includes/Article.php

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