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