includes/Article.php

   1 <?php
   2 # $Id$
   3 /**
   4  * File for articles
   5  */
   6
   7 /**
   8  * Need the CacheManager to be loaded
   9  */
  10 require_once ( 'CacheManager.php' );
  11
  12 $wgArticleCurContentFields = false;
  13 $wgArticleOldContentFields = false;
  14
  15 /**
  16  * Class representing a Wikipedia article and history.
  17  *
  18  * See design.doc for an overview.
  19  * Note: edit user interface and cache support functions have been
  20  * moved to separate EditPage and CacheManager classes.
  21  */
  22 class Article {
  23         /**#@+
  24          * @access private
  25          */
  26         var $mContent, $mContentLoaded;
  27         var $mUser, $mTimestamp, $mUserText;
  28         var $mCounter, $mComment, $mCountAdjustment;
  29         var $mMinorEdit, $mRedirectedFrom;
  30         var $mTouched, $mFileCache, $mTitle;
  31         var $mId, $mTable;
  32         var $mForUpdate;
  33         /**#@-*/
  34
  35         /**
  36          * Constructor and clear the article
  37          */
  38         function Article( &$title ) {
  39                 $this->mTitle =& $title;
  40                 $this->clear();
  41         }
  42
  43         /**
  44           * Clear the object
  45           * @private
  46           */
  47         function clear() {
  48                 $this->mContentLoaded = false;
  49                 $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
  50                 $this->mRedirectedFrom = $this->mUserText =
  51                 $this->mTimestamp = $this->mComment = $this->mFileCache = '';
  52                 $this->mCountAdjustment = 0;
  53                 $this->mTouched = '19700101000000';
  54                 $this->mForUpdate = false;
  55         }
  56
  57         /**
  58           * Get revision text associated with an old or archive row
  59           * $row is usually an object from wfFetchRow(), both the flags and the text
  60           * field must be included
  61           * @static
  62           * @param integer $row Id of a row
  63           * @param string $prefix table prefix (default 'old_')
  64           * @return string $text the text requested
  65         */
  66         function getRevisionText( $row, $prefix = 'old_' ) {
  67                 # Get data
  68                 $textField = $prefix . 'text';
  69                 $flagsField = $prefix . 'flags';
  70
  71                 if ( isset( $row->$flagsField ) ) {
  72                         $flags = explode( ',', $row->$flagsField );
  73                 } else {
  74                         $flags = array();
  75                 }
  76
  77                 if ( isset( $row->$textField ) ) {
  78                         $text = $row->$textField;
  79                 } else {
  80                         return false;
  81                 }
  82
  83                 if ( in_array( 'link', $flags ) ) {
  84                         # Handle link type
  85                         $text = Article::followLink( $text );
  86                 } elseif ( in_array( 'gzip', $flags ) ) {
  87                         # Deal with optional compression of archived pages.
  88                         # This can be done periodically via maintenance/compressOld.php, and
  89                         # as pages are saved if $wgCompressRevisions is set.
  90                         return gzinflate( $text );
  91                 }
  92                 return $text;
  93         }
  94
  95         /**
  96          * If $wgCompressRevisions is enabled, we will compress datas
  97          * @static
  98          * @param reference to a text
  99          * @return string 'gzip' if it get compressed, '' overwise
 100          */
 101         function compressRevisionText( &$text ) {
 102                 global $wgCompressRevisions;
 103                 if( !$wgCompressRevisions ) {
 104                         return '';
 105                 }
 106                 if( !function_exists( 'gzdeflate' ) ) {
 107                         wfDebug( "Article::compressRevisionText() -- no zlib support, not compressing\n" );
 108                         return '';
 109                 }
 110                 $text = gzdeflate( $text );
 111                 return 'gzip';
 112         }
 113
 114         /**
 115          * Returns the text associated with a "link" type old table row
 116          * @static
 117          */
 118         function followLink( $link ) {
 119                 # Split the link into fields and values
 120                 $lines = explode( '\n', $link );
 121                 $hash = '';
 122                 $locations = array();
 123                 foreach ( $lines as $line ) {
 124                         # Comments
 125                         if ( $line{0} == '#' ) {
 126                                 continue;
 127                         }
 128                         # Field/value pairs
 129                         if ( preg_match( '/^(.*?)\s*:\s*(.*)$/', $line, $matches ) ) {
 130                                 $field = strtolower($matches[1]);
 131                                 $value = $matches[2];
 132                                 if ( $field == 'hash' ) {
 133                                         $hash = $value;
 134                                 } elseif ( $field == 'location' ) {
 135                                         $locations[] = $value;
 136                                 }
 137                         }
 138                 }
 139
 140                 if ( $hash === '' ) {
 141                         return false;
 142                 }
 143
 144                 # Look in each specified location for the text
 145                 $text = false;
 146                 foreach ( $locations as $location ) {
 147                         $text = Article::fetchFromLocation( $location, $hash );
 148                         if ( $text !== false ) {
 149                                 break;
 150                         }
 151                 }
 152
 153                 return $text;
 154         }
 155
 156         /**
 157          * @static
 158          */
 159         function fetchFromLocation( $location, $hash ) {
 160                 global $wgLoadBalancer;
 161                 $fname = 'fetchFromLocation';
 162                 wfProfileIn( $fname );
 163
 164                 $p = strpos( $location, ':' );
 165                 if ( $p === false ) {
 166                         wfProfileOut( $fname );
 167                         return false;
 168                 }
 169
 170                 $type = substr( $location, 0, $p );
 171                 $text = false;
 172                 switch ( $type ) {
 173                         case 'mysql':
 174                                 # MySQL locations are specified by mysql://<machineID>/<dbname>/<tblname>/<index>
 175                                 # Machine ID 0 is the current connection
 176                                 if ( preg_match( '/^mysql:\/\/(\d+)\/([A-Za-z_]+)\/([A-Za-z_]+)\/([A-Za-z_]+)$/',
 177                                   $location, $matches ) ) {
 178                                         $machineID = $matches[1];
 179                                         $dbName = $matches[2];
 180                                         $tblName = $matches[3];
 181                                         $index = $matches[4];
 182                                         if ( $machineID == 0 ) {
 183                                                 # Current connection
 184                                                 $db =& $this->getDB();
 185                                         } else {
 186                                                 # Alternate connection
 187                                                 $db =& $wgLoadBalancer->getConnection( $machineID );
 188
 189                                                 if ( array_key_exists( $machineId, $wgKnownMysqlServers ) ) {
 190                                                         # Try to open, return false on failure
 191                                                         $params = $wgKnownDBServers[$machineId];
 192                                                         $db = Database::newFromParams( $params['server'], $params['user'], $params['password'],
 193                                                                 $dbName, 1, DBO_IGNORE );
 194                                                 }
 195                                         }
 196                                         if ( $db->isOpen() ) {
 197                                                 $index = $db->strencode( $index );
 198                                                 $res = $db->query( "SELECT blob_data FROM $dbName.$tblName " .
 199                                                         "WHERE blob_index='$index' " . $this->getSelectOptions(), $fname );
 200                                                 $row = $db->fetchObject( $res );
 201                                                 $text = $row->text_data;
 202                                         }
 203                                 }
 204                                 break;
 205                         case 'file':
 206                                 # File locations are of the form file://<filename>, relative to the current directory
 207                                 if ( preg_match( '/^file:\/\/(.*)$', $location, $matches ) )
 208                                 $filename = strstr( $location, 'file://' );
 209                                 $text = @file_get_contents( $matches[1] );
 210                 }
 211                 if ( $text !== false ) {
 212                         # Got text, now we need to interpret it
 213                         # The first line contains information about how to do this
 214                         $p = strpos( $text, '\n' );
 215                         $type = substr( $text, 0, $p );
 216                         $text = substr( $text, $p + 1 );
 217                         switch ( $type ) {
 218                                 case 'plain':
 219                                         break;
 220                                 case 'gzip':
 221                                         $text = gzinflate( $text );
 222                                         break;
 223                                 case 'object':
 224                                         $object = unserialize( $text );
 225                                         $text = $object->getItem( $hash );
 226                                         break;
 227                                 default:
 228                                         $text = false;
 229                         }
 230                 }
 231                 wfProfileOut( $fname );
 232                 return $text;
 233         }
 234
 235         /**
 236          * Note that getContent/loadContent may follow redirects if
 237          * not told otherwise, and so may cause a change to mTitle.
 238          *
 239          * Return the text of this revision
 240         */
 241         function getContent( $noredir ) {
 242                 global $wgRequest;
 243
 244                 # Get variables from query string :P
 245                 $action = $wgRequest->getText( 'action', 'view' );
 246                 $section = $wgRequest->getText( 'section' );
 247
 248                 $fname =  'Article::getContent';
 249                 wfProfileIn( $fname );
 250
 251                 if ( 0 == $this->getID() ) {
 252                         if ( 'edit' == $action ) {
 253                                 wfProfileOut( $fname );
 254                                 return ''; # was "newarticletext", now moved above the box)
 255                         }
 256                         wfProfileOut( $fname );
 257                         return wfMsg( 'noarticletext' );
 258                 } else {
 259                         $this->loadContent( $noredir );
 260                         # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 261                         if ( $this->mTitle->getNamespace() == NS_USER_TALK &&
 262                           preg_match('/^\d{1,3}\.\d{1,3}.\d{1,3}\.\d{1,3}$/',$this->mTitle->getText()) &&
 263                           $action=='view'
 264                         ) {
 265                                 wfProfileOut( $fname );
 266                                 return $this->mContent . "\n" .wfMsg('anontalkpagetext');
 267                         } else {
 268                                 if($action=='edit') {
 269                                         if($section!='') {
 270                                                 if($section=='new') {
 271                                                         wfProfileOut( $fname );
 272                                                         return '';
 273                                                 }
 274
 275                                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 276                                                 # comments to be stripped as well)
 277                                                 $rv=$this->getSection($this->mContent,$section);
 278                                                 wfProfileOut( $fname );
 279                                                 return $rv;
 280                                         }
 281                                 }
 282                                 wfProfileOut( $fname );
 283                                 return $this->mContent;
 284                         }
 285                 }
 286         }
 287
 288         /**
 289          * This function returns the text of a section, specified by a number ($section).
 290          * A section is text under a heading like == Heading == or <h1>Heading</h1>, or
 291          * the first section before any such heading (section 0).
 292          *
 293          * If a section contains subsections, these are also returned.
 294         */
 295         function getSection($text,$section) {
 296
 297                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 298                 # comments to be stripped as well)
 299                 $striparray=array();
 300                 $parser=new Parser();
 301                 $parser->mOutputType=OT_WIKI;
 302                 $striptext=$parser->strip($text, $striparray, true);
 303
 304                 # now that we can be sure that no pseudo-sections are in the source,
 305                 # split it up by section
 306                 $secs =
 307                   preg_split(
 308                   '/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 309                   $striptext, -1,
 310                   PREG_SPLIT_DELIM_CAPTURE);
 311                 if($section==0) {
 312                         $rv=$secs[0];
 313                 } else {
 314                         $headline=$secs[$section*2-1];
 315                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 316                         $hlevel=$matches[1];
 317
 318                         # translate wiki heading into level
 319                         if(strpos($hlevel,'=')!==false) {
 320                                 $hlevel=strlen($hlevel);
 321                         }
 322
 323                         $rv=$headline. $secs[$section*2];
 324                         $count=$section+1;
 325
 326                         $break=false;
 327                         while(!empty($secs[$count*2-1]) && !$break) {
 328
 329                                 $subheadline=$secs[$count*2-1];
 330                                 preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 331                                 $subhlevel=$matches[1];
 332                                 if(strpos($subhlevel,'=')!==false) {
 333                                         $subhlevel=strlen($subhlevel);
 334                                 }
 335                                 if($subhlevel > $hlevel) {
 336                                         $rv.=$subheadline.$secs[$count*2];
 337                                 }
 338                                 if($subhlevel <= $hlevel) {
 339                                         $break=true;
 340                                 }
 341                                 $count++;
 342
 343                         }
 344                 }
 345                 # reinsert stripped tags
 346                 $rv=$parser->unstrip($rv,$striparray);
 347                 $rv=$parser->unstripNoWiki($rv,$striparray);
 348                 $rv=trim($rv);
 349                 return $rv;
 350
 351         }
 352
 353         /**
 354          * Return an array of the columns of the "cur"-table
 355         */
 356         function &getCurContentFields() {
 357                 global $wgArticleCurContentFields;
 358                 if ( !$wgArticleCurContentFields ) {
 359                         $wgArticleCurContentFields = array( 'cur_text','cur_timestamp','cur_user', 'cur_user_text',
 360                           'cur_comment','cur_counter','cur_restrictions','cur_touched' );
 361                 }
 362                 return $wgArticleCurContentFields;
 363         }
 364
 365         /**
 366          * Return an array of the columns of the "old"-table
 367         */
 368         function &getOldContentFields() {
 369                 global $wgArticleOldContentFields;
 370                 if ( !$wgArticleOldContentFields ) {
 371                         $wgArticleOldContentFields = array( 'old_namespace','old_title','old_text','old_timestamp',
 372                           'old_user','old_user_text','old_comment','old_flags' );
 373                 }
 374                 return $wgArticleOldContentFields;
 375         }
 376
 377         /**
 378          * Load the revision (including cur_text) into this object
 379         */
 380         function loadContent( $noredir = false ) {
 381                 global $wgOut, $wgMwRedir, $wgRequest;
 382
 383                 $dbr =& $this->getDB();
 384                 # Query variables :P
 385                 $oldid = $wgRequest->getVal( 'oldid' );
 386                 $redirect = $wgRequest->getVal( 'redirect' );
 387
 388                 if ( $this->mContentLoaded ) return;
 389                 $fname = 'Article::loadContent';
 390
 391                 # Pre-fill content with error message so that if something
 392                 # fails we'll have something telling us what we intended.
 393
 394                 $t = $this->mTitle->getPrefixedText();
 395                 if ( isset( $oldid ) ) {
 396                         $oldid = IntVal( $oldid );
 397                         $t .= ',oldid='.$oldid;
 398                 }
 399                 if ( isset( $redirect ) ) {
 400                         $redirect = ($redirect == 'no') ? 'no' : 'yes';
 401                         $t .= ',redirect='.$redirect;
 402                 }
 403                 $this->mContent = wfMsg( 'missingarticle', $t );
 404
 405                 if ( ! $oldid ) {       # Retrieve current version
 406                         $id = $this->getID();
 407                         if ( 0 == $id ) return;
 408
 409                         $s = $dbr->selectRow( 'cur', $this->getCurContentFields(), array( 'cur_id' => $id ), $fname,
 410                                 $this->getSelectOptions() );
 411                         if ( $s === false ) {
 412                                 return;
 413                         }
 414
 415                         # If we got a redirect, follow it (unless we've been told
 416                         # not to by either the function parameter or the query
 417                         if ( ( 'no' != $redirect ) && ( false == $noredir ) ) {
 418                                 $rt = Title::newFromRedirect( $s->cur_text );
 419                                 # process if title object is valid and not special:userlogout
 420                                 if ( $rt && ! ( $rt->getNamespace() == NS_SPECIAL && $rt->getText() == 'Userlogout' ) ) {
 421                                         # Gotta hand redirects to special pages differently:
 422                                         # Fill the HTTP response "Location" header and ignore
 423                                         # the rest of the page we're on.
 424
 425                                         if ( $rt->getInterwiki() != '' ) {
 426                                                 $wgOut->redirect( $rt->getFullURL() ) ;
 427                                                 return;
 428                                         }
 429                                         if ( $rt->getNamespace() == NS_SPECIAL ) {
 430                                                 $wgOut->redirect( $rt->getFullURL() );
 431                                                 return;
 432                                         }
 433                                         $rid = $rt->getArticleID();
 434                                         if ( 0 != $rid ) {
 435                                                 $redirRow = $dbr->selectRow( 'cur', $this->getCurContentFields(),
 436                                                         array( 'cur_id' => $rid ), $fname, $this->getSelectOptions() );
 437
 438                                                 if ( $redirRow !== false ) {
 439                                                         $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 440                                                         $this->mTitle = $rt;
 441                                                         $s = $redirRow;
 442                                                 }
 443                                         }
 444                                 }
 445                         }
 446
 447                         $this->mContent = $s->cur_text;
 448                         $this->mUser = $s->cur_user;
 449                         $this->mUserText = $s->cur_user_text;
 450                         $this->mComment = $s->cur_comment;
 451                         $this->mCounter = $s->cur_counter;
 452                         $this->mTimestamp = wfTimestamp(TS_MW,$s->cur_timestamp);
 453                         $this->mTouched = wfTimestamp(TS_MW,$s->cur_touched);
 454                         $this->mTitle->mRestrictions = explode( ',', trim( $s->cur_restrictions ) );
 455                         $this->mTitle->mRestrictionsLoaded = true;
 456                 } else { # oldid set, retrieve historical version
 457                         $s = $dbr->getArray( 'old', $this->getOldContentFields(), array( 'old_id' => $oldid ),
 458                                 $fname, $this->getSelectOptions() );
 459                         if ( $s === false ) {
 460                                 return;
 461                         }
 462
 463                         if( $this->mTitle->getNamespace() != $s->old_namespace ||
 464                                 $this->mTitle->getDBkey() != $s->old_title ) {
 465                                 $oldTitle = Title::makeTitle( $s->old_namesapce, $s->old_title );
 466                                 $this->mTitle = $oldTitle;
 467                                 $wgTitle = $oldTitle;
 468                         }
 469                         $this->mContent = Article::getRevisionText( $s );
 470                         $this->mUser = $s->old_user;
 471                         $this->mUserText = $s->old_user_text;
 472                         $this->mComment = $s->old_comment;
 473                         $this->mCounter = 0;
 474                         $this->mTimestamp = wfTimestamp(TS_MW,$s->old_timestamp);
 475                 }
 476                 $this->mContentLoaded = true;
 477                 return $this->mContent;
 478         }
 479
 480         /**
 481          * Gets the article text without using so many damn globals
 482          * Returns false on error
 483         */
 484         function getContentWithoutUsingSoManyDamnGlobals( $oldid = 0, $noredir = false ) {
 485                 global $wgMwRedir;
 486
 487                 if ( $this->mContentLoaded ) {
 488                         return $this->mContent;
 489                 }
 490                 $this->mContent = false;
 491
 492                 $fname = 'Article::getContentWithout';
 493                 $dbr =& $this->getDB();
 494
 495                 if ( ! $oldid ) {       # Retrieve current version
 496                         $id = $this->getID();
 497                         if ( 0 == $id ) {
 498                                 return false;
 499                         }
 500
 501                         $s = $dbr->selectRow( 'cur', $this->getCurContentFields(), array( 'cur_id' => $id ),
 502                                 $fname, $this->getSelectOptions() );
 503                         if ( $s === false ) {
 504                                 return false;
 505                         }
 506
 507                         # If we got a redirect, follow it (unless we've been told
 508                         # not to by either the function parameter or the query
 509                         if ( !$noredir ) {
 510                                 $rt = Title::newFromRedirect( $s->cur_text );
 511                                 if( $rt &&  $rt->getInterwiki() == '' && $rt->getNamespace() != NS_SPECIAL ) {
 512                                         $rid = $rt->getArticleID();
 513                                         if ( 0 != $rid ) {
 514                                                 $redirRow = $dbr->selectRow( 'cur', $this->getCurContentFields(),
 515                                                         array( 'cur_id' => $rid ), $fname, $this->getSelectOptions() );
 516
 517                                                 if ( $redirRow !== false ) {
 518                                                         $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 519                                                         $this->mTitle = $rt;
 520                                                         $s = $redirRow;
 521                                                 }
 522                                         }
 523                                 }
 524                         }
 525
 526                         $this->mContent = $s->cur_text;
 527                         $this->mUser = $s->cur_user;
 528                         $this->mUserText = $s->cur_user_text;
 529                         $this->mComment = $s->cur_comment;
 530                         $this->mCounter = $s->cur_counter;
 531                         $this->mTimestamp = wfTimestamp(TS_MW,$s->cur_timestamp);
 532                         $this->mTouched = wfTimestamp(TS_MW,$s->cur_touched);
 533                         $this->mTitle->mRestrictions = explode( ',', trim( $s->cur_restrictions ) );
 534                         $this->mTitle->mRestrictionsLoaded = true;
 535                 } else { # oldid set, retrieve historical version
 536                         $s = $dbr->selectRow( 'old', $this->getOldContentFields(), array( 'old_id' => $oldid ),
 537                                 $fname, $this->getSelectOptions() );
 538                         if ( $s === false ) {
 539                                 return false;
 540                         }
 541                         $this->mContent = Article::getRevisionText( $s );
 542                         $this->mUser = $s->old_user;
 543                         $this->mUserText = $s->old_user_text;
 544                         $this->mComment = $s->old_comment;
 545                         $this->mCounter = 0;
 546                         $this->mTimestamp = wfTimestamp(TS_MW,$s->old_timestamp);
 547                 }
 548                 $this->mContentLoaded = true;
 549                 return $this->mContent;
 550         }
 551
 552         /**
 553          * Read/write accessor to select FOR UPDATE
 554          */
 555         function forUpdate( $x = NULL ) {
 556                 return wfSetVar( $this->mForUpdate, $x );
 557         }
 558
 559         /**
 560          * Get the database which should be used for reads
 561          */
 562         function &getDB() {
 563                 if ( $this->mForUpdate ) {
 564                         return wfGetDB( DB_MASTER );
 565                 } else {
 566                         return wfGetDB( DB_SLAVE );
 567                 }
 568         }
 569
 570         /**
 571          * Get options for all SELECT statements
 572          * Can pass an option array, to which the class-wide options will be appended
 573          */
 574         function getSelectOptions( $options = '' ) {
 575                 if ( $this->mForUpdate ) {
 576                         if ( $options ) {
 577                                 $options[] = 'FOR UPDATE';
 578                         } else {
 579                                 $options = 'FOR UPDATE';
 580                         }
 581                 }
 582                 return $options;
 583         }
 584
 585         /**
 586          * Return the Article ID
 587          */
 588         function getID() {
 589                 if( $this->mTitle ) {
 590                         return $this->mTitle->getArticleID();
 591                 } else {
 592                         return 0;
 593                 }
 594         }
 595
 596         /*
 597          * @todo document function
 598          */
 599         function getCount() {
 600                 if ( -1 == $this->mCounter ) {
 601                         $id = $this->getID();
 602                         $dbr =& $this->getDB();
 603                         $this->mCounter = $dbr->selectField( 'cur', 'cur_counter', 'cur_id='.$id,
 604                                 'Article::getCount', $this->getSelectOptions() );
 605                 }
 606                 return $this->mCounter;
 607         }
 608
 609         /**
 610          * Would the given text make this article a "good" article (i.e.,
 611          * suitable for including in the article count)?
 612          */
 613         function isCountable( $text ) {
 614                 global $wgUseCommaCount, $wgMwRedir;
 615
 616                 if ( 0 != $this->mTitle->getNamespace() ) { return 0; }
 617                 if ( $wgMwRedir->matchStart( $text ) ) { return 0; }
 618                 $token = ($wgUseCommaCount ? ',' : '[[' );
 619                 if ( false === strstr( $text, $token ) ) { return 0; }
 620                 return 1;
 621         }
 622
 623         /**
 624          * Loads everything from cur except cur_text
 625          * This isn't necessary for all uses, so it's only done if needed.
 626          * @private
 627          */
 628         function loadLastEdit() {
 629                 global $wgOut;
 630                 if ( -1 != $this->mUser ) return;
 631
 632                 $fname = 'Article::loadLastEdit';
 633
 634                 $dbr =& $this->getDB();
 635                 $s = $dbr->getArray( 'cur',
 636                   array( 'cur_user','cur_user_text','cur_timestamp', 'cur_comment','cur_minor_edit' ),
 637                   array( 'cur_id' => $this->getID() ), $fname, $this->getSelectOptions() );
 638
 639                 if ( $s !== false ) {
 640                         $this->mUser = $s->cur_user;
 641                         $this->mUserText = $s->cur_user_text;
 642                         $this->mTimestamp = wfTimestamp(TS_MW,$s->cur_timestamp);
 643                         $this->mComment = $s->cur_comment;
 644                         $this->mMinorEdit = $s->cur_minor_edit;
 645                 }
 646         }
 647
 648         function getTimestamp() {
 649                 $this->loadLastEdit();
 650                 return $this->mTimestamp;
 651         }
 652
 653         function getUser() {
 654                 $this->loadLastEdit();
 655                 return $this->mUser;
 656         }
 657
 658         function getUserText() {
 659                 $this->loadLastEdit();
 660                 return $this->mUserText;
 661         }
 662
 663         function getComment() {
 664                 $this->loadLastEdit();
 665                 return $this->mComment;
 666         }
 667
 668         function getMinorEdit() {
 669                 $this->loadLastEdit();
 670                 return $this->mMinorEdit;
 671         }
 672
 673         function getContributors($limit = 0, $offset = 0) {
 674                 $fname = 'Article::getContributors';
 675
 676                 # XXX: this is expensive; cache this info somewhere.
 677
 678                 $title = $this->mTitle;
 679                 $contribs = array();
 680                 $dbr =& $this->getDB();
 681                 $oldTable = $dbr->tableName( 'old' );
 682                 $userTable = $dbr->tableName( 'user' );
 683                 $encDBkey = $dbr->strencode( $title->getDBkey() );
 684                 $ns = $title->getNamespace();
 685                 $user = $this->getUser();
 686
 687                 $sql = "SELECT old_user, old_user_text, user_real_name, MAX(old_timestamp) as timestamp
 688                         FROM $oldTable LEFT JOIN $userTable ON old_user = user_id
 689                         WHERE old_namespace = $user
 690                         AND old_title = $encDBkey
 691                         AND old_user != $user
 692                         GROUP BY old_user
 693                         ORDER BY timestamp DESC";
 694
 695                 if ($limit > 0) { $sql .= ' LIMIT '.$limit; }
 696                 $sql .= ' '. $this->getSelectOptions();
 697
 698                 $res = $dbr->query($sql, $fname);
 699
 700                 while ( $line = $dbr->fetchObject( $res ) ) {
 701                         $contribs[] = array($line->old_user, $line->old_user_text, $line->user_real_name);
 702                 }
 703
 704                 $dbr->freeResult($res);
 705                 return $contribs;
 706         }
 707
 708         /**
 709          * This is the default action of the script: just view the page of
 710          * the given title.
 711         */
 712         function view() {
 713                 global $wgUser, $wgOut, $wgLang, $wgRequest, $wgMwRedir, $wgOnlySysopsCanPatrol;
 714                 global $wgLinkCache, $IP, $wgEnableParserCache, $wgStylePath, $wgUseRCPatrol;
 715                 $sk = $wgUser->getSkin();
 716
 717                 $fname = 'Article::view';
 718                 wfProfileIn( $fname );
 719                 # Get variables from query string
 720                 $oldid = $wgRequest->getVal( 'oldid' );
 721                 $diff = $wgRequest->getVal( 'diff' );
 722                 $rcid = $wgRequest->getVal( 'rcid' );
 723
 724                 $wgOut->setArticleFlag( true );
 725                 $wgOut->setRobotpolicy( 'index,follow' );
 726                 # If we got diff and oldid in the query, we want to see a
 727                 # diff page instead of the article.
 728
 729                 if ( !is_null( $diff ) ) {
 730                         require_once( 'DifferenceEngine.php' );
 731                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 732                         $de = new DifferenceEngine( $oldid, $diff, $rcid );
 733                         $de->showDiffPage();
 734                         wfProfileOut( $fname );
 735                         if( $diff == 0 ) {
 736                                 # Run view updates for current revision only
 737                                 $this->viewUpdates();
 738                         }
 739                         return;
 740                 }
 741                 if ( empty( $oldid ) && $this->checkTouched() ) {
 742                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 743                                 return;
 744                         } else if ( $this->tryFileCache() ) {
 745                                 # tell wgOut that output is taken care of
 746                                 $wgOut->disable();
 747                                 $this->viewUpdates();
 748                                 return;
 749                         }
 750                 }
 751                 # Should the parser cache be used?
 752                 if ( $wgEnableParserCache && intval($wgUser->getOption( 'stubthreshold' )) == 0 && empty( $oldid ) ) {
 753                         $pcache = true;
 754                 } else {
 755                         $pcache = false;
 756                 }
 757
 758                 $outputDone = false;
 759                 if ( $pcache ) {
 760                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 761                                 $outputDone = true;
 762                         }
 763                 }
 764                 if ( !$outputDone ) {
 765                         $text = $this->getContent( false ); # May change mTitle by following a redirect
 766
 767                         # Another whitelist check in case oldid or redirects are altering the title
 768                         if ( !$this->mTitle->userCanRead() ) {
 769                                 $wgOut->loginToUse();
 770                                 $wgOut->output();
 771                                 exit;
 772                         }
 773
 774
 775                         # We're looking at an old revision
 776
 777                         if ( !empty( $oldid ) ) {
 778                                 $this->setOldSubtitle();
 779                                 $wgOut->setRobotpolicy( 'noindex,follow' );
 780                         }
 781                         if ( '' != $this->mRedirectedFrom ) {
 782                                 $sk = $wgUser->getSkin();
 783                                 $redir = $sk->makeKnownLink( $this->mRedirectedFrom, '',
 784                                   'redirect=no' );
 785                                 $s = wfMsg( 'redirectedfrom', $redir );
 786                                 $wgOut->setSubtitle( $s );
 787
 788                                 # Can't cache redirects
 789                                 $pcache = false;
 790                         }
 791
 792                         # wrap user css and user js in pre and don't parse
 793                         # XXX: use $this->mTitle->usCssJsSubpage() when php is fixed/ a workaround is found
 794                         if (
 795                                 $this->mTitle->getNamespace() == NS_USER &&
 796                                 preg_match('/\\/[\\w]+\\.(css|js)$/', $this->mTitle->getDBkey())
 797                         ) {
 798                                 $wgOut->addWikiText( wfMsg('clearyourcache'));
 799                                 $wgOut->addHTML( '<pre>'.htmlspecialchars($this->mContent)."\n</pre>" );
 800                         } else if ( $rt = Title::newFromRedirect( $text ) ) {
 801                                 # Display redirect
 802                                 $imageUrl = $wgStylePath.'/images/redirect.png';
 803                                 $targetUrl = $rt->escapeLocalURL();
 804                                 $titleText = htmlspecialchars( $rt->getPrefixedText() );
 805                                 $link = $sk->makeLinkObj( $rt );
 806                                 $wgOut->addHTML( '<img valign="center" src="'.$imageUrl.'">' .
 807                                   '<span class="redirectText">'.$link.'</span>' );
 808                         } else if ( $pcache ) {
 809                                 # Display content and save to parser cache
 810                                 $wgOut->addPrimaryWikiText( $text, $this );
 811                         } else {
 812                                 # Display content, don't attempt to save to parser cache
 813                                 $wgOut->addWikiText( $text );
 814                         }
 815                 }
 816                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 817                 # If we have been passed an &rcid= parameter, we want to give the user a
 818                 # chance to mark this new article as patrolled.
 819                 if ( $wgUseRCPatrol && !is_null ( $rcid ) && $rcid != 0 && $wgUser->getID() != 0 &&
 820                      ( $wgUser->isSysop() || !$wgOnlySysopsCanPatrol ) )
 821                 {
 822                         $wgOut->addHTML( wfMsg ( 'markaspatrolledlink',
 823                                 $sk->makeKnownLinkObj ( $this->mTitle, wfMsg ( 'markaspatrolledtext' ),
 824                                         'action=markpatrolled&rcid='.$rcid )
 825                          ) );
 826                 }
 827
 828                 # Put link titles into the link cache
 829                 $wgOut->transformBuffer();
 830
 831                 # Add link titles as META keywords
 832                 $wgOut->addMetaTags() ;
 833
 834                 $this->viewUpdates();
 835                 wfProfileOut( $fname );
 836         }
 837
 838         /**
 839          * Theoretically we could defer these whole insert and update
 840          * functions for after display, but that's taking a big leap
 841          * of faith, and we want to be able to report database
 842          * errors at some point.
 843          * @private
 844          */
 845         function insertNewArticle( $text, $summary, $isminor, $watchthis ) {
 846                 global $wgOut, $wgUser, $wgMwRedir;
 847                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 848
 849                 $fname = 'Article::insertNewArticle';
 850
 851                 $this->mCountAdjustment = $this->isCountable( $text );
 852
 853                 $ns = $this->mTitle->getNamespace();
 854                 $ttl = $this->mTitle->getDBkey();
 855                 $text = $this->preSaveTransform( $text );
 856                 if ( $wgMwRedir->matchStart( $text ) ) { $redir = 1; }
 857                 else { $redir = 0; }
 858
 859                 $now = wfTimestampNow();
 860                 $won = wfInvertTimestamp( $now );
 861                 wfSeedRandom();
 862                 $rand = number_format( mt_rand() / mt_getrandmax(), 12, '.', '' );
 863                 $dbw =& wfGetDB( DB_MASTER );
 864
 865                 $cur_id = $dbw->nextSequenceValue( 'cur_cur_id_seq' );
 866
 867                 $isminor = ( $isminor && $wgUser->getID() ) ? 1 : 0;
 868
 869                 $dbw->insertArray( 'cur', array(
 870                         'cur_id' => $cur_id,
 871                         'cur_namespace' => $ns,
 872                         'cur_title' => $ttl,
 873                         'cur_text' => $text,
 874                         'cur_comment' => $summary,
 875                         'cur_user' => $wgUser->getID(),
 876                         'cur_timestamp' => $dbw->timestamp($now),
 877                         'cur_minor_edit' => $isminor,
 878                         'cur_counter' => 0,
 879                         'cur_restrictions' => '',
 880                         'cur_user_text' => $wgUser->getName(),
 881                         'cur_is_redirect' => $redir,
 882                         'cur_is_new' => 1,
 883                         'cur_random' => $rand,
 884                         'cur_touched' => $dbw->timestamp($now),
 885                         'inverse_timestamp' => $won,
 886                 ), $fname );
 887
 888                 $newid = $dbw->insertId();
 889                 $this->mTitle->resetArticleID( $newid );
 890
 891                 Article::onArticleCreate( $this->mTitle );
 892                 RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary );
 893
 894                 if ($watchthis) {
 895                         if(!$this->mTitle->userIsWatching()) $this->watch();
 896                 } else {
 897                         if ( $this->mTitle->userIsWatching() ) {
 898                                 $this->unwatch();
 899                         }
 900                 }
 901
 902                 # The talk page isn't in the regular link tables, so we need to update manually:
 903                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 904                 $dbw->updateArray( 'cur', array('cur_touched' => $dbw->timestamp($now) ),
 905                         array(  'cur_namespace' => $talkns, 'cur_title' => $ttl ), $fname );
 906
 907                 # standard deferred updates
 908                 $this->editUpdates( $text );
 909
 910                 $this->showArticle( $text, wfMsg( 'newarticle' ) );
 911         }
 912
 913
 914         /**
 915          * Side effects: loads last edit
 916          */
 917         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = '') {
 918                 $this->loadLastEdit();
 919                 $oldtext = $this->getContent( true );
 920                 if ($section != '') {
 921                         if($section=='new') {
 922                                 if($summary) $subject="== {$summary} ==\n\n";
 923                                 $text=$oldtext."\n\n".$subject.$text;
 924                         } else {
 925
 926                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 927                                 # comments to be stripped as well)
 928                                 $striparray=array();
 929                                 $parser=new Parser();
 930                                 $parser->mOutputType=OT_WIKI;
 931                                 $oldtext=$parser->strip($oldtext, $striparray, true);
 932
 933                                 # now that we can be sure that no pseudo-sections are in the source,
 934                                 # split it up
 935                                 # Unfortunately we can't simply do a preg_replace because that might
 936                                 # replace the wrong section, so we have to use the section counter instead
 937                                 $secs=preg_split('/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 938                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 939                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 940
 941                                 # section 0 is top (intro) section
 942                                 if($section!=0) {
 943
 944                                         # headline of old section - we need to go through this section
 945                                         # to determine if there are any subsections that now need to
 946                                         # be erased, as the mother section has been replaced with
 947                                         # the text of all subsections.
 948                                         $headline=$secs[$section*2-1];
 949                                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 950                                         $hlevel=$matches[1];
 951
 952                                         # determine headline level for wikimarkup headings
 953                                         if(strpos($hlevel,'=')!==false) {
 954                                                 $hlevel=strlen($hlevel);
 955                                         }
 956
 957                                         $secs[$section*2-1]=''; // erase old headline
 958                                         $count=$section+1;
 959                                         $break=false;
 960                                         while(!empty($secs[$count*2-1]) && !$break) {
 961
 962                                                 $subheadline=$secs[$count*2-1];
 963                                                 preg_match(
 964                                                  '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 965                                                 $subhlevel=$matches[1];
 966                                                 if(strpos($subhlevel,'=')!==false) {
 967                                                         $subhlevel=strlen($subhlevel);
 968                                                 }
 969                                                 if($subhlevel > $hlevel) {
 970                                                         // erase old subsections
 971                                                         $secs[$count*2-1]='';
 972                                                         $secs[$count*2]='';
 973                                                 }
 974                                                 if($subhlevel <= $hlevel) {
 975                                                         $break=true;
 976                                                 }
 977                                                 $count++;
 978
 979                                         }
 980
 981                                 }
 982                                 $text=join('',$secs);
 983                                 # reinsert the stuff that we stripped out earlier
 984                                 $text=$parser->unstrip($text,$striparray);
 985                                 $text=$parser->unstripNoWiki($text,$striparray);
 986                         }
 987
 988                 }
 989                 return $text;
 990         }
 991
 992         /**
 993          * @todo document this function
 994          */
 995         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
 996                 global $wgOut, $wgUser;
 997                 global $wgDBtransactions, $wgMwRedir;
 998                 global $wgUseSquid, $wgInternalServer;
 999
1000                 $fname = 'Article::updateArticle';
1001                 $good = true;
1002
1003                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
1004                 if ( $minor && $wgUser->getID() ) { $me2 = 1; } else { $me2 = 0; }
1005                 if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ')[^\\n]+)/i', $text, $m ) ) {
1006                         $redir = 1;
1007                         $text = $m[1] . "\n"; # Remove all content but redirect
1008                 }
1009                 else { $redir = 0; }
1010
1011                 $text = $this->preSaveTransform( $text );
1012                 $dbw =& wfGetDB( DB_MASTER );
1013
1014                 # Update article, but only if changed.
1015
1016                 # It's important that we either rollback or complete, otherwise an attacker could
1017                 # overwrite cur entries by sending precisely timed user aborts. Random bored users
1018                 # could conceivably have the same effect, especially if cur is locked for long periods.
1019                 if( $wgDBtransactions ) {
1020                         $dbw->query( 'BEGIN', $fname );
1021                 } else {
1022                         $userAbort = ignore_user_abort( true );
1023                 }
1024
1025                 $oldtext = $this->getContent( true );
1026
1027                 if ( 0 != strcmp( $text, $oldtext ) ) {
1028                         $this->mCountAdjustment = $this->isCountable( $text )
1029                           - $this->isCountable( $oldtext );
1030                         $now = wfTimestampNow();
1031                         $won = wfInvertTimestamp( $now );
1032
1033                         # First update the cur row
1034                         $dbw->updateArray( 'cur',
1035                                 array( /* SET */
1036                                         'cur_text' => $text,
1037                                         'cur_comment' => $summary,
1038                                         'cur_minor_edit' => $me2,
1039                                         'cur_user' => $wgUser->getID(),
1040                                         'cur_timestamp' => $dbw->timestamp($now),
1041                                         'cur_user_text' => $wgUser->getName(),
1042                                         'cur_is_redirect' => $redir,
1043                                         'cur_is_new' => 0,
1044                                         'cur_touched' => $dbw->timestamp($now),
1045                                         'inverse_timestamp' => $won
1046                                 ), array( /* WHERE */
1047                                         'cur_id' => $this->getID(),
1048                                         'cur_timestamp' => $dbw->timestamp($this->getTimestamp())
1049                                 ), $fname
1050                         );
1051
1052                         if( $dbw->affectedRows() == 0 ) {
1053                                 /* Belated edit conflict! Run away!! */
1054                                 $good = false;
1055                         } else {
1056                                 # Now insert the previous revision into old
1057
1058                                 # This overwrites $oldtext if revision compression is on
1059                                 $flags = Article::compressRevisionText( $oldtext );
1060
1061                                 $dbw->insertArray( 'old',
1062                                         array(
1063                                                 'old_id' => $dbw->nextSequenceValue( 'old_old_id_seq' ),
1064                                                 'old_namespace' => $this->mTitle->getNamespace(),
1065                                                 'old_title' => $this->mTitle->getDBkey(),
1066                                                 'old_text' => $oldtext,
1067                                                 'old_comment' => $this->getComment(),
1068                                                 'old_user' => $this->getUser(),
1069                                                 'old_user_text' => $this->getUserText(),
1070                                                 'old_timestamp' => $dbw->timestamp($this->getTimestamp()),
1071                                                 'old_minor_edit' => $me1,
1072                                                 'inverse_timestamp' => wfInvertTimestamp( $this->getTimestamp() ),
1073                                                 'old_flags' => $flags,
1074                                         ), $fname
1075                                 );
1076
1077                                 $oldid = $dbw->insertId();
1078
1079                                 $bot = (int)($wgUser->isBot() || $forceBot);
1080                                 RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
1081                                         $oldid, $this->getTimestamp(), $bot );
1082                                 Article::onArticleEdit( $this->mTitle );
1083                         }
1084                 }
1085
1086                 if( $wgDBtransactions ) {
1087                         $dbw->query( 'COMMIT', $fname );
1088                 } else {
1089                         ignore_user_abort( $userAbort );
1090                 }
1091
1092                 if ( $good ) {
1093                 if ($watchthis) {
1094                         if (!$this->mTitle->userIsWatching()) $this->watch();
1095                 } else {
1096                         if ( $this->mTitle->userIsWatching() ) {
1097                                 $this->unwatch();
1098                         }
1099                 }
1100                 # standard deferred updates
1101                 $this->editUpdates( $text );
1102
1103
1104                 $urls = array();
1105                 # Template namespace
1106                 # Purge all articles linking here
1107                 if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
1108                         $titles = $this->mTitle->getLinksTo();
1109                         Title::touchArray( $titles );
1110                         if ( $wgUseSquid ) {
1111                                         foreach ( $titles as $title ) {
1112                                                 $urls[] = $title->getInternalURL();
1113                                         }
1114                         }
1115                 }
1116
1117                 # Squid updates
1118                 if ( $wgUseSquid ) {
1119                         $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
1120                         $u = new SquidUpdate( $urls );
1121                         $u->doUpdate();
1122                 }
1123
1124                 $this->showArticle( $text, wfMsg( 'updated' ), $sectionanchor );
1125                 }
1126                 return $good;
1127         }
1128
1129         /**
1130          * After we've either updated or inserted the article, update
1131          * the link tables and redirect to the new page.
1132          */
1133         function showArticle( $text, $subtitle , $sectionanchor = '' ) {
1134                 global $wgOut, $wgUser, $wgLinkCache;
1135                 global $wgMwRedir;
1136
1137                 $wgLinkCache = new LinkCache();
1138                 # Select for update
1139                 $wgLinkCache->forUpdate( true );
1140
1141                 # Get old version of link table to allow incremental link updates
1142                 $wgLinkCache->preFill( $this->mTitle );
1143                 $wgLinkCache->clear();
1144
1145                 # Parse the text and replace links with placeholders
1146                 $wgOut = new OutputPage();
1147                 $wgOut->addWikiText( $text );
1148
1149                 # Look up the links in the DB and add them to the link cache
1150                 $wgOut->transformBuffer( RLH_FOR_UPDATE );
1151
1152                 if( $wgMwRedir->matchStart( $text ) )
1153                         $r = 'redirect=no';
1154                 else
1155                         $r = '';
1156                 $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
1157         }
1158
1159         /**
1160          * Validate article
1161          * @todo document this function a bit more
1162          */
1163         function validate () {
1164                 global $wgOut, $wgUseValidation;
1165                 if( $wgUseValidation ) {
1166                         require_once ( 'SpecialValidate.php' ) ;
1167                         $wgOut->setPagetitle( wfMsg( 'validate' ) . ': ' . $this->mTitle->getPrefixedText() );
1168                         $wgOut->setRobotpolicy( 'noindex,follow' );
1169                         if( $this->mTitle->getNamespace() != 0 ) {
1170                                 $wgOut->addHTML( wfMsg( 'val_validate_article_namespace_only' ) );
1171                                 return;
1172                         }
1173                         $v = new Validation;
1174                         $v->validate_form( $this->mTitle->getDBkey() );
1175                 } else {
1176                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
1177                 }
1178         }
1179
1180         /**
1181          * Mark this particular edit as patrolled
1182          */
1183         function markpatrolled() {
1184                 global $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgUseRCPatrol, $wgUser;
1185                 $wgOut->setRobotpolicy( 'noindex,follow' );
1186
1187                 if ( !$wgUseRCPatrol )
1188                 {
1189                         $wgOut->errorpage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1190                         return;
1191                 }
1192                 if ( $wgUser->getID() == 0 )
1193                 {
1194                         $wgOut->loginToUse();
1195                         return;
1196                 }
1197                 if ( $wgOnlySysopsCanPatrol && !$wgUser->isSysop() )
1198                 {
1199                         $wgOut->sysopRequired();
1200                         return;
1201                 }
1202                 $rcid = $wgRequest->getVal( 'rcid' );
1203                 if ( !is_null ( $rcid ) )
1204                 {
1205                         RecentChange::markPatrolled( $rcid );
1206                         $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
1207                         $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
1208                         $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1209                 }
1210                 else
1211                 {
1212                         $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1213                 }
1214         }
1215
1216
1217         /**
1218          * Add or remove this page to my watchlist based on value of $add
1219          */
1220         function watch( $add = true ) {
1221                 global $wgUser, $wgOut, $wgLang;
1222                 global $wgDeferredUpdateList;
1223
1224                 if ( 0 == $wgUser->getID() ) {
1225                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1226                         return;
1227                 }
1228                 if ( wfReadOnly() ) {
1229                         $wgOut->readOnlyPage();
1230                         return;
1231                 }
1232                 if( $add )
1233                         $wgUser->addWatch( $this->mTitle );
1234                 else
1235                         $wgUser->removeWatch( $this->mTitle );
1236
1237                 $wgOut->setPagetitle( wfMsg( $add ? 'addedwatch' : 'removedwatch' ) );
1238                 $wgOut->setRobotpolicy( 'noindex,follow' );
1239
1240                 $sk = $wgUser->getSkin() ;
1241                 $link = $this->mTitle->getPrefixedText();
1242
1243                 if($add)
1244                         $text = wfMsg( 'addedwatchtext', $link );
1245                 else
1246                         $text = wfMsg( 'removedwatchtext', $link );
1247                 $wgOut->addWikiText( $text );
1248
1249                 $up = new UserUpdate();
1250                 array_push( $wgDeferredUpdateList, $up );
1251
1252                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1253         }
1254
1255         /**
1256          * Stop watching a page, it act just like a call to watch(false)
1257          */
1258         function unwatch() {
1259                 $this->watch( false );
1260         }
1261
1262         /**
1263          * protect a page
1264          */
1265         function protect( $limit = 'sysop' ) {
1266                 global $wgUser, $wgOut, $wgRequest;
1267
1268                 if ( ! $wgUser->isSysop() ) {
1269                         $wgOut->sysopRequired();
1270                         return;
1271                 }
1272                 if ( wfReadOnly() ) {
1273                         $wgOut->readOnlyPage();
1274                         return;
1275                 }
1276                 $id = $this->mTitle->getArticleID();
1277                 if ( 0 == $id ) {
1278                         $wgOut->fatalError( wfMsg( 'badarticleerror' ) );
1279                         return;
1280                 }
1281
1282                 $confirm = $wgRequest->getBool( 'wpConfirmProtect' ) && $wgRequest->wasPosted();
1283                 $reason = $wgRequest->getText( 'wpReasonProtect' );
1284
1285                 if ( $confirm ) {
1286                         $dbw =& wfGetDB( DB_MASTER );
1287                         $dbw->updateArray( 'cur',
1288                                 array( /* SET */
1289                                         'cur_touched' => $dbw->timestamp(),
1290                                         'cur_restrictions' => (string)$limit
1291                                 ), array( /* WHERE */
1292                                         'cur_id' => $id
1293                                 ), 'Article::protect'
1294                         );
1295
1296                         $log = new LogPage( 'protect' );
1297                         if ( $limit === '' ) {
1298                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1299                         } else {
1300                                         $log->addEntry( 'protect', $this->mTitle, $reason );
1301                         }
1302                         $wgOut->redirect( $this->mTitle->getFullURL() );
1303                         return;
1304                 } else {
1305                         $reason = htmlspecialchars( wfMsg( 'protectreason' ) );
1306                         return $this->confirmProtect( '', $reason, $limit );
1307                 }
1308         }
1309
1310         /**
1311          * Output protection confirmation dialog
1312          */
1313         function confirmProtect( $par, $reason, $limit = 'sysop'  ) {
1314                 global $wgOut;
1315
1316                 wfDebug( "Article::confirmProtect\n" );
1317
1318                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1319                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1320
1321                 $check = '';
1322                 $protcom = '';
1323
1324                 if ( $limit === '' ) {
1325                         $wgOut->setPageTitle( wfMsg( 'confirmunprotect' ) );
1326                         $wgOut->setSubtitle( wfMsg( 'unprotectsub', $sub ) );
1327                         $wgOut->addWikiText( wfMsg( 'confirmunprotecttext' ) );
1328                         $check = htmlspecialchars( wfMsg( 'confirmunprotect' ) );
1329                         $protcom = htmlspecialchars( wfMsg( 'unprotectcomment' ) );
1330                         $formaction = $this->mTitle->escapeLocalURL( 'action=unprotect' . $par );
1331                 } else {
1332                         $wgOut->setPageTitle( wfMsg( 'confirmprotect' ) );
1333                         $wgOut->setSubtitle( wfMsg( 'protectsub', $sub ) );
1334                         $wgOut->addWikiText( wfMsg( 'confirmprotecttext' ) );
1335                         $check = htmlspecialchars( wfMsg( 'confirmprotect' ) );
1336                         $protcom = htmlspecialchars( wfMsg( 'protectcomment' ) );
1337                         $formaction = $this->mTitle->escapeLocalURL( 'action=protect' . $par );
1338                 }
1339
1340                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1341
1342                 $wgOut->addHTML( "
1343 <form id='protectconfirm' method='post' action=\"{$formaction}\">
1344         <table border='0'>
1345                 <tr>
1346                         <td align='right'>
1347                                 <label for='wpReasonProtect'>{$protcom}:</label>
1348                         </td>
1349                         <td align='left'>
1350                                 <input type='text' size='60' name='wpReasonProtect' id='wpReasonProtect' value=\"" . htmlspecialchars( $reason ) . "\" />
1351                         </td>
1352                 </tr>
1353                 <tr>
1354                         <td>&nbsp;</td>
1355                 </tr>
1356                 <tr>
1357                         <td align='right'>
1358                                 <input type='checkbox' name='wpConfirmProtect' value='1' id='wpConfirmProtect' />
1359                         </td>
1360                         <td>
1361                                 <label for='wpConfirmProtect'>{$check}</label>
1362                         </td>
1363                 </tr>
1364                 <tr>
1365                         <td>&nbsp;</td>
1366                         <td>
1367                                 <input type='submit' name='wpConfirmProtectB' value=\"{$confirm}\" />
1368                         </td>
1369                 </tr>
1370         </table>
1371 </form>\n" );
1372
1373                 $wgOut->returnToMain( false );
1374         }
1375
1376         /**
1377          * Unprotect the pages
1378          */
1379         function unprotect() {
1380                 return $this->protect( '' );
1381         }
1382
1383         /*
1384          * UI entry point for page deletion
1385          */
1386         function delete() {
1387                 global $wgUser, $wgOut, $wgMessageCache, $wgRequest;
1388                 $fname = 'Article::delete';
1389                 $confirm = $wgRequest->getBool( 'wpConfirm' ) && $wgRequest->wasPosted();
1390                 $reason = $wgRequest->getText( 'wpReason' );
1391
1392                 # This code desperately needs to be totally rewritten
1393
1394                 # Check permissions
1395                 if ( ( ! $wgUser->isSysop() ) ) {
1396                         $wgOut->sysopRequired();
1397                         return;
1398                 }
1399                 if ( wfReadOnly() ) {
1400                         $wgOut->readOnlyPage();
1401                         return;
1402                 }
1403
1404                 # Better double-check that it hasn't been deleted yet!
1405                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1406                 if ( ( '' == trim( $this->mTitle->getText() ) )
1407                   or ( $this->mTitle->getArticleId() == 0 ) ) {
1408                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1409                         return;
1410                 }
1411
1412                 if ( $confirm ) {
1413                         $this->doDelete( $reason );
1414                         return;
1415                 }
1416
1417                 # determine whether this page has earlier revisions
1418                 # and insert a warning if it does
1419                 # we select the text because it might be useful below
1420                 $dbr =& $this->getDB();
1421                 $ns = $this->mTitle->getNamespace();
1422                 $title = $this->mTitle->getDBkey();
1423                 $old = $dbr->getArray( 'old',
1424                         array( 'old_text', 'old_flags' ),
1425                         array(
1426                                 'old_namespace' => $ns,
1427                                 'old_title' => $title,
1428                         ), $fname, $this->getSelectOptions( array( 'ORDER BY' => 'inverse_timestamp' ) )
1429                 );
1430
1431                 if( $old !== false && !$confirm ) {
1432                         $skin=$wgUser->getSkin();
1433                         $wgOut->addHTML('<b>'.wfMsg('historywarning'));
1434                         $wgOut->addHTML( $skin->historyLink() .'</b>');
1435                 }
1436
1437                 # Fetch cur_text
1438                 $s = $dbr->getArray( 'cur',
1439                         array( 'cur_text' ),
1440                         array(
1441                                 'cur_namespace' => $ns,
1442                                 'cur_title' => $title,
1443                         ), $fname, $this->getSelectOptions()
1444                 );
1445
1446                 if( $s !== false ) {
1447                         # if this is a mini-text, we can paste part of it into the deletion reason
1448
1449                         #if this is empty, an earlier revision may contain "useful" text
1450                         $blanked = false;
1451                         if($s->cur_text != '') {
1452                                 $text=$s->cur_text;
1453                         } else {
1454                                 if($old) {
1455                                         $text = Article::getRevisionText( $old );
1456                                         $blanked = true;
1457                                 }
1458
1459                         }
1460
1461                         $length=strlen($text);
1462
1463                         # this should not happen, since it is not possible to store an empty, new
1464                         # page. Let's insert a standard text in case it does, though
1465                         if($length == 0 && $reason === '') {
1466                                 $reason = wfMsg('exblank');
1467                         }
1468
1469                         if($length < 500 && $reason === '') {
1470
1471                                 # comment field=255, let's grep the first 150 to have some user
1472                                 # space left
1473                                 $text=substr($text,0,150);
1474                                 # let's strip out newlines and HTML tags
1475                                 $text=preg_replace('/\"/',"'",$text);
1476                                 $text=preg_replace('/\</','&lt;',$text);
1477                                 $text=preg_replace('/\>/','&gt;',$text);
1478                                 $text=preg_replace("/[\n\r]/",'',$text);
1479                                 if(!$blanked) {
1480                                         $reason=wfMsg('excontent'). " '".$text;
1481                                 } else {
1482                                         $reason=wfMsg('exbeforeblank') . " '".$text;
1483                                 }
1484                                 if($length>150) { $reason .= '...'; } # we've only pasted part of the text
1485                                 $reason.="'";
1486                         }
1487                 }
1488
1489                 return $this->confirmDelete( '', $reason );
1490         }
1491
1492         /**
1493          * Output deletion confirmation dialog
1494          */
1495         function confirmDelete( $par, $reason ) {
1496                 global $wgOut;
1497
1498                 wfDebug( "Article::confirmDelete\n" );
1499
1500                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1501                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1502                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1503                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1504
1505                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1506
1507                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1508                 $check = htmlspecialchars( wfMsg( 'confirmcheck' ) );
1509                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1510
1511                 $wgOut->addHTML( "
1512 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1513         <table border='0'>
1514                 <tr>
1515                         <td align='right'>
1516                                 <label for='wpReason'>{$delcom}:</label>
1517                         </td>
1518                         <td align='left'>
1519                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1520                         </td>
1521                 </tr>
1522                 <tr>
1523                         <td>&nbsp;</td>
1524                 </tr>
1525                 <tr>
1526                         <td align='right'>
1527                                 <input type='checkbox' name='wpConfirm' value='1' id='wpConfirm' />
1528                         </td>
1529                         <td>
1530                                 <label for='wpConfirm'>{$check}</label>
1531                         </td>
1532                 </tr>
1533                 <tr>
1534                         <td>&nbsp;</td>
1535                         <td>
1536                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1537                         </td>
1538                 </tr>
1539         </table>
1540 </form>\n" );
1541
1542                 $wgOut->returnToMain( false );
1543         }
1544
1545
1546         /**
1547          * Perform a deletion and output success or failure messages
1548          */
1549         function doDelete( $reason ) {
1550                 global $wgOut, $wgUser, $wgLang;
1551                 $fname = 'Article::doDelete';
1552                 wfDebug( $fname."\n" );
1553
1554                 if ( $this->doDeleteArticle( $reason ) ) {
1555                         $deleted = $this->mTitle->getPrefixedText();
1556
1557                         $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1558                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
1559
1560                         $sk = $wgUser->getSkin();
1561                         $loglink = $sk->makeKnownLink( $wgLang->getNsText( NS_PROJECT ) .
1562                           ':' . wfMsg( 'dellogpage' ), wfMsg( 'deletionlog' ) );
1563
1564                         $text = wfMsg( 'deletedtext', $deleted, $loglink );
1565
1566                         $wgOut->addHTML( '<p>' . $text . "</p>\n" );
1567                         $wgOut->returnToMain( false );
1568                 } else {
1569                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1570                 }
1571         }
1572
1573         /**
1574          * Back-end article deletion
1575          * Deletes the article with database consistency, writes logs, purges caches
1576          * Returns success
1577          */
1578         function doDeleteArticle( $reason ) {
1579                 global $wgUser, $wgLang;
1580                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
1581
1582                 $fname = 'Article::doDeleteArticle';
1583                 wfDebug( $fname."\n" );
1584
1585                 $dbw =& wfGetDB( DB_MASTER );
1586                 $ns = $this->mTitle->getNamespace();
1587                 $t = $this->mTitle->getDBkey();
1588                 $id = $this->mTitle->getArticleID();
1589
1590                 if ( $t == '' || $id == 0 ) {
1591                         return false;
1592                 }
1593
1594                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
1595                 array_push( $wgDeferredUpdateList, $u );
1596
1597                 $linksTo = $this->mTitle->getLinksTo();
1598
1599                 # Squid purging
1600                 if ( $wgUseSquid ) {
1601                         $urls = array(
1602                                 $this->mTitle->getInternalURL(),
1603                                 $this->mTitle->getInternalURL( 'history' )
1604                         );
1605                         foreach ( $linksTo as $linkTo ) {
1606                                 $urls[] = $linkTo->getInternalURL();
1607                         }
1608
1609                         $u = new SquidUpdate( $urls );
1610                         array_push( $wgDeferredUpdateList, $u );
1611
1612                 }
1613
1614                 # Client and file cache invalidation
1615                 Title::touchArray( $linksTo );
1616
1617                 # Move article and history to the "archive" table
1618                 $archiveTable = $dbw->tableName( 'archive' );
1619                 $oldTable = $dbw->tableName( 'old' );
1620                 $curTable = $dbw->tableName( 'cur' );
1621                 $recentchangesTable = $dbw->tableName( 'recentchanges' );
1622                 $linksTable = $dbw->tableName( 'links' );
1623                 $brokenlinksTable = $dbw->tableName( 'brokenlinks' );
1624
1625                 $dbw->insertSelect( 'archive', 'cur',
1626                         array(
1627                                 'ar_namespace' => 'cur_namespace',
1628                                 'ar_title' => 'cur_title',
1629                                 'ar_text' => 'cur_text',
1630                                 'ar_comment' => 'cur_comment',
1631                                 'ar_user' => 'cur_user',
1632                                 'ar_user_text' => 'cur_user_text',
1633                                 'ar_timestamp' => 'cur_timestamp',
1634                                 'ar_minor_edit' => 'cur_minor_edit',
1635                                 'ar_flags' => 0,
1636                         ), array(
1637                                 'cur_namespace' => $ns,
1638                                 'cur_title' => $t,
1639                         ), $fname
1640                 );
1641
1642                 $dbw->insertSelect( 'archive', 'old',
1643                         array(
1644                                 'ar_namespace' => 'old_namespace',
1645                                 'ar_title' => 'old_title',
1646                                 'ar_text' => 'old_text',
1647                                 'ar_comment' => 'old_comment',
1648                                 'ar_user' => 'old_user',
1649                                 'ar_user_text' => 'old_user_text',
1650                                 'ar_timestamp' => 'old_timestamp',
1651                                 'ar_minor_edit' => 'old_minor_edit',
1652                                 'ar_flags' => 'old_flags'
1653                         ), array(
1654                                 'old_namespace' => $ns,
1655                                 'old_title' => $t,
1656                         ), $fname
1657                 );
1658
1659                 # Now that it's safely backed up, delete it
1660
1661                 $dbw->delete( 'cur', array( 'cur_namespace' => $ns, 'cur_title' => $t ), $fname );
1662                 $dbw->delete( 'old', array( 'old_namespace' => $ns, 'old_title' => $t ), $fname );
1663                 $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), $fname );
1664
1665                 # Finally, clean up the link tables
1666                 $t = $this->mTitle->getPrefixedDBkey();
1667
1668                 Article::onArticleDelete( $this->mTitle );
1669
1670                 # Insert broken links
1671                 $brokenLinks = array();
1672                 foreach ( $linksTo as $titleObj ) {
1673                         # Get article ID. Efficient because it was loaded into the cache by getLinksTo().
1674                         $linkID = $titleObj->getArticleID();
1675                         $brokenLinks[] = array( 'bl_from' => $linkID, 'bl_to' => $t );
1676                 }
1677                 $dbw->insertArray( 'brokenlinks', $brokenLinks, $fname, 'IGNORE' );
1678
1679                 # Delete live links
1680                 $dbw->delete( 'links', array( 'l_to' => $id ) );
1681                 $dbw->delete( 'links', array( 'l_from' => $id ) );
1682                 $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
1683                 $dbw->delete( 'brokenlinks', array( 'bl_from' => $id ) );
1684                 $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
1685
1686                 # Log the deletion
1687                 $log = new LogPage( 'delete' );
1688                 $log->addEntry( 'delete', $this->mTitle, $reason );
1689
1690                 # Clear the cached article id so the interface doesn't act like we exist
1691                 $this->mTitle->resetArticleID( 0 );
1692                 $this->mTitle->mArticleID = 0;
1693                 return true;
1694         }
1695
1696         /**
1697          * Revert a modification
1698          */
1699         function rollback() {
1700                 global $wgUser, $wgLang, $wgOut, $wgRequest;
1701                 $fname = 'Article::rollback';
1702
1703                 if ( ! $wgUser->isSysop() ) {
1704                         $wgOut->sysopRequired();
1705                         return;
1706                 }
1707                 if ( wfReadOnly() ) {
1708                         $wgOut->readOnlyPage( $this->getContent( true ) );
1709                         return;
1710                 }
1711                 $dbw =& wfGetDB( DB_MASTER );
1712
1713                 # Enhanced rollback, marks edits rc_bot=1
1714                 $bot = $wgRequest->getBool( 'bot' );
1715
1716                 # Replace all this user's current edits with the next one down
1717                 $tt = $this->mTitle->getDBKey();
1718                 $n = $this->mTitle->getNamespace();
1719
1720                 # Get the last editor, lock table exclusively
1721                 $s = $dbw->getArray( 'cur',
1722                         array( 'cur_id','cur_user','cur_user_text','cur_comment' ),
1723                         array( 'cur_title' => $tt, 'cur_namespace' => $n ),
1724                         $fname, 'FOR UPDATE'
1725                 );
1726                 if( $s === false ) {
1727                         # Something wrong
1728                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
1729                         return;
1730                 }
1731                 $ut = $dbw->strencode( $s->cur_user_text );
1732                 $uid = $s->cur_user;
1733                 $pid = $s->cur_id;
1734
1735                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
1736                 if( $from != $s->cur_user_text ) {
1737                         $wgOut->setPageTitle(wfmsg('rollbackfailed'));
1738                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
1739                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
1740                                 htmlspecialchars( $from ),
1741                                 htmlspecialchars( $s->cur_user_text ) ) );
1742                         if($s->cur_comment != '') {
1743                                 $wgOut->addHTML(
1744                                         wfMsg('editcomment',
1745                                         htmlspecialchars( $s->cur_comment ) ) );
1746                         }
1747                         return;
1748                 }
1749
1750                 # Get the last edit not by this guy
1751                 $s = $dbw->getArray( 'old',
1752                         array( 'old_text','old_user','old_user_text','old_timestamp','old_flags' ),
1753                         array(
1754                                 'old_namespace' => $n,
1755                                 'old_title' => $tt,
1756                                 "old_user <> {$uid} OR old_user_text <> '{$ut}'"
1757                         ), $fname, array( 'FOR UPDATE', 'USE INDEX' => 'name_title_timestamp' )
1758                 );
1759                 if( $s === false ) {
1760                         # Something wrong
1761                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
1762                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
1763                         return;
1764                 }
1765
1766                 if ( $bot ) {
1767                         # Mark all reverted edits as bot
1768                         $dbw->updateArray( 'recentchanges',
1769                                 array( /* SET */
1770                                         'rc_bot' => 1
1771                                 ), array( /* WHERE */
1772                                         'rc_user' => $uid,
1773                                         "rc_timestamp > '{$s->old_timestamp}'",
1774                                 ), $fname
1775                         );
1776                 }
1777
1778                 # Save it!
1779                 $newcomment = wfMsg( 'revertpage', $s->old_user_text, $from );
1780                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1781                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1782                 $wgOut->addHTML( '<h2>' . $newcomment . "</h2>\n<hr />\n" );
1783                 $this->updateArticle( Article::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1784                 Article::onArticleEdit( $this->mTitle );
1785                 $wgOut->returnToMain( false );
1786         }
1787
1788
1789         /**
1790          * Do standard deferred updates after page view
1791          * @private
1792          */
1793         function viewUpdates() {
1794                 global $wgDeferredUpdateList;
1795                 if ( 0 != $this->getID() ) {
1796                         global $wgDisableCounters;
1797                         if( !$wgDisableCounters ) {
1798                                 Article::incViewCount( $this->getID() );
1799                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1800                                 array_push( $wgDeferredUpdateList, $u );
1801                         }
1802                 }
1803                 $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(),
1804                   $this->mTitle->getDBkey() );
1805                 array_push( $wgDeferredUpdateList, $u );
1806         }
1807
1808         /**
1809          * Do standard deferred updates after page edit.
1810          * Every 1000th edit, prune the recent changes table.
1811          * @private
1812          */
1813         function editUpdates( $text ) {
1814                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1815                 global $wgMessageCache;
1816
1817                 wfSeedRandom();
1818                 if ( 0 == mt_rand( 0, 999 ) ) {
1819                         $dbw =& wfGetDB( DB_MASTER );
1820                         $cutoff = wfUnix2Timestamp( time() - ( 7 * 86400 ) );
1821                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1822                         $dbw->query( $sql );
1823                 }
1824                 $id = $this->getID();
1825                 $title = $this->mTitle->getPrefixedDBkey();
1826                 $shortTitle = $this->mTitle->getDBkey();
1827
1828                 $adj = $this->mCountAdjustment;
1829
1830                 if ( 0 != $id ) {
1831                         $u = new LinksUpdate( $id, $title );
1832                         array_push( $wgDeferredUpdateList, $u );
1833                         $u = new SiteStatsUpdate( 0, 1, $adj );
1834                         array_push( $wgDeferredUpdateList, $u );
1835                         $u = new SearchUpdate( $id, $title, $text );
1836                         array_push( $wgDeferredUpdateList, $u );
1837
1838                         $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle );
1839                         array_push( $wgDeferredUpdateList, $u );
1840
1841                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1842                                 $wgMessageCache->replace( $shortTitle, $text );
1843                         }
1844                 }
1845         }
1846
1847         /**
1848          * @todo document this function
1849          * @private
1850          */
1851         function setOldSubtitle() {
1852                 global $wgLang, $wgOut, $wgUser;
1853
1854                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1855                 $sk = $wgUser->getSkin();
1856                 $lnk = $sk->makeKnownLinkObj ( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
1857                 $r = wfMsg( 'revisionasofwithlink', $td, $lnk );
1858                 $wgOut->setSubtitle( $r );
1859         }
1860
1861         /**
1862          * This function is called right before saving the wikitext,
1863          * so we can do things like signatures and links-in-context.
1864          */
1865         function preSaveTransform( $text ) {
1866                 global $wgParser, $wgUser;
1867                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
1868         }
1869
1870         /* Caching functions */
1871
1872         # checkLastModified returns true if it has taken care of all
1873         # output to the client that is necessary for this request.
1874         # (that is, it has sent a cached version of the page)
1875         function tryFileCache() {
1876                 static $called = false;
1877                 if( $called ) {
1878                         wfDebug( " tryFileCache() -- called twice!?\n" );
1879                         return;
1880                 }
1881                 $called = true;
1882                 if($this->isFileCacheable()) {
1883                         $touched = $this->mTouched;
1884                         if( $this->mTitle->getPrefixedDBkey() == wfMsg( 'mainpage' ) ) {
1885                                 # Expire the main page quicker
1886                                 $expire = wfUnix2Timestamp( time() - 3600 );
1887                                 $touched = max( $expire, $touched );
1888                         }
1889                         $cache = new CacheManager( $this->mTitle );
1890                         if($cache->isFileCacheGood( $touched )) {
1891                                 global $wgOut;
1892                                 wfDebug( " tryFileCache() - about to load\n" );
1893                                 $cache->loadFromFileCache();
1894                                 return true;
1895                         } else {
1896                                 wfDebug( " tryFileCache() - starting buffer\n" );
1897                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1898                         }
1899                 } else {
1900                         wfDebug( " tryFileCache() - not cacheable\n" );
1901                 }
1902         }
1903
1904         function isFileCacheable() {
1905                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
1906                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
1907
1908                 return $wgUseFileCache
1909                         and (!$wgShowIPinHeader)
1910                         and ($this->getID() != 0)
1911                         and ($wgUser->getId() == 0)
1912                         and (!$wgUser->getNewtalk())
1913                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
1914                         and (empty( $action ) || $action == 'view')
1915                         and (!isset($oldid))
1916                         and (!isset($diff))
1917                         and (!isset($redirect))
1918                         and (!isset($printable))
1919                         and (!$this->mRedirectedFrom);
1920         }
1921
1922         # Loads cur_touched and returns a value indicating if it should be used
1923         function checkTouched() {
1924                 $fname = 'Article::checkTouched';
1925                 $id = $this->getID();
1926                 $dbr =& $this->getDB();
1927                 $s = $dbr->getArray( 'cur', array( 'cur_touched', 'cur_is_redirect' ),
1928                         array( 'cur_id' => $id ), $fname, $this->getSelectOptions() );
1929                 if( $s !== false ) {
1930                         $this->mTouched = wfTimestamp(TS_MW,$s->cur_touched);
1931                         return !$s->cur_is_redirect;
1932                 } else {
1933                         return false;
1934                 }
1935         }
1936
1937         # Edit an article without doing all that other stuff
1938         function quickEdit( $text, $comment = '', $minor = 0 ) {
1939                 global $wgUser, $wgMwRedir;
1940                 $fname = 'Article::quickEdit';
1941                 wfProfileIn( $fname );
1942
1943                 $dbw =& wfGetDB( DB_MASTER );
1944                 $ns = $this->mTitle->getNamespace();
1945                 $dbkey = $this->mTitle->getDBkey();
1946                 $encDbKey = $dbw->strencode( $dbkey );
1947                 $timestamp = wfTimestampNow();
1948
1949                 # Save to history
1950                 $dbw->insertSelect( 'old', 'cur',
1951                         array(
1952                                 'old_namespace' => 'cur_namespace',
1953                                 'old_title' => 'cur_title',
1954                                 'old_text' => 'cur_text',
1955                                 'old_comment' => 'cur_comment',
1956                                 'old_user' => 'cur_user',
1957                                 'old_user_text' => 'cur_user_text',
1958                                 'old_timestamp' => 'cur_timestamp',
1959                                 'inverse_timestamp' => '99999999999999-cur_timestamp',
1960                         ), array(
1961                                 'cur_namespace' => $ns,
1962                                 'cur_title' => $dbkey,
1963                         ), $fname
1964                 );
1965
1966                 # Use the affected row count to determine if the article is new
1967                 $numRows = $dbw->affectedRows();
1968
1969                 # Make an array of fields to be inserted
1970                 $fields = array(
1971                         'cur_text' => $text,
1972                         'cur_timestamp' => $timestamp,
1973                         'cur_user' => $wgUser->getID(),
1974                         'cur_user_text' => $wgUser->getName(),
1975                         'inverse_timestamp' => wfInvertTimestamp( $timestamp ),
1976                         'cur_comment' => $comment,
1977                         'cur_is_redirect' => $wgMwRedir->matchStart( $text ) ? 1 : 0,
1978                         'cur_minor_edit' => intval($minor),
1979                         'cur_touched' => $dbw->timestamp($timestamp),
1980                 );
1981
1982                 if ( $numRows ) {
1983                         # Update article
1984                         $fields['cur_is_new'] = 0;
1985                         $dbw->updateArray( 'cur', $fields, array( 'cur_namespace' => $ns, 'cur_title' => $dbkey ), $fname );
1986                 } else {
1987                         # Insert new article
1988                         $fields['cur_is_new'] = 1;
1989                         $fields['cur_namespace'] = $ns;
1990                         $fields['cur_title'] = $dbkey;
1991                         $fields['cur_random'] = $rand = number_format( mt_rand() / mt_getrandmax(), 12, '.', '' );
1992                         $dbw->insertArray( 'cur', $fields, $fname );
1993                 }
1994                 wfProfileOut( $fname );
1995         }
1996
1997         /* static */ function incViewCount( $id ) {
1998                 $id = intval( $id );
1999                 global $wgHitcounterUpdateFreq;
2000
2001                 $dbw =& wfGetDB( DB_MASTER );
2002                 $curTable = $dbw->tableName( 'cur' );
2003                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
2004                 $acchitsTable = $dbw->tableName( 'acchits' );
2005
2006                 if( $wgHitcounterUpdateFreq <= 1 ){ //
2007                         $dbw->query( "UPDATE $curTable SET cur_counter = cur_counter + 1 WHERE cur_id = $id" );
2008                         return;
2009                 }
2010
2011                 # Not important enough to warrant an error page in case of failure
2012                 $oldignore = $dbw->ignoreErrors( true );
2013
2014                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2015
2016                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2017                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2018                         # Most of the time (or on SQL errors), skip row count check
2019                         $dbw->ignoreErrors( $oldignore );
2020                         return;
2021                 }
2022
2023                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2024                 $row = $dbw->fetchObject( $res );
2025                 $rown = intval( $row->n );
2026                 if( $rown >= $wgHitcounterUpdateFreq ){
2027                         wfProfileIn( 'Article::incViewCount-collect' );
2028                         $old_user_abort = ignore_user_abort( true );
2029
2030                         $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2031                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable TYPE=HEAP ".
2032                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2033                                 'GROUP BY hc_id');
2034                         $dbw->query("DELETE FROM $hitcounterTable");
2035                         $dbw->query('UNLOCK TABLES');
2036                         $dbw->query("UPDATE $curTable,$acchitsTable SET cur_counter=cur_counter + hc_n ".
2037                                 'WHERE cur_id = hc_id');
2038                         $dbw->query("DROP TABLE $acchitsTable");
2039
2040                         ignore_user_abort( $old_user_abort );
2041                         wfProfileOut( 'Article::incViewCount-collect' );
2042                 }
2043                 $dbw->ignoreErrors( $oldignore );
2044         }
2045
2046         /**
2047          * The onArticle*() functions are supposed to be a kind of hooks
2048          * which should be called whenever any of the specified actions
2049          * are done.
2050          *
2051          * This is a good place to put code to clear caches, for instance.
2052          *
2053          * This is called on page move and undelete, as well as edit
2054          * @static
2055          * @param $title_obj a title object
2056          */
2057         function onArticleCreate($title_obj) {
2058                 global $wgUseSquid, $wgDeferredUpdateList;
2059
2060                 $titles = $title_obj->getBrokenLinksTo();
2061
2062                 # Purge squid
2063                 if ( $wgUseSquid ) {
2064                         $urls = $title_obj->getSquidURLs();
2065                         foreach ( $titles as $linkTitle ) {
2066                                 $urls[] = $linkTitle->getInternalURL();
2067                         }
2068                         $u = new SquidUpdate( $urls );
2069                         array_push( $wgDeferredUpdateList, $u );
2070                 }
2071
2072                 # Clear persistent link cache
2073                 LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
2074         }
2075
2076         /**
2077          * @static
2078          */
2079         function onArticleDelete($title_obj) {
2080                 LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
2081         }
2082
2083         /**
2084          * @static
2085          */
2086         function onArticleEdit($title_obj) {
2087                 LinkCache::linksccClearPage( $title_obj->getArticleID() );
2088         }
2089
2090
2091         /**
2092          * Info about this page
2093          */
2094         function info() {
2095                 global $wgUser, $wgTitle, $wgOut, $wgLang, $wgAllowPageInfo;
2096                 $fname = 'Article::info';
2097
2098                 if ( !$wgAllowPageInfo ) {
2099                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
2100                         return;
2101                 }
2102
2103                 $dbr =& $this->getDB();
2104
2105                 $basenamespace = $wgTitle->getNamespace() & (~1);
2106                 $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace );
2107                 $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace );
2108                 $wl_clause  = array( 'wl_title' => $wgTitle->getDBkey(), 'wl_namespace' => $basenamespace );
2109                 $fullTitle = $wgTitle->makeName($basenamespace, $wgTitle->getDBKey());
2110                 $wgOut->setPagetitle(  $fullTitle );
2111                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
2112
2113                 # first, see if the page exists at all.
2114                 $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2115                 if ($exists < 1) {
2116                         $wgOut->addHTML( wfMsg('noarticletext') );
2117                 } else {
2118                         $numwatchers = $dbr->selectField( 'watchlist', 'COUNT(*)', $wl_clause, $fname,
2119                                 $this->getSelectOptions() );
2120                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $numwatchers) . '</li>' );
2121                         $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2122                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $old + 1) . '</li>');
2123
2124                         # to find number of distinct authors, we need to do some
2125                         # funny stuff because of the cur/old table split:
2126                         # - first, find the name of the 'cur' author
2127                         # - then, find the number of *other* authors in 'old'
2128
2129                         # find 'cur' author
2130                         $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2131                                 $this->getSelectOptions() );
2132
2133                         # find number of 'old' authors excluding 'cur' author
2134                         $authors = $dbr->selectField( 'old', 'COUNT(DISTINCT old_user_text)',
2135                                 $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ), $fname,
2136                                 $this->getSelectOptions() ) + 1;
2137
2138                         # now for the Talk page ...
2139                         $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace+1 );
2140                         $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace+1 );
2141
2142                         # does it exist?
2143                         $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2144
2145                         # number of edits
2146                         if ($exists > 0) {
2147                                 $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2148                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $old + 1) . '</li>');
2149                         }
2150                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $authors) . '</li>' );
2151
2152                         # number of authors
2153                         if ($exists > 0) {
2154                                 $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2155                                         $this->getSelectOptions() );
2156                                 $authors = $dbr->selectField( 'cur', 'COUNT(DISTINCT old_user_text)',
2157                                         $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ),
2158                                         $fname, $this->getSelectOptions() );
2159
2160                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $authors) . '</li></ul>' );
2161                         }
2162                 }
2163         }
2164 }
2165
2166 ?>