includes/Article.php

   1 <?php
   2 /**
   3  * File for articles
   4  */
   5
   6 /**
   7  * Class representing a MediaWiki article and history.
   8  *
   9  * See design.txt for an overview.
  10  * Note: edit user interface and cache support functions have been
  11  * moved to separate EditPage and HTMLFileCache classes.
  12  *
  13  */
  14 class Article {
  15         /**@{{
  16          * @private
  17          */
  18         var $mComment;                  //!<
  19         var $mContent;                  //!<
  20         var $mContentLoaded;    //!<
  21         var $mCounter;                  //!<
  22         var $mForUpdate;                //!<
  23         var $mGoodAdjustment;   //!<
  24         var $mLatest;                   //!<
  25         var $mMinorEdit;                //!<
  26         var $mOldId;                    //!<
  27         var $mRedirectedFrom;   //!<
  28         var $mRedirectUrl;              //!<
  29         var $mRevIdFetched;             //!<
  30         var $mRevision;                 //!<
  31         var $mTimestamp;                //!<
  32         var $mTitle;                    //!<
  33         var $mTotalAdjustment;  //!<
  34         var $mTouched;                  //!<
  35         var $mUser;                             //!<
  36         var $mUserText;                 //!<
  37         /**@}}*/
  38
  39         /**
  40          * Constructor and clear the article
  41          * @param $title Reference to a Title object.
  42          * @param $oldId Integer revision ID, null to fetch from request, zero for current
  43          */
  44         function __construct( &$title, $oldId = null ) {
  45                 $this->mTitle =& $title;
  46                 $this->mOldId = $oldId;
  47                 $this->clear();
  48         }
  49
  50         /**
  51          * Tell the page view functions that this view was redirected
  52          * from another page on the wiki.
  53          * @param $from Title object.
  54          */
  55         function setRedirectedFrom( $from ) {
  56                 $this->mRedirectedFrom = $from;
  57         }
  58
  59         /**
  60          * @return mixed false, Title of in-wiki target, or string with URL
  61          */
  62         function followRedirect() {
  63                 $text = $this->getContent();
  64                 $rt = Title::newFromRedirect( $text );
  65
  66                 # process if title object is valid and not special:userlogout
  67                 if( $rt ) {
  68                         if( $rt->getInterwiki() != '' ) {
  69                                 if( $rt->isLocal() ) {
  70                                         // Offsite wikis need an HTTP redirect.
  71                                         //
  72                                         // This can be hard to reverse and may produce loops,
  73                                         // so they may be disabled in the site configuration.
  74
  75                                         $source = $this->mTitle->getFullURL( 'redirect=no' );
  76                                         return $rt->getFullURL( 'rdfrom=' . urlencode( $source ) );
  77                                 }
  78                         } else {
  79                                 if( $rt->getNamespace() == NS_SPECIAL ) {
  80                                         // Gotta handle redirects to special pages differently:
  81                                         // Fill the HTTP response "Location" header and ignore
  82                                         // the rest of the page we're on.
  83                                         //
  84                                         // This can be hard to reverse, so they may be disabled.
  85
  86                                         if( $rt->isSpecial( 'Userlogout' ) ) {
  87                                                 // rolleyes
  88                                         } else {
  89                                                 return $rt->getFullURL();
  90                                         }
  91                                 }
  92                                 return $rt;
  93                         }
  94                 }
  95
  96                 // No or invalid redirect
  97                 return false;
  98         }
  99
 100         /**
 101          * get the title object of the article
 102          */
 103         function getTitle() {
 104                 return $this->mTitle;
 105         }
 106
 107         /**
 108           * Clear the object
 109           * @private
 110           */
 111         function clear() {
 112                 $this->mDataLoaded    = false;
 113                 $this->mContentLoaded = false;
 114
 115                 $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
 116                 $this->mRedirectedFrom = null; # Title object if set
 117                 $this->mUserText =
 118                 $this->mTimestamp = $this->mComment = '';
 119                 $this->mGoodAdjustment = $this->mTotalAdjustment = 0;
 120                 $this->mTouched = '19700101000000';
 121                 $this->mForUpdate = false;
 122                 $this->mIsRedirect = false;
 123                 $this->mRevIdFetched = 0;
 124                 $this->mRedirectUrl = false;
 125                 $this->mLatest = false;
 126         }
 127
 128         /**
 129          * Note that getContent/loadContent do not follow redirects anymore.
 130          * If you need to fetch redirectable content easily, try
 131          * the shortcut in Article::followContent()
 132          * FIXME
 133          * @todo There are still side-effects in this!
 134          *        In general, you should use the Revision class, not Article,
 135          *        to fetch text for purposes other than page views.
 136          *
 137          * @return Return the text of this revision
 138         */
 139         function getContent() {
 140                 global $wgUser, $wgOut;
 141
 142                 wfProfileIn( __METHOD__ );
 143
 144                 if ( 0 == $this->getID() ) {
 145                         wfProfileOut( __METHOD__ );
 146                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
 147
 148                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
 149                                 $ret = wfMsgWeirdKey ( $this->mTitle->getText() ) ;
 150                         } else {
 151                                 $ret = wfMsg( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon' );
 152                         }
 153
 154                         return "<div class='noarticletext'>$ret</div>";
 155                 } else {
 156                         $this->loadContent();
 157                         wfProfileOut( __METHOD__ );
 158                         return $this->mContent;
 159                 }
 160         }
 161
 162         /**
 163          * This function returns the text of a section, specified by a number ($section).
 164          * A section is text under a heading like == Heading == or \<h1\>Heading\</h1\>, or
 165          * the first section before any such heading (section 0).
 166          *
 167          * If a section contains subsections, these are also returned.
 168          *
 169          * @param $text String: text to look in
 170          * @param $section Integer: section number
 171          * @return string text of the requested section
 172          * @deprecated
 173          */
 174         function getSection($text,$section) {
 175                 global $wgParser;
 176                 return $wgParser->getSection( $text, $section );
 177         }
 178
 179         /**
 180          * @return int The oldid of the article that is to be shown, 0 for the
 181          *             current revision
 182          */
 183         function getOldID() {
 184                 if ( is_null( $this->mOldId ) ) {
 185                         $this->mOldId = $this->getOldIDFromRequest();
 186                 }
 187                 return $this->mOldId;
 188         }
 189
 190         /**
 191          * Sets $this->mRedirectUrl to a correct URL if the query parameters are incorrect
 192          *
 193          * @return int The old id for the request
 194          */
 195         function getOldIDFromRequest() {
 196                 global $wgRequest;
 197                 $this->mRedirectUrl = false;
 198                 $oldid = $wgRequest->getVal( 'oldid' );
 199                 if ( isset( $oldid ) ) {
 200                         $oldid = intval( $oldid );
 201                         if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 202                                 $nextid = $this->mTitle->getNextRevisionID( $oldid );
 203                                 if ( $nextid  ) {
 204                                         $oldid = $nextid;
 205                                 } else {
 206                                         $this->mRedirectUrl = $this->mTitle->getFullURL( 'redirect=no' );
 207                                 }
 208                         } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 209                                 $previd = $this->mTitle->getPreviousRevisionID( $oldid );
 210                                 if ( $previd ) {
 211                                         $oldid = $previd;
 212                                 } else {
 213                                         # TODO
 214                                 }
 215                         }
 216                         # unused:
 217                         # $lastid = $oldid;
 218                 }
 219
 220                 if ( !$oldid ) {
 221                         $oldid = 0;
 222                 }
 223                 return $oldid;
 224         }
 225
 226         /**
 227          * Load the revision (including text) into this object
 228          */
 229         function loadContent() {
 230                 if ( $this->mContentLoaded ) return;
 231
 232                 # Query variables :P
 233                 $oldid = $this->getOldID();
 234
 235                 # Pre-fill content with error message so that if something
 236                 # fails we'll have something telling us what we intended.
 237                 $this->mOldId = $oldid;
 238                 $this->fetchContent( $oldid );
 239         }
 240
 241
 242         /**
 243          * Fetch a page record with the given conditions
 244          * @param Database $dbr
 245          * @param array    $conditions
 246          * @private
 247          */
 248         function pageData( $dbr, $conditions ) {
 249                 $fields = array(
 250                                 'page_id',
 251                                 'page_namespace',
 252                                 'page_title',
 253                                 'page_restrictions',
 254                                 'page_counter',
 255                                 'page_is_redirect',
 256                                 'page_is_new',
 257                                 'page_random',
 258                                 'page_touched',
 259                                 'page_latest',
 260                                 'page_len' ) ;
 261                 wfRunHooks( 'ArticlePageDataBefore', array( &$this , &$fields ) )       ;
 262                 $row = $dbr->selectRow( 'page',
 263                         $fields,
 264                         $conditions,
 265                         'Article::pageData' );
 266                 wfRunHooks( 'ArticlePageDataAfter', array( &$this , &$row ) )   ;
 267                 return $row ;
 268         }
 269
 270         /**
 271          * @param Database $dbr
 272          * @param Title $title
 273          */
 274         function pageDataFromTitle( $dbr, $title ) {
 275                 return $this->pageData( $dbr, array(
 276                         'page_namespace' => $title->getNamespace(),
 277                         'page_title'     => $title->getDBkey() ) );
 278         }
 279
 280         /**
 281          * @param Database $dbr
 282          * @param int $id
 283          */
 284         function pageDataFromId( $dbr, $id ) {
 285                 return $this->pageData( $dbr, array( 'page_id' => $id ) );
 286         }
 287
 288         /**
 289          * Set the general counter, title etc data loaded from
 290          * some source.
 291          *
 292          * @param object $data
 293          * @private
 294          */
 295         function loadPageData( $data = 'fromdb' ) {
 296                 if ( $data === 'fromdb' ) {
 297                         $dbr = $this->getDB();
 298                         $data = $this->pageDataFromId( $dbr, $this->getId() );
 299                 }
 300
 301                 $lc =& LinkCache::singleton();
 302                 if ( $data ) {
 303                         $lc->addGoodLinkObj( $data->page_id, $this->mTitle );
 304
 305                         $this->mTitle->mArticleID = $data->page_id;
 306
 307                         # Old-fashioned restrictions.
 308                         $this->mTitle->loadRestrictions( $data->page_restrictions );
 309
 310                         $this->mCounter     = $data->page_counter;
 311                         $this->mTouched     = wfTimestamp( TS_MW, $data->page_touched );
 312                         $this->mIsRedirect  = $data->page_is_redirect;
 313                         $this->mLatest      = $data->page_latest;
 314                 } else {
 315                         if ( is_object( $this->mTitle ) ) {
 316                                 $lc->addBadLinkObj( $this->mTitle );
 317                         }
 318                         $this->mTitle->mArticleID = 0;
 319                 }
 320
 321                 $this->mDataLoaded  = true;
 322         }
 323
 324         /**
 325          * Get text of an article from database
 326          * Does *NOT* follow redirects.
 327          * @param int $oldid 0 for whatever the latest revision is
 328          * @return string
 329          */
 330         function fetchContent( $oldid = 0 ) {
 331                 if ( $this->mContentLoaded ) {
 332                         return $this->mContent;
 333                 }
 334
 335                 $dbr = $this->getDB();
 336
 337                 # Pre-fill content with error message so that if something
 338                 # fails we'll have something telling us what we intended.
 339                 $t = $this->mTitle->getPrefixedText();
 340                 if( $oldid ) {
 341                         $t .= ',oldid='.$oldid;
 342                 }
 343                 $this->mContent = wfMsg( 'missingarticle', $t ) ;
 344
 345                 if( $oldid ) {
 346                         $revision = Revision::newFromId( $oldid );
 347                         if( is_null( $revision ) ) {
 348                                 wfDebug( __METHOD__." failed to retrieve specified revision, id $oldid\n" );
 349                                 return false;
 350                         }
 351                         $data = $this->pageDataFromId( $dbr, $revision->getPage() );
 352                         if( !$data ) {
 353                                 wfDebug( __METHOD__." failed to get page data linked to revision id $oldid\n" );
 354                                 return false;
 355                         }
 356                         $this->mTitle = Title::makeTitle( $data->page_namespace, $data->page_title );
 357                         $this->loadPageData( $data );
 358                 } else {
 359                         if( !$this->mDataLoaded ) {
 360                                 $data = $this->pageDataFromTitle( $dbr, $this->mTitle );
 361                                 if( !$data ) {
 362                                         wfDebug( __METHOD__." failed to find page data for title " . $this->mTitle->getPrefixedText() . "\n" );
 363                                         return false;
 364                                 }
 365                                 $this->loadPageData( $data );
 366                         }
 367                         $revision = Revision::newFromId( $this->mLatest );
 368                         if( is_null( $revision ) ) {
 369                                 wfDebug( __METHOD__." failed to retrieve current page, rev_id {$data->page_latest}\n" );
 370                                 return false;
 371                         }
 372                 }
 373
 374                 // FIXME: Horrible, horrible! This content-loading interface just plain sucks.
 375                 // We should instead work with the Revision object when we need it...
 376                 $this->mContent = $revision->userCan( Revision::DELETED_TEXT ) ? $revision->getRawText() : "";
 377                 //$this->mContent   = $revision->getText();
 378
 379                 $this->mUser      = $revision->getUser();
 380                 $this->mUserText  = $revision->getUserText();
 381                 $this->mComment   = $revision->getComment();
 382                 $this->mTimestamp = wfTimestamp( TS_MW, $revision->getTimestamp() );
 383
 384                 $this->mRevIdFetched = $revision->getID();
 385                 $this->mContentLoaded = true;
 386                 $this->mRevision =& $revision;
 387
 388                 wfRunHooks( 'ArticleAfterFetchContent', array( &$this, &$this->mContent ) ) ;
 389
 390                 return $this->mContent;
 391         }
 392
 393         /**
 394          * Read/write accessor to select FOR UPDATE
 395          *
 396          * @param $x Mixed: FIXME
 397          */
 398         function forUpdate( $x = NULL ) {
 399                 return wfSetVar( $this->mForUpdate, $x );
 400         }
 401
 402         /**
 403          * Get the database which should be used for reads
 404          *
 405          * @return Database
 406          */
 407         function getDB() {
 408                 return wfGetDB( DB_MASTER );
 409         }
 410
 411         /**
 412          * Get options for all SELECT statements
 413          *
 414          * @param $options Array: an optional options array which'll be appended to
 415          *                       the default
 416          * @return Array: options
 417          */
 418         function getSelectOptions( $options = '' ) {
 419                 if ( $this->mForUpdate ) {
 420                         if ( is_array( $options ) ) {
 421                                 $options[] = 'FOR UPDATE';
 422                         } else {
 423                                 $options = 'FOR UPDATE';
 424                         }
 425                 }
 426                 return $options;
 427         }
 428
 429         /**
 430          * @return int Page ID
 431          */
 432         function getID() {
 433                 if( $this->mTitle ) {
 434                         return $this->mTitle->getArticleID();
 435                 } else {
 436                         return 0;
 437                 }
 438         }
 439
 440         /**
 441          * @return bool Whether or not the page exists in the database
 442          */
 443         function exists() {
 444                 return $this->getId() != 0;
 445         }
 446
 447         /**
 448          * @return int The view count for the page
 449          */
 450         function getCount() {
 451                 if ( -1 == $this->mCounter ) {
 452                         $id = $this->getID();
 453                         if ( $id == 0 ) {
 454                                 $this->mCounter = 0;
 455                         } else {
 456                                 $dbr = wfGetDB( DB_SLAVE );
 457                                 $this->mCounter = $dbr->selectField( 'page', 'page_counter', array( 'page_id' => $id ),
 458                                         'Article::getCount', $this->getSelectOptions() );
 459                         }
 460                 }
 461                 return $this->mCounter;
 462         }
 463
 464         /**
 465          * Determine whether a page  would be suitable for being counted as an
 466          * article in the site_stats table based on the title & its content
 467          *
 468          * @param $text String: text to analyze
 469          * @return bool
 470          */
 471         function isCountable( $text ) {
 472                 global $wgUseCommaCount;
 473
 474                 $token = $wgUseCommaCount ? ',' : '[[';
 475                 return
 476                         $this->mTitle->isContentPage()
 477                         && !$this->isRedirect( $text )
 478                         && in_string( $token, $text );
 479         }
 480
 481         /**
 482          * Tests if the article text represents a redirect
 483          *
 484          * @param $text String: FIXME
 485          * @return bool
 486          */
 487         function isRedirect( $text = false ) {
 488                 if ( $text === false ) {
 489                         $this->loadContent();
 490                         $titleObj = Title::newFromRedirect( $this->fetchContent() );
 491                 } else {
 492                         $titleObj = Title::newFromRedirect( $text );
 493                 }
 494                 return $titleObj !== NULL;
 495         }
 496
 497         /**
 498          * Returns true if the currently-referenced revision is the current edit
 499          * to this page (and it exists).
 500          * @return bool
 501          */
 502         function isCurrent() {
 503                 # If no oldid, this is the current version.
 504                 if ($this->getOldID() == 0)
 505                         return true;
 506
 507                 return $this->exists() &&
 508                         isset( $this->mRevision ) &&
 509                         $this->mRevision->isCurrent();
 510         }
 511
 512         /**
 513          * Loads everything except the text
 514          * This isn't necessary for all uses, so it's only done if needed.
 515          * @private
 516          */
 517         function loadLastEdit() {
 518                 if ( -1 != $this->mUser )
 519                         return;
 520
 521                 # New or non-existent articles have no user information
 522                 $id = $this->getID();
 523                 if ( 0 == $id ) return;
 524
 525                 $this->mLastRevision = Revision::loadFromPageId( $this->getDB(), $id );
 526                 if( !is_null( $this->mLastRevision ) ) {
 527                         $this->mUser      = $this->mLastRevision->getUser();
 528                         $this->mUserText  = $this->mLastRevision->getUserText();
 529                         $this->mTimestamp = $this->mLastRevision->getTimestamp();
 530                         $this->mComment   = $this->mLastRevision->getComment();
 531                         $this->mMinorEdit = $this->mLastRevision->isMinor();
 532                         $this->mRevIdFetched = $this->mLastRevision->getID();
 533                 }
 534         }
 535
 536         function getTimestamp() {
 537                 // Check if the field has been filled by ParserCache::get()
 538                 if ( !$this->mTimestamp ) {
 539                         $this->loadLastEdit();
 540                 }
 541                 return wfTimestamp(TS_MW, $this->mTimestamp);
 542         }
 543
 544         function getUser() {
 545                 $this->loadLastEdit();
 546                 return $this->mUser;
 547         }
 548
 549         function getUserText() {
 550                 $this->loadLastEdit();
 551                 return $this->mUserText;
 552         }
 553
 554         function getComment() {
 555                 $this->loadLastEdit();
 556                 return $this->mComment;
 557         }
 558
 559         function getMinorEdit() {
 560                 $this->loadLastEdit();
 561                 return $this->mMinorEdit;
 562         }
 563
 564         function getRevIdFetched() {
 565                 $this->loadLastEdit();
 566                 return $this->mRevIdFetched;
 567         }
 568
 569         /**
 570          * @todo Document, fixme $offset never used.
 571          * @param $limit Integer: default 0.
 572          * @param $offset Integer: default 0.
 573          */
 574         function getContributors($limit = 0, $offset = 0) {
 575                 # XXX: this is expensive; cache this info somewhere.
 576
 577                 $contribs = array();
 578                 $dbr = wfGetDB( DB_SLAVE );
 579                 $revTable = $dbr->tableName( 'revision' );
 580                 $userTable = $dbr->tableName( 'user' );
 581                 $user = $this->getUser();
 582                 $pageId = $this->getId();
 583
 584                 $sql = "SELECT rev_user, rev_user_text, user_real_name, MAX(rev_timestamp) as timestamp
 585                         FROM $revTable LEFT JOIN $userTable ON rev_user = user_id
 586                         WHERE rev_page = $pageId
 587                         AND rev_user != $user
 588                         GROUP BY rev_user, rev_user_text, user_real_name
 589                         ORDER BY timestamp DESC";
 590
 591                 if ($limit > 0) { $sql .= ' LIMIT '.$limit; }
 592                 $sql .= ' '. $this->getSelectOptions();
 593
 594                 $res = $dbr->query($sql, __METHOD__);
 595
 596                 while ( $line = $dbr->fetchObject( $res ) ) {
 597                         $contribs[] = array($line->rev_user, $line->rev_user_text, $line->user_real_name);
 598                 }
 599
 600                 $dbr->freeResult($res);
 601                 return $contribs;
 602         }
 603
 604         /**
 605          * This is the default action of the script: just view the page of
 606          * the given title.
 607         */
 608         function view() {
 609                 global $wgUser, $wgOut, $wgRequest, $wgContLang;
 610                 global $wgEnableParserCache, $wgStylePath, $wgUseRCPatrol, $wgParser;
 611                 global $wgUseTrackbacks, $wgNamespaceRobotPolicies;
 612                 $sk = $wgUser->getSkin();
 613
 614                 wfProfileIn( __METHOD__ );
 615
 616                 $parserCache =& ParserCache::singleton();
 617                 $ns = $this->mTitle->getNamespace(); # shortcut
 618
 619                 # Get variables from query string
 620                 $oldid = $this->getOldID();
 621
 622                 # getOldID may want us to redirect somewhere else
 623                 if ( $this->mRedirectUrl ) {
 624                         $wgOut->redirect( $this->mRedirectUrl );
 625                         wfProfileOut( __METHOD__ );
 626                         return;
 627                 }
 628
 629                 $diff = $wgRequest->getVal( 'diff' );
 630                 $rcid = $wgRequest->getVal( 'rcid' );
 631                 $rdfrom = $wgRequest->getVal( 'rdfrom' );
 632                 $diffOnly = $wgRequest->getBool( 'diffonly', $wgUser->getOption( 'diffonly' ) );
 633
 634                 $wgOut->setArticleFlag( true );
 635
 636                 # Discourage indexing of printable versions, but encourage following
 637                 if( $wgOut->isPrintable() ) {
 638                         $policy = 'noindex,follow';
 639                 } elseif( isset( $wgNamespaceRobotPolicies[$ns] ) ) {
 640                         # Honour customised robot policies for this namespace
 641                         $policy = $wgNamespaceRobotPolicies[$ns];
 642                 } else {
 643                         # Default to encourage indexing and following links
 644                         $policy = 'index,follow';
 645                 }
 646                 $wgOut->setRobotPolicy( $policy );
 647
 648                 # If we got diff and oldid in the query, we want to see a
 649                 # diff page instead of the article.
 650
 651                 if ( !is_null( $diff ) ) {
 652                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 653
 654                         $de = new DifferenceEngine( $this->mTitle, $oldid, $diff, $rcid );
 655                         // DifferenceEngine directly fetched the revision:
 656                         $this->mRevIdFetched = $de->mNewid;
 657                         $de->showDiffPage( $diffOnly );
 658
 659                         // Needed to get the page's current revision
 660                         $this->loadPageData();
 661                         if( $diff == 0 || $diff == $this->mLatest ) {
 662                                 # Run view updates for current revision only
 663                                 $this->viewUpdates();
 664                         }
 665                         wfProfileOut( __METHOD__ );
 666                         return;
 667                 }
 668
 669                 if ( empty( $oldid ) && $this->checkTouched() ) {
 670                         $wgOut->setETag($parserCache->getETag($this, $wgUser));
 671
 672                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 673                                 wfProfileOut( __METHOD__ );
 674                                 return;
 675                         } else if ( $this->tryFileCache() ) {
 676                                 # tell wgOut that output is taken care of
 677                                 $wgOut->disable();
 678                                 $this->viewUpdates();
 679                                 wfProfileOut( __METHOD__ );
 680                                 return;
 681                         }
 682                 }
 683
 684                 # Should the parser cache be used?
 685                 $pcache = $wgEnableParserCache &&
 686                         intval( $wgUser->getOption( 'stubthreshold' ) ) == 0 &&
 687                         $this->exists() &&
 688                         empty( $oldid );
 689                 wfDebug( 'Article::view using parser cache: ' . ($pcache ? 'yes' : 'no' ) . "\n" );
 690                 if ( $wgUser->getOption( 'stubthreshold' ) ) {
 691                         wfIncrStats( 'pcache_miss_stub' );
 692                 }
 693
 694                 $wasRedirected = false;
 695                 if ( isset( $this->mRedirectedFrom ) ) {
 696                         // This is an internally redirected page view.
 697                         // We'll need a backlink to the source page for navigation.
 698                         if ( wfRunHooks( 'ArticleViewRedirect', array( &$this ) ) ) {
 699                                 $sk = $wgUser->getSkin();
 700                                 $redir = $sk->makeKnownLinkObj( $this->mRedirectedFrom, '', 'redirect=no' );
 701                                 $s = wfMsg( 'redirectedfrom', $redir );
 702                                 $wgOut->setSubtitle( $s );
 703
 704                                 // Set the fragment if one was specified in the redirect
 705                                 if ( strval( $this->mTitle->getFragment() ) != '' ) {
 706                                         $fragment = Xml::escapeJsString( $this->mTitle->getFragmentForURL() );
 707                                         $wgOut->addInlineScript( "redirectToFragment(\"$fragment\");" );
 708                                 }
 709                                 $wasRedirected = true;
 710                         }
 711                 } elseif ( !empty( $rdfrom ) ) {
 712                         // This is an externally redirected view, from some other wiki.
 713                         // If it was reported from a trusted site, supply a backlink.
 714                         global $wgRedirectSources;
 715                         if( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 716                                 $sk = $wgUser->getSkin();
 717                                 $redir = $sk->makeExternalLink( $rdfrom, $rdfrom );
 718                                 $s = wfMsg( 'redirectedfrom', $redir );
 719                                 $wgOut->setSubtitle( $s );
 720                                 $wasRedirected = true;
 721                         }
 722                 }
 723
 724                 $outputDone = false;
 725                 wfRunHooks( 'ArticleViewHeader', array( &$this ) );
 726                 if ( $pcache ) {
 727                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 728                                 // Ensure that UI elements requiring revision ID have
 729                                 // the correct version information.
 730                                 $wgOut->setRevisionId( $this->mLatest );
 731                                 $outputDone = true;
 732                         }
 733                 }
 734                 if ( !$outputDone ) {
 735                         $text = $this->getContent();
 736                         if ( $text === false ) {
 737                                 # Failed to load, replace text with error message
 738                                 $t = $this->mTitle->getPrefixedText();
 739                                 if( $oldid ) {
 740                                         $t .= ',oldid='.$oldid;
 741                                         $text = wfMsg( 'missingarticle', $t );
 742                                 } else {
 743                                         $text = wfMsg( 'noarticletext', $t );
 744                                 }
 745                         }
 746
 747                         # Another whitelist check in case oldid is altering the title
 748                         if ( !$this->mTitle->userCanRead() ) {
 749                                 $wgOut->loginToUse();
 750                                 $wgOut->output();
 751                                 exit;
 752                         }
 753
 754                         # We're looking at an old revision
 755
 756                         if ( !empty( $oldid ) ) {
 757                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
 758                                 if( is_null( $this->mRevision ) ) {
 759                                         // FIXME: This would be a nice place to load the 'no such page' text.
 760                                 } else {
 761                                         $this->setOldSubtitle( isset($this->mOldId) ? $this->mOldId : $oldid );
 762                                         if( $this->mRevision->isDeleted( Revision::DELETED_TEXT ) ) {
 763                                                 if( !$this->mRevision->userCan( Revision::DELETED_TEXT ) ) {
 764                                                         $wgOut->addWikiText( wfMsg( 'rev-deleted-text-permission' ) );
 765                                                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 766                                                         return;
 767                                                 } else {
 768                                                         $wgOut->addWikiText( wfMsg( 'rev-deleted-text-view' ) );
 769                                                         // and we are allowed to see...
 770                                                 }
 771                                         }
 772                                 }
 773
 774                         }
 775                 }
 776                 if( !$outputDone ) {
 777                         $wgOut->setRevisionId( $this->getRevIdFetched() );
 778                         # wrap user css and user js in pre and don't parse
 779                         # XXX: use $this->mTitle->usCssJsSubpage() when php is fixed/ a workaround is found
 780                         if (
 781                                 $ns == NS_USER &&
 782                                 preg_match('/\\/[\\w]+\\.(?:css|js)$/', $this->mTitle->getDBkey())
 783                         ) {
 784                                 $wgOut->addWikiText( wfMsg('clearyourcache'));
 785                                 $wgOut->addHTML( '<pre>'.htmlspecialchars($this->mContent)."\n</pre>" );
 786                         } else if ( $rt = Title::newFromRedirect( $text ) ) {
 787                                 # Display redirect
 788                                 $imageDir = $wgContLang->isRTL() ? 'rtl' : 'ltr';
 789                                 $imageUrl = $wgStylePath.'/common/images/redirect' . $imageDir . '.png';
 790                                 # Don't overwrite the subtitle if this was an old revision
 791                                 if( !$wasRedirected && $this->isCurrent() ) {
 792                                         $wgOut->setSubtitle( wfMsgHtml( 'redirectpagesub' ) );
 793                                 }
 794                                 $link = $sk->makeLinkObj( $rt, $rt->getFullText() );
 795
 796                                 $wgOut->addHTML( '<img src="'.$imageUrl.'" alt="#REDIRECT " />' .
 797                                   '<span class="redirectText">'.$link.'</span>' );
 798
 799                                 $parseout = $wgParser->parse($text, $this->mTitle, ParserOptions::newFromUser($wgUser));
 800                                 $wgOut->addParserOutputNoText( $parseout );
 801                         } else if ( $pcache ) {
 802                                 # Display content and save to parser cache
 803                                 $this->outputWikiText( $text );
 804                         } else {
 805                                 # Display content, don't attempt to save to parser cache
 806                                 # Don't show section-edit links on old revisions... this way lies madness.
 807                                 if( !$this->isCurrent() ) {
 808                                         $oldEditSectionSetting = $wgOut->parserOptions()->setEditSection( false );
 809                                 }
 810                                 # Display content and don't save to parser cache
 811                                 # With timing hack -- TS 2006-07-26
 812                                 $time = -wfTime();
 813                                 $this->outputWikiText( $text, false );
 814                                 $time += wfTime();
 815
 816                                 # Timing hack
 817                                 if ( $time > 3 ) {
 818                                         wfDebugLog( 'slow-parse', sprintf( "%-5.2f %s", $time,
 819                                                 $this->mTitle->getPrefixedDBkey()));
 820                                 }
 821
 822                                 if( !$this->isCurrent() ) {
 823                                         $wgOut->parserOptions()->setEditSection( $oldEditSectionSetting );
 824                                 }
 825
 826                         }
 827                 }
 828                 /* title may have been set from the cache */
 829                 $t = $wgOut->getPageTitle();
 830                 if( empty( $t ) ) {
 831                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 832                 }
 833
 834                 # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 835                 if( $ns == NS_USER_TALK &&
 836                         User::isIP( $this->mTitle->getText() ) ) {
 837                         $wgOut->addWikiText( wfMsg('anontalkpagetext') );
 838                 }
 839
 840                 # If we have been passed an &rcid= parameter, we want to give the user a
 841                 # chance to mark this new article as patrolled.
 842                 if ( $wgUseRCPatrol && !is_null( $rcid ) && $rcid != 0 && $wgUser->isAllowed( 'patrol' ) ) {
 843                         $wgOut->addHTML(
 844                                 "<div class='patrollink'>" .
 845                                         wfMsgHtml( 'markaspatrolledlink',
 846                                         $sk->makeKnownLinkObj( $this->mTitle, wfMsgHtml('markaspatrolledtext'),
 847                                                 "action=markpatrolled&rcid=$rcid" )
 848                                         ) .
 849                                 '</div>'
 850                          );
 851                 }
 852
 853                 # Trackbacks
 854                 if ($wgUseTrackbacks)
 855                         $this->addTrackbacks();
 856
 857                 $this->viewUpdates();
 858                 wfProfileOut( __METHOD__ );
 859         }
 860
 861         function addTrackbacks() {
 862                 global $wgOut, $wgUser;
 863
 864                 $dbr = wfGetDB(DB_SLAVE);
 865                 $tbs = $dbr->select(
 866                                 /* FROM   */ 'trackbacks',
 867                                 /* SELECT */ array('tb_id', 'tb_title', 'tb_url', 'tb_ex', 'tb_name'),
 868                                 /* WHERE  */ array('tb_page' => $this->getID())
 869                 );
 870
 871                 if (!$dbr->numrows($tbs))
 872                         return;
 873
 874                 $tbtext = "";
 875                 while ($o = $dbr->fetchObject($tbs)) {
 876                         $rmvtxt = "";
 877                         if ($wgUser->isAllowed( 'trackback' )) {
 878                                 $delurl = $this->mTitle->getFullURL("action=deletetrackback&tbid="
 879                                                 . $o->tb_id . "&token=" . $wgUser->editToken());
 880                                 $rmvtxt = wfMsg('trackbackremove', $delurl);
 881                         }
 882                         $tbtext .= wfMsg(strlen($o->tb_ex) ? 'trackbackexcerpt' : 'trackback',
 883                                         $o->tb_title,
 884                                         $o->tb_url,
 885                                         $o->tb_ex,
 886                                         $o->tb_name,
 887                                         $rmvtxt);
 888                 }
 889                 $wgOut->addWikitext(wfMsg('trackbackbox', $tbtext));
 890         }
 891
 892         function deletetrackback() {
 893                 global $wgUser, $wgRequest, $wgOut, $wgTitle;
 894
 895                 if (!$wgUser->matchEditToken($wgRequest->getVal('token'))) {
 896                         $wgOut->addWikitext(wfMsg('sessionfailure'));
 897                         return;
 898                 }
 899
 900                 if ((!$wgUser->isAllowed('delete'))) {
 901                         $wgOut->permissionRequired( 'delete' );
 902                         return;
 903                 }
 904
 905                 if (wfReadOnly()) {
 906                         $wgOut->readOnlyPage();
 907                         return;
 908                 }
 909
 910                 $db = wfGetDB(DB_MASTER);
 911                 $db->delete('trackbacks', array('tb_id' => $wgRequest->getInt('tbid')));
 912                 $wgTitle->invalidateCache();
 913                 $wgOut->addWikiText(wfMsg('trackbackdeleteok'));
 914         }
 915
 916         function render() {
 917                 global $wgOut;
 918
 919                 $wgOut->setArticleBodyOnly(true);
 920                 $this->view();
 921         }
 922
 923         /**
 924          * Handle action=purge
 925          */
 926         function purge() {
 927                 global $wgUser, $wgRequest, $wgOut;
 928
 929                 if ( $wgUser->isAllowed( 'purge' ) || $wgRequest->wasPosted() ) {
 930                         if( wfRunHooks( 'ArticlePurge', array( &$this ) ) ) {
 931                                 $this->doPurge();
 932                         }
 933                 } else {
 934                         $msg = $wgOut->parse( wfMsg( 'confirm_purge' ) );
 935                         $action = $this->mTitle->escapeLocalURL( 'action=purge' );
 936                         $button = htmlspecialchars( wfMsg( 'confirm_purge_button' ) );
 937                         $msg = str_replace( '$1',
 938                                 "<form method=\"post\" action=\"$action\">\n" .
 939                                 "<input type=\"submit\" name=\"submit\" value=\"$button\" />\n" .
 940                                 "</form>\n", $msg );
 941
 942                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 943                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
 944                         $wgOut->addHTML( $msg );
 945                 }
 946         }
 947
 948         /**
 949          * Perform the actions of a page purging
 950          */
 951         function doPurge() {
 952                 global $wgUseSquid;
 953                 // Invalidate the cache
 954                 $this->mTitle->invalidateCache();
 955
 956                 if ( $wgUseSquid ) {
 957                         // Commit the transaction before the purge is sent
 958                         $dbw = wfGetDB( DB_MASTER );
 959                         $dbw->immediateCommit();
 960
 961                         // Send purge
 962                         $update = SquidUpdate::newSimplePurge( $this->mTitle );
 963                         $update->doUpdate();
 964                 }
 965                 $this->view();
 966         }
 967
 968         /**
 969          * Insert a new empty page record for this article.
 970          * This *must* be followed up by creating a revision
 971          * and running $this->updateToLatest( $rev_id );
 972          * or else the record will be left in a funky state.
 973          * Best if all done inside a transaction.
 974          *
 975          * @param Database $dbw
 976          * @return int     The newly created page_id key
 977          * @private
 978          */
 979         function insertOn( $dbw ) {
 980                 wfProfileIn( __METHOD__ );
 981
 982                 $page_id = $dbw->nextSequenceValue( 'page_page_id_seq' );
 983                 $dbw->insert( 'page', array(
 984                         'page_id'           => $page_id,
 985                         'page_namespace'    => $this->mTitle->getNamespace(),
 986                         'page_title'        => $this->mTitle->getDBkey(),
 987                         'page_counter'      => 0,
 988                         'page_restrictions' => '',
 989                         'page_is_redirect'  => 0, # Will set this shortly...
 990                         'page_is_new'       => 1,
 991                         'page_random'       => wfRandom(),
 992                         'page_touched'      => $dbw->timestamp(),
 993                         'page_latest'       => 0, # Fill this in shortly...
 994                         'page_len'          => 0, # Fill this in shortly...
 995                 ), __METHOD__ );
 996                 $newid = $dbw->insertId();
 997
 998                 $this->mTitle->resetArticleId( $newid );
 999
1000                 wfProfileOut( __METHOD__ );
1001                 return $newid;
1002         }
1003
1004         /**
1005          * Update the page record to point to a newly saved revision.
1006          *
1007          * @param Database $dbw
1008          * @param Revision $revision For ID number, and text used to set
1009                                      length and redirect status fields
1010          * @param int $lastRevision If given, will not overwrite the page field
1011          *                          when different from the currently set value.
1012          *                          Giving 0 indicates the new page flag should
1013          *                          be set on.
1014          * @param bool $lastRevIsRedirect If given, will optimize adding and
1015          *                                                      removing rows in redirect table.
1016          * @return bool true on success, false on failure
1017          * @private
1018          */
1019         function updateRevisionOn( &$dbw, $revision, $lastRevision = null, $lastRevIsRedirect = null ) {
1020                 wfProfileIn( __METHOD__ );
1021
1022                 $text = $revision->getText();
1023                 $rt = Title::newFromRedirect( $text );
1024
1025                 $conditions = array( 'page_id' => $this->getId() );
1026                 if( !is_null( $lastRevision ) ) {
1027                         # An extra check against threads stepping on each other
1028                         $conditions['page_latest'] = $lastRevision;
1029                 }
1030
1031                 $dbw->update( 'page',
1032                         array( /* SET */
1033                                 'page_latest'      => $revision->getId(),
1034                                 'page_touched'     => $dbw->timestamp(),
1035                                 'page_is_new'      => ($lastRevision === 0) ? 1 : 0,
1036                                 'page_is_redirect' => $rt !== NULL ? 1 : 0,
1037                                 'page_len'         => strlen( $text ),
1038                         ),
1039                         $conditions,
1040                         __METHOD__ );
1041
1042                 $result = $dbw->affectedRows() != 0;
1043
1044                 if ($result) {
1045                         // FIXME: Should the result from updateRedirectOn() be returned instead?
1046                         $this->updateRedirectOn( $dbw, $rt, $lastRevIsRedirect );
1047                 }
1048
1049                 wfProfileOut( __METHOD__ );
1050                 return $result;
1051         }
1052
1053         /**
1054          * Add row to the redirect table if this is a redirect, remove otherwise.
1055          *
1056          * @param Database $dbw
1057          * @param $redirectTitle a title object pointing to the redirect target,
1058          *                                                      or NULL if this is not a redirect
1059          * @param bool $lastRevIsRedirect If given, will optimize adding and
1060          *                                                      removing rows in redirect table.
1061          * @return bool true on success, false on failure
1062          * @private
1063          */
1064         function updateRedirectOn( &$dbw, $redirectTitle, $lastRevIsRedirect = null ) {
1065
1066                 // Always update redirects (target link might have changed)
1067                 // Update/Insert if we don't know if the last revision was a redirect or not
1068                 // Delete if changing from redirect to non-redirect
1069                 $isRedirect = !is_null($redirectTitle);
1070                 if ($isRedirect || is_null($lastRevIsRedirect) || $lastRevIsRedirect !== $isRedirect) {
1071
1072                         wfProfileIn( __METHOD__ );
1073
1074                         if ($isRedirect) {
1075
1076                                 // This title is a redirect, Add/Update row in the redirect table
1077                                 $set = array( /* SET */
1078                                         'rd_namespace' => $redirectTitle->getNamespace(),
1079                                         'rd_title'     => $redirectTitle->getDBkey(),
1080                                         'rd_from'      => $this->getId(),
1081                                 );
1082
1083                                 $dbw->replace( 'redirect', array( 'rd_from' ), $set, __METHOD__ );
1084                         } else {
1085                                 // This is not a redirect, remove row from redirect table
1086                                 $where = array( 'rd_from' => $this->getId() );
1087                                 $dbw->delete( 'redirect', $where, __METHOD__);
1088                         }
1089
1090                         wfProfileOut( __METHOD__ );
1091                         return ( $dbw->affectedRows() != 0 );
1092                 }
1093
1094                 return true;
1095         }
1096
1097         /**
1098          * If the given revision is newer than the currently set page_latest,
1099          * update the page record. Otherwise, do nothing.
1100          *
1101          * @param Database $dbw
1102          * @param Revision $revision
1103          */
1104         function updateIfNewerOn( &$dbw, $revision ) {
1105                 wfProfileIn( __METHOD__ );
1106
1107                 $row = $dbw->selectRow(
1108                         array( 'revision', 'page' ),
1109                         array( 'rev_id', 'rev_timestamp', 'page_is_redirect' ),
1110                         array(
1111                                 'page_id' => $this->getId(),
1112                                 'page_latest=rev_id' ),
1113                         __METHOD__ );
1114                 if( $row ) {
1115                         if( wfTimestamp(TS_MW, $row->rev_timestamp) >= $revision->getTimestamp() ) {
1116                                 wfProfileOut( __METHOD__ );
1117                                 return false;
1118                         }
1119                         $prev = $row->rev_id;
1120                         $lastRevIsRedirect = (bool)$row->page_is_redirect;
1121                 } else {
1122                         # No or missing previous revision; mark the page as new
1123                         $prev = 0;
1124                         $lastRevIsRedirect = null;
1125                 }
1126
1127                 $ret = $this->updateRevisionOn( $dbw, $revision, $prev, $lastRevIsRedirect );
1128                 wfProfileOut( __METHOD__ );
1129                 return $ret;
1130         }
1131
1132         /**
1133          * @return string Complete article text, or null if error
1134          */
1135         function replaceSection($section, $text, $summary = '', $edittime = NULL) {
1136                 wfProfileIn( __METHOD__ );
1137
1138                 if( $section == '' ) {
1139                         // Whole-page edit; let the text through unmolested.
1140                 } else {
1141                         if( is_null( $edittime ) ) {
1142                                 $rev = Revision::newFromTitle( $this->mTitle );
1143                         } else {
1144                                 $dbw = wfGetDB( DB_MASTER );
1145                                 $rev = Revision::loadFromTimestamp( $dbw, $this->mTitle, $edittime );
1146                         }
1147                         if( is_null( $rev ) ) {
1148                                 wfDebug( "Article::replaceSection asked for bogus section (page: " .
1149                                         $this->getId() . "; section: $section; edittime: $edittime)\n" );
1150                                 return null;
1151                         }
1152                         $oldtext = $rev->getText();
1153
1154                         if( $section == 'new' ) {
1155                                 # Inserting a new section
1156                                 $subject = $summary ? "== {$summary} ==\n\n" : '';
1157                                 $text = strlen( trim( $oldtext ) ) > 0
1158                                                 ? "{$oldtext}\n\n{$subject}{$text}"
1159                                                 : "{$subject}{$text}";
1160                         } else {
1161                                 # Replacing an existing section; roll out the big guns
1162                                 global $wgParser;
1163                                 $text = $wgParser->replaceSection( $oldtext, $section, $text );
1164                         }
1165
1166                 }
1167
1168                 wfProfileOut( __METHOD__ );
1169                 return $text;
1170         }
1171
1172         /**
1173          * @deprecated use Article::doEdit()
1174          */
1175         function insertNewArticle( $text, $summary, $isminor, $watchthis, $suppressRC=false, $comment=false ) {
1176                 $flags = EDIT_NEW | EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1177                         ( $isminor ? EDIT_MINOR : 0 ) |
1178                         ( $suppressRC ? EDIT_SUPPRESS_RC : 0 );
1179
1180                 # If this is a comment, add the summary as headline
1181                 if ( $comment && $summary != "" ) {
1182                         $text = "== {$summary} ==\n\n".$text;
1183                 }
1184
1185                 $this->doEdit( $text, $summary, $flags );
1186
1187                 $dbw = wfGetDB( DB_MASTER );
1188                 if ($watchthis) {
1189                         if (!$this->mTitle->userIsWatching()) {
1190                                 $dbw->begin();
1191                                 $this->doWatch();
1192                                 $dbw->commit();
1193                         }
1194                 } else {
1195                         if ( $this->mTitle->userIsWatching() ) {
1196                                 $dbw->begin();
1197                                 $this->doUnwatch();
1198                                 $dbw->commit();
1199                         }
1200                 }
1201                 $this->doRedirect( $this->isRedirect( $text ) );
1202         }
1203
1204         /**
1205          * @deprecated use Article::doEdit()
1206          */
1207         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
1208                 $flags = EDIT_UPDATE | EDIT_DEFER_UPDATES | EDIT_AUTOSUMMARY |
1209                         ( $minor ? EDIT_MINOR : 0 ) |
1210                         ( $forceBot ? EDIT_FORCE_BOT : 0 );
1211
1212                 $good = $this->doEdit( $text, $summary, $flags );
1213                 if ( $good ) {
1214                         $dbw = wfGetDB( DB_MASTER );
1215                         if ($watchthis) {
1216                                 if (!$this->mTitle->userIsWatching()) {
1217                                         $dbw->begin();
1218                                         $this->doWatch();
1219                                         $dbw->commit();
1220                                 }
1221                         } else {
1222                                 if ( $this->mTitle->userIsWatching() ) {
1223                                         $dbw->begin();
1224                                         $this->doUnwatch();
1225                                         $dbw->commit();
1226                                 }
1227                         }
1228
1229                         $this->doRedirect( $this->isRedirect( $text ), $sectionanchor );
1230                 }
1231                 return $good;
1232         }
1233
1234         /**
1235          * Article::doEdit()
1236          *
1237          * Change an existing article or create a new article. Updates RC and all necessary caches,
1238          * optionally via the deferred update array.
1239          *
1240          * $wgUser must be set before calling this function.
1241          *
1242          * @param string $text New text
1243          * @param string $summary Edit summary
1244          * @param integer $flags bitfield:
1245          *      EDIT_NEW
1246          *          Article is known or assumed to be non-existent, create a new one
1247          *      EDIT_UPDATE
1248          *          Article is known or assumed to be pre-existing, update it
1249          *      EDIT_MINOR
1250          *          Mark this edit minor, if the user is allowed to do so
1251          *      EDIT_SUPPRESS_RC
1252          *          Do not log the change in recentchanges
1253          *      EDIT_FORCE_BOT
1254          *          Mark the edit a "bot" edit regardless of user rights
1255          *      EDIT_DEFER_UPDATES
1256          *          Defer some of the updates until the end of index.php
1257          *      EDIT_AUTOSUMMARY
1258          *          Fill in blank summaries with generated text where possible
1259          *
1260          * If neither EDIT_NEW nor EDIT_UPDATE is specified, the status of the article will be detected.
1261          * If EDIT_UPDATE is specified and the article doesn't exist, the function will return false. If
1262          * EDIT_NEW is specified and the article does exist, a duplicate key error will cause an exception
1263          * to be thrown from the Database. These two conditions are also possible with auto-detection due
1264          * to MediaWiki's performance-optimised locking strategy.
1265          *
1266          * @return bool success
1267          */
1268         function doEdit( $text, $summary, $flags = 0 ) {
1269                 global $wgUser, $wgDBtransactions;
1270
1271                 wfProfileIn( __METHOD__ );
1272                 $good = true;
1273
1274                 if ( !($flags & EDIT_NEW) && !($flags & EDIT_UPDATE) ) {
1275                         $aid = $this->mTitle->getArticleID( GAID_FOR_UPDATE );
1276                         if ( $aid ) {
1277                                 $flags |= EDIT_UPDATE;
1278                         } else {
1279                                 $flags |= EDIT_NEW;
1280                         }
1281                 }
1282
1283                 if( !wfRunHooks( 'ArticleSave', array( &$this, &$wgUser, &$text,
1284                         &$summary, $flags & EDIT_MINOR,
1285                         null, null, &$flags ) ) )
1286                 {
1287                         wfDebug( __METHOD__ . ": ArticleSave hook aborted save!\n" );
1288                         wfProfileOut( __METHOD__ );
1289                         return false;
1290                 }
1291
1292                 # Silently ignore EDIT_MINOR if not allowed
1293                 $isminor = ( $flags & EDIT_MINOR ) && $wgUser->isAllowed('minoredit');
1294                 $bot = $wgUser->isAllowed( 'bot' ) || ( $flags & EDIT_FORCE_BOT );
1295
1296                 $oldtext = $this->getContent();
1297                 $oldsize = strlen( $oldtext );
1298
1299                 # Provide autosummaries if one is not provided.
1300                 if ($flags & EDIT_AUTOSUMMARY && $summary == '')
1301                         $summary = $this->getAutosummary( $oldtext, $text, $flags );
1302
1303                 $text = $this->preSaveTransform( $text );
1304                 $newsize = strlen( $text );
1305
1306                 $dbw = wfGetDB( DB_MASTER );
1307                 $now = wfTimestampNow();
1308
1309                 if ( $flags & EDIT_UPDATE ) {
1310                         # Update article, but only if changed.
1311
1312                         # Make sure the revision is either completely inserted or not inserted at all
1313                         if( !$wgDBtransactions ) {
1314                                 $userAbort = ignore_user_abort( true );
1315                         }
1316
1317                         $lastRevision = 0;
1318                         $revisionId = 0;
1319
1320                         if ( 0 != strcmp( $text, $oldtext ) ) {
1321                                 $this->mGoodAdjustment = (int)$this->isCountable( $text )
1322                                   - (int)$this->isCountable( $oldtext );
1323                                 $this->mTotalAdjustment = 0;
1324
1325                                 $lastRevision = $dbw->selectField(
1326                                         'page', 'page_latest', array( 'page_id' => $this->getId() ) );
1327
1328                                 if ( !$lastRevision ) {
1329                                         # Article gone missing
1330                                         wfDebug( __METHOD__.": EDIT_UPDATE specified but article doesn't exist\n" );
1331                                         wfProfileOut( __METHOD__ );
1332                                         return false;
1333                                 }
1334
1335                                 $revision = new Revision( array(
1336                                         'page'       => $this->getId(),
1337                                         'comment'    => $summary,
1338                                         'minor_edit' => $isminor,
1339                                         'text'       => $text
1340                                         ) );
1341
1342                                 $dbw->begin();
1343                                 $revisionId = $revision->insertOn( $dbw );
1344
1345                                 # Update page
1346                                 $ok = $this->updateRevisionOn( $dbw, $revision, $lastRevision );
1347
1348                                 if( !$ok ) {
1349                                         /* Belated edit conflict! Run away!! */
1350                                         $good = false;
1351                                         $dbw->rollback();
1352                                 } else {
1353                                         # Update recentchanges
1354                                         if( !( $flags & EDIT_SUPPRESS_RC ) ) {
1355                                                 $rcid = RecentChange::notifyEdit( $now, $this->mTitle, $isminor, $wgUser, $summary,
1356                                                         $lastRevision, $this->getTimestamp(), $bot, '', $oldsize, $newsize,
1357                                                         $revisionId );
1358
1359                                                 # Mark as patrolled if the user can do so
1360                                                 if( $GLOBALS['wgUseRCPatrol'] && $wgUser->isAllowed( 'autopatrol' ) ) {
1361                                                         RecentChange::markPatrolled( $rcid );
1362                                                         PatrolLog::record( $rcid, true );
1363                                                 }
1364                                         }
1365                                         $wgUser->incEditCount();
1366                                         $dbw->commit();
1367                                 }
1368                         } else {
1369                                 // Keep the same revision ID, but do some updates on it
1370                                 $revisionId = $this->getRevIdFetched();
1371                                 // Update page_touched, this is usually implicit in the page update
1372                                 // Other cache updates are done in onArticleEdit()
1373                                 $this->mTitle->invalidateCache();
1374                         }
1375
1376                         if( !$wgDBtransactions ) {
1377                                 ignore_user_abort( $userAbort );
1378                         }
1379
1380                         if ( $good ) {
1381                                 # Invalidate cache of this article and all pages using this article
1382                                 # as a template. Partly deferred.
1383                                 Article::onArticleEdit( $this->mTitle );
1384
1385                                 # Update links tables, site stats, etc.
1386                                 $changed = ( strcmp( $oldtext, $text ) != 0 );
1387                                 $this->editUpdates( $text, $summary, $isminor, $now, $revisionId, $changed );
1388                         }
1389                 } else {
1390                         # Create new article
1391
1392                         # Set statistics members
1393                         # We work out if it's countable after PST to avoid counter drift
1394                         # when articles are created with {{subst:}}
1395                         $this->mGoodAdjustment = (int)$this->isCountable( $text );
1396                         $this->mTotalAdjustment = 1;
1397
1398                         $dbw->begin();
1399
1400                         # Add the page record; stake our claim on this title!
1401                         # This will fail with a database query exception if the article already exists
1402                         $newid = $this->insertOn( $dbw );
1403
1404                         # Save the revision text...
1405                         $revision = new Revision( array(
1406                                 'page'       => $newid,
1407                                 'comment'    => $summary,
1408                                 'minor_edit' => $isminor,
1409                                 'text'       => $text
1410                                 ) );
1411                         $revisionId = $revision->insertOn( $dbw );
1412
1413                         $this->mTitle->resetArticleID( $newid );
1414
1415                         # Update the page record with revision data
1416                         $this->updateRevisionOn( $dbw, $revision, 0 );
1417
1418                         if( !( $flags & EDIT_SUPPRESS_RC ) ) {
1419                                 $rcid = RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary, $bot,
1420                                   '', strlen( $text ), $revisionId );
1421                                 # Mark as patrolled if the user can
1422                                 if( $GLOBALS['wgUseRCPatrol'] && $wgUser->isAllowed( 'autopatrol' ) ) {
1423                                         RecentChange::markPatrolled( $rcid );
1424                                         PatrolLog::record( $rcid, true );
1425                                 }
1426                         }
1427                         $wgUser->incEditCount();
1428                         $dbw->commit();
1429
1430                         # Update links, etc.
1431                         $this->editUpdates( $text, $summary, $isminor, $now, $revisionId, true );
1432
1433                         # Clear caches
1434                         Article::onArticleCreate( $this->mTitle );
1435
1436                         wfRunHooks( 'ArticleInsertComplete', array( &$this, &$wgUser, $text,
1437                                 $summary, $flags & EDIT_MINOR,
1438                                 null, null, &$flags ) );
1439                 }
1440
1441                 if ( $good && !( $flags & EDIT_DEFER_UPDATES ) ) {
1442                         wfDoUpdates();
1443                 }
1444
1445                 wfRunHooks( 'ArticleSaveComplete',
1446                         array( &$this, &$wgUser, $text,
1447                         $summary, $flags & EDIT_MINOR,
1448                         null, null, &$flags ) );
1449
1450                 wfProfileOut( __METHOD__ );
1451                 return $good;
1452         }
1453
1454         /**
1455          * @deprecated wrapper for doRedirect
1456          */
1457         function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid ) {
1458                 $this->doRedirect( $this->isRedirect( $text ), $sectionanchor );
1459         }
1460
1461         /**
1462          * Output a redirect back to the article.
1463          * This is typically used after an edit.
1464          *
1465          * @param boolean $noRedir Add redirect=no
1466          * @param string $sectionAnchor section to redirect to, including "#"
1467          */
1468         function doRedirect( $noRedir = false, $sectionAnchor = '' ) {
1469                 global $wgOut;
1470                 if ( $noRedir ) {
1471                         $query = 'redirect=no';
1472                 } else {
1473                         $query = '';
1474                 }
1475                 $wgOut->redirect( $this->mTitle->getFullURL( $query ) . $sectionAnchor );
1476         }
1477
1478         /**
1479          * Mark this particular edit as patrolled
1480          */
1481         function markpatrolled() {
1482                 global $wgOut, $wgRequest, $wgUseRCPatrol, $wgUser;
1483                 $wgOut->setRobotPolicy( 'noindex,nofollow' );
1484
1485                 # Check RC patrol config. option
1486                 if( !$wgUseRCPatrol ) {
1487                         $wgOut->errorPage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1488                         return;
1489                 }
1490
1491                 # Check permissions
1492                 if( !$wgUser->isAllowed( 'patrol' ) ) {
1493                         $wgOut->permissionRequired( 'patrol' );
1494                         return;
1495                 }
1496
1497                 # If we haven't been given an rc_id value, we can't do anything
1498                 $rcid = $wgRequest->getVal( 'rcid' );
1499                 if( !$rcid ) {
1500                         $wgOut->errorPage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1501                         return;
1502                 }
1503
1504                 # Handle the 'MarkPatrolled' hook
1505                 if( !wfRunHooks( 'MarkPatrolled', array( $rcid, &$wgUser, false ) ) ) {
1506                         return;
1507                 }
1508
1509                 $return = SpecialPage::getTitleFor( 'Recentchanges' );
1510                 # If it's left up to us, check that the user is allowed to patrol this edit
1511                 # If the user has the "autopatrol" right, then we'll assume there are no
1512                 # other conditions stopping them doing so
1513                 if( !$wgUser->isAllowed( 'autopatrol' ) ) {
1514                         $rc = RecentChange::newFromId( $rcid );
1515                         # Graceful error handling, as we've done before here...
1516                         # (If the recent change doesn't exist, then it doesn't matter whether
1517                         # the user is allowed to patrol it or not; nothing is going to happen
1518                         if( is_object( $rc ) && $wgUser->getName() == $rc->getAttribute( 'rc_user_text' ) ) {
1519                                 # The user made this edit, and can't patrol it
1520                                 # Tell them so, and then back off
1521                                 $wgOut->setPageTitle( wfMsg( 'markedaspatrollederror' ) );
1522                                 $wgOut->addWikiText( wfMsgNoTrans( 'markedaspatrollederror-noautopatrol' ) );
1523                                 $wgOut->returnToMain( false, $return );
1524                                 return;
1525                         }
1526                 }
1527
1528                 # Mark the edit as patrolled
1529                 RecentChange::markPatrolled( $rcid );
1530                 PatrolLog::record( $rcid );
1531                 wfRunHooks( 'MarkPatrolledComplete', array( &$rcid, &$wgUser, false ) );
1532
1533                 # Inform the user
1534                 $wgOut->setPageTitle( wfMsg( 'markedaspatrolled' ) );
1535                 $wgOut->addWikiText( wfMsgNoTrans( 'markedaspatrolledtext' ) );
1536                 $wgOut->returnToMain( false, $return );
1537         }
1538
1539         /**
1540          * User-interface handler for the "watch" action
1541          */
1542
1543         function watch() {
1544
1545                 global $wgUser, $wgOut;
1546
1547                 if ( $wgUser->isAnon() ) {
1548                         $wgOut->showErrorPage( 'watchnologin', 'watchnologintext' );
1549                         return;
1550                 }
1551                 if ( wfReadOnly() ) {
1552                         $wgOut->readOnlyPage();
1553                         return;
1554                 }
1555
1556                 if( $this->doWatch() ) {
1557                         $wgOut->setPagetitle( wfMsg( 'addedwatch' ) );
1558                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
1559
1560                         $link = wfEscapeWikiText( $this->mTitle->getPrefixedText() );
1561                         $text = wfMsg( 'addedwatchtext', $link );
1562                         $wgOut->addWikiText( $text );
1563                 }
1564
1565                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1566         }
1567
1568         /**
1569          * Add this page to $wgUser's watchlist
1570          * @return bool true on successful watch operation
1571          */
1572         function doWatch() {
1573                 global $wgUser;
1574                 if( $wgUser->isAnon() ) {
1575                         return false;
1576                 }
1577
1578                 if (wfRunHooks('WatchArticle', array(&$wgUser, &$this))) {
1579                         $wgUser->addWatch( $this->mTitle );
1580
1581                         return wfRunHooks('WatchArticleComplete', array(&$wgUser, &$this));
1582                 }
1583
1584                 return false;
1585         }
1586
1587         /**
1588          * User interface handler for the "unwatch" action.
1589          */
1590         function unwatch() {
1591
1592                 global $wgUser, $wgOut;
1593
1594                 if ( $wgUser->isAnon() ) {
1595                         $wgOut->showErrorPage( 'watchnologin', 'watchnologintext' );
1596                         return;
1597                 }
1598                 if ( wfReadOnly() ) {
1599                         $wgOut->readOnlyPage();
1600                         return;
1601                 }
1602
1603                 if( $this->doUnwatch() ) {
1604                         $wgOut->setPagetitle( wfMsg( 'removedwatch' ) );
1605                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
1606
1607                         $link = wfEscapeWikiText( $this->mTitle->getPrefixedText() );
1608                         $text = wfMsg( 'removedwatchtext', $link );
1609                         $wgOut->addWikiText( $text );
1610                 }
1611
1612                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1613         }
1614
1615         /**
1616          * Stop watching a page
1617          * @return bool true on successful unwatch
1618          */
1619         function doUnwatch() {
1620                 global $wgUser;
1621                 if( $wgUser->isAnon() ) {
1622                         return false;
1623                 }
1624
1625                 if (wfRunHooks('UnwatchArticle', array(&$wgUser, &$this))) {
1626                         $wgUser->removeWatch( $this->mTitle );
1627
1628                         return wfRunHooks('UnwatchArticleComplete', array(&$wgUser, &$this));
1629                 }
1630
1631                 return false;
1632         }
1633
1634         /**
1635          * action=protect handler
1636          */
1637         function protect() {
1638                 $form = new ProtectionForm( $this );
1639                 $form->execute();
1640         }
1641
1642         /**
1643          * action=unprotect handler (alias)
1644          */
1645         function unprotect() {
1646                 $this->protect();
1647         }
1648
1649         /**
1650          * Update the article's restriction field, and leave a log entry.
1651          *
1652          * @param array $limit set of restriction keys
1653          * @param string $reason
1654          * @return bool true on success
1655          */
1656         function updateRestrictions( $limit = array(), $reason = '', $cascade = 0, $expiry = null ) {
1657                 global $wgUser, $wgRestrictionTypes, $wgContLang;
1658
1659                 $id = $this->mTitle->getArticleID();
1660                 if( !$wgUser->isAllowed( 'protect' ) || wfReadOnly() || $id == 0 ) {
1661                         return false;
1662                 }
1663
1664                 if (!$cascade) {
1665                         $cascade = false;
1666                 }
1667
1668                 // Take this opportunity to purge out expired restrictions
1669                 Title::purgeExpiredRestrictions();
1670
1671                 # FIXME: Same limitations as described in ProtectionForm.php (line 37);
1672                 # we expect a single selection, but the schema allows otherwise.
1673                 $current = array();
1674                 foreach( $wgRestrictionTypes as $action )
1675                         $current[$action] = implode( '', $this->mTitle->getRestrictions( $action ) );
1676
1677                 $current = Article::flattenRestrictions( $current );
1678                 $updated = Article::flattenRestrictions( $limit );
1679
1680                 $changed = ( $current != $updated );
1681                 $changed = $changed || ($this->mTitle->areRestrictionsCascading() != $cascade);
1682                 $changed = $changed || ($this->mTitle->mRestrictionsExpiry != $expiry);
1683                 $protect = ( $updated != '' );
1684
1685                 # If nothing's changed, do nothing
1686                 if( $changed ) {
1687                         global $wgGroupPermissions;
1688                         if( wfRunHooks( 'ArticleProtect', array( &$this, &$wgUser, $limit, $reason ) ) ) {
1689
1690                                 $dbw = wfGetDB( DB_MASTER );
1691
1692                                 $encodedExpiry = Block::encodeExpiry($expiry, $dbw );
1693
1694                                 $expiry_description = '';
1695                                 if ( $encodedExpiry != 'infinity' ) {
1696                                         $expiry_description = ' (' . wfMsgForContent( 'protect-expiring', $wgContLang->timeanddate( $expiry ) ).')';
1697                                 }
1698
1699                                 # Prepare a null revision to be added to the history
1700                                 $comment = $wgContLang->ucfirst( wfMsgForContent( $protect ? 'protectedarticle' : 'unprotectedarticle', $this->mTitle->getPrefixedText() ) );
1701
1702                                 foreach( $limit as $action => $restrictions ) {
1703                                         # Check if the group level required to edit also can protect pages
1704                                         # Otherwise, people who cannot normally protect can "protect" pages via transclusion
1705                                         $cascade = ( $cascade && isset($wgGroupPermissions[$restrictions]['protect']) && $wgGroupPermissions[$restrictions]['protect'] );
1706                                 }
1707
1708                                 $cascade_description = '';
1709                                 if ($cascade) {
1710                                         $cascade_description = ' ['.wfMsg('protect-summary-cascade').']';
1711                                 }
1712
1713                                 if( $reason )
1714                                         $comment .= ": $reason";
1715                                 if( $protect )
1716                                         $comment .= " [$updated]";
1717                                 if ( $expiry_description && $protect )
1718                                         $comment .= "$expiry_description";
1719                                 if ( $cascade )
1720                                         $comment .= "$cascade_description";
1721
1722                                 $nullRevision = Revision::newNullRevision( $dbw, $id, $comment, true );
1723                                 $nullRevId = $nullRevision->insertOn( $dbw );
1724
1725                                 # Update restrictions table
1726                                 foreach( $limit as $action => $restrictions ) {
1727                                         if ($restrictions != '' ) {
1728                                                 $dbw->replace( 'page_restrictions', array(array('pr_page', 'pr_type')),
1729                                                         array( 'pr_page' => $id, 'pr_type' => $action
1730                                                                 , 'pr_level' => $restrictions, 'pr_cascade' => $cascade ? 1 : 0
1731                                                                 , 'pr_expiry' => $encodedExpiry ), __METHOD__  );
1732                                         } else {
1733                                                 $dbw->delete( 'page_restrictions', array( 'pr_page' => $id,
1734                                                         'pr_type' => $action ), __METHOD__ );
1735                                         }
1736                                 }
1737
1738                                 # Update page record
1739                                 $dbw->update( 'page',
1740                                         array( /* SET */
1741                                                 'page_touched' => $dbw->timestamp(),
1742                                                 'page_restrictions' => '',
1743                                                 'page_latest' => $nullRevId
1744                                         ), array( /* WHERE */
1745                                                 'page_id' => $id
1746                                         ), 'Article::protect'
1747                                 );
1748                                 wfRunHooks( 'ArticleProtectComplete', array( &$this, &$wgUser, $limit, $reason ) );
1749
1750                                 # Update the protection log
1751                                 $log = new LogPage( 'protect' );
1752
1753                                 if( $protect ) {
1754                                         $log->addEntry( 'protect', $this->mTitle, trim( $reason . " [$updated]$cascade_description$expiry_description" ) );
1755                                 } else {
1756                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1757                                 }
1758
1759                         } # End hook
1760                 } # End "changed" check
1761
1762                 return true;
1763         }
1764
1765         /**
1766          * Take an array of page restrictions and flatten it to a string
1767          * suitable for insertion into the page_restrictions field.
1768          * @param array $limit
1769          * @return string
1770          * @private
1771          */
1772         function flattenRestrictions( $limit ) {
1773                 if( !is_array( $limit ) ) {
1774                         throw new MWException( 'Article::flattenRestrictions given non-array restriction set' );
1775                 }
1776                 $bits = array();
1777                 ksort( $limit );
1778                 foreach( $limit as $action => $restrictions ) {
1779                         if( $restrictions != '' ) {
1780                                 $bits[] = "$action=$restrictions";
1781                         }
1782                 }
1783                 return implode( ':', $bits );
1784         }
1785
1786         /*
1787          * UI entry point for page deletion
1788          */
1789         function delete() {
1790                 global $wgUser, $wgOut, $wgRequest;
1791                 $confirm = $wgRequest->wasPosted() &&
1792                         $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
1793                 $reason = $wgRequest->getText( 'wpReason' );
1794
1795                 # This code desperately needs to be totally rewritten
1796
1797                 # Check permissions
1798                 if( $wgUser->isAllowed( 'delete' ) ) {
1799                         if( $wgUser->isBlocked( !$confirm ) ) {
1800                                 $wgOut->blockedPage();
1801                                 return;
1802                         }
1803                 } else {
1804                         $wgOut->permissionRequired( 'delete' );
1805                         return;
1806                 }
1807
1808                 if( wfReadOnly() ) {
1809                         $wgOut->readOnlyPage();
1810                         return;
1811                 }
1812
1813                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1814
1815                 # Better double-check that it hasn't been deleted yet!
1816                 $dbw = wfGetDB( DB_MASTER );
1817                 $conds = $this->mTitle->pageCond();
1818                 $latest = $dbw->selectField( 'page', 'page_latest', $conds, __METHOD__ );
1819                 if ( $latest === false ) {
1820                         $wgOut->showFatalError( wfMsg( 'cannotdelete' ) );
1821                         return;
1822                 }
1823
1824                 if( $confirm ) {
1825                         $this->doDelete( $reason );
1826                         if( $wgRequest->getCheck( 'wpWatch' ) ) {
1827                                 $this->doWatch();
1828                         } elseif( $this->mTitle->userIsWatching() ) {
1829                                 $this->doUnwatch();
1830                         }
1831                         return;
1832                 }
1833
1834                 # determine whether this page has earlier revisions
1835                 # and insert a warning if it does
1836                 $maxRevisions = 20;
1837                 $authors = $this->getLastNAuthors( $maxRevisions, $latest );
1838
1839                 if( count( $authors ) > 1 && !$confirm ) {
1840                         $skin=$wgUser->getSkin();
1841                         $wgOut->addHTML( '<strong>' . wfMsg( 'historywarning' ) . ' ' . $skin->historyLink() . '</strong>' );
1842                 }
1843
1844                 # If a single user is responsible for all revisions, find out who they are
1845                 if ( count( $authors ) == $maxRevisions ) {
1846                         // Query bailed out, too many revisions to find out if they're all the same
1847                         $authorOfAll = false;
1848                 } else {
1849                         $authorOfAll = reset( $authors );
1850                         foreach ( $authors as $author ) {
1851                                 if ( $authorOfAll != $author ) {
1852                                         $authorOfAll = false;
1853                                         break;
1854                                 }
1855                         }
1856                 }
1857                 # Fetch article text
1858                 $rev = Revision::newFromTitle( $this->mTitle );
1859
1860                 if( !is_null( $rev ) ) {
1861                         # if this is a mini-text, we can paste part of it into the deletion reason
1862                         $text = $rev->getText();
1863
1864                         #if this is empty, an earlier revision may contain "useful" text
1865                         $blanked = false;
1866                         if( $text == '' ) {
1867                                 $prev = $rev->getPrevious();
1868                                 if( $prev ) {
1869                                         $text = $prev->getText();
1870                                         $blanked = true;
1871                                 }
1872                         }
1873
1874                         $length = strlen( $text );
1875
1876                         # this should not happen, since it is not possible to store an empty, new
1877                         # page. Let's insert a standard text in case it does, though
1878                         if( $length == 0 && $reason === '' ) {
1879                                 $reason = wfMsgForContent( 'exblank' );
1880                         }
1881
1882                         if( $reason === '' ) {
1883                                 # comment field=255, let's grep the first 150 to have some user
1884                                 # space left
1885                                 global $wgContLang;
1886                                 $text = $wgContLang->truncate( $text, 150, '...' );
1887
1888                                 # let's strip out newlines
1889                                 $text = preg_replace( "/[\n\r]/", '', $text );
1890
1891                                 if( !$blanked ) {
1892                                         if( $authorOfAll === false ) {
1893                                                 $reason = wfMsgForContent( 'excontent', $text );
1894                                         } else {
1895                                                 $reason = wfMsgForContent( 'excontentauthor', $text, $authorOfAll );
1896                                         }
1897                                 } else {
1898                                         $reason = wfMsgForContent( 'exbeforeblank', $text );
1899                                 }
1900                         }
1901                 }
1902
1903                 return $this->confirmDelete( '', $reason );
1904         }
1905
1906         /**
1907          * Get the last N authors
1908          * @param int $num Number of revisions to get
1909          * @param string $revLatest The latest rev_id, selected from the master (optional)
1910          * @return array Array of authors, duplicates not removed
1911          */
1912         function getLastNAuthors( $num, $revLatest = 0 ) {
1913                 wfProfileIn( __METHOD__ );
1914
1915                 // First try the slave
1916                 // If that doesn't have the latest revision, try the master
1917                 $continue = 2;
1918                 $db = wfGetDB( DB_SLAVE );
1919                 do {
1920                         $res = $db->select( array( 'page', 'revision' ),
1921                                 array( 'rev_id', 'rev_user_text' ),
1922                                 array(
1923                                         'page_namespace' => $this->mTitle->getNamespace(),
1924                                         'page_title' => $this->mTitle->getDBkey(),
1925                                         'rev_page = page_id'
1926                                 ), __METHOD__, $this->getSelectOptions( array(
1927                                         'ORDER BY' => 'rev_timestamp DESC',
1928                                         'LIMIT' => $num
1929                                 ) )
1930                         );
1931                         if ( !$res ) {
1932                                 wfProfileOut( __METHOD__ );
1933                                 return array();
1934                         }
1935                         $row = $db->fetchObject( $res );
1936                         if ( $continue == 2 && $revLatest && $row->rev_id != $revLatest ) {
1937                                 $db = wfGetDB( DB_MASTER );
1938                                 $continue--;
1939                         } else {
1940                                 $continue = 0;
1941                         }
1942                 } while ( $continue );
1943
1944                 $authors = array( $row->rev_user_text );
1945                 while ( $row = $db->fetchObject( $res ) ) {
1946                         $authors[] = $row->rev_user_text;
1947                 }
1948                 wfProfileOut( __METHOD__ );
1949                 return $authors;
1950         }
1951
1952         /**
1953          * Output deletion confirmation dialog
1954          */
1955         function confirmDelete( $par, $reason ) {
1956                 global $wgOut, $wgUser;
1957
1958                 wfDebug( "Article::confirmDelete\n" );
1959
1960                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1961                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1962                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1963                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1964
1965                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1966
1967                 $confirm = htmlspecialchars( wfMsg( 'deletepage' ) );
1968                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1969                 $token = htmlspecialchars( $wgUser->editToken() );
1970                 $watch = Xml::checkLabel( wfMsg( 'watchthis' ), 'wpWatch', 'wpWatch', $wgUser->getBoolOption( 'watchdeletion' ) || $this->mTitle->userIsWatching(), array( 'tabindex' => '2' ) );
1971
1972                 $wgOut->addHTML( "
1973 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1974         <table border='0'>
1975                 <tr>
1976                         <td align='right'>
1977                                 <label for='wpReason'>{$delcom}:</label>
1978                         </td>
1979                         <td align='left'>
1980                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" tabindex=\"1\" />
1981                         </td>
1982                 </tr>
1983                 <tr>
1984                         <td>&nbsp;</td>
1985                         <td>$watch</td>
1986                 </tr>
1987                 <tr>
1988                         <td>&nbsp;</td>
1989                         <td>
1990                                 <input type='submit' name='wpConfirmB' id='wpConfirmB' value=\"{$confirm}\" tabindex=\"3\" />
1991                         </td>
1992                 </tr>
1993         </table>
1994         <input type='hidden' name='wpEditToken' value=\"{$token}\" />
1995 </form>\n" );
1996
1997                 $wgOut->returnToMain( false );
1998
1999                 $this->showLogExtract( $wgOut );
2000         }
2001
2002
2003         /**
2004          * Fetch deletion log
2005          */
2006         function showLogExtract( &$out ) {
2007                 # Show relevant lines from the deletion log:
2008                 $out->addHTML( "<h2>" . htmlspecialchars( LogPage::logName( 'delete' ) ) . "</h2>\n" );
2009                 $logViewer = new LogViewer(
2010                         new LogReader(
2011                                 new FauxRequest(
2012                                         array( 'page' => $this->mTitle->getPrefixedText(),
2013                                                'type' => 'delete' ) ) ) );
2014                 $logViewer->showList( $out );
2015         }
2016
2017
2018         /**
2019          * Perform a deletion and output success or failure messages
2020          */
2021         function doDelete( $reason ) {
2022                 global $wgOut, $wgUser;
2023                 wfDebug( __METHOD__."\n" );
2024
2025                 if (wfRunHooks('ArticleDelete', array(&$this, &$wgUser, &$reason))) {
2026                         if ( $this->doDeleteArticle( $reason ) ) {
2027                                 $deleted = wfEscapeWikiText( $this->mTitle->getPrefixedText() );
2028
2029                                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
2030                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
2031
2032                                 $loglink = '[[Special:Log/delete|' . wfMsg( 'deletionlog' ) . ']]';
2033                                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
2034
2035                                 $wgOut->addWikiText( $text );
2036                                 $wgOut->returnToMain( false );
2037                                 wfRunHooks('ArticleDeleteComplete', array(&$this, &$wgUser, $reason));
2038                         } else {
2039                                 $wgOut->showFatalError( wfMsg( 'cannotdelete' ) );
2040                         }
2041                 }
2042         }
2043
2044         /**
2045          * Back-end article deletion
2046          * Deletes the article with database consistency, writes logs, purges caches
2047          * Returns success
2048          */
2049         function doDeleteArticle( $reason ) {
2050                 global $wgUseSquid, $wgDeferredUpdateList;
2051                 global $wgUseTrackbacks;
2052
2053                 wfDebug( __METHOD__."\n" );
2054
2055                 $dbw = wfGetDB( DB_MASTER );
2056                 $ns = $this->mTitle->getNamespace();
2057                 $t = $this->mTitle->getDBkey();
2058                 $id = $this->mTitle->getArticleID();
2059
2060                 if ( $t == '' || $id == 0 ) {
2061                         return false;
2062                 }
2063
2064                 $u = new SiteStatsUpdate( 0, 1, -(int)$this->isCountable( $this->getContent() ), -1 );
2065                 array_push( $wgDeferredUpdateList, $u );
2066
2067                 // For now, shunt the revision data into the archive table.
2068                 // Text is *not* removed from the text table; bulk storage
2069                 // is left intact to avoid breaking block-compression or
2070                 // immutable storage schemes.
2071                 //
2072                 // For backwards compatibility, note that some older archive
2073                 // table entries will have ar_text and ar_flags fields still.
2074                 //
2075                 // In the future, we may keep revisions and mark them with
2076                 // the rev_deleted field, which is reserved for this purpose.
2077                 $dbw->insertSelect( 'archive', array( 'page', 'revision' ),
2078                         array(
2079                                 'ar_namespace'  => 'page_namespace',
2080                                 'ar_title'      => 'page_title',
2081                                 'ar_comment'    => 'rev_comment',
2082                                 'ar_user'       => 'rev_user',
2083                                 'ar_user_text'  => 'rev_user_text',
2084                                 'ar_timestamp'  => 'rev_timestamp',
2085                                 'ar_minor_edit' => 'rev_minor_edit',
2086                                 'ar_rev_id'     => 'rev_id',
2087                                 'ar_text_id'    => 'rev_text_id',
2088                                 'ar_text'       => '\'\'', // Be explicit to appease
2089                                 'ar_flags'      => '\'\'', // MySQL's "strict mode"...
2090                                 'ar_len'                => 'rev_len'
2091                         ), array(
2092                                 'page_id' => $id,
2093                                 'page_id = rev_page'
2094                         ), __METHOD__
2095                 );
2096
2097                 # Delete restrictions for it
2098                 $dbw->delete( 'page_restrictions', array ( 'pr_page' => $id ), __METHOD__ );
2099
2100                 # Now that it's safely backed up, delete it
2101                 $dbw->delete( 'page', array( 'page_id' => $id ), __METHOD__);
2102
2103                 # If using cascading deletes, we can skip some explicit deletes
2104                 if ( !$dbw->cascadingDeletes() ) {
2105
2106                         $dbw->delete( 'revision', array( 'rev_page' => $id ), __METHOD__ );
2107
2108                         if ($wgUseTrackbacks)
2109                                 $dbw->delete( 'trackbacks', array( 'tb_page' => $id ), __METHOD__ );
2110
2111                         # Delete outgoing links
2112                         $dbw->delete( 'pagelinks', array( 'pl_from' => $id ) );
2113                         $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
2114                         $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
2115                         $dbw->delete( 'templatelinks', array( 'tl_from' => $id ) );
2116                         $dbw->delete( 'externallinks', array( 'el_from' => $id ) );
2117                         $dbw->delete( 'langlinks', array( 'll_from' => $id ) );
2118                         $dbw->delete( 'redirect', array( 'rd_from' => $id ) );
2119                 }
2120
2121                 # If using cleanup triggers, we can skip some manual deletes
2122                 if ( !$dbw->cleanupTriggers() ) {
2123
2124                         # Clean up recentchanges entries...
2125                         $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), __METHOD__ );
2126                 }
2127
2128                 # Clear caches
2129                 Article::onArticleDelete( $this->mTitle );
2130
2131                 # Log the deletion
2132                 $log = new LogPage( 'delete' );
2133                 $log->addEntry( 'delete', $this->mTitle, $reason );
2134
2135                 # Clear the cached article id so the interface doesn't act like we exist
2136                 $this->mTitle->resetArticleID( 0 );
2137                 $this->mTitle->mArticleID = 0;
2138                 return true;
2139         }
2140
2141         /**
2142          * Revert a modification
2143          */
2144         function rollback() {
2145                 global $wgUser, $wgOut, $wgRequest, $wgUseRCPatrol;
2146
2147                 if( $wgUser->isAllowed( 'rollback' ) ) {
2148                         if( $wgUser->isBlocked() ) {
2149                                 $wgOut->blockedPage();
2150                                 return;
2151                         }
2152                 } else {
2153                         $wgOut->permissionRequired( 'rollback' );
2154                         return;
2155                 }
2156
2157                 if ( wfReadOnly() ) {
2158                         $wgOut->readOnlyPage( $this->getContent() );
2159                         return;
2160                 }
2161                 if( !$wgUser->matchEditToken( $wgRequest->getVal( 'token' ),
2162                         array( $this->mTitle->getPrefixedText(),
2163                                 $wgRequest->getVal( 'from' ) )  ) ) {
2164                         $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
2165                         $wgOut->addWikiText( wfMsg( 'sessionfailure' ) );
2166                         return;
2167                 }
2168                 $dbw = wfGetDB( DB_MASTER );
2169
2170                 # Enhanced rollback, marks edits rc_bot=1
2171                 $bot = $wgRequest->getBool( 'bot' );
2172
2173                 # Replace all this user's current edits with the next one down
2174
2175                 # Get the last editor
2176                 $current = Revision::newFromTitle( $this->mTitle );
2177                 if( is_null( $current ) ) {
2178                         # Something wrong... no page?
2179                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
2180                         return;
2181                 }
2182
2183                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
2184                 if( $from != $current->getUserText() ) {
2185                         $wgOut->setPageTitle( wfMsg('rollbackfailed') );
2186                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
2187                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
2188                                 htmlspecialchars( $from ),
2189                                 htmlspecialchars( $current->getUserText() ) ) );
2190                         if( $current->getComment() != '') {
2191                                 $wgOut->addHTML(
2192                                         wfMsg( 'editcomment',
2193                                         $wgUser->getSkin()->formatComment( $current->getComment() ) ) );
2194                         }
2195                         return;
2196                 }
2197
2198                 # Get the last edit not by this guy
2199                 $user = intval( $current->getUser() );
2200                 $user_text = $dbw->addQuotes( $current->getUserText() );
2201                 $s = $dbw->selectRow( 'revision',
2202                         array( 'rev_id', 'rev_timestamp' ),
2203                         array(
2204                                 'rev_page' => $current->getPage(),
2205                                 "rev_user <> {$user} OR rev_user_text <> {$user_text}"
2206                         ), __METHOD__,
2207                         array(
2208                                 'USE INDEX' => 'page_timestamp',
2209                                 'ORDER BY'  => 'rev_timestamp DESC' )
2210                         );
2211                 if( $s === false ) {
2212                         # Something wrong
2213                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
2214                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
2215                         return;
2216                 }
2217
2218                 $set = array();
2219                 if ( $bot ) {
2220                         # Mark all reverted edits as bot
2221                         $set['rc_bot'] = 1;
2222                 }
2223                 if ( $wgUseRCPatrol ) {
2224                         # Mark all reverted edits as patrolled
2225                         $set['rc_patrolled'] = 1;
2226                 }
2227
2228                 if ( $set ) {
2229                         $dbw->update( 'recentchanges', $set,
2230                                 array( /* WHERE */
2231                                         'rc_cur_id'    => $current->getPage(),
2232                                         'rc_user_text' => $current->getUserText(),
2233                                         "rc_timestamp > '{$s->rev_timestamp}'",
2234                                 ), __METHOD__
2235                         );
2236                 }
2237
2238                 # Get the edit summary
2239                 $target = Revision::newFromId( $s->rev_id );
2240                 $newComment = wfMsgForContent( 'revertpage', $target->getUserText(), $from );
2241                 $newComment = $wgRequest->getText( 'summary', $newComment );
2242
2243                 # Save it!
2244                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
2245                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
2246                 $wgOut->addHTML( '<h2>' . htmlspecialchars( $newComment ) . "</h2>\n<hr />\n" );
2247
2248                 $this->updateArticle( $target->getText(), $newComment, 1, $this->mTitle->userIsWatching(), $bot );
2249
2250                 $wgOut->returnToMain( false );
2251         }
2252
2253
2254         /**
2255          * Do standard deferred updates after page view
2256          * @private
2257          */
2258         function viewUpdates() {
2259                 global $wgDeferredUpdateList;
2260
2261                 if ( 0 != $this->getID() ) {
2262                         global $wgDisableCounters;
2263                         if( !$wgDisableCounters ) {
2264                                 Article::incViewCount( $this->getID() );
2265                                 $u = new SiteStatsUpdate( 1, 0, 0 );
2266                                 array_push( $wgDeferredUpdateList, $u );
2267                         }
2268                 }
2269
2270                 # Update newtalk / watchlist notification status
2271                 global $wgUser;
2272                 $wgUser->clearNotification( $this->mTitle );
2273         }
2274
2275         /**
2276          * Do standard deferred updates after page edit.
2277          * Update links tables, site stats, search index and message cache.
2278          * Every 1000th edit, prune the recent changes table.
2279          *
2280          * @private
2281          * @param $text New text of the article
2282          * @param $summary Edit summary
2283          * @param $minoredit Minor edit
2284          * @param $timestamp_of_pagechange Timestamp associated with the page change
2285          * @param $newid rev_id value of the new revision
2286          * @param $changed Whether or not the content actually changed
2287          */
2288         function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange, $newid, $changed = true ) {
2289                 global $wgDeferredUpdateList, $wgMessageCache, $wgUser, $wgParser;
2290
2291                 wfProfileIn( __METHOD__ );
2292
2293                 # Parse the text
2294                 $options = new ParserOptions;
2295                 $options->setTidy(true);
2296                 $poutput = $wgParser->parse( $text, $this->mTitle, $options, true, true, $newid );
2297
2298                 # Save it to the parser cache
2299                 $parserCache =& ParserCache::singleton();
2300                 $parserCache->save( $poutput, $this, $wgUser );
2301
2302                 # Update the links tables
2303                 $u = new LinksUpdate( $this->mTitle, $poutput );
2304                 $u->doUpdate();
2305
2306                 if ( wfRunHooks( 'ArticleEditUpdatesDeleteFromRecentchanges', array( &$this ) ) ) {
2307                         wfSeedRandom();
2308                         if ( 0 == mt_rand( 0, 999 ) ) {
2309                                 # Periodically flush old entries from the recentchanges table.
2310                                 global $wgRCMaxAge;
2311
2312                                 $dbw = wfGetDB( DB_MASTER );
2313                                 $cutoff = $dbw->timestamp( time() - $wgRCMaxAge );
2314                                 $recentchanges = $dbw->tableName( 'recentchanges' );
2315                                 $sql = "DELETE FROM $recentchanges WHERE rc_timestamp < '{$cutoff}'";
2316                                 $dbw->query( $sql );
2317                         }
2318                 }
2319
2320                 $id = $this->getID();
2321                 $title = $this->mTitle->getPrefixedDBkey();
2322                 $shortTitle = $this->mTitle->getDBkey();
2323
2324                 if ( 0 == $id ) {
2325                         wfProfileOut( __METHOD__ );
2326                         return;
2327                 }
2328
2329                 $u = new SiteStatsUpdate( 0, 1, $this->mGoodAdjustment, $this->mTotalAdjustment );
2330                 array_push( $wgDeferredUpdateList, $u );
2331                 $u = new SearchUpdate( $id, $title, $text );
2332                 array_push( $wgDeferredUpdateList, $u );
2333
2334                 # If this is another user's talk page, update newtalk
2335                 # Don't do this if $changed = false otherwise some idiot can null-edit a
2336                 # load of user talk pages and piss people off, nor if it's a minor edit
2337                 # by a properly-flagged bot.
2338                 if( $this->mTitle->getNamespace() == NS_USER_TALK && $shortTitle != $wgUser->getTitleKey() && $changed
2339                         && !($minoredit && $wgUser->isAllowed('nominornewtalk') ) ) {
2340                         if (wfRunHooks('ArticleEditUpdateNewTalk', array(&$this)) ) {
2341                                 $other = User::newFromName( $shortTitle );
2342                                 if( is_null( $other ) && User::isIP( $shortTitle ) ) {
2343                                         // An anonymous user
2344                                         $other = new User();
2345                                         $other->setName( $shortTitle );
2346                                 }
2347                                 if( $other ) {
2348                                         $other->setNewtalk( true );
2349                                 }
2350                         }
2351                 }
2352
2353                 if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
2354                         $wgMessageCache->replace( $shortTitle, $text );
2355                 }
2356
2357                 wfProfileOut( __METHOD__ );
2358         }
2359
2360         /**
2361          * Perform article updates on a special page creation.
2362          *
2363          * @param Revision $rev
2364          *
2365          * @todo This is a shitty interface function. Kill it and replace the
2366          * other shitty functions like editUpdates and such so it's not needed
2367          * anymore.
2368          */
2369         function createUpdates( $rev ) {
2370                 $this->mGoodAdjustment = $this->isCountable( $rev->getText() );
2371                 $this->mTotalAdjustment = 1;
2372                 $this->editUpdates( $rev->getText(), $rev->getComment(),
2373                         $rev->isMinor(), wfTimestamp(), $rev->getId(), true );
2374         }
2375
2376         /**
2377          * Generate the navigation links when browsing through an article revisions
2378          * It shows the information as:
2379          *   Revision as of \<date\>; view current revision
2380          *   \<- Previous version | Next Version -\>
2381          *
2382          * @private
2383          * @param string $oldid         Revision ID of this article revision
2384          */
2385         function setOldSubtitle( $oldid=0 ) {
2386                 global $wgLang, $wgOut, $wgUser;
2387
2388                 if ( !wfRunHooks( 'DisplayOldSubtitle', array(&$this, &$oldid) ) ) {
2389                                 return;
2390                 }
2391
2392                 $revision = Revision::newFromId( $oldid );
2393
2394                 $current = ( $oldid == $this->mLatest );
2395                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
2396                 $sk = $wgUser->getSkin();
2397                 $lnk = $current
2398                         ? wfMsg( 'currentrevisionlink' )
2399                         : $lnk = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
2400                 $curdiff = $current
2401                         ? wfMsg( 'diff' )
2402                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'diff' ), 'diff=cur&oldid='.$oldid );
2403                 $prev = $this->mTitle->getPreviousRevisionID( $oldid ) ;
2404                 $prevlink = $prev
2405                         ? $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid )
2406                         : wfMsg( 'previousrevision' );
2407                 $prevdiff = $prev
2408                         ? $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'diff' ), 'diff=prev&oldid='.$oldid )
2409                         : wfMsg( 'diff' );
2410                 $nextlink = $current
2411                         ? wfMsg( 'nextrevision' )
2412                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
2413                 $nextdiff = $current
2414                         ? wfMsg( 'diff' )
2415                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'diff' ), 'diff=next&oldid='.$oldid );
2416
2417                 $userlinks = $sk->userLink( $revision->getUser(), $revision->getUserText() )
2418                                                 . $sk->userToolLinks( $revision->getUser(), $revision->getUserText() );
2419
2420                 $r = "\n\t\t\t\t<div id=\"mw-revision-info\">" . wfMsg( 'revision-info', $td, $userlinks ) . "</div>\n" .
2421                      "\n\t\t\t\t<div id=\"mw-revision-nav\">" . wfMsg( 'revision-nav', $prevdiff, $prevlink, $lnk, $curdiff, $nextlink, $nextdiff ) . "</div>\n\t\t\t";
2422                 $wgOut->setSubtitle( $r );
2423         }
2424
2425         /**
2426          * This function is called right before saving the wikitext,
2427          * so we can do things like signatures and links-in-context.
2428          *
2429          * @param string $text
2430          */
2431         function preSaveTransform( $text ) {
2432                 global $wgParser, $wgUser;
2433                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
2434         }
2435
2436         /* Caching functions */
2437
2438         /**
2439          * checkLastModified returns true if it has taken care of all
2440          * output to the client that is necessary for this request.
2441          * (that is, it has sent a cached version of the page)
2442          */
2443         function tryFileCache() {
2444                 static $called = false;
2445                 if( $called ) {
2446                         wfDebug( "Article::tryFileCache(): called twice!?\n" );
2447                         return;
2448                 }
2449                 $called = true;
2450                 if($this->isFileCacheable()) {
2451                         $touched = $this->mTouched;
2452                         $cache = new HTMLFileCache( $this->mTitle );
2453                         if($cache->isFileCacheGood( $touched )) {
2454                                 wfDebug( "Article::tryFileCache(): about to load file\n" );
2455                                 $cache->loadFromFileCache();
2456                                 return true;
2457                         } else {
2458                                 wfDebug( "Article::tryFileCache(): starting buffer\n" );
2459                                 ob_start( array(&$cache, 'saveToFileCache' ) );
2460                         }
2461                 } else {
2462                         wfDebug( "Article::tryFileCache(): not cacheable\n" );
2463                 }
2464         }
2465
2466         /**
2467          * Check if the page can be cached
2468          * @return bool
2469          */
2470         function isFileCacheable() {
2471                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest, $wgLang, $wgContLang;
2472                 $action    = $wgRequest->getVal( 'action'    );
2473                 $oldid     = $wgRequest->getVal( 'oldid'     );
2474                 $diff      = $wgRequest->getVal( 'diff'      );
2475                 $redirect  = $wgRequest->getVal( 'redirect'  );
2476                 $printable = $wgRequest->getVal( 'printable' );
2477                 $page      = $wgRequest->getVal( 'page' );
2478
2479                 //check for non-standard user language; this covers uselang,
2480                 //and extensions for auto-detecting user language.
2481                 $ulang     = $wgLang->getCode();
2482                 $clang     = $wgContLang->getCode();
2483
2484                 $cacheable = $wgUseFileCache
2485                         && (!$wgShowIPinHeader)
2486                         && ($this->getID() != 0)
2487                         && ($wgUser->isAnon())
2488                         && (!$wgUser->getNewtalk())
2489                         && ($this->mTitle->getNamespace() != NS_SPECIAL )
2490                         && (empty( $action ) || $action == 'view')
2491                         && (!isset($oldid))
2492                         && (!isset($diff))
2493                         && (!isset($redirect))
2494                         && (!isset($printable))
2495                         && !isset($page)
2496                         && (!$this->mRedirectedFrom)
2497                         && ($ulang === $clang);
2498
2499                 if ( $cacheable ) {
2500                         //extension may have reason to disable file caching on some pages.
2501                         $cacheable = wfRunHooks( 'IsFileCacheable', array( $this ) );
2502                 }
2503
2504                 return $cacheable;
2505         }
2506
2507         /**
2508          * Loads page_touched and returns a value indicating if it should be used
2509          *
2510          */
2511         function checkTouched() {
2512                 if( !$this->mDataLoaded ) {
2513                         $this->loadPageData();
2514                 }
2515                 return !$this->mIsRedirect;
2516         }
2517
2518         /**
2519          * Get the page_touched field
2520          */
2521         function getTouched() {
2522                 # Ensure that page data has been loaded
2523                 if( !$this->mDataLoaded ) {
2524                         $this->loadPageData();
2525                 }
2526                 return $this->mTouched;
2527         }
2528
2529         /**
2530          * Get the page_latest field
2531          */
2532         function getLatest() {
2533                 if ( !$this->mDataLoaded ) {
2534                         $this->loadPageData();
2535                 }
2536                 return $this->mLatest;
2537         }
2538
2539         /**
2540          * Edit an article without doing all that other stuff
2541          * The article must already exist; link tables etc
2542          * are not updated, caches are not flushed.
2543          *
2544          * @param string $text text submitted
2545          * @param string $comment comment submitted
2546          * @param bool $minor whereas it's a minor modification
2547          */
2548         function quickEdit( $text, $comment = '', $minor = 0 ) {
2549                 wfProfileIn( __METHOD__ );
2550
2551                 $dbw = wfGetDB( DB_MASTER );
2552                 $dbw->begin();
2553                 $revision = new Revision( array(
2554                         'page'       => $this->getId(),
2555                         'text'       => $text,
2556                         'comment'    => $comment,
2557                         'minor_edit' => $minor ? 1 : 0,
2558                         ) );
2559                 $revision->insertOn( $dbw );
2560                 $this->updateRevisionOn( $dbw, $revision );
2561                 $dbw->commit();
2562
2563                 wfProfileOut( __METHOD__ );
2564         }
2565
2566         /**
2567          * Used to increment the view counter
2568          *
2569          * @static
2570          * @param integer $id article id
2571          */
2572         function incViewCount( $id ) {
2573                 $id = intval( $id );
2574                 global $wgHitcounterUpdateFreq, $wgDBtype;
2575
2576                 $dbw = wfGetDB( DB_MASTER );
2577                 $pageTable = $dbw->tableName( 'page' );
2578                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
2579                 $acchitsTable = $dbw->tableName( 'acchits' );
2580
2581                 if( $wgHitcounterUpdateFreq <= 1 ) {
2582                         $dbw->query( "UPDATE $pageTable SET page_counter = page_counter + 1 WHERE page_id = $id" );
2583                         return;
2584                 }
2585
2586                 # Not important enough to warrant an error page in case of failure
2587                 $oldignore = $dbw->ignoreErrors( true );
2588
2589                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2590
2591                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2592                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2593                         # Most of the time (or on SQL errors), skip row count check
2594                         $dbw->ignoreErrors( $oldignore );
2595                         return;
2596                 }
2597
2598                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2599                 $row = $dbw->fetchObject( $res );
2600                 $rown = intval( $row->n );
2601                 if( $rown >= $wgHitcounterUpdateFreq ){
2602                         wfProfileIn( 'Article::incViewCount-collect' );
2603                         $old_user_abort = ignore_user_abort( true );
2604
2605                         if ($wgDBtype == 'mysql')
2606                                 $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2607                         $tabletype = $wgDBtype == 'mysql' ? "ENGINE=HEAP " : '';
2608                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable $tabletype AS ".
2609                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2610                                 'GROUP BY hc_id');
2611                         $dbw->query("DELETE FROM $hitcounterTable");
2612                         if ($wgDBtype == 'mysql') {
2613                                 $dbw->query('UNLOCK TABLES');
2614                                 $dbw->query("UPDATE $pageTable,$acchitsTable SET page_counter=page_counter + hc_n ".
2615                                         'WHERE page_id = hc_id');
2616                         }
2617                         else {
2618                                 $dbw->query("UPDATE $pageTable SET page_counter=page_counter + hc_n ".
2619                                         "FROM $acchitsTable WHERE page_id = hc_id");
2620                         }
2621                         $dbw->query("DROP TABLE $acchitsTable");
2622
2623                         ignore_user_abort( $old_user_abort );
2624                         wfProfileOut( 'Article::incViewCount-collect' );
2625                 }
2626                 $dbw->ignoreErrors( $oldignore );
2627         }
2628
2629         /**#@+
2630          * The onArticle*() functions are supposed to be a kind of hooks
2631          * which should be called whenever any of the specified actions
2632          * are done.
2633          *
2634          * This is a good place to put code to clear caches, for instance.
2635          *
2636          * This is called on page move and undelete, as well as edit
2637          * @static
2638          * @param $title_obj a title object
2639          */
2640
2641         static function onArticleCreate($title) {
2642                 # The talk page isn't in the regular link tables, so we need to update manually:
2643                 if ( $title->isTalkPage() ) {
2644                         $other = $title->getSubjectPage();
2645                 } else {
2646                         $other = $title->getTalkPage();
2647                 }
2648                 $other->invalidateCache();
2649                 $other->purgeSquid();
2650
2651                 $title->touchLinks();
2652                 $title->purgeSquid();
2653         }
2654
2655         static function onArticleDelete( $title ) {
2656                 global $wgUseFileCache, $wgMessageCache;
2657
2658                 $title->touchLinks();
2659                 $title->purgeSquid();
2660
2661                 # File cache
2662                 if ( $wgUseFileCache ) {
2663                         $cm = new HTMLFileCache( $title );
2664                         @unlink( $cm->fileCacheName() );
2665                 }
2666
2667                 if( $title->getNamespace() == NS_MEDIAWIKI) {
2668                         $wgMessageCache->replace( $title->getDBkey(), false );
2669                 }
2670         }
2671
2672         /**
2673          * Purge caches on page update etc
2674          */
2675         static function onArticleEdit( $title ) {
2676                 global $wgDeferredUpdateList, $wgUseFileCache;
2677
2678                 // Invalidate caches of articles which include this page
2679                 $update = new HTMLCacheUpdate( $title, 'templatelinks' );
2680                 $wgDeferredUpdateList[] = $update;
2681
2682                 # Purge squid for this page only
2683                 $title->purgeSquid();
2684
2685                 # Clear file cache
2686                 if ( $wgUseFileCache ) {
2687                         $cm = new HTMLFileCache( $title );
2688                         @unlink( $cm->fileCacheName() );
2689                 }
2690         }
2691
2692         /**#@-*/
2693
2694         /**
2695          * Info about this page
2696          * Called for ?action=info when $wgAllowPageInfo is on.
2697          *
2698          * @public
2699          */
2700         function info() {
2701                 global $wgLang, $wgOut, $wgAllowPageInfo, $wgUser;
2702
2703                 if ( !$wgAllowPageInfo ) {
2704                         $wgOut->showErrorPage( 'nosuchaction', 'nosuchactiontext' );
2705                         return;
2706                 }
2707
2708                 $page = $this->mTitle->getSubjectPage();
2709
2710                 $wgOut->setPagetitle( $page->getPrefixedText() );
2711                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
2712
2713                 # first, see if the page exists at all.
2714                 $exists = $page->getArticleId() != 0;
2715                 if( !$exists ) {
2716                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
2717                                 $wgOut->addHTML(wfMsgWeirdKey ( $this->mTitle->getText() ) );
2718                         } else {
2719                                 $wgOut->addHTML(wfMsg( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon' ) );
2720                         }
2721                 } else {
2722                         $dbr = wfGetDB( DB_SLAVE );
2723                         $wl_clause = array(
2724                                 'wl_title'     => $page->getDBkey(),
2725                                 'wl_namespace' => $page->getNamespace() );
2726                         $numwatchers = $dbr->selectField(
2727                                 'watchlist',
2728                                 'COUNT(*)',
2729                                 $wl_clause,
2730                                 __METHOD__,
2731                                 $this->getSelectOptions() );
2732
2733                         $pageInfo = $this->pageCountInfo( $page );
2734                         $talkInfo = $this->pageCountInfo( $page->getTalkPage() );
2735
2736                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $wgLang->formatNum( $numwatchers ) ) . '</li>' );
2737                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $wgLang->formatNum( $pageInfo['edits'] ) ) . '</li>');
2738                         if( $talkInfo ) {
2739                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $wgLang->formatNum( $talkInfo['edits'] ) ) . '</li>');
2740                         }
2741                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $wgLang->formatNum( $pageInfo['authors'] ) ) . '</li>' );
2742                         if( $talkInfo ) {
2743                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $wgLang->formatNum( $talkInfo['authors'] ) ) . '</li>' );
2744                         }
2745                         $wgOut->addHTML( '</ul>' );
2746
2747                 }
2748         }
2749
2750         /**
2751          * Return the total number of edits and number of unique editors
2752          * on a given page. If page does not exist, returns false.
2753          *
2754          * @param Title $title
2755          * @return array
2756          * @private
2757          */
2758         function pageCountInfo( $title ) {
2759                 $id = $title->getArticleId();
2760                 if( $id == 0 ) {
2761                         return false;
2762                 }
2763
2764                 $dbr = wfGetDB( DB_SLAVE );
2765
2766                 $rev_clause = array( 'rev_page' => $id );
2767
2768                 $edits = $dbr->selectField(
2769                         'revision',
2770                         'COUNT(rev_page)',
2771                         $rev_clause,
2772                         __METHOD__,
2773                         $this->getSelectOptions() );
2774
2775                 $authors = $dbr->selectField(
2776                         'revision',
2777                         'COUNT(DISTINCT rev_user_text)',
2778                         $rev_clause,
2779                         __METHOD__,
2780                         $this->getSelectOptions() );
2781
2782                 return array( 'edits' => $edits, 'authors' => $authors );
2783         }
2784
2785         /**
2786          * Return a list of templates used by this article.
2787          * Uses the templatelinks table
2788          *
2789          * @return array Array of Title objects
2790          */
2791         function getUsedTemplates() {
2792                 $result = array();
2793                 $id = $this->mTitle->getArticleID();
2794                 if( $id == 0 ) {
2795                         return array();
2796                 }
2797
2798                 $dbr = wfGetDB( DB_SLAVE );
2799                 $res = $dbr->select( array( 'templatelinks' ),
2800                         array( 'tl_namespace', 'tl_title' ),
2801                         array( 'tl_from' => $id ),
2802                         'Article:getUsedTemplates' );
2803                 if ( false !== $res ) {
2804                         if ( $dbr->numRows( $res ) ) {
2805                                 while ( $row = $dbr->fetchObject( $res ) ) {
2806                                         $result[] = Title::makeTitle( $row->tl_namespace, $row->tl_title );
2807                                 }
2808                         }
2809                 }
2810                 $dbr->freeResult( $res );
2811                 return $result;
2812         }
2813
2814         /**
2815          * Return an auto-generated summary if the text provided is a redirect.
2816          *
2817          * @param  string $text The wikitext to check
2818          * @return string '' or an appropriate summary
2819          */
2820         public static function getRedirectAutosummary( $text ) {
2821                 $rt = Title::newFromRedirect( $text );
2822                 if( is_object( $rt ) )
2823                         return wfMsgForContent( 'autoredircomment', $rt->getFullText() );
2824                 else
2825                         return '';
2826         }
2827
2828         /**
2829          * Return an auto-generated summary if the new text is much shorter than
2830          * the old text.
2831          *
2832          * @param  string $oldtext The previous text of the page
2833          * @param  string $text    The submitted text of the page
2834          * @return string An appropriate autosummary, or an empty string.
2835          */
2836         public static function getBlankingAutosummary( $oldtext, $text ) {
2837                 if ($oldtext!='' && $text=='') {
2838                         return wfMsgForContent('autosumm-blank');
2839                 } elseif (strlen($oldtext) > 10 * strlen($text) && strlen($text) < 500) {
2840                         #Removing more than 90% of the article
2841                         global $wgContLang;
2842                         $truncatedtext = $wgContLang->truncate($text, max(0, 200 - strlen(wfMsgForContent('autosumm-replace'))), '...');
2843                         return wfMsgForContent('autosumm-replace', $truncatedtext);
2844                 } else {
2845                         return '';
2846                 }
2847         }
2848
2849         /**
2850         * Return an applicable autosummary if one exists for the given edit.
2851         * @param string $oldtext The previous text of the page.
2852         * @param string $newtext The submitted text of the page.
2853         * @param bitmask $flags A bitmask of flags submitted for the edit.
2854         * @return string An appropriate autosummary, or an empty string.
2855         */
2856         public static function getAutosummary( $oldtext, $newtext, $flags ) {
2857
2858                 # This code is UGLY UGLY UGLY.
2859                 # Somebody PLEASE come up with a more elegant way to do it.
2860
2861                 #Redirect autosummaries
2862                 $summary = self::getRedirectAutosummary( $newtext );
2863
2864                 if ($summary)
2865                         return $summary;
2866
2867                 #Blanking autosummaries
2868                 if (!($flags & EDIT_NEW))
2869                         $summary = self::getBlankingAutosummary( $oldtext, $newtext );
2870
2871                 if ($summary)
2872                         return $summary;
2873
2874                 #New page autosummaries
2875                 if ($flags & EDIT_NEW && strlen($newtext)) {
2876                         #If they're making a new article, give its text, truncated, in the summary.
2877                         global $wgContLang;
2878                         $truncatedtext = $wgContLang->truncate(
2879                                 str_replace("\n", ' ', $newtext),
2880                                 max( 0, 200 - strlen( wfMsgForContent( 'autosumm-new') ) ),
2881                                 '...' );
2882                         $summary = wfMsgForContent( 'autosumm-new', $truncatedtext );
2883                 }
2884
2885                 if ($summary)
2886                         return $summary;
2887
2888                 return $summary;
2889         }
2890
2891         /**
2892          * Add the primary page-view wikitext to the output buffer
2893          * Saves the text into the parser cache if possible.
2894          * Updates templatelinks if it is out of date.
2895          *
2896          * @param string  $text
2897          * @param bool    $cache
2898          */
2899         public function outputWikiText( $text, $cache = true ) {
2900                 global $wgParser, $wgUser, $wgOut;
2901
2902                 $popts = $wgOut->parserOptions();
2903                 $popts->setTidy(true);
2904                 $parserOutput = $wgParser->parse( $text, $this->mTitle,
2905                         $popts, true, true, $this->getRevIdFetched() );
2906                 $popts->setTidy(false);
2907                 if ( $cache && $this && $parserOutput->getCacheTime() != -1 ) {
2908                         $parserCache =& ParserCache::singleton();
2909                         $parserCache->save( $parserOutput, $this, $wgUser );
2910                 }
2911
2912                 if ( !wfReadOnly() && $this->mTitle->areRestrictionsCascading() ) {
2913                         // templatelinks table may have become out of sync,
2914                         // especially if using variable-based transclusions.
2915                         // For paranoia, check if things have changed and if
2916                         // so apply updates to the database. This will ensure
2917                         // that cascaded protections apply as soon as the changes
2918                         // are visible.
2919
2920                         # Get templates from templatelinks
2921                         $id = $this->mTitle->getArticleID();
2922
2923                         $tlTemplates = array();
2924
2925                         $dbr = wfGetDB( DB_SLAVE );
2926                         $res = $dbr->select( array( 'templatelinks' ),
2927                                 array( 'tl_namespace', 'tl_title' ),
2928                                 array( 'tl_from' => $id ),
2929                                 'Article:getUsedTemplates' );
2930
2931                         global $wgContLang;
2932
2933                         if ( false !== $res ) {
2934                                 if ( $dbr->numRows( $res ) ) {
2935                                         while ( $row = $dbr->fetchObject( $res ) ) {
2936                                                 $tlTemplates[] = $wgContLang->getNsText( $row->tl_namespace ) . ':' . $row->tl_title ;
2937                                         }
2938                                 }
2939                         }
2940
2941                         # Get templates from parser output.
2942                         $poTemplates_allns = $parserOutput->getTemplates();
2943
2944                         $poTemplates = array ();
2945                         foreach ( $poTemplates_allns as $ns_templates ) {
2946                                 $poTemplates = array_merge( $poTemplates, $ns_templates );
2947                         }
2948
2949                         # Get the diff
2950                         $templates_diff = array_diff( $poTemplates, $tlTemplates );
2951
2952                         if ( count( $templates_diff ) > 0 ) {
2953                                 # Whee, link updates time.
2954                                 $u = new LinksUpdate( $this->mTitle, $parserOutput );
2955
2956                                 $dbw = wfGetDb( DB_MASTER );
2957                                 $dbw->begin();
2958
2959                                 $u->doUpdate();
2960
2961                                 $dbw->commit();
2962                         }
2963                 }
2964
2965                 $wgOut->addParserOutput( $parserOutput );
2966         }
2967
2968 }
2969
2970 ?>