includes/Article.php

   1 <?php
   2 /**
   3  * File for articles
   4  * @package MediaWiki
   5  */
   6
   7 /**
   8  * Need the CacheManager to be loaded
   9  */
  10 require_once( 'CacheManager.php' );
  11 require_once( 'Revision.php' );
  12
  13 $wgArticleCurContentFields = false;
  14 $wgArticleOldContentFields = false;
  15
  16 /**
  17  * Class representing a MediaWiki article and history.
  18  *
  19  * See design.txt for an overview.
  20  * Note: edit user interface and cache support functions have been
  21  * moved to separate EditPage and CacheManager classes.
  22  *
  23  * @package MediaWiki
  24  */
  25 class Article {
  26         /**#@+
  27          * @access private
  28          */
  29         var $mContent, $mContentLoaded;
  30         var $mUser, $mTimestamp, $mUserText;
  31         var $mCounter, $mComment, $mGoodAdjustment, $mTotalAdjustment;
  32         var $mMinorEdit, $mRedirectedFrom;
  33         var $mTouched, $mFileCache, $mTitle;
  34         var $mId, $mTable;
  35         var $mForUpdate;
  36         var $mOldId;
  37         var $mRevIdFetched;
  38         var $mRevision;
  39         /**#@-*/
  40
  41         /**
  42          * Constructor and clear the article
  43          * @param mixed &$title
  44          */
  45         function Article( &$title ) {
  46                 $this->mTitle =& $title;
  47                 $this->clear();
  48         }
  49
  50         /**
  51          * get the title object of the article
  52          * @public
  53          */
  54         function getTitle() {
  55                 return $this->mTitle;
  56         }
  57
  58         /**
  59           * Clear the object
  60           * @private
  61           */
  62         function clear() {
  63                 $this->mDataLoaded    = false;
  64                 $this->mContentLoaded = false;
  65
  66                 $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
  67                 $this->mRedirectedFrom = $this->mUserText =
  68                 $this->mTimestamp = $this->mComment = $this->mFileCache = '';
  69                 $this->mGoodAdjustment = $this->mTotalAdjustment = 0;
  70                 $this->mTouched = '19700101000000';
  71                 $this->mForUpdate = false;
  72                 $this->mIsRedirect = false;
  73                 $this->mRevIdFetched = 0;
  74         }
  75
  76         /**
  77          * Note that getContent/loadContent may follow redirects if
  78          * not told otherwise, and so may cause a change to mTitle.
  79          *
  80          * @param $noredir
  81          * @return Return the text of this revision
  82         */
  83         function getContent( $noredir ) {
  84                 global $wgRequest, $wgUser, $wgOut;
  85
  86                 # Get variables from query string :P
  87                 $action = $wgRequest->getText( 'action', 'view' );
  88                 $section = $wgRequest->getText( 'section' );
  89                 $preload = $wgRequest->getText( 'preload' );
  90
  91                 $fname =  'Article::getContent';
  92                 wfProfileIn( $fname );
  93
  94                 if ( 0 == $this->getID() ) {
  95                         if ( 'edit' == $action ) {
  96                                 wfProfileOut( $fname );
  97                                 # Should we put something in the textarea?
  98                                 # if &preload=Pagename is set, we try to get
  99                                 # the revision text and put it in.
 100                                 if($preload) {
 101                                         $preloadTitle=Title::newFromText($preload);
 102                                         if(isset($preloadTitle) && $preloadTitle->userCanRead()) {
 103                                                 $rev=Revision::newFromTitle($preloadTitle);
 104                                                 if($rev) {
 105                                                 return $rev->getText();
 106                                                 }
 107                                         }
 108                                 }
 109                                 # Don't preload anything.
 110                                 # We used to put MediaWiki:Newarticletext here.
 111                                 # This is now shown above the edit box instead.
 112                                 return '';
 113                         }
 114                         wfProfileOut( $fname );
 115                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
 116                         return wfMsg( 'noarticletext' );
 117                 } else {
 118                         $this->loadContent( $noredir );
 119                         # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 120                         if ( $this->mTitle->getNamespace() == NS_USER_TALK &&
 121                           $wgUser->isIP($this->mTitle->getText()) &&
 122                           $action=='view'
 123                         ) {
 124                                 wfProfileOut( $fname );
 125                                 return $this->mContent . "\n" .wfMsg('anontalkpagetext');
 126                         } else {
 127                                 if($action=='edit') {
 128                                         if($section!='') {
 129                                                 if($section=='new') {
 130                                                         wfProfileOut( $fname );
 131                                                         return '';
 132                                                 }
 133
 134                                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 135                                                 # comments to be stripped as well)
 136                                                 $rv=$this->getSection($this->mContent,$section);
 137                                                 wfProfileOut( $fname );
 138                                                 return $rv;
 139                                         }
 140                                 }
 141                                 wfProfileOut( $fname );
 142                                 return $this->mContent;
 143                         }
 144                 }
 145         }
 146
 147         /**
 148          * This function returns the text of a section, specified by a number ($section).
 149          * A section is text under a heading like == Heading == or <h1>Heading</h1>, or
 150          * the first section before any such heading (section 0).
 151          *
 152          * If a section contains subsections, these are also returned.
 153          *
 154          * @param string $text text to look in
 155          * @param integer $section section number
 156          * @return string text of the requested section
 157          */
 158         function getSection($text,$section) {
 159
 160                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 161                 # comments to be stripped as well)
 162                 $striparray=array();
 163                 $parser=new Parser();
 164                 $parser->mOutputType=OT_WIKI;
 165                 $striptext=$parser->strip($text, $striparray, true);
 166
 167                 # now that we can be sure that no pseudo-sections are in the source,
 168                 # split it up by section
 169                 $secs =
 170                   preg_split(
 171                   '/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 172                   $striptext, -1,
 173                   PREG_SPLIT_DELIM_CAPTURE);
 174                 if($section==0) {
 175                         $rv=$secs[0];
 176                 } else {
 177                         $headline=$secs[$section*2-1];
 178                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 179                         $hlevel=$matches[1];
 180
 181                         # translate wiki heading into level
 182                         if(strpos($hlevel,'=')!==false) {
 183                                 $hlevel=strlen($hlevel);
 184                         }
 185
 186                         $rv=$headline. $secs[$section*2];
 187                         $count=$section+1;
 188
 189                         $break=false;
 190                         while(!empty($secs[$count*2-1]) && !$break) {
 191
 192                                 $subheadline=$secs[$count*2-1];
 193                                 preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 194                                 $subhlevel=$matches[1];
 195                                 if(strpos($subhlevel,'=')!==false) {
 196                                         $subhlevel=strlen($subhlevel);
 197                                 }
 198                                 if($subhlevel > $hlevel) {
 199                                         $rv.=$subheadline.$secs[$count*2];
 200                                 }
 201                                 if($subhlevel <= $hlevel) {
 202                                         $break=true;
 203                                 }
 204                                 $count++;
 205
 206                         }
 207                 }
 208                 # reinsert stripped tags
 209                 $rv=$parser->unstrip($rv,$striparray);
 210                 $rv=$parser->unstripNoWiki($rv,$striparray);
 211                 $rv=trim($rv);
 212                 return $rv;
 213
 214         }
 215
 216         /**
 217          * Return an array of the columns of the "cur"-table
 218          */
 219         function getContentFields() {
 220                 return $wgArticleContentFields = array(
 221                   'old_text','old_flags',
 222                   'rev_timestamp','rev_user', 'rev_user_text', 'rev_comment','page_counter',
 223                   'page_namespace', 'page_title', 'page_restrictions','page_touched','page_is_redirect' );
 224         }
 225
 226         /**
 227          * Return the oldid of the article that is to be shown.
 228          * For requests with a "direction", this is not the oldid of the
 229          * query
 230          */
 231         function getOldID() {
 232                 global $wgRequest, $wgOut;
 233                 static $lastid;
 234
 235                 if ( isset( $lastid ) ) {
 236                         return $lastid;
 237                 }
 238                 # Query variables :P
 239                 $oldid = $wgRequest->getVal( 'oldid' );
 240                 if ( isset( $oldid ) ) {
 241                         $oldid = IntVal( $oldid );
 242                         if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 243                                 $nextid = $this->mTitle->getNextRevisionID( $oldid );
 244                                 if ( $nextid  ) {
 245                                         $oldid = $nextid;
 246                                 } else {
 247                                         $wgOut->redirect( $this->mTitle->getFullURL( 'redirect=no' ) );
 248                                 }
 249                         } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 250                                 $previd = $this->mTitle->getPreviousRevisionID( $oldid );
 251                                 if ( $previd ) {
 252                                         $oldid = $previd;
 253                                 } else {
 254                                         # TODO
 255                                 }
 256                         }
 257                         $lastid = $oldid;
 258                 }
 259                 return @$oldid; # "@" to be able to return "unset" without PHP complaining
 260         }
 261
 262
 263         /**
 264          * Load the revision (including cur_text) into this object
 265          */
 266         function loadContent( $noredir = false ) {
 267                 global $wgOut, $wgRequest;
 268
 269                 if ( $this->mContentLoaded ) return;
 270
 271                 # Query variables :P
 272                 $oldid = $this->getOldID();
 273                 $redirect = $wgRequest->getVal( 'redirect' );
 274
 275                 $fname = 'Article::loadContent';
 276
 277                 # Pre-fill content with error message so that if something
 278                 # fails we'll have something telling us what we intended.
 279
 280                 $t = $this->mTitle->getPrefixedText();
 281
 282                 $noredir = $noredir || ($wgRequest->getVal( 'redirect' ) == 'no')
 283                         || $wgRequest->getCheck( 'rdfrom' );
 284                 $this->mOldId = $oldid;
 285                 $this->fetchContent( $oldid, $noredir, true );
 286         }
 287
 288
 289         /**
 290          * Fetch a page record with the given conditions
 291          * @param Database $dbr
 292          * @param array    $conditions
 293          * @access private
 294          */
 295         function pageData( &$dbr, $conditions ) {
 296                 return $dbr->selectRow( 'page',
 297                         array(
 298                                 'page_id',
 299                                 'page_namespace',
 300                                 'page_title',
 301                                 'page_restrictions',
 302                                 'page_counter',
 303                                 'page_is_redirect',
 304                                 'page_is_new',
 305                                 'page_random',
 306                                 'page_touched',
 307                                 'page_latest',
 308                                 'page_len' ),
 309                         $conditions,
 310                         'Article::pageData' );
 311         }
 312
 313         function pageDataFromTitle( &$dbr, $title ) {
 314                 return $this->pageData( $dbr, array(
 315                         'page_namespace' => $title->getNamespace(),
 316                         'page_title'     => $title->getDBkey() ) );
 317         }
 318
 319         function pageDataFromId( &$dbr, $id ) {
 320                 return $this->pageData( $dbr, array(
 321                         'page_id' => IntVal( $id ) ) );
 322         }
 323
 324         /**
 325          * Set the general counter, title etc data loaded from
 326          * some source.
 327          *
 328          * @param object $data
 329          * @access private
 330          */
 331         function loadPageData( $data ) {
 332                 $this->mTitle->loadRestrictions( $data->page_restrictions );
 333                 $this->mTitle->mRestrictionsLoaded = true;
 334
 335                 $this->mCounter    = $data->page_counter;
 336                 $this->mTouched    = wfTimestamp( TS_MW, $data->page_touched );
 337                 $this->mIsRedirect = $data->page_is_redirect;
 338                 $this->mLatest     = $data->page_latest;
 339
 340                 $this->mDataLoaded = true;
 341         }
 342
 343         /**
 344          * Get text of an article from database
 345          * @param int $oldid 0 for whatever the latest revision is
 346          * @param bool $noredir Set to false to follow redirects
 347          * @param bool $globalTitle Set to true to change the global $wgTitle object when following redirects or other unexpected title changes
 348          * @return string
 349          */
 350         function fetchContent( $oldid = 0, $noredir = true, $globalTitle = false ) {
 351                 if ( $this->mContentLoaded ) {
 352                         return $this->mContent;
 353                 }
 354                 $dbr =& $this->getDB();
 355                 $fname = 'Article::fetchContent';
 356
 357                 # Pre-fill content with error message so that if something
 358                 # fails we'll have something telling us what we intended.
 359                 $t = $this->mTitle->getPrefixedText();
 360                 if( $oldid ) {
 361                         $t .= ',oldid='.$oldid;
 362                 }
 363                 if( isset( $redirect ) ) {
 364                         $redirect = ($redirect == 'no') ? 'no' : 'yes';
 365                         $t .= ',redirect='.$redirect;
 366                 }
 367                 $this->mContent = wfMsg( 'missingarticle', $t );
 368
 369                 if( $oldid ) {
 370                         $revision = Revision::newFromId( $oldid );
 371                         if( is_null( $revision ) ) {
 372                                 wfDebug( "$fname failed to retrieve specified revision, id $oldid\n" );
 373                                 return false;
 374                         }
 375                         $data = $this->pageDataFromId( $dbr, $revision->getPage() );
 376                         if( !$data ) {
 377                                 wfDebug( "$fname failed to get page data linked to revision id $oldid\n" );
 378                                 return false;
 379                         }
 380                         $this->mTitle = Title::makeTitle( $data->page_namespace, $data->page_title );
 381                         $this->loadPageData( $data );
 382                 } else {
 383                         if( !$this->mDataLoaded ) {
 384                                 $data = $this->pageDataFromTitle( $dbr, $this->mTitle );
 385                                 if( !$data ) {
 386                                         wfDebug( "$fname failed to find page data for title " . $this->mTitle->getPrefixedText() . "\n" );
 387                                         return false;
 388                                 }
 389                                 $this->loadPageData( $data );
 390                         }
 391                         $revision = Revision::newFromId( $this->mLatest );
 392                         if( is_null( $revision ) ) {
 393                                 wfDebug( "$fname failed to retrieve current page, rev_id $data->page_latest\n" );
 394                                 return false;
 395                         }
 396                 }
 397
 398                 # If we got a redirect, follow it (unless we've been told
 399                 # not to by either the function parameter or the query
 400                 if ( !$oldid && !$noredir ) {
 401                         $rt = Title::newFromRedirect( $revision->getText() );
 402                         # process if title object is valid and not special:userlogout
 403                         if ( $rt && ! ( $rt->getNamespace() == NS_SPECIAL && $rt->getText() == 'Userlogout' ) ) {
 404                                 # Gotta hand redirects to special pages differently:
 405                                 # Fill the HTTP response "Location" header and ignore
 406                                 # the rest of the page we're on.
 407                                 global $wgDisableHardRedirects;
 408                                 if( $globalTitle && !$wgDisableHardRedirects ) {
 409                                         global $wgOut;
 410                                         if ( $rt->getInterwiki() != '' && $rt->isLocal() ) {
 411                                                 $source = $this->mTitle->getFullURL( 'redirect=no' );
 412                                                 $wgOut->redirect( $rt->getFullURL( 'rdfrom=' . urlencode( $source ) ) ) ;
 413                                                 return false;
 414                                         }
 415                                         if ( $rt->getNamespace() == NS_SPECIAL ) {
 416                                                 $wgOut->redirect( $rt->getFullURL() );
 417                                                 return false;
 418                                         }
 419                                 }
 420                                 $redirData = $this->pageDataFromTitle( $dbr, $rt );
 421                                 if( $redirData ) {
 422                                         $redirRev = Revision::newFromId( $redirData->page_latest );
 423                                         if( !is_null( $redirRev ) ) {
 424                                                 $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 425                                                 $this->mTitle = $rt;
 426                                                 $data = $redirData;
 427                                                 $this->loadPageData( $data );
 428                                                 $revision = $redirRev;
 429                                         }
 430                                 }
 431                         }
 432                 }
 433
 434                 # if the title's different from expected, update...
 435                 if( $globalTitle ) {
 436                         global $wgTitle;
 437                         if( !$this->mTitle->equals( $wgTitle ) ) {
 438                                 $wgTitle = $this->mTitle;
 439                         }
 440                 }
 441
 442                 # Back to the business at hand...
 443                 $this->mContent   = $revision->getText();
 444
 445                 $this->mUser      = $revision->getUser();
 446                 $this->mUserText  = $revision->getUserText();
 447                 $this->mComment   = $revision->getComment();
 448                 $this->mTimestamp = wfTimestamp( TS_MW, $revision->getTimestamp() );
 449
 450                 $this->mRevIdFetched = $revision->getID();
 451                 $this->mContentLoaded = true;
 452                 $this->mRevision =& $revision;
 453
 454                 return $this->mContent;
 455         }
 456
 457         /**
 458          * Gets the article text without using so many damn globals
 459          * Returns false on error
 460          *
 461          * @param integer $oldid
 462          */
 463         function getContentWithoutUsingSoManyDamnGlobals( $oldid = 0, $noredir = false ) {
 464                 return $this->fetchContent( $oldid, $noredir, false );
 465         }
 466
 467         /**
 468          * Read/write accessor to select FOR UPDATE
 469          */
 470         function forUpdate( $x = NULL ) {
 471                 return wfSetVar( $this->mForUpdate, $x );
 472         }
 473
 474         /**
 475          * Get the database which should be used for reads
 476          */
 477         function &getDB() {
 478                 #if ( $this->mForUpdate ) {
 479                         return wfGetDB( DB_MASTER );
 480                 #} else {
 481                 #       return wfGetDB( DB_SLAVE );
 482                 #}
 483         }
 484
 485         /**
 486          * Get options for all SELECT statements
 487          * Can pass an option array, to which the class-wide options will be appended
 488          */
 489         function getSelectOptions( $options = '' ) {
 490                 if ( $this->mForUpdate ) {
 491                         if ( is_array( $options ) ) {
 492                                 $options[] = 'FOR UPDATE';
 493                         } else {
 494                                 $options = 'FOR UPDATE';
 495                         }
 496                 }
 497                 return $options;
 498         }
 499
 500         /**
 501          * Return the Article ID
 502          */
 503         function getID() {
 504                 if( $this->mTitle ) {
 505                         return $this->mTitle->getArticleID();
 506                 } else {
 507                         return 0;
 508                 }
 509         }
 510
 511         /**
 512          * Returns true if this article exists in the database.
 513          * @return bool
 514          */
 515         function exists() {
 516                 return $this->getId() != 0;
 517         }
 518
 519         /**
 520          * Get the view count for this article
 521          */
 522         function getCount() {
 523                 if ( -1 == $this->mCounter ) {
 524                         $id = $this->getID();
 525                         $dbr =& $this->getDB();
 526                         $this->mCounter = $dbr->selectField( 'page', 'page_counter', array( 'page_id' => $id ),
 527                                 'Article::getCount', $this->getSelectOptions() );
 528                 }
 529                 return $this->mCounter;
 530         }
 531
 532         /**
 533          * Would the given text make this article a "good" article (i.e.,
 534          * suitable for including in the article count)?
 535          * @param string $text Text to analyze
 536          * @return integer 1 if it can be counted else 0
 537          */
 538         function isCountable( $text ) {
 539                 global $wgUseCommaCount;
 540
 541                 if ( NS_MAIN != $this->mTitle->getNamespace() ) { return 0; }
 542                 if ( $this->isRedirect( $text ) ) { return 0; }
 543                 $token = ($wgUseCommaCount ? ',' : '[[' );
 544                 if ( false === strstr( $text, $token ) ) { return 0; }
 545                 return 1;
 546         }
 547
 548         /**
 549          * Tests if the article text represents a redirect
 550          */
 551         function isRedirect( $text = false ) {
 552                 if ( $text === false ) {
 553                         $this->loadContent();
 554                         $titleObj = Title::newFromRedirect( $this->fetchContent() );
 555                 } else {
 556                         $titleObj = Title::newFromRedirect( $text );
 557                 }
 558                 return $titleObj !== NULL;
 559         }
 560
 561         /**
 562          * Returns true if the currently-referenced revision is the current edit
 563          * to this page (and it exists).
 564          * @return bool
 565          */
 566         function isCurrent() {
 567                 return $this->exists() &&
 568                         isset( $this->mRevision ) &&
 569                         $this->mRevision->isCurrent();
 570         }
 571
 572         /**
 573          * Loads everything except the text
 574          * This isn't necessary for all uses, so it's only done if needed.
 575          * @private
 576          */
 577         function loadLastEdit() {
 578                 global $wgOut;
 579
 580                 if ( -1 != $this->mUser )
 581                         return;
 582
 583                 # New or non-existent articles have no user information
 584                 $id = $this->getID();
 585                 if ( 0 == $id ) return;
 586
 587                 $this->mLastRevision = Revision::loadFromPageId( $this->getDB(), $id );
 588                 if( !is_null( $this->mLastRevision ) ) {
 589                         $this->mUser      = $this->mLastRevision->getUser();
 590                         $this->mUserText  = $this->mLastRevision->getUserText();
 591                         $this->mTimestamp = $this->mLastRevision->getTimestamp();
 592                         $this->mComment   = $this->mLastRevision->getComment();
 593                         $this->mMinorEdit = $this->mLastRevision->isMinor();
 594                 }
 595         }
 596
 597         function getTimestamp() {
 598                 $this->loadLastEdit();
 599                 return $this->mTimestamp;
 600         }
 601
 602         function getUser() {
 603                 $this->loadLastEdit();
 604                 return $this->mUser;
 605         }
 606
 607         function getUserText() {
 608                 $this->loadLastEdit();
 609                 return $this->mUserText;
 610         }
 611
 612         function getComment() {
 613                 $this->loadLastEdit();
 614                 return $this->mComment;
 615         }
 616
 617         function getMinorEdit() {
 618                 $this->loadLastEdit();
 619                 return $this->mMinorEdit;
 620         }
 621
 622         function getRevIdFetched() {
 623                 $this->loadLastEdit();
 624                 return $this->mRevIdFetched;
 625         }
 626
 627         function getContributors($limit = 0, $offset = 0) {
 628                 $fname = 'Article::getContributors';
 629
 630                 # XXX: this is expensive; cache this info somewhere.
 631
 632                 $title = $this->mTitle;
 633                 $contribs = array();
 634                 $dbr =& $this->getDB();
 635                 $revTable = $dbr->tableName( 'revision' );
 636                 $userTable = $dbr->tableName( 'user' );
 637                 $encDBkey = $dbr->addQuotes( $title->getDBkey() );
 638                 $ns = $title->getNamespace();
 639                 $user = $this->getUser();
 640                 $pageId = $this->getId();
 641
 642                 $sql = "SELECT rev_user, rev_user_text, user_real_name, MAX(rev_timestamp) as timestamp
 643                         FROM $revTable LEFT JOIN $userTable ON rev_user = user_id
 644                         WHERE rev_page = $pageId
 645                         AND rev_user != $user
 646                         GROUP BY rev_user, rev_user_text, user_real_name
 647                         ORDER BY timestamp DESC";
 648
 649                 if ($limit > 0) { $sql .= ' LIMIT '.$limit; }
 650                 $sql .= ' '. $this->getSelectOptions();
 651
 652                 $res = $dbr->query($sql, $fname);
 653
 654                 while ( $line = $dbr->fetchObject( $res ) ) {
 655                         $contribs[] = array($line->rev_user, $line->rev_user_text, $line->user_real_name);
 656                 }
 657
 658                 $dbr->freeResult($res);
 659                 return $contribs;
 660         }
 661
 662         /**
 663          * This is the default action of the script: just view the page of
 664          * the given title.
 665         */
 666         function view() {
 667                 global $wgUser, $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgLang;
 668                 global $wgLinkCache, $IP, $wgEnableParserCache, $wgStylePath, $wgUseRCPatrol;
 669                 global $wgEnotif, $wgParser, $wgParserCache;
 670                 $sk = $wgUser->getSkin();
 671
 672                 $fname = 'Article::view';
 673                 wfProfileIn( $fname );
 674                 # Get variables from query string
 675                 $oldid = $this->getOldID();
 676                 $diff = $wgRequest->getVal( 'diff' );
 677                 $rcid = $wgRequest->getVal( 'rcid' );
 678                 $rdfrom = $wgRequest->getVal( 'rdfrom' );
 679
 680                 $wgOut->setArticleFlag( true );
 681                 $wgOut->setRobotpolicy( 'index,follow' );
 682                 # If we got diff and oldid in the query, we want to see a
 683                 # diff page instead of the article.
 684
 685                 if ( !is_null( $diff ) ) {
 686                         require_once( 'DifferenceEngine.php' );
 687                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 688
 689                         $de = new DifferenceEngine( $oldid, $diff, $rcid );
 690                         // DifferenceEngine directly fetched the revision:
 691                         $this->mRevIdFetched = $de->mNewid;
 692                         $de->showDiffPage();
 693
 694                         if( $diff == 0 ) {
 695                                 # Run view updates for current revision only
 696                                 $this->viewUpdates();
 697                         }
 698                         wfProfileOut( $fname );
 699                         return;
 700                 }
 701
 702                 if ( empty( $oldid ) && $this->checkTouched() ) {
 703                         $wgOut->setETag($wgParserCache->getETag($this, $wgUser));
 704
 705                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 706                                 wfProfileOut( $fname );
 707                                 return;
 708                         } else if ( $this->tryFileCache() ) {
 709                                 # tell wgOut that output is taken care of
 710                                 $wgOut->disable();
 711                                 $this->viewUpdates();
 712                                 wfProfileOut( $fname );
 713                                 return;
 714                         }
 715                 }
 716                 # Should the parser cache be used?
 717                 $pcache = $wgEnableParserCache &&
 718                         intval( $wgUser->getOption( 'stubthreshold' ) ) == 0 &&
 719                         $this->exists() &&
 720                         empty( $oldid );
 721                 wfDebug( 'Article::view using parser cache: ' . ($pcache ? 'yes' : 'no' ) . "\n" );
 722
 723                 $outputDone = false;
 724                 if ( $pcache ) {
 725                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 726                                 $outputDone = true;
 727                         }
 728                 }
 729                 if ( !$outputDone ) {
 730                         $text = $this->getContent( false ); # May change mTitle by following a redirect
 731
 732                         # Another whitelist check in case oldid or redirects are altering the title
 733                         if ( !$this->mTitle->userCanRead() ) {
 734                                 $wgOut->loginToUse();
 735                                 $wgOut->output();
 736                                 exit;
 737                         }
 738
 739                         # We're looking at an old revision
 740
 741                         if ( !empty( $oldid ) ) {
 742                                 $this->setOldSubtitle( isset($this->mOldId) ? $this->mOldId : $oldid );
 743                                 $wgOut->setRobotpolicy( 'noindex,follow' );
 744                         }
 745                         if ( '' != $this->mRedirectedFrom ) {
 746                                 $sk = $wgUser->getSkin();
 747                                 $redir = $sk->makeKnownLink( $this->mRedirectedFrom, '',
 748                                   'redirect=no' );
 749                                 $s = wfMsg( 'redirectedfrom', $redir );
 750                                 $wgOut->setSubtitle( $s );
 751
 752                                 # Can't cache redirects
 753                                 $pcache = false;
 754                         } elseif ( !empty( $rdfrom ) ) {
 755                                 global $wgRedirectSources;
 756                                 if( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 757                                         $sk = $wgUser->getSkin();
 758                                         $redir = $sk->makeExternalLink( $rdfrom, $rdfrom );
 759                                         $s = wfMsg( 'redirectedfrom', $redir );
 760                                         $wgOut->setSubtitle( $s );
 761                                 }
 762                         }
 763
 764                         # wrap user css and user js in pre and don't parse
 765                         # XXX: use $this->mTitle->usCssJsSubpage() when php is fixed/ a workaround is found
 766                         if (
 767                                 $this->mTitle->getNamespace() == NS_USER &&
 768                                 preg_match('/\\/[\\w]+\\.(css|js)$/', $this->mTitle->getDBkey())
 769                         ) {
 770                                 $wgOut->addWikiText( wfMsg('clearyourcache'));
 771                                 $wgOut->addHTML( '<pre>'.htmlspecialchars($this->mContent)."\n</pre>" );
 772                         } else if ( $rt = Title::newFromRedirect( $text ) ) {
 773                                 # Display redirect
 774                                 $imageUrl = $wgStylePath.'/common/images/redirect.png';
 775                                 $targetUrl = $rt->escapeLocalURL();
 776                                 $titleText = htmlspecialchars( $rt->getPrefixedText() );
 777                                 $link = $sk->makeLinkObj( $rt );
 778
 779                                 $wgOut->addHTML( '<img valign="center" src="'.$imageUrl.'" alt="#REDIRECT" />' .
 780                                   '<span class="redirectText">'.$link.'</span>' );
 781
 782                                 $parseout = $wgParser->parse($text, $this->mTitle, ParserOptions::newFromUser($wgUser));
 783                                 $catlinks = $parseout->getCategoryLinks();
 784                                 $wgOut->addCategoryLinks($catlinks);
 785                                 $skin = $wgUser->getSkin();
 786                         } else if ( $pcache ) {
 787                                 # Display content and save to parser cache
 788                                 $wgOut->addPrimaryWikiText( $text, $this );
 789                         } else {
 790                                 # Display content, don't attempt to save to parser cache
 791
 792                                 # Don't show section-edit links on old revisions... this way lies madness.
 793                                 if( !$this->isCurrent() ) {
 794                                         $oldEditSectionSetting = $wgOut->mParserOptions->setEditSection( false );
 795                                 }
 796                                 $wgOut->addWikiText( $text );
 797
 798                                 if( !$this->isCurrent() ) {
 799                                         $wgOut->mParserOptions->setEditSection( $oldEditSectionSetting );
 800                                 }
 801                         }
 802                 }
 803                 /* title may have been set from the cache */
 804                 $t = $wgOut->getPageTitle();
 805                 if( empty( $t ) ) {
 806                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 807                 }
 808
 809                 # If we have been passed an &rcid= parameter, we want to give the user a
 810                 # chance to mark this new article as patrolled.
 811                 if ( $wgUseRCPatrol
 812                         && !is_null($rcid)
 813                         && $rcid != 0
 814                         && $wgUser->isLoggedIn()
 815                         && ( $wgUser->isAllowed('patrol') || !$wgOnlySysopsCanPatrol ) )
 816                 {
 817                         $wgOut->addHTML(
 818                                 "<div class='patrollink'>" .
 819                                         wfMsg ( 'markaspatrolledlink',
 820                                         $sk->makeKnownLinkObj( $this->mTitle, wfMsg('markaspatrolledtext'), "action=markpatrolled&rcid=$rcid" )
 821                                         ) .
 822                                 '</div>'
 823                          );
 824                 }
 825
 826                 # Put link titles into the link cache
 827                 $wgOut->transformBuffer();
 828
 829                 # Add link titles as META keywords
 830                 $wgOut->addMetaTags() ;
 831
 832                 $this->viewUpdates();
 833                 wfProfileOut( $fname );
 834         }
 835
 836         function render() {
 837                 global $wgOut;
 838
 839                 $wgOut->setArticleBodyOnly(true);
 840                 $this->view();
 841         }
 842
 843         /**
 844          * Insert a new empty page record for this article.
 845          * This *must* be followed up by creating a revision
 846          * and running $this->updateToLatest( $rev_id );
 847          * or else the record will be left in a funky state.
 848          * Best if all done inside a transaction.
 849          *
 850          * @param Database $dbw
 851          * @param string   $restrictions
 852          * @return int     The newly created page_id key
 853          * @access private
 854          */
 855         function insertOn( &$dbw, $restrictions = '' ) {
 856                 $fname = 'Article::insertOn';
 857                 wfProfileIn( $fname );
 858
 859                 $page_id = $dbw->nextSequenceValue( 'page_page_id_seq' );
 860                 $dbw->insert( 'page', array(
 861                         'page_id'           => $page_id,
 862                         'page_namespace'    => $this->mTitle->getNamespace(),
 863                         'page_title'        => $this->mTitle->getDBkey(),
 864                         'page_counter'      => 0,
 865                         'page_restrictions' => $restrictions,
 866                         'page_is_redirect'  => 0, # Will set this shortly...
 867                         'page_is_new'       => 1,
 868                         'page_random'       => wfRandom(),
 869                         'page_touched'      => $dbw->timestamp(),
 870                         'page_latest'       => 0, # Fill this in shortly...
 871                 ), $fname );
 872                 $newid = $dbw->insertId();
 873
 874                 $this->mTitle->resetArticleId( $newid );
 875
 876                 wfProfileOut( $fname );
 877                 return $newid;
 878         }
 879
 880         /**
 881          * Update the page record to point to a newly saved revision.
 882          *
 883          * @param Database $dbw
 884          * @param Revision $revision -- for ID number, and text used to set
 885                                         length and redirect status fields
 886          * @param int $lastRevision -- if given, will not overwrite the page field
 887          *                             when different from the currently set value.
 888          *                             Giving 0 indicates the new page flag should
 889          *                             be set on.
 890          * @return bool true on success, false on failure
 891          * @access private
 892          */
 893         function updateRevisionOn( &$dbw, $revision, $lastRevision = null ) {
 894                 $fname = 'Article::updateToRevision';
 895                 wfProfileIn( $fname );
 896
 897                 $conditions = array( 'page_id' => $this->getId() );
 898                 if( !is_null( $lastRevision ) ) {
 899                         # An extra check against threads stepping on each other
 900                         $conditions['page_latest'] = $lastRevision;
 901                 }
 902                 $text = $revision->getText();
 903                 $dbw->update( 'page',
 904                         array( /* SET */
 905                                 'page_latest'      => $revision->getId(),
 906                                 'page_touched'     => $dbw->timestamp(),
 907                                 'page_is_new'      => ($lastRevision === 0) ? 1 : 0,
 908                                 'page_is_redirect' => Article::isRedirect( $text ),
 909                                 'page_len'         => strlen( $text ),
 910                         ),
 911                         $conditions,
 912                         $fname );
 913
 914                 wfProfileOut( $fname );
 915                 return ( $dbw->affectedRows() != 0 );
 916         }
 917
 918         /**
 919          * If the given revision is newer than the currently set page_latest,
 920          * update the page record. Otherwise, do nothing.
 921          *
 922          * @param Database $dbw
 923          * @param Revision $revision
 924          */
 925         function updateIfNewerOn( &$dbw, $revision ) {
 926                 $fname = 'Article::updateIfNewerOn';
 927                 wfProfileIn( $fname );
 928
 929                 $row = $dbw->selectRow(
 930                         array( 'revision', 'page' ),
 931                         array( 'rev_id', 'rev_timestamp' ),
 932                         array(
 933                                 'page_id' => $this->getId(),
 934                                 'page_latest=rev_id' ),
 935                         $fname );
 936                 if( $row ) {
 937                         if( $row->rev_timestamp >= $revision->getTimestamp() ) {
 938                                 wfProfileOut( $fname );
 939                                 return false;
 940                         }
 941                         $prev = $row->rev_id;
 942                 } else {
 943                         # No or missing previous revision; mark the page as new
 944                         $prev = 0;
 945                 }
 946
 947                 $ret = $this->updateRevisionOn( $dbw, $revision, $prev );
 948                 wfProfileOut( $fname );
 949                 return $ret;
 950         }
 951
 952         /**
 953          * Theoretically we could defer these whole insert and update
 954          * functions for after display, but that's taking a big leap
 955          * of faith, and we want to be able to report database
 956          * errors at some point.
 957          * @private
 958          */
 959         function insertNewArticle( $text, $summary, $isminor, $watchthis, $suppressRC=false ) {
 960                 global $wgOut, $wgUser;
 961                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 962
 963                 $fname = 'Article::insertNewArticle';
 964
 965                 $this->mGoodAdjustment = $this->isCountable( $text );
 966                 $this->mTotalAdjustment = 1;
 967
 968                 $ns = $this->mTitle->getNamespace();
 969                 $ttl = $this->mTitle->getDBkey();
 970                 $text = $this->preSaveTransform( $text );
 971                 $isminor = ( $isminor && $wgUser->isLoggedIn() ) ? 1 : 0;
 972                 $now = wfTimestampNow();
 973
 974                 $dbw =& wfGetDB( DB_MASTER );
 975
 976                 # Add the page record; stake our claim on this title!
 977                 $newid = $this->insertOn( $dbw );
 978
 979                 # Save the revision text...
 980                 $revision = new Revision( array(
 981                         'page'       => $newid,
 982                         'comment'    => $summary,
 983                         'minor_edit' => $isminor,
 984                         'text'       => $text
 985                         ) );
 986                 $revisionId = $revision->insertOn( $dbw );
 987
 988                 $this->mTitle->resetArticleID( $newid );
 989
 990                 # Update the page record with revision data
 991                 $this->updateRevisionOn( $dbw, $revision, 0 );
 992
 993                 Article::onArticleCreate( $this->mTitle );
 994                 if(!$suppressRC) {
 995                         RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary, 'default',
 996                           '', strlen( $text ), $revisionId );
 997                 }
 998
 999                 if ($watchthis) {
1000                         if(!$this->mTitle->userIsWatching()) $this->watch();
1001                 } else {
1002                         if ( $this->mTitle->userIsWatching() ) {
1003                                 $this->unwatch();
1004                         }
1005                 }
1006
1007                 # The talk page isn't in the regular link tables, so we need to update manually:
1008                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
1009                 $dbw->update( 'page',
1010                         array( 'page_touched' => $dbw->timestamp($now) ),
1011                         array( 'page_namespace' => $talkns,
1012                                'page_title' => $ttl ),
1013                         $fname );
1014
1015                 # standard deferred updates
1016                 $this->editUpdates( $text, $summary, $isminor, $now );
1017
1018                 $oldid = 0; # new article
1019                 $this->showArticle( $text, wfMsg( 'newarticle' ), false, $isminor, $now, $summary, $oldid );
1020         }
1021
1022         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = '', $edittime = NULL) {
1023                 $fname = 'Article::getTextOfLastEditWithSectionReplacedOrAdded';
1024                 if ($section != '') {
1025                         if( is_null( $edittime ) ) {
1026                                 $rev = Revision::newFromTitle( $this->mTitle );
1027                         } else {
1028                                 $dbw =& wfGetDB( DB_MASTER );
1029                                 $rev = Revision::loadFromTimestamp( $dbw, $this->mTitle, $edittime );
1030                         }
1031                         $oldtext = $rev->getText();
1032
1033                         if($section=='new') {
1034                                 if($summary) $subject="== {$summary} ==\n\n";
1035                                 $text=$oldtext."\n\n".$subject.$text;
1036                         } else {
1037
1038                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
1039                                 # comments to be stripped as well)
1040                                 $striparray=array();
1041                                 $parser=new Parser();
1042                                 $parser->mOutputType=OT_WIKI;
1043                                 $oldtext=$parser->strip($oldtext, $striparray, true);
1044
1045                                 # now that we can be sure that no pseudo-sections are in the source,
1046                                 # split it up
1047                                 # Unfortunately we can't simply do a preg_replace because that might
1048                                 # replace the wrong section, so we have to use the section counter instead
1049                                 $secs=preg_split('/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
1050                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
1051                                 $secs[$section*2]=$text."\n\n"; // replace with edited
1052
1053                                 # section 0 is top (intro) section
1054                                 if($section!=0) {
1055
1056                                         # headline of old section - we need to go through this section
1057                                         # to determine if there are any subsections that now need to
1058                                         # be erased, as the mother section has been replaced with
1059                                         # the text of all subsections.
1060                                         $headline=$secs[$section*2-1];
1061                                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
1062                                         $hlevel=$matches[1];
1063
1064                                         # determine headline level for wikimarkup headings
1065                                         if(strpos($hlevel,'=')!==false) {
1066                                                 $hlevel=strlen($hlevel);
1067                                         }
1068
1069                                         $secs[$section*2-1]=''; // erase old headline
1070                                         $count=$section+1;
1071                                         $break=false;
1072                                         while(!empty($secs[$count*2-1]) && !$break) {
1073
1074                                                 $subheadline=$secs[$count*2-1];
1075                                                 preg_match(
1076                                                  '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
1077                                                 $subhlevel=$matches[1];
1078                                                 if(strpos($subhlevel,'=')!==false) {
1079                                                         $subhlevel=strlen($subhlevel);
1080                                                 }
1081                                                 if($subhlevel > $hlevel) {
1082                                                         // erase old subsections
1083                                                         $secs[$count*2-1]='';
1084                                                         $secs[$count*2]='';
1085                                                 }
1086                                                 if($subhlevel <= $hlevel) {
1087                                                         $break=true;
1088                                                 }
1089                                                 $count++;
1090
1091                                         }
1092
1093                                 }
1094                                 $text=join('',$secs);
1095                                 # reinsert the stuff that we stripped out earlier
1096                                 $text=$parser->unstrip($text,$striparray);
1097                                 $text=$parser->unstripNoWiki($text,$striparray);
1098                         }
1099
1100                 }
1101                 return $text;
1102         }
1103
1104         /**
1105          * Change an existing article. Puts the previous version back into the old table, updates RC
1106          * and all necessary caches, mostly via the deferred update array.
1107          *
1108          * It is possible to call this function from a command-line script, but note that you should
1109          * first set $wgUser, and clean up $wgDeferredUpdates after each edit.
1110          */
1111         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
1112                 global $wgOut, $wgUser;
1113                 global $wgDBtransactions, $wgMwRedir;
1114                 global $wgUseSquid, $wgInternalServer, $wgPostCommitUpdateList;
1115
1116                 $fname = 'Article::updateArticle';
1117                 $good = true;
1118
1119                 $isminor = ( $minor && $wgUser->isLoggedIn() );
1120                 if ( $this->isRedirect( $text ) ) {
1121                         # Remove all content but redirect
1122                         # This could be done by reconstructing the redirect from a title given by
1123                         # Title::newFromRedirect(), but then we wouldn't know which synonym the user
1124                         # wants to see
1125                         if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ')[^\\n]+)/i', $text, $m ) ) {
1126                                 $redir = 1;
1127                                 $text = $m[1] . "\n";
1128                         }
1129                 }
1130                 else { $redir = 0; }
1131
1132                 $text = $this->preSaveTransform( $text );
1133                 $dbw =& wfGetDB( DB_MASTER );
1134                 $now = wfTimestampNow();
1135
1136                 # Update article, but only if changed.
1137
1138                 # It's important that we either rollback or complete, otherwise an attacker could
1139                 # overwrite cur entries by sending precisely timed user aborts. Random bored users
1140                 # could conceivably have the same effect, especially if cur is locked for long periods.
1141                 if( !$wgDBtransactions ) {
1142                         $userAbort = ignore_user_abort( true );
1143                 }
1144
1145                 $oldtext = $this->getContent( true );
1146                 $oldsize = strlen( $oldtext );
1147                 $newsize = strlen( $text );
1148                 $lastRevision = 0;
1149
1150                 if ( 0 != strcmp( $text, $oldtext ) ) {
1151                         $this->mGoodAdjustment = $this->isCountable( $text )
1152                           - $this->isCountable( $oldtext );
1153                         $this->mTotalAdjustment = 0;
1154                         $now = wfTimestampNow();
1155
1156                         $lastRevision = $dbw->selectField(
1157                                 'page', 'page_latest', array( 'page_id' => $this->getId() ) );
1158
1159                         $revision = new Revision( array(
1160                                 'page'       => $this->getId(),
1161                                 'comment'    => $summary,
1162                                 'minor_edit' => $isminor,
1163                                 'text'       => $text
1164                                 ) );
1165                         $revisionId = $revision->insertOn( $dbw );
1166
1167                         # Update page
1168                         $ok = $this->updateRevisionOn( $dbw, $revision, $lastRevision );
1169
1170                         if( !$ok ) {
1171                                 /* Belated edit conflict! Run away!! */
1172                                 $good = false;
1173                         } else {
1174                                 # Update recentchanges and purge cache and whatnot
1175                                 $bot = (int)($wgUser->isBot() || $forceBot);
1176                                 RecentChange::notifyEdit( $now, $this->mTitle, $isminor, $wgUser, $summary,
1177                                         $lastRevision, $this->getTimestamp(), $bot, '', $oldsize, $newsize,
1178                                         $revisionId );
1179                                 Article::onArticleEdit( $this->mTitle );
1180                         }
1181                 }
1182
1183                 if( !$wgDBtransactions ) {
1184                         ignore_user_abort( $userAbort );
1185                 }
1186
1187                 if ( $good ) {
1188                         if ($watchthis) {
1189                                 if (!$this->mTitle->userIsWatching()) $this->watch();
1190                         } else {
1191                                 if ( $this->mTitle->userIsWatching() ) {
1192                                         $this->unwatch();
1193                                 }
1194                         }
1195                         # standard deferred updates
1196                         $this->editUpdates( $text, $summary, $minor, $now );
1197
1198
1199                         $urls = array();
1200                         # Template namespace
1201                         # Purge all articles linking here
1202                         if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
1203                                 $titles = $this->mTitle->getLinksTo();
1204                                 Title::touchArray( $titles );
1205                                 if ( $wgUseSquid ) {
1206                                                 foreach ( $titles as $title ) {
1207                                                         $urls[] = $title->getInternalURL();
1208                                                 }
1209                                 }
1210                         }
1211
1212                         # Squid updates
1213                         if ( $wgUseSquid ) {
1214                                 $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
1215                                 $u = new SquidUpdate( $urls );
1216                                 array_push( $wgPostCommitUpdateList, $u );
1217                         }
1218
1219                         $this->showArticle( $text, wfMsg( 'updated' ), $sectionanchor, $isminor, $now, $summary, $lastRevision );
1220                 }
1221                 return $good;
1222         }
1223
1224         /**
1225          * After we've either updated or inserted the article, update
1226          * the link tables and redirect to the new page.
1227          */
1228         function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid ) {
1229                 global $wgUseDumbLinkUpdate, $wgAntiLockFlags, $wgOut, $wgUser, $wgLinkCache, $wgEnotif;
1230                 global $wgUseEnotif;
1231
1232                 $wgLinkCache = new LinkCache();
1233
1234                 if ( !$wgUseDumbLinkUpdate ) {
1235                         # Preload links to reduce lock time
1236                         if ( $wgAntiLockFlags & ALF_PRELOAD_LINKS ) {
1237                                 $wgLinkCache->preFill( $this->mTitle );
1238                                 $wgLinkCache->clear();
1239                         }
1240                 }
1241
1242                 # Parse the text and replace links with placeholders
1243                 $wgOut = new OutputPage();
1244
1245                 # Pass the current title along in case we're creating a wiki page
1246                 # which is different than the currently displayed one (e.g. image
1247                 # pages created on file uploads); otherwise, link updates will
1248                 # go wrong.
1249                 $wgOut->addWikiTextWithTitle( $text, $this->mTitle );
1250
1251                 if ( !$wgUseDumbLinkUpdate ) {
1252                         # Move the current links back to the second register
1253                         $wgLinkCache->swapRegisters();
1254
1255                         # Get old version of link table to allow incremental link updates
1256                         # Lock this data now since it is needed for an update
1257                         $wgLinkCache->forUpdate( true );
1258                         $wgLinkCache->preFill( $this->mTitle );
1259
1260                         # Swap this old version back into its rightful place
1261                         $wgLinkCache->swapRegisters();
1262                 }
1263
1264                 if( $this->isRedirect( $text ) )
1265                         $r = 'redirect=no';
1266                 else
1267                         $r = '';
1268                 $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
1269
1270                 if ( $wgUseEnotif  ) {
1271                         # this would be better as an extension hook
1272                         include_once( "UserMailer.php" );
1273                         $wgEnotif = new EmailNotification ();
1274                         $wgEnotif->notifyOnPageChange( $this->mTitle, $now, $summary, $me2, $oldid );
1275                 }
1276         }
1277
1278         /**
1279          * Mark this particular edit as patrolled
1280          */
1281         function markpatrolled() {
1282                 global $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgUseRCPatrol, $wgUser;
1283                 $wgOut->setRobotpolicy( 'noindex,follow' );
1284
1285                 if ( !$wgUseRCPatrol )
1286                 {
1287                         $wgOut->errorpage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1288                         return;
1289                 }
1290                 if ( $wgUser->isAnon() )
1291                 {
1292                         $wgOut->loginToUse();
1293                         return;
1294                 }
1295                 if ( $wgOnlySysopsCanPatrol && !$wgUser->isAllowed('patrol') )
1296                 {
1297                         $wgOut->sysopRequired();
1298                         return;
1299                 }
1300                 $rcid = $wgRequest->getVal( 'rcid' );
1301                 if ( !is_null ( $rcid ) )
1302                 {
1303                         RecentChange::markPatrolled( $rcid );
1304                         $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
1305                         $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
1306
1307                         $rcTitle = Title::makeTitle( NS_SPECIAL, 'Recentchanges' );
1308                         $wgOut->returnToMain( false, $rcTitle->getPrefixedText() );
1309                 }
1310                 else
1311                 {
1312                         $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1313                 }
1314         }
1315
1316         /**
1317          * Validate function
1318          */
1319         function validate() {
1320                 global $wgOut, $wgUser, $wgRequest, $wgUseValidation;
1321
1322                 if ( !$wgUseValidation ) # Are we using article validation at all?
1323                 {
1324                         $wgOut->errorpage( "nosuchspecialpage", "nospecialpagetext" );
1325                         return ;
1326                 }
1327
1328                 $wgOut->setRobotpolicy( 'noindex,follow' );
1329                 $revision = $wgRequest->getVal( 'revision' );
1330
1331                 include_once ( "SpecialValidate.php" ) ; # The "Validation" class
1332
1333                 $v = new Validation ;
1334                 if ( $wgRequest->getVal ( "mode" , "" ) == "list" )
1335                         $t = $v->showList ( $this ) ;
1336                 else if ( $wgRequest->getVal ( "mode" , "" ) == "details" )
1337                         $t = $v->showDetails ( $this , $wgRequest->getVal( 'revision' ) ) ;
1338                 else
1339                         $t = $v->validatePageForm ( $this , $revision ) ;
1340
1341                 $wgOut->addHTML ( $t ) ;
1342         }
1343
1344         /**
1345          * Add this page to $wgUser's watchlist
1346          */
1347
1348         function watch() {
1349
1350                 global $wgUser, $wgOut;
1351
1352                 if ( $wgUser->isAnon() ) {
1353                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1354                         return;
1355                 }
1356                 if ( wfReadOnly() ) {
1357                         $wgOut->readOnlyPage();
1358                         return;
1359                 }
1360
1361                 if (wfRunHooks('WatchArticle', array(&$wgUser, &$this))) {
1362
1363                         $wgUser->addWatch( $this->mTitle );
1364                         $wgUser->saveSettings();
1365
1366                         wfRunHooks('WatchArticleComplete', array(&$wgUser, &$this));
1367
1368                         $wgOut->setPagetitle( wfMsg( 'addedwatch' ) );
1369                         $wgOut->setRobotpolicy( 'noindex,follow' );
1370
1371                         $link = $this->mTitle->getPrefixedText();
1372                         $text = wfMsg( 'addedwatchtext', $link );
1373                         $wgOut->addWikiText( $text );
1374                 }
1375
1376                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1377         }
1378
1379         /**
1380          * Stop watching a page
1381          */
1382
1383         function unwatch() {
1384
1385                 global $wgUser, $wgOut;
1386
1387                 if ( $wgUser->isAnon() ) {
1388                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1389                         return;
1390                 }
1391                 if ( wfReadOnly() ) {
1392                         $wgOut->readOnlyPage();
1393                         return;
1394                 }
1395
1396                 if (wfRunHooks('UnwatchArticle', array(&$wgUser, &$this))) {
1397
1398                         $wgUser->removeWatch( $this->mTitle );
1399                         $wgUser->saveSettings();
1400
1401                         wfRunHooks('UnwatchArticleComplete', array(&$wgUser, &$this));
1402
1403                         $wgOut->setPagetitle( wfMsg( 'removedwatch' ) );
1404                         $wgOut->setRobotpolicy( 'noindex,follow' );
1405
1406                         $link = $this->mTitle->getPrefixedText();
1407                         $text = wfMsg( 'removedwatchtext', $link );
1408                         $wgOut->addWikiText( $text );
1409                 }
1410
1411                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1412         }
1413
1414         /**
1415          * protect a page
1416          */
1417         function protect( $limit = 'sysop' ) {
1418                 global $wgUser, $wgOut, $wgRequest;
1419
1420                 if ( ! $wgUser->isAllowed('protect') ) {
1421                         $wgOut->sysopRequired();
1422                         return;
1423                 }
1424                 if ( wfReadOnly() ) {
1425                         $wgOut->readOnlyPage();
1426                         return;
1427                 }
1428                 $id = $this->mTitle->getArticleID();
1429                 if ( 0 == $id ) {
1430                         $wgOut->fatalError( wfMsg( 'badarticleerror' ) );
1431                         return;
1432                 }
1433
1434                 $confirm = $wgRequest->wasPosted() &&
1435                         $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
1436                 $moveonly = $wgRequest->getBool( 'wpMoveOnly' );
1437                 $reason = $wgRequest->getText( 'wpReasonProtect' );
1438
1439                 if ( $confirm ) {
1440                         $dbw =& wfGetDB( DB_MASTER );
1441                         $dbw->update( 'page',
1442                                 array( /* SET */
1443                                         'page_touched' => $dbw->timestamp(),
1444                                         'page_restrictions' => (string)$limit
1445                                 ), array( /* WHERE */
1446                                         'page_id' => $id
1447                                 ), 'Article::protect'
1448                         );
1449
1450                         $restrictions = "move=" . $limit;
1451                         if( !$moveonly ) {
1452                                 $restrictions .= ":edit=" . $limit;
1453                         }
1454                         if (wfRunHooks('ArticleProtect', array(&$this, &$wgUser, $limit == 'sysop', $reason, $moveonly))) {
1455
1456                                 $dbw =& wfGetDB( DB_MASTER );
1457                                 $dbw->update( 'page',
1458                                                           array( /* SET */
1459                                                                          'page_touched' => $dbw->timestamp(),
1460                                                                          'page_restrictions' => $restrictions
1461                                                                          ), array( /* WHERE */
1462                                                                                            'page_id' => $id
1463                                                                                            ), 'Article::protect'
1464                                                           );
1465
1466                                 wfRunHooks('ArticleProtectComplete', array(&$this, &$wgUser, $limit == 'sysop', $reason, $moveonly));
1467
1468                                 $log = new LogPage( 'protect' );
1469                                 if ( $limit === '' ) {
1470                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1471                                 } else {
1472                                         $log->addEntry( 'protect', $this->mTitle, $reason );
1473                                 }
1474                                 $wgOut->redirect( $this->mTitle->getFullURL() );
1475                         }
1476                         return;
1477                 } else {
1478                         $reason = htmlspecialchars( wfMsg( 'protectreason' ) );
1479                         return $this->confirmProtect( '', $reason, $limit );
1480                 }
1481         }
1482
1483         /**
1484          * Output protection confirmation dialog
1485          */
1486         function confirmProtect( $par, $reason, $limit = 'sysop'  ) {
1487                 global $wgOut, $wgUser;
1488
1489                 wfDebug( "Article::confirmProtect\n" );
1490
1491                 $sub = $this->mTitle->getPrefixedText();
1492                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1493
1494                 $check = '';
1495                 $protcom = '';
1496                 $moveonly = '';
1497
1498                 if ( $limit === '' ) {
1499                         $wgOut->setPageTitle( wfMsg( 'confirmunprotect' ) );
1500                         $wgOut->setSubtitle( wfMsg( 'unprotectsub', $sub ) );
1501                         $wgOut->addWikiText( wfMsg( 'confirmunprotecttext' ) );
1502                         $protcom = htmlspecialchars( wfMsg( 'unprotectcomment' ) );
1503                         $formaction = $this->mTitle->escapeLocalURL( 'action=unprotect' . $par );
1504                 } else {
1505                         $wgOut->setPageTitle( wfMsg( 'confirmprotect' ) );
1506                         $wgOut->setSubtitle( wfMsg( 'protectsub', $sub ) );
1507                         $wgOut->addWikiText( wfMsg( 'confirmprotecttext' ) );
1508                         $moveonly = htmlspecialchars( wfMsg( 'protectmoveonly' ) );
1509                         $protcom = htmlspecialchars( wfMsg( 'protectcomment' ) );
1510                         $formaction = $this->mTitle->escapeLocalURL( 'action=protect' . $par );
1511                 }
1512
1513                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1514                 $token = htmlspecialchars( $wgUser->editToken() );
1515
1516                 $wgOut->addHTML( "
1517 <form id='protectconfirm' method='post' action=\"{$formaction}\">
1518         <table border='0'>
1519                 <tr>
1520                         <td align='right'>
1521                                 <label for='wpReasonProtect'>{$protcom}:</label>
1522                         </td>
1523                         <td align='left'>
1524                                 <input type='text' size='60' name='wpReasonProtect' id='wpReasonProtect' value=\"" . htmlspecialchars( $reason ) . "\" />
1525                         </td>
1526                 </tr>" );
1527                 if($moveonly != '') {
1528                         $wgOut->AddHTML( "
1529                 <tr>
1530                         <td align='right'>
1531                                 <input type='checkbox' name='wpMoveOnly' value='1' id='wpMoveOnly' />
1532                         </td>
1533                         <td align='left'>
1534                                 <label for='wpMoveOnly'>{$moveonly}</label>
1535                         </td>
1536                 </tr> " );
1537                 }
1538                 $wgOut->addHTML( "
1539                 <tr>
1540                         <td>&nbsp;</td>
1541                         <td>
1542                                 <input type='submit' name='wpConfirmProtectB' value=\"{$confirm}\" />
1543                         </td>
1544                 </tr>
1545         </table>
1546         <input type='hidden' name='wpEditToken' value=\"{$token}\" />
1547 </form>" );
1548
1549                 $wgOut->returnToMain( false );
1550         }
1551
1552         /**
1553          * Unprotect the pages
1554          */
1555         function unprotect() {
1556                 return $this->protect( '' );
1557         }
1558
1559         /*
1560          * UI entry point for page deletion
1561          */
1562         function delete() {
1563                 global $wgUser, $wgOut, $wgMessageCache, $wgRequest;
1564                 $fname = 'Article::delete';
1565                 $confirm = $wgRequest->wasPosted() &&
1566                         $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
1567                 $reason = $wgRequest->getText( 'wpReason' );
1568
1569                 # This code desperately needs to be totally rewritten
1570
1571                 # Check permissions
1572                 if( ( !$wgUser->isAllowed( 'delete' ) ) ) {
1573                         $wgOut->sysopRequired();
1574                         return;
1575                 }
1576                 if( wfReadOnly() ) {
1577                         $wgOut->readOnlyPage();
1578                         return;
1579                 }
1580
1581                 # Better double-check that it hasn't been deleted yet!
1582                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1583                 if( !$this->mTitle->exists() ) {
1584                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1585                         return;
1586                 }
1587
1588                 if( $confirm ) {
1589                         $this->doDelete( $reason );
1590                         return;
1591                 }
1592
1593                 # determine whether this page has earlier revisions
1594                 # and insert a warning if it does
1595                 # we select the text because it might be useful below
1596                 $dbr =& $this->getDB();
1597                 $ns = $this->mTitle->getNamespace();
1598                 $title = $this->mTitle->getDBkey();
1599                 $revisions = $dbr->select( array( 'page', 'revision' ),
1600                         array( 'rev_id', 'rev_user_text' ),
1601                         array(
1602                                 'page_namespace' => $ns,
1603                                 'page_title' => $title,
1604                                 'rev_page = page_id'
1605                         ), $fname, $this->getSelectOptions( array( 'ORDER BY' => 'rev_timestamp DESC' ) )
1606                 );
1607
1608                 if( $dbr->numRows( $revisions ) > 1 && !$confirm ) {
1609                         $skin=$wgUser->getSkin();
1610                         $wgOut->addHTML('<b>'.wfMsg('historywarning'));
1611                         $wgOut->addHTML( $skin->historyLink() .'</b>');
1612                 }
1613
1614                 # Fetch cur_text
1615                 $rev =& Revision::newFromTitle( $this->mTitle );
1616
1617                 # Fetch name(s) of contributors
1618                 $rev_name = '';
1619                 $all_same_user = true;
1620                 while( $row = $dbr->fetchObject( $revisions ) ) {
1621                         if( $rev_name != '' && $rev_name != $row->rev_user_text ) {
1622                                 $all_same_user = false;
1623                         } else {
1624                                 $rev_name = $row->rev_user_text;
1625                         }
1626                 }
1627
1628                 if( !is_null( $rev ) ) {
1629                         # if this is a mini-text, we can paste part of it into the deletion reason
1630                         $text = $rev->getText();
1631
1632                         #if this is empty, an earlier revision may contain "useful" text
1633                         $blanked = false;
1634                         if( $text == '' ) {
1635                                 $prev = $rev->getPrevious();
1636                                 if( $prev ) {
1637                                         $text = $prev->getText();
1638                                         $blanked = true;
1639                                 }
1640                         }
1641
1642                         $length = strlen( $text );
1643
1644                         # this should not happen, since it is not possible to store an empty, new
1645                         # page. Let's insert a standard text in case it does, though
1646                         if( $length == 0 && $reason === '' ) {
1647                                 $reason = wfMsg( 'exblank' );
1648                         }
1649
1650                         if( $length < 500 && $reason === '' ) {
1651                                 # comment field=255, let's grep the first 150 to have some user
1652                                 # space left
1653                                 global $wgContLang;
1654                                 $text = $wgContLang->truncate( $text, 150, '...' );
1655
1656                                 # let's strip out newlines
1657                                 $text = preg_replace( "/[\n\r]/", '', $text );
1658
1659                                 if( !$blanked ) {
1660                                         if( !$all_same_user ) {
1661                                                 $reason = wfMsg( 'excontent', $text );
1662                                         } else {
1663                                                 $reason = wfMsg( 'excontentauthor', $text, $rev_name );
1664                                         }
1665                                 } else {
1666                                         $reason = wfMsg( 'exbeforeblank', $text );
1667                                 }
1668                         }
1669                 }
1670
1671                 return $this->confirmDelete( '', $reason );
1672         }
1673
1674         /**
1675          * Output deletion confirmation dialog
1676          */
1677         function confirmDelete( $par, $reason ) {
1678                 global $wgOut, $wgUser;
1679
1680                 wfDebug( "Article::confirmDelete\n" );
1681
1682                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1683                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1684                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1685                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1686
1687                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1688
1689                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1690                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1691                 $token = htmlspecialchars( $wgUser->editToken() );
1692
1693                 $wgOut->addHTML( "
1694 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1695         <table border='0'>
1696                 <tr>
1697                         <td align='right'>
1698                                 <label for='wpReason'>{$delcom}:</label>
1699                         </td>
1700                         <td align='left'>
1701                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1702                         </td>
1703                 </tr>
1704                 <tr>
1705                         <td>&nbsp;</td>
1706                         <td>
1707                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1708                         </td>
1709                 </tr>
1710         </table>
1711         <input type='hidden' name='wpEditToken' value=\"{$token}\" />
1712 </form>\n" );
1713
1714                 $wgOut->returnToMain( false );
1715         }
1716
1717
1718         /**
1719          * Perform a deletion and output success or failure messages
1720          */
1721         function doDelete( $reason ) {
1722                 global $wgOut, $wgUser, $wgContLang;
1723                 $fname = 'Article::doDelete';
1724                 wfDebug( $fname."\n" );
1725
1726                 if (wfRunHooks('ArticleDelete', array(&$this, &$wgUser, &$reason))) {
1727                         if ( $this->doDeleteArticle( $reason ) ) {
1728                                 $deleted = $this->mTitle->getPrefixedText();
1729
1730                                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1731                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1732
1733                                 $loglink = '[[Special:Log/delete|' . wfMsg( 'deletionlog' ) . ']]';
1734                                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
1735
1736                                 $wgOut->addWikiText( $text );
1737                                 $wgOut->returnToMain( false );
1738                                 wfRunHooks('ArticleDeleteComplete', array(&$this, &$wgUser, $reason));
1739                         } else {
1740                                 $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1741                         }
1742                 }
1743         }
1744
1745         /**
1746          * Back-end article deletion
1747          * Deletes the article with database consistency, writes logs, purges caches
1748          * Returns success
1749          */
1750         function doDeleteArticle( $reason ) {
1751                 global $wgUser;
1752                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer, $wgPostCommitUpdateList;
1753
1754                 $fname = 'Article::doDeleteArticle';
1755                 wfDebug( $fname."\n" );
1756
1757                 $dbw =& wfGetDB( DB_MASTER );
1758                 $ns = $this->mTitle->getNamespace();
1759                 $t = $this->mTitle->getDBkey();
1760                 $id = $this->mTitle->getArticleID();
1761
1762                 if ( $t == '' || $id == 0 ) {
1763                         return false;
1764                 }
1765
1766                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ), -1 );
1767                 array_push( $wgDeferredUpdateList, $u );
1768
1769                 $linksTo = $this->mTitle->getLinksTo();
1770
1771                 # Squid purging
1772                 if ( $wgUseSquid ) {
1773                         $urls = array(
1774                                 $this->mTitle->getInternalURL(),
1775                                 $this->mTitle->getInternalURL( 'history' )
1776                         );
1777
1778                         $u = SquidUpdate::newFromTitles( $linksTo, $urls );
1779                         array_push( $wgPostCommitUpdateList, $u );
1780
1781                 }
1782
1783                 # Client and file cache invalidation
1784                 Title::touchArray( $linksTo );
1785
1786
1787                 // For now, shunt the revision data into the archive table.
1788                 // Text is *not* removed from the text table; bulk storage
1789                 // is left intact to avoid breaking block-compression or
1790                 // immutable storage schemes.
1791                 //
1792                 // For backwards compatibility, note that some older archive
1793                 // table entries will have ar_text and ar_flags fields still.
1794                 //
1795                 // In the future, we may keep revisions and mark them with
1796                 // the rev_deleted field, which is reserved for this purpose.
1797                 $dbw->insertSelect( 'archive', array( 'page', 'revision' ),
1798                         array(
1799                                 'ar_namespace'  => 'page_namespace',
1800                                 'ar_title'      => 'page_title',
1801                                 'ar_comment'    => 'rev_comment',
1802                                 'ar_user'       => 'rev_user',
1803                                 'ar_user_text'  => 'rev_user_text',
1804                                 'ar_timestamp'  => 'rev_timestamp',
1805                                 'ar_minor_edit' => 'rev_minor_edit',
1806                                 'ar_rev_id'     => 'rev_id',
1807                                 'ar_text_id'    => 'rev_text_id',
1808                         ), array(
1809                                 'page_id' => $id,
1810                                 'page_id = rev_page'
1811                         ), $fname
1812                 );
1813
1814                 # Now that it's safely backed up, delete it
1815                 $dbw->delete( 'revision', array( 'rev_page' => $id ), $fname );
1816                 $dbw->delete( 'page', array( 'page_id' => $id ), $fname);
1817
1818                 # Clean up recentchanges entries...
1819                 $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), $fname );
1820
1821                 # Finally, clean up the link tables
1822                 $t = $this->mTitle->getPrefixedDBkey();
1823
1824                 Article::onArticleDelete( $this->mTitle );
1825
1826                 # Delete outgoing links
1827                 $dbw->delete( 'pagelinks', array( 'pl_from' => $id ) );
1828                 $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
1829                 $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
1830
1831                 # Log the deletion
1832                 $log = new LogPage( 'delete' );
1833                 $log->addEntry( 'delete', $this->mTitle, $reason );
1834
1835                 # Clear the cached article id so the interface doesn't act like we exist
1836                 $this->mTitle->resetArticleID( 0 );
1837                 $this->mTitle->mArticleID = 0;
1838                 return true;
1839         }
1840
1841         /**
1842          * Revert a modification
1843          */
1844         function rollback() {
1845                 global $wgUser, $wgOut, $wgRequest;
1846                 $fname = 'Article::rollback';
1847
1848                 if ( ! $wgUser->isAllowed('rollback') ) {
1849                         $wgOut->sysopRequired();
1850                         return;
1851                 }
1852                 if ( wfReadOnly() ) {
1853                         $wgOut->readOnlyPage( $this->getContent( true ) );
1854                         return;
1855                 }
1856                 if( !$wgUser->matchEditToken( $wgRequest->getVal( 'token' ),
1857                         array( $this->mTitle->getPrefixedText(),
1858                                 $wgRequest->getVal( 'from' ) )  ) ) {
1859                         $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
1860                         $wgOut->addWikiText( wfMsg( 'sessionfailure' ) );
1861                         return;
1862                 }
1863                 $dbw =& wfGetDB( DB_MASTER );
1864
1865                 # Enhanced rollback, marks edits rc_bot=1
1866                 $bot = $wgRequest->getBool( 'bot' );
1867
1868                 # Replace all this user's current edits with the next one down
1869                 $tt = $this->mTitle->getDBKey();
1870                 $n = $this->mTitle->getNamespace();
1871
1872                 # Get the last editor, lock table exclusively
1873                 $dbw->begin();
1874                 $current = Revision::newFromTitle( $this->mTitle );
1875                 if( is_null( $current ) ) {
1876                         # Something wrong... no page?
1877                         $dbw->rollback();
1878                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
1879                         return;
1880                 }
1881
1882                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
1883                 if( $from != $current->getUserText() ) {
1884                         $wgOut->setPageTitle(wfmsg('rollbackfailed'));
1885                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
1886                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
1887                                 htmlspecialchars( $from ),
1888                                 htmlspecialchars( $current->getUserText() ) ) );
1889                         if( $current->getComment() != '') {
1890                                 $wgOut->addHTML(
1891                                         wfMsg( 'editcomment',
1892                                         htmlspecialchars( $current->getComment() ) ) );
1893                         }
1894                         return;
1895                 }
1896
1897                 # Get the last edit not by this guy
1898                 $user = IntVal( $current->getUser() );
1899                 $user_text = $dbw->addQuotes( $current->getUserText() );
1900                 $s = $dbw->selectRow( 'revision',
1901                         array( 'rev_id', 'rev_timestamp' ),
1902                         array(
1903                                 'rev_page' => $current->getPage(),
1904                                 "rev_user <> {$user} OR rev_user_text <> {$user_text}"
1905                         ), $fname,
1906                         array(
1907                                 'USE INDEX' => 'page_timestamp',
1908                                 'ORDER BY'  => 'rev_timestamp DESC' )
1909                         );
1910                 if( $s === false ) {
1911                         # Something wrong
1912                         $dbw->rollback();
1913                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
1914                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
1915                         return;
1916                 }
1917
1918                 if ( $bot ) {
1919                         # Mark all reverted edits as bot
1920                         $dbw->update( 'recentchanges',
1921                                 array( /* SET */
1922                                         'rc_bot' => 1
1923                                 ), array( /* WHERE */
1924                                         'rc_cur_id'    => $current->getPage(),
1925                                         'rc_user_text' => $current->getUserText(),
1926                                         "rc_timestamp > '{$s->rev_timestamp}'",
1927                                 ), $fname
1928                         );
1929                 }
1930
1931                 # Save it!
1932                 $target = Revision::newFromId( $s->rev_id );
1933                 $newcomment = wfMsg( 'revertpage', $target->getUserText(), $from );
1934
1935                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1936                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1937                 $wgOut->addHTML( '<h2>' . htmlspecialchars( $newcomment ) . "</h2>\n<hr />\n" );
1938
1939                 $this->updateArticle( $target->getText(), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1940                 Article::onArticleEdit( $this->mTitle );
1941
1942                 $dbw->commit();
1943                 $wgOut->returnToMain( false );
1944         }
1945
1946
1947         /**
1948          * Do standard deferred updates after page view
1949          * @private
1950          */
1951         function viewUpdates() {
1952                 global $wgDeferredUpdateList, $wgUseEnotif;
1953
1954                 if ( 0 != $this->getID() ) {
1955                         global $wgDisableCounters;
1956                         if( !$wgDisableCounters ) {
1957                                 Article::incViewCount( $this->getID() );
1958                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1959                                 array_push( $wgDeferredUpdateList, $u );
1960                         }
1961                 }
1962
1963                 # Update newtalk status if user is reading their own
1964                 # talk page
1965
1966                 global $wgUser;
1967                 if ($this->mTitle->getNamespace() == NS_USER_TALK &&
1968                         $this->mTitle->getText() == $wgUser->getName())
1969                 {
1970                         if ( $wgUseEnotif ) {
1971                                 require_once( 'UserTalkUpdate.php' );
1972                                 $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(), $this->mTitle->getDBkey(), false, false, false );
1973                         } else {
1974                                 $wgUser->setNewtalk(0);
1975                                 $wgUser->saveNewtalk();
1976                         }
1977                 } elseif ( $wgUseEnotif ) {
1978                         $wgUser->clearNotification( $this->mTitle );
1979                 }
1980
1981         }
1982
1983         /**
1984          * Do standard deferred updates after page edit.
1985          * Every 1000th edit, prune the recent changes table.
1986          * @private
1987          * @param string $text
1988          */
1989         function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange) {
1990                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1991                 global $wgMessageCache, $wgUser, $wgUseEnotif;
1992
1993                 wfSeedRandom();
1994                 if ( 0 == mt_rand( 0, 999 ) ) {
1995                         # Periodically flush old entries from the recentchanges table.
1996                         global $wgRCMaxAge;
1997                         $dbw =& wfGetDB( DB_MASTER );
1998                         $cutoff = $dbw->timestamp( time() - $wgRCMaxAge );
1999                         $recentchanges = $dbw->tableName( 'recentchanges' );
2000                         $sql = "DELETE FROM $recentchanges WHERE rc_timestamp < '{$cutoff}'";
2001                         $dbw->query( $sql );
2002                 }
2003                 $id = $this->getID();
2004                 $title = $this->mTitle->getPrefixedDBkey();
2005                 $shortTitle = $this->mTitle->getDBkey();
2006
2007                 if ( 0 != $id ) {
2008                         $u = new LinksUpdate( $id, $title );
2009                         array_push( $wgDeferredUpdateList, $u );
2010                         $u = new SiteStatsUpdate( 0, 1, $this->mGoodAdjustment, $this->mTotalAdjustment );
2011                         array_push( $wgDeferredUpdateList, $u );
2012                         $u = new SearchUpdate( $id, $title, $text );
2013                         array_push( $wgDeferredUpdateList, $u );
2014
2015                         # If this is another user's talk page, update newtalk
2016
2017                         if ($this->mTitle->getNamespace() == NS_USER_TALK && $shortTitle != $wgUser->getName()) {
2018                                 if ( $wgUseEnotif ) {
2019                                         require_once( 'UserTalkUpdate.php' );
2020                                         $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle, $summary,
2021                                           $minoredit, $timestamp_of_pagechange);
2022                                 } else {
2023                                         $other = User::newFromName( $shortTitle );
2024                                         if( is_null( $other ) && User::isIP( $shortTitle ) ) {
2025                                                 // An anonymous user
2026                                                 $other = new User();
2027                                                 $other->setName( $shortTitle );
2028                                         }
2029                                         if( $other ) {
2030                                                 $other->setNewtalk(1);
2031                                                 $other->saveNewtalk();
2032                                         }
2033                                 }
2034                         }
2035
2036                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
2037                                 $wgMessageCache->replace( $shortTitle, $text );
2038                         }
2039                 }
2040         }
2041
2042         /**
2043          * @todo document this function
2044          * @private
2045          * @param string $oldid         Revision ID of this article revision
2046          */
2047         function setOldSubtitle( $oldid=0 ) {
2048                 global $wgLang, $wgOut, $wgUser;
2049
2050                 $current = ( $oldid == $this->mLatest );
2051                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
2052                 $sk = $wgUser->getSkin();
2053                 $lnk = $current
2054                         ? wfMsg( 'currentrevisionlink' )
2055                         : $lnk = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
2056                 $prevlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid );
2057                 $nextlink = $current
2058                         ? wfMsg( 'nextrevision' )
2059                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
2060                 $r = wfMsg( 'revisionasofwithlink', $td, $lnk, $prevlink, $nextlink );
2061                 $wgOut->setSubtitle( $r );
2062         }
2063
2064         /**
2065          * This function is called right before saving the wikitext,
2066          * so we can do things like signatures and links-in-context.
2067          *
2068          * @param string $text
2069          */
2070         function preSaveTransform( $text ) {
2071                 global $wgParser, $wgUser;
2072                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
2073         }
2074
2075         /* Caching functions */
2076
2077         /**
2078          * checkLastModified returns true if it has taken care of all
2079          * output to the client that is necessary for this request.
2080          * (that is, it has sent a cached version of the page)
2081          */
2082         function tryFileCache() {
2083                 static $called = false;
2084                 if( $called ) {
2085                         wfDebug( " tryFileCache() -- called twice!?\n" );
2086                         return;
2087                 }
2088                 $called = true;
2089                 if($this->isFileCacheable()) {
2090                         $touched = $this->mTouched;
2091                         $cache = new CacheManager( $this->mTitle );
2092                         if($cache->isFileCacheGood( $touched )) {
2093                                 global $wgOut;
2094                                 wfDebug( " tryFileCache() - about to load\n" );
2095                                 $cache->loadFromFileCache();
2096                                 return true;
2097                         } else {
2098                                 wfDebug( " tryFileCache() - starting buffer\n" );
2099                                 ob_start( array(&$cache, 'saveToFileCache' ) );
2100                         }
2101                 } else {
2102                         wfDebug( " tryFileCache() - not cacheable\n" );
2103                 }
2104         }
2105
2106         /**
2107          * Check if the page can be cached
2108          * @return bool
2109          */
2110         function isFileCacheable() {
2111                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
2112                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
2113
2114                 return $wgUseFileCache
2115                         and (!$wgShowIPinHeader)
2116                         and ($this->getID() != 0)
2117                         and ($wgUser->isAnon())
2118                         and (!$wgUser->getNewtalk())
2119                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
2120                         and (empty( $action ) || $action == 'view')
2121                         and (!isset($oldid))
2122                         and (!isset($diff))
2123                         and (!isset($redirect))
2124                         and (!isset($printable))
2125                         and (!$this->mRedirectedFrom);
2126         }
2127
2128         /**
2129          * Loads cur_touched and returns a value indicating if it should be used
2130          *
2131          */
2132         function checkTouched() {
2133                 $fname = 'Article::checkTouched';
2134                 if( !$this->mDataLoaded ) {
2135                         $dbr =& $this->getDB();
2136                         $data = $this->pageDataFromId( $dbr, $this->getId() );
2137                         if( $data ) {
2138                                 $this->loadPageData( $data );
2139                         }
2140                 }
2141                 return !$this->mIsRedirect;
2142         }
2143
2144         /**
2145          * Edit an article without doing all that other stuff
2146          * The article must already exist; link tables etc
2147          * are not updated, caches are not flushed.
2148          *
2149          * @param string $text text submitted
2150          * @param string $comment comment submitted
2151          * @param bool $minor whereas it's a minor modification
2152          */
2153         function quickEdit( $text, $comment = '', $minor = 0 ) {
2154                 $fname = 'Article::quickEdit';
2155                 wfProfileIn( $fname );
2156
2157                 $dbw =& wfGetDB( DB_MASTER );
2158                 $dbw->begin();
2159                 $revision = new Revision( array(
2160                         'page'       => $this->getId(),
2161                         'text'       => $text,
2162                         'comment'    => $comment,
2163                         'minor_edit' => $minor ? 1 : 0,
2164                         ) );
2165                 $revisionId = $revision->insertOn( $dbw );
2166                 $this->updateRevisionOn( $dbw, $revision );
2167                 $dbw->commit();
2168
2169                 wfProfileOut( $fname );
2170         }
2171
2172         /**
2173          * Used to increment the view counter
2174          *
2175          * @static
2176          * @param integer $id article id
2177          */
2178         function incViewCount( $id ) {
2179                 $id = intval( $id );
2180                 global $wgHitcounterUpdateFreq;
2181
2182                 $dbw =& wfGetDB( DB_MASTER );
2183                 $pageTable = $dbw->tableName( 'page' );
2184                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
2185                 $acchitsTable = $dbw->tableName( 'acchits' );
2186
2187                 if( $wgHitcounterUpdateFreq <= 1 ){ //
2188                         $dbw->query( "UPDATE $pageTable SET page_counter = page_counter + 1 WHERE page_id = $id" );
2189                         return;
2190                 }
2191
2192                 # Not important enough to warrant an error page in case of failure
2193                 $oldignore = $dbw->ignoreErrors( true );
2194
2195                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2196
2197                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2198                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2199                         # Most of the time (or on SQL errors), skip row count check
2200                         $dbw->ignoreErrors( $oldignore );
2201                         return;
2202                 }
2203
2204                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2205                 $row = $dbw->fetchObject( $res );
2206                 $rown = intval( $row->n );
2207                 if( $rown >= $wgHitcounterUpdateFreq ){
2208                         wfProfileIn( 'Article::incViewCount-collect' );
2209                         $old_user_abort = ignore_user_abort( true );
2210
2211                         $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2212                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable TYPE=HEAP ".
2213                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2214                                 'GROUP BY hc_id');
2215                         $dbw->query("DELETE FROM $hitcounterTable");
2216                         $dbw->query('UNLOCK TABLES');
2217                         $dbw->query("UPDATE $pageTable,$acchitsTable SET page_counter=page_counter + hc_n ".
2218                                 'WHERE page_id = hc_id');
2219                         $dbw->query("DROP TABLE $acchitsTable");
2220
2221                         ignore_user_abort( $old_user_abort );
2222                         wfProfileOut( 'Article::incViewCount-collect' );
2223                 }
2224                 $dbw->ignoreErrors( $oldignore );
2225         }
2226
2227         /**#@+
2228          * The onArticle*() functions are supposed to be a kind of hooks
2229          * which should be called whenever any of the specified actions
2230          * are done.
2231          *
2232          * This is a good place to put code to clear caches, for instance.
2233          *
2234          * This is called on page move and undelete, as well as edit
2235          * @static
2236          * @param $title_obj a title object
2237          */
2238
2239         function onArticleCreate($title_obj) {
2240                 global $wgUseSquid, $wgPostCommitUpdateList;
2241
2242                 $title_obj->touchLinks();
2243                 $titles = $title_obj->getLinksTo();
2244
2245                 # Purge squid
2246                 if ( $wgUseSquid ) {
2247                         $urls = $title_obj->getSquidURLs();
2248                         foreach ( $titles as $linkTitle ) {
2249                                 $urls[] = $linkTitle->getInternalURL();
2250                         }
2251                         $u = new SquidUpdate( $urls );
2252                         array_push( $wgPostCommitUpdateList, $u );
2253                 }
2254         }
2255
2256         function onArticleDelete($title_obj) {
2257                 $title_obj->touchLinks();
2258         }
2259
2260         function onArticleEdit($title_obj) {
2261                 // This would be an appropriate place to purge caches.
2262                 // Why's this not in here now?
2263         }
2264
2265         /**#@-*/
2266
2267         /**
2268          * Info about this page
2269          * Called for ?action=info when $wgAllowPageInfo is on.
2270          *
2271          * @access public
2272          */
2273         function info() {
2274                 global $wgLang, $wgOut, $wgAllowPageInfo;
2275                 $fname = 'Article::info';
2276
2277                 if ( !$wgAllowPageInfo ) {
2278                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
2279                         return;
2280                 }
2281
2282                 $page = $this->mTitle->getSubjectPage();
2283
2284                 $wgOut->setPagetitle( $page->getPrefixedText() );
2285                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
2286
2287                 # first, see if the page exists at all.
2288                 $exists = $page->getArticleId() != 0;
2289                 if( !$exists ) {
2290                         $wgOut->addHTML( wfMsg('noarticletext') );
2291                 } else {
2292                         $dbr =& $this->getDB( DB_SLAVE );
2293                         $wl_clause = array(
2294                                 'wl_title'     => $page->getDBkey(),
2295                                 'wl_namespace' => $page->getNamespace() );
2296                         $numwatchers = $dbr->selectField(
2297                                 'watchlist',
2298                                 'COUNT(*)',
2299                                 $wl_clause,
2300                                 $fname,
2301                                 $this->getSelectOptions() );
2302
2303                         $pageInfo = $this->pageCountInfo( $page );
2304                         $talkInfo = $this->pageCountInfo( $page->getTalkPage() );
2305
2306                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $wgLang->formatNum( $numwatchers ) ) . '</li>' );
2307                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $wgLang->formatNum( $pageInfo['edits'] ) ) . '</li>');
2308                         if( $talkInfo ) {
2309                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $wgLang->formatNum( $talkInfo['edits'] ) ) . '</li>');
2310                         }
2311                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $wgLang->formatNum( $pageInfo['authors'] ) ) . '</li>' );
2312                         if( $talkInfo ) {
2313                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $wgLang->formatNum( $talkInfo['authors'] ) ) . '</li>' );
2314                         }
2315                         $wgOut->addHTML( '</ul>' );
2316
2317                 }
2318         }
2319
2320         /**
2321          * Return the total number of edits and number of unique editors
2322          * on a given page. If page does not exist, returns false.
2323          *
2324          * @param Title $title
2325          * @return array
2326          * @access private
2327          */
2328         function pageCountInfo( $title ) {
2329                 $id = $title->getArticleId();
2330                 if( $id == 0 ) {
2331                         return false;
2332                 }
2333
2334                 $dbr =& $this->getDB( DB_SLAVE );
2335
2336                 $rev_clause = array( 'rev_page' => $id );
2337                 $fname = 'Article::pageCountInfo';
2338
2339                 $edits = $dbr->selectField(
2340                         'revision',
2341                         'COUNT(rev_page)',
2342                         $rev_clause,
2343                         $fname,
2344                         $this->getSelectOptions() );
2345
2346                 $authors = $dbr->selectField(
2347                         'revision',
2348                         'COUNT(DISTINCT rev_user_text)',
2349                         $rev_clause,
2350                         $fname,
2351                         $this->getSelectOptions() );
2352
2353                 return array( 'edits' => $edits, 'authors' => $authors );
2354         }
2355
2356         /**
2357          * Return a list of templates used by this article.
2358          * Uses the links table to find the templates
2359          *
2360          * @return array
2361          */
2362         function getUsedTemplates() {
2363                 $result = array();
2364                 $id = $this->mTitle->getArticleID();
2365
2366                 $db =& wfGetDB( DB_SLAVE );
2367                 $res = $db->select( array( 'pagelinks' ),
2368                         array( 'pl_title' ),
2369                         array(
2370                                 'pl_from' => $id,
2371                                 'pl_namespace' => NS_TEMPLATE ),
2372                         'Article:getUsedTemplates' );
2373                 if ( false !== $res ) {
2374                         if ( $db->numRows( $res ) ) {
2375                                 while ( $row = $db->fetchObject( $res ) ) {
2376                                         $result[] = $row->pl_title;
2377                                 }
2378                         }
2379                 }
2380                 $db->freeResult( $res );
2381                 return $result;
2382         }
2383
2384
2385 }
2386
2387
2388 ?>