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