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