includes/Article.php

   1 <?php
   2 /**
   3  * File for articles
   4  * @package MediaWiki
   5  */
   6
   7 /**
   8  * Need the CacheManager to be loaded
   9  */
  10 require_once( 'CacheManager.php' );
  11 require_once( 'Revision.php' );
  12
  13 $wgArticleCurContentFields = false;
  14 $wgArticleOldContentFields = false;
  15
  16 /**
  17  * Class representing a Wikipedia article and history.
  18  *
  19  * See design.doc for an overview.
  20  * Note: edit user interface and cache support functions have been
  21  * moved to separate EditPage and CacheManager classes.
  22  *
  23  * @package MediaWiki
  24  */
  25 class Article {
  26         /**#@+
  27          * @access private
  28          */
  29         var $mContent, $mContentLoaded;
  30         var $mUser, $mTimestamp, $mUserText;
  31         var $mCounter, $mComment, $mCountAdjustment;
  32         var $mMinorEdit, $mRedirectedFrom;
  33         var $mTouched, $mFileCache, $mTitle;
  34         var $mId, $mTable;
  35         var $mForUpdate;
  36         var $mOldId;
  37         /**#@-*/
  38
  39         /**
  40          * Constructor and clear the article
  41          * @param mixed &$title
  42          */
  43         function Article( &$title ) {
  44                 $this->mTitle =& $title;
  45                 $this->clear();
  46         }
  47
  48         /**
  49          * get the title object of the article
  50          * @public
  51          */
  52         function getTitle() {
  53                 return $this->mTitle;
  54         }
  55
  56         /**
  57           * Clear the object
  58           * @private
  59           */
  60         function clear() {
  61                 $this->mContentLoaded = false;
  62                 $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
  63                 $this->mRedirectedFrom = $this->mUserText =
  64                 $this->mTimestamp = $this->mComment = $this->mFileCache = '';
  65                 $this->mCountAdjustment = 0;
  66                 $this->mTouched = '19700101000000';
  67                 $this->mForUpdate = false;
  68         }
  69
  70         /**
  71          * Note that getContent/loadContent may follow redirects if
  72          * not told otherwise, and so may cause a change to mTitle.
  73          *
  74          * @param $noredir
  75          * @return Return the text of this revision
  76         */
  77         function getContent( $noredir ) {
  78                 global $wgRequest;
  79
  80                 # Get variables from query string :P
  81                 $action = $wgRequest->getText( 'action', 'view' );
  82                 $section = $wgRequest->getText( 'section' );
  83
  84                 $fname =  'Article::getContent';
  85                 wfProfileIn( $fname );
  86
  87                 if ( 0 == $this->getID() ) {
  88                         if ( 'edit' == $action ) {
  89                                 wfProfileOut( $fname );
  90                                 return ''; # was "newarticletext", now moved above the box)
  91                         }
  92                         wfProfileOut( $fname );
  93                         return wfMsg( 'noarticletext' );
  94                 } else {
  95                         $this->loadContent( $noredir );
  96                         # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
  97                         if ( $this->mTitle->getNamespace() == NS_USER_TALK &&
  98                           preg_match('/^\d{1,3}\.\d{1,3}.\d{1,3}\.\d{1,3}$/',$this->mTitle->getText()) &&
  99                           $action=='view'
 100                         ) {
 101                                 wfProfileOut( $fname );
 102                                 return $this->mContent . "\n" .wfMsg('anontalkpagetext');
 103                         } else {
 104                                 if($action=='edit') {
 105                                         if($section!='') {
 106                                                 if($section=='new') {
 107                                                         wfProfileOut( $fname );
 108                                                         return '';
 109                                                 }
 110
 111                                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 112                                                 # comments to be stripped as well)
 113                                                 $rv=$this->getSection($this->mContent,$section);
 114                                                 wfProfileOut( $fname );
 115                                                 return $rv;
 116                                         }
 117                                 }
 118                                 wfProfileOut( $fname );
 119                                 return $this->mContent;
 120                         }
 121                 }
 122         }
 123
 124         /**
 125          * This function returns the text of a section, specified by a number ($section).
 126          * A section is text under a heading like == Heading == or <h1>Heading</h1>, or
 127          * the first section before any such heading (section 0).
 128          *
 129          * If a section contains subsections, these are also returned.
 130          *
 131          * @param string $text text to look in
 132          * @param integer $section section number
 133          * @return string text of the requested section
 134          */
 135         function getSection($text,$section) {
 136
 137                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 138                 # comments to be stripped as well)
 139                 $striparray=array();
 140                 $parser=new Parser();
 141                 $parser->mOutputType=OT_WIKI;
 142                 $striptext=$parser->strip($text, $striparray, true);
 143
 144                 # now that we can be sure that no pseudo-sections are in the source,
 145                 # split it up by section
 146                 $secs =
 147                   preg_split(
 148                   '/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 149                   $striptext, -1,
 150                   PREG_SPLIT_DELIM_CAPTURE);
 151                 if($section==0) {
 152                         $rv=$secs[0];
 153                 } else {
 154                         $headline=$secs[$section*2-1];
 155                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 156                         $hlevel=$matches[1];
 157
 158                         # translate wiki heading into level
 159                         if(strpos($hlevel,'=')!==false) {
 160                                 $hlevel=strlen($hlevel);
 161                         }
 162
 163                         $rv=$headline. $secs[$section*2];
 164                         $count=$section+1;
 165
 166                         $break=false;
 167                         while(!empty($secs[$count*2-1]) && !$break) {
 168
 169                                 $subheadline=$secs[$count*2-1];
 170                                 preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 171                                 $subhlevel=$matches[1];
 172                                 if(strpos($subhlevel,'=')!==false) {
 173                                         $subhlevel=strlen($subhlevel);
 174                                 }
 175                                 if($subhlevel > $hlevel) {
 176                                         $rv.=$subheadline.$secs[$count*2];
 177                                 }
 178                                 if($subhlevel <= $hlevel) {
 179                                         $break=true;
 180                                 }
 181                                 $count++;
 182
 183                         }
 184                 }
 185                 # reinsert stripped tags
 186                 $rv=$parser->unstrip($rv,$striparray);
 187                 $rv=$parser->unstripNoWiki($rv,$striparray);
 188                 $rv=trim($rv);
 189                 return $rv;
 190
 191         }
 192
 193         /**
 194          * Return an array of the columns of the "cur"-table
 195          */
 196         function getContentFields() {
 197                 return $wgArticleContentFields = array(
 198                   'old_text','old_flags',
 199                   'rev_timestamp','rev_user', 'rev_user_text', 'rev_comment','page_counter',
 200                   'page_namespace', 'page_title', 'page_restrictions','page_touched','page_is_redirect' );
 201         }
 202
 203         /**
 204          * Return the oldid of the article that is to be shown.
 205          * For requests with a "direction", this is not the oldid of the
 206          * query
 207          */
 208         function getOldID() {
 209                 global $wgRequest, $wgOut;
 210                 static $lastid;
 211
 212                 if ( isset( $lastid ) ) {
 213                         return $lastid;
 214                 }
 215                 # Query variables :P
 216                 $oldid = $wgRequest->getVal( 'oldid' );
 217                 if ( isset( $oldid ) ) {
 218                         $dbr =& $this->getDB();
 219                         $oldid = IntVal( $oldid );
 220                         if ( $wgRequest->getVal( 'direction' ) == 'next' ) {
 221                                 $nextid = $this->mTitle->getNextRevisionID( $oldid );
 222                                 if ( $nextid  ) {
 223                                         $oldid = $nextid;
 224                                 } else {
 225                                         $wgOut->redirect( $this->mTitle->getFullURL( 'redirect=no' ) );
 226                                 }
 227                         } elseif ( $wgRequest->getVal( 'direction' ) == 'prev' ) {
 228                                 $previd = $this->mTitle->getPreviousRevisionID( $oldid );
 229                                 if ( $previd ) {
 230                                         $oldid = $previd;
 231                                 } else {
 232                                         # TODO
 233                                 }
 234                         }
 235                         $lastid = $oldid;
 236                 }
 237                 return @$oldid; # "@" to be able to return "unset" without PHP complaining
 238         }
 239
 240
 241         /**
 242          * Load the revision (including cur_text) into this object
 243          */
 244         function loadContent( $noredir = false ) {
 245                 global $wgOut, $wgRequest;
 246
 247                 if ( $this->mContentLoaded ) return;
 248
 249                 $dbr =& $this->getDB();
 250                 # Query variables :P
 251                 $oldid = $this->getOldID();
 252                 $redirect = $wgRequest->getVal( 'redirect' );
 253
 254                 $fname = 'Article::loadContent';
 255
 256                 # Pre-fill content with error message so that if something
 257                 # fails we'll have something telling us what we intended.
 258
 259                 $t = $this->mTitle->getPrefixedText();
 260
 261                 $noredir = $noredir || ($wgRequest->getVal( 'redirect' ) == 'no');
 262                 $this->mOldId = $oldid;
 263                 $this->fetchContent( $oldid, $noredir, true );
 264         }
 265
 266         /**
 267          * @param int $oldid 0 for whatever the latest revision is
 268          * @param bool $noredir Set to true to avoid following redirects
 269          * @param bool $globalTitle Set to true to change the global $wgTitle object when following redirects or other unexpected title changes
 270          * @return string
 271          */
 272         function fetchContent( $oldid = 0, $noredir = false, $globalTitle = false ) {
 273                 if ( $this->mContentLoaded ) {
 274                         return $this->mContent;
 275                 }
 276                 $dbr =& $this->getDB();
 277                 $fname = 'Article::fetchContent';
 278
 279                 # Pre-fill content with error message so that if something
 280                 # fails we'll have something telling us what we intended.
 281                 $t = $this->mTitle->getPrefixedText();
 282                 if( $oldid ) {
 283                         $t .= ',oldid='.$oldid;
 284                 }
 285                 if( isset( $redirect ) ) {
 286                         $redirect = ($redirect == 'no') ? 'no' : 'yes';
 287                         $t .= ',redirect='.$redirect;
 288                 }
 289                 $this->mContent = wfMsg( 'missingarticle', $t );
 290
 291                 if( !$oldid ) {
 292                         # Retrieve current version
 293                         $id = $this->getID();
 294                         if ( 0 == $id ) {
 295                                 return false;
 296                         }
 297
 298                         $s = $dbr->selectRow( array( 'text', 'revision', 'page' ),
 299                                 $this->getContentFields(),
 300                                 "page_id='$id' AND rev_page=page_id AND rev_id=page_latest AND old_id=rev_id",
 301                                 $fname, $this->getSelectOptions() );
 302                 } else {
 303                         # Historical revision
 304                         $s = $dbr->selectRow( array( 'text', 'revision', 'page' ),
 305                                 $this->getContentFields(),
 306                                 "rev_page=page_id AND rev_id='$oldid' AND old_id=rev_id",
 307                                 $fname, $this->getSelectOptions() );
 308                 }
 309                 if ( $s === false ) {
 310                         return false;
 311                 }
 312
 313                 # If we got a redirect, follow it (unless we've been told
 314                 # not to by either the function parameter or the query
 315                 if ( !$oldid && !$noredir ) {
 316                         $rt = Title::newFromRedirect( Revision::getRevisionText( $s ) );
 317                         # process if title object is valid and not special:userlogout
 318                         if ( $rt && ! ( $rt->getNamespace() == NS_SPECIAL && $rt->getText() == 'Userlogout' ) ) {
 319                                 # Gotta hand redirects to special pages differently:
 320                                 # Fill the HTTP response "Location" header and ignore
 321                                 # the rest of the page we're on.
 322                                 if( $globalTitle ) {
 323                                         global $wgOut;
 324                                         if ( $rt->getInterwiki() != '' ) {
 325                                                 $wgOut->redirect( $rt->getFullURL() ) ;
 326                                                 return false;
 327                                         }
 328                                         if ( $rt->getNamespace() == NS_SPECIAL ) {
 329                                                 $wgOut->redirect( $rt->getFullURL() );
 330                                                 return false;
 331                                         }
 332                                 }
 333                                 $rid = $rt->getArticleID();
 334                                 if ( 0 != $rid ) {
 335                                         $redirRow = $dbr->selectRow( array( 'text', 'revision', 'page' ),
 336                                                 $this->getContentFields(),
 337                                                 "page_id='$rid' AND rev_page=page_id AND rev_id=page_latest AND old_id=rev_id",
 338                                                 $fname, $this->getSelectOptions() );
 339
 340                                         if ( $redirRow !== false ) {
 341                                                 $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 342                                                 $this->mTitle = $rt;
 343                                                 $s = $redirRow;
 344                                         }
 345                                 }
 346                         }
 347                 }
 348
 349                 # if the title's different from expected, update...
 350                 if( $globalTitle &&
 351                         ( $this->mTitle->getNamespace() != $s->page_namespace ||
 352                         $this->mTitle->getDBkey() != $s->page_title ) ) {
 353                         $oldTitle = Title::makeTitle( $s->page_namesapce, $s->page_title );
 354                         $this->mTitle = $oldTitle;
 355                         global $wgTitle;
 356                         $wgTitle = $oldTitle;
 357                 }
 358
 359                 # Back to the business at hand...
 360                 $this->mCounter = $s->page_counter;
 361                 $this->mTitle->mRestrictions = explode( ',', trim( $s->page_restrictions ) );
 362                 $this->mTitle->mRestrictionsLoaded = true;
 363                 $this->mTouched = wfTimestamp( TS_MW, $s->page_touched );
 364
 365                 $this->mContent = Revision::getRevisionText( $s );
 366
 367                 $this->mUser = $s->rev_user;
 368                 $this->mUserText = $s->rev_user_text;
 369                 $this->mComment = $s->rev_comment;
 370                 $this->mTimestamp = wfTimestamp( TS_MW, $s->rev_timestamp );
 371
 372                 $this->mContentLoaded = true;
 373                 return $this->mContent;
 374         }
 375
 376         /**
 377          * Gets the article text without using so many damn globals
 378          * Returns false on error
 379          *
 380          * @param integer $oldid
 381          */
 382         function getContentWithoutUsingSoManyDamnGlobals( $oldid = 0, $noredir = false ) {
 383                 return $this->fetchContent( $oldid, $noredir, false );
 384         }
 385
 386         /**
 387          * Read/write accessor to select FOR UPDATE
 388          */
 389         function forUpdate( $x = NULL ) {
 390                 return wfSetVar( $this->mForUpdate, $x );
 391         }
 392
 393         /**
 394          * Get the database which should be used for reads
 395          */
 396         function &getDB() {
 397                 if ( $this->mForUpdate ) {
 398                         return wfGetDB( DB_MASTER );
 399                 } else {
 400                         return wfGetDB( DB_SLAVE );
 401                 }
 402         }
 403
 404         /**
 405          * Get options for all SELECT statements
 406          * Can pass an option array, to which the class-wide options will be appended
 407          */
 408         function getSelectOptions( $options = '' ) {
 409                 if ( $this->mForUpdate ) {
 410                         if ( is_array( $options ) ) {
 411                                 $options[] = 'FOR UPDATE';
 412                         } else {
 413                                 $options = 'FOR UPDATE';
 414                         }
 415                 }
 416                 return $options;
 417         }
 418
 419         /**
 420          * Return the Article ID
 421          */
 422         function getID() {
 423                 if( $this->mTitle ) {
 424                         return $this->mTitle->getArticleID();
 425                 } else {
 426                         return 0;
 427                 }
 428         }
 429
 430         /**
 431          * Get the view count for this article
 432          */
 433         function getCount() {
 434                 if ( -1 == $this->mCounter ) {
 435                         $id = $this->getID();
 436                         $dbr =& $this->getDB();
 437                         $this->mCounter = $dbr->selectField( 'page', 'page_counter', array( 'page_id' => $id ),
 438                                 'Article::getCount', $this->getSelectOptions() );
 439                 }
 440                 return $this->mCounter;
 441         }
 442
 443         /**
 444          * Would the given text make this article a "good" article (i.e.,
 445          * suitable for including in the article count)?
 446          */
 447         function isCountable( $text ) {
 448                 global $wgUseCommaCount;
 449
 450                 if ( 0 != $this->mTitle->getNamespace() ) { return 0; }
 451                 if ( $this->isRedirect( $text ) ) { return 0; }
 452                 $token = ($wgUseCommaCount ? ',' : '[[' );
 453                 if ( false === strstr( $text, $token ) ) { return 0; }
 454                 return 1;
 455         }
 456
 457         /**
 458          * Tests if the article text represents a redirect
 459          */
 460         function isRedirect( $text = false ) {
 461                 if ( $text === false ) {
 462                         $this->loadContent();
 463                         $titleObj = Title::newFromRedirect( $this->mText );
 464                 } else {
 465                         $titleObj = Title::newFromRedirect( $text );
 466                 }
 467                 return $titleObj !== NULL;
 468         }
 469
 470         /**
 471          * Loads everything except the text
 472          * This isn't necessary for all uses, so it's only done if needed.
 473          * @private
 474          */
 475         function loadLastEdit() {
 476                 global $wgOut;
 477
 478                 if ( -1 != $this->mUser )
 479                         return;
 480
 481                 $fname = 'Article::loadLastEdit';
 482
 483                 $dbr =& $this->getDB();
 484                 $s = $dbr->selectRow( array( 'revision', 'page') ,
 485                   array( 'rev_user','rev_user_text','rev_timestamp', 'rev_comment','rev_minor_edit' ),
 486                   array( 'page_id' => $this->getID(), 'page_latest=rev_id' ), $fname, $this->getSelectOptions() );
 487
 488                 if ( $s !== false ) {
 489                         $this->mUser = $s->rev_user;
 490                         $this->mUserText = $s->rev_user_text;
 491                         $this->mTimestamp = wfTimestamp(TS_MW,$s->rev_timestamp);
 492                         $this->mComment = $s->rev_comment;
 493                         $this->mMinorEdit = $s->rev_minor_edit;
 494                 }
 495         }
 496
 497         function getTimestamp() {
 498                 $this->loadLastEdit();
 499                 return $this->mTimestamp;
 500         }
 501
 502         function getUser() {
 503                 $this->loadLastEdit();
 504                 return $this->mUser;
 505         }
 506
 507         function getUserText() {
 508                 $this->loadLastEdit();
 509                 return $this->mUserText;
 510         }
 511
 512         function getComment() {
 513                 $this->loadLastEdit();
 514                 return $this->mComment;
 515         }
 516
 517         function getMinorEdit() {
 518                 $this->loadLastEdit();
 519                 return $this->mMinorEdit;
 520         }
 521
 522         function getContributors($limit = 0, $offset = 0) {
 523                 $fname = 'Article::getContributors';
 524
 525                 # XXX: this is expensive; cache this info somewhere.
 526
 527                 $title = $this->mTitle;
 528                 $contribs = array();
 529                 $dbr =& $this->getDB();
 530                 $revTable = $dbr->tableName( 'revision' );
 531                 $userTable = $dbr->tableName( 'user' );
 532                 $encDBkey = $dbr->addQuotes( $title->getDBkey() );
 533                 $ns = $title->getNamespace();
 534                 $user = $this->getUser();
 535                 $pageId = $this->getId();
 536
 537                 $sql = "SELECT rev_user, rev_user_text, user_real_name, MAX(rev_timestamp) as timestamp
 538                         FROM $revTable LEFT JOIN $userTable ON rev_user = user_id
 539                         WHERE rev_page = $pageId
 540                         AND rev_user != $user
 541                         GROUP BY rev_user, rev_user_text, user_real_name
 542                         ORDER BY timestamp DESC";
 543
 544                 if ($limit > 0) { $sql .= ' LIMIT '.$limit; }
 545                 $sql .= ' '. $this->getSelectOptions();
 546
 547                 $res = $dbr->query($sql, $fname);
 548
 549                 while ( $line = $dbr->fetchObject( $res ) ) {
 550                         $contribs[] = array($line->rev_user, $line->rev_user_text, $line->user_real_name);
 551                 }
 552
 553                 $dbr->freeResult($res);
 554                 return $contribs;
 555         }
 556
 557         /**
 558          * This is the default action of the script: just view the page of
 559          * the given title.
 560         */
 561         function view() {
 562                 global $wgUser, $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgLang;
 563                 global $wgLinkCache, $IP, $wgEnableParserCache, $wgStylePath, $wgUseRCPatrol;
 564                 global $wgEnotif;
 565                 $sk = $wgUser->getSkin();
 566
 567                 $fname = 'Article::view';
 568                 wfProfileIn( $fname );
 569                 # Get variables from query string
 570                 $oldid = $this->getOldID();
 571                 $diff = $wgRequest->getVal( 'diff' );
 572                 $rcid = $wgRequest->getVal( 'rcid' );
 573
 574                 $wgOut->setArticleFlag( true );
 575                 $wgOut->setRobotpolicy( 'index,follow' );
 576                 # If we got diff and oldid in the query, we want to see a
 577                 # diff page instead of the article.
 578
 579                 if ( !is_null( $diff ) ) {
 580                         require_once( 'DifferenceEngine.php' );
 581                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 582                         $de = new DifferenceEngine( $oldid, $diff, $rcid );
 583                         $de->showDiffPage();
 584                         if( $diff == 0 ) {
 585                                 # Run view updates for current revision only
 586                                 $this->viewUpdates();
 587                         }
 588                         wfProfileOut( $fname );
 589                         return;
 590                 }
 591                 if ( empty( $oldid ) && $this->checkTouched() ) {
 592                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 593                                 wfProfileOut( $fname );
 594                                 return;
 595                         } else if ( $this->tryFileCache() ) {
 596                                 # tell wgOut that output is taken care of
 597                                 $wgOut->disable();
 598                                 $this->viewUpdates();
 599                                 wfProfileOut( $fname );
 600                                 return;
 601                         }
 602                 }
 603                 # Should the parser cache be used?
 604                 if ( $wgEnableParserCache && intval($wgUser->getOption( 'stubthreshold' )) == 0 && empty( $oldid ) ) {
 605                         $pcache = true;
 606                 } else {
 607                         $pcache = false;
 608                 }
 609
 610                 $outputDone = false;
 611                 if ( $pcache ) {
 612                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 613                                 $outputDone = true;
 614                         }
 615                 }
 616                 if ( !$outputDone ) {
 617                         $text = $this->getContent( false ); # May change mTitle by following a redirect
 618
 619                         # Another whitelist check in case oldid or redirects are altering the title
 620                         if ( !$this->mTitle->userCanRead() ) {
 621                                 $wgOut->loginToUse();
 622                                 $wgOut->output();
 623                                 exit;
 624                         }
 625
 626
 627                         # We're looking at an old revision
 628
 629                         if ( !empty( $oldid ) ) {
 630                                 $this->setOldSubtitle( isset($this->mOldId) ? $this->mOldId : $oldid );
 631                                 $wgOut->setRobotpolicy( 'noindex,follow' );
 632                         }
 633                         if ( '' != $this->mRedirectedFrom ) {
 634                                 $sk = $wgUser->getSkin();
 635                                 $redir = $sk->makeKnownLink( $this->mRedirectedFrom, '',
 636                                   'redirect=no' );
 637                                 $s = wfMsg( 'redirectedfrom', $redir );
 638                                 $wgOut->setSubtitle( $s );
 639
 640                                 # Can't cache redirects
 641                                 $pcache = false;
 642                         }
 643
 644                         # wrap user css and user js in pre and don't parse
 645                         # XXX: use $this->mTitle->usCssJsSubpage() when php is fixed/ a workaround is found
 646                         if (
 647                                 $this->mTitle->getNamespace() == NS_USER &&
 648                                 preg_match('/\\/[\\w]+\\.(css|js)$/', $this->mTitle->getDBkey())
 649                         ) {
 650                                 $wgOut->addWikiText( wfMsg('clearyourcache'));
 651                                 $wgOut->addHTML( '<pre>'.htmlspecialchars($this->mContent)."\n</pre>" );
 652                         } else if ( $rt = Title::newFromRedirect( $text ) ) {
 653                                 # Display redirect
 654                                 $imageUrl = $wgStylePath.'/common/images/redirect.png';
 655                                 $targetUrl = $rt->escapeLocalURL();
 656                                 $titleText = htmlspecialchars( $rt->getPrefixedText() );
 657                                 $link = $sk->makeLinkObj( $rt );
 658
 659                                 $wgOut->addHTML( '<img valign="center" src="'.$imageUrl.'" alt="#REDIRECT" />' .
 660                                   '<span class="redirectText">'.$link.'</span>' );
 661
 662                         } else if ( $pcache ) {
 663                                 # Display content and save to parser cache
 664                                 $wgOut->addPrimaryWikiText( $text, $this );
 665                         } else {
 666                                 # Display content, don't attempt to save to parser cache
 667                                 $wgOut->addWikiText( $text );
 668                         }
 669                 }
 670                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 671                 # If we have been passed an &rcid= parameter, we want to give the user a
 672                 # chance to mark this new article as patrolled.
 673                 if ( $wgUseRCPatrol && !is_null ( $rcid ) && $rcid != 0 && $wgUser->getID() != 0 &&
 674                      ( $wgUser->isAllowed('patrol') || !$wgOnlySysopsCanPatrol ) )
 675                 {
 676                         $wgOut->addHTML( wfMsg ( 'markaspatrolledlink',
 677                                 $sk->makeKnownLinkObj ( $this->mTitle, wfMsg ( 'markaspatrolledtext' ),
 678                                         'action=markpatrolled&rcid='.$rcid )
 679                          ) );
 680                 }
 681
 682                 # Put link titles into the link cache
 683                 $wgOut->transformBuffer();
 684
 685                 # Add link titles as META keywords
 686                 $wgOut->addMetaTags() ;
 687
 688                 $this->viewUpdates();
 689                 wfProfileOut( $fname );
 690
 691                 $wgUser->clearNotification( $this->mTitle );
 692         }
 693
 694         /**
 695          * Theoretically we could defer these whole insert and update
 696          * functions for after display, but that's taking a big leap
 697          * of faith, and we want to be able to report database
 698          * errors at some point.
 699          * @private
 700          */
 701         function insertNewArticle( $text, $summary, $isminor, $watchthis ) {
 702                 global $wgOut, $wgUser;
 703                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 704
 705                 $fname = 'Article::insertNewArticle';
 706
 707                 $this->mCountAdjustment = $this->isCountable( $text );
 708
 709                 $ns = $this->mTitle->getNamespace();
 710                 $ttl = $this->mTitle->getDBkey();
 711                 $text = $this->preSaveTransform( $text );
 712                 if ( $this->isRedirect( $text ) ) { $redir = 1; }
 713                 else { $redir = 0; }
 714
 715                 $now = wfTimestampNow();
 716                 $won = wfInvertTimestamp( $now );
 717                 wfSeedRandom();
 718                 $rand = wfRandom();
 719                 $isminor = ( $isminor && $wgUser->getID() ) ? 1 : 0;
 720
 721                 $mungedText = $text;
 722                 $flags = Revision::compressRevisionText( $mungedText );
 723
 724                 $dbw =& wfGetDB( DB_MASTER );
 725
 726                 $old_id = $dbw->nextSequenceValue( 'text_old_id_seq' );
 727                 $dbw->insert( 'text', array(
 728                         'old_id' => $old_id,
 729                         'old_text' => $mungedText,
 730                         'old_flags' => $flags,
 731                 ), $fname );
 732                 $revisionId = $dbw->insertId();
 733
 734                 $page_id = $dbw->nextSequenceValue( 'page_page_id_seq' );
 735                 $dbw->insert( 'page', array(
 736                         'page_id' => $page_id,
 737                         'page_namespace' => $ns,
 738                         'page_title' => $ttl,
 739                         'page_counter' => 0,
 740                         'page_restrictions' => '',
 741                         'page_is_redirect' => $redir,
 742                         'page_is_new' => 1,
 743                         'page_random' => $rand,
 744                         'page_touched' => $dbw->timestamp($now),
 745                         'page_latest' => $revisionId,
 746                 ), $fname );
 747                 $newid = $dbw->insertId();
 748
 749                 $dbw->insert( 'revision', array(
 750                         'rev_page' => $newid,
 751                         'rev_id' => $revisionId,
 752                         'rev_comment' => $summary,
 753                         'rev_user' => $wgUser->getID(),
 754                         'rev_timestamp' => $dbw->timestamp($now),
 755                         'rev_minor_edit' => $isminor,
 756                         'rev_user_text' => $wgUser->getName(),
 757                         'inverse_timestamp' => $won,
 758                 ), $fname );
 759
 760                 $this->mTitle->resetArticleID( $newid );
 761
 762                 Article::onArticleCreate( $this->mTitle );
 763                 RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary );
 764
 765                 if ($watchthis) {
 766                         if(!$this->mTitle->userIsWatching()) $this->watch();
 767                 } else {
 768                         if ( $this->mTitle->userIsWatching() ) {
 769                                 $this->unwatch();
 770                         }
 771                 }
 772
 773                 # The talk page isn't in the regular link tables, so we need to update manually:
 774                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 775                 $dbw->update( 'page',
 776                         array( 'page_touched' => $dbw->timestamp($now) ),
 777                         array( 'page_namespace' => $talkns,
 778                                'page_title' => $ttl ),
 779                         $fname );
 780
 781                 # standard deferred updates
 782                 $this->editUpdates( $text, $summary, $isminor, $now );
 783
 784                 $oldid = 0; # new article
 785                 $this->showArticle( $text, wfMsg( 'newarticle' ), false, $isminor, $now, $summary, $oldid );
 786         }
 787
 788         /**
 789          * Fetch and uncompress the text for a given revision.
 790          * Can ask by rev_id number or timestamp (set $field)
 791          */
 792         function fetchRevisionText( $revId = null, $field = 'rev_id' ) {
 793                 $fname = 'Article::fetchRevisionText';
 794                 $dbw =& wfGetDB( DB_MASTER );
 795                 if( $revId ) {
 796                         $rev = $dbw->addQuotes( $revId );
 797                 } else {
 798                         $rev = 'page_latest';
 799                 }
 800                 $result = $dbw->query(
 801                         sprintf( "SELECT old_text, old_flags
 802                                 FROM %s,%s,%s
 803                                 WHERE old_id=rev_id AND rev_page=page_id AND page_id=%d
 804                                 AND %s=%s",
 805                                 $dbw->tableName( 'page' ),
 806                                 $dbw->tableName( 'revision' ),
 807                                 $dbw->tableName( 'text' ),
 808                                 IntVal( $this->mTitle->getArticleId() ),
 809                                 $field,
 810                                 $rev ),
 811                         $fname );
 812                 $obj = $dbw->fetchObject( $result );
 813                 $dbw->freeResult( $result );
 814                 $oldtext = Revision::getRevisionText( $obj );
 815                 return $oldtext;
 816         }
 817
 818         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = '', $edittime = NULL) {
 819                 $fname = 'Article::getTextOfLastEditWithSectionReplacedOrAdded';
 820                 if( is_null( $edittime ) ) {
 821                         $oldtext = $this->fetchRevisionText();
 822                 } else {
 823                         $oldtext = $this->fetchRevisionText( $edittime, 'rev_timestamp' );
 824                 }
 825                 if ($section != '') {
 826                         if($section=='new') {
 827                                 if($summary) $subject="== {$summary} ==\n\n";
 828                                 $text=$oldtext."\n\n".$subject.$text;
 829                         } else {
 830
 831                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 832                                 # comments to be stripped as well)
 833                                 $striparray=array();
 834                                 $parser=new Parser();
 835                                 $parser->mOutputType=OT_WIKI;
 836                                 $oldtext=$parser->strip($oldtext, $striparray, true);
 837
 838                                 # now that we can be sure that no pseudo-sections are in the source,
 839                                 # split it up
 840                                 # Unfortunately we can't simply do a preg_replace because that might
 841                                 # replace the wrong section, so we have to use the section counter instead
 842                                 $secs=preg_split('/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 843                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 844                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 845
 846                                 # section 0 is top (intro) section
 847                                 if($section!=0) {
 848
 849                                         # headline of old section - we need to go through this section
 850                                         # to determine if there are any subsections that now need to
 851                                         # be erased, as the mother section has been replaced with
 852                                         # the text of all subsections.
 853                                         $headline=$secs[$section*2-1];
 854                                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 855                                         $hlevel=$matches[1];
 856
 857                                         # determine headline level for wikimarkup headings
 858                                         if(strpos($hlevel,'=')!==false) {
 859                                                 $hlevel=strlen($hlevel);
 860                                         }
 861
 862                                         $secs[$section*2-1]=''; // erase old headline
 863                                         $count=$section+1;
 864                                         $break=false;
 865                                         while(!empty($secs[$count*2-1]) && !$break) {
 866
 867                                                 $subheadline=$secs[$count*2-1];
 868                                                 preg_match(
 869                                                  '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 870                                                 $subhlevel=$matches[1];
 871                                                 if(strpos($subhlevel,'=')!==false) {
 872                                                         $subhlevel=strlen($subhlevel);
 873                                                 }
 874                                                 if($subhlevel > $hlevel) {
 875                                                         // erase old subsections
 876                                                         $secs[$count*2-1]='';
 877                                                         $secs[$count*2]='';
 878                                                 }
 879                                                 if($subhlevel <= $hlevel) {
 880                                                         $break=true;
 881                                                 }
 882                                                 $count++;
 883
 884                                         }
 885
 886                                 }
 887                                 $text=join('',$secs);
 888                                 # reinsert the stuff that we stripped out earlier
 889                                 $text=$parser->unstrip($text,$striparray);
 890                                 $text=$parser->unstripNoWiki($text,$striparray);
 891                         }
 892
 893                 }
 894                 return $text;
 895         }
 896
 897         /**
 898          * Change an existing article. Puts the previous version back into the old table, updates RC
 899          * and all necessary caches, mostly via the deferred update array.
 900          *
 901          * It is possible to call this function from a command-line script, but note that you should
 902          * first set $wgUser, and clean up $wgDeferredUpdates after each edit.
 903          */
 904         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
 905                 global $wgOut, $wgUser;
 906                 global $wgDBtransactions, $wgMwRedir;
 907                 global $wgUseSquid, $wgInternalServer;
 908
 909                 $fname = 'Article::updateArticle';
 910                 $good = true;
 911
 912                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
 913                 if ( $minor && $wgUser->getID() ) { $me2 = 1; } else { $me2 = 0; }
 914                 if ( $this->isRedirect( $text ) ) {
 915                         # Remove all content but redirect
 916                         # This could be done by reconstructing the redirect from a title given by
 917                         # Title::newFromRedirect(), but then we wouldn't know which synonym the user
 918                         # wants to see
 919                         if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ')[^\\n]+)/i', $text, $m ) ) {
 920                                 $redir = 1;
 921                                 $text = $m[1] . "\n";
 922                         }
 923                 }
 924                 else { $redir = 0; }
 925
 926                 $text = $this->preSaveTransform( $text );
 927                 $dbw =& wfGetDB( DB_MASTER );
 928
 929                 # Update article, but only if changed.
 930
 931                 # It's important that we either rollback or complete, otherwise an attacker could
 932                 # overwrite cur entries by sending precisely timed user aborts. Random bored users
 933                 # could conceivably have the same effect, especially if cur is locked for long periods.
 934                 if( $wgDBtransactions ) {
 935                         $dbw->query( 'BEGIN', $fname );
 936                 } else {
 937                         $userAbort = ignore_user_abort( true );
 938                 }
 939
 940                 $oldtext = $this->getContent( true );
 941
 942                 if ( 0 != strcmp( $text, $oldtext ) ) {
 943                         $this->mCountAdjustment = $this->isCountable( $text )
 944                           - $this->isCountable( $oldtext );
 945                         $now = wfTimestampNow();
 946                         $won = wfInvertTimestamp( $now );
 947
 948                         $mungedText = $text;
 949                         $flags = Revision::compressRevisionText( $newtext );
 950
 951                         $lastRevision = $dbw->selectField(
 952                                 'page', 'page_latest', array( 'page_id' => $this->getId() ) );
 953
 954                         # Record the text to the text table
 955                         $old_id = $dbw->nextSequenceValue( 'text_old_id_val' );
 956                         $dbw->insert( 'text',
 957                                 array(
 958                                         'old_id' => $old_id,
 959                                         'old_text' => $mungedText,
 960                                         'old_flags' => $flags,
 961                                 ), $fname
 962                         );
 963                         $revisionId = $dbw->insertId();
 964
 965                         # Record the edit in revisions
 966                         $dbw->insert( 'revision',
 967                                 array(
 968                                         'rev_id' => $revisionId,
 969                                         'rev_page' => $this->getID(),
 970                                         'rev_comment' => $summary,
 971                                         'rev_minor_edit' => $me2,
 972                                         'rev_user' => $wgUser->getID(),
 973                                         'rev_user_text' => $wgUser->getName(),
 974                                         'rev_timestamp' => $dbw->timestamp( $now ),
 975                                         'inverse_timestamp' => $won
 976                                 ), $fname
 977                         );
 978
 979                         # Update page
 980                         $dbw->update( 'page',
 981                                 array( /* SET */
 982                                         'page_latest' => $revisionId,
 983                                         'page_touched' => $dbw->timestamp( $now ),
 984                                         'page_is_new' => 0,
 985                                         'page_is_redirect' => $redir,
 986                                 ), array( /* WHERE */
 987                                         'page_id' => $this->getID(),
 988                                         'page_latest' => $lastRevision, # Paranoia
 989                                 ), $fname
 990                         );
 991
 992                         if( $dbw->affectedRows() == 0 ) {
 993                                 /* Belated edit conflict! Run away!! */
 994                                 $good = false;
 995                         } else {
 996                                 # Update recentchanges and purge cache and whatnot
 997                                 $bot = (int)($wgUser->isBot() || $forceBot);
 998                                 RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
 999                                         $lastRevision, $this->getTimestamp(), $bot );
1000                                 Article::onArticleEdit( $this->mTitle );
1001                         }
1002                 }
1003
1004                 if( $wgDBtransactions ) {
1005                         $dbw->query( 'COMMIT', $fname );
1006                 } else {
1007                         ignore_user_abort( $userAbort );
1008                 }
1009
1010                 if ( $good ) {
1011                 if ($watchthis) {
1012                         if (!$this->mTitle->userIsWatching()) $this->watch();
1013                 } else {
1014                         if ( $this->mTitle->userIsWatching() ) {
1015                                 $this->unwatch();
1016                         }
1017                 }
1018                 # standard deferred updates
1019                 $this->editUpdates( $text, $summary, $minor, $now );
1020
1021
1022                 $urls = array();
1023                 # Template namespace
1024                 # Purge all articles linking here
1025                 if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
1026                         $titles = $this->mTitle->getLinksTo();
1027                         Title::touchArray( $titles );
1028                         if ( $wgUseSquid ) {
1029                                         foreach ( $titles as $title ) {
1030                                                 $urls[] = $title->getInternalURL();
1031                                         }
1032                         }
1033                 }
1034
1035                 # Squid updates
1036                 if ( $wgUseSquid ) {
1037                         $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
1038                         $u = new SquidUpdate( $urls );
1039                         $u->doUpdate();
1040                 }
1041
1042                 $this->showArticle( $text, wfMsg( 'updated' ), $sectionanchor, $me2, $now, $summary, $revisionId );
1043                 }
1044                 return $good;
1045         }
1046
1047         /**
1048          * After we've either updated or inserted the article, update
1049          * the link tables and redirect to the new page.
1050          */
1051         function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid ) {
1052                 global $wgOut, $wgUser, $wgLinkCache, $wgEnotif;
1053
1054                 $wgLinkCache = new LinkCache();
1055                 # Select for update
1056                 $wgLinkCache->forUpdate( true );
1057
1058                 # Get old version of link table to allow incremental link updates
1059                 $wgLinkCache->preFill( $this->mTitle );
1060                 $wgLinkCache->clear();
1061
1062                 # Parse the text and replace links with placeholders
1063                 $wgOut = new OutputPage();
1064                 $wgOut->addWikiText( $text );
1065
1066                 # Look up the links in the DB and add them to the link cache
1067                 $wgOut->transformBuffer( RLH_FOR_UPDATE );
1068
1069                 if( $this->isRedirect( $text ) )
1070                         $r = 'redirect=no';
1071                 else
1072                         $r = '';
1073                 $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
1074
1075                 # this call would better fit into RecentChange::notifyEdit and RecentChange::notifyNew .
1076                 # this will be improved later (to-do)
1077
1078                 include_once( "UserMailer.php" );
1079                 $wgEnotif = new EmailNotification ();
1080                 $wgEnotif->NotifyOnPageChange( $wgUser->getID(), $this->mTitle->getDBkey(), $this->mTitle->getNamespace(),$now, $summary, $me2, $oldid );
1081         }
1082
1083         /**
1084          * Validate article
1085          * @todo document this function a bit more
1086          */
1087         function validate () {
1088                 global $wgOut, $wgUseValidation;
1089                 if( $wgUseValidation ) {
1090                         require_once ( 'SpecialValidate.php' ) ;
1091                         $wgOut->setPagetitle( wfMsg( 'validate' ) . ': ' . $this->mTitle->getPrefixedText() );
1092                         $wgOut->setRobotpolicy( 'noindex,follow' );
1093                         if( $this->mTitle->getNamespace() != 0 ) {
1094                                 $wgOut->addHTML( wfMsg( 'val_validate_article_namespace_only' ) );
1095                                 return;
1096                         }
1097                         $v = new Validation;
1098                         $v->validate_form( $this->mTitle->getDBkey() );
1099                 } else {
1100                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
1101                 }
1102         }
1103
1104         /**
1105          * Mark this particular edit as patrolled
1106          */
1107         function markpatrolled() {
1108                 global $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgUseRCPatrol, $wgUser;
1109                 $wgOut->setRobotpolicy( 'noindex,follow' );
1110
1111                 if ( !$wgUseRCPatrol )
1112                 {
1113                         $wgOut->errorpage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1114                         return;
1115                 }
1116                 if ( $wgUser->getID() == 0 )
1117                 {
1118                         $wgOut->loginToUse();
1119                         return;
1120                 }
1121                 if ( $wgOnlySysopsCanPatrol && !$wgUser->isAllowed('patrol') )
1122                 {
1123                         $wgOut->sysopRequired();
1124                         return;
1125                 }
1126                 $rcid = $wgRequest->getVal( 'rcid' );
1127                 if ( !is_null ( $rcid ) )
1128                 {
1129                         RecentChange::markPatrolled( $rcid );
1130                         $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
1131                         $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
1132
1133                         $rcTitle = Title::makeTitle( NS_SPECIAL, 'Recentchanges' );
1134                         $wgOut->returnToMain( false, $rcTitle->getPrefixedText() );
1135                 }
1136                 else
1137                 {
1138                         $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1139                 }
1140         }
1141
1142
1143         /**
1144          * Add this page to $wgUser's watchlist
1145          */
1146
1147         function watch() {
1148
1149                 global $wgUser, $wgOut;
1150
1151                 if ( 0 == $wgUser->getID() ) {
1152                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1153                         return;
1154                 }
1155                 if ( wfReadOnly() ) {
1156                         $wgOut->readOnlyPage();
1157                         return;
1158                 }
1159
1160                 if (wfRunHooks('WatchArticle', $wgUser, $this)) {
1161
1162                         $wgUser->addWatch( $this->mTitle );
1163                         $wgUser->saveSettings();
1164
1165                         wfRunHooks('WatchArticleComplete', $wgUser, $this);
1166
1167                         $wgOut->setPagetitle( wfMsg( 'addedwatch' ) );
1168                         $wgOut->setRobotpolicy( 'noindex,follow' );
1169
1170                         $link = $this->mTitle->getPrefixedText();
1171                         $text = wfMsg( 'addedwatchtext', $link );
1172                         $wgOut->addWikiText( $text );
1173                 }
1174
1175                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1176         }
1177
1178         /**
1179          * Stop watching a page
1180          */
1181
1182         function unwatch() {
1183
1184                 global $wgUser, $wgOut;
1185
1186                 if ( 0 == $wgUser->getID() ) {
1187                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1188                         return;
1189                 }
1190                 if ( wfReadOnly() ) {
1191                         $wgOut->readOnlyPage();
1192                         return;
1193                 }
1194
1195                 if (wfRunHooks('UnwatchArticle', $wgUser, $this)) {
1196
1197                         $wgUser->removeWatch( $this->mTitle );
1198                         $wgUser->saveSettings();
1199
1200                         wfRunHooks('UnwatchArticleComplete', $wgUser, $this);
1201
1202                         $wgOut->setPagetitle( wfMsg( 'removedwatch' ) );
1203                         $wgOut->setRobotpolicy( 'noindex,follow' );
1204
1205                         $link = $this->mTitle->getPrefixedText();
1206                         $text = wfMsg( 'removedwatchtext', $link );
1207                         $wgOut->addWikiText( $text );
1208                 }
1209
1210                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1211         }
1212
1213         /**
1214          * protect a page
1215          */
1216         function protect( $limit = 'sysop' ) {
1217                 global $wgUser, $wgOut, $wgRequest;
1218
1219                 if ( ! $wgUser->isAllowed('protect') ) {
1220                         $wgOut->sysopRequired();
1221                         return;
1222                 }
1223                 if ( wfReadOnly() ) {
1224                         $wgOut->readOnlyPage();
1225                         return;
1226                 }
1227                 $id = $this->mTitle->getArticleID();
1228                 if ( 0 == $id ) {
1229                         $wgOut->fatalError( wfMsg( 'badarticleerror' ) );
1230                         return;
1231                 }
1232
1233                 $confirm = $wgRequest->getBool( 'wpConfirmProtect' ) && $wgRequest->wasPosted();
1234                 $moveonly = $wgRequest->getBool( 'wpMoveOnly' );
1235                 $reason = $wgRequest->getText( 'wpReasonProtect' );
1236
1237                 if ( $confirm ) {
1238                         $dbw =& wfGetDB( DB_MASTER );
1239                         $dbw->update( 'page',
1240                                 array( /* SET */
1241                                         'page_touched' => $dbw->timestamp(),
1242                                         'page_restrictions' => (string)$limit
1243                                 ), array( /* WHERE */
1244                                         'page_id' => $id
1245                                 ), 'Article::protect'
1246                         );
1247
1248                         $restrictions = "move=" . $limit;
1249                         if( !$moveonly ) {
1250                                 $restrictions .= ":edit=" . $limit;
1251                         }
1252                         if (wfRunHooks('ArticleProtect', $this, $wgUser, $limit == 'sysop', $reason, $moveonly)) {
1253
1254                                 $dbw =& wfGetDB( DB_MASTER );
1255                                 $dbw->update( 'page',
1256                                                           array( /* SET */
1257                                                                          'page_touched' => $dbw->timestamp(),
1258                                                                          'page_restrictions' => $restrictions
1259                                                                          ), array( /* WHERE */
1260                                                                                            'page_id' => $id
1261                                                                                            ), 'Article::protect'
1262                                                           );
1263
1264                                 wfRunHooks('ArticleProtectComplete', $this, $wgUser, $limit == 'sysop', $reason, $moveonly);
1265
1266                                 $log = new LogPage( 'protect' );
1267                                 if ( $limit === '' ) {
1268                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1269                                 } else {
1270                                         $log->addEntry( 'protect', $this->mTitle, $reason );
1271                                 }
1272                                 $wgOut->redirect( $this->mTitle->getFullURL() );
1273                         }
1274                         return;
1275                 } else {
1276                         $reason = htmlspecialchars( wfMsg( 'protectreason' ) );
1277                         return $this->confirmProtect( '', $reason, $limit );
1278                 }
1279         }
1280
1281         /**
1282          * Output protection confirmation dialog
1283          */
1284         function confirmProtect( $par, $reason, $limit = 'sysop'  ) {
1285                 global $wgOut;
1286
1287                 wfDebug( "Article::confirmProtect\n" );
1288
1289                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1290                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1291
1292                 $check = '';
1293                 $protcom = '';
1294                 $moveonly = '';
1295
1296                 if ( $limit === '' ) {
1297                         $wgOut->setPageTitle( wfMsg( 'confirmunprotect' ) );
1298                         $wgOut->setSubtitle( wfMsg( 'unprotectsub', $sub ) );
1299                         $wgOut->addWikiText( wfMsg( 'confirmunprotecttext' ) );
1300                         $check = htmlspecialchars( wfMsg( 'confirmunprotect' ) );
1301                         $protcom = htmlspecialchars( wfMsg( 'unprotectcomment' ) );
1302                         $formaction = $this->mTitle->escapeLocalURL( 'action=unprotect' . $par );
1303                 } else {
1304                         $wgOut->setPageTitle( wfMsg( 'confirmprotect' ) );
1305                         $wgOut->setSubtitle( wfMsg( 'protectsub', $sub ) );
1306                         $wgOut->addWikiText( wfMsg( 'confirmprotecttext' ) );
1307                         $check = htmlspecialchars( wfMsg( 'confirmprotect' ) );
1308                         $moveonly = htmlspecialchars( wfMsg( 'protectmoveonly' ) );
1309                         $protcom = htmlspecialchars( wfMsg( 'protectcomment' ) );
1310                         $formaction = $this->mTitle->escapeLocalURL( 'action=protect' . $par );
1311                 }
1312
1313                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1314
1315                 $wgOut->addHTML( "
1316 <form id='protectconfirm' method='post' action=\"{$formaction}\">
1317         <table border='0'>
1318                 <tr>
1319                         <td align='right'>
1320                                 <label for='wpReasonProtect'>{$protcom}:</label>
1321                         </td>
1322                         <td align='left'>
1323                                 <input type='text' size='60' name='wpReasonProtect' id='wpReasonProtect' value=\"" . htmlspecialchars( $reason ) . "\" />
1324                         </td>
1325                 </tr>
1326                 <tr>
1327                         <td>&nbsp;</td>
1328                 </tr>
1329                 <tr>
1330                         <td align='right'>
1331                                 <input type='checkbox' name='wpConfirmProtect' value='1' id='wpConfirmProtect' />
1332                         </td>
1333                         <td>
1334                                 <label for='wpConfirmProtect'>{$check}</label>
1335                         </td>
1336                 </tr> " );
1337                 if($moveonly != '') {
1338                         $wgOut->AddHTML( "
1339                 <tr>
1340                         <td align='right'>
1341                                 <input type='checkbox' name='wpMoveOnly' value='1' id='wpMoveOnly' />
1342                         </td>
1343                         <td>
1344                                 <label for='wpMoveOnly'>{$moveonly}</label>
1345                         </td>
1346                 </tr> " );
1347                 }
1348                 $wgOut->addHTML( "
1349                 <tr>
1350                         <td>&nbsp;</td>
1351                         <td>
1352                                 <input type='submit' name='wpConfirmProtectB' value=\"{$confirm}\" />
1353                         </td>
1354                 </tr>
1355         </table>
1356 </form>\n" );
1357
1358                 $wgOut->returnToMain( false );
1359         }
1360
1361         /**
1362          * Unprotect the pages
1363          */
1364         function unprotect() {
1365                 return $this->protect( '' );
1366         }
1367
1368         /*
1369          * UI entry point for page deletion
1370          */
1371         function delete() {
1372                 global $wgUser, $wgOut, $wgMessageCache, $wgRequest;
1373                 $fname = 'Article::delete';
1374                 $confirm = $wgRequest->getBool( 'wpConfirm' ) && $wgRequest->wasPosted();
1375                 $reason = $wgRequest->getText( 'wpReason' );
1376
1377                 # This code desperately needs to be totally rewritten
1378
1379                 # Check permissions
1380                 if ( ( ! $wgUser->isAllowed('delete') ) ) {
1381                         $wgOut->sysopRequired();
1382                         return;
1383                 }
1384                 if ( wfReadOnly() ) {
1385                         $wgOut->readOnlyPage();
1386                         return;
1387                 }
1388
1389                 # Better double-check that it hasn't been deleted yet!
1390                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1391                 if ( ( '' == trim( $this->mTitle->getText() ) )
1392                   or ( $this->mTitle->getArticleId() == 0 ) ) {
1393                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1394                         return;
1395                 }
1396
1397                 if ( $confirm ) {
1398                         $this->doDelete( $reason );
1399                         return;
1400                 }
1401
1402                 # determine whether this page has earlier revisions
1403                 # and insert a warning if it does
1404                 # we select the text because it might be useful below
1405                 $dbr =& $this->getDB();
1406                 $ns = $this->mTitle->getNamespace();
1407                 $title = $this->mTitle->getDBkey();
1408                 $old = $dbr->selectRow( 'old',
1409                         array( 'old_text', 'old_flags' ),
1410                         array(
1411                                 'old_namespace' => $ns,
1412                                 'old_title' => $title,
1413                         ), $fname, $this->getSelectOptions( array( 'ORDER BY' => 'inverse_timestamp' ) )
1414                 );
1415
1416                 if( $old !== false && !$confirm ) {
1417                         $skin=$wgUser->getSkin();
1418                         $wgOut->addHTML('<b>'.wfMsg('historywarning'));
1419                         $wgOut->addHTML( $skin->historyLink() .'</b>');
1420                 }
1421
1422                 # Fetch cur_text
1423                 $s = $dbr->selectRow( 'cur',
1424                         array( 'cur_text' ),
1425                         array(
1426                                 'cur_namespace' => $ns,
1427                                 'cur_title' => $title,
1428                         ), $fname, $this->getSelectOptions()
1429                 );
1430
1431                 if( $s !== false ) {
1432                         # if this is a mini-text, we can paste part of it into the deletion reason
1433
1434                         #if this is empty, an earlier revision may contain "useful" text
1435                         $blanked = false;
1436                         if($s->cur_text != '') {
1437                                 $text=$s->cur_text;
1438                         } else {
1439                                 if($old) {
1440                                         $text = Revision::getRevisionText( $old );
1441                                         $blanked = true;
1442                                 }
1443
1444                         }
1445
1446                         $length=strlen($text);
1447
1448                         # this should not happen, since it is not possible to store an empty, new
1449                         # page. Let's insert a standard text in case it does, though
1450                         if($length == 0 && $reason === '') {
1451                                 $reason = wfMsg('exblank');
1452                         }
1453
1454                         if($length < 500 && $reason === '') {
1455
1456                                 # comment field=255, let's grep the first 150 to have some user
1457                                 # space left
1458                                 $text=substr($text,0,150);
1459                                 # let's strip out newlines and HTML tags
1460                                 $text=preg_replace('/\"/',"'",$text);
1461                                 $text=preg_replace('/\</','&lt;',$text);
1462                                 $text=preg_replace('/\>/','&gt;',$text);
1463                                 $text=preg_replace("/[\n\r]/",'',$text);
1464                                 if(!$blanked) {
1465                                         $reason=wfMsg('excontent'). " '".$text;
1466                                 } else {
1467                                         $reason=wfMsg('exbeforeblank') . " '".$text;
1468                                 }
1469                                 if($length>150) { $reason .= '...'; } # we've only pasted part of the text
1470                                 $reason.="'";
1471                         }
1472                 }
1473
1474                 return $this->confirmDelete( '', $reason );
1475         }
1476
1477         /**
1478          * Output deletion confirmation dialog
1479          */
1480         function confirmDelete( $par, $reason ) {
1481                 global $wgOut;
1482
1483                 wfDebug( "Article::confirmDelete\n" );
1484
1485                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1486                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1487                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1488                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1489
1490                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1491
1492                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1493                 $check = htmlspecialchars( wfMsg( 'confirmcheck' ) );
1494                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1495
1496                 $wgOut->addHTML( "
1497 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1498         <table border='0'>
1499                 <tr>
1500                         <td align='right'>
1501                                 <label for='wpReason'>{$delcom}:</label>
1502                         </td>
1503                         <td align='left'>
1504                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1505                         </td>
1506                 </tr>
1507                 <tr>
1508                         <td>&nbsp;</td>
1509                 </tr>
1510                 <tr>
1511                         <td align='right'>
1512                                 <input type='checkbox' name='wpConfirm' value='1' id='wpConfirm' />
1513                         </td>
1514                         <td>
1515                                 <label for='wpConfirm'>{$check}</label>
1516                         </td>
1517                 </tr>
1518                 <tr>
1519                         <td>&nbsp;</td>
1520                         <td>
1521                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1522                         </td>
1523                 </tr>
1524         </table>
1525 </form>\n" );
1526
1527                 $wgOut->returnToMain( false );
1528         }
1529
1530
1531         /**
1532          * Perform a deletion and output success or failure messages
1533          */
1534         function doDelete( $reason ) {
1535                 global $wgOut, $wgUser, $wgContLang;
1536                 $fname = 'Article::doDelete';
1537                 wfDebug( $fname."\n" );
1538
1539                 if (wfRunHooks('ArticleDelete', $this, $wgUser, $reason)) {
1540                         if ( $this->doDeleteArticle( $reason ) ) {
1541                                 $deleted = $this->mTitle->getPrefixedText();
1542
1543                                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1544                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1545
1546                                 $sk = $wgUser->getSkin();
1547                                 $loglink = $sk->makeKnownLink( $wgContLang->getNsText( NS_PROJECT ) .
1548                                                                                            ':' . wfMsgForContent( 'dellogpage' ),
1549                                                                                            wfMsg( 'deletionlog' ) );
1550
1551                                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
1552
1553                                 $wgOut->addHTML( '<p>' . $text . "</p>\n" );
1554                                 $wgOut->returnToMain( false );
1555                                 wfRunHooks('ArticleDeleteComplete', $this, $wgUser, $reason);
1556                         } else {
1557                                 $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1558                         }
1559                 }
1560         }
1561
1562         /**
1563          * Back-end article deletion
1564          * Deletes the article with database consistency, writes logs, purges caches
1565          * Returns success
1566          */
1567         function doDeleteArticle( $reason ) {
1568                 global $wgUser;
1569                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
1570
1571                 $fname = 'Article::doDeleteArticle';
1572                 wfDebug( $fname."\n" );
1573
1574                 $dbw =& wfGetDB( DB_MASTER );
1575                 $ns = $this->mTitle->getNamespace();
1576                 $t = $this->mTitle->getDBkey();
1577                 $id = $this->mTitle->getArticleID();
1578
1579                 if ( $t == '' || $id == 0 ) {
1580                         return false;
1581                 }
1582
1583                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
1584                 array_push( $wgDeferredUpdateList, $u );
1585
1586                 $linksTo = $this->mTitle->getLinksTo();
1587
1588                 # Squid purging
1589                 if ( $wgUseSquid ) {
1590                         $urls = array(
1591                                 $this->mTitle->getInternalURL(),
1592                                 $this->mTitle->getInternalURL( 'history' )
1593                         );
1594                         foreach ( $linksTo as $linkTo ) {
1595                                 $urls[] = $linkTo->getInternalURL();
1596                         }
1597
1598                         $u = new SquidUpdate( $urls );
1599                         array_push( $wgDeferredUpdateList, $u );
1600
1601                 }
1602
1603                 # Client and file cache invalidation
1604                 Title::touchArray( $linksTo );
1605
1606                 # Move article and history to the "archive" table
1607                 $archiveTable = $dbw->tableName( 'archive' );
1608                 $oldTable = $dbw->tableName( 'old' );
1609                 $curTable = $dbw->tableName( 'cur' );
1610                 $recentchangesTable = $dbw->tableName( 'recentchanges' );
1611                 $linksTable = $dbw->tableName( 'links' );
1612                 $brokenlinksTable = $dbw->tableName( 'brokenlinks' );
1613
1614                 $dbw->insertSelect( 'archive', 'cur',
1615                         array(
1616                                 'ar_namespace' => 'cur_namespace',
1617                                 'ar_title' => 'cur_title',
1618                                 'ar_text' => 'cur_text',
1619                                 'ar_comment' => 'cur_comment',
1620                                 'ar_user' => 'cur_user',
1621                                 'ar_user_text' => 'cur_user_text',
1622                                 'ar_timestamp' => 'cur_timestamp',
1623                                 'ar_minor_edit' => 'cur_minor_edit',
1624                                 'ar_flags' => 0,
1625                         ), array(
1626                                 'cur_namespace' => $ns,
1627                                 'cur_title' => $t,
1628                         ), $fname
1629                 );
1630
1631                 $dbw->insertSelect( 'archive', 'old',
1632                         array(
1633                                 'ar_namespace' => 'old_namespace',
1634                                 'ar_title' => 'old_title',
1635                                 'ar_text' => 'old_text',
1636                                 'ar_comment' => 'old_comment',
1637                                 'ar_user' => 'old_user',
1638                                 'ar_user_text' => 'old_user_text',
1639                                 'ar_timestamp' => 'old_timestamp',
1640                                 'ar_minor_edit' => 'old_minor_edit',
1641                                 'ar_flags' => 'old_flags'
1642                         ), array(
1643                                 'old_namespace' => $ns,
1644                                 'old_title' => $t,
1645                         ), $fname
1646                 );
1647
1648                 # Now that it's safely backed up, delete it
1649
1650                 $dbw->delete( 'cur', array( 'cur_namespace' => $ns, 'cur_title' => $t ), $fname );
1651                 $dbw->delete( 'old', array( 'old_namespace' => $ns, 'old_title' => $t ), $fname );
1652                 $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), $fname );
1653
1654                 # Finally, clean up the link tables
1655                 $t = $this->mTitle->getPrefixedDBkey();
1656
1657                 Article::onArticleDelete( $this->mTitle );
1658
1659                 # Insert broken links
1660                 $brokenLinks = array();
1661                 foreach ( $linksTo as $titleObj ) {
1662                         # Get article ID. Efficient because it was loaded into the cache by getLinksTo().
1663                         $linkID = $titleObj->getArticleID();
1664                         $brokenLinks[] = array( 'bl_from' => $linkID, 'bl_to' => $t );
1665                 }
1666                 $dbw->insert( 'brokenlinks', $brokenLinks, $fname, 'IGNORE' );
1667
1668                 # Delete live links
1669                 $dbw->delete( 'links', array( 'l_to' => $id ) );
1670                 $dbw->delete( 'links', array( 'l_from' => $id ) );
1671                 $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
1672                 $dbw->delete( 'brokenlinks', array( 'bl_from' => $id ) );
1673                 $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
1674
1675                 # Log the deletion
1676                 $log = new LogPage( 'delete' );
1677                 $log->addEntry( 'delete', $this->mTitle, $reason );
1678
1679                 # Clear the cached article id so the interface doesn't act like we exist
1680                 $this->mTitle->resetArticleID( 0 );
1681                 $this->mTitle->mArticleID = 0;
1682                 return true;
1683         }
1684
1685         /**
1686          * Revert a modification
1687          */
1688         function rollback() {
1689                 global $wgUser, $wgOut, $wgRequest;
1690                 $fname = 'Article::rollback';
1691
1692                 if ( ! $wgUser->isAllowed('rollback') ) {
1693                         $wgOut->sysopRequired();
1694                         return;
1695                 }
1696                 if ( wfReadOnly() ) {
1697                         $wgOut->readOnlyPage( $this->getContent( true ) );
1698                         return;
1699                 }
1700                 $dbw =& wfGetDB( DB_MASTER );
1701
1702                 # Enhanced rollback, marks edits rc_bot=1
1703                 $bot = $wgRequest->getBool( 'bot' );
1704
1705                 # Replace all this user's current edits with the next one down
1706                 $tt = $this->mTitle->getDBKey();
1707                 $n = $this->mTitle->getNamespace();
1708
1709                 # Get the last editor, lock table exclusively
1710                 $s = $dbw->selectRow( 'cur',
1711                         array( 'cur_id','cur_user','cur_user_text','cur_comment' ),
1712                         array( 'cur_title' => $tt, 'cur_namespace' => $n ),
1713                         $fname, 'FOR UPDATE'
1714                 );
1715                 if( $s === false ) {
1716                         # Something wrong
1717                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
1718                         return;
1719                 }
1720                 $ut = $dbw->strencode( $s->cur_user_text );
1721                 $uid = $s->cur_user;
1722                 $pid = $s->cur_id;
1723
1724                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
1725                 if( $from != $s->cur_user_text ) {
1726                         $wgOut->setPageTitle(wfmsg('rollbackfailed'));
1727                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
1728                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
1729                                 htmlspecialchars( $from ),
1730                                 htmlspecialchars( $s->cur_user_text ) ) );
1731                         if($s->cur_comment != '') {
1732                                 $wgOut->addHTML(
1733                                         wfMsg('editcomment',
1734                                         htmlspecialchars( $s->cur_comment ) ) );
1735                         }
1736                         return;
1737                 }
1738
1739                 # Get the last edit not by this guy
1740                 $s = $dbw->selectRow( 'old',
1741                         array( 'old_text','old_user','old_user_text','old_timestamp','old_flags' ),
1742                         array(
1743                                 'old_namespace' => $n,
1744                                 'old_title' => $tt,
1745                                 "old_user <> {$uid} OR old_user_text <> '{$ut}'"
1746                         ), $fname, array( 'FOR UPDATE', 'USE INDEX' => 'name_title_timestamp' )
1747                 );
1748                 if( $s === false ) {
1749                         # Something wrong
1750                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
1751                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
1752                         return;
1753                 }
1754
1755                 if ( $bot ) {
1756                         # Mark all reverted edits as bot
1757                         $dbw->update( 'recentchanges',
1758                                 array( /* SET */
1759                                         'rc_bot' => 1
1760                                 ), array( /* WHERE */
1761                                         'rc_user' => $uid,
1762                                         "rc_timestamp > '{$s->old_timestamp}'",
1763                                 ), $fname
1764                         );
1765                 }
1766
1767                 # Save it!
1768                 $newcomment = wfMsg( 'revertpage', $s->old_user_text, $from );
1769                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1770                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1771                 $wgOut->addHTML( '<h2>' . htmlspecialchars( $newcomment ) . "</h2>\n<hr />\n" );
1772                 $this->updateArticle( Revision::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1773                 Article::onArticleEdit( $this->mTitle );
1774                 $wgOut->returnToMain( false );
1775         }
1776
1777
1778         /**
1779          * Do standard deferred updates after page view
1780          * @private
1781          */
1782         function viewUpdates() {
1783                 global $wgDeferredUpdateList;
1784
1785                 if ( 0 != $this->getID() ) {
1786                         global $wgDisableCounters;
1787                         if( !$wgDisableCounters ) {
1788                                 Article::incViewCount( $this->getID() );
1789                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1790                                 array_push( $wgDeferredUpdateList, $u );
1791                         }
1792                 }
1793
1794                 # Update newtalk status if user is reading their own
1795                 # talk page
1796
1797                 global $wgUser;
1798                 if ($this->mTitle->getNamespace() == NS_USER_TALK &&
1799                         $this->mTitle->getText() == $wgUser->getName()) {
1800                         require_once( 'UserTalkUpdate.php' );
1801                         $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(), $this->mTitle->getDBkey(), false, false, false );
1802                 }
1803         }
1804
1805         /**
1806          * Do standard deferred updates after page edit.
1807          * Every 1000th edit, prune the recent changes table.
1808          * @private
1809          * @param string $text
1810          */
1811         function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange) {
1812                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1813                 global $wgMessageCache, $wgUser;
1814
1815                 wfSeedRandom();
1816                 if ( 0 == mt_rand( 0, 999 ) ) {
1817                         $dbw =& wfGetDB( DB_MASTER );
1818                         $cutoff = $dbw->timestamp( time() - ( 7 * 86400 ) );
1819                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1820                         $dbw->query( $sql );
1821                 }
1822                 $id = $this->getID();
1823                 $title = $this->mTitle->getPrefixedDBkey();
1824                 $shortTitle = $this->mTitle->getDBkey();
1825
1826                 $adj = $this->mCountAdjustment;
1827
1828                 if ( 0 != $id ) {
1829                         $u = new LinksUpdate( $id, $title );
1830                         array_push( $wgDeferredUpdateList, $u );
1831                         $u = new SiteStatsUpdate( 0, 1, $adj );
1832                         array_push( $wgDeferredUpdateList, $u );
1833                         $u = new SearchUpdate( $id, $title, $text );
1834                         array_push( $wgDeferredUpdateList, $u );
1835
1836                         # If this is another user's talk page,
1837                         # create a watchlist entry for this page
1838
1839                         if ($this->mTitle->getNamespace() == NS_USER_TALK &&
1840                                 $shortTitle != $wgUser->getName()) {
1841                                 require_once( 'UserTalkUpdate.php' );
1842                                 $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle, $summary, $minoredit, $timestamp_of_pagechange);
1843                         }
1844
1845                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1846                                 $wgMessageCache->replace( $shortTitle, $text );
1847                         }
1848                 }
1849         }
1850
1851         /**
1852          * @todo document this function
1853          * @private
1854          * @param string $oldid         Revision ID of this article revision
1855          */
1856         function setOldSubtitle( $oldid=0 ) {
1857                 global $wgLang, $wgOut, $wgUser;
1858
1859                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1860                 $sk = $wgUser->getSkin();
1861                 $lnk = $sk->makeKnownLinkObj ( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
1862                 $prevlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid );
1863                 $nextlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
1864                 $r = wfMsg( 'revisionasofwithlink', $td, $lnk, $prevlink, $nextlink );
1865                 $wgOut->setSubtitle( $r );
1866         }
1867
1868         /**
1869          * This function is called right before saving the wikitext,
1870          * so we can do things like signatures and links-in-context.
1871          *
1872          * @param string $text
1873          */
1874         function preSaveTransform( $text ) {
1875                 global $wgParser, $wgUser;
1876                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
1877         }
1878
1879         /* Caching functions */
1880
1881         /**
1882          * checkLastModified returns true if it has taken care of all
1883          * output to the client that is necessary for this request.
1884          * (that is, it has sent a cached version of the page)
1885          */
1886         function tryFileCache() {
1887                 static $called = false;
1888                 if( $called ) {
1889                         wfDebug( " tryFileCache() -- called twice!?\n" );
1890                         return;
1891                 }
1892                 $called = true;
1893                 if($this->isFileCacheable()) {
1894                         $touched = $this->mTouched;
1895                         $cache = new CacheManager( $this->mTitle );
1896                         if($cache->isFileCacheGood( $touched )) {
1897                                 global $wgOut;
1898                                 wfDebug( " tryFileCache() - about to load\n" );
1899                                 $cache->loadFromFileCache();
1900                                 return true;
1901                         } else {
1902                                 wfDebug( " tryFileCache() - starting buffer\n" );
1903                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1904                         }
1905                 } else {
1906                         wfDebug( " tryFileCache() - not cacheable\n" );
1907                 }
1908         }
1909
1910         /**
1911          * Check if the page can be cached
1912          * @return bool
1913          */
1914         function isFileCacheable() {
1915                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
1916                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
1917
1918                 return $wgUseFileCache
1919                         and (!$wgShowIPinHeader)
1920                         and ($this->getID() != 0)
1921                         and ($wgUser->getId() == 0)
1922                         and (!$wgUser->getNewtalk())
1923                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
1924                         and (empty( $action ) || $action == 'view')
1925                         and (!isset($oldid))
1926                         and (!isset($diff))
1927                         and (!isset($redirect))
1928                         and (!isset($printable))
1929                         and (!$this->mRedirectedFrom);
1930         }
1931
1932         /**
1933          * Loads cur_touched and returns a value indicating if it should be used
1934          *
1935          */
1936         function checkTouched() {
1937                 $fname = 'Article::checkTouched';
1938                 $id = $this->getID();
1939                 $dbr =& $this->getDB();
1940                 $s = $dbr->selectRow( 'page', array( 'page_touched', 'page_is_redirect' ),
1941                         array( 'page_id' => $id ), $fname, $this->getSelectOptions() );
1942                 if( $s !== false ) {
1943                         $this->mTouched = wfTimestamp( TS_MW, $s->page_touched );
1944                         return !$s->page_is_redirect;
1945                 } else {
1946                         return false;
1947                 }
1948         }
1949
1950         /**
1951          * Edit an article without doing all that other stuff
1952          *
1953          * @param string $text text submitted
1954          * @param string $comment comment submitted
1955          * @param integer $minor whereas it's a minor modification
1956          */
1957         function quickEdit( $text, $comment = '', $minor = 0 ) {
1958                 global $wgUser;
1959                 $fname = 'Article::quickEdit';
1960
1961                 #wfDebugDieBacktrace( "$fname called." );
1962
1963                 wfProfileIn( $fname );
1964
1965                 $dbw =& wfGetDB( DB_MASTER );
1966                 $ns = $this->mTitle->getNamespace();
1967                 $dbkey = $this->mTitle->getDBkey();
1968                 $encDbKey = $dbw->strencode( $dbkey );
1969                 $timestamp = wfTimestampNow();
1970                 # insert new text
1971                 $dbw->insert( 'text', array(
1972                                 'old_text' => $text,
1973                                 'old_flags' => "" ), $fname );
1974                 $text_id = $dbw->insertID();
1975
1976                 # update page
1977                 $dbw->update( 'page', array(
1978                         'page_is_new' => 0,
1979                         'page_touched' => $timestamp,
1980                         'page_is_redirect' => $this->isRedirect( $text ) ? 1 : 0,
1981                         'page_latest' => $text_id ),
1982                         array( 'page_namespace' => $ns, 'page_title' => $dbkey ), $fname );
1983                 # Retrieve page ID
1984                 $page_id = $dbw->selectField( 'page', 'page_id', array( 'page_namespace' => $ns, 'page_title' => $dbkey ), $fname );
1985
1986                 # update revision
1987                 $dbw->insert( 'revision', array(
1988                         'rev_id' => $text_id,
1989                         'rev_page' => $page_id,
1990                         'rev_comment' => $comment,
1991                         'rev_user' => $wgUser->getID(),
1992                         'rev_user_text' => $wgUser->getName(),
1993                         'rev_timestamp' => $timestamp,
1994                         'inverse_timestamp' => wfInvertTimestamp( $timestamp ),
1995                         'rev_minor_edit' => intval($minor) ),
1996                         $fname );
1997 /*
1998                 # Save to history
1999                 $dbw->insertSelect( 'old', 'cur',
2000                         array(
2001                                 'old_namespace' => 'cur_namespace',
2002                                 'old_title' => 'cur_title',
2003                                 'old_text' => 'cur_text',
2004                                 'old_comment' => 'cur_comment',
2005                                 'old_user' => 'cur_user',
2006                                 'old_user_text' => 'cur_user_text',
2007                                 'old_timestamp' => 'cur_timestamp',
2008                                 'inverse_timestamp' => '99999999999999-cur_timestamp',
2009                         ), array(
2010                                 'cur_namespace' => $ns,
2011                                 'cur_title' => $dbkey,
2012                         ), $fname
2013                 );
2014
2015                 # Use the affected row count to determine if the article is new
2016                 $numRows = $dbw->affectedRows();
2017
2018                 # Make an array of fields to be inserted
2019                 $fields = array(
2020                         'cur_text' => $text,
2021                         'cur_timestamp' => $timestamp,
2022                         'cur_user' => $wgUser->getID(),
2023                         'cur_user_text' => $wgUser->getName(),
2024                         'inverse_timestamp' => wfInvertTimestamp( $timestamp ),
2025                         'cur_comment' => $comment,
2026                         'cur_is_redirect' => $this->isRedirect( $text ) ? 1 : 0,
2027                         'cur_minor_edit' => intval($minor),
2028                         'cur_touched' => $dbw->timestamp($timestamp),
2029                 );
2030
2031                 if ( $numRows ) {
2032                         # Update article
2033                         $fields['cur_is_new'] = 0;
2034                         $dbw->update( 'cur', $fields, array( 'cur_namespace' => $ns, 'cur_title' => $dbkey ), $fname );
2035                 } else {
2036                         # Insert new article
2037                         $fields['cur_is_new'] = 1;
2038                         $fields['cur_namespace'] = $ns;
2039                         $fields['cur_title'] = $dbkey;
2040                         $fields['cur_random'] = $rand = wfRandom();
2041                         $dbw->insert( 'cur', $fields, $fname );
2042                 }
2043 */
2044                 wfProfileOut( $fname );
2045         }
2046
2047         /**
2048          * Used to increment the view counter
2049          *
2050          * @static
2051          * @param integer $id article id
2052          */
2053         function incViewCount( $id ) {
2054                 $id = intval( $id );
2055                 global $wgHitcounterUpdateFreq;
2056
2057                 $dbw =& wfGetDB( DB_MASTER );
2058                 $pageTable = $dbw->tableName( 'page' );
2059                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
2060                 $acchitsTable = $dbw->tableName( 'acchits' );
2061
2062                 if( $wgHitcounterUpdateFreq <= 1 ){ //
2063                         $dbw->query( "UPDATE $pageTable SET page_counter = page_counter + 1 WHERE page_id = $id" );
2064                         return;
2065                 }
2066
2067                 # Not important enough to warrant an error page in case of failure
2068                 $oldignore = $dbw->ignoreErrors( true );
2069
2070                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2071
2072                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2073                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2074                         # Most of the time (or on SQL errors), skip row count check
2075                         $dbw->ignoreErrors( $oldignore );
2076                         return;
2077                 }
2078
2079                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2080                 $row = $dbw->fetchObject( $res );
2081                 $rown = intval( $row->n );
2082                 if( $rown >= $wgHitcounterUpdateFreq ){
2083                         wfProfileIn( 'Article::incViewCount-collect' );
2084                         $old_user_abort = ignore_user_abort( true );
2085
2086                         $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2087                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable TYPE=HEAP ".
2088                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2089                                 'GROUP BY hc_id');
2090                         $dbw->query("DELETE FROM $hitcounterTable");
2091                         $dbw->query('UNLOCK TABLES');
2092                         $dbw->query("UPDATE $curTable,$acchitsTable SET cur_counter=cur_counter + hc_n ".
2093                                 'WHERE cur_id = hc_id');
2094                         $dbw->query("DROP TABLE $acchitsTable");
2095
2096                         ignore_user_abort( $old_user_abort );
2097                         wfProfileOut( 'Article::incViewCount-collect' );
2098                 }
2099                 $dbw->ignoreErrors( $oldignore );
2100         }
2101
2102         /**#@+
2103          * The onArticle*() functions are supposed to be a kind of hooks
2104          * which should be called whenever any of the specified actions
2105          * are done.
2106          *
2107          * This is a good place to put code to clear caches, for instance.
2108          *
2109          * This is called on page move and undelete, as well as edit
2110          * @static
2111          * @param $title_obj a title object
2112          */
2113
2114         function onArticleCreate($title_obj) {
2115                 global $wgUseSquid, $wgDeferredUpdateList;
2116
2117                 $titles = $title_obj->getBrokenLinksTo();
2118
2119                 # Purge squid
2120                 if ( $wgUseSquid ) {
2121                         $urls = $title_obj->getSquidURLs();
2122                         foreach ( $titles as $linkTitle ) {
2123                                 $urls[] = $linkTitle->getInternalURL();
2124                         }
2125                         $u = new SquidUpdate( $urls );
2126                         array_push( $wgDeferredUpdateList, $u );
2127                 }
2128
2129                 # Clear persistent link cache
2130                 LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
2131         }
2132
2133         function onArticleDelete($title_obj) {
2134                 LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
2135         }
2136         function onArticleEdit($title_obj) {
2137                 LinkCache::linksccClearPage( $title_obj->getArticleID() );
2138         }
2139         /**#@-*/
2140
2141         /**
2142          * Info about this page
2143          */
2144         function info() {
2145                 global $wgUser, $wgTitle, $wgOut, $wgAllowPageInfo;
2146                 $fname = 'Article::info';
2147
2148                 if ( !$wgAllowPageInfo ) {
2149                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
2150                         return;
2151                 }
2152
2153                 $dbr =& $this->getDB();
2154
2155                 $basenamespace = $wgTitle->getNamespace() & (~1);
2156                 $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace );
2157                 $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace );
2158                 $wl_clause  = array( 'wl_title' => $wgTitle->getDBkey(), 'wl_namespace' => $basenamespace );
2159                 $fullTitle = $wgTitle->makeName($basenamespace, $wgTitle->getDBKey());
2160                 $wgOut->setPagetitle(  $fullTitle );
2161                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
2162
2163                 # first, see if the page exists at all.
2164                 $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2165                 if ($exists < 1) {
2166                         $wgOut->addHTML( wfMsg('noarticletext') );
2167                 } else {
2168                         $numwatchers = $dbr->selectField( 'watchlist', 'COUNT(*)', $wl_clause, $fname,
2169                                 $this->getSelectOptions() );
2170                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $numwatchers) . '</li>' );
2171                         $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2172                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $old + 1) . '</li>');
2173
2174                         # to find number of distinct authors, we need to do some
2175                         # funny stuff because of the cur/old table split:
2176                         # - first, find the name of the 'cur' author
2177                         # - then, find the number of *other* authors in 'old'
2178
2179                         # find 'cur' author
2180                         $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2181                                 $this->getSelectOptions() );
2182
2183                         # find number of 'old' authors excluding 'cur' author
2184                         $authors = $dbr->selectField( 'old', 'COUNT(DISTINCT old_user_text)',
2185                                 $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ), $fname,
2186                                 $this->getSelectOptions() ) + 1;
2187
2188                         # now for the Talk page ...
2189                         $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace+1 );
2190                         $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace+1 );
2191
2192                         # does it exist?
2193                         $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2194
2195                         # number of edits
2196                         if ($exists > 0) {
2197                                 $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2198                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $old + 1) . '</li>');
2199                         }
2200                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $authors) . '</li>' );
2201
2202                         # number of authors
2203                         if ($exists > 0) {
2204                                 $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2205                                         $this->getSelectOptions() );
2206                                 $authors = $dbr->selectField( 'cur', 'COUNT(DISTINCT old_user_text)',
2207                                         $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ),
2208                                         $fname, $this->getSelectOptions() );
2209
2210                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $authors) . '</li></ul>' );
2211                         }
2212                 }
2213         }
2214 }
2215
2216 /**
2217  * Check whether an article is a stub
2218  *
2219  * @public
2220  * @param integer $articleID    ID of the article that is to be checked
2221  */
2222 function wfArticleIsStub( $articleID ) {
2223         global $wgUser;
2224         $fname = 'wfArticleIsStub';
2225
2226         $threshold = $wgUser->getOption('stubthreshold') ;
2227         if ( $threshold > 0 ) {
2228                 $dbr =& wfGetDB( DB_SLAVE );
2229                 $s = $dbr->selectRow( array('page', 'text'),
2230                         array( 'LENGTH(old_text) AS len', 'page_namespace', 'page_is_redirect' ),
2231                         array( 'page_id' => $articleID, "page.page_latest=text.old_id" ),
2232                         $fname ) ;
2233                 if ( $s == false OR $s->page_is_redirect OR $s->page_namespace != 0 ) {
2234                         return false;
2235                 }
2236                 $size = $s->len;
2237                 return ( $size < $threshold );
2238         }
2239         return false;
2240 }
2241
2242 ?>