includes/Article.php

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