includes/Article.php

   1 <?php
   2 /**
   3  * File for articles
   4  * @package MediaWiki
   5  */
   6
   7 /**
   8  * Need the CacheManager to be loaded
   9  */
  10 require_once( 'CacheManager.php' );
  11 require_once( 'Revision.php' );
  12
  13 $wgArticleCurContentFields = false;
  14 $wgArticleOldContentFields = false;
  15
  16 /**
  17  * Class representing a Wikipedia article and history.
  18  *
  19  * See design.doc for an overview.
  20  * Note: edit user interface and cache support functions have been
  21  * moved to separate EditPage and CacheManager classes.
  22  *
  23  * @package MediaWiki
  24  */
  25 class Article {
  26         /**#@+
  27          * @access private
  28          */
  29         var $mContent, $mContentLoaded;
  30         var $mUser, $mTimestamp, $mUserText;
  31         var $mCounter, $mComment, $mCountAdjustment;
  32         var $mMinorEdit, $mRedirectedFrom;
  33         var $mTouched, $mFileCache, $mTitle;
  34         var $mId, $mTable;
  35         var $mForUpdate;
  36         var $mOldId;
  37         /**#@-*/
  38
  39         /**
  40          * Constructor and clear the article
  41          * @param mixed &$title
  42          */
  43         function Article( &$title ) {
  44                 $this->mTitle =& $title;
  45                 $this->clear();
  46         }
  47
  48         /**
  49          * get the title object of the article
  50          * @public
  51          */
  52         function getTitle() {
  53                 return $this->mTitle;
  54         }
  55
  56         /**
  57           * Clear the object
  58           * @private
  59           */
  60         function clear() {
  61                 $this->mContentLoaded = false;
  62                 $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
  63                 $this->mRedirectedFrom = $this->mUserText =
  64                 $this->mTimestamp = $this->mComment = $this->mFileCache = '';
  65                 $this->mCountAdjustment = 0;
  66                 $this->mTouched = '19700101000000';
  67                 $this->mForUpdate = false;
  68         }
  69
  70         /**
  71          * Note that getContent/loadContent may follow redirects if
  72          * not told otherwise, and so may cause a change to mTitle.
  73          *
  74          * @param $noredir
  75          * @return Return the text of this revision
  76         */
  77         function getContent( $noredir ) {
  78                 global $wgRequest;
  79
  80                 # Get variables from query string :P
  81                 $action = $wgRequest->getText( 'action', 'view' );
  82                 $section = $wgRequest->getText( 'section' );
  83
  84                 $fname =  'Article::getContent';
  85                 wfProfileIn( $fname );
  86
  87                 if ( 0 == $this->getID() ) {
  88                         if ( 'edit' == $action ) {
  89                                 wfProfileOut( $fname );
  90                                 return ''; # was "newarticletext", now moved above the box)
  91                         }
  92                         wfProfileOut( $fname );
  93                         return wfMsg( 'noarticletext' );
  94                 } else {
  95                         $this->loadContent( $noredir );
  96                         # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
  97                         if ( $this->mTitle->getNamespace() == NS_USER_TALK &&
  98                           preg_match('/^\d{1,3}\.\d{1,3}.\d{1,3}\.\d{1,3}$/',$this->mTitle->getText()) &&
  99                           $action=='view'
 100                         ) {
 101                                 wfProfileOut( $fname );
 102                                 return $this->mContent . "\n" .wfMsg('anontalkpagetext');
 103                         } else {
 104                                 if($action=='edit') {
 105                                         if($section!='') {
 106                                                 if($section=='new') {
 107                                                         wfProfileOut( $fname );
 108                                                         return '';
 109                                                 }
 110
 111                                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 112                                                 # comments to be stripped as well)
 113                                                 $rv=$this->getSection($this->mContent,$section);
 114                                                 wfProfileOut( $fname );
 115                                                 return $rv;
 116                                         }
 117                                 }
 118                                 wfProfileOut( $fname );
 119                                 return $this->mContent;
 120                         }
 121                 }
 122         }
 123
 124         /**
 125          * This function returns the text of a section, specified by a number ($section).
 126          * A section is text under a heading like == Heading == or <h1>Heading</h1>, or
 127          * the first section before any such heading (section 0).
 128          *
 129          * If a section contains subsections, these are also returned.
 130          *
 131          * @param string $text text to look in
 132          * @param integer $section section number
 133          * @return string text of the requested section
 134          */
 135         function getSection($text,$section) {
 136
 137                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 138                 # comments to be stripped as well)
 139                 $striparray=array();
 140                 $parser=new Parser();
 141                 $parser->mOutputType=OT_WIKI;
 142                 $striptext=$parser->strip($text, $striparray, true);
 143
 144                 # now that we can be sure that no pseudo-sections are in the source,
 145                 # split it up by section
 146                 $secs =
 147                   preg_split(
 148                   '/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 149                   $striptext, -1,
 150                   PREG_SPLIT_DELIM_CAPTURE);
 151                 if($section==0) {
 152                         $rv=$secs[0];
 153                 } else {
 154                         $headline=$secs[$section*2-1];
 155                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 156                         $hlevel=$matches[1];
 157
 158                         # translate wiki heading into level
 159                         if(strpos($hlevel,'=')!==false) {
 160                                 $hlevel=strlen($hlevel);
 161                         }
 162
 163                         $rv=$headline. $secs[$section*2];
 164                         $count=$section+1;
 165
 166                         $break=false;
 167                         while(!empty($secs[$count*2-1]) && !$break) {
 168
 169                                 $subheadline=$secs[$count*2-1];
 170                                 preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 171                                 $subhlevel=$matches[1];
 172                                 if(strpos($subhlevel,'=')!==false) {
 173                                         $subhlevel=strlen($subhlevel);
 174                                 }
 175                                 if($subhlevel > $hlevel) {
 176                                         $rv.=$subheadline.$secs[$count*2];
 177                                 }
 178                                 if($subhlevel <= $hlevel) {
 179                                         $break=true;
 180                                 }
 181                                 $count++;
 182
 183                         }
 184                 }
 185                 # reinsert stripped tags
 186                 $rv=$parser->unstrip($rv,$striparray);
 187                 $rv=$parser->unstripNoWiki($rv,$striparray);
 188                 $rv=trim($rv);
 189                 return $rv;
 190
 191         }
 192
 193         /**
 194          * Return an array of the columns of the "cur"-table
 195          */
 196         function getContentFields() {
 197                 return $wgArticleContentFields = array(
 198                   'old_text','old_flags',
 199                   'rev_timestamp','rev_user', 'rev_user_text', 'rev_comment','page_counter',
 200                   'page_namespace', 'page_title', 'page_restrictions','page_touched','page_is_redirect' );
 201         }
 202
 203         /**
 204          * Return the oldid of the article that is to be shown.
 205          * For requests with a "direction", this is not the oldid of the
 206          * query
 207          */
 208         function getOldID() {
 209                 global $wgRequest, $wgOut;
 210                 static $lastid;
 211
 212                 if ( isset( $lastid ) ) {
 213                         return $lastid;
 214                 }
 215                 # Query variables :P
 216                 $oldid = $wgRequest->getVal( 'oldid' );
 217                 if ( isset( $oldid ) ) {
 218                         $dbr =& $this->getDB();
 219                         $oldid = IntVal( $oldid );
 220                         if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 221                                 $nextid = $this->mTitle->getNextRevisionID( $oldid );
 222                                 if ( $nextid  ) {
 223                                         $oldid = $nextid;
 224                                 } else {
 225                                         $wgOut->redirect( $this->mTitle->getFullURL( 'redirect=no' ) );
 226                                 }
 227                         } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 228                                 $previd = $this->mTitle->getPreviousRevisionID( $oldid );
 229                                 if ( $previd ) {
 230                                         $oldid = $previd;
 231                                 } else {
 232                                         # TODO
 233                                 }
 234                         }
 235                         $lastid = $oldid;
 236                 }
 237                 return @$oldid; # "@" to be able to return "unset" without PHP complaining
 238         }
 239
 240
 241         /**
 242          * Load the revision (including cur_text) into this object
 243          */
 244         function loadContent( $noredir = false ) {
 245                 global $wgOut, $wgRequest;
 246
 247                 if ( $this->mContentLoaded ) return;
 248
 249                 $dbr =& $this->getDB();
 250                 # Query variables :P
 251                 $oldid = $this->getOldID();
 252                 $redirect = $wgRequest->getVal( 'redirect' );
 253
 254                 $fname = 'Article::loadContent';
 255
 256                 # Pre-fill content with error message so that if something
 257                 # fails we'll have something telling us what we intended.
 258
 259                 $t = $this->mTitle->getPrefixedText();
 260
 261                 $noredir = $noredir || ($wgRequest->getVal( 'redirect' ) == 'no');
 262                 $this->mOldId = $oldid;
 263                 $this->fetchContent( $oldid, $noredir, true );
 264         }
 265
 266         /**
 267          * Get text of an article from database
 268          * @param int $oldid 0 for whatever the latest revision is
 269          * @param bool $noredir Set to true to avoid following redirects
 270          * @param bool $globalTitle Set to true to change the global $wgTitle object when following redirects or other unexpected title changes
 271          * @return string
 272          */
 273         function fetchContent( $oldid = 0, $noredir = false, $globalTitle = false ) {
 274                 if ( $this->mContentLoaded ) {
 275                         return $this->mContent;
 276                 }
 277                 $dbr =& $this->getDB();
 278                 $fname = 'Article::fetchContent';
 279
 280                 # Pre-fill content with error message so that if something
 281                 # fails we'll have something telling us what we intended.
 282                 $t = $this->mTitle->getPrefixedText();
 283                 if( $oldid ) {
 284                         $t .= ',oldid='.$oldid;
 285                 }
 286                 if( isset( $redirect ) ) {
 287                         $redirect = ($redirect == 'no') ? 'no' : 'yes';
 288                         $t .= ',redirect='.$redirect;
 289                 }
 290                 $this->mContent = wfMsg( 'missingarticle', $t );
 291
 292                 if( !$oldid ) {
 293                         # Retrieve current version
 294                         $id = $this->getID();
 295                         if ( 0 == $id ) {
 296                                 return false;
 297                         }
 298
 299                         $s = $dbr->selectRow( array( 'text', 'revision', 'page' ),
 300                                 $this->getContentFields(),
 301                                 "page_id='$id' AND rev_page=page_id AND rev_id=page_latest AND old_id=rev_id",
 302                                 $fname, $this->getSelectOptions() );
 303                 } else {
 304                         # Historical revision
 305                         $s = $dbr->selectRow( array( 'text', 'revision', 'page' ),
 306                                 $this->getContentFields(),
 307                                 "rev_page=page_id AND rev_id='$oldid' AND old_id=rev_id",
 308                                 $fname, $this->getSelectOptions() );
 309                 }
 310                 if ( $s === false ) {
 311                         return false;
 312                 }
 313
 314                 # If we got a redirect, follow it (unless we've been told
 315                 # not to by either the function parameter or the query
 316                 if ( !$oldid && !$noredir ) {
 317                         $rt = Title::newFromRedirect( Revision::getRevisionText( $s ) );
 318                         # process if title object is valid and not special:userlogout
 319                         if ( $rt && ! ( $rt->getNamespace() == NS_SPECIAL && $rt->getText() == 'Userlogout' ) ) {
 320                                 # Gotta hand redirects to special pages differently:
 321                                 # Fill the HTTP response "Location" header and ignore
 322                                 # the rest of the page we're on.
 323                                 if( $globalTitle ) {
 324                                         global $wgOut;
 325                                         if ( $rt->getInterwiki() != '' ) {
 326                                                 $wgOut->redirect( $rt->getFullURL() ) ;
 327                                                 return false;
 328                                         }
 329                                         if ( $rt->getNamespace() == NS_SPECIAL ) {
 330                                                 $wgOut->redirect( $rt->getFullURL() );
 331                                                 return false;
 332                                         }
 333                                 }
 334                                 $rid = $rt->getArticleID();
 335                                 if ( 0 != $rid ) {
 336                                         $redirRow = $dbr->selectRow( array( 'text', 'revision', 'page' ),
 337                                                 $this->getContentFields(),
 338                                                 "page_id='$rid' AND rev_page=page_id AND rev_id=page_latest AND old_id=rev_id",
 339                                                 $fname, $this->getSelectOptions() );
 340
 341                                         if ( $redirRow !== false ) {
 342                                                 $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 343                                                 $this->mTitle = $rt;
 344                                                 $s = $redirRow;
 345                                         }
 346                                 }
 347                         }
 348                 }
 349
 350                 # if the title's different from expected, update...
 351                 if( $globalTitle &&
 352                         ( $this->mTitle->getNamespace() != $s->page_namespace ||
 353                         $this->mTitle->getDBkey() != $s->page_title ) ) {
 354                         $oldTitle = Title::makeTitle( $s->page_namesapce, $s->page_title );
 355                         $this->mTitle = $oldTitle;
 356                         global $wgTitle;
 357                         $wgTitle = $oldTitle;
 358                 }
 359
 360                 # Back to the business at hand...
 361                 $this->mCounter = $s->page_counter;
 362                 $this->mTitle->mRestrictions = explode( ',', trim( $s->page_restrictions ) );
 363                 $this->mTitle->mRestrictionsLoaded = true;
 364                 $this->mTouched = wfTimestamp( TS_MW, $s->page_touched );
 365
 366                 $this->mContent = Revision::getRevisionText( $s );
 367
 368                 $this->mUser = $s->rev_user;
 369                 $this->mUserText = $s->rev_user_text;
 370                 $this->mComment = $s->rev_comment;
 371                 $this->mTimestamp = wfTimestamp( TS_MW, $s->rev_timestamp );
 372
 373                 $this->mContentLoaded = true;
 374                 return $this->mContent;
 375         }
 376
 377         /**
 378          * Gets the article text without using so many damn globals
 379          * Returns false on error
 380          *
 381          * @param integer $oldid
 382          */
 383         function getContentWithoutUsingSoManyDamnGlobals( $oldid = 0, $noredir = false ) {
 384                 return $this->fetchContent( $oldid, $noredir, false );
 385         }
 386
 387         /**
 388          * Read/write accessor to select FOR UPDATE
 389          */
 390         function forUpdate( $x = NULL ) {
 391                 return wfSetVar( $this->mForUpdate, $x );
 392         }
 393
 394         /**
 395          * Get the database which should be used for reads
 396          */
 397         function &getDB() {
 398                 if ( $this->mForUpdate ) {
 399                         return wfGetDB( DB_MASTER );
 400                 } else {
 401                         return wfGetDB( DB_SLAVE );
 402                 }
 403         }
 404
 405         /**
 406          * Get options for all SELECT statements
 407          * Can pass an option array, to which the class-wide options will be appended
 408          */
 409         function getSelectOptions( $options = '' ) {
 410                 if ( $this->mForUpdate ) {
 411                         if ( is_array( $options ) ) {
 412                                 $options[] = 'FOR UPDATE';
 413                         } else {
 414                                 $options = 'FOR UPDATE';
 415                         }
 416                 }
 417                 return $options;
 418         }
 419
 420         /**
 421          * Return the Article ID
 422          */
 423         function getID() {
 424                 if( $this->mTitle ) {
 425                         return $this->mTitle->getArticleID();
 426                 } else {
 427                         return 0;
 428                 }
 429         }
 430
 431         /**
 432          * Get the view count for this article
 433          */
 434         function getCount() {
 435                 if ( -1 == $this->mCounter ) {
 436                         $id = $this->getID();
 437                         $dbr =& $this->getDB();
 438                         $this->mCounter = $dbr->selectField( 'page', 'page_counter', array( 'page_id' => $id ),
 439                                 'Article::getCount', $this->getSelectOptions() );
 440                 }
 441                 return $this->mCounter;
 442         }
 443
 444         /**
 445          * Would the given text make this article a "good" article (i.e.,
 446          * suitable for including in the article count)?
 447          * @param string $text Text to analyze
 448          * @return integer 1 if it can be counted else 0
 449          */
 450         function isCountable( $text ) {
 451                 global $wgUseCommaCount;
 452
 453                 if ( NS_MAIN != $this->mTitle->getNamespace() ) { return 0; }
 454                 if ( $this->isRedirect( $text ) ) { return 0; }
 455                 $token = ($wgUseCommaCount ? ',' : '[[' );
 456                 if ( false === strstr( $text, $token ) ) { return 0; }
 457                 return 1;
 458         }
 459
 460         /**
 461          * Tests if the article text represents a redirect
 462          */
 463         function isRedirect( $text = false ) {
 464                 if ( $text === false ) {
 465                         $this->loadContent();
 466                         $titleObj = Title::newFromRedirect( $this->mText );
 467                 } else {
 468                         $titleObj = Title::newFromRedirect( $text );
 469                 }
 470                 return $titleObj !== NULL;
 471         }
 472
 473         /**
 474          * Loads everything except the text
 475          * This isn't necessary for all uses, so it's only done if needed.
 476          * @private
 477          */
 478         function loadLastEdit() {
 479                 global $wgOut;
 480
 481                 if ( -1 != $this->mUser )
 482                         return;
 483
 484                 $fname = 'Article::loadLastEdit';
 485
 486                 $dbr =& $this->getDB();
 487                 $s = $dbr->selectRow( array( 'revision', 'page') ,
 488                   array( 'rev_user','rev_user_text','rev_timestamp', 'rev_comment','rev_minor_edit' ),
 489                   array( 'page_id' => $this->getID(), 'page_latest=rev_id' ), $fname, $this->getSelectOptions() );
 490
 491                 if ( $s !== false ) {
 492                         $this->mUser = $s->rev_user;
 493                         $this->mUserText = $s->rev_user_text;
 494                         $this->mTimestamp = wfTimestamp(TS_MW,$s->rev_timestamp);
 495                         $this->mComment = $s->rev_comment;
 496                         $this->mMinorEdit = $s->rev_minor_edit;
 497                 }
 498         }
 499
 500         function getTimestamp() {
 501                 $this->loadLastEdit();
 502                 return $this->mTimestamp;
 503         }
 504
 505         function getUser() {
 506                 $this->loadLastEdit();
 507                 return $this->mUser;
 508         }
 509
 510         function getUserText() {
 511                 $this->loadLastEdit();
 512                 return $this->mUserText;
 513         }
 514
 515         function getComment() {
 516                 $this->loadLastEdit();
 517                 return $this->mComment;
 518         }
 519
 520         function getMinorEdit() {
 521                 $this->loadLastEdit();
 522                 return $this->mMinorEdit;
 523         }
 524
 525         function getContributors($limit = 0, $offset = 0) {
 526                 $fname = 'Article::getContributors';
 527
 528                 # XXX: this is expensive; cache this info somewhere.
 529
 530                 $title = $this->mTitle;
 531                 $contribs = array();
 532                 $dbr =& $this->getDB();
 533                 $revTable = $dbr->tableName( 'revision' );
 534                 $userTable = $dbr->tableName( 'user' );
 535                 $encDBkey = $dbr->addQuotes( $title->getDBkey() );
 536                 $ns = $title->getNamespace();
 537                 $user = $this->getUser();
 538                 $pageId = $this->getId();
 539
 540                 $sql = "SELECT rev_user, rev_user_text, user_real_name, MAX(rev_timestamp) as timestamp
 541                         FROM $revTable LEFT JOIN $userTable ON rev_user = user_id
 542                         WHERE rev_page = $pageId
 543                         AND rev_user != $user
 544                         GROUP BY rev_user, rev_user_text, user_real_name
 545                         ORDER BY timestamp DESC";
 546
 547                 if ($limit > 0) { $sql .= ' LIMIT '.$limit; }
 548                 $sql .= ' '. $this->getSelectOptions();
 549
 550                 $res = $dbr->query($sql, $fname);
 551
 552                 while ( $line = $dbr->fetchObject( $res ) ) {
 553                         $contribs[] = array($line->rev_user, $line->rev_user_text, $line->user_real_name);
 554                 }
 555
 556                 $dbr->freeResult($res);
 557                 return $contribs;
 558         }
 559
 560         /**
 561          * This is the default action of the script: just view the page of
 562          * the given title.
 563         */
 564         function view() {
 565                 global $wgUser, $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgLang;
 566                 global $wgLinkCache, $IP, $wgEnableParserCache, $wgStylePath, $wgUseRCPatrol;
 567                 global $wgEnotif;
 568                 $sk = $wgUser->getSkin();
 569
 570                 $fname = 'Article::view';
 571                 wfProfileIn( $fname );
 572                 # Get variables from query string
 573                 $oldid = $this->getOldID();
 574                 $diff = $wgRequest->getVal( 'diff' );
 575                 $rcid = $wgRequest->getVal( 'rcid' );
 576
 577                 $wgOut->setArticleFlag( true );
 578                 $wgOut->setRobotpolicy( 'index,follow' );
 579                 # If we got diff and oldid in the query, we want to see a
 580                 # diff page instead of the article.
 581
 582                 if ( !is_null( $diff ) ) {
 583                         require_once( 'DifferenceEngine.php' );
 584                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 585                         $de = new DifferenceEngine( $oldid, $diff, $rcid );
 586                         $de->showDiffPage();
 587                         if( $diff == 0 ) {
 588                                 # Run view updates for current revision only
 589                                 $this->viewUpdates();
 590                         }
 591                         wfProfileOut( $fname );
 592                         return;
 593                 }
 594                 if ( empty( $oldid ) && $this->checkTouched() ) {
 595                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 596                                 wfProfileOut( $fname );
 597                                 return;
 598                         } else if ( $this->tryFileCache() ) {
 599                                 # tell wgOut that output is taken care of
 600                                 $wgOut->disable();
 601                                 $this->viewUpdates();
 602                                 wfProfileOut( $fname );
 603                                 return;
 604                         }
 605                 }
 606                 # Should the parser cache be used?
 607                 if ( $wgEnableParserCache && intval($wgUser->getOption( 'stubthreshold' )) == 0 && empty( $oldid ) ) {
 608                         $pcache = true;
 609                 } else {
 610                         $pcache = false;
 611                 }
 612
 613                 $outputDone = false;
 614                 if ( $pcache ) {
 615                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 616                                 $outputDone = true;
 617                         }
 618                 }
 619                 if ( !$outputDone ) {
 620                         $text = $this->getContent( false ); # May change mTitle by following a redirect
 621
 622                         # Another whitelist check in case oldid or redirects are altering the title
 623                         if ( !$this->mTitle->userCanRead() ) {
 624                                 $wgOut->loginToUse();
 625                                 $wgOut->output();
 626                                 exit;
 627                         }
 628
 629
 630                         # We're looking at an old revision
 631
 632                         if ( !empty( $oldid ) ) {
 633                                 $this->setOldSubtitle( isset($this->mOldId) ? $this->mOldId : $oldid );
 634                                 $wgOut->setRobotpolicy( 'noindex,follow' );
 635                         }
 636                         if ( '' != $this->mRedirectedFrom ) {
 637                                 $sk = $wgUser->getSkin();
 638                                 $redir = $sk->makeKnownLink( $this->mRedirectedFrom, '',
 639                                   'redirect=no' );
 640                                 $s = wfMsg( 'redirectedfrom', $redir );
 641                                 $wgOut->setSubtitle( $s );
 642
 643                                 # Can't cache redirects
 644                                 $pcache = false;
 645                         }
 646
 647                         # wrap user css and user js in pre and don't parse
 648                         # XXX: use $this->mTitle->usCssJsSubpage() when php is fixed/ a workaround is found
 649                         if (
 650                                 $this->mTitle->getNamespace() == NS_USER &&
 651                                 preg_match('/\\/[\\w]+\\.(css|js)$/', $this->mTitle->getDBkey())
 652                         ) {
 653                                 $wgOut->addWikiText( wfMsg('clearyourcache'));
 654                                 $wgOut->addHTML( '<pre>'.htmlspecialchars($this->mContent)."\n</pre>" );
 655                         } else if ( $rt = Title::newFromRedirect( $text ) ) {
 656                                 # Display redirect
 657                                 $imageUrl = $wgStylePath.'/common/images/redirect.png';
 658                                 $targetUrl = $rt->escapeLocalURL();
 659                                 $titleText = htmlspecialchars( $rt->getPrefixedText() );
 660                                 $link = $sk->makeLinkObj( $rt );
 661
 662                                 $wgOut->addHTML( '<img valign="center" src="'.$imageUrl.'" alt="#REDIRECT" />' .
 663                                   '<span class="redirectText">'.$link.'</span>' );
 664
 665                         } else if ( $pcache ) {
 666                                 # Display content and save to parser cache
 667                                 $wgOut->addPrimaryWikiText( $text, $this );
 668                         } else {
 669                                 # Display content, don't attempt to save to parser cache
 670                                 $wgOut->addWikiText( $text );
 671                         }
 672                 }
 673                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 674                 # If we have been passed an &rcid= parameter, we want to give the user a
 675                 # chance to mark this new article as patrolled.
 676                 if ( $wgUseRCPatrol && !is_null ( $rcid ) && $rcid != 0 && $wgUser->getID() != 0 &&
 677                      ( $wgUser->isAllowed('patrol') || !$wgOnlySysopsCanPatrol ) )
 678                 {
 679                         $wgOut->addHTML( wfMsg ( 'markaspatrolledlink',
 680                                 $sk->makeKnownLinkObj ( $this->mTitle, wfMsg ( 'markaspatrolledtext' ),
 681                                         'action=markpatrolled&rcid='.$rcid )
 682                          ) );
 683                 }
 684
 685                 # Put link titles into the link cache
 686                 $wgOut->transformBuffer();
 687
 688                 # Add link titles as META keywords
 689                 $wgOut->addMetaTags() ;
 690
 691                 $this->viewUpdates();
 692                 wfProfileOut( $fname );
 693
 694                 $wgUser->clearNotification( $this->mTitle );
 695         }
 696
 697         /**
 698          * Theoretically we could defer these whole insert and update
 699          * functions for after display, but that's taking a big leap
 700          * of faith, and we want to be able to report database
 701          * errors at some point.
 702          * @private
 703          */
 704         function insertNewArticle( $text, $summary, $isminor, $watchthis ) {
 705                 global $wgOut, $wgUser;
 706                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 707
 708                 $fname = 'Article::insertNewArticle';
 709
 710                 $this->mCountAdjustment = $this->isCountable( $text );
 711
 712                 $ns = $this->mTitle->getNamespace();
 713                 $ttl = $this->mTitle->getDBkey();
 714                 $text = $this->preSaveTransform( $text );
 715                 if ( $this->isRedirect( $text ) ) { $redir = 1; }
 716                 else { $redir = 0; }
 717
 718                 $now = wfTimestampNow();
 719                 $won = wfInvertTimestamp( $now );
 720                 wfSeedRandom();
 721                 $rand = wfRandom();
 722                 $isminor = ( $isminor && $wgUser->getID() ) ? 1 : 0;
 723
 724                 $mungedText = $text;
 725                 $flags = Revision::compressRevisionText( $mungedText );
 726
 727                 $dbw =& wfGetDB( DB_MASTER );
 728
 729                 $old_id = $dbw->nextSequenceValue( 'text_old_id_seq' );
 730                 $dbw->insert( 'text', array(
 731                         'old_id' => $old_id,
 732                         'old_text' => $mungedText,
 733                         'old_flags' => $flags,
 734                 ), $fname );
 735                 $revisionId = $dbw->insertId();
 736
 737                 $page_id = $dbw->nextSequenceValue( 'page_page_id_seq' );
 738                 $dbw->insert( 'page', array(
 739                         'page_id' => $page_id,
 740                         'page_namespace' => $ns,
 741                         'page_title' => $ttl,
 742                         'page_counter' => 0,
 743                         'page_restrictions' => '',
 744                         'page_is_redirect' => $redir,
 745                         'page_is_new' => 1,
 746                         'page_random' => $rand,
 747                         'page_touched' => $dbw->timestamp($now),
 748                         'page_latest' => $revisionId,
 749                 ), $fname );
 750                 $newid = $dbw->insertId();
 751
 752                 $dbw->insert( 'revision', array(
 753                         'rev_page' => $newid,
 754                         'rev_id' => $revisionId,
 755                         'rev_comment' => $summary,
 756                         'rev_user' => $wgUser->getID(),
 757                         'rev_timestamp' => $dbw->timestamp($now),
 758                         'rev_minor_edit' => $isminor,
 759                         'rev_user_text' => $wgUser->getName(),
 760                         'inverse_timestamp' => $won,
 761                 ), $fname );
 762
 763                 $this->mTitle->resetArticleID( $newid );
 764
 765                 Article::onArticleCreate( $this->mTitle );
 766                 RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary );
 767
 768                 if ($watchthis) {
 769                         if(!$this->mTitle->userIsWatching()) $this->watch();
 770                 } else {
 771                         if ( $this->mTitle->userIsWatching() ) {
 772                                 $this->unwatch();
 773                         }
 774                 }
 775
 776                 # The talk page isn't in the regular link tables, so we need to update manually:
 777                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 778                 $dbw->update( 'page',
 779                         array( 'page_touched' => $dbw->timestamp($now) ),
 780                         array( 'page_namespace' => $talkns,
 781                                'page_title' => $ttl ),
 782                         $fname );
 783
 784                 # standard deferred updates
 785                 $this->editUpdates( $text, $summary, $isminor, $now );
 786
 787                 $oldid = 0; # new article
 788                 $this->showArticle( $text, wfMsg( 'newarticle' ), false, $isminor, $now, $summary, $oldid );
 789         }
 790
 791         /**
 792          * Fetch and uncompress the text for a given revision.
 793          * Can ask by rev_id number or timestamp (set $field)
 794          */
 795         function fetchRevisionText( $revId = null, $field = 'rev_id' ) {
 796                 $fname = 'Article::fetchRevisionText';
 797                 $dbw =& wfGetDB( DB_MASTER );
 798                 if( $revId ) {
 799                         $rev = $dbw->addQuotes( $revId );
 800                 } else {
 801                         $rev = 'page_latest';
 802                 }
 803                 $result = $dbw->query(
 804                         sprintf( "SELECT old_text, old_flags
 805                                 FROM %s,%s,%s
 806                                 WHERE old_id=rev_id AND rev_page=page_id AND page_id=%d
 807                                 AND %s=%s",
 808                                 $dbw->tableName( 'page' ),
 809                                 $dbw->tableName( 'revision' ),
 810                                 $dbw->tableName( 'text' ),
 811                                 IntVal( $this->mTitle->getArticleId() ),
 812                                 $field,
 813                                 $rev ),
 814                         $fname );
 815                 $obj = $dbw->fetchObject( $result );
 816                 $dbw->freeResult( $result );
 817                 $oldtext = Revision::getRevisionText( $obj );
 818                 return $oldtext;
 819         }
 820
 821         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = '', $edittime = NULL) {
 822                 $fname = 'Article::getTextOfLastEditWithSectionReplacedOrAdded';
 823                 if( is_null( $edittime ) ) {
 824                         $oldtext = $this->fetchRevisionText();
 825                 } else {
 826                         $oldtext = $this->fetchRevisionText( $edittime, 'rev_timestamp' );
 827                 }
 828                 if ($section != '') {
 829                         if($section=='new') {
 830                                 if($summary) $subject="== {$summary} ==\n\n";
 831                                 $text=$oldtext."\n\n".$subject.$text;
 832                         } else {
 833
 834                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 835                                 # comments to be stripped as well)
 836                                 $striparray=array();
 837                                 $parser=new Parser();
 838                                 $parser->mOutputType=OT_WIKI;
 839                                 $oldtext=$parser->strip($oldtext, $striparray, true);
 840
 841                                 # now that we can be sure that no pseudo-sections are in the source,
 842                                 # split it up
 843                                 # Unfortunately we can't simply do a preg_replace because that might
 844                                 # replace the wrong section, so we have to use the section counter instead
 845                                 $secs=preg_split('/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 846                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 847                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 848
 849                                 # section 0 is top (intro) section
 850                                 if($section!=0) {
 851
 852                                         # headline of old section - we need to go through this section
 853                                         # to determine if there are any subsections that now need to
 854                                         # be erased, as the mother section has been replaced with
 855                                         # the text of all subsections.
 856                                         $headline=$secs[$section*2-1];
 857                                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 858                                         $hlevel=$matches[1];
 859
 860                                         # determine headline level for wikimarkup headings
 861                                         if(strpos($hlevel,'=')!==false) {
 862                                                 $hlevel=strlen($hlevel);
 863                                         }
 864
 865                                         $secs[$section*2-1]=''; // erase old headline
 866                                         $count=$section+1;
 867                                         $break=false;
 868                                         while(!empty($secs[$count*2-1]) && !$break) {
 869
 870                                                 $subheadline=$secs[$count*2-1];
 871                                                 preg_match(
 872                                                  '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 873                                                 $subhlevel=$matches[1];
 874                                                 if(strpos($subhlevel,'=')!==false) {
 875                                                         $subhlevel=strlen($subhlevel);
 876                                                 }
 877                                                 if($subhlevel > $hlevel) {
 878                                                         // erase old subsections
 879                                                         $secs[$count*2-1]='';
 880                                                         $secs[$count*2]='';
 881                                                 }
 882                                                 if($subhlevel <= $hlevel) {
 883                                                         $break=true;
 884                                                 }
 885                                                 $count++;
 886
 887                                         }
 888
 889                                 }
 890                                 $text=join('',$secs);
 891                                 # reinsert the stuff that we stripped out earlier
 892                                 $text=$parser->unstrip($text,$striparray);
 893                                 $text=$parser->unstripNoWiki($text,$striparray);
 894                         }
 895
 896                 }
 897                 return $text;
 898         }
 899
 900         /**
 901          * Change an existing article. Puts the previous version back into the old table, updates RC
 902          * and all necessary caches, mostly via the deferred update array.
 903          *
 904          * It is possible to call this function from a command-line script, but note that you should
 905          * first set $wgUser, and clean up $wgDeferredUpdates after each edit.
 906          */
 907         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
 908                 global $wgOut, $wgUser;
 909                 global $wgDBtransactions, $wgMwRedir;
 910                 global $wgUseSquid, $wgInternalServer;
 911
 912                 $fname = 'Article::updateArticle';
 913                 $good = true;
 914
 915                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
 916                 if ( $minor && $wgUser->getID() ) { $me2 = 1; } else { $me2 = 0; }
 917                 if ( $this->isRedirect( $text ) ) {
 918                         # Remove all content but redirect
 919                         # This could be done by reconstructing the redirect from a title given by
 920                         # Title::newFromRedirect(), but then we wouldn't know which synonym the user
 921                         # wants to see
 922                         if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ')[^\\n]+)/i', $text, $m ) ) {
 923                                 $redir = 1;
 924                                 $text = $m[1] . "\n";
 925                         }
 926                 }
 927                 else { $redir = 0; }
 928
 929                 $text = $this->preSaveTransform( $text );
 930                 $dbw =& wfGetDB( DB_MASTER );
 931
 932                 # Update article, but only if changed.
 933
 934                 # It's important that we either rollback or complete, otherwise an attacker could
 935                 # overwrite cur entries by sending precisely timed user aborts. Random bored users
 936                 # could conceivably have the same effect, especially if cur is locked for long periods.
 937                 if( $wgDBtransactions ) {
 938                         $dbw->query( 'BEGIN', $fname );
 939                 } else {
 940                         $userAbort = ignore_user_abort( true );
 941                 }
 942
 943                 $oldtext = $this->getContent( true );
 944
 945                 if ( 0 != strcmp( $text, $oldtext ) ) {
 946                         $this->mCountAdjustment = $this->isCountable( $text )
 947                           - $this->isCountable( $oldtext );
 948                         $now = wfTimestampNow();
 949                         $won = wfInvertTimestamp( $now );
 950
 951                         $mungedText = $text;
 952                         $flags = Revision::compressRevisionText( $newtext );
 953
 954                         $lastRevision = $dbw->selectField(
 955                                 'page', 'page_latest', array( 'page_id' => $this->getId() ) );
 956
 957                         # Record the text to the text table
 958                         $old_id = $dbw->nextSequenceValue( 'text_old_id_val' );
 959                         $dbw->insert( 'text',
 960                                 array(
 961                                         'old_id' => $old_id,
 962                                         'old_text' => $mungedText,
 963                                         'old_flags' => $flags,
 964                                 ), $fname
 965                         );
 966                         $revisionId = $dbw->insertId();
 967
 968                         # Record the edit in revisions
 969                         $dbw->insert( 'revision',
 970                                 array(
 971                                         'rev_id' => $revisionId,
 972                                         'rev_page' => $this->getID(),
 973                                         'rev_comment' => $summary,
 974                                         'rev_minor_edit' => $me2,
 975                                         'rev_user' => $wgUser->getID(),
 976                                         'rev_user_text' => $wgUser->getName(),
 977                                         'rev_timestamp' => $dbw->timestamp( $now ),
 978                                         'inverse_timestamp' => $won
 979                                 ), $fname
 980                         );
 981
 982                         # Update page
 983                         $dbw->update( 'page',
 984                                 array( /* SET */
 985                                         'page_latest' => $revisionId,
 986                                         'page_touched' => $dbw->timestamp( $now ),
 987                                         'page_is_new' => 0,
 988                                         'page_is_redirect' => $redir,
 989                                 ), array( /* WHERE */
 990                                         'page_id' => $this->getID(),
 991                                         'page_latest' => $lastRevision, # Paranoia
 992                                 ), $fname
 993                         );
 994
 995                         if( $dbw->affectedRows() == 0 ) {
 996                                 /* Belated edit conflict! Run away!! */
 997                                 $good = false;
 998                         } else {
 999                                 # Update recentchanges and purge cache and whatnot
1000                                 $bot = (int)($wgUser->isBot() || $forceBot);
1001                                 RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
1002                                         $lastRevision, $this->getTimestamp(), $bot );
1003                                 Article::onArticleEdit( $this->mTitle );
1004                         }
1005                 }
1006
1007                 if( $wgDBtransactions ) {
1008                         $dbw->query( 'COMMIT', $fname );
1009                 } else {
1010                         ignore_user_abort( $userAbort );
1011                 }
1012
1013                 if ( $good ) {
1014                 if ($watchthis) {
1015                         if (!$this->mTitle->userIsWatching()) $this->watch();
1016                 } else {
1017                         if ( $this->mTitle->userIsWatching() ) {
1018                                 $this->unwatch();
1019                         }
1020                 }
1021                 # standard deferred updates
1022                 $this->editUpdates( $text, $summary, $minor, $now );
1023
1024
1025                 $urls = array();
1026                 # Template namespace
1027                 # Purge all articles linking here
1028                 if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
1029                         $titles = $this->mTitle->getLinksTo();
1030                         Title::touchArray( $titles );
1031                         if ( $wgUseSquid ) {
1032                                         foreach ( $titles as $title ) {
1033                                                 $urls[] = $title->getInternalURL();
1034                                         }
1035                         }
1036                 }
1037
1038                 # Squid updates
1039                 if ( $wgUseSquid ) {
1040                         $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
1041                         $u = new SquidUpdate( $urls );
1042                         $u->doUpdate();
1043                 }
1044
1045                 $this->showArticle( $text, wfMsg( 'updated' ), $sectionanchor, $me2, $now, $summary, $lastRevision );
1046                 }
1047                 return $good;
1048         }
1049
1050         /**
1051          * After we've either updated or inserted the article, update
1052          * the link tables and redirect to the new page.
1053          */
1054         function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid ) {
1055                 global $wgOut, $wgUser, $wgLinkCache, $wgEnotif;
1056
1057                 $wgLinkCache = new LinkCache();
1058                 # Select for update
1059                 $wgLinkCache->forUpdate( true );
1060
1061                 # Get old version of link table to allow incremental link updates
1062                 $wgLinkCache->preFill( $this->mTitle );
1063                 $wgLinkCache->clear();
1064
1065                 # Parse the text and replace links with placeholders
1066                 $wgOut = new OutputPage();
1067                 $wgOut->addWikiText( $text );
1068
1069                 # Look up the links in the DB and add them to the link cache
1070                 $wgOut->transformBuffer( RLH_FOR_UPDATE );
1071
1072                 if( $this->isRedirect( $text ) )
1073                         $r = 'redirect=no';
1074                 else
1075                         $r = '';
1076                 $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
1077
1078                 # this call would better fit into RecentChange::notifyEdit and RecentChange::notifyNew .
1079                 # this will be improved later (to-do)
1080
1081                 include_once( "UserMailer.php" );
1082                 $wgEnotif = new EmailNotification ();
1083                 $wgEnotif->NotifyOnPageChange( $wgUser->getID(), $this->mTitle->getDBkey(), $this->mTitle->getNamespace(),$now, $summary, $me2, $oldid );
1084         }
1085
1086         /**
1087          * Validate article
1088          * @todo document this function a bit more
1089          */
1090         function validate () {
1091                 global $wgOut, $wgUseValidation;
1092                 if( $wgUseValidation ) {
1093                         require_once ( 'SpecialValidate.php' ) ;
1094                         $wgOut->setPagetitle( wfMsg( 'validate' ) . ': ' . $this->mTitle->getPrefixedText() );
1095                         $wgOut->setRobotpolicy( 'noindex,follow' );
1096                         if( $this->mTitle->getNamespace() != 0 ) {
1097                                 $wgOut->addHTML( wfMsg( 'val_validate_article_namespace_only' ) );
1098                                 return;
1099                         }
1100                         $v = new Validation;
1101                         $v->validate_form( $this->mTitle->getDBkey() );
1102                 } else {
1103                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
1104                 }
1105         }
1106
1107         /**
1108          * Mark this particular edit as patrolled
1109          */
1110         function markpatrolled() {
1111                 global $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgUseRCPatrol, $wgUser;
1112                 $wgOut->setRobotpolicy( 'noindex,follow' );
1113
1114                 if ( !$wgUseRCPatrol )
1115                 {
1116                         $wgOut->errorpage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1117                         return;
1118                 }
1119                 if ( $wgUser->getID() == 0 )
1120                 {
1121                         $wgOut->loginToUse();
1122                         return;
1123                 }
1124                 if ( $wgOnlySysopsCanPatrol && !$wgUser->isAllowed('patrol') )
1125                 {
1126                         $wgOut->sysopRequired();
1127                         return;
1128                 }
1129                 $rcid = $wgRequest->getVal( 'rcid' );
1130                 if ( !is_null ( $rcid ) )
1131                 {
1132                         RecentChange::markPatrolled( $rcid );
1133                         $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
1134                         $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
1135
1136                         $rcTitle = Title::makeTitle( NS_SPECIAL, 'Recentchanges' );
1137                         $wgOut->returnToMain( false, $rcTitle->getPrefixedText() );
1138                 }
1139                 else
1140                 {
1141                         $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1142                 }
1143         }
1144
1145
1146         /**
1147          * Add this page to $wgUser's watchlist
1148          */
1149
1150         function watch() {
1151
1152                 global $wgUser, $wgOut;
1153
1154                 if ( 0 == $wgUser->getID() ) {
1155                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1156                         return;
1157                 }
1158                 if ( wfReadOnly() ) {
1159                         $wgOut->readOnlyPage();
1160                         return;
1161                 }
1162
1163                 if (wfRunHooks('WatchArticle', $wgUser, $this)) {
1164
1165                         $wgUser->addWatch( $this->mTitle );
1166                         $wgUser->saveSettings();
1167
1168                         wfRunHooks('WatchArticleComplete', $wgUser, $this);
1169
1170                         $wgOut->setPagetitle( wfMsg( 'addedwatch' ) );
1171                         $wgOut->setRobotpolicy( 'noindex,follow' );
1172
1173                         $link = $this->mTitle->getPrefixedText();
1174                         $text = wfMsg( 'addedwatchtext', $link );
1175                         $wgOut->addWikiText( $text );
1176                 }
1177
1178                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1179         }
1180
1181         /**
1182          * Stop watching a page
1183          */
1184
1185         function unwatch() {
1186
1187                 global $wgUser, $wgOut;
1188
1189                 if ( 0 == $wgUser->getID() ) {
1190                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1191                         return;
1192                 }
1193                 if ( wfReadOnly() ) {
1194                         $wgOut->readOnlyPage();
1195                         return;
1196                 }
1197
1198                 if (wfRunHooks('UnwatchArticle', $wgUser, $this)) {
1199
1200                         $wgUser->removeWatch( $this->mTitle );
1201                         $wgUser->saveSettings();
1202
1203                         wfRunHooks('UnwatchArticleComplete', $wgUser, $this);
1204
1205                         $wgOut->setPagetitle( wfMsg( 'removedwatch' ) );
1206                         $wgOut->setRobotpolicy( 'noindex,follow' );
1207
1208                         $link = $this->mTitle->getPrefixedText();
1209                         $text = wfMsg( 'removedwatchtext', $link );
1210                         $wgOut->addWikiText( $text );
1211                 }
1212
1213                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1214         }
1215
1216         /**
1217          * protect a page
1218          */
1219         function protect( $limit = 'sysop' ) {
1220                 global $wgUser, $wgOut, $wgRequest;
1221
1222                 if ( ! $wgUser->isAllowed('protect') ) {
1223                         $wgOut->sysopRequired();
1224                         return;
1225                 }
1226                 if ( wfReadOnly() ) {
1227                         $wgOut->readOnlyPage();
1228                         return;
1229                 }
1230                 $id = $this->mTitle->getArticleID();
1231                 if ( 0 == $id ) {
1232                         $wgOut->fatalError( wfMsg( 'badarticleerror' ) );
1233                         return;
1234                 }
1235
1236                 $confirm = $wgRequest->getBool( 'wpConfirmProtect' ) && $wgRequest->wasPosted();
1237                 $moveonly = $wgRequest->getBool( 'wpMoveOnly' );
1238                 $reason = $wgRequest->getText( 'wpReasonProtect' );
1239
1240                 if ( $confirm ) {
1241                         $dbw =& wfGetDB( DB_MASTER );
1242                         $dbw->update( 'page',
1243                                 array( /* SET */
1244                                         'page_touched' => $dbw->timestamp(),
1245                                         'page_restrictions' => (string)$limit
1246                                 ), array( /* WHERE */
1247                                         'page_id' => $id
1248                                 ), 'Article::protect'
1249                         );
1250
1251                         $restrictions = "move=" . $limit;
1252                         if( !$moveonly ) {
1253                                 $restrictions .= ":edit=" . $limit;
1254                         }
1255                         if (wfRunHooks('ArticleProtect', $this, $wgUser, $limit == 'sysop', $reason, $moveonly)) {
1256
1257                                 $dbw =& wfGetDB( DB_MASTER );
1258                                 $dbw->update( 'page',
1259                                                           array( /* SET */
1260                                                                          'page_touched' => $dbw->timestamp(),
1261                                                                          'page_restrictions' => $restrictions
1262                                                                          ), array( /* WHERE */
1263                                                                                            'page_id' => $id
1264                                                                                            ), 'Article::protect'
1265                                                           );
1266
1267                                 wfRunHooks('ArticleProtectComplete', $this, $wgUser, $limit == 'sysop', $reason, $moveonly);
1268
1269                                 $log = new LogPage( 'protect' );
1270                                 if ( $limit === '' ) {
1271                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1272                                 } else {
1273                                         $log->addEntry( 'protect', $this->mTitle, $reason );
1274                                 }
1275                                 $wgOut->redirect( $this->mTitle->getFullURL() );
1276                         }
1277                         return;
1278                 } else {
1279                         $reason = htmlspecialchars( wfMsg( 'protectreason' ) );
1280                         return $this->confirmProtect( '', $reason, $limit );
1281                 }
1282         }
1283
1284         /**
1285          * Output protection confirmation dialog
1286          */
1287         function confirmProtect( $par, $reason, $limit = 'sysop'  ) {
1288                 global $wgOut;
1289
1290                 wfDebug( "Article::confirmProtect\n" );
1291
1292                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1293                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1294
1295                 $check = '';
1296                 $protcom = '';
1297                 $moveonly = '';
1298
1299                 if ( $limit === '' ) {
1300                         $wgOut->setPageTitle( wfMsg( 'confirmunprotect' ) );
1301                         $wgOut->setSubtitle( wfMsg( 'unprotectsub', $sub ) );
1302                         $wgOut->addWikiText( wfMsg( 'confirmunprotecttext' ) );
1303                         $check = htmlspecialchars( wfMsg( 'confirmunprotect' ) );
1304                         $protcom = htmlspecialchars( wfMsg( 'unprotectcomment' ) );
1305                         $formaction = $this->mTitle->escapeLocalURL( 'action=unprotect' . $par );
1306                 } else {
1307                         $wgOut->setPageTitle( wfMsg( 'confirmprotect' ) );
1308                         $wgOut->setSubtitle( wfMsg( 'protectsub', $sub ) );
1309                         $wgOut->addWikiText( wfMsg( 'confirmprotecttext' ) );
1310                         $check = htmlspecialchars( wfMsg( 'confirmprotect' ) );
1311                         $moveonly = htmlspecialchars( wfMsg( 'protectmoveonly' ) );
1312                         $protcom = htmlspecialchars( wfMsg( 'protectcomment' ) );
1313                         $formaction = $this->mTitle->escapeLocalURL( 'action=protect' . $par );
1314                 }
1315
1316                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1317
1318                 $wgOut->addHTML( "
1319 <form id='protectconfirm' method='post' action=\"{$formaction}\">
1320         <table border='0'>
1321                 <tr>
1322                         <td align='right'>
1323                                 <label for='wpReasonProtect'>{$protcom}:</label>
1324                         </td>
1325                         <td align='left'>
1326                                 <input type='text' size='60' name='wpReasonProtect' id='wpReasonProtect' value=\"" . htmlspecialchars( $reason ) . "\" />
1327                         </td>
1328                 </tr>
1329                 <tr>
1330                         <td>&nbsp;</td>
1331                 </tr>
1332                 <tr>
1333                         <td align='right'>
1334                                 <input type='checkbox' name='wpConfirmProtect' value='1' id='wpConfirmProtect' />
1335                         </td>
1336                         <td>
1337                                 <label for='wpConfirmProtect'>{$check}</label>
1338                         </td>
1339                 </tr> " );
1340                 if($moveonly != '') {
1341                         $wgOut->AddHTML( "
1342                 <tr>
1343                         <td align='right'>
1344                                 <input type='checkbox' name='wpMoveOnly' value='1' id='wpMoveOnly' />
1345                         </td>
1346                         <td>
1347                                 <label for='wpMoveOnly'>{$moveonly}</label>
1348                         </td>
1349                 </tr> " );
1350                 }
1351                 $wgOut->addHTML( "
1352                 <tr>
1353                         <td>&nbsp;</td>
1354                         <td>
1355                                 <input type='submit' name='wpConfirmProtectB' value=\"{$confirm}\" />
1356                         </td>
1357                 </tr>
1358         </table>
1359 </form>\n" );
1360
1361                 $wgOut->returnToMain( false );
1362         }
1363
1364         /**
1365          * Unprotect the pages
1366          */
1367         function unprotect() {
1368                 return $this->protect( '' );
1369         }
1370
1371         /*
1372          * UI entry point for page deletion
1373          */
1374         function delete() {
1375                 global $wgUser, $wgOut, $wgMessageCache, $wgRequest;
1376                 $fname = 'Article::delete';
1377                 $confirm = $wgRequest->getBool( 'wpConfirm' ) && $wgRequest->wasPosted();
1378                 $reason = $wgRequest->getText( 'wpReason' );
1379
1380                 # This code desperately needs to be totally rewritten
1381
1382                 # Check permissions
1383                 if ( ( ! $wgUser->isAllowed('delete') ) ) {
1384                         $wgOut->sysopRequired();
1385                         return;
1386                 }
1387                 if ( wfReadOnly() ) {
1388                         $wgOut->readOnlyPage();
1389                         return;
1390                 }
1391
1392                 # Better double-check that it hasn't been deleted yet!
1393                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1394                 if ( ( '' == trim( $this->mTitle->getText() ) )
1395                   or ( $this->mTitle->getArticleId() == 0 ) ) {
1396                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1397                         return;
1398                 }
1399
1400                 if ( $confirm ) {
1401                         $this->doDelete( $reason );
1402                         return;
1403                 }
1404
1405                 # determine whether this page has earlier revisions
1406                 # and insert a warning if it does
1407                 # we select the text because it might be useful below
1408                 $dbr =& $this->getDB();
1409                 $ns = $this->mTitle->getNamespace();
1410                 $title = $this->mTitle->getDBkey();
1411                 $old = $dbr->selectRow( 'old',
1412                         array( 'old_text', 'old_flags' ),
1413                         array(
1414                                 'old_namespace' => $ns,
1415                                 'old_title' => $title,
1416                         ), $fname, $this->getSelectOptions( array( 'ORDER BY' => 'inverse_timestamp' ) )
1417                 );
1418
1419                 if( $old !== false && !$confirm ) {
1420                         $skin=$wgUser->getSkin();
1421                         $wgOut->addHTML('<b>'.wfMsg('historywarning'));
1422                         $wgOut->addHTML( $skin->historyLink() .'</b>');
1423                 }
1424
1425                 # Fetch cur_text
1426                 $s = $dbr->selectRow( 'cur',
1427                         array( 'cur_text' ),
1428                         array(
1429                                 'cur_namespace' => $ns,
1430                                 'cur_title' => $title,
1431                         ), $fname, $this->getSelectOptions()
1432                 );
1433
1434                 if( $s !== false ) {
1435                         # if this is a mini-text, we can paste part of it into the deletion reason
1436
1437                         #if this is empty, an earlier revision may contain "useful" text
1438                         $blanked = false;
1439                         if($s->cur_text != '') {
1440                                 $text=$s->cur_text;
1441                         } else {
1442                                 if($old) {
1443                                         $text = Revision::getRevisionText( $old );
1444                                         $blanked = true;
1445                                 }
1446
1447                         }
1448
1449                         $length=strlen($text);
1450
1451                         # this should not happen, since it is not possible to store an empty, new
1452                         # page. Let's insert a standard text in case it does, though
1453                         if($length == 0 && $reason === '') {
1454                                 $reason = wfMsg('exblank');
1455                         }
1456
1457                         if($length < 500 && $reason === '') {
1458
1459                                 # comment field=255, let's grep the first 150 to have some user
1460                                 # space left
1461                                 $text=substr($text,0,150);
1462                                 # let's strip out newlines and HTML tags
1463                                 $text=preg_replace('/\"/',"'",$text);
1464                                 $text=preg_replace('/\</','&lt;',$text);
1465                                 $text=preg_replace('/\>/','&gt;',$text);
1466                                 $text=preg_replace("/[\n\r]/",'',$text);
1467                                 if(!$blanked) {
1468                                         $reason=wfMsg('excontent'). " '".$text;
1469                                 } else {
1470                                         $reason=wfMsg('exbeforeblank') . " '".$text;
1471                                 }
1472                                 if($length>150) { $reason .= '...'; } # we've only pasted part of the text
1473                                 $reason.="'";
1474                         }
1475                 }
1476
1477                 return $this->confirmDelete( '', $reason );
1478         }
1479
1480         /**
1481          * Output deletion confirmation dialog
1482          */
1483         function confirmDelete( $par, $reason ) {
1484                 global $wgOut;
1485
1486                 wfDebug( "Article::confirmDelete\n" );
1487
1488                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1489                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1490                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1491                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1492
1493                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1494
1495                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1496                 $check = htmlspecialchars( wfMsg( 'confirmcheck' ) );
1497                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1498
1499                 $wgOut->addHTML( "
1500 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1501         <table border='0'>
1502                 <tr>
1503                         <td align='right'>
1504                                 <label for='wpReason'>{$delcom}:</label>
1505                         </td>
1506                         <td align='left'>
1507                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1508                         </td>
1509                 </tr>
1510                 <tr>
1511                         <td>&nbsp;</td>
1512                 </tr>
1513                 <tr>
1514                         <td align='right'>
1515                                 <input type='checkbox' name='wpConfirm' value='1' id='wpConfirm' />
1516                         </td>
1517                         <td>
1518                                 <label for='wpConfirm'>{$check}</label>
1519                         </td>
1520                 </tr>
1521                 <tr>
1522                         <td>&nbsp;</td>
1523                         <td>
1524                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1525                         </td>
1526                 </tr>
1527         </table>
1528 </form>\n" );
1529
1530                 $wgOut->returnToMain( false );
1531         }
1532
1533
1534         /**
1535          * Perform a deletion and output success or failure messages
1536          */
1537         function doDelete( $reason ) {
1538                 global $wgOut, $wgUser, $wgContLang;
1539                 $fname = 'Article::doDelete';
1540                 wfDebug( $fname."\n" );
1541
1542                 if (wfRunHooks('ArticleDelete', $this, $wgUser, $reason)) {
1543                         if ( $this->doDeleteArticle( $reason ) ) {
1544                                 $deleted = $this->mTitle->getPrefixedText();
1545
1546                                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1547                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1548
1549                                 $sk = $wgUser->getSkin();
1550                                 $loglink = $sk->makeKnownLink( $wgContLang->getNsText( NS_PROJECT ) .
1551                                                                                            ':' . wfMsgForContent( 'dellogpage' ),
1552                                                                                            wfMsg( 'deletionlog' ) );
1553
1554                                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
1555
1556                                 $wgOut->addHTML( '<p>' . $text . "</p>\n" );
1557                                 $wgOut->returnToMain( false );
1558                                 wfRunHooks('ArticleDeleteComplete', $this, $wgUser, $reason);
1559                         } else {
1560                                 $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1561                         }
1562                 }
1563         }
1564
1565         /**
1566          * Back-end article deletion
1567          * Deletes the article with database consistency, writes logs, purges caches
1568          * Returns success
1569          */
1570         function doDeleteArticle( $reason ) {
1571                 global $wgUser;
1572                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
1573
1574                 $fname = 'Article::doDeleteArticle';
1575                 wfDebug( $fname."\n" );
1576
1577                 $dbw =& wfGetDB( DB_MASTER );
1578                 $ns = $this->mTitle->getNamespace();
1579                 $t = $this->mTitle->getDBkey();
1580                 $id = $this->mTitle->getArticleID();
1581
1582                 if ( $t == '' || $id == 0 ) {
1583                         return false;
1584                 }
1585
1586                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
1587                 array_push( $wgDeferredUpdateList, $u );
1588
1589                 $linksTo = $this->mTitle->getLinksTo();
1590
1591                 # Squid purging
1592                 if ( $wgUseSquid ) {
1593                         $urls = array(
1594                                 $this->mTitle->getInternalURL(),
1595                                 $this->mTitle->getInternalURL( 'history' )
1596                         );
1597                         foreach ( $linksTo as $linkTo ) {
1598                                 $urls[] = $linkTo->getInternalURL();
1599                         }
1600
1601                         $u = new SquidUpdate( $urls );
1602                         array_push( $wgDeferredUpdateList, $u );
1603
1604                 }
1605
1606                 # Client and file cache invalidation
1607                 Title::touchArray( $linksTo );
1608
1609                 # Move article and history to the "archive" table
1610                 $archiveTable = $dbw->tableName( 'archive' );
1611                 $oldTable = $dbw->tableName( 'old' );
1612                 $curTable = $dbw->tableName( 'cur' );
1613                 $recentchangesTable = $dbw->tableName( 'recentchanges' );
1614                 $linksTable = $dbw->tableName( 'links' );
1615                 $brokenlinksTable = $dbw->tableName( 'brokenlinks' );
1616
1617                 $dbw->insertSelect( 'archive', 'cur',
1618                         array(
1619                                 'ar_namespace' => 'cur_namespace',
1620                                 'ar_title' => 'cur_title',
1621                                 'ar_text' => 'cur_text',
1622                                 'ar_comment' => 'cur_comment',
1623                                 'ar_user' => 'cur_user',
1624                                 'ar_user_text' => 'cur_user_text',
1625                                 'ar_timestamp' => 'cur_timestamp',
1626                                 'ar_minor_edit' => 'cur_minor_edit',
1627                                 'ar_flags' => 0,
1628                         ), array(
1629                                 'cur_namespace' => $ns,
1630                                 'cur_title' => $t,
1631                         ), $fname
1632                 );
1633
1634                 $dbw->insertSelect( 'archive', 'old',
1635                         array(
1636                                 'ar_namespace' => 'old_namespace',
1637                                 'ar_title' => 'old_title',
1638                                 'ar_text' => 'old_text',
1639                                 'ar_comment' => 'old_comment',
1640                                 'ar_user' => 'old_user',
1641                                 'ar_user_text' => 'old_user_text',
1642                                 'ar_timestamp' => 'old_timestamp',
1643                                 'ar_minor_edit' => 'old_minor_edit',
1644                                 'ar_flags' => 'old_flags'
1645                         ), array(
1646                                 'old_namespace' => $ns,
1647                                 'old_title' => $t,
1648                         ), $fname
1649                 );
1650
1651                 # Now that it's safely backed up, delete it
1652
1653                 $dbw->delete( 'cur', array( 'cur_namespace' => $ns, 'cur_title' => $t ), $fname );
1654                 $dbw->delete( 'old', array( 'old_namespace' => $ns, 'old_title' => $t ), $fname );
1655                 $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), $fname );
1656
1657                 # Finally, clean up the link tables
1658                 $t = $this->mTitle->getPrefixedDBkey();
1659
1660                 Article::onArticleDelete( $this->mTitle );
1661
1662                 # Insert broken links
1663                 $brokenLinks = array();
1664                 foreach ( $linksTo as $titleObj ) {
1665                         # Get article ID. Efficient because it was loaded into the cache by getLinksTo().
1666                         $linkID = $titleObj->getArticleID();
1667                         $brokenLinks[] = array( 'bl_from' => $linkID, 'bl_to' => $t );
1668                 }
1669                 $dbw->insert( 'brokenlinks', $brokenLinks, $fname, 'IGNORE' );
1670
1671                 # Delete live links
1672                 $dbw->delete( 'links', array( 'l_to' => $id ) );
1673                 $dbw->delete( 'links', array( 'l_from' => $id ) );
1674                 $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
1675                 $dbw->delete( 'brokenlinks', array( 'bl_from' => $id ) );
1676                 $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
1677
1678                 # Log the deletion
1679                 $log = new LogPage( 'delete' );
1680                 $log->addEntry( 'delete', $this->mTitle, $reason );
1681
1682                 # Clear the cached article id so the interface doesn't act like we exist
1683                 $this->mTitle->resetArticleID( 0 );
1684                 $this->mTitle->mArticleID = 0;
1685                 return true;
1686         }
1687
1688         /**
1689          * Revert a modification
1690          */
1691         function rollback() {
1692                 global $wgUser, $wgOut, $wgRequest;
1693                 $fname = 'Article::rollback';
1694
1695                 if ( ! $wgUser->isAllowed('rollback') ) {
1696                         $wgOut->sysopRequired();
1697                         return;
1698                 }
1699                 if ( wfReadOnly() ) {
1700                         $wgOut->readOnlyPage( $this->getContent( true ) );
1701                         return;
1702                 }
1703                 $dbw =& wfGetDB( DB_MASTER );
1704
1705                 # Enhanced rollback, marks edits rc_bot=1
1706                 $bot = $wgRequest->getBool( 'bot' );
1707
1708                 # Replace all this user's current edits with the next one down
1709                 $tt = $this->mTitle->getDBKey();
1710                 $n = $this->mTitle->getNamespace();
1711
1712                 # Get the last editor, lock table exclusively
1713                 $s = $dbw->selectRow( 'cur',
1714                         array( 'cur_id','cur_user','cur_user_text','cur_comment' ),
1715                         array( 'cur_title' => $tt, 'cur_namespace' => $n ),
1716                         $fname, 'FOR UPDATE'
1717                 );
1718                 if( $s === false ) {
1719                         # Something wrong
1720                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
1721                         return;
1722                 }
1723                 $ut = $dbw->strencode( $s->cur_user_text );
1724                 $uid = $s->cur_user;
1725                 $pid = $s->cur_id;
1726
1727                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
1728                 if( $from != $s->cur_user_text ) {
1729                         $wgOut->setPageTitle(wfmsg('rollbackfailed'));
1730                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
1731                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
1732                                 htmlspecialchars( $from ),
1733                                 htmlspecialchars( $s->cur_user_text ) ) );
1734                         if($s->cur_comment != '') {
1735                                 $wgOut->addHTML(
1736                                         wfMsg('editcomment',
1737                                         htmlspecialchars( $s->cur_comment ) ) );
1738                         }
1739                         return;
1740                 }
1741
1742                 # Get the last edit not by this guy
1743                 $s = $dbw->selectRow( 'old',
1744                         array( 'old_text','old_user','old_user_text','old_timestamp','old_flags' ),
1745                         array(
1746                                 'old_namespace' => $n,
1747                                 'old_title' => $tt,
1748                                 "old_user <> {$uid} OR old_user_text <> '{$ut}'"
1749                         ), $fname, array( 'FOR UPDATE', 'USE INDEX' => 'name_title_timestamp' )
1750                 );
1751                 if( $s === false ) {
1752                         # Something wrong
1753                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
1754                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
1755                         return;
1756                 }
1757
1758                 if ( $bot ) {
1759                         # Mark all reverted edits as bot
1760                         $dbw->update( 'recentchanges',
1761                                 array( /* SET */
1762                                         'rc_bot' => 1
1763                                 ), array( /* WHERE */
1764                                         'rc_user' => $uid,
1765                                         "rc_timestamp > '{$s->old_timestamp}'",
1766                                 ), $fname
1767                         );
1768                 }
1769
1770                 # Save it!
1771                 $newcomment = wfMsg( 'revertpage', $s->old_user_text, $from );
1772                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1773                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1774                 $wgOut->addHTML( '<h2>' . htmlspecialchars( $newcomment ) . "</h2>\n<hr />\n" );
1775                 $this->updateArticle( Revision::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1776                 Article::onArticleEdit( $this->mTitle );
1777                 $wgOut->returnToMain( false );
1778         }
1779
1780
1781         /**
1782          * Do standard deferred updates after page view
1783          * @private
1784          */
1785         function viewUpdates() {
1786                 global $wgDeferredUpdateList;
1787
1788                 if ( 0 != $this->getID() ) {
1789                         global $wgDisableCounters;
1790                         if( !$wgDisableCounters ) {
1791                                 Article::incViewCount( $this->getID() );
1792                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1793                                 array_push( $wgDeferredUpdateList, $u );
1794                         }
1795                 }
1796
1797                 # Update newtalk status if user is reading their own
1798                 # talk page
1799
1800                 global $wgUser;
1801                 if ($this->mTitle->getNamespace() == NS_USER_TALK &&
1802                         $this->mTitle->getText() == $wgUser->getName()) {
1803                         require_once( 'UserTalkUpdate.php' );
1804                         $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(), $this->mTitle->getDBkey(), false, false, false );
1805                 }
1806         }
1807
1808         /**
1809          * Do standard deferred updates after page edit.
1810          * Every 1000th edit, prune the recent changes table.
1811          * @private
1812          * @param string $text
1813          */
1814         function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange) {
1815                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1816                 global $wgMessageCache, $wgUser;
1817
1818                 wfSeedRandom();
1819                 if ( 0 == mt_rand( 0, 999 ) ) {
1820                         # Periodically flush old entries from the recentchanges table.
1821                         global $wgRCMaxAge;
1822                         $dbw =& wfGetDB( DB_MASTER );
1823                         $cutoff = $dbw->timestamp( time() - $wgRCMaxAge );
1824                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1825                         $dbw->query( $sql );
1826                 }
1827                 $id = $this->getID();
1828                 $title = $this->mTitle->getPrefixedDBkey();
1829                 $shortTitle = $this->mTitle->getDBkey();
1830
1831                 $adj = $this->mCountAdjustment;
1832
1833                 if ( 0 != $id ) {
1834                         $u = new LinksUpdate( $id, $title );
1835                         array_push( $wgDeferredUpdateList, $u );
1836                         $u = new SiteStatsUpdate( 0, 1, $adj );
1837                         array_push( $wgDeferredUpdateList, $u );
1838                         $u = new SearchUpdate( $id, $title, $text );
1839                         array_push( $wgDeferredUpdateList, $u );
1840
1841                         # If this is another user's talk page,
1842                         # create a watchlist entry for this page
1843
1844                         if ($this->mTitle->getNamespace() == NS_USER_TALK &&
1845                                 $shortTitle != $wgUser->getName()) {
1846                                 require_once( 'UserTalkUpdate.php' );
1847                                 $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle, $summary, $minoredit, $timestamp_of_pagechange);
1848                         }
1849
1850                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1851                                 $wgMessageCache->replace( $shortTitle, $text );
1852                         }
1853                 }
1854         }
1855
1856         /**
1857          * @todo document this function
1858          * @private
1859          * @param string $oldid         Revision ID of this article revision
1860          */
1861         function setOldSubtitle( $oldid=0 ) {
1862                 global $wgLang, $wgOut, $wgUser;
1863
1864                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1865                 $sk = $wgUser->getSkin();
1866                 $lnk = $sk->makeKnownLinkObj ( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
1867                 $prevlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid );
1868                 $nextlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
1869                 $r = wfMsg( 'revisionasofwithlink', $td, $lnk, $prevlink, $nextlink );
1870                 $wgOut->setSubtitle( $r );
1871         }
1872
1873         /**
1874          * This function is called right before saving the wikitext,
1875          * so we can do things like signatures and links-in-context.
1876          *
1877          * @param string $text
1878          */
1879         function preSaveTransform( $text ) {
1880                 global $wgParser, $wgUser;
1881                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
1882         }
1883
1884         /* Caching functions */
1885
1886         /**
1887          * checkLastModified returns true if it has taken care of all
1888          * output to the client that is necessary for this request.
1889          * (that is, it has sent a cached version of the page)
1890          */
1891         function tryFileCache() {
1892                 static $called = false;
1893                 if( $called ) {
1894                         wfDebug( " tryFileCache() -- called twice!?\n" );
1895                         return;
1896                 }
1897                 $called = true;
1898                 if($this->isFileCacheable()) {
1899                         $touched = $this->mTouched;
1900                         $cache = new CacheManager( $this->mTitle );
1901                         if($cache->isFileCacheGood( $touched )) {
1902                                 global $wgOut;
1903                                 wfDebug( " tryFileCache() - about to load\n" );
1904                                 $cache->loadFromFileCache();
1905                                 return true;
1906                         } else {
1907                                 wfDebug( " tryFileCache() - starting buffer\n" );
1908                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1909                         }
1910                 } else {
1911                         wfDebug( " tryFileCache() - not cacheable\n" );
1912                 }
1913         }
1914
1915         /**
1916          * Check if the page can be cached
1917          * @return bool
1918          */
1919         function isFileCacheable() {
1920                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
1921                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
1922
1923                 return $wgUseFileCache
1924                         and (!$wgShowIPinHeader)
1925                         and ($this->getID() != 0)
1926                         and ($wgUser->getId() == 0)
1927                         and (!$wgUser->getNewtalk())
1928                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
1929                         and (empty( $action ) || $action == 'view')
1930                         and (!isset($oldid))
1931                         and (!isset($diff))
1932                         and (!isset($redirect))
1933                         and (!isset($printable))
1934                         and (!$this->mRedirectedFrom);
1935         }
1936
1937         /**
1938          * Loads cur_touched and returns a value indicating if it should be used
1939          *
1940          */
1941         function checkTouched() {
1942                 $fname = 'Article::checkTouched';
1943                 $id = $this->getID();
1944                 $dbr =& $this->getDB();
1945                 $s = $dbr->selectRow( 'page', array( 'page_touched', 'page_is_redirect' ),
1946                         array( 'page_id' => $id ), $fname, $this->getSelectOptions() );
1947                 if( $s !== false ) {
1948                         $this->mTouched = wfTimestamp( TS_MW, $s->page_touched );
1949                         return !$s->page_is_redirect;
1950                 } else {
1951                         return false;
1952                 }
1953         }
1954
1955         /**
1956          * Edit an article without doing all that other stuff
1957          *
1958          * @param string $text text submitted
1959          * @param string $comment comment submitted
1960          * @param integer $minor whereas it's a minor modification
1961          */
1962         function quickEdit( $text, $comment = '', $minor = 0 ) {
1963                 global $wgUser;
1964                 $fname = 'Article::quickEdit';
1965
1966                 #wfDebugDieBacktrace( "$fname called." );
1967
1968                 wfProfileIn( $fname );
1969
1970                 $dbw =& wfGetDB( DB_MASTER );
1971                 $ns = $this->mTitle->getNamespace();
1972                 $dbkey = $this->mTitle->getDBkey();
1973                 $encDbKey = $dbw->strencode( $dbkey );
1974                 $timestamp = wfTimestampNow();
1975                 # insert new text
1976                 $dbw->insert( 'text', array(
1977                                 'old_text' => $text,
1978                                 'old_flags' => "" ), $fname );
1979                 $text_id = $dbw->insertID();
1980
1981                 # update page
1982                 $dbw->update( 'page', array(
1983                         'page_is_new' => 0,
1984                         'page_touched' => $timestamp,
1985                         'page_is_redirect' => $this->isRedirect( $text ) ? 1 : 0,
1986                         'page_latest' => $text_id ),
1987                         array( 'page_namespace' => $ns, 'page_title' => $dbkey ), $fname );
1988                 # Retrieve page ID
1989                 $page_id = $dbw->selectField( 'page', 'page_id', array( 'page_namespace' => $ns, 'page_title' => $dbkey ), $fname );
1990
1991                 # update revision
1992                 $dbw->insert( 'revision', array(
1993                         'rev_id' => $text_id,
1994                         'rev_page' => $page_id,
1995                         'rev_comment' => $comment,
1996                         'rev_user' => $wgUser->getID(),
1997                         'rev_user_text' => $wgUser->getName(),
1998                         'rev_timestamp' => $timestamp,
1999                         'inverse_timestamp' => wfInvertTimestamp( $timestamp ),
2000                         'rev_minor_edit' => intval($minor) ),
2001                         $fname );
2002 /*
2003                 # Save to history
2004                 $dbw->insertSelect( 'old', 'cur',
2005                         array(
2006                                 'old_namespace' => 'cur_namespace',
2007                                 'old_title' => 'cur_title',
2008                                 'old_text' => 'cur_text',
2009                                 'old_comment' => 'cur_comment',
2010                                 'old_user' => 'cur_user',
2011                                 'old_user_text' => 'cur_user_text',
2012                                 'old_timestamp' => 'cur_timestamp',
2013                                 'inverse_timestamp' => '99999999999999-cur_timestamp',
2014                         ), array(
2015                                 'cur_namespace' => $ns,
2016                                 'cur_title' => $dbkey,
2017                         ), $fname
2018                 );
2019
2020                 # Use the affected row count to determine if the article is new
2021                 $numRows = $dbw->affectedRows();
2022
2023                 # Make an array of fields to be inserted
2024                 $fields = array(
2025                         'cur_text' => $text,
2026                         'cur_timestamp' => $timestamp,
2027                         'cur_user' => $wgUser->getID(),
2028                         'cur_user_text' => $wgUser->getName(),
2029                         'inverse_timestamp' => wfInvertTimestamp( $timestamp ),
2030                         'cur_comment' => $comment,
2031                         'cur_is_redirect' => $this->isRedirect( $text ) ? 1 : 0,
2032                         'cur_minor_edit' => intval($minor),
2033                         'cur_touched' => $dbw->timestamp($timestamp),
2034                 );
2035
2036                 if ( $numRows ) {
2037                         # Update article
2038                         $fields['cur_is_new'] = 0;
2039                         $dbw->update( 'cur', $fields, array( 'cur_namespace' => $ns, 'cur_title' => $dbkey ), $fname );
2040                 } else {
2041                         # Insert new article
2042                         $fields['cur_is_new'] = 1;
2043                         $fields['cur_namespace'] = $ns;
2044                         $fields['cur_title'] = $dbkey;
2045                         $fields['cur_random'] = $rand = wfRandom();
2046                         $dbw->insert( 'cur', $fields, $fname );
2047                 }
2048 */
2049                 wfProfileOut( $fname );
2050         }
2051
2052         /**
2053          * Used to increment the view counter
2054          *
2055          * @static
2056          * @param integer $id article id
2057          */
2058         function incViewCount( $id ) {
2059                 $id = intval( $id );
2060                 global $wgHitcounterUpdateFreq;
2061
2062                 $dbw =& wfGetDB( DB_MASTER );
2063                 $pageTable = $dbw->tableName( 'page' );
2064                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
2065                 $acchitsTable = $dbw->tableName( 'acchits' );
2066
2067                 if( $wgHitcounterUpdateFreq <= 1 ){ //
2068                         $dbw->query( "UPDATE $pageTable SET page_counter = page_counter + 1 WHERE page_id = $id" );
2069                         return;
2070                 }
2071
2072                 # Not important enough to warrant an error page in case of failure
2073                 $oldignore = $dbw->ignoreErrors( true );
2074
2075                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2076
2077                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2078                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2079                         # Most of the time (or on SQL errors), skip row count check
2080                         $dbw->ignoreErrors( $oldignore );
2081                         return;
2082                 }
2083
2084                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2085                 $row = $dbw->fetchObject( $res );
2086                 $rown = intval( $row->n );
2087                 if( $rown >= $wgHitcounterUpdateFreq ){
2088                         wfProfileIn( 'Article::incViewCount-collect' );
2089                         $old_user_abort = ignore_user_abort( true );
2090
2091                         $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2092                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable TYPE=HEAP ".
2093                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2094                                 'GROUP BY hc_id');
2095                         $dbw->query("DELETE FROM $hitcounterTable");
2096                         $dbw->query('UNLOCK TABLES');
2097                         $dbw->query("UPDATE $curTable,$acchitsTable SET cur_counter=cur_counter + hc_n ".
2098                                 'WHERE cur_id = hc_id');
2099                         $dbw->query("DROP TABLE $acchitsTable");
2100
2101                         ignore_user_abort( $old_user_abort );
2102                         wfProfileOut( 'Article::incViewCount-collect' );
2103                 }
2104                 $dbw->ignoreErrors( $oldignore );
2105         }
2106
2107         /**#@+
2108          * The onArticle*() functions are supposed to be a kind of hooks
2109          * which should be called whenever any of the specified actions
2110          * are done.
2111          *
2112          * This is a good place to put code to clear caches, for instance.
2113          *
2114          * This is called on page move and undelete, as well as edit
2115          * @static
2116          * @param $title_obj a title object
2117          */
2118
2119         function onArticleCreate($title_obj) {
2120                 global $wgUseSquid, $wgDeferredUpdateList;
2121
2122                 $titles = $title_obj->getBrokenLinksTo();
2123
2124                 # Purge squid
2125                 if ( $wgUseSquid ) {
2126                         $urls = $title_obj->getSquidURLs();
2127                         foreach ( $titles as $linkTitle ) {
2128                                 $urls[] = $linkTitle->getInternalURL();
2129                         }
2130                         $u = new SquidUpdate( $urls );
2131                         array_push( $wgDeferredUpdateList, $u );
2132                 }
2133
2134                 # Clear persistent link cache
2135                 LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
2136         }
2137
2138         function onArticleDelete($title_obj) {
2139                 LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
2140         }
2141         function onArticleEdit($title_obj) {
2142                 LinkCache::linksccClearPage( $title_obj->getArticleID() );
2143         }
2144         /**#@-*/
2145
2146         /**
2147          * Info about this page
2148          */
2149         function info() {
2150                 global $wgUser, $wgTitle, $wgOut, $wgAllowPageInfo;
2151                 $fname = 'Article::info';
2152
2153                 if ( !$wgAllowPageInfo ) {
2154                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
2155                         return;
2156                 }
2157
2158                 $dbr =& $this->getDB();
2159
2160                 $basenamespace = $wgTitle->getNamespace() & (~1);
2161                 $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace );
2162                 $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace );
2163                 $wl_clause  = array( 'wl_title' => $wgTitle->getDBkey(), 'wl_namespace' => $basenamespace );
2164                 $fullTitle = $wgTitle->makeName($basenamespace, $wgTitle->getDBKey());
2165                 $wgOut->setPagetitle(  $fullTitle );
2166                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
2167
2168                 # first, see if the page exists at all.
2169                 $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2170                 if ($exists < 1) {
2171                         $wgOut->addHTML( wfMsg('noarticletext') );
2172                 } else {
2173                         $numwatchers = $dbr->selectField( 'watchlist', 'COUNT(*)', $wl_clause, $fname,
2174                                 $this->getSelectOptions() );
2175                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $numwatchers) . '</li>' );
2176                         $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2177                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $old + 1) . '</li>');
2178
2179                         # to find number of distinct authors, we need to do some
2180                         # funny stuff because of the cur/old table split:
2181                         # - first, find the name of the 'cur' author
2182                         # - then, find the number of *other* authors in 'old'
2183
2184                         # find 'cur' author
2185                         $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2186                                 $this->getSelectOptions() );
2187
2188                         # find number of 'old' authors excluding 'cur' author
2189                         $authors = $dbr->selectField( 'old', 'COUNT(DISTINCT old_user_text)',
2190                                 $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ), $fname,
2191                                 $this->getSelectOptions() ) + 1;
2192
2193                         # now for the Talk page ...
2194                         $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace+1 );
2195                         $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace+1 );
2196
2197                         # does it exist?
2198                         $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2199
2200                         # number of edits
2201                         if ($exists > 0) {
2202                                 $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2203                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $old + 1) . '</li>');
2204                         }
2205                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $authors) . '</li>' );
2206
2207                         # number of authors
2208                         if ($exists > 0) {
2209                                 $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2210                                         $this->getSelectOptions() );
2211                                 $authors = $dbr->selectField( 'cur', 'COUNT(DISTINCT old_user_text)',
2212                                         $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ),
2213                                         $fname, $this->getSelectOptions() );
2214
2215                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $authors) . '</li></ul>' );
2216                         }
2217                 }
2218         }
2219 }
2220
2221 /**
2222  * Check whether an article is a stub
2223  *
2224  * @public
2225  * @param integer $articleID    ID of the article that is to be checked
2226  */
2227 function wfArticleIsStub( $articleID ) {
2228         global $wgUser;
2229         $fname = 'wfArticleIsStub';
2230
2231         $threshold = $wgUser->getOption('stubthreshold') ;
2232         if ( $threshold > 0 ) {
2233                 $dbr =& wfGetDB( DB_SLAVE );
2234                 $s = $dbr->selectRow( array('page', 'text'),
2235                         array( 'LENGTH(old_text) AS len', 'page_namespace', 'page_is_redirect' ),
2236                         array( 'page_id' => $articleID, "page.page_latest=text.old_id" ),
2237                         $fname ) ;
2238                 if ( $s == false OR $s->page_is_redirect OR $s->page_namespace != NS_MAIN ) {
2239                         return false;
2240                 }
2241                 $size = $s->len;
2242                 return ( $size < $threshold );
2243         }
2244         return false;
2245 }
2246
2247 ?>