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