includes/page/Article.php

   1 <?php
   2 /**
   3  * User interface for page actions.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  */
  22
  23 /**
  24  * Class for viewing MediaWiki article and history.
  25  *
  26  * This maintains WikiPage functions for backwards compatibility.
  27  *
  28  * @todo Move and rewrite code to an Action class
  29  *
  30  * See design.txt for an overview.
  31  * Note: edit user interface and cache support functions have been
  32  * moved to separate EditPage and HTMLFileCache classes.
  33  */
  34 class Article implements Page {
  35         /** @var IContextSource The context this Article is executed in */
  36         protected $mContext;
  37
  38         /** @var WikiPage The WikiPage object of this instance */
  39         protected $mPage;
  40
  41         /** @var ParserOptions ParserOptions object for $wgUser articles */
  42         public $mParserOptions;
  43
  44         /**
  45          * @var string Text of the revision we are working on
  46          * @todo BC cruft
  47          */
  48         public $mContent;
  49
  50         /**
  51          * @var Content Content of the revision we are working on
  52          * @since 1.21
  53          */
  54         public $mContentObject;
  55
  56         /** @var bool Is the content ($mContent) already loaded? */
  57         public $mContentLoaded = false;
  58
  59         /** @var int|null The oldid of the article that is to be shown, 0 for the current revision */
  60         public $mOldId;
  61
  62         /** @var Title Title from which we were redirected here */
  63         public $mRedirectedFrom = null;
  64
  65         /** @var string|bool URL to redirect to or false if none */
  66         public $mRedirectUrl = false;
  67
  68         /** @var int Revision ID of revision we are working on */
  69         public $mRevIdFetched = 0;
  70
  71         /** @var Revision Revision we are working on */
  72         public $mRevision = null;
  73
  74         /** @var ParserOutput */
  75         public $mParserOutput;
  76
  77         /**
  78          * Constructor and clear the article
  79          * @param Title $title Reference to a Title object.
  80          * @param int $oldId Revision ID, null to fetch from request, zero for current
  81          */
  82         public function __construct( Title $title, $oldId = null ) {
  83                 $this->mOldId = $oldId;
  84                 $this->mPage = $this->newPage( $title );
  85         }
  86
  87         /**
  88          * @param Title $title
  89          * @return WikiPage
  90          */
  91         protected function newPage( Title $title ) {
  92                 return new WikiPage( $title );
  93         }
  94
  95         /**
  96          * Constructor from a page id
  97          * @param int $id Article ID to load
  98          * @return Article|null
  99          */
 100         public static function newFromID( $id ) {
 101                 $t = Title::newFromID( $id );
 102                 return $t == null ? null : new static( $t );
 103         }
 104
 105         /**
 106          * Create an Article object of the appropriate class for the given page.
 107          *
 108          * @param Title $title
 109          * @param IContextSource $context
 110          * @return Article
 111          */
 112         public static function newFromTitle( $title, IContextSource $context ) {
 113                 if ( NS_MEDIA == $title->getNamespace() ) {
 114                         // FIXME: where should this go?
 115                         $title = Title::makeTitle( NS_FILE, $title->getDBkey() );
 116                 }
 117
 118                 $page = null;
 119                 Hooks::run( 'ArticleFromTitle', [ &$title, &$page, $context ] );
 120                 if ( !$page ) {
 121                         switch ( $title->getNamespace() ) {
 122                                 case NS_FILE:
 123                                         $page = new ImagePage( $title );
 124                                         break;
 125                                 case NS_CATEGORY:
 126                                         $page = new CategoryPage( $title );
 127                                         break;
 128                                 default:
 129                                         $page = new Article( $title );
 130                         }
 131                 }
 132                 $page->setContext( $context );
 133
 134                 return $page;
 135         }
 136
 137         /**
 138          * Create an Article object of the appropriate class for the given page.
 139          *
 140          * @param WikiPage $page
 141          * @param IContextSource $context
 142          * @return Article
 143          */
 144         public static function newFromWikiPage( WikiPage $page, IContextSource $context ) {
 145                 $article = self::newFromTitle( $page->getTitle(), $context );
 146                 $article->mPage = $page; // override to keep process cached vars
 147                 return $article;
 148         }
 149
 150         /**
 151          * Get the page this view was redirected from
 152          * @return Title|null
 153          * @since 1.28
 154          */
 155         public function getRedirectedFrom() {
 156                 return $this->mRedirectedFrom;
 157         }
 158
 159         /**
 160          * Tell the page view functions that this view was redirected
 161          * from another page on the wiki.
 162          * @param Title $from
 163          */
 164         public function setRedirectedFrom( Title $from ) {
 165                 $this->mRedirectedFrom = $from;
 166         }
 167
 168         /**
 169          * Get the title object of the article
 170          *
 171          * @return Title Title object of this page
 172          */
 173         public function getTitle() {
 174                 return $this->mPage->getTitle();
 175         }
 176
 177         /**
 178          * Get the WikiPage object of this instance
 179          *
 180          * @since 1.19
 181          * @return WikiPage
 182          */
 183         public function getPage() {
 184                 return $this->mPage;
 185         }
 186
 187         /**
 188          * Clear the object
 189          */
 190         public function clear() {
 191                 $this->mContentLoaded = false;
 192
 193                 $this->mRedirectedFrom = null; # Title object if set
 194                 $this->mRevIdFetched = 0;
 195                 $this->mRedirectUrl = false;
 196
 197                 $this->mPage->clear();
 198         }
 199
 200         /**
 201          * Note that getContent does not follow redirects anymore.
 202          * If you need to fetch redirectable content easily, try
 203          * the shortcut in WikiPage::getRedirectTarget()
 204          *
 205          * This function has side effects! Do not use this function if you
 206          * only want the real revision text if any.
 207          *
 208          * @deprecated since 1.21; use WikiPage::getContent() instead
 209          *
 210          * @return string Return the text of this revision
 211          */
 212         public function getContent() {
 213                 wfDeprecated( __METHOD__, '1.21' );
 214                 $content = $this->getContentObject();
 215                 return ContentHandler::getContentText( $content );
 216         }
 217
 218         /**
 219          * Returns a Content object representing the pages effective display content,
 220          * not necessarily the revision's content!
 221          *
 222          * Note that getContent does not follow redirects anymore.
 223          * If you need to fetch redirectable content easily, try
 224          * the shortcut in WikiPage::getRedirectTarget()
 225          *
 226          * This function has side effects! Do not use this function if you
 227          * only want the real revision text if any.
 228          *
 229          * @return Content Return the content of this revision
 230          *
 231          * @since 1.21
 232          */
 233         protected function getContentObject() {
 234
 235                 if ( $this->mPage->getId() === 0 ) {
 236                         # If this is a MediaWiki:x message, then load the messages
 237                         # and return the message value for x.
 238                         if ( $this->getTitle()->getNamespace() == NS_MEDIAWIKI ) {
 239                                 $text = $this->getTitle()->getDefaultMessageText();
 240                                 if ( $text === false ) {
 241                                         $text = '';
 242                                 }
 243
 244                                 $content = ContentHandler::makeContent( $text, $this->getTitle() );
 245                         } else {
 246                                 $message = $this->getContext()->getUser()->isLoggedIn() ? 'noarticletext' : 'noarticletextanon';
 247                                 $content = new MessageContent( $message, null, 'parsemag' );
 248                         }
 249                 } else {
 250                         $this->fetchContentObject();
 251                         $content = $this->mContentObject;
 252                 }
 253
 254                 return $content;
 255         }
 256
 257         /**
 258          * @return int The oldid of the article that is to be shown, 0 for the current revision
 259          */
 260         public function getOldID() {
 261                 if ( is_null( $this->mOldId ) ) {
 262                         $this->mOldId = $this->getOldIDFromRequest();
 263                 }
 264
 265                 return $this->mOldId;
 266         }
 267
 268         /**
 269          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 270          *
 271          * @return int The old id for the request
 272          */
 273         public function getOldIDFromRequest() {
 274                 $this->mRedirectUrl = false;
 275
 276                 $request = $this->getContext()->getRequest();
 277                 $oldid = $request->getIntOrNull( 'oldid' );
 278
 279                 if ( $oldid === null ) {
 280                         return 0;
 281                 }
 282
 283                 if ( $oldid !== 0 ) {
 284                         # Load the given revision and check whether the page is another one.
 285                         # In that case, update this instance to reflect the change.
 286                         if ( $oldid === $this->mPage->getLatest() ) {
 287                                 $this->mRevision = $this->mPage->getRevision();
 288                         } else {
 289                                 $this->mRevision = Revision::newFromId( $oldid );
 290                                 if ( $this->mRevision !== null ) {
 291                                         // Revision title doesn't match the page title given?
 292                                         if ( $this->mPage->getId() != $this->mRevision->getPage() ) {
 293                                                 $function = [ get_class( $this->mPage ), 'newFromID' ];
 294                                                 $this->mPage = call_user_func( $function, $this->mRevision->getPage() );
 295                                         }
 296                                 }
 297                         }
 298                 }
 299
 300                 if ( $request->getVal( 'direction' ) == 'next' ) {
 301                         $nextid = $this->getTitle()->getNextRevisionID( $oldid );
 302                         if ( $nextid ) {
 303                                 $oldid = $nextid;
 304                                 $this->mRevision = null;
 305                         } else {
 306                                 $this->mRedirectUrl = $this->getTitle()->getFullURL( 'redirect=no' );
 307                         }
 308                 } elseif ( $request->getVal( 'direction' ) == 'prev' ) {
 309                         $previd = $this->getTitle()->getPreviousRevisionID( $oldid );
 310                         if ( $previd ) {
 311                                 $oldid = $previd;
 312                                 $this->mRevision = null;
 313                         }
 314                 }
 315
 316                 return $oldid;
 317         }
 318
 319         /**
 320          * Get text content object
 321          * Does *NOT* follow redirects.
 322          * @todo When is this null?
 323          *
 324          * @note Code that wants to retrieve page content from the database should
 325          * use WikiPage::getContent().
 326          *
 327          * @return Content|null|bool
 328          *
 329          * @since 1.21
 330          */
 331         protected function fetchContentObject() {
 332                 if ( $this->mContentLoaded ) {
 333                         return $this->mContentObject;
 334                 }
 335
 336                 $this->mContentLoaded = true;
 337                 $this->mContent = null;
 338
 339                 $oldid = $this->getOldID();
 340
 341                 # Pre-fill content with error message so that if something
 342                 # fails we'll have something telling us what we intended.
 343                 // XXX: this isn't page content but a UI message. horrible.
 344                 $this->mContentObject = new MessageContent( 'missing-revision', [ $oldid ] );
 345
 346                 if ( $oldid ) {
 347                         # $this->mRevision might already be fetched by getOldIDFromRequest()
 348                         if ( !$this->mRevision ) {
 349                                 $this->mRevision = Revision::newFromId( $oldid );
 350                                 if ( !$this->mRevision ) {
 351                                         wfDebug( __METHOD__ . " failed to retrieve specified revision, id $oldid\n" );
 352                                         return false;
 353                                 }
 354                         }
 355                 } else {
 356                         $oldid = $this->mPage->getLatest();
 357                         if ( !$oldid ) {
 358                                 wfDebug( __METHOD__ . " failed to find page data for title " .
 359                                         $this->getTitle()->getPrefixedText() . "\n" );
 360                                 return false;
 361                         }
 362
 363                         # Update error message with correct oldid
 364                         $this->mContentObject = new MessageContent( 'missing-revision', [ $oldid ] );
 365
 366                         $this->mRevision = $this->mPage->getRevision();
 367
 368                         if ( !$this->mRevision ) {
 369                                 wfDebug( __METHOD__ . " failed to retrieve current page, rev_id $oldid\n" );
 370                                 return false;
 371                         }
 372                 }
 373
 374                 // @todo FIXME: Horrible, horrible! This content-loading interface just plain sucks.
 375                 // We should instead work with the Revision object when we need it...
 376                 // Loads if user is allowed
 377                 $content = $this->mRevision->getContent(
 378                         Revision::FOR_THIS_USER,
 379                         $this->getContext()->getUser()
 380                 );
 381
 382                 if ( !$content ) {
 383                         wfDebug( __METHOD__ . " failed to retrieve content of revision " .
 384                                 $this->mRevision->getId() . "\n" );
 385                         return false;
 386                 }
 387
 388                 $this->mContentObject = $content;
 389                 $this->mRevIdFetched = $this->mRevision->getId();
 390
 391                 // Avoid PHP 7.1 warning of passing $this by reference
 392                 $articlePage = $this;
 393
 394                 ContentHandler::runLegacyHooks(
 395                         'ArticleAfterFetchContentObject',
 396                         [ &$articlePage, &$this->mContentObject ],
 397                         '1.21'
 398                 );
 399
 400                 return $this->mContentObject;
 401         }
 402
 403         /**
 404          * Returns true if the currently-referenced revision is the current edit
 405          * to this page (and it exists).
 406          * @return bool
 407          */
 408         public function isCurrent() {
 409                 # If no oldid, this is the current version.
 410                 if ( $this->getOldID() == 0 ) {
 411                         return true;
 412                 }
 413
 414                 return $this->mPage->exists() && $this->mRevision && $this->mRevision->isCurrent();
 415         }
 416
 417         /**
 418          * Get the fetched Revision object depending on request parameters or null
 419          * on failure.
 420          *
 421          * @since 1.19
 422          * @return Revision|null
 423          */
 424         public function getRevisionFetched() {
 425                 $this->fetchContentObject();
 426
 427                 return $this->mRevision;
 428         }
 429
 430         /**
 431          * Use this to fetch the rev ID used on page views
 432          *
 433          * @return int Revision ID of last article revision
 434          */
 435         public function getRevIdFetched() {
 436                 if ( $this->mRevIdFetched ) {
 437                         return $this->mRevIdFetched;
 438                 } else {
 439                         return $this->mPage->getLatest();
 440                 }
 441         }
 442
 443         /**
 444          * This is the default action of the index.php entry point: just view the
 445          * page of the given title.
 446          */
 447         public function view() {
 448                 global $wgUseFileCache, $wgDebugToolbar;
 449
 450                 # Get variables from query string
 451                 # As side effect this will load the revision and update the title
 452                 # in a revision ID is passed in the request, so this should remain
 453                 # the first call of this method even if $oldid is used way below.
 454                 $oldid = $this->getOldID();
 455
 456                 $user = $this->getContext()->getUser();
 457                 # Another whitelist check in case getOldID() is altering the title
 458                 $permErrors = $this->getTitle()->getUserPermissionsErrors( 'read', $user );
 459                 if ( count( $permErrors ) ) {
 460                         wfDebug( __METHOD__ . ": denied on secondary read check\n" );
 461                         throw new PermissionsError( 'read', $permErrors );
 462                 }
 463
 464                 $outputPage = $this->getContext()->getOutput();
 465                 # getOldID() may as well want us to redirect somewhere else
 466                 if ( $this->mRedirectUrl ) {
 467                         $outputPage->redirect( $this->mRedirectUrl );
 468                         wfDebug( __METHOD__ . ": redirecting due to oldid\n" );
 469
 470                         return;
 471                 }
 472
 473                 # If we got diff in the query, we want to see a diff page instead of the article.
 474                 if ( $this->getContext()->getRequest()->getCheck( 'diff' ) ) {
 475                         wfDebug( __METHOD__ . ": showing diff page\n" );
 476                         $this->showDiffPage();
 477
 478                         return;
 479                 }
 480
 481                 # Set page title (may be overridden by DISPLAYTITLE)
 482                 $outputPage->setPageTitle( $this->getTitle()->getPrefixedText() );
 483
 484                 $outputPage->setArticleFlag( true );
 485                 # Allow frames by default
 486                 $outputPage->allowClickjacking();
 487
 488                 $parserCache = ParserCache::singleton();
 489
 490                 $parserOptions = $this->getParserOptions();
 491                 # Render printable version, use printable version cache
 492                 if ( $outputPage->isPrintable() ) {
 493                         $parserOptions->setIsPrintable( true );
 494                         $parserOptions->setEditSection( false );
 495                 } elseif ( !$this->isCurrent() || !$this->getTitle()->quickUserCan( 'edit', $user ) ) {
 496                         $parserOptions->setEditSection( false );
 497                 }
 498
 499                 # Try client and file cache
 500                 if ( !$wgDebugToolbar && $oldid === 0 && $this->mPage->checkTouched() ) {
 501                         # Try to stream the output from file cache
 502                         if ( $wgUseFileCache && $this->tryFileCache() ) {
 503                                 wfDebug( __METHOD__ . ": done file cache\n" );
 504                                 # tell wgOut that output is taken care of
 505                                 $outputPage->disable();
 506                                 $this->mPage->doViewUpdates( $user, $oldid );
 507
 508                                 return;
 509                         }
 510                 }
 511
 512                 # Should the parser cache be used?
 513                 $useParserCache = $this->mPage->shouldCheckParserCache( $parserOptions, $oldid );
 514                 wfDebug( 'Article::view using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
 515                 if ( $user->getStubThreshold() ) {
 516                         $this->getContext()->getStats()->increment( 'pcache_miss_stub' );
 517                 }
 518
 519                 $this->showRedirectedFromHeader();
 520                 $this->showNamespaceHeader();
 521
 522                 # Iterate through the possible ways of constructing the output text.
 523                 # Keep going until $outputDone is set, or we run out of things to do.
 524                 $pass = 0;
 525                 $outputDone = false;
 526                 $this->mParserOutput = false;
 527
 528                 while ( !$outputDone && ++$pass ) {
 529                         switch ( $pass ) {
 530                                 case 1:
 531                                         // Avoid PHP 7.1 warning of passing $this by reference
 532                                         $articlePage = $this;
 533                                         Hooks::run( 'ArticleViewHeader', [ &$articlePage, &$outputDone, &$useParserCache ] );
 534                                         break;
 535                                 case 2:
 536                                         # Early abort if the page doesn't exist
 537                                         if ( !$this->mPage->exists() ) {
 538                                                 wfDebug( __METHOD__ . ": showing missing article\n" );
 539                                                 $this->showMissingArticle();
 540                                                 $this->mPage->doViewUpdates( $user );
 541                                                 return;
 542                                         }
 543
 544                                         # Try the parser cache
 545                                         if ( $useParserCache ) {
 546                                                 $this->mParserOutput = $parserCache->get( $this->mPage, $parserOptions );
 547
 548                                                 if ( $this->mParserOutput !== false ) {
 549                                                         if ( $oldid ) {
 550                                                                 wfDebug( __METHOD__ . ": showing parser cache contents for current rev permalink\n" );
 551                                                                 $this->setOldSubtitle( $oldid );
 552                                                         } else {
 553                                                                 wfDebug( __METHOD__ . ": showing parser cache contents\n" );
 554                                                         }
 555                                                         $outputPage->addParserOutput( $this->mParserOutput );
 556                                                         # Ensure that UI elements requiring revision ID have
 557                                                         # the correct version information.
 558                                                         $outputPage->setRevisionId( $this->mPage->getLatest() );
 559                                                         # Preload timestamp to avoid a DB hit
 560                                                         $cachedTimestamp = $this->mParserOutput->getTimestamp();
 561                                                         if ( $cachedTimestamp !== null ) {
 562                                                                 $outputPage->setRevisionTimestamp( $cachedTimestamp );
 563                                                                 $this->mPage->setTimestamp( $cachedTimestamp );
 564                                                         }
 565                                                         $outputDone = true;
 566                                                 }
 567                                         }
 568                                         break;
 569                                 case 3:
 570                                         # This will set $this->mRevision if needed
 571                                         $this->fetchContentObject();
 572
 573                                         # Are we looking at an old revision
 574                                         if ( $oldid && $this->mRevision ) {
 575                                                 $this->setOldSubtitle( $oldid );
 576
 577                                                 if ( !$this->showDeletedRevisionHeader() ) {
 578                                                         wfDebug( __METHOD__ . ": cannot view deleted revision\n" );
 579                                                         return;
 580                                                 }
 581                                         }
 582
 583                                         # Ensure that UI elements requiring revision ID have
 584                                         # the correct version information.
 585                                         $outputPage->setRevisionId( $this->getRevIdFetched() );
 586                                         # Preload timestamp to avoid a DB hit
 587                                         $outputPage->setRevisionTimestamp( $this->mPage->getTimestamp() );
 588
 589                                         if ( !Hooks::run( 'ArticleContentViewCustom',
 590                                                         [ $this->fetchContentObject(), $this->getTitle(), $outputPage ] ) ) {
 591
 592                                                 # Allow extensions do their own custom view for certain pages
 593                                                 $outputDone = true;
 594                                         }
 595                                         break;
 596                                 case 4:
 597                                         # Run the parse, protected by a pool counter
 598                                         wfDebug( __METHOD__ . ": doing uncached parse\n" );
 599
 600                                         $content = $this->getContentObject();
 601                                         $poolArticleView = new PoolWorkArticleView( $this->getPage(), $parserOptions,
 602                                                 $this->getRevIdFetched(), $useParserCache, $content );
 603
 604                                         if ( !$poolArticleView->execute() ) {
 605                                                 $error = $poolArticleView->getError();
 606                                                 if ( $error ) {
 607                                                         $outputPage->clearHTML(); // for release() errors
 608                                                         $outputPage->enableClientCache( false );
 609                                                         $outputPage->setRobotPolicy( 'noindex,nofollow' );
 610
 611                                                         $errortext = $error->getWikiText( false, 'view-pool-error' );
 612                                                         $outputPage->addWikiText( '<div class="errorbox">' . $errortext . '</div>' );
 613                                                 }
 614                                                 # Connection or timeout error
 615                                                 return;
 616                                         }
 617
 618                                         $this->mParserOutput = $poolArticleView->getParserOutput();
 619                                         $outputPage->addParserOutput( $this->mParserOutput );
 620                                         if ( $content->getRedirectTarget() ) {
 621                                                 $outputPage->addSubtitle( "<span id=\"redirectsub\">" .
 622                                                         $this->getContext()->msg( 'redirectpagesub' )->parse() . "</span>" );
 623                                         }
 624
 625                                         # Don't cache a dirty ParserOutput object
 626                                         if ( $poolArticleView->getIsDirty() ) {
 627                                                 $outputPage->setCdnMaxage( 0 );
 628                                                 $outputPage->addHTML( "<!-- parser cache is expired, " .
 629                                                         "sending anyway due to pool overload-->\n" );
 630                                         }
 631
 632                                         $outputDone = true;
 633                                         break;
 634                                 # Should be unreachable, but just in case...
 635                                 default:
 636                                         break 2;
 637                         }
 638                 }
 639
 640                 # Get the ParserOutput actually *displayed* here.
 641                 # Note that $this->mParserOutput is the *current*/oldid version output.
 642                 $pOutput = ( $outputDone instanceof ParserOutput )
 643                         ? $outputDone // object fetched by hook
 644                         : $this->mParserOutput;
 645
 646                 # Adjust title for main page & pages with displaytitle
 647                 if ( $pOutput ) {
 648                         $this->adjustDisplayTitle( $pOutput );
 649                 }
 650
 651                 # For the main page, overwrite the <title> element with the con-
 652                 # tents of 'pagetitle-view-mainpage' instead of the default (if
 653                 # that's not empty).
 654                 # This message always exists because it is in the i18n files
 655                 if ( $this->getTitle()->isMainPage() ) {
 656                         $msg = wfMessage( 'pagetitle-view-mainpage' )->inContentLanguage();
 657                         if ( !$msg->isDisabled() ) {
 658                                 $outputPage->setHTMLTitle( $msg->title( $this->getTitle() )->text() );
 659                         }
 660                 }
 661
 662                 # Use adaptive TTLs for CDN so delayed/failed purges are noticed less often.
 663                 # This could use getTouched(), but that could be scary for major template edits.
 664                 $outputPage->adaptCdnTTL( $this->mPage->getTimestamp(), IExpiringStore::TTL_DAY );
 665
 666                 # Check for any __NOINDEX__ tags on the page using $pOutput
 667                 $policy = $this->getRobotPolicy( 'view', $pOutput );
 668                 $outputPage->setIndexPolicy( $policy['index'] );
 669                 $outputPage->setFollowPolicy( $policy['follow'] );
 670
 671                 $this->showViewFooter();
 672                 $this->mPage->doViewUpdates( $user, $oldid );
 673
 674                 $outputPage->addModules( 'mediawiki.action.view.postEdit' );
 675         }
 676
 677         /**
 678          * Adjust title for pages with displaytitle, -{T|}- or language conversion
 679          * @param ParserOutput $pOutput
 680          */
 681         public function adjustDisplayTitle( ParserOutput $pOutput ) {
 682                 # Adjust the title if it was set by displaytitle, -{T|}- or language conversion
 683                 $titleText = $pOutput->getTitleText();
 684                 if ( strval( $titleText ) !== '' ) {
 685                         $this->getContext()->getOutput()->setPageTitle( $titleText );
 686                 }
 687         }
 688
 689         /**
 690          * Show a diff page according to current request variables. For use within
 691          * Article::view() only, other callers should use the DifferenceEngine class.
 692          */
 693         protected function showDiffPage() {
 694                 $request = $this->getContext()->getRequest();
 695                 $user = $this->getContext()->getUser();
 696                 $diff = $request->getVal( 'diff' );
 697                 $rcid = $request->getVal( 'rcid' );
 698                 $diffOnly = $request->getBool( 'diffonly', $user->getOption( 'diffonly' ) );
 699                 $purge = $request->getVal( 'action' ) == 'purge';
 700                 $unhide = $request->getInt( 'unhide' ) == 1;
 701                 $oldid = $this->getOldID();
 702
 703                 $rev = $this->getRevisionFetched();
 704
 705                 if ( !$rev ) {
 706                         $this->getContext()->getOutput()->setPageTitle( wfMessage( 'errorpagetitle' ) );
 707                         $msg = $this->getContext()->msg( 'difference-missing-revision' )
 708                                 ->params( $oldid )
 709                                 ->numParams( 1 )
 710                                 ->parseAsBlock();
 711                         $this->getContext()->getOutput()->addHTML( $msg );
 712                         return;
 713                 }
 714
 715                 $contentHandler = $rev->getContentHandler();
 716                 $de = $contentHandler->createDifferenceEngine(
 717                         $this->getContext(),
 718                         $oldid,
 719                         $diff,
 720                         $rcid,
 721                         $purge,
 722                         $unhide
 723                 );
 724
 725                 // DifferenceEngine directly fetched the revision:
 726                 $this->mRevIdFetched = $de->mNewid;
 727                 $de->showDiffPage( $diffOnly );
 728
 729                 // Run view updates for the newer revision being diffed (and shown
 730                 // below the diff if not $diffOnly).
 731                 list( $old, $new ) = $de->mapDiffPrevNext( $oldid, $diff );
 732                 // New can be false, convert it to 0 - this conveniently means the latest revision
 733                 $this->mPage->doViewUpdates( $user, (int)$new );
 734         }
 735
 736         /**
 737          * Get the robot policy to be used for the current view
 738          * @param string $action The action= GET parameter
 739          * @param ParserOutput|null $pOutput
 740          * @return array The policy that should be set
 741          * @todo actions other than 'view'
 742          */
 743         public function getRobotPolicy( $action, $pOutput = null ) {
 744                 global $wgArticleRobotPolicies, $wgNamespaceRobotPolicies, $wgDefaultRobotPolicy;
 745
 746                 $ns = $this->getTitle()->getNamespace();
 747
 748                 # Don't index user and user talk pages for blocked users (bug 11443)
 749                 if ( ( $ns == NS_USER || $ns == NS_USER_TALK ) && !$this->getTitle()->isSubpage() ) {
 750                         $specificTarget = null;
 751                         $vagueTarget = null;
 752                         $titleText = $this->getTitle()->getText();
 753                         if ( IP::isValid( $titleText ) ) {
 754                                 $vagueTarget = $titleText;
 755                         } else {
 756                                 $specificTarget = $titleText;
 757                         }
 758                         if ( Block::newFromTarget( $specificTarget, $vagueTarget ) instanceof Block ) {
 759                                 return [
 760                                         'index' => 'noindex',
 761                                         'follow' => 'nofollow'
 762                                 ];
 763                         }
 764                 }
 765
 766                 if ( $this->mPage->getId() === 0 || $this->getOldID() ) {
 767                         # Non-articles (special pages etc), and old revisions
 768                         return [
 769                                 'index' => 'noindex',
 770                                 'follow' => 'nofollow'
 771                         ];
 772                 } elseif ( $this->getContext()->getOutput()->isPrintable() ) {
 773                         # Discourage indexing of printable versions, but encourage following
 774                         return [
 775                                 'index' => 'noindex',
 776                                 'follow' => 'follow'
 777                         ];
 778                 } elseif ( $this->getContext()->getRequest()->getInt( 'curid' ) ) {
 779                         # For ?curid=x urls, disallow indexing
 780                         return [
 781                                 'index' => 'noindex',
 782                                 'follow' => 'follow'
 783                         ];
 784                 }
 785
 786                 # Otherwise, construct the policy based on the various config variables.
 787                 $policy = self::formatRobotPolicy( $wgDefaultRobotPolicy );
 788
 789                 if ( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 790                         # Honour customised robot policies for this namespace
 791                         $policy = array_merge(
 792                                 $policy,
 793                                 self::formatRobotPolicy( $wgNamespaceRobotPolicies[$ns] )
 794                         );
 795                 }
 796                 if ( $this->getTitle()->canUseNoindex() && is_object( $pOutput ) && $pOutput->getIndexPolicy() ) {
 797                         # __INDEX__ and __NOINDEX__ magic words, if allowed. Incorporates
 798                         # a final sanity check that we have really got the parser output.
 799                         $policy = array_merge(
 800                                 $policy,
 801                                 [ 'index' => $pOutput->getIndexPolicy() ]
 802                         );
 803                 }
 804
 805                 if ( isset( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] ) ) {
 806                         # (bug 14900) site config can override user-defined __INDEX__ or __NOINDEX__
 807                         $policy = array_merge(
 808                                 $policy,
 809                                 self::formatRobotPolicy( $wgArticleRobotPolicies[$this->getTitle()->getPrefixedText()] )
 810                         );
 811                 }
 812
 813                 return $policy;
 814         }
 815
 816         /**
 817          * Converts a String robot policy into an associative array, to allow
 818          * merging of several policies using array_merge().
 819          * @param array|string $policy Returns empty array on null/false/'', transparent
 820          *   to already-converted arrays, converts string.
 821          * @return array 'index' => \<indexpolicy\>, 'follow' => \<followpolicy\>
 822          */
 823         public static function formatRobotPolicy( $policy ) {
 824                 if ( is_array( $policy ) ) {
 825                         return $policy;
 826                 } elseif ( !$policy ) {
 827                         return [];
 828                 }
 829
 830                 $policy = explode( ',', $policy );
 831                 $policy = array_map( 'trim', $policy );
 832
 833                 $arr = [];
 834                 foreach ( $policy as $var ) {
 835                         if ( in_array( $var, [ 'index', 'noindex' ] ) ) {
 836                                 $arr['index'] = $var;
 837                         } elseif ( in_array( $var, [ 'follow', 'nofollow' ] ) ) {
 838                                 $arr['follow'] = $var;
 839                         }
 840                 }
 841
 842                 return $arr;
 843         }
 844
 845         /**
 846          * If this request is a redirect view, send "redirected from" subtitle to
 847          * the output. Returns true if the header was needed, false if this is not
 848          * a redirect view. Handles both local and remote redirects.
 849          *
 850          * @return bool
 851          */
 852         public function showRedirectedFromHeader() {
 853                 global $wgRedirectSources;
 854
 855                 $context = $this->getContext();
 856                 $outputPage = $context->getOutput();
 857                 $request = $context->getRequest();
 858                 $rdfrom = $request->getVal( 'rdfrom' );
 859
 860                 // Construct a URL for the current page view, but with the target title
 861                 $query = $request->getValues();
 862                 unset( $query['rdfrom'] );
 863                 unset( $query['title'] );
 864                 if ( $this->getTitle()->isRedirect() ) {
 865                         // Prevent double redirects
 866                         $query['redirect'] = 'no';
 867                 }
 868                 $redirectTargetUrl = $this->getTitle()->getLinkURL( $query );
 869
 870                 if ( isset( $this->mRedirectedFrom ) ) {
 871                         // Avoid PHP 7.1 warning of passing $this by reference
 872                         $articlePage = $this;
 873
 874                         // This is an internally redirected page view.
 875                         // We'll need a backlink to the source page for navigation.
 876                         if ( Hooks::run( 'ArticleViewRedirect', [ &$articlePage ] ) ) {
 877                                 $redir = Linker::linkKnown(
 878                                         $this->mRedirectedFrom,
 879                                         null,
 880                                         [],
 881                                         [ 'redirect' => 'no' ]
 882                                 );
 883
 884                                 $outputPage->addSubtitle( "<span class=\"mw-redirectedfrom\">" .
 885                                         $context->msg( 'redirectedfrom' )->rawParams( $redir )->parse()
 886                                 . "</span>" );
 887
 888                                 // Add the script to update the displayed URL and
 889                                 // set the fragment if one was specified in the redirect
 890                                 $outputPage->addJsConfigVars( [
 891                                         'wgInternalRedirectTargetUrl' => $redirectTargetUrl,
 892                                 ] );
 893                                 $outputPage->addModules( 'mediawiki.action.view.redirect' );
 894
 895                                 // Add a <link rel="canonical"> tag
 896                                 $outputPage->setCanonicalUrl( $this->getTitle()->getCanonicalURL() );
 897
 898                                 // Tell the output object that the user arrived at this article through a redirect
 899                                 $outputPage->setRedirectedFrom( $this->mRedirectedFrom );
 900
 901                                 return true;
 902                         }
 903                 } elseif ( $rdfrom ) {
 904                         // This is an externally redirected view, from some other wiki.
 905                         // If it was reported from a trusted site, supply a backlink.
 906                         if ( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 907                                 $redir = Linker::makeExternalLink( $rdfrom, $rdfrom );
 908                                 $outputPage->addSubtitle( "<span class=\"mw-redirectedfrom\">" .
 909                                         $context->msg( 'redirectedfrom' )->rawParams( $redir )->parse()
 910                                 . "</span>" );
 911
 912                                 // Add the script to update the displayed URL
 913                                 $outputPage->addJsConfigVars( [
 914                                         'wgInternalRedirectTargetUrl' => $redirectTargetUrl,
 915                                 ] );
 916                                 $outputPage->addModules( 'mediawiki.action.view.redirect' );
 917
 918                                 return true;
 919                         }
 920                 }
 921
 922                 return false;
 923         }
 924
 925         /**
 926          * Show a header specific to the namespace currently being viewed, like
 927          * [[MediaWiki:Talkpagetext]]. For Article::view().
 928          */
 929         public function showNamespaceHeader() {
 930                 if ( $this->getTitle()->isTalkPage() ) {
 931                         if ( !wfMessage( 'talkpageheader' )->isDisabled() ) {
 932                                 $this->getContext()->getOutput()->wrapWikiMsg(
 933                                         "<div class=\"mw-talkpageheader\">\n$1\n</div>",
 934                                         [ 'talkpageheader' ]
 935                                 );
 936                         }
 937                 }
 938         }
 939
 940         /**
 941          * Show the footer section of an ordinary page view
 942          */
 943         public function showViewFooter() {
 944                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 945                 if ( $this->getTitle()->getNamespace() == NS_USER_TALK
 946                         && IP::isValid( $this->getTitle()->getText() )
 947                 ) {
 948                         $this->getContext()->getOutput()->addWikiMsg( 'anontalkpagetext' );
 949                 }
 950
 951                 // Show a footer allowing the user to patrol the shown revision or page if possible
 952                 $patrolFooterShown = $this->showPatrolFooter();
 953
 954                 Hooks::run( 'ArticleViewFooter', [ $this, $patrolFooterShown ] );
 955         }
 956
 957         /**
 958          * If patrol is possible, output a patrol UI box. This is called from the
 959          * footer section of ordinary page views. If patrol is not possible or not
 960          * desired, does nothing.
 961          * Side effect: When the patrol link is build, this method will call
 962          * OutputPage::preventClickjacking() and load mediawiki.page.patrol.ajax.
 963          *
 964          * @return bool
 965          */
 966         public function showPatrolFooter() {
 967                 global $wgUseNPPatrol, $wgUseRCPatrol, $wgUseFilePatrol, $wgEnableAPI, $wgEnableWriteAPI;
 968
 969                 $outputPage = $this->getContext()->getOutput();
 970                 $user = $this->getContext()->getUser();
 971                 $title = $this->getTitle();
 972                 $rc = false;
 973
 974                 if ( !$title->quickUserCan( 'patrol', $user )
 975                         || !( $wgUseRCPatrol || $wgUseNPPatrol
 976                                 || ( $wgUseFilePatrol && $title->inNamespace( NS_FILE ) ) )
 977                 ) {
 978                         // Patrolling is disabled or the user isn't allowed to
 979                         return false;
 980                 }
 981
 982                 if ( $this->mRevision
 983                         && !RecentChange::isInRCLifespan( $this->mRevision->getTimestamp(), 21600 )
 984                 ) {
 985                         // The current revision is already older than what could be in the RC table
 986                         // 6h tolerance because the RC might not be cleaned out regularly
 987                         return false;
 988                 }
 989
 990                 // Check for cached results
 991                 $key = wfMemcKey( 'unpatrollable-page', $title->getArticleID() );
 992                 $cache = ObjectCache::getMainWANInstance();
 993                 if ( $cache->get( $key ) ) {
 994                         return false;
 995                 }
 996
 997                 $dbr = wfGetDB( DB_REPLICA );
 998                 $oldestRevisionTimestamp = $dbr->selectField(
 999                         'revision',
1000                         'MIN( rev_timestamp )',
1001                         [ 'rev_page' => $title->getArticleID() ],
1002                         __METHOD__
1003                 );
1004
1005                 // New page patrol: Get the timestamp of the oldest revison which
1006                 // the revision table holds for the given page. Then we look
1007                 // whether it's within the RC lifespan and if it is, we try
1008                 // to get the recentchanges row belonging to that entry
1009                 // (with rc_new = 1).
1010                 $recentPageCreation = false;
1011                 if ( $oldestRevisionTimestamp
1012                         && RecentChange::isInRCLifespan( $oldestRevisionTimestamp, 21600 )
1013                 ) {
1014                         // 6h tolerance because the RC might not be cleaned out regularly
1015                         $recentPageCreation = true;
1016                         $rc = RecentChange::newFromConds(
1017                                 [
1018                                         'rc_new' => 1,
1019                                         'rc_timestamp' => $oldestRevisionTimestamp,
1020                                         'rc_namespace' => $title->getNamespace(),
1021                                         'rc_cur_id' => $title->getArticleID()
1022                                 ],
1023                                 __METHOD__
1024                         );
1025                         if ( $rc ) {
1026                                 // Use generic patrol message for new pages
1027                                 $markPatrolledMsg = wfMessage( 'markaspatrolledtext' );
1028                         }
1029                 }
1030
1031                 // File patrol: Get the timestamp of the latest upload for this page,
1032                 // check whether it is within the RC lifespan and if it is, we try
1033                 // to get the recentchanges row belonging to that entry
1034                 // (with rc_type = RC_LOG, rc_log_type = upload).
1035                 $recentFileUpload = false;
1036                 if ( ( !$rc || $rc->getAttribute( 'rc_patrolled' ) ) && $wgUseFilePatrol
1037                         && $title->getNamespace() === NS_FILE ) {
1038                         // Retrieve timestamp of most recent upload
1039                         $newestUploadTimestamp = $dbr->selectField(
1040                                 'image',
1041                                 'MAX( img_timestamp )',
1042                                 [ 'img_name' => $title->getDBkey() ],
1043                                 __METHOD__
1044                         );
1045                         if ( $newestUploadTimestamp
1046                                 && RecentChange::isInRCLifespan( $newestUploadTimestamp, 21600 )
1047                         ) {
1048                                 // 6h tolerance because the RC might not be cleaned out regularly
1049                                 $recentFileUpload = true;
1050                                 $rc = RecentChange::newFromConds(
1051                                         [
1052                                                 'rc_type' => RC_LOG,
1053                                                 'rc_log_type' => 'upload',
1054                                                 'rc_timestamp' => $newestUploadTimestamp,
1055                                                 'rc_namespace' => NS_FILE,
1056                                                 'rc_cur_id' => $title->getArticleID()
1057                                         ],
1058                                         __METHOD__,
1059                                         [ 'USE INDEX' => 'rc_timestamp' ]
1060                                 );
1061                                 if ( $rc ) {
1062                                         // Use patrol message specific to files
1063                                         $markPatrolledMsg = wfMessage( 'markaspatrolledtext-file' );
1064                                 }
1065                         }
1066                 }
1067
1068                 if ( !$recentPageCreation && !$recentFileUpload ) {
1069                         // Page creation and latest upload (for files) is too old to be in RC
1070
1071                         // We definitely can't patrol so cache the information
1072                         // When a new file version is uploaded, the cache is cleared
1073                         $cache->set( $key, '1' );
1074
1075                         return false;
1076                 }
1077
1078                 if ( !$rc ) {
1079                         // Don't cache: This can be hit if the page gets accessed very fast after
1080                         // its creation / latest upload or in case we have high replica DB lag. In case
1081                         // the revision is too old, we will already return above.
1082                         return false;
1083                 }
1084
1085                 if ( $rc->getAttribute( 'rc_patrolled' ) ) {
1086                         // Patrolled RC entry around
1087
1088                         // Cache the information we gathered above in case we can't patrol
1089                         // Don't cache in case we can patrol as this could change
1090                         $cache->set( $key, '1' );
1091
1092                         return false;
1093                 }
1094
1095                 if ( $rc->getPerformer()->equals( $user ) ) {
1096                         // Don't show a patrol link for own creations/uploads. If the user could
1097                         // patrol them, they already would be patrolled
1098                         return false;
1099                 }
1100
1101                 $outputPage->preventClickjacking();
1102                 if ( $wgEnableAPI && $wgEnableWriteAPI && $user->isAllowed( 'writeapi' ) ) {
1103                         $outputPage->addModules( 'mediawiki.page.patrol.ajax' );
1104                 }
1105
1106                 $link = Linker::linkKnown(
1107                         $title,
1108                         $markPatrolledMsg->escaped(),
1109                         [],
1110                         [
1111                                 'action' => 'markpatrolled',
1112                                 'rcid' => $rc->getAttribute( 'rc_id' ),
1113                         ]
1114                 );
1115
1116                 $outputPage->addHTML(
1117                         "<div class='patrollink' data-mw='interface'>" .
1118                                 wfMessage( 'markaspatrolledlink' )->rawParams( $link )->escaped() .
1119                         '</div>'
1120                 );
1121
1122                 return true;
1123         }
1124
1125         /**
1126          * Purge the cache used to check if it is worth showing the patrol footer
1127          * For example, it is done during re-uploads when file patrol is used.
1128          * @param int $articleID ID of the article to purge
1129          * @since 1.27
1130          */
1131         public static function purgePatrolFooterCache( $articleID ) {
1132                 $cache = ObjectCache::getMainWANInstance();
1133                 $cache->delete( wfMemcKey( 'unpatrollable-page', $articleID ) );
1134         }
1135
1136         /**
1137          * Show the error text for a missing article. For articles in the MediaWiki
1138          * namespace, show the default message text. To be called from Article::view().
1139          */
1140         public function showMissingArticle() {
1141                 global $wgSend404Code;
1142
1143                 $outputPage = $this->getContext()->getOutput();
1144                 // Whether the page is a root user page of an existing user (but not a subpage)
1145                 $validUserPage = false;
1146
1147                 $title = $this->getTitle();
1148
1149                 # Show info in user (talk) namespace. Does the user exist? Is he blocked?
1150                 if ( $title->getNamespace() == NS_USER
1151                         || $title->getNamespace() == NS_USER_TALK
1152                 ) {
1153                         $rootPart = explode( '/', $title->getText() )[0];
1154                         $user = User::newFromName( $rootPart, false /* allow IP users*/ );
1155                         $ip = User::isIP( $rootPart );
1156                         $block = Block::newFromTarget( $user, $user );
1157
1158                         if ( !( $user && $user->isLoggedIn() ) && !$ip ) { # User does not exist
1159                                 $outputPage->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n\$1\n</div>",
1160                                         [ 'userpage-userdoesnotexist-view', wfEscapeWikiText( $rootPart ) ] );
1161                         } elseif ( !is_null( $block ) && $block->getType() != Block::TYPE_AUTO ) {
1162                                 # Show log extract if the user is currently blocked
1163                                 LogEventsList::showLogExtract(
1164                                         $outputPage,
1165                                         'block',
1166                                         MWNamespace::getCanonicalName( NS_USER ) . ':' . $block->getTarget(),
1167                                         '',
1168                                         [
1169                                                 'lim' => 1,
1170                                                 'showIfEmpty' => false,
1171                                                 'msgKey' => [
1172                                                         'blocked-notice-logextract',
1173                                                         $user->getName() # Support GENDER in notice
1174                                                 ]
1175                                         ]
1176                                 );
1177                                 $validUserPage = !$title->isSubpage();
1178                         } else {
1179                                 $validUserPage = !$title->isSubpage();
1180                         }
1181                 }
1182
1183                 Hooks::run( 'ShowMissingArticle', [ $this ] );
1184
1185                 # Show delete and move logs if there were any such events.
1186                 # The logging query can DOS the site when bots/crawlers cause 404 floods,
1187                 # so be careful showing this. 404 pages must be cheap as they are hard to cache.
1188                 $cache = ObjectCache::getMainStashInstance();
1189                 $key = wfMemcKey( 'page-recent-delete', md5( $title->getPrefixedText() ) );
1190                 $loggedIn = $this->getContext()->getUser()->isLoggedIn();
1191                 if ( $loggedIn || $cache->get( $key ) ) {
1192                         $logTypes = [ 'delete', 'move' ];
1193                         $conds = [ "log_action != 'revision'" ];
1194                         // Give extensions a chance to hide their (unrelated) log entries
1195                         Hooks::run( 'Article::MissingArticleConditions', [ &$conds, $logTypes ] );
1196                         LogEventsList::showLogExtract(
1197                                 $outputPage,
1198                                 $logTypes,
1199                                 $title,
1200                                 '',
1201                                 [
1202                                         'lim' => 10,
1203                                         'conds' => $conds,
1204                                         'showIfEmpty' => false,
1205                                         'msgKey' => [ $loggedIn
1206                                                 ? 'moveddeleted-notice'
1207                                                 : 'moveddeleted-notice-recent'
1208                                         ]
1209                                 ]
1210                         );
1211                 }
1212
1213                 if ( !$this->mPage->hasViewableContent() && $wgSend404Code && !$validUserPage ) {
1214                         // If there's no backing content, send a 404 Not Found
1215                         // for better machine handling of broken links.
1216                         $this->getContext()->getRequest()->response()->statusHeader( 404 );
1217                 }
1218
1219                 // Also apply the robot policy for nonexisting pages (even if a 404 was used for sanity)
1220                 $policy = $this->getRobotPolicy( 'view' );
1221                 $outputPage->setIndexPolicy( $policy['index'] );
1222                 $outputPage->setFollowPolicy( $policy['follow'] );
1223
1224                 $hookResult = Hooks::run( 'BeforeDisplayNoArticleText', [ $this ] );
1225
1226                 if ( !$hookResult ) {
1227                         return;
1228                 }
1229
1230                 # Show error message
1231                 $oldid = $this->getOldID();
1232                 if ( !$oldid && $title->getNamespace() === NS_MEDIAWIKI && $title->hasSourceText() ) {
1233                         $outputPage->addParserOutput( $this->getContentObject()->getParserOutput( $title ) );
1234                 } else {
1235                         if ( $oldid ) {
1236                                 $text = wfMessage( 'missing-revision', $oldid )->plain();
1237                         } elseif ( $title->quickUserCan( 'create', $this->getContext()->getUser() )
1238                                 && $title->quickUserCan( 'edit', $this->getContext()->getUser() )
1239                         ) {
1240                                 $message = $this->getContext()->getUser()->isLoggedIn() ? 'noarticletext' : 'noarticletextanon';
1241                                 $text = wfMessage( $message )->plain();
1242                         } else {
1243                                 $text = wfMessage( 'noarticletext-nopermission' )->plain();
1244                         }
1245
1246                         $dir = $this->getContext()->getLanguage()->getDir();
1247                         $lang = $this->getContext()->getLanguage()->getCode();
1248                         $outputPage->addWikiText( Xml::openElement( 'div', [
1249                                 'class' => "noarticletext mw-content-$dir",
1250                                 'dir' => $dir,
1251                                 'lang' => $lang,
1252                         ] ) . "\n$text\n</div>" );
1253                 }
1254         }
1255
1256         /**
1257          * If the revision requested for view is deleted, check permissions.
1258          * Send either an error message or a warning header to the output.
1259          *
1260          * @return bool True if the view is allowed, false if not.
1261          */
1262         public function showDeletedRevisionHeader() {
1263                 if ( !$this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1264                         // Not deleted
1265                         return true;
1266                 }
1267
1268                 $outputPage = $this->getContext()->getOutput();
1269                 $user = $this->getContext()->getUser();
1270                 // If the user is not allowed to see it...
1271                 if ( !$this->mRevision->userCan( Revision::DELETED_TEXT, $user ) ) {
1272                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1273                                 'rev-deleted-text-permission' );
1274
1275                         return false;
1276                 // If the user needs to confirm that they want to see it...
1277                 } elseif ( $this->getContext()->getRequest()->getInt( 'unhide' ) != 1 ) {
1278                         # Give explanation and add a link to view the revision...
1279                         $oldid = intval( $this->getOldID() );
1280                         $link = $this->getTitle()->getFullURL( "oldid={$oldid}&unhide=1" );
1281                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1282                                 'rev-suppressed-text-unhide' : 'rev-deleted-text-unhide';
1283                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1284                                 [ $msg, $link ] );
1285
1286                         return false;
1287                 // We are allowed to see...
1288                 } else {
1289                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1290                                 'rev-suppressed-text-view' : 'rev-deleted-text-view';
1291                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", $msg );
1292
1293                         return true;
1294                 }
1295         }
1296
1297         /**
1298          * Generate the navigation links when browsing through an article revisions
1299          * It shows the information as:
1300          *   Revision as of \<date\>; view current revision
1301          *   \<- Previous version | Next Version -\>
1302          *
1303          * @param int $oldid Revision ID of this article revision
1304          */
1305         public function setOldSubtitle( $oldid = 0 ) {
1306                 // Avoid PHP 7.1 warning of passing $this by reference
1307                 $articlePage = $this;
1308
1309                 if ( !Hooks::run( 'DisplayOldSubtitle', [ &$articlePage, &$oldid ] ) ) {
1310                         return;
1311                 }
1312
1313                 $context = $this->getContext();
1314                 $unhide = $context->getRequest()->getInt( 'unhide' ) == 1;
1315
1316                 # Cascade unhide param in links for easy deletion browsing
1317                 $extraParams = [];
1318                 if ( $unhide ) {
1319                         $extraParams['unhide'] = 1;
1320                 }
1321
1322                 if ( $this->mRevision && $this->mRevision->getId() === $oldid ) {
1323                         $revision = $this->mRevision;
1324                 } else {
1325                         $revision = Revision::newFromId( $oldid );
1326                 }
1327
1328                 $timestamp = $revision->getTimestamp();
1329
1330                 $current = ( $oldid == $this->mPage->getLatest() );
1331                 $language = $context->getLanguage();
1332                 $user = $context->getUser();
1333
1334                 $td = $language->userTimeAndDate( $timestamp, $user );
1335                 $tddate = $language->userDate( $timestamp, $user );
1336                 $tdtime = $language->userTime( $timestamp, $user );
1337
1338                 # Show user links if allowed to see them. If hidden, then show them only if requested...
1339                 $userlinks = Linker::revUserTools( $revision, !$unhide );
1340
1341                 $infomsg = $current && !$context->msg( 'revision-info-current' )->isDisabled()
1342                         ? 'revision-info-current'
1343                         : 'revision-info';
1344
1345                 $outputPage = $context->getOutput();
1346                 $revisionInfo = "<div id=\"mw-{$infomsg}\">" .
1347                         $context->msg( $infomsg, $td )
1348                                 ->rawParams( $userlinks )
1349                                 ->params( $revision->getId(), $tddate, $tdtime, $revision->getUserText() )
1350                                 ->rawParams( Linker::revComment( $revision, true, true ) )
1351                                 ->parse() .
1352                         "</div>";
1353
1354                 $lnk = $current
1355                         ? $context->msg( 'currentrevisionlink' )->escaped()
1356                         : Linker::linkKnown(
1357                                 $this->getTitle(),
1358                                 $context->msg( 'currentrevisionlink' )->escaped(),
1359                                 [],
1360                                 $extraParams
1361                         );
1362                 $curdiff = $current
1363                         ? $context->msg( 'diff' )->escaped()
1364                         : Linker::linkKnown(
1365                                 $this->getTitle(),
1366                                 $context->msg( 'diff' )->escaped(),
1367                                 [],
1368                                 [
1369                                         'diff' => 'cur',
1370                                         'oldid' => $oldid
1371                                 ] + $extraParams
1372                         );
1373                 $prev = $this->getTitle()->getPreviousRevisionID( $oldid );
1374                 $prevlink = $prev
1375                         ? Linker::linkKnown(
1376                                 $this->getTitle(),
1377                                 $context->msg( 'previousrevision' )->escaped(),
1378                                 [],
1379                                 [
1380                                         'direction' => 'prev',
1381                                         'oldid' => $oldid
1382                                 ] + $extraParams
1383                         )
1384                         : $context->msg( 'previousrevision' )->escaped();
1385                 $prevdiff = $prev
1386                         ? Linker::linkKnown(
1387                                 $this->getTitle(),
1388                                 $context->msg( 'diff' )->escaped(),
1389                                 [],
1390                                 [
1391                                         'diff' => 'prev',
1392                                         'oldid' => $oldid
1393                                 ] + $extraParams
1394                         )
1395                         : $context->msg( 'diff' )->escaped();
1396                 $nextlink = $current
1397                         ? $context->msg( 'nextrevision' )->escaped()
1398                         : Linker::linkKnown(
1399                                 $this->getTitle(),
1400                                 $context->msg( 'nextrevision' )->escaped(),
1401                                 [],
1402                                 [
1403                                         'direction' => 'next',
1404                                         'oldid' => $oldid
1405                                 ] + $extraParams
1406                         );
1407                 $nextdiff = $current
1408                         ? $context->msg( 'diff' )->escaped()
1409                         : Linker::linkKnown(
1410                                 $this->getTitle(),
1411                                 $context->msg( 'diff' )->escaped(),
1412                                 [],
1413                                 [
1414                                         'diff' => 'next',
1415                                         'oldid' => $oldid
1416                                 ] + $extraParams
1417                         );
1418
1419                 $cdel = Linker::getRevDeleteLink( $user, $revision, $this->getTitle() );
1420                 if ( $cdel !== '' ) {
1421                         $cdel .= ' ';
1422                 }
1423
1424                 // the outer div is need for styling the revision info and nav in MobileFrontend
1425                 $outputPage->addSubtitle( "<div class=\"mw-revision\">" . $revisionInfo .
1426                         "<div id=\"mw-revision-nav\">" . $cdel .
1427                         $context->msg( 'revision-nav' )->rawParams(
1428                                 $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff
1429                         )->escaped() . "</div></div>" );
1430         }
1431
1432         /**
1433          * Return the HTML for the top of a redirect page
1434          *
1435          * Chances are you should just be using the ParserOutput from
1436          * WikitextContent::getParserOutput instead of calling this for redirects.
1437          *
1438          * @param Title|array $target Destination(s) to redirect
1439          * @param bool $appendSubtitle [optional]
1440          * @param bool $forceKnown Should the image be shown as a bluelink regardless of existence?
1441          * @return string Containing HTML with redirect link
1442          */
1443         public function viewRedirect( $target, $appendSubtitle = true, $forceKnown = false ) {
1444                 $lang = $this->getTitle()->getPageLanguage();
1445                 $out = $this->getContext()->getOutput();
1446                 if ( $appendSubtitle ) {
1447                         $out->addSubtitle( wfMessage( 'redirectpagesub' ) );
1448                 }
1449                 $out->addModuleStyles( 'mediawiki.action.view.redirectPage' );
1450                 return static::getRedirectHeaderHtml( $lang, $target, $forceKnown );
1451         }
1452
1453         /**
1454          * Return the HTML for the top of a redirect page
1455          *
1456          * Chances are you should just be using the ParserOutput from
1457          * WikitextContent::getParserOutput instead of calling this for redirects.
1458          *
1459          * @since 1.23
1460          * @param Language $lang
1461          * @param Title|array $target Destination(s) to redirect
1462          * @param bool $forceKnown Should the image be shown as a bluelink regardless of existence?
1463          * @return string Containing HTML with redirect link
1464          */
1465         public static function getRedirectHeaderHtml( Language $lang, $target, $forceKnown = false ) {
1466                 if ( !is_array( $target ) ) {
1467                         $target = [ $target ];
1468                 }
1469
1470                 $html = '<ul class="redirectText">';
1471                 /** @var Title $title */
1472                 foreach ( $target as $title ) {
1473                         $html .= '<li>' . Linker::link(
1474                                 $title,
1475                                 htmlspecialchars( $title->getFullText() ),
1476                                 [],
1477                                 // Make sure wiki page redirects are not followed
1478                                 $title->isRedirect() ? [ 'redirect' => 'no' ] : [],
1479                                 ( $forceKnown ? [ 'known', 'noclasses' ] : [] )
1480                         ) . '</li>';
1481                 }
1482                 $html .= '</ul>';
1483
1484                 $redirectToText = wfMessage( 'redirectto' )->inLanguage( $lang )->escaped();
1485
1486                 return '<div class="redirectMsg">' .
1487                         '<p>' . $redirectToText . '</p>' .
1488                         $html .
1489                         '</div>';
1490         }
1491
1492         /**
1493          * Adds help link with an icon via page indicators.
1494          * Link target can be overridden by a local message containing a wikilink:
1495          * the message key is: 'namespace-' + namespace number + '-helppage'.
1496          * @param string $to Target MediaWiki.org page title or encoded URL.
1497          * @param bool $overrideBaseUrl Whether $url is a full URL, to avoid MW.o.
1498          * @since 1.25
1499          */
1500         public function addHelpLink( $to, $overrideBaseUrl = false ) {
1501                 $msg = wfMessage(
1502                         'namespace-' . $this->getTitle()->getNamespace() . '-helppage'
1503                 );
1504
1505                 $out = $this->getContext()->getOutput();
1506                 if ( !$msg->isDisabled() ) {
1507                         $helpUrl = Skin::makeUrl( $msg->plain() );
1508                         $out->addHelpLink( $helpUrl, true );
1509                 } else {
1510                         $out->addHelpLink( $to, $overrideBaseUrl );
1511                 }
1512         }
1513
1514         /**
1515          * Handle action=render
1516          */
1517         public function render() {
1518                 $this->getContext()->getRequest()->response()->header( 'X-Robots-Tag: noindex' );
1519                 $this->getContext()->getOutput()->setArticleBodyOnly( true );
1520                 $this->getContext()->getOutput()->enableSectionEditLinks( false );
1521                 $this->view();
1522         }
1523
1524         /**
1525          * action=protect handler
1526          */
1527         public function protect() {
1528                 $form = new ProtectionForm( $this );
1529                 $form->execute();
1530         }
1531
1532         /**
1533          * action=unprotect handler (alias)
1534          */
1535         public function unprotect() {
1536                 $this->protect();
1537         }
1538
1539         /**
1540          * UI entry point for page deletion
1541          */
1542         public function delete() {
1543                 # This code desperately needs to be totally rewritten
1544
1545                 $title = $this->getTitle();
1546                 $context = $this->getContext();
1547                 $user = $context->getUser();
1548                 $request = $context->getRequest();
1549
1550                 # Check permissions
1551                 $permissionErrors = $title->getUserPermissionsErrors( 'delete', $user );
1552                 if ( count( $permissionErrors ) ) {
1553                         throw new PermissionsError( 'delete', $permissionErrors );
1554                 }
1555
1556                 # Read-only check...
1557                 if ( wfReadOnly() ) {
1558                         throw new ReadOnlyError;
1559                 }
1560
1561                 # Better double-check that it hasn't been deleted yet!
1562                 $this->mPage->loadPageData(
1563                         $request->wasPosted() ? WikiPage::READ_LATEST : WikiPage::READ_NORMAL
1564                 );
1565                 if ( !$this->mPage->exists() ) {
1566                         $deleteLogPage = new LogPage( 'delete' );
1567                         $outputPage = $context->getOutput();
1568                         $outputPage->setPageTitle( $context->msg( 'cannotdelete-title', $title->getPrefixedText() ) );
1569                         $outputPage->wrapWikiMsg( "<div class=\"error mw-error-cannotdelete\">\n$1\n</div>",
1570                                         [ 'cannotdelete', wfEscapeWikiText( $title->getPrefixedText() ) ]
1571                                 );
1572                         $outputPage->addHTML(
1573                                 Xml::element( 'h2', null, $deleteLogPage->getName()->text() )
1574                         );
1575                         LogEventsList::showLogExtract(
1576                                 $outputPage,
1577                                 'delete',
1578                                 $title
1579                         );
1580
1581                         return;
1582                 }
1583
1584                 $deleteReasonList = $request->getText( 'wpDeleteReasonList', 'other' );
1585                 $deleteReason = $request->getText( 'wpReason' );
1586
1587                 if ( $deleteReasonList == 'other' ) {
1588                         $reason = $deleteReason;
1589                 } elseif ( $deleteReason != '' ) {
1590                         // Entry from drop down menu + additional comment
1591                         $colonseparator = wfMessage( 'colon-separator' )->inContentLanguage()->text();
1592                         $reason = $deleteReasonList . $colonseparator . $deleteReason;
1593                 } else {
1594                         $reason = $deleteReasonList;
1595                 }
1596
1597                 if ( $request->wasPosted() && $user->matchEditToken( $request->getVal( 'wpEditToken' ),
1598                         [ 'delete', $this->getTitle()->getPrefixedText() ] )
1599                 ) {
1600                         # Flag to hide all contents of the archived revisions
1601                         $suppress = $request->getVal( 'wpSuppress' ) && $user->isAllowed( 'suppressrevision' );
1602
1603                         $this->doDelete( $reason, $suppress );
1604
1605                         WatchAction::doWatchOrUnwatch( $request->getCheck( 'wpWatch' ), $title, $user );
1606
1607                         return;
1608                 }
1609
1610                 // Generate deletion reason
1611                 $hasHistory = false;
1612                 if ( !$reason ) {
1613                         try {
1614                                 $reason = $this->generateReason( $hasHistory );
1615                         } catch ( Exception $e ) {
1616                                 # if a page is horribly broken, we still want to be able to
1617                                 # delete it. So be lenient about errors here.
1618                                 wfDebug( "Error while building auto delete summary: $e" );
1619                                 $reason = '';
1620                         }
1621                 }
1622
1623                 // If the page has a history, insert a warning
1624                 if ( $hasHistory ) {
1625                         $title = $this->getTitle();
1626
1627                         // The following can use the real revision count as this is only being shown for users
1628                         // that can delete this page.
1629                         // This, as a side-effect, also makes sure that the following query isn't being run for
1630                         // pages with a larger history, unless the user has the 'bigdelete' right
1631                         // (and is about to delete this page).
1632                         $dbr = wfGetDB( DB_REPLICA );
1633                         $revisions = $edits = (int)$dbr->selectField(
1634                                 'revision',
1635                                 'COUNT(rev_page)',
1636                                 [ 'rev_page' => $title->getArticleID() ],
1637                                 __METHOD__
1638                         );
1639
1640                         // @todo FIXME: i18n issue/patchwork message
1641                         $context->getOutput()->addHTML(
1642                                 '<strong class="mw-delete-warning-revisions">' .
1643                                 $context->msg( 'historywarning' )->numParams( $revisions )->parse() .
1644                                 $context->msg( 'word-separator' )->escaped() . Linker::linkKnown( $title,
1645                                         $context->msg( 'history' )->escaped(),
1646                                         [],
1647                                         [ 'action' => 'history' ] ) .
1648                                 '</strong>'
1649                         );
1650
1651                         if ( $title->isBigDeletion() ) {
1652                                 global $wgDeleteRevisionsLimit;
1653                                 $context->getOutput()->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
1654                                         [
1655                                                 'delete-warning-toobig',
1656                                                 $context->getLanguage()->formatNum( $wgDeleteRevisionsLimit )
1657                                         ]
1658                                 );
1659                         }
1660                 }
1661
1662                 $this->confirmDelete( $reason );
1663         }
1664
1665         /**
1666          * Output deletion confirmation dialog
1667          * @todo FIXME: Move to another file?
1668          * @param string $reason Prefilled reason
1669          */
1670         public function confirmDelete( $reason ) {
1671                 wfDebug( "Article::confirmDelete\n" );
1672
1673                 $title = $this->getTitle();
1674                 $ctx = $this->getContext();
1675                 $outputPage = $ctx->getOutput();
1676                 if ( !wfMessage( 'deletereason-dropdown' )->inContentLanguage()->isDisabled() ) {
1677                         $outputPage->addModules( 'mediawiki.reasonSuggest' );
1678                         $outputPage->addJsConfigVars( [
1679                                 'reasons' => 'deletereason-dropdown'
1680                         ] );
1681                 }
1682                 $useMediaWikiUIEverywhere = $ctx->getConfig()->get( 'UseMediaWikiUIEverywhere' );
1683                 $outputPage->setPageTitle( wfMessage( 'delete-confirm', $title->getPrefixedText() ) );
1684                 $outputPage->addBacklinkSubtitle( $title );
1685                 $outputPage->setRobotPolicy( 'noindex,nofollow' );
1686                 $backlinkCache = $title->getBacklinkCache();
1687                 if ( $backlinkCache->hasLinks( 'pagelinks' ) || $backlinkCache->hasLinks( 'templatelinks' ) ) {
1688                         $outputPage->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1689                                 'deleting-backlinks-warning' );
1690                 }
1691                 $outputPage->addWikiMsg( 'confirmdeletetext' );
1692
1693                 Hooks::run( 'ArticleConfirmDelete', [ $this, $outputPage, &$reason ] );
1694
1695                 $user = $this->getContext()->getUser();
1696
1697                 if ( $user->isAllowed( 'suppressrevision' ) ) {
1698                         $suppress = Html::openElement( 'div', [ 'id' => 'wpDeleteSuppressRow' ] ) .
1699                                 Xml::checkLabel( wfMessage( 'revdelete-suppress' )->text(),
1700                                         'wpSuppress', 'wpSuppress', false, [ 'tabindex' => '4' ] ) .
1701                                 Html::closeElement( 'div' );
1702                 } else {
1703                         $suppress = '';
1704                 }
1705                 $checkWatch = $user->getBoolOption( 'watchdeletion' ) || $user->isWatched( $title );
1706
1707                 $form = Html::openElement( 'form', [ 'method' => 'post',
1708                         'action' => $title->getLocalURL( 'action=delete' ), 'id' => 'deleteconfirm' ] ) .
1709                         Html::openElement( 'fieldset', [ 'id' => 'mw-delete-table' ] ) .
1710                         Html::element( 'legend', null, wfMessage( 'delete-legend' )->text() ) .
1711                         Html::openElement( 'div', [ 'id' => 'mw-deleteconfirm-table' ] ) .
1712                         Html::openElement( 'div', [ 'id' => 'wpDeleteReasonListRow' ] ) .
1713                         Html::label( wfMessage( 'deletecomment' )->text(), 'wpDeleteReasonList' ) .
1714                         '&nbsp;' .
1715                         Xml::listDropDown(
1716                                 'wpDeleteReasonList',
1717                                 wfMessage( 'deletereason-dropdown' )->inContentLanguage()->text(),
1718                                 wfMessage( 'deletereasonotherlist' )->inContentLanguage()->text(),
1719                                 '',
1720                                 'wpReasonDropDown',
1721                                 1
1722                         ) .
1723                         Html::closeElement( 'div' ) .
1724                         Html::openElement( 'div', [ 'id' => 'wpDeleteReasonRow' ] ) .
1725                         Html::label( wfMessage( 'deleteotherreason' )->text(), 'wpReason' ) .
1726                         '&nbsp;' .
1727                         Html::input( 'wpReason', $reason, 'text', [
1728                                 'size' => '60',
1729                                 'maxlength' => '255',
1730                                 'tabindex' => '2',
1731                                 'id' => 'wpReason',
1732                                 'class' => 'mw-ui-input-inline',
1733                                 'autofocus'
1734                         ] ) .
1735                         Html::closeElement( 'div' );
1736
1737                 # Disallow watching if user is not logged in
1738                 if ( $user->isLoggedIn() ) {
1739                         $form .=
1740                                         Xml::checkLabel( wfMessage( 'watchthis' )->text(),
1741                                                 'wpWatch', 'wpWatch', $checkWatch, [ 'tabindex' => '3' ] );
1742                 }
1743
1744                 $form .=
1745                                 Html::openElement( 'div' ) .
1746                                 $suppress .
1747                                         Xml::submitButton( wfMessage( 'deletepage' )->text(),
1748                                                 [
1749                                                         'name' => 'wpConfirmB',
1750                                                         'id' => 'wpConfirmB',
1751                                                         'tabindex' => '5',
1752                                                         'class' => $useMediaWikiUIEverywhere ? 'mw-ui-button mw-ui-destructive' : '',
1753                                                 ]
1754                                         ) .
1755                                 Html::closeElement( 'div' ) .
1756                         Html::closeElement( 'div' ) .
1757                         Xml::closeElement( 'fieldset' ) .
1758                         Html::hidden(
1759                                 'wpEditToken',
1760                                 $user->getEditToken( [ 'delete', $title->getPrefixedText() ] )
1761                         ) .
1762                         Xml::closeElement( 'form' );
1763
1764                         if ( $user->isAllowed( 'editinterface' ) ) {
1765                                 $link = Linker::linkKnown(
1766                                         $ctx->msg( 'deletereason-dropdown' )->inContentLanguage()->getTitle(),
1767                                         wfMessage( 'delete-edit-reasonlist' )->escaped(),
1768                                         [],
1769                                         [ 'action' => 'edit' ]
1770                                 );
1771                                 $form .= '<p class="mw-delete-editreasons">' . $link . '</p>';
1772                         }
1773
1774                 $outputPage->addHTML( $form );
1775
1776                 $deleteLogPage = new LogPage( 'delete' );
1777                 $outputPage->addHTML( Xml::element( 'h2', null, $deleteLogPage->getName()->text() ) );
1778                 LogEventsList::showLogExtract( $outputPage, 'delete', $title );
1779         }
1780
1781         /**
1782          * Perform a deletion and output success or failure messages
1783          * @param string $reason
1784          * @param bool $suppress
1785          */
1786         public function doDelete( $reason, $suppress = false ) {
1787                 $error = '';
1788                 $context = $this->getContext();
1789                 $outputPage = $context->getOutput();
1790                 $user = $context->getUser();
1791                 $status = $this->mPage->doDeleteArticleReal( $reason, $suppress, 0, true, $error, $user );
1792
1793                 if ( $status->isGood() ) {
1794                         $deleted = $this->getTitle()->getPrefixedText();
1795
1796                         $outputPage->setPageTitle( wfMessage( 'actioncomplete' ) );
1797                         $outputPage->setRobotPolicy( 'noindex,nofollow' );
1798
1799                         $loglink = '[[Special:Log/delete|' . wfMessage( 'deletionlog' )->text() . ']]';
1800
1801                         $outputPage->addWikiMsg( 'deletedtext', wfEscapeWikiText( $deleted ), $loglink );
1802
1803                         Hooks::run( 'ArticleDeleteAfterSuccess', [ $this->getTitle(), $outputPage ] );
1804
1805                         $outputPage->returnToMain( false );
1806                 } else {
1807                         $outputPage->setPageTitle(
1808                                 wfMessage( 'cannotdelete-title',
1809                                         $this->getTitle()->getPrefixedText() )
1810                         );
1811
1812                         if ( $error == '' ) {
1813                                 $outputPage->addWikiText(
1814                                         "<div class=\"error mw-error-cannotdelete\">\n" . $status->getWikiText() . "\n</div>"
1815                                 );
1816                                 $deleteLogPage = new LogPage( 'delete' );
1817                                 $outputPage->addHTML( Xml::element( 'h2', null, $deleteLogPage->getName()->text() ) );
1818
1819                                 LogEventsList::showLogExtract(
1820                                         $outputPage,
1821                                         'delete',
1822                                         $this->getTitle()
1823                                 );
1824                         } else {
1825                                 $outputPage->addHTML( $error );
1826                         }
1827                 }
1828         }
1829
1830         /* Caching functions */
1831
1832         /**
1833          * checkLastModified returns true if it has taken care of all
1834          * output to the client that is necessary for this request.
1835          * (that is, it has sent a cached version of the page)
1836          *
1837          * @return bool True if cached version send, false otherwise
1838          */
1839         protected function tryFileCache() {
1840                 static $called = false;
1841
1842                 if ( $called ) {
1843                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
1844                         return false;
1845                 }
1846
1847                 $called = true;
1848                 if ( $this->isFileCacheable() ) {
1849                         $cache = new HTMLFileCache( $this->getTitle(), 'view' );
1850                         if ( $cache->isCacheGood( $this->mPage->getTouched() ) ) {
1851                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
1852                                 $cache->loadFromFileCache( $this->getContext() );
1853                                 return true;
1854                         } else {
1855                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
1856                                 ob_start( [ &$cache, 'saveToFileCache' ] );
1857                         }
1858                 } else {
1859                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
1860                 }
1861
1862                 return false;
1863         }
1864
1865         /**
1866          * Check if the page can be cached
1867          * @param integer $mode One of the HTMLFileCache::MODE_* constants (since 1.28)
1868          * @return bool
1869          */
1870         public function isFileCacheable( $mode = HTMLFileCache::MODE_NORMAL ) {
1871                 $cacheable = false;
1872
1873                 if ( HTMLFileCache::useFileCache( $this->getContext(), $mode ) ) {
1874                         $cacheable = $this->mPage->getId()
1875                                 && !$this->mRedirectedFrom && !$this->getTitle()->isRedirect();
1876                         // Extension may have reason to disable file caching on some pages.
1877                         if ( $cacheable ) {
1878                                 // Avoid PHP 7.1 warning of passing $this by reference
1879                                 $articlePage = $this;
1880                                 $cacheable = Hooks::run( 'IsFileCacheable', [ &$articlePage ] );
1881                         }
1882                 }
1883
1884                 return $cacheable;
1885         }
1886
1887         /**#@-*/
1888
1889         /**
1890          * Lightweight method to get the parser output for a page, checking the parser cache
1891          * and so on. Doesn't consider most of the stuff that WikiPage::view is forced to
1892          * consider, so it's not appropriate to use there.
1893          *
1894          * @since 1.16 (r52326) for LiquidThreads
1895          *
1896          * @param int|null $oldid Revision ID or null
1897          * @param User $user The relevant user
1898          * @return ParserOutput|bool ParserOutput or false if the given revision ID is not found
1899          */
1900         public function getParserOutput( $oldid = null, User $user = null ) {
1901                 // XXX: bypasses mParserOptions and thus setParserOptions()
1902
1903                 if ( $user === null ) {
1904                         $parserOptions = $this->getParserOptions();
1905                 } else {
1906                         $parserOptions = $this->mPage->makeParserOptions( $user );
1907                 }
1908
1909                 return $this->mPage->getParserOutput( $parserOptions, $oldid );
1910         }
1911
1912         /**
1913          * Override the ParserOptions used to render the primary article wikitext.
1914          *
1915          * @param ParserOptions $options
1916          * @throws MWException If the parser options where already initialized.
1917          */
1918         public function setParserOptions( ParserOptions $options ) {
1919                 if ( $this->mParserOptions ) {
1920                         throw new MWException( "can't change parser options after they have already been set" );
1921                 }
1922
1923                 // clone, so if $options is modified later, it doesn't confuse the parser cache.
1924                 $this->mParserOptions = clone $options;
1925         }
1926
1927         /**
1928          * Get parser options suitable for rendering the primary article wikitext
1929          * @return ParserOptions
1930          */
1931         public function getParserOptions() {
1932                 if ( !$this->mParserOptions ) {
1933                         $this->mParserOptions = $this->mPage->makeParserOptions( $this->getContext() );
1934                 }
1935                 // Clone to allow modifications of the return value without affecting cache
1936                 return clone $this->mParserOptions;
1937         }
1938
1939         /**
1940          * Sets the context this Article is executed in
1941          *
1942          * @param IContextSource $context
1943          * @since 1.18
1944          */
1945         public function setContext( $context ) {
1946                 $this->mContext = $context;
1947         }
1948
1949         /**
1950          * Gets the context this Article is executed in
1951          *
1952          * @return IContextSource
1953          * @since 1.18
1954          */
1955         public function getContext() {
1956                 if ( $this->mContext instanceof IContextSource ) {
1957                         return $this->mContext;
1958                 } else {
1959                         wfDebug( __METHOD__ . " called and \$mContext is null. " .
1960                                 "Return RequestContext::getMain(); for sanity\n" );
1961                         return RequestContext::getMain();
1962                 }
1963         }
1964
1965         /**
1966          * Use PHP's magic __get handler to handle accessing of
1967          * raw WikiPage fields for backwards compatibility.
1968          *
1969          * @param string $fname Field name
1970          * @return mixed
1971          */
1972         public function __get( $fname ) {
1973                 if ( property_exists( $this->mPage, $fname ) ) {
1974                         # wfWarn( "Access to raw $fname field " . __CLASS__ );
1975                         return $this->mPage->$fname;
1976                 }
1977                 trigger_error( 'Inaccessible property via __get(): ' . $fname, E_USER_NOTICE );
1978         }
1979
1980         /**
1981          * Use PHP's magic __set handler to handle setting of
1982          * raw WikiPage fields for backwards compatibility.
1983          *
1984          * @param string $fname Field name
1985          * @param mixed $fvalue New value
1986          */
1987         public function __set( $fname, $fvalue ) {
1988                 if ( property_exists( $this->mPage, $fname ) ) {
1989                         # wfWarn( "Access to raw $fname field of " . __CLASS__ );
1990                         $this->mPage->$fname = $fvalue;
1991                 // Note: extensions may want to toss on new fields
1992                 } elseif ( !in_array( $fname, [ 'mContext', 'mPage' ] ) ) {
1993                         $this->mPage->$fname = $fvalue;
1994                 } else {
1995                         trigger_error( 'Inaccessible property via __set(): ' . $fname, E_USER_NOTICE );
1996                 }
1997         }
1998
1999         /**
2000          * Call to WikiPage function for backwards compatibility.
2001          * @see WikiPage::checkFlags
2002          */
2003         public function checkFlags( $flags ) {
2004                 return $this->mPage->checkFlags( $flags );
2005         }
2006
2007         /**
2008          * Call to WikiPage function for backwards compatibility.
2009          * @see WikiPage::checkTouched
2010          */
2011         public function checkTouched() {
2012                 return $this->mPage->checkTouched();
2013         }
2014
2015         /**
2016          * Call to WikiPage function for backwards compatibility.
2017          * @see WikiPage::clearPreparedEdit
2018          */
2019         public function clearPreparedEdit() {
2020                 $this->mPage->clearPreparedEdit();
2021         }
2022
2023         /**
2024          * Call to WikiPage function for backwards compatibility.
2025          * @see WikiPage::doDeleteArticleReal
2026          */
2027         public function doDeleteArticleReal(
2028                 $reason, $suppress = false, $u1 = null, $u2 = null, &$error = '', User $user = null,
2029                 $tags = []
2030         ) {
2031                 return $this->mPage->doDeleteArticleReal(
2032                         $reason, $suppress, $u1, $u2, $error, $user, $tags
2033                 );
2034         }
2035
2036         /**
2037          * Call to WikiPage function for backwards compatibility.
2038          * @see WikiPage::doDeleteUpdates
2039          */
2040         public function doDeleteUpdates( $id, Content $content = null ) {
2041                 return $this->mPage->doDeleteUpdates( $id, $content );
2042         }
2043
2044         /**
2045          * Call to WikiPage function for backwards compatibility.
2046          * @see WikiPage::doEdit
2047          *
2048          * @deprecated since 1.21: use doEditContent() instead.
2049          */
2050         public function doEdit( $text, $summary, $flags = 0, $baseRevId = false, $user = null ) {
2051                 wfDeprecated( __METHOD__, '1.21' );
2052                 return $this->mPage->doEdit( $text, $summary, $flags, $baseRevId, $user );
2053         }
2054
2055         /**
2056          * Call to WikiPage function for backwards compatibility.
2057          * @see WikiPage::doEditContent
2058          */
2059         public function doEditContent( Content $content, $summary, $flags = 0, $baseRevId = false,
2060                 User $user = null, $serialFormat = null
2061         ) {
2062                 return $this->mPage->doEditContent( $content, $summary, $flags, $baseRevId,
2063                         $user, $serialFormat
2064                 );
2065         }
2066
2067         /**
2068          * Call to WikiPage function for backwards compatibility.
2069          * @see WikiPage::doEditUpdates
2070          */
2071         public function doEditUpdates( Revision $revision, User $user, array $options = [] ) {
2072                 return $this->mPage->doEditUpdates( $revision, $user, $options );
2073         }
2074
2075         /**
2076          * Call to WikiPage function for backwards compatibility.
2077          * @see WikiPage::doPurge
2078          */
2079         public function doPurge( $flags = WikiPage::PURGE_ALL ) {
2080                 return $this->mPage->doPurge( $flags );
2081         }
2082
2083         /**
2084          * Call to WikiPage function for backwards compatibility.
2085          * @see WikiPage::getLastPurgeTimestamp
2086          */
2087         public function getLastPurgeTimestamp() {
2088                 return $this->mPage->getLastPurgeTimestamp();
2089         }
2090
2091         /**
2092          * Call to WikiPage function for backwards compatibility.
2093          * @see WikiPage::doViewUpdates
2094          */
2095         public function doViewUpdates( User $user, $oldid = 0 ) {
2096                 $this->mPage->doViewUpdates( $user, $oldid );
2097         }
2098
2099         /**
2100          * Call to WikiPage function for backwards compatibility.
2101          * @see WikiPage::exists
2102          */
2103         public function exists() {
2104                 return $this->mPage->exists();
2105         }
2106
2107         /**
2108          * Call to WikiPage function for backwards compatibility.
2109          * @see WikiPage::followRedirect
2110          */
2111         public function followRedirect() {
2112                 return $this->mPage->followRedirect();
2113         }
2114
2115         /**
2116          * Call to WikiPage function for backwards compatibility.
2117          * @see ContentHandler::getActionOverrides
2118          */
2119         public function getActionOverrides() {
2120                 return $this->mPage->getActionOverrides();
2121         }
2122
2123         /**
2124          * Call to WikiPage function for backwards compatibility.
2125          * @see WikiPage::getAutoDeleteReason
2126          */
2127         public function getAutoDeleteReason( &$hasHistory ) {
2128                 return $this->mPage->getAutoDeleteReason( $hasHistory );
2129         }
2130
2131         /**
2132          * Call to WikiPage function for backwards compatibility.
2133          * @see WikiPage::getCategories
2134          */
2135         public function getCategories() {
2136                 return $this->mPage->getCategories();
2137         }
2138
2139         /**
2140          * Call to WikiPage function for backwards compatibility.
2141          * @see WikiPage::getComment
2142          */
2143         public function getComment( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2144                 return $this->mPage->getComment( $audience, $user );
2145         }
2146
2147         /**
2148          * Call to WikiPage function for backwards compatibility.
2149          * @see WikiPage::getContentHandler
2150          */
2151         public function getContentHandler() {
2152                 return $this->mPage->getContentHandler();
2153         }
2154
2155         /**
2156          * Call to WikiPage function for backwards compatibility.
2157          * @see WikiPage::getContentModel
2158          */
2159         public function getContentModel() {
2160                 return $this->mPage->getContentModel();
2161         }
2162
2163         /**
2164          * Call to WikiPage function for backwards compatibility.
2165          * @see WikiPage::getContributors
2166          */
2167         public function getContributors() {
2168                 return $this->mPage->getContributors();
2169         }
2170
2171         /**
2172          * Call to WikiPage function for backwards compatibility.
2173          * @see WikiPage::getCreator
2174          */
2175         public function getCreator( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2176                 return $this->mPage->getCreator( $audience, $user );
2177         }
2178
2179         /**
2180          * Call to WikiPage function for backwards compatibility.
2181          * @see WikiPage::getDeletionUpdates
2182          */
2183         public function getDeletionUpdates( Content $content = null ) {
2184                 return $this->mPage->getDeletionUpdates( $content );
2185         }
2186
2187         /**
2188          * Call to WikiPage function for backwards compatibility.
2189          * @see WikiPage::getHiddenCategories
2190          */
2191         public function getHiddenCategories() {
2192                 return $this->mPage->getHiddenCategories();
2193         }
2194
2195         /**
2196          * Call to WikiPage function for backwards compatibility.
2197          * @see WikiPage::getId
2198          */
2199         public function getId() {
2200                 return $this->mPage->getId();
2201         }
2202
2203         /**
2204          * Call to WikiPage function for backwards compatibility.
2205          * @see WikiPage::getLatest
2206          */
2207         public function getLatest() {
2208                 return $this->mPage->getLatest();
2209         }
2210
2211         /**
2212          * Call to WikiPage function for backwards compatibility.
2213          * @see WikiPage::getLinksTimestamp
2214          */
2215         public function getLinksTimestamp() {
2216                 return $this->mPage->getLinksTimestamp();
2217         }
2218
2219         /**
2220          * Call to WikiPage function for backwards compatibility.
2221          * @see WikiPage::getMinorEdit
2222          */
2223         public function getMinorEdit() {
2224                 return $this->mPage->getMinorEdit();
2225         }
2226
2227         /**
2228          * Call to WikiPage function for backwards compatibility.
2229          * @see WikiPage::getOldestRevision
2230          */
2231         public function getOldestRevision() {
2232                 return $this->mPage->getOldestRevision();
2233         }
2234
2235         /**
2236          * Call to WikiPage function for backwards compatibility.
2237          * @see WikiPage::getRedirectTarget
2238          */
2239         public function getRedirectTarget() {
2240                 return $this->mPage->getRedirectTarget();
2241         }
2242
2243         /**
2244          * Call to WikiPage function for backwards compatibility.
2245          * @see WikiPage::getRedirectURL
2246          */
2247         public function getRedirectURL( $rt ) {
2248                 return $this->mPage->getRedirectURL( $rt );
2249         }
2250
2251         /**
2252          * Call to WikiPage function for backwards compatibility.
2253          * @see WikiPage::getRevision
2254          */
2255         public function getRevision() {
2256                 return $this->mPage->getRevision();
2257         }
2258
2259         /**
2260          * Call to WikiPage function for backwards compatibility.
2261          * @see WikiPage::getTimestamp
2262          */
2263         public function getTimestamp() {
2264                 return $this->mPage->getTimestamp();
2265         }
2266
2267         /**
2268          * Call to WikiPage function for backwards compatibility.
2269          * @see WikiPage::getTouched
2270          */
2271         public function getTouched() {
2272                 return $this->mPage->getTouched();
2273         }
2274
2275         /**
2276          * Call to WikiPage function for backwards compatibility.
2277          * @see WikiPage::getUndoContent
2278          */
2279         public function getUndoContent( Revision $undo, Revision $undoafter = null ) {
2280                 return $this->mPage->getUndoContent( $undo, $undoafter );
2281         }
2282
2283         /**
2284          * Call to WikiPage function for backwards compatibility.
2285          * @see WikiPage::getUser
2286          */
2287         public function getUser( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2288                 return $this->mPage->getUser( $audience, $user );
2289         }
2290
2291         /**
2292          * Call to WikiPage function for backwards compatibility.
2293          * @see WikiPage::getUserText
2294          */
2295         public function getUserText( $audience = Revision::FOR_PUBLIC, User $user = null ) {
2296                 return $this->mPage->getUserText( $audience, $user );
2297         }
2298
2299         /**
2300          * Call to WikiPage function for backwards compatibility.
2301          * @see WikiPage::hasViewableContent
2302          */
2303         public function hasViewableContent() {
2304                 return $this->mPage->hasViewableContent();
2305         }
2306
2307         /**
2308          * Call to WikiPage function for backwards compatibility.
2309          * @see WikiPage::insertOn
2310          */
2311         public function insertOn( $dbw, $pageId = null ) {
2312                 return $this->mPage->insertOn( $dbw, $pageId );
2313         }
2314
2315         /**
2316          * Call to WikiPage function for backwards compatibility.
2317          * @see WikiPage::insertProtectNullRevision
2318          */
2319         public function insertProtectNullRevision( $revCommentMsg, array $limit,
2320                 array $expiry, $cascade, $reason, $user = null
2321         ) {
2322                 return $this->mPage->insertProtectNullRevision( $revCommentMsg, $limit,
2323                         $expiry, $cascade, $reason, $user
2324                 );
2325         }
2326
2327         /**
2328          * Call to WikiPage function for backwards compatibility.
2329          * @see WikiPage::insertRedirect
2330          */
2331         public function insertRedirect() {
2332                 return $this->mPage->insertRedirect();
2333         }
2334
2335         /**
2336          * Call to WikiPage function for backwards compatibility.
2337          * @see WikiPage::insertRedirectEntry
2338          */
2339         public function insertRedirectEntry( Title $rt, $oldLatest = null ) {
2340                 return $this->mPage->insertRedirectEntry( $rt, $oldLatest );
2341         }
2342
2343         /**
2344          * Call to WikiPage function for backwards compatibility.
2345          * @see WikiPage::isCountable
2346          */
2347         public function isCountable( $editInfo = false ) {
2348                 return $this->mPage->isCountable( $editInfo );
2349         }
2350
2351         /**
2352          * Call to WikiPage function for backwards compatibility.
2353          * @see WikiPage::isRedirect
2354          */
2355         public function isRedirect() {
2356                 return $this->mPage->isRedirect();
2357         }
2358
2359         /**
2360          * Call to WikiPage function for backwards compatibility.
2361          * @see WikiPage::loadFromRow
2362          */
2363         public function loadFromRow( $data, $from ) {
2364                 return $this->mPage->loadFromRow( $data, $from );
2365         }
2366
2367         /**
2368          * Call to WikiPage function for backwards compatibility.
2369          * @see WikiPage::loadPageData
2370          */
2371         public function loadPageData( $from = 'fromdb' ) {
2372                 $this->mPage->loadPageData( $from );
2373         }
2374
2375         /**
2376          * Call to WikiPage function for backwards compatibility.
2377          * @see WikiPage::lockAndGetLatest
2378          */
2379         public function lockAndGetLatest() {
2380                 return $this->mPage->lockAndGetLatest();
2381         }
2382
2383         /**
2384          * Call to WikiPage function for backwards compatibility.
2385          * @see WikiPage::makeParserOptions
2386          */
2387         public function makeParserOptions( $context ) {
2388                 return $this->mPage->makeParserOptions( $context );
2389         }
2390
2391         /**
2392          * Call to WikiPage function for backwards compatibility.
2393          * @see WikiPage::pageDataFromId
2394          */
2395         public function pageDataFromId( $dbr, $id, $options = [] ) {
2396                 return $this->mPage->pageDataFromId( $dbr, $id, $options );
2397         }
2398
2399         /**
2400          * Call to WikiPage function for backwards compatibility.
2401          * @see WikiPage::pageDataFromTitle
2402          */
2403         public function pageDataFromTitle( $dbr, $title, $options = [] ) {
2404                 return $this->mPage->pageDataFromTitle( $dbr, $title, $options );
2405         }
2406
2407         /**
2408          * Call to WikiPage function for backwards compatibility.
2409          * @see WikiPage::prepareContentForEdit
2410          */
2411         public function prepareContentForEdit(
2412                 Content $content, $revision = null, User $user = null,
2413                 $serialFormat = null, $useCache = true
2414         ) {
2415                 return $this->mPage->prepareContentForEdit(
2416                         $content, $revision, $user,
2417                         $serialFormat, $useCache
2418                 );
2419         }
2420
2421         /**
2422          * Call to WikiPage function for backwards compatibility.
2423          * @see WikiPage::protectDescription
2424          */
2425         public function protectDescription( array $limit, array $expiry ) {
2426                 return $this->mPage->protectDescription( $limit, $expiry );
2427         }
2428
2429         /**
2430          * Call to WikiPage function for backwards compatibility.
2431          * @see WikiPage::protectDescriptionLog
2432          */
2433         public function protectDescriptionLog( array $limit, array $expiry ) {
2434                 return $this->mPage->protectDescriptionLog( $limit, $expiry );
2435         }
2436
2437         /**
2438          * Call to WikiPage function for backwards compatibility.
2439          * @see WikiPage::replaceSectionAtRev
2440          */
2441         public function replaceSectionAtRev( $sectionId, Content $sectionContent,
2442                 $sectionTitle = '', $baseRevId = null
2443         ) {
2444                 return $this->mPage->replaceSectionAtRev( $sectionId, $sectionContent,
2445                         $sectionTitle, $baseRevId
2446                 );
2447         }
2448
2449         /**
2450          * Call to WikiPage function for backwards compatibility.
2451          * @see WikiPage::replaceSectionContent
2452          */
2453         public function replaceSectionContent(
2454                 $sectionId, Content $sectionContent, $sectionTitle = '', $edittime = null
2455         ) {
2456                 return $this->mPage->replaceSectionContent(
2457                         $sectionId, $sectionContent, $sectionTitle, $edittime
2458                 );
2459         }
2460
2461         /**
2462          * Call to WikiPage function for backwards compatibility.
2463          * @see WikiPage::setTimestamp
2464          */
2465         public function setTimestamp( $ts ) {
2466                 return $this->mPage->setTimestamp( $ts );
2467         }
2468
2469         /**
2470          * Call to WikiPage function for backwards compatibility.
2471          * @see WikiPage::shouldCheckParserCache
2472          */
2473         public function shouldCheckParserCache( ParserOptions $parserOptions, $oldId ) {
2474                 return $this->mPage->shouldCheckParserCache( $parserOptions, $oldId );
2475         }
2476
2477         /**
2478          * Call to WikiPage function for backwards compatibility.
2479          * @see WikiPage::supportsSections
2480          */
2481         public function supportsSections() {
2482                 return $this->mPage->supportsSections();
2483         }
2484
2485         /**
2486          * Call to WikiPage function for backwards compatibility.
2487          * @see WikiPage::triggerOpportunisticLinksUpdate
2488          */
2489         public function triggerOpportunisticLinksUpdate( ParserOutput $parserOutput ) {
2490                 return $this->mPage->triggerOpportunisticLinksUpdate( $parserOutput );
2491         }
2492
2493         /**
2494          * Call to WikiPage function for backwards compatibility.
2495          * @see WikiPage::updateCategoryCounts
2496          */
2497         public function updateCategoryCounts( array $added, array $deleted, $id = 0 ) {
2498                 return $this->mPage->updateCategoryCounts( $added, $deleted, $id );
2499         }
2500
2501         /**
2502          * Call to WikiPage function for backwards compatibility.
2503          * @see WikiPage::updateIfNewerOn
2504          */
2505         public function updateIfNewerOn( $dbw, $revision ) {
2506                 return $this->mPage->updateIfNewerOn( $dbw, $revision );
2507         }
2508
2509         /**
2510          * Call to WikiPage function for backwards compatibility.
2511          * @see WikiPage::updateRedirectOn
2512          */
2513         public function updateRedirectOn( $dbw, $redirectTitle, $lastRevIsRedirect = null ) {
2514                 return $this->mPage->updateRedirectOn( $dbw, $redirectTitle, $lastRevIsRedirect = null );
2515         }
2516
2517         /**
2518          * Call to WikiPage function for backwards compatibility.
2519          * @see WikiPage::updateRevisionOn
2520          */
2521         public function updateRevisionOn( $dbw, $revision, $lastRevision = null,
2522                 $lastRevIsRedirect = null
2523         ) {
2524                 return $this->mPage->updateRevisionOn( $dbw, $revision, $lastRevision,
2525                         $lastRevIsRedirect
2526                 );
2527         }
2528
2529         /**
2530          * @param array $limit
2531          * @param array $expiry
2532          * @param bool $cascade
2533          * @param string $reason
2534          * @param User $user
2535          * @return Status
2536          */
2537         public function doUpdateRestrictions( array $limit, array $expiry, &$cascade,
2538                 $reason, User $user
2539         ) {
2540                 return $this->mPage->doUpdateRestrictions( $limit, $expiry, $cascade, $reason, $user );
2541         }
2542
2543         /**
2544          * @param array $limit
2545          * @param string $reason
2546          * @param int $cascade
2547          * @param array $expiry
2548          * @return bool
2549          */
2550         public function updateRestrictions( $limit = [], $reason = '',
2551                 &$cascade = 0, $expiry = []
2552         ) {
2553                 return $this->mPage->doUpdateRestrictions(
2554                         $limit,
2555                         $expiry,
2556                         $cascade,
2557                         $reason,
2558                         $this->getContext()->getUser()
2559                 );
2560         }
2561
2562         /**
2563          * @param string $reason
2564          * @param bool $suppress
2565          * @param int $u1 Unused
2566          * @param bool $u2 Unused
2567          * @param string $error
2568          * @return bool
2569          */
2570         public function doDeleteArticle(
2571                 $reason, $suppress = false, $u1 = null, $u2 = null, &$error = ''
2572         ) {
2573                 return $this->mPage->doDeleteArticle( $reason, $suppress, $u1, $u2, $error );
2574         }
2575
2576         /**
2577          * @param string $fromP
2578          * @param string $summary
2579          * @param string $token
2580          * @param bool $bot
2581          * @param array $resultDetails
2582          * @param User|null $user
2583          * @return array
2584          */
2585         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails, User $user = null ) {
2586                 $user = is_null( $user ) ? $this->getContext()->getUser() : $user;
2587                 return $this->mPage->doRollback( $fromP, $summary, $token, $bot, $resultDetails, $user );
2588         }
2589
2590         /**
2591          * @param string $fromP
2592          * @param string $summary
2593          * @param bool $bot
2594          * @param array $resultDetails
2595          * @param User|null $guser
2596          * @return array
2597          */
2598         public function commitRollback( $fromP, $summary, $bot, &$resultDetails, User $guser = null ) {
2599                 $guser = is_null( $guser ) ? $this->getContext()->getUser() : $guser;
2600                 return $this->mPage->commitRollback( $fromP, $summary, $bot, $resultDetails, $guser );
2601         }
2602
2603         /**
2604          * @param bool $hasHistory
2605          * @return mixed
2606          */
2607         public function generateReason( &$hasHistory ) {
2608                 $title = $this->mPage->getTitle();
2609                 $handler = ContentHandler::getForTitle( $title );
2610                 return $handler->getAutoDeleteReason( $title, $hasHistory );
2611         }
2612
2613         /**
2614          * @return array
2615          *
2616          * @deprecated since 1.24, use WikiPage::selectFields() instead
2617          */
2618         public static function selectFields() {
2619                 wfDeprecated( __METHOD__, '1.24' );
2620                 return WikiPage::selectFields();
2621         }
2622
2623         /**
2624          * @param Title $title
2625          *
2626          * @deprecated since 1.24, use WikiPage::onArticleCreate() instead
2627          */
2628         public static function onArticleCreate( $title ) {
2629                 wfDeprecated( __METHOD__, '1.24' );
2630                 WikiPage::onArticleCreate( $title );
2631         }
2632
2633         /**
2634          * @param Title $title
2635          *
2636          * @deprecated since 1.24, use WikiPage::onArticleDelete() instead
2637          */
2638         public static function onArticleDelete( $title ) {
2639                 wfDeprecated( __METHOD__, '1.24' );
2640                 WikiPage::onArticleDelete( $title );
2641         }
2642
2643         /**
2644          * @param Title $title
2645          *
2646          * @deprecated since 1.24, use WikiPage::onArticleEdit() instead
2647          */
2648         public static function onArticleEdit( $title ) {
2649                 wfDeprecated( __METHOD__, '1.24' );
2650                 WikiPage::onArticleEdit( $title );
2651         }
2652
2653         // ******
2654 }