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