includes/Article.php

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