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 global $wgArticleCurContentFields, $wgArticleOldContentFields;
  13
  14 $wgArticleCurContentFields = false;
  15 $wgArticleOldContentFields = false;
  16
  17 /**
  18  * Class representing a MediaWiki article and history.
  19  *
  20  * See design.txt for an overview.
  21  * Note: edit user interface and cache support functions have been
  22  * moved to separate EditPage and CacheManager classes.
  23  *
  24  * @package MediaWiki
  25  */
  26 class Article {
  27         /**@{{
  28          * @private
  29          */
  30         var $mComment;                  //!<
  31         var $mContent;                  //!<
  32         var $mContentLoaded;    //!<
  33         var $mCounter;                  //!<
  34         var $mFileCache;                //!<
  35         var $mForUpdate;                //!<
  36         var $mGoodAdjustment;   //!<
  37         var $mId;                               //!<
  38         var $mLatest;                   //!<
  39         var $mMinorEdit;                //!<
  40         var $mOldId;                    //!<
  41         var $mRedirectedFrom;   //!<
  42         var $mRedirectUrl;              //!<
  43         var $mRevIdFetched;             //!<
  44         var $mRevision;                 //!<
  45         var $mTable;                    //!<
  46         var $mTimestamp;                //!<
  47         var $mTitle;                    //!<
  48         var $mTotalAdjustment;  //!<
  49         var $mTouched;                  //!<
  50         var $mUser;                             //!<
  51         var $mUserText;                 //!<
  52         /**@}}*/
  53
  54         /**
  55          * Constructor and clear the article
  56          * @param $title Reference to a Title object.
  57          * @param $oldId Integer revision ID, null to fetch from request, zero for current
  58          */
  59         function Article( &$title, $oldId = null ) {
  60                 $this->mTitle =& $title;
  61                 $this->mOldId = $oldId;
  62                 $this->clear();
  63         }
  64
  65         /**
  66          * Tell the page view functions that this view was redirected
  67          * from another page on the wiki.
  68          * @param $from Title object.
  69          */
  70         function setRedirectedFrom( $from ) {
  71                 $this->mRedirectedFrom = $from;
  72         }
  73
  74         /**
  75          * @return mixed false, Title of in-wiki target, or string with URL
  76          */
  77         function followRedirect() {
  78                 $text = $this->getContent();
  79                 $rt = Title::newFromRedirect( $text );
  80
  81                 # process if title object is valid and not special:userlogout
  82                 if( $rt ) {
  83                         if( $rt->getInterwiki() != '' ) {
  84                                 if( $rt->isLocal() ) {
  85                                         // Offsite wikis need an HTTP redirect.
  86                                         //
  87                                         // This can be hard to reverse and may produce loops,
  88                                         // so they may be disabled in the site configuration.
  89
  90                                         $source = $this->mTitle->getFullURL( 'redirect=no' );
  91                                         return $rt->getFullURL( 'rdfrom=' . urlencode( $source ) );
  92                                 }
  93                         } else {
  94                                 if( $rt->getNamespace() == NS_SPECIAL ) {
  95                                         // Gotta hand redirects to special pages differently:
  96                                         // Fill the HTTP response "Location" header and ignore
  97                                         // the rest of the page we're on.
  98                                         //
  99                                         // This can be hard to reverse, so they may be disabled.
 100
 101                                         if( $rt->getNamespace() == NS_SPECIAL && $rt->getText() == 'Userlogout' ) {
 102                                                 // rolleyes
 103                                         } else {
 104                                                 return $rt->getFullURL();
 105                                         }
 106                                 }
 107                                 return $rt;
 108                         }
 109                 }
 110
 111                 // No or invalid redirect
 112                 return false;
 113         }
 114
 115         /**
 116          * get the title object of the article
 117          */
 118         function getTitle() {
 119                 return $this->mTitle;
 120         }
 121
 122         /**
 123           * Clear the object
 124           * @private
 125           */
 126         function clear() {
 127                 $this->mDataLoaded    = false;
 128                 $this->mContentLoaded = false;
 129
 130                 $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
 131                 $this->mRedirectedFrom = null; # Title object if set
 132                 $this->mUserText =
 133                 $this->mTimestamp = $this->mComment = $this->mFileCache = '';
 134                 $this->mGoodAdjustment = $this->mTotalAdjustment = 0;
 135                 $this->mTouched = '19700101000000';
 136                 $this->mForUpdate = false;
 137                 $this->mIsRedirect = false;
 138                 $this->mRevIdFetched = 0;
 139                 $this->mRedirectUrl = false;
 140                 $this->mLatest = false;
 141         }
 142
 143         /**
 144          * Note that getContent/loadContent do not follow redirects anymore.
 145          * If you need to fetch redirectable content easily, try
 146          * the shortcut in Article::followContent()
 147          * FIXME
 148          * @todo There are still side-effects in this!
 149          *        In general, you should use the Revision class, not Article,
 150          *        to fetch text for purposes other than page views.
 151          *
 152          * @return Return the text of this revision
 153         */
 154         function getContent() {
 155                 global $wgRequest, $wgUser, $wgOut;
 156
 157                 # Get variables from query string :P
 158                 $action = $wgRequest->getText( 'action', 'view' );
 159                 $section = $wgRequest->getText( 'section' );
 160                 $preload = $wgRequest->getText( 'preload' );
 161
 162                 $fname =  'Article::getContent';
 163                 wfProfileIn( $fname );
 164
 165                 if ( 0 == $this->getID() ) {
 166                         if ( 'edit' == $action ) {
 167                                 wfProfileOut( $fname );
 168
 169                                 # If requested, preload some text.
 170                                 $text=$this->getPreloadedText($preload);
 171
 172                                 # We used to put MediaWiki:Newarticletext here if
 173                                 # $text was empty at this point.
 174                                 # This is now shown above the edit box instead.
 175                                 return $text;
 176                         }
 177                         wfProfileOut( $fname );
 178                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
 179
 180                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 181                                 $ret = wfMsgWeirdKey ( $this->mTitle->getText() ) ;
 182                         } else {
 183                                 $ret = wfMsg( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon' );
 184                         }
 185
 186                         return "<div class='noarticletext'>$ret</div>";
 187                 } else {
 188                         $this->loadContent();
 189                         if($action=='edit') {
 190                                 if($section!='') {
 191                                         if($section=='new') {
 192                                                 wfProfileOut( $fname );
 193                                                 $text=$this->getPreloadedText($preload);
 194                                                 return $text;
 195                                         }
 196
 197                                         # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 198                                         # comments to be stripped as well)
 199                                         $rv=$this->getSection($this->mContent,$section);
 200                                         wfProfileOut( $fname );
 201                                         return $rv;
 202                                 }
 203                         }
 204                         wfProfileOut( $fname );
 205                         return $this->mContent;
 206                 }
 207         }
 208
 209         /**
 210          * Get the contents of a page from its title and remove includeonly tags
 211          *
 212          * @param $preload String: the title of the page.
 213          * @return string The contents of the page.
 214          */
 215         function getPreloadedText($preload) {
 216                 if ( $preload === '' )
 217                         return '';
 218                 else {
 219                         $preloadTitle = Title::newFromText( $preload );
 220                         if ( isset( $preloadTitle ) && $preloadTitle->userCanRead() ) {
 221                                 $rev=Revision::newFromTitle($preloadTitle);
 222                                 if ( is_object( $rev ) ) {
 223                                         $text = $rev->getText();
 224                                         // TODO FIXME: AAAAAAAAAAA, this shouldn't be implementing
 225                                         // its own mini-parser! -ævar
 226                                         $text = preg_replace( '~</?includeonly>~', '', $text );
 227                                         return $text;
 228                                 } else
 229                                         return '';
 230                         }
 231                 }
 232         }
 233
 234         /**
 235          * This function returns the text of a section, specified by a number ($section).
 236          * A section is text under a heading like == Heading == or \<h1\>Heading\</h1\>, or
 237          * the first section before any such heading (section 0).
 238          *
 239          * If a section contains subsections, these are also returned.
 240          *
 241          * @param $text String: text to look in
 242          * @param $section Integer: section number
 243          * @return string text of the requested section
 244          */
 245         function getSection($text,$section) {
 246                 global $wgParser;
 247                 return $wgParser->getSection( $text, $section );
 248         }
 249
 250         /**
 251          * @return int The oldid of the article that is to be shown, 0 for the
 252          *             current revision
 253          */
 254         function getOldID() {
 255                 if ( is_null( $this->mOldId ) ) {
 256                         $this->mOldId = $this->getOldIDFromRequest();
 257                 }
 258                 return $this->mOldId;
 259         }
 260
 261         /**
 262          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 263          *
 264          * @return int The old id for the request
 265          */
 266         function getOldIDFromRequest() {
 267                 global $wgRequest;
 268                 $this->mRedirectUrl = false;
 269                 $oldid = $wgRequest->getVal( 'oldid' );
 270                 if ( isset( $oldid ) ) {
 271                         $oldid = intval( $oldid );
 272                         if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 273                                 $nextid = $this->mTitle->getNextRevisionID( $oldid );
 274                                 if ( $nextid  ) {
 275                                         $oldid = $nextid;
 276                                 } else {
 277                                         $this->mRedirectUrl = $this->mTitle->getFullURL( 'redirect=no' );
 278                                 }
 279                         } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 280                                 $previd = $this->mTitle->getPreviousRevisionID( $oldid );
 281                                 if ( $previd ) {
 282                                         $oldid = $previd;
 283                                 } else {
 284                                         # TODO
 285                                 }
 286                         }
 287                         # unused:
 288                         # $lastid = $oldid;
 289                 }
 290                 if ( !$oldid ) {
 291                         $oldid = 0;
 292                 }
 293                 return $oldid;
 294         }
 295
 296         /**
 297          * Load the revision (including text) into this object
 298          */
 299         function loadContent() {
 300                 if ( $this->mContentLoaded ) return;
 301
 302                 # Query variables :P
 303                 $oldid = $this->getOldID();
 304
 305                 # Pre-fill content with error message so that if something
 306                 # fails we'll have something telling us what we intended.
 307
 308                 $t = $this->mTitle->getPrefixedText();
 309
 310                 $this->mOldId = $oldid;
 311                 $this->fetchContent( $oldid );
 312         }
 313
 314
 315         /**
 316          * Fetch a page record with the given conditions
 317          * @param Database $dbr
 318          * @param array    $conditions
 319          * @private
 320          */
 321         function pageData( &$dbr, $conditions ) {
 322                 $fields = array(
 323                                 'page_id',
 324                                 'page_namespace',
 325                                 'page_title',
 326                                 'page_restrictions',
 327                                 'page_counter',
 328                                 'page_is_redirect',
 329                                 'page_is_new',
 330                                 'page_random',
 331                                 'page_touched',
 332                                 'page_latest',
 333                                 'page_len' ) ;
 334                 wfRunHooks( 'ArticlePageDataBefore', array( &$this , &$fields ) )       ;
 335                 $row = $dbr->selectRow( 'page',
 336                         $fields,
 337                         $conditions,
 338                         'Article::pageData' );
 339                 wfRunHooks( 'ArticlePageDataAfter', array( &$this , &$row ) )   ;
 340                 return $row ;
 341         }
 342
 343         /**
 344          * @param Database $dbr
 345          * @param Title $title
 346          */
 347         function pageDataFromTitle( &$dbr, $title ) {
 348                 return $this->pageData( $dbr, array(
 349                         'page_namespace' => $title->getNamespace(),
 350                         'page_title'     => $title->getDBkey() ) );
 351         }
 352
 353         /**
 354          * @param Database $dbr
 355          * @param int $id
 356          */
 357         function pageDataFromId( &$dbr, $id ) {
 358                 return $this->pageData( $dbr, array( 'page_id' => $id ) );
 359         }
 360
 361         /**
 362          * Set the general counter, title etc data loaded from
 363          * some source.
 364          *
 365          * @param object $data
 366          * @private
 367          */
 368         function loadPageData( $data = 'fromdb' ) {
 369                 if ( $data === 'fromdb' ) {
 370                         $dbr =& $this->getDB();
 371                         $data = $this->pageDataFromId( $dbr, $this->getId() );
 372                 }
 373
 374                 $lc =& LinkCache::singleton();
 375                 if ( $data ) {
 376                         $lc->addGoodLinkObj( $data->page_id, $this->mTitle );
 377
 378                         $this->mTitle->mArticleID = $data->page_id;
 379                         $this->mTitle->loadRestrictions( $data->page_restrictions );
 380                         $this->mTitle->mRestrictionsLoaded = true;
 381
 382                         $this->mCounter     = $data->page_counter;
 383                         $this->mTouched     = wfTimestamp( TS_MW, $data->page_touched );
 384                         $this->mIsRedirect  = $data->page_is_redirect;
 385                         $this->mLatest      = $data->page_latest;
 386                 } else {
 387                         if ( is_object( $this->mTitle ) ) {
 388                                 $lc->addBadLinkObj( $this->mTitle );
 389                         }
 390                         $this->mTitle->mArticleID = 0;
 391                 }
 392
 393                 $this->mDataLoaded  = true;
 394         }
 395
 396         /**
 397          * Get text of an article from database
 398          * Does *NOT* follow redirects.
 399          * @param int $oldid 0 for whatever the latest revision is
 400          * @return string
 401          */
 402         function fetchContent( $oldid = 0 ) {
 403                 if ( $this->mContentLoaded ) {
 404                         return $this->mContent;
 405                 }
 406
 407                 $dbr =& $this->getDB();
 408                 $fname = 'Article::fetchContent';
 409
 410                 # Pre-fill content with error message so that if something
 411                 # fails we'll have something telling us what we intended.
 412                 $t = $this->mTitle->getPrefixedText();
 413                 if( $oldid ) {
 414                         $t .= ',oldid='.$oldid;
 415                 }
 416                 $this->mContent = wfMsg( 'missingarticle', $t ) ;
 417
 418                 if( $oldid ) {
 419                         $revision = Revision::newFromId( $oldid );
 420                         if( is_null( $revision ) ) {
 421                                 wfDebug( "$fname failed to retrieve specified revision, id $oldid\n" );
 422                                 return false;
 423                         }
 424                         $data = $this->pageDataFromId( $dbr, $revision->getPage() );
 425                         if( !$data ) {
 426                                 wfDebug( "$fname failed to get page data linked to revision id $oldid\n" );
 427                                 return false;
 428                         }
 429                         $this->mTitle = Title::makeTitle( $data->page_namespace, $data->page_title );
 430                         $this->loadPageData( $data );
 431                 } else {
 432                         if( !$this->mDataLoaded ) {
 433                                 $data = $this->pageDataFromTitle( $dbr, $this->mTitle );
 434                                 if( !$data ) {
 435                                         wfDebug( "$fname failed to find page data for title " . $this->mTitle->getPrefixedText() . "\n" );
 436                                         return false;
 437                                 }
 438                                 $this->loadPageData( $data );
 439                         }
 440                         $revision = Revision::newFromId( $this->mLatest );
 441                         if( is_null( $revision ) ) {
 442                                 wfDebug( "$fname failed to retrieve current page, rev_id {$data->page_latest}\n" );
 443                                 return false;
 444                         }
 445                 }
 446
 447                 // FIXME: Horrible, horrible! This content-loading interface just plain sucks.
 448                 // We should instead work with the Revision object when we need it...
 449                 $this->mContent = $revision->userCan( Revision::MW_REV_DELETED_TEXT ) ? $revision->getRawText() : "";
 450                 //$this->mContent   = $revision->getText();
 451
 452                 $this->mUser      = $revision->getUser();
 453                 $this->mUserText  = $revision->getUserText();
 454                 $this->mComment   = $revision->getComment();
 455                 $this->mTimestamp = wfTimestamp( TS_MW, $revision->getTimestamp() );
 456
 457                 $this->mRevIdFetched = $revision->getID();
 458                 $this->mContentLoaded = true;
 459                 $this->mRevision =& $revision;
 460
 461                 wfRunHooks( 'ArticleAfterFetchContent', array( &$this, &$this->mContent ) ) ;
 462
 463                 return $this->mContent;
 464         }
 465
 466         /**
 467          * Read/write accessor to select FOR UPDATE
 468          *
 469          * @param $x Mixed: FIXME
 470          */
 471         function forUpdate( $x = NULL ) {
 472                 return wfSetVar( $this->mForUpdate, $x );
 473         }
 474
 475         /**
 476          * Get the database which should be used for reads
 477          *
 478          * @return Database
 479          */
 480         function &getDB() {
 481                 $ret =& wfGetDB( DB_MASTER );
 482                 return $ret;
 483         }
 484
 485         /**
 486          * Get options for all SELECT statements
 487          *
 488          * @param $options Array: an optional options array which'll be appended to
 489          *                       the default
 490          * @return Array: options
 491          */
 492         function getSelectOptions( $options = '' ) {
 493                 if ( $this->mForUpdate ) {
 494                         if ( is_array( $options ) ) {
 495                                 $options[] = 'FOR UPDATE';
 496                         } else {
 497                                 $options = 'FOR UPDATE';
 498                         }
 499                 }
 500                 return $options;
 501         }
 502
 503         /**
 504          * @return int Page ID
 505          */
 506         function getID() {
 507                 if( $this->mTitle ) {
 508                         return $this->mTitle->getArticleID();
 509                 } else {
 510                         return 0;
 511                 }
 512         }
 513
 514         /**
 515          * @return bool Whether or not the page exists in the database
 516          */
 517         function exists() {
 518                 return $this->getId() != 0;
 519         }
 520
 521         /**
 522          * @return int The view count for the page
 523          */
 524         function getCount() {
 525                 if ( -1 == $this->mCounter ) {
 526                         $id = $this->getID();
 527                         if ( $id == 0 ) {
 528                                 $this->mCounter = 0;
 529                         } else {
 530                                 $dbr =& wfGetDB( DB_SLAVE );
 531                                 $this->mCounter = $dbr->selectField( 'page', 'page_counter', array( 'page_id' => $id ),
 532                                         'Article::getCount', $this->getSelectOptions() );
 533                         }
 534                 }
 535                 return $this->mCounter;
 536         }
 537
 538         /**
 539          * Determine whether a page  would be suitable for being counted as an
 540          * article in the site_stats table based on the title & its content
 541          *
 542          * @param $text String: text to analyze
 543          * @return bool
 544          */
 545         function isCountable( $text ) {
 546                 global $wgUseCommaCount;
 547
 548                 $token = $wgUseCommaCount ? ',' : '[[';
 549                 return
 550                         $this->mTitle->getNamespace() == NS_MAIN
 551                         && ! $this->isRedirect( $text )
 552                         && in_string( $token, $text );
 553         }
 554
 555         /**
 556          * Tests if the article text represents a redirect
 557          *
 558          * @param $text String: FIXME
 559          * @return bool
 560          */
 561         function isRedirect( $text = false ) {
 562                 if ( $text === false ) {
 563                         $this->loadContent();
 564                         $titleObj = Title::newFromRedirect( $this->fetchContent() );
 565                 } else {
 566                         $titleObj = Title::newFromRedirect( $text );
 567                 }
 568                 return $titleObj !== NULL;
 569         }
 570
 571         /**
 572          * Returns true if the currently-referenced revision is the current edit
 573          * to this page (and it exists).
 574          * @return bool
 575          */
 576         function isCurrent() {
 577                 return $this->exists() &&
 578                         isset( $this->mRevision ) &&
 579                         $this->mRevision->isCurrent();
 580         }
 581
 582         /**
 583          * Loads everything except the text
 584          * This isn't necessary for all uses, so it's only done if needed.
 585          * @private
 586          */
 587         function loadLastEdit() {
 588                 if ( -1 != $this->mUser )
 589                         return;
 590
 591                 # New or non-existent articles have no user information
 592                 $id = $this->getID();
 593                 if ( 0 == $id ) return;
 594
 595                 $this->mLastRevision = Revision::loadFromPageId( $this->getDB(), $id );
 596                 if( !is_null( $this->mLastRevision ) ) {
 597                         $this->mUser      = $this->mLastRevision->getUser();
 598                         $this->mUserText  = $this->mLastRevision->getUserText();
 599                         $this->mTimestamp = $this->mLastRevision->getTimestamp();
 600                         $this->mComment   = $this->mLastRevision->getComment();
 601                         $this->mMinorEdit = $this->mLastRevision->isMinor();
 602                         $this->mRevIdFetched = $this->mLastRevision->getID();
 603                 }
 604         }
 605
 606         function getTimestamp() {
 607                 // Check if the field has been filled by ParserCache::get()
 608                 if ( !$this->mTimestamp ) {
 609                         $this->loadLastEdit();
 610                 }
 611                 return wfTimestamp(TS_MW, $this->mTimestamp);
 612         }
 613
 614         function getUser() {
 615                 $this->loadLastEdit();
 616                 return $this->mUser;
 617         }
 618
 619         function getUserText() {
 620                 $this->loadLastEdit();
 621                 return $this->mUserText;
 622         }
 623
 624         function getComment() {
 625                 $this->loadLastEdit();
 626                 return $this->mComment;
 627         }
 628
 629         function getMinorEdit() {
 630                 $this->loadLastEdit();
 631                 return $this->mMinorEdit;
 632         }
 633
 634         function getRevIdFetched() {
 635                 $this->loadLastEdit();
 636                 return $this->mRevIdFetched;
 637         }
 638
 639         /**
 640          * @todo Document, fixme $offset never used.
 641          * @param $limit Integer: default 0.
 642          * @param $offset Integer: default 0.
 643          */
 644         function getContributors($limit = 0, $offset = 0) {
 645                 $fname = 'Article::getContributors';
 646
 647                 # XXX: this is expensive; cache this info somewhere.
 648
 649                 $title = $this->mTitle;
 650                 $contribs = array();
 651                 $dbr =& wfGetDB( DB_SLAVE );
 652                 $revTable = $dbr->tableName( 'revision' );
 653                 $userTable = $dbr->tableName( 'user' );
 654                 $encDBkey = $dbr->addQuotes( $title->getDBkey() );
 655                 $ns = $title->getNamespace();
 656                 $user = $this->getUser();
 657                 $pageId = $this->getId();
 658
 659                 $sql = "SELECT rev_user, rev_user_text, user_real_name, MAX(rev_timestamp) as timestamp
 660                         FROM $revTable LEFT JOIN $userTable ON rev_user = user_id
 661                         WHERE rev_page = $pageId
 662                         AND rev_user != $user
 663                         GROUP BY rev_user, rev_user_text, user_real_name
 664                         ORDER BY timestamp DESC";
 665
 666                 if ($limit > 0) { $sql .= ' LIMIT '.$limit; }
 667                 $sql .= ' '. $this->getSelectOptions();
 668
 669                 $res = $dbr->query($sql, $fname);
 670
 671                 while ( $line = $dbr->fetchObject( $res ) ) {
 672                         $contribs[] = array($line->rev_user, $line->rev_user_text, $line->user_real_name);
 673                 }
 674
 675                 $dbr->freeResult($res);
 676                 return $contribs;
 677         }
 678
 679         /**
 680          * This is the default action of the script: just view the page of
 681          * the given title.
 682         */
 683         function view() {
 684                 global $wgUser, $wgOut, $wgRequest, $wgContLang;
 685                 global $wgEnableParserCache, $wgStylePath, $wgUseRCPatrol, $wgParser;
 686                 global $wgUseTrackbacks, $wgNamespaceRobotPolicies;
 687                 $sk = $wgUser->getSkin();
 688
 689                 $fname = 'Article::view';
 690                 wfProfileIn( $fname );
 691
 692                 $parserCache =& ParserCache::singleton();
 693                 $ns = $this->mTitle->getNamespace(); # shortcut
 694
 695                 # Get variables from query string
 696                 $oldid = $this->getOldID();
 697
 698                 # getOldID may want us to redirect somewhere else
 699                 if ( $this->mRedirectUrl ) {
 700                         $wgOut->redirect( $this->mRedirectUrl );
 701                         wfProfileOut( $fname );
 702                         return;
 703                 }
 704
 705                 $diff = $wgRequest->getVal( 'diff' );
 706                 $rcid = $wgRequest->getVal( 'rcid' );
 707                 $rdfrom = $wgRequest->getVal( 'rdfrom' );
 708
 709                 $wgOut->setArticleFlag( true );
 710                 if ( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 711                         $policy = $wgNamespaceRobotPolicies[$ns];
 712                 } else {
 713                         $policy = 'index,follow';
 714                 }
 715                 $wgOut->setRobotpolicy( $policy );
 716
 717                 # If we got diff and oldid in the query, we want to see a
 718                 # diff page instead of the article.
 719
 720                 if ( !is_null( $diff ) ) {
 721                         require_once( 'DifferenceEngine.php' );
 722                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 723
 724                         $de = new DifferenceEngine( $this->mTitle, $oldid, $diff, $rcid );
 725                         // DifferenceEngine directly fetched the revision:
 726                         $this->mRevIdFetched = $de->mNewid;
 727                         $de->showDiffPage();
 728
 729                         if( $diff == 0 ) {
 730                                 # Run view updates for current revision only
 731                                 $this->viewUpdates();
 732                         }
 733                         wfProfileOut( $fname );
 734                         return;
 735                 }
 736
 737                 if ( empty( $oldid ) && $this->checkTouched() ) {
 738                         $wgOut->setETag($parserCache->getETag($this, $wgUser));
 739
 740                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 741                                 wfProfileOut( $fname );
 742                                 return;
 743                         } else if ( $this->tryFileCache() ) {
 744                                 # tell wgOut that output is taken care of
 745                                 $wgOut->disable();
 746                                 $this->viewUpdates();
 747                                 wfProfileOut( $fname );
 748                                 return;
 749                         }
 750                 }
 751                 # Should the parser cache be used?
 752                 $pcache = $wgEnableParserCache &&
 753                         intval( $wgUser->getOption( 'stubthreshold' ) ) == 0 &&
 754                         $this->exists() &&
 755                         empty( $oldid );
 756                 wfDebug( 'Article::view using parser cache: ' . ($pcache ? 'yes' : 'no' ) . "\n" );
 757                 if ( $wgUser->getOption( 'stubthreshold' ) ) {
 758                         wfIncrStats( 'pcache_miss_stub' );
 759                 }
 760
 761                 $wasRedirected = false;
 762                 if ( isset( $this->mRedirectedFrom ) ) {
 763                         // This is an internally redirected page view.
 764                         // We'll need a backlink to the source page for navigation.
 765                         if ( wfRunHooks( 'ArticleViewRedirect', array( &$this ) ) ) {
 766                                 $sk = $wgUser->getSkin();
 767                                 $redir = $sk->makeKnownLinkObj( $this->mRedirectedFrom, '', 'redirect=no' );
 768                                 $s = wfMsg( 'redirectedfrom', $redir );
 769                                 $wgOut->setSubtitle( $s );
 770                                 $wasRedirected = true;
 771                         }
 772                 } elseif ( !empty( $rdfrom ) ) {
 773                         // This is an externally redirected view, from some other wiki.
 774                         // If it was reported from a trusted site, supply a backlink.
 775                         global $wgRedirectSources;
 776                         if( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 777                                 $sk = $wgUser->getSkin();
 778                                 $redir = $sk->makeExternalLink( $rdfrom, $rdfrom );
 779                                 $s = wfMsg( 'redirectedfrom', $redir );
 780                                 $wgOut->setSubtitle( $s );
 781                                 $wasRedirected = true;
 782                         }
 783                 }
 784
 785                 $outputDone = false;
 786                 if ( $pcache ) {
 787                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 788                                 $outputDone = true;
 789                         }
 790                 }
 791                 if ( !$outputDone ) {
 792                         $text = $this->getContent();
 793                         if ( $text === false ) {
 794                                 # Failed to load, replace text with error message
 795                                 $t = $this->mTitle->getPrefixedText();
 796                                 if( $oldid ) {
 797                                         $t .= ',oldid='.$oldid;
 798                                         $text = wfMsg( 'missingarticle', $t );
 799                                 } else {
 800                                         $text = wfMsg( 'noarticletext', $t );
 801                                 }
 802                         }
 803
 804                         # Another whitelist check in case oldid is altering the title
 805                         if ( !$this->mTitle->userCanRead() ) {
 806                                 $wgOut->loginToUse();
 807                                 $wgOut->output();
 808                                 exit;
 809                         }
 810
 811                         # We're looking at an old revision
 812
 813                         if ( !empty( $oldid ) ) {
 814                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 815                                 if( is_null( $this->mRevision ) ) {
 816                                         // FIXME: This would be a nice place to load the 'no such page' text.
 817                                 } else {
 818                                         $this->setOldSubtitle( isset($this->mOldId) ? $this->mOldId : $oldid );
 819                                         if( $this->mRevision->isDeleted( Revision::MW_REV_DELETED_TEXT ) ) {
 820                                                 if( !$this->mRevision->userCan( Revision::MW_REV_DELETED_TEXT ) ) {
 821                                                         $wgOut->addWikiText( wfMsg( 'rev-deleted-text-permission' ) );
 822                                                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 823                                                         return;
 824                                                 } else {
 825                                                         $wgOut->addWikiText( wfMsg( 'rev-deleted-text-view' ) );
 826                                                         // and we are allowed to see...
 827                                                 }
 828                                         }
 829                                 }
 830
 831                         }
 832                 }
 833                 if( !$outputDone ) {
 834                         /**
 835                          * @fixme: this hook doesn't work most of the time, as it doesn't
 836                          * trigger when the parser cache is used.
 837                          */
 838                         wfRunHooks( 'ArticleViewHeader', array( &$this ) ) ;
 839                         $wgOut->setRevisionId( $this->getRevIdFetched() );
 840                         # wrap user css and user js in pre and don't parse
 841                         # XXX: use $this->mTitle->usCssJsSubpage() when php is fixed/ a workaround is found
 842                         if (
 843                                 $ns == NS_USER &&
 844                                 preg_match('/\\/[\\w]+\\.(css|js)$/', $this->mTitle->getDBkey())
 845                         ) {
 846                                 $wgOut->addWikiText( wfMsg('clearyourcache'));
 847                                 $wgOut->addHTML( '<pre>'.htmlspecialchars($this->mContent)."\n</pre>" );
 848                         } else if ( $rt = Title::newFromRedirect( $text ) ) {
 849                                 # Display redirect
 850                                 $imageDir = $wgContLang->isRTL() ? 'rtl' : 'ltr';
 851                                 $imageUrl = $wgStylePath.'/common/images/redirect' . $imageDir . '.png';
 852                                 # Don't overwrite the subtitle if this was an old revision
 853                                 if( !$wasRedirected && $this->isCurrent() ) {
 854                                         $wgOut->setSubtitle( wfMsgHtml( 'redirectpagesub' ) );
 855                                 }
 856                                 $targetUrl = $rt->escapeLocalURL();
 857                                 # fixme unused $titleText :
 858                                 $titleText = htmlspecialchars( $rt->getPrefixedText() );
 859                                 $link = $sk->makeLinkObj( $rt );
 860
 861                                 $wgOut->addHTML( '<img src="'.$imageUrl.'" alt="#REDIRECT" />' .
 862                                   '<span class="redirectText">'.$link.'</span>' );
 863
 864                                 $parseout = $wgParser->parse($text, $this->mTitle, ParserOptions::newFromUser($wgUser));
 865                                 $wgOut->addParserOutputNoText( $parseout );
 866                         } else if ( $pcache ) {
 867                                 # Display content and save to parser cache
 868                                 $wgOut->addPrimaryWikiText( $text, $this );
 869                         } else {
 870                                 # Display content, don't attempt to save to parser cache
 871
 872                                 # Don't show section-edit links on old revisions... this way lies madness.
 873                                 if( !$this->isCurrent() ) {
 874                                         $oldEditSectionSetting = $wgOut->mParserOptions->setEditSection( false );
 875                                 }
 876                                 # Display content and don't save to parser cache
 877                                 $wgOut->addPrimaryWikiText( $text, $this, false );
 878
 879                                 if( !$this->isCurrent() ) {
 880                                         $wgOut->mParserOptions->setEditSection( $oldEditSectionSetting );
 881                                 }
 882                         }
 883                 }
 884                 /* title may have been set from the cache */
 885                 $t = $wgOut->getPageTitle();
 886                 if( empty( $t ) ) {
 887                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 888                 }
 889
 890                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 891                 if( $ns == NS_USER_TALK &&
 892                         User::isIP( $this->mTitle->getText() ) ) {
 893                         $wgOut->addWikiText( wfMsg('anontalkpagetext') );
 894                 }
 895
 896                 # If we have been passed an &rcid= parameter, we want to give the user a
 897                 # chance to mark this new article as patrolled.
 898                 if ( $wgUseRCPatrol && !is_null( $rcid ) && $rcid != 0 && $wgUser->isAllowed( 'patrol' ) ) {
 899                         $wgOut->addHTML(
 900                                 "<div class='patrollink'>" .
 901                                         wfMsg ( 'markaspatrolledlink',
 902                                         $sk->makeKnownLinkObj( $this->mTitle, wfMsg('markaspatrolledtext'), "action=markpatrolled&rcid=$rcid" )
 903                                         ) .
 904                                 '</div>'
 905                          );
 906                 }
 907
 908                 # Trackbacks
 909                 if ($wgUseTrackbacks)
 910                         $this->addTrackbacks();
 911
 912                 $this->viewUpdates();
 913                 wfProfileOut( $fname );
 914         }
 915
 916         function addTrackbacks() {
 917                 global $wgOut, $wgUser;
 918
 919                 $dbr =& wfGetDB(DB_SLAVE);
 920                 $tbs = $dbr->select(
 921                                 /* FROM   */ 'trackbacks',
 922                                 /* SELECT */ array('tb_id', 'tb_title', 'tb_url', 'tb_ex', 'tb_name'),
 923                                 /* WHERE  */ array('tb_page' => $this->getID())
 924                 );
 925
 926                 if (!$dbr->numrows($tbs))
 927                         return;
 928
 929                 $tbtext = "";
 930                 while ($o = $dbr->fetchObject($tbs)) {
 931                         $rmvtxt = "";
 932                         if ($wgUser->isAllowed( 'trackback' )) {
 933                                 $delurl = $this->mTitle->getFullURL("action=deletetrackback&tbid="
 934                                                 . $o->tb_id . "&token=" . $wgUser->editToken());
 935                                 $rmvtxt = wfMsg('trackbackremove', $delurl);
 936                         }
 937                         $tbtext .= wfMsg(strlen($o->tb_ex) ? 'trackbackexcerpt' : 'trackback',
 938                                         $o->tb_title,
 939                                         $o->tb_url,
 940                                         $o->tb_ex,
 941                                         $o->tb_name,
 942                                         $rmvtxt);
 943                 }
 944                 $wgOut->addWikitext(wfMsg('trackbackbox', $tbtext));
 945         }
 946
 947         function deletetrackback() {
 948                 global $wgUser, $wgRequest, $wgOut, $wgTitle;
 949
 950                 if (!$wgUser->matchEditToken($wgRequest->getVal('token'))) {
 951                         $wgOut->addWikitext(wfMsg('sessionfailure'));
 952                         return;
 953                 }
 954
 955                 if ((!$wgUser->isAllowed('delete'))) {
 956                         $wgOut->sysopRequired();
 957                         return;
 958                 }
 959
 960                 if (wfReadOnly()) {
 961                         $wgOut->readOnlyPage();
 962                         return;
 963                 }
 964
 965                 $db =& wfGetDB(DB_MASTER);
 966                 $db->delete('trackbacks', array('tb_id' => $wgRequest->getInt('tbid')));
 967                 $wgTitle->invalidateCache();
 968                 $wgOut->addWikiText(wfMsg('trackbackdeleteok'));
 969         }
 970
 971         function render() {
 972                 global $wgOut;
 973
 974                 $wgOut->setArticleBodyOnly(true);
 975                 $this->view();
 976         }
 977
 978         /**
 979          * Handle action=purge
 980          */
 981         function purge() {
 982                 global $wgUser, $wgRequest, $wgOut;
 983
 984                 if ( $wgUser->isLoggedIn() || $wgRequest->wasPosted() ) {
 985                         if( wfRunHooks( 'ArticlePurge', array( &$this ) ) ) {
 986                                 $this->doPurge();
 987                         }
 988                 } else {
 989                         $msg = $wgOut->parse( wfMsg( 'confirm_purge' ) );
 990                         $action = $this->mTitle->escapeLocalURL( 'action=purge' );
 991                         $button = htmlspecialchars( wfMsg( 'confirm_purge_button' ) );
 992                         $msg = str_replace( '$1',
 993                                 "<form method=\"post\" action=\"$action\">\n" .
 994                                 "<input type=\"submit\" name=\"submit\" value=\"$button\" />\n" .
 995                                 "</form>\n", $msg );
 996
 997                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 998                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
 999                         $wgOut->addHTML( $msg );
1000                 }
1001         }
1002
1003         /**
1004          * Perform the actions of a page purging
1005          */
1006         function doPurge() {
1007                 global $wgUseSquid;
1008                 // Invalidate the cache
1009                 $this->mTitle->invalidateCache();
1010
1011                 if ( $wgUseSquid ) {
1012                         // Commit the transaction before the purge is sent
1013                         $dbw = wfGetDB( DB_MASTER );
1014                         $dbw->immediateCommit();
1015
1016                         // Send purge
1017                         $update = SquidUpdate::newSimplePurge( $this->mTitle );
1018                         $update->doUpdate();
1019                 }
1020                 $this->view();
1021         }
1022
1023         /**
1024          * Insert a new empty page record for this article.
1025          * This *must* be followed up by creating a revision
1026          * and running $this->updateToLatest( $rev_id );
1027          * or else the record will be left in a funky state.
1028          * Best if all done inside a transaction.
1029          *
1030          * @param Database $dbw
1031          * @param string   $restrictions
1032          * @return int     The newly created page_id key
1033          * @private
1034          */
1035         function insertOn( &$dbw, $restrictions = '' ) {
1036                 $fname = 'Article::insertOn';
1037                 wfProfileIn( $fname );
1038
1039                 $page_id = $dbw->nextSequenceValue( 'page_page_id_seq' );
1040                 $dbw->insert( 'page', array(
1041                         'page_id'           => $page_id,
1042                         'page_namespace'    => $this->mTitle->getNamespace(),
1043                         'page_title'        => $this->mTitle->getDBkey(),
1044                         'page_counter'      => 0,
1045                         'page_restrictions' => $restrictions,
1046                         'page_is_redirect'  => 0, # Will set this shortly...
1047                         'page_is_new'       => 1,
1048                         'page_random'       => wfRandom(),
1049                         'page_touched'      => $dbw->timestamp(),
1050                         'page_latest'       => 0, # Fill this in shortly...
1051                         'page_len'          => 0, # Fill this in shortly...
1052                 ), $fname );
1053                 $newid = $dbw->insertId();
1054
1055                 $this->mTitle->resetArticleId( $newid );
1056
1057                 wfProfileOut( $fname );
1058                 return $newid;
1059         }
1060
1061         /**
1062          * Update the page record to point to a newly saved revision.
1063          *
1064          * @param Database $dbw
1065          * @param Revision $revision For ID number, and text used to set
1066                                      length and redirect status fields
1067          * @param int $lastRevision If given, will not overwrite the page field
1068          *                          when different from the currently set value.
1069          *                          Giving 0 indicates the new page flag should
1070          *                          be set on.
1071          * @return bool true on success, false on failure
1072          * @private
1073          */
1074         function updateRevisionOn( &$dbw, $revision, $lastRevision = null ) {
1075                 $fname = 'Article::updateToRevision';
1076                 wfProfileIn( $fname );
1077
1078                 $conditions = array( 'page_id' => $this->getId() );
1079                 if( !is_null( $lastRevision ) ) {
1080                         # An extra check against threads stepping on each other
1081                         $conditions['page_latest'] = $lastRevision;
1082                 }
1083
1084                 $text = $revision->getText();
1085                 $dbw->update( 'page',
1086                         array( /* SET */
1087                                 'page_latest'      => $revision->getId(),
1088                                 'page_touched'     => $dbw->timestamp(),
1089                                 'page_is_new'      => ($lastRevision === 0) ? 1 : 0,
1090                                 'page_is_redirect' => Article::isRedirect( $text ) ? 1 : 0,
1091                                 'page_len'         => strlen( $text ),
1092                         ),
1093                         $conditions,
1094                         $fname );
1095
1096                 wfProfileOut( $fname );
1097                 return ( $dbw->affectedRows() != 0 );
1098         }
1099
1100         /**
1101          * If the given revision is newer than the currently set page_latest,
1102          * update the page record. Otherwise, do nothing.
1103          *
1104          * @param Database $dbw
1105          * @param Revision $revision
1106          */
1107         function updateIfNewerOn( &$dbw, $revision ) {
1108                 $fname = 'Article::updateIfNewerOn';
1109                 wfProfileIn( $fname );
1110
1111                 $row = $dbw->selectRow(
1112                         array( 'revision', 'page' ),
1113                         array( 'rev_id', 'rev_timestamp' ),
1114                         array(
1115                                 'page_id' => $this->getId(),
1116                                 'page_latest=rev_id' ),
1117                         $fname );
1118                 if( $row ) {
1119                         if( wfTimestamp(TS_MW, $row->rev_timestamp) >= $revision->getTimestamp() ) {
1120                                 wfProfileOut( $fname );
1121                                 return false;
1122                         }
1123                         $prev = $row->rev_id;
1124                 } else {
1125                         # No or missing previous revision; mark the page as new
1126                         $prev = 0;
1127                 }
1128
1129                 $ret = $this->updateRevisionOn( $dbw, $revision, $prev );
1130                 wfProfileOut( $fname );
1131                 return $ret;
1132         }
1133
1134         /**
1135          * Insert a new article into the database
1136          * @private
1137          */
1138         function insertNewArticle( $text, $summary, $isminor, $watchthis, $suppressRC=false, $comment=false ) {
1139                 global $wgUser;
1140
1141                 $fname = 'Article::insertNewArticle';
1142                 wfProfileIn( $fname );
1143
1144                 if( !wfRunHooks( 'ArticleSave', array( &$this, &$wgUser, &$text,
1145                         &$summary, &$isminor, &$watchthis, NULL ) ) ) {
1146                         wfDebug( "$fname: ArticleSave hook aborted save!\n" );
1147                         wfProfileOut( $fname );
1148                         return false;
1149                 }
1150
1151                 $ns = $this->mTitle->getNamespace();
1152                 $ttl = $this->mTitle->getDBkey();
1153
1154                 # If this is a comment, add the summary as headline
1155                 if($comment && $summary!="") {
1156                         $text="== {$summary} ==\n\n".$text;
1157                 }
1158                 $text = $this->preSaveTransform( $text );
1159
1160
1161                 # Set statistics members
1162                 # We work out if it's countable after PST to avoid counter drift
1163                 # when articles are created with {{subst:}}
1164                 $this->mGoodAdjustment = (int)$this->isCountable( $text );
1165                 $this->mTotalAdjustment = 1;
1166
1167                 /* Silently ignore minoredit if not allowed */
1168                 $isminor = $isminor && $wgUser->isAllowed('minoredit');
1169                 $now = wfTimestampNow();
1170
1171                 $dbw =& wfGetDB( DB_MASTER );
1172
1173                 # Add the page record; stake our claim on this title!
1174                 $newid = $this->insertOn( $dbw );
1175
1176                 # Save the revision text...
1177                 $revision = new Revision( array(
1178                         'page'       => $newid,
1179                         'comment'    => $summary,
1180                         'minor_edit' => $isminor,
1181                         'text'       => $text
1182                         ) );
1183                 $revisionId = $revision->insertOn( $dbw );
1184
1185                 $this->mTitle->resetArticleID( $newid );
1186
1187                 # Update the page record with revision data
1188                 $this->updateRevisionOn( $dbw, $revision, 0 );
1189
1190                 Article::onArticleCreate( $this->mTitle );
1191                 if(!$suppressRC) {
1192                         require_once( 'RecentChange.php' );
1193                         $rcid = RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary, 'default',
1194                           '', strlen( $text ), $revisionId );
1195                         # Mark as patrolled if the user can and has the option set
1196                         if( $wgUser->isAllowed( 'patrol' ) && $wgUser->getOption( 'autopatrol' ) ) {
1197                                 RecentChange::markPatrolled( $rcid );
1198                         }
1199                 }
1200
1201                 if ($watchthis) {
1202                         if(!$this->mTitle->userIsWatching()) $this->doWatch();
1203                 } else {
1204                         if ( $this->mTitle->userIsWatching() ) {
1205                                 $this->doUnwatch();
1206                         }
1207                 }
1208
1209                 # The talk page isn't in the regular link tables, so we need to update manually:
1210                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
1211                 $dbw->update( 'page',
1212                         array( 'page_touched' => $dbw->timestamp($now) ),
1213                         array( 'page_namespace' => $talkns,
1214                                'page_title' => $ttl ),
1215                         $fname );
1216
1217                 # standard deferred updates
1218                 $this->editUpdates( $text, $summary, $isminor, $now, $revisionId );
1219
1220                 $oldid = 0; # new article
1221                 $this->showArticle( $text, wfMsg( 'newarticle' ), false, $isminor, $now, $summary, $oldid );
1222
1223                 wfRunHooks( 'ArticleInsertComplete', array( &$this, &$wgUser, $text,
1224                         $summary, $isminor,
1225                         $watchthis, NULL ) );
1226                 wfRunHooks( 'ArticleSaveComplete', array( &$this, &$wgUser, $text,
1227                         $summary, $isminor,
1228                         $watchthis, NULL ) );
1229                 wfProfileOut( $fname );
1230         }
1231
1232         /**
1233          * @return string Complete article text, or null if error
1234          */
1235         function replaceSection($section, $text, $summary = '', $edittime = NULL) {
1236                 $fname = 'Article::replaceSection';
1237                 wfProfileIn( $fname );
1238
1239                 if( $section == '' ) {
1240                         // Whole-page edit; let the text through unmolested.
1241                 } else {
1242                         if( is_null( $edittime ) ) {
1243                                 $rev = Revision::newFromTitle( $this->mTitle );
1244                         } else {
1245                                 $dbw =& wfGetDB( DB_MASTER );
1246                                 $rev = Revision::loadFromTimestamp( $dbw, $this->mTitle, $edittime );
1247                         }
1248                         if( is_null( $rev ) ) {
1249                                 wfDebug( "Article::replaceSection asked for bogus section (page: " .
1250                                         $this->getId() . "; section: $section; edittime: $edittime)\n" );
1251                                 return null;
1252                         }
1253                         $oldtext = $rev->getText();
1254
1255                         if($section=='new') {
1256                                 if($summary) $subject="== {$summary} ==\n\n";
1257                                 $text=$oldtext."\n\n".$subject.$text;
1258                         } else {
1259                                 global $wgParser;
1260                                 $text = $wgParser->replaceSection( $oldtext, $section, $text );
1261                         }
1262                 }
1263
1264                 wfProfileOut( $fname );
1265                 return $text;
1266         }
1267
1268         /**
1269          * Change an existing article. Puts the previous version back into the old table, updates RC
1270          * and all necessary caches, mostly via the deferred update array.
1271          *
1272          * It is possible to call this function from a command-line script, but note that you should
1273          * first set $wgUser, and clean up $wgDeferredUpdates after each edit.
1274          */
1275         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
1276                 global $wgUser, $wgDBtransactions, $wgUseSquid;
1277                 global $wgPostCommitUpdateList, $wgUseFileCache;
1278
1279                 $fname = 'Article::updateArticle';
1280                 wfProfileIn( $fname );
1281                 $good = true;
1282
1283                 if( !wfRunHooks( 'ArticleSave', array( &$this, &$wgUser, &$text,
1284                         &$summary, &$minor,
1285                         &$watchthis, &$sectionanchor ) ) ) {
1286                         wfDebug( "$fname: ArticleSave hook aborted save!\n" );
1287                         wfProfileOut( $fname );
1288                         return false;
1289                 }
1290
1291                 $isminor = $minor && $wgUser->isAllowed('minoredit');
1292
1293                 $text = $this->preSaveTransform( $text );
1294                 $dbw =& wfGetDB( DB_MASTER );
1295                 $now = wfTimestampNow();
1296
1297                 # Update article, but only if changed.
1298
1299                 # It's important that we either rollback or complete, otherwise an attacker could
1300                 # overwrite cur entries by sending precisely timed user aborts. Random bored users
1301                 # could conceivably have the same effect, especially if cur is locked for long periods.
1302                 if( !$wgDBtransactions ) {
1303                         $userAbort = ignore_user_abort( true );
1304                 }
1305
1306                 $oldtext = $this->getContent();
1307                 $oldsize = strlen( $oldtext );
1308                 $newsize = strlen( $text );
1309                 $lastRevision = 0;
1310                 $revisionId = 0;
1311
1312                 if ( 0 != strcmp( $text, $oldtext ) ) {
1313                         $this->mGoodAdjustment = (int)$this->isCountable( $text )
1314                           - (int)$this->isCountable( $oldtext );
1315                         $this->mTotalAdjustment = 0;
1316                         $now = wfTimestampNow();
1317
1318                         $lastRevision = $dbw->selectField(
1319                                 'page', 'page_latest', array( 'page_id' => $this->getId() ) );
1320
1321                         $revision = new Revision( array(
1322                                 'page'       => $this->getId(),
1323                                 'comment'    => $summary,
1324                                 'minor_edit' => $isminor,
1325                                 'text'       => $text
1326                                 ) );
1327
1328                         $dbw->immediateCommit();
1329                         $dbw->begin();
1330                         $revisionId = $revision->insertOn( $dbw );
1331
1332                         # Update page
1333                         $ok = $this->updateRevisionOn( $dbw, $revision, $lastRevision );
1334
1335                         if( !$ok ) {
1336                                 /* Belated edit conflict! Run away!! */
1337                                 $good = false;
1338                                 $dbw->rollback();
1339                         } else {
1340                                 # Update recentchanges and purge cache and whatnot
1341                                 require_once( 'RecentChange.php' );
1342                                 $bot = (int)($wgUser->isBot() || $forceBot);
1343                                 $rcid = RecentChange::notifyEdit( $now, $this->mTitle, $isminor, $wgUser, $summary,
1344                                         $lastRevision, $this->getTimestamp(), $bot, '', $oldsize, $newsize,
1345                                         $revisionId );
1346
1347                                 # Mark as patrolled if the user can do so and has it set in their options
1348                                 if( $wgUser->isAllowed( 'patrol' ) && $wgUser->getOption( 'autopatrol' ) ) {
1349                                         RecentChange::markPatrolled( $rcid );
1350                                 }
1351
1352                                 $dbw->commit();
1353
1354                                 // Update caches outside the main transaction
1355                                 Article::onArticleEdit( $this->mTitle );
1356                         }
1357                 } else {
1358                         // Keep the same revision ID, but do some updates on it
1359                         $revisionId = $this->getRevIdFetched();
1360                 }
1361
1362                 if( !$wgDBtransactions ) {
1363                         ignore_user_abort( $userAbort );
1364                 }
1365
1366                 if ( $good ) {
1367                         if ($watchthis) {
1368                                 if (!$this->mTitle->userIsWatching()) {
1369                                         $dbw->immediateCommit();
1370                                         $dbw->begin();
1371                                         $this->doWatch();
1372                                         $dbw->commit();
1373                                 }
1374                         } else {
1375                                 if ( $this->mTitle->userIsWatching() ) {
1376                                         $dbw->immediateCommit();
1377                                         $dbw->begin();
1378                                         $this->doUnwatch();
1379                                         $dbw->commit();
1380                                 }
1381                         }
1382                         # standard deferred updates
1383                         $this->editUpdates( $text, $summary, $minor, $now, $revisionId );
1384
1385
1386                         $urls = array();
1387                         # Invalidate caches of all articles using this article as a template
1388
1389                         # Template namespace
1390                         # Purge all articles linking here
1391                         $titles = $this->mTitle->getTemplateLinksTo();
1392                         Title::touchArray( $titles );
1393                         if ( $wgUseSquid ) {
1394                                         foreach ( $titles as $title ) {
1395                                                 $urls[] = $title->getInternalURL();
1396                                         }
1397                         }
1398
1399                         # Squid updates
1400                         if ( $wgUseSquid ) {
1401                                 $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
1402                                 $u = new SquidUpdate( $urls );
1403                                 array_push( $wgPostCommitUpdateList, $u );
1404                         }
1405
1406                         # File cache
1407                         if ( $wgUseFileCache ) {
1408                                 $cm = new CacheManager($this->mTitle);
1409                                 @unlink($cm->fileCacheName());
1410                         }
1411
1412                         $this->showArticle( $text, wfMsg( 'updated' ), $sectionanchor, $isminor, $now, $summary, $lastRevision );
1413                 }
1414                 wfRunHooks( 'ArticleSaveComplete',
1415                         array( &$this, &$wgUser, $text,
1416                         $summary, $minor,
1417                         $watchthis, $sectionanchor ) );
1418                 wfProfileOut( $fname );
1419                 return $good;
1420         }
1421
1422         /**
1423          * After we've either updated or inserted the article, update
1424          * the link tables and redirect to the new page.
1425          * @todo FIXME some function arguments never used
1426          */
1427         function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid ) {
1428                 global $wgOut;
1429
1430                 $fname = 'Article::showArticle';
1431                 wfProfileIn( $fname );
1432
1433                 # Output the redirect
1434                 if( $this->isRedirect( $text ) )
1435                         $r = 'redirect=no';
1436                 else
1437                         $r = '';
1438                 $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
1439
1440                 wfProfileOut( $fname );
1441         }
1442
1443         /**
1444          * Mark this particular edit as patrolled
1445          */
1446         function markpatrolled() {
1447                 global $wgOut, $wgRequest, $wgUseRCPatrol, $wgUser;
1448                 $wgOut->setRobotpolicy( 'noindex,follow' );
1449
1450                 # Check RC patrol config. option
1451                 if( !$wgUseRCPatrol ) {
1452                         $wgOut->errorPage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1453                         return;
1454                 }
1455
1456                 # Check permissions
1457                 if( !$wgUser->isAllowed( 'patrol' ) ) {
1458                         $wgOut->permissionRequired( 'patrol' );
1459                         return;
1460                 }
1461
1462                 $rcid = $wgRequest->getVal( 'rcid' );
1463                 if ( !is_null ( $rcid ) ) {
1464                         if( wfRunHooks( 'MarkPatrolled', array( &$rcid, &$wgUser, false ) ) ) {
1465                                 require_once( 'RecentChange.php' );
1466                                 RecentChange::markPatrolled( $rcid );
1467                                 wfRunHooks( 'MarkPatrolledComplete', array( &$rcid, &$wgUser, false ) );
1468                                 $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
1469                                 $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
1470                         }
1471                         $rcTitle = Title::makeTitle( NS_SPECIAL, 'Recentchanges' );
1472                         $wgOut->returnToMain( false, $rcTitle->getPrefixedText() );
1473                 }
1474                 else {
1475                         $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1476                 }
1477         }
1478
1479         /**
1480          * User-interface handler for the "watch" action
1481          */
1482
1483         function watch() {
1484
1485                 global $wgUser, $wgOut;
1486
1487                 if ( $wgUser->isAnon() ) {
1488                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1489                         return;
1490                 }
1491                 if ( wfReadOnly() ) {
1492                         $wgOut->readOnlyPage();
1493                         return;
1494                 }
1495
1496                 if( $this->doWatch() ) {
1497                         $wgOut->setPagetitle( wfMsg( 'addedwatch' ) );
1498                         $wgOut->setRobotpolicy( 'noindex,follow' );
1499
1500                         $link = $this->mTitle->getPrefixedText();
1501                         $text = wfMsg( 'addedwatchtext', $link );
1502                         $wgOut->addWikiText( $text );
1503                 }
1504
1505                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1506         }
1507
1508         /**
1509          * Add this page to $wgUser's watchlist
1510          * @return bool true on successful watch operation
1511          */
1512         function doWatch() {
1513                 global $wgUser;
1514                 if( $wgUser->isAnon() ) {
1515                         return false;
1516                 }
1517
1518                 if (wfRunHooks('WatchArticle', array(&$wgUser, &$this))) {
1519                         $wgUser->addWatch( $this->mTitle );
1520                         $wgUser->saveSettings();
1521
1522                         return wfRunHooks('WatchArticleComplete', array(&$wgUser, &$this));
1523                 }
1524
1525                 return false;
1526         }
1527
1528         /**
1529          * User interface handler for the "unwatch" action.
1530          */
1531         function unwatch() {
1532
1533                 global $wgUser, $wgOut;
1534
1535                 if ( $wgUser->isAnon() ) {
1536                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1537                         return;
1538                 }
1539                 if ( wfReadOnly() ) {
1540                         $wgOut->readOnlyPage();
1541                         return;
1542                 }
1543
1544                 if( $this->doUnwatch() ) {
1545                         $wgOut->setPagetitle( wfMsg( 'removedwatch' ) );
1546                         $wgOut->setRobotpolicy( 'noindex,follow' );
1547
1548                         $link = $this->mTitle->getPrefixedText();
1549                         $text = wfMsg( 'removedwatchtext', $link );
1550                         $wgOut->addWikiText( $text );
1551                 }
1552
1553                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1554         }
1555
1556         /**
1557          * Stop watching a page
1558          * @return bool true on successful unwatch
1559          */
1560         function doUnwatch() {
1561                 global $wgUser;
1562                 if( $wgUser->isAnon() ) {
1563                         return false;
1564                 }
1565
1566                 if (wfRunHooks('UnwatchArticle', array(&$wgUser, &$this))) {
1567                         $wgUser->removeWatch( $this->mTitle );
1568                         $wgUser->saveSettings();
1569
1570                         return wfRunHooks('UnwatchArticleComplete', array(&$wgUser, &$this));
1571                 }
1572
1573                 return false;
1574         }
1575
1576         /**
1577          * action=protect handler
1578          */
1579         function protect() {
1580                 require_once 'ProtectionForm.php';
1581                 $form = new ProtectionForm( $this );
1582                 $form->show();
1583         }
1584
1585         /**
1586          * action=unprotect handler (alias)
1587          */
1588         function unprotect() {
1589                 $this->protect();
1590         }
1591
1592         /**
1593          * Update the article's restriction field, and leave a log entry.
1594          *
1595          * @param array $limit set of restriction keys
1596          * @param string $reason
1597          * @return bool true on success
1598          */
1599         function updateRestrictions( $limit = array(), $reason = '' ) {
1600                 global $wgUser, $wgRestrictionTypes, $wgContLang;
1601
1602                 $id = $this->mTitle->getArticleID();
1603                 if( !$wgUser->isAllowed( 'protect' ) || wfReadOnly() || $id == 0 ) {
1604                         return false;
1605                 }
1606
1607                 # FIXME: Same limitations as described in ProtectionForm.php (line 37);
1608                 # we expect a single selection, but the schema allows otherwise.
1609                 $current = array();
1610                 foreach( $wgRestrictionTypes as $action )
1611                         $current[$action] = implode( '', $this->mTitle->getRestrictions( $action ) );
1612
1613                 $current = Article::flattenRestrictions( $current );
1614                 $updated = Article::flattenRestrictions( $limit );
1615
1616                 $changed = ( $current != $updated );
1617                 $protect = ( $updated != '' );
1618
1619                 # If nothing's changed, do nothing
1620                 if( $changed ) {
1621                         if( wfRunHooks( 'ArticleProtect', array( &$this, &$wgUser, $limit, $reason ) ) ) {
1622
1623                                 $dbw =& wfGetDB( DB_MASTER );
1624
1625                                 # Prepare a null revision to be added to the history
1626                                 $comment = $wgContLang->ucfirst( wfMsgForContent( $protect ? 'protectedarticle' : 'unprotectedarticle', $this->mTitle->getPrefixedText() ) );
1627                                 if( $reason )
1628                                         $comment .= ": $reason";
1629                                 if( $protect )
1630                                         $comment .= " [$updated]";
1631                                 $nullRevision = Revision::newNullRevision( $dbw, $id, $comment, true );
1632                                 $nullRevId = $nullRevision->insertOn( $dbw );
1633
1634                                 # Update page record
1635                                 $dbw->update( 'page',
1636                                         array( /* SET */
1637                                                 'page_touched' => $dbw->timestamp(),
1638                                                 'page_restrictions' => $updated,
1639                                                 'page_latest' => $nullRevId
1640                                         ), array( /* WHERE */
1641                                                 'page_id' => $id
1642                                         ), 'Article::protect'
1643                                 );
1644                                 wfRunHooks( 'ArticleProtectComplete', array( &$this, &$wgUser, $limit, $reason ) );
1645
1646                                 # Update the protection log
1647                                 $log = new LogPage( 'protect' );
1648                                 if( $protect ) {
1649                                         $log->addEntry( 'protect', $this->mTitle, trim( $reason . " [$updated]" ) );
1650                                 } else {
1651                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1652                                 }
1653
1654                         } # End hook
1655                 } # End "changed" check
1656
1657                 return true;
1658         }
1659
1660         /**
1661          * Take an array of page restrictions and flatten it to a string
1662          * suitable for insertion into the page_restrictions field.
1663          * @param array $limit
1664          * @return string
1665          * @private
1666          */
1667         function flattenRestrictions( $limit ) {
1668                 if( !is_array( $limit ) ) {
1669                         wfDebugDieBacktrace( 'Article::flattenRestrictions given non-array restriction set' );
1670                 }
1671                 $bits = array();
1672                 ksort( $limit );
1673                 foreach( $limit as $action => $restrictions ) {
1674                         if( $restrictions != '' ) {
1675                                 $bits[] = "$action=$restrictions";
1676                         }
1677                 }
1678                 return implode( ':', $bits );
1679         }
1680
1681         /*
1682          * UI entry point for page deletion
1683          */
1684         function delete() {
1685                 global $wgUser, $wgOut, $wgRequest;
1686                 $fname = 'Article::delete';
1687                 $confirm = $wgRequest->wasPosted() &&
1688                         $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
1689                 $reason = $wgRequest->getText( 'wpReason' );
1690
1691                 # This code desperately needs to be totally rewritten
1692
1693                 # Check permissions
1694                 if( $wgUser->isAllowed( 'delete' ) ) {
1695                         if( $wgUser->isBlocked() ) {
1696                                 $wgOut->blockedPage();
1697                                 return;
1698                         }
1699                 } else {
1700                         $wgOut->permissionRequired( 'delete' );
1701                         return;
1702                 }
1703
1704                 if( wfReadOnly() ) {
1705                         $wgOut->readOnlyPage();
1706                         return;
1707                 }
1708
1709                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1710
1711                 # Better double-check that it hasn't been deleted yet!
1712                 $dbw =& wfGetDB( DB_MASTER );
1713                 $conds = $this->mTitle->pageCond();
1714                 $latest = $dbw->selectField( 'page', 'page_latest', $conds, $fname );
1715                 if ( $latest === false ) {
1716                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1717                         return;
1718                 }
1719
1720                 if( $confirm ) {
1721                         $this->doDelete( $reason );
1722                         return;
1723                 }
1724
1725                 # determine whether this page has earlier revisions
1726                 # and insert a warning if it does
1727                 $maxRevisions = 20;
1728                 $authors = $this->getLastNAuthors( $maxRevisions, $latest );
1729
1730                 if( count( $authors ) > 1 && !$confirm ) {
1731                         $skin=$wgUser->getSkin();
1732                         $wgOut->addHTML( '<strong>' . wfMsg( 'historywarning' ) . ' ' . $skin->historyLink() . '</strong>' );
1733                 }
1734
1735                 # If a single user is responsible for all revisions, find out who they are
1736                 if ( count( $authors ) == $maxRevisions ) {
1737                         // Query bailed out, too many revisions to find out if they're all the same
1738                         $authorOfAll = false;
1739                 } else {
1740                         $authorOfAll = reset( $authors );
1741                         foreach ( $authors as $author ) {
1742                                 if ( $authorOfAll != $author ) {
1743                                         $authorOfAll = false;
1744                                         break;
1745                                 }
1746                         }
1747                 }
1748                 # Fetch article text
1749                 $rev = Revision::newFromTitle( $this->mTitle );
1750
1751                 if( !is_null( $rev ) ) {
1752                         # if this is a mini-text, we can paste part of it into the deletion reason
1753                         $text = $rev->getText();
1754
1755                         #if this is empty, an earlier revision may contain "useful" text
1756                         $blanked = false;
1757                         if( $text == '' ) {
1758                                 $prev = $rev->getPrevious();
1759                                 if( $prev ) {
1760                                         $text = $prev->getText();
1761                                         $blanked = true;
1762                                 }
1763                         }
1764
1765                         $length = strlen( $text );
1766
1767                         # this should not happen, since it is not possible to store an empty, new
1768                         # page. Let's insert a standard text in case it does, though
1769                         if( $length == 0 && $reason === '' ) {
1770                                 $reason = wfMsgForContent( 'exblank' );
1771                         }
1772
1773                         if( $length < 500 && $reason === '' ) {
1774                                 # comment field=255, let's grep the first 150 to have some user
1775                                 # space left
1776                                 global $wgContLang;
1777                                 $text = $wgContLang->truncate( $text, 150, '...' );
1778
1779                                 # let's strip out newlines
1780                                 $text = preg_replace( "/[\n\r]/", '', $text );
1781
1782                                 if( !$blanked ) {
1783                                         if( $authorOfAll === false ) {
1784                                                 $reason = wfMsgForContent( 'excontent', $text );
1785                                         } else {
1786                                                 $reason = wfMsgForContent( 'excontentauthor', $text, $authorOfAll );
1787                                         }
1788                                 } else {
1789                                         $reason = wfMsgForContent( 'exbeforeblank', $text );
1790                                 }
1791                         }
1792                 }
1793
1794                 return $this->confirmDelete( '', $reason );
1795         }
1796
1797         /**
1798          * Get the last N authors
1799          * @param int $num Number of revisions to get
1800          * @param string $revLatest The latest rev_id, selected from the master (optional)
1801          * @return array Array of authors, duplicates not removed
1802          */
1803         function getLastNAuthors( $num, $revLatest = 0 ) {
1804                 $fname = 'Article::getLastNAuthors';
1805                 wfProfileIn( $fname );
1806
1807                 // First try the slave
1808                 // If that doesn't have the latest revision, try the master
1809                 $continue = 2;
1810                 $db =& wfGetDB( DB_SLAVE );
1811                 do {
1812                         $res = $db->select( array( 'page', 'revision' ),
1813                                 array( 'rev_id', 'rev_user_text' ),
1814                                 array(
1815                                         'page_namespace' => $this->mTitle->getNamespace(),
1816                                         'page_title' => $this->mTitle->getDBkey(),
1817                                         'rev_page = page_id'
1818                                 ), $fname, $this->getSelectOptions( array(
1819                                         'ORDER BY' => 'rev_timestamp DESC',
1820                                         'LIMIT' => $num
1821                                 ) )
1822                         );
1823                         if ( !$res ) {
1824                                 wfProfileOut( $fname );
1825                                 return array();
1826                         }
1827                         $row = $db->fetchObject( $res );
1828                         if ( $continue == 2 && $revLatest && $row->rev_id != $revLatest ) {
1829                                 $db =& wfGetDB( DB_MASTER );
1830                                 $continue--;
1831                         } else {
1832                                 $continue = 0;
1833                         }
1834                 } while ( $continue );
1835
1836                 $authors = array( $row->rev_user_text );
1837                 while ( $row = $db->fetchObject( $res ) ) {
1838                         $authors[] = $row->rev_user_text;
1839                 }
1840                 wfProfileOut( $fname );
1841                 return $authors;
1842         }
1843
1844         /**
1845          * Output deletion confirmation dialog
1846          */
1847         function confirmDelete( $par, $reason ) {
1848                 global $wgOut, $wgUser;
1849
1850                 wfDebug( "Article::confirmDelete\n" );
1851
1852                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1853                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1854                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1855                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1856
1857                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1858
1859                 $confirm = htmlspecialchars( wfMsg( 'deletepage' ) );
1860                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1861                 $token = htmlspecialchars( $wgUser->editToken() );
1862
1863                 $wgOut->addHTML( "
1864 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1865         <table border='0'>
1866                 <tr>
1867                         <td align='right'>
1868                                 <label for='wpReason'>{$delcom}:</label>
1869                         </td>
1870                         <td align='left'>
1871                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1872                         </td>
1873                 </tr>
1874                 <tr>
1875                         <td>&nbsp;</td>
1876                         <td>
1877                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1878                         </td>
1879                 </tr>
1880         </table>
1881         <input type='hidden' name='wpEditToken' value=\"{$token}\" />
1882 </form>\n" );
1883
1884                 $wgOut->returnToMain( false );
1885         }
1886
1887
1888         /**
1889          * Perform a deletion and output success or failure messages
1890          */
1891         function doDelete( $reason ) {
1892                 global $wgOut, $wgUser;
1893                 $fname = 'Article::doDelete';
1894                 wfDebug( $fname."\n" );
1895
1896                 if (wfRunHooks('ArticleDelete', array(&$this, &$wgUser, &$reason))) {
1897                         if ( $this->doDeleteArticle( $reason ) ) {
1898                                 $deleted = $this->mTitle->getPrefixedText();
1899
1900                                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1901                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1902
1903                                 $loglink = '[[Special:Log/delete|' . wfMsg( 'deletionlog' ) . ']]';
1904                                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
1905
1906                                 $wgOut->addWikiText( $text );
1907                                 $wgOut->returnToMain( false );
1908                                 wfRunHooks('ArticleDeleteComplete', array(&$this, &$wgUser, $reason));
1909                         } else {
1910                                 $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1911                         }
1912                 }
1913         }
1914
1915         /**
1916          * Back-end article deletion
1917          * Deletes the article with database consistency, writes logs, purges caches
1918          * Returns success
1919          */
1920         function doDeleteArticle( $reason ) {
1921                 global $wgUseSquid, $wgDeferredUpdateList;
1922                 global $wgPostCommitUpdateList, $wgUseTrackbacks;
1923
1924                 $fname = 'Article::doDeleteArticle';
1925                 wfDebug( $fname."\n" );
1926
1927                 $dbw =& wfGetDB( DB_MASTER );
1928                 $ns = $this->mTitle->getNamespace();
1929                 $t = $this->mTitle->getDBkey();
1930                 $id = $this->mTitle->getArticleID();
1931
1932                 if ( $t == '' || $id == 0 ) {
1933                         return false;
1934                 }
1935
1936                 $u = new SiteStatsUpdate( 0, 1, -(int)$this->isCountable( $this->getContent() ), -1 );
1937                 array_push( $wgDeferredUpdateList, $u );
1938
1939                 $linksTo = $this->mTitle->getLinksTo();
1940
1941                 # Squid purging
1942                 if ( $wgUseSquid ) {
1943                         $urls = array(
1944                                 $this->mTitle->getInternalURL(),
1945                                 $this->mTitle->getInternalURL( 'history' )
1946                         );
1947
1948                         $u = SquidUpdate::newFromTitles( $linksTo, $urls );
1949                         array_push( $wgPostCommitUpdateList, $u );
1950
1951                 }
1952
1953                 # Client and file cache invalidation
1954                 Title::touchArray( $linksTo );
1955
1956
1957                 // For now, shunt the revision data into the archive table.
1958                 // Text is *not* removed from the text table; bulk storage
1959                 // is left intact to avoid breaking block-compression or
1960                 // immutable storage schemes.
1961                 //
1962                 // For backwards compatibility, note that some older archive
1963                 // table entries will have ar_text and ar_flags fields still.
1964                 //
1965                 // In the future, we may keep revisions and mark them with
1966                 // the rev_deleted field, which is reserved for this purpose.
1967                 $dbw->insertSelect( 'archive', array( 'page', 'revision' ),
1968                         array(
1969                                 'ar_namespace'  => 'page_namespace',
1970                                 'ar_title'      => 'page_title',
1971                                 'ar_comment'    => 'rev_comment',
1972                                 'ar_user'       => 'rev_user',
1973                                 'ar_user_text'  => 'rev_user_text',
1974                                 'ar_timestamp'  => 'rev_timestamp',
1975                                 'ar_minor_edit' => 'rev_minor_edit',
1976                                 'ar_rev_id'     => 'rev_id',
1977                                 'ar_text_id'    => 'rev_text_id',
1978                         ), array(
1979                                 'page_id' => $id,
1980                                 'page_id = rev_page'
1981                         ), $fname
1982                 );
1983
1984                 # Now that it's safely backed up, delete it
1985                 $dbw->delete( 'revision', array( 'rev_page' => $id ), $fname );
1986                 $dbw->delete( 'page', array( 'page_id' => $id ), $fname);
1987
1988                 if ($wgUseTrackbacks)
1989                         $dbw->delete( 'trackbacks', array( 'tb_page' => $id ), $fname );
1990
1991                 # Clean up recentchanges entries...
1992                 $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), $fname );
1993
1994                 # Finally, clean up the link tables
1995                 $t = $this->mTitle->getPrefixedDBkey();
1996
1997                 Article::onArticleDelete( $this->mTitle );
1998
1999                 # Delete outgoing links
2000                 $dbw->delete( 'pagelinks', array( 'pl_from' => $id ) );
2001                 $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
2002                 $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
2003                 $dbw->delete( 'templatelinks', array( 'tl_from' => $id ) );
2004                 $dbw->delete( 'externallinks', array( 'el_from' => $id ) );
2005                 $dbw->delete( 'langlinks', array( 'll_from' => $id ) );
2006
2007                 # Log the deletion
2008                 $log = new LogPage( 'delete' );
2009                 $log->addEntry( 'delete', $this->mTitle, $reason );
2010
2011                 # Clear the cached article id so the interface doesn't act like we exist
2012                 $this->mTitle->resetArticleID( 0 );
2013                 $this->mTitle->mArticleID = 0;
2014                 return true;
2015         }
2016
2017         /**
2018          * Revert a modification
2019          */
2020         function rollback() {
2021                 global $wgUser, $wgOut, $wgRequest, $wgUseRCPatrol;
2022                 $fname = 'Article::rollback';
2023
2024                 if( $wgUser->isAllowed( 'rollback' ) ) {
2025                         if( $wgUser->isBlocked() ) {
2026                                 $wgOut->blockedPage();
2027                                 return;
2028                         }
2029                 } else {
2030                         $wgOut->permissionRequired( 'rollback' );
2031                         return;
2032                 }
2033
2034                 if ( wfReadOnly() ) {
2035                         $wgOut->readOnlyPage( $this->getContent() );
2036                         return;
2037                 }
2038                 if( !$wgUser->matchEditToken( $wgRequest->getVal( 'token' ),
2039                         array( $this->mTitle->getPrefixedText(),
2040                                 $wgRequest->getVal( 'from' ) )  ) ) {
2041                         $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
2042                         $wgOut->addWikiText( wfMsg( 'sessionfailure' ) );
2043                         return;
2044                 }
2045                 $dbw =& wfGetDB( DB_MASTER );
2046
2047                 # Enhanced rollback, marks edits rc_bot=1
2048                 $bot = $wgRequest->getBool( 'bot' );
2049
2050                 # Replace all this user's current edits with the next one down
2051                 $tt = $this->mTitle->getDBKey();
2052                 $n = $this->mTitle->getNamespace();
2053
2054                 # Get the last editor, lock table exclusively
2055                 $dbw->begin();
2056                 $current = Revision::newFromTitle( $this->mTitle );
2057                 if( is_null( $current ) ) {
2058                         # Something wrong... no page?
2059                         $dbw->rollback();
2060                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
2061                         return;
2062                 }
2063
2064                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
2065                 if( $from != $current->getUserText() ) {
2066                         $wgOut->setPageTitle( wfMsg('rollbackfailed') );
2067                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
2068                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
2069                                 htmlspecialchars( $from ),
2070                                 htmlspecialchars( $current->getUserText() ) ) );
2071                         if( $current->getComment() != '') {
2072                                 $wgOut->addHTML(
2073                                         wfMsg( 'editcomment',
2074                                         htmlspecialchars( $current->getComment() ) ) );
2075                         }
2076                         return;
2077                 }
2078
2079                 # Get the last edit not by this guy
2080                 $user = intval( $current->getUser() );
2081                 $user_text = $dbw->addQuotes( $current->getUserText() );
2082                 $s = $dbw->selectRow( 'revision',
2083                         array( 'rev_id', 'rev_timestamp' ),
2084                         array(
2085                                 'rev_page' => $current->getPage(),
2086                                 "rev_user <> {$user} OR rev_user_text <> {$user_text}"
2087                         ), $fname,
2088                         array(
2089                                 'USE INDEX' => 'page_timestamp',
2090                                 'ORDER BY'  => 'rev_timestamp DESC' )
2091                         );
2092                 if( $s === false ) {
2093                         # Something wrong
2094                         $dbw->rollback();
2095                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
2096                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
2097                         return;
2098                 }
2099
2100                 $set = array();
2101                 if ( $bot ) {
2102                         # Mark all reverted edits as bot
2103                         $set['rc_bot'] = 1;
2104                 }
2105                 if ( $wgUseRCPatrol ) {
2106                         # Mark all reverted edits as patrolled
2107                         $set['rc_patrolled'] = 1;
2108                 }
2109
2110                 if ( $set ) {
2111                         $dbw->update( 'recentchanges', $set,
2112                                 array( /* WHERE */
2113                                         'rc_cur_id'    => $current->getPage(),
2114                                         'rc_user_text' => $current->getUserText(),
2115                                         "rc_timestamp > '{$s->rev_timestamp}'",
2116                                 ), $fname
2117                         );
2118                 }
2119
2120                 # Get the edit summary
2121                 $target = Revision::newFromId( $s->rev_id );
2122                 $newComment = wfMsgForContent( 'revertpage', $target->getUserText(), $from );
2123                 $newComment = $wgRequest->getText( 'summary', $newComment );
2124
2125                 # Save it!
2126                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
2127                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
2128                 $wgOut->addHTML( '<h2>' . htmlspecialchars( $newComment ) . "</h2>\n<hr />\n" );
2129
2130                 $this->updateArticle( $target->getText(), $newComment, 1, $this->mTitle->userIsWatching(), $bot );
2131                 Article::onArticleEdit( $this->mTitle );
2132
2133                 $dbw->commit();
2134                 $wgOut->returnToMain( false );
2135         }
2136
2137
2138         /**
2139          * Do standard deferred updates after page view
2140          * @private
2141          */
2142         function viewUpdates() {
2143                 global $wgDeferredUpdateList;
2144
2145                 if ( 0 != $this->getID() ) {
2146                         global $wgDisableCounters;
2147                         if( !$wgDisableCounters ) {
2148                                 Article::incViewCount( $this->getID() );
2149                                 $u = new SiteStatsUpdate( 1, 0, 0 );
2150                                 array_push( $wgDeferredUpdateList, $u );
2151                         }
2152                 }
2153
2154                 # Update newtalk / watchlist notification status
2155                 global $wgUser;
2156                 $wgUser->clearNotification( $this->mTitle );
2157         }
2158
2159         /**
2160          * Do standard deferred updates after page edit.
2161          * Every 1000th edit, prune the recent changes table.
2162          * @private
2163          * @param string $text
2164          */
2165         function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange, $newid) {
2166                 global $wgDeferredUpdateList, $wgMessageCache, $wgUser, $wgParser;
2167
2168                 $fname = 'Article::editUpdates';
2169                 wfProfileIn( $fname );
2170
2171                 # Parse the text
2172                 $options = new ParserOptions;
2173                 $options->setTidy(true);
2174                 $poutput = $wgParser->parse( $text, $this->mTitle, $options, true, true, $newid );
2175
2176                 # Save it to the parser cache
2177                 $parserCache =& ParserCache::singleton();
2178                 $parserCache->save( $poutput, $this, $wgUser );
2179
2180                 # Update the links tables
2181                 $u = new LinksUpdate( $this->mTitle, $poutput );
2182                 $u->doUpdate();
2183
2184                 if ( wfRunHooks( 'ArticleEditUpdatesDeleteFromRecentchanges', array( &$this ) ) ) {
2185                         wfSeedRandom();
2186                         if ( 0 == mt_rand( 0, 999 ) ) {
2187                                 # Periodically flush old entries from the recentchanges table.
2188                                 global $wgRCMaxAge;
2189
2190                                 $dbw =& wfGetDB( DB_MASTER );
2191                                 $cutoff = $dbw->timestamp( time() - $wgRCMaxAge );
2192                                 $recentchanges = $dbw->tableName( 'recentchanges' );
2193                                 $sql = "DELETE FROM $recentchanges WHERE rc_timestamp < '{$cutoff}'";
2194                                 $dbw->query( $sql );
2195                         }
2196                 }
2197
2198                 $id = $this->getID();
2199                 $title = $this->mTitle->getPrefixedDBkey();
2200                 $shortTitle = $this->mTitle->getDBkey();
2201
2202                 if ( 0 == $id ) {
2203                         wfProfileOut( $fname );
2204                         return;
2205                 }
2206
2207                 $u = new SiteStatsUpdate( 0, 1, $this->mGoodAdjustment, $this->mTotalAdjustment );
2208                 array_push( $wgDeferredUpdateList, $u );
2209                 $u = new SearchUpdate( $id, $title, $text );
2210                 array_push( $wgDeferredUpdateList, $u );
2211
2212                 # If this is another user's talk page, update newtalk
2213
2214                 if ($this->mTitle->getNamespace() == NS_USER_TALK && $shortTitle != $wgUser->getName()) {
2215                         if (wfRunHooks('ArticleEditUpdateNewTalk', array(&$this)) ) {
2216                                 $other = User::newFromName( $shortTitle );
2217                                 if( is_null( $other ) && User::isIP( $shortTitle ) ) {
2218                                         // An anonymous user
2219                                         $other = new User();
2220                                         $other->setName( $shortTitle );
2221                                 }
2222                                 if( $other ) {
2223                                         $other->setNewtalk( true );
2224                                 }
2225                         }
2226                 }
2227
2228                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
2229                         $wgMessageCache->replace( $shortTitle, $text );
2230                 }
2231
2232                 wfProfileOut( $fname );
2233         }
2234
2235         /**
2236          * Generate the navigation links when browsing through an article revisions
2237          * It shows the information as:
2238          *   Revision as of \<date\>; view current revision
2239          *   \<- Previous version | Next Version -\>
2240          *
2241          * @private
2242          * @param string $oldid         Revision ID of this article revision
2243          */
2244         function setOldSubtitle( $oldid=0 ) {
2245                 global $wgLang, $wgOut, $wgUser;
2246
2247                 $current = ( $oldid == $this->mLatest );
2248                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
2249                 $sk = $wgUser->getSkin();
2250                 $lnk = $current
2251                         ? wfMsg( 'currentrevisionlink' )
2252                         : $lnk = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
2253                 $prev = $this->mTitle->getPreviousRevisionID( $oldid ) ;
2254                 $prevlink = $prev
2255                         ? $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid )
2256                         : wfMsg( 'previousrevision' );
2257                 $nextlink = $current
2258                         ? wfMsg( 'nextrevision' )
2259                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
2260                 $r = wfMsg( 'revisionasofwithlink', $td, $lnk, $prevlink, $nextlink );
2261                 $wgOut->setSubtitle( $r );
2262         }
2263
2264         /**
2265          * This function is called right before saving the wikitext,
2266          * so we can do things like signatures and links-in-context.
2267          *
2268          * @param string $text
2269          */
2270         function preSaveTransform( $text ) {
2271                 global $wgParser, $wgUser;
2272                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
2273         }
2274
2275         /* Caching functions */
2276
2277         /**
2278          * checkLastModified returns true if it has taken care of all
2279          * output to the client that is necessary for this request.
2280          * (that is, it has sent a cached version of the page)
2281          */
2282         function tryFileCache() {
2283                 static $called = false;
2284                 if( $called ) {
2285                         wfDebug( " tryFileCache() -- called twice!?\n" );
2286                         return;
2287                 }
2288                 $called = true;
2289                 if($this->isFileCacheable()) {
2290                         $touched = $this->mTouched;
2291                         $cache = new CacheManager( $this->mTitle );
2292                         if($cache->isFileCacheGood( $touched )) {
2293                                 wfDebug( " tryFileCache() - about to load\n" );
2294                                 $cache->loadFromFileCache();
2295                                 return true;
2296                         } else {
2297                                 wfDebug( " tryFileCache() - starting buffer\n" );
2298                                 ob_start( array(&$cache, 'saveToFileCache' ) );
2299                         }
2300                 } else {
2301                         wfDebug( " tryFileCache() - not cacheable\n" );
2302                 }
2303         }
2304
2305         /**
2306          * Check if the page can be cached
2307          * @return bool
2308          */
2309         function isFileCacheable() {
2310                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
2311                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
2312
2313                 return $wgUseFileCache
2314                         and (!$wgShowIPinHeader)
2315                         and ($this->getID() != 0)
2316                         and ($wgUser->isAnon())
2317                         and (!$wgUser->getNewtalk())
2318                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
2319                         and (empty( $action ) || $action == 'view')
2320                         and (!isset($oldid))
2321                         and (!isset($diff))
2322                         and (!isset($redirect))
2323                         and (!isset($printable))
2324                         and (!$this->mRedirectedFrom);
2325         }
2326
2327         /**
2328          * Loads page_touched and returns a value indicating if it should be used
2329          *
2330          */
2331         function checkTouched() {
2332                 $fname = 'Article::checkTouched';
2333                 if( !$this->mDataLoaded ) {
2334                         $this->loadPageData();
2335                 }
2336                 return !$this->mIsRedirect;
2337         }
2338
2339         /**
2340          * Get the page_touched field
2341          */
2342         function getTouched() {
2343                 # Ensure that page data has been loaded
2344                 if( !$this->mDataLoaded ) {
2345                         $this->loadPageData();
2346                 }
2347                 return $this->mTouched;
2348         }
2349
2350         /**
2351          * Get the page_latest field
2352          */
2353         function getLatest() {
2354                 if ( !$this->mDataLoaded ) {
2355                         $this->loadPageData();
2356                 }
2357                 return $this->mLatest;
2358         }
2359
2360         /**
2361          * Edit an article without doing all that other stuff
2362          * The article must already exist; link tables etc
2363          * are not updated, caches are not flushed.
2364          *
2365          * @param string $text text submitted
2366          * @param string $comment comment submitted
2367          * @param bool $minor whereas it's a minor modification
2368          */
2369         function quickEdit( $text, $comment = '', $minor = 0 ) {
2370                 $fname = 'Article::quickEdit';
2371                 wfProfileIn( $fname );
2372
2373                 $dbw =& wfGetDB( DB_MASTER );
2374                 $dbw->begin();
2375                 $revision = new Revision( array(
2376                         'page'       => $this->getId(),
2377                         'text'       => $text,
2378                         'comment'    => $comment,
2379                         'minor_edit' => $minor ? 1 : 0,
2380                         ) );
2381                 # fixme : $revisionId never used
2382                 $revisionId = $revision->insertOn( $dbw );
2383                 $this->updateRevisionOn( $dbw, $revision );
2384                 $dbw->commit();
2385
2386                 wfProfileOut( $fname );
2387         }
2388
2389         /**
2390          * Used to increment the view counter
2391          *
2392          * @static
2393          * @param integer $id article id
2394          */
2395         function incViewCount( $id ) {
2396                 $id = intval( $id );
2397                 global $wgHitcounterUpdateFreq, $wgDBtype;
2398
2399                 $dbw =& wfGetDB( DB_MASTER );
2400                 $pageTable = $dbw->tableName( 'page' );
2401                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
2402                 $acchitsTable = $dbw->tableName( 'acchits' );
2403
2404                 if( $wgHitcounterUpdateFreq <= 1 ){ //
2405                         $dbw->query( "UPDATE $pageTable SET page_counter = page_counter + 1 WHERE page_id = $id" );
2406                         return;
2407                 }
2408
2409                 # Not important enough to warrant an error page in case of failure
2410                 $oldignore = $dbw->ignoreErrors( true );
2411
2412                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2413
2414                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2415                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2416                         # Most of the time (or on SQL errors), skip row count check
2417                         $dbw->ignoreErrors( $oldignore );
2418                         return;
2419                 }
2420
2421                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2422                 $row = $dbw->fetchObject( $res );
2423                 $rown = intval( $row->n );
2424                 if( $rown >= $wgHitcounterUpdateFreq ){
2425                         wfProfileIn( 'Article::incViewCount-collect' );
2426                         $old_user_abort = ignore_user_abort( true );
2427
2428                         if ($wgDBtype == 'mysql')
2429                                 $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2430                         $tabletype = $wgDBtype == 'mysql' ? "ENGINE=HEAP " : '';
2431                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable $tabletype".
2432                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2433                                 'GROUP BY hc_id');
2434                         $dbw->query("DELETE FROM $hitcounterTable");
2435                         if ($wgDBtype == 'mysql')
2436                                 $dbw->query('UNLOCK TABLES');
2437                         $dbw->query("UPDATE $pageTable,$acchitsTable SET page_counter=page_counter + hc_n ".
2438                                 'WHERE page_id = hc_id');
2439                         $dbw->query("DROP TABLE $acchitsTable");
2440
2441                         ignore_user_abort( $old_user_abort );
2442                         wfProfileOut( 'Article::incViewCount-collect' );
2443                 }
2444                 $dbw->ignoreErrors( $oldignore );
2445         }
2446
2447         /**#@+
2448          * The onArticle*() functions are supposed to be a kind of hooks
2449          * which should be called whenever any of the specified actions
2450          * are done.
2451          *
2452          * This is a good place to put code to clear caches, for instance.
2453          *
2454          * This is called on page move and undelete, as well as edit
2455          * @static
2456          * @param $title_obj a title object
2457          */
2458
2459         function onArticleCreate($title_obj) {
2460                 global $wgUseSquid, $wgPostCommitUpdateList;
2461
2462                 $title_obj->touchLinks();
2463                 $titles = $title_obj->getLinksTo();
2464
2465                 # Purge squid
2466                 if ( $wgUseSquid ) {
2467                         $urls = $title_obj->getSquidURLs();
2468                         foreach ( $titles as $linkTitle ) {
2469                                 $urls[] = $linkTitle->getInternalURL();
2470                         }
2471                         $u = new SquidUpdate( $urls );
2472                         array_push( $wgPostCommitUpdateList, $u );
2473                 }
2474         }
2475
2476         function onArticleDelete( $title ) {
2477                 global $wgMessageCache;
2478
2479                 $title->touchLinks();
2480
2481                 if( $title->getNamespace() == NS_MEDIAWIKI) {
2482                         $wgMessageCache->replace( $title->getDBkey(), false );
2483                 }
2484         }
2485
2486         /**
2487          * Purge caches on page update etc
2488          */
2489         function onArticleEdit( $title ) {
2490                 global $wgUseSquid, $wgPostCommitUpdateList, $wgUseFileCache;
2491
2492                 $urls = array();
2493
2494                 // Template namespace? Purge all articles linking here.
2495                 // FIXME: When a templatelinks table arrives, use it for all includes.
2496                 if ( $title->getNamespace() == NS_TEMPLATE) {
2497                         $titles = $title->getLinksTo();
2498                         Title::touchArray( $titles );
2499                         if ( $wgUseSquid ) {
2500                                 foreach ( $titles as $link ) {
2501                                         $urls[] = $link->getInternalURL();
2502                                 }
2503                         }
2504                 }
2505
2506                 # Squid updates
2507                 if ( $wgUseSquid ) {
2508                         $urls = array_merge( $urls, $title->getSquidURLs() );
2509                         $u = new SquidUpdate( $urls );
2510                         array_push( $wgPostCommitUpdateList, $u );
2511                 }
2512
2513                 # File cache
2514                 if ( $wgUseFileCache ) {
2515                         $cm = new CacheManager( $title );
2516                         @unlink( $cm->fileCacheName() );
2517                 }
2518         }
2519
2520         /**#@-*/
2521
2522         /**
2523          * Info about this page
2524          * Called for ?action=info when $wgAllowPageInfo is on.
2525          *
2526          * @public
2527          */
2528         function info() {
2529                 global $wgLang, $wgOut, $wgAllowPageInfo, $wgUser;
2530                 $fname = 'Article::info';
2531
2532                 if ( !$wgAllowPageInfo ) {
2533                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
2534                         return;
2535                 }
2536
2537                 $page = $this->mTitle->getSubjectPage();
2538
2539                 $wgOut->setPagetitle( $page->getPrefixedText() );
2540                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
2541
2542                 # first, see if the page exists at all.
2543                 $exists = $page->getArticleId() != 0;
2544                 if( !$exists ) {
2545                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
2546                                 $wgOut->addHTML(wfMsgWeirdKey ( $this->mTitle->getText() ) );
2547                         } else {
2548                                 $wgOut->addHTML(wfMsg( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon' ) );
2549                         }
2550                 } else {
2551                         $dbr =& wfGetDB( DB_SLAVE );
2552                         $wl_clause = array(
2553                                 'wl_title'     => $page->getDBkey(),
2554                                 'wl_namespace' => $page->getNamespace() );
2555                         $numwatchers = $dbr->selectField(
2556                                 'watchlist',
2557                                 'COUNT(*)',
2558                                 $wl_clause,
2559                                 $fname,
2560                                 $this->getSelectOptions() );
2561
2562                         $pageInfo = $this->pageCountInfo( $page );
2563                         $talkInfo = $this->pageCountInfo( $page->getTalkPage() );
2564
2565                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $wgLang->formatNum( $numwatchers ) ) . '</li>' );
2566                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $wgLang->formatNum( $pageInfo['edits'] ) ) . '</li>');
2567                         if( $talkInfo ) {
2568                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $wgLang->formatNum( $talkInfo['edits'] ) ) . '</li>');
2569                         }
2570                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $wgLang->formatNum( $pageInfo['authors'] ) ) . '</li>' );
2571                         if( $talkInfo ) {
2572                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $wgLang->formatNum( $talkInfo['authors'] ) ) . '</li>' );
2573                         }
2574                         $wgOut->addHTML( '</ul>' );
2575
2576                 }
2577         }
2578
2579         /**
2580          * Return the total number of edits and number of unique editors
2581          * on a given page. If page does not exist, returns false.
2582          *
2583          * @param Title $title
2584          * @return array
2585          * @private
2586          */
2587         function pageCountInfo( $title ) {
2588                 $id = $title->getArticleId();
2589                 if( $id == 0 ) {
2590                         return false;
2591                 }
2592
2593                 $dbr =& wfGetDB( DB_SLAVE );
2594
2595                 $rev_clause = array( 'rev_page' => $id );
2596                 $fname = 'Article::pageCountInfo';
2597
2598                 $edits = $dbr->selectField(
2599                         'revision',
2600                         'COUNT(rev_page)',
2601                         $rev_clause,
2602                         $fname,
2603                         $this->getSelectOptions() );
2604
2605                 $authors = $dbr->selectField(
2606                         'revision',
2607                         'COUNT(DISTINCT rev_user_text)',
2608                         $rev_clause,
2609                         $fname,
2610                         $this->getSelectOptions() );
2611
2612                 return array( 'edits' => $edits, 'authors' => $authors );
2613         }
2614
2615         /**
2616          * Return a list of templates used by this article.
2617          * Uses the templatelinks table
2618          *
2619          * @return array Array of Title objects
2620          */
2621         function getUsedTemplates() {
2622                 $result = array();
2623                 $id = $this->mTitle->getArticleID();
2624                 if( $id == 0 ) {
2625                         return array();
2626                 }
2627
2628                 $dbr =& wfGetDB( DB_SLAVE );
2629                 $res = $dbr->select( array( 'templatelinks' ),
2630                         array( 'tl_namespace', 'tl_title' ),
2631                         array( 'tl_from' => $id ),
2632                         'Article:getUsedTemplates' );
2633                 if ( false !== $res ) {
2634                         if ( $dbr->numRows( $res ) ) {
2635                                 while ( $row = $dbr->fetchObject( $res ) ) {
2636                                         $result[] = Title::makeTitle( $row->tl_namespace, $row->tl_title );
2637                                 }
2638                         }
2639                 }
2640                 $dbr->freeResult( $res );
2641                 return $result;
2642         }
2643 }
2644
2645 ?>