includes/Article.php

   1 <?php
   2 /**
   3  * File for articles
   4  * @package MediaWiki
   5  */
   6
   7 /**
   8  * Class representing a MediaWiki article and history.
   9  *
  10  * See design.txt for an overview.
  11  * Note: edit user interface and cache support functions have been
  12  * moved to separate EditPage and HTMLFileCache classes.
  13  *
  14  * @package MediaWiki
  15  */
  16 class Article {
  17         /**@{{
  18          * @private
  19          */
  20         var $mComment;                  //!<
  21         var $mContent;                  //!<
  22         var $mContentLoaded;    //!<
  23         var $mCounter;                  //!<
  24         var $mForUpdate;                //!<
  25         var $mGoodAdjustment;   //!<
  26         var $mLatest;                   //!<
  27         var $mMinorEdit;                //!<
  28         var $mOldId;                    //!<
  29         var $mRedirectedFrom;   //!<
  30         var $mRedirectUrl;              //!<
  31         var $mRevIdFetched;             //!<
  32         var $mRevision;                 //!<
  33         var $mTimestamp;                //!<
  34         var $mTitle;                    //!<
  35         var $mTotalAdjustment;  //!<
  36         var $mTouched;                  //!<
  37         var $mUser;                             //!<
  38         var $mUserText;                 //!<
  39         /**@}}*/
  40
  41         /**
  42          * Constructor and clear the article
  43          * @param $title Reference to a Title object.
  44          * @param $oldId Integer revision ID, null to fetch from request, zero for current
  45          */
  46         function Article( &$title, $oldId = null ) {
  47                 $this->mTitle =& $title;
  48                 $this->mOldId = $oldId;
  49                 $this->clear();
  50         }
  51
  52         /**
  53          * Tell the page view functions that this view was redirected
  54          * from another page on the wiki.
  55          * @param $from Title object.
  56          */
  57         function setRedirectedFrom( $from ) {
  58                 $this->mRedirectedFrom = $from;
  59         }
  60
  61         /**
  62          * @return mixed false, Title of in-wiki target, or string with URL
  63          */
  64         function followRedirect() {
  65                 $text = $this->getContent();
  66                 $rt = Title::newFromRedirect( $text );
  67
  68                 # process if title object is valid and not special:userlogout
  69                 if( $rt ) {
  70                         if( $rt->getInterwiki() != '' ) {
  71                                 if( $rt->isLocal() ) {
  72                                         // Offsite wikis need an HTTP redirect.
  73                                         //
  74                                         // This can be hard to reverse and may produce loops,
  75                                         // so they may be disabled in the site configuration.
  76
  77                                         $source = $this->mTitle->getFullURL( 'redirect=no' );
  78                                         return $rt->getFullURL( 'rdfrom=' . urlencode( $source ) );
  79                                 }
  80                         } else {
  81                                 if( $rt->getNamespace() == NS_SPECIAL ) {
  82                                         // Gotta handle redirects to special pages differently:
  83                                         // Fill the HTTP response "Location" header and ignore
  84                                         // the rest of the page we're on.
  85                                         //
  86                                         // This can be hard to reverse, so they may be disabled.
  87
  88                                         if( $rt->isSpecial( 'Userlogout' ) ) {
  89                                                 // rolleyes
  90                                         } else {
  91                                                 return $rt->getFullURL();
  92                                         }
  93                                 }
  94                                 return $rt;
  95                         }
  96                 }
  97
  98                 // No or invalid redirect
  99                 return false;
 100         }
 101
 102         /**
 103          * get the title object of the article
 104          */
 105         function getTitle() {
 106                 return $this->mTitle;
 107         }
 108
 109         /**
 110           * Clear the object
 111           * @private
 112           */
 113         function clear() {
 114                 $this->mDataLoaded    = false;
 115                 $this->mContentLoaded = false;
 116
 117                 $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
 118                 $this->mRedirectedFrom = null; # Title object if set
 119                 $this->mUserText =
 120                 $this->mTimestamp = $this->mComment = '';
 121                 $this->mGoodAdjustment = $this->mTotalAdjustment = 0;
 122                 $this->mTouched = '19700101000000';
 123                 $this->mForUpdate = false;
 124                 $this->mIsRedirect = false;
 125                 $this->mRevIdFetched = 0;
 126                 $this->mRedirectUrl = false;
 127                 $this->mLatest = false;
 128         }
 129
 130         /**
 131          * Note that getContent/loadContent do not follow redirects anymore.
 132          * If you need to fetch redirectable content easily, try
 133          * the shortcut in Article::followContent()
 134          * FIXME
 135          * @todo There are still side-effects in this!
 136          *        In general, you should use the Revision class, not Article,
 137          *        to fetch text for purposes other than page views.
 138          *
 139          * @return Return the text of this revision
 140         */
 141         function getContent() {
 142                 global $wgUser, $wgOut;
 143
 144                 wfProfileIn( __METHOD__ );
 145
 146                 if ( 0 == $this->getID() ) {
 147                         wfProfileOut( __METHOD__ );
 148                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
 149
 150                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 151                                 $ret = wfMsgWeirdKey ( $this->mTitle->getText() ) ;
 152                         } else {
 153                                 $ret = wfMsg( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon' );
 154                         }
 155
 156                         return "<div class='noarticletext'>$ret</div>";
 157                 } else {
 158                         $this->loadContent();
 159                         wfProfileOut( __METHOD__ );
 160                         return $this->mContent;
 161                 }
 162         }
 163
 164         /**
 165          * This function returns the text of a section, specified by a number ($section).
 166          * A section is text under a heading like == Heading == or \<h1\>Heading\</h1\>, or
 167          * the first section before any such heading (section 0).
 168          *
 169          * If a section contains subsections, these are also returned.
 170          *
 171          * @param $text String: text to look in
 172          * @param $section Integer: section number
 173          * @return string text of the requested section
 174          * @deprecated
 175          */
 176         function getSection($text,$section) {
 177                 global $wgParser;
 178                 return $wgParser->getSection( $text, $section );
 179         }
 180
 181         /**
 182          * @return int The oldid of the article that is to be shown, 0 for the
 183          *             current revision
 184          */
 185         function getOldID() {
 186                 if ( is_null( $this->mOldId ) ) {
 187                         $this->mOldId = $this->getOldIDFromRequest();
 188                 }
 189                 return $this->mOldId;
 190         }
 191
 192         /**
 193          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 194          *
 195          * @return int The old id for the request
 196          */
 197         function getOldIDFromRequest() {
 198                 global $wgRequest;
 199                 $this->mRedirectUrl = false;
 200                 $oldid = $wgRequest->getVal( 'oldid' );
 201                 if ( isset( $oldid ) ) {
 202                         $oldid = intval( $oldid );
 203                         if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 204                                 $nextid = $this->mTitle->getNextRevisionID( $oldid );
 205                                 if ( $nextid  ) {
 206                                         $oldid = $nextid;
 207                                 } else {
 208                                         $this->mRedirectUrl = $this->mTitle->getFullURL( 'redirect=no' );
 209                                 }
 210                         } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 211                                 $previd = $this->mTitle->getPreviousRevisionID( $oldid );
 212                                 if ( $previd ) {
 213                                         $oldid = $previd;
 214                                 } else {
 215                                         # TODO
 216                                 }
 217                         }
 218                         # unused:
 219                         # $lastid = $oldid;
 220                 }
 221
 222                 if ( !$oldid ) {
 223                         $oldid = 0;
 224                 }
 225                 return $oldid;
 226         }
 227
 228         /**
 229          * Load the revision (including text) into this object
 230          */
 231         function loadContent() {
 232                 if ( $this->mContentLoaded ) return;
 233
 234                 # Query variables :P
 235                 $oldid = $this->getOldID();
 236
 237                 # Pre-fill content with error message so that if something
 238                 # fails we'll have something telling us what we intended.
 239                 $this->mOldId = $oldid;
 240                 $this->fetchContent( $oldid );
 241         }
 242
 243
 244         /**
 245          * Fetch a page record with the given conditions
 246          * @param Database $dbr
 247          * @param array    $conditions
 248          * @private
 249          */
 250         function pageData( &$dbr, $conditions ) {
 251                 $fields = array(
 252                                 'page_id',
 253                                 'page_namespace',
 254                                 'page_title',
 255                                 'page_restrictions',
 256                                 'page_counter',
 257                                 'page_is_redirect',
 258                                 'page_is_new',
 259                                 'page_random',
 260                                 'page_touched',
 261                                 'page_latest',
 262                                 'page_len' ) ;
 263                 wfRunHooks( 'ArticlePageDataBefore', array( &$this , &$fields ) )       ;
 264                 $row = $dbr->selectRow( 'page',
 265                         $fields,
 266                         $conditions,
 267                         'Article::pageData' );
 268                 wfRunHooks( 'ArticlePageDataAfter', array( &$this , &$row ) )   ;
 269                 return $row ;
 270         }
 271
 272         /**
 273          * @param Database $dbr
 274          * @param Title $title
 275          */
 276         function pageDataFromTitle( &$dbr, $title ) {
 277                 return $this->pageData( $dbr, array(
 278                         'page_namespace' => $title->getNamespace(),
 279                         'page_title'     => $title->getDBkey() ) );
 280         }
 281
 282         /**
 283          * @param Database $dbr
 284          * @param int $id
 285          */
 286         function pageDataFromId( &$dbr, $id ) {
 287                 return $this->pageData( $dbr, array( 'page_id' => $id ) );
 288         }
 289
 290         /**
 291          * Set the general counter, title etc data loaded from
 292          * some source.
 293          *
 294          * @param object $data
 295          * @private
 296          */
 297         function loadPageData( $data = 'fromdb' ) {
 298                 if ( $data === 'fromdb' ) {
 299                         $dbr =& $this->getDB();
 300                         $data = $this->pageDataFromId( $dbr, $this->getId() );
 301                 }
 302
 303                 $lc =& LinkCache::singleton();
 304                 if ( $data ) {
 305                         $lc->addGoodLinkObj( $data->page_id, $this->mTitle );
 306
 307                         $this->mTitle->mArticleID = $data->page_id;
 308
 309                         # Old-fashioned restrictions.
 310                         $this->mTitle->loadRestrictions( $data->page_restrictions );
 311
 312                         $this->mCounter     = $data->page_counter;
 313                         $this->mTouched     = wfTimestamp( TS_MW, $data->page_touched );
 314                         $this->mIsRedirect  = $data->page_is_redirect;
 315                         $this->mLatest      = $data->page_latest;
 316                 } else {
 317                         if ( is_object( $this->mTitle ) ) {
 318                                 $lc->addBadLinkObj( $this->mTitle );
 319                         }
 320                         $this->mTitle->mArticleID = 0;
 321                 }
 322
 323                 $this->mDataLoaded  = true;
 324         }
 325
 326         /**
 327          * Get text of an article from database
 328          * Does *NOT* follow redirects.
 329          * @param int $oldid 0 for whatever the latest revision is
 330          * @return string
 331          */
 332         function fetchContent( $oldid = 0 ) {
 333                 if ( $this->mContentLoaded ) {
 334                         return $this->mContent;
 335                 }
 336
 337                 $dbr =& $this->getDB();
 338
 339                 # Pre-fill content with error message so that if something
 340                 # fails we'll have something telling us what we intended.
 341                 $t = $this->mTitle->getPrefixedText();
 342                 if( $oldid ) {
 343                         $t .= ',oldid='.$oldid;
 344                 }
 345                 $this->mContent = wfMsg( 'missingarticle', $t ) ;
 346
 347                 if( $oldid ) {
 348                         $revision = Revision::newFromId( $oldid );
 349                         if( is_null( $revision ) ) {
 350                                 wfDebug( __METHOD__." failed to retrieve specified revision, id $oldid\n" );
 351                                 return false;
 352                         }
 353                         $data = $this->pageDataFromId( $dbr, $revision->getPage() );
 354                         if( !$data ) {
 355                                 wfDebug( __METHOD__." failed to get page data linked to revision id $oldid\n" );
 356                                 return false;
 357                         }
 358                         $this->mTitle = Title::makeTitle( $data->page_namespace, $data->page_title );
 359                         $this->loadPageData( $data );
 360                 } else {
 361                         if( !$this->mDataLoaded ) {
 362                                 $data = $this->pageDataFromTitle( $dbr, $this->mTitle );
 363                                 if( !$data ) {
 364                                         wfDebug( __METHOD__." failed to find page data for title " . $this->mTitle->getPrefixedText() . "\n" );
 365                                         return false;
 366                                 }
 367                                 $this->loadPageData( $data );
 368                         }
 369                         $revision = Revision::newFromId( $this->mLatest );
 370                         if( is_null( $revision ) ) {
 371                                 wfDebug( __METHOD__." failed to retrieve current page, rev_id {$data->page_latest}\n" );
 372                                 return false;
 373                         }
 374                 }
 375
 376                 // FIXME: Horrible, horrible! This content-loading interface just plain sucks.
 377                 // We should instead work with the Revision object when we need it...
 378                 $this->mContent = $revision->userCan( Revision::DELETED_TEXT ) ? $revision->getRawText() : "";
 379                 //$this->mContent   = $revision->getText();
 380
 381                 $this->mUser      = $revision->getUser();
 382                 $this->mUserText  = $revision->getUserText();
 383                 $this->mComment   = $revision->getComment();
 384                 $this->mTimestamp = wfTimestamp( TS_MW, $revision->getTimestamp() );
 385
 386                 $this->mRevIdFetched = $revision->getID();
 387                 $this->mContentLoaded = true;
 388                 $this->mRevision =& $revision;
 389
 390                 wfRunHooks( 'ArticleAfterFetchContent', array( &$this, &$this->mContent ) ) ;
 391
 392                 return $this->mContent;
 393         }
 394
 395         /**
 396          * Read/write accessor to select FOR UPDATE
 397          *
 398          * @param $x Mixed: FIXME
 399          */
 400         function forUpdate( $x = NULL ) {
 401                 return wfSetVar( $this->mForUpdate, $x );
 402         }
 403
 404         /**
 405          * Get the database which should be used for reads
 406          *
 407          * @return Database
 408          */
 409         function &getDB() {
 410                 return wfGetDB( DB_MASTER );
 411         }
 412
 413         /**
 414          * Get options for all SELECT statements
 415          *
 416          * @param $options Array: an optional options array which'll be appended to
 417          *                       the default
 418          * @return Array: options
 419          */
 420         function getSelectOptions( $options = '' ) {
 421                 if ( $this->mForUpdate ) {
 422                         if ( is_array( $options ) ) {
 423                                 $options[] = 'FOR UPDATE';
 424                         } else {
 425                                 $options = 'FOR UPDATE';
 426                         }
 427                 }
 428                 return $options;
 429         }
 430
 431         /**
 432          * @return int Page ID
 433          */
 434         function getID() {
 435                 if( $this->mTitle ) {
 436                         return $this->mTitle->getArticleID();
 437                 } else {
 438                         return 0;
 439                 }
 440         }
 441
 442         /**
 443          * @return bool Whether or not the page exists in the database
 444          */
 445         function exists() {
 446                 return $this->getId() != 0;
 447         }
 448
 449         /**
 450          * @return int The view count for the page
 451          */
 452         function getCount() {
 453                 if ( -1 == $this->mCounter ) {
 454                         $id = $this->getID();
 455                         if ( $id == 0 ) {
 456                                 $this->mCounter = 0;
 457                         } else {
 458                                 $dbr =& wfGetDB( DB_SLAVE );
 459                                 $this->mCounter = $dbr->selectField( 'page', 'page_counter', array( 'page_id' => $id ),
 460                                         'Article::getCount', $this->getSelectOptions() );
 461                         }
 462                 }
 463                 return $this->mCounter;
 464         }
 465
 466         /**
 467          * Determine whether a page  would be suitable for being counted as an
 468          * article in the site_stats table based on the title & its content
 469          *
 470          * @param $text String: text to analyze
 471          * @return bool
 472          */
 473         function isCountable( $text ) {
 474                 global $wgUseCommaCount;
 475
 476                 $token = $wgUseCommaCount ? ',' : '[[';
 477                 return
 478                         $this->mTitle->isContentPage()
 479                         && !$this->isRedirect( $text )
 480                         && in_string( $token, $text );
 481         }
 482
 483         /**
 484          * Tests if the article text represents a redirect
 485          *
 486          * @param $text String: FIXME
 487          * @return bool
 488          */
 489         function isRedirect( $text = false ) {
 490                 if ( $text === false ) {
 491                         $this->loadContent();
 492                         $titleObj = Title::newFromRedirect( $this->fetchContent() );
 493                 } else {
 494                         $titleObj = Title::newFromRedirect( $text );
 495                 }
 496                 return $titleObj !== NULL;
 497         }
 498
 499         /**
 500          * Returns true if the currently-referenced revision is the current edit
 501          * to this page (and it exists).
 502          * @return bool
 503          */
 504         function isCurrent() {
 505                 return $this->exists() &&
 506                         isset( $this->mRevision ) &&
 507                         $this->mRevision->isCurrent();
 508         }
 509
 510         /**
 511          * Loads everything except the text
 512          * This isn't necessary for all uses, so it's only done if needed.
 513          * @private
 514          */
 515         function loadLastEdit() {
 516                 if ( -1 != $this->mUser )
 517                         return;
 518
 519                 # New or non-existent articles have no user information
 520                 $id = $this->getID();
 521                 if ( 0 == $id ) return;
 522
 523                 $this->mLastRevision = Revision::loadFromPageId( $this->getDB(), $id );
 524                 if( !is_null( $this->mLastRevision ) ) {
 525                         $this->mUser      = $this->mLastRevision->getUser();
 526                         $this->mUserText  = $this->mLastRevision->getUserText();
 527                         $this->mTimestamp = $this->mLastRevision->getTimestamp();
 528                         $this->mComment   = $this->mLastRevision->getComment();
 529                         $this->mMinorEdit = $this->mLastRevision->isMinor();
 530                         $this->mRevIdFetched = $this->mLastRevision->getID();
 531                 }
 532         }
 533
 534         function getTimestamp() {
 535                 // Check if the field has been filled by ParserCache::get()
 536                 if ( !$this->mTimestamp ) {
 537                         $this->loadLastEdit();
 538                 }
 539                 return wfTimestamp(TS_MW, $this->mTimestamp);
 540         }
 541
 542         function getUser() {
 543                 $this->loadLastEdit();
 544                 return $this->mUser;
 545         }
 546
 547         function getUserText() {
 548                 $this->loadLastEdit();
 549                 return $this->mUserText;
 550         }
 551
 552         function getComment() {
 553                 $this->loadLastEdit();
 554                 return $this->mComment;
 555         }
 556
 557         function getMinorEdit() {
 558                 $this->loadLastEdit();
 559                 return $this->mMinorEdit;
 560         }
 561
 562         function getRevIdFetched() {
 563                 $this->loadLastEdit();
 564                 return $this->mRevIdFetched;
 565         }
 566
 567         /**
 568          * @todo Document, fixme $offset never used.
 569          * @param $limit Integer: default 0.
 570          * @param $offset Integer: default 0.
 571          */
 572         function getContributors($limit = 0, $offset = 0) {
 573                 # XXX: this is expensive; cache this info somewhere.
 574
 575                 $contribs = array();
 576                 $dbr =& wfGetDB( DB_SLAVE );
 577                 $revTable = $dbr->tableName( 'revision' );
 578                 $userTable = $dbr->tableName( 'user' );
 579                 $user = $this->getUser();
 580                 $pageId = $this->getId();
 581
 582                 $sql = "SELECT rev_user, rev_user_text, user_real_name, MAX(rev_timestamp) as timestamp
 583                         FROM $revTable LEFT JOIN $userTable ON rev_user = user_id
 584                         WHERE rev_page = $pageId
 585                         AND rev_user != $user
 586                         GROUP BY rev_user, rev_user_text, user_real_name
 587                         ORDER BY timestamp DESC";
 588
 589                 if ($limit > 0) { $sql .= ' LIMIT '.$limit; }
 590                 $sql .= ' '. $this->getSelectOptions();
 591
 592                 $res = $dbr->query($sql, __METHOD__);
 593
 594                 while ( $line = $dbr->fetchObject( $res ) ) {
 595                         $contribs[] = array($line->rev_user, $line->rev_user_text, $line->user_real_name);
 596                 }
 597
 598                 $dbr->freeResult($res);
 599                 return $contribs;
 600         }
 601
 602         /**
 603          * This is the default action of the script: just view the page of
 604          * the given title.
 605         */
 606         function view() {
 607                 global $wgUser, $wgOut, $wgRequest, $wgContLang;
 608                 global $wgEnableParserCache, $wgStylePath, $wgUseRCPatrol, $wgParser;
 609                 global $wgUseTrackbacks, $wgNamespaceRobotPolicies;
 610                 $sk = $wgUser->getSkin();
 611
 612                 wfProfileIn( __METHOD__ );
 613
 614                 $parserCache =& ParserCache::singleton();
 615                 $ns = $this->mTitle->getNamespace(); # shortcut
 616
 617                 # Get variables from query string
 618                 $oldid = $this->getOldID();
 619
 620                 # getOldID may want us to redirect somewhere else
 621                 if ( $this->mRedirectUrl ) {
 622                         $wgOut->redirect( $this->mRedirectUrl );
 623                         wfProfileOut( __METHOD__ );
 624                         return;
 625                 }
 626
 627                 $diff = $wgRequest->getVal( 'diff' );
 628                 $rcid = $wgRequest->getVal( 'rcid' );
 629                 $rdfrom = $wgRequest->getVal( 'rdfrom' );
 630                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
 631
 632                 $wgOut->setArticleFlag( true );
 633
 634                 # Discourage indexing of printable versions, but encourage following
 635                 if( $wgOut->isPrintable() ) {
 636                         $policy = 'noindex,follow';
 637                 } elseif( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 638                         # Honour customised robot policies for this namespace
 639                         $policy = $wgNamespaceRobotPolicies[$ns];
 640                 } else {
 641                         # Default to encourage indexing and following links
 642                         $policy = 'index,follow';
 643                 }
 644                 $wgOut->setRobotPolicy( $policy );
 645
 646                 # If we got diff and oldid in the query, we want to see a
 647                 # diff page instead of the article.
 648
 649                 if ( !is_null( $diff ) ) {
 650                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 651
 652                         $de = new DifferenceEngine( $this->mTitle, $oldid, $diff, $rcid );
 653                         // DifferenceEngine directly fetched the revision:
 654                         $this->mRevIdFetched = $de->mNewid;
 655                         $de->showDiffPage( $diffOnly );
 656
 657                         // Needed to get the page's current revision
 658                         $this->loadPageData();
 659                         if( $diff == 0 || $diff == $this->mLatest ) {
 660                                 # Run view updates for current revision only
 661                                 $this->viewUpdates();
 662                         }
 663                         wfProfileOut( __METHOD__ );
 664                         return;
 665                 }
 666
 667                 if ( empty( $oldid ) && $this->checkTouched() ) {
 668                         $wgOut->setETag($parserCache->getETag($this, $wgUser));
 669
 670                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 671                                 wfProfileOut( __METHOD__ );
 672                                 return;
 673                         } else if ( $this->tryFileCache() ) {
 674                                 # tell wgOut that output is taken care of
 675                                 $wgOut->disable();
 676                                 $this->viewUpdates();
 677                                 wfProfileOut( __METHOD__ );
 678                                 return;
 679                         }
 680                 }
 681
 682                 # Should the parser cache be used?
 683                 $pcache = $wgEnableParserCache &&
 684                         intval( $wgUser->getOption( 'stubthreshold' ) ) == 0 &&
 685                         $this->exists() &&
 686                         empty( $oldid );
 687                 wfDebug( 'Article::view using parser cache: ' . ($pcache ? 'yes' : 'no' ) . "\n" );
 688                 if ( $wgUser->getOption( 'stubthreshold' ) ) {
 689                         wfIncrStats( 'pcache_miss_stub' );
 690                 }
 691
 692                 $wasRedirected = false;
 693                 if ( isset( $this->mRedirectedFrom ) ) {
 694                         // This is an internally redirected page view.
 695                         // We'll need a backlink to the source page for navigation.
 696                         if ( wfRunHooks( 'ArticleViewRedirect', array( &$this ) ) ) {
 697                                 $sk = $wgUser->getSkin();
 698                                 $redir = $sk->makeKnownLinkObj( $this->mRedirectedFrom, '', 'redirect=no' );
 699                                 $s = wfMsg( 'redirectedfrom', $redir );
 700                                 $wgOut->setSubtitle( $s );
 701
 702                                 // Set the fragment if one was specified in the redirect
 703                                 if ( strval( $this->mTitle->getFragment() ) != '' ) {
 704                                         $fragment = Xml::escapeJsString( $this->mTitle->getFragmentForURL() );
 705                                         $wgOut->addInlineScript( "redirectToFragment(\"$fragment\");" );
 706                                 }
 707                                 $wasRedirected = true;
 708                         }
 709                 } elseif ( !empty( $rdfrom ) ) {
 710                         // This is an externally redirected view, from some other wiki.
 711                         // If it was reported from a trusted site, supply a backlink.
 712                         global $wgRedirectSources;
 713                         if( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 714                                 $sk = $wgUser->getSkin();
 715                                 $redir = $sk->makeExternalLink( $rdfrom, $rdfrom );
 716                                 $s = wfMsg( 'redirectedfrom', $redir );
 717                                 $wgOut->setSubtitle( $s );
 718                                 $wasRedirected = true;
 719                         }
 720                 }
 721
 722                 $outputDone = false;
 723                 if ( $pcache ) {
 724                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 725                                 wfRunHooks( 'ArticleViewHeader', array( &$this ) );
 726                                 $outputDone = true;
 727                         }
 728                 }
 729                 if ( !$outputDone ) {
 730                         $text = $this->getContent();
 731                         if ( $text === false ) {
 732                                 # Failed to load, replace text with error message
 733                                 $t = $this->mTitle->getPrefixedText();
 734                                 if( $oldid ) {
 735                                         $t .= ',oldid='.$oldid;
 736                                         $text = wfMsg( 'missingarticle', $t );
 737                                 } else {
 738                                         $text = wfMsg( 'noarticletext', $t );
 739                                 }
 740                         }
 741
 742                         # Another whitelist check in case oldid is altering the title
 743                         if ( !$this->mTitle->userCanRead() ) {
 744                                 $wgOut->loginToUse();
 745                                 $wgOut->output();
 746                                 exit;
 747                         }
 748
 749                         # We're looking at an old revision
 750
 751                         if ( !empty( $oldid ) ) {
 752                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 753                                 if( is_null( $this->mRevision ) ) {
 754                                         // FIXME: This would be a nice place to load the 'no such page' text.
 755                                 } else {
 756                                         $this->setOldSubtitle( isset($this->mOldId) ? $this->mOldId : $oldid );
 757                                         if( $this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
 758                                                 if( !$this->mRevision->userCan( Revision::DELETED_TEXT ) ) {
 759                                                         $wgOut->addWikiText( wfMsg( 'rev-deleted-text-permission' ) );
 760                                                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 761                                                         return;
 762                                                 } else {
 763                                                         $wgOut->addWikiText( wfMsg( 'rev-deleted-text-view' ) );
 764                                                         // and we are allowed to see...
 765                                                 }
 766                                         }
 767                                 }
 768
 769                         }
 770                 }
 771                 if( !$outputDone ) {
 772                         /**
 773                          * @fixme: this hook doesn't work most of the time, as it doesn't
 774                          * trigger when the parser cache is used.
 775                          */
 776                         wfRunHooks( 'ArticleViewHeader', array( &$this ) ) ;
 777                         $wgOut->setRevisionId( $this->getRevIdFetched() );
 778                         # wrap user css and user js in pre and don't parse
 779                         # XXX: use $this->mTitle->usCssJsSubpage() when php is fixed/ a workaround is found
 780                         if (
 781                                 $ns == NS_USER &&
 782                                 preg_match('/\\/[\\w]+\\.(css|js)$/', $this->mTitle->getDBkey())
 783                         ) {
 784                                 $wgOut->addWikiText( wfMsg('clearyourcache'));
 785                                 $wgOut->addHTML( '<pre>'.htmlspecialchars($this->mContent)."\n</pre>" );
 786                         } else if ( $rt = Title::newFromRedirect( $text ) ) {
 787                                 # Display redirect
 788                                 $imageDir = $wgContLang->isRTL() ? 'rtl' : 'ltr';
 789                                 $imageUrl = $wgStylePath.'/common/images/redirect' . $imageDir . '.png';
 790                                 # Don't overwrite the subtitle if this was an old revision
 791                                 if( !$wasRedirected && $this->isCurrent() ) {
 792                                         $wgOut->setSubtitle( wfMsgHtml( 'redirectpagesub' ) );
 793                                 }
 794                                 $link = $sk->makeLinkObj( $rt, $rt->getFullText() );
 795
 796                                 $wgOut->addHTML( '<img src="'.$imageUrl.'" alt="#REDIRECT " />' .
 797                                   '<span class="redirectText">'.$link.'</span>' );
 798
 799                                 $parseout = $wgParser->parse($text, $this->mTitle, ParserOptions::newFromUser($wgUser));
 800                                 $wgOut->addParserOutputNoText( $parseout );
 801                         } else if ( $pcache ) {
 802                                 # Display content and save to parser cache
 803                                 $this->outputWikiText( $text );
 804                         } else {
 805                                 # Display content, don't attempt to save to parser cache
 806                                 # Don't show section-edit links on old revisions... this way lies madness.
 807                                 if( !$this->isCurrent() ) {
 808                                         $oldEditSectionSetting = $wgOut->parserOptions()->setEditSection( false );
 809                                 }
 810                                 # Display content and don't save to parser cache
 811                                 $this->outputWikiText( $text, false );
 812
 813                                 if( !$this->isCurrent() ) {
 814                                         $wgOut->parserOptions()->setEditSection( $oldEditSectionSetting );
 815                                 }
 816                         }
 817                 }
 818                 /* title may have been set from the cache */
 819                 $t = $wgOut->getPageTitle();
 820                 if( empty( $t ) ) {
 821                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 822                 }
 823
 824                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 825                 if( $ns == NS_USER_TALK &&
 826                         User::isIP( $this->mTitle->getText() ) ) {
 827                         $wgOut->addWikiText( wfMsg('anontalkpagetext') );
 828                 }
 829
 830                 # If we have been passed an &rcid= parameter, we want to give the user a
 831                 # chance to mark this new article as patrolled.
 832                 if ( $wgUseRCPatrol && !is_null( $rcid ) && $rcid != 0 && $wgUser->isAllowed( 'patrol' ) ) {
 833                         $wgOut->addHTML(
 834                                 "<div class='patrollink'>" .
 835                                         wfMsg ( 'markaspatrolledlink',
 836                                         $sk->makeKnownLinkObj( $this->mTitle, wfMsg('markaspatrolledtext'), "action=markpatrolled&rcid=$rcid" )
 837                                         ) .
 838                                 '</div>'
 839                          );
 840                 }
 841
 842                 # Trackbacks
 843                 if ($wgUseTrackbacks)
 844                         $this->addTrackbacks();
 845
 846                 $this->viewUpdates();
 847                 wfProfileOut( __METHOD__ );
 848         }
 849
 850         function addTrackbacks() {
 851                 global $wgOut, $wgUser;
 852
 853                 $dbr =& wfGetDB(DB_SLAVE);
 854                 $tbs = $dbr->select(
 855                                 /* FROM   */ 'trackbacks',
 856                                 /* SELECT */ array('tb_id', 'tb_title', 'tb_url', 'tb_ex', 'tb_name'),
 857                                 /* WHERE  */ array('tb_page' => $this->getID())
 858                 );
 859
 860                 if (!$dbr->numrows($tbs))
 861                         return;
 862
 863                 $tbtext = "";
 864                 while ($o = $dbr->fetchObject($tbs)) {
 865                         $rmvtxt = "";
 866                         if ($wgUser->isAllowed( 'trackback' )) {
 867                                 $delurl = $this->mTitle->getFullURL("action=deletetrackback&tbid="
 868                                                 . $o->tb_id . "&token=" . $wgUser->editToken());
 869                                 $rmvtxt = wfMsg('trackbackremove', $delurl);
 870                         }
 871                         $tbtext .= wfMsg(strlen($o->tb_ex) ? 'trackbackexcerpt' : 'trackback',
 872                                         $o->tb_title,
 873                                         $o->tb_url,
 874                                         $o->tb_ex,
 875                                         $o->tb_name,
 876                                         $rmvtxt);
 877                 }
 878                 $wgOut->addWikitext(wfMsg('trackbackbox', $tbtext));
 879         }
 880
 881         function deletetrackback() {
 882                 global $wgUser, $wgRequest, $wgOut, $wgTitle;
 883
 884                 if (!$wgUser->matchEditToken($wgRequest->getVal('token'))) {
 885                         $wgOut->addWikitext(wfMsg('sessionfailure'));
 886                         return;
 887                 }
 888
 889                 if ((!$wgUser->isAllowed('delete'))) {
 890                         $wgOut->permissionRequired( 'delete' );
 891                         return;
 892                 }
 893
 894                 if (wfReadOnly()) {
 895                         $wgOut->readOnlyPage();
 896                         return;
 897                 }
 898
 899                 $db =& wfGetDB(DB_MASTER);
 900                 $db->delete('trackbacks', array('tb_id' => $wgRequest->getInt('tbid')));
 901                 $wgTitle->invalidateCache();
 902                 $wgOut->addWikiText(wfMsg('trackbackdeleteok'));
 903         }
 904
 905         function render() {
 906                 global $wgOut;
 907
 908                 $wgOut->setArticleBodyOnly(true);
 909                 $this->view();
 910         }
 911
 912         /**
 913          * Handle action=purge
 914          */
 915         function purge() {
 916                 global $wgUser, $wgRequest, $wgOut;
 917
 918                 if ( $wgUser->isAllowed( 'purge' ) || $wgRequest->wasPosted() ) {
 919                         if( wfRunHooks( 'ArticlePurge', array( &$this ) ) ) {
 920                                 $this->doPurge();
 921                         }
 922                 } else {
 923                         $msg = $wgOut->parse( wfMsg( 'confirm_purge' ) );
 924                         $action = $this->mTitle->escapeLocalURL( 'action=purge' );
 925                         $button = htmlspecialchars( wfMsg( 'confirm_purge_button' ) );
 926                         $msg = str_replace( '$1',
 927                                 "<form method=\"post\" action=\"$action\">\n" .
 928                                 "<input type=\"submit\" name=\"submit\" value=\"$button\" />\n" .
 929                                 "</form>\n", $msg );
 930
 931                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 932                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
 933                         $wgOut->addHTML( $msg );
 934                 }
 935         }
 936
 937         /**
 938          * Perform the actions of a page purging
 939          */
 940         function doPurge() {
 941                 global $wgUseSquid;
 942                 // Invalidate the cache
 943                 $this->mTitle->invalidateCache();
 944
 945                 if ( $wgUseSquid ) {
 946                         // Commit the transaction before the purge is sent
 947                         $dbw = wfGetDB( DB_MASTER );
 948                         $dbw->immediateCommit();
 949
 950                         // Send purge
 951                         $update = SquidUpdate::newSimplePurge( $this->mTitle );
 952                         $update->doUpdate();
 953                 }
 954                 $this->view();
 955         }
 956
 957         /**
 958          * Insert a new empty page record for this article.
 959          * This *must* be followed up by creating a revision
 960          * and running $this->updateToLatest( $rev_id );
 961          * or else the record will be left in a funky state.
 962          * Best if all done inside a transaction.
 963          *
 964          * @param Database $dbw
 965          * @param string   $restrictions
 966          * @return int     The newly created page_id key
 967          * @private
 968          */
 969         function insertOn( &$dbw, $restrictions = '' ) {
 970                 wfProfileIn( __METHOD__ );
 971
 972                 $page_id = $dbw->nextSequenceValue( 'page_page_id_seq' );
 973                 $dbw->insert( 'page', array(
 974                         'page_id'           => $page_id,
 975                         'page_namespace'    => $this->mTitle->getNamespace(),
 976                         'page_title'        => $this->mTitle->getDBkey(),
 977                         'page_counter'      => 0,
 978                         'page_is_redirect'  => 0, # Will set this shortly...
 979                         'page_is_new'       => 1,
 980                         'page_random'       => wfRandom(),
 981                         'page_touched'      => $dbw->timestamp(),
 982                         'page_latest'       => 0, # Fill this in shortly...
 983                         'page_len'          => 0, # Fill this in shortly...
 984                 ), __METHOD__ );
 985                 $newid = $dbw->insertId();
 986
 987                 $this->mTitle->resetArticleId( $newid );
 988
 989                 wfProfileOut( __METHOD__ );
 990                 return $newid;
 991         }
 992
 993         /**
 994          * Update the page record to point to a newly saved revision.
 995          *
 996          * @param Database $dbw
 997          * @param Revision $revision For ID number, and text used to set
 998                                      length and redirect status fields
 999          * @param int $lastRevision If given, will not overwrite the page field
1000          *                          when different from the currently set value.
1001          *                          Giving 0 indicates the new page flag should
1002          *                          be set on.
1003          * @param bool $lastRevIsRedirect If given, will optimize adding and
1004          *                                                      removing rows in redirect table.
1005          * @return bool true on success, false on failure
1006          * @private
1007          */
1008         function updateRevisionOn( &$dbw, $revision, $lastRevision = null, $lastRevIsRedirect = null ) {
1009                 wfProfileIn( __METHOD__ );
1010
1011                 $text = $revision->getText();
1012                 $rt = Title::newFromRedirect( $text );
1013
1014                 $conditions = array( 'page_id' => $this->getId() );
1015                 if( !is_null( $lastRevision ) ) {
1016                         # An extra check against threads stepping on each other
1017                         $conditions['page_latest'] = $lastRevision;
1018                 }
1019
1020                 $dbw->update( 'page',
1021                         array( /* SET */
1022                                 'page_latest'      => $revision->getId(),
1023                                 'page_touched'     => $dbw->timestamp(),
1024                                 'page_is_new'      => ($lastRevision === 0) ? 1 : 0,
1025                                 'page_is_redirect' => $rt !== NULL ? 1 : 0,
1026                                 'page_len'         => strlen( $text ),
1027                         ),
1028                         $conditions,
1029                         __METHOD__ );
1030
1031                 $result = $dbw->affectedRows() != 0;
1032
1033                 if ($result) {
1034                         // FIXME: Should the result from updateRedirectOn() be returned instead?
1035                         $this->updateRedirectOn( $dbw, $rt, $lastRevIsRedirect );
1036                 }
1037
1038                 wfProfileOut( __METHOD__ );
1039                 return $result;
1040         }
1041
1042         /**
1043          * Add row to the redirect table if this is a redirect, remove otherwise.
1044          *
1045          * @param Database $dbw
1046          * @param $redirectTitle a title object pointing to the redirect target,
1047          *                                                      or NULL if this is not a redirect
1048          * @param bool $lastRevIsRedirect If given, will optimize adding and
1049          *                                                      removing rows in redirect table.
1050          * @return bool true on success, false on failure
1051          * @private
1052          */
1053         function updateRedirectOn( &$dbw, $redirectTitle, $lastRevIsRedirect = null ) {
1054
1055                 // Always update redirects (target link might have changed)
1056                 // Update/Insert if we don't know if the last revision was a redirect or not
1057                 // Delete if changing from redirect to non-redirect
1058                 $isRedirect = !is_null($redirectTitle);
1059                 if ($isRedirect || is_null($lastRevIsRedirect) || $lastRevIsRedirect !== $isRedirect) {
1060
1061                         wfProfileIn( __METHOD__ );
1062
1063                         if ($isRedirect) {
1064
1065                                 // This title is a redirect, Add/Update row in the redirect table
1066                                 $set = array( /* SET */
1067                                         'rd_namespace' => $redirectTitle->getNamespace(),
1068                                         'rd_title'     => $redirectTitle->getDBkey(),
1069                                         'rd_from'      => $this->getId(),
1070                                 );
1071
1072                                 $dbw->replace( 'redirect', array( 'rd_from' ), $set, __METHOD__ );
1073                         } else {
1074                                 // This is not a redirect, remove row from redirect table
1075                                 $where = array( 'rd_from' => $this->getId() );
1076                                 $dbw->delete( 'redirect', $where, __METHOD__);
1077                         }
1078
1079                         wfProfileOut( __METHOD__ );
1080                         return ( $dbw->affectedRows() != 0 );
1081                 }
1082
1083                 return true;
1084         }
1085
1086         /**
1087          * If the given revision is newer than the currently set page_latest,
1088          * update the page record. Otherwise, do nothing.
1089          *
1090          * @param Database $dbw
1091          * @param Revision $revision
1092          */
1093         function updateIfNewerOn( &$dbw, $revision ) {
1094                 wfProfileIn( __METHOD__ );
1095
1096                 $row = $dbw->selectRow(
1097                         array( 'revision', 'page' ),
1098                         array( 'rev_id', 'rev_timestamp', 'page_is_redirect' ),
1099                         array(
1100                                 'page_id' => $this->getId(),
1101                                 'page_latest=rev_id' ),
1102                         __METHOD__ );
1103                 if( $row ) {
1104                         if( wfTimestamp(TS_MW, $row->rev_timestamp) >= $revision->getTimestamp() ) {
1105                                 wfProfileOut( __METHOD__ );
1106                                 return false;
1107                         }
1108                         $prev = $row->rev_id;
1109                         $lastRevIsRedirect = (bool)$row->page_is_redirect;
1110                 } else {
1111                         # No or missing previous revision; mark the page as new
1112                         $prev = 0;
1113                         $lastRevIsRedirect = null;
1114                 }
1115
1116                 $ret = $this->updateRevisionOn( $dbw, $revision, $prev, $lastRevIsRedirect );
1117                 wfProfileOut( __METHOD__ );
1118                 return $ret;
1119         }
1120
1121         /**
1122          * @return string Complete article text, or null if error
1123          */
1124         function replaceSection($section, $text, $summary = '', $edittime = NULL) {
1125                 wfProfileIn( __METHOD__ );
1126
1127                 if( $section == '' ) {
1128                         // Whole-page edit; let the text through unmolested.
1129                 } else {
1130                         if( is_null( $edittime ) ) {
1131                                 $rev = Revision::newFromTitle( $this->mTitle );
1132                         } else {
1133                                 $dbw =& wfGetDB( DB_MASTER );
1134                                 $rev = Revision::loadFromTimestamp( $dbw, $this->mTitle, $edittime );
1135                         }
1136                         if( is_null( $rev ) ) {
1137                                 wfDebug( "Article::replaceSection asked for bogus section (page: " .
1138                                         $this->getId() . "; section: $section; edittime: $edittime)\n" );
1139                                 return null;
1140                         }
1141                         $oldtext = $rev->getText();
1142
1143                         if( $section == 'new' ) {
1144                                 # Inserting a new section
1145                                 $subject = $summary ? "== {$summary} ==\n\n" : '';
1146                                 $text = strlen( trim( $oldtext ) ) > 0
1147                                                 ? "{$oldtext}\n\n{$subject}{$text}"
1148                                                 : "{$subject}{$text}";
1149                         } else {
1150                                 # Replacing an existing section; roll out the big guns
1151                                 global $wgParser;
1152                                 $text = $wgParser->replaceSection( $oldtext, $section, $text );
1153                         }
1154
1155                 }
1156
1157                 wfProfileOut( __METHOD__ );
1158                 return $text;
1159         }
1160
1161         /**
1162          * @deprecated use Article::doEdit()
1163          */
1164         function insertNewArticle( $text, $summary, $isminor, $watchthis, $suppressRC=false, $comment=false ) {
1165                 $flags = EDIT_NEW | EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1166                         ( $isminor ? EDIT_MINOR : 0 ) |
1167                         ( $suppressRC ? EDIT_SUPPRESS_RC : 0 );
1168
1169                 # If this is a comment, add the summary as headline
1170                 if ( $comment && $summary != "" ) {
1171                         $text = "== {$summary} ==\n\n".$text;
1172                 }
1173
1174                 $this->doEdit( $text, $summary, $flags );
1175
1176                 $dbw =& wfGetDB( DB_MASTER );
1177                 if ($watchthis) {
1178                         if (!$this->mTitle->userIsWatching()) {
1179                                 $dbw->begin();
1180                                 $this->doWatch();
1181                                 $dbw->commit();
1182                         }
1183                 } else {
1184                         if ( $this->mTitle->userIsWatching() ) {
1185                                 $dbw->begin();
1186                                 $this->doUnwatch();
1187                                 $dbw->commit();
1188                         }
1189                 }
1190                 $this->doRedirect( $this->isRedirect( $text ) );
1191         }
1192
1193         /**
1194          * @deprecated use Article::doEdit()
1195          */
1196         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
1197                 $flags = EDIT_UPDATE | EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1198                         ( $minor ? EDIT_MINOR : 0 ) |
1199                         ( $forceBot ? EDIT_FORCE_BOT : 0 );
1200
1201                 $good = $this->doEdit( $text, $summary, $flags );
1202                 if ( $good ) {
1203                         $dbw =& wfGetDB( DB_MASTER );
1204                         if ($watchthis) {
1205                                 if (!$this->mTitle->userIsWatching()) {
1206                                         $dbw->begin();
1207                                         $this->doWatch();
1208                                         $dbw->commit();
1209                                 }
1210                         } else {
1211                                 if ( $this->mTitle->userIsWatching() ) {
1212                                         $dbw->begin();
1213                                         $this->doUnwatch();
1214                                         $dbw->commit();
1215                                 }
1216                         }
1217
1218                         $this->doRedirect( $this->isRedirect( $text ), $sectionanchor );
1219                 }
1220                 return $good;
1221         }
1222
1223         /**
1224          * Article::doEdit()
1225          *
1226          * Change an existing article or create a new article. Updates RC and all necessary caches,
1227          * optionally via the deferred update array.
1228          *
1229          * $wgUser must be set before calling this function.
1230          *
1231          * @param string $text New text
1232          * @param string $summary Edit summary
1233          * @param integer $flags bitfield:
1234          *      EDIT_NEW
1235          *          Article is known or assumed to be non-existent, create a new one
1236          *      EDIT_UPDATE
1237          *          Article is known or assumed to be pre-existing, update it
1238          *      EDIT_MINOR
1239          *          Mark this edit minor, if the user is allowed to do so
1240          *      EDIT_SUPPRESS_RC
1241          *          Do not log the change in recentchanges
1242          *      EDIT_FORCE_BOT
1243          *          Mark the edit a "bot" edit regardless of user rights
1244          *      EDIT_DEFER_UPDATES
1245          *          Defer some of the updates until the end of index.php
1246          *      EDIT_AUTOSUMMARY
1247          *          Fill in blank summaries with generated text where possible
1248          *
1249          * If neither EDIT_NEW nor EDIT_UPDATE is specified, the status of the article will be detected.
1250          * If EDIT_UPDATE is specified and the article doesn't exist, the function will return false. If
1251          * EDIT_NEW is specified and the article does exist, a duplicate key error will cause an exception
1252          * to be thrown from the Database. These two conditions are also possible with auto-detection due
1253          * to MediaWiki's performance-optimised locking strategy.
1254          *
1255          * @return bool success
1256          */
1257         function doEdit( $text, $summary, $flags = 0 ) {
1258                 global $wgUser, $wgDBtransactions;
1259
1260                 wfProfileIn( __METHOD__ );
1261                 $good = true;
1262
1263                 if ( !($flags & EDIT_NEW) && !($flags & EDIT_UPDATE) ) {
1264                         $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
1265                         if ( $aid ) {
1266                                 $flags |= EDIT_UPDATE;
1267                         } else {
1268                                 $flags |= EDIT_NEW;
1269                         }
1270                 }
1271
1272                 if( !wfRunHooks( 'ArticleSave', array( &$this, &$wgUser, &$text,
1273                         &$summary, $flags & EDIT_MINOR,
1274                         null, null, &$flags ) ) )
1275                 {
1276                         wfDebug( __METHOD__ . ": ArticleSave hook aborted save!\n" );
1277                         wfProfileOut( __METHOD__ );
1278                         return false;
1279                 }
1280
1281                 # Silently ignore EDIT_MINOR if not allowed
1282                 $isminor = ( $flags & EDIT_MINOR ) && $wgUser->isAllowed('minoredit');
1283                 $bot = $wgUser->isAllowed( 'bot' ) || ( $flags & EDIT_FORCE_BOT );
1284
1285                 $oldtext = $this->getContent();
1286                 $oldsize = strlen( $oldtext );
1287
1288                 # Provide autosummaries if one is not provided.
1289                 if ($flags & EDIT_AUTOSUMMARY && $summary == '')
1290                         $summary = $this->getAutosummary( $oldtext, $text, $flags );
1291
1292                 $text = $this->preSaveTransform( $text );
1293                 $newsize = strlen( $text );
1294
1295                 $dbw =& wfGetDB( DB_MASTER );
1296                 $now = wfTimestampNow();
1297
1298                 if ( $flags & EDIT_UPDATE ) {
1299                         # Update article, but only if changed.
1300
1301                         # Make sure the revision is either completely inserted or not inserted at all
1302                         if( !$wgDBtransactions ) {
1303                                 $userAbort = ignore_user_abort( true );
1304                         }
1305
1306                         $lastRevision = 0;
1307                         $revisionId = 0;
1308
1309                         if ( 0 != strcmp( $text, $oldtext ) ) {
1310                                 $this->mGoodAdjustment = (int)$this->isCountable( $text )
1311                                   - (int)$this->isCountable( $oldtext );
1312                                 $this->mTotalAdjustment = 0;
1313
1314                                 $lastRevision = $dbw->selectField(
1315                                         'page', 'page_latest', array( 'page_id' => $this->getId() ) );
1316
1317                                 if ( !$lastRevision ) {
1318                                         # Article gone missing
1319                                         wfDebug( __METHOD__.": EDIT_UPDATE specified but article doesn't exist\n" );
1320                                         wfProfileOut( __METHOD__ );
1321                                         return false;
1322                                 }
1323
1324                                 $revision = new Revision( array(
1325                                         'page'       => $this->getId(),
1326                                         'comment'    => $summary,
1327                                         'minor_edit' => $isminor,
1328                                         'text'       => $text
1329                                         ) );
1330
1331                                 $dbw->begin();
1332                                 $revisionId = $revision->insertOn( $dbw );
1333
1334                                 # Update page
1335                                 $ok = $this->updateRevisionOn( $dbw, $revision, $lastRevision );
1336
1337                                 if( !$ok ) {
1338                                         /* Belated edit conflict! Run away!! */
1339                                         $good = false;
1340                                         $dbw->rollback();
1341                                 } else {
1342                                         # Update recentchanges
1343                                         if( !( $flags & EDIT_SUPPRESS_RC ) ) {
1344                                                 $rcid = RecentChange::notifyEdit( $now, $this->mTitle, $isminor, $wgUser, $summary,
1345                                                         $lastRevision, $this->getTimestamp(), $bot, '', $oldsize, $newsize,
1346                                                         $revisionId );
1347
1348                                                 # Mark as patrolled if the user can do so
1349                                                 if( $GLOBALS['wgUseRCPatrol'] && $wgUser->isAllowed( 'autopatrol' ) ) {
1350                                                         RecentChange::markPatrolled( $rcid );
1351                                                         PatrolLog::record( $rcid, true );
1352                                                 }
1353                                         }
1354                                         $wgUser->incEditCount();
1355                                         $dbw->commit();
1356                                 }
1357                         } else {
1358                                 // Keep the same revision ID, but do some updates on it
1359                                 $revisionId = $this->getRevIdFetched();
1360                                 // Update page_touched, this is usually implicit in the page update
1361                                 // Other cache updates are done in onArticleEdit()
1362                                 $this->mTitle->invalidateCache();
1363                         }
1364
1365                         if( !$wgDBtransactions ) {
1366                                 ignore_user_abort( $userAbort );
1367                         }
1368
1369                         if ( $good ) {
1370                                 # Invalidate cache of this article and all pages using this article
1371                                 # as a template. Partly deferred.
1372                                 Article::onArticleEdit( $this->mTitle );
1373
1374                                 # Update links tables, site stats, etc.
1375                                 $changed = ( strcmp( $oldtext, $text ) != 0 );
1376                                 $this->editUpdates( $text, $summary, $isminor, $now, $revisionId, $changed );
1377                         }
1378                 } else {
1379                         # Create new article
1380
1381                         # Set statistics members
1382                         # We work out if it's countable after PST to avoid counter drift
1383                         # when articles are created with {{subst:}}
1384                         $this->mGoodAdjustment = (int)$this->isCountable( $text );
1385                         $this->mTotalAdjustment = 1;
1386
1387                         $dbw->begin();
1388
1389                         # Add the page record; stake our claim on this title!
1390                         # This will fail with a database query exception if the article already exists
1391                         $newid = $this->insertOn( $dbw );
1392
1393                         # Save the revision text...
1394                         $revision = new Revision( array(
1395                                 'page'       => $newid,
1396                                 'comment'    => $summary,
1397                                 'minor_edit' => $isminor,
1398                                 'text'       => $text
1399                                 ) );
1400                         $revisionId = $revision->insertOn( $dbw );
1401
1402                         $this->mTitle->resetArticleID( $newid );
1403
1404                         # Update the page record with revision data
1405                         $this->updateRevisionOn( $dbw, $revision, 0 );
1406
1407                         if( !( $flags & EDIT_SUPPRESS_RC ) ) {
1408                                 $rcid = RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary, $bot,
1409                                   '', strlen( $text ), $revisionId );
1410                                 # Mark as patrolled if the user can
1411                                 if( $GLOBALS['wgUseRCPatrol'] && $wgUser->isAllowed( 'autopatrol' ) ) {
1412                                         RecentChange::markPatrolled( $rcid );
1413                                         PatrolLog::record( $rcid, true );
1414                                 }
1415                         }
1416                         $wgUser->incEditCount();
1417                         $dbw->commit();
1418
1419                         # Update links, etc.
1420                         $this->editUpdates( $text, $summary, $isminor, $now, $revisionId, true );
1421
1422                         # Clear caches
1423                         Article::onArticleCreate( $this->mTitle );
1424
1425                         wfRunHooks( 'ArticleInsertComplete', array( &$this, &$wgUser, $text,
1426                                 $summary, $flags & EDIT_MINOR,
1427                                 null, null, &$flags ) );
1428                 }
1429
1430                 if ( $good && !( $flags & EDIT_DEFER_UPDATES ) ) {
1431                         wfDoUpdates();
1432                 }
1433
1434                 wfRunHooks( 'ArticleSaveComplete',
1435                         array( &$this, &$wgUser, $text,
1436                         $summary, $flags & EDIT_MINOR,
1437                         null, null, &$flags ) );
1438
1439                 wfProfileOut( __METHOD__ );
1440                 return $good;
1441         }
1442
1443         /**
1444          * @deprecated wrapper for doRedirect
1445          */
1446         function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid ) {
1447                 $this->doRedirect( $this->isRedirect( $text ), $sectionanchor );
1448         }
1449
1450         /**
1451          * Output a redirect back to the article.
1452          * This is typically used after an edit.
1453          *
1454          * @param boolean $noRedir Add redirect=no
1455          * @param string $sectionAnchor section to redirect to, including "#"
1456          */
1457         function doRedirect( $noRedir = false, $sectionAnchor = '' ) {
1458                 global $wgOut;
1459                 if ( $noRedir ) {
1460                         $query = 'redirect=no';
1461                 } else {
1462                         $query = '';
1463                 }
1464                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $sectionAnchor );
1465         }
1466
1467         /**
1468          * Mark this particular edit as patrolled
1469          */
1470         function markpatrolled() {
1471                 global $wgOut, $wgRequest, $wgUseRCPatrol, $wgUser;
1472                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1473
1474                 # Check RC patrol config. option
1475                 if( !$wgUseRCPatrol ) {
1476                         $wgOut->errorPage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1477                         return;
1478                 }
1479
1480                 # Check permissions
1481                 if( !$wgUser->isAllowed( 'patrol' ) ) {
1482                         $wgOut->permissionRequired( 'patrol' );
1483                         return;
1484                 }
1485
1486                 # If we haven't been given an rc_id value, we can't do anything
1487                 $rcid = $wgRequest->getVal( 'rcid' );
1488                 if( !$rcid ) {
1489                         $wgOut->errorPage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1490                         return;
1491                 }
1492
1493                 # Handle the 'MarkPatrolled' hook
1494                 if( !wfRunHooks( 'MarkPatrolled', array( $rcid, &$wgUser, false ) ) ) {
1495                         return;
1496                 }
1497
1498                 $return = SpecialPage::getTitleFor( 'Recentchanges' );
1499                 # If it's left up to us, check that the user is allowed to patrol this edit
1500                 # If the user has the "autopatrol" right, then we'll assume there are no
1501                 # other conditions stopping them doing so
1502                 if( !$wgUser->isAllowed( 'autopatrol' ) ) {
1503                         $rc = RecentChange::newFromId( $rcid );
1504                         # Graceful error handling, as we've done before here...
1505                         # (If the recent change doesn't exist, then it doesn't matter whether
1506                         # the user is allowed to patrol it or not; nothing is going to happen
1507                         if( is_object( $rc ) && $wgUser->getName() == $rc->getAttribute( 'rc_user_text' ) ) {
1508                                 # The user made this edit, and can't patrol it
1509                                 # Tell them so, and then back off
1510                                 $wgOut->setPageTitle( wfMsg( 'markedaspatrollederror' ) );
1511                                 $wgOut->addWikiText( wfMsgNoTrans( 'markedaspatrollederror-noautopatrol' ) );
1512                                 $wgOut->returnToMain( false, $return );
1513                                 return;
1514                         }
1515                 }
1516
1517                 # Mark the edit as patrolled
1518                 RecentChange::markPatrolled( $rcid );
1519                 PatrolLog::record( $rcid );
1520                 wfRunHooks( 'MarkPatrolledComplete', array( &$rcid, &$wgUser, false ) );
1521
1522                 # Inform the user
1523                 $wgOut->setPageTitle( wfMsg( 'markedaspatrolled' ) );
1524                 $wgOut->addWikiText( wfMsgNoTrans( 'markedaspatrolledtext' ) );
1525                 $wgOut->returnToMain( false, $return );
1526         }
1527
1528         /**
1529          * User-interface handler for the "watch" action
1530          */
1531
1532         function watch() {
1533
1534                 global $wgUser, $wgOut;
1535
1536                 if ( $wgUser->isAnon() ) {
1537                         $wgOut->showErrorPage( 'watchnologin', 'watchnologintext' );
1538                         return;
1539                 }
1540                 if ( wfReadOnly() ) {
1541                         $wgOut->readOnlyPage();
1542                         return;
1543                 }
1544
1545                 if( $this->doWatch() ) {
1546                         $wgOut->setPagetitle( wfMsg( 'addedwatch' ) );
1547                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
1548
1549                         $link = wfEscapeWikiText( $this->mTitle->getPrefixedText() );
1550                         $text = wfMsg( 'addedwatchtext', $link );
1551                         $wgOut->addWikiText( $text );
1552                 }
1553
1554                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1555         }
1556
1557         /**
1558          * Add this page to $wgUser's watchlist
1559          * @return bool true on successful watch operation
1560          */
1561         function doWatch() {
1562                 global $wgUser;
1563                 if( $wgUser->isAnon() ) {
1564                         return false;
1565                 }
1566
1567                 if (wfRunHooks('WatchArticle', array(&$wgUser, &$this))) {
1568                         $wgUser->addWatch( $this->mTitle );
1569
1570                         return wfRunHooks('WatchArticleComplete', array(&$wgUser, &$this));
1571                 }
1572
1573                 return false;
1574         }
1575
1576         /**
1577          * User interface handler for the "unwatch" action.
1578          */
1579         function unwatch() {
1580
1581                 global $wgUser, $wgOut;
1582
1583                 if ( $wgUser->isAnon() ) {
1584                         $wgOut->showErrorPage( 'watchnologin', 'watchnologintext' );
1585                         return;
1586                 }
1587                 if ( wfReadOnly() ) {
1588                         $wgOut->readOnlyPage();
1589                         return;
1590                 }
1591
1592                 if( $this->doUnwatch() ) {
1593                         $wgOut->setPagetitle( wfMsg( 'removedwatch' ) );
1594                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
1595
1596                         $link = wfEscapeWikiText( $this->mTitle->getPrefixedText() );
1597                         $text = wfMsg( 'removedwatchtext', $link );
1598                         $wgOut->addWikiText( $text );
1599                 }
1600
1601                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1602         }
1603
1604         /**
1605          * Stop watching a page
1606          * @return bool true on successful unwatch
1607          */
1608         function doUnwatch() {
1609                 global $wgUser;
1610                 if( $wgUser->isAnon() ) {
1611                         return false;
1612                 }
1613
1614                 if (wfRunHooks('UnwatchArticle', array(&$wgUser, &$this))) {
1615                         $wgUser->removeWatch( $this->mTitle );
1616
1617                         return wfRunHooks('UnwatchArticleComplete', array(&$wgUser, &$this));
1618                 }
1619
1620                 return false;
1621         }
1622
1623         /**
1624          * action=protect handler
1625          */
1626         function protect() {
1627                 $form = new ProtectionForm( $this );
1628                 $form->show();
1629         }
1630
1631         /**
1632          * action=unprotect handler (alias)
1633          */
1634         function unprotect() {
1635                 $this->protect();
1636         }
1637
1638         /**
1639          * Update the article's restriction field, and leave a log entry.
1640          *
1641          * @param array $limit set of restriction keys
1642          * @param string $reason
1643          * @return bool true on success
1644          */
1645         function updateRestrictions( $limit = array(), $reason = '', $cascade = 0 ) {
1646                 global $wgUser, $wgRestrictionTypes, $wgContLang;
1647
1648                 $id = $this->mTitle->getArticleID();
1649                 if( !$wgUser->isAllowed( 'protect' ) || wfReadOnly() || $id == 0 ) {
1650                         return false;
1651                 }
1652
1653                 if (!$cascade) {
1654                         $cascade = false;
1655                 }
1656
1657                 # FIXME: Same limitations as described in ProtectionForm.php (line 37);
1658                 # we expect a single selection, but the schema allows otherwise.
1659                 $current = array();
1660                 foreach( $wgRestrictionTypes as $action )
1661                         $current[$action] = implode( '', $this->mTitle->getRestrictions( $action ) );
1662
1663                 $current = Article::flattenRestrictions( $current );
1664                 $updated = Article::flattenRestrictions( $limit );
1665
1666                 $changed = ( $current != $updated );
1667                 $changed = $changed || ($this->mTitle->areRestrictionsCascading() != $cascade);
1668                 $protect = ( $updated != '' );
1669
1670                 # If nothing's changed, do nothing
1671                 if( $changed ) {
1672                         if( wfRunHooks( 'ArticleProtect', array( &$this, &$wgUser, $limit, $reason ) ) ) {
1673
1674                                 $dbw =& wfGetDB( DB_MASTER );
1675
1676                                 # Prepare a null revision to be added to the history
1677                                 $comment = $wgContLang->ucfirst( wfMsgForContent( $protect ? 'protectedarticle' : 'unprotectedarticle', $this->mTitle->getPrefixedText() ) );
1678                                 if( $reason )
1679                                         $comment .= ": $reason";
1680                                 if( $protect )
1681                                         $comment .= " [$updated]";
1682                                 $nullRevision = Revision::newNullRevision( $dbw, $id, $comment, true );
1683                                 $nullRevId = $nullRevision->insertOn( $dbw );
1684
1685                                 # Update restrictions table
1686                                 foreach( $limit as $action => $restrictions ) {
1687                                         if ($restrictions != '' ) {
1688                                                 $dbw->replace( 'page_restrictions', array( 'pr_pagetype'),
1689                                                         array( 'pr_page' => $id, 'pr_type' => $action
1690                                                                 , 'pr_level' => $restrictions, 'pr_cascade' => $cascade ? 1 : 0 ), __METHOD__  );
1691                                         } else {
1692                                                 $dbw->delete( 'page_restrictions', array( 'pr_page' => $id,
1693                                                         'pr_type' => $action ), __METHOD__ );
1694                                         }
1695                                 }
1696
1697                                 # Update page record
1698                                 $dbw->update( 'page',
1699                                         array( /* SET */
1700                                                 'page_touched' => $dbw->timestamp(),
1701                                                 'page_restrictions' => '',
1702                                                 'page_latest' => $nullRevId
1703                                         ), array( /* WHERE */
1704                                                 'page_id' => $id
1705                                         ), 'Article::protect'
1706                                 );
1707                                 wfRunHooks( 'ArticleProtectComplete', array( &$this, &$wgUser, $limit, $reason ) );
1708
1709                                 # Update the protection log
1710                                 $log = new LogPage( 'protect' );
1711
1712                                 $cascade_description = '';
1713
1714                                 if ($cascade) {
1715                                         $cascade_description = ' ['.wfMsg('protect-summary-cascade').']';
1716                                 }
1717
1718                                 if( $protect ) {
1719                                         $log->addEntry( 'protect', $this->mTitle, trim( $reason . " [$updated]$cascade_description" ) );
1720                                 } else {
1721                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1722                                 }
1723
1724                         } # End hook
1725                 } # End "changed" check
1726
1727                 return true;
1728         }
1729
1730         /**
1731          * Take an array of page restrictions and flatten it to a string
1732          * suitable for insertion into the page_restrictions field.
1733          * @param array $limit
1734          * @return string
1735          * @private
1736          */
1737         function flattenRestrictions( $limit ) {
1738                 if( !is_array( $limit ) ) {
1739                         throw new MWException( 'Article::flattenRestrictions given non-array restriction set' );
1740                 }
1741                 $bits = array();
1742                 ksort( $limit );
1743                 foreach( $limit as $action => $restrictions ) {
1744                         if( $restrictions != '' ) {
1745                                 $bits[] = "$action=$restrictions";
1746                         }
1747                 }
1748                 return implode( ':', $bits );
1749         }
1750
1751         /*
1752          * UI entry point for page deletion
1753          */
1754         function delete() {
1755                 global $wgUser, $wgOut, $wgRequest;
1756                 $confirm = $wgRequest->wasPosted() &&
1757                         $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
1758                 $reason = $wgRequest->getText( 'wpReason' );
1759
1760                 # This code desperately needs to be totally rewritten
1761
1762                 # Check permissions
1763                 if( $wgUser->isAllowed( 'delete' ) ) {
1764                         if( $wgUser->isBlocked( !$confirm ) ) {
1765                                 $wgOut->blockedPage();
1766                                 return;
1767                         }
1768                 } else {
1769                         $wgOut->permissionRequired( 'delete' );
1770                         return;
1771                 }
1772
1773                 if( wfReadOnly() ) {
1774                         $wgOut->readOnlyPage();
1775                         return;
1776                 }
1777
1778                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1779
1780                 # Better double-check that it hasn't been deleted yet!
1781                 $dbw =& wfGetDB( DB_MASTER );
1782                 $conds = $this->mTitle->pageCond();
1783                 $latest = $dbw->selectField( 'page', 'page_latest', $conds, __METHOD__ );
1784                 if ( $latest === false ) {
1785                         $wgOut->showFatalError( wfMsg( 'cannotdelete' ) );
1786                         return;
1787                 }
1788
1789                 if( $confirm ) {
1790                         $this->doDelete( $reason );
1791                         if( $wgRequest->getCheck( 'wpWatch' ) ) {
1792                                 $this->doWatch();
1793                         } elseif( $this->mTitle->userIsWatching() ) {
1794                                 $this->doUnwatch();
1795                         }
1796                         return;
1797                 }
1798
1799                 # determine whether this page has earlier revisions
1800                 # and insert a warning if it does
1801                 $maxRevisions = 20;
1802                 $authors = $this->getLastNAuthors( $maxRevisions, $latest );
1803
1804                 if( count( $authors ) > 1 && !$confirm ) {
1805                         $skin=$wgUser->getSkin();
1806                         $wgOut->addHTML( '<strong>' . wfMsg( 'historywarning' ) . ' ' . $skin->historyLink() . '</strong>' );
1807                 }
1808
1809                 # If a single user is responsible for all revisions, find out who they are
1810                 if ( count( $authors ) == $maxRevisions ) {
1811                         // Query bailed out, too many revisions to find out if they're all the same
1812                         $authorOfAll = false;
1813                 } else {
1814                         $authorOfAll = reset( $authors );
1815                         foreach ( $authors as $author ) {
1816                                 if ( $authorOfAll != $author ) {
1817                                         $authorOfAll = false;
1818                                         break;
1819                                 }
1820                         }
1821                 }
1822                 # Fetch article text
1823                 $rev = Revision::newFromTitle( $this->mTitle );
1824
1825                 if( !is_null( $rev ) ) {
1826                         # if this is a mini-text, we can paste part of it into the deletion reason
1827                         $text = $rev->getText();
1828
1829                         #if this is empty, an earlier revision may contain "useful" text
1830                         $blanked = false;
1831                         if( $text == '' ) {
1832                                 $prev = $rev->getPrevious();
1833                                 if( $prev ) {
1834                                         $text = $prev->getText();
1835                                         $blanked = true;
1836                                 }
1837                         }
1838
1839                         $length = strlen( $text );
1840
1841                         # this should not happen, since it is not possible to store an empty, new
1842                         # page. Let's insert a standard text in case it does, though
1843                         if( $length == 0 && $reason === '' ) {
1844                                 $reason = wfMsgForContent( 'exblank' );
1845                         }
1846
1847                         if( $length < 500 && $reason === '' ) {
1848                                 # comment field=255, let's grep the first 150 to have some user
1849                                 # space left
1850                                 global $wgContLang;
1851                                 $text = $wgContLang->truncate( $text, 150, '...' );
1852
1853                                 # let's strip out newlines
1854                                 $text = preg_replace( "/[\n\r]/", '', $text );
1855
1856                                 if( !$blanked ) {
1857                                         if( $authorOfAll === false ) {
1858                                                 $reason = wfMsgForContent( 'excontent', $text );
1859                                         } else {
1860                                                 $reason = wfMsgForContent( 'excontentauthor', $text, $authorOfAll );
1861                                         }
1862                                 } else {
1863                                         $reason = wfMsgForContent( 'exbeforeblank', $text );
1864                                 }
1865                         }
1866                 }
1867
1868                 return $this->confirmDelete( '', $reason );
1869         }
1870
1871         /**
1872          * Get the last N authors
1873          * @param int $num Number of revisions to get
1874          * @param string $revLatest The latest rev_id, selected from the master (optional)
1875          * @return array Array of authors, duplicates not removed
1876          */
1877         function getLastNAuthors( $num, $revLatest = 0 ) {
1878                 wfProfileIn( __METHOD__ );
1879
1880                 // First try the slave
1881                 // If that doesn't have the latest revision, try the master
1882                 $continue = 2;
1883                 $db =& wfGetDB( DB_SLAVE );
1884                 do {
1885                         $res = $db->select( array( 'page', 'revision' ),
1886                                 array( 'rev_id', 'rev_user_text' ),
1887                                 array(
1888                                         'page_namespace' => $this->mTitle->getNamespace(),
1889                                         'page_title' => $this->mTitle->getDBkey(),
1890                                         'rev_page = page_id'
1891                                 ), __METHOD__, $this->getSelectOptions( array(
1892                                         'ORDER BY' => 'rev_timestamp DESC',
1893                                         'LIMIT' => $num
1894                                 ) )
1895                         );
1896                         if ( !$res ) {
1897                                 wfProfileOut( __METHOD__ );
1898                                 return array();
1899                         }
1900                         $row = $db->fetchObject( $res );
1901                         if ( $continue == 2 && $revLatest && $row->rev_id != $revLatest ) {
1902                                 $db =& wfGetDB( DB_MASTER );
1903                                 $continue--;
1904                         } else {
1905                                 $continue = 0;
1906                         }
1907                 } while ( $continue );
1908
1909                 $authors = array( $row->rev_user_text );
1910                 while ( $row = $db->fetchObject( $res ) ) {
1911                         $authors[] = $row->rev_user_text;
1912                 }
1913                 wfProfileOut( __METHOD__ );
1914                 return $authors;
1915         }
1916
1917         /**
1918          * Output deletion confirmation dialog
1919          */
1920         function confirmDelete( $par, $reason ) {
1921                 global $wgOut, $wgUser;
1922
1923                 wfDebug( "Article::confirmDelete\n" );
1924
1925                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1926                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1927                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1928                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1929
1930                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1931
1932                 $confirm = htmlspecialchars( wfMsg( 'deletepage' ) );
1933                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1934                 $token = htmlspecialchars( $wgUser->editToken() );
1935                 $watch = Xml::checkLabel( wfMsg( 'watchthis' ), 'wpWatch', 'wpWatch', $wgUser->getBoolOption( 'watchdeletion' ) || $this->mTitle->userIsWatching(), array( 'tabindex' => '2' ) );
1936
1937                 $wgOut->addHTML( "
1938 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1939         <table border='0'>
1940                 <tr>
1941                         <td align='right'>
1942                                 <label for='wpReason'>{$delcom}:</label>
1943                         </td>
1944                         <td align='left'>
1945                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" tabindex=\"1\" />
1946                         </td>
1947                 </tr>
1948                 <tr>
1949                         <td>&nbsp;</td>
1950                         <td>$watch</td>
1951                 </tr>
1952                 <tr>
1953                         <td>&nbsp;</td>
1954                         <td>
1955                                 <input type='submit' name='wpConfirmB' id='wpConfirmB' value=\"{$confirm}\" tabindex=\"3\" />
1956                         </td>
1957                 </tr>
1958         </table>
1959         <input type='hidden' name='wpEditToken' value=\"{$token}\" />
1960 </form>\n" );
1961
1962                 $wgOut->returnToMain( false );
1963         }
1964
1965
1966         /**
1967          * Perform a deletion and output success or failure messages
1968          */
1969         function doDelete( $reason ) {
1970                 global $wgOut, $wgUser;
1971                 wfDebug( __METHOD__."\n" );
1972
1973                 if (wfRunHooks('ArticleDelete', array(&$this, &$wgUser, &$reason))) {
1974                         if ( $this->doDeleteArticle( $reason ) ) {
1975                                 $deleted = wfEscapeWikiText( $this->mTitle->getPrefixedText() );
1976
1977                                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1978                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1979
1980                                 $loglink = '[[Special:Log/delete|' . wfMsg( 'deletionlog' ) . ']]';
1981                                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
1982
1983                                 $wgOut->addWikiText( $text );
1984                                 $wgOut->returnToMain( false );
1985                                 wfRunHooks('ArticleDeleteComplete', array(&$this, &$wgUser, $reason));
1986                         } else {
1987                                 $wgOut->showFatalError( wfMsg( 'cannotdelete' ) );
1988                         }
1989                 }
1990         }
1991
1992         /**
1993          * Back-end article deletion
1994          * Deletes the article with database consistency, writes logs, purges caches
1995          * Returns success
1996          */
1997         function doDeleteArticle( $reason ) {
1998                 global $wgUseSquid, $wgDeferredUpdateList;
1999                 global $wgUseTrackbacks;
2000
2001                 wfDebug( __METHOD__."\n" );
2002
2003                 $dbw =& wfGetDB( DB_MASTER );
2004                 $ns = $this->mTitle->getNamespace();
2005                 $t = $this->mTitle->getDBkey();
2006                 $id = $this->mTitle->getArticleID();
2007
2008                 if ( $t == '' || $id == 0 ) {
2009                         return false;
2010                 }
2011
2012                 $u = new SiteStatsUpdate( 0, 1, -(int)$this->isCountable( $this->getContent() ), -1 );
2013                 array_push( $wgDeferredUpdateList, $u );
2014
2015                 // For now, shunt the revision data into the archive table.
2016                 // Text is *not* removed from the text table; bulk storage
2017                 // is left intact to avoid breaking block-compression or
2018                 // immutable storage schemes.
2019                 //
2020                 // For backwards compatibility, note that some older archive
2021                 // table entries will have ar_text and ar_flags fields still.
2022                 //
2023                 // In the future, we may keep revisions and mark them with
2024                 // the rev_deleted field, which is reserved for this purpose.
2025                 $dbw->insertSelect( 'archive', array( 'page', 'revision' ),
2026                         array(
2027                                 'ar_namespace'  => 'page_namespace',
2028                                 'ar_title'      => 'page_title',
2029                                 'ar_comment'    => 'rev_comment',
2030                                 'ar_user'       => 'rev_user',
2031                                 'ar_user_text'  => 'rev_user_text',
2032                                 'ar_timestamp'  => 'rev_timestamp',
2033                                 'ar_minor_edit' => 'rev_minor_edit',
2034                                 'ar_rev_id'     => 'rev_id',
2035                                 'ar_text_id'    => 'rev_text_id',
2036                                 'ar_text'       => '\'\'', // Be explicit to appease
2037                                 'ar_flags'      => '\'\'', // MySQL's "strict mode"...
2038                         ), array(
2039                                 'page_id' => $id,
2040                                 'page_id = rev_page'
2041                         ), __METHOD__
2042                 );
2043
2044                 # Delete restrictions for it
2045                 $dbw->delete( 'page_restrictions', array ( 'pr_page' => $id ), __METHOD__ );
2046
2047                 # Now that it's safely backed up, delete it
2048                 $dbw->delete( 'page', array( 'page_id' => $id ), __METHOD__);
2049
2050                 # If using cascading deletes, we can skip some explicit deletes
2051                 if ( !$dbw->cascadingDeletes() ) {
2052
2053                         $dbw->delete( 'revision', array( 'rev_page' => $id ), __METHOD__ );
2054
2055                         if ($wgUseTrackbacks)
2056                                 $dbw->delete( 'trackbacks', array( 'tb_page' => $id ), __METHOD__ );
2057
2058                         # Delete outgoing links
2059                         $dbw->delete( 'pagelinks', array( 'pl_from' => $id ) );
2060                         $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
2061                         $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
2062                         $dbw->delete( 'templatelinks', array( 'tl_from' => $id ) );
2063                         $dbw->delete( 'externallinks', array( 'el_from' => $id ) );
2064                         $dbw->delete( 'langlinks', array( 'll_from' => $id ) );
2065                         $dbw->delete( 'redirect', array( 'rd_from' => $id ) );
2066                 }
2067
2068                 # If using cleanup triggers, we can skip some manual deletes
2069                 if ( !$dbw->cleanupTriggers() ) {
2070
2071                         # Clean up recentchanges entries...
2072                         $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), __METHOD__ );
2073                 }
2074
2075                 # Clear caches
2076                 Article::onArticleDelete( $this->mTitle );
2077
2078                 # Log the deletion
2079                 $log = new LogPage( 'delete' );
2080                 $log->addEntry( 'delete', $this->mTitle, $reason );
2081
2082                 # Clear the cached article id so the interface doesn't act like we exist
2083                 $this->mTitle->resetArticleID( 0 );
2084                 $this->mTitle->mArticleID = 0;
2085                 return true;
2086         }
2087
2088         /**
2089          * Revert a modification
2090          */
2091         function rollback() {
2092                 global $wgUser, $wgOut, $wgRequest, $wgUseRCPatrol;
2093
2094                 if( $wgUser->isAllowed( 'rollback' ) ) {
2095                         if( $wgUser->isBlocked() ) {
2096                                 $wgOut->blockedPage();
2097                                 return;
2098                         }
2099                 } else {
2100                         $wgOut->permissionRequired( 'rollback' );
2101                         return;
2102                 }
2103
2104                 if ( wfReadOnly() ) {
2105                         $wgOut->readOnlyPage( $this->getContent() );
2106                         return;
2107                 }
2108                 if( !$wgUser->matchEditToken( $wgRequest->getVal( 'token' ),
2109                         array( $this->mTitle->getPrefixedText(),
2110                                 $wgRequest->getVal( 'from' ) )  ) ) {
2111                         $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
2112                         $wgOut->addWikiText( wfMsg( 'sessionfailure' ) );
2113                         return;
2114                 }
2115                 $dbw =& wfGetDB( DB_MASTER );
2116
2117                 # Enhanced rollback, marks edits rc_bot=1
2118                 $bot = $wgRequest->getBool( 'bot' );
2119
2120                 # Replace all this user's current edits with the next one down
2121
2122                 # Get the last editor
2123                 $current = Revision::newFromTitle( $this->mTitle );
2124                 if( is_null( $current ) ) {
2125                         # Something wrong... no page?
2126                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
2127                         return;
2128                 }
2129
2130                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
2131                 if( $from != $current->getUserText() ) {
2132                         $wgOut->setPageTitle( wfMsg('rollbackfailed') );
2133                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
2134                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
2135                                 htmlspecialchars( $from ),
2136                                 htmlspecialchars( $current->getUserText() ) ) );
2137                         if( $current->getComment() != '') {
2138                                 $wgOut->addHTML(
2139                                         wfMsg( 'editcomment',
2140                                         htmlspecialchars( $current->getComment() ) ) );
2141                         }
2142                         return;
2143                 }
2144
2145                 # Get the last edit not by this guy
2146                 $user = intval( $current->getUser() );
2147                 $user_text = $dbw->addQuotes( $current->getUserText() );
2148                 $s = $dbw->selectRow( 'revision',
2149                         array( 'rev_id', 'rev_timestamp' ),
2150                         array(
2151                                 'rev_page' => $current->getPage(),
2152                                 "rev_user <> {$user} OR rev_user_text <> {$user_text}"
2153                         ), __METHOD__,
2154                         array(
2155                                 'USE INDEX' => 'page_timestamp',
2156                                 'ORDER BY'  => 'rev_timestamp DESC' )
2157                         );
2158                 if( $s === false ) {
2159                         # Something wrong
2160                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
2161                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
2162                         return;
2163                 }
2164
2165                 $set = array();
2166                 if ( $bot ) {
2167                         # Mark all reverted edits as bot
2168                         $set['rc_bot'] = 1;
2169                 }
2170                 if ( $wgUseRCPatrol ) {
2171                         # Mark all reverted edits as patrolled
2172                         $set['rc_patrolled'] = 1;
2173                 }
2174
2175                 if ( $set ) {
2176                         $dbw->update( 'recentchanges', $set,
2177                                 array( /* WHERE */
2178                                         'rc_cur_id'    => $current->getPage(),
2179                                         'rc_user_text' => $current->getUserText(),
2180                                         "rc_timestamp > '{$s->rev_timestamp}'",
2181                                 ), __METHOD__
2182                         );
2183                 }
2184
2185                 # Get the edit summary
2186                 $target = Revision::newFromId( $s->rev_id );
2187                 $newComment = wfMsgForContent( 'revertpage', $target->getUserText(), $from );
2188                 $newComment = $wgRequest->getText( 'summary', $newComment );
2189
2190                 # Save it!
2191                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
2192                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
2193                 $wgOut->addHTML( '<h2>' . htmlspecialchars( $newComment ) . "</h2>\n<hr />\n" );
2194
2195                 $this->updateArticle( $target->getText(), $newComment, 1, $this->mTitle->userIsWatching(), $bot );
2196
2197                 $wgOut->returnToMain( false );
2198         }
2199
2200
2201         /**
2202          * Do standard deferred updates after page view
2203          * @private
2204          */
2205         function viewUpdates() {
2206                 global $wgDeferredUpdateList;
2207
2208                 if ( 0 != $this->getID() ) {
2209                         global $wgDisableCounters;
2210                         if( !$wgDisableCounters ) {
2211                                 Article::incViewCount( $this->getID() );
2212                                 $u = new SiteStatsUpdate( 1, 0, 0 );
2213                                 array_push( $wgDeferredUpdateList, $u );
2214                         }
2215                 }
2216
2217                 # Update newtalk / watchlist notification status
2218                 global $wgUser;
2219                 $wgUser->clearNotification( $this->mTitle );
2220         }
2221
2222         /**
2223          * Do standard deferred updates after page edit.
2224          * Update links tables, site stats, search index and message cache.
2225          * Every 1000th edit, prune the recent changes table.
2226          *
2227          * @private
2228          * @param $text New text of the article
2229          * @param $summary Edit summary
2230          * @param $minoredit Minor edit
2231          * @param $timestamp_of_pagechange Timestamp associated with the page change
2232          * @param $newid rev_id value of the new revision
2233          * @param $changed Whether or not the content actually changed
2234          */
2235         function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange, $newid, $changed = true ) {
2236                 global $wgDeferredUpdateList, $wgMessageCache, $wgUser, $wgParser;
2237
2238                 wfProfileIn( __METHOD__ );
2239
2240                 # Parse the text
2241                 $options = new ParserOptions;
2242                 $options->setTidy(true);
2243                 $poutput = $wgParser->parse( $text, $this->mTitle, $options, true, true, $newid );
2244
2245                 # Save it to the parser cache
2246                 $parserCache =& ParserCache::singleton();
2247                 $parserCache->save( $poutput, $this, $wgUser );
2248
2249                 # Update the links tables
2250                 $u = new LinksUpdate( $this->mTitle, $poutput );
2251                 $u->doUpdate();
2252
2253                 if ( wfRunHooks( 'ArticleEditUpdatesDeleteFromRecentchanges', array( &$this ) ) ) {
2254                         wfSeedRandom();
2255                         if ( 0 == mt_rand( 0, 999 ) ) {
2256                                 # Periodically flush old entries from the recentchanges table.
2257                                 global $wgRCMaxAge;
2258
2259                                 $dbw =& wfGetDB( DB_MASTER );
2260                                 $cutoff = $dbw->timestamp( time() - $wgRCMaxAge );
2261                                 $recentchanges = $dbw->tableName( 'recentchanges' );
2262                                 $sql = "DELETE FROM $recentchanges WHERE rc_timestamp < '{$cutoff}'";
2263                                 $dbw->query( $sql );
2264                         }
2265                 }
2266
2267                 $id = $this->getID();
2268                 $title = $this->mTitle->getPrefixedDBkey();
2269                 $shortTitle = $this->mTitle->getDBkey();
2270
2271                 if ( 0 == $id ) {
2272                         wfProfileOut( __METHOD__ );
2273                         return;
2274                 }
2275
2276                 $u = new SiteStatsUpdate( 0, 1, $this->mGoodAdjustment, $this->mTotalAdjustment );
2277                 array_push( $wgDeferredUpdateList, $u );
2278                 $u = new SearchUpdate( $id, $title, $text );
2279                 array_push( $wgDeferredUpdateList, $u );
2280
2281                 # If this is another user's talk page, update newtalk
2282                 # Don't do this if $changed = false otherwise some idiot can null-edit a
2283                 # load of user talk pages and piss people off, nor if it's a minor edit
2284                 # by a properly-flagged bot.
2285                 if( $this->mTitle->getNamespace() == NS_USER_TALK && $shortTitle != $wgUser->getTitleKey() && $changed
2286                         && !($minoredit && $wgUser->isAllowed('nominornewtalk') ) ) {
2287                         if (wfRunHooks('ArticleEditUpdateNewTalk', array(&$this)) ) {
2288                                 $other = User::newFromName( $shortTitle );
2289                                 if( is_null( $other ) && User::isIP( $shortTitle ) ) {
2290                                         // An anonymous user
2291                                         $other = new User();
2292                                         $other->setName( $shortTitle );
2293                                 }
2294                                 if( $other ) {
2295                                         $other->setNewtalk( true );
2296                                 }
2297                         }
2298                 }
2299
2300                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
2301                         $wgMessageCache->replace( $shortTitle, $text );
2302                 }
2303
2304                 wfProfileOut( __METHOD__ );
2305         }
2306
2307         /**
2308          * Perform article updates on a special page creation.
2309          *
2310          * @param Revision $rev
2311          *
2312          * @fixme This is a shitty interface function. Kill it and replace the
2313          * other shitty functions like editUpdates and such so it's not needed
2314          * anymore.
2315          */
2316         function createUpdates( $rev ) {
2317                 $this->mGoodAdjustment = $this->isCountable( $rev->getText() );
2318                 $this->mTotalAdjustment = 1;
2319                 $this->editUpdates( $rev->getText(), $rev->getComment(),
2320                         $rev->isMinor(), wfTimestamp(), $rev->getId(), true );
2321         }
2322
2323         /**
2324          * Generate the navigation links when browsing through an article revisions
2325          * It shows the information as:
2326          *   Revision as of \<date\>; view current revision
2327          *   \<- Previous version | Next Version -\>
2328          *
2329          * @private
2330          * @param string $oldid         Revision ID of this article revision
2331          */
2332         function setOldSubtitle( $oldid=0 ) {
2333                 global $wgLang, $wgOut, $wgUser;
2334
2335                 if ( !wfRunHooks( 'DisplayOldSubtitle', array(&$this, &$oldid) ) ) {
2336                                 return;
2337                 }
2338
2339                 $revision = Revision::newFromId( $oldid );
2340
2341                 $current = ( $oldid == $this->mLatest );
2342                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
2343                 $sk = $wgUser->getSkin();
2344                 $lnk = $current
2345                         ? wfMsg( 'currentrevisionlink' )
2346                         : $lnk = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
2347                 $curdiff = $current
2348                         ? wfMsg( 'diff' )
2349                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'diff' ), 'diff=cur&oldid='.$oldid );
2350                 $prev = $this->mTitle->getPreviousRevisionID( $oldid ) ;
2351                 $prevlink = $prev
2352                         ? $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid )
2353                         : wfMsg( 'previousrevision' );
2354                 $prevdiff = $prev
2355                         ? $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'diff' ), 'diff=prev&oldid='.$oldid )
2356                         : wfMsg( 'diff' );
2357                 $nextlink = $current
2358                         ? wfMsg( 'nextrevision' )
2359                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
2360                 $nextdiff = $current
2361                         ? wfMsg( 'diff' )
2362                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'diff' ), 'diff=next&oldid='.$oldid );
2363
2364                 $userlinks = $sk->userLink( $revision->getUser(), $revision->getUserText() )
2365                                                 . $sk->userToolLinks( $revision->getUser(), $revision->getUserText() );
2366
2367                 $r = "\n\t\t\t\t<div id=\"mw-revision-info\">" . wfMsg( 'revision-info', $td, $userlinks ) . "</div>\n" .
2368                      "\n\t\t\t\t<div id=\"mw-revision-nav\">" . wfMsg( 'revision-nav', $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff ) . "</div>\n\t\t\t";
2369                 $wgOut->setSubtitle( $r );
2370         }
2371
2372         /**
2373          * This function is called right before saving the wikitext,
2374          * so we can do things like signatures and links-in-context.
2375          *
2376          * @param string $text
2377          */
2378         function preSaveTransform( $text ) {
2379                 global $wgParser, $wgUser;
2380                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
2381         }
2382
2383         /* Caching functions */
2384
2385         /**
2386          * checkLastModified returns true if it has taken care of all
2387          * output to the client that is necessary for this request.
2388          * (that is, it has sent a cached version of the page)
2389          */
2390         function tryFileCache() {
2391                 static $called = false;
2392                 if( $called ) {
2393                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
2394                         return;
2395                 }
2396                 $called = true;
2397                 if($this->isFileCacheable()) {
2398                         $touched = $this->mTouched;
2399                         $cache = new HTMLFileCache( $this->mTitle );
2400                         if($cache->isFileCacheGood( $touched )) {
2401                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
2402                                 $cache->loadFromFileCache();
2403                                 return true;
2404                         } else {
2405                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
2406                                 ob_start( array(&$cache, 'saveToFileCache' ) );
2407                         }
2408                 } else {
2409                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
2410                 }
2411         }
2412
2413         /**
2414          * Check if the page can be cached
2415          * @return bool
2416          */
2417         function isFileCacheable() {
2418                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
2419                 $action    = $wgRequest->getVal( 'action'    );
2420                 $oldid     = $wgRequest->getVal( 'oldid'     );
2421                 $diff      = $wgRequest->getVal( 'diff'      );
2422                 $redirect  = $wgRequest->getVal( 'redirect'  );
2423                 $printable = $wgRequest->getVal( 'printable' );
2424
2425                 return $wgUseFileCache
2426                         and (!$wgShowIPinHeader)
2427                         and ($this->getID() != 0)
2428                         and ($wgUser->isAnon())
2429                         and (!$wgUser->getNewtalk())
2430                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
2431                         and (empty( $action ) || $action == 'view')
2432                         and (!isset($oldid))
2433                         and (!isset($diff))
2434                         and (!isset($redirect))
2435                         and (!isset($printable))
2436                         and (!$this->mRedirectedFrom);
2437         }
2438
2439         /**
2440          * Loads page_touched and returns a value indicating if it should be used
2441          *
2442          */
2443         function checkTouched() {
2444                 if( !$this->mDataLoaded ) {
2445                         $this->loadPageData();
2446                 }
2447                 return !$this->mIsRedirect;
2448         }
2449
2450         /**
2451          * Get the page_touched field
2452          */
2453         function getTouched() {
2454                 # Ensure that page data has been loaded
2455                 if( !$this->mDataLoaded ) {
2456                         $this->loadPageData();
2457                 }
2458                 return $this->mTouched;
2459         }
2460
2461         /**
2462          * Get the page_latest field
2463          */
2464         function getLatest() {
2465                 if ( !$this->mDataLoaded ) {
2466                         $this->loadPageData();
2467                 }
2468                 return $this->mLatest;
2469         }
2470
2471         /**
2472          * Edit an article without doing all that other stuff
2473          * The article must already exist; link tables etc
2474          * are not updated, caches are not flushed.
2475          *
2476          * @param string $text text submitted
2477          * @param string $comment comment submitted
2478          * @param bool $minor whereas it's a minor modification
2479          */
2480         function quickEdit( $text, $comment = '', $minor = 0 ) {
2481                 wfProfileIn( __METHOD__ );
2482
2483                 $dbw =& wfGetDB( DB_MASTER );
2484                 $dbw->begin();
2485                 $revision = new Revision( array(
2486                         'page'       => $this->getId(),
2487                         'text'       => $text,
2488                         'comment'    => $comment,
2489                         'minor_edit' => $minor ? 1 : 0,
2490                         ) );
2491                 $revision->insertOn( $dbw );
2492                 $this->updateRevisionOn( $dbw, $revision );
2493                 $dbw->commit();
2494
2495                 wfProfileOut( __METHOD__ );
2496         }
2497
2498         /**
2499          * Used to increment the view counter
2500          *
2501          * @static
2502          * @param integer $id article id
2503          */
2504         function incViewCount( $id ) {
2505                 $id = intval( $id );
2506                 global $wgHitcounterUpdateFreq, $wgDBtype;
2507
2508                 $dbw =& wfGetDB( DB_MASTER );
2509                 $pageTable = $dbw->tableName( 'page' );
2510                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
2511                 $acchitsTable = $dbw->tableName( 'acchits' );
2512
2513                 if( $wgHitcounterUpdateFreq <= 1 ) {
2514                         $dbw->query( "UPDATE $pageTable SET page_counter = page_counter + 1 WHERE page_id = $id" );
2515                         return;
2516                 }
2517
2518                 # Not important enough to warrant an error page in case of failure
2519                 $oldignore = $dbw->ignoreErrors( true );
2520
2521                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2522
2523                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2524                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2525                         # Most of the time (or on SQL errors), skip row count check
2526                         $dbw->ignoreErrors( $oldignore );
2527                         return;
2528                 }
2529
2530                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2531                 $row = $dbw->fetchObject( $res );
2532                 $rown = intval( $row->n );
2533                 if( $rown >= $wgHitcounterUpdateFreq ){
2534                         wfProfileIn( 'Article::incViewCount-collect' );
2535                         $old_user_abort = ignore_user_abort( true );
2536
2537                         if ($wgDBtype == 'mysql')
2538                                 $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2539                         $tabletype = $wgDBtype == 'mysql' ? "ENGINE=HEAP " : '';
2540                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable $tabletype AS ".
2541                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2542                                 'GROUP BY hc_id');
2543                         $dbw->query("DELETE FROM $hitcounterTable");
2544                         if ($wgDBtype == 'mysql') {
2545                                 $dbw->query('UNLOCK TABLES');
2546                                 $dbw->query("UPDATE $pageTable,$acchitsTable SET page_counter=page_counter + hc_n ".
2547                                         'WHERE page_id = hc_id');
2548                         }
2549                         else {
2550                                 $dbw->query("UPDATE $pageTable SET page_counter=page_counter + hc_n ".
2551                                         "FROM $acchitsTable WHERE page_id = hc_id");
2552                         }
2553                         $dbw->query("DROP TABLE $acchitsTable");
2554
2555                         ignore_user_abort( $old_user_abort );
2556                         wfProfileOut( 'Article::incViewCount-collect' );
2557                 }
2558                 $dbw->ignoreErrors( $oldignore );
2559         }
2560
2561         /**#@+
2562          * The onArticle*() functions are supposed to be a kind of hooks
2563          * which should be called whenever any of the specified actions
2564          * are done.
2565          *
2566          * This is a good place to put code to clear caches, for instance.
2567          *
2568          * This is called on page move and undelete, as well as edit
2569          * @static
2570          * @param $title_obj a title object
2571          */
2572
2573         static function onArticleCreate($title) {
2574                 # The talk page isn't in the regular link tables, so we need to update manually:
2575                 if ( $title->isTalkPage() ) {
2576                         $other = $title->getSubjectPage();
2577                 } else {
2578                         $other = $title->getTalkPage();
2579                 }
2580                 $other->invalidateCache();
2581                 $other->purgeSquid();
2582
2583                 $title->touchLinks();
2584                 $title->purgeSquid();
2585         }
2586
2587         static function onArticleDelete( $title ) {
2588                 global $wgUseFileCache, $wgMessageCache;
2589
2590                 $title->touchLinks();
2591                 $title->purgeSquid();
2592
2593                 # File cache
2594                 if ( $wgUseFileCache ) {
2595                         $cm = new HTMLFileCache( $title );
2596                         @unlink( $cm->fileCacheName() );
2597                 }
2598
2599                 if( $title->getNamespace() == NS_MEDIAWIKI) {
2600                         $wgMessageCache->replace( $title->getDBkey(), false );
2601                 }
2602         }
2603
2604         /**
2605          * Purge caches on page update etc
2606          */
2607         static function onArticleEdit( $title ) {
2608                 global $wgDeferredUpdateList, $wgUseFileCache;
2609
2610                 // Invalidate caches of articles which include this page
2611                 $update = new HTMLCacheUpdate( $title, 'templatelinks' );
2612                 $wgDeferredUpdateList[] = $update;
2613
2614                 # Purge squid for this page only
2615                 $title->purgeSquid();
2616
2617                 # Clear file cache
2618                 if ( $wgUseFileCache ) {
2619                         $cm = new HTMLFileCache( $title );
2620                         @unlink( $cm->fileCacheName() );
2621                 }
2622         }
2623
2624         /**#@-*/
2625
2626         /**
2627          * Info about this page
2628          * Called for ?action=info when $wgAllowPageInfo is on.
2629          *
2630          * @public
2631          */
2632         function info() {
2633                 global $wgLang, $wgOut, $wgAllowPageInfo, $wgUser;
2634
2635                 if ( !$wgAllowPageInfo ) {
2636                         $wgOut->showErrorPage( 'nosuchaction', 'nosuchactiontext' );
2637                         return;
2638                 }
2639
2640                 $page = $this->mTitle->getSubjectPage();
2641
2642                 $wgOut->setPagetitle( $page->getPrefixedText() );
2643                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
2644
2645                 # first, see if the page exists at all.
2646                 $exists = $page->getArticleId() != 0;
2647                 if( !$exists ) {
2648                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
2649                                 $wgOut->addHTML(wfMsgWeirdKey ( $this->mTitle->getText() ) );
2650                         } else {
2651                                 $wgOut->addHTML(wfMsg( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon' ) );
2652                         }
2653                 } else {
2654                         $dbr =& wfGetDB( DB_SLAVE );
2655                         $wl_clause = array(
2656                                 'wl_title'     => $page->getDBkey(),
2657                                 'wl_namespace' => $page->getNamespace() );
2658                         $numwatchers = $dbr->selectField(
2659                                 'watchlist',
2660                                 'COUNT(*)',
2661                                 $wl_clause,
2662                                 __METHOD__,
2663                                 $this->getSelectOptions() );
2664
2665                         $pageInfo = $this->pageCountInfo( $page );
2666                         $talkInfo = $this->pageCountInfo( $page->getTalkPage() );
2667
2668                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $wgLang->formatNum( $numwatchers ) ) . '</li>' );
2669                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $wgLang->formatNum( $pageInfo['edits'] ) ) . '</li>');
2670                         if( $talkInfo ) {
2671                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $wgLang->formatNum( $talkInfo['edits'] ) ) . '</li>');
2672                         }
2673                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $wgLang->formatNum( $pageInfo['authors'] ) ) . '</li>' );
2674                         if( $talkInfo ) {
2675                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $wgLang->formatNum( $talkInfo['authors'] ) ) . '</li>' );
2676                         }
2677                         $wgOut->addHTML( '</ul>' );
2678
2679                 }
2680         }
2681
2682         /**
2683          * Return the total number of edits and number of unique editors
2684          * on a given page. If page does not exist, returns false.
2685          *
2686          * @param Title $title
2687          * @return array
2688          * @private
2689          */
2690         function pageCountInfo( $title ) {
2691                 $id = $title->getArticleId();
2692                 if( $id == 0 ) {
2693                         return false;
2694                 }
2695
2696                 $dbr =& wfGetDB( DB_SLAVE );
2697
2698                 $rev_clause = array( 'rev_page' => $id );
2699
2700                 $edits = $dbr->selectField(
2701                         'revision',
2702                         'COUNT(rev_page)',
2703                         $rev_clause,
2704                         __METHOD__,
2705                         $this->getSelectOptions() );
2706
2707                 $authors = $dbr->selectField(
2708                         'revision',
2709                         'COUNT(DISTINCT rev_user_text)',
2710                         $rev_clause,
2711                         __METHOD__,
2712                         $this->getSelectOptions() );
2713
2714                 return array( 'edits' => $edits, 'authors' => $authors );
2715         }
2716
2717         /**
2718          * Return a list of templates used by this article.
2719          * Uses the templatelinks table
2720          *
2721          * @return array Array of Title objects
2722          */
2723         function getUsedTemplates() {
2724                 $result = array();
2725                 $id = $this->mTitle->getArticleID();
2726                 if( $id == 0 ) {
2727                         return array();
2728                 }
2729
2730                 $dbr =& wfGetDB( DB_SLAVE );
2731                 $res = $dbr->select( array( 'templatelinks' ),
2732                         array( 'tl_namespace', 'tl_title' ),
2733                         array( 'tl_from' => $id ),
2734                         'Article:getUsedTemplates' );
2735                 if ( false !== $res ) {
2736                         if ( $dbr->numRows( $res ) ) {
2737                                 while ( $row = $dbr->fetchObject( $res ) ) {
2738                                         $result[] = Title::makeTitle( $row->tl_namespace, $row->tl_title );
2739                                 }
2740                         }
2741                 }
2742                 $dbr->freeResult( $res );
2743                 return $result;
2744         }
2745
2746         /**
2747          * Return an auto-generated summary if the text provided is a redirect.
2748          *
2749          * @param  string $text The wikitext to check
2750          * @return string '' or an appropriate summary
2751          */
2752         public static function getRedirectAutosummary( $text ) {
2753                 $rt = Title::newFromRedirect( $text );
2754                 if( is_object( $rt ) )
2755                         return wfMsgForContent( 'autoredircomment', $rt->getFullText() );
2756                 else
2757                         return '';
2758         }
2759
2760         /**
2761          * Return an auto-generated summary if the new text is much shorter than
2762          * the old text.
2763          *
2764          * @param  string $oldtext The previous text of the page
2765          * @param  string $text    The submitted text of the page
2766          * @return string An appropriate autosummary, or an empty string.
2767          */
2768         public static function getBlankingAutosummary( $oldtext, $text ) {
2769                 if ($oldtext!='' && $text=='') {
2770                         return wfMsgForContent('autosumm-blank');
2771                 } elseif (strlen($oldtext) > 10 * strlen($text) && strlen($text) < 500) {
2772                         #Removing more than 90% of the article
2773                         global $wgContLang;
2774                         $truncatedtext = $wgContLang->truncate($text, max(0, 200 - strlen(wfMsgForContent('autosumm-replace'))), '...');
2775                         return wfMsgForContent('autosumm-replace', $truncatedtext);
2776                 } else {
2777                         return '';
2778                 }
2779         }
2780
2781         /**
2782         * Return an applicable autosummary if one exists for the given edit.
2783         * @param string $oldtext The previous text of the page.
2784         * @param string $newtext The submitted text of the page.
2785         * @param bitmask $flags A bitmask of flags submitted for the edit.
2786         * @return string An appropriate autosummary, or an empty string.
2787         */
2788         public static function getAutosummary( $oldtext, $newtext, $flags ) {
2789
2790                 # This code is UGLY UGLY UGLY.
2791                 # Somebody PLEASE come up with a more elegant way to do it.
2792
2793                 #Redirect autosummaries
2794                 $summary = self::getRedirectAutosummary( $newtext );
2795
2796                 if ($summary)
2797                         return $summary;
2798
2799                 #Blanking autosummaries
2800                 if (!($flags & EDIT_NEW))
2801                         $summary = self::getBlankingAutosummary( $oldtext, $newtext );
2802
2803                 if ($summary)
2804                         return $summary;
2805
2806                 #New page autosummaries
2807                 if ($flags & EDIT_NEW && strlen($newtext)) {
2808                         #If they're making a new article, give its text, truncated, in the summary.
2809                         global $wgContLang;
2810                         $truncatedtext = $wgContLang->truncate(
2811                                 str_replace("\n", ' ', $newtext),
2812                                 max( 0, 200 - strlen( wfMsgForContent( 'autosumm-new') ) ),
2813                                 '...' );
2814                         $summary = wfMsgForContent( 'autosumm-new', $truncatedtext );
2815                 }
2816
2817                 if ($summary)
2818                         return $summary;
2819
2820                 return $summary;
2821         }
2822
2823         /**
2824          * Add the primary page-view wikitext to the output buffer
2825          * Saves the text into the parser cache if possible.
2826          * Updates templatelinks if it is out of date.
2827          *
2828          * @param string  $text
2829          * @param bool    $cache
2830          */
2831         public function outputWikiText( $text, $cache = true ) {
2832                 global $wgParser, $wgUser, $wgOut;
2833
2834                 $popts = $wgOut->parserOptions();
2835                 $popts->setTidy(true);
2836                 $parserOutput = $wgParser->parse( $text, $this->mTitle,
2837                         $popts, true, true, $this->getRevIdFetched() );
2838                 $popts->setTidy(false);
2839                 if ( $cache && $this && $parserOutput->getCacheTime() != -1 ) {
2840                         $parserCache =& ParserCache::singleton();
2841                         $parserCache->save( $parserOutput, $this, $wgUser );
2842                 }
2843
2844                 if ( !wfReadOnly() && $this->mTitle->areRestrictionsCascading() ) {
2845                         // templatelinks table may have become out of sync,
2846                         // especially if using variable-based transclusions.
2847                         // For paranoia, check if things have changed and if
2848                         // so apply updates to the database. This will ensure
2849                         // that cascaded protections apply as soon as the changes
2850                         // are visible.
2851
2852                         # Get templates from templatelinks
2853                         $id = $this->mTitle->getArticleID();
2854
2855                         $tlTemplates = array();
2856
2857                         $dbr =& wfGetDB( DB_SLAVE );
2858                         $res = $dbr->select( array( 'templatelinks' ),
2859                                 array( 'tl_namespace', 'tl_title' ),
2860                                 array( 'tl_from' => $id ),
2861                                 'Article:getUsedTemplates' );
2862
2863                         global $wgContLang;
2864
2865                         if ( false !== $res ) {
2866                                 if ( $dbr->numRows( $res ) ) {
2867                                         while ( $row = $dbr->fetchObject( $res ) ) {
2868                                                 $tlTemplates[] = $wgContLang->getNsText( $row->tl_namespace ) . ':' . $row->tl_title ;
2869                                         }
2870                                 }
2871                         }
2872
2873                         # Get templates from parser output.
2874                         $poTemplates_allns = $parserOutput->getTemplates();
2875
2876                         $poTemplates = array ();
2877                         foreach ( $poTemplates_allns as $ns_templates ) {
2878                                 $poTemplates = array_merge( $poTemplates, $ns_templates );
2879                         }
2880
2881                         # Get the diff
2882                         $templates_diff = array_diff( $poTemplates, $tlTemplates );
2883
2884                         if ( count( $templates_diff ) > 0 ) {
2885                                 # Whee, link updates time.
2886                                 $u = new LinksUpdate( $this->mTitle, $parserOutput );
2887
2888                                 $dbw =& wfGetDb( DB_MASTER );
2889                                 $dbw->begin();
2890
2891                                 $u->doUpdate();
2892
2893                                 $dbw->commit();
2894                         }
2895                 }
2896
2897                 $wgOut->addParserOutput( $parserOutput );
2898         }
2899
2900 }
2901
2902 ?>