includes/Article.php

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