includes/Article.php

   1 <?php
   2 /**
   3  * File for articles
   4  */
   5
   6 /**
   7  * Class representing a MediaWiki article and history.
   8  *
   9  * See design.txt for an overview.
  10  * Note: edit user interface and cache support functions have been
  11  * moved to separate EditPage and HTMLFileCache classes.
  12  *
  13  */
  14 class Article {
  15         /**@{{
  16          * @private
  17          */
  18         var $mComment;                  //!<
  19         var $mContent;                  //!<
  20         var $mContentLoaded;    //!<
  21         var $mCounter;                  //!<
  22         var $mForUpdate;                //!<
  23         var $mGoodAdjustment;   //!<
  24         var $mLatest;                   //!<
  25         var $mMinorEdit;                //!<
  26         var $mOldId;                    //!<
  27         var $mRedirectedFrom;   //!<
  28         var $mRedirectUrl;              //!<
  29         var $mRevIdFetched;             //!<
  30         var $mRevision;                 //!<
  31         var $mTimestamp;                //!<
  32         var $mTitle;                    //!<
  33         var $mTotalAdjustment;  //!<
  34         var $mTouched;                  //!<
  35         var $mUser;                             //!<
  36         var $mUserText;                 //!<
  37         /**@}}*/
  38
  39         /**
  40          * Constants used by internal components to get rollback results
  41          */
  42         const SUCCESS = 0;                      // Operation successful
  43         const PERM_DENIED = 1;          // Permission denied
  44         const BLOCKED = 2;                      // User has been blocked
  45         const READONLY = 3;                     // Wiki is in read-only mode
  46         const BAD_TOKEN = 4;            // Invalid token specified
  47         const BAD_TITLE = 5;            // $this is not a valid Article
  48         const ALREADY_ROLLED = 6;       // Someone else already rolled this back. $from and $summary will be set
  49         const ONLY_AUTHOR = 7;          // User is the only author of the page
  50
  51         /**
  52          * Constructor and clear the article
  53          * @param $title Reference to a Title object.
  54          * @param $oldId Integer revision ID, null to fetch from request, zero for current
  55          */
  56         function __construct( &$title, $oldId = null ) {
  57                 $this->mTitle =& $title;
  58                 $this->mOldId = $oldId;
  59                 $this->clear();
  60         }
  61
  62         /**
  63          * Tell the page view functions that this view was redirected
  64          * from another page on the wiki.
  65          * @param $from Title object.
  66          */
  67         function setRedirectedFrom( $from ) {
  68                 $this->mRedirectedFrom = $from;
  69         }
  70
  71         /**
  72          * @return mixed false, Title of in-wiki target, or string with URL
  73          */
  74         function followRedirect() {
  75                 $text = $this->getContent();
  76                 $rt = Title::newFromRedirect( $text );
  77
  78                 # process if title object is valid and not special:userlogout
  79                 if( $rt ) {
  80                         if( $rt->getInterwiki() != '' ) {
  81                                 if( $rt->isLocal() ) {
  82                                         // Offsite wikis need an HTTP redirect.
  83                                         //
  84                                         // This can be hard to reverse and may produce loops,
  85                                         // so they may be disabled in the site configuration.
  86
  87                                         $source = $this->mTitle->getFullURL( 'redirect=no' );
  88                                         return $rt->getFullURL( 'rdfrom=' . urlencode( $source ) );
  89                                 }
  90                         } else {
  91                                 if( $rt->getNamespace() == NS_SPECIAL ) {
  92                                         // Gotta handle redirects to special pages differently:
  93                                         // Fill the HTTP response "Location" header and ignore
  94                                         // the rest of the page we're on.
  95                                         //
  96                                         // This can be hard to reverse, so they may be disabled.
  97
  98                                         if( $rt->isSpecial( 'Userlogout' ) ) {
  99                                                 // rolleyes
 100                                         } else {
 101                                                 return $rt->getFullURL();
 102                                         }
 103                                 }
 104                                 return $rt;
 105                         }
 106                 }
 107
 108                 // No or invalid redirect
 109                 return false;
 110         }
 111
 112         /**
 113          * get the title object of the article
 114          */
 115         function getTitle() {
 116                 return $this->mTitle;
 117         }
 118
 119         /**
 120           * Clear the object
 121           * @private
 122           */
 123         function clear() {
 124                 $this->mDataLoaded    = false;
 125                 $this->mContentLoaded = false;
 126
 127                 $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
 128                 $this->mRedirectedFrom = null; # Title object if set
 129                 $this->mUserText =
 130                 $this->mTimestamp = $this->mComment = '';
 131                 $this->mGoodAdjustment = $this->mTotalAdjustment = 0;
 132                 $this->mTouched = '19700101000000';
 133                 $this->mForUpdate = false;
 134                 $this->mIsRedirect = false;
 135                 $this->mRevIdFetched = 0;
 136                 $this->mRedirectUrl = false;
 137                 $this->mLatest = false;
 138         }
 139
 140         /**
 141          * Note that getContent/loadContent do not follow redirects anymore.
 142          * If you need to fetch redirectable content easily, try
 143          * the shortcut in Article::followContent()
 144          * FIXME
 145          * @todo There are still side-effects in this!
 146          *        In general, you should use the Revision class, not Article,
 147          *        to fetch text for purposes other than page views.
 148          *
 149          * @return Return the text of this revision
 150         */
 151         function getContent() {
 152                 global $wgUser, $wgOut;
 153
 154                 wfProfileIn( __METHOD__ );
 155
 156                 if ( 0 == $this->getID() ) {
 157                         wfProfileOut( __METHOD__ );
 158                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
 159
 160                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 161                                 $ret = wfMsgWeirdKey ( $this->mTitle->getText() ) ;
 162                         } else {
 163                                 $ret = wfMsg( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon' );
 164                         }
 165
 166                         return "<div class='noarticletext'>$ret</div>";
 167                 } else {
 168                         $this->loadContent();
 169                         wfProfileOut( __METHOD__ );
 170                         return $this->mContent;
 171                 }
 172         }
 173
 174         /**
 175          * This function returns the text of a section, specified by a number ($section).
 176          * A section is text under a heading like == Heading == or \<h1\>Heading\</h1\>, or
 177          * the first section before any such heading (section 0).
 178          *
 179          * If a section contains subsections, these are also returned.
 180          *
 181          * @param $text String: text to look in
 182          * @param $section Integer: section number
 183          * @return string text of the requested section
 184          * @deprecated
 185          */
 186         function getSection($text,$section) {
 187                 global $wgParser;
 188                 return $wgParser->getSection( $text, $section );
 189         }
 190
 191         /**
 192          * @return int The oldid of the article that is to be shown, 0 for the
 193          *             current revision
 194          */
 195         function getOldID() {
 196                 if ( is_null( $this->mOldId ) ) {
 197                         $this->mOldId = $this->getOldIDFromRequest();
 198                 }
 199                 return $this->mOldId;
 200         }
 201
 202         /**
 203          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 204          *
 205          * @return int The old id for the request
 206          */
 207         function getOldIDFromRequest() {
 208                 global $wgRequest;
 209                 $this->mRedirectUrl = false;
 210                 $oldid = $wgRequest->getVal( 'oldid' );
 211                 if ( isset( $oldid ) ) {
 212                         $oldid = intval( $oldid );
 213                         if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 214                                 $nextid = $this->mTitle->getNextRevisionID( $oldid );
 215                                 if ( $nextid  ) {
 216                                         $oldid = $nextid;
 217                                 } else {
 218                                         $this->mRedirectUrl = $this->mTitle->getFullURL( 'redirect=no' );
 219                                 }
 220                         } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 221                                 $previd = $this->mTitle->getPreviousRevisionID( $oldid );
 222                                 if ( $previd ) {
 223                                         $oldid = $previd;
 224                                 } else {
 225                                         # TODO
 226                                 }
 227                         }
 228                         # unused:
 229                         # $lastid = $oldid;
 230                 }
 231
 232                 if ( !$oldid ) {
 233                         $oldid = 0;
 234                 }
 235                 return $oldid;
 236         }
 237
 238         /**
 239          * Load the revision (including text) into this object
 240          */
 241         function loadContent() {
 242                 if ( $this->mContentLoaded ) return;
 243
 244                 # Query variables :P
 245                 $oldid = $this->getOldID();
 246
 247                 # Pre-fill content with error message so that if something
 248                 # fails we'll have something telling us what we intended.
 249                 $this->mOldId = $oldid;
 250                 $this->fetchContent( $oldid );
 251         }
 252
 253
 254         /**
 255          * Fetch a page record with the given conditions
 256          * @param Database $dbr
 257          * @param array    $conditions
 258          * @private
 259          */
 260         function pageData( $dbr, $conditions ) {
 261                 $fields = array(
 262                                 'page_id',
 263                                 'page_namespace',
 264                                 'page_title',
 265                                 'page_restrictions',
 266                                 'page_counter',
 267                                 'page_is_redirect',
 268                                 'page_is_new',
 269                                 'page_random',
 270                                 'page_touched',
 271                                 'page_latest',
 272                                 'page_len',
 273                 );
 274                 wfRunHooks( 'ArticlePageDataBefore', array( &$this, &$fields ) );
 275                 $row = $dbr->selectRow(
 276                         'page',
 277                         $fields,
 278                         $conditions,
 279                         __METHOD__
 280                 );
 281                 wfRunHooks( 'ArticlePageDataAfter', array( &$this, &$row ) );
 282                 return $row ;
 283         }
 284
 285         /**
 286          * @param Database $dbr
 287          * @param Title $title
 288          */
 289         function pageDataFromTitle( $dbr, $title ) {
 290                 return $this->pageData( $dbr, array(
 291                         'page_namespace' => $title->getNamespace(),
 292                         'page_title'     => $title->getDBkey() ) );
 293         }
 294
 295         /**
 296          * @param Database $dbr
 297          * @param int $id
 298          */
 299         function pageDataFromId( $dbr, $id ) {
 300                 return $this->pageData( $dbr, array( 'page_id' => $id ) );
 301         }
 302
 303         /**
 304          * Set the general counter, title etc data loaded from
 305          * some source.
 306          *
 307          * @param object $data
 308          * @private
 309          */
 310         function loadPageData( $data = 'fromdb' ) {
 311                 if ( $data === 'fromdb' ) {
 312                         $dbr = $this->getDB();
 313                         $data = $this->pageDataFromId( $dbr, $this->getId() );
 314                 }
 315
 316                 $lc =& LinkCache::singleton();
 317                 if ( $data ) {
 318                         $lc->addGoodLinkObj( $data->page_id, $this->mTitle );
 319
 320                         $this->mTitle->mArticleID = $data->page_id;
 321
 322                         # Old-fashioned restrictions.
 323                         $this->mTitle->loadRestrictions( $data->page_restrictions );
 324
 325                         $this->mCounter     = $data->page_counter;
 326                         $this->mTouched     = wfTimestamp( TS_MW, $data->page_touched );
 327                         $this->mIsRedirect  = $data->page_is_redirect;
 328                         $this->mLatest      = $data->page_latest;
 329                 } else {
 330                         if ( is_object( $this->mTitle ) ) {
 331                                 $lc->addBadLinkObj( $this->mTitle );
 332                         }
 333                         $this->mTitle->mArticleID = 0;
 334                 }
 335
 336                 $this->mDataLoaded  = true;
 337         }
 338
 339         /**
 340          * Get text of an article from database
 341          * Does *NOT* follow redirects.
 342          * @param int $oldid 0 for whatever the latest revision is
 343          * @return string
 344          */
 345         function fetchContent( $oldid = 0 ) {
 346                 if ( $this->mContentLoaded ) {
 347                         return $this->mContent;
 348                 }
 349
 350                 $dbr = $this->getDB();
 351
 352                 # Pre-fill content with error message so that if something
 353                 # fails we'll have something telling us what we intended.
 354                 $t = $this->mTitle->getPrefixedText();
 355                 if( $oldid ) {
 356                         $t .= ',oldid='.$oldid;
 357                 }
 358                 $this->mContent = wfMsg( 'missingarticle', $t ) ;
 359
 360                 if( $oldid ) {
 361                         $revision = Revision::newFromId( $oldid );
 362                         if( is_null( $revision ) ) {
 363                                 wfDebug( __METHOD__." failed to retrieve specified revision, id $oldid\n" );
 364                                 return false;
 365                         }
 366                         $data = $this->pageDataFromId( $dbr, $revision->getPage() );
 367                         if( !$data ) {
 368                                 wfDebug( __METHOD__." failed to get page data linked to revision id $oldid\n" );
 369                                 return false;
 370                         }
 371                         $this->mTitle = Title::makeTitle( $data->page_namespace, $data->page_title );
 372                         $this->loadPageData( $data );
 373                 } else {
 374                         if( !$this->mDataLoaded ) {
 375                                 $data = $this->pageDataFromTitle( $dbr, $this->mTitle );
 376                                 if( !$data ) {
 377                                         wfDebug( __METHOD__." failed to find page data for title " . $this->mTitle->getPrefixedText() . "\n" );
 378                                         return false;
 379                                 }
 380                                 $this->loadPageData( $data );
 381                         }
 382                         $revision = Revision::newFromId( $this->mLatest );
 383                         if( is_null( $revision ) ) {
 384                                 wfDebug( __METHOD__." failed to retrieve current page, rev_id {$data->page_latest}\n" );
 385                                 return false;
 386                         }
 387                 }
 388
 389                 // FIXME: Horrible, horrible! This content-loading interface just plain sucks.
 390                 // We should instead work with the Revision object when we need it...
 391                 $this->mContent = $revision->userCan( Revision::DELETED_TEXT ) ? $revision->getRawText() : "";
 392                 //$this->mContent   = $revision->getText();
 393
 394                 $this->mUser      = $revision->getUser();
 395                 $this->mUserText  = $revision->getUserText();
 396                 $this->mComment   = $revision->getComment();
 397                 $this->mTimestamp = wfTimestamp( TS_MW, $revision->getTimestamp() );
 398
 399                 $this->mRevIdFetched = $revision->getID();
 400                 $this->mContentLoaded = true;
 401                 $this->mRevision =& $revision;
 402
 403                 wfRunHooks( 'ArticleAfterFetchContent', array( &$this, &$this->mContent ) ) ;
 404
 405                 return $this->mContent;
 406         }
 407
 408         /**
 409          * Read/write accessor to select FOR UPDATE
 410          *
 411          * @param $x Mixed: FIXME
 412          */
 413         function forUpdate( $x = NULL ) {
 414                 return wfSetVar( $this->mForUpdate, $x );
 415         }
 416
 417         /**
 418          * Get the database which should be used for reads
 419          *
 420          * @return Database
 421          */
 422         function getDB() {
 423                 return wfGetDB( DB_MASTER );
 424         }
 425
 426         /**
 427          * Get options for all SELECT statements
 428          *
 429          * @param $options Array: an optional options array which'll be appended to
 430          *                       the default
 431          * @return Array: options
 432          */
 433         function getSelectOptions( $options = '' ) {
 434                 if ( $this->mForUpdate ) {
 435                         if ( is_array( $options ) ) {
 436                                 $options[] = 'FOR UPDATE';
 437                         } else {
 438                                 $options = 'FOR UPDATE';
 439                         }
 440                 }
 441                 return $options;
 442         }
 443
 444         /**
 445          * @return int Page ID
 446          */
 447         function getID() {
 448                 if( $this->mTitle ) {
 449                         return $this->mTitle->getArticleID();
 450                 } else {
 451                         return 0;
 452                 }
 453         }
 454
 455         /**
 456          * @return bool Whether or not the page exists in the database
 457          */
 458         function exists() {
 459                 return $this->getId() != 0;
 460         }
 461
 462         /**
 463          * @return int The view count for the page
 464          */
 465         function getCount() {
 466                 if ( -1 == $this->mCounter ) {
 467                         $id = $this->getID();
 468                         if ( $id == 0 ) {
 469                                 $this->mCounter = 0;
 470                         } else {
 471                                 $dbr = wfGetDB( DB_SLAVE );
 472                                 $this->mCounter = $dbr->selectField( 'page', 'page_counter', array( 'page_id' => $id ),
 473                                         'Article::getCount', $this->getSelectOptions() );
 474                         }
 475                 }
 476                 return $this->mCounter;
 477         }
 478
 479         /**
 480          * Determine whether a page  would be suitable for being counted as an
 481          * article in the site_stats table based on the title & its content
 482          *
 483          * @param $text String: text to analyze
 484          * @return bool
 485          */
 486         function isCountable( $text ) {
 487                 global $wgUseCommaCount;
 488
 489                 $token = $wgUseCommaCount ? ',' : '[[';
 490                 return
 491                         $this->mTitle->isContentPage()
 492                         && !$this->isRedirect( $text )
 493                         && in_string( $token, $text );
 494         }
 495
 496         /**
 497          * Tests if the article text represents a redirect
 498          *
 499          * @param $text String: FIXME
 500          * @return bool
 501          */
 502         function isRedirect( $text = false ) {
 503                 if ( $text === false ) {
 504                         $this->loadContent();
 505                         $titleObj = Title::newFromRedirect( $this->fetchContent() );
 506                 } else {
 507                         $titleObj = Title::newFromRedirect( $text );
 508                 }
 509                 return $titleObj !== NULL;
 510         }
 511
 512         /**
 513          * Returns true if the currently-referenced revision is the current edit
 514          * to this page (and it exists).
 515          * @return bool
 516          */
 517         function isCurrent() {
 518                 # If no oldid, this is the current version.
 519                 if ($this->getOldID() == 0)
 520                         return true;
 521
 522                 return $this->exists() &&
 523                         isset( $this->mRevision ) &&
 524                         $this->mRevision->isCurrent();
 525         }
 526
 527         /**
 528          * Loads everything except the text
 529          * This isn't necessary for all uses, so it's only done if needed.
 530          * @private
 531          */
 532         function loadLastEdit() {
 533                 if ( -1 != $this->mUser )
 534                         return;
 535
 536                 # New or non-existent articles have no user information
 537                 $id = $this->getID();
 538                 if ( 0 == $id ) return;
 539
 540                 $this->mLastRevision = Revision::loadFromPageId( $this->getDB(), $id );
 541                 if( !is_null( $this->mLastRevision ) ) {
 542                         $this->mUser      = $this->mLastRevision->getUser();
 543                         $this->mUserText  = $this->mLastRevision->getUserText();
 544                         $this->mTimestamp = $this->mLastRevision->getTimestamp();
 545                         $this->mComment   = $this->mLastRevision->getComment();
 546                         $this->mMinorEdit = $this->mLastRevision->isMinor();
 547                         $this->mRevIdFetched = $this->mLastRevision->getID();
 548                 }
 549         }
 550
 551         function getTimestamp() {
 552                 // Check if the field has been filled by ParserCache::get()
 553                 if ( !$this->mTimestamp ) {
 554                         $this->loadLastEdit();
 555                 }
 556                 return wfTimestamp(TS_MW, $this->mTimestamp);
 557         }
 558
 559         function getUser() {
 560                 $this->loadLastEdit();
 561                 return $this->mUser;
 562         }
 563
 564         function getUserText() {
 565                 $this->loadLastEdit();
 566                 return $this->mUserText;
 567         }
 568
 569         function getComment() {
 570                 $this->loadLastEdit();
 571                 return $this->mComment;
 572         }
 573
 574         function getMinorEdit() {
 575                 $this->loadLastEdit();
 576                 return $this->mMinorEdit;
 577         }
 578
 579         function getRevIdFetched() {
 580                 $this->loadLastEdit();
 581                 return $this->mRevIdFetched;
 582         }
 583
 584         /**
 585          * @todo Document, fixme $offset never used.
 586          * @param $limit Integer: default 0.
 587          * @param $offset Integer: default 0.
 588          */
 589         function getContributors($limit = 0, $offset = 0) {
 590                 # XXX: this is expensive; cache this info somewhere.
 591
 592                 $contribs = array();
 593                 $dbr = wfGetDB( DB_SLAVE );
 594                 $revTable = $dbr->tableName( 'revision' );
 595                 $userTable = $dbr->tableName( 'user' );
 596                 $user = $this->getUser();
 597                 $pageId = $this->getId();
 598
 599                 $sql = "SELECT rev_user, rev_user_text, user_real_name, MAX(rev_timestamp) as timestamp
 600                         FROM $revTable LEFT JOIN $userTable ON rev_user = user_id
 601                         WHERE rev_page = $pageId
 602                         AND rev_user != $user
 603                         GROUP BY rev_user, rev_user_text, user_real_name
 604                         ORDER BY timestamp DESC";
 605
 606                 if ($limit > 0) { $sql .= ' LIMIT '.$limit; }
 607                 $sql .= ' '. $this->getSelectOptions();
 608
 609                 $res = $dbr->query($sql, __METHOD__);
 610
 611                 while ( $line = $dbr->fetchObject( $res ) ) {
 612                         $contribs[] = array($line->rev_user, $line->rev_user_text, $line->user_real_name);
 613                 }
 614
 615                 $dbr->freeResult($res);
 616                 return $contribs;
 617         }
 618
 619         /**
 620          * This is the default action of the script: just view the page of
 621          * the given title.
 622         */
 623         function view() {
 624                 global $wgUser, $wgOut, $wgRequest, $wgContLang;
 625                 global $wgEnableParserCache, $wgStylePath, $wgUseRCPatrol, $wgParser;
 626                 global $wgUseTrackbacks, $wgNamespaceRobotPolicies, $wgArticleRobotPolicies;
 627                 $sk = $wgUser->getSkin();
 628
 629                 wfProfileIn( __METHOD__ );
 630
 631                 $parserCache =& ParserCache::singleton();
 632                 $ns = $this->mTitle->getNamespace(); # shortcut
 633
 634                 # Get variables from query string
 635                 $oldid = $this->getOldID();
 636
 637                 # getOldID may want us to redirect somewhere else
 638                 if ( $this->mRedirectUrl ) {
 639                         $wgOut->redirect( $this->mRedirectUrl );
 640                         wfProfileOut( __METHOD__ );
 641                         return;
 642                 }
 643
 644                 $diff = $wgRequest->getVal( 'diff' );
 645                 $rcid = $wgRequest->getVal( 'rcid' );
 646                 $rdfrom = $wgRequest->getVal( 'rdfrom' );
 647                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
 648
 649                 $wgOut->setArticleFlag( true );
 650
 651                 # Discourage indexing of printable versions, but encourage following
 652                 if( $wgOut->isPrintable() ) {
 653                         $policy = 'noindex,follow';
 654                 } elseif ( isset( $wgArticleRobotPolicies[$this->mTitle->getPrefixedText()] ) ) {
 655                         $policy = $wgArticleRobotPolicies[$this->mTitle->getPrefixedText()];
 656                 } elseif( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 657                         # Honour customised robot policies for this namespace
 658                         $policy = $wgNamespaceRobotPolicies[$ns];
 659                 } else {
 660                         # Default to encourage indexing and following links
 661                         $policy = 'index,follow';
 662                 }
 663                 $wgOut->setRobotPolicy( $policy );
 664
 665                 # If we got diff and oldid in the query, we want to see a
 666                 # diff page instead of the article.
 667
 668                 if ( !is_null( $diff ) ) {
 669                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 670
 671                         $de = new DifferenceEngine( $this->mTitle, $oldid, $diff, $rcid );
 672                         // DifferenceEngine directly fetched the revision:
 673                         $this->mRevIdFetched = $de->mNewid;
 674                         $de->showDiffPage( $diffOnly );
 675
 676                         // Needed to get the page's current revision
 677                         $this->loadPageData();
 678                         if( $diff == 0 || $diff == $this->mLatest ) {
 679                                 # Run view updates for current revision only
 680                                 $this->viewUpdates();
 681                         }
 682                         wfProfileOut( __METHOD__ );
 683                         return;
 684                 }
 685
 686                 if ( empty( $oldid ) && $this->checkTouched() ) {
 687                         $wgOut->setETag($parserCache->getETag($this, $wgUser));
 688
 689                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 690                                 wfProfileOut( __METHOD__ );
 691                                 return;
 692                         } else if ( $this->tryFileCache() ) {
 693                                 # tell wgOut that output is taken care of
 694                                 $wgOut->disable();
 695                                 $this->viewUpdates();
 696                                 wfProfileOut( __METHOD__ );
 697                                 return;
 698                         }
 699                 }
 700
 701                 # Should the parser cache be used?
 702                 $pcache = $wgEnableParserCache
 703                         && intval( $wgUser->getOption( 'stubthreshold' ) ) == 0
 704                         && $this->exists()
 705                         && empty( $oldid )
 706                         && !$this->mTitle->isCssOrJsPage()
 707                         && !$this->mTitle->isCssJsSubpage();
 708                 wfDebug( 'Article::view using parser cache: ' . ($pcache ? 'yes' : 'no' ) . "\n" );
 709                 if ( $wgUser->getOption( 'stubthreshold' ) ) {
 710                         wfIncrStats( 'pcache_miss_stub' );
 711                 }
 712
 713                 $wasRedirected = false;
 714                 if ( isset( $this->mRedirectedFrom ) ) {
 715                         // This is an internally redirected page view.
 716                         // We'll need a backlink to the source page for navigation.
 717                         if ( wfRunHooks( 'ArticleViewRedirect', array( &$this ) ) ) {
 718                                 $sk = $wgUser->getSkin();
 719                                 $redir = $sk->makeKnownLinkObj( $this->mRedirectedFrom, '', 'redirect=no' );
 720                                 $s = wfMsg( 'redirectedfrom', $redir );
 721                                 $wgOut->setSubtitle( $s );
 722
 723                                 // Set the fragment if one was specified in the redirect
 724                                 if ( strval( $this->mTitle->getFragment() ) != '' ) {
 725                                         $fragment = Xml::escapeJsString( $this->mTitle->getFragmentForURL() );
 726                                         $wgOut->addInlineScript( "redirectToFragment(\"$fragment\");" );
 727                                 }
 728                                 $wasRedirected = true;
 729                         }
 730                 } elseif ( !empty( $rdfrom ) ) {
 731                         // This is an externally redirected view, from some other wiki.
 732                         // If it was reported from a trusted site, supply a backlink.
 733                         global $wgRedirectSources;
 734                         if( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 735                                 $sk = $wgUser->getSkin();
 736                                 $redir = $sk->makeExternalLink( $rdfrom, $rdfrom );
 737                                 $s = wfMsg( 'redirectedfrom', $redir );
 738                                 $wgOut->setSubtitle( $s );
 739                                 $wasRedirected = true;
 740                         }
 741                 }
 742
 743                 if ( $this->mTitle->isProtected() ) {
 744                         $editrestr = $this->mTitle->getRestrictions('edit');
 745                         $moverestr = $this->mTitle->getRestrictions('move');
 746                         $this->addProtectionNotice( $editrestr, $moverestr );
 747                 }
 748
 749                 $outputDone = false;
 750                 wfRunHooks( 'ArticleViewHeader', array( &$this, &$outputDone, &$pcache ) );
 751                 if ( $pcache ) {
 752                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 753                                 // Ensure that UI elements requiring revision ID have
 754                                 // the correct version information.
 755                                 $wgOut->setRevisionId( $this->mLatest );
 756                                 $outputDone = true;
 757                         }
 758                 }
 759                 if ( !$outputDone ) {
 760                         $text = $this->getContent();
 761                         if ( $text === false ) {
 762                                 # Failed to load, replace text with error message
 763                                 $t = $this->mTitle->getPrefixedText();
 764                                 if( $oldid ) {
 765                                         $t .= ',oldid='.$oldid;
 766                                         $text = wfMsg( 'missingarticle', $t );
 767                                 } else {
 768                                         $text = wfMsg( 'noarticletext', $t );
 769                                 }
 770                         }
 771
 772                         # Another whitelist check in case oldid is altering the title
 773                         if ( !$this->mTitle->userCanRead() ) {
 774                                 $wgOut->loginToUse();
 775                                 $wgOut->output();
 776                                 exit;
 777                         }
 778
 779                         # We're looking at an old revision
 780
 781                         if ( !empty( $oldid ) ) {
 782                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 783                                 if( is_null( $this->mRevision ) ) {
 784                                         // FIXME: This would be a nice place to load the 'no such page' text.
 785                                 } else {
 786                                         $this->setOldSubtitle( isset($this->mOldId) ? $this->mOldId : $oldid );
 787                                         if( $this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
 788                                                 if( !$this->mRevision->userCan( Revision::DELETED_TEXT ) ) {
 789                                                         $wgOut->addWikiText( wfMsg( 'rev-deleted-text-permission' ) );
 790                                                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 791                                                         return;
 792                                                 } else {
 793                                                         $wgOut->addWikiText( wfMsg( 'rev-deleted-text-view' ) );
 794                                                         // and we are allowed to see...
 795                                                 }
 796                                         }
 797                                 }
 798
 799                         }
 800                 }
 801                 if( !$outputDone ) {
 802                         $wgOut->setRevisionId( $this->getRevIdFetched() );
 803
 804                          // Pages containing custom CSS or JavaScript get special treatment
 805                         if( $this->mTitle->isCssOrJsPage() || $this->mTitle->isCssJsSubpage() ) {
 806                                 $wgOut->addHtml( wfMsgExt( 'clearyourcache', 'parse' ) );
 807
 808                                 // Give hooks a chance to customise the output
 809                                 if( wfRunHooks( 'ShowRawCssJs', array( $this->mContent, $this->mTitle, $wgOut ) ) ) {
 810                                         // Wrap the whole lot in a <pre> and don't parse
 811                                         $m = array();
 812                                         preg_match( '!\.(css|js)$!u', $this->mTitle->getText(), $m );
 813                                         $wgOut->addHtml( "<pre class=\"mw-code mw-{$m[1]}\" dir=\"ltr\">\n" );
 814                                         $wgOut->addHtml( htmlspecialchars( $this->mContent ) );
 815                                         $wgOut->addHtml( "\n</pre>\n" );
 816                                 }
 817
 818                         }
 819
 820                         elseif ( $rt = Title::newFromRedirect( $text ) ) {
 821                                 # Display redirect
 822                                 $imageDir = $wgContLang->isRTL() ? 'rtl' : 'ltr';
 823                                 $imageUrl = $wgStylePath.'/common/images/redirect' . $imageDir . '.png';
 824                                 # Don't overwrite the subtitle if this was an old revision
 825                                 if( !$wasRedirected && $this->isCurrent() ) {
 826                                         $wgOut->setSubtitle( wfMsgHtml( 'redirectpagesub' ) );
 827                                 }
 828                                 $link = $sk->makeLinkObj( $rt, $rt->getFullText() );
 829
 830                                 $wgOut->addHTML( '<img src="'.$imageUrl.'" alt="#REDIRECT " />' .
 831                                   '<span class="redirectText">'.$link.'</span>' );
 832
 833                                 $parseout = $wgParser->parse($text, $this->mTitle, ParserOptions::newFromUser($wgUser));
 834                                 $wgOut->addParserOutputNoText( $parseout );
 835                         } else if ( $pcache ) {
 836                                 # Display content and save to parser cache
 837                                 $this->outputWikiText( $text );
 838                         } else {
 839                                 # Display content, don't attempt to save to parser cache
 840                                 # Don't show section-edit links on old revisions... this way lies madness.
 841                                 if( !$this->isCurrent() ) {
 842                                         $oldEditSectionSetting = $wgOut->parserOptions()->setEditSection( false );
 843                                 }
 844                                 # Display content and don't save to parser cache
 845                                 # With timing hack -- TS 2006-07-26
 846                                 $time = -wfTime();
 847                                 $this->outputWikiText( $text, false );
 848                                 $time += wfTime();
 849
 850                                 # Timing hack
 851                                 if ( $time > 3 ) {
 852                                         wfDebugLog( 'slow-parse', sprintf( "%-5.2f %s", $time,
 853                                                 $this->mTitle->getPrefixedDBkey()));
 854                                 }
 855
 856                                 if( !$this->isCurrent() ) {
 857                                         $wgOut->parserOptions()->setEditSection( $oldEditSectionSetting );
 858                                 }
 859
 860                         }
 861                 }
 862                 /* title may have been set from the cache */
 863                 $t = $wgOut->getPageTitle();
 864                 if( empty( $t ) ) {
 865                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 866                 }
 867
 868                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 869                 if( $ns == NS_USER_TALK &&
 870                         User::isIP( $this->mTitle->getText() ) ) {
 871                         $wgOut->addWikiText( wfMsg('anontalkpagetext') );
 872                 }
 873
 874                 # If we have been passed an &rcid= parameter, we want to give the user a
 875                 # chance to mark this new article as patrolled.
 876                 if ( $wgUseRCPatrol && !is_null( $rcid ) && $rcid != 0 && $wgUser->isAllowed( 'patrol' ) ) {
 877                         $wgOut->addHTML(
 878                                 "<div class='patrollink'>" .
 879                                         wfMsgHtml( 'markaspatrolledlink',
 880                                         $sk->makeKnownLinkObj( $this->mTitle, wfMsgHtml('markaspatrolledtext'),
 881                                                 "action=markpatrolled&rcid=$rcid" )
 882                                         ) .
 883                                 '</div>'
 884                          );
 885                 }
 886
 887                 # Trackbacks
 888                 if ($wgUseTrackbacks)
 889                         $this->addTrackbacks();
 890
 891                 $this->viewUpdates();
 892                 wfProfileOut( __METHOD__ );
 893         }
 894
 895         /*
 896         * Output a notice that a page is protected. Only give details for move/edit
 897         * restrictions. Cares only about the first permission in the arrays, which is
 898         * part of a larger shitty inconsistency about requiring several permissions...
 899         * @param Array $editrestr, edit restrictions
 900         * @param Array $moverestr, move restrictions
 901         */
 902         function addProtectionNotice( $editrestr, $moverestr ) {
 903                 global $wgOut;
 904
 905                 $editGroups = $moveGroups = wfMsg('protected-anyone');
 906                 # Get groups that have each right
 907                 if( !empty( $editrestr ) ) {
 908                         $permission = ($editrestr[0]=='sysop') ? 'protect' : $editrestr[0];
 909                         $editGroups = $wgOut->getGroupsWithPermission( $permission );
 910                         $editGroups = implode( ', ', $editGroups );
 911                 }
 912                 if( !empty( $moverestr ) ) {
 913                         $permission = ($moverestr[0]=='sysop') ? 'protect' : $moverestr[0];
 914                         $moveGroups = $wgOut->getGroupsWithPermission( $permission );
 915                         $moveGroups = implode( ', ', $moveGroups );
 916                 }
 917                 # Use general messages if no groups found for a type
 918                 if( !$editGroups || !$moveGroups ) {
 919                         $msg = wfMsg( 'protected-subtitle' );
 920                 } else if( $editGroups == $moveGroups ) {
 921                         $msg = wfMsg( 'protected-subtitle-same', $editGroups, $moveGroups );
 922                 } else {
 923                         $msg = wfMsg( 'protected-subtitle-each', $editGroups, $moveGroups );
 924                 }
 925                 if( $wgOut->getSubtitle() )
 926                         $msg = " $msg";
 927
 928                 $wgOut->setSubtitle( $wgOut->getSubtitle() . $msg );
 929         }
 930
 931         function addTrackbacks() {
 932                 global $wgOut, $wgUser;
 933
 934                 $dbr = wfGetDB(DB_SLAVE);
 935                 $tbs = $dbr->select(
 936                                 /* FROM   */ 'trackbacks',
 937                                 /* SELECT */ array('tb_id', 'tb_title', 'tb_url', 'tb_ex', 'tb_name'),
 938                                 /* WHERE  */ array('tb_page' => $this->getID())
 939                 );
 940
 941                 if (!$dbr->numrows($tbs))
 942                         return;
 943
 944                 $tbtext = "";
 945                 while ($o = $dbr->fetchObject($tbs)) {
 946                         $rmvtxt = "";
 947                         if ($wgUser->isAllowed( 'trackback' )) {
 948                                 $delurl = $this->mTitle->getFullURL("action=deletetrackback&tbid="
 949                                                 . $o->tb_id . "&token=" . urlencode( $wgUser->editToken() ) );
 950                                 $rmvtxt = wfMsg( 'trackbackremove', htmlspecialchars( $delurl ) );
 951                         }
 952                         $tbtext .= wfMsg(strlen($o->tb_ex) ? 'trackbackexcerpt' : 'trackback',
 953                                         $o->tb_title,
 954                                         $o->tb_url,
 955                                         $o->tb_ex,
 956                                         $o->tb_name,
 957                                         $rmvtxt);
 958                 }
 959                 $wgOut->addWikitext(wfMsg('trackbackbox', $tbtext));
 960         }
 961
 962         function deletetrackback() {
 963                 global $wgUser, $wgRequest, $wgOut, $wgTitle;
 964
 965                 if (!$wgUser->matchEditToken($wgRequest->getVal('token'))) {
 966                         $wgOut->addWikitext(wfMsg('sessionfailure'));
 967                         return;
 968                 }
 969
 970                 if ((!$wgUser->isAllowed('delete'))) {
 971                         $wgOut->permissionRequired( 'delete' );
 972                         return;
 973                 }
 974
 975                 if (wfReadOnly()) {
 976                         $wgOut->readOnlyPage();
 977                         return;
 978                 }
 979
 980                 $db = wfGetDB(DB_MASTER);
 981                 $db->delete('trackbacks', array('tb_id' => $wgRequest->getInt('tbid')));
 982                 $wgTitle->invalidateCache();
 983                 $wgOut->addWikiText(wfMsg('trackbackdeleteok'));
 984         }
 985
 986         function render() {
 987                 global $wgOut;
 988
 989                 $wgOut->setArticleBodyOnly(true);
 990                 $this->view();
 991         }
 992
 993         /**
 994          * Handle action=purge
 995          */
 996         function purge() {
 997                 global $wgUser, $wgRequest, $wgOut;
 998
 999                 if ( $wgUser->isAllowed( 'purge' ) || $wgRequest->wasPosted() ) {
1000                         if( wfRunHooks( 'ArticlePurge', array( &$this ) ) ) {
1001                                 $this->doPurge();
1002                         }
1003                 } else {
1004                         $msg = $wgOut->parse( wfMsg( 'confirm_purge' ) );
1005                         $action = $this->mTitle->escapeLocalURL( 'action=purge' );
1006                         $button = htmlspecialchars( wfMsg( 'confirm_purge_button' ) );
1007                         $msg = str_replace( '$1',
1008                                 "<form method=\"post\" action=\"$action\">\n" .
1009                                 "<input type=\"submit\" name=\"submit\" value=\"$button\" />\n" .
1010                                 "</form>\n", $msg );
1011
1012                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
1013                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
1014                         $wgOut->addHTML( $msg );
1015                 }
1016         }
1017
1018         /**
1019          * Perform the actions of a page purging
1020          */
1021         function doPurge() {
1022                 global $wgUseSquid;
1023                 // Invalidate the cache
1024                 $this->mTitle->invalidateCache();
1025
1026                 if ( $wgUseSquid ) {
1027                         // Commit the transaction before the purge is sent
1028                         $dbw = wfGetDB( DB_MASTER );
1029                         $dbw->immediateCommit();
1030
1031                         // Send purge
1032                         $update = SquidUpdate::newSimplePurge( $this->mTitle );
1033                         $update->doUpdate();
1034                 }
1035                 $this->view();
1036         }
1037
1038         /**
1039          * Insert a new empty page record for this article.
1040          * This *must* be followed up by creating a revision
1041          * and running $this->updateToLatest( $rev_id );
1042          * or else the record will be left in a funky state.
1043          * Best if all done inside a transaction.
1044          *
1045          * @param Database $dbw
1046          * @return int     The newly created page_id key
1047          * @private
1048          */
1049         function insertOn( $dbw ) {
1050                 wfProfileIn( __METHOD__ );
1051
1052                 $page_id = $dbw->nextSequenceValue( 'page_page_id_seq' );
1053                 $dbw->insert( 'page', array(
1054                         'page_id'           => $page_id,
1055                         'page_namespace'    => $this->mTitle->getNamespace(),
1056                         'page_title'        => $this->mTitle->getDBkey(),
1057                         'page_counter'      => 0,
1058                         'page_restrictions' => '',
1059                         'page_is_redirect'  => 0, # Will set this shortly...
1060                         'page_is_new'       => 1,
1061                         'page_random'       => wfRandom(),
1062                         'page_touched'      => $dbw->timestamp(),
1063                         'page_latest'       => 0, # Fill this in shortly...
1064                         'page_len'          => 0, # Fill this in shortly...
1065                 ), __METHOD__ );
1066                 $newid = $dbw->insertId();
1067
1068                 $this->mTitle->resetArticleId( $newid );
1069
1070                 wfProfileOut( __METHOD__ );
1071                 return $newid;
1072         }
1073
1074         /**
1075          * Update the page record to point to a newly saved revision.
1076          *
1077          * @param Database $dbw
1078          * @param Revision $revision For ID number, and text used to set
1079                                      length and redirect status fields
1080          * @param int $lastRevision If given, will not overwrite the page field
1081          *                          when different from the currently set value.
1082          *                          Giving 0 indicates the new page flag should
1083          *                          be set on.
1084          * @param bool $lastRevIsRedirect If given, will optimize adding and
1085          *                                                      removing rows in redirect table.
1086          * @return bool true on success, false on failure
1087          * @private
1088          */
1089         function updateRevisionOn( &$dbw, $revision, $lastRevision = null, $lastRevIsRedirect = null ) {
1090                 wfProfileIn( __METHOD__ );
1091
1092                 $text = $revision->getText();
1093                 $rt = Title::newFromRedirect( $text );
1094
1095                 $conditions = array( 'page_id' => $this->getId() );
1096                 if( !is_null( $lastRevision ) ) {
1097                         # An extra check against threads stepping on each other
1098                         $conditions['page_latest'] = $lastRevision;
1099                 }
1100
1101                 $dbw->update( 'page',
1102                         array( /* SET */
1103                                 'page_latest'      => $revision->getId(),
1104                                 'page_touched'     => $dbw->timestamp(),
1105                                 'page_is_new'      => ($lastRevision === 0) ? 1 : 0,
1106                                 'page_is_redirect' => $rt !== NULL ? 1 : 0,
1107                                 'page_len'         => strlen( $text ),
1108                         ),
1109                         $conditions,
1110                         __METHOD__ );
1111
1112                 $result = $dbw->affectedRows() != 0;
1113
1114                 if ($result) {
1115                         // FIXME: Should the result from updateRedirectOn() be returned instead?
1116                         $this->updateRedirectOn( $dbw, $rt, $lastRevIsRedirect );
1117                 }
1118
1119                 wfProfileOut( __METHOD__ );
1120                 return $result;
1121         }
1122
1123         /**
1124          * Add row to the redirect table if this is a redirect, remove otherwise.
1125          *
1126          * @param Database $dbw
1127          * @param $redirectTitle a title object pointing to the redirect target,
1128          *                                                      or NULL if this is not a redirect
1129          * @param bool $lastRevIsRedirect If given, will optimize adding and
1130          *                                                      removing rows in redirect table.
1131          * @return bool true on success, false on failure
1132          * @private
1133          */
1134         function updateRedirectOn( &$dbw, $redirectTitle, $lastRevIsRedirect = null ) {
1135
1136                 // Always update redirects (target link might have changed)
1137                 // Update/Insert if we don't know if the last revision was a redirect or not
1138                 // Delete if changing from redirect to non-redirect
1139                 $isRedirect = !is_null($redirectTitle);
1140                 if ($isRedirect || is_null($lastRevIsRedirect) || $lastRevIsRedirect !== $isRedirect) {
1141
1142                         wfProfileIn( __METHOD__ );
1143
1144                         if ($isRedirect) {
1145
1146                                 // This title is a redirect, Add/Update row in the redirect table
1147                                 $set = array( /* SET */
1148                                         'rd_namespace' => $redirectTitle->getNamespace(),
1149                                         'rd_title'     => $redirectTitle->getDBkey(),
1150                                         'rd_from'      => $this->getId(),
1151                                 );
1152
1153                                 $dbw->replace( 'redirect', array( 'rd_from' ), $set, __METHOD__ );
1154                         } else {
1155                                 // This is not a redirect, remove row from redirect table
1156                                 $where = array( 'rd_from' => $this->getId() );
1157                                 $dbw->delete( 'redirect', $where, __METHOD__);
1158                         }
1159
1160                         wfProfileOut( __METHOD__ );
1161                         return ( $dbw->affectedRows() != 0 );
1162                 }
1163
1164                 return true;
1165         }
1166
1167         /**
1168          * If the given revision is newer than the currently set page_latest,
1169          * update the page record. Otherwise, do nothing.
1170          *
1171          * @param Database $dbw
1172          * @param Revision $revision
1173          */
1174         function updateIfNewerOn( &$dbw, $revision ) {
1175                 wfProfileIn( __METHOD__ );
1176
1177                 $row = $dbw->selectRow(
1178                         array( 'revision', 'page' ),
1179                         array( 'rev_id', 'rev_timestamp', 'page_is_redirect' ),
1180                         array(
1181                                 'page_id' => $this->getId(),
1182                                 'page_latest=rev_id' ),
1183                         __METHOD__ );
1184                 if( $row ) {
1185                         if( wfTimestamp(TS_MW, $row->rev_timestamp) >= $revision->getTimestamp() ) {
1186                                 wfProfileOut( __METHOD__ );
1187                                 return false;
1188                         }
1189                         $prev = $row->rev_id;
1190                         $lastRevIsRedirect = (bool)$row->page_is_redirect;
1191                 } else {
1192                         # No or missing previous revision; mark the page as new
1193                         $prev = 0;
1194                         $lastRevIsRedirect = null;
1195                 }
1196
1197                 $ret = $this->updateRevisionOn( $dbw, $revision, $prev, $lastRevIsRedirect );
1198                 wfProfileOut( __METHOD__ );
1199                 return $ret;
1200         }
1201
1202         /**
1203          * @return string Complete article text, or null if error
1204          */
1205         function replaceSection($section, $text, $summary = '', $edittime = NULL) {
1206                 wfProfileIn( __METHOD__ );
1207
1208                 if( $section == '' ) {
1209                         // Whole-page edit; let the text through unmolested.
1210                 } else {
1211                         if( is_null( $edittime ) ) {
1212                                 $rev = Revision::newFromTitle( $this->mTitle );
1213                         } else {
1214                                 $dbw = wfGetDB( DB_MASTER );
1215                                 $rev = Revision::loadFromTimestamp( $dbw, $this->mTitle, $edittime );
1216                         }
1217                         if( is_null( $rev ) ) {
1218                                 wfDebug( "Article::replaceSection asked for bogus section (page: " .
1219                                         $this->getId() . "; section: $section; edittime: $edittime)\n" );
1220                                 return null;
1221                         }
1222                         $oldtext = $rev->getText();
1223
1224                         if( $section == 'new' ) {
1225                                 # Inserting a new section
1226                                 $subject = $summary ? "== {$summary} ==\n\n" : '';
1227                                 $text = strlen( trim( $oldtext ) ) > 0
1228                                                 ? "{$oldtext}\n\n{$subject}{$text}"
1229                                                 : "{$subject}{$text}";
1230                         } else {
1231                                 # Replacing an existing section; roll out the big guns
1232                                 global $wgParser;
1233                                 $text = $wgParser->replaceSection( $oldtext, $section, $text );
1234                         }
1235
1236                 }
1237
1238                 wfProfileOut( __METHOD__ );
1239                 return $text;
1240         }
1241
1242         /**
1243          * @deprecated use Article::doEdit()
1244          */
1245         function insertNewArticle( $text, $summary, $isminor, $watchthis, $suppressRC=false, $comment=false ) {
1246                 $flags = EDIT_NEW | EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1247                         ( $isminor ? EDIT_MINOR : 0 ) |
1248                         ( $suppressRC ? EDIT_SUPPRESS_RC : 0 );
1249
1250                 # If this is a comment, add the summary as headline
1251                 if ( $comment && $summary != "" ) {
1252                         $text = "== {$summary} ==\n\n".$text;
1253                 }
1254
1255                 $this->doEdit( $text, $summary, $flags );
1256
1257                 $dbw = wfGetDB( DB_MASTER );
1258                 if ($watchthis) {
1259                         if (!$this->mTitle->userIsWatching()) {
1260                                 $dbw->begin();
1261                                 $this->doWatch();
1262                                 $dbw->commit();
1263                         }
1264                 } else {
1265                         if ( $this->mTitle->userIsWatching() ) {
1266                                 $dbw->begin();
1267                                 $this->doUnwatch();
1268                                 $dbw->commit();
1269                         }
1270                 }
1271                 $this->doRedirect( $this->isRedirect( $text ) );
1272         }
1273
1274         /**
1275          * @deprecated use Article::doEdit()
1276          */
1277         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
1278                 $flags = EDIT_UPDATE | EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1279                         ( $minor ? EDIT_MINOR : 0 ) |
1280                         ( $forceBot ? EDIT_FORCE_BOT : 0 );
1281
1282                 $good = $this->doEdit( $text, $summary, $flags );
1283                 if ( $good ) {
1284                         $dbw = wfGetDB( DB_MASTER );
1285                         if ($watchthis) {
1286                                 if (!$this->mTitle->userIsWatching()) {
1287                                         $dbw->begin();
1288                                         $this->doWatch();
1289                                         $dbw->commit();
1290                                 }
1291                         } else {
1292                                 if ( $this->mTitle->userIsWatching() ) {
1293                                         $dbw->begin();
1294                                         $this->doUnwatch();
1295                                         $dbw->commit();
1296                                 }
1297                         }
1298
1299                         $extraq = ''; // Give extensions a chance to modify URL query on update
1300                         wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this, &$sectionanchor, &$extraq ) );
1301
1302                         $this->doRedirect( $this->isRedirect( $text ), $sectionanchor, $extraq );
1303                 }
1304                 return $good;
1305         }
1306
1307         /**
1308          * Article::doEdit()
1309          *
1310          * Change an existing article or create a new article. Updates RC and all necessary caches,
1311          * optionally via the deferred update array.
1312          *
1313          * $wgUser must be set before calling this function.
1314          *
1315          * @param string $text New text
1316          * @param string $summary Edit summary
1317          * @param integer $flags bitfield:
1318          *      EDIT_NEW
1319          *          Article is known or assumed to be non-existent, create a new one
1320          *      EDIT_UPDATE
1321          *          Article is known or assumed to be pre-existing, update it
1322          *      EDIT_MINOR
1323          *          Mark this edit minor, if the user is allowed to do so
1324          *      EDIT_SUPPRESS_RC
1325          *          Do not log the change in recentchanges
1326          *      EDIT_FORCE_BOT
1327          *          Mark the edit a "bot" edit regardless of user rights
1328          *      EDIT_DEFER_UPDATES
1329          *          Defer some of the updates until the end of index.php
1330          *      EDIT_AUTOSUMMARY
1331          *          Fill in blank summaries with generated text where possible
1332          *
1333          * If neither EDIT_NEW nor EDIT_UPDATE is specified, the status of the article will be detected.
1334          * If EDIT_UPDATE is specified and the article doesn't exist, the function will return false. If
1335          * EDIT_NEW is specified and the article does exist, a duplicate key error will cause an exception
1336          * to be thrown from the Database. These two conditions are also possible with auto-detection due
1337          * to MediaWiki's performance-optimised locking strategy.
1338          *
1339          * @return bool success
1340          */
1341         function doEdit( $text, $summary, $flags = 0 ) {
1342                 global $wgUser, $wgDBtransactions;
1343
1344                 wfProfileIn( __METHOD__ );
1345                 $good = true;
1346
1347                 if ( !($flags & EDIT_NEW) && !($flags & EDIT_UPDATE) ) {
1348                         $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
1349                         if ( $aid ) {
1350                                 $flags |= EDIT_UPDATE;
1351                         } else {
1352                                 $flags |= EDIT_NEW;
1353                         }
1354                 }
1355
1356                 if( !wfRunHooks( 'ArticleSave', array( &$this, &$wgUser, &$text,
1357                         &$summary, $flags & EDIT_MINOR,
1358                         null, null, &$flags ) ) )
1359                 {
1360                         wfDebug( __METHOD__ . ": ArticleSave hook aborted save!\n" );
1361                         wfProfileOut( __METHOD__ );
1362                         return false;
1363                 }
1364
1365                 # Silently ignore EDIT_MINOR if not allowed
1366                 $isminor = ( $flags & EDIT_MINOR ) && $wgUser->isAllowed('minoredit');
1367                 $bot = $wgUser->isAllowed( 'bot' ) || ( $flags & EDIT_FORCE_BOT );
1368
1369                 $oldtext = $this->getContent();
1370                 $oldsize = strlen( $oldtext );
1371
1372                 # Provide autosummaries if one is not provided.
1373                 if ($flags & EDIT_AUTOSUMMARY && $summary == '')
1374                         $summary = $this->getAutosummary( $oldtext, $text, $flags );
1375
1376                 $text = $this->preSaveTransform( $text );
1377                 $newsize = strlen( $text );
1378
1379                 $dbw = wfGetDB( DB_MASTER );
1380                 $now = wfTimestampNow();
1381
1382                 if ( $flags & EDIT_UPDATE ) {
1383                         # Update article, but only if changed.
1384
1385                         # Make sure the revision is either completely inserted or not inserted at all
1386                         if( !$wgDBtransactions ) {
1387                                 $userAbort = ignore_user_abort( true );
1388                         }
1389
1390                         $lastRevision = 0;
1391                         $revisionId = 0;
1392
1393                         if ( 0 != strcmp( $text, $oldtext ) ) {
1394                                 $this->mGoodAdjustment = (int)$this->isCountable( $text )
1395                                   - (int)$this->isCountable( $oldtext );
1396                                 $this->mTotalAdjustment = 0;
1397
1398                                 $lastRevision = $dbw->selectField(
1399                                         'page', 'page_latest', array( 'page_id' => $this->getId() ) );
1400
1401                                 if ( !$lastRevision ) {
1402                                         # Article gone missing
1403                                         wfDebug( __METHOD__.": EDIT_UPDATE specified but article doesn't exist\n" );
1404                                         wfProfileOut( __METHOD__ );
1405                                         return false;
1406                                 }
1407
1408                                 $revision = new Revision( array(
1409                                         'page'       => $this->getId(),
1410                                         'comment'    => $summary,
1411                                         'minor_edit' => $isminor,
1412                                         'text'       => $text
1413                                         ) );
1414
1415                                 $dbw->begin();
1416                                 $revisionId = $revision->insertOn( $dbw );
1417
1418                                 # Update page
1419                                 $ok = $this->updateRevisionOn( $dbw, $revision, $lastRevision );
1420
1421                                 if( !$ok ) {
1422                                         /* Belated edit conflict! Run away!! */
1423                                         $good = false;
1424                                         $dbw->rollback();
1425                                 } else {
1426                                         # Update recentchanges
1427                                         if( !( $flags & EDIT_SUPPRESS_RC ) ) {
1428                                                 $rcid = RecentChange::notifyEdit( $now, $this->mTitle, $isminor, $wgUser, $summary,
1429                                                         $lastRevision, $this->getTimestamp(), $bot, '', $oldsize, $newsize,
1430                                                         $revisionId );
1431
1432                                                 # Mark as patrolled if the user can do so
1433                                                 if( $GLOBALS['wgUseRCPatrol'] && $wgUser->isAllowed( 'autopatrol' ) ) {
1434                                                         RecentChange::markPatrolled( $rcid );
1435                                                         PatrolLog::record( $rcid, true );
1436                                                 }
1437                                         }
1438                                         $wgUser->incEditCount();
1439                                         $dbw->commit();
1440                                 }
1441                         } else {
1442                                 $revision = null;
1443                                 // Keep the same revision ID, but do some updates on it
1444                                 $revisionId = $this->getRevIdFetched();
1445                                 // Update page_touched, this is usually implicit in the page update
1446                                 // Other cache updates are done in onArticleEdit()
1447                                 $this->mTitle->invalidateCache();
1448                         }
1449
1450                         if( !$wgDBtransactions ) {
1451                                 ignore_user_abort( $userAbort );
1452                         }
1453
1454                         if ( $good ) {
1455                                 # Invalidate cache of this article and all pages using this article
1456                                 # as a template. Partly deferred.
1457                                 Article::onArticleEdit( $this->mTitle );
1458
1459                                 # Update links tables, site stats, etc.
1460                                 $changed = ( strcmp( $oldtext, $text ) != 0 );
1461                                 $this->editUpdates( $text, $summary, $isminor, $now, $revisionId, $changed );
1462                         }
1463                 } else {
1464                         # Create new article
1465
1466                         # Set statistics members
1467                         # We work out if it's countable after PST to avoid counter drift
1468                         # when articles are created with {{subst:}}
1469                         $this->mGoodAdjustment = (int)$this->isCountable( $text );
1470                         $this->mTotalAdjustment = 1;
1471
1472                         $dbw->begin();
1473
1474                         # Add the page record; stake our claim on this title!
1475                         # This will fail with a database query exception if the article already exists
1476                         $newid = $this->insertOn( $dbw );
1477
1478                         # Save the revision text...
1479                         $revision = new Revision( array(
1480                                 'page'       => $newid,
1481                                 'comment'    => $summary,
1482                                 'minor_edit' => $isminor,
1483                                 'text'       => $text
1484                                 ) );
1485                         $revisionId = $revision->insertOn( $dbw );
1486
1487                         $this->mTitle->resetArticleID( $newid );
1488
1489                         # Update the page record with revision data
1490                         $this->updateRevisionOn( $dbw, $revision, 0 );
1491
1492                         if( !( $flags & EDIT_SUPPRESS_RC ) ) {
1493                                 $rcid = RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary, $bot,
1494                                   '', strlen( $text ), $revisionId );
1495                                 # Mark as patrolled if the user can
1496                                 if( $GLOBALS['wgUseRCPatrol'] && $wgUser->isAllowed( 'autopatrol' ) ) {
1497                                         RecentChange::markPatrolled( $rcid );
1498                                         PatrolLog::record( $rcid, true );
1499                                 }
1500                         }
1501                         $wgUser->incEditCount();
1502                         $dbw->commit();
1503
1504                         # Update links, etc.
1505                         $this->editUpdates( $text, $summary, $isminor, $now, $revisionId, true );
1506
1507                         # Clear caches
1508                         Article::onArticleCreate( $this->mTitle );
1509
1510                         wfRunHooks( 'ArticleInsertComplete', array( &$this, &$wgUser, $text, $summary,
1511                          $flags & EDIT_MINOR, null, null, &$flags, $revision ) );
1512                 }
1513
1514                 if ( $good && !( $flags & EDIT_DEFER_UPDATES ) ) {
1515                         wfDoUpdates();
1516                 }
1517
1518                 wfRunHooks( 'ArticleSaveComplete', array( &$this, &$wgUser, $text, $summary,
1519                         $flags & EDIT_MINOR, null, null, &$flags, $revision ) );
1520
1521                 wfProfileOut( __METHOD__ );
1522                 return $good;
1523         }
1524
1525         /**
1526          * @deprecated wrapper for doRedirect
1527          */
1528         function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid ) {
1529                 $this->doRedirect( $this->isRedirect( $text ), $sectionanchor );
1530         }
1531
1532         /**
1533          * Output a redirect back to the article.
1534          * This is typically used after an edit.
1535          *
1536          * @param boolean $noRedir Add redirect=no
1537          * @param string $sectionAnchor section to redirect to, including "#"
1538          */
1539         function doRedirect( $noRedir = false, $sectionAnchor = '', $extraq = '' ) {
1540                 global $wgOut;
1541                 if ( $noRedir ) {
1542                         $query = 'redirect=no';
1543                         if( $extraq )
1544                                 $query .= "&$query";
1545                 } else {
1546                         $query = $extraq;
1547                 }
1548                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $sectionAnchor );
1549         }
1550
1551         /**
1552          * Mark this particular edit as patrolled
1553          */
1554         function markpatrolled() {
1555                 global $wgOut, $wgRequest, $wgUseRCPatrol, $wgUser;
1556                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1557
1558                 # Check RC patrol config. option
1559                 if( !$wgUseRCPatrol ) {
1560                         $wgOut->errorPage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1561                         return;
1562                 }
1563
1564                 # Check permissions
1565                 if( !$wgUser->isAllowed( 'patrol' ) ) {
1566                         $wgOut->permissionRequired( 'patrol' );
1567                         return;
1568                 }
1569
1570                 # If we haven't been given an rc_id value, we can't do anything
1571                 $rcid = $wgRequest->getVal( 'rcid' );
1572                 if( !$rcid ) {
1573                         $wgOut->errorPage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1574                         return;
1575                 }
1576
1577                 # Handle the 'MarkPatrolled' hook
1578                 if( !wfRunHooks( 'MarkPatrolled', array( $rcid, &$wgUser, false ) ) ) {
1579                         return;
1580                 }
1581
1582                 $return = SpecialPage::getTitleFor( 'Recentchanges' );
1583                 # If it's left up to us, check that the user is allowed to patrol this edit
1584                 # If the user has the "autopatrol" right, then we'll assume there are no
1585                 # other conditions stopping them doing so
1586                 if( !$wgUser->isAllowed( 'autopatrol' ) ) {
1587                         $rc = RecentChange::newFromId( $rcid );
1588                         # Graceful error handling, as we've done before here...
1589                         # (If the recent change doesn't exist, then it doesn't matter whether
1590                         # the user is allowed to patrol it or not; nothing is going to happen
1591                         if( is_object( $rc ) && $wgUser->getName() == $rc->getAttribute( 'rc_user_text' ) ) {
1592                                 # The user made this edit, and can't patrol it
1593                                 # Tell them so, and then back off
1594                                 $wgOut->setPageTitle( wfMsg( 'markedaspatrollederror' ) );
1595                                 $wgOut->addWikiText( wfMsgNoTrans( 'markedaspatrollederror-noautopatrol' ) );
1596                                 $wgOut->returnToMain( false, $return );
1597                                 return;
1598                         }
1599                 }
1600
1601                 # Mark the edit as patrolled
1602                 RecentChange::markPatrolled( $rcid );
1603                 PatrolLog::record( $rcid );
1604                 wfRunHooks( 'MarkPatrolledComplete', array( &$rcid, &$wgUser, false ) );
1605
1606                 # Inform the user
1607                 $wgOut->setPageTitle( wfMsg( 'markedaspatrolled' ) );
1608                 $wgOut->addWikiText( wfMsgNoTrans( 'markedaspatrolledtext' ) );
1609                 $wgOut->returnToMain( false, $return );
1610         }
1611
1612         /**
1613          * User-interface handler for the "watch" action
1614          */
1615
1616         function watch() {
1617
1618                 global $wgUser, $wgOut;
1619
1620                 if ( $wgUser->isAnon() ) {
1621                         $wgOut->showErrorPage( 'watchnologin', 'watchnologintext' );
1622                         return;
1623                 }
1624                 if ( wfReadOnly() ) {
1625                         $wgOut->readOnlyPage();
1626                         return;
1627                 }
1628
1629                 if( $this->doWatch() ) {
1630                         $wgOut->setPagetitle( wfMsg( 'addedwatch' ) );
1631                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
1632
1633                         $link = wfEscapeWikiText( $this->mTitle->getPrefixedText() );
1634                         $text = wfMsg( 'addedwatchtext', $link );
1635                         $wgOut->addWikiText( $text );
1636                 }
1637
1638                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1639         }
1640
1641         /**
1642          * Add this page to $wgUser's watchlist
1643          * @return bool true on successful watch operation
1644          */
1645         function doWatch() {
1646                 global $wgUser;
1647                 if( $wgUser->isAnon() ) {
1648                         return false;
1649                 }
1650
1651                 if (wfRunHooks('WatchArticle', array(&$wgUser, &$this))) {
1652                         $wgUser->addWatch( $this->mTitle );
1653
1654                         return wfRunHooks('WatchArticleComplete', array(&$wgUser, &$this));
1655                 }
1656
1657                 return false;
1658         }
1659
1660         /**
1661          * User interface handler for the "unwatch" action.
1662          */
1663         function unwatch() {
1664
1665                 global $wgUser, $wgOut;
1666
1667                 if ( $wgUser->isAnon() ) {
1668                         $wgOut->showErrorPage( 'watchnologin', 'watchnologintext' );
1669                         return;
1670                 }
1671                 if ( wfReadOnly() ) {
1672                         $wgOut->readOnlyPage();
1673                         return;
1674                 }
1675
1676                 if( $this->doUnwatch() ) {
1677                         $wgOut->setPagetitle( wfMsg( 'removedwatch' ) );
1678                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
1679
1680                         $link = wfEscapeWikiText( $this->mTitle->getPrefixedText() );
1681                         $text = wfMsg( 'removedwatchtext', $link );
1682                         $wgOut->addWikiText( $text );
1683                 }
1684
1685                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1686         }
1687
1688         /**
1689          * Stop watching a page
1690          * @return bool true on successful unwatch
1691          */
1692         function doUnwatch() {
1693                 global $wgUser;
1694                 if( $wgUser->isAnon() ) {
1695                         return false;
1696                 }
1697
1698                 if (wfRunHooks('UnwatchArticle', array(&$wgUser, &$this))) {
1699                         $wgUser->removeWatch( $this->mTitle );
1700
1701                         return wfRunHooks('UnwatchArticleComplete', array(&$wgUser, &$this));
1702                 }
1703
1704                 return false;
1705         }
1706
1707         /**
1708          * action=protect handler
1709          */
1710         function protect() {
1711                 $form = new ProtectionForm( $this );
1712                 $form->execute();
1713         }
1714
1715         /**
1716          * action=unprotect handler (alias)
1717          */
1718         function unprotect() {
1719                 $this->protect();
1720         }
1721
1722         /**
1723          * Update the article's restriction field, and leave a log entry.
1724          *
1725          * @param array $limit set of restriction keys
1726          * @param string $reason
1727          * @return bool true on success
1728          */
1729         function updateRestrictions( $limit = array(), $reason = '', $cascade = 0, $expiry = null ) {
1730                 global $wgUser, $wgRestrictionTypes, $wgContLang;
1731
1732                 $id = $this->mTitle->getArticleID();
1733                 if( !$wgUser->isAllowed( 'protect' ) || wfReadOnly() || $id == 0 ) {
1734                         return false;
1735                 }
1736
1737                 if (!$cascade) {
1738                         $cascade = false;
1739                 }
1740
1741                 // Take this opportunity to purge out expired restrictions
1742                 Title::purgeExpiredRestrictions();
1743
1744                 # FIXME: Same limitations as described in ProtectionForm.php (line 37);
1745                 # we expect a single selection, but the schema allows otherwise.
1746                 $current = array();
1747                 foreach( $wgRestrictionTypes as $action )
1748                         $current[$action] = implode( '', $this->mTitle->getRestrictions( $action ) );
1749
1750                 $current = Article::flattenRestrictions( $current );
1751                 $updated = Article::flattenRestrictions( $limit );
1752
1753                 $changed = ( $current != $updated );
1754                 $changed = $changed || ($this->mTitle->areRestrictionsCascading() != $cascade);
1755                 $changed = $changed || ($this->mTitle->mRestrictionsExpiry != $expiry);
1756                 $protect = ( $updated != '' );
1757
1758                 # If nothing's changed, do nothing
1759                 if( $changed ) {
1760                         global $wgGroupPermissions;
1761                         if( wfRunHooks( 'ArticleProtect', array( &$this, &$wgUser, $limit, $reason ) ) ) {
1762
1763                                 $dbw = wfGetDB( DB_MASTER );
1764
1765                                 $encodedExpiry = Block::encodeExpiry($expiry, $dbw );
1766
1767                                 $expiry_description = '';
1768                                 if ( $encodedExpiry != 'infinity' ) {
1769                                         $expiry_description = ' (' . wfMsgForContent( 'protect-expiring', $wgContLang->timeanddate( $expiry ) ).')';
1770                                 }
1771
1772                                 # Prepare a null revision to be added to the history
1773                                 $modified = $current != '' && $protect;
1774                                 if ( $protect ) {
1775                                         $comment_type = $modified ? 'modifiedarticleprotection' : 'protectedarticle';
1776                                 } else {
1777                                         $comment_type = 'unprotectedarticle';
1778                                 }
1779                                 $comment = $wgContLang->ucfirst( wfMsgForContent( $comment_type, $this->mTitle->getPrefixedText() ) );
1780
1781                                 foreach( $limit as $action => $restrictions ) {
1782                                         # Check if the group level required to edit also can protect pages
1783                                         # Otherwise, people who cannot normally protect can "protect" pages via transclusion
1784                                         $cascade = ( $cascade && isset($wgGroupPermissions[$restrictions]['protect']) && $wgGroupPermissions[$restrictions]['protect'] );
1785                                 }
1786
1787                                 $cascade_description = '';
1788                                 if ($cascade) {
1789                                         $cascade_description = ' ['.wfMsg('protect-summary-cascade').']';
1790                                 }
1791
1792                                 if( $reason )
1793                                         $comment .= ": $reason";
1794                                 if( $protect )
1795                                         $comment .= " [$updated]";
1796                                 if ( $expiry_description && $protect )
1797                                         $comment .= "$expiry_description";
1798                                 if ( $cascade )
1799                                         $comment .= "$cascade_description";
1800
1801                                 $nullRevision = Revision::newNullRevision( $dbw, $id, $comment, true );
1802                                 $nullRevId = $nullRevision->insertOn( $dbw );
1803
1804                                 # Update restrictions table
1805                                 foreach( $limit as $action => $restrictions ) {
1806                                         if ($restrictions != '' ) {
1807                                                 $dbw->replace( 'page_restrictions', array(array('pr_page', 'pr_type')),
1808                                                         array( 'pr_page' => $id, 'pr_type' => $action
1809                                                                 , 'pr_level' => $restrictions, 'pr_cascade' => $cascade ? 1 : 0
1810                                                                 , 'pr_expiry' => $encodedExpiry ), __METHOD__  );
1811                                         } else {
1812                                                 $dbw->delete( 'page_restrictions', array( 'pr_page' => $id,
1813                                                         'pr_type' => $action ), __METHOD__ );
1814                                         }
1815                                 }
1816
1817                                 # Update page record
1818                                 $dbw->update( 'page',
1819                                         array( /* SET */
1820                                                 'page_touched' => $dbw->timestamp(),
1821                                                 'page_restrictions' => '',
1822                                                 'page_latest' => $nullRevId
1823                                         ), array( /* WHERE */
1824                                                 'page_id' => $id
1825                                         ), 'Article::protect'
1826                                 );
1827                                 wfRunHooks( 'ArticleProtectComplete', array( &$this, &$wgUser, $limit, $reason ) );
1828
1829                                 # Update the protection log
1830                                 $log = new LogPage( 'protect' );
1831
1832                                 if( $protect ) {
1833                                         $log->addEntry( $modified ? 'modify' : 'protect', $this->mTitle, trim( $reason . " [$updated]$cascade_description$expiry_description" ) );
1834                                 } else {
1835                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1836                                 }
1837
1838                         } # End hook
1839                 } # End "changed" check
1840
1841                 return true;
1842         }
1843
1844         /**
1845          * Take an array of page restrictions and flatten it to a string
1846          * suitable for insertion into the page_restrictions field.
1847          * @param array $limit
1848          * @return string
1849          * @private
1850          */
1851         function flattenRestrictions( $limit ) {
1852                 if( !is_array( $limit ) ) {
1853                         throw new MWException( 'Article::flattenRestrictions given non-array restriction set' );
1854                 }
1855                 $bits = array();
1856                 ksort( $limit );
1857                 foreach( $limit as $action => $restrictions ) {
1858                         if( $restrictions != '' ) {
1859                                 $bits[] = "$action=$restrictions";
1860                         }
1861                 }
1862                 return implode( ':', $bits );
1863         }
1864
1865         /*
1866          * UI entry point for page deletion
1867          */
1868         function delete() {
1869                 global $wgUser, $wgOut, $wgRequest;
1870                 $confirm = $wgRequest->wasPosted() &&
1871                         $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
1872                 $reason = $wgRequest->getText( 'wpReason' );
1873
1874                 # This code desperately needs to be totally rewritten
1875
1876                 # Check permissions
1877                 if( $wgUser->isAllowed( 'delete' ) ) {
1878                         if( $wgUser->isBlocked( !$confirm ) ) {
1879                                 $wgOut->blockedPage();
1880                                 return;
1881                         }
1882                 } else {
1883                         $wgOut->permissionRequired( 'delete' );
1884                         return;
1885                 }
1886
1887                 if( wfReadOnly() ) {
1888                         $wgOut->readOnlyPage();
1889                         return;
1890                 }
1891
1892                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1893
1894                 # Better double-check that it hasn't been deleted yet!
1895                 $dbw = wfGetDB( DB_MASTER );
1896                 $conds = $this->mTitle->pageCond();
1897                 $latest = $dbw->selectField( 'page', 'page_latest', $conds, __METHOD__ );
1898                 if ( $latest === false ) {
1899                         $wgOut->showFatalError( wfMsg( 'cannotdelete' ) );
1900                         return;
1901                 }
1902
1903                 if( $confirm ) {
1904                         $this->doDelete( $reason );
1905                         if( $wgRequest->getCheck( 'wpWatch' ) ) {
1906                                 $this->doWatch();
1907                         } elseif( $this->mTitle->userIsWatching() ) {
1908                                 $this->doUnwatch();
1909                         }
1910                         return;
1911                 }
1912
1913                 # determine whether this page has earlier revisions
1914                 # and insert a warning if it does
1915                 $maxRevisions = 20;
1916                 $authors = $this->getLastNAuthors( $maxRevisions, $latest );
1917
1918                 if( count( $authors ) > 1 && !$confirm ) {
1919                         $skin=$wgUser->getSkin();
1920                         $wgOut->addHTML( '<strong>' . wfMsg( 'historywarning' ) . ' ' . $skin->historyLink() . '</strong>' );
1921                 }
1922
1923                 # If a single user is responsible for all revisions, find out who they are
1924                 if ( count( $authors ) == $maxRevisions ) {
1925                         // Query bailed out, too many revisions to find out if they're all the same
1926                         $authorOfAll = false;
1927                 } else {
1928                         $authorOfAll = reset( $authors );
1929                         foreach ( $authors as $author ) {
1930                                 if ( $authorOfAll != $author ) {
1931                                         $authorOfAll = false;
1932                                         break;
1933                                 }
1934                         }
1935                 }
1936                 # Fetch article text
1937                 $rev = Revision::newFromTitle( $this->mTitle );
1938
1939                 if( !is_null( $rev ) ) {
1940                         # if this is a mini-text, we can paste part of it into the deletion reason
1941                         $text = $rev->getText();
1942
1943                         #if this is empty, an earlier revision may contain "useful" text
1944                         $blanked = false;
1945                         if( $text == '' ) {
1946                                 $prev = $rev->getPrevious();
1947                                 if( $prev ) {
1948                                         $text = $prev->getText();
1949                                         $blanked = true;
1950                                 }
1951                         }
1952
1953                         $length = strlen( $text );
1954
1955                         # this should not happen, since it is not possible to store an empty, new
1956                         # page. Let's insert a standard text in case it does, though
1957                         if( $length == 0 && $reason === '' ) {
1958                                 $reason = wfMsgForContent( 'exblank' );
1959                         }
1960
1961                         if( $reason === '' ) {
1962                                 # comment field=255, let's grep the first 150 to have some user
1963                                 # space left
1964                                 global $wgContLang;
1965                                 $text = $wgContLang->truncate( $text, 150, '...' );
1966
1967                                 # let's strip out newlines
1968                                 $text = preg_replace( "/[\n\r]/", '', $text );
1969
1970                                 if( !$blanked ) {
1971                                         if( $authorOfAll === false ) {
1972                                                 $reason = wfMsgForContent( 'excontent', $text );
1973                                         } else {
1974                                                 $reason = wfMsgForContent( 'excontentauthor', $text, $authorOfAll );
1975                                         }
1976                                 } else {
1977                                         $reason = wfMsgForContent( 'exbeforeblank', $text );
1978                                 }
1979                         }
1980                 }
1981
1982                 return $this->confirmDelete( '', $reason );
1983         }
1984
1985         /**
1986          * Get the last N authors
1987          * @param int $num Number of revisions to get
1988          * @param string $revLatest The latest rev_id, selected from the master (optional)
1989          * @return array Array of authors, duplicates not removed
1990          */
1991         function getLastNAuthors( $num, $revLatest = 0 ) {
1992                 wfProfileIn( __METHOD__ );
1993
1994                 // First try the slave
1995                 // If that doesn't have the latest revision, try the master
1996                 $continue = 2;
1997                 $db = wfGetDB( DB_SLAVE );
1998                 do {
1999                         $res = $db->select( array( 'page', 'revision' ),
2000                                 array( 'rev_id', 'rev_user_text' ),
2001                                 array(
2002                                         'page_namespace' => $this->mTitle->getNamespace(),
2003                                         'page_title' => $this->mTitle->getDBkey(),
2004                                         'rev_page = page_id'
2005                                 ), __METHOD__, $this->getSelectOptions( array(
2006                                         'ORDER BY' => 'rev_timestamp DESC',
2007                                         'LIMIT' => $num
2008                                 ) )
2009                         );
2010                         if ( !$res ) {
2011                                 wfProfileOut( __METHOD__ );
2012                                 return array();
2013                         }
2014                         $row = $db->fetchObject( $res );
2015                         if ( $continue == 2 && $revLatest && $row->rev_id != $revLatest ) {
2016                                 $db = wfGetDB( DB_MASTER );
2017                                 $continue--;
2018                         } else {
2019                                 $continue = 0;
2020                         }
2021                 } while ( $continue );
2022
2023                 $authors = array( $row->rev_user_text );
2024                 while ( $row = $db->fetchObject( $res ) ) {
2025                         $authors[] = $row->rev_user_text;
2026                 }
2027                 wfProfileOut( __METHOD__ );
2028                 return $authors;
2029         }
2030
2031         /**
2032          * Output deletion confirmation dialog
2033          */
2034         function confirmDelete( $par, $reason ) {
2035                 global $wgOut, $wgUser;
2036
2037                 wfDebug( "Article::confirmDelete\n" );
2038
2039                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
2040                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
2041                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
2042                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
2043
2044                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
2045
2046                 $confirm = htmlspecialchars( wfMsg( 'deletepage' ) );
2047                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
2048                 $token = htmlspecialchars( $wgUser->editToken() );
2049                 $watch = Xml::checkLabel( wfMsg( 'watchthis' ), 'wpWatch', 'wpWatch', $wgUser->getBoolOption( 'watchdeletion' ) || $this->mTitle->userIsWatching(), array( 'tabindex' => '2' ) );
2050
2051                 $wgOut->addHTML( "
2052 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
2053         <table border='0'>
2054                 <tr>
2055                         <td align='right'>
2056                                 <label for='wpReason'>{$delcom}:</label>
2057                         </td>
2058                         <td align='left'>
2059                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" tabindex=\"1\" />
2060                         </td>
2061                 </tr>
2062                 <tr>
2063                         <td>&nbsp;</td>
2064                         <td>$watch</td>
2065                 </tr>
2066                 <tr>
2067                         <td>&nbsp;</td>
2068                         <td>
2069                                 <input type='submit' name='wpConfirmB' id='wpConfirmB' value=\"{$confirm}\" tabindex=\"3\" />
2070                         </td>
2071                 </tr>
2072         </table>
2073         <input type='hidden' name='wpEditToken' value=\"{$token}\" />
2074 </form>\n" );
2075
2076                 $wgOut->returnToMain( false );
2077
2078                 $this->showLogExtract( $wgOut );
2079         }
2080
2081
2082         /**
2083          * Show relevant lines from the deletion log
2084          */
2085         function showLogExtract( $out ) {
2086                 $out->addHtml( '<h2>' . htmlspecialchars( LogPage::logName( 'delete' ) ) . '</h2>' );
2087                 $logViewer = new LogViewer(
2088                         new LogReader(
2089                                 new FauxRequest(
2090                                         array( 'page' => $this->mTitle->getPrefixedText(),
2091                                                'type' => 'delete' ) ) ) );
2092                 $logViewer->showList( $out );
2093         }
2094
2095
2096         /**
2097          * Perform a deletion and output success or failure messages
2098          */
2099         function doDelete( $reason ) {
2100                 global $wgOut, $wgUser;
2101                 wfDebug( __METHOD__."\n" );
2102
2103                 if (wfRunHooks('ArticleDelete', array(&$this, &$wgUser, &$reason))) {
2104                         if ( $this->doDeleteArticle( $reason ) ) {
2105                                 $deleted = wfEscapeWikiText( $this->mTitle->getPrefixedText() );
2106
2107                                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
2108                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
2109
2110                                 $loglink = '[[Special:Log/delete|' . wfMsg( 'deletionlog' ) . ']]';
2111                                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
2112
2113                                 $wgOut->addWikiText( $text );
2114                                 $wgOut->returnToMain( false );
2115                                 wfRunHooks('ArticleDeleteComplete', array(&$this, &$wgUser, $reason));
2116                         } else {
2117                                 $wgOut->showFatalError( wfMsg( 'cannotdelete' ) );
2118                         }
2119                 }
2120         }
2121
2122         /**
2123          * Back-end article deletion
2124          * Deletes the article with database consistency, writes logs, purges caches
2125          * Returns success
2126          */
2127         function doDeleteArticle( $reason ) {
2128                 global $wgUseSquid, $wgDeferredUpdateList;
2129                 global $wgUseTrackbacks;
2130
2131                 wfDebug( __METHOD__."\n" );
2132
2133                 $dbw = wfGetDB( DB_MASTER );
2134                 $ns = $this->mTitle->getNamespace();
2135                 $t = $this->mTitle->getDBkey();
2136                 $id = $this->mTitle->getArticleID();
2137
2138                 if ( $t == '' || $id == 0 ) {
2139                         return false;
2140                 }
2141
2142                 $u = new SiteStatsUpdate( 0, 1, -(int)$this->isCountable( $this->getContent() ), -1 );
2143                 array_push( $wgDeferredUpdateList, $u );
2144
2145                 // For now, shunt the revision data into the archive table.
2146                 // Text is *not* removed from the text table; bulk storage
2147                 // is left intact to avoid breaking block-compression or
2148                 // immutable storage schemes.
2149                 //
2150                 // For backwards compatibility, note that some older archive
2151                 // table entries will have ar_text and ar_flags fields still.
2152                 //
2153                 // In the future, we may keep revisions and mark them with
2154                 // the rev_deleted field, which is reserved for this purpose.
2155                 $dbw->insertSelect( 'archive', array( 'page', 'revision' ),
2156                         array(
2157                                 'ar_namespace'  => 'page_namespace',
2158                                 'ar_title'      => 'page_title',
2159                                 'ar_comment'    => 'rev_comment',
2160                                 'ar_user'       => 'rev_user',
2161                                 'ar_user_text'  => 'rev_user_text',
2162                                 'ar_timestamp'  => 'rev_timestamp',
2163                                 'ar_minor_edit' => 'rev_minor_edit',
2164                                 'ar_rev_id'     => 'rev_id',
2165                                 'ar_text_id'    => 'rev_text_id',
2166                                 'ar_text'       => '\'\'', // Be explicit to appease
2167                                 'ar_flags'      => '\'\'', // MySQL's "strict mode"...
2168                                 'ar_len'                => 'rev_len',
2169                                 'ar_page_id'    => 'page_id',
2170                         ), array(
2171                                 'page_id' => $id,
2172                                 'page_id = rev_page'
2173                         ), __METHOD__
2174                 );
2175
2176                 # Delete restrictions for it
2177                 $dbw->delete( 'page_restrictions', array ( 'pr_page' => $id ), __METHOD__ );
2178
2179                 # Now that it's safely backed up, delete it
2180                 $dbw->delete( 'page', array( 'page_id' => $id ), __METHOD__);
2181
2182                 # If using cascading deletes, we can skip some explicit deletes
2183                 if ( !$dbw->cascadingDeletes() ) {
2184
2185                         $dbw->delete( 'revision', array( 'rev_page' => $id ), __METHOD__ );
2186
2187                         if ($wgUseTrackbacks)
2188                                 $dbw->delete( 'trackbacks', array( 'tb_page' => $id ), __METHOD__ );
2189
2190                         # Delete outgoing links
2191                         $dbw->delete( 'pagelinks', array( 'pl_from' => $id ) );
2192                         $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
2193                         $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
2194                         $dbw->delete( 'templatelinks', array( 'tl_from' => $id ) );
2195                         $dbw->delete( 'externallinks', array( 'el_from' => $id ) );
2196                         $dbw->delete( 'langlinks', array( 'll_from' => $id ) );
2197                         $dbw->delete( 'redirect', array( 'rd_from' => $id ) );
2198                 }
2199
2200                 # If using cleanup triggers, we can skip some manual deletes
2201                 if ( !$dbw->cleanupTriggers() ) {
2202
2203                         # Clean up recentchanges entries...
2204                         $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), __METHOD__ );
2205                 }
2206
2207                 # Clear caches
2208                 Article::onArticleDelete( $this->mTitle );
2209
2210                 # Log the deletion
2211                 $log = new LogPage( 'delete' );
2212                 $log->addEntry( 'delete', $this->mTitle, $reason );
2213
2214                 # Clear the cached article id so the interface doesn't act like we exist
2215                 $this->mTitle->resetArticleID( 0 );
2216                 $this->mTitle->mArticleID = 0;
2217                 return true;
2218         }
2219
2220         /**
2221          * Roll back the most recent consecutive set of edits to a page
2222          * from the same user; fails if there are no eligible edits to
2223          * roll back to, e.g. user is the sole contributor
2224          *
2225          * @param string $fromP - Name of the user whose edits to rollback.
2226          * @param string $summary - Custom summary. Set to default summary if empty.
2227          * @param string $token - Rollback token.
2228          * @param bool $bot - If true, mark all reverted edits as bot.
2229          *
2230          * @param array $resultDetails contains result-specific dict of additional values
2231          *    ALREADY_ROLLED : 'current' (rev)
2232          *    SUCCESS        : 'summary' (str), 'current' (rev), 'target' (rev)
2233          *
2234          * @return self::SUCCESS on succes, self::* on failure
2235          */
2236         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails ) {
2237                 global $wgUser, $wgUseRCPatrol;
2238                 $resultDetails = null;
2239
2240                 if( $wgUser->isAllowed( 'rollback' ) ) {
2241                         if( $wgUser->isBlocked() ) {
2242                                 return self::BLOCKED;
2243                         }
2244                 } else {
2245                         return self::PERM_DENIED;
2246                 }
2247
2248                 if ( wfReadOnly() ) {
2249                         return self::READONLY;
2250                 }
2251                 if( !$wgUser->matchEditToken( $token, array( $this->mTitle->getPrefixedText(), $fromP ) ) )
2252                         return self::BAD_TOKEN;
2253
2254                 $dbw = wfGetDB( DB_MASTER );
2255
2256                 # Get the last editor
2257                 $current = Revision::newFromTitle( $this->mTitle );
2258                 if( is_null( $current ) ) {
2259                         # Something wrong... no page?
2260                         return self::BAD_TITLE;
2261                 }
2262
2263                 $from = str_replace( '_', ' ', $fromP );
2264                 if( $from != $current->getUserText() ) {
2265                         $resultDetails = array( 'current' => $current );
2266                         return self::ALREADY_ROLLED;
2267                 }
2268
2269                 # Get the last edit not by this guy
2270                 $user = intval( $current->getUser() );
2271                 $user_text = $dbw->addQuotes( $current->getUserText() );
2272                 $s = $dbw->selectRow( 'revision',
2273                         array( 'rev_id', 'rev_timestamp' ),
2274                         array(
2275                                 'rev_page' => $current->getPage(),
2276                                 "rev_user <> {$user} OR rev_user_text <> {$user_text}"
2277                         ), __METHOD__,
2278                         array(
2279                                 'USE INDEX' => 'page_timestamp',
2280                                 'ORDER BY'  => 'rev_timestamp DESC' )
2281                         );
2282                 if( $s === false ) {
2283                         # Something wrong
2284                         return self::ONLY_AUTHOR;
2285                 }
2286
2287                 $set = array();
2288                 if ( $bot ) {
2289                         # Mark all reverted edits as bot
2290                         $set['rc_bot'] = 1;
2291                 }
2292                 if ( $wgUseRCPatrol ) {
2293                         # Mark all reverted edits as patrolled
2294                         $set['rc_patrolled'] = 1;
2295                 }
2296
2297                 if ( $set ) {
2298                         $dbw->update( 'recentchanges', $set,
2299                                         array( /* WHERE */
2300                                                 'rc_cur_id' => $current->getPage(),
2301                                                 'rc_user_text' => $current->getUserText(),
2302                                                 "rc_timestamp > '{$s->rev_timestamp}'",
2303                                         ), __METHOD__
2304                                 );
2305                 }
2306
2307                 # Get the edit summary
2308                 $target = Revision::newFromId( $s->rev_id );
2309                 if( empty( $summary ) )
2310                         $summary = wfMsgForContent( 'revertpage', $target->getUserText(), $from );
2311
2312                 # Save
2313                 $flags = EDIT_UPDATE | EDIT_MINOR;
2314                 if( $bot )
2315                         $flags |= EDIT_FORCE_BOT;
2316                 $this->doEdit( $target->getText(), $summary, $flags );
2317
2318                 $resultDetails = array(
2319                         'summary' => $summary,
2320                         'current' => $current,
2321                         'target' => $target,
2322                 );
2323                 return self::SUCCESS;
2324         }
2325
2326         /**
2327          * User interface for rollback operations
2328          */
2329         function rollback() {
2330                 global $wgUser, $wgOut, $wgRequest, $wgUseRCPatrol;
2331
2332                 $details = null;
2333                 $result = $this->doRollback(
2334                         $wgRequest->getVal( 'from' ),
2335                         $wgRequest->getText( 'summary' ),
2336                         $wgRequest->getVal( 'token' ),
2337                         $wgRequest->getBool( 'bot' ),
2338                         $details
2339                 );
2340
2341                 switch( $result ) {
2342                         case self::BLOCKED:
2343                                 $wgOut->blockedPage();
2344                                 break;
2345                         case self::PERM_DENIED:
2346                                 $wgOut->permissionRequired( 'rollback' );
2347                                 break;
2348                         case self::READONLY:
2349                                 $wgOut->readOnlyPage( $this->getContent() );
2350                                 break;
2351                         case self::BAD_TOKEN:
2352                                 $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
2353                                 $wgOut->addWikiText( wfMsg( 'sessionfailure' ) );
2354                                 break;
2355                         case self::BAD_TITLE:
2356                                 $wgOut->addHtml( wfMsg( 'notanarticle' ) );
2357                                 break;
2358                         case self::ALREADY_ROLLED:
2359                                 $current = $details['current'];
2360                                 $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
2361                                 $wgOut->addWikiText(
2362                                         wfMsg( 'alreadyrolled',
2363                                                 htmlspecialchars( $this->mTitle->getPrefixedText() ),
2364                                                 htmlspecialchars( $wgRequest->getVal( 'from' ) ),
2365                                                 htmlspecialchars( $current->getUserText() )
2366                                         )
2367                                 );
2368                                 if( $current->getComment() != '' ) {
2369                                         $wgOut->addHtml( wfMsg( 'editcomment',
2370                                                 $wgUser->getSkin()->formatComment( $current->getComment() ) ) );
2371                                 }
2372                                 break;
2373                         case self::ONLY_AUTHOR:
2374                                 $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
2375                                 $wgOut->addHtml( wfMsg( 'cantrollback' ) );
2376                                 break;
2377                         case self::SUCCESS:
2378                                 $current = $details['current'];
2379                                 $target = $details['target'];
2380                                 $wgOut->setPageTitle( wfMsg( 'actioncomplete' ) );
2381                                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2382                                 $old = $wgUser->getSkin()->userLink( $current->getUser(), $current->getUserText() )
2383                                         . $wgUser->getSkin()->userToolLinks( $current->getUser(), $current->getUserText() );
2384                                 $new = $wgUser->getSkin()->userLink( $target->getUser(), $target->getUserText() )
2385                                         . $wgUser->getSkin()->userToolLinks( $target->getUser(), $target->getUserText() );
2386                                 $wgOut->addHtml( wfMsgExt( 'rollback-success', array( 'parse', 'replaceafter' ), $old, $new ) );
2387                                 $wgOut->returnToMain( false, $this->mTitle );
2388                                 break;
2389                         default:
2390                                 throw new MWException( __METHOD__ . ": Unknown return value `{$result}`" );
2391                 }
2392
2393         }
2394
2395
2396         /**
2397          * Do standard deferred updates after page view
2398          * @private
2399          */
2400         function viewUpdates() {
2401                 global $wgDeferredUpdateList;
2402
2403                 if ( 0 != $this->getID() ) {
2404                         global $wgDisableCounters;
2405                         if( !$wgDisableCounters ) {
2406                                 Article::incViewCount( $this->getID() );
2407                                 $u = new SiteStatsUpdate( 1, 0, 0 );
2408                                 array_push( $wgDeferredUpdateList, $u );
2409                         }
2410                 }
2411
2412                 # Update newtalk / watchlist notification status
2413                 global $wgUser;
2414                 $wgUser->clearNotification( $this->mTitle );
2415         }
2416
2417         /**
2418          * Do standard deferred updates after page edit.
2419          * Update links tables, site stats, search index and message cache.
2420          * Every 1000th edit, prune the recent changes table.
2421          *
2422          * @private
2423          * @param $text New text of the article
2424          * @param $summary Edit summary
2425          * @param $minoredit Minor edit
2426          * @param $timestamp_of_pagechange Timestamp associated with the page change
2427          * @param $newid rev_id value of the new revision
2428          * @param $changed Whether or not the content actually changed
2429          */
2430         function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange, $newid, $changed = true ) {
2431                 global $wgDeferredUpdateList, $wgMessageCache, $wgUser, $wgParser;
2432
2433                 wfProfileIn( __METHOD__ );
2434
2435                 # Parse the text
2436                 $options = new ParserOptions;
2437                 $options->setTidy(true);
2438                 $poutput = $wgParser->parse( $text, $this->mTitle, $options, true, true, $newid );
2439
2440                 # Save it to the parser cache
2441                 $parserCache =& ParserCache::singleton();
2442                 $parserCache->save( $poutput, $this, $wgUser );
2443
2444                 # Update the links tables
2445                 $u = new LinksUpdate( $this->mTitle, $poutput );
2446                 $u->doUpdate();
2447
2448                 if( wfRunHooks( 'ArticleEditUpdatesDeleteFromRecentchanges', array( &$this ) ) ) {
2449                         if ( 0 == mt_rand( 0, 99 ) ) {
2450                                 // Flush old entries from the `recentchanges` table; we do this on
2451                                 // random requests so as to avoid an increase in writes for no good reason
2452                                 global $wgRCMaxAge;
2453                                 $dbw = wfGetDB( DB_MASTER );
2454                                 $cutoff = $dbw->timestamp( time() - $wgRCMaxAge );
2455                                 $recentchanges = $dbw->tableName( 'recentchanges' );
2456                                 $sql = "DELETE FROM $recentchanges WHERE rc_timestamp < '{$cutoff}'";
2457                                 $dbw->query( $sql );
2458                         }
2459                 }
2460
2461                 $id = $this->getID();
2462                 $title = $this->mTitle->getPrefixedDBkey();
2463                 $shortTitle = $this->mTitle->getDBkey();
2464
2465                 if ( 0 == $id ) {
2466                         wfProfileOut( __METHOD__ );
2467                         return;
2468                 }
2469
2470                 $u = new SiteStatsUpdate( 0, 1, $this->mGoodAdjustment, $this->mTotalAdjustment );
2471                 array_push( $wgDeferredUpdateList, $u );
2472                 $u = new SearchUpdate( $id, $title, $text );
2473                 array_push( $wgDeferredUpdateList, $u );
2474
2475                 # If this is another user's talk page, update newtalk
2476                 # Don't do this if $changed = false otherwise some idiot can null-edit a
2477                 # load of user talk pages and piss people off, nor if it's a minor edit
2478                 # by a properly-flagged bot.
2479                 if( $this->mTitle->getNamespace() == NS_USER_TALK && $shortTitle != $wgUser->getTitleKey() && $changed
2480                         && !($minoredit && $wgUser->isAllowed('nominornewtalk') ) ) {
2481                         if (wfRunHooks('ArticleEditUpdateNewTalk', array(&$this)) ) {
2482                                 $other = User::newFromName( $shortTitle );
2483                                 if( is_null( $other ) && User::isIP( $shortTitle ) ) {
2484                                         // An anonymous user
2485                                         $other = new User();
2486                                         $other->setName( $shortTitle );
2487                                 }
2488                                 if( $other ) {
2489                                         $other->setNewtalk( true );
2490                                 }
2491                         }
2492                 }
2493
2494                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
2495                         $wgMessageCache->replace( $shortTitle, $text );
2496                 }
2497
2498                 wfProfileOut( __METHOD__ );
2499         }
2500
2501         /**
2502          * Perform article updates on a special page creation.
2503          *
2504          * @param Revision $rev
2505          *
2506          * @todo This is a shitty interface function. Kill it and replace the
2507          * other shitty functions like editUpdates and such so it's not needed
2508          * anymore.
2509          */
2510         function createUpdates( $rev ) {
2511                 $this->mGoodAdjustment = $this->isCountable( $rev->getText() );
2512                 $this->mTotalAdjustment = 1;
2513                 $this->editUpdates( $rev->getText(), $rev->getComment(),
2514                         $rev->isMinor(), wfTimestamp(), $rev->getId(), true );
2515         }
2516
2517         /**
2518          * Generate the navigation links when browsing through an article revisions
2519          * It shows the information as:
2520          *   Revision as of \<date\>; view current revision
2521          *   \<- Previous version | Next Version -\>
2522          *
2523          * @private
2524          * @param string $oldid         Revision ID of this article revision
2525          */
2526         function setOldSubtitle( $oldid=0 ) {
2527                 global $wgLang, $wgOut, $wgUser;
2528
2529                 if ( !wfRunHooks( 'DisplayOldSubtitle', array(&$this, &$oldid) ) ) {
2530                                 return;
2531                 }
2532
2533                 $revision = Revision::newFromId( $oldid );
2534
2535                 $current = ( $oldid == $this->mLatest );
2536                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
2537                 $sk = $wgUser->getSkin();
2538                 $lnk = $current
2539                         ? wfMsg( 'currentrevisionlink' )
2540                         : $lnk = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
2541                 $curdiff = $current
2542                         ? wfMsg( 'diff' )
2543                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'diff' ), 'diff=cur&oldid='.$oldid );
2544                 $prev = $this->mTitle->getPreviousRevisionID( $oldid ) ;
2545                 $prevlink = $prev
2546                         ? $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid )
2547                         : wfMsg( 'previousrevision' );
2548                 $prevdiff = $prev
2549                         ? $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'diff' ), 'diff=prev&oldid='.$oldid )
2550                         : wfMsg( 'diff' );
2551                 $nextlink = $current
2552                         ? wfMsg( 'nextrevision' )
2553                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
2554                 $nextdiff = $current
2555                         ? wfMsg( 'diff' )
2556                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'diff' ), 'diff=next&oldid='.$oldid );
2557
2558                 $userlinks = $sk->userLink( $revision->getUser(), $revision->getUserText() )
2559                                                 . $sk->userToolLinks( $revision->getUser(), $revision->getUserText() );
2560
2561                 $m = wfMsg( 'revision-info-current' );
2562                 $infomsg = $current && !wfEmptyMsg( 'revision-info-current', $m ) && $m != '-'
2563                         ? 'revision-info-current'
2564                         : 'revision-info';
2565
2566                 $r = "\n\t\t\t\t<div id=\"mw-{$infomsg}\">" . wfMsg( $infomsg, $td, $userlinks ) . "</div>\n" .
2567                      "\n\t\t\t\t<div id=\"mw-revision-nav\">" . wfMsg( 'revision-nav', $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff ) . "</div>\n\t\t\t";
2568                 $wgOut->setSubtitle( $r );
2569         }
2570
2571         /**
2572          * This function is called right before saving the wikitext,
2573          * so we can do things like signatures and links-in-context.
2574          *
2575          * @param string $text
2576          */
2577         function preSaveTransform( $text ) {
2578                 global $wgParser, $wgUser;
2579                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
2580         }
2581
2582         /* Caching functions */
2583
2584         /**
2585          * checkLastModified returns true if it has taken care of all
2586          * output to the client that is necessary for this request.
2587          * (that is, it has sent a cached version of the page)
2588          */
2589         function tryFileCache() {
2590                 static $called = false;
2591                 if( $called ) {
2592                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
2593                         return;
2594                 }
2595                 $called = true;
2596                 if($this->isFileCacheable()) {
2597                         $touched = $this->mTouched;
2598                         $cache = new HTMLFileCache( $this->mTitle );
2599                         if($cache->isFileCacheGood( $touched )) {
2600                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
2601                                 $cache->loadFromFileCache();
2602                                 return true;
2603                         } else {
2604                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
2605                                 ob_start( array(&$cache, 'saveToFileCache' ) );
2606                         }
2607                 } else {
2608                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
2609                 }
2610         }
2611
2612         /**
2613          * Check if the page can be cached
2614          * @return bool
2615          */
2616         function isFileCacheable() {
2617                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest, $wgLang, $wgContLang;
2618                 $action    = $wgRequest->getVal( 'action'    );
2619                 $oldid     = $wgRequest->getVal( 'oldid'     );
2620                 $diff      = $wgRequest->getVal( 'diff'      );
2621                 $redirect  = $wgRequest->getVal( 'redirect'  );
2622                 $printable = $wgRequest->getVal( 'printable' );
2623                 $page      = $wgRequest->getVal( 'page' );
2624
2625                 //check for non-standard user language; this covers uselang,
2626                 //and extensions for auto-detecting user language.
2627                 $ulang     = $wgLang->getCode();
2628                 $clang     = $wgContLang->getCode();
2629
2630                 $cacheable = $wgUseFileCache
2631                         && (!$wgShowIPinHeader)
2632                         && ($this->getID() != 0)
2633                         && ($wgUser->isAnon())
2634                         && (!$wgUser->getNewtalk())
2635                         && ($this->mTitle->getNamespace() != NS_SPECIAL )
2636                         && (empty( $action ) || $action == 'view')
2637                         && (!isset($oldid))
2638                         && (!isset($diff))
2639                         && (!isset($redirect))
2640                         && (!isset($printable))
2641                         && !isset($page)
2642                         && (!$this->mRedirectedFrom)
2643                         && ($ulang === $clang);
2644
2645                 if ( $cacheable ) {
2646                         //extension may have reason to disable file caching on some pages.
2647                         $cacheable = wfRunHooks( 'IsFileCacheable', array( $this ) );
2648                 }
2649
2650                 return $cacheable;
2651         }
2652
2653         /**
2654          * Loads page_touched and returns a value indicating if it should be used
2655          *
2656          */
2657         function checkTouched() {
2658                 if( !$this->mDataLoaded ) {
2659                         $this->loadPageData();
2660                 }
2661                 return !$this->mIsRedirect;
2662         }
2663
2664         /**
2665          * Get the page_touched field
2666          */
2667         function getTouched() {
2668                 # Ensure that page data has been loaded
2669                 if( !$this->mDataLoaded ) {
2670                         $this->loadPageData();
2671                 }
2672                 return $this->mTouched;
2673         }
2674
2675         /**
2676          * Get the page_latest field
2677          */
2678         function getLatest() {
2679                 if ( !$this->mDataLoaded ) {
2680                         $this->loadPageData();
2681                 }
2682                 return $this->mLatest;
2683         }
2684
2685         /**
2686          * Edit an article without doing all that other stuff
2687          * The article must already exist; link tables etc
2688          * are not updated, caches are not flushed.
2689          *
2690          * @param string $text text submitted
2691          * @param string $comment comment submitted
2692          * @param bool $minor whereas it's a minor modification
2693          */
2694         function quickEdit( $text, $comment = '', $minor = 0 ) {
2695                 wfProfileIn( __METHOD__ );
2696
2697                 $dbw = wfGetDB( DB_MASTER );
2698                 $dbw->begin();
2699                 $revision = new Revision( array(
2700                         'page'       => $this->getId(),
2701                         'text'       => $text,
2702                         'comment'    => $comment,
2703                         'minor_edit' => $minor ? 1 : 0,
2704                         ) );
2705                 $revision->insertOn( $dbw );
2706                 $this->updateRevisionOn( $dbw, $revision );
2707                 $dbw->commit();
2708
2709                 wfProfileOut( __METHOD__ );
2710         }
2711
2712         /**
2713          * Used to increment the view counter
2714          *
2715          * @static
2716          * @param integer $id article id
2717          */
2718         function incViewCount( $id ) {
2719                 $id = intval( $id );
2720                 global $wgHitcounterUpdateFreq, $wgDBtype;
2721
2722                 $dbw = wfGetDB( DB_MASTER );
2723                 $pageTable = $dbw->tableName( 'page' );
2724                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
2725                 $acchitsTable = $dbw->tableName( 'acchits' );
2726
2727                 if( $wgHitcounterUpdateFreq <= 1 ) {
2728                         $dbw->query( "UPDATE $pageTable SET page_counter = page_counter + 1 WHERE page_id = $id" );
2729                         return;
2730                 }
2731
2732                 # Not important enough to warrant an error page in case of failure
2733                 $oldignore = $dbw->ignoreErrors( true );
2734
2735                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2736
2737                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2738                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2739                         # Most of the time (or on SQL errors), skip row count check
2740                         $dbw->ignoreErrors( $oldignore );
2741                         return;
2742                 }
2743
2744                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2745                 $row = $dbw->fetchObject( $res );
2746                 $rown = intval( $row->n );
2747                 if( $rown >= $wgHitcounterUpdateFreq ){
2748                         wfProfileIn( 'Article::incViewCount-collect' );
2749                         $old_user_abort = ignore_user_abort( true );
2750
2751                         if ($wgDBtype == 'mysql')
2752                                 $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2753                         $tabletype = $wgDBtype == 'mysql' ? "ENGINE=HEAP " : '';
2754                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable $tabletype AS ".
2755                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2756                                 'GROUP BY hc_id');
2757                         $dbw->query("DELETE FROM $hitcounterTable");
2758                         if ($wgDBtype == 'mysql') {
2759                                 $dbw->query('UNLOCK TABLES');
2760                                 $dbw->query("UPDATE $pageTable,$acchitsTable SET page_counter=page_counter + hc_n ".
2761                                         'WHERE page_id = hc_id');
2762                         }
2763                         else {
2764                                 $dbw->query("UPDATE $pageTable SET page_counter=page_counter + hc_n ".
2765                                         "FROM $acchitsTable WHERE page_id = hc_id");
2766                         }
2767                         $dbw->query("DROP TABLE $acchitsTable");
2768
2769                         ignore_user_abort( $old_user_abort );
2770                         wfProfileOut( 'Article::incViewCount-collect' );
2771                 }
2772                 $dbw->ignoreErrors( $oldignore );
2773         }
2774
2775         /**#@+
2776          * The onArticle*() functions are supposed to be a kind of hooks
2777          * which should be called whenever any of the specified actions
2778          * are done.
2779          *
2780          * This is a good place to put code to clear caches, for instance.
2781          *
2782          * This is called on page move and undelete, as well as edit
2783          * @static
2784          * @param $title_obj a title object
2785          */
2786
2787         static function onArticleCreate($title) {
2788                 # The talk page isn't in the regular link tables, so we need to update manually:
2789                 if ( $title->isTalkPage() ) {
2790                         $other = $title->getSubjectPage();
2791                 } else {
2792                         $other = $title->getTalkPage();
2793                 }
2794                 $other->invalidateCache();
2795                 $other->purgeSquid();
2796
2797                 $title->touchLinks();
2798                 $title->purgeSquid();
2799         }
2800
2801         static function onArticleDelete( $title ) {
2802                 global $wgUseFileCache, $wgMessageCache;
2803
2804                 $title->touchLinks();
2805                 $title->purgeSquid();
2806
2807                 # File cache
2808                 if ( $wgUseFileCache ) {
2809                         $cm = new HTMLFileCache( $title );
2810                         @unlink( $cm->fileCacheName() );
2811                 }
2812
2813                 if( $title->getNamespace() == NS_MEDIAWIKI) {
2814                         $wgMessageCache->replace( $title->getDBkey(), false );
2815                 }
2816         }
2817
2818         /**
2819          * Purge caches on page update etc
2820          */
2821         static function onArticleEdit( $title ) {
2822                 global $wgDeferredUpdateList, $wgUseFileCache;
2823
2824                 // Invalidate caches of articles which include this page
2825                 $update = new HTMLCacheUpdate( $title, 'templatelinks' );
2826                 $wgDeferredUpdateList[] = $update;
2827
2828                 # Purge squid for this page only
2829                 $title->purgeSquid();
2830
2831                 # Clear file cache
2832                 if ( $wgUseFileCache ) {
2833                         $cm = new HTMLFileCache( $title );
2834                         @unlink( $cm->fileCacheName() );
2835                 }
2836         }
2837
2838         /**#@-*/
2839
2840         /**
2841          * Info about this page
2842          * Called for ?action=info when $wgAllowPageInfo is on.
2843          *
2844          * @public
2845          */
2846         function info() {
2847                 global $wgLang, $wgOut, $wgAllowPageInfo, $wgUser;
2848
2849                 if ( !$wgAllowPageInfo ) {
2850                         $wgOut->showErrorPage( 'nosuchaction', 'nosuchactiontext' );
2851                         return;
2852                 }
2853
2854                 $page = $this->mTitle->getSubjectPage();
2855
2856                 $wgOut->setPagetitle( $page->getPrefixedText() );
2857                 $wgOut->setPageTitleActionText( wfMsg( 'info_short' ) );
2858                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ) );
2859
2860                 if( !$this->mTitle->exists() ) {
2861                         $wgOut->addHtml( '<div class="noarticletext">' );
2862                         if( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
2863                                 // This doesn't quite make sense; the user is asking for
2864                                 // information about the _page_, not the message... -- RC
2865                                 $wgOut->addHtml( htmlspecialchars( wfMsgWeirdKey( $this->mTitle->getText() ) ) );
2866                         } else {
2867                                 $msg = $wgUser->isLoggedIn()
2868                                         ? 'noarticletext'
2869                                         : 'noarticletextanon';
2870                                 $wgOut->addHtml( wfMsgExt( $msg, 'parse' ) );
2871                         }
2872                         $wgOut->addHtml( '</div>' );
2873                 } else {
2874                         $dbr = wfGetDB( DB_SLAVE );
2875                         $wl_clause = array(
2876                                 'wl_title'     => $page->getDBkey(),
2877                                 'wl_namespace' => $page->getNamespace() );
2878                         $numwatchers = $dbr->selectField(
2879                                 'watchlist',
2880                                 'COUNT(*)',
2881                                 $wl_clause,
2882                                 __METHOD__,
2883                                 $this->getSelectOptions() );
2884
2885                         $pageInfo = $this->pageCountInfo( $page );
2886                         $talkInfo = $this->pageCountInfo( $page->getTalkPage() );
2887
2888                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $wgLang->formatNum( $numwatchers ) ) . '</li>' );
2889                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $wgLang->formatNum( $pageInfo['edits'] ) ) . '</li>');
2890                         if( $talkInfo ) {
2891                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $wgLang->formatNum( $talkInfo['edits'] ) ) . '</li>');
2892                         }
2893                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $wgLang->formatNum( $pageInfo['authors'] ) ) . '</li>' );
2894                         if( $talkInfo ) {
2895                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $wgLang->formatNum( $talkInfo['authors'] ) ) . '</li>' );
2896                         }
2897                         $wgOut->addHTML( '</ul>' );
2898
2899                 }
2900         }
2901
2902         /**
2903          * Return the total number of edits and number of unique editors
2904          * on a given page. If page does not exist, returns false.
2905          *
2906          * @param Title $title
2907          * @return array
2908          * @private
2909          */
2910         function pageCountInfo( $title ) {
2911                 $id = $title->getArticleId();
2912                 if( $id == 0 ) {
2913                         return false;
2914                 }
2915
2916                 $dbr = wfGetDB( DB_SLAVE );
2917
2918                 $rev_clause = array( 'rev_page' => $id );
2919
2920                 $edits = $dbr->selectField(
2921                         'revision',
2922                         'COUNT(rev_page)',
2923                         $rev_clause,
2924                         __METHOD__,
2925                         $this->getSelectOptions() );
2926
2927                 $authors = $dbr->selectField(
2928                         'revision',
2929                         'COUNT(DISTINCT rev_user_text)',
2930                         $rev_clause,
2931                         __METHOD__,
2932                         $this->getSelectOptions() );
2933
2934                 return array( 'edits' => $edits, 'authors' => $authors );
2935         }
2936
2937         /**
2938          * Return a list of templates used by this article.
2939          * Uses the templatelinks table
2940          *
2941          * @return array Array of Title objects
2942          */
2943         function getUsedTemplates() {
2944                 $result = array();
2945                 $id = $this->mTitle->getArticleID();
2946                 if( $id == 0 ) {
2947                         return array();
2948                 }
2949
2950                 $dbr = wfGetDB( DB_SLAVE );
2951                 $res = $dbr->select( array( 'templatelinks' ),
2952                         array( 'tl_namespace', 'tl_title' ),
2953                         array( 'tl_from' => $id ),
2954                         'Article:getUsedTemplates' );
2955                 if ( false !== $res ) {
2956                         if ( $dbr->numRows( $res ) ) {
2957                                 while ( $row = $dbr->fetchObject( $res ) ) {
2958                                         $result[] = Title::makeTitle( $row->tl_namespace, $row->tl_title );
2959                                 }
2960                         }
2961                 }
2962                 $dbr->freeResult( $res );
2963                 return $result;
2964         }
2965
2966         /**
2967          * Return an auto-generated summary if the text provided is a redirect.
2968          *
2969          * @param  string $text The wikitext to check
2970          * @return string '' or an appropriate summary
2971          */
2972         public static function getRedirectAutosummary( $text ) {
2973                 $rt = Title::newFromRedirect( $text );
2974                 if( is_object( $rt ) )
2975                         return wfMsgForContent( 'autoredircomment', $rt->getFullText() );
2976                 else
2977                         return '';
2978         }
2979
2980         /**
2981          * Return an auto-generated summary if the new text is much shorter than
2982          * the old text.
2983          *
2984          * @param  string $oldtext The previous text of the page
2985          * @param  string $text    The submitted text of the page
2986          * @return string An appropriate autosummary, or an empty string.
2987          */
2988         public static function getBlankingAutosummary( $oldtext, $text ) {
2989                 if ($oldtext!='' && $text=='') {
2990                         return wfMsgForContent('autosumm-blank');
2991                 } elseif (strlen($oldtext) > 10 * strlen($text) && strlen($text) < 500) {
2992                         #Removing more than 90% of the article
2993                         global $wgContLang;
2994                         $truncatedtext = $wgContLang->truncate($text, max(0, 200 - strlen(wfMsgForContent('autosumm-replace'))), '...');
2995                         return wfMsgForContent('autosumm-replace', $truncatedtext);
2996                 } else {
2997                         return '';
2998                 }
2999         }
3000
3001         /**
3002         * Return an applicable autosummary if one exists for the given edit.
3003         * @param string $oldtext The previous text of the page.
3004         * @param string $newtext The submitted text of the page.
3005         * @param bitmask $flags A bitmask of flags submitted for the edit.
3006         * @return string An appropriate autosummary, or an empty string.
3007         */
3008         public static function getAutosummary( $oldtext, $newtext, $flags ) {
3009
3010                 # This code is UGLY UGLY UGLY.
3011                 # Somebody PLEASE come up with a more elegant way to do it.
3012
3013                 #Redirect autosummaries
3014                 $summary = self::getRedirectAutosummary( $newtext );
3015
3016                 if ($summary)
3017                         return $summary;
3018
3019                 #Blanking autosummaries
3020                 if (!($flags & EDIT_NEW))
3021                         $summary = self::getBlankingAutosummary( $oldtext, $newtext );
3022
3023                 if ($summary)
3024                         return $summary;
3025
3026                 #New page autosummaries
3027                 if ($flags & EDIT_NEW && strlen($newtext)) {
3028                         #If they're making a new article, give its text, truncated, in the summary.
3029                         global $wgContLang;
3030                         $truncatedtext = $wgContLang->truncate(
3031                                 str_replace("\n", ' ', $newtext),
3032                                 max( 0, 200 - strlen( wfMsgForContent( 'autosumm-new') ) ),
3033                                 '...' );
3034                         $summary = wfMsgForContent( 'autosumm-new', $truncatedtext );
3035                 }
3036
3037                 if ($summary)
3038                         return $summary;
3039
3040                 return $summary;
3041         }
3042
3043         /**
3044          * Add the primary page-view wikitext to the output buffer
3045          * Saves the text into the parser cache if possible.
3046          * Updates templatelinks if it is out of date.
3047          *
3048          * @param string  $text
3049          * @param bool    $cache
3050          */
3051         public function outputWikiText( $text, $cache = true ) {
3052                 global $wgParser, $wgUser, $wgOut;
3053
3054                 $popts = $wgOut->parserOptions();
3055                 $popts->setTidy(true);
3056                 $parserOutput = $wgParser->parse( $text, $this->mTitle,
3057                         $popts, true, true, $this->getRevIdFetched() );
3058                 $popts->setTidy(false);
3059                 if ( $cache && $this && $parserOutput->getCacheTime() != -1 ) {
3060                         $parserCache =& ParserCache::singleton();
3061                         $parserCache->save( $parserOutput, $this, $wgUser );
3062                 }
3063
3064                 if ( !wfReadOnly() && $this->mTitle->areRestrictionsCascading() ) {
3065                         // templatelinks table may have become out of sync,
3066                         // especially if using variable-based transclusions.
3067                         // For paranoia, check if things have changed and if
3068                         // so apply updates to the database. This will ensure
3069                         // that cascaded protections apply as soon as the changes
3070                         // are visible.
3071
3072                         # Get templates from templatelinks
3073                         $id = $this->mTitle->getArticleID();
3074
3075                         $tlTemplates = array();
3076
3077                         $dbr = wfGetDB( DB_SLAVE );
3078                         $res = $dbr->select( array( 'templatelinks' ),
3079                                 array( 'tl_namespace', 'tl_title' ),
3080                                 array( 'tl_from' => $id ),
3081                                 'Article:getUsedTemplates' );
3082
3083                         global $wgContLang;
3084
3085                         if ( false !== $res ) {
3086                                 if ( $dbr->numRows( $res ) ) {
3087                                         while ( $row = $dbr->fetchObject( $res ) ) {
3088                                                 $tlTemplates[] = $wgContLang->getNsText( $row->tl_namespace ) . ':' . $row->tl_title ;
3089                                         }
3090                                 }
3091                         }
3092
3093                         # Get templates from parser output.
3094                         $poTemplates_allns = $parserOutput->getTemplates();
3095
3096                         $poTemplates = array ();
3097                         foreach ( $poTemplates_allns as $ns_templates ) {
3098                                 $poTemplates = array_merge( $poTemplates, $ns_templates );
3099                         }
3100
3101                         # Get the diff
3102                         $templates_diff = array_diff( $poTemplates, $tlTemplates );
3103
3104                         if ( count( $templates_diff ) > 0 ) {
3105                                 # Whee, link updates time.
3106                                 $u = new LinksUpdate( $this->mTitle, $parserOutput );
3107
3108                                 $dbw = wfGetDb( DB_MASTER );
3109                                 $dbw->begin();
3110
3111                                 $u->doUpdate();
3112
3113                                 $dbw->commit();
3114                         }
3115                 }
3116
3117                 $wgOut->addParserOutput( $parserOutput );
3118         }
3119
3120 }