includes/Article.php

   1 <?php
   2 /**
   3  * File for articles
   4  * @file
   5  */
   6
   7 /**
   8  * Class representing a MediaWiki article and history.
   9  *
  10  * See design.txt for an overview.
  11  * Note: edit user interface and cache support functions have been
  12  * moved to separate EditPage and HTMLFileCache classes.
  13  *
  14  */
  15 class Article {
  16         /**@{{
  17          * @private
  18          */
  19         var $mComment = '';               //!<
  20         var $mContent;                    //!<
  21         var $mContentLoaded = false;      //!<
  22         var $mCounter = -1;               //!< Not loaded
  23         var $mCurID = -1;                 //!< Not loaded
  24         var $mDataLoaded = false;         //!<
  25         var $mForUpdate = false;          //!<
  26         var $mGoodAdjustment = 0;         //!<
  27         var $mIsRedirect = false;         //!<
  28         var $mLatest = false;             //!<
  29         var $mMinorEdit;                  //!<
  30         var $mOldId;                      //!<
  31         var $mPreparedEdit = false;       //!< Title object if set
  32         var $mRedirectedFrom = null;      //!< Title object if set
  33         var $mRedirectTarget = null;      //!< Title object if set
  34         var $mRedirectUrl = false;        //!<
  35         var $mRevIdFetched = 0;           //!<
  36         var $mRevision;                   //!<
  37         var $mTimestamp = '';             //!<
  38         var $mTitle;                      //!<
  39         var $mTotalAdjustment = 0;        //!<
  40         var $mTouched = '19700101000000'; //!<
  41         var $mUser = -1;                  //!< Not loaded
  42         var $mUserText = '';              //!<
  43         /**@}}*/
  44
  45         /**
  46          * Constructor and clear the article
  47          * @param $title Reference to a Title object.
  48          * @param $oldId Integer revision ID, null to fetch from request, zero for current
  49          */
  50         function __construct( Title $title, $oldId = null ) {
  51                 $this->mTitle =& $title;
  52                 $this->mOldId = $oldId;
  53         }
  54
  55         /**
  56          * Constructor from an article article
  57          * @param $id The article ID to load
  58          */
  59         public static function newFromID( $id ) {
  60                 $t = Title::newFromID( $id );
  61
  62                 return $t == null ? null : new Article( $t );
  63         }
  64
  65         /**
  66          * Tell the page view functions that this view was redirected
  67          * from another page on the wiki.
  68          * @param $from Title object.
  69          */
  70         function setRedirectedFrom( $from ) {
  71                 $this->mRedirectedFrom = $from;
  72         }
  73
  74         /**
  75          * If this page is a redirect, get its target
  76          *
  77          * The target will be fetched from the redirect table if possible.
  78          * If this page doesn't have an entry there, call insertRedirect()
  79          * @return mixed Title object, or null if this page is not a redirect
  80          */
  81         public function getRedirectTarget() {
  82                 if(!$this->mTitle || !$this->mTitle->isRedirect())
  83                         return null;
  84                 if(!is_null($this->mRedirectTarget))
  85                         return $this->mRedirectTarget;
  86
  87                 # Query the redirect table
  88                 $dbr = wfGetDB(DB_SLAVE);
  89                 $res = $dbr->select('redirect',
  90                                 array('rd_namespace', 'rd_title'),
  91                                 array('rd_from' => $this->getID()),
  92                                 __METHOD__
  93                 );
  94                 $row = $dbr->fetchObject($res);
  95                 if($row)
  96                         return $this->mRedirectTarget = Title::makeTitle($row->rd_namespace, $row->rd_title);
  97
  98                 # This page doesn't have an entry in the redirect table
  99                 return $this->mRedirectTarget = $this->insertRedirect();
 100         }
 101
 102         /**
 103          * Insert an entry for this page into the redirect table.
 104          *
 105          * Don't call this function directly unless you know what you're doing.
 106          * @return Title object
 107          */
 108         public function insertRedirect() {
 109                 $retval = Title::newFromRedirect($this->getContent());
 110                 if(!$retval)
 111                         return null;
 112                 $dbw = wfGetDB(DB_MASTER);
 113                 $dbw->replace('redirect', array('rd_from'), array(
 114                                 'rd_from' => $this->getID(),
 115                                 'rd_namespace' => $retval->getNamespace(),
 116                                 'rd_title' => $retval->getDBKey()
 117                 ), __METHOD__);
 118                 return $retval;
 119         }
 120
 121         /**
 122          * Get the Title object this page redirects to
 123          *
 124          * @return mixed false, Title of in-wiki target, or string with URL
 125          */
 126         public function followRedirect() {
 127                 $text = $this->getContent();
 128                 return $this->followRedirectText( $text );
 129         }
 130
 131         /**
 132          * Get the Title object this text redirects to
 133          *
 134          * @return mixed false, Title of in-wiki target, or string with URL
 135          */
 136         public function followRedirectText( $text ) {
 137                 $rt = Title::newFromRedirect( $text );
 138                 # process if title object is valid and not special:userlogout
 139                 if( $rt ) {
 140                         if( $rt->getInterwiki() != '' ) {
 141                                 if( $rt->isLocal() ) {
 142                                         // Offsite wikis need an HTTP redirect.
 143                                         //
 144                                         // This can be hard to reverse and may produce loops,
 145                                         // so they may be disabled in the site configuration.
 146
 147                                         $source = $this->mTitle->getFullURL( 'redirect=no' );
 148                                         return $rt->getFullURL( 'rdfrom=' . urlencode( $source ) );
 149                                 }
 150                         } else {
 151                                 if( $rt->getNamespace() == NS_SPECIAL ) {
 152                                         // Gotta handle redirects to special pages differently:
 153                                         // Fill the HTTP response "Location" header and ignore
 154                                         // the rest of the page we're on.
 155                                         //
 156                                         // This can be hard to reverse, so they may be disabled.
 157
 158                                         if( $rt->isSpecial( 'Userlogout' ) ) {
 159                                                 // rolleyes
 160                                         } else {
 161                                                 return $rt->getFullURL();
 162                                         }
 163                                 }
 164                                 return $rt;
 165                         }
 166                 }
 167                 // No or invalid redirect
 168                 return false;
 169         }
 170
 171         /**
 172          * get the title object of the article
 173          */
 174         function getTitle() {
 175                 return $this->mTitle;
 176         }
 177
 178         /**
 179           * Clear the object
 180           * @private
 181           */
 182         function clear() {
 183                 $this->mDataLoaded    = false;
 184                 $this->mContentLoaded = false;
 185
 186                 $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
 187                 $this->mRedirectedFrom = null; # Title object if set
 188                 $this->mRedirectTarget = null; # Title object if set
 189                 $this->mUserText =
 190                 $this->mTimestamp = $this->mComment = '';
 191                 $this->mGoodAdjustment = $this->mTotalAdjustment = 0;
 192                 $this->mTouched = '19700101000000';
 193                 $this->mForUpdate = false;
 194                 $this->mIsRedirect = false;
 195                 $this->mRevIdFetched = 0;
 196                 $this->mRedirectUrl = false;
 197                 $this->mLatest = false;
 198                 $this->mPreparedEdit = false;
 199         }
 200
 201         /**
 202          * Note that getContent/loadContent do not follow redirects anymore.
 203          * If you need to fetch redirectable content easily, try
 204          * the shortcut in Article::followContent()
 205          * FIXME
 206          * @todo There are still side-effects in this!
 207          *        In general, you should use the Revision class, not Article,
 208          *        to fetch text for purposes other than page views.
 209          *
 210          * @return Return the text of this revision
 211         */
 212         function getContent() {
 213                 global $wgUser, $wgOut, $wgMessageCache;
 214
 215                 wfProfileIn( __METHOD__ );
 216
 217                 if ( 0 == $this->getID() ) {
 218                         wfProfileOut( __METHOD__ );
 219                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
 220
 221                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 222                                 $wgMessageCache->loadAllMessages();
 223                                 $ret = wfMsgWeirdKey ( $this->mTitle->getText() ) ;
 224                         } else {
 225                                 $ret = wfMsg( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon' );
 226                         }
 227
 228                         return "<div class='noarticletext'>\n$ret\n</div>";
 229                 } else {
 230                         $this->loadContent();
 231                         wfProfileOut( __METHOD__ );
 232                         return $this->mContent;
 233                 }
 234         }
 235
 236         /**
 237          * This function returns the text of a section, specified by a number ($section).
 238          * A section is text under a heading like == Heading == or \<h1\>Heading\</h1\>, or
 239          * the first section before any such heading (section 0).
 240          *
 241          * If a section contains subsections, these are also returned.
 242          *
 243          * @param $text String: text to look in
 244          * @param $section Integer: section number
 245          * @return string text of the requested section
 246          * @deprecated
 247          */
 248         function getSection($text,$section) {
 249                 global $wgParser;
 250                 return $wgParser->getSection( $text, $section );
 251         }
 252
 253         /**
 254          * @return int The oldid of the article that is to be shown, 0 for the
 255          *             current revision
 256          */
 257         function getOldID() {
 258                 if ( is_null( $this->mOldId ) ) {
 259                         $this->mOldId = $this->getOldIDFromRequest();
 260                 }
 261                 return $this->mOldId;
 262         }
 263
 264         /**
 265          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 266          *
 267          * @return int The old id for the request
 268          */
 269         public function getOldIDFromRequest() {
 270                 global $wgRequest;
 271                 $this->mRedirectUrl = false;
 272                 $oldid = $wgRequest->getVal( 'oldid' );
 273                 if ( isset( $oldid ) ) {
 274                         $oldid = intval( $oldid );
 275                         if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 276                                 $nextid = $this->mTitle->getNextRevisionID( $oldid );
 277                                 if ( $nextid  ) {
 278                                         $oldid = $nextid;
 279                                 } else {
 280                                         $this->mRedirectUrl = $this->mTitle->getFullURL( 'redirect=no' );
 281                                 }
 282                         } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 283                                 $previd = $this->mTitle->getPreviousRevisionID( $oldid );
 284                                 if ( $previd ) {
 285                                         $oldid = $previd;
 286                                 } else {
 287                                         # TODO
 288                                 }
 289                         }
 290                         # unused:
 291                         # $lastid = $oldid;
 292                 }
 293
 294                 if ( !$oldid ) {
 295                         $oldid = 0;
 296                 }
 297                 return $oldid;
 298         }
 299
 300         /**
 301          * Load the revision (including text) into this object
 302          */
 303         function loadContent() {
 304                 if ( $this->mContentLoaded ) return;
 305
 306                 # Query variables :P
 307                 $oldid = $this->getOldID();
 308
 309                 # Pre-fill content with error message so that if something
 310                 # fails we'll have something telling us what we intended.
 311                 $this->mOldId = $oldid;
 312                 $this->fetchContent( $oldid );
 313         }
 314
 315
 316         /**
 317          * Fetch a page record with the given conditions
 318          * @param Database $dbr
 319          * @param array    $conditions
 320          * @private
 321          */
 322         function pageData( $dbr, $conditions ) {
 323                 $fields = array(
 324                                 'page_id',
 325                                 'page_namespace',
 326                                 'page_title',
 327                                 'page_restrictions',
 328                                 'page_counter',
 329                                 'page_is_redirect',
 330                                 'page_is_new',
 331                                 'page_random',
 332                                 'page_touched',
 333                                 'page_latest',
 334                                 'page_len',
 335                 );
 336                 wfRunHooks( 'ArticlePageDataBefore', array( &$this, &$fields ) );
 337                 $row = $dbr->selectRow(
 338                         'page',
 339                         $fields,
 340                         $conditions,
 341                         __METHOD__
 342                 );
 343                 wfRunHooks( 'ArticlePageDataAfter', array( &$this, &$row ) );
 344                 return $row ;
 345         }
 346
 347         /**
 348          * @param Database $dbr
 349          * @param Title $title
 350          */
 351         function pageDataFromTitle( $dbr, $title ) {
 352                 return $this->pageData( $dbr, array(
 353                         'page_namespace' => $title->getNamespace(),
 354                         'page_title'     => $title->getDBkey() ) );
 355         }
 356
 357         /**
 358          * @param Database $dbr
 359          * @param int $id
 360          */
 361         function pageDataFromId( $dbr, $id ) {
 362                 return $this->pageData( $dbr, array( 'page_id' => $id ) );
 363         }
 364
 365         /**
 366          * Set the general counter, title etc data loaded from
 367          * some source.
 368          *
 369          * @param object $data
 370          * @private
 371          */
 372         function loadPageData( $data = 'fromdb' ) {
 373                 if ( $data === 'fromdb' ) {
 374                         $dbr = wfGetDB( DB_MASTER );
 375                         $data = $this->pageDataFromId( $dbr, $this->getId() );
 376                 }
 377
 378                 $lc = LinkCache::singleton();
 379                 if ( $data ) {
 380                         $lc->addGoodLinkObj( $data->page_id, $this->mTitle, $data->page_len, $data->page_is_redirect );
 381
 382                         $this->mTitle->mArticleID = $data->page_id;
 383
 384                         # Old-fashioned restrictions.
 385                         $this->mTitle->loadRestrictions( $data->page_restrictions );
 386
 387                         $this->mCounter     = $data->page_counter;
 388                         $this->mTouched     = wfTimestamp( TS_MW, $data->page_touched );
 389                         $this->mIsRedirect  = $data->page_is_redirect;
 390                         $this->mLatest      = $data->page_latest;
 391                 } else {
 392                         if ( is_object( $this->mTitle ) ) {
 393                                 $lc->addBadLinkObj( $this->mTitle );
 394                         }
 395                         $this->mTitle->mArticleID = 0;
 396                 }
 397
 398                 $this->mDataLoaded  = true;
 399         }
 400
 401         /**
 402          * Get text of an article from database
 403          * Does *NOT* follow redirects.
 404          * @param int $oldid 0 for whatever the latest revision is
 405          * @return string
 406          */
 407         function fetchContent( $oldid = 0 ) {
 408                 if ( $this->mContentLoaded ) {
 409                         return $this->mContent;
 410                 }
 411
 412                 $dbr = wfGetDB( DB_MASTER );
 413
 414                 # Pre-fill content with error message so that if something
 415                 # fails we'll have something telling us what we intended.
 416                 $t = $this->mTitle->getPrefixedText();
 417                 $d = $oldid ? wfMsgExt( 'missingarticle-rev', array( 'escape' ), $oldid ) : '';
 418                 $this->mContent = wfMsg( 'missing-article', $t, $d ) ;
 419
 420                 if( $oldid ) {
 421                         $revision = Revision::newFromId( $oldid );
 422                         if( is_null( $revision ) ) {
 423                                 wfDebug( __METHOD__." failed to retrieve specified revision, id $oldid\n" );
 424                                 return false;
 425                         }
 426                         $data = $this->pageDataFromId( $dbr, $revision->getPage() );
 427                         if( !$data ) {
 428                                 wfDebug( __METHOD__." failed to get page data linked to revision id $oldid\n" );
 429                                 return false;
 430                         }
 431                         $this->mTitle = Title::makeTitle( $data->page_namespace, $data->page_title );
 432                         $this->loadPageData( $data );
 433                 } else {
 434                         if( !$this->mDataLoaded ) {
 435                                 $data = $this->pageDataFromTitle( $dbr, $this->mTitle );
 436                                 if( !$data ) {
 437                                         wfDebug( __METHOD__." failed to find page data for title " . $this->mTitle->getPrefixedText() . "\n" );
 438                                         return false;
 439                                 }
 440                                 $this->loadPageData( $data );
 441                         }
 442                         $revision = Revision::newFromId( $this->mLatest );
 443                         if( is_null( $revision ) ) {
 444                                 wfDebug( __METHOD__." failed to retrieve current page, rev_id {$this->mLatest}\n" );
 445                                 return false;
 446                         }
 447                 }
 448
 449                 // FIXME: Horrible, horrible! This content-loading interface just plain sucks.
 450                 // We should instead work with the Revision object when we need it...
 451                 $this->mContent   = $revision->getText( Revision::FOR_THIS_USER ); // Loads if user is allowed
 452
 453                 $this->mUser      = $revision->getUser();
 454                 $this->mUserText  = $revision->getUserText();
 455                 $this->mComment   = $revision->getComment();
 456                 $this->mTimestamp = wfTimestamp( TS_MW, $revision->getTimestamp() );
 457
 458                 $this->mRevIdFetched = $revision->getId();
 459                 $this->mContentLoaded = true;
 460                 $this->mRevision =& $revision;
 461
 462                 wfRunHooks( 'ArticleAfterFetchContent', array( &$this, &$this->mContent ) ) ;
 463
 464                 return $this->mContent;
 465         }
 466
 467         /**
 468          * Read/write accessor to select FOR UPDATE
 469          *
 470          * @param $x Mixed: FIXME
 471          */
 472         function forUpdate( $x = NULL ) {
 473                 return wfSetVar( $this->mForUpdate, $x );
 474         }
 475
 476         /**
 477          * Get the database which should be used for reads
 478          *
 479          * @return Database
 480          * @deprecated - just call wfGetDB( DB_MASTER ) instead
 481          */
 482         function getDB() {
 483                 wfDeprecated( __METHOD__ );
 484                 return wfGetDB( DB_MASTER );
 485         }
 486
 487         /**
 488          * Get options for all SELECT statements
 489          *
 490          * @param $options Array: an optional options array which'll be appended to
 491          *                       the default
 492          * @return Array: options
 493          */
 494         function getSelectOptions( $options = '' ) {
 495                 if ( $this->mForUpdate ) {
 496                         if ( is_array( $options ) ) {
 497                                 $options[] = 'FOR UPDATE';
 498                         } else {
 499                                 $options = 'FOR UPDATE';
 500                         }
 501                 }
 502                 return $options;
 503         }
 504
 505         /**
 506          * @return int Page ID
 507          */
 508         function getID() {
 509                 if( $this->mTitle ) {
 510                         return $this->mTitle->getArticleID();
 511                 } else {
 512                         return 0;
 513                 }
 514         }
 515
 516         /**
 517          * @return bool Whether or not the page exists in the database
 518          */
 519         function exists() {
 520                 return $this->getId() != 0;
 521         }
 522
 523         /**
 524          * @return int The view count for the page
 525          */
 526         function getCount() {
 527                 if ( -1 == $this->mCounter ) {
 528                         $id = $this->getID();
 529                         if ( $id == 0 ) {
 530                                 $this->mCounter = 0;
 531                         } else {
 532                                 $dbr = wfGetDB( DB_SLAVE );
 533                                 $this->mCounter = $dbr->selectField( 'page', 'page_counter', array( 'page_id' => $id ),
 534                                         'Article::getCount', $this->getSelectOptions() );
 535                         }
 536                 }
 537                 return $this->mCounter;
 538         }
 539
 540         /**
 541          * Determine whether a page  would be suitable for being counted as an
 542          * article in the site_stats table based on the title & its content
 543          *
 544          * @param $text String: text to analyze
 545          * @return bool
 546          */
 547         function isCountable( $text ) {
 548                 global $wgUseCommaCount;
 549
 550                 $token = $wgUseCommaCount ? ',' : '[[';
 551                 return
 552                         $this->mTitle->isContentPage()
 553                         && !$this->isRedirect( $text )
 554                         && in_string( $token, $text );
 555         }
 556
 557         /**
 558          * Tests if the article text represents a redirect
 559          *
 560          * @param $text String: FIXME
 561          * @return bool
 562          */
 563         function isRedirect( $text = false ) {
 564                 if ( $text === false ) {
 565                         if ( $this->mDataLoaded )
 566                                 return $this->mIsRedirect;
 567
 568                         // Apparently loadPageData was never called
 569                         $this->loadContent();
 570                         $titleObj = Title::newFromRedirect( $this->fetchContent() );
 571                 } else {
 572                         $titleObj = Title::newFromRedirect( $text );
 573                 }
 574                 return $titleObj !== NULL;
 575         }
 576
 577         function isDisambig() {
 578                 global $wgParser;
 579                 $this->loadContent();
 580                 $output = $wgParser->parse( $this->fetchContent(), $this->mTitle, new ParserOptions() );
 581                 $templates = $output->getTemplates();
 582                 $disambigs = wfGetDisambiguationTemplates();
 583                 if( isset( $templates[NS_TEMPLATE] ) )
 584                         foreach( $templates[NS_TEMPLATE] as $dbk => $id )
 585                                 foreach( $disambigs as $disambig )
 586                                         if( $disambig->getDBkey() == $dbk )
 587                                                 return true;
 588                 return false;
 589         }
 590
 591         /**
 592          * Returns true if the currently-referenced revision is the current edit
 593          * to this page (and it exists).
 594          * @return bool
 595          */
 596         function isCurrent() {
 597                 # If no oldid, this is the current version.
 598                 if ($this->getOldID() == 0)
 599                         return true;
 600
 601                 return $this->exists() &&
 602                         isset( $this->mRevision ) &&
 603                         $this->mRevision->isCurrent();
 604         }
 605
 606         /**
 607          * Loads everything except the text
 608          * This isn't necessary for all uses, so it's only done if needed.
 609          * @private
 610          */
 611         function loadLastEdit() {
 612                 if ( -1 != $this->mUser )
 613                         return;
 614
 615                 # New or non-existent articles have no user information
 616                 $id = $this->getID();
 617                 if ( 0 == $id ) return;
 618
 619                 $this->mLastRevision = Revision::loadFromPageId( wfGetDB( DB_MASTER ), $id );
 620                 if( !is_null( $this->mLastRevision ) ) {
 621                         $this->mUser      = $this->mLastRevision->getUser();
 622                         $this->mUserText  = $this->mLastRevision->getUserText();
 623                         $this->mTimestamp = $this->mLastRevision->getTimestamp();
 624                         $this->mComment   = $this->mLastRevision->getComment();
 625                         $this->mMinorEdit = $this->mLastRevision->isMinor();
 626                         $this->mRevIdFetched = $this->mLastRevision->getId();
 627                 }
 628         }
 629
 630         function getTimestamp() {
 631                 // Check if the field has been filled by ParserCache::get()
 632                 if ( !$this->mTimestamp ) {
 633                         $this->loadLastEdit();
 634                 }
 635                 return wfTimestamp(TS_MW, $this->mTimestamp);
 636         }
 637
 638         function getUser() {
 639                 $this->loadLastEdit();
 640                 return $this->mUser;
 641         }
 642
 643         function getUserText() {
 644                 $this->loadLastEdit();
 645                 return $this->mUserText;
 646         }
 647
 648         function getComment() {
 649                 $this->loadLastEdit();
 650                 return $this->mComment;
 651         }
 652
 653         function getMinorEdit() {
 654                 $this->loadLastEdit();
 655                 return $this->mMinorEdit;
 656         }
 657
 658         function getRevIdFetched() {
 659                 $this->loadLastEdit();
 660                 return $this->mRevIdFetched;
 661         }
 662
 663         /**
 664          * @param $limit Integer: default 0.
 665          * @param $offset Integer: default 0.
 666          */
 667         function getContributors($limit = 0, $offset = 0) {
 668                 # XXX: this is expensive; cache this info somewhere.
 669
 670                 $contribs = array();
 671                 $dbr = wfGetDB( DB_SLAVE );
 672                 $revTable = $dbr->tableName( 'revision' );
 673                 $userTable = $dbr->tableName( 'user' );
 674                 $user = $this->getUser();
 675                 $pageId = $this->getId();
 676
 677                 $sql = "SELECT {$userTable}.*, MAX(rev_timestamp) as timestamp
 678                         FROM $revTable LEFT JOIN $userTable ON rev_user = user_id
 679                         WHERE rev_page = $pageId
 680                         AND rev_user != $user
 681                         GROUP BY rev_user, rev_user_text, user_real_name
 682                         ORDER BY timestamp DESC";
 683
 684                 if ($limit > 0) { $sql .= ' LIMIT '.$limit; }
 685                 if ($offset > 0) { $sql .= ' OFFSET '.$offset; }
 686
 687                 $sql .= ' '. $this->getSelectOptions();
 688
 689                 $res = $dbr->query($sql, __METHOD__ );
 690
 691                 return new UserArrayFromResult( $res );
 692         }
 693
 694         /**
 695          * This is the default action of the script: just view the page of
 696          * the given title.
 697         */
 698         function view() {
 699                 global $wgUser, $wgOut, $wgRequest, $wgContLang;
 700                 global $wgEnableParserCache, $wgStylePath, $wgParser;
 701                 global $wgUseTrackbacks, $wgNamespaceRobotPolicies, $wgArticleRobotPolicies;
 702                 global $wgDefaultRobotPolicy;
 703                 $sk = $wgUser->getSkin();
 704
 705                 wfProfileIn( __METHOD__ );
 706
 707                 $parserCache = ParserCache::singleton();
 708                 $ns = $this->mTitle->getNamespace(); # shortcut
 709
 710                 # Get variables from query string
 711                 $oldid = $this->getOldID();
 712
 713                 # getOldID may want us to redirect somewhere else
 714                 if ( $this->mRedirectUrl ) {
 715                         $wgOut->redirect( $this->mRedirectUrl );
 716                         wfProfileOut( __METHOD__ );
 717                         return;
 718                 }
 719
 720                 $diff = $wgRequest->getVal( 'diff' );
 721                 $rcid = $wgRequest->getVal( 'rcid' );
 722                 $rdfrom = $wgRequest->getVal( 'rdfrom' );
 723                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
 724                 $purge = $wgRequest->getVal( 'action' ) == 'purge';
 725
 726                 $wgOut->setArticleFlag( true );
 727
 728                 # Discourage indexing of printable versions, but encourage following
 729                 if( $wgOut->isPrintable() ) {
 730                         $policy = 'noindex,follow';
 731                 } elseif ( isset( $wgArticleRobotPolicies[$this->mTitle->getPrefixedText()] ) ) {
 732                         $policy = $wgArticleRobotPolicies[$this->mTitle->getPrefixedText()];
 733                 } elseif( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 734                         # Honour customised robot policies for this namespace
 735                         $policy = $wgNamespaceRobotPolicies[$ns];
 736                 } else {
 737                         $policy = $wgDefaultRobotPolicy;
 738                 }
 739                 $wgOut->setRobotPolicy( $policy );
 740
 741                 # If we got diff and oldid in the query, we want to see a
 742                 # diff page instead of the article.
 743
 744                 if ( !is_null( $diff ) ) {
 745                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 746
 747                         $diff = $wgRequest->getVal( 'diff' );
 748                         $htmldiff = $wgRequest->getVal( 'htmldiff' , false);
 749                         $de = new DifferenceEngine( $this->mTitle, $oldid, $diff, $rcid, $purge, $htmldiff);
 750                         // DifferenceEngine directly fetched the revision:
 751                         $this->mRevIdFetched = $de->mNewid;
 752                         $de->showDiffPage( $diffOnly );
 753
 754                         // Needed to get the page's current revision
 755                         $this->loadPageData();
 756                         if( $diff == 0 || $diff == $this->mLatest ) {
 757                                 # Run view updates for current revision only
 758                                 $this->viewUpdates();
 759                         }
 760                         wfProfileOut( __METHOD__ );
 761                         return;
 762                 }
 763
 764                 if ( empty( $oldid ) && $this->checkTouched() ) {
 765                         $wgOut->setETag($parserCache->getETag($this, $wgUser));
 766
 767                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 768                                 wfProfileOut( __METHOD__ );
 769                                 return;
 770                         } else if ( $this->tryFileCache() ) {
 771                                 # tell wgOut that output is taken care of
 772                                 $wgOut->disable();
 773                                 $this->viewUpdates();
 774                                 wfProfileOut( __METHOD__ );
 775                                 return;
 776                         }
 777                 }
 778
 779                 # Should the parser cache be used?
 780                 $pcache = $this->useParserCache( $oldid );
 781                 wfDebug( 'Article::view using parser cache: ' . ($pcache ? 'yes' : 'no' ) . "\n" );
 782                 if ( $wgUser->getOption( 'stubthreshold' ) ) {
 783                         wfIncrStats( 'pcache_miss_stub' );
 784                 }
 785
 786                 $wasRedirected = false;
 787                 if ( isset( $this->mRedirectedFrom ) ) {
 788                         // This is an internally redirected page view.
 789                         // We'll need a backlink to the source page for navigation.
 790                         if ( wfRunHooks( 'ArticleViewRedirect', array( &$this ) ) ) {
 791                                 $redir = $sk->makeKnownLinkObj( $this->mRedirectedFrom, '', 'redirect=no' );
 792                                 $s = wfMsg( 'redirectedfrom', $redir );
 793                                 $wgOut->setSubtitle( $s );
 794
 795                                 // Set the fragment if one was specified in the redirect
 796                                 if ( strval( $this->mTitle->getFragment() ) != '' ) {
 797                                         $fragment = Xml::escapeJsString( $this->mTitle->getFragmentForURL() );
 798                                         $wgOut->addInlineScript( "redirectToFragment(\"$fragment\");" );
 799                                 }
 800                                 $wasRedirected = true;
 801                         }
 802                 } elseif ( !empty( $rdfrom ) ) {
 803                         // This is an externally redirected view, from some other wiki.
 804                         // If it was reported from a trusted site, supply a backlink.
 805                         global $wgRedirectSources;
 806                         if( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 807                                 $redir = $sk->makeExternalLink( $rdfrom, $rdfrom );
 808                                 $s = wfMsg( 'redirectedfrom', $redir );
 809                                 $wgOut->setSubtitle( $s );
 810                                 $wasRedirected = true;
 811                         }
 812                 }
 813
 814                 $outputDone = false;
 815                 wfRunHooks( 'ArticleViewHeader', array( &$this, &$outputDone, &$pcache ) );
 816                 if ( $pcache ) {
 817                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 818                                 // Ensure that UI elements requiring revision ID have
 819                                 // the correct version information.
 820                                 $wgOut->setRevisionId( $this->mLatest );
 821                                 $outputDone = true;
 822                         }
 823                 }
 824                 # Fetch content and check for errors
 825                 if ( !$outputDone ) {
 826                         # If the article does not exist and was deleted, show the log
 827                         if ($this->getID() == 0) {
 828                                 $loglist = new LogEventsList( $wgUser->getSkin(), $wgOut );
 829                                 $pager = new LogPager( $loglist, 'delete', false, $this->mTitle->getPrefixedText() );
 830                                 $count = $pager->getNumRows();
 831                                 if( $count > 0 ) {
 832                                         $pager->mLimit = 10;
 833                                         $wgOut->addHTML( '<div class="mw-warning-with-logexcerpt">' );
 834                                         $wgOut->addWikiMsg( 'deleted-notice' );
 835                                         $wgOut->addHTML(
 836                                                 $loglist->beginLogEventsList() .
 837                                                 $pager->getBody() .
 838                                                 $loglist->endLogEventsList()
 839                                         );
 840                                         if($count > 10){
 841                                                 $wgOut->addHTML( $wgUser->getSkin()->link(
 842                                                         SpecialPage::getTitleFor( 'Log' ),
 843                                                         wfMsgHtml( 'deletelog-fulllog' ),
 844                                                         array(),
 845                                                         array(
 846                                                                 'type' => 'delete',
 847                                                                 'page' => $this->mTitle->getPrefixedText() ) ) );
 848                                         }
 849                                         $wgOut->addHTML( '</div>' );
 850                                 }
 851                         }
 852                         $text = $this->getContent();
 853                         if ( $text === false ) {
 854                                 # Failed to load, replace text with error message
 855                                 $t = $this->mTitle->getPrefixedText();
 856                                 if( $oldid ) {
 857                                         $d = wfMsgExt( 'missingarticle-rev', array( 'escape' ), $oldid );
 858                                         $text = wfMsg( 'missing-article', $t, $d );
 859                                 } else {
 860                                         $text = wfMsg( 'noarticletext' );
 861                                 }
 862                         }
 863
 864                         # Another whitelist check in case oldid is altering the title
 865                         if ( !$this->mTitle->userCanRead() ) {
 866                                 $wgOut->loginToUse();
 867                                 $wgOut->output();
 868                                 wfProfileOut( __METHOD__ );
 869                                 exit;
 870                         }
 871
 872                         # We're looking at an old revision
 873                         if ( !empty( $oldid ) ) {
 874                                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
 875                                 if( is_null( $this->mRevision ) ) {
 876                                         // FIXME: This would be a nice place to load the 'no such page' text.
 877                                 } else {
 878                                         $this->setOldSubtitle( isset($this->mOldId) ? $this->mOldId : $oldid );
 879                                         if( $this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
 880                                                 if( !$this->mRevision->userCan( Revision::DELETED_TEXT ) ) {
 881                                                         $wgOut->addWikiMsg( 'rev-deleted-text-permission' );
 882                                                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 883                                                         wfProfileOut( __METHOD__ );
 884                                                         return;
 885                                                 } else {
 886                                                         $wgOut->addWikiMsg( 'rev-deleted-text-view' );
 887                                                         // and we are allowed to see...
 888                                                 }
 889                                         }
 890                                 }
 891                         }
 892
 893                         $wgOut->setRevisionId( $this->getRevIdFetched() );
 894
 895                          // Pages containing custom CSS or JavaScript get special treatment
 896                         if( $this->mTitle->isCssOrJsPage() || $this->mTitle->isCssJsSubpage() ) {
 897                                 $wgOut->addHTML( wfMsgExt( 'clearyourcache', 'parse' ) );
 898                                 // Give hooks a chance to customise the output
 899                                 if( wfRunHooks( 'ShowRawCssJs', array( $this->mContent, $this->mTitle, $wgOut ) ) ) {
 900                                         // Wrap the whole lot in a <pre> and don't parse
 901                                         $m = array();
 902                                         preg_match( '!\.(css|js)$!u', $this->mTitle->getText(), $m );
 903                                         $wgOut->addHTML( "<pre class=\"mw-code mw-{$m[1]}\" dir=\"ltr\">\n" );
 904                                         $wgOut->addHTML( htmlspecialchars( $this->mContent ) );
 905                                         $wgOut->addHTML( "\n</pre>\n" );
 906                                 }
 907                         } else if ( $rt = Title::newFromRedirect( $text ) ) {
 908                                 # Don't append the subtitle if this was an old revision
 909                                 $wgOut->addHTML( $this->viewRedirect( $rt, !$wasRedirected && $this->isCurrent() ) );
 910                                 $parseout = $wgParser->parse($text, $this->mTitle, ParserOptions::newFromUser($wgUser));
 911                                 $wgOut->addParserOutputNoText( $parseout );
 912                         } else if ( $pcache ) {
 913                                 # Display content and save to parser cache
 914                                 $this->outputWikiText( $text );
 915                         } else {
 916                                 # Display content, don't attempt to save to parser cache
 917                                 # Don't show section-edit links on old revisions... this way lies madness.
 918                                 if( !$this->isCurrent() ) {
 919                                         $oldEditSectionSetting = $wgOut->parserOptions()->setEditSection( false );
 920                                 }
 921                                 # Display content and don't save to parser cache
 922                                 # With timing hack -- TS 2006-07-26
 923                                 $time = -wfTime();
 924                                 $this->outputWikiText( $text, false );
 925                                 $time += wfTime();
 926
 927                                 # Timing hack
 928                                 if ( $time > 3 ) {
 929                                         wfDebugLog( 'slow-parse', sprintf( "%-5.2f %s", $time,
 930                                                 $this->mTitle->getPrefixedDBkey()));
 931                                 }
 932
 933                                 if( !$this->isCurrent() ) {
 934                                         $wgOut->parserOptions()->setEditSection( $oldEditSectionSetting );
 935                                 }
 936                         }
 937                 }
 938                 /* title may have been set from the cache */
 939                 $t = $wgOut->getPageTitle();
 940                 if( empty( $t ) ) {
 941                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 942
 943                         # For the main page, overwrite the <title> element with the con-
 944                         # tents of 'pagetitle-view-mainpage' instead of the default (if
 945                         # that's not empty).
 946                         if( $this->mTitle->equals( Title::newMainPage() ) &&
 947                         wfMsgForContent( 'pagetitle-view-mainpage' ) !== '' ) {
 948                                 $wgOut->setHTMLTitle( wfMsgForContent( 'pagetitle-view-mainpage' ) );
 949                         }
 950                 }
 951
 952                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 953                 if( $ns == NS_USER_TALK && IP::isValid( $this->mTitle->getText() ) ) {
 954                         $wgOut->addWikiMsg('anontalkpagetext');
 955                 }
 956
 957                 # If we have been passed an &rcid= parameter, we want to give the user a
 958                 # chance to mark this new article as patrolled.
 959                 if( !is_null( $rcid ) && $rcid != 0 && $wgUser->isAllowed( 'patrol' ) && $this->mTitle->exists() ) {
 960                         $wgOut->addHTML(
 961                                 "<div class='patrollink'>" .
 962                                         wfMsgHtml( 'markaspatrolledlink',
 963                                         $sk->makeKnownLinkObj( $this->mTitle, wfMsgHtml('markaspatrolledtext'),
 964                                                 "action=markpatrolled&rcid=$rcid" )
 965                                         ) .
 966                                 '</div>'
 967                          );
 968                 }
 969
 970                 # Trackbacks
 971                 if ($wgUseTrackbacks)
 972                         $this->addTrackbacks();
 973
 974                 $this->viewUpdates();
 975                 wfProfileOut( __METHOD__ );
 976         }
 977
 978         /*
 979         * Should the parser cache be used?
 980         */
 981         protected function useParserCache( $oldid ) {
 982                 global $wgUser, $wgEnableParserCache;
 983
 984                 return $wgEnableParserCache
 985                         && intval( $wgUser->getOption( 'stubthreshold' ) ) == 0
 986                         && $this->exists()
 987                         && empty( $oldid )
 988                         && !$this->mTitle->isCssOrJsPage()
 989                         && !$this->mTitle->isCssJsSubpage();
 990         }
 991
 992         /**
 993          * View redirect
 994          * @param Title $target Title of destination to redirect
 995          * @param Bool  $appendSubtitle Object[optional]
 996          * @param Bool  $forceKnown Should the image be shown as a bluelink regardless of existence?
 997          */
 998         public function viewRedirect( $target, $appendSubtitle = true, $forceKnown = false ) {
 999                 global $wgParser, $wgOut, $wgContLang, $wgStylePath, $wgUser;
1000
1001                 # Display redirect
1002                 $imageDir = $wgContLang->isRTL() ? 'rtl' : 'ltr';
1003                 $imageUrl = $wgStylePath.'/common/images/redirect' . $imageDir . '.png';
1004
1005                 if( $appendSubtitle ) {
1006                         $wgOut->appendSubtitle( wfMsgHtml( 'redirectpagesub' ) );
1007                 }
1008                 $sk = $wgUser->getSkin();
1009                 if ( $forceKnown )
1010                         $link = $sk->makeKnownLinkObj( $target, htmlspecialchars( $target->getFullText() ) );
1011                 else
1012                         $link = $sk->makeLinkObj( $target, htmlspecialchars( $target->getFullText() ) );
1013
1014                 return '<img src="'.$imageUrl.'" alt="#REDIRECT " />' .
1015                         '<span class="redirectText">'.$link.'</span>';
1016
1017         }
1018
1019         function addTrackbacks() {
1020                 global $wgOut, $wgUser;
1021
1022                 $dbr = wfGetDB(DB_SLAVE);
1023                 $tbs = $dbr->select(
1024                                 /* FROM   */ 'trackbacks',
1025                                 /* SELECT */ array('tb_id', 'tb_title', 'tb_url', 'tb_ex', 'tb_name'),
1026                                 /* WHERE  */ array('tb_page' => $this->getID())
1027                 );
1028
1029                 if (!$dbr->numrows($tbs))
1030                         return;
1031
1032                 $tbtext = "";
1033                 while ($o = $dbr->fetchObject($tbs)) {
1034                         $rmvtxt = "";
1035                         if ($wgUser->isAllowed( 'trackback' )) {
1036                                 $delurl = $this->mTitle->getFullURL("action=deletetrackback&tbid="
1037                                                 . $o->tb_id . "&token=" . urlencode( $wgUser->editToken() ) );
1038                                 $rmvtxt = wfMsg( 'trackbackremove', htmlspecialchars( $delurl ) );
1039                         }
1040                         $tbtext .= "\n";
1041                         $tbtext .= wfMsg(strlen($o->tb_ex) ? 'trackbackexcerpt' : 'trackback',
1042                                         $o->tb_title,
1043                                         $o->tb_url,
1044                                         $o->tb_ex,
1045                                         $o->tb_name,
1046                                         $rmvtxt);
1047                 }
1048                 $wgOut->addWikiMsg( 'trackbackbox', $tbtext );
1049         }
1050
1051         function deletetrackback() {
1052                 global $wgUser, $wgRequest, $wgOut, $wgTitle;
1053
1054                 if (!$wgUser->matchEditToken($wgRequest->getVal('token'))) {
1055                         $wgOut->addWikiMsg( 'sessionfailure' );
1056                         return;
1057                 }
1058
1059                 $permission_errors = $this->mTitle->getUserPermissionsErrors( 'delete', $wgUser );
1060
1061                 if (count($permission_errors)>0)
1062                 {
1063                         $wgOut->showPermissionsErrorPage( $permission_errors );
1064                         return;
1065                 }
1066
1067                 $db = wfGetDB(DB_MASTER);
1068                 $db->delete('trackbacks', array('tb_id' => $wgRequest->getInt('tbid')));
1069                 $wgTitle->invalidateCache();
1070                 $wgOut->addWikiMsg('trackbackdeleteok');
1071         }
1072
1073         function render() {
1074                 global $wgOut;
1075
1076                 $wgOut->setArticleBodyOnly(true);
1077                 $this->view();
1078         }
1079
1080         /**
1081          * Handle action=purge
1082          */
1083         function purge() {
1084                 global $wgUser, $wgRequest, $wgOut;
1085
1086                 if ( $wgUser->isAllowed( 'purge' ) || $wgRequest->wasPosted() ) {
1087                         if( wfRunHooks( 'ArticlePurge', array( &$this ) ) ) {
1088                                 $this->doPurge();
1089                                 $this->view();
1090                         }
1091                 } else {
1092                         $action = htmlspecialchars( $wgRequest->getRequestURL() );
1093                         $button = wfMsgExt( 'confirm_purge_button', array('escapenoentities') );
1094                         $form = "<form method=\"post\" action=\"$action\">\n" .
1095                                         "<input type=\"submit\" name=\"submit\" value=\"$button\" />\n" .
1096                                         "</form>\n";
1097                         $top = wfMsgExt( 'confirm-purge-top', array('parse') );
1098                         $bottom = wfMsgExt( 'confirm-purge-bottom', array('parse') );
1099                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
1100                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
1101                         $wgOut->addHTML( $top . $form . $bottom );
1102                 }
1103         }
1104
1105         /**
1106          * Perform the actions of a page purging
1107          */
1108         function doPurge() {
1109                 global $wgUseSquid;
1110                 // Invalidate the cache
1111                 $this->mTitle->invalidateCache();
1112
1113                 if ( $wgUseSquid ) {
1114                         // Commit the transaction before the purge is sent
1115                         $dbw = wfGetDB( DB_MASTER );
1116                         $dbw->immediateCommit();
1117
1118                         // Send purge
1119                         $update = SquidUpdate::newSimplePurge( $this->mTitle );
1120                         $update->doUpdate();
1121                 }
1122                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1123                         global $wgMessageCache;
1124                         if ( $this->getID() == 0 ) {
1125                                 $text = false;
1126                         } else {
1127                                 $text = $this->getContent();
1128                         }
1129                         $wgMessageCache->replace( $this->mTitle->getDBkey(), $text );
1130                 }
1131         }
1132
1133         /**
1134          * Insert a new empty page record for this article.
1135          * This *must* be followed up by creating a revision
1136          * and running $this->updateToLatest( $rev_id );
1137          * or else the record will be left in a funky state.
1138          * Best if all done inside a transaction.
1139          *
1140          * @param Database $dbw
1141          * @return int     The newly created page_id key, or false if the title already existed
1142          * @private
1143          */
1144         function insertOn( $dbw ) {
1145                 wfProfileIn( __METHOD__ );
1146
1147                 $page_id = $dbw->nextSequenceValue( 'page_page_id_seq' );
1148                 $dbw->insert( 'page', array(
1149                         'page_id'           => $page_id,
1150                         'page_namespace'    => $this->mTitle->getNamespace(),
1151                         'page_title'        => $this->mTitle->getDBkey(),
1152                         'page_counter'      => 0,
1153                         'page_restrictions' => '',
1154                         'page_is_redirect'  => 0, # Will set this shortly...
1155                         'page_is_new'       => 1,
1156                         'page_random'       => wfRandom(),
1157                         'page_touched'      => $dbw->timestamp(),
1158                         'page_latest'       => 0, # Fill this in shortly...
1159                         'page_len'          => 0, # Fill this in shortly...
1160                 ), __METHOD__, 'IGNORE' );
1161
1162                 $affected = $dbw->affectedRows();
1163                 if ( $affected ) {
1164                         $newid = $dbw->insertId();
1165                         $this->mTitle->resetArticleId( $newid );
1166                 }
1167                 wfProfileOut( __METHOD__ );
1168                 return $affected ? $newid : false;
1169         }
1170
1171         /**
1172          * Update the page record to point to a newly saved revision.
1173          *
1174          * @param Database $dbw
1175          * @param Revision $revision For ID number, and text used to set
1176                                      length and redirect status fields
1177          * @param int $lastRevision If given, will not overwrite the page field
1178          *                          when different from the currently set value.
1179          *                          Giving 0 indicates the new page flag should
1180          *                          be set on.
1181          * @param bool $lastRevIsRedirect If given, will optimize adding and
1182          *                                                      removing rows in redirect table.
1183          * @return bool true on success, false on failure
1184          * @private
1185          */
1186         function updateRevisionOn( &$dbw, $revision, $lastRevision = null, $lastRevIsRedirect = null ) {
1187                 wfProfileIn( __METHOD__ );
1188
1189                 $text = $revision->getText();
1190                 $rt = Title::newFromRedirect( $text );
1191
1192                 $conditions = array( 'page_id' => $this->getId() );
1193                 if( !is_null( $lastRevision ) ) {
1194                         # An extra check against threads stepping on each other
1195                         $conditions['page_latest'] = $lastRevision;
1196                 }
1197
1198                 $dbw->update( 'page',
1199                         array( /* SET */
1200                                 'page_latest'      => $revision->getId(),
1201                                 'page_touched'     => $dbw->timestamp(),
1202                                 'page_is_new'      => ($lastRevision === 0) ? 1 : 0,
1203                                 'page_is_redirect' => $rt !== NULL ? 1 : 0,
1204                                 'page_len'         => strlen( $text ),
1205                         ),
1206                         $conditions,
1207                         __METHOD__ );
1208
1209                 $result = $dbw->affectedRows() != 0;
1210
1211                 if ($result) {
1212                         $this->updateRedirectOn( $dbw, $rt, $lastRevIsRedirect );
1213                 }
1214
1215                 wfProfileOut( __METHOD__ );
1216                 return $result;
1217         }
1218
1219         /**
1220          * Add row to the redirect table if this is a redirect, remove otherwise.
1221          *
1222          * @param Database $dbw
1223          * @param $redirectTitle a title object pointing to the redirect target,
1224          *                                                      or NULL if this is not a redirect
1225          * @param bool $lastRevIsRedirect If given, will optimize adding and
1226          *                                                      removing rows in redirect table.
1227          * @return bool true on success, false on failure
1228          * @private
1229          */
1230         function updateRedirectOn( &$dbw, $redirectTitle, $lastRevIsRedirect = null ) {
1231
1232                 // Always update redirects (target link might have changed)
1233                 // Update/Insert if we don't know if the last revision was a redirect or not
1234                 // Delete if changing from redirect to non-redirect
1235                 $isRedirect = !is_null($redirectTitle);
1236                 if ($isRedirect || is_null($lastRevIsRedirect) || $lastRevIsRedirect !== $isRedirect) {
1237
1238                         wfProfileIn( __METHOD__ );
1239
1240                         if ($isRedirect) {
1241
1242                                 // This title is a redirect, Add/Update row in the redirect table
1243                                 $set = array( /* SET */
1244                                         'rd_namespace' => $redirectTitle->getNamespace(),
1245                                         'rd_title'     => $redirectTitle->getDBkey(),
1246                                         'rd_from'      => $this->getId(),
1247                                 );
1248
1249                                 $dbw->replace( 'redirect', array( 'rd_from' ), $set, __METHOD__ );
1250                         } else {
1251                                 // This is not a redirect, remove row from redirect table
1252                                 $where = array( 'rd_from' => $this->getId() );
1253                                 $dbw->delete( 'redirect', $where, __METHOD__);
1254                         }
1255
1256                         if( $this->getTitle()->getNamespace() == NS_IMAGE )
1257                                 RepoGroup::singleton()->getLocalRepo()->invalidateImageRedirect( $this->getTitle() );
1258                         wfProfileOut( __METHOD__ );
1259                         return ( $dbw->affectedRows() != 0 );
1260                 }
1261
1262                 return true;
1263         }
1264
1265         /**
1266          * If the given revision is newer than the currently set page_latest,
1267          * update the page record. Otherwise, do nothing.
1268          *
1269          * @param Database $dbw
1270          * @param Revision $revision
1271          */
1272         function updateIfNewerOn( &$dbw, $revision ) {
1273                 wfProfileIn( __METHOD__ );
1274
1275                 $row = $dbw->selectRow(
1276                         array( 'revision', 'page' ),
1277                         array( 'rev_id', 'rev_timestamp', 'page_is_redirect' ),
1278                         array(
1279                                 'page_id' => $this->getId(),
1280                                 'page_latest=rev_id' ),
1281                         __METHOD__ );
1282                 if( $row ) {
1283                         if( wfTimestamp(TS_MW, $row->rev_timestamp) >= $revision->getTimestamp() ) {
1284                                 wfProfileOut( __METHOD__ );
1285                                 return false;
1286                         }
1287                         $prev = $row->rev_id;
1288                         $lastRevIsRedirect = (bool)$row->page_is_redirect;
1289                 } else {
1290                         # No or missing previous revision; mark the page as new
1291                         $prev = 0;
1292                         $lastRevIsRedirect = null;
1293                 }
1294
1295                 $ret = $this->updateRevisionOn( $dbw, $revision, $prev, $lastRevIsRedirect );
1296                 wfProfileOut( __METHOD__ );
1297                 return $ret;
1298         }
1299
1300         /**
1301          * @return string Complete article text, or null if error
1302          */
1303         function replaceSection($section, $text, $summary = '', $edittime = NULL) {
1304                 wfProfileIn( __METHOD__ );
1305
1306                 if( $section == '' ) {
1307                         // Whole-page edit; let the text through unmolested.
1308                 } else {
1309                         if( is_null( $edittime ) ) {
1310                                 $rev = Revision::newFromTitle( $this->mTitle );
1311                         } else {
1312                                 $dbw = wfGetDB( DB_MASTER );
1313                                 $rev = Revision::loadFromTimestamp( $dbw, $this->mTitle, $edittime );
1314                         }
1315                         if( is_null( $rev ) ) {
1316                                 wfDebug( "Article::replaceSection asked for bogus section (page: " .
1317                                         $this->getId() . "; section: $section; edittime: $edittime)\n" );
1318                                 return null;
1319                         }
1320                         $oldtext = $rev->getText();
1321
1322                         if( $section == 'new' ) {
1323                                 # Inserting a new section
1324                                 $subject = $summary ? wfMsgForContent('newsectionheaderdefaultlevel',$summary) . "\n\n" : '';
1325                                 $text = strlen( trim( $oldtext ) ) > 0
1326                                                 ? "{$oldtext}\n\n{$subject}{$text}"
1327                                                 : "{$subject}{$text}";
1328                         } else {
1329                                 # Replacing an existing section; roll out the big guns
1330                                 global $wgParser;
1331                                 $text = $wgParser->replaceSection( $oldtext, $section, $text );
1332                         }
1333
1334                 }
1335
1336                 wfProfileOut( __METHOD__ );
1337                 return $text;
1338         }
1339
1340         /**
1341          * @deprecated use Article::doEdit()
1342          */
1343         function insertNewArticle( $text, $summary, $isminor, $watchthis, $suppressRC=false, $comment=false, $bot=false ) {
1344                 $flags = EDIT_NEW | EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1345                         ( $isminor ? EDIT_MINOR : 0 ) |
1346                         ( $suppressRC ? EDIT_SUPPRESS_RC : 0 ) |
1347                         ( $bot ? EDIT_FORCE_BOT : 0 );
1348
1349                 # If this is a comment, add the summary as headline
1350                 if ( $comment && $summary != "" ) {
1351                         $text = wfMsgForContent('newsectionheaderdefaultlevel',$summary) . "\n\n".$text;
1352                 }
1353
1354                 $this->doEdit( $text, $summary, $flags );
1355
1356                 $dbw = wfGetDB( DB_MASTER );
1357                 if ($watchthis) {
1358                         if (!$this->mTitle->userIsWatching()) {
1359                                 $dbw->begin();
1360                                 $this->doWatch();
1361                                 $dbw->commit();
1362                         }
1363                 } else {
1364                         if ( $this->mTitle->userIsWatching() ) {
1365                                 $dbw->begin();
1366                                 $this->doUnwatch();
1367                                 $dbw->commit();
1368                         }
1369                 }
1370                 $this->doRedirect( $this->isRedirect( $text ) );
1371         }
1372
1373         /**
1374          * @deprecated use Article::doEdit()
1375          */
1376         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
1377                 $flags = EDIT_UPDATE | EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1378                         ( $minor ? EDIT_MINOR : 0 ) |
1379                         ( $forceBot ? EDIT_FORCE_BOT : 0 );
1380
1381                 $status = $this->doEdit( $text, $summary, $flags );
1382                 if ( !$status->isOK() ) {
1383                         return false;
1384                 }
1385
1386                 $dbw = wfGetDB( DB_MASTER );
1387                 if ($watchthis) {
1388                         if (!$this->mTitle->userIsWatching()) {
1389                                 $dbw->begin();
1390                                 $this->doWatch();
1391                                 $dbw->commit();
1392                         }
1393                 } else {
1394                         if ( $this->mTitle->userIsWatching() ) {
1395                                 $dbw->begin();
1396                                 $this->doUnwatch();
1397                                 $dbw->commit();
1398                         }
1399                 }
1400
1401                 $extraQuery = ''; // Give extensions a chance to modify URL query on update
1402                 wfRunHooks( 'ArticleUpdateBeforeRedirect', array( $this, &$sectionanchor, &$extraQuery ) );
1403
1404                 $this->doRedirect( $this->isRedirect( $text ), $sectionanchor, $extraQuery );
1405                 return true;
1406         }
1407
1408         /**
1409          * Article::doEdit()
1410          *
1411          * Change an existing article or create a new article. Updates RC and all necessary caches,
1412          * optionally via the deferred update array.
1413          *
1414          * $wgUser must be set before calling this function.
1415          *
1416          * @param string $text New text
1417          * @param string $summary Edit summary
1418          * @param integer $flags bitfield:
1419          *      EDIT_NEW
1420          *          Article is known or assumed to be non-existent, create a new one
1421          *      EDIT_UPDATE
1422          *          Article is known or assumed to be pre-existing, update it
1423          *      EDIT_MINOR
1424          *          Mark this edit minor, if the user is allowed to do so
1425          *      EDIT_SUPPRESS_RC
1426          *          Do not log the change in recentchanges
1427          *      EDIT_FORCE_BOT
1428          *          Mark the edit a "bot" edit regardless of user rights
1429          *      EDIT_DEFER_UPDATES
1430          *          Defer some of the updates until the end of index.php
1431          *      EDIT_AUTOSUMMARY
1432          *          Fill in blank summaries with generated text where possible
1433          *
1434          * If neither EDIT_NEW nor EDIT_UPDATE is specified, the status of the article will be detected.
1435          * If EDIT_UPDATE is specified and the article doesn't exist, the function will an
1436          * edit-gone-missing error. If EDIT_NEW is specified and the article does exist, an
1437          * edit-already-exists error will be returned. These two conditions are also possible with
1438          * auto-detection due to MediaWiki's performance-optimised locking strategy.
1439          *
1440          * @param $baseRevId, the revision ID this edit was based off, if any
1441          *
1442          * @return Status object. Possible errors:
1443          *     edit-hook-aborted:       The ArticleSave hook aborted the edit but didn't set the fatal flag of $status
1444          *     edit-gone-missing:       In update mode, but the article didn't exist
1445          *     edit-conflict:           In update mode, the article changed unexpectedly
1446          *     edit-no-change:          Warning that the text was the same as before
1447          *     edit-already-exists:     In creation mode, but the article already exists
1448          *
1449          *  Extensions may define additional errors.
1450          *
1451          *  $return->value will contain an associative array with members as follows:
1452          *     new:                     Boolean indicating if the function attempted to create a new article
1453          *     revision:                The revision object for the inserted revision, or null
1454          *
1455          *  Compatibility note: this function previously returned a boolean value indicating success/failure
1456          */
1457         function doEdit( $text, $summary, $flags = 0, $baseRevId = false, $user = null ) {
1458                 global $wgUser, $wgDBtransactions, $wgUseAutomaticEditSummaries;
1459
1460                 # Low-level sanity check
1461                 if( $this->mTitle->getText() == '' ) {
1462                         throw new MWException( 'Something is trying to edit an article with an empty title' );
1463                 }
1464
1465                 wfProfileIn( __METHOD__ );
1466
1467                 if ($user == null) {
1468                         $user = $wgUser;
1469                 }
1470                 $status = Status::newGood( array() );
1471
1472                 # Load $this->mTitle->getArticleID() and $this->mLatest if it's not already
1473                 $this->loadPageData();
1474
1475                 if ( !($flags & EDIT_NEW) && !($flags & EDIT_UPDATE) ) {
1476                         $aid = $this->mTitle->getArticleID();
1477                         if ( $aid ) {
1478                                 $flags |= EDIT_UPDATE;
1479                         } else {
1480                                 $flags |= EDIT_NEW;
1481                         }
1482                 }
1483
1484                 if( !wfRunHooks( 'ArticleSave', array( &$this, &$user, &$text,
1485                         &$summary, $flags & EDIT_MINOR,
1486                         null, null, &$flags, &$status ) ) )
1487                 {
1488                         wfDebug( __METHOD__ . ": ArticleSave hook aborted save!\n" );
1489                         wfProfileOut( __METHOD__ );
1490                         if ( $status->isOK() ) {
1491                                 $status->fatal( 'edit-hook-aborted');
1492                         }
1493                         return $status;
1494                 }
1495
1496                 # Silently ignore EDIT_MINOR if not allowed
1497                 $isminor = ( $flags & EDIT_MINOR ) && $user->isAllowed('minoredit');
1498                 $bot = $flags & EDIT_FORCE_BOT;
1499
1500                 $oldtext = $this->getContent();
1501                 $oldsize = strlen( $oldtext );
1502
1503                 # Provide autosummaries if one is not provided and autosummaries are enabled.
1504                 if( $wgUseAutomaticEditSummaries && $flags & EDIT_AUTOSUMMARY && $summary == '' ) {
1505                         $summary = $this->getAutosummary( $oldtext, $text, $flags );
1506                 }
1507
1508                 $editInfo = $this->prepareTextForEdit( $text );
1509                 $text = $editInfo->pst;
1510                 $newsize = strlen( $text );
1511
1512                 $dbw = wfGetDB( DB_MASTER );
1513                 $now = wfTimestampNow();
1514
1515                 if ( $flags & EDIT_UPDATE ) {
1516                         # Update article, but only if changed.
1517                         $status->value['new'] = false;
1518
1519                         # Make sure the revision is either completely inserted or not inserted at all
1520                         if( !$wgDBtransactions ) {
1521                                 $userAbort = ignore_user_abort( true );
1522                         }
1523
1524                         $revisionId = 0;
1525
1526                         $changed = ( strcmp( $text, $oldtext ) != 0 );
1527
1528                         if ( $changed ) {
1529                                 $this->mGoodAdjustment = (int)$this->isCountable( $text )
1530                                   - (int)$this->isCountable( $oldtext );
1531                                 $this->mTotalAdjustment = 0;
1532
1533                                 if ( !$this->mLatest ) {
1534                                         # Article gone missing
1535                                         wfDebug( __METHOD__.": EDIT_UPDATE specified but article doesn't exist\n" );
1536                                         $status->fatal( 'edit-gone-missing' );
1537                                         wfProfileOut( __METHOD__ );
1538                                         return $status;
1539                                 }
1540
1541                                 $revision = new Revision( array(
1542                                         'page'       => $this->getId(),
1543                                         'comment'    => $summary,
1544                                         'minor_edit' => $isminor,
1545                                         'text'       => $text,
1546                                         'parent_id'  => $this->mLatest,
1547                                         'user'       => $user->getId(),
1548                                         'user_text'  => $user->getName(),
1549                                         ) );
1550
1551                                 $dbw->begin();
1552                                 $revisionId = $revision->insertOn( $dbw );
1553
1554                                 # Update page
1555                                 #
1556                                 # Note that we use $this->mLatest instead of fetching a value from the master DB
1557                                 # during the course of this function. This makes sure that EditPage can detect
1558                                 # edit conflicts reliably, either by $ok here, or by $article->getTimestamp()
1559                                 # before this function is called. A previous function used a separate query, this
1560                                 # creates a window where concurrent edits can cause an ignored edit conflict.
1561                                 $ok = $this->updateRevisionOn( $dbw, $revision, $this->mLatest );
1562
1563                                 if( !$ok ) {
1564                                         /* Belated edit conflict! Run away!! */
1565                                         $status->fatal( 'edit-conflict' );
1566                                         # Delete the invalid revision if the DB is not transactional
1567                                         if ( !$wgDBtransactions ) {
1568                                                 $dbw->delete( 'revision', array( 'rev_id' => $revisionId ), __METHOD__ );
1569                                         }
1570                                         $revisionId = 0;
1571                                         $dbw->rollback();
1572                                 } else {
1573                                         wfRunHooks( 'NewRevisionFromEditComplete', array( $this, $revision, $baseRevId ) );
1574
1575                                         # Update recentchanges
1576                                         if( !( $flags & EDIT_SUPPRESS_RC ) ) {
1577                                                 $rc = RecentChange::notifyEdit( $now, $this->mTitle, $isminor, $user, $summary,
1578                                                         $this->mLatest, $this->getTimestamp(), $bot, '', $oldsize, $newsize,
1579                                                         $revisionId );
1580
1581                                                 # Mark as patrolled if the user can do so
1582                                                 if( $GLOBALS['wgUseRCPatrol'] && $user->isAllowed( 'autopatrol' ) ) {
1583                                                         RecentChange::markPatrolled( $rc, true );
1584                                                 }
1585                                         }
1586                                         $user->incEditCount();
1587                                         $dbw->commit();
1588                                 }
1589                         } else {
1590                                 $status->warning( 'edit-no-change' );
1591                                 $revision = null;
1592                                 // Keep the same revision ID, but do some updates on it
1593                                 $revisionId = $this->getRevIdFetched();
1594                                 // Update page_touched, this is usually implicit in the page update
1595                                 // Other cache updates are done in onArticleEdit()
1596                                 $this->mTitle->invalidateCache();
1597                         }
1598
1599                         if( !$wgDBtransactions ) {
1600                                 ignore_user_abort( $userAbort );
1601                         }
1602                         // Now that ignore_user_abort is restored, we can respond to fatal errors
1603                         if ( !$status->isOK() ) {
1604                                 wfProfileOut( __METHOD__ );
1605                                 return $status;
1606                         }
1607
1608                         # Invalidate cache of this article and all pages using this article
1609                         # as a template. Partly deferred. Leave templatelinks for editUpdates().
1610                         Article::onArticleEdit( $this->mTitle, 'skiptransclusions' );
1611                         # Update links tables, site stats, etc.
1612                         $this->editUpdates( $text, $summary, $isminor, $now, $revisionId, $changed );
1613                 } else {
1614                         # Create new article
1615                         $status->value['new'] = true;
1616
1617                         # Set statistics members
1618                         # We work out if it's countable after PST to avoid counter drift
1619                         # when articles are created with {{subst:}}
1620                         $this->mGoodAdjustment = (int)$this->isCountable( $text );
1621                         $this->mTotalAdjustment = 1;
1622
1623                         $dbw->begin();
1624
1625                         # Add the page record; stake our claim on this title!
1626                         # This will return false if the article already exists
1627                         $newid = $this->insertOn( $dbw );
1628
1629                         if ( $newid === false ) {
1630                                 $dbw->rollback();
1631                                 $status->fatal( 'edit-already-exists' );
1632                                 wfProfileOut( __METHOD__ );
1633                                 return $status;
1634                         }
1635
1636                         # Save the revision text...
1637                         $revision = new Revision( array(
1638                                 'page'       => $newid,
1639                                 'comment'    => $summary,
1640                                 'minor_edit' => $isminor,
1641                                 'text'       => $text,
1642                                 'user'       => $user->getId(),
1643                                 'user_text'  => $user->getName(),
1644                                 ) );
1645                         $revisionId = $revision->insertOn( $dbw );
1646
1647                         $this->mTitle->resetArticleID( $newid );
1648
1649                         # Update the page record with revision data
1650                         $this->updateRevisionOn( $dbw, $revision, 0 );
1651
1652                         wfRunHooks( 'NewRevisionFromEditComplete', array($this, $revision, false) );
1653
1654                         if( !( $flags & EDIT_SUPPRESS_RC ) ) {
1655                                 $rc = RecentChange::notifyNew( $now, $this->mTitle, $isminor, $user, $summary, $bot,
1656                                   '', strlen( $text ), $revisionId );
1657                                 # Mark as patrolled if the user can
1658                                 if( ($GLOBALS['wgUseRCPatrol'] || $GLOBALS['wgUseNPPatrol']) && $user->isAllowed( 'autopatrol' ) ) {
1659                                         RecentChange::markPatrolled( $rc, true );
1660                                 }
1661                         }
1662                         $user->incEditCount();
1663                         $dbw->commit();
1664
1665                         # Update links, etc.
1666                         $this->editUpdates( $text, $summary, $isminor, $now, $revisionId, true );
1667
1668                         # Clear caches
1669                         Article::onArticleCreate( $this->mTitle );
1670
1671                         wfRunHooks( 'ArticleInsertComplete', array( &$this, &$user, $text, $summary,
1672                                 $flags & EDIT_MINOR, null, null, &$flags, $revision ) );
1673                 }
1674
1675                 # Do updates right now unless deferral was requested
1676                 if ( !( $flags & EDIT_DEFER_UPDATES ) ) {
1677                         wfDoUpdates();
1678                 }
1679
1680                 // Return the new revision (or null) to the caller
1681                 $status->value['revision'] = $revision;
1682
1683                 wfRunHooks( 'ArticleSaveComplete', array( &$this, &$user, $text, $summary,
1684                         $flags & EDIT_MINOR, null, null, &$flags, $revision, &$status ) );
1685
1686                 wfProfileOut( __METHOD__ );
1687                 return $status;
1688         }
1689
1690         /**
1691          * @deprecated wrapper for doRedirect
1692          */
1693         function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid ) {
1694                 $this->doRedirect( $this->isRedirect( $text ), $sectionanchor );
1695         }
1696
1697         /**
1698          * Output a redirect back to the article.
1699          * This is typically used after an edit.
1700          *
1701          * @param boolean $noRedir Add redirect=no
1702          * @param string $sectionAnchor section to redirect to, including "#"
1703          * @param string $extraQuery, extra query params
1704          */
1705         function doRedirect( $noRedir = false, $sectionAnchor = '', $extraQuery = '' ) {
1706                 global $wgOut;
1707                 if ( $noRedir ) {
1708                         $query = 'redirect=no';
1709                         if( $extraQuery )
1710                                 $query .= "&$query";
1711                 } else {
1712                         $query = $extraQuery;
1713                 }
1714                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $sectionAnchor );
1715         }
1716
1717         /**
1718          * Mark this particular edit/page as patrolled
1719          */
1720         function markpatrolled() {
1721                 global $wgOut, $wgRequest, $wgUseRCPatrol, $wgUseNPPatrol, $wgUser;
1722                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1723
1724                 # If we haven't been given an rc_id value, we can't do anything
1725                 $rcid = (int) $wgRequest->getVal('rcid');
1726                 $rc = RecentChange::newFromId($rcid);
1727                 if ( is_null($rc) ) {
1728                         $wgOut->showErrorPage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1729                         return;
1730                 }
1731
1732                 #It would be nice to see where the user had actually come from, but for now just guess
1733                 $returnto = $rc->getAttribute( 'rc_type' ) == RC_NEW ? 'Newpages' : 'Recentchanges';
1734                 $return = Title::makeTitle( NS_SPECIAL, $returnto );
1735
1736                 $dbw = wfGetDB( DB_MASTER );
1737                 $errors = $rc->doMarkPatrolled();
1738
1739                 if ( in_array(array('rcpatroldisabled'), $errors) ) {
1740                         $wgOut->showErrorPage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1741                         return;
1742                 }
1743
1744                 if ( in_array(array('hookaborted'), $errors) ) {
1745                         // The hook itself has handled any output
1746                         return;
1747                 }
1748
1749                 if ( in_array(array('markedaspatrollederror-noautopatrol'), $errors) ) {
1750                         $wgOut->setPageTitle( wfMsg( 'markedaspatrollederror' ) );
1751                         $wgOut->addWikiMsg( 'markedaspatrollederror-noautopatrol' );
1752                         $wgOut->returnToMain( false, $return );
1753                         return;
1754                 }
1755
1756                 if ( !empty($errors) ) {
1757                         $wgOut->showPermissionsErrorPage( $errors );
1758                         return;
1759                 }
1760
1761                 # Inform the user
1762                 $wgOut->setPageTitle( wfMsg( 'markedaspatrolled' ) );
1763                 $wgOut->addWikiMsg( 'markedaspatrolledtext' );
1764                 $wgOut->returnToMain( false, $return );
1765         }
1766
1767         /**
1768          * User-interface handler for the "watch" action
1769          */
1770
1771         function watch() {
1772
1773                 global $wgUser, $wgOut;
1774
1775                 if ( $wgUser->isAnon() ) {
1776                         $wgOut->showErrorPage( 'watchnologin', 'watchnologintext' );
1777                         return;
1778                 }
1779                 if ( wfReadOnly() ) {
1780                         $wgOut->readOnlyPage();
1781                         return;
1782                 }
1783
1784                 if( $this->doWatch() ) {
1785                         $wgOut->setPagetitle( wfMsg( 'addedwatch' ) );
1786                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
1787
1788                         $wgOut->addWikiMsg( 'addedwatchtext', $this->mTitle->getPrefixedText() );
1789                 }
1790
1791                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1792         }
1793
1794         /**
1795          * Add this page to $wgUser's watchlist
1796          * @return bool true on successful watch operation
1797          */
1798         function doWatch() {
1799                 global $wgUser;
1800                 if( $wgUser->isAnon() ) {
1801                         return false;
1802                 }
1803
1804                 if (wfRunHooks('WatchArticle', array(&$wgUser, &$this))) {
1805                         $wgUser->addWatch( $this->mTitle );
1806
1807                         return wfRunHooks('WatchArticleComplete', array(&$wgUser, &$this));
1808                 }
1809
1810                 return false;
1811         }
1812
1813         /**
1814          * User interface handler for the "unwatch" action.
1815          */
1816         function unwatch() {
1817
1818                 global $wgUser, $wgOut;
1819
1820                 if ( $wgUser->isAnon() ) {
1821                         $wgOut->showErrorPage( 'watchnologin', 'watchnologintext' );
1822                         return;
1823                 }
1824                 if ( wfReadOnly() ) {
1825                         $wgOut->readOnlyPage();
1826                         return;
1827                 }
1828
1829                 if( $this->doUnwatch() ) {
1830                         $wgOut->setPagetitle( wfMsg( 'removedwatch' ) );
1831                         $wgOut->setRobotPolicy( 'noindex,nofollow' );
1832
1833                         $wgOut->addWikiMsg( 'removedwatchtext', $this->mTitle->getPrefixedText() );
1834                 }
1835
1836                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1837         }
1838
1839         /**
1840          * Stop watching a page
1841          * @return bool true on successful unwatch
1842          */
1843         function doUnwatch() {
1844                 global $wgUser;
1845                 if( $wgUser->isAnon() ) {
1846                         return false;
1847                 }
1848
1849                 if (wfRunHooks('UnwatchArticle', array(&$wgUser, &$this))) {
1850                         $wgUser->removeWatch( $this->mTitle );
1851
1852                         return wfRunHooks('UnwatchArticleComplete', array(&$wgUser, &$this));
1853                 }
1854
1855                 return false;
1856         }
1857
1858         /**
1859          * action=protect handler
1860          */
1861         function protect() {
1862                 $form = new ProtectionForm( $this );
1863                 $form->execute();
1864         }
1865
1866         /**
1867          * action=unprotect handler (alias)
1868          */
1869         function unprotect() {
1870                 $this->protect();
1871         }
1872
1873         /**
1874          * Update the article's restriction field, and leave a log entry.
1875          *
1876          * @param array $limit set of restriction keys
1877          * @param string $reason
1878          * @return bool true on success
1879          */
1880         function updateRestrictions( $limit = array(), $reason = '', $cascade = 0, $expiry = array() ) {
1881                 global $wgUser, $wgRestrictionTypes, $wgContLang;
1882
1883                 $id = $this->mTitle->getArticleID();
1884                 if( array() != $this->mTitle->getUserPermissionsErrors( 'protect', $wgUser ) || wfReadOnly() || $id == 0 ) {
1885                         return false;
1886                 }
1887
1888                 if( !$cascade ) {
1889                         $cascade = false;
1890                 }
1891
1892                 // Take this opportunity to purge out expired restrictions
1893                 Title::purgeExpiredRestrictions();
1894
1895                 # FIXME: Same limitations as described in ProtectionForm.php (line 37);
1896                 # we expect a single selection, but the schema allows otherwise.
1897                 $current = array();
1898                 $updated = Article::flattenRestrictions( $limit );
1899                 $changed = false;
1900                 foreach( $wgRestrictionTypes as $action ) {
1901                         $current[$action] = implode( '', $this->mTitle->getRestrictions( $action ) );
1902                         $changed = ($changed || ($this->mTitle->mRestrictionsExpiry[$action] != $expiry[$action]) );
1903                 }
1904
1905                 $current = Article::flattenRestrictions( $current );
1906
1907                 $changed = ($changed || ( $current != $updated ) );
1908                 $changed = $changed || ($updated && $this->mTitle->areRestrictionsCascading() != $cascade);
1909                 $protect = ( $updated != '' );
1910
1911                 # If nothing's changed, do nothing
1912                 if( $changed ) {
1913                         if( wfRunHooks( 'ArticleProtect', array( &$this, &$wgUser, $limit, $reason ) ) ) {
1914
1915                                 $dbw = wfGetDB( DB_MASTER );
1916
1917                                 # Prepare a null revision to be added to the history
1918                                 $modified = $current != '' && $protect;
1919                                 if( $protect ) {
1920                                         $comment_type = $modified ? 'modifiedarticleprotection' : 'protectedarticle';
1921                                 } else {
1922                                         $comment_type = 'unprotectedarticle';
1923                                 }
1924                                 $comment = $wgContLang->ucfirst( wfMsgForContent( $comment_type, $this->mTitle->getPrefixedText() ) );
1925
1926                                 # Only restrictions with the 'protect' right can cascade...
1927                                 # Otherwise, people who cannot normally protect can "protect" pages via transclusion
1928                                 foreach( $limit as $action => $restriction ) {
1929                                         # FIXME: can $restriction be an array or what? (same as fixme above)
1930                                         if( $restriction != 'protect' && $restriction != 'sysop' ) {
1931                                                 $cascade = false;
1932                                                 break;
1933                                         }
1934                                 }
1935                                 $cascade_description = '';
1936                                 if( $cascade ) {
1937                                         $cascade_description = ' ['.wfMsgForContent('protect-summary-cascade').']';
1938                                 }
1939
1940                                 if( $reason )
1941                                         $comment .= ": $reason";
1942
1943                                 $editComment = $comment;
1944                                 $encodedExpiry = array();
1945                                 $protect_description = '';
1946                                 foreach( $limit as $action => $restrictions  ) {
1947                                         $encodedExpiry[$action] = Block::encodeExpiry($expiry[$action], $dbw );
1948                                         if( $restrictions != '' ) {
1949                                                 $protect_description .= "[$action=$restrictions] (";
1950                                                 if( $encodedExpiry[$action] != 'infinity' ) {
1951                                                         $protect_description .= wfMsgForContent( 'protect-expiring',
1952                                                                 $wgContLang->timeanddate( $expiry[$action], false, false ) );
1953                                                 } else {
1954                                                         $protect_description .= wfMsgForContent( 'protect-expiry-indefinite' );
1955                                                 }
1956                                                 $protect_description .= ') ';
1957                                         }
1958                                 }
1959                                 $protect_description = trim($protect_description);
1960
1961                                 if( $protect_description && $protect )
1962                                         $editComment .= " ($protect_description)";
1963                                 if( $cascade )
1964                                         $editComment .= "$cascade_description";
1965                                 # Update restrictions table
1966                                 foreach( $limit as $action => $restrictions ) {
1967                                         if ($restrictions != '' ) {
1968                                                 $dbw->replace( 'page_restrictions', array(array('pr_page', 'pr_type')),
1969                                                         array( 'pr_page' => $id,
1970                                                                 'pr_type' => $action,
1971                                                                 'pr_level' => $restrictions,
1972                                                                 'pr_cascade' => ($cascade && $action == 'edit') ? 1 : 0,
1973                                                                 'pr_expiry' => $encodedExpiry[$action] ), __METHOD__  );
1974                                         } else {
1975                                                 $dbw->delete( 'page_restrictions', array( 'pr_page' => $id,
1976                                                         'pr_type' => $action ), __METHOD__ );
1977                                         }
1978                                 }
1979
1980                                 # Insert a null revision
1981                                 $nullRevision = Revision::newNullRevision( $dbw, $id, $editComment, true );
1982                                 $nullRevId = $nullRevision->insertOn( $dbw );
1983
1984                                 $latest = $this->getLatest();
1985                                 # Update page record
1986                                 $dbw->update( 'page',
1987                                         array( /* SET */
1988                                                 'page_touched' => $dbw->timestamp(),
1989                                                 'page_restrictions' => '',
1990                                                 'page_latest' => $nullRevId
1991                                         ), array( /* WHERE */
1992                                                 'page_id' => $id
1993                                         ), 'Article::protect'
1994                                 );
1995
1996                                 wfRunHooks( 'NewRevisionFromEditComplete', array($this, $nullRevision, $latest) );
1997                                 wfRunHooks( 'ArticleProtectComplete', array( &$this, &$wgUser, $limit, $reason ) );
1998
1999                                 # Update the protection log
2000                                 $log = new LogPage( 'protect' );
2001                                 if( $protect ) {
2002                                         $params = array($protect_description,$cascade ? 'cascade' : '');
2003                                         $log->addEntry( $modified ? 'modify' : 'protect', $this->mTitle, trim( $reason), $params );
2004                                 } else {
2005                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
2006                                 }
2007
2008                         } # End hook
2009                 } # End "changed" check
2010
2011                 return true;
2012         }
2013
2014         /**
2015          * Take an array of page restrictions and flatten it to a string
2016          * suitable for insertion into the page_restrictions field.
2017          * @param array $limit
2018          * @return string
2019          * @private
2020          */
2021         function flattenRestrictions( $limit ) {
2022                 if( !is_array( $limit ) ) {
2023                         throw new MWException( 'Article::flattenRestrictions given non-array restriction set' );
2024                 }
2025                 $bits = array();
2026                 ksort( $limit );
2027                 foreach( $limit as $action => $restrictions ) {
2028                         if( $restrictions != '' ) {
2029                                 $bits[] = "$action=$restrictions";
2030                         }
2031                 }
2032                 return implode( ':', $bits );
2033         }
2034
2035         /**
2036          * Auto-generates a deletion reason
2037          * @param bool &$hasHistory Whether the page has a history
2038          */
2039         public function generateReason( &$hasHistory ) {
2040                 global $wgContLang;
2041                 $dbw = wfGetDB( DB_MASTER );
2042                 // Get the last revision
2043                 $rev = Revision::newFromTitle( $this->mTitle );
2044                 if( is_null( $rev ) )
2045                         return false;
2046
2047                 // Get the article's contents
2048                 $contents = $rev->getText();
2049                 $blank = false;
2050                 // If the page is blank, use the text from the previous revision,
2051                 // which can only be blank if there's a move/import/protect dummy revision involved
2052                 if( $contents == '' ) {
2053                         $prev = $rev->getPrevious();
2054                         if( $prev )     {
2055                                 $contents = $prev->getText();
2056                                 $blank = true;
2057                         }
2058                 }
2059
2060                 // Find out if there was only one contributor
2061                 // Only scan the last 20 revisions
2062                 $limit = 20;
2063                 $res = $dbw->select( 'revision', 'rev_user_text',
2064                         array( 'rev_page' => $this->getID() ), __METHOD__,
2065                         array( 'LIMIT' => $limit )
2066                 );
2067                 if( $res === false )
2068                         // This page has no revisions, which is very weird
2069                         return false;
2070                 if( $res->numRows() > 1 )
2071                                 $hasHistory = true;
2072                 else
2073                                 $hasHistory = false;
2074                 $row = $dbw->fetchObject( $res );
2075                 $onlyAuthor = $row->rev_user_text;
2076                 // Try to find a second contributor
2077                 foreach( $res as $row ) {
2078                         if( $row->rev_user_text != $onlyAuthor ) {
2079                                 $onlyAuthor = false;
2080                                 break;
2081                         }
2082                 }
2083                 $dbw->freeResult( $res );
2084
2085                 // Generate the summary with a '$1' placeholder
2086                 if( $blank ) {
2087                         // The current revision is blank and the one before is also
2088                         // blank. It's just not our lucky day
2089                         $reason = wfMsgForContent( 'exbeforeblank', '$1' );
2090                 } else {
2091                         if( $onlyAuthor )
2092                                 $reason = wfMsgForContent( 'excontentauthor', '$1', $onlyAuthor );
2093                         else
2094                                 $reason = wfMsgForContent( 'excontent', '$1' );
2095                 }
2096
2097                 // Replace newlines with spaces to prevent uglyness
2098                 $contents = preg_replace( "/[\n\r]/", ' ', $contents );
2099                 // Calculate the maximum amount of chars to get
2100                 // Max content length = max comment length - length of the comment (excl. $1) - '...'
2101                 $maxLength = 255 - (strlen( $reason ) - 2) - 3;
2102                 $contents = $wgContLang->truncate( $contents, $maxLength, '...' );
2103                 // Remove possible unfinished links
2104                 $contents = preg_replace( '/\[\[([^\]]*)\]?$/', '$1', $contents );
2105                 // Now replace the '$1' placeholder
2106                 $reason = str_replace( '$1', $contents, $reason );
2107                 return $reason;
2108         }
2109
2110
2111         /*
2112          * UI entry point for page deletion
2113          */
2114         function delete() {
2115                 global $wgUser, $wgOut, $wgRequest;
2116
2117                 $confirm = $wgRequest->wasPosted() &&
2118                                 $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
2119
2120                 $this->DeleteReasonList = $wgRequest->getText( 'wpDeleteReasonList', 'other' );
2121                 $this->DeleteReason = $wgRequest->getText( 'wpReason' );
2122
2123                 $reason = $this->DeleteReasonList;
2124
2125                 if ( $reason != 'other' && $this->DeleteReason != '') {
2126                         // Entry from drop down menu + additional comment
2127                         $reason .= ': ' . $this->DeleteReason;
2128                 } elseif ( $reason == 'other' ) {
2129                         $reason = $this->DeleteReason;
2130                 }
2131                 # Flag to hide all contents of the archived revisions
2132                 $suppress = $wgRequest->getVal( 'wpSuppress' ) && $wgUser->isAllowed('suppressrevision');
2133
2134                 # This code desperately needs to be totally rewritten
2135
2136                 # Read-only check...
2137                 if ( wfReadOnly() ) {
2138                         $wgOut->readOnlyPage();
2139                         return;
2140                 }
2141
2142                 # Check permissions
2143                 $permission_errors = $this->mTitle->getUserPermissionsErrors( 'delete', $wgUser );
2144
2145                 if (count($permission_errors)>0) {
2146                         $wgOut->showPermissionsErrorPage( $permission_errors );
2147                         return;
2148                 }
2149
2150                 $wgOut->setPagetitle( wfMsg( 'delete-confirm', $this->mTitle->getPrefixedText() ) );
2151
2152                 # Better double-check that it hasn't been deleted yet!
2153                 $dbw = wfGetDB( DB_MASTER );
2154                 $conds = $this->mTitle->pageCond();
2155                 $latest = $dbw->selectField( 'page', 'page_latest', $conds, __METHOD__ );
2156                 if ( $latest === false ) {
2157                         $wgOut->showFatalError( wfMsg( 'cannotdelete' ) );
2158                         return;
2159                 }
2160
2161                 # Hack for big sites
2162                 $bigHistory = $this->isBigDeletion();
2163                 if( $bigHistory && !$this->mTitle->userCan( 'bigdelete' ) ) {
2164                         global $wgLang, $wgDeleteRevisionsLimit;
2165                         $wgOut->wrapWikiMsg( "<div class='error'>\n$1</div>\n",
2166                                 array( 'delete-toobig', $wgLang->formatNum( $wgDeleteRevisionsLimit ) ) );
2167                         return;
2168                 }
2169
2170                 if( $confirm ) {
2171                         $this->doDelete( $reason, $suppress );
2172                         if( $wgRequest->getCheck( 'wpWatch' ) ) {
2173                                 $this->doWatch();
2174                         } elseif( $this->mTitle->userIsWatching() ) {
2175                                 $this->doUnwatch();
2176                         }
2177                         return;
2178                 }
2179
2180                 // Generate deletion reason
2181                 $hasHistory = false;
2182                 if ( !$reason ) $reason = $this->generateReason($hasHistory);
2183
2184                 // If the page has a history, insert a warning
2185                 if( $hasHistory && !$confirm ) {
2186                         $skin=$wgUser->getSkin();
2187                         $wgOut->addHTML( '<strong>' . wfMsg( 'historywarning' ) . ' ' . $skin->historyLink() . '</strong>' );
2188                         if( $bigHistory ) {
2189                                 global $wgLang, $wgDeleteRevisionsLimit;
2190                                 $wgOut->wrapWikiMsg( "<div class='error'>\n$1</div>\n",
2191                                         array( 'delete-warning-toobig', $wgLang->formatNum( $wgDeleteRevisionsLimit ) ) );
2192                         }
2193                 }
2194
2195                 return $this->confirmDelete( $reason );
2196         }
2197
2198         /**
2199          * @return bool whether or not the page surpasses $wgDeleteRevisionsLimit revisions
2200          */
2201         function isBigDeletion() {
2202                 global $wgDeleteRevisionsLimit;
2203                 if( $wgDeleteRevisionsLimit ) {
2204                         $revCount = $this->estimateRevisionCount();
2205                         return $revCount > $wgDeleteRevisionsLimit;
2206                 }
2207                 return false;
2208         }
2209
2210         /**
2211          * @return int approximate revision count
2212          */
2213         function estimateRevisionCount() {
2214                 $dbr = wfGetDB( DB_SLAVE );
2215                 // For an exact count...
2216                 //return $dbr->selectField( 'revision', 'COUNT(*)',
2217                 //      array( 'rev_page' => $this->getId() ), __METHOD__ );
2218                 return $dbr->estimateRowCount( 'revision', '*',
2219                         array( 'rev_page' => $this->getId() ), __METHOD__ );
2220         }
2221
2222         /**
2223          * Get the last N authors
2224          * @param int $num Number of revisions to get
2225          * @param string $revLatest The latest rev_id, selected from the master (optional)
2226          * @return array Array of authors, duplicates not removed
2227          */
2228         function getLastNAuthors( $num, $revLatest = 0 ) {
2229                 wfProfileIn( __METHOD__ );
2230
2231                 // First try the slave
2232                 // If that doesn't have the latest revision, try the master
2233                 $continue = 2;
2234                 $db = wfGetDB( DB_SLAVE );
2235                 do {
2236                         $res = $db->select( array( 'page', 'revision' ),
2237                                 array( 'rev_id', 'rev_user_text' ),
2238                                 array(
2239                                         'page_namespace' => $this->mTitle->getNamespace(),
2240                                         'page_title' => $this->mTitle->getDBkey(),
2241                                         'rev_page = page_id'
2242                                 ), __METHOD__, $this->getSelectOptions( array(
2243                                         'ORDER BY' => 'rev_timestamp DESC',
2244                                         'LIMIT' => $num
2245                                 ) )
2246                         );
2247                         if ( !$res ) {
2248                                 wfProfileOut( __METHOD__ );
2249                                 return array();
2250                         }
2251                         $row = $db->fetchObject( $res );
2252                         if ( $continue == 2 && $revLatest && $row->rev_id != $revLatest ) {
2253                                 $db = wfGetDB( DB_MASTER );
2254                                 $continue--;
2255                         } else {
2256                                 $continue = 0;
2257                         }
2258                 } while ( $continue );
2259
2260                 $authors = array( $row->rev_user_text );
2261                 while ( $row = $db->fetchObject( $res ) ) {
2262                         $authors[] = $row->rev_user_text;
2263                 }
2264                 wfProfileOut( __METHOD__ );
2265                 return $authors;
2266         }
2267
2268         /**
2269          * Output deletion confirmation dialog
2270          * @param $reason string Prefilled reason
2271          */
2272         function confirmDelete( $reason ) {
2273                 global $wgOut, $wgUser;
2274
2275                 wfDebug( "Article::confirmDelete\n" );
2276
2277                 $wgOut->setSubtitle( wfMsg( 'delete-backlink', $wgUser->getSkin()->makeKnownLinkObj( $this->mTitle ) ) );
2278                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2279                 $wgOut->addWikiMsg( 'confirmdeletetext' );
2280
2281                 if( $wgUser->isAllowed( 'suppressrevision' ) ) {
2282                         $suppress = "<tr id=\"wpDeleteSuppressRow\" name=\"wpDeleteSuppressRow\">
2283                                         <td></td>
2284                                         <td class='mw-input'>" .
2285                                                 Xml::checkLabel( wfMsg( 'revdelete-suppress' ),
2286                                                         'wpSuppress', 'wpSuppress', false, array( 'tabindex' => '4' ) ) .
2287                                         "</td>
2288                                 </tr>";
2289                 } else {
2290                         $suppress = '';
2291                 }
2292                 $checkWatch = $wgUser->getBoolOption( 'watchdeletion' ) || $this->mTitle->userIsWatching();
2293
2294                 $form = Xml::openElement( 'form', array( 'method' => 'post',
2295                         'action' => $this->mTitle->getLocalURL( 'action=delete' ), 'id' => 'deleteconfirm' ) ) .
2296                         Xml::openElement( 'fieldset', array( 'id' => 'mw-delete-table' ) ) .
2297                         Xml::tags( 'legend', null, wfMsgExt( 'delete-legend', array( 'parsemag', 'escapenoentities' ) ) ) .
2298                         Xml::openElement( 'table', array( 'id' => 'mw-deleteconfirm-table' ) ) .
2299                         "<tr id=\"wpDeleteReasonListRow\">
2300                                 <td class='mw-label'>" .
2301                                         Xml::label( wfMsg( 'deletecomment' ), 'wpDeleteReasonList' ) .
2302                                 "</td>
2303                                 <td class='mw-input'>" .
2304                                         Xml::listDropDown( 'wpDeleteReasonList',
2305                                                 wfMsgForContent( 'deletereason-dropdown' ),
2306                                                 wfMsgForContent( 'deletereasonotherlist' ), '', 'wpReasonDropDown', 1 ) .
2307                                 "</td>
2308                         </tr>
2309                         <tr id=\"wpDeleteReasonRow\">
2310                                 <td class='mw-label'>" .
2311                                         Xml::label( wfMsg( 'deleteotherreason' ), 'wpReason' ) .
2312                                 "</td>
2313                                 <td class='mw-input'>" .
2314                                         Xml::input( 'wpReason', 60, $reason, array( 'type' => 'text', 'maxlength' => '255',
2315                                                 'tabindex' => '2', 'id' => 'wpReason' ) ) .
2316                                 "</td>
2317                         </tr>
2318                         <tr>
2319                                 <td></td>
2320                                 <td class='mw-input'>" .
2321                                         Xml::checkLabel( wfMsg( 'watchthis' ),
2322                                                 'wpWatch', 'wpWatch', $checkWatch, array( 'tabindex' => '3' ) ) .
2323                                 "</td>
2324                         </tr>
2325                         $suppress
2326                         <tr>
2327                                 <td></td>
2328                                 <td class='mw-submit'>" .
2329                                         Xml::submitButton( wfMsg( 'deletepage' ),
2330                                                 array( 'name' => 'wpConfirmB', 'id' => 'wpConfirmB', 'tabindex' => '5' ) ) .
2331                                 "</td>
2332                         </tr>" .
2333                         Xml::closeElement( 'table' ) .
2334                         Xml::closeElement( 'fieldset' ) .
2335                         Xml::hidden( 'wpEditToken', $wgUser->editToken() ) .
2336                         Xml::closeElement( 'form' );
2337
2338                         if ( $wgUser->isAllowed( 'editinterface' ) ) {
2339                                 $skin = $wgUser->getSkin();
2340                                 $link = $skin->makeLink ( 'MediaWiki:Deletereason-dropdown', wfMsgHtml( 'delete-edit-reasonlist' ) );
2341                                 $form .= '<p class="mw-delete-editreasons">' . $link . '</p>';
2342                         }
2343
2344                 $wgOut->addHTML( $form );
2345                 $this->showLogExtract( $wgOut );
2346         }
2347
2348
2349         /**
2350          * Show relevant lines from the deletion log
2351          */
2352         function showLogExtract( $out ) {
2353                 $out->addHTML( Xml::element( 'h2', null, LogPage::logName( 'delete' ) ) );
2354                 LogEventsList::showLogExtract( $out, 'delete', $this->mTitle->getPrefixedText() );
2355         }
2356
2357
2358         /**
2359          * Perform a deletion and output success or failure messages
2360          */
2361         function doDelete( $reason, $suppress = false ) {
2362                 global $wgOut, $wgUser;
2363                 wfDebug( __METHOD__."\n" );
2364
2365                 $id = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
2366
2367                 $error = '';
2368
2369                 if ( wfRunHooks('ArticleDelete', array(&$this, &$wgUser, &$reason, &$error)) ) {
2370                         if ( $this->doDeleteArticle( $reason, $suppress, $id ) ) {
2371                                 $deleted = $this->mTitle->getPrefixedText();
2372
2373                                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
2374                                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2375
2376                                 $loglink = '[[Special:Log/delete|' . wfMsgNoTrans( 'deletionlog' ) . ']]';
2377
2378                                 $wgOut->addWikiMsg( 'deletedtext', $deleted, $loglink );
2379                                 $wgOut->returnToMain( false );
2380                                 wfRunHooks('ArticleDeleteComplete', array(&$this, &$wgUser, $reason, $id));
2381                         } else {
2382                                 if ($error == '')
2383                                         $wgOut->showFatalError( wfMsg( 'cannotdelete' ) );
2384                                 else
2385                                         $wgOut->showFatalError( $error );
2386                         }
2387                 }
2388         }
2389
2390         /**
2391          * Back-end article deletion
2392          * Deletes the article with database consistency, writes logs, purges caches
2393          * Returns success
2394          */
2395         function doDeleteArticle( $reason, $suppress = false, $id = 0 ) {
2396                 global $wgUseSquid, $wgDeferredUpdateList;
2397                 global $wgUseTrackbacks;
2398
2399                 wfDebug( __METHOD__."\n" );
2400
2401                 $dbw = wfGetDB( DB_MASTER );
2402                 $ns = $this->mTitle->getNamespace();
2403                 $t = $this->mTitle->getDBkey();
2404                 $id = $id ? $id : $this->mTitle->getArticleID( GAID_FOR_UPDATE );
2405
2406                 if ( $t == '' || $id == 0 ) {
2407                         return false;
2408                 }
2409
2410                 $u = new SiteStatsUpdate( 0, 1, -(int)$this->isCountable( $this->getContent() ), -1 );
2411                 array_push( $wgDeferredUpdateList, $u );
2412
2413                 // Bitfields to further suppress the content
2414                 if ( $suppress ) {
2415                         $bitfield = 0;
2416                         // This should be 15...
2417                         $bitfield |= Revision::DELETED_TEXT;
2418                         $bitfield |= Revision::DELETED_COMMENT;
2419                         $bitfield |= Revision::DELETED_USER;
2420                         $bitfield |= Revision::DELETED_RESTRICTED;
2421                 } else {
2422                         $bitfield = 'rev_deleted';
2423                 }
2424
2425                 $dbw->begin();
2426                 // For now, shunt the revision data into the archive table.
2427                 // Text is *not* removed from the text table; bulk storage
2428                 // is left intact to avoid breaking block-compression or
2429                 // immutable storage schemes.
2430                 //
2431                 // For backwards compatibility, note that some older archive
2432                 // table entries will have ar_text and ar_flags fields still.
2433                 //
2434                 // In the future, we may keep revisions and mark them with
2435                 // the rev_deleted field, which is reserved for this purpose.
2436                 $dbw->insertSelect( 'archive', array( 'page', 'revision' ),
2437                         array(
2438                                 'ar_namespace'  => 'page_namespace',
2439                                 'ar_title'      => 'page_title',
2440                                 'ar_comment'    => 'rev_comment',
2441                                 'ar_user'       => 'rev_user',
2442                                 'ar_user_text'  => 'rev_user_text',
2443                                 'ar_timestamp'  => 'rev_timestamp',
2444                                 'ar_minor_edit' => 'rev_minor_edit',
2445                                 'ar_rev_id'     => 'rev_id',
2446                                 'ar_text_id'    => 'rev_text_id',
2447                                 'ar_text'       => '\'\'', // Be explicit to appease
2448                                 'ar_flags'      => '\'\'', // MySQL's "strict mode"...
2449                                 'ar_len'        => 'rev_len',
2450                                 'ar_page_id'    => 'page_id',
2451                                 'ar_deleted'    => $bitfield
2452                         ), array(
2453                                 'page_id' => $id,
2454                                 'page_id = rev_page'
2455                         ), __METHOD__
2456                 );
2457
2458                 # Delete restrictions for it
2459                 $dbw->delete( 'page_restrictions', array ( 'pr_page' => $id ), __METHOD__ );
2460
2461                 # Now that it's safely backed up, delete it
2462                 $dbw->delete( 'page', array( 'page_id' => $id ), __METHOD__);
2463                 $ok = ( $dbw->affectedRows() > 0 ); // getArticleId() uses slave, could be laggy
2464                 if( !$ok ) {
2465                         $dbw->rollback();
2466                         return false;
2467                 }
2468
2469                 # If using cascading deletes, we can skip some explicit deletes
2470                 if ( !$dbw->cascadingDeletes() ) {
2471                         $dbw->delete( 'revision', array( 'rev_page' => $id ), __METHOD__ );
2472
2473                         if ($wgUseTrackbacks)
2474                                 $dbw->delete( 'trackbacks', array( 'tb_page' => $id ), __METHOD__ );
2475
2476                         # Delete outgoing links
2477                         $dbw->delete( 'pagelinks', array( 'pl_from' => $id ) );
2478                         $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
2479                         $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
2480                         $dbw->delete( 'templatelinks', array( 'tl_from' => $id ) );
2481                         $dbw->delete( 'externallinks', array( 'el_from' => $id ) );
2482                         $dbw->delete( 'langlinks', array( 'll_from' => $id ) );
2483                         $dbw->delete( 'redirect', array( 'rd_from' => $id ) );
2484                 }
2485
2486                 # If using cleanup triggers, we can skip some manual deletes
2487                 if ( !$dbw->cleanupTriggers() ) {
2488                         # Clean up recentchanges entries...
2489                         $dbw->delete( 'recentchanges',
2490                                 array( 'rc_type != '.RC_LOG,
2491                                         'rc_namespace' => $this->mTitle->getNamespace(),
2492                                         'rc_title' => $this->mTitle->getDBKey() ),
2493                                 __METHOD__ );
2494                         $dbw->delete( 'recentchanges',
2495                                 array( 'rc_type != '.RC_LOG, 'rc_cur_id' => $id ),
2496                                 __METHOD__ );
2497                 }
2498
2499                 # Clear caches
2500                 Article::onArticleDelete( $this->mTitle );
2501
2502                 # Fix category table counts
2503                 $cats = array();
2504                 $res = $dbw->select( 'categorylinks', 'cl_to', array( 'cl_from' => $id ), __METHOD__ );
2505                 foreach( $res as $row ) {
2506                         $cats []= $row->cl_to;
2507                 }
2508                 $this->updateCategoryCounts( array(), $cats );
2509
2510                 # Clear the cached article id so the interface doesn't act like we exist
2511                 $this->mTitle->resetArticleID( 0 );
2512                 $this->mTitle->mArticleID = 0;
2513
2514                 # Log the deletion, if the page was suppressed, log it at Oversight instead
2515                 $logtype = $suppress ? 'suppress' : 'delete';
2516                 $log = new LogPage( $logtype );
2517
2518                 # Make sure logging got through
2519                 $log->addEntry( 'delete', $this->mTitle, $reason, array() );
2520
2521                 $dbw->commit();
2522
2523                 return true;
2524         }
2525
2526         /**
2527          * Roll back the most recent consecutive set of edits to a page
2528          * from the same user; fails if there are no eligible edits to
2529          * roll back to, e.g. user is the sole contributor. This function
2530          * performs permissions checks on $wgUser, then calls commitRollback()
2531          * to do the dirty work
2532          *
2533          * @param string $fromP - Name of the user whose edits to rollback.
2534          * @param string $summary - Custom summary. Set to default summary if empty.
2535          * @param string $token - Rollback token.
2536          * @param bool   $bot - If true, mark all reverted edits as bot.
2537          *
2538          * @param array $resultDetails contains result-specific array of additional values
2539          *    'alreadyrolled' : 'current' (rev)
2540          *    success        : 'summary' (str), 'current' (rev), 'target' (rev)
2541          *
2542          * @return array of errors, each error formatted as
2543          *   array(messagekey, param1, param2, ...).
2544          * On success, the array is empty.  This array can also be passed to
2545          * OutputPage::showPermissionsErrorPage().
2546          */
2547         public function doRollback( $fromP, $summary, $token, $bot, &$resultDetails ) {
2548                 global $wgUser;
2549                 $resultDetails = null;
2550
2551                 # Check permissions
2552                 $errors = array_merge( $this->mTitle->getUserPermissionsErrors( 'edit', $wgUser ),
2553                         $this->mTitle->getUserPermissionsErrors( 'rollback', $wgUser ) );
2554                 if( !$wgUser->matchEditToken( $token, array( $this->mTitle->getPrefixedText(), $fromP ) ) )
2555                         $errors[] = array( 'sessionfailure' );
2556
2557                 if ( $wgUser->pingLimiter('rollback') || $wgUser->pingLimiter() ) {
2558                         $errors[] = array( 'actionthrottledtext' );
2559                 }
2560                 # If there were errors, bail out now
2561                 if(!empty($errors))
2562                         return $errors;
2563
2564                 return $this->commitRollback($fromP, $summary, $bot, $resultDetails);
2565         }
2566
2567         /**
2568          * Backend implementation of doRollback(), please refer there for parameter
2569          * and return value documentation
2570          *
2571          * NOTE: This function does NOT check ANY permissions, it just commits the
2572          * rollback to the DB Therefore, you should only call this function direct-
2573          * ly if you want to use custom permissions checks. If you don't, use
2574          * doRollback() instead.
2575          */
2576         public function commitRollback($fromP, $summary, $bot, &$resultDetails) {
2577                 global $wgUseRCPatrol, $wgUser, $wgLang;
2578                 $dbw = wfGetDB( DB_MASTER );
2579
2580                 if( wfReadOnly() ) {
2581                         return array( array( 'readonlytext' ) );
2582                 }
2583
2584                 # Get the last editor
2585                 $current = Revision::newFromTitle( $this->mTitle );
2586                 if( is_null( $current ) ) {
2587                         # Something wrong... no page?
2588                         return array(array('notanarticle'));
2589                 }
2590
2591                 $from = str_replace( '_', ' ', $fromP );
2592                 if( $from != $current->getUserText() ) {
2593                         $resultDetails = array( 'current' => $current );
2594                         return array(array('alreadyrolled',
2595                                 htmlspecialchars($this->mTitle->getPrefixedText()),
2596                                 htmlspecialchars($fromP),
2597                                 htmlspecialchars($current->getUserText())
2598                         ));
2599                 }
2600
2601                 # Get the last edit not by this guy
2602                 $user = intval( $current->getUser() );
2603                 $user_text = $dbw->addQuotes( $current->getUserText() );
2604                 $s = $dbw->selectRow( 'revision',
2605                         array( 'rev_id', 'rev_timestamp', 'rev_deleted' ),
2606                         array(  'rev_page' => $current->getPage(),
2607                                 "rev_user <> {$user} OR rev_user_text <> {$user_text}"
2608                         ), __METHOD__,
2609                         array(  'USE INDEX' => 'page_timestamp',
2610                                 'ORDER BY'  => 'rev_timestamp DESC' )
2611                         );
2612                 if( $s === false ) {
2613                         # No one else ever edited this page
2614                         return array(array('cantrollback'));
2615                 } else if( $s->rev_deleted & REVISION::DELETED_TEXT || $s->rev_deleted & REVISION::DELETED_USER ) {
2616                         # Only admins can see this text
2617                         return array(array('notvisiblerev'));
2618                 }
2619
2620                 $set = array();
2621                 if ( $bot && $wgUser->isAllowed('markbotedits') ) {
2622                         # Mark all reverted edits as bot
2623                         $set['rc_bot'] = 1;
2624                 }
2625                 if ( $wgUseRCPatrol ) {
2626                         # Mark all reverted edits as patrolled
2627                         $set['rc_patrolled'] = 1;
2628                 }
2629
2630                 if ( $set ) {
2631                         $dbw->update( 'recentchanges', $set,
2632                                         array( /* WHERE */
2633                                                 'rc_cur_id' => $current->getPage(),
2634                                                 'rc_user_text' => $current->getUserText(),
2635                                                 "rc_timestamp > '{$s->rev_timestamp}'",
2636                                         ), __METHOD__
2637                                 );
2638                 }
2639
2640                 # Generate the edit summary if necessary
2641                 $target = Revision::newFromId( $s->rev_id );
2642                 if( empty( $summary ) ){
2643                         $summary = wfMsgForContent( 'revertpage' );
2644                 }
2645
2646                 # Allow the custom summary to use the same args as the default message
2647                 $args = array(
2648                         $target->getUserText(), $from, $s->rev_id,
2649                         $wgLang->timeanddate(wfTimestamp(TS_MW, $s->rev_timestamp), true),
2650                         $current->getId(), $wgLang->timeanddate($current->getTimestamp())
2651                 );
2652                 $summary = wfMsgReplaceArgs( $summary, $args );
2653
2654                 # Save
2655                 $flags = EDIT_UPDATE;
2656
2657                 if( $wgUser->isAllowed('minoredit') )
2658                         $flags |= EDIT_MINOR;
2659
2660                 if( $bot && ($wgUser->isAllowed('markbotedits') || $wgUser->isAllowed('bot')) )
2661                         $flags |= EDIT_FORCE_BOT;
2662                 # Actually store the edit
2663                 $status = $this->doEdit( $target->getText(), $summary, $flags, $target->getId() );
2664                 if ( !empty( $status->value['revision'] ) ) {
2665                         $revId = $status->value['revision']->getId();
2666                 } else {
2667                         $revId = false;
2668                 }
2669
2670                 wfRunHooks( 'ArticleRollbackComplete', array( $this, $wgUser, $target ) );
2671
2672                 $resultDetails = array(
2673                         'summary' => $summary,
2674                         'current' => $current,
2675                         'target' => $target,
2676                         'newid' => $revId
2677                 );
2678                 return array();
2679         }
2680
2681         /**
2682          * User interface for rollback operations
2683          */
2684         function rollback() {
2685                 global $wgUser, $wgOut, $wgRequest, $wgUseRCPatrol;
2686                 $details = null;
2687
2688                 $result = $this->doRollback(
2689                         $wgRequest->getVal( 'from' ),
2690                         $wgRequest->getText( 'summary' ),
2691                         $wgRequest->getVal( 'token' ),
2692                         $wgRequest->getBool( 'bot' ),
2693                         $details
2694                 );
2695
2696                 if( in_array( array( 'blocked' ), $result ) ) {
2697                         $wgOut->blockedPage();
2698                         return;
2699                 }
2700                 if( in_array( array( 'actionthrottledtext' ), $result ) ) {
2701                         $wgOut->rateLimited();
2702                         return;
2703                 }
2704                 if( isset( $result[0][0] ) && ( $result[0][0] == 'alreadyrolled' || $result[0][0] == 'cantrollback' ) ) {
2705                         $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
2706                         $errArray = $result[0];
2707                         $errMsg = array_shift( $errArray );
2708                         $wgOut->addWikiMsgArray( $errMsg, $errArray );
2709                         if( isset( $details['current'] ) ){
2710                                 $current = $details['current'];
2711                                 if( $current->getComment() != '' ) {
2712                                         $wgOut->addWikiMsgArray( 'editcomment', array(
2713                                                 $wgUser->getSkin()->formatComment( $current->getComment() ) ), array( 'replaceafter' ) );
2714                                 }
2715                         }
2716                         return;
2717                 }
2718                 # Display permissions errors before read-only message -- there's no
2719                 # point in misleading the user into thinking the inability to rollback
2720                 # is only temporary.
2721                 if( !empty($result) && $result !== array( array('readonlytext') ) ) {
2722                         # array_diff is completely broken for arrays of arrays, sigh.  Re-
2723                         # move any 'readonlytext' error manually.
2724                         $out = array();
2725                         foreach( $result as $error ) {
2726                                 if( $error != array( 'readonlytext' ) ) {
2727                                         $out []= $error;
2728                                 }
2729                         }
2730                         $wgOut->showPermissionsErrorPage( $out );
2731                         return;
2732                 }
2733                 if( $result == array( array('readonlytext') ) ) {
2734                         $wgOut->readOnlyPage();
2735                         return;
2736                 }
2737
2738                 $current = $details['current'];
2739                 $target = $details['target'];
2740                 $newId = $details['newid'];
2741                 $wgOut->setPageTitle( wfMsg( 'actioncomplete' ) );
2742                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
2743                 $old = $wgUser->getSkin()->userLink( $current->getUser(), $current->getUserText() )
2744                         . $wgUser->getSkin()->userToolLinks( $current->getUser(), $current->getUserText() );
2745                 $new = $wgUser->getSkin()->userLink( $target->getUser(), $target->getUserText() )
2746                         . $wgUser->getSkin()->userToolLinks( $target->getUser(), $target->getUserText() );
2747                 $wgOut->addHTML( wfMsgExt( 'rollback-success', array( 'parse', 'replaceafter' ), $old, $new ) );
2748                 $wgOut->returnToMain( false, $this->mTitle );
2749
2750                 if( !$wgRequest->getBool( 'hidediff', false ) && !$wgUser->getBoolOption( 'norollbackdiff', false ) ) {
2751                         $de = new DifferenceEngine( $this->mTitle, $current->getId(), $newId, false, true );
2752                         $de->showDiff( '', '' );
2753                 }
2754         }
2755
2756
2757         /**
2758          * Do standard deferred updates after page view
2759          * @private
2760          */
2761         function viewUpdates() {
2762                 global $wgDeferredUpdateList, $wgUser;
2763
2764                 if ( 0 != $this->getID() ) {
2765                         # Don't update page view counters on views from bot users (bug 14044)
2766                         global $wgDisableCounters;
2767                         if( !$wgDisableCounters && !$wgUser->isAllowed( 'bot' ) ) {
2768                                 Article::incViewCount( $this->getID() );
2769                                 $u = new SiteStatsUpdate( 1, 0, 0 );
2770                                 array_push( $wgDeferredUpdateList, $u );
2771                         }
2772                 }
2773
2774                 # Update newtalk / watchlist notification status
2775                 $wgUser->clearNotification( $this->mTitle );
2776         }
2777
2778         /**
2779          * Prepare text which is about to be saved.
2780          * Returns a stdclass with source, pst and output members
2781          */
2782         function prepareTextForEdit( $text, $revid=null ) {
2783                 if ( $this->mPreparedEdit && $this->mPreparedEdit->newText == $text && $this->mPreparedEdit->revid == $revid) {
2784                         // Already prepared
2785                         return $this->mPreparedEdit;
2786                 }
2787                 global $wgParser;
2788                 $edit = (object)array();
2789                 $edit->revid = $revid;
2790                 $edit->newText = $text;
2791                 $edit->pst = $this->preSaveTransform( $text );
2792                 $options = new ParserOptions;
2793                 $options->setTidy( true );
2794                 $options->enableLimitReport();
2795                 $edit->output = $wgParser->parse( $edit->pst, $this->mTitle, $options, true, true, $revid );
2796                 $edit->oldText = $this->getContent();
2797                 $this->mPreparedEdit = $edit;
2798                 return $edit;
2799         }
2800
2801         /**
2802          * Do standard deferred updates after page edit.
2803          * Update links tables, site stats, search index and message cache.
2804          * Purges pages that include this page if the text was changed here.
2805          * Every 100th edit, prune the recent changes table.
2806          *
2807          * @private
2808          * @param $text New text of the article
2809          * @param $summary Edit summary
2810          * @param $minoredit Minor edit
2811          * @param $timestamp_of_pagechange Timestamp associated with the page change
2812          * @param $newid rev_id value of the new revision
2813          * @param $changed Whether or not the content actually changed
2814          */
2815         function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange, $newid, $changed = true ) {
2816                 global $wgDeferredUpdateList, $wgMessageCache, $wgUser, $wgParser, $wgEnableParserCache;
2817
2818                 wfProfileIn( __METHOD__ );
2819
2820                 # Parse the text
2821                 # Be careful not to double-PST: $text is usually already PST-ed once
2822                 if ( !$this->mPreparedEdit || $this->mPreparedEdit->output->getFlag( 'vary-revision' ) ) {
2823                         wfDebug( __METHOD__ . ": No prepared edit or vary-revision is set...\n" );
2824                         $editInfo = $this->prepareTextForEdit( $text, $newid );
2825                 } else {
2826                         wfDebug( __METHOD__ . ": No vary-revision, using prepared edit...\n" );
2827                         $editInfo = $this->mPreparedEdit;
2828                 }
2829
2830                 # Save it to the parser cache
2831                 if ( $wgEnableParserCache ) {
2832                         $parserCache = ParserCache::singleton();
2833                         $parserCache->save( $editInfo->output, $this, $wgUser );
2834                 }
2835
2836                 # Update the links tables
2837                 $u = new LinksUpdate( $this->mTitle, $editInfo->output, false );
2838                 $u->setRecursiveTouch( $changed ); // refresh/invalidate including pages too
2839                 $u->doUpdate();
2840
2841                 wfRunHooks( 'ArticleEditUpdates', array( &$this, &$editInfo, $changed ) );
2842
2843                 if( wfRunHooks( 'ArticleEditUpdatesDeleteFromRecentchanges', array( &$this ) ) ) {
2844                         if ( 0 == mt_rand( 0, 99 ) ) {
2845                                 // Flush old entries from the `recentchanges` table; we do this on
2846                                 // random requests so as to avoid an increase in writes for no good reason
2847                                 global $wgRCMaxAge;
2848                                 $dbw = wfGetDB( DB_MASTER );
2849                                 $cutoff = $dbw->timestamp( time() - $wgRCMaxAge );
2850                                 $recentchanges = $dbw->tableName( 'recentchanges' );
2851                                 $sql = "DELETE FROM $recentchanges WHERE rc_timestamp < '{$cutoff}'";
2852                                 $dbw->query( $sql );
2853                         }
2854                 }
2855
2856                 $id = $this->getID();
2857                 $title = $this->mTitle->getPrefixedDBkey();
2858                 $shortTitle = $this->mTitle->getDBkey();
2859
2860                 if ( 0 == $id ) {
2861                         wfProfileOut( __METHOD__ );
2862                         return;
2863                 }
2864
2865                 $u = new SiteStatsUpdate( 0, 1, $this->mGoodAdjustment, $this->mTotalAdjustment );
2866                 array_push( $wgDeferredUpdateList, $u );
2867                 $u = new SearchUpdate( $id, $title, $text );
2868                 array_push( $wgDeferredUpdateList, $u );
2869
2870                 # If this is another user's talk page, update newtalk
2871                 # Don't do this if $changed = false otherwise some idiot can null-edit a
2872                 # load of user talk pages and piss people off, nor if it's a minor edit
2873                 # by a properly-flagged bot.
2874                 if( $this->mTitle->getNamespace() == NS_USER_TALK && $shortTitle != $wgUser->getTitleKey() && $changed
2875                         && !( $minoredit && $wgUser->isAllowed( 'nominornewtalk' ) ) ) {
2876                         if( wfRunHooks('ArticleEditUpdateNewTalk', array( &$this ) ) ) {
2877                                 $other = User::newFromName( $shortTitle, false );
2878                                 if ( !$other ) {
2879                                         wfDebug( __METHOD__.": invalid username\n" );
2880                                 } elseif( User::isIP( $shortTitle ) ) {
2881                                         // An anonymous user
2882                                         $other->setNewtalk( true );
2883                                 } elseif( $other->isLoggedIn() ) {
2884                                         $other->setNewtalk( true );
2885                                 } else {
2886                                         wfDebug( __METHOD__. ": don't need to notify a nonexistent user\n" );
2887                                 }
2888                         }
2889                 }
2890
2891                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
2892                         $wgMessageCache->replace( $shortTitle, $text );
2893                 }
2894
2895                 wfProfileOut( __METHOD__ );
2896         }
2897
2898         /**
2899          * Perform article updates on a special page creation.
2900          *
2901          * @param Revision $rev
2902          *
2903          * @todo This is a shitty interface function. Kill it and replace the
2904          * other shitty functions like editUpdates and such so it's not needed
2905          * anymore.
2906          */
2907         function createUpdates( $rev ) {
2908                 $this->mGoodAdjustment = $this->isCountable( $rev->getText() );
2909                 $this->mTotalAdjustment = 1;
2910                 $this->editUpdates( $rev->getText(), $rev->getComment(),
2911                         $rev->isMinor(), wfTimestamp(), $rev->getId(), true );
2912         }
2913
2914         /**
2915          * Generate the navigation links when browsing through an article revisions
2916          * It shows the information as:
2917          *   Revision as of \<date\>; view current revision
2918          *   \<- Previous version | Next Version -\>
2919          *
2920          * @private
2921          * @param string $oldid         Revision ID of this article revision
2922          */
2923         function setOldSubtitle( $oldid=0 ) {
2924                 global $wgLang, $wgOut, $wgUser;
2925
2926                 if ( !wfRunHooks( 'DisplayOldSubtitle', array(&$this, &$oldid) ) ) {
2927                                 return;
2928                 }
2929
2930                 $revision = Revision::newFromId( $oldid );
2931
2932                 $current = ( $oldid == $this->mLatest );
2933                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
2934                 $sk = $wgUser->getSkin();
2935                 $lnk = $current
2936                         ? wfMsg( 'currentrevisionlink' )
2937                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
2938                 $curdiff = $current
2939                         ? wfMsg( 'diff' )
2940                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'diff' ), 'diff=cur&oldid='.$oldid );
2941                 $prev = $this->mTitle->getPreviousRevisionID( $oldid ) ;
2942                 $prevlink = $prev
2943                         ? $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid )
2944                         : wfMsg( 'previousrevision' );
2945                 $prevdiff = $prev
2946                         ? $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'diff' ), 'diff=prev&oldid='.$oldid )
2947                         : wfMsg( 'diff' );
2948                 $nextlink = $current
2949                         ? wfMsg( 'nextrevision' )
2950                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
2951                 $nextdiff = $current
2952                         ? wfMsg( 'diff' )
2953                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'diff' ), 'diff=next&oldid='.$oldid );
2954
2955                 $cdel='';
2956                 if( $wgUser->isAllowed( 'deleterevision' ) ) {
2957                         $revdel = SpecialPage::getTitleFor( 'Revisiondelete' );
2958                         if( $revision->isCurrent() ) {
2959                         // We don't handle top deleted edits too well
2960                                 $cdel = wfMsgHtml('rev-delundel');
2961                         } else if( !$revision->userCan( Revision::DELETED_RESTRICTED ) ) {
2962                         // If revision was hidden from sysops
2963                                 $cdel = wfMsgHtml('rev-delundel');
2964                         } else {
2965                                 $cdel = $sk->makeKnownLinkObj( $revdel,
2966                                         wfMsgHtml('rev-delundel'),
2967                                         'target=' . urlencode( $this->mTitle->getPrefixedDbkey() ) .
2968                                         '&oldid=' . urlencode( $oldid ) );
2969                                 // Bolden oversighted content
2970                                 if( $revision->isDeleted( Revision::DELETED_RESTRICTED ) )
2971                                         $cdel = "<strong>$cdel</strong>";
2972                         }
2973                         $cdel = "(<small>$cdel</small>) ";
2974                 }
2975                 # Show user links if allowed to see them. Normally they
2976                 # are hidden regardless, but since we can already see the text here...
2977                 $userlinks = $sk->revUserTools( $revision, false );
2978
2979                 $m = wfMsg( 'revision-info-current' );
2980                 $infomsg = $current && !wfEmptyMsg( 'revision-info-current', $m ) && $m != '-'
2981                         ? 'revision-info-current'
2982                         : 'revision-info';
2983
2984                 $r = "\n\t\t\t\t<div id=\"mw-{$infomsg}\">" . wfMsg( $infomsg, $td, $userlinks, $revision->getID() ) . "</div>\n" .
2985
2986                      "\n\t\t\t\t<div id=\"mw-revision-nav\">" . $cdel . wfMsg( 'revision-nav', $prevdiff,
2987                                 $prevlink, $lnk, $curdiff, $nextlink, $nextdiff ) . "</div>\n\t\t\t";
2988                 $wgOut->setSubtitle( $r );
2989         }
2990
2991         /**
2992          * This function is called right before saving the wikitext,
2993          * so we can do things like signatures and links-in-context.
2994          *
2995          * @param string $text
2996          */
2997         function preSaveTransform( $text ) {
2998                 global $wgParser, $wgUser;
2999                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
3000         }
3001
3002         /* Caching functions */
3003
3004         /**
3005          * checkLastModified returns true if it has taken care of all
3006          * output to the client that is necessary for this request.
3007          * (that is, it has sent a cached version of the page)
3008          */
3009         function tryFileCache() {
3010                 static $called = false;
3011                 if( $called ) {
3012                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
3013                         return false;
3014                 }
3015                 $called = true;
3016                 if( $this->isFileCacheable() ) {
3017                         $touched = $this->mTouched;
3018                         $cache = new HTMLFileCache( $this->mTitle );
3019                         if( $cache->isFileCacheGood( $touched ) ) {
3020                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
3021                                 $cache->loadFromFileCache();
3022                                 return true;
3023                         } else {
3024                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
3025                                 ob_start( array(&$cache, 'saveToFileCache' ) );
3026                         }
3027                 } else {
3028                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
3029                 }
3030                 return false;
3031         }
3032
3033         /**
3034          * Check if the page can be cached
3035          * @return bool
3036          */
3037         function isFileCacheable() {
3038                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest, $wgLang, $wgContLang;
3039                 // Get all query values
3040                 $queryVals = $wgRequest->getValues();
3041                 foreach( $queryVals as $query => $val ) {
3042                         if( $query == 'title' || ($query == 'action' && $val == 'view') ) {
3043                                 // Normal page view in query form
3044                         } else {
3045                                 return false;
3046                         }
3047                 }
3048                 // Check for non-standard user language; this covers uselang,
3049                 // and extensions for auto-detecting user language.
3050                 $ulang = $wgLang->getCode();
3051                 $clang = $wgContLang->getCode();
3052
3053                 $cacheable = $wgUseFileCache
3054                         && (!$wgShowIPinHeader)
3055                         && ($this->getID() > 0)
3056                         && ($wgUser->isAnon())
3057                         && (!$wgUser->getNewtalk())
3058                         && (!$this->mRedirectedFrom)
3059                         && ($ulang === $clang);
3060                 // Extension may have reason to disable file caching on some pages.
3061                 if( $cacheable ) {
3062                         $cacheable = wfRunHooks( 'IsFileCacheable', array( &$this ) );
3063                 }
3064                 return $cacheable;
3065         }
3066
3067         /**
3068          * Loads page_touched and returns a value indicating if it should be used
3069          *
3070          */
3071         function checkTouched() {
3072                 if( !$this->mDataLoaded ) {
3073                         $this->loadPageData();
3074                 }
3075                 return !$this->mIsRedirect;
3076         }
3077
3078         /**
3079          * Get the page_touched field
3080          */
3081         function getTouched() {
3082                 # Ensure that page data has been loaded
3083                 if( !$this->mDataLoaded ) {
3084                         $this->loadPageData();
3085                 }
3086                 return $this->mTouched;
3087         }
3088
3089         /**
3090          * Get the page_latest field
3091          */
3092         function getLatest() {
3093                 if ( !$this->mDataLoaded ) {
3094                         $this->loadPageData();
3095                 }
3096                 return $this->mLatest;
3097         }
3098
3099         /**
3100          * Edit an article without doing all that other stuff
3101          * The article must already exist; link tables etc
3102          * are not updated, caches are not flushed.
3103          *
3104          * @param string $text text submitted
3105          * @param string $comment comment submitted
3106          * @param bool $minor whereas it's a minor modification
3107          */
3108         function quickEdit( $text, $comment = '', $minor = 0 ) {
3109                 wfProfileIn( __METHOD__ );
3110
3111                 $dbw = wfGetDB( DB_MASTER );
3112                 $revision = new Revision( array(
3113                         'page'       => $this->getId(),
3114                         'text'       => $text,
3115                         'comment'    => $comment,
3116                         'minor_edit' => $minor ? 1 : 0,
3117                         ) );
3118                 $revision->insertOn( $dbw );
3119                 $this->updateRevisionOn( $dbw, $revision );
3120
3121                 wfRunHooks( 'NewRevisionFromEditComplete', array($this, $revision, false) );
3122
3123                 wfProfileOut( __METHOD__ );
3124         }
3125
3126         /**
3127          * Used to increment the view counter
3128          *
3129          * @static
3130          * @param integer $id article id
3131          */
3132         function incViewCount( $id ) {
3133                 $id = intval( $id );
3134                 global $wgHitcounterUpdateFreq, $wgDBtype;
3135
3136                 $dbw = wfGetDB( DB_MASTER );
3137                 $pageTable = $dbw->tableName( 'page' );
3138                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
3139                 $acchitsTable = $dbw->tableName( 'acchits' );
3140
3141                 if( $wgHitcounterUpdateFreq <= 1 ) {
3142                         $dbw->query( "UPDATE $pageTable SET page_counter = page_counter + 1 WHERE page_id = $id" );
3143                         return;
3144                 }
3145
3146                 # Not important enough to warrant an error page in case of failure
3147                 $oldignore = $dbw->ignoreErrors( true );
3148
3149                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
3150
3151                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
3152                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
3153                         # Most of the time (or on SQL errors), skip row count check
3154                         $dbw->ignoreErrors( $oldignore );
3155                         return;
3156                 }
3157
3158                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
3159                 $row = $dbw->fetchObject( $res );
3160                 $rown = intval( $row->n );
3161                 if( $rown >= $wgHitcounterUpdateFreq ){
3162                         wfProfileIn( 'Article::incViewCount-collect' );
3163                         $old_user_abort = ignore_user_abort( true );
3164
3165                         if ($wgDBtype == 'mysql')
3166                                 $dbw->query("LOCK TABLES $hitcounterTable WRITE");
3167                         $tabletype = $wgDBtype == 'mysql' ? "ENGINE=HEAP " : '';
3168                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable $tabletype AS ".
3169                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
3170                                 'GROUP BY hc_id');
3171                         $dbw->query("DELETE FROM $hitcounterTable");
3172                         if ($wgDBtype == 'mysql') {
3173                                 $dbw->query('UNLOCK TABLES');
3174                                 $dbw->query("UPDATE $pageTable,$acchitsTable SET page_counter=page_counter + hc_n ".
3175                                         'WHERE page_id = hc_id');
3176                         }
3177                         else {
3178                                 $dbw->query("UPDATE $pageTable SET page_counter=page_counter + hc_n ".
3179                                         "FROM $acchitsTable WHERE page_id = hc_id");
3180                         }
3181                         $dbw->query("DROP TABLE $acchitsTable");
3182
3183                         ignore_user_abort( $old_user_abort );
3184                         wfProfileOut( 'Article::incViewCount-collect' );
3185                 }
3186                 $dbw->ignoreErrors( $oldignore );
3187         }
3188
3189         /**#@+
3190          * The onArticle*() functions are supposed to be a kind of hooks
3191          * which should be called whenever any of the specified actions
3192          * are done.
3193          *
3194          * This is a good place to put code to clear caches, for instance.
3195          *
3196          * This is called on page move and undelete, as well as edit
3197          * @static
3198          * @param $title_obj a title object
3199          */
3200
3201         public static function onArticleCreate( $title ) {
3202                 # Update existence markers on article/talk tabs...
3203                 if ( $title->isTalkPage() ) {
3204                         $other = $title->getSubjectPage();
3205                 } else {
3206                         $other = $title->getTalkPage();
3207                 }
3208                 $other->invalidateCache();
3209                 $other->purgeSquid();
3210
3211                 $title->touchLinks();
3212                 $title->purgeSquid();
3213                 $title->deleteTitleProtection();
3214         }
3215
3216         public static function onArticleDelete( $title ) {
3217                 global $wgUseFileCache, $wgMessageCache;
3218                 # Update existence markers on article/talk tabs...
3219                 if( $title->isTalkPage() ) {
3220                         $other = $title->getSubjectPage();
3221                 } else {
3222                         $other = $title->getTalkPage();
3223                 }
3224                 $other->invalidateCache();
3225                 $other->purgeSquid();
3226
3227                 $title->touchLinks();
3228                 $title->purgeSquid();
3229
3230                 # File cache
3231                 if ( $wgUseFileCache ) {
3232                         $cm = new HTMLFileCache( $title );
3233                         @unlink( $cm->fileCacheName() );
3234                 }
3235
3236                 # Messages
3237                 if( $title->getNamespace() == NS_MEDIAWIKI ) {
3238                         $wgMessageCache->replace( $title->getDBkey(), false );
3239                 }
3240                 # Images
3241                 if( $title->getNamespace() == NS_IMAGE ) {
3242                         $update = new HTMLCacheUpdate( $title, 'imagelinks' );
3243                         $update->doUpdate();
3244                 }
3245                 # User talk pages
3246                 if( $title->getNamespace() == NS_USER_TALK ) {
3247                         $user = User::newFromName( $title->getText(), false );
3248                         $user->setNewtalk( false );
3249                 }
3250         }
3251
3252         /**
3253          * Purge caches on page update etc
3254          */
3255         public static function onArticleEdit( $title, $transclusions = 'transclusions' ) {
3256                 global $wgDeferredUpdateList, $wgUseFileCache;
3257
3258                 // Invalidate caches of articles which include this page
3259                 if( $transclusions !== 'skiptransclusions' )
3260                         $wgDeferredUpdateList[] = new HTMLCacheUpdate( $title, 'templatelinks' );
3261
3262                 // Invalidate the caches of all pages which redirect here
3263                 $wgDeferredUpdateList[] = new HTMLCacheUpdate( $title, 'redirect' );
3264
3265                 # Purge squid for this page only
3266                 $title->purgeSquid();
3267
3268                 # Clear file cache for this page only
3269                 if ( $wgUseFileCache ) {
3270                         $cm = new HTMLFileCache( $title );
3271                         @unlink( $cm->fileCacheName() );
3272                 }
3273         }
3274
3275         /**#@-*/
3276
3277         /**
3278          * Overriden by ImagePage class, only present here to avoid a fatal error
3279          * Called for ?action=revert
3280          */
3281         public function revert(){
3282                 global $wgOut;
3283                 $wgOut->showErrorPage( 'nosuchaction', 'nosuchactiontext' );
3284         }
3285
3286         /**
3287          * Info about this page
3288          * Called for ?action=info when $wgAllowPageInfo is on.
3289          *
3290          * @public
3291          */
3292         function info() {
3293                 global $wgLang, $wgOut, $wgAllowPageInfo, $wgUser;
3294
3295                 if ( !$wgAllowPageInfo ) {
3296                         $wgOut->showErrorPage( 'nosuchaction', 'nosuchactiontext' );
3297                         return;
3298                 }
3299
3300                 $page = $this->mTitle->getSubjectPage();
3301
3302                 $wgOut->setPagetitle( $page->getPrefixedText() );
3303                 $wgOut->setPageTitleActionText( wfMsg( 'info_short' ) );
3304                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ) );
3305
3306                 if( !$this->mTitle->exists() ) {
3307                         $wgOut->addHTML( '<div class="noarticletext">' );
3308                         if( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
3309                                 // This doesn't quite make sense; the user is asking for
3310                                 // information about the _page_, not the message... -- RC
3311                                 $wgOut->addHTML( htmlspecialchars( wfMsgWeirdKey( $this->mTitle->getText() ) ) );
3312                         } else {
3313                                 $msg = $wgUser->isLoggedIn()
3314                                         ? 'noarticletext'
3315                                         : 'noarticletextanon';
3316                                 $wgOut->addHTML( wfMsgExt( $msg, 'parse' ) );
3317                         }
3318                         $wgOut->addHTML( '</div>' );
3319                 } else {
3320                         $dbr = wfGetDB( DB_SLAVE );
3321                         $wl_clause = array(
3322                                 'wl_title'     => $page->getDBkey(),
3323                                 'wl_namespace' => $page->getNamespace() );
3324                         $numwatchers = $dbr->selectField(
3325                                 'watchlist',
3326                                 'COUNT(*)',
3327                                 $wl_clause,
3328                                 __METHOD__,
3329                                 $this->getSelectOptions() );
3330
3331                         $pageInfo = $this->pageCountInfo( $page );
3332                         $talkInfo = $this->pageCountInfo( $page->getTalkPage() );
3333
3334                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $wgLang->formatNum( $numwatchers ) ) . '</li>' );
3335                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $wgLang->formatNum( $pageInfo['edits'] ) ) . '</li>');
3336                         if( $talkInfo ) {
3337                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $wgLang->formatNum( $talkInfo['edits'] ) ) . '</li>');
3338                         }
3339                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $wgLang->formatNum( $pageInfo['authors'] ) ) . '</li>' );
3340                         if( $talkInfo ) {
3341                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $wgLang->formatNum( $talkInfo['authors'] ) ) . '</li>' );
3342                         }
3343                         $wgOut->addHTML( '</ul>' );
3344
3345                 }
3346         }
3347
3348         /**
3349          * Return the total number of edits and number of unique editors
3350          * on a given page. If page does not exist, returns false.
3351          *
3352          * @param Title $title
3353          * @return array
3354          * @private
3355          */
3356         function pageCountInfo( $title ) {
3357                 $id = $title->getArticleId();
3358                 if( $id == 0 ) {
3359                         return false;
3360                 }
3361
3362                 $dbr = wfGetDB( DB_SLAVE );
3363
3364                 $rev_clause = array( 'rev_page' => $id );
3365
3366                 $edits = $dbr->selectField(
3367                         'revision',
3368                         'COUNT(rev_page)',
3369                         $rev_clause,
3370                         __METHOD__,
3371                         $this->getSelectOptions() );
3372
3373                 $authors = $dbr->selectField(
3374                         'revision',
3375                         'COUNT(DISTINCT rev_user_text)',
3376                         $rev_clause,
3377                         __METHOD__,
3378                         $this->getSelectOptions() );
3379
3380                 return array( 'edits' => $edits, 'authors' => $authors );
3381         }
3382
3383         /**
3384          * Return a list of templates used by this article.
3385          * Uses the templatelinks table
3386          *
3387          * @return array Array of Title objects
3388          */
3389         public function getUsedTemplates() {
3390                 $result = array();
3391                 $id = $this->mTitle->getArticleID();
3392                 if( $id == 0 ) {
3393                         return array();
3394                 }
3395
3396                 $dbr = wfGetDB( DB_SLAVE );
3397                 $res = $dbr->select( array( 'templatelinks' ),
3398                         array( 'tl_namespace', 'tl_title' ),
3399                         array( 'tl_from' => $id ),
3400                         __METHOD__ );
3401                 if( false !== $res ) {
3402                         foreach( $res as $row ) {
3403                                 $result[] = Title::makeTitle( $row->tl_namespace, $row->tl_title );
3404                         }
3405                 }
3406                 $dbr->freeResult( $res );
3407                 return $result;
3408         }
3409
3410         /**
3411          * Returns a list of hidden categories this page is a member of.
3412          * Uses the page_props and categorylinks tables.
3413          *
3414          * @return array Array of Title objects
3415          */
3416         public function getHiddenCategories() {
3417                 $result = array();
3418                 $id = $this->mTitle->getArticleID();
3419                 if( $id == 0 ) {
3420                         return array();
3421                 }
3422
3423                 $dbr = wfGetDB( DB_SLAVE );
3424                 $res = $dbr->select( array( 'categorylinks', 'page_props', 'page' ),
3425                         array( 'cl_to' ),
3426                         array( 'cl_from' => $id, 'pp_page=page_id', 'pp_propname' => 'hiddencat',
3427                                 'page_namespace' => NS_CATEGORY, 'page_title=cl_to'),
3428                         __METHOD__ );
3429                 if ( false !== $res ) {
3430                         foreach( $res as $row ) {
3431                                 $result[] = Title::makeTitle( NS_CATEGORY, $row->cl_to );
3432                         }
3433                 }
3434                 $dbr->freeResult( $res );
3435                 return $result;
3436         }
3437
3438         /**
3439         * Return an applicable autosummary if one exists for the given edit.
3440         * @param string $oldtext The previous text of the page.
3441         * @param string $newtext The submitted text of the page.
3442         * @param bitmask $flags A bitmask of flags submitted for the edit.
3443         * @return string An appropriate autosummary, or an empty string.
3444         */
3445         public static function getAutosummary( $oldtext, $newtext, $flags ) {
3446                 # Decide what kind of autosummary is needed.
3447
3448                 # Redirect autosummaries
3449                 $ot = Title::newFromRedirect( $oldtext );
3450                 $rt = Title::newFromRedirect( $newtext );
3451                 if( is_object( $rt ) && ( !is_object( $ot ) || !$rt->equals( $ot ) || $ot->getFragment() != $rt->getFragment() ) ) {
3452                         return wfMsgForContent( 'autoredircomment', $rt->getFullText() );
3453                 }
3454
3455                 # New page autosummaries
3456                 if( $flags & EDIT_NEW && strlen( $newtext ) ) {
3457                         # If they're making a new article, give its text, truncated, in the summary.
3458                         global $wgContLang;
3459                         $truncatedtext = $wgContLang->truncate(
3460                                 str_replace("\n", ' ', $newtext),
3461                                 max( 0, 200 - strlen( wfMsgForContent( 'autosumm-new' ) ) ),
3462                                 '...' );
3463                         return wfMsgForContent( 'autosumm-new', $truncatedtext );
3464                 }
3465
3466                 # Blanking autosummaries
3467                 if( $oldtext != '' && $newtext == '' ) {
3468                         return wfMsgForContent( 'autosumm-blank' );
3469                 } elseif( strlen( $oldtext ) > 10 * strlen( $newtext ) && strlen( $newtext ) < 500) {
3470                         # Removing more than 90% of the article
3471                         global $wgContLang;
3472                         $truncatedtext = $wgContLang->truncate(
3473                                 $newtext,
3474                                 max( 0, 200 - strlen( wfMsgForContent( 'autosumm-replace' ) ) ),
3475                                 '...'
3476                         );
3477                         return wfMsgForContent( 'autosumm-replace', $truncatedtext );
3478                 }
3479
3480                 # If we reach this point, there's no applicable autosummary for our case, so our
3481                 # autosummary is empty.
3482                 return '';
3483         }
3484
3485         /**
3486          * Add the primary page-view wikitext to the output buffer
3487          * Saves the text into the parser cache if possible.
3488          * Updates templatelinks if it is out of date.
3489          *
3490          * @param string  $text
3491          * @param bool    $cache
3492          */
3493         public function outputWikiText( $text, $cache = true ) {
3494                 global $wgParser, $wgUser, $wgOut, $wgEnableParserCache, $wgUseFileCache;
3495
3496                 $popts = $wgOut->parserOptions();
3497                 $popts->setTidy(true);
3498                 $popts->enableLimitReport();
3499                 $parserOutput = $wgParser->parse( $text, $this->mTitle,
3500                         $popts, true, true, $this->getRevIdFetched() );
3501                 $popts->setTidy(false);
3502                 $popts->enableLimitReport( false );
3503                 if ( $wgEnableParserCache && $cache && $this && $parserOutput->getCacheTime() != -1 ) {
3504                         $parserCache = ParserCache::singleton();
3505                         $parserCache->save( $parserOutput, $this, $wgUser );
3506                 }
3507                 // Make sure file cache is not used on uncacheable content.
3508                 // Output that has magic words in it can still use the parser cache
3509                 // (if enabled), though it will generally expire sooner.
3510                 if( $parserOutput->getCacheTime() == -1 || $parserOutput->containsOldMagic() ) {
3511                         $wgUseFileCache = false;
3512                 }
3513
3514                 if ( $this->isCurrent() && !wfReadOnly() && $this->mTitle->areRestrictionsCascading() ) {
3515                         // templatelinks table may have become out of sync,
3516                         // especially if using variable-based transclusions.
3517                         // For paranoia, check if things have changed and if
3518                         // so apply updates to the database. This will ensure
3519                         // that cascaded protections apply as soon as the changes
3520                         // are visible.
3521
3522                         # Get templates from templatelinks
3523                         $id = $this->mTitle->getArticleID();
3524
3525                         $tlTemplates = array();
3526
3527                         $dbr = wfGetDB( DB_SLAVE );
3528                         $res = $dbr->select( array( 'templatelinks' ),
3529                                 array( 'tl_namespace', 'tl_title' ),
3530                                 array( 'tl_from' => $id ),
3531                                 __METHOD__ );
3532
3533                         global $wgContLang;
3534
3535                         if ( false !== $res ) {
3536                                 foreach( $res as $row ) {
3537                                         $tlTemplates[] = $wgContLang->getNsText( $row->tl_namespace ) . ':' . $row->tl_title ;
3538                                 }
3539                         }
3540
3541                         # Get templates from parser output.
3542                         $poTemplates_allns = $parserOutput->getTemplates();
3543
3544                         $poTemplates = array ();
3545                         foreach ( $poTemplates_allns as $ns_templates ) {
3546                                 $poTemplates = array_merge( $poTemplates, $ns_templates );
3547                         }
3548
3549                         # Get the diff
3550                         $templates_diff = array_diff( $poTemplates, $tlTemplates );
3551
3552                         if ( count( $templates_diff ) > 0 ) {
3553                                 # Whee, link updates time.
3554                                 $u = new LinksUpdate( $this->mTitle, $parserOutput );
3555                                 $u->doUpdate();
3556                         }
3557                 }
3558
3559                 $wgOut->addParserOutput( $parserOutput );
3560         }
3561
3562         /**
3563          * Update all the appropriate counts in the category table, given that
3564          * we've added the categories $added and deleted the categories $deleted.
3565          *
3566          * @param $added array   The names of categories that were added
3567          * @param $deleted array The names of categories that were deleted
3568          * @return null
3569          */
3570         public function updateCategoryCounts( $added, $deleted ) {
3571                 $ns = $this->mTitle->getNamespace();
3572                 $dbw = wfGetDB( DB_MASTER );
3573
3574                 # First make sure the rows exist.  If one of the "deleted" ones didn't
3575                 # exist, we might legitimately not create it, but it's simpler to just
3576                 # create it and then give it a negative value, since the value is bogus
3577                 # anyway.
3578                 #
3579                 # Sometimes I wish we had INSERT ... ON DUPLICATE KEY UPDATE.
3580                 $insertCats = array_merge( $added, $deleted );
3581                 if( !$insertCats ) {
3582                         # Okay, nothing to do
3583                         return;
3584                 }
3585                 $insertRows = array();
3586                 foreach( $insertCats as $cat ) {
3587                         $insertRows[] = array( 'cat_title' => $cat );
3588                 }
3589                 $dbw->insert( 'category', $insertRows, __METHOD__, 'IGNORE' );
3590
3591                 $addFields    = array( 'cat_pages = cat_pages + 1' );
3592                 $removeFields = array( 'cat_pages = cat_pages - 1' );
3593                 if( $ns == NS_CATEGORY ) {
3594                         $addFields[]    = 'cat_subcats = cat_subcats + 1';
3595                         $removeFields[] = 'cat_subcats = cat_subcats - 1';
3596                 } elseif( $ns == NS_IMAGE ) {
3597                         $addFields[]    = 'cat_files = cat_files + 1';
3598                         $removeFields[] = 'cat_files = cat_files - 1';
3599                 }
3600
3601                 if ( $added ) {
3602                         $dbw->update(
3603                                 'category',
3604                                 $addFields,
3605                                 array( 'cat_title' => $added ),
3606                                 __METHOD__
3607                         );
3608                 }
3609                 if ( $deleted ) {
3610                         $dbw->update(
3611                                 'category',
3612                                 $removeFields,
3613                                 array( 'cat_title' => $deleted ),
3614                                 __METHOD__
3615                         );
3616                 }
3617         }
3618 }