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