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