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                 $fields = array(
 262                                 'page_id',
 263                                 'page_namespace',
 264                                 'page_title',
 265                                 'page_restrictions',
 266                                 'page_counter',
 267                                 'page_is_redirect',
 268                                 'page_is_new',
 269                                 'page_random',
 270                                 'page_touched',
 271                                 'page_latest',
 272                                 'page_len',
 273                 );
 274                 wfRunHooks( 'ArticlePageDataBefore', array( &$this, &$fields ) );
 275                 $row = $dbr->selectRow(
 276                         'page',
 277                         $fields,
 278                         $conditions,
 279                         __METHOD__
 280                 );
 281                 wfRunHooks( 'ArticlePageDataAfter', array( &$this, &$row ) );
 282                 return $row ;
 283         }
 284
 285         /**
 286          * @param Database $dbr
 287          * @param Title $title
 288          */
 289         function pageDataFromTitle( $dbr, $title ) {
 290                 return $this->pageData( $dbr, array(
 291                         'page_namespace' => $title->getNamespace(),
 292                         'page_title'     => $title->getDBkey() ) );
 293         }
 294
 295         /**
 296          * @param Database $dbr
 297          * @param int $id
 298          */
 299         function pageDataFromId( $dbr, $id ) {
 300                 return $this->pageData( $dbr, array( 'page_id' => $id ) );
 301         }
 302
 303         /**
 304          * Set the general counter, title etc data loaded from
 305          * some source.
 306          *
 307          * @param object $data
 308          * @private
 309          */
 310         function loadPageData( $data = 'fromdb' ) {
 311                 if ( $data === 'fromdb' ) {
 312                         $dbr = $this->getDB();
 313                         $data = $this->pageDataFromId( $dbr, $this->getId() );
 314                 }
 315
 316                 $lc =& LinkCache::singleton();
 317                 if ( $data ) {
 318                         $lc->addGoodLinkObj( $data->page_id, $this->mTitle );
 319
 320                         $this->mTitle->mArticleID = $data->page_id;
 321
 322                         # Old-fashioned restrictions.
 323                         $this->mTitle->loadRestrictions( $data->page_restrictions );
 324
 325                         $this->mCounter     = $data->page_counter;
 326                         $this->mTouched     = wfTimestamp( TS_MW, $data->page_touched );
 327                         $this->mIsRedirect  = $data->page_is_redirect;
 328                         $this->mLatest      = $data->page_latest;
 329                 } else {
 330                         if ( is_object( $this->mTitle ) ) {
 331                                 $lc->addBadLinkObj( $this->mTitle );
 332                         }
 333                         $this->mTitle->mArticleID = 0;
 334                 }
 335
 336                 $this->mDataLoaded  = true;
 337         }
 338
 339         /**
 340          * Get text of an article from database
 341          * Does *NOT* follow redirects.
 342          * @param int $oldid 0 for whatever the latest revision is
 343          * @return string
 344          */
 345         function fetchContent( $oldid = 0 ) {
 346                 if ( $this->mContentLoaded ) {
 347                         return $this->mContent;
 348                 }
 349
 350                 $dbr = $this->getDB();
 351
 352                 # Pre-fill content with error message so that if something
 353                 # fails we'll have something telling us what we intended.
 354                 $t = $this->mTitle->getPrefixedText();
 355                 if( $oldid ) {
 356                         $t .= ',oldid='.$oldid;
 357                 }
 358                 $this->mContent = wfMsg( 'missingarticle', $t ) ;
 359
 360                 if( $oldid ) {
 361                         $revision = Revision::newFromId( $oldid );
 362                         if( is_null( $revision ) ) {
 363                                 wfDebug( __METHOD__." failed to retrieve specified revision, id $oldid\n" );
 364                                 return false;
 365                         }
 366                         $data = $this->pageDataFromId( $dbr, $revision->getPage() );
 367                         if( !$data ) {
 368                                 wfDebug( __METHOD__." failed to get page data linked to revision id $oldid\n" );
 369                                 return false;
 370                         }
 371                         $this->mTitle = Title::makeTitle( $data->page_namespace, $data->page_title );
 372                         $this->loadPageData( $data );
 373                 } else {
 374                         if( !$this->mDataLoaded ) {
 375                                 $data = $this->pageDataFromTitle( $dbr, $this->mTitle );
 376                                 if( !$data ) {
 377                                         wfDebug( __METHOD__." failed to find page data for title " . $this->mTitle->getPrefixedText() . "\n" );
 378                                         return false;
 379                                 }
 380                                 $this->loadPageData( $data );
 381                         }
 382                         $revision = Revision::newFromId( $this->mLatest );
 383                         if( is_null( $revision ) ) {
 384                                 wfDebug( __METHOD__." failed to retrieve current page, rev_id {$data->page_latest}\n" );
 385                                 return false;
 386                         }
 387                 }
 388
 389                 // FIXME: Horrible, horrible! This content-loading interface just plain sucks.
 390                 // We should instead work with the Revision object when we need it...
 391                 $this->mContent = $revision->userCan( Revision::DELETED_TEXT ) ? $revision->getRawText() : "";
 392                 //$this->mContent   = $revision->getText();
 393
 394                 $this->mUser      = $revision->getUser();
 395                 $this->mUserText  = $revision->getUserText();
 396                 $this->mComment   = $revision->getComment();
 397                 $this->mTimestamp = wfTimestamp( TS_MW, $revision->getTimestamp() );
 398
 399                 $this->mRevIdFetched = $revision->getID();
 400                 $this->mContentLoaded = true;
 401                 $this->mRevision =& $revision;
 402
 403                 wfRunHooks( 'ArticleAfterFetchContent', array( &$this, &$this->mContent ) ) ;
 404
 405                 return $this->mContent;
 406         }
 407
 408         /**
 409          * Read/write accessor to select FOR UPDATE
 410          *
 411          * @param $x Mixed: FIXME
 412          */
 413         function forUpdate( $x = NULL ) {
 414                 return wfSetVar( $this->mForUpdate, $x );
 415         }
 416
 417         /**
 418          * Get the database which should be used for reads
 419          *
 420          * @return Database
 421          */
 422         function getDB() {
 423                 return wfGetDB( DB_MASTER );
 424         }
 425
 426         /**
 427          * Get options for all SELECT statements
 428          *
 429          * @param $options Array: an optional options array which'll be appended to
 430          *                       the default
 431          * @return Array: options
 432          */
 433         function getSelectOptions( $options = '' ) {
 434                 if ( $this->mForUpdate ) {
 435                         if ( is_array( $options ) ) {
 436                                 $options[] = 'FOR UPDATE';
 437                         } else {
 438                                 $options = 'FOR UPDATE';
 439                         }
 440                 }
 441                 return $options;
 442         }
 443
 444         /**
 445          * @return int Page ID
 446          */
 447         function getID() {
 448                 if( $this->mTitle ) {
 449                         return $this->mTitle->getArticleID();
 450                 } else {
 451                         return 0;
 452                 }
 453         }
 454
 455         /**
 456          * @return bool Whether or not the page exists in the database
 457          */
 458         function exists() {
 459                 return $this->getId() != 0;
 460         }
 461
 462         /**
 463          * @return int The view count for the page
 464          */
 465         function getCount() {
 466                 if ( -1 == $this->mCounter ) {
 467                         $id = $this->getID();
 468                         if ( $id == 0 ) {
 469                                 $this->mCounter = 0;
 470                         } else {
 471                                 $dbr = wfGetDB( DB_SLAVE );
 472                                 $this->mCounter = $dbr->selectField( 'page', 'page_counter', array( 'page_id' => $id ),
 473                                         'Article::getCount', $this->getSelectOptions() );
 474                         }
 475                 }
 476                 return $this->mCounter;
 477         }
 478
 479         /**
 480          * Determine whether a page  would be suitable for being counted as an
 481          * article in the site_stats table based on the title & its content
 482          *
 483          * @param $text String: text to analyze
 484          * @return bool
 485          */
 486         function isCountable( $text ) {
 487                 global $wgUseCommaCount;
 488
 489                 $token = $wgUseCommaCount ? ',' : '[[';
 490                 return
 491                         $this->mTitle->isContentPage()
 492                         && !$this->isRedirect( $text )
 493                         && in_string( $token, $text );
 494         }
 495
 496         /**
 497          * Tests if the article text represents a redirect
 498          *
 499          * @param $text String: FIXME
 500          * @return bool
 501          */
 502         function isRedirect( $text = false ) {
 503                 if ( $text === false ) {
 504                         $this->loadContent();
 505                         $titleObj = Title::newFromRedirect( $this->fetchContent() );
 506                 } else {
 507                         $titleObj = Title::newFromRedirect( $text );
 508                 }
 509                 return $titleObj !== NULL;
 510         }
 511
 512         /**
 513          * Returns true if the currently-referenced revision is the current edit
 514          * to this page (and it exists).
 515          * @return bool
 516          */
 517         function isCurrent() {
 518                 # If no oldid, this is the current version.
 519                 if ($this->getOldID() == 0)
 520                         return true;
 521
 522                 return $this->exists() &&
 523                         isset( $this->mRevision ) &&
 524                         $this->mRevision->isCurrent();
 525         }
 526
 527         /**
 528          * Loads everything except the text
 529          * This isn't necessary for all uses, so it's only done if needed.
 530          * @private
 531          */
 532         function loadLastEdit() {
 533                 if ( -1 != $this->mUser )
 534                         return;
 535
 536                 # New or non-existent articles have no user information
 537                 $id = $this->getID();
 538                 if ( 0 == $id ) return;
 539
 540                 $this->mLastRevision = Revision::loadFromPageId( $this->getDB(), $id );
 541                 if( !is_null( $this->mLastRevision ) ) {
 542                         $this->mUser      = $this->mLastRevision->getUser();
 543                         $this->mUserText  = $this->mLastRevision->getUserText();
 544                         $this->mTimestamp = $this->mLastRevision->getTimestamp();
 545                         $this->mComment   = $this->mLastRevision->getComment();
 546                         $this->mMinorEdit = $this->mLastRevision->isMinor();
 547                         $this->mRevIdFetched = $this->mLastRevision->getID();
 548                 }
 549         }
 550
 551         function getTimestamp() {
 552                 // Check if the field has been filled by ParserCache::get()
 553                 if ( !$this->mTimestamp ) {
 554                         $this->loadLastEdit();
 555                 }
 556                 return wfTimestamp(TS_MW, $this->mTimestamp);
 557         }
 558
 559         function getUser() {
 560                 $this->loadLastEdit();
 561                 return $this->mUser;
 562         }
 563
 564         function getUserText() {
 565                 $this->loadLastEdit();
 566                 return $this->mUserText;
 567         }
 568
 569         function getComment() {
 570                 $this->loadLastEdit();
 571                 return $this->mComment;
 572         }
 573
 574         function getMinorEdit() {
 575                 $this->loadLastEdit();
 576                 return $this->mMinorEdit;
 577         }
 578
 579         function getRevIdFetched() {
 580                 $this->loadLastEdit();
 581                 return $this->mRevIdFetched;
 582         }
 583
 584         /**
 585          * @todo Document, fixme $offset never used.
 586          * @param $limit Integer: default 0.
 587          * @param $offset Integer: default 0.
 588          */
 589         function getContributors($limit = 0, $offset = 0) {
 590                 # XXX: this is expensive; cache this info somewhere.
 591
 592                 $contribs = array();
 593                 $dbr = wfGetDB( DB_SLAVE );
 594                 $revTable = $dbr->tableName( 'revision' );
 595                 $userTable = $dbr->tableName( 'user' );
 596                 $user = $this->getUser();
 597                 $pageId = $this->getId();
 598
 599                 $sql = "SELECT rev_user, rev_user_text, user_real_name, MAX(rev_timestamp) as timestamp
 600                         FROM $revTable LEFT JOIN $userTable ON rev_user = user_id
 601                         WHERE rev_page = $pageId
 602                         AND rev_user != $user
 603                         GROUP BY rev_user, rev_user_text, user_real_name
 604                         ORDER BY timestamp DESC";
 605
 606                 if ($limit > 0) { $sql .= ' LIMIT '.$limit; }
 607                 $sql .= ' '. $this->getSelectOptions();
 608
 609                 $res = $dbr->query($sql, __METHOD__);
 610
 611                 while ( $line = $dbr->fetchObject( $res ) ) {
 612                         $contribs[] = array($line->rev_user, $line->rev_user_text, $line->user_real_name);
 613                 }
 614
 615                 $dbr->freeResult($res);
 616                 return $contribs;
 617         }
 618
 619         /**
 620          * This is the default action of the script: just view the page of
 621          * the given title.
 622         */
 623         function view() {
 624                 global $wgUser, $wgOut, $wgRequest, $wgContLang;
 625                 global $wgEnableParserCache, $wgStylePath, $wgUseRCPatrol, $wgParser;
 626                 global $wgUseTrackbacks, $wgNamespaceRobotPolicies, $wgArticleRobotPolicies;
 627                 $sk = $wgUser->getSkin();
 628
 629                 wfProfileIn( __METHOD__ );
 630
 631                 $parserCache =& ParserCache::singleton();
 632                 $ns = $this->mTitle->getNamespace(); # shortcut
 633
 634                 # Get variables from query string
 635                 $oldid = $this->getOldID();
 636
 637                 # getOldID may want us to redirect somewhere else
 638                 if ( $this->mRedirectUrl ) {
 639                         $wgOut->redirect( $this->mRedirectUrl );
 640                         wfProfileOut( __METHOD__ );
 641                         return;
 642                 }
 643
 644                 $diff = $wgRequest->getVal( 'diff' );
 645                 $rcid = $wgRequest->getVal( 'rcid' );
 646                 $rdfrom = $wgRequest->getVal( 'rdfrom' );
 647                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
 648
 649                 $wgOut->setArticleFlag( true );
 650
 651                 # Discourage indexing of printable versions, but encourage following
 652                 if( $wgOut->isPrintable() ) {
 653                         $policy = 'noindex,follow';
 654                 } elseif ( isset( $wgArticleRobotPolicies[$this->mTitle->getPrefixedText()] ) ) {
 655                         $policy = $wgArticleRobotPolicies[$this->mTitle->getPrefixedText()];
 656                 } elseif( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 657                         # Honour customised robot policies for this namespace
 658                         $policy = $wgNamespaceRobotPolicies[$ns];
 659                 } else {
 660                         # Default to encourage indexing and following links
 661                         $policy = 'index,follow';
 662                 }
 663                 $wgOut->setRobotPolicy( $policy );
 664
 665                 # If we got diff and oldid in the query, we want to see a
 666                 # diff page instead of the article.
 667
 668                 if ( !is_null( $diff ) ) {
 669                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 670
 671                         $de = new DifferenceEngine( $this->mTitle, $oldid, $diff, $rcid );
 672                         // DifferenceEngine directly fetched the revision:
 673                         $this->mRevIdFetched = $de->mNewid;
 674                         $de->showDiffPage( $diffOnly );
 675
 676                         // Needed to get the page's current revision
 677                         $this->loadPageData();
 678                         if( $diff == 0 || $diff == $this->mLatest ) {
 679                                 # Run view updates for current revision only
 680                                 $this->viewUpdates();
 681                         }
 682                         wfProfileOut( __METHOD__ );
 683                         return;
 684                 }
 685
 686                 if ( empty( $oldid ) && $this->checkTouched() ) {
 687                         $wgOut->setETag($parserCache->getETag($this, $wgUser));
 688
 689                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 690                                 wfProfileOut( __METHOD__ );
 691                                 return;
 692                         } else if ( $this->tryFileCache() ) {
 693                                 # tell wgOut that output is taken care of
 694                                 $wgOut->disable();
 695                                 $this->viewUpdates();
 696                                 wfProfileOut( __METHOD__ );
 697                                 return;
 698                         }
 699                 }
 700
 701                 # Should the parser cache be used?
 702                 $pcache = $wgEnableParserCache
 703                         && intval( $wgUser->getOption( 'stubthreshold' ) ) == 0
 704                         && $this->exists()
 705                         && empty( $oldid )
 706                         && !$this->mTitle->isCssOrJsPage()
 707                         && !$this->mTitle->isCssJsSubpage();
 708                 wfDebug( 'Article::view using parser cache: ' . ($pcache ? 'yes' : 'no' ) . "\n" );
 709                 if ( $wgUser->getOption( 'stubthreshold' ) ) {
 710                         wfIncrStats( 'pcache_miss_stub' );
 711                 }
 712
 713                 $wasRedirected = false;
 714                 if ( isset( $this->mRedirectedFrom ) ) {
 715                         // This is an internally redirected page view.
 716                         // We'll need a backlink to the source page for navigation.
 717                         if ( wfRunHooks( 'ArticleViewRedirect', array( &$this ) ) ) {
 718                                 $sk = $wgUser->getSkin();
 719                                 $redir = $sk->makeKnownLinkObj( $this->mRedirectedFrom, '', 'redirect=no' );
 720                                 $s = wfMsg( 'redirectedfrom', $redir );
 721                                 $wgOut->setSubtitle( $s );
 722
 723                                 // Set the fragment if one was specified in the redirect
 724                                 if ( strval( $this->mTitle->getFragment() ) != '' ) {
 725                                         $fragment = Xml::escapeJsString( $this->mTitle->getFragmentForURL() );
 726                                         $wgOut->addInlineScript( "redirectToFragment(\"$fragment\");" );
 727                                 }
 728                                 $wasRedirected = true;
 729                         }
 730                 } elseif ( !empty( $rdfrom ) ) {
 731                         // This is an externally redirected view, from some other wiki.
 732                         // If it was reported from a trusted site, supply a backlink.
 733                         global $wgRedirectSources;
 734                         if( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 735                                 $sk = $wgUser->getSkin();
 736                                 $redir = $sk->makeExternalLink( $rdfrom, $rdfrom );
 737                                 $s = wfMsg( 'redirectedfrom', $redir );
 738                                 $wgOut->setSubtitle( $s );
 739                                 $wasRedirected = true;
 740                         }
 741                 }
 742
 743                 if ( $this->mTitle->isProtected() ) {
 744                         $editrestr = $this->mTitle->getRestrictions('edit');
 745                         $moverestr = $this->mTitle->getRestrictions('move');
 746                         $wgOut->setSubtitle($wgOut->getSubtitle() .
 747                                 wfMsg( 'protected-subtitle',
 748                                         $editrestr[0], $moverestr[0] ) );
 749                 }
 750
 751                 $outputDone = false;
 752                 wfRunHooks( 'ArticleViewHeader', array( &$this, &$outputDone, &$pcache ) );
 753                 if ( $pcache ) {
 754                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 755                                 // Ensure that UI elements requiring revision ID have
 756                                 // the correct version information.
 757                                 $wgOut->setRevisionId( $this->mLatest );
 758                                 $outputDone = true;
 759                         }
 760                 }
 761                 if ( !$outputDone ) {
 762                         $text = $this->getContent();
 763                         if ( $text === false ) {
 764                                 # Failed to load, replace text with error message
 765                                 $t = $this->mTitle->getPrefixedText();
 766                                 if( $oldid ) {
 767                                         $t .= ',oldid='.$oldid;
 768                                         $text = wfMsg( 'missingarticle', $t );
 769                                 } else {
 770                                         $text = wfMsg( 'noarticletext', $t );
 771                                 }
 772                         }
 773
 774                         # Another whitelist check in case oldid is altering the title
 775                         if ( !$this->mTitle->userCanRead() ) {
 776                                 $wgOut->loginToUse();
 777                                 $wgOut->output();
 778                                 exit;
 779                         }
 780
 781                         # We're looking at an old revision
 782
 783                         if ( !empty( $oldid ) ) {
 784                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 785                                 if( is_null( $this->mRevision ) ) {
 786                                         // FIXME: This would be a nice place to load the 'no such page' text.
 787                                 } else {
 788                                         $this->setOldSubtitle( isset($this->mOldId) ? $this->mOldId : $oldid );
 789                                         if( $this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
 790                                                 if( !$this->mRevision->userCan( Revision::DELETED_TEXT ) ) {
 791                                                         $wgOut->addWikiText( wfMsg( 'rev-deleted-text-permission' ) );
 792                                                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 793                                                         return;
 794                                                 } else {
 795                                                         $wgOut->addWikiText( wfMsg( 'rev-deleted-text-view' ) );
 796                                                         // and we are allowed to see...
 797                                                 }
 798                                         }
 799                                 }
 800
 801                         }
 802                 }
 803                 if( !$outputDone ) {
 804                         $wgOut->setRevisionId( $this->getRevIdFetched() );
 805
 806                          // Pages containing custom CSS or JavaScript get special treatment
 807                         if( $this->mTitle->isCssOrJsPage() || $this->mTitle->isCssJsSubpage() ) {
 808                                 $wgOut->addHtml( wfMsgExt( 'clearyourcache', 'parse' ) );
 809
 810                                 // Give hooks a chance to customise the output
 811                                 if( wfRunHooks( 'ShowRawCssJs', array( $this->mContent, $this->mTitle, $wgOut ) ) ) {
 812                                         // Wrap the whole lot in a <pre> and don't parse
 813                                         $m = array();
 814                                         preg_match( '!\.(css|js)$!u', $this->mTitle->getText(), $m );
 815                                         $wgOut->addHtml( "<pre class=\"mw-code mw-{$m[1]}\" dir=\"ltr\">\n" );
 816                                         $wgOut->addHtml( htmlspecialchars( $this->mContent ) );
 817                                         $wgOut->addHtml( "\n</pre>\n" );
 818                                 }
 819
 820                         }
 821
 822                         elseif ( $rt = Title::newFromRedirect( $text ) ) {
 823                                 # Display redirect
 824                                 $imageDir = $wgContLang->isRTL() ? 'rtl' : 'ltr';
 825                                 $imageUrl = $wgStylePath.'/common/images/redirect' . $imageDir . '.png';
 826                                 # Don't overwrite the subtitle if this was an old revision
 827                                 if( !$wasRedirected && $this->isCurrent() ) {
 828                                         $wgOut->setSubtitle( wfMsgHtml( 'redirectpagesub' ) );
 829                                 }
 830                                 $link = $sk->makeLinkObj( $rt, $rt->getFullText() );
 831
 832                                 $wgOut->addHTML( '<img src="'.$imageUrl.'" alt="#REDIRECT " />' .
 833                                   '<span class="redirectText">'.$link.'</span>' );
 834
 835                                 $parseout = $wgParser->parse($text, $this->mTitle, ParserOptions::newFromUser($wgUser));
 836                                 $wgOut->addParserOutputNoText( $parseout );
 837                         } else if ( $pcache ) {
 838                                 # Display content and save to parser cache
 839                                 $this->outputWikiText( $text );
 840                         } else {
 841                                 # Display content, don't attempt to save to parser cache
 842                                 # Don't show section-edit links on old revisions... this way lies madness.
 843                                 if( !$this->isCurrent() ) {
 844                                         $oldEditSectionSetting = $wgOut->parserOptions()->setEditSection( false );
 845                                 }
 846                                 # Display content and don't save to parser cache
 847                                 # With timing hack -- TS 2006-07-26
 848                                 $time = -wfTime();
 849                                 $this->outputWikiText( $text, false );
 850                                 $time += wfTime();
 851
 852                                 # Timing hack
 853                                 if ( $time > 3 ) {
 854                                         wfDebugLog( 'slow-parse', sprintf( "%-5.2f %s", $time,
 855                                                 $this->mTitle->getPrefixedDBkey()));
 856                                 }
 857
 858                                 if( !$this->isCurrent() ) {
 859                                         $wgOut->parserOptions()->setEditSection( $oldEditSectionSetting );
 860                                 }
 861
 862                         }
 863                 }
 864                 /* title may have been set from the cache */
 865                 $t = $wgOut->getPageTitle();
 866                 if( empty( $t ) ) {
 867                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 868                 }
 869
 870                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 871                 if( $ns == NS_USER_TALK &&
 872                         User::isIP( $this->mTitle->getText() ) ) {
 873                         $wgOut->addWikiText( wfMsg('anontalkpagetext') );
 874                 }
 875
 876                 # If we have been passed an &rcid= parameter, we want to give the user a
 877                 # chance to mark this new article as patrolled.
 878                 if ( $wgUseRCPatrol && !is_null( $rcid ) && $rcid != 0 && $wgUser->isAllowed( 'patrol' ) ) {
 879                         $wgOut->addHTML(
 880                                 "<div class='patrollink'>" .
 881                                         wfMsgHtml( 'markaspatrolledlink',
 882                                         $sk->makeKnownLinkObj( $this->mTitle, wfMsgHtml('markaspatrolledtext'),
 883                                                 "action=markpatrolled&rcid=$rcid" )
 884                                         ) .
 885                                 '</div>'
 886                          );
 887                 }
 888
 889                 # Trackbacks
 890                 if ($wgUseTrackbacks)
 891                         $this->addTrackbacks();
 892
 893                 $this->viewUpdates();
 894                 wfProfileOut( __METHOD__ );
 895         }
 896
 897         function addTrackbacks() {
 898                 global $wgOut, $wgUser;
 899
 900                 $dbr = wfGetDB(DB_SLAVE);
 901                 $tbs = $dbr->select(
 902                                 /* FROM   */ 'trackbacks',
 903                                 /* SELECT */ array('tb_id', 'tb_title', 'tb_url', 'tb_ex', 'tb_name'),
 904                                 /* WHERE  */ array('tb_page' => $this->getID())
 905                 );
 906
 907                 if (!$dbr->numrows($tbs))
 908                         return;
 909
 910                 $tbtext = "";
 911                 while ($o = $dbr->fetchObject($tbs)) {
 912                         $rmvtxt = "";
 913                         if ($wgUser->isAllowed( 'trackback' )) {
 914                                 $delurl = $this->mTitle->getFullURL("action=deletetrackback&tbid="
 915                                                 . $o->tb_id . "&token=" . urlencode( $wgUser->editToken() ) );
 916                                 $rmvtxt = wfMsg( 'trackbackremove', htmlspecialchars( $delurl ) );
 917                         }
 918                         $tbtext .= wfMsg(strlen($o->tb_ex) ? 'trackbackexcerpt' : 'trackback',
 919                                         $o->tb_title,
 920                                         $o->tb_url,
 921                                         $o->tb_ex,
 922                                         $o->tb_name,
 923                                         $rmvtxt);
 924                 }
 925                 $wgOut->addWikitext(wfMsg('trackbackbox', $tbtext));
 926         }
 927
 928         function deletetrackback() {
 929                 global $wgUser, $wgRequest, $wgOut, $wgTitle;
 930
 931                 if (!$wgUser->matchEditToken($wgRequest->getVal('token'))) {
 932                         $wgOut->addWikitext(wfMsg('sessionfailure'));
 933                         return;
 934                 }
 935
 936                 if ((!$wgUser->isAllowed('delete'))) {
 937                         $wgOut->permissionRequired( 'delete' );
 938                         return;
 939                 }
 940
 941                 if (wfReadOnly()) {
 942                         $wgOut->readOnlyPage();
 943                         return;
 944                 }
 945
 946                 $db = wfGetDB(DB_MASTER);
 947                 $db->delete('trackbacks', array('tb_id' => $wgRequest->getInt('tbid')));
 948                 $wgTitle->invalidateCache();
 949                 $wgOut->addWikiText(wfMsg('trackbackdeleteok'));
 950         }
 951
 952         function render() {
 953                 global $wgOut;
 954
 955                 $wgOut->setArticleBodyOnly(true);
 956                 $this->view();
 957         }
 958
 959         /**
 960          * Handle action=purge
 961          */
 962         function purge() {
 963                 global $wgUser, $wgRequest, $wgOut;
 964
 965                 if ( $wgUser->isAllowed( 'purge' ) || $wgRequest->wasPosted() ) {
 966                         if( wfRunHooks( 'ArticlePurge', array( &$this ) ) ) {
 967                                 $this->doPurge();
 968                         }
 969                 } else {
 970                         $msg = $wgOut->parse( wfMsg( 'confirm_purge' ) );
 971                         $action = $this->mTitle->escapeLocalURL( 'action=purge' );
 972                         $button = htmlspecialchars( wfMsg( 'confirm_purge_button' ) );
 973                         $msg = str_replace( '$1',
 974                                 "<form method=\"post\" action=\"$action\">\n" .
 975                                 "<input type=\"submit\" name=\"submit\" value=\"$button\" />\n" .
 976                                 "</form>\n", $msg );
 977
 978                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 979                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
 980                         $wgOut->addHTML( $msg );
 981                 }
 982         }
 983
 984         /**
 985          * Perform the actions of a page purging
 986          */
 987         function doPurge() {
 988                 global $wgUseSquid;
 989                 // Invalidate the cache
 990                 $this->mTitle->invalidateCache();
 991
 992                 if ( $wgUseSquid ) {
 993                         // Commit the transaction before the purge is sent
 994                         $dbw = wfGetDB( DB_MASTER );
 995                         $dbw->immediateCommit();
 996
 997                         // Send purge
 998                         $update = SquidUpdate::newSimplePurge( $this->mTitle );
 999                         $update->doUpdate();
1000                 }
1001                 $this->view();
1002         }
1003
1004         /**
1005          * Insert a new empty page record for this article.
1006          * This *must* be followed up by creating a revision
1007          * and running $this->updateToLatest( $rev_id );
1008          * or else the record will be left in a funky state.
1009          * Best if all done inside a transaction.
1010          *
1011          * @param Database $dbw
1012          * @return int     The newly created page_id key
1013          * @private
1014          */
1015         function insertOn( $dbw ) {
1016                 wfProfileIn( __METHOD__ );
1017
1018                 $page_id = $dbw->nextSequenceValue( 'page_page_id_seq' );
1019                 $dbw->insert( 'page', array(
1020                         'page_id'           => $page_id,
1021                         'page_namespace'    => $this->mTitle->getNamespace(),
1022                         'page_title'        => $this->mTitle->getDBkey(),
1023                         'page_counter'      => 0,
1024                         'page_restrictions' => '',
1025                         'page_is_redirect'  => 0, # Will set this shortly...
1026                         'page_is_new'       => 1,
1027                         'page_random'       => wfRandom(),
1028                         'page_touched'      => $dbw->timestamp(),
1029                         'page_latest'       => 0, # Fill this in shortly...
1030                         'page_len'          => 0, # Fill this in shortly...
1031                 ), __METHOD__ );
1032                 $newid = $dbw->insertId();
1033
1034                 $this->mTitle->resetArticleId( $newid );
1035
1036                 wfProfileOut( __METHOD__ );
1037                 return $newid;
1038         }
1039
1040         /**
1041          * Update the page record to point to a newly saved revision.
1042          *
1043          * @param Database $dbw
1044          * @param Revision $revision For ID number, and text used to set
1045                                      length and redirect status fields
1046          * @param int $lastRevision If given, will not overwrite the page field
1047          *                          when different from the currently set value.
1048          *                          Giving 0 indicates the new page flag should
1049          *                          be set on.
1050          * @param bool $lastRevIsRedirect If given, will optimize adding and
1051          *                                                      removing rows in redirect table.
1052          * @return bool true on success, false on failure
1053          * @private
1054          */
1055         function updateRevisionOn( &$dbw, $revision, $lastRevision = null, $lastRevIsRedirect = null ) {
1056                 wfProfileIn( __METHOD__ );
1057
1058                 $text = $revision->getText();
1059                 $rt = Title::newFromRedirect( $text );
1060
1061                 $conditions = array( 'page_id' => $this->getId() );
1062                 if( !is_null( $lastRevision ) ) {
1063                         # An extra check against threads stepping on each other
1064                         $conditions['page_latest'] = $lastRevision;
1065                 }
1066
1067                 $dbw->update( 'page',
1068                         array( /* SET */
1069                                 'page_latest'      => $revision->getId(),
1070                                 'page_touched'     => $dbw->timestamp(),
1071                                 'page_is_new'      => ($lastRevision === 0) ? 1 : 0,
1072                                 'page_is_redirect' => $rt !== NULL ? 1 : 0,
1073                                 'page_len'         => strlen( $text ),
1074                         ),
1075                         $conditions,
1076                         __METHOD__ );
1077
1078                 $result = $dbw->affectedRows() != 0;
1079
1080                 if ($result) {
1081                         // FIXME: Should the result from updateRedirectOn() be returned instead?
1082                         $this->updateRedirectOn( $dbw, $rt, $lastRevIsRedirect );
1083                 }
1084
1085                 wfProfileOut( __METHOD__ );
1086                 return $result;
1087         }
1088
1089         /**
1090          * Add row to the redirect table if this is a redirect, remove otherwise.
1091          *
1092          * @param Database $dbw
1093          * @param $redirectTitle a title object pointing to the redirect target,
1094          *                                                      or NULL if this is not a redirect
1095          * @param bool $lastRevIsRedirect If given, will optimize adding and
1096          *                                                      removing rows in redirect table.
1097          * @return bool true on success, false on failure
1098          * @private
1099          */
1100         function updateRedirectOn( &$dbw, $redirectTitle, $lastRevIsRedirect = null ) {
1101
1102                 // Always update redirects (target link might have changed)
1103                 // Update/Insert if we don't know if the last revision was a redirect or not
1104                 // Delete if changing from redirect to non-redirect
1105                 $isRedirect = !is_null($redirectTitle);
1106                 if ($isRedirect || is_null($lastRevIsRedirect) || $lastRevIsRedirect !== $isRedirect) {
1107
1108                         wfProfileIn( __METHOD__ );
1109
1110                         if ($isRedirect) {
1111
1112                                 // This title is a redirect, Add/Update row in the redirect table
1113                                 $set = array( /* SET */
1114                                         'rd_namespace' => $redirectTitle->getNamespace(),
1115                                         'rd_title'     => $redirectTitle->getDBkey(),
1116                                         'rd_from'      => $this->getId(),
1117                                 );
1118
1119                                 $dbw->replace( 'redirect', array( 'rd_from' ), $set, __METHOD__ );
1120                         } else {
1121                                 // This is not a redirect, remove row from redirect table
1122                                 $where = array( 'rd_from' => $this->getId() );
1123                                 $dbw->delete( 'redirect', $where, __METHOD__);
1124                         }
1125
1126                         wfProfileOut( __METHOD__ );
1127                         return ( $dbw->affectedRows() != 0 );
1128                 }
1129
1130                 return true;
1131         }
1132
1133         /**
1134          * If the given revision is newer than the currently set page_latest,
1135          * update the page record. Otherwise, do nothing.
1136          *
1137          * @param Database $dbw
1138          * @param Revision $revision
1139          */
1140         function updateIfNewerOn( &$dbw, $revision ) {
1141                 wfProfileIn( __METHOD__ );
1142
1143                 $row = $dbw->selectRow(
1144                         array( 'revision', 'page' ),
1145                         array( 'rev_id', 'rev_timestamp', 'page_is_redirect' ),
1146                         array(
1147                                 'page_id' => $this->getId(),
1148                                 'page_latest=rev_id' ),
1149                         __METHOD__ );
1150                 if( $row ) {
1151                         if( wfTimestamp(TS_MW, $row->rev_timestamp) >= $revision->getTimestamp() ) {
1152                                 wfProfileOut( __METHOD__ );
1153                                 return false;
1154                         }
1155                         $prev = $row->rev_id;
1156                         $lastRevIsRedirect = (bool)$row->page_is_redirect;
1157                 } else {
1158                         # No or missing previous revision; mark the page as new
1159                         $prev = 0;
1160                         $lastRevIsRedirect = null;
1161                 }
1162
1163                 $ret = $this->updateRevisionOn( $dbw, $revision, $prev, $lastRevIsRedirect );
1164                 wfProfileOut( __METHOD__ );
1165                 return $ret;
1166         }
1167
1168         /**
1169          * @return string Complete article text, or null if error
1170          */
1171         function replaceSection($section, $text, $summary = '', $edittime = NULL) {
1172                 wfProfileIn( __METHOD__ );
1173
1174                 if( $section == '' ) {
1175                         // Whole-page edit; let the text through unmolested.
1176                 } else {
1177                         if( is_null( $edittime ) ) {
1178                                 $rev = Revision::newFromTitle( $this->mTitle );
1179                         } else {
1180                                 $dbw = wfGetDB( DB_MASTER );
1181                                 $rev = Revision::loadFromTimestamp( $dbw, $this->mTitle, $edittime );
1182                         }
1183                         if( is_null( $rev ) ) {
1184                                 wfDebug( "Article::replaceSection asked for bogus section (page: " .
1185                                         $this->getId() . "; section: $section; edittime: $edittime)\n" );
1186                                 return null;
1187                         }
1188                         $oldtext = $rev->getText();
1189
1190                         if( $section == 'new' ) {
1191                                 # Inserting a new section
1192                                 $subject = $summary ? "== {$summary} ==\n\n" : '';
1193                                 $text = strlen( trim( $oldtext ) ) > 0
1194                                                 ? "{$oldtext}\n\n{$subject}{$text}"
1195                                                 : "{$subject}{$text}";
1196                         } else {
1197                                 # Replacing an existing section; roll out the big guns
1198                                 global $wgParser;
1199                                 $text = $wgParser->replaceSection( $oldtext, $section, $text );
1200                         }
1201
1202                 }
1203
1204                 wfProfileOut( __METHOD__ );
1205                 return $text;
1206         }
1207
1208         /**
1209          * @deprecated use Article::doEdit()
1210          */
1211         function insertNewArticle( $text, $summary, $isminor, $watchthis, $suppressRC=false, $comment=false ) {
1212                 $flags = EDIT_NEW | EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1213                         ( $isminor ? EDIT_MINOR : 0 ) |
1214                         ( $suppressRC ? EDIT_SUPPRESS_RC : 0 );
1215
1216                 # If this is a comment, add the summary as headline
1217                 if ( $comment && $summary != "" ) {
1218                         $text = "== {$summary} ==\n\n".$text;
1219                 }
1220
1221                 $this->doEdit( $text, $summary, $flags );
1222
1223                 $dbw = wfGetDB( DB_MASTER );
1224                 if ($watchthis) {
1225                         if (!$this->mTitle->userIsWatching()) {
1226                                 $dbw->begin();
1227                                 $this->doWatch();
1228                                 $dbw->commit();
1229                         }
1230                 } else {
1231                         if ( $this->mTitle->userIsWatching() ) {
1232                                 $dbw->begin();
1233                                 $this->doUnwatch();
1234                                 $dbw->commit();
1235                         }
1236                 }
1237                 $this->doRedirect( $this->isRedirect( $text ) );
1238         }
1239
1240         /**
1241          * @deprecated use Article::doEdit()
1242          */
1243         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
1244                 $flags = EDIT_UPDATE | EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1245                         ( $minor ? EDIT_MINOR : 0 ) |
1246                         ( $forceBot ? EDIT_FORCE_BOT : 0 );
1247
1248                 $good = $this->doEdit( $text, $summary, $flags );
1249                 if ( $good ) {
1250                         $dbw = wfGetDB( DB_MASTER );
1251                         if ($watchthis) {
1252                                 if (!$this->mTitle->userIsWatching()) {
1253                                         $dbw->begin();
1254                                         $this->doWatch();
1255                                         $dbw->commit();
1256                                 }
1257                         } else {
1258                                 if ( $this->mTitle->userIsWatching() ) {
1259                                         $dbw->begin();
1260                                         $this->doUnwatch();
1261                                         $dbw->commit();
1262                                 }
1263                         }
1264
1265                         $extraq = ''; // Give extensions a chance to modify URL query on update
1266                         wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this, &$sectionanchor, &$extraq ) );
1267
1268                         $this->doRedirect( $this->isRedirect( $text ), $sectionanchor, $extraq );
1269                 }
1270                 return $good;
1271         }
1272
1273         /**
1274          * Article::doEdit()
1275          *
1276          * Change an existing article or create a new article. Updates RC and all necessary caches,
1277          * optionally via the deferred update array.
1278          *
1279          * $wgUser must be set before calling this function.
1280          *
1281          * @param string $text New text
1282          * @param string $summary Edit summary
1283          * @param integer $flags bitfield:
1284          *      EDIT_NEW
1285          *          Article is known or assumed to be non-existent, create a new one
1286          *      EDIT_UPDATE
1287          *          Article is known or assumed to be pre-existing, update it
1288          *      EDIT_MINOR
1289          *          Mark this edit minor, if the user is allowed to do so
1290          *      EDIT_SUPPRESS_RC
1291          *          Do not log the change in recentchanges
1292          *      EDIT_FORCE_BOT
1293          *          Mark the edit a "bot" edit regardless of user rights
1294          *      EDIT_DEFER_UPDATES
1295          *          Defer some of the updates until the end of index.php
1296          *      EDIT_AUTOSUMMARY
1297          *          Fill in blank summaries with generated text where possible
1298          *
1299          * If neither EDIT_NEW nor EDIT_UPDATE is specified, the status of the article will be detected.
1300          * If EDIT_UPDATE is specified and the article doesn't exist, the function will return false. If
1301          * EDIT_NEW is specified and the article does exist, a duplicate key error will cause an exception
1302          * to be thrown from the Database. These two conditions are also possible with auto-detection due
1303          * to MediaWiki's performance-optimised locking strategy.
1304          *
1305          * @return bool success
1306          */
1307         function doEdit( $text, $summary, $flags = 0 ) {
1308                 global $wgUser, $wgDBtransactions;
1309
1310                 wfProfileIn( __METHOD__ );
1311                 $good = true;
1312
1313                 if ( !($flags & EDIT_NEW) && !($flags & EDIT_UPDATE) ) {
1314                         $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
1315                         if ( $aid ) {
1316                                 $flags |= EDIT_UPDATE;
1317                         } else {
1318                                 $flags |= EDIT_NEW;
1319                         }
1320                 }
1321
1322                 if( !wfRunHooks( 'ArticleSave', array( &$this, &$wgUser, &$text,
1323                         &$summary, $flags & EDIT_MINOR,
1324                         null, null, &$flags ) ) )
1325                 {
1326                         wfDebug( __METHOD__ . ": ArticleSave hook aborted save!\n" );
1327                         wfProfileOut( __METHOD__ );
1328                         return false;
1329                 }
1330
1331                 # Silently ignore EDIT_MINOR if not allowed
1332                 $isminor = ( $flags & EDIT_MINOR ) && $wgUser->isAllowed('minoredit');
1333                 $bot = $wgUser->isAllowed( 'bot' ) || ( $flags & EDIT_FORCE_BOT );
1334
1335                 $oldtext = $this->getContent();
1336                 $oldsize = strlen( $oldtext );
1337
1338                 # Provide autosummaries if one is not provided.
1339                 if ($flags & EDIT_AUTOSUMMARY && $summary == '')
1340                         $summary = $this->getAutosummary( $oldtext, $text, $flags );
1341
1342                 $text = $this->preSaveTransform( $text );
1343                 $newsize = strlen( $text );
1344
1345                 $dbw = wfGetDB( DB_MASTER );
1346                 $now = wfTimestampNow();
1347
1348                 if ( $flags & EDIT_UPDATE ) {
1349                         # Update article, but only if changed.
1350
1351                         # Make sure the revision is either completely inserted or not inserted at all
1352                         if( !$wgDBtransactions ) {
1353                                 $userAbort = ignore_user_abort( true );
1354                         }
1355
1356                         $lastRevision = 0;
1357                         $revisionId = 0;
1358
1359                         if ( 0 != strcmp( $text, $oldtext ) ) {
1360                                 $this->mGoodAdjustment = (int)$this->isCountable( $text )
1361                                   - (int)$this->isCountable( $oldtext );
1362                                 $this->mTotalAdjustment = 0;
1363
1364                                 $lastRevision = $dbw->selectField(
1365                                         'page', 'page_latest', array( 'page_id' => $this->getId() ) );
1366
1367                                 if ( !$lastRevision ) {
1368                                         # Article gone missing
1369                                         wfDebug( __METHOD__.": EDIT_UPDATE specified but article doesn't exist\n" );
1370                                         wfProfileOut( __METHOD__ );
1371                                         return false;
1372                                 }
1373
1374                                 $revision = new Revision( array(
1375                                         'page'       => $this->getId(),
1376                                         'comment'    => $summary,
1377                                         'minor_edit' => $isminor,
1378                                         'text'       => $text
1379                                         ) );
1380
1381                                 $dbw->begin();
1382                                 $revisionId = $revision->insertOn( $dbw );
1383
1384                                 # Update page
1385                                 $ok = $this->updateRevisionOn( $dbw, $revision, $lastRevision );
1386
1387                                 if( !$ok ) {
1388                                         /* Belated edit conflict! Run away!! */
1389                                         $good = false;
1390                                         $dbw->rollback();
1391                                 } else {
1392                                         # Update recentchanges
1393                                         if( !( $flags & EDIT_SUPPRESS_RC ) ) {
1394                                                 $rcid = RecentChange::notifyEdit( $now, $this->mTitle, $isminor, $wgUser, $summary,
1395                                                         $lastRevision, $this->getTimestamp(), $bot, '', $oldsize, $newsize,
1396                                                         $revisionId );
1397
1398                                                 # Mark as patrolled if the user can do so
1399                                                 if( $GLOBALS['wgUseRCPatrol'] && $wgUser->isAllowed( 'autopatrol' ) ) {
1400                                                         RecentChange::markPatrolled( $rcid );
1401                                                         PatrolLog::record( $rcid, true );
1402                                                 }
1403                                         }
1404                                         $wgUser->incEditCount();
1405                                         $dbw->commit();
1406                                 }
1407                         } else {
1408                                 $revision = null;
1409                                 // Keep the same revision ID, but do some updates on it
1410                                 $revisionId = $this->getRevIdFetched();
1411                                 // Update page_touched, this is usually implicit in the page update
1412                                 // Other cache updates are done in onArticleEdit()
1413                                 $this->mTitle->invalidateCache();
1414                         }
1415
1416                         if( !$wgDBtransactions ) {
1417                                 ignore_user_abort( $userAbort );
1418                         }
1419
1420                         if ( $good ) {
1421                                 # Invalidate cache of this article and all pages using this article
1422                                 # as a template. Partly deferred.
1423                                 Article::onArticleEdit( $this->mTitle );
1424
1425                                 # Update links tables, site stats, etc.
1426                                 $changed = ( strcmp( $oldtext, $text ) != 0 );
1427                                 $this->editUpdates( $text, $summary, $isminor, $now, $revisionId, $changed );
1428                         }
1429                 } else {
1430                         # Create new article
1431
1432                         # Set statistics members
1433                         # We work out if it's countable after PST to avoid counter drift
1434                         # when articles are created with {{subst:}}
1435                         $this->mGoodAdjustment = (int)$this->isCountable( $text );
1436                         $this->mTotalAdjustment = 1;
1437
1438                         $dbw->begin();
1439
1440                         # Add the page record; stake our claim on this title!
1441                         # This will fail with a database query exception if the article already exists
1442                         $newid = $this->insertOn( $dbw );
1443
1444                         # Save the revision text...
1445                         $revision = new Revision( array(
1446                                 'page'       => $newid,
1447                                 'comment'    => $summary,
1448                                 'minor_edit' => $isminor,
1449                                 'text'       => $text
1450                                 ) );
1451                         $revisionId = $revision->insertOn( $dbw );
1452
1453                         $this->mTitle->resetArticleID( $newid );
1454
1455                         # Update the page record with revision data
1456                         $this->updateRevisionOn( $dbw, $revision, 0 );
1457
1458                         if( !( $flags & EDIT_SUPPRESS_RC ) ) {
1459                                 $rcid = RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary, $bot,
1460                                   '', strlen( $text ), $revisionId );
1461                                 # Mark as patrolled if the user can
1462                                 if( $GLOBALS['wgUseRCPatrol'] && $wgUser->isAllowed( 'autopatrol' ) ) {
1463                                         RecentChange::markPatrolled( $rcid );
1464                                         PatrolLog::record( $rcid, true );
1465                                 }
1466                         }
1467                         $wgUser->incEditCount();
1468                         $dbw->commit();
1469
1470                         # Update links, etc.
1471                         $this->editUpdates( $text, $summary, $isminor, $now, $revisionId, true );
1472
1473                         # Clear caches
1474                         Article::onArticleCreate( $this->mTitle );
1475
1476                         wfRunHooks( 'ArticleInsertComplete', array( &$this, &$wgUser, $text, $summary,
1477                          $flags & EDIT_MINOR, null, null, &$flags, $revision ) );
1478                 }
1479
1480                 if ( $good && !( $flags & EDIT_DEFER_UPDATES ) ) {
1481                         wfDoUpdates();
1482                 }
1483
1484                 wfRunHooks( 'ArticleSaveComplete', array( &$this, &$wgUser, $text, $summary,
1485                         $flags & EDIT_MINOR, null, null, &$flags, $revision ) );
1486
1487                 wfProfileOut( __METHOD__ );
1488                 return $good;
1489         }
1490
1491         /**
1492          * @deprecated wrapper for doRedirect
1493          */
1494         function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid ) {
1495                 $this->doRedirect( $this->isRedirect( $text ), $sectionanchor );
1496         }
1497
1498         /**
1499          * Output a redirect back to the article.
1500          * This is typically used after an edit.
1501          *
1502          * @param boolean $noRedir Add redirect=no
1503          * @param string $sectionAnchor section to redirect to, including "#"
1504          */
1505         function doRedirect( $noRedir = false, $sectionAnchor = '', $extraq = '' ) {
1506                 global $wgOut;
1507                 if ( $noRedir ) {
1508                         $query = 'redirect=no';
1509                         if( $extraq )
1510                                 $query .= "&$query";
1511                 } else {
1512                         $query = $extraq;
1513                 }
1514                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $sectionAnchor );
1515         }
1516
1517         /**
1518          * Mark this particular edit as patrolled
1519          */
1520         function markpatrolled() {
1521                 global $wgOut, $wgRequest, $wgUseRCPatrol, $wgUser;
1522                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1523
1524                 # Check RC patrol config. option
1525                 if( !$wgUseRCPatrol ) {
1526                         $wgOut->errorPage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1527                         return;
1528                 }
1529
1530                 # Check permissions
1531                 if( !$wgUser->isAllowed( 'patrol' ) ) {
1532                         $wgOut->permissionRequired( 'patrol' );
1533                         return;
1534                 }
1535
1536                 # If we haven't been given an rc_id value, we can't do anything
1537                 $rcid = $wgRequest->getVal( 'rcid' );
1538                 if( !$rcid ) {
1539                         $wgOut->errorPage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1540                         return;
1541                 }
1542
1543                 # Handle the 'MarkPatrolled' hook
1544                 if( !wfRunHooks( 'MarkPatrolled', array( $rcid, &$wgUser, false ) ) ) {
1545                         return;
1546                 }
1547
1548                 $return = SpecialPage::getTitleFor( 'Recentchanges' );
1549                 # If it's left up to us, check that the user is allowed to patrol this edit
1550                 # If the user has the "autopatrol" right, then we'll assume there are no
1551                 # other conditions stopping them doing so
1552                 if( !$wgUser->isAllowed( 'autopatrol' ) ) {
1553                         $rc = RecentChange::newFromId( $rcid );
1554                         # Graceful error handling, as we've done before here...
1555                         # (If the recent change doesn't exist, then it doesn't matter whether
1556                         # the user is allowed to patrol it or not; nothing is going to happen
1557                         if( is_object( $rc ) && $wgUser->getName() == $rc->getAttribute( 'rc_user_text' ) ) {
1558                                 # The user made this edit, and can't patrol it
1559                                 # Tell them so, and then back off
1560                                 $wgOut->setPageTitle( wfMsg( 'markedaspatrollederror' ) );
1561                                 $wgOut->addWikiText( wfMsgNoTrans( 'markedaspatrollederror-noautopatrol' ) );
1562                                 $wgOut->returnToMain( false, $return );
1563                                 return;
1564                         }
1565                 }
1566
1567                 # Mark the edit as patrolled
1568                 RecentChange::markPatrolled( $rcid );
1569                 PatrolLog::record( $rcid );
1570                 wfRunHooks( 'MarkPatrolledComplete', array( &$rcid, &$wgUser, false ) );
1571
1572                 # Inform the user
1573                 $wgOut->setPageTitle( wfMsg( 'markedaspatrolled' ) );
1574                 $wgOut->addWikiText( wfMsgNoTrans( 'markedaspatrolledtext' ) );
1575                 $wgOut->returnToMain( false, $return );
1576         }
1577
1578         /**
1579          * User-interface handler for the "watch" action
1580          */
1581
1582         function watch() {
1583
1584                 global $wgUser, $wgOut;
1585
1586                 if ( $wgUser->isAnon() ) {
1587                         $wgOut->showErrorPage( 'watchnologin', 'watchnologintext' );
1588                         return;
1589                 }
1590                 if ( wfReadOnly() ) {
1591                         $wgOut->readOnlyPage();
1592                         return;
1593                 }
1594
1595                 if( $this->doWatch() ) {
1596                         $wgOut->setPagetitle( wfMsg( 'addedwatch' ) );
1597                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
1598
1599                         $link = wfEscapeWikiText( $this->mTitle->getPrefixedText() );
1600                         $text = wfMsg( 'addedwatchtext', $link );
1601                         $wgOut->addWikiText( $text );
1602                 }
1603
1604                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1605         }
1606
1607         /**
1608          * Add this page to $wgUser's watchlist
1609          * @return bool true on successful watch operation
1610          */
1611         function doWatch() {
1612                 global $wgUser;
1613                 if( $wgUser->isAnon() ) {
1614                         return false;
1615                 }
1616
1617                 if (wfRunHooks('WatchArticle', array(&$wgUser, &$this))) {
1618                         $wgUser->addWatch( $this->mTitle );
1619
1620                         return wfRunHooks('WatchArticleComplete', array(&$wgUser, &$this));
1621                 }
1622
1623                 return false;
1624         }
1625
1626         /**
1627          * User interface handler for the "unwatch" action.
1628          */
1629         function unwatch() {
1630
1631                 global $wgUser, $wgOut;
1632
1633                 if ( $wgUser->isAnon() ) {
1634                         $wgOut->showErrorPage( 'watchnologin', 'watchnologintext' );
1635                         return;
1636                 }
1637                 if ( wfReadOnly() ) {
1638                         $wgOut->readOnlyPage();
1639                         return;
1640                 }
1641
1642                 if( $this->doUnwatch() ) {
1643                         $wgOut->setPagetitle( wfMsg( 'removedwatch' ) );
1644                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
1645
1646                         $link = wfEscapeWikiText( $this->mTitle->getPrefixedText() );
1647                         $text = wfMsg( 'removedwatchtext', $link );
1648                         $wgOut->addWikiText( $text );
1649                 }
1650
1651                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1652         }
1653
1654         /**
1655          * Stop watching a page
1656          * @return bool true on successful unwatch
1657          */
1658         function doUnwatch() {
1659                 global $wgUser;
1660                 if( $wgUser->isAnon() ) {
1661                         return false;
1662                 }
1663
1664                 if (wfRunHooks('UnwatchArticle', array(&$wgUser, &$this))) {
1665                         $wgUser->removeWatch( $this->mTitle );
1666
1667                         return wfRunHooks('UnwatchArticleComplete', array(&$wgUser, &$this));
1668                 }
1669
1670                 return false;
1671         }
1672
1673         /**
1674          * action=protect handler
1675          */
1676         function protect() {
1677                 $form = new ProtectionForm( $this );
1678                 $form->execute();
1679         }
1680
1681         /**
1682          * action=unprotect handler (alias)
1683          */
1684         function unprotect() {
1685                 $this->protect();
1686         }
1687
1688         /**
1689          * Update the article's restriction field, and leave a log entry.
1690          *
1691          * @param array $limit set of restriction keys
1692          * @param string $reason
1693          * @return bool true on success
1694          */
1695         function updateRestrictions( $limit = array(), $reason = '', $cascade = 0, $expiry = null ) {
1696                 global $wgUser, $wgRestrictionTypes, $wgContLang;
1697
1698                 $id = $this->mTitle->getArticleID();
1699                 if( !$wgUser->isAllowed( 'protect' ) || wfReadOnly() || $id == 0 ) {
1700                         return false;
1701                 }
1702
1703                 if (!$cascade) {
1704                         $cascade = false;
1705                 }
1706
1707                 // Take this opportunity to purge out expired restrictions
1708                 Title::purgeExpiredRestrictions();
1709
1710                 # FIXME: Same limitations as described in ProtectionForm.php (line 37);
1711                 # we expect a single selection, but the schema allows otherwise.
1712                 $current = array();
1713                 foreach( $wgRestrictionTypes as $action )
1714                         $current[$action] = implode( '', $this->mTitle->getRestrictions( $action ) );
1715
1716                 $current = Article::flattenRestrictions( $current );
1717                 $updated = Article::flattenRestrictions( $limit );
1718
1719                 $changed = ( $current != $updated );
1720                 $changed = $changed || ($this->mTitle->areRestrictionsCascading() != $cascade);
1721                 $changed = $changed || ($this->mTitle->mRestrictionsExpiry != $expiry);
1722                 $protect = ( $updated != '' );
1723
1724                 # If nothing's changed, do nothing
1725                 if( $changed ) {
1726                         global $wgGroupPermissions;
1727                         if( wfRunHooks( 'ArticleProtect', array( &$this, &$wgUser, $limit, $reason ) ) ) {
1728
1729                                 $dbw = wfGetDB( DB_MASTER );
1730
1731                                 $encodedExpiry = Block::encodeExpiry($expiry, $dbw );
1732
1733                                 $expiry_description = '';
1734                                 if ( $encodedExpiry != 'infinity' ) {
1735                                         $expiry_description = ' (' . wfMsgForContent( 'protect-expiring', $wgContLang->timeanddate( $expiry ) ).')';
1736                                 }
1737
1738                                 # Prepare a null revision to be added to the history
1739                                 $modified = $current != '' && $protect;
1740                                 if ( $protect ) {
1741                                         $comment_type = $modified ? 'modifiedarticleprotection' : 'protectedarticle';
1742                                 } else {
1743                                         $comment_type = 'unprotectedarticle';
1744                                 }
1745                                 $comment = $wgContLang->ucfirst( wfMsgForContent( $comment_type, $this->mTitle->getPrefixedText() ) );
1746
1747                                 foreach( $limit as $action => $restrictions ) {
1748                                         # Check if the group level required to edit also can protect pages
1749                                         # Otherwise, people who cannot normally protect can "protect" pages via transclusion
1750                                         $cascade = ( $cascade && isset($wgGroupPermissions[$restrictions]['protect']) && $wgGroupPermissions[$restrictions]['protect'] );
1751                                 }
1752
1753                                 $cascade_description = '';
1754                                 if ($cascade) {
1755                                         $cascade_description = ' ['.wfMsg('protect-summary-cascade').']';
1756                                 }
1757
1758                                 if( $reason )
1759                                         $comment .= ": $reason";
1760                                 if( $protect )
1761                                         $comment .= " [$updated]";
1762                                 if ( $expiry_description && $protect )
1763                                         $comment .= "$expiry_description";
1764                                 if ( $cascade )
1765                                         $comment .= "$cascade_description";
1766
1767                                 $nullRevision = Revision::newNullRevision( $dbw, $id, $comment, true );
1768                                 $nullRevId = $nullRevision->insertOn( $dbw );
1769
1770                                 # Update restrictions table
1771                                 foreach( $limit as $action => $restrictions ) {
1772                                         if ($restrictions != '' ) {
1773                                                 $dbw->replace( 'page_restrictions', array(array('pr_page', 'pr_type')),
1774                                                         array( 'pr_page' => $id, 'pr_type' => $action
1775                                                                 , 'pr_level' => $restrictions, 'pr_cascade' => $cascade ? 1 : 0
1776                                                                 , 'pr_expiry' => $encodedExpiry ), __METHOD__  );
1777                                         } else {
1778                                                 $dbw->delete( 'page_restrictions', array( 'pr_page' => $id,
1779                                                         'pr_type' => $action ), __METHOD__ );
1780                                         }
1781                                 }
1782
1783                                 # Update page record
1784                                 $dbw->update( 'page',
1785                                         array( /* SET */
1786                                                 'page_touched' => $dbw->timestamp(),
1787                                                 'page_restrictions' => '',
1788                                                 'page_latest' => $nullRevId
1789                                         ), array( /* WHERE */
1790                                                 'page_id' => $id
1791                                         ), 'Article::protect'
1792                                 );
1793                                 wfRunHooks( 'ArticleProtectComplete', array( &$this, &$wgUser, $limit, $reason ) );
1794
1795                                 # Update the protection log
1796                                 $log = new LogPage( 'protect' );
1797
1798                                 if( $protect ) {
1799                                         $log->addEntry( $modified ? 'modify' : 'protect', $this->mTitle, trim( $reason . " [$updated]$cascade_description$expiry_description" ) );
1800                                 } else {
1801                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1802                                 }
1803
1804                         } # End hook
1805                 } # End "changed" check
1806
1807                 return true;
1808         }
1809
1810         /**
1811          * Take an array of page restrictions and flatten it to a string
1812          * suitable for insertion into the page_restrictions field.
1813          * @param array $limit
1814          * @return string
1815          * @private
1816          */
1817         function flattenRestrictions( $limit ) {
1818                 if( !is_array( $limit ) ) {
1819                         throw new MWException( 'Article::flattenRestrictions given non-array restriction set' );
1820                 }
1821                 $bits = array();
1822                 ksort( $limit );
1823                 foreach( $limit as $action => $restrictions ) {
1824                         if( $restrictions != '' ) {
1825                                 $bits[] = "$action=$restrictions";
1826                         }
1827                 }
1828                 return implode( ':', $bits );
1829         }
1830
1831         /*
1832          * UI entry point for page deletion
1833          */
1834         function delete() {
1835                 global $wgUser, $wgOut, $wgRequest;
1836                 $confirm = $wgRequest->wasPosted() &&
1837                         $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
1838                 $reason = $wgRequest->getText( 'wpReason' );
1839
1840                 # This code desperately needs to be totally rewritten
1841
1842                 # Check permissions
1843                 if( $wgUser->isAllowed( 'delete' ) ) {
1844                         if( $wgUser->isBlocked( !$confirm ) ) {
1845                                 $wgOut->blockedPage();
1846                                 return;
1847                         }
1848                 } else {
1849                         $wgOut->permissionRequired( 'delete' );
1850                         return;
1851                 }
1852
1853                 if( wfReadOnly() ) {
1854                         $wgOut->readOnlyPage();
1855                         return;
1856                 }
1857
1858                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1859
1860                 # Better double-check that it hasn't been deleted yet!
1861                 $dbw = wfGetDB( DB_MASTER );
1862                 $conds = $this->mTitle->pageCond();
1863                 $latest = $dbw->selectField( 'page', 'page_latest', $conds, __METHOD__ );
1864                 if ( $latest === false ) {
1865                         $wgOut->showFatalError( wfMsg( 'cannotdelete' ) );
1866                         return;
1867                 }
1868
1869                 if( $confirm ) {
1870                         $this->doDelete( $reason );
1871                         if( $wgRequest->getCheck( 'wpWatch' ) ) {
1872                                 $this->doWatch();
1873                         } elseif( $this->mTitle->userIsWatching() ) {
1874                                 $this->doUnwatch();
1875                         }
1876                         return;
1877                 }
1878
1879                 # determine whether this page has earlier revisions
1880                 # and insert a warning if it does
1881                 $maxRevisions = 20;
1882                 $authors = $this->getLastNAuthors( $maxRevisions, $latest );
1883
1884                 if( count( $authors ) > 1 && !$confirm ) {
1885                         $skin=$wgUser->getSkin();
1886                         $wgOut->addHTML( '<strong>' . wfMsg( 'historywarning' ) . ' ' . $skin->historyLink() . '</strong>' );
1887                 }
1888
1889                 # If a single user is responsible for all revisions, find out who they are
1890                 if ( count( $authors ) == $maxRevisions ) {
1891                         // Query bailed out, too many revisions to find out if they're all the same
1892                         $authorOfAll = false;
1893                 } else {
1894                         $authorOfAll = reset( $authors );
1895                         foreach ( $authors as $author ) {
1896                                 if ( $authorOfAll != $author ) {
1897                                         $authorOfAll = false;
1898                                         break;
1899                                 }
1900                         }
1901                 }
1902                 # Fetch article text
1903                 $rev = Revision::newFromTitle( $this->mTitle );
1904
1905                 if( !is_null( $rev ) ) {
1906                         # if this is a mini-text, we can paste part of it into the deletion reason
1907                         $text = $rev->getText();
1908
1909                         #if this is empty, an earlier revision may contain "useful" text
1910                         $blanked = false;
1911                         if( $text == '' ) {
1912                                 $prev = $rev->getPrevious();
1913                                 if( $prev ) {
1914                                         $text = $prev->getText();
1915                                         $blanked = true;
1916                                 }
1917                         }
1918
1919                         $length = strlen( $text );
1920
1921                         # this should not happen, since it is not possible to store an empty, new
1922                         # page. Let's insert a standard text in case it does, though
1923                         if( $length == 0 && $reason === '' ) {
1924                                 $reason = wfMsgForContent( 'exblank' );
1925                         }
1926
1927                         if( $reason === '' ) {
1928                                 # comment field=255, let's grep the first 150 to have some user
1929                                 # space left
1930                                 global $wgContLang;
1931                                 $text = $wgContLang->truncate( $text, 150, '...' );
1932
1933                                 # let's strip out newlines
1934                                 $text = preg_replace( "/[\n\r]/", '', $text );
1935
1936                                 if( !$blanked ) {
1937                                         if( $authorOfAll === false ) {
1938                                                 $reason = wfMsgForContent( 'excontent', $text );
1939                                         } else {
1940                                                 $reason = wfMsgForContent( 'excontentauthor', $text, $authorOfAll );
1941                                         }
1942                                 } else {
1943                                         $reason = wfMsgForContent( 'exbeforeblank', $text );
1944                                 }
1945                         }
1946                 }
1947
1948                 return $this->confirmDelete( '', $reason );
1949         }
1950
1951         /**
1952          * Get the last N authors
1953          * @param int $num Number of revisions to get
1954          * @param string $revLatest The latest rev_id, selected from the master (optional)
1955          * @return array Array of authors, duplicates not removed
1956          */
1957         function getLastNAuthors( $num, $revLatest = 0 ) {
1958                 wfProfileIn( __METHOD__ );
1959
1960                 // First try the slave
1961                 // If that doesn't have the latest revision, try the master
1962                 $continue = 2;
1963                 $db = wfGetDB( DB_SLAVE );
1964                 do {
1965                         $res = $db->select( array( 'page', 'revision' ),
1966                                 array( 'rev_id', 'rev_user_text' ),
1967                                 array(
1968                                         'page_namespace' => $this->mTitle->getNamespace(),
1969                                         'page_title' => $this->mTitle->getDBkey(),
1970                                         'rev_page = page_id'
1971                                 ), __METHOD__, $this->getSelectOptions( array(
1972                                         'ORDER BY' => 'rev_timestamp DESC',
1973                                         'LIMIT' => $num
1974                                 ) )
1975                         );
1976                         if ( !$res ) {
1977                                 wfProfileOut( __METHOD__ );
1978                                 return array();
1979                         }
1980                         $row = $db->fetchObject( $res );
1981                         if ( $continue == 2 && $revLatest && $row->rev_id != $revLatest ) {
1982                                 $db = wfGetDB( DB_MASTER );
1983                                 $continue--;
1984                         } else {
1985                                 $continue = 0;
1986                         }
1987                 } while ( $continue );
1988
1989                 $authors = array( $row->rev_user_text );
1990                 while ( $row = $db->fetchObject( $res ) ) {
1991                         $authors[] = $row->rev_user_text;
1992                 }
1993                 wfProfileOut( __METHOD__ );
1994                 return $authors;
1995         }
1996
1997         /**
1998          * Output deletion confirmation dialog
1999          */
2000         function confirmDelete( $par, $reason ) {
2001                 global $wgOut, $wgUser;
2002
2003                 wfDebug( "Article::confirmDelete\n" );
2004
2005                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
2006                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
2007                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
2008                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
2009
2010                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
2011
2012                 $confirm = htmlspecialchars( wfMsg( 'deletepage' ) );
2013                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
2014                 $token = htmlspecialchars( $wgUser->editToken() );
2015                 $watch = Xml::checkLabel( wfMsg( 'watchthis' ), 'wpWatch', 'wpWatch', $wgUser->getBoolOption( 'watchdeletion' ) || $this->mTitle->userIsWatching(), array( 'tabindex' => '2' ) );
2016
2017                 $wgOut->addHTML( "
2018 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
2019         <table border='0'>
2020                 <tr>
2021                         <td align='right'>
2022                                 <label for='wpReason'>{$delcom}:</label>
2023                         </td>
2024                         <td align='left'>
2025                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" tabindex=\"1\" />
2026                         </td>
2027                 </tr>
2028                 <tr>
2029                         <td>&nbsp;</td>
2030                         <td>$watch</td>
2031                 </tr>
2032                 <tr>
2033                         <td>&nbsp;</td>
2034                         <td>
2035                                 <input type='submit' name='wpConfirmB' id='wpConfirmB' value=\"{$confirm}\" tabindex=\"3\" />
2036                         </td>
2037                 </tr>
2038         </table>
2039         <input type='hidden' name='wpEditToken' value=\"{$token}\" />
2040 </form>\n" );
2041
2042                 $wgOut->returnToMain( false );
2043
2044                 $this->showLogExtract( $wgOut );
2045         }
2046
2047
2048         /**
2049          * Show relevant lines from the deletion log
2050          */
2051         function showLogExtract( $out ) {
2052                 $out->addHtml( '<h2>' . htmlspecialchars( LogPage::logName( 'delete' ) ) . '</h2>' );
2053                 $logViewer = new LogViewer(
2054                         new LogReader(
2055                                 new FauxRequest(
2056                                         array( 'page' => $this->mTitle->getPrefixedText(),
2057                                                'type' => 'delete' ) ) ) );
2058                 $logViewer->showList( $out );
2059         }
2060
2061
2062         /**
2063          * Perform a deletion and output success or failure messages
2064          */
2065         function doDelete( $reason ) {
2066                 global $wgOut, $wgUser;
2067                 wfDebug( __METHOD__."\n" );
2068
2069                 if (wfRunHooks('ArticleDelete', array(&$this, &$wgUser, &$reason))) {
2070                         if ( $this->doDeleteArticle( $reason ) ) {
2071                                 $deleted = wfEscapeWikiText( $this->mTitle->getPrefixedText() );
2072
2073                                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
2074                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
2075
2076                                 $loglink = '[[Special:Log/delete|' . wfMsg( 'deletionlog' ) . ']]';
2077                                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
2078
2079                                 $wgOut->addWikiText( $text );
2080                                 $wgOut->returnToMain( false );
2081                                 wfRunHooks('ArticleDeleteComplete', array(&$this, &$wgUser, $reason));
2082                         } else {
2083                                 $wgOut->showFatalError( wfMsg( 'cannotdelete' ) );
2084                         }
2085                 }
2086         }
2087
2088         /**
2089          * Back-end article deletion
2090          * Deletes the article with database consistency, writes logs, purges caches
2091          * Returns success
2092          */
2093         function doDeleteArticle( $reason ) {
2094                 global $wgUseSquid, $wgDeferredUpdateList;
2095                 global $wgUseTrackbacks;
2096
2097                 wfDebug( __METHOD__."\n" );
2098
2099                 $dbw = wfGetDB( DB_MASTER );
2100                 $ns = $this->mTitle->getNamespace();
2101                 $t = $this->mTitle->getDBkey();
2102                 $id = $this->mTitle->getArticleID();
2103
2104                 if ( $t == '' || $id == 0 ) {
2105                         return false;
2106                 }
2107
2108                 $u = new SiteStatsUpdate( 0, 1, -(int)$this->isCountable( $this->getContent() ), -1 );
2109                 array_push( $wgDeferredUpdateList, $u );
2110
2111                 // For now, shunt the revision data into the archive table.
2112                 // Text is *not* removed from the text table; bulk storage
2113                 // is left intact to avoid breaking block-compression or
2114                 // immutable storage schemes.
2115                 //
2116                 // For backwards compatibility, note that some older archive
2117                 // table entries will have ar_text and ar_flags fields still.
2118                 //
2119                 // In the future, we may keep revisions and mark them with
2120                 // the rev_deleted field, which is reserved for this purpose.
2121                 $dbw->insertSelect( 'archive', array( 'page', 'revision' ),
2122                         array(
2123                                 'ar_namespace'  => 'page_namespace',
2124                                 'ar_title'      => 'page_title',
2125                                 'ar_comment'    => 'rev_comment',
2126                                 'ar_user'       => 'rev_user',
2127                                 'ar_user_text'  => 'rev_user_text',
2128                                 'ar_timestamp'  => 'rev_timestamp',
2129                                 'ar_minor_edit' => 'rev_minor_edit',
2130                                 'ar_rev_id'     => 'rev_id',
2131                                 'ar_text_id'    => 'rev_text_id',
2132                                 'ar_text'       => '\'\'', // Be explicit to appease
2133                                 'ar_flags'      => '\'\'', // MySQL's "strict mode"...
2134                                 'ar_len'                => 'rev_len',
2135                                 'ar_page_id'    => 'page_id',
2136                         ), array(
2137                                 'page_id' => $id,
2138                                 'page_id = rev_page'
2139                         ), __METHOD__
2140                 );
2141
2142                 # Delete restrictions for it
2143                 $dbw->delete( 'page_restrictions', array ( 'pr_page' => $id ), __METHOD__ );
2144
2145                 # Now that it's safely backed up, delete it
2146                 $dbw->delete( 'page', array( 'page_id' => $id ), __METHOD__);
2147
2148                 # If using cascading deletes, we can skip some explicit deletes
2149                 if ( !$dbw->cascadingDeletes() ) {
2150
2151                         $dbw->delete( 'revision', array( 'rev_page' => $id ), __METHOD__ );
2152
2153                         if ($wgUseTrackbacks)
2154                                 $dbw->delete( 'trackbacks', array( 'tb_page' => $id ), __METHOD__ );
2155
2156                         # Delete outgoing links
2157                         $dbw->delete( 'pagelinks', array( 'pl_from' => $id ) );
2158                         $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
2159                         $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
2160                         $dbw->delete( 'templatelinks', array( 'tl_from' => $id ) );
2161                         $dbw->delete( 'externallinks', array( 'el_from' => $id ) );
2162                         $dbw->delete( 'langlinks', array( 'll_from' => $id ) );
2163                         $dbw->delete( 'redirect', array( 'rd_from' => $id ) );
2164                 }
2165
2166                 # If using cleanup triggers, we can skip some manual deletes
2167                 if ( !$dbw->cleanupTriggers() ) {
2168
2169                         # Clean up recentchanges entries...
2170                         $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), __METHOD__ );
2171                 }
2172
2173                 # Clear caches
2174                 Article::onArticleDelete( $this->mTitle );
2175
2176                 # Log the deletion
2177                 $log = new LogPage( 'delete' );
2178                 $log->addEntry( 'delete', $this->mTitle, $reason );
2179
2180                 # Clear the cached article id so the interface doesn't act like we exist
2181                 $this->mTitle->resetArticleID( 0 );
2182                 $this->mTitle->mArticleID = 0;
2183                 return true;
2184         }
2185
2186         /**
2187          * Roll back the most recent consecutive set of edits to a page
2188          * from the same user; fails if there are no eligible edits to
2189          * roll back to, e.g. user is the sole contributor
2190          *
2191          * @param string $fromP - Name of the user whose edits to rollback.
2192          * @param string $summary - Custom summary. Set to default summary if empty.
2193          * @param string $token - Rollback token.
2194          * @param bool $bot - If true, mark all reverted edits as bot.
2195          *
2196          * @param array $resultDetails contains result-specific dict of additional values
2197          *    ALREADY_ROLLED : 'current' (rev)
2198          *    SUCCESS        : 'summary' (str), 'current' (rev), 'target' (rev)
2199          *
2200          * @return self::SUCCESS on succes, self::* on failure
2201          */
2202         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails ) {
2203                 global $wgUser, $wgUseRCPatrol;
2204                 $resultDetails = null;
2205
2206                 if( $wgUser->isAllowed( 'rollback' ) ) {
2207                         if( $wgUser->isBlocked() ) {
2208                                 return self::BLOCKED;
2209                         }
2210                 } else {
2211                         return self::PERM_DENIED;
2212                 }
2213
2214                 if ( wfReadOnly() ) {
2215                         return self::READONLY;
2216                 }
2217                 if( !$wgUser->matchEditToken( $token, array( $this->mTitle->getPrefixedText(), $fromP ) ) )
2218                         return self::BAD_TOKEN;
2219
2220                 $dbw = wfGetDB( DB_MASTER );
2221
2222                 # Get the last editor
2223                 $current = Revision::newFromTitle( $this->mTitle );
2224                 if( is_null( $current ) ) {
2225                         # Something wrong... no page?
2226                         return self::BAD_TITLE;
2227                 }
2228
2229                 $from = str_replace( '_', ' ', $fromP );
2230                 if( $from != $current->getUserText() ) {
2231                         $resultDetails = array( 'current' => $current );
2232                         return self::ALREADY_ROLLED;
2233                 }
2234
2235                 # Get the last edit not by this guy
2236                 $user = intval( $current->getUser() );
2237                 $user_text = $dbw->addQuotes( $current->getUserText() );
2238                 $s = $dbw->selectRow( 'revision',
2239                         array( 'rev_id', 'rev_timestamp' ),
2240                         array(
2241                                 'rev_page' => $current->getPage(),
2242                                 "rev_user <> {$user} OR rev_user_text <> {$user_text}"
2243                         ), __METHOD__,
2244                         array(
2245                                 'USE INDEX' => 'page_timestamp',
2246                                 'ORDER BY'  => 'rev_timestamp DESC' )
2247                         );
2248                 if( $s === false ) {
2249                         # Something wrong
2250                         return self::ONLY_AUTHOR;
2251                 }
2252
2253                 $set = array();
2254                 if ( $bot ) {
2255                         # Mark all reverted edits as bot
2256                         $set['rc_bot'] = 1;
2257                 }
2258                 if ( $wgUseRCPatrol ) {
2259                         # Mark all reverted edits as patrolled
2260                         $set['rc_patrolled'] = 1;
2261                 }
2262
2263                 if ( $set ) {
2264                         $dbw->update( 'recentchanges', $set,
2265                                         array( /* WHERE */
2266                                                 'rc_cur_id' => $current->getPage(),
2267                                                 'rc_user_text' => $current->getUserText(),
2268                                                 "rc_timestamp > '{$s->rev_timestamp}'",
2269                                         ), __METHOD__
2270                                 );
2271                 }
2272
2273                 # Get the edit summary
2274                 $target = Revision::newFromId( $s->rev_id );
2275                 if( empty( $summary ) )
2276                         $summary = wfMsgForContent( 'revertpage', $target->getUserText(), $from );
2277
2278                 # Save
2279                 $flags = EDIT_UPDATE | EDIT_MINOR;
2280                 if( $bot )
2281                         $flags |= EDIT_FORCE_BOT;
2282                 $this->doEdit( $target->getText(), $summary, $flags );
2283
2284                 $resultDetails = array(
2285                         'summary' => $summary,
2286                         'current' => $current,
2287                         'target' => $target,
2288                 );
2289                 return self::SUCCESS;
2290         }
2291
2292         /**
2293          * User interface for rollback operations
2294          */
2295         function rollback() {
2296                 global $wgUser, $wgOut, $wgRequest, $wgUseRCPatrol;
2297
2298                 $details = null;
2299                 $result = $this->doRollback(
2300                         $wgRequest->getVal( 'from' ),
2301                         $wgRequest->getText( 'summary' ),
2302                         $wgRequest->getVal( 'token' ),
2303                         $wgRequest->getBool( 'bot' ),
2304                         $details
2305                 );
2306
2307                 switch( $result ) {
2308                         case self::BLOCKED:
2309                                 $wgOut->blockedPage();
2310                                 break;
2311                         case self::PERM_DENIED:
2312                                 $wgOut->permissionRequired( 'rollback' );
2313                                 break;
2314                         case self::READONLY:
2315                                 $wgOut->readOnlyPage( $this->getContent() );
2316                                 break;
2317                         case self::BAD_TOKEN:
2318                                 $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
2319                                 $wgOut->addWikiText( wfMsg( 'sessionfailure' ) );
2320                                 break;
2321                         case self::BAD_TITLE:
2322                                 $wgOut->addHtml( wfMsg( 'notanarticle' ) );
2323                                 break;
2324                         case self::ALREADY_ROLLED:
2325                                 $current = $details['current'];
2326                                 $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
2327                                 $wgOut->addWikiText(
2328                                         wfMsg( 'alreadyrolled',
2329                                                 htmlspecialchars( $this->mTitle->getPrefixedText() ),
2330                                                 htmlspecialchars( $wgRequest->getVal( 'from' ) ),
2331                                                 htmlspecialchars( $current->getUserText() )
2332                                         )
2333                                 );
2334                                 if( $current->getComment() != '' ) {
2335                                         $wgOut->addHtml( wfMsg( 'editcomment',
2336                                                 $wgUser->getSkin()->formatComment( $current->getComment() ) ) );
2337                                 }
2338                                 break;
2339                         case self::ONLY_AUTHOR:
2340                                 $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
2341                                 $wgOut->addHtml( wfMsg( 'cantrollback' ) );
2342                                 break;
2343                         case self::SUCCESS:
2344                                 $current = $details['current'];
2345                                 $target = $details['target'];
2346                                 $wgOut->setPageTitle( wfMsg( 'actioncomplete' ) );
2347                                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2348                                 $old = $wgUser->getSkin()->userLink( $current->getUser(), $current->getUserText() )
2349                                         . $wgUser->getSkin()->userToolLinks( $current->getUser(), $current->getUserText() );
2350                                 $new = $wgUser->getSkin()->userLink( $target->getUser(), $target->getUserText() )
2351                                         . $wgUser->getSkin()->userToolLinks( $target->getUser(), $target->getUserText() );
2352                                 $wgOut->addHtml( wfMsgExt( 'rollback-success', array( 'parse', 'replaceafter' ), $old, $new ) );
2353                                 $wgOut->returnToMain( false, $this->mTitle );
2354                                 break;
2355                         default:
2356                                 throw new MWException( __METHOD__ . ": Unknown return value `{$result}`" );
2357                 }
2358
2359         }
2360
2361
2362         /**
2363          * Do standard deferred updates after page view
2364          * @private
2365          */
2366         function viewUpdates() {
2367                 global $wgDeferredUpdateList;
2368
2369                 if ( 0 != $this->getID() ) {
2370                         global $wgDisableCounters;
2371                         if( !$wgDisableCounters ) {
2372                                 Article::incViewCount( $this->getID() );
2373                                 $u = new SiteStatsUpdate( 1, 0, 0 );
2374                                 array_push( $wgDeferredUpdateList, $u );
2375                         }
2376                 }
2377
2378                 # Update newtalk / watchlist notification status
2379                 global $wgUser;
2380                 $wgUser->clearNotification( $this->mTitle );
2381         }
2382
2383         /**
2384          * Do standard deferred updates after page edit.
2385          * Update links tables, site stats, search index and message cache.
2386          * Every 1000th edit, prune the recent changes table.
2387          *
2388          * @private
2389          * @param $text New text of the article
2390          * @param $summary Edit summary
2391          * @param $minoredit Minor edit
2392          * @param $timestamp_of_pagechange Timestamp associated with the page change
2393          * @param $newid rev_id value of the new revision
2394          * @param $changed Whether or not the content actually changed
2395          */
2396         function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange, $newid, $changed = true ) {
2397                 global $wgDeferredUpdateList, $wgMessageCache, $wgUser, $wgParser;
2398
2399                 wfProfileIn( __METHOD__ );
2400
2401                 # Parse the text
2402                 $options = new ParserOptions;
2403                 $options->setTidy(true);
2404                 $poutput = $wgParser->parse( $text, $this->mTitle, $options, true, true, $newid );
2405
2406                 # Save it to the parser cache
2407                 $parserCache =& ParserCache::singleton();
2408                 $parserCache->save( $poutput, $this, $wgUser );
2409
2410                 # Update the links tables
2411                 $u = new LinksUpdate( $this->mTitle, $poutput );
2412                 $u->doUpdate();
2413
2414                 if( wfRunHooks( 'ArticleEditUpdatesDeleteFromRecentchanges', array( &$this ) ) ) {
2415                         if ( 0 == mt_rand( 0, 99 ) ) {
2416                                 // Flush old entries from the `recentchanges` table; we do this on
2417                                 // random requests so as to avoid an increase in writes for no good reason
2418                                 global $wgRCMaxAge;
2419                                 $dbw = wfGetDB( DB_MASTER );
2420                                 $cutoff = $dbw->timestamp( time() - $wgRCMaxAge );
2421                                 $recentchanges = $dbw->tableName( 'recentchanges' );
2422                                 $sql = "DELETE FROM $recentchanges WHERE rc_timestamp < '{$cutoff}'";
2423                                 $dbw->query( $sql );
2424                         }
2425                 }
2426
2427                 $id = $this->getID();
2428                 $title = $this->mTitle->getPrefixedDBkey();
2429                 $shortTitle = $this->mTitle->getDBkey();
2430
2431                 if ( 0 == $id ) {
2432                         wfProfileOut( __METHOD__ );
2433                         return;
2434                 }
2435
2436                 $u = new SiteStatsUpdate( 0, 1, $this->mGoodAdjustment, $this->mTotalAdjustment );
2437                 array_push( $wgDeferredUpdateList, $u );
2438                 $u = new SearchUpdate( $id, $title, $text );
2439                 array_push( $wgDeferredUpdateList, $u );
2440
2441                 # If this is another user's talk page, update newtalk
2442                 # Don't do this if $changed = false otherwise some idiot can null-edit a
2443                 # load of user talk pages and piss people off, nor if it's a minor edit
2444                 # by a properly-flagged bot.
2445                 if( $this->mTitle->getNamespace() == NS_USER_TALK && $shortTitle != $wgUser->getTitleKey() && $changed
2446                         && !($minoredit && $wgUser->isAllowed('nominornewtalk') ) ) {
2447                         if (wfRunHooks('ArticleEditUpdateNewTalk', array(&$this)) ) {
2448                                 $other = User::newFromName( $shortTitle );
2449                                 if( is_null( $other ) && User::isIP( $shortTitle ) ) {
2450                                         // An anonymous user
2451                                         $other = new User();
2452                                         $other->setName( $shortTitle );
2453                                 }
2454                                 if( $other ) {
2455                                         $other->setNewtalk( true );
2456                                 }
2457                         }
2458                 }
2459
2460                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
2461                         $wgMessageCache->replace( $shortTitle, $text );
2462                 }
2463
2464                 wfProfileOut( __METHOD__ );
2465         }
2466
2467         /**
2468          * Perform article updates on a special page creation.
2469          *
2470          * @param Revision $rev
2471          *
2472          * @todo This is a shitty interface function. Kill it and replace the
2473          * other shitty functions like editUpdates and such so it's not needed
2474          * anymore.
2475          */
2476         function createUpdates( $rev ) {
2477                 $this->mGoodAdjustment = $this->isCountable( $rev->getText() );
2478                 $this->mTotalAdjustment = 1;
2479                 $this->editUpdates( $rev->getText(), $rev->getComment(),
2480                         $rev->isMinor(), wfTimestamp(), $rev->getId(), true );
2481         }
2482
2483         /**
2484          * Generate the navigation links when browsing through an article revisions
2485          * It shows the information as:
2486          *   Revision as of \<date\>; view current revision
2487          *   \<- Previous version | Next Version -\>
2488          *
2489          * @private
2490          * @param string $oldid         Revision ID of this article revision
2491          */
2492         function setOldSubtitle( $oldid=0 ) {
2493                 global $wgLang, $wgOut, $wgUser;
2494
2495                 if ( !wfRunHooks( 'DisplayOldSubtitle', array(&$this, &$oldid) ) ) {
2496                                 return;
2497                 }
2498
2499                 $revision = Revision::newFromId( $oldid );
2500
2501                 $current = ( $oldid == $this->mLatest );
2502                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
2503                 $sk = $wgUser->getSkin();
2504                 $lnk = $current
2505                         ? wfMsg( 'currentrevisionlink' )
2506                         : $lnk = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
2507                 $curdiff = $current
2508                         ? wfMsg( 'diff' )
2509                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'diff' ), 'diff=cur&oldid='.$oldid );
2510                 $prev = $this->mTitle->getPreviousRevisionID( $oldid ) ;
2511                 $prevlink = $prev
2512                         ? $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid )
2513                         : wfMsg( 'previousrevision' );
2514                 $prevdiff = $prev
2515                         ? $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'diff' ), 'diff=prev&oldid='.$oldid )
2516                         : wfMsg( 'diff' );
2517                 $nextlink = $current
2518                         ? wfMsg( 'nextrevision' )
2519                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
2520                 $nextdiff = $current
2521                         ? wfMsg( 'diff' )
2522                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'diff' ), 'diff=next&oldid='.$oldid );
2523
2524                 $userlinks = $sk->userLink( $revision->getUser(), $revision->getUserText() )
2525                                                 . $sk->userToolLinks( $revision->getUser(), $revision->getUserText() );
2526
2527                 $m = wfMsg( 'revision-info-current' );
2528                 $infomsg = $current && !wfEmptyMsg( 'revision-info-current', $m ) && $m != '-'
2529                         ? 'revision-info-current'
2530                         : 'revision-info';
2531
2532                 $r = "\n\t\t\t\t<div id=\"mw-{$infomsg}\">" . wfMsg( $infomsg, $td, $userlinks ) . "</div>\n" .
2533                      "\n\t\t\t\t<div id=\"mw-revision-nav\">" . wfMsg( 'revision-nav', $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff ) . "</div>\n\t\t\t";
2534                 $wgOut->setSubtitle( $r );
2535         }
2536
2537         /**
2538          * This function is called right before saving the wikitext,
2539          * so we can do things like signatures and links-in-context.
2540          *
2541          * @param string $text
2542          */
2543         function preSaveTransform( $text ) {
2544                 global $wgParser, $wgUser;
2545                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
2546         }
2547
2548         /* Caching functions */
2549
2550         /**
2551          * checkLastModified returns true if it has taken care of all
2552          * output to the client that is necessary for this request.
2553          * (that is, it has sent a cached version of the page)
2554          */
2555         function tryFileCache() {
2556                 static $called = false;
2557                 if( $called ) {
2558                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
2559                         return;
2560                 }
2561                 $called = true;
2562                 if($this->isFileCacheable()) {
2563                         $touched = $this->mTouched;
2564                         $cache = new HTMLFileCache( $this->mTitle );
2565                         if($cache->isFileCacheGood( $touched )) {
2566                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
2567                                 $cache->loadFromFileCache();
2568                                 return true;
2569                         } else {
2570                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
2571                                 ob_start( array(&$cache, 'saveToFileCache' ) );
2572                         }
2573                 } else {
2574                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
2575                 }
2576         }
2577
2578         /**
2579          * Check if the page can be cached
2580          * @return bool
2581          */
2582         function isFileCacheable() {
2583                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest, $wgLang, $wgContLang;
2584                 $action    = $wgRequest->getVal( 'action'    );
2585                 $oldid     = $wgRequest->getVal( 'oldid'     );
2586                 $diff      = $wgRequest->getVal( 'diff'      );
2587                 $redirect  = $wgRequest->getVal( 'redirect'  );
2588                 $printable = $wgRequest->getVal( 'printable' );
2589                 $page      = $wgRequest->getVal( 'page' );
2590
2591                 //check for non-standard user language; this covers uselang,
2592                 //and extensions for auto-detecting user language.
2593                 $ulang     = $wgLang->getCode();
2594                 $clang     = $wgContLang->getCode();
2595
2596                 $cacheable = $wgUseFileCache
2597                         && (!$wgShowIPinHeader)
2598                         && ($this->getID() != 0)
2599                         && ($wgUser->isAnon())
2600                         && (!$wgUser->getNewtalk())
2601                         && ($this->mTitle->getNamespace() != NS_SPECIAL )
2602                         && (empty( $action ) || $action == 'view')
2603                         && (!isset($oldid))
2604                         && (!isset($diff))
2605                         && (!isset($redirect))
2606                         && (!isset($printable))
2607                         && !isset($page)
2608                         && (!$this->mRedirectedFrom)
2609                         && ($ulang === $clang);
2610
2611                 if ( $cacheable ) {
2612                         //extension may have reason to disable file caching on some pages.
2613                         $cacheable = wfRunHooks( 'IsFileCacheable', array( $this ) );
2614                 }
2615
2616                 return $cacheable;
2617         }
2618
2619         /**
2620          * Loads page_touched and returns a value indicating if it should be used
2621          *
2622          */
2623         function checkTouched() {
2624                 if( !$this->mDataLoaded ) {
2625                         $this->loadPageData();
2626                 }
2627                 return !$this->mIsRedirect;
2628         }
2629
2630         /**
2631          * Get the page_touched field
2632          */
2633         function getTouched() {
2634                 # Ensure that page data has been loaded
2635                 if( !$this->mDataLoaded ) {
2636                         $this->loadPageData();
2637                 }
2638                 return $this->mTouched;
2639         }
2640
2641         /**
2642          * Get the page_latest field
2643          */
2644         function getLatest() {
2645                 if ( !$this->mDataLoaded ) {
2646                         $this->loadPageData();
2647                 }
2648                 return $this->mLatest;
2649         }
2650
2651         /**
2652          * Edit an article without doing all that other stuff
2653          * The article must already exist; link tables etc
2654          * are not updated, caches are not flushed.
2655          *
2656          * @param string $text text submitted
2657          * @param string $comment comment submitted
2658          * @param bool $minor whereas it's a minor modification
2659          */
2660         function quickEdit( $text, $comment = '', $minor = 0 ) {
2661                 wfProfileIn( __METHOD__ );
2662
2663                 $dbw = wfGetDB( DB_MASTER );
2664                 $dbw->begin();
2665                 $revision = new Revision( array(
2666                         'page'       => $this->getId(),
2667                         'text'       => $text,
2668                         'comment'    => $comment,
2669                         'minor_edit' => $minor ? 1 : 0,
2670                         ) );
2671                 $revision->insertOn( $dbw );
2672                 $this->updateRevisionOn( $dbw, $revision );
2673                 $dbw->commit();
2674
2675                 wfProfileOut( __METHOD__ );
2676         }
2677
2678         /**
2679          * Used to increment the view counter
2680          *
2681          * @static
2682          * @param integer $id article id
2683          */
2684         function incViewCount( $id ) {
2685                 $id = intval( $id );
2686                 global $wgHitcounterUpdateFreq, $wgDBtype;
2687
2688                 $dbw = wfGetDB( DB_MASTER );
2689                 $pageTable = $dbw->tableName( 'page' );
2690                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
2691                 $acchitsTable = $dbw->tableName( 'acchits' );
2692
2693                 if( $wgHitcounterUpdateFreq <= 1 ) {
2694                         $dbw->query( "UPDATE $pageTable SET page_counter = page_counter + 1 WHERE page_id = $id" );
2695                         return;
2696                 }
2697
2698                 # Not important enough to warrant an error page in case of failure
2699                 $oldignore = $dbw->ignoreErrors( true );
2700
2701                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2702
2703                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2704                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2705                         # Most of the time (or on SQL errors), skip row count check
2706                         $dbw->ignoreErrors( $oldignore );
2707                         return;
2708                 }
2709
2710                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2711                 $row = $dbw->fetchObject( $res );
2712                 $rown = intval( $row->n );
2713                 if( $rown >= $wgHitcounterUpdateFreq ){
2714                         wfProfileIn( 'Article::incViewCount-collect' );
2715                         $old_user_abort = ignore_user_abort( true );
2716
2717                         if ($wgDBtype == 'mysql')
2718                                 $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2719                         $tabletype = $wgDBtype == 'mysql' ? "ENGINE=HEAP " : '';
2720                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable $tabletype AS ".
2721                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2722                                 'GROUP BY hc_id');
2723                         $dbw->query("DELETE FROM $hitcounterTable");
2724                         if ($wgDBtype == 'mysql') {
2725                                 $dbw->query('UNLOCK TABLES');
2726                                 $dbw->query("UPDATE $pageTable,$acchitsTable SET page_counter=page_counter + hc_n ".
2727                                         'WHERE page_id = hc_id');
2728                         }
2729                         else {
2730                                 $dbw->query("UPDATE $pageTable SET page_counter=page_counter + hc_n ".
2731                                         "FROM $acchitsTable WHERE page_id = hc_id");
2732                         }
2733                         $dbw->query("DROP TABLE $acchitsTable");
2734
2735                         ignore_user_abort( $old_user_abort );
2736                         wfProfileOut( 'Article::incViewCount-collect' );
2737                 }
2738                 $dbw->ignoreErrors( $oldignore );
2739         }
2740
2741         /**#@+
2742          * The onArticle*() functions are supposed to be a kind of hooks
2743          * which should be called whenever any of the specified actions
2744          * are done.
2745          *
2746          * This is a good place to put code to clear caches, for instance.
2747          *
2748          * This is called on page move and undelete, as well as edit
2749          * @static
2750          * @param $title_obj a title object
2751          */
2752
2753         static function onArticleCreate($title) {
2754                 # The talk page isn't in the regular link tables, so we need to update manually:
2755                 if ( $title->isTalkPage() ) {
2756                         $other = $title->getSubjectPage();
2757                 } else {
2758                         $other = $title->getTalkPage();
2759                 }
2760                 $other->invalidateCache();
2761                 $other->purgeSquid();
2762
2763                 $title->touchLinks();
2764                 $title->purgeSquid();
2765         }
2766
2767         static function onArticleDelete( $title ) {
2768                 global $wgUseFileCache, $wgMessageCache;
2769
2770                 $title->touchLinks();
2771                 $title->purgeSquid();
2772
2773                 # File cache
2774                 if ( $wgUseFileCache ) {
2775                         $cm = new HTMLFileCache( $title );
2776                         @unlink( $cm->fileCacheName() );
2777                 }
2778
2779                 if( $title->getNamespace() == NS_MEDIAWIKI) {
2780                         $wgMessageCache->replace( $title->getDBkey(), false );
2781                 }
2782         }
2783
2784         /**
2785          * Purge caches on page update etc
2786          */
2787         static function onArticleEdit( $title ) {
2788                 global $wgDeferredUpdateList, $wgUseFileCache;
2789
2790                 // Invalidate caches of articles which include this page
2791                 $update = new HTMLCacheUpdate( $title, 'templatelinks' );
2792                 $wgDeferredUpdateList[] = $update;
2793
2794                 # Purge squid for this page only
2795                 $title->purgeSquid();
2796
2797                 # Clear file cache
2798                 if ( $wgUseFileCache ) {
2799                         $cm = new HTMLFileCache( $title );
2800                         @unlink( $cm->fileCacheName() );
2801                 }
2802         }
2803
2804         /**#@-*/
2805
2806         /**
2807          * Info about this page
2808          * Called for ?action=info when $wgAllowPageInfo is on.
2809          *
2810          * @public
2811          */
2812         function info() {
2813                 global $wgLang, $wgOut, $wgAllowPageInfo, $wgUser;
2814
2815                 if ( !$wgAllowPageInfo ) {
2816                         $wgOut->showErrorPage( 'nosuchaction', 'nosuchactiontext' );
2817                         return;
2818                 }
2819
2820                 $page = $this->mTitle->getSubjectPage();
2821
2822                 $wgOut->setPagetitle( $page->getPrefixedText() );
2823                 $wgOut->setPageTitleActionText( wfMsg( 'info_short' ) );
2824                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ) );
2825
2826                 if( !$this->mTitle->exists() ) {
2827                         $wgOut->addHtml( '<div class="noarticletext">' );
2828                         if( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
2829                                 // This doesn't quite make sense; the user is asking for
2830                                 // information about the _page_, not the message... -- RC
2831                                 $wgOut->addHtml( htmlspecialchars( wfMsgWeirdKey( $this->mTitle->getText() ) ) );
2832                         } else {
2833                                 $msg = $wgUser->isLoggedIn()
2834                                         ? 'noarticletext'
2835                                         : 'noarticletextanon';
2836                                 $wgOut->addHtml( wfMsgExt( $msg, 'parse' ) );
2837                         }
2838                         $wgOut->addHtml( '</div>' );
2839                 } else {
2840                         $dbr = wfGetDB( DB_SLAVE );
2841                         $wl_clause = array(
2842                                 'wl_title'     => $page->getDBkey(),
2843                                 'wl_namespace' => $page->getNamespace() );
2844                         $numwatchers = $dbr->selectField(
2845                                 'watchlist',
2846                                 'COUNT(*)',
2847                                 $wl_clause,
2848                                 __METHOD__,
2849                                 $this->getSelectOptions() );
2850
2851                         $pageInfo = $this->pageCountInfo( $page );
2852                         $talkInfo = $this->pageCountInfo( $page->getTalkPage() );
2853
2854                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $wgLang->formatNum( $numwatchers ) ) . '</li>' );
2855                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $wgLang->formatNum( $pageInfo['edits'] ) ) . '</li>');
2856                         if( $talkInfo ) {
2857                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $wgLang->formatNum( $talkInfo['edits'] ) ) . '</li>');
2858                         }
2859                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $wgLang->formatNum( $pageInfo['authors'] ) ) . '</li>' );
2860                         if( $talkInfo ) {
2861                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $wgLang->formatNum( $talkInfo['authors'] ) ) . '</li>' );
2862                         }
2863                         $wgOut->addHTML( '</ul>' );
2864
2865                 }
2866         }
2867
2868         /**
2869          * Return the total number of edits and number of unique editors
2870          * on a given page. If page does not exist, returns false.
2871          *
2872          * @param Title $title
2873          * @return array
2874          * @private
2875          */
2876         function pageCountInfo( $title ) {
2877                 $id = $title->getArticleId();
2878                 if( $id == 0 ) {
2879                         return false;
2880                 }
2881
2882                 $dbr = wfGetDB( DB_SLAVE );
2883
2884                 $rev_clause = array( 'rev_page' => $id );
2885
2886                 $edits = $dbr->selectField(
2887                         'revision',
2888                         'COUNT(rev_page)',
2889                         $rev_clause,
2890                         __METHOD__,
2891                         $this->getSelectOptions() );
2892
2893                 $authors = $dbr->selectField(
2894                         'revision',
2895                         'COUNT(DISTINCT rev_user_text)',
2896                         $rev_clause,
2897                         __METHOD__,
2898                         $this->getSelectOptions() );
2899
2900                 return array( 'edits' => $edits, 'authors' => $authors );
2901         }
2902
2903         /**
2904          * Return a list of templates used by this article.
2905          * Uses the templatelinks table
2906          *
2907          * @return array Array of Title objects
2908          */
2909         function getUsedTemplates() {
2910                 $result = array();
2911                 $id = $this->mTitle->getArticleID();
2912                 if( $id == 0 ) {
2913                         return array();
2914                 }
2915
2916                 $dbr = wfGetDB( DB_SLAVE );
2917                 $res = $dbr->select( array( 'templatelinks' ),
2918                         array( 'tl_namespace', 'tl_title' ),
2919                         array( 'tl_from' => $id ),
2920                         'Article:getUsedTemplates' );
2921                 if ( false !== $res ) {
2922                         if ( $dbr->numRows( $res ) ) {
2923                                 while ( $row = $dbr->fetchObject( $res ) ) {
2924                                         $result[] = Title::makeTitle( $row->tl_namespace, $row->tl_title );
2925                                 }
2926                         }
2927                 }
2928                 $dbr->freeResult( $res );
2929                 return $result;
2930         }
2931
2932         /**
2933          * Return an auto-generated summary if the text provided is a redirect.
2934          *
2935          * @param  string $text The wikitext to check
2936          * @return string '' or an appropriate summary
2937          */
2938         public static function getRedirectAutosummary( $text ) {
2939                 $rt = Title::newFromRedirect( $text );
2940                 if( is_object( $rt ) )
2941                         return wfMsgForContent( 'autoredircomment', $rt->getFullText() );
2942                 else
2943                         return '';
2944         }
2945
2946         /**
2947          * Return an auto-generated summary if the new text is much shorter than
2948          * the old text.
2949          *
2950          * @param  string $oldtext The previous text of the page
2951          * @param  string $text    The submitted text of the page
2952          * @return string An appropriate autosummary, or an empty string.
2953          */
2954         public static function getBlankingAutosummary( $oldtext, $text ) {
2955                 if ($oldtext!='' && $text=='') {
2956                         return wfMsgForContent('autosumm-blank');
2957                 } elseif (strlen($oldtext) > 10 * strlen($text) && strlen($text) < 500) {
2958                         #Removing more than 90% of the article
2959                         global $wgContLang;
2960                         $truncatedtext = $wgContLang->truncate($text, max(0, 200 - strlen(wfMsgForContent('autosumm-replace'))), '...');
2961                         return wfMsgForContent('autosumm-replace', $truncatedtext);
2962                 } else {
2963                         return '';
2964                 }
2965         }
2966
2967         /**
2968         * Return an applicable autosummary if one exists for the given edit.
2969         * @param string $oldtext The previous text of the page.
2970         * @param string $newtext The submitted text of the page.
2971         * @param bitmask $flags A bitmask of flags submitted for the edit.
2972         * @return string An appropriate autosummary, or an empty string.
2973         */
2974         public static function getAutosummary( $oldtext, $newtext, $flags ) {
2975
2976                 # This code is UGLY UGLY UGLY.
2977                 # Somebody PLEASE come up with a more elegant way to do it.
2978
2979                 #Redirect autosummaries
2980                 $summary = self::getRedirectAutosummary( $newtext );
2981
2982                 if ($summary)
2983                         return $summary;
2984
2985                 #Blanking autosummaries
2986                 if (!($flags & EDIT_NEW))
2987                         $summary = self::getBlankingAutosummary( $oldtext, $newtext );
2988
2989                 if ($summary)
2990                         return $summary;
2991
2992                 #New page autosummaries
2993                 if ($flags & EDIT_NEW && strlen($newtext)) {
2994                         #If they're making a new article, give its text, truncated, in the summary.
2995                         global $wgContLang;
2996                         $truncatedtext = $wgContLang->truncate(
2997                                 str_replace("\n", ' ', $newtext),
2998                                 max( 0, 200 - strlen( wfMsgForContent( 'autosumm-new') ) ),
2999                                 '...' );
3000                         $summary = wfMsgForContent( 'autosumm-new', $truncatedtext );
3001                 }
3002
3003                 if ($summary)
3004                         return $summary;
3005
3006                 return $summary;
3007         }
3008
3009         /**
3010          * Add the primary page-view wikitext to the output buffer
3011          * Saves the text into the parser cache if possible.
3012          * Updates templatelinks if it is out of date.
3013          *
3014          * @param string  $text
3015          * @param bool    $cache
3016          */
3017         public function outputWikiText( $text, $cache = true ) {
3018                 global $wgParser, $wgUser, $wgOut;
3019
3020                 $popts = $wgOut->parserOptions();
3021                 $popts->setTidy(true);
3022                 $parserOutput = $wgParser->parse( $text, $this->mTitle,
3023                         $popts, true, true, $this->getRevIdFetched() );
3024                 $popts->setTidy(false);
3025                 if ( $cache && $this && $parserOutput->getCacheTime() != -1 ) {
3026                         $parserCache =& ParserCache::singleton();
3027                         $parserCache->save( $parserOutput, $this, $wgUser );
3028                 }
3029
3030                 if ( !wfReadOnly() && $this->mTitle->areRestrictionsCascading() ) {
3031                         // templatelinks table may have become out of sync,
3032                         // especially if using variable-based transclusions.
3033                         // For paranoia, check if things have changed and if
3034                         // so apply updates to the database. This will ensure
3035                         // that cascaded protections apply as soon as the changes
3036                         // are visible.
3037
3038                         # Get templates from templatelinks
3039                         $id = $this->mTitle->getArticleID();
3040
3041                         $tlTemplates = array();
3042
3043                         $dbr = wfGetDB( DB_SLAVE );
3044                         $res = $dbr->select( array( 'templatelinks' ),
3045                                 array( 'tl_namespace', 'tl_title' ),
3046                                 array( 'tl_from' => $id ),
3047                                 'Article:getUsedTemplates' );
3048
3049                         global $wgContLang;
3050
3051                         if ( false !== $res ) {
3052                                 if ( $dbr->numRows( $res ) ) {
3053                                         while ( $row = $dbr->fetchObject( $res ) ) {
3054                                                 $tlTemplates[] = $wgContLang->getNsText( $row->tl_namespace ) . ':' . $row->tl_title ;
3055                                         }
3056                                 }
3057                         }
3058
3059                         # Get templates from parser output.
3060                         $poTemplates_allns = $parserOutput->getTemplates();
3061
3062                         $poTemplates = array ();
3063                         foreach ( $poTemplates_allns as $ns_templates ) {
3064                                 $poTemplates = array_merge( $poTemplates, $ns_templates );
3065                         }
3066
3067                         # Get the diff
3068                         $templates_diff = array_diff( $poTemplates, $tlTemplates );
3069
3070                         if ( count( $templates_diff ) > 0 ) {
3071                                 # Whee, link updates time.
3072                                 $u = new LinksUpdate( $this->mTitle, $parserOutput );
3073
3074                                 $dbw = wfGetDb( DB_MASTER );
3075                                 $dbw->begin();
3076
3077                                 $u->doUpdate();
3078
3079                                 $dbw->commit();
3080                         }
3081                 }
3082
3083                 $wgOut->addParserOutput( $parserOutput );
3084         }
3085
3086 }