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