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, $suppressRC=false ) {
 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( $this->mTitle );
 911                 if(!$suppressRC) {
 912                         RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary );
 913                 }
 914
 915                 if ($watchthis) {
 916                         if(!$this->mTitle->userIsWatching()) $this->watch();
 917                 } else {
 918                         if ( $this->mTitle->userIsWatching() ) {
 919                                 $this->unwatch();
 920                         }
 921                 }
 922
 923                 # The talk page isn't in the regular link tables, so we need to update manually:
 924                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 925                 $dbw->update( 'page',
 926                         array( 'page_touched' => $dbw->timestamp($now) ),
 927                         array( 'page_namespace' => $talkns,
 928                                'page_title' => $ttl ),
 929                         $fname );
 930
 931                 # standard deferred updates
 932                 $this->editUpdates( $text, $summary, $isminor, $now );
 933
 934                 $oldid = 0; # new article
 935                 $this->showArticle( $text, wfMsg( 'newarticle' ), false, $isminor, $now, $summary, $oldid );
 936         }
 937
 938         /**
 939          * Fetch and uncompress the text for a given revision.
 940          * Can ask by rev_id number or timestamp (set $field)
 941          */
 942         function fetchRevisionText( $revId = null, $field = 'rev_id' ) {
 943                 $fname = 'Article::fetchRevisionText';
 944                 $dbw =& wfGetDB( DB_MASTER );
 945                 if( $revId ) {
 946                         $rev = $dbw->addQuotes( $revId );
 947                 } else {
 948                         $rev = 'page_latest';
 949                 }
 950                 $result = $dbw->query(
 951                         sprintf( "SELECT old_text, old_flags
 952                                 FROM %s,%s,%s
 953                                 WHERE old_id=rev_id AND rev_page=page_id AND page_id=%d
 954                                 AND %s=%s",
 955                                 $dbw->tableName( 'page' ),
 956                                 $dbw->tableName( 'revision' ),
 957                                 $dbw->tableName( 'text' ),
 958                                 IntVal( $this->mTitle->getArticleId() ),
 959                                 $field,
 960                                 $rev ),
 961                         $fname );
 962                 $obj = $dbw->fetchObject( $result );
 963                 $dbw->freeResult( $result );
 964                 $oldtext = Revision::getRevisionText( $obj );
 965                 return $oldtext;
 966         }
 967
 968         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = '', $edittime = NULL) {
 969                 $fname = 'Article::getTextOfLastEditWithSectionReplacedOrAdded';
 970                 if( is_null( $edittime ) ) {
 971                         $oldtext = $this->fetchRevisionText();
 972                 } else {
 973                         $oldtext = $this->fetchRevisionText( $edittime, 'rev_timestamp' );
 974                 }
 975                 if ($section != '') {
 976                         if($section=='new') {
 977                                 if($summary) $subject="== {$summary} ==\n\n";
 978                                 $text=$oldtext."\n\n".$subject.$text;
 979                         } else {
 980
 981                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 982                                 # comments to be stripped as well)
 983                                 $striparray=array();
 984                                 $parser=new Parser();
 985                                 $parser->mOutputType=OT_WIKI;
 986                                 $oldtext=$parser->strip($oldtext, $striparray, true);
 987
 988                                 # now that we can be sure that no pseudo-sections are in the source,
 989                                 # split it up
 990                                 # Unfortunately we can't simply do a preg_replace because that might
 991                                 # replace the wrong section, so we have to use the section counter instead
 992                                 $secs=preg_split('/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 993                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 994                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 995
 996                                 # section 0 is top (intro) section
 997                                 if($section!=0) {
 998
 999                                         # headline of old section - we need to go through this section
1000                                         # to determine if there are any subsections that now need to
1001                                         # be erased, as the mother section has been replaced with
1002                                         # the text of all subsections.
1003                                         $headline=$secs[$section*2-1];
1004                                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
1005                                         $hlevel=$matches[1];
1006
1007                                         # determine headline level for wikimarkup headings
1008                                         if(strpos($hlevel,'=')!==false) {
1009                                                 $hlevel=strlen($hlevel);
1010                                         }
1011
1012                                         $secs[$section*2-1]=''; // erase old headline
1013                                         $count=$section+1;
1014                                         $break=false;
1015                                         while(!empty($secs[$count*2-1]) && !$break) {
1016
1017                                                 $subheadline=$secs[$count*2-1];
1018                                                 preg_match(
1019                                                  '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
1020                                                 $subhlevel=$matches[1];
1021                                                 if(strpos($subhlevel,'=')!==false) {
1022                                                         $subhlevel=strlen($subhlevel);
1023                                                 }
1024                                                 if($subhlevel > $hlevel) {
1025                                                         // erase old subsections
1026                                                         $secs[$count*2-1]='';
1027                                                         $secs[$count*2]='';
1028                                                 }
1029                                                 if($subhlevel <= $hlevel) {
1030                                                         $break=true;
1031                                                 }
1032                                                 $count++;
1033
1034                                         }
1035
1036                                 }
1037                                 $text=join('',$secs);
1038                                 # reinsert the stuff that we stripped out earlier
1039                                 $text=$parser->unstrip($text,$striparray);
1040                                 $text=$parser->unstripNoWiki($text,$striparray);
1041                         }
1042
1043                 }
1044                 return $text;
1045         }
1046
1047         /**
1048          * Change an existing article. Puts the previous version back into the old table, updates RC
1049          * and all necessary caches, mostly via the deferred update array.
1050          *
1051          * It is possible to call this function from a command-line script, but note that you should
1052          * first set $wgUser, and clean up $wgDeferredUpdates after each edit.
1053          */
1054         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
1055                 global $wgOut, $wgUser;
1056                 global $wgDBtransactions, $wgMwRedir;
1057                 global $wgUseSquid, $wgInternalServer, $wgPostCommitUpdateList;
1058
1059                 $fname = 'Article::updateArticle';
1060                 $good = true;
1061
1062                 $isminor = ( $minor && $wgUser->isLoggedIn() );
1063                 if ( $this->isRedirect( $text ) ) {
1064                         # Remove all content but redirect
1065                         # This could be done by reconstructing the redirect from a title given by
1066                         # Title::newFromRedirect(), but then we wouldn't know which synonym the user
1067                         # wants to see
1068                         if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ')[^\\n]+)/i', $text, $m ) ) {
1069                                 $redir = 1;
1070                                 $text = $m[1] . "\n";
1071                         }
1072                 }
1073                 else { $redir = 0; }
1074
1075                 $text = $this->preSaveTransform( $text );
1076                 $dbw =& wfGetDB( DB_MASTER );
1077
1078                 # Update article, but only if changed.
1079
1080                 # It's important that we either rollback or complete, otherwise an attacker could
1081                 # overwrite cur entries by sending precisely timed user aborts. Random bored users
1082                 # could conceivably have the same effect, especially if cur is locked for long periods.
1083                 if( $wgDBtransactions ) {
1084                         $dbw->query( 'BEGIN', $fname );
1085                 } else {
1086                         $userAbort = ignore_user_abort( true );
1087                 }
1088
1089                 $oldtext = $this->getContent( true );
1090
1091                 if ( 0 != strcmp( $text, $oldtext ) ) {
1092                         $this->mCountAdjustment = $this->isCountable( $text )
1093                           - $this->isCountable( $oldtext );
1094                         $now = wfTimestampNow();
1095
1096                         $lastRevision = $dbw->selectField(
1097                                 'page', 'page_latest', array( 'page_id' => $this->getId() ) );
1098
1099                         $revision = new Revision( array(
1100                                 'page'       => $this->getId(),
1101                                 'comment'    => $summary,
1102                                 'minor_edit' => $isminor,
1103                                 'text'       => $text
1104                                 ) );
1105                         $revisionId = $revision->insertOn( $dbw );
1106
1107                         # Update page
1108                         $ok = $this->updateRevisionOn( $dbw, $revision, $lastRevision );
1109
1110                         if( !$ok ) {
1111                                 /* Belated edit conflict! Run away!! */
1112                                 $good = false;
1113                         } else {
1114                                 # Update recentchanges and purge cache and whatnot
1115                                 $bot = (int)($wgUser->isBot() || $forceBot);
1116                                 RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
1117                                         $lastRevision, $this->getTimestamp(), $bot );
1118                                 Article::onArticleEdit( $this->mTitle );
1119                         }
1120                 }
1121
1122                 if( $wgDBtransactions ) {
1123                         $dbw->query( 'COMMIT', $fname );
1124                 } else {
1125                         ignore_user_abort( $userAbort );
1126                 }
1127
1128                 if ( $good ) {
1129                         if ($watchthis) {
1130                                 if (!$this->mTitle->userIsWatching()) $this->watch();
1131                         } else {
1132                                 if ( $this->mTitle->userIsWatching() ) {
1133                                         $this->unwatch();
1134                                 }
1135                         }
1136                         # standard deferred updates
1137                         $this->editUpdates( $text, $summary, $minor, $now );
1138
1139
1140                         $urls = array();
1141                         # Template namespace
1142                         # Purge all articles linking here
1143                         if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
1144                                 $titles = $this->mTitle->getLinksTo();
1145                                 Title::touchArray( $titles );
1146                                 if ( $wgUseSquid ) {
1147                                                 foreach ( $titles as $title ) {
1148                                                         $urls[] = $title->getInternalURL();
1149                                                 }
1150                                 }
1151                         }
1152
1153                         # Squid updates
1154                         if ( $wgUseSquid ) {
1155                                 $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
1156                                 $u = new SquidUpdate( $urls );
1157                                 array_push( $wgPostCommitUpdateList, $u );
1158                         }
1159
1160                         $this->showArticle( $text, wfMsg( 'updated' ), $sectionanchor, $me2, $now, $summary, $lastRevision );
1161                 }
1162                 return $good;
1163         }
1164
1165         /**
1166          * After we've either updated or inserted the article, update
1167          * the link tables and redirect to the new page.
1168          */
1169         function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid ) {
1170                 global $wgOut, $wgUser, $wgLinkCache, $wgEnotif;
1171
1172                 $wgLinkCache = new LinkCache();
1173                 # Select for update
1174                 $wgLinkCache->forUpdate( true );
1175
1176                 # Get old version of link table to allow incremental link updates
1177                 $wgLinkCache->preFill( $this->mTitle );
1178                 $wgLinkCache->clear();
1179
1180                 # Parse the text and replace links with placeholders
1181                 $wgOut = new OutputPage();
1182                 $wgOut->addWikiText( $text );
1183
1184                 # Look up the links in the DB and add them to the link cache
1185                 $wgOut->transformBuffer( RLH_FOR_UPDATE );
1186
1187                 if( $this->isRedirect( $text ) )
1188                         $r = 'redirect=no';
1189                 else
1190                         $r = '';
1191                 $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
1192
1193                 # this call would better fit into RecentChange::notifyEdit and RecentChange::notifyNew .
1194                 # this will be improved later (to-do)
1195
1196                 include_once( "UserMailer.php" );
1197                 $wgEnotif = new EmailNotification ();
1198                 $wgEnotif->NotifyOnPageChange( $wgUser->getID(), $this->mTitle->getDBkey(), $this->mTitle->getNamespace(),$now, $summary, $me2, $oldid );
1199         }
1200
1201         /**
1202          * Mark this particular edit as patrolled
1203          */
1204         function markpatrolled() {
1205                 global $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgUseRCPatrol, $wgUser;
1206                 $wgOut->setRobotpolicy( 'noindex,follow' );
1207
1208                 if ( !$wgUseRCPatrol )
1209                 {
1210                         $wgOut->errorpage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1211                         return;
1212                 }
1213                 if ( $wgUser->isAnon() )
1214                 {
1215                         $wgOut->loginToUse();
1216                         return;
1217                 }
1218                 if ( $wgOnlySysopsCanPatrol && !$wgUser->isAllowed('patrol') )
1219                 {
1220                         $wgOut->sysopRequired();
1221                         return;
1222                 }
1223                 $rcid = $wgRequest->getVal( 'rcid' );
1224                 if ( !is_null ( $rcid ) )
1225                 {
1226                         RecentChange::markPatrolled( $rcid );
1227                         $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
1228                         $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
1229
1230                         $rcTitle = Title::makeTitle( NS_SPECIAL, 'Recentchanges' );
1231                         $wgOut->returnToMain( false, $rcTitle->getPrefixedText() );
1232                 }
1233                 else
1234                 {
1235                         $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1236                 }
1237         }
1238
1239         /**
1240          * Validate function
1241          */
1242         function validate() {
1243                 global $wgOut, $wgUser, $wgRequest, $wgUseValidation;
1244
1245                 if ( !$wgUseValidation ) # Are we using article validation at all?
1246                 {
1247                         $wgOut->errorpage( "nosuchspecialpage", "nospecialpagetext" );
1248                         return ;
1249                 }
1250
1251                 $wgOut->setRobotpolicy( 'noindex,follow' );
1252                 $revision = $wgRequest->getVal( 'revision' );
1253
1254                 include_once ( "SpecialValidate.php" ) ; # The "Validation" class
1255
1256                 $v = new Validation ;
1257                 if ( $wgRequest->getVal ( "mode" , "" ) == "list" )
1258                         $t = $v->showList ( $this ) ;
1259                 else
1260                         $t = $v->validatePageForm ( $this , $revision ) ;
1261
1262                 $wgOut->addHTML ( $t ) ;
1263         }
1264
1265         /**
1266          * Add this page to $wgUser's watchlist
1267          */
1268
1269         function watch() {
1270
1271                 global $wgUser, $wgOut;
1272
1273                 if ( $wgUser->isAnon() ) {
1274                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1275                         return;
1276                 }
1277                 if ( wfReadOnly() ) {
1278                         $wgOut->readOnlyPage();
1279                         return;
1280                 }
1281
1282                 if (wfRunHooks('WatchArticle', array(&$wgUser, &$this))) {
1283
1284                         $wgUser->addWatch( $this->mTitle );
1285                         $wgUser->saveSettings();
1286
1287                         wfRunHooks('WatchArticleComplete', array(&$wgUser, &$this));
1288
1289                         $wgOut->setPagetitle( wfMsg( 'addedwatch' ) );
1290                         $wgOut->setRobotpolicy( 'noindex,follow' );
1291
1292                         $link = $this->mTitle->getPrefixedText();
1293                         $text = wfMsg( 'addedwatchtext', $link );
1294                         $wgOut->addWikiText( $text );
1295                 }
1296
1297                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1298         }
1299
1300         /**
1301          * Stop watching a page
1302          */
1303
1304         function unwatch() {
1305
1306                 global $wgUser, $wgOut;
1307
1308                 if ( $wgUser->isAnon() ) {
1309                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1310                         return;
1311                 }
1312                 if ( wfReadOnly() ) {
1313                         $wgOut->readOnlyPage();
1314                         return;
1315                 }
1316
1317                 if (wfRunHooks('UnwatchArticle', array(&$wgUser, &$this))) {
1318
1319                         $wgUser->removeWatch( $this->mTitle );
1320                         $wgUser->saveSettings();
1321
1322                         wfRunHooks('UnwatchArticleComplete', array(&$wgUser, &$this));
1323
1324                         $wgOut->setPagetitle( wfMsg( 'removedwatch' ) );
1325                         $wgOut->setRobotpolicy( 'noindex,follow' );
1326
1327                         $link = $this->mTitle->getPrefixedText();
1328                         $text = wfMsg( 'removedwatchtext', $link );
1329                         $wgOut->addWikiText( $text );
1330                 }
1331
1332                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1333         }
1334
1335         /**
1336          * protect a page
1337          */
1338         function protect( $limit = 'sysop' ) {
1339                 global $wgUser, $wgOut, $wgRequest;
1340
1341                 if ( ! $wgUser->isAllowed('protect') ) {
1342                         $wgOut->sysopRequired();
1343                         return;
1344                 }
1345                 if ( wfReadOnly() ) {
1346                         $wgOut->readOnlyPage();
1347                         return;
1348                 }
1349                 $id = $this->mTitle->getArticleID();
1350                 if ( 0 == $id ) {
1351                         $wgOut->fatalError( wfMsg( 'badarticleerror' ) );
1352                         return;
1353                 }
1354
1355                 $confirm = $wgRequest->wasPosted() &&
1356                         $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
1357                 $moveonly = $wgRequest->getBool( 'wpMoveOnly' );
1358                 $reason = $wgRequest->getText( 'wpReasonProtect' );
1359
1360                 if ( $confirm ) {
1361                         $dbw =& wfGetDB( DB_MASTER );
1362                         $dbw->update( 'page',
1363                                 array( /* SET */
1364                                         'page_touched' => $dbw->timestamp(),
1365                                         'page_restrictions' => (string)$limit
1366                                 ), array( /* WHERE */
1367                                         'page_id' => $id
1368                                 ), 'Article::protect'
1369                         );
1370
1371                         $restrictions = "move=" . $limit;
1372                         if( !$moveonly ) {
1373                                 $restrictions .= ":edit=" . $limit;
1374                         }
1375                         if (wfRunHooks('ArticleProtect', array(&$this, &$wgUser, $limit == 'sysop', $reason, $moveonly))) {
1376
1377                                 $dbw =& wfGetDB( DB_MASTER );
1378                                 $dbw->update( 'page',
1379                                                           array( /* SET */
1380                                                                          'page_touched' => $dbw->timestamp(),
1381                                                                          'page_restrictions' => $restrictions
1382                                                                          ), array( /* WHERE */
1383                                                                                            'page_id' => $id
1384                                                                                            ), 'Article::protect'
1385                                                           );
1386
1387                                 wfRunHooks('ArticleProtectComplete', array(&$this, &$wgUser, $limit == 'sysop', $reason, $moveonly));
1388
1389                                 $log = new LogPage( 'protect' );
1390                                 if ( $limit === '' ) {
1391                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1392                                 } else {
1393                                         $log->addEntry( 'protect', $this->mTitle, $reason );
1394                                 }
1395                                 $wgOut->redirect( $this->mTitle->getFullURL() );
1396                         }
1397                         return;
1398                 } else {
1399                         $reason = htmlspecialchars( wfMsg( 'protectreason' ) );
1400                         return $this->confirmProtect( '', $reason, $limit );
1401                 }
1402         }
1403
1404         /**
1405          * Output protection confirmation dialog
1406          */
1407         function confirmProtect( $par, $reason, $limit = 'sysop'  ) {
1408                 global $wgOut, $wgUser;
1409
1410                 wfDebug( "Article::confirmProtect\n" );
1411
1412                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1413                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1414
1415                 $check = '';
1416                 $protcom = '';
1417                 $moveonly = '';
1418
1419                 if ( $limit === '' ) {
1420                         $wgOut->setPageTitle( wfMsg( 'confirmunprotect' ) );
1421                         $wgOut->setSubtitle( wfMsg( 'unprotectsub', $sub ) );
1422                         $wgOut->addWikiText( wfMsg( 'confirmunprotecttext' ) );
1423                         $protcom = htmlspecialchars( wfMsg( 'unprotectcomment' ) );
1424                         $formaction = $this->mTitle->escapeLocalURL( 'action=unprotect' . $par );
1425                 } else {
1426                         $wgOut->setPageTitle( wfMsg( 'confirmprotect' ) );
1427                         $wgOut->setSubtitle( wfMsg( 'protectsub', $sub ) );
1428                         $wgOut->addWikiText( wfMsg( 'confirmprotecttext' ) );
1429                         $moveonly = htmlspecialchars( wfMsg( 'protectmoveonly' ) );
1430                         $protcom = htmlspecialchars( wfMsg( 'protectcomment' ) );
1431                         $formaction = $this->mTitle->escapeLocalURL( 'action=protect' . $par );
1432                 }
1433
1434                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1435                 $token = htmlspecialchars( $wgUser->editToken() );
1436
1437                 $wgOut->addHTML( "
1438 <form id='protectconfirm' method='post' action=\"{$formaction}\">
1439         <table border='0'>
1440                 <tr>
1441                         <td align='right'>
1442                                 <label for='wpReasonProtect'>{$protcom}:</label>
1443                         </td>
1444                         <td align='left'>
1445                                 <input type='text' size='60' name='wpReasonProtect' id='wpReasonProtect' value=\"" . htmlspecialchars( $reason ) . "\" />
1446                         </td>
1447                 </tr>" );
1448                 if($moveonly != '') {
1449                         $wgOut->AddHTML( "
1450                 <tr>
1451                         <td align='right'>
1452                                 <input type='checkbox' name='wpMoveOnly' value='1' id='wpMoveOnly' />
1453                         </td>
1454                         <td align='left'>
1455                                 <label for='wpMoveOnly'>{$moveonly}</label>
1456                         </td>
1457                 </tr> " );
1458                 }
1459                 $wgOut->addHTML( "
1460                 <tr>
1461                         <td>&nbsp;</td>
1462                         <td>
1463                                 <input type='submit' name='wpConfirmProtectB' value=\"{$confirm}\" />
1464                         </td>
1465                 </tr>
1466         </table>
1467         <input type='hidden' name='wpEditToken' value=\"{$token}\" />
1468 </form>" );
1469
1470                 $wgOut->returnToMain( false );
1471         }
1472
1473         /**
1474          * Unprotect the pages
1475          */
1476         function unprotect() {
1477                 return $this->protect( '' );
1478         }
1479
1480         /*
1481          * UI entry point for page deletion
1482          */
1483         function delete() {
1484                 global $wgUser, $wgOut, $wgMessageCache, $wgRequest;
1485                 $fname = 'Article::delete';
1486                 $confirm = $wgRequest->wasPosted() &&
1487                         $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
1488                 $reason = $wgRequest->getText( 'wpReason' );
1489
1490                 # This code desperately needs to be totally rewritten
1491
1492                 # Check permissions
1493                 if ( ( ! $wgUser->isAllowed('delete') ) ) {
1494                         $wgOut->sysopRequired();
1495                         return;
1496                 }
1497                 if ( wfReadOnly() ) {
1498                         $wgOut->readOnlyPage();
1499                         return;
1500                 }
1501
1502                 # Better double-check that it hasn't been deleted yet!
1503                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1504                 if ( ( '' == trim( $this->mTitle->getText() ) )
1505                   or ( $this->mTitle->getArticleId() == 0 ) ) {
1506                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1507                         return;
1508                 }
1509
1510                 if ( $confirm ) {
1511                         $this->doDelete( $reason );
1512                         return;
1513                 }
1514
1515                 # determine whether this page has earlier revisions
1516                 # and insert a warning if it does
1517                 # we select the text because it might be useful below
1518                 $dbr =& $this->getDB();
1519                 $ns = $this->mTitle->getNamespace();
1520                 $title = $this->mTitle->getDBkey();
1521                 $revisions = $dbr->select( array( 'page', 'revision' ),
1522                         array( 'rev_id' ),
1523                         array(
1524                                 'page_namespace' => $ns,
1525                                 'page_title' => $title,
1526                                 'rev_page = page_id'
1527                         ), $fname, $this->getSelectOptions( array( 'ORDER BY' => 'rev_timestamp DESC' ) )
1528                 );
1529
1530                 if( $dbr->numRows( $revisions ) > 1 && !$confirm ) {
1531                         $skin=$wgUser->getSkin();
1532                         $wgOut->addHTML('<b>'.wfMsg('historywarning'));
1533                         $wgOut->addHTML( $skin->historyLink() .'</b>');
1534                 }
1535
1536                 # Fetch cur_text
1537                 $s = $dbr->selectRow( array( 'page', 'text' ),
1538                         array( 'old_text' ),
1539                         array(
1540                                 'page_namespace' => $ns,
1541                                 'page_title' => $title,
1542                                 'page_latest = old_id'
1543                         ), $fname, $this->getSelectOptions()
1544                 );
1545
1546                 if( $s !== false ) {
1547                         # if this is a mini-text, we can paste part of it into the deletion reason
1548
1549                         #if this is empty, an earlier revision may contain "useful" text
1550                         $blanked = false;
1551                         if($s->old_text != '') {
1552                                 $text=$s->old_text;
1553                         } else {
1554                                 if($old) { # TODO
1555                                         $text = Revision::getRevisionText( $old );
1556                                         $blanked = true;
1557                                 }
1558
1559                         }
1560
1561                         $length=strlen($text);
1562
1563                         # this should not happen, since it is not possible to store an empty, new
1564                         # page. Let's insert a standard text in case it does, though
1565                         if($length == 0 && $reason === '') {
1566                                 $reason = wfMsg('exblank');
1567                         }
1568
1569                         if($length < 500 && $reason === '') {
1570
1571                                 # comment field=255, let's grep the first 150 to have some user
1572                                 # space left
1573                                 $text=substr($text,0,150);
1574                                 # let's strip out newlines and HTML tags
1575                                 $text=preg_replace('/\"/',"'",$text);
1576                                 $text=preg_replace('/\</','&lt;',$text);
1577                                 $text=preg_replace('/\>/','&gt;',$text);
1578                                 $text=preg_replace("/[\n\r]/",'',$text);
1579                                 if(!$blanked) {
1580                                         $reason=wfMsg('excontent'). " '".$text;
1581                                 } else {
1582                                         $reason=wfMsg('exbeforeblank') . " '".$text;
1583                                 }
1584                                 if($length>150) { $reason .= '...'; } # we've only pasted part of the text
1585                                 $reason.="'";
1586                         }
1587                 }
1588
1589                 return $this->confirmDelete( '', $reason );
1590         }
1591
1592         /**
1593          * Output deletion confirmation dialog
1594          */
1595         function confirmDelete( $par, $reason ) {
1596                 global $wgOut, $wgUser;
1597
1598                 wfDebug( "Article::confirmDelete\n" );
1599
1600                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1601                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1602                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1603                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1604
1605                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1606
1607                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1608                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1609                 $token = htmlspecialchars( $wgUser->editToken() );
1610
1611                 $wgOut->addHTML( "
1612 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1613         <table border='0'>
1614                 <tr>
1615                         <td align='right'>
1616                                 <label for='wpReason'>{$delcom}:</label>
1617                         </td>
1618                         <td align='left'>
1619                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1620                         </td>
1621                 </tr>
1622                 <tr>
1623                         <td>&nbsp;</td>
1624                         <td>
1625                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1626                         </td>
1627                 </tr>
1628         </table>
1629         <input type='hidden' name='wpEditToken' value=\"{$token}\" />
1630 </form>\n" );
1631
1632                 $wgOut->returnToMain( false );
1633         }
1634
1635
1636         /**
1637          * Perform a deletion and output success or failure messages
1638          */
1639         function doDelete( $reason ) {
1640                 global $wgOut, $wgUser, $wgContLang;
1641                 $fname = 'Article::doDelete';
1642                 wfDebug( $fname."\n" );
1643
1644                 if (wfRunHooks('ArticleDelete', array(&$this, &$wgUser, &$reason))) {
1645                         if ( $this->doDeleteArticle( $reason ) ) {
1646                                 $deleted = $this->mTitle->getPrefixedText();
1647
1648                                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1649                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1650
1651                                 $sk = $wgUser->getSkin();
1652                                 $loglink = $sk->makeKnownLink( $wgContLang->getNsText( NS_PROJECT ) .
1653                                                                                            ':' . wfMsgForContent( 'dellogpage' ),
1654                                                                                            wfMsg( 'deletionlog' ) );
1655
1656                                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
1657
1658                                 $wgOut->addHTML( '<p>' . $text . "</p>\n" );
1659                                 $wgOut->returnToMain( false );
1660                                 wfRunHooks('ArticleDeleteComplete', array(&$this, &$wgUser, $reason));
1661                         } else {
1662                                 $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1663                         }
1664                 }
1665         }
1666
1667         /**
1668          * Back-end article deletion
1669          * Deletes the article with database consistency, writes logs, purges caches
1670          * Returns success
1671          */
1672         function doDeleteArticle( $reason ) {
1673                 global $wgUser;
1674                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer, $wgPostCommitUpdateList;
1675
1676                 $fname = 'Article::doDeleteArticle';
1677                 wfDebug( $fname."\n" );
1678
1679                 $dbw =& wfGetDB( DB_MASTER );
1680                 $ns = $this->mTitle->getNamespace();
1681                 $t = $this->mTitle->getDBkey();
1682                 $id = $this->mTitle->getArticleID();
1683
1684                 if ( $t == '' || $id == 0 ) {
1685                         return false;
1686                 }
1687
1688                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
1689                 array_push( $wgDeferredUpdateList, $u );
1690
1691                 $linksTo = $this->mTitle->getLinksTo();
1692
1693                 # Squid purging
1694                 if ( $wgUseSquid ) {
1695                         $urls = array(
1696                                 $this->mTitle->getInternalURL(),
1697                                 $this->mTitle->getInternalURL( 'history' )
1698                         );
1699                         foreach ( $linksTo as $linkTo ) {
1700                                 $urls[] = $linkTo->getInternalURL();
1701                         }
1702
1703                         $u = new SquidUpdate( $urls );
1704                         array_push( $wgPostCommitUpdateList, $u );
1705
1706                 }
1707
1708                 # Client and file cache invalidation
1709                 Title::touchArray( $linksTo );
1710
1711                 # Move article and history to the "archive" table
1712
1713                 $dbw->insertSelect( 'archive', array( 'page','revision', 'text' ),
1714                         array(
1715                                 'ar_namespace'  => 'page_namespace',
1716                                 'ar_title'      => 'page_title',
1717                                 'ar_text'       => 'old_text',
1718                                 'ar_comment'    => 'rev_comment',
1719                                 'ar_user'       => 'rev_user',
1720                                 'ar_user_text'  => 'rev_user_text',
1721                                 'ar_timestamp'  => 'rev_timestamp',
1722                                 'ar_minor_edit' => 'rev_minor_edit',
1723                                 'ar_flags'      => 'old_flags',
1724                                 'ar_rev_id'     => 'rev_id',
1725                         ), array(
1726                                 'page_namespace' => $ns,
1727                                 'page_title' => $t,
1728                                 'page_id = rev_page AND old_id = rev_id'
1729                         ), $fname
1730                 );
1731
1732                 # Now that it's safely backed up, delete it
1733
1734                 $dbw->deleteJoin( 'text', 'revision', 'old_id', 'rev_id', array( "rev_page = {$id}" ), $fname );
1735                 $dbw->delete( 'revision', array( 'rev_page' => $id ), $fname );
1736                 $dbw->delete( 'page', array( 'page_id' => $id ), $fname);
1737
1738                 $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), $fname );
1739
1740                 # Finally, clean up the link tables
1741                 $t = $this->mTitle->getPrefixedDBkey();
1742
1743                 Article::onArticleDelete( $this->mTitle );
1744
1745                 # Insert broken links
1746                 $brokenLinks = array();
1747                 foreach ( $linksTo as $titleObj ) {
1748                         # Get article ID. Efficient because it was loaded into the cache by getLinksTo().
1749                         $linkID = $titleObj->getArticleID();
1750                         $brokenLinks[] = array( 'bl_from' => $linkID, 'bl_to' => $t );
1751                 }
1752                 $dbw->insert( 'brokenlinks', $brokenLinks, $fname, 'IGNORE' );
1753
1754                 # Delete live links
1755                 $dbw->delete( 'links', array( 'l_to' => $id ) );
1756                 $dbw->delete( 'links', array( 'l_from' => $id ) );
1757                 $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
1758                 $dbw->delete( 'brokenlinks', array( 'bl_from' => $id ) );
1759                 $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
1760
1761                 # Log the deletion
1762                 $log = new LogPage( 'delete' );
1763                 $log->addEntry( 'delete', $this->mTitle, $reason );
1764
1765                 # Clear the cached article id so the interface doesn't act like we exist
1766                 $this->mTitle->resetArticleID( 0 );
1767                 $this->mTitle->mArticleID = 0;
1768                 return true;
1769         }
1770
1771         /**
1772          * Revert a modification
1773          */
1774         function rollback() {
1775                 global $wgUser, $wgOut, $wgRequest;
1776                 $fname = 'Article::rollback';
1777
1778                 if ( ! $wgUser->isAllowed('rollback') ) {
1779                         $wgOut->sysopRequired();
1780                         return;
1781                 }
1782                 if ( wfReadOnly() ) {
1783                         $wgOut->readOnlyPage( $this->getContent( true ) );
1784                         return;
1785                 }
1786                 if( !$wgUser->matchEditToken( $wgRequest->getVal( 'token' ),
1787                         array( $this->mTitle->getPrefixedText(),
1788                                 $wgRequest->getVal( 'from' ) )  ) ) {
1789                         $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
1790                         $wgOut->addWikiText( wfMsg( 'sessionfailure' ) );
1791                         return;
1792                 }
1793                 $dbw =& wfGetDB( DB_MASTER );
1794
1795                 # Enhanced rollback, marks edits rc_bot=1
1796                 $bot = $wgRequest->getBool( 'bot' );
1797
1798                 # Replace all this user's current edits with the next one down
1799                 $tt = $this->mTitle->getDBKey();
1800                 $n = $this->mTitle->getNamespace();
1801
1802                 # Get the last editor, lock table exclusively
1803                 $dbw->begin();
1804                 $current = Revision::newFromTitle( $this->mTitle );
1805                 if( is_null( $current ) ) {
1806                         # Something wrong... no page?
1807                         $dbw->rollback();
1808                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
1809                         return;
1810                 }
1811
1812                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
1813                 if( $from != $current->getUserText() ) {
1814                         $wgOut->setPageTitle(wfmsg('rollbackfailed'));
1815                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
1816                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
1817                                 htmlspecialchars( $from ),
1818                                 htmlspecialchars( $current->getUserText() ) ) );
1819                         if( $current->getComment() != '') {
1820                                 $wgOut->addHTML(
1821                                         wfMsg( 'editcomment',
1822                                         htmlspecialchars( $current->getComment() ) ) );
1823                         }
1824                         return;
1825                 }
1826
1827                 # Get the last edit not by this guy
1828                 $user = IntVal( $current->getUser() );
1829                 $user_text = $dbw->addQuotes( $current->getUserText() );
1830                 $s = $dbw->selectRow( 'revision',
1831                         array( 'rev_id', 'rev_timestamp' ),
1832                         array(
1833                                 'rev_page' => $current->getPage(),
1834                                 "rev_user <> {$user} OR rev_user_text <> {$user_text}"
1835                         ), $fname,
1836                         array(
1837                                 'USE INDEX' => 'page_timestamp',
1838                                 'ORDER BY'  => 'rev_timestamp DESC' )
1839                         );
1840                 if( $s === false ) {
1841                         # Something wrong
1842                         $dbw->rollback();
1843                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
1844                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
1845                         return;
1846                 }
1847
1848                 if ( $bot ) {
1849                         # Mark all reverted edits as bot
1850                         $dbw->update( 'recentchanges',
1851                                 array( /* SET */
1852                                         'rc_bot' => 1
1853                                 ), array( /* WHERE */
1854                                         'rc_cur_id'    => $current->getPage(),
1855                                         'rc_user_text' => $current->getUserText(),
1856                                         "rc_timestamp > '{$s->rev_timestamp}'",
1857                                 ), $fname
1858                         );
1859                 }
1860
1861                 # Save it!
1862                 $target = Revision::newFromId( $s->rev_id );
1863                 $newcomment = wfMsg( 'revertpage', $target->getUserText(), $from );
1864
1865                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1866                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1867                 $wgOut->addHTML( '<h2>' . htmlspecialchars( $newcomment ) . "</h2>\n<hr />\n" );
1868
1869                 $this->updateArticle( $target->getText(), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1870                 Article::onArticleEdit( $this->mTitle );
1871
1872                 $dbw->commit();
1873                 $wgOut->returnToMain( false );
1874         }
1875
1876
1877         /**
1878          * Do standard deferred updates after page view
1879          * @private
1880          */
1881         function viewUpdates() {
1882                 global $wgDeferredUpdateList;
1883
1884                 if ( 0 != $this->getID() ) {
1885                         global $wgDisableCounters;
1886                         if( !$wgDisableCounters ) {
1887                                 Article::incViewCount( $this->getID() );
1888                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1889                                 array_push( $wgDeferredUpdateList, $u );
1890                         }
1891                 }
1892
1893                 # Update newtalk status if user is reading their own
1894                 # talk page
1895
1896                 global $wgUser;
1897                 if ($this->mTitle->getNamespace() == NS_USER_TALK &&
1898                         $this->mTitle->getText() == $wgUser->getName()) {
1899                         require_once( 'UserTalkUpdate.php' );
1900                         $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(), $this->mTitle->getDBkey(), false, false, false );
1901                 } else {
1902                         $wgUser->clearNotification( $this->mTitle );
1903                 }
1904
1905         }
1906
1907         /**
1908          * Do standard deferred updates after page edit.
1909          * Every 1000th edit, prune the recent changes table.
1910          * @private
1911          * @param string $text
1912          */
1913         function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange) {
1914                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1915                 global $wgMessageCache, $wgUser;
1916
1917                 wfSeedRandom();
1918                 if ( 0 == mt_rand( 0, 999 ) ) {
1919                         # Periodically flush old entries from the recentchanges table.
1920                         global $wgRCMaxAge;
1921                         $dbw =& wfGetDB( DB_MASTER );
1922                         $cutoff = $dbw->timestamp( time() - $wgRCMaxAge );
1923                         $recentchanges = $dbw->tableName( 'recentchanges' );
1924                         $sql = "DELETE FROM $recentchanges WHERE rc_timestamp < '{$cutoff}'";
1925                         $dbw->query( $sql );
1926                 }
1927                 $id = $this->getID();
1928                 $title = $this->mTitle->getPrefixedDBkey();
1929                 $shortTitle = $this->mTitle->getDBkey();
1930
1931                 $adj = $this->mCountAdjustment;
1932
1933                 if ( 0 != $id ) {
1934                         $u = new LinksUpdate( $id, $title );
1935                         array_push( $wgDeferredUpdateList, $u );
1936                         $u = new SiteStatsUpdate( 0, 1, $adj );
1937                         array_push( $wgDeferredUpdateList, $u );
1938                         $u = new SearchUpdate( $id, $title, $text );
1939                         array_push( $wgDeferredUpdateList, $u );
1940
1941                         # If this is another user's talk page,
1942                         # create a watchlist entry for this page
1943
1944                         if ($this->mTitle->getNamespace() == NS_USER_TALK &&
1945                                 $shortTitle != $wgUser->getName()) {
1946                                 require_once( 'UserTalkUpdate.php' );
1947                                 $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle, $summary, $minoredit, $timestamp_of_pagechange);
1948                         }
1949
1950                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1951                                 $wgMessageCache->replace( $shortTitle, $text );
1952                         }
1953                 }
1954         }
1955
1956         /**
1957          * @todo document this function
1958          * @private
1959          * @param string $oldid         Revision ID of this article revision
1960          */
1961         function setOldSubtitle( $oldid=0 ) {
1962                 global $wgLang, $wgOut, $wgUser;
1963
1964                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1965                 $sk = $wgUser->getSkin();
1966                 $lnk = $sk->makeKnownLinkObj ( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
1967                 $prevlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid );
1968                 $nextlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
1969                 $r = wfMsg( 'revisionasofwithlink', $td, $lnk, $prevlink, $nextlink );
1970                 $wgOut->setSubtitle( $r );
1971         }
1972
1973         /**
1974          * This function is called right before saving the wikitext,
1975          * so we can do things like signatures and links-in-context.
1976          *
1977          * @param string $text
1978          */
1979         function preSaveTransform( $text ) {
1980                 global $wgParser, $wgUser;
1981                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
1982         }
1983
1984         /* Caching functions */
1985
1986         /**
1987          * checkLastModified returns true if it has taken care of all
1988          * output to the client that is necessary for this request.
1989          * (that is, it has sent a cached version of the page)
1990          */
1991         function tryFileCache() {
1992                 static $called = false;
1993                 if( $called ) {
1994                         wfDebug( " tryFileCache() -- called twice!?\n" );
1995                         return;
1996                 }
1997                 $called = true;
1998                 if($this->isFileCacheable()) {
1999                         $touched = $this->mTouched;
2000                         $cache = new CacheManager( $this->mTitle );
2001                         if($cache->isFileCacheGood( $touched )) {
2002                                 global $wgOut;
2003                                 wfDebug( " tryFileCache() - about to load\n" );
2004                                 $cache->loadFromFileCache();
2005                                 return true;
2006                         } else {
2007                                 wfDebug( " tryFileCache() - starting buffer\n" );
2008                                 ob_start( array(&$cache, 'saveToFileCache' ) );
2009                         }
2010                 } else {
2011                         wfDebug( " tryFileCache() - not cacheable\n" );
2012                 }
2013         }
2014
2015         /**
2016          * Check if the page can be cached
2017          * @return bool
2018          */
2019         function isFileCacheable() {
2020                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
2021                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
2022
2023                 return $wgUseFileCache
2024                         and (!$wgShowIPinHeader)
2025                         and ($this->getID() != 0)
2026                         and ($wgUser->isAnon())
2027                         and (!$wgUser->getNewtalk())
2028                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
2029                         and (empty( $action ) || $action == 'view')
2030                         and (!isset($oldid))
2031                         and (!isset($diff))
2032                         and (!isset($redirect))
2033                         and (!isset($printable))
2034                         and (!$this->mRedirectedFrom);
2035         }
2036
2037         /**
2038          * Loads cur_touched and returns a value indicating if it should be used
2039          *
2040          */
2041         function checkTouched() {
2042                 $fname = 'Article::checkTouched';
2043                 if( !$this->mDataLoaded ) {
2044                         $dbr =& $this->getDB();
2045                         $data = $this->pageDataFromId( $dbr, $this->getId() );
2046                         if( $data ) {
2047                                 $this->loadPageData( $data );
2048                         }
2049                 }
2050                 return !$this->mIsRedirect;
2051         }
2052
2053         /**
2054          * Edit an article without doing all that other stuff
2055          * The article must already exist; link tables etc
2056          * are not updated, caches are not flushed.
2057          *
2058          * @param string $text text submitted
2059          * @param string $comment comment submitted
2060          * @param bool $minor whereas it's a minor modification
2061          */
2062         function quickEdit( $text, $comment = '', $minor = 0 ) {
2063                 $fname = 'Article::quickEdit';
2064                 wfProfileIn( $fname );
2065
2066                 $dbw =& wfGetDB( DB_MASTER );
2067                 $dbw->begin();
2068                 $revision = new Revision( array(
2069                         'page'       => $this->getId(),
2070                         'text'       => $text,
2071                         'comment'    => $comment,
2072                         'minor_edit' => $minor ? 1 : 0,
2073                         ) );
2074                 $revisionId = $revision->insertOn( $dbw );
2075                 $this->updateRevisionOn( $dbw, $revision );
2076                 $dbw->commit();
2077
2078                 wfProfileOut( $fname );
2079         }
2080
2081         /**
2082          * Used to increment the view counter
2083          *
2084          * @static
2085          * @param integer $id article id
2086          */
2087         function incViewCount( $id ) {
2088                 $id = intval( $id );
2089                 global $wgHitcounterUpdateFreq;
2090
2091                 $dbw =& wfGetDB( DB_MASTER );
2092                 $pageTable = $dbw->tableName( 'page' );
2093                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
2094                 $acchitsTable = $dbw->tableName( 'acchits' );
2095
2096                 if( $wgHitcounterUpdateFreq <= 1 ){ //
2097                         $dbw->query( "UPDATE $pageTable SET page_counter = page_counter + 1 WHERE page_id = $id" );
2098                         return;
2099                 }
2100
2101                 # Not important enough to warrant an error page in case of failure
2102                 $oldignore = $dbw->ignoreErrors( true );
2103
2104                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2105
2106                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2107                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2108                         # Most of the time (or on SQL errors), skip row count check
2109                         $dbw->ignoreErrors( $oldignore );
2110                         return;
2111                 }
2112
2113                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2114                 $row = $dbw->fetchObject( $res );
2115                 $rown = intval( $row->n );
2116                 if( $rown >= $wgHitcounterUpdateFreq ){
2117                         wfProfileIn( 'Article::incViewCount-collect' );
2118                         $old_user_abort = ignore_user_abort( true );
2119
2120                         $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2121                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable TYPE=HEAP ".
2122                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2123                                 'GROUP BY hc_id');
2124                         $dbw->query("DELETE FROM $hitcounterTable");
2125                         $dbw->query('UNLOCK TABLES');
2126                         $dbw->query("UPDATE $curTable,$acchitsTable SET cur_counter=cur_counter + hc_n ".
2127                                 'WHERE cur_id = hc_id');
2128                         $dbw->query("DROP TABLE $acchitsTable");
2129
2130                         ignore_user_abort( $old_user_abort );
2131                         wfProfileOut( 'Article::incViewCount-collect' );
2132                 }
2133                 $dbw->ignoreErrors( $oldignore );
2134         }
2135
2136         /**#@+
2137          * The onArticle*() functions are supposed to be a kind of hooks
2138          * which should be called whenever any of the specified actions
2139          * are done.
2140          *
2141          * This is a good place to put code to clear caches, for instance.
2142          *
2143          * This is called on page move and undelete, as well as edit
2144          * @static
2145          * @param $title_obj a title object
2146          */
2147
2148         function onArticleCreate($title_obj) {
2149                 global $wgUseSquid, $wgPostCommitUpdateList;
2150
2151                 $titles = $title_obj->getBrokenLinksTo();
2152
2153                 # Purge squid
2154                 if ( $wgUseSquid ) {
2155                         $urls = $title_obj->getSquidURLs();
2156                         foreach ( $titles as $linkTitle ) {
2157                                 $urls[] = $linkTitle->getInternalURL();
2158                         }
2159                         $u = new SquidUpdate( $urls );
2160                         array_push( $wgPostCommitUpdateList, $u );
2161                 }
2162
2163                 # Clear persistent link cache
2164                 LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
2165         }
2166
2167         function onArticleDelete($title_obj) {
2168                 LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
2169         }
2170         function onArticleEdit($title_obj) {
2171                 LinkCache::linksccClearPage( $title_obj->getArticleID() );
2172         }
2173         /**#@-*/
2174
2175         /**
2176          * Info about this page
2177          * Called for ?action=info when $wgAllowPageInfo is on.
2178          *
2179          * @access public
2180          */
2181         function info() {
2182                 global $wgLang, $wgOut, $wgAllowPageInfo;
2183                 $fname = 'Article::info';
2184
2185                 if ( !$wgAllowPageInfo ) {
2186                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
2187                         return;
2188                 }
2189
2190                 $page = $this->mTitle->getSubjectPage();
2191
2192                 $wgOut->setPagetitle( $page->getPrefixedText() );
2193                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
2194
2195                 # first, see if the page exists at all.
2196                 $exists = $page->getArticleId() != 0;
2197                 if( !$exists ) {
2198                         $wgOut->addHTML( wfMsg('noarticletext') );
2199                 } else {
2200                         $dbr =& $this->getDB( DB_SLAVE );
2201                         $wl_clause = array(
2202                                 'wl_title'     => $page->getDBkey(),
2203                                 'wl_namespace' => $page->getNamespace() );
2204                         $numwatchers = $dbr->selectField(
2205                                 'watchlist',
2206                                 'COUNT(*)',
2207                                 $wl_clause,
2208                                 $fname,
2209                                 $this->getSelectOptions() );
2210
2211                         $pageInfo = $this->pageCountInfo( $page );
2212                         $talkInfo = $this->pageCountInfo( $page->getTalkPage() );
2213
2214                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $wgLang->formatNum( $numwatchers ) ) . '</li>' );
2215                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $wgLang->formatNum( $pageInfo['edits'] ) ) . '</li>');
2216                         if( $talkInfo ) {
2217                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $wgLang->formatNum( $talkInfo['edits'] ) ) . '</li>');
2218                         }
2219                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $wgLang->formatNum( $pageInfo['authors'] ) ) . '</li>' );
2220                         if( $talkInfo ) {
2221                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $wgLang->formatNum( $talkInfo['authors'] ) ) . '</li>' );
2222                         }
2223                         $wgOut->addHTML( '</ul>' );
2224
2225                 }
2226         }
2227
2228         /**
2229          * Return the total number of edits and number of unique editors
2230          * on a given page. If page does not exist, returns false.
2231          *
2232          * @param Title $title
2233          * @return array
2234          * @access private
2235          */
2236         function pageCountInfo( $title ) {
2237                 $id = $title->getArticleId();
2238                 if( $id == 0 ) {
2239                         return false;
2240                 }
2241
2242                 $dbr =& $this->getDB( DB_SLAVE );
2243
2244                 $rev_clause = array( 'rev_page' => $id );
2245                 $fname = 'Article::pageCountInfo';
2246
2247                 $edits = $dbr->selectField(
2248                         'revision',
2249                         'COUNT(rev_page)',
2250                         $rev_clause,
2251                         $fname,
2252                         $this->getSelectOptions() );
2253
2254                 $authors = $dbr->selectField(
2255                         'revision',
2256                         'COUNT(DISTINCT rev_user_text)',
2257                         $rev_clause,
2258                         $fname,
2259                         $this->getSelectOptions() );
2260
2261                 return array( 'edits' => $edits, 'authors' => $authors );
2262         }
2263 }
2264
2265
2266 ?>