includes/Article.php

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