includes/Article.php

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