includes/Article.php

   1 <?php
   2 /**
   3  * File for articles
   4  * @file
   5  */
   6
   7 /**
   8  * Class representing a MediaWiki article and history.
   9  *
  10  * See design.txt for an overview.
  11  * Note: edit user interface and cache support functions have been
  12  * moved to separate EditPage and HTMLFileCache classes.
  13  *
  14  * @internal documentation reviewed 15 Mar 2010
  15  */
  16 class Article {
  17         /**@{{
  18          * @private
  19          */
  20         var $mComment = '';               // !<
  21         var $mContent;                    // !<
  22         var $mContentLoaded = false;      // !<
  23         var $mCounter = -1;               // !< Not loaded
  24         var $mCurID = -1;                 // !< Not loaded
  25         var $mDataLoaded = false;         // !<
  26         var $mForUpdate = false;          // !<
  27         var $mGoodAdjustment = 0;         // !<
  28         var $mIsRedirect = false;         // !<
  29         var $mLatest = false;             // !<
  30         var $mMinorEdit;                  // !<
  31         var $mOldId;                      // !<
  32         var $mPreparedEdit = false;       // !< Title object if set
  33         var $mRedirectedFrom = null;      // !< Title object if set
  34         var $mRedirectTarget = null;      // !< Title object if set
  35         var $mRedirectUrl = false;        // !<
  36         var $mRevIdFetched = 0;           // !<
  37         var $mRevision;                   // !< Revision object if set
  38         var $mTimestamp = '';             // !<
  39         var $mTitle;                      // !< Title object
  40         var $mTotalAdjustment = 0;        // !<
  41         var $mTouched = '19700101000000'; // !<
  42         var $mUser = -1;                  // !< Not loaded
  43         var $mUserText = '';              // !< username from Revision if set
  44         var $mParserOptions;              // !< ParserOptions object
  45         var $mParserOutput;               // !< ParserCache object if set
  46         /**@}}*/
  47
  48         /**
  49          * Constructor and clear the article
  50          * @param $title Reference to a Title object.
  51          * @param $oldId Integer revision ID, null to fetch from request, zero for current
  52          */
  53         public function __construct( Title $title, $oldId = null ) {
  54                 // FIXME: does the reference play any role here?
  55                 $this->mTitle =& $title;
  56                 $this->mOldId = $oldId;
  57         }
  58
  59         /**
  60          * Constructor from an page id
  61          * @param $id The article ID to load
  62          */
  63         public static function newFromID( $id ) {
  64                 $t = Title::newFromID( $id );
  65                 # FIXME: doesn't inherit right
  66                 return $t == null ? null : new self( $t );
  67                 # return $t == null ? null : new static( $t ); // PHP 5.3
  68         }
  69
  70         /**
  71          * Tell the page view functions that this view was redirected
  72          * from another page on the wiki.
  73          * @param $from Title object.
  74          */
  75         public function setRedirectedFrom( Title $from ) {
  76                 $this->mRedirectedFrom = $from;
  77         }
  78
  79         /**
  80          * If this page is a redirect, get its target
  81          *
  82          * The target will be fetched from the redirect table if possible.
  83          * If this page doesn't have an entry there, call insertRedirect()
  84          * @return mixed Title object, or null if this page is not a redirect
  85          */
  86         public function getRedirectTarget() {
  87                 if ( !$this->mTitle->isRedirect() ) {
  88                         return null;
  89                 }
  90
  91                 if ( $this->mRedirectTarget !== null ) {
  92                         return $this->mRedirectTarget;
  93                 }
  94
  95                 # Query the redirect table
  96                 $dbr = wfGetDB( DB_SLAVE );
  97                 $row = $dbr->selectRow( 'redirect',
  98                         array( 'rd_namespace', 'rd_title' ),
  99                         array( 'rd_from' => $this->getID() ),
 100                         __METHOD__
 101                 );
 102
 103                 if ( $row ) {
 104                         return $this->mRedirectTarget = Title::makeTitle( $row->rd_namespace, $row->rd_title );
 105                 }
 106
 107                 # This page doesn't have an entry in the redirect table
 108                 return $this->mRedirectTarget = $this->insertRedirect();
 109         }
 110
 111         /**
 112          * Insert an entry for this page into the redirect table.
 113          *
 114          * Don't call this function directly unless you know what you're doing.
 115          * @return Title object
 116          */
 117         public function insertRedirect() {
 118                 $retval = Title::newFromRedirect( $this->getContent() );
 119
 120                 if ( !$retval ) {
 121                         return null;
 122                 }
 123
 124                 $dbw = wfGetDB( DB_MASTER );
 125                 $dbw->replace( 'redirect', array( 'rd_from' ),
 126                         array(
 127                                 'rd_from' => $this->getID(),
 128                                 'rd_namespace' => $retval->getNamespace(),
 129                                 'rd_title' => $retval->getDBkey()
 130                         ),
 131                         __METHOD__
 132                 );
 133
 134                 return $retval;
 135         }
 136
 137         /**
 138          * Get the Title object this page redirects to
 139          *
 140          * @return mixed false, Title of in-wiki target, or string with URL
 141          */
 142         public function followRedirect() {
 143                 $text = $this->getContent();
 144                 return $this->followRedirectText( $text );
 145         }
 146
 147         /**
 148          * Get the Title object this text redirects to
 149          *
 150          * @param $text string article content containing redirect info
 151          * @return mixed false, Title of in-wiki target, or string with URL
 152          */
 153         public function followRedirectText( $text ) {
 154                 // recurse through to only get the final target
 155                 $rt = Title::newFromRedirectRecurse( $text );
 156
 157                 if ( $rt ) {
 158                         if ( $rt->getInterwiki() != '' ) {
 159                                 if ( $rt->isLocal() ) {
 160                                         // Offsite wikis need an HTTP redirect.
 161                                         //
 162                                         // This can be hard to reverse and may produce loops,
 163                                         // so they may be disabled in the site configuration.
 164                                         $source = $this->mTitle->getFullURL( 'redirect=no' );
 165                                         return $rt->getFullURL( 'rdfrom=' . urlencode( $source ) );
 166                                 }
 167                         } else {
 168                                 if ( $rt->getNamespace() == NS_SPECIAL ) {
 169                                         // Gotta handle redirects to special pages differently:
 170                                         // Fill the HTTP response "Location" header and ignore
 171                                         // the rest of the page we're on.
 172                                         //
 173                                         // This can be hard to reverse, so they may be disabled.
 174                                         if ( $rt->isSpecial( 'Userlogout' ) ) {
 175                                                 // rolleyes
 176                                         } else {
 177                                                 return $rt->getFullURL();
 178                                         }
 179                                 }
 180
 181                                 return $rt;
 182                         }
 183                 }
 184
 185                 // No or invalid redirect
 186                 return false;
 187         }
 188
 189         /**
 190          * Get the title object of the article
 191          * @return Title object of this page
 192          */
 193         public function getTitle() {
 194                 return $this->mTitle;
 195         }
 196
 197         /**
 198          * Clear the object
 199          * FIXME: shouldn't this be public?
 200          * @private
 201          */
 202         public function clear() {
 203                 $this->mDataLoaded    = false;
 204                 $this->mContentLoaded = false;
 205
 206                 $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
 207                 $this->mRedirectedFrom = null; # Title object if set
 208                 $this->mRedirectTarget = null; # Title object if set
 209                 $this->mUserText =
 210                 $this->mTimestamp = $this->mComment = '';
 211                 $this->mGoodAdjustment = $this->mTotalAdjustment = 0;
 212                 $this->mTouched = '19700101000000';
 213                 $this->mForUpdate = false;
 214                 $this->mIsRedirect = false;
 215                 $this->mRevIdFetched = 0;
 216                 $this->mRedirectUrl = false;
 217                 $this->mLatest = false;
 218                 $this->mPreparedEdit = false;
 219         }
 220
 221         /**
 222          * Note that getContent/loadContent do not follow redirects anymore.
 223          * If you need to fetch redirectable content easily, try
 224          * the shortcut in Article::followRedirect()
 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 Return the text of this revision
 230          */
 231         public function getContent() {
 232                 global $wgUser, $wgContLang, $wgOut, $wgMessageCache;
 233
 234                 wfProfileIn( __METHOD__ );
 235
 236                 if ( $this->getID() === 0 ) {
 237                         # If this is a MediaWiki:x message, then load the messages
 238                         # and return the message value for x.
 239                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 240                                 # If this is a system message, get the default text.
 241                                 list( $message, $lang ) = $wgMessageCache->figureMessage( $wgContLang->lcfirst( $this->mTitle->getText() ) );
 242                                 $wgMessageCache->loadAllMessages( $lang );
 243                                 $text = wfMsgGetKey( $message, false, $lang, false );
 244
 245                                 if ( wfEmptyMsg( $message, $text ) )
 246                                         $text = '';
 247                         } else {
 248                                 $text = wfMsgExt( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon', 'parsemag' );
 249                         }
 250                         wfProfileOut( __METHOD__ );
 251
 252                         return $text;
 253                 } else {
 254                         $this->loadContent();
 255                         wfProfileOut( __METHOD__ );
 256
 257                         return $this->mContent;
 258                 }
 259         }
 260
 261         /**
 262          * Get the text of the current revision. No side-effects...
 263          *
 264          * @return Return the text of the current revision
 265          */
 266         public function getRawText() {
 267                 // Check process cache for current revision
 268                 if ( $this->mContentLoaded && $this->mOldId == 0 ) {
 269                         return $this->mContent;
 270                 }
 271
 272                 $rev = Revision::newFromTitle( $this->mTitle );
 273                 $text = $rev ? $rev->getRawText() : false;
 274
 275                 return $text;
 276         }
 277
 278         /**
 279          * This function returns the text of a section, specified by a number ($section).
 280          * A section is text under a heading like == Heading == or \<h1\>Heading\</h1\>, or
 281          * the first section before any such heading (section 0).
 282          *
 283          * If a section contains subsections, these are also returned.
 284          *
 285          * @param $text String: text to look in
 286          * @param $section Integer: section number
 287          * @return string text of the requested section
 288          * @deprecated
 289          */
 290         public function getSection( $text, $section ) {
 291                 global $wgParser;
 292                 return $wgParser->getSection( $text, $section );
 293         }
 294
 295         /**
 296          * Get the text that needs to be saved in order to undo all revisions
 297          * between $undo and $undoafter. Revisions must belong to the same page,
 298          * must exist and must not be deleted
 299          * @param $undo Revision
 300          * @param $undoafter Revision Must be an earlier revision than $undo
 301          * @return mixed string on success, false on failure
 302          */
 303         public function getUndoText( Revision $undo, Revision $undoafter = null ) {
 304                 $undo_text = $undo->getText();
 305                 $undoafter_text = $undoafter->getText();
 306                 $cur_text = $this->getContent();
 307
 308                 if ( $cur_text == $undo_text ) {
 309                         # No use doing a merge if it's just a straight revert.
 310                         return $undoafter_text;
 311                 }
 312
 313                 $undone_text = '';
 314
 315                 if ( !wfMerge( $undo_text, $undoafter_text, $cur_text, $undone_text ) ) {
 316                         return false;
 317                 }
 318
 319                 return $undone_text;
 320         }
 321
 322         /**
 323          * @return int The oldid of the article that is to be shown, 0 for the
 324          *             current revision
 325          */
 326         public function getOldID() {
 327                 if ( is_null( $this->mOldId ) ) {
 328                         $this->mOldId = $this->getOldIDFromRequest();
 329                 }
 330
 331                 return $this->mOldId;
 332         }
 333
 334         /**
 335          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 336          *
 337          * @return int The old id for the request
 338          */
 339         public function getOldIDFromRequest() {
 340                 global $wgRequest;
 341
 342                 $this->mRedirectUrl = false;
 343
 344                 $oldid = $wgRequest->getVal( 'oldid' );
 345
 346                 if ( isset( $oldid ) ) {
 347                         $oldid = intval( $oldid );
 348                         if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 349                                 $nextid = $this->mTitle->getNextRevisionID( $oldid );
 350                                 if ( $nextid ) {
 351                                         $oldid = $nextid;
 352                                 } else {
 353                                         $this->mRedirectUrl = $this->mTitle->getFullURL( 'redirect=no' );
 354                                 }
 355                         } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 356                                 $previd = $this->mTitle->getPreviousRevisionID( $oldid );
 357                                 if ( $previd ) {
 358                                         $oldid = $previd;
 359                                 }
 360                         }
 361                 }
 362
 363                 if ( !$oldid ) {
 364                         $oldid = 0;
 365                 }
 366
 367                 return $oldid;
 368         }
 369
 370         /**
 371          * Load the revision (including text) into this object
 372          */
 373         function loadContent() {
 374                 if ( $this->mContentLoaded ) {
 375                         return;
 376                 }
 377
 378                 wfProfileIn( __METHOD__ );
 379
 380                 $oldid = $this->getOldID();
 381                 $this->mOldId = $oldid;
 382                 $this->fetchContent( $oldid );
 383
 384                 wfProfileOut( __METHOD__ );
 385         }
 386
 387         /**
 388          * Fetch a page record with the given conditions
 389          * @param $dbr Database object
 390          * @param $conditions Array
 391          * @return mixed Database result resource, or false on failure
 392          */
 393         protected function pageData( $dbr, $conditions ) {
 394                 $fields = array(
 395                                 'page_id',
 396                                 'page_namespace',
 397                                 'page_title',
 398                                 'page_restrictions',
 399                                 'page_counter',
 400                                 'page_is_redirect',
 401                                 'page_is_new',
 402                                 'page_random',
 403                                 'page_touched',
 404                                 'page_latest',
 405                                 'page_len',
 406                 );
 407
 408                 wfRunHooks( 'ArticlePageDataBefore', array( &$this, &$fields ) );
 409
 410                 $row = $dbr->selectRow( 'page', $fields, $conditions, __METHOD__ );
 411
 412                 wfRunHooks( 'ArticlePageDataAfter', array( &$this, &$row ) );
 413
 414                 return $row;
 415         }
 416
 417         /**
 418          * Fetch a page record matching the Title object's namespace and title
 419          * using a sanitized title string
 420          *
 421          * @param $dbr Database object
 422          * @param $title Title object
 423          * @return mixed Database result resource, or false on failure
 424          */
 425         public function pageDataFromTitle( $dbr, $title ) {
 426                 return $this->pageData( $dbr, array(
 427                         'page_namespace' => $title->getNamespace(),
 428                         'page_title'     => $title->getDBkey() ) );
 429         }
 430
 431         /**
 432          * Fetch a page record matching the requested ID
 433          *
 434          * @param $dbr Database
 435          * @param $id Integer
 436          */
 437         protected function pageDataFromId( $dbr, $id ) {
 438                 return $this->pageData( $dbr, array( 'page_id' => $id ) );
 439         }
 440
 441         /**
 442          * Set the general counter, title etc data loaded from
 443          * some source.
 444          *
 445          * @param $data Database row object or "fromdb"
 446          */
 447         public function loadPageData( $data = 'fromdb' ) {
 448                 if ( $data === 'fromdb' ) {
 449                         $dbr = wfGetDB( DB_MASTER );
 450                         $data = $this->pageDataFromId( $dbr, $this->getId() );
 451                 }
 452
 453                 $lc = LinkCache::singleton();
 454
 455                 if ( $data ) {
 456                         $lc->addGoodLinkObj( $data->page_id, $this->mTitle, $data->page_len, $data->page_is_redirect, $data->page_latest );
 457
 458                         $this->mTitle->mArticleID = intval( $data->page_id );
 459
 460                         # Old-fashioned restrictions
 461                         $this->mTitle->loadRestrictions( $data->page_restrictions );
 462
 463                         $this->mCounter     = intval( $data->page_counter );
 464                         $this->mTouched     = wfTimestamp( TS_MW, $data->page_touched );
 465                         $this->mIsRedirect  = intval( $data->page_is_redirect );
 466                         $this->mLatest      = intval( $data->page_latest );
 467                 } else {
 468                         $lc->addBadLinkObj( $this->mTitle );
 469                         $this->mTitle->mArticleID = 0;
 470                 }
 471
 472                 $this->mDataLoaded = true;
 473         }
 474
 475         /**
 476          * Get text of an article from database
 477          * Does *NOT* follow redirects.
 478          *
 479          * @param $oldid Int: 0 for whatever the latest revision is
 480          * @return mixed string containing article contents, or false if null
 481          */
 482         function fetchContent( $oldid = 0 ) {
 483                 if ( $this->mContentLoaded ) {
 484                         return $this->mContent;
 485                 }
 486
 487                 $dbr = wfGetDB( DB_MASTER );
 488
 489                 # Pre-fill content with error message so that if something
 490                 # fails we'll have something telling us what we intended.
 491                 $t = $this->mTitle->getPrefixedText();
 492                 $d = $oldid ? wfMsgExt( 'missingarticle-rev', array( 'escape' ), $oldid ) : '';
 493                 $this->mContent = wfMsgNoTrans( 'missing-article', $t, $d ) ;
 494
 495                 if ( $oldid ) {
 496                         $revision = Revision::newFromId( $oldid );
 497                         if ( $revision === null ) {
 498                                 wfDebug( __METHOD__ . " failed to retrieve specified revision, id $oldid\n" );
 499                                 return false;
 500                         }
 501
 502                         $data = $this->pageDataFromId( $dbr, $revision->getPage() );
 503
 504                         if ( !$data ) {
 505                                 wfDebug( __METHOD__ . " failed to get page data linked to revision id $oldid\n" );
 506                                 return false;
 507                         }
 508
 509                         $this->mTitle = Title::makeTitle( $data->page_namespace, $data->page_title );
 510                         $this->loadPageData( $data );
 511                 } else {
 512                         if ( !$this->mDataLoaded ) {
 513                                 $data = $this->pageDataFromTitle( $dbr, $this->mTitle );
 514
 515                                 if ( !$data ) {
 516                                         wfDebug( __METHOD__ . " failed to find page data for title " . $this->mTitle->getPrefixedText() . "\n" );
 517                                         return false;
 518                                 }
 519
 520                                 $this->loadPageData( $data );
 521                         }
 522                         $revision = Revision::newFromId( $this->mLatest );
 523                         if (  $revision === null ) {
 524                                 wfDebug( __METHOD__ . " failed to retrieve current page, rev_id {$this->mLatest}\n" );
 525                                 return false;
 526                         }
 527                 }
 528
 529                 // FIXME: Horrible, horrible! This content-loading interface just plain sucks.
 530                 // We should instead work with the Revision object when we need it...
 531                 $this->mContent   = $revision->getText( Revision::FOR_THIS_USER ); // Loads if user is allowed
 532
 533                 $this->mUser      = $revision->getUser();
 534                 $this->mUserText  = $revision->getUserText();
 535                 $this->mComment   = $revision->getComment();
 536                 $this->mTimestamp = wfTimestamp( TS_MW, $revision->getTimestamp() );
 537
 538                 $this->mRevIdFetched = $revision->getId();
 539                 $this->mContentLoaded = true;
 540                 $this->mRevision =& $revision;
 541
 542                 wfRunHooks( 'ArticleAfterFetchContent', array( &$this, &$this->mContent ) ) ;
 543
 544                 return $this->mContent;
 545         }
 546
 547         /**
 548          * Read/write accessor to select FOR UPDATE
 549          *
 550          * @param $x Mixed: FIXME
 551          * @return mixed value of $x, or value stored in Article::mForUpdate
 552          */
 553         public function forUpdate( $x = null ) {
 554                 return wfSetVar( $this->mForUpdate, $x );
 555         }
 556
 557         /**
 558          * Get options for all SELECT statements
 559          *
 560          * @param $options Array: an optional options array which'll be appended to
 561          *                       the default
 562          * @return Array: options
 563          */
 564         protected function getSelectOptions( $options = '' ) {
 565                 if ( $this->mForUpdate ) {
 566                         if ( is_array( $options ) ) {
 567                                 $options[] = 'FOR UPDATE';
 568                         } else {
 569                                 $options = 'FOR UPDATE';
 570                         }
 571                 }
 572
 573                 return $options;
 574         }
 575
 576         /**
 577          * @return int Page ID
 578          */
 579         public function getID() {
 580                 return $this->mTitle->getArticleID();
 581         }
 582
 583         /**
 584          * @return bool Whether or not the page exists in the database
 585          */
 586         public function exists() {
 587                 return $this->getId() > 0;
 588         }
 589
 590         /**
 591          * Check if this page is something we're going to be showing
 592          * some sort of sensible content for. If we return false, page
 593          * views (plain action=view) will return an HTTP 404 response,
 594          * so spiders and robots can know they're following a bad link.
 595          *
 596          * @return bool
 597          */
 598         public function hasViewableContent() {
 599                 return $this->exists() || $this->mTitle->isAlwaysKnown();
 600         }
 601
 602         /**
 603          * @return int The view count for the page
 604          */
 605         public function getCount() {
 606                 if ( -1 == $this->mCounter ) {
 607                         $id = $this->getID();
 608
 609                         if ( $id == 0 ) {
 610                                 $this->mCounter = 0;
 611                         } else {
 612                                 $dbr = wfGetDB( DB_SLAVE );
 613                                 $this->mCounter = $dbr->selectField( 'page',
 614                                         'page_counter',
 615                                         array( 'page_id' => $id ),
 616                                         __METHOD__,
 617                                         $this->getSelectOptions()
 618                                 );
 619                         }
 620                 }
 621
 622                 return $this->mCounter;
 623         }
 624
 625         /**
 626          * Determine whether a page would be suitable for being counted as an
 627          * article in the site_stats table based on the title & its content
 628          *
 629          * @param $text String: text to analyze
 630          * @return bool
 631          */
 632         public function isCountable( $text ) {
 633                 global $wgUseCommaCount;
 634
 635                 $token = $wgUseCommaCount ? ',' : '[[';
 636
 637                 return $this->mTitle->isContentPage() && !$this->isRedirect( $text ) && in_string( $token, $text );
 638         }
 639
 640         /**
 641          * Tests if the article text represents a redirect
 642          *
 643          * @param $text mixed string containing article contents, or boolean
 644          * @return bool
 645          */
 646         public function isRedirect( $text = false ) {
 647                 if ( $text === false ) {
 648                         if ( $this->mDataLoaded ) {
 649                                 return $this->mIsRedirect;
 650                         }
 651
 652                         // Apparently loadPageData was never called
 653                         $this->loadContent();
 654                         $titleObj = Title::newFromRedirectRecurse( $this->fetchContent() );
 655                 } else {
 656                         $titleObj = Title::newFromRedirect( $text );
 657                 }
 658
 659                 return $titleObj !== null;
 660         }
 661
 662         /**
 663          * Returns true if the currently-referenced revision is the current edit
 664          * to this page (and it exists).
 665          * @return bool
 666          */
 667         public function isCurrent() {
 668                 # If no oldid, this is the current version.
 669                 if ( $this->getOldID() == 0 ) {
 670                         return true;
 671                 }
 672
 673                 return $this->exists() && isset( $this->mRevision ) && $this->mRevision->isCurrent();
 674         }
 675
 676         /**
 677          * Loads everything except the text
 678          * This isn't necessary for all uses, so it's only done if needed.
 679          */
 680         protected function loadLastEdit() {
 681                 if ( -1 != $this->mUser ) {
 682                         return;
 683                 }
 684
 685                 # New or non-existent articles have no user information
 686                 $id = $this->getID();
 687                 if ( 0 == $id ) {
 688                         return;
 689                 }
 690
 691                 $this->mLastRevision = Revision::loadFromPageId( wfGetDB( DB_MASTER ), $id );
 692                 if ( !is_null( $this->mLastRevision ) ) {
 693                         $this->mUser      = $this->mLastRevision->getUser();
 694                         $this->mUserText  = $this->mLastRevision->getUserText();
 695                         $this->mTimestamp = $this->mLastRevision->getTimestamp();
 696                         $this->mComment   = $this->mLastRevision->getComment();
 697                         $this->mMinorEdit = $this->mLastRevision->isMinor();
 698                         $this->mRevIdFetched = $this->mLastRevision->getId();
 699                 }
 700         }
 701
 702         /**
 703          * @return string GMT timestamp of last article revision
 704          **/
 705
 706         public function getTimestamp() {
 707                 // Check if the field has been filled by ParserCache::get()
 708                 if ( !$this->mTimestamp ) {
 709                         $this->loadLastEdit();
 710                 }
 711
 712                 return wfTimestamp( TS_MW, $this->mTimestamp );
 713         }
 714
 715         /**
 716          * @return int user ID for the user that made the last article revision
 717          */
 718         public function getUser() {
 719                 $this->loadLastEdit();
 720                 return $this->mUser;
 721         }
 722
 723         /**
 724          * @return string username of the user that made the last article revision
 725          */
 726         public function getUserText() {
 727                 $this->loadLastEdit();
 728                 return $this->mUserText;
 729         }
 730
 731         /**
 732          * @return string Comment stored for the last article revision
 733          */
 734         public function getComment() {
 735                 $this->loadLastEdit();
 736                 return $this->mComment;
 737         }
 738
 739         /**
 740          * Returns true if last revision was marked as "minor edit"
 741          *
 742          * @return boolean Minor edit indicator for the last article revision.
 743          */
 744         public function getMinorEdit() {
 745                 $this->loadLastEdit();
 746                 return $this->mMinorEdit;
 747         }
 748
 749         /**
 750          * Use this to fetch the rev ID used on page views
 751          *
 752          * @return int revision ID of last article revision
 753          */
 754         public function getRevIdFetched() {
 755                 $this->loadLastEdit();
 756                 return $this->mRevIdFetched;
 757         }
 758
 759         /**
 760          * FIXME: this does what?
 761          * @param $limit Integer: default 0.
 762          * @param $offset Integer: default 0.
 763          * @return UserArrayFromResult object with User objects of article contributors for requested range
 764          */
 765         public function getContributors( $limit = 0, $offset = 0 ) {
 766                 # FIXME: this is expensive; cache this info somewhere.
 767
 768                 $dbr = wfGetDB( DB_SLAVE );
 769                 $revTable = $dbr->tableName( 'revision' );
 770                 $userTable = $dbr->tableName( 'user' );
 771
 772                 $pageId = $this->getId();
 773
 774                 $user = $this->getUser();
 775
 776                 if ( $user ) {
 777                         $excludeCond = "AND rev_user != $user";
 778                 } else {
 779                         $userText = $dbr->addQuotes( $this->getUserText() );
 780                         $excludeCond = "AND rev_user_text != $userText";
 781                 }
 782
 783                 $deletedBit = $dbr->bitAnd( 'rev_deleted', Revision::DELETED_USER ); // username hidden?
 784
 785                 $sql = "SELECT {$userTable}.*, rev_user_text as user_name, MAX(rev_timestamp) as timestamp
 786                         FROM $revTable LEFT JOIN $userTable ON rev_user = user_id
 787                         WHERE rev_page = $pageId
 788                         $excludeCond
 789                         AND $deletedBit = 0
 790                         GROUP BY rev_user, rev_user_text
 791                         ORDER BY timestamp DESC";
 792
 793                 if ( $limit > 0 ) {
 794                         $sql = $dbr->limitResult( $sql, $limit, $offset );
 795                 }
 796
 797                 $sql .= ' ' . $this->getSelectOptions();
 798                 $res = $dbr->query( $sql, __METHOD__ );
 799
 800                 return new UserArrayFromResult( $res );
 801         }
 802
 803         /**
 804          * This is the default action of the index.php entry point: just view the
 805          * page of the given title.
 806          */
 807         public function view() {
 808                 global $wgUser, $wgOut, $wgRequest, $wgContLang;
 809                 global $wgEnableParserCache, $wgStylePath, $wgParser;
 810                 global $wgUseTrackbacks, $wgUseFileCache;
 811
 812                 wfProfileIn( __METHOD__ );
 813
 814                 # Get variables from query string
 815                 $oldid = $this->getOldID();
 816                 $parserCache = ParserCache::singleton();
 817
 818                 $parserOptions = clone $this->getParserOptions();
 819                 # Render printable version, use printable version cache
 820                 if ( $wgOut->isPrintable() ) {
 821                         $parserOptions->setIsPrintable( true );
 822                 }
 823
 824                 # Try client and file cache
 825                 if ( $oldid === 0 && $this->checkTouched() ) {
 826                         global $wgUseETag;
 827
 828                         if ( $wgUseETag ) {
 829                                 $wgOut->setETag( $parserCache->getETag( $this, $parserOptions ) );
 830                         }
 831
 832                         # Is is client cached?
 833                         if ( $wgOut->checkLastModified( $this->getTouched() ) ) {
 834                                 wfDebug( __METHOD__ . ": done 304\n" );
 835                                 wfProfileOut( __METHOD__ );
 836
 837                                 return;
 838                         # Try file cache
 839                         } else if ( $wgUseFileCache && $this->tryFileCache() ) {
 840                                 wfDebug( __METHOD__ . ": done file cache\n" );
 841                                 # tell wgOut that output is taken care of
 842                                 $wgOut->disable();
 843                                 $this->viewUpdates();
 844                                 wfProfileOut( __METHOD__ );
 845
 846                                 return;
 847                         }
 848                 }
 849
 850                 # getOldID may want us to redirect somewhere else
 851                 if ( $this->mRedirectUrl ) {
 852                         $wgOut->redirect( $this->mRedirectUrl );
 853                         wfDebug( __METHOD__ . ": redirecting due to oldid\n" );
 854                         wfProfileOut( __METHOD__ );
 855
 856                         return;
 857                 }
 858
 859                 $wgOut->setArticleFlag( true );
 860                 # Set page title (may be overridden by DISPLAYTITLE)
 861                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 862
 863                 # If we got diff in the query, we want to see a diff page instead of the article.
 864                 if ( $wgRequest->getCheck( 'diff' ) ) {
 865                         wfDebug( __METHOD__ . ": showing diff page\n" );
 866                         $this->showDiffPage();
 867                         wfProfileOut( __METHOD__ );
 868
 869                         return;
 870                 }
 871
 872                 # Should the parser cache be used?
 873                 $useParserCache = $this->useParserCache( $oldid );
 874                 wfDebug( 'Article::view using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
 875                 if ( $wgUser->getOption( 'stubthreshold' ) ) {
 876                         wfIncrStats( 'pcache_miss_stub' );
 877                 }
 878
 879                 $wasRedirected = $this->showRedirectedFromHeader();
 880                 $this->showNamespaceHeader();
 881
 882                 # Iterate through the possible ways of constructing the output text.
 883                 # Keep going until $outputDone is set, or we run out of things to do.
 884                 $pass = 0;
 885                 $outputDone = false;
 886                 $this->mParserOutput = false;
 887
 888                 while ( !$outputDone && ++$pass ) {
 889                         switch( $pass ) {
 890                                 case 1:
 891                                         wfRunHooks( 'ArticleViewHeader', array( &$this, &$outputDone, &$useParserCache ) );
 892                                         break;
 893                                 case 2:
 894                                         # Try the parser cache
 895                                         if ( $useParserCache ) {
 896                                                 $this->mParserOutput = $parserCache->get( $this, $parserOptions );
 897
 898                                                 if ( $this->mParserOutput !== false ) {
 899                                                         wfDebug( __METHOD__ . ": showing parser cache contents\n" );
 900                                                         $wgOut->addParserOutput( $this->mParserOutput );
 901                                                         # Ensure that UI elements requiring revision ID have
 902                                                         # the correct version information.
 903                                                         $wgOut->setRevisionId( $this->mLatest );
 904                                                         $outputDone = true;
 905                                                 }
 906                                         }
 907                                         break;
 908                                 case 3:
 909                                         $text = $this->getContent();
 910                                         if ( $text === false || $this->getID() == 0 ) {
 911                                                 wfDebug( __METHOD__ . ": showing missing article\n" );
 912                                                 $this->showMissingArticle();
 913                                                 wfProfileOut( __METHOD__ );
 914                                                 return;
 915                                         }
 916
 917                                         # Another whitelist check in case oldid is altering the title
 918                                         if ( !$this->mTitle->userCanRead() ) {
 919                                                 wfDebug( __METHOD__ . ": denied on secondary read check\n" );
 920                                                 $wgOut->loginToUse();
 921                                                 $wgOut->output();
 922                                                 $wgOut->disable();
 923                                                 wfProfileOut( __METHOD__ );
 924                                                 return;
 925                                         }
 926
 927                                         # Are we looking at an old revision
 928                                         if ( $oldid && !is_null( $this->mRevision ) ) {
 929                                                 $this->setOldSubtitle( $oldid );
 930
 931                                                 if ( !$this->showDeletedRevisionHeader() ) {
 932                                                         wfDebug( __METHOD__ . ": cannot view deleted revision\n" );
 933                                                         wfProfileOut( __METHOD__ );
 934                                                         return;
 935                                                 }
 936
 937                                                 # If this "old" version is the current, then try the parser cache...
 938                                                 if ( $oldid === $this->getLatest() && $this->useParserCache( false ) ) {
 939                                                         $this->mParserOutput = $parserCache->get( $this, $parserOptions );
 940                                                         if ( $this->mParserOutput ) {
 941                                                                 wfDebug( __METHOD__ . ": showing parser cache for current rev permalink\n" );
 942                                                                 $wgOut->addParserOutput( $this->mParserOutput );
 943                                                                 $wgOut->setRevisionId( $this->mLatest );
 944                                                                 $this->showViewFooter();
 945                                                                 $this->viewUpdates();
 946                                                                 wfProfileOut( __METHOD__ );
 947                                                                 return;
 948                                                         }
 949                                                 }
 950                                         }
 951
 952                                         # Ensure that UI elements requiring revision ID have
 953                                         # the correct version information.
 954                                         $wgOut->setRevisionId( $this->getRevIdFetched() );
 955
 956                                         # Pages containing custom CSS or JavaScript get special treatment
 957                                         if ( $this->mTitle->isCssOrJsPage() || $this->mTitle->isCssJsSubpage() ) {
 958                                                 wfDebug( __METHOD__ . ": showing CSS/JS source\n" );
 959                                                 $this->showCssOrJsPage();
 960                                                 $outputDone = true;
 961                                         } else if ( $rt = Title::newFromRedirectArray( $text ) ) {
 962                                                 wfDebug( __METHOD__ . ": showing redirect=no page\n" );
 963                                                 # Viewing a redirect page (e.g. with parameter redirect=no)
 964                                                 # Don't append the subtitle if this was an old revision
 965                                                 $wgOut->addHTML( $this->viewRedirect( $rt, !$wasRedirected && $this->isCurrent() ) );
 966                                                 # Parse just to get categories, displaytitle, etc.
 967                                                 $this->mParserOutput = $wgParser->parse( $text, $this->mTitle, $parserOptions );
 968                                                 $wgOut->addParserOutputNoText( $this->mParserOutput );
 969                                                 $outputDone = true;
 970                                         }
 971                                         break;
 972                                 case 4:
 973                                         # Run the parse, protected by a pool counter
 974                                         wfDebug( __METHOD__ . ": doing uncached parse\n" );
 975                                         $key = $parserCache->getKey( $this, $parserOptions );
 976                                         $poolCounter = PoolCounter::factory( 'Article::view', $key );
 977                                         $dirtyCallback = $useParserCache ? array( $this, 'tryDirtyCache' ) : false;
 978                                         $status = $poolCounter->executeProtected( array( $this, 'doViewParse' ), $dirtyCallback );
 979
 980                                         if ( !$status->isOK() ) {
 981                                                 # Connection or timeout error
 982                                                 $this->showPoolError( $status );
 983                                                 wfProfileOut( __METHOD__ );
 984                                                 return;
 985                                         } else {
 986                                                 $outputDone = true;
 987                                         }
 988                                         break;
 989                                 # Should be unreachable, but just in case...
 990                                 default:
 991                                         break 2;
 992                         }
 993                 }
 994
 995                 # Adjust the title if it was set by displaytitle, -{T|}- or language conversion
 996                 if ( $this->mParserOutput ) {
 997                         $titleText = $this->mParserOutput->getTitleText();
 998
 999                         if ( strval( $titleText ) !== '' ) {
1000                                 $wgOut->setPageTitle( $titleText );
1001                         }
1002                 }
1003
1004                 # For the main page, overwrite the <title> element with the con-
1005                 # tents of 'pagetitle-view-mainpage' instead of the default (if
1006                 # that's not empty).
1007                 # This message always exists because it is in the i18n files
1008                 if ( $this->mTitle->equals( Title::newMainPage() )
1009                         && ( $m = wfMsgForContent( 'pagetitle-view-mainpage' ) ) !== '' )
1010                 {
1011                         $wgOut->setHTMLTitle( $m );
1012                 }
1013
1014                 # Now that we've filled $this->mParserOutput, we know whether
1015                 # there are any __NOINDEX__ tags on the page
1016                 $policy = $this->getRobotPolicy( 'view' );
1017                 $wgOut->setIndexPolicy( $policy['index'] );
1018                 $wgOut->setFollowPolicy( $policy['follow'] );
1019
1020                 $this->showViewFooter();
1021                 $this->viewUpdates();
1022                 wfProfileOut( __METHOD__ );
1023         }
1024
1025         /**
1026          * Show a diff page according to current request variables. For use within
1027          * Article::view() only, other callers should use the DifferenceEngine class.
1028          */
1029         public function showDiffPage() {
1030                 global $wgOut, $wgRequest, $wgUser;
1031
1032                 $diff = $wgRequest->getVal( 'diff' );
1033                 $rcid = $wgRequest->getVal( 'rcid' );
1034                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
1035                 $purge = $wgRequest->getVal( 'action' ) == 'purge';
1036                 $unhide = $wgRequest->getInt( 'unhide' ) == 1;
1037                 $oldid = $this->getOldID();
1038
1039                 $de = new DifferenceEngine( $this->mTitle, $oldid, $diff, $rcid, $purge, $unhide );
1040                 // DifferenceEngine directly fetched the revision:
1041                 $this->mRevIdFetched = $de->mNewid;
1042                 $de->showDiffPage( $diffOnly );
1043
1044                 // Needed to get the page's current revision
1045                 $this->loadPageData();
1046                 if ( $diff == 0 || $diff == $this->mLatest ) {
1047                         # Run view updates for current revision only
1048                         $this->viewUpdates();
1049                 }
1050         }
1051
1052         /**
1053          * Show a page view for a page formatted as CSS or JavaScript. To be called by
1054          * Article::view() only.
1055          *
1056          * This is hooked by SyntaxHighlight_GeSHi to do syntax highlighting of these
1057          * page views.
1058          */
1059         public function showCssOrJsPage() {
1060                 global $wgOut;
1061
1062                 $wgOut->wrapWikiMsg( "<div id='mw-clearyourcache'>\n$1\n</div>", 'clearyourcache' );
1063
1064                 // Give hooks a chance to customise the output
1065                 if ( wfRunHooks( 'ShowRawCssJs', array( $this->mContent, $this->mTitle, $wgOut ) ) ) {
1066                         // Wrap the whole lot in a <pre> and don't parse
1067                         $m = array();
1068                         preg_match( '!\.(css|js)$!u', $this->mTitle->getText(), $m );
1069                         $wgOut->addHTML( "<pre class=\"mw-code mw-{$m[1]}\" dir=\"ltr\">\n" );
1070                         $wgOut->addHTML( htmlspecialchars( $this->mContent ) );
1071                         $wgOut->addHTML( "\n</pre>\n" );
1072                 }
1073         }
1074
1075         /**
1076          * Get the robot policy to be used for the current action=view request.
1077          * @return String the policy that should be set
1078          * @deprecated use getRobotPolicy() instead, which returns an associative
1079          *    array
1080          */
1081         public function getRobotPolicyForView() {
1082                 wfDeprecated( __METHOD__ );
1083                 $policy = $this->getRobotPolicy( 'view' );
1084
1085                 return $policy['index'] . ',' . $policy['follow'];
1086         }
1087
1088         /**
1089          * Get the robot policy to be used for the current view
1090          * @param $action String the action= GET parameter
1091          * @return Array the policy that should be set
1092          * TODO: actions other than 'view'
1093          */
1094         public function getRobotPolicy( $action ) {
1095                 global $wgOut, $wgArticleRobotPolicies, $wgNamespaceRobotPolicies;
1096                 global $wgDefaultRobotPolicy, $wgRequest;
1097
1098                 $ns = $this->mTitle->getNamespace();
1099
1100                 if ( $ns == NS_USER || $ns == NS_USER_TALK ) {
1101                         # Don't index user and user talk pages for blocked users (bug 11443)
1102                         if ( !$this->mTitle->isSubpage() ) {
1103                                 $block = new Block();
1104                                 if ( $block->load( $this->mTitle->getText() ) ) {
1105                                         return array(
1106                                                 'index'  => 'noindex',
1107                                                 'follow' => 'nofollow'
1108                                         );
1109                                 }
1110                         }
1111                 }
1112
1113                 if ( $this->getID() === 0 || $this->getOldID() ) {
1114                         # Non-articles (special pages etc), and old revisions
1115                         return array(
1116                                 'index'  => 'noindex',
1117                                 'follow' => 'nofollow'
1118                         );
1119                 } elseif ( $wgOut->isPrintable() ) {
1120                         # Discourage indexing of printable versions, but encourage following
1121                         return array(
1122                                 'index'  => 'noindex',
1123                                 'follow' => 'follow'
1124                         );
1125                 } elseif ( $wgRequest->getInt( 'curid' ) ) {
1126                         # For ?curid=x urls, disallow indexing
1127                         return array(
1128                                 'index'  => 'noindex',
1129                                 'follow' => 'follow'
1130                         );
1131                 }
1132
1133                 # Otherwise, construct the policy based on the various config variables.
1134                 $policy = self::formatRobotPolicy( $wgDefaultRobotPolicy );
1135
1136                 if ( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
1137                         # Honour customised robot policies for this namespace
1138                         $policy = array_merge(
1139                                 $policy,
1140                                 self::formatRobotPolicy( $wgNamespaceRobotPolicies[$ns] )
1141                         );
1142                 }
1143                 if ( $this->mTitle->canUseNoindex() && is_object( $this->mParserOutput ) && $this->mParserOutput->getIndexPolicy() ) {
1144                         # __INDEX__ and __NOINDEX__ magic words, if allowed. Incorporates
1145                         # a final sanity check that we have really got the parser output.
1146                         $policy = array_merge(
1147                                 $policy,
1148                                 array( 'index' => $this->mParserOutput->getIndexPolicy() )
1149                         );
1150                 }
1151
1152                 if ( isset( $wgArticleRobotPolicies[$this->mTitle->getPrefixedText()] ) ) {
1153                         # (bug 14900) site config can override user-defined __INDEX__ or __NOINDEX__
1154                         $policy = array_merge(
1155                                 $policy,
1156                                 self::formatRobotPolicy( $wgArticleRobotPolicies[$this->mTitle->getPrefixedText()] )
1157                         );
1158                 }
1159
1160                 return $policy;
1161         }
1162
1163         /**
1164          * Converts a String robot policy into an associative array, to allow
1165          * merging of several policies using array_merge().
1166          * @param $policy Mixed, returns empty array on null/false/'', transparent
1167          *            to already-converted arrays, converts String.
1168          * @return associative Array: 'index' => <indexpolicy>, 'follow' => <followpolicy>
1169          */
1170         public static function formatRobotPolicy( $policy ) {
1171                 if ( is_array( $policy ) ) {
1172                         return $policy;
1173                 } elseif ( !$policy ) {
1174                         return array();
1175                 }
1176
1177                 $policy = explode( ',', $policy );
1178                 $policy = array_map( 'trim', $policy );
1179
1180                 $arr = array();
1181                 foreach ( $policy as $var ) {
1182                         if ( in_array( $var, array( 'index', 'noindex' ) ) ) {
1183                                 $arr['index'] = $var;
1184                         } elseif ( in_array( $var, array( 'follow', 'nofollow' ) ) ) {
1185                                 $arr['follow'] = $var;
1186                         }
1187                 }
1188
1189                 return $arr;
1190         }
1191
1192         /**
1193          * If this request is a redirect view, send "redirected from" subtitle to
1194          * $wgOut. Returns true if the header was needed, false if this is not a
1195          * redirect view. Handles both local and remote redirects.
1196          *
1197          * @return boolean
1198          */
1199         public function showRedirectedFromHeader() {
1200                 global $wgOut, $wgUser, $wgRequest, $wgRedirectSources;
1201
1202                 $rdfrom = $wgRequest->getVal( 'rdfrom' );
1203                 $sk = $wgUser->getSkin();
1204
1205                 if ( isset( $this->mRedirectedFrom ) ) {
1206                         // This is an internally redirected page view.
1207                         // We'll need a backlink to the source page for navigation.
1208                         if ( wfRunHooks( 'ArticleViewRedirect', array( &$this ) ) ) {
1209                                 $redir = $sk->link(
1210                                         $this->mRedirectedFrom,
1211                                         null,
1212                                         array(),
1213                                         array( 'redirect' => 'no' ),
1214                                         array( 'known', 'noclasses' )
1215                                 );
1216
1217                                 $s = wfMsgExt( 'redirectedfrom', array( 'parseinline', 'replaceafter' ), $redir );
1218                                 $wgOut->setSubtitle( $s );
1219
1220                                 // Set the fragment if one was specified in the redirect
1221                                 if ( strval( $this->mTitle->getFragment() ) != '' ) {
1222                                         $fragment = Xml::escapeJsString( $this->mTitle->getFragmentForURL() );
1223                                         $wgOut->addInlineScript( "redirectToFragment(\"$fragment\");" );
1224                                 }
1225
1226                                 // Add a <link rel="canonical"> tag
1227                                 $wgOut->addLink( array( 'rel' => 'canonical',
1228                                         'href' => $this->mTitle->getLocalURL() )
1229                                 );
1230
1231                                 return true;
1232                         }
1233                 } elseif ( $rdfrom ) {
1234                         // This is an externally redirected view, from some other wiki.
1235                         // If it was reported from a trusted site, supply a backlink.
1236                         if ( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
1237                                 $redir = $sk->makeExternalLink( $rdfrom, $rdfrom );
1238                                 $s = wfMsgExt( 'redirectedfrom', array( 'parseinline', 'replaceafter' ), $redir );
1239                                 $wgOut->setSubtitle( $s );
1240
1241                                 return true;
1242                         }
1243                 }
1244
1245                 return false;
1246         }
1247
1248         /**
1249          * Show a header specific to the namespace currently being viewed, like
1250          * [[MediaWiki:Talkpagetext]]. For Article::view().
1251          */
1252         public function showNamespaceHeader() {
1253                 global $wgOut;
1254
1255                 if ( $this->mTitle->isTalkPage() ) {
1256                         $msg = wfMsgNoTrans( 'talkpageheader' );
1257                         if ( $msg !== '-' && !wfEmptyMsg( 'talkpageheader', $msg ) ) {
1258                                 $wgOut->wrapWikiMsg( "<div class=\"mw-talkpageheader\">\n$1\n</div>", array( 'talkpageheader' ) );
1259                         }
1260                 }
1261         }
1262
1263         /**
1264          * Show the footer section of an ordinary page view
1265          */
1266         public function showViewFooter() {
1267                 global $wgOut, $wgUseTrackbacks, $wgRequest;
1268
1269                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
1270                 if ( $this->mTitle->getNamespace() == NS_USER_TALK && IP::isValid( $this->mTitle->getText() ) ) {
1271                         $wgOut->addWikiMsg( 'anontalkpagetext' );
1272                 }
1273
1274                 # If we have been passed an &rcid= parameter, we want to give the user a
1275                 # chance to mark this new article as patrolled.
1276                 $this->showPatrolFooter();
1277
1278                 # Trackbacks
1279                 if ( $wgUseTrackbacks ) {
1280                         $this->addTrackbacks();
1281                 }
1282         }
1283
1284         /**
1285          * If patrol is possible, output a patrol UI box. This is called from the
1286          * footer section of ordinary page views. If patrol is not possible or not
1287          * desired, does nothing.
1288          */
1289         public function showPatrolFooter() {
1290                 global $wgOut, $wgRequest, $wgUser;
1291
1292                 $rcid = $wgRequest->getVal( 'rcid' );
1293
1294                 if ( !$rcid || !$this->mTitle->quickUserCan( 'patrol' ) ) {
1295                         return;
1296                 }
1297
1298                 $sk = $wgUser->getSkin();
1299
1300                 $wgOut->addHTML(
1301                         "<div class='patrollink'>" .
1302                                 wfMsgHtml(
1303                                         'markaspatrolledlink',
1304                                         $sk->link(
1305                                                 $this->mTitle,
1306                                                 wfMsgHtml( 'markaspatrolledtext' ),
1307                                                 array(),
1308                                                 array(
1309                                                         'action' => 'markpatrolled',
1310                                                         'rcid' => $rcid
1311                                                 ),
1312                                                 array( 'known', 'noclasses' )
1313                                         )
1314                                 ) .
1315                         '</div>'
1316                 );
1317         }
1318
1319         /**
1320          * Show the error text for a missing article. For articles in the MediaWiki
1321          * namespace, show the default message text. To be called from Article::view().
1322          */
1323         public function showMissingArticle() {
1324                 global $wgOut, $wgRequest, $wgUser;
1325
1326                 # Show info in user (talk) namespace. Does the user exist? Is he blocked?
1327                 if ( $this->mTitle->getNamespace() == NS_USER || $this->mTitle->getNamespace() == NS_USER_TALK ) {
1328                         $parts = explode( '/', $this->mTitle->getText() );
1329                         $rootPart = $parts[0];
1330                         $user = User::newFromName( $rootPart, false /* allow IP users*/ );
1331                         $ip = User::isIP( $rootPart );
1332
1333                         if ( !$user->isLoggedIn() && !$ip ) { # User does not exist
1334                                 $wgOut->wrapWikiMsg( "<div class=\"mw-userpage-userdoesnotexist error\">\n\$1\n</div>",
1335                                         array( 'userpage-userdoesnotexist-view', $rootPart ) );
1336                         } else if ( $user->isBlocked() ) { # Show log extract if the user is currently blocked
1337                                 LogEventsList::showLogExtract(
1338                                         $wgOut,
1339                                         'block',
1340                                         $user->getUserPage()->getPrefixedText(),
1341                                         '',
1342                                         array(
1343                                                 'lim' => 1,
1344                                                 'showIfEmpty' => false,
1345                                                 'msgKey' => array(
1346                                                         'blocked-notice-logextract',
1347                                                         $user->getName() # Support GENDER in notice
1348                                                 )
1349                                         )
1350                                 );
1351                         }
1352                 }
1353
1354                 wfRunHooks( 'ShowMissingArticle', array( $this ) );
1355
1356                 # Show delete and move logs
1357                 LogEventsList::showLogExtract( $wgOut, array( 'delete', 'move' ), $this->mTitle->getPrefixedText(), '',
1358                         array(  'lim' => 10,
1359                                 'conds' => array( "log_action != 'revision'" ),
1360                                 'showIfEmpty' => false,
1361                                 'msgKey' => array( 'moveddeleted-notice' ) )
1362                 );
1363
1364                 # Show error message
1365                 $oldid = $this->getOldID();
1366                 if ( $oldid ) {
1367                         $text = wfMsgNoTrans( 'missing-article',
1368                                 $this->mTitle->getPrefixedText(),
1369                                 wfMsgNoTrans( 'missingarticle-rev', $oldid ) );
1370                 } elseif ( $this->mTitle->getNamespace() === NS_MEDIAWIKI ) {
1371                         // Use the default message text
1372                         $text = $this->getContent();
1373                 } else {
1374                         $createErrors = $this->mTitle->getUserPermissionsErrors( 'create', $wgUser );
1375                         $editErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
1376                         $errors = array_merge( $createErrors, $editErrors );
1377
1378                         if ( !count( $errors ) ) {
1379                                 $text = wfMsgNoTrans( 'noarticletext' );
1380                         } else {
1381                                 $text = wfMsgNoTrans( 'noarticletext-nopermission' );
1382                         }
1383                 }
1384                 $text = "<div class='noarticletext'>\n$text\n</div>";
1385
1386                 if ( !$this->hasViewableContent() ) {
1387                         // If there's no backing content, send a 404 Not Found
1388                         // for better machine handling of broken links.
1389                         $wgRequest->response()->header( "HTTP/1.x 404 Not Found" );
1390                 }
1391
1392                 $wgOut->addWikiText( $text );
1393         }
1394
1395         /**
1396          * If the revision requested for view is deleted, check permissions.
1397          * Send either an error message or a warning header to $wgOut.
1398          *
1399          * @return boolean true if the view is allowed, false if not.
1400          */
1401         public function showDeletedRevisionHeader() {
1402                 global $wgOut, $wgRequest;
1403
1404                 if ( !$this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
1405                         // Not deleted
1406                         return true;
1407                 }
1408
1409                 // If the user is not allowed to see it...
1410                 if ( !$this->mRevision->userCan( Revision::DELETED_TEXT ) ) {
1411                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1412                                 'rev-deleted-text-permission' );
1413
1414                         return false;
1415                 // If the user needs to confirm that they want to see it...
1416                 } else if ( $wgRequest->getInt( 'unhide' ) != 1 ) {
1417                         # Give explanation and add a link to view the revision...
1418                         $oldid = intval( $this->getOldID() );
1419                         $link = $this->mTitle->getFullUrl( "oldid={$oldid}&unhide=1" );
1420                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1421                                 'rev-suppressed-text-unhide' : 'rev-deleted-text-unhide';
1422                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
1423                                 array( $msg, $link ) );
1424
1425                         return false;
1426                 // We are allowed to see...
1427                 } else {
1428                         $msg = $this->mRevision->isDeleted( Revision::DELETED_RESTRICTED ) ?
1429                                 'rev-suppressed-text-view' : 'rev-deleted-text-view';
1430                         $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", $msg );
1431
1432                         return true;
1433                 }
1434         }
1435
1436         /**
1437          * Should the parser cache be used?
1438          *
1439          * @return boolean
1440          */
1441         public function useParserCache( $oldid ) {
1442                 global $wgUser, $wgEnableParserCache;
1443
1444                 return $wgEnableParserCache
1445                         && intval( $wgUser->getOption( 'stubthreshold' ) ) == 0
1446                         && $this->exists()
1447                         && empty( $oldid )
1448                         && !$this->mTitle->isCssOrJsPage()
1449                         && !$this->mTitle->isCssJsSubpage();
1450         }
1451
1452         /**
1453          * Execute the uncached parse for action=view
1454          */
1455         public function doViewParse() {
1456                 global $wgOut;
1457
1458                 $oldid = $this->getOldID();
1459                 $useParserCache = $this->useParserCache( $oldid );
1460                 $parserOptions = clone $this->getParserOptions();
1461
1462                 # Render printable version, use printable version cache
1463                 $parserOptions->setIsPrintable( $wgOut->isPrintable() );
1464
1465                 # Don't show section-edit links on old revisions... this way lies madness.
1466                 $parserOptions->setEditSection( $this->isCurrent() );
1467                 $useParserCache = $this->useParserCache( $oldid );
1468                 $this->outputWikiText( $this->getContent(), $useParserCache, $parserOptions );
1469         }
1470
1471         /**
1472          * Try to fetch an expired entry from the parser cache. If it is present,
1473          * output it and return true. If it is not present, output nothing and
1474          * return false. This is used as a callback function for
1475          * PoolCounter::executeProtected().
1476          *
1477          * @return boolean
1478          */
1479         public function tryDirtyCache() {
1480
1481                 global $wgOut;
1482                 $parserCache = ParserCache::singleton();
1483                 $options = $this->getParserOptions();
1484                 $options->setIsPrintable( $wgOut->isPrintable() );
1485                 $output = $parserCache->getDirty( $this, $options );
1486
1487                 if ( $output ) {
1488                         wfDebug( __METHOD__ . ": sending dirty output\n" );
1489                         wfDebugLog( 'dirty', "dirty output " . $parserCache->getKey( $this, $options ) . "\n" );
1490                         $wgOut->setSquidMaxage( 0 );
1491                         $this->mParserOutput = $output;
1492                         $wgOut->addParserOutput( $output );
1493                         $wgOut->addHTML( "<!-- parser cache is expired, sending anyway due to pool overload-->\n" );
1494
1495                         return true;
1496                 } else {
1497                         wfDebugLog( 'dirty', "dirty missing\n" );
1498                         wfDebug( __METHOD__ . ": no dirty cache\n" );
1499
1500                         return false;
1501                 }
1502         }
1503
1504         /**
1505          * Show an error page for an error from the pool counter.
1506          * @param $status Status
1507          */
1508         public function showPoolError( $status ) {
1509                 global $wgOut;
1510
1511                 $wgOut->clearHTML(); // for release() errors
1512                 $wgOut->enableClientCache( false );
1513                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1514                 $wgOut->addWikiText(
1515                         '<div class="errorbox">' .
1516                         $status->getWikiText( false, 'view-pool-error' ) .
1517                         '</div>'
1518                 );
1519         }
1520
1521         /**
1522          * View redirect
1523          *
1524          * @param $target Title object or Array of destination(s) to redirect
1525          * @param $appendSubtitle Boolean [optional]
1526          * @param $forceKnown Boolean: should the image be shown as a bluelink regardless of existence?
1527          * @return string containing HMTL with redirect link
1528          */
1529         public function viewRedirect( $target, $appendSubtitle = true, $forceKnown = false ) {
1530                 global $wgOut, $wgContLang, $wgStylePath, $wgUser;
1531
1532                 if ( !is_array( $target ) ) {
1533                         $target = array( $target );
1534                 }
1535
1536                 $imageDir = $wgContLang->getDir();
1537
1538                 if ( $appendSubtitle ) {
1539                         $wgOut->appendSubtitle( wfMsgHtml( 'redirectpagesub' ) );
1540                 }
1541
1542                 $sk = $wgUser->getSkin();
1543                 // the loop prepends the arrow image before the link, so the first case needs to be outside
1544                 $title = array_shift( $target );
1545
1546                 if ( $forceKnown ) {
1547                         $link = $sk->linkKnown( $title, htmlspecialchars( $title->getFullText() ) );
1548                 } else {
1549                         $link = $sk->link( $title, htmlspecialchars( $title->getFullText() ) );
1550                 }
1551
1552                 $nextRedirect = $wgStylePath . '/common/images/nextredirect' . $imageDir . '.png';
1553                 $alt = $wgContLang->isRTL() ? '←' : '→';
1554                 // Automatically append redirect=no to each link, since most of them are redirect pages themselves.
1555                 // FIXME: where this happens?
1556                 foreach ( $target as $rt ) {
1557                         $link .= Html::element( 'img', array( 'src' => $nextRedirect, 'alt' => $alt ) );
1558                         if ( $forceKnown ) {
1559                                 $link .= $sk->linkKnown( $rt, htmlspecialchars( $rt->getFullText() ) );
1560                         } else {
1561                                 $link .= $sk->link( $rt, htmlspecialchars( $rt->getFullText() ) );
1562                         }
1563                 }
1564
1565                 $imageUrl = $wgStylePath . '/common/images/redirect' . $imageDir . '.png';
1566                 return Html::element( 'img', array( 'src' => $imageUrl, 'alt' => '#REDIRECT' ) ) .
1567                         '<span class="redirectText">' . $link . '</span>';
1568         }
1569
1570         /**
1571          * Builds trackback links for article display if $wgUseTrackbacks is set to true
1572          */
1573         public function addTrackbacks() {
1574                 global $wgOut, $wgUser;
1575
1576                 $dbr = wfGetDB( DB_SLAVE );
1577                 $tbs = $dbr->select( 'trackbacks',
1578                         array( 'tb_id', 'tb_title', 'tb_url', 'tb_ex', 'tb_name' ),
1579                         array( 'tb_page' => $this->getID() )
1580                 );
1581
1582                 if ( !$dbr->numRows( $tbs ) ) {
1583                         return;
1584                 }
1585
1586                 $tbtext = "";
1587                 while ( $o = $dbr->fetchObject( $tbs ) ) {
1588                         $rmvtxt = "";
1589
1590                         if ( $wgUser->isAllowed( 'trackback' ) ) {
1591                                 $delurl = $this->mTitle->getFullURL( "action=deletetrackback&tbid=" .
1592                                         $o->tb_id . "&token=" . urlencode( $wgUser->editToken() ) );
1593                                 $rmvtxt = wfMsg( 'trackbackremove', htmlspecialchars( $delurl ) );
1594                         }
1595
1596                         $tbtext .= "\n";
1597                         $tbtext .= wfMsgNoTrans( strlen( $o->tb_ex ) ? 'trackbackexcerpt' : 'trackback',
1598                                         $o->tb_title,
1599                                         $o->tb_url,
1600                                         $o->tb_ex,
1601                                         $o->tb_name,
1602                                         $rmvtxt );
1603                 }
1604
1605                 $wgOut->wrapWikiMsg( "<div id='mw_trackbacks'>\n$1\n</div>\n", array( 'trackbackbox', $tbtext ) );
1606         }
1607
1608         /**
1609          * Removes trackback record for current article from trackbacks table
1610          */
1611         public function deletetrackback() {
1612                 global $wgUser, $wgRequest, $wgOut;
1613
1614                 if ( !$wgUser->matchEditToken( $wgRequest->getVal( 'token' ) ) ) {
1615                         $wgOut->addWikiMsg( 'sessionfailure' );
1616
1617                         return;
1618                 }
1619
1620                 $permission_errors = $this->mTitle->getUserPermissionsErrors( 'delete', $wgUser );
1621
1622                 if ( count( $permission_errors ) ) {
1623                         $wgOut->showPermissionsErrorPage( $permission_errors );
1624
1625                         return;
1626                 }
1627
1628                 $db = wfGetDB( DB_MASTER );
1629                 $db->delete( 'trackbacks', array( 'tb_id' => $wgRequest->getInt( 'tbid' ) ) );
1630
1631                 $wgOut->addWikiMsg( 'trackbackdeleteok' );
1632                 $this->mTitle->invalidateCache();
1633         }
1634
1635         /**
1636          * Handle action=render
1637          */
1638
1639         public function render() {
1640                 global $wgOut;
1641
1642                 $wgOut->setArticleBodyOnly( true );
1643                 $this->view();
1644         }
1645
1646         /**
1647          * Handle action=purge
1648          */
1649         public function purge() {
1650                 global $wgUser, $wgRequest, $wgOut;
1651
1652                 if ( $wgUser->isAllowed( 'purge' ) || $wgRequest->wasPosted() ) {
1653                         //FIXME: shouldn't this be in doPurge()?
1654                         if ( wfRunHooks( 'ArticlePurge', array( &$this ) ) ) {
1655                                 $this->doPurge();
1656                                 $this->view();
1657                         }
1658                 } else {
1659                         $formParams = array(
1660                                 'method' => 'post',
1661                                 'action' =>  $wgRequest->getRequestURL(),
1662                         );
1663
1664                         $wgOut->addWikiMsg( 'confirm-purge-top' );
1665
1666                         $form  = Html::openElement( 'form', $formParams );
1667                         $form .= Xml::submitButton( wfMsg( 'confirm_purge_button' ) );
1668                         $form .= Html::closeElement( 'form' );
1669
1670                         $wgOut->addHTML( $form );
1671                         $wgOut->addWikiMsg( 'confirm-purge-bottom' );
1672
1673                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
1674                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
1675                 }
1676         }
1677
1678         /**
1679          * Perform the actions of a page purging
1680          */
1681         public function doPurge() {
1682                 global $wgUseSquid;
1683
1684                 // Invalidate the cache
1685                 $this->mTitle->invalidateCache();
1686
1687                 if ( $wgUseSquid ) {
1688                         // Commit the transaction before the purge is sent
1689                         $dbw = wfGetDB( DB_MASTER );
1690                         $dbw->commit();
1691
1692                         // Send purge
1693                         $update = SquidUpdate::newSimplePurge( $this->mTitle );
1694                         $update->doUpdate();
1695                 }
1696
1697                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1698                         global $wgMessageCache;
1699
1700                         if ( $this->getID() == 0 ) {
1701                                 $text = false;
1702                         } else {
1703                                 $text = $this->getRawText();
1704                         }
1705
1706                         $wgMessageCache->replace( $this->mTitle->getDBkey(), $text );
1707                 }
1708         }
1709
1710         /**
1711          * Insert a new empty page record for this article.
1712          * This *must* be followed up by creating a revision
1713          * and running $this->updateRevisionOn( ... );
1714          * or else the record will be left in a funky state.
1715          * Best if all done inside a transaction.
1716          *
1717          * @param $dbw Database
1718          * @return int The newly created page_id key, or false if the title already existed
1719          * @private
1720          */
1721         public function insertOn( $dbw ) {
1722                 wfProfileIn( __METHOD__ );
1723
1724                 $page_id = $dbw->nextSequenceValue( 'page_page_id_seq' );
1725                 $dbw->insert( 'page', array(
1726                         'page_id'           => $page_id,
1727                         'page_namespace'    => $this->mTitle->getNamespace(),
1728                         'page_title'        => $this->mTitle->getDBkey(),
1729                         'page_counter'      => 0,
1730                         'page_restrictions' => '',
1731                         'page_is_redirect'  => 0, # Will set this shortly...
1732                         'page_is_new'       => 1,
1733                         'page_random'       => wfRandom(),
1734                         'page_touched'      => $dbw->timestamp(),
1735                         'page_latest'       => 0, # Fill this in shortly...
1736                         'page_len'          => 0, # Fill this in shortly...
1737                 ), __METHOD__, 'IGNORE' );
1738
1739                 $affected = $dbw->affectedRows();
1740
1741                 if ( $affected ) {
1742                         $newid = $dbw->insertId();
1743                         $this->mTitle->resetArticleId( $newid );
1744                 }
1745                 wfProfileOut( __METHOD__ );
1746
1747                 return $affected ? $newid : false;
1748         }
1749
1750         /**
1751          * Update the page record to point to a newly saved revision.
1752          *
1753          * @param $dbw Database object
1754          * @param $revision Revision: For ID number, and text used to set
1755                             length and redirect status fields
1756          * @param $lastRevision Integer: if given, will not overwrite the page field
1757          *                      when different from the currently set value.
1758          *                      Giving 0 indicates the new page flag should be set
1759          *                      on.
1760          * @param $lastRevIsRedirect Boolean: if given, will optimize adding and
1761          *                           removing rows in redirect table.
1762          * @param $setNewFlag Boolean: Set to true if a page flag should be set
1763          *                    Needed when $lastRevision has to be set to sth. !=0
1764          * @return bool true on success, false on failure
1765          * @private
1766          */
1767         public function updateRevisionOn( &$dbw, $revision, $lastRevision = null, $lastRevIsRedirect = null, $setNewFlag = false ) {
1768                 wfProfileIn( __METHOD__ );
1769
1770                 $text = $revision->getText();
1771                 $rt = Title::newFromRedirect( $text );
1772
1773                 $conditions = array( 'page_id' => $this->getId() );
1774
1775                 if ( !is_null( $lastRevision ) ) {
1776                         # An extra check against threads stepping on each other
1777                         $conditions['page_latest'] = $lastRevision;
1778                 }
1779
1780                 if ( !$setNewFlag ) {
1781                         $setNewFlag = ( $lastRevision === 0 );
1782                 }
1783
1784                 $dbw->update( 'page',
1785                         array( /* SET */
1786                                 'page_latest'      => $revision->getId(),
1787                                 'page_touched'     => $dbw->timestamp(),
1788                                 'page_is_new'      => $setNewFlag,
1789                                 'page_is_redirect' => $rt !== null ? 1 : 0,
1790                                 'page_len'         => strlen( $text ),
1791                         ),
1792                         $conditions,
1793                         __METHOD__ );
1794
1795                 $result = $dbw->affectedRows() != 0;
1796                 if ( $result ) {
1797                         $this->updateRedirectOn( $dbw, $rt, $lastRevIsRedirect );
1798                 }
1799
1800                 wfProfileOut( __METHOD__ );
1801                 return $result;
1802         }
1803
1804         /**
1805          * Add row to the redirect table if this is a redirect, remove otherwise.
1806          *
1807          * @param $dbw Database
1808          * @param $redirectTitle a title object pointing to the redirect target,
1809          *                       or NULL if this is not a redirect
1810          * @param $lastRevIsRedirect If given, will optimize adding and
1811          *                           removing rows in redirect table.
1812          * @return bool true on success, false on failure
1813          * @private
1814          */
1815         public function updateRedirectOn( &$dbw, $redirectTitle, $lastRevIsRedirect = null ) {
1816                 // Always update redirects (target link might have changed)
1817                 // Update/Insert if we don't know if the last revision was a redirect or not
1818                 // Delete if changing from redirect to non-redirect
1819                 $isRedirect = !is_null( $redirectTitle );
1820
1821                 if ( $isRedirect || is_null( $lastRevIsRedirect ) || $lastRevIsRedirect !== $isRedirect ) {
1822                         wfProfileIn( __METHOD__ );
1823                         if ( $isRedirect ) {
1824                                 // This title is a redirect, Add/Update row in the redirect table
1825                                 $set = array( /* SET */
1826                                         'rd_namespace' => $redirectTitle->getNamespace(),
1827                                         'rd_title'     => $redirectTitle->getDBkey(),
1828                                         'rd_from'      => $this->getId(),
1829                                 );
1830                                 $dbw->replace( 'redirect', array( 'rd_from' ), $set, __METHOD__ );
1831                         } else {
1832                                 // This is not a redirect, remove row from redirect table
1833                                 $where = array( 'rd_from' => $this->getId() );
1834                                 $dbw->delete( 'redirect', $where, __METHOD__ );
1835                         }
1836
1837                         if ( $this->getTitle()->getNamespace() == NS_FILE ) {
1838                                 RepoGroup::singleton()->getLocalRepo()->invalidateImageRedirect( $this->getTitle() );
1839                         }
1840                         wfProfileOut( __METHOD__ );
1841
1842                         return ( $dbw->affectedRows() != 0 );
1843                 }
1844
1845                 return true;
1846         }
1847
1848         /**
1849          * If the given revision is newer than the currently set page_latest,
1850          * update the page record. Otherwise, do nothing.
1851          *
1852          * @param $dbw Database object
1853          * @param $revision Revision object
1854          * @return mixed
1855          */
1856         public function updateIfNewerOn( &$dbw, $revision ) {
1857                 wfProfileIn( __METHOD__ );
1858
1859                 $row = $dbw->selectRow(
1860                         array( 'revision', 'page' ),
1861                         array( 'rev_id', 'rev_timestamp', 'page_is_redirect' ),
1862                         array(
1863                                 'page_id' => $this->getId(),
1864                                 'page_latest=rev_id' ),
1865                         __METHOD__ );
1866
1867                 if ( $row ) {
1868                         if ( wfTimestamp( TS_MW, $row->rev_timestamp ) >= $revision->getTimestamp() ) {
1869                                 wfProfileOut( __METHOD__ );
1870                                 return false;
1871                         }
1872                         $prev = $row->rev_id;
1873                         $lastRevIsRedirect = (bool)$row->page_is_redirect;
1874                 } else {
1875                         # No or missing previous revision; mark the page as new
1876                         $prev = 0;
1877                         $lastRevIsRedirect = null;
1878                 }
1879
1880                 $ret = $this->updateRevisionOn( $dbw, $revision, $prev, $lastRevIsRedirect );
1881
1882                 wfProfileOut( __METHOD__ );
1883                 return $ret;
1884         }
1885
1886         /**
1887          * @param $section empty/null/false or a section number (0, 1, 2, T1, T2...)
1888          * @param $text String: new text of the section
1889          * @param $summary String: new section's subject, only if $section is 'new'
1890          * @param $edittime String: revision timestamp or null to use the current revision
1891          * @return string Complete article text, or null if error
1892          */
1893         public function replaceSection( $section, $text, $summary = '', $edittime = null ) {
1894                 wfProfileIn( __METHOD__ );
1895
1896                 if ( strval( $section ) == '' ) {
1897                         // Whole-page edit; let the whole text through
1898                 } else {
1899                         if ( is_null( $edittime ) ) {
1900                                 $rev = Revision::newFromTitle( $this->mTitle );
1901                         } else {
1902                                 $dbw = wfGetDB( DB_MASTER );
1903                                 $rev = Revision::loadFromTimestamp( $dbw, $this->mTitle, $edittime );
1904                         }
1905
1906                         if ( !$rev ) {
1907                                 wfDebug( "Article::replaceSection asked for bogus section (page: " .
1908                                         $this->getId() . "; section: $section; edittime: $edittime)\n" );
1909                                 return null;
1910                         }
1911
1912                         $oldtext = $rev->getText();
1913
1914                         if ( $section == 'new' ) {
1915                                 # Inserting a new section
1916                                 $subject = $summary ? wfMsgForContent( 'newsectionheaderdefaultlevel', $summary ) . "\n\n" : '';
1917                                 $text = strlen( trim( $oldtext ) ) > 0
1918                                                 ? "{$oldtext}\n\n{$subject}{$text}"
1919                                                 : "{$subject}{$text}";
1920                         } else {
1921                                 # Replacing an existing section; roll out the big guns
1922                                 global $wgParser;
1923
1924                                 $text = $wgParser->replaceSection( $oldtext, $section, $text );
1925                         }
1926                 }
1927
1928                 wfProfileOut( __METHOD__ );
1929                 return $text;
1930         }
1931
1932         /**
1933          * @deprecated use Article::doEdit()
1934          */
1935         function insertNewArticle( $text, $summary, $isminor, $watchthis, $suppressRC = false, $comment = false, $bot = false ) {
1936                 wfDeprecated( __METHOD__ );
1937                 $flags = EDIT_NEW | EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1938                         ( $isminor ? EDIT_MINOR : 0 ) |
1939                         ( $suppressRC ? EDIT_SUPPRESS_RC : 0 ) |
1940                         ( $bot ? EDIT_FORCE_BOT : 0 );
1941
1942                 $this->doEdit( $text, $summary, $flags, false, null, $watchthis, $comment, '', true );
1943         }
1944
1945         /**
1946          * @deprecated use Article::doEdit()
1947          */
1948         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
1949                 wfDeprecated( __METHOD__ );
1950                 $flags = EDIT_UPDATE | EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1951                         ( $minor ? EDIT_MINOR : 0 ) |
1952                         ( $forceBot ? EDIT_FORCE_BOT : 0 );
1953
1954                 $status = $this->doEdit( $text, $summary, $flags, false, null, $watchthis, false, $sectionanchor, true );
1955
1956                 if ( !$status->isOK() ) {
1957                         return false;
1958                 }
1959
1960                 return true;
1961         }
1962
1963         /**
1964          * Check flags and add EDIT_NEW or EDIT_UPDATE to them as needed.
1965          * @param $flags Int
1966          * @return Int updated $flags
1967          */
1968         function checkFlags( $flags ) {
1969                 if ( !( $flags & EDIT_NEW ) && !( $flags & EDIT_UPDATE ) ) {
1970                         if ( $this->mTitle->getArticleID() ) {
1971                                 $flags |= EDIT_UPDATE;
1972                         } else {
1973                                 $flags |= EDIT_NEW;
1974                         }
1975                 }
1976
1977                 return $flags;
1978         }
1979
1980         /**
1981          * Article::doEdit()
1982          *
1983          * Change an existing article or create a new article. Updates RC and all necessary caches,
1984          * optionally via the deferred update array.
1985          *
1986          * $wgUser must be set before calling this function.
1987          *
1988          * @param $text String: new text
1989          * @param $summary String: edit summary
1990          * @param $flags Integer bitfield:
1991          *      EDIT_NEW
1992          *          Article is known or assumed to be non-existent, create a new one
1993          *      EDIT_UPDATE
1994          *          Article is known or assumed to be pre-existing, update it
1995          *      EDIT_MINOR
1996          *          Mark this edit minor, if the user is allowed to do so
1997          *      EDIT_SUPPRESS_RC
1998          *          Do not log the change in recentchanges
1999          *      EDIT_FORCE_BOT
2000          *          Mark the edit a "bot" edit regardless of user rights
2001          *      EDIT_DEFER_UPDATES
2002          *          Defer some of the updates until the end of index.php
2003          *      EDIT_AUTOSUMMARY
2004          *          Fill in blank summaries with generated text where possible
2005          *
2006          * If neither EDIT_NEW nor EDIT_UPDATE is specified, the status of the article will be detected.
2007          * If EDIT_UPDATE is specified and the article doesn't exist, the function will an
2008          * edit-gone-missing error. If EDIT_NEW is specified and the article does exist, an
2009          * edit-already-exists error will be returned. These two conditions are also possible with
2010          * auto-detection due to MediaWiki's performance-optimised locking strategy.
2011          *
2012          * @param $baseRevId the revision ID this edit was based off, if any
2013          * @param $user Optional user object, $wgUser will be used if not passed
2014          * @param $watchthis Watch the page if true, unwatch the page if false, do nothing if null
2015          * @param $comment Boolean: whether the edit is a new section
2016          * @param $sectionanchor The section anchor for the page; used for redirecting the user back to the page
2017          *              after the edit is successfully committed
2018          * @param $redirect If true, redirect the user back to the page after the edit is successfully committed
2019          *
2020          * @return Status object. Possible errors:
2021          *     edit-hook-aborted:       The ArticleSave hook aborted the edit but didn't set the fatal flag of $status
2022          *     edit-gone-missing:       In update mode, but the article didn't exist
2023          *     edit-conflict:           In update mode, the article changed unexpectedly
2024          *     edit-no-change:          Warning that the text was the same as before
2025          *     edit-already-exists:     In creation mode, but the article already exists
2026          *
2027          *  Extensions may define additional errors.
2028          *
2029          *  $return->value will contain an associative array with members as follows:
2030          *     new:                     Boolean indicating if the function attempted to create a new article
2031          *     revision:                The revision object for the inserted revision, or null
2032          *
2033          *  Compatibility note: this function previously returned a boolean value indicating success/failure
2034          */
2035         public function doEdit( $text, $summary, $flags = 0, $baseRevId = false, $user = null , $watchthis = null,
2036                         $comment = false, $sectionanchor = '', $redirect = false) {
2037                 global $wgUser, $wgDBtransactions, $wgUseAutomaticEditSummaries;
2038
2039                 # Low-level sanity check
2040                 if ( $this->mTitle->getText() === '' ) {
2041                         throw new MWException( 'Something is trying to edit an article with an empty title' );
2042                 }
2043
2044                 wfProfileIn( __METHOD__ );
2045
2046                 $user = is_null( $user ) ? $wgUser : $user;
2047                 $status = Status::newGood( array() );
2048
2049                 # Load $this->mTitle->getArticleID() and $this->mLatest if it's not already
2050                 $this->loadPageData();
2051
2052                 $flags = $this->checkFlags( $flags );
2053
2054                 # If this is a comment, add the summary as headline
2055                 if ( $comment && $summary != "" ) {
2056                         $text = wfMsgForContent( 'newsectionheaderdefaultlevel', $summary ) . "\n\n" . $text;
2057                 }
2058
2059                 if ( !wfRunHooks( 'ArticleSave', array( &$this, &$user, &$text, &$summary,
2060                         $flags & EDIT_MINOR, &$watchthis, null, &$flags, &$status) ) )
2061                 {
2062                         wfDebug( __METHOD__ . ": ArticleSave hook aborted save!\n" );
2063                         wfProfileOut( __METHOD__ );
2064
2065                         if ( $status->isOK() ) {
2066                                 $status->fatal( 'edit-hook-aborted' );
2067                         }
2068
2069                         return $status;
2070                 }
2071
2072                 # Silently ignore EDIT_MINOR if not allowed
2073                 $isminor = ( $flags & EDIT_MINOR ) && $user->isAllowed( 'minoredit' );
2074                 $bot = $flags & EDIT_FORCE_BOT;
2075
2076                 $oldtext = $this->getRawText(); // current revision
2077                 $oldsize = strlen( $oldtext );
2078
2079                 # Provide autosummaries if one is not provided and autosummaries are enabled.
2080                 if ( $wgUseAutomaticEditSummaries && $flags & EDIT_AUTOSUMMARY && $summary == '' ) {
2081                         $summary = $this->getAutosummary( $oldtext, $text, $flags );
2082                 }
2083
2084                 $editInfo = $this->prepareTextForEdit( $text );
2085                 $text = $editInfo->pst;
2086                 $newsize = strlen( $text );
2087
2088                 $dbw = wfGetDB( DB_MASTER );
2089                 $now = wfTimestampNow();
2090                 $this->mTimestamp = $now;
2091
2092                 if ( $flags & EDIT_UPDATE ) {
2093                         # Update article, but only if changed.
2094                         $status->value['new'] = false;
2095
2096                         # Make sure the revision is either completely inserted or not inserted at all
2097                         if ( !$wgDBtransactions ) {
2098                                 $userAbort = ignore_user_abort( true );
2099                         }
2100
2101                         $revisionId = 0;
2102
2103                         $changed = ( strcmp( $text, $oldtext ) != 0 );
2104
2105                         if ( $changed ) {
2106                                 $this->mGoodAdjustment = (int)$this->isCountable( $text )
2107                                   - (int)$this->isCountable( $oldtext );
2108                                 $this->mTotalAdjustment = 0;
2109
2110                                 if ( !$this->mLatest ) {
2111                                         # Article gone missing
2112                                         wfDebug( __METHOD__ . ": EDIT_UPDATE specified but article doesn't exist\n" );
2113                                         $status->fatal( 'edit-gone-missing' );
2114
2115                                         wfProfileOut( __METHOD__ );
2116                                         return $status;
2117                                 }
2118
2119                                 $revision = new Revision( array(
2120                                         'page'       => $this->getId(),
2121                                         'comment'    => $summary,
2122                                         'minor_edit' => $isminor,
2123                                         'text'       => $text,
2124                                         'parent_id'  => $this->mLatest,
2125                                         'user'       => $user->getId(),
2126                                         'user_text'  => $user->getName(),
2127                                 ) );
2128
2129                                 $dbw->begin();
2130                                 $revisionId = $revision->insertOn( $dbw );
2131
2132                                 # Update page
2133                                 #
2134                                 # Note that we use $this->mLatest instead of fetching a value from the master DB
2135                                 # during the course of this function. This makes sure that EditPage can detect
2136                                 # edit conflicts reliably, either by $ok here, or by $article->getTimestamp()
2137                                 # before this function is called. A previous function used a separate query, this
2138                                 # creates a window where concurrent edits can cause an ignored edit conflict.
2139                                 $ok = $this->updateRevisionOn( $dbw, $revision, $this->mLatest );
2140
2141                                 if ( !$ok ) {
2142                                         /* Belated edit conflict! Run away!! */
2143                                         $status->fatal( 'edit-conflict' );
2144
2145                                         # Delete the invalid revision if the DB is not transactional
2146                                         if ( !$wgDBtransactions ) {
2147                                                 $dbw->delete( 'revision', array( 'rev_id' => $revisionId ), __METHOD__ );
2148                                         }
2149
2150                                         $revisionId = 0;
2151                                         $dbw->rollback();
2152                                 } else {
2153                                         global $wgUseRCPatrol;
2154                                         wfRunHooks( 'NewRevisionFromEditComplete', array( $this, $revision, $baseRevId, $user ) );
2155                                         # Update recentchanges
2156                                         if ( !( $flags & EDIT_SUPPRESS_RC ) ) {
2157                                                 # Mark as patrolled if the user can do so
2158                                                 $patrolled = $wgUseRCPatrol && $this->mTitle->userCan( 'autopatrol' );
2159                                                 # Add RC row to the DB
2160                                                 $rc = RecentChange::notifyEdit( $now, $this->mTitle, $isminor, $user, $summary,
2161                                                         $this->mLatest, $this->getTimestamp(), $bot, '', $oldsize, $newsize,
2162                                                         $revisionId, $patrolled
2163                                                 );
2164
2165                                                 # Log auto-patrolled edits
2166                                                 if ( $patrolled ) {
2167                                                         PatrolLog::record( $rc, true );
2168                                                 }
2169                                         }
2170                                         $user->incEditCount();
2171                                         $dbw->commit();
2172                                 }
2173                         } else {
2174                                 $status->warning( 'edit-no-change' );
2175                                 $revision = null;
2176                                 // Keep the same revision ID, but do some updates on it
2177                                 $revisionId = $this->getRevIdFetched();
2178                                 // Update page_touched, this is usually implicit in the page update
2179                                 // Other cache updates are done in onArticleEdit()
2180                                 $this->mTitle->invalidateCache();
2181                         }
2182
2183                         if ( !$wgDBtransactions ) {
2184                                 ignore_user_abort( $userAbort );
2185                         }
2186
2187                         // Now that ignore_user_abort is restored, we can respond to fatal errors
2188                         if ( !$status->isOK() ) {
2189                                 wfProfileOut( __METHOD__ );
2190                                 return $status;
2191                         }
2192
2193                         # Invalidate cache of this article and all pages using this article
2194                         # as a template. Partly deferred.
2195                         Article::onArticleEdit( $this->mTitle );
2196                         # Update links tables, site stats, etc.
2197                         $this->editUpdates( $text, $summary, $isminor, $now, $revisionId, $changed );
2198                 } else {
2199                         # Create new article
2200                         $status->value['new'] = true;
2201
2202                         # Set statistics members
2203                         # We work out if it's countable after PST to avoid counter drift
2204                         # when articles are created with {{subst:}}
2205                         $this->mGoodAdjustment = (int)$this->isCountable( $text );
2206                         $this->mTotalAdjustment = 1;
2207
2208                         $dbw->begin();
2209
2210                         # Add the page record; stake our claim on this title!
2211                         # This will return false if the article already exists
2212                         $newid = $this->insertOn( $dbw );
2213
2214                         if ( $newid === false ) {
2215                                 $dbw->rollback();
2216                                 $status->fatal( 'edit-already-exists' );
2217
2218                                 wfProfileOut( __METHOD__ );
2219                                 return $status;
2220                         }
2221
2222                         # Save the revision text...
2223                         $revision = new Revision( array(
2224                                 'page'       => $newid,
2225                                 'comment'    => $summary,
2226                                 'minor_edit' => $isminor,
2227                                 'text'       => $text,
2228                                 'user'       => $user->getId(),
2229                                 'user_text'  => $user->getName(),
2230                                 ) );
2231                         $revisionId = $revision->insertOn( $dbw );
2232
2233                         $this->mTitle->resetArticleID( $newid );
2234
2235                         # Update the page record with revision data
2236                         $this->updateRevisionOn( $dbw, $revision, 0 );
2237
2238                         wfRunHooks( 'NewRevisionFromEditComplete', array( $this, $revision, false, $user ) );
2239
2240                         # Update recentchanges
2241                         if ( !( $flags & EDIT_SUPPRESS_RC ) ) {
2242                                 global $wgUseRCPatrol, $wgUseNPPatrol;
2243
2244                                 # Mark as patrolled if the user can do so
2245                                 $patrolled = ( $wgUseRCPatrol || $wgUseNPPatrol ) && $this->mTitle->userCan( 'autopatrol' );
2246                                 # Add RC row to the DB
2247                                 $rc = RecentChange::notifyNew( $now, $this->mTitle, $isminor, $user, $summary, $bot,
2248                                         '', strlen( $text ), $revisionId, $patrolled );
2249
2250                                 # Log auto-patrolled edits
2251                                 if ( $patrolled ) {
2252                                         PatrolLog::record( $rc, true );
2253                                 }
2254                         }
2255                         $user->incEditCount();
2256                         $dbw->commit();
2257
2258                         # Update links, etc.
2259                         $this->editUpdates( $text, $summary, $isminor, $now, $revisionId, true );
2260
2261                         # Clear caches
2262                         Article::onArticleCreate( $this->mTitle );
2263
2264                         wfRunHooks( 'ArticleInsertComplete', array( &$this, &$user, $text, $summary,
2265                                 $flags & EDIT_MINOR, &$watchthis, null, &$flags, $revision ) );
2266                 }
2267
2268                 # Do updates right now unless deferral was requested
2269                 if ( !( $flags & EDIT_DEFER_UPDATES ) ) {
2270                         wfDoUpdates();
2271                 }
2272
2273                 // Return the new revision (or null) to the caller
2274                 $status->value['revision'] = $revision;
2275
2276                 wfRunHooks( 'ArticleSaveComplete', array( &$this, &$user, $text, $summary,
2277                         $flags & EDIT_MINOR, &$watchthis, null, &$flags, $revision, &$status, $baseRevId,
2278                         &$redirect) );
2279
2280                 # Watch or unwatch the page
2281                 if ( $watchthis === true ) {
2282                         if ( !$this->mTitle->userIsWatching() ) {
2283                                 $dbw->begin();
2284                                 $this->doWatch();
2285                                 $dbw->commit();
2286                         }
2287                 } elseif ( $watchthis === false ) {
2288                         if ( $this->mTitle->userIsWatching() ) {
2289                                 $dbw->begin();
2290                                 $this->doUnwatch();
2291                                 $dbw->commit();
2292                         }
2293                 }
2294
2295                 # Give extensions a chance to modify URL query on update
2296                 $extraQuery = '';
2297
2298                 wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this, &$sectionanchor, &$extraQuery ) );
2299
2300                 if ( $redirect ) {
2301                         if ( $sectionanchor || $extraQuery ) {
2302                                 $this->doRedirect( $this->isRedirect( $text ), $sectionanchor, $extraQuery );
2303                         } else {
2304                                 $this->doRedirect( $this->isRedirect( $text ) );
2305                         }
2306                 }
2307
2308                 wfProfileOut( __METHOD__ );
2309
2310                 return $status;
2311         }
2312
2313         /**
2314          * @deprecated wrapper for doRedirect
2315          */
2316         public function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid ) {
2317                 wfDeprecated( __METHOD__ );
2318                 $this->doRedirect( $this->isRedirect( $text ), $sectionanchor );
2319         }
2320
2321         /**
2322          * Output a redirect back to the article.
2323          * This is typically used after an edit.
2324          *
2325          * @param $noRedir Boolean: add redirect=no
2326          * @param $sectionAnchor String: section to redirect to, including "#"
2327          * @param $extraQuery String: extra query params
2328          */
2329         public function doRedirect( $noRedir = false, $sectionAnchor = '', $extraQuery = '' ) {
2330                 global $wgOut;
2331
2332                 if ( $noRedir ) {
2333                         $query = 'redirect=no';
2334                         if ( $extraQuery )
2335                                 $query .= "&$extraQuery";
2336                 } else {
2337                         $query = $extraQuery;
2338                 }
2339
2340                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $sectionAnchor );
2341         }
2342
2343         /**
2344          * Mark this particular edit/page as patrolled
2345          */
2346         public function markpatrolled() {
2347                 global $wgOut, $wgRequest, $wgUseRCPatrol, $wgUseNPPatrol, $wgUser;
2348
2349                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2350
2351                 # If we haven't been given an rc_id value, we can't do anything
2352                 $rcid = (int) $wgRequest->getVal( 'rcid' );
2353                 $rc = RecentChange::newFromId( $rcid );
2354
2355                 if ( is_null( $rc ) ) {
2356                         $wgOut->showErrorPage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
2357                         return;
2358                 }
2359
2360                 # It would be nice to see where the user had actually come from, but for now just guess
2361                 $returnto = $rc->getAttribute( 'rc_type' ) == RC_NEW ? 'Newpages' : 'Recentchanges';
2362                 $return = SpecialPage::getTitleFor( $returnto );
2363
2364                 $dbw = wfGetDB( DB_MASTER );
2365                 $errors = $rc->doMarkPatrolled();
2366
2367                 if ( in_array( array( 'rcpatroldisabled' ), $errors ) ) {
2368                         $wgOut->showErrorPage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
2369
2370                         return;
2371                 }
2372
2373                 if ( in_array( array( 'hookaborted' ), $errors ) ) {
2374                         // The hook itself has handled any output
2375                         return;
2376                 }
2377
2378                 if ( in_array( array( 'markedaspatrollederror-noautopatrol' ), $errors ) ) {
2379                         $wgOut->setPageTitle( wfMsg( 'markedaspatrollederror' ) );
2380                         $wgOut->addWikiMsg( 'markedaspatrollederror-noautopatrol' );
2381                         $wgOut->returnToMain( false, $return );
2382
2383                         return;
2384                 }
2385
2386                 if ( !empty( $errors ) ) {
2387                         $wgOut->showPermissionsErrorPage( $errors );
2388
2389                         return;
2390                 }
2391
2392                 # Inform the user
2393                 $wgOut->setPageTitle( wfMsg( 'markedaspatrolled' ) );
2394                 $wgOut->addWikiMsg( 'markedaspatrolledtext', $rc->getTitle()->getPrefixedText() );
2395                 $wgOut->returnToMain( false, $return );
2396         }
2397
2398         /**
2399          * User-interface handler for the "watch" action
2400          */
2401         public function watch() {
2402                 global $wgUser, $wgOut;
2403
2404                 if ( $wgUser->isAnon() ) {
2405                         $wgOut->showErrorPage( 'watchnologin', 'watchnologintext' );
2406                         return;
2407                 }
2408
2409                 if ( wfReadOnly() ) {
2410                         $wgOut->readOnlyPage();
2411                         return;
2412                 }
2413
2414                 if ( $this->doWatch() ) {
2415                         $wgOut->setPagetitle( wfMsg( 'addedwatch' ) );
2416                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
2417                         $wgOut->addWikiMsg( 'addedwatchtext', $this->mTitle->getPrefixedText() );
2418                 }
2419
2420                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
2421         }
2422
2423         /**
2424          * Add this page to $wgUser's watchlist
2425          * @return bool true on successful watch operation
2426          */
2427         public function doWatch() {
2428                 global $wgUser;
2429
2430                 if ( $wgUser->isAnon() ) {
2431                         return false;
2432                 }
2433
2434                 if ( wfRunHooks( 'WatchArticle', array( &$wgUser, &$this ) ) ) {
2435                         $wgUser->addWatch( $this->mTitle );
2436                         return wfRunHooks( 'WatchArticleComplete', array( &$wgUser, &$this ) );
2437                 }
2438
2439                 return false;
2440         }
2441
2442         /**
2443          * User interface handler for the "unwatch" action.
2444          */
2445         public function unwatch() {
2446                 global $wgUser, $wgOut;
2447
2448                 if ( $wgUser->isAnon() ) {
2449                         $wgOut->showErrorPage( 'watchnologin', 'watchnologintext' );
2450                         return;
2451                 }
2452
2453                 if ( wfReadOnly() ) {
2454                         $wgOut->readOnlyPage();
2455                         return;
2456                 }
2457
2458                 if ( $this->doUnwatch() ) {
2459                         $wgOut->setPagetitle( wfMsg( 'removedwatch' ) );
2460                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
2461                         $wgOut->addWikiMsg( 'removedwatchtext', $this->mTitle->getPrefixedText() );
2462                 }
2463
2464                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
2465         }
2466
2467         /**
2468          * Stop watching a page
2469          * @return bool true on successful unwatch
2470          */
2471         public function doUnwatch() {
2472                 global $wgUser;
2473
2474                 if ( $wgUser->isAnon() ) {
2475                         return false;
2476                 }
2477
2478                 if ( wfRunHooks( 'UnwatchArticle', array( &$wgUser, &$this ) ) ) {
2479                         $wgUser->removeWatch( $this->mTitle );
2480                         return wfRunHooks( 'UnwatchArticleComplete', array( &$wgUser, &$this ) );
2481                 }
2482
2483                 return false;
2484         }
2485
2486         /**
2487          * action=protect handler
2488          */
2489         public function protect() {
2490                 $form = new ProtectionForm( $this );
2491                 $form->execute();
2492         }
2493
2494         /**
2495          * action=unprotect handler (alias)
2496          */
2497         public function unprotect() {
2498                 $this->protect();
2499         }
2500
2501         /**
2502          * Update the article's restriction field, and leave a log entry.
2503          *
2504          * @param $limit Array: set of restriction keys
2505          * @param $reason String
2506          * @param &$cascade Integer. Set to false if cascading protection isn't allowed.
2507          * @param $expiry Array: per restriction type expiration
2508          * @return bool true on success
2509          */
2510         public function updateRestrictions( $limit = array(), $reason = '', &$cascade = 0, $expiry = array() ) {
2511                 global $wgUser, $wgContLang;
2512
2513                 $restrictionTypes = $this->mTitle->getRestrictionTypes();
2514
2515                 $id = $this->mTitle->getArticleID();
2516
2517                 if ( $id <= 0 ) {
2518                         wfDebug( "updateRestrictions failed: $id <= 0\n" );
2519                         return false;
2520                 }
2521
2522                 if ( wfReadOnly() ) {
2523                         wfDebug( "updateRestrictions failed: read-only\n" );
2524                         return false;
2525                 }
2526
2527                 if ( !$this->mTitle->userCan( 'protect' ) ) {
2528                         wfDebug( "updateRestrictions failed: insufficient permissions\n" );
2529                         return false;
2530                 }
2531
2532                 if ( !$cascade ) {
2533                         $cascade = false;
2534                 }
2535
2536                 // Take this opportunity to purge out expired restrictions
2537                 Title::purgeExpiredRestrictions();
2538
2539                 # FIXME: Same limitations as described in ProtectionForm.php (line 37);
2540                 # we expect a single selection, but the schema allows otherwise.
2541                 $current = array();
2542                 $updated = Article::flattenRestrictions( $limit );
2543                 $changed = false;
2544
2545                 foreach ( $restrictionTypes as $action ) {
2546                         if ( isset( $expiry[$action] ) ) {
2547                                 # Get current restrictions on $action
2548                                 $aLimits = $this->mTitle->getRestrictions( $action );
2549                                 $current[$action] = implode( '', $aLimits );
2550                                 # Are any actual restrictions being dealt with here?
2551                                 $aRChanged = count( $aLimits ) || !empty( $limit[$action] );
2552
2553                                 # If something changed, we need to log it. Checking $aRChanged
2554                                 # assures that "unprotecting" a page that is not protected does
2555                                 # not log just because the expiry was "changed".
2556                                 if ( $aRChanged && $this->mTitle->mRestrictionsExpiry[$action] != $expiry[$action] ) {
2557                                         $changed = true;
2558                                 }
2559                         }
2560                 }
2561
2562                 $current = Article::flattenRestrictions( $current );
2563
2564                 $changed = ( $changed || $current != $updated );
2565                 $changed = $changed || ( $updated && $this->mTitle->areRestrictionsCascading() != $cascade );
2566                 $protect = ( $updated != '' );
2567
2568                 # If nothing's changed, do nothing
2569                 if ( $changed ) {
2570                         if ( wfRunHooks( 'ArticleProtect', array( &$this, &$wgUser, $limit, $reason ) ) ) {
2571                                 $dbw = wfGetDB( DB_MASTER );
2572
2573                                 # Prepare a null revision to be added to the history
2574                                 $modified = $current != '' && $protect;
2575
2576                                 if ( $protect ) {
2577                                         $comment_type = $modified ? 'modifiedarticleprotection' : 'protectedarticle';
2578                                 } else {
2579                                         $comment_type = 'unprotectedarticle';
2580                                 }
2581
2582                                 $comment = $wgContLang->ucfirst( wfMsgForContent( $comment_type, $this->mTitle->getPrefixedText() ) );
2583
2584                                 # Only restrictions with the 'protect' right can cascade...
2585                                 # Otherwise, people who cannot normally protect can "protect" pages via transclusion
2586                                 $editrestriction = isset( $limit['edit'] ) ? array( $limit['edit'] ) : $this->mTitle->getRestrictions( 'edit' );
2587
2588                                 # The schema allows multiple restrictions
2589                                 if ( !in_array( 'protect', $editrestriction ) && !in_array( 'sysop', $editrestriction ) ) {
2590                                         $cascade = false;
2591                                 }
2592
2593                                 $cascade_description = '';
2594
2595                                 if ( $cascade ) {
2596                                         $cascade_description = ' [' . wfMsgForContent( 'protect-summary-cascade' ) . ']';
2597                                 }
2598
2599                                 if ( $reason ) {
2600                                         $comment .= ": $reason";
2601                                 }
2602
2603                                 $editComment = $comment;
2604                                 $encodedExpiry = array();
2605                                 $protect_description = '';
2606                                 foreach ( $limit as $action => $restrictions ) {
2607                                         if ( !isset( $expiry[$action] ) )
2608                                                 $expiry[$action] = 'infinite';
2609
2610                                         $encodedExpiry[$action] = Block::encodeExpiry( $expiry[$action], $dbw );
2611                                         if ( $restrictions != '' ) {
2612                                                 $protect_description .= "[$action=$restrictions] (";
2613                                                 if ( $encodedExpiry[$action] != 'infinity' ) {
2614                                                         $protect_description .= wfMsgForContent( 'protect-expiring',
2615                                                                 $wgContLang->timeanddate( $expiry[$action], false, false ) ,
2616                                                                 $wgContLang->date( $expiry[$action], false, false ) ,
2617                                                                 $wgContLang->time( $expiry[$action], false, false ) );
2618                                                 } else {
2619                                                         $protect_description .= wfMsgForContent( 'protect-expiry-indefinite' );
2620                                                 }
2621
2622                                                 $protect_description .= ') ';
2623                                         }
2624                                 }
2625                                 $protect_description = trim( $protect_description );
2626
2627                                 if ( $protect_description && $protect ) {
2628                                         $editComment .= " ($protect_description)";
2629                                 }
2630
2631                                 if ( $cascade ) {
2632                                         $editComment .= "$cascade_description";
2633                                 }
2634
2635                                 # Update restrictions table
2636                                 foreach ( $limit as $action => $restrictions ) {
2637                                         if ( $restrictions != '' ) {
2638                                                 $dbw->replace( 'page_restrictions', array( array( 'pr_page', 'pr_type' ) ),
2639                                                         array( 'pr_page' => $id,
2640                                                                 'pr_type' => $action,
2641                                                                 'pr_level' => $restrictions,
2642                                                                 'pr_cascade' => ( $cascade && $action == 'edit' ) ? 1 : 0,
2643                                                                 'pr_expiry' => $encodedExpiry[$action]
2644                                                         ),
2645                                                         __METHOD__
2646                                                 );
2647                                         } else {
2648                                                 $dbw->delete( 'page_restrictions', array( 'pr_page' => $id,
2649                                                         'pr_type' => $action ), __METHOD__ );
2650                                         }
2651                                 }
2652
2653                                 # Insert a null revision
2654                                 $nullRevision = Revision::newNullRevision( $dbw, $id, $editComment, true );
2655                                 $nullRevId = $nullRevision->insertOn( $dbw );
2656
2657                                 $latest = $this->getLatest();
2658                                 # Update page record
2659                                 $dbw->update( 'page',
2660                                         array( /* SET */
2661                                                 'page_touched' => $dbw->timestamp(),
2662                                                 'page_restrictions' => '',
2663                                                 'page_latest' => $nullRevId
2664                                         ), array( /* WHERE */
2665                                                 'page_id' => $id
2666                                         ), 'Article::protect'
2667                                 );
2668
2669                                 wfRunHooks( 'NewRevisionFromEditComplete', array( $this, $nullRevision, $latest, $wgUser ) );
2670                                 wfRunHooks( 'ArticleProtectComplete', array( &$this, &$wgUser, $limit, $reason ) );
2671
2672                                 # Update the protection log
2673                                 $log = new LogPage( 'protect' );
2674                                 if ( $protect ) {
2675                                         $params = array( $protect_description, $cascade ? 'cascade' : '' );
2676                                         $log->addEntry( $modified ? 'modify' : 'protect', $this->mTitle, trim( $reason ), $params );
2677                                 } else {
2678                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
2679                                 }
2680                         } # End hook
2681                 } # End "changed" check
2682
2683                 return true;
2684         }
2685
2686         /**
2687          * Take an array of page restrictions and flatten it to a string
2688          * suitable for insertion into the page_restrictions field.
2689          * @param $limit Array
2690          * @return String
2691          */
2692         protected static function flattenRestrictions( $limit ) {
2693                 if ( !is_array( $limit ) ) {
2694                         throw new MWException( 'Article::flattenRestrictions given non-array restriction set' );
2695                 }
2696
2697                 $bits = array();
2698                 ksort( $limit );
2699
2700                 foreach ( $limit as $action => $restrictions ) {
2701                         if ( $restrictions != '' ) {
2702                                 $bits[] = "$action=$restrictions";
2703                         }
2704                 }
2705
2706                 return implode( ':', $bits );
2707         }
2708
2709         /**
2710          * Auto-generates a deletion reason
2711          *
2712          * @param &$hasHistory Boolean: whether the page has a history
2713          * @return mixed String containing deletion reason or empty string, or boolean false
2714          *    if no revision occurred
2715          */
2716         public function generateReason( &$hasHistory ) {
2717                 global $wgContLang;
2718
2719                 $dbw = wfGetDB( DB_MASTER );
2720                 // Get the last revision
2721                 $rev = Revision::newFromTitle( $this->mTitle );
2722
2723                 if ( is_null( $rev ) ) {
2724                         return false;
2725                 }
2726
2727                 // Get the article's contents
2728                 $contents = $rev->getText();
2729                 $blank = false;
2730
2731                 // If the page is blank, use the text from the previous revision,
2732                 // which can only be blank if there's a move/import/protect dummy revision involved
2733                 if ( $contents == '' ) {
2734                         $prev = $rev->getPrevious();
2735
2736                         if ( $prev )    {
2737                                 $contents = $prev->getText();
2738                                 $blank = true;
2739                         }
2740                 }
2741
2742                 // Find out if there was only one contributor
2743                 // Only scan the last 20 revisions
2744                 $res = $dbw->select( 'revision', 'rev_user_text',
2745                         array( 'rev_page' => $this->getID(), $dbw->bitAnd( 'rev_deleted', Revision::DELETED_USER ) . ' = 0' ),
2746                         __METHOD__,
2747                         array( 'LIMIT' => 20 )
2748                 );
2749
2750                 if ( $res === false ) {
2751                         // This page has no revisions, which is very weird
2752                         return false;
2753                 }
2754
2755                 $hasHistory = ( $res->numRows() > 1 );
2756                 $row = $dbw->fetchObject( $res );
2757
2758                 if ( $row ) { // $row is false if the only contributor is hidden
2759                         $onlyAuthor = $row->rev_user_text;
2760                         // Try to find a second contributor
2761                         foreach ( $res as $row ) {
2762                                 if ( $row->rev_user_text != $onlyAuthor ) { // Bug 22999
2763                                         $onlyAuthor = false;
2764                                         break;
2765                                 }
2766                         }
2767                 } else {
2768                         $onlyAuthor = false;
2769                 }
2770
2771                 $dbw->freeResult( $res );
2772
2773                 // Generate the summary with a '$1' placeholder
2774                 if ( $blank ) {
2775                         // The current revision is blank and the one before is also
2776                         // blank. It's just not our lucky day
2777                         $reason = wfMsgForContent( 'exbeforeblank', '$1' );
2778                 } else {
2779                         if ( $onlyAuthor ) {
2780                                 $reason = wfMsgForContent( 'excontentauthor', '$1', $onlyAuthor );
2781                         } else {
2782                                 $reason = wfMsgForContent( 'excontent', '$1' );
2783                         }
2784                 }
2785
2786                 if ( $reason == '-' ) {
2787                         // Allow these UI messages to be blanked out cleanly
2788                         return '';
2789                 }
2790
2791                 // Replace newlines with spaces to prevent uglyness
2792                 $contents = preg_replace( "/[\n\r]/", ' ', $contents );
2793                 // Calculate the maximum amount of chars to get
2794                 // Max content length = max comment length - length of the comment (excl. $1) - '...'
2795                 $maxLength = 255 - ( strlen( $reason ) - 2 ) - 3;
2796                 $contents = $wgContLang->truncate( $contents, $maxLength );
2797                 // Remove possible unfinished links
2798                 $contents = preg_replace( '/\[\[([^\]]*)\]?$/', '$1', $contents );
2799                 // Now replace the '$1' placeholder
2800                 $reason = str_replace( '$1', $contents, $reason );
2801
2802                 return $reason;
2803         }
2804
2805
2806         /*
2807          * UI entry point for page deletion
2808          */
2809         public function delete() {
2810                 global $wgUser, $wgOut, $wgRequest;
2811
2812                 $confirm = $wgRequest->wasPosted() &&
2813                                 $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
2814
2815                 $this->DeleteReasonList = $wgRequest->getText( 'wpDeleteReasonList', 'other' );
2816                 $this->DeleteReason = $wgRequest->getText( 'wpReason' );
2817
2818                 $reason = $this->DeleteReasonList;
2819
2820                 if ( $reason != 'other' && $this->DeleteReason != '' ) {
2821                         // Entry from drop down menu + additional comment
2822                         $reason .= wfMsgForContent( 'colon-separator' ) . $this->DeleteReason;
2823                 } elseif ( $reason == 'other' ) {
2824                         $reason = $this->DeleteReason;
2825                 }
2826
2827                 # Flag to hide all contents of the archived revisions
2828                 $suppress = $wgRequest->getVal( 'wpSuppress' ) && $wgUser->isAllowed( 'suppressrevision' );
2829
2830                 # This code desperately needs to be totally rewritten
2831
2832                 # Read-only check...
2833                 if ( wfReadOnly() ) {
2834                         $wgOut->readOnlyPage();
2835
2836                         return;
2837                 }
2838
2839                 # Check permissions
2840                 $permission_errors = $this->mTitle->getUserPermissionsErrors( 'delete', $wgUser );
2841
2842                 if ( count( $permission_errors ) > 0 ) {
2843                         $wgOut->showPermissionsErrorPage( $permission_errors );
2844
2845                         return;
2846                 }
2847
2848                 $wgOut->setPagetitle( wfMsg( 'delete-confirm', $this->mTitle->getPrefixedText() ) );
2849
2850                 # Better double-check that it hasn't been deleted yet!
2851                 $dbw = wfGetDB( DB_MASTER );
2852                 $conds = $this->mTitle->pageCond();
2853                 $latest = $dbw->selectField( 'page', 'page_latest', $conds, __METHOD__ );
2854                 if ( $latest === false ) {
2855                         $wgOut->showFatalError(
2856                                 Html::rawElement(
2857                                         'div',
2858                                         array( 'class' => 'error mw-error-cannotdelete' ),
2859                                         wfMsgExt( 'cannotdelete', array( 'parse' ), $this->mTitle->getPrefixedText() )
2860                                 )
2861                         );
2862                         $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
2863                         LogEventsList::showLogExtract(
2864                                 $wgOut,
2865                                 'delete',
2866                                 $this->mTitle->getPrefixedText()
2867                         );
2868
2869                         return;
2870                 }
2871
2872                 # Hack for big sites
2873                 $bigHistory = $this->isBigDeletion();
2874                 if ( $bigHistory && !$this->mTitle->userCan( 'bigdelete' ) ) {
2875                         global $wgLang, $wgDeleteRevisionsLimit;
2876
2877                         $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
2878                                 array( 'delete-toobig', $wgLang->formatNum( $wgDeleteRevisionsLimit ) ) );
2879
2880                         return;
2881                 }
2882
2883                 if ( $confirm ) {
2884                         $this->doDelete( $reason, $suppress );
2885
2886                         if ( $wgRequest->getCheck( 'wpWatch' ) && $wgUser->isLoggedIn() ) {
2887                                 $this->doWatch();
2888                         } elseif ( $this->mTitle->userIsWatching() ) {
2889                                 $this->doUnwatch();
2890                         }
2891
2892                         return;
2893                 }
2894
2895                 // Generate deletion reason
2896                 $hasHistory = false;
2897                 if ( !$reason ) {
2898                         $reason = $this->generateReason( $hasHistory );
2899                 }
2900
2901                 // If the page has a history, insert a warning
2902                 if ( $hasHistory && !$confirm ) {
2903                         global $wgLang;
2904
2905                         $skin = $wgUser->getSkin();
2906                         $revisions = $this->estimateRevisionCount();
2907                         //FIXME: lego
2908                         $wgOut->addHTML( '<strong class="mw-delete-warning-revisions">' .
2909                                 wfMsgExt( 'historywarning', array( 'parseinline' ), $wgLang->formatNum( $revisions ) ) .
2910                                 wfMsgHtml( 'word-separator' ) . $skin->historyLink() .
2911                                 '</strong>'
2912                         );
2913
2914                         if ( $bigHistory ) {
2915                                 global $wgDeleteRevisionsLimit;
2916
2917                                 $wgOut->wrapWikiMsg( "<div class='error'>\n$1\n</div>\n",
2918                                         array( 'delete-warning-toobig', $wgLang->formatNum( $wgDeleteRevisionsLimit ) ) );
2919                         }
2920                 }
2921
2922                 return $this->confirmDelete( $reason );
2923         }
2924
2925         /**
2926          * @return bool whether or not the page surpasses $wgDeleteRevisionsLimit revisions
2927          */
2928         public function isBigDeletion() {
2929                 global $wgDeleteRevisionsLimit;
2930
2931                 if ( $wgDeleteRevisionsLimit ) {
2932                         $revCount = $this->estimateRevisionCount();
2933
2934                         return $revCount > $wgDeleteRevisionsLimit;
2935                 }
2936
2937                 return false;
2938         }
2939
2940         /**
2941          * @return int approximate revision count
2942          */
2943         public function estimateRevisionCount() {
2944                 $dbr = wfGetDB( DB_SLAVE );
2945
2946                 // For an exact count...
2947                 // return $dbr->selectField( 'revision', 'COUNT(*)',
2948                 //      array( 'rev_page' => $this->getId() ), __METHOD__ );
2949                 return $dbr->estimateRowCount( 'revision', '*',
2950                         array( 'rev_page' => $this->getId() ), __METHOD__ );
2951         }
2952
2953         /**
2954          * Get the last N authors
2955          * @param $num Integer: number of revisions to get
2956          * @param $revLatest String: the latest rev_id, selected from the master (optional)
2957          * @return array Array of authors, duplicates not removed
2958          */
2959         public function getLastNAuthors( $num, $revLatest = 0 ) {
2960                 wfProfileIn( __METHOD__ );
2961                 // First try the slave
2962                 // If that doesn't have the latest revision, try the master
2963                 $continue = 2;
2964                 $db = wfGetDB( DB_SLAVE );
2965
2966                 do {
2967                         $res = $db->select( array( 'page', 'revision' ),
2968                                 array( 'rev_id', 'rev_user_text' ),
2969                                 array(
2970                                         'page_namespace' => $this->mTitle->getNamespace(),
2971                                         'page_title' => $this->mTitle->getDBkey(),
2972                                         'rev_page = page_id'
2973                                 ), __METHOD__, $this->getSelectOptions( array(
2974                                         'ORDER BY' => 'rev_timestamp DESC',
2975                                         'LIMIT' => $num
2976                                 ) )
2977                         );
2978
2979                         if ( !$res ) {
2980                                 wfProfileOut( __METHOD__ );
2981                                 return array();
2982                         }
2983
2984                         $row = $db->fetchObject( $res );
2985
2986                         if ( $continue == 2 && $revLatest && $row->rev_id != $revLatest ) {
2987                                 $db = wfGetDB( DB_MASTER );
2988                                 $continue--;
2989                         } else {
2990                                 $continue = 0;
2991                         }
2992                 } while ( $continue );
2993
2994                 $authors = array( $row->rev_user_text );
2995
2996                 while ( $row = $db->fetchObject( $res ) ) {
2997                         $authors[] = $row->rev_user_text;
2998                 }
2999
3000                 wfProfileOut( __METHOD__ );
3001                 return $authors;
3002         }
3003
3004         /**
3005          * Output deletion confirmation dialog
3006          * FIXME: Move to another file?
3007          * @param $reason String: prefilled reason
3008          */
3009         public function confirmDelete( $reason ) {
3010                 global $wgOut, $wgUser;
3011
3012                 wfDebug( "Article::confirmDelete\n" );
3013
3014                 $deleteBackLink = $wgUser->getSkin()->linkKnown( $this->mTitle );
3015                 $wgOut->setSubtitle( wfMsgHtml( 'delete-backlink', $deleteBackLink ) );
3016                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
3017                 $wgOut->addWikiMsg( 'confirmdeletetext' );
3018
3019                 wfRunHooks( 'ArticleConfirmDelete', array( $this, $wgOut, &$reason ) );
3020
3021                 if ( $wgUser->isAllowed( 'suppressrevision' ) ) {
3022                         $suppress = "<tr id=\"wpDeleteSuppressRow\" name=\"wpDeleteSuppressRow\">
3023                                         <td></td>
3024                                         <td class='mw-input'><strong>" .
3025                                                 Xml::checkLabel( wfMsg( 'revdelete-suppress' ),
3026                                                         'wpSuppress', 'wpSuppress', false, array( 'tabindex' => '4' ) ) .
3027                                         "</strong></td>
3028                                 </tr>";
3029                 } else {
3030                         $suppress = '';
3031                 }
3032                 $checkWatch = $wgUser->getBoolOption( 'watchdeletion' ) || $this->mTitle->userIsWatching();
3033
3034                 $form = Xml::openElement( 'form', array( 'method' => 'post',
3035                         'action' => $this->mTitle->getLocalURL( 'action=delete' ), 'id' => 'deleteconfirm' ) ) .
3036                         Xml::openElement( 'fieldset', array( 'id' => 'mw-delete-table' ) ) .
3037                         Xml::tags( 'legend', null, wfMsgExt( 'delete-legend', array( 'parsemag', 'escapenoentities' ) ) ) .
3038                         Xml::openElement( 'table', array( 'id' => 'mw-deleteconfirm-table' ) ) .
3039                         "<tr id=\"wpDeleteReasonListRow\">
3040                                 <td class='mw-label'>" .
3041                                         Xml::label( wfMsg( 'deletecomment' ), 'wpDeleteReasonList' ) .
3042                                 "</td>
3043                                 <td class='mw-input'>" .
3044                                         Xml::listDropDown( 'wpDeleteReasonList',
3045                                                 wfMsgForContent( 'deletereason-dropdown' ),
3046                                                 wfMsgForContent( 'deletereasonotherlist' ), '', 'wpReasonDropDown', 1 ) .
3047                                 "</td>
3048                         </tr>
3049                         <tr id=\"wpDeleteReasonRow\">
3050                                 <td class='mw-label'>" .
3051                                         Xml::label( wfMsg( 'deleteotherreason' ), 'wpReason' ) .
3052                                 "</td>
3053                                 <td class='mw-input'>" .
3054                                 Html::input( 'wpReason', $reason, 'text', array(
3055                                         'size' => '60',
3056                                         'maxlength' => '255',
3057                                         'tabindex' => '2',
3058                                         'id' => 'wpReason',
3059                                         'autofocus'
3060                                 ) ) .
3061                                 "</td>
3062                         </tr>";
3063
3064                 # Disallow watching if user is not logged in
3065                 if ( $wgUser->isLoggedIn() ) {
3066                         $form .= "
3067                         <tr>
3068                                 <td></td>
3069                                 <td class='mw-input'>" .
3070                                         Xml::checkLabel( wfMsg( 'watchthis' ),
3071                                                 'wpWatch', 'wpWatch', $checkWatch, array( 'tabindex' => '3' ) ) .
3072                                 "</td>
3073                         </tr>";
3074                 }
3075
3076                 $form .= "
3077                         $suppress
3078                         <tr>
3079                                 <td></td>
3080                                 <td class='mw-submit'>" .
3081                                         Xml::submitButton( wfMsg( 'deletepage' ),
3082                                                 array( 'name' => 'wpConfirmB', 'id' => 'wpConfirmB', 'tabindex' => '5' ) ) .
3083                                 "</td>
3084                         </tr>" .
3085                         Xml::closeElement( 'table' ) .
3086                         Xml::closeElement( 'fieldset' ) .
3087                         Xml::hidden( 'wpEditToken', $wgUser->editToken() ) .
3088                         Xml::closeElement( 'form' );
3089
3090                         if ( $wgUser->isAllowed( 'editinterface' ) ) {
3091                                 $skin = $wgUser->getSkin();
3092                                 $title = Title::makeTitle( NS_MEDIAWIKI, 'Deletereason-dropdown' );
3093                                 $link = $skin->link(
3094                                         $title,
3095                                         wfMsgHtml( 'delete-edit-reasonlist' ),
3096                                         array(),
3097                                         array( 'action' => 'edit' )
3098                                 );
3099                                 $form .= '<p class="mw-delete-editreasons">' . $link . '</p>';
3100                         }
3101
3102                 $wgOut->addHTML( $form );
3103                 $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
3104                 LogEventsList::showLogExtract( $wgOut, 'delete',
3105                         $this->mTitle->getPrefixedText()
3106                 );
3107         }
3108
3109         /**
3110          * Perform a deletion and output success or failure messages
3111          */
3112         public function doDelete( $reason, $suppress = false ) {
3113                 global $wgOut, $wgUser;
3114
3115                 $id = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
3116
3117                 $error = '';
3118                 if ( wfRunHooks( 'ArticleDelete', array( &$this, &$wgUser, &$reason, &$error ) ) ) {
3119                         if ( $this->doDeleteArticle( $reason, $suppress, $id ) ) {
3120                                 $deleted = $this->mTitle->getPrefixedText();
3121
3122                                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
3123                                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
3124
3125                                 $loglink = '[[Special:Log/delete|' . wfMsgNoTrans( 'deletionlog' ) . ']]';
3126
3127                                 $wgOut->addWikiMsg( 'deletedtext', $deleted, $loglink );
3128                                 $wgOut->returnToMain( false );
3129                                 wfRunHooks( 'ArticleDeleteComplete', array( &$this, &$wgUser, $reason, $id ) );
3130                         }
3131                 } else {
3132                         if ( $error == '' ) {
3133                                 $wgOut->showFatalError(
3134                                         Html::rawElement(
3135                                                 'div',
3136                                                 array( 'class' => 'error mw-error-cannotdelete' ),
3137                                                 wfMsgExt( 'cannotdelete', array( 'parse' ), $this->mTitle->getPrefixedText() )
3138                                         )
3139                                 );
3140
3141                                 $wgOut->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
3142
3143                                 LogEventsList::showLogExtract(
3144                                         $wgOut,
3145                                         'delete',
3146                                         $this->mTitle->getPrefixedText()
3147                                 );
3148                         } else {
3149                                 $wgOut->showFatalError( $error );
3150                         }
3151                 }
3152         }
3153
3154         /**
3155          * Back-end article deletion
3156          * Deletes the article with database consistency, writes logs, purges caches
3157          *
3158          * @param $reason string delete reason for deletion log
3159          * @param suppress bitfield
3160          *      Revision::DELETED_TEXT
3161          *      Revision::DELETED_COMMENT
3162          *      Revision::DELETED_USER
3163          *      Revision::DELETED_RESTRICTED
3164          * @param $id int article ID
3165          * @param $commit boolean defaults to true, triggers transaction end
3166          * @return boolean true if successful
3167          */
3168         public function doDeleteArticle( $reason, $suppress = false, $id = 0, $commit = true ) {
3169                 global $wgUseSquid, $wgDeferredUpdateList;
3170                 global $wgUseTrackbacks;
3171
3172                 wfDebug( __METHOD__ . "\n" );
3173
3174                 $dbw = wfGetDB( DB_MASTER );
3175                 $ns = $this->mTitle->getNamespace();
3176                 $t = $this->mTitle->getDBkey();
3177                 $id = $id ? $id : $this->mTitle->getArticleID( GAID_FOR_UPDATE );
3178
3179                 if ( $t === '' || $id == 0 ) {
3180                         return false;
3181                 }
3182
3183                 $u = new SiteStatsUpdate( 0, 1, - (int)$this->isCountable( $this->getRawText() ), -1 );
3184                 array_push( $wgDeferredUpdateList, $u );
3185
3186                 // Bitfields to further suppress the content
3187                 if ( $suppress ) {
3188                         $bitfield = 0;
3189                         // This should be 15...
3190                         $bitfield |= Revision::DELETED_TEXT;
3191                         $bitfield |= Revision::DELETED_COMMENT;
3192                         $bitfield |= Revision::DELETED_USER;
3193                         $bitfield |= Revision::DELETED_RESTRICTED;
3194                 } else {
3195                         $bitfield = 'rev_deleted';
3196                 }
3197
3198                 $dbw->begin();
3199                 // For now, shunt the revision data into the archive table.
3200                 // Text is *not* removed from the text table; bulk storage
3201                 // is left intact to avoid breaking block-compression or
3202                 // immutable storage schemes.
3203                 //
3204                 // For backwards compatibility, note that some older archive
3205                 // table entries will have ar_text and ar_flags fields still.
3206                 //
3207                 // In the future, we may keep revisions and mark them with
3208                 // the rev_deleted field, which is reserved for this purpose.
3209                 $dbw->insertSelect( 'archive', array( 'page', 'revision' ),
3210                         array(
3211                                 'ar_namespace'  => 'page_namespace',
3212                                 'ar_title'      => 'page_title',
3213                                 'ar_comment'    => 'rev_comment',
3214                                 'ar_user'       => 'rev_user',
3215                                 'ar_user_text'  => 'rev_user_text',
3216                                 'ar_timestamp'  => 'rev_timestamp',
3217                                 'ar_minor_edit' => 'rev_minor_edit',
3218                                 'ar_rev_id'     => 'rev_id',
3219                                 'ar_text_id'    => 'rev_text_id',
3220                                 'ar_text'       => '\'\'', // Be explicit to appease
3221                                 'ar_flags'      => '\'\'', // MySQL's "strict mode"...
3222                                 'ar_len'        => 'rev_len',
3223                                 'ar_page_id'    => 'page_id',
3224                                 'ar_deleted'    => $bitfield
3225                         ), array(
3226                                 'page_id' => $id,
3227                                 'page_id = rev_page'
3228                         ), __METHOD__
3229                 );
3230
3231                 # Delete restrictions for it
3232                 $dbw->delete( 'page_restrictions', array ( 'pr_page' => $id ), __METHOD__ );
3233
3234                 # Now that it's safely backed up, delete it
3235                 $dbw->delete( 'page', array( 'page_id' => $id ), __METHOD__ );
3236                 $ok = ( $dbw->affectedRows() > 0 ); // getArticleId() uses slave, could be laggy
3237
3238                 if ( !$ok ) {
3239                         $dbw->rollback();
3240                         return false;
3241                 }
3242
3243                 # Fix category table counts
3244                 $cats = array();
3245                 $res = $dbw->select( 'categorylinks', 'cl_to', array( 'cl_from' => $id ), __METHOD__ );
3246
3247                 foreach ( $res as $row ) {
3248                         $cats [] = $row->cl_to;
3249                 }
3250
3251                 $this->updateCategoryCounts( array(), $cats );
3252
3253                 # If using cascading deletes, we can skip some explicit deletes
3254                 if ( !$dbw->cascadingDeletes() ) {
3255                         $dbw->delete( 'revision', array( 'rev_page' => $id ), __METHOD__ );
3256
3257                         if ( $wgUseTrackbacks )
3258                                 $dbw->delete( 'trackbacks', array( 'tb_page' => $id ), __METHOD__ );
3259
3260                         # Delete outgoing links
3261                         $dbw->delete( 'pagelinks', array( 'pl_from' => $id ) );
3262                         $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
3263                         $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
3264                         $dbw->delete( 'templatelinks', array( 'tl_from' => $id ) );
3265                         $dbw->delete( 'externallinks', array( 'el_from' => $id ) );
3266                         $dbw->delete( 'langlinks', array( 'll_from' => $id ) );
3267                         $dbw->delete( 'redirect', array( 'rd_from' => $id ) );
3268                 }
3269
3270                 # If using cleanup triggers, we can skip some manual deletes
3271                 if ( !$dbw->cleanupTriggers() ) {
3272                         # Clean up recentchanges entries...
3273                         $dbw->delete( 'recentchanges',
3274                                 array( 'rc_type != ' . RC_LOG,
3275                                         'rc_namespace' => $this->mTitle->getNamespace(),
3276                                         'rc_title' => $this->mTitle->getDBkey() ),
3277                                 __METHOD__ );
3278                         $dbw->delete( 'recentchanges',
3279                                 array( 'rc_type != ' . RC_LOG, 'rc_cur_id' => $id ),
3280                                 __METHOD__ );
3281                 }
3282
3283                 # Clear caches
3284                 Article::onArticleDelete( $this->mTitle );
3285
3286                 # Clear the cached article id so the interface doesn't act like we exist
3287                 $this->mTitle->resetArticleID( 0 );
3288
3289                 # Log the deletion, if the page was suppressed, log it at Oversight instead
3290                 $logtype = $suppress ? 'suppress' : 'delete';
3291                 $log = new LogPage( $logtype );
3292
3293                 # Make sure logging got through
3294                 $log->addEntry( 'delete', $this->mTitle, $reason, array() );
3295
3296                 if ( $commit ) {
3297                         $dbw->commit();
3298                 }
3299
3300                 return true;
3301         }
3302
3303         /**
3304          * Roll back the most recent consecutive set of edits to a page
3305          * from the same user; fails if there are no eligible edits to
3306          * roll back to, e.g. user is the sole contributor. This function
3307          * performs permissions checks on $wgUser, then calls commitRollback()
3308          * to do the dirty work
3309          *
3310          * @param $fromP String: Name of the user whose edits to rollback.
3311          * @param $summary String: Custom summary. Set to default summary if empty.
3312          * @param $token String: Rollback token.
3313          * @param $bot Boolean: If true, mark all reverted edits as bot.
3314          *
3315          * @param $resultDetails Array: contains result-specific array of additional values
3316          *    'alreadyrolled' : 'current' (rev)
3317          *    success        : 'summary' (str), 'current' (rev), 'target' (rev)
3318          *
3319          * @return array of errors, each error formatted as
3320          *   array(messagekey, param1, param2, ...).
3321          * On success, the array is empty.  This array can also be passed to
3322          * OutputPage::showPermissionsErrorPage().
3323          */
3324         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails ) {
3325                 global $wgUser;
3326
3327                 $resultDetails = null;
3328
3329                 # Check permissions
3330                 $editErrors = $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser );
3331                 $rollbackErrors = $this->mTitle->getUserPermissionsErrors( 'rollback', $wgUser );
3332                 $errors = array_merge( $editErrors, wfArrayDiff2( $rollbackErrors, $editErrors ) );
3333
3334                 if ( !$wgUser->matchEditToken( $token, array( $this->mTitle->getPrefixedText(), $fromP ) ) ) {
3335                         $errors[] = array( 'sessionfailure' );
3336                 }
3337
3338                 if ( $wgUser->pingLimiter( 'rollback' ) || $wgUser->pingLimiter() ) {
3339                         $errors[] = array( 'actionthrottledtext' );
3340                 }
3341
3342                 # If there were errors, bail out now
3343                 if ( !empty( $errors ) ) {
3344                         return $errors;
3345                 }
3346
3347                 return $this->commitRollback( $fromP, $summary, $bot, $resultDetails );
3348         }
3349
3350         /**
3351          * Backend implementation of doRollback(), please refer there for parameter
3352          * and return value documentation
3353          *
3354          * NOTE: This function does NOT check ANY permissions, it just commits the
3355          * rollback to the DB Therefore, you should only call this function direct-
3356          * ly if you want to use custom permissions checks. If you don't, use
3357          * doRollback() instead.
3358          */
3359         public function commitRollback( $fromP, $summary, $bot, &$resultDetails ) {
3360                 global $wgUseRCPatrol, $wgUser, $wgLang;
3361
3362                 $dbw = wfGetDB( DB_MASTER );
3363
3364                 if ( wfReadOnly() ) {
3365                         return array( array( 'readonlytext' ) );
3366                 }
3367
3368                 # Get the last editor
3369                 $current = Revision::newFromTitle( $this->mTitle );
3370                 if ( is_null( $current ) ) {
3371                         # Something wrong... no page?
3372                         return array( array( 'notanarticle' ) );
3373                 }
3374
3375                 $from = str_replace( '_', ' ', $fromP );
3376                 # User name given should match up with the top revision.
3377                 # If the user was deleted then $from should be empty.
3378                 if ( $from != $current->getUserText() ) {
3379                         $resultDetails = array( 'current' => $current );
3380                         return array( array( 'alreadyrolled',
3381                                 htmlspecialchars( $this->mTitle->getPrefixedText() ),
3382                                 htmlspecialchars( $fromP ),
3383                                 htmlspecialchars( $current->getUserText() )
3384                         ) );
3385                 }
3386
3387                 # Get the last edit not by this guy...
3388                 # Note: these may not be public values
3389                 $user = intval( $current->getRawUser() );
3390                 $user_text = $dbw->addQuotes( $current->getRawUserText() );
3391                 $s = $dbw->selectRow( 'revision',
3392                         array( 'rev_id', 'rev_timestamp', 'rev_deleted' ),
3393                         array( 'rev_page' => $current->getPage(),
3394                                 "rev_user != {$user} OR rev_user_text != {$user_text}"
3395                         ), __METHOD__,
3396                         array( 'USE INDEX' => 'page_timestamp',
3397                                 'ORDER BY' => 'rev_timestamp DESC' )
3398                         );
3399                 if ( $s === false ) {
3400                         # No one else ever edited this page
3401                         return array( array( 'cantrollback' ) );
3402                 } else if ( $s->rev_deleted & REVISION::DELETED_TEXT || $s->rev_deleted & REVISION::DELETED_USER ) {
3403                         # Only admins can see this text
3404                         return array( array( 'notvisiblerev' ) );
3405                 }
3406
3407                 $set = array();
3408                 if ( $bot && $wgUser->isAllowed( 'markbotedits' ) ) {
3409                         # Mark all reverted edits as bot
3410                         $set['rc_bot'] = 1;
3411                 }
3412
3413                 if ( $wgUseRCPatrol ) {
3414                         # Mark all reverted edits as patrolled
3415                         $set['rc_patrolled'] = 1;
3416                 }
3417
3418                 if ( count( $set ) ) {
3419                         $dbw->update( 'recentchanges', $set,
3420                                 array( /* WHERE */
3421                                         'rc_cur_id' => $current->getPage(),
3422                                         'rc_user_text' => $current->getUserText(),
3423                                         "rc_timestamp > '{$s->rev_timestamp}'",
3424                                 ), __METHOD__
3425                         );
3426                 }
3427
3428                 # Generate the edit summary if necessary
3429                 $target = Revision::newFromId( $s->rev_id );
3430                 if ( empty( $summary ) ) {
3431                         if ( $from == '' ) { // no public user name
3432                                 $summary = wfMsgForContent( 'revertpage-nouser' );
3433                         } else {
3434                                 $summary = wfMsgForContent( 'revertpage' );
3435                         }
3436                 }
3437
3438                 # Allow the custom summary to use the same args as the default message
3439                 $args = array(
3440                         $target->getUserText(), $from, $s->rev_id,
3441                         $wgLang->timeanddate( wfTimestamp( TS_MW, $s->rev_timestamp ), true ),
3442                         $current->getId(), $wgLang->timeanddate( $current->getTimestamp() )
3443                 );
3444                 $summary = wfMsgReplaceArgs( $summary, $args );
3445
3446                 # Save
3447                 $flags = EDIT_UPDATE;
3448
3449                 if ( $wgUser->isAllowed( 'minoredit' ) ) {
3450                         $flags |= EDIT_MINOR;
3451                 }
3452
3453                 if ( $bot && ( $wgUser->isAllowed( 'markbotedits' ) || $wgUser->isAllowed( 'bot' ) ) ) {
3454                         $flags |= EDIT_FORCE_BOT;
3455                 }
3456
3457                 # Actually store the edit
3458                 $status = $this->doEdit( $target->getText(), $summary, $flags, $target->getId() );
3459                 if ( !empty( $status->value['revision'] ) ) {
3460                         $revId = $status->value['revision']->getId();
3461                 } else {
3462                         $revId = false;
3463                 }
3464
3465                 wfRunHooks( 'ArticleRollbackComplete', array( $this, $wgUser, $target, $current ) );
3466
3467                 $resultDetails = array(
3468                         'summary' => $summary,
3469                         'current' => $current,
3470                         'target'  => $target,
3471                         'newid'   => $revId
3472                 );
3473
3474                 return array();
3475         }
3476
3477         /**
3478          * User interface for rollback operations
3479          */
3480         public function rollback() {
3481                 global $wgUser, $wgOut, $wgRequest, $wgUseRCPatrol;
3482
3483                 $details = null;
3484
3485                 $result = $this->doRollback(
3486                         $wgRequest->getVal( 'from' ),
3487                         $wgRequest->getText( 'summary' ),
3488                         $wgRequest->getVal( 'token' ),
3489                         $wgRequest->getBool( 'bot' ),
3490                         $details
3491                 );
3492
3493                 if ( in_array( array( 'actionthrottledtext' ), $result ) ) {
3494                         $wgOut->rateLimited();
3495                         return;
3496                 }
3497
3498                 if ( isset( $result[0][0] ) && ( $result[0][0] == 'alreadyrolled' || $result[0][0] == 'cantrollback' ) ) {
3499                         $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
3500                         $errArray = $result[0];
3501                         $errMsg = array_shift( $errArray );
3502                         $wgOut->addWikiMsgArray( $errMsg, $errArray );
3503
3504                         if ( isset( $details['current'] ) ) {
3505                                 $current = $details['current'];
3506
3507                                 if ( $current->getComment() != '' ) {
3508                                         $wgOut->addWikiMsgArray( 'editcomment', array(
3509                                                 $wgUser->getSkin()->formatComment( $current->getComment() ) ), array( 'replaceafter' ) );
3510                                 }
3511                         }
3512
3513                         return;
3514                 }
3515
3516                 # Display permissions errors before read-only message -- there's no
3517                 # point in misleading the user into thinking the inability to rollback
3518                 # is only temporary.
3519                 if ( !empty( $result ) && $result !== array( array( 'readonlytext' ) ) ) {
3520                         # array_diff is completely broken for arrays of arrays, sigh.
3521                         # Remove any 'readonlytext' error manually.
3522                         $out = array();
3523                         foreach ( $result as $error ) {
3524                                 if ( $error != array( 'readonlytext' ) ) {
3525                                         $out [] = $error;
3526                                 }
3527                         }
3528                         $wgOut->showPermissionsErrorPage( $out );
3529
3530                         return;
3531                 }
3532
3533                 if ( $result == array( array( 'readonlytext' ) ) ) {
3534                         $wgOut->readOnlyPage();
3535
3536                         return;
3537                 }
3538
3539                 $current = $details['current'];
3540                 $target = $details['target'];
3541                 $newId = $details['newid'];
3542                 $wgOut->setPageTitle( wfMsg( 'actioncomplete' ) );
3543                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
3544
3545                 if ( $current->getUserText() === '' ) {
3546                         $old = wfMsg( 'rev-deleted-user' );
3547                 } else {
3548                         $old = $wgUser->getSkin()->userLink( $current->getUser(), $current->getUserText() )
3549                                 . $wgUser->getSkin()->userToolLinks( $current->getUser(), $current->getUserText() );
3550                 }
3551
3552                 $new = $wgUser->getSkin()->userLink( $target->getUser(), $target->getUserText() )
3553                         . $wgUser->getSkin()->userToolLinks( $target->getUser(), $target->getUserText() );
3554                 $wgOut->addHTML( wfMsgExt( 'rollback-success', array( 'parse', 'replaceafter' ), $old, $new ) );
3555                 $wgOut->returnToMain( false, $this->mTitle );
3556
3557                 if ( !$wgRequest->getBool( 'hidediff', false ) && !$wgUser->getBoolOption( 'norollbackdiff', false ) ) {
3558                         $de = new DifferenceEngine( $this->mTitle, $current->getId(), $newId, false, true );
3559                         $de->showDiff( '', '' );
3560                 }
3561         }
3562
3563         /**
3564          * Do standard deferred updates after page view
3565          */
3566         public function viewUpdates() {
3567                 global $wgDeferredUpdateList, $wgDisableCounters, $wgUser;
3568                 if ( wfReadOnly() ) {
3569                         return;
3570                 }
3571
3572                 # Don't update page view counters on views from bot users (bug 14044)
3573                 if ( !$wgDisableCounters && !$wgUser->isAllowed( 'bot' ) && $this->getID() ) {
3574                         Article::incViewCount( $this->getID() );
3575                         $u = new SiteStatsUpdate( 1, 0, 0 );
3576                         array_push( $wgDeferredUpdateList, $u );
3577                 }
3578
3579                 # Update newtalk / watchlist notification status
3580                 $wgUser->clearNotification( $this->mTitle );
3581         }
3582
3583         /**
3584          * Prepare text which is about to be saved.
3585          * Returns a stdclass with source, pst and output members
3586          */
3587         public function prepareTextForEdit( $text, $revid = null ) {
3588                 if ( $this->mPreparedEdit && $this->mPreparedEdit->newText == $text && $this->mPreparedEdit->revid == $revid ) {
3589                         // Already prepared
3590                         return $this->mPreparedEdit;
3591                 }
3592
3593                 global $wgParser;
3594
3595                 $edit = (object)array();
3596                 $edit->revid = $revid;
3597                 $edit->newText = $text;
3598                 $edit->pst = $this->preSaveTransform( $text );
3599                 $options = $this->getParserOptions();
3600                 $edit->output = $wgParser->parse( $edit->pst, $this->mTitle, $options, true, true, $revid );
3601                 $edit->oldText = $this->getContent();
3602
3603                 $this->mPreparedEdit = $edit;
3604
3605                 return $edit;
3606         }
3607
3608         /**
3609          * Do standard deferred updates after page edit.
3610          * Update links tables, site stats, search index and message cache.
3611          * Purges pages that include this page if the text was changed here.
3612          * Every 100th edit, prune the recent changes table.
3613          *
3614          * @private
3615          * @param $text New text of the article
3616          * @param $summary Edit summary
3617          * @param $minoredit Minor edit
3618          * @param $timestamp_of_pagechange Timestamp associated with the page change
3619          * @param $newid rev_id value of the new revision
3620          * @param $changed Whether or not the content actually changed
3621          */
3622         public function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange, $newid, $changed = true ) {
3623                 global $wgDeferredUpdateList, $wgMessageCache, $wgUser, $wgEnableParserCache;
3624
3625                 wfProfileIn( __METHOD__ );
3626
3627                 # Parse the text
3628                 # Be careful not to double-PST: $text is usually already PST-ed once
3629                 if ( !$this->mPreparedEdit || $this->mPreparedEdit->output->getFlag( 'vary-revision' ) ) {
3630                         wfDebug( __METHOD__ . ": No prepared edit or vary-revision is set...\n" );
3631                         $editInfo = $this->prepareTextForEdit( $text, $newid );
3632                 } else {
3633                         wfDebug( __METHOD__ . ": No vary-revision, using prepared edit...\n" );
3634                         $editInfo = $this->mPreparedEdit;
3635                 }
3636
3637                 # Save it to the parser cache
3638                 if ( $wgEnableParserCache ) {
3639                         $popts = $this->getParserOptions();
3640                         $parserCache = ParserCache::singleton();
3641                         $parserCache->save( $editInfo->output, $this, $popts );
3642                 }
3643
3644                 # Update the links tables
3645                 $u = new LinksUpdate( $this->mTitle, $editInfo->output );
3646                 $u->doUpdate();
3647
3648                 wfRunHooks( 'ArticleEditUpdates', array( &$this, &$editInfo, $changed ) );
3649
3650                 if ( wfRunHooks( 'ArticleEditUpdatesDeleteFromRecentchanges', array( &$this ) ) ) {
3651                         if ( 0 == mt_rand( 0, 99 ) ) {
3652                                 // Flush old entries from the `recentchanges` table; we do this on
3653                                 // random requests so as to avoid an increase in writes for no good reason
3654                                 global $wgRCMaxAge;
3655
3656                                 $dbw = wfGetDB( DB_MASTER );
3657                                 $cutoff = $dbw->timestamp( time() - $wgRCMaxAge );
3658                                 $recentchanges = $dbw->tableName( 'recentchanges' );
3659                                 $sql = "DELETE FROM $recentchanges WHERE rc_timestamp < '{$cutoff}'";
3660
3661                                 $dbw->query( $sql );
3662                         }
3663                 }
3664
3665                 $id = $this->getID();
3666                 $title = $this->mTitle->getPrefixedDBkey();
3667                 $shortTitle = $this->mTitle->getDBkey();
3668
3669                 if ( 0 == $id ) {
3670                         wfProfileOut( __METHOD__ );
3671                         return;
3672                 }
3673
3674                 $u = new SiteStatsUpdate( 0, 1, $this->mGoodAdjustment, $this->mTotalAdjustment );
3675                 array_push( $wgDeferredUpdateList, $u );
3676                 $u = new SearchUpdate( $id, $title, $text );
3677                 array_push( $wgDeferredUpdateList, $u );
3678
3679                 # If this is another user's talk page, update newtalk
3680                 # Don't do this if $changed = false otherwise some idiot can null-edit a
3681                 # load of user talk pages and piss people off, nor if it's a minor edit
3682                 # by a properly-flagged bot.
3683                 if ( $this->mTitle->getNamespace() == NS_USER_TALK && $shortTitle != $wgUser->getTitleKey() && $changed
3684                         && !( $minoredit && $wgUser->isAllowed( 'nominornewtalk' ) )
3685                 ) {
3686                         if ( wfRunHooks( 'ArticleEditUpdateNewTalk', array( &$this ) ) ) {
3687                                 $other = User::newFromName( $shortTitle, false );
3688                                 if ( !$other ) {
3689                                         wfDebug( __METHOD__ . ": invalid username\n" );
3690                                 } elseif ( User::isIP( $shortTitle ) ) {
3691                                         // An anonymous user
3692                                         $other->setNewtalk( true );
3693                                 } elseif ( $other->isLoggedIn() ) {
3694                                         $other->setNewtalk( true );
3695                                 } else {
3696                                         wfDebug( __METHOD__ . ": don't need to notify a nonexistent user\n" );
3697                                 }
3698                         }
3699                 }
3700
3701                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
3702                         $wgMessageCache->replace( $shortTitle, $text );
3703                 }
3704
3705                 wfProfileOut( __METHOD__ );
3706         }
3707
3708         /**
3709          * Perform article updates on a special page creation.
3710          *
3711          * @param $rev Revision object
3712          *
3713          * @todo This is a shitty interface function. Kill it and replace the
3714          * other shitty functions like editUpdates and such so it's not needed
3715          * anymore.
3716          */
3717         public function createUpdates( $rev ) {
3718                 $this->mGoodAdjustment = $this->isCountable( $rev->getText() );
3719                 $this->mTotalAdjustment = 1;
3720                 $this->editUpdates( $rev->getText(), $rev->getComment(),
3721                         $rev->isMinor(), wfTimestamp(), $rev->getId(), true );
3722         }
3723
3724         /**
3725          * Generate the navigation links when browsing through an article revisions
3726          * It shows the information as:
3727          *   Revision as of \<date\>; view current revision
3728          *   \<- Previous version | Next Version -\>
3729          *
3730          * @param $oldid String: revision ID of this article revision
3731          */
3732         public function setOldSubtitle( $oldid = 0 ) {
3733                 global $wgLang, $wgOut, $wgUser, $wgRequest;
3734
3735                 if ( !wfRunHooks( 'DisplayOldSubtitle', array( &$this, &$oldid ) ) ) {
3736                         return;
3737                 }
3738
3739                 $unhide = $wgRequest->getInt( 'unhide' ) == 1;
3740
3741                 # Cascade unhide param in links for easy deletion browsing
3742                 $extraParams = array();
3743                 if ( $wgRequest->getVal( 'unhide' ) ) {
3744                         $extraParams['unhide'] = 1;
3745                 }
3746
3747                 $revision = Revision::newFromId( $oldid );
3748
3749                 $current = ( $oldid == $this->mLatest );
3750                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
3751                 $tddate = $wgLang->date( $this->mTimestamp, true );
3752                 $tdtime = $wgLang->time( $this->mTimestamp, true );
3753                 $sk = $wgUser->getSkin();
3754                 $lnk = $current
3755                         ? wfMsgHtml( 'currentrevisionlink' )
3756                         : $sk->link(
3757                                 $this->mTitle,
3758                                 wfMsgHtml( 'currentrevisionlink' ),
3759                                 array(),
3760                                 $extraParams,
3761                                 array( 'known', 'noclasses' )
3762                         );
3763                 $curdiff = $current
3764                         ? wfMsgHtml( 'diff' )
3765                         : $sk->link(
3766                                 $this->mTitle,
3767                                 wfMsgHtml( 'diff' ),
3768                                 array(),
3769                                 array(
3770                                         'diff' => 'cur',
3771                                         'oldid' => $oldid
3772                                 ) + $extraParams,
3773                                 array( 'known', 'noclasses' )
3774                         );
3775                 $prev = $this->mTitle->getPreviousRevisionID( $oldid ) ;
3776                 $prevlink = $prev
3777                         ? $sk->link(
3778                                 $this->mTitle,
3779                                 wfMsgHtml( 'previousrevision' ),
3780                                 array(),
3781                                 array(
3782                                         'direction' => 'prev',
3783                                         'oldid' => $oldid
3784                                 ) + $extraParams,
3785                                 array( 'known', 'noclasses' )
3786                         )
3787                         : wfMsgHtml( 'previousrevision' );
3788                 $prevdiff = $prev
3789                         ? $sk->link(
3790                                 $this->mTitle,
3791                                 wfMsgHtml( 'diff' ),
3792                                 array(),
3793                                 array(
3794                                         'diff' => 'prev',
3795                                         'oldid' => $oldid
3796                                 ) + $extraParams,
3797                                 array( 'known', 'noclasses' )
3798                         )
3799                         : wfMsgHtml( 'diff' );
3800                 $nextlink = $current
3801                         ? wfMsgHtml( 'nextrevision' )
3802                         : $sk->link(
3803                                 $this->mTitle,
3804                                 wfMsgHtml( 'nextrevision' ),
3805                                 array(),
3806                                 array(
3807                                         'direction' => 'next',
3808                                         'oldid' => $oldid
3809                                 ) + $extraParams,
3810                                 array( 'known', 'noclasses' )
3811                         );
3812                 $nextdiff = $current
3813                         ? wfMsgHtml( 'diff' )
3814                         : $sk->link(
3815                                 $this->mTitle,
3816                                 wfMsgHtml( 'diff' ),
3817                                 array(),
3818                                 array(
3819                                         'diff' => 'next',
3820                                         'oldid' => $oldid
3821                                 ) + $extraParams,
3822                                 array( 'known', 'noclasses' )
3823                         );
3824
3825                 $cdel = '';
3826
3827                 // User can delete revisions or view deleted revisions...
3828                 $canHide = $wgUser->isAllowed( 'deleterevision' );
3829                 if ( $canHide || ( $revision->getVisibility() && $wgUser->isAllowed( 'deletedhistory' ) ) ) {
3830                         if ( !$revision->userCan( Revision::DELETED_RESTRICTED ) ) {
3831                                 $cdel = $sk->revDeleteLinkDisabled( $canHide ); // rev was hidden from Sysops
3832                         } else {
3833                                 $query = array(
3834                                         'type'   => 'revision',
3835                                         'target' => $this->mTitle->getPrefixedDbkey(),
3836                                         'ids'    => $oldid
3837                                 );
3838                                 $cdel = $sk->revDeleteLink( $query, $revision->isDeleted( File::DELETED_RESTRICTED ), $canHide );
3839                         }
3840                         $cdel .= ' ';
3841                 }
3842
3843                 # Show user links if allowed to see them. If hidden, then show them only if requested...
3844                 $userlinks = $sk->revUserTools( $revision, !$unhide );
3845
3846                 $m = wfMsg( 'revision-info-current' );
3847                 $infomsg = $current && !wfEmptyMsg( 'revision-info-current', $m ) && $m != '-'
3848                         ? 'revision-info-current'
3849                         : 'revision-info';
3850
3851                 $r = "\n\t\t\t\t<div id=\"mw-{$infomsg}\">" .
3852                         wfMsgExt(
3853                                 $infomsg,
3854                                 array( 'parseinline', 'replaceafter' ),
3855                                 $td,
3856                                 $userlinks,
3857                                 $revision->getID(),
3858                                 $tddate,
3859                                 $tdtime,
3860                                 $revision->getUser()
3861                         ) .
3862                         "</div>\n" .
3863                         "\n\t\t\t\t<div id=\"mw-revision-nav\">" . $cdel . wfMsgExt( 'revision-nav', array( 'escapenoentities', 'parsemag', 'replaceafter' ),
3864                         $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff ) . "</div>\n\t\t\t";
3865
3866                 $wgOut->setSubtitle( $r );
3867         }
3868
3869         /**
3870          * This function is called right before saving the wikitext,
3871          * so we can do things like signatures and links-in-context.
3872          *
3873          * @param $text String article contents
3874          * @return string article contents with altered wikitext markup (signatures
3875          *      converted, {{subst:}}, templates, etc.)
3876          */
3877         public function preSaveTransform( $text ) {
3878                 global $wgParser, $wgUser;
3879
3880                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
3881         }
3882
3883         /* Caching functions */
3884
3885         /**
3886          * checkLastModified returns true if it has taken care of all
3887          * output to the client that is necessary for this request.
3888          * (that is, it has sent a cached version of the page)
3889          *
3890          * @return boolean true if cached version send, false otherwise
3891          */
3892         protected function tryFileCache() {
3893                 static $called = false;
3894
3895                 if ( $called ) {
3896                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
3897                         return false;
3898                 }
3899
3900                 $called = true;
3901                 if ( $this->isFileCacheable() ) {
3902                         $cache = new HTMLFileCache( $this->mTitle );
3903                         if ( $cache->isFileCacheGood( $this->mTouched ) ) {
3904                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
3905                                 $cache->loadFromFileCache();
3906                                 return true;
3907                         } else {
3908                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
3909                                 ob_start( array( &$cache, 'saveToFileCache' ) );
3910                         }
3911                 } else {
3912                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
3913                 }
3914
3915                 return false;
3916         }
3917
3918         /**
3919          * Check if the page can be cached
3920          * @return bool
3921          */
3922         public function isFileCacheable() {
3923                 $cacheable = false;
3924
3925                 if ( HTMLFileCache::useFileCache() ) {
3926                         $cacheable = $this->getID() && !$this->mRedirectedFrom;
3927                         // Extension may have reason to disable file caching on some pages.
3928                         if ( $cacheable ) {
3929                                 $cacheable = wfRunHooks( 'IsFileCacheable', array( &$this ) );
3930                         }
3931                 }
3932
3933                 return $cacheable;
3934         }
3935
3936         /**
3937          * Loads page_touched and returns a value indicating if it should be used
3938          * @return boolean true if not a redirect
3939          */
3940         public function checkTouched() {
3941                 if ( !$this->mDataLoaded ) {
3942                         $this->loadPageData();
3943                 }
3944
3945                 return !$this->mIsRedirect;
3946         }
3947
3948         /**
3949          * Get the page_touched field
3950          * @return string containing GMT timestamp
3951          */
3952         public function getTouched() {
3953                 if ( !$this->mDataLoaded ) {
3954                         $this->loadPageData();
3955                 }
3956
3957                 return $this->mTouched;
3958         }
3959
3960         /**
3961          * Get the page_latest field
3962          * @return integer rev_id of current revision
3963          */
3964         public function getLatest() {
3965                 if ( !$this->mDataLoaded ) {
3966                         $this->loadPageData();
3967                 }
3968
3969                 return (int)$this->mLatest;
3970         }
3971
3972         /**
3973          * Edit an article without doing all that other stuff
3974          * The article must already exist; link tables etc
3975          * are not updated, caches are not flushed.
3976          *
3977          * @param $text String: text submitted
3978          * @param $comment String: comment submitted
3979          * @param $minor Boolean: whereas it's a minor modification
3980          */
3981         public function quickEdit( $text, $comment = '', $minor = 0 ) {
3982                 wfProfileIn( __METHOD__ );
3983
3984                 $dbw = wfGetDB( DB_MASTER );
3985                 $revision = new Revision( array(
3986                         'page'       => $this->getId(),
3987                         'text'       => $text,
3988                         'comment'    => $comment,
3989                         'minor_edit' => $minor ? 1 : 0,
3990                         ) );
3991                 $revision->insertOn( $dbw );
3992                 $this->updateRevisionOn( $dbw, $revision );
3993
3994                 wfRunHooks( 'NewRevisionFromEditComplete', array( $this, $revision, false, $wgUser ) );
3995
3996                 wfProfileOut( __METHOD__ );
3997         }
3998
3999         /**
4000          * Used to increment the view counter
4001          *
4002          * @param $id Integer: article id
4003          */
4004         public static function incViewCount( $id ) {
4005                 $id = intval( $id );
4006
4007                 global $wgHitcounterUpdateFreq;
4008
4009                 $dbw = wfGetDB( DB_MASTER );
4010                 $pageTable = $dbw->tableName( 'page' );
4011                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
4012                 $acchitsTable = $dbw->tableName( 'acchits' );
4013                 $dbType = $dbw->getType();
4014
4015                 if ( $wgHitcounterUpdateFreq <= 1 || $dbType == 'sqlite' ) {
4016                         $dbw->query( "UPDATE $pageTable SET page_counter = page_counter + 1 WHERE page_id = $id" );
4017
4018                         return;
4019                 }
4020
4021                 # Not important enough to warrant an error page in case of failure
4022                 $oldignore = $dbw->ignoreErrors( true );
4023
4024                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
4025
4026                 $checkfreq = intval( $wgHitcounterUpdateFreq / 25 + 1 );
4027                 if ( ( rand() % $checkfreq != 0 ) or ( $dbw->lastErrno() != 0 ) ) {
4028                         # Most of the time (or on SQL errors), skip row count check
4029                         $dbw->ignoreErrors( $oldignore );
4030
4031                         return;
4032                 }
4033
4034                 $res = $dbw->query( "SELECT COUNT(*) as n FROM $hitcounterTable" );
4035                 $row = $dbw->fetchObject( $res );
4036                 $rown = intval( $row->n );
4037
4038                 if ( $rown >= $wgHitcounterUpdateFreq ) {
4039                         wfProfileIn( 'Article::incViewCount-collect' );
4040                         $old_user_abort = ignore_user_abort( true );
4041
4042                         $dbw->lockTables( array(), array( 'hitcounter' ), __METHOD__, false );
4043                         $tabletype = $dbType == 'mysql' ? "ENGINE=HEAP " : '';
4044                         $dbw->query( "CREATE TEMPORARY TABLE $acchitsTable $tabletype AS " .
4045                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable " .
4046                                 'GROUP BY hc_id', __METHOD__ );
4047                         $dbw->delete( 'hitcounter', '*', __METHOD__ );
4048                         $dbw->unlockTables( __METHOD__ );
4049
4050                         if ( $dbType == 'mysql' ) {
4051                                 $dbw->query( "UPDATE $pageTable,$acchitsTable SET page_counter=page_counter + hc_n " .
4052                                         'WHERE page_id = hc_id', __METHOD__ );
4053                         } else {
4054                                 $dbw->query( "UPDATE $pageTable SET page_counter=page_counter + hc_n " .
4055                                         "FROM $acchitsTable WHERE page_id = hc_id", __METHOD__ );
4056                         }
4057                         $dbw->query( "DROP TABLE $acchitsTable", __METHOD__ );
4058
4059                         ignore_user_abort( $old_user_abort );
4060                         wfProfileOut( 'Article::incViewCount-collect' );
4061                 }
4062
4063                 $dbw->ignoreErrors( $oldignore );
4064         }
4065
4066         /**#@+
4067          * The onArticle*() functions are supposed to be a kind of hooks
4068          * which should be called whenever any of the specified actions
4069          * are done.
4070          *
4071          * This is a good place to put code to clear caches, for instance.
4072          *
4073          * This is called on page move and undelete, as well as edit
4074          *
4075          * @param $title a title object
4076          */
4077         public static function onArticleCreate( $title ) {
4078                 # Update existence markers on article/talk tabs...
4079                 if ( $title->isTalkPage() ) {
4080                         $other = $title->getSubjectPage();
4081                 } else {
4082                         $other = $title->getTalkPage();
4083                 }
4084
4085                 $other->invalidateCache();
4086                 $other->purgeSquid();
4087
4088                 $title->touchLinks();
4089                 $title->purgeSquid();
4090                 $title->deleteTitleProtection();
4091         }
4092
4093         /**
4094          * Clears caches when article is deleted
4095          */
4096         public static function onArticleDelete( $title ) {
4097                 global $wgMessageCache;
4098
4099                 # Update existence markers on article/talk tabs...
4100                 if ( $title->isTalkPage() ) {
4101                         $other = $title->getSubjectPage();
4102                 } else {
4103                         $other = $title->getTalkPage();
4104                 }
4105
4106                 $other->invalidateCache();
4107                 $other->purgeSquid();
4108
4109                 $title->touchLinks();
4110                 $title->purgeSquid();
4111
4112                 # File cache
4113                 HTMLFileCache::clearFileCache( $title );
4114
4115                 # Messages
4116                 if ( $title->getNamespace() == NS_MEDIAWIKI ) {
4117                         $wgMessageCache->replace( $title->getDBkey(), false );
4118                 }
4119
4120                 # Images
4121                 if ( $title->getNamespace() == NS_FILE ) {
4122                         $update = new HTMLCacheUpdate( $title, 'imagelinks' );
4123                         $update->doUpdate();
4124                 }
4125
4126                 # User talk pages
4127                 if ( $title->getNamespace() == NS_USER_TALK ) {
4128                         $user = User::newFromName( $title->getText(), false );
4129                         $user->setNewtalk( false );
4130                 }
4131
4132                 # Image redirects
4133                 RepoGroup::singleton()->getLocalRepo()->invalidateImageRedirect( $title );
4134         }
4135
4136         /**
4137          * Purge caches on page update etc
4138          *
4139          * @param $title Title object
4140          * @todo:  verify that $title is always a Title object (and never false or null), add Title hint to parameter $title
4141          */
4142         public static function onArticleEdit( $title ) {
4143                 global $wgDeferredUpdateList;
4144
4145                 // Invalidate caches of articles which include this page
4146                 $wgDeferredUpdateList[] = new HTMLCacheUpdate( $title, 'templatelinks' );
4147
4148                 // Invalidate the caches of all pages which redirect here
4149                 $wgDeferredUpdateList[] = new HTMLCacheUpdate( $title, 'redirect' );
4150
4151                 # Purge squid for this page only
4152                 $title->purgeSquid();
4153
4154                 # Clear file cache for this page only
4155                 HTMLFileCache::clearFileCache( $title );
4156         }
4157
4158         /**#@-*/
4159
4160         /**
4161          * Overriden by ImagePage class, only present here to avoid a fatal error
4162          * Called for ?action=revert
4163          */
4164         public function revert() {
4165                 global $wgOut;
4166                 $wgOut->showErrorPage( 'nosuchaction', 'nosuchactiontext' );
4167         }
4168
4169         /**
4170          * Info about this page
4171          * Called for ?action=info when $wgAllowPageInfo is on.
4172          */
4173         public function info() {
4174                 global $wgLang, $wgOut, $wgAllowPageInfo, $wgUser;
4175
4176                 if ( !$wgAllowPageInfo ) {
4177                         $wgOut->showErrorPage( 'nosuchaction', 'nosuchactiontext' );
4178                         return;
4179                 }
4180
4181                 $page = $this->mTitle->getSubjectPage();
4182
4183                 $wgOut->setPagetitle( $page->getPrefixedText() );
4184                 $wgOut->setPageTitleActionText( wfMsg( 'info_short' ) );
4185                 $wgOut->setSubtitle( wfMsgHtml( 'infosubtitle' ) );
4186
4187                 if ( !$this->mTitle->exists() ) {
4188                         $wgOut->addHTML( '<div class="noarticletext">' );
4189                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
4190                                 // This doesn't quite make sense; the user is asking for
4191                                 // information about the _page_, not the message... -- RC
4192                                 $wgOut->addHTML( htmlspecialchars( wfMsgWeirdKey( $this->mTitle->getText() ) ) );
4193                         } else {
4194                                 $msg = $wgUser->isLoggedIn()
4195                                         ? 'noarticletext'
4196                                         : 'noarticletextanon';
4197                                 $wgOut->addHTML( wfMsgExt( $msg, 'parse' ) );
4198                         }
4199
4200                         $wgOut->addHTML( '</div>' );
4201                 } else {
4202                         $dbr = wfGetDB( DB_SLAVE );
4203                         $wl_clause = array(
4204                                 'wl_title'     => $page->getDBkey(),
4205                                 'wl_namespace' => $page->getNamespace() );
4206                         $numwatchers = $dbr->selectField(
4207                                 'watchlist',
4208                                 'COUNT(*)',
4209                                 $wl_clause,
4210                                 __METHOD__,
4211                                 $this->getSelectOptions() );
4212
4213                         $pageInfo = $this->pageCountInfo( $page );
4214                         $talkInfo = $this->pageCountInfo( $page->getTalkPage() );
4215
4216
4217                         //FIXME: unescaped messages
4218                         $wgOut->addHTML( "<ul><li>" . wfMsg( "numwatchers", $wgLang->formatNum( $numwatchers ) ) . '</li>' );
4219                         $wgOut->addHTML( "<li>" . wfMsg( 'numedits', $wgLang->formatNum( $pageInfo['edits'] ) ) . '</li>' );
4220
4221                         if ( $talkInfo ) {
4222                                 $wgOut->addHTML( '<li>' . wfMsg( "numtalkedits", $wgLang->formatNum( $talkInfo['edits'] ) ) . '</li>' );
4223                         }
4224
4225                         $wgOut->addHTML( '<li>' . wfMsg( "numauthors", $wgLang->formatNum( $pageInfo['authors'] ) ) . '</li>' );
4226
4227                         if ( $talkInfo ) {
4228                                 $wgOut->addHTML( '<li>' . wfMsg( 'numtalkauthors', $wgLang->formatNum( $talkInfo['authors'] ) ) . '</li>' );
4229                         }
4230
4231                         $wgOut->addHTML( '</ul>' );
4232                 }
4233         }
4234
4235         /**
4236          * Return the total number of edits and number of unique editors
4237          * on a given page. If page does not exist, returns false.
4238          *
4239          * @param $title Title object
4240          * @return mixed array or boolean false
4241          */
4242         public function pageCountInfo( $title ) {
4243                 $id = $title->getArticleId();
4244
4245                 if ( $id == 0 ) {
4246                         return false;
4247                 }
4248
4249                 $dbr = wfGetDB( DB_SLAVE );
4250                 $rev_clause = array( 'rev_page' => $id );
4251                 $edits = $dbr->selectField(
4252                         'revision',
4253                         'COUNT(rev_page)',
4254                         $rev_clause,
4255                         __METHOD__,
4256                         $this->getSelectOptions()
4257                 );
4258                 $authors = $dbr->selectField(
4259                         'revision',
4260                         'COUNT(DISTINCT rev_user_text)',
4261                         $rev_clause,
4262                         __METHOD__,
4263                         $this->getSelectOptions()
4264                 );
4265
4266                 return array( 'edits' => $edits, 'authors' => $authors );
4267         }
4268
4269         /**
4270          * Return a list of templates used by this article.
4271          * Uses the templatelinks table
4272          *
4273          * @return Array of Title objects
4274          */
4275         public function getUsedTemplates() {
4276                 $result = array();
4277                 $id = $this->mTitle->getArticleID();
4278
4279                 if ( $id == 0 ) {
4280                         return array();
4281                 }
4282
4283                 $dbr = wfGetDB( DB_SLAVE );
4284                 $res = $dbr->select( array( 'templatelinks' ),
4285                         array( 'tl_namespace', 'tl_title' ),
4286                         array( 'tl_from' => $id ),
4287                         __METHOD__ );
4288
4289                 if ( $res !== false ) {
4290                         foreach ( $res as $row ) {
4291                                 $result[] = Title::makeTitle( $row->tl_namespace, $row->tl_title );
4292                         }
4293                 }
4294
4295                 $dbr->freeResult( $res );
4296
4297                 return $result;
4298         }
4299
4300         /**
4301          * Returns a list of hidden categories this page is a member of.
4302          * Uses the page_props and categorylinks tables.
4303          *
4304          * @return Array of Title objects
4305          */
4306         public function getHiddenCategories() {
4307                 $result = array();
4308                 $id = $this->mTitle->getArticleID();
4309
4310                 if ( $id == 0 ) {
4311                         return array();
4312                 }
4313
4314                 $dbr = wfGetDB( DB_SLAVE );
4315                 $res = $dbr->select( array( 'categorylinks', 'page_props', 'page' ),
4316                         array( 'cl_to' ),
4317                         array( 'cl_from' => $id, 'pp_page=page_id', 'pp_propname' => 'hiddencat',
4318                                 'page_namespace' => NS_CATEGORY, 'page_title=cl_to' ),
4319                         __METHOD__ );
4320
4321                 if ( $res !== false ) {
4322                         foreach ( $res as $row ) {
4323                                 $result[] = Title::makeTitle( NS_CATEGORY, $row->cl_to );
4324                         }
4325                 }
4326
4327                 $dbr->freeResult( $res );
4328
4329                 return $result;
4330         }
4331
4332         /**
4333         * Return an applicable autosummary if one exists for the given edit.
4334         * @param $oldtext String: the previous text of the page.
4335         * @param $newtext String: The submitted text of the page.
4336         * @param $flags Bitmask: a bitmask of flags submitted for the edit.
4337         * @return string An appropriate autosummary, or an empty string.
4338         */
4339         public static function getAutosummary( $oldtext, $newtext, $flags ) {
4340                 # Decide what kind of autosummary is needed.
4341
4342                 # Redirect autosummaries
4343                 $ot = Title::newFromRedirect( $oldtext );
4344                 $rt = Title::newFromRedirect( $newtext );
4345
4346                 if ( is_object( $rt ) && ( !is_object( $ot ) || !$rt->equals( $ot ) || $ot->getFragment() != $rt->getFragment() ) ) {
4347                         return wfMsgForContent( 'autoredircomment', $rt->getFullText() );
4348                 }
4349
4350                 # New page autosummaries
4351                 if ( $flags & EDIT_NEW && strlen( $newtext ) ) {
4352                         # If they're making a new article, give its text, truncated, in the summary.
4353                         global $wgContLang;
4354
4355                         $truncatedtext = $wgContLang->truncate(
4356                                 str_replace( "\n", ' ', $newtext ),
4357                                 max( 0, 200 - strlen( wfMsgForContent( 'autosumm-new' ) ) ) );
4358
4359                         return wfMsgForContent( 'autosumm-new', $truncatedtext );
4360                 }
4361
4362                 # Blanking autosummaries
4363                 if ( $oldtext != '' && $newtext == '' ) {
4364                         return wfMsgForContent( 'autosumm-blank' );
4365                 } elseif ( strlen( $oldtext ) > 10 * strlen( $newtext ) && strlen( $newtext ) < 500 ) {
4366                         # Removing more than 90% of the article
4367                         global $wgContLang;
4368
4369                         $truncatedtext = $wgContLang->truncate(
4370                                 $newtext,
4371                                 max( 0, 200 - strlen( wfMsgForContent( 'autosumm-replace' ) ) ) );
4372
4373                         return wfMsgForContent( 'autosumm-replace', $truncatedtext );
4374                 }
4375
4376                 # If we reach this point, there's no applicable autosummary for our case, so our
4377                 # autosummary is empty.
4378                 return '';
4379         }
4380
4381         /**
4382          * Add the primary page-view wikitext to the output buffer
4383          * Saves the text into the parser cache if possible.
4384          * Updates templatelinks if it is out of date.
4385          *
4386          * @param $text String
4387          * @param $cache Boolean
4388          * @param $parserOptions mixed ParserOptions object, or boolean false
4389          */
4390         public function outputWikiText( $text, $cache = true, $parserOptions = false ) {
4391                 global $wgOut;
4392
4393                 $this->mParserOutput = $this->getOutputFromWikitext( $text, $cache, $parserOptions );
4394                 $wgOut->addParserOutput( $this->mParserOutput );
4395         }
4396
4397         /**
4398          * This does all the heavy lifting for outputWikitext, except it returns the parser
4399          * output instead of sending it straight to $wgOut. Makes things nice and simple for,
4400          * say, embedding thread pages within a discussion system (LiquidThreads)
4401          *
4402          * @param $text string
4403          * @param $cache boolean
4404          * @param $parserOptions parsing options, defaults to false
4405          * @return string containing parsed output
4406          */
4407         public function getOutputFromWikitext( $text, $cache = true, $parserOptions = false ) {
4408                 global $wgParser, $wgOut, $wgEnableParserCache, $wgUseFileCache;
4409
4410                 if ( !$parserOptions ) {
4411                         $parserOptions = $this->getParserOptions();
4412                 }
4413
4414                 $time = - wfTime();
4415                 $this->mParserOutput = $wgParser->parse( $text, $this->mTitle,
4416                         $parserOptions, true, true, $this->getRevIdFetched() );
4417                 $time += wfTime();
4418
4419                 # Timing hack
4420                 if ( $time > 3 ) {
4421                         wfDebugLog( 'slow-parse', sprintf( "%-5.2f %s", $time,
4422                                 $this->mTitle->getPrefixedDBkey() ) );
4423                 }
4424
4425                 if ( $wgEnableParserCache && $cache && $this->mParserOutput->isCacheable() ) {
4426                         $parserCache = ParserCache::singleton();
4427                         $parserCache->save( $this->mParserOutput, $this, $parserOptions );
4428                 }
4429
4430                 // Make sure file cache is not used on uncacheable content.
4431                 // Output that has magic words in it can still use the parser cache
4432                 // (if enabled), though it will generally expire sooner.
4433                 if ( !$this->mParserOutput->isCacheable() || $this->mParserOutput->containsOldMagic() ) {
4434                         $wgUseFileCache = false;
4435                 }
4436
4437                 $this->doCascadeProtectionUpdates( $this->mParserOutput );
4438
4439                 return $this->mParserOutput;
4440         }
4441
4442         /**
4443          * Get parser options suitable for rendering the primary article wikitext
4444          * @return mixed ParserOptions object or boolean false
4445          */
4446         public function getParserOptions() {
4447                 global $wgUser;
4448
4449                 if ( !$this->mParserOptions ) {
4450                         $this->mParserOptions = new ParserOptions( $wgUser );
4451                         $this->mParserOptions->setTidy( true );
4452                         $this->mParserOptions->enableLimitReport();
4453                 }
4454
4455                 return $this->mParserOptions;
4456         }
4457
4458         /**
4459          * Updates cascading protections
4460          *
4461          * @param $parserOutput mixed ParserOptions object, or boolean false
4462          **/
4463
4464         protected function doCascadeProtectionUpdates( $parserOutput ) {
4465                 if ( !$this->isCurrent() || wfReadOnly() || !$this->mTitle->areRestrictionsCascading() ) {
4466                         return;
4467                 }
4468
4469                 // templatelinks table may have become out of sync,
4470                 // especially if using variable-based transclusions.
4471                 // For paranoia, check if things have changed and if
4472                 // so apply updates to the database. This will ensure
4473                 // that cascaded protections apply as soon as the changes
4474                 // are visible.
4475
4476                 # Get templates from templatelinks
4477                 $id = $this->mTitle->getArticleID();
4478
4479                 $tlTemplates = array();
4480
4481                 $dbr = wfGetDB( DB_SLAVE );
4482                 $res = $dbr->select( array( 'templatelinks' ),
4483                         array( 'tl_namespace', 'tl_title' ),
4484                         array( 'tl_from' => $id ),
4485                         __METHOD__
4486                 );
4487
4488                 global $wgContLang;
4489
4490                 foreach ( $res as $row ) {
4491                         $tlTemplates["{$row->tl_namespace}:{$row->tl_title}"] = true;
4492                 }
4493
4494                 # Get templates from parser output.
4495                 $poTemplates = array();
4496                 foreach ( $parserOutput->getTemplates() as $ns => $templates ) {
4497                         foreach ( $templates as $dbk => $id ) {
4498                                 $poTemplates["$ns:$dbk"] = true;
4499                         }
4500                 }
4501
4502                 # Get the diff
4503                 # Note that we simulate array_diff_key in PHP <5.0.x
4504                 $templates_diff = array_diff_key( $poTemplates, $tlTemplates );
4505
4506                 if ( count( $templates_diff ) > 0 ) {
4507                         # Whee, link updates time.
4508                         $u = new LinksUpdate( $this->mTitle, $parserOutput, false );
4509                         $u->doUpdate();
4510                 }
4511         }
4512
4513         /**
4514          * Update all the appropriate counts in the category table, given that
4515          * we've added the categories $added and deleted the categories $deleted.
4516          *
4517          * @param $added array   The names of categories that were added
4518          * @param $deleted array The names of categories that were deleted
4519          */
4520         public function updateCategoryCounts( $added, $deleted ) {
4521                 $ns = $this->mTitle->getNamespace();
4522                 $dbw = wfGetDB( DB_MASTER );
4523
4524                 # First make sure the rows exist.  If one of the "deleted" ones didn't
4525                 # exist, we might legitimately not create it, but it's simpler to just
4526                 # create it and then give it a negative value, since the value is bogus
4527                 # anyway.
4528                 #
4529                 # Sometimes I wish we had INSERT ... ON DUPLICATE KEY UPDATE.
4530                 $insertCats = array_merge( $added, $deleted );
4531                 if ( !$insertCats ) {
4532                         # Okay, nothing to do
4533                         return;
4534                 }
4535
4536                 $insertRows = array();
4537
4538                 foreach ( $insertCats as $cat ) {
4539                         $insertRows[] = array(
4540                                 'cat_id' => $dbw->nextSequenceValue( 'category_cat_id_seq' ),
4541                                 'cat_title' => $cat
4542                         );
4543                 }
4544                 $dbw->insert( 'category', $insertRows, __METHOD__, 'IGNORE' );
4545
4546                 $addFields    = array( 'cat_pages = cat_pages + 1' );
4547                 $removeFields = array( 'cat_pages = cat_pages - 1' );
4548
4549                 if ( $ns == NS_CATEGORY ) {
4550                         $addFields[]    = 'cat_subcats = cat_subcats + 1';
4551                         $removeFields[] = 'cat_subcats = cat_subcats - 1';
4552                 } elseif ( $ns == NS_FILE ) {
4553                         $addFields[]    = 'cat_files = cat_files + 1';
4554                         $removeFields[] = 'cat_files = cat_files - 1';
4555                 }
4556
4557                 if ( $added ) {
4558                         $dbw->update(
4559                                 'category',
4560                                 $addFields,
4561                                 array( 'cat_title' => $added ),
4562                                 __METHOD__
4563                         );
4564                 }
4565
4566                 if ( $deleted ) {
4567                         $dbw->update(
4568                                 'category',
4569                                 $removeFields,
4570                                 array( 'cat_title' => $deleted ),
4571                                 __METHOD__
4572                         );
4573                 }
4574         }
4575
4576         /**
4577          * Lightweight method to get the parser output for a page, checking the parser cache
4578          * and so on. Doesn't consider most of the stuff that Article::view is forced to
4579          * consider, so it's not appropriate to use there.
4580          *
4581          * @param $oldid mixed integer Revision ID or null
4582          */
4583         public function getParserOutput( $oldid = null ) {
4584                 global $wgEnableParserCache, $wgUser, $wgOut;
4585
4586                 // Should the parser cache be used?
4587                 $useParserCache = $wgEnableParserCache &&
4588                         intval( $wgUser->getOption( 'stubthreshold' ) ) == 0 &&
4589                         $this->exists() &&
4590                         $oldid === null;
4591
4592                 wfDebug( __METHOD__ . ': using parser cache: ' . ( $useParserCache ? 'yes' : 'no' ) . "\n" );
4593
4594                 if ( $wgUser->getOption( 'stubthreshold' ) ) {
4595                         wfIncrStats( 'pcache_miss_stub' );
4596                 }
4597
4598                 $parserOutput = false;
4599                 if ( $useParserCache ) {
4600                         $parserOutput = ParserCache::singleton()->get( $this, $this->getParserOptions() );
4601                 }
4602
4603                 if ( $parserOutput === false ) {
4604                         // Cache miss; parse and output it.
4605                         $rev = Revision::newFromTitle( $this->getTitle(), $oldid );
4606
4607                         return $this->getOutputFromWikitext( $rev->getText(), $useParserCache );
4608                 } else {
4609                         return $parserOutput;
4610                 }
4611         }
4612
4613         // Deprecated methods
4614         /**
4615          * Get the database which should be used for reads
4616          *
4617          * @return Database
4618          * @deprecated - just call wfGetDB( DB_MASTER ) instead
4619          */
4620         function getDB() {
4621                 wfDeprecated( __METHOD__ );
4622                 return wfGetDB( DB_MASTER );
4623         }
4624
4625 }