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          * If the given revision is newer than the currently set page_latest,
 780          * update the page record. Otherwise, do nothing.
 781          *
 782          * @param Database $dbw
 783          * @param Revision $revision
 784          */
 785         function updateIfNewerOn( &$dbw, $revision ) {
 786                 $fname = 'Article::updateIfNewerOn';
 787                 wfProfileIn( $fname );
 788
 789                 $row = $dbw->selectRow(
 790                         array( 'revision', 'page' ),
 791                         array( 'rev_id', 'rev_timestamp' ),
 792                         array(
 793                                 'page_id' => $this->getId(),
 794                                 'page_latest=rev_id' ),
 795                         $fname );
 796                 if( $row ) {
 797                         if( $row->rev_timestamp >= $revision->getTimestamp() ) {
 798                                 wfProfileOut( $fname );
 799                                 return false;
 800                         }
 801                         $prev = $row->rev_id;
 802                 } else {
 803                         # No or missing previous revision; mark the page as new
 804                         $prev = 0;
 805                 }
 806
 807                 $ret = $this->updateRevisionOn( $dbw, $revision->getId(), $revision->getText(), $prev );
 808                 wfProfileOut( $fname );
 809                 return $ret;
 810         }
 811
 812         /**
 813          * Theoretically we could defer these whole insert and update
 814          * functions for after display, but that's taking a big leap
 815          * of faith, and we want to be able to report database
 816          * errors at some point.
 817          * @private
 818          */
 819         function insertNewArticle( $text, $summary, $isminor, $watchthis ) {
 820                 global $wgOut, $wgUser;
 821                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 822
 823                 $fname = 'Article::insertNewArticle';
 824
 825                 $this->mCountAdjustment = $this->isCountable( $text );
 826
 827                 $ns = $this->mTitle->getNamespace();
 828                 $ttl = $this->mTitle->getDBkey();
 829                 $text = $this->preSaveTransform( $text );
 830                 $isminor = ( $isminor && $wgUser->isLoggedIn() ) ? 1 : 0;
 831
 832                 $dbw =& wfGetDB( DB_MASTER );
 833
 834                 # Add the page record; stake our claim on this title!
 835                 $newid = $this->insertOn( $dbw );
 836
 837                 # Save the revision text...
 838                 $revision = new Revision( array(
 839                         'page'       => $newid,
 840                         'comment'    => $summary,
 841                         'minor_edit' => $isminor,
 842                         'text'       => $text
 843                         ) );
 844                 $revisionId = $revision->insertOn( $dbw );
 845
 846                 $this->mTitle->resetArticleID( $newid );
 847
 848                 # Update the page record with revision data
 849                 $this->updateRevisionOn( $dbw, $revisionId, $text, 0 );
 850
 851                 Article::onArticleCreate( $this->mTitle );
 852                 RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary );
 853
 854                 if ($watchthis) {
 855                         if(!$this->mTitle->userIsWatching()) $this->watch();
 856                 } else {
 857                         if ( $this->mTitle->userIsWatching() ) {
 858                                 $this->unwatch();
 859                         }
 860                 }
 861
 862                 # The talk page isn't in the regular link tables, so we need to update manually:
 863                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 864                 $dbw->update( 'page',
 865                         array( 'page_touched' => $dbw->timestamp($now) ),
 866                         array( 'page_namespace' => $talkns,
 867                                'page_title' => $ttl ),
 868                         $fname );
 869
 870                 # standard deferred updates
 871                 $this->editUpdates( $text, $summary, $isminor, $now );
 872
 873                 $oldid = 0; # new article
 874                 $this->showArticle( $text, wfMsg( 'newarticle' ), false, $isminor, $now, $summary, $oldid );
 875         }
 876
 877         /**
 878          * Fetch and uncompress the text for a given revision.
 879          * Can ask by rev_id number or timestamp (set $field)
 880          */
 881         function fetchRevisionText( $revId = null, $field = 'rev_id' ) {
 882                 $fname = 'Article::fetchRevisionText';
 883                 $dbw =& wfGetDB( DB_MASTER );
 884                 if( $revId ) {
 885                         $rev = $dbw->addQuotes( $revId );
 886                 } else {
 887                         $rev = 'page_latest';
 888                 }
 889                 $result = $dbw->query(
 890                         sprintf( "SELECT old_text, old_flags
 891                                 FROM %s,%s,%s
 892                                 WHERE old_id=rev_id AND rev_page=page_id AND page_id=%d
 893                                 AND %s=%s",
 894                                 $dbw->tableName( 'page' ),
 895                                 $dbw->tableName( 'revision' ),
 896                                 $dbw->tableName( 'text' ),
 897                                 IntVal( $this->mTitle->getArticleId() ),
 898                                 $field,
 899                                 $rev ),
 900                         $fname );
 901                 $obj = $dbw->fetchObject( $result );
 902                 $dbw->freeResult( $result );
 903                 $oldtext = Revision::getRevisionText( $obj );
 904                 return $oldtext;
 905         }
 906
 907         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = '', $edittime = NULL) {
 908                 $fname = 'Article::getTextOfLastEditWithSectionReplacedOrAdded';
 909                 if( is_null( $edittime ) ) {
 910                         $oldtext = $this->fetchRevisionText();
 911                 } else {
 912                         $oldtext = $this->fetchRevisionText( $edittime, 'rev_timestamp' );
 913                 }
 914                 if ($section != '') {
 915                         if($section=='new') {
 916                                 if($summary) $subject="== {$summary} ==\n\n";
 917                                 $text=$oldtext."\n\n".$subject.$text;
 918                         } else {
 919
 920                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 921                                 # comments to be stripped as well)
 922                                 $striparray=array();
 923                                 $parser=new Parser();
 924                                 $parser->mOutputType=OT_WIKI;
 925                                 $oldtext=$parser->strip($oldtext, $striparray, true);
 926
 927                                 # now that we can be sure that no pseudo-sections are in the source,
 928                                 # split it up
 929                                 # Unfortunately we can't simply do a preg_replace because that might
 930                                 # replace the wrong section, so we have to use the section counter instead
 931                                 $secs=preg_split('/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 932                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 933                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 934
 935                                 # section 0 is top (intro) section
 936                                 if($section!=0) {
 937
 938                                         # headline of old section - we need to go through this section
 939                                         # to determine if there are any subsections that now need to
 940                                         # be erased, as the mother section has been replaced with
 941                                         # the text of all subsections.
 942                                         $headline=$secs[$section*2-1];
 943                                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 944                                         $hlevel=$matches[1];
 945
 946                                         # determine headline level for wikimarkup headings
 947                                         if(strpos($hlevel,'=')!==false) {
 948                                                 $hlevel=strlen($hlevel);
 949                                         }
 950
 951                                         $secs[$section*2-1]=''; // erase old headline
 952                                         $count=$section+1;
 953                                         $break=false;
 954                                         while(!empty($secs[$count*2-1]) && !$break) {
 955
 956                                                 $subheadline=$secs[$count*2-1];
 957                                                 preg_match(
 958                                                  '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 959                                                 $subhlevel=$matches[1];
 960                                                 if(strpos($subhlevel,'=')!==false) {
 961                                                         $subhlevel=strlen($subhlevel);
 962                                                 }
 963                                                 if($subhlevel > $hlevel) {
 964                                                         // erase old subsections
 965                                                         $secs[$count*2-1]='';
 966                                                         $secs[$count*2]='';
 967                                                 }
 968                                                 if($subhlevel <= $hlevel) {
 969                                                         $break=true;
 970                                                 }
 971                                                 $count++;
 972
 973                                         }
 974
 975                                 }
 976                                 $text=join('',$secs);
 977                                 # reinsert the stuff that we stripped out earlier
 978                                 $text=$parser->unstrip($text,$striparray);
 979                                 $text=$parser->unstripNoWiki($text,$striparray);
 980                         }
 981
 982                 }
 983                 return $text;
 984         }
 985
 986         /**
 987          * Change an existing article. Puts the previous version back into the old table, updates RC
 988          * and all necessary caches, mostly via the deferred update array.
 989          *
 990          * It is possible to call this function from a command-line script, but note that you should
 991          * first set $wgUser, and clean up $wgDeferredUpdates after each edit.
 992          */
 993         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
 994                 global $wgOut, $wgUser;
 995                 global $wgDBtransactions, $wgMwRedir;
 996                 global $wgUseSquid, $wgInternalServer, $wgPostCommitUpdateList;
 997
 998                 $fname = 'Article::updateArticle';
 999                 $good = true;
1000
1001                 $isminor = ( $minor && $wgUser->isLoggedIn() );
1002                 if ( $this->isRedirect( $text ) ) {
1003                         # Remove all content but redirect
1004                         # This could be done by reconstructing the redirect from a title given by
1005                         # Title::newFromRedirect(), but then we wouldn't know which synonym the user
1006                         # wants to see
1007                         if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ')[^\\n]+)/i', $text, $m ) ) {
1008                                 $redir = 1;
1009                                 $text = $m[1] . "\n";
1010                         }
1011                 }
1012                 else { $redir = 0; }
1013
1014                 $text = $this->preSaveTransform( $text );
1015                 $dbw =& wfGetDB( DB_MASTER );
1016
1017                 # Update article, but only if changed.
1018
1019                 # It's important that we either rollback or complete, otherwise an attacker could
1020                 # overwrite cur entries by sending precisely timed user aborts. Random bored users
1021                 # could conceivably have the same effect, especially if cur is locked for long periods.
1022                 if( $wgDBtransactions ) {
1023                         $dbw->query( 'BEGIN', $fname );
1024                 } else {
1025                         $userAbort = ignore_user_abort( true );
1026                 }
1027
1028                 $oldtext = $this->getContent( true );
1029
1030                 if ( 0 != strcmp( $text, $oldtext ) ) {
1031                         $this->mCountAdjustment = $this->isCountable( $text )
1032                           - $this->isCountable( $oldtext );
1033                         $now = wfTimestampNow();
1034
1035                         $lastRevision = $dbw->selectField(
1036                                 'page', 'page_latest', array( 'page_id' => $this->getId() ) );
1037
1038                         $revision = new Revision( array(
1039                                 'page'       => $this->getId(),
1040                                 'comment'    => $summary,
1041                                 'minor_edit' => $isminor,
1042                                 'text'       => $text
1043                                 ) );
1044                         $revisionId = $revision->insertOn( $dbw );
1045
1046                         # Update page
1047                         $ok = $this->updateRevisionOn( $dbw, $revisionId, $text, $lastRevision );
1048
1049                         if( !$ok ) {
1050                                 /* Belated edit conflict! Run away!! */
1051                                 $good = false;
1052                         } else {
1053                                 # Update recentchanges and purge cache and whatnot
1054                                 $bot = (int)($wgUser->isBot() || $forceBot);
1055                                 RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
1056                                         $lastRevision, $this->getTimestamp(), $bot );
1057                                 Article::onArticleEdit( $this->mTitle );
1058                         }
1059                 }
1060
1061                 if( $wgDBtransactions ) {
1062                         $dbw->query( 'COMMIT', $fname );
1063                 } else {
1064                         ignore_user_abort( $userAbort );
1065                 }
1066
1067                 if ( $good ) {
1068                         if ($watchthis) {
1069                                 if (!$this->mTitle->userIsWatching()) $this->watch();
1070                         } else {
1071                                 if ( $this->mTitle->userIsWatching() ) {
1072                                         $this->unwatch();
1073                                 }
1074                         }
1075                         # standard deferred updates
1076                         $this->editUpdates( $text, $summary, $minor, $now );
1077
1078
1079                         $urls = array();
1080                         # Template namespace
1081                         # Purge all articles linking here
1082                         if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
1083                                 $titles = $this->mTitle->getLinksTo();
1084                                 Title::touchArray( $titles );
1085                                 if ( $wgUseSquid ) {
1086                                                 foreach ( $titles as $title ) {
1087                                                         $urls[] = $title->getInternalURL();
1088                                                 }
1089                                 }
1090                         }
1091
1092                         # Squid updates
1093                         if ( $wgUseSquid ) {
1094                                 $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
1095                                 $u = new SquidUpdate( $urls );
1096                                 array_push( $wgPostCommitUpdateList, $u );
1097                         }
1098
1099                         $this->showArticle( $text, wfMsg( 'updated' ), $sectionanchor, $me2, $now, $summary, $lastRevision );
1100                 }
1101                 return $good;
1102         }
1103
1104         /**
1105          * After we've either updated or inserted the article, update
1106          * the link tables and redirect to the new page.
1107          */
1108         function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid ) {
1109                 global $wgOut, $wgUser, $wgLinkCache, $wgEnotif;
1110
1111                 $wgLinkCache = new LinkCache();
1112                 # Select for update
1113                 $wgLinkCache->forUpdate( true );
1114
1115                 # Get old version of link table to allow incremental link updates
1116                 $wgLinkCache->preFill( $this->mTitle );
1117                 $wgLinkCache->clear();
1118
1119                 # Parse the text and replace links with placeholders
1120                 $wgOut = new OutputPage();
1121                 $wgOut->addWikiText( $text );
1122
1123                 # Look up the links in the DB and add them to the link cache
1124                 $wgOut->transformBuffer( RLH_FOR_UPDATE );
1125
1126                 if( $this->isRedirect( $text ) )
1127                         $r = 'redirect=no';
1128                 else
1129                         $r = '';
1130                 $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
1131
1132                 # this call would better fit into RecentChange::notifyEdit and RecentChange::notifyNew .
1133                 # this will be improved later (to-do)
1134
1135                 include_once( "UserMailer.php" );
1136                 $wgEnotif = new EmailNotification ();
1137                 $wgEnotif->NotifyOnPageChange( $wgUser->getID(), $this->mTitle->getDBkey(), $this->mTitle->getNamespace(),$now, $summary, $me2, $oldid );
1138         }
1139
1140         /**
1141          * Mark this particular edit as patrolled
1142          */
1143         function markpatrolled() {
1144                 global $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgUseRCPatrol, $wgUser;
1145                 $wgOut->setRobotpolicy( 'noindex,follow' );
1146
1147                 if ( !$wgUseRCPatrol )
1148                 {
1149                         $wgOut->errorpage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1150                         return;
1151                 }
1152                 if ( $wgUser->isAnon() )
1153                 {
1154                         $wgOut->loginToUse();
1155                         return;
1156                 }
1157                 if ( $wgOnlySysopsCanPatrol && !$wgUser->isAllowed('patrol') )
1158                 {
1159                         $wgOut->sysopRequired();
1160                         return;
1161                 }
1162                 $rcid = $wgRequest->getVal( 'rcid' );
1163                 if ( !is_null ( $rcid ) )
1164                 {
1165                         RecentChange::markPatrolled( $rcid );
1166                         $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
1167                         $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
1168
1169                         $rcTitle = Title::makeTitle( NS_SPECIAL, 'Recentchanges' );
1170                         $wgOut->returnToMain( false, $rcTitle->getPrefixedText() );
1171                 }
1172                 else
1173                 {
1174                         $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1175                 }
1176         }
1177
1178
1179         /**
1180          * Add this page to $wgUser's watchlist
1181          */
1182
1183         function watch() {
1184
1185                 global $wgUser, $wgOut;
1186
1187                 if ( $wgUser->isAnon() ) {
1188                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1189                         return;
1190                 }
1191                 if ( wfReadOnly() ) {
1192                         $wgOut->readOnlyPage();
1193                         return;
1194                 }
1195
1196                 if (wfRunHooks('WatchArticle', $wgUser, $this)) {
1197
1198                         $wgUser->addWatch( $this->mTitle );
1199                         $wgUser->saveSettings();
1200
1201                         wfRunHooks('WatchArticleComplete', $wgUser, $this);
1202
1203                         $wgOut->setPagetitle( wfMsg( 'addedwatch' ) );
1204                         $wgOut->setRobotpolicy( 'noindex,follow' );
1205
1206                         $link = $this->mTitle->getPrefixedText();
1207                         $text = wfMsg( 'addedwatchtext', $link );
1208                         $wgOut->addWikiText( $text );
1209                 }
1210
1211                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1212         }
1213
1214         /**
1215          * Stop watching a page
1216          */
1217
1218         function unwatch() {
1219
1220                 global $wgUser, $wgOut;
1221
1222                 if ( $wgUser->isAnon() ) {
1223                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1224                         return;
1225                 }
1226                 if ( wfReadOnly() ) {
1227                         $wgOut->readOnlyPage();
1228                         return;
1229                 }
1230
1231                 if (wfRunHooks('UnwatchArticle', $wgUser, $this)) {
1232
1233                         $wgUser->removeWatch( $this->mTitle );
1234                         $wgUser->saveSettings();
1235
1236                         wfRunHooks('UnwatchArticleComplete', $wgUser, $this);
1237
1238                         $wgOut->setPagetitle( wfMsg( 'removedwatch' ) );
1239                         $wgOut->setRobotpolicy( 'noindex,follow' );
1240
1241                         $link = $this->mTitle->getPrefixedText();
1242                         $text = wfMsg( 'removedwatchtext', $link );
1243                         $wgOut->addWikiText( $text );
1244                 }
1245
1246                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1247         }
1248
1249         /**
1250          * protect a page
1251          */
1252         function protect( $limit = 'sysop' ) {
1253                 global $wgUser, $wgOut, $wgRequest;
1254
1255                 if ( ! $wgUser->isAllowed('protect') ) {
1256                         $wgOut->sysopRequired();
1257                         return;
1258                 }
1259                 if ( wfReadOnly() ) {
1260                         $wgOut->readOnlyPage();
1261                         return;
1262                 }
1263                 $id = $this->mTitle->getArticleID();
1264                 if ( 0 == $id ) {
1265                         $wgOut->fatalError( wfMsg( 'badarticleerror' ) );
1266                         return;
1267                 }
1268
1269                 $confirm = $wgRequest->wasPosted() &&
1270                         $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
1271                 $moveonly = $wgRequest->getBool( 'wpMoveOnly' );
1272                 $reason = $wgRequest->getText( 'wpReasonProtect' );
1273
1274                 if ( $confirm ) {
1275                         $dbw =& wfGetDB( DB_MASTER );
1276                         $dbw->update( 'page',
1277                                 array( /* SET */
1278                                         'page_touched' => $dbw->timestamp(),
1279                                         'page_restrictions' => (string)$limit
1280                                 ), array( /* WHERE */
1281                                         'page_id' => $id
1282                                 ), 'Article::protect'
1283                         );
1284
1285                         $restrictions = "move=" . $limit;
1286                         if( !$moveonly ) {
1287                                 $restrictions .= ":edit=" . $limit;
1288                         }
1289                         if (wfRunHooks('ArticleProtect', $this, $wgUser, $limit == 'sysop', $reason, $moveonly)) {
1290
1291                                 $dbw =& wfGetDB( DB_MASTER );
1292                                 $dbw->update( 'page',
1293                                                           array( /* SET */
1294                                                                          'page_touched' => $dbw->timestamp(),
1295                                                                          'page_restrictions' => $restrictions
1296                                                                          ), array( /* WHERE */
1297                                                                                            'page_id' => $id
1298                                                                                            ), 'Article::protect'
1299                                                           );
1300
1301                                 wfRunHooks('ArticleProtectComplete', $this, $wgUser, $limit == 'sysop', $reason, $moveonly);
1302
1303                                 $log = new LogPage( 'protect' );
1304                                 if ( $limit === '' ) {
1305                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1306                                 } else {
1307                                         $log->addEntry( 'protect', $this->mTitle, $reason );
1308                                 }
1309                                 $wgOut->redirect( $this->mTitle->getFullURL() );
1310                         }
1311                         return;
1312                 } else {
1313                         $reason = htmlspecialchars( wfMsg( 'protectreason' ) );
1314                         return $this->confirmProtect( '', $reason, $limit );
1315                 }
1316         }
1317
1318         /**
1319          * Output protection confirmation dialog
1320          */
1321         function confirmProtect( $par, $reason, $limit = 'sysop'  ) {
1322                 global $wgOut, $wgUser;
1323
1324                 wfDebug( "Article::confirmProtect\n" );
1325
1326                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1327                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1328
1329                 $check = '';
1330                 $protcom = '';
1331                 $moveonly = '';
1332
1333                 if ( $limit === '' ) {
1334                         $wgOut->setPageTitle( wfMsg( 'confirmunprotect' ) );
1335                         $wgOut->setSubtitle( wfMsg( 'unprotectsub', $sub ) );
1336                         $wgOut->addWikiText( wfMsg( 'confirmunprotecttext' ) );
1337                         $protcom = htmlspecialchars( wfMsg( 'unprotectcomment' ) );
1338                         $formaction = $this->mTitle->escapeLocalURL( 'action=unprotect' . $par );
1339                 } else {
1340                         $wgOut->setPageTitle( wfMsg( 'confirmprotect' ) );
1341                         $wgOut->setSubtitle( wfMsg( 'protectsub', $sub ) );
1342                         $wgOut->addWikiText( wfMsg( 'confirmprotecttext' ) );
1343                         $moveonly = htmlspecialchars( wfMsg( 'protectmoveonly' ) );
1344                         $protcom = htmlspecialchars( wfMsg( 'protectcomment' ) );
1345                         $formaction = $this->mTitle->escapeLocalURL( 'action=protect' . $par );
1346                 }
1347
1348                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1349                 $token = htmlspecialchars( $wgUser->editToken() );
1350
1351                 $wgOut->addHTML( "
1352 <form id='protectconfirm' method='post' action=\"{$formaction}\">
1353         <table border='0'>
1354                 <tr>
1355                         <td align='right'>
1356                                 <label for='wpReasonProtect'>{$protcom}:</label>
1357                         </td>
1358                         <td align='left'>
1359                                 <input type='text' size='60' name='wpReasonProtect' id='wpReasonProtect' value=\"" . htmlspecialchars( $reason ) . "\" />
1360                         </td>
1361                 </tr>
1362                 <tr>
1363                         <td>&nbsp;</td>
1364                 </tr>" );
1365                 if($moveonly != '') {
1366                         $wgOut->AddHTML( "
1367                 <tr>
1368                         <td align='right'>
1369                                 <input type='checkbox' name='wpMoveOnly' value='1' id='wpMoveOnly' />
1370                         </td>
1371                         <td>
1372                                 <label for='wpMoveOnly'>{$moveonly}</label>
1373                         </td>
1374                 </tr> " );
1375                 }
1376                 $wgOut->addHTML( "
1377                 <tr>
1378                         <td>&nbsp;</td>
1379                         <td>
1380                                 <input type='submit' name='wpConfirmProtectB' value=\"{$confirm}\" />
1381                         </td>
1382                 </tr>
1383         </table>
1384         <input type='hidden' name='wpEditToken' value=\"{$token}\" />
1385 </form>\n" );
1386
1387                 $wgOut->returnToMain( false );
1388         }
1389
1390         /**
1391          * Unprotect the pages
1392          */
1393         function unprotect() {
1394                 return $this->protect( '' );
1395         }
1396
1397         /*
1398          * UI entry point for page deletion
1399          */
1400         function delete() {
1401                 global $wgUser, $wgOut, $wgMessageCache, $wgRequest;
1402                 $fname = 'Article::delete';
1403                 $confirm = $wgRequest->wasPosted() &&
1404                         $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
1405                 $reason = $wgRequest->getText( 'wpReason' );
1406
1407                 # This code desperately needs to be totally rewritten
1408
1409                 # Check permissions
1410                 if ( ( ! $wgUser->isAllowed('delete') ) ) {
1411                         $wgOut->sysopRequired();
1412                         return;
1413                 }
1414                 if ( wfReadOnly() ) {
1415                         $wgOut->readOnlyPage();
1416                         return;
1417                 }
1418
1419                 # Better double-check that it hasn't been deleted yet!
1420                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1421                 if ( ( '' == trim( $this->mTitle->getText() ) )
1422                   or ( $this->mTitle->getArticleId() == 0 ) ) {
1423                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1424                         return;
1425                 }
1426
1427                 if ( $confirm ) {
1428                         $this->doDelete( $reason );
1429                         return;
1430                 }
1431
1432                 # determine whether this page has earlier revisions
1433                 # and insert a warning if it does
1434                 # we select the text because it might be useful below
1435                 $dbr =& $this->getDB();
1436                 $ns = $this->mTitle->getNamespace();
1437                 $title = $this->mTitle->getDBkey();
1438                 $revisions = $dbr->select( array( 'page', 'revision' ),
1439                         array( 'rev_id' ),
1440                         array(
1441                                 'page_namespace' => $ns,
1442                                 'page_title' => $title,
1443                                 'rev_page = page_id'
1444                         ), $fname, $this->getSelectOptions( array( 'ORDER BY' => 'rev_timestamp DESC' ) )
1445                 );
1446
1447                 if( $dbr->numRows( $revisions ) > 1 && !$confirm ) {
1448                         $skin=$wgUser->getSkin();
1449                         $wgOut->addHTML('<b>'.wfMsg('historywarning'));
1450                         $wgOut->addHTML( $skin->historyLink() .'</b>');
1451                 }
1452
1453                 # Fetch cur_text
1454                 $s = $dbr->selectRow( array( 'page', 'text' ),
1455                         array( 'old_text' ),
1456                         array(
1457                                 'page_namespace' => $ns,
1458                                 'page_title' => $title,
1459                                 'page_latest = old_id'
1460                         ), $fname, $this->getSelectOptions()
1461                 );
1462
1463                 if( $s !== false ) {
1464                         # if this is a mini-text, we can paste part of it into the deletion reason
1465
1466                         #if this is empty, an earlier revision may contain "useful" text
1467                         $blanked = false;
1468                         if($s->old_text != '') {
1469                                 $text=$s->old_text;
1470                         } else {
1471                                 if($old) { # TODO
1472                                         $text = Revision::getRevisionText( $old );
1473                                         $blanked = true;
1474                                 }
1475
1476                         }
1477
1478                         $length=strlen($text);
1479
1480                         # this should not happen, since it is not possible to store an empty, new
1481                         # page. Let's insert a standard text in case it does, though
1482                         if($length == 0 && $reason === '') {
1483                                 $reason = wfMsg('exblank');
1484                         }
1485
1486                         if($length < 500 && $reason === '') {
1487
1488                                 # comment field=255, let's grep the first 150 to have some user
1489                                 # space left
1490                                 $text=substr($text,0,150);
1491                                 # let's strip out newlines and HTML tags
1492                                 $text=preg_replace('/\"/',"'",$text);
1493                                 $text=preg_replace('/\</','&lt;',$text);
1494                                 $text=preg_replace('/\>/','&gt;',$text);
1495                                 $text=preg_replace("/[\n\r]/",'',$text);
1496                                 if(!$blanked) {
1497                                         $reason=wfMsg('excontent'). " '".$text;
1498                                 } else {
1499                                         $reason=wfMsg('exbeforeblank') . " '".$text;
1500                                 }
1501                                 if($length>150) { $reason .= '...'; } # we've only pasted part of the text
1502                                 $reason.="'";
1503                         }
1504                 }
1505
1506                 return $this->confirmDelete( '', $reason );
1507         }
1508
1509         /**
1510          * Output deletion confirmation dialog
1511          */
1512         function confirmDelete( $par, $reason ) {
1513                 global $wgOut, $wgUser;
1514
1515                 wfDebug( "Article::confirmDelete\n" );
1516
1517                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1518                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1519                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1520                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1521
1522                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1523
1524                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1525                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1526                 $token = htmlspecialchars( $wgUser->editToken() );
1527
1528                 $wgOut->addHTML( "
1529 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1530         <table border='0'>
1531                 <tr>
1532                         <td align='right'>
1533                                 <label for='wpReason'>{$delcom}:</label>
1534                         </td>
1535                         <td align='left'>
1536                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1537                         </td>
1538                 </tr>
1539                 <tr>
1540                         <td>&nbsp;</td>
1541                 </tr>
1542                 <tr>
1543                         <td>&nbsp;</td>
1544                         <td>
1545                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1546                         </td>
1547                 </tr>
1548         </table>
1549         <input type='hidden' name='wpEditToken' value=\"{$token}\" />
1550 </form>\n" );
1551
1552                 $wgOut->returnToMain( false );
1553         }
1554
1555
1556         /**
1557          * Perform a deletion and output success or failure messages
1558          */
1559         function doDelete( $reason ) {
1560                 global $wgOut, $wgUser, $wgContLang;
1561                 $fname = 'Article::doDelete';
1562                 wfDebug( $fname."\n" );
1563
1564                 if (wfRunHooks('ArticleDelete', $this, $wgUser, $reason)) {
1565                         if ( $this->doDeleteArticle( $reason ) ) {
1566                                 $deleted = $this->mTitle->getPrefixedText();
1567
1568                                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1569                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1570
1571                                 $sk = $wgUser->getSkin();
1572                                 $loglink = $sk->makeKnownLink( $wgContLang->getNsText( NS_PROJECT ) .
1573                                                                                            ':' . wfMsgForContent( 'dellogpage' ),
1574                                                                                            wfMsg( 'deletionlog' ) );
1575
1576                                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
1577
1578                                 $wgOut->addHTML( '<p>' . $text . "</p>\n" );
1579                                 $wgOut->returnToMain( false );
1580                                 wfRunHooks('ArticleDeleteComplete', $this, $wgUser, $reason);
1581                         } else {
1582                                 $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1583                         }
1584                 }
1585         }
1586
1587         /**
1588          * Back-end article deletion
1589          * Deletes the article with database consistency, writes logs, purges caches
1590          * Returns success
1591          */
1592         function doDeleteArticle( $reason ) {
1593                 global $wgUser;
1594                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer, $wgPostCommitUpdateList;
1595
1596                 $fname = 'Article::doDeleteArticle';
1597                 wfDebug( $fname."\n" );
1598
1599                 $dbw =& wfGetDB( DB_MASTER );
1600                 $ns = $this->mTitle->getNamespace();
1601                 $t = $this->mTitle->getDBkey();
1602                 $id = $this->mTitle->getArticleID();
1603
1604                 if ( $t == '' || $id == 0 ) {
1605                         return false;
1606                 }
1607
1608                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
1609                 array_push( $wgDeferredUpdateList, $u );
1610
1611                 $linksTo = $this->mTitle->getLinksTo();
1612
1613                 # Squid purging
1614                 if ( $wgUseSquid ) {
1615                         $urls = array(
1616                                 $this->mTitle->getInternalURL(),
1617                                 $this->mTitle->getInternalURL( 'history' )
1618                         );
1619                         foreach ( $linksTo as $linkTo ) {
1620                                 $urls[] = $linkTo->getInternalURL();
1621                         }
1622
1623                         $u = new SquidUpdate( $urls );
1624                         array_push( $wgPostCommitUpdateList, $u );
1625
1626                 }
1627
1628                 # Client and file cache invalidation
1629                 Title::touchArray( $linksTo );
1630
1631                 # Move article and history to the "archive" table
1632
1633                 $dbw->insertSelect( 'archive', array( 'page','revision', 'text' ),
1634                         array(
1635                                 'ar_namespace'  => 'page_namespace',
1636                                 'ar_title'      => 'page_title',
1637                                 'ar_text'       => 'old_text',
1638                                 'ar_comment'    => 'rev_comment',
1639                                 'ar_user'       => 'rev_user',
1640                                 'ar_user_text'  => 'rev_user_text',
1641                                 'ar_timestamp'  => 'rev_timestamp',
1642                                 'ar_minor_edit' => 'rev_minor_edit',
1643                                 'ar_flags'      => 'old_flags',
1644                                 'ar_rev_id'     => 'rev_id',
1645                         ), array(
1646                                 'page_namespace' => $ns,
1647                                 'page_title' => $t,
1648                                 'page_id = rev_page AND old_id = rev_id'
1649                         ), $fname
1650                 );
1651
1652                 # Now that it's safely backed up, delete it
1653
1654                 $dbw->deleteJoin( 'text', 'revision', 'old_id', 'rev_id', array( "rev_page = {$id}" ), $fname );
1655                 $dbw->delete( 'revision', array( 'rev_page' => $id ), $fname );
1656                 $dbw->delete( 'page', array( 'page_id' => $id ), $fname);
1657
1658                 $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), $fname );
1659
1660                 # Finally, clean up the link tables
1661                 $t = $this->mTitle->getPrefixedDBkey();
1662
1663                 Article::onArticleDelete( $this->mTitle );
1664
1665                 # Insert broken links
1666                 $brokenLinks = array();
1667                 foreach ( $linksTo as $titleObj ) {
1668                         # Get article ID. Efficient because it was loaded into the cache by getLinksTo().
1669                         $linkID = $titleObj->getArticleID();
1670                         $brokenLinks[] = array( 'bl_from' => $linkID, 'bl_to' => $t );
1671                 }
1672                 $dbw->insert( 'brokenlinks', $brokenLinks, $fname, 'IGNORE' );
1673
1674                 # Delete live links
1675                 $dbw->delete( 'links', array( 'l_to' => $id ) );
1676                 $dbw->delete( 'links', array( 'l_from' => $id ) );
1677                 $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
1678                 $dbw->delete( 'brokenlinks', array( 'bl_from' => $id ) );
1679                 $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
1680
1681                 # Log the deletion
1682                 $log = new LogPage( 'delete' );
1683                 $log->addEntry( 'delete', $this->mTitle, $reason );
1684
1685                 # Clear the cached article id so the interface doesn't act like we exist
1686                 $this->mTitle->resetArticleID( 0 );
1687                 $this->mTitle->mArticleID = 0;
1688                 return true;
1689         }
1690
1691         /**
1692          * Revert a modification
1693          */
1694         function rollback() {
1695                 global $wgUser, $wgOut, $wgRequest;
1696                 $fname = 'Article::rollback';
1697
1698                 if ( ! $wgUser->isAllowed('rollback') ) {
1699                         $wgOut->sysopRequired();
1700                         return;
1701                 }
1702                 if ( wfReadOnly() ) {
1703                         $wgOut->readOnlyPage( $this->getContent( true ) );
1704                         return;
1705                 }
1706                 if( !$wgUser->matchEditToken( $wgRequest->getVal( 'token' ),
1707                         array( $this->mTitle->getPrefixedText(),
1708                                 $wgRequest->getVal( 'from' ) )  ) ) {
1709                         $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
1710                         $wgOut->addWikiText( wfMsg( 'sessionfailure' ) );
1711                         return;
1712                 }
1713                 $dbw =& wfGetDB( DB_MASTER );
1714
1715                 # Enhanced rollback, marks edits rc_bot=1
1716                 $bot = $wgRequest->getBool( 'bot' );
1717
1718                 # Replace all this user's current edits with the next one down
1719                 $tt = $this->mTitle->getDBKey();
1720                 $n = $this->mTitle->getNamespace();
1721
1722                 # Get the last editor, lock table exclusively
1723                 $dbw->begin();
1724                 $current = Revision::newFromTitle( $this->mTitle );
1725                 if( is_null( $current ) ) {
1726                         # Something wrong... no page?
1727                         $dbw->rollback();
1728                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
1729                         return;
1730                 }
1731
1732                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
1733                 if( $from != $current->getUserText() ) {
1734                         $wgOut->setPageTitle(wfmsg('rollbackfailed'));
1735                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
1736                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
1737                                 htmlspecialchars( $from ),
1738                                 htmlspecialchars( $current->getUserText() ) ) );
1739                         if( $current->getComment() != '') {
1740                                 $wgOut->addHTML(
1741                                         wfMsg( 'editcomment',
1742                                         htmlspecialchars( $current->getComment() ) ) );
1743                         }
1744                         return;
1745                 }
1746
1747                 # Get the last edit not by this guy
1748                 $user = IntVal( $current->getUser() );
1749                 $user_text = $dbw->addQuotes( $current->getUserText() );
1750                 $s = $dbw->selectRow( 'revision',
1751                         array( 'rev_id', 'rev_timestamp' ),
1752                         array(
1753                                 'rev_page' => $current->getPage(),
1754                                 "rev_user <> {$user} OR rev_user_text <> {$user_text}"
1755                         ), $fname,
1756                         array(
1757                                 'USE INDEX' => 'page_timestamp',
1758                                 'ORDER BY'  => 'rev_timestamp DESC' )
1759                         );
1760                 if( $s === false ) {
1761                         # Something wrong
1762                         $dbw->rollback();
1763                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
1764                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
1765                         return;
1766                 }
1767
1768                 if ( $bot ) {
1769                         # Mark all reverted edits as bot
1770                         $dbw->update( 'recentchanges',
1771                                 array( /* SET */
1772                                         'rc_bot' => 1
1773                                 ), array( /* WHERE */
1774                                         'rc_cur_id'    => $current->getPage(),
1775                                         'rc_user_text' => $current->getUserText(),
1776                                         "rc_timestamp > '{$s->rev_timestamp}'",
1777                                 ), $fname
1778                         );
1779                 }
1780
1781                 # Save it!
1782                 $target = Revision::newFromId( $s->rev_id );
1783                 $newcomment = wfMsg( 'revertpage', $target->getUserText(), $from );
1784
1785                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1786                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1787                 $wgOut->addHTML( '<h2>' . htmlspecialchars( $newcomment ) . "</h2>\n<hr />\n" );
1788
1789                 $this->updateArticle( $target->getText(), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1790                 Article::onArticleEdit( $this->mTitle );
1791
1792                 $dbw->commit();
1793                 $wgOut->returnToMain( false );
1794         }
1795
1796
1797         /**
1798          * Do standard deferred updates after page view
1799          * @private
1800          */
1801         function viewUpdates() {
1802                 global $wgDeferredUpdateList;
1803
1804                 if ( 0 != $this->getID() ) {
1805                         global $wgDisableCounters;
1806                         if( !$wgDisableCounters ) {
1807                                 Article::incViewCount( $this->getID() );
1808                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1809                                 array_push( $wgDeferredUpdateList, $u );
1810                         }
1811                 }
1812
1813                 # Update newtalk status if user is reading their own
1814                 # talk page
1815
1816                 global $wgUser;
1817                 if ($this->mTitle->getNamespace() == NS_USER_TALK &&
1818                         $this->mTitle->getText() == $wgUser->getName()) {
1819                         require_once( 'UserTalkUpdate.php' );
1820                         $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(), $this->mTitle->getDBkey(), false, false, false );
1821                 }
1822         }
1823
1824         /**
1825          * Do standard deferred updates after page edit.
1826          * Every 1000th edit, prune the recent changes table.
1827          * @private
1828          * @param string $text
1829          */
1830         function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange) {
1831                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1832                 global $wgMessageCache, $wgUser;
1833
1834                 wfSeedRandom();
1835                 if ( 0 == mt_rand( 0, 999 ) ) {
1836                         # Periodically flush old entries from the recentchanges table.
1837                         global $wgRCMaxAge;
1838                         $dbw =& wfGetDB( DB_MASTER );
1839                         $cutoff = $dbw->timestamp( time() - $wgRCMaxAge );
1840                         $recentchanges = $dbw->tableName( 'recentchanges' );
1841                         $sql = "DELETE FROM $recentchanges WHERE rc_timestamp < '{$cutoff}'";
1842                         $dbw->query( $sql );
1843                 }
1844                 $id = $this->getID();
1845                 $title = $this->mTitle->getPrefixedDBkey();
1846                 $shortTitle = $this->mTitle->getDBkey();
1847
1848                 $adj = $this->mCountAdjustment;
1849
1850                 if ( 0 != $id ) {
1851                         $u = new LinksUpdate( $id, $title );
1852                         array_push( $wgDeferredUpdateList, $u );
1853                         $u = new SiteStatsUpdate( 0, 1, $adj );
1854                         array_push( $wgDeferredUpdateList, $u );
1855                         $u = new SearchUpdate( $id, $title, $text );
1856                         array_push( $wgDeferredUpdateList, $u );
1857
1858                         # If this is another user's talk page,
1859                         # create a watchlist entry for this page
1860
1861                         if ($this->mTitle->getNamespace() == NS_USER_TALK &&
1862                                 $shortTitle != $wgUser->getName()) {
1863                                 require_once( 'UserTalkUpdate.php' );
1864                                 $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle, $summary, $minoredit, $timestamp_of_pagechange);
1865                         }
1866
1867                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1868                                 $wgMessageCache->replace( $shortTitle, $text );
1869                         }
1870                 }
1871         }
1872
1873         /**
1874          * @todo document this function
1875          * @private
1876          * @param string $oldid         Revision ID of this article revision
1877          */
1878         function setOldSubtitle( $oldid=0 ) {
1879                 global $wgLang, $wgOut, $wgUser;
1880
1881                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1882                 $sk = $wgUser->getSkin();
1883                 $lnk = $sk->makeKnownLinkObj ( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
1884                 $prevlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid );
1885                 $nextlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
1886                 $r = wfMsg( 'revisionasofwithlink', $td, $lnk, $prevlink, $nextlink );
1887                 $wgOut->setSubtitle( $r );
1888         }
1889
1890         /**
1891          * This function is called right before saving the wikitext,
1892          * so we can do things like signatures and links-in-context.
1893          *
1894          * @param string $text
1895          */
1896         function preSaveTransform( $text ) {
1897                 global $wgParser, $wgUser;
1898                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
1899         }
1900
1901         /* Caching functions */
1902
1903         /**
1904          * checkLastModified returns true if it has taken care of all
1905          * output to the client that is necessary for this request.
1906          * (that is, it has sent a cached version of the page)
1907          */
1908         function tryFileCache() {
1909                 static $called = false;
1910                 if( $called ) {
1911                         wfDebug( " tryFileCache() -- called twice!?\n" );
1912                         return;
1913                 }
1914                 $called = true;
1915                 if($this->isFileCacheable()) {
1916                         $touched = $this->mTouched;
1917                         $cache = new CacheManager( $this->mTitle );
1918                         if($cache->isFileCacheGood( $touched )) {
1919                                 global $wgOut;
1920                                 wfDebug( " tryFileCache() - about to load\n" );
1921                                 $cache->loadFromFileCache();
1922                                 return true;
1923                         } else {
1924                                 wfDebug( " tryFileCache() - starting buffer\n" );
1925                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1926                         }
1927                 } else {
1928                         wfDebug( " tryFileCache() - not cacheable\n" );
1929                 }
1930         }
1931
1932         /**
1933          * Check if the page can be cached
1934          * @return bool
1935          */
1936         function isFileCacheable() {
1937                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
1938                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
1939
1940                 return $wgUseFileCache
1941                         and (!$wgShowIPinHeader)
1942                         and ($this->getID() != 0)
1943                         and ($wgUser->isAnon())
1944                         and (!$wgUser->getNewtalk())
1945                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
1946                         and (empty( $action ) || $action == 'view')
1947                         and (!isset($oldid))
1948                         and (!isset($diff))
1949                         and (!isset($redirect))
1950                         and (!isset($printable))
1951                         and (!$this->mRedirectedFrom);
1952         }
1953
1954         /**
1955          * Loads cur_touched and returns a value indicating if it should be used
1956          *
1957          */
1958         function checkTouched() {
1959                 $fname = 'Article::checkTouched';
1960                 $id = $this->getID();
1961                 $dbr =& $this->getDB();
1962                 $s = $dbr->selectRow( 'page', array( 'page_touched', 'page_is_redirect' ),
1963                         array( 'page_id' => $id ), $fname, $this->getSelectOptions() );
1964                 if( $s !== false ) {
1965                         $this->mTouched = wfTimestamp( TS_MW, $s->page_touched );
1966                         return !$s->page_is_redirect;
1967                 } else {
1968                         return false;
1969                 }
1970         }
1971
1972         /**
1973          * Edit an article without doing all that other stuff
1974          * The article must already exist; link tables etc
1975          * are not updated, caches are not flushed.
1976          *
1977          * @param string $text text submitted
1978          * @param string $comment comment submitted
1979          * @param bool $minor whereas it's a minor modification
1980          */
1981         function quickEdit( $text, $comment = '', $minor = 0 ) {
1982                 $fname = 'Article::quickEdit';
1983                 wfProfileIn( $fname );
1984
1985                 $dbw =& wfGetDB( DB_MASTER );
1986                 $dbw->begin();
1987                 $revision = new Revision( array(
1988                         'page'       => $this->getId(),
1989                         'text'       => $text,
1990                         'comment'    => $comment,
1991                         'minor_edit' => $minor ? 1 : 0,
1992                         ) );
1993                 $revisionId = $revision->insertOn( $dbw );
1994                 $this->updateRevisionOn( $dbw, $revisionId, $text );
1995                 $dbw->commit();
1996
1997                 wfProfileOut( $fname );
1998         }
1999
2000         /**
2001          * Used to increment the view counter
2002          *
2003          * @static
2004          * @param integer $id article id
2005          */
2006         function incViewCount( $id ) {
2007                 $id = intval( $id );
2008                 global $wgHitcounterUpdateFreq;
2009
2010                 $dbw =& wfGetDB( DB_MASTER );
2011                 $pageTable = $dbw->tableName( 'page' );
2012                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
2013                 $acchitsTable = $dbw->tableName( 'acchits' );
2014
2015                 if( $wgHitcounterUpdateFreq <= 1 ){ //
2016                         $dbw->query( "UPDATE $pageTable SET page_counter = page_counter + 1 WHERE page_id = $id" );
2017                         return;
2018                 }
2019
2020                 # Not important enough to warrant an error page in case of failure
2021                 $oldignore = $dbw->ignoreErrors( true );
2022
2023                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2024
2025                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2026                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2027                         # Most of the time (or on SQL errors), skip row count check
2028                         $dbw->ignoreErrors( $oldignore );
2029                         return;
2030                 }
2031
2032                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2033                 $row = $dbw->fetchObject( $res );
2034                 $rown = intval( $row->n );
2035                 if( $rown >= $wgHitcounterUpdateFreq ){
2036                         wfProfileIn( 'Article::incViewCount-collect' );
2037                         $old_user_abort = ignore_user_abort( true );
2038
2039                         $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2040                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable TYPE=HEAP ".
2041                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2042                                 'GROUP BY hc_id');
2043                         $dbw->query("DELETE FROM $hitcounterTable");
2044                         $dbw->query('UNLOCK TABLES');
2045                         $dbw->query("UPDATE $curTable,$acchitsTable SET cur_counter=cur_counter + hc_n ".
2046                                 'WHERE cur_id = hc_id');
2047                         $dbw->query("DROP TABLE $acchitsTable");
2048
2049                         ignore_user_abort( $old_user_abort );
2050                         wfProfileOut( 'Article::incViewCount-collect' );
2051                 }
2052                 $dbw->ignoreErrors( $oldignore );
2053         }
2054
2055         /**#@+
2056          * The onArticle*() functions are supposed to be a kind of hooks
2057          * which should be called whenever any of the specified actions
2058          * are done.
2059          *
2060          * This is a good place to put code to clear caches, for instance.
2061          *
2062          * This is called on page move and undelete, as well as edit
2063          * @static
2064          * @param $title_obj a title object
2065          */
2066
2067         function onArticleCreate($title_obj) {
2068                 global $wgUseSquid, $wgPostCommitUpdateList;
2069
2070                 $titles = $title_obj->getBrokenLinksTo();
2071
2072                 # Purge squid
2073                 if ( $wgUseSquid ) {
2074                         $urls = $title_obj->getSquidURLs();
2075                         foreach ( $titles as $linkTitle ) {
2076                                 $urls[] = $linkTitle->getInternalURL();
2077                         }
2078                         $u = new SquidUpdate( $urls );
2079                         array_push( $wgPostCommitUpdateList, $u );
2080                 }
2081
2082                 # Clear persistent link cache
2083                 LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
2084         }
2085
2086         function onArticleDelete($title_obj) {
2087                 LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
2088         }
2089         function onArticleEdit($title_obj) {
2090                 LinkCache::linksccClearPage( $title_obj->getArticleID() );
2091         }
2092         /**#@-*/
2093
2094         /**
2095          * Info about this page
2096          * Called for ?action=info when $wgAllowPageInfo is on.
2097          *
2098          * @access public
2099          */
2100         function info() {
2101                 global $wgLang, $wgOut, $wgAllowPageInfo;
2102                 $fname = 'Article::info';
2103
2104                 if ( !$wgAllowPageInfo ) {
2105                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
2106                         return;
2107                 }
2108
2109                 $page = $this->mTitle->getSubjectPage();
2110
2111                 $wgOut->setPagetitle( $page->getPrefixedText() );
2112                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
2113
2114                 # first, see if the page exists at all.
2115                 $exists = $page->getArticleId() != 0;
2116                 if( !$exists ) {
2117                         $wgOut->addHTML( wfMsg('noarticletext') );
2118                 } else {
2119                         $dbr =& $this->getDB( DB_SLAVE );
2120                         $wl_clause = array(
2121                                 'wl_title'     => $page->getDBkey(),
2122                                 'wl_namespace' => $page->getNamespace() );
2123                         $numwatchers = $dbr->selectField(
2124                                 'watchlist',
2125                                 'COUNT(*)',
2126                                 $wl_clause,
2127                                 $fname,
2128                                 $this->getSelectOptions() );
2129
2130                         $pageInfo = $this->pageCountInfo( $page );
2131                         $talkInfo = $this->pageCountInfo( $page->getTalkPage() );
2132
2133                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $wgLang->formatNum( $numwatchers ) ) . '</li>' );
2134                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $wgLang->formatNum( $pageInfo['edits'] ) ) . '</li>');
2135                         if( $talkInfo ) {
2136                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $wgLang->formatNum( $talkInfo['edits'] ) ) . '</li>');
2137                         }
2138                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $wgLang->formatNum( $pageInfo['authors'] ) ) . '</li>' );
2139                         if( $talkInfo ) {
2140                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $wgLang->formatNum( $talkInfo['authors'] ) ) . '</li>' );
2141                         }
2142                         $wgOut->addHTML( '</ul>' );
2143
2144                 }
2145         }
2146
2147         /**
2148          * Return the total number of edits and number of unique editors
2149          * on a given page. If page does not exist, returns false.
2150          *
2151          * @param Title $title
2152          * @return array
2153          * @access private
2154          */
2155         function pageCountInfo( $title ) {
2156                 $id = $title->getArticleId();
2157                 if( $id == 0 ) {
2158                         return false;
2159                 }
2160
2161                 $dbr =& $this->getDB( DB_SLAVE );
2162
2163                 $rev_clause = array( 'rev_page' => $id );
2164                 $fname = 'Article::pageCountInfo';
2165
2166                 $edits = $dbr->selectField(
2167                         'revision',
2168                         'COUNT(rev_page)',
2169                         $rev_clause,
2170                         $fname,
2171                         $this->getSelectOptions() );
2172
2173                 $authors = $dbr->selectField(
2174                         'revision',
2175                         'COUNT(DISTINCT rev_user_text)',
2176                         $rev_clause,
2177                         $fname,
2178                         $this->getSelectOptions() );
2179
2180                 return array( 'edits' => $edits, 'authors' => $authors );
2181         }
2182 }
2183
2184
2185 ?>