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