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