includes/Article.php

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