includes/Article.php

   1 <?php
   2 /**
   3  * File for articles
   4  */
   5
   6 /**
   7  * Class representing a MediaWiki article and history.
   8  *
   9  * See design.txt for an overview.
  10  * Note: edit user interface and cache support functions have been
  11  * moved to separate EditPage and HTMLFileCache classes.
  12  *
  13  */
  14 class Article {
  15         /**@{{
  16          * @private
  17          */
  18         var $mComment;                  //!<
  19         var $mContent;                  //!<
  20         var $mContentLoaded;    //!<
  21         var $mCounter;                  //!<
  22         var $mForUpdate;                //!<
  23         var $mGoodAdjustment;   //!<
  24         var $mLatest;                   //!<
  25         var $mMinorEdit;                //!<
  26         var $mOldId;                    //!<
  27         var $mRedirectedFrom;   //!<
  28         var $mRedirectUrl;              //!<
  29         var $mRevIdFetched;             //!<
  30         var $mRevision;                 //!<
  31         var $mTimestamp;                //!<
  32         var $mTitle;                    //!<
  33         var $mTotalAdjustment;  //!<
  34         var $mTouched;                  //!<
  35         var $mUser;                             //!<
  36         var $mUserText;                 //!<
  37         /**@}}*/
  38
  39         /**
  40          * Constants used by internal components to get rollback results
  41          */
  42         const SUCCESS = 0;                      // Operation successful
  43         const PERM_DENIED = 1;          // Permission denied
  44         const BLOCKED = 2;                      // User has been blocked
  45         const READONLY = 3;                     // Wiki is in read-only mode
  46         const BAD_TOKEN = 4;            // Invalid token specified
  47         const BAD_TITLE = 5;            // $this is not a valid Article
  48         const ALREADY_ROLLED = 6;       // Someone else already rolled this back. $from and $summary will be set
  49         const ONLY_AUTHOR = 7;          // User is the only author of the page
  50
  51         /**
  52          * Constructor and clear the article
  53          * @param $title Reference to a Title object.
  54          * @param $oldId Integer revision ID, null to fetch from request, zero for current
  55          */
  56         function __construct( &$title, $oldId = null ) {
  57                 $this->mTitle =& $title;
  58                 $this->mOldId = $oldId;
  59                 $this->clear();
  60         }
  61
  62         /**
  63          * Tell the page view functions that this view was redirected
  64          * from another page on the wiki.
  65          * @param $from Title object.
  66          */
  67         function setRedirectedFrom( $from ) {
  68                 $this->mRedirectedFrom = $from;
  69         }
  70
  71         /**
  72          * @return mixed false, Title of in-wiki target, or string with URL
  73          */
  74         function followRedirect() {
  75                 $text = $this->getContent();
  76                 $rt = Title::newFromRedirect( $text );
  77
  78                 # process if title object is valid and not special:userlogout
  79                 if( $rt ) {
  80                         if( $rt->getInterwiki() != '' ) {
  81                                 if( $rt->isLocal() ) {
  82                                         // Offsite wikis need an HTTP redirect.
  83                                         //
  84                                         // This can be hard to reverse and may produce loops,
  85                                         // so they may be disabled in the site configuration.
  86
  87                                         $source = $this->mTitle->getFullURL( 'redirect=no' );
  88                                         return $rt->getFullURL( 'rdfrom=' . urlencode( $source ) );
  89                                 }
  90                         } else {
  91                                 if( $rt->getNamespace() == NS_SPECIAL ) {
  92                                         // Gotta handle redirects to special pages differently:
  93                                         // Fill the HTTP response "Location" header and ignore
  94                                         // the rest of the page we're on.
  95                                         //
  96                                         // This can be hard to reverse, so they may be disabled.
  97
  98                                         if( $rt->isSpecial( 'Userlogout' ) ) {
  99                                                 // rolleyes
 100                                         } else {
 101                                                 return $rt->getFullURL();
 102                                         }
 103                                 }
 104                                 return $rt;
 105                         }
 106                 }
 107
 108                 // No or invalid redirect
 109                 return false;
 110         }
 111
 112         /**
 113          * get the title object of the article
 114          */
 115         function getTitle() {
 116                 return $this->mTitle;
 117         }
 118
 119         /**
 120           * Clear the object
 121           * @private
 122           */
 123         function clear() {
 124                 $this->mDataLoaded    = false;
 125                 $this->mContentLoaded = false;
 126
 127                 $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
 128                 $this->mRedirectedFrom = null; # Title object if set
 129                 $this->mUserText =
 130                 $this->mTimestamp = $this->mComment = '';
 131                 $this->mGoodAdjustment = $this->mTotalAdjustment = 0;
 132                 $this->mTouched = '19700101000000';
 133                 $this->mForUpdate = false;
 134                 $this->mIsRedirect = false;
 135                 $this->mRevIdFetched = 0;
 136                 $this->mRedirectUrl = false;
 137                 $this->mLatest = false;
 138         }
 139
 140         /**
 141          * Note that getContent/loadContent do not follow redirects anymore.
 142          * If you need to fetch redirectable content easily, try
 143          * the shortcut in Article::followContent()
 144          * FIXME
 145          * @todo There are still side-effects in this!
 146          *        In general, you should use the Revision class, not Article,
 147          *        to fetch text for purposes other than page views.
 148          *
 149          * @return Return the text of this revision
 150         */
 151         function getContent() {
 152                 global $wgUser, $wgOut;
 153
 154                 wfProfileIn( __METHOD__ );
 155
 156                 if ( 0 == $this->getID() ) {
 157                         wfProfileOut( __METHOD__ );
 158                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
 159
 160                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 161                                 $ret = wfMsgWeirdKey ( $this->mTitle->getText() ) ;
 162                         } else {
 163                                 $ret = wfMsg( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon' );
 164                         }
 165
 166                         return "<div class='noarticletext'>$ret</div>";
 167                 } else {
 168                         $this->loadContent();
 169                         wfProfileOut( __METHOD__ );
 170                         return $this->mContent;
 171                 }
 172         }
 173
 174         /**
 175          * This function returns the text of a section, specified by a number ($section).
 176          * A section is text under a heading like == Heading == or \<h1\>Heading\</h1\>, or
 177          * the first section before any such heading (section 0).
 178          *
 179          * If a section contains subsections, these are also returned.
 180          *
 181          * @param $text String: text to look in
 182          * @param $section Integer: section number
 183          * @return string text of the requested section
 184          * @deprecated
 185          */
 186         function getSection($text,$section) {
 187                 global $wgParser;
 188                 return $wgParser->getSection( $text, $section );
 189         }
 190
 191         /**
 192          * @return int The oldid of the article that is to be shown, 0 for the
 193          *             current revision
 194          */
 195         function getOldID() {
 196                 if ( is_null( $this->mOldId ) ) {
 197                         $this->mOldId = $this->getOldIDFromRequest();
 198                 }
 199                 return $this->mOldId;
 200         }
 201
 202         /**
 203          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 204          *
 205          * @return int The old id for the request
 206          */
 207         function getOldIDFromRequest() {
 208                 global $wgRequest;
 209                 $this->mRedirectUrl = false;
 210                 $oldid = $wgRequest->getVal( 'oldid' );
 211                 if ( isset( $oldid ) ) {
 212                         $oldid = intval( $oldid );
 213                         if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 214                                 $nextid = $this->mTitle->getNextRevisionID( $oldid );
 215                                 if ( $nextid  ) {
 216                                         $oldid = $nextid;
 217                                 } else {
 218                                         $this->mRedirectUrl = $this->mTitle->getFullURL( 'redirect=no' );
 219                                 }
 220                         } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 221                                 $previd = $this->mTitle->getPreviousRevisionID( $oldid );
 222                                 if ( $previd ) {
 223                                         $oldid = $previd;
 224                                 } else {
 225                                         # TODO
 226                                 }
 227                         }
 228                         # unused:
 229                         # $lastid = $oldid;
 230                 }
 231
 232                 if ( !$oldid ) {
 233                         $oldid = 0;
 234                 }
 235                 return $oldid;
 236         }
 237
 238         /**
 239          * Load the revision (including text) into this object
 240          */
 241         function loadContent() {
 242                 if ( $this->mContentLoaded ) return;
 243
 244                 # Query variables :P
 245                 $oldid = $this->getOldID();
 246
 247                 # Pre-fill content with error message so that if something
 248                 # fails we'll have something telling us what we intended.
 249                 $this->mOldId = $oldid;
 250                 $this->fetchContent( $oldid );
 251         }
 252
 253
 254         /**
 255          * Fetch a page record with the given conditions
 256          * @param Database $dbr
 257          * @param array    $conditions
 258          * @private
 259          */
 260         function pageData( $dbr, $conditions ) {
 261                 $fields = array(
 262                                 'page_id',
 263                                 'page_namespace',
 264                                 'page_title',
 265                                 'page_restrictions',
 266                                 'page_counter',
 267                                 'page_is_redirect',
 268                                 'page_is_new',
 269                                 'page_random',
 270                                 'page_touched',
 271                                 'page_latest',
 272                                 'page_len' ) ;
 273                 wfRunHooks( 'ArticlePageDataBefore', array( &$this , &$fields ) )       ;
 274                 $row = $dbr->selectRow( 'page',
 275                         $fields,
 276                         $conditions,
 277                         'Article::pageData' );
 278                 wfRunHooks( 'ArticlePageDataAfter', array( &$this , &$row ) )   ;
 279                 return $row ;
 280         }
 281
 282         /**
 283          * @param Database $dbr
 284          * @param Title $title
 285          */
 286         function pageDataFromTitle( $dbr, $title ) {
 287                 return $this->pageData( $dbr, array(
 288                         'page_namespace' => $title->getNamespace(),
 289                         'page_title'     => $title->getDBkey() ) );
 290         }
 291
 292         /**
 293          * @param Database $dbr
 294          * @param int $id
 295          */
 296         function pageDataFromId( $dbr, $id ) {
 297                 return $this->pageData( $dbr, array( 'page_id' => $id ) );
 298         }
 299
 300         /**
 301          * Set the general counter, title etc data loaded from
 302          * some source.
 303          *
 304          * @param object $data
 305          * @private
 306          */
 307         function loadPageData( $data = 'fromdb' ) {
 308                 if ( $data === 'fromdb' ) {
 309                         $dbr = $this->getDB();
 310                         $data = $this->pageDataFromId( $dbr, $this->getId() );
 311                 }
 312
 313                 $lc =& LinkCache::singleton();
 314                 if ( $data ) {
 315                         $lc->addGoodLinkObj( $data->page_id, $this->mTitle );
 316
 317                         $this->mTitle->mArticleID = $data->page_id;
 318
 319                         # Old-fashioned restrictions.
 320                         $this->mTitle->loadRestrictions( $data->page_restrictions );
 321
 322                         $this->mCounter     = $data->page_counter;
 323                         $this->mTouched     = wfTimestamp( TS_MW, $data->page_touched );
 324                         $this->mIsRedirect  = $data->page_is_redirect;
 325                         $this->mLatest      = $data->page_latest;
 326                 } else {
 327                         if ( is_object( $this->mTitle ) ) {
 328                                 $lc->addBadLinkObj( $this->mTitle );
 329                         }
 330                         $this->mTitle->mArticleID = 0;
 331                 }
 332
 333                 $this->mDataLoaded  = true;
 334         }
 335
 336         /**
 337          * Get text of an article from database
 338          * Does *NOT* follow redirects.
 339          * @param int $oldid 0 for whatever the latest revision is
 340          * @return string
 341          */
 342         function fetchContent( $oldid = 0 ) {
 343                 if ( $this->mContentLoaded ) {
 344                         return $this->mContent;
 345                 }
 346
 347                 $dbr = $this->getDB();
 348
 349                 # Pre-fill content with error message so that if something
 350                 # fails we'll have something telling us what we intended.
 351                 $t = $this->mTitle->getPrefixedText();
 352                 if( $oldid ) {
 353                         $t .= ',oldid='.$oldid;
 354                 }
 355                 $this->mContent = wfMsg( 'missingarticle', $t ) ;
 356
 357                 if( $oldid ) {
 358                         $revision = Revision::newFromId( $oldid );
 359                         if( is_null( $revision ) ) {
 360                                 wfDebug( __METHOD__." failed to retrieve specified revision, id $oldid\n" );
 361                                 return false;
 362                         }
 363                         $data = $this->pageDataFromId( $dbr, $revision->getPage() );
 364                         if( !$data ) {
 365                                 wfDebug( __METHOD__." failed to get page data linked to revision id $oldid\n" );
 366                                 return false;
 367                         }
 368                         $this->mTitle = Title::makeTitle( $data->page_namespace, $data->page_title );
 369                         $this->loadPageData( $data );
 370                 } else {
 371                         if( !$this->mDataLoaded ) {
 372                                 $data = $this->pageDataFromTitle( $dbr, $this->mTitle );
 373                                 if( !$data ) {
 374                                         wfDebug( __METHOD__." failed to find page data for title " . $this->mTitle->getPrefixedText() . "\n" );
 375                                         return false;
 376                                 }
 377                                 $this->loadPageData( $data );
 378                         }
 379                         $revision = Revision::newFromId( $this->mLatest );
 380                         if( is_null( $revision ) ) {
 381                                 wfDebug( __METHOD__." failed to retrieve current page, rev_id {$data->page_latest}\n" );
 382                                 return false;
 383                         }
 384                 }
 385
 386                 // FIXME: Horrible, horrible! This content-loading interface just plain sucks.
 387                 // We should instead work with the Revision object when we need it...
 388                 $this->mContent = $revision->userCan( Revision::DELETED_TEXT ) ? $revision->getRawText() : "";
 389                 //$this->mContent   = $revision->getText();
 390
 391                 $this->mUser      = $revision->getUser();
 392                 $this->mUserText  = $revision->getUserText();
 393                 $this->mComment   = $revision->getComment();
 394                 $this->mTimestamp = wfTimestamp( TS_MW, $revision->getTimestamp() );
 395
 396                 $this->mRevIdFetched = $revision->getID();
 397                 $this->mContentLoaded = true;
 398                 $this->mRevision =& $revision;
 399
 400                 wfRunHooks( 'ArticleAfterFetchContent', array( &$this, &$this->mContent ) ) ;
 401
 402                 return $this->mContent;
 403         }
 404
 405         /**
 406          * Read/write accessor to select FOR UPDATE
 407          *
 408          * @param $x Mixed: FIXME
 409          */
 410         function forUpdate( $x = NULL ) {
 411                 return wfSetVar( $this->mForUpdate, $x );
 412         }
 413
 414         /**
 415          * Get the database which should be used for reads
 416          *
 417          * @return Database
 418          */
 419         function getDB() {
 420                 return wfGetDB( DB_MASTER );
 421         }
 422
 423         /**
 424          * Get options for all SELECT statements
 425          *
 426          * @param $options Array: an optional options array which'll be appended to
 427          *                       the default
 428          * @return Array: options
 429          */
 430         function getSelectOptions( $options = '' ) {
 431                 if ( $this->mForUpdate ) {
 432                         if ( is_array( $options ) ) {
 433                                 $options[] = 'FOR UPDATE';
 434                         } else {
 435                                 $options = 'FOR UPDATE';
 436                         }
 437                 }
 438                 return $options;
 439         }
 440
 441         /**
 442          * @return int Page ID
 443          */
 444         function getID() {
 445                 if( $this->mTitle ) {
 446                         return $this->mTitle->getArticleID();
 447                 } else {
 448                         return 0;
 449                 }
 450         }
 451
 452         /**
 453          * @return bool Whether or not the page exists in the database
 454          */
 455         function exists() {
 456                 return $this->getId() != 0;
 457         }
 458
 459         /**
 460          * @return int The view count for the page
 461          */
 462         function getCount() {
 463                 if ( -1 == $this->mCounter ) {
 464                         $id = $this->getID();
 465                         if ( $id == 0 ) {
 466                                 $this->mCounter = 0;
 467                         } else {
 468                                 $dbr = wfGetDB( DB_SLAVE );
 469                                 $this->mCounter = $dbr->selectField( 'page', 'page_counter', array( 'page_id' => $id ),
 470                                         'Article::getCount', $this->getSelectOptions() );
 471                         }
 472                 }
 473                 return $this->mCounter;
 474         }
 475
 476         /**
 477          * Determine whether a page  would be suitable for being counted as an
 478          * article in the site_stats table based on the title & its content
 479          *
 480          * @param $text String: text to analyze
 481          * @return bool
 482          */
 483         function isCountable( $text ) {
 484                 global $wgUseCommaCount;
 485
 486                 $token = $wgUseCommaCount ? ',' : '[[';
 487                 return
 488                         $this->mTitle->isContentPage()
 489                         && !$this->isRedirect( $text )
 490                         && in_string( $token, $text );
 491         }
 492
 493         /**
 494          * Tests if the article text represents a redirect
 495          *
 496          * @param $text String: FIXME
 497          * @return bool
 498          */
 499         function isRedirect( $text = false ) {
 500                 if ( $text === false ) {
 501                         $this->loadContent();
 502                         $titleObj = Title::newFromRedirect( $this->fetchContent() );
 503                 } else {
 504                         $titleObj = Title::newFromRedirect( $text );
 505                 }
 506                 return $titleObj !== NULL;
 507         }
 508
 509         /**
 510          * Returns true if the currently-referenced revision is the current edit
 511          * to this page (and it exists).
 512          * @return bool
 513          */
 514         function isCurrent() {
 515                 # If no oldid, this is the current version.
 516                 if ($this->getOldID() == 0)
 517                         return true;
 518
 519                 return $this->exists() &&
 520                         isset( $this->mRevision ) &&
 521                         $this->mRevision->isCurrent();
 522         }
 523
 524         /**
 525          * Loads everything except the text
 526          * This isn't necessary for all uses, so it's only done if needed.
 527          * @private
 528          */
 529         function loadLastEdit() {
 530                 if ( -1 != $this->mUser )
 531                         return;
 532
 533                 # New or non-existent articles have no user information
 534                 $id = $this->getID();
 535                 if ( 0 == $id ) return;
 536
 537                 $this->mLastRevision = Revision::loadFromPageId( $this->getDB(), $id );
 538                 if( !is_null( $this->mLastRevision ) ) {
 539                         $this->mUser      = $this->mLastRevision->getUser();
 540                         $this->mUserText  = $this->mLastRevision->getUserText();
 541                         $this->mTimestamp = $this->mLastRevision->getTimestamp();
 542                         $this->mComment   = $this->mLastRevision->getComment();
 543                         $this->mMinorEdit = $this->mLastRevision->isMinor();
 544                         $this->mRevIdFetched = $this->mLastRevision->getID();
 545                 }
 546         }
 547
 548         function getTimestamp() {
 549                 // Check if the field has been filled by ParserCache::get()
 550                 if ( !$this->mTimestamp ) {
 551                         $this->loadLastEdit();
 552                 }
 553                 return wfTimestamp(TS_MW, $this->mTimestamp);
 554         }
 555
 556         function getUser() {
 557                 $this->loadLastEdit();
 558                 return $this->mUser;
 559         }
 560
 561         function getUserText() {
 562                 $this->loadLastEdit();
 563                 return $this->mUserText;
 564         }
 565
 566         function getComment() {
 567                 $this->loadLastEdit();
 568                 return $this->mComment;
 569         }
 570
 571         function getMinorEdit() {
 572                 $this->loadLastEdit();
 573                 return $this->mMinorEdit;
 574         }
 575
 576         function getRevIdFetched() {
 577                 $this->loadLastEdit();
 578                 return $this->mRevIdFetched;
 579         }
 580
 581         /**
 582          * @todo Document, fixme $offset never used.
 583          * @param $limit Integer: default 0.
 584          * @param $offset Integer: default 0.
 585          */
 586         function getContributors($limit = 0, $offset = 0) {
 587                 # XXX: this is expensive; cache this info somewhere.
 588
 589                 $contribs = array();
 590                 $dbr = wfGetDB( DB_SLAVE );
 591                 $revTable = $dbr->tableName( 'revision' );
 592                 $userTable = $dbr->tableName( 'user' );
 593                 $user = $this->getUser();
 594                 $pageId = $this->getId();
 595
 596                 $sql = "SELECT rev_user, rev_user_text, user_real_name, MAX(rev_timestamp) as timestamp
 597                         FROM $revTable LEFT JOIN $userTable ON rev_user = user_id
 598                         WHERE rev_page = $pageId
 599                         AND rev_user != $user
 600                         GROUP BY rev_user, rev_user_text, user_real_name
 601                         ORDER BY timestamp DESC";
 602
 603                 if ($limit > 0) { $sql .= ' LIMIT '.$limit; }
 604                 $sql .= ' '. $this->getSelectOptions();
 605
 606                 $res = $dbr->query($sql, __METHOD__);
 607
 608                 while ( $line = $dbr->fetchObject( $res ) ) {
 609                         $contribs[] = array($line->rev_user, $line->rev_user_text, $line->user_real_name);
 610                 }
 611
 612                 $dbr->freeResult($res);
 613                 return $contribs;
 614         }
 615
 616         /**
 617          * This is the default action of the script: just view the page of
 618          * the given title.
 619         */
 620         function view() {
 621                 global $wgUser, $wgOut, $wgRequest, $wgContLang;
 622                 global $wgEnableParserCache, $wgStylePath, $wgUseRCPatrol, $wgParser;
 623                 global $wgUseTrackbacks, $wgNamespaceRobotPolicies, $wgArticleRobotPolicies;
 624                 $sk = $wgUser->getSkin();
 625
 626                 wfProfileIn( __METHOD__ );
 627
 628                 $parserCache =& ParserCache::singleton();
 629                 $ns = $this->mTitle->getNamespace(); # shortcut
 630
 631                 # Get variables from query string
 632                 $oldid = $this->getOldID();
 633
 634                 # getOldID may want us to redirect somewhere else
 635                 if ( $this->mRedirectUrl ) {
 636                         $wgOut->redirect( $this->mRedirectUrl );
 637                         wfProfileOut( __METHOD__ );
 638                         return;
 639                 }
 640
 641                 $diff = $wgRequest->getVal( 'diff' );
 642                 $rcid = $wgRequest->getVal( 'rcid' );
 643                 $rdfrom = $wgRequest->getVal( 'rdfrom' );
 644                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
 645
 646                 $wgOut->setArticleFlag( true );
 647
 648                 # Discourage indexing of printable versions, but encourage following
 649                 if( $wgOut->isPrintable() ) {
 650                         $policy = 'noindex,follow';
 651                 } elseif ( isset( $wgArticleRobotPolicies[$this->mTitle->getPrefixedText()] ) ) {
 652                         $policy = $wgArticleRobotPolicies[$this->mTitle->getPrefixedText()];
 653                 } elseif( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 654                         # Honour customised robot policies for this namespace
 655                         $policy = $wgNamespaceRobotPolicies[$ns];
 656                 } else {
 657                         # Default to encourage indexing and following links
 658                         $policy = 'index,follow';
 659                 }
 660                 $wgOut->setRobotPolicy( $policy );
 661
 662                 # If we got diff and oldid in the query, we want to see a
 663                 # diff page instead of the article.
 664
 665                 if ( !is_null( $diff ) ) {
 666                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 667
 668                         $de = new DifferenceEngine( $this->mTitle, $oldid, $diff, $rcid );
 669                         // DifferenceEngine directly fetched the revision:
 670                         $this->mRevIdFetched = $de->mNewid;
 671                         $de->showDiffPage( $diffOnly );
 672
 673                         // Needed to get the page's current revision
 674                         $this->loadPageData();
 675                         if( $diff == 0 || $diff == $this->mLatest ) {
 676                                 # Run view updates for current revision only
 677                                 $this->viewUpdates();
 678                         }
 679                         wfProfileOut( __METHOD__ );
 680                         return;
 681                 }
 682
 683                 if ( empty( $oldid ) && $this->checkTouched() ) {
 684                         $wgOut->setETag($parserCache->getETag($this, $wgUser));
 685
 686                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 687                                 wfProfileOut( __METHOD__ );
 688                                 return;
 689                         } else if ( $this->tryFileCache() ) {
 690                                 # tell wgOut that output is taken care of
 691                                 $wgOut->disable();
 692                                 $this->viewUpdates();
 693                                 wfProfileOut( __METHOD__ );
 694                                 return;
 695                         }
 696                 }
 697
 698                 # Should the parser cache be used?
 699                 $pcache = $wgEnableParserCache
 700                         && intval( $wgUser->getOption( 'stubthreshold' ) ) == 0
 701                         && $this->exists()
 702                         && empty( $oldid )
 703                         && !$this->mTitle->isCssOrJsPage()
 704                         && !$this->mTitle->isCssJsSubpage();
 705                 wfDebug( 'Article::view using parser cache: ' . ($pcache ? 'yes' : 'no' ) . "\n" );
 706                 if ( $wgUser->getOption( 'stubthreshold' ) ) {
 707                         wfIncrStats( 'pcache_miss_stub' );
 708                 }
 709
 710                 $wasRedirected = false;
 711                 if ( isset( $this->mRedirectedFrom ) ) {
 712                         // This is an internally redirected page view.
 713                         // We'll need a backlink to the source page for navigation.
 714                         if ( wfRunHooks( 'ArticleViewRedirect', array( &$this ) ) ) {
 715                                 $sk = $wgUser->getSkin();
 716                                 $redir = $sk->makeKnownLinkObj( $this->mRedirectedFrom, '', 'redirect=no' );
 717                                 $s = wfMsg( 'redirectedfrom', $redir );
 718                                 $wgOut->setSubtitle( $s );
 719
 720                                 // Set the fragment if one was specified in the redirect
 721                                 if ( strval( $this->mTitle->getFragment() ) != '' ) {
 722                                         $fragment = Xml::escapeJsString( $this->mTitle->getFragmentForURL() );
 723                                         $wgOut->addInlineScript( "redirectToFragment(\"$fragment\");" );
 724                                 }
 725                                 $wasRedirected = true;
 726                         }
 727                 } elseif ( !empty( $rdfrom ) ) {
 728                         // This is an externally redirected view, from some other wiki.
 729                         // If it was reported from a trusted site, supply a backlink.
 730                         global $wgRedirectSources;
 731                         if( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 732                                 $sk = $wgUser->getSkin();
 733                                 $redir = $sk->makeExternalLink( $rdfrom, $rdfrom );
 734                                 $s = wfMsg( 'redirectedfrom', $redir );
 735                                 $wgOut->setSubtitle( $s );
 736                                 $wasRedirected = true;
 737                         }
 738                 }
 739
 740                 $outputDone = false;
 741                 wfRunHooks( 'ArticleViewHeader', array( &$this, &$outputDone, &$pcache ) );
 742                 if ( $pcache ) {
 743                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 744                                 // Ensure that UI elements requiring revision ID have
 745                                 // the correct version information.
 746                                 $wgOut->setRevisionId( $this->mLatest );
 747                                 $outputDone = true;
 748                         }
 749                 }
 750                 if ( !$outputDone ) {
 751                         $text = $this->getContent();
 752                         if ( $text === false ) {
 753                                 # Failed to load, replace text with error message
 754                                 $t = $this->mTitle->getPrefixedText();
 755                                 if( $oldid ) {
 756                                         $t .= ',oldid='.$oldid;
 757                                         $text = wfMsg( 'missingarticle', $t );
 758                                 } else {
 759                                         $text = wfMsg( 'noarticletext', $t );
 760                                 }
 761                         }
 762
 763                         # Another whitelist check in case oldid is altering the title
 764                         if ( !$this->mTitle->userCanRead() ) {
 765                                 $wgOut->loginToUse();
 766                                 $wgOut->output();
 767                                 exit;
 768                         }
 769
 770                         # We're looking at an old revision
 771
 772                         if ( !empty( $oldid ) ) {
 773                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 774                                 if( is_null( $this->mRevision ) ) {
 775                                         // FIXME: This would be a nice place to load the 'no such page' text.
 776                                 } else {
 777                                         $this->setOldSubtitle( isset($this->mOldId) ? $this->mOldId : $oldid );
 778                                         if( $this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
 779                                                 if( !$this->mRevision->userCan( Revision::DELETED_TEXT ) ) {
 780                                                         $wgOut->addWikiText( wfMsg( 'rev-deleted-text-permission' ) );
 781                                                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 782                                                         return;
 783                                                 } else {
 784                                                         $wgOut->addWikiText( wfMsg( 'rev-deleted-text-view' ) );
 785                                                         // and we are allowed to see...
 786                                                 }
 787                                         }
 788                                 }
 789
 790                         }
 791                 }
 792                 if( !$outputDone ) {
 793                         $wgOut->setRevisionId( $this->getRevIdFetched() );
 794
 795                          // Pages containing custom CSS or JavaScript get special treatment
 796                         if( $this->mTitle->isCssOrJsPage() || $this->mTitle->isCssJsSubpage() ) {
 797                                 $wgOut->addHtml( wfMsgExt( 'clearyourcache', 'parse' ) );
 798
 799                                 // Give hooks a chance to customise the output
 800                                 if( wfRunHooks( 'ShowRawCssJs', array( $this->mContent, $this->mTitle, $wgOut ) ) ) {
 801                                         // Wrap the whole lot in a <pre> and don't parse
 802                                         preg_match( '!\.(css|js)$!u', $this->mTitle->getText(), $m );
 803                                         $wgOut->addHtml( "<pre class=\"mw-code mw-{$m[1]}\" dir=\"ltr\">\n" );
 804                                         $wgOut->addHtml( htmlspecialchars( $this->mContent ) );
 805                                         $wgOut->addHtml( "\n</pre>\n" );
 806                                 }
 807
 808                         }
 809
 810                         elseif ( $rt = Title::newFromRedirect( $text ) ) {
 811                                 # Display redirect
 812                                 $imageDir = $wgContLang->isRTL() ? 'rtl' : 'ltr';
 813                                 $imageUrl = $wgStylePath.'/common/images/redirect' . $imageDir . '.png';
 814                                 # Don't overwrite the subtitle if this was an old revision
 815                                 if( !$wasRedirected && $this->isCurrent() ) {
 816                                         $wgOut->setSubtitle( wfMsgHtml( 'redirectpagesub' ) );
 817                                 }
 818                                 $link = $sk->makeLinkObj( $rt, $rt->getFullText() );
 819
 820                                 $wgOut->addHTML( '<img src="'.$imageUrl.'" alt="#REDIRECT " />' .
 821                                   '<span class="redirectText">'.$link.'</span>' );
 822
 823                                 $parseout = $wgParser->parse($text, $this->mTitle, ParserOptions::newFromUser($wgUser));
 824                                 $wgOut->addParserOutputNoText( $parseout );
 825                         } else if ( $pcache ) {
 826                                 # Display content and save to parser cache
 827                                 $this->outputWikiText( $text );
 828                         } else {
 829                                 # Display content, don't attempt to save to parser cache
 830                                 # Don't show section-edit links on old revisions... this way lies madness.
 831                                 if( !$this->isCurrent() ) {
 832                                         $oldEditSectionSetting = $wgOut->parserOptions()->setEditSection( false );
 833                                 }
 834                                 # Display content and don't save to parser cache
 835                                 # With timing hack -- TS 2006-07-26
 836                                 $time = -wfTime();
 837                                 $this->outputWikiText( $text, false );
 838                                 $time += wfTime();
 839
 840                                 # Timing hack
 841                                 if ( $time > 3 ) {
 842                                         wfDebugLog( 'slow-parse', sprintf( "%-5.2f %s", $time,
 843                                                 $this->mTitle->getPrefixedDBkey()));
 844                                 }
 845
 846                                 if( !$this->isCurrent() ) {
 847                                         $wgOut->parserOptions()->setEditSection( $oldEditSectionSetting );
 848                                 }
 849
 850                         }
 851                 }
 852                 /* title may have been set from the cache */
 853                 $t = $wgOut->getPageTitle();
 854                 if( empty( $t ) ) {
 855                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 856                 }
 857
 858                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 859                 if( $ns == NS_USER_TALK &&
 860                         User::isIP( $this->mTitle->getText() ) ) {
 861                         $wgOut->addWikiText( wfMsg('anontalkpagetext') );
 862                 }
 863
 864                 # If we have been passed an &rcid= parameter, we want to give the user a
 865                 # chance to mark this new article as patrolled.
 866                 if ( $wgUseRCPatrol && !is_null( $rcid ) && $rcid != 0 && $wgUser->isAllowed( 'patrol' ) ) {
 867                         $wgOut->addHTML(
 868                                 "<div class='patrollink'>" .
 869                                         wfMsgHtml( 'markaspatrolledlink',
 870                                         $sk->makeKnownLinkObj( $this->mTitle, wfMsgHtml('markaspatrolledtext'),
 871                                                 "action=markpatrolled&rcid=$rcid" )
 872                                         ) .
 873                                 '</div>'
 874                          );
 875                 }
 876
 877                 # Trackbacks
 878                 if ($wgUseTrackbacks)
 879                         $this->addTrackbacks();
 880
 881                 $this->viewUpdates();
 882                 wfProfileOut( __METHOD__ );
 883         }
 884
 885         function addTrackbacks() {
 886                 global $wgOut, $wgUser;
 887
 888                 $dbr = wfGetDB(DB_SLAVE);
 889                 $tbs = $dbr->select(
 890                                 /* FROM   */ 'trackbacks',
 891                                 /* SELECT */ array('tb_id', 'tb_title', 'tb_url', 'tb_ex', 'tb_name'),
 892                                 /* WHERE  */ array('tb_page' => $this->getID())
 893                 );
 894
 895                 if (!$dbr->numrows($tbs))
 896                         return;
 897
 898                 $tbtext = "";
 899                 while ($o = $dbr->fetchObject($tbs)) {
 900                         $rmvtxt = "";
 901                         if ($wgUser->isAllowed( 'trackback' )) {
 902                                 $delurl = $this->mTitle->getFullURL("action=deletetrackback&tbid="
 903                                                 . $o->tb_id . "&token=" . urlencode( $wgUser->editToken() ) );
 904                                 $rmvtxt = wfMsg( 'trackbackremove', htmlspecialchars( $delurl ) );
 905                         }
 906                         $tbtext .= wfMsg(strlen($o->tb_ex) ? 'trackbackexcerpt' : 'trackback',
 907                                         $o->tb_title,
 908                                         $o->tb_url,
 909                                         $o->tb_ex,
 910                                         $o->tb_name,
 911                                         $rmvtxt);
 912                 }
 913                 $wgOut->addWikitext(wfMsg('trackbackbox', $tbtext));
 914         }
 915
 916         function deletetrackback() {
 917                 global $wgUser, $wgRequest, $wgOut, $wgTitle;
 918
 919                 if (!$wgUser->matchEditToken($wgRequest->getVal('token'))) {
 920                         $wgOut->addWikitext(wfMsg('sessionfailure'));
 921                         return;
 922                 }
 923
 924                 if ((!$wgUser->isAllowed('delete'))) {
 925                         $wgOut->permissionRequired( 'delete' );
 926                         return;
 927                 }
 928
 929                 if (wfReadOnly()) {
 930                         $wgOut->readOnlyPage();
 931                         return;
 932                 }
 933
 934                 $db = wfGetDB(DB_MASTER);
 935                 $db->delete('trackbacks', array('tb_id' => $wgRequest->getInt('tbid')));
 936                 $wgTitle->invalidateCache();
 937                 $wgOut->addWikiText(wfMsg('trackbackdeleteok'));
 938         }
 939
 940         function render() {
 941                 global $wgOut;
 942
 943                 $wgOut->setArticleBodyOnly(true);
 944                 $this->view();
 945         }
 946
 947         /**
 948          * Handle action=purge
 949          */
 950         function purge() {
 951                 global $wgUser, $wgRequest, $wgOut;
 952
 953                 if ( $wgUser->isAllowed( 'purge' ) || $wgRequest->wasPosted() ) {
 954                         if( wfRunHooks( 'ArticlePurge', array( &$this ) ) ) {
 955                                 $this->doPurge();
 956                         }
 957                 } else {
 958                         $msg = $wgOut->parse( wfMsg( 'confirm_purge' ) );
 959                         $action = $this->mTitle->escapeLocalURL( 'action=purge' );
 960                         $button = htmlspecialchars( wfMsg( 'confirm_purge_button' ) );
 961                         $msg = str_replace( '$1',
 962                                 "<form method=\"post\" action=\"$action\">\n" .
 963                                 "<input type=\"submit\" name=\"submit\" value=\"$button\" />\n" .
 964                                 "</form>\n", $msg );
 965
 966                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 967                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
 968                         $wgOut->addHTML( $msg );
 969                 }
 970         }
 971
 972         /**
 973          * Perform the actions of a page purging
 974          */
 975         function doPurge() {
 976                 global $wgUseSquid;
 977                 // Invalidate the cache
 978                 $this->mTitle->invalidateCache();
 979
 980                 if ( $wgUseSquid ) {
 981                         // Commit the transaction before the purge is sent
 982                         $dbw = wfGetDB( DB_MASTER );
 983                         $dbw->immediateCommit();
 984
 985                         // Send purge
 986                         $update = SquidUpdate::newSimplePurge( $this->mTitle );
 987                         $update->doUpdate();
 988                 }
 989                 $this->view();
 990         }
 991
 992         /**
 993          * Insert a new empty page record for this article.
 994          * This *must* be followed up by creating a revision
 995          * and running $this->updateToLatest( $rev_id );
 996          * or else the record will be left in a funky state.
 997          * Best if all done inside a transaction.
 998          *
 999          * @param Database $dbw
1000          * @return int     The newly created page_id key
1001          * @private
1002          */
1003         function insertOn( $dbw ) {
1004                 wfProfileIn( __METHOD__ );
1005
1006                 $page_id = $dbw->nextSequenceValue( 'page_page_id_seq' );
1007                 $dbw->insert( 'page', array(
1008                         'page_id'           => $page_id,
1009                         'page_namespace'    => $this->mTitle->getNamespace(),
1010                         'page_title'        => $this->mTitle->getDBkey(),
1011                         'page_counter'      => 0,
1012                         'page_restrictions' => '',
1013                         'page_is_redirect'  => 0, # Will set this shortly...
1014                         'page_is_new'       => 1,
1015                         'page_random'       => wfRandom(),
1016                         'page_touched'      => $dbw->timestamp(),
1017                         'page_latest'       => 0, # Fill this in shortly...
1018                         'page_len'          => 0, # Fill this in shortly...
1019                 ), __METHOD__ );
1020                 $newid = $dbw->insertId();
1021
1022                 $this->mTitle->resetArticleId( $newid );
1023
1024                 wfProfileOut( __METHOD__ );
1025                 return $newid;
1026         }
1027
1028         /**
1029          * Update the page record to point to a newly saved revision.
1030          *
1031          * @param Database $dbw
1032          * @param Revision $revision For ID number, and text used to set
1033                                      length and redirect status fields
1034          * @param int $lastRevision If given, will not overwrite the page field
1035          *                          when different from the currently set value.
1036          *                          Giving 0 indicates the new page flag should
1037          *                          be set on.
1038          * @param bool $lastRevIsRedirect If given, will optimize adding and
1039          *                                                      removing rows in redirect table.
1040          * @return bool true on success, false on failure
1041          * @private
1042          */
1043         function updateRevisionOn( &$dbw, $revision, $lastRevision = null, $lastRevIsRedirect = null ) {
1044                 wfProfileIn( __METHOD__ );
1045
1046                 $text = $revision->getText();
1047                 $rt = Title::newFromRedirect( $text );
1048
1049                 $conditions = array( 'page_id' => $this->getId() );
1050                 if( !is_null( $lastRevision ) ) {
1051                         # An extra check against threads stepping on each other
1052                         $conditions['page_latest'] = $lastRevision;
1053                 }
1054
1055                 $dbw->update( 'page',
1056                         array( /* SET */
1057                                 'page_latest'      => $revision->getId(),
1058                                 'page_touched'     => $dbw->timestamp(),
1059                                 'page_is_new'      => ($lastRevision === 0) ? 1 : 0,
1060                                 'page_is_redirect' => $rt !== NULL ? 1 : 0,
1061                                 'page_len'         => strlen( $text ),
1062                         ),
1063                         $conditions,
1064                         __METHOD__ );
1065
1066                 $result = $dbw->affectedRows() != 0;
1067
1068                 if ($result) {
1069                         // FIXME: Should the result from updateRedirectOn() be returned instead?
1070                         $this->updateRedirectOn( $dbw, $rt, $lastRevIsRedirect );
1071                 }
1072
1073                 wfProfileOut( __METHOD__ );
1074                 return $result;
1075         }
1076
1077         /**
1078          * Add row to the redirect table if this is a redirect, remove otherwise.
1079          *
1080          * @param Database $dbw
1081          * @param $redirectTitle a title object pointing to the redirect target,
1082          *                                                      or NULL if this is not a redirect
1083          * @param bool $lastRevIsRedirect If given, will optimize adding and
1084          *                                                      removing rows in redirect table.
1085          * @return bool true on success, false on failure
1086          * @private
1087          */
1088         function updateRedirectOn( &$dbw, $redirectTitle, $lastRevIsRedirect = null ) {
1089
1090                 // Always update redirects (target link might have changed)
1091                 // Update/Insert if we don't know if the last revision was a redirect or not
1092                 // Delete if changing from redirect to non-redirect
1093                 $isRedirect = !is_null($redirectTitle);
1094                 if ($isRedirect || is_null($lastRevIsRedirect) || $lastRevIsRedirect !== $isRedirect) {
1095
1096                         wfProfileIn( __METHOD__ );
1097
1098                         if ($isRedirect) {
1099
1100                                 // This title is a redirect, Add/Update row in the redirect table
1101                                 $set = array( /* SET */
1102                                         'rd_namespace' => $redirectTitle->getNamespace(),
1103                                         'rd_title'     => $redirectTitle->getDBkey(),
1104                                         'rd_from'      => $this->getId(),
1105                                 );
1106
1107                                 $dbw->replace( 'redirect', array( 'rd_from' ), $set, __METHOD__ );
1108                         } else {
1109                                 // This is not a redirect, remove row from redirect table
1110                                 $where = array( 'rd_from' => $this->getId() );
1111                                 $dbw->delete( 'redirect', $where, __METHOD__);
1112                         }
1113
1114                         wfProfileOut( __METHOD__ );
1115                         return ( $dbw->affectedRows() != 0 );
1116                 }
1117
1118                 return true;
1119         }
1120
1121         /**
1122          * If the given revision is newer than the currently set page_latest,
1123          * update the page record. Otherwise, do nothing.
1124          *
1125          * @param Database $dbw
1126          * @param Revision $revision
1127          */
1128         function updateIfNewerOn( &$dbw, $revision ) {
1129                 wfProfileIn( __METHOD__ );
1130
1131                 $row = $dbw->selectRow(
1132                         array( 'revision', 'page' ),
1133                         array( 'rev_id', 'rev_timestamp', 'page_is_redirect' ),
1134                         array(
1135                                 'page_id' => $this->getId(),
1136                                 'page_latest=rev_id' ),
1137                         __METHOD__ );
1138                 if( $row ) {
1139                         if( wfTimestamp(TS_MW, $row->rev_timestamp) >= $revision->getTimestamp() ) {
1140                                 wfProfileOut( __METHOD__ );
1141                                 return false;
1142                         }
1143                         $prev = $row->rev_id;
1144                         $lastRevIsRedirect = (bool)$row->page_is_redirect;
1145                 } else {
1146                         # No or missing previous revision; mark the page as new
1147                         $prev = 0;
1148                         $lastRevIsRedirect = null;
1149                 }
1150
1151                 $ret = $this->updateRevisionOn( $dbw, $revision, $prev, $lastRevIsRedirect );
1152                 wfProfileOut( __METHOD__ );
1153                 return $ret;
1154         }
1155
1156         /**
1157          * @return string Complete article text, or null if error
1158          */
1159         function replaceSection($section, $text, $summary = '', $edittime = NULL) {
1160                 wfProfileIn( __METHOD__ );
1161
1162                 if( $section == '' ) {
1163                         // Whole-page edit; let the text through unmolested.
1164                 } else {
1165                         if( is_null( $edittime ) ) {
1166                                 $rev = Revision::newFromTitle( $this->mTitle );
1167                         } else {
1168                                 $dbw = wfGetDB( DB_MASTER );
1169                                 $rev = Revision::loadFromTimestamp( $dbw, $this->mTitle, $edittime );
1170                         }
1171                         if( is_null( $rev ) ) {
1172                                 wfDebug( "Article::replaceSection asked for bogus section (page: " .
1173                                         $this->getId() . "; section: $section; edittime: $edittime)\n" );
1174                                 return null;
1175                         }
1176                         $oldtext = $rev->getText();
1177
1178                         if( $section == 'new' ) {
1179                                 # Inserting a new section
1180                                 $subject = $summary ? "== {$summary} ==\n\n" : '';
1181                                 $text = strlen( trim( $oldtext ) ) > 0
1182                                                 ? "{$oldtext}\n\n{$subject}{$text}"
1183                                                 : "{$subject}{$text}";
1184                         } else {
1185                                 # Replacing an existing section; roll out the big guns
1186                                 global $wgParser;
1187                                 $text = $wgParser->replaceSection( $oldtext, $section, $text );
1188                         }
1189
1190                 }
1191
1192                 wfProfileOut( __METHOD__ );
1193                 return $text;
1194         }
1195
1196         /**
1197          * @deprecated use Article::doEdit()
1198          */
1199         function insertNewArticle( $text, $summary, $isminor, $watchthis, $suppressRC=false, $comment=false ) {
1200                 $flags = EDIT_NEW | EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1201                         ( $isminor ? EDIT_MINOR : 0 ) |
1202                         ( $suppressRC ? EDIT_SUPPRESS_RC : 0 );
1203
1204                 # If this is a comment, add the summary as headline
1205                 if ( $comment && $summary != "" ) {
1206                         $text = "== {$summary} ==\n\n".$text;
1207                 }
1208
1209                 $this->doEdit( $text, $summary, $flags );
1210
1211                 $dbw = wfGetDB( DB_MASTER );
1212                 if ($watchthis) {
1213                         if (!$this->mTitle->userIsWatching()) {
1214                                 $dbw->begin();
1215                                 $this->doWatch();
1216                                 $dbw->commit();
1217                         }
1218                 } else {
1219                         if ( $this->mTitle->userIsWatching() ) {
1220                                 $dbw->begin();
1221                                 $this->doUnwatch();
1222                                 $dbw->commit();
1223                         }
1224                 }
1225                 $this->doRedirect( $this->isRedirect( $text ) );
1226         }
1227
1228         /**
1229          * @deprecated use Article::doEdit()
1230          */
1231         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
1232                 $flags = EDIT_UPDATE | EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1233                         ( $minor ? EDIT_MINOR : 0 ) |
1234                         ( $forceBot ? EDIT_FORCE_BOT : 0 );
1235
1236                 $good = $this->doEdit( $text, $summary, $flags );
1237                 if ( $good ) {
1238                         $dbw = wfGetDB( DB_MASTER );
1239                         if ($watchthis) {
1240                                 if (!$this->mTitle->userIsWatching()) {
1241                                         $dbw->begin();
1242                                         $this->doWatch();
1243                                         $dbw->commit();
1244                                 }
1245                         } else {
1246                                 if ( $this->mTitle->userIsWatching() ) {
1247                                         $dbw->begin();
1248                                         $this->doUnwatch();
1249                                         $dbw->commit();
1250                                 }
1251                         }
1252
1253                         $this->doRedirect( $this->isRedirect( $text ), $sectionanchor );
1254                 }
1255                 return $good;
1256         }
1257
1258         /**
1259          * Article::doEdit()
1260          *
1261          * Change an existing article or create a new article. Updates RC and all necessary caches,
1262          * optionally via the deferred update array.
1263          *
1264          * $wgUser must be set before calling this function.
1265          *
1266          * @param string $text New text
1267          * @param string $summary Edit summary
1268          * @param integer $flags bitfield:
1269          *      EDIT_NEW
1270          *          Article is known or assumed to be non-existent, create a new one
1271          *      EDIT_UPDATE
1272          *          Article is known or assumed to be pre-existing, update it
1273          *      EDIT_MINOR
1274          *          Mark this edit minor, if the user is allowed to do so
1275          *      EDIT_SUPPRESS_RC
1276          *          Do not log the change in recentchanges
1277          *      EDIT_FORCE_BOT
1278          *          Mark the edit a "bot" edit regardless of user rights
1279          *      EDIT_DEFER_UPDATES
1280          *          Defer some of the updates until the end of index.php
1281          *      EDIT_AUTOSUMMARY
1282          *          Fill in blank summaries with generated text where possible
1283          *
1284          * If neither EDIT_NEW nor EDIT_UPDATE is specified, the status of the article will be detected.
1285          * If EDIT_UPDATE is specified and the article doesn't exist, the function will return false. If
1286          * EDIT_NEW is specified and the article does exist, a duplicate key error will cause an exception
1287          * to be thrown from the Database. These two conditions are also possible with auto-detection due
1288          * to MediaWiki's performance-optimised locking strategy.
1289          *
1290          * @return bool success
1291          */
1292         function doEdit( $text, $summary, $flags = 0 ) {
1293                 global $wgUser, $wgDBtransactions;
1294
1295                 wfProfileIn( __METHOD__ );
1296                 $good = true;
1297
1298                 if ( !($flags & EDIT_NEW) && !($flags & EDIT_UPDATE) ) {
1299                         $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
1300                         if ( $aid ) {
1301                                 $flags |= EDIT_UPDATE;
1302                         } else {
1303                                 $flags |= EDIT_NEW;
1304                         }
1305                 }
1306
1307                 if( !wfRunHooks( 'ArticleSave', array( &$this, &$wgUser, &$text,
1308                         &$summary, $flags & EDIT_MINOR,
1309                         null, null, &$flags ) ) )
1310                 {
1311                         wfDebug( __METHOD__ . ": ArticleSave hook aborted save!\n" );
1312                         wfProfileOut( __METHOD__ );
1313                         return false;
1314                 }
1315
1316                 # Silently ignore EDIT_MINOR if not allowed
1317                 $isminor = ( $flags & EDIT_MINOR ) && $wgUser->isAllowed('minoredit');
1318                 $bot = $wgUser->isAllowed( 'bot' ) || ( $flags & EDIT_FORCE_BOT );
1319
1320                 $oldtext = $this->getContent();
1321                 $oldsize = strlen( $oldtext );
1322
1323                 # Provide autosummaries if one is not provided.
1324                 if ($flags & EDIT_AUTOSUMMARY && $summary == '')
1325                         $summary = $this->getAutosummary( $oldtext, $text, $flags );
1326
1327                 $text = $this->preSaveTransform( $text );
1328                 $newsize = strlen( $text );
1329
1330                 $dbw = wfGetDB( DB_MASTER );
1331                 $now = wfTimestampNow();
1332
1333                 if ( $flags & EDIT_UPDATE ) {
1334                         # Update article, but only if changed.
1335
1336                         # Make sure the revision is either completely inserted or not inserted at all
1337                         if( !$wgDBtransactions ) {
1338                                 $userAbort = ignore_user_abort( true );
1339                         }
1340
1341                         $lastRevision = 0;
1342                         $revisionId = 0;
1343
1344                         if ( 0 != strcmp( $text, $oldtext ) ) {
1345                                 $this->mGoodAdjustment = (int)$this->isCountable( $text )
1346                                   - (int)$this->isCountable( $oldtext );
1347                                 $this->mTotalAdjustment = 0;
1348
1349                                 $lastRevision = $dbw->selectField(
1350                                         'page', 'page_latest', array( 'page_id' => $this->getId() ) );
1351
1352                                 if ( !$lastRevision ) {
1353                                         # Article gone missing
1354                                         wfDebug( __METHOD__.": EDIT_UPDATE specified but article doesn't exist\n" );
1355                                         wfProfileOut( __METHOD__ );
1356                                         return false;
1357                                 }
1358
1359                                 $revision = new Revision( array(
1360                                         'page'       => $this->getId(),
1361                                         'comment'    => $summary,
1362                                         'minor_edit' => $isminor,
1363                                         'text'       => $text
1364                                         ) );
1365
1366                                 $dbw->begin();
1367                                 $revisionId = $revision->insertOn( $dbw );
1368
1369                                 # Update page
1370                                 $ok = $this->updateRevisionOn( $dbw, $revision, $lastRevision );
1371
1372                                 if( !$ok ) {
1373                                         /* Belated edit conflict! Run away!! */
1374                                         $good = false;
1375                                         $dbw->rollback();
1376                                 } else {
1377                                         # Update recentchanges
1378                                         if( !( $flags & EDIT_SUPPRESS_RC ) ) {
1379                                                 $rcid = RecentChange::notifyEdit( $now, $this->mTitle, $isminor, $wgUser, $summary,
1380                                                         $lastRevision, $this->getTimestamp(), $bot, '', $oldsize, $newsize,
1381                                                         $revisionId );
1382
1383                                                 # Mark as patrolled if the user can do so
1384                                                 if( $GLOBALS['wgUseRCPatrol'] && $wgUser->isAllowed( 'autopatrol' ) ) {
1385                                                         RecentChange::markPatrolled( $rcid );
1386                                                         PatrolLog::record( $rcid, true );
1387                                                 }
1388                                         }
1389                                         $wgUser->incEditCount();
1390                                         $dbw->commit();
1391                                 }
1392                         } else {
1393                                 // Keep the same revision ID, but do some updates on it
1394                                 $revisionId = $this->getRevIdFetched();
1395                                 // Update page_touched, this is usually implicit in the page update
1396                                 // Other cache updates are done in onArticleEdit()
1397                                 $this->mTitle->invalidateCache();
1398                         }
1399
1400                         if( !$wgDBtransactions ) {
1401                                 ignore_user_abort( $userAbort );
1402                         }
1403
1404                         if ( $good ) {
1405                                 # Invalidate cache of this article and all pages using this article
1406                                 # as a template. Partly deferred.
1407                                 Article::onArticleEdit( $this->mTitle );
1408
1409                                 # Update links tables, site stats, etc.
1410                                 $changed = ( strcmp( $oldtext, $text ) != 0 );
1411                                 $this->editUpdates( $text, $summary, $isminor, $now, $revisionId, $changed );
1412                         }
1413                 } else {
1414                         # Create new article
1415
1416                         # Set statistics members
1417                         # We work out if it's countable after PST to avoid counter drift
1418                         # when articles are created with {{subst:}}
1419                         $this->mGoodAdjustment = (int)$this->isCountable( $text );
1420                         $this->mTotalAdjustment = 1;
1421
1422                         $dbw->begin();
1423
1424                         # Add the page record; stake our claim on this title!
1425                         # This will fail with a database query exception if the article already exists
1426                         $newid = $this->insertOn( $dbw );
1427
1428                         # Save the revision text...
1429                         $revision = new Revision( array(
1430                                 'page'       => $newid,
1431                                 'comment'    => $summary,
1432                                 'minor_edit' => $isminor,
1433                                 'text'       => $text
1434                                 ) );
1435                         $revisionId = $revision->insertOn( $dbw );
1436
1437                         $this->mTitle->resetArticleID( $newid );
1438
1439                         # Update the page record with revision data
1440                         $this->updateRevisionOn( $dbw, $revision, 0 );
1441
1442                         if( !( $flags & EDIT_SUPPRESS_RC ) ) {
1443                                 $rcid = RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary, $bot,
1444                                   '', strlen( $text ), $revisionId );
1445                                 # Mark as patrolled if the user can
1446                                 if( $GLOBALS['wgUseRCPatrol'] && $wgUser->isAllowed( 'autopatrol' ) ) {
1447                                         RecentChange::markPatrolled( $rcid );
1448                                         PatrolLog::record( $rcid, true );
1449                                 }
1450                         }
1451                         $wgUser->incEditCount();
1452                         $dbw->commit();
1453
1454                         # Update links, etc.
1455                         $this->editUpdates( $text, $summary, $isminor, $now, $revisionId, true );
1456
1457                         # Clear caches
1458                         Article::onArticleCreate( $this->mTitle );
1459
1460                         wfRunHooks( 'ArticleInsertComplete', array( &$this, &$wgUser, $text, $summary,
1461                          $flags & EDIT_MINOR, null, null, &$flags, $revision ) );
1462                 }
1463
1464                 if ( $good && !( $flags & EDIT_DEFER_UPDATES ) ) {
1465                         wfDoUpdates();
1466                 }
1467
1468                 wfRunHooks( 'ArticleSaveComplete', array( &$this, &$wgUser, $text, $summary,
1469                         $flags & EDIT_MINOR, null, null, &$flags, $revision ) );
1470
1471                 wfProfileOut( __METHOD__ );
1472                 return $good;
1473         }
1474
1475         /**
1476          * @deprecated wrapper for doRedirect
1477          */
1478         function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid ) {
1479                 $this->doRedirect( $this->isRedirect( $text ), $sectionanchor );
1480         }
1481
1482         /**
1483          * Output a redirect back to the article.
1484          * This is typically used after an edit.
1485          *
1486          * @param boolean $noRedir Add redirect=no
1487          * @param string $sectionAnchor section to redirect to, including "#"
1488          */
1489         function doRedirect( $noRedir = false, $sectionAnchor = '' ) {
1490                 global $wgOut;
1491                 if ( $noRedir ) {
1492                         $query = 'redirect=no';
1493                 } else {
1494                         $query = '';
1495                 }
1496                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $sectionAnchor );
1497         }
1498
1499         /**
1500          * Mark this particular edit as patrolled
1501          */
1502         function markpatrolled() {
1503                 global $wgOut, $wgRequest, $wgUseRCPatrol, $wgUser;
1504                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1505
1506                 # Check RC patrol config. option
1507                 if( !$wgUseRCPatrol ) {
1508                         $wgOut->errorPage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1509                         return;
1510                 }
1511
1512                 # Check permissions
1513                 if( !$wgUser->isAllowed( 'patrol' ) ) {
1514                         $wgOut->permissionRequired( 'patrol' );
1515                         return;
1516                 }
1517
1518                 # If we haven't been given an rc_id value, we can't do anything
1519                 $rcid = $wgRequest->getVal( 'rcid' );
1520                 if( !$rcid ) {
1521                         $wgOut->errorPage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1522                         return;
1523                 }
1524
1525                 # Handle the 'MarkPatrolled' hook
1526                 if( !wfRunHooks( 'MarkPatrolled', array( $rcid, &$wgUser, false ) ) ) {
1527                         return;
1528                 }
1529
1530                 $return = SpecialPage::getTitleFor( 'Recentchanges' );
1531                 # If it's left up to us, check that the user is allowed to patrol this edit
1532                 # If the user has the "autopatrol" right, then we'll assume there are no
1533                 # other conditions stopping them doing so
1534                 if( !$wgUser->isAllowed( 'autopatrol' ) ) {
1535                         $rc = RecentChange::newFromId( $rcid );
1536                         # Graceful error handling, as we've done before here...
1537                         # (If the recent change doesn't exist, then it doesn't matter whether
1538                         # the user is allowed to patrol it or not; nothing is going to happen
1539                         if( is_object( $rc ) && $wgUser->getName() == $rc->getAttribute( 'rc_user_text' ) ) {
1540                                 # The user made this edit, and can't patrol it
1541                                 # Tell them so, and then back off
1542                                 $wgOut->setPageTitle( wfMsg( 'markedaspatrollederror' ) );
1543                                 $wgOut->addWikiText( wfMsgNoTrans( 'markedaspatrollederror-noautopatrol' ) );
1544                                 $wgOut->returnToMain( false, $return );
1545                                 return;
1546                         }
1547                 }
1548
1549                 # Mark the edit as patrolled
1550                 RecentChange::markPatrolled( $rcid );
1551                 PatrolLog::record( $rcid );
1552                 wfRunHooks( 'MarkPatrolledComplete', array( &$rcid, &$wgUser, false ) );
1553
1554                 # Inform the user
1555                 $wgOut->setPageTitle( wfMsg( 'markedaspatrolled' ) );
1556                 $wgOut->addWikiText( wfMsgNoTrans( 'markedaspatrolledtext' ) );
1557                 $wgOut->returnToMain( false, $return );
1558         }
1559
1560         /**
1561          * User-interface handler for the "watch" action
1562          */
1563
1564         function watch() {
1565
1566                 global $wgUser, $wgOut;
1567
1568                 if ( $wgUser->isAnon() ) {
1569                         $wgOut->showErrorPage( 'watchnologin', 'watchnologintext' );
1570                         return;
1571                 }
1572                 if ( wfReadOnly() ) {
1573                         $wgOut->readOnlyPage();
1574                         return;
1575                 }
1576
1577                 if( $this->doWatch() ) {
1578                         $wgOut->setPagetitle( wfMsg( 'addedwatch' ) );
1579                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
1580
1581                         $link = wfEscapeWikiText( $this->mTitle->getPrefixedText() );
1582                         $text = wfMsg( 'addedwatchtext', $link );
1583                         $wgOut->addWikiText( $text );
1584                 }
1585
1586                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1587         }
1588
1589         /**
1590          * Add this page to $wgUser's watchlist
1591          * @return bool true on successful watch operation
1592          */
1593         function doWatch() {
1594                 global $wgUser;
1595                 if( $wgUser->isAnon() ) {
1596                         return false;
1597                 }
1598
1599                 if (wfRunHooks('WatchArticle', array(&$wgUser, &$this))) {
1600                         $wgUser->addWatch( $this->mTitle );
1601
1602                         return wfRunHooks('WatchArticleComplete', array(&$wgUser, &$this));
1603                 }
1604
1605                 return false;
1606         }
1607
1608         /**
1609          * User interface handler for the "unwatch" action.
1610          */
1611         function unwatch() {
1612
1613                 global $wgUser, $wgOut;
1614
1615                 if ( $wgUser->isAnon() ) {
1616                         $wgOut->showErrorPage( 'watchnologin', 'watchnologintext' );
1617                         return;
1618                 }
1619                 if ( wfReadOnly() ) {
1620                         $wgOut->readOnlyPage();
1621                         return;
1622                 }
1623
1624                 if( $this->doUnwatch() ) {
1625                         $wgOut->setPagetitle( wfMsg( 'removedwatch' ) );
1626                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
1627
1628                         $link = wfEscapeWikiText( $this->mTitle->getPrefixedText() );
1629                         $text = wfMsg( 'removedwatchtext', $link );
1630                         $wgOut->addWikiText( $text );
1631                 }
1632
1633                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1634         }
1635
1636         /**
1637          * Stop watching a page
1638          * @return bool true on successful unwatch
1639          */
1640         function doUnwatch() {
1641                 global $wgUser;
1642                 if( $wgUser->isAnon() ) {
1643                         return false;
1644                 }
1645
1646                 if (wfRunHooks('UnwatchArticle', array(&$wgUser, &$this))) {
1647                         $wgUser->removeWatch( $this->mTitle );
1648
1649                         return wfRunHooks('UnwatchArticleComplete', array(&$wgUser, &$this));
1650                 }
1651
1652                 return false;
1653         }
1654
1655         /**
1656          * action=protect handler
1657          */
1658         function protect() {
1659                 $form = new ProtectionForm( $this );
1660                 $form->execute();
1661         }
1662
1663         /**
1664          * action=unprotect handler (alias)
1665          */
1666         function unprotect() {
1667                 $this->protect();
1668         }
1669
1670         /**
1671          * Update the article's restriction field, and leave a log entry.
1672          *
1673          * @param array $limit set of restriction keys
1674          * @param string $reason
1675          * @return bool true on success
1676          */
1677         function updateRestrictions( $limit = array(), $reason = '', $cascade = 0, $expiry = null ) {
1678                 global $wgUser, $wgRestrictionTypes, $wgContLang;
1679
1680                 $id = $this->mTitle->getArticleID();
1681                 if( !$wgUser->isAllowed( 'protect' ) || wfReadOnly() || $id == 0 ) {
1682                         return false;
1683                 }
1684
1685                 if (!$cascade) {
1686                         $cascade = false;
1687                 }
1688
1689                 // Take this opportunity to purge out expired restrictions
1690                 Title::purgeExpiredRestrictions();
1691
1692                 # FIXME: Same limitations as described in ProtectionForm.php (line 37);
1693                 # we expect a single selection, but the schema allows otherwise.
1694                 $current = array();
1695                 foreach( $wgRestrictionTypes as $action )
1696                         $current[$action] = implode( '', $this->mTitle->getRestrictions( $action ) );
1697
1698                 $current = Article::flattenRestrictions( $current );
1699                 $updated = Article::flattenRestrictions( $limit );
1700
1701                 $changed = ( $current != $updated );
1702                 $changed = $changed || ($this->mTitle->areRestrictionsCascading() != $cascade);
1703                 $changed = $changed || ($this->mTitle->mRestrictionsExpiry != $expiry);
1704                 $protect = ( $updated != '' );
1705
1706                 # If nothing's changed, do nothing
1707                 if( $changed ) {
1708                         global $wgGroupPermissions;
1709                         if( wfRunHooks( 'ArticleProtect', array( &$this, &$wgUser, $limit, $reason ) ) ) {
1710
1711                                 $dbw = wfGetDB( DB_MASTER );
1712
1713                                 $encodedExpiry = Block::encodeExpiry($expiry, $dbw );
1714
1715                                 $expiry_description = '';
1716                                 if ( $encodedExpiry != 'infinity' ) {
1717                                         $expiry_description = ' (' . wfMsgForContent( 'protect-expiring', $wgContLang->timeanddate( $expiry ) ).')';
1718                                 }
1719
1720                                 # Prepare a null revision to be added to the history
1721                                 $modified = $current != '' && $protect;
1722                                 if ( $protect ) {
1723                                         $comment_type = $modified ? 'modifiedarticleprotection' : 'protectedarticle';
1724                                 } else {
1725                                         $comment_type = 'unprotectedarticle';
1726                                 }
1727                                 $comment = $wgContLang->ucfirst( wfMsgForContent( $comment_type, $this->mTitle->getPrefixedText() ) );
1728
1729                                 foreach( $limit as $action => $restrictions ) {
1730                                         # Check if the group level required to edit also can protect pages
1731                                         # Otherwise, people who cannot normally protect can "protect" pages via transclusion
1732                                         $cascade = ( $cascade && isset($wgGroupPermissions[$restrictions]['protect']) && $wgGroupPermissions[$restrictions]['protect'] );
1733                                 }
1734
1735                                 $cascade_description = '';
1736                                 if ($cascade) {
1737                                         $cascade_description = ' ['.wfMsg('protect-summary-cascade').']';
1738                                 }
1739
1740                                 if( $reason )
1741                                         $comment .= ": $reason";
1742                                 if( $protect )
1743                                         $comment .= " [$updated]";
1744                                 if ( $expiry_description && $protect )
1745                                         $comment .= "$expiry_description";
1746                                 if ( $cascade )
1747                                         $comment .= "$cascade_description";
1748
1749                                 $nullRevision = Revision::newNullRevision( $dbw, $id, $comment, true );
1750                                 $nullRevId = $nullRevision->insertOn( $dbw );
1751
1752                                 # Update restrictions table
1753                                 foreach( $limit as $action => $restrictions ) {
1754                                         if ($restrictions != '' ) {
1755                                                 $dbw->replace( 'page_restrictions', array(array('pr_page', 'pr_type')),
1756                                                         array( 'pr_page' => $id, 'pr_type' => $action
1757                                                                 , 'pr_level' => $restrictions, 'pr_cascade' => $cascade ? 1 : 0
1758                                                                 , 'pr_expiry' => $encodedExpiry ), __METHOD__  );
1759                                         } else {
1760                                                 $dbw->delete( 'page_restrictions', array( 'pr_page' => $id,
1761                                                         'pr_type' => $action ), __METHOD__ );
1762                                         }
1763                                 }
1764
1765                                 # Update page record
1766                                 $dbw->update( 'page',
1767                                         array( /* SET */
1768                                                 'page_touched' => $dbw->timestamp(),
1769                                                 'page_restrictions' => '',
1770                                                 'page_latest' => $nullRevId
1771                                         ), array( /* WHERE */
1772                                                 'page_id' => $id
1773                                         ), 'Article::protect'
1774                                 );
1775                                 wfRunHooks( 'ArticleProtectComplete', array( &$this, &$wgUser, $limit, $reason ) );
1776
1777                                 # Update the protection log
1778                                 $log = new LogPage( 'protect' );
1779
1780                                 if( $protect ) {
1781                                         $log->addEntry( $modified ? 'modify' : 'protect', $this->mTitle, trim( $reason . " [$updated]$cascade_description$expiry_description" ) );
1782                                 } else {
1783                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1784                                 }
1785
1786                         } # End hook
1787                 } # End "changed" check
1788
1789                 return true;
1790         }
1791
1792         /**
1793          * Take an array of page restrictions and flatten it to a string
1794          * suitable for insertion into the page_restrictions field.
1795          * @param array $limit
1796          * @return string
1797          * @private
1798          */
1799         function flattenRestrictions( $limit ) {
1800                 if( !is_array( $limit ) ) {
1801                         throw new MWException( 'Article::flattenRestrictions given non-array restriction set' );
1802                 }
1803                 $bits = array();
1804                 ksort( $limit );
1805                 foreach( $limit as $action => $restrictions ) {
1806                         if( $restrictions != '' ) {
1807                                 $bits[] = "$action=$restrictions";
1808                         }
1809                 }
1810                 return implode( ':', $bits );
1811         }
1812
1813         /*
1814          * UI entry point for page deletion
1815          */
1816         function delete() {
1817                 global $wgUser, $wgOut, $wgRequest;
1818                 $confirm = $wgRequest->wasPosted() &&
1819                         $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
1820                 $reason = $wgRequest->getText( 'wpReason' );
1821
1822                 # This code desperately needs to be totally rewritten
1823
1824                 # Check permissions
1825                 if( $wgUser->isAllowed( 'delete' ) ) {
1826                         if( $wgUser->isBlocked( !$confirm ) ) {
1827                                 $wgOut->blockedPage();
1828                                 return;
1829                         }
1830                 } else {
1831                         $wgOut->permissionRequired( 'delete' );
1832                         return;
1833                 }
1834
1835                 if( wfReadOnly() ) {
1836                         $wgOut->readOnlyPage();
1837                         return;
1838                 }
1839
1840                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1841
1842                 # Better double-check that it hasn't been deleted yet!
1843                 $dbw = wfGetDB( DB_MASTER );
1844                 $conds = $this->mTitle->pageCond();
1845                 $latest = $dbw->selectField( 'page', 'page_latest', $conds, __METHOD__ );
1846                 if ( $latest === false ) {
1847                         $wgOut->showFatalError( wfMsg( 'cannotdelete' ) );
1848                         return;
1849                 }
1850
1851                 if( $confirm ) {
1852                         $this->doDelete( $reason );
1853                         if( $wgRequest->getCheck( 'wpWatch' ) ) {
1854                                 $this->doWatch();
1855                         } elseif( $this->mTitle->userIsWatching() ) {
1856                                 $this->doUnwatch();
1857                         }
1858                         return;
1859                 }
1860
1861                 # determine whether this page has earlier revisions
1862                 # and insert a warning if it does
1863                 $maxRevisions = 20;
1864                 $authors = $this->getLastNAuthors( $maxRevisions, $latest );
1865
1866                 if( count( $authors ) > 1 && !$confirm ) {
1867                         $skin=$wgUser->getSkin();
1868                         $wgOut->addHTML( '<strong>' . wfMsg( 'historywarning' ) . ' ' . $skin->historyLink() . '</strong>' );
1869                 }
1870
1871                 # If a single user is responsible for all revisions, find out who they are
1872                 if ( count( $authors ) == $maxRevisions ) {
1873                         // Query bailed out, too many revisions to find out if they're all the same
1874                         $authorOfAll = false;
1875                 } else {
1876                         $authorOfAll = reset( $authors );
1877                         foreach ( $authors as $author ) {
1878                                 if ( $authorOfAll != $author ) {
1879                                         $authorOfAll = false;
1880                                         break;
1881                                 }
1882                         }
1883                 }
1884                 # Fetch article text
1885                 $rev = Revision::newFromTitle( $this->mTitle );
1886
1887                 if( !is_null( $rev ) ) {
1888                         # if this is a mini-text, we can paste part of it into the deletion reason
1889                         $text = $rev->getText();
1890
1891                         #if this is empty, an earlier revision may contain "useful" text
1892                         $blanked = false;
1893                         if( $text == '' ) {
1894                                 $prev = $rev->getPrevious();
1895                                 if( $prev ) {
1896                                         $text = $prev->getText();
1897                                         $blanked = true;
1898                                 }
1899                         }
1900
1901                         $length = strlen( $text );
1902
1903                         # this should not happen, since it is not possible to store an empty, new
1904                         # page. Let's insert a standard text in case it does, though
1905                         if( $length == 0 && $reason === '' ) {
1906                                 $reason = wfMsgForContent( 'exblank' );
1907                         }
1908
1909                         if( $reason === '' ) {
1910                                 # comment field=255, let's grep the first 150 to have some user
1911                                 # space left
1912                                 global $wgContLang;
1913                                 $text = $wgContLang->truncate( $text, 150, '...' );
1914
1915                                 # let's strip out newlines
1916                                 $text = preg_replace( "/[\n\r]/", '', $text );
1917
1918                                 if( !$blanked ) {
1919                                         if( $authorOfAll === false ) {
1920                                                 $reason = wfMsgForContent( 'excontent', $text );
1921                                         } else {
1922                                                 $reason = wfMsgForContent( 'excontentauthor', $text, $authorOfAll );
1923                                         }
1924                                 } else {
1925                                         $reason = wfMsgForContent( 'exbeforeblank', $text );
1926                                 }
1927                         }
1928                 }
1929
1930                 return $this->confirmDelete( '', $reason );
1931         }
1932
1933         /**
1934          * Get the last N authors
1935          * @param int $num Number of revisions to get
1936          * @param string $revLatest The latest rev_id, selected from the master (optional)
1937          * @return array Array of authors, duplicates not removed
1938          */
1939         function getLastNAuthors( $num, $revLatest = 0 ) {
1940                 wfProfileIn( __METHOD__ );
1941
1942                 // First try the slave
1943                 // If that doesn't have the latest revision, try the master
1944                 $continue = 2;
1945                 $db = wfGetDB( DB_SLAVE );
1946                 do {
1947                         $res = $db->select( array( 'page', 'revision' ),
1948                                 array( 'rev_id', 'rev_user_text' ),
1949                                 array(
1950                                         'page_namespace' => $this->mTitle->getNamespace(),
1951                                         'page_title' => $this->mTitle->getDBkey(),
1952                                         'rev_page = page_id'
1953                                 ), __METHOD__, $this->getSelectOptions( array(
1954                                         'ORDER BY' => 'rev_timestamp DESC',
1955                                         'LIMIT' => $num
1956                                 ) )
1957                         );
1958                         if ( !$res ) {
1959                                 wfProfileOut( __METHOD__ );
1960                                 return array();
1961                         }
1962                         $row = $db->fetchObject( $res );
1963                         if ( $continue == 2 && $revLatest && $row->rev_id != $revLatest ) {
1964                                 $db = wfGetDB( DB_MASTER );
1965                                 $continue--;
1966                         } else {
1967                                 $continue = 0;
1968                         }
1969                 } while ( $continue );
1970
1971                 $authors = array( $row->rev_user_text );
1972                 while ( $row = $db->fetchObject( $res ) ) {
1973                         $authors[] = $row->rev_user_text;
1974                 }
1975                 wfProfileOut( __METHOD__ );
1976                 return $authors;
1977         }
1978
1979         /**
1980          * Output deletion confirmation dialog
1981          */
1982         function confirmDelete( $par, $reason ) {
1983                 global $wgOut, $wgUser;
1984
1985                 wfDebug( "Article::confirmDelete\n" );
1986
1987                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1988                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1989                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1990                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1991
1992                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1993
1994                 $confirm = htmlspecialchars( wfMsg( 'deletepage' ) );
1995                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1996                 $token = htmlspecialchars( $wgUser->editToken() );
1997                 $watch = Xml::checkLabel( wfMsg( 'watchthis' ), 'wpWatch', 'wpWatch', $wgUser->getBoolOption( 'watchdeletion' ) || $this->mTitle->userIsWatching(), array( 'tabindex' => '2' ) );
1998
1999                 $wgOut->addHTML( "
2000 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
2001         <table border='0'>
2002                 <tr>
2003                         <td align='right'>
2004                                 <label for='wpReason'>{$delcom}:</label>
2005                         </td>
2006                         <td align='left'>
2007                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" tabindex=\"1\" />
2008                         </td>
2009                 </tr>
2010                 <tr>
2011                         <td>&nbsp;</td>
2012                         <td>$watch</td>
2013                 </tr>
2014                 <tr>
2015                         <td>&nbsp;</td>
2016                         <td>
2017                                 <input type='submit' name='wpConfirmB' id='wpConfirmB' value=\"{$confirm}\" tabindex=\"3\" />
2018                         </td>
2019                 </tr>
2020         </table>
2021         <input type='hidden' name='wpEditToken' value=\"{$token}\" />
2022 </form>\n" );
2023
2024                 $wgOut->returnToMain( false );
2025
2026                 $this->showLogExtract( $wgOut );
2027         }
2028
2029
2030         /**
2031          * Show relevant lines from the deletion log
2032          */
2033         function showLogExtract( $out ) {
2034                 $out->addHtml( '<h2>' . htmlspecialchars( LogPage::logName( 'delete' ) ) . '</h2>' );
2035                 $logViewer = new LogViewer(
2036                         new LogReader(
2037                                 new FauxRequest(
2038                                         array( 'page' => $this->mTitle->getPrefixedText(),
2039                                                'type' => 'delete' ) ) ) );
2040                 $logViewer->showList( $out );
2041         }
2042
2043
2044         /**
2045          * Perform a deletion and output success or failure messages
2046          */
2047         function doDelete( $reason ) {
2048                 global $wgOut, $wgUser;
2049                 wfDebug( __METHOD__."\n" );
2050
2051                 if (wfRunHooks('ArticleDelete', array(&$this, &$wgUser, &$reason))) {
2052                         if ( $this->doDeleteArticle( $reason ) ) {
2053                                 $deleted = wfEscapeWikiText( $this->mTitle->getPrefixedText() );
2054
2055                                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
2056                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
2057
2058                                 $loglink = '[[Special:Log/delete|' . wfMsg( 'deletionlog' ) . ']]';
2059                                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
2060
2061                                 $wgOut->addWikiText( $text );
2062                                 $wgOut->returnToMain( false );
2063                                 wfRunHooks('ArticleDeleteComplete', array(&$this, &$wgUser, $reason));
2064                         } else {
2065                                 $wgOut->showFatalError( wfMsg( 'cannotdelete' ) );
2066                         }
2067                 }
2068         }
2069
2070         /**
2071          * Back-end article deletion
2072          * Deletes the article with database consistency, writes logs, purges caches
2073          * Returns success
2074          */
2075         function doDeleteArticle( $reason ) {
2076                 global $wgUseSquid, $wgDeferredUpdateList;
2077                 global $wgUseTrackbacks;
2078
2079                 wfDebug( __METHOD__."\n" );
2080
2081                 $dbw = wfGetDB( DB_MASTER );
2082                 $ns = $this->mTitle->getNamespace();
2083                 $t = $this->mTitle->getDBkey();
2084                 $id = $this->mTitle->getArticleID();
2085
2086                 if ( $t == '' || $id == 0 ) {
2087                         return false;
2088                 }
2089
2090                 $u = new SiteStatsUpdate( 0, 1, -(int)$this->isCountable( $this->getContent() ), -1 );
2091                 array_push( $wgDeferredUpdateList, $u );
2092
2093                 // For now, shunt the revision data into the archive table.
2094                 // Text is *not* removed from the text table; bulk storage
2095                 // is left intact to avoid breaking block-compression or
2096                 // immutable storage schemes.
2097                 //
2098                 // For backwards compatibility, note that some older archive
2099                 // table entries will have ar_text and ar_flags fields still.
2100                 //
2101                 // In the future, we may keep revisions and mark them with
2102                 // the rev_deleted field, which is reserved for this purpose.
2103                 $dbw->insertSelect( 'archive', array( 'page', 'revision' ),
2104                         array(
2105                                 'ar_namespace'  => 'page_namespace',
2106                                 'ar_title'      => 'page_title',
2107                                 'ar_comment'    => 'rev_comment',
2108                                 'ar_user'       => 'rev_user',
2109                                 'ar_user_text'  => 'rev_user_text',
2110                                 'ar_timestamp'  => 'rev_timestamp',
2111                                 'ar_minor_edit' => 'rev_minor_edit',
2112                                 'ar_rev_id'     => 'rev_id',
2113                                 'ar_text_id'    => 'rev_text_id',
2114                                 'ar_text'       => '\'\'', // Be explicit to appease
2115                                 'ar_flags'      => '\'\'', // MySQL's "strict mode"...
2116                                 'ar_len'                => 'rev_len',
2117                                 'ar_page'       => $id
2118                         ), array(
2119                                 'page_id' => $id,
2120                                 'page_id = rev_page'
2121                         ), __METHOD__
2122                 );
2123
2124                 # Delete restrictions for it
2125                 $dbw->delete( 'page_restrictions', array ( 'pr_page' => $id ), __METHOD__ );
2126
2127                 # Now that it's safely backed up, delete it
2128                 $dbw->delete( 'page', array( 'page_id' => $id ), __METHOD__);
2129
2130                 # If using cascading deletes, we can skip some explicit deletes
2131                 if ( !$dbw->cascadingDeletes() ) {
2132
2133                         $dbw->delete( 'revision', array( 'rev_page' => $id ), __METHOD__ );
2134
2135                         if ($wgUseTrackbacks)
2136                                 $dbw->delete( 'trackbacks', array( 'tb_page' => $id ), __METHOD__ );
2137
2138                         # Delete outgoing links
2139                         $dbw->delete( 'pagelinks', array( 'pl_from' => $id ) );
2140                         $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
2141                         $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
2142                         $dbw->delete( 'templatelinks', array( 'tl_from' => $id ) );
2143                         $dbw->delete( 'externallinks', array( 'el_from' => $id ) );
2144                         $dbw->delete( 'langlinks', array( 'll_from' => $id ) );
2145                         $dbw->delete( 'redirect', array( 'rd_from' => $id ) );
2146                 }
2147
2148                 # If using cleanup triggers, we can skip some manual deletes
2149                 if ( !$dbw->cleanupTriggers() ) {
2150
2151                         # Clean up recentchanges entries...
2152                         $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), __METHOD__ );
2153                 }
2154
2155                 # Clear caches
2156                 Article::onArticleDelete( $this->mTitle );
2157
2158                 # Log the deletion
2159                 $log = new LogPage( 'delete' );
2160                 $log->addEntry( 'delete', $this->mTitle, $reason );
2161
2162                 # Clear the cached article id so the interface doesn't act like we exist
2163                 $this->mTitle->resetArticleID( 0 );
2164                 $this->mTitle->mArticleID = 0;
2165                 return true;
2166         }
2167
2168         /**
2169          * Roll back the most recent consecutive set of edits to a page
2170          * from the same user; fails if there are no eligible edits to
2171          * roll back to, e.g. user is the sole contributor
2172          *
2173          * @param string $fromP - Name of the user whose edits to rollback.
2174          * @param string $summary - Custom summary. Set to default summary if empty.
2175          * @param string $token - Rollback token.
2176          * @param bool $bot - If true, mark all reverted edits as bot.
2177          *
2178          * @param array $resultDetails contains result-specific dict of additional values
2179          *    ALREADY_ROLLED : 'current' (rev)
2180          *    SUCCESS        : 'summary' (str), 'current' (rev), 'target' (rev)
2181          *
2182          * @return self::SUCCESS on succes, self::* on failure
2183          */
2184         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails ) {
2185                 global $wgUser, $wgUseRCPatrol;
2186                 $resultDetails = null;
2187
2188                 if( $wgUser->isAllowed( 'rollback' ) ) {
2189                         if( $wgUser->isBlocked() ) {
2190                                 return self::BLOCKED;
2191                         }
2192                 } else {
2193                         return self::PERM_DENIED;
2194                 }
2195
2196                 if ( wfReadOnly() ) {
2197                         return self::READONLY;
2198                 }
2199                 if( !$wgUser->matchEditToken( $token, array( $this->mTitle->getPrefixedText(), $fromP ) ) )
2200                         return self::BAD_TOKEN;
2201
2202                 $dbw = wfGetDB( DB_MASTER );
2203
2204                 # Get the last editor
2205                 $current = Revision::newFromTitle( $this->mTitle );
2206                 if( is_null( $current ) ) {
2207                         # Something wrong... no page?
2208                         return self::BAD_TITLE;
2209                 }
2210
2211                 $from = str_replace( '_', ' ', $fromP );
2212                 if( $from != $current->getUserText() ) {
2213                         $resultDetails = array( 'current' => $current );
2214                         return self::ALREADY_ROLLED;
2215                 }
2216
2217                 # Get the last edit not by this guy
2218                 $user = intval( $current->getUser() );
2219                 $user_text = $dbw->addQuotes( $current->getUserText() );
2220                 $s = $dbw->selectRow( 'revision',
2221                         array( 'rev_id', 'rev_timestamp' ),
2222                         array(
2223                                 'rev_page' => $current->getPage(),
2224                                 "rev_user <> {$user} OR rev_user_text <> {$user_text}"
2225                         ), __METHOD__,
2226                         array(
2227                                 'USE INDEX' => 'page_timestamp',
2228                                 'ORDER BY'  => 'rev_timestamp DESC' )
2229                         );
2230                 if( $s === false ) {
2231                         # Something wrong
2232                         return self::ONLY_AUTHOR;
2233                 }
2234
2235                 $set = array();
2236                 if ( $bot ) {
2237                         # Mark all reverted edits as bot
2238                         $set['rc_bot'] = 1;
2239                 }
2240                 if ( $wgUseRCPatrol ) {
2241                         # Mark all reverted edits as patrolled
2242                         $set['rc_patrolled'] = 1;
2243                 }
2244
2245                 if ( $set ) {
2246                         $dbw->update( 'recentchanges', $set,
2247                                         array( /* WHERE */
2248                                                 'rc_cur_id' => $current->getPage(),
2249                                                 'rc_user_text' => $current->getUserText(),
2250                                                 "rc_timestamp > '{$s->rev_timestamp}'",
2251                                         ), __METHOD__
2252                                 );
2253                 }
2254
2255                 # Get the edit summary
2256                 $target = Revision::newFromId( $s->rev_id );
2257                 if( empty( $summary ) )
2258                         $summary = wfMsgForContent( 'revertpage', $target->getUserText(), $from );
2259
2260                 # Save
2261                 $flags = EDIT_UPDATE | EDIT_MINOR;
2262                 if( $bot )
2263                         $flags |= EDIT_FORCE_BOT;
2264                 $this->doEdit( $target->getText(), $summary, $flags );
2265
2266                 $resultDetails = array(
2267                         'summary' => $summary,
2268                         'current' => $current,
2269                         'target' => $target,
2270                 );
2271                 return self::SUCCESS;
2272         }
2273
2274         /**
2275          * User interface for rollback operations
2276          */
2277         function rollback() {
2278                 global $wgUser, $wgOut, $wgRequest, $wgUseRCPatrol;
2279
2280                 $details = null;
2281                 $result = $this->doRollback(
2282                         $wgRequest->getVal( 'from' ),
2283                         $wgRequest->getText( 'summary' ),
2284                         $wgRequest->getVal( 'token' ),
2285                         $wgRequest->getBool( 'bot' ),
2286                         $details
2287                 );
2288
2289                 switch( $result ) {
2290                         case self::BLOCKED:
2291                                 $wgOut->blockedPage();
2292                                 break;
2293                         case self::PERM_DENIED:
2294                                 $wgOut->permissionRequired( 'rollback' );
2295                                 break;
2296                         case self::READONLY:
2297                                 $wgOut->readOnlyPage( $this->getContent() );
2298                                 break;
2299                         case self::BAD_TOKEN:
2300                                 $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
2301                                 $wgOut->addWikiText( wfMsg( 'sessionfailure' ) );
2302                                 break;
2303                         case self::BAD_TITLE:
2304                                 $wgOut->addHtml( wfMsg( 'notanarticle' ) );
2305                                 break;
2306                         case self::ALREADY_ROLLED:
2307                                 $current = $details['current'];
2308                                 $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
2309                                 $wgOut->addWikiText(
2310                                         wfMsg( 'alreadyrolled',
2311                                                 htmlspecialchars( $this->mTitle->getPrefixedText() ),
2312                                                 htmlspecialchars( $wgRequest->getVal( 'from' ) ),
2313                                                 htmlspecialchars( $current->getUserText() )
2314                                         )
2315                                 );
2316                                 if( $current->getComment() != '' ) {
2317                                         $wgOut->addHtml( wfMsg( 'editcomment',
2318                                                 $wgUser->getSkin()->formatComment( $current->getComment() ) ) );
2319                                 }
2320                                 break;
2321                         case self::ONLY_AUTHOR:
2322                                 $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
2323                                 $wgOut->addHtml( wfMsg( 'cantrollback' ) );
2324                                 break;
2325                         case self::SUCCESS:
2326                                 $current = $details['current'];
2327                                 $target = $details['target'];
2328                                 $wgOut->setPageTitle( wfMsg( 'actioncomplete' ) );
2329                                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2330                                 $old = $wgUser->getSkin()->userLink( $current->getUser(), $current->getUserText() )
2331                                         . $wgUser->getSkin()->userToolLinks( $current->getUser(), $current->getUserText() );
2332                                 $new = $wgUser->getSkin()->userLink( $target->getUser(), $target->getUserText() )
2333                                         . $wgUser->getSkin()->userToolLinks( $target->getUser(), $target->getUserText() );
2334                                 $wgOut->addHtml( wfMsgExt( 'rollback-success', array( 'parse', 'replaceafter' ), $old, $new ) );
2335                                 $wgOut->returnToMain( false, $this->mTitle );
2336                                 break;
2337                         default:
2338                                 throw new MWException( __METHOD__ . ": Unknown return value `{$retval}`" );
2339                 }
2340
2341         }
2342
2343
2344         /**
2345          * Do standard deferred updates after page view
2346          * @private
2347          */
2348         function viewUpdates() {
2349                 global $wgDeferredUpdateList;
2350
2351                 if ( 0 != $this->getID() ) {
2352                         global $wgDisableCounters;
2353                         if( !$wgDisableCounters ) {
2354                                 Article::incViewCount( $this->getID() );
2355                                 $u = new SiteStatsUpdate( 1, 0, 0 );
2356                                 array_push( $wgDeferredUpdateList, $u );
2357                         }
2358                 }
2359
2360                 # Update newtalk / watchlist notification status
2361                 global $wgUser;
2362                 $wgUser->clearNotification( $this->mTitle );
2363         }
2364
2365         /**
2366          * Do standard deferred updates after page edit.
2367          * Update links tables, site stats, search index and message cache.
2368          * Every 1000th edit, prune the recent changes table.
2369          *
2370          * @private
2371          * @param $text New text of the article
2372          * @param $summary Edit summary
2373          * @param $minoredit Minor edit
2374          * @param $timestamp_of_pagechange Timestamp associated with the page change
2375          * @param $newid rev_id value of the new revision
2376          * @param $changed Whether or not the content actually changed
2377          */
2378         function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange, $newid, $changed = true ) {
2379                 global $wgDeferredUpdateList, $wgMessageCache, $wgUser, $wgParser;
2380
2381                 wfProfileIn( __METHOD__ );
2382
2383                 # Parse the text
2384                 $options = new ParserOptions;
2385                 $options->setTidy(true);
2386                 $poutput = $wgParser->parse( $text, $this->mTitle, $options, true, true, $newid );
2387
2388                 # Save it to the parser cache
2389                 $parserCache =& ParserCache::singleton();
2390                 $parserCache->save( $poutput, $this, $wgUser );
2391
2392                 # Update the links tables
2393                 $u = new LinksUpdate( $this->mTitle, $poutput );
2394                 $u->doUpdate();
2395
2396                 if ( wfRunHooks( 'ArticleEditUpdatesDeleteFromRecentchanges', array( &$this ) ) ) {
2397                         wfSeedRandom();
2398                         if ( 0 == mt_rand( 0, 99 ) ) {
2399                                 # Periodically flush old entries from the recentchanges table.
2400                                 global $wgRCMaxAge;
2401
2402                                 $dbw = wfGetDB( DB_MASTER );
2403                                 $cutoff = $dbw->timestamp( time() - $wgRCMaxAge );
2404                                 $recentchanges = $dbw->tableName( 'recentchanges' );
2405                                 $sql = "DELETE FROM $recentchanges WHERE rc_timestamp < '{$cutoff}'";
2406                                 $dbw->query( $sql );
2407                         }
2408                 }
2409
2410                 $id = $this->getID();
2411                 $title = $this->mTitle->getPrefixedDBkey();
2412                 $shortTitle = $this->mTitle->getDBkey();
2413
2414                 if ( 0 == $id ) {
2415                         wfProfileOut( __METHOD__ );
2416                         return;
2417                 }
2418
2419                 $u = new SiteStatsUpdate( 0, 1, $this->mGoodAdjustment, $this->mTotalAdjustment );
2420                 array_push( $wgDeferredUpdateList, $u );
2421                 $u = new SearchUpdate( $id, $title, $text );
2422                 array_push( $wgDeferredUpdateList, $u );
2423
2424                 # If this is another user's talk page, update newtalk
2425                 # Don't do this if $changed = false otherwise some idiot can null-edit a
2426                 # load of user talk pages and piss people off, nor if it's a minor edit
2427                 # by a properly-flagged bot.
2428                 if( $this->mTitle->getNamespace() == NS_USER_TALK && $shortTitle != $wgUser->getTitleKey() && $changed
2429                         && !($minoredit && $wgUser->isAllowed('nominornewtalk') ) ) {
2430                         if (wfRunHooks('ArticleEditUpdateNewTalk', array(&$this)) ) {
2431                                 $other = User::newFromName( $shortTitle );
2432                                 if( is_null( $other ) && User::isIP( $shortTitle ) ) {
2433                                         // An anonymous user
2434                                         $other = new User();
2435                                         $other->setName( $shortTitle );
2436                                 }
2437                                 if( $other ) {
2438                                         $other->setNewtalk( true );
2439                                 }
2440                         }
2441                 }
2442
2443                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
2444                         $wgMessageCache->replace( $shortTitle, $text );
2445                 }
2446
2447                 wfProfileOut( __METHOD__ );
2448         }
2449
2450         /**
2451          * Perform article updates on a special page creation.
2452          *
2453          * @param Revision $rev
2454          *
2455          * @todo This is a shitty interface function. Kill it and replace the
2456          * other shitty functions like editUpdates and such so it's not needed
2457          * anymore.
2458          */
2459         function createUpdates( $rev ) {
2460                 $this->mGoodAdjustment = $this->isCountable( $rev->getText() );
2461                 $this->mTotalAdjustment = 1;
2462                 $this->editUpdates( $rev->getText(), $rev->getComment(),
2463                         $rev->isMinor(), wfTimestamp(), $rev->getId(), true );
2464         }
2465
2466         /**
2467          * Generate the navigation links when browsing through an article revisions
2468          * It shows the information as:
2469          *   Revision as of \<date\>; view current revision
2470          *   \<- Previous version | Next Version -\>
2471          *
2472          * @private
2473          * @param string $oldid         Revision ID of this article revision
2474          */
2475         function setOldSubtitle( $oldid=0 ) {
2476                 global $wgLang, $wgOut, $wgUser;
2477
2478                 if ( !wfRunHooks( 'DisplayOldSubtitle', array(&$this, &$oldid) ) ) {
2479                                 return;
2480                 }
2481
2482                 $revision = Revision::newFromId( $oldid );
2483
2484                 $current = ( $oldid == $this->mLatest );
2485                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
2486                 $sk = $wgUser->getSkin();
2487                 $lnk = $current
2488                         ? wfMsg( 'currentrevisionlink' )
2489                         : $lnk = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
2490                 $curdiff = $current
2491                         ? wfMsg( 'diff' )
2492                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'diff' ), 'diff=cur&oldid='.$oldid );
2493                 $prev = $this->mTitle->getPreviousRevisionID( $oldid ) ;
2494                 $prevlink = $prev
2495                         ? $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid )
2496                         : wfMsg( 'previousrevision' );
2497                 $prevdiff = $prev
2498                         ? $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'diff' ), 'diff=prev&oldid='.$oldid )
2499                         : wfMsg( 'diff' );
2500                 $nextlink = $current
2501                         ? wfMsg( 'nextrevision' )
2502                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
2503                 $nextdiff = $current
2504                         ? wfMsg( 'diff' )
2505                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'diff' ), 'diff=next&oldid='.$oldid );
2506
2507                 $userlinks = $sk->userLink( $revision->getUser(), $revision->getUserText() )
2508                                                 . $sk->userToolLinks( $revision->getUser(), $revision->getUserText() );
2509
2510                 $m = wfMsg( 'revision-info-current' );
2511                 $infomsg = $current && !wfEmptyMsg( 'revision-info-current', $m ) && $m != '-'
2512                         ? 'revision-info-current'
2513                         : 'revision-info';
2514
2515                 $r = "\n\t\t\t\t<div id=\"mw-{$infomsg}\">" . wfMsg( $infomsg, $td, $userlinks ) . "</div>\n" .
2516                      "\n\t\t\t\t<div id=\"mw-revision-nav\">" . wfMsg( 'revision-nav', $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff ) . "</div>\n\t\t\t";
2517                 $wgOut->setSubtitle( $r );
2518         }
2519
2520         /**
2521          * This function is called right before saving the wikitext,
2522          * so we can do things like signatures and links-in-context.
2523          *
2524          * @param string $text
2525          */
2526         function preSaveTransform( $text ) {
2527                 global $wgParser, $wgUser;
2528                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
2529         }
2530
2531         /* Caching functions */
2532
2533         /**
2534          * checkLastModified returns true if it has taken care of all
2535          * output to the client that is necessary for this request.
2536          * (that is, it has sent a cached version of the page)
2537          */
2538         function tryFileCache() {
2539                 static $called = false;
2540                 if( $called ) {
2541                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
2542                         return;
2543                 }
2544                 $called = true;
2545                 if($this->isFileCacheable()) {
2546                         $touched = $this->mTouched;
2547                         $cache = new HTMLFileCache( $this->mTitle );
2548                         if($cache->isFileCacheGood( $touched )) {
2549                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
2550                                 $cache->loadFromFileCache();
2551                                 return true;
2552                         } else {
2553                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
2554                                 ob_start( array(&$cache, 'saveToFileCache' ) );
2555                         }
2556                 } else {
2557                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
2558                 }
2559         }
2560
2561         /**
2562          * Check if the page can be cached
2563          * @return bool
2564          */
2565         function isFileCacheable() {
2566                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest, $wgLang, $wgContLang;
2567                 $action    = $wgRequest->getVal( 'action'    );
2568                 $oldid     = $wgRequest->getVal( 'oldid'     );
2569                 $diff      = $wgRequest->getVal( 'diff'      );
2570                 $redirect  = $wgRequest->getVal( 'redirect'  );
2571                 $printable = $wgRequest->getVal( 'printable' );
2572                 $page      = $wgRequest->getVal( 'page' );
2573
2574                 //check for non-standard user language; this covers uselang,
2575                 //and extensions for auto-detecting user language.
2576                 $ulang     = $wgLang->getCode();
2577                 $clang     = $wgContLang->getCode();
2578
2579                 $cacheable = $wgUseFileCache
2580                         && (!$wgShowIPinHeader)
2581                         && ($this->getID() != 0)
2582                         && ($wgUser->isAnon())
2583                         && (!$wgUser->getNewtalk())
2584                         && ($this->mTitle->getNamespace() != NS_SPECIAL )
2585                         && (empty( $action ) || $action == 'view')
2586                         && (!isset($oldid))
2587                         && (!isset($diff))
2588                         && (!isset($redirect))
2589                         && (!isset($printable))
2590                         && !isset($page)
2591                         && (!$this->mRedirectedFrom)
2592                         && ($ulang === $clang);
2593
2594                 if ( $cacheable ) {
2595                         //extension may have reason to disable file caching on some pages.
2596                         $cacheable = wfRunHooks( 'IsFileCacheable', array( $this ) );
2597                 }
2598
2599                 return $cacheable;
2600         }
2601
2602         /**
2603          * Loads page_touched and returns a value indicating if it should be used
2604          *
2605          */
2606         function checkTouched() {
2607                 if( !$this->mDataLoaded ) {
2608                         $this->loadPageData();
2609                 }
2610                 return !$this->mIsRedirect;
2611         }
2612
2613         /**
2614          * Get the page_touched field
2615          */
2616         function getTouched() {
2617                 # Ensure that page data has been loaded
2618                 if( !$this->mDataLoaded ) {
2619                         $this->loadPageData();
2620                 }
2621                 return $this->mTouched;
2622         }
2623
2624         /**
2625          * Get the page_latest field
2626          */
2627         function getLatest() {
2628                 if ( !$this->mDataLoaded ) {
2629                         $this->loadPageData();
2630                 }
2631                 return $this->mLatest;
2632         }
2633
2634         /**
2635          * Edit an article without doing all that other stuff
2636          * The article must already exist; link tables etc
2637          * are not updated, caches are not flushed.
2638          *
2639          * @param string $text text submitted
2640          * @param string $comment comment submitted
2641          * @param bool $minor whereas it's a minor modification
2642          */
2643         function quickEdit( $text, $comment = '', $minor = 0 ) {
2644                 wfProfileIn( __METHOD__ );
2645
2646                 $dbw = wfGetDB( DB_MASTER );
2647                 $dbw->begin();
2648                 $revision = new Revision( array(
2649                         'page'       => $this->getId(),
2650                         'text'       => $text,
2651                         'comment'    => $comment,
2652                         'minor_edit' => $minor ? 1 : 0,
2653                         ) );
2654                 $revision->insertOn( $dbw );
2655                 $this->updateRevisionOn( $dbw, $revision );
2656                 $dbw->commit();
2657
2658                 wfProfileOut( __METHOD__ );
2659         }
2660
2661         /**
2662          * Used to increment the view counter
2663          *
2664          * @static
2665          * @param integer $id article id
2666          */
2667         function incViewCount( $id ) {
2668                 $id = intval( $id );
2669                 global $wgHitcounterUpdateFreq, $wgDBtype;
2670
2671                 $dbw = wfGetDB( DB_MASTER );
2672                 $pageTable = $dbw->tableName( 'page' );
2673                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
2674                 $acchitsTable = $dbw->tableName( 'acchits' );
2675
2676                 if( $wgHitcounterUpdateFreq <= 1 ) {
2677                         $dbw->query( "UPDATE $pageTable SET page_counter = page_counter + 1 WHERE page_id = $id" );
2678                         return;
2679                 }
2680
2681                 # Not important enough to warrant an error page in case of failure
2682                 $oldignore = $dbw->ignoreErrors( true );
2683
2684                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2685
2686                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2687                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2688                         # Most of the time (or on SQL errors), skip row count check
2689                         $dbw->ignoreErrors( $oldignore );
2690                         return;
2691                 }
2692
2693                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2694                 $row = $dbw->fetchObject( $res );
2695                 $rown = intval( $row->n );
2696                 if( $rown >= $wgHitcounterUpdateFreq ){
2697                         wfProfileIn( 'Article::incViewCount-collect' );
2698                         $old_user_abort = ignore_user_abort( true );
2699
2700                         if ($wgDBtype == 'mysql')
2701                                 $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2702                         $tabletype = $wgDBtype == 'mysql' ? "ENGINE=HEAP " : '';
2703                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable $tabletype AS ".
2704                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2705                                 'GROUP BY hc_id');
2706                         $dbw->query("DELETE FROM $hitcounterTable");
2707                         if ($wgDBtype == 'mysql') {
2708                                 $dbw->query('UNLOCK TABLES');
2709                                 $dbw->query("UPDATE $pageTable,$acchitsTable SET page_counter=page_counter + hc_n ".
2710                                         'WHERE page_id = hc_id');
2711                         }
2712                         else {
2713                                 $dbw->query("UPDATE $pageTable SET page_counter=page_counter + hc_n ".
2714                                         "FROM $acchitsTable WHERE page_id = hc_id");
2715                         }
2716                         $dbw->query("DROP TABLE $acchitsTable");
2717
2718                         ignore_user_abort( $old_user_abort );
2719                         wfProfileOut( 'Article::incViewCount-collect' );
2720                 }
2721                 $dbw->ignoreErrors( $oldignore );
2722         }
2723
2724         /**#@+
2725          * The onArticle*() functions are supposed to be a kind of hooks
2726          * which should be called whenever any of the specified actions
2727          * are done.
2728          *
2729          * This is a good place to put code to clear caches, for instance.
2730          *
2731          * This is called on page move and undelete, as well as edit
2732          * @static
2733          * @param $title_obj a title object
2734          */
2735
2736         static function onArticleCreate($title) {
2737                 # The talk page isn't in the regular link tables, so we need to update manually:
2738                 if ( $title->isTalkPage() ) {
2739                         $other = $title->getSubjectPage();
2740                 } else {
2741                         $other = $title->getTalkPage();
2742                 }
2743                 $other->invalidateCache();
2744                 $other->purgeSquid();
2745
2746                 $title->touchLinks();
2747                 $title->purgeSquid();
2748         }
2749
2750         static function onArticleDelete( $title ) {
2751                 global $wgUseFileCache, $wgMessageCache;
2752
2753                 $title->touchLinks();
2754                 $title->purgeSquid();
2755
2756                 # File cache
2757                 if ( $wgUseFileCache ) {
2758                         $cm = new HTMLFileCache( $title );
2759                         @unlink( $cm->fileCacheName() );
2760                 }
2761
2762                 if( $title->getNamespace() == NS_MEDIAWIKI) {
2763                         $wgMessageCache->replace( $title->getDBkey(), false );
2764                 }
2765         }
2766
2767         /**
2768          * Purge caches on page update etc
2769          */
2770         static function onArticleEdit( $title ) {
2771                 global $wgDeferredUpdateList, $wgUseFileCache;
2772
2773                 // Invalidate caches of articles which include this page
2774                 $update = new HTMLCacheUpdate( $title, 'templatelinks' );
2775                 $wgDeferredUpdateList[] = $update;
2776
2777                 # Purge squid for this page only
2778                 $title->purgeSquid();
2779
2780                 # Clear file cache
2781                 if ( $wgUseFileCache ) {
2782                         $cm = new HTMLFileCache( $title );
2783                         @unlink( $cm->fileCacheName() );
2784                 }
2785         }
2786
2787         /**#@-*/
2788
2789         /**
2790          * Info about this page
2791          * Called for ?action=info when $wgAllowPageInfo is on.
2792          *
2793          * @public
2794          */
2795         function info() {
2796                 global $wgLang, $wgOut, $wgAllowPageInfo, $wgUser;
2797
2798                 if ( !$wgAllowPageInfo ) {
2799                         $wgOut->showErrorPage( 'nosuchaction', 'nosuchactiontext' );
2800                         return;
2801                 }
2802
2803                 $page = $this->mTitle->getSubjectPage();
2804
2805                 $wgOut->setPagetitle( $page->getPrefixedText() );
2806                 $wgOut->setPageTitleActionText( wfMsg( 'info_short' ) );
2807                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
2808
2809                 # first, see if the page exists at all.
2810                 $exists = $page->getArticleId() != 0;
2811                 if( !$exists ) {
2812                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
2813                                 $wgOut->addHTML(wfMsgWeirdKey ( $this->mTitle->getText() ) );
2814                         } else {
2815                                 $wgOut->addHTML(wfMsg( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon' ) );
2816                         }
2817                 } else {
2818                         $dbr = wfGetDB( DB_SLAVE );
2819                         $wl_clause = array(
2820                                 'wl_title'     => $page->getDBkey(),
2821                                 'wl_namespace' => $page->getNamespace() );
2822                         $numwatchers = $dbr->selectField(
2823                                 'watchlist',
2824                                 'COUNT(*)',
2825                                 $wl_clause,
2826                                 __METHOD__,
2827                                 $this->getSelectOptions() );
2828
2829                         $pageInfo = $this->pageCountInfo( $page );
2830                         $talkInfo = $this->pageCountInfo( $page->getTalkPage() );
2831
2832                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $wgLang->formatNum( $numwatchers ) ) . '</li>' );
2833                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $wgLang->formatNum( $pageInfo['edits'] ) ) . '</li>');
2834                         if( $talkInfo ) {
2835                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $wgLang->formatNum( $talkInfo['edits'] ) ) . '</li>');
2836                         }
2837                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $wgLang->formatNum( $pageInfo['authors'] ) ) . '</li>' );
2838                         if( $talkInfo ) {
2839                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $wgLang->formatNum( $talkInfo['authors'] ) ) . '</li>' );
2840                         }
2841                         $wgOut->addHTML( '</ul>' );
2842
2843                 }
2844         }
2845
2846         /**
2847          * Return the total number of edits and number of unique editors
2848          * on a given page. If page does not exist, returns false.
2849          *
2850          * @param Title $title
2851          * @return array
2852          * @private
2853          */
2854         function pageCountInfo( $title ) {
2855                 $id = $title->getArticleId();
2856                 if( $id == 0 ) {
2857                         return false;
2858                 }
2859
2860                 $dbr = wfGetDB( DB_SLAVE );
2861
2862                 $rev_clause = array( 'rev_page' => $id );
2863
2864                 $edits = $dbr->selectField(
2865                         'revision',
2866                         'COUNT(rev_page)',
2867                         $rev_clause,
2868                         __METHOD__,
2869                         $this->getSelectOptions() );
2870
2871                 $authors = $dbr->selectField(
2872                         'revision',
2873                         'COUNT(DISTINCT rev_user_text)',
2874                         $rev_clause,
2875                         __METHOD__,
2876                         $this->getSelectOptions() );
2877
2878                 return array( 'edits' => $edits, 'authors' => $authors );
2879         }
2880
2881         /**
2882          * Return a list of templates used by this article.
2883          * Uses the templatelinks table
2884          *
2885          * @return array Array of Title objects
2886          */
2887         function getUsedTemplates() {
2888                 $result = array();
2889                 $id = $this->mTitle->getArticleID();
2890                 if( $id == 0 ) {
2891                         return array();
2892                 }
2893
2894                 $dbr = wfGetDB( DB_SLAVE );
2895                 $res = $dbr->select( array( 'templatelinks' ),
2896                         array( 'tl_namespace', 'tl_title' ),
2897                         array( 'tl_from' => $id ),
2898                         'Article:getUsedTemplates' );
2899                 if ( false !== $res ) {
2900                         if ( $dbr->numRows( $res ) ) {
2901                                 while ( $row = $dbr->fetchObject( $res ) ) {
2902                                         $result[] = Title::makeTitle( $row->tl_namespace, $row->tl_title );
2903                                 }
2904                         }
2905                 }
2906                 $dbr->freeResult( $res );
2907                 return $result;
2908         }
2909
2910         /**
2911          * Return an auto-generated summary if the text provided is a redirect.
2912          *
2913          * @param  string $text The wikitext to check
2914          * @return string '' or an appropriate summary
2915          */
2916         public static function getRedirectAutosummary( $text ) {
2917                 $rt = Title::newFromRedirect( $text );
2918                 if( is_object( $rt ) )
2919                         return wfMsgForContent( 'autoredircomment', $rt->getFullText() );
2920                 else
2921                         return '';
2922         }
2923
2924         /**
2925          * Return an auto-generated summary if the new text is much shorter than
2926          * the old text.
2927          *
2928          * @param  string $oldtext The previous text of the page
2929          * @param  string $text    The submitted text of the page
2930          * @return string An appropriate autosummary, or an empty string.
2931          */
2932         public static function getBlankingAutosummary( $oldtext, $text ) {
2933                 if ($oldtext!='' && $text=='') {
2934                         return wfMsgForContent('autosumm-blank');
2935                 } elseif (strlen($oldtext) > 10 * strlen($text) && strlen($text) < 500) {
2936                         #Removing more than 90% of the article
2937                         global $wgContLang;
2938                         $truncatedtext = $wgContLang->truncate($text, max(0, 200 - strlen(wfMsgForContent('autosumm-replace'))), '...');
2939                         return wfMsgForContent('autosumm-replace', $truncatedtext);
2940                 } else {
2941                         return '';
2942                 }
2943         }
2944
2945         /**
2946         * Return an applicable autosummary if one exists for the given edit.
2947         * @param string $oldtext The previous text of the page.
2948         * @param string $newtext The submitted text of the page.
2949         * @param bitmask $flags A bitmask of flags submitted for the edit.
2950         * @return string An appropriate autosummary, or an empty string.
2951         */
2952         public static function getAutosummary( $oldtext, $newtext, $flags ) {
2953
2954                 # This code is UGLY UGLY UGLY.
2955                 # Somebody PLEASE come up with a more elegant way to do it.
2956
2957                 #Redirect autosummaries
2958                 $summary = self::getRedirectAutosummary( $newtext );
2959
2960                 if ($summary)
2961                         return $summary;
2962
2963                 #Blanking autosummaries
2964                 if (!($flags & EDIT_NEW))
2965                         $summary = self::getBlankingAutosummary( $oldtext, $newtext );
2966
2967                 if ($summary)
2968                         return $summary;
2969
2970                 #New page autosummaries
2971                 if ($flags & EDIT_NEW && strlen($newtext)) {
2972                         #If they're making a new article, give its text, truncated, in the summary.
2973                         global $wgContLang;
2974                         $truncatedtext = $wgContLang->truncate(
2975                                 str_replace("\n", ' ', $newtext),
2976                                 max( 0, 200 - strlen( wfMsgForContent( 'autosumm-new') ) ),
2977                                 '...' );
2978                         $summary = wfMsgForContent( 'autosumm-new', $truncatedtext );
2979                 }
2980
2981                 if ($summary)
2982                         return $summary;
2983
2984                 return $summary;
2985         }
2986
2987         /**
2988          * Add the primary page-view wikitext to the output buffer
2989          * Saves the text into the parser cache if possible.
2990          * Updates templatelinks if it is out of date.
2991          *
2992          * @param string  $text
2993          * @param bool    $cache
2994          */
2995         public function outputWikiText( $text, $cache = true ) {
2996                 global $wgParser, $wgUser, $wgOut;
2997
2998                 $popts = $wgOut->parserOptions();
2999                 $popts->setTidy(true);
3000                 $parserOutput = $wgParser->parse( $text, $this->mTitle,
3001                         $popts, true, true, $this->getRevIdFetched() );
3002                 $popts->setTidy(false);
3003                 if ( $cache && $this && $parserOutput->getCacheTime() != -1 ) {
3004                         $parserCache =& ParserCache::singleton();
3005                         $parserCache->save( $parserOutput, $this, $wgUser );
3006                 }
3007
3008                 if ( !wfReadOnly() && $this->mTitle->areRestrictionsCascading() ) {
3009                         // templatelinks table may have become out of sync,
3010                         // especially if using variable-based transclusions.
3011                         // For paranoia, check if things have changed and if
3012                         // so apply updates to the database. This will ensure
3013                         // that cascaded protections apply as soon as the changes
3014                         // are visible.
3015
3016                         # Get templates from templatelinks
3017                         $id = $this->mTitle->getArticleID();
3018
3019                         $tlTemplates = array();
3020
3021                         $dbr = wfGetDB( DB_SLAVE );
3022                         $res = $dbr->select( array( 'templatelinks' ),
3023                                 array( 'tl_namespace', 'tl_title' ),
3024                                 array( 'tl_from' => $id ),
3025                                 'Article:getUsedTemplates' );
3026
3027                         global $wgContLang;
3028
3029                         if ( false !== $res ) {
3030                                 if ( $dbr->numRows( $res ) ) {
3031                                         while ( $row = $dbr->fetchObject( $res ) ) {
3032                                                 $tlTemplates[] = $wgContLang->getNsText( $row->tl_namespace ) . ':' . $row->tl_title ;
3033                                         }
3034                                 }
3035                         }
3036
3037                         # Get templates from parser output.
3038                         $poTemplates_allns = $parserOutput->getTemplates();
3039
3040                         $poTemplates = array ();
3041                         foreach ( $poTemplates_allns as $ns_templates ) {
3042                                 $poTemplates = array_merge( $poTemplates, $ns_templates );
3043                         }
3044
3045                         # Get the diff
3046                         $templates_diff = array_diff( $poTemplates, $tlTemplates );
3047
3048                         if ( count( $templates_diff ) > 0 ) {
3049                                 # Whee, link updates time.
3050                                 $u = new LinksUpdate( $this->mTitle, $parserOutput );
3051
3052                                 $dbw = wfGetDb( DB_MASTER );
3053                                 $dbw->begin();
3054
3055                                 $u->doUpdate();
3056
3057                                 $dbw->commit();
3058                         }
3059                 }
3060
3061                 $wgOut->addParserOutput( $parserOutput );
3062         }
3063
3064 }