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                         $this->addProtectionNotice( $editrestr );
 746                 }
 747
 748                 $outputDone = false;
 749                 wfRunHooks( 'ArticleViewHeader', array( &$this, &$outputDone, &$pcache ) );
 750                 if ( $pcache ) {
 751                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 752                                 // Ensure that UI elements requiring revision ID have
 753                                 // the correct version information.
 754                                 $wgOut->setRevisionId( $this->mLatest );
 755                                 $outputDone = true;
 756                         }
 757                 }
 758                 if ( !$outputDone ) {
 759                         $text = $this->getContent();
 760                         if ( $text === false ) {
 761                                 # Failed to load, replace text with error message
 762                                 $t = $this->mTitle->getPrefixedText();
 763                                 if( $oldid ) {
 764                                         $t .= ',oldid='.$oldid;
 765                                         $text = wfMsg( 'missingarticle', $t );
 766                                 } else {
 767                                         $text = wfMsg( 'noarticletext', $t );
 768                                 }
 769                         }
 770
 771                         # Another whitelist check in case oldid is altering the title
 772                         if ( !$this->mTitle->userCanRead() ) {
 773                                 $wgOut->loginToUse();
 774                                 $wgOut->output();
 775                                 exit;
 776                         }
 777
 778                         # We're looking at an old revision
 779
 780                         if ( !empty( $oldid ) ) {
 781                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 782                                 if( is_null( $this->mRevision ) ) {
 783                                         // FIXME: This would be a nice place to load the 'no such page' text.
 784                                 } else {
 785                                         $this->setOldSubtitle( isset($this->mOldId) ? $this->mOldId : $oldid );
 786                                         if( $this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
 787                                                 if( !$this->mRevision->userCan( Revision::DELETED_TEXT ) ) {
 788                                                         $wgOut->addWikiText( wfMsg( 'rev-deleted-text-permission' ) );
 789                                                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 790                                                         return;
 791                                                 } else {
 792                                                         $wgOut->addWikiText( wfMsg( 'rev-deleted-text-view' ) );
 793                                                         // and we are allowed to see...
 794                                                 }
 795                                         }
 796                                 }
 797
 798                         }
 799                 }
 800                 if( !$outputDone ) {
 801                         $wgOut->setRevisionId( $this->getRevIdFetched() );
 802
 803                          // Pages containing custom CSS or JavaScript get special treatment
 804                         if( $this->mTitle->isCssOrJsPage() || $this->mTitle->isCssJsSubpage() ) {
 805                                 $wgOut->addHtml( wfMsgExt( 'clearyourcache', 'parse' ) );
 806
 807                                 // Give hooks a chance to customise the output
 808                                 if( wfRunHooks( 'ShowRawCssJs', array( $this->mContent, $this->mTitle, $wgOut ) ) ) {
 809                                         // Wrap the whole lot in a <pre> and don't parse
 810                                         $m = array();
 811                                         preg_match( '!\.(css|js)$!u', $this->mTitle->getText(), $m );
 812                                         $wgOut->addHtml( "<pre class=\"mw-code mw-{$m[1]}\" dir=\"ltr\">\n" );
 813                                         $wgOut->addHtml( htmlspecialchars( $this->mContent ) );
 814                                         $wgOut->addHtml( "\n</pre>\n" );
 815                                 }
 816
 817                         }
 818
 819                         elseif ( $rt = Title::newFromRedirect( $text ) ) {
 820                                 # Display redirect
 821                                 $imageDir = $wgContLang->isRTL() ? 'rtl' : 'ltr';
 822                                 $imageUrl = $wgStylePath.'/common/images/redirect' . $imageDir . '.png';
 823                                 # Don't overwrite the subtitle if this was an old revision
 824                                 if( !$wasRedirected && $this->isCurrent() ) {
 825                                         $wgOut->setSubtitle( wfMsgHtml( 'redirectpagesub' ) );
 826                                 }
 827                                 $link = $sk->makeLinkObj( $rt, $rt->getFullText() );
 828
 829                                 $wgOut->addHTML( '<img src="'.$imageUrl.'" alt="#REDIRECT " />' .
 830                                   '<span class="redirectText">'.$link.'</span>' );
 831
 832                                 $parseout = $wgParser->parse($text, $this->mTitle, ParserOptions::newFromUser($wgUser));
 833                                 $wgOut->addParserOutputNoText( $parseout );
 834                         } else if ( $pcache ) {
 835                                 # Display content and save to parser cache
 836                                 $this->outputWikiText( $text );
 837                         } else {
 838                                 # Display content, don't attempt to save to parser cache
 839                                 # Don't show section-edit links on old revisions... this way lies madness.
 840                                 if( !$this->isCurrent() ) {
 841                                         $oldEditSectionSetting = $wgOut->parserOptions()->setEditSection( false );
 842                                 }
 843                                 # Display content and don't save to parser cache
 844                                 # With timing hack -- TS 2006-07-26
 845                                 $time = -wfTime();
 846                                 $this->outputWikiText( $text, false );
 847                                 $time += wfTime();
 848
 849                                 # Timing hack
 850                                 if ( $time > 3 ) {
 851                                         wfDebugLog( 'slow-parse', sprintf( "%-5.2f %s", $time,
 852                                                 $this->mTitle->getPrefixedDBkey()));
 853                                 }
 854
 855                                 if( !$this->isCurrent() ) {
 856                                         $wgOut->parserOptions()->setEditSection( $oldEditSectionSetting );
 857                                 }
 858
 859                         }
 860                 }
 861                 /* title may have been set from the cache */
 862                 $t = $wgOut->getPageTitle();
 863                 if( empty( $t ) ) {
 864                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 865                 }
 866
 867                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 868                 if( $ns == NS_USER_TALK &&
 869                         User::isIP( $this->mTitle->getText() ) ) {
 870                         $wgOut->addWikiText( wfMsg('anontalkpagetext') );
 871                 }
 872
 873                 # If we have been passed an &rcid= parameter, we want to give the user a
 874                 # chance to mark this new article as patrolled.
 875                 if ( $wgUseRCPatrol && !is_null( $rcid ) && $rcid != 0 && $wgUser->isAllowed( 'patrol' ) ) {
 876                         $wgOut->addHTML(
 877                                 "<div class='patrollink'>" .
 878                                         wfMsgHtml( 'markaspatrolledlink',
 879                                         $sk->makeKnownLinkObj( $this->mTitle, wfMsgHtml('markaspatrolledtext'),
 880                                                 "action=markpatrolled&rcid=$rcid" )
 881                                         ) .
 882                                 '</div>'
 883                          );
 884                 }
 885
 886                 # Trackbacks
 887                 if ($wgUseTrackbacks)
 888                         $this->addTrackbacks();
 889
 890                 $this->viewUpdates();
 891                 wfProfileOut( __METHOD__ );
 892         }
 893
 894         /*
 895         * Output a notice that a page is protected. Only give details for edit
 896         * restrictions. Cares only about the first permission in the arrays, which is
 897         * part of a larger shitty inconsistency about requiring several permissions...
 898         * @param Array $editrestr, edit restrictions
 899         */
 900         function addProtectionNotice( $editrestr ) {
 901                 global $wgOut;
 902
 903                 if( empty($editrestr) )
 904                         return;
 905
 906                 $permission = $editrestr[0];
 907                 $permission = ($permission=='sysop') ? 'protect' : $permission;
 908
 909                 $editGroups = '';
 910                 # Get groups that have each right
 911                 if( $permission ) {
 912                         $editGroups = $wgOut->getGroupsWithPermission( $permission );
 913                         $editGroups = implode( ', ', $editGroups );
 914                 }
 915                 # Use general messages if no groups found for a type
 916                 if( !$editGroups ) {
 917                         $msg = wfMsgExt( 'protected-subtitle', array('parsemag'), $editrestr );
 918                 } else {
 919                         $msg = wfMsgExt( 'protected-subtitle-edit', array('parsemag'), $editGroups, $editrestr );
 920                 }
 921                 if( $wgOut->getSubtitle() )
 922                         $msg = " $msg";
 923
 924                 $wgOut->setSubtitle( $wgOut->getSubtitle() . $msg );
 925         }
 926
 927         function addTrackbacks() {
 928                 global $wgOut, $wgUser;
 929
 930                 $dbr = wfGetDB(DB_SLAVE);
 931                 $tbs = $dbr->select(
 932                                 /* FROM   */ 'trackbacks',
 933                                 /* SELECT */ array('tb_id', 'tb_title', 'tb_url', 'tb_ex', 'tb_name'),
 934                                 /* WHERE  */ array('tb_page' => $this->getID())
 935                 );
 936
 937                 if (!$dbr->numrows($tbs))
 938                         return;
 939
 940                 $tbtext = "";
 941                 while ($o = $dbr->fetchObject($tbs)) {
 942                         $rmvtxt = "";
 943                         if ($wgUser->isAllowed( 'trackback' )) {
 944                                 $delurl = $this->mTitle->getFullURL("action=deletetrackback&tbid="
 945                                                 . $o->tb_id . "&token=" . urlencode( $wgUser->editToken() ) );
 946                                 $rmvtxt = wfMsg( 'trackbackremove', htmlspecialchars( $delurl ) );
 947                         }
 948                         $tbtext .= wfMsg(strlen($o->tb_ex) ? 'trackbackexcerpt' : 'trackback',
 949                                         $o->tb_title,
 950                                         $o->tb_url,
 951                                         $o->tb_ex,
 952                                         $o->tb_name,
 953                                         $rmvtxt);
 954                 }
 955                 $wgOut->addWikitext(wfMsg('trackbackbox', $tbtext));
 956         }
 957
 958         function deletetrackback() {
 959                 global $wgUser, $wgRequest, $wgOut, $wgTitle;
 960
 961                 if (!$wgUser->matchEditToken($wgRequest->getVal('token'))) {
 962                         $wgOut->addWikitext(wfMsg('sessionfailure'));
 963                         return;
 964                 }
 965
 966                 if ((!$wgUser->isAllowed('delete'))) {
 967                         $wgOut->permissionRequired( 'delete' );
 968                         return;
 969                 }
 970
 971                 if (wfReadOnly()) {
 972                         $wgOut->readOnlyPage();
 973                         return;
 974                 }
 975
 976                 $db = wfGetDB(DB_MASTER);
 977                 $db->delete('trackbacks', array('tb_id' => $wgRequest->getInt('tbid')));
 978                 $wgTitle->invalidateCache();
 979                 $wgOut->addWikiText(wfMsg('trackbackdeleteok'));
 980         }
 981
 982         function render() {
 983                 global $wgOut;
 984
 985                 $wgOut->setArticleBodyOnly(true);
 986                 $this->view();
 987         }
 988
 989         /**
 990          * Handle action=purge
 991          */
 992         function purge() {
 993                 global $wgUser, $wgRequest, $wgOut;
 994
 995                 if ( $wgUser->isAllowed( 'purge' ) || $wgRequest->wasPosted() ) {
 996                         if( wfRunHooks( 'ArticlePurge', array( &$this ) ) ) {
 997                                 $this->doPurge();
 998                         }
 999                 } else {
1000                         $msg = $wgOut->parse( wfMsg( 'confirm_purge' ) );
1001                         $action = $this->mTitle->escapeLocalURL( 'action=purge' );
1002                         $button = htmlspecialchars( wfMsg( 'confirm_purge_button' ) );
1003                         $msg = str_replace( '$1',
1004                                 "<form method=\"post\" action=\"$action\">\n" .
1005                                 "<input type=\"submit\" name=\"submit\" value=\"$button\" />\n" .
1006                                 "</form>\n", $msg );
1007
1008                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
1009                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
1010                         $wgOut->addHTML( $msg );
1011                 }
1012         }
1013
1014         /**
1015          * Perform the actions of a page purging
1016          */
1017         function doPurge() {
1018                 global $wgUseSquid;
1019                 // Invalidate the cache
1020                 $this->mTitle->invalidateCache();
1021
1022                 if ( $wgUseSquid ) {
1023                         // Commit the transaction before the purge is sent
1024                         $dbw = wfGetDB( DB_MASTER );
1025                         $dbw->immediateCommit();
1026
1027                         // Send purge
1028                         $update = SquidUpdate::newSimplePurge( $this->mTitle );
1029                         $update->doUpdate();
1030                 }
1031                 $this->view();
1032         }
1033
1034         /**
1035          * Insert a new empty page record for this article.
1036          * This *must* be followed up by creating a revision
1037          * and running $this->updateToLatest( $rev_id );
1038          * or else the record will be left in a funky state.
1039          * Best if all done inside a transaction.
1040          *
1041          * @param Database $dbw
1042          * @return int     The newly created page_id key
1043          * @private
1044          */
1045         function insertOn( $dbw ) {
1046                 wfProfileIn( __METHOD__ );
1047
1048                 $page_id = $dbw->nextSequenceValue( 'page_page_id_seq' );
1049                 $dbw->insert( 'page', array(
1050                         'page_id'           => $page_id,
1051                         'page_namespace'    => $this->mTitle->getNamespace(),
1052                         'page_title'        => $this->mTitle->getDBkey(),
1053                         'page_counter'      => 0,
1054                         'page_restrictions' => '',
1055                         'page_is_redirect'  => 0, # Will set this shortly...
1056                         'page_is_new'       => 1,
1057                         'page_random'       => wfRandom(),
1058                         'page_touched'      => $dbw->timestamp(),
1059                         'page_latest'       => 0, # Fill this in shortly...
1060                         'page_len'          => 0, # Fill this in shortly...
1061                 ), __METHOD__ );
1062                 $newid = $dbw->insertId();
1063
1064                 $this->mTitle->resetArticleId( $newid );
1065
1066                 wfProfileOut( __METHOD__ );
1067                 return $newid;
1068         }
1069
1070         /**
1071          * Update the page record to point to a newly saved revision.
1072          *
1073          * @param Database $dbw
1074          * @param Revision $revision For ID number, and text used to set
1075                                      length and redirect status fields
1076          * @param int $lastRevision If given, will not overwrite the page field
1077          *                          when different from the currently set value.
1078          *                          Giving 0 indicates the new page flag should
1079          *                          be set on.
1080          * @param bool $lastRevIsRedirect If given, will optimize adding and
1081          *                                                      removing rows in redirect table.
1082          * @return bool true on success, false on failure
1083          * @private
1084          */
1085         function updateRevisionOn( &$dbw, $revision, $lastRevision = null, $lastRevIsRedirect = null ) {
1086                 wfProfileIn( __METHOD__ );
1087
1088                 $text = $revision->getText();
1089                 $rt = Title::newFromRedirect( $text );
1090
1091                 $conditions = array( 'page_id' => $this->getId() );
1092                 if( !is_null( $lastRevision ) ) {
1093                         # An extra check against threads stepping on each other
1094                         $conditions['page_latest'] = $lastRevision;
1095                 }
1096
1097                 $dbw->update( 'page',
1098                         array( /* SET */
1099                                 'page_latest'      => $revision->getId(),
1100                                 'page_touched'     => $dbw->timestamp(),
1101                                 'page_is_new'      => ($lastRevision === 0) ? 1 : 0,
1102                                 'page_is_redirect' => $rt !== NULL ? 1 : 0,
1103                                 'page_len'         => strlen( $text ),
1104                         ),
1105                         $conditions,
1106                         __METHOD__ );
1107
1108                 $result = $dbw->affectedRows() != 0;
1109
1110                 if ($result) {
1111                         // FIXME: Should the result from updateRedirectOn() be returned instead?
1112                         $this->updateRedirectOn( $dbw, $rt, $lastRevIsRedirect );
1113                 }
1114
1115                 wfProfileOut( __METHOD__ );
1116                 return $result;
1117         }
1118
1119         /**
1120          * Add row to the redirect table if this is a redirect, remove otherwise.
1121          *
1122          * @param Database $dbw
1123          * @param $redirectTitle a title object pointing to the redirect target,
1124          *                                                      or NULL if this is not a redirect
1125          * @param bool $lastRevIsRedirect If given, will optimize adding and
1126          *                                                      removing rows in redirect table.
1127          * @return bool true on success, false on failure
1128          * @private
1129          */
1130         function updateRedirectOn( &$dbw, $redirectTitle, $lastRevIsRedirect = null ) {
1131
1132                 // Always update redirects (target link might have changed)
1133                 // Update/Insert if we don't know if the last revision was a redirect or not
1134                 // Delete if changing from redirect to non-redirect
1135                 $isRedirect = !is_null($redirectTitle);
1136                 if ($isRedirect || is_null($lastRevIsRedirect) || $lastRevIsRedirect !== $isRedirect) {
1137
1138                         wfProfileIn( __METHOD__ );
1139
1140                         if ($isRedirect) {
1141
1142                                 // This title is a redirect, Add/Update row in the redirect table
1143                                 $set = array( /* SET */
1144                                         'rd_namespace' => $redirectTitle->getNamespace(),
1145                                         'rd_title'     => $redirectTitle->getDBkey(),
1146                                         'rd_from'      => $this->getId(),
1147                                 );
1148
1149                                 $dbw->replace( 'redirect', array( 'rd_from' ), $set, __METHOD__ );
1150                         } else {
1151                                 // This is not a redirect, remove row from redirect table
1152                                 $where = array( 'rd_from' => $this->getId() );
1153                                 $dbw->delete( 'redirect', $where, __METHOD__);
1154                         }
1155
1156                         wfProfileOut( __METHOD__ );
1157                         return ( $dbw->affectedRows() != 0 );
1158                 }
1159
1160                 return true;
1161         }
1162
1163         /**
1164          * If the given revision is newer than the currently set page_latest,
1165          * update the page record. Otherwise, do nothing.
1166          *
1167          * @param Database $dbw
1168          * @param Revision $revision
1169          */
1170         function updateIfNewerOn( &$dbw, $revision ) {
1171                 wfProfileIn( __METHOD__ );
1172
1173                 $row = $dbw->selectRow(
1174                         array( 'revision', 'page' ),
1175                         array( 'rev_id', 'rev_timestamp', 'page_is_redirect' ),
1176                         array(
1177                                 'page_id' => $this->getId(),
1178                                 'page_latest=rev_id' ),
1179                         __METHOD__ );
1180                 if( $row ) {
1181                         if( wfTimestamp(TS_MW, $row->rev_timestamp) >= $revision->getTimestamp() ) {
1182                                 wfProfileOut( __METHOD__ );
1183                                 return false;
1184                         }
1185                         $prev = $row->rev_id;
1186                         $lastRevIsRedirect = (bool)$row->page_is_redirect;
1187                 } else {
1188                         # No or missing previous revision; mark the page as new
1189                         $prev = 0;
1190                         $lastRevIsRedirect = null;
1191                 }
1192
1193                 $ret = $this->updateRevisionOn( $dbw, $revision, $prev, $lastRevIsRedirect );
1194                 wfProfileOut( __METHOD__ );
1195                 return $ret;
1196         }
1197
1198         /**
1199          * @return string Complete article text, or null if error
1200          */
1201         function replaceSection($section, $text, $summary = '', $edittime = NULL) {
1202                 wfProfileIn( __METHOD__ );
1203
1204                 if( $section == '' ) {
1205                         // Whole-page edit; let the text through unmolested.
1206                 } else {
1207                         if( is_null( $edittime ) ) {
1208                                 $rev = Revision::newFromTitle( $this->mTitle );
1209                         } else {
1210                                 $dbw = wfGetDB( DB_MASTER );
1211                                 $rev = Revision::loadFromTimestamp( $dbw, $this->mTitle, $edittime );
1212                         }
1213                         if( is_null( $rev ) ) {
1214                                 wfDebug( "Article::replaceSection asked for bogus section (page: " .
1215                                         $this->getId() . "; section: $section; edittime: $edittime)\n" );
1216                                 return null;
1217                         }
1218                         $oldtext = $rev->getText();
1219
1220                         if( $section == 'new' ) {
1221                                 # Inserting a new section
1222                                 $subject = $summary ? "== {$summary} ==\n\n" : '';
1223                                 $text = strlen( trim( $oldtext ) ) > 0
1224                                                 ? "{$oldtext}\n\n{$subject}{$text}"
1225                                                 : "{$subject}{$text}";
1226                         } else {
1227                                 # Replacing an existing section; roll out the big guns
1228                                 global $wgParser;
1229                                 $text = $wgParser->replaceSection( $oldtext, $section, $text );
1230                         }
1231
1232                 }
1233
1234                 wfProfileOut( __METHOD__ );
1235                 return $text;
1236         }
1237
1238         /**
1239          * @deprecated use Article::doEdit()
1240          */
1241         function insertNewArticle( $text, $summary, $isminor, $watchthis, $suppressRC=false, $comment=false ) {
1242                 $flags = EDIT_NEW | EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1243                         ( $isminor ? EDIT_MINOR : 0 ) |
1244                         ( $suppressRC ? EDIT_SUPPRESS_RC : 0 );
1245
1246                 # If this is a comment, add the summary as headline
1247                 if ( $comment && $summary != "" ) {
1248                         $text = "== {$summary} ==\n\n".$text;
1249                 }
1250
1251                 $this->doEdit( $text, $summary, $flags );
1252
1253                 $dbw = wfGetDB( DB_MASTER );
1254                 if ($watchthis) {
1255                         if (!$this->mTitle->userIsWatching()) {
1256                                 $dbw->begin();
1257                                 $this->doWatch();
1258                                 $dbw->commit();
1259                         }
1260                 } else {
1261                         if ( $this->mTitle->userIsWatching() ) {
1262                                 $dbw->begin();
1263                                 $this->doUnwatch();
1264                                 $dbw->commit();
1265                         }
1266                 }
1267                 $this->doRedirect( $this->isRedirect( $text ) );
1268         }
1269
1270         /**
1271          * @deprecated use Article::doEdit()
1272          */
1273         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
1274                 $flags = EDIT_UPDATE | EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1275                         ( $minor ? EDIT_MINOR : 0 ) |
1276                         ( $forceBot ? EDIT_FORCE_BOT : 0 );
1277
1278                 $good = $this->doEdit( $text, $summary, $flags );
1279                 if ( $good ) {
1280                         $dbw = wfGetDB( DB_MASTER );
1281                         if ($watchthis) {
1282                                 if (!$this->mTitle->userIsWatching()) {
1283                                         $dbw->begin();
1284                                         $this->doWatch();
1285                                         $dbw->commit();
1286                                 }
1287                         } else {
1288                                 if ( $this->mTitle->userIsWatching() ) {
1289                                         $dbw->begin();
1290                                         $this->doUnwatch();
1291                                         $dbw->commit();
1292                                 }
1293                         }
1294
1295                         $extraq = ''; // Give extensions a chance to modify URL query on update
1296                         wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this, &$sectionanchor, &$extraq ) );
1297
1298                         $this->doRedirect( $this->isRedirect( $text ), $sectionanchor, $extraq );
1299                 }
1300                 return $good;
1301         }
1302
1303         /**
1304          * Article::doEdit()
1305          *
1306          * Change an existing article or create a new article. Updates RC and all necessary caches,
1307          * optionally via the deferred update array.
1308          *
1309          * $wgUser must be set before calling this function.
1310          *
1311          * @param string $text New text
1312          * @param string $summary Edit summary
1313          * @param integer $flags bitfield:
1314          *      EDIT_NEW
1315          *          Article is known or assumed to be non-existent, create a new one
1316          *      EDIT_UPDATE
1317          *          Article is known or assumed to be pre-existing, update it
1318          *      EDIT_MINOR
1319          *          Mark this edit minor, if the user is allowed to do so
1320          *      EDIT_SUPPRESS_RC
1321          *          Do not log the change in recentchanges
1322          *      EDIT_FORCE_BOT
1323          *          Mark the edit a "bot" edit regardless of user rights
1324          *      EDIT_DEFER_UPDATES
1325          *          Defer some of the updates until the end of index.php
1326          *      EDIT_AUTOSUMMARY
1327          *          Fill in blank summaries with generated text where possible
1328          *
1329          * If neither EDIT_NEW nor EDIT_UPDATE is specified, the status of the article will be detected.
1330          * If EDIT_UPDATE is specified and the article doesn't exist, the function will return false. If
1331          * EDIT_NEW is specified and the article does exist, a duplicate key error will cause an exception
1332          * to be thrown from the Database. These two conditions are also possible with auto-detection due
1333          * to MediaWiki's performance-optimised locking strategy.
1334          *
1335          * @return bool success
1336          */
1337         function doEdit( $text, $summary, $flags = 0 ) {
1338                 global $wgUser, $wgDBtransactions;
1339
1340                 wfProfileIn( __METHOD__ );
1341                 $good = true;
1342
1343                 if ( !($flags & EDIT_NEW) && !($flags & EDIT_UPDATE) ) {
1344                         $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
1345                         if ( $aid ) {
1346                                 $flags |= EDIT_UPDATE;
1347                         } else {
1348                                 $flags |= EDIT_NEW;
1349                         }
1350                 }
1351
1352                 if( !wfRunHooks( 'ArticleSave', array( &$this, &$wgUser, &$text,
1353                         &$summary, $flags & EDIT_MINOR,
1354                         null, null, &$flags ) ) )
1355                 {
1356                         wfDebug( __METHOD__ . ": ArticleSave hook aborted save!\n" );
1357                         wfProfileOut( __METHOD__ );
1358                         return false;
1359                 }
1360
1361                 # Silently ignore EDIT_MINOR if not allowed
1362                 $isminor = ( $flags & EDIT_MINOR ) && $wgUser->isAllowed('minoredit');
1363                 $bot = $wgUser->isAllowed( 'bot' ) || ( $flags & EDIT_FORCE_BOT );
1364
1365                 $oldtext = $this->getContent();
1366                 $oldsize = strlen( $oldtext );
1367
1368                 # Provide autosummaries if one is not provided.
1369                 if ($flags & EDIT_AUTOSUMMARY && $summary == '')
1370                         $summary = $this->getAutosummary( $oldtext, $text, $flags );
1371
1372                 $text = $this->preSaveTransform( $text );
1373                 $newsize = strlen( $text );
1374
1375                 $dbw = wfGetDB( DB_MASTER );
1376                 $now = wfTimestampNow();
1377
1378                 if ( $flags & EDIT_UPDATE ) {
1379                         # Update article, but only if changed.
1380
1381                         # Make sure the revision is either completely inserted or not inserted at all
1382                         if( !$wgDBtransactions ) {
1383                                 $userAbort = ignore_user_abort( true );
1384                         }
1385
1386                         $lastRevision = 0;
1387                         $revisionId = 0;
1388
1389                         if ( 0 != strcmp( $text, $oldtext ) ) {
1390                                 $this->mGoodAdjustment = (int)$this->isCountable( $text )
1391                                   - (int)$this->isCountable( $oldtext );
1392                                 $this->mTotalAdjustment = 0;
1393
1394                                 $lastRevision = $dbw->selectField(
1395                                         'page', 'page_latest', array( 'page_id' => $this->getId() ) );
1396
1397                                 if ( !$lastRevision ) {
1398                                         # Article gone missing
1399                                         wfDebug( __METHOD__.": EDIT_UPDATE specified but article doesn't exist\n" );
1400                                         wfProfileOut( __METHOD__ );
1401                                         return false;
1402                                 }
1403
1404                                 $revision = new Revision( array(
1405                                         'page'       => $this->getId(),
1406                                         'comment'    => $summary,
1407                                         'minor_edit' => $isminor,
1408                                         'text'       => $text
1409                                         ) );
1410
1411                                 $dbw->begin();
1412                                 $revisionId = $revision->insertOn( $dbw );
1413
1414                                 # Update page
1415                                 $ok = $this->updateRevisionOn( $dbw, $revision, $lastRevision );
1416
1417                                 if( !$ok ) {
1418                                         /* Belated edit conflict! Run away!! */
1419                                         $good = false;
1420                                         $dbw->rollback();
1421                                 } else {
1422                                         # Update recentchanges
1423                                         if( !( $flags & EDIT_SUPPRESS_RC ) ) {
1424                                                 $rcid = RecentChange::notifyEdit( $now, $this->mTitle, $isminor, $wgUser, $summary,
1425                                                         $lastRevision, $this->getTimestamp(), $bot, '', $oldsize, $newsize,
1426                                                         $revisionId );
1427
1428                                                 # Mark as patrolled if the user can do so
1429                                                 if( $GLOBALS['wgUseRCPatrol'] && $wgUser->isAllowed( 'autopatrol' ) ) {
1430                                                         RecentChange::markPatrolled( $rcid );
1431                                                         PatrolLog::record( $rcid, true );
1432                                                 }
1433                                         }
1434                                         $wgUser->incEditCount();
1435                                         $dbw->commit();
1436                                 }
1437                         } else {
1438                                 $revision = null;
1439                                 // Keep the same revision ID, but do some updates on it
1440                                 $revisionId = $this->getRevIdFetched();
1441                                 // Update page_touched, this is usually implicit in the page update
1442                                 // Other cache updates are done in onArticleEdit()
1443                                 $this->mTitle->invalidateCache();
1444                         }
1445
1446                         if( !$wgDBtransactions ) {
1447                                 ignore_user_abort( $userAbort );
1448                         }
1449
1450                         if ( $good ) {
1451                                 # Invalidate cache of this article and all pages using this article
1452                                 # as a template. Partly deferred.
1453                                 Article::onArticleEdit( $this->mTitle );
1454
1455                                 # Update links tables, site stats, etc.
1456                                 $changed = ( strcmp( $oldtext, $text ) != 0 );
1457                                 $this->editUpdates( $text, $summary, $isminor, $now, $revisionId, $changed );
1458                         }
1459                 } else {
1460                         # Create new article
1461
1462                         # Set statistics members
1463                         # We work out if it's countable after PST to avoid counter drift
1464                         # when articles are created with {{subst:}}
1465                         $this->mGoodAdjustment = (int)$this->isCountable( $text );
1466                         $this->mTotalAdjustment = 1;
1467
1468                         $dbw->begin();
1469
1470                         # Add the page record; stake our claim on this title!
1471                         # This will fail with a database query exception if the article already exists
1472                         $newid = $this->insertOn( $dbw );
1473
1474                         # Save the revision text...
1475                         $revision = new Revision( array(
1476                                 'page'       => $newid,
1477                                 'comment'    => $summary,
1478                                 'minor_edit' => $isminor,
1479                                 'text'       => $text
1480                                 ) );
1481                         $revisionId = $revision->insertOn( $dbw );
1482
1483                         $this->mTitle->resetArticleID( $newid );
1484
1485                         # Update the page record with revision data
1486                         $this->updateRevisionOn( $dbw, $revision, 0 );
1487
1488                         if( !( $flags & EDIT_SUPPRESS_RC ) ) {
1489                                 $rcid = RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary, $bot,
1490                                   '', strlen( $text ), $revisionId );
1491                                 # Mark as patrolled if the user can
1492                                 if( $GLOBALS['wgUseRCPatrol'] && $wgUser->isAllowed( 'autopatrol' ) ) {
1493                                         RecentChange::markPatrolled( $rcid );
1494                                         PatrolLog::record( $rcid, true );
1495                                 }
1496                         }
1497                         $wgUser->incEditCount();
1498                         $dbw->commit();
1499
1500                         # Update links, etc.
1501                         $this->editUpdates( $text, $summary, $isminor, $now, $revisionId, true );
1502
1503                         # Clear caches
1504                         Article::onArticleCreate( $this->mTitle );
1505
1506                         wfRunHooks( 'ArticleInsertComplete', array( &$this, &$wgUser, $text, $summary,
1507                          $flags & EDIT_MINOR, null, null, &$flags, $revision ) );
1508                 }
1509
1510                 if ( $good && !( $flags & EDIT_DEFER_UPDATES ) ) {
1511                         wfDoUpdates();
1512                 }
1513
1514                 wfRunHooks( 'ArticleSaveComplete', array( &$this, &$wgUser, $text, $summary,
1515                         $flags & EDIT_MINOR, null, null, &$flags, $revision ) );
1516
1517                 wfProfileOut( __METHOD__ );
1518                 return $good;
1519         }
1520
1521         /**
1522          * @deprecated wrapper for doRedirect
1523          */
1524         function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid ) {
1525                 $this->doRedirect( $this->isRedirect( $text ), $sectionanchor );
1526         }
1527
1528         /**
1529          * Output a redirect back to the article.
1530          * This is typically used after an edit.
1531          *
1532          * @param boolean $noRedir Add redirect=no
1533          * @param string $sectionAnchor section to redirect to, including "#"
1534          */
1535         function doRedirect( $noRedir = false, $sectionAnchor = '', $extraq = '' ) {
1536                 global $wgOut;
1537                 if ( $noRedir ) {
1538                         $query = 'redirect=no';
1539                         if( $extraq )
1540                                 $query .= "&$query";
1541                 } else {
1542                         $query = $extraq;
1543                 }
1544                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $sectionAnchor );
1545         }
1546
1547         /**
1548          * Mark this particular edit as patrolled
1549          */
1550         function markpatrolled() {
1551                 global $wgOut, $wgRequest, $wgUseRCPatrol, $wgUser;
1552                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1553
1554                 # Check RC patrol config. option
1555                 if( !$wgUseRCPatrol ) {
1556                         $wgOut->errorPage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1557                         return;
1558                 }
1559
1560                 # Check permissions
1561                 if( !$wgUser->isAllowed( 'patrol' ) ) {
1562                         $wgOut->permissionRequired( 'patrol' );
1563                         return;
1564                 }
1565
1566                 # If we haven't been given an rc_id value, we can't do anything
1567                 $rcid = $wgRequest->getVal( 'rcid' );
1568                 if( !$rcid ) {
1569                         $wgOut->errorPage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1570                         return;
1571                 }
1572
1573                 # Handle the 'MarkPatrolled' hook
1574                 if( !wfRunHooks( 'MarkPatrolled', array( $rcid, &$wgUser, false ) ) ) {
1575                         return;
1576                 }
1577
1578                 $return = SpecialPage::getTitleFor( 'Recentchanges' );
1579                 # If it's left up to us, check that the user is allowed to patrol this edit
1580                 # If the user has the "autopatrol" right, then we'll assume there are no
1581                 # other conditions stopping them doing so
1582                 if( !$wgUser->isAllowed( 'autopatrol' ) ) {
1583                         $rc = RecentChange::newFromId( $rcid );
1584                         # Graceful error handling, as we've done before here...
1585                         # (If the recent change doesn't exist, then it doesn't matter whether
1586                         # the user is allowed to patrol it or not; nothing is going to happen
1587                         if( is_object( $rc ) && $wgUser->getName() == $rc->getAttribute( 'rc_user_text' ) ) {
1588                                 # The user made this edit, and can't patrol it
1589                                 # Tell them so, and then back off
1590                                 $wgOut->setPageTitle( wfMsg( 'markedaspatrollederror' ) );
1591                                 $wgOut->addWikiText( wfMsgNoTrans( 'markedaspatrollederror-noautopatrol' ) );
1592                                 $wgOut->returnToMain( false, $return );
1593                                 return;
1594                         }
1595                 }
1596
1597                 # Mark the edit as patrolled
1598                 RecentChange::markPatrolled( $rcid );
1599                 PatrolLog::record( $rcid );
1600                 wfRunHooks( 'MarkPatrolledComplete', array( &$rcid, &$wgUser, false ) );
1601
1602                 # Inform the user
1603                 $wgOut->setPageTitle( wfMsg( 'markedaspatrolled' ) );
1604                 $wgOut->addWikiText( wfMsgNoTrans( 'markedaspatrolledtext' ) );
1605                 $wgOut->returnToMain( false, $return );
1606         }
1607
1608         /**
1609          * User-interface handler for the "watch" action
1610          */
1611
1612         function watch() {
1613
1614                 global $wgUser, $wgOut;
1615
1616                 if ( $wgUser->isAnon() ) {
1617                         $wgOut->showErrorPage( 'watchnologin', 'watchnologintext' );
1618                         return;
1619                 }
1620                 if ( wfReadOnly() ) {
1621                         $wgOut->readOnlyPage();
1622                         return;
1623                 }
1624
1625                 if( $this->doWatch() ) {
1626                         $wgOut->setPagetitle( wfMsg( 'addedwatch' ) );
1627                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
1628
1629                         $link = wfEscapeWikiText( $this->mTitle->getPrefixedText() );
1630                         $text = wfMsg( 'addedwatchtext', $link );
1631                         $wgOut->addWikiText( $text );
1632                 }
1633
1634                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1635         }
1636
1637         /**
1638          * Add this page to $wgUser's watchlist
1639          * @return bool true on successful watch operation
1640          */
1641         function doWatch() {
1642                 global $wgUser;
1643                 if( $wgUser->isAnon() ) {
1644                         return false;
1645                 }
1646
1647                 if (wfRunHooks('WatchArticle', array(&$wgUser, &$this))) {
1648                         $wgUser->addWatch( $this->mTitle );
1649
1650                         return wfRunHooks('WatchArticleComplete', array(&$wgUser, &$this));
1651                 }
1652
1653                 return false;
1654         }
1655
1656         /**
1657          * User interface handler for the "unwatch" action.
1658          */
1659         function unwatch() {
1660
1661                 global $wgUser, $wgOut;
1662
1663                 if ( $wgUser->isAnon() ) {
1664                         $wgOut->showErrorPage( 'watchnologin', 'watchnologintext' );
1665                         return;
1666                 }
1667                 if ( wfReadOnly() ) {
1668                         $wgOut->readOnlyPage();
1669                         return;
1670                 }
1671
1672                 if( $this->doUnwatch() ) {
1673                         $wgOut->setPagetitle( wfMsg( 'removedwatch' ) );
1674                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
1675
1676                         $link = wfEscapeWikiText( $this->mTitle->getPrefixedText() );
1677                         $text = wfMsg( 'removedwatchtext', $link );
1678                         $wgOut->addWikiText( $text );
1679                 }
1680
1681                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1682         }
1683
1684         /**
1685          * Stop watching a page
1686          * @return bool true on successful unwatch
1687          */
1688         function doUnwatch() {
1689                 global $wgUser;
1690                 if( $wgUser->isAnon() ) {
1691                         return false;
1692                 }
1693
1694                 if (wfRunHooks('UnwatchArticle', array(&$wgUser, &$this))) {
1695                         $wgUser->removeWatch( $this->mTitle );
1696
1697                         return wfRunHooks('UnwatchArticleComplete', array(&$wgUser, &$this));
1698                 }
1699
1700                 return false;
1701         }
1702
1703         /**
1704          * action=protect handler
1705          */
1706         function protect() {
1707                 $form = new ProtectionForm( $this );
1708                 $form->execute();
1709         }
1710
1711         /**
1712          * action=unprotect handler (alias)
1713          */
1714         function unprotect() {
1715                 $this->protect();
1716         }
1717
1718         /**
1719          * Update the article's restriction field, and leave a log entry.
1720          *
1721          * @param array $limit set of restriction keys
1722          * @param string $reason
1723          * @return bool true on success
1724          */
1725         function updateRestrictions( $limit = array(), $reason = '', $cascade = 0, $expiry = null ) {
1726                 global $wgUser, $wgRestrictionTypes, $wgContLang;
1727
1728                 $id = $this->mTitle->getArticleID();
1729                 if( !$wgUser->isAllowed( 'protect' ) || wfReadOnly() || $id == 0 ) {
1730                         return false;
1731                 }
1732
1733                 if (!$cascade) {
1734                         $cascade = false;
1735                 }
1736
1737                 // Take this opportunity to purge out expired restrictions
1738                 Title::purgeExpiredRestrictions();
1739
1740                 # FIXME: Same limitations as described in ProtectionForm.php (line 37);
1741                 # we expect a single selection, but the schema allows otherwise.
1742                 $current = array();
1743                 foreach( $wgRestrictionTypes as $action )
1744                         $current[$action] = implode( '', $this->mTitle->getRestrictions( $action ) );
1745
1746                 $current = Article::flattenRestrictions( $current );
1747                 $updated = Article::flattenRestrictions( $limit );
1748
1749                 $changed = ( $current != $updated );
1750                 $changed = $changed || ($this->mTitle->areRestrictionsCascading() != $cascade);
1751                 $changed = $changed || ($this->mTitle->mRestrictionsExpiry != $expiry);
1752                 $protect = ( $updated != '' );
1753
1754                 # If nothing's changed, do nothing
1755                 if( $changed ) {
1756                         global $wgGroupPermissions;
1757                         if( wfRunHooks( 'ArticleProtect', array( &$this, &$wgUser, $limit, $reason ) ) ) {
1758
1759                                 $dbw = wfGetDB( DB_MASTER );
1760
1761                                 $encodedExpiry = Block::encodeExpiry($expiry, $dbw );
1762
1763                                 $expiry_description = '';
1764                                 if ( $encodedExpiry != 'infinity' ) {
1765                                         $expiry_description = ' (' . wfMsgForContent( 'protect-expiring', $wgContLang->timeanddate( $expiry ) ).')';
1766                                 }
1767
1768                                 # Prepare a null revision to be added to the history
1769                                 $modified = $current != '' && $protect;
1770                                 if ( $protect ) {
1771                                         $comment_type = $modified ? 'modifiedarticleprotection' : 'protectedarticle';
1772                                 } else {
1773                                         $comment_type = 'unprotectedarticle';
1774                                 }
1775                                 $comment = $wgContLang->ucfirst( wfMsgForContent( $comment_type, $this->mTitle->getPrefixedText() ) );
1776
1777                                 foreach( $limit as $action => $restrictions ) {
1778                                         # Check if the group level required to edit also can protect pages
1779                                         # Otherwise, people who cannot normally protect can "protect" pages via transclusion
1780                                         $cascade = ( $cascade && isset($wgGroupPermissions[$restrictions]['protect']) && $wgGroupPermissions[$restrictions]['protect'] );
1781                                 }
1782
1783                                 $cascade_description = '';
1784                                 if ($cascade) {
1785                                         $cascade_description = ' ['.wfMsg('protect-summary-cascade').']';
1786                                 }
1787
1788                                 if( $reason )
1789                                         $comment .= ": $reason";
1790                                 if( $protect )
1791                                         $comment .= " [$updated]";
1792                                 if ( $expiry_description && $protect )
1793                                         $comment .= "$expiry_description";
1794                                 if ( $cascade )
1795                                         $comment .= "$cascade_description";
1796
1797                                 $nullRevision = Revision::newNullRevision( $dbw, $id, $comment, true );
1798                                 $nullRevId = $nullRevision->insertOn( $dbw );
1799
1800                                 # Update restrictions table
1801                                 foreach( $limit as $action => $restrictions ) {
1802                                         if ($restrictions != '' ) {
1803                                                 $dbw->replace( 'page_restrictions', array(array('pr_page', 'pr_type')),
1804                                                         array( 'pr_page' => $id, 'pr_type' => $action
1805                                                                 , 'pr_level' => $restrictions, 'pr_cascade' => $cascade ? 1 : 0
1806                                                                 , 'pr_expiry' => $encodedExpiry ), __METHOD__  );
1807                                         } else {
1808                                                 $dbw->delete( 'page_restrictions', array( 'pr_page' => $id,
1809                                                         'pr_type' => $action ), __METHOD__ );
1810                                         }
1811                                 }
1812
1813                                 # Update page record
1814                                 $dbw->update( 'page',
1815                                         array( /* SET */
1816                                                 'page_touched' => $dbw->timestamp(),
1817                                                 'page_restrictions' => '',
1818                                                 'page_latest' => $nullRevId
1819                                         ), array( /* WHERE */
1820                                                 'page_id' => $id
1821                                         ), 'Article::protect'
1822                                 );
1823                                 wfRunHooks( 'ArticleProtectComplete', array( &$this, &$wgUser, $limit, $reason ) );
1824
1825                                 # Update the protection log
1826                                 $log = new LogPage( 'protect' );
1827
1828                                 if( $protect ) {
1829                                         $log->addEntry( $modified ? 'modify' : 'protect', $this->mTitle, trim( $reason . " [$updated]$cascade_description$expiry_description" ) );
1830                                 } else {
1831                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1832                                 }
1833
1834                         } # End hook
1835                 } # End "changed" check
1836
1837                 return true;
1838         }
1839
1840         /**
1841          * Take an array of page restrictions and flatten it to a string
1842          * suitable for insertion into the page_restrictions field.
1843          * @param array $limit
1844          * @return string
1845          * @private
1846          */
1847         function flattenRestrictions( $limit ) {
1848                 if( !is_array( $limit ) ) {
1849                         throw new MWException( 'Article::flattenRestrictions given non-array restriction set' );
1850                 }
1851                 $bits = array();
1852                 ksort( $limit );
1853                 foreach( $limit as $action => $restrictions ) {
1854                         if( $restrictions != '' ) {
1855                                 $bits[] = "$action=$restrictions";
1856                         }
1857                 }
1858                 return implode( ':', $bits );
1859         }
1860
1861         /*
1862          * UI entry point for page deletion
1863          */
1864         function delete() {
1865                 global $wgUser, $wgOut, $wgRequest;
1866                 $confirm = $wgRequest->wasPosted() &&
1867                         $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
1868                 $reason = $wgRequest->getText( 'wpReason' );
1869
1870                 # This code desperately needs to be totally rewritten
1871
1872                 # Check permissions
1873                 if( $wgUser->isAllowed( 'delete' ) ) {
1874                         if( $wgUser->isBlocked( !$confirm ) ) {
1875                                 $wgOut->blockedPage();
1876                                 return;
1877                         }
1878                 } else {
1879                         $wgOut->permissionRequired( 'delete' );
1880                         return;
1881                 }
1882
1883                 if( wfReadOnly() ) {
1884                         $wgOut->readOnlyPage();
1885                         return;
1886                 }
1887
1888                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1889
1890                 # Better double-check that it hasn't been deleted yet!
1891                 $dbw = wfGetDB( DB_MASTER );
1892                 $conds = $this->mTitle->pageCond();
1893                 $latest = $dbw->selectField( 'page', 'page_latest', $conds, __METHOD__ );
1894                 if ( $latest === false ) {
1895                         $wgOut->showFatalError( wfMsg( 'cannotdelete' ) );
1896                         return;
1897                 }
1898
1899                 if( $confirm ) {
1900                         $this->doDelete( $reason );
1901                         if( $wgRequest->getCheck( 'wpWatch' ) ) {
1902                                 $this->doWatch();
1903                         } elseif( $this->mTitle->userIsWatching() ) {
1904                                 $this->doUnwatch();
1905                         }
1906                         return;
1907                 }
1908
1909                 # determine whether this page has earlier revisions
1910                 # and insert a warning if it does
1911                 $maxRevisions = 20;
1912                 $authors = $this->getLastNAuthors( $maxRevisions, $latest );
1913
1914                 if( count( $authors ) > 1 && !$confirm ) {
1915                         $skin=$wgUser->getSkin();
1916                         $wgOut->addHTML( '<strong>' . wfMsg( 'historywarning' ) . ' ' . $skin->historyLink() . '</strong>' );
1917                 }
1918
1919                 # If a single user is responsible for all revisions, find out who they are
1920                 if ( count( $authors ) == $maxRevisions ) {
1921                         // Query bailed out, too many revisions to find out if they're all the same
1922                         $authorOfAll = false;
1923                 } else {
1924                         $authorOfAll = reset( $authors );
1925                         foreach ( $authors as $author ) {
1926                                 if ( $authorOfAll != $author ) {
1927                                         $authorOfAll = false;
1928                                         break;
1929                                 }
1930                         }
1931                 }
1932                 # Fetch article text
1933                 $rev = Revision::newFromTitle( $this->mTitle );
1934
1935                 if( !is_null( $rev ) ) {
1936                         # if this is a mini-text, we can paste part of it into the deletion reason
1937                         $text = $rev->getText();
1938
1939                         #if this is empty, an earlier revision may contain "useful" text
1940                         $blanked = false;
1941                         if( $text == '' ) {
1942                                 $prev = $rev->getPrevious();
1943                                 if( $prev ) {
1944                                         $text = $prev->getText();
1945                                         $blanked = true;
1946                                 }
1947                         }
1948
1949                         $length = strlen( $text );
1950
1951                         # this should not happen, since it is not possible to store an empty, new
1952                         # page. Let's insert a standard text in case it does, though
1953                         if( $length == 0 && $reason === '' ) {
1954                                 $reason = wfMsgForContent( 'exblank' );
1955                         }
1956
1957                         if( $reason === '' ) {
1958                                 # comment field=255, let's grep the first 150 to have some user
1959                                 # space left
1960                                 global $wgContLang;
1961                                 $text = $wgContLang->truncate( $text, 150, '...' );
1962
1963                                 # let's strip out newlines
1964                                 $text = preg_replace( "/[\n\r]/", '', $text );
1965
1966                                 if( !$blanked ) {
1967                                         if( $authorOfAll === false ) {
1968                                                 $reason = wfMsgForContent( 'excontent', $text );
1969                                         } else {
1970                                                 $reason = wfMsgForContent( 'excontentauthor', $text, $authorOfAll );
1971                                         }
1972                                 } else {
1973                                         $reason = wfMsgForContent( 'exbeforeblank', $text );
1974                                 }
1975                         }
1976                 }
1977
1978                 return $this->confirmDelete( '', $reason );
1979         }
1980
1981         /**
1982          * Get the last N authors
1983          * @param int $num Number of revisions to get
1984          * @param string $revLatest The latest rev_id, selected from the master (optional)
1985          * @return array Array of authors, duplicates not removed
1986          */
1987         function getLastNAuthors( $num, $revLatest = 0 ) {
1988                 wfProfileIn( __METHOD__ );
1989
1990                 // First try the slave
1991                 // If that doesn't have the latest revision, try the master
1992                 $continue = 2;
1993                 $db = wfGetDB( DB_SLAVE );
1994                 do {
1995                         $res = $db->select( array( 'page', 'revision' ),
1996                                 array( 'rev_id', 'rev_user_text' ),
1997                                 array(
1998                                         'page_namespace' => $this->mTitle->getNamespace(),
1999                                         'page_title' => $this->mTitle->getDBkey(),
2000                                         'rev_page = page_id'
2001                                 ), __METHOD__, $this->getSelectOptions( array(
2002                                         'ORDER BY' => 'rev_timestamp DESC',
2003                                         'LIMIT' => $num
2004                                 ) )
2005                         );
2006                         if ( !$res ) {
2007                                 wfProfileOut( __METHOD__ );
2008                                 return array();
2009                         }
2010                         $row = $db->fetchObject( $res );
2011                         if ( $continue == 2 && $revLatest && $row->rev_id != $revLatest ) {
2012                                 $db = wfGetDB( DB_MASTER );
2013                                 $continue--;
2014                         } else {
2015                                 $continue = 0;
2016                         }
2017                 } while ( $continue );
2018
2019                 $authors = array( $row->rev_user_text );
2020                 while ( $row = $db->fetchObject( $res ) ) {
2021                         $authors[] = $row->rev_user_text;
2022                 }
2023                 wfProfileOut( __METHOD__ );
2024                 return $authors;
2025         }
2026
2027         /**
2028          * Output deletion confirmation dialog
2029          */
2030         function confirmDelete( $par, $reason ) {
2031                 global $wgOut, $wgUser;
2032
2033                 wfDebug( "Article::confirmDelete\n" );
2034
2035                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
2036                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
2037                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
2038                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
2039
2040                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
2041
2042                 $confirm = htmlspecialchars( wfMsg( 'deletepage' ) );
2043                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
2044                 $token = htmlspecialchars( $wgUser->editToken() );
2045                 $watch = Xml::checkLabel( wfMsg( 'watchthis' ), 'wpWatch', 'wpWatch', $wgUser->getBoolOption( 'watchdeletion' ) || $this->mTitle->userIsWatching(), array( 'tabindex' => '2' ) );
2046
2047                 $wgOut->addHTML( "
2048 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
2049         <table border='0'>
2050                 <tr>
2051                         <td align='right'>
2052                                 <label for='wpReason'>{$delcom}:</label>
2053                         </td>
2054                         <td align='left'>
2055                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" tabindex=\"1\" />
2056                         </td>
2057                 </tr>
2058                 <tr>
2059                         <td>&nbsp;</td>
2060                         <td>$watch</td>
2061                 </tr>
2062                 <tr>
2063                         <td>&nbsp;</td>
2064                         <td>
2065                                 <input type='submit' name='wpConfirmB' id='wpConfirmB' value=\"{$confirm}\" tabindex=\"3\" />
2066                         </td>
2067                 </tr>
2068         </table>
2069         <input type='hidden' name='wpEditToken' value=\"{$token}\" />
2070 </form>\n" );
2071
2072                 $wgOut->returnToMain( false );
2073
2074                 $this->showLogExtract( $wgOut );
2075         }
2076
2077
2078         /**
2079          * Show relevant lines from the deletion log
2080          */
2081         function showLogExtract( $out ) {
2082                 $out->addHtml( '<h2>' . htmlspecialchars( LogPage::logName( 'delete' ) ) . '</h2>' );
2083                 $logViewer = new LogViewer(
2084                         new LogReader(
2085                                 new FauxRequest(
2086                                         array( 'page' => $this->mTitle->getPrefixedText(),
2087                                                'type' => 'delete' ) ) ) );
2088                 $logViewer->showList( $out );
2089         }
2090
2091
2092         /**
2093          * Perform a deletion and output success or failure messages
2094          */
2095         function doDelete( $reason ) {
2096                 global $wgOut, $wgUser;
2097                 wfDebug( __METHOD__."\n" );
2098
2099                 if (wfRunHooks('ArticleDelete', array(&$this, &$wgUser, &$reason))) {
2100                         if ( $this->doDeleteArticle( $reason ) ) {
2101                                 $deleted = wfEscapeWikiText( $this->mTitle->getPrefixedText() );
2102
2103                                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
2104                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
2105
2106                                 $loglink = '[[Special:Log/delete|' . wfMsg( 'deletionlog' ) . ']]';
2107                                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
2108
2109                                 $wgOut->addWikiText( $text );
2110                                 $wgOut->returnToMain( false );
2111                                 wfRunHooks('ArticleDeleteComplete', array(&$this, &$wgUser, $reason));
2112                         } else {
2113                                 $wgOut->showFatalError( wfMsg( 'cannotdelete' ) );
2114                         }
2115                 }
2116         }
2117
2118         /**
2119          * Back-end article deletion
2120          * Deletes the article with database consistency, writes logs, purges caches
2121          * Returns success
2122          */
2123         function doDeleteArticle( $reason ) {
2124                 global $wgUseSquid, $wgDeferredUpdateList;
2125                 global $wgUseTrackbacks;
2126
2127                 wfDebug( __METHOD__."\n" );
2128
2129                 $dbw = wfGetDB( DB_MASTER );
2130                 $ns = $this->mTitle->getNamespace();
2131                 $t = $this->mTitle->getDBkey();
2132                 $id = $this->mTitle->getArticleID();
2133
2134                 if ( $t == '' || $id == 0 ) {
2135                         return false;
2136                 }
2137
2138                 $u = new SiteStatsUpdate( 0, 1, -(int)$this->isCountable( $this->getContent() ), -1 );
2139                 array_push( $wgDeferredUpdateList, $u );
2140
2141                 // For now, shunt the revision data into the archive table.
2142                 // Text is *not* removed from the text table; bulk storage
2143                 // is left intact to avoid breaking block-compression or
2144                 // immutable storage schemes.
2145                 //
2146                 // For backwards compatibility, note that some older archive
2147                 // table entries will have ar_text and ar_flags fields still.
2148                 //
2149                 // In the future, we may keep revisions and mark them with
2150                 // the rev_deleted field, which is reserved for this purpose.
2151                 $dbw->insertSelect( 'archive', array( 'page', 'revision' ),
2152                         array(
2153                                 'ar_namespace'  => 'page_namespace',
2154                                 'ar_title'      => 'page_title',
2155                                 'ar_comment'    => 'rev_comment',
2156                                 'ar_user'       => 'rev_user',
2157                                 'ar_user_text'  => 'rev_user_text',
2158                                 'ar_timestamp'  => 'rev_timestamp',
2159                                 'ar_minor_edit' => 'rev_minor_edit',
2160                                 'ar_rev_id'     => 'rev_id',
2161                                 'ar_text_id'    => 'rev_text_id',
2162                                 'ar_text'       => '\'\'', // Be explicit to appease
2163                                 'ar_flags'      => '\'\'', // MySQL's "strict mode"...
2164                                 'ar_len'                => 'rev_len',
2165                                 'ar_page_id'    => 'page_id',
2166                         ), array(
2167                                 'page_id' => $id,
2168                                 'page_id = rev_page'
2169                         ), __METHOD__
2170                 );
2171
2172                 # Delete restrictions for it
2173                 $dbw->delete( 'page_restrictions', array ( 'pr_page' => $id ), __METHOD__ );
2174
2175                 # Now that it's safely backed up, delete it
2176                 $dbw->delete( 'page', array( 'page_id' => $id ), __METHOD__);
2177
2178                 # If using cascading deletes, we can skip some explicit deletes
2179                 if ( !$dbw->cascadingDeletes() ) {
2180
2181                         $dbw->delete( 'revision', array( 'rev_page' => $id ), __METHOD__ );
2182
2183                         if ($wgUseTrackbacks)
2184                                 $dbw->delete( 'trackbacks', array( 'tb_page' => $id ), __METHOD__ );
2185
2186                         # Delete outgoing links
2187                         $dbw->delete( 'pagelinks', array( 'pl_from' => $id ) );
2188                         $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
2189                         $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
2190                         $dbw->delete( 'templatelinks', array( 'tl_from' => $id ) );
2191                         $dbw->delete( 'externallinks', array( 'el_from' => $id ) );
2192                         $dbw->delete( 'langlinks', array( 'll_from' => $id ) );
2193                         $dbw->delete( 'redirect', array( 'rd_from' => $id ) );
2194                 }
2195
2196                 # If using cleanup triggers, we can skip some manual deletes
2197                 if ( !$dbw->cleanupTriggers() ) {
2198
2199                         # Clean up recentchanges entries...
2200                         $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), __METHOD__ );
2201                 }
2202
2203                 # Clear caches
2204                 Article::onArticleDelete( $this->mTitle );
2205
2206                 # Log the deletion
2207                 $log = new LogPage( 'delete' );
2208                 $log->addEntry( 'delete', $this->mTitle, $reason );
2209
2210                 # Clear the cached article id so the interface doesn't act like we exist
2211                 $this->mTitle->resetArticleID( 0 );
2212                 $this->mTitle->mArticleID = 0;
2213                 return true;
2214         }
2215
2216         /**
2217          * Roll back the most recent consecutive set of edits to a page
2218          * from the same user; fails if there are no eligible edits to
2219          * roll back to, e.g. user is the sole contributor
2220          *
2221          * @param string $fromP - Name of the user whose edits to rollback.
2222          * @param string $summary - Custom summary. Set to default summary if empty.
2223          * @param string $token - Rollback token.
2224          * @param bool $bot - If true, mark all reverted edits as bot.
2225          *
2226          * @param array $resultDetails contains result-specific dict of additional values
2227          *    ALREADY_ROLLED : 'current' (rev)
2228          *    SUCCESS        : 'summary' (str), 'current' (rev), 'target' (rev)
2229          *
2230          * @return self::SUCCESS on succes, self::* on failure
2231          */
2232         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails ) {
2233                 global $wgUser, $wgUseRCPatrol;
2234                 $resultDetails = null;
2235
2236                 if( $wgUser->isAllowed( 'rollback' ) ) {
2237                         if( $wgUser->isBlocked() ) {
2238                                 return self::BLOCKED;
2239                         }
2240                 } else {
2241                         return self::PERM_DENIED;
2242                 }
2243
2244                 if ( wfReadOnly() ) {
2245                         return self::READONLY;
2246                 }
2247                 if( !$wgUser->matchEditToken( $token, array( $this->mTitle->getPrefixedText(), $fromP ) ) )
2248                         return self::BAD_TOKEN;
2249
2250                 $dbw = wfGetDB( DB_MASTER );
2251
2252                 # Get the last editor
2253                 $current = Revision::newFromTitle( $this->mTitle );
2254                 if( is_null( $current ) ) {
2255                         # Something wrong... no page?
2256                         return self::BAD_TITLE;
2257                 }
2258
2259                 $from = str_replace( '_', ' ', $fromP );
2260                 if( $from != $current->getUserText() ) {
2261                         $resultDetails = array( 'current' => $current );
2262                         return self::ALREADY_ROLLED;
2263                 }
2264
2265                 # Get the last edit not by this guy
2266                 $user = intval( $current->getUser() );
2267                 $user_text = $dbw->addQuotes( $current->getUserText() );
2268                 $s = $dbw->selectRow( 'revision',
2269                         array( 'rev_id', 'rev_timestamp' ),
2270                         array(
2271                                 'rev_page' => $current->getPage(),
2272                                 "rev_user <> {$user} OR rev_user_text <> {$user_text}"
2273                         ), __METHOD__,
2274                         array(
2275                                 'USE INDEX' => 'page_timestamp',
2276                                 'ORDER BY'  => 'rev_timestamp DESC' )
2277                         );
2278                 if( $s === false ) {
2279                         # Something wrong
2280                         return self::ONLY_AUTHOR;
2281                 }
2282
2283                 $set = array();
2284                 if ( $bot ) {
2285                         # Mark all reverted edits as bot
2286                         $set['rc_bot'] = 1;
2287                 }
2288                 if ( $wgUseRCPatrol ) {
2289                         # Mark all reverted edits as patrolled
2290                         $set['rc_patrolled'] = 1;
2291                 }
2292
2293                 if ( $set ) {
2294                         $dbw->update( 'recentchanges', $set,
2295                                         array( /* WHERE */
2296                                                 'rc_cur_id' => $current->getPage(),
2297                                                 'rc_user_text' => $current->getUserText(),
2298                                                 "rc_timestamp > '{$s->rev_timestamp}'",
2299                                         ), __METHOD__
2300                                 );
2301                 }
2302
2303                 # Get the edit summary
2304                 $target = Revision::newFromId( $s->rev_id );
2305                 if( empty( $summary ) )
2306                         $summary = wfMsgForContent( 'revertpage', $target->getUserText(), $from );
2307
2308                 # Save
2309                 $flags = EDIT_UPDATE | EDIT_MINOR;
2310                 if( $bot )
2311                         $flags |= EDIT_FORCE_BOT;
2312                 $this->doEdit( $target->getText(), $summary, $flags );
2313
2314                 $resultDetails = array(
2315                         'summary' => $summary,
2316                         'current' => $current,
2317                         'target' => $target,
2318                 );
2319                 return self::SUCCESS;
2320         }
2321
2322         /**
2323          * User interface for rollback operations
2324          */
2325         function rollback() {
2326                 global $wgUser, $wgOut, $wgRequest, $wgUseRCPatrol;
2327
2328                 $details = null;
2329                 $result = $this->doRollback(
2330                         $wgRequest->getVal( 'from' ),
2331                         $wgRequest->getText( 'summary' ),
2332                         $wgRequest->getVal( 'token' ),
2333                         $wgRequest->getBool( 'bot' ),
2334                         $details
2335                 );
2336
2337                 switch( $result ) {
2338                         case self::BLOCKED:
2339                                 $wgOut->blockedPage();
2340                                 break;
2341                         case self::PERM_DENIED:
2342                                 $wgOut->permissionRequired( 'rollback' );
2343                                 break;
2344                         case self::READONLY:
2345                                 $wgOut->readOnlyPage( $this->getContent() );
2346                                 break;
2347                         case self::BAD_TOKEN:
2348                                 $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
2349                                 $wgOut->addWikiText( wfMsg( 'sessionfailure' ) );
2350                                 break;
2351                         case self::BAD_TITLE:
2352                                 $wgOut->addHtml( wfMsg( 'notanarticle' ) );
2353                                 break;
2354                         case self::ALREADY_ROLLED:
2355                                 $current = $details['current'];
2356                                 $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
2357                                 $wgOut->addWikiText(
2358                                         wfMsg( 'alreadyrolled',
2359                                                 htmlspecialchars( $this->mTitle->getPrefixedText() ),
2360                                                 htmlspecialchars( $wgRequest->getVal( 'from' ) ),
2361                                                 htmlspecialchars( $current->getUserText() )
2362                                         )
2363                                 );
2364                                 if( $current->getComment() != '' ) {
2365                                         $wgOut->addHtml( wfMsg( 'editcomment',
2366                                                 $wgUser->getSkin()->formatComment( $current->getComment() ) ) );
2367                                 }
2368                                 break;
2369                         case self::ONLY_AUTHOR:
2370                                 $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
2371                                 $wgOut->addHtml( wfMsg( 'cantrollback' ) );
2372                                 break;
2373                         case self::SUCCESS:
2374                                 $current = $details['current'];
2375                                 $target = $details['target'];
2376                                 $wgOut->setPageTitle( wfMsg( 'actioncomplete' ) );
2377                                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2378                                 $old = $wgUser->getSkin()->userLink( $current->getUser(), $current->getUserText() )
2379                                         . $wgUser->getSkin()->userToolLinks( $current->getUser(), $current->getUserText() );
2380                                 $new = $wgUser->getSkin()->userLink( $target->getUser(), $target->getUserText() )
2381                                         . $wgUser->getSkin()->userToolLinks( $target->getUser(), $target->getUserText() );
2382                                 $wgOut->addHtml( wfMsgExt( 'rollback-success', array( 'parse', 'replaceafter' ), $old, $new ) );
2383                                 $wgOut->returnToMain( false, $this->mTitle );
2384                                 break;
2385                         default:
2386                                 throw new MWException( __METHOD__ . ": Unknown return value `{$result}`" );
2387                 }
2388
2389         }
2390
2391
2392         /**
2393          * Do standard deferred updates after page view
2394          * @private
2395          */
2396         function viewUpdates() {
2397                 global $wgDeferredUpdateList;
2398
2399                 if ( 0 != $this->getID() ) {
2400                         global $wgDisableCounters;
2401                         if( !$wgDisableCounters ) {
2402                                 Article::incViewCount( $this->getID() );
2403                                 $u = new SiteStatsUpdate( 1, 0, 0 );
2404                                 array_push( $wgDeferredUpdateList, $u );
2405                         }
2406                 }
2407
2408                 # Update newtalk / watchlist notification status
2409                 global $wgUser;
2410                 $wgUser->clearNotification( $this->mTitle );
2411         }
2412
2413         /**
2414          * Do standard deferred updates after page edit.
2415          * Update links tables, site stats, search index and message cache.
2416          * Every 1000th edit, prune the recent changes table.
2417          *
2418          * @private
2419          * @param $text New text of the article
2420          * @param $summary Edit summary
2421          * @param $minoredit Minor edit
2422          * @param $timestamp_of_pagechange Timestamp associated with the page change
2423          * @param $newid rev_id value of the new revision
2424          * @param $changed Whether or not the content actually changed
2425          */
2426         function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange, $newid, $changed = true ) {
2427                 global $wgDeferredUpdateList, $wgMessageCache, $wgUser, $wgParser;
2428
2429                 wfProfileIn( __METHOD__ );
2430
2431                 # Parse the text
2432                 $options = new ParserOptions;
2433                 $options->setTidy(true);
2434                 $poutput = $wgParser->parse( $text, $this->mTitle, $options, true, true, $newid );
2435
2436                 # Save it to the parser cache
2437                 $parserCache =& ParserCache::singleton();
2438                 $parserCache->save( $poutput, $this, $wgUser );
2439
2440                 # Update the links tables
2441                 $u = new LinksUpdate( $this->mTitle, $poutput );
2442                 $u->doUpdate();
2443
2444                 if( wfRunHooks( 'ArticleEditUpdatesDeleteFromRecentchanges', array( &$this ) ) ) {
2445                         if ( 0 == mt_rand( 0, 99 ) ) {
2446                                 // Flush old entries from the `recentchanges` table; we do this on
2447                                 // random requests so as to avoid an increase in writes for no good reason
2448                                 global $wgRCMaxAge;
2449                                 $dbw = wfGetDB( DB_MASTER );
2450                                 $cutoff = $dbw->timestamp( time() - $wgRCMaxAge );
2451                                 $recentchanges = $dbw->tableName( 'recentchanges' );
2452                                 $sql = "DELETE FROM $recentchanges WHERE rc_timestamp < '{$cutoff}'";
2453                                 $dbw->query( $sql );
2454                         }
2455                 }
2456
2457                 $id = $this->getID();
2458                 $title = $this->mTitle->getPrefixedDBkey();
2459                 $shortTitle = $this->mTitle->getDBkey();
2460
2461                 if ( 0 == $id ) {
2462                         wfProfileOut( __METHOD__ );
2463                         return;
2464                 }
2465
2466                 $u = new SiteStatsUpdate( 0, 1, $this->mGoodAdjustment, $this->mTotalAdjustment );
2467                 array_push( $wgDeferredUpdateList, $u );
2468                 $u = new SearchUpdate( $id, $title, $text );
2469                 array_push( $wgDeferredUpdateList, $u );
2470
2471                 # If this is another user's talk page, update newtalk
2472                 # Don't do this if $changed = false otherwise some idiot can null-edit a
2473                 # load of user talk pages and piss people off, nor if it's a minor edit
2474                 # by a properly-flagged bot.
2475                 if( $this->mTitle->getNamespace() == NS_USER_TALK && $shortTitle != $wgUser->getTitleKey() && $changed
2476                         && !($minoredit && $wgUser->isAllowed('nominornewtalk') ) ) {
2477                         if (wfRunHooks('ArticleEditUpdateNewTalk', array(&$this)) ) {
2478                                 $other = User::newFromName( $shortTitle );
2479                                 if( is_null( $other ) && User::isIP( $shortTitle ) ) {
2480                                         // An anonymous user
2481                                         $other = new User();
2482                                         $other->setName( $shortTitle );
2483                                 }
2484                                 if( $other ) {
2485                                         $other->setNewtalk( true );
2486                                 }
2487                         }
2488                 }
2489
2490                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
2491                         $wgMessageCache->replace( $shortTitle, $text );
2492                 }
2493
2494                 wfProfileOut( __METHOD__ );
2495         }
2496
2497         /**
2498          * Perform article updates on a special page creation.
2499          *
2500          * @param Revision $rev
2501          *
2502          * @todo This is a shitty interface function. Kill it and replace the
2503          * other shitty functions like editUpdates and such so it's not needed
2504          * anymore.
2505          */
2506         function createUpdates( $rev ) {
2507                 $this->mGoodAdjustment = $this->isCountable( $rev->getText() );
2508                 $this->mTotalAdjustment = 1;
2509                 $this->editUpdates( $rev->getText(), $rev->getComment(),
2510                         $rev->isMinor(), wfTimestamp(), $rev->getId(), true );
2511         }
2512
2513         /**
2514          * Generate the navigation links when browsing through an article revisions
2515          * It shows the information as:
2516          *   Revision as of \<date\>; view current revision
2517          *   \<- Previous version | Next Version -\>
2518          *
2519          * @private
2520          * @param string $oldid         Revision ID of this article revision
2521          */
2522         function setOldSubtitle( $oldid=0 ) {
2523                 global $wgLang, $wgOut, $wgUser;
2524
2525                 if ( !wfRunHooks( 'DisplayOldSubtitle', array(&$this, &$oldid) ) ) {
2526                                 return;
2527                 }
2528
2529                 $revision = Revision::newFromId( $oldid );
2530
2531                 $current = ( $oldid == $this->mLatest );
2532                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
2533                 $sk = $wgUser->getSkin();
2534                 $lnk = $current
2535                         ? wfMsg( 'currentrevisionlink' )
2536                         : $lnk = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
2537                 $curdiff = $current
2538                         ? wfMsg( 'diff' )
2539                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'diff' ), 'diff=cur&oldid='.$oldid );
2540                 $prev = $this->mTitle->getPreviousRevisionID( $oldid ) ;
2541                 $prevlink = $prev
2542                         ? $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid )
2543                         : wfMsg( 'previousrevision' );
2544                 $prevdiff = $prev
2545                         ? $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'diff' ), 'diff=prev&oldid='.$oldid )
2546                         : wfMsg( 'diff' );
2547                 $nextlink = $current
2548                         ? wfMsg( 'nextrevision' )
2549                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
2550                 $nextdiff = $current
2551                         ? wfMsg( 'diff' )
2552                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'diff' ), 'diff=next&oldid='.$oldid );
2553
2554                 $userlinks = $sk->userLink( $revision->getUser(), $revision->getUserText() )
2555                                                 . $sk->userToolLinks( $revision->getUser(), $revision->getUserText() );
2556
2557                 $m = wfMsg( 'revision-info-current' );
2558                 $infomsg = $current && !wfEmptyMsg( 'revision-info-current', $m ) && $m != '-'
2559                         ? 'revision-info-current'
2560                         : 'revision-info';
2561
2562                 $r = "\n\t\t\t\t<div id=\"mw-{$infomsg}\">" . wfMsg( $infomsg, $td, $userlinks ) . "</div>\n" .
2563                      "\n\t\t\t\t<div id=\"mw-revision-nav\">" . wfMsg( 'revision-nav', $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff ) . "</div>\n\t\t\t";
2564                 $wgOut->setSubtitle( $r );
2565         }
2566
2567         /**
2568          * This function is called right before saving the wikitext,
2569          * so we can do things like signatures and links-in-context.
2570          *
2571          * @param string $text
2572          */
2573         function preSaveTransform( $text ) {
2574                 global $wgParser, $wgUser;
2575                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
2576         }
2577
2578         /* Caching functions */
2579
2580         /**
2581          * checkLastModified returns true if it has taken care of all
2582          * output to the client that is necessary for this request.
2583          * (that is, it has sent a cached version of the page)
2584          */
2585         function tryFileCache() {
2586                 static $called = false;
2587                 if( $called ) {
2588                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
2589                         return;
2590                 }
2591                 $called = true;
2592                 if($this->isFileCacheable()) {
2593                         $touched = $this->mTouched;
2594                         $cache = new HTMLFileCache( $this->mTitle );
2595                         if($cache->isFileCacheGood( $touched )) {
2596                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
2597                                 $cache->loadFromFileCache();
2598                                 return true;
2599                         } else {
2600                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
2601                                 ob_start( array(&$cache, 'saveToFileCache' ) );
2602                         }
2603                 } else {
2604                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
2605                 }
2606         }
2607
2608         /**
2609          * Check if the page can be cached
2610          * @return bool
2611          */
2612         function isFileCacheable() {
2613                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest, $wgLang, $wgContLang;
2614                 $action    = $wgRequest->getVal( 'action'    );
2615                 $oldid     = $wgRequest->getVal( 'oldid'     );
2616                 $diff      = $wgRequest->getVal( 'diff'      );
2617                 $redirect  = $wgRequest->getVal( 'redirect'  );
2618                 $printable = $wgRequest->getVal( 'printable' );
2619                 $page      = $wgRequest->getVal( 'page' );
2620
2621                 //check for non-standard user language; this covers uselang,
2622                 //and extensions for auto-detecting user language.
2623                 $ulang     = $wgLang->getCode();
2624                 $clang     = $wgContLang->getCode();
2625
2626                 $cacheable = $wgUseFileCache
2627                         && (!$wgShowIPinHeader)
2628                         && ($this->getID() != 0)
2629                         && ($wgUser->isAnon())
2630                         && (!$wgUser->getNewtalk())
2631                         && ($this->mTitle->getNamespace() != NS_SPECIAL )
2632                         && (empty( $action ) || $action == 'view')
2633                         && (!isset($oldid))
2634                         && (!isset($diff))
2635                         && (!isset($redirect))
2636                         && (!isset($printable))
2637                         && !isset($page)
2638                         && (!$this->mRedirectedFrom)
2639                         && ($ulang === $clang);
2640
2641                 if ( $cacheable ) {
2642                         //extension may have reason to disable file caching on some pages.
2643                         $cacheable = wfRunHooks( 'IsFileCacheable', array( $this ) );
2644                 }
2645
2646                 return $cacheable;
2647         }
2648
2649         /**
2650          * Loads page_touched and returns a value indicating if it should be used
2651          *
2652          */
2653         function checkTouched() {
2654                 if( !$this->mDataLoaded ) {
2655                         $this->loadPageData();
2656                 }
2657                 return !$this->mIsRedirect;
2658         }
2659
2660         /**
2661          * Get the page_touched field
2662          */
2663         function getTouched() {
2664                 # Ensure that page data has been loaded
2665                 if( !$this->mDataLoaded ) {
2666                         $this->loadPageData();
2667                 }
2668                 return $this->mTouched;
2669         }
2670
2671         /**
2672          * Get the page_latest field
2673          */
2674         function getLatest() {
2675                 if ( !$this->mDataLoaded ) {
2676                         $this->loadPageData();
2677                 }
2678                 return $this->mLatest;
2679         }
2680
2681         /**
2682          * Edit an article without doing all that other stuff
2683          * The article must already exist; link tables etc
2684          * are not updated, caches are not flushed.
2685          *
2686          * @param string $text text submitted
2687          * @param string $comment comment submitted
2688          * @param bool $minor whereas it's a minor modification
2689          */
2690         function quickEdit( $text, $comment = '', $minor = 0 ) {
2691                 wfProfileIn( __METHOD__ );
2692
2693                 $dbw = wfGetDB( DB_MASTER );
2694                 $dbw->begin();
2695                 $revision = new Revision( array(
2696                         'page'       => $this->getId(),
2697                         'text'       => $text,
2698                         'comment'    => $comment,
2699                         'minor_edit' => $minor ? 1 : 0,
2700                         ) );
2701                 $revision->insertOn( $dbw );
2702                 $this->updateRevisionOn( $dbw, $revision );
2703                 $dbw->commit();
2704
2705                 wfProfileOut( __METHOD__ );
2706         }
2707
2708         /**
2709          * Used to increment the view counter
2710          *
2711          * @static
2712          * @param integer $id article id
2713          */
2714         function incViewCount( $id ) {
2715                 $id = intval( $id );
2716                 global $wgHitcounterUpdateFreq, $wgDBtype;
2717
2718                 $dbw = wfGetDB( DB_MASTER );
2719                 $pageTable = $dbw->tableName( 'page' );
2720                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
2721                 $acchitsTable = $dbw->tableName( 'acchits' );
2722
2723                 if( $wgHitcounterUpdateFreq <= 1 ) {
2724                         $dbw->query( "UPDATE $pageTable SET page_counter = page_counter + 1 WHERE page_id = $id" );
2725                         return;
2726                 }
2727
2728                 # Not important enough to warrant an error page in case of failure
2729                 $oldignore = $dbw->ignoreErrors( true );
2730
2731                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2732
2733                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2734                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2735                         # Most of the time (or on SQL errors), skip row count check
2736                         $dbw->ignoreErrors( $oldignore );
2737                         return;
2738                 }
2739
2740                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2741                 $row = $dbw->fetchObject( $res );
2742                 $rown = intval( $row->n );
2743                 if( $rown >= $wgHitcounterUpdateFreq ){
2744                         wfProfileIn( 'Article::incViewCount-collect' );
2745                         $old_user_abort = ignore_user_abort( true );
2746
2747                         if ($wgDBtype == 'mysql')
2748                                 $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2749                         $tabletype = $wgDBtype == 'mysql' ? "ENGINE=HEAP " : '';
2750                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable $tabletype AS ".
2751                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2752                                 'GROUP BY hc_id');
2753                         $dbw->query("DELETE FROM $hitcounterTable");
2754                         if ($wgDBtype == 'mysql') {
2755                                 $dbw->query('UNLOCK TABLES');
2756                                 $dbw->query("UPDATE $pageTable,$acchitsTable SET page_counter=page_counter + hc_n ".
2757                                         'WHERE page_id = hc_id');
2758                         }
2759                         else {
2760                                 $dbw->query("UPDATE $pageTable SET page_counter=page_counter + hc_n ".
2761                                         "FROM $acchitsTable WHERE page_id = hc_id");
2762                         }
2763                         $dbw->query("DROP TABLE $acchitsTable");
2764
2765                         ignore_user_abort( $old_user_abort );
2766                         wfProfileOut( 'Article::incViewCount-collect' );
2767                 }
2768                 $dbw->ignoreErrors( $oldignore );
2769         }
2770
2771         /**#@+
2772          * The onArticle*() functions are supposed to be a kind of hooks
2773          * which should be called whenever any of the specified actions
2774          * are done.
2775          *
2776          * This is a good place to put code to clear caches, for instance.
2777          *
2778          * This is called on page move and undelete, as well as edit
2779          * @static
2780          * @param $title_obj a title object
2781          */
2782
2783         static function onArticleCreate($title) {
2784                 # The talk page isn't in the regular link tables, so we need to update manually:
2785                 if ( $title->isTalkPage() ) {
2786                         $other = $title->getSubjectPage();
2787                 } else {
2788                         $other = $title->getTalkPage();
2789                 }
2790                 $other->invalidateCache();
2791                 $other->purgeSquid();
2792
2793                 $title->touchLinks();
2794                 $title->purgeSquid();
2795         }
2796
2797         static function onArticleDelete( $title ) {
2798                 global $wgUseFileCache, $wgMessageCache;
2799
2800                 $title->touchLinks();
2801                 $title->purgeSquid();
2802
2803                 # File cache
2804                 if ( $wgUseFileCache ) {
2805                         $cm = new HTMLFileCache( $title );
2806                         @unlink( $cm->fileCacheName() );
2807                 }
2808
2809                 if( $title->getNamespace() == NS_MEDIAWIKI) {
2810                         $wgMessageCache->replace( $title->getDBkey(), false );
2811                 }
2812         }
2813
2814         /**
2815          * Purge caches on page update etc
2816          */
2817         static function onArticleEdit( $title ) {
2818                 global $wgDeferredUpdateList, $wgUseFileCache;
2819
2820                 // Invalidate caches of articles which include this page
2821                 $update = new HTMLCacheUpdate( $title, 'templatelinks' );
2822                 $wgDeferredUpdateList[] = $update;
2823
2824                 # Purge squid for this page only
2825                 $title->purgeSquid();
2826
2827                 # Clear file cache
2828                 if ( $wgUseFileCache ) {
2829                         $cm = new HTMLFileCache( $title );
2830                         @unlink( $cm->fileCacheName() );
2831                 }
2832         }
2833
2834         /**#@-*/
2835
2836         /**
2837          * Info about this page
2838          * Called for ?action=info when $wgAllowPageInfo is on.
2839          *
2840          * @public
2841          */
2842         function info() {
2843                 global $wgLang, $wgOut, $wgAllowPageInfo, $wgUser;
2844
2845                 if ( !$wgAllowPageInfo ) {
2846                         $wgOut->showErrorPage( 'nosuchaction', 'nosuchactiontext' );
2847                         return;
2848                 }
2849
2850                 $page = $this->mTitle->getSubjectPage();
2851
2852                 $wgOut->setPagetitle( $page->getPrefixedText() );
2853                 $wgOut->setPageTitleActionText( wfMsg( 'info_short' ) );
2854                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ) );
2855
2856                 if( !$this->mTitle->exists() ) {
2857                         $wgOut->addHtml( '<div class="noarticletext">' );
2858                         if( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
2859                                 // This doesn't quite make sense; the user is asking for
2860                                 // information about the _page_, not the message... -- RC
2861                                 $wgOut->addHtml( htmlspecialchars( wfMsgWeirdKey( $this->mTitle->getText() ) ) );
2862                         } else {
2863                                 $msg = $wgUser->isLoggedIn()
2864                                         ? 'noarticletext'
2865                                         : 'noarticletextanon';
2866                                 $wgOut->addHtml( wfMsgExt( $msg, 'parse' ) );
2867                         }
2868                         $wgOut->addHtml( '</div>' );
2869                 } else {
2870                         $dbr = wfGetDB( DB_SLAVE );
2871                         $wl_clause = array(
2872                                 'wl_title'     => $page->getDBkey(),
2873                                 'wl_namespace' => $page->getNamespace() );
2874                         $numwatchers = $dbr->selectField(
2875                                 'watchlist',
2876                                 'COUNT(*)',
2877                                 $wl_clause,
2878                                 __METHOD__,
2879                                 $this->getSelectOptions() );
2880
2881                         $pageInfo = $this->pageCountInfo( $page );
2882                         $talkInfo = $this->pageCountInfo( $page->getTalkPage() );
2883
2884                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $wgLang->formatNum( $numwatchers ) ) . '</li>' );
2885                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $wgLang->formatNum( $pageInfo['edits'] ) ) . '</li>');
2886                         if( $talkInfo ) {
2887                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $wgLang->formatNum( $talkInfo['edits'] ) ) . '</li>');
2888                         }
2889                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $wgLang->formatNum( $pageInfo['authors'] ) ) . '</li>' );
2890                         if( $talkInfo ) {
2891                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $wgLang->formatNum( $talkInfo['authors'] ) ) . '</li>' );
2892                         }
2893                         $wgOut->addHTML( '</ul>' );
2894
2895                 }
2896         }
2897
2898         /**
2899          * Return the total number of edits and number of unique editors
2900          * on a given page. If page does not exist, returns false.
2901          *
2902          * @param Title $title
2903          * @return array
2904          * @private
2905          */
2906         function pageCountInfo( $title ) {
2907                 $id = $title->getArticleId();
2908                 if( $id == 0 ) {
2909                         return false;
2910                 }
2911
2912                 $dbr = wfGetDB( DB_SLAVE );
2913
2914                 $rev_clause = array( 'rev_page' => $id );
2915
2916                 $edits = $dbr->selectField(
2917                         'revision',
2918                         'COUNT(rev_page)',
2919                         $rev_clause,
2920                         __METHOD__,
2921                         $this->getSelectOptions() );
2922
2923                 $authors = $dbr->selectField(
2924                         'revision',
2925                         'COUNT(DISTINCT rev_user_text)',
2926                         $rev_clause,
2927                         __METHOD__,
2928                         $this->getSelectOptions() );
2929
2930                 return array( 'edits' => $edits, 'authors' => $authors );
2931         }
2932
2933         /**
2934          * Return a list of templates used by this article.
2935          * Uses the templatelinks table
2936          *
2937          * @return array Array of Title objects
2938          */
2939         function getUsedTemplates() {
2940                 $result = array();
2941                 $id = $this->mTitle->getArticleID();
2942                 if( $id == 0 ) {
2943                         return array();
2944                 }
2945
2946                 $dbr = wfGetDB( DB_SLAVE );
2947                 $res = $dbr->select( array( 'templatelinks' ),
2948                         array( 'tl_namespace', 'tl_title' ),
2949                         array( 'tl_from' => $id ),
2950                         'Article:getUsedTemplates' );
2951                 if ( false !== $res ) {
2952                         if ( $dbr->numRows( $res ) ) {
2953                                 while ( $row = $dbr->fetchObject( $res ) ) {
2954                                         $result[] = Title::makeTitle( $row->tl_namespace, $row->tl_title );
2955                                 }
2956                         }
2957                 }
2958                 $dbr->freeResult( $res );
2959                 return $result;
2960         }
2961
2962         /**
2963          * Return an auto-generated summary if the text provided is a redirect.
2964          *
2965          * @param  string $text The wikitext to check
2966          * @return string '' or an appropriate summary
2967          */
2968         public static function getRedirectAutosummary( $text ) {
2969                 $rt = Title::newFromRedirect( $text );
2970                 if( is_object( $rt ) )
2971                         return wfMsgForContent( 'autoredircomment', $rt->getFullText() );
2972                 else
2973                         return '';
2974         }
2975
2976         /**
2977          * Return an auto-generated summary if the new text is much shorter than
2978          * the old text.
2979          *
2980          * @param  string $oldtext The previous text of the page
2981          * @param  string $text    The submitted text of the page
2982          * @return string An appropriate autosummary, or an empty string.
2983          */
2984         public static function getBlankingAutosummary( $oldtext, $text ) {
2985                 if ($oldtext!='' && $text=='') {
2986                         return wfMsgForContent('autosumm-blank');
2987                 } elseif (strlen($oldtext) > 10 * strlen($text) && strlen($text) < 500) {
2988                         #Removing more than 90% of the article
2989                         global $wgContLang;
2990                         $truncatedtext = $wgContLang->truncate($text, max(0, 200 - strlen(wfMsgForContent('autosumm-replace'))), '...');
2991                         return wfMsgForContent('autosumm-replace', $truncatedtext);
2992                 } else {
2993                         return '';
2994                 }
2995         }
2996
2997         /**
2998         * Return an applicable autosummary if one exists for the given edit.
2999         * @param string $oldtext The previous text of the page.
3000         * @param string $newtext The submitted text of the page.
3001         * @param bitmask $flags A bitmask of flags submitted for the edit.
3002         * @return string An appropriate autosummary, or an empty string.
3003         */
3004         public static function getAutosummary( $oldtext, $newtext, $flags ) {
3005
3006                 # This code is UGLY UGLY UGLY.
3007                 # Somebody PLEASE come up with a more elegant way to do it.
3008
3009                 #Redirect autosummaries
3010                 $summary = self::getRedirectAutosummary( $newtext );
3011
3012                 if ($summary)
3013                         return $summary;
3014
3015                 #Blanking autosummaries
3016                 if (!($flags & EDIT_NEW))
3017                         $summary = self::getBlankingAutosummary( $oldtext, $newtext );
3018
3019                 if ($summary)
3020                         return $summary;
3021
3022                 #New page autosummaries
3023                 if ($flags & EDIT_NEW && strlen($newtext)) {
3024                         #If they're making a new article, give its text, truncated, in the summary.
3025                         global $wgContLang;
3026                         $truncatedtext = $wgContLang->truncate(
3027                                 str_replace("\n", ' ', $newtext),
3028                                 max( 0, 200 - strlen( wfMsgForContent( 'autosumm-new') ) ),
3029                                 '...' );
3030                         $summary = wfMsgForContent( 'autosumm-new', $truncatedtext );
3031                 }
3032
3033                 if ($summary)
3034                         return $summary;
3035
3036                 return $summary;
3037         }
3038
3039         /**
3040          * Add the primary page-view wikitext to the output buffer
3041          * Saves the text into the parser cache if possible.
3042          * Updates templatelinks if it is out of date.
3043          *
3044          * @param string  $text
3045          * @param bool    $cache
3046          */
3047         public function outputWikiText( $text, $cache = true ) {
3048                 global $wgParser, $wgUser, $wgOut;
3049
3050                 $popts = $wgOut->parserOptions();
3051                 $popts->setTidy(true);
3052                 $parserOutput = $wgParser->parse( $text, $this->mTitle,
3053                         $popts, true, true, $this->getRevIdFetched() );
3054                 $popts->setTidy(false);
3055                 if ( $cache && $this && $parserOutput->getCacheTime() != -1 ) {
3056                         $parserCache =& ParserCache::singleton();
3057                         $parserCache->save( $parserOutput, $this, $wgUser );
3058                 }
3059
3060                 if ( !wfReadOnly() && $this->mTitle->areRestrictionsCascading() ) {
3061                         // templatelinks table may have become out of sync,
3062                         // especially if using variable-based transclusions.
3063                         // For paranoia, check if things have changed and if
3064                         // so apply updates to the database. This will ensure
3065                         // that cascaded protections apply as soon as the changes
3066                         // are visible.
3067
3068                         # Get templates from templatelinks
3069                         $id = $this->mTitle->getArticleID();
3070
3071                         $tlTemplates = array();
3072
3073                         $dbr = wfGetDB( DB_SLAVE );
3074                         $res = $dbr->select( array( 'templatelinks' ),
3075                                 array( 'tl_namespace', 'tl_title' ),
3076                                 array( 'tl_from' => $id ),
3077                                 'Article:getUsedTemplates' );
3078
3079                         global $wgContLang;
3080
3081                         if ( false !== $res ) {
3082                                 if ( $dbr->numRows( $res ) ) {
3083                                         while ( $row = $dbr->fetchObject( $res ) ) {
3084                                                 $tlTemplates[] = $wgContLang->getNsText( $row->tl_namespace ) . ':' . $row->tl_title ;
3085                                         }
3086                                 }
3087                         }
3088
3089                         # Get templates from parser output.
3090                         $poTemplates_allns = $parserOutput->getTemplates();
3091
3092                         $poTemplates = array ();
3093                         foreach ( $poTemplates_allns as $ns_templates ) {
3094                                 $poTemplates = array_merge( $poTemplates, $ns_templates );
3095                         }
3096
3097                         # Get the diff
3098                         $templates_diff = array_diff( $poTemplates, $tlTemplates );
3099
3100                         if ( count( $templates_diff ) > 0 ) {
3101                                 # Whee, link updates time.
3102                                 $u = new LinksUpdate( $this->mTitle, $parserOutput );
3103
3104                                 $dbw = wfGetDb( DB_MASTER );
3105                                 $dbw->begin();
3106
3107                                 $u->doUpdate();
3108
3109                                 $dbw->commit();
3110                         }
3111                 }
3112
3113                 $wgOut->addParserOutput( $parserOutput );
3114         }
3115
3116 }