includes/Article.php

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