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                         $rcid = RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary, 'default',
1193                           '', strlen( $text ), $revisionId );
1194                         # Mark as patrolled if the user can and has the option set
1195                         if( $wgUser->isAllowed( 'patrol' ) && $wgUser->getOption( 'autopatrol' ) ) {
1196                                 RecentChange::markPatrolled( $rcid );
1197                         }
1198                 }
1199
1200                 if ($watchthis) {
1201                         if(!$this->mTitle->userIsWatching()) $this->doWatch();
1202                 } else {
1203                         if ( $this->mTitle->userIsWatching() ) {
1204                                 $this->doUnwatch();
1205                         }
1206                 }
1207
1208                 # The talk page isn't in the regular link tables, so we need to update manually:
1209                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
1210                 $dbw->update( 'page',
1211                         array( 'page_touched' => $dbw->timestamp($now) ),
1212                         array( 'page_namespace' => $talkns,
1213                                'page_title' => $ttl ),
1214                         $fname );
1215
1216                 # standard deferred updates
1217                 $this->editUpdates( $text, $summary, $isminor, $now, $revisionId );
1218
1219                 $oldid = 0; # new article
1220                 $this->showArticle( $text, wfMsg( 'newarticle' ), false, $isminor, $now, $summary, $oldid );
1221
1222                 wfRunHooks( 'ArticleInsertComplete', array( &$this, &$wgUser, $text,
1223                         $summary, $isminor,
1224                         $watchthis, NULL ) );
1225                 wfRunHooks( 'ArticleSaveComplete', array( &$this, &$wgUser, $text,
1226                         $summary, $isminor,
1227                         $watchthis, NULL ) );
1228                 wfProfileOut( $fname );
1229         }
1230
1231         /**
1232          * @return string Complete article text, or null if error
1233          */
1234         function replaceSection($section, $text, $summary = '', $edittime = NULL) {
1235                 $fname = 'Article::replaceSection';
1236                 wfProfileIn( $fname );
1237
1238                 if( $section == '' ) {
1239                         // Whole-page edit; let the text through unmolested.
1240                 } else {
1241                         if( is_null( $edittime ) ) {
1242                                 $rev = Revision::newFromTitle( $this->mTitle );
1243                         } else {
1244                                 $dbw =& wfGetDB( DB_MASTER );
1245                                 $rev = Revision::loadFromTimestamp( $dbw, $this->mTitle, $edittime );
1246                         }
1247                         if( is_null( $rev ) ) {
1248                                 wfDebug( "Article::replaceSection asked for bogus section (page: " .
1249                                         $this->getId() . "; section: $section; edittime: $edittime)\n" );
1250                                 return null;
1251                         }
1252                         $oldtext = $rev->getText();
1253
1254                         if($section=='new') {
1255                                 if($summary) $subject="== {$summary} ==\n\n";
1256                                 $text=$oldtext."\n\n".$subject.$text;
1257                         } else {
1258                                 global $wgParser;
1259                                 $text = $wgParser->replaceSection( $oldtext, $section, $text );
1260                         }
1261                 }
1262
1263                 wfProfileOut( $fname );
1264                 return $text;
1265         }
1266
1267         /**
1268          * Change an existing article. Puts the previous version back into the old table, updates RC
1269          * and all necessary caches, mostly via the deferred update array.
1270          *
1271          * It is possible to call this function from a command-line script, but note that you should
1272          * first set $wgUser, and clean up $wgDeferredUpdates after each edit.
1273          */
1274         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
1275                 global $wgUser, $wgDBtransactions, $wgUseSquid;
1276                 global $wgPostCommitUpdateList, $wgUseFileCache;
1277
1278                 $fname = 'Article::updateArticle';
1279                 wfProfileIn( $fname );
1280                 $good = true;
1281
1282                 if( !wfRunHooks( 'ArticleSave', array( &$this, &$wgUser, &$text,
1283                         &$summary, &$minor,
1284                         &$watchthis, &$sectionanchor ) ) ) {
1285                         wfDebug( "$fname: ArticleSave hook aborted save!\n" );
1286                         wfProfileOut( $fname );
1287                         return false;
1288                 }
1289
1290                 $isminor = $minor && $wgUser->isAllowed('minoredit');
1291
1292                 $text = $this->preSaveTransform( $text );
1293                 $dbw =& wfGetDB( DB_MASTER );
1294                 $now = wfTimestampNow();
1295
1296                 # Update article, but only if changed.
1297
1298                 # It's important that we either rollback or complete, otherwise an attacker could
1299                 # overwrite cur entries by sending precisely timed user aborts. Random bored users
1300                 # could conceivably have the same effect, especially if cur is locked for long periods.
1301                 if( !$wgDBtransactions ) {
1302                         $userAbort = ignore_user_abort( true );
1303                 }
1304
1305                 $oldtext = $this->getContent();
1306                 $oldsize = strlen( $oldtext );
1307                 $newsize = strlen( $text );
1308                 $lastRevision = 0;
1309                 $revisionId = 0;
1310
1311                 if ( 0 != strcmp( $text, $oldtext ) ) {
1312                         $this->mGoodAdjustment = (int)$this->isCountable( $text )
1313                           - (int)$this->isCountable( $oldtext );
1314                         $this->mTotalAdjustment = 0;
1315                         $now = wfTimestampNow();
1316
1317                         $lastRevision = $dbw->selectField(
1318                                 'page', 'page_latest', array( 'page_id' => $this->getId() ) );
1319
1320                         $revision = new Revision( array(
1321                                 'page'       => $this->getId(),
1322                                 'comment'    => $summary,
1323                                 'minor_edit' => $isminor,
1324                                 'text'       => $text
1325                                 ) );
1326
1327                         $dbw->immediateCommit();
1328                         $dbw->begin();
1329                         $revisionId = $revision->insertOn( $dbw );
1330
1331                         # Update page
1332                         $ok = $this->updateRevisionOn( $dbw, $revision, $lastRevision );
1333
1334                         if( !$ok ) {
1335                                 /* Belated edit conflict! Run away!! */
1336                                 $good = false;
1337                                 $dbw->rollback();
1338                         } else {
1339                                 # Update recentchanges and purge cache and whatnot
1340                                 $bot = (int)($wgUser->isBot() || $forceBot);
1341                                 $rcid = RecentChange::notifyEdit( $now, $this->mTitle, $isminor, $wgUser, $summary,
1342                                         $lastRevision, $this->getTimestamp(), $bot, '', $oldsize, $newsize,
1343                                         $revisionId );
1344
1345                                 # Mark as patrolled if the user can do so and has it set in their options
1346                                 if( $wgUser->isAllowed( 'patrol' ) && $wgUser->getOption( 'autopatrol' ) ) {
1347                                         RecentChange::markPatrolled( $rcid );
1348                                 }
1349
1350                                 $dbw->commit();
1351
1352                                 // Update caches outside the main transaction
1353                                 Article::onArticleEdit( $this->mTitle );
1354                         }
1355                 } else {
1356                         // Keep the same revision ID, but do some updates on it
1357                         $revisionId = $this->getRevIdFetched();
1358                 }
1359
1360                 if( !$wgDBtransactions ) {
1361                         ignore_user_abort( $userAbort );
1362                 }
1363
1364                 if ( $good ) {
1365                         if ($watchthis) {
1366                                 if (!$this->mTitle->userIsWatching()) {
1367                                         $dbw->immediateCommit();
1368                                         $dbw->begin();
1369                                         $this->doWatch();
1370                                         $dbw->commit();
1371                                 }
1372                         } else {
1373                                 if ( $this->mTitle->userIsWatching() ) {
1374                                         $dbw->immediateCommit();
1375                                         $dbw->begin();
1376                                         $this->doUnwatch();
1377                                         $dbw->commit();
1378                                 }
1379                         }
1380                         # standard deferred updates
1381                         $this->editUpdates( $text, $summary, $minor, $now, $revisionId );
1382
1383
1384                         $urls = array();
1385                         # Invalidate caches of all articles using this article as a template
1386
1387                         # Template namespace
1388                         # Purge all articles linking here
1389                         $titles = $this->mTitle->getTemplateLinksTo();
1390                         Title::touchArray( $titles );
1391                         if ( $wgUseSquid ) {
1392                                         foreach ( $titles as $title ) {
1393                                                 $urls[] = $title->getInternalURL();
1394                                         }
1395                         }
1396
1397                         # Squid updates
1398                         if ( $wgUseSquid ) {
1399                                 $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
1400                                 $u = new SquidUpdate( $urls );
1401                                 array_push( $wgPostCommitUpdateList, $u );
1402                         }
1403
1404                         # File cache
1405                         if ( $wgUseFileCache ) {
1406                                 $cm = new CacheManager($this->mTitle);
1407                                 @unlink($cm->fileCacheName());
1408                         }
1409
1410                         $this->showArticle( $text, wfMsg( 'updated' ), $sectionanchor, $isminor, $now, $summary, $lastRevision );
1411                 }
1412                 wfRunHooks( 'ArticleSaveComplete',
1413                         array( &$this, &$wgUser, $text,
1414                         $summary, $minor,
1415                         $watchthis, $sectionanchor ) );
1416                 wfProfileOut( $fname );
1417                 return $good;
1418         }
1419
1420         /**
1421          * After we've either updated or inserted the article, update
1422          * the link tables and redirect to the new page.
1423          * @todo FIXME some function arguments never used
1424          */
1425         function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid ) {
1426                 global $wgOut;
1427
1428                 $fname = 'Article::showArticle';
1429                 wfProfileIn( $fname );
1430
1431                 # Output the redirect
1432                 if( $this->isRedirect( $text ) )
1433                         $r = 'redirect=no';
1434                 else
1435                         $r = '';
1436                 $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
1437
1438                 wfProfileOut( $fname );
1439         }
1440
1441         /**
1442          * Mark this particular edit as patrolled
1443          */
1444         function markpatrolled() {
1445                 global $wgOut, $wgRequest, $wgUseRCPatrol, $wgUser;
1446                 $wgOut->setRobotpolicy( 'noindex,follow' );
1447
1448                 # Check RC patrol config. option
1449                 if( !$wgUseRCPatrol ) {
1450                         $wgOut->errorPage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1451                         return;
1452                 }
1453
1454                 # Check permissions
1455                 if( !$wgUser->isAllowed( 'patrol' ) ) {
1456                         $wgOut->permissionRequired( 'patrol' );
1457                         return;
1458                 }
1459
1460                 $rcid = $wgRequest->getVal( 'rcid' );
1461                 if ( !is_null ( $rcid ) ) {
1462                         if( wfRunHooks( 'MarkPatrolled', array( &$rcid, &$wgUser, false ) ) ) {
1463                                 RecentChange::markPatrolled( $rcid );
1464                                 wfRunHooks( 'MarkPatrolledComplete', array( &$rcid, &$wgUser, false ) );
1465                                 $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
1466                                 $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
1467                         }
1468                         $rcTitle = Title::makeTitle( NS_SPECIAL, 'Recentchanges' );
1469                         $wgOut->returnToMain( false, $rcTitle->getPrefixedText() );
1470                 }
1471                 else {
1472                         $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1473                 }
1474         }
1475
1476         /**
1477          * User-interface handler for the "watch" action
1478          */
1479
1480         function watch() {
1481
1482                 global $wgUser, $wgOut;
1483
1484                 if ( $wgUser->isAnon() ) {
1485                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1486                         return;
1487                 }
1488                 if ( wfReadOnly() ) {
1489                         $wgOut->readOnlyPage();
1490                         return;
1491                 }
1492
1493                 if( $this->doWatch() ) {
1494                         $wgOut->setPagetitle( wfMsg( 'addedwatch' ) );
1495                         $wgOut->setRobotpolicy( 'noindex,follow' );
1496
1497                         $link = $this->mTitle->getPrefixedText();
1498                         $text = wfMsg( 'addedwatchtext', $link );
1499                         $wgOut->addWikiText( $text );
1500                 }
1501
1502                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1503         }
1504
1505         /**
1506          * Add this page to $wgUser's watchlist
1507          * @return bool true on successful watch operation
1508          */
1509         function doWatch() {
1510                 global $wgUser;
1511                 if( $wgUser->isAnon() ) {
1512                         return false;
1513                 }
1514
1515                 if (wfRunHooks('WatchArticle', array(&$wgUser, &$this))) {
1516                         $wgUser->addWatch( $this->mTitle );
1517                         $wgUser->saveSettings();
1518
1519                         return wfRunHooks('WatchArticleComplete', array(&$wgUser, &$this));
1520                 }
1521
1522                 return false;
1523         }
1524
1525         /**
1526          * User interface handler for the "unwatch" action.
1527          */
1528         function unwatch() {
1529
1530                 global $wgUser, $wgOut;
1531
1532                 if ( $wgUser->isAnon() ) {
1533                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1534                         return;
1535                 }
1536                 if ( wfReadOnly() ) {
1537                         $wgOut->readOnlyPage();
1538                         return;
1539                 }
1540
1541                 if( $this->doUnwatch() ) {
1542                         $wgOut->setPagetitle( wfMsg( 'removedwatch' ) );
1543                         $wgOut->setRobotpolicy( 'noindex,follow' );
1544
1545                         $link = $this->mTitle->getPrefixedText();
1546                         $text = wfMsg( 'removedwatchtext', $link );
1547                         $wgOut->addWikiText( $text );
1548                 }
1549
1550                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1551         }
1552
1553         /**
1554          * Stop watching a page
1555          * @return bool true on successful unwatch
1556          */
1557         function doUnwatch() {
1558                 global $wgUser;
1559                 if( $wgUser->isAnon() ) {
1560                         return false;
1561                 }
1562
1563                 if (wfRunHooks('UnwatchArticle', array(&$wgUser, &$this))) {
1564                         $wgUser->removeWatch( $this->mTitle );
1565                         $wgUser->saveSettings();
1566
1567                         return wfRunHooks('UnwatchArticleComplete', array(&$wgUser, &$this));
1568                 }
1569
1570                 return false;
1571         }
1572
1573         /**
1574          * action=protect handler
1575          */
1576         function protect() {
1577                 require_once 'ProtectionForm.php';
1578                 $form = new ProtectionForm( $this );
1579                 $form->show();
1580         }
1581
1582         /**
1583          * action=unprotect handler (alias)
1584          */
1585         function unprotect() {
1586                 $this->protect();
1587         }
1588
1589         /**
1590          * Update the article's restriction field, and leave a log entry.
1591          *
1592          * @param array $limit set of restriction keys
1593          * @param string $reason
1594          * @return bool true on success
1595          */
1596         function updateRestrictions( $limit = array(), $reason = '' ) {
1597                 global $wgUser, $wgRestrictionTypes, $wgContLang;
1598
1599                 $id = $this->mTitle->getArticleID();
1600                 if( !$wgUser->isAllowed( 'protect' ) || wfReadOnly() || $id == 0 ) {
1601                         return false;
1602                 }
1603
1604                 # FIXME: Same limitations as described in ProtectionForm.php (line 37);
1605                 # we expect a single selection, but the schema allows otherwise.
1606                 $current = array();
1607                 foreach( $wgRestrictionTypes as $action )
1608                         $current[$action] = implode( '', $this->mTitle->getRestrictions( $action ) );
1609
1610                 $current = Article::flattenRestrictions( $current );
1611                 $updated = Article::flattenRestrictions( $limit );
1612
1613                 $changed = ( $current != $updated );
1614                 $protect = ( $updated != '' );
1615
1616                 # If nothing's changed, do nothing
1617                 if( $changed ) {
1618                         if( wfRunHooks( 'ArticleProtect', array( &$this, &$wgUser, $limit, $reason ) ) ) {
1619
1620                                 $dbw =& wfGetDB( DB_MASTER );
1621
1622                                 # Prepare a null revision to be added to the history
1623                                 $comment = $wgContLang->ucfirst( wfMsgForContent( $protect ? 'protectedarticle' : 'unprotectedarticle', $this->mTitle->getPrefixedText() ) );
1624                                 if( $reason )
1625                                         $comment .= ": $reason";
1626                                 if( $protect )
1627                                         $comment .= " [$updated]";
1628                                 $nullRevision = Revision::newNullRevision( $dbw, $id, $comment, true );
1629                                 $nullRevId = $nullRevision->insertOn( $dbw );
1630
1631                                 # Update page record
1632                                 $dbw->update( 'page',
1633                                         array( /* SET */
1634                                                 'page_touched' => $dbw->timestamp(),
1635                                                 'page_restrictions' => $updated,
1636                                                 'page_latest' => $nullRevId
1637                                         ), array( /* WHERE */
1638                                                 'page_id' => $id
1639                                         ), 'Article::protect'
1640                                 );
1641                                 wfRunHooks( 'ArticleProtectComplete', array( &$this, &$wgUser, $limit, $reason ) );
1642
1643                                 # Update the protection log
1644                                 $log = new LogPage( 'protect' );
1645                                 if( $protect ) {
1646                                         $log->addEntry( 'protect', $this->mTitle, trim( $reason . " [$updated]" ) );
1647                                 } else {
1648                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1649                                 }
1650
1651                         } # End hook
1652                 } # End "changed" check
1653
1654                 return true;
1655         }
1656
1657         /**
1658          * Take an array of page restrictions and flatten it to a string
1659          * suitable for insertion into the page_restrictions field.
1660          * @param array $limit
1661          * @return string
1662          * @private
1663          */
1664         function flattenRestrictions( $limit ) {
1665                 if( !is_array( $limit ) ) {
1666                         wfDebugDieBacktrace( 'Article::flattenRestrictions given non-array restriction set' );
1667                 }
1668                 $bits = array();
1669                 ksort( $limit );
1670                 foreach( $limit as $action => $restrictions ) {
1671                         if( $restrictions != '' ) {
1672                                 $bits[] = "$action=$restrictions";
1673                         }
1674                 }
1675                 return implode( ':', $bits );
1676         }
1677
1678         /*
1679          * UI entry point for page deletion
1680          */
1681         function delete() {
1682                 global $wgUser, $wgOut, $wgRequest;
1683                 $fname = 'Article::delete';
1684                 $confirm = $wgRequest->wasPosted() &&
1685                         $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
1686                 $reason = $wgRequest->getText( 'wpReason' );
1687
1688                 # This code desperately needs to be totally rewritten
1689
1690                 # Check permissions
1691                 if( $wgUser->isAllowed( 'delete' ) ) {
1692                         if( $wgUser->isBlocked() ) {
1693                                 $wgOut->blockedPage();
1694                                 return;
1695                         }
1696                 } else {
1697                         $wgOut->permissionRequired( 'delete' );
1698                         return;
1699                 }
1700
1701                 if( wfReadOnly() ) {
1702                         $wgOut->readOnlyPage();
1703                         return;
1704                 }
1705
1706                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1707
1708                 # Better double-check that it hasn't been deleted yet!
1709                 $dbw =& wfGetDB( DB_MASTER );
1710                 $conds = $this->mTitle->pageCond();
1711                 $latest = $dbw->selectField( 'page', 'page_latest', $conds, $fname );
1712                 if ( $latest === false ) {
1713                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1714                         return;
1715                 }
1716
1717                 if( $confirm ) {
1718                         $this->doDelete( $reason );
1719                         return;
1720                 }
1721
1722                 # determine whether this page has earlier revisions
1723                 # and insert a warning if it does
1724                 $maxRevisions = 20;
1725                 $authors = $this->getLastNAuthors( $maxRevisions, $latest );
1726
1727                 if( count( $authors ) > 1 && !$confirm ) {
1728                         $skin=$wgUser->getSkin();
1729                         $wgOut->addHTML( '<strong>' . wfMsg( 'historywarning' ) . ' ' . $skin->historyLink() . '</strong>' );
1730                 }
1731
1732                 # If a single user is responsible for all revisions, find out who they are
1733                 if ( count( $authors ) == $maxRevisions ) {
1734                         // Query bailed out, too many revisions to find out if they're all the same
1735                         $authorOfAll = false;
1736                 } else {
1737                         $authorOfAll = reset( $authors );
1738                         foreach ( $authors as $author ) {
1739                                 if ( $authorOfAll != $author ) {
1740                                         $authorOfAll = false;
1741                                         break;
1742                                 }
1743                         }
1744                 }
1745                 # Fetch article text
1746                 $rev = Revision::newFromTitle( $this->mTitle );
1747
1748                 if( !is_null( $rev ) ) {
1749                         # if this is a mini-text, we can paste part of it into the deletion reason
1750                         $text = $rev->getText();
1751
1752                         #if this is empty, an earlier revision may contain "useful" text
1753                         $blanked = false;
1754                         if( $text == '' ) {
1755                                 $prev = $rev->getPrevious();
1756                                 if( $prev ) {
1757                                         $text = $prev->getText();
1758                                         $blanked = true;
1759                                 }
1760                         }
1761
1762                         $length = strlen( $text );
1763
1764                         # this should not happen, since it is not possible to store an empty, new
1765                         # page. Let's insert a standard text in case it does, though
1766                         if( $length == 0 && $reason === '' ) {
1767                                 $reason = wfMsgForContent( 'exblank' );
1768                         }
1769
1770                         if( $length < 500 && $reason === '' ) {
1771                                 # comment field=255, let's grep the first 150 to have some user
1772                                 # space left
1773                                 global $wgContLang;
1774                                 $text = $wgContLang->truncate( $text, 150, '...' );
1775
1776                                 # let's strip out newlines
1777                                 $text = preg_replace( "/[\n\r]/", '', $text );
1778
1779                                 if( !$blanked ) {
1780                                         if( $authorOfAll === false ) {
1781                                                 $reason = wfMsgForContent( 'excontent', $text );
1782                                         } else {
1783                                                 $reason = wfMsgForContent( 'excontentauthor', $text, $authorOfAll );
1784                                         }
1785                                 } else {
1786                                         $reason = wfMsgForContent( 'exbeforeblank', $text );
1787                                 }
1788                         }
1789                 }
1790
1791                 return $this->confirmDelete( '', $reason );
1792         }
1793
1794         /**
1795          * Get the last N authors
1796          * @param int $num Number of revisions to get
1797          * @param string $revLatest The latest rev_id, selected from the master (optional)
1798          * @return array Array of authors, duplicates not removed
1799          */
1800         function getLastNAuthors( $num, $revLatest = 0 ) {
1801                 $fname = 'Article::getLastNAuthors';
1802                 wfProfileIn( $fname );
1803
1804                 // First try the slave
1805                 // If that doesn't have the latest revision, try the master
1806                 $continue = 2;
1807                 $db =& wfGetDB( DB_SLAVE );
1808                 do {
1809                         $res = $db->select( array( 'page', 'revision' ),
1810                                 array( 'rev_id', 'rev_user_text' ),
1811                                 array(
1812                                         'page_namespace' => $this->mTitle->getNamespace(),
1813                                         'page_title' => $this->mTitle->getDBkey(),
1814                                         'rev_page = page_id'
1815                                 ), $fname, $this->getSelectOptions( array(
1816                                         'ORDER BY' => 'rev_timestamp DESC',
1817                                         'LIMIT' => $num
1818                                 ) )
1819                         );
1820                         if ( !$res ) {
1821                                 wfProfileOut( $fname );
1822                                 return array();
1823                         }
1824                         $row = $db->fetchObject( $res );
1825                         if ( $continue == 2 && $revLatest && $row->rev_id != $revLatest ) {
1826                                 $db =& wfGetDB( DB_MASTER );
1827                                 $continue--;
1828                         } else {
1829                                 $continue = 0;
1830                         }
1831                 } while ( $continue );
1832
1833                 $authors = array( $row->rev_user_text );
1834                 while ( $row = $db->fetchObject( $res ) ) {
1835                         $authors[] = $row->rev_user_text;
1836                 }
1837                 wfProfileOut( $fname );
1838                 return $authors;
1839         }
1840
1841         /**
1842          * Output deletion confirmation dialog
1843          */
1844         function confirmDelete( $par, $reason ) {
1845                 global $wgOut, $wgUser;
1846
1847                 wfDebug( "Article::confirmDelete\n" );
1848
1849                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1850                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1851                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1852                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1853
1854                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1855
1856                 $confirm = htmlspecialchars( wfMsg( 'deletepage' ) );
1857                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1858                 $token = htmlspecialchars( $wgUser->editToken() );
1859
1860                 $wgOut->addHTML( "
1861 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1862         <table border='0'>
1863                 <tr>
1864                         <td align='right'>
1865                                 <label for='wpReason'>{$delcom}:</label>
1866                         </td>
1867                         <td align='left'>
1868                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1869                         </td>
1870                 </tr>
1871                 <tr>
1872                         <td>&nbsp;</td>
1873                         <td>
1874                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1875                         </td>
1876                 </tr>
1877         </table>
1878         <input type='hidden' name='wpEditToken' value=\"{$token}\" />
1879 </form>\n" );
1880
1881                 $wgOut->returnToMain( false );
1882         }
1883
1884
1885         /**
1886          * Perform a deletion and output success or failure messages
1887          */
1888         function doDelete( $reason ) {
1889                 global $wgOut, $wgUser;
1890                 $fname = 'Article::doDelete';
1891                 wfDebug( $fname."\n" );
1892
1893                 if (wfRunHooks('ArticleDelete', array(&$this, &$wgUser, &$reason))) {
1894                         if ( $this->doDeleteArticle( $reason ) ) {
1895                                 $deleted = $this->mTitle->getPrefixedText();
1896
1897                                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1898                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1899
1900                                 $loglink = '[[Special:Log/delete|' . wfMsg( 'deletionlog' ) . ']]';
1901                                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
1902
1903                                 $wgOut->addWikiText( $text );
1904                                 $wgOut->returnToMain( false );
1905                                 wfRunHooks('ArticleDeleteComplete', array(&$this, &$wgUser, $reason));
1906                         } else {
1907                                 $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1908                         }
1909                 }
1910         }
1911
1912         /**
1913          * Back-end article deletion
1914          * Deletes the article with database consistency, writes logs, purges caches
1915          * Returns success
1916          */
1917         function doDeleteArticle( $reason ) {
1918                 global $wgUseSquid, $wgDeferredUpdateList;
1919                 global $wgPostCommitUpdateList, $wgUseTrackbacks;
1920
1921                 $fname = 'Article::doDeleteArticle';
1922                 wfDebug( $fname."\n" );
1923
1924                 $dbw =& wfGetDB( DB_MASTER );
1925                 $ns = $this->mTitle->getNamespace();
1926                 $t = $this->mTitle->getDBkey();
1927                 $id = $this->mTitle->getArticleID();
1928
1929                 if ( $t == '' || $id == 0 ) {
1930                         return false;
1931                 }
1932
1933                 $u = new SiteStatsUpdate( 0, 1, -(int)$this->isCountable( $this->getContent() ), -1 );
1934                 array_push( $wgDeferredUpdateList, $u );
1935
1936                 $linksTo = $this->mTitle->getLinksTo();
1937
1938                 # Squid purging
1939                 if ( $wgUseSquid ) {
1940                         $urls = array(
1941                                 $this->mTitle->getInternalURL(),
1942                                 $this->mTitle->getInternalURL( 'history' )
1943                         );
1944
1945                         $u = SquidUpdate::newFromTitles( $linksTo, $urls );
1946                         array_push( $wgPostCommitUpdateList, $u );
1947
1948                 }
1949
1950                 # Client and file cache invalidation
1951                 Title::touchArray( $linksTo );
1952
1953
1954                 // For now, shunt the revision data into the archive table.
1955                 // Text is *not* removed from the text table; bulk storage
1956                 // is left intact to avoid breaking block-compression or
1957                 // immutable storage schemes.
1958                 //
1959                 // For backwards compatibility, note that some older archive
1960                 // table entries will have ar_text and ar_flags fields still.
1961                 //
1962                 // In the future, we may keep revisions and mark them with
1963                 // the rev_deleted field, which is reserved for this purpose.
1964                 $dbw->insertSelect( 'archive', array( 'page', 'revision' ),
1965                         array(
1966                                 'ar_namespace'  => 'page_namespace',
1967                                 'ar_title'      => 'page_title',
1968                                 'ar_comment'    => 'rev_comment',
1969                                 'ar_user'       => 'rev_user',
1970                                 'ar_user_text'  => 'rev_user_text',
1971                                 'ar_timestamp'  => 'rev_timestamp',
1972                                 'ar_minor_edit' => 'rev_minor_edit',
1973                                 'ar_rev_id'     => 'rev_id',
1974                                 'ar_text_id'    => 'rev_text_id',
1975                         ), array(
1976                                 'page_id' => $id,
1977                                 'page_id = rev_page'
1978                         ), $fname
1979                 );
1980
1981                 # Now that it's safely backed up, delete it
1982                 $dbw->delete( 'revision', array( 'rev_page' => $id ), $fname );
1983                 $dbw->delete( 'page', array( 'page_id' => $id ), $fname);
1984
1985                 if ($wgUseTrackbacks)
1986                         $dbw->delete( 'trackbacks', array( 'tb_page' => $id ), $fname );
1987
1988                 # Clean up recentchanges entries...
1989                 $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), $fname );
1990
1991                 # Finally, clean up the link tables
1992                 $t = $this->mTitle->getPrefixedDBkey();
1993
1994                 Article::onArticleDelete( $this->mTitle );
1995
1996                 # Delete outgoing links
1997                 $dbw->delete( 'pagelinks', array( 'pl_from' => $id ) );
1998                 $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
1999                 $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
2000                 $dbw->delete( 'templatelinks', array( 'tl_from' => $id ) );
2001                 $dbw->delete( 'externallinks', array( 'el_from' => $id ) );
2002                 $dbw->delete( 'langlinks', array( 'll_from' => $id ) );
2003
2004                 # Log the deletion
2005                 $log = new LogPage( 'delete' );
2006                 $log->addEntry( 'delete', $this->mTitle, $reason );
2007
2008                 # Clear the cached article id so the interface doesn't act like we exist
2009                 $this->mTitle->resetArticleID( 0 );
2010                 $this->mTitle->mArticleID = 0;
2011                 return true;
2012         }
2013
2014         /**
2015          * Revert a modification
2016          */
2017         function rollback() {
2018                 global $wgUser, $wgOut, $wgRequest, $wgUseRCPatrol;
2019                 $fname = 'Article::rollback';
2020
2021                 if( $wgUser->isAllowed( 'rollback' ) ) {
2022                         if( $wgUser->isBlocked() ) {
2023                                 $wgOut->blockedPage();
2024                                 return;
2025                         }
2026                 } else {
2027                         $wgOut->permissionRequired( 'rollback' );
2028                         return;
2029                 }
2030
2031                 if ( wfReadOnly() ) {
2032                         $wgOut->readOnlyPage( $this->getContent() );
2033                         return;
2034                 }
2035                 if( !$wgUser->matchEditToken( $wgRequest->getVal( 'token' ),
2036                         array( $this->mTitle->getPrefixedText(),
2037                                 $wgRequest->getVal( 'from' ) )  ) ) {
2038                         $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
2039                         $wgOut->addWikiText( wfMsg( 'sessionfailure' ) );
2040                         return;
2041                 }
2042                 $dbw =& wfGetDB( DB_MASTER );
2043
2044                 # Enhanced rollback, marks edits rc_bot=1
2045                 $bot = $wgRequest->getBool( 'bot' );
2046
2047                 # Replace all this user's current edits with the next one down
2048                 $tt = $this->mTitle->getDBKey();
2049                 $n = $this->mTitle->getNamespace();
2050
2051                 # Get the last editor, lock table exclusively
2052                 $dbw->begin();
2053                 $current = Revision::newFromTitle( $this->mTitle );
2054                 if( is_null( $current ) ) {
2055                         # Something wrong... no page?
2056                         $dbw->rollback();
2057                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
2058                         return;
2059                 }
2060
2061                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
2062                 if( $from != $current->getUserText() ) {
2063                         $wgOut->setPageTitle( wfMsg('rollbackfailed') );
2064                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
2065                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
2066                                 htmlspecialchars( $from ),
2067                                 htmlspecialchars( $current->getUserText() ) ) );
2068                         if( $current->getComment() != '') {
2069                                 $wgOut->addHTML(
2070                                         wfMsg( 'editcomment',
2071                                         htmlspecialchars( $current->getComment() ) ) );
2072                         }
2073                         return;
2074                 }
2075
2076                 # Get the last edit not by this guy
2077                 $user = intval( $current->getUser() );
2078                 $user_text = $dbw->addQuotes( $current->getUserText() );
2079                 $s = $dbw->selectRow( 'revision',
2080                         array( 'rev_id', 'rev_timestamp' ),
2081                         array(
2082                                 'rev_page' => $current->getPage(),
2083                                 "rev_user <> {$user} OR rev_user_text <> {$user_text}"
2084                         ), $fname,
2085                         array(
2086                                 'USE INDEX' => 'page_timestamp',
2087                                 'ORDER BY'  => 'rev_timestamp DESC' )
2088                         );
2089                 if( $s === false ) {
2090                         # Something wrong
2091                         $dbw->rollback();
2092                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
2093                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
2094                         return;
2095                 }
2096
2097                 $set = array();
2098                 if ( $bot ) {
2099                         # Mark all reverted edits as bot
2100                         $set['rc_bot'] = 1;
2101                 }
2102                 if ( $wgUseRCPatrol ) {
2103                         # Mark all reverted edits as patrolled
2104                         $set['rc_patrolled'] = 1;
2105                 }
2106
2107                 if ( $set ) {
2108                         $dbw->update( 'recentchanges', $set,
2109                                 array( /* WHERE */
2110                                         'rc_cur_id'    => $current->getPage(),
2111                                         'rc_user_text' => $current->getUserText(),
2112                                         "rc_timestamp > '{$s->rev_timestamp}'",
2113                                 ), $fname
2114                         );
2115                 }
2116
2117                 # Get the edit summary
2118                 $target = Revision::newFromId( $s->rev_id );
2119                 $newComment = wfMsgForContent( 'revertpage', $target->getUserText(), $from );
2120                 $newComment = $wgRequest->getText( 'summary', $newComment );
2121
2122                 # Save it!
2123                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
2124                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
2125                 $wgOut->addHTML( '<h2>' . htmlspecialchars( $newComment ) . "</h2>\n<hr />\n" );
2126
2127                 $this->updateArticle( $target->getText(), $newComment, 1, $this->mTitle->userIsWatching(), $bot );
2128                 Article::onArticleEdit( $this->mTitle );
2129
2130                 $dbw->commit();
2131                 $wgOut->returnToMain( false );
2132         }
2133
2134
2135         /**
2136          * Do standard deferred updates after page view
2137          * @private
2138          */
2139         function viewUpdates() {
2140                 global $wgDeferredUpdateList;
2141
2142                 if ( 0 != $this->getID() ) {
2143                         global $wgDisableCounters;
2144                         if( !$wgDisableCounters ) {
2145                                 Article::incViewCount( $this->getID() );
2146                                 $u = new SiteStatsUpdate( 1, 0, 0 );
2147                                 array_push( $wgDeferredUpdateList, $u );
2148                         }
2149                 }
2150
2151                 # Update newtalk / watchlist notification status
2152                 global $wgUser;
2153                 $wgUser->clearNotification( $this->mTitle );
2154         }
2155
2156         /**
2157          * Do standard deferred updates after page edit.
2158          * Every 1000th edit, prune the recent changes table.
2159          * @private
2160          * @param string $text
2161          */
2162         function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange, $newid) {
2163                 global $wgDeferredUpdateList, $wgMessageCache, $wgUser, $wgParser;
2164
2165                 $fname = 'Article::editUpdates';
2166                 wfProfileIn( $fname );
2167
2168                 # Parse the text
2169                 $options = new ParserOptions;
2170                 $options->setTidy(true);
2171                 $poutput = $wgParser->parse( $text, $this->mTitle, $options, true, true, $newid );
2172
2173                 # Save it to the parser cache
2174                 $parserCache =& ParserCache::singleton();
2175                 $parserCache->save( $poutput, $this, $wgUser );
2176
2177                 # Update the links tables
2178                 $u = new LinksUpdate( $this->mTitle, $poutput );
2179                 $u->doUpdate();
2180
2181                 if ( wfRunHooks( 'ArticleEditUpdatesDeleteFromRecentchanges', array( &$this ) ) ) {
2182                         wfSeedRandom();
2183                         if ( 0 == mt_rand( 0, 999 ) ) {
2184                                 # Periodically flush old entries from the recentchanges table.
2185                                 global $wgRCMaxAge;
2186
2187                                 $dbw =& wfGetDB( DB_MASTER );
2188                                 $cutoff = $dbw->timestamp( time() - $wgRCMaxAge );
2189                                 $recentchanges = $dbw->tableName( 'recentchanges' );
2190                                 $sql = "DELETE FROM $recentchanges WHERE rc_timestamp < '{$cutoff}'";
2191                                 $dbw->query( $sql );
2192                         }
2193                 }
2194
2195                 $id = $this->getID();
2196                 $title = $this->mTitle->getPrefixedDBkey();
2197                 $shortTitle = $this->mTitle->getDBkey();
2198
2199                 if ( 0 == $id ) {
2200                         wfProfileOut( $fname );
2201                         return;
2202                 }
2203
2204                 $u = new SiteStatsUpdate( 0, 1, $this->mGoodAdjustment, $this->mTotalAdjustment );
2205                 array_push( $wgDeferredUpdateList, $u );
2206                 $u = new SearchUpdate( $id, $title, $text );
2207                 array_push( $wgDeferredUpdateList, $u );
2208
2209                 # If this is another user's talk page, update newtalk
2210
2211                 if ($this->mTitle->getNamespace() == NS_USER_TALK && $shortTitle != $wgUser->getName()) {
2212                         if (wfRunHooks('ArticleEditUpdateNewTalk', array(&$this)) ) {
2213                                 $other = User::newFromName( $shortTitle );
2214                                 if( is_null( $other ) && User::isIP( $shortTitle ) ) {
2215                                         // An anonymous user
2216                                         $other = new User();
2217                                         $other->setName( $shortTitle );
2218                                 }
2219                                 if( $other ) {
2220                                         $other->setNewtalk( true );
2221                                 }
2222                         }
2223                 }
2224
2225                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
2226                         $wgMessageCache->replace( $shortTitle, $text );
2227                 }
2228
2229                 wfProfileOut( $fname );
2230         }
2231
2232         /**
2233          * Generate the navigation links when browsing through an article revisions
2234          * It shows the information as:
2235          *   Revision as of \<date\>; view current revision
2236          *   \<- Previous version | Next Version -\>
2237          *
2238          * @private
2239          * @param string $oldid         Revision ID of this article revision
2240          */
2241         function setOldSubtitle( $oldid=0 ) {
2242                 global $wgLang, $wgOut, $wgUser;
2243
2244                 $current = ( $oldid == $this->mLatest );
2245                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
2246                 $sk = $wgUser->getSkin();
2247                 $lnk = $current
2248                         ? wfMsg( 'currentrevisionlink' )
2249                         : $lnk = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
2250                 $prev = $this->mTitle->getPreviousRevisionID( $oldid ) ;
2251                 $prevlink = $prev
2252                         ? $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid )
2253                         : wfMsg( 'previousrevision' );
2254                 $nextlink = $current
2255                         ? wfMsg( 'nextrevision' )
2256                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
2257                 $r = wfMsg( 'revisionasofwithlink', $td, $lnk, $prevlink, $nextlink );
2258                 $wgOut->setSubtitle( $r );
2259         }
2260
2261         /**
2262          * This function is called right before saving the wikitext,
2263          * so we can do things like signatures and links-in-context.
2264          *
2265          * @param string $text
2266          */
2267         function preSaveTransform( $text ) {
2268                 global $wgParser, $wgUser;
2269                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
2270         }
2271
2272         /* Caching functions */
2273
2274         /**
2275          * checkLastModified returns true if it has taken care of all
2276          * output to the client that is necessary for this request.
2277          * (that is, it has sent a cached version of the page)
2278          */
2279         function tryFileCache() {
2280                 static $called = false;
2281                 if( $called ) {
2282                         wfDebug( " tryFileCache() -- called twice!?\n" );
2283                         return;
2284                 }
2285                 $called = true;
2286                 if($this->isFileCacheable()) {
2287                         $touched = $this->mTouched;
2288                         $cache = new CacheManager( $this->mTitle );
2289                         if($cache->isFileCacheGood( $touched )) {
2290                                 wfDebug( " tryFileCache() - about to load\n" );
2291                                 $cache->loadFromFileCache();
2292                                 return true;
2293                         } else {
2294                                 wfDebug( " tryFileCache() - starting buffer\n" );
2295                                 ob_start( array(&$cache, 'saveToFileCache' ) );
2296                         }
2297                 } else {
2298                         wfDebug( " tryFileCache() - not cacheable\n" );
2299                 }
2300         }
2301
2302         /**
2303          * Check if the page can be cached
2304          * @return bool
2305          */
2306         function isFileCacheable() {
2307                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
2308                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
2309
2310                 return $wgUseFileCache
2311                         and (!$wgShowIPinHeader)
2312                         and ($this->getID() != 0)
2313                         and ($wgUser->isAnon())
2314                         and (!$wgUser->getNewtalk())
2315                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
2316                         and (empty( $action ) || $action == 'view')
2317                         and (!isset($oldid))
2318                         and (!isset($diff))
2319                         and (!isset($redirect))
2320                         and (!isset($printable))
2321                         and (!$this->mRedirectedFrom);
2322         }
2323
2324         /**
2325          * Loads page_touched and returns a value indicating if it should be used
2326          *
2327          */
2328         function checkTouched() {
2329                 $fname = 'Article::checkTouched';
2330                 if( !$this->mDataLoaded ) {
2331                         $this->loadPageData();
2332                 }
2333                 return !$this->mIsRedirect;
2334         }
2335
2336         /**
2337          * Get the page_touched field
2338          */
2339         function getTouched() {
2340                 # Ensure that page data has been loaded
2341                 if( !$this->mDataLoaded ) {
2342                         $this->loadPageData();
2343                 }
2344                 return $this->mTouched;
2345         }
2346
2347         /**
2348          * Get the page_latest field
2349          */
2350         function getLatest() {
2351                 if ( !$this->mDataLoaded ) {
2352                         $this->loadPageData();
2353                 }
2354                 return $this->mLatest;
2355         }
2356
2357         /**
2358          * Edit an article without doing all that other stuff
2359          * The article must already exist; link tables etc
2360          * are not updated, caches are not flushed.
2361          *
2362          * @param string $text text submitted
2363          * @param string $comment comment submitted
2364          * @param bool $minor whereas it's a minor modification
2365          */
2366         function quickEdit( $text, $comment = '', $minor = 0 ) {
2367                 $fname = 'Article::quickEdit';
2368                 wfProfileIn( $fname );
2369
2370                 $dbw =& wfGetDB( DB_MASTER );
2371                 $dbw->begin();
2372                 $revision = new Revision( array(
2373                         'page'       => $this->getId(),
2374                         'text'       => $text,
2375                         'comment'    => $comment,
2376                         'minor_edit' => $minor ? 1 : 0,
2377                         ) );
2378                 # fixme : $revisionId never used
2379                 $revisionId = $revision->insertOn( $dbw );
2380                 $this->updateRevisionOn( $dbw, $revision );
2381                 $dbw->commit();
2382
2383                 wfProfileOut( $fname );
2384         }
2385
2386         /**
2387          * Used to increment the view counter
2388          *
2389          * @static
2390          * @param integer $id article id
2391          */
2392         function incViewCount( $id ) {
2393                 $id = intval( $id );
2394                 global $wgHitcounterUpdateFreq, $wgDBtype;
2395
2396                 $dbw =& wfGetDB( DB_MASTER );
2397                 $pageTable = $dbw->tableName( 'page' );
2398                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
2399                 $acchitsTable = $dbw->tableName( 'acchits' );
2400
2401                 if( $wgHitcounterUpdateFreq <= 1 ){ //
2402                         $dbw->query( "UPDATE $pageTable SET page_counter = page_counter + 1 WHERE page_id = $id" );
2403                         return;
2404                 }
2405
2406                 # Not important enough to warrant an error page in case of failure
2407                 $oldignore = $dbw->ignoreErrors( true );
2408
2409                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2410
2411                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2412                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2413                         # Most of the time (or on SQL errors), skip row count check
2414                         $dbw->ignoreErrors( $oldignore );
2415                         return;
2416                 }
2417
2418                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2419                 $row = $dbw->fetchObject( $res );
2420                 $rown = intval( $row->n );
2421                 if( $rown >= $wgHitcounterUpdateFreq ){
2422                         wfProfileIn( 'Article::incViewCount-collect' );
2423                         $old_user_abort = ignore_user_abort( true );
2424
2425                         if ($wgDBtype == 'mysql')
2426                                 $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2427                         $tabletype = $wgDBtype == 'mysql' ? "ENGINE=HEAP " : '';
2428                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable $tabletype".
2429                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2430                                 'GROUP BY hc_id');
2431                         $dbw->query("DELETE FROM $hitcounterTable");
2432                         if ($wgDBtype == 'mysql')
2433                                 $dbw->query('UNLOCK TABLES');
2434                         $dbw->query("UPDATE $pageTable,$acchitsTable SET page_counter=page_counter + hc_n ".
2435                                 'WHERE page_id = hc_id');
2436                         $dbw->query("DROP TABLE $acchitsTable");
2437
2438                         ignore_user_abort( $old_user_abort );
2439                         wfProfileOut( 'Article::incViewCount-collect' );
2440                 }
2441                 $dbw->ignoreErrors( $oldignore );
2442         }
2443
2444         /**#@+
2445          * The onArticle*() functions are supposed to be a kind of hooks
2446          * which should be called whenever any of the specified actions
2447          * are done.
2448          *
2449          * This is a good place to put code to clear caches, for instance.
2450          *
2451          * This is called on page move and undelete, as well as edit
2452          * @static
2453          * @param $title_obj a title object
2454          */
2455
2456         function onArticleCreate($title_obj) {
2457                 global $wgUseSquid, $wgPostCommitUpdateList;
2458
2459                 $title_obj->touchLinks();
2460                 $titles = $title_obj->getLinksTo();
2461
2462                 # Purge squid
2463                 if ( $wgUseSquid ) {
2464                         $urls = $title_obj->getSquidURLs();
2465                         foreach ( $titles as $linkTitle ) {
2466                                 $urls[] = $linkTitle->getInternalURL();
2467                         }
2468                         $u = new SquidUpdate( $urls );
2469                         array_push( $wgPostCommitUpdateList, $u );
2470                 }
2471         }
2472
2473         function onArticleDelete( $title ) {
2474                 global $wgMessageCache;
2475
2476                 $title->touchLinks();
2477
2478                 if( $title->getNamespace() == NS_MEDIAWIKI) {
2479                         $wgMessageCache->replace( $title->getDBkey(), false );
2480                 }
2481         }
2482
2483         /**
2484          * Purge caches on page update etc
2485          */
2486         function onArticleEdit( $title ) {
2487                 global $wgUseSquid, $wgPostCommitUpdateList, $wgUseFileCache;
2488
2489                 $urls = array();
2490
2491                 // Template namespace? Purge all articles linking here.
2492                 // FIXME: When a templatelinks table arrives, use it for all includes.
2493                 if ( $title->getNamespace() == NS_TEMPLATE) {
2494                         $titles = $title->getLinksTo();
2495                         Title::touchArray( $titles );
2496                         if ( $wgUseSquid ) {
2497                                 foreach ( $titles as $link ) {
2498                                         $urls[] = $link->getInternalURL();
2499                                 }
2500                         }
2501                 }
2502
2503                 # Squid updates
2504                 if ( $wgUseSquid ) {
2505                         $urls = array_merge( $urls, $title->getSquidURLs() );
2506                         $u = new SquidUpdate( $urls );
2507                         array_push( $wgPostCommitUpdateList, $u );
2508                 }
2509
2510                 # File cache
2511                 if ( $wgUseFileCache ) {
2512                         $cm = new CacheManager( $title );
2513                         @unlink( $cm->fileCacheName() );
2514                 }
2515         }
2516
2517         /**#@-*/
2518
2519         /**
2520          * Info about this page
2521          * Called for ?action=info when $wgAllowPageInfo is on.
2522          *
2523          * @public
2524          */
2525         function info() {
2526                 global $wgLang, $wgOut, $wgAllowPageInfo, $wgUser;
2527                 $fname = 'Article::info';
2528
2529                 if ( !$wgAllowPageInfo ) {
2530                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
2531                         return;
2532                 }
2533
2534                 $page = $this->mTitle->getSubjectPage();
2535
2536                 $wgOut->setPagetitle( $page->getPrefixedText() );
2537                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
2538
2539                 # first, see if the page exists at all.
2540                 $exists = $page->getArticleId() != 0;
2541                 if( !$exists ) {
2542                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
2543                                 $wgOut->addHTML(wfMsgWeirdKey ( $this->mTitle->getText() ) );
2544                         } else {
2545                                 $wgOut->addHTML(wfMsg( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon' ) );
2546                         }
2547                 } else {
2548                         $dbr =& wfGetDB( DB_SLAVE );
2549                         $wl_clause = array(
2550                                 'wl_title'     => $page->getDBkey(),
2551                                 'wl_namespace' => $page->getNamespace() );
2552                         $numwatchers = $dbr->selectField(
2553                                 'watchlist',
2554                                 'COUNT(*)',
2555                                 $wl_clause,
2556                                 $fname,
2557                                 $this->getSelectOptions() );
2558
2559                         $pageInfo = $this->pageCountInfo( $page );
2560                         $talkInfo = $this->pageCountInfo( $page->getTalkPage() );
2561
2562                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $wgLang->formatNum( $numwatchers ) ) . '</li>' );
2563                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $wgLang->formatNum( $pageInfo['edits'] ) ) . '</li>');
2564                         if( $talkInfo ) {
2565                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $wgLang->formatNum( $talkInfo['edits'] ) ) . '</li>');
2566                         }
2567                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $wgLang->formatNum( $pageInfo['authors'] ) ) . '</li>' );
2568                         if( $talkInfo ) {
2569                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $wgLang->formatNum( $talkInfo['authors'] ) ) . '</li>' );
2570                         }
2571                         $wgOut->addHTML( '</ul>' );
2572
2573                 }
2574         }
2575
2576         /**
2577          * Return the total number of edits and number of unique editors
2578          * on a given page. If page does not exist, returns false.
2579          *
2580          * @param Title $title
2581          * @return array
2582          * @private
2583          */
2584         function pageCountInfo( $title ) {
2585                 $id = $title->getArticleId();
2586                 if( $id == 0 ) {
2587                         return false;
2588                 }
2589
2590                 $dbr =& wfGetDB( DB_SLAVE );
2591
2592                 $rev_clause = array( 'rev_page' => $id );
2593                 $fname = 'Article::pageCountInfo';
2594
2595                 $edits = $dbr->selectField(
2596                         'revision',
2597                         'COUNT(rev_page)',
2598                         $rev_clause,
2599                         $fname,
2600                         $this->getSelectOptions() );
2601
2602                 $authors = $dbr->selectField(
2603                         'revision',
2604                         'COUNT(DISTINCT rev_user_text)',
2605                         $rev_clause,
2606                         $fname,
2607                         $this->getSelectOptions() );
2608
2609                 return array( 'edits' => $edits, 'authors' => $authors );
2610         }
2611
2612         /**
2613          * Return a list of templates used by this article.
2614          * Uses the templatelinks table
2615          *
2616          * @return array Array of Title objects
2617          */
2618         function getUsedTemplates() {
2619                 $result = array();
2620                 $id = $this->mTitle->getArticleID();
2621                 if( $id == 0 ) {
2622                         return array();
2623                 }
2624
2625                 $dbr =& wfGetDB( DB_SLAVE );
2626                 $res = $dbr->select( array( 'templatelinks' ),
2627                         array( 'tl_namespace', 'tl_title' ),
2628                         array( 'tl_from' => $id ),
2629                         'Article:getUsedTemplates' );
2630                 if ( false !== $res ) {
2631                         if ( $dbr->numRows( $res ) ) {
2632                                 while ( $row = $dbr->fetchObject( $res ) ) {
2633                                         $result[] = Title::makeTitle( $row->tl_namespace, $row->tl_title );
2634                                 }
2635                         }
2636                 }
2637                 $dbr->freeResult( $res );
2638                 return $result;
2639         }
2640 }
2641
2642 ?>