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 Wikipedia article and history.
  18  *
  19  * See design.doc 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, $mCountAdjustment;
  32         var $mMinorEdit, $mRedirectedFrom;
  33         var $mTouched, $mFileCache, $mTitle;
  34         var $mId, $mTable;
  35         var $mForUpdate;
  36         var $mOldId;
  37         /**#@-*/
  38
  39         /**
  40          * Constructor and clear the article
  41          * @param mixed &$title
  42          */
  43         function Article( &$title ) {
  44                 $this->mTitle =& $title;
  45                 $this->clear();
  46         }
  47
  48         /**
  49          * get the title object of the article
  50          * @public
  51          */
  52         function getTitle() {
  53                 return $this->mTitle;
  54         }
  55
  56         /**
  57           * Clear the object
  58           * @private
  59           */
  60         function clear() {
  61                 $this->mContentLoaded = false;
  62                 $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
  63                 $this->mRedirectedFrom = $this->mUserText =
  64                 $this->mTimestamp = $this->mComment = $this->mFileCache = '';
  65                 $this->mCountAdjustment = 0;
  66                 $this->mTouched = '19700101000000';
  67                 $this->mForUpdate = false;
  68         }
  69
  70         /**
  71          * Note that getContent/loadContent may follow redirects if
  72          * not told otherwise, and so may cause a change to mTitle.
  73          *
  74          * @param $noredir
  75          * @return Return the text of this revision
  76         */
  77         function getContent( $noredir ) {
  78                 global $wgRequest;
  79
  80                 # Get variables from query string :P
  81                 $action = $wgRequest->getText( 'action', 'view' );
  82                 $section = $wgRequest->getText( 'section' );
  83
  84                 $fname =  'Article::getContent';
  85                 wfProfileIn( $fname );
  86
  87                 if ( 0 == $this->getID() ) {
  88                         if ( 'edit' == $action ) {
  89                                 wfProfileOut( $fname );
  90                                 return ''; # was "newarticletext", now moved above the box)
  91                         }
  92                         wfProfileOut( $fname );
  93                         return wfMsg( 'noarticletext' );
  94                 } else {
  95                         $this->loadContent( $noredir );
  96                         # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
  97                         if ( $this->mTitle->getNamespace() == NS_USER_TALK &&
  98                           preg_match('/^\d{1,3}\.\d{1,3}.\d{1,3}\.\d{1,3}$/',$this->mTitle->getText()) &&
  99                           $action=='view'
 100                         ) {
 101                                 wfProfileOut( $fname );
 102                                 return $this->mContent . "\n" .wfMsg('anontalkpagetext');
 103                         } else {
 104                                 if($action=='edit') {
 105                                         if($section!='') {
 106                                                 if($section=='new') {
 107                                                         wfProfileOut( $fname );
 108                                                         return '';
 109                                                 }
 110
 111                                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 112                                                 # comments to be stripped as well)
 113                                                 $rv=$this->getSection($this->mContent,$section);
 114                                                 wfProfileOut( $fname );
 115                                                 return $rv;
 116                                         }
 117                                 }
 118                                 wfProfileOut( $fname );
 119                                 return $this->mContent;
 120                         }
 121                 }
 122         }
 123
 124         /**
 125          * This function returns the text of a section, specified by a number ($section).
 126          * A section is text under a heading like == Heading == or <h1>Heading</h1>, or
 127          * the first section before any such heading (section 0).
 128          *
 129          * If a section contains subsections, these are also returned.
 130          *
 131          * @param string $text text to look in
 132          * @param integer $section section number
 133          * @return string text of the requested section
 134          */
 135         function getSection($text,$section) {
 136
 137                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 138                 # comments to be stripped as well)
 139                 $striparray=array();
 140                 $parser=new Parser();
 141                 $parser->mOutputType=OT_WIKI;
 142                 $striptext=$parser->strip($text, $striparray, true);
 143
 144                 # now that we can be sure that no pseudo-sections are in the source,
 145                 # split it up by section
 146                 $secs =
 147                   preg_split(
 148                   '/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 149                   $striptext, -1,
 150                   PREG_SPLIT_DELIM_CAPTURE);
 151                 if($section==0) {
 152                         $rv=$secs[0];
 153                 } else {
 154                         $headline=$secs[$section*2-1];
 155                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 156                         $hlevel=$matches[1];
 157
 158                         # translate wiki heading into level
 159                         if(strpos($hlevel,'=')!==false) {
 160                                 $hlevel=strlen($hlevel);
 161                         }
 162
 163                         $rv=$headline. $secs[$section*2];
 164                         $count=$section+1;
 165
 166                         $break=false;
 167                         while(!empty($secs[$count*2-1]) && !$break) {
 168
 169                                 $subheadline=$secs[$count*2-1];
 170                                 preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 171                                 $subhlevel=$matches[1];
 172                                 if(strpos($subhlevel,'=')!==false) {
 173                                         $subhlevel=strlen($subhlevel);
 174                                 }
 175                                 if($subhlevel > $hlevel) {
 176                                         $rv.=$subheadline.$secs[$count*2];
 177                                 }
 178                                 if($subhlevel <= $hlevel) {
 179                                         $break=true;
 180                                 }
 181                                 $count++;
 182
 183                         }
 184                 }
 185                 # reinsert stripped tags
 186                 $rv=$parser->unstrip($rv,$striparray);
 187                 $rv=$parser->unstripNoWiki($rv,$striparray);
 188                 $rv=trim($rv);
 189                 return $rv;
 190
 191         }
 192
 193         /**
 194          * Return an array of the columns of the "cur"-table
 195          */
 196         function getContentFields() {
 197                 return $wgArticleContentFields = array(
 198                   'old_text','old_flags',
 199                   'rev_timestamp','rev_user', 'rev_user_text', 'rev_comment','page_counter',
 200                   'page_namespace', 'page_title', 'page_restrictions','page_touched','page_is_redirect' );
 201         }
 202
 203         /**
 204          * Return the oldid of the article that is to be shown.
 205          * For requests with a "direction", this is not the oldid of the
 206          * query
 207          */
 208         function getOldID() {
 209                 global $wgRequest, $wgOut;
 210                 static $lastid;
 211
 212                 if ( isset( $lastid ) ) {
 213                         return $lastid;
 214                 }
 215                 # Query variables :P
 216                 $oldid = $wgRequest->getVal( 'oldid' );
 217                 if ( isset( $oldid ) ) {
 218                         $dbr =& $this->getDB();
 219                         $oldid = IntVal( $oldid );
 220                         if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 221                                 $nextid = $this->mTitle->getNextRevisionID( $oldid );
 222                                 if ( $nextid  ) {
 223                                         $oldid = $nextid;
 224                                 } else {
 225                                         $wgOut->redirect( $this->mTitle->getFullURL( 'redirect=no' ) );
 226                                 }
 227                         } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 228                                 $previd = $this->mTitle->getPreviousRevisionID( $oldid );
 229                                 if ( $previd ) {
 230                                         $oldid = $previd;
 231                                 } else {
 232                                         # TODO
 233                                 }
 234                         }
 235                         $lastid = $oldid;
 236                 }
 237                 return @$oldid; # "@" to be able to return "unset" without PHP complaining
 238         }
 239
 240
 241         /**
 242          * Load the revision (including cur_text) into this object
 243          */
 244         function loadContent( $noredir = false ) {
 245                 global $wgOut, $wgRequest;
 246
 247                 if ( $this->mContentLoaded ) return;
 248
 249                 $dbr =& $this->getDB();
 250                 # Query variables :P
 251                 $oldid = $this->getOldID();
 252                 $redirect = $wgRequest->getVal( 'redirect' );
 253
 254                 $fname = 'Article::loadContent';
 255
 256                 # Pre-fill content with error message so that if something
 257                 # fails we'll have something telling us what we intended.
 258
 259                 $t = $this->mTitle->getPrefixedText();
 260
 261                 $noredir = $noredir || ($wgRequest->getVal( 'redirect' ) == 'no');
 262                 $this->mOldId = $oldid;
 263                 $this->fetchContent( $oldid, $noredir, true );
 264         }
 265
 266         /**
 267          * @param int $oldid 0 for whatever the latest revision is
 268          * @param bool $noredir Set to true to avoid following redirects
 269          * @param bool $globalTitle Set to true to change the global $wgTitle object when following redirects or other unexpected title changes
 270          * @return string
 271          */
 272         function fetchContent( $oldid = 0, $noredir = false, $globalTitle = false ) {
 273                 if ( $this->mContentLoaded ) {
 274                         return $this->mContent;
 275                 }
 276                 $dbr =& $this->getDB();
 277                 $fname = 'Article::fetchContent';
 278
 279                 # Pre-fill content with error message so that if something
 280                 # fails we'll have something telling us what we intended.
 281                 $t = $this->mTitle->getPrefixedText();
 282                 if( $oldid ) {
 283                         $t .= ',oldid='.$oldid;
 284                 }
 285                 if( isset( $redirect ) ) {
 286                         $redirect = ($redirect == 'no') ? 'no' : 'yes';
 287                         $t .= ',redirect='.$redirect;
 288                 }
 289                 $this->mContent = wfMsg( 'missingarticle', $t );
 290
 291                 if( !$oldid ) {
 292                         # Retrieve current version
 293                         $id = $this->getID();
 294                         if ( 0 == $id ) {
 295                                 return false;
 296                         }
 297
 298                         $s = $dbr->selectRow( array( 'text', 'revision', 'page' ),
 299                                 $this->getContentFields(),
 300                                 "page_id='$id' AND rev_page=page_id AND rev_id=page_latest AND old_id=rev_id",
 301                                 $fname, $this->getSelectOptions() );
 302                 } else {
 303                         # Historical revision
 304                         $s = $dbr->selectRow( array( 'text', 'revision', 'page' ),
 305                                 $this->getContentFields(),
 306                                 "rev_page=page_id AND rev_id='$oldid' AND old_id=rev_id",
 307                                 $fname, $this->getSelectOptions() );
 308                 }
 309                 if ( $s === false ) {
 310                         return false;
 311                 }
 312
 313                 # If we got a redirect, follow it (unless we've been told
 314                 # not to by either the function parameter or the query
 315                 if ( !$oldid && !$noredir ) {
 316                         $rt = Title::newFromRedirect( Revision::getRevisionText( $s ) );
 317                         # process if title object is valid and not special:userlogout
 318                         if ( $rt && ! ( $rt->getNamespace() == NS_SPECIAL && $rt->getText() == 'Userlogout' ) ) {
 319                                 # Gotta hand redirects to special pages differently:
 320                                 # Fill the HTTP response "Location" header and ignore
 321                                 # the rest of the page we're on.
 322                                 if( $globalTitle ) {
 323                                         global $wgOut;
 324                                         if ( $rt->getInterwiki() != '' ) {
 325                                                 $wgOut->redirect( $rt->getFullURL() ) ;
 326                                                 return false;
 327                                         }
 328                                         if ( $rt->getNamespace() == NS_SPECIAL ) {
 329                                                 $wgOut->redirect( $rt->getFullURL() );
 330                                                 return false;
 331                                         }
 332                                 }
 333                                 $rid = $rt->getArticleID();
 334                                 if ( 0 != $rid ) {
 335                                         $redirRow = $dbr->selectRow( array( 'text', 'revision', 'page' ),
 336                                                 $this->getContentFields(),
 337                                                 "page_id='$rid' AND rev_page=page_id AND rev_id=page_latest AND old_id=rev_id",
 338                                                 $fname, $this->getSelectOptions() );
 339
 340                                         if ( $redirRow !== false ) {
 341                                                 $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 342                                                 $this->mTitle = $rt;
 343                                                 $s = $redirRow;
 344                                         }
 345                                 }
 346                         }
 347                 }
 348
 349                 # if the title's different from expected, update...
 350                 if( $globalTitle &&
 351                         ( $this->mTitle->getNamespace() != $s->page_namespace ||
 352                         $this->mTitle->getDBkey() != $s->page_title ) ) {
 353                         $oldTitle = Title::makeTitle( $s->page_namesapce, $s->page_title );
 354                         $this->mTitle = $oldTitle;
 355                         global $wgTitle;
 356                         $wgTitle = $oldTitle;
 357                 }
 358
 359                 # Back to the business at hand...
 360                 $this->mCounter = $s->page_counter;
 361                 $this->mTitle->mRestrictions = explode( ',', trim( $s->page_restrictions ) );
 362                 $this->mTitle->mRestrictionsLoaded = true;
 363                 $this->mTouched = wfTimestamp( TS_MW, $s->page_touched );
 364
 365                 $this->mContent = Revision::getRevisionText( $s );
 366
 367                 $this->mUser = $s->rev_user;
 368                 $this->mUserText = $s->rev_user_text;
 369                 $this->mComment = $s->rev_comment;
 370                 $this->mTimestamp = wfTimestamp( TS_MW, $s->rev_timestamp );
 371
 372                 $this->mContentLoaded = true;
 373                 return $this->mContent;
 374         }
 375
 376         /**
 377          * Gets the article text without using so many damn globals
 378          * Returns false on error
 379          *
 380          * @param integer $oldid
 381          */
 382         function getContentWithoutUsingSoManyDamnGlobals( $oldid = 0, $noredir = false ) {
 383                 return $this->fetchContent( $oldid, $noredir, false );
 384         }
 385
 386         /**
 387          * Read/write accessor to select FOR UPDATE
 388          */
 389         function forUpdate( $x = NULL ) {
 390                 return wfSetVar( $this->mForUpdate, $x );
 391         }
 392
 393         /**
 394          * Get the database which should be used for reads
 395          */
 396         function &getDB() {
 397                 if ( $this->mForUpdate ) {
 398                         return wfGetDB( DB_MASTER );
 399                 } else {
 400                         return wfGetDB( DB_SLAVE );
 401                 }
 402         }
 403
 404         /**
 405          * Get options for all SELECT statements
 406          * Can pass an option array, to which the class-wide options will be appended
 407          */
 408         function getSelectOptions( $options = '' ) {
 409                 if ( $this->mForUpdate ) {
 410                         if ( $options ) {
 411                                 $options[] = 'FOR UPDATE';
 412                         } else {
 413                                 $options = 'FOR UPDATE';
 414                         }
 415                 }
 416                 return $options;
 417         }
 418
 419         /**
 420          * Return the Article ID
 421          */
 422         function getID() {
 423                 if( $this->mTitle ) {
 424                         return $this->mTitle->getArticleID();
 425                 } else {
 426                         return 0;
 427                 }
 428         }
 429
 430         /**
 431          * Get the view count for this article
 432          */
 433         function getCount() {
 434                 if ( -1 == $this->mCounter ) {
 435                         $id = $this->getID();
 436                         $dbr =& $this->getDB();
 437                         $this->mCounter = $dbr->selectField( 'page', 'page_counter', array( 'page_id' => $id ),
 438                                 'Article::getCount', $this->getSelectOptions() );
 439                 }
 440                 return $this->mCounter;
 441         }
 442
 443         /**
 444          * Would the given text make this article a "good" article (i.e.,
 445          * suitable for including in the article count)?
 446          */
 447         function isCountable( $text ) {
 448                 global $wgUseCommaCount;
 449
 450                 if ( 0 != $this->mTitle->getNamespace() ) { return 0; }
 451                 if ( $this->isRedirect( $text ) ) { return 0; }
 452                 $token = ($wgUseCommaCount ? ',' : '[[' );
 453                 if ( false === strstr( $text, $token ) ) { return 0; }
 454                 return 1;
 455         }
 456
 457         /**
 458          * Tests if the article text represents a redirect
 459          */
 460         function isRedirect( $text = false ) {
 461                 if ( $text === false ) {
 462                         $this->loadContent();
 463                         $titleObj = Title::newFromRedirect( $this->mText );
 464                 } else {
 465                         $titleObj = Title::newFromRedirect( $text );
 466                 }
 467                 return $titleObj !== NULL;
 468         }
 469
 470         /**
 471          * Loads everything except the text
 472          * This isn't necessary for all uses, so it's only done if needed.
 473          * @private
 474          */
 475         function loadLastEdit() {
 476                 global $wgOut;
 477
 478                 if ( -1 != $this->mUser )
 479                         return;
 480
 481                 $fname = 'Article::loadLastEdit';
 482
 483                 $dbr =& $this->getDB();
 484                 $s = $dbr->selectRow( array( 'revision', 'page') ,
 485                   array( 'rev_user','rev_user_text','rev_timestamp', 'rev_comment','rev_minor_edit' ),
 486                   array( 'page_id' => $this->getID(), 'page_latest=rev_id' ), $fname, $this->getSelectOptions() );
 487
 488                 if ( $s !== false ) {
 489                         $this->mUser = $s->rev_user;
 490                         $this->mUserText = $s->rev_user_text;
 491                         $this->mTimestamp = wfTimestamp(TS_MW,$s->rev_timestamp);
 492                         $this->mComment = $s->rev_comment;
 493                         $this->mMinorEdit = $s->rev_minor_edit;
 494                 }
 495         }
 496
 497         function getTimestamp() {
 498                 $this->loadLastEdit();
 499                 return $this->mTimestamp;
 500         }
 501
 502         function getUser() {
 503                 $this->loadLastEdit();
 504                 return $this->mUser;
 505         }
 506
 507         function getUserText() {
 508                 $this->loadLastEdit();
 509                 return $this->mUserText;
 510         }
 511
 512         function getComment() {
 513                 $this->loadLastEdit();
 514                 return $this->mComment;
 515         }
 516
 517         function getMinorEdit() {
 518                 $this->loadLastEdit();
 519                 return $this->mMinorEdit;
 520         }
 521
 522         function getContributors($limit = 0, $offset = 0) {
 523                 $fname = 'Article::getContributors';
 524
 525                 # XXX: this is expensive; cache this info somewhere.
 526
 527                 $title = $this->mTitle;
 528                 $contribs = array();
 529                 $dbr =& $this->getDB();
 530                 $revTable = $dbr->tableName( 'revision' );
 531                 $userTable = $dbr->tableName( 'user' );
 532                 $encDBkey = $dbr->addQuotes( $title->getDBkey() );
 533                 $ns = $title->getNamespace();
 534                 $user = $this->getUser();
 535
 536                 $sql = "SELECT rev_user, rev_user_text, user_real_name, MAX(rev_timestamp) as timestamp
 537                         FROM $revTable LEFT JOIN $userTable ON rev_user = user_id
 538                         WHERE rev_page = $pageId
 539                         AND old_user != $user
 540                         GROUP BY rev_user, rev_user_text, user_real_name
 541                         ORDER BY timestamp DESC";
 542
 543                 if ($limit > 0) { $sql .= ' LIMIT '.$limit; }
 544                 $sql .= ' '. $this->getSelectOptions();
 545
 546                 $res = $dbr->query($sql, $fname);
 547
 548                 while ( $line = $dbr->fetchObject( $res ) ) {
 549                         $contribs[] = array($line->rev_user, $line->rev_user_text, $line->user_real_name);
 550                 }
 551
 552                 $dbr->freeResult($res);
 553                 return $contribs;
 554         }
 555
 556         /**
 557          * This is the default action of the script: just view the page of
 558          * the given title.
 559         */
 560         function view() {
 561                 global $wgUser, $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgLang;
 562                 global $wgLinkCache, $IP, $wgEnableParserCache, $wgStylePath, $wgUseRCPatrol;
 563                 global $wgEnotif;
 564                 $sk = $wgUser->getSkin();
 565
 566                 $fname = 'Article::view';
 567                 wfProfileIn( $fname );
 568                 # Get variables from query string
 569                 $oldid = $this->getOldID();
 570                 $diff = $wgRequest->getVal( 'diff' );
 571                 $rcid = $wgRequest->getVal( 'rcid' );
 572
 573                 $wgOut->setArticleFlag( true );
 574                 $wgOut->setRobotpolicy( 'index,follow' );
 575                 # If we got diff and oldid in the query, we want to see a
 576                 # diff page instead of the article.
 577
 578                 if ( !is_null( $diff ) ) {
 579                         require_once( 'DifferenceEngine.php' );
 580                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 581                         $de = new DifferenceEngine( $oldid, $diff, $rcid );
 582                         $de->showDiffPage();
 583                         if( $diff == 0 ) {
 584                                 # Run view updates for current revision only
 585                                 $this->viewUpdates();
 586                         }
 587                         wfProfileOut( $fname );
 588                         return;
 589                 }
 590                 if ( empty( $oldid ) && $this->checkTouched() ) {
 591                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 592                                 wfProfileOut( $fname );
 593                                 return;
 594                         } else if ( $this->tryFileCache() ) {
 595                                 # tell wgOut that output is taken care of
 596                                 $wgOut->disable();
 597                                 $this->viewUpdates();
 598                                 wfProfileOut( $fname );
 599                                 return;
 600                         }
 601                 }
 602                 # Should the parser cache be used?
 603                 if ( $wgEnableParserCache && intval($wgUser->getOption( 'stubthreshold' )) == 0 && empty( $oldid ) ) {
 604                         $pcache = true;
 605                 } else {
 606                         $pcache = false;
 607                 }
 608
 609                 $outputDone = false;
 610                 if ( $pcache ) {
 611                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 612                                 $outputDone = true;
 613                         }
 614                 }
 615                 if ( !$outputDone ) {
 616                         $text = $this->getContent( false ); # May change mTitle by following a redirect
 617
 618                         # Another whitelist check in case oldid or redirects are altering the title
 619                         if ( !$this->mTitle->userCanRead() ) {
 620                                 $wgOut->loginToUse();
 621                                 $wgOut->output();
 622                                 exit;
 623                         }
 624
 625
 626                         # We're looking at an old revision
 627
 628                         if ( !empty( $oldid ) ) {
 629                                 $this->setOldSubtitle( isset($this->mOldId) ? $this->mOldId : $oldid );
 630                                 $wgOut->setRobotpolicy( 'noindex,follow' );
 631                         }
 632                         if ( '' != $this->mRedirectedFrom ) {
 633                                 $sk = $wgUser->getSkin();
 634                                 $redir = $sk->makeKnownLink( $this->mRedirectedFrom, '',
 635                                   'redirect=no' );
 636                                 $s = wfMsg( 'redirectedfrom', $redir );
 637                                 $wgOut->setSubtitle( $s );
 638
 639                                 # Can't cache redirects
 640                                 $pcache = false;
 641                         }
 642
 643                         # wrap user css and user js in pre and don't parse
 644                         # XXX: use $this->mTitle->usCssJsSubpage() when php is fixed/ a workaround is found
 645                         if (
 646                                 $this->mTitle->getNamespace() == NS_USER &&
 647                                 preg_match('/\\/[\\w]+\\.(css|js)$/', $this->mTitle->getDBkey())
 648                         ) {
 649                                 $wgOut->addWikiText( wfMsg('clearyourcache'));
 650                                 $wgOut->addHTML( '<pre>'.htmlspecialchars($this->mContent)."\n</pre>" );
 651                         } else if ( $rt = Title::newFromRedirect( $text ) ) {
 652                                 # Display redirect
 653                                 $imageUrl = $wgStylePath.'/common/images/redirect.png';
 654                                 $targetUrl = $rt->escapeLocalURL();
 655                                 $titleText = htmlspecialchars( $rt->getPrefixedText() );
 656                                 $link = $sk->makeLinkObj( $rt );
 657
 658                                 $wgOut->addHTML( '<img valign="center" src="'.$imageUrl.'" alt="#REDIRECT" />' .
 659                                   '<span class="redirectText">'.$link.'</span>' );
 660
 661                         } else if ( $pcache ) {
 662                                 # Display content and save to parser cache
 663                                 $wgOut->addPrimaryWikiText( $text, $this );
 664                         } else {
 665                                 # Display content, don't attempt to save to parser cache
 666                                 $wgOut->addWikiText( $text );
 667                         }
 668                 }
 669                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 670                 # If we have been passed an &rcid= parameter, we want to give the user a
 671                 # chance to mark this new article as patrolled.
 672                 if ( $wgUseRCPatrol && !is_null ( $rcid ) && $rcid != 0 && $wgUser->getID() != 0 &&
 673                      ( $wgUser->isAllowed('patrol') || !$wgOnlySysopsCanPatrol ) )
 674                 {
 675                         $wgOut->addHTML( wfMsg ( 'markaspatrolledlink',
 676                                 $sk->makeKnownLinkObj ( $this->mTitle, wfMsg ( 'markaspatrolledtext' ),
 677                                         'action=markpatrolled&rcid='.$rcid )
 678                          ) );
 679                 }
 680
 681                 # Put link titles into the link cache
 682                 $wgOut->transformBuffer();
 683
 684                 # Add link titles as META keywords
 685                 $wgOut->addMetaTags() ;
 686
 687                 $this->viewUpdates();
 688                 wfProfileOut( $fname );
 689
 690                 $wgUser->clearNotification( $this->mTitle );
 691         }
 692
 693         /**
 694          * Theoretically we could defer these whole insert and update
 695          * functions for after display, but that's taking a big leap
 696          * of faith, and we want to be able to report database
 697          * errors at some point.
 698          * @private
 699          */
 700         function insertNewArticle( $text, $summary, $isminor, $watchthis ) {
 701                 global $wgOut, $wgUser;
 702                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 703
 704                 $fname = 'Article::insertNewArticle';
 705
 706                 $this->mCountAdjustment = $this->isCountable( $text );
 707
 708                 $ns = $this->mTitle->getNamespace();
 709                 $ttl = $this->mTitle->getDBkey();
 710                 $text = $this->preSaveTransform( $text );
 711                 if ( $this->isRedirect( $text ) ) { $redir = 1; }
 712                 else { $redir = 0; }
 713
 714                 $now = wfTimestampNow();
 715                 $won = wfInvertTimestamp( $now );
 716                 wfSeedRandom();
 717                 $rand = wfRandom();
 718                 $isminor = ( $isminor && $wgUser->getID() ) ? 1 : 0;
 719
 720                 $mungedText = $text;
 721                 $flags = Revision::compressRevisionText( $mungedText );
 722
 723                 $dbw =& wfGetDB( DB_MASTER );
 724
 725                 $old_id = $dbw->nextSequenceValue( 'text_old_id_seq' );
 726                 $dbw->insert( 'text', array(
 727                         'old_id' => $old_id,
 728                         'old_text' => $mungedText,
 729                         'old_flags' => $flags,
 730                 ), $fname );
 731                 $revisionId = $dbw->insertId();
 732
 733                 $page_id = $dbw->nextSequenceValue( 'page_page_id_seq' );
 734                 $dbw->insert( 'page', array(
 735                         'page_id' => $page_id,
 736                         'page_namespace' => $ns,
 737                         'page_title' => $ttl,
 738                         'page_counter' => 0,
 739                         'page_restrictions' => '',
 740                         'page_is_redirect' => $redir,
 741                         'page_is_new' => 1,
 742                         'page_random' => $rand,
 743                         'page_touched' => $dbw->timestamp($now),
 744                         'page_latest' => $revisionId,
 745                 ), $fname );
 746                 $newid = $dbw->insertId();
 747
 748                 $dbw->insert( 'revision', array(
 749                         'rev_page' => $newid,
 750                         'rev_id' => $revisionId,
 751                         'rev_comment' => $summary,
 752                         'rev_user' => $wgUser->getID(),
 753                         'rev_timestamp' => $dbw->timestamp($now),
 754                         'rev_minor_edit' => $isminor,
 755                         'rev_user_text' => $wgUser->getName(),
 756                         'inverse_timestamp' => $won,
 757                 ), $fname );
 758
 759                 $this->mTitle->resetArticleID( $newid );
 760
 761                 Article::onArticleCreate( $this->mTitle );
 762                 RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary );
 763
 764                 if ($watchthis) {
 765                         if(!$this->mTitle->userIsWatching()) $this->watch();
 766                 } else {
 767                         if ( $this->mTitle->userIsWatching() ) {
 768                                 $this->unwatch();
 769                         }
 770                 }
 771
 772                 # The talk page isn't in the regular link tables, so we need to update manually:
 773                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 774                 $dbw->update( 'page',
 775                         array( 'page_touched' => $dbw->timestamp($now) ),
 776                         array( 'page_namespace' => $talkns,
 777                                'page_title' => $ttl ),
 778                         $fname );
 779
 780                 # standard deferred updates
 781                 $this->editUpdates( $text, $summary, $isminor, $now );
 782
 783                 $oldid = 0; # new article
 784                 $this->showArticle( $text, wfMsg( 'newarticle' ), false, $isminor, $now, $summary, $oldid );
 785         }
 786
 787         /**
 788          * Fetch and uncompress the text for a given revision.
 789          * Can ask by rev_id number or timestamp (set $field)
 790          */
 791         function fetchRevisionText( $revId = null, $field = 'rev_id' ) {
 792                 $fname = 'Article::fetchRevisionText';
 793                 $dbw =& wfGetDB( DB_MASTER );
 794                 if( $revId ) {
 795                         $rev = $dbw->addQuotes( $revId );
 796                 } else {
 797                         $rev = 'page_latest';
 798                 }
 799                 $result = $dbw->query(
 800                         sprintf( "SELECT old_text, old_flags
 801                                 FROM %s,%s,%s
 802                                 WHERE old_id=rev_id AND rev_page=page_id AND page_id=%d
 803                                 AND %s=%s",
 804                                 $dbw->tableName( 'page' ),
 805                                 $dbw->tableName( 'revision' ),
 806                                 $dbw->tableName( 'text' ),
 807                                 IntVal( $this->mTitle->getArticleId() ),
 808                                 $field,
 809                                 $rev ),
 810                         $fname );
 811                 $obj = $dbw->fetchObject( $result );
 812                 $dbw->freeResult( $result );
 813                 $oldtext = Revision::getRevisionText( $obj );
 814                 return $oldtext;
 815         }
 816
 817         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = '', $edittime = NULL) {
 818                 $fname = 'Article::getTextOfLastEditWithSectionReplacedOrAdded';
 819                 if( is_null( $edittime ) ) {
 820                         $oldtext = $this->fetchRevisionText();
 821                 } else {
 822                         $oldtext = $this->fetchRevisionText( $edittime, 'rev_timestamp' );
 823                 }
 824                 if ($section != '') {
 825                         if($section=='new') {
 826                                 if($summary) $subject="== {$summary} ==\n\n";
 827                                 $text=$oldtext."\n\n".$subject.$text;
 828                         } else {
 829
 830                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 831                                 # comments to be stripped as well)
 832                                 $striparray=array();
 833                                 $parser=new Parser();
 834                                 $parser->mOutputType=OT_WIKI;
 835                                 $oldtext=$parser->strip($oldtext, $striparray, true);
 836
 837                                 # now that we can be sure that no pseudo-sections are in the source,
 838                                 # split it up
 839                                 # Unfortunately we can't simply do a preg_replace because that might
 840                                 # replace the wrong section, so we have to use the section counter instead
 841                                 $secs=preg_split('/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 842                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 843                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 844
 845                                 # section 0 is top (intro) section
 846                                 if($section!=0) {
 847
 848                                         # headline of old section - we need to go through this section
 849                                         # to determine if there are any subsections that now need to
 850                                         # be erased, as the mother section has been replaced with
 851                                         # the text of all subsections.
 852                                         $headline=$secs[$section*2-1];
 853                                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 854                                         $hlevel=$matches[1];
 855
 856                                         # determine headline level for wikimarkup headings
 857                                         if(strpos($hlevel,'=')!==false) {
 858                                                 $hlevel=strlen($hlevel);
 859                                         }
 860
 861                                         $secs[$section*2-1]=''; // erase old headline
 862                                         $count=$section+1;
 863                                         $break=false;
 864                                         while(!empty($secs[$count*2-1]) && !$break) {
 865
 866                                                 $subheadline=$secs[$count*2-1];
 867                                                 preg_match(
 868                                                  '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 869                                                 $subhlevel=$matches[1];
 870                                                 if(strpos($subhlevel,'=')!==false) {
 871                                                         $subhlevel=strlen($subhlevel);
 872                                                 }
 873                                                 if($subhlevel > $hlevel) {
 874                                                         // erase old subsections
 875                                                         $secs[$count*2-1]='';
 876                                                         $secs[$count*2]='';
 877                                                 }
 878                                                 if($subhlevel <= $hlevel) {
 879                                                         $break=true;
 880                                                 }
 881                                                 $count++;
 882
 883                                         }
 884
 885                                 }
 886                                 $text=join('',$secs);
 887                                 # reinsert the stuff that we stripped out earlier
 888                                 $text=$parser->unstrip($text,$striparray);
 889                                 $text=$parser->unstripNoWiki($text,$striparray);
 890                         }
 891
 892                 }
 893                 return $text;
 894         }
 895
 896         /**
 897          * Change an existing article. Puts the previous version back into the old table, updates RC
 898          * and all necessary caches, mostly via the deferred update array.
 899          *
 900          * It is possible to call this function from a command-line script, but note that you should
 901          * first set $wgUser, and clean up $wgDeferredUpdates after each edit.
 902          */
 903         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
 904                 global $wgOut, $wgUser;
 905                 global $wgDBtransactions, $wgMwRedir;
 906                 global $wgUseSquid, $wgInternalServer;
 907
 908                 $fname = 'Article::updateArticle';
 909                 $good = true;
 910
 911                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
 912                 if ( $minor && $wgUser->getID() ) { $me2 = 1; } else { $me2 = 0; }
 913                 if ( $this->isRedirect( $text ) ) {
 914                         # Remove all content but redirect
 915                         # This could be done by reconstructing the redirect from a title given by
 916                         # Title::newFromRedirect(), but then we wouldn't know which synonym the user
 917                         # wants to see
 918                         if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ')[^\\n]+)/i', $text, $m ) ) {
 919                                 $redir = 1;
 920                                 $text = $m[1] . "\n";
 921                         }
 922                 }
 923                 else { $redir = 0; }
 924
 925                 $text = $this->preSaveTransform( $text );
 926                 $dbw =& wfGetDB( DB_MASTER );
 927
 928                 # Update article, but only if changed.
 929
 930                 # It's important that we either rollback or complete, otherwise an attacker could
 931                 # overwrite cur entries by sending precisely timed user aborts. Random bored users
 932                 # could conceivably have the same effect, especially if cur is locked for long periods.
 933                 if( $wgDBtransactions ) {
 934                         $dbw->query( 'BEGIN', $fname );
 935                 } else {
 936                         $userAbort = ignore_user_abort( true );
 937                 }
 938
 939                 $oldtext = $this->getContent( true );
 940
 941                 if ( 0 != strcmp( $text, $oldtext ) ) {
 942                         $this->mCountAdjustment = $this->isCountable( $text )
 943                           - $this->isCountable( $oldtext );
 944                         $now = wfTimestampNow();
 945                         $won = wfInvertTimestamp( $now );
 946
 947                         $mungedText = $text;
 948                         $flags = Revision::compressRevisionText( $newtext );
 949
 950                         $lastRevision = $dbw->selectField(
 951                                 'page', 'page_latest', array( 'page_id' => $this->getId() ) );
 952
 953                         # Record the text to the text table
 954                         $old_id = $dbw->nextSequenceValue( 'text_old_id_val' );
 955                         $dbw->insert( 'text',
 956                                 array(
 957                                         'old_id' => $old_id,
 958                                         'old_text' => $mungedText,
 959                                         'old_flags' => $flags,
 960                                 ), $fname
 961                         );
 962                         $revisionId = $dbw->insertId();
 963
 964                         # Record the edit in revisions
 965                         $dbw->insert( 'revision',
 966                                 array(
 967                                         'rev_id' => $revisionId,
 968                                         'rev_page' => $this->getID(),
 969                                         'rev_comment' => $summary,
 970                                         'rev_minor_edit' => $me2,
 971                                         'rev_user' => $wgUser->getID(),
 972                                         'rev_user_text' => $wgUser->getName(),
 973                                         'rev_timestamp' => $dbw->timestamp( $now ),
 974                                         'inverse_timestamp' => $won
 975                                 ), $fname
 976                         );
 977
 978                         # Update page
 979                         $dbw->update( 'page',
 980                                 array( /* SET */
 981                                         'page_latest' => $revisionId,
 982                                         'page_touched' => $dbw->timestamp( $now ),
 983                                         'page_is_new' => 0,
 984                                         'page_is_redirect' => $redir,
 985                                 ), array( /* WHERE */
 986                                         'page_id' => $this->getID(),
 987                                         'page_latest' => $lastRevision, # Paranoia
 988                                 ), $fname
 989                         );
 990
 991                         if( $dbw->affectedRows() == 0 ) {
 992                                 /* Belated edit conflict! Run away!! */
 993                                 $good = false;
 994                         } else {
 995                                 # Update recentchanges and purge cache and whatnot
 996                                 $bot = (int)($wgUser->isBot() || $forceBot);
 997                                 RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
 998                                         $lastRevision, $this->getTimestamp(), $bot );
 999                                 Article::onArticleEdit( $this->mTitle );
1000                         }
1001                 }
1002
1003                 if( $wgDBtransactions ) {
1004                         $dbw->query( 'COMMIT', $fname );
1005                 } else {
1006                         ignore_user_abort( $userAbort );
1007                 }
1008
1009                 if ( $good ) {
1010                 if ($watchthis) {
1011                         if (!$this->mTitle->userIsWatching()) $this->watch();
1012                 } else {
1013                         if ( $this->mTitle->userIsWatching() ) {
1014                                 $this->unwatch();
1015                         }
1016                 }
1017                 # standard deferred updates
1018                 $this->editUpdates( $text, $summary, $minor, $now );
1019
1020
1021                 $urls = array();
1022                 # Template namespace
1023                 # Purge all articles linking here
1024                 if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
1025                         $titles = $this->mTitle->getLinksTo();
1026                         Title::touchArray( $titles );
1027                         if ( $wgUseSquid ) {
1028                                         foreach ( $titles as $title ) {
1029                                                 $urls[] = $title->getInternalURL();
1030                                         }
1031                         }
1032                 }
1033
1034                 # Squid updates
1035                 if ( $wgUseSquid ) {
1036                         $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
1037                         $u = new SquidUpdate( $urls );
1038                         $u->doUpdate();
1039                 }
1040
1041                 $this->showArticle( $text, wfMsg( 'updated' ), $sectionanchor, $me2, $now, $summary, $revisionId );
1042                 }
1043                 return $good;
1044         }
1045
1046         /**
1047          * After we've either updated or inserted the article, update
1048          * the link tables and redirect to the new page.
1049          */
1050         function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid ) {
1051                 global $wgOut, $wgUser, $wgLinkCache, $wgEnotif;
1052
1053                 $wgLinkCache = new LinkCache();
1054                 # Select for update
1055                 $wgLinkCache->forUpdate( true );
1056
1057                 # Get old version of link table to allow incremental link updates
1058                 $wgLinkCache->preFill( $this->mTitle );
1059                 $wgLinkCache->clear();
1060
1061                 # Parse the text and replace links with placeholders
1062                 $wgOut = new OutputPage();
1063                 $wgOut->addWikiText( $text );
1064
1065                 # Look up the links in the DB and add them to the link cache
1066                 $wgOut->transformBuffer( RLH_FOR_UPDATE );
1067
1068                 if( $this->isRedirect( $text ) )
1069                         $r = 'redirect=no';
1070                 else
1071                         $r = '';
1072                 $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
1073
1074                 # this call would better fit into RecentChange::notifyEdit and RecentChange::notifyNew .
1075                 # this will be improved later (to-do)
1076
1077                 include_once( "UserMailer.php" );
1078                 $wgEnotif = new EmailNotification ();
1079                 $wgEnotif->NotifyOnPageChange( $wgUser->getID(), $this->mTitle->getDBkey(), $this->mTitle->getNamespace(),$now, $summary, $me2, $oldid );
1080         }
1081
1082         /**
1083          * Validate article
1084          * @todo document this function a bit more
1085          */
1086         function validate () {
1087                 global $wgOut, $wgUseValidation;
1088                 if( $wgUseValidation ) {
1089                         require_once ( 'SpecialValidate.php' ) ;
1090                         $wgOut->setPagetitle( wfMsg( 'validate' ) . ': ' . $this->mTitle->getPrefixedText() );
1091                         $wgOut->setRobotpolicy( 'noindex,follow' );
1092                         if( $this->mTitle->getNamespace() != 0 ) {
1093                                 $wgOut->addHTML( wfMsg( 'val_validate_article_namespace_only' ) );
1094                                 return;
1095                         }
1096                         $v = new Validation;
1097                         $v->validate_form( $this->mTitle->getDBkey() );
1098                 } else {
1099                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
1100                 }
1101         }
1102
1103         /**
1104          * Mark this particular edit as patrolled
1105          */
1106         function markpatrolled() {
1107                 global $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgUseRCPatrol, $wgUser;
1108                 $wgOut->setRobotpolicy( 'noindex,follow' );
1109
1110                 if ( !$wgUseRCPatrol )
1111                 {
1112                         $wgOut->errorpage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1113                         return;
1114                 }
1115                 if ( $wgUser->getID() == 0 )
1116                 {
1117                         $wgOut->loginToUse();
1118                         return;
1119                 }
1120                 if ( $wgOnlySysopsCanPatrol && !$wgUser->isAllowed('patrol') )
1121                 {
1122                         $wgOut->sysopRequired();
1123                         return;
1124                 }
1125                 $rcid = $wgRequest->getVal( 'rcid' );
1126                 if ( !is_null ( $rcid ) )
1127                 {
1128                         RecentChange::markPatrolled( $rcid );
1129                         $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
1130                         $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
1131
1132                         $rcTitle = Title::makeTitle( NS_SPECIAL, 'Recentchanges' );
1133                         $wgOut->returnToMain( false, $rcTitle->getPrefixedText() );
1134                 }
1135                 else
1136                 {
1137                         $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1138                 }
1139         }
1140
1141
1142         /**
1143          * Add this page to $wgUser's watchlist
1144          */
1145
1146         function watch() {
1147
1148                 global $wgUser, $wgOut;
1149
1150                 if ( 0 == $wgUser->getID() ) {
1151                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1152                         return;
1153                 }
1154                 if ( wfReadOnly() ) {
1155                         $wgOut->readOnlyPage();
1156                         return;
1157                 }
1158
1159                 if (wfRunHooks('WatchArticle', $wgUser, $this)) {
1160
1161                         $wgUser->addWatch( $this->mTitle );
1162                         $wgUser->saveSettings();
1163
1164                         wfRunHooks('WatchArticleComplete', $wgUser, $this);
1165
1166                         $wgOut->setPagetitle( wfMsg( 'addedwatch' ) );
1167                         $wgOut->setRobotpolicy( 'noindex,follow' );
1168
1169                         $link = $this->mTitle->getPrefixedText();
1170                         $text = wfMsg( 'addedwatchtext', $link );
1171                         $wgOut->addWikiText( $text );
1172                 }
1173
1174                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1175         }
1176
1177         /**
1178          * Stop watching a page
1179          */
1180
1181         function unwatch() {
1182
1183                 global $wgUser, $wgOut;
1184
1185                 if ( 0 == $wgUser->getID() ) {
1186                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1187                         return;
1188                 }
1189                 if ( wfReadOnly() ) {
1190                         $wgOut->readOnlyPage();
1191                         return;
1192                 }
1193
1194                 if (wfRunHooks('UnwatchArticle', $wgUser, $this)) {
1195
1196                         $wgUser->removeWatch( $this->mTitle );
1197                         $wgUser->saveSettings();
1198
1199                         wfRunHooks('UnwatchArticleComplete', $wgUser, $this);
1200
1201                         $wgOut->setPagetitle( wfMsg( 'removedwatch' ) );
1202                         $wgOut->setRobotpolicy( 'noindex,follow' );
1203
1204                         $link = $this->mTitle->getPrefixedText();
1205                         $text = wfMsg( 'removedwatchtext', $link );
1206                         $wgOut->addWikiText( $text );
1207                 }
1208
1209                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1210         }
1211
1212         /**
1213          * protect a page
1214          */
1215         function protect( $limit = 'sysop' ) {
1216                 global $wgUser, $wgOut, $wgRequest;
1217
1218                 if ( ! $wgUser->isAllowed('protect') ) {
1219                         $wgOut->sysopRequired();
1220                         return;
1221                 }
1222                 if ( wfReadOnly() ) {
1223                         $wgOut->readOnlyPage();
1224                         return;
1225                 }
1226                 $id = $this->mTitle->getArticleID();
1227                 if ( 0 == $id ) {
1228                         $wgOut->fatalError( wfMsg( 'badarticleerror' ) );
1229                         return;
1230                 }
1231
1232                 $confirm = $wgRequest->getBool( 'wpConfirmProtect' ) && $wgRequest->wasPosted();
1233                 $moveonly = $wgRequest->getBool( 'wpMoveOnly' );
1234                 $reason = $wgRequest->getText( 'wpReasonProtect' );
1235
1236                 if ( $confirm ) {
1237                         $dbw =& wfGetDB( DB_MASTER );
1238                         $dbw->update( 'page',
1239                                 array( /* SET */
1240                                         'page_touched' => $dbw->timestamp(),
1241                                         'page_restrictions' => (string)$limit
1242                                 ), array( /* WHERE */
1243                                         'page_id' => $id
1244                                 ), 'Article::protect'
1245                         );
1246
1247                         $restrictions = "move=" . $limit;
1248                         if( !$moveonly ) {
1249                                 $restrictions .= ":edit=" . $limit;
1250                         }
1251                         if (wfRunHooks('ArticleProtect', $this, $wgUser, $limit == 'sysop', $reason, $moveonly)) {
1252
1253                                 $dbw =& wfGetDB( DB_MASTER );
1254                                 $dbw->update( 'page',
1255                                                           array( /* SET */
1256                                                                          'page_touched' => $dbw->timestamp(),
1257                                                                          'page_restrictions' => $restrictions
1258                                                                          ), array( /* WHERE */
1259                                                                                            'page_id' => $id
1260                                                                                            ), 'Article::protect'
1261                                                           );
1262
1263                                 wfRunHooks('ArticleProtectComplete', $this, $wgUser, $limit == 'sysop', $reason, $moveonly);
1264
1265                                 $log = new LogPage( 'protect' );
1266                                 if ( $limit === '' ) {
1267                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1268                                 } else {
1269                                         $log->addEntry( 'protect', $this->mTitle, $reason );
1270                                 }
1271                                 $wgOut->redirect( $this->mTitle->getFullURL() );
1272                         }
1273                         return;
1274                 } else {
1275                         $reason = htmlspecialchars( wfMsg( 'protectreason' ) );
1276                         return $this->confirmProtect( '', $reason, $limit );
1277                 }
1278         }
1279
1280         /**
1281          * Output protection confirmation dialog
1282          */
1283         function confirmProtect( $par, $reason, $limit = 'sysop'  ) {
1284                 global $wgOut;
1285
1286                 wfDebug( "Article::confirmProtect\n" );
1287
1288                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1289                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1290
1291                 $check = '';
1292                 $protcom = '';
1293                 $moveonly = '';
1294
1295                 if ( $limit === '' ) {
1296                         $wgOut->setPageTitle( wfMsg( 'confirmunprotect' ) );
1297                         $wgOut->setSubtitle( wfMsg( 'unprotectsub', $sub ) );
1298                         $wgOut->addWikiText( wfMsg( 'confirmunprotecttext' ) );
1299                         $check = htmlspecialchars( wfMsg( 'confirmunprotect' ) );
1300                         $protcom = htmlspecialchars( wfMsg( 'unprotectcomment' ) );
1301                         $formaction = $this->mTitle->escapeLocalURL( 'action=unprotect' . $par );
1302                 } else {
1303                         $wgOut->setPageTitle( wfMsg( 'confirmprotect' ) );
1304                         $wgOut->setSubtitle( wfMsg( 'protectsub', $sub ) );
1305                         $wgOut->addWikiText( wfMsg( 'confirmprotecttext' ) );
1306                         $check = htmlspecialchars( wfMsg( 'confirmprotect' ) );
1307                         $moveonly = htmlspecialchars( wfMsg( 'protectmoveonly' ) );
1308                         $protcom = htmlspecialchars( wfMsg( 'protectcomment' ) );
1309                         $formaction = $this->mTitle->escapeLocalURL( 'action=protect' . $par );
1310                 }
1311
1312                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1313
1314                 $wgOut->addHTML( "
1315 <form id='protectconfirm' method='post' action=\"{$formaction}\">
1316         <table border='0'>
1317                 <tr>
1318                         <td align='right'>
1319                                 <label for='wpReasonProtect'>{$protcom}:</label>
1320                         </td>
1321                         <td align='left'>
1322                                 <input type='text' size='60' name='wpReasonProtect' id='wpReasonProtect' value=\"" . htmlspecialchars( $reason ) . "\" />
1323                         </td>
1324                 </tr>
1325                 <tr>
1326                         <td>&nbsp;</td>
1327                 </tr>
1328                 <tr>
1329                         <td align='right'>
1330                                 <input type='checkbox' name='wpConfirmProtect' value='1' id='wpConfirmProtect' />
1331                         </td>
1332                         <td>
1333                                 <label for='wpConfirmProtect'>{$check}</label>
1334                         </td>
1335                 </tr> " );
1336                 if($moveonly != '') {
1337                         $wgOut->AddHTML( "
1338                 <tr>
1339                         <td align='right'>
1340                                 <input type='checkbox' name='wpMoveOnly' value='1' id='wpMoveOnly' />
1341                         </td>
1342                         <td>
1343                                 <label for='wpMoveOnly'>{$moveonly}</label>
1344                         </td>
1345                 </tr> " );
1346                 }
1347                 $wgOut->addHTML( "
1348                 <tr>
1349                         <td>&nbsp;</td>
1350                         <td>
1351                                 <input type='submit' name='wpConfirmProtectB' value=\"{$confirm}\" />
1352                         </td>
1353                 </tr>
1354         </table>
1355 </form>\n" );
1356
1357                 $wgOut->returnToMain( false );
1358         }
1359
1360         /**
1361          * Unprotect the pages
1362          */
1363         function unprotect() {
1364                 return $this->protect( '' );
1365         }
1366
1367         /*
1368          * UI entry point for page deletion
1369          */
1370         function delete() {
1371                 global $wgUser, $wgOut, $wgMessageCache, $wgRequest;
1372                 $fname = 'Article::delete';
1373                 $confirm = $wgRequest->getBool( 'wpConfirm' ) && $wgRequest->wasPosted();
1374                 $reason = $wgRequest->getText( 'wpReason' );
1375
1376                 # This code desperately needs to be totally rewritten
1377
1378                 # Check permissions
1379                 if ( ( ! $wgUser->isAllowed('delete') ) ) {
1380                         $wgOut->sysopRequired();
1381                         return;
1382                 }
1383                 if ( wfReadOnly() ) {
1384                         $wgOut->readOnlyPage();
1385                         return;
1386                 }
1387
1388                 # Better double-check that it hasn't been deleted yet!
1389                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1390                 if ( ( '' == trim( $this->mTitle->getText() ) )
1391                   or ( $this->mTitle->getArticleId() == 0 ) ) {
1392                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1393                         return;
1394                 }
1395
1396                 if ( $confirm ) {
1397                         $this->doDelete( $reason );
1398                         return;
1399                 }
1400
1401                 # determine whether this page has earlier revisions
1402                 # and insert a warning if it does
1403                 # we select the text because it might be useful below
1404                 $dbr =& $this->getDB();
1405                 $ns = $this->mTitle->getNamespace();
1406                 $title = $this->mTitle->getDBkey();
1407                 $old = $dbr->selectRow( 'old',
1408                         array( 'old_text', 'old_flags' ),
1409                         array(
1410                                 'old_namespace' => $ns,
1411                                 'old_title' => $title,
1412                         ), $fname, $this->getSelectOptions( array( 'ORDER BY' => 'inverse_timestamp' ) )
1413                 );
1414
1415                 if( $old !== false && !$confirm ) {
1416                         $skin=$wgUser->getSkin();
1417                         $wgOut->addHTML('<b>'.wfMsg('historywarning'));
1418                         $wgOut->addHTML( $skin->historyLink() .'</b>');
1419                 }
1420
1421                 # Fetch cur_text
1422                 $s = $dbr->selectRow( 'cur',
1423                         array( 'cur_text' ),
1424                         array(
1425                                 'cur_namespace' => $ns,
1426                                 'cur_title' => $title,
1427                         ), $fname, $this->getSelectOptions()
1428                 );
1429
1430                 if( $s !== false ) {
1431                         # if this is a mini-text, we can paste part of it into the deletion reason
1432
1433                         #if this is empty, an earlier revision may contain "useful" text
1434                         $blanked = false;
1435                         if($s->cur_text != '') {
1436                                 $text=$s->cur_text;
1437                         } else {
1438                                 if($old) {
1439                                         $text = Revision::getRevisionText( $old );
1440                                         $blanked = true;
1441                                 }
1442
1443                         }
1444
1445                         $length=strlen($text);
1446
1447                         # this should not happen, since it is not possible to store an empty, new
1448                         # page. Let's insert a standard text in case it does, though
1449                         if($length == 0 && $reason === '') {
1450                                 $reason = wfMsg('exblank');
1451                         }
1452
1453                         if($length < 500 && $reason === '') {
1454
1455                                 # comment field=255, let's grep the first 150 to have some user
1456                                 # space left
1457                                 $text=substr($text,0,150);
1458                                 # let's strip out newlines and HTML tags
1459                                 $text=preg_replace('/\"/',"'",$text);
1460                                 $text=preg_replace('/\</','&lt;',$text);
1461                                 $text=preg_replace('/\>/','&gt;',$text);
1462                                 $text=preg_replace("/[\n\r]/",'',$text);
1463                                 if(!$blanked) {
1464                                         $reason=wfMsg('excontent'). " '".$text;
1465                                 } else {
1466                                         $reason=wfMsg('exbeforeblank') . " '".$text;
1467                                 }
1468                                 if($length>150) { $reason .= '...'; } # we've only pasted part of the text
1469                                 $reason.="'";
1470                         }
1471                 }
1472
1473                 return $this->confirmDelete( '', $reason );
1474         }
1475
1476         /**
1477          * Output deletion confirmation dialog
1478          */
1479         function confirmDelete( $par, $reason ) {
1480                 global $wgOut;
1481
1482                 wfDebug( "Article::confirmDelete\n" );
1483
1484                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1485                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1486                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1487                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1488
1489                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1490
1491                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1492                 $check = htmlspecialchars( wfMsg( 'confirmcheck' ) );
1493                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1494
1495                 $wgOut->addHTML( "
1496 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1497         <table border='0'>
1498                 <tr>
1499                         <td align='right'>
1500                                 <label for='wpReason'>{$delcom}:</label>
1501                         </td>
1502                         <td align='left'>
1503                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1504                         </td>
1505                 </tr>
1506                 <tr>
1507                         <td>&nbsp;</td>
1508                 </tr>
1509                 <tr>
1510                         <td align='right'>
1511                                 <input type='checkbox' name='wpConfirm' value='1' id='wpConfirm' />
1512                         </td>
1513                         <td>
1514                                 <label for='wpConfirm'>{$check}</label>
1515                         </td>
1516                 </tr>
1517                 <tr>
1518                         <td>&nbsp;</td>
1519                         <td>
1520                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1521                         </td>
1522                 </tr>
1523         </table>
1524 </form>\n" );
1525
1526                 $wgOut->returnToMain( false );
1527         }
1528
1529
1530         /**
1531          * Perform a deletion and output success or failure messages
1532          */
1533         function doDelete( $reason ) {
1534                 global $wgOut, $wgUser, $wgContLang;
1535                 $fname = 'Article::doDelete';
1536                 wfDebug( $fname."\n" );
1537
1538                 if (wfRunHooks('ArticleDelete', $this, $wgUser, $reason)) {
1539                         if ( $this->doDeleteArticle( $reason ) ) {
1540                                 $deleted = $this->mTitle->getPrefixedText();
1541
1542                                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1543                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1544
1545                                 $sk = $wgUser->getSkin();
1546                                 $loglink = $sk->makeKnownLink( $wgContLang->getNsText( NS_PROJECT ) .
1547                                                                                            ':' . wfMsgForContent( 'dellogpage' ),
1548                                                                                            wfMsg( 'deletionlog' ) );
1549
1550                                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
1551
1552                                 $wgOut->addHTML( '<p>' . $text . "</p>\n" );
1553                                 $wgOut->returnToMain( false );
1554                                 wfRunHooks('ArticleDeleteComplete', $this, $wgUser, $reason);
1555                         } else {
1556                                 $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1557                         }
1558                 }
1559         }
1560
1561         /**
1562          * Back-end article deletion
1563          * Deletes the article with database consistency, writes logs, purges caches
1564          * Returns success
1565          */
1566         function doDeleteArticle( $reason ) {
1567                 global $wgUser;
1568                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
1569
1570                 $fname = 'Article::doDeleteArticle';
1571                 wfDebug( $fname."\n" );
1572
1573                 $dbw =& wfGetDB( DB_MASTER );
1574                 $ns = $this->mTitle->getNamespace();
1575                 $t = $this->mTitle->getDBkey();
1576                 $id = $this->mTitle->getArticleID();
1577
1578                 if ( $t == '' || $id == 0 ) {
1579                         return false;
1580                 }
1581
1582                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
1583                 array_push( $wgDeferredUpdateList, $u );
1584
1585                 $linksTo = $this->mTitle->getLinksTo();
1586
1587                 # Squid purging
1588                 if ( $wgUseSquid ) {
1589                         $urls = array(
1590                                 $this->mTitle->getInternalURL(),
1591                                 $this->mTitle->getInternalURL( 'history' )
1592                         );
1593                         foreach ( $linksTo as $linkTo ) {
1594                                 $urls[] = $linkTo->getInternalURL();
1595                         }
1596
1597                         $u = new SquidUpdate( $urls );
1598                         array_push( $wgDeferredUpdateList, $u );
1599
1600                 }
1601
1602                 # Client and file cache invalidation
1603                 Title::touchArray( $linksTo );
1604
1605                 # Move article and history to the "archive" table
1606                 $archiveTable = $dbw->tableName( 'archive' );
1607                 $oldTable = $dbw->tableName( 'old' );
1608                 $curTable = $dbw->tableName( 'cur' );
1609                 $recentchangesTable = $dbw->tableName( 'recentchanges' );
1610                 $linksTable = $dbw->tableName( 'links' );
1611                 $brokenlinksTable = $dbw->tableName( 'brokenlinks' );
1612
1613                 $dbw->insertSelect( 'archive', 'cur',
1614                         array(
1615                                 'ar_namespace' => 'cur_namespace',
1616                                 'ar_title' => 'cur_title',
1617                                 'ar_text' => 'cur_text',
1618                                 'ar_comment' => 'cur_comment',
1619                                 'ar_user' => 'cur_user',
1620                                 'ar_user_text' => 'cur_user_text',
1621                                 'ar_timestamp' => 'cur_timestamp',
1622                                 'ar_minor_edit' => 'cur_minor_edit',
1623                                 'ar_flags' => 0,
1624                         ), array(
1625                                 'cur_namespace' => $ns,
1626                                 'cur_title' => $t,
1627                         ), $fname
1628                 );
1629
1630                 $dbw->insertSelect( 'archive', 'old',
1631                         array(
1632                                 'ar_namespace' => 'old_namespace',
1633                                 'ar_title' => 'old_title',
1634                                 'ar_text' => 'old_text',
1635                                 'ar_comment' => 'old_comment',
1636                                 'ar_user' => 'old_user',
1637                                 'ar_user_text' => 'old_user_text',
1638                                 'ar_timestamp' => 'old_timestamp',
1639                                 'ar_minor_edit' => 'old_minor_edit',
1640                                 'ar_flags' => 'old_flags'
1641                         ), array(
1642                                 'old_namespace' => $ns,
1643                                 'old_title' => $t,
1644                         ), $fname
1645                 );
1646
1647                 # Now that it's safely backed up, delete it
1648
1649                 $dbw->delete( 'cur', array( 'cur_namespace' => $ns, 'cur_title' => $t ), $fname );
1650                 $dbw->delete( 'old', array( 'old_namespace' => $ns, 'old_title' => $t ), $fname );
1651                 $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), $fname );
1652
1653                 # Finally, clean up the link tables
1654                 $t = $this->mTitle->getPrefixedDBkey();
1655
1656                 Article::onArticleDelete( $this->mTitle );
1657
1658                 # Insert broken links
1659                 $brokenLinks = array();
1660                 foreach ( $linksTo as $titleObj ) {
1661                         # Get article ID. Efficient because it was loaded into the cache by getLinksTo().
1662                         $linkID = $titleObj->getArticleID();
1663                         $brokenLinks[] = array( 'bl_from' => $linkID, 'bl_to' => $t );
1664                 }
1665                 $dbw->insert( 'brokenlinks', $brokenLinks, $fname, 'IGNORE' );
1666
1667                 # Delete live links
1668                 $dbw->delete( 'links', array( 'l_to' => $id ) );
1669                 $dbw->delete( 'links', array( 'l_from' => $id ) );
1670                 $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
1671                 $dbw->delete( 'brokenlinks', array( 'bl_from' => $id ) );
1672                 $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
1673
1674                 # Log the deletion
1675                 $log = new LogPage( 'delete' );
1676                 $log->addEntry( 'delete', $this->mTitle, $reason );
1677
1678                 # Clear the cached article id so the interface doesn't act like we exist
1679                 $this->mTitle->resetArticleID( 0 );
1680                 $this->mTitle->mArticleID = 0;
1681                 return true;
1682         }
1683
1684         /**
1685          * Revert a modification
1686          */
1687         function rollback() {
1688                 global $wgUser, $wgOut, $wgRequest;
1689                 $fname = 'Article::rollback';
1690
1691                 if ( ! $wgUser->isAllowed('rollback') ) {
1692                         $wgOut->sysopRequired();
1693                         return;
1694                 }
1695                 if ( wfReadOnly() ) {
1696                         $wgOut->readOnlyPage( $this->getContent( true ) );
1697                         return;
1698                 }
1699                 $dbw =& wfGetDB( DB_MASTER );
1700
1701                 # Enhanced rollback, marks edits rc_bot=1
1702                 $bot = $wgRequest->getBool( 'bot' );
1703
1704                 # Replace all this user's current edits with the next one down
1705                 $tt = $this->mTitle->getDBKey();
1706                 $n = $this->mTitle->getNamespace();
1707
1708                 # Get the last editor, lock table exclusively
1709                 $s = $dbw->selectRow( 'cur',
1710                         array( 'cur_id','cur_user','cur_user_text','cur_comment' ),
1711                         array( 'cur_title' => $tt, 'cur_namespace' => $n ),
1712                         $fname, 'FOR UPDATE'
1713                 );
1714                 if( $s === false ) {
1715                         # Something wrong
1716                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
1717                         return;
1718                 }
1719                 $ut = $dbw->strencode( $s->cur_user_text );
1720                 $uid = $s->cur_user;
1721                 $pid = $s->cur_id;
1722
1723                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
1724                 if( $from != $s->cur_user_text ) {
1725                         $wgOut->setPageTitle(wfmsg('rollbackfailed'));
1726                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
1727                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
1728                                 htmlspecialchars( $from ),
1729                                 htmlspecialchars( $s->cur_user_text ) ) );
1730                         if($s->cur_comment != '') {
1731                                 $wgOut->addHTML(
1732                                         wfMsg('editcomment',
1733                                         htmlspecialchars( $s->cur_comment ) ) );
1734                         }
1735                         return;
1736                 }
1737
1738                 # Get the last edit not by this guy
1739                 $s = $dbw->selectRow( 'old',
1740                         array( 'old_text','old_user','old_user_text','old_timestamp','old_flags' ),
1741                         array(
1742                                 'old_namespace' => $n,
1743                                 'old_title' => $tt,
1744                                 "old_user <> {$uid} OR old_user_text <> '{$ut}'"
1745                         ), $fname, array( 'FOR UPDATE', 'USE INDEX' => 'name_title_timestamp' )
1746                 );
1747                 if( $s === false ) {
1748                         # Something wrong
1749                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
1750                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
1751                         return;
1752                 }
1753
1754                 if ( $bot ) {
1755                         # Mark all reverted edits as bot
1756                         $dbw->update( 'recentchanges',
1757                                 array( /* SET */
1758                                         'rc_bot' => 1
1759                                 ), array( /* WHERE */
1760                                         'rc_user' => $uid,
1761                                         "rc_timestamp > '{$s->old_timestamp}'",
1762                                 ), $fname
1763                         );
1764                 }
1765
1766                 # Save it!
1767                 $newcomment = wfMsg( 'revertpage', $s->old_user_text, $from );
1768                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1769                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1770                 $wgOut->addHTML( '<h2>' . htmlspecialchars( $newcomment ) . "</h2>\n<hr />\n" );
1771                 $this->updateArticle( Revision::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1772                 Article::onArticleEdit( $this->mTitle );
1773                 $wgOut->returnToMain( false );
1774         }
1775
1776
1777         /**
1778          * Do standard deferred updates after page view
1779          * @private
1780          */
1781         function viewUpdates() {
1782                 global $wgDeferredUpdateList;
1783
1784                 if ( 0 != $this->getID() ) {
1785                         global $wgDisableCounters;
1786                         if( !$wgDisableCounters ) {
1787                                 Article::incViewCount( $this->getID() );
1788                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1789                                 array_push( $wgDeferredUpdateList, $u );
1790                         }
1791                 }
1792
1793                 # Update newtalk status if user is reading their own
1794                 # talk page
1795
1796                 global $wgUser;
1797                 if ($this->mTitle->getNamespace() == NS_USER_TALK &&
1798                         $this->mTitle->getText() == $wgUser->getName()) {
1799                         require_once( 'UserTalkUpdate.php' );
1800                         $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(), $this->mTitle->getDBkey(), false, false, false );
1801                 }
1802         }
1803
1804         /**
1805          * Do standard deferred updates after page edit.
1806          * Every 1000th edit, prune the recent changes table.
1807          * @private
1808          * @param string $text
1809          */
1810         function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange) {
1811                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1812                 global $wgMessageCache, $wgUser;
1813
1814                 wfSeedRandom();
1815                 if ( 0 == mt_rand( 0, 999 ) ) {
1816                         $dbw =& wfGetDB( DB_MASTER );
1817                         $cutoff = $dbw->timestamp( time() - ( 7 * 86400 ) );
1818                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1819                         $dbw->query( $sql );
1820                 }
1821                 $id = $this->getID();
1822                 $title = $this->mTitle->getPrefixedDBkey();
1823                 $shortTitle = $this->mTitle->getDBkey();
1824
1825                 $adj = $this->mCountAdjustment;
1826
1827                 if ( 0 != $id ) {
1828                         $u = new LinksUpdate( $id, $title );
1829                         array_push( $wgDeferredUpdateList, $u );
1830                         $u = new SiteStatsUpdate( 0, 1, $adj );
1831                         array_push( $wgDeferredUpdateList, $u );
1832                         $u = new SearchUpdate( $id, $title, $text );
1833                         array_push( $wgDeferredUpdateList, $u );
1834
1835                         # If this is another user's talk page,
1836                         # create a watchlist entry for this page
1837
1838                         if ($this->mTitle->getNamespace() == NS_USER_TALK &&
1839                                 $shortTitle != $wgUser->getName()) {
1840                                 require_once( 'UserTalkUpdate.php' );
1841                                 $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle, $summary, $minoredit, $timestamp_of_pagechange);
1842                         }
1843
1844                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1845                                 $wgMessageCache->replace( $shortTitle, $text );
1846                         }
1847                 }
1848         }
1849
1850         /**
1851          * @todo document this function
1852          * @private
1853          * @param string $oldid         Revision ID of this article revision
1854          */
1855         function setOldSubtitle( $oldid=0 ) {
1856                 global $wgLang, $wgOut, $wgUser;
1857
1858                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1859                 $sk = $wgUser->getSkin();
1860                 $lnk = $sk->makeKnownLinkObj ( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
1861                 $prevlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid );
1862                 $nextlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
1863                 $r = wfMsg( 'revisionasofwithlink', $td, $lnk, $prevlink, $nextlink );
1864                 $wgOut->setSubtitle( $r );
1865         }
1866
1867         /**
1868          * This function is called right before saving the wikitext,
1869          * so we can do things like signatures and links-in-context.
1870          *
1871          * @param string $text
1872          */
1873         function preSaveTransform( $text ) {
1874                 global $wgParser, $wgUser;
1875                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
1876         }
1877
1878         /* Caching functions */
1879
1880         /**
1881          * checkLastModified returns true if it has taken care of all
1882          * output to the client that is necessary for this request.
1883          * (that is, it has sent a cached version of the page)
1884          */
1885         function tryFileCache() {
1886                 static $called = false;
1887                 if( $called ) {
1888                         wfDebug( " tryFileCache() -- called twice!?\n" );
1889                         return;
1890                 }
1891                 $called = true;
1892                 if($this->isFileCacheable()) {
1893                         $touched = $this->mTouched;
1894                         $cache = new CacheManager( $this->mTitle );
1895                         if($cache->isFileCacheGood( $touched )) {
1896                                 global $wgOut;
1897                                 wfDebug( " tryFileCache() - about to load\n" );
1898                                 $cache->loadFromFileCache();
1899                                 return true;
1900                         } else {
1901                                 wfDebug( " tryFileCache() - starting buffer\n" );
1902                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1903                         }
1904                 } else {
1905                         wfDebug( " tryFileCache() - not cacheable\n" );
1906                 }
1907         }
1908
1909         /**
1910          * Check if the page can be cached
1911          * @return bool
1912          */
1913         function isFileCacheable() {
1914                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
1915                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
1916
1917                 return $wgUseFileCache
1918                         and (!$wgShowIPinHeader)
1919                         and ($this->getID() != 0)
1920                         and ($wgUser->getId() == 0)
1921                         and (!$wgUser->getNewtalk())
1922                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
1923                         and (empty( $action ) || $action == 'view')
1924                         and (!isset($oldid))
1925                         and (!isset($diff))
1926                         and (!isset($redirect))
1927                         and (!isset($printable))
1928                         and (!$this->mRedirectedFrom);
1929         }
1930
1931         /**
1932          * Loads cur_touched and returns a value indicating if it should be used
1933          *
1934          */
1935         function checkTouched() {
1936                 $fname = 'Article::checkTouched';
1937                 $id = $this->getID();
1938                 $dbr =& $this->getDB();
1939                 $s = $dbr->selectRow( 'page', array( 'page_touched', 'page_is_redirect' ),
1940                         array( 'page_id' => $id ), $fname, $this->getSelectOptions() );
1941                 if( $s !== false ) {
1942                         $this->mTouched = wfTimestamp( TS_MW, $s->page_touched );
1943                         return !$s->page_is_redirect;
1944                 } else {
1945                         return false;
1946                 }
1947         }
1948
1949         /**
1950          * Edit an article without doing all that other stuff
1951          *
1952          * @param string $text text submitted
1953          * @param string $comment comment submitted
1954          * @param integer $minor whereas it's a minor modification
1955          */
1956         function quickEdit( $text, $comment = '', $minor = 0 ) {
1957                 global $wgUser;
1958                 $fname = 'Article::quickEdit';
1959
1960                 #wfDebugDieBacktrace( "$fname called." );
1961
1962                 wfProfileIn( $fname );
1963
1964                 $dbw =& wfGetDB( DB_MASTER );
1965                 $ns = $this->mTitle->getNamespace();
1966                 $dbkey = $this->mTitle->getDBkey();
1967                 $encDbKey = $dbw->strencode( $dbkey );
1968                 $timestamp = wfTimestampNow();
1969                 # insert new text
1970                 $dbw->insert( 'text', array(
1971                                 'old_text' => $text,
1972                                 'old_flags' => "" ), $fname );
1973                 $text_id = $dbw->insertID();
1974
1975                 # update page
1976                 $dbw->update( 'page', array(
1977                         'page_is_new' => 0,
1978                         'page_touched' => $timestamp,
1979                         'page_is_redirect' => $this->isRedirect( $text ) ? 1 : 0,
1980                         'page_latest' => $text_id ),
1981                         array( 'page_namespace' => $ns, 'page_title' => $dbkey ), $fname );
1982                 # Retrieve page ID
1983                 $page_id = $dbw->selectField( 'page', 'page_id', array( 'page_namespace' => $ns, 'page_title' => $dbkey ), $fname );
1984
1985                 # update revision
1986                 $dbw->insert( 'revision', array(
1987                         'rev_id' => $text_id,
1988                         'rev_page' => $page_id,
1989                         'rev_comment' => $comment,
1990                         'rev_user' => $wgUser->getID(),
1991                         'rev_user_text' => $wgUser->getName(),
1992                         'rev_timestamp' => $timestamp,
1993                         'inverse_timestamp' => wfInvertTimestamp( $timestamp ),
1994                         'rev_minor_edit' => intval($minor) ),
1995                         $fname );
1996 /*
1997                 # Save to history
1998                 $dbw->insertSelect( 'old', 'cur',
1999                         array(
2000                                 'old_namespace' => 'cur_namespace',
2001                                 'old_title' => 'cur_title',
2002                                 'old_text' => 'cur_text',
2003                                 'old_comment' => 'cur_comment',
2004                                 'old_user' => 'cur_user',
2005                                 'old_user_text' => 'cur_user_text',
2006                                 'old_timestamp' => 'cur_timestamp',
2007                                 'inverse_timestamp' => '99999999999999-cur_timestamp',
2008                         ), array(
2009                                 'cur_namespace' => $ns,
2010                                 'cur_title' => $dbkey,
2011                         ), $fname
2012                 );
2013
2014                 # Use the affected row count to determine if the article is new
2015                 $numRows = $dbw->affectedRows();
2016
2017                 # Make an array of fields to be inserted
2018                 $fields = array(
2019                         'cur_text' => $text,
2020                         'cur_timestamp' => $timestamp,
2021                         'cur_user' => $wgUser->getID(),
2022                         'cur_user_text' => $wgUser->getName(),
2023                         'inverse_timestamp' => wfInvertTimestamp( $timestamp ),
2024                         'cur_comment' => $comment,
2025                         'cur_is_redirect' => $this->isRedirect( $text ) ? 1 : 0,
2026                         'cur_minor_edit' => intval($minor),
2027                         'cur_touched' => $dbw->timestamp($timestamp),
2028                 );
2029
2030                 if ( $numRows ) {
2031                         # Update article
2032                         $fields['cur_is_new'] = 0;
2033                         $dbw->update( 'cur', $fields, array( 'cur_namespace' => $ns, 'cur_title' => $dbkey ), $fname );
2034                 } else {
2035                         # Insert new article
2036                         $fields['cur_is_new'] = 1;
2037                         $fields['cur_namespace'] = $ns;
2038                         $fields['cur_title'] = $dbkey;
2039                         $fields['cur_random'] = $rand = wfRandom();
2040                         $dbw->insert( 'cur', $fields, $fname );
2041                 }
2042 */
2043                 wfProfileOut( $fname );
2044         }
2045
2046         /**
2047          * Used to increment the view counter
2048          *
2049          * @static
2050          * @param integer $id article id
2051          */
2052         function incViewCount( $id ) {
2053                 $id = intval( $id );
2054                 global $wgHitcounterUpdateFreq;
2055
2056                 $dbw =& wfGetDB( DB_MASTER );
2057                 $pageTable = $dbw->tableName( 'page' );
2058                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
2059                 $acchitsTable = $dbw->tableName( 'acchits' );
2060
2061                 if( $wgHitcounterUpdateFreq <= 1 ){ //
2062                         $dbw->query( "UPDATE $pageTable SET page_counter = page_counter + 1 WHERE page_id = $id" );
2063                         return;
2064                 }
2065
2066                 # Not important enough to warrant an error page in case of failure
2067                 $oldignore = $dbw->ignoreErrors( true );
2068
2069                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2070
2071                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2072                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2073                         # Most of the time (or on SQL errors), skip row count check
2074                         $dbw->ignoreErrors( $oldignore );
2075                         return;
2076                 }
2077
2078                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2079                 $row = $dbw->fetchObject( $res );
2080                 $rown = intval( $row->n );
2081                 if( $rown >= $wgHitcounterUpdateFreq ){
2082                         wfProfileIn( 'Article::incViewCount-collect' );
2083                         $old_user_abort = ignore_user_abort( true );
2084
2085                         $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2086                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable TYPE=HEAP ".
2087                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2088                                 'GROUP BY hc_id');
2089                         $dbw->query("DELETE FROM $hitcounterTable");
2090                         $dbw->query('UNLOCK TABLES');
2091                         $dbw->query("UPDATE $curTable,$acchitsTable SET cur_counter=cur_counter + hc_n ".
2092                                 'WHERE cur_id = hc_id');
2093                         $dbw->query("DROP TABLE $acchitsTable");
2094
2095                         ignore_user_abort( $old_user_abort );
2096                         wfProfileOut( 'Article::incViewCount-collect' );
2097                 }
2098                 $dbw->ignoreErrors( $oldignore );
2099         }
2100
2101         /**#@+
2102          * The onArticle*() functions are supposed to be a kind of hooks
2103          * which should be called whenever any of the specified actions
2104          * are done.
2105          *
2106          * This is a good place to put code to clear caches, for instance.
2107          *
2108          * This is called on page move and undelete, as well as edit
2109          * @static
2110          * @param $title_obj a title object
2111          */
2112
2113         function onArticleCreate($title_obj) {
2114                 global $wgUseSquid, $wgDeferredUpdateList;
2115
2116                 $titles = $title_obj->getBrokenLinksTo();
2117
2118                 # Purge squid
2119                 if ( $wgUseSquid ) {
2120                         $urls = $title_obj->getSquidURLs();
2121                         foreach ( $titles as $linkTitle ) {
2122                                 $urls[] = $linkTitle->getInternalURL();
2123                         }
2124                         $u = new SquidUpdate( $urls );
2125                         array_push( $wgDeferredUpdateList, $u );
2126                 }
2127
2128                 # Clear persistent link cache
2129                 LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
2130         }
2131
2132         function onArticleDelete($title_obj) {
2133                 LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
2134         }
2135         function onArticleEdit($title_obj) {
2136                 LinkCache::linksccClearPage( $title_obj->getArticleID() );
2137         }
2138         /**#@-*/
2139
2140         /**
2141          * Info about this page
2142          */
2143         function info() {
2144                 global $wgUser, $wgTitle, $wgOut, $wgAllowPageInfo;
2145                 $fname = 'Article::info';
2146
2147                 if ( !$wgAllowPageInfo ) {
2148                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
2149                         return;
2150                 }
2151
2152                 $dbr =& $this->getDB();
2153
2154                 $basenamespace = $wgTitle->getNamespace() & (~1);
2155                 $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace );
2156                 $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace );
2157                 $wl_clause  = array( 'wl_title' => $wgTitle->getDBkey(), 'wl_namespace' => $basenamespace );
2158                 $fullTitle = $wgTitle->makeName($basenamespace, $wgTitle->getDBKey());
2159                 $wgOut->setPagetitle(  $fullTitle );
2160                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
2161
2162                 # first, see if the page exists at all.
2163                 $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2164                 if ($exists < 1) {
2165                         $wgOut->addHTML( wfMsg('noarticletext') );
2166                 } else {
2167                         $numwatchers = $dbr->selectField( 'watchlist', 'COUNT(*)', $wl_clause, $fname,
2168                                 $this->getSelectOptions() );
2169                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $numwatchers) . '</li>' );
2170                         $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2171                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $old + 1) . '</li>');
2172
2173                         # to find number of distinct authors, we need to do some
2174                         # funny stuff because of the cur/old table split:
2175                         # - first, find the name of the 'cur' author
2176                         # - then, find the number of *other* authors in 'old'
2177
2178                         # find 'cur' author
2179                         $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2180                                 $this->getSelectOptions() );
2181
2182                         # find number of 'old' authors excluding 'cur' author
2183                         $authors = $dbr->selectField( 'old', 'COUNT(DISTINCT old_user_text)',
2184                                 $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ), $fname,
2185                                 $this->getSelectOptions() ) + 1;
2186
2187                         # now for the Talk page ...
2188                         $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace+1 );
2189                         $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace+1 );
2190
2191                         # does it exist?
2192                         $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2193
2194                         # number of edits
2195                         if ($exists > 0) {
2196                                 $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2197                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $old + 1) . '</li>');
2198                         }
2199                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $authors) . '</li>' );
2200
2201                         # number of authors
2202                         if ($exists > 0) {
2203                                 $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2204                                         $this->getSelectOptions() );
2205                                 $authors = $dbr->selectField( 'cur', 'COUNT(DISTINCT old_user_text)',
2206                                         $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ),
2207                                         $fname, $this->getSelectOptions() );
2208
2209                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $authors) . '</li></ul>' );
2210                         }
2211                 }
2212         }
2213 }
2214
2215 /**
2216  * Check whether an article is a stub
2217  *
2218  * @public
2219  * @param integer $articleID    ID of the article that is to be checked
2220  */
2221 function wfArticleIsStub( $articleID ) {
2222         global $wgUser;
2223         $fname = 'wfArticleIsStub';
2224
2225         $threshold = $wgUser->getOption('stubthreshold') ;
2226         if ( $threshold > 0 ) {
2227                 $dbr =& wfGetDB( DB_SLAVE );
2228                 $s = $dbr->selectRow( array('page', 'text'),
2229                         array( 'LENGTH(old_text) AS len', 'page_namespace', 'page_is_redirect' ),
2230                         array( 'page_id' => $articleID, "page.page_latest=text.old_id" ),
2231                         $fname ) ;
2232                 if ( $s == false OR $s->page_is_redirect OR $s->page_namespace != 0 ) {
2233                         return false;
2234                 }
2235                 $size = $s->len;
2236                 return ( $size < $threshold );
2237         }
2238         return false;
2239 }
2240
2241 ?>