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