includes/Article.php

   1 <?php
   2 /**
   3  * File for articles
   4  * @version $Id$
   5  * @package MediaWiki
   6  */
   7
   8 /**
   9  * Need the CacheManager to be loaded
  10  */
  11 require_once ( 'CacheManager.php' );
  12
  13 $wgArticleCurContentFields = false;
  14 $wgArticleOldContentFields = false;
  15
  16 /**
  17  * Class representing a Wikipedia article and history.
  18  *
  19  * See design.doc for an overview.
  20  * Note: edit user interface and cache support functions have been
  21  * moved to separate EditPage and CacheManager classes.
  22  *
  23  * @version $Id$
  24  * @package MediaWiki
  25  */
  26 class Article {
  27         /**#@+
  28          * @access private
  29          */
  30         var $mContent, $mContentLoaded;
  31         var $mUser, $mTimestamp, $mUserText;
  32         var $mCounter, $mComment, $mCountAdjustment;
  33         var $mMinorEdit, $mRedirectedFrom;
  34         var $mTouched, $mFileCache, $mTitle;
  35         var $mId, $mTable;
  36         var $mForUpdate;
  37         /**#@-*/
  38
  39         /**
  40          * Constructor and clear the article
  41          * @param mixed &$title
  42          */
  43         function Article( &$title ) {
  44                 $this->mTitle =& $title;
  45                 $this->clear();
  46         }
  47
  48         /**
  49           * Clear the object
  50           * @private
  51           */
  52         function clear() {
  53                 $this->mContentLoaded = false;
  54                 $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
  55                 $this->mRedirectedFrom = $this->mUserText =
  56                 $this->mTimestamp = $this->mComment = $this->mFileCache = '';
  57                 $this->mCountAdjustment = 0;
  58                 $this->mTouched = '19700101000000';
  59                 $this->mForUpdate = false;
  60         }
  61
  62         /**
  63           * Get revision text associated with an old or archive row
  64           * $row is usually an object from wfFetchRow(), both the flags and the text
  65           * field must be included
  66           * @static
  67           * @param integer $row Id of a row
  68           * @param string $prefix table prefix (default 'old_')
  69           * @return string $text|false the text requested
  70         */
  71         function getRevisionText( $row, $prefix = 'old_' ) {
  72                 # Get data
  73                 $textField = $prefix . 'text';
  74                 $flagsField = $prefix . 'flags';
  75
  76                 if ( isset( $row->$flagsField ) ) {
  77                         $flags = explode( ',', $row->$flagsField );
  78                 } else {
  79                         $flags = array();
  80                 }
  81
  82                 if ( isset( $row->$textField ) ) {
  83                         $text = $row->$textField;
  84                 } else {
  85                         return false;
  86                 }
  87
  88                 if ( in_array( 'link', $flags ) ) {
  89                         # Handle link type
  90                         $text = Article::followLink( $text );
  91                 } elseif ( in_array( 'gzip', $flags ) ) {
  92                         # Deal with optional compression of archived pages.
  93                         # This can be done periodically via maintenance/compressOld.php, and
  94                         # as pages are saved if $wgCompressRevisions is set.
  95                         return gzinflate( $text );
  96                 }
  97                 return $text;
  98         }
  99
 100         /**
 101          * If $wgCompressRevisions is enabled, we will compress datas
 102          * @static
 103          * @param mixed $text reference to a text
 104          * @return string 'gzip' if it get compressed, '' overwise
 105          */
 106         function compressRevisionText( &$text ) {
 107                 global $wgCompressRevisions;
 108                 if( !$wgCompressRevisions ) {
 109                         return '';
 110                 }
 111                 if( !function_exists( 'gzdeflate' ) ) {
 112                         wfDebug( "Article::compressRevisionText() -- no zlib support, not compressing\n" );
 113                         return '';
 114                 }
 115                 $text = gzdeflate( $text );
 116                 return 'gzip';
 117         }
 118
 119         /**
 120          * Returns the text associated with a "link" type old table row
 121          * @static
 122          * @param mixed $link
 123          * @return string $text|false
 124          */
 125         function followLink( $link ) {
 126                 # Split the link into fields and values
 127                 $lines = explode( '\n', $link );
 128                 $hash = '';
 129                 $locations = array();
 130                 foreach ( $lines as $line ) {
 131                         # Comments
 132                         if ( $line{0} == '#' ) {
 133                                 continue;
 134                         }
 135                         # Field/value pairs
 136                         if ( preg_match( '/^(.*?)\s*:\s*(.*)$/', $line, $matches ) ) {
 137                                 $field = strtolower($matches[1]);
 138                                 $value = $matches[2];
 139                                 if ( $field == 'hash' ) {
 140                                         $hash = $value;
 141                                 } elseif ( $field == 'location' ) {
 142                                         $locations[] = $value;
 143                                 }
 144                         }
 145                 }
 146
 147                 if ( $hash === '' ) {
 148                         return false;
 149                 }
 150
 151                 # Look in each specified location for the text
 152                 $text = false;
 153                 foreach ( $locations as $location ) {
 154                         $text = Article::fetchFromLocation( $location, $hash );
 155                         if ( $text !== false ) {
 156                                 break;
 157                         }
 158                 }
 159
 160                 return $text;
 161         }
 162
 163         /**
 164          * @static
 165          * @param $location
 166          * @param $hash
 167          */
 168         function fetchFromLocation( $location, $hash ) {
 169                 global $wgLoadBalancer;
 170                 $fname = 'fetchFromLocation';
 171                 wfProfileIn( $fname );
 172
 173                 $p = strpos( $location, ':' );
 174                 if ( $p === false ) {
 175                         wfProfileOut( $fname );
 176                         return false;
 177                 }
 178
 179                 $type = substr( $location, 0, $p );
 180                 $text = false;
 181                 switch ( $type ) {
 182                         case 'mysql':
 183                                 # MySQL locations are specified by mysql://<machineID>/<dbname>/<tblname>/<index>
 184                                 # Machine ID 0 is the current connection
 185                                 if ( preg_match( '/^mysql:\/\/(\d+)\/([A-Za-z_]+)\/([A-Za-z_]+)\/([A-Za-z_]+)$/',
 186                                   $location, $matches ) ) {
 187                                         $machineID = $matches[1];
 188                                         $dbName = $matches[2];
 189                                         $tblName = $matches[3];
 190                                         $index = $matches[4];
 191                                         if ( $machineID == 0 ) {
 192                                                 # Current connection
 193                                                 $db =& $this->getDB();
 194                                         } else {
 195                                                 # Alternate connection
 196                                                 $db =& $wgLoadBalancer->getConnection( $machineID );
 197
 198                                                 if ( array_key_exists( $machineId, $wgKnownMysqlServers ) ) {
 199                                                         # Try to open, return false on failure
 200                                                         $params = $wgKnownDBServers[$machineId];
 201                                                         $db = Database::newFromParams( $params['server'], $params['user'], $params['password'],
 202                                                                 $dbName, 1, DBO_IGNORE );
 203                                                 }
 204                                         }
 205                                         if ( $db->isOpen() ) {
 206                                                 $index = $db->strencode( $index );
 207                                                 $res = $db->query( "SELECT blob_data FROM $dbName.$tblName " .
 208                                                         "WHERE blob_index='$index' " . $this->getSelectOptions(), $fname );
 209                                                 $row = $db->fetchObject( $res );
 210                                                 $text = $row->text_data;
 211                                         }
 212                                 }
 213                                 break;
 214                         case 'file':
 215                                 # File locations are of the form file://<filename>, relative to the current directory
 216                                 if ( preg_match( '/^file:\/\/(.*)$', $location, $matches ) )
 217                                 $filename = strstr( $location, 'file://' );
 218                                 $text = @file_get_contents( $matches[1] );
 219                 }
 220                 if ( $text !== false ) {
 221                         # Got text, now we need to interpret it
 222                         # The first line contains information about how to do this
 223                         $p = strpos( $text, '\n' );
 224                         $type = substr( $text, 0, $p );
 225                         $text = substr( $text, $p + 1 );
 226                         switch ( $type ) {
 227                                 case 'plain':
 228                                         break;
 229                                 case 'gzip':
 230                                         $text = gzinflate( $text );
 231                                         break;
 232                                 case 'object':
 233                                         $object = unserialize( $text );
 234                                         $text = $object->getItem( $hash );
 235                                         break;
 236                                 default:
 237                                         $text = false;
 238                         }
 239                 }
 240                 wfProfileOut( $fname );
 241                 return $text;
 242         }
 243
 244         /**
 245          * Note that getContent/loadContent may follow redirects if
 246          * not told otherwise, and so may cause a change to mTitle.
 247          *
 248          * @param $noredir
 249          * @return Return the text of this revision
 250         */
 251         function getContent( $noredir ) {
 252                 global $wgRequest;
 253
 254                 # Get variables from query string :P
 255                 $action = $wgRequest->getText( 'action', 'view' );
 256                 $section = $wgRequest->getText( 'section' );
 257
 258                 $fname =  'Article::getContent';
 259                 wfProfileIn( $fname );
 260
 261                 if ( 0 == $this->getID() ) {
 262                         if ( 'edit' == $action ) {
 263                                 wfProfileOut( $fname );
 264                                 return ''; # was "newarticletext", now moved above the box)
 265                         }
 266                         wfProfileOut( $fname );
 267                         return wfMsg( 'noarticletext' );
 268                 } else {
 269                         $this->loadContent( $noredir );
 270                         # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 271                         if ( $this->mTitle->getNamespace() == NS_USER_TALK &&
 272                           preg_match('/^\d{1,3}\.\d{1,3}.\d{1,3}\.\d{1,3}$/',$this->mTitle->getText()) &&
 273                           $action=='view'
 274                         ) {
 275                                 wfProfileOut( $fname );
 276                                 return $this->mContent . "\n" .wfMsg('anontalkpagetext');
 277                         } else {
 278                                 if($action=='edit') {
 279                                         if($section!='') {
 280                                                 if($section=='new') {
 281                                                         wfProfileOut( $fname );
 282                                                         return '';
 283                                                 }
 284
 285                                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 286                                                 # comments to be stripped as well)
 287                                                 $rv=$this->getSection($this->mContent,$section);
 288                                                 wfProfileOut( $fname );
 289                                                 return $rv;
 290                                         }
 291                                 }
 292                                 wfProfileOut( $fname );
 293                                 return $this->mContent;
 294                         }
 295                 }
 296         }
 297
 298         /**
 299          * This function returns the text of a section, specified by a number ($section).
 300          * A section is text under a heading like == Heading == or <h1>Heading</h1>, or
 301          * the first section before any such heading (section 0).
 302          *
 303          * If a section contains subsections, these are also returned.
 304          *
 305          * @param string $text text to look in
 306          * @param integer $section section number
 307          * @return string text of the requested section
 308          */
 309         function getSection($text,$section) {
 310
 311                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 312                 # comments to be stripped as well)
 313                 $striparray=array();
 314                 $parser=new Parser();
 315                 $parser->mOutputType=OT_WIKI;
 316                 $striptext=$parser->strip($text, $striparray, true);
 317
 318                 # now that we can be sure that no pseudo-sections are in the source,
 319                 # split it up by section
 320                 $secs =
 321                   preg_split(
 322                   '/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 323                   $striptext, -1,
 324                   PREG_SPLIT_DELIM_CAPTURE);
 325                 if($section==0) {
 326                         $rv=$secs[0];
 327                 } else {
 328                         $headline=$secs[$section*2-1];
 329                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 330                         $hlevel=$matches[1];
 331
 332                         # translate wiki heading into level
 333                         if(strpos($hlevel,'=')!==false) {
 334                                 $hlevel=strlen($hlevel);
 335                         }
 336
 337                         $rv=$headline. $secs[$section*2];
 338                         $count=$section+1;
 339
 340                         $break=false;
 341                         while(!empty($secs[$count*2-1]) && !$break) {
 342
 343                                 $subheadline=$secs[$count*2-1];
 344                                 preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 345                                 $subhlevel=$matches[1];
 346                                 if(strpos($subhlevel,'=')!==false) {
 347                                         $subhlevel=strlen($subhlevel);
 348                                 }
 349                                 if($subhlevel > $hlevel) {
 350                                         $rv.=$subheadline.$secs[$count*2];
 351                                 }
 352                                 if($subhlevel <= $hlevel) {
 353                                         $break=true;
 354                                 }
 355                                 $count++;
 356
 357                         }
 358                 }
 359                 # reinsert stripped tags
 360                 $rv=$parser->unstrip($rv,$striparray);
 361                 $rv=$parser->unstripNoWiki($rv,$striparray);
 362                 $rv=trim($rv);
 363                 return $rv;
 364
 365         }
 366
 367         /**
 368          * Return an array of the columns of the "cur"-table
 369          */
 370         function &getCurContentFields() {
 371                 global $wgArticleCurContentFields;
 372                 if ( !$wgArticleCurContentFields ) {
 373                         $wgArticleCurContentFields = array( 'cur_text','cur_timestamp','cur_user', 'cur_user_text',
 374                           'cur_comment','cur_counter','cur_restrictions','cur_touched' );
 375                 }
 376                 return $wgArticleCurContentFields;
 377         }
 378
 379         /**
 380          * Return an array of the columns of the "old"-table
 381          */
 382         function &getOldContentFields() {
 383                 global $wgArticleOldContentFields;
 384                 if ( !$wgArticleOldContentFields ) {
 385                         $wgArticleOldContentFields = array( 'old_namespace','old_title','old_text','old_timestamp',
 386                           'old_user','old_user_text','old_comment','old_flags' );
 387                 }
 388                 return $wgArticleOldContentFields;
 389         }
 390
 391         /**
 392          * Load the revision (including cur_text) into this object
 393         */
 394         function loadContent( $noredir = false ) {
 395                 global $wgOut, $wgMwRedir, $wgRequest;
 396
 397                 $dbr =& $this->getDB();
 398                 # Query variables :P
 399                 $oldid = $wgRequest->getVal( 'oldid' );
 400                 $redirect = $wgRequest->getVal( 'redirect' );
 401
 402                 if ( $this->mContentLoaded ) return;
 403                 $fname = 'Article::loadContent';
 404
 405                 # Pre-fill content with error message so that if something
 406                 # fails we'll have something telling us what we intended.
 407
 408                 $t = $this->mTitle->getPrefixedText();
 409                 if ( isset( $oldid ) ) {
 410                         $oldid = IntVal( $oldid );
 411                         $t .= ',oldid='.$oldid;
 412                 }
 413                 if ( isset( $redirect ) ) {
 414                         $redirect = ($redirect == 'no') ? 'no' : 'yes';
 415                         $t .= ',redirect='.$redirect;
 416                 }
 417                 $this->mContent = wfMsg( 'missingarticle', $t );
 418
 419                 if ( ! $oldid ) {       # Retrieve current version
 420                         $id = $this->getID();
 421                         if ( 0 == $id ) return;
 422
 423                         $s = $dbr->selectRow( 'cur', $this->getCurContentFields(), array( 'cur_id' => $id ), $fname,
 424                                 $this->getSelectOptions() );
 425                         if ( $s === false ) {
 426                                 return;
 427                         }
 428
 429                         # If we got a redirect, follow it (unless we've been told
 430                         # not to by either the function parameter or the query
 431                         if ( ( 'no' != $redirect ) && ( false == $noredir ) ) {
 432                                 $rt = Title::newFromRedirect( $s->cur_text );
 433                                 # process if title object is valid and not special:userlogout
 434                                 if ( $rt && ! ( $rt->getNamespace() == NS_SPECIAL && $rt->getText() == 'Userlogout' ) ) {
 435                                         # Gotta hand redirects to special pages differently:
 436                                         # Fill the HTTP response "Location" header and ignore
 437                                         # the rest of the page we're on.
 438
 439                                         if ( $rt->getInterwiki() != '' ) {
 440                                                 $wgOut->redirect( $rt->getFullURL() ) ;
 441                                                 return;
 442                                         }
 443                                         if ( $rt->getNamespace() == NS_SPECIAL ) {
 444                                                 $wgOut->redirect( $rt->getFullURL() );
 445                                                 return;
 446                                         }
 447                                         $rid = $rt->getArticleID();
 448                                         if ( 0 != $rid ) {
 449                                                 $redirRow = $dbr->selectRow( 'cur', $this->getCurContentFields(),
 450                                                         array( 'cur_id' => $rid ), $fname, $this->getSelectOptions() );
 451
 452                                                 if ( $redirRow !== false ) {
 453                                                         $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 454                                                         $this->mTitle = $rt;
 455                                                         $s = $redirRow;
 456                                                 }
 457                                         }
 458                                 }
 459                         }
 460
 461                         $this->mContent = $s->cur_text;
 462                         $this->mUser = $s->cur_user;
 463                         $this->mUserText = $s->cur_user_text;
 464                         $this->mComment = $s->cur_comment;
 465                         $this->mCounter = $s->cur_counter;
 466                         $this->mTimestamp = wfTimestamp(TS_MW,$s->cur_timestamp);
 467                         $this->mTouched = wfTimestamp(TS_MW,$s->cur_touched);
 468                         $this->mTitle->mRestrictions = explode( ',', trim( $s->cur_restrictions ) );
 469                         $this->mTitle->mRestrictionsLoaded = true;
 470                 } else { # oldid set, retrieve historical version
 471                         $s = $dbr->getArray( 'old', $this->getOldContentFields(), array( 'old_id' => $oldid ),
 472                                 $fname, $this->getSelectOptions() );
 473                         if ( $s === false ) {
 474                                 return;
 475                         }
 476
 477                         if( $this->mTitle->getNamespace() != $s->old_namespace ||
 478                                 $this->mTitle->getDBkey() != $s->old_title ) {
 479                                 $oldTitle = Title::makeTitle( $s->old_namesapce, $s->old_title );
 480                                 $this->mTitle = $oldTitle;
 481                                 $wgTitle = $oldTitle;
 482                         }
 483                         $this->mContent = Article::getRevisionText( $s );
 484                         $this->mUser = $s->old_user;
 485                         $this->mUserText = $s->old_user_text;
 486                         $this->mComment = $s->old_comment;
 487                         $this->mCounter = 0;
 488                         $this->mTimestamp = wfTimestamp(TS_MW,$s->old_timestamp);
 489                 }
 490                 $this->mContentLoaded = true;
 491                 return $this->mContent;
 492         }
 493
 494         /**
 495          * Gets the article text without using so many damn globals
 496          * Returns false on error
 497          *
 498          * @param integer $oldid
 499          * @uses $wgMwRedir
 500          */
 501         function getContentWithoutUsingSoManyDamnGlobals( $oldid = 0, $noredir = false ) {
 502                 global $wgMwRedir;
 503
 504                 if ( $this->mContentLoaded ) {
 505                         return $this->mContent;
 506                 }
 507                 $this->mContent = false;
 508
 509                 $fname = 'Article::getContentWithout';
 510                 $dbr =& $this->getDB();
 511
 512                 if ( ! $oldid ) {       # Retrieve current version
 513                         $id = $this->getID();
 514                         if ( 0 == $id ) {
 515                                 return false;
 516                         }
 517
 518                         $s = $dbr->selectRow( 'cur', $this->getCurContentFields(), array( 'cur_id' => $id ),
 519                                 $fname, $this->getSelectOptions() );
 520                         if ( $s === false ) {
 521                                 return false;
 522                         }
 523
 524                         # If we got a redirect, follow it (unless we've been told
 525                         # not to by either the function parameter or the query
 526                         if ( !$noredir ) {
 527                                 $rt = Title::newFromRedirect( $s->cur_text );
 528                                 if( $rt &&  $rt->getInterwiki() == '' && $rt->getNamespace() != NS_SPECIAL ) {
 529                                         $rid = $rt->getArticleID();
 530                                         if ( 0 != $rid ) {
 531                                                 $redirRow = $dbr->selectRow( 'cur', $this->getCurContentFields(),
 532                                                         array( 'cur_id' => $rid ), $fname, $this->getSelectOptions() );
 533
 534                                                 if ( $redirRow !== false ) {
 535                                                         $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 536                                                         $this->mTitle = $rt;
 537                                                         $s = $redirRow;
 538                                                 }
 539                                         }
 540                                 }
 541                         }
 542
 543                         $this->mContent = $s->cur_text;
 544                         $this->mUser = $s->cur_user;
 545                         $this->mUserText = $s->cur_user_text;
 546                         $this->mComment = $s->cur_comment;
 547                         $this->mCounter = $s->cur_counter;
 548                         $this->mTimestamp = wfTimestamp(TS_MW,$s->cur_timestamp);
 549                         $this->mTouched = wfTimestamp(TS_MW,$s->cur_touched);
 550                         $this->mTitle->mRestrictions = explode( ',', trim( $s->cur_restrictions ) );
 551                         $this->mTitle->mRestrictionsLoaded = true;
 552                 } else { # oldid set, retrieve historical version
 553                         $s = $dbr->selectRow( 'old', $this->getOldContentFields(), array( 'old_id' => $oldid ),
 554                                 $fname, $this->getSelectOptions() );
 555                         if ( $s === false ) {
 556                                 return false;
 557                         }
 558                         $this->mContent = Article::getRevisionText( $s );
 559                         $this->mUser = $s->old_user;
 560                         $this->mUserText = $s->old_user_text;
 561                         $this->mComment = $s->old_comment;
 562                         $this->mCounter = 0;
 563                         $this->mTimestamp = wfTimestamp(TS_MW,$s->old_timestamp);
 564                 }
 565                 $this->mContentLoaded = true;
 566                 return $this->mContent;
 567         }
 568
 569         /**
 570          * Read/write accessor to select FOR UPDATE
 571          */
 572         function forUpdate( $x = NULL ) {
 573                 return wfSetVar( $this->mForUpdate, $x );
 574         }
 575
 576         /**
 577          * Get the database which should be used for reads
 578          */
 579         function &getDB() {
 580                 if ( $this->mForUpdate ) {
 581                         return wfGetDB( DB_MASTER );
 582                 } else {
 583                         return wfGetDB( DB_SLAVE );
 584                 }
 585         }
 586
 587         /**
 588          * Get options for all SELECT statements
 589          * Can pass an option array, to which the class-wide options will be appended
 590          */
 591         function getSelectOptions( $options = '' ) {
 592                 if ( $this->mForUpdate ) {
 593                         if ( $options ) {
 594                                 $options[] = 'FOR UPDATE';
 595                         } else {
 596                                 $options = 'FOR UPDATE';
 597                         }
 598                 }
 599                 return $options;
 600         }
 601
 602         /**
 603          * Return the Article ID
 604          */
 605         function getID() {
 606                 if( $this->mTitle ) {
 607                         return $this->mTitle->getArticleID();
 608                 } else {
 609                         return 0;
 610                 }
 611         }
 612
 613         /*
 614          * @todo document function
 615          */
 616         function getCount() {
 617                 if ( -1 == $this->mCounter ) {
 618                         $id = $this->getID();
 619                         $dbr =& $this->getDB();
 620                         $this->mCounter = $dbr->selectField( 'cur', 'cur_counter', 'cur_id='.$id,
 621                                 'Article::getCount', $this->getSelectOptions() );
 622                 }
 623                 return $this->mCounter;
 624         }
 625
 626         /**
 627          * Would the given text make this article a "good" article (i.e.,
 628          * suitable for including in the article count)?
 629          */
 630         function isCountable( $text ) {
 631                 global $wgUseCommaCount, $wgMwRedir;
 632
 633                 if ( 0 != $this->mTitle->getNamespace() ) { return 0; }
 634                 if ( $wgMwRedir->matchStart( $text ) ) { return 0; }
 635                 $token = ($wgUseCommaCount ? ',' : '[[' );
 636                 if ( false === strstr( $text, $token ) ) { return 0; }
 637                 return 1;
 638         }
 639
 640         /**
 641          * Loads everything from cur except cur_text
 642          * This isn't necessary for all uses, so it's only done if needed.
 643          * @private
 644          */
 645         function loadLastEdit() {
 646                 global $wgOut;
 647                 if ( -1 != $this->mUser ) return;
 648
 649                 $fname = 'Article::loadLastEdit';
 650
 651                 $dbr =& $this->getDB();
 652                 $s = $dbr->getArray( 'cur',
 653                   array( 'cur_user','cur_user_text','cur_timestamp', 'cur_comment','cur_minor_edit' ),
 654                   array( 'cur_id' => $this->getID() ), $fname, $this->getSelectOptions() );
 655
 656                 if ( $s !== false ) {
 657                         $this->mUser = $s->cur_user;
 658                         $this->mUserText = $s->cur_user_text;
 659                         $this->mTimestamp = wfTimestamp(TS_MW,$s->cur_timestamp);
 660                         $this->mComment = $s->cur_comment;
 661                         $this->mMinorEdit = $s->cur_minor_edit;
 662                 }
 663         }
 664
 665         function getTimestamp() {
 666                 $this->loadLastEdit();
 667                 return $this->mTimestamp;
 668         }
 669
 670         function getUser() {
 671                 $this->loadLastEdit();
 672                 return $this->mUser;
 673         }
 674
 675         function getUserText() {
 676                 $this->loadLastEdit();
 677                 return $this->mUserText;
 678         }
 679
 680         function getComment() {
 681                 $this->loadLastEdit();
 682                 return $this->mComment;
 683         }
 684
 685         function getMinorEdit() {
 686                 $this->loadLastEdit();
 687                 return $this->mMinorEdit;
 688         }
 689
 690         function getContributors($limit = 0, $offset = 0) {
 691                 $fname = 'Article::getContributors';
 692
 693                 # XXX: this is expensive; cache this info somewhere.
 694
 695                 $title = $this->mTitle;
 696                 $contribs = array();
 697                 $dbr =& $this->getDB();
 698                 $oldTable = $dbr->tableName( 'old' );
 699                 $userTable = $dbr->tableName( 'user' );
 700                 $encDBkey = $dbr->addQuotes( $title->getDBkey() );
 701                 $ns = $title->getNamespace();
 702                 $user = $this->getUser();
 703
 704                 $sql = "SELECT old_user, old_user_text, user_real_name, MAX(old_timestamp) as timestamp
 705                         FROM $oldTable LEFT JOIN $userTable ON old_user = user_id
 706                         WHERE old_namespace = $user
 707                         AND old_title = $encDBkey
 708                         AND old_user != $user
 709                         GROUP BY old_user
 710                         ORDER BY timestamp DESC";
 711
 712                 if ($limit > 0) { $sql .= ' LIMIT '.$limit; }
 713                 $sql .= ' '. $this->getSelectOptions();
 714
 715                 $res = $dbr->query($sql, $fname);
 716
 717                 while ( $line = $dbr->fetchObject( $res ) ) {
 718                         $contribs[] = array($line->old_user, $line->old_user_text, $line->user_real_name);
 719                 }
 720
 721                 $dbr->freeResult($res);
 722                 return $contribs;
 723         }
 724
 725         /**
 726          * This is the default action of the script: just view the page of
 727          * the given title.
 728         */
 729         function view() {
 730                 global $wgUser, $wgOut, $wgLang, $wgRequest, $wgMwRedir, $wgOnlySysopsCanPatrol;
 731                 global $wgLinkCache, $IP, $wgEnableParserCache, $wgStylePath, $wgUseRCPatrol;
 732                 $sk = $wgUser->getSkin();
 733
 734                 $fname = 'Article::view';
 735                 wfProfileIn( $fname );
 736                 # Get variables from query string
 737                 $oldid = $wgRequest->getVal( 'oldid' );
 738                 $diff = $wgRequest->getVal( 'diff' );
 739                 $rcid = $wgRequest->getVal( 'rcid' );
 740
 741                 $wgOut->setArticleFlag( true );
 742                 $wgOut->setRobotpolicy( 'index,follow' );
 743                 # If we got diff and oldid in the query, we want to see a
 744                 # diff page instead of the article.
 745
 746                 if ( !is_null( $diff ) ) {
 747                         require_once( 'DifferenceEngine.php' );
 748                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 749                         $de = new DifferenceEngine( $oldid, $diff, $rcid );
 750                         $de->showDiffPage();
 751                         wfProfileOut( $fname );
 752                         if( $diff == 0 ) {
 753                                 # Run view updates for current revision only
 754                                 $this->viewUpdates();
 755                         }
 756                         return;
 757                 }
 758                 if ( empty( $oldid ) && $this->checkTouched() ) {
 759                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 760                                 return;
 761                         } else if ( $this->tryFileCache() ) {
 762                                 # tell wgOut that output is taken care of
 763                                 $wgOut->disable();
 764                                 $this->viewUpdates();
 765                                 return;
 766                         }
 767                 }
 768                 # Should the parser cache be used?
 769                 if ( $wgEnableParserCache && intval($wgUser->getOption( 'stubthreshold' )) == 0 && empty( $oldid ) ) {
 770                         $pcache = true;
 771                 } else {
 772                         $pcache = false;
 773                 }
 774
 775                 $outputDone = false;
 776                 if ( $pcache ) {
 777                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 778                                 $outputDone = true;
 779                         }
 780                 }
 781                 if ( !$outputDone ) {
 782                         $text = $this->getContent( false ); # May change mTitle by following a redirect
 783
 784                         # Another whitelist check in case oldid or redirects are altering the title
 785                         if ( !$this->mTitle->userCanRead() ) {
 786                                 $wgOut->loginToUse();
 787                                 $wgOut->output();
 788                                 exit;
 789                         }
 790
 791
 792                         # We're looking at an old revision
 793
 794                         if ( !empty( $oldid ) ) {
 795                                 $this->setOldSubtitle();
 796                                 $wgOut->setRobotpolicy( 'noindex,follow' );
 797                         }
 798                         if ( '' != $this->mRedirectedFrom ) {
 799                                 $sk = $wgUser->getSkin();
 800                                 $redir = $sk->makeKnownLink( $this->mRedirectedFrom, '',
 801                                   'redirect=no' );
 802                                 $s = wfMsg( 'redirectedfrom', $redir );
 803                                 $wgOut->setSubtitle( $s );
 804
 805                                 # Can't cache redirects
 806                                 $pcache = false;
 807                         }
 808
 809                         # wrap user css and user js in pre and don't parse
 810                         # XXX: use $this->mTitle->usCssJsSubpage() when php is fixed/ a workaround is found
 811                         if (
 812                                 $this->mTitle->getNamespace() == NS_USER &&
 813                                 preg_match('/\\/[\\w]+\\.(css|js)$/', $this->mTitle->getDBkey())
 814                         ) {
 815                                 $wgOut->addWikiText( wfMsg('clearyourcache'));
 816                                 $wgOut->addHTML( '<pre>'.htmlspecialchars($this->mContent)."\n</pre>" );
 817                         } else if ( $rt = Title::newFromRedirect( $text ) ) {
 818                                 # Display redirect
 819                                 $imageUrl = $wgStylePath.'/common/images/redirect.png';
 820                                 $targetUrl = $rt->escapeLocalURL();
 821                                 $titleText = htmlspecialchars( $rt->getPrefixedText() );
 822                                 $link = $sk->makeLinkObj( $rt );
 823                                 $wgOut->addHTML( '<img valign="center" src="'.$imageUrl.'">' .
 824                                   '<span class="redirectText">'.$link.'</span>' );
 825                         } else if ( $pcache ) {
 826                                 # Display content and save to parser cache
 827                                 $wgOut->addPrimaryWikiText( $text, $this );
 828                         } else {
 829                                 # Display content, don't attempt to save to parser cache
 830                                 $wgOut->addWikiText( $text );
 831                         }
 832                 }
 833                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 834                 # If we have been passed an &rcid= parameter, we want to give the user a
 835                 # chance to mark this new article as patrolled.
 836                 if ( $wgUseRCPatrol && !is_null ( $rcid ) && $rcid != 0 && $wgUser->getID() != 0 &&
 837                      ( $wgUser->isSysop() || !$wgOnlySysopsCanPatrol ) )
 838                 {
 839                         $wgOut->addHTML( wfMsg ( 'markaspatrolledlink',
 840                                 $sk->makeKnownLinkObj ( $this->mTitle, wfMsg ( 'markaspatrolledtext' ),
 841                                         'action=markpatrolled&rcid='.$rcid )
 842                          ) );
 843                 }
 844
 845                 # Put link titles into the link cache
 846                 $wgOut->transformBuffer();
 847
 848                 # Add link titles as META keywords
 849                 $wgOut->addMetaTags() ;
 850
 851                 $this->viewUpdates();
 852                 wfProfileOut( $fname );
 853         }
 854
 855         /**
 856          * Theoretically we could defer these whole insert and update
 857          * functions for after display, but that's taking a big leap
 858          * of faith, and we want to be able to report database
 859          * errors at some point.
 860          * @private
 861          */
 862         function insertNewArticle( $text, $summary, $isminor, $watchthis ) {
 863                 global $wgOut, $wgUser, $wgMwRedir;
 864                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 865
 866                 $fname = 'Article::insertNewArticle';
 867
 868                 $this->mCountAdjustment = $this->isCountable( $text );
 869
 870                 $ns = $this->mTitle->getNamespace();
 871                 $ttl = $this->mTitle->getDBkey();
 872                 $text = $this->preSaveTransform( $text );
 873                 if ( $wgMwRedir->matchStart( $text ) ) { $redir = 1; }
 874                 else { $redir = 0; }
 875
 876                 $now = wfTimestampNow();
 877                 $won = wfInvertTimestamp( $now );
 878                 wfSeedRandom();
 879                 $rand = number_format( mt_rand() / mt_getrandmax(), 12, '.', '' );
 880                 $dbw =& wfGetDB( DB_MASTER );
 881
 882                 $cur_id = $dbw->nextSequenceValue( 'cur_cur_id_seq' );
 883
 884                 $isminor = ( $isminor && $wgUser->getID() ) ? 1 : 0;
 885
 886                 $dbw->insertArray( 'cur', array(
 887                         'cur_id' => $cur_id,
 888                         'cur_namespace' => $ns,
 889                         'cur_title' => $ttl,
 890                         'cur_text' => $text,
 891                         'cur_comment' => $summary,
 892                         'cur_user' => $wgUser->getID(),
 893                         'cur_timestamp' => $dbw->timestamp($now),
 894                         'cur_minor_edit' => $isminor,
 895                         'cur_counter' => 0,
 896                         'cur_restrictions' => '',
 897                         'cur_user_text' => $wgUser->getName(),
 898                         'cur_is_redirect' => $redir,
 899                         'cur_is_new' => 1,
 900                         'cur_random' => $rand,
 901                         'cur_touched' => $dbw->timestamp($now),
 902                         'inverse_timestamp' => $won,
 903                 ), $fname );
 904
 905                 $newid = $dbw->insertId();
 906                 $this->mTitle->resetArticleID( $newid );
 907
 908                 Article::onArticleCreate( $this->mTitle );
 909                 RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary );
 910
 911                 if ($watchthis) {
 912                         if(!$this->mTitle->userIsWatching()) $this->watch();
 913                 } else {
 914                         if ( $this->mTitle->userIsWatching() ) {
 915                                 $this->unwatch();
 916                         }
 917                 }
 918
 919                 # The talk page isn't in the regular link tables, so we need to update manually:
 920                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 921                 $dbw->updateArray( 'cur', array('cur_touched' => $dbw->timestamp($now) ),
 922                         array(  'cur_namespace' => $talkns, 'cur_title' => $ttl ), $fname );
 923
 924                 # standard deferred updates
 925                 $this->editUpdates( $text );
 926
 927                 $this->showArticle( $text, wfMsg( 'newarticle' ) );
 928         }
 929
 930
 931         /**
 932          * Side effects: loads last edit
 933          */
 934         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = '') {
 935                 $this->loadLastEdit();
 936                 $oldtext = $this->getContent( true );
 937                 if ($section != '') {
 938                         if($section=='new') {
 939                                 if($summary) $subject="== {$summary} ==\n\n";
 940                                 $text=$oldtext."\n\n".$subject.$text;
 941                         } else {
 942
 943                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 944                                 # comments to be stripped as well)
 945                                 $striparray=array();
 946                                 $parser=new Parser();
 947                                 $parser->mOutputType=OT_WIKI;
 948                                 $oldtext=$parser->strip($oldtext, $striparray, true);
 949
 950                                 # now that we can be sure that no pseudo-sections are in the source,
 951                                 # split it up
 952                                 # Unfortunately we can't simply do a preg_replace because that might
 953                                 # replace the wrong section, so we have to use the section counter instead
 954                                 $secs=preg_split('/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 955                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 956                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 957
 958                                 # section 0 is top (intro) section
 959                                 if($section!=0) {
 960
 961                                         # headline of old section - we need to go through this section
 962                                         # to determine if there are any subsections that now need to
 963                                         # be erased, as the mother section has been replaced with
 964                                         # the text of all subsections.
 965                                         $headline=$secs[$section*2-1];
 966                                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 967                                         $hlevel=$matches[1];
 968
 969                                         # determine headline level for wikimarkup headings
 970                                         if(strpos($hlevel,'=')!==false) {
 971                                                 $hlevel=strlen($hlevel);
 972                                         }
 973
 974                                         $secs[$section*2-1]=''; // erase old headline
 975                                         $count=$section+1;
 976                                         $break=false;
 977                                         while(!empty($secs[$count*2-1]) && !$break) {
 978
 979                                                 $subheadline=$secs[$count*2-1];
 980                                                 preg_match(
 981                                                  '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 982                                                 $subhlevel=$matches[1];
 983                                                 if(strpos($subhlevel,'=')!==false) {
 984                                                         $subhlevel=strlen($subhlevel);
 985                                                 }
 986                                                 if($subhlevel > $hlevel) {
 987                                                         // erase old subsections
 988                                                         $secs[$count*2-1]='';
 989                                                         $secs[$count*2]='';
 990                                                 }
 991                                                 if($subhlevel <= $hlevel) {
 992                                                         $break=true;
 993                                                 }
 994                                                 $count++;
 995
 996                                         }
 997
 998                                 }
 999                                 $text=join('',$secs);
1000                                 # reinsert the stuff that we stripped out earlier
1001                                 $text=$parser->unstrip($text,$striparray);
1002                                 $text=$parser->unstripNoWiki($text,$striparray);
1003                         }
1004
1005                 }
1006                 return $text;
1007         }
1008
1009         /**
1010          * @todo document this function
1011          */
1012         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
1013                 global $wgOut, $wgUser;
1014                 global $wgDBtransactions, $wgMwRedir;
1015                 global $wgUseSquid, $wgInternalServer;
1016
1017                 $fname = 'Article::updateArticle';
1018                 $good = true;
1019
1020                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
1021                 if ( $minor && $wgUser->getID() ) { $me2 = 1; } else { $me2 = 0; }
1022                 if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ')[^\\n]+)/i', $text, $m ) ) {
1023                         $redir = 1;
1024                         $text = $m[1] . "\n"; # Remove all content but redirect
1025                 }
1026                 else { $redir = 0; }
1027
1028                 $text = $this->preSaveTransform( $text );
1029                 $dbw =& wfGetDB( DB_MASTER );
1030
1031                 # Update article, but only if changed.
1032
1033                 # It's important that we either rollback or complete, otherwise an attacker could
1034                 # overwrite cur entries by sending precisely timed user aborts. Random bored users
1035                 # could conceivably have the same effect, especially if cur is locked for long periods.
1036                 if( $wgDBtransactions ) {
1037                         $dbw->query( 'BEGIN', $fname );
1038                 } else {
1039                         $userAbort = ignore_user_abort( true );
1040                 }
1041
1042                 $oldtext = $this->getContent( true );
1043
1044                 if ( 0 != strcmp( $text, $oldtext ) ) {
1045                         $this->mCountAdjustment = $this->isCountable( $text )
1046                           - $this->isCountable( $oldtext );
1047                         $now = wfTimestampNow();
1048                         $won = wfInvertTimestamp( $now );
1049
1050                         # First update the cur row
1051                         $dbw->updateArray( 'cur',
1052                                 array( /* SET */
1053                                         'cur_text' => $text,
1054                                         'cur_comment' => $summary,
1055                                         'cur_minor_edit' => $me2,
1056                                         'cur_user' => $wgUser->getID(),
1057                                         'cur_timestamp' => $dbw->timestamp($now),
1058                                         'cur_user_text' => $wgUser->getName(),
1059                                         'cur_is_redirect' => $redir,
1060                                         'cur_is_new' => 0,
1061                                         'cur_touched' => $dbw->timestamp($now),
1062                                         'inverse_timestamp' => $won
1063                                 ), array( /* WHERE */
1064                                         'cur_id' => $this->getID(),
1065                                         'cur_timestamp' => $dbw->timestamp($this->getTimestamp())
1066                                 ), $fname
1067                         );
1068
1069                         if( $dbw->affectedRows() == 0 ) {
1070                                 /* Belated edit conflict! Run away!! */
1071                                 $good = false;
1072                         } else {
1073                                 # Now insert the previous revision into old
1074
1075                                 # This overwrites $oldtext if revision compression is on
1076                                 $flags = Article::compressRevisionText( $oldtext );
1077
1078                                 $dbw->insertArray( 'old',
1079                                         array(
1080                                                 'old_id' => $dbw->nextSequenceValue( 'old_old_id_seq' ),
1081                                                 'old_namespace' => $this->mTitle->getNamespace(),
1082                                                 'old_title' => $this->mTitle->getDBkey(),
1083                                                 'old_text' => $oldtext,
1084                                                 'old_comment' => $this->getComment(),
1085                                                 'old_user' => $this->getUser(),
1086                                                 'old_user_text' => $this->getUserText(),
1087                                                 'old_timestamp' => $dbw->timestamp($this->getTimestamp()),
1088                                                 'old_minor_edit' => $me1,
1089                                                 'inverse_timestamp' => wfInvertTimestamp( $this->getTimestamp() ),
1090                                                 'old_flags' => $flags,
1091                                         ), $fname
1092                                 );
1093
1094                                 $oldid = $dbw->insertId();
1095
1096                                 $bot = (int)($wgUser->isBot() || $forceBot);
1097                                 RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
1098                                         $oldid, $this->getTimestamp(), $bot );
1099                                 Article::onArticleEdit( $this->mTitle );
1100                         }
1101                 }
1102
1103                 if( $wgDBtransactions ) {
1104                         $dbw->query( 'COMMIT', $fname );
1105                 } else {
1106                         ignore_user_abort( $userAbort );
1107                 }
1108
1109                 if ( $good ) {
1110                 if ($watchthis) {
1111                         if (!$this->mTitle->userIsWatching()) $this->watch();
1112                 } else {
1113                         if ( $this->mTitle->userIsWatching() ) {
1114                                 $this->unwatch();
1115                         }
1116                 }
1117                 # standard deferred updates
1118                 $this->editUpdates( $text );
1119
1120
1121                 $urls = array();
1122                 # Template namespace
1123                 # Purge all articles linking here
1124                 if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
1125                         $titles = $this->mTitle->getLinksTo();
1126                         Title::touchArray( $titles );
1127                         if ( $wgUseSquid ) {
1128                                         foreach ( $titles as $title ) {
1129                                                 $urls[] = $title->getInternalURL();
1130                                         }
1131                         }
1132                 }
1133
1134                 # Squid updates
1135                 if ( $wgUseSquid ) {
1136                         $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
1137                         $u = new SquidUpdate( $urls );
1138                         $u->doUpdate();
1139                 }
1140
1141                 $this->showArticle( $text, wfMsg( 'updated' ), $sectionanchor );
1142                 }
1143                 return $good;
1144         }
1145
1146         /**
1147          * After we've either updated or inserted the article, update
1148          * the link tables and redirect to the new page.
1149          */
1150         function showArticle( $text, $subtitle , $sectionanchor = '' ) {
1151                 global $wgOut, $wgUser, $wgLinkCache;
1152                 global $wgMwRedir;
1153
1154                 $wgLinkCache = new LinkCache();
1155                 # Select for update
1156                 $wgLinkCache->forUpdate( true );
1157
1158                 # Get old version of link table to allow incremental link updates
1159                 $wgLinkCache->preFill( $this->mTitle );
1160                 $wgLinkCache->clear();
1161
1162                 # Parse the text and replace links with placeholders
1163                 $wgOut = new OutputPage();
1164                 $wgOut->addWikiText( $text );
1165
1166                 # Look up the links in the DB and add them to the link cache
1167                 $wgOut->transformBuffer( RLH_FOR_UPDATE );
1168
1169                 if( $wgMwRedir->matchStart( $text ) )
1170                         $r = 'redirect=no';
1171                 else
1172                         $r = '';
1173                 $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
1174         }
1175
1176         /**
1177          * Validate article
1178          * @todo document this function a bit more
1179          */
1180         function validate () {
1181                 global $wgOut, $wgUseValidation;
1182                 if( $wgUseValidation ) {
1183                         require_once ( 'SpecialValidate.php' ) ;
1184                         $wgOut->setPagetitle( wfMsg( 'validate' ) . ': ' . $this->mTitle->getPrefixedText() );
1185                         $wgOut->setRobotpolicy( 'noindex,follow' );
1186                         if( $this->mTitle->getNamespace() != 0 ) {
1187                                 $wgOut->addHTML( wfMsg( 'val_validate_article_namespace_only' ) );
1188                                 return;
1189                         }
1190                         $v = new Validation;
1191                         $v->validate_form( $this->mTitle->getDBkey() );
1192                 } else {
1193                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
1194                 }
1195         }
1196
1197         /**
1198          * Mark this particular edit as patrolled
1199          */
1200         function markpatrolled() {
1201                 global $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgUseRCPatrol, $wgUser;
1202                 $wgOut->setRobotpolicy( 'noindex,follow' );
1203
1204                 if ( !$wgUseRCPatrol )
1205                 {
1206                         $wgOut->errorpage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1207                         return;
1208                 }
1209                 if ( $wgUser->getID() == 0 )
1210                 {
1211                         $wgOut->loginToUse();
1212                         return;
1213                 }
1214                 if ( $wgOnlySysopsCanPatrol && !$wgUser->isSysop() )
1215                 {
1216                         $wgOut->sysopRequired();
1217                         return;
1218                 }
1219                 $rcid = $wgRequest->getVal( 'rcid' );
1220                 if ( !is_null ( $rcid ) )
1221                 {
1222                         RecentChange::markPatrolled( $rcid );
1223                         $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
1224                         $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
1225                         $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1226                 }
1227                 else
1228                 {
1229                         $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1230                 }
1231         }
1232
1233
1234         /**
1235          * Add or remove this page to my watchlist based on value of $add
1236          */
1237         function watch( $add = true ) {
1238                 global $wgUser, $wgOut, $wgLang;
1239                 global $wgDeferredUpdateList;
1240
1241                 if ( 0 == $wgUser->getID() ) {
1242                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1243                         return;
1244                 }
1245                 if ( wfReadOnly() ) {
1246                         $wgOut->readOnlyPage();
1247                         return;
1248                 }
1249                 if( $add )
1250                         $wgUser->addWatch( $this->mTitle );
1251                 else
1252                         $wgUser->removeWatch( $this->mTitle );
1253
1254                 $wgOut->setPagetitle( wfMsg( $add ? 'addedwatch' : 'removedwatch' ) );
1255                 $wgOut->setRobotpolicy( 'noindex,follow' );
1256
1257                 $sk = $wgUser->getSkin() ;
1258                 $link = $this->mTitle->getPrefixedText();
1259
1260                 if($add)
1261                         $text = wfMsg( 'addedwatchtext', $link );
1262                 else
1263                         $text = wfMsg( 'removedwatchtext', $link );
1264                 $wgOut->addWikiText( $text );
1265
1266                 $up = new UserUpdate();
1267                 array_push( $wgDeferredUpdateList, $up );
1268
1269                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1270         }
1271
1272         /**
1273          * Stop watching a page, it act just like a call to watch(false)
1274          */
1275         function unwatch() {
1276                 $this->watch( false );
1277         }
1278
1279         /**
1280          * protect a page
1281          */
1282         function protect( $limit = 'sysop' ) {
1283                 global $wgUser, $wgOut, $wgRequest;
1284
1285                 if ( ! $wgUser->isSysop() ) {
1286                         $wgOut->sysopRequired();
1287                         return;
1288                 }
1289                 if ( wfReadOnly() ) {
1290                         $wgOut->readOnlyPage();
1291                         return;
1292                 }
1293                 $id = $this->mTitle->getArticleID();
1294                 if ( 0 == $id ) {
1295                         $wgOut->fatalError( wfMsg( 'badarticleerror' ) );
1296                         return;
1297                 }
1298
1299                 $confirm = $wgRequest->getBool( 'wpConfirmProtect' ) && $wgRequest->wasPosted();
1300                 $reason = $wgRequest->getText( 'wpReasonProtect' );
1301
1302                 if ( $confirm ) {
1303                         $dbw =& wfGetDB( DB_MASTER );
1304                         $dbw->updateArray( 'cur',
1305                                 array( /* SET */
1306                                         'cur_touched' => $dbw->timestamp(),
1307                                         'cur_restrictions' => (string)$limit
1308                                 ), array( /* WHERE */
1309                                         'cur_id' => $id
1310                                 ), 'Article::protect'
1311                         );
1312
1313                         $log = new LogPage( 'protect' );
1314                         if ( $limit === '' ) {
1315                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1316                         } else {
1317                                         $log->addEntry( 'protect', $this->mTitle, $reason );
1318                         }
1319                         $wgOut->redirect( $this->mTitle->getFullURL() );
1320                         return;
1321                 } else {
1322                         $reason = htmlspecialchars( wfMsg( 'protectreason' ) );
1323                         return $this->confirmProtect( '', $reason, $limit );
1324                 }
1325         }
1326
1327         /**
1328          * Output protection confirmation dialog
1329          */
1330         function confirmProtect( $par, $reason, $limit = 'sysop'  ) {
1331                 global $wgOut;
1332
1333                 wfDebug( "Article::confirmProtect\n" );
1334
1335                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1336                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1337
1338                 $check = '';
1339                 $protcom = '';
1340
1341                 if ( $limit === '' ) {
1342                         $wgOut->setPageTitle( wfMsg( 'confirmunprotect' ) );
1343                         $wgOut->setSubtitle( wfMsg( 'unprotectsub', $sub ) );
1344                         $wgOut->addWikiText( wfMsg( 'confirmunprotecttext' ) );
1345                         $check = htmlspecialchars( wfMsg( 'confirmunprotect' ) );
1346                         $protcom = htmlspecialchars( wfMsg( 'unprotectcomment' ) );
1347                         $formaction = $this->mTitle->escapeLocalURL( 'action=unprotect' . $par );
1348                 } else {
1349                         $wgOut->setPageTitle( wfMsg( 'confirmprotect' ) );
1350                         $wgOut->setSubtitle( wfMsg( 'protectsub', $sub ) );
1351                         $wgOut->addWikiText( wfMsg( 'confirmprotecttext' ) );
1352                         $check = htmlspecialchars( wfMsg( 'confirmprotect' ) );
1353                         $protcom = htmlspecialchars( wfMsg( 'protectcomment' ) );
1354                         $formaction = $this->mTitle->escapeLocalURL( 'action=protect' . $par );
1355                 }
1356
1357                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1358
1359                 $wgOut->addHTML( "
1360 <form id='protectconfirm' method='post' action=\"{$formaction}\">
1361         <table border='0'>
1362                 <tr>
1363                         <td align='right'>
1364                                 <label for='wpReasonProtect'>{$protcom}:</label>
1365                         </td>
1366                         <td align='left'>
1367                                 <input type='text' size='60' name='wpReasonProtect' id='wpReasonProtect' value=\"" . htmlspecialchars( $reason ) . "\" />
1368                         </td>
1369                 </tr>
1370                 <tr>
1371                         <td>&nbsp;</td>
1372                 </tr>
1373                 <tr>
1374                         <td align='right'>
1375                                 <input type='checkbox' name='wpConfirmProtect' value='1' id='wpConfirmProtect' />
1376                         </td>
1377                         <td>
1378                                 <label for='wpConfirmProtect'>{$check}</label>
1379                         </td>
1380                 </tr>
1381                 <tr>
1382                         <td>&nbsp;</td>
1383                         <td>
1384                                 <input type='submit' name='wpConfirmProtectB' value=\"{$confirm}\" />
1385                         </td>
1386                 </tr>
1387         </table>
1388 </form>\n" );
1389
1390                 $wgOut->returnToMain( false );
1391         }
1392
1393         /**
1394          * Unprotect the pages
1395          */
1396         function unprotect() {
1397                 return $this->protect( '' );
1398         }
1399
1400         /*
1401          * UI entry point for page deletion
1402          */
1403         function delete() {
1404                 global $wgUser, $wgOut, $wgMessageCache, $wgRequest;
1405                 $fname = 'Article::delete';
1406                 $confirm = $wgRequest->getBool( 'wpConfirm' ) && $wgRequest->wasPosted();
1407                 $reason = $wgRequest->getText( 'wpReason' );
1408
1409                 # This code desperately needs to be totally rewritten
1410
1411                 # Check permissions
1412                 if ( ( ! $wgUser->isSysop() ) ) {
1413                         $wgOut->sysopRequired();
1414                         return;
1415                 }
1416                 if ( wfReadOnly() ) {
1417                         $wgOut->readOnlyPage();
1418                         return;
1419                 }
1420
1421                 # Better double-check that it hasn't been deleted yet!
1422                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1423                 if ( ( '' == trim( $this->mTitle->getText() ) )
1424                   or ( $this->mTitle->getArticleId() == 0 ) ) {
1425                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1426                         return;
1427                 }
1428
1429                 if ( $confirm ) {
1430                         $this->doDelete( $reason );
1431                         return;
1432                 }
1433
1434                 # determine whether this page has earlier revisions
1435                 # and insert a warning if it does
1436                 # we select the text because it might be useful below
1437                 $dbr =& $this->getDB();
1438                 $ns = $this->mTitle->getNamespace();
1439                 $title = $this->mTitle->getDBkey();
1440                 $old = $dbr->getArray( 'old',
1441                         array( 'old_text', 'old_flags' ),
1442                         array(
1443                                 'old_namespace' => $ns,
1444                                 'old_title' => $title,
1445                         ), $fname, $this->getSelectOptions( array( 'ORDER BY' => 'inverse_timestamp' ) )
1446                 );
1447
1448                 if( $old !== false && !$confirm ) {
1449                         $skin=$wgUser->getSkin();
1450                         $wgOut->addHTML('<b>'.wfMsg('historywarning'));
1451                         $wgOut->addHTML( $skin->historyLink() .'</b>');
1452                 }
1453
1454                 # Fetch cur_text
1455                 $s = $dbr->getArray( 'cur',
1456                         array( 'cur_text' ),
1457                         array(
1458                                 'cur_namespace' => $ns,
1459                                 'cur_title' => $title,
1460                         ), $fname, $this->getSelectOptions()
1461                 );
1462
1463                 if( $s !== false ) {
1464                         # if this is a mini-text, we can paste part of it into the deletion reason
1465
1466                         #if this is empty, an earlier revision may contain "useful" text
1467                         $blanked = false;
1468                         if($s->cur_text != '') {
1469                                 $text=$s->cur_text;
1470                         } else {
1471                                 if($old) {
1472                                         $text = Article::getRevisionText( $old );
1473                                         $blanked = true;
1474                                 }
1475
1476                         }
1477
1478                         $length=strlen($text);
1479
1480                         # this should not happen, since it is not possible to store an empty, new
1481                         # page. Let's insert a standard text in case it does, though
1482                         if($length == 0 && $reason === '') {
1483                                 $reason = wfMsg('exblank');
1484                         }
1485
1486                         if($length < 500 && $reason === '') {
1487
1488                                 # comment field=255, let's grep the first 150 to have some user
1489                                 # space left
1490                                 $text=substr($text,0,150);
1491                                 # let's strip out newlines and HTML tags
1492                                 $text=preg_replace('/\"/',"'",$text);
1493                                 $text=preg_replace('/\</','&lt;',$text);
1494                                 $text=preg_replace('/\>/','&gt;',$text);
1495                                 $text=preg_replace("/[\n\r]/",'',$text);
1496                                 if(!$blanked) {
1497                                         $reason=wfMsg('excontent'). " '".$text;
1498                                 } else {
1499                                         $reason=wfMsg('exbeforeblank') . " '".$text;
1500                                 }
1501                                 if($length>150) { $reason .= '...'; } # we've only pasted part of the text
1502                                 $reason.="'";
1503                         }
1504                 }
1505
1506                 return $this->confirmDelete( '', $reason );
1507         }
1508
1509         /**
1510          * Output deletion confirmation dialog
1511          */
1512         function confirmDelete( $par, $reason ) {
1513                 global $wgOut;
1514
1515                 wfDebug( "Article::confirmDelete\n" );
1516
1517                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1518                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1519                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1520                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1521
1522                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1523
1524                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1525                 $check = htmlspecialchars( wfMsg( 'confirmcheck' ) );
1526                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1527
1528                 $wgOut->addHTML( "
1529 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1530         <table border='0'>
1531                 <tr>
1532                         <td align='right'>
1533                                 <label for='wpReason'>{$delcom}:</label>
1534                         </td>
1535                         <td align='left'>
1536                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1537                         </td>
1538                 </tr>
1539                 <tr>
1540                         <td>&nbsp;</td>
1541                 </tr>
1542                 <tr>
1543                         <td align='right'>
1544                                 <input type='checkbox' name='wpConfirm' value='1' id='wpConfirm' />
1545                         </td>
1546                         <td>
1547                                 <label for='wpConfirm'>{$check}</label>
1548                         </td>
1549                 </tr>
1550                 <tr>
1551                         <td>&nbsp;</td>
1552                         <td>
1553                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1554                         </td>
1555                 </tr>
1556         </table>
1557 </form>\n" );
1558
1559                 $wgOut->returnToMain( false );
1560         }
1561
1562
1563         /**
1564          * Perform a deletion and output success or failure messages
1565          */
1566         function doDelete( $reason ) {
1567                 global $wgOut, $wgUser, $wgLang;
1568                 $fname = 'Article::doDelete';
1569                 wfDebug( $fname."\n" );
1570
1571                 if ( $this->doDeleteArticle( $reason ) ) {
1572                         $deleted = $this->mTitle->getPrefixedText();
1573
1574                         $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1575                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
1576
1577                         $sk = $wgUser->getSkin();
1578                         $loglink = $sk->makeKnownLink( $wgLang->getNsText( NS_PROJECT ) .
1579                           ':' . wfMsg( 'dellogpage' ), wfMsg( 'deletionlog' ) );
1580
1581                         $text = wfMsg( 'deletedtext', $deleted, $loglink );
1582
1583                         $wgOut->addHTML( '<p>' . $text . "</p>\n" );
1584                         $wgOut->returnToMain( false );
1585                 } else {
1586                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1587                 }
1588         }
1589
1590         /**
1591          * Back-end article deletion
1592          * Deletes the article with database consistency, writes logs, purges caches
1593          * Returns success
1594          */
1595         function doDeleteArticle( $reason ) {
1596                 global $wgUser, $wgLang;
1597                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
1598
1599                 $fname = 'Article::doDeleteArticle';
1600                 wfDebug( $fname."\n" );
1601
1602                 $dbw =& wfGetDB( DB_MASTER );
1603                 $ns = $this->mTitle->getNamespace();
1604                 $t = $this->mTitle->getDBkey();
1605                 $id = $this->mTitle->getArticleID();
1606
1607                 if ( $t == '' || $id == 0 ) {
1608                         return false;
1609                 }
1610
1611                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
1612                 array_push( $wgDeferredUpdateList, $u );
1613
1614                 $linksTo = $this->mTitle->getLinksTo();
1615
1616                 # Squid purging
1617                 if ( $wgUseSquid ) {
1618                         $urls = array(
1619                                 $this->mTitle->getInternalURL(),
1620                                 $this->mTitle->getInternalURL( 'history' )
1621                         );
1622                         foreach ( $linksTo as $linkTo ) {
1623                                 $urls[] = $linkTo->getInternalURL();
1624                         }
1625
1626                         $u = new SquidUpdate( $urls );
1627                         array_push( $wgDeferredUpdateList, $u );
1628
1629                 }
1630
1631                 # Client and file cache invalidation
1632                 Title::touchArray( $linksTo );
1633
1634                 # Move article and history to the "archive" table
1635                 $archiveTable = $dbw->tableName( 'archive' );
1636                 $oldTable = $dbw->tableName( 'old' );
1637                 $curTable = $dbw->tableName( 'cur' );
1638                 $recentchangesTable = $dbw->tableName( 'recentchanges' );
1639                 $linksTable = $dbw->tableName( 'links' );
1640                 $brokenlinksTable = $dbw->tableName( 'brokenlinks' );
1641
1642                 $dbw->insertSelect( 'archive', 'cur',
1643                         array(
1644                                 'ar_namespace' => 'cur_namespace',
1645                                 'ar_title' => 'cur_title',
1646                                 'ar_text' => 'cur_text',
1647                                 'ar_comment' => 'cur_comment',
1648                                 'ar_user' => 'cur_user',
1649                                 'ar_user_text' => 'cur_user_text',
1650                                 'ar_timestamp' => 'cur_timestamp',
1651                                 'ar_minor_edit' => 'cur_minor_edit',
1652                                 'ar_flags' => 0,
1653                         ), array(
1654                                 'cur_namespace' => $ns,
1655                                 'cur_title' => $t,
1656                         ), $fname
1657                 );
1658
1659                 $dbw->insertSelect( 'archive', 'old',
1660                         array(
1661                                 'ar_namespace' => 'old_namespace',
1662                                 'ar_title' => 'old_title',
1663                                 'ar_text' => 'old_text',
1664                                 'ar_comment' => 'old_comment',
1665                                 'ar_user' => 'old_user',
1666                                 'ar_user_text' => 'old_user_text',
1667                                 'ar_timestamp' => 'old_timestamp',
1668                                 'ar_minor_edit' => 'old_minor_edit',
1669                                 'ar_flags' => 'old_flags'
1670                         ), array(
1671                                 'old_namespace' => $ns,
1672                                 'old_title' => $t,
1673                         ), $fname
1674                 );
1675
1676                 # Now that it's safely backed up, delete it
1677
1678                 $dbw->delete( 'cur', array( 'cur_namespace' => $ns, 'cur_title' => $t ), $fname );
1679                 $dbw->delete( 'old', array( 'old_namespace' => $ns, 'old_title' => $t ), $fname );
1680                 $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), $fname );
1681
1682                 # Finally, clean up the link tables
1683                 $t = $this->mTitle->getPrefixedDBkey();
1684
1685                 Article::onArticleDelete( $this->mTitle );
1686
1687                 # Insert broken links
1688                 $brokenLinks = array();
1689                 foreach ( $linksTo as $titleObj ) {
1690                         # Get article ID. Efficient because it was loaded into the cache by getLinksTo().
1691                         $linkID = $titleObj->getArticleID();
1692                         $brokenLinks[] = array( 'bl_from' => $linkID, 'bl_to' => $t );
1693                 }
1694                 $dbw->insertArray( 'brokenlinks', $brokenLinks, $fname, 'IGNORE' );
1695
1696                 # Delete live links
1697                 $dbw->delete( 'links', array( 'l_to' => $id ) );
1698                 $dbw->delete( 'links', array( 'l_from' => $id ) );
1699                 $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
1700                 $dbw->delete( 'brokenlinks', array( 'bl_from' => $id ) );
1701                 $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
1702
1703                 # Log the deletion
1704                 $log = new LogPage( 'delete' );
1705                 $log->addEntry( 'delete', $this->mTitle, $reason );
1706
1707                 # Clear the cached article id so the interface doesn't act like we exist
1708                 $this->mTitle->resetArticleID( 0 );
1709                 $this->mTitle->mArticleID = 0;
1710                 return true;
1711         }
1712
1713         /**
1714          * Revert a modification
1715          */
1716         function rollback() {
1717                 global $wgUser, $wgLang, $wgOut, $wgRequest;
1718                 $fname = 'Article::rollback';
1719
1720                 if ( ! $wgUser->isSysop() ) {
1721                         $wgOut->sysopRequired();
1722                         return;
1723                 }
1724                 if ( wfReadOnly() ) {
1725                         $wgOut->readOnlyPage( $this->getContent( true ) );
1726                         return;
1727                 }
1728                 $dbw =& wfGetDB( DB_MASTER );
1729
1730                 # Enhanced rollback, marks edits rc_bot=1
1731                 $bot = $wgRequest->getBool( 'bot' );
1732
1733                 # Replace all this user's current edits with the next one down
1734                 $tt = $this->mTitle->getDBKey();
1735                 $n = $this->mTitle->getNamespace();
1736
1737                 # Get the last editor, lock table exclusively
1738                 $s = $dbw->getArray( 'cur',
1739                         array( 'cur_id','cur_user','cur_user_text','cur_comment' ),
1740                         array( 'cur_title' => $tt, 'cur_namespace' => $n ),
1741                         $fname, 'FOR UPDATE'
1742                 );
1743                 if( $s === false ) {
1744                         # Something wrong
1745                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
1746                         return;
1747                 }
1748                 $ut = $dbw->strencode( $s->cur_user_text );
1749                 $uid = $s->cur_user;
1750                 $pid = $s->cur_id;
1751
1752                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
1753                 if( $from != $s->cur_user_text ) {
1754                         $wgOut->setPageTitle(wfmsg('rollbackfailed'));
1755                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
1756                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
1757                                 htmlspecialchars( $from ),
1758                                 htmlspecialchars( $s->cur_user_text ) ) );
1759                         if($s->cur_comment != '') {
1760                                 $wgOut->addHTML(
1761                                         wfMsg('editcomment',
1762                                         htmlspecialchars( $s->cur_comment ) ) );
1763                         }
1764                         return;
1765                 }
1766
1767                 # Get the last edit not by this guy
1768                 $s = $dbw->getArray( 'old',
1769                         array( 'old_text','old_user','old_user_text','old_timestamp','old_flags' ),
1770                         array(
1771                                 'old_namespace' => $n,
1772                                 'old_title' => $tt,
1773                                 "old_user <> {$uid} OR old_user_text <> '{$ut}'"
1774                         ), $fname, array( 'FOR UPDATE', 'USE INDEX' => 'name_title_timestamp' )
1775                 );
1776                 if( $s === false ) {
1777                         # Something wrong
1778                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
1779                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
1780                         return;
1781                 }
1782
1783                 if ( $bot ) {
1784                         # Mark all reverted edits as bot
1785                         $dbw->updateArray( 'recentchanges',
1786                                 array( /* SET */
1787                                         'rc_bot' => 1
1788                                 ), array( /* WHERE */
1789                                         'rc_user' => $uid,
1790                                         "rc_timestamp > '{$s->old_timestamp}'",
1791                                 ), $fname
1792                         );
1793                 }
1794
1795                 # Save it!
1796                 $newcomment = wfMsg( 'revertpage', $s->old_user_text, $from );
1797                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1798                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1799                 $wgOut->addHTML( '<h2>' . $newcomment . "</h2>\n<hr />\n" );
1800                 $this->updateArticle( Article::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1801                 Article::onArticleEdit( $this->mTitle );
1802                 $wgOut->returnToMain( false );
1803         }
1804
1805
1806         /**
1807          * Do standard deferred updates after page view
1808          * @private
1809          */
1810         function viewUpdates() {
1811                 global $wgDeferredUpdateList;
1812                 if ( 0 != $this->getID() ) {
1813                         global $wgDisableCounters;
1814                         if( !$wgDisableCounters ) {
1815                                 Article::incViewCount( $this->getID() );
1816                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1817                                 array_push( $wgDeferredUpdateList, $u );
1818                         }
1819                 }
1820                 $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(),
1821                   $this->mTitle->getDBkey() );
1822                 array_push( $wgDeferredUpdateList, $u );
1823         }
1824
1825         /**
1826          * Do standard deferred updates after page edit.
1827          * Every 1000th edit, prune the recent changes table.
1828          * @private
1829          * @param string $text
1830          */
1831         function editUpdates( $text ) {
1832                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1833                 global $wgMessageCache;
1834
1835                 wfSeedRandom();
1836                 if ( 0 == mt_rand( 0, 999 ) ) {
1837                         $dbw =& wfGetDB( DB_MASTER );
1838                         $cutoff = wfUnix2Timestamp( time() - ( 7 * 86400 ) );
1839                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1840                         $dbw->query( $sql );
1841                 }
1842                 $id = $this->getID();
1843                 $title = $this->mTitle->getPrefixedDBkey();
1844                 $shortTitle = $this->mTitle->getDBkey();
1845
1846                 $adj = $this->mCountAdjustment;
1847
1848                 if ( 0 != $id ) {
1849                         $u = new LinksUpdate( $id, $title );
1850                         array_push( $wgDeferredUpdateList, $u );
1851                         $u = new SiteStatsUpdate( 0, 1, $adj );
1852                         array_push( $wgDeferredUpdateList, $u );
1853                         $u = new SearchUpdate( $id, $title, $text );
1854                         array_push( $wgDeferredUpdateList, $u );
1855
1856                         $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle );
1857                         array_push( $wgDeferredUpdateList, $u );
1858
1859                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1860                                 $wgMessageCache->replace( $shortTitle, $text );
1861                         }
1862                 }
1863         }
1864
1865         /**
1866          * @todo document this function
1867          * @private
1868          */
1869         function setOldSubtitle() {
1870                 global $wgLang, $wgOut, $wgUser;
1871
1872                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1873                 $sk = $wgUser->getSkin();
1874                 $lnk = $sk->makeKnownLinkObj ( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
1875                 $r = wfMsg( 'revisionasofwithlink', $td, $lnk );
1876                 $wgOut->setSubtitle( $r );
1877         }
1878
1879         /**
1880          * This function is called right before saving the wikitext,
1881          * so we can do things like signatures and links-in-context.
1882          *
1883          * @param string $text
1884          */
1885         function preSaveTransform( $text ) {
1886                 global $wgParser, $wgUser;
1887                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
1888         }
1889
1890         /* Caching functions */
1891
1892         /**
1893          * checkLastModified returns true if it has taken care of all
1894          * output to the client that is necessary for this request.
1895          * (that is, it has sent a cached version of the page)
1896          */
1897         function tryFileCache() {
1898                 static $called = false;
1899                 if( $called ) {
1900                         wfDebug( " tryFileCache() -- called twice!?\n" );
1901                         return;
1902                 }
1903                 $called = true;
1904                 if($this->isFileCacheable()) {
1905                         $touched = $this->mTouched;
1906                         if( $this->mTitle->getPrefixedDBkey() == wfMsg( 'mainpage' ) ) {
1907                                 # Expire the main page quicker
1908                                 $expire = wfUnix2Timestamp( time() - 3600 );
1909                                 $touched = max( $expire, $touched );
1910                         }
1911                         $cache = new CacheManager( $this->mTitle );
1912                         if($cache->isFileCacheGood( $touched )) {
1913                                 global $wgOut;
1914                                 wfDebug( " tryFileCache() - about to load\n" );
1915                                 $cache->loadFromFileCache();
1916                                 return true;
1917                         } else {
1918                                 wfDebug( " tryFileCache() - starting buffer\n" );
1919                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1920                         }
1921                 } else {
1922                         wfDebug( " tryFileCache() - not cacheable\n" );
1923                 }
1924         }
1925
1926         /**
1927          * Check if the page can be cached
1928          * @return bool
1929          */
1930         function isFileCacheable() {
1931                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
1932                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
1933
1934                 return $wgUseFileCache
1935                         and (!$wgShowIPinHeader)
1936                         and ($this->getID() != 0)
1937                         and ($wgUser->getId() == 0)
1938                         and (!$wgUser->getNewtalk())
1939                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
1940                         and (empty( $action ) || $action == 'view')
1941                         and (!isset($oldid))
1942                         and (!isset($diff))
1943                         and (!isset($redirect))
1944                         and (!isset($printable))
1945                         and (!$this->mRedirectedFrom);
1946         }
1947
1948         /**
1949          * Loads cur_touched and returns a value indicating if it should be used
1950          *
1951          */
1952         function checkTouched() {
1953                 $fname = 'Article::checkTouched';
1954                 $id = $this->getID();
1955                 $dbr =& $this->getDB();
1956                 $s = $dbr->getArray( 'cur', array( 'cur_touched', 'cur_is_redirect' ),
1957                         array( 'cur_id' => $id ), $fname, $this->getSelectOptions() );
1958                 if( $s !== false ) {
1959                         $this->mTouched = wfTimestamp(TS_MW,$s->cur_touched);
1960                         return !$s->cur_is_redirect;
1961                 } else {
1962                         return false;
1963                 }
1964         }
1965
1966         /**
1967          * Edit an article without doing all that other stuff
1968          *
1969          * @param string $text text submitted
1970          * @param string $comment comment submitted
1971          * @param integer $minor whereas it's a minor modification
1972          */
1973         function quickEdit( $text, $comment = '', $minor = 0 ) {
1974                 global $wgUser, $wgMwRedir;
1975                 $fname = 'Article::quickEdit';
1976                 wfProfileIn( $fname );
1977
1978                 $dbw =& wfGetDB( DB_MASTER );
1979                 $ns = $this->mTitle->getNamespace();
1980                 $dbkey = $this->mTitle->getDBkey();
1981                 $encDbKey = $dbw->strencode( $dbkey );
1982                 $timestamp = wfTimestampNow();
1983
1984                 # Save to history
1985                 $dbw->insertSelect( 'old', 'cur',
1986                         array(
1987                                 'old_namespace' => 'cur_namespace',
1988                                 'old_title' => 'cur_title',
1989                                 'old_text' => 'cur_text',
1990                                 'old_comment' => 'cur_comment',
1991                                 'old_user' => 'cur_user',
1992                                 'old_user_text' => 'cur_user_text',
1993                                 'old_timestamp' => 'cur_timestamp',
1994                                 'inverse_timestamp' => '99999999999999-cur_timestamp',
1995                         ), array(
1996                                 'cur_namespace' => $ns,
1997                                 'cur_title' => $dbkey,
1998                         ), $fname
1999                 );
2000
2001                 # Use the affected row count to determine if the article is new
2002                 $numRows = $dbw->affectedRows();
2003
2004                 # Make an array of fields to be inserted
2005                 $fields = array(
2006                         'cur_text' => $text,
2007                         'cur_timestamp' => $timestamp,
2008                         'cur_user' => $wgUser->getID(),
2009                         'cur_user_text' => $wgUser->getName(),
2010                         'inverse_timestamp' => wfInvertTimestamp( $timestamp ),
2011                         'cur_comment' => $comment,
2012                         'cur_is_redirect' => $wgMwRedir->matchStart( $text ) ? 1 : 0,
2013                         'cur_minor_edit' => intval($minor),
2014                         'cur_touched' => $dbw->timestamp($timestamp),
2015                 );
2016
2017                 if ( $numRows ) {
2018                         # Update article
2019                         $fields['cur_is_new'] = 0;
2020                         $dbw->updateArray( 'cur', $fields, array( 'cur_namespace' => $ns, 'cur_title' => $dbkey ), $fname );
2021                 } else {
2022                         # Insert new article
2023                         $fields['cur_is_new'] = 1;
2024                         $fields['cur_namespace'] = $ns;
2025                         $fields['cur_title'] = $dbkey;
2026                         $fields['cur_random'] = $rand = number_format( mt_rand() / mt_getrandmax(), 12, '.', '' );
2027                         $dbw->insertArray( 'cur', $fields, $fname );
2028                 }
2029                 wfProfileOut( $fname );
2030         }
2031
2032         /**
2033          * Used to increment the view counter
2034          *
2035          * @static
2036          * @param integer $id article id
2037          */
2038         function incViewCount( $id ) {
2039                 $id = intval( $id );
2040                 global $wgHitcounterUpdateFreq;
2041
2042                 $dbw =& wfGetDB( DB_MASTER );
2043                 $curTable = $dbw->tableName( 'cur' );
2044                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
2045                 $acchitsTable = $dbw->tableName( 'acchits' );
2046
2047                 if( $wgHitcounterUpdateFreq <= 1 ){ //
2048                         $dbw->query( "UPDATE $curTable SET cur_counter = cur_counter + 1 WHERE cur_id = $id" );
2049                         return;
2050                 }
2051
2052                 # Not important enough to warrant an error page in case of failure
2053                 $oldignore = $dbw->ignoreErrors( true );
2054
2055                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2056
2057                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2058                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2059                         # Most of the time (or on SQL errors), skip row count check
2060                         $dbw->ignoreErrors( $oldignore );
2061                         return;
2062                 }
2063
2064                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2065                 $row = $dbw->fetchObject( $res );
2066                 $rown = intval( $row->n );
2067                 if( $rown >= $wgHitcounterUpdateFreq ){
2068                         wfProfileIn( 'Article::incViewCount-collect' );
2069                         $old_user_abort = ignore_user_abort( true );
2070
2071                         $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2072                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable TYPE=HEAP ".
2073                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2074                                 'GROUP BY hc_id');
2075                         $dbw->query("DELETE FROM $hitcounterTable");
2076                         $dbw->query('UNLOCK TABLES');
2077                         $dbw->query("UPDATE $curTable,$acchitsTable SET cur_counter=cur_counter + hc_n ".
2078                                 'WHERE cur_id = hc_id');
2079                         $dbw->query("DROP TABLE $acchitsTable");
2080
2081                         ignore_user_abort( $old_user_abort );
2082                         wfProfileOut( 'Article::incViewCount-collect' );
2083                 }
2084                 $dbw->ignoreErrors( $oldignore );
2085         }
2086
2087         /**#@+
2088          * The onArticle*() functions are supposed to be a kind of hooks
2089          * which should be called whenever any of the specified actions
2090          * are done.
2091          *
2092          * This is a good place to put code to clear caches, for instance.
2093          *
2094          * This is called on page move and undelete, as well as edit
2095          * @static
2096          * @param $title_obj a title object
2097          */
2098
2099         function onArticleCreate($title_obj) {
2100                 global $wgUseSquid, $wgDeferredUpdateList;
2101
2102                 $titles = $title_obj->getBrokenLinksTo();
2103
2104                 # Purge squid
2105                 if ( $wgUseSquid ) {
2106                         $urls = $title_obj->getSquidURLs();
2107                         foreach ( $titles as $linkTitle ) {
2108                                 $urls[] = $linkTitle->getInternalURL();
2109                         }
2110                         $u = new SquidUpdate( $urls );
2111                         array_push( $wgDeferredUpdateList, $u );
2112                 }
2113
2114                 # Clear persistent link cache
2115                 LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
2116         }
2117
2118         function onArticleDelete($title_obj) {
2119                 LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
2120         }
2121         function onArticleEdit($title_obj) {
2122                 LinkCache::linksccClearPage( $title_obj->getArticleID() );
2123         }
2124         /**#@-*/
2125
2126         /**
2127          * Info about this page
2128          */
2129         function info() {
2130                 global $wgUser, $wgTitle, $wgOut, $wgLang, $wgAllowPageInfo;
2131                 $fname = 'Article::info';
2132
2133                 if ( !$wgAllowPageInfo ) {
2134                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
2135                         return;
2136                 }
2137
2138                 $dbr =& $this->getDB();
2139
2140                 $basenamespace = $wgTitle->getNamespace() & (~1);
2141                 $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace );
2142                 $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace );
2143                 $wl_clause  = array( 'wl_title' => $wgTitle->getDBkey(), 'wl_namespace' => $basenamespace );
2144                 $fullTitle = $wgTitle->makeName($basenamespace, $wgTitle->getDBKey());
2145                 $wgOut->setPagetitle(  $fullTitle );
2146                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
2147
2148                 # first, see if the page exists at all.
2149                 $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2150                 if ($exists < 1) {
2151                         $wgOut->addHTML( wfMsg('noarticletext') );
2152                 } else {
2153                         $numwatchers = $dbr->selectField( 'watchlist', 'COUNT(*)', $wl_clause, $fname,
2154                                 $this->getSelectOptions() );
2155                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $numwatchers) . '</li>' );
2156                         $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2157                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $old + 1) . '</li>');
2158
2159                         # to find number of distinct authors, we need to do some
2160                         # funny stuff because of the cur/old table split:
2161                         # - first, find the name of the 'cur' author
2162                         # - then, find the number of *other* authors in 'old'
2163
2164                         # find 'cur' author
2165                         $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2166                                 $this->getSelectOptions() );
2167
2168                         # find number of 'old' authors excluding 'cur' author
2169                         $authors = $dbr->selectField( 'old', 'COUNT(DISTINCT old_user_text)',
2170                                 $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ), $fname,
2171                                 $this->getSelectOptions() ) + 1;
2172
2173                         # now for the Talk page ...
2174                         $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace+1 );
2175                         $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace+1 );
2176
2177                         # does it exist?
2178                         $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2179
2180                         # number of edits
2181                         if ($exists > 0) {
2182                                 $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2183                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $old + 1) . '</li>');
2184                         }
2185                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $authors) . '</li>' );
2186
2187                         # number of authors
2188                         if ($exists > 0) {
2189                                 $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2190                                         $this->getSelectOptions() );
2191                                 $authors = $dbr->selectField( 'cur', 'COUNT(DISTINCT old_user_text)',
2192                                         $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ),
2193                                         $fname, $this->getSelectOptions() );
2194
2195                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $authors) . '</li></ul>' );
2196                         }
2197                 }
2198         }
2199 }
2200
2201 ?>