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