includes/Article.php

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