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                 $dbr =& $this->getDB();
 366                 $fname = 'Article::fetchContent';
 367
 368                 # Pre-fill content with error message so that if something
 369                 # fails we'll have something telling us what we intended.
 370                 $t = $this->mTitle->getPrefixedText();
 371                 if( $oldid ) {
 372                         $t .= ',oldid='.$oldid;
 373                 }
 374                 if( isset( $redirect ) ) {
 375                         $redirect = ($redirect == 'no') ? 'no' : 'yes';
 376                         $t .= ',redirect='.$redirect;
 377                 }
 378                 $this->mContent = wfMsg( 'missingarticle', $t );
 379
 380                 if( $oldid ) {
 381                         $revision = Revision::newFromId( $oldid );
 382                         if( is_null( $revision ) ) {
 383                                 wfDebug( "$fname failed to retrieve specified revision, id $oldid\n" );
 384                                 return false;
 385                         }
 386                         $data = $this->pageDataFromId( $dbr, $revision->getPage() );
 387                         if( !$data ) {
 388                                 wfDebug( "$fname failed to get page data linked to revision id $oldid\n" );
 389                                 return false;
 390                         }
 391                         $this->mTitle = Title::makeTitle( $data->page_namespace, $data->page_title );
 392                         $this->loadPageData( $data );
 393                 } else {
 394                         if( !$this->mDataLoaded ) {
 395                                 $data = $this->pageDataFromTitle( $dbr, $this->mTitle );
 396                                 if( !$data ) {
 397                                         wfDebug( "$fname failed to find page data for title " . $this->mTitle->getPrefixedText() . "\n" );
 398                                         return false;
 399                                 }
 400                                 $this->loadPageData( $data );
 401                         }
 402                         $revision = Revision::newFromId( $this->mLatest );
 403                         if( is_null( $revision ) ) {
 404                                 wfDebug( "$fname failed to retrieve current page, rev_id $data->page_latest\n" );
 405                                 return false;
 406                         }
 407                 }
 408
 409                 # If we got a redirect, follow it (unless we've been told
 410                 # not to by either the function parameter or the query
 411                 if ( !$oldid && !$noredir ) {
 412                         $rt = Title::newFromRedirect( $revision->getText() );
 413                         # process if title object is valid and not special:userlogout
 414                         if ( $rt && ! ( $rt->getNamespace() == NS_SPECIAL && $rt->getText() == 'Userlogout' ) ) {
 415                                 # Gotta hand redirects to special pages differently:
 416                                 # Fill the HTTP response "Location" header and ignore
 417                                 # the rest of the page we're on.
 418                                 global $wgDisableHardRedirects;
 419                                 if( $globalTitle && !$wgDisableHardRedirects ) {
 420                                         global $wgOut;
 421                                         if ( $rt->getInterwiki() != '' && $rt->isLocal() ) {
 422                                                 $source = $this->mTitle->getFullURL( 'redirect=no' );
 423                                                 $wgOut->redirect( $rt->getFullURL( 'rdfrom=' . urlencode( $source ) ) ) ;
 424                                                 return false;
 425                                         }
 426                                         if ( $rt->getNamespace() == NS_SPECIAL ) {
 427                                                 $wgOut->redirect( $rt->getFullURL() );
 428                                                 return false;
 429                                         }
 430                                 }
 431                                 if( $rt->getInterwiki() == '' ) {
 432                                         $redirData = $this->pageDataFromTitle( $dbr, $rt );
 433                                         if( $redirData ) {
 434                                                 $redirRev = Revision::newFromId( $redirData->page_latest );
 435                                                 if( !is_null( $redirRev ) ) {
 436                                                         $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 437                                                         $this->mTitle = $rt;
 438                                                         $data = $redirData;
 439                                                         $this->loadPageData( $data );
 440                                                         $revision = $redirRev;
 441                                                 }
 442                                         }
 443                                 }
 444                         }
 445                 }
 446
 447                 # if the title's different from expected, update...
 448                 if( $globalTitle ) {
 449                         global $wgTitle;
 450                         if( !$this->mTitle->equals( $wgTitle ) ) {
 451                                 $wgTitle = $this->mTitle;
 452                         }
 453                 }
 454
 455                 # Back to the business at hand...
 456                 $this->mContent   = $revision->getText();
 457
 458                 $this->mUser      = $revision->getUser();
 459                 $this->mUserText  = $revision->getUserText();
 460                 $this->mComment   = $revision->getComment();
 461                 $this->mTimestamp = wfTimestamp( TS_MW, $revision->getTimestamp() );
 462
 463                 $this->mRevIdFetched = $revision->getID();
 464                 $this->mContentLoaded = true;
 465                 $this->mRevision =& $revision;
 466
 467                 return $this->mContent;
 468         }
 469
 470         /**
 471          * Gets the article text without using so many damn globals
 472          * Returns false on error
 473          *
 474          * @param integer $oldid
 475          */
 476         function getContentWithoutUsingSoManyDamnGlobals( $oldid = 0, $noredir = false ) {
 477                 return $this->fetchContent( $oldid, $noredir, false );
 478         }
 479
 480         /**
 481          * Read/write accessor to select FOR UPDATE
 482          */
 483         function forUpdate( $x = NULL ) {
 484                 return wfSetVar( $this->mForUpdate, $x );
 485         }
 486
 487         /**
 488          * Get the database which should be used for reads
 489          */
 490         function &getDB() {
 491                 $ret =& wfGetDB( DB_MASTER );
 492                 return $ret;
 493                 #if ( $this->mForUpdate ) {
 494                         $ret =& wfGetDB( DB_MASTER );
 495                 #} else {
 496                 #       $ret =& wfGetDB( DB_SLAVE );
 497                 #}
 498                 return $ret;
 499         }
 500
 501         /**
 502          * Get options for all SELECT statements
 503          * Can pass an option array, to which the class-wide options will be appended
 504          */
 505         function getSelectOptions( $options = '' ) {
 506                 if ( $this->mForUpdate ) {
 507                         if ( is_array( $options ) ) {
 508                                 $options[] = 'FOR UPDATE';
 509                         } else {
 510                                 $options = 'FOR UPDATE';
 511                         }
 512                 }
 513                 return $options;
 514         }
 515
 516         /**
 517          * Return the Article ID
 518          */
 519         function getID() {
 520                 if( $this->mTitle ) {
 521                         return $this->mTitle->getArticleID();
 522                 } else {
 523                         return 0;
 524                 }
 525         }
 526
 527         /**
 528          * Returns true if this article exists in the database.
 529          * @return bool
 530          */
 531         function exists() {
 532                 return $this->getId() != 0;
 533         }
 534
 535         /**
 536          * Get the view count for this article
 537          */
 538         function getCount() {
 539                 if ( -1 == $this->mCounter ) {
 540                         $id = $this->getID();
 541                         $dbr =& $this->getDB();
 542                         $this->mCounter = $dbr->selectField( 'page', 'page_counter', array( 'page_id' => $id ),
 543                                 'Article::getCount', $this->getSelectOptions() );
 544                 }
 545                 return $this->mCounter;
 546         }
 547
 548         /**
 549          * Would the given text make this article a "good" article (i.e.,
 550          * suitable for including in the article count)?
 551          * @param string $text Text to analyze
 552          * @return integer 1 if it can be counted else 0
 553          */
 554         function isCountable( $text ) {
 555                 global $wgUseCommaCount;
 556
 557                 if ( NS_MAIN != $this->mTitle->getNamespace() ) { return 0; }
 558                 if ( $this->isRedirect( $text ) ) { return 0; }
 559                 $token = ($wgUseCommaCount ? ',' : '[[' );
 560                 if ( false === strstr( $text, $token ) ) { return 0; }
 561                 return 1;
 562         }
 563
 564         /**
 565          * Tests if the article text represents a redirect
 566          */
 567         function isRedirect( $text = false ) {
 568                 if ( $text === false ) {
 569                         $this->loadContent();
 570                         $titleObj = Title::newFromRedirect( $this->fetchContent() );
 571                 } else {
 572                         $titleObj = Title::newFromRedirect( $text );
 573                 }
 574                 return $titleObj !== NULL;
 575         }
 576
 577         /**
 578          * Returns true if the currently-referenced revision is the current edit
 579          * to this page (and it exists).
 580          * @return bool
 581          */
 582         function isCurrent() {
 583                 return $this->exists() &&
 584                         isset( $this->mRevision ) &&
 585                         $this->mRevision->isCurrent();
 586         }
 587
 588         /**
 589          * Loads everything except the text
 590          * This isn't necessary for all uses, so it's only done if needed.
 591          * @private
 592          */
 593         function loadLastEdit() {
 594                 global $wgOut;
 595
 596                 if ( -1 != $this->mUser )
 597                         return;
 598
 599                 # New or non-existent articles have no user information
 600                 $id = $this->getID();
 601                 if ( 0 == $id ) return;
 602
 603                 $this->mLastRevision = Revision::loadFromPageId( $this->getDB(), $id );
 604                 if( !is_null( $this->mLastRevision ) ) {
 605                         $this->mUser      = $this->mLastRevision->getUser();
 606                         $this->mUserText  = $this->mLastRevision->getUserText();
 607                         $this->mTimestamp = $this->mLastRevision->getTimestamp();
 608                         $this->mComment   = $this->mLastRevision->getComment();
 609                         $this->mMinorEdit = $this->mLastRevision->isMinor();
 610                 }
 611         }
 612
 613         function getTimestamp() {
 614                 $this->loadLastEdit();
 615                 return wfTimestamp(TS_MW, $this->mTimestamp);
 616         }
 617
 618         function getUser() {
 619                 $this->loadLastEdit();
 620                 return $this->mUser;
 621         }
 622
 623         function getUserText() {
 624                 $this->loadLastEdit();
 625                 return $this->mUserText;
 626         }
 627
 628         function getComment() {
 629                 $this->loadLastEdit();
 630                 return $this->mComment;
 631         }
 632
 633         function getMinorEdit() {
 634                 $this->loadLastEdit();
 635                 return $this->mMinorEdit;
 636         }
 637
 638         function getRevIdFetched() {
 639                 $this->loadLastEdit();
 640                 return $this->mRevIdFetched;
 641         }
 642
 643         function getContributors($limit = 0, $offset = 0) {
 644                 $fname = 'Article::getContributors';
 645
 646                 # XXX: this is expensive; cache this info somewhere.
 647
 648                 $title = $this->mTitle;
 649                 $contribs = array();
 650                 $dbr =& $this->getDB();
 651                 $revTable = $dbr->tableName( 'revision' );
 652                 $userTable = $dbr->tableName( 'user' );
 653                 $encDBkey = $dbr->addQuotes( $title->getDBkey() );
 654                 $ns = $title->getNamespace();
 655                 $user = $this->getUser();
 656                 $pageId = $this->getId();
 657
 658                 $sql = "SELECT rev_user, rev_user_text, user_real_name, MAX(rev_timestamp) as timestamp
 659                         FROM $revTable LEFT JOIN $userTable ON rev_user = user_id
 660                         WHERE rev_page = $pageId
 661                         AND rev_user != $user
 662                         GROUP BY rev_user, rev_user_text, user_real_name
 663                         ORDER BY timestamp DESC";
 664
 665                 if ($limit > 0) { $sql .= ' LIMIT '.$limit; }
 666                 $sql .= ' '. $this->getSelectOptions();
 667
 668                 $res = $dbr->query($sql, $fname);
 669
 670                 while ( $line = $dbr->fetchObject( $res ) ) {
 671                         $contribs[] = array($line->rev_user, $line->rev_user_text, $line->user_real_name);
 672                 }
 673
 674                 $dbr->freeResult($res);
 675                 return $contribs;
 676         }
 677
 678         /**
 679          * This is the default action of the script: just view the page of
 680          * the given title.
 681         */
 682         function view() {
 683                 global $wgUser, $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgContLang;
 684                 global $wgEnableParserCache, $wgStylePath, $wgUseRCPatrol, $wgParser;
 685                 global $wgParserCache, $wgUseTrackbacks;
 686                 $sk = $wgUser->getSkin();
 687
 688                 $fname = 'Article::view';
 689                 wfProfileIn( $fname );
 690                 # Get variables from query string
 691                 $oldid = $this->getOldID();
 692                 $diff = $wgRequest->getVal( 'diff' );
 693                 $rcid = $wgRequest->getVal( 'rcid' );
 694                 $rdfrom = $wgRequest->getVal( 'rdfrom' );
 695
 696                 $wgOut->setArticleFlag( true );
 697                 $wgOut->setRobotpolicy( 'index,follow' );
 698                 # If we got diff and oldid in the query, we want to see a
 699                 # diff page instead of the article.
 700
 701                 if ( !is_null( $diff ) ) {
 702                         require_once( 'DifferenceEngine.php' );
 703                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 704
 705                         $de = new DifferenceEngine( $this->mTitle, $oldid, $diff, $rcid );
 706                         // DifferenceEngine directly fetched the revision:
 707                         $this->mRevIdFetched = $de->mNewid;
 708                         $de->showDiffPage();
 709
 710                         if( $diff == 0 ) {
 711                                 # Run view updates for current revision only
 712                                 $this->viewUpdates();
 713                         }
 714                         wfProfileOut( $fname );
 715                         return;
 716                 }
 717
 718                 if ( empty( $oldid ) && $this->checkTouched() ) {
 719                         $wgOut->setETag($wgParserCache->getETag($this, $wgUser));
 720
 721                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 722                                 wfProfileOut( $fname );
 723                                 return;
 724                         } else if ( $this->tryFileCache() ) {
 725                                 # tell wgOut that output is taken care of
 726                                 $wgOut->disable();
 727                                 $this->viewUpdates();
 728                                 wfProfileOut( $fname );
 729                                 return;
 730                         }
 731                 }
 732                 # Should the parser cache be used?
 733                 $pcache = $wgEnableParserCache &&
 734                         intval( $wgUser->getOption( 'stubthreshold' ) ) == 0 &&
 735                         $this->exists() &&
 736                         empty( $oldid );
 737                 wfDebug( 'Article::view using parser cache: ' . ($pcache ? 'yes' : 'no' ) . "\n" );
 738
 739                 $outputDone = false;
 740                 if ( $pcache ) {
 741                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 742                                 $outputDone = true;
 743                         }
 744                 }
 745                 if ( !$outputDone ) {
 746                         $text = $this->getContent( false ); # May change mTitle by following a redirect
 747
 748                         # Another whitelist check in case oldid or redirects are altering the title
 749                         if ( !$this->mTitle->userCanRead() ) {
 750                                 $wgOut->loginToUse();
 751                                 $wgOut->output();
 752                                 exit;
 753                         }
 754
 755                         # We're looking at an old revision
 756
 757                         if ( !empty( $oldid ) ) {
 758                                 $this->setOldSubtitle( isset($this->mOldId) ? $this->mOldId : $oldid );
 759                                 $wgOut->setRobotpolicy( 'noindex,follow' );
 760                         }
 761                         $wasRedirected = false;
 762                         if ( '' != $this->mRedirectedFrom ) {
 763                                 if ( wfRunHooks( 'ArticleViewRedirect', array( &$this ) ) ) {
 764                                         $sk = $wgUser->getSkin();
 765                                         $redir = $sk->makeKnownLink( $this->mRedirectedFrom, '', 'redirect=no' );
 766                                         $s = wfMsg( 'redirectedfrom', $redir );
 767                                         $wgOut->setSubtitle( $s );
 768
 769                                         // Check the parser cache again, for the target page
 770                                         if( $pcache ) {
 771                                                 if( $wgOut->tryParserCache( $this, $wgUser ) ) {
 772                                                         $outputDone = true;
 773                                                 }
 774                                         }
 775                                         $wasRedirected = true;
 776                                 }
 777                         } elseif ( !empty( $rdfrom ) ) {
 778                                 global $wgRedirectSources;
 779                                 if( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 780                                         $sk = $wgUser->getSkin();
 781                                         $redir = $sk->makeExternalLink( $rdfrom, $rdfrom );
 782                                         $s = wfMsg( 'redirectedfrom', $redir );
 783                                         $wgOut->setSubtitle( $s );
 784                                         $wasRedirected = true;
 785                                 }
 786                         }
 787                 }
 788                 if( !$outputDone ) {
 789                         /**
 790                          * @fixme: this hook doesn't work most of the time, as it doesn't
 791                          * trigger when the parser cache is used.
 792                          */
 793                         wfRunHooks( 'ArticleViewHeader', array( &$this ) ) ;
 794                         # wrap user css and user js in pre and don't parse
 795                         # XXX: use $this->mTitle->usCssJsSubpage() when php is fixed/ a workaround is found
 796                         if (
 797                                 $this->mTitle->getNamespace() == NS_USER &&
 798                                 preg_match('/\\/[\\w]+\\.(css|js)$/', $this->mTitle->getDBkey())
 799                         ) {
 800                                 $wgOut->setRevisionId( $this->getRevIdFetched() );
 801                                 $wgOut->addWikiText( wfMsg('clearyourcache'));
 802                                 $wgOut->addHTML( '<pre>'.htmlspecialchars($this->mContent)."\n</pre>" );
 803                         } else if ( $rt = Title::newFromRedirect( $text ) ) {
 804                                 # Display redirect
 805                                 $imageDir = $wgContLang->isRTL() ? 'rtl' : 'ltr';
 806                                 $imageUrl = $wgStylePath.'/common/images/redirect' . $imageDir . '.png';
 807                                 if( !$wasRedirected ) {
 808                                         $wgOut->setSubtitle( wfMsgHtml( 'redirectpagesub' ) );
 809                                 }
 810                                 $targetUrl = $rt->escapeLocalURL();
 811                                 $titleText = htmlspecialchars( $rt->getPrefixedText() );
 812                                 $link = $sk->makeLinkObj( $rt );
 813
 814                                 $wgOut->addHTML( '<img src="'.$imageUrl.'" alt="#REDIRECT" />' .
 815                                   '<span class="redirectText">'.$link.'</span>' );
 816
 817                                 $parseout = $wgParser->parse($text, $this->mTitle, ParserOptions::newFromUser($wgUser));
 818                                 $catlinks = $parseout->getCategoryLinks();
 819                                 $wgOut->addCategoryLinks($catlinks);
 820                                 $skin = $wgUser->getSkin();
 821                         } else if ( $pcache ) {
 822                                 # Display content and save to parser cache
 823                                 $wgOut->setRevisionId( $this->getRevIdFetched() );
 824                                 $wgOut->addPrimaryWikiText( $text, $this );
 825                         } else {
 826                                 # Display content, don't attempt to save to parser cache
 827
 828                                 # Don't show section-edit links on old revisions... this way lies madness.
 829                                 if( !$this->isCurrent() ) {
 830                                         $oldEditSectionSetting = $wgOut->mParserOptions->setEditSection( false );
 831                                 }
 832                                 $wgOut->setRevisionId( $this->getRevIdFetched() );
 833                                 $wgOut->addWikiText( $text );
 834
 835                                 if( !$this->isCurrent() ) {
 836                                         $wgOut->mParserOptions->setEditSection( $oldEditSectionSetting );
 837                                 }
 838                         }
 839                 }
 840                 /* title may have been set from the cache */
 841                 $t = $wgOut->getPageTitle();
 842                 if( empty( $t ) ) {
 843                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 844                 }
 845
 846                 # If we have been passed an &rcid= parameter, we want to give the user a
 847                 # chance to mark this new article as patrolled.
 848                 if ( $wgUseRCPatrol
 849                         && !is_null($rcid)
 850                         && $rcid != 0
 851                         && $wgUser->isLoggedIn()
 852                         && ( $wgUser->isAllowed('patrol') || !$wgOnlySysopsCanPatrol ) )
 853                 {
 854                         $wgOut->addHTML(
 855                                 "<div class='patrollink'>" .
 856                                         wfMsg ( 'markaspatrolledlink',
 857                                         $sk->makeKnownLinkObj( $this->mTitle, wfMsg('markaspatrolledtext'), "action=markpatrolled&rcid=$rcid" )
 858                                         ) .
 859                                 '</div>'
 860                          );
 861                 }
 862
 863                 # Trackbacks
 864                 if ($wgUseTrackbacks)
 865                         $this->addTrackbacks();
 866
 867                 # Add link titles as META keywords
 868                 $wgOut->addMetaTags() ;
 869
 870                 $this->viewUpdates();
 871                 wfProfileOut( $fname );
 872         }
 873
 874         function addTrackbacks() {
 875                 global $wgOut, $wgUser;
 876
 877                 $dbr =& wfGetDB(DB_SLAVE);
 878                 $tbs = $dbr->select(
 879                                 /* FROM   */ 'trackbacks',
 880                                 /* SELECT */ array('tb_id', 'tb_title', 'tb_url', 'tb_ex', 'tb_name'),
 881                                 /* WHERE  */ array('tb_page' => $this->getID())
 882                 );
 883
 884                 if (!$dbr->numrows($tbs))
 885                         return;
 886
 887                 $tbtext = "";
 888                 while ($o = $dbr->fetchObject($tbs)) {
 889                         $rmvtxt = "";
 890                         if ($wgUser->isSysop()) {
 891                                 $delurl = $this->mTitle->getFullURL("action=deletetrackback&tbid="
 892                                                 . $o->tb_id . "&token=" . $wgUser->editToken());
 893                                 $rmvtxt = wfMsg('trackbackremove', $delurl);
 894                         }
 895                         $tbtext .= wfMsg(strlen($o->tb_ex) ? 'trackbackexcerpt' : 'trackback',
 896                                         $o->tb_title,
 897                                         $o->tb_url,
 898                                         $o->tb_ex,
 899                                         $o->tb_name,
 900                                         $rmvtxt);
 901                 }
 902                 $wgOut->addWikitext(wfMsg('trackbackbox', $tbtext));
 903         }
 904
 905         function deletetrackback() {
 906                 global $wgUser, $wgRequest, $wgOut, $wgTitle;
 907
 908                 if (!$wgUser->matchEditToken($wgRequest->getVal('token'))) {
 909                         $wgOut->addWikitext(wfMsg('sessionfailure'));
 910                         return;
 911                 }
 912
 913                 if ((!$wgUser->isAllowed('delete'))) {
 914                         $wgOut->sysopRequired();
 915                         return;
 916                 }
 917
 918                 if (wfReadOnly()) {
 919                         $wgOut->readOnlyPage();
 920                         return;
 921                 }
 922
 923                 $db =& wfGetDB(DB_MASTER);
 924                 $db->delete('trackbacks', array('tb_id' => $wgRequest->getInt('tbid')));
 925                 $wgTitle->invalidateCache();
 926                 $wgOut->addWikiText(wfMsg('trackbackdeleteok'));
 927         }
 928
 929         function render() {
 930                 global $wgOut;
 931
 932                 $wgOut->setArticleBodyOnly(true);
 933                 $this->view();
 934         }
 935
 936         function purge() {
 937                 global $wgUser, $wgRequest, $wgOut, $wgUseSquid;
 938
 939                 if ( $wgUser->isLoggedIn() || $wgRequest->wasPosted() ) {
 940                         // Invalidate the cache
 941                         $this->mTitle->invalidateCache();
 942
 943                         if ( $wgUseSquid ) {
 944                                 // Commit the transaction before the purge is sent
 945                                 $dbw = wfGetDB( DB_MASTER );
 946                                 $dbw->immediateCommit();
 947
 948                                 // Send purge
 949                                 $update = SquidUpdate::newSimplePurge( $this->mTitle );
 950                                 $update->doUpdate();
 951                         }
 952                         $this->view();
 953                 } else {
 954                         $msg = $wgOut->parse( wfMsg( 'confirm_purge' ) );
 955                         $action = $this->mTitle->escapeLocalURL( 'action=purge' );
 956                         $button = htmlspecialchars( wfMsg( 'confirm_purge_button' ) );
 957                         $msg = str_replace( '$1',
 958                                 "<form method=\"post\" action=\"$action\">\n" .
 959                                 "<input type=\"submit\" name=\"submit\" value=\"$button\" />\n" .
 960                                 "</form>\n", $msg );
 961
 962                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 963                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
 964                         $wgOut->addHTML( $msg );
 965                 }
 966         }
 967
 968         /**
 969          * Insert a new empty page record for this article.
 970          * This *must* be followed up by creating a revision
 971          * and running $this->updateToLatest( $rev_id );
 972          * or else the record will be left in a funky state.
 973          * Best if all done inside a transaction.
 974          *
 975          * @param Database $dbw
 976          * @param string   $restrictions
 977          * @return int     The newly created page_id key
 978          * @access private
 979          */
 980         function insertOn( &$dbw, $restrictions = '' ) {
 981                 $fname = 'Article::insertOn';
 982                 wfProfileIn( $fname );
 983
 984                 $page_id = $dbw->nextSequenceValue( 'page_page_id_seq' );
 985                 $dbw->insert( 'page', array(
 986                         'page_id'           => $page_id,
 987                         'page_namespace'    => $this->mTitle->getNamespace(),
 988                         'page_title'        => $this->mTitle->getDBkey(),
 989                         'page_counter'      => 0,
 990                         'page_restrictions' => $restrictions,
 991                         'page_is_redirect'  => 0, # Will set this shortly...
 992                         'page_is_new'       => 1,
 993                         'page_random'       => wfRandom(),
 994                         'page_touched'      => $dbw->timestamp(),
 995                         'page_latest'       => 0, # Fill this in shortly...
 996                         'page_len'          => 0, # Fill this in shortly...
 997                 ), $fname );
 998                 $newid = $dbw->insertId();
 999
1000                 $this->mTitle->resetArticleId( $newid );
1001
1002                 wfProfileOut( $fname );
1003                 return $newid;
1004         }
1005
1006         /**
1007          * Update the page record to point to a newly saved revision.
1008          *
1009          * @param Database $dbw
1010          * @param Revision $revision -- for ID number, and text used to set
1011                                         length and redirect status fields
1012          * @param int $lastRevision -- if given, will not overwrite the page field
1013          *                             when different from the currently set value.
1014          *                             Giving 0 indicates the new page flag should
1015          *                             be set on.
1016          * @return bool true on success, false on failure
1017          * @access private
1018          */
1019         function updateRevisionOn( &$dbw, $revision, $lastRevision = null ) {
1020                 $fname = 'Article::updateToRevision';
1021                 wfProfileIn( $fname );
1022
1023                 $conditions = array( 'page_id' => $this->getId() );
1024                 if( !is_null( $lastRevision ) ) {
1025                         # An extra check against threads stepping on each other
1026                         $conditions['page_latest'] = $lastRevision;
1027                 }
1028
1029                 $text = $revision->getText();
1030                 $dbw->update( 'page',
1031                         array( /* SET */
1032                                 'page_latest'      => $revision->getId(),
1033                                 'page_touched'     => $dbw->timestamp(),
1034                                 'page_is_new'      => ($lastRevision === 0) ? 1 : 0,
1035                                 'page_is_redirect' => Article::isRedirect( $text ) ? 1 : 0,
1036                                 'page_len'         => strlen( $text ),
1037                         ),
1038                         $conditions,
1039                         $fname );
1040
1041                 wfProfileOut( $fname );
1042                 return ( $dbw->affectedRows() != 0 );
1043         }
1044
1045         /**
1046          * If the given revision is newer than the currently set page_latest,
1047          * update the page record. Otherwise, do nothing.
1048          *
1049          * @param Database $dbw
1050          * @param Revision $revision
1051          */
1052         function updateIfNewerOn( &$dbw, $revision ) {
1053                 $fname = 'Article::updateIfNewerOn';
1054                 wfProfileIn( $fname );
1055
1056                 $row = $dbw->selectRow(
1057                         array( 'revision', 'page' ),
1058                         array( 'rev_id', 'rev_timestamp' ),
1059                         array(
1060                                 'page_id' => $this->getId(),
1061                                 'page_latest=rev_id' ),
1062                         $fname );
1063                 if( $row ) {
1064                         if( wfTimestamp(TS_MW, $row->rev_timestamp) >= $revision->getTimestamp() ) {
1065                                 wfProfileOut( $fname );
1066                                 return false;
1067                         }
1068                         $prev = $row->rev_id;
1069                 } else {
1070                         # No or missing previous revision; mark the page as new
1071                         $prev = 0;
1072                 }
1073
1074                 $ret = $this->updateRevisionOn( $dbw, $revision, $prev );
1075                 wfProfileOut( $fname );
1076                 return $ret;
1077         }
1078
1079         /**
1080          * Theoretically we could defer these whole insert and update
1081          * functions for after display, but that's taking a big leap
1082          * of faith, and we want to be able to report database
1083          * errors at some point.
1084          * @private
1085          */
1086         function insertNewArticle( $text, $summary, $isminor, $watchthis, $suppressRC=false, $comment=false ) {
1087                 global $wgOut, $wgUser, $wgUseSquid;
1088
1089                 $fname = 'Article::insertNewArticle';
1090                 wfProfileIn( $fname );
1091
1092                 if( !wfRunHooks( 'ArticleSave', array( &$this, &$wgUser, &$text,
1093                         &$summary, &$isminor, &$watchthis, NULL ) ) ) {
1094                         wfDebug( "$fname: ArticleSave hook aborted save!\n" );
1095                         wfProfileOut( $fname );
1096                         return false;
1097                 }
1098
1099                 $this->mGoodAdjustment = $this->isCountable( $text );
1100                 $this->mTotalAdjustment = 1;
1101
1102                 $ns = $this->mTitle->getNamespace();
1103                 $ttl = $this->mTitle->getDBkey();
1104
1105                 # If this is a comment, add the summary as headline
1106                 if($comment && $summary!="") {
1107                         $text="== {$summary} ==\n\n".$text;
1108                 }
1109                 $text = $this->preSaveTransform( $text );
1110                 $isminor = ( $isminor && $wgUser->isLoggedIn() ) ? 1 : 0;
1111                 $now = wfTimestampNow();
1112
1113                 $dbw =& wfGetDB( DB_MASTER );
1114
1115                 # Add the page record; stake our claim on this title!
1116                 $newid = $this->insertOn( $dbw );
1117
1118                 # Save the revision text...
1119                 $revision = new Revision( array(
1120                         'page'       => $newid,
1121                         'comment'    => $summary,
1122                         'minor_edit' => $isminor,
1123                         'text'       => $text
1124                         ) );
1125                 $revisionId = $revision->insertOn( $dbw );
1126
1127                 $this->mTitle->resetArticleID( $newid );
1128
1129                 # Update the page record with revision data
1130                 $this->updateRevisionOn( $dbw, $revision, 0 );
1131
1132                 Article::onArticleCreate( $this->mTitle );
1133                 if(!$suppressRC) {
1134                         RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary, 'default',
1135                           '', strlen( $text ), $revisionId );
1136                 }
1137
1138                 if ($watchthis) {
1139                         if(!$this->mTitle->userIsWatching()) $this->watch();
1140                 } else {
1141                         if ( $this->mTitle->userIsWatching() ) {
1142                                 $this->unwatch();
1143                         }
1144                 }
1145
1146                 # The talk page isn't in the regular link tables, so we need to update manually:
1147                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
1148                 $dbw->update( 'page',
1149                         array( 'page_touched' => $dbw->timestamp($now) ),
1150                         array( 'page_namespace' => $talkns,
1151                                'page_title' => $ttl ),
1152                         $fname );
1153
1154                 # standard deferred updates
1155                 $this->editUpdates( $text, $summary, $isminor, $now );
1156
1157                 $oldid = 0; # new article
1158                 $this->showArticle( $text, wfMsg( 'newarticle' ), false, $isminor, $now, $summary, $oldid, $revisionId );
1159
1160                 wfRunHooks( 'ArticleSaveComplete', array( &$this, &$wgUser, $text,
1161                         $summary, $isminor,
1162                         $watchthis, NULL ) );
1163                 wfProfileOut( $fname );
1164         }
1165
1166         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = '', $edittime = NULL) {
1167                 $this->replaceSection( $section, $text, $summary, $edittime );
1168         }
1169
1170         /**
1171          * @return string Complete article text, or null if error
1172          */
1173         function replaceSection($section, $text, $summary = '', $edittime = NULL) {
1174                 $fname = 'Article::replaceSection';
1175                 wfProfileIn( $fname );
1176
1177                 if ($section != '') {
1178                         if( is_null( $edittime ) ) {
1179                                 $rev = Revision::newFromTitle( $this->mTitle );
1180                         } else {
1181                                 $dbw =& wfGetDB( DB_MASTER );
1182                                 $rev = Revision::loadFromTimestamp( $dbw, $this->mTitle, $edittime );
1183                         }
1184                         if( is_null( $rev ) ) {
1185                                 wfDebug( "Article::replaceSection asked for bogus section (page: " .
1186                                         $this->getId() . "; section: $section; edittime: $edittime)\n" );
1187                                 return null;
1188                         }
1189                         $oldtext = $rev->getText();
1190
1191                         if($section=='new') {
1192                                 if($summary) $subject="== {$summary} ==\n\n";
1193                                 $text=$oldtext."\n\n".$subject.$text;
1194                         } else {
1195
1196                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
1197                                 # comments to be stripped as well)
1198                                 $striparray=array();
1199                                 $parser=new Parser();
1200                                 $parser->mOutputType=OT_WIKI;
1201                                 $parser->mOptions = new ParserOptions();
1202                                 $oldtext=$parser->strip($oldtext, $striparray, true);
1203
1204                                 # now that we can be sure that no pseudo-sections are in the source,
1205                                 # split it up
1206                                 # Unfortunately we can't simply do a preg_replace because that might
1207                                 # replace the wrong section, so we have to use the section counter instead
1208                                 $secs=preg_split('/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
1209                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
1210                                 $secs[$section*2]=$text."\n\n"; // replace with edited
1211
1212                                 # section 0 is top (intro) section
1213                                 if($section!=0) {
1214
1215                                         # headline of old section - we need to go through this section
1216                                         # to determine if there are any subsections that now need to
1217                                         # be erased, as the mother section has been replaced with
1218                                         # the text of all subsections.
1219                                         $headline=$secs[$section*2-1];
1220                                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
1221                                         $hlevel=$matches[1];
1222
1223                                         # determine headline level for wikimarkup headings
1224                                         if(strpos($hlevel,'=')!==false) {
1225                                                 $hlevel=strlen($hlevel);
1226                                         }
1227
1228                                         $secs[$section*2-1]=''; // erase old headline
1229                                         $count=$section+1;
1230                                         $break=false;
1231                                         while(!empty($secs[$count*2-1]) && !$break) {
1232
1233                                                 $subheadline=$secs[$count*2-1];
1234                                                 preg_match(
1235                                                  '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
1236                                                 $subhlevel=$matches[1];
1237                                                 if(strpos($subhlevel,'=')!==false) {
1238                                                         $subhlevel=strlen($subhlevel);
1239                                                 }
1240                                                 if($subhlevel > $hlevel) {
1241                                                         // erase old subsections
1242                                                         $secs[$count*2-1]='';
1243                                                         $secs[$count*2]='';
1244                                                 }
1245                                                 if($subhlevel <= $hlevel) {
1246                                                         $break=true;
1247                                                 }
1248                                                 $count++;
1249
1250                                         }
1251
1252                                 }
1253                                 $text=join('',$secs);
1254                                 # reinsert the stuff that we stripped out earlier
1255                                 $text=$parser->unstrip($text,$striparray);
1256                                 $text=$parser->unstripNoWiki($text,$striparray);
1257                         }
1258
1259                 }
1260                 wfProfileOut( $fname );
1261                 return $text;
1262         }
1263
1264         /**
1265          * Change an existing article. Puts the previous version back into the old table, updates RC
1266          * and all necessary caches, mostly via the deferred update array.
1267          *
1268          * It is possible to call this function from a command-line script, but note that you should
1269          * first set $wgUser, and clean up $wgDeferredUpdates after each edit.
1270          */
1271         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
1272                 global $wgOut, $wgUser, $wgDBtransactions, $wgMwRedir, $wgUseSquid;
1273                 global $wgPostCommitUpdateList, $wgUseFileCache;
1274
1275                 $fname = 'Article::updateArticle';
1276                 wfProfileIn( $fname );
1277                 $good = true;
1278
1279                 if( !wfRunHooks( 'ArticleSave', array( &$this, &$wgUser, &$text,
1280                         &$summary, &$minor,
1281                         &$watchthis, &$sectionanchor ) ) ) {
1282                         wfDebug( "$fname: ArticleSave hook aborted save!\n" );
1283                         wfProfileOut( $fname );
1284                         return false;
1285                 }
1286
1287                 $isminor = ( $minor && $wgUser->isLoggedIn() );
1288                 if ( $this->isRedirect( $text ) ) {
1289                         # Remove all content but redirect
1290                         # This could be done by reconstructing the redirect from a title given by
1291                         # Title::newFromRedirect(), but then we wouldn't know which synonym the user
1292                         # wants to see
1293                         if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ')[^\\n]+)/i', $text, $m ) ) {
1294                                 $redir = 1;
1295                                 $text = $m[1] . "\n";
1296                         }
1297                 }
1298                 else { $redir = 0; }
1299
1300                 $text = $this->preSaveTransform( $text );
1301                 $dbw =& wfGetDB( DB_MASTER );
1302                 $now = wfTimestampNow();
1303
1304                 # Update article, but only if changed.
1305
1306                 # It's important that we either rollback or complete, otherwise an attacker could
1307                 # overwrite cur entries by sending precisely timed user aborts. Random bored users
1308                 # could conceivably have the same effect, especially if cur is locked for long periods.
1309                 if( !$wgDBtransactions ) {
1310                         $userAbort = ignore_user_abort( true );
1311                 }
1312
1313                 $oldtext = $this->getContent( true );
1314                 $oldsize = strlen( $oldtext );
1315                 $newsize = strlen( $text );
1316                 $lastRevision = 0;
1317                 $revisionId = 0;
1318
1319                 if ( 0 != strcmp( $text, $oldtext ) ) {
1320                         $this->mGoodAdjustment = $this->isCountable( $text )
1321                           - $this->isCountable( $oldtext );
1322                         $this->mTotalAdjustment = 0;
1323                         $now = wfTimestampNow();
1324
1325                         $lastRevision = $dbw->selectField(
1326                                 'page', 'page_latest', array( 'page_id' => $this->getId() ) );
1327
1328                         $revision = new Revision( array(
1329                                 'page'       => $this->getId(),
1330                                 'comment'    => $summary,
1331                                 'minor_edit' => $isminor,
1332                                 'text'       => $text
1333                                 ) );
1334
1335                         $dbw->immediateCommit();
1336                         $dbw->begin();
1337                         $revisionId = $revision->insertOn( $dbw );
1338
1339                         # Update page
1340                         $ok = $this->updateRevisionOn( $dbw, $revision, $lastRevision );
1341
1342                         if( !$ok ) {
1343                                 /* Belated edit conflict! Run away!! */
1344                                 $good = false;
1345                                 $dbw->rollback();
1346                         } else {
1347                                 # Update recentchanges and purge cache and whatnot
1348                                 $bot = (int)($wgUser->isBot() || $forceBot);
1349                                 RecentChange::notifyEdit( $now, $this->mTitle, $isminor, $wgUser, $summary,
1350                                         $lastRevision, $this->getTimestamp(), $bot, '', $oldsize, $newsize,
1351                                         $revisionId );
1352                                 $dbw->commit();
1353
1354                                 // Update caches outside the main transaction
1355                                 Article::onArticleEdit( $this->mTitle );
1356                         }
1357                 }
1358
1359                 if( !$wgDBtransactions ) {
1360                         ignore_user_abort( $userAbort );
1361                 }
1362
1363                 if ( $good ) {
1364                         if ($watchthis) {
1365                                 if (!$this->mTitle->userIsWatching()) {
1366                                         $dbw->immediateCommit();
1367                                         $dbw->begin();
1368                                         $this->watch();
1369                                         $dbw->commit();
1370                                 }
1371                         } else {
1372                                 if ( $this->mTitle->userIsWatching() ) {
1373                                         $dbw->immediateCommit();
1374                                         $dbw->begin();
1375                                         $this->unwatch();
1376                                         $dbw->commit();
1377                                 }
1378                         }
1379                         # standard deferred updates
1380                         $this->editUpdates( $text, $summary, $minor, $now );
1381
1382
1383                         $this->showArticle( $text, wfMsg( 'updated' ), $sectionanchor, $isminor, $now, $summary, $lastRevision, $revisionId );
1384                 }
1385                 wfRunHooks( 'ArticleSaveComplete',
1386                         array( &$this, &$wgUser, $text,
1387                         $summary, $minor,
1388                         $watchthis, $sectionanchor ) );
1389                 wfProfileOut( $fname );
1390                 return $good;
1391         }
1392
1393         /**
1394          * After we've either updated or inserted the article, update
1395          * the link tables and redirect to the new page.
1396          */
1397         function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid, $newid ) {
1398                 global $wgUseDumbLinkUpdate, $wgAntiLockFlags, $wgOut, $wgUser, $wgLinkCache;
1399                 global $wgUseEnotif;
1400
1401                 $fname = 'Article::showArticle';
1402                 wfProfileIn( $fname );
1403
1404                 $wgLinkCache = new LinkCache();
1405
1406                 if ( !$wgUseDumbLinkUpdate ) {
1407                         # Preload links to reduce lock time
1408                         if ( $wgAntiLockFlags & ALF_PRELOAD_LINKS ) {
1409                                 $wgLinkCache->preFill( $this->mTitle );
1410                                 $wgLinkCache->clear();
1411                         }
1412                 }
1413
1414                 # Parse the text and save it to the parser cache
1415                 $wgOut = new OutputPage();
1416                 $wgOut->setParserOptions( ParserOptions::newFromUser( $wgUser ) );
1417                 $wgOut->setRevisionId( $newid );
1418                 $wgOut->addPrimaryWikiText( $text, $this );
1419
1420                 if ( !$wgUseDumbLinkUpdate ) {
1421                         # Move the current links back to the second register
1422                         $wgLinkCache->swapRegisters();
1423
1424                         # Get old version of link table to allow incremental link updates
1425                         # Lock this data now since it is needed for an update
1426                         $wgLinkCache->forUpdate( true );
1427                         $wgLinkCache->preFill( $this->mTitle );
1428
1429                         # Swap this old version back into its rightful place
1430                         $wgLinkCache->swapRegisters();
1431                 }
1432
1433                 if( $this->isRedirect( $text ) )
1434                         $r = 'redirect=no';
1435                 else
1436                         $r = '';
1437                 $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
1438
1439                 wfProfileOut( $fname );
1440         }
1441
1442         /**
1443          * Mark this particular edit as patrolled
1444          */
1445         function markpatrolled() {
1446                 global $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgUseRCPatrol, $wgUser;
1447                 $wgOut->setRobotpolicy( 'noindex,follow' );
1448
1449                 if ( !$wgUseRCPatrol )
1450                 {
1451                         $wgOut->errorpage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1452                         return;
1453                 }
1454                 if ( $wgUser->isAnon() )
1455                 {
1456                         $wgOut->loginToUse();
1457                         return;
1458                 }
1459                 if ( $wgOnlySysopsCanPatrol && !$wgUser->isAllowed('patrol') )
1460                 {
1461                         $wgOut->sysopRequired();
1462                         return;
1463                 }
1464                 $rcid = $wgRequest->getVal( 'rcid' );
1465                 if ( !is_null ( $rcid ) )
1466                 {
1467                         RecentChange::markPatrolled( $rcid );
1468                         $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
1469                         $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
1470
1471                         $rcTitle = Title::makeTitle( NS_SPECIAL, 'Recentchanges' );
1472                         $wgOut->returnToMain( false, $rcTitle->getPrefixedText() );
1473                 }
1474                 else
1475                 {
1476                         $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1477                 }
1478         }
1479
1480         /**
1481          * Validate function
1482          */
1483         function validate() {
1484                 global $wgOut, $wgUser, $wgRequest, $wgUseValidation;
1485
1486                 if ( !$wgUseValidation ) # Are we using article validation at all?
1487                 {
1488                         $wgOut->errorpage( "nosuchspecialpage", "nospecialpagetext" );
1489                         return ;
1490                 }
1491
1492                 $wgOut->setRobotpolicy( 'noindex,follow' );
1493                 $revision = $wgRequest->getVal( 'revision' );
1494
1495                 include_once ( "SpecialValidate.php" ) ; # The "Validation" class
1496
1497                 $v = new Validation ;
1498                 if ( $wgRequest->getVal ( "mode" , "" ) == "list" )
1499                         $t = $v->showList ( $this ) ;
1500                 else if ( $wgRequest->getVal ( "mode" , "" ) == "details" )
1501                         $t = $v->showDetails ( $this , $wgRequest->getVal( 'revision' ) ) ;
1502                 else
1503                         $t = $v->validatePageForm ( $this , $revision ) ;
1504
1505                 $wgOut->addHTML ( $t ) ;
1506         }
1507
1508         /**
1509          * Add this page to $wgUser's watchlist
1510          */
1511
1512         function watch() {
1513
1514                 global $wgUser, $wgOut;
1515
1516                 if ( $wgUser->isAnon() ) {
1517                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1518                         return;
1519                 }
1520                 if ( wfReadOnly() ) {
1521                         $wgOut->readOnlyPage();
1522                         return;
1523                 }
1524
1525                 if (wfRunHooks('WatchArticle', array(&$wgUser, &$this))) {
1526
1527                         $wgUser->addWatch( $this->mTitle );
1528                         $wgUser->saveSettings();
1529
1530                         wfRunHooks('WatchArticleComplete', array(&$wgUser, &$this));
1531
1532                         $wgOut->setPagetitle( wfMsg( 'addedwatch' ) );
1533                         $wgOut->setRobotpolicy( 'noindex,follow' );
1534
1535                         $link = $this->mTitle->getPrefixedText();
1536                         $text = wfMsg( 'addedwatchtext', $link );
1537                         $wgOut->addWikiText( $text );
1538                 }
1539
1540                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1541         }
1542
1543         /**
1544          * Stop watching a page
1545          */
1546
1547         function unwatch() {
1548
1549                 global $wgUser, $wgOut;
1550
1551                 if ( $wgUser->isAnon() ) {
1552                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1553                         return;
1554                 }
1555                 if ( wfReadOnly() ) {
1556                         $wgOut->readOnlyPage();
1557                         return;
1558                 }
1559
1560                 if (wfRunHooks('UnwatchArticle', array(&$wgUser, &$this))) {
1561
1562                         $wgUser->removeWatch( $this->mTitle );
1563                         $wgUser->saveSettings();
1564
1565                         wfRunHooks('UnwatchArticleComplete', array(&$wgUser, &$this));
1566
1567                         $wgOut->setPagetitle( wfMsg( 'removedwatch' ) );
1568                         $wgOut->setRobotpolicy( 'noindex,follow' );
1569
1570                         $link = $this->mTitle->getPrefixedText();
1571                         $text = wfMsg( 'removedwatchtext', $link );
1572                         $wgOut->addWikiText( $text );
1573                 }
1574
1575                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1576         }
1577
1578         /**
1579          * protect a page
1580          */
1581         function protect( $limit = 'sysop' ) {
1582                 global $wgUser, $wgOut, $wgRequest;
1583
1584                 if ( ! $wgUser->isAllowed('protect') ) {
1585                         $wgOut->sysopRequired();
1586                         return;
1587                 }
1588
1589                 // bug 2261
1590                 if ( $this->mTitle->isProtected() && $limit == 'sysop' ) {
1591                         $this->view();
1592                         return;
1593                 }
1594
1595                 if ( wfReadOnly() ) {
1596                         $wgOut->readOnlyPage();
1597                         return;
1598                 }
1599
1600                 $id = $this->mTitle->getArticleID();
1601                 if ( 0 == $id ) {
1602                         $wgOut->fatalError( wfMsg( 'badarticleerror' ) );
1603                         return;
1604                 }
1605
1606                 $confirm = $wgRequest->wasPosted() &&
1607                         $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
1608                 $moveonly = $wgRequest->getBool( 'wpMoveOnly' );
1609                 $reason = $wgRequest->getText( 'wpReasonProtect' );
1610
1611                 if ( $confirm ) {
1612                         $dbw =& wfGetDB( DB_MASTER );
1613                         $dbw->update( 'page',
1614                                 array( /* SET */
1615                                         'page_touched' => $dbw->timestamp(),
1616                                         'page_restrictions' => (string)$limit
1617                                 ), array( /* WHERE */
1618                                         'page_id' => $id
1619                                 ), 'Article::protect'
1620                         );
1621
1622                         $restrictions = "move=" . $limit;
1623                         if( !$moveonly ) {
1624                                 $restrictions .= ":edit=" . $limit;
1625                         }
1626                         if (wfRunHooks('ArticleProtect', array(&$this, &$wgUser, $limit == 'sysop', $reason, $moveonly))) {
1627
1628                                 $dbw =& wfGetDB( DB_MASTER );
1629                                 $dbw->update( 'page',
1630                                                           array( /* SET */
1631                                                                          'page_touched' => $dbw->timestamp(),
1632                                                                          'page_restrictions' => $restrictions
1633                                                                          ), array( /* WHERE */
1634                                                                                            'page_id' => $id
1635                                                                                            ), 'Article::protect'
1636                                                           );
1637
1638                                 wfRunHooks('ArticleProtectComplete', array(&$this, &$wgUser, $limit == 'sysop', $reason, $moveonly));
1639
1640                                 $log = new LogPage( 'protect' );
1641                                 if ( $limit === '' ) {
1642                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1643                                 } else {
1644                                         $log->addEntry( 'protect', $this->mTitle, $reason );
1645                                 }
1646                                 $wgOut->redirect( $this->mTitle->getFullURL() );
1647                         }
1648                         return;
1649                 } else {
1650                         return $this->confirmProtect( '', '', $limit );
1651                 }
1652         }
1653
1654         /**
1655          * Output protection confirmation dialog
1656          */
1657         function confirmProtect( $par, $reason, $limit = 'sysop'  ) {
1658                 global $wgOut, $wgUser;
1659
1660                 wfDebug( "Article::confirmProtect\n" );
1661
1662                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1663                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1664
1665                 $check = '';
1666                 $protcom = '';
1667                 $moveonly = '';
1668
1669                 if ( $limit === '' ) {
1670                         $wgOut->setPageTitle( wfMsg( 'confirmunprotect' ) );
1671                         $wgOut->setSubtitle( wfMsg( 'unprotectsub', $sub ) );
1672                         $wgOut->addWikiText( wfMsg( 'confirmunprotecttext' ) );
1673                         $protcom = htmlspecialchars( wfMsg( 'unprotectcomment' ) );
1674                         $formaction = $this->mTitle->escapeLocalURL( 'action=unprotect' . $par );
1675                 } else {
1676                         $wgOut->setPageTitle( wfMsg( 'confirmprotect' ) );
1677                         $wgOut->setSubtitle( wfMsg( 'protectsub', $sub ) );
1678                         $wgOut->addWikiText( wfMsg( 'confirmprotecttext' ) );
1679                         $moveonly = wfMsg( 'protectmoveonly' ) ; // add it using addWikiText to prevent xss. bug:3991
1680                         $protcom = htmlspecialchars( wfMsg( 'protectcomment' ) );
1681                         $formaction = $this->mTitle->escapeLocalURL( 'action=protect' . $par );
1682                 }
1683
1684                 $confirm = htmlspecialchars( wfMsg( 'protectpage' ) );
1685                 $token = htmlspecialchars( $wgUser->editToken() );
1686
1687                 $wgOut->addHTML( "
1688 <form id='protectconfirm' method='post' action=\"{$formaction}\">
1689         <table border='0'>
1690                 <tr>
1691                         <td align='right'>
1692                                 <label for='wpReasonProtect'>{$protcom}:</label>
1693                         </td>
1694                         <td align='left'>
1695                                 <input type='text' size='60' name='wpReasonProtect' id='wpReasonProtect' value=\"" . htmlspecialchars( $reason ) . "\" />
1696                         </td>
1697                 </tr>" );
1698                 if($moveonly != '') {
1699                         $wgOut->AddHTML( "
1700                 <tr>
1701                         <td align='right'>
1702                                 <input type='checkbox' name='wpMoveOnly' value='1' id='wpMoveOnly' />
1703                         </td>
1704                         <td align='left'>
1705                                 <label for='wpMoveOnly'> ");
1706                         $wgOut->addWikiText( $moveonly ); // bug 3991
1707                         $wgOut->addHTML( "
1708                                 </label>
1709                         </td>
1710                 </tr> " );
1711                 }
1712                 $wgOut->addHTML( "
1713                 <tr>
1714                         <td>&nbsp;</td>
1715                         <td>
1716                                 <input type='submit' name='wpConfirmProtectB' value=\"{$confirm}\" />
1717                         </td>
1718                 </tr>
1719         </table>
1720         <input type='hidden' name='wpEditToken' value=\"{$token}\" />
1721 </form>" );
1722
1723                 $wgOut->returnToMain( false );
1724         }
1725
1726         /**
1727          * Unprotect the pages
1728          */
1729         function unprotect() {
1730                 // bug 2261
1731                 if ( $this->mTitle->isProtected() ) {
1732                         return $this->protect( '' );
1733                 } else {
1734                         $this->view();
1735                         return;
1736                 }
1737         }
1738
1739         /*
1740          * UI entry point for page deletion
1741          */
1742         function delete() {
1743                 global $wgUser, $wgOut, $wgRequest;
1744                 $fname = 'Article::delete';
1745                 $confirm = $wgRequest->wasPosted() &&
1746                         $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
1747                 $reason = $wgRequest->getText( 'wpReason' );
1748
1749                 # This code desperately needs to be totally rewritten
1750
1751                 # Check permissions
1752                 if( ( !$wgUser->isAllowed( 'delete' ) ) ) {
1753                         $wgOut->sysopRequired();
1754                         return;
1755                 }
1756                 if( wfReadOnly() ) {
1757                         $wgOut->readOnlyPage();
1758                         return;
1759                 }
1760
1761                 # Better double-check that it hasn't been deleted yet!
1762                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1763                 if( !$this->mTitle->exists() ) {
1764                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1765                         return;
1766                 }
1767
1768                 if( $confirm ) {
1769                         $this->doDelete( $reason );
1770                         return;
1771                 }
1772
1773                 # determine whether this page has earlier revisions
1774                 # and insert a warning if it does
1775                 # we select the text because it might be useful below
1776                 $dbr =& $this->getDB();
1777                 $ns = $this->mTitle->getNamespace();
1778                 $title = $this->mTitle->getDBkey();
1779                 $revisions = $dbr->select( array( 'page', 'revision' ),
1780                         array( 'rev_id', 'rev_user_text' ),
1781                         array(
1782                                 'page_namespace' => $ns,
1783                                 'page_title' => $title,
1784                                 'rev_page = page_id'
1785                         ), $fname, $this->getSelectOptions( array( 'ORDER BY' => 'rev_timestamp DESC' ) )
1786                 );
1787
1788                 if( $dbr->numRows( $revisions ) > 1 && !$confirm ) {
1789                         $skin=$wgUser->getSkin();
1790                         $wgOut->addHTML('<b>'.wfMsg('historywarning'));
1791                         $wgOut->addHTML( $skin->historyLink() .'</b>');
1792                 }
1793
1794                 # Fetch cur_text
1795                 $rev = Revision::newFromTitle( $this->mTitle );
1796
1797                 # Fetch name(s) of contributors
1798                 $rev_name = '';
1799                 $all_same_user = true;
1800                 while( $row = $dbr->fetchObject( $revisions ) ) {
1801                         if( $rev_name != '' && $rev_name != $row->rev_user_text ) {
1802                                 $all_same_user = false;
1803                         } else {
1804                                 $rev_name = $row->rev_user_text;
1805                         }
1806                 }
1807
1808                 if( !is_null( $rev ) ) {
1809                         # if this is a mini-text, we can paste part of it into the deletion reason
1810                         $text = $rev->getText();
1811
1812                         #if this is empty, an earlier revision may contain "useful" text
1813                         $blanked = false;
1814                         if( $text == '' ) {
1815                                 $prev = $rev->getPrevious();
1816                                 if( $prev ) {
1817                                         $text = $prev->getText();
1818                                         $blanked = true;
1819                                 }
1820                         }
1821
1822                         $length = strlen( $text );
1823
1824                         # this should not happen, since it is not possible to store an empty, new
1825                         # page. Let's insert a standard text in case it does, though
1826                         if( $length == 0 && $reason === '' ) {
1827                                 $reason = wfMsgForContent( 'exblank' );
1828                         }
1829
1830                         if( $length < 500 && $reason === '' ) {
1831                                 # comment field=255, let's grep the first 150 to have some user
1832                                 # space left
1833                                 global $wgContLang;
1834                                 $text = $wgContLang->truncate( $text, 150, '...' );
1835
1836                                 # let's strip out newlines
1837                                 $text = preg_replace( "/[\n\r]/", '', $text );
1838
1839                                 if( !$blanked ) {
1840                                         if( !$all_same_user ) {
1841                                                 $reason = wfMsgForContent( 'excontent', $text );
1842                                         } else {
1843                                                 $reason = wfMsgForContent( 'excontentauthor', $text, $rev_name );
1844                                         }
1845                                 } else {
1846                                         $reason = wfMsgForContent( 'exbeforeblank', $text );
1847                                 }
1848                         }
1849                 }
1850
1851                 return $this->confirmDelete( '', $reason );
1852         }
1853
1854         /**
1855          * Output deletion confirmation dialog
1856          */
1857         function confirmDelete( $par, $reason ) {
1858                 global $wgOut, $wgUser;
1859
1860                 wfDebug( "Article::confirmDelete\n" );
1861
1862                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1863                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1864                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1865                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1866
1867                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1868
1869                 $confirm = htmlspecialchars( wfMsg( 'deletepage' ) );
1870                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1871                 $token = htmlspecialchars( $wgUser->editToken() );
1872
1873                 $wgOut->addHTML( "
1874 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1875         <table border='0'>
1876                 <tr>
1877                         <td align='right'>
1878                                 <label for='wpReason'>{$delcom}:</label>
1879                         </td>
1880                         <td align='left'>
1881                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1882                         </td>
1883                 </tr>
1884                 <tr>
1885                         <td>&nbsp;</td>
1886                         <td>
1887                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1888                         </td>
1889                 </tr>
1890         </table>
1891         <input type='hidden' name='wpEditToken' value=\"{$token}\" />
1892 </form>\n" );
1893
1894                 $wgOut->returnToMain( false );
1895         }
1896
1897
1898         /**
1899          * Perform a deletion and output success or failure messages
1900          */
1901         function doDelete( $reason ) {
1902                 global $wgOut, $wgUser, $wgContLang;
1903                 $fname = 'Article::doDelete';
1904                 wfDebug( $fname."\n" );
1905
1906                 if (wfRunHooks('ArticleDelete', array(&$this, &$wgUser, &$reason))) {
1907                         if ( $this->doDeleteArticle( $reason ) ) {
1908                                 $deleted = $this->mTitle->getPrefixedText();
1909
1910                                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1911                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1912
1913                                 $loglink = '[[Special:Log/delete|' . wfMsg( 'deletionlog' ) . ']]';
1914                                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
1915
1916                                 $wgOut->addWikiText( $text );
1917                                 $wgOut->returnToMain( false );
1918                                 wfRunHooks('ArticleDeleteComplete', array(&$this, &$wgUser, $reason));
1919                         } else {
1920                                 $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1921                         }
1922                 }
1923         }
1924
1925         /**
1926          * Back-end article deletion
1927          * Deletes the article with database consistency, writes logs, purges caches
1928          * Returns success
1929          */
1930         function doDeleteArticle( $reason ) {
1931                 global $wgUser, $wgUseSquid, $wgDeferredUpdateList;
1932                 global $wgPostCommitUpdateList, $wgUseTrackbacks;
1933
1934                 $fname = 'Article::doDeleteArticle';
1935                 wfDebug( $fname."\n" );
1936
1937                 $dbw =& wfGetDB( DB_MASTER );
1938                 $ns = $this->mTitle->getNamespace();
1939                 $t = $this->mTitle->getDBkey();
1940                 $id = $this->mTitle->getArticleID();
1941
1942                 if ( $t == '' || $id == 0 ) {
1943                         return false;
1944                 }
1945
1946                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ), -1 );
1947                 array_push( $wgDeferredUpdateList, $u );
1948
1949                 $linksTo = $this->mTitle->getLinksTo();
1950
1951                 # Squid purging
1952                 if ( $wgUseSquid ) {
1953                         $urls = array(
1954                                 $this->mTitle->getInternalURL(),
1955                                 $this->mTitle->getInternalURL( 'history' )
1956                         );
1957
1958                         $u = SquidUpdate::newFromTitles( $linksTo, $urls );
1959                         array_push( $wgPostCommitUpdateList, $u );
1960
1961                 }
1962
1963                 # Client and file cache invalidation
1964                 Title::touchArray( $linksTo );
1965
1966
1967                 // For now, shunt the revision data into the archive table.
1968                 // Text is *not* removed from the text table; bulk storage
1969                 // is left intact to avoid breaking block-compression or
1970                 // immutable storage schemes.
1971                 //
1972                 // For backwards compatibility, note that some older archive
1973                 // table entries will have ar_text and ar_flags fields still.
1974                 //
1975                 // In the future, we may keep revisions and mark them with
1976                 // the rev_deleted field, which is reserved for this purpose.
1977                 $dbw->insertSelect( 'archive', array( 'page', 'revision' ),
1978                         array(
1979                                 'ar_namespace'  => 'page_namespace',
1980                                 'ar_title'      => 'page_title',
1981                                 'ar_comment'    => 'rev_comment',
1982                                 'ar_user'       => 'rev_user',
1983                                 'ar_user_text'  => 'rev_user_text',
1984                                 'ar_timestamp'  => 'rev_timestamp',
1985                                 'ar_minor_edit' => 'rev_minor_edit',
1986                                 'ar_rev_id'     => 'rev_id',
1987                                 'ar_text_id'    => 'rev_text_id',
1988                         ), array(
1989                                 'page_id' => $id,
1990                                 'page_id = rev_page'
1991                         ), $fname
1992                 );
1993
1994                 # Now that it's safely backed up, delete it
1995                 $dbw->delete( 'revision', array( 'rev_page' => $id ), $fname );
1996                 $dbw->delete( 'page', array( 'page_id' => $id ), $fname);
1997
1998                 if ($wgUseTrackbacks)
1999                         $dbw->delete( 'trackbacks', array( 'tb_page' => $id ), $fname );
2000
2001                 # Clean up recentchanges entries...
2002                 $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), $fname );
2003
2004                 # Finally, clean up the link tables
2005                 $t = $this->mTitle->getPrefixedDBkey();
2006
2007                 Article::onArticleDelete( $this->mTitle );
2008
2009                 # Delete outgoing links
2010                 $dbw->delete( 'pagelinks', array( 'pl_from' => $id ) );
2011                 $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
2012                 $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
2013
2014                 # Log the deletion
2015                 $log = new LogPage( 'delete' );
2016                 $log->addEntry( 'delete', $this->mTitle, $reason );
2017
2018                 # Clear the cached article id so the interface doesn't act like we exist
2019                 $this->mTitle->resetArticleID( 0 );
2020                 $this->mTitle->mArticleID = 0;
2021                 return true;
2022         }
2023
2024         /**
2025          * Revert a modification
2026          */
2027         function rollback() {
2028                 global $wgUser, $wgOut, $wgRequest, $wgUseRCPatrol;
2029                 $fname = 'Article::rollback';
2030
2031                 if ( ! $wgUser->isAllowed('rollback') ) {
2032                         $wgOut->sysopRequired();
2033                         return;
2034                 }
2035                 if ( wfReadOnly() ) {
2036                         $wgOut->readOnlyPage( $this->getContent( true ) );
2037                         return;
2038                 }
2039                 if( !$wgUser->matchEditToken( $wgRequest->getVal( 'token' ),
2040                         array( $this->mTitle->getPrefixedText(),
2041                                 $wgRequest->getVal( 'from' ) )  ) ) {
2042                         $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
2043                         $wgOut->addWikiText( wfMsg( 'sessionfailure' ) );
2044                         return;
2045                 }
2046                 $dbw =& wfGetDB( DB_MASTER );
2047
2048                 # Enhanced rollback, marks edits rc_bot=1
2049                 $bot = $wgRequest->getBool( 'bot' );
2050
2051                 # Replace all this user's current edits with the next one down
2052                 $tt = $this->mTitle->getDBKey();
2053                 $n = $this->mTitle->getNamespace();
2054
2055                 # Get the last editor, lock table exclusively
2056                 $dbw->begin();
2057                 $current = Revision::newFromTitle( $this->mTitle );
2058                 if( is_null( $current ) ) {
2059                         # Something wrong... no page?
2060                         $dbw->rollback();
2061                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
2062                         return;
2063                 }
2064
2065                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
2066                 if( $from != $current->getUserText() ) {
2067                         $wgOut->setPageTitle( wfMsg('rollbackfailed') );
2068                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
2069                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
2070                                 htmlspecialchars( $from ),
2071                                 htmlspecialchars( $current->getUserText() ) ) );
2072                         if( $current->getComment() != '') {
2073                                 $wgOut->addHTML(
2074                                         wfMsg( 'editcomment',
2075                                         htmlspecialchars( $current->getComment() ) ) );
2076                         }
2077                         return;
2078                 }
2079
2080                 # Get the last edit not by this guy
2081                 $user = intval( $current->getUser() );
2082                 $user_text = $dbw->addQuotes( $current->getUserText() );
2083                 $s = $dbw->selectRow( 'revision',
2084                         array( 'rev_id', 'rev_timestamp' ),
2085                         array(
2086                                 'rev_page' => $current->getPage(),
2087                                 "rev_user <> {$user} OR rev_user_text <> {$user_text}"
2088                         ), $fname,
2089                         array(
2090                                 'USE INDEX' => 'page_timestamp',
2091                                 'ORDER BY'  => 'rev_timestamp DESC' )
2092                         );
2093                 if( $s === false ) {
2094                         # Something wrong
2095                         $dbw->rollback();
2096                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
2097                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
2098                         return;
2099                 }
2100
2101                 $set = array();
2102                 if ( $bot ) {
2103                         # Mark all reverted edits as bot
2104                         $set['rc_bot'] = 1;
2105                 }
2106                 if ( $wgUseRCPatrol ) {
2107                         # Mark all reverted edits as patrolled
2108                         $set['rc_patrolled'] = 1;
2109                 }
2110
2111                 if ( $set ) {
2112                         $dbw->update( 'recentchanges', $set,
2113                                 array( /* WHERE */
2114                                         'rc_cur_id'    => $current->getPage(),
2115                                         'rc_user_text' => $current->getUserText(),
2116                                         "rc_timestamp > '{$s->rev_timestamp}'",
2117                                 ), $fname
2118                         );
2119                 }
2120
2121                 # Get the edit summary
2122                 $target = Revision::newFromId( $s->rev_id );
2123                 $newComment = wfMsgForContent( 'revertpage', $target->getUserText(), $from );
2124                 $newComment = $wgRequest->getText( 'summary', $newComment );
2125
2126                 # Save it!
2127                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
2128                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
2129                 $wgOut->addHTML( '<h2>' . htmlspecialchars( $newComment ) . "</h2>\n<hr />\n" );
2130
2131                 $this->updateArticle( $target->getText(), $newComment, 1, $this->mTitle->userIsWatching(), $bot );
2132                 Article::onArticleEdit( $this->mTitle );
2133
2134                 $dbw->commit();
2135                 $wgOut->returnToMain( false );
2136         }
2137
2138
2139         /**
2140          * Do standard deferred updates after page view
2141          * @private
2142          */
2143         function viewUpdates() {
2144                 global $wgDeferredUpdateList;
2145
2146                 if ( 0 != $this->getID() ) {
2147                         global $wgDisableCounters;
2148                         if( !$wgDisableCounters ) {
2149                                 Article::incViewCount( $this->getID() );
2150                                 $u = new SiteStatsUpdate( 1, 0, 0 );
2151                                 array_push( $wgDeferredUpdateList, $u );
2152                         }
2153                 }
2154
2155                 # Update newtalk / watchlist notification status
2156                 global $wgUser;
2157                 $wgUser->clearNotification( $this->mTitle );
2158         }
2159
2160         /**
2161          * Do standard deferred updates after page edit.
2162          * Every 1000th edit, prune the recent changes table.
2163          * @private
2164          * @param string $text
2165          */
2166         function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange) {
2167                 global $wgDeferredUpdateList, $wgMessageCache, $wgUser;
2168
2169                 if ( wfRunHooks( 'ArticleEditUpdatesDeleteFromRecentchanges', array( &$this ) ) ) {
2170                         wfSeedRandom();
2171                         if ( 0 == mt_rand( 0, 999 ) ) {
2172                                 # Periodically flush old entries from the recentchanges table.
2173                                 global $wgRCMaxAge;
2174
2175                                 $dbw =& wfGetDB( DB_MASTER );
2176                                 $cutoff = $dbw->timestamp( time() - $wgRCMaxAge );
2177                                 $recentchanges = $dbw->tableName( 'recentchanges' );
2178                                 $sql = "DELETE FROM $recentchanges WHERE rc_timestamp < '{$cutoff}'";
2179                                 $dbw->query( $sql );
2180                         }
2181                 }
2182
2183                 $id = $this->getID();
2184                 $title = $this->mTitle->getPrefixedDBkey();
2185                 $shortTitle = $this->mTitle->getDBkey();
2186
2187                 if ( 0 != $id ) {
2188                         $u = new LinksUpdate( $id, $title );
2189                         array_push( $wgDeferredUpdateList, $u );
2190                         $u = new SiteStatsUpdate( 0, 1, $this->mGoodAdjustment, $this->mTotalAdjustment );
2191                         array_push( $wgDeferredUpdateList, $u );
2192                         $u = new SearchUpdate( $id, $title, $text );
2193                         array_push( $wgDeferredUpdateList, $u );
2194
2195                         # If this is another user's talk page, update newtalk
2196
2197                         if ($this->mTitle->getNamespace() == NS_USER_TALK && $shortTitle != $wgUser->getName()) {
2198                                 $other = User::newFromName( $shortTitle );
2199                                 if( is_null( $other ) && User::isIP( $shortTitle ) ) {
2200                                         // An anonymous user
2201                                         $other = new User();
2202                                         $other->setName( $shortTitle );
2203                                 }
2204                                 if( $other ) {
2205                                         $other->setNewtalk( true );
2206                                 }
2207                         }
2208
2209                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
2210                                 $wgMessageCache->replace( $shortTitle, $text );
2211                         }
2212                 }
2213         }
2214
2215         /**
2216          * @todo document this function
2217          * @private
2218          * @param string $oldid         Revision ID of this article revision
2219          */
2220         function setOldSubtitle( $oldid=0 ) {
2221                 global $wgLang, $wgOut, $wgUser;
2222
2223                 $current = ( $oldid == $this->mLatest );
2224                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
2225                 $sk = $wgUser->getSkin();
2226                 $lnk = $current
2227                         ? wfMsg( 'currentrevisionlink' )
2228                         : $lnk = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
2229                 $prevlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid );
2230                 $nextlink = $current
2231                         ? wfMsg( 'nextrevision' )
2232                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
2233                 $r = wfMsg( 'revisionasofwithlink', $td, $lnk, $prevlink, $nextlink );
2234                 $wgOut->setSubtitle( $r );
2235         }
2236
2237         /**
2238          * This function is called right before saving the wikitext,
2239          * so we can do things like signatures and links-in-context.
2240          *
2241          * @param string $text
2242          */
2243         function preSaveTransform( $text ) {
2244                 global $wgParser, $wgUser;
2245                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
2246         }
2247
2248         /* Caching functions */
2249
2250         /**
2251          * checkLastModified returns true if it has taken care of all
2252          * output to the client that is necessary for this request.
2253          * (that is, it has sent a cached version of the page)
2254          */
2255         function tryFileCache() {
2256                 static $called = false;
2257                 if( $called ) {
2258                         wfDebug( " tryFileCache() -- called twice!?\n" );
2259                         return;
2260                 }
2261                 $called = true;
2262                 if($this->isFileCacheable()) {
2263                         $touched = $this->mTouched;
2264                         $cache = new CacheManager( $this->mTitle );
2265                         if($cache->isFileCacheGood( $touched )) {
2266                                 global $wgOut;
2267                                 wfDebug( " tryFileCache() - about to load\n" );
2268                                 $cache->loadFromFileCache();
2269                                 return true;
2270                         } else {
2271                                 wfDebug( " tryFileCache() - starting buffer\n" );
2272                                 ob_start( array(&$cache, 'saveToFileCache' ) );
2273                         }
2274                 } else {
2275                         wfDebug( " tryFileCache() - not cacheable\n" );
2276                 }
2277         }
2278
2279         /**
2280          * Check if the page can be cached
2281          * @return bool
2282          */
2283         function isFileCacheable() {
2284                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
2285                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
2286
2287                 return $wgUseFileCache
2288                         and (!$wgShowIPinHeader)
2289                         and ($this->getID() != 0)
2290                         and ($wgUser->isAnon())
2291                         and (!$wgUser->getNewtalk())
2292                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
2293                         and (empty( $action ) || $action == 'view')
2294                         and (!isset($oldid))
2295                         and (!isset($diff))
2296                         and (!isset($redirect))
2297                         and (!isset($printable))
2298                         and (!$this->mRedirectedFrom);
2299         }
2300
2301         /**
2302          * Loads cur_touched and returns a value indicating if it should be used
2303          *
2304          */
2305         function checkTouched() {
2306                 $fname = 'Article::checkTouched';
2307                 if( !$this->mDataLoaded ) {
2308                         $dbr =& $this->getDB();
2309                         $data = $this->pageDataFromId( $dbr, $this->getId() );
2310                         if( $data ) {
2311                                 $this->loadPageData( $data );
2312                         }
2313                 }
2314                 return !$this->mIsRedirect;
2315         }
2316
2317         /**
2318          * Edit an article without doing all that other stuff
2319          * The article must already exist; link tables etc
2320          * are not updated, caches are not flushed.
2321          *
2322          * @param string $text text submitted
2323          * @param string $comment comment submitted
2324          * @param bool $minor whereas it's a minor modification
2325          */
2326         function quickEdit( $text, $comment = '', $minor = 0 ) {
2327                 $fname = 'Article::quickEdit';
2328                 wfProfileIn( $fname );
2329
2330                 $dbw =& wfGetDB( DB_MASTER );
2331                 $dbw->begin();
2332                 $revision = new Revision( array(
2333                         'page'       => $this->getId(),
2334                         'text'       => $text,
2335                         'comment'    => $comment,
2336                         'minor_edit' => $minor ? 1 : 0,
2337                         ) );
2338                 $revisionId = $revision->insertOn( $dbw );
2339                 $this->updateRevisionOn( $dbw, $revision );
2340                 $dbw->commit();
2341
2342                 wfProfileOut( $fname );
2343         }
2344
2345         /**
2346          * Used to increment the view counter
2347          *
2348          * @static
2349          * @param integer $id article id
2350          */
2351         function incViewCount( $id ) {
2352                 $id = intval( $id );
2353                 global $wgHitcounterUpdateFreq;
2354
2355                 $dbw =& wfGetDB( DB_MASTER );
2356                 $pageTable = $dbw->tableName( 'page' );
2357                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
2358                 $acchitsTable = $dbw->tableName( 'acchits' );
2359
2360                 if( $wgHitcounterUpdateFreq <= 1 ){ //
2361                         $dbw->query( "UPDATE $pageTable SET page_counter = page_counter + 1 WHERE page_id = $id" );
2362                         return;
2363                 }
2364
2365                 # Not important enough to warrant an error page in case of failure
2366                 $oldignore = $dbw->ignoreErrors( true );
2367
2368                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2369
2370                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2371                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2372                         # Most of the time (or on SQL errors), skip row count check
2373                         $dbw->ignoreErrors( $oldignore );
2374                         return;
2375                 }
2376
2377                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2378                 $row = $dbw->fetchObject( $res );
2379                 $rown = intval( $row->n );
2380                 if( $rown >= $wgHitcounterUpdateFreq ){
2381                         wfProfileIn( 'Article::incViewCount-collect' );
2382                         $old_user_abort = ignore_user_abort( true );
2383
2384                         $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2385                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable TYPE=HEAP ".
2386                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2387                                 'GROUP BY hc_id');
2388                         $dbw->query("DELETE FROM $hitcounterTable");
2389                         $dbw->query('UNLOCK TABLES');
2390                         $dbw->query("UPDATE $pageTable,$acchitsTable SET page_counter=page_counter + hc_n ".
2391                                 'WHERE page_id = hc_id');
2392                         $dbw->query("DROP TABLE $acchitsTable");
2393
2394                         ignore_user_abort( $old_user_abort );
2395                         wfProfileOut( 'Article::incViewCount-collect' );
2396                 }
2397                 $dbw->ignoreErrors( $oldignore );
2398         }
2399
2400         /**#@+
2401          * The onArticle*() functions are supposed to be a kind of hooks
2402          * which should be called whenever any of the specified actions
2403          * are done.
2404          *
2405          * This is a good place to put code to clear caches, for instance.
2406          *
2407          * This is called on page move and undelete, as well as edit
2408          * @static
2409          * @param $title_obj a title object
2410          */
2411
2412         function onArticleCreate($title_obj) {
2413                 global $wgUseSquid, $wgPostCommitUpdateList;
2414
2415                 $title_obj->touchLinks();
2416                 $titles = $title_obj->getLinksTo();
2417
2418                 # Purge squid
2419                 if ( $wgUseSquid ) {
2420                         $urls = $title_obj->getSquidURLs();
2421                         foreach ( $titles as $linkTitle ) {
2422                                 $urls[] = $linkTitle->getInternalURL();
2423                         }
2424                         $u = new SquidUpdate( $urls );
2425                         array_push( $wgPostCommitUpdateList, $u );
2426                 }
2427         }
2428
2429         function onArticleDelete( $title ) {
2430                 global $wgMessageCache;
2431
2432                 $title->touchLinks();
2433
2434                 if( $title->getNamespace() == NS_MEDIAWIKI) {
2435                         $wgMessageCache->replace( $title->getDBkey(), false );
2436                 }
2437         }
2438
2439         /**
2440          * Purge caches on page update etc
2441          */
2442         function onArticleEdit( $title ) {
2443                 global $wgUseSquid, $wgPostCommitUpdateList, $wgUseFileCache;
2444
2445                 $urls = array();
2446
2447                 // Template namespace? Purge all articles linking here.
2448                 // FIXME: When a templatelinks table arrives, use it for all includes.
2449                 if ( $title->getNamespace() == NS_TEMPLATE) {
2450                         $titles = $title->getLinksTo();
2451                         Title::touchArray( $titles );
2452                         if ( $wgUseSquid ) {
2453                                 foreach ( $titles as $link ) {
2454                                         $urls[] = $link->getInternalURL();
2455                                 }
2456                         }
2457                 }
2458
2459                 # Squid updates
2460                 if ( $wgUseSquid ) {
2461                         $urls = array_merge( $urls, $title->getSquidURLs() );
2462                         $u = new SquidUpdate( $urls );
2463                         array_push( $wgPostCommitUpdateList, $u );
2464                 }
2465
2466                 # File cache
2467                 if ( $wgUseFileCache ) {
2468                         $cm = new CacheManager( $title );
2469                         @unlink( $cm->fileCacheName() );
2470                 }
2471         }
2472
2473         /**#@-*/
2474
2475         /**
2476          * Info about this page
2477          * Called for ?action=info when $wgAllowPageInfo is on.
2478          *
2479          * @access public
2480          */
2481         function info() {
2482                 global $wgLang, $wgOut, $wgAllowPageInfo, $wgUser;
2483                 $fname = 'Article::info';
2484
2485                 if ( !$wgAllowPageInfo ) {
2486                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
2487                         return;
2488                 }
2489
2490                 $page = $this->mTitle->getSubjectPage();
2491
2492                 $wgOut->setPagetitle( $page->getPrefixedText() );
2493                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
2494
2495                 # first, see if the page exists at all.
2496                 $exists = $page->getArticleId() != 0;
2497                 if( !$exists ) {
2498                         $wgOut->addHTML( wfMsg( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon' ) );
2499                 } else {
2500                         $dbr =& $this->getDB( DB_SLAVE );
2501                         $wl_clause = array(
2502                                 'wl_title'     => $page->getDBkey(),
2503                                 'wl_namespace' => $page->getNamespace() );
2504                         $numwatchers = $dbr->selectField(
2505                                 'watchlist',
2506                                 'COUNT(*)',
2507                                 $wl_clause,
2508                                 $fname,
2509                                 $this->getSelectOptions() );
2510
2511                         $pageInfo = $this->pageCountInfo( $page );
2512                         $talkInfo = $this->pageCountInfo( $page->getTalkPage() );
2513
2514                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $wgLang->formatNum( $numwatchers ) ) . '</li>' );
2515                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $wgLang->formatNum( $pageInfo['edits'] ) ) . '</li>');
2516                         if( $talkInfo ) {
2517                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $wgLang->formatNum( $talkInfo['edits'] ) ) . '</li>');
2518                         }
2519                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $wgLang->formatNum( $pageInfo['authors'] ) ) . '</li>' );
2520                         if( $talkInfo ) {
2521                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $wgLang->formatNum( $talkInfo['authors'] ) ) . '</li>' );
2522                         }
2523                         $wgOut->addHTML( '</ul>' );
2524
2525                 }
2526         }
2527
2528         /**
2529          * Return the total number of edits and number of unique editors
2530          * on a given page. If page does not exist, returns false.
2531          *
2532          * @param Title $title
2533          * @return array
2534          * @access private
2535          */
2536         function pageCountInfo( $title ) {
2537                 $id = $title->getArticleId();
2538                 if( $id == 0 ) {
2539                         return false;
2540                 }
2541
2542                 $dbr =& $this->getDB( DB_SLAVE );
2543
2544                 $rev_clause = array( 'rev_page' => $id );
2545                 $fname = 'Article::pageCountInfo';
2546
2547                 $edits = $dbr->selectField(
2548                         'revision',
2549                         'COUNT(rev_page)',
2550                         $rev_clause,
2551                         $fname,
2552                         $this->getSelectOptions() );
2553
2554                 $authors = $dbr->selectField(
2555                         'revision',
2556                         'COUNT(DISTINCT rev_user_text)',
2557                         $rev_clause,
2558                         $fname,
2559                         $this->getSelectOptions() );
2560
2561                 return array( 'edits' => $edits, 'authors' => $authors );
2562         }
2563
2564         /**
2565          * Return a list of templates used by this article.
2566          * Uses the links table to find the templates
2567          *
2568          * @return array
2569          */
2570         function getUsedTemplates() {
2571                 $result = array();
2572                 $id = $this->mTitle->getArticleID();
2573
2574                 $db =& wfGetDB( DB_SLAVE );
2575                 $res = $db->select( array( 'pagelinks' ),
2576                         array( 'pl_title' ),
2577                         array(
2578                                 'pl_from' => $id,
2579                                 'pl_namespace' => NS_TEMPLATE ),
2580                         'Article:getUsedTemplates' );
2581                 if ( false !== $res ) {
2582                         if ( $db->numRows( $res ) ) {
2583                                 while ( $row = $db->fetchObject( $res ) ) {
2584                                         $result[] = $row->pl_title;
2585                                 }
2586                         }
2587                 }
2588                 $db->freeResult( $res );
2589                 return $result;
2590         }
2591 }
2592
2593 ?>