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                 wfProfileOut( $fname );
 736                 return $newid;
 737         }
 738
 739         /**
 740          * Update the page record to point to a newly saved revision.
 741          *
 742          * @param Database $dbw
 743          * @param int $revId
 744          * @param int $lastRevision
 745          * @param bool $isRedirect
 746          * @return bool true on success, false on failure
 747          * @access private
 748          */
 749         function updateRevisionOn( &$dbw, $revId, $lastRevision, $isRedirect = false ) {
 750                 $fname = 'Article::updateToRevision';
 751                 wfProfileIn( $fname );
 752
 753                 $dbw->update( 'page',
 754                         array( /* SET */
 755                                 'page_latest'      => $revId,
 756                                 'page_touched'     => $dbw->timestamp(),
 757                                 'page_is_new'      => ($lastRevision == 0),
 758                                 'page_is_redirect' => $isRedirect,
 759                         ), array( /* WHERE */
 760                                 'page_id'          => $this->getId(),
 761                                 'page_latest'      => $lastRevision, # Paranoia
 762                         ), $fname
 763                 );
 764
 765                 wfProfileOut( $fname );
 766                 return ( $dbw->affectedRows() != 0 );
 767         }
 768
 769         /**
 770          * Theoretically we could defer these whole insert and update
 771          * functions for after display, but that's taking a big leap
 772          * of faith, and we want to be able to report database
 773          * errors at some point.
 774          * @private
 775          */
 776         function insertNewArticle( $text, $summary, $isminor, $watchthis ) {
 777                 global $wgOut, $wgUser;
 778                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 779
 780                 $fname = 'Article::insertNewArticle';
 781
 782                 $this->mCountAdjustment = $this->isCountable( $text );
 783
 784                 $ns = $this->mTitle->getNamespace();
 785                 $ttl = $this->mTitle->getDBkey();
 786                 $text = $this->preSaveTransform( $text );
 787                 $isminor = ( $isminor && $wgUser->isLoggedIn() ) ? 1 : 0;
 788
 789                 $dbw =& wfGetDB( DB_MASTER );
 790
 791                 # Add the page record; stake our claim on this title!
 792                 $newid = $this->insertOn( $dbw );
 793
 794                 # Save the revision text...
 795                 $revision = new Revision( array(
 796                         'page'       => $newid,
 797                         'comment'    => $summary,
 798                         'minor_edit' => $isminor,
 799                         'text'       => $text
 800                         ) );
 801                 $revisionId = $revision->insertOn( $dbw );
 802
 803                 $this->mTitle->resetArticleID( $newid );
 804
 805                 # Update the page record with revision data
 806                 $this->updateRevisionOn( $dbw, $revisionId, 0, $this->isRedirect( $text ) );
 807
 808                 Article::onArticleCreate( $this->mTitle );
 809                 RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary );
 810
 811                 if ($watchthis) {
 812                         if(!$this->mTitle->userIsWatching()) $this->watch();
 813                 } else {
 814                         if ( $this->mTitle->userIsWatching() ) {
 815                                 $this->unwatch();
 816                         }
 817                 }
 818
 819                 # The talk page isn't in the regular link tables, so we need to update manually:
 820                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 821                 $dbw->update( 'page',
 822                         array( 'page_touched' => $dbw->timestamp($now) ),
 823                         array( 'page_namespace' => $talkns,
 824                                'page_title' => $ttl ),
 825                         $fname );
 826
 827                 # standard deferred updates
 828                 $this->editUpdates( $text, $summary, $isminor, $now );
 829
 830                 $oldid = 0; # new article
 831                 $this->showArticle( $text, wfMsg( 'newarticle' ), false, $isminor, $now, $summary, $oldid );
 832         }
 833
 834         /**
 835          * Fetch and uncompress the text for a given revision.
 836          * Can ask by rev_id number or timestamp (set $field)
 837          */
 838         function fetchRevisionText( $revId = null, $field = 'rev_id' ) {
 839                 $fname = 'Article::fetchRevisionText';
 840                 $dbw =& wfGetDB( DB_MASTER );
 841                 if( $revId ) {
 842                         $rev = $dbw->addQuotes( $revId );
 843                 } else {
 844                         $rev = 'page_latest';
 845                 }
 846                 $result = $dbw->query(
 847                         sprintf( "SELECT old_text, old_flags
 848                                 FROM %s,%s,%s
 849                                 WHERE old_id=rev_id AND rev_page=page_id AND page_id=%d
 850                                 AND %s=%s",
 851                                 $dbw->tableName( 'page' ),
 852                                 $dbw->tableName( 'revision' ),
 853                                 $dbw->tableName( 'text' ),
 854                                 IntVal( $this->mTitle->getArticleId() ),
 855                                 $field,
 856                                 $rev ),
 857                         $fname );
 858                 $obj = $dbw->fetchObject( $result );
 859                 $dbw->freeResult( $result );
 860                 $oldtext = Revision::getRevisionText( $obj );
 861                 return $oldtext;
 862         }
 863
 864         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = '', $edittime = NULL) {
 865                 $fname = 'Article::getTextOfLastEditWithSectionReplacedOrAdded';
 866                 if( is_null( $edittime ) ) {
 867                         $oldtext = $this->fetchRevisionText();
 868                 } else {
 869                         $oldtext = $this->fetchRevisionText( $edittime, 'rev_timestamp' );
 870                 }
 871                 if ($section != '') {
 872                         if($section=='new') {
 873                                 if($summary) $subject="== {$summary} ==\n\n";
 874                                 $text=$oldtext."\n\n".$subject.$text;
 875                         } else {
 876
 877                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 878                                 # comments to be stripped as well)
 879                                 $striparray=array();
 880                                 $parser=new Parser();
 881                                 $parser->mOutputType=OT_WIKI;
 882                                 $oldtext=$parser->strip($oldtext, $striparray, true);
 883
 884                                 # now that we can be sure that no pseudo-sections are in the source,
 885                                 # split it up
 886                                 # Unfortunately we can't simply do a preg_replace because that might
 887                                 # replace the wrong section, so we have to use the section counter instead
 888                                 $secs=preg_split('/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 889                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 890                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 891
 892                                 # section 0 is top (intro) section
 893                                 if($section!=0) {
 894
 895                                         # headline of old section - we need to go through this section
 896                                         # to determine if there are any subsections that now need to
 897                                         # be erased, as the mother section has been replaced with
 898                                         # the text of all subsections.
 899                                         $headline=$secs[$section*2-1];
 900                                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 901                                         $hlevel=$matches[1];
 902
 903                                         # determine headline level for wikimarkup headings
 904                                         if(strpos($hlevel,'=')!==false) {
 905                                                 $hlevel=strlen($hlevel);
 906                                         }
 907
 908                                         $secs[$section*2-1]=''; // erase old headline
 909                                         $count=$section+1;
 910                                         $break=false;
 911                                         while(!empty($secs[$count*2-1]) && !$break) {
 912
 913                                                 $subheadline=$secs[$count*2-1];
 914                                                 preg_match(
 915                                                  '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 916                                                 $subhlevel=$matches[1];
 917                                                 if(strpos($subhlevel,'=')!==false) {
 918                                                         $subhlevel=strlen($subhlevel);
 919                                                 }
 920                                                 if($subhlevel > $hlevel) {
 921                                                         // erase old subsections
 922                                                         $secs[$count*2-1]='';
 923                                                         $secs[$count*2]='';
 924                                                 }
 925                                                 if($subhlevel <= $hlevel) {
 926                                                         $break=true;
 927                                                 }
 928                                                 $count++;
 929
 930                                         }
 931
 932                                 }
 933                                 $text=join('',$secs);
 934                                 # reinsert the stuff that we stripped out earlier
 935                                 $text=$parser->unstrip($text,$striparray);
 936                                 $text=$parser->unstripNoWiki($text,$striparray);
 937                         }
 938
 939                 }
 940                 return $text;
 941         }
 942
 943         /**
 944          * Change an existing article. Puts the previous version back into the old table, updates RC
 945          * and all necessary caches, mostly via the deferred update array.
 946          *
 947          * It is possible to call this function from a command-line script, but note that you should
 948          * first set $wgUser, and clean up $wgDeferredUpdates after each edit.
 949          */
 950         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
 951                 global $wgOut, $wgUser;
 952                 global $wgDBtransactions, $wgMwRedir;
 953                 global $wgUseSquid, $wgInternalServer, $wgPostCommitUpdateList;
 954
 955                 $fname = 'Article::updateArticle';
 956                 $good = true;
 957
 958                 $isminor = ( $minor && $wgUser->isLoggedIn() );
 959                 if ( $this->isRedirect( $text ) ) {
 960                         # Remove all content but redirect
 961                         # This could be done by reconstructing the redirect from a title given by
 962                         # Title::newFromRedirect(), but then we wouldn't know which synonym the user
 963                         # wants to see
 964                         if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ')[^\\n]+)/i', $text, $m ) ) {
 965                                 $redir = 1;
 966                                 $text = $m[1] . "\n";
 967                         }
 968                 }
 969                 else { $redir = 0; }
 970
 971                 $text = $this->preSaveTransform( $text );
 972                 $dbw =& wfGetDB( DB_MASTER );
 973
 974                 # Update article, but only if changed.
 975
 976                 # It's important that we either rollback or complete, otherwise an attacker could
 977                 # overwrite cur entries by sending precisely timed user aborts. Random bored users
 978                 # could conceivably have the same effect, especially if cur is locked for long periods.
 979                 if( $wgDBtransactions ) {
 980                         $dbw->query( 'BEGIN', $fname );
 981                 } else {
 982                         $userAbort = ignore_user_abort( true );
 983                 }
 984
 985                 $oldtext = $this->getContent( true );
 986
 987                 if ( 0 != strcmp( $text, $oldtext ) ) {
 988                         $this->mCountAdjustment = $this->isCountable( $text )
 989                           - $this->isCountable( $oldtext );
 990                         $now = wfTimestampNow();
 991
 992                         $lastRevision = $dbw->selectField(
 993                                 'page', 'page_latest', array( 'page_id' => $this->getId() ) );
 994
 995                         $revision = new Revision( array(
 996                                 'page'       => $this->getId(),
 997                                 'comment'    => $summary,
 998                                 'minor_edit' => $isminor,
 999                                 'text'       => $text
1000                                 ) );
1001                         $revisionId = $revision->insertOn( $dbw );
1002
1003                         # Update page
1004                         $ok = $this->updateRevisionOn( $dbw, $revisionId, $lastRevision, $redir );
1005
1006                         if( !$ok ) {
1007                                 /* Belated edit conflict! Run away!! */
1008                                 $good = false;
1009                         } else {
1010                                 # Update recentchanges and purge cache and whatnot
1011                                 $bot = (int)($wgUser->isBot() || $forceBot);
1012                                 RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
1013                                         $lastRevision, $this->getTimestamp(), $bot );
1014                                 Article::onArticleEdit( $this->mTitle );
1015                         }
1016                 }
1017
1018                 if( $wgDBtransactions ) {
1019                         $dbw->query( 'COMMIT', $fname );
1020                 } else {
1021                         ignore_user_abort( $userAbort );
1022                 }
1023
1024                 if ( $good ) {
1025                         if ($watchthis) {
1026                                 if (!$this->mTitle->userIsWatching()) $this->watch();
1027                         } else {
1028                                 if ( $this->mTitle->userIsWatching() ) {
1029                                         $this->unwatch();
1030                                 }
1031                         }
1032                         # standard deferred updates
1033                         $this->editUpdates( $text, $summary, $minor, $now );
1034
1035
1036                         $urls = array();
1037                         # Template namespace
1038                         # Purge all articles linking here
1039                         if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
1040                                 $titles = $this->mTitle->getLinksTo();
1041                                 Title::touchArray( $titles );
1042                                 if ( $wgUseSquid ) {
1043                                                 foreach ( $titles as $title ) {
1044                                                         $urls[] = $title->getInternalURL();
1045                                                 }
1046                                 }
1047                         }
1048
1049                         # Squid updates
1050                         if ( $wgUseSquid ) {
1051                                 $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
1052                                 $u = new SquidUpdate( $urls );
1053                                 array_push( $wgPostCommitUpdateList, $u );
1054                         }
1055
1056                         $this->showArticle( $text, wfMsg( 'updated' ), $sectionanchor, $me2, $now, $summary, $lastRevision );
1057                 }
1058                 return $good;
1059         }
1060
1061         /**
1062          * After we've either updated or inserted the article, update
1063          * the link tables and redirect to the new page.
1064          */
1065         function showArticle( $text, $subtitle , $sectionanchor = '', $me2, $now, $summary, $oldid ) {
1066                 global $wgOut, $wgUser, $wgLinkCache, $wgEnotif;
1067
1068                 $wgLinkCache = new LinkCache();
1069                 # Select for update
1070                 $wgLinkCache->forUpdate( true );
1071
1072                 # Get old version of link table to allow incremental link updates
1073                 $wgLinkCache->preFill( $this->mTitle );
1074                 $wgLinkCache->clear();
1075
1076                 # Parse the text and replace links with placeholders
1077                 $wgOut = new OutputPage();
1078                 $wgOut->addWikiText( $text );
1079
1080                 # Look up the links in the DB and add them to the link cache
1081                 $wgOut->transformBuffer( RLH_FOR_UPDATE );
1082
1083                 if( $this->isRedirect( $text ) )
1084                         $r = 'redirect=no';
1085                 else
1086                         $r = '';
1087                 $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
1088
1089                 # this call would better fit into RecentChange::notifyEdit and RecentChange::notifyNew .
1090                 # this will be improved later (to-do)
1091
1092                 include_once( "UserMailer.php" );
1093                 $wgEnotif = new EmailNotification ();
1094                 $wgEnotif->NotifyOnPageChange( $wgUser->getID(), $this->mTitle->getDBkey(), $this->mTitle->getNamespace(),$now, $summary, $me2, $oldid );
1095         }
1096
1097         /**
1098          * Mark this particular edit as patrolled
1099          */
1100         function markpatrolled() {
1101                 global $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgUseRCPatrol, $wgUser;
1102                 $wgOut->setRobotpolicy( 'noindex,follow' );
1103
1104                 if ( !$wgUseRCPatrol )
1105                 {
1106                         $wgOut->errorpage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1107                         return;
1108                 }
1109                 if ( $wgUser->isAnon() )
1110                 {
1111                         $wgOut->loginToUse();
1112                         return;
1113                 }
1114                 if ( $wgOnlySysopsCanPatrol && !$wgUser->isAllowed('patrol') )
1115                 {
1116                         $wgOut->sysopRequired();
1117                         return;
1118                 }
1119                 $rcid = $wgRequest->getVal( 'rcid' );
1120                 if ( !is_null ( $rcid ) )
1121                 {
1122                         RecentChange::markPatrolled( $rcid );
1123                         $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
1124                         $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
1125
1126                         $rcTitle = Title::makeTitle( NS_SPECIAL, 'Recentchanges' );
1127                         $wgOut->returnToMain( false, $rcTitle->getPrefixedText() );
1128                 }
1129                 else
1130                 {
1131                         $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1132                 }
1133         }
1134
1135
1136         /**
1137          * Add this page to $wgUser's watchlist
1138          */
1139
1140         function watch() {
1141
1142                 global $wgUser, $wgOut;
1143
1144                 if ( $wgUser->isAnon() ) {
1145                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1146                         return;
1147                 }
1148                 if ( wfReadOnly() ) {
1149                         $wgOut->readOnlyPage();
1150                         return;
1151                 }
1152
1153                 if (wfRunHooks('WatchArticle', $wgUser, $this)) {
1154
1155                         $wgUser->addWatch( $this->mTitle );
1156                         $wgUser->saveSettings();
1157
1158                         wfRunHooks('WatchArticleComplete', $wgUser, $this);
1159
1160                         $wgOut->setPagetitle( wfMsg( 'addedwatch' ) );
1161                         $wgOut->setRobotpolicy( 'noindex,follow' );
1162
1163                         $link = $this->mTitle->getPrefixedText();
1164                         $text = wfMsg( 'addedwatchtext', $link );
1165                         $wgOut->addWikiText( $text );
1166                 }
1167
1168                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1169         }
1170
1171         /**
1172          * Stop watching a page
1173          */
1174
1175         function unwatch() {
1176
1177                 global $wgUser, $wgOut;
1178
1179                 if ( $wgUser->isAnon() ) {
1180                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1181                         return;
1182                 }
1183                 if ( wfReadOnly() ) {
1184                         $wgOut->readOnlyPage();
1185                         return;
1186                 }
1187
1188                 if (wfRunHooks('UnwatchArticle', $wgUser, $this)) {
1189
1190                         $wgUser->removeWatch( $this->mTitle );
1191                         $wgUser->saveSettings();
1192
1193                         wfRunHooks('UnwatchArticleComplete', $wgUser, $this);
1194
1195                         $wgOut->setPagetitle( wfMsg( 'removedwatch' ) );
1196                         $wgOut->setRobotpolicy( 'noindex,follow' );
1197
1198                         $link = $this->mTitle->getPrefixedText();
1199                         $text = wfMsg( 'removedwatchtext', $link );
1200                         $wgOut->addWikiText( $text );
1201                 }
1202
1203                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1204         }
1205
1206         /**
1207          * protect a page
1208          */
1209         function protect( $limit = 'sysop' ) {
1210                 global $wgUser, $wgOut, $wgRequest;
1211
1212                 if ( ! $wgUser->isAllowed('protect') ) {
1213                         $wgOut->sysopRequired();
1214                         return;
1215                 }
1216                 if ( wfReadOnly() ) {
1217                         $wgOut->readOnlyPage();
1218                         return;
1219                 }
1220                 $id = $this->mTitle->getArticleID();
1221                 if ( 0 == $id ) {
1222                         $wgOut->fatalError( wfMsg( 'badarticleerror' ) );
1223                         return;
1224                 }
1225
1226                 $confirm = $wgRequest->wasPosted() &&
1227                         $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
1228                 $moveonly = $wgRequest->getBool( 'wpMoveOnly' );
1229                 $reason = $wgRequest->getText( 'wpReasonProtect' );
1230
1231                 if ( $confirm ) {
1232                         $dbw =& wfGetDB( DB_MASTER );
1233                         $dbw->update( 'page',
1234                                 array( /* SET */
1235                                         'page_touched' => $dbw->timestamp(),
1236                                         'page_restrictions' => (string)$limit
1237                                 ), array( /* WHERE */
1238                                         'page_id' => $id
1239                                 ), 'Article::protect'
1240                         );
1241
1242                         $restrictions = "move=" . $limit;
1243                         if( !$moveonly ) {
1244                                 $restrictions .= ":edit=" . $limit;
1245                         }
1246                         if (wfRunHooks('ArticleProtect', $this, $wgUser, $limit == 'sysop', $reason, $moveonly)) {
1247
1248                                 $dbw =& wfGetDB( DB_MASTER );
1249                                 $dbw->update( 'page',
1250                                                           array( /* SET */
1251                                                                          'page_touched' => $dbw->timestamp(),
1252                                                                          'page_restrictions' => $restrictions
1253                                                                          ), array( /* WHERE */
1254                                                                                            'page_id' => $id
1255                                                                                            ), 'Article::protect'
1256                                                           );
1257
1258                                 wfRunHooks('ArticleProtectComplete', $this, $wgUser, $limit == 'sysop', $reason, $moveonly);
1259
1260                                 $log = new LogPage( 'protect' );
1261                                 if ( $limit === '' ) {
1262                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1263                                 } else {
1264                                         $log->addEntry( 'protect', $this->mTitle, $reason );
1265                                 }
1266                                 $wgOut->redirect( $this->mTitle->getFullURL() );
1267                         }
1268                         return;
1269                 } else {
1270                         $reason = htmlspecialchars( wfMsg( 'protectreason' ) );
1271                         return $this->confirmProtect( '', $reason, $limit );
1272                 }
1273         }
1274
1275         /**
1276          * Output protection confirmation dialog
1277          */
1278         function confirmProtect( $par, $reason, $limit = 'sysop'  ) {
1279                 global $wgOut, $wgUser;
1280
1281                 wfDebug( "Article::confirmProtect\n" );
1282
1283                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1284                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1285
1286                 $check = '';
1287                 $protcom = '';
1288                 $moveonly = '';
1289
1290                 if ( $limit === '' ) {
1291                         $wgOut->setPageTitle( wfMsg( 'confirmunprotect' ) );
1292                         $wgOut->setSubtitle( wfMsg( 'unprotectsub', $sub ) );
1293                         $wgOut->addWikiText( wfMsg( 'confirmunprotecttext' ) );
1294                         $protcom = htmlspecialchars( wfMsg( 'unprotectcomment' ) );
1295                         $formaction = $this->mTitle->escapeLocalURL( 'action=unprotect' . $par );
1296                 } else {
1297                         $wgOut->setPageTitle( wfMsg( 'confirmprotect' ) );
1298                         $wgOut->setSubtitle( wfMsg( 'protectsub', $sub ) );
1299                         $wgOut->addWikiText( wfMsg( 'confirmprotecttext' ) );
1300                         $moveonly = htmlspecialchars( wfMsg( 'protectmoveonly' ) );
1301                         $protcom = htmlspecialchars( wfMsg( 'protectcomment' ) );
1302                         $formaction = $this->mTitle->escapeLocalURL( 'action=protect' . $par );
1303                 }
1304
1305                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1306                 $token = htmlspecialchars( $wgUser->editToken() );
1307
1308                 $wgOut->addHTML( "
1309 <form id='protectconfirm' method='post' action=\"{$formaction}\">
1310         <table border='0'>
1311                 <tr>
1312                         <td align='right'>
1313                                 <label for='wpReasonProtect'>{$protcom}:</label>
1314                         </td>
1315                         <td align='left'>
1316                                 <input type='text' size='60' name='wpReasonProtect' id='wpReasonProtect' value=\"" . htmlspecialchars( $reason ) . "\" />
1317                         </td>
1318                 </tr>
1319                 <tr>
1320                         <td>&nbsp;</td>
1321                 </tr>" );
1322                 if($moveonly != '') {
1323                         $wgOut->AddHTML( "
1324                 <tr>
1325                         <td align='right'>
1326                                 <input type='checkbox' name='wpMoveOnly' value='1' id='wpMoveOnly' />
1327                         </td>
1328                         <td>
1329                                 <label for='wpMoveOnly'>{$moveonly}</label>
1330                         </td>
1331                 </tr> " );
1332                 }
1333                 $wgOut->addHTML( "
1334                 <tr>
1335                         <td>&nbsp;</td>
1336                         <td>
1337                                 <input type='submit' name='wpConfirmProtectB' value=\"{$confirm}\" />
1338                         </td>
1339                 </tr>
1340         </table>
1341         <input type='hidden' name='wpEditToken' value=\"{$token}\" />
1342 </form>\n" );
1343
1344                 $wgOut->returnToMain( false );
1345         }
1346
1347         /**
1348          * Unprotect the pages
1349          */
1350         function unprotect() {
1351                 return $this->protect( '' );
1352         }
1353
1354         /*
1355          * UI entry point for page deletion
1356          */
1357         function delete() {
1358                 global $wgUser, $wgOut, $wgMessageCache, $wgRequest;
1359                 $fname = 'Article::delete';
1360                 $confirm = $wgRequest->wasPosted() &&
1361                         $wgUser->matchEditToken( $wgRequest->getVal( 'wpEditToken' ) );
1362                 $reason = $wgRequest->getText( 'wpReason' );
1363
1364                 # This code desperately needs to be totally rewritten
1365
1366                 # Check permissions
1367                 if ( ( ! $wgUser->isAllowed('delete') ) ) {
1368                         $wgOut->sysopRequired();
1369                         return;
1370                 }
1371                 if ( wfReadOnly() ) {
1372                         $wgOut->readOnlyPage();
1373                         return;
1374                 }
1375
1376                 # Better double-check that it hasn't been deleted yet!
1377                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1378                 if ( ( '' == trim( $this->mTitle->getText() ) )
1379                   or ( $this->mTitle->getArticleId() == 0 ) ) {
1380                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1381                         return;
1382                 }
1383
1384                 if ( $confirm ) {
1385                         $this->doDelete( $reason );
1386                         return;
1387                 }
1388
1389                 # determine whether this page has earlier revisions
1390                 # and insert a warning if it does
1391                 # we select the text because it might be useful below
1392                 $dbr =& $this->getDB();
1393                 $ns = $this->mTitle->getNamespace();
1394                 $title = $this->mTitle->getDBkey();
1395                 $revisions = $dbr->select( array( 'page', 'revision' ),
1396                         array( 'rev_id' ),
1397                         array(
1398                                 'page_namespace' => $ns,
1399                                 'page_title' => $title,
1400                                 'rev_page = page_id'
1401                         ), $fname, $this->getSelectOptions( array( 'ORDER BY' => 'rev_timestamp DESC' ) )
1402                 );
1403
1404                 if( $dbr->numRows( $revisions ) > 1 && !$confirm ) {
1405                         $skin=$wgUser->getSkin();
1406                         $wgOut->addHTML('<b>'.wfMsg('historywarning'));
1407                         $wgOut->addHTML( $skin->historyLink() .'</b>');
1408                 }
1409
1410                 # Fetch cur_text
1411                 $s = $dbr->selectRow( array( 'page', 'text' ),
1412                         array( 'old_text' ),
1413                         array(
1414                                 'page_namespace' => $ns,
1415                                 'page_title' => $title,
1416                                 'page_latest = old_id'
1417                         ), $fname, $this->getSelectOptions()
1418                 );
1419
1420                 if( $s !== false ) {
1421                         # if this is a mini-text, we can paste part of it into the deletion reason
1422
1423                         #if this is empty, an earlier revision may contain "useful" text
1424                         $blanked = false;
1425                         if($s->old_text != '') {
1426                                 $text=$s->old_text;
1427                         } else {
1428                                 if($old) { # TODO
1429                                         $text = Revision::getRevisionText( $old );
1430                                         $blanked = true;
1431                                 }
1432
1433                         }
1434
1435                         $length=strlen($text);
1436
1437                         # this should not happen, since it is not possible to store an empty, new
1438                         # page. Let's insert a standard text in case it does, though
1439                         if($length == 0 && $reason === '') {
1440                                 $reason = wfMsg('exblank');
1441                         }
1442
1443                         if($length < 500 && $reason === '') {
1444
1445                                 # comment field=255, let's grep the first 150 to have some user
1446                                 # space left
1447                                 $text=substr($text,0,150);
1448                                 # let's strip out newlines and HTML tags
1449                                 $text=preg_replace('/\"/',"'",$text);
1450                                 $text=preg_replace('/\</','&lt;',$text);
1451                                 $text=preg_replace('/\>/','&gt;',$text);
1452                                 $text=preg_replace("/[\n\r]/",'',$text);
1453                                 if(!$blanked) {
1454                                         $reason=wfMsg('excontent'). " '".$text;
1455                                 } else {
1456                                         $reason=wfMsg('exbeforeblank') . " '".$text;
1457                                 }
1458                                 if($length>150) { $reason .= '...'; } # we've only pasted part of the text
1459                                 $reason.="'";
1460                         }
1461                 }
1462
1463                 return $this->confirmDelete( '', $reason );
1464         }
1465
1466         /**
1467          * Output deletion confirmation dialog
1468          */
1469         function confirmDelete( $par, $reason ) {
1470                 global $wgOut, $wgUser;
1471
1472                 wfDebug( "Article::confirmDelete\n" );
1473
1474                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1475                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1476                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1477                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1478
1479                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1480
1481                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1482                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1483                 $token = htmlspecialchars( $wgUser->editToken() );
1484
1485                 $wgOut->addHTML( "
1486 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1487         <table border='0'>
1488                 <tr>
1489                         <td align='right'>
1490                                 <label for='wpReason'>{$delcom}:</label>
1491                         </td>
1492                         <td align='left'>
1493                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1494                         </td>
1495                 </tr>
1496                 <tr>
1497                         <td>&nbsp;</td>
1498                 </tr>
1499                 <tr>
1500                         <td>&nbsp;</td>
1501                         <td>
1502                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1503                         </td>
1504                 </tr>
1505         </table>
1506         <input type='hidden' name='wpEditToken' value=\"{$token}\" />
1507 </form>\n" );
1508
1509                 $wgOut->returnToMain( false );
1510         }
1511
1512
1513         /**
1514          * Perform a deletion and output success or failure messages
1515          */
1516         function doDelete( $reason ) {
1517                 global $wgOut, $wgUser, $wgContLang;
1518                 $fname = 'Article::doDelete';
1519                 wfDebug( $fname."\n" );
1520
1521                 if (wfRunHooks('ArticleDelete', $this, $wgUser, $reason)) {
1522                         if ( $this->doDeleteArticle( $reason ) ) {
1523                                 $deleted = $this->mTitle->getPrefixedText();
1524
1525                                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1526                                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1527
1528                                 $sk = $wgUser->getSkin();
1529                                 $loglink = $sk->makeKnownLink( $wgContLang->getNsText( NS_PROJECT ) .
1530                                                                                            ':' . wfMsgForContent( 'dellogpage' ),
1531                                                                                            wfMsg( 'deletionlog' ) );
1532
1533                                 $text = wfMsg( 'deletedtext', $deleted, $loglink );
1534
1535                                 $wgOut->addHTML( '<p>' . $text . "</p>\n" );
1536                                 $wgOut->returnToMain( false );
1537                                 wfRunHooks('ArticleDeleteComplete', $this, $wgUser, $reason);
1538                         } else {
1539                                 $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1540                         }
1541                 }
1542         }
1543
1544         /**
1545          * Back-end article deletion
1546          * Deletes the article with database consistency, writes logs, purges caches
1547          * Returns success
1548          */
1549         function doDeleteArticle( $reason ) {
1550                 global $wgUser;
1551                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer, $wgPostCommitUpdateList;
1552
1553                 $fname = 'Article::doDeleteArticle';
1554                 wfDebug( $fname."\n" );
1555
1556                 $dbw =& wfGetDB( DB_MASTER );
1557                 $ns = $this->mTitle->getNamespace();
1558                 $t = $this->mTitle->getDBkey();
1559                 $id = $this->mTitle->getArticleID();
1560
1561                 if ( $t == '' || $id == 0 ) {
1562                         return false;
1563                 }
1564
1565                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
1566                 array_push( $wgDeferredUpdateList, $u );
1567
1568                 $linksTo = $this->mTitle->getLinksTo();
1569
1570                 # Squid purging
1571                 if ( $wgUseSquid ) {
1572                         $urls = array(
1573                                 $this->mTitle->getInternalURL(),
1574                                 $this->mTitle->getInternalURL( 'history' )
1575                         );
1576                         foreach ( $linksTo as $linkTo ) {
1577                                 $urls[] = $linkTo->getInternalURL();
1578                         }
1579
1580                         $u = new SquidUpdate( $urls );
1581                         array_push( $wgPostCommitUpdateList, $u );
1582
1583                 }
1584
1585                 # Client and file cache invalidation
1586                 Title::touchArray( $linksTo );
1587
1588                 # Move article and history to the "archive" table
1589
1590                 $dbw->insertSelect( 'archive', array( 'page','revision', 'text' ),
1591                         array(
1592                                 'ar_namespace'  => 'page_namespace',
1593                                 'ar_title'      => 'page_title',
1594                                 'ar_text'       => 'old_text',
1595                                 'ar_comment'    => 'rev_comment',
1596                                 'ar_user'       => 'rev_user',
1597                                 'ar_user_text'  => 'rev_user_text',
1598                                 'ar_timestamp'  => 'rev_timestamp',
1599                                 'ar_minor_edit' => 'rev_minor_edit',
1600                                 'ar_flags'      => 'old_flags',
1601                                 'ar_rev_id'     => 'rev_id',
1602                         ), array(
1603                                 'page_namespace' => $ns,
1604                                 'page_title' => $t,
1605                                 'page_id = rev_page AND old_id = rev_id'
1606                         ), $fname
1607                 );
1608
1609                 # Now that it's safely backed up, delete it
1610
1611                 $dbw->deleteJoin( 'text', 'revision', 'old_id', 'rev_id', array( "rev_page = {$id}" ), $fname );
1612                 $dbw->delete( 'revision', array( 'rev_page' => $id ), $fname );
1613                 $dbw->delete( 'page', array( 'page_id' => $id ), $fname);
1614
1615                 $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), $fname );
1616
1617                 # Finally, clean up the link tables
1618                 $t = $this->mTitle->getPrefixedDBkey();
1619
1620                 Article::onArticleDelete( $this->mTitle );
1621
1622                 # Insert broken links
1623                 $brokenLinks = array();
1624                 foreach ( $linksTo as $titleObj ) {
1625                         # Get article ID. Efficient because it was loaded into the cache by getLinksTo().
1626                         $linkID = $titleObj->getArticleID();
1627                         $brokenLinks[] = array( 'bl_from' => $linkID, 'bl_to' => $t );
1628                 }
1629                 $dbw->insert( 'brokenlinks', $brokenLinks, $fname, 'IGNORE' );
1630
1631                 # Delete live links
1632                 $dbw->delete( 'links', array( 'l_to' => $id ) );
1633                 $dbw->delete( 'links', array( 'l_from' => $id ) );
1634                 $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
1635                 $dbw->delete( 'brokenlinks', array( 'bl_from' => $id ) );
1636                 $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
1637
1638                 # Log the deletion
1639                 $log = new LogPage( 'delete' );
1640                 $log->addEntry( 'delete', $this->mTitle, $reason );
1641
1642                 # Clear the cached article id so the interface doesn't act like we exist
1643                 $this->mTitle->resetArticleID( 0 );
1644                 $this->mTitle->mArticleID = 0;
1645                 return true;
1646         }
1647
1648         /**
1649          * Revert a modification
1650          */
1651         function rollback() {
1652                 global $wgUser, $wgOut, $wgRequest;
1653                 $fname = 'Article::rollback';
1654
1655                 if ( ! $wgUser->isAllowed('rollback') ) {
1656                         $wgOut->sysopRequired();
1657                         return;
1658                 }
1659                 if ( wfReadOnly() ) {
1660                         $wgOut->readOnlyPage( $this->getContent( true ) );
1661                         return;
1662                 }
1663                 if( !$wgUser->matchEditToken( $wgRequest->getVal( 'token' ),
1664                         array( $this->mTitle->getPrefixedText(),
1665                                 $wgRequest->getVal( 'from' ) )  ) ) {
1666                         $wgOut->setPageTitle( wfMsg( 'rollbackfailed' ) );
1667                         $wgOut->addWikiText( wfMsg( 'sessionfailure' ) );
1668                         return;
1669                 }
1670                 $dbw =& wfGetDB( DB_MASTER );
1671
1672                 # Enhanced rollback, marks edits rc_bot=1
1673                 $bot = $wgRequest->getBool( 'bot' );
1674
1675                 # Replace all this user's current edits with the next one down
1676                 $tt = $this->mTitle->getDBKey();
1677                 $n = $this->mTitle->getNamespace();
1678
1679                 # Get the last editor, lock table exclusively
1680                 $s = $dbw->selectRow( array( 'page', 'revision' ),
1681                         array( 'page_id','rev_user','rev_user_text','rev_comment' ),
1682                         array( 'page_title' => $tt, 'page_namespace' => $n ),
1683                         $fname, 'FOR UPDATE'
1684                 );
1685                 if( $s === false ) {
1686                         # Something wrong
1687                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
1688                         return;
1689                 }
1690                 $ut = $dbw->strencode( $s->cur_user_text );
1691                 $uid = $s->rev_user;
1692                 $pid = $s->page_id;
1693
1694                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
1695                 if( $from != $s->rev_user_text ) {
1696                         $wgOut->setPageTitle(wfmsg('rollbackfailed'));
1697                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
1698                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
1699                                 htmlspecialchars( $from ),
1700                                 htmlspecialchars( $s->rev_user_text ) ) );
1701                         if($s->rev_comment != '') {
1702                                 $wgOut->addHTML(
1703                                         wfMsg('editcomment',
1704                                         htmlspecialchars( $s->rev_comment ) ) );
1705                         }
1706                         return;
1707                 }
1708
1709                 # Get the last edit not by this guy
1710                 $s = $dbw->selectRow( 'old',
1711                         array( 'old_text','old_user','old_user_text','old_timestamp','old_flags' ),
1712                         array(
1713                                 'old_namespace' => $n,
1714                                 'old_title' => $tt,
1715                                 "old_user <> {$uid} OR old_user_text <> '{$ut}'"
1716                         ), $fname, array( 'FOR UPDATE', 'USE INDEX' => 'name_title_timestamp' )
1717                 );
1718                 if( $s === false ) {
1719                         # Something wrong
1720                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
1721                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
1722                         return;
1723                 }
1724
1725                 if ( $bot ) {
1726                         # Mark all reverted edits as bot
1727                         $dbw->update( 'recentchanges',
1728                                 array( /* SET */
1729                                         'rc_bot' => 1
1730                                 ), array( /* WHERE */
1731                                         'rc_user' => $uid,
1732                                         "rc_timestamp > '{$s->old_timestamp}'",
1733                                 ), $fname
1734                         );
1735                 }
1736
1737                 # Save it!
1738                 $newcomment = wfMsg( 'revertpage', $s->old_user_text, $from );
1739                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1740                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1741                 $wgOut->addHTML( '<h2>' . htmlspecialchars( $newcomment ) . "</h2>\n<hr />\n" );
1742                 $this->updateArticle( Revision::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1743                 Article::onArticleEdit( $this->mTitle );
1744                 $wgOut->returnToMain( false );
1745         }
1746
1747
1748         /**
1749          * Do standard deferred updates after page view
1750          * @private
1751          */
1752         function viewUpdates() {
1753                 global $wgDeferredUpdateList;
1754
1755                 if ( 0 != $this->getID() ) {
1756                         global $wgDisableCounters;
1757                         if( !$wgDisableCounters ) {
1758                                 Article::incViewCount( $this->getID() );
1759                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1760                                 array_push( $wgDeferredUpdateList, $u );
1761                         }
1762                 }
1763
1764                 # Update newtalk status if user is reading their own
1765                 # talk page
1766
1767                 global $wgUser;
1768                 if ($this->mTitle->getNamespace() == NS_USER_TALK &&
1769                         $this->mTitle->getText() == $wgUser->getName()) {
1770                         require_once( 'UserTalkUpdate.php' );
1771                         $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(), $this->mTitle->getDBkey(), false, false, false );
1772                 }
1773         }
1774
1775         /**
1776          * Do standard deferred updates after page edit.
1777          * Every 1000th edit, prune the recent changes table.
1778          * @private
1779          * @param string $text
1780          */
1781         function editUpdates( $text, $summary, $minoredit, $timestamp_of_pagechange) {
1782                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1783                 global $wgMessageCache, $wgUser;
1784
1785                 wfSeedRandom();
1786                 if ( 0 == mt_rand( 0, 999 ) ) {
1787                         # Periodically flush old entries from the recentchanges table.
1788                         global $wgRCMaxAge;
1789                         $dbw =& wfGetDB( DB_MASTER );
1790                         $cutoff = $dbw->timestamp( time() - $wgRCMaxAge );
1791                         $recentchanges = $dbw->tableName( 'recentchanges' );
1792                         $sql = "DELETE FROM $recentchanges WHERE rc_timestamp < '{$cutoff}'";
1793                         $dbw->query( $sql );
1794                 }
1795                 $id = $this->getID();
1796                 $title = $this->mTitle->getPrefixedDBkey();
1797                 $shortTitle = $this->mTitle->getDBkey();
1798
1799                 $adj = $this->mCountAdjustment;
1800
1801                 if ( 0 != $id ) {
1802                         $u = new LinksUpdate( $id, $title );
1803                         array_push( $wgDeferredUpdateList, $u );
1804                         $u = new SiteStatsUpdate( 0, 1, $adj );
1805                         array_push( $wgDeferredUpdateList, $u );
1806                         $u = new SearchUpdate( $id, $title, $text );
1807                         array_push( $wgDeferredUpdateList, $u );
1808
1809                         # If this is another user's talk page,
1810                         # create a watchlist entry for this page
1811
1812                         if ($this->mTitle->getNamespace() == NS_USER_TALK &&
1813                                 $shortTitle != $wgUser->getName()) {
1814                                 require_once( 'UserTalkUpdate.php' );
1815                                 $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle, $summary, $minoredit, $timestamp_of_pagechange);
1816                         }
1817
1818                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1819                                 $wgMessageCache->replace( $shortTitle, $text );
1820                         }
1821                 }
1822         }
1823
1824         /**
1825          * @todo document this function
1826          * @private
1827          * @param string $oldid         Revision ID of this article revision
1828          */
1829         function setOldSubtitle( $oldid=0 ) {
1830                 global $wgLang, $wgOut, $wgUser;
1831
1832                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1833                 $sk = $wgUser->getSkin();
1834                 $lnk = $sk->makeKnownLinkObj ( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
1835                 $prevlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'previousrevision' ), 'direction=prev&oldid='.$oldid );
1836                 $nextlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsg( 'nextrevision' ), 'direction=next&oldid='.$oldid );
1837                 $r = wfMsg( 'revisionasofwithlink', $td, $lnk, $prevlink, $nextlink );
1838                 $wgOut->setSubtitle( $r );
1839         }
1840
1841         /**
1842          * This function is called right before saving the wikitext,
1843          * so we can do things like signatures and links-in-context.
1844          *
1845          * @param string $text
1846          */
1847         function preSaveTransform( $text ) {
1848                 global $wgParser, $wgUser;
1849                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
1850         }
1851
1852         /* Caching functions */
1853
1854         /**
1855          * checkLastModified returns true if it has taken care of all
1856          * output to the client that is necessary for this request.
1857          * (that is, it has sent a cached version of the page)
1858          */
1859         function tryFileCache() {
1860                 static $called = false;
1861                 if( $called ) {
1862                         wfDebug( " tryFileCache() -- called twice!?\n" );
1863                         return;
1864                 }
1865                 $called = true;
1866                 if($this->isFileCacheable()) {
1867                         $touched = $this->mTouched;
1868                         $cache = new CacheManager( $this->mTitle );
1869                         if($cache->isFileCacheGood( $touched )) {
1870                                 global $wgOut;
1871                                 wfDebug( " tryFileCache() - about to load\n" );
1872                                 $cache->loadFromFileCache();
1873                                 return true;
1874                         } else {
1875                                 wfDebug( " tryFileCache() - starting buffer\n" );
1876                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1877                         }
1878                 } else {
1879                         wfDebug( " tryFileCache() - not cacheable\n" );
1880                 }
1881         }
1882
1883         /**
1884          * Check if the page can be cached
1885          * @return bool
1886          */
1887         function isFileCacheable() {
1888                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
1889                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
1890
1891                 return $wgUseFileCache
1892                         and (!$wgShowIPinHeader)
1893                         and ($this->getID() != 0)
1894                         and ($wgUser->isAnon())
1895                         and (!$wgUser->getNewtalk())
1896                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
1897                         and (empty( $action ) || $action == 'view')
1898                         and (!isset($oldid))
1899                         and (!isset($diff))
1900                         and (!isset($redirect))
1901                         and (!isset($printable))
1902                         and (!$this->mRedirectedFrom);
1903         }
1904
1905         /**
1906          * Loads cur_touched and returns a value indicating if it should be used
1907          *
1908          */
1909         function checkTouched() {
1910                 $fname = 'Article::checkTouched';
1911                 $id = $this->getID();
1912                 $dbr =& $this->getDB();
1913                 $s = $dbr->selectRow( 'page', array( 'page_touched', 'page_is_redirect' ),
1914                         array( 'page_id' => $id ), $fname, $this->getSelectOptions() );
1915                 if( $s !== false ) {
1916                         $this->mTouched = wfTimestamp( TS_MW, $s->page_touched );
1917                         return !$s->page_is_redirect;
1918                 } else {
1919                         return false;
1920                 }
1921         }
1922
1923         /**
1924          * Edit an article without doing all that other stuff
1925          *
1926          * @param string $text text submitted
1927          * @param string $comment comment submitted
1928          * @param integer $minor whereas it's a minor modification
1929          */
1930         function quickEdit( $text, $comment = '', $minor = 0 ) {
1931                 global $wgUser;
1932                 $fname = 'Article::quickEdit';
1933
1934                 #wfDebugDieBacktrace( "$fname called." );
1935
1936                 wfProfileIn( $fname );
1937
1938                 $dbw =& wfGetDB( DB_MASTER );
1939                 $ns = $this->mTitle->getNamespace();
1940                 $dbkey = $this->mTitle->getDBkey();
1941                 $encDbKey = $dbw->strencode( $dbkey );
1942                 $timestamp = $dbw->timestamp();
1943                 # insert new text
1944                 $dbw->insert( 'text', array(
1945                                 'old_text' => $text,
1946                                 'old_flags' => "" ), $fname );
1947                 $text_id = $dbw->insertID();
1948
1949                 # update page
1950                 $dbw->update( 'page', array(
1951                         'page_is_new' => 0,
1952                         'page_touched' => $timestamp,
1953                         'page_is_redirect' => $this->isRedirect( $text ) ? 1 : 0,
1954                         'page_latest' => $text_id ),
1955                         array( 'page_namespace' => $ns, 'page_title' => $dbkey ), $fname );
1956                 # Retrieve page ID
1957                 $page_id = $dbw->selectField( 'page', 'page_id', array( 'page_namespace' => $ns, 'page_title' => $dbkey ), $fname );
1958
1959                 # update revision
1960                 $dbw->insert( 'revision', array(
1961                         'rev_id' => $text_id,
1962                         'rev_page' => $page_id,
1963                         'rev_comment' => $comment,
1964                         'rev_user' => $wgUser->getID(),
1965                         'rev_user_text' => $wgUser->getName(),
1966                         'rev_timestamp' => $timestamp,
1967                         'rev_minor_edit' => intval($minor) ),
1968                         $fname );
1969                 wfProfileOut( $fname );
1970         }
1971
1972         /**
1973          * Used to increment the view counter
1974          *
1975          * @static
1976          * @param integer $id article id
1977          */
1978         function incViewCount( $id ) {
1979                 $id = intval( $id );
1980                 global $wgHitcounterUpdateFreq;
1981
1982                 $dbw =& wfGetDB( DB_MASTER );
1983                 $pageTable = $dbw->tableName( 'page' );
1984                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
1985                 $acchitsTable = $dbw->tableName( 'acchits' );
1986
1987                 if( $wgHitcounterUpdateFreq <= 1 ){ //
1988                         $dbw->query( "UPDATE $pageTable SET page_counter = page_counter + 1 WHERE page_id = $id" );
1989                         return;
1990                 }
1991
1992                 # Not important enough to warrant an error page in case of failure
1993                 $oldignore = $dbw->ignoreErrors( true );
1994
1995                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
1996
1997                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
1998                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
1999                         # Most of the time (or on SQL errors), skip row count check
2000                         $dbw->ignoreErrors( $oldignore );
2001                         return;
2002                 }
2003
2004                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2005                 $row = $dbw->fetchObject( $res );
2006                 $rown = intval( $row->n );
2007                 if( $rown >= $wgHitcounterUpdateFreq ){
2008                         wfProfileIn( 'Article::incViewCount-collect' );
2009                         $old_user_abort = ignore_user_abort( true );
2010
2011                         $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2012                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable TYPE=HEAP ".
2013                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2014                                 'GROUP BY hc_id');
2015                         $dbw->query("DELETE FROM $hitcounterTable");
2016                         $dbw->query('UNLOCK TABLES');
2017                         $dbw->query("UPDATE $curTable,$acchitsTable SET cur_counter=cur_counter + hc_n ".
2018                                 'WHERE cur_id = hc_id');
2019                         $dbw->query("DROP TABLE $acchitsTable");
2020
2021                         ignore_user_abort( $old_user_abort );
2022                         wfProfileOut( 'Article::incViewCount-collect' );
2023                 }
2024                 $dbw->ignoreErrors( $oldignore );
2025         }
2026
2027         /**#@+
2028          * The onArticle*() functions are supposed to be a kind of hooks
2029          * which should be called whenever any of the specified actions
2030          * are done.
2031          *
2032          * This is a good place to put code to clear caches, for instance.
2033          *
2034          * This is called on page move and undelete, as well as edit
2035          * @static
2036          * @param $title_obj a title object
2037          */
2038
2039         function onArticleCreate($title_obj) {
2040                 global $wgUseSquid, $wgPostCommitUpdateList;
2041
2042                 $titles = $title_obj->getBrokenLinksTo();
2043
2044                 # Purge squid
2045                 if ( $wgUseSquid ) {
2046                         $urls = $title_obj->getSquidURLs();
2047                         foreach ( $titles as $linkTitle ) {
2048                                 $urls[] = $linkTitle->getInternalURL();
2049                         }
2050                         $u = new SquidUpdate( $urls );
2051                         array_push( $wgPostCommitUpdateList, $u );
2052                 }
2053
2054                 # Clear persistent link cache
2055                 LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
2056         }
2057
2058         function onArticleDelete($title_obj) {
2059                 LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
2060         }
2061         function onArticleEdit($title_obj) {
2062                 LinkCache::linksccClearPage( $title_obj->getArticleID() );
2063         }
2064         /**#@-*/
2065
2066         /**
2067          * Info about this page
2068          * Called for ?action=info when $wgAllowPageInfo is on.
2069          *
2070          * @access public
2071          */
2072         function info() {
2073                 global $wgLang, $wgOut, $wgAllowPageInfo;
2074                 $fname = 'Article::info';
2075
2076                 if ( !$wgAllowPageInfo ) {
2077                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
2078                         return;
2079                 }
2080
2081                 $page = $this->mTitle->getSubjectPage();
2082
2083                 $wgOut->setPagetitle( $page->getPrefixedText() );
2084                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
2085
2086                 # first, see if the page exists at all.
2087                 $exists = $page->getArticleId() != 0;
2088                 if( !$exists ) {
2089                         $wgOut->addHTML( wfMsg('noarticletext') );
2090                 } else {
2091                         $dbr =& $this->getDB( DB_SLAVE );
2092                         $wl_clause = array(
2093                                 'wl_title'     => $page->getDBkey(),
2094                                 'wl_namespace' => $page->getNamespace() );
2095                         $numwatchers = $dbr->selectField(
2096                                 'watchlist',
2097                                 'COUNT(*)',
2098                                 $wl_clause,
2099                                 $fname,
2100                                 $this->getSelectOptions() );
2101
2102                         $pageInfo = $this->pageCountInfo( $page );
2103                         $talkInfo = $this->pageCountInfo( $page->getTalkPage() );
2104
2105                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $wgLang->formatNum( $numwatchers ) ) . '</li>' );
2106                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $wgLang->formatNum( $pageInfo['edits'] ) ) . '</li>');
2107                         if( $talkInfo ) {
2108                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $wgLang->formatNum( $talkInfo['edits'] ) ) . '</li>');
2109                         }
2110                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $wgLang->formatNum( $pageInfo['authors'] ) ) . '</li>' );
2111                         if( $talkInfo ) {
2112                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $wgLang->formatNum( $talkInfo['authors'] ) ) . '</li>' );
2113                         }
2114                         $wgOut->addHTML( '</ul>' );
2115
2116                 }
2117         }
2118
2119         /**
2120          * Return the total number of edits and number of unique editors
2121          * on a given page. If page does not exist, returns false.
2122          *
2123          * @param Title $title
2124          * @return array
2125          * @access private
2126          */
2127         function pageCountInfo( $title ) {
2128                 $id = $title->getArticleId();
2129                 if( $id == 0 ) {
2130                         return false;
2131                 }
2132
2133                 $dbr =& $this->getDB( DB_SLAVE );
2134
2135                 $rev_clause = array( 'rev_page' => $id );
2136                 $fname = 'Article::pageCountInfo';
2137
2138                 $edits = $dbr->selectField(
2139                         'revision',
2140                         'COUNT(rev_page)',
2141                         $rev_clause,
2142                         $fname,
2143                         $this->getSelectOptions() );
2144
2145                 $authors = $dbr->selectField(
2146                         'revision',
2147                         'COUNT(DISTINCT rev_user_text)',
2148                         $rev_clause,
2149                         $fname,
2150                         $this->getSelectOptions() );
2151
2152                 return array( 'edits' => $edits, 'authors' => $authors );
2153         }
2154 }
2155
2156 /**
2157  * Check whether an article is a stub
2158  *
2159  * @public
2160  * @param integer $articleID    ID of the article that is to be checked
2161  */
2162 function wfArticleIsStub( $articleID ) {
2163         global $wgUser;
2164         $fname = 'wfArticleIsStub';
2165
2166         wfDebugDieBacktrace( 'This function seems to be unused. Pending removal.' );
2167
2168         $threshold = $wgUser->getOption('stubthreshold') ;
2169         if ( $threshold > 0 ) {
2170                 $dbr =& wfGetDB( DB_SLAVE );
2171                 $s = $dbr->selectRow( array('page', 'text'),
2172                         array( 'LENGTH(old_text) AS len', 'page_namespace', 'page_is_redirect' ),
2173                         array( 'page_id' => $articleID, "page.page_latest=text.old_id" ),
2174                         $fname ) ;
2175                 if ( $s == false OR $s->page_is_redirect OR $s->page_namespace != NS_MAIN ) {
2176                         return false;
2177                 }
2178                 $size = $s->len;
2179                 return ( $size < $threshold );
2180         }
2181         return false;
2182 }
2183
2184 ?>