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