includes/Article.php

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