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