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