includes/Article.php

   1 <?php
   2 /**
   3  * File for articles
   4  * @package MediaWiki
   5  */
   6
   7 /**
   8  * Need the CacheManager to be loaded
   9  */
  10 require_once( 'CacheManager.php' );
  11 require_once( 'Revision.php' );
  12
  13 $wgArticleCurContentFields = false;
  14 $wgArticleOldContentFields = false;
  15
  16 /**
  17  * Class representing a MediaWiki article and history.
  18  *
  19  * See design.txt for an overview.
  20  * Note: edit user interface and cache support functions have been
  21  * moved to separate EditPage and CacheManager classes.
  22  *
  23  * @package MediaWiki
  24  */
  25 class Article {
  26         /**#@+
  27          * @access private
  28          */
  29         var $mContent, $mContentLoaded;
  30         var $mUser, $mTimestamp, $mUserText;
  31         var $mCounter, $mComment, $mGoodAdjustment, $mTotalAdjustment;
  32         var $mMinorEdit, $mRedirectedFrom;
  33         var $mTouched, $mFileCache, $mTitle;
  34         var $mId, $mTable;
  35         var $mForUpdate;
  36         var $mOldId;
  37         var $mRevIdFetched;
  38         var $mRevision;
  39         /**#@-*/
  40
  41         /**
  42          * Constructor and clear the article
  43          * @param mixed &$title
  44          */
  45         function Article( &$title ) {
  46                 $this->mTitle =& $title;
  47                 $this->clear();
  48         }
  49
  50         /**
  51          * get the title object of the article
  52          * @public
  53          */
  54         function getTitle() {
  55                 return $this->mTitle;
  56         }
  57
  58         /**
  59           * Clear the object
  60           * @private
  61           */
  62         function clear() {
  63                 $this->mDataLoaded    = false;
  64                 $this->mContentLoaded = false;
  65
  66                 $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
  67                 $this->mRedirectedFrom = $this->mUserText =
  68                 $this->mTimestamp = $this->mComment = $this->mFileCache = '';
  69                 $this->mGoodAdjustment = $this->mTotalAdjustment = 0;
  70                 $this->mTouched = '19700101000000';
  71                 $this->mForUpdate = false;
  72                 $this->mIsRedirect = false;
  73                 $this->mRevIdFetched = 0;
  74         }
  75
  76         /**
  77          * Note that getContent/loadContent may follow redirects if
  78          * not told otherwise, and so may cause a change to mTitle.
  79          *
  80          * @param $noredir
  81          * @return Return the text of this revision
  82         */
  83         function getContent( $noredir ) {
  84                 global $wgRequest, $wgUser, $wgOut;
  85
  86                 # Get variables from query string :P
  87                 $action = $wgRequest->getText( 'action', 'view' );
  88                 $section = $wgRequest->getText( 'section' );
  89                 $preload = $wgRequest->getText( 'preload' );
  90
  91                 $fname =  'Article::getContent';
  92                 wfProfileIn( $fname );
  93
  94                 if ( 0 == $this->getID() ) {
  95                         if ( 'edit' == $action ) {
  96                                 wfProfileOut( $fname );
  97
  98                                 # If requested, preload some text.
  99                                 $text=$this->getPreloadedText($preload);
 100
 101                                 # We used to put MediaWiki:Newarticletext here if
 102                                 # $text was empty at this point.
 103                                 # This is now shown above the edit box instead.
 104                                 return $text;
 105                         }
 106                         wfProfileOut( $fname );
 107                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
 108
 109                         $ret = wfMsg( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon' );
 110                         return "<div class='noarticletext'>$ret</div>";
 111                 } else {
 112                         $this->loadContent( $noredir );
 113                         # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 114                         if ( $this->mTitle->getNamespace() == NS_USER_TALK &&
 115                           $wgUser->isIP($this->mTitle->getText()) &&
 116                           $action=='view'
 117                         ) {
 118                                 wfProfileOut( $fname );
 119                                 return $this->mContent . "\n" .wfMsg('anontalkpagetext');
 120                         } else {
 121                                 if($action=='edit') {
 122                                         if($section!='') {
 123                                                 if($section=='new') {
 124                                                         wfProfileOut( $fname );
 125                                                         $text=$this->getPreloadedText($preload);
 126                                                         return $text;
 127                                                 }
 128
 129                                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 130                                                 # comments to be stripped as well)
 131                                                 $rv=$this->getSection($this->mContent,$section);
 132                                                 wfProfileOut( $fname );
 133                                                 return $rv;
 134                                         }
 135                                 }
 136                                 wfProfileOut( $fname );
 137                                 return $this->mContent;
 138                         }
 139                 }
 140         }
 141
 142         /**
 143                 This function accepts a title string as parameter
 144                 ($preload). If this string is non-empty, it attempts
 145                 to fetch the current revision text.
 146         */
 147         function getPreloadedText($preload) {
 148                 if($preload) {
 149                         $preloadTitle=Title::newFromText($preload);
 150                         if(isset($preloadTitle) && $preloadTitle->userCanRead()) {
 151                         $rev=Revision::newFromTitle($preloadTitle);
 152                         if($rev) {
 153                                 return $rev->getText();
 154                                 }
 155                         }
 156                 }
 157                 return '';
 158         }
 159
 160         /**
 161          * This function returns the text of a section, specified by a number ($section).
 162          * A section is text under a heading like == Heading == or <h1>Heading</h1>, or
 163          * the first section before any such heading (section 0).
 164          *
 165          * If a section contains subsections, these are also returned.
 166          *
 167          * @param string $text text to look in
 168          * @param integer $section section number
 169          * @return string text of the requested section
 170          */
 171         function getSection($text,$section) {
 172
 173                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 174                 # comments to be stripped as well)
 175                 $striparray=array();
 176                 $parser=new Parser();
 177                 $parser->mOutputType=OT_WIKI;
 178                 $parser->mOptions = new ParserOptions();
 179                 $striptext=$parser->strip($text, $striparray, true);
 180
 181                 # now that we can be sure that no pseudo-sections are in the source,
 182                 # split it up by section
 183                 $secs =
 184                   preg_split(
 185                   '/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 186                   $striptext, -1,
 187                   PREG_SPLIT_DELIM_CAPTURE);
 188                 if($section==0) {
 189                         $rv=$secs[0];
 190                 } else {
 191                         $headline=$secs[$section*2-1];
 192                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 193                         $hlevel=$matches[1];
 194
 195                         # translate wiki heading into level
 196                         if(strpos($hlevel,'=')!==false) {
 197                                 $hlevel=strlen($hlevel);
 198                         }
 199
 200                         $rv=$headline. $secs[$section*2];
 201                         $count=$section+1;
 202
 203                         $break=false;
 204                         while(!empty($secs[$count*2-1]) && !$break) {
 205
 206                                 $subheadline=$secs[$count*2-1];
 207                                 preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 208                                 $subhlevel=$matches[1];
 209                                 if(strpos($subhlevel,'=')!==false) {
 210                                         $subhlevel=strlen($subhlevel);
 211                                 }
 212                                 if($subhlevel > $hlevel) {
 213                                         $rv.=$subheadline.$secs[$count*2];
 214                                 }
 215                                 if($subhlevel <= $hlevel) {
 216                                         $break=true;
 217                                 }
 218                                 $count++;
 219
 220                         }
 221                 }
 222                 # reinsert stripped tags
 223                 $rv=$parser->unstrip($rv,$striparray);
 224                 $rv=$parser->unstripNoWiki($rv,$striparray);
 225                 $rv=trim($rv);
 226                 return $rv;
 227
 228         }
 229
 230         /**
 231          * Return an array of the columns of the "cur"-table
 232          */
 233         function getContentFields() {
 234                 return $wgArticleContentFields = array(
 235                   'old_text','old_flags',
 236                   'rev_timestamp','rev_user', 'rev_user_text', 'rev_comment','page_counter',
 237                   'page_namespace', 'page_title', 'page_restrictions','page_touched','page_is_redirect' );
 238         }
 239
 240         /**
 241          * Return the oldid of the article that is to be shown.
 242          * For requests with a "direction", this is not the oldid of the
 243          * query
 244          */
 245         function getOldID() {
 246                 global $wgRequest, $wgOut;
 247                 static $lastid;
 248
 249                 if ( isset( $lastid ) ) {
 250                         return $lastid;
 251                 }
 252                 # Query variables :P
 253                 $oldid = $wgRequest->getVal( 'oldid' );
 254                 if ( isset( $oldid ) ) {
 255                         $oldid = intval( $oldid );
 256                         if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 257                                 $nextid = $this->mTitle->getNextRevisionID( $oldid );
 258                                 if ( $nextid  ) {
 259                                         $oldid = $nextid;
 260                                 } else {
 261                                         $wgOut->redirect( $this->mTitle->getFullURL( 'redirect=no' ) );
 262                                 }
 263                         } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 264                                 $previd = $this->mTitle->getPreviousRevisionID( $oldid );
 265                                 if ( $previd ) {
 266                                         $oldid = $previd;
 267                                 } else {
 268                                         # TODO
 269                                 }
 270                         }
 271                         $lastid = $oldid;
 272                 }
 273                 return @$oldid; # "@" to be able to return "unset" without PHP complaining
 274         }
 275
 276
 277         /**
 278          * Load the revision (including cur_text) into this object
 279          */
 280         function loadContent( $noredir = false ) {
 281                 global $wgOut, $wgRequest;
 282
 283                 if ( $this->mContentLoaded ) return;
 284
 285                 # Query variables :P
 286                 $oldid = $this->getOldID();
 287                 $redirect = $wgRequest->getVal( 'redirect' );
 288
 289                 $fname = 'Article::loadContent';
 290
 291                 # Pre-fill content with error message so that if something
 292                 # fails we'll have something telling us what we intended.
 293
 294                 $t = $this->mTitle->getPrefixedText();
 295
 296                 $noredir = $noredir || ($wgRequest->getVal( 'redirect' ) == 'no')
 297                         || $wgRequest->getCheck( 'rdfrom' );
 298                 $this->mOldId = $oldid;
 299                 $this->fetchContent( $oldid, $noredir, true );
 300         }
 301
 302
 303         /**
 304          * Fetch a page record with the given conditions
 305          * @param Database $dbr
 306          * @param array    $conditions
 307          * @access private
 308          */
 309         function pageData( &$dbr, $conditions ) {
 310                 return $dbr->selectRow( 'page',
 311                         array(
 312                                 'page_id',
 313                                 'page_namespace',
 314                                 'page_title',
 315                                 'page_restrictions',
 316                                 'page_counter',
 317                                 'page_is_redirect',
 318                                 'page_is_new',
 319                                 'page_random',
 320                                 'page_touched',
 321                                 'page_latest',
 322                                 'page_len' ),
 323                         $conditions,
 324                         'Article::pageData' );
 325         }
 326
 327         function pageDataFromTitle( &$dbr, $title ) {
 328                 return $this->pageData( $dbr, array(
 329                         'page_namespace' => $title->getNamespace(),
 330                         'page_title'     => $title->getDBkey() ) );
 331         }
 332
 333         function pageDataFromId( &$dbr, $id ) {
 334                 return $this->pageData( $dbr, array(
 335                         'page_id' => intval( $id ) ) );
 336         }
 337
 338         /**
 339          * Set the general counter, title etc data loaded from
 340          * some source.
 341          *
 342          * @param object $data
 343          * @access private
 344          */
 345         function loadPageData( $data ) {
 346                 $this->mTitle->loadRestrictions( $data->page_restrictions );
 347                 $this->mTitle->mRestrictionsLoaded = true;
 348
 349                 $this->mCounter    = $data->page_counter;
 350                 $this->mTouched    = wfTimestamp( TS_MW, $data->page_touched );
 351                 $this->mIsRedirect = $data->page_is_redirect;
 352                 $this->mLatest     = $data->page_latest;
 353
 354                 $this->mDataLoaded = true;
 355         }
 356
 357         /**
 358          * Get text of an article from database
 359          * @param int $oldid 0 for whatever the latest revision is
 360          * @param bool $noredir Set to false to follow redirects
 361          * @param bool $globalTitle Set to true to change the global $wgTitle object when following redirects or other unexpected title changes
 362          * @return string
 363          */
 364         function fetchContent( $oldid = 0, $noredir = true, $globalTitle = false ) {
 365                 if ( $this->mContentLoaded ) {
 366                         return $this->mContent;
 367                 }
 368                 $dbr =& $this->getDB();
 369                 $fname = 'Article::fetchContent';
 370
 371                 # Pre-fill content with error message so that if something
 372                 # fails we'll have something telling us what we intended.
 373                 $t = $this->mTitle->getPrefixedText();
 374                 if( $oldid ) {
 375                         $t .= ',oldid='.$oldid;
 376                 }
 377                 if( isset( $redirect ) ) {
 378                         $redirect = ($redirect == 'no') ? 'no' : 'yes';
 379                         $t .= ',redirect='.$redirect;
 380                 }
 381                 $this->mContent = wfMsg( 'missingarticle', $t );
 382
 383                 if( $oldid ) {
 384                         $revision = Revision::newFromId( $oldid );
 385                         if( is_null( $revision ) ) {
 386                                 wfDebug( "$fname failed to retrieve specified revision, id $oldid\n" );
 387                                 return false;
 388                         }
 389                         $data = $this->pageDataFromId( $dbr, $revision->getPage() );
 390                         if( !$data ) {
 391                                 wfDebug( "$fname failed to get page data linked to revision id $oldid\n" );
 392                                 return false;
 393                         }
 394                         $this->mTitle = Title::makeTitle( $data->page_namespace, $data->page_title );
 395                         $this->loadPageData( $data );
 396                 } else {
 397                         if( !$this->mDataLoaded ) {
 398                                 $data = $this->pageDataFromTitle( $dbr, $this->mTitle );
 399                                 if( !$data ) {
 400                                         wfDebug( "$fname failed to find page data for title " . $this->mTitle->getPrefixedText() . "\n" );
 401                                         return false;
 402                                 }
 403                                 $this->loadPageData( $data );
 404                         }
 405                         $revision = Revision::newFromId( $this->mLatest );
 406                         if( is_null( $revision ) ) {
 407                                 wfDebug( "$fname failed to retrieve current page, rev_id $data->page_latest\n" );
 408                                 return false;
 409                         }
 410                 }
 411
 412                 # If we got a redirect, follow it (unless we've been told
 413                 # not to by either the function parameter or the query
 414                 if ( !$oldid && !$noredir ) {
 415                         $rt = Title::newFromRedirect( $revision->getText() );
 416                         # process if title object is valid and not special:userlogout
 417                         if ( $rt && ! ( $rt->getNamespace() == NS_SPECIAL && $rt->getText() == 'Userlogout' ) ) {
 418                                 # Gotta hand redirects to special pages differently:
 419                                 # Fill the HTTP response "Location" header and ignore
 420                                 # the rest of the page we're on.
 421                                 global $wgDisableHardRedirects;
 422                                 if( $globalTitle && !$wgDisableHardRedirects ) {
 423                                         global $wgOut;
 424                                         if ( $rt->getInterwiki() != '' && $rt->isLocal() ) {
 425                                                 $source = $this->mTitle->getFullURL( 'redirect=no' );
 426                                                 $wgOut->redirect( $rt->getFullURL( 'rdfrom=' . urlencode( $source ) ) ) ;
 427                                                 return false;
 428                                         }
 429                                         if ( $rt->getNamespace() == NS_SPECIAL ) {
 430                                                 $wgOut->redirect( $rt->getFullURL() );
 431                                                 return false;
 432                                         }
 433                                 }
 434                                 $redirData = $this->pageDataFromTitle( $dbr, $rt );
 435                                 if( $redirData ) {
 436                                         $redirRev = Revision::newFromId( $redirData->page_latest );
 437                                         if( !is_null( $redirRev ) ) {
 438                                                 $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 439                                                 $this->mTitle = $rt;
 440                                                 $data = $redirData;
 441                                                 $this->loadPageData( $data );
 442                                                 $revision = $redirRev;
 443                                         }
 444                                 }
 445                         }
 446                 }
 447
 448                 # if the title's different from expected, update...
 449                 if( $globalTitle ) {
 450                         global $wgTitle;
 451                         if( !$this->mTitle->equals( $wgTitle ) ) {
 452                                 $wgTitle = $this->mTitle;
 453                         }
 454                 }
 455
 456                 # Back to the business at hand...
 457                 $this->mContent   = $revision->getText();
 458
 459                 $this->mUser      = $revision->getUser();
 460                 $this->mUserText  = $revision->getUserText();
 461                 $this->mComment   = $revision->getComment();
 462                 $this->mTimestamp = wfTimestamp( TS_MW, $revision->getTimestamp() );
 463
 464                 $this->mRevIdFetched = $revision->getID();
 465                 $this->mContentLoaded = true;
 466                 $this->mRevision =& $revision;
 467
 468                 return $this->mContent;
 469         }
 470
 471         /**
 472          * Gets the article text without using so many damn globals
 473          * Returns false on error
 474          *
 475          * @param integer $oldid
 476          */
 477         function getContentWithoutUsingSoManyDamnGlobals( $oldid = 0, $noredir = false ) {
 478                 return $this->fetchContent( $oldid, $noredir, false );
 479         }
 480
 481         /**
 482          * Read/write accessor to select FOR UPDATE
 483          */
 484         function forUpdate( $x = NULL ) {
 485                 return wfSetVar( $this->mForUpdate, $x );
 486         }
 487
 488         /**
 489          * Get the database which should be used for reads
 490          */
 491         function &getDB() {
 492                 $ret =& wfGetDB( DB_MASTER );
 493                 return $ret;
 494                 #if ( $this->mForUpdate ) {
 495                         $ret =& wfGetDB( DB_MASTER );
 496                 #} else {
 497                 #       $ret =& wfGetDB( DB_SLAVE );
 498                 #}
 499                 return $ret;
 500         }
 501
 502         /**
 503          * Get options for all SELECT statements
 504          * Can pass an option array, to which the class-wide options will be appended
 505          */
 506         function getSelectOptions( $options = '' ) {
 507                 if ( $this->mForUpdate ) {
 508                         if ( is_array( $options ) ) {
 509                                 $options[] = 'FOR UPDATE';
 510                         } else {
 511                                 $options = 'FOR UPDATE';
 512                         }
 513                 }
 514                 return $options;
 515         }
 516
 517         /**
 518          * Return the Article ID
 519          */
 520         function getID() {
 521                 if( $this->mTitle ) {
 522                         return $this->mTitle->getArticleID();
 523                 } else {
 524                         return 0;
 525                 }
 526         }
 527
 528         /**
 529          * Returns true if this article exists in the database.
 530          * @return bool
 531          */
 532         function exists() {
 533                 return $this->getId() != 0;
 534         }
 535
 536         /**
 537          * Get the view count for this article
 538          */
 539         function getCount() {
 540                 if ( -1 == $this->mCounter ) {
 541                         $id = $this->getID();
 542                         $dbr =& $this->getDB();
 543                         $this->mCounter = $dbr->selectField( 'page', 'page_counter', array( 'page_id' => $id ),
 544                                 'Article::getCount', $this->getSelectOptions() );
 545                 }
 546                 return $this->mCounter;
 547         }
 548
 549         /**
 550          * Would the given text make this article a "good" article (i.e.,
 551          * suitable for including in the article count)?
 552          * @param string $text Text to analyze
 553          * @return integer 1 if it can be counted else 0
 554          */
 555         function isCountable( $text ) {
 556                 global $wgUseCommaCount;
 557
 558                 if ( NS_MAIN != $this->mTitle->getNamespace() ) { return 0; }
 559                 if ( $this->isRedirect( $text ) ) { return 0; }
 560                 $token = ($wgUseCommaCount ? ',' : '[[' );
 561                 if ( false === strstr( $text, $token ) ) { return 0; }
 562                 return 1;
 563         }
 564
 565         /**
 566          * Tests if the article text represents a redirect
 567          */
 568         function isRedirect( $text = false ) {
 569                 if ( $text === false ) {
 570                         $this->loadContent();
 571                         $titleObj = Title::newFromRedirect( $this->fetchContent() );
 572                 } else {
 573                         $titleObj = Title::newFromRedirect( $text );
 574                 }
 575                 return $titleObj !== NULL;
 576         }
 577
 578         /**
 579          * Returns true if the currently-referenced revision is the current edit
 580          * to this page (and it exists).
 581          * @return bool
 582          */
 583         function isCurrent() {
 584                 return $this->exists() &&
 585                         isset( $this->mRevision ) &&
 586                         $this->mRevision->isCurrent();
 587         }
 588
 589         /**
 590          * Loads everything except the text
 591          * This isn't necessary for all uses, so it's only done if needed.
 592          * @private
 593          */
 594         function loadLastEdit() {
 595                 global $wgOut;
 596
 597                 if ( -1 != $this->mUser )
 598                         return;
 599
 600                 # New or non-existent articles have no user information
 601                 $id = $this->getID();
 602                 if ( 0 == $id ) return;
 603
 604                 $this->mLastRevision = Revision::loadFromPageId( $this->getDB(), $id );
 605                 if( !is_null( $this->mLastRevision ) ) {
 606                         $this->mUser      = $this->mLastRevision->getUser();
 607                         $this->mUserText  = $this->mLastRevision->getUserText();
 608                         $this->mTimestamp = $this->mLastRevision->getTimestamp();
 609                         $this->mComment   = $this->mLastRevision->getComment();
 610                         $this->mMinorEdit = $this->mLastRevision->isMinor();
 611                 }
 612         }
 613
 614         function getTimestamp() {
 615                 $this->loadLastEdit();
 616                 return wfTimestamp(TS_MW, $this->mTimestamp);
 617         }
 618
 619         function getUser() {
 620                 $this->loadLastEdit();
 621                 return $this->mUser;
 622         }
 623
 624         function getUserText() {
 625                 $this->loadLastEdit();
 626                 return $this->mUserText;
 627         }
 628
 629         function getComment() {
 630                 $this->loadLastEdit();
 631                 return $this->mComment;
 632         }
 633
 634         function getMinorEdit() {
 635                 $this->loadLastEdit();
 636                 return $this->mMinorEdit;
 637         }
 638
 639         function getRevIdFetched() {
 640                 $this->loadLastEdit();
 641                 return $this->mRevIdFetched;
 642         }
 643
 644         function getContributors($limit = 0, $offset = 0) {
 645                 $fname = 'Article::getContributors';
 646
 647                 # XXX: this is expensive; cache this info somewhere.
 648
 649                 $title = $this->mTitle;
 650                 $contribs = array();
 651                 $dbr =& $this->getDB();
 652                 $revTable = $dbr->tableName( 'revision' );
 653                 $userTable = $dbr->tableName( 'user' );
 654                 $encDBkey = $dbr->addQuotes( $title->getDBkey() );
 655                 $ns = $title->getNamespace();
 656                 $user = $this->getUser();
 657                 $pageId = $this->getId();
 658
 659                 $sql = "SELECT rev_user, rev_user_text, user_real_name, MAX(rev_timestamp) as timestamp
 660                         FROM $revTable LEFT JOIN $userTable ON rev_user = user_id
 661                         WHERE rev_page = $pageId
 662                         AND rev_user != $user
 663                         GROUP BY rev_user, rev_user_text, user_real_name
 664                         ORDER BY timestamp DESC";
 665
 666                 if ($limit > 0) { $sql .= ' LIMIT '.$limit; }
 667                 $sql .= ' '. $this->getSelectOptions();
 668
 669                 $res = $dbr->query($sql, $fname);
 670
 671                 while ( $line = $dbr->fetchObject( $res ) ) {
 672                         $contribs[] = array($line->rev_user, $line->rev_user_text, $line->user_real_name);
 673                 }
 674
 675                 $dbr->freeResult($res);
 676                 return $contribs;
 677         }
 678
 679         /**
 680          * This is the default action of the script: just view the page of
 681          * the given title.
 682         */
 683         function view() {
 684                 global $wgUser, $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgLang;
 685                 global $wgLinkCache, $IP, $wgEnableParserCache, $wgStylePath, $wgUseRCPatrol;
 686                 global $wgEnotif, $wgParser, $wgParserCache, $wgUseTrackbacks;
 687                 $sk = $wgUser->getSkin();
 688
 689                 $fname = 'Article::view';
 690                 wfProfileIn( $fname );
 691                 # Get variables from query string
 692                 $oldid = $this->getOldID();
 693                 $diff = $wgRequest->getVal( 'diff' );
 694                 $rcid = $wgRequest->getVal( 'rcid' );
 695                 $rdfrom = $wgRequest->getVal( 'rdfrom' );
 696
 697                 $wgOut->setArticleFlag( true );
 698                 $wgOut->setRobotpolicy( 'index,follow' );
 699                 # If we got diff and oldid in the query, we want to see a
 700                 # diff page instead of the article.
 701
 702                 if ( !is_null( $diff ) ) {
 703                         require_once( 'DifferenceEngine.php' );
 704                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 705
 706                         $de = new DifferenceEngine( $oldid, $diff, $rcid );
 707                         // DifferenceEngine directly fetched the revision:
 708                         $this->mRevIdFetched = $de->mNewid;
 709                         $de->showDiffPage();
 710
 711                         if( $diff == 0 ) {
 712                                 # Run view updates for current revision only
 713                                 $this->viewUpdates();
 714                         }
 715                         wfProfileOut( $fname );
 716                         return;
 717                 }
 718
 719                 if ( empty( $oldid ) && $this->checkTouched() ) {
 720                         $wgOut->setETag($wgParserCache->getETag($this, $wgUser));
 721
 722                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 723                                 wfProfileOut( $fname );
 724                                 return;
 725                         } else if ( $this->tryFileCache() ) {
 726                                 # tell wgOut that output is taken care of
 727                                 $wgOut->disable();
 728                                 $this->viewUpdates();
 729                                 wfProfileOut( $fname );
 730                                 return;
 731                         }
 732                 }
 733                 # Should the parser cache be used?
 734                 $pcache = $wgEnableParserCache &&
 735                         intval( $wgUser->getOption( 'stubthreshold' ) ) == 0 &&
 736                         $this->exists() &&
 737                         empty( $oldid );
 738                 wfDebug( 'Article::view using parser cache: ' . ($pcache ? 'yes' : 'no' ) . "\n" );
 739
 740                 $outputDone = false;
 741                 if ( $pcache ) {
 742                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 743                                 $outputDone = true;
 744                         }
 745                 }
 746                 if ( !$outputDone ) {
 747                         $text = $this->getContent( false ); # May change mTitle by following a redirect
 748
 749                         # Another whitelist check in case oldid or redirects are altering the title
 750                         if ( !$this->mTitle->userCanRead() ) {
 751                                 $wgOut->loginToUse();
 752                                 $wgOut->output();
 753                                 exit;
 754                         }
 755
 756                         # We're looking at an old revision
 757
 758                         if ( !empty( $oldid ) ) {
 759                                 $this->setOldSubtitle( isset($this->mOldId) ? $this->mOldId : $oldid );
 760                                 $wgOut->setRobotpolicy( 'noindex,follow' );
 761                         }
 762                         if ( '' != $this->mRedirectedFrom ) {
 763                                 if ( wfRunHooks( 'ArticleViewRedirect', array( &$this ) ) ) {
 764                                         $sk = $wgUser->getSkin();
 765                                         $redir = $sk->makeKnownLink( $this->mRedirectedFrom, '', 'redirect=no' );
 766                                         $s = wfMsg( 'redirectedfrom', $redir );
 767                                         $wgOut->setSubtitle( $s );
 768                                         # Can't cache redirects
 769                                         $pcache = false;
 770                                 }
 771                         } elseif ( !empty( $rdfrom ) ) {
 772                                 global $wgRedirectSources;
 773                                 if( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 774                                         $sk = $wgUser->getSkin();
 775                                         $redir = $sk->makeExternalLink( $rdfrom, $rdfrom );
 776                                         $s = wfMsg( 'redirectedfrom', $redir );
 777                                         $wgOut->setSubtitle( $s );
 778                                 }
 779                         }
 780
 781                         # wrap user css and user js in pre and don't parse
 782                         # XXX: use $this->mTitle->usCssJsSubpage() when php is fixed/ a workaround is found
 783                         if (
 784                                 $this->mTitle->getNamespace() == NS_USER &&
 785                                 preg_match('/\\/[\\w]+\\.(css|js)$/', $this->mTitle->getDBkey())
 786                         ) {
 787                                 $wgOut->addWikiText( wfMsg('clearyourcache'));
 788                                 $wgOut->addHTML( '<pre>'.htmlspecialchars($this->mContent)."\n</pre>" );
 789                         } else if ( $rt = Title::newFromRedirect( $text ) ) {
 790                                 # Display redirect
 791                                 $imageUrl = $wgStylePath.'/common/images/redirect.png';
 792                                 $targetUrl = $rt->escapeLocalURL();
 793                                 $titleText = htmlspecialchars( $rt->getPrefixedText() );
 794                                 $link = $sk->makeLinkObj( $rt );
 795
 796                                 $wgOut->addHTML( '<img valign="center" src="'.$imageUrl.'" alt="#REDIRECT" />' .
 797                                   '<span class="redirectText">'.$link.'</span>' );
 798
 799                                 $parseout = $wgParser->parse($text, $this->mTitle, ParserOptions::newFromUser($wgUser));
 800                                 $catlinks = $parseout->getCategoryLinks();
 801                                 $wgOut->addCategoryLinks($catlinks);
 802                                 $skin = $wgUser->getSkin();
 803                         } else if ( $pcache ) {
 804                                 # Display content and save to parser cache
 805                                 $wgOut->addPrimaryWikiText( $text, $this );
 806                         } else {
 807                                 # Display content, don't attempt to save to parser cache
 808
 809                                 # Don't show section-edit links on old revisions... this way lies madness.
 810                                 if( !$this->isCurrent() ) {
 811                                         $oldEditSectionSetting = $wgOut->mParserOptions->setEditSection( false );
 812                                 }
 813                                 $wgOut->addWikiText( $text );
 814
 815                                 if( !$this->isCurrent() ) {
 816                                         $wgOut->mParserOptions->setEditSection( $oldEditSectionSetting );
 817                                 }
 818                         }
 819                 }
 820                 /* title may have been set from the cache */
 821                 $t = $wgOut->getPageTitle();
 822                 if( empty( $t ) ) {
 823                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 824                 }
 825
 826                 # If we have been passed an &rcid= parameter, we want to give the user a
 827                 # chance to mark this new article as patrolled.
 828                 if ( $wgUseRCPatrol
 829                         && !is_null($rcid)
 830                         && $rcid != 0
 831                         && $wgUser->isLoggedIn()
 832                         && ( $wgUser->isAllowed('patrol') || !$wgOnlySysopsCanPatrol ) )
 833                 {
 834                         $wgOut->addHTML(
 835                                 "<div class='patrollink'>" .
 836                                         wfMsg ( 'markaspatrolledlink',
 837                                         $sk->makeKnownLinkObj( $this->mTitle, wfMsg('markaspatrolledtext'), "action=markpatrolled&rcid=$rcid" )
 838                                         ) .
 839                                 '</div>'
 840                          );
 841                 }
 842
 843                 # Trackbacks
 844                 if ($wgUseTrackbacks)
 845                         $this->addTrackbacks();
 846
 847                 # Put link titles into the link cache
 848                 $wgOut->transformBuffer();
 849
 850                 # Add link titles as META keywords
 851                 $wgOut->addMetaTags() ;
 852
 853                 $this->viewUpdates();
 854                 wfProfileOut( $fname );
 855         }
 856
 857         function addTrackbacks() {
 858                 global $wgOut, $wgUser;
 859
 860                 $dbr =& wfGetDB(DB_SLAVE);
 861                 $tbs = $dbr->select(
 862                                 /* FROM   */ 'trackbacks',
 863                                 /* SELECT */ array('tb_id', 'tb_title', 'tb_url', 'tb_ex', 'tb_name'),
 864                                 /* WHERE  */ array('tb_page' => $this->getID())
 865                 );
 866
 867                 if (!$dbr->numrows($tbs))
 868                         return;
 869
 870                 $tbtext = "";
 871                 while ($o = $dbr->fetchObject($tbs)) {
 872                         $rmvtxt = "";
 873                         if ($wgUser->isSysop()) {
 874                                 $delurl = $this->mTitle->getFullURL("action=deletetrackback&tbid="
 875                                                 . $o->tb_id . "&token=" . $wgUser->editToken());
 876                                 $rmvtxt = wfMsg('trackbackremove', $delurl);
 877                         }
 878                         $tbtext .= wfMsg(strlen($o->tb_ex) ? 'trackbackexcerpt' : 'trackback',
 879                                         $o->tb_title,
 880                                         $o->tb_url,
 881                                         $o->tb_ex,
 882                                         $o->tb_name,
 883                                         $rmvtxt);
 884                 }
 885                 $wgOut->addWikitext(wfMsg('trackbackbox', $tbtext));
 886         }
 887
 888         function deletetrackback() {
 889                 global $wgUser, $wgRequest, $wgOut, $wgTitle;
 890
 891                 if (!$wgUser->matchEditToken($wgRequest->getVal('token'))) {
 892                         $wgOut->addWikitext(wfMsg('sessionfailure'));
 893                         return;
 894                 }
 895
 896                 if ((!$wgUser->isAllowed('delete'))) {
 897                         $wgOut->sysopRequired();
 898                         return;
 899                 }
 900
 901                 if (wfReadOnly()) {
 902                         $wgOut->readOnlyPage();
 903                         return;
 904                 }
 905
 906                 $db =& wfGetDB(DB_MASTER);
 907                 $db->delete('trackbacks', array('tb_id' => $wgRequest->getInt('tbid')));
 908                 $wgTitle->invalidateCache();
 909                 $wgOut->addWikiText(wfMsg('trackbackdeleteok'));
 910         }
 911
 912         function render() {
 913                 global $wgOut;
 914
 915                 $wgOut->setArticleBodyOnly(true);
 916                 $this->view();
 917         }
 918
 919         /**
 920          * Insert a new empty page record for this article.
 921          * This *must* be followed up by creating a revision
 922          * and running $this->updateToLatest( $rev_id );
 923          * or else the record will be left in a funky state.
 924          * Best if all done inside a transaction.
 925          *
 926          * @param Database $dbw
 927          * @param string   $restrictions
 928          * @return int     The newly created page_id key
 929          * @access private
 930          */
 931         function insertOn( &$dbw, $restrictions = '' ) {
 932                 $fname = 'Article::insertOn';
 933                 wfProfileIn( $fname );
 934
 935                 $page_id = $dbw->nextSequenceValue( 'page_page_id_seq' );
 936                 $dbw->insert( 'page', array(
 937                         'page_id'           => $page_id,
 938                         'page_namespace'    => $this->mTitle->getNamespace(),
 939                         'page_title'        => $this->mTitle->getDBkey(),
 940                         'page_counter'      => 0,
 941                         'page_restrictions' => $restrictions,
 942                         'page_is_redirect'  => 0, # Will set this shortly...
 943                         'page_is_new'       => 1,
 944                         'page_random'       => wfRandom(),
 945                         'page_touched'      => $dbw->timestamp(),
 946                         'page_latest'       => 0, # Fill this in shortly...
 947                 ), $fname );
 948                 $newid = $dbw->insertId();
 949
 950                 $this->mTitle->resetArticleId( $newid );
 951
 952                 wfProfileOut( $fname );
 953                 return $newid;
 954         }
 955
 956         /**
 957          * Update the page record to point to a newly saved revision.
 958          *
 959          * @param Database $dbw
 960          * @param Revision $revision -- for ID number, and text used to set
 961                                         length and redirect status fields
 962          * @param int $lastRevision -- if given, will not overwrite the page field
 963          *                             when different from the currently set value.
 964          *                             Giving 0 indicates the new page flag should
 965          *                             be set on.
 966          * @return bool true on success, false on failure
 967          * @access private
 968          */
 969         function updateRevisionOn( &$dbw, $revision, $lastRevision = null ) {
 970                 $fname = 'Article::updateToRevision';
 971                 wfProfileIn( $fname );
 972
 973                 $conditions = array( 'page_id' => $this->getId() );
 974                 if( !is_null( $lastRevision ) ) {
 975                         # An extra check against threads stepping on each other
 976                         $conditions['page_latest'] = $lastRevision;
 977                 }
 978
 979                 $text = $revision->getText();
 980                 $dbw->update( 'page',
 981                         array( /* SET */
 982                                 'page_latest'      => $revision->getId(),
 983                                 'page_touched'     => $dbw->timestamp(),
 984                                 'page_is_new'      => ($lastRevision === 0) ? 1 : 0,
 985                                 'page_is_redirect' => Article::isRedirect( $text ) ? 1 : 0,
 986                                 'page_len'         => strlen( $text ),
 987                         ),
 988                         $conditions,
 989                         $fname );
 990
 991                 wfProfileOut( $fname );
 992                 return ( $dbw->affectedRows() != 0 );
 993         }
 994
 995         /**
 996          * If the given revision is newer than the currently set page_latest,
 997          * update the page record. Otherwise, do nothing.
 998          *
 999          * @param Database $dbw
1000          * @param Revision $revision
1001          */
1002         function updateIfNewerOn( &$dbw, $revision ) {
1003                 $fname = 'Article::updateIfNewerOn';
1004                 wfProfileIn( $fname );
1005
1006                 $row = $dbw->selectRow(
1007                         array( 'revision', 'page' ),
1008                         array( 'rev_id', 'rev_timestamp' ),
1009                         array(
1010                                 'page_id' => $this->getId(),
1011                                 'page_latest=rev_id' ),
1012                         $fname );
1013                 if( $row ) {
1014                         if( wfTimestamp(TS_MW, $row->rev_timestamp) >= $revision->getTimestamp() ) {
1015                                 wfProfileOut( $fname );
1016                                 return false;
1017                         }
1018                         $prev = $row->rev_id;
1019                 } else {
1020                         # No or missing previous revision; mark the page as new
1021                         $prev = 0;
1022                 }
1023
1024                 $ret = $this->updateRevisionOn( $dbw, $revision, $prev );
1025                 wfProfileOut( $fname );
1026                 return $ret;
1027         }
1028
1029         /**
1030          * Theoretically we could defer these whole insert and update
1031          * functions for after display, but that's taking a big leap
1032          * of faith, and we want to be able to report database
1033          * errors at some point.
1034          * @private
1035          */
1036         function insertNewArticle( $text, $summary, $isminor, $watchthis, $suppressRC=false, $comment=false ) {
1037                 global $wgOut, $wgUser;
1038                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
1039
1040                 $fname = 'Article::insertNewArticle';
1041                 wfProfileIn( $fname );
1042
1043                 if( !wfRunHooks( 'ArticleSave', array( &$this, &$wgUser, &$text,
1044                         &$summary, &$isminor, &$watchthis, NULL ) ) ) {
1045                         wfDebug( "$fname: ArticleSave hook aborted save!\n" );
1046                         wfProfileOut( $fname );
1047                         return false;
1048                 }
1049
1050                 $this->mGoodAdjustment = $this->isCountable( $text );
1051                 $this->mTotalAdjustment = 1;
1052
1053                 $ns = $this->mTitle->getNamespace();
1054                 $ttl = $this->mTitle->getDBkey();
1055
1056                 # If this is a comment, add the summary as headline
1057                 if($comment && $summary!="") {
1058                         $text="== {$summary} ==\n\n".$text;
1059                 }
1060                 $text = $this->preSaveTransform( $text );
1061                 $isminor = ( $isminor && $wgUser->isLoggedIn() ) ? 1 : 0;
1062                 $now = wfTimestampNow();
1063
1064                 $dbw =& wfGetDB( DB_MASTER );
1065
1066                 # Add the page record; stake our claim on this title!
1067                 $newid = $this->insertOn( $dbw );
1068
1069                 # Save the revision text...
1070                 $revision = new Revision( array(
1071                         'page'       => $newid,
1072                         'comment'    => $summary,
1073                         'minor_edit' => $isminor,
1074                         'text'       => $text
1075                         ) );
1076                 $revisionId = $revision->insertOn( $dbw );
1077
1078                 $this->mTitle->resetArticleID( $newid );
1079
1080                 # Update the page record with revision data
1081                 $this->updateRevisionOn( $dbw, $revision, 0 );
1082
1083                 Article::onArticleCreate( $this->mTitle );
1084                 if(!$suppressRC) {
1085                         RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary, 'default',
1086                           '', strlen( $text ), $revisionId );
1087                 }
1088
1089                 if ($watchthis) {
1090                         if(!$this->mTitle->userIsWatching()) $this->watch();
1091                 } else {
1092                         if ( $this->mTitle->userIsWatching() ) {
1093                                 $this->unwatch();
1094                         }
1095                 }
1096
1097                 # The talk page isn't in the regular link tables, so we need to update manually:
1098                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
1099                 $dbw->update( 'page',
1100                         array( 'page_touched' => $dbw->timestamp($now) ),
1101                         array( 'page_namespace' => $talkns,
1102                                'page_title' => $ttl ),
1103                         $fname );
1104
1105                 # standard deferred updates
1106                 $this->editUpdates( $text, $summary, $isminor, $now );
1107
1108                 $oldid = 0; # new article
1109                 $this->showArticle( $text, wfMsg( 'newarticle' ), false, $isminor, $now, $summary, $oldid );
1110
1111                 wfRunHooks( 'ArticleSaveComplete', array( &$this, &$wgUser, $text,
1112                         $summary, $isminor,
1113                         $watchthis, NULL ) );
1114                 wfProfileOut( $fname );
1115         }
1116
1117         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = '', $edittime = NULL) {
1118                 $this->replaceSection( $section, $text, $summary, $edittime );
1119         }
1120
1121         function replaceSection($section, $text, $summary = '', $edittime = NULL) {
1122                 $fname = 'Article::replaceSection';
1123                 wfProfileIn( $fname );
1124
1125                 if ($section != '') {
1126                         if( is_null( $edittime ) ) {
1127                                 $rev = Revision::newFromTitle( $this->mTitle );
1128                         } else {
1129                                 $dbw =& wfGetDB( DB_MASTER );
1130                                 $rev = Revision::loadFromTimestamp( $dbw, $this->mTitle, $edittime );
1131                         }
1132                         $oldtext = $rev->getText();
1133
1134                         if($section=='new') {
1135                                 if($summary) $subject="== {$summary} ==\n\n";
1136                                 $text=$oldtext."\n\n".$subject.$text;
1137                         } else {
1138
1139                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
1140                                 # comments to be stripped as well)
1141                                 $striparray=array();
1142                                 $parser=new Parser();
1143                                 $parser->mOutputType=OT_WIKI;
1144                                 $parser->mOptions = new ParserOptions();
1145                                 $oldtext=$parser->strip($oldtext, $striparray, true);
1146
1147                                 # now that we can be sure that no pseudo-sections are in the source,
1148                                 # split it up
1149                                 # Unfortunately we can't simply do a preg_replace because that might
1150                                 # replace the wrong section, so we have to use the section counter instead
1151                                 $secs=preg_split('/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
1152                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
1153                                 $secs[$section*2]=$text."\n\n"; // replace with edited
1154
1155                                 # section 0 is top (intro) section
1156                                 if($section!=0) {
1157
1158                                         # headline of old section - we need to go through this section
1159                                         # to determine if there are any subsections that now need to
1160                                         # be erased, as the mother section has been replaced with
1161                                         # the text of all subsections.
1162                                         $headline=$secs[$section*2-1];
1163                                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
1164                                         $hlevel=$matches[1];
1165
1166                                         # determine headline level for wikimarkup headings
1167                                         if(strpos($hlevel,'=')!==false) {
1168                                                 $hlevel=strlen($hlevel);
1169                                         }
1170
1171                                         $secs[$section*2-1]=''; // erase old headline
1172                                         $count=$section+1;
1173                                         $break=false;
1174                                         while(!empty($secs[$count*2-1]) && !$break) {
1175
1176                                                 $subheadline=$secs[$count*2-1];
1177                                                 preg_match(
1178                                                  '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
1179                                                 $subhlevel=$matches[1];
1180                                                 if(strpos($subhlevel,'=')!==false) {
1181                                                         $subhlevel=strlen($subhlevel);
1182                                                 }
1183                                                 if($subhlevel > $hlevel) {
1184                                                         // erase old subsections
1185                                                         $secs[$count*2-1]='';
1186                                                         $secs[$count*2]='';
1187                                                 }
1188                                                 if($subhlevel <= $hlevel) {
1189                                                         $break=true;
1190                                                 }
1191                                                 $count++;
1192
1193                                         }
1194
1195                                 }
1196                                 $text=join('',$secs);
1197                                 # reinsert the stuff that we stripped out earlier
1198                                 $text=$parser->unstrip($text,$striparray);
1199                                 $text=$parser->unstripNoWiki($text,$striparray);
1200                         }
1201
1202                 }
1203                 wfProfileOut( $fname );
1204                 return $text;
1205         }
1206
1207         /**
1208          * Change an existing article. Puts the previous version back into the old table, updates RC
1209          * and all necessary caches, mostly via the deferred update array.
1210          *
1211          * It is possible to call this function from a command-line script, but note that you should
1212          * first set $wgUser, and clean up $wgDeferredUpdates after each edit.
1213          */
1214         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
1215                 global $wgOut, $wgUser;
1216                 global $wgDBtransactions, $wgMwRedir;
1217                 global $wgUseSquid, $wgInternalServer, $wgPostCommitUpdateList, $wgUseFileCache;
1218
1219                 $fname = 'Article::updateArticle';
1220                 wfProfileIn( $fname );
1221                 $good = true;
1222
1223                 if( !wfRunHooks( 'ArticleSave', array( &$this, &$wgUser, &$text,
1224                         &$summary, &$minor,
1225                         &$watchthis, &$sectionanchor ) ) ) {
1226                         wfDebug( "$fname: ArticleSave hook aborted save!\n" );
1227                         wfProfileOut( $fname );
1228                         return false;
1229                 }
1230
1231                 $isminor = ( $minor && $wgUser->isLoggedIn() );
1232                 if ( $this->isRedirect( $text ) ) {
1233                         # Remove all content but redirect
1234                         # This could be done by reconstructing the redirect from a title given by
1235                         # Title::newFromRedirect(), but then we wouldn't know which synonym the user
1236                         # wants to see
1237                         if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ')[^\\n]+)/i', $text, $m ) ) {
1238                                 $redir = 1;
1239                                 $text = $m[1] . "\n";
1240                         }
1241                 }
1242                 else { $redir = 0; }
1243
1244                 $text = $this->preSaveTransform( $text );
1245                 $dbw =& wfGetDB( DB_MASTER );
1246                 $now = wfTimestampNow();
1247
1248                 # Update article, but only if changed.
1249
1250                 # It's important that we either rollback or complete, otherwise an attacker could
1251                 # overwrite cur entries by sending precisely timed user aborts. Random bored users
1252                 # could conceivably have the same effect, especially if cur is locked for long periods.
1253                 if( !$wgDBtransactions ) {
1254                         $userAbort = ignore_user_abort( true );
1255                 }
1256
1257                 $oldtext = $this->getContent( true );
1258                 $oldsize = strlen( $oldtext );
1259                 $newsize = strlen( $text );
1260                 $lastRevision = 0;
1261
1262                 if ( 0 != strcmp( $text, $oldtext ) ) {
1263                         $this->mGoodAdjustment = $this->isCountable( $text )
1264                           - $this->isCountable( $oldtext );
1265                         $this->mTotalAdjustment = 0;
1266                         $now = wfTimestampNow();
1267
1268                         $lastRevision = $dbw->selectField(
1269                                 'page', 'page_latest', array( 'page_id' => $this->getId() ) );
1270
1271                         $revision = new Revision( array(
1272                                 'page'       => $this->getId(),
1273                                 'comment'    => $summary,
1274                                 'minor_edit' => $isminor,
1275                                 'text'       => $text
1276                                 ) );
1277
1278                         $dbw->immediateCommit();
1279                         $dbw->begin();
1280                         $revisionId = $revision->insertOn( $dbw );
1281
1282                         # Update page
1283                         $ok = $this->updateRevisionOn( $dbw, $revision, $lastRevision );
1284
1285                         if( !$ok ) {
1286                                 /* Belated edit conflict! Run away!! */
1287                                 $good = false;
1288                                 $dbw->rollback();
1289                         } else {
1290                                 # Update recentchanges and purge cache and whatnot
1291                                 $bot = (int)($wgUser->isBot() || $forceBot);
1292                                 RecentChange::notifyEdit( $now, $this->mTitle, $isminor, $wgUser, $summary,
1293                                         $lastRevision, $this->getTimestamp(), $bot, '', $oldsize, $newsize,
1294                                         $revisionId );
1295                                 Article::onArticleEdit( $this->mTitle );
1296                                 $dbw->commit();
1297                         }
1298                 }
1299
1300                 if( !$wgDBtransactions ) {
1301                         ignore_user_abort( $userAbort );
1302                 }
1303
1304                 if ( $good ) {
1305                         if ($watchthis) {
1306                                 if (!$this->mTitle->userIsWatching()) {
1307                                         $dbw->immediateCommit();
1308                                         $dbw->begin();
1309                                         $this->watch();
1310                                         $dbw->commit();
1311                                 }
1312                         } else {
1313                                 if ( $this->mTitle->userIsWatching() ) {
1314                                         $dbw->immediateCommit();
1315                                         $dbw->begin();
1316                                         $this->unwatch();
1317                                         $dbw->commit();
1318                                 }
1319                         }
1320                         # standard deferred updates
1321                         $this->editUpdates( $text, $summary, $minor, $now );
1322
1323
1324                         $urls = array();
1325                         # Template namespace
1326                         # Purge all articles linking here
1327                         if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
1328                                 $titles = $this->mTitle->getLinksTo();
1329                                 Title::touchArray( $titles );
1330                                 if ( $wgUseSquid ) {
1331                                                 foreach ( $titles as $title ) {
1332                                                         $urls[] = $title->getInternalURL();
1333                                                 }
1334                                 }
1335                         }
1336
1337                         # Squid updates
1338                         if ( $wgUseSquid ) {
1339                                 $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
1340                                 $u = new SquidUpdate( $urls );
1341                                 array_push( $wgPostCommitUpdateList, $u );
1342                         }
1343
1344                         # File cache
1345                         if ( $wgUseFileCache ) {
1346                                 $cm = new CacheManager($this->mTitle);
1347                                 @unlink($cm->fileCacheName());
1348                         }
1349
1350                         $this->showArticle( $text, wfMsg( 'updated' ), $sectionanchor, $isminor, $now, $summary, $lastRevision );
1351                 }
1352                 wfRunHooks( 'ArticleSaveComplete',
1353                         array( &$this, &$wgUser, $text,
1354                         $summary, $minor,
1355                         $watchthis, $sectionanchor ) );
1356                 wfProfileOut( $fname );
1357                 return $good;
1358         }
1359
1360         /**
1361          * After we've either updated or inserted the article, update
1362          * the link tables and redirect to the new page.
1363          */
1364         function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid ) {
1365                 global $wgUseDumbLinkUpdate, $wgAntiLockFlags, $wgOut, $wgUser, $wgLinkCache, $wgEnotif;
1366                 global $wgUseEnotif;
1367
1368                 $fname = 'Article::showArticle';
1369                 wfProfileIn( $fname );
1370
1371                 $wgLinkCache = new LinkCache();
1372
1373                 if ( !$wgUseDumbLinkUpdate ) {
1374                         # Preload links to reduce lock time
1375                         if ( $wgAntiLockFlags & ALF_PRELOAD_LINKS ) {
1376                                 $wgLinkCache->preFill( $this->mTitle );
1377                                 $wgLinkCache->clear();
1378                         }
1379                 }
1380
1381                 # Parse the text and replace links with placeholders
1382                 $wgOut = new OutputPage();
1383
1384                 # Pass the current title along in case we're creating a wiki page
1385                 # which is different than the currently displayed one (e.g. image
1386                 # pages created on file uploads); otherwise, link updates will
1387                 # go wrong.
1388                 $wgOut->addWikiTextWithTitle( $text, $this->mTitle );
1389
1390                 if ( !$wgUseDumbLinkUpdate ) {
1391                         # Move the current links back to the second register
1392                         $wgLinkCache->swapRegisters();
1393
1394                         # Get old version of link table to allow incremental link updates
1395                         # Lock this data now since it is needed for an update
1396                         $wgLinkCache->forUpdate( true );
1397                         $wgLinkCache->preFill( $this->mTitle );
1398
1399                         # Swap this old version back into its rightful place
1400                         $wgLinkCache->swapRegisters();
1401                 }
1402
1403                 if( $this->isRedirect( $text ) )
1404                         $r = 'redirect=no';
1405                 else
1406                         $r = '';
1407                 $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
1408
1409                 if ( $wgUseEnotif  ) {
1410                         # this would be better as an extension hook
1411                         include_once( "UserMailer.php" );
1412                         $wgEnotif = new EmailNotification ();
1413                         $wgEnotif->notifyOnPageChange( $this->mTitle, $now, $summary, $me2, $oldid );
1414                 }
1415                 wfProfileOut( $fname );
1416         }
1417
1418         /**
1419          * Mark this particular edit as patrolled
1420          */
1421         function markpatrolled() {
1422                 global $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgUseRCPatrol, $wgUser;
1423                 $wgOut->setRobotpolicy( 'noindex,follow' );
1424
1425                 if ( !$wgUseRCPatrol )
1426                 {
1427                         $wgOut->errorpage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1428                         return;
1429                 }
1430                 if ( $wgUser->isAnon() )
1431                 {
1432                         $wgOut->loginToUse();
1433                         return;
1434                 }
1435                 if ( $wgOnlySysopsCanPatrol && !$wgUser->isAllowed('patrol') )
1436                 {
1437                         $wgOut->sysopRequired();
1438                         return;
1439                 }
1440                 $rcid = $wgRequest->getVal( 'rcid' );
1441                 if ( !is_null ( $rcid ) )
1442                 {
1443                         RecentChange::markPatrolled( $rcid );
1444                         $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
1445                         $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
1446
1447                         $rcTitle = Title::makeTitle( NS_SPECIAL, 'Recentchanges' );
1448                         $wgOut->returnToMain( false, $rcTitle->getPrefixedText() );
1449                 }
1450                 else
1451                 {
1452                         $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1453                 }
1454         }
1455
1456         /**
1457          * Validate function
1458          */
1459         function validate() {
1460                 global $wgOut, $wgUser, $wgRequest, $wgUseValidation;
1461
1462                 if ( !$wgUseValidation ) # Are we using article validation at all?
1463                 {
1464                         $wgOut->setStatusCode( 404 );
1465                         $wgOut->errorpage( "nosuchspecialpage", "nospecialpagetext" );
1466                         return ;
1467                 }
1468
1469                 $wgOut->setRobotpolicy( 'noindex,follow' );
1470                 $revision = $wgRequest->getVal( 'revision' );
1471
1472                 include_once ( "SpecialValidate.php" ) ; # The "Validation" class
1473
1474                 $v = new Validation ;
1475                 if ( $wgRequest->getVal ( "mode" , "" ) == "list" )
1476                         $t = $v->showList ( $this ) ;
1477                 else if ( $wgRequest->getVal ( "mode" , "" ) == "details" )
1478                         $t = $v->showDetails ( $this , $wgRequest->getVal( 'revision' ) ) ;
1479                 else
1480                         $t = $v->validatePageForm ( $this , $revision ) ;
1481
1482                 $wgOut->addHTML ( $t ) ;
1483         }
1484
1485         /**
1486          * Add this page to $wgUser's watchlist
1487          */
1488
1489         function watch() {
1490
1491                 global $wgUser, $wgOut;
1492
1493                 if ( $wgUser->isAnon() ) {
1494                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1495                         return;
1496                 }
1497                 if ( wfReadOnly() ) {
1498                         $wgOut->readOnlyPage();
1499                         return;
1500                 }
1501
1502                 if (wfRunHooks('WatchArticle', array(&$wgUser, &$this))) {
1503
1504                         $wgUser->addWatch( $this->mTitle );
1505                         $wgUser->saveSettings();
1506
1507                         wfRunHooks('WatchArticleComplete', array(&$wgUser, &$this));
1508
1509                         $wgOut->setPagetitle( wfMsg( 'addedwatch' ) );
1510                         $wgOut->setRobotpolicy( 'noindex,follow' );
1511
1512                         $link = $this->mTitle->getPrefixedText();
1513                         $text = wfMsg( 'addedwatchtext', $link );
1514                         $wgOut->addWikiText( $text );
1515                 }
1516
1517                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1518         }
1519
1520         /**
1521          * Stop watching a page
1522          */
1523
1524         function unwatch() {
1525
1526                 global $wgUser, $wgOut;
1527
1528                 if ( $wgUser->isAnon() ) {
1529                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1530                         return;
1531                 }
1532                 if ( wfReadOnly() ) {
1533                         $wgOut->readOnlyPage();
1534                         return;
1535                 }
1536
1537                 if (wfRunHooks('UnwatchArticle', array(&$wgUser, &$this))) {
1538
1539                         $wgUser->removeWatch( $this->mTitle );
1540                         $wgUser->saveSettings();
1541
1542                         wfRunHooks('UnwatchArticleComplete', array(&$wgUser, &$this));
1543
1544                         $wgOut->setPagetitle( wfMsg( 'removedwatch' ) );
1545                         $wgOut->setRobotpolicy( 'noindex,follow' );
1546
1547                         $link = $this->mTitle->getPrefixedText();
1548                         $text = wfMsg( 'removedwatchtext', $link );
1549                         $wgOut->addWikiText( $text );
1550                 }
1551
1552                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1553         }
1554
1555         /**
1556          * protect a page
1557          */
1558         function protect( $limit = 'sysop' ) {
1559                 global $wgUser, $wgOut, $wgRequest;
1560
1561                 if ( ! $wgUser->isAllowed('protect') ) {
1562                         $wgOut->sysopRequired();
1563                         return;
1564                 }
1565                 if ( wfReadOnly() ) {
1566                         $wgOut->readOnlyPage();
1567                         return;
1568                 }
1569                 $id = $this->mTitle->getArticleID();
1570                 if ( 0 == $id ) {
1571                         $wgOut->fatalError( wfMsg( 'badarticleerror' ) );
1572                         return;
1573                 }
1574
1575                 $confirm = $wgRequest->wasPosted() &&
1576                         $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
1577                 $moveonly = $wgRequest->getBool( 'wpMoveOnly' );
1578                 $reason = $wgRequest->getText( 'wpReasonProtect' );
1579
1580                 if ( $confirm ) {
1581                         $dbw =& wfGetDB( DB_MASTER );
1582                         $dbw->update( 'page',
1583                                 array( /* SET */
1584                                         'page_touched' => $dbw->timestamp(),
1585                                         'page_restrictions' => (string)$limit
1586                                 ), array( /* WHERE */
1587                                         'page_id' => $id
1588                                 ), 'Article::protect'
1589                         );
1590
1591                         $restrictions = "move=" . $limit;
1592                         if( !$moveonly ) {
1593                                 $restrictions .= ":edit=" . $limit;
1594                         }
1595                         if (wfRunHooks('ArticleProtect', array(&$this, &$wgUser, $limit == 'sysop', $reason, $moveonly))) {
1596
1597                                 $dbw =& wfGetDB( DB_MASTER );
1598                                 $dbw->update( 'page',
1599                                                           array( /* SET */
1600                                                                          'page_touched' => $dbw->timestamp(),
1601                                                                          'page_restrictions' => $restrictions
1602                                                                          ), array( /* WHERE */
1603                                                                                            'page_id' => $id
1604                                                                                            ), 'Article::protect'
1605                                                           );
1606
1607                                 wfRunHooks('ArticleProtectComplete', array(&$this, &$wgUser, $limit == 'sysop', $reason, $moveonly));
1608
1609                                 $log = new LogPage( 'protect' );
1610                                 if ( $limit === '' ) {
1611                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1612                                 } else {
1613                                         $log->addEntry( 'protect', $this->mTitle, $reason );
1614                                 }
1615                                 $wgOut->redirect( $this->mTitle->getFullURL() );
1616                         }
1617                         return;
1618                 } else {
1619                         return $this->confirmProtect( '', '', $limit );
1620                 }
1621         }
1622
1623         /**
1624          * Output protection confirmation dialog
1625          */
1626         function confirmProtect( $par, $reason, $limit = 'sysop'  ) {
1627                 global $wgOut, $wgUser;
1628
1629                 wfDebug( "Article::confirmProtect\n" );
1630
1631                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1632                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1633
1634                 $check = '';
1635                 $protcom = '';
1636                 $moveonly = '';
1637
1638                 if ( $limit === '' ) {
1639                         $wgOut->setPageTitle( wfMsg( 'confirmunprotect' ) );
1640                         $wgOut->setSubtitle( wfMsg( 'unprotectsub', $sub ) );
1641                         $wgOut->addWikiText( wfMsg( 'confirmunprotecttext' ) );
1642                         $protcom = htmlspecialchars( wfMsg( 'unprotectcomment' ) );
1643                         $formaction = $this->mTitle->escapeLocalURL( 'action=unprotect' . $par );
1644                 } else {
1645                         $wgOut->setPageTitle( wfMsg( 'confirmprotect' ) );
1646                         $wgOut->setSubtitle( wfMsg( 'protectsub', $sub ) );
1647                         $wgOut->addWikiText( wfMsg( 'confirmprotecttext' ) );
1648                         $moveonly = htmlspecialchars( wfMsg( 'protectmoveonly' ) );
1649                         $protcom = htmlspecialchars( wfMsg( 'protectcomment' ) );
1650                         $formaction = $this->mTitle->escapeLocalURL( 'action=protect' . $par );
1651                 }
1652
1653                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1654                 $token = htmlspecialchars( $wgUser->editToken() );
1655
1656                 $wgOut->addHTML( "
1657 <form id='protectconfirm' method='post' action=\"{$formaction}\">
1658         <table border='0'>
1659                 <tr>
1660                         <td align='right'>
1661                                 <label for='wpReasonProtect'>{$protcom}:</label>
1662                         </td>
1663                         <td align='left'>
1664                                 <input type='text' size='60' name='wpReasonProtect' id='wpReasonProtect' value=\"" . htmlspecialchars( $reason ) . "\" />
1665                         </td>
1666                 </tr>" );
1667                 if($moveonly != '') {
1668                         $wgOut->AddHTML( "
1669                 <tr>
1670                         <td align='right'>
1671                                 <input type='checkbox' name='wpMoveOnly' value='1' id='wpMoveOnly' />
1672                         </td>
1673                         <td align='left'>
1674                                 <label for='wpMoveOnly'>{$moveonly}</label>
1675                         </td>
1676                 </tr> " );
1677                 }
1678                 $wgOut->addHTML( "
1679                 <tr>
1680                         <td>&nbsp;</td>
1681                         <td>
1682                                 <input type='submit' name='wpConfirmProtectB' value=\"{$confirm}\" />
1683                         </td>
1684                 </tr>
1685         </table>
1686         <input type='hidden' name='wpEditToken' value=\"{$token}\" />
1687 </form>" );
1688
1689                 $wgOut->returnToMain( false );
1690         }
1691
1692         /**
1693          * Unprotect the pages
1694          */
1695         function unprotect() {
1696                 return $this->protect( '' );
1697         }
1698
1699         /*
1700          * UI entry point for page deletion
1701          */
1702         function delete() {
1703                 global $wgUser, $wgOut, $wgMessageCache, $wgRequest;
1704                 $fname = 'Article::delete';
1705                 $confirm = $wgRequest->wasPosted() &&
1706                         $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
1707                 $reason = $wgRequest->getText( 'wpReason' );
1708
1709                 # This code desperately needs to be totally rewritten
1710
1711                 # Check permissions
1712                 if( ( !$wgUser->isAllowed( 'delete' ) ) ) {
1713                         $wgOut->sysopRequired();
1714                         return;
1715                 }
1716                 if( wfReadOnly() ) {
1717                         $wgOut->readOnlyPage();
1718                         return;
1719                 }
1720
1721                 # Better double-check that it hasn't been deleted yet!
1722                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1723                 if( !$this->mTitle->exists() ) {
1724                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1725                         return;
1726                 }
1727
1728                 if( $confirm ) {
1729                         $this->doDelete( $reason );
1730                         return;
1731                 }
1732
1733                 # determine whether this page has earlier revisions
1734                 # and insert a warning if it does
1735                 # we select the text because it might be useful below
1736                 $dbr =& $this->getDB();
1737                 $ns = $this->mTitle->getNamespace();
1738                 $title = $this->mTitle->getDBkey();
1739                 $revisions = $dbr->select( array( 'page', 'revision' ),
1740                         array( 'rev_id', 'rev_user_text' ),
1741                         array(
1742                                 'page_namespace' => $ns,
1743                                 'page_title' => $title,
1744                                 'rev_page = page_id'
1745                         ), $fname, $this->getSelectOptions( array( 'ORDER BY' => 'rev_timestamp DESC' ) )
1746                 );
1747
1748                 if( $dbr->numRows( $revisions ) > 1 && !$confirm ) {
1749                         $skin=$wgUser->getSkin();
1750                         $wgOut->addHTML('<b>'.wfMsg('historywarning'));
1751                         $wgOut->addHTML( $skin->historyLink() .'</b>');
1752                 }
1753
1754                 # Fetch cur_text
1755                 $rev = Revision::newFromTitle( $this->mTitle );
1756
1757                 # Fetch name(s) of contributors
1758                 $rev_name = '';
1759                 $all_same_user = true;
1760                 while( $row = $dbr->fetchObject( $revisions ) ) {
1761                         if( $rev_name != '' && $rev_name != $row->rev_user_text ) {
1762                                 $all_same_user = false;
1763                         } else {
1764                                 $rev_name = $row->rev_user_text;
1765                         }
1766                 }
1767
1768                 if( !is_null( $rev ) ) {
1769                         # if this is a mini-text, we can paste part of it into the deletion reason
1770                         $text = $rev->getText();
1771
1772                         #if this is empty, an earlier revision may contain "useful" text
1773                         $blanked = false;
1774                         if( $text == '' ) {
1775                                 $prev = $rev->getPrevious();
1776                                 if( $prev ) {
1777                                         $text = $prev->getText();
1778                                         $blanked = true;
1779                                 }
1780                         }
1781
1782                         $length = strlen( $text );
1783
1784                         # this should not happen, since it is not possible to store an empty, new
1785                         # page. Let's insert a standard text in case it does, though
1786                         if( $length == 0 && $reason === '' ) {
1787                                 $reason = wfMsgForContent( 'exblank' );
1788                         }
1789
1790                         if( $length < 500 && $reason === '' ) {
1791                                 # comment field=255, let's grep the first 150 to have some user
1792                                 # space left
1793                                 global $wgContLang;
1794                                 $text = $wgContLang->truncate( $text, 150, '...' );
1795
1796                                 # let's strip out newlines
1797                                 $text = preg_replace( "/[\n\r]/", '', $text );
1798
1799                                 if( !$blanked ) {
1800                                         if( !$all_same_user ) {
1801                                                 $reason = wfMsgForContent( 'excontent', $text );
1802                                         } else {
1803                                                 $reason = wfMsgForContent( 'excontentauthor', $text, $rev_name );
1804                                         }
1805                                 } else {
1806                                         $reason = wfMsgForContent( 'exbeforeblank', $text );
1807                                 }
1808                         }
1809                 }
1810
1811                 return $this->confirmDelete( '', $reason );
1812         }
1813
1814         /**
1815          * Output deletion confirmation dialog
1816          */
1817         function confirmDelete( $par, $reason ) {
1818                 global $wgOut, $wgUser;
1819
1820                 wfDebug( "Article::confirmDelete\n" );
1821
1822                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1823                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1824                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1825                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1826
1827                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1828
1829                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1830                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1831                 $token = htmlspecialchars( $wgUser->editToken() );
1832
1833                 $wgOut->addHTML( "
1834 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1835         <table border='0'>
1836                 <tr>
1837                         <td align='right'>
1838                                 <label for='wpReason'>{$delcom}:</label>
1839                         </td>
1840                         <td align='left'>
1841                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1842                         </td>
1843                 </tr>
1844                 <tr>
1845                         <td>&nbsp;</td>
1846                         <td>
1847                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1848                         </td>
1849                 </tr>
1850         </table>
1851         <input type='hidden' name='wpEditToken' value=\"{$token}\" />
1852 </form>\n" );
1853
1854                 $wgOut->returnToMain( false );
1855         }
1856
1857
1858         /**
1859          * Perform a deletion and output success or failure messages
1860          */
1861         function doDelete( $reason ) {
1862                 global $wgOut, $wgUser, $wgContLang;
1863                 $fname = 'Article::doDelete';
1864                 wfDebug( $fname."\n" );
1865
1866                 if (wfRunHooks('ArticleDelete', array(&$this, &$wgUser, &$reason))) {
1867                         if ( $this->doDeleteArticle( $reason ) ) {
1868                                 $deleted = $this->mTitle->getPrefixedText();
1869
1870                                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1871                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1872
1873                                 $loglink = '[[Special:Log/delete|' . wfMsg( 'deletionlog' ) . ']]';
1874                                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
1875
1876                                 $wgOut->addWikiText( $text );
1877                                 $wgOut->returnToMain( false );
1878                                 wfRunHooks('ArticleDeleteComplete', array(&$this, &$wgUser, $reason));
1879                         } else {
1880                                 $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1881                         }
1882                 }
1883         }
1884
1885         /**
1886          * Back-end article deletion
1887          * Deletes the article with database consistency, writes logs, purges caches
1888          * Returns success
1889          */
1890         function doDeleteArticle( $reason ) {
1891                 global $wgUser;
1892                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer, $wgPostCommitUpdateList;
1893                 global $wgUseTrackbacks;
1894
1895                 $fname = 'Article::doDeleteArticle';
1896                 wfDebug( $fname."\n" );
1897
1898                 $dbw =& wfGetDB( DB_MASTER );
1899                 $ns = $this->mTitle->getNamespace();
1900                 $t = $this->mTitle->getDBkey();
1901                 $id = $this->mTitle->getArticleID();
1902
1903                 if ( $t == '' || $id == 0 ) {
1904                         return false;
1905                 }
1906
1907                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ), -1 );
1908                 array_push( $wgDeferredUpdateList, $u );
1909
1910                 $linksTo = $this->mTitle->getLinksTo();
1911
1912                 # Squid purging
1913                 if ( $wgUseSquid ) {
1914                         $urls = array(
1915                                 $this->mTitle->getInternalURL(),
1916                                 $this->mTitle->getInternalURL( 'history' )
1917                         );
1918
1919                         $u = SquidUpdate::newFromTitles( $linksTo, $urls );
1920                         array_push( $wgPostCommitUpdateList, $u );
1921
1922                 }
1923
1924                 # Client and file cache invalidation
1925                 Title::touchArray( $linksTo );
1926
1927
1928                 // For now, shunt the revision data into the archive table.
1929                 // Text is *not* removed from the text table; bulk storage
1930                 // is left intact to avoid breaking block-compression or
1931                 // immutable storage schemes.
1932                 //
1933                 // For backwards compatibility, note that some older archive
1934                 // table entries will have ar_text and ar_flags fields still.
1935                 //
1936                 // In the future, we may keep revisions and mark them with
1937                 // the rev_deleted field, which is reserved for this purpose.
1938                 $dbw->insertSelect( 'archive', array( 'page', 'revision' ),
1939                         array(
1940                                 'ar_namespace'  => 'page_namespace',
1941                                 'ar_title'      => 'page_title',
1942                                 'ar_comment'    => 'rev_comment',
1943                                 'ar_user'       => 'rev_user',
1944                                 'ar_user_text'  => 'rev_user_text',
1945                                 'ar_timestamp'  => 'rev_timestamp',
1946                                 'ar_minor_edit' => 'rev_minor_edit',
1947                                 'ar_rev_id'     => 'rev_id',
1948                                 'ar_text_id'    => 'rev_text_id',
1949                         ), array(
1950                                 'page_id' => $id,
1951                                 'page_id = rev_page'
1952                         ), $fname
1953                 );
1954
1955                 # Now that it's safely backed up, delete it
1956                 $dbw->delete( 'revision', array( 'rev_page' => $id ), $fname );
1957                 $dbw->delete( 'page', array( 'page_id' => $id ), $fname);
1958
1959                 if ($wgUseTrackbacks)
1960                         $dbw->delete( 'trackbacks', array( 'tb_page' => $id ), $fname );
1961
1962                 # Clean up recentchanges entries...
1963                 $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), $fname );
1964
1965                 # Finally, clean up the link tables
1966                 $t = $this->mTitle->getPrefixedDBkey();
1967
1968                 Article::onArticleDelete( $this->mTitle );
1969
1970                 # Delete outgoing links
1971                 $dbw->delete( 'pagelinks', array( 'pl_from' => $id ) );
1972                 $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
1973                 $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
1974
1975                 # Log the deletion
1976                 $log = new LogPage( 'delete' );
1977                 $log->addEntry( 'delete', $this->mTitle, $reason );
1978
1979                 # Clear the cached article id so the interface doesn't act like we exist
1980                 $this->mTitle->resetArticleID( 0 );
1981                 $this->mTitle->mArticleID = 0;
1982                 return true;
1983         }
1984
1985         /**
1986          * Revert a modification
1987          */
1988         function rollback() {
1989                 global $wgUser, $wgOut, $wgRequest;
1990                 $fname = 'Article::rollback';
1991
1992                 if ( ! $wgUser->isAllowed('rollback') ) {
1993                         $wgOut->sysopRequired();
1994                         return;
1995                 }
1996                 if ( wfReadOnly() ) {
1997                         $wgOut->readOnlyPage( $this->getContent( true ) );
1998                         return;
1999                 }
2000                 if( !$wgUser->matchEditToken( $wgRequest->getVal( 'token' ),
2001                         array( $this->mTitle->getPrefixedText(),
2002                                 $wgRequest->getVal( 'from' ) )  ) ) {
2003                         $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
2004                         $wgOut->addWikiText( wfMsg( 'sessionfailure' ) );
2005                         return;
2006                 }
2007                 $dbw =& wfGetDB( DB_MASTER );
2008
2009                 # Enhanced rollback, marks edits rc_bot=1
2010                 $bot = $wgRequest->getBool( 'bot' );
2011
2012                 # Replace all this user's current edits with the next one down
2013                 $tt = $this->mTitle->getDBKey();
2014                 $n = $this->mTitle->getNamespace();
2015
2016                 # Get the last editor, lock table exclusively
2017                 $dbw->begin();
2018                 $current = Revision::newFromTitle( $this->mTitle );
2019                 if( is_null( $current ) ) {
2020                         # Something wrong... no page?
2021                         $dbw->rollback();
2022                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
2023                         return;
2024                 }
2025
2026                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
2027                 if( $from != $current->getUserText() ) {
2028                         $wgOut->setPageTitle( wfMsg('rollbackfailed') );
2029                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
2030                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
2031                                 htmlspecialchars( $from ),
2032                                 htmlspecialchars( $current->getUserText() ) ) );
2033                         if( $current->getComment() != '') {
2034                                 $wgOut->addHTML(
2035                                         wfMsg( 'editcomment',
2036                                         htmlspecialchars( $current->getComment() ) ) );
2037                         }
2038                         return;
2039                 }
2040
2041                 # Get the last edit not by this guy
2042                 $user = intval( $current->getUser() );
2043                 $user_text = $dbw->addQuotes( $current->getUserText() );
2044                 $s = $dbw->selectRow( 'revision',
2045                         array( 'rev_id', 'rev_timestamp' ),
2046                         array(
2047                                 'rev_page' => $current->getPage(),
2048                                 "rev_user <> {$user} OR rev_user_text <> {$user_text}"
2049                         ), $fname,
2050                         array(
2051                                 'USE INDEX' => 'page_timestamp',
2052                                 'ORDER BY'  => 'rev_timestamp DESC' )
2053                         );
2054                 if( $s === false ) {
2055                         # Something wrong
2056                         $dbw->rollback();
2057                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
2058                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
2059                         return;
2060                 }
2061
2062                 if ( $bot ) {
2063                         # Mark all reverted edits as bot
2064                         $dbw->update( 'recentchanges',
2065                                 array( /* SET */
2066                                         'rc_bot' => 1
2067                                 ), array( /* WHERE */
2068                                         'rc_cur_id'    => $current->getPage(),
2069                                         'rc_user_text' => $current->getUserText(),
2070                                         "rc_timestamp > '{$s->rev_timestamp}'",
2071                                 ), $fname
2072                         );
2073                 }
2074
2075                 # Save it!
2076                 $target = Revision::newFromId( $s->rev_id );
2077                 $newcomment = wfMsgForContent( 'revertpage', $target->getUserText(), $from );
2078
2079                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
2080                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
2081                 $wgOut->addHTML( '<h2>' . htmlspecialchars( $newcomment ) . "</h2>\n<hr />\n" );
2082
2083                 $this->updateArticle( $target->getText(), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
2084                 Article::onArticleEdit( $this->mTitle );
2085
2086                 $dbw->commit();
2087                 $wgOut->returnToMain( false );
2088         }
2089
2090
2091         /**
2092          * Do standard deferred updates after page view
2093          * @private
2094          */
2095         function viewUpdates() {
2096                 global $wgDeferredUpdateList, $wgUseEnotif;
2097
2098                 if ( 0 != $this->getID() ) {
2099                         global $wgDisableCounters;
2100                         if( !$wgDisableCounters ) {
2101                                 Article::incViewCount( $this->getID() );
2102                                 $u = new SiteStatsUpdate( 1, 0, 0 );
2103                                 array_push( $wgDeferredUpdateList, $u );
2104                         }
2105                 }
2106
2107                 # Update newtalk status if user is reading their own
2108                 # talk page
2109
2110                 global $wgUser;
2111                 if ($this->mTitle->getNamespace() == NS_USER_TALK &&
2112                         $this->mTitle->getText() == $wgUser->getName())
2113                 {
2114                         if ( $wgUseEnotif ) {
2115                                 require_once( 'UserTalkUpdate.php' );
2116                                 $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(), $this->mTitle->getDBkey(), false, false, false );
2117                         } else {
2118                                 $wgUser->setNewtalk(0);
2119                                 $wgUser->saveNewtalk();
2120                         }
2121                 } elseif ( $wgUseEnotif ) {
2122                         $wgUser->clearNotification( $this->mTitle );
2123                 }
2124
2125         }
2126
2127         /**
2128          * Do standard deferred updates after page edit.
2129          * Every 1000th edit, prune the recent changes table.
2130          * @private
2131          * @param string $text
2132          */
2133         function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange) {
2134                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
2135                 global $wgMessageCache, $wgUser, $wgUseEnotif;
2136
2137
2138                 if ( wfRunHooks( 'ArticleEditUpdatesDeleteFromRecentchanges', &$this ) ) {
2139                         wfSeedRandom();
2140                         if ( 0 == mt_rand( 0, 999 ) ) {
2141                                 # Periodically flush old entries from the recentchanges table.
2142                                 global $wgRCMaxAge;
2143
2144                                 $dbw =& wfGetDB( DB_MASTER );
2145                                 $cutoff = $dbw->timestamp( time() - $wgRCMaxAge );
2146                                 $recentchanges = $dbw->tableName( 'recentchanges' );
2147                                 $sql = "DELETE FROM $recentchanges WHERE rc_timestamp < '{$cutoff}'";
2148                                 $dbw->query( $sql );
2149                         }
2150                 }
2151
2152                 $id = $this->getID();
2153                 $title = $this->mTitle->getPrefixedDBkey();
2154                 $shortTitle = $this->mTitle->getDBkey();
2155
2156                 if ( 0 != $id ) {
2157                         $u = new LinksUpdate( $id, $title );
2158                         array_push( $wgDeferredUpdateList, $u );
2159                         $u = new SiteStatsUpdate( 0, 1, $this->mGoodAdjustment, $this->mTotalAdjustment );
2160                         array_push( $wgDeferredUpdateList, $u );
2161                         $u = new SearchUpdate( $id, $title, $text );
2162                         array_push( $wgDeferredUpdateList, $u );
2163
2164                         # If this is another user's talk page, update newtalk
2165
2166                         if ($this->mTitle->getNamespace() == NS_USER_TALK && $shortTitle != $wgUser->getName()) {
2167                                 if ( $wgUseEnotif ) {
2168                                         require_once( 'UserTalkUpdate.php' );
2169                                         $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle, $summary,
2170                                           $minoredit, $timestamp_of_pagechange);
2171                                 } else {
2172                                         $other = User::newFromName( $shortTitle );
2173                                         if( is_null( $other ) && User::isIP( $shortTitle ) ) {
2174                                                 // An anonymous user
2175                                                 $other = new User();
2176                                                 $other->setName( $shortTitle );
2177                                         }
2178                                         if( $other ) {
2179                                                 $other->setNewtalk(1);
2180                                                 $other->saveNewtalk();
2181                                         }
2182                                 }
2183                         }
2184
2185                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
2186                                 $wgMessageCache->replace( $shortTitle, $text );
2187                         }
2188                 }
2189         }
2190
2191         /**
2192          * @todo document this function
2193          * @private
2194          * @param string $oldid         Revision ID of this article revision
2195          */
2196         function setOldSubtitle( $oldid=0 ) {
2197                 global $wgLang, $wgOut, $wgUser;
2198
2199                 $current = ( $oldid == $this->mLatest );
2200                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
2201                 $sk = $wgUser->getSkin();
2202                 $lnk = $current
2203                         ? wfMsg( 'currentrevisionlink' )
2204                         : $lnk = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
2205                 $prevlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid );
2206                 $nextlink = $current
2207                         ? wfMsg( 'nextrevision' )
2208                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
2209                 $r = wfMsg( 'revisionasofwithlink', $td, $lnk, $prevlink, $nextlink );
2210                 $wgOut->setSubtitle( $r );
2211         }
2212
2213         /**
2214          * This function is called right before saving the wikitext,
2215          * so we can do things like signatures and links-in-context.
2216          *
2217          * @param string $text
2218          */
2219         function preSaveTransform( $text ) {
2220                 global $wgParser, $wgUser;
2221                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
2222         }
2223
2224         /* Caching functions */
2225
2226         /**
2227          * checkLastModified returns true if it has taken care of all
2228          * output to the client that is necessary for this request.
2229          * (that is, it has sent a cached version of the page)
2230          */
2231         function tryFileCache() {
2232                 static $called = false;
2233                 if( $called ) {
2234                         wfDebug( " tryFileCache() -- called twice!?\n" );
2235                         return;
2236                 }
2237                 $called = true;
2238                 if($this->isFileCacheable()) {
2239                         $touched = $this->mTouched;
2240                         $cache = new CacheManager( $this->mTitle );
2241                         if($cache->isFileCacheGood( $touched )) {
2242                                 global $wgOut;
2243                                 wfDebug( " tryFileCache() - about to load\n" );
2244                                 $cache->loadFromFileCache();
2245                                 return true;
2246                         } else {
2247                                 wfDebug( " tryFileCache() - starting buffer\n" );
2248                                 ob_start( array(&$cache, 'saveToFileCache' ) );
2249                         }
2250                 } else {
2251                         wfDebug( " tryFileCache() - not cacheable\n" );
2252                 }
2253         }
2254
2255         /**
2256          * Check if the page can be cached
2257          * @return bool
2258          */
2259         function isFileCacheable() {
2260                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
2261                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
2262
2263                 return $wgUseFileCache
2264                         and (!$wgShowIPinHeader)
2265                         and ($this->getID() != 0)
2266                         and ($wgUser->isAnon())
2267                         and (!$wgUser->getNewtalk())
2268                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
2269                         and (empty( $action ) || $action == 'view')
2270                         and (!isset($oldid))
2271                         and (!isset($diff))
2272                         and (!isset($redirect))
2273                         and (!isset($printable))
2274                         and (!$this->mRedirectedFrom);
2275         }
2276
2277         /**
2278          * Loads cur_touched and returns a value indicating if it should be used
2279          *
2280          */
2281         function checkTouched() {
2282                 $fname = 'Article::checkTouched';
2283                 if( !$this->mDataLoaded ) {
2284                         $dbr =& $this->getDB();
2285                         $data = $this->pageDataFromId( $dbr, $this->getId() );
2286                         if( $data ) {
2287                                 $this->loadPageData( $data );
2288                         }
2289                 }
2290                 return !$this->mIsRedirect;
2291         }
2292
2293         /**
2294          * Edit an article without doing all that other stuff
2295          * The article must already exist; link tables etc
2296          * are not updated, caches are not flushed.
2297          *
2298          * @param string $text text submitted
2299          * @param string $comment comment submitted
2300          * @param bool $minor whereas it's a minor modification
2301          */
2302         function quickEdit( $text, $comment = '', $minor = 0 ) {
2303                 $fname = 'Article::quickEdit';
2304                 wfProfileIn( $fname );
2305
2306                 $dbw =& wfGetDB( DB_MASTER );
2307                 $dbw->begin();
2308                 $revision = new Revision( array(
2309                         'page'       => $this->getId(),
2310                         'text'       => $text,
2311                         'comment'    => $comment,
2312                         'minor_edit' => $minor ? 1 : 0,
2313                         ) );
2314                 $revisionId = $revision->insertOn( $dbw );
2315                 $this->updateRevisionOn( $dbw, $revision );
2316                 $dbw->commit();
2317
2318                 wfProfileOut( $fname );
2319         }
2320
2321         /**
2322          * Used to increment the view counter
2323          *
2324          * @static
2325          * @param integer $id article id
2326          */
2327         function incViewCount( $id ) {
2328                 $id = intval( $id );
2329                 global $wgHitcounterUpdateFreq;
2330
2331                 $dbw =& wfGetDB( DB_MASTER );
2332                 $pageTable = $dbw->tableName( 'page' );
2333                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
2334                 $acchitsTable = $dbw->tableName( 'acchits' );
2335
2336                 if( $wgHitcounterUpdateFreq <= 1 ){ //
2337                         $dbw->query( "UPDATE $pageTable SET page_counter = page_counter + 1 WHERE page_id = $id" );
2338                         return;
2339                 }
2340
2341                 # Not important enough to warrant an error page in case of failure
2342                 $oldignore = $dbw->ignoreErrors( true );
2343
2344                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2345
2346                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2347                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2348                         # Most of the time (or on SQL errors), skip row count check
2349                         $dbw->ignoreErrors( $oldignore );
2350                         return;
2351                 }
2352
2353                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2354                 $row = $dbw->fetchObject( $res );
2355                 $rown = intval( $row->n );
2356                 if( $rown >= $wgHitcounterUpdateFreq ){
2357                         wfProfileIn( 'Article::incViewCount-collect' );
2358                         $old_user_abort = ignore_user_abort( true );
2359
2360                         $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2361                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable TYPE=HEAP ".
2362                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2363                                 'GROUP BY hc_id');
2364                         $dbw->query("DELETE FROM $hitcounterTable");
2365                         $dbw->query('UNLOCK TABLES');
2366                         $dbw->query("UPDATE $pageTable,$acchitsTable SET page_counter=page_counter + hc_n ".
2367                                 'WHERE page_id = hc_id');
2368                         $dbw->query("DROP TABLE $acchitsTable");
2369
2370                         ignore_user_abort( $old_user_abort );
2371                         wfProfileOut( 'Article::incViewCount-collect' );
2372                 }
2373                 $dbw->ignoreErrors( $oldignore );
2374         }
2375
2376         /**#@+
2377          * The onArticle*() functions are supposed to be a kind of hooks
2378          * which should be called whenever any of the specified actions
2379          * are done.
2380          *
2381          * This is a good place to put code to clear caches, for instance.
2382          *
2383          * This is called on page move and undelete, as well as edit
2384          * @static
2385          * @param $title_obj a title object
2386          */
2387
2388         function onArticleCreate($title_obj) {
2389                 global $wgUseSquid, $wgPostCommitUpdateList;
2390
2391                 $title_obj->touchLinks();
2392                 $titles = $title_obj->getLinksTo();
2393
2394                 # Purge squid
2395                 if ( $wgUseSquid ) {
2396                         $urls = $title_obj->getSquidURLs();
2397                         foreach ( $titles as $linkTitle ) {
2398                                 $urls[] = $linkTitle->getInternalURL();
2399                         }
2400                         $u = new SquidUpdate( $urls );
2401                         array_push( $wgPostCommitUpdateList, $u );
2402                 }
2403         }
2404
2405         function onArticleDelete( $title ) {
2406                 global $wgMessageCache;
2407
2408                 $title->touchLinks();
2409
2410                 if( $title->getNamespace() == NS_MEDIAWIKI) {
2411                         $wgMessageCache->replace( $title->getDBkey(), false );
2412                 }
2413         }
2414
2415         function onArticleEdit($title_obj) {
2416                 // This would be an appropriate place to purge caches.
2417                 // Why's this not in here now?
2418         }
2419
2420         /**#@-*/
2421
2422         /**
2423          * Info about this page
2424          * Called for ?action=info when $wgAllowPageInfo is on.
2425          *
2426          * @access public
2427          */
2428         function info() {
2429                 global $wgLang, $wgOut, $wgAllowPageInfo, $wgUser;
2430                 $fname = 'Article::info';
2431
2432                 if ( !$wgAllowPageInfo ) {
2433                         $wgOut->setStatusCode( 400 );
2434                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
2435                         return;
2436                 }
2437
2438                 $page = $this->mTitle->getSubjectPage();
2439
2440                 $wgOut->setPagetitle( $page->getPrefixedText() );
2441                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
2442
2443                 # first, see if the page exists at all.
2444                 $exists = $page->getArticleId() != 0;
2445                 if( !$exists ) {
2446                         $wgOut->addHTML( wfMsg( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon' ) );
2447                 } else {
2448                         $dbr =& $this->getDB( DB_SLAVE );
2449                         $wl_clause = array(
2450                                 'wl_title'     => $page->getDBkey(),
2451                                 'wl_namespace' => $page->getNamespace() );
2452                         $numwatchers = $dbr->selectField(
2453                                 'watchlist',
2454                                 'COUNT(*)',
2455                                 $wl_clause,
2456                                 $fname,
2457                                 $this->getSelectOptions() );
2458
2459                         $pageInfo = $this->pageCountInfo( $page );
2460                         $talkInfo = $this->pageCountInfo( $page->getTalkPage() );
2461
2462                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $wgLang->formatNum( $numwatchers ) ) . '</li>' );
2463                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $wgLang->formatNum( $pageInfo['edits'] ) ) . '</li>');
2464                         if( $talkInfo ) {
2465                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $wgLang->formatNum( $talkInfo['edits'] ) ) . '</li>');
2466                         }
2467                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $wgLang->formatNum( $pageInfo['authors'] ) ) . '</li>' );
2468                         if( $talkInfo ) {
2469                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $wgLang->formatNum( $talkInfo['authors'] ) ) . '</li>' );
2470                         }
2471                         $wgOut->addHTML( '</ul>' );
2472
2473                 }
2474         }
2475
2476         /**
2477          * Return the total number of edits and number of unique editors
2478          * on a given page. If page does not exist, returns false.
2479          *
2480          * @param Title $title
2481          * @return array
2482          * @access private
2483          */
2484         function pageCountInfo( $title ) {
2485                 $id = $title->getArticleId();
2486                 if( $id == 0 ) {
2487                         return false;
2488                 }
2489
2490                 $dbr =& $this->getDB( DB_SLAVE );
2491
2492                 $rev_clause = array( 'rev_page' => $id );
2493                 $fname = 'Article::pageCountInfo';
2494
2495                 $edits = $dbr->selectField(
2496                         'revision',
2497                         'COUNT(rev_page)',
2498                         $rev_clause,
2499                         $fname,
2500                         $this->getSelectOptions() );
2501
2502                 $authors = $dbr->selectField(
2503                         'revision',
2504                         'COUNT(DISTINCT rev_user_text)',
2505                         $rev_clause,
2506                         $fname,
2507                         $this->getSelectOptions() );
2508
2509                 return array( 'edits' => $edits, 'authors' => $authors );
2510         }
2511
2512         /**
2513          * Return a list of templates used by this article.
2514          * Uses the links table to find the templates
2515          *
2516          * @return array
2517          */
2518         function getUsedTemplates() {
2519                 $result = array();
2520                 $id = $this->mTitle->getArticleID();
2521
2522                 $db =& wfGetDB( DB_SLAVE );
2523                 $res = $db->select( array( 'pagelinks' ),
2524                         array( 'pl_title' ),
2525                         array(
2526                                 'pl_from' => $id,
2527                                 'pl_namespace' => NS_TEMPLATE ),
2528                         'Article:getUsedTemplates' );
2529                 if ( false !== $res ) {
2530                         if ( $db->numRows( $res ) ) {
2531                                 while ( $row = $db->fetchObject( $res ) ) {
2532                                         $result[] = $row->pl_title;
2533                                 }
2534                         }
2535                 }
2536                 $db->freeResult( $res );
2537                 return $result;
2538         }
2539 }
2540
2541 ?>