includes/Article.php

   1 <?php
   2 /**
   3  * File for articles
   4  * @package MediaWiki
   5  */
   6
   7 /**
   8  * Need the CacheManager to be loaded
   9  */
  10 require_once( 'CacheManager.php' );
  11 require_once( 'Revision.php' );
  12
  13 $wgArticleCurContentFields = false;
  14 $wgArticleOldContentFields = false;
  15
  16 /**
  17  * Class representing a MediaWiki article and history.
  18  *
  19  * See design.txt for an overview.
  20  * Note: edit user interface and cache support functions have been
  21  * moved to separate EditPage and CacheManager classes.
  22  *
  23  * @package MediaWiki
  24  */
  25 class Article {
  26         /**#@+
  27          * @access private
  28          */
  29         var $mContent, $mContentLoaded;
  30         var $mUser, $mTimestamp, $mUserText;
  31         var $mCounter, $mComment, $mGoodAdjustment, $mTotalAdjustment;
  32         var $mMinorEdit, $mRedirectedFrom;
  33         var $mTouched, $mFileCache, $mTitle;
  34         var $mId, $mTable;
  35         var $mForUpdate;
  36         var $mOldId;
  37         var $mRevIdFetched;
  38         /**#@-*/
  39
  40         /**
  41          * Constructor and clear the article
  42          * @param mixed &$title
  43          */
  44         function Article( &$title ) {
  45                 $this->mTitle =& $title;
  46                 $this->clear();
  47         }
  48
  49         /**
  50          * get the title object of the article
  51          * @public
  52          */
  53         function getTitle() {
  54                 return $this->mTitle;
  55         }
  56
  57         /**
  58           * Clear the object
  59           * @private
  60           */
  61         function clear() {
  62                 $this->mDataLoaded    = false;
  63                 $this->mContentLoaded = false;
  64
  65                 $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
  66                 $this->mRedirectedFrom = $this->mUserText =
  67                 $this->mTimestamp = $this->mComment = $this->mFileCache = '';
  68                 $this->mGoodAdjustment = $this->mTotalAdjustment = 0;
  69                 $this->mTouched = '19700101000000';
  70                 $this->mForUpdate = false;
  71                 $this->mIsRedirect = false;
  72                 $this->mRevIdFetched = 0;
  73         }
  74
  75         /**
  76          * Note that getContent/loadContent may follow redirects if
  77          * not told otherwise, and so may cause a change to mTitle.
  78          *
  79          * @param $noredir
  80          * @return Return the text of this revision
  81         */
  82         function getContent( $noredir ) {
  83                 global $wgRequest, $wgUser;
  84
  85                 # Get variables from query string :P
  86                 $action = $wgRequest->getText( 'action', 'view' );
  87                 $section = $wgRequest->getText( 'section' );
  88
  89                 $fname =  'Article::getContent';
  90                 wfProfileIn( $fname );
  91
  92                 if ( 0 == $this->getID() ) {
  93                         if ( 'edit' == $action ) {
  94                                 wfProfileOut( $fname );
  95                                 return ''; # was "newarticletext", now moved above the box)
  96                         }
  97                         wfProfileOut( $fname );
  98                         return wfMsg( 'noarticletext' );
  99                 } else {
 100                         $this->loadContent( $noredir );
 101                         # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 102                         if ( $this->mTitle->getNamespace() == NS_USER_TALK &&
 103                           $wgUser->isIP($this->mTitle->getText()) &&
 104                           $action=='view'
 105                         ) {
 106                                 wfProfileOut( $fname );
 107                                 return $this->mContent . "\n" .wfMsg('anontalkpagetext');
 108                         } else {
 109                                 if($action=='edit') {
 110                                         if($section!='') {
 111                                                 if($section=='new') {
 112                                                         wfProfileOut( $fname );
 113                                                         return '';
 114                                                 }
 115
 116                                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 117                                                 # comments to be stripped as well)
 118                                                 $rv=$this->getSection($this->mContent,$section);
 119                                                 wfProfileOut( $fname );
 120                                                 return $rv;
 121                                         }
 122                                 }
 123                                 wfProfileOut( $fname );
 124                                 return $this->mContent;
 125                         }
 126                 }
 127         }
 128
 129         /**
 130          * This function returns the text of a section, specified by a number ($section).
 131          * A section is text under a heading like == Heading == or <h1>Heading</h1>, or
 132          * the first section before any such heading (section 0).
 133          *
 134          * If a section contains subsections, these are also returned.
 135          *
 136          * @param string $text text to look in
 137          * @param integer $section section number
 138          * @return string text of the requested section
 139          */
 140         function getSection($text,$section) {
 141
 142                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 143                 # comments to be stripped as well)
 144                 $striparray=array();
 145                 $parser=new Parser();
 146                 $parser->mOutputType=OT_WIKI;
 147                 $striptext=$parser->strip($text, $striparray, true);
 148
 149                 # now that we can be sure that no pseudo-sections are in the source,
 150                 # split it up by section
 151                 $secs =
 152                   preg_split(
 153                   '/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 154                   $striptext, -1,
 155                   PREG_SPLIT_DELIM_CAPTURE);
 156                 if($section==0) {
 157                         $rv=$secs[0];
 158                 } else {
 159                         $headline=$secs[$section*2-1];
 160                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 161                         $hlevel=$matches[1];
 162
 163                         # translate wiki heading into level
 164                         if(strpos($hlevel,'=')!==false) {
 165                                 $hlevel=strlen($hlevel);
 166                         }
 167
 168                         $rv=$headline. $secs[$section*2];
 169                         $count=$section+1;
 170
 171                         $break=false;
 172                         while(!empty($secs[$count*2-1]) && !$break) {
 173
 174                                 $subheadline=$secs[$count*2-1];
 175                                 preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 176                                 $subhlevel=$matches[1];
 177                                 if(strpos($subhlevel,'=')!==false) {
 178                                         $subhlevel=strlen($subhlevel);
 179                                 }
 180                                 if($subhlevel > $hlevel) {
 181                                         $rv.=$subheadline.$secs[$count*2];
 182                                 }
 183                                 if($subhlevel <= $hlevel) {
 184                                         $break=true;
 185                                 }
 186                                 $count++;
 187
 188                         }
 189                 }
 190                 # reinsert stripped tags
 191                 $rv=$parser->unstrip($rv,$striparray);
 192                 $rv=$parser->unstripNoWiki($rv,$striparray);
 193                 $rv=trim($rv);
 194                 return $rv;
 195
 196         }
 197
 198         /**
 199          * Return an array of the columns of the "cur"-table
 200          */
 201         function getContentFields() {
 202                 return $wgArticleContentFields = array(
 203                   'old_text','old_flags',
 204                   'rev_timestamp','rev_user', 'rev_user_text', 'rev_comment','page_counter',
 205                   'page_namespace', 'page_title', 'page_restrictions','page_touched','page_is_redirect' );
 206         }
 207
 208         /**
 209          * Return the oldid of the article that is to be shown.
 210          * For requests with a "direction", this is not the oldid of the
 211          * query
 212          */
 213         function getOldID() {
 214                 global $wgRequest, $wgOut;
 215                 static $lastid;
 216
 217                 if ( isset( $lastid ) ) {
 218                         return $lastid;
 219                 }
 220                 # Query variables :P
 221                 $oldid = $wgRequest->getVal( 'oldid' );
 222                 if ( isset( $oldid ) ) {
 223                         $oldid = IntVal( $oldid );
 224                         if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 225                                 $nextid = $this->mTitle->getNextRevisionID( $oldid );
 226                                 if ( $nextid  ) {
 227                                         $oldid = $nextid;
 228                                 } else {
 229                                         $wgOut->redirect( $this->mTitle->getFullURL( 'redirect=no' ) );
 230                                 }
 231                         } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 232                                 $previd = $this->mTitle->getPreviousRevisionID( $oldid );
 233                                 if ( $previd ) {
 234                                         $oldid = $previd;
 235                                 } else {
 236                                         # TODO
 237                                 }
 238                         }
 239                         $lastid = $oldid;
 240                 }
 241                 return @$oldid; # "@" to be able to return "unset" without PHP complaining
 242         }
 243
 244
 245         /**
 246          * Load the revision (including cur_text) into this object
 247          */
 248         function loadContent( $noredir = false ) {
 249                 global $wgOut, $wgRequest;
 250
 251                 if ( $this->mContentLoaded ) return;
 252
 253                 # Query variables :P
 254                 $oldid = $this->getOldID();
 255                 $redirect = $wgRequest->getVal( 'redirect' );
 256
 257                 $fname = 'Article::loadContent';
 258
 259                 # Pre-fill content with error message so that if something
 260                 # fails we'll have something telling us what we intended.
 261
 262                 $t = $this->mTitle->getPrefixedText();
 263
 264                 $noredir = $noredir || ($wgRequest->getVal( 'redirect' ) == 'no')
 265                         || $wgRequest->getCheck( 'rdfrom' );
 266                 $this->mOldId = $oldid;
 267                 $this->fetchContent( $oldid, $noredir, true );
 268         }
 269
 270
 271         /**
 272          * Fetch a page record with the given conditions
 273          * @param Database $dbr
 274          * @param array    $conditions
 275          * @access private
 276          */
 277         function pageData( &$dbr, $conditions ) {
 278                 return $dbr->selectRow( 'page',
 279                         array(
 280                                 'page_id',
 281                                 'page_namespace',
 282                                 'page_title',
 283                                 'page_restrictions',
 284                                 'page_counter',
 285                                 'page_is_redirect',
 286                                 'page_is_new',
 287                                 'page_random',
 288                                 'page_touched',
 289                                 'page_latest',
 290                                 'page_len' ),
 291                         $conditions,
 292                         'Article::pageData' );
 293         }
 294
 295         function pageDataFromTitle( &$dbr, $title ) {
 296                 return $this->pageData( $dbr, array(
 297                         'page_namespace' => $title->getNamespace(),
 298                         'page_title'     => $title->getDBkey() ) );
 299         }
 300
 301         function pageDataFromId( &$dbr, $id ) {
 302                 return $this->pageData( $dbr, array(
 303                         'page_id' => IntVal( $id ) ) );
 304         }
 305
 306         /**
 307          * Set the general counter, title etc data loaded from
 308          * some source.
 309          *
 310          * @param object $data
 311          * @access private
 312          */
 313         function loadPageData( $data ) {
 314                 $this->mTitle->mRestrictions = explode( ',', trim( $data->page_restrictions ) );
 315                 $this->mTitle->mRestrictionsLoaded = true;
 316
 317                 $this->mCounter    = $data->page_counter;
 318                 $this->mTouched    = wfTimestamp( TS_MW, $data->page_touched );
 319                 $this->mIsRedirect = $data->page_is_redirect;
 320                 $this->mLatest     = $data->page_latest;
 321
 322                 $this->mDataLoaded = true;
 323         }
 324
 325         /**
 326          * Get text of an article from database
 327          * @param int $oldid 0 for whatever the latest revision is
 328          * @param bool $noredir Set to true to avoid following redirects
 329          * @param bool $globalTitle Set to true to change the global $wgTitle object when following redirects or other unexpected title changes
 330          * @return string
 331          */
 332         function fetchContent( $oldid = 0, $noredir = false, $globalTitle = false ) {
 333                 if ( $this->mContentLoaded ) {
 334                         return $this->mContent;
 335                 }
 336                 $dbr =& $this->getDB();
 337                 $fname = 'Article::fetchContent';
 338
 339                 # Pre-fill content with error message so that if something
 340                 # fails we'll have something telling us what we intended.
 341                 $t = $this->mTitle->getPrefixedText();
 342                 if( $oldid ) {
 343                         $t .= ',oldid='.$oldid;
 344                 }
 345                 if( isset( $redirect ) ) {
 346                         $redirect = ($redirect == 'no') ? 'no' : 'yes';
 347                         $t .= ',redirect='.$redirect;
 348                 }
 349                 $this->mContent = wfMsg( 'missingarticle', $t );
 350
 351                 if( $oldid ) {
 352                         $revision = Revision::newFromId( $oldid );
 353                         if( is_null( $revision ) ) {
 354                                 wfDebug( "$fname failed to retrieve specified revision, id $oldid\n" );
 355                                 return false;
 356                         }
 357                         $data = $this->pageDataFromId( $dbr, $revision->getPage() );
 358                         if( !$data ) {
 359                                 wfDebug( "$fname failed to get page data linked to revision id $oldid\n" );
 360                                 return false;
 361                         }
 362                         $this->mTitle = Title::makeTitle( $data->page_namespace, $data->page_title );
 363                         $this->loadPageData( $data );
 364                 } else {
 365                         if( !$this->mDataLoaded ) {
 366                                 $data = $this->pageDataFromTitle( $dbr, $this->mTitle );
 367                                 if( !$data ) {
 368                                         wfDebug( "$fname failed to find page data for title " . $this->mTitle->getPrefixedText() . "\n" );
 369                                         return false;
 370                                 }
 371                                 $this->loadPageData( $data );
 372                         }
 373                         $revision = Revision::newFromId( $this->mLatest );
 374                         if( is_null( $revision ) ) {
 375                                 wfDebug( "$fname failed to retrieve current page, rev_id $data->page_latest\n" );
 376                                 return false;
 377                         }
 378                 }
 379
 380                 # If we got a redirect, follow it (unless we've been told
 381                 # not to by either the function parameter or the query
 382                 if ( !$oldid && !$noredir ) {
 383                         $rt = Title::newFromRedirect( $revision->getText() );
 384                         # process if title object is valid and not special:userlogout
 385                         if ( $rt && ! ( $rt->getNamespace() == NS_SPECIAL && $rt->getText() == 'Userlogout' ) ) {
 386                                 # Gotta hand redirects to special pages differently:
 387                                 # Fill the HTTP response "Location" header and ignore
 388                                 # the rest of the page we're on.
 389                                 global $wgDisableHardRedirects;
 390                                 if( $globalTitle && !$wgDisableHardRedirects ) {
 391                                         global $wgOut;
 392                                         if ( $rt->getInterwiki() != '' && $rt->isLocal() ) {
 393                                                 $source = $this->mTitle->getFullURL( 'redirect=no' );
 394                                                 $wgOut->redirect( $rt->getFullURL( 'rdfrom=' . urlencode( $source ) ) ) ;
 395                                                 return false;
 396                                         }
 397                                         if ( $rt->getNamespace() == NS_SPECIAL ) {
 398                                                 $wgOut->redirect( $rt->getFullURL() );
 399                                                 return false;
 400                                         }
 401                                 }
 402                                 $redirData = $this->pageDataFromTitle( $dbr, $rt );
 403                                 if( $redirData ) {
 404                                         $redirRev = Revision::newFromId( $redirData->page_latest );
 405                                         if( !is_null( $redirRev ) ) {
 406                                                 $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 407                                                 $this->mTitle = $rt;
 408                                                 $data = $redirData;
 409                                                 $this->loadPageData( $data );
 410                                                 $revision = $redirRev;
 411                                         }
 412                                 }
 413                         }
 414                 }
 415
 416                 # if the title's different from expected, update...
 417                 if( $globalTitle ) {
 418                         global $wgTitle;
 419                         if( !$this->mTitle->equals( $wgTitle ) ) {
 420                                 $wgTitle = $this->mTitle;
 421                         }
 422                 }
 423
 424                 # Back to the business at hand...
 425                 $this->mContent   = $revision->getText();
 426
 427                 $this->mUser      = $revision->getUser();
 428                 $this->mUserText  = $revision->getUserText();
 429                 $this->mComment   = $revision->getComment();
 430                 $this->mTimestamp = wfTimestamp( TS_MW, $revision->getTimestamp() );
 431
 432                 $this->mRevIdFetched = $revision->getID();
 433                 $this->mContentLoaded = true;
 434
 435                 return $this->mContent;
 436         }
 437
 438         /**
 439          * Gets the article text without using so many damn globals
 440          * Returns false on error
 441          *
 442          * @param integer $oldid
 443          */
 444         function getContentWithoutUsingSoManyDamnGlobals( $oldid = 0, $noredir = false ) {
 445                 return $this->fetchContent( $oldid, $noredir, false );
 446         }
 447
 448         /**
 449          * Read/write accessor to select FOR UPDATE
 450          */
 451         function forUpdate( $x = NULL ) {
 452                 return wfSetVar( $this->mForUpdate, $x );
 453         }
 454
 455         /**
 456          * Get the database which should be used for reads
 457          */
 458         function &getDB() {
 459                 #if ( $this->mForUpdate ) {
 460                         return wfGetDB( DB_MASTER );
 461                 #} else {
 462                 #       return wfGetDB( DB_SLAVE );
 463                 #}
 464         }
 465
 466         /**
 467          * Get options for all SELECT statements
 468          * Can pass an option array, to which the class-wide options will be appended
 469          */
 470         function getSelectOptions( $options = '' ) {
 471                 if ( $this->mForUpdate ) {
 472                         if ( is_array( $options ) ) {
 473                                 $options[] = 'FOR UPDATE';
 474                         } else {
 475                                 $options = 'FOR UPDATE';
 476                         }
 477                 }
 478                 return $options;
 479         }
 480
 481         /**
 482          * Return the Article ID
 483          */
 484         function getID() {
 485                 if( $this->mTitle ) {
 486                         return $this->mTitle->getArticleID();
 487                 } else {
 488                         return 0;
 489                 }
 490         }
 491
 492         /**
 493          * Get the view count for this article
 494          */
 495         function getCount() {
 496                 if ( -1 == $this->mCounter ) {
 497                         $id = $this->getID();
 498                         $dbr =& $this->getDB();
 499                         $this->mCounter = $dbr->selectField( 'page', 'page_counter', array( 'page_id' => $id ),
 500                                 'Article::getCount', $this->getSelectOptions() );
 501                 }
 502                 return $this->mCounter;
 503         }
 504
 505         /**
 506          * Would the given text make this article a "good" article (i.e.,
 507          * suitable for including in the article count)?
 508          * @param string $text Text to analyze
 509          * @return integer 1 if it can be counted else 0
 510          */
 511         function isCountable( $text ) {
 512                 global $wgUseCommaCount;
 513
 514                 if ( NS_MAIN != $this->mTitle->getNamespace() ) { return 0; }
 515                 if ( $this->isRedirect( $text ) ) { return 0; }
 516                 $token = ($wgUseCommaCount ? ',' : '[[' );
 517                 if ( false === strstr( $text, $token ) ) { return 0; }
 518                 return 1;
 519         }
 520
 521         /**
 522          * Tests if the article text represents a redirect
 523          */
 524         function isRedirect( $text = false ) {
 525                 if ( $text === false ) {
 526                         $this->loadContent();
 527                         $titleObj = Title::newFromRedirect( $this->fetchRevisionText() );
 528                 } else {
 529                         $titleObj = Title::newFromRedirect( $text );
 530                 }
 531                 return $titleObj !== NULL;
 532         }
 533
 534         /**
 535          * Loads everything except the text
 536          * This isn't necessary for all uses, so it's only done if needed.
 537          * @private
 538          */
 539         function loadLastEdit() {
 540                 global $wgOut;
 541
 542                 if ( -1 != $this->mUser )
 543                         return;
 544
 545                 # New or non-existent articles have no user information
 546                 $id = $this->getID();
 547                 if ( 0 == $id ) return;
 548
 549                 $this->mLastRevision = Revision::loadFromPageId( $this->getDB(), $id );
 550                 if( !is_null( $this->mLastRevision ) ) {
 551                         $this->mUser      = $this->mLastRevision->getUser();
 552                         $this->mUserText  = $this->mLastRevision->getUserText();
 553                         $this->mTimestamp = $this->mLastRevision->getTimestamp();
 554                         $this->mComment   = $this->mLastRevision->getComment();
 555                         $this->mMinorEdit = $this->mLastRevision->isMinor();
 556                 }
 557         }
 558
 559         function getTimestamp() {
 560                 $this->loadLastEdit();
 561                 return $this->mTimestamp;
 562         }
 563
 564         function getUser() {
 565                 $this->loadLastEdit();
 566                 return $this->mUser;
 567         }
 568
 569         function getUserText() {
 570                 $this->loadLastEdit();
 571                 return $this->mUserText;
 572         }
 573
 574         function getComment() {
 575                 $this->loadLastEdit();
 576                 return $this->mComment;
 577         }
 578
 579         function getMinorEdit() {
 580                 $this->loadLastEdit();
 581                 return $this->mMinorEdit;
 582         }
 583
 584         function getRevIdFetched() {
 585                 $this->loadLastEdit();
 586                 return $this->mRevIdFetched;
 587         }
 588
 589         function getContributors($limit = 0, $offset = 0) {
 590                 $fname = 'Article::getContributors';
 591
 592                 # XXX: this is expensive; cache this info somewhere.
 593
 594                 $title = $this->mTitle;
 595                 $contribs = array();
 596                 $dbr =& $this->getDB();
 597                 $revTable = $dbr->tableName( 'revision' );
 598                 $userTable = $dbr->tableName( 'user' );
 599                 $encDBkey = $dbr->addQuotes( $title->getDBkey() );
 600                 $ns = $title->getNamespace();
 601                 $user = $this->getUser();
 602                 $pageId = $this->getId();
 603
 604                 $sql = "SELECT rev_user, rev_user_text, user_real_name, MAX(rev_timestamp) as timestamp
 605                         FROM $revTable LEFT JOIN $userTable ON rev_user = user_id
 606                         WHERE rev_page = $pageId
 607                         AND rev_user != $user
 608                         GROUP BY rev_user, rev_user_text, user_real_name
 609                         ORDER BY timestamp DESC";
 610
 611                 if ($limit > 0) { $sql .= ' LIMIT '.$limit; }
 612                 $sql .= ' '. $this->getSelectOptions();
 613
 614                 $res = $dbr->query($sql, $fname);
 615
 616                 while ( $line = $dbr->fetchObject( $res ) ) {
 617                         $contribs[] = array($line->rev_user, $line->rev_user_text, $line->user_real_name);
 618                 }
 619
 620                 $dbr->freeResult($res);
 621                 return $contribs;
 622         }
 623
 624         /**
 625          * This is the default action of the script: just view the page of
 626          * the given title.
 627         */
 628         function view() {
 629                 global $wgUser, $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgLang;
 630                 global $wgLinkCache, $IP, $wgEnableParserCache, $wgStylePath, $wgUseRCPatrol;
 631                 global $wgEnotif, $wgParser;
 632                 $sk = $wgUser->getSkin();
 633
 634                 $fname = 'Article::view';
 635                 wfProfileIn( $fname );
 636                 # Get variables from query string
 637                 $oldid = $this->getOldID();
 638                 $diff = $wgRequest->getVal( 'diff' );
 639                 $rcid = $wgRequest->getVal( 'rcid' );
 640                 $rdfrom = $wgRequest->getVal( 'rdfrom' );
 641
 642                 $wgOut->setArticleFlag( true );
 643                 $wgOut->setRobotpolicy( 'index,follow' );
 644                 # If we got diff and oldid in the query, we want to see a
 645                 # diff page instead of the article.
 646
 647                 if ( !is_null( $diff ) ) {
 648                         require_once( 'DifferenceEngine.php' );
 649                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 650
 651                         $de = new DifferenceEngine( $oldid, $diff, $rcid );
 652                         // DifferenceEngine directly fetched the revision:
 653                         $this->mRevIdFetched = $de->mNewid;
 654                         $de->showDiffPage();
 655
 656                         if( $diff == 0 ) {
 657                                 # Run view updates for current revision only
 658                                 $this->viewUpdates();
 659                         }
 660                         wfProfileOut( $fname );
 661                         return;
 662                 }
 663                 if ( empty( $oldid ) && $this->checkTouched() ) {
 664                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 665                                 wfProfileOut( $fname );
 666                                 return;
 667                         } else if ( $this->tryFileCache() ) {
 668                                 # tell wgOut that output is taken care of
 669                                 $wgOut->disable();
 670                                 $this->viewUpdates();
 671                                 wfProfileOut( $fname );
 672                                 return;
 673                         }
 674                 }
 675                 # Should the parser cache be used?
 676                 if ( $wgEnableParserCache && intval($wgUser->getOption( 'stubthreshold' )) == 0 && empty( $oldid ) && $this->getID() ) {
 677                         $pcache = true;
 678                 } else {
 679                         $pcache = false;
 680                 }
 681
 682                 $outputDone = false;
 683                 if ( $pcache ) {
 684                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 685                                 $outputDone = true;
 686                         }
 687                 }
 688                 if ( !$outputDone ) {
 689                         $text = $this->getContent( false ); # May change mTitle by following a redirect
 690
 691                         # Another whitelist check in case oldid or redirects are altering the title
 692                         if ( !$this->mTitle->userCanRead() ) {
 693                                 $wgOut->loginToUse();
 694                                 $wgOut->output();
 695                                 exit;
 696                         }
 697
 698
 699                         # We're looking at an old revision
 700
 701                         if ( !empty( $oldid ) ) {
 702                                 $this->setOldSubtitle( isset($this->mOldId) ? $this->mOldId : $oldid );
 703                                 $wgOut->setRobotpolicy( 'noindex,follow' );
 704                         }
 705                         if ( '' != $this->mRedirectedFrom ) {
 706                                 $sk = $wgUser->getSkin();
 707                                 $redir = $sk->makeKnownLink( $this->mRedirectedFrom, '',
 708                                   'redirect=no' );
 709                                 $s = wfMsg( 'redirectedfrom', $redir );
 710                                 $wgOut->setSubtitle( $s );
 711
 712                                 # Can't cache redirects
 713                                 $pcache = false;
 714                         } elseif ( !empty( $rdfrom ) ) {
 715                                 global $wgRedirectSources;
 716                                 if( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 717                                         $sk = $wgUser->getSkin();
 718                                         $redir = $sk->makeExternalLink( $rdfrom, $rdfrom );
 719                                         $s = wfMsg( 'redirectedfrom', $redir );
 720                                         $wgOut->setSubtitle( $s );
 721                                 }
 722                         }
 723
 724                         # wrap user css and user js in pre and don't parse
 725                         # XXX: use $this->mTitle->usCssJsSubpage() when php is fixed/ a workaround is found
 726                         if (
 727                                 $this->mTitle->getNamespace() == NS_USER &&
 728                                 preg_match('/\\/[\\w]+\\.(css|js)$/', $this->mTitle->getDBkey())
 729                         ) {
 730                                 $wgOut->addWikiText( wfMsg('clearyourcache'));
 731                                 $wgOut->addHTML( '<pre>'.htmlspecialchars($this->mContent)."\n</pre>" );
 732                         } else if ( $rt = Title::newFromRedirect( $text ) ) {
 733                                 # Display redirect
 734                                 $imageUrl = $wgStylePath.'/common/images/redirect.png';
 735                                 $targetUrl = $rt->escapeLocalURL();
 736                                 $titleText = htmlspecialchars( $rt->getPrefixedText() );
 737                                 $link = $sk->makeLinkObj( $rt );
 738
 739                                 $wgOut->addHTML( '<img valign="center" src="'.$imageUrl.'" alt="#REDIRECT" />' .
 740                                   '<span class="redirectText">'.$link.'</span>' );
 741
 742                                 $parseout = $wgParser->parse($text, $this->mTitle, ParserOptions::newFromUser($wgUser));
 743                                 $catlinks = $parseout->getCategoryLinks();
 744                                 $wgOut->addCategoryLinks($catlinks);
 745                                 $skin = $wgUser->getSkin();
 746                         } else if ( $pcache ) {
 747                                 # Display content and save to parser cache
 748                                 $wgOut->addPrimaryWikiText( $text, $this );
 749                         } else {
 750                                 # Display content, don't attempt to save to parser cache
 751                                 $wgOut->addWikiText( $text );
 752                         }
 753                 }
 754                 /* title may have been set from the cache */
 755                 $t = $wgOut->getPageTitle();
 756                 if( empty( $t ) ) {
 757                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 758                 }
 759
 760                 # If we have been passed an &rcid= parameter, we want to give the user a
 761                 # chance to mark this new article as patrolled.
 762                 if ( $wgUseRCPatrol
 763                         && !is_null($rcid)
 764                         && $rcid != 0
 765                         && $wgUser->isLoggedIn()
 766                         && ( $wgUser->isAllowed('patrol') || !$wgOnlySysopsCanPatrol ) )
 767                 {
 768                         $wgOut->addHTML(
 769                                 "<div class='patrollink'>" .
 770                                         wfMsg ( 'markaspatrolledlink',
 771                                         $sk->makeKnownLinkObj( $this->mTitle, wfMsg('markaspatrolledtext'), "action=markpatrolled&rcid=$rcid" )
 772                                         ) .
 773                                 '</div>'
 774                          );
 775                 }
 776
 777                 # Put link titles into the link cache
 778                 $wgOut->transformBuffer();
 779
 780                 # Add link titles as META keywords
 781                 $wgOut->addMetaTags() ;
 782
 783                 $this->viewUpdates();
 784                 wfProfileOut( $fname );
 785         }
 786
 787         /**
 788          * Insert a new empty page record for this article.
 789          * This *must* be followed up by creating a revision
 790          * and running $this->updateToLatest( $rev_id );
 791          * or else the record will be left in a funky state.
 792          * Best if all done inside a transaction.
 793          *
 794          * @param Database $dbw
 795          * @param string   $restrictions
 796          * @return int     The newly created page_id key
 797          * @access private
 798          */
 799         function insertOn( &$dbw, $restrictions = '' ) {
 800                 $fname = 'Article::insertOn';
 801                 wfProfileIn( $fname );
 802
 803                 $page_id = $dbw->nextSequenceValue( 'page_page_id_seq' );
 804                 $dbw->insert( 'page', array(
 805                         'page_id'           => $page_id,
 806                         'page_namespace'    => $this->mTitle->getNamespace(),
 807                         'page_title'        => $this->mTitle->getDBkey(),
 808                         'page_counter'      => 0,
 809                         'page_restrictions' => $restrictions,
 810                         'page_is_redirect'  => 0, # Will set this shortly...
 811                         'page_is_new'       => 1,
 812                         'page_random'       => wfRandom(),
 813                         'page_touched'      => $dbw->timestamp(),
 814                         'page_latest'       => 0, # Fill this in shortly...
 815                 ), $fname );
 816                 $newid = $dbw->insertId();
 817
 818                 $this->mTitle->resetArticleId( $newid );
 819
 820                 wfProfileOut( $fname );
 821                 return $newid;
 822         }
 823
 824         /**
 825          * Update the page record to point to a newly saved revision.
 826          *
 827          * @param Database $dbw
 828          * @param Revision $revision -- for ID number, and text used to set
 829                                         length and redirect status fields
 830          * @param int $lastRevision -- if given, will not overwrite the page field
 831          *                             when different from the currently set value.
 832          *                             Giving 0 indicates the new page flag should
 833          *                             be set on.
 834          * @return bool true on success, false on failure
 835          * @access private
 836          */
 837         function updateRevisionOn( &$dbw, $revision, $lastRevision = null ) {
 838                 $fname = 'Article::updateToRevision';
 839                 wfProfileIn( $fname );
 840
 841                 $conditions = array( 'page_id' => $this->getId() );
 842                 if( !is_null( $lastRevision ) ) {
 843                         # An extra check against threads stepping on each other
 844                         $conditions['page_latest'] = $lastRevision;
 845                 }
 846                 $text = $revision->getText();
 847                 $dbw->update( 'page',
 848                         array( /* SET */
 849                                 'page_latest'      => $revision->getId(),
 850                                 'page_touched'     => $dbw->timestamp(),
 851                                 'page_is_new'      => ($lastRevision === 0) ? 1 : 0,
 852                                 'page_is_redirect' => Article::isRedirect( $text ),
 853                                 'page_len'         => strlen( $text ),
 854                         ),
 855                         $conditions,
 856                         $fname );
 857
 858                 wfProfileOut( $fname );
 859                 return ( $dbw->affectedRows() != 0 );
 860         }
 861
 862         /**
 863          * If the given revision is newer than the currently set page_latest,
 864          * update the page record. Otherwise, do nothing.
 865          *
 866          * @param Database $dbw
 867          * @param Revision $revision
 868          */
 869         function updateIfNewerOn( &$dbw, $revision ) {
 870                 $fname = 'Article::updateIfNewerOn';
 871                 wfProfileIn( $fname );
 872
 873                 $row = $dbw->selectRow(
 874                         array( 'revision', 'page' ),
 875                         array( 'rev_id', 'rev_timestamp' ),
 876                         array(
 877                                 'page_id' => $this->getId(),
 878                                 'page_latest=rev_id' ),
 879                         $fname );
 880                 if( $row ) {
 881                         if( $row->rev_timestamp >= $revision->getTimestamp() ) {
 882                                 wfProfileOut( $fname );
 883                                 return false;
 884                         }
 885                         $prev = $row->rev_id;
 886                 } else {
 887                         # No or missing previous revision; mark the page as new
 888                         $prev = 0;
 889                 }
 890
 891                 $ret = $this->updateRevisionOn( $dbw, $revision, $prev );
 892                 wfProfileOut( $fname );
 893                 return $ret;
 894         }
 895
 896         /**
 897          * Theoretically we could defer these whole insert and update
 898          * functions for after display, but that's taking a big leap
 899          * of faith, and we want to be able to report database
 900          * errors at some point.
 901          * @private
 902          */
 903         function insertNewArticle( $text, $summary, $isminor, $watchthis, $suppressRC=false ) {
 904                 global $wgOut, $wgUser;
 905                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 906
 907                 $fname = 'Article::insertNewArticle';
 908
 909                 $this->mGoodAdjustment = $this->isCountable( $text );
 910                 $this->mTotalAdjustment = 1;
 911
 912                 $ns = $this->mTitle->getNamespace();
 913                 $ttl = $this->mTitle->getDBkey();
 914                 $text = $this->preSaveTransform( $text );
 915                 $isminor = ( $isminor && $wgUser->isLoggedIn() ) ? 1 : 0;
 916                 $now = wfTimestampNow();
 917
 918                 $dbw =& wfGetDB( DB_MASTER );
 919
 920                 # Add the page record; stake our claim on this title!
 921                 $newid = $this->insertOn( $dbw );
 922
 923                 # Save the revision text...
 924                 $revision = new Revision( array(
 925                         'page'       => $newid,
 926                         'comment'    => $summary,
 927                         'minor_edit' => $isminor,
 928                         'text'       => $text
 929                         ) );
 930                 $revisionId = $revision->insertOn( $dbw );
 931
 932                 $this->mTitle->resetArticleID( $newid );
 933
 934                 # Update the page record with revision data
 935                 $this->updateRevisionOn( $dbw, $revision, 0 );
 936
 937                 Article::onArticleCreate( $this->mTitle );
 938                 if(!$suppressRC) {
 939                         RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary );
 940                 }
 941
 942                 if ($watchthis) {
 943                         if(!$this->mTitle->userIsWatching()) $this->watch();
 944                 } else {
 945                         if ( $this->mTitle->userIsWatching() ) {
 946                                 $this->unwatch();
 947                         }
 948                 }
 949
 950                 # The talk page isn't in the regular link tables, so we need to update manually:
 951                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 952                 $dbw->update( 'page',
 953                         array( 'page_touched' => $dbw->timestamp($now) ),
 954                         array( 'page_namespace' => $talkns,
 955                                'page_title' => $ttl ),
 956                         $fname );
 957
 958                 # standard deferred updates
 959                 $this->editUpdates( $text, $summary, $isminor, $now );
 960
 961                 $oldid = 0; # new article
 962                 $this->showArticle( $text, wfMsg( 'newarticle' ), false, $isminor, $now, $summary, $oldid );
 963         }
 964
 965         /**
 966          * Fetch and uncompress the text for a given revision.
 967          * Can ask by rev_id number or timestamp (set $field)
 968          * FIXME: This function is broken. Eliminate all uses and remove.
 969          * Use Revision class in place.
 970          */
 971         function fetchRevisionText( $revId = null, $field = 'rev_id' ) {
 972                 $fname = 'Article::fetchRevisionText';
 973                 $dbw =& wfGetDB( DB_MASTER );
 974                 if( $revId ) {
 975                         $rev = $dbw->addQuotes( $revId );
 976                 } else {
 977                         $rev = 'page_latest';
 978                 }
 979                 $result = $dbw->query(
 980                         sprintf( "SELECT old_text, old_flags
 981                                 FROM %s,%s,%s
 982                                 WHERE old_id=rev_id AND rev_page=page_id AND page_id=%d
 983                                 AND %s=%s",
 984                                 $dbw->tableName( 'page' ),
 985                                 $dbw->tableName( 'revision' ),
 986                                 $dbw->tableName( 'text' ),
 987                                 IntVal( $this->mTitle->getArticleId() ),
 988                                 $field,
 989                                 $rev ),
 990                         $fname );
 991                 $obj = $dbw->fetchObject( $result );
 992                 $dbw->freeResult( $result );
 993                 $oldtext = Revision::getRevisionText( $obj );
 994                 return $oldtext;
 995         }
 996
 997         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = '', $edittime = NULL) {
 998                 $fname = 'Article::getTextOfLastEditWithSectionReplacedOrAdded';
 999                 if ($section != '') {
1000                         if( is_null( $edittime ) ) {
1001                                 $rev = Revision::newFromTitle( $this->mTitle );
1002                         } else {
1003                                 $dbw =& wfGetDB( DB_MASTER );
1004                                 $rev = Revision::loadFromTimestamp( $dbw, $this->mTitle, $edittime );
1005                         }
1006                         $oldtext = $rev->getText();
1007
1008                         if($section=='new') {
1009                                 if($summary) $subject="== {$summary} ==\n\n";
1010                                 $text=$oldtext."\n\n".$subject.$text;
1011                         } else {
1012
1013                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
1014                                 # comments to be stripped as well)
1015                                 $striparray=array();
1016                                 $parser=new Parser();
1017                                 $parser->mOutputType=OT_WIKI;
1018                                 $oldtext=$parser->strip($oldtext, $striparray, true);
1019
1020                                 # now that we can be sure that no pseudo-sections are in the source,
1021                                 # split it up
1022                                 # Unfortunately we can't simply do a preg_replace because that might
1023                                 # replace the wrong section, so we have to use the section counter instead
1024                                 $secs=preg_split('/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
1025                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
1026                                 $secs[$section*2]=$text."\n\n"; // replace with edited
1027
1028                                 # section 0 is top (intro) section
1029                                 if($section!=0) {
1030
1031                                         # headline of old section - we need to go through this section
1032                                         # to determine if there are any subsections that now need to
1033                                         # be erased, as the mother section has been replaced with
1034                                         # the text of all subsections.
1035                                         $headline=$secs[$section*2-1];
1036                                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
1037                                         $hlevel=$matches[1];
1038
1039                                         # determine headline level for wikimarkup headings
1040                                         if(strpos($hlevel,'=')!==false) {
1041                                                 $hlevel=strlen($hlevel);
1042                                         }
1043
1044                                         $secs[$section*2-1]=''; // erase old headline
1045                                         $count=$section+1;
1046                                         $break=false;
1047                                         while(!empty($secs[$count*2-1]) && !$break) {
1048
1049                                                 $subheadline=$secs[$count*2-1];
1050                                                 preg_match(
1051                                                  '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
1052                                                 $subhlevel=$matches[1];
1053                                                 if(strpos($subhlevel,'=')!==false) {
1054                                                         $subhlevel=strlen($subhlevel);
1055                                                 }
1056                                                 if($subhlevel > $hlevel) {
1057                                                         // erase old subsections
1058                                                         $secs[$count*2-1]='';
1059                                                         $secs[$count*2]='';
1060                                                 }
1061                                                 if($subhlevel <= $hlevel) {
1062                                                         $break=true;
1063                                                 }
1064                                                 $count++;
1065
1066                                         }
1067
1068                                 }
1069                                 $text=join('',$secs);
1070                                 # reinsert the stuff that we stripped out earlier
1071                                 $text=$parser->unstrip($text,$striparray);
1072                                 $text=$parser->unstripNoWiki($text,$striparray);
1073                         }
1074
1075                 }
1076                 return $text;
1077         }
1078
1079         /**
1080          * Change an existing article. Puts the previous version back into the old table, updates RC
1081          * and all necessary caches, mostly via the deferred update array.
1082          *
1083          * It is possible to call this function from a command-line script, but note that you should
1084          * first set $wgUser, and clean up $wgDeferredUpdates after each edit.
1085          */
1086         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
1087                 global $wgOut, $wgUser;
1088                 global $wgDBtransactions, $wgMwRedir;
1089                 global $wgUseSquid, $wgInternalServer, $wgPostCommitUpdateList;
1090
1091                 $fname = 'Article::updateArticle';
1092                 $good = true;
1093
1094                 $isminor = ( $minor && $wgUser->isLoggedIn() );
1095                 if ( $this->isRedirect( $text ) ) {
1096                         # Remove all content but redirect
1097                         # This could be done by reconstructing the redirect from a title given by
1098                         # Title::newFromRedirect(), but then we wouldn't know which synonym the user
1099                         # wants to see
1100                         if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ')[^\\n]+)/i', $text, $m ) ) {
1101                                 $redir = 1;
1102                                 $text = $m[1] . "\n";
1103                         }
1104                 }
1105                 else { $redir = 0; }
1106
1107                 $text = $this->preSaveTransform( $text );
1108                 $dbw =& wfGetDB( DB_MASTER );
1109                 $now = wfTimestampNow();
1110
1111                 # Update article, but only if changed.
1112
1113                 # It's important that we either rollback or complete, otherwise an attacker could
1114                 # overwrite cur entries by sending precisely timed user aborts. Random bored users
1115                 # could conceivably have the same effect, especially if cur is locked for long periods.
1116                 if( !$wgDBtransactions ) {
1117                         $userAbort = ignore_user_abort( true );
1118                 }
1119
1120                 $oldtext = $this->getContent( true );
1121                 $lastRevision = 0;
1122
1123                 if ( 0 != strcmp( $text, $oldtext ) ) {
1124                         $this->mGoodAdjustment = $this->isCountable( $text )
1125                           - $this->isCountable( $oldtext );
1126                         $this->mTotalAdjustment = 0;
1127                         $now = wfTimestampNow();
1128
1129                         $lastRevision = $dbw->selectField(
1130                                 'page', 'page_latest', array( 'page_id' => $this->getId() ) );
1131
1132                         $revision = new Revision( array(
1133                                 'page'       => $this->getId(),
1134                                 'comment'    => $summary,
1135                                 'minor_edit' => $isminor,
1136                                 'text'       => $text
1137                                 ) );
1138                         $revisionId = $revision->insertOn( $dbw );
1139
1140                         # Update page
1141                         $ok = $this->updateRevisionOn( $dbw, $revision, $lastRevision );
1142
1143                         if( !$ok ) {
1144                                 /* Belated edit conflict! Run away!! */
1145                                 $good = false;
1146                         } else {
1147                                 # Update recentchanges and purge cache and whatnot
1148                                 $bot = (int)($wgUser->isBot() || $forceBot);
1149                                 RecentChange::notifyEdit( $now, $this->mTitle, $isminor, $wgUser, $summary,
1150                                         $lastRevision, $this->getTimestamp(), $bot );
1151                                 Article::onArticleEdit( $this->mTitle );
1152                         }
1153                 }
1154
1155                 if( !$wgDBtransactions ) {
1156                         ignore_user_abort( $userAbort );
1157                 }
1158
1159                 if ( $good ) {
1160                         if ($watchthis) {
1161                                 if (!$this->mTitle->userIsWatching()) $this->watch();
1162                         } else {
1163                                 if ( $this->mTitle->userIsWatching() ) {
1164                                         $this->unwatch();
1165                                 }
1166                         }
1167                         # standard deferred updates
1168                         $this->editUpdates( $text, $summary, $minor, $now );
1169
1170
1171                         $urls = array();
1172                         # Template namespace
1173                         # Purge all articles linking here
1174                         if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
1175                                 $titles = $this->mTitle->getLinksTo();
1176                                 Title::touchArray( $titles );
1177                                 if ( $wgUseSquid ) {
1178                                                 foreach ( $titles as $title ) {
1179                                                         $urls[] = $title->getInternalURL();
1180                                                 }
1181                                 }
1182                         }
1183
1184                         # Squid updates
1185                         if ( $wgUseSquid ) {
1186                                 $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
1187                                 $u = new SquidUpdate( $urls );
1188                                 array_push( $wgPostCommitUpdateList, $u );
1189                         }
1190
1191                         $this->showArticle( $text, wfMsg( 'updated' ), $sectionanchor, $isminor, $now, $summary, $lastRevision );
1192                 }
1193                 return $good;
1194         }
1195
1196         /**
1197          * After we've either updated or inserted the article, update
1198          * the link tables and redirect to the new page.
1199          */
1200         function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid ) {
1201                 global $wgUseDumbLinkUpdate, $wgAntiLockFlags, $wgOut, $wgUser, $wgLinkCache, $wgEnotif;
1202
1203                 $wgLinkCache = new LinkCache();
1204
1205                 if ( !$wgUseDumbLinkUpdate ) {
1206                         # Preload links to reduce lock time
1207                         if ( $wgAntiLockFlags & ALF_PRELOAD_LINKS ) {
1208                                 $wgLinkCache->preFill( $this->mTitle );
1209                                 $wgLinkCache->clear();
1210                         }
1211                 }
1212                 # Parse the text and replace links with placeholders
1213                 # Do this outside the locks on the links table
1214                 # The existence test queries need to be FOR UPDATE
1215                 #$oldUpdate = $wgParser->forUpdate( true );
1216                 $wgOut = new OutputPage();
1217                 $wgOut->addWikiTextWithTitle( $text, $this->mTitle );
1218
1219                 # Select for update
1220                 $wgLinkCache->forUpdate( true );
1221
1222                 # Get old version of link table to allow incremental link updates
1223                 $wgLinkCache->preFill( $this->mTitle );
1224                 $wgLinkCache->clear();
1225
1226                 # Parse the text and replace links with placeholders
1227                 $wgOut = new OutputPage();
1228
1229                 # Pass the current title along in case we're creating a wiki page
1230                 # which is different than the currently displayed one (e.g. image
1231                 # pages created on file uploads); otherwise, link updates will
1232                 # go wrong.
1233                 $wgOut->addWikiTextWithTitle( $text, $this->mTitle );
1234
1235                 if ( !$wgUseDumbLinkUpdate ) {
1236                         # Move the current links back to the second register
1237                         $wgLinkCache->swapRegisters();
1238
1239                         # Get old version of link table to allow incremental link updates
1240                         # Lock this data now since it is needed for an update
1241                         $wgLinkCache->forUpdate( true );
1242                         $wgLinkCache->preFill( $this->mTitle );
1243
1244                         # Swap this old version back into its rightful place
1245                         $wgLinkCache->swapRegisters();
1246                 }
1247
1248                 if( $this->isRedirect( $text ) )
1249                         $r = 'redirect=no';
1250                 else
1251                         $r = '';
1252                 $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
1253
1254                 # this call would better fit into RecentChange::notifyEdit and RecentChange::notifyNew .
1255                 # this will be improved later (to-do)
1256
1257                 include_once( "UserMailer.php" );
1258                 $wgEnotif = new EmailNotification ();
1259                 $wgEnotif->notifyOnPageChange( $this->mTitle, $now, $summary, $me2, $oldid );
1260         }
1261
1262         /**
1263          * Mark this particular edit as patrolled
1264          */
1265         function markpatrolled() {
1266                 global $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgUseRCPatrol, $wgUser;
1267                 $wgOut->setRobotpolicy( 'noindex,follow' );
1268
1269                 if ( !$wgUseRCPatrol )
1270                 {
1271                         $wgOut->errorpage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1272                         return;
1273                 }
1274                 if ( $wgUser->isAnon() )
1275                 {
1276                         $wgOut->loginToUse();
1277                         return;
1278                 }
1279                 if ( $wgOnlySysopsCanPatrol && !$wgUser->isAllowed('patrol') )
1280                 {
1281                         $wgOut->sysopRequired();
1282                         return;
1283                 }
1284                 $rcid = $wgRequest->getVal( 'rcid' );
1285                 if ( !is_null ( $rcid ) )
1286                 {
1287                         RecentChange::markPatrolled( $rcid );
1288                         $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
1289                         $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
1290
1291                         $rcTitle = Title::makeTitle( NS_SPECIAL, 'Recentchanges' );
1292                         $wgOut->returnToMain( false, $rcTitle->getPrefixedText() );
1293                 }
1294                 else
1295                 {
1296                         $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1297                 }
1298         }
1299
1300         /**
1301          * Validate function
1302          */
1303         function validate() {
1304                 global $wgOut, $wgUser, $wgRequest, $wgUseValidation;
1305
1306                 if ( !$wgUseValidation ) # Are we using article validation at all?
1307                 {
1308                         $wgOut->errorpage( "nosuchspecialpage", "nospecialpagetext" );
1309                         return ;
1310                 }
1311
1312                 $wgOut->setRobotpolicy( 'noindex,follow' );
1313                 $revision = $wgRequest->getVal( 'revision' );
1314
1315                 include_once ( "SpecialValidate.php" ) ; # The "Validation" class
1316
1317                 $v = new Validation ;
1318                 if ( $wgRequest->getVal ( "mode" , "" ) == "list" )
1319                         $t = $v->showList ( $this ) ;
1320                 else if ( $wgRequest->getVal ( "mode" , "" ) == "details" )
1321                         $t = $v->showDetails ( $this , $wgRequest->getVal( 'revision' ) ) ;
1322                 else
1323                         $t = $v->validatePageForm ( $this , $revision ) ;
1324
1325                 $wgOut->addHTML ( $t ) ;
1326         }
1327
1328         /**
1329          * Add this page to $wgUser's watchlist
1330          */
1331
1332         function watch() {
1333
1334                 global $wgUser, $wgOut;
1335
1336                 if ( $wgUser->isAnon() ) {
1337                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1338                         return;
1339                 }
1340                 if ( wfReadOnly() ) {
1341                         $wgOut->readOnlyPage();
1342                         return;
1343                 }
1344
1345                 if (wfRunHooks('WatchArticle', array(&$wgUser, &$this))) {
1346
1347                         $wgUser->addWatch( $this->mTitle );
1348                         $wgUser->saveSettings();
1349
1350                         wfRunHooks('WatchArticleComplete', array(&$wgUser, &$this));
1351
1352                         $wgOut->setPagetitle( wfMsg( 'addedwatch' ) );
1353                         $wgOut->setRobotpolicy( 'noindex,follow' );
1354
1355                         $link = $this->mTitle->getPrefixedText();
1356                         $text = wfMsg( 'addedwatchtext', $link );
1357                         $wgOut->addWikiText( $text );
1358                 }
1359
1360                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1361         }
1362
1363         /**
1364          * Stop watching a page
1365          */
1366
1367         function unwatch() {
1368
1369                 global $wgUser, $wgOut;
1370
1371                 if ( $wgUser->isAnon() ) {
1372                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1373                         return;
1374                 }
1375                 if ( wfReadOnly() ) {
1376                         $wgOut->readOnlyPage();
1377                         return;
1378                 }
1379
1380                 if (wfRunHooks('UnwatchArticle', array(&$wgUser, &$this))) {
1381
1382                         $wgUser->removeWatch( $this->mTitle );
1383                         $wgUser->saveSettings();
1384
1385                         wfRunHooks('UnwatchArticleComplete', array(&$wgUser, &$this));
1386
1387                         $wgOut->setPagetitle( wfMsg( 'removedwatch' ) );
1388                         $wgOut->setRobotpolicy( 'noindex,follow' );
1389
1390                         $link = $this->mTitle->getPrefixedText();
1391                         $text = wfMsg( 'removedwatchtext', $link );
1392                         $wgOut->addWikiText( $text );
1393                 }
1394
1395                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1396         }
1397
1398         /**
1399          * protect a page
1400          */
1401         function protect( $limit = 'sysop' ) {
1402                 global $wgUser, $wgOut, $wgRequest;
1403
1404                 if ( ! $wgUser->isAllowed('protect') ) {
1405                         $wgOut->sysopRequired();
1406                         return;
1407                 }
1408                 if ( wfReadOnly() ) {
1409                         $wgOut->readOnlyPage();
1410                         return;
1411                 }
1412                 $id = $this->mTitle->getArticleID();
1413                 if ( 0 == $id ) {
1414                         $wgOut->fatalError( wfMsg( 'badarticleerror' ) );
1415                         return;
1416                 }
1417
1418                 $confirm = $wgRequest->wasPosted() &&
1419                         $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
1420                 $moveonly = $wgRequest->getBool( 'wpMoveOnly' );
1421                 $reason = $wgRequest->getText( 'wpReasonProtect' );
1422
1423                 if ( $confirm ) {
1424                         $dbw =& wfGetDB( DB_MASTER );
1425                         $dbw->update( 'page',
1426                                 array( /* SET */
1427                                         'page_touched' => $dbw->timestamp(),
1428                                         'page_restrictions' => (string)$limit
1429                                 ), array( /* WHERE */
1430                                         'page_id' => $id
1431                                 ), 'Article::protect'
1432                         );
1433
1434                         $restrictions = "move=" . $limit;
1435                         if( !$moveonly ) {
1436                                 $restrictions .= ":edit=" . $limit;
1437                         }
1438                         if (wfRunHooks('ArticleProtect', array(&$this, &$wgUser, $limit == 'sysop', $reason, $moveonly))) {
1439
1440                                 $dbw =& wfGetDB( DB_MASTER );
1441                                 $dbw->update( 'page',
1442                                                           array( /* SET */
1443                                                                          'page_touched' => $dbw->timestamp(),
1444                                                                          'page_restrictions' => $restrictions
1445                                                                          ), array( /* WHERE */
1446                                                                                            'page_id' => $id
1447                                                                                            ), 'Article::protect'
1448                                                           );
1449
1450                                 wfRunHooks('ArticleProtectComplete', array(&$this, &$wgUser, $limit == 'sysop', $reason, $moveonly));
1451
1452                                 $log = new LogPage( 'protect' );
1453                                 if ( $limit === '' ) {
1454                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1455                                 } else {
1456                                         $log->addEntry( 'protect', $this->mTitle, $reason );
1457                                 }
1458                                 $wgOut->redirect( $this->mTitle->getFullURL() );
1459                         }
1460                         return;
1461                 } else {
1462                         $reason = htmlspecialchars( wfMsg( 'protectreason' ) );
1463                         return $this->confirmProtect( '', $reason, $limit );
1464                 }
1465         }
1466
1467         /**
1468          * Output protection confirmation dialog
1469          */
1470         function confirmProtect( $par, $reason, $limit = 'sysop'  ) {
1471                 global $wgOut, $wgUser;
1472
1473                 wfDebug( "Article::confirmProtect\n" );
1474
1475                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1476                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1477
1478                 $check = '';
1479                 $protcom = '';
1480                 $moveonly = '';
1481
1482                 if ( $limit === '' ) {
1483                         $wgOut->setPageTitle( wfMsg( 'confirmunprotect' ) );
1484                         $wgOut->setSubtitle( wfMsg( 'unprotectsub', $sub ) );
1485                         $wgOut->addWikiText( wfMsg( 'confirmunprotecttext' ) );
1486                         $protcom = htmlspecialchars( wfMsg( 'unprotectcomment' ) );
1487                         $formaction = $this->mTitle->escapeLocalURL( 'action=unprotect' . $par );
1488                 } else {
1489                         $wgOut->setPageTitle( wfMsg( 'confirmprotect' ) );
1490                         $wgOut->setSubtitle( wfMsg( 'protectsub', $sub ) );
1491                         $wgOut->addWikiText( wfMsg( 'confirmprotecttext' ) );
1492                         $moveonly = htmlspecialchars( wfMsg( 'protectmoveonly' ) );
1493                         $protcom = htmlspecialchars( wfMsg( 'protectcomment' ) );
1494                         $formaction = $this->mTitle->escapeLocalURL( 'action=protect' . $par );
1495                 }
1496
1497                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1498                 $token = htmlspecialchars( $wgUser->editToken() );
1499
1500                 $wgOut->addHTML( "
1501 <form id='protectconfirm' method='post' action=\"{$formaction}\">
1502         <table border='0'>
1503                 <tr>
1504                         <td align='right'>
1505                                 <label for='wpReasonProtect'>{$protcom}:</label>
1506                         </td>
1507                         <td align='left'>
1508                                 <input type='text' size='60' name='wpReasonProtect' id='wpReasonProtect' value=\"" . htmlspecialchars( $reason ) . "\" />
1509                         </td>
1510                 </tr>" );
1511                 if($moveonly != '') {
1512                         $wgOut->AddHTML( "
1513                 <tr>
1514                         <td align='right'>
1515                                 <input type='checkbox' name='wpMoveOnly' value='1' id='wpMoveOnly' />
1516                         </td>
1517                         <td align='left'>
1518                                 <label for='wpMoveOnly'>{$moveonly}</label>
1519                         </td>
1520                 </tr> " );
1521                 }
1522                 $wgOut->addHTML( "
1523                 <tr>
1524                         <td>&nbsp;</td>
1525                         <td>
1526                                 <input type='submit' name='wpConfirmProtectB' value=\"{$confirm}\" />
1527                         </td>
1528                 </tr>
1529         </table>
1530         <input type='hidden' name='wpEditToken' value=\"{$token}\" />
1531 </form>" );
1532
1533                 $wgOut->returnToMain( false );
1534         }
1535
1536         /**
1537          * Unprotect the pages
1538          */
1539         function unprotect() {
1540                 return $this->protect( '' );
1541         }
1542
1543         /*
1544          * UI entry point for page deletion
1545          */
1546         function delete() {
1547                 global $wgUser, $wgOut, $wgMessageCache, $wgRequest;
1548                 $fname = 'Article::delete';
1549                 $confirm = $wgRequest->wasPosted() &&
1550                         $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
1551                 $reason = $wgRequest->getText( 'wpReason' );
1552
1553                 # This code desperately needs to be totally rewritten
1554
1555                 # Check permissions
1556                 if( ( !$wgUser->isAllowed( 'delete' ) ) ) {
1557                         $wgOut->sysopRequired();
1558                         return;
1559                 }
1560                 if( wfReadOnly() ) {
1561                         $wgOut->readOnlyPage();
1562                         return;
1563                 }
1564
1565                 # Better double-check that it hasn't been deleted yet!
1566                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1567                 if( !$this->mTitle->exists() ) {
1568                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1569                         return;
1570                 }
1571
1572                 if( $confirm ) {
1573                         $this->doDelete( $reason );
1574                         return;
1575                 }
1576
1577                 # determine whether this page has earlier revisions
1578                 # and insert a warning if it does
1579                 # we select the text because it might be useful below
1580                 $dbr =& $this->getDB();
1581                 $ns = $this->mTitle->getNamespace();
1582                 $title = $this->mTitle->getDBkey();
1583                 $revisions = $dbr->select( array( 'page', 'revision' ),
1584                         array( 'rev_id', 'rev_user_text' ),
1585                         array(
1586                                 'page_namespace' => $ns,
1587                                 'page_title' => $title,
1588                                 'rev_page = page_id'
1589                         ), $fname, $this->getSelectOptions( array( 'ORDER BY' => 'rev_timestamp DESC' ) )
1590                 );
1591
1592                 if( $dbr->numRows( $revisions ) > 1 && !$confirm ) {
1593                         $skin=$wgUser->getSkin();
1594                         $wgOut->addHTML('<b>'.wfMsg('historywarning'));
1595                         $wgOut->addHTML( $skin->historyLink() .'</b>');
1596                 }
1597
1598                 # Fetch cur_text
1599                 $rev =& Revision::newFromTitle( $this->mTitle );
1600
1601                 # Fetch name(s) of contributors
1602                 $rev_name = '';
1603                 $all_same_user = true;
1604                 while( $row = $dbr->fetchObject( $revisions ) ) {
1605                         if( $rev_name != '' && $rev_name != $row->rev_user_text ) {
1606                                 $all_same_user = false;
1607                         } else {
1608                                 $rev_name = $row->rev_user_text;
1609                         }
1610                 }
1611
1612                 if( !is_null( $rev ) ) {
1613                         # if this is a mini-text, we can paste part of it into the deletion reason
1614                         $text = $rev->getText();
1615
1616                         #if this is empty, an earlier revision may contain "useful" text
1617                         $blanked = false;
1618                         if( $text == '' ) {
1619                                 $prev = $rev->getPrevious();
1620                                 if( $prev ) {
1621                                         $text = $prev->getText();
1622                                         $blanked = true;
1623                                 }
1624                         }
1625
1626                         $length = strlen( $text );
1627
1628                         # this should not happen, since it is not possible to store an empty, new
1629                         # page. Let's insert a standard text in case it does, though
1630                         if( $length == 0 && $reason === '' ) {
1631                                 $reason = wfMsg( 'exblank' );
1632                         }
1633
1634                         if( $length < 500 && $reason === '' ) {
1635                                 # comment field=255, let's grep the first 150 to have some user
1636                                 # space left
1637                                 global $wgContLang;
1638                                 $text = $wgContLang->truncate( $text, 150, '...' );
1639
1640                                 # let's strip out newlines
1641                                 $text = preg_replace( "/[\n\r]/", '', $text );
1642
1643                                 if( !$blanked ) {
1644                                         if( !$all_same_user ) {
1645                                                 $reason = wfMsg( 'excontent', $text );
1646                                         } else {
1647                                                 $reason = wfMsg( 'excontentauthor', $text, $rev_name );
1648                                         }
1649                                 } else {
1650                                         $reason = wfMsg( 'exbeforeblank', $text );
1651                                 }
1652                         }
1653                 }
1654
1655                 return $this->confirmDelete( '', $reason );
1656         }
1657
1658         /**
1659          * Output deletion confirmation dialog
1660          */
1661         function confirmDelete( $par, $reason ) {
1662                 global $wgOut, $wgUser;
1663
1664                 wfDebug( "Article::confirmDelete\n" );
1665
1666                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1667                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1668                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1669                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1670
1671                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1672
1673                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1674                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1675                 $token = htmlspecialchars( $wgUser->editToken() );
1676
1677                 $wgOut->addHTML( "
1678 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1679         <table border='0'>
1680                 <tr>
1681                         <td align='right'>
1682                                 <label for='wpReason'>{$delcom}:</label>
1683                         </td>
1684                         <td align='left'>
1685                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1686                         </td>
1687                 </tr>
1688                 <tr>
1689                         <td>&nbsp;</td>
1690                         <td>
1691                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1692                         </td>
1693                 </tr>
1694         </table>
1695         <input type='hidden' name='wpEditToken' value=\"{$token}\" />
1696 </form>\n" );
1697
1698                 $wgOut->returnToMain( false );
1699         }
1700
1701
1702         /**
1703          * Perform a deletion and output success or failure messages
1704          */
1705         function doDelete( $reason ) {
1706                 global $wgOut, $wgUser, $wgContLang;
1707                 $fname = 'Article::doDelete';
1708                 wfDebug( $fname."\n" );
1709
1710                 if (wfRunHooks('ArticleDelete', array(&$this, &$wgUser, &$reason))) {
1711                         if ( $this->doDeleteArticle( $reason ) ) {
1712                                 $deleted = $this->mTitle->getPrefixedText();
1713
1714                                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1715                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1716
1717                                 $sk = $wgUser->getSkin();
1718                                 $loglink = $sk->makeKnownLink( $wgContLang->getNsText( NS_SPECIAL ) .
1719                                                                                            ':Log/delete',
1720                                                                                            wfMsg( 'deletionlog' ) );
1721
1722                                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
1723
1724                                 $wgOut->addHTML( '<p>' . $text . "</p>\n" );
1725                                 $wgOut->returnToMain( false );
1726                                 wfRunHooks('ArticleDeleteComplete', array(&$this, &$wgUser, $reason));
1727                         } else {
1728                                 $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1729                         }
1730                 }
1731         }
1732
1733         /**
1734          * Back-end article deletion
1735          * Deletes the article with database consistency, writes logs, purges caches
1736          * Returns success
1737          */
1738         function doDeleteArticle( $reason ) {
1739                 global $wgUser;
1740                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer, $wgPostCommitUpdateList;
1741
1742                 $fname = 'Article::doDeleteArticle';
1743                 wfDebug( $fname."\n" );
1744
1745                 $dbw =& wfGetDB( DB_MASTER );
1746                 $ns = $this->mTitle->getNamespace();
1747                 $t = $this->mTitle->getDBkey();
1748                 $id = $this->mTitle->getArticleID();
1749
1750                 if ( $t == '' || $id == 0 ) {
1751                         return false;
1752                 }
1753
1754                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ), -1 );
1755                 array_push( $wgDeferredUpdateList, $u );
1756
1757                 $linksTo = $this->mTitle->getLinksTo();
1758
1759                 # Squid purging
1760                 if ( $wgUseSquid ) {
1761                         $urls = array(
1762                                 $this->mTitle->getInternalURL(),
1763                                 $this->mTitle->getInternalURL( 'history' )
1764                         );
1765
1766                         $u = SquidUpdate::newFromTitles( $linksTo, $urls );
1767                         array_push( $wgPostCommitUpdateList, $u );
1768
1769                 }
1770
1771                 # Client and file cache invalidation
1772                 Title::touchArray( $linksTo );
1773
1774
1775                 // For now, shunt the revision data into the archive table.
1776                 // Text is *not* removed from the text table; bulk storage
1777                 // is left intact to avoid breaking block-compression or
1778                 // immutable storage schemes.
1779                 //
1780                 // For backwards compatibility, note that some older archive
1781                 // table entries will have ar_text and ar_flags fields still.
1782                 //
1783                 // In the future, we may keep revisions and mark them with
1784                 // the rev_deleted field, which is reserved for this purpose.
1785                 $dbw->insertSelect( 'archive', array( 'page', 'revision' ),
1786                         array(
1787                                 'ar_namespace'  => 'page_namespace',
1788                                 'ar_title'      => 'page_title',
1789                                 'ar_comment'    => 'rev_comment',
1790                                 'ar_user'       => 'rev_user',
1791                                 'ar_user_text'  => 'rev_user_text',
1792                                 'ar_timestamp'  => 'rev_timestamp',
1793                                 'ar_minor_edit' => 'rev_minor_edit',
1794                                 'ar_rev_id'     => 'rev_id',
1795                                 'ar_text_id'    => 'rev_text_id',
1796                         ), array(
1797                                 'page_id' => $id,
1798                                 'page_id = rev_page'
1799                         ), $fname
1800                 );
1801
1802                 # Now that it's safely backed up, delete it
1803                 $dbw->delete( 'revision', array( 'rev_page' => $id ), $fname );
1804                 $dbw->delete( 'page', array( 'page_id' => $id ), $fname);
1805
1806                 # Clean up recentchanges entries...
1807                 $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), $fname );
1808
1809                 # Finally, clean up the link tables
1810                 $t = $this->mTitle->getPrefixedDBkey();
1811
1812                 Article::onArticleDelete( $this->mTitle );
1813
1814                 # Delete outgoing links
1815                 $dbw->delete( 'pagelinks', array( 'pl_from' => $id ) );
1816                 $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
1817                 $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
1818
1819                 # Log the deletion
1820                 $log = new LogPage( 'delete' );
1821                 $log->addEntry( 'delete', $this->mTitle, $reason );
1822
1823                 # Clear the cached article id so the interface doesn't act like we exist
1824                 $this->mTitle->resetArticleID( 0 );
1825                 $this->mTitle->mArticleID = 0;
1826                 return true;
1827         }
1828
1829         /**
1830          * Revert a modification
1831          */
1832         function rollback() {
1833                 global $wgUser, $wgOut, $wgRequest;
1834                 $fname = 'Article::rollback';
1835
1836                 if ( ! $wgUser->isAllowed('rollback') ) {
1837                         $wgOut->sysopRequired();
1838                         return;
1839                 }
1840                 if ( wfReadOnly() ) {
1841                         $wgOut->readOnlyPage( $this->getContent( true ) );
1842                         return;
1843                 }
1844                 if( !$wgUser->matchEditToken( $wgRequest->getVal( 'token' ),
1845                         array( $this->mTitle->getPrefixedText(),
1846                                 $wgRequest->getVal( 'from' ) )  ) ) {
1847                         $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
1848                         $wgOut->addWikiText( wfMsg( 'sessionfailure' ) );
1849                         return;
1850                 }
1851                 $dbw =& wfGetDB( DB_MASTER );
1852
1853                 # Enhanced rollback, marks edits rc_bot=1
1854                 $bot = $wgRequest->getBool( 'bot' );
1855
1856                 # Replace all this user's current edits with the next one down
1857                 $tt = $this->mTitle->getDBKey();
1858                 $n = $this->mTitle->getNamespace();
1859
1860                 # Get the last editor, lock table exclusively
1861                 $dbw->begin();
1862                 $current = Revision::newFromTitle( $this->mTitle );
1863                 if( is_null( $current ) ) {
1864                         # Something wrong... no page?
1865                         $dbw->rollback();
1866                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
1867                         return;
1868                 }
1869
1870                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
1871                 if( $from != $current->getUserText() ) {
1872                         $wgOut->setPageTitle(wfmsg('rollbackfailed'));
1873                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
1874                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
1875                                 htmlspecialchars( $from ),
1876                                 htmlspecialchars( $current->getUserText() ) ) );
1877                         if( $current->getComment() != '') {
1878                                 $wgOut->addHTML(
1879                                         wfMsg( 'editcomment',
1880                                         htmlspecialchars( $current->getComment() ) ) );
1881                         }
1882                         return;
1883                 }
1884
1885                 # Get the last edit not by this guy
1886                 $user = IntVal( $current->getUser() );
1887                 $user_text = $dbw->addQuotes( $current->getUserText() );
1888                 $s = $dbw->selectRow( 'revision',
1889                         array( 'rev_id', 'rev_timestamp' ),
1890                         array(
1891                                 'rev_page' => $current->getPage(),
1892                                 "rev_user <> {$user} OR rev_user_text <> {$user_text}"
1893                         ), $fname,
1894                         array(
1895                                 'USE INDEX' => 'page_timestamp',
1896                                 'ORDER BY'  => 'rev_timestamp DESC' )
1897                         );
1898                 if( $s === false ) {
1899                         # Something wrong
1900                         $dbw->rollback();
1901                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
1902                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
1903                         return;
1904                 }
1905
1906                 if ( $bot ) {
1907                         # Mark all reverted edits as bot
1908                         $dbw->update( 'recentchanges',
1909                                 array( /* SET */
1910                                         'rc_bot' => 1
1911                                 ), array( /* WHERE */
1912                                         'rc_cur_id'    => $current->getPage(),
1913                                         'rc_user_text' => $current->getUserText(),
1914                                         "rc_timestamp > '{$s->rev_timestamp}'",
1915                                 ), $fname
1916                         );
1917                 }
1918
1919                 # Save it!
1920                 $target = Revision::newFromId( $s->rev_id );
1921                 $newcomment = wfMsg( 'revertpage', $target->getUserText(), $from );
1922
1923                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1924                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1925                 $wgOut->addHTML( '<h2>' . htmlspecialchars( $newcomment ) . "</h2>\n<hr />\n" );
1926
1927                 $this->updateArticle( $target->getText(), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1928                 Article::onArticleEdit( $this->mTitle );
1929
1930                 $dbw->commit();
1931                 $wgOut->returnToMain( false );
1932         }
1933
1934
1935         /**
1936          * Do standard deferred updates after page view
1937          * @private
1938          */
1939         function viewUpdates() {
1940                 global $wgDeferredUpdateList;
1941
1942                 if ( 0 != $this->getID() ) {
1943                         global $wgDisableCounters;
1944                         if( !$wgDisableCounters ) {
1945                                 Article::incViewCount( $this->getID() );
1946                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1947                                 array_push( $wgDeferredUpdateList, $u );
1948                         }
1949                 }
1950
1951                 # Update newtalk status if user is reading their own
1952                 # talk page
1953
1954                 global $wgUser;
1955                 if ($this->mTitle->getNamespace() == NS_USER_TALK &&
1956                         $this->mTitle->getText() == $wgUser->getName())
1957                 {
1958                         require_once( 'UserTalkUpdate.php' );
1959                         $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(), $this->mTitle->getDBkey(), false, false, false );
1960                 } else {
1961                         $wgUser->clearNotification( $this->mTitle );
1962                 }
1963
1964         }
1965
1966         /**
1967          * Do standard deferred updates after page edit.
1968          * Every 1000th edit, prune the recent changes table.
1969          * @private
1970          * @param string $text
1971          */
1972         function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange) {
1973                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1974                 global $wgMessageCache, $wgUser;
1975
1976                 wfSeedRandom();
1977                 if ( 0 == mt_rand( 0, 999 ) ) {
1978                         # Periodically flush old entries from the recentchanges table.
1979                         global $wgRCMaxAge;
1980                         $dbw =& wfGetDB( DB_MASTER );
1981                         $cutoff = $dbw->timestamp( time() - $wgRCMaxAge );
1982                         $recentchanges = $dbw->tableName( 'recentchanges' );
1983                         $sql = "DELETE FROM $recentchanges WHERE rc_timestamp < '{$cutoff}'";
1984                         $dbw->query( $sql );
1985                 }
1986                 $id = $this->getID();
1987                 $title = $this->mTitle->getPrefixedDBkey();
1988                 $shortTitle = $this->mTitle->getDBkey();
1989
1990                 if ( 0 != $id ) {
1991                         $u = new LinksUpdate( $id, $title );
1992                         array_push( $wgDeferredUpdateList, $u );
1993                         $u = new SiteStatsUpdate( 0, 1, $this->mGoodAdjustment, $this->mTotalAdjustment );
1994                         array_push( $wgDeferredUpdateList, $u );
1995                         $u = new SearchUpdate( $id, $title, $text );
1996                         array_push( $wgDeferredUpdateList, $u );
1997
1998                         # If this is another user's talk page,
1999                         # create a watchlist entry for this page
2000
2001                         if ($this->mTitle->getNamespace() == NS_USER_TALK &&
2002                                 $shortTitle != $wgUser->getName()) {
2003                                 require_once( 'UserTalkUpdate.php' );
2004                                 $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle, $summary, $minoredit, $timestamp_of_pagechange);
2005                         }
2006
2007                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
2008                                 $wgMessageCache->replace( $shortTitle, $text );
2009                         }
2010                 }
2011         }
2012
2013         /**
2014          * @todo document this function
2015          * @private
2016          * @param string $oldid         Revision ID of this article revision
2017          */
2018         function setOldSubtitle( $oldid=0 ) {
2019                 global $wgLang, $wgOut, $wgUser;
2020
2021                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
2022                 $sk = $wgUser->getSkin();
2023                 $lnk = $sk->makeKnownLinkObj ( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
2024                 $prevlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid );
2025                 $nextlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
2026                 $r = wfMsg( 'revisionasofwithlink', $td, $lnk, $prevlink, $nextlink );
2027                 $wgOut->setSubtitle( $r );
2028         }
2029
2030         /**
2031          * This function is called right before saving the wikitext,
2032          * so we can do things like signatures and links-in-context.
2033          *
2034          * @param string $text
2035          */
2036         function preSaveTransform( $text ) {
2037                 global $wgParser, $wgUser;
2038                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
2039         }
2040
2041         /* Caching functions */
2042
2043         /**
2044          * checkLastModified returns true if it has taken care of all
2045          * output to the client that is necessary for this request.
2046          * (that is, it has sent a cached version of the page)
2047          */
2048         function tryFileCache() {
2049                 static $called = false;
2050                 if( $called ) {
2051                         wfDebug( " tryFileCache() -- called twice!?\n" );
2052                         return;
2053                 }
2054                 $called = true;
2055                 if($this->isFileCacheable()) {
2056                         $touched = $this->mTouched;
2057                         $cache = new CacheManager( $this->mTitle );
2058                         if($cache->isFileCacheGood( $touched )) {
2059                                 global $wgOut;
2060                                 wfDebug( " tryFileCache() - about to load\n" );
2061                                 $cache->loadFromFileCache();
2062                                 return true;
2063                         } else {
2064                                 wfDebug( " tryFileCache() - starting buffer\n" );
2065                                 ob_start( array(&$cache, 'saveToFileCache' ) );
2066                         }
2067                 } else {
2068                         wfDebug( " tryFileCache() - not cacheable\n" );
2069                 }
2070         }
2071
2072         /**
2073          * Check if the page can be cached
2074          * @return bool
2075          */
2076         function isFileCacheable() {
2077                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
2078                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
2079
2080                 return $wgUseFileCache
2081                         and (!$wgShowIPinHeader)
2082                         and ($this->getID() != 0)
2083                         and ($wgUser->isAnon())
2084                         and (!$wgUser->getNewtalk())
2085                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
2086                         and (empty( $action ) || $action == 'view')
2087                         and (!isset($oldid))
2088                         and (!isset($diff))
2089                         and (!isset($redirect))
2090                         and (!isset($printable))
2091                         and (!$this->mRedirectedFrom);
2092         }
2093
2094         /**
2095          * Loads cur_touched and returns a value indicating if it should be used
2096          *
2097          */
2098         function checkTouched() {
2099                 $fname = 'Article::checkTouched';
2100                 if( !$this->mDataLoaded ) {
2101                         $dbr =& $this->getDB();
2102                         $data = $this->pageDataFromId( $dbr, $this->getId() );
2103                         if( $data ) {
2104                                 $this->loadPageData( $data );
2105                         }
2106                 }
2107                 return !$this->mIsRedirect;
2108         }
2109
2110         /**
2111          * Edit an article without doing all that other stuff
2112          * The article must already exist; link tables etc
2113          * are not updated, caches are not flushed.
2114          *
2115          * @param string $text text submitted
2116          * @param string $comment comment submitted
2117          * @param bool $minor whereas it's a minor modification
2118          */
2119         function quickEdit( $text, $comment = '', $minor = 0 ) {
2120                 $fname = 'Article::quickEdit';
2121                 wfProfileIn( $fname );
2122
2123                 $dbw =& wfGetDB( DB_MASTER );
2124                 $dbw->begin();
2125                 $revision = new Revision( array(
2126                         'page'       => $this->getId(),
2127                         'text'       => $text,
2128                         'comment'    => $comment,
2129                         'minor_edit' => $minor ? 1 : 0,
2130                         ) );
2131                 $revisionId = $revision->insertOn( $dbw );
2132                 $this->updateRevisionOn( $dbw, $revision );
2133                 $dbw->commit();
2134
2135                 wfProfileOut( $fname );
2136         }
2137
2138         /**
2139          * Used to increment the view counter
2140          *
2141          * @static
2142          * @param integer $id article id
2143          */
2144         function incViewCount( $id ) {
2145                 $id = intval( $id );
2146                 global $wgHitcounterUpdateFreq;
2147
2148                 $dbw =& wfGetDB( DB_MASTER );
2149                 $pageTable = $dbw->tableName( 'page' );
2150                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
2151                 $acchitsTable = $dbw->tableName( 'acchits' );
2152
2153                 if( $wgHitcounterUpdateFreq <= 1 ){ //
2154                         $dbw->query( "UPDATE $pageTable SET page_counter = page_counter + 1 WHERE page_id = $id" );
2155                         return;
2156                 }
2157
2158                 # Not important enough to warrant an error page in case of failure
2159                 $oldignore = $dbw->ignoreErrors( true );
2160
2161                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2162
2163                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2164                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2165                         # Most of the time (or on SQL errors), skip row count check
2166                         $dbw->ignoreErrors( $oldignore );
2167                         return;
2168                 }
2169
2170                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2171                 $row = $dbw->fetchObject( $res );
2172                 $rown = intval( $row->n );
2173                 if( $rown >= $wgHitcounterUpdateFreq ){
2174                         wfProfileIn( 'Article::incViewCount-collect' );
2175                         $old_user_abort = ignore_user_abort( true );
2176
2177                         $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2178                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable TYPE=HEAP ".
2179                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2180                                 'GROUP BY hc_id');
2181                         $dbw->query("DELETE FROM $hitcounterTable");
2182                         $dbw->query('UNLOCK TABLES');
2183                         $dbw->query("UPDATE $pageTable,$acchitsTable SET page_counter=page_counter + hc_n ".
2184                                 'WHERE page_id = hc_id');
2185                         $dbw->query("DROP TABLE $acchitsTable");
2186
2187                         ignore_user_abort( $old_user_abort );
2188                         wfProfileOut( 'Article::incViewCount-collect' );
2189                 }
2190                 $dbw->ignoreErrors( $oldignore );
2191         }
2192
2193         /**#@+
2194          * The onArticle*() functions are supposed to be a kind of hooks
2195          * which should be called whenever any of the specified actions
2196          * are done.
2197          *
2198          * This is a good place to put code to clear caches, for instance.
2199          *
2200          * This is called on page move and undelete, as well as edit
2201          * @static
2202          * @param $title_obj a title object
2203          */
2204
2205         function onArticleCreate($title_obj) {
2206                 global $wgUseSquid, $wgPostCommitUpdateList;
2207
2208                 $title_obj->touchLinks();
2209                 $titles = $title_obj->getLinksTo();
2210
2211                 # Purge squid
2212                 if ( $wgUseSquid ) {
2213                         $urls = $title_obj->getSquidURLs();
2214                         foreach ( $titles as $linkTitle ) {
2215                                 $urls[] = $linkTitle->getInternalURL();
2216                         }
2217                         $u = new SquidUpdate( $urls );
2218                         array_push( $wgPostCommitUpdateList, $u );
2219                 }
2220         }
2221
2222         function onArticleDelete($title_obj) {
2223                 $title_obj->touchLinks();
2224         }
2225
2226         function onArticleEdit($title_obj) {
2227                 // This would be an appropriate place to purge caches.
2228                 // Why's this not in here now?
2229         }
2230
2231         /**#@-*/
2232
2233         /**
2234          * Info about this page
2235          * Called for ?action=info when $wgAllowPageInfo is on.
2236          *
2237          * @access public
2238          */
2239         function info() {
2240                 global $wgLang, $wgOut, $wgAllowPageInfo;
2241                 $fname = 'Article::info';
2242
2243                 if ( !$wgAllowPageInfo ) {
2244                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
2245                         return;
2246                 }
2247
2248                 $page = $this->mTitle->getSubjectPage();
2249
2250                 $wgOut->setPagetitle( $page->getPrefixedText() );
2251                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
2252
2253                 # first, see if the page exists at all.
2254                 $exists = $page->getArticleId() != 0;
2255                 if( !$exists ) {
2256                         $wgOut->addHTML( wfMsg('noarticletext') );
2257                 } else {
2258                         $dbr =& $this->getDB( DB_SLAVE );
2259                         $wl_clause = array(
2260                                 'wl_title'     => $page->getDBkey(),
2261                                 'wl_namespace' => $page->getNamespace() );
2262                         $numwatchers = $dbr->selectField(
2263                                 'watchlist',
2264                                 'COUNT(*)',
2265                                 $wl_clause,
2266                                 $fname,
2267                                 $this->getSelectOptions() );
2268
2269                         $pageInfo = $this->pageCountInfo( $page );
2270                         $talkInfo = $this->pageCountInfo( $page->getTalkPage() );
2271
2272                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $wgLang->formatNum( $numwatchers ) ) . '</li>' );
2273                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $wgLang->formatNum( $pageInfo['edits'] ) ) . '</li>');
2274                         if( $talkInfo ) {
2275                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $wgLang->formatNum( $talkInfo['edits'] ) ) . '</li>');
2276                         }
2277                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $wgLang->formatNum( $pageInfo['authors'] ) ) . '</li>' );
2278                         if( $talkInfo ) {
2279                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $wgLang->formatNum( $talkInfo['authors'] ) ) . '</li>' );
2280                         }
2281                         $wgOut->addHTML( '</ul>' );
2282
2283                 }
2284         }
2285
2286         /**
2287          * Return the total number of edits and number of unique editors
2288          * on a given page. If page does not exist, returns false.
2289          *
2290          * @param Title $title
2291          * @return array
2292          * @access private
2293          */
2294         function pageCountInfo( $title ) {
2295                 $id = $title->getArticleId();
2296                 if( $id == 0 ) {
2297                         return false;
2298                 }
2299
2300                 $dbr =& $this->getDB( DB_SLAVE );
2301
2302                 $rev_clause = array( 'rev_page' => $id );
2303                 $fname = 'Article::pageCountInfo';
2304
2305                 $edits = $dbr->selectField(
2306                         'revision',
2307                         'COUNT(rev_page)',
2308                         $rev_clause,
2309                         $fname,
2310                         $this->getSelectOptions() );
2311
2312                 $authors = $dbr->selectField(
2313                         'revision',
2314                         'COUNT(DISTINCT rev_user_text)',
2315                         $rev_clause,
2316                         $fname,
2317                         $this->getSelectOptions() );
2318
2319                 return array( 'edits' => $edits, 'authors' => $authors );
2320         }
2321
2322         /**
2323          * Return a list of templates used by this article.
2324          * Uses the links table to find the templates
2325          *
2326          * @return array
2327          */
2328         function getUsedTemplates() {
2329                 $result = array();
2330                 $id = $this->mTitle->getArticleID();
2331
2332                 $db =& wfGetDB( DB_SLAVE );
2333                 $res = $db->select( array( 'pagelinks' ),
2334                         array( 'pl_title' ),
2335                         array(
2336                                 'pl_from' => $id,
2337                                 'pl_namespace' => NS_TEMPLATE ),
2338                         'Article:getUsedTemplates' );
2339                 if ( false !== $res ) {
2340                         if ( $db->numRows( $res ) ) {
2341                                 while ( $row = $db->fetchObject( $res ) ) {
2342                                         $result[] = $row->pl_title;
2343                                 }
2344                         }
2345                 }
2346                 $db->freeResult( $res );
2347                 return $result;
2348         }
2349
2350
2351 }
2352
2353
2354 ?>