includes/Article.php

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