includes/Article.php

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