includes/Article.php

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