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