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, $wgRequest;
 396
 397                 if ( $this->mContentLoaded ) return;
 398
 399                 $dbr =& $this->getDB();
 400                 # Query variables :P
 401                 $oldid = $wgRequest->getVal( 'oldid' );
 402                 $redirect = $wgRequest->getVal( 'redirect' );
 403
 404                 $fname = 'Article::loadContent';
 405
 406                 # Pre-fill content with error message so that if something
 407                 # fails we'll have something telling us what we intended.
 408
 409                 $t = $this->mTitle->getPrefixedText();
 410                 if ( isset( $oldid ) ) {
 411                         $oldid = IntVal( $oldid );
 412                         $t .= ',oldid='.$oldid;
 413                 }
 414                 if ( isset( $redirect ) ) {
 415                         $redirect = ($redirect == 'no') ? 'no' : 'yes';
 416                         $t .= ',redirect='.$redirect;
 417                 }
 418                 $this->mContent = wfMsg( 'missingarticle', $t );
 419
 420                 if ( ! $oldid ) {       # Retrieve current version
 421                         $id = $this->getID();
 422                         if ( 0 == $id ) return;
 423
 424                         $s = $dbr->selectRow( 'cur', $this->getCurContentFields(), array( 'cur_id' => $id ), $fname,
 425                                 $this->getSelectOptions() );
 426                         if ( $s === false ) {
 427                                 return;
 428                         }
 429
 430                         # If we got a redirect, follow it (unless we've been told
 431                         # not to by either the function parameter or the query
 432                         if ( ( 'no' != $redirect ) && ( false == $noredir ) ) {
 433                                 $rt = Title::newFromRedirect( $s->cur_text );
 434                                 # process if title object is valid and not special:userlogout
 435                                 if ( $rt && ! ( $rt->getNamespace() == NS_SPECIAL && $rt->getText() == 'Userlogout' ) ) {
 436                                         # Gotta hand redirects to special pages differently:
 437                                         # Fill the HTTP response "Location" header and ignore
 438                                         # the rest of the page we're on.
 439
 440                                         if ( $rt->getInterwiki() != '' ) {
 441                                                 $wgOut->redirect( $rt->getFullURL() ) ;
 442                                                 return;
 443                                         }
 444                                         if ( $rt->getNamespace() == NS_SPECIAL ) {
 445                                                 $wgOut->redirect( $rt->getFullURL() );
 446                                                 return;
 447                                         }
 448                                         $rid = $rt->getArticleID();
 449                                         if ( 0 != $rid ) {
 450                                                 $redirRow = $dbr->selectRow( 'cur', $this->getCurContentFields(),
 451                                                         array( 'cur_id' => $rid ), $fname, $this->getSelectOptions() );
 452
 453                                                 if ( $redirRow !== false ) {
 454                                                         $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 455                                                         $this->mTitle = $rt;
 456                                                         $s = $redirRow;
 457                                                 }
 458                                         }
 459                                 }
 460                         }
 461
 462                         $this->mContent = $s->cur_text;
 463                         $this->mUser = $s->cur_user;
 464                         $this->mUserText = $s->cur_user_text;
 465                         $this->mComment = $s->cur_comment;
 466                         $this->mCounter = $s->cur_counter;
 467                         $this->mTimestamp = wfTimestamp(TS_MW,$s->cur_timestamp);
 468                         $this->mTouched = wfTimestamp(TS_MW,$s->cur_touched);
 469                         $this->mTitle->mRestrictions = explode( ',', trim( $s->cur_restrictions ) );
 470                         $this->mTitle->mRestrictionsLoaded = true;
 471                 } else { # oldid set, retrieve historical version
 472                         $s = $dbr->getArray( 'old', $this->getOldContentFields(), array( 'old_id' => $oldid ),
 473                                 $fname, $this->getSelectOptions() );
 474                         if ( $s === false ) {
 475                                 return;
 476                         }
 477
 478                         if( $this->mTitle->getNamespace() != $s->old_namespace ||
 479                                 $this->mTitle->getDBkey() != $s->old_title ) {
 480                                 $oldTitle = Title::makeTitle( $s->old_namesapce, $s->old_title );
 481                                 $this->mTitle = $oldTitle;
 482                                 $wgTitle = $oldTitle;
 483                         }
 484                         $this->mContent = Article::getRevisionText( $s );
 485                         $this->mUser = $s->old_user;
 486                         $this->mUserText = $s->old_user_text;
 487                         $this->mComment = $s->old_comment;
 488                         $this->mCounter = 0;
 489                         $this->mTimestamp = wfTimestamp(TS_MW,$s->old_timestamp);
 490                 }
 491                 $this->mContentLoaded = true;
 492                 return $this->mContent;
 493         }
 494
 495         /**
 496          * Gets the article text without using so many damn globals
 497          * Returns false on error
 498          *
 499          * @param integer $oldid
 500          */
 501         function getContentWithoutUsingSoManyDamnGlobals( $oldid = 0, $noredir = false ) {
 502                 if ( $this->mContentLoaded ) {
 503                         return $this->mContent;
 504                 }
 505                 $this->mContent = false;
 506
 507                 $fname = 'Article::getContentWithout';
 508                 $dbr =& $this->getDB();
 509
 510                 if ( ! $oldid ) {       # Retrieve current version
 511                         $id = $this->getID();
 512                         if ( 0 == $id ) {
 513                                 return false;
 514                         }
 515
 516                         $s = $dbr->selectRow( 'cur', $this->getCurContentFields(), array( 'cur_id' => $id ),
 517                                 $fname, $this->getSelectOptions() );
 518                         if ( $s === false ) {
 519                                 return false;
 520                         }
 521
 522                         # If we got a redirect, follow it (unless we've been told
 523                         # not to by either the function parameter or the query
 524                         if ( !$noredir ) {
 525                                 $rt = Title::newFromRedirect( $s->cur_text );
 526                                 if( $rt &&  $rt->getInterwiki() == '' && $rt->getNamespace() != NS_SPECIAL ) {
 527                                         $rid = $rt->getArticleID();
 528                                         if ( 0 != $rid ) {
 529                                                 $redirRow = $dbr->selectRow( 'cur', $this->getCurContentFields(),
 530                                                         array( 'cur_id' => $rid ), $fname, $this->getSelectOptions() );
 531
 532                                                 if ( $redirRow !== false ) {
 533                                                         $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 534                                                         $this->mTitle = $rt;
 535                                                         $s = $redirRow;
 536                                                 }
 537                                         }
 538                                 }
 539                         }
 540
 541                         $this->mContent = $s->cur_text;
 542                         $this->mUser = $s->cur_user;
 543                         $this->mUserText = $s->cur_user_text;
 544                         $this->mComment = $s->cur_comment;
 545                         $this->mCounter = $s->cur_counter;
 546                         $this->mTimestamp = wfTimestamp(TS_MW,$s->cur_timestamp);
 547                         $this->mTouched = wfTimestamp(TS_MW,$s->cur_touched);
 548                         $this->mTitle->mRestrictions = explode( ',', trim( $s->cur_restrictions ) );
 549                         $this->mTitle->mRestrictionsLoaded = true;
 550                 } else { # oldid set, retrieve historical version
 551                         $s = $dbr->selectRow( 'old', $this->getOldContentFields(), array( 'old_id' => $oldid ),
 552                                 $fname, $this->getSelectOptions() );
 553                         if ( $s === false ) {
 554                                 return false;
 555                         }
 556                         $this->mContent = Article::getRevisionText( $s );
 557                         $this->mUser = $s->old_user;
 558                         $this->mUserText = $s->old_user_text;
 559                         $this->mComment = $s->old_comment;
 560                         $this->mCounter = 0;
 561                         $this->mTimestamp = wfTimestamp(TS_MW,$s->old_timestamp);
 562                 }
 563                 $this->mContentLoaded = true;
 564                 return $this->mContent;
 565         }
 566
 567         /**
 568          * Read/write accessor to select FOR UPDATE
 569          */
 570         function forUpdate( $x = NULL ) {
 571                 return wfSetVar( $this->mForUpdate, $x );
 572         }
 573
 574         /**
 575          * Get the database which should be used for reads
 576          */
 577         function &getDB() {
 578                 if ( $this->mForUpdate ) {
 579                         return wfGetDB( DB_MASTER );
 580                 } else {
 581                         return wfGetDB( DB_SLAVE );
 582                 }
 583         }
 584
 585         /**
 586          * Get options for all SELECT statements
 587          * Can pass an option array, to which the class-wide options will be appended
 588          */
 589         function getSelectOptions( $options = '' ) {
 590                 if ( $this->mForUpdate ) {
 591                         if ( $options ) {
 592                                 $options[] = 'FOR UPDATE';
 593                         } else {
 594                                 $options = 'FOR UPDATE';
 595                         }
 596                 }
 597                 return $options;
 598         }
 599
 600         /**
 601          * Return the Article ID
 602          */
 603         function getID() {
 604                 if( $this->mTitle ) {
 605                         return $this->mTitle->getArticleID();
 606                 } else {
 607                         return 0;
 608                 }
 609         }
 610
 611         /**
 612          * Get the view count for this article
 613          */
 614         function getCount() {
 615                 if ( -1 == $this->mCounter ) {
 616                         $id = $this->getID();
 617                         $dbr =& $this->getDB();
 618                         $this->mCounter = $dbr->selectField( 'cur', 'cur_counter', 'cur_id='.$id,
 619                                 'Article::getCount', $this->getSelectOptions() );
 620                 }
 621                 return $this->mCounter;
 622         }
 623
 624         /**
 625          * Would the given text make this article a "good" article (i.e.,
 626          * suitable for including in the article count)?
 627          */
 628         function isCountable( $text ) {
 629                 global $wgUseCommaCount;
 630
 631                 if ( 0 != $this->mTitle->getNamespace() ) { return 0; }
 632                 if ( $this->isRedirect( $text ) ) { return 0; }
 633                 $token = ($wgUseCommaCount ? ',' : '[[' );
 634                 if ( false === strstr( $text, $token ) ) { return 0; }
 635                 return 1;
 636         }
 637
 638         /**
 639          * Tests if the article text represents a redirect
 640          */
 641         function isRedirect( $text = false ) {
 642                 if ( $text === false ) {
 643                         $this->loadContent();
 644                         $titleObj = Title::newFromRedirect( $this->mText );
 645                 } else {
 646                         $titleObj = Title::newFromRedirect( $text );
 647                 }
 648                 return $titleObj !== NULL;
 649         }
 650
 651         /**
 652          * Loads everything from cur except cur_text
 653          * This isn't necessary for all uses, so it's only done if needed.
 654          * @private
 655          */
 656         function loadLastEdit() {
 657                 global $wgOut;
 658                 if ( -1 != $this->mUser ) return;
 659
 660                 $fname = 'Article::loadLastEdit';
 661
 662                 $dbr =& $this->getDB();
 663                 $s = $dbr->getArray( 'cur',
 664                   array( 'cur_user','cur_user_text','cur_timestamp', 'cur_comment','cur_minor_edit' ),
 665                   array( 'cur_id' => $this->getID() ), $fname, $this->getSelectOptions() );
 666
 667                 if ( $s !== false ) {
 668                         $this->mUser = $s->cur_user;
 669                         $this->mUserText = $s->cur_user_text;
 670                         $this->mTimestamp = wfTimestamp(TS_MW,$s->cur_timestamp);
 671                         $this->mComment = $s->cur_comment;
 672                         $this->mMinorEdit = $s->cur_minor_edit;
 673                 }
 674         }
 675
 676         function getTimestamp() {
 677                 $this->loadLastEdit();
 678                 return $this->mTimestamp;
 679         }
 680
 681         function getUser() {
 682                 $this->loadLastEdit();
 683                 return $this->mUser;
 684         }
 685
 686         function getUserText() {
 687                 $this->loadLastEdit();
 688                 return $this->mUserText;
 689         }
 690
 691         function getComment() {
 692                 $this->loadLastEdit();
 693                 return $this->mComment;
 694         }
 695
 696         function getMinorEdit() {
 697                 $this->loadLastEdit();
 698                 return $this->mMinorEdit;
 699         }
 700
 701         function getContributors($limit = 0, $offset = 0) {
 702                 $fname = 'Article::getContributors';
 703
 704                 # XXX: this is expensive; cache this info somewhere.
 705
 706                 $title = $this->mTitle;
 707                 $contribs = array();
 708                 $dbr =& $this->getDB();
 709                 $oldTable = $dbr->tableName( 'old' );
 710                 $userTable = $dbr->tableName( 'user' );
 711                 $encDBkey = $dbr->addQuotes( $title->getDBkey() );
 712                 $ns = $title->getNamespace();
 713                 $user = $this->getUser();
 714
 715                 $sql = "SELECT old_user, old_user_text, user_real_name, MAX(old_timestamp) as timestamp
 716                         FROM $oldTable LEFT JOIN $userTable ON old_user = user_id
 717                         WHERE old_namespace = $user
 718                         AND old_title = $encDBkey
 719                         AND old_user != $user
 720                         GROUP BY old_user, old_user_text, user_real_name
 721                         ORDER BY timestamp DESC";
 722
 723                 if ($limit > 0) { $sql .= ' LIMIT '.$limit; }
 724                 $sql .= ' '. $this->getSelectOptions();
 725
 726                 $res = $dbr->query($sql, $fname);
 727
 728                 while ( $line = $dbr->fetchObject( $res ) ) {
 729                         $contribs[] = array($line->old_user, $line->old_user_text, $line->user_real_name);
 730                 }
 731
 732                 $dbr->freeResult($res);
 733                 return $contribs;
 734         }
 735
 736         /**
 737          * This is the default action of the script: just view the page of
 738          * the given title.
 739         */
 740         function view() {
 741                 global $wgUser, $wgOut, $wgLang, $wgRequest, $wgOnlySysopsCanPatrol;
 742                 global $wgLinkCache, $IP, $wgEnableParserCache, $wgStylePath, $wgUseRCPatrol;
 743                 $sk = $wgUser->getSkin();
 744
 745                 $fname = 'Article::view';
 746                 wfProfileIn( $fname );
 747                 # Get variables from query string
 748                 $oldid = $wgRequest->getVal( 'oldid' );
 749                 $diff = $wgRequest->getVal( 'diff' );
 750                 $rcid = $wgRequest->getVal( 'rcid' );
 751
 752                 $wgOut->setArticleFlag( true );
 753                 $wgOut->setRobotpolicy( 'index,follow' );
 754                 # If we got diff and oldid in the query, we want to see a
 755                 # diff page instead of the article.
 756
 757                 if ( !is_null( $diff ) ) {
 758                         require_once( 'DifferenceEngine.php' );
 759                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 760                         $de = new DifferenceEngine( $oldid, $diff, $rcid );
 761                         $de->showDiffPage();
 762                         wfProfileOut( $fname );
 763                         if( $diff == 0 ) {
 764                                 # Run view updates for current revision only
 765                                 $this->viewUpdates();
 766                         }
 767                         return;
 768                 }
 769                 if ( empty( $oldid ) && $this->checkTouched() ) {
 770                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 771                                 return;
 772                         } else if ( $this->tryFileCache() ) {
 773                                 # tell wgOut that output is taken care of
 774                                 $wgOut->disable();
 775                                 $this->viewUpdates();
 776                                 return;
 777                         }
 778                 }
 779                 # Should the parser cache be used?
 780                 if ( $wgEnableParserCache && intval($wgUser->getOption( 'stubthreshold' )) == 0 && empty( $oldid ) ) {
 781                         $pcache = true;
 782                 } else {
 783                         $pcache = false;
 784                 }
 785
 786                 $outputDone = false;
 787                 if ( $pcache ) {
 788                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 789                                 $outputDone = true;
 790                         }
 791                 }
 792                 if ( !$outputDone ) {
 793                         $text = $this->getContent( false ); # May change mTitle by following a redirect
 794
 795                         # Another whitelist check in case oldid or redirects are altering the title
 796                         if ( !$this->mTitle->userCanRead() ) {
 797                                 $wgOut->loginToUse();
 798                                 $wgOut->output();
 799                                 exit;
 800                         }
 801
 802
 803                         # We're looking at an old revision
 804
 805                         if ( !empty( $oldid ) ) {
 806                                 $this->setOldSubtitle();
 807                                 $wgOut->setRobotpolicy( 'noindex,follow' );
 808                         }
 809                         if ( '' != $this->mRedirectedFrom ) {
 810                                 $sk = $wgUser->getSkin();
 811                                 $redir = $sk->makeKnownLink( $this->mRedirectedFrom, '',
 812                                   'redirect=no' );
 813                                 $s = wfMsg( 'redirectedfrom', $redir );
 814                                 $wgOut->setSubtitle( $s );
 815
 816                                 # Can't cache redirects
 817                                 $pcache = false;
 818                         }
 819
 820                         # wrap user css and user js in pre and don't parse
 821                         # XXX: use $this->mTitle->usCssJsSubpage() when php is fixed/ a workaround is found
 822                         if (
 823                                 $this->mTitle->getNamespace() == NS_USER &&
 824                                 preg_match('/\\/[\\w]+\\.(css|js)$/', $this->mTitle->getDBkey())
 825                         ) {
 826                                 $wgOut->addWikiText( wfMsg('clearyourcache'));
 827                                 $wgOut->addHTML( '<pre>'.htmlspecialchars($this->mContent)."\n</pre>" );
 828                         } else if ( $rt = Title::newFromRedirect( $text ) ) {
 829                                 # Display redirect
 830                                 $imageUrl = $wgStylePath.'/common/images/redirect.png';
 831                                 $targetUrl = $rt->escapeLocalURL();
 832                                 $titleText = htmlspecialchars( $rt->getPrefixedText() );
 833                                 $link = $sk->makeLinkObj( $rt );
 834                                 $wgOut->addHTML( '<img valign="center" src="'.$imageUrl.'">' .
 835                                   '<span class="redirectText">'.$link.'</span>' );
 836                         } else if ( $pcache ) {
 837                                 # Display content and save to parser cache
 838                                 $wgOut->addPrimaryWikiText( $text, $this );
 839                         } else {
 840                                 # Display content, don't attempt to save to parser cache
 841                                 $wgOut->addWikiText( $text );
 842                         }
 843                 }
 844                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 845                 # If we have been passed an &rcid= parameter, we want to give the user a
 846                 # chance to mark this new article as patrolled.
 847                 if ( $wgUseRCPatrol && !is_null ( $rcid ) && $rcid != 0 && $wgUser->getID() != 0 &&
 848                      ( $wgUser->isSysop() || !$wgOnlySysopsCanPatrol ) )
 849                 {
 850                         $wgOut->addHTML( wfMsg ( 'markaspatrolledlink',
 851                                 $sk->makeKnownLinkObj ( $this->mTitle, wfMsg ( 'markaspatrolledtext' ),
 852                                         'action=markpatrolled&rcid='.$rcid )
 853                          ) );
 854                 }
 855
 856                 # Put link titles into the link cache
 857                 $wgOut->transformBuffer();
 858
 859                 # Add link titles as META keywords
 860                 $wgOut->addMetaTags() ;
 861
 862                 $this->viewUpdates();
 863                 wfProfileOut( $fname );
 864         }
 865
 866         /**
 867          * Theoretically we could defer these whole insert and update
 868          * functions for after display, but that's taking a big leap
 869          * of faith, and we want to be able to report database
 870          * errors at some point.
 871          * @private
 872          */
 873         function insertNewArticle( $text, $summary, $isminor, $watchthis ) {
 874                 global $wgOut, $wgUser;
 875                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 876
 877                 $fname = 'Article::insertNewArticle';
 878
 879                 $this->mCountAdjustment = $this->isCountable( $text );
 880
 881                 $ns = $this->mTitle->getNamespace();
 882                 $ttl = $this->mTitle->getDBkey();
 883                 $text = $this->preSaveTransform( $text );
 884                 if ( $this->isRedirect( $text ) ) { $redir = 1; }
 885                 else { $redir = 0; }
 886
 887                 $now = wfTimestampNow();
 888                 $won = wfInvertTimestamp( $now );
 889                 wfSeedRandom();
 890                 $rand = number_format( mt_rand() / mt_getrandmax(), 12, '.', '' );
 891                 $dbw =& wfGetDB( DB_MASTER );
 892
 893                 $cur_id = $dbw->nextSequenceValue( 'cur_cur_id_seq' );
 894
 895                 $isminor = ( $isminor && $wgUser->getID() ) ? 1 : 0;
 896
 897                 $dbw->insertArray( 'cur', array(
 898                         'cur_id' => $cur_id,
 899                         'cur_namespace' => $ns,
 900                         'cur_title' => $ttl,
 901                         'cur_text' => $text,
 902                         'cur_comment' => $summary,
 903                         'cur_user' => $wgUser->getID(),
 904                         'cur_timestamp' => $dbw->timestamp($now),
 905                         'cur_minor_edit' => $isminor,
 906                         'cur_counter' => 0,
 907                         'cur_restrictions' => '',
 908                         'cur_user_text' => $wgUser->getName(),
 909                         'cur_is_redirect' => $redir,
 910                         'cur_is_new' => 1,
 911                         'cur_random' => $rand,
 912                         'cur_touched' => $dbw->timestamp($now),
 913                         'inverse_timestamp' => $won,
 914                 ), $fname );
 915
 916                 $newid = $dbw->insertId();
 917                 $this->mTitle->resetArticleID( $newid );
 918
 919                 Article::onArticleCreate( $this->mTitle );
 920                 RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary );
 921
 922                 if ($watchthis) {
 923                         if(!$this->mTitle->userIsWatching()) $this->watch();
 924                 } else {
 925                         if ( $this->mTitle->userIsWatching() ) {
 926                                 $this->unwatch();
 927                         }
 928                 }
 929
 930                 # The talk page isn't in the regular link tables, so we need to update manually:
 931                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 932                 $dbw->updateArray( 'cur', array('cur_touched' => $dbw->timestamp($now) ),
 933                         array(  'cur_namespace' => $talkns, 'cur_title' => $ttl ), $fname );
 934
 935                 # standard deferred updates
 936                 $this->editUpdates( $text );
 937
 938                 $this->showArticle( $text, wfMsg( 'newarticle' ) );
 939         }
 940
 941
 942         /**
 943          * Side effects: loads last edit
 944          */
 945         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = '') {
 946                 $this->loadLastEdit();
 947                 $oldtext = $this->getContent( true );
 948                 if ($section != '') {
 949                         if($section=='new') {
 950                                 if($summary) $subject="== {$summary} ==\n\n";
 951                                 $text=$oldtext."\n\n".$subject.$text;
 952                         } else {
 953
 954                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 955                                 # comments to be stripped as well)
 956                                 $striparray=array();
 957                                 $parser=new Parser();
 958                                 $parser->mOutputType=OT_WIKI;
 959                                 $oldtext=$parser->strip($oldtext, $striparray, true);
 960
 961                                 # now that we can be sure that no pseudo-sections are in the source,
 962                                 # split it up
 963                                 # Unfortunately we can't simply do a preg_replace because that might
 964                                 # replace the wrong section, so we have to use the section counter instead
 965                                 $secs=preg_split('/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 966                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 967                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 968
 969                                 # section 0 is top (intro) section
 970                                 if($section!=0) {
 971
 972                                         # headline of old section - we need to go through this section
 973                                         # to determine if there are any subsections that now need to
 974                                         # be erased, as the mother section has been replaced with
 975                                         # the text of all subsections.
 976                                         $headline=$secs[$section*2-1];
 977                                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 978                                         $hlevel=$matches[1];
 979
 980                                         # determine headline level for wikimarkup headings
 981                                         if(strpos($hlevel,'=')!==false) {
 982                                                 $hlevel=strlen($hlevel);
 983                                         }
 984
 985                                         $secs[$section*2-1]=''; // erase old headline
 986                                         $count=$section+1;
 987                                         $break=false;
 988                                         while(!empty($secs[$count*2-1]) && !$break) {
 989
 990                                                 $subheadline=$secs[$count*2-1];
 991                                                 preg_match(
 992                                                  '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
 993                                                 $subhlevel=$matches[1];
 994                                                 if(strpos($subhlevel,'=')!==false) {
 995                                                         $subhlevel=strlen($subhlevel);
 996                                                 }
 997                                                 if($subhlevel > $hlevel) {
 998                                                         // erase old subsections
 999                                                         $secs[$count*2-1]='';
1000                                                         $secs[$count*2]='';
1001                                                 }
1002                                                 if($subhlevel <= $hlevel) {
1003                                                         $break=true;
1004                                                 }
1005                                                 $count++;
1006
1007                                         }
1008
1009                                 }
1010                                 $text=join('',$secs);
1011                                 # reinsert the stuff that we stripped out earlier
1012                                 $text=$parser->unstrip($text,$striparray);
1013                                 $text=$parser->unstripNoWiki($text,$striparray);
1014                         }
1015
1016                 }
1017                 return $text;
1018         }
1019
1020         /**
1021          * Change an existing article. Puts the previous version back into the old table, updates RC
1022          * and all necessary caches, mostly via the deferred update array.
1023          *
1024          * It is possible to call this function from a command-line script, but note that you should
1025          * first set $wgUser, and clean up $wgDeferredUpdates after each edit.
1026          */
1027         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
1028                 global $wgOut, $wgUser;
1029                 global $wgDBtransactions, $wgMwRedir;
1030                 global $wgUseSquid, $wgInternalServer;
1031
1032                 $fname = 'Article::updateArticle';
1033                 $good = true;
1034
1035                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
1036                 if ( $minor && $wgUser->getID() ) { $me2 = 1; } else { $me2 = 0; }
1037                 if ( $this->isRedirect( $text ) ) {
1038                         # Remove all content but redirect
1039                         # This could be done by reconstructing the redirect from a title given by
1040                         # Title::newFromRedirect(), but then we wouldn't know which synonym the user
1041                         # wants to see
1042                         if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ')[^\\n]+)/i', $text, $m ) ) {
1043                                 $redir = 1;
1044                                 $text = $m[1] . "\n";
1045                         }
1046                 }
1047                 else { $redir = 0; }
1048
1049                 $text = $this->preSaveTransform( $text );
1050                 $dbw =& wfGetDB( DB_MASTER );
1051
1052                 # Update article, but only if changed.
1053
1054                 # It's important that we either rollback or complete, otherwise an attacker could
1055                 # overwrite cur entries by sending precisely timed user aborts. Random bored users
1056                 # could conceivably have the same effect, especially if cur is locked for long periods.
1057                 if( $wgDBtransactions ) {
1058                         $dbw->query( 'BEGIN', $fname );
1059                 } else {
1060                         $userAbort = ignore_user_abort( true );
1061                 }
1062
1063                 $oldtext = $this->getContent( true );
1064
1065                 if ( 0 != strcmp( $text, $oldtext ) ) {
1066                         $this->mCountAdjustment = $this->isCountable( $text )
1067                           - $this->isCountable( $oldtext );
1068                         $now = wfTimestampNow();
1069                         $won = wfInvertTimestamp( $now );
1070
1071                         # First update the cur row
1072                         $dbw->updateArray( 'cur',
1073                                 array( /* SET */
1074                                         'cur_text' => $text,
1075                                         'cur_comment' => $summary,
1076                                         'cur_minor_edit' => $me2,
1077                                         'cur_user' => $wgUser->getID(),
1078                                         'cur_timestamp' => $dbw->timestamp($now),
1079                                         'cur_user_text' => $wgUser->getName(),
1080                                         'cur_is_redirect' => $redir,
1081                                         'cur_is_new' => 0,
1082                                         'cur_touched' => $dbw->timestamp($now),
1083                                         'inverse_timestamp' => $won
1084                                 ), array( /* WHERE */
1085                                         'cur_id' => $this->getID(),
1086                                         'cur_timestamp' => $dbw->timestamp($this->getTimestamp())
1087                                 ), $fname
1088                         );
1089
1090                         if( $dbw->affectedRows() == 0 ) {
1091                                 /* Belated edit conflict! Run away!! */
1092                                 $good = false;
1093                         } else {
1094                                 # Now insert the previous revision into old
1095
1096                                 # This overwrites $oldtext if revision compression is on
1097                                 $flags = Article::compressRevisionText( $oldtext );
1098
1099                                 $dbw->insertArray( 'old',
1100                                         array(
1101                                                 'old_id' => $dbw->nextSequenceValue( 'old_old_id_seq' ),
1102                                                 'old_namespace' => $this->mTitle->getNamespace(),
1103                                                 'old_title' => $this->mTitle->getDBkey(),
1104                                                 'old_text' => $oldtext,
1105                                                 'old_comment' => $this->getComment(),
1106                                                 'old_user' => $this->getUser(),
1107                                                 'old_user_text' => $this->getUserText(),
1108                                                 'old_timestamp' => $dbw->timestamp($this->getTimestamp()),
1109                                                 'old_minor_edit' => $me1,
1110                                                 'inverse_timestamp' => wfInvertTimestamp( $this->getTimestamp() ),
1111                                                 'old_flags' => $flags,
1112                                         ), $fname
1113                                 );
1114
1115                                 $oldid = $dbw->insertId();
1116
1117                                 $bot = (int)($wgUser->isBot() || $forceBot);
1118                                 RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
1119                                         $oldid, $this->getTimestamp(), $bot );
1120                                 Article::onArticleEdit( $this->mTitle );
1121                         }
1122                 }
1123
1124                 if( $wgDBtransactions ) {
1125                         $dbw->query( 'COMMIT', $fname );
1126                 } else {
1127                         ignore_user_abort( $userAbort );
1128                 }
1129
1130                 if ( $good ) {
1131                 if ($watchthis) {
1132                         if (!$this->mTitle->userIsWatching()) $this->watch();
1133                 } else {
1134                         if ( $this->mTitle->userIsWatching() ) {
1135                                 $this->unwatch();
1136                         }
1137                 }
1138                 # standard deferred updates
1139                 $this->editUpdates( $text );
1140
1141
1142                 $urls = array();
1143                 # Template namespace
1144                 # Purge all articles linking here
1145                 if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
1146                         $titles = $this->mTitle->getLinksTo();
1147                         Title::touchArray( $titles );
1148                         if ( $wgUseSquid ) {
1149                                         foreach ( $titles as $title ) {
1150                                                 $urls[] = $title->getInternalURL();
1151                                         }
1152                         }
1153                 }
1154
1155                 # Squid updates
1156                 if ( $wgUseSquid ) {
1157                         $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
1158                         $u = new SquidUpdate( $urls );
1159                         $u->doUpdate();
1160                 }
1161
1162                 $this->showArticle( $text, wfMsg( 'updated' ), $sectionanchor );
1163                 }
1164                 return $good;
1165         }
1166
1167         /**
1168          * After we've either updated or inserted the article, update
1169          * the link tables and redirect to the new page.
1170          */
1171         function showArticle( $text, $subtitle , $sectionanchor = '' ) {
1172                 global $wgOut, $wgUser, $wgLinkCache;
1173
1174                 $wgLinkCache = new LinkCache();
1175                 # Select for update
1176                 $wgLinkCache->forUpdate( true );
1177
1178                 # Get old version of link table to allow incremental link updates
1179                 $wgLinkCache->preFill( $this->mTitle );
1180                 $wgLinkCache->clear();
1181
1182                 # Parse the text and replace links with placeholders
1183                 $wgOut = new OutputPage();
1184                 $wgOut->addWikiText( $text );
1185
1186                 # Look up the links in the DB and add them to the link cache
1187                 $wgOut->transformBuffer( RLH_FOR_UPDATE );
1188
1189                 if( $this->isRedirect( $text ) )
1190                         $r = 'redirect=no';
1191                 else
1192                         $r = '';
1193                 $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
1194         }
1195
1196         /**
1197          * Validate article
1198          * @todo document this function a bit more
1199          */
1200         function validate () {
1201                 global $wgOut, $wgUseValidation;
1202                 if( $wgUseValidation ) {
1203                         require_once ( 'SpecialValidate.php' ) ;
1204                         $wgOut->setPagetitle( wfMsg( 'validate' ) . ': ' . $this->mTitle->getPrefixedText() );
1205                         $wgOut->setRobotpolicy( 'noindex,follow' );
1206                         if( $this->mTitle->getNamespace() != 0 ) {
1207                                 $wgOut->addHTML( wfMsg( 'val_validate_article_namespace_only' ) );
1208                                 return;
1209                         }
1210                         $v = new Validation;
1211                         $v->validate_form( $this->mTitle->getDBkey() );
1212                 } else {
1213                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
1214                 }
1215         }
1216
1217         /**
1218          * Mark this particular edit as patrolled
1219          */
1220         function markpatrolled() {
1221                 global $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgUseRCPatrol, $wgUser;
1222                 $wgOut->setRobotpolicy( 'noindex,follow' );
1223
1224                 if ( !$wgUseRCPatrol )
1225                 {
1226                         $wgOut->errorpage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1227                         return;
1228                 }
1229                 if ( $wgUser->getID() == 0 )
1230                 {
1231                         $wgOut->loginToUse();
1232                         return;
1233                 }
1234                 if ( $wgOnlySysopsCanPatrol && !$wgUser->isSysop() )
1235                 {
1236                         $wgOut->sysopRequired();
1237                         return;
1238                 }
1239                 $rcid = $wgRequest->getVal( 'rcid' );
1240                 if ( !is_null ( $rcid ) )
1241                 {
1242                         RecentChange::markPatrolled( $rcid );
1243                         $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
1244                         $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
1245                         $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1246                 }
1247                 else
1248                 {
1249                         $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1250                 }
1251         }
1252
1253
1254         /**
1255          * Add or remove this page to my watchlist based on value of $add
1256          */
1257         function watch( $add = true ) {
1258                 global $wgUser, $wgOut, $wgLang;
1259                 global $wgDeferredUpdateList;
1260
1261                 if ( 0 == $wgUser->getID() ) {
1262                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1263                         return;
1264                 }
1265                 if ( wfReadOnly() ) {
1266                         $wgOut->readOnlyPage();
1267                         return;
1268                 }
1269                 if( $add )
1270                         $wgUser->addWatch( $this->mTitle );
1271                 else
1272                         $wgUser->removeWatch( $this->mTitle );
1273
1274                 $wgOut->setPagetitle( wfMsg( $add ? 'addedwatch' : 'removedwatch' ) );
1275                 $wgOut->setRobotpolicy( 'noindex,follow' );
1276
1277                 $sk = $wgUser->getSkin() ;
1278                 $link = $this->mTitle->getPrefixedText();
1279
1280                 if($add)
1281                         $text = wfMsg( 'addedwatchtext', $link );
1282                 else
1283                         $text = wfMsg( 'removedwatchtext', $link );
1284                 $wgOut->addWikiText( $text );
1285
1286                 $up = new UserUpdate();
1287                 array_push( $wgDeferredUpdateList, $up );
1288
1289                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1290         }
1291
1292         /**
1293          * Stop watching a page, it act just like a call to watch(false)
1294          */
1295         function unwatch() {
1296                 $this->watch( false );
1297         }
1298
1299         /**
1300          * protect a page
1301          */
1302         function protect( $limit = 'sysop' ) {
1303                 global $wgUser, $wgOut, $wgRequest;
1304
1305                 if ( ! $wgUser->isSysop() ) {
1306                         $wgOut->sysopRequired();
1307                         return;
1308                 }
1309                 if ( wfReadOnly() ) {
1310                         $wgOut->readOnlyPage();
1311                         return;
1312                 }
1313                 $id = $this->mTitle->getArticleID();
1314                 if ( 0 == $id ) {
1315                         $wgOut->fatalError( wfMsg( 'badarticleerror' ) );
1316                         return;
1317                 }
1318
1319                 $confirm = $wgRequest->getBool( 'wpConfirmProtect' ) && $wgRequest->wasPosted();
1320                 $reason = $wgRequest->getText( 'wpReasonProtect' );
1321
1322                 if ( $confirm ) {
1323                         $dbw =& wfGetDB( DB_MASTER );
1324                         $dbw->updateArray( 'cur',
1325                                 array( /* SET */
1326                                         'cur_touched' => $dbw->timestamp(),
1327                                         'cur_restrictions' => (string)$limit
1328                                 ), array( /* WHERE */
1329                                         'cur_id' => $id
1330                                 ), 'Article::protect'
1331                         );
1332
1333                         $log = new LogPage( 'protect' );
1334                         if ( $limit === '' ) {
1335                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1336                         } else {
1337                                         $log->addEntry( 'protect', $this->mTitle, $reason );
1338                         }
1339                         $wgOut->redirect( $this->mTitle->getFullURL() );
1340                         return;
1341                 } else {
1342                         $reason = htmlspecialchars( wfMsg( 'protectreason' ) );
1343                         return $this->confirmProtect( '', $reason, $limit );
1344                 }
1345         }
1346
1347         /**
1348          * Output protection confirmation dialog
1349          */
1350         function confirmProtect( $par, $reason, $limit = 'sysop'  ) {
1351                 global $wgOut;
1352
1353                 wfDebug( "Article::confirmProtect\n" );
1354
1355                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1356                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1357
1358                 $check = '';
1359                 $protcom = '';
1360
1361                 if ( $limit === '' ) {
1362                         $wgOut->setPageTitle( wfMsg( 'confirmunprotect' ) );
1363                         $wgOut->setSubtitle( wfMsg( 'unprotectsub', $sub ) );
1364                         $wgOut->addWikiText( wfMsg( 'confirmunprotecttext' ) );
1365                         $check = htmlspecialchars( wfMsg( 'confirmunprotect' ) );
1366                         $protcom = htmlspecialchars( wfMsg( 'unprotectcomment' ) );
1367                         $formaction = $this->mTitle->escapeLocalURL( 'action=unprotect' . $par );
1368                 } else {
1369                         $wgOut->setPageTitle( wfMsg( 'confirmprotect' ) );
1370                         $wgOut->setSubtitle( wfMsg( 'protectsub', $sub ) );
1371                         $wgOut->addWikiText( wfMsg( 'confirmprotecttext' ) );
1372                         $check = htmlspecialchars( wfMsg( 'confirmprotect' ) );
1373                         $protcom = htmlspecialchars( wfMsg( 'protectcomment' ) );
1374                         $formaction = $this->mTitle->escapeLocalURL( 'action=protect' . $par );
1375                 }
1376
1377                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1378
1379                 $wgOut->addHTML( "
1380 <form id='protectconfirm' method='post' action=\"{$formaction}\">
1381         <table border='0'>
1382                 <tr>
1383                         <td align='right'>
1384                                 <label for='wpReasonProtect'>{$protcom}:</label>
1385                         </td>
1386                         <td align='left'>
1387                                 <input type='text' size='60' name='wpReasonProtect' id='wpReasonProtect' value=\"" . htmlspecialchars( $reason ) . "\" />
1388                         </td>
1389                 </tr>
1390                 <tr>
1391                         <td>&nbsp;</td>
1392                 </tr>
1393                 <tr>
1394                         <td align='right'>
1395                                 <input type='checkbox' name='wpConfirmProtect' value='1' id='wpConfirmProtect' />
1396                         </td>
1397                         <td>
1398                                 <label for='wpConfirmProtect'>{$check}</label>
1399                         </td>
1400                 </tr>
1401                 <tr>
1402                         <td>&nbsp;</td>
1403                         <td>
1404                                 <input type='submit' name='wpConfirmProtectB' value=\"{$confirm}\" />
1405                         </td>
1406                 </tr>
1407         </table>
1408 </form>\n" );
1409
1410                 $wgOut->returnToMain( false );
1411         }
1412
1413         /**
1414          * Unprotect the pages
1415          */
1416         function unprotect() {
1417                 return $this->protect( '' );
1418         }
1419
1420         /*
1421          * UI entry point for page deletion
1422          */
1423         function delete() {
1424                 global $wgUser, $wgOut, $wgMessageCache, $wgRequest;
1425                 $fname = 'Article::delete';
1426                 $confirm = $wgRequest->getBool( 'wpConfirm' ) && $wgRequest->wasPosted();
1427                 $reason = $wgRequest->getText( 'wpReason' );
1428
1429                 # This code desperately needs to be totally rewritten
1430
1431                 # Check permissions
1432                 if ( ( ! $wgUser->isSysop() ) ) {
1433                         $wgOut->sysopRequired();
1434                         return;
1435                 }
1436                 if ( wfReadOnly() ) {
1437                         $wgOut->readOnlyPage();
1438                         return;
1439                 }
1440
1441                 # Better double-check that it hasn't been deleted yet!
1442                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1443                 if ( ( '' == trim( $this->mTitle->getText() ) )
1444                   or ( $this->mTitle->getArticleId() == 0 ) ) {
1445                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1446                         return;
1447                 }
1448
1449                 if ( $confirm ) {
1450                         $this->doDelete( $reason );
1451                         return;
1452                 }
1453
1454                 # determine whether this page has earlier revisions
1455                 # and insert a warning if it does
1456                 # we select the text because it might be useful below
1457                 $dbr =& $this->getDB();
1458                 $ns = $this->mTitle->getNamespace();
1459                 $title = $this->mTitle->getDBkey();
1460                 $old = $dbr->getArray( 'old',
1461                         array( 'old_text', 'old_flags' ),
1462                         array(
1463                                 'old_namespace' => $ns,
1464                                 'old_title' => $title,
1465                         ), $fname, $this->getSelectOptions( array( 'ORDER BY' => 'inverse_timestamp' ) )
1466                 );
1467
1468                 if( $old !== false && !$confirm ) {
1469                         $skin=$wgUser->getSkin();
1470                         $wgOut->addHTML('<b>'.wfMsg('historywarning'));
1471                         $wgOut->addHTML( $skin->historyLink() .'</b>');
1472                 }
1473
1474                 # Fetch cur_text
1475                 $s = $dbr->getArray( 'cur',
1476                         array( 'cur_text' ),
1477                         array(
1478                                 'cur_namespace' => $ns,
1479                                 'cur_title' => $title,
1480                         ), $fname, $this->getSelectOptions()
1481                 );
1482
1483                 if( $s !== false ) {
1484                         # if this is a mini-text, we can paste part of it into the deletion reason
1485
1486                         #if this is empty, an earlier revision may contain "useful" text
1487                         $blanked = false;
1488                         if($s->cur_text != '') {
1489                                 $text=$s->cur_text;
1490                         } else {
1491                                 if($old) {
1492                                         $text = Article::getRevisionText( $old );
1493                                         $blanked = true;
1494                                 }
1495
1496                         }
1497
1498                         $length=strlen($text);
1499
1500                         # this should not happen, since it is not possible to store an empty, new
1501                         # page. Let's insert a standard text in case it does, though
1502                         if($length == 0 && $reason === '') {
1503                                 $reason = wfMsg('exblank');
1504                         }
1505
1506                         if($length < 500 && $reason === '') {
1507
1508                                 # comment field=255, let's grep the first 150 to have some user
1509                                 # space left
1510                                 $text=substr($text,0,150);
1511                                 # let's strip out newlines and HTML tags
1512                                 $text=preg_replace('/\"/',"'",$text);
1513                                 $text=preg_replace('/\</','&lt;',$text);
1514                                 $text=preg_replace('/\>/','&gt;',$text);
1515                                 $text=preg_replace("/[\n\r]/",'',$text);
1516                                 if(!$blanked) {
1517                                         $reason=wfMsg('excontent'). " '".$text;
1518                                 } else {
1519                                         $reason=wfMsg('exbeforeblank') . " '".$text;
1520                                 }
1521                                 if($length>150) { $reason .= '...'; } # we've only pasted part of the text
1522                                 $reason.="'";
1523                         }
1524                 }
1525
1526                 return $this->confirmDelete( '', $reason );
1527         }
1528
1529         /**
1530          * Output deletion confirmation dialog
1531          */
1532         function confirmDelete( $par, $reason ) {
1533                 global $wgOut;
1534
1535                 wfDebug( "Article::confirmDelete\n" );
1536
1537                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1538                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1539                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1540                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1541
1542                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1543
1544                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1545                 $check = htmlspecialchars( wfMsg( 'confirmcheck' ) );
1546                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1547
1548                 $wgOut->addHTML( "
1549 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1550         <table border='0'>
1551                 <tr>
1552                         <td align='right'>
1553                                 <label for='wpReason'>{$delcom}:</label>
1554                         </td>
1555                         <td align='left'>
1556                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1557                         </td>
1558                 </tr>
1559                 <tr>
1560                         <td>&nbsp;</td>
1561                 </tr>
1562                 <tr>
1563                         <td align='right'>
1564                                 <input type='checkbox' name='wpConfirm' value='1' id='wpConfirm' />
1565                         </td>
1566                         <td>
1567                                 <label for='wpConfirm'>{$check}</label>
1568                         </td>
1569                 </tr>
1570                 <tr>
1571                         <td>&nbsp;</td>
1572                         <td>
1573                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1574                         </td>
1575                 </tr>
1576         </table>
1577 </form>\n" );
1578
1579                 $wgOut->returnToMain( false );
1580         }
1581
1582
1583         /**
1584          * Perform a deletion and output success or failure messages
1585          */
1586         function doDelete( $reason ) {
1587                 global $wgOut, $wgUser, $wgLang;
1588                 $fname = 'Article::doDelete';
1589                 wfDebug( $fname."\n" );
1590
1591                 if ( $this->doDeleteArticle( $reason ) ) {
1592                         $deleted = $this->mTitle->getPrefixedText();
1593
1594                         $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1595                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
1596
1597                         $sk = $wgUser->getSkin();
1598                         $loglink = $sk->makeKnownLink( $wgLang->getNsText( NS_PROJECT ) .
1599                           ':' . wfMsg( 'dellogpage' ), wfMsg( 'deletionlog' ) );
1600
1601                         $text = wfMsg( 'deletedtext', $deleted, $loglink );
1602
1603                         $wgOut->addHTML( '<p>' . $text . "</p>\n" );
1604                         $wgOut->returnToMain( false );
1605                 } else {
1606                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1607                 }
1608         }
1609
1610         /**
1611          * Back-end article deletion
1612          * Deletes the article with database consistency, writes logs, purges caches
1613          * Returns success
1614          */
1615         function doDeleteArticle( $reason ) {
1616                 global $wgUser, $wgLang;
1617                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
1618
1619                 $fname = 'Article::doDeleteArticle';
1620                 wfDebug( $fname."\n" );
1621
1622                 $dbw =& wfGetDB( DB_MASTER );
1623                 $ns = $this->mTitle->getNamespace();
1624                 $t = $this->mTitle->getDBkey();
1625                 $id = $this->mTitle->getArticleID();
1626
1627                 if ( $t == '' || $id == 0 ) {
1628                         return false;
1629                 }
1630
1631                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
1632                 array_push( $wgDeferredUpdateList, $u );
1633
1634                 $linksTo = $this->mTitle->getLinksTo();
1635
1636                 # Squid purging
1637                 if ( $wgUseSquid ) {
1638                         $urls = array(
1639                                 $this->mTitle->getInternalURL(),
1640                                 $this->mTitle->getInternalURL( 'history' )
1641                         );
1642                         foreach ( $linksTo as $linkTo ) {
1643                                 $urls[] = $linkTo->getInternalURL();
1644                         }
1645
1646                         $u = new SquidUpdate( $urls );
1647                         array_push( $wgDeferredUpdateList, $u );
1648
1649                 }
1650
1651                 # Client and file cache invalidation
1652                 Title::touchArray( $linksTo );
1653
1654                 # Move article and history to the "archive" table
1655                 $archiveTable = $dbw->tableName( 'archive' );
1656                 $oldTable = $dbw->tableName( 'old' );
1657                 $curTable = $dbw->tableName( 'cur' );
1658                 $recentchangesTable = $dbw->tableName( 'recentchanges' );
1659                 $linksTable = $dbw->tableName( 'links' );
1660                 $brokenlinksTable = $dbw->tableName( 'brokenlinks' );
1661
1662                 $dbw->insertSelect( 'archive', 'cur',
1663                         array(
1664                                 'ar_namespace' => 'cur_namespace',
1665                                 'ar_title' => 'cur_title',
1666                                 'ar_text' => 'cur_text',
1667                                 'ar_comment' => 'cur_comment',
1668                                 'ar_user' => 'cur_user',
1669                                 'ar_user_text' => 'cur_user_text',
1670                                 'ar_timestamp' => 'cur_timestamp',
1671                                 'ar_minor_edit' => 'cur_minor_edit',
1672                                 'ar_flags' => 0,
1673                         ), array(
1674                                 'cur_namespace' => $ns,
1675                                 'cur_title' => $t,
1676                         ), $fname
1677                 );
1678
1679                 $dbw->insertSelect( 'archive', 'old',
1680                         array(
1681                                 'ar_namespace' => 'old_namespace',
1682                                 'ar_title' => 'old_title',
1683                                 'ar_text' => 'old_text',
1684                                 'ar_comment' => 'old_comment',
1685                                 'ar_user' => 'old_user',
1686                                 'ar_user_text' => 'old_user_text',
1687                                 'ar_timestamp' => 'old_timestamp',
1688                                 'ar_minor_edit' => 'old_minor_edit',
1689                                 'ar_flags' => 'old_flags'
1690                         ), array(
1691                                 'old_namespace' => $ns,
1692                                 'old_title' => $t,
1693                         ), $fname
1694                 );
1695
1696                 # Now that it's safely backed up, delete it
1697
1698                 $dbw->delete( 'cur', array( 'cur_namespace' => $ns, 'cur_title' => $t ), $fname );
1699                 $dbw->delete( 'old', array( 'old_namespace' => $ns, 'old_title' => $t ), $fname );
1700                 $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), $fname );
1701
1702                 # Finally, clean up the link tables
1703                 $t = $this->mTitle->getPrefixedDBkey();
1704
1705                 Article::onArticleDelete( $this->mTitle );
1706
1707                 # Insert broken links
1708                 $brokenLinks = array();
1709                 foreach ( $linksTo as $titleObj ) {
1710                         # Get article ID. Efficient because it was loaded into the cache by getLinksTo().
1711                         $linkID = $titleObj->getArticleID();
1712                         $brokenLinks[] = array( 'bl_from' => $linkID, 'bl_to' => $t );
1713                 }
1714                 $dbw->insertArray( 'brokenlinks', $brokenLinks, $fname, 'IGNORE' );
1715
1716                 # Delete live links
1717                 $dbw->delete( 'links', array( 'l_to' => $id ) );
1718                 $dbw->delete( 'links', array( 'l_from' => $id ) );
1719                 $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
1720                 $dbw->delete( 'brokenlinks', array( 'bl_from' => $id ) );
1721                 $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
1722
1723                 # Log the deletion
1724                 $log = new LogPage( 'delete' );
1725                 $log->addEntry( 'delete', $this->mTitle, $reason );
1726
1727                 # Clear the cached article id so the interface doesn't act like we exist
1728                 $this->mTitle->resetArticleID( 0 );
1729                 $this->mTitle->mArticleID = 0;
1730                 return true;
1731         }
1732
1733         /**
1734          * Revert a modification
1735          */
1736         function rollback() {
1737                 global $wgUser, $wgLang, $wgOut, $wgRequest;
1738                 $fname = 'Article::rollback';
1739
1740                 if ( ! $wgUser->isSysop() ) {
1741                         $wgOut->sysopRequired();
1742                         return;
1743                 }
1744                 if ( wfReadOnly() ) {
1745                         $wgOut->readOnlyPage( $this->getContent( true ) );
1746                         return;
1747                 }
1748                 $dbw =& wfGetDB( DB_MASTER );
1749
1750                 # Enhanced rollback, marks edits rc_bot=1
1751                 $bot = $wgRequest->getBool( 'bot' );
1752
1753                 # Replace all this user's current edits with the next one down
1754                 $tt = $this->mTitle->getDBKey();
1755                 $n = $this->mTitle->getNamespace();
1756
1757                 # Get the last editor, lock table exclusively
1758                 $s = $dbw->getArray( 'cur',
1759                         array( 'cur_id','cur_user','cur_user_text','cur_comment' ),
1760                         array( 'cur_title' => $tt, 'cur_namespace' => $n ),
1761                         $fname, 'FOR UPDATE'
1762                 );
1763                 if( $s === false ) {
1764                         # Something wrong
1765                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
1766                         return;
1767                 }
1768                 $ut = $dbw->strencode( $s->cur_user_text );
1769                 $uid = $s->cur_user;
1770                 $pid = $s->cur_id;
1771
1772                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
1773                 if( $from != $s->cur_user_text ) {
1774                         $wgOut->setPageTitle(wfmsg('rollbackfailed'));
1775                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
1776                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
1777                                 htmlspecialchars( $from ),
1778                                 htmlspecialchars( $s->cur_user_text ) ) );
1779                         if($s->cur_comment != '') {
1780                                 $wgOut->addHTML(
1781                                         wfMsg('editcomment',
1782                                         htmlspecialchars( $s->cur_comment ) ) );
1783                         }
1784                         return;
1785                 }
1786
1787                 # Get the last edit not by this guy
1788                 $s = $dbw->getArray( 'old',
1789                         array( 'old_text','old_user','old_user_text','old_timestamp','old_flags' ),
1790                         array(
1791                                 'old_namespace' => $n,
1792                                 'old_title' => $tt,
1793                                 "old_user <> {$uid} OR old_user_text <> '{$ut}'"
1794                         ), $fname, array( 'FOR UPDATE', 'USE INDEX' => 'name_title_timestamp' )
1795                 );
1796                 if( $s === false ) {
1797                         # Something wrong
1798                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
1799                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
1800                         return;
1801                 }
1802
1803                 if ( $bot ) {
1804                         # Mark all reverted edits as bot
1805                         $dbw->updateArray( 'recentchanges',
1806                                 array( /* SET */
1807                                         'rc_bot' => 1
1808                                 ), array( /* WHERE */
1809                                         'rc_user' => $uid,
1810                                         "rc_timestamp > '{$s->old_timestamp}'",
1811                                 ), $fname
1812                         );
1813                 }
1814
1815                 # Save it!
1816                 $newcomment = wfMsg( 'revertpage', $s->old_user_text, $from );
1817                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1818                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1819                 $wgOut->addHTML( '<h2>' . $newcomment . "</h2>\n<hr />\n" );
1820                 $this->updateArticle( Article::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1821                 Article::onArticleEdit( $this->mTitle );
1822                 $wgOut->returnToMain( false );
1823         }
1824
1825
1826         /**
1827          * Do standard deferred updates after page view
1828          * @private
1829          */
1830         function viewUpdates() {
1831                 global $wgDeferredUpdateList;
1832                 if ( 0 != $this->getID() ) {
1833                         global $wgDisableCounters;
1834                         if( !$wgDisableCounters ) {
1835                                 Article::incViewCount( $this->getID() );
1836                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1837                                 array_push( $wgDeferredUpdateList, $u );
1838                         }
1839                 }
1840                 $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(),
1841                   $this->mTitle->getDBkey() );
1842                 array_push( $wgDeferredUpdateList, $u );
1843         }
1844
1845         /**
1846          * Do standard deferred updates after page edit.
1847          * Every 1000th edit, prune the recent changes table.
1848          * @private
1849          * @param string $text
1850          */
1851         function editUpdates( $text ) {
1852                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1853                 global $wgMessageCache;
1854
1855                 wfSeedRandom();
1856                 if ( 0 == mt_rand( 0, 999 ) ) {
1857                         $dbw =& wfGetDB( DB_MASTER );
1858                         $cutoff = $dbw->timestamp( time() - ( 7 * 86400 ) );
1859                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1860                         $dbw->query( $sql );
1861                 }
1862                 $id = $this->getID();
1863                 $title = $this->mTitle->getPrefixedDBkey();
1864                 $shortTitle = $this->mTitle->getDBkey();
1865
1866                 $adj = $this->mCountAdjustment;
1867
1868                 if ( 0 != $id ) {
1869                         $u = new LinksUpdate( $id, $title );
1870                         array_push( $wgDeferredUpdateList, $u );
1871                         $u = new SiteStatsUpdate( 0, 1, $adj );
1872                         array_push( $wgDeferredUpdateList, $u );
1873                         $u = new SearchUpdate( $id, $title, $text );
1874                         array_push( $wgDeferredUpdateList, $u );
1875
1876                         $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle );
1877                         array_push( $wgDeferredUpdateList, $u );
1878
1879                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1880                                 $wgMessageCache->replace( $shortTitle, $text );
1881                         }
1882                 }
1883         }
1884
1885         /**
1886          * @todo document this function
1887          * @private
1888          */
1889         function setOldSubtitle() {
1890                 global $wgLang, $wgOut, $wgUser;
1891
1892                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1893                 $sk = $wgUser->getSkin();
1894                 $lnk = $sk->makeKnownLinkObj ( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
1895                 $r = wfMsg( 'revisionasofwithlink', $td, $lnk );
1896                 $wgOut->setSubtitle( $r );
1897         }
1898
1899         /**
1900          * This function is called right before saving the wikitext,
1901          * so we can do things like signatures and links-in-context.
1902          *
1903          * @param string $text
1904          */
1905         function preSaveTransform( $text ) {
1906                 global $wgParser, $wgUser;
1907                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
1908         }
1909
1910         /* Caching functions */
1911
1912         /**
1913          * checkLastModified returns true if it has taken care of all
1914          * output to the client that is necessary for this request.
1915          * (that is, it has sent a cached version of the page)
1916          */
1917         function tryFileCache() {
1918                 static $called = false;
1919                 if( $called ) {
1920                         wfDebug( " tryFileCache() -- called twice!?\n" );
1921                         return;
1922                 }
1923                 $called = true;
1924                 if($this->isFileCacheable()) {
1925                         $touched = $this->mTouched;
1926                         if( $this->mTitle->getPrefixedDBkey() == wfMsg( 'mainpage' ) ) {
1927                                 # Expire the main page quicker
1928                                 $expire = wfUnix2Timestamp( time() - 3600 );
1929                                 $touched = max( $expire, $touched );
1930                         }
1931                         $cache = new CacheManager( $this->mTitle );
1932                         if($cache->isFileCacheGood( $touched )) {
1933                                 global $wgOut;
1934                                 wfDebug( " tryFileCache() - about to load\n" );
1935                                 $cache->loadFromFileCache();
1936                                 return true;
1937                         } else {
1938                                 wfDebug( " tryFileCache() - starting buffer\n" );
1939                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1940                         }
1941                 } else {
1942                         wfDebug( " tryFileCache() - not cacheable\n" );
1943                 }
1944         }
1945
1946         /**
1947          * Check if the page can be cached
1948          * @return bool
1949          */
1950         function isFileCacheable() {
1951                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
1952                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
1953
1954                 return $wgUseFileCache
1955                         and (!$wgShowIPinHeader)
1956                         and ($this->getID() != 0)
1957                         and ($wgUser->getId() == 0)
1958                         and (!$wgUser->getNewtalk())
1959                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
1960                         and (empty( $action ) || $action == 'view')
1961                         and (!isset($oldid))
1962                         and (!isset($diff))
1963                         and (!isset($redirect))
1964                         and (!isset($printable))
1965                         and (!$this->mRedirectedFrom);
1966         }
1967
1968         /**
1969          * Loads cur_touched and returns a value indicating if it should be used
1970          *
1971          */
1972         function checkTouched() {
1973                 $fname = 'Article::checkTouched';
1974                 $id = $this->getID();
1975                 $dbr =& $this->getDB();
1976                 $s = $dbr->getArray( 'cur', array( 'cur_touched', 'cur_is_redirect' ),
1977                         array( 'cur_id' => $id ), $fname, $this->getSelectOptions() );
1978                 if( $s !== false ) {
1979                         $this->mTouched = wfTimestamp(TS_MW,$s->cur_touched);
1980                         return !$s->cur_is_redirect;
1981                 } else {
1982                         return false;
1983                 }
1984         }
1985
1986         /**
1987          * Edit an article without doing all that other stuff
1988          *
1989          * @param string $text text submitted
1990          * @param string $comment comment submitted
1991          * @param integer $minor whereas it's a minor modification
1992          */
1993         function quickEdit( $text, $comment = '', $minor = 0 ) {
1994                 global $wgUser;
1995                 $fname = 'Article::quickEdit';
1996                 wfProfileIn( $fname );
1997
1998                 $dbw =& wfGetDB( DB_MASTER );
1999                 $ns = $this->mTitle->getNamespace();
2000                 $dbkey = $this->mTitle->getDBkey();
2001                 $encDbKey = $dbw->strencode( $dbkey );
2002                 $timestamp = wfTimestampNow();
2003
2004                 # Save to history
2005                 $dbw->insertSelect( 'old', 'cur',
2006                         array(
2007                                 'old_namespace' => 'cur_namespace',
2008                                 'old_title' => 'cur_title',
2009                                 'old_text' => 'cur_text',
2010                                 'old_comment' => 'cur_comment',
2011                                 'old_user' => 'cur_user',
2012                                 'old_user_text' => 'cur_user_text',
2013                                 'old_timestamp' => 'cur_timestamp',
2014                                 'inverse_timestamp' => '99999999999999-cur_timestamp',
2015                         ), array(
2016                                 'cur_namespace' => $ns,
2017                                 'cur_title' => $dbkey,
2018                         ), $fname
2019                 );
2020
2021                 # Use the affected row count to determine if the article is new
2022                 $numRows = $dbw->affectedRows();
2023
2024                 # Make an array of fields to be inserted
2025                 $fields = array(
2026                         'cur_text' => $text,
2027                         'cur_timestamp' => $timestamp,
2028                         'cur_user' => $wgUser->getID(),
2029                         'cur_user_text' => $wgUser->getName(),
2030                         'inverse_timestamp' => wfInvertTimestamp( $timestamp ),
2031                         'cur_comment' => $comment,
2032                         'cur_is_redirect' => $this->isRedirect( $text ) ? 1 : 0,
2033                         'cur_minor_edit' => intval($minor),
2034                         'cur_touched' => $dbw->timestamp($timestamp),
2035                 );
2036
2037                 if ( $numRows ) {
2038                         # Update article
2039                         $fields['cur_is_new'] = 0;
2040                         $dbw->updateArray( 'cur', $fields, array( 'cur_namespace' => $ns, 'cur_title' => $dbkey ), $fname );
2041                 } else {
2042                         # Insert new article
2043                         $fields['cur_is_new'] = 1;
2044                         $fields['cur_namespace'] = $ns;
2045                         $fields['cur_title'] = $dbkey;
2046                         $fields['cur_random'] = $rand = number_format( mt_rand() / mt_getrandmax(), 12, '.', '' );
2047                         $dbw->insertArray( 'cur', $fields, $fname );
2048                 }
2049                 wfProfileOut( $fname );
2050         }
2051
2052         /**
2053          * Used to increment the view counter
2054          *
2055          * @static
2056          * @param integer $id article id
2057          */
2058         function incViewCount( $id ) {
2059                 $id = intval( $id );
2060                 global $wgHitcounterUpdateFreq;
2061
2062                 $dbw =& wfGetDB( DB_MASTER );
2063                 $curTable = $dbw->tableName( 'cur' );
2064                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
2065                 $acchitsTable = $dbw->tableName( 'acchits' );
2066
2067                 if( $wgHitcounterUpdateFreq <= 1 ){ //
2068                         $dbw->query( "UPDATE $curTable SET cur_counter = cur_counter + 1 WHERE cur_id = $id" );
2069                         return;
2070                 }
2071
2072                 # Not important enough to warrant an error page in case of failure
2073                 $oldignore = $dbw->ignoreErrors( true );
2074
2075                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2076
2077                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2078                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2079                         # Most of the time (or on SQL errors), skip row count check
2080                         $dbw->ignoreErrors( $oldignore );
2081                         return;
2082                 }
2083
2084                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2085                 $row = $dbw->fetchObject( $res );
2086                 $rown = intval( $row->n );
2087                 if( $rown >= $wgHitcounterUpdateFreq ){
2088                         wfProfileIn( 'Article::incViewCount-collect' );
2089                         $old_user_abort = ignore_user_abort( true );
2090
2091                         $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2092                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable TYPE=HEAP ".
2093                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2094                                 'GROUP BY hc_id');
2095                         $dbw->query("DELETE FROM $hitcounterTable");
2096                         $dbw->query('UNLOCK TABLES');
2097                         $dbw->query("UPDATE $curTable,$acchitsTable SET cur_counter=cur_counter + hc_n ".
2098                                 'WHERE cur_id = hc_id');
2099                         $dbw->query("DROP TABLE $acchitsTable");
2100
2101                         ignore_user_abort( $old_user_abort );
2102                         wfProfileOut( 'Article::incViewCount-collect' );
2103                 }
2104                 $dbw->ignoreErrors( $oldignore );
2105         }
2106
2107         /**#@+
2108          * The onArticle*() functions are supposed to be a kind of hooks
2109          * which should be called whenever any of the specified actions
2110          * are done.
2111          *
2112          * This is a good place to put code to clear caches, for instance.
2113          *
2114          * This is called on page move and undelete, as well as edit
2115          * @static
2116          * @param $title_obj a title object
2117          */
2118
2119         function onArticleCreate($title_obj) {
2120                 global $wgUseSquid, $wgDeferredUpdateList;
2121
2122                 $titles = $title_obj->getBrokenLinksTo();
2123
2124                 # Purge squid
2125                 if ( $wgUseSquid ) {
2126                         $urls = $title_obj->getSquidURLs();
2127                         foreach ( $titles as $linkTitle ) {
2128                                 $urls[] = $linkTitle->getInternalURL();
2129                         }
2130                         $u = new SquidUpdate( $urls );
2131                         array_push( $wgDeferredUpdateList, $u );
2132                 }
2133
2134                 # Clear persistent link cache
2135                 LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
2136         }
2137
2138         function onArticleDelete($title_obj) {
2139                 LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
2140         }
2141         function onArticleEdit($title_obj) {
2142                 LinkCache::linksccClearPage( $title_obj->getArticleID() );
2143         }
2144         /**#@-*/
2145
2146         /**
2147          * Info about this page
2148          */
2149         function info() {
2150                 global $wgUser, $wgTitle, $wgOut, $wgLang, $wgAllowPageInfo;
2151                 $fname = 'Article::info';
2152
2153                 if ( !$wgAllowPageInfo ) {
2154                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
2155                         return;
2156                 }
2157
2158                 $dbr =& $this->getDB();
2159
2160                 $basenamespace = $wgTitle->getNamespace() & (~1);
2161                 $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace );
2162                 $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace );
2163                 $wl_clause  = array( 'wl_title' => $wgTitle->getDBkey(), 'wl_namespace' => $basenamespace );
2164                 $fullTitle = $wgTitle->makeName($basenamespace, $wgTitle->getDBKey());
2165                 $wgOut->setPagetitle(  $fullTitle );
2166                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
2167
2168                 # first, see if the page exists at all.
2169                 $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2170                 if ($exists < 1) {
2171                         $wgOut->addHTML( wfMsg('noarticletext') );
2172                 } else {
2173                         $numwatchers = $dbr->selectField( 'watchlist', 'COUNT(*)', $wl_clause, $fname,
2174                                 $this->getSelectOptions() );
2175                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $numwatchers) . '</li>' );
2176                         $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2177                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $old + 1) . '</li>');
2178
2179                         # to find number of distinct authors, we need to do some
2180                         # funny stuff because of the cur/old table split:
2181                         # - first, find the name of the 'cur' author
2182                         # - then, find the number of *other* authors in 'old'
2183
2184                         # find 'cur' author
2185                         $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2186                                 $this->getSelectOptions() );
2187
2188                         # find number of 'old' authors excluding 'cur' author
2189                         $authors = $dbr->selectField( 'old', 'COUNT(DISTINCT old_user_text)',
2190                                 $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ), $fname,
2191                                 $this->getSelectOptions() ) + 1;
2192
2193                         # now for the Talk page ...
2194                         $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace+1 );
2195                         $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace+1 );
2196
2197                         # does it exist?
2198                         $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2199
2200                         # number of edits
2201                         if ($exists > 0) {
2202                                 $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2203                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $old + 1) . '</li>');
2204                         }
2205                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $authors) . '</li>' );
2206
2207                         # number of authors
2208                         if ($exists > 0) {
2209                                 $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2210                                         $this->getSelectOptions() );
2211                                 $authors = $dbr->selectField( 'cur', 'COUNT(DISTINCT old_user_text)',
2212                                         $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ),
2213                                         $fname, $this->getSelectOptions() );
2214
2215                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $authors) . '</li></ul>' );
2216                         }
2217                 }
2218         }
2219 }
2220
2221 ?>