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