision or page if possible
 943                 $patrolFooterShown = $this->showPatrolFooter();
 944
 945                 Hooks::run( 'ArticleViewFooter', [ $this, $patrolFooterShown ] );
 946         }
 947
 948         /**
 949          * If patrol is possible, output a patrol UI box. This is called from the
 950          * footer section of ordinary page views. If patrol is not possible or not
 951          * desired, does nothing.
 952          * Side effect: When the patrol link is build, this method will call
 953          * OutputPage::preventClickjacking() and load mediawiki.page.patrol.ajax.
 954          *
 955          * @return bool
 956          */
 957         public function showPatrolFooter() {
 958                 global $wgUseNPPatrol, $wgUseRCPatrol, $wgUseFilePatrol, $wgEnableAPI, $wgEnableWriteAPI;
 959
 960                 $outputPage = $this->getContext()->getOutput();
 961                 $user = $this->getContext()->getUser();
 962                 $title = $this->getTitle();
 963                 $rc = false;
 964
 965                 if ( !$title->quickUserCan( 'patrol', $user )
 966                         || !( $wgUseRCPatrol || $wgUseNPPatrol
 967                                 || ( $wgUseFilePatrol && $title->inNamespace( NS_FILE ) ) )
 968                 ) {
 969                         // Patrolling is disabled or the user isn't allowed to
 970                         return false;
 971                 }
 972
 973                 if ( $this->mRevision
 974                         && !RecentChange::isInRCLifespan( $this->mRevision->getTimestamp(), 21600 )
 975                 ) {
 976                         // The current revision is already older than what could be in the RC table
 977                         // 6h tolerance because the RC might not be cleaned out regularly
 978                         return false;
 979                 }
 980
 981                 // Check for cached results
 982                 $cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
 983                 $key = $cache->makeKey( 'unpatrollable-page', $title->getArticleID() );
 984                 if ( $cache->get( $key ) ) {
 985                         return false;
 986                 }
 987
 988                 $dbr = wfGetDB( DB_REPLICA );
 989                 $oldestRevisionTimestamp = $dbr->selectField(
 990                         'revision',
 991                         'MIN( rev_timestamp )',
 992                         [ 'rev_page' => $title->getArticleID() ],
 993                         __METHOD__
 994                 );
 995
 996                 // New page patrol: Get the timestamp of the oldest revison which
 997                 // the revision table holds for the given page. Then we look
 998                 // whether it's within the RC lifespan and if it is, we try
 999                 // to get the recentchanges row belonging to that entry
1000                 // (with rc_new = 1).
1001                 $recentPageCreation = false;
1002                 if ( $oldestRevisionTimestamp
1003                         && RecentChange::isInRCLifespan( $oldestRevisionTimestamp, 21600 )
1004                 ) {
1005                         // 6h tolerance because the RC might not be cleaned out regularly
1006                         $recentPageCreation = true;
1007                         $rc = RecentChange::newFromConds(
1008                                 [
1009                                         'rc_new' => 1,
1010                                         'rc_timestamp' => $oldestRevisionTimestamp,
1011                                         'rc_namespace' => $title->getNamespace(),
1012                                         'rc_cur_id' => $title->getArticleID()
1013                                 ],
1014                                 __METHOD__
1015                         );
1016                         if ( $rc ) {
1017                                 // Use generic patrol message for new pages
1018                                 $markPatrolledMsg = wfMessage( 'markaspatrolledtext' );
1019                         }
1020                 }
1021
1022                 // File patrol: Get the timestamp of the latest upload for this page,
1023                 // check whether it is within the RC lifespan and if it is, we try
1024                 // to get the recentchanges row belonging to that entry
1025                 // (with rc_type = RC_LOG, rc_log_type = upload).
1026                 $recentFileUpload = false;
1027                 if ( ( !$rc || $rc->getAttribute( 'rc_patrolled' ) ) && $wgUseFilePatrol
1028                         && $title->getNamespace() === NS_FILE ) {
1029                         // Retrieve timestamp of most recent upload
1030                         $newestUploadTimestamp = $dbr->selectField(
1031                                 'image',
1032                                 'MAX( img_timestamp )',
1033                                 [ 'img_name' => $title->getDBkey() ],
1034                                 __METHOD__
1035                         );
1036                         if ( $newestUploadTimestamp
1037                                 && RecentChange::isInRCLifespan( $newestUploadTimestamp, 21600 )
1038                         ) {
1039                                 // 6h tolerance because the RC might not be cleaned out regularly
1040                                 $recentFileUpload = true;
1041                                 $rc = RecentChange::newFromConds(
1042                                         [
1043                                                 'rc_type' => RC_LOG,
1044                                                 'rc_log_type' => 'upload',
1045                                                 'rc_timestamp' => $newestUploadTimestamp,
1046                                                 'rc_namespace' => NS_FILE,
1047                                                 'rc_cur_id' => $title->getArticleID()
1048                                         ],
1049                                         __METHOD__,
1050                                         [ 'USE INDEX' => 'rc_timestamp' ]
1051                                 );
1052                                 if ( $rc ) {
1053                                         // Use patrol message specific to files
1054                                         $markPatrolledMsg = wfMessage( 'markaspatrolledtext-file' );
1055                                 }
1056                         }
1057                 }
1058
1059                 if ( !$recentPageCreation && !$recentFileUpload ) {
1060                         // Page creation and latest upload (for files) is too old to be in RC
1061
1062                         // We definitely can't patrol so cache the information
1063                         // When a new file version is uploaded, the cache is cleared
1064                         $cache->set( $key, '1' );
1065
1066                         return false;
1067                 }
1068
1069                 if ( !$rc ) {
1070                         // Don't cache: This can be hit if the page gets accessed very fast after
1071                         // its creation / latest upload or in case we have high replica DB lag. In case
1072                         // the revision is too old, we will already return above.
1073                         return false;
1074                 }
1075
1076                 if ( $rc->getAttribute( 'rc_patrolled' ) ) {
1077                         // Patrolled RC entry around
1078
1079                         // Cache the information we gathered above in case we can't patrol
1080                         // Don't cache in case we can patrol as this could change
1081                         $cache->set( $key, '1' );
1082
1083                         return false;
1084                 }
1085
1086                 if ( $rc->getPerformer()->equals( $user ) ) {
1087                         // Don't show a patrol link for own creations/uploads. If the user could
1088                         // patrol them, they already would be patrolled
1089                         return false;
1090                 }
1091
1092                 $outputPage->preventClickjacking();
1093                 if ( $wgEnableAPI && $wgEnableWriteAPI && $user->isAllowed( 'writeapi' ) ) {
1094                         $outputPage->addModules( 'mediawiki.page.patrol.ajax' );
1095                 }
1096
1097                 $link = Linker::linkKnown(
1098                         $title,
1099                         $markPatrolledMsg->escaped(),
1100                         [],
1101                         [
1102                                 'action' => 'markpatrolled',
1103                                 'rcid' => $rc->getAttribute( 'rc_id' ),
1104                         ]
1105                 );
1106
1107                 $outputPage->addHTML(
1108                         "<div class='patrollink' data-mw='interface'>" .
1109                                 wfMessage( 'markaspatrolledlink' )->rawParams( $link )->escaped() .
1110                         '</div>'
1111                 );
1112
1113                 return true;
1114         }
1115
1116         /**
1117          * Purge the cache used to check if it is worth showing the patrol footer
1118          * For example, it is done during re-uploads when file patrol is used.
1119          * @param int $articleID ID of the article to purge
1120          * @since 1.27
1121          */
1122         public static function purgePatrolFooterCache( $articleID ) {
1123                 $cache = MediaWikiServices::getInstance()->getMainWANObjectCache();
1124                 $cache->delete( $cache->makeKey( 'unpatrollable-page', $articleID ) );
1125         }
1126
1127         /**
1128          * Show the error text for a missing article. For articles in the MediaWiki
1129          * namespace, show the default message text. To be called from Article::view().
1130          */
1131         public function showMissingArticle() {
1132                 global $wgSend404Code;
1133
1134                 $outputPage = $this->getContext()->getOutput();
1135                 // Whether the page is a root user page of an existing user (but not a subpage)
1136                 $validUserPage = false;
1137
1138                 $title = $this->getTitle();
1139
1140                 # Show info in user (talk) namespace. Does the user exist? Is he blocked?
1141                 if ( $title->getNamespace() == NS_USER
1142                         || $title->getNamespace() == NS_USER_TALK
1143                 ) {
1144                         $rootPart = explode( '/', $title->getText() )[0];
1145                         $user = User::newFromName( $rootPart, false /* allow IP users */ );
1146                         $ip = User::isIP( $rootPart );
1147                         $block = Block::newFromTarget( $user, $user );
1148
1149                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
1150                                 $outputPage->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n\$1\n</div>",
1151                                         [ 'userpage-userdoesnotexist-view', wfEscapeWikiText( $rootPart ) ] );
1152                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
1153                                 # Show log extract if the user is currently blocked
1154                                 LogEventsList::showLogExtract(
1155                                         $outputPage,
1156                                         'block',
1157                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
1158                                         '',
1159                                         [
1160                                                 'lim' => 1,
1161                                                 'showIfEmpty' => false,
1162                                                 'msgKey' => [
1163                                                         'blocked-notice-logextract',
1164                                                         $user->getName() # Support GENDER in notice
1165                                                 ]
1166                                         ]
1167                                 );
1168                                 $validUserPage = !$title->isSubpage();
1169                         } else {
1170                                 $validUserPage = !$title->isSubpage();
1171                         }
1172                 }
1173
1174                 Hooks::run( 'ShowMissingArticle', [ $this ] );
1175
1176                 # Show delete and move logs if there were any such events.
1177                 # The logging query can DOS the site when bots/crawlers cause 404 floods,
1178                 # so be careful showing this. 404 pages must be cheap as they are hard to cache.
1179                 $cache = MediaWikiServices::getInstance()->getMainObjectStash();
1180                 $key = $cache->makeKey( 'page-recent-delete', md5( $title->getPrefixedText() ) );
1181                 $loggedIn = $this->getContext()->getUser()->isLoggedIn();
1182                 if ( $loggedIn || $cache->get( $key ) ) {
1183                         $logTypes = [ 'delete', 'move', 'protect' ];
1184
1185                         $dbr = wfGetDB( DB_REPLICA );
1186
1187                         $conds = [ 'log_action != ' . $dbr->addQuotes( 'revision' ) ];
1188                         // Give extensions a chance to hide their (unrelated) log entries
1189                         Hooks::run( 'Article::MissingArticleConditions', [ &$conds, $logTypes ] );
1190                         LogEventsList::showLogExtract(
1191                                 $outputPage,
1192                                 $logTypes,
1193                                 $title,
1194                                 '',
1195                                 [
1196                                         'lim' => 10,
1197                                         'conds' => $conds,
1198                                         'showIfEmpty' => false,
1199                                         'msgKey' => [ $loggedIn
1200                                                 ? 'moveddeleted-notice'
1201                                                 : 'moveddeleted-notice-recent'
1202                                         ]
1203                                 ]
1204                         );
1205                 }
1206
1207                 if ( !$this->mPage->hasViewableContent() && $wgSend404Code && !$validUserPage ) {
1208                         // If there's no backing content, send a 404 Not Found
1209                         // for better machine handling of broken links.
1210                         $this->getContext()->getRequest()->response()->statusHeader( 404 );
1211                 }
1212
1213                 // Also apply the robot policy for nonexisting pages (even if a 404 was used for sanity)
1214                 $policy = $this->getRobotPolicy( 'view' );
1215                 $outputPage->setIndexPolicy( $policy['index'] );
1216                 $outputPage->setFollowPolicy( $policy['follow'] );
1217
1218                 $hookResult = Hooks::run( 'BeforeDisplayNoArticleText', [ $this ] );
1219
1220                 if ( !$hookResult ) {
1221                         return;
1222                 }
1223
1224                 # Show error message
1225                 $oldid = $this->getOldID();
1226                 if ( !$oldid && $title->getNamespace() === NS_MEDIAWIKI && $title->hasSourceText() ) {
1227                         $outputPage->addParserOutput( $this->getContentObject()->getParserOutput( $title ) );
1228                 } else {
1229                         if ( $oldid ) {
1230                                 $text = wfMessage( 'missing-revision', $oldid )->plain();
1231                         } elseif ( $title->quickUserCan( 'create', $this->getContext()->getUser() )
1232                                 && $title->quickUserCan( 'edit', $this->getContext()->getUser() )
1233                         ) {
1234                                 $message = $this->getContext()->getUser()->isLoggedIn() ? 'noarticletext' : 'noarticletextanon';
1235                                 $text = wfMessage( $message )->plain();
1236                         } else {
1237                                 $text = wfMessage( 'noarticletext-nopermission' )->plain();
1238                         }
1239
1240                         $dir = $this->getContext()->getLanguage()->getDir();
1241                         $lang = $this->getContext()->getLanguage()->getCode();
1242                         $outputPage->addWikiText( Xml::openElement( 'div', [
1243                                 'class' => "noarticletext mw-content-$dir",
1244                                 'dir' => $dir,
1245                                 'lang' => $lang,
1246                         ] ) . "\n$text\n</div>" );
1247                 }
1248         }
1249
1250         /**
1251          * If the revision requested for view is deleted, check permissions.
1252          * Send either an error message or a warning header to the output.
1253          *
1254          * @return bool True if the view is allowed, false if not.
1255          */
1256         public function showDeletedRevisionHeader() {
1257                 if ( !$this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1258                         // Not deleted
1259                         return true;
1260                 }
1261
1262                 $outputPage = $this->getContext()->getOutput();
1263                 $user = $this->getContext()->getUser();
1264                 // If the user is not allowed to see it...
1265                 if ( !$this->mRevision->userCan( Revision::DELETED_TEXT, $user ) ) {
1266                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1267                                 'rev-deleted-text-permission' );
1268
1269                         return false;
1270                 // If the user needs to confirm that they want to see it...
1271                 } elseif ( $this->getContext()->getRequest()->getInt( 'unhide' ) != 1 ) {
1272                         # Give explanation and add a link to view the revision...
1273                         $oldid = intval( $this->getOldID() );
1274                         $link = $this->getTitle()->getFullURL( "oldid={$oldid}&unhide=1" );
1275                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1276                                 'rev-suppressed-text-unhide' : 'rev-deleted-text-unhide';
1277                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1278                                 [ $msg, $link ] );
1279
1280                         return false;
1281                 // We are allowed to see...
1282                 } else {
1283                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1284                                 'rev-suppressed-text-view' : 'rev-deleted-text-view';
1285                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", $msg );
1286
1287                         return true;
1288                 }
1289         }
1290
1291         /**
1292          * Generate the navigation links when browsing through an article revisions
1293          * It shows the information as:
1294          *   Revision as of \<date\>; view current revision
1295          *   \<- Previous version | Next Version -\>
1296          *
1297          * @param int $oldid Revision ID of this article revision
1298          */
1299         public function setOldSubtitle( $oldid = 0 ) {
1300                 // Avoid PHP 7.1 warning of passing $this by reference
1301                 $articlePage = $this;
1302
1303                 if ( !Hooks::run( 'DisplayOldSubtitle', [ &$articlePage, &$oldid ] ) ) {
1304                         return;
1305                 }
1306
1307                 $context = $this->getContext();
1308                 $unhide = $context->getRequest()->getInt( 'unhide' ) == 1;
1309
1310                 # Cascade unhide param in links for easy deletion browsing
1311                 $extraParams = [];
1312                 if ( $unhide ) {
1313                         $extraParams['unhide'] = 1;
1314                 }
1315
1316                 if ( $this->mRevision && $this->mRevision->getId() === $oldid ) {
1317                         $revision = $this->mRevision;
1318                 } else {
1319                         $revision = Revision::newFromId( $oldid );
1320                 }
1321
1322                 $timestamp = $revision->getTimestamp();
1323
1324                 $current = ( $oldid == $this->mPage->getLatest() );
1325                 $language = $context->getLanguage();
1326                 $user = $context->getUser();
1327
1328                 $td = $language->userTimeAndDate( $timestamp, $user );
1329                 $tddate = $language->userDate( $timestamp, $user );
1330                 $tdtime = $language->userTime( $timestamp, $user );
1331
1332                 # Show user links if allowed to see them. If hidden, then show them only if requested...
1333                 $userlinks = Linker::revUserTools( $revision, !$unhide );
1334
1335                 $infomsg = $current && !$context->msg( 'revision-info-current' )->isDisabled()
1336                         ? 'revision-info-current'
1337                         : 'revision-info';
1338
1339                 $outputPage = $context->getOutput();
1340                 $revisionInfo = "<div id=\"mw-{$infomsg}\">" .
1341                         $context->msg( $infomsg, $td )
1342                                 ->rawParams( $userlinks )
1343                                 ->params( $revision->getId(), $tddate, $tdtime, $revision->getUserText() )
1344                                 ->rawParams( Linker::revComment( $revision, true, true ) )
1345                                 ->parse() .
1346                         "</div>";
1347
1348                 $lnk = $current
1349                         ? $context->msg( 'currentrevisionlink' )->escaped()
1350                         : Linker::linkKnown(
1351                                 $this->getTitle(),
1352                                 $context->msg( 'currentrevisionlink' )->escaped(),
1353                                 [],
1354                                 $extraParams
1355                         );
1356                 $curdiff = $current
1357                         ? $context->msg( 'diff' )->escaped()
1358                         : Linker::linkKnown(
1359                                 $this->getTitle(),
1360                                 $context->msg( 'diff' )->escaped(),
1361                                 [],
1362                                 [
1363                                         'diff' => 'cur',
1364                                         'oldid' => $oldid
1365                                 ] + $extraParams
1366                         );
1367                 $prev = $this->getTitle()->getPreviousRevisionID( $oldid );
1368                 $prevlink = $prev
1369                         ? Linker::linkKnown(
1370                                 $this->getTitle(),
1371                                 $context->msg( 'previousrevision' )->escaped(),
1372                                 [],
1373                                 [
1374                                         'direction' => 'prev',
1375                                         'oldid' => $oldid
1376                                 ] + $extraParams
1377                         )
1378                         : $context->msg( 'previousrevision' )->escaped();
1379                 $prevdiff = $prev
1380                         ? Linker::linkKnown(
1381                                 $this->getTitle(),
1382                                 $context->msg( 'diff' )->escaped(),
1383                                 [],
1384                                 [
1385                                         'diff' => 'prev',
1386                                         'oldid' => $oldid
1387                                 ] + $extraParams
1388                         )
1389                         : $context->msg( 'diff' )->escaped();
1390                 $nextlink = $current
1391                         ? $context->msg( 'nextrevision' )->escaped()
1392                         : Linker::linkKnown(
1393                                 $this->getTitle(),
1394                                 $context->msg( 'nextrevision' )->escaped(),
1395                                 [],
1396                                 [
1397                                         'direction' => 'next',
1398                                         'oldid' => $oldid
1399                                 ] + $extraParams
1400                         );
1401                 $nextdiff = $current
1402                         ? $context->msg( 'diff' )->escaped()
1403                         : Linker::linkKnown(
1404                                 $this->getTitle(),
1405                                 $context->msg( 'diff' )->escaped(),
1406                                 [],
1407                                 [
1408                                         'diff' => 'next',
1409                                         'oldid' => $oldid
1410                                 ] + $extraParams
1411                         );
1412
1413                 $cdel = Linker::getRevDeleteLink( $user, $revision, $this->getTitle() );
1414                 if ( $cdel !== '' ) {
1415                         $cdel .= ' ';
1416                 }
1417
1418                 // the outer div is need for styling the revision info and nav in MobileFrontend
1419                 $outputPage->addSubtitle( "<div class=\"mw-revision\">" . $revisionInfo .
1420                         "<div id=\"mw-revision-nav\">" . $cdel .
1421                         $context->msg( 'revision-nav' )->rawParams(
1422                                 $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff
1423                         )->escaped() . "</div></div>" );
1424         }
1425
1426         /**
1427          * Return the HTML for the top of a redirect page
1428          *
1429          * Chances are you should just be using the ParserOutput from
1430          * WikitextContent::getParserOutput instead of calling this for redirects.
1431          *
1432          * @param Title|array $target Destination(s) to redirect
1433          * @param bool $appendSubtitle [optional]
1434          * @param bool $forceKnown Should the image be shown as a bluelink regardless of existence?
1435          * @return string Containing HTML with redirect link
1436          *
1437          * @deprecated since 1.30
1438          */
1439         public function viewRedirect( $target, $appendSubtitle = true, $forceKnown = false ) {
1440                 $lang = $this->getTitle()->getPageLanguage();
1441                 $out = $this->getContext()->getOutput();
1442                 if ( $appendSubtitle ) {
1443                         $out->addSubtitle( wfMessage( 'redirectpagesub' ) );
1444                 }
1445                 $out->addModuleStyles( 'mediawiki.action.view.redirectPage' );
1446                 return static::getRedirectHeaderHtml( $lang, $target, $forceKnown );
1447         }
1448
1449         /**
1450          * Return the HTML for the top of a redirect page
1451          *
1452          * Chances are you should just be using the ParserOutput from
1453          * WikitextContent::getParserOutput instead of calling this for redirects.
1454          *
1455          * @since 1.23
1456          * @param Language $lang
1457          * @param Title|array $target Destination(s) to redirect
1458          * @param bool $forceKnown Should the image be shown as a bluelink regardless of existence?
1459          * @return string Containing HTML with redirect link
1460          */
1461         public static function getRedirectHeaderHtml( Language $lang, $target, $forceKnown = false ) {
1462                 if ( !is_array( $target ) ) {
1463                         $target = [ $target ];
1464                 }
1465
1466                 $html = '<ul class="redirectText">';
1467                 /** @var Title $title */
1468                 foreach ( $target as $title ) {
1469                         $html .= '<li>' . Linker::link(
1470                                 $title,
1471                                 htmlspecialchars( $title->getFullText() ),
1472                                 [],
1473                                 // Make sure wiki page redirects are not followed
1474                                 $title->isRedirect() ? [ 'redirect' => 'no' ] : [],
1475                                 ( $forceKnown ? [ 'known', 'noclasses' ] : [] )
1476                         ) . '</li>';
1477                 }
1478                 $html .= '</ul>';
1479
1480                 $redirectToText = wfMessage( 'redirectto' )->inLanguage( $lang )->escaped();
1481
1482                 return '<div class="redirectMsg">' .
1483                         '<p>' . $redirectToText . '</p>' .
1484                         $html .
1485                         '</div>';
1486         }
1487
1488         /**
1489          * Adds help link with an icon via page indicators.
1490          * Link target can be overridden by a local message containing a wikilink:
1491          * the message key is: 'namespace-' + namespace number + '-helppage'.
1492          * @param string $to Target MediaWiki.org page title or encoded URL.
1493          * @param bool $overrideBaseUrl Whether $url is a full URL, to avoid MW.o.
1494          * @since 1.25
1495          */
1496         public function addHelpLink( $to, $overrideBaseUrl = false ) {
1497                 $msg = wfMessage(
1498                         'namespace-' . $this->getTitle()->getNamespace() . '-helppage'
1499                 );
1500
1501                 $out = $this->getContext()->getOutput();
1502                 if ( !$msg->isDisabled() ) {
1503                         $helpUrl = Skin::makeUrl( $msg->plain() );
1504                         $out->addHelpLink( $helpUrl, true );
1505                 } else {
1506                         $out->addHelpLink( $to, $overrideBaseUrl );
1507                 }
1508         }
1509
1510         /**
1511          * Handle action=render
1512          */
1513         public function render() {
1514                 $this->getContext()->getRequest()->response()->header( 'X-Robots-Tag: noindex' );
1515                 $this->getContext()->getOutput()->setArticleBodyOnly( true );
1516                 $this->getContext()->getOutput()->enableSectionEditLinks( false );
1517                 $this->view();
1518         }
1519
1520         /**
1521          * action=protect handler
1522          */
1523         public function protect() {
1524                 $form = new ProtectionForm( $this );
1525                 $form->execute();
1526         }
1527
1528         /**
1529          * action=unprotect handler (alias)
1530          */
1531         public function unprotect() {
1532                 $this->protect();
1533         }
1534
1535         /**
1536          * UI entry point for page deletion
1537          */
1538         public function delete() {
1539                 # This code desperately needs to be totally rewritten
1540
1541                 $title = $this->getTitle();
1542                 $context = $this->getContext();
1543                 $user = $context->getUser();
1544                 $request = $context->getRequest();
1545
1546                 # Check permissions
1547                 $permissionErrors = $title->getUserPermissionsErrors( 'delete', $user );
1548                 if ( count( $permissionErrors ) ) {
1549                         throw new PermissionsError( 'delete', $permissionErrors );
1550                 }
1551
1552                 # Read-only check...
1553                 if ( wfReadOnly() ) {
1554                         throw new ReadOnlyError;
1555                 }
1556
1557                 # Better double-check that it hasn't been deleted yet!
1558                 $this->mPage->loadPageData(
1559                         $request->wasPosted() ? WikiPage::READ_LATEST : WikiPage::READ_NORMAL
1560                 );
1561                 if ( !$this->mPage->exists() ) {
1562                         $deleteLogPage = new LogPage( 'delete' );
1563                         $outputPage = $context->getOutput();
1564                         $outputPage->setPageTitle( $context->msg( 'cannotdelete-title', $title->getPrefixedText() ) );
1565                         $outputPage->wrapWikiMsg( "<div class=\"error mw-error-cannotdelete\">\n$1\n</div>",
1566                                         [ 'cannotdelete', wfEscapeWikiText( $title->getPrefixedText() ) ]
1567                                 );
1568                         $outputPage->addHTML(
1569                                 Xml::element( 'h2', null, $deleteLogPage->getName()->text() )
1570                         );
1571                         LogEventsList::showLogExtract(
1572                                 $outputPage,
1573                                 'delete',
1574                                 $title
1575                         );
1576
1577                         return;
1578                 }
1579
1580                 $deleteReasonList = $request->getText( 'wpDeleteReasonList', 'other' );
1581                 $deleteReason = $request->getText( 'wpReason' );
1582
1583                 if ( $deleteReasonList == 'other' ) {
1584                         $reason = $deleteReason;
1585                 } elseif ( $deleteReason != '' ) {
1586                         // Entry from drop down menu + additional comment
1587                         $colonseparator = wfMessage( 'colon-separator' )->inContentLanguage()->text();
1588                         $reason = $deleteReasonList . $colonseparator . $deleteReason;
1589                 } else {
1590                         $reason = $deleteReasonList;
1591                 }
1592
1593                 if ( $request->wasPosted() && $user->matchEditToken( $request->getVal( 'wpEditToken' ),
1594                         [ 'delete', $this->getTitle()->getPrefixedText() ] )
1595                 ) {
1596                         # Flag to hide all contents of the archived revisions
1597                         $suppress = $request->getCheck( 'wpSuppress' ) && $user->isAllowed( 'suppressrevision' );
1598
1599                         $this->doDelete( $reason, $suppress );
1600
1601                         WatchAction::doWatchOrUnwatch( $request->getCheck( 'wpWatch' ), $title, $user );
1602
1603                         return;
1604                 }
1605
1606                 // Generate deletion reason
1607                 $hasHistory = false;
1608                 if ( !$reason ) {
1609                         try {
1610                                 $reason = $this->generateReason( $hasHistory );
1611                         } catch ( Exception $e ) {
1612                                 # if a page is horribly broken, we still want to be able to
1613                                 # delete it. So be lenient about errors here.
1614                                 wfDebug( "Error while building auto delete summary: $e" );
1615                                 $reason = '';
1616                         }
1617                 }
1618
1619                 // If the page has a history, insert a warning
1620                 if ( $hasHistory ) {
1621                         $title = $this->getTitle();
1622
1623                         // The following can use the real revision count as this is only being shown for users
1624                         // that can delete this page.
1625                         // This, as a side-effect, also makes sure that the following query isn't being run for
1626                         // pages with a larger history, unless the user has the 'bigdelete' right
1627                         // (and is about to delete this page).
1628                         $dbr = wfGetDB( DB_REPLICA );
1629                         $revisions = $edits = (int)$dbr->selectField(
1630                                 'revision',
1631                                 'COUNT(rev_page)',
1632                                 [ 'rev_page' => $title->getArticleID() ],
1633                                 __METHOD__
1634                         );
1635
1636                         // @todo FIXME: i18n issue/patchwork message
1637                         $context->getOutput()->addHTML(
1638                                 '<strong class="mw-delete-warning-revisions">' .
1639                                 $context->msg( 'historywarning' )->numParams( $revisions )->parse() .
1640                                 $context->msg( 'word-separator' )->escaped() . Linker::linkKnown( $title,
1641                                         $context->msg( 'history' )->escaped(),
1642                                         [],
1643                                         [ 'action' => 'history' ] ) .
1644                                 '</strong>'
1645                         );
1646
1647                         if ( $title->isBigDeletion() ) {
1648                                 global $wgDeleteRevisionsLimit;
1649                                 $context->getOutput()->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
1650                                         [
1651                                                 'delete-warning-toobig',
1652                                                 $context->getLanguage()->formatNum( $wgDeleteRevisionsLimit )
1653                                         ]
1654                                 );
1655                         }
1656                 }
1657
1658                 $this->confirmDelete( $reason );
1659         }
1660
1661         /**
1662          * Output deletion confirmation dialog
1663          * @todo FIXME: Move to another file?
1664          * @param string $reason Prefilled reason
1665          */
1666         public function confirmDelete( $reason ) {
1667                 wfDebug( "Article::confirmDelete\n" );
1668
1669                 $title = $this->getTitle();
1670                 $ctx = $this->getContext();
1671                 $outputPage = $ctx->getOutput();
1672                 $outputPage->setPageTitle( wfMessage( 'delete-confirm', $title->getPrefixedText() ) );
1673                 $outputPage->addBacklinkSubtitle( $title );
1674                 $outputPage->setRobotPolicy( 'noindex,nofollow' );
1675
1676                 $backlinkCache = $title->getBacklinkCache();
1677                 if ( $backlinkCache->hasLinks( 'pagelinks' ) || $backlinkCache->hasLinks( 'templatelinks' ) ) {
1678                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1679                                 'deleting-backlinks-warning' );
1680                 }
1681
1682                 $subpageQueryLimit = 51;
1683                 $subpages = $title->getSubpages( $subpageQueryLimit );
1684                 $subpageCount = count( $subpages );
1685                 if ( $subpageCount > 0 ) {
1686                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1687                                 [ 'deleting-subpages-warning', Message::numParam( $subpageCount ) ] );
1688                 }
1689                 $outputPage->addWikiMsg( 'confirmdeletetext' );
1690
1691                 Hooks::run( 'ArticleConfirmDelete', [ $this, $outputPage, &$reason ] );
1692
1693                 $user = $this->getContext()->getUser();
1694                 $checkWatch = $user->getBoolOption( 'watchdeletion' ) || $user->isWatched( $title );
1695
1696                 $outputPage->enableOOUI();
1697
1698                 $options = Xml::listDropDownOptions(
1699                         $ctx->msg( 'deletereason-dropdown' )->inContentLanguage()->text(),
1700                         [ 'other' => $ctx->msg( 'deletereasonotherlist' )->inContentLanguage()->text() ]
1701                 );
1702                 $options = Xml::listDropDownOptionsOoui( $options );
1703
1704                 $fields[] = new OOUI\FieldLayout(
1705                         new OOUI\DropdownInputWidget( [
1706                                 'name' => 'wpDeleteReasonList',
1707                                 'inputId' => 'wpDeleteReasonList',
1708                                 'tabIndex' => 1,
1709                                 'infusable' => true,
1710                                 'value' => '',
1711                                 'options' => $options
1712                         ] ),
1713                         [
1714                                 'label' => $ctx->msg( 'deletecomment' )->text(),
1715                                 'align' => 'top',
1716                         ]
1717                 );
1718
1719                 $fields[] = new OOUI\FieldLayout(
1720                         new OOUI\TextInputWidget( [
1721                                 'name' => 'wpReason',
1722                                 'inputId' => 'wpReason',
1723                                 'tabIndex' => 2,
1724                                 'maxLength' => 255,
1725                                 'infusable' => true,
1726                                 'value' => $reason,
1727                                 'autofocus' => true,
1728                         ] ),
1729                         [
1730                                 'label' => $ctx->msg( 'deleteotherreason' )->text(),
1731                                 'align' => 'top',
1732                         ]
1733                 );
1734
1735                 if ( $user->isLoggedIn() ) {
1736                         $fields[] = new OOUI\FieldLayout(
1737                                 new OOUI\CheckboxInputWidget( [
1738                                         'name' => 'wpWatch',
1739                                         'inputId' => 'wpWatch',
1740                                         'tabIndex' => 3,
1741                                         'selected' => $checkWatch,
1742                                 ] ),
1743                                 [
1744                                         'label' => $ctx->msg( 'watchthis' )->text(),
1745                                         'align' => 'inline',
1746                                         'infusable' => true,
1747                                 ]
1748                         );
1749                 }
1750
1751                 if ( $user->isAllowed( 'suppressrevision' ) ) {
1752                         $fields[] = new OOUI\FieldLayout(
1753                                 new OOUI\CheckboxInputWidget( [
1754                                         'name' => 'wpSuppress',
1755                                         'inputId' => 'wpSuppress',
1756                                         'tabIndex' => 4,
1757                                 ] ),
1758                                 [
1759                                         'label' => $ctx->msg( 'revdelete-suppress' )->text(),
1760                                         'align' => 'inline',
1761                                         'infusable' => true,
1762                                 ]
1763                         );
1764                 }
1765
1766                 $fields[] = new OOUI\FieldLayout(
1767                         new OOUI\ButtonInputWidget( [
1768                                 'name' => 'wpConfirmB',
1769                                 'inputId' => 'wpConfirmB',
1770                                 'tabIndex' => 5,
1771                                 'value' => $ctx->msg( 'deletepage' )->text(),
1772                                 'label' => $ctx->msg( 'deletepage' )->text(),
1773                                 'flags' => [ 'primary', 'destructive' ],
1774                                 'type' => 'submit',
1775                         ] ),
1776                         [
1777                                 'align' => 'top',
1778                         ]
1779                 );
1780
1781                 $fieldset = new OOUI\FieldsetLayout( [
1782                         'label' => $ctx->msg( 'delete-legend' )->text(),
1783                         'id' => 'mw-delete-table',
1784                         'items' => $fields,
1785                 ] );
1786
1787                 $form = new OOUI\FormLayout( [
1788                         'method' => 'post',
1789                         'action' => $title->getLocalURL( 'action=delete' ),
1790                         'id' => 'deleteconfirm',
1791                 ] );
1792                 $form->appendContent(
1793                         $fieldset,
1794                         new OOUI\HtmlSnippet(
1795                                 Html::hidden( 'wpEditToken', $user->getEditToken( [ 'delete', $title->getPrefixedText() ] ) )
1796                         )
1797                 );
1798
1799                 $outputPage->addHTML(
1800                         new OOUI\PanelLayout( [
1801                                 'classes' => [ 'deletepage-wrapper' ],
1802                                 'expanded' => false,
1803                                 'padded' => true,
1804                                 'framed' => true,
1805                                 'content' => $form,
1806                         ] )
1807                 );
1808
1809                 if ( $user->isAllowed( 'editinterface' ) ) {
1810                         $link = Linker::linkKnown(
1811                                 $ctx->msg( 'deletereason-dropdown' )->inContentLanguage()->getTitle(),
1812                                 wfMessage( 'delete-edit-reasonlist' )->escaped(),
1813                                 [],
1814                                 [ 'action' => 'edit' ]
1815                         );
1816                         $outputPage->addHTML( '<p class="mw-delete-editreasons">' . $link . '</p>' );
1817                 }
1818
1819                 $deleteLogPage = new LogPage( 'delete' );
1820                 $outputPage->addHTML( Xml::element( 'h2', null, $deleteLogPage->getName()->text() ) );
1821                 LogEventsList::showLogExtract( $outputPage, 'delete', $title );
1822         }
1823
1824         /**
1825          * Perform a deletion and output success or failure messages
1826          * @param string $reason
1827          * @param bool $suppress
1828          */
1829         public function doDelete( $reason, $suppress = false ) {
1830                 $error = '';
1831                 $context = $this->getContext();
1832                 $outputPage = $context->getOutput();
1833                 $user = $context->getUser();
1834                 $status = $this->mPage->doDeleteArticleReal( $reason, $suppress, 0, true, $error, $user );
1835
1836                 if ( $status->isGood() ) {
1837                         $deleted = $this->getTitle()->getPrefixedText();
1838
1839                         $outputPage->setPageTitle( wfMessage( 'actioncomplete' ) );
1840                         $outputPage->setRobotPolicy( 'noindex,nofollow' );
1841
1842                         $loglink = '[[Special:Log/delete|' . wfMessage( 'deletionlog' )->text() . ']]';
1843
1844                         $outputPage->addWikiMsg( 'deletedtext', wfEscapeWikiText( $deleted ), $loglink );
1845
1846                         Hooks::run( 'ArticleDeleteAfterSuccess', [ $this->getTitle(), $outputPage ] );
1847
1848                         $outputPage->returnToMain( false );
1849                 } else {
1850                         $outputPage->setPageTitle(
1851                                 wfMessage( 'cannotdelete-title',
1852                                         $this->getTitle()->getPrefixedText() )
1853                         );
1854
1855                         if ( $error == '' ) {
1856                                 $outputPage->addWikiText(
1857                                         "<div class=\"error mw-error-cannotdelete\">\n" . $status->getWikiText() . "\n</div>"
1858                                 );
1859                                 $deleteLogPage = new LogPage( 'delete' );
1860                                 $outputPage->addHTML( Xml::element( 'h2', null, $deleteLogPage->getName()->text() ) );
1861
1862                                 LogEventsList::showLogExtract(
1863                                         $outputPage,
1864                                         'delete',
1865                                         $this->getTitle()
1866                                 );
1867                         } else {
1868                                 $outputPage->addHTML( $error );
1869                         }
1870                 }
1871         }
1872
1873         /* Caching functions */
1874
1875         /**
1876          * checkLastModified returns true if it has taken care of all
1877          * output to the client that is necessary for this request.
1878          * (that is, it has sent a cached version of the page)
1879          *
1880          * @return bool True if cached version send, false otherwise
1881          */
1882         protected function tryFileCache() {
1883                 static $called = false;
1884
1885                 if ( $called ) {
1886                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
1887                         return false;
1888                 }
1889
1890                 $called = true;
1891                 if ( $this->isFileCacheable() ) {
1892                         $cache = new HTMLFileCache( $this->getTitle(), 'view' );
1893                         if ( $cache->isCacheGood( $this->mPage->getTouched() ) ) {
1894                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
1895                                 $cache->loadFromFileCache( $this->getContext() );
1896                                 return true;
1897                         } else {
1898                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
1899                                 ob_start( [ &$cache, 'saveToFileCache' ] );
1900                         }
1901                 } else {
1902                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
1903                 }
1904
1905                 return false;
1906         }
1907
1908         /**
1909          * Check if the page can be cached
1910          * @param int $mode One of the HTMLFileCache::MODE_* constants (since 1.28)
1911          * @return bool
1912          */
1913         public function isFileCacheable( $mode = HTMLFileCache::MODE_NORMAL ) {
1914                 $cacheable = false;
1915
1916                 if ( HTMLFileCache::useFileCache( $this->getContext(), $mode ) ) {
1917                         $cacheable = $this->mPage->getId()
1918                                 && !$this->mRedirectedFrom && !$this->getTitle()->isRedirect();
1919                         // Extension may have reason to disable file caching on some pages.
1920                         if ( $cacheable ) {
1921                                 // Avoid PHP 7.1 warning of passing $this by reference
1922                                 $articlePage = $this;
1923                                 $cacheable = Hooks::run( 'IsFileCacheable', [ &$articlePage ] );
1924                         }
1925                 }
1926
1927                 return $cacheable;
1928         }
1929
1930         /**#@-*/
1931
1932         /**
1933          * Lightweight method to get the parser output for a page, checking the parser cache
1934          * and so on. Doesn't consider most of the stuff that WikiPage::view is forced to
1935          * consider, so it's not appropriate to use there.
1936          *
1937          * @since 1.16 (r52326) for LiquidThreads
1938          *
1939          * @param int|null $oldid Revision ID or null
1940          * @param User $user The relevant user
1941          * @return ParserOutput|bool ParserOutput or false if the given revision ID is not found
1942          */
1943         public function getParserOutput( $oldid = null, User $user = null ) {
1944                 // XXX: bypasses mParserOptions and thus setParserOptions()
1945
1946                 if ( $user === null ) {
1947                         $parserOptions = $this->getParserOptions();
1948                 } else {
1949                         $parserOptions = $this->mPage->makeParserOptions( $user );
1950                 }
1951
1952                 return $this->mPage->getParserOutput( $parserOptions, $oldid );
1953         }
1954
1955         /**
1956          * Override the ParserOptions used to render the primary article wikitext.
1957          *
1958          * @param ParserOptions $options
1959          * @throws MWException If the parser options where already initialized.
1960          */
1961         public function setParserOptions( ParserOptions $options ) {
1962                 if ( $this->mParserOptions ) {
1963                         throw new MWException( "can't change parser options after they have already been set" );
1964                 }
1965
1966                 // clone, so if $options is modified later, it doesn't confuse the parser cache.
1967                 $this->mParserOptions = clone $options;
1968         }
1969
1970         /**
1971          * Get parser options suitable for rendering the primary article wikitext
1972          * @return ParserOptions
1973          */
1974         public function getParserOptions() {
1975                 if ( !$this->mParserOptions ) {
1976                         $this->mParserOptions = $this->mPage->makeParserOptions( $this->getContext() );
1977                 }
1978                 // Clone to allow modifications of the return value without affecting cache
1979                 return clone $this->mParserOptions;
1980         }
1981
1982         /**
1983          * Sets the context this Article is executed in
1984          *
1985          * @param IContextSource $context
1986          * @since 1.18
1987          */
1988         public function setContext( $context ) {
1989                 $this->mContext = $context;
1990         }
1991
1992         /**
1993          * Gets the context this Article is executed in
1994          *
1995          * @return IContextSource
1996          * @since 1.18
1997          */
1998         public function getContext() {
1999                 if ( $this->mContext instanceof IContextSource ) {
2000                         return $this->mContext;
2001                 } else {
2002                         wfDebug( __METHOD__ . " called and \$mContext is null. " .
2003                                 "Return RequestContext::getMain(); for sanity\n" );
2004                         return RequestContext::getMain();
2005                 }
2006         }
2007
2008         /**
2009          * Use PHP's magic __get handler to handle accessing of
2010          * raw WikiPage fields for backwards compatibility.
2011          *
2012          * @param string $fname Field name
2013          * @return mixed
2014          */
2015         public function __get( $fname ) {
2016                 if ( property_exists( $this->mPage, $fname ) ) {
2017                         # wfWarn( "Access to raw $fname field " . __CLASS__ );
2018                         return $this->mPage->$fname;
2019                 }
2020                 trigger_error( 'Inaccessible property via __get(): ' . $fname, E_USER_NOTICE );
2021         }
2022
2023         /**
2024          * Use PHP's magic __set handler to handle setting of
2025          * raw WikiPage fields for backwards compatibility.
2026          *
2027          * @param string $fname Field name
2028          * @param mixed $fvalue New value
2029          */
2030         public function __set( $fname, $fvalue ) {
2031                 if ( property_exists( $this->mPage, $fname ) ) {
2032                         # wfWarn( "Access to raw $fname field of " . __CLASS__ );
2033                         $this->mPage->$fname = $fvalue;
2034                 // Note: extensions may want to toss on new fields
2035                 } elseif ( !in_array( $fname, [ 'mContext', 'mPage' ] ) ) {
2036                         $this->mPage->$fname = $fvalue;
2037                 } else {
2038                         trigger_error( 'Inaccessible property via __set(): ' . $fname, E_USER_NOTICE );
2039                 }
2040         }
2041
2042         /**
2043          * Call to WikiPage function for backwards compatibility.
2044          * @see WikiPage::checkFlags
2045          */
2046         public function checkFlags( $flags ) {
2047                 return $this->mPage->checkFlags( $flags );
2048         }
2049
2050         /**
2051          * Call to WikiPage function for backwards compatibility.
2052          * @see WikiPage::checkTouched
2053          */
2054         public function checkTouched() {
2055                 return $this->mPage->checkTouched();
2056         }
2057
2058         /**
2059          * Call to WikiPage function for backwards compatibility.
2060          * @see WikiPage::clearPreparedEdit
2061          */
2062         public function clearPreparedEdit() {
2063                 $this->mPage->clearPreparedEdit();
2064         }
2065
2066         /**
2067          * Call to WikiPage function for backwards compatibility.
2068          * @see WikiPage::doDeleteArticleReal
2069          */
2070         public function doDeleteArticleReal(
2071                 $reason, $suppress = false, $u1 = null, $u2 = null, &$error = '', User $user = null,
2072                 $tags = []
2073         ) {
2074                 return $this->mPage->doDeleteArticleReal(
2075                         $reason, $suppress, $u1, $u2, $error, $user, $tags
2076                 );
2077         }
2078
2079         /**
2080          * Call to WikiPage function for backwards compatibility.
2081          * @see WikiPage::doDeleteUpdates
2082          */
2083         public function doDeleteUpdates( $id, Content $content = null ) {
2084                 return $this->mPage->doDeleteUpdates( $id, $content );
2085         }
2086
2087         /**
2088          * Call to WikiPage function for backwards compatibility.
2089          * @deprecated since 1.29. Use WikiPage::doEditContent() directly instead
2090          * @see WikiPage::doEditContent
2091          */
2092         public function doEditContent( Content $content, $summary, $flags = 0, $baseRevId = false,
2093                 User $user = null, $serialFormat = null
2094         ) {
2095                 wfDeprecated( __METHOD__, '1.29' );
2096                 return $this->mPage->doEditContent( $content, $summary, $flags, $baseRevId,
2097                         $user, $serialFormat
2098                 );
2099         }
2100
2101         /**
2102          * Call to WikiPage function for backwards compatibility.
2103          * @see WikiPage::doEditUpdates
2104          */
2105         public function doEditUpdates( Revision $revision, User $user, array $options = [] ) {
2106                 return $this->mPage->doEditUpdates( $revision, $user, $options );
2107         }
2108
2109         /**
2110          * Call to WikiPage function for backwards compatibility.
2111          * @see WikiPage::doPurge
2112          * @note In 1.28 (and only 1.28), this took a $flags parameter that
2113          *  controlled how much purging was done.
2114          */
2115         public function doPurge() {
2116                 return $this->mPage->doPurge();
2117         }
2118
2119         /**
2120          * Call to WikiPage function for backwards compatibility.
2121          * @see WikiPage::getLastPurgeTimestamp
2122          * @deprecated since 1.29
2123          */
2124         public function getLastPurgeTimestamp() {
2125                 wfDeprecated( __METHOD__, '1.29' );
2126                 return $this->mPage->getLastPurgeTimestamp();
2127         }
2128
2129         /**
2130          * Call to WikiPage function for backwards compatibility.
2131          * @see WikiPage::doViewUpdates
2132          */
2133         public function doViewUpdates( User $user, $oldid = 0 ) {
2134                 $this->mPage->doViewUpdates( $user, $oldid );
2135         }
2136
2137         /**
2138          * Call to WikiPage function for backwards compatibility.
2139          * @see WikiPage::exists
2140          */
2141         public function exists() {
2142                 return $this->mPage->exists();
2143         }
2144
2145         /**
2146          * Call to WikiPage function for backwards compatibility.
2147          * @see WikiPage::followRedirect
2148          */
2149         public function followRedirect() {
2150                 return $this->mPage->followRedirect();
2151         }
2152
2153         /**
2154          * Call to WikiPage function for backwards compatibility.
2155          * @see ContentHandler::getActionOverrides
2156          */
2157         public function getActionOverrides() {
2158                 return $this->mPage->getActionOverrides();
2159         }
2160
2161         /**
2162          * Call to WikiPage function for backwards compatibility.
2163          * @see WikiPage::getAutoDeleteReason
2164          */
2165         public function getAutoDeleteReason( &$hasHistory ) {
2166                 return $this->mPage->getAutoDeleteReason( $hasHistory );
2167         }
2168
2169         /**
2170          * Call to WikiPage function for backwards compatibility.
2171          * @see WikiPage::getCategories
2172          */
2173         public function getCategories() {
2174                 return $this->mPage->getCategories();
2175         }
2176
2177         /**
2178          * Call to WikiPage function for backwards compatibility.
2179          * @see WikiPage::getComment
2180          */
2181         public function getComment( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2182                 return $this->mPage->getComment( $audience, $user );
2183         }
2184
2185         /**
2186          * Call to WikiPage function for backwards compatibility.
2187          * @see WikiPage::getContentHandler
2188          */
2189         public function getContentHandler() {
2190                 return $this->mPage->getContentHandler();
2191         }
2192
2193         /**
2194          * Call to WikiPage function for backwards compatibility.
2195          * @see WikiPage::getContentModel
2196          */
2197         public function getContentModel() {
2198                 return $this->mPage->getContentModel();
2199         }
2200
2201         /**
2202          * Call to WikiPage function for backwards compatibility.
2203          * @see WikiPage::getContributors
2204          */
2205         public function getContributors() {
2206                 return $this->mPage->getContributors();
2207         }
2208
2209         /**
2210          * Call to WikiPage function for backwards compatibility.
2211          * @see WikiPage::getCreator
2212          */
2213         public function getCreator( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2214                 return $this->mPage->getCreator( $audience, $user );
2215         }
2216
2217         /**
2218          * Call to WikiPage function for backwards compatibility.
2219          * @see WikiPage::getDeletionUpdates
2220          */
2221         public function getDeletionUpdates( Content $content = null ) {
2222                 return $this->mPage->getDeletionUpdates( $content );
2223         }
2224
2225         /**
2226          * Call to WikiPage function for backwards compatibility.
2227          * @see WikiPage::getHiddenCategories
2228          */
2229         public function getHiddenCategories() {
2230                 return $this->mPage->getHiddenCategories();
2231         }
2232
2233         /**
2234          * Call to WikiPage function for backwards compatibility.
2235          * @see WikiPage::getId
2236          */
2237         public function getId() {
2238                 return $this->mPage->getId();
2239         }
2240
2241         /**
2242          * Call to WikiPage function for backwards compatibility.
2243          * @see WikiPage::getLatest
2244          */
2245         public function getLatest() {
2246                 return $this->mPage->getLatest();
2247         }
2248
2249         /**
2250          * Call to WikiPage function for backwards compatibility.
2251          * @see WikiPage::getLinksTimestamp
2252          */
2253         public function getLinksTimestamp() {
2254                 return $this->mPage->getLinksTimestamp();
2255         }
2256
2257         /**
2258          * Call to WikiPage function for backwards compatibility.
2259          * @see WikiPage::getMinorEdit
2260          */
2261         public function getMinorEdit() {
2262                 return $this->mPage->getMinorEdit();
2263         }
2264
2265         /**
2266          * Call to WikiPage function for backwards compatibility.
2267          * @see WikiPage::getOldestRevision
2268          */
2269         public function getOldestRevision() {
2270                 return $this->mPage->getOldestRevision();
2271         }
2272
2273         /**
2274          * Call to WikiPage function for backwards compatibility.
2275          * @see WikiPage::getRedirectTarget
2276          */
2277         public function getRedirectTarget() {
2278                 return $this->mPage->getRedirectTarget();
2279         }
2280
2281         /**
2282          * Call to WikiPage function for backwards compatibility.
2283          * @see WikiPage::getRedirectURL
2284          */
2285         public function getRedirectURL( $rt ) {
2286                 return $this->mPage->getRedirectURL( $rt );
2287         }
2288
2289         /**
2290          * Call to WikiPage function for backwards compatibility.
2291          * @see WikiPage::getRevision
2292          */
2293         public function getRevision() {
2294                 return $this->mPage->getRevision();
2295         }
2296
2297         /**
2298          * Call to WikiPage function for backwards compatibility.
2299          * @see WikiPage::getTimestamp
2300          */
2301         public function getTimestamp() {
2302                 return $this->mPage->getTimestamp();
2303         }
2304
2305         /**
2306          * Call to WikiPage function for backwards compatibility.
2307          * @see WikiPage::getTouched
2308          */
2309         public function getTouched() {
2310                 return $this->mPage->getTouched();
2311         }
2312
2313         /**
2314          * Call to WikiPage function for backwards compatibility.
2315          * @see WikiPage::getUndoContent
2316          */
2317         public function getUndoContent( Revision $undo, Revision $undoafter = null ) {
2318                 return $this->mPage->getUndoContent( $undo, $undoafter );
2319         }
2320
2321         /**
2322          * Call to WikiPage function for backwards compatibility.
2323          * @see WikiPage::getUser
2324          */
2325         public function getUser( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2326                 return $this->mPage->getUser( $audience, $user );
2327         }
2328
2329         /**
2330          * Call to WikiPage function for backwards compatibility.
2331          * @see WikiPage::getUserText
2332          */
2333         public function getUserText( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2334                 return $this->mPage->getUserText( $audience, $user );
2335         }
2336
2337         /**
2338          * Call to WikiPage function for backwards compatibility.
2339          * @see WikiPage::hasViewableContent
2340          */
2341         public function hasViewableContent() {
2342                 return $this->mPage->hasViewableContent();
2343         }
2344
2345         /**
2346          * Call to WikiPage function for backwards compatibility.
2347          * @see WikiPage::insertOn
2348          */
2349         public function insertOn( $dbw, $pageId = null ) {
2350                 return $this->mPage->insertOn( $dbw, $pageId );
2351         }
2352
2353         /**
2354          * Call to WikiPage function for backwards compatibility.
2355          * @see WikiPage::insertProtectNullRevision
2356          */
2357         public function insertProtectNullRevision( $revCommentMsg, array $limit,
2358                 array $expiry, $cascade, $reason, $user = null
2359         ) {
2360                 return $this->mPage->insertProtectNullRevision( $revCommentMsg, $limit,
2361                         $expiry, $cascade, $reason, $user
2362                 );
2363         }
2364
2365         /**
2366          * Call to WikiPage function for backwards compatibility.
2367          * @see WikiPage::insertRedirect
2368          */
2369         public function insertRedirect() {
2370                 return $this->mPage->insertRedirect();
2371         }
2372
2373         /**
2374          * Call to WikiPage function for backwards compatibility.
2375          * @see WikiPage::insertRedirectEntry
2376          */
2377         public function insertRedirectEntry( Title $rt, $oldLatest = null ) {
2378                 return $this->mPage->insertRedirectEntry( $rt, $oldLatest );
2379         }
2380
2381         /**
2382          * Call to WikiPage function for backwards compatibility.
2383          * @see WikiPage::isCountable
2384          */
2385         public function isCountable( $editInfo = false ) {
2386                 return $this->mPage->isCountable( $editInfo );
2387         }
2388
2389         /**
2390          * Call to WikiPage function for backwards compatibility.
2391          * @see WikiPage::isRedirect
2392          */
2393         public function isRedirect() {
2394                 return $this->mPage->isRedirect();
2395         }
2396
2397         /**
2398          * Call to WikiPage function for backwards compatibility.
2399          * @see WikiPage::loadFromRow
2400          */
2401         public function loadFromRow( $data, $from ) {
2402                 return $this->mPage->loadFromRow( $data, $from );
2403         }
2404
2405         /**
2406          * Call to WikiPage function for backwards compatibility.
2407          * @see WikiPage::loadPageData
2408          */
2409         public function loadPageData( $from = 'fromdb' ) {
2410                 $this->mPage->loadPageData( $from );
2411         }
2412
2413         /**
2414          * Call to WikiPage function for backwards compatibility.
2415          * @see WikiPage::lockAndGetLatest
2416          */
2417         public function lockAndGetLatest() {
2418                 return $this->mPage->lockAndGetLatest();
2419         }
2420
2421         /**
2422          * Call to WikiPage function for backwards compatibility.
2423          * @see WikiPage::makeParserOptions
2424          */
2425         public function makeParserOptions( $context ) {
2426                 return $this->mPage->makeParserOptions( $context );
2427         }
2428
2429         /**
2430          * Call to WikiPage function for backwards compatibility.
2431          * @see WikiPage::pageDataFromId
2432          */
2433         public function pageDataFromId( $dbr, $id, $options = [] ) {
2434                 return $this->mPage->pageDataFromId( $dbr, $id, $options );
2435         }
2436
2437         /**
2438          * Call to WikiPage function for backwards compatibility.
2439          * @see WikiPage::pageDataFromTitle
2440          */
2441         public function pageDataFromTitle( $dbr, $title, $options = [] ) {
2442                 return $this->mPage->pageDataFromTitle( $dbr, $title, $options );
2443         }
2444
2445         /**
2446          * Call to WikiPage function for backwards compatibility.
2447          * @see WikiPage::prepareContentForEdit
2448          */
2449         public function prepareContentForEdit(
2450                 Content $content, $revision = null, User $user = null,
2451                 $serialFormat = null, $useCache = true
2452         ) {
2453                 return $this->mPage->prepareContentForEdit(
2454                         $content, $revision, $user,
2455                         $serialFormat, $useCache
2456                 );
2457         }
2458
2459         /**
2460          * Call to WikiPage function for backwards compatibility.
2461          * @see WikiPage::protectDescription
2462          */
2463         public function protectDescription( array $limit, array $expiry ) {
2464                 return $this->mPage->protectDescription( $limit, $expiry );
2465         }
2466
2467         /**
2468          * Call to WikiPage function for backwards compatibility.
2469          * @see WikiPage::protectDescriptionLog
2470          */
2471         public function protectDescriptionLog( array $limit, array $expiry ) {
2472                 return $this->mPage->protectDescriptionLog( $limit, $expiry );
2473         }
2474
2475         /**
2476          * Call to WikiPage function for backwards compatibility.
2477          * @see WikiPage::replaceSectionAtRev
2478          */
2479         public function replaceSectionAtRev( $sectionId, Content $sectionContent,
2480                 $sectionTitle = '', $baseRevId = null
2481         ) {
2482                 return $this->mPage->replaceSectionAtRev( $sectionId, $sectionContent,
2483                         $sectionTitle, $baseRevId
2484                 );
2485         }
2486
2487         /**
2488          * Call to WikiPage function for backwards compatibility.
2489          * @see WikiPage::replaceSectionContent
2490          */
2491         public function replaceSectionContent(
2492                 $sectionId, Content $sectionContent, $sectionTitle = '', $edittime = null
2493         ) {
2494                 return $this->mPage->replaceSectionContent(
2495                         $sectionId, $sectionContent, $sectionTitle, $edittime
2496                 );
2497         }
2498
2499         /**
2500          * Call to WikiPage function for backwards compatibility.
2501          * @see WikiPage::setTimestamp
2502          */
2503         public function setTimestamp( $ts ) {
2504                 return $this->mPage->setTimestamp( $ts );
2505         }
2506
2507         /**
2508          * Call to WikiPage function for backwards compatibility.
2509          * @see WikiPage::shouldCheckParserCache
2510          */
2511         public function shouldCheckParserCache( ParserOptions $parserOptions, $oldId ) {
2512                 return $this->mPage->shouldCheckParserCache( $parserOptions, $oldId );
2513         }
2514
2515         /**
2516          * Call to WikiPage function for backwards compatibility.
2517          * @see WikiPage::supportsSections
2518          */
2519         public function supportsSections() {
2520                 return $this->mPage->supportsSections();
2521         }
2522
2523         /**
2524          * Call to WikiPage function for backwards compatibility.
2525          * @see WikiPage::triggerOpportunisticLinksUpdate
2526          */
2527         public function triggerOpportunisticLinksUpdate( ParserOutput $parserOutput ) {
2528                 return $this->mPage->triggerOpportunisticLinksUpdate( $parserOutput );
2529         }
2530
2531         /**
2532          * Call to WikiPage function for backwards compatibility.
2533          * @see WikiPage::updateCategoryCounts
2534          */
2535         public function updateCategoryCounts( array $added, array $deleted, $id = 0 ) {
2536                 return $this->mPage->updateCategoryCounts( $added, $deleted, $id );
2537         }
2538
2539         /**
2540          * Call to WikiPage function for backwards compatibility.
2541          * @see WikiPage::updateIfNewerOn
2542          */
2543         public function updateIfNewerOn( $dbw, $revision ) {
2544                 return $this->mPage->updateIfNewerOn( $dbw, $revision );
2545         }
2546
2547         /**
2548          * Call to WikiPage function for backwards compatibility.
2549          * @see WikiPage::updateRedirectOn
2550          */
2551         public function updateRedirectOn( $dbw, $redirectTitle, $lastRevIsRedirect = null ) {
2552                 return $this->mPage->updateRedirectOn( $dbw, $redirectTitle, $lastRevIsRedirect = null );
2553         }
2554
2555         /**
2556          * Call to WikiPage function for backwards compatibility.
2557          * @see WikiPage::updateRevisionOn
2558          */
2559         public function updateRevisionOn( $dbw, $revision, $lastRevision = null,
2560                 $lastRevIsRedirect = null
2561         ) {
2562                 return $this->mPage->updateRevisionOn( $dbw, $revision, $lastRevision,
2563                         $lastRevIsRedirect
2564                 );
2565         }
2566
2567         /**
2568          * @param array $limit
2569          * @param array $expiry
2570          * @param bool &$cascade
2571          * @param string $reason
2572          * @param User $user
2573          * @return Status
2574          */
2575         public function doUpdateRestrictions( array $limit, array $expiry, &$cascade,
2576                 $reason, User $user
2577         ) {
2578                 return $this->mPage->doUpdateRestrictions( $limit, $expiry, $cascade, $reason, $user );
2579         }
2580
2581         /**
2582          * @param array $limit
2583          * @param string $reason
2584          * @param int &$cascade
2585          * @param array $expiry
2586          * @return bool
2587          */
2588         public function updateRestrictions( $limit = [], $reason = '',
2589                 &$cascade = 0, $expiry = []
2590         ) {
2591                 return $this->mPage->doUpdateRestrictions(
2592                         $limit,
2593                         $expiry,
2594                         $cascade,
2595                         $reason,
2596                         $this->getContext()->getUser()
2597                 );
2598         }
2599
2600         /**
2601          * @param string $reason
2602          * @param bool $suppress
2603          * @param int $u1 Unused
2604          * @param bool $u2 Unused
2605          * @param string &$error
2606          * @return bool
2607          */
2608         public function doDeleteArticle(
2609                 $reason, $suppress = false, $u1 = null, $u2 = null, &$error = ''
2610         ) {
2611                 return $this->mPage->doDeleteArticle( $reason, $suppress, $u1, $u2, $error );
2612         }
2613
2614         /**
2615          * @param string $fromP
2616          * @param string $summary
2617          * @param string $token
2618          * @param bool $bot
2619          * @param array &$resultDetails
2620          * @param User|null $user
2621          * @return array
2622          */
2623         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails, User $user = null ) {
2624                 $user = is_null( $user ) ? $this->getContext()->getUser() : $user;
2625                 return $this->mPage->doRollback( $fromP, $summary, $token, $bot, $resultDetails, $user );
2626         }
2627
2628         /**
2629          * @param string $fromP
2630          * @param string $summary
2631          * @param bool $bot
2632          * @param array &$resultDetails
2633          * @param User|null $guser
2634          * @return array
2635          */
2636         public function commitRollback( $fromP, $summary, $bot, &$resultDetails, User $guser = null ) {
2637                 $guser = is_null( $guser ) ? $this->getContext()->getUser() : $guser;
2638                 return $this->mPage->commitRollback( $fromP, $summary, $bot, $resultDetails, $guser );
2639         }
2640
2641         /**
2642          * @param bool &$hasHistory
2643          * @return mixed
2644          */
2645         public function generateReason( &$hasHistory ) {
2646                 $title = $this->mPage->getTitle();
2647                 $handler = ContentHandler::getForTitle( $title );
2648                 return $handler->getAutoDeleteReason( $title, $hasHistory );
2649         }
2650
2651         /**
2652          * @return array
2653          *
2654          * @deprecated since 1.24, use WikiPage::selectFields() instead
2655          */
2656         public static function selectFields() {
2657                 wfDeprecated( __METHOD__, '1.24' );
2658                 return WikiPage::selectFields();
2659         }
2660
2661         /**
2662          * @param Title $title
2663          *
2664          * @deprecated since 1.24, use WikiPage::onArticleCreate() instead
2665          */
2666         public static function onArticleCreate( $title ) {
2667                 wfDeprecated( __METHOD__, '1.24' );
2668                 WikiPage::onArticleCreate( $title );
2669         }
2670
2671         /**
2672          * @param Title $title
2673          *
2674          * @deprecated since 1.24, use WikiPage::onArticleDelete() instead
2675          */
2676         public static function onArticleDelete( $title ) {
2677                 wfDeprecated( __METHOD__, '1.24' );
2678                 WikiPage::onArticleDelete( $title );
2679         }
2680
2681         /**
2682          * @param Title $title
2683          *
2684          * @deprecated since 1.24, use WikiPage::onArticleEdit() instead
2685          */
2686         public static function onArticleEdit( $title ) {
2687                 wfDeprecated( __METHOD__, '1.24' );
2688                 WikiPage::onArticleEdit( $title );
2689         }
2690
2691         // ******
2692 }