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 require_once( 'Revision.php' );
  12
  13 $wgArticleCurContentFields = false;
  14 $wgArticleOldContentFields = false;
  15
  16 /**
  17  * Class representing a MediaWiki article and history.
  18  *
  19  * See design.txt for an overview.
  20  * Note: edit user interface and cache support functions have been
  21  * moved to separate EditPage and CacheManager classes.
  22  *
  23  * @package MediaWiki
  24  */
  25 class Article {
  26         /**#@+
  27          * @access private
  28          */
  29         var $mContent, $mContentLoaded;
  30         var $mUser, $mTimestamp, $mUserText;
  31         var $mCounter, $mComment, $mGoodAdjustment, $mTotalAdjustment;
  32         var $mMinorEdit, $mRedirectedFrom;
  33         var $mTouched, $mFileCache, $mTitle;
  34         var $mId, $mTable;
  35         var $mForUpdate;
  36         var $mOldId;
  37         var $mRevIdFetched;
  38         var $mRevision;
  39         var $mRedirectUrl;
  40         /**#@-*/
  41
  42         /**
  43          * Constructor and clear the article
  44          * @param Title &$title
  45          * @param integer $oldId Revision ID, null to fetch from request, zero for current
  46          */
  47         function Article( &$title, $oldId = null ) {
  48                 $this->mTitle =& $title;
  49                 $this->mOldId = $oldId;
  50                 $this->clear();
  51         }
  52
  53         /**
  54          * Tell the page view functions that this view was redirected
  55          * from another page on the wiki.
  56          * @param Title $from
  57          */
  58         function setRedirectedFrom( $from ) {
  59                 $this->mRedirectedFrom = $from;
  60         }
  61
  62         /**
  63          * @return mixed false, Title of in-wiki target, or string with URL
  64          */
  65         function followRedirect() {
  66                 $text = $this->getContent();
  67                 $rt = Title::newFromRedirect( $text );
  68
  69                 # process if title object is valid and not special:userlogout
  70                 if( $rt ) {
  71                         if( $rt->getInterwiki() != '' ) {
  72                                 if( $rt->isLocal() ) {
  73                                         // Offsite wikis need an HTTP redirect.
  74                                         //
  75                                         // This can be hard to reverse and may produce loops,
  76                                         // so they may be disabled in the site configuration.
  77
  78                                         $source = $this->mTitle->getFullURL( 'redirect=no' );
  79                                         return $rt->getFullURL( 'rdfrom=' . urlencode( $source ) );
  80                                 }
  81                         } else {
  82                                 if( $rt->getNamespace() == NS_SPECIAL ) {
  83                                         // Gotta hand redirects to special pages differently:
  84                                         // Fill the HTTP response "Location" header and ignore
  85                                         // the rest of the page we're on.
  86                                         //
  87                                         // This can be hard to reverse, so they may be disabled.
  88
  89                                         if( $rt->getNamespace() == NS_SPECIAL && $rt->getText() == 'Userlogout' ) {
  90                                                 // rolleyes
  91                                         } else {
  92                                                 return $rt->getFullURL();
  93                                         }
  94                                 }
  95                                 return $rt;
  96                         }
  97                 }
  98
  99                 // No or invalid redirect
 100                 return false;
 101         }
 102
 103         /**
 104          * get the title object of the article
 105          */
 106         function getTitle() {
 107                 return $this->mTitle;
 108         }
 109
 110         /**
 111           * Clear the object
 112           * @access private
 113           */
 114         function clear() {
 115                 $this->mDataLoaded    = false;
 116                 $this->mContentLoaded = false;
 117
 118                 $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
 119                 $this->mRedirectedFrom = null; # Title object if set
 120                 $this->mUserText =
 121                 $this->mTimestamp = $this->mComment = $this->mFileCache = '';
 122                 $this->mGoodAdjustment = $this->mTotalAdjustment = 0;
 123                 $this->mTouched = '19700101000000';
 124                 $this->mForUpdate = false;
 125                 $this->mIsRedirect = false;
 126                 $this->mRevIdFetched = 0;
 127                 $this->mRedirectUrl = false;
 128         }
 129
 130         /**
 131          * Note that getContent/loadContent do not follow redirects anymore.
 132          * If you need to fetch redirectable content easily, try
 133          * the shortcut in Article::followContent()
 134          *
 135          * @fixme There are still side-effects in this!
 136          *        In general, you should use the Revision class, not Article,
 137          *        to fetch text for purposes other than page views.
 138          *
 139          * @return Return the text of this revision
 140         */
 141         function getContent() {
 142                 global $wgRequest, $wgUser, $wgOut;
 143
 144                 # Get variables from query string :P
 145                 $action = $wgRequest->getText( 'action', 'view' );
 146                 $section = $wgRequest->getText( 'section' );
 147                 $preload = $wgRequest->getText( 'preload' );
 148
 149                 $fname =  'Article::getContent';
 150                 wfProfileIn( $fname );
 151
 152                 if ( 0 == $this->getID() ) {
 153                         if ( 'edit' == $action ) {
 154                                 wfProfileOut( $fname );
 155
 156                                 # If requested, preload some text.
 157                                 $text=$this->getPreloadedText($preload);
 158
 159                                 # We used to put MediaWiki:Newarticletext here if
 160                                 # $text was empty at this point.
 161                                 # This is now shown above the edit box instead.
 162                                 return $text;
 163                         }
 164                         wfProfileOut( $fname );
 165                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
 166
 167                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 168                                 $ret = wfMsgWeirdKey ( $this->mTitle->getText() ) ;
 169                         } else {
 170                                 $ret = wfMsg( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon' );
 171                         }
 172
 173                         return "<div class='noarticletext'>$ret</div>";
 174                 } else {
 175                         $this->loadContent();
 176                         # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 177                         if ( $this->mTitle->getNamespace() == NS_USER_TALK &&
 178                           $wgUser->isIP($this->mTitle->getText()) &&
 179                           $action=='view'
 180                         ) {
 181                                 wfProfileOut( $fname );
 182                                 return $this->mContent . "\n" .wfMsg('anontalkpagetext');
 183                         } else {
 184                                 if($action=='edit') {
 185                                         if($section!='') {
 186                                                 if($section=='new') {
 187                                                         wfProfileOut( $fname );
 188                                                         $text=$this->getPreloadedText($preload);
 189                                                         return $text;
 190                                                 }
 191
 192                                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 193                                                 # comments to be stripped as well)
 194                                                 $rv=$this->getSection($this->mContent,$section);
 195                                                 wfProfileOut( $fname );
 196                                                 return $rv;
 197                                         }
 198                                 }
 199                                 wfProfileOut( $fname );
 200                                 return $this->mContent;
 201                         }
 202                 }
 203         }
 204
 205         /**
 206          * Get the contents of a page from its title and remove includeonly tags
 207          *
 208          * TODO FIXME: This is only here because of the inputbox extension and
 209          * should be moved there
 210          *
 211          * @deprecated
 212          *
 213          * @param string The title of the page
 214          * @return string The contents of the page
 215          */
 216         function getPreloadedText($preload) {
 217                 if ( $preload === '' )
 218                         return '';
 219                 else {
 220                         $preloadTitle = Title::newFromText( $preload );
 221                         if ( isset( $preloadTitle ) && $preloadTitle->userCanRead() ) {
 222                                 $rev=Revision::newFromTitle($preloadTitle);
 223                                 if ( is_object( $rev ) ) {
 224                                         $text = $rev->getText();
 225                                         // TODO FIXME: AAAAAAAAAAA, this shouldn't be implementing
 226                                         // its own mini-parser! -ævar
 227                                         $text = preg_replace( '~</?includeonly>~', '', $text );
 228                                         return $text;
 229                                 } else
 230                                         return '';
 231                         }
 232                 }
 233         }
 234
 235         /**
 236          * This function returns the text of a section, specified by a number ($section).
 237          * A section is text under a heading like == Heading == or <h1>Heading</h1>, or
 238          * the first section before any such heading (section 0).
 239          *
 240          * If a section contains subsections, these are also returned.
 241          *
 242          * @param string $text text to look in
 243          * @param integer $section section number
 244          * @return string text of the requested section
 245          */
 246         function getSection($text,$section) {
 247
 248                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 249                 # comments to be stripped as well)
 250                 $striparray=array();
 251                 $parser=new Parser();
 252                 $parser->mOutputType=OT_WIKI;
 253                 $parser->mOptions = new ParserOptions();
 254                 $striptext=$parser->strip($text, $striparray, true);
 255
 256                 # now that we can be sure that no pseudo-sections are in the source,
 257                 # split it up by section
 258                 $secs =
 259                   preg_split(
 260                   '/(^=+.+?=+|^<h[1-6].*?>.*?<\/h[1-6].*?>)(?!\S)/mi',
 261                   $striptext, -1,
 262                   PREG_SPLIT_DELIM_CAPTURE);
 263                 if($section==0) {
 264                         $rv=$secs[0];
 265                 } else {
 266                         $headline=$secs[$section*2-1];
 267                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?>.*?<\/h[1-6].*?>(?!\S)/mi',$headline,$matches);
 268                         $hlevel=$matches[1];
 269
 270                         # translate wiki heading into level
 271                         if(strpos($hlevel,'=')!==false) {
 272                                 $hlevel=strlen($hlevel);
 273                         }
 274
 275                         $rv=$headline. $secs[$section*2];
 276                         $count=$section+1;
 277
 278                         $break=false;
 279                         while(!empty($secs[$count*2-1]) && !$break) {
 280
 281                                 $subheadline=$secs[$count*2-1];
 282                                 preg_match( '/^(=+).+?=+|^<h([1-6]).*?>.*?<\/h[1-6].*?>(?!\S)/mi',$subheadline,$matches);
 283                                 $subhlevel=$matches[1];
 284                                 if(strpos($subhlevel,'=')!==false) {
 285                                         $subhlevel=strlen($subhlevel);
 286                                 }
 287                                 if($subhlevel > $hlevel) {
 288                                         $rv.=$subheadline.$secs[$count*2];
 289                                 }
 290                                 if($subhlevel <= $hlevel) {
 291                                         $break=true;
 292                                 }
 293                                 $count++;
 294
 295                         }
 296                 }
 297                 # reinsert stripped tags
 298                 $rv=$parser->unstrip($rv,$striparray);
 299                 $rv=$parser->unstripNoWiki($rv,$striparray);
 300                 $rv=trim($rv);
 301                 return $rv;
 302
 303         }
 304
 305         /**
 306          * @return int The oldid of the article that is to be shown, 0 for the
 307          *             current revision
 308          */
 309         function getOldID() {
 310                 if ( is_null( $this->mOldId ) ) {
 311                         $this->mOldId = $this->getOldIDFromRequest();
 312                 }
 313                 return $this->mOldId;
 314         }
 315
 316         /**
 317          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 318          *
 319          * @return int The old id for the request
 320          */
 321         function getOldIDFromRequest() {
 322                 global $wgRequest;
 323                 $this->mRedirectUrl = false;
 324                 $oldid = $wgRequest->getVal( 'oldid' );
 325                 if ( isset( $oldid ) ) {
 326                         $oldid = intval( $oldid );
 327                         if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 328                                 $nextid = $this->mTitle->getNextRevisionID( $oldid );
 329                                 if ( $nextid  ) {
 330                                         $oldid = $nextid;
 331                                 } else {
 332                                         $this->mRedirectUrl = $this->mTitle->getFullURL( 'redirect=no' );
 333                                 }
 334                         } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 335                                 $previd = $this->mTitle->getPreviousRevisionID( $oldid );
 336                                 if ( $previd ) {
 337                                         $oldid = $previd;
 338                                 } else {
 339                                         # TODO
 340                                 }
 341                         }
 342                         $lastid = $oldid;
 343                 }
 344                 if ( !$oldid ) {
 345                         $oldid = 0;
 346                 }
 347                 return $oldid;
 348         }
 349
 350         /**
 351          * Load the revision (including text) into this object
 352          */
 353         function loadContent() {
 354                 global $wgOut, $wgRequest;
 355
 356                 if ( $this->mContentLoaded ) return;
 357
 358                 # Query variables :P
 359                 $oldid = $this->getOldID();
 360
 361                 $fname = 'Article::loadContent';
 362
 363                 # Pre-fill content with error message so that if something
 364                 # fails we'll have something telling us what we intended.
 365
 366                 $t = $this->mTitle->getPrefixedText();
 367
 368                 $this->mOldId = $oldid;
 369                 $this->fetchContent( $oldid );
 370         }
 371
 372
 373         /**
 374          * Fetch a page record with the given conditions
 375          * @param Database $dbr
 376          * @param array    $conditions
 377          * @access private
 378          */
 379         function pageData( &$dbr, $conditions ) {
 380                 $fields = array(
 381                                 'page_id',
 382                                 'page_namespace',
 383                                 'page_title',
 384                                 'page_restrictions',
 385                                 'page_counter',
 386                                 'page_is_redirect',
 387                                 'page_is_new',
 388                                 'page_random',
 389                                 'page_touched',
 390                                 'page_latest',
 391                                 'page_len' ) ;
 392                 wfRunHooks( 'ArticlePageDataBefore', array( &$this , &$fields ) )       ;
 393                 $row = $dbr->selectRow( 'page',
 394                         $fields,
 395                         $conditions,
 396                         'Article::pageData' );
 397                 wfRunHooks( 'ArticlePageDataAfter', array( &$this , &$row ) )   ;
 398                 return $row ;
 399         }
 400
 401         /**
 402          * @param Database $dbr
 403          * @param Title $title
 404          */
 405         function pageDataFromTitle( &$dbr, $title ) {
 406                 return $this->pageData( $dbr, array(
 407                         'page_namespace' => $title->getNamespace(),
 408                         'page_title'     => $title->getDBkey() ) );
 409         }
 410
 411         /**
 412          * @param Database $dbr
 413          * @param int $id
 414          */
 415         function pageDataFromId( &$dbr, $id ) {
 416                 return $this->pageData( $dbr, array( 'page_id' => $id ) );
 417         }
 418
 419         /**
 420          * Set the general counter, title etc data loaded from
 421          * some source.
 422          *
 423          * @param object $data
 424          * @access private
 425          */
 426         function loadPageData( $data ) {
 427                 $this->mTitle->mArticleID = $data->page_id;
 428                 $this->mTitle->loadRestrictions( $data->page_restrictions );
 429                 $this->mTitle->mRestrictionsLoaded = true;
 430
 431                 $this->mCounter     = $data->page_counter;
 432                 $this->mTouched     = wfTimestamp( TS_MW, $data->page_touched );
 433                 $this->mIsRedirect  = $data->page_is_redirect;
 434                 $this->mLatest      = $data->page_latest;
 435
 436                 $this->mDataLoaded  = true;
 437         }
 438
 439         /**
 440          * Get text of an article from database
 441          * Does *NOT* follow redirects.
 442          * @param int $oldid 0 for whatever the latest revision is
 443          * @return string
 444          */
 445         function fetchContent( $oldid = 0 ) {
 446                 if ( $this->mContentLoaded ) {
 447                         return $this->mContent;
 448                 }
 449
 450                 $dbr =& $this->getDB();
 451                 $fname = 'Article::fetchContent';
 452
 453                 # Pre-fill content with error message so that if something
 454                 # fails we'll have something telling us what we intended.
 455                 $t = $this->mTitle->getPrefixedText();
 456                 if( $oldid ) {
 457                         $t .= ',oldid='.$oldid;
 458                 }
 459                 $this->mContent = wfMsg( 'missingarticle', $t ) ;
 460
 461                 if( $oldid ) {
 462                         $revision = Revision::newFromId( $oldid );
 463                         if( is_null( $revision ) ) {
 464                                 wfDebug( "$fname failed to retrieve specified revision, id $oldid\n" );
 465                                 return false;
 466                         }
 467                         $data = $this->pageDataFromId( $dbr, $revision->getPage() );
 468                         if( !$data ) {
 469                                 wfDebug( "$fname failed to get page data linked to revision id $oldid\n" );
 470                                 return false;
 471                         }
 472                         $this->mTitle = Title::makeTitle( $data->page_namespace, $data->page_title );
 473                         $this->loadPageData( $data );
 474                 } else {
 475                         if( !$this->mDataLoaded ) {
 476                                 $data = $this->pageDataFromTitle( $dbr, $this->mTitle );
 477                                 if( !$data ) {
 478                                         wfDebug( "$fname failed to find page data for title " . $this->mTitle->getPrefixedText() . "\n" );
 479                                         return false;
 480                                 }
 481                                 $this->loadPageData( $data );
 482                         }
 483                         $revision = Revision::newFromId( $this->mLatest );
 484                         if( is_null( $revision ) ) {
 485                                 wfDebug( "$fname failed to retrieve current page, rev_id $data->page_latest\n" );
 486                                 return false;
 487                         }
 488                 }
 489
 490                 $this->mContent   = $revision->getText();
 491
 492                 $this->mUser      = $revision->getUser();
 493                 $this->mUserText  = $revision->getUserText();
 494                 $this->mComment   = $revision->getComment();
 495                 $this->mTimestamp = wfTimestamp( TS_MW, $revision->getTimestamp() );
 496
 497                 $this->mRevIdFetched = $revision->getID();
 498                 $this->mContentLoaded = true;
 499                 $this->mRevision =& $revision;
 500
 501                 wfRunHooks( 'ArticleAfterFetchContent', array( &$this, &$this->mContent ) ) ;
 502
 503                 return $this->mContent;
 504         }
 505
 506         /**
 507          * Read/write accessor to select FOR UPDATE
 508          *
 509          * @param mixed $x
 510          */
 511         function forUpdate( $x = NULL ) {
 512                 return wfSetVar( $this->mForUpdate, $x );
 513         }
 514
 515         /**
 516          * Get the database which should be used for reads
 517          *
 518          * @return Database
 519          */
 520         function &getDB() {
 521                 $ret =& wfGetDB( DB_MASTER );
 522                 return $ret;
 523         }
 524
 525         /**
 526          * Get options for all SELECT statements
 527          *
 528          * @param array $options an optional options array which'll be appended to
 529          *                       the default
 530          * @return array Options
 531          */
 532         function getSelectOptions( $options = '' ) {
 533                 if ( $this->mForUpdate ) {
 534                         if ( is_array( $options ) ) {
 535                                 $options[] = 'FOR UPDATE';
 536                         } else {
 537                                 $options = 'FOR UPDATE';
 538                         }
 539                 }
 540                 return $options;
 541         }
 542
 543         /**
 544          * @return int Page ID
 545          */
 546         function getID() {
 547                 if( $this->mTitle ) {
 548                         return $this->mTitle->getArticleID();
 549                 } else {
 550                         return 0;
 551                 }
 552         }
 553
 554         /**
 555          * @return bool Whether or not the page exists in the database
 556          */
 557         function exists() {
 558                 return $this->getId() != 0;
 559         }
 560
 561         /**
 562          * @return int The view count for the page
 563          */
 564         function getCount() {
 565                 if ( -1 == $this->mCounter ) {
 566                         $id = $this->getID();
 567                         $dbr =& wfGetDB( DB_SLAVE );
 568                         $this->mCounter = $dbr->selectField( 'page', 'page_counter', array( 'page_id' => $id ),
 569                                 'Article::getCount', $this->getSelectOptions() );
 570                 }
 571                 return $this->mCounter;
 572         }
 573
 574         /**
 575          * Determine whether a page  would be suitable for being counted as an
 576          * article in the site_stats table based on the title & its content
 577          *
 578          * @param string $text Text to analyze
 579          * @return bool
 580          */
 581         function isCountable( $text ) {
 582                 global $wgUseCommaCount;
 583
 584                 $token = $wgUseCommaCount ? ',' : '[[';
 585                 return
 586                         $this->mTitle->getNamespace() == NS_MAIN
 587                         && ! $this->isRedirect( $text )
 588                         && in_string( $token, $text );
 589         }
 590
 591         /**
 592          * Tests if the article text represents a redirect
 593          *
 594          * @param string $text
 595          * @return bool
 596          */
 597         function isRedirect( $text = false ) {
 598                 if ( $text === false ) {
 599                         $this->loadContent();
 600                         $titleObj = Title::newFromRedirect( $this->fetchContent() );
 601                 } else {
 602                         $titleObj = Title::newFromRedirect( $text );
 603                 }
 604                 return $titleObj !== NULL;
 605         }
 606
 607         /**
 608          * Returns true if the currently-referenced revision is the current edit
 609          * to this page (and it exists).
 610          * @return bool
 611          */
 612         function isCurrent() {
 613                 return $this->exists() &&
 614                         isset( $this->mRevision ) &&
 615                         $this->mRevision->isCurrent();
 616         }
 617
 618         /**
 619          * Loads everything except the text
 620          * This isn't necessary for all uses, so it's only done if needed.
 621          * @access private
 622          */
 623         function loadLastEdit() {
 624                 global $wgOut;
 625
 626                 if ( -1 != $this->mUser )
 627                         return;
 628
 629                 # New or non-existent articles have no user information
 630                 $id = $this->getID();
 631                 if ( 0 == $id ) return;
 632
 633                 $this->mLastRevision = Revision::loadFromPageId( $this->getDB(), $id );
 634                 if( !is_null( $this->mLastRevision ) ) {
 635                         $this->mUser      = $this->mLastRevision->getUser();
 636                         $this->mUserText  = $this->mLastRevision->getUserText();
 637                         $this->mTimestamp = $this->mLastRevision->getTimestamp();
 638                         $this->mComment   = $this->mLastRevision->getComment();
 639                         $this->mMinorEdit = $this->mLastRevision->isMinor();
 640                         $this->mRevIdFetched = $this->mLastRevision->getID();
 641                 }
 642         }
 643
 644         function getTimestamp() {
 645                 $this->loadLastEdit();
 646                 return wfTimestamp(TS_MW, $this->mTimestamp);
 647         }
 648
 649         function getUser() {
 650                 $this->loadLastEdit();
 651                 return $this->mUser;
 652         }
 653
 654         function getUserText() {
 655                 $this->loadLastEdit();
 656                 return $this->mUserText;
 657         }
 658
 659         function getComment() {
 660                 $this->loadLastEdit();
 661                 return $this->mComment;
 662         }
 663
 664         function getMinorEdit() {
 665                 $this->loadLastEdit();
 666                 return $this->mMinorEdit;
 667         }
 668
 669         function getRevIdFetched() {
 670                 $this->loadLastEdit();
 671                 return $this->mRevIdFetched;
 672         }
 673
 674         function getContributors($limit = 0, $offset = 0) {
 675                 $fname = 'Article::getContributors';
 676
 677                 # XXX: this is expensive; cache this info somewhere.
 678
 679                 $title = $this->mTitle;
 680                 $contribs = array();
 681                 $dbr =& wfGetDB( DB_SLAVE );
 682                 $revTable = $dbr->tableName( 'revision' );
 683                 $userTable = $dbr->tableName( 'user' );
 684                 $encDBkey = $dbr->addQuotes( $title->getDBkey() );
 685                 $ns = $title->getNamespace();
 686                 $user = $this->getUser();
 687                 $pageId = $this->getId();
 688
 689                 $sql = "SELECT rev_user, rev_user_text, user_real_name, MAX(rev_timestamp) as timestamp
 690                         FROM $revTable LEFT JOIN $userTable ON rev_user = user_id
 691                         WHERE rev_page = $pageId
 692                         AND rev_user != $user
 693                         GROUP BY rev_user, rev_user_text, user_real_name
 694                         ORDER BY timestamp DESC";
 695
 696                 if ($limit > 0) { $sql .= ' LIMIT '.$limit; }
 697                 $sql .= ' '. $this->getSelectOptions();
 698
 699                 $res = $dbr->query($sql, $fname);
 700
 701                 while ( $line = $dbr->fetchObject( $res ) ) {
 702                         $contribs[] = array($line->rev_user, $line->rev_user_text, $line->user_real_name);
 703                 }
 704
 705                 $dbr->freeResult($res);
 706                 return $contribs;
 707         }
 708
 709         /**
 710          * This is the default action of the script: just view the page of
 711          * the given title.
 712         */
 713         function view() {
 714                 global $wgUser, $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgContLang;
 715                 global $wgEnableParserCache, $wgStylePath, $wgUseRCPatrol, $wgParser;
 716                 global $wgUseTrackbacks;
 717                 $sk = $wgUser->getSkin();
 718
 719                 $fname = 'Article::view';
 720                 wfProfileIn( $fname );
 721                 $parserCache =& ParserCache::singleton();
 722                 # Get variables from query string
 723                 $oldid = $this->getOldID();
 724
 725                 # getOldID may want us to redirect somewhere else
 726                 if ( $this->mRedirectUrl ) {
 727                         $wgOut->redirect( $this->mRedirectUrl );
 728                         wfProfileOut( $fname );
 729                         return;
 730                 }
 731
 732                 $diff = $wgRequest->getVal( 'diff' );
 733                 $rcid = $wgRequest->getVal( 'rcid' );
 734                 $rdfrom = $wgRequest->getVal( 'rdfrom' );
 735
 736                 $wgOut->setArticleFlag( true );
 737                 $wgOut->setRobotpolicy( 'index,follow' );
 738                 # If we got diff and oldid in the query, we want to see a
 739                 # diff page instead of the article.
 740
 741                 if ( !is_null( $diff ) ) {
 742                         require_once( 'DifferenceEngine.php' );
 743                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 744
 745                         $de = new DifferenceEngine( $this->mTitle, $oldid, $diff, $rcid );
 746                         // DifferenceEngine directly fetched the revision:
 747                         $this->mRevIdFetched = $de->mNewid;
 748                         $de->showDiffPage();
 749
 750                         if( $diff == 0 ) {
 751                                 # Run view updates for current revision only
 752                                 $this->viewUpdates();
 753                         }
 754                         wfProfileOut( $fname );
 755                         return;
 756                 }
 757
 758                 if ( empty( $oldid ) && $this->checkTouched() ) {
 759                         $wgOut->setETag($parserCache->getETag($this, $wgUser));
 760
 761                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 762                                 wfProfileOut( $fname );
 763                                 return;
 764                         } else if ( $this->tryFileCache() ) {
 765                                 # tell wgOut that output is taken care of
 766                                 $wgOut->disable();
 767                                 $this->viewUpdates();
 768                                 wfProfileOut( $fname );
 769                                 return;
 770                         }
 771                 }
 772                 # Should the parser cache be used?
 773                 $pcache = $wgEnableParserCache &&
 774                         intval( $wgUser->getOption( 'stubthreshold' ) ) == 0 &&
 775                         $this->exists() &&
 776                         empty( $oldid );
 777                 wfDebug( 'Article::view using parser cache: ' . ($pcache ? 'yes' : 'no' ) . "\n" );
 778                 if ( $wgUser->getOption( 'stubthreshold' ) ) {
 779                         wfIncrStats( 'pcache_miss_stub' );
 780                 }
 781
 782                 $wasRedirected = false;
 783                 if ( isset( $this->mRedirectedFrom ) ) {
 784                         // This is an internally redirected page view.
 785                         // We'll need a backlink to the source page for navigation.
 786                         if ( wfRunHooks( 'ArticleViewRedirect', array( &$this ) ) ) {
 787                                 $sk = $wgUser->getSkin();
 788                                 $redir = $sk->makeKnownLinkObj( $this->mRedirectedFrom, '', 'redirect=no' );
 789                                 $s = wfMsg( 'redirectedfrom', $redir );
 790                                 $wgOut->setSubtitle( $s );
 791                                 $wasRedirected = true;
 792                         }
 793                 } elseif ( !empty( $rdfrom ) ) {
 794                         // This is an externally redirected view, from some other wiki.
 795                         // If it was reported from a trusted site, supply a backlink.
 796                         global $wgRedirectSources;
 797                         if( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 798                                 $sk = $wgUser->getSkin();
 799                                 $redir = $sk->makeExternalLink( $rdfrom, $rdfrom );
 800                                 $s = wfMsg( 'redirectedfrom', $redir );
 801                                 $wgOut->setSubtitle( $s );
 802                                 $wasRedirected = true;
 803                         }
 804                 }
 805
 806                 $outputDone = false;
 807                 if ( $pcache ) {
 808                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 809                                 $outputDone = true;
 810                         }
 811                 }
 812                 if ( !$outputDone ) {
 813                         $text = $this->getContent();
 814                         if ( $text === false ) {
 815                                 # Failed to load, replace text with error message
 816                                 $t = $this->mTitle->getPrefixedText();
 817                                 if( $oldid ) {
 818                                         $t .= ',oldid='.$oldid;
 819                                 }
 820                                 $text = wfMsg( 'missingarticle', $t );
 821                         }
 822
 823                         # Another whitelist check in case oldid is altering the title
 824                         if ( !$this->mTitle->userCanRead() ) {
 825                                 $wgOut->loginToUse();
 826                                 $wgOut->output();
 827                                 exit;
 828                         }
 829
 830                         # We're looking at an old revision
 831
 832                         if ( !empty( $oldid ) ) {
 833                                 $this->setOldSubtitle( isset($this->mOldId) ? $this->mOldId : $oldid );
 834                                 $wgOut->setRobotpolicy( 'noindex,follow' );
 835                         }
 836                 }
 837                 if( !$outputDone ) {
 838                         /**
 839                          * @fixme: this hook doesn't work most of the time, as it doesn't
 840                          * trigger when the parser cache is used.
 841                          */
 842                         wfRunHooks( 'ArticleViewHeader', array( &$this ) ) ;
 843                         $wgOut->setRevisionId( $this->getRevIdFetched() );
 844                         # wrap user css and user js in pre and don't parse
 845                         # XXX: use $this->mTitle->usCssJsSubpage() when php is fixed/ a workaround is found
 846                         if (
 847                                 $this->mTitle->getNamespace() == NS_USER &&
 848                                 preg_match('/\\/[\\w]+\\.(css|js)$/', $this->mTitle->getDBkey())
 849                         ) {
 850                                 $wgOut->addWikiText( wfMsg('clearyourcache'));
 851                                 $wgOut->addHTML( '<pre>'.htmlspecialchars($this->mContent)."\n</pre>" );
 852                         } else if ( $rt = Title::newFromRedirect( $text ) ) {
 853                                 # Display redirect
 854                                 $imageDir = $wgContLang->isRTL() ? 'rtl' : 'ltr';
 855                                 $imageUrl = $wgStylePath.'/common/images/redirect' . $imageDir . '.png';
 856                                 if( !$wasRedirected ) {
 857                                         $wgOut->setSubtitle( wfMsgHtml( 'redirectpagesub' ) );
 858                                 }
 859                                 $targetUrl = $rt->escapeLocalURL();
 860                                 $titleText = htmlspecialchars( $rt->getPrefixedText() );
 861                                 $link = $sk->makeLinkObj( $rt );
 862
 863                                 $wgOut->addHTML( '<img src="'.$imageUrl.'" alt="#REDIRECT" />' .
 864                                   '<span class="redirectText">'.$link.'</span>' );
 865
 866                                 $parseout = $wgParser->parse($text, $this->mTitle, ParserOptions::newFromUser($wgUser));
 867                                 $wgOut->addParserOutputNoText( $parseout );
 868                         } else if ( $pcache ) {
 869                                 # Display content and save to parser cache
 870                                 $wgOut->addPrimaryWikiText( $text, $this );
 871                         } else {
 872                                 # Display content, don't attempt to save to parser cache
 873
 874                                 # Don't show section-edit links on old revisions... this way lies madness.
 875                                 if( !$this->isCurrent() ) {
 876                                         $oldEditSectionSetting = $wgOut->mParserOptions->setEditSection( false );
 877                                 }
 878                                 # Display content and don't save to parser cache
 879                                 $wgOut->addPrimaryWikiText( $text, $this, false );
 880
 881                                 if( !$this->isCurrent() ) {
 882                                         $wgOut->mParserOptions->setEditSection( $oldEditSectionSetting );
 883                                 }
 884                         }
 885                 }
 886                 /* title may have been set from the cache */
 887                 $t = $wgOut->getPageTitle();
 888                 if( empty( $t ) ) {
 889                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 890                 }
 891
 892                 # If we have been passed an &rcid= parameter, we want to give the user a
 893                 # chance to mark this new article as patrolled.
 894                 if ( $wgUseRCPatrol
 895                         && !is_null($rcid)
 896                         && $rcid != 0
 897                         && $wgUser->isLoggedIn()
 898                         && ( $wgUser->isAllowed('patrol') || !$wgOnlySysopsCanPatrol ) )
 899                 {
 900                         $wgOut->addHTML(
 901                                 "<div class='patrollink'>" .
 902                                         wfMsg ( 'markaspatrolledlink',
 903                                         $sk->makeKnownLinkObj( $this->mTitle, wfMsg('markaspatrolledtext'), "action=markpatrolled&rcid=$rcid" )
 904                                         ) .
 905                                 '</div>'
 906                          );
 907                 }
 908
 909                 # Trackbacks
 910                 if ($wgUseTrackbacks)
 911                         $this->addTrackbacks();
 912
 913                 $this->viewUpdates();
 914                 wfProfileOut( $fname );
 915         }
 916
 917         function addTrackbacks() {
 918                 global $wgOut, $wgUser;
 919
 920                 $dbr =& wfGetDB(DB_SLAVE);
 921                 $tbs = $dbr->select(
 922                                 /* FROM   */ 'trackbacks',
 923                                 /* SELECT */ array('tb_id', 'tb_title', 'tb_url', 'tb_ex', 'tb_name'),
 924                                 /* WHERE  */ array('tb_page' => $this->getID())
 925                 );
 926
 927                 if (!$dbr->numrows($tbs))
 928                         return;
 929
 930                 $tbtext = "";
 931                 while ($o = $dbr->fetchObject($tbs)) {
 932                         $rmvtxt = "";
 933                         if ($wgUser->isSysop()) {
 934                                 $delurl = $this->mTitle->getFullURL("action=deletetrackback&tbid="
 935                                                 . $o->tb_id . "&token=" . $wgUser->editToken());
 936                                 $rmvtxt = wfMsg('trackbackremove', $delurl);
 937                         }
 938                         $tbtext .= wfMsg(strlen($o->tb_ex) ? 'trackbackexcerpt' : 'trackback',
 939                                         $o->tb_title,
 940                                         $o->tb_url,
 941                                         $o->tb_ex,
 942                                         $o->tb_name,
 943                                         $rmvtxt);
 944                 }
 945                 $wgOut->addWikitext(wfMsg('trackbackbox', $tbtext));
 946         }
 947
 948         function deletetrackback() {
 949                 global $wgUser, $wgRequest, $wgOut, $wgTitle;
 950
 951                 if (!$wgUser->matchEditToken($wgRequest->getVal('token'))) {
 952                         $wgOut->addWikitext(wfMsg('sessionfailure'));
 953                         return;
 954                 }
 955
 956                 if ((!$wgUser->isAllowed('delete'))) {
 957                         $wgOut->sysopRequired();
 958                         return;
 959                 }
 960
 961                 if (wfReadOnly()) {
 962                         $wgOut->readOnlyPage();
 963                         return;
 964                 }
 965
 966                 $db =& wfGetDB(DB_MASTER);
 967                 $db->delete('trackbacks', array('tb_id' => $wgRequest->getInt('tbid')));
 968                 $wgTitle->invalidateCache();
 969                 $wgOut->addWikiText(wfMsg('trackbackdeleteok'));
 970         }
 971
 972         function render() {
 973                 global $wgOut;
 974
 975                 $wgOut->setArticleBodyOnly(true);
 976                 $this->view();
 977         }
 978
 979         function purge() {
 980                 global $wgUser, $wgRequest, $wgOut, $wgUseSquid;
 981
 982                 if ( $wgUser->isLoggedIn() || $wgRequest->wasPosted() || ! wfRunHooks( 'ArticlePurge', array( &$this ) ) ) {
 983                         // Invalidate the cache
 984                         $this->mTitle->invalidateCache();
 985
 986                         if ( $wgUseSquid ) {
 987                                 // Commit the transaction before the purge is sent
 988                                 $dbw = wfGetDB( DB_MASTER );
 989                                 $dbw->immediateCommit();
 990
 991                                 // Send purge
 992                                 $update = SquidUpdate::newSimplePurge( $this->mTitle );
 993                                 $update->doUpdate();
 994                         }
 995                         $this->view();
 996                 } else {
 997                         $msg = $wgOut->parse( wfMsg( 'confirm_purge' ) );
 998                         $action = $this->mTitle->escapeLocalURL( 'action=purge' );
 999                         $button = htmlspecialchars( wfMsg( 'confirm_purge_button' ) );
1000                         $msg = str_replace( '$1',
1001                                 "<form method=\"post\" action=\"$action\">\n" .
1002                                 "<input type=\"submit\" name=\"submit\" value=\"$button\" />\n" .
1003                                 "</form>\n", $msg );
1004
1005                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
1006                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
1007                         $wgOut->addHTML( $msg );
1008                 }
1009         }
1010
1011         /**
1012          * Insert a new empty page record for this article.
1013          * This *must* be followed up by creating a revision
1014          * and running $this->updateToLatest( $rev_id );
1015          * or else the record will be left in a funky state.
1016          * Best if all done inside a transaction.
1017          *
1018          * @param Database $dbw
1019          * @param string   $restrictions
1020          * @return int     The newly created page_id key
1021          * @access private
1022          */
1023         function insertOn( &$dbw, $restrictions = '' ) {
1024                 $fname = 'Article::insertOn';
1025                 wfProfileIn( $fname );
1026
1027                 $page_id = $dbw->nextSequenceValue( 'page_page_id_seq' );
1028                 $dbw->insert( 'page', array(
1029                         'page_id'           => $page_id,
1030                         'page_namespace'    => $this->mTitle->getNamespace(),
1031                         'page_title'        => $this->mTitle->getDBkey(),
1032                         'page_counter'      => 0,
1033                         'page_restrictions' => $restrictions,
1034                         'page_is_redirect'  => 0, # Will set this shortly...
1035                         'page_is_new'       => 1,
1036                         'page_random'       => wfRandom(),
1037                         'page_touched'      => $dbw->timestamp(),
1038                         'page_latest'       => 0, # Fill this in shortly...
1039                         'page_len'          => 0, # Fill this in shortly...
1040                 ), $fname );
1041                 $newid = $dbw->insertId();
1042
1043                 $this->mTitle->resetArticleId( $newid );
1044
1045                 wfProfileOut( $fname );
1046                 return $newid;
1047         }
1048
1049         /**
1050          * Update the page record to point to a newly saved revision.
1051          *
1052          * @param Database $dbw
1053          * @param Revision $revision For ID number, and text used to set
1054                                      length and redirect status fields
1055          * @param int $lastRevision If given, will not overwrite the page field
1056          *                          when different from the currently set value.
1057          *                          Giving 0 indicates the new page flag should
1058          *                          be set on.
1059          * @return bool true on success, false on failure
1060          * @access private
1061          */
1062         function updateRevisionOn( &$dbw, $revision, $lastRevision = null ) {
1063                 $fname = 'Article::updateToRevision';
1064                 wfProfileIn( $fname );
1065
1066                 $conditions = array( 'page_id' => $this->getId() );
1067                 if( !is_null( $lastRevision ) ) {
1068                         # An extra check against threads stepping on each other
1069                         $conditions['page_latest'] = $lastRevision;
1070                 }
1071
1072                 $text = $revision->getText();
1073                 $dbw->update( 'page',
1074                         array( /* SET */
1075                                 'page_latest'      => $revision->getId(),
1076                                 'page_touched'     => $dbw->timestamp(),
1077                                 'page_is_new'      => ($lastRevision === 0) ? 1 : 0,
1078                                 'page_is_redirect' => Article::isRedirect( $text ) ? 1 : 0,
1079                                 'page_len'         => strlen( $text ),
1080                         ),
1081                         $conditions,
1082                         $fname );
1083
1084                 wfProfileOut( $fname );
1085                 return ( $dbw->affectedRows() != 0 );
1086         }
1087
1088         /**
1089          * If the given revision is newer than the currently set page_latest,
1090          * update the page record. Otherwise, do nothing.
1091          *
1092          * @param Database $dbw
1093          * @param Revision $revision
1094          */
1095         function updateIfNewerOn( &$dbw, $revision ) {
1096                 $fname = 'Article::updateIfNewerOn';
1097                 wfProfileIn( $fname );
1098
1099                 $row = $dbw->selectRow(
1100                         array( 'revision', 'page' ),
1101                         array( 'rev_id', 'rev_timestamp' ),
1102                         array(
1103                                 'page_id' => $this->getId(),
1104                                 'page_latest=rev_id' ),
1105                         $fname );
1106                 if( $row ) {
1107                         if( wfTimestamp(TS_MW, $row->rev_timestamp) >= $revision->getTimestamp() ) {
1108                                 wfProfileOut( $fname );
1109                                 return false;
1110                         }
1111                         $prev = $row->rev_id;
1112                 } else {
1113                         # No or missing previous revision; mark the page as new
1114                         $prev = 0;
1115                 }
1116
1117                 $ret = $this->updateRevisionOn( $dbw, $revision, $prev );
1118                 wfProfileOut( $fname );
1119                 return $ret;
1120         }
1121
1122         /**
1123          * Theoretically we could defer these whole insert and update
1124          * functions for after display, but that's taking a big leap
1125          * of faith, and we want to be able to report database
1126          * errors at some point.
1127          * @access private
1128          */
1129         function insertNewArticle( $text, $summary, $isminor, $watchthis, $suppressRC=false, $comment=false ) {
1130                 global $wgOut, $wgUser, $wgUseSquid;
1131
1132                 $fname = 'Article::insertNewArticle';
1133                 wfProfileIn( $fname );
1134
1135                 if( !wfRunHooks( 'ArticleSave', array( &$this, &$wgUser, &$text,
1136                         &$summary, &$isminor, &$watchthis, NULL ) ) ) {
1137                         wfDebug( "$fname: ArticleSave hook aborted save!\n" );
1138                         wfProfileOut( $fname );
1139                         return false;
1140                 }
1141
1142                 $this->mGoodAdjustment = (int)$this->isCountable( $text );
1143                 $this->mTotalAdjustment = 1;
1144
1145                 $ns = $this->mTitle->getNamespace();
1146                 $ttl = $this->mTitle->getDBkey();
1147
1148                 # If this is a comment, add the summary as headline
1149                 if($comment && $summary!="") {
1150                         $text="== {$summary} ==\n\n".$text;
1151                 }
1152                 $text = $this->preSaveTransform( $text );
1153
1154                 /* Silently ignore minoredit if not allowed */
1155                 $isminor = $isminor && $wgUser->isAllowed('minoredit');
1156                 $now = wfTimestampNow();
1157
1158                 $dbw =& wfGetDB( DB_MASTER );
1159
1160                 # Add the page record; stake our claim on this title!
1161                 $newid = $this->insertOn( $dbw );
1162
1163                 # Save the revision text...
1164                 $revision = new Revision( array(
1165                         'page'       => $newid,
1166                         'comment'    => $summary,
1167                         'minor_edit' => $isminor,
1168                         'text'       => $text
1169                         ) );
1170                 $revisionId = $revision->insertOn( $dbw );
1171
1172                 $this->mTitle->resetArticleID( $newid );
1173
1174                 # Update the page record with revision data
1175                 $this->updateRevisionOn( $dbw, $revision, 0 );
1176
1177                 Article::onArticleCreate( $this->mTitle );
1178                 if(!$suppressRC) {
1179                         require_once( 'RecentChange.php' );
1180                         RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary, 'default',
1181                           '', strlen( $text ), $revisionId );
1182                 }
1183
1184                 if ($watchthis) {
1185                         if(!$this->mTitle->userIsWatching()) $this->watch();
1186                 } else {
1187                         if ( $this->mTitle->userIsWatching() ) {
1188                                 $this->unwatch();
1189                         }
1190                 }
1191
1192                 # The talk page isn't in the regular link tables, so we need to update manually:
1193                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
1194                 $dbw->update( 'page',
1195                         array( 'page_touched' => $dbw->timestamp($now) ),
1196                         array( 'page_namespace' => $talkns,
1197                                'page_title' => $ttl ),
1198                         $fname );
1199
1200                 # standard deferred updates
1201                 $this->editUpdates( $text, $summary, $isminor, $now, $revisionId );
1202
1203                 $oldid = 0; # new article
1204                 $this->showArticle( $text, wfMsg( 'newarticle' ), false, $isminor, $now, $summary, $oldid );
1205
1206                 wfRunHooks( 'ArticleInsertComplete', array( &$this, &$wgUser, $text,
1207                         $summary, $isminor,
1208                         $watchthis, NULL ) );
1209                 wfRunHooks( 'ArticleSaveComplete', array( &$this, &$wgUser, $text,
1210                         $summary, $isminor,
1211                         $watchthis, NULL ) );
1212                 wfProfileOut( $fname );
1213         }
1214
1215         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = '', $edittime = NULL) {
1216                 $this->replaceSection( $section, $text, $summary, $edittime );
1217         }
1218
1219         /**
1220          * @return string Complete article text, or null if error
1221          */
1222         function replaceSection($section, $text, $summary = '', $edittime = NULL) {
1223                 $fname = 'Article::replaceSection';
1224                 wfProfileIn( $fname );
1225
1226                 if ($section != '') {
1227                         if( is_null( $edittime ) ) {
1228                                 $rev = Revision::newFromTitle( $this->mTitle );
1229                         } else {
1230                                 $dbw =& wfGetDB( DB_MASTER );
1231                                 $rev = Revision::loadFromTimestamp( $dbw, $this->mTitle, $edittime );
1232                         }
1233                         if( is_null( $rev ) ) {
1234                                 wfDebug( "Article::replaceSection asked for bogus section (page: " .
1235                                         $this->getId() . "; section: $section; edittime: $edittime)\n" );
1236                                 return null;
1237                         }
1238                         $oldtext = $rev->getText();
1239
1240                         if($section=='new') {
1241                                 if($summary) $subject="== {$summary} ==\n\n";
1242                                 $text=$oldtext."\n\n".$subject.$text;
1243                         } else {
1244
1245                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
1246                                 # comments to be stripped as well)
1247                                 $striparray=array();
1248                                 $parser=new Parser();
1249                                 $parser->mOutputType=OT_WIKI;
1250                                 $parser->mOptions = new ParserOptions();
1251                                 $oldtext=$parser->strip($oldtext, $striparray, true);
1252
1253                                 # now that we can be sure that no pseudo-sections are in the source,
1254                                 # split it up
1255                                 # Unfortunately we can't simply do a preg_replace because that might
1256                                 # replace the wrong section, so we have to use the section counter instead
1257                                 $secs=preg_split('/(^=+.+?=+|^<h[1-6].*?>.*?<\/h[1-6].*?>)(?!\S)/mi',
1258                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
1259                                 $secs[$section*2]=$text."\n\n"; // replace with edited
1260
1261                                 # section 0 is top (intro) section
1262                                 if($section!=0) {
1263
1264                                         # headline of old section - we need to go through this section
1265                                         # to determine if there are any subsections that now need to
1266                                         # be erased, as the mother section has been replaced with
1267                                         # the text of all subsections.
1268                                         $headline=$secs[$section*2-1];
1269                                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?>.*?<\/h[1-6].*?>(?!\S)/mi',$headline,$matches);
1270                                         $hlevel=$matches[1];
1271
1272                                         # determine headline level for wikimarkup headings
1273                                         if(strpos($hlevel,'=')!==false) {
1274                                                 $hlevel=strlen($hlevel);
1275                                         }
1276
1277                                         $secs[$section*2-1]=''; // erase old headline
1278                                         $count=$section+1;
1279                                         $break=false;
1280                                         while(!empty($secs[$count*2-1]) && !$break) {
1281
1282                                                 $subheadline=$secs[$count*2-1];
1283                                                 preg_match(
1284                                                  '/^(=+).+?=+|^<h([1-6]).*?>.*?<\/h[1-6].*?>(?!\S)/mi',$subheadline,$matches);
1285                                                 $subhlevel=$matches[1];
1286                                                 if(strpos($subhlevel,'=')!==false) {
1287                                                         $subhlevel=strlen($subhlevel);
1288                                                 }
1289                                                 if($subhlevel > $hlevel) {
1290                                                         // erase old subsections
1291                                                         $secs[$count*2-1]='';
1292                                                         $secs[$count*2]='';
1293                                                 }
1294                                                 if($subhlevel <= $hlevel) {
1295                                                         $break=true;
1296                                                 }
1297                                                 $count++;
1298
1299                                         }
1300
1301                                 }
1302                                 $text=join('',$secs);
1303                                 # reinsert the stuff that we stripped out earlier
1304                                 $text=$parser->unstrip($text,$striparray);
1305                                 $text=$parser->unstripNoWiki($text,$striparray);
1306                         }
1307
1308                 }
1309                 wfProfileOut( $fname );
1310                 return $text;
1311         }
1312
1313         /**
1314          * Change an existing article. Puts the previous version back into the old table, updates RC
1315          * and all necessary caches, mostly via the deferred update array.
1316          *
1317          * It is possible to call this function from a command-line script, but note that you should
1318          * first set $wgUser, and clean up $wgDeferredUpdates after each edit.
1319          */
1320         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
1321                 global $wgOut, $wgUser, $wgDBtransactions, $wgMwRedir, $wgUseSquid;
1322                 global $wgPostCommitUpdateList, $wgUseFileCache;
1323
1324                 $fname = 'Article::updateArticle';
1325                 wfProfileIn( $fname );
1326                 $good = true;
1327
1328                 if( !wfRunHooks( 'ArticleSave', array( &$this, &$wgUser, &$text,
1329                         &$summary, &$minor,
1330                         &$watchthis, &$sectionanchor ) ) ) {
1331                         wfDebug( "$fname: ArticleSave hook aborted save!\n" );
1332                         wfProfileOut( $fname );
1333                         return false;
1334                 }
1335
1336                 $isminor = $minor && $wgUser->isAllowed('minoredit');
1337                 $redir = (int)$this->isRedirect( $text );
1338
1339                 $text = $this->preSaveTransform( $text );
1340                 $dbw =& wfGetDB( DB_MASTER );
1341                 $now = wfTimestampNow();
1342
1343                 # Update article, but only if changed.
1344
1345                 # It's important that we either rollback or complete, otherwise an attacker could
1346                 # overwrite cur entries by sending precisely timed user aborts. Random bored users
1347                 # could conceivably have the same effect, especially if cur is locked for long periods.
1348                 if( !$wgDBtransactions ) {
1349                         $userAbort = ignore_user_abort( true );
1350                 }
1351
1352                 $oldtext = $this->getContent();
1353                 $oldsize = strlen( $oldtext );
1354                 $newsize = strlen( $text );
1355                 $lastRevision = 0;
1356                 $revisionId = 0;
1357
1358                 if ( 0 != strcmp( $text, $oldtext ) ) {
1359                         $this->mGoodAdjustment = (int)$this->isCountable( $text )
1360                           - (int)$this->isCountable( $oldtext );
1361                         $this->mTotalAdjustment = 0;
1362                         $now = wfTimestampNow();
1363
1364                         $lastRevision = $dbw->selectField(
1365                                 'page', 'page_latest', array( 'page_id' => $this->getId() ) );
1366
1367                         $revision = new Revision( array(
1368                                 'page'       => $this->getId(),
1369                                 'comment'    => $summary,
1370                                 'minor_edit' => $isminor,
1371                                 'text'       => $text
1372                                 ) );
1373
1374                         $dbw->immediateCommit();
1375                         $dbw->begin();
1376                         $revisionId = $revision->insertOn( $dbw );
1377
1378                         # Update page
1379                         $ok = $this->updateRevisionOn( $dbw, $revision, $lastRevision );
1380
1381                         if( !$ok ) {
1382                                 /* Belated edit conflict! Run away!! */
1383                                 $good = false;
1384                                 $dbw->rollback();
1385                         } else {
1386                                 # Update recentchanges and purge cache and whatnot
1387                                 require_once( 'RecentChange.php' );
1388                                 $bot = (int)($wgUser->isBot() || $forceBot);
1389                                 RecentChange::notifyEdit( $now, $this->mTitle, $isminor, $wgUser, $summary,
1390                                         $lastRevision, $this->getTimestamp(), $bot, '', $oldsize, $newsize,
1391                                         $revisionId );
1392                                 $dbw->commit();
1393
1394                                 // Update caches outside the main transaction
1395                                 Article::onArticleEdit( $this->mTitle );
1396                         }
1397                 } else {
1398                         // Keep the same revision ID, but do some updates on it
1399                         $revisionId = $this->getRevIdFetched();
1400                 }
1401
1402                 if( !$wgDBtransactions ) {
1403                         ignore_user_abort( $userAbort );
1404                 }
1405
1406                 if ( $good ) {
1407                         if ($watchthis) {
1408                                 if (!$this->mTitle->userIsWatching()) {
1409                                         $dbw->immediateCommit();
1410                                         $dbw->begin();
1411                                         $this->watch();
1412                                         $dbw->commit();
1413                                 }
1414                         } else {
1415                                 if ( $this->mTitle->userIsWatching() ) {
1416                                         $dbw->immediateCommit();
1417                                         $dbw->begin();
1418                                         $this->unwatch();
1419                                         $dbw->commit();
1420                                 }
1421                         }
1422                         # standard deferred updates
1423                         $this->editUpdates( $text, $summary, $minor, $now, $revisionId );
1424
1425
1426                         $urls = array();
1427                         # Invalidate caches of all articles using this article as a template
1428
1429                         # Template namespace
1430                         # Purge all articles linking here
1431                         $titles = $this->mTitle->getTemplateLinksTo();
1432                         Title::touchArray( $titles );
1433                         if ( $wgUseSquid ) {
1434                                         foreach ( $titles as $title ) {
1435                                                 $urls[] = $title->getInternalURL();
1436                                         }
1437                         }
1438
1439                         # Squid updates
1440                         if ( $wgUseSquid ) {
1441                                 $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
1442                                 $u = new SquidUpdate( $urls );
1443                                 array_push( $wgPostCommitUpdateList, $u );
1444                         }
1445
1446                         # File cache
1447                         if ( $wgUseFileCache ) {
1448                                 $cm = new CacheManager($this->mTitle);
1449                                 @unlink($cm->fileCacheName());
1450                         }
1451
1452                         $this->showArticle( $text, wfMsg( 'updated' ), $sectionanchor, $isminor, $now, $summary, $lastRevision );
1453                 }
1454                 wfRunHooks( 'ArticleSaveComplete',
1455                         array( &$this, &$wgUser, $text,
1456                         $summary, $minor,
1457                         $watchthis, $sectionanchor ) );
1458                 wfProfileOut( $fname );
1459                 return $good;
1460         }
1461
1462         /**
1463          * After we've either updated or inserted the article, update
1464          * the link tables and redirect to the new page.
1465          */
1466         function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid ) {
1467                 global $wgOut, $wgUser;
1468                 global $wgUseEnotif;
1469
1470                 $fname = 'Article::showArticle';
1471                 wfProfileIn( $fname );
1472
1473                 # Output the redirect
1474                 if( $this->isRedirect( $text ) )
1475                         $r = 'redirect=no';
1476                 else
1477                         $r = '';
1478                 $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
1479
1480                 wfProfileOut( $fname );
1481         }
1482
1483         /**
1484          * Mark this particular edit as patrolled
1485          */
1486         function markpatrolled() {
1487                 global $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgUseRCPatrol, $wgUser;
1488                 $wgOut->setRobotpolicy( 'noindex,follow' );
1489
1490                 # Check RC patrol config. option
1491                 if( !$wgUseRCPatrol ) {
1492                         $wgOut->errorPage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1493                         return;
1494                 }
1495
1496                 # Check permissions
1497                 if( $wgUser->isLoggedIn() ) {
1498                         if( !$wgUser->isAllowed( 'patrol' ) ) {
1499                                 $wgOut->permissionRequired( 'patrol' );
1500                                 return;
1501                         }
1502                 } else {
1503                         $wgOut->loginToUse();
1504                         return;
1505                 }
1506
1507                 $rcid = $wgRequest->getVal( 'rcid' );
1508                 if ( !is_null ( $rcid ) )
1509                 {
1510                         if( wfRunHooks( 'MarkPatrolled', array( &$rcid, &$wgUser, $wgOnlySysopsCanPatrol ) ) ) {
1511                                 require_once( 'RecentChange.php' );
1512                                 RecentChange::markPatrolled( $rcid );
1513                                 wfRunHooks( 'MarkPatrolledComplete', array( &$rcid, &$wgUser, $wgOnlySysopsCanPatrol ) );
1514                                 $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
1515                                 $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
1516                         }
1517                         $rcTitle = Title::makeTitle( NS_SPECIAL, 'Recentchanges' );
1518                         $wgOut->returnToMain( false, $rcTitle->getPrefixedText() );
1519                 }
1520                 else
1521                 {
1522                         $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1523                 }
1524         }
1525
1526         /**
1527          * Add this page to $wgUser's watchlist
1528          */
1529
1530         function watch() {
1531
1532                 global $wgUser, $wgOut;
1533
1534                 if ( $wgUser->isAnon() ) {
1535                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1536                         return;
1537                 }
1538                 if ( wfReadOnly() ) {
1539                         $wgOut->readOnlyPage();
1540                         return;
1541                 }
1542
1543                 if (wfRunHooks('WatchArticle', array(&$wgUser, &$this))) {
1544
1545                         $wgUser->addWatch( $this->mTitle );
1546                         $wgUser->saveSettings();
1547
1548                         wfRunHooks('WatchArticleComplete', array(&$wgUser, &$this));
1549
1550                         $wgOut->setPagetitle( wfMsg( 'addedwatch' ) );
1551                         $wgOut->setRobotpolicy( 'noindex,follow' );
1552
1553                         $link = $this->mTitle->getPrefixedText();
1554                         $text = wfMsg( 'addedwatchtext', $link );
1555                         $wgOut->addWikiText( $text );
1556                 }
1557
1558                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1559         }
1560
1561         /**
1562          * Stop watching a page
1563          */
1564
1565         function unwatch() {
1566
1567                 global $wgUser, $wgOut;
1568
1569                 if ( $wgUser->isAnon() ) {
1570                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1571                         return;
1572                 }
1573                 if ( wfReadOnly() ) {
1574                         $wgOut->readOnlyPage();
1575                         return;
1576                 }
1577
1578                 if (wfRunHooks('UnwatchArticle', array(&$wgUser, &$this))) {
1579
1580                         $wgUser->removeWatch( $this->mTitle );
1581                         $wgUser->saveSettings();
1582
1583                         wfRunHooks('UnwatchArticleComplete', array(&$wgUser, &$this));
1584
1585                         $wgOut->setPagetitle( wfMsg( 'removedwatch' ) );
1586                         $wgOut->setRobotpolicy( 'noindex,follow' );
1587
1588                         $link = $this->mTitle->getPrefixedText();
1589                         $text = wfMsg( 'removedwatchtext', $link );
1590                         $wgOut->addWikiText( $text );
1591                 }
1592
1593                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1594         }
1595
1596         /**
1597          * action=protect handler
1598          */
1599         function protect() {
1600                 require_once 'ProtectionForm.php';
1601                 $form = new ProtectionForm( $this );
1602                 $form->show();
1603         }
1604
1605         /**
1606          * action=unprotect handler (alias)
1607          */
1608         function unprotect() {
1609                 $this->protect();
1610         }
1611
1612         /**
1613          * Update the article's restriction field, and leave a log entry.
1614          *
1615          * @param array $limit set of restriction keys
1616          * @param string $reason
1617          * @return bool true on success
1618          */
1619         function updateRestrictions( $limit = array(), $reason = '' ) {
1620                 global $wgUser, $wgOut, $wgRequest;
1621
1622                 if ( !$wgUser->isAllowed( 'protect' ) ) {
1623                         return false;
1624                 }
1625
1626                 if( wfReadOnly() ) {
1627                         return false;
1628                 }
1629
1630                 $id = $this->mTitle->getArticleID();
1631                 if ( 0 == $id ) {
1632                         return false;
1633                 }
1634
1635                 $flat = Article::flattenRestrictions( $limit );
1636                 $protecting = ($flat != '');
1637
1638                 if( wfRunHooks( 'ArticleProtect', array( &$this, &$wgUser,
1639                         $limit, $reason ) ) ) {
1640
1641                         $dbw =& wfGetDB( DB_MASTER );
1642                         $dbw->update( 'page',
1643                                 array( /* SET */
1644                                         'page_touched' => $dbw->timestamp(),
1645                                         'page_restrictions' => $flat
1646                                 ), array( /* WHERE */
1647                                         'page_id' => $id
1648                                 ), 'Article::protect'
1649                         );
1650
1651                         wfRunHooks( 'ArticleProtectComplete', array( &$this, &$wgUser,
1652                                 $limit, $reason ) );
1653
1654                         $log = new LogPage( 'protect' );
1655                         if( $protecting ) {
1656                                 $log->addEntry( 'protect', $this->mTitle, trim( $reason . " [$flat]" ) );
1657                         } else {
1658                                 $log->addEntry( 'unprotect', $this->mTitle, $reason );
1659                         }
1660                 }
1661                 return true;
1662         }
1663
1664         /**
1665          * Take an array of page restrictions and flatten it to a string
1666          * suitable for insertion into the page_restrictions field.
1667          * @param array $limit
1668          * @return string
1669          * @access private
1670          */
1671         function flattenRestrictions( $limit ) {
1672                 if( !is_array( $limit ) ) {
1673                         wfDebugDieBacktrace( 'Article::flattenRestrictions given non-array restriction set' );
1674                 }
1675                 $bits = array();
1676                 foreach( $limit as $action => $restrictions ) {
1677                         if( $restrictions != '' ) {
1678                                 $bits[] = "$action=$restrictions";
1679                         }
1680                 }
1681                 return implode( ':', $bits );
1682         }
1683
1684         /*
1685          * UI entry point for page deletion
1686          */
1687         function delete() {
1688                 global $wgUser, $wgOut, $wgRequest;
1689                 $fname = 'Article::delete';
1690                 $confirm = $wgRequest->wasPosted() &&
1691                         $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
1692                 $reason = $wgRequest->getText( 'wpReason' );
1693
1694                 # This code desperately needs to be totally rewritten
1695
1696                 # Check permissions
1697                 if( $wgUser->isAllowed( 'delete' ) ) {
1698                         if( $wgUser->isBlocked() ) {
1699                                 $wgOut->blockedPage();
1700                                 return;
1701                         }
1702                 } else {
1703                         $wgOut->permissionRequired( 'delete' );
1704                         return;
1705                 }
1706
1707                 if( wfReadOnly() ) {
1708                         $wgOut->readOnlyPage();
1709                         return;
1710                 }
1711
1712                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1713
1714                 # Better double-check that it hasn't been deleted yet!
1715                 $dbw =& wfGetDB( DB_MASTER );
1716                 $conds = $this->mTitle->pageCond();
1717                 $latest = $dbw->selectField( 'page', 'page_latest', $conds, $fname );
1718                 if ( $latest === false ) {
1719                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1720                         return;
1721                 }
1722
1723                 if( $confirm ) {
1724                         $this->doDelete( $reason );
1725                         return;
1726                 }
1727
1728                 # determine whether this page has earlier revisions
1729                 # and insert a warning if it does
1730                 $maxRevisions = 20;
1731                 $authors = $this->getLastNAuthors( $maxRevisions, $latest );
1732
1733                 if( count( $authors ) > 1 && !$confirm ) {
1734                         $skin=$wgUser->getSkin();
1735                         $wgOut->addHTML('<b>'.wfMsg('historywarning'));
1736                         $wgOut->addHTML( $skin->historyLink() .'</b>');
1737                 }
1738
1739                 # If a single user is responsible for all revisions, find out who they are
1740                 if ( count( $authors ) == $maxRevisions ) {
1741                         // Query bailed out, too many revisions to find out if they're all the same
1742                         $authorOfAll = false;
1743                 } else {
1744                         $authorOfAll = reset( $authors );
1745                         foreach ( $authors as $author ) {
1746                                 if ( $authorOfAll != $author ) {
1747                                         $authorOfAll = false;
1748                                         break;
1749                                 }
1750                         }
1751                 }
1752                 # Fetch article text
1753                 $rev = Revision::newFromTitle( $this->mTitle );
1754
1755                 if( !is_null( $rev ) ) {
1756                         # if this is a mini-text, we can paste part of it into the deletion reason
1757                         $text = $rev->getText();
1758
1759                         #if this is empty, an earlier revision may contain "useful" text
1760                         $blanked = false;
1761                         if( $text == '' ) {
1762                                 $prev = $rev->getPrevious();
1763                                 if( $prev ) {
1764                                         $text = $prev->getText();
1765                                         $blanked = true;
1766                                 }
1767                         }
1768
1769                         $length = strlen( $text );
1770
1771                         # this should not happen, since it is not possible to store an empty, new
1772                         # page. Let's insert a standard text in case it does, though
1773                         if( $length == 0 && $reason === '' ) {
1774                                 $reason = wfMsgForContent( 'exblank' );
1775                         }
1776
1777                         if( $length < 500 && $reason === '' ) {
1778                                 # comment field=255, let's grep the first 150 to have some user
1779                                 # space left
1780                                 global $wgContLang;
1781                                 $text = $wgContLang->truncate( $text, 150, '...' );
1782
1783                                 # let's strip out newlines
1784                                 $text = preg_replace( "/[\n\r]/", '', $text );
1785
1786                                 if( !$blanked ) {
1787                                         if( $authorOfAll === false ) {
1788                                                 $reason = wfMsgForContent( 'excontent', $text );
1789                                         } else {
1790                                                 $reason = wfMsgForContent( 'excontentauthor', $text, $authorOfAll );
1791                                         }
1792                                 } else {
1793                                         $reason = wfMsgForContent( 'exbeforeblank', $text );
1794                                 }
1795                         }
1796                 }
1797
1798                 return $this->confirmDelete( '', $reason );
1799         }
1800
1801         /**
1802          * Get the last N authors
1803          * @param int $num Number of revisions to get
1804          * @param string $revLatest The latest rev_id, selected from the master (optional)
1805          * @return array Array of authors, duplicates not removed
1806          */
1807         function getLastNAuthors( $num, $revLatest = 0 ) {
1808                 $fname = 'Article::getLastNAuthors';
1809                 wfProfileIn( $fname );
1810
1811                 // First try the slave
1812                 // If that doesn't have the latest revision, try the master
1813                 $continue = 2;
1814                 $db =& wfGetDB( DB_SLAVE );
1815                 do {
1816                         $res = $db->select( array( 'page', 'revision' ),
1817                                 array( 'rev_id', 'rev_user_text' ),
1818                                 array(
1819                                         'page_namespace' => $this->mTitle->getNamespace(),
1820                                         'page_title' => $this->mTitle->getDBkey(),
1821                                         'rev_page = page_id'
1822                                 ), $fname, $this->getSelectOptions( array(
1823                                         'ORDER BY' => 'rev_timestamp DESC',
1824                                         'LIMIT' => $num
1825                                 ) )
1826                         );
1827                         if ( !$res ) {
1828                                 wfProfileOut( $fname );
1829                                 return array();
1830                         }
1831                         $row = $db->fetchObject( $res );
1832                         if ( $continue == 2 && $revLatest && $row->rev_id != $revLatest ) {
1833                                 $db =& wfGetDB( DB_MASTER );
1834                                 $continue--;
1835                         } else {
1836                                 $continue = 0;
1837                         }
1838                 } while ( $continue );
1839
1840                 $authors = array( $row->rev_user_text );
1841                 while ( $row = $db->fetchObject( $res ) ) {
1842                         $authors[] = $row->rev_user_text;
1843                 }
1844                 wfProfileOut( $fname );
1845                 return $authors;
1846         }
1847
1848         /**
1849          * Output deletion confirmation dialog
1850          */
1851         function confirmDelete( $par, $reason ) {
1852                 global $wgOut, $wgUser;
1853
1854                 wfDebug( "Article::confirmDelete\n" );
1855
1856                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1857                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1858                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1859                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1860
1861                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1862
1863                 $confirm = htmlspecialchars( wfMsg( 'deletepage' ) );
1864                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1865                 $token = htmlspecialchars( $wgUser->editToken() );
1866
1867                 $wgOut->addHTML( "
1868 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1869         <table border='0'>
1870                 <tr>
1871                         <td align='right'>
1872                                 <label for='wpReason'>{$delcom}:</label>
1873                         </td>
1874                         <td align='left'>
1875                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1876                         </td>
1877                 </tr>
1878                 <tr>
1879                         <td>&nbsp;</td>
1880                         <td>
1881                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1882                         </td>
1883                 </tr>
1884         </table>
1885         <input type='hidden' name='wpEditToken' value=\"{$token}\" />
1886 </form>\n" );
1887
1888                 $wgOut->returnToMain( false );
1889         }
1890
1891
1892         /**
1893          * Perform a deletion and output success or failure messages
1894          */
1895         function doDelete( $reason ) {
1896                 global $wgOut, $wgUser, $wgContLang;
1897                 $fname = 'Article::doDelete';
1898                 wfDebug( $fname."\n" );
1899
1900                 if (wfRunHooks('ArticleDelete', array(&$this, &$wgUser, &$reason))) {
1901                         if ( $this->doDeleteArticle( $reason ) ) {
1902                                 $deleted = $this->mTitle->getPrefixedText();
1903
1904                                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1905                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1906
1907                                 $loglink = '[[Special:Log/delete|' . wfMsg( 'deletionlog' ) . ']]';
1908                                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
1909
1910                                 $wgOut->addWikiText( $text );
1911                                 $wgOut->returnToMain( false );
1912                                 wfRunHooks('ArticleDeleteComplete', array(&$this, &$wgUser, $reason));
1913                         } else {
1914                                 $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1915                         }
1916                 }
1917         }
1918
1919         /**
1920          * Back-end article deletion
1921          * Deletes the article with database consistency, writes logs, purges caches
1922          * Returns success
1923          */
1924         function doDeleteArticle( $reason ) {
1925                 global $wgUser, $wgUseSquid, $wgDeferredUpdateList;
1926                 global $wgPostCommitUpdateList, $wgUseTrackbacks;
1927
1928                 $fname = 'Article::doDeleteArticle';
1929                 wfDebug( $fname."\n" );
1930
1931                 $dbw =& wfGetDB( DB_MASTER );
1932                 $ns = $this->mTitle->getNamespace();
1933                 $t = $this->mTitle->getDBkey();
1934                 $id = $this->mTitle->getArticleID();
1935
1936                 if ( $t == '' || $id == 0 ) {
1937                         return false;
1938                 }
1939
1940                 $u = new SiteStatsUpdate( 0, 1, -(int)$this->isCountable( $this->getContent() ), -1 );
1941                 array_push( $wgDeferredUpdateList, $u );
1942
1943                 $linksTo = $this->mTitle->getLinksTo();
1944
1945                 # Squid purging
1946                 if ( $wgUseSquid ) {
1947                         $urls = array(
1948                                 $this->mTitle->getInternalURL(),
1949                                 $this->mTitle->getInternalURL( 'history' )
1950                         );
1951
1952                         $u = SquidUpdate::newFromTitles( $linksTo, $urls );
1953                         array_push( $wgPostCommitUpdateList, $u );
1954
1955                 }
1956
1957                 # Client and file cache invalidation
1958                 Title::touchArray( $linksTo );
1959
1960
1961                 // For now, shunt the revision data into the archive table.
1962                 // Text is *not* removed from the text table; bulk storage
1963                 // is left intact to avoid breaking block-compression or
1964                 // immutable storage schemes.
1965                 //
1966                 // For backwards compatibility, note that some older archive
1967                 // table entries will have ar_text and ar_flags fields still.
1968                 //
1969                 // In the future, we may keep revisions and mark them with
1970                 // the rev_deleted field, which is reserved for this purpose.
1971                 $dbw->insertSelect( 'archive', array( 'page', 'revision' ),
1972                         array(
1973                                 'ar_namespace'  => 'page_namespace',
1974                                 'ar_title'      => 'page_title',
1975                                 'ar_comment'    => 'rev_comment',
1976                                 'ar_user'       => 'rev_user',
1977                                 'ar_user_text'  => 'rev_user_text',
1978                                 'ar_timestamp'  => 'rev_timestamp',
1979                                 'ar_minor_edit' => 'rev_minor_edit',
1980                                 'ar_rev_id'     => 'rev_id',
1981                                 'ar_text_id'    => 'rev_text_id',
1982                         ), array(
1983                                 'page_id' => $id,
1984                                 'page_id = rev_page'
1985                         ), $fname
1986                 );
1987
1988                 # Now that it's safely backed up, delete it
1989                 $dbw->delete( 'revision', array( 'rev_page' => $id ), $fname );
1990                 $dbw->delete( 'page', array( 'page_id' => $id ), $fname);
1991
1992                 if ($wgUseTrackbacks)
1993                         $dbw->delete( 'trackbacks', array( 'tb_page' => $id ), $fname );
1994
1995                 # Clean up recentchanges entries...
1996                 $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), $fname );
1997
1998                 # Finally, clean up the link tables
1999                 $t = $this->mTitle->getPrefixedDBkey();
2000
2001                 Article::onArticleDelete( $this->mTitle );
2002
2003                 # Delete outgoing links
2004                 $dbw->delete( 'pagelinks', array( 'pl_from' => $id ) );
2005                 $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
2006                 $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
2007
2008                 # Log the deletion
2009                 $log = new LogPage( 'delete' );
2010                 $log->addEntry( 'delete', $this->mTitle, $reason );
2011
2012                 # Clear the cached article id so the interface doesn't act like we exist
2013                 $this->mTitle->resetArticleID( 0 );
2014                 $this->mTitle->mArticleID = 0;
2015                 return true;
2016         }
2017
2018         /**
2019          * Revert a modification
2020          */
2021         function rollback() {
2022                 global $wgUser, $wgOut, $wgRequest, $wgUseRCPatrol;
2023                 $fname = 'Article::rollback';
2024
2025                 if( $wgUser->isAllowed( 'rollback' ) ) {
2026                         if( $wgUser->isBlocked() ) {
2027                                 $wgOut->blockedPage();
2028                                 return;
2029                         }
2030                 } else {
2031                         $wgOut->permissionRequired( 'rollback' );
2032                         return;
2033                 }
2034
2035                 if ( wfReadOnly() ) {
2036                         $wgOut->readOnlyPage( $this->getContent() );
2037                         return;
2038                 }
2039                 if( !$wgUser->matchEditToken( $wgRequest->getVal( 'token' ),
2040                         array( $this->mTitle->getPrefixedText(),
2041                                 $wgRequest->getVal( 'from' ) )  ) ) {
2042                         $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
2043                         $wgOut->addWikiText( wfMsg( 'sessionfailure' ) );
2044                         return;
2045                 }
2046                 $dbw =& wfGetDB( DB_MASTER );
2047
2048                 # Enhanced rollback, marks edits rc_bot=1
2049                 $bot = $wgRequest->getBool( 'bot' );
2050
2051                 # Replace all this user's current edits with the next one down
2052                 $tt = $this->mTitle->getDBKey();
2053                 $n = $this->mTitle->getNamespace();
2054
2055                 # Get the last editor, lock table exclusively
2056                 $dbw->begin();
2057                 $current = Revision::newFromTitle( $this->mTitle );
2058                 if( is_null( $current ) ) {
2059                         # Something wrong... no page?
2060                         $dbw->rollback();
2061                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
2062                         return;
2063                 }
2064
2065                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
2066                 if( $from != $current->getUserText() ) {
2067                         $wgOut->setPageTitle( wfMsg('rollbackfailed') );
2068                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
2069                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
2070                                 htmlspecialchars( $from ),
2071                                 htmlspecialchars( $current->getUserText() ) ) );
2072                         if( $current->getComment() != '') {
2073                                 $wgOut->addHTML(
2074                                         wfMsg( 'editcomment',
2075                                         htmlspecialchars( $current->getComment() ) ) );
2076                         }
2077                         return;
2078                 }
2079
2080                 # Get the last edit not by this guy
2081                 $user = intval( $current->getUser() );
2082                 $user_text = $dbw->addQuotes( $current->getUserText() );
2083                 $s = $dbw->selectRow( 'revision',
2084                         array( 'rev_id', 'rev_timestamp' ),
2085                         array(
2086                                 'rev_page' => $current->getPage(),
2087                                 "rev_user <> {$user} OR rev_user_text <> {$user_text}"
2088                         ), $fname,
2089                         array(
2090                                 'USE INDEX' => 'page_timestamp',
2091                                 'ORDER BY'  => 'rev_timestamp DESC' )
2092                         );
2093                 if( $s === false ) {
2094                         # Something wrong
2095                         $dbw->rollback();
2096                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
2097                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
2098                         return;
2099                 }
2100
2101                 $set = array();
2102                 if ( $bot ) {
2103                         # Mark all reverted edits as bot
2104                         $set['rc_bot'] = 1;
2105                 }
2106                 if ( $wgUseRCPatrol ) {
2107                         # Mark all reverted edits as patrolled
2108                         $set['rc_patrolled'] = 1;
2109                 }
2110
2111                 if ( $set ) {
2112                         $dbw->update( 'recentchanges', $set,
2113                                 array( /* WHERE */
2114                                         'rc_cur_id'    => $current->getPage(),
2115                                         'rc_user_text' => $current->getUserText(),
2116                                         "rc_timestamp > '{$s->rev_timestamp}'",
2117                                 ), $fname
2118                         );
2119                 }
2120
2121                 # Get the edit summary
2122                 $target = Revision::newFromId( $s->rev_id );
2123                 $newComment = wfMsgForContent( 'revertpage', $target->getUserText(), $from );
2124                 $newComment = $wgRequest->getText( 'summary', $newComment );
2125
2126                 # Save it!
2127                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
2128                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
2129                 $wgOut->addHTML( '<h2>' . htmlspecialchars( $newComment ) . "</h2>\n<hr />\n" );
2130
2131                 $this->updateArticle( $target->getText(), $newComment, 1, $this->mTitle->userIsWatching(), $bot );
2132                 Article::onArticleEdit( $this->mTitle );
2133
2134                 $dbw->commit();
2135                 $wgOut->returnToMain( false );
2136         }
2137
2138
2139         /**
2140          * Do standard deferred updates after page view
2141          * @access private
2142          */
2143         function viewUpdates() {
2144                 global $wgDeferredUpdateList;
2145
2146                 if ( 0 != $this->getID() ) {
2147                         global $wgDisableCounters;
2148                         if( !$wgDisableCounters ) {
2149                                 Article::incViewCount( $this->getID() );
2150                                 $u = new SiteStatsUpdate( 1, 0, 0 );
2151                                 array_push( $wgDeferredUpdateList, $u );
2152                         }
2153                 }
2154
2155                 # Update newtalk / watchlist notification status
2156                 global $wgUser;
2157                 $wgUser->clearNotification( $this->mTitle );
2158         }
2159
2160         /**
2161          * Do standard deferred updates after page edit.
2162          * Every 1000th edit, prune the recent changes table.
2163          * @access private
2164          * @param string $text
2165          */
2166         function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange, $newid) {
2167                 global $wgDeferredUpdateList, $wgMessageCache, $wgUser, $wgParser;
2168
2169                 $fname = 'Article::editUpdates';
2170                 wfProfileIn( $fname );
2171
2172                 # Parse the text
2173                 $options = new ParserOptions;
2174                 $poutput = $wgParser->parse( $text, $this->mTitle, $options, true, true, $newid );
2175
2176                 # Save it to the parser cache
2177                 $parserCache =& ParserCache::singleton();
2178                 $parserCache->save( $poutput, $this, $wgUser );
2179
2180                 # Update the links tables
2181                 $u = new LinksUpdate( $this->mTitle, $poutput );
2182                 $u->doUpdate();
2183
2184                 if ( wfRunHooks( 'ArticleEditUpdatesDeleteFromRecentchanges', array( &$this ) ) ) {
2185                         wfSeedRandom();
2186                         if ( 0 == mt_rand( 0, 999 ) ) {
2187                                 # Periodically flush old entries from the recentchanges table.
2188                                 global $wgRCMaxAge;
2189
2190                                 $dbw =& wfGetDB( DB_MASTER );
2191                                 $cutoff = $dbw->timestamp( time() - $wgRCMaxAge );
2192                                 $recentchanges = $dbw->tableName( 'recentchanges' );
2193                                 $sql = "DELETE FROM $recentchanges WHERE rc_timestamp < '{$cutoff}'";
2194                                 $dbw->query( $sql );
2195                         }
2196                 }
2197
2198                 $id = $this->getID();
2199                 $title = $this->mTitle->getPrefixedDBkey();
2200                 $shortTitle = $this->mTitle->getDBkey();
2201
2202                 if ( 0 == $id ) {
2203                         wfProfileOut( $fname );
2204                         return;
2205                 }
2206
2207                 $u = new SiteStatsUpdate( 0, 1, $this->mGoodAdjustment, $this->mTotalAdjustment );
2208                 array_push( $wgDeferredUpdateList, $u );
2209                 $u = new SearchUpdate( $id, $title, $text );
2210                 array_push( $wgDeferredUpdateList, $u );
2211
2212                 # If this is another user's talk page, update newtalk
2213
2214                 if ($this->mTitle->getNamespace() == NS_USER_TALK && $shortTitle != $wgUser->getName()) {
2215                         $other = User::newFromName( $shortTitle );
2216                         if( is_null( $other ) && User::isIP( $shortTitle ) ) {
2217                                 // An anonymous user
2218                                 $other = new User();
2219                                 $other->setName( $shortTitle );
2220                         }
2221                         if( $other ) {
2222                                 $other->setNewtalk( true );
2223                         }
2224                 }
2225
2226                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
2227                         $wgMessageCache->replace( $shortTitle, $text );
2228                 }
2229
2230                 wfProfileOut( $fname );
2231         }
2232
2233         /**
2234          * @todo document this function
2235          * @access private
2236          * @param string $oldid         Revision ID of this article revision
2237          */
2238         function setOldSubtitle( $oldid=0 ) {
2239                 global $wgLang, $wgOut, $wgUser;
2240
2241                 $current = ( $oldid == $this->mLatest );
2242                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
2243                 $sk = $wgUser->getSkin();
2244                 $lnk = $current
2245                         ? wfMsg( 'currentrevisionlink' )
2246                         : $lnk = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
2247                 $prevlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid );
2248                 $nextlink = $current
2249                         ? wfMsg( 'nextrevision' )
2250                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
2251                 $r = wfMsg( 'revisionasofwithlink', $td, $lnk, $prevlink, $nextlink );
2252                 $wgOut->setSubtitle( $r );
2253         }
2254
2255         /**
2256          * This function is called right before saving the wikitext,
2257          * so we can do things like signatures and links-in-context.
2258          *
2259          * @param string $text
2260          */
2261         function preSaveTransform( $text ) {
2262                 global $wgParser, $wgUser;
2263                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
2264         }
2265
2266         /* Caching functions */
2267
2268         /**
2269          * checkLastModified returns true if it has taken care of all
2270          * output to the client that is necessary for this request.
2271          * (that is, it has sent a cached version of the page)
2272          */
2273         function tryFileCache() {
2274                 static $called = false;
2275                 if( $called ) {
2276                         wfDebug( " tryFileCache() -- called twice!?\n" );
2277                         return;
2278                 }
2279                 $called = true;
2280                 if($this->isFileCacheable()) {
2281                         $touched = $this->mTouched;
2282                         $cache = new CacheManager( $this->mTitle );
2283                         if($cache->isFileCacheGood( $touched )) {
2284                                 global $wgOut;
2285                                 wfDebug( " tryFileCache() - about to load\n" );
2286                                 $cache->loadFromFileCache();
2287                                 return true;
2288                         } else {
2289                                 wfDebug( " tryFileCache() - starting buffer\n" );
2290                                 ob_start( array(&$cache, 'saveToFileCache' ) );
2291                         }
2292                 } else {
2293                         wfDebug( " tryFileCache() - not cacheable\n" );
2294                 }
2295         }
2296
2297         /**
2298          * Check if the page can be cached
2299          * @return bool
2300          */
2301         function isFileCacheable() {
2302                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
2303                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
2304
2305                 return $wgUseFileCache
2306                         and (!$wgShowIPinHeader)
2307                         and ($this->getID() != 0)
2308                         and ($wgUser->isAnon())
2309                         and (!$wgUser->getNewtalk())
2310                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
2311                         and (empty( $action ) || $action == 'view')
2312                         and (!isset($oldid))
2313                         and (!isset($diff))
2314                         and (!isset($redirect))
2315                         and (!isset($printable))
2316                         and (!$this->mRedirectedFrom);
2317         }
2318
2319         /**
2320          * Loads page_touched and returns a value indicating if it should be used
2321          *
2322          */
2323         function checkTouched() {
2324                 $fname = 'Article::checkTouched';
2325                 if( !$this->mDataLoaded ) {
2326                         $dbr =& $this->getDB();
2327                         $data = $this->pageDataFromId( $dbr, $this->getId() );
2328                         if( $data ) {
2329                                 $this->loadPageData( $data );
2330                         }
2331                 }
2332                 return !$this->mIsRedirect;
2333         }
2334
2335         /**
2336          * Get the page_touched field
2337          */
2338         function getTouched() {
2339                 # Ensure that page data has been loaded
2340                 if( !$this->mDataLoaded ) {
2341                         $dbr =& $this->getDB();
2342                         $data = $this->pageDataFromId( $dbr, $this->getId() );
2343                         if( $data ) {
2344                                 $this->loadPageData( $data );
2345                         }
2346                 }
2347                 return $this->mTouched;
2348         }
2349
2350         /**
2351          * Edit an article without doing all that other stuff
2352          * The article must already exist; link tables etc
2353          * are not updated, caches are not flushed.
2354          *
2355          * @param string $text text submitted
2356          * @param string $comment comment submitted
2357          * @param bool $minor whereas it's a minor modification
2358          */
2359         function quickEdit( $text, $comment = '', $minor = 0 ) {
2360                 $fname = 'Article::quickEdit';
2361                 wfProfileIn( $fname );
2362
2363                 $dbw =& wfGetDB( DB_MASTER );
2364                 $dbw->begin();
2365                 $revision = new Revision( array(
2366                         'page'       => $this->getId(),
2367                         'text'       => $text,
2368                         'comment'    => $comment,
2369                         'minor_edit' => $minor ? 1 : 0,
2370                         ) );
2371                 $revisionId = $revision->insertOn( $dbw );
2372                 $this->updateRevisionOn( $dbw, $revision );
2373                 $dbw->commit();
2374
2375                 wfProfileOut( $fname );
2376         }
2377
2378         /**
2379          * Used to increment the view counter
2380          *
2381          * @static
2382          * @param integer $id article id
2383          */
2384         function incViewCount( $id ) {
2385                 $id = intval( $id );
2386                 global $wgHitcounterUpdateFreq;
2387
2388                 $dbw =& wfGetDB( DB_MASTER );
2389                 $pageTable = $dbw->tableName( 'page' );
2390                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
2391                 $acchitsTable = $dbw->tableName( 'acchits' );
2392
2393                 if( $wgHitcounterUpdateFreq <= 1 ){ //
2394                         $dbw->query( "UPDATE $pageTable SET page_counter = page_counter + 1 WHERE page_id = $id" );
2395                         return;
2396                 }
2397
2398                 # Not important enough to warrant an error page in case of failure
2399                 $oldignore = $dbw->ignoreErrors( true );
2400
2401                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2402
2403                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2404                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2405                         # Most of the time (or on SQL errors), skip row count check
2406                         $dbw->ignoreErrors( $oldignore );
2407                         return;
2408                 }
2409
2410                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2411                 $row = $dbw->fetchObject( $res );
2412                 $rown = intval( $row->n );
2413                 if( $rown >= $wgHitcounterUpdateFreq ){
2414                         wfProfileIn( 'Article::incViewCount-collect' );
2415                         $old_user_abort = ignore_user_abort( true );
2416
2417                         $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2418                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable TYPE=HEAP ".
2419                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2420                                 'GROUP BY hc_id');
2421                         $dbw->query("DELETE FROM $hitcounterTable");
2422                         $dbw->query('UNLOCK TABLES');
2423                         $dbw->query("UPDATE $pageTable,$acchitsTable SET page_counter=page_counter + hc_n ".
2424                                 'WHERE page_id = hc_id');
2425                         $dbw->query("DROP TABLE $acchitsTable");
2426
2427                         ignore_user_abort( $old_user_abort );
2428                         wfProfileOut( 'Article::incViewCount-collect' );
2429                 }
2430                 $dbw->ignoreErrors( $oldignore );
2431         }
2432
2433         /**#@+
2434          * The onArticle*() functions are supposed to be a kind of hooks
2435          * which should be called whenever any of the specified actions
2436          * are done.
2437          *
2438          * This is a good place to put code to clear caches, for instance.
2439          *
2440          * This is called on page move and undelete, as well as edit
2441          * @static
2442          * @param $title_obj a title object
2443          */
2444
2445         function onArticleCreate($title_obj) {
2446                 global $wgUseSquid, $wgPostCommitUpdateList;
2447
2448                 $title_obj->touchLinks();
2449                 $titles = $title_obj->getLinksTo();
2450
2451                 # Purge squid
2452                 if ( $wgUseSquid ) {
2453                         $urls = $title_obj->getSquidURLs();
2454                         foreach ( $titles as $linkTitle ) {
2455                                 $urls[] = $linkTitle->getInternalURL();
2456                         }
2457                         $u = new SquidUpdate( $urls );
2458                         array_push( $wgPostCommitUpdateList, $u );
2459                 }
2460         }
2461
2462         function onArticleDelete( $title ) {
2463                 global $wgMessageCache;
2464
2465                 $title->touchLinks();
2466
2467                 if( $title->getNamespace() == NS_MEDIAWIKI) {
2468                         $wgMessageCache->replace( $title->getDBkey(), false );
2469                 }
2470         }
2471
2472         /**
2473          * Purge caches on page update etc
2474          */
2475         function onArticleEdit( $title ) {
2476                 global $wgUseSquid, $wgPostCommitUpdateList, $wgUseFileCache;
2477
2478                 $urls = array();
2479
2480                 // Template namespace? Purge all articles linking here.
2481                 // FIXME: When a templatelinks table arrives, use it for all includes.
2482                 if ( $title->getNamespace() == NS_TEMPLATE) {
2483                         $titles = $title->getLinksTo();
2484                         Title::touchArray( $titles );
2485                         if ( $wgUseSquid ) {
2486                                 foreach ( $titles as $link ) {
2487                                         $urls[] = $link->getInternalURL();
2488                                 }
2489                         }
2490                 }
2491
2492                 # Squid updates
2493                 if ( $wgUseSquid ) {
2494                         $urls = array_merge( $urls, $title->getSquidURLs() );
2495                         $u = new SquidUpdate( $urls );
2496                         array_push( $wgPostCommitUpdateList, $u );
2497                 }
2498
2499                 # File cache
2500                 if ( $wgUseFileCache ) {
2501                         $cm = new CacheManager( $title );
2502                         @unlink( $cm->fileCacheName() );
2503                 }
2504         }
2505
2506         /**#@-*/
2507
2508         /**
2509          * Info about this page
2510          * Called for ?action=info when $wgAllowPageInfo is on.
2511          *
2512          * @access public
2513          */
2514         function info() {
2515                 global $wgLang, $wgOut, $wgAllowPageInfo, $wgUser;
2516                 $fname = 'Article::info';
2517
2518                 if ( !$wgAllowPageInfo ) {
2519                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
2520                         return;
2521                 }
2522
2523                 $page = $this->mTitle->getSubjectPage();
2524
2525                 $wgOut->setPagetitle( $page->getPrefixedText() );
2526                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
2527
2528                 # first, see if the page exists at all.
2529                 $exists = $page->getArticleId() != 0;
2530                 if( !$exists ) {
2531                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
2532                                 $wgOut->addHTML(wfMsgWeirdKey ( $this->mTitle->getText() ) );
2533                         } else {
2534                                 $wgOut->addHTML(wfMsg( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon' ) );
2535                         }
2536                 } else {
2537                         $dbr =& wfGetDB( DB_SLAVE );
2538                         $wl_clause = array(
2539                                 'wl_title'     => $page->getDBkey(),
2540                                 'wl_namespace' => $page->getNamespace() );
2541                         $numwatchers = $dbr->selectField(
2542                                 'watchlist',
2543                                 'COUNT(*)',
2544                                 $wl_clause,
2545                                 $fname,
2546                                 $this->getSelectOptions() );
2547
2548                         $pageInfo = $this->pageCountInfo( $page );
2549                         $talkInfo = $this->pageCountInfo( $page->getTalkPage() );
2550
2551                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $wgLang->formatNum( $numwatchers ) ) . '</li>' );
2552                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $wgLang->formatNum( $pageInfo['edits'] ) ) . '</li>');
2553                         if( $talkInfo ) {
2554                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $wgLang->formatNum( $talkInfo['edits'] ) ) . '</li>');
2555                         }
2556                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $wgLang->formatNum( $pageInfo['authors'] ) ) . '</li>' );
2557                         if( $talkInfo ) {
2558                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $wgLang->formatNum( $talkInfo['authors'] ) ) . '</li>' );
2559                         }
2560                         $wgOut->addHTML( '</ul>' );
2561
2562                 }
2563         }
2564
2565         /**
2566          * Return the total number of edits and number of unique editors
2567          * on a given page. If page does not exist, returns false.
2568          *
2569          * @param Title $title
2570          * @return array
2571          * @access private
2572          */
2573         function pageCountInfo( $title ) {
2574                 $id = $title->getArticleId();
2575                 if( $id == 0 ) {
2576                         return false;
2577                 }
2578
2579                 $dbr =& wfGetDB( DB_SLAVE );
2580
2581                 $rev_clause = array( 'rev_page' => $id );
2582                 $fname = 'Article::pageCountInfo';
2583
2584                 $edits = $dbr->selectField(
2585                         'revision',
2586                         'COUNT(rev_page)',
2587                         $rev_clause,
2588                         $fname,
2589                         $this->getSelectOptions() );
2590
2591                 $authors = $dbr->selectField(
2592                         'revision',
2593                         'COUNT(DISTINCT rev_user_text)',
2594                         $rev_clause,
2595                         $fname,
2596                         $this->getSelectOptions() );
2597
2598                 return array( 'edits' => $edits, 'authors' => $authors );
2599         }
2600
2601         /**
2602          * Return a list of templates used by this article.
2603          * Uses the templatelinks table
2604          *
2605          * @return array Array of Title objects
2606          */
2607         function getUsedTemplates() {
2608                 $result = array();
2609                 $id = $this->mTitle->getArticleID();
2610
2611                 $dbr =& wfGetDB( DB_SLAVE );
2612                 $res = $dbr->select( array( 'templatelinks' ),
2613                         array( 'tl_namespace', 'tl_title' ),
2614                         array( 'tl_from' => $id ),
2615                         'Article:getUsedTemplates' );
2616                 if ( false !== $res ) {
2617                         if ( $dbr->numRows( $res ) ) {
2618                                 while ( $row = $dbr->fetchObject( $res ) ) {
2619                                         $result[] = Title::makeTitle( $row->tl_namespace, $row->tl_title );
2620                                 }
2621                         }
2622                 }
2623                 $dbr->freeResult( $res );
2624                 return $result;
2625         }
2626 }
2627
2628 ?>