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