includes/Article.php

   1 <?php
   2 /**
   3  * File for articles
   4  * @package MediaWiki
   5  */
   6
   7 /**
   8  * Need the CacheManager to be loaded
   9  */
  10 require_once( 'CacheManager.php' );
  11 require_once( 'Revision.php' );
  12
  13 $wgArticleCurContentFields = false;
  14 $wgArticleOldContentFields = false;
  15
  16 /**
  17  * Class representing a MediaWiki article and history.
  18  *
  19  * See design.txt for an overview.
  20  * Note: edit user interface and cache support functions have been
  21  * moved to separate EditPage and CacheManager classes.
  22  *
  23  * @package MediaWiki
  24  */
  25 class Article {
  26         /**#@+
  27          * @access private
  28          */
  29         var $mContent, $mContentLoaded;
  30         var $mUser, $mTimestamp, $mUserText;
  31         var $mCounter, $mComment, $mGoodAdjustment, $mTotalAdjustment;
  32         var $mMinorEdit, $mRedirectedFrom;
  33         var $mTouched, $mFileCache, $mTitle;
  34         var $mId, $mTable;
  35         var $mForUpdate;
  36         var $mOldId;
  37         var $mRevIdFetched;
  38         var $mRevision;
  39         /**#@-*/
  40
  41         /**
  42          * Constructor and clear the article
  43          * @param mixed &$title
  44          */
  45         function Article( &$title ) {
  46                 $this->mTitle =& $title;
  47                 $this->clear();
  48         }
  49
  50         /**
  51          * get the title object of the article
  52          * @public
  53          */
  54         function getTitle() {
  55                 return $this->mTitle;
  56         }
  57
  58         /**
  59           * Clear the object
  60           * @private
  61           */
  62         function clear() {
  63                 $this->mDataLoaded    = false;
  64                 $this->mContentLoaded = false;
  65
  66                 $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
  67                 $this->mRedirectedFrom = $this->mUserText =
  68                 $this->mTimestamp = $this->mComment = $this->mFileCache = '';
  69                 $this->mGoodAdjustment = $this->mTotalAdjustment = 0;
  70                 $this->mTouched = '19700101000000';
  71                 $this->mForUpdate = false;
  72                 $this->mIsRedirect = false;
  73                 $this->mRevIdFetched = 0;
  74         }
  75
  76         /**
  77          * Note that getContent/loadContent may follow redirects if
  78          * not told otherwise, and so may cause a change to mTitle.
  79          *
  80          * @param $noredir
  81          * @return Return the text of this revision
  82         */
  83         function getContent( $noredir ) {
  84                 global $wgRequest, $wgUser, $wgOut;
  85
  86                 # Get variables from query string :P
  87                 $action = $wgRequest->getText( 'action', 'view' );
  88                 $section = $wgRequest->getText( 'section' );
  89                 $preload = $wgRequest->getText( 'preload' );
  90
  91                 $fname =  'Article::getContent';
  92                 wfProfileIn( $fname );
  93
  94                 if ( 0 == $this->getID() ) {
  95                         if ( 'edit' == $action ) {
  96                                 wfProfileOut( $fname );
  97
  98                                 # If requested, preload some text.
  99                                 $text=$this->getPreloadedText($preload);
 100
 101                                 # We used to put MediaWiki:Newarticletext here if
 102                                 # $text was empty at this point.
 103                                 # This is now shown above the edit box instead.
 104                                 return $text;
 105                         }
 106                         wfProfileOut( $fname );
 107                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
 108
 109                         $ret = wfMsg( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon' );
 110                         return "<div class='noarticletext'>$ret</div>";
 111                 } else {
 112                         $this->loadContent( $noredir );
 113                         # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 114                         if ( $this->mTitle->getNamespace() == NS_USER_TALK &&
 115                           $wgUser->isIP($this->mTitle->getText()) &&
 116                           $action=='view'
 117                         ) {
 118                                 wfProfileOut( $fname );
 119                                 return $this->mContent . "\n" .wfMsg('anontalkpagetext');
 120                         } else {
 121                                 if($action=='edit') {
 122                                         if($section!='') {
 123                                                 if($section=='new') {
 124                                                         wfProfileOut( $fname );
 125                                                         $text=$this->getPreloadedText($preload);
 126                                                         return $text;
 127                                                 }
 128
 129                                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 130                                                 # comments to be stripped as well)
 131                                                 $rv=$this->getSection($this->mContent,$section);
 132                                                 wfProfileOut( $fname );
 133                                                 return $rv;
 134                                         }
 135                                 }
 136                                 wfProfileOut( $fname );
 137                                 return $this->mContent;
 138                         }
 139                 }
 140         }
 141
 142         /**
 143                 This function accepts a title string as parameter
 144                 ($preload). If this string is non-empty, it attempts
 145                 to fetch the current revision text. It respects
 146                 <includeonly>.
 147         */
 148         function getPreloadedText($preload) {
 149                 if($preload) {
 150                         $preloadTitle=Title::newFromText($preload);
 151                         if(isset($preloadTitle) && $preloadTitle->userCanRead()) {
 152                         $rev=Revision::newFromTitle($preloadTitle);
 153                         if($rev) {
 154                                 $text=$rev->getText();
 155                                 $text=preg_replace('/<\/?includeonly>/i','',$text);
 156                                 return $text;
 157                                 }
 158                         }
 159                 }
 160                 return '';
 161         }
 162
 163         /**
 164          * This function returns the text of a section, specified by a number ($section).
 165          * A section is text under a heading like == Heading == or <h1>Heading</h1>, or
 166          * the first section before any such heading (section 0).
 167          *
 168          * If a section contains subsections, these are also returned.
 169          *
 170          * @param string $text text to look in
 171          * @param integer $section section number
 172          * @return string text of the requested section
 173          */
 174         function getSection($text,$section) {
 175
 176                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 177                 # comments to be stripped as well)
 178                 $striparray=array();
 179                 $parser=new Parser();
 180                 $parser->mOutputType=OT_WIKI;
 181                 $parser->mOptions = new ParserOptions();
 182                 $striptext=$parser->strip($text, $striparray, true);
 183
 184                 # now that we can be sure that no pseudo-sections are in the source,
 185                 # split it up by section
 186                 $secs =
 187                   preg_split(
 188                   '/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 189                   $striptext, -1,
 190                   PREG_SPLIT_DELIM_CAPTURE);
 191                 if($section==0) {
 192                         $rv=$secs[0];
 193                 } else {
 194                         $headline=$secs[$section*2-1];
 195                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 196                         $hlevel=$matches[1];
 197
 198                         # translate wiki heading into level
 199                         if(strpos($hlevel,'=')!==false) {
 200                                 $hlevel=strlen($hlevel);
 201                         }
 202
 203                         $rv=$headline. $secs[$section*2];
 204                         $count=$section+1;
 205
 206                         $break=false;
 207                         while(!empty($secs[$count*2-1]) && !$break) {
 208
 209                                 $subheadline=$secs[$count*2-1];
 210                                 preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 211                                 $subhlevel=$matches[1];
 212                                 if(strpos($subhlevel,'=')!==false) {
 213                                         $subhlevel=strlen($subhlevel);
 214                                 }
 215                                 if($subhlevel > $hlevel) {
 216                                         $rv.=$subheadline.$secs[$count*2];
 217                                 }
 218                                 if($subhlevel <= $hlevel) {
 219                                         $break=true;
 220                                 }
 221                                 $count++;
 222
 223                         }
 224                 }
 225                 # reinsert stripped tags
 226                 $rv=$parser->unstrip($rv,$striparray);
 227                 $rv=$parser->unstripNoWiki($rv,$striparray);
 228                 $rv=trim($rv);
 229                 return $rv;
 230
 231         }
 232
 233         /**
 234          * Return the oldid of the article that is to be shown.
 235          * For requests with a "direction", this is not the oldid of the
 236          * query
 237          */
 238         function getOldID() {
 239                 global $wgRequest, $wgOut;
 240                 static $lastid;
 241
 242                 if ( isset( $lastid ) ) {
 243                         return $lastid;
 244                 }
 245                 # Query variables :P
 246                 $oldid = $wgRequest->getVal( 'oldid' );
 247                 if ( isset( $oldid ) ) {
 248                         $oldid = intval( $oldid );
 249                         if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 250                                 $nextid = $this->mTitle->getNextRevisionID( $oldid );
 251                                 if ( $nextid  ) {
 252                                         $oldid = $nextid;
 253                                 } else {
 254                                         $wgOut->redirect( $this->mTitle->getFullURL( 'redirect=no' ) );
 255                                 }
 256                         } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 257                                 $previd = $this->mTitle->getPreviousRevisionID( $oldid );
 258                                 if ( $previd ) {
 259                                         $oldid = $previd;
 260                                 } else {
 261                                         # TODO
 262                                 }
 263                         }
 264                         $lastid = $oldid;
 265                 }
 266                 return @$oldid; # "@" to be able to return "unset" without PHP complaining
 267         }
 268
 269
 270         /**
 271          * Load the revision (including cur_text) into this object
 272          */
 273         function loadContent( $noredir = false ) {
 274                 global $wgOut, $wgRequest;
 275
 276                 if ( $this->mContentLoaded ) return;
 277
 278                 # Query variables :P
 279                 $oldid = $this->getOldID();
 280                 $redirect = $wgRequest->getVal( 'redirect' );
 281
 282                 $fname = 'Article::loadContent';
 283
 284                 # Pre-fill content with error message so that if something
 285                 # fails we'll have something telling us what we intended.
 286
 287                 $t = $this->mTitle->getPrefixedText();
 288
 289                 $noredir = $noredir || ($wgRequest->getVal( 'redirect' ) == 'no')
 290                         || $wgRequest->getCheck( 'rdfrom' );
 291                 $this->mOldId = $oldid;
 292                 $this->fetchContent( $oldid, $noredir, true );
 293         }
 294
 295
 296         /**
 297          * Fetch a page record with the given conditions
 298          * @param Database $dbr
 299          * @param array    $conditions
 300          * @access private
 301          */
 302         function pageData( &$dbr, $conditions ) {
 303                 return $dbr->selectRow( 'page',
 304                         array(
 305                                 'page_id',
 306                                 'page_namespace',
 307                                 'page_title',
 308                                 'page_restrictions',
 309                                 'page_counter',
 310                                 'page_is_redirect',
 311                                 'page_is_new',
 312                                 'page_random',
 313                                 'page_touched',
 314                                 'page_latest',
 315                                 'page_len' ),
 316                         $conditions,
 317                         'Article::pageData' );
 318         }
 319
 320         function pageDataFromTitle( &$dbr, $title ) {
 321                 return $this->pageData( $dbr, array(
 322                         'page_namespace' => $title->getNamespace(),
 323                         'page_title'     => $title->getDBkey() ) );
 324         }
 325
 326         function pageDataFromId( &$dbr, $id ) {
 327                 return $this->pageData( $dbr, array(
 328                         'page_id' => intval( $id ) ) );
 329         }
 330
 331         /**
 332          * Set the general counter, title etc data loaded from
 333          * some source.
 334          *
 335          * @param object $data
 336          * @access private
 337          */
 338         function loadPageData( $data ) {
 339                 $this->mTitle->loadRestrictions( $data->page_restrictions );
 340                 $this->mTitle->mRestrictionsLoaded = true;
 341
 342                 $this->mCounter    = $data->page_counter;
 343                 $this->mTouched    = wfTimestamp( TS_MW, $data->page_touched );
 344                 $this->mIsRedirect = $data->page_is_redirect;
 345                 $this->mLatest     = $data->page_latest;
 346
 347                 $this->mDataLoaded = true;
 348         }
 349
 350         /**
 351          * Get text of an article from database
 352          * @param int $oldid 0 for whatever the latest revision is
 353          * @param bool $noredir Set to false to follow redirects
 354          * @param bool $globalTitle Set to true to change the global $wgTitle object when following redirects or other unexpected title changes
 355          * @return string
 356          */
 357         function fetchContent( $oldid = 0, $noredir = true, $globalTitle = false ) {
 358                 if ( $this->mContentLoaded ) {
 359                         return $this->mContent;
 360                 }
 361                 $dbr =& $this->getDB();
 362                 $fname = 'Article::fetchContent';
 363
 364                 # Pre-fill content with error message so that if something
 365                 # fails we'll have something telling us what we intended.
 366                 $t = $this->mTitle->getPrefixedText();
 367                 if( $oldid ) {
 368                         $t .= ',oldid='.$oldid;
 369                 }
 370                 if( isset( $redirect ) ) {
 371                         $redirect = ($redirect == 'no') ? 'no' : 'yes';
 372                         $t .= ',redirect='.$redirect;
 373                 }
 374                 $this->mContent = wfMsg( 'missingarticle', $t );
 375
 376                 if( $oldid ) {
 377                         $revision = Revision::newFromId( $oldid );
 378                         if( is_null( $revision ) ) {
 379                                 wfDebug( "$fname failed to retrieve specified revision, id $oldid\n" );
 380                                 return false;
 381                         }
 382                         $data = $this->pageDataFromId( $dbr, $revision->getPage() );
 383                         if( !$data ) {
 384                                 wfDebug( "$fname failed to get page data linked to revision id $oldid\n" );
 385                                 return false;
 386                         }
 387                         $this->mTitle = Title::makeTitle( $data->page_namespace, $data->page_title );
 388                         $this->loadPageData( $data );
 389                 } else {
 390                         if( !$this->mDataLoaded ) {
 391                                 $data = $this->pageDataFromTitle( $dbr, $this->mTitle );
 392                                 if( !$data ) {
 393                                         wfDebug( "$fname failed to find page data for title " . $this->mTitle->getPrefixedText() . "\n" );
 394                                         return false;
 395                                 }
 396                                 $this->loadPageData( $data );
 397                         }
 398                         $revision = Revision::newFromId( $this->mLatest );
 399                         if( is_null( $revision ) ) {
 400                                 wfDebug( "$fname failed to retrieve current page, rev_id $data->page_latest\n" );
 401                                 return false;
 402                         }
 403                 }
 404
 405                 # If we got a redirect, follow it (unless we've been told
 406                 # not to by either the function parameter or the query
 407                 if ( !$oldid && !$noredir ) {
 408                         $rt = Title::newFromRedirect( $revision->getText() );
 409                         # process if title object is valid and not special:userlogout
 410                         if ( $rt && ! ( $rt->getNamespace() == NS_SPECIAL && $rt->getText() == 'Userlogout' ) ) {
 411                                 # Gotta hand redirects to special pages differently:
 412                                 # Fill the HTTP response "Location" header and ignore
 413                                 # the rest of the page we're on.
 414                                 global $wgDisableHardRedirects;
 415                                 if( $globalTitle && !$wgDisableHardRedirects ) {
 416                                         global $wgOut;
 417                                         if ( $rt->getInterwiki() != '' && $rt->isLocal() ) {
 418                                                 $source = $this->mTitle->getFullURL( 'redirect=no' );
 419                                                 $wgOut->redirect( $rt->getFullURL( 'rdfrom=' . urlencode( $source ) ) ) ;
 420                                                 return false;
 421                                         }
 422                                         if ( $rt->getNamespace() == NS_SPECIAL ) {
 423                                                 $wgOut->redirect( $rt->getFullURL() );
 424                                                 return false;
 425                                         }
 426                                 }
 427                                 if( $rt->getInterwiki() == '' ) {
 428                                         $redirData = $this->pageDataFromTitle( $dbr, $rt );
 429                                         if( $redirData ) {
 430                                                 $redirRev = Revision::newFromId( $redirData->page_latest );
 431                                                 if( !is_null( $redirRev ) ) {
 432                                                         $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 433                                                         $this->mTitle = $rt;
 434                                                         $data = $redirData;
 435                                                         $this->loadPageData( $data );
 436                                                         $revision = $redirRev;
 437                                                 }
 438                                         }
 439                                 }
 440                         }
 441                 }
 442
 443                 # if the title's different from expected, update...
 444                 if( $globalTitle ) {
 445                         global $wgTitle;
 446                         if( !$this->mTitle->equals( $wgTitle ) ) {
 447                                 $wgTitle = $this->mTitle;
 448                         }
 449                 }
 450
 451                 # Back to the business at hand...
 452                 $this->mContent   = $revision->getText();
 453
 454                 $this->mUser      = $revision->getUser();
 455                 $this->mUserText  = $revision->getUserText();
 456                 $this->mComment   = $revision->getComment();
 457                 $this->mTimestamp = wfTimestamp( TS_MW, $revision->getTimestamp() );
 458
 459                 $this->mRevIdFetched = $revision->getID();
 460                 $this->mContentLoaded = true;
 461                 $this->mRevision =& $revision;
 462
 463                 return $this->mContent;
 464         }
 465
 466         /**
 467          * Gets the article text without using so many damn globals
 468          * Returns false on error
 469          *
 470          * @param integer $oldid
 471          */
 472         function getContentWithoutUsingSoManyDamnGlobals( $oldid = 0, $noredir = false ) {
 473                 return $this->fetchContent( $oldid, $noredir, false );
 474         }
 475
 476         /**
 477          * Read/write accessor to select FOR UPDATE
 478          */
 479         function forUpdate( $x = NULL ) {
 480                 return wfSetVar( $this->mForUpdate, $x );
 481         }
 482
 483         /**
 484          * Get the database which should be used for reads
 485          */
 486         function &getDB() {
 487                 $ret =& wfGetDB( DB_MASTER );
 488                 return $ret;
 489                 #if ( $this->mForUpdate ) {
 490                         $ret =& wfGetDB( DB_MASTER );
 491                 #} else {
 492                 #       $ret =& wfGetDB( DB_SLAVE );
 493                 #}
 494                 return $ret;
 495         }
 496
 497         /**
 498          * Get options for all SELECT statements
 499          * Can pass an option array, to which the class-wide options will be appended
 500          */
 501         function getSelectOptions( $options = '' ) {
 502                 if ( $this->mForUpdate ) {
 503                         if ( is_array( $options ) ) {
 504                                 $options[] = 'FOR UPDATE';
 505                         } else {
 506                                 $options = 'FOR UPDATE';
 507                         }
 508                 }
 509                 return $options;
 510         }
 511
 512         /**
 513          * Return the Article ID
 514          */
 515         function getID() {
 516                 if( $this->mTitle ) {
 517                         return $this->mTitle->getArticleID();
 518                 } else {
 519                         return 0;
 520                 }
 521         }
 522
 523         /**
 524          * Returns true if this article exists in the database.
 525          * @return bool
 526          */
 527         function exists() {
 528                 return $this->getId() != 0;
 529         }
 530
 531         /**
 532          * Get the view count for this article
 533          */
 534         function getCount() {
 535                 if ( -1 == $this->mCounter ) {
 536                         $id = $this->getID();
 537                         $dbr =& $this->getDB();
 538                         $this->mCounter = $dbr->selectField( 'page', 'page_counter', array( 'page_id' => $id ),
 539                                 'Article::getCount', $this->getSelectOptions() );
 540                 }
 541                 return $this->mCounter;
 542         }
 543
 544         /**
 545          * Would the given text make this article a "good" article (i.e.,
 546          * suitable for including in the article count)?
 547          * @param string $text Text to analyze
 548          * @return integer 1 if it can be counted else 0
 549          */
 550         function isCountable( $text ) {
 551                 global $wgUseCommaCount;
 552
 553                 if ( NS_MAIN != $this->mTitle->getNamespace() ) { return 0; }
 554                 if ( $this->isRedirect( $text ) ) { return 0; }
 555                 $token = ($wgUseCommaCount ? ',' : '[[' );
 556                 if ( false === strstr( $text, $token ) ) { return 0; }
 557                 return 1;
 558         }
 559
 560         /**
 561          * Tests if the article text represents a redirect
 562          */
 563         function isRedirect( $text = false ) {
 564                 if ( $text === false ) {
 565                         $this->loadContent();
 566                         $titleObj = Title::newFromRedirect( $this->fetchContent() );
 567                 } else {
 568                         $titleObj = Title::newFromRedirect( $text );
 569                 }
 570                 return $titleObj !== NULL;
 571         }
 572
 573         /**
 574          * Returns true if the currently-referenced revision is the current edit
 575          * to this page (and it exists).
 576          * @return bool
 577          */
 578         function isCurrent() {
 579                 return $this->exists() &&
 580                         isset( $this->mRevision ) &&
 581                         $this->mRevision->isCurrent();
 582         }
 583
 584         /**
 585          * Loads everything except the text
 586          * This isn't necessary for all uses, so it's only done if needed.
 587          * @private
 588          */
 589         function loadLastEdit() {
 590                 global $wgOut;
 591
 592                 if ( -1 != $this->mUser )
 593                         return;
 594
 595                 # New or non-existent articles have no user information
 596                 $id = $this->getID();
 597                 if ( 0 == $id ) return;
 598
 599                 $this->mLastRevision = Revision::loadFromPageId( $this->getDB(), $id );
 600                 if( !is_null( $this->mLastRevision ) ) {
 601                         $this->mUser      = $this->mLastRevision->getUser();
 602                         $this->mUserText  = $this->mLastRevision->getUserText();
 603                         $this->mTimestamp = $this->mLastRevision->getTimestamp();
 604                         $this->mComment   = $this->mLastRevision->getComment();
 605                         $this->mMinorEdit = $this->mLastRevision->isMinor();
 606                 }
 607         }
 608
 609         function getTimestamp() {
 610                 $this->loadLastEdit();
 611                 return wfTimestamp(TS_MW, $this->mTimestamp);
 612         }
 613
 614         function getUser() {
 615                 $this->loadLastEdit();
 616                 return $this->mUser;
 617         }
 618
 619         function getUserText() {
 620                 $this->loadLastEdit();
 621                 return $this->mUserText;
 622         }
 623
 624         function getComment() {
 625                 $this->loadLastEdit();
 626                 return $this->mComment;
 627         }
 628
 629         function getMinorEdit() {
 630                 $this->loadLastEdit();
 631                 return $this->mMinorEdit;
 632         }
 633
 634         function getRevIdFetched() {
 635                 $this->loadLastEdit();
 636                 return $this->mRevIdFetched;
 637         }
 638
 639         function getContributors($limit = 0, $offset = 0) {
 640                 $fname = 'Article::getContributors';
 641
 642                 # XXX: this is expensive; cache this info somewhere.
 643
 644                 $title = $this->mTitle;
 645                 $contribs = array();
 646                 $dbr =& $this->getDB();
 647                 $revTable = $dbr->tableName( 'revision' );
 648                 $userTable = $dbr->tableName( 'user' );
 649                 $encDBkey = $dbr->addQuotes( $title->getDBkey() );
 650                 $ns = $title->getNamespace();
 651                 $user = $this->getUser();
 652                 $pageId = $this->getId();
 653
 654                 $sql = "SELECT rev_user, rev_user_text, user_real_name, MAX(rev_timestamp) as timestamp
 655                         FROM $revTable LEFT JOIN $userTable ON rev_user = user_id
 656                         WHERE rev_page = $pageId
 657                         AND rev_user != $user
 658                         GROUP BY rev_user, rev_user_text, user_real_name
 659                         ORDER BY timestamp DESC";
 660
 661                 if ($limit > 0) { $sql .= ' LIMIT '.$limit; }
 662                 $sql .= ' '. $this->getSelectOptions();
 663
 664                 $res = $dbr->query($sql, $fname);
 665
 666                 while ( $line = $dbr->fetchObject( $res ) ) {
 667                         $contribs[] = array($line->rev_user, $line->rev_user_text, $line->user_real_name);
 668                 }
 669
 670                 $dbr->freeResult($res);
 671                 return $contribs;
 672         }
 673
 674         /**
 675          * This is the default action of the script: just view the page of
 676          * the given title.
 677         */
 678         function view() {
 679                 global $wgUser, $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgLang, $wgContLang;
 680                 global $wgLinkCache, $IP, $wgEnableParserCache, $wgStylePath, $wgUseRCPatrol;
 681                 global $wgEnotif, $wgParser, $wgParserCache, $wgUseTrackbacks;
 682                 $sk = $wgUser->getSkin();
 683
 684                 $fname = 'Article::view';
 685                 wfProfileIn( $fname );
 686                 # Get variables from query string
 687                 $oldid = $this->getOldID();
 688                 $diff = $wgRequest->getVal( 'diff' );
 689                 $rcid = $wgRequest->getVal( 'rcid' );
 690                 $rdfrom = $wgRequest->getVal( 'rdfrom' );
 691
 692                 $wgOut->setArticleFlag( true );
 693                 $wgOut->setRobotpolicy( 'index,follow' );
 694                 # If we got diff and oldid in the query, we want to see a
 695                 # diff page instead of the article.
 696
 697                 if ( !is_null( $diff ) ) {
 698                         require_once( 'DifferenceEngine.php' );
 699                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 700
 701                         $de = new DifferenceEngine( $this->mTitle, $oldid, $diff, $rcid );
 702                         // DifferenceEngine directly fetched the revision:
 703                         $this->mRevIdFetched = $de->mNewid;
 704                         $de->showDiffPage();
 705
 706                         if( $diff == 0 ) {
 707                                 # Run view updates for current revision only
 708                                 $this->viewUpdates();
 709                         }
 710                         wfProfileOut( $fname );
 711                         return;
 712                 }
 713
 714                 if ( empty( $oldid ) && $this->checkTouched() ) {
 715                         $wgOut->setETag($wgParserCache->getETag($this, $wgUser));
 716
 717                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 718                                 wfProfileOut( $fname );
 719                                 return;
 720                         } else if ( $this->tryFileCache() ) {
 721                                 # tell wgOut that output is taken care of
 722                                 $wgOut->disable();
 723                                 $this->viewUpdates();
 724                                 wfProfileOut( $fname );
 725                                 return;
 726                         }
 727                 }
 728                 # Should the parser cache be used?
 729                 $pcache = $wgEnableParserCache &&
 730                         intval( $wgUser->getOption( 'stubthreshold' ) ) == 0 &&
 731                         $this->exists() &&
 732                         empty( $oldid );
 733                 wfDebug( 'Article::view using parser cache: ' . ($pcache ? 'yes' : 'no' ) . "\n" );
 734
 735                 $outputDone = false;
 736                 if ( $pcache ) {
 737                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 738                                 $outputDone = true;
 739                         }
 740                 }
 741                 if ( !$outputDone ) {
 742                         $text = $this->getContent( false ); # May change mTitle by following a redirect
 743
 744                         # Another whitelist check in case oldid or redirects are altering the title
 745                         if ( !$this->mTitle->userCanRead() ) {
 746                                 $wgOut->loginToUse();
 747                                 $wgOut->output();
 748                                 exit;
 749                         }
 750
 751                         # We're looking at an old revision
 752
 753                         if ( !empty( $oldid ) ) {
 754                                 $this->setOldSubtitle( isset($this->mOldId) ? $this->mOldId : $oldid );
 755                                 $wgOut->setRobotpolicy( 'noindex,follow' );
 756                         }
 757                         $wasRedirected = false;
 758                         if ( '' != $this->mRedirectedFrom ) {
 759                                 if ( wfRunHooks( 'ArticleViewRedirect', array( &$this ) ) ) {
 760                                         $sk = $wgUser->getSkin();
 761                                         $redir = $sk->makeKnownLink( $this->mRedirectedFrom, '', 'redirect=no' );
 762                                         $s = wfMsg( 'redirectedfrom', $redir );
 763                                         $wgOut->setSubtitle( $s );
 764
 765                                         // Check the parser cache again, for the target page
 766                                         if( $pcache ) {
 767                                                 if( $wgOut->tryParserCache( $this, $wgUser ) ) {
 768                                                         $outputDone = true;
 769                                                 }
 770                                         }
 771                                         $wasRedirected = true;
 772                                 }
 773                         } elseif ( !empty( $rdfrom ) ) {
 774                                 global $wgRedirectSources;
 775                                 if( $wgRedirectSources && preg_match( $wgRedirectSources, $rdfrom ) ) {
 776                                         $sk = $wgUser->getSkin();
 777                                         $redir = $sk->makeExternalLink( $rdfrom, $rdfrom );
 778                                         $s = wfMsg( 'redirectedfrom', $redir );
 779                                         $wgOut->setSubtitle( $s );
 780                                         $wasRedirected = true;
 781                                 }
 782                         }
 783                 }
 784                 if( !$outputDone ) {
 785                         # wrap user css and user js in pre and don't parse
 786                         # XXX: use $this->mTitle->usCssJsSubpage() when php is fixed/ a workaround is found
 787                         if (
 788                                 $this->mTitle->getNamespace() == NS_USER &&
 789                                 preg_match('/\\/[\\w]+\\.(css|js)$/', $this->mTitle->getDBkey())
 790                         ) {
 791                                 $wgOut->addWikiText( wfMsg('clearyourcache'));
 792                                 $wgOut->addHTML( '<pre>'.htmlspecialchars($this->mContent)."\n</pre>" );
 793                         } else if ( $rt = Title::newFromRedirect( $text ) ) {
 794                                 # Display redirect
 795                                 $imageDir = $wgContLang->isRTL() ? 'rtl' : 'ltr';
 796                                 $imageUrl = $wgStylePath.'/common/images/redirect' . $imageDir . '.png';
 797                                 if( !$wasRedirected ) {
 798                                         $wgOut->setSubtitle( wfMsgHtml( 'redirectpagesub' ) );
 799                                 }
 800                                 $targetUrl = $rt->escapeLocalURL();
 801                                 $titleText = htmlspecialchars( $rt->getPrefixedText() );
 802                                 $link = $sk->makeLinkObj( $rt );
 803
 804                                 $wgOut->addHTML( '<img src="'.$imageUrl.'" alt="#REDIRECT" />' .
 805                                   '<span class="redirectText">'.$link.'</span>' );
 806
 807                                 $parseout = $wgParser->parse($text, $this->mTitle, ParserOptions::newFromUser($wgUser));
 808                                 $catlinks = $parseout->getCategoryLinks();
 809                                 $wgOut->addCategoryLinks($catlinks);
 810                                 $skin = $wgUser->getSkin();
 811                         } else if ( $pcache ) {
 812                                 # Display content and save to parser cache
 813                                 $wgOut->addPrimaryWikiText( $text, $this );
 814                         } else {
 815                                 # Display content, don't attempt to save to parser cache
 816
 817                                 # Don't show section-edit links on old revisions... this way lies madness.
 818                                 if( !$this->isCurrent() ) {
 819                                         $oldEditSectionSetting = $wgOut->mParserOptions->setEditSection( false );
 820                                 }
 821                                 $wgOut->addWikiText( $text );
 822
 823                                 if( !$this->isCurrent() ) {
 824                                         $wgOut->mParserOptions->setEditSection( $oldEditSectionSetting );
 825                                 }
 826                         }
 827                 }
 828                 /* title may have been set from the cache */
 829                 $t = $wgOut->getPageTitle();
 830                 if( empty( $t ) ) {
 831                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 832                 }
 833
 834                 # If we have been passed an &rcid= parameter, we want to give the user a
 835                 # chance to mark this new article as patrolled.
 836                 if ( $wgUseRCPatrol
 837                         && !is_null($rcid)
 838                         && $rcid != 0
 839                         && $wgUser->isLoggedIn()
 840                         && ( $wgUser->isAllowed('patrol') || !$wgOnlySysopsCanPatrol ) )
 841                 {
 842                         $wgOut->addHTML(
 843                                 "<div class='patrollink'>" .
 844                                         wfMsg ( 'markaspatrolledlink',
 845                                         $sk->makeKnownLinkObj( $this->mTitle, wfMsg('markaspatrolledtext'), "action=markpatrolled&rcid=$rcid" )
 846                                         ) .
 847                                 '</div>'
 848                          );
 849                 }
 850
 851                 # Trackbacks
 852                 if ($wgUseTrackbacks)
 853                         $this->addTrackbacks();
 854
 855                 # Put link titles into the link cache
 856                 $wgOut->transformBuffer();
 857
 858                 # Add link titles as META keywords
 859                 $wgOut->addMetaTags() ;
 860
 861                 $this->viewUpdates();
 862                 wfProfileOut( $fname );
 863         }
 864
 865         function addTrackbacks() {
 866                 global $wgOut, $wgUser;
 867
 868                 $dbr =& wfGetDB(DB_SLAVE);
 869                 $tbs = $dbr->select(
 870                                 /* FROM   */ 'trackbacks',
 871                                 /* SELECT */ array('tb_id', 'tb_title', 'tb_url', 'tb_ex', 'tb_name'),
 872                                 /* WHERE  */ array('tb_page' => $this->getID())
 873                 );
 874
 875                 if (!$dbr->numrows($tbs))
 876                         return;
 877
 878                 $tbtext = "";
 879                 while ($o = $dbr->fetchObject($tbs)) {
 880                         $rmvtxt = "";
 881                         if ($wgUser->isSysop()) {
 882                                 $delurl = $this->mTitle->getFullURL("action=deletetrackback&tbid="
 883                                                 . $o->tb_id . "&token=" . $wgUser->editToken());
 884                                 $rmvtxt = wfMsg('trackbackremove', $delurl);
 885                         }
 886                         $tbtext .= wfMsg(strlen($o->tb_ex) ? 'trackbackexcerpt' : 'trackback',
 887                                         $o->tb_title,
 888                                         $o->tb_url,
 889                                         $o->tb_ex,
 890                                         $o->tb_name,
 891                                         $rmvtxt);
 892                 }
 893                 $wgOut->addWikitext(wfMsg('trackbackbox', $tbtext));
 894         }
 895
 896         function deletetrackback() {
 897                 global $wgUser, $wgRequest, $wgOut, $wgTitle;
 898
 899                 if (!$wgUser->matchEditToken($wgRequest->getVal('token'))) {
 900                         $wgOut->addWikitext(wfMsg('sessionfailure'));
 901                         return;
 902                 }
 903
 904                 if ((!$wgUser->isAllowed('delete'))) {
 905                         $wgOut->sysopRequired();
 906                         return;
 907                 }
 908
 909                 if (wfReadOnly()) {
 910                         $wgOut->readOnlyPage();
 911                         return;
 912                 }
 913
 914                 $db =& wfGetDB(DB_MASTER);
 915                 $db->delete('trackbacks', array('tb_id' => $wgRequest->getInt('tbid')));
 916                 $wgTitle->invalidateCache();
 917                 $wgOut->addWikiText(wfMsg('trackbackdeleteok'));
 918         }
 919
 920         function render() {
 921                 global $wgOut;
 922
 923                 $wgOut->setArticleBodyOnly(true);
 924                 $this->view();
 925         }
 926
 927         function purge() {
 928                 global $wgUser, $wgRequest, $wgOut, $wgUseSquid;
 929
 930                 if ( $wgUser->isLoggedIn() || $wgRequest->wasPosted() ) {
 931                         // Invalidate the cache
 932                         $this->mTitle->invalidateCache();
 933
 934                         if ( $wgUseSquid ) {
 935                                 // Commit the transaction before the purge is sent
 936                                 $dbw = wfGetDB( DB_MASTER );
 937                                 $dbw->immediateCommit();
 938
 939                                 // Send purge
 940                                 $update = SquidUpdate::newSimplePurge( $this->mTitle );
 941                                 $update->doUpdate();
 942                         }
 943                         // Redirect to the article
 944                         $wgOut->redirect( $this->mTitle->getFullURL() );
 945                 } else {
 946                         $msg = $wgOut->parse( wfMsg( 'confirm_purge' ) );
 947                         $action = $this->mTitle->escapeLocalURL( 'action=purge' );
 948                         $button = htmlspecialchars( wfMsg( 'confirm_purge_button' ) );
 949                         $msg = str_replace( '$1',
 950                                 "<form method=\"post\" action=\"$action\">\n" .
 951                                 "<input type=\"submit\" name=\"submit\" value=\"$button\" />\n" .
 952                                 "</form>\n", $msg );
 953
 954                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 955                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
 956                         $wgOut->addHTML( $msg );
 957                 }
 958         }
 959
 960         /**
 961          * Insert a new empty page record for this article.
 962          * This *must* be followed up by creating a revision
 963          * and running $this->updateToLatest( $rev_id );
 964          * or else the record will be left in a funky state.
 965          * Best if all done inside a transaction.
 966          *
 967          * @param Database $dbw
 968          * @param string   $restrictions
 969          * @return int     The newly created page_id key
 970          * @access private
 971          */
 972         function insertOn( &$dbw, $restrictions = '' ) {
 973                 $fname = 'Article::insertOn';
 974                 wfProfileIn( $fname );
 975
 976                 $page_id = $dbw->nextSequenceValue( 'page_page_id_seq' );
 977                 $dbw->insert( 'page', array(
 978                         'page_id'           => $page_id,
 979                         'page_namespace'    => $this->mTitle->getNamespace(),
 980                         'page_title'        => $this->mTitle->getDBkey(),
 981                         'page_counter'      => 0,
 982                         'page_restrictions' => $restrictions,
 983                         'page_is_redirect'  => 0, # Will set this shortly...
 984                         'page_is_new'       => 1,
 985                         'page_random'       => wfRandom(),
 986                         'page_touched'      => $dbw->timestamp(),
 987                         'page_latest'       => 0, # Fill this in shortly...
 988                         'page_len'          => 0, # Fill this in shortly...
 989                 ), $fname );
 990                 $newid = $dbw->insertId();
 991
 992                 $this->mTitle->resetArticleId( $newid );
 993
 994                 wfProfileOut( $fname );
 995                 return $newid;
 996         }
 997
 998         /**
 999          * Update the page record to point to a newly saved revision.
1000          *
1001          * @param Database $dbw
1002          * @param Revision $revision -- for ID number, and text used to set
1003                                         length and redirect status fields
1004          * @param int $lastRevision -- if given, will not overwrite the page field
1005          *                             when different from the currently set value.
1006          *                             Giving 0 indicates the new page flag should
1007          *                             be set on.
1008          * @return bool true on success, false on failure
1009          * @access private
1010          */
1011         function updateRevisionOn( &$dbw, $revision, $lastRevision = null ) {
1012                 $fname = 'Article::updateToRevision';
1013                 wfProfileIn( $fname );
1014
1015                 $conditions = array( 'page_id' => $this->getId() );
1016                 if( !is_null( $lastRevision ) ) {
1017                         # An extra check against threads stepping on each other
1018                         $conditions['page_latest'] = $lastRevision;
1019                 }
1020
1021                 $text = $revision->getText();
1022                 $dbw->update( 'page',
1023                         array( /* SET */
1024                                 'page_latest'      => $revision->getId(),
1025                                 'page_touched'     => $dbw->timestamp(),
1026                                 'page_is_new'      => ($lastRevision === 0) ? 1 : 0,
1027                                 'page_is_redirect' => Article::isRedirect( $text ) ? 1 : 0,
1028                                 'page_len'         => strlen( $text ),
1029                         ),
1030                         $conditions,
1031                         $fname );
1032
1033                 wfProfileOut( $fname );
1034                 return ( $dbw->affectedRows() != 0 );
1035         }
1036
1037         /**
1038          * If the given revision is newer than the currently set page_latest,
1039          * update the page record. Otherwise, do nothing.
1040          *
1041          * @param Database $dbw
1042          * @param Revision $revision
1043          */
1044         function updateIfNewerOn( &$dbw, $revision ) {
1045                 $fname = 'Article::updateIfNewerOn';
1046                 wfProfileIn( $fname );
1047
1048                 $row = $dbw->selectRow(
1049                         array( 'revision', 'page' ),
1050                         array( 'rev_id', 'rev_timestamp' ),
1051                         array(
1052                                 'page_id' => $this->getId(),
1053                                 'page_latest=rev_id' ),
1054                         $fname );
1055                 if( $row ) {
1056                         if( wfTimestamp(TS_MW, $row->rev_timestamp) >= $revision->getTimestamp() ) {
1057                                 wfProfileOut( $fname );
1058                                 return false;
1059                         }
1060                         $prev = $row->rev_id;
1061                 } else {
1062                         # No or missing previous revision; mark the page as new
1063                         $prev = 0;
1064                 }
1065
1066                 $ret = $this->updateRevisionOn( $dbw, $revision, $prev );
1067                 wfProfileOut( $fname );
1068                 return $ret;
1069         }
1070
1071         /**
1072          * Theoretically we could defer these whole insert and update
1073          * functions for after display, but that's taking a big leap
1074          * of faith, and we want to be able to report database
1075          * errors at some point.
1076          * @private
1077          */
1078         function insertNewArticle( $text, $summary, $isminor, $watchthis, $suppressRC=false, $comment=false ) {
1079                 global $wgOut, $wgUser;
1080                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
1081
1082                 $fname = 'Article::insertNewArticle';
1083                 wfProfileIn( $fname );
1084
1085                 if( !wfRunHooks( 'ArticleSave', array( &$this, &$wgUser, &$text,
1086                         &$summary, &$isminor, &$watchthis, NULL ) ) ) {
1087                         wfDebug( "$fname: ArticleSave hook aborted save!\n" );
1088                         wfProfileOut( $fname );
1089                         return false;
1090                 }
1091
1092                 $this->mGoodAdjustment = $this->isCountable( $text );
1093                 $this->mTotalAdjustment = 1;
1094
1095                 $ns = $this->mTitle->getNamespace();
1096                 $ttl = $this->mTitle->getDBkey();
1097
1098                 # If this is a comment, add the summary as headline
1099                 if($comment && $summary!="") {
1100                         $text="== {$summary} ==\n\n".$text;
1101                 }
1102                 $text = $this->preSaveTransform( $text );
1103                 $isminor = ( $isminor && $wgUser->isLoggedIn() ) ? 1 : 0;
1104                 $now = wfTimestampNow();
1105
1106                 $dbw =& wfGetDB( DB_MASTER );
1107
1108                 # Add the page record; stake our claim on this title!
1109                 $newid = $this->insertOn( $dbw );
1110
1111                 # Save the revision text...
1112                 $revision = new Revision( array(
1113                         'page'       => $newid,
1114                         'comment'    => $summary,
1115                         'minor_edit' => $isminor,
1116                         'text'       => $text
1117                         ) );
1118                 $revisionId = $revision->insertOn( $dbw );
1119
1120                 $this->mTitle->resetArticleID( $newid );
1121
1122                 # Update the page record with revision data
1123                 $this->updateRevisionOn( $dbw, $revision, 0 );
1124
1125                 Article::onArticleCreate( $this->mTitle );
1126                 if(!$suppressRC) {
1127                         RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary, 'default',
1128                           '', strlen( $text ), $revisionId );
1129                 }
1130
1131                 if ($watchthis) {
1132                         if(!$this->mTitle->userIsWatching()) $this->watch();
1133                 } else {
1134                         if ( $this->mTitle->userIsWatching() ) {
1135                                 $this->unwatch();
1136                         }
1137                 }
1138
1139                 # The talk page isn't in the regular link tables, so we need to update manually:
1140                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
1141                 $dbw->update( 'page',
1142                         array( 'page_touched' => $dbw->timestamp($now) ),
1143                         array( 'page_namespace' => $talkns,
1144                                'page_title' => $ttl ),
1145                         $fname );
1146
1147                 # standard deferred updates
1148                 $this->editUpdates( $text, $summary, $isminor, $now );
1149
1150                 $oldid = 0; # new article
1151                 $this->showArticle( $text, wfMsg( 'newarticle' ), false, $isminor, $now, $summary, $oldid );
1152
1153                 wfRunHooks( 'ArticleSaveComplete', array( &$this, &$wgUser, $text,
1154                         $summary, $isminor,
1155                         $watchthis, NULL ) );
1156                 wfProfileOut( $fname );
1157         }
1158
1159         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = '', $edittime = NULL) {
1160                 $this->replaceSection( $section, $text, $summary, $edittime );
1161         }
1162
1163         /**
1164          * @return string Complete article text, or null if error
1165          */
1166         function replaceSection($section, $text, $summary = '', $edittime = NULL) {
1167                 $fname = 'Article::replaceSection';
1168                 wfProfileIn( $fname );
1169
1170                 if ($section != '') {
1171                         if( is_null( $edittime ) ) {
1172                                 $rev = Revision::newFromTitle( $this->mTitle );
1173                         } else {
1174                                 $dbw =& wfGetDB( DB_MASTER );
1175                                 $rev = Revision::loadFromTimestamp( $dbw, $this->mTitle, $edittime );
1176                         }
1177                         if( is_null( $rev ) ) {
1178                                 wfDebug( "Article::replaceSection asked for bogus section (page: " .
1179                                         $this->getId() . "; section: $section; edittime: $edittime)\n" );
1180                                 return null;
1181                         }
1182                         $oldtext = $rev->getText();
1183
1184                         if($section=='new') {
1185                                 if($summary) $subject="== {$summary} ==\n\n";
1186                                 $text=$oldtext."\n\n".$subject.$text;
1187                         } else {
1188
1189                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
1190                                 # comments to be stripped as well)
1191                                 $striparray=array();
1192                                 $parser=new Parser();
1193                                 $parser->mOutputType=OT_WIKI;
1194                                 $parser->mOptions = new ParserOptions();
1195                                 $oldtext=$parser->strip($oldtext, $striparray, true);
1196
1197                                 # now that we can be sure that no pseudo-sections are in the source,
1198                                 # split it up
1199                                 # Unfortunately we can't simply do a preg_replace because that might
1200                                 # replace the wrong section, so we have to use the section counter instead
1201                                 $secs=preg_split('/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
1202                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
1203                                 $secs[$section*2]=$text."\n\n"; // replace with edited
1204
1205                                 # section 0 is top (intro) section
1206                                 if($section!=0) {
1207
1208                                         # headline of old section - we need to go through this section
1209                                         # to determine if there are any subsections that now need to
1210                                         # be erased, as the mother section has been replaced with
1211                                         # the text of all subsections.
1212                                         $headline=$secs[$section*2-1];
1213                                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
1214                                         $hlevel=$matches[1];
1215
1216                                         # determine headline level for wikimarkup headings
1217                                         if(strpos($hlevel,'=')!==false) {
1218                                                 $hlevel=strlen($hlevel);
1219                                         }
1220
1221                                         $secs[$section*2-1]=''; // erase old headline
1222                                         $count=$section+1;
1223                                         $break=false;
1224                                         while(!empty($secs[$count*2-1]) && !$break) {
1225
1226                                                 $subheadline=$secs[$count*2-1];
1227                                                 preg_match(
1228                                                  '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
1229                                                 $subhlevel=$matches[1];
1230                                                 if(strpos($subhlevel,'=')!==false) {
1231                                                         $subhlevel=strlen($subhlevel);
1232                                                 }
1233                                                 if($subhlevel > $hlevel) {
1234                                                         // erase old subsections
1235                                                         $secs[$count*2-1]='';
1236                                                         $secs[$count*2]='';
1237                                                 }
1238                                                 if($subhlevel <= $hlevel) {
1239                                                         $break=true;
1240                                                 }
1241                                                 $count++;
1242
1243                                         }
1244
1245                                 }
1246                                 $text=join('',$secs);
1247                                 # reinsert the stuff that we stripped out earlier
1248                                 $text=$parser->unstrip($text,$striparray);
1249                                 $text=$parser->unstripNoWiki($text,$striparray);
1250                         }
1251
1252                 }
1253                 wfProfileOut( $fname );
1254                 return $text;
1255         }
1256
1257         /**
1258          * Change an existing article. Puts the previous version back into the old table, updates RC
1259          * and all necessary caches, mostly via the deferred update array.
1260          *
1261          * It is possible to call this function from a command-line script, but note that you should
1262          * first set $wgUser, and clean up $wgDeferredUpdates after each edit.
1263          */
1264         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
1265                 global $wgOut, $wgUser;
1266                 global $wgDBtransactions, $wgMwRedir;
1267                 global $wgUseSquid, $wgInternalServer, $wgPostCommitUpdateList, $wgUseFileCache;
1268
1269                 $fname = 'Article::updateArticle';
1270                 wfProfileIn( $fname );
1271                 $good = true;
1272
1273                 if( !wfRunHooks( 'ArticleSave', array( &$this, &$wgUser, &$text,
1274                         &$summary, &$minor,
1275                         &$watchthis, &$sectionanchor ) ) ) {
1276                         wfDebug( "$fname: ArticleSave hook aborted save!\n" );
1277                         wfProfileOut( $fname );
1278                         return false;
1279                 }
1280
1281                 $isminor = ( $minor && $wgUser->isLoggedIn() );
1282                 if ( $this->isRedirect( $text ) ) {
1283                         # Remove all content but redirect
1284                         # This could be done by reconstructing the redirect from a title given by
1285                         # Title::newFromRedirect(), but then we wouldn't know which synonym the user
1286                         # wants to see
1287                         if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ')[^\\n]+)/i', $text, $m ) ) {
1288                                 $redir = 1;
1289                                 $text = $m[1] . "\n";
1290                         }
1291                 }
1292                 else { $redir = 0; }
1293
1294                 $text = $this->preSaveTransform( $text );
1295                 $dbw =& wfGetDB( DB_MASTER );
1296                 $now = wfTimestampNow();
1297
1298                 # Update article, but only if changed.
1299
1300                 # It's important that we either rollback or complete, otherwise an attacker could
1301                 # overwrite cur entries by sending precisely timed user aborts. Random bored users
1302                 # could conceivably have the same effect, especially if cur is locked for long periods.
1303                 if( !$wgDBtransactions ) {
1304                         $userAbort = ignore_user_abort( true );
1305                 }
1306
1307                 $oldtext = $this->getContent( true );
1308                 $oldsize = strlen( $oldtext );
1309                 $newsize = strlen( $text );
1310                 $lastRevision = 0;
1311
1312                 if ( 0 != strcmp( $text, $oldtext ) ) {
1313                         $this->mGoodAdjustment = $this->isCountable( $text )
1314                           - $this->isCountable( $oldtext );
1315                         $this->mTotalAdjustment = 0;
1316                         $now = wfTimestampNow();
1317
1318                         $lastRevision = $dbw->selectField(
1319                                 'page', 'page_latest', array( 'page_id' => $this->getId() ) );
1320
1321                         $revision = new Revision( array(
1322                                 'page'       => $this->getId(),
1323                                 'comment'    => $summary,
1324                                 'minor_edit' => $isminor,
1325                                 'text'       => $text
1326                                 ) );
1327
1328                         $dbw->immediateCommit();
1329                         $dbw->begin();
1330                         $revisionId = $revision->insertOn( $dbw );
1331
1332                         # Update page
1333                         $ok = $this->updateRevisionOn( $dbw, $revision, $lastRevision );
1334
1335                         if( !$ok ) {
1336                                 /* Belated edit conflict! Run away!! */
1337                                 $good = false;
1338                                 $dbw->rollback();
1339                         } else {
1340                                 # Update recentchanges and purge cache and whatnot
1341                                 $bot = (int)($wgUser->isBot() || $forceBot);
1342                                 RecentChange::notifyEdit( $now, $this->mTitle, $isminor, $wgUser, $summary,
1343                                         $lastRevision, $this->getTimestamp(), $bot, '', $oldsize, $newsize,
1344                                         $revisionId );
1345                                 Article::onArticleEdit( $this->mTitle );
1346                                 $dbw->commit();
1347                         }
1348                 }
1349
1350                 if( !$wgDBtransactions ) {
1351                         ignore_user_abort( $userAbort );
1352                 }
1353
1354                 if ( $good ) {
1355                         if ($watchthis) {
1356                                 if (!$this->mTitle->userIsWatching()) {
1357                                         $dbw->immediateCommit();
1358                                         $dbw->begin();
1359                                         $this->watch();
1360                                         $dbw->commit();
1361                                 }
1362                         } else {
1363                                 if ( $this->mTitle->userIsWatching() ) {
1364                                         $dbw->immediateCommit();
1365                                         $dbw->begin();
1366                                         $this->unwatch();
1367                                         $dbw->commit();
1368                                 }
1369                         }
1370                         # standard deferred updates
1371                         $this->editUpdates( $text, $summary, $minor, $now );
1372
1373
1374                         $urls = array();
1375                         # Template namespace
1376                         # Purge all articles linking here
1377                         if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
1378                                 $titles = $this->mTitle->getLinksTo();
1379                                 Title::touchArray( $titles );
1380                                 if ( $wgUseSquid ) {
1381                                                 foreach ( $titles as $title ) {
1382                                                         $urls[] = $title->getInternalURL();
1383                                                 }
1384                                 }
1385                         }
1386
1387                         # Squid updates
1388                         if ( $wgUseSquid ) {
1389                                 $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
1390                                 $u = new SquidUpdate( $urls );
1391                                 array_push( $wgPostCommitUpdateList, $u );
1392                         }
1393
1394                         # File cache
1395                         if ( $wgUseFileCache ) {
1396                                 $cm = new CacheManager($this->mTitle);
1397                                 @unlink($cm->fileCacheName());
1398                         }
1399
1400                         $this->showArticle( $text, wfMsg( 'updated' ), $sectionanchor, $isminor, $now, $summary, $lastRevision );
1401                 }
1402                 wfRunHooks( 'ArticleSaveComplete',
1403                         array( &$this, &$wgUser, $text,
1404                         $summary, $minor,
1405                         $watchthis, $sectionanchor ) );
1406                 wfProfileOut( $fname );
1407                 return $good;
1408         }
1409
1410         /**
1411          * After we've either updated or inserted the article, update
1412          * the link tables and redirect to the new page.
1413          */
1414         function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid ) {
1415                 global $wgUseDumbLinkUpdate, $wgAntiLockFlags, $wgOut, $wgUser, $wgLinkCache, $wgEnotif;
1416                 global $wgUseEnotif;
1417
1418                 $fname = 'Article::showArticle';
1419                 wfProfileIn( $fname );
1420
1421                 $wgLinkCache = new LinkCache();
1422
1423                 if ( !$wgUseDumbLinkUpdate ) {
1424                         # Preload links to reduce lock time
1425                         if ( $wgAntiLockFlags & ALF_PRELOAD_LINKS ) {
1426                                 $wgLinkCache->preFill( $this->mTitle );
1427                                 $wgLinkCache->clear();
1428                         }
1429                 }
1430
1431                 # Parse the text and save it to the parser cache
1432                 $wgOut = new OutputPage();
1433                 $wgOut->setParserOptions( ParserOptions::newFromUser( $wgUser ) );
1434                 $wgOut->addPrimaryWikiText( $text, $this );
1435
1436                 if ( !$wgUseDumbLinkUpdate ) {
1437                         # Move the current links back to the second register
1438                         $wgLinkCache->swapRegisters();
1439
1440                         # Get old version of link table to allow incremental link updates
1441                         # Lock this data now since it is needed for an update
1442                         $wgLinkCache->forUpdate( true );
1443                         $wgLinkCache->preFill( $this->mTitle );
1444
1445                         # Swap this old version back into its rightful place
1446                         $wgLinkCache->swapRegisters();
1447                 }
1448
1449                 if( $this->isRedirect( $text ) )
1450                         $r = 'redirect=no';
1451                 else
1452                         $r = '';
1453                 $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
1454
1455                 if ( $wgUseEnotif  ) {
1456                         # this would be better as an extension hook
1457                         include_once( "UserMailer.php" );
1458                         $wgEnotif = new EmailNotification ();
1459                         $wgEnotif->notifyOnPageChange( $this->mTitle, $now, $summary, $me2, $oldid );
1460                 }
1461                 wfProfileOut( $fname );
1462         }
1463
1464         /**
1465          * Mark this particular edit as patrolled
1466          */
1467         function markpatrolled() {
1468                 global $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgUseRCPatrol, $wgUser;
1469                 $wgOut->setRobotpolicy( 'noindex,follow' );
1470
1471                 if ( !$wgUseRCPatrol )
1472                 {
1473                         $wgOut->errorpage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1474                         return;
1475                 }
1476                 if ( $wgUser->isAnon() )
1477                 {
1478                         $wgOut->loginToUse();
1479                         return;
1480                 }
1481                 if ( $wgOnlySysopsCanPatrol && !$wgUser->isAllowed('patrol') )
1482                 {
1483                         $wgOut->sysopRequired();
1484                         return;
1485                 }
1486                 $rcid = $wgRequest->getVal( 'rcid' );
1487                 if ( !is_null ( $rcid ) )
1488                 {
1489                         RecentChange::markPatrolled( $rcid );
1490                         $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
1491                         $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
1492
1493                         $rcTitle = Title::makeTitle( NS_SPECIAL, 'Recentchanges' );
1494                         $wgOut->returnToMain( false, $rcTitle->getPrefixedText() );
1495                 }
1496                 else
1497                 {
1498                         $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1499                 }
1500         }
1501
1502         /**
1503          * Validate function
1504          */
1505         function validate() {
1506                 global $wgOut, $wgUser, $wgRequest, $wgUseValidation;
1507
1508                 if ( !$wgUseValidation ) # Are we using article validation at all?
1509                 {
1510                         $wgOut->errorpage( "nosuchspecialpage", "nospecialpagetext" );
1511                         return ;
1512                 }
1513
1514                 $wgOut->setRobotpolicy( 'noindex,follow' );
1515                 $revision = $wgRequest->getVal( 'revision' );
1516
1517                 include_once ( "SpecialValidate.php" ) ; # The "Validation" class
1518
1519                 $v = new Validation ;
1520                 if ( $wgRequest->getVal ( "mode" , "" ) == "list" )
1521                         $t = $v->showList ( $this ) ;
1522                 else if ( $wgRequest->getVal ( "mode" , "" ) == "details" )
1523                         $t = $v->showDetails ( $this , $wgRequest->getVal( 'revision' ) ) ;
1524                 else
1525                         $t = $v->validatePageForm ( $this , $revision ) ;
1526
1527                 $wgOut->addHTML ( $t ) ;
1528         }
1529
1530         /**
1531          * Add this page to $wgUser's watchlist
1532          */
1533
1534         function watch() {
1535
1536                 global $wgUser, $wgOut;
1537
1538                 if ( $wgUser->isAnon() ) {
1539                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1540                         return;
1541                 }
1542                 if ( wfReadOnly() ) {
1543                         $wgOut->readOnlyPage();
1544                         return;
1545                 }
1546
1547                 if (wfRunHooks('WatchArticle', array(&$wgUser, &$this))) {
1548
1549                         $wgUser->addWatch( $this->mTitle );
1550                         $wgUser->saveSettings();
1551
1552                         wfRunHooks('WatchArticleComplete', array(&$wgUser, &$this));
1553
1554                         $wgOut->setPagetitle( wfMsg( 'addedwatch' ) );
1555                         $wgOut->setRobotpolicy( 'noindex,follow' );
1556
1557                         $link = $this->mTitle->getPrefixedText();
1558                         $text = wfMsg( 'addedwatchtext', $link );
1559                         $wgOut->addWikiText( $text );
1560                 }
1561
1562                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1563         }
1564
1565         /**
1566          * Stop watching a page
1567          */
1568
1569         function unwatch() {
1570
1571                 global $wgUser, $wgOut;
1572
1573                 if ( $wgUser->isAnon() ) {
1574                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1575                         return;
1576                 }
1577                 if ( wfReadOnly() ) {
1578                         $wgOut->readOnlyPage();
1579                         return;
1580                 }
1581
1582                 if (wfRunHooks('UnwatchArticle', array(&$wgUser, &$this))) {
1583
1584                         $wgUser->removeWatch( $this->mTitle );
1585                         $wgUser->saveSettings();
1586
1587                         wfRunHooks('UnwatchArticleComplete', array(&$wgUser, &$this));
1588
1589                         $wgOut->setPagetitle( wfMsg( 'removedwatch' ) );
1590                         $wgOut->setRobotpolicy( 'noindex,follow' );
1591
1592                         $link = $this->mTitle->getPrefixedText();
1593                         $text = wfMsg( 'removedwatchtext', $link );
1594                         $wgOut->addWikiText( $text );
1595                 }
1596
1597                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1598         }
1599
1600         /**
1601          * protect a page
1602          */
1603         function protect( $limit = 'sysop' ) {
1604                 global $wgUser, $wgOut, $wgRequest;
1605
1606                 if ( ! $wgUser->isAllowed('protect') ) {
1607                         $wgOut->sysopRequired();
1608                         return;
1609                 }
1610                 if ( wfReadOnly() ) {
1611                         $wgOut->readOnlyPage();
1612                         return;
1613                 }
1614                 $id = $this->mTitle->getArticleID();
1615                 if ( 0 == $id ) {
1616                         $wgOut->fatalError( wfMsg( 'badarticleerror' ) );
1617                         return;
1618                 }
1619
1620                 $confirm = $wgRequest->wasPosted() &&
1621                         $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
1622                 $moveonly = $wgRequest->getBool( 'wpMoveOnly' );
1623                 $reason = $wgRequest->getText( 'wpReasonProtect' );
1624
1625                 if ( $confirm ) {
1626                         $dbw =& wfGetDB( DB_MASTER );
1627                         $dbw->update( 'page',
1628                                 array( /* SET */
1629                                         'page_touched' => $dbw->timestamp(),
1630                                         'page_restrictions' => (string)$limit
1631                                 ), array( /* WHERE */
1632                                         'page_id' => $id
1633                                 ), 'Article::protect'
1634                         );
1635
1636                         $restrictions = "move=" . $limit;
1637                         if( !$moveonly ) {
1638                                 $restrictions .= ":edit=" . $limit;
1639                         }
1640                         if (wfRunHooks('ArticleProtect', array(&$this, &$wgUser, $limit == 'sysop', $reason, $moveonly))) {
1641
1642                                 $dbw =& wfGetDB( DB_MASTER );
1643                                 $dbw->update( 'page',
1644                                                           array( /* SET */
1645                                                                          'page_touched' => $dbw->timestamp(),
1646                                                                          'page_restrictions' => $restrictions
1647                                                                          ), array( /* WHERE */
1648                                                                                            'page_id' => $id
1649                                                                                            ), 'Article::protect'
1650                                                           );
1651
1652                                 wfRunHooks('ArticleProtectComplete', array(&$this, &$wgUser, $limit == 'sysop', $reason, $moveonly));
1653
1654                                 $log = new LogPage( 'protect' );
1655                                 if ( $limit === '' ) {
1656                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1657                                 } else {
1658                                         $log->addEntry( 'protect', $this->mTitle, $reason );
1659                                 }
1660                                 $wgOut->redirect( $this->mTitle->getFullURL() );
1661                         }
1662                         return;
1663                 } else {
1664                         return $this->confirmProtect( '', '', $limit );
1665                 }
1666         }
1667
1668         /**
1669          * Output protection confirmation dialog
1670          */
1671         function confirmProtect( $par, $reason, $limit = 'sysop'  ) {
1672                 global $wgOut, $wgUser;
1673
1674                 wfDebug( "Article::confirmProtect\n" );
1675
1676                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1677                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1678
1679                 $check = '';
1680                 $protcom = '';
1681                 $moveonly = '';
1682
1683                 if ( $limit === '' ) {
1684                         $wgOut->setPageTitle( wfMsg( 'confirmunprotect' ) );
1685                         $wgOut->setSubtitle( wfMsg( 'unprotectsub', $sub ) );
1686                         $wgOut->addWikiText( wfMsg( 'confirmunprotecttext' ) );
1687                         $protcom = htmlspecialchars( wfMsg( 'unprotectcomment' ) );
1688                         $formaction = $this->mTitle->escapeLocalURL( 'action=unprotect' . $par );
1689                 } else {
1690                         $wgOut->setPageTitle( wfMsg( 'confirmprotect' ) );
1691                         $wgOut->setSubtitle( wfMsg( 'protectsub', $sub ) );
1692                         $wgOut->addWikiText( wfMsg( 'confirmprotecttext' ) );
1693                         $moveonly = htmlspecialchars( wfMsg( 'protectmoveonly' ) );
1694                         $protcom = htmlspecialchars( wfMsg( 'protectcomment' ) );
1695                         $formaction = $this->mTitle->escapeLocalURL( 'action=protect' . $par );
1696                 }
1697
1698                 $confirm = htmlspecialchars( wfMsg( 'protectpage' ) );
1699                 $token = htmlspecialchars( $wgUser->editToken() );
1700
1701                 $wgOut->addHTML( "
1702 <form id='protectconfirm' method='post' action=\"{$formaction}\">
1703         <table border='0'>
1704                 <tr>
1705                         <td align='right'>
1706                                 <label for='wpReasonProtect'>{$protcom}:</label>
1707                         </td>
1708                         <td align='left'>
1709                                 <input type='text' size='60' name='wpReasonProtect' id='wpReasonProtect' value=\"" . htmlspecialchars( $reason ) . "\" />
1710                         </td>
1711                 </tr>" );
1712                 if($moveonly != '') {
1713                         $wgOut->AddHTML( "
1714                 <tr>
1715                         <td align='right'>
1716                                 <input type='checkbox' name='wpMoveOnly' value='1' id='wpMoveOnly' />
1717                         </td>
1718                         <td align='left'>
1719                                 <label for='wpMoveOnly'>{$moveonly}</label>
1720                         </td>
1721                 </tr> " );
1722                 }
1723                 $wgOut->addHTML( "
1724                 <tr>
1725                         <td>&nbsp;</td>
1726                         <td>
1727                                 <input type='submit' name='wpConfirmProtectB' value=\"{$confirm}\" />
1728                         </td>
1729                 </tr>
1730         </table>
1731         <input type='hidden' name='wpEditToken' value=\"{$token}\" />
1732 </form>" );
1733
1734                 $wgOut->returnToMain( false );
1735         }
1736
1737         /**
1738          * Unprotect the pages
1739          */
1740         function unprotect() {
1741                 return $this->protect( '' );
1742         }
1743
1744         /*
1745          * UI entry point for page deletion
1746          */
1747         function delete() {
1748                 global $wgUser, $wgOut, $wgMessageCache, $wgRequest;
1749                 $fname = 'Article::delete';
1750                 $confirm = $wgRequest->wasPosted() &&
1751                         $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
1752                 $reason = $wgRequest->getText( 'wpReason' );
1753
1754                 # This code desperately needs to be totally rewritten
1755
1756                 # Check permissions
1757                 if( ( !$wgUser->isAllowed( 'delete' ) ) ) {
1758                         $wgOut->sysopRequired();
1759                         return;
1760                 }
1761                 if( wfReadOnly() ) {
1762                         $wgOut->readOnlyPage();
1763                         return;
1764                 }
1765
1766                 # Better double-check that it hasn't been deleted yet!
1767                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1768                 if( !$this->mTitle->exists() ) {
1769                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1770                         return;
1771                 }
1772
1773                 if( $confirm ) {
1774                         $this->doDelete( $reason );
1775                         return;
1776                 }
1777
1778                 # determine whether this page has earlier revisions
1779                 # and insert a warning if it does
1780                 # we select the text because it might be useful below
1781                 $dbr =& $this->getDB();
1782                 $ns = $this->mTitle->getNamespace();
1783                 $title = $this->mTitle->getDBkey();
1784                 $revisions = $dbr->select( array( 'page', 'revision' ),
1785                         array( 'rev_id', 'rev_user_text' ),
1786                         array(
1787                                 'page_namespace' => $ns,
1788                                 'page_title' => $title,
1789                                 'rev_page = page_id'
1790                         ), $fname, $this->getSelectOptions( array( 'ORDER BY' => 'rev_timestamp DESC' ) )
1791                 );
1792
1793                 if( $dbr->numRows( $revisions ) > 1 && !$confirm ) {
1794                         $skin=$wgUser->getSkin();
1795                         $wgOut->addHTML('<b>'.wfMsg('historywarning'));
1796                         $wgOut->addHTML( $skin->historyLink() .'</b>');
1797                 }
1798
1799                 # Fetch cur_text
1800                 $rev = Revision::newFromTitle( $this->mTitle );
1801
1802                 # Fetch name(s) of contributors
1803                 $rev_name = '';
1804                 $all_same_user = true;
1805                 while( $row = $dbr->fetchObject( $revisions ) ) {
1806                         if( $rev_name != '' && $rev_name != $row->rev_user_text ) {
1807                                 $all_same_user = false;
1808                         } else {
1809                                 $rev_name = $row->rev_user_text;
1810                         }
1811                 }
1812
1813                 if( !is_null( $rev ) ) {
1814                         # if this is a mini-text, we can paste part of it into the deletion reason
1815                         $text = $rev->getText();
1816
1817                         #if this is empty, an earlier revision may contain "useful" text
1818                         $blanked = false;
1819                         if( $text == '' ) {
1820                                 $prev = $rev->getPrevious();
1821                                 if( $prev ) {
1822                                         $text = $prev->getText();
1823                                         $blanked = true;
1824                                 }
1825                         }
1826
1827                         $length = strlen( $text );
1828
1829                         # this should not happen, since it is not possible to store an empty, new
1830                         # page. Let's insert a standard text in case it does, though
1831                         if( $length == 0 && $reason === '' ) {
1832                                 $reason = wfMsgForContent( 'exblank' );
1833                         }
1834
1835                         if( $length < 500 && $reason === '' ) {
1836                                 # comment field=255, let's grep the first 150 to have some user
1837                                 # space left
1838                                 global $wgContLang;
1839                                 $text = $wgContLang->truncate( $text, 150, '...' );
1840
1841                                 # let's strip out newlines
1842                                 $text = preg_replace( "/[\n\r]/", '', $text );
1843
1844                                 if( !$blanked ) {
1845                                         if( !$all_same_user ) {
1846                                                 $reason = wfMsgForContent( 'excontent', $text );
1847                                         } else {
1848                                                 $reason = wfMsgForContent( 'excontentauthor', $text, $rev_name );
1849                                         }
1850                                 } else {
1851                                         $reason = wfMsgForContent( 'exbeforeblank', $text );
1852                                 }
1853                         }
1854                 }
1855
1856                 return $this->confirmDelete( '', $reason );
1857         }
1858
1859         /**
1860          * Output deletion confirmation dialog
1861          */
1862         function confirmDelete( $par, $reason ) {
1863                 global $wgOut, $wgUser;
1864
1865                 wfDebug( "Article::confirmDelete\n" );
1866
1867                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1868                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1869                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1870                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1871
1872                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1873
1874                 $confirm = htmlspecialchars( wfMsg( 'deletepage' ) );
1875                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1876                 $token = htmlspecialchars( $wgUser->editToken() );
1877
1878                 $wgOut->addHTML( "
1879 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1880         <table border='0'>
1881                 <tr>
1882                         <td align='right'>
1883                                 <label for='wpReason'>{$delcom}:</label>
1884                         </td>
1885                         <td align='left'>
1886                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1887                         </td>
1888                 </tr>
1889                 <tr>
1890                         <td>&nbsp;</td>
1891                         <td>
1892                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1893                         </td>
1894                 </tr>
1895         </table>
1896         <input type='hidden' name='wpEditToken' value=\"{$token}\" />
1897 </form>\n" );
1898
1899                 $wgOut->returnToMain( false );
1900         }
1901
1902
1903         /**
1904          * Perform a deletion and output success or failure messages
1905          */
1906         function doDelete( $reason ) {
1907                 global $wgOut, $wgUser, $wgContLang;
1908                 $fname = 'Article::doDelete';
1909                 wfDebug( $fname."\n" );
1910
1911                 if (wfRunHooks('ArticleDelete', array(&$this, &$wgUser, &$reason))) {
1912                         if ( $this->doDeleteArticle( $reason ) ) {
1913                                 $deleted = $this->mTitle->getPrefixedText();
1914
1915                                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1916                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1917
1918                                 $loglink = '[[Special:Log/delete|' . wfMsg( 'deletionlog' ) . ']]';
1919                                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
1920
1921                                 $wgOut->addWikiText( $text );
1922                                 $wgOut->returnToMain( false );
1923                                 wfRunHooks('ArticleDeleteComplete', array(&$this, &$wgUser, $reason));
1924                         } else {
1925                                 $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1926                         }
1927                 }
1928         }
1929
1930         /**
1931          * Back-end article deletion
1932          * Deletes the article with database consistency, writes logs, purges caches
1933          * Returns success
1934          */
1935         function doDeleteArticle( $reason ) {
1936                 global $wgUser;
1937                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer, $wgPostCommitUpdateList;
1938                 global $wgUseTrackbacks;
1939
1940                 $fname = 'Article::doDeleteArticle';
1941                 wfDebug( $fname."\n" );
1942
1943                 $dbw =& wfGetDB( DB_MASTER );
1944                 $ns = $this->mTitle->getNamespace();
1945                 $t = $this->mTitle->getDBkey();
1946                 $id = $this->mTitle->getArticleID();
1947
1948                 if ( $t == '' || $id == 0 ) {
1949                         return false;
1950                 }
1951
1952                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ), -1 );
1953                 array_push( $wgDeferredUpdateList, $u );
1954
1955                 $linksTo = $this->mTitle->getLinksTo();
1956
1957                 # Squid purging
1958                 if ( $wgUseSquid ) {
1959                         $urls = array(
1960                                 $this->mTitle->getInternalURL(),
1961                                 $this->mTitle->getInternalURL( 'history' )
1962                         );
1963
1964                         $u = SquidUpdate::newFromTitles( $linksTo, $urls );
1965                         array_push( $wgPostCommitUpdateList, $u );
1966
1967                 }
1968
1969                 # Client and file cache invalidation
1970                 Title::touchArray( $linksTo );
1971
1972
1973                 // For now, shunt the revision data into the archive table.
1974                 // Text is *not* removed from the text table; bulk storage
1975                 // is left intact to avoid breaking block-compression or
1976                 // immutable storage schemes.
1977                 //
1978                 // For backwards compatibility, note that some older archive
1979                 // table entries will have ar_text and ar_flags fields still.
1980                 //
1981                 // In the future, we may keep revisions and mark them with
1982                 // the rev_deleted field, which is reserved for this purpose.
1983                 $dbw->insertSelect( 'archive', array( 'page', 'revision' ),
1984                         array(
1985                                 'ar_namespace'  => 'page_namespace',
1986                                 'ar_title'      => 'page_title',
1987                                 'ar_comment'    => 'rev_comment',
1988                                 'ar_user'       => 'rev_user',
1989                                 'ar_user_text'  => 'rev_user_text',
1990                                 'ar_timestamp'  => 'rev_timestamp',
1991                                 'ar_minor_edit' => 'rev_minor_edit',
1992                                 'ar_rev_id'     => 'rev_id',
1993                                 'ar_text_id'    => 'rev_text_id',
1994                         ), array(
1995                                 'page_id' => $id,
1996                                 'page_id = rev_page'
1997                         ), $fname
1998                 );
1999
2000                 # Now that it's safely backed up, delete it
2001                 $dbw->delete( 'revision', array( 'rev_page' => $id ), $fname );
2002                 $dbw->delete( 'page', array( 'page_id' => $id ), $fname);
2003
2004                 if ($wgUseTrackbacks)
2005                         $dbw->delete( 'trackbacks', array( 'tb_page' => $id ), $fname );
2006
2007                 # Clean up recentchanges entries...
2008                 $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), $fname );
2009
2010                 # Finally, clean up the link tables
2011                 $t = $this->mTitle->getPrefixedDBkey();
2012
2013                 Article::onArticleDelete( $this->mTitle );
2014
2015                 # Delete outgoing links
2016                 $dbw->delete( 'pagelinks', array( 'pl_from' => $id ) );
2017                 $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
2018                 $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
2019
2020                 # Log the deletion
2021                 $log = new LogPage( 'delete' );
2022                 $log->addEntry( 'delete', $this->mTitle, $reason );
2023
2024                 # Clear the cached article id so the interface doesn't act like we exist
2025                 $this->mTitle->resetArticleID( 0 );
2026                 $this->mTitle->mArticleID = 0;
2027                 return true;
2028         }
2029
2030         /**
2031          * Revert a modification
2032          */
2033         function rollback() {
2034                 global $wgUser, $wgOut, $wgRequest;
2035                 $fname = 'Article::rollback';
2036
2037                 if ( ! $wgUser->isAllowed('rollback') ) {
2038                         $wgOut->sysopRequired();
2039                         return;
2040                 }
2041                 if ( wfReadOnly() ) {
2042                         $wgOut->readOnlyPage( $this->getContent( true ) );
2043                         return;
2044                 }
2045                 if( !$wgUser->matchEditToken( $wgRequest->getVal( 'token' ),
2046                         array( $this->mTitle->getPrefixedText(),
2047                                 $wgRequest->getVal( 'from' ) )  ) ) {
2048                         $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
2049                         $wgOut->addWikiText( wfMsg( 'sessionfailure' ) );
2050                         return;
2051                 }
2052                 $dbw =& wfGetDB( DB_MASTER );
2053
2054                 # Enhanced rollback, marks edits rc_bot=1
2055                 $bot = $wgRequest->getBool( 'bot' );
2056
2057                 # Replace all this user's current edits with the next one down
2058                 $tt = $this->mTitle->getDBKey();
2059                 $n = $this->mTitle->getNamespace();
2060
2061                 # Get the last editor, lock table exclusively
2062                 $dbw->begin();
2063                 $current = Revision::newFromTitle( $this->mTitle );
2064                 if( is_null( $current ) ) {
2065                         # Something wrong... no page?
2066                         $dbw->rollback();
2067                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
2068                         return;
2069                 }
2070
2071                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
2072                 if( $from != $current->getUserText() ) {
2073                         $wgOut->setPageTitle( wfMsg('rollbackfailed') );
2074                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
2075                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
2076                                 htmlspecialchars( $from ),
2077                                 htmlspecialchars( $current->getUserText() ) ) );
2078                         if( $current->getComment() != '') {
2079                                 $wgOut->addHTML(
2080                                         wfMsg( 'editcomment',
2081                                         htmlspecialchars( $current->getComment() ) ) );
2082                         }
2083                         return;
2084                 }
2085
2086                 # Get the last edit not by this guy
2087                 $user = intval( $current->getUser() );
2088                 $user_text = $dbw->addQuotes( $current->getUserText() );
2089                 $s = $dbw->selectRow( 'revision',
2090                         array( 'rev_id', 'rev_timestamp' ),
2091                         array(
2092                                 'rev_page' => $current->getPage(),
2093                                 "rev_user <> {$user} OR rev_user_text <> {$user_text}"
2094                         ), $fname,
2095                         array(
2096                                 'USE INDEX' => 'page_timestamp',
2097                                 'ORDER BY'  => 'rev_timestamp DESC' )
2098                         );
2099                 if( $s === false ) {
2100                         # Something wrong
2101                         $dbw->rollback();
2102                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
2103                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
2104                         return;
2105                 }
2106
2107                 if ( $bot ) {
2108                         # Mark all reverted edits as bot
2109                         $dbw->update( 'recentchanges',
2110                                 array( /* SET */
2111                                         'rc_bot' => 1
2112                                 ), array( /* WHERE */
2113                                         'rc_cur_id'    => $current->getPage(),
2114                                         'rc_user_text' => $current->getUserText(),
2115                                         "rc_timestamp > '{$s->rev_timestamp}'",
2116                                 ), $fname
2117                         );
2118                 }
2119
2120                 # Save it!
2121                 $target = Revision::newFromId( $s->rev_id );
2122                 $newcomment = wfMsgForContent( 'revertpage', $target->getUserText(), $from );
2123
2124                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
2125                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
2126                 $wgOut->addHTML( '<h2>' . htmlspecialchars( $newcomment ) . "</h2>\n<hr />\n" );
2127
2128                 $this->updateArticle( $target->getText(), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
2129                 Article::onArticleEdit( $this->mTitle );
2130
2131                 $dbw->commit();
2132                 $wgOut->returnToMain( false );
2133         }
2134
2135
2136         /**
2137          * Do standard deferred updates after page view
2138          * @private
2139          */
2140         function viewUpdates() {
2141                 global $wgDeferredUpdateList, $wgUseEnotif;
2142
2143                 if ( 0 != $this->getID() ) {
2144                         global $wgDisableCounters;
2145                         if( !$wgDisableCounters ) {
2146                                 Article::incViewCount( $this->getID() );
2147                                 $u = new SiteStatsUpdate( 1, 0, 0 );
2148                                 array_push( $wgDeferredUpdateList, $u );
2149                         }
2150                 }
2151
2152                 # Update newtalk status if user is reading their own
2153                 # talk page
2154
2155                 global $wgUser;
2156                 if ($this->mTitle->getNamespace() == NS_USER_TALK &&
2157                         $this->mTitle->getText() == $wgUser->getName())
2158                 {
2159                         if ( $wgUseEnotif ) {
2160                                 require_once( 'UserTalkUpdate.php' );
2161                                 $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(), $this->mTitle->getDBkey(), false, false, false );
2162                         } else {
2163                                 $wgUser->setNewtalk(0);
2164                                 $wgUser->saveNewtalk();
2165                         }
2166                 } elseif ( $wgUseEnotif ) {
2167                         $wgUser->clearNotification( $this->mTitle );
2168                 }
2169
2170         }
2171
2172         /**
2173          * Do standard deferred updates after page edit.
2174          * Every 1000th edit, prune the recent changes table.
2175          * @private
2176          * @param string $text
2177          */
2178         function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange) {
2179                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
2180                 global $wgMessageCache, $wgUser, $wgUseEnotif;
2181
2182                 if ( wfRunHooks( 'ArticleEditUpdatesDeleteFromRecentchanges', &$this ) ) {
2183                         wfSeedRandom();
2184                         if ( 0 == mt_rand( 0, 999 ) ) {
2185                                 # Periodically flush old entries from the recentchanges table.
2186                                 global $wgRCMaxAge;
2187
2188                                 $dbw =& wfGetDB( DB_MASTER );
2189                                 $cutoff = $dbw->timestamp( time() - $wgRCMaxAge );
2190                                 $recentchanges = $dbw->tableName( 'recentchanges' );
2191                                 $sql = "DELETE FROM $recentchanges WHERE rc_timestamp < '{$cutoff}'";
2192                                 $dbw->query( $sql );
2193                         }
2194                 }
2195
2196                 $id = $this->getID();
2197                 $title = $this->mTitle->getPrefixedDBkey();
2198                 $shortTitle = $this->mTitle->getDBkey();
2199
2200                 if ( 0 != $id ) {
2201                         $u = new LinksUpdate( $id, $title );
2202                         array_push( $wgDeferredUpdateList, $u );
2203                         $u = new SiteStatsUpdate( 0, 1, $this->mGoodAdjustment, $this->mTotalAdjustment );
2204                         array_push( $wgDeferredUpdateList, $u );
2205                         $u = new SearchUpdate( $id, $title, $text );
2206                         array_push( $wgDeferredUpdateList, $u );
2207
2208                         # If this is another user's talk page, update newtalk
2209
2210                         if ($this->mTitle->getNamespace() == NS_USER_TALK && $shortTitle != $wgUser->getName()) {
2211                                 if ( $wgUseEnotif ) {
2212                                         require_once( 'UserTalkUpdate.php' );
2213                                         $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle, $summary,
2214                                           $minoredit, $timestamp_of_pagechange);
2215                                 } else {
2216                                         $other = User::newFromName( $shortTitle );
2217                                         if( is_null( $other ) && User::isIP( $shortTitle ) ) {
2218                                                 // An anonymous user
2219                                                 $other = new User();
2220                                                 $other->setName( $shortTitle );
2221                                         }
2222                                         if( $other ) {
2223                                                 $other->setNewtalk(1);
2224                                                 $other->saveNewtalk();
2225                                         }
2226                                 }
2227                         }
2228
2229                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
2230                                 $wgMessageCache->replace( $shortTitle, $text );
2231                         }
2232                 }
2233         }
2234
2235         /**
2236          * @todo document this function
2237          * @private
2238          * @param string $oldid         Revision ID of this article revision
2239          */
2240         function setOldSubtitle( $oldid=0 ) {
2241                 global $wgLang, $wgOut, $wgUser;
2242
2243                 $current = ( $oldid == $this->mLatest );
2244                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
2245                 $sk = $wgUser->getSkin();
2246                 $lnk = $current
2247                         ? wfMsg( 'currentrevisionlink' )
2248                         : $lnk = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
2249                 $prevlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid );
2250                 $nextlink = $current
2251                         ? wfMsg( 'nextrevision' )
2252                         : $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
2253                 $r = wfMsg( 'revisionasofwithlink', $td, $lnk, $prevlink, $nextlink );
2254                 $wgOut->setSubtitle( $r );
2255         }
2256
2257         /**
2258          * This function is called right before saving the wikitext,
2259          * so we can do things like signatures and links-in-context.
2260          *
2261          * @param string $text
2262          */
2263         function preSaveTransform( $text ) {
2264                 global $wgParser, $wgUser;
2265                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
2266         }
2267
2268         /* Caching functions */
2269
2270         /**
2271          * checkLastModified returns true if it has taken care of all
2272          * output to the client that is necessary for this request.
2273          * (that is, it has sent a cached version of the page)
2274          */
2275         function tryFileCache() {
2276                 static $called = false;
2277                 if( $called ) {
2278                         wfDebug( " tryFileCache() -- called twice!?\n" );
2279                         return;
2280                 }
2281                 $called = true;
2282                 if($this->isFileCacheable()) {
2283                         $touched = $this->mTouched;
2284                         $cache = new CacheManager( $this->mTitle );
2285                         if($cache->isFileCacheGood( $touched )) {
2286                                 global $wgOut;
2287                                 wfDebug( " tryFileCache() - about to load\n" );
2288                                 $cache->loadFromFileCache();
2289                                 return true;
2290                         } else {
2291                                 wfDebug( " tryFileCache() - starting buffer\n" );
2292                                 ob_start( array(&$cache, 'saveToFileCache' ) );
2293                         }
2294                 } else {
2295                         wfDebug( " tryFileCache() - not cacheable\n" );
2296                 }
2297         }
2298
2299         /**
2300          * Check if the page can be cached
2301          * @return bool
2302          */
2303         function isFileCacheable() {
2304                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
2305                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
2306
2307                 return $wgUseFileCache
2308                         and (!$wgShowIPinHeader)
2309                         and ($this->getID() != 0)
2310                         and ($wgUser->isAnon())
2311                         and (!$wgUser->getNewtalk())
2312                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
2313                         and (empty( $action ) || $action == 'view')
2314                         and (!isset($oldid))
2315                         and (!isset($diff))
2316                         and (!isset($redirect))
2317                         and (!isset($printable))
2318                         and (!$this->mRedirectedFrom);
2319         }
2320
2321         /**
2322          * Loads cur_touched and returns a value indicating if it should be used
2323          *
2324          */
2325         function checkTouched() {
2326                 $fname = 'Article::checkTouched';
2327                 if( !$this->mDataLoaded ) {
2328                         $dbr =& $this->getDB();
2329                         $data = $this->pageDataFromId( $dbr, $this->getId() );
2330                         if( $data ) {
2331                                 $this->loadPageData( $data );
2332                         }
2333                 }
2334                 return !$this->mIsRedirect;
2335         }
2336
2337         /**
2338          * Edit an article without doing all that other stuff
2339          * The article must already exist; link tables etc
2340          * are not updated, caches are not flushed.
2341          *
2342          * @param string $text text submitted
2343          * @param string $comment comment submitted
2344          * @param bool $minor whereas it's a minor modification
2345          */
2346         function quickEdit( $text, $comment = '', $minor = 0 ) {
2347                 $fname = 'Article::quickEdit';
2348                 wfProfileIn( $fname );
2349
2350                 $dbw =& wfGetDB( DB_MASTER );
2351                 $dbw->begin();
2352                 $revision = new Revision( array(
2353                         'page'       => $this->getId(),
2354                         'text'       => $text,
2355                         'comment'    => $comment,
2356                         'minor_edit' => $minor ? 1 : 0,
2357                         ) );
2358                 $revisionId = $revision->insertOn( $dbw );
2359                 $this->updateRevisionOn( $dbw, $revision );
2360                 $dbw->commit();
2361
2362                 wfProfileOut( $fname );
2363         }
2364
2365         /**
2366          * Used to increment the view counter
2367          *
2368          * @static
2369          * @param integer $id article id
2370          */
2371         function incViewCount( $id ) {
2372                 $id = intval( $id );
2373                 global $wgHitcounterUpdateFreq;
2374
2375                 $dbw =& wfGetDB( DB_MASTER );
2376                 $pageTable = $dbw->tableName( 'page' );
2377                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
2378                 $acchitsTable = $dbw->tableName( 'acchits' );
2379
2380                 if( $wgHitcounterUpdateFreq <= 1 ){ //
2381                         $dbw->query( "UPDATE $pageTable SET page_counter = page_counter + 1 WHERE page_id = $id" );
2382                         return;
2383                 }
2384
2385                 # Not important enough to warrant an error page in case of failure
2386                 $oldignore = $dbw->ignoreErrors( true );
2387
2388                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2389
2390                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2391                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2392                         # Most of the time (or on SQL errors), skip row count check
2393                         $dbw->ignoreErrors( $oldignore );
2394                         return;
2395                 }
2396
2397                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2398                 $row = $dbw->fetchObject( $res );
2399                 $rown = intval( $row->n );
2400                 if( $rown >= $wgHitcounterUpdateFreq ){
2401                         wfProfileIn( 'Article::incViewCount-collect' );
2402                         $old_user_abort = ignore_user_abort( true );
2403
2404                         $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2405                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable TYPE=HEAP ".
2406                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2407                                 'GROUP BY hc_id');
2408                         $dbw->query("DELETE FROM $hitcounterTable");
2409                         $dbw->query('UNLOCK TABLES');
2410                         $dbw->query("UPDATE $pageTable,$acchitsTable SET page_counter=page_counter + hc_n ".
2411                                 'WHERE page_id = hc_id');
2412                         $dbw->query("DROP TABLE $acchitsTable");
2413
2414                         ignore_user_abort( $old_user_abort );
2415                         wfProfileOut( 'Article::incViewCount-collect' );
2416                 }
2417                 $dbw->ignoreErrors( $oldignore );
2418         }
2419
2420         /**#@+
2421          * The onArticle*() functions are supposed to be a kind of hooks
2422          * which should be called whenever any of the specified actions
2423          * are done.
2424          *
2425          * This is a good place to put code to clear caches, for instance.
2426          *
2427          * This is called on page move and undelete, as well as edit
2428          * @static
2429          * @param $title_obj a title object
2430          */
2431
2432         function onArticleCreate($title_obj) {
2433                 global $wgUseSquid, $wgPostCommitUpdateList;
2434
2435                 $title_obj->touchLinks();
2436                 $titles = $title_obj->getLinksTo();
2437
2438                 # Purge squid
2439                 if ( $wgUseSquid ) {
2440                         $urls = $title_obj->getSquidURLs();
2441                         foreach ( $titles as $linkTitle ) {
2442                                 $urls[] = $linkTitle->getInternalURL();
2443                         }
2444                         $u = new SquidUpdate( $urls );
2445                         array_push( $wgPostCommitUpdateList, $u );
2446                 }
2447         }
2448
2449         function onArticleDelete( $title ) {
2450                 global $wgMessageCache;
2451
2452                 $title->touchLinks();
2453
2454                 if( $title->getNamespace() == NS_MEDIAWIKI) {
2455                         $wgMessageCache->replace( $title->getDBkey(), false );
2456                 }
2457         }
2458
2459         function onArticleEdit($title_obj) {
2460                 // This would be an appropriate place to purge caches.
2461                 // Why's this not in here now?
2462         }
2463
2464         /**#@-*/
2465
2466         /**
2467          * Info about this page
2468          * Called for ?action=info when $wgAllowPageInfo is on.
2469          *
2470          * @access public
2471          */
2472         function info() {
2473                 global $wgLang, $wgOut, $wgAllowPageInfo, $wgUser;
2474                 $fname = 'Article::info';
2475
2476                 if ( !$wgAllowPageInfo ) {
2477                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
2478                         return;
2479                 }
2480
2481                 $page = $this->mTitle->getSubjectPage();
2482
2483                 $wgOut->setPagetitle( $page->getPrefixedText() );
2484                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
2485
2486                 # first, see if the page exists at all.
2487                 $exists = $page->getArticleId() != 0;
2488                 if( !$exists ) {
2489                         $wgOut->addHTML( wfMsg( $wgUser->isLoggedIn() ? 'noarticletext' : 'noarticletextanon' ) );
2490                 } else {
2491                         $dbr =& $this->getDB( DB_SLAVE );
2492                         $wl_clause = array(
2493                                 'wl_title'     => $page->getDBkey(),
2494                                 'wl_namespace' => $page->getNamespace() );
2495                         $numwatchers = $dbr->selectField(
2496                                 'watchlist',
2497                                 'COUNT(*)',
2498                                 $wl_clause,
2499                                 $fname,
2500                                 $this->getSelectOptions() );
2501
2502                         $pageInfo = $this->pageCountInfo( $page );
2503                         $talkInfo = $this->pageCountInfo( $page->getTalkPage() );
2504
2505                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $wgLang->formatNum( $numwatchers ) ) . '</li>' );
2506                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $wgLang->formatNum( $pageInfo['edits'] ) ) . '</li>');
2507                         if( $talkInfo ) {
2508                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $wgLang->formatNum( $talkInfo['edits'] ) ) . '</li>');
2509                         }
2510                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $wgLang->formatNum( $pageInfo['authors'] ) ) . '</li>' );
2511                         if( $talkInfo ) {
2512                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $wgLang->formatNum( $talkInfo['authors'] ) ) . '</li>' );
2513                         }
2514                         $wgOut->addHTML( '</ul>' );
2515
2516                 }
2517         }
2518
2519         /**
2520          * Return the total number of edits and number of unique editors
2521          * on a given page. If page does not exist, returns false.
2522          *
2523          * @param Title $title
2524          * @return array
2525          * @access private
2526          */
2527         function pageCountInfo( $title ) {
2528                 $id = $title->getArticleId();
2529                 if( $id == 0 ) {
2530                         return false;
2531                 }
2532
2533                 $dbr =& $this->getDB( DB_SLAVE );
2534
2535                 $rev_clause = array( 'rev_page' => $id );
2536                 $fname = 'Article::pageCountInfo';
2537
2538                 $edits = $dbr->selectField(
2539                         'revision',
2540                         'COUNT(rev_page)',
2541                         $rev_clause,
2542                         $fname,
2543                         $this->getSelectOptions() );
2544
2545                 $authors = $dbr->selectField(
2546                         'revision',
2547                         'COUNT(DISTINCT rev_user_text)',
2548                         $rev_clause,
2549                         $fname,
2550                         $this->getSelectOptions() );
2551
2552                 return array( 'edits' => $edits, 'authors' => $authors );
2553         }
2554
2555         /**
2556          * Return a list of templates used by this article.
2557          * Uses the links table to find the templates
2558          *
2559          * @return array
2560          */
2561         function getUsedTemplates() {
2562                 $result = array();
2563                 $id = $this->mTitle->getArticleID();
2564
2565                 $db =& wfGetDB( DB_SLAVE );
2566                 $res = $db->select( array( 'pagelinks' ),
2567                         array( 'pl_title' ),
2568                         array(
2569                                 'pl_from' => $id,
2570                                 'pl_namespace' => NS_TEMPLATE ),
2571                         'Article:getUsedTemplates' );
2572                 if ( false !== $res ) {
2573                         if ( $db->numRows( $res ) ) {
2574                                 while ( $row = $db->fetchObject( $res ) ) {
2575                                         $result[] = $row->pl_title;
2576                                 }
2577                         }
2578                 }
2579                 $db->freeResult( $res );
2580                 return $result;
2581         }
2582 }
2583
2584 ?>