includes/Article.php

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