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