includes/Article.php

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