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