includes/Article.php

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