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