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_articleid','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->getArticleID() != $s->old_articleid ) {
 479                                 $oldTitle = Title::newFromID( $s->old_articleid );
 480                                 $this->mTitle = $oldTitle;
 481                                 $wgTitle = $oldTitle;
 482                         }
 483                         $this->mContent = Article::getRevisionText( $s );
 484                         $this->mUser = $s->old_user;
 485                         $this->mUserText = $s->old_user_text;
 486                         $this->mComment = $s->old_comment;
 487                         $this->mCounter = 0;
 488                         $this->mTimestamp = wfTimestamp(TS_MW,$s->old_timestamp);
 489                 }
 490                 $this->mContentLoaded = true;
 491                 return $this->mContent;
 492         }
 493
 494         /**
 495          * Gets the article text without using so many damn globals
 496          * Returns false on error
 497          *
 498          * @param integer $oldid
 499          */
 500         function getContentWithoutUsingSoManyDamnGlobals( $oldid = 0, $noredir = false ) {
 501                 if ( $this->mContentLoaded ) {
 502                         return $this->mContent;
 503                 }
 504                 $this->mContent = false;
 505
 506                 $fname = 'Article::getContentWithout';
 507                 $dbr =& $this->getDB();
 508
 509                 if ( ! $oldid ) {       # Retrieve current version
 510                         $id = $this->getID();
 511                         if ( 0 == $id ) {
 512                                 return false;
 513                         }
 514
 515                         $s = $dbr->selectRow( 'cur', $this->getCurContentFields(), array( 'cur_id' => $id ),
 516                                 $fname, $this->getSelectOptions() );
 517                         if ( $s === false ) {
 518                                 return false;
 519                         }
 520
 521                         # If we got a redirect, follow it (unless we've been told
 522                         # not to by either the function parameter or the query
 523                         if ( !$noredir ) {
 524                                 $rt = Title::newFromRedirect( $s->cur_text );
 525                                 if( $rt &&  $rt->getInterwiki() == '' && $rt->getNamespace() != NS_SPECIAL ) {
 526                                         $rid = $rt->getArticleID();
 527                                         if ( 0 != $rid ) {
 528                                                 $redirRow = $dbr->selectRow( 'cur', $this->getCurContentFields(),
 529                                                         array( 'cur_id' => $rid ), $fname, $this->getSelectOptions() );
 530
 531                                                 if ( $redirRow !== false ) {
 532                                                         $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 533                                                         $this->mTitle = $rt;
 534                                                         $s = $redirRow;
 535                                                 }
 536                                         }
 537                                 }
 538                         }
 539
 540                         $this->mContent = $s->cur_text;
 541                         $this->mUser = $s->cur_user;
 542                         $this->mUserText = $s->cur_user_text;
 543                         $this->mComment = $s->cur_comment;
 544                         $this->mCounter = $s->cur_counter;
 545                         $this->mTimestamp = wfTimestamp(TS_MW,$s->cur_timestamp);
 546                         $this->mTouched = wfTimestamp(TS_MW,$s->cur_touched);
 547                         $this->mTitle->mRestrictions = explode( ',', trim( $s->cur_restrictions ) );
 548                         $this->mTitle->mRestrictionsLoaded = true;
 549                 } else { # oldid set, retrieve historical version
 550                         $s = $dbr->selectRow( 'old', $this->getOldContentFields(), array( 'old_id' => $oldid ),
 551                                 $fname, $this->getSelectOptions() );
 552                         if ( $s === false ) {
 553                                 return false;
 554                         }
 555                         $this->mContent = Article::getRevisionText( $s );
 556                         $this->mUser = $s->old_user;
 557                         $this->mUserText = $s->old_user_text;
 558                         $this->mComment = $s->old_comment;
 559                         $this->mCounter = 0;
 560                         $this->mTimestamp = wfTimestamp(TS_MW,$s->old_timestamp);
 561                 }
 562                 $this->mContentLoaded = true;
 563                 return $this->mContent;
 564         }
 565
 566         /**
 567          * Read/write accessor to select FOR UPDATE
 568          */
 569         function forUpdate( $x = NULL ) {
 570                 return wfSetVar( $this->mForUpdate, $x );
 571         }
 572
 573         /**
 574          * Get the database which should be used for reads
 575          */
 576         function &getDB() {
 577                 if ( $this->mForUpdate ) {
 578                         return wfGetDB( DB_MASTER );
 579                 } else {
 580                         return wfGetDB( DB_SLAVE );
 581                 }
 582         }
 583
 584         /**
 585          * Get options for all SELECT statements
 586          * Can pass an option array, to which the class-wide options will be appended
 587          */
 588         function getSelectOptions( $options = '' ) {
 589                 if ( $this->mForUpdate ) {
 590                         if ( $options ) {
 591                                 $options[] = 'FOR UPDATE';
 592                         } else {
 593                                 $options = 'FOR UPDATE';
 594                         }
 595                 }
 596                 return $options;
 597         }
 598
 599         /**
 600          * Return the Article ID
 601          */
 602         function getID() {
 603                 if( $this->mTitle ) {
 604                         return $this->mTitle->getArticleID();
 605                 } else {
 606                         return 0;
 607                 }
 608         }
 609
 610         /**
 611          * Get the view count for this article
 612          */
 613         function getCount() {
 614                 if ( -1 == $this->mCounter ) {
 615                         $id = $this->getID();
 616                         $dbr =& $this->getDB();
 617                         $this->mCounter = $dbr->selectField( 'cur', 'cur_counter', 'cur_id='.$id,
 618                                 'Article::getCount', $this->getSelectOptions() );
 619                 }
 620                 return $this->mCounter;
 621         }
 622
 623         /**
 624          * Would the given text make this article a "good" article (i.e.,
 625          * suitable for including in the article count)?
 626          */
 627         function isCountable( $text ) {
 628                 global $wgUseCommaCount;
 629
 630                 if ( 0 != $this->mTitle->getNamespace() ) { return 0; }
 631                 if ( $this->isRedirect( $text ) ) { return 0; }
 632                 $token = ($wgUseCommaCount ? ',' : '[[' );
 633                 if ( false === strstr( $text, $token ) ) { return 0; }
 634                 return 1;
 635         }
 636
 637         /**
 638          * Tests if the article text represents a redirect
 639          */
 640         function isRedirect( $text = false ) {
 641                 if ( $text === false ) {
 642                         $this->loadContent();
 643                         $titleObj = Title::newFromRedirect( $this->mText );
 644                 } else {
 645                         $titleObj = Title::newFromRedirect( $text );
 646                 }
 647                 return $titleObj !== NULL;
 648         }
 649
 650         /**
 651          * Loads everything from cur except cur_text
 652          * This isn't necessary for all uses, so it's only done if needed.
 653          * @private
 654          */
 655         function loadLastEdit() {
 656                 global $wgOut;
 657                 if ( -1 != $this->mUser ) return;
 658
 659                 $fname = 'Article::loadLastEdit';
 660
 661                 $dbr =& $this->getDB();
 662                 $s = $dbr->getArray( 'cur',
 663                   array( 'cur_user','cur_user_text','cur_timestamp', 'cur_comment','cur_minor_edit' ),
 664                   array( 'cur_id' => $this->getID() ), $fname, $this->getSelectOptions() );
 665
 666                 if ( $s !== false ) {
 667                         $this->mUser = $s->cur_user;
 668                         $this->mUserText = $s->cur_user_text;
 669                         $this->mTimestamp = wfTimestamp(TS_MW,$s->cur_timestamp);
 670                         $this->mComment = $s->cur_comment;
 671                         $this->mMinorEdit = $s->cur_minor_edit;
 672                 }
 673         }
 674
 675         function getTimestamp() {
 676                 $this->loadLastEdit();
 677                 return $this->mTimestamp;
 678         }
 679
 680         function getUser() {
 681                 $this->loadLastEdit();
 682                 return $this->mUser;
 683         }
 684
 685         function getUserText() {
 686                 $this->loadLastEdit();
 687                 return $this->mUserText;
 688         }
 689
 690         function getComment() {
 691                 $this->loadLastEdit();
 692                 return $this->mComment;
 693         }
 694
 695         function getMinorEdit() {
 696                 $this->loadLastEdit();
 697                 return $this->mMinorEdit;
 698         }
 699
 700         function getContributors($limit = 0, $offset = 0) {
 701                 $fname = 'Article::getContributors';
 702
 703                 # XXX: this is expensive; cache this info somewhere.
 704
 705                 $title = $this->mTitle;
 706                 $contribs = array();
 707                 $dbr =& $this->getDB();
 708                 $oldTable = $dbr->tableName( 'old' );
 709                 $userTable = $dbr->tableName( 'user' );
 710                 $artid = $title->getArticleID();
 711                 $ns = $title->getNamespace();
 712                 $user = $this->getUser();
 713
 714                 $sql = "SELECT old_user, old_user_text, user_real_name, MAX(old_timestamp) as timestamp
 715                         FROM $oldTable LEFT JOIN $userTable ON old_user = user_id
 716                         WHERE old_articleid = $artid
 717                         AND old_user != $user
 718                         GROUP BY old_user, old_user_text, user_real_name
 719                         ORDER BY timestamp DESC";
 720
 721                 if ($limit > 0) { $sql .= ' LIMIT '.$limit; }
 722                 $sql .= ' '. $this->getSelectOptions();
 723
 724                 $res = $dbr->query($sql, $fname);
 725
 726                 while ( $line = $dbr->fetchObject( $res ) ) {
 727                         $contribs[] = array($line->old_user, $line->old_user_text, $line->user_real_name);
 728                 }
 729
 730                 $dbr->freeResult($res);
 731                 return $contribs;
 732         }
 733
 734         /**
 735          * This is the default action of the script: just view the page of
 736          * the given title.
 737         */
 738         function view() {
 739                 global $wgUser, $wgOut, $wgRequest, $wgOnlySysopsCanPatrol;
 740                 global $wgLinkCache, $IP, $wgEnableParserCache, $wgStylePath, $wgUseRCPatrol;
 741                 $sk = $wgUser->getSkin();
 742
 743                 $fname = 'Article::view';
 744                 wfProfileIn( $fname );
 745                 # Get variables from query string
 746                 $oldid = $wgRequest->getVal( 'oldid' );
 747                 $diff = $wgRequest->getVal( 'diff' );
 748                 $rcid = $wgRequest->getVal( 'rcid' );
 749
 750                 $wgOut->setArticleFlag( true );
 751                 $wgOut->setRobotpolicy( 'index,follow' );
 752                 # If we got diff and oldid in the query, we want to see a
 753                 # diff page instead of the article.
 754
 755                 if ( !is_null( $diff ) ) {
 756                         require_once( 'DifferenceEngine.php' );
 757                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 758                         $de = new DifferenceEngine( $oldid, $diff, $rcid );
 759                         $de->showDiffPage();
 760                         wfProfileOut( $fname );
 761                         if( $diff == 0 ) {
 762                                 # Run view updates for current revision only
 763                                 $this->viewUpdates();
 764                         }
 765                         return;
 766                 }
 767                 if ( empty( $oldid ) && $this->checkTouched() ) {
 768                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 769                                 return;
 770                         } else if ( $this->tryFileCache() ) {
 771                                 # tell wgOut that output is taken care of
 772                                 $wgOut->disable();
 773                                 $this->viewUpdates();
 774                                 return;
 775                         }
 776                 }
 777                 # Should the parser cache be used?
 778                 if ( $wgEnableParserCache && intval($wgUser->getOption( 'stubthreshold' )) == 0 && empty( $oldid ) ) {
 779                         $pcache = true;
 780                 } else {
 781                         $pcache = false;
 782                 }
 783
 784                 $outputDone = false;
 785                 if ( $pcache ) {
 786                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 787                                 $outputDone = true;
 788                         }
 789                 }
 790                 if ( !$outputDone ) {
 791                         $text = $this->getContent( false ); # May change mTitle by following a redirect
 792
 793                         # Another whitelist check in case oldid or redirects are altering the title
 794                         if ( !$this->mTitle->userCanRead() ) {
 795                                 $wgOut->loginToUse();
 796                                 $wgOut->output();
 797                                 exit;
 798                         }
 799
 800
 801                         # We're looking at an old revision
 802
 803                         if ( !empty( $oldid ) ) {
 804                                 $this->setOldSubtitle();
 805                                 $wgOut->setRobotpolicy( 'noindex,follow' );
 806                         }
 807                         if ( '' != $this->mRedirectedFrom ) {
 808                                 $sk = $wgUser->getSkin();
 809                                 $redir = $sk->makeKnownLink( $this->mRedirectedFrom, '',
 810                                   'redirect=no' );
 811                                 $s = wfMsg( 'redirectedfrom', $redir );
 812                                 $wgOut->setSubtitle( $s );
 813
 814                                 # Can't cache redirects
 815                                 $pcache = false;
 816                         }
 817
 818                         # wrap user css and user js in pre and don't parse
 819                         # XXX: use $this->mTitle->usCssJsSubpage() when php is fixed/ a workaround is found
 820                         if (
 821                                 $this->mTitle->getNamespace() == NS_USER &&
 822                                 preg_match('/\\/[\\w]+\\.(css|js)$/', $this->mTitle->getDBkey())
 823                         ) {
 824                                 $wgOut->addWikiText( wfMsg('clearyourcache'));
 825                                 $wgOut->addHTML( '<pre>'.htmlspecialchars($this->mContent)."\n</pre>" );
 826                         } else if ( $rt = Title::newFromRedirect( $text ) ) {
 827                                 # Display redirect
 828                                 $imageUrl = $wgStylePath.'/common/images/redirect.png';
 829                                 $targetUrl = $rt->escapeLocalURL();
 830                                 $titleText = htmlspecialchars( $rt->getPrefixedText() );
 831                                 $link = $sk->makeLinkObj( $rt );
 832                                 $wgOut->addHTML( '<img valign="center" src="'.$imageUrl.'">' .
 833                                   '<span class="redirectText">'.$link.'</span>' );
 834                         } else if ( $pcache ) {
 835                                 # Display content and save to parser cache
 836                                 $wgOut->addPrimaryWikiText( $text, $this );
 837                         } else {
 838                                 # Display content, don't attempt to save to parser cache
 839                                 $wgOut->addWikiText( $text );
 840                         }
 841                 }
 842                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 843                 # If we have been passed an &rcid= parameter, we want to give the user a
 844                 # chance to mark this new article as patrolled.
 845                 if ( $wgUseRCPatrol && !is_null ( $rcid ) && $rcid != 0 && $wgUser->getID() != 0 &&
 846                      ( $wgUser->isSysop() || !$wgOnlySysopsCanPatrol ) )
 847                 {
 848                         $wgOut->addHTML( wfMsg ( 'markaspatrolledlink',
 849                                 $sk->makeKnownLinkObj ( $this->mTitle, wfMsg ( 'markaspatrolledtext' ),
 850                                         'action=markpatrolled&rcid='.$rcid )
 851                          ) );
 852                 }
 853
 854                 # Put link titles into the link cache
 855                 $wgOut->transformBuffer();
 856
 857                 # Add link titles as META keywords
 858                 $wgOut->addMetaTags() ;
 859
 860                 $this->viewUpdates();
 861                 wfProfileOut( $fname );
 862         }
 863
 864         /**
 865          * Theoretically we could defer these whole insert and update
 866          * functions for after display, but that's taking a big leap
 867          * of faith, and we want to be able to report database
 868          * errors at some point.
 869          * @private
 870          */
 871         function insertNewArticle( $text, $summary, $isminor, $watchthis ) {
 872                 global $wgOut, $wgUser;
 873                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 874
 875                 $fname = 'Article::insertNewArticle';
 876
 877                 $this->mCountAdjustment = $this->isCountable( $text );
 878
 879                 $ns = $this->mTitle->getNamespace();
 880                 $ttl = $this->mTitle->getDBkey();
 881                 $text = $this->preSaveTransform( $text );
 882                 if ( $this->isRedirect( $text ) ) { $redir = 1; }
 883                 else { $redir = 0; }
 884
 885                 $now = wfTimestampNow();
 886                 $won = wfInvertTimestamp( $now );
 887                 wfSeedRandom();
 888                 $rand = number_format( mt_rand() / mt_getrandmax(), 12, '.', '' );
 889                 $dbw =& wfGetDB( DB_MASTER );
 890
 891                 $cur_id = $dbw->nextSequenceValue( 'cur_cur_id_seq' );
 892
 893                 $isminor = ( $isminor && $wgUser->getID() ) ? 1 : 0;
 894
 895                 $dbw->insertArray( 'cur', array(
 896                         'cur_id' => $cur_id,
 897                         'cur_namespace' => $ns,
 898                         'cur_title' => $ttl,
 899                         'cur_text' => $text,
 900                         'cur_comment' => $summary,
 901                         'cur_user' => $wgUser->getID(),
 902                         'cur_timestamp' => $dbw->timestamp($now),
 903                         'cur_minor_edit' => $isminor,
 904                         'cur_counter' => 0,
 905                         'cur_restrictions' => '',
 906                         'cur_user_text' => $wgUser->getName(),
 907                         'cur_is_redirect' => $redir,
 908                         'cur_is_new' => 1,
 909                         'cur_random' => $rand,
 910                         'cur_touched' => $dbw->timestamp($now),
 911                         'inverse_timestamp' => $won,
 912                 ), $fname );
 913
 914                 $newid = $dbw->insertId();
 915                 $this->mTitle->resetArticleID( $newid );
 916
 917                 Article::onArticleCreate( $this->mTitle );
 918                 RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary );
 919
 920                 if ($watchthis) {
 921                         if(!$this->mTitle->userIsWatching()) $this->watch();
 922                 } else {
 923                         if ( $this->mTitle->userIsWatching() ) {
 924                                 $this->unwatch();
 925                         }
 926                 }
 927
 928                 # The talk page isn't in the regular link tables, so we need to update manually:
 929                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 930                 $dbw->updateArray( 'cur', array('cur_touched' => $dbw->timestamp($now) ),
 931                         array(  'cur_namespace' => $talkns, 'cur_title' => $ttl ), $fname );
 932
 933                 # standard deferred updates
 934                 $this->editUpdates( $text );
 935
 936                 $this->showArticle( $text, wfMsg( 'newarticle' ) );
 937         }
 938
 939
 940         /**
 941          * Side effects: loads last edit if $edittime is NULL
 942          */
 943         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = '', $edittime = NULL) {
 944                 $fname = 'Article::getTextOfLastEditWithSectionReplacedOrAdded';
 945                 if(is_null($edittime)) {
 946                         $this->loadLastEdit();
 947                         $oldtext = $this->getContent( true );
 948                 } else {
 949                         $dbw =& wfGetDB( DB_MASTER );
 950                         $ns = $this->mTitle->getNamespace();
 951                         $title = $this->mTitle->getDBkey();
 952                         $aid = $this->mTitle->getArticleID();
 953                         $obj = $dbw->getArray( 'old',
 954                                 array( 'old_text','old_flags'),
 955                                 array( 'old_articleid' => $aid,
 956                                         'old_timestamp' => $dbw->timestamp($edittime)),
 957                                 $fname );
 958                         $oldtext = Article::getRevisionText( $obj );
 959                 }
 960                 if ($section != '') {
 961                         if($section=='new') {
 962                                 if($summary) $subject="== {$summary} ==\n\n";
 963                                 $text=$oldtext."\n\n".$subject.$text;
 964                         } else {
 965
 966                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 967                                 # comments to be stripped as well)
 968                                 $striparray=array();
 969                                 $parser=new Parser();
 970                                 $parser->mOutputType=OT_WIKI;
 971                                 $oldtext=$parser->strip($oldtext, $striparray, true);
 972
 973                                 # now that we can be sure that no pseudo-sections are in the source,
 974                                 # split it up
 975                                 # Unfortunately we can't simply do a preg_replace because that might
 976                                 # replace the wrong section, so we have to use the section counter instead
 977                                 $secs=preg_split('/(^=+.+?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)(?!\S)/mi',
 978                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 979                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 980
 981                                 # section 0 is top (intro) section
 982                                 if($section!=0) {
 983
 984                                         # headline of old section - we need to go through this section
 985                                         # to determine if there are any subsections that now need to
 986                                         # be erased, as the mother section has been replaced with
 987                                         # the text of all subsections.
 988                                         $headline=$secs[$section*2-1];
 989                                         preg_match( '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$headline,$matches);
 990                                         $hlevel=$matches[1];
 991
 992                                         # determine headline level for wikimarkup headings
 993                                         if(strpos($hlevel,'=')!==false) {
 994                                                 $hlevel=strlen($hlevel);
 995                                         }
 996
 997                                         $secs[$section*2-1]=''; // erase old headline
 998                                         $count=$section+1;
 999                                         $break=false;
1000                                         while(!empty($secs[$count*2-1]) && !$break) {
1001
1002                                                 $subheadline=$secs[$count*2-1];
1003                                                 preg_match(
1004                                                  '/^(=+).+?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>(?!\S)/mi',$subheadline,$matches);
1005                                                 $subhlevel=$matches[1];
1006                                                 if(strpos($subhlevel,'=')!==false) {
1007                                                         $subhlevel=strlen($subhlevel);
1008                                                 }
1009                                                 if($subhlevel > $hlevel) {
1010                                                         // erase old subsections
1011                                                         $secs[$count*2-1]='';
1012                                                         $secs[$count*2]='';
1013                                                 }
1014                                                 if($subhlevel <= $hlevel) {
1015                                                         $break=true;
1016                                                 }
1017                                                 $count++;
1018
1019                                         }
1020
1021                                 }
1022                                 $text=join('',$secs);
1023                                 # reinsert the stuff that we stripped out earlier
1024                                 $text=$parser->unstrip($text,$striparray);
1025                                 $text=$parser->unstripNoWiki($text,$striparray);
1026                         }
1027
1028                 }
1029                 return $text;
1030         }
1031
1032         /**
1033          * Change an existing article. Puts the previous version back into the old table, updates RC
1034          * and all necessary caches, mostly via the deferred update array.
1035          *
1036          * It is possible to call this function from a command-line script, but note that you should
1037          * first set $wgUser, and clean up $wgDeferredUpdates after each edit.
1038          */
1039         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
1040                 global $wgOut, $wgUser;
1041                 global $wgDBtransactions, $wgMwRedir;
1042                 global $wgUseSquid, $wgInternalServer;
1043
1044                 $fname = 'Article::updateArticle';
1045                 $good = true;
1046
1047                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
1048                 if ( $minor && $wgUser->getID() ) { $me2 = 1; } else { $me2 = 0; }
1049                 if ( $this->isRedirect( $text ) ) {
1050                         # Remove all content but redirect
1051                         # This could be done by reconstructing the redirect from a title given by
1052                         # Title::newFromRedirect(), but then we wouldn't know which synonym the user
1053                         # wants to see
1054                         if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ')[^\\n]+)/i', $text, $m ) ) {
1055                                 $redir = 1;
1056                                 $text = $m[1] . "\n";
1057                         }
1058                 }
1059                 else { $redir = 0; }
1060
1061                 $text = $this->preSaveTransform( $text );
1062                 $dbw =& wfGetDB( DB_MASTER );
1063
1064                 # Update article, but only if changed.
1065
1066                 # It's important that we either rollback or complete, otherwise an attacker could
1067                 # overwrite cur entries by sending precisely timed user aborts. Random bored users
1068                 # could conceivably have the same effect, especially if cur is locked for long periods.
1069                 if( $wgDBtransactions ) {
1070                         $dbw->query( 'BEGIN', $fname );
1071                 } else {
1072                         $userAbort = ignore_user_abort( true );
1073                 }
1074
1075                 $oldtext = $this->getContent( true );
1076
1077                 if ( 0 != strcmp( $text, $oldtext ) ) {
1078                         $this->mCountAdjustment = $this->isCountable( $text )
1079                           - $this->isCountable( $oldtext );
1080                         $now = wfTimestampNow();
1081                         $won = wfInvertTimestamp( $now );
1082
1083                         # First update the cur row
1084                         $dbw->updateArray( 'cur',
1085                                 array( /* SET */
1086                                         'cur_text' => $text,
1087                                         'cur_comment' => $summary,
1088                                         'cur_minor_edit' => $me2,
1089                                         'cur_user' => $wgUser->getID(),
1090                                         'cur_timestamp' => $dbw->timestamp($now),
1091                                         'cur_user_text' => $wgUser->getName(),
1092                                         'cur_is_redirect' => $redir,
1093                                         'cur_is_new' => 0,
1094                                         'cur_touched' => $dbw->timestamp($now),
1095                                         'inverse_timestamp' => $won
1096                                 ), array( /* WHERE */
1097                                         'cur_id' => $this->getID(),
1098                                         'cur_timestamp' => $dbw->timestamp($this->getTimestamp())
1099                                 ), $fname
1100                         );
1101
1102                         if( $dbw->affectedRows() == 0 ) {
1103                                 /* Belated edit conflict! Run away!! */
1104                                 $good = false;
1105                         } else {
1106                                 # Now insert the previous revision into old
1107
1108                                 # This overwrites $oldtext if revision compression is on
1109                                 $flags = Article::compressRevisionText( $oldtext );
1110
1111                                 $dbw->insertArray( 'old',
1112                                         array(
1113                                                 'old_id' => $dbw->nextSequenceValue( 'old_old_id_seq' ),
1114                                                 'old_articleid' => $this->mTitle->getArticleID(),
1115                                                 'old_text' => $oldtext,
1116                                                 'old_comment' => $this->getComment(),
1117                                                 'old_user' => $this->getUser(),
1118                                                 'old_user_text' => $this->getUserText(),
1119                                                 'old_timestamp' => $dbw->timestamp($this->getTimestamp()),
1120                                                 'old_minor_edit' => $me1,
1121                                                 'inverse_timestamp' => wfInvertTimestamp( $this->getTimestamp() ),
1122                                                 'old_flags' => $flags,
1123                                         ), $fname
1124                                 );
1125
1126                                 $oldid = $dbw->insertId();
1127
1128                                 $bot = (int)($wgUser->isBot() || $forceBot);
1129                                 RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
1130                                         $oldid, $this->getTimestamp(), $bot );
1131                                 Article::onArticleEdit( $this->mTitle );
1132                         }
1133                 }
1134
1135                 if( $wgDBtransactions ) {
1136                         $dbw->query( 'COMMIT', $fname );
1137                 } else {
1138                         ignore_user_abort( $userAbort );
1139                 }
1140
1141                 if ( $good ) {
1142                 if ($watchthis) {
1143                         if (!$this->mTitle->userIsWatching()) $this->watch();
1144                 } else {
1145                         if ( $this->mTitle->userIsWatching() ) {
1146                                 $this->unwatch();
1147                         }
1148                 }
1149                 # standard deferred updates
1150                 $this->editUpdates( $text );
1151
1152
1153                 $urls = array();
1154                 # Template namespace
1155                 # Purge all articles linking here
1156                 if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
1157                         $titles = $this->mTitle->getLinksTo();
1158                         Title::touchArray( $titles );
1159                         if ( $wgUseSquid ) {
1160                                         foreach ( $titles as $title ) {
1161                                                 $urls[] = $title->getInternalURL();
1162                                         }
1163                         }
1164                 }
1165
1166                 # Squid updates
1167                 if ( $wgUseSquid ) {
1168                         $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
1169                         $u = new SquidUpdate( $urls );
1170                         $u->doUpdate();
1171                 }
1172
1173                 $this->showArticle( $text, wfMsg( 'updated' ), $sectionanchor );
1174                 }
1175                 return $good;
1176         }
1177
1178         /**
1179          * After we've either updated or inserted the article, update
1180          * the link tables and redirect to the new page.
1181          */
1182         function showArticle( $text, $subtitle , $sectionanchor = '' ) {
1183                 global $wgOut, $wgUser, $wgLinkCache;
1184
1185                 $wgLinkCache = new LinkCache();
1186                 # Select for update
1187                 $wgLinkCache->forUpdate( true );
1188
1189                 # Get old version of link table to allow incremental link updates
1190                 $wgLinkCache->preFill( $this->mTitle );
1191                 $wgLinkCache->clear();
1192
1193                 # Parse the text and replace links with placeholders
1194                 $wgOut = new OutputPage();
1195                 $wgOut->addWikiText( $text );
1196
1197                 # Look up the links in the DB and add them to the link cache
1198                 $wgOut->transformBuffer( RLH_FOR_UPDATE );
1199
1200                 if( $this->isRedirect( $text ) )
1201                         $r = 'redirect=no';
1202                 else
1203                         $r = '';
1204                 $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
1205         }
1206
1207         /**
1208          * Validate article
1209          * @todo document this function a bit more
1210          */
1211         function validate () {
1212                 global $wgOut, $wgUseValidation;
1213                 if( $wgUseValidation ) {
1214                         require_once ( 'SpecialValidate.php' ) ;
1215                         $wgOut->setPagetitle( wfMsg( 'validate' ) . ': ' . $this->mTitle->getPrefixedText() );
1216                         $wgOut->setRobotpolicy( 'noindex,follow' );
1217                         if( $this->mTitle->getNamespace() != 0 ) {
1218                                 $wgOut->addHTML( wfMsg( 'val_validate_article_namespace_only' ) );
1219                                 return;
1220                         }
1221                         $v = new Validation;
1222                         $v->validate_form( $this->mTitle->getDBkey() );
1223                 } else {
1224                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
1225                 }
1226         }
1227
1228         /**
1229          * Mark this particular edit as patrolled
1230          */
1231         function markpatrolled() {
1232                 global $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgUseRCPatrol, $wgUser;
1233                 $wgOut->setRobotpolicy( 'noindex,follow' );
1234
1235                 if ( !$wgUseRCPatrol )
1236                 {
1237                         $wgOut->errorpage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1238                         return;
1239                 }
1240                 if ( $wgUser->getID() == 0 )
1241                 {
1242                         $wgOut->loginToUse();
1243                         return;
1244                 }
1245                 if ( $wgOnlySysopsCanPatrol && !$wgUser->isSysop() )
1246                 {
1247                         $wgOut->sysopRequired();
1248                         return;
1249                 }
1250                 $rcid = $wgRequest->getVal( 'rcid' );
1251                 if ( !is_null ( $rcid ) )
1252                 {
1253                         RecentChange::markPatrolled( $rcid );
1254                         $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
1255                         $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
1256                         $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1257                 }
1258                 else
1259                 {
1260                         $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1261                 }
1262         }
1263
1264
1265         /**
1266          * Add or remove this page to my watchlist based on value of $add
1267          */
1268         function watch( $add = true ) {
1269                 global $wgUser, $wgOut;
1270                 global $wgDeferredUpdateList;
1271
1272                 if ( 0 == $wgUser->getID() ) {
1273                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1274                         return;
1275                 }
1276                 if ( wfReadOnly() ) {
1277                         $wgOut->readOnlyPage();
1278                         return;
1279                 }
1280                 if( $add )
1281                         $wgUser->addWatch( $this->mTitle );
1282                 else
1283                         $wgUser->removeWatch( $this->mTitle );
1284
1285                 $wgOut->setPagetitle( wfMsg( $add ? 'addedwatch' : 'removedwatch' ) );
1286                 $wgOut->setRobotpolicy( 'noindex,follow' );
1287
1288                 $sk = $wgUser->getSkin() ;
1289                 $link = $this->mTitle->getPrefixedText();
1290
1291                 if($add)
1292                         $text = wfMsg( 'addedwatchtext', $link );
1293                 else
1294                         $text = wfMsg( 'removedwatchtext', $link );
1295                 $wgOut->addWikiText( $text );
1296
1297                 $up = new UserUpdate();
1298                 array_push( $wgDeferredUpdateList, $up );
1299
1300                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1301         }
1302
1303         /**
1304          * Stop watching a page, it act just like a call to watch(false)
1305          */
1306         function unwatch() {
1307                 $this->watch( false );
1308         }
1309
1310         /**
1311          * protect a page
1312          */
1313         function protect( $limit = 'sysop' ) {
1314                 global $wgUser, $wgOut, $wgRequest;
1315
1316                 if ( ! $wgUser->isSysop() ) {
1317                         $wgOut->sysopRequired();
1318                         return;
1319                 }
1320                 if ( wfReadOnly() ) {
1321                         $wgOut->readOnlyPage();
1322                         return;
1323                 }
1324                 $id = $this->mTitle->getArticleID();
1325                 if ( 0 == $id ) {
1326                         $wgOut->fatalError( wfMsg( 'badarticleerror' ) );
1327                         return;
1328                 }
1329
1330                 $confirm = $wgRequest->getBool( 'wpConfirmProtect' ) && $wgRequest->wasPosted();
1331                 $reason = $wgRequest->getText( 'wpReasonProtect' );
1332
1333                 if ( $confirm ) {
1334                         $dbw =& wfGetDB( DB_MASTER );
1335                         $dbw->updateArray( 'cur',
1336                                 array( /* SET */
1337                                         'cur_touched' => $dbw->timestamp(),
1338                                         'cur_restrictions' => (string)$limit
1339                                 ), array( /* WHERE */
1340                                         'cur_id' => $id
1341                                 ), 'Article::protect'
1342                         );
1343
1344                         $log = new LogPage( 'protect' );
1345                         if ( $limit === '' ) {
1346                                         $log->addEntry( 'unprotect', $this->mTitle, $reason );
1347                         } else {
1348                                         $log->addEntry( 'protect', $this->mTitle, $reason );
1349                         }
1350                         $wgOut->redirect( $this->mTitle->getFullURL() );
1351                         return;
1352                 } else {
1353                         $reason = htmlspecialchars( wfMsg( 'protectreason' ) );
1354                         return $this->confirmProtect( '', $reason, $limit );
1355                 }
1356         }
1357
1358         /**
1359          * Output protection confirmation dialog
1360          */
1361         function confirmProtect( $par, $reason, $limit = 'sysop'  ) {
1362                 global $wgOut;
1363
1364                 wfDebug( "Article::confirmProtect\n" );
1365
1366                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1367                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1368
1369                 $check = '';
1370                 $protcom = '';
1371
1372                 if ( $limit === '' ) {
1373                         $wgOut->setPageTitle( wfMsg( 'confirmunprotect' ) );
1374                         $wgOut->setSubtitle( wfMsg( 'unprotectsub', $sub ) );
1375                         $wgOut->addWikiText( wfMsg( 'confirmunprotecttext' ) );
1376                         $check = htmlspecialchars( wfMsg( 'confirmunprotect' ) );
1377                         $protcom = htmlspecialchars( wfMsg( 'unprotectcomment' ) );
1378                         $formaction = $this->mTitle->escapeLocalURL( 'action=unprotect' . $par );
1379                 } else {
1380                         $wgOut->setPageTitle( wfMsg( 'confirmprotect' ) );
1381                         $wgOut->setSubtitle( wfMsg( 'protectsub', $sub ) );
1382                         $wgOut->addWikiText( wfMsg( 'confirmprotecttext' ) );
1383                         $check = htmlspecialchars( wfMsg( 'confirmprotect' ) );
1384                         $protcom = htmlspecialchars( wfMsg( 'protectcomment' ) );
1385                         $formaction = $this->mTitle->escapeLocalURL( 'action=protect' . $par );
1386                 }
1387
1388                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1389
1390                 $wgOut->addHTML( "
1391 <form id='protectconfirm' method='post' action=\"{$formaction}\">
1392         <table border='0'>
1393                 <tr>
1394                         <td align='right'>
1395                                 <label for='wpReasonProtect'>{$protcom}:</label>
1396                         </td>
1397                         <td align='left'>
1398                                 <input type='text' size='60' name='wpReasonProtect' id='wpReasonProtect' value=\"" . htmlspecialchars( $reason ) . "\" />
1399                         </td>
1400                 </tr>
1401                 <tr>
1402                         <td>&nbsp;</td>
1403                 </tr>
1404                 <tr>
1405                         <td align='right'>
1406                                 <input type='checkbox' name='wpConfirmProtect' value='1' id='wpConfirmProtect' />
1407                         </td>
1408                         <td>
1409                                 <label for='wpConfirmProtect'>{$check}</label>
1410                         </td>
1411                 </tr>
1412                 <tr>
1413                         <td>&nbsp;</td>
1414                         <td>
1415                                 <input type='submit' name='wpConfirmProtectB' value=\"{$confirm}\" />
1416                         </td>
1417                 </tr>
1418         </table>
1419 </form>\n" );
1420
1421                 $wgOut->returnToMain( false );
1422         }
1423
1424         /**
1425          * Unprotect the pages
1426          */
1427         function unprotect() {
1428                 return $this->protect( '' );
1429         }
1430
1431         /*
1432          * UI entry point for page deletion
1433          */
1434         function delete() {
1435                 global $wgUser, $wgOut, $wgMessageCache, $wgRequest;
1436                 $fname = 'Article::delete';
1437                 $confirm = $wgRequest->getBool( 'wpConfirm' ) && $wgRequest->wasPosted();
1438                 $reason = $wgRequest->getText( 'wpReason' );
1439
1440                 # This code desperately needs to be totally rewritten
1441
1442                 # Check permissions
1443                 if ( ( ! $wgUser->isSysop() ) ) {
1444                         $wgOut->sysopRequired();
1445                         return;
1446                 }
1447                 if ( wfReadOnly() ) {
1448                         $wgOut->readOnlyPage();
1449                         return;
1450                 }
1451
1452                 # Better double-check that it hasn't been deleted yet!
1453                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1454                 if ( ( '' == trim( $this->mTitle->getText() ) )
1455                   or ( $this->mTitle->getArticleId() == 0 ) ) {
1456                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1457                         return;
1458                 }
1459
1460                 if ( $confirm ) {
1461                         $this->doDelete( $reason );
1462                         return;
1463                 }
1464
1465                 # determine whether this page has earlier revisions
1466                 # and insert a warning if it does
1467                 # we select the text because it might be useful below
1468                 $dbr =& $this->getDB();
1469                 $ns = $this->mTitle->getNamespace();
1470                 $title = $this->mTitle->getDBkey();
1471                 $artid = $this->mTitle->getArticleID();
1472                 $old = $dbr->getArray( 'old',
1473                         array( 'old_text', 'old_flags' ),
1474                         array( 'old_articleid' => $artid ),
1475                         $fname, $this->getSelectOptions( array( 'ORDER BY' => 'inverse_timestamp' ) )
1476                 );
1477
1478                 if( $old !== false && !$confirm ) {
1479                         $skin=$wgUser->getSkin();
1480                         $wgOut->addHTML('<b>'.wfMsg('historywarning'));
1481                         $wgOut->addHTML( $skin->historyLink() .'</b>');
1482                 }
1483
1484                 # Fetch cur_text
1485                 $s = $dbr->getArray( 'cur',
1486                         array( 'cur_text' ),
1487                         array(
1488                                 'cur_namespace' => $ns,
1489                                 'cur_title' => $title,
1490                         ), $fname, $this->getSelectOptions()
1491                 );
1492
1493                 if( $s !== false ) {
1494                         # if this is a mini-text, we can paste part of it into the deletion reason
1495
1496                         #if this is empty, an earlier revision may contain "useful" text
1497                         $blanked = false;
1498                         if($s->cur_text != '') {
1499                                 $text=$s->cur_text;
1500                         } else {
1501                                 if($old) {
1502                                         $text = Article::getRevisionText( $old );
1503                                         $blanked = true;
1504                                 }
1505
1506                         }
1507
1508                         $length=strlen($text);
1509
1510                         # this should not happen, since it is not possible to store an empty, new
1511                         # page. Let's insert a standard text in case it does, though
1512                         if($length == 0 && $reason === '') {
1513                                 $reason = wfMsg('exblank');
1514                         }
1515
1516                         if($length < 500 && $reason === '') {
1517
1518                                 # comment field=255, let's grep the first 150 to have some user
1519                                 # space left
1520                                 $text=substr($text,0,150);
1521                                 # let's strip out newlines and HTML tags
1522                                 $text=preg_replace('/\"/',"'",$text);
1523                                 $text=preg_replace('/\</','&lt;',$text);
1524                                 $text=preg_replace('/\>/','&gt;',$text);
1525                                 $text=preg_replace("/[\n\r]/",'',$text);
1526                                 if(!$blanked) {
1527                                         $reason=wfMsg('excontent'). " '".$text;
1528                                 } else {
1529                                         $reason=wfMsg('exbeforeblank') . " '".$text;
1530                                 }
1531                                 if($length>150) { $reason .= '...'; } # we've only pasted part of the text
1532                                 $reason.="'";
1533                         }
1534                 }
1535
1536                 return $this->confirmDelete( '', $reason );
1537         }
1538
1539         /**
1540          * Output deletion confirmation dialog
1541          */
1542         function confirmDelete( $par, $reason ) {
1543                 global $wgOut;
1544
1545                 wfDebug( "Article::confirmDelete\n" );
1546
1547                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1548                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1549                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1550                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1551
1552                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1553
1554                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1555                 $check = htmlspecialchars( wfMsg( 'confirmcheck' ) );
1556                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1557
1558                 $wgOut->addHTML( "
1559 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1560         <table border='0'>
1561                 <tr>
1562                         <td align='right'>
1563                                 <label for='wpReason'>{$delcom}:</label>
1564                         </td>
1565                         <td align='left'>
1566                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1567                         </td>
1568                 </tr>
1569                 <tr>
1570                         <td>&nbsp;</td>
1571                 </tr>
1572                 <tr>
1573                         <td align='right'>
1574                                 <input type='checkbox' name='wpConfirm' value='1' id='wpConfirm' />
1575                         </td>
1576                         <td>
1577                                 <label for='wpConfirm'>{$check}</label>
1578                         </td>
1579                 </tr>
1580                 <tr>
1581                         <td>&nbsp;</td>
1582                         <td>
1583                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1584                         </td>
1585                 </tr>
1586         </table>
1587 </form>\n" );
1588
1589                 $wgOut->returnToMain( false );
1590         }
1591
1592
1593         /**
1594          * Perform a deletion and output success or failure messages
1595          */
1596         function doDelete( $reason ) {
1597                 global $wgOut, $wgUser, $wgContLang;
1598                 $fname = 'Article::doDelete';
1599                 wfDebug( $fname."\n" );
1600
1601                 if ( $this->doDeleteArticle( $reason ) ) {
1602                         $deleted = $this->mTitle->getPrefixedText();
1603
1604                         $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1605                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
1606
1607                         $sk = $wgUser->getSkin();
1608                         $loglink = $sk->makeKnownLink( $wgContLang->getNsText( NS_PROJECT ) .
1609                           ':' . wfMsgForContent( 'dellogpage' ), wfMsg( 'deletionlog' ) );
1610
1611                         $text = wfMsg( 'deletedtext', $deleted, $loglink );
1612
1613                         $wgOut->addHTML( '<p>' . $text . "</p>\n" );
1614                         $wgOut->returnToMain( false );
1615                 } else {
1616                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1617                 }
1618         }
1619
1620         /**
1621          * Back-end article deletion
1622          * Deletes the article with database consistency, writes logs, purges caches
1623          * Returns success
1624          */
1625         function doDeleteArticle( $reason ) {
1626                 global $wgUser;
1627                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
1628
1629                 $fname = 'Article::doDeleteArticle';
1630                 wfDebug( $fname."\n" );
1631
1632                 $dbw =& wfGetDB( DB_MASTER );
1633                 $ns = $this->mTitle->getNamespace();
1634                 $t = $this->mTitle->getDBkey();
1635                 $id = $this->mTitle->getArticleID();
1636
1637                 if ( $t == '' || $id == 0 ) {
1638                         return false;
1639                 }
1640
1641                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
1642                 array_push( $wgDeferredUpdateList, $u );
1643
1644                 $linksTo = $this->mTitle->getLinksTo();
1645
1646                 # Squid purging
1647                 if ( $wgUseSquid ) {
1648                         $urls = array(
1649                                 $this->mTitle->getInternalURL(),
1650                                 $this->mTitle->getInternalURL( 'history' )
1651                         );
1652                         foreach ( $linksTo as $linkTo ) {
1653                                 $urls[] = $linkTo->getInternalURL();
1654                         }
1655
1656                         $u = new SquidUpdate( $urls );
1657                         array_push( $wgDeferredUpdateList, $u );
1658
1659                 }
1660
1661                 # Client and file cache invalidation
1662                 Title::touchArray( $linksTo );
1663
1664                 # Move article and history to the "archive" table
1665                 $archiveTable = $dbw->tableName( 'archive' );
1666                 $oldTable = $dbw->tableName( 'old' );
1667                 $curTable = $dbw->tableName( 'cur' );
1668                 $recentchangesTable = $dbw->tableName( 'recentchanges' );
1669                 $linksTable = $dbw->tableName( 'links' );
1670                 $brokenlinksTable = $dbw->tableName( 'brokenlinks' );
1671                 $artid = $this->mTitle->getArticleID();
1672
1673                 $dbw->insertSelect( 'archive', 'cur',
1674                         array(
1675                                 'ar_namespace' => 'cur_namespace',
1676                                 'ar_title' => 'cur_title',
1677                                 'ar_text' => 'cur_text',
1678                                 'ar_comment' => 'cur_comment',
1679                                 'ar_user' => 'cur_user',
1680                                 'ar_user_text' => 'cur_user_text',
1681                                 'ar_timestamp' => 'cur_timestamp',
1682                                 'ar_minor_edit' => 'cur_minor_edit',
1683                                 'ar_flags' => 0,
1684                         ), array(
1685                                 'cur_namespace' => $ns,
1686                                 'cur_title' => $t,
1687                         ), $fname
1688                 );
1689
1690                 $dbw->insertSelect( 'archive', 'cur,old',
1691                         array(
1692                                 'ar_namespace' => 'cur_namespace',
1693                                 'ar_title' => 'cur_title',
1694                                 'ar_text' => 'old_text',
1695                                 'ar_comment' => 'old_comment',
1696                                 'ar_user' => 'old_user',
1697                                 'ar_user_text' => 'old_user_text',
1698                                 'ar_timestamp' => 'old_timestamp',
1699                                 'ar_minor_edit' => 'old_minor_edit',
1700                                 'ar_flags' => 'old_flags'
1701                         ), array(
1702                                 'old_articleid' => $artid
1703                         ), $fname
1704                 );
1705
1706                 # Now that it's safely backed up, delete it
1707
1708                 $dbw->delete( 'cur', array( 'cur_namespace' => $ns, 'cur_title' => $t ), $fname );
1709                 $dbw->delete( 'old', array( 'old_articleid' => $artid ), $fname );
1710                 $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), $fname );
1711
1712                 # Finally, clean up the link tables
1713                 $t = $this->mTitle->getPrefixedDBkey();
1714
1715                 Article::onArticleDelete( $this->mTitle );
1716
1717                 # Insert broken links
1718                 $brokenLinks = array();
1719                 foreach ( $linksTo as $titleObj ) {
1720                         # Get article ID. Efficient because it was loaded into the cache by getLinksTo().
1721                         $linkID = $titleObj->getArticleID();
1722                         $brokenLinks[] = array( 'bl_from' => $linkID, 'bl_to' => $t );
1723                 }
1724                 $dbw->insertArray( 'brokenlinks', $brokenLinks, $fname, 'IGNORE' );
1725
1726                 # Delete live links
1727                 $dbw->delete( 'links', array( 'l_to' => $id ) );
1728                 $dbw->delete( 'links', array( 'l_from' => $id ) );
1729                 $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
1730                 $dbw->delete( 'brokenlinks', array( 'bl_from' => $id ) );
1731                 $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
1732
1733                 # Log the deletion
1734                 $log = new LogPage( 'delete' );
1735                 $log->addEntry( 'delete', $this->mTitle, $reason );
1736
1737                 # Clear the cached article id so the interface doesn't act like we exist
1738                 $this->mTitle->resetArticleID( 0 );
1739                 $this->mTitle->mArticleID = 0;
1740                 return true;
1741         }
1742
1743         /**
1744          * Revert a modification
1745          */
1746         function rollback() {
1747                 global $wgUser, $wgOut, $wgRequest;
1748                 $fname = 'Article::rollback';
1749
1750                 if ( ! $wgUser->isSysop() ) {
1751                         $wgOut->sysopRequired();
1752                         return;
1753                 }
1754                 if ( wfReadOnly() ) {
1755                         $wgOut->readOnlyPage( $this->getContent( true ) );
1756                         return;
1757                 }
1758                 $dbw =& wfGetDB( DB_MASTER );
1759
1760                 # Enhanced rollback, marks edits rc_bot=1
1761                 $bot = $wgRequest->getBool( 'bot' );
1762
1763                 # Replace all this user's current edits with the next one down
1764                 $tt = $this->mTitle->getDBKey();
1765                 $n = $this->mTitle->getNamespace();
1766
1767                 # Get the last editor, lock table exclusively
1768                 $s = $dbw->getArray( 'cur',
1769                         array( 'cur_id','cur_user','cur_user_text','cur_comment' ),
1770                         array( 'cur_title' => $tt, 'cur_namespace' => $n ),
1771                         $fname, 'FOR UPDATE'
1772                 );
1773                 if( $s === false ) {
1774                         # Something wrong
1775                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
1776                         return;
1777                 }
1778                 $ut = $dbw->strencode( $s->cur_user_text );
1779                 $uid = $s->cur_user;
1780                 $pid = $s->cur_id;
1781
1782                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
1783                 if( $from != $s->cur_user_text ) {
1784                         $wgOut->setPageTitle(wfmsg('rollbackfailed'));
1785                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
1786                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
1787                                 htmlspecialchars( $from ),
1788                                 htmlspecialchars( $s->cur_user_text ) ) );
1789                         if($s->cur_comment != '') {
1790                                 $wgOut->addHTML(
1791                                         wfMsg('editcomment',
1792                                         htmlspecialchars( $s->cur_comment ) ) );
1793                         }
1794                         return;
1795                 }
1796
1797                 # Get the last edit not by this guy
1798                 $s = $dbw->getArray( 'old',
1799                         array( 'old_text','old_user','old_user_text','old_timestamp','old_flags' ),
1800                         array(
1801                                 'old_articleid' => $pid,
1802                                 "old_user <> {$uid} OR old_user_text <> '{$ut}'"
1803                         ), $fname, array( 'FOR UPDATE', 'USE INDEX' => 'articleid_timestamp' )
1804                 );
1805                 if( $s === false ) {
1806                         # Something wrong
1807                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
1808                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
1809                         return;
1810                 }
1811
1812                 if ( $bot ) {
1813                         # Mark all reverted edits as bot
1814                         $dbw->updateArray( 'recentchanges',
1815                                 array( /* SET */
1816                                         'rc_bot' => 1
1817                                 ), array( /* WHERE */
1818                                         'rc_user' => $uid,
1819                                         "rc_timestamp > '{$s->old_timestamp}'",
1820                                 ), $fname
1821                         );
1822                 }
1823
1824                 # Save it!
1825                 $newcomment = wfMsg( 'revertpage', $s->old_user_text, $from );
1826                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1827                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1828                 $wgOut->addHTML( '<h2>' . $newcomment . "</h2>\n<hr />\n" );
1829                 $this->updateArticle( Article::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1830                 Article::onArticleEdit( $this->mTitle );
1831                 $wgOut->returnToMain( false );
1832         }
1833
1834
1835         /**
1836          * Do standard deferred updates after page view
1837          * @private
1838          */
1839         function viewUpdates() {
1840                 global $wgDeferredUpdateList;
1841                 if ( 0 != $this->getID() ) {
1842                         global $wgDisableCounters;
1843                         if( !$wgDisableCounters ) {
1844                                 Article::incViewCount( $this->getID() );
1845                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1846                                 array_push( $wgDeferredUpdateList, $u );
1847                         }
1848                 }
1849                 $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(),
1850                   $this->mTitle->getDBkey() );
1851                 array_push( $wgDeferredUpdateList, $u );
1852         }
1853
1854         /**
1855          * Do standard deferred updates after page edit.
1856          * Every 1000th edit, prune the recent changes table.
1857          * @private
1858          * @param string $text
1859          */
1860         function editUpdates( $text ) {
1861                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1862                 global $wgMessageCache;
1863
1864                 wfSeedRandom();
1865                 if ( 0 == mt_rand( 0, 999 ) ) {
1866                         $dbw =& wfGetDB( DB_MASTER );
1867                         $cutoff = $dbw->timestamp( time() - ( 7 * 86400 ) );
1868                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1869                         $dbw->query( $sql );
1870                 }
1871                 $id = $this->getID();
1872                 $title = $this->mTitle->getPrefixedDBkey();
1873                 $shortTitle = $this->mTitle->getDBkey();
1874
1875                 $adj = $this->mCountAdjustment;
1876
1877                 if ( 0 != $id ) {
1878                         $u = new LinksUpdate( $id, $title );
1879                         array_push( $wgDeferredUpdateList, $u );
1880                         $u = new SiteStatsUpdate( 0, 1, $adj );
1881                         array_push( $wgDeferredUpdateList, $u );
1882                         $u = new SearchUpdate( $id, $title, $text );
1883                         array_push( $wgDeferredUpdateList, $u );
1884
1885                         $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle );
1886                         array_push( $wgDeferredUpdateList, $u );
1887
1888                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1889                                 $wgMessageCache->replace( $shortTitle, $text );
1890                         }
1891                 }
1892         }
1893
1894         /**
1895          * @todo document this function
1896          * @private
1897          */
1898         function setOldSubtitle() {
1899                 global $wgLang, $wgOut, $wgUser;
1900
1901                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1902                 $sk = $wgUser->getSkin();
1903                 $lnk = $sk->makeKnownLinkObj ( $this->mTitle, wfMsg( 'currentrevisionlink' ) );
1904                 $r = wfMsg( 'revisionasofwithlink', $td, $lnk );
1905                 $wgOut->setSubtitle( $r );
1906         }
1907
1908         /**
1909          * This function is called right before saving the wikitext,
1910          * so we can do things like signatures and links-in-context.
1911          *
1912          * @param string $text
1913          */
1914         function preSaveTransform( $text ) {
1915                 global $wgParser, $wgUser;
1916                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
1917         }
1918
1919         /* Caching functions */
1920
1921         /**
1922          * checkLastModified returns true if it has taken care of all
1923          * output to the client that is necessary for this request.
1924          * (that is, it has sent a cached version of the page)
1925          */
1926         function tryFileCache() {
1927                 static $called = false;
1928                 if( $called ) {
1929                         wfDebug( " tryFileCache() -- called twice!?\n" );
1930                         return;
1931                 }
1932                 $called = true;
1933                 if($this->isFileCacheable()) {
1934                         $touched = $this->mTouched;
1935                         if( $this->mTitle->getPrefixedDBkey() == wfMsg( 'mainpage' ) ) {
1936                                 # Expire the main page quicker
1937                                 $expire = wfUnix2Timestamp( time() - 3600 );
1938                                 $touched = max( $expire, $touched );
1939                         }
1940                         $cache = new CacheManager( $this->mTitle );
1941                         if($cache->isFileCacheGood( $touched )) {
1942                                 global $wgOut;
1943                                 wfDebug( " tryFileCache() - about to load\n" );
1944                                 $cache->loadFromFileCache();
1945                                 return true;
1946                         } else {
1947                                 wfDebug( " tryFileCache() - starting buffer\n" );
1948                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1949                         }
1950                 } else {
1951                         wfDebug( " tryFileCache() - not cacheable\n" );
1952                 }
1953         }
1954
1955         /**
1956          * Check if the page can be cached
1957          * @return bool
1958          */
1959         function isFileCacheable() {
1960                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
1961                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
1962
1963                 return $wgUseFileCache
1964                         and (!$wgShowIPinHeader)
1965                         and ($this->getID() != 0)
1966                         and ($wgUser->getId() == 0)
1967                         and (!$wgUser->getNewtalk())
1968                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
1969                         and (empty( $action ) || $action == 'view')
1970                         and (!isset($oldid))
1971                         and (!isset($diff))
1972                         and (!isset($redirect))
1973                         and (!isset($printable))
1974                         and (!$this->mRedirectedFrom);
1975         }
1976
1977         /**
1978          * Loads cur_touched and returns a value indicating if it should be used
1979          *
1980          */
1981         function checkTouched() {
1982                 $fname = 'Article::checkTouched';
1983                 $id = $this->getID();
1984                 $dbr =& $this->getDB();
1985                 $s = $dbr->getArray( 'cur', array( 'cur_touched', 'cur_is_redirect' ),
1986                         array( 'cur_id' => $id ), $fname, $this->getSelectOptions() );
1987                 if( $s !== false ) {
1988                         $this->mTouched = wfTimestamp(TS_MW,$s->cur_touched);
1989                         return !$s->cur_is_redirect;
1990                 } else {
1991                         return false;
1992                 }
1993         }
1994
1995         /**
1996          * Edit an article without doing all that other stuff
1997          *
1998          * @param string $text text submitted
1999          * @param string $comment comment submitted
2000          * @param integer $minor whereas it's a minor modification
2001          */
2002         function quickEdit( $text, $comment = '', $minor = 0 ) {
2003                 global $wgUser;
2004                 $fname = 'Article::quickEdit';
2005                 wfProfileIn( $fname );
2006
2007                 $dbw =& wfGetDB( DB_MASTER );
2008                 $ns = $this->mTitle->getNamespace();
2009                 $dbkey = $this->mTitle->getDBkey();
2010                 $encDbKey = $dbw->strencode( $dbkey );
2011                 $timestamp = wfTimestampNow();
2012
2013                 # Save to history
2014                 $dbw->insertSelect( 'old', 'cur',
2015                         array(
2016                                 'old_articleid' => 'cur_id',
2017                                 'old_text' => 'cur_text',
2018                                 'old_comment' => 'cur_comment',
2019                                 'old_user' => 'cur_user',
2020                                 'old_user_text' => 'cur_user_text',
2021                                 'old_timestamp' => 'cur_timestamp',
2022                                 'inverse_timestamp' => '99999999999999-cur_timestamp',
2023                         ), array(
2024                                 'cur_namespace' => $ns,
2025                                 'cur_title' => $dbkey,
2026                         ), $fname
2027                 );
2028
2029                 # Use the affected row count to determine if the article is new
2030                 $numRows = $dbw->affectedRows();
2031
2032                 # Make an array of fields to be inserted
2033                 $fields = array(
2034                         'cur_text' => $text,
2035                         'cur_timestamp' => $timestamp,
2036                         'cur_user' => $wgUser->getID(),
2037                         'cur_user_text' => $wgUser->getName(),
2038                         'inverse_timestamp' => wfInvertTimestamp( $timestamp ),
2039                         'cur_comment' => $comment,
2040                         'cur_is_redirect' => $this->isRedirect( $text ) ? 1 : 0,
2041                         'cur_minor_edit' => intval($minor),
2042                         'cur_touched' => $dbw->timestamp($timestamp),
2043                 );
2044
2045                 if ( $numRows ) {
2046                         # Update article
2047                         $fields['cur_is_new'] = 0;
2048                         $dbw->updateArray( 'cur', $fields, array( 'cur_namespace' => $ns, 'cur_title' => $dbkey ), $fname );
2049                 } else {
2050                         # Insert new article
2051                         $fields['cur_is_new'] = 1;
2052                         $fields['cur_namespace'] = $ns;
2053                         $fields['cur_title'] = $dbkey;
2054                         $fields['cur_random'] = $rand = number_format( mt_rand() / mt_getrandmax(), 12, '.', '' );
2055                         $dbw->insertArray( 'cur', $fields, $fname );
2056                 }
2057                 wfProfileOut( $fname );
2058         }
2059
2060         /**
2061          * Used to increment the view counter
2062          *
2063          * @static
2064          * @param integer $id article id
2065          */
2066         function incViewCount( $id ) {
2067                 $id = intval( $id );
2068                 global $wgHitcounterUpdateFreq;
2069
2070                 $dbw =& wfGetDB( DB_MASTER );
2071                 $curTable = $dbw->tableName( 'cur' );
2072                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
2073                 $acchitsTable = $dbw->tableName( 'acchits' );
2074
2075                 if( $wgHitcounterUpdateFreq <= 1 ){ //
2076                         $dbw->query( "UPDATE $curTable SET cur_counter = cur_counter + 1 WHERE cur_id = $id" );
2077                         return;
2078                 }
2079
2080                 # Not important enough to warrant an error page in case of failure
2081                 $oldignore = $dbw->ignoreErrors( true );
2082
2083                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
2084
2085                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
2086                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
2087                         # Most of the time (or on SQL errors), skip row count check
2088                         $dbw->ignoreErrors( $oldignore );
2089                         return;
2090                 }
2091
2092                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
2093                 $row = $dbw->fetchObject( $res );
2094                 $rown = intval( $row->n );
2095                 if( $rown >= $wgHitcounterUpdateFreq ){
2096                         wfProfileIn( 'Article::incViewCount-collect' );
2097                         $old_user_abort = ignore_user_abort( true );
2098
2099                         $dbw->query("LOCK TABLES $hitcounterTable WRITE");
2100                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable TYPE=HEAP ".
2101                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
2102                                 'GROUP BY hc_id');
2103                         $dbw->query("DELETE FROM $hitcounterTable");
2104                         $dbw->query('UNLOCK TABLES');
2105                         $dbw->query("UPDATE $curTable,$acchitsTable SET cur_counter=cur_counter + hc_n ".
2106                                 'WHERE cur_id = hc_id');
2107                         $dbw->query("DROP TABLE $acchitsTable");
2108
2109                         ignore_user_abort( $old_user_abort );
2110                         wfProfileOut( 'Article::incViewCount-collect' );
2111                 }
2112                 $dbw->ignoreErrors( $oldignore );
2113         }
2114
2115         /**#@+
2116          * The onArticle*() functions are supposed to be a kind of hooks
2117          * which should be called whenever any of the specified actions
2118          * are done.
2119          *
2120          * This is a good place to put code to clear caches, for instance.
2121          *
2122          * This is called on page move and undelete, as well as edit
2123          * @static
2124          * @param $title_obj a title object
2125          */
2126
2127         function onArticleCreate($title_obj) {
2128                 global $wgUseSquid, $wgDeferredUpdateList;
2129
2130                 $titles = $title_obj->getBrokenLinksTo();
2131
2132                 # Purge squid
2133                 if ( $wgUseSquid ) {
2134                         $urls = $title_obj->getSquidURLs();
2135                         foreach ( $titles as $linkTitle ) {
2136                                 $urls[] = $linkTitle->getInternalURL();
2137                         }
2138                         $u = new SquidUpdate( $urls );
2139                         array_push( $wgDeferredUpdateList, $u );
2140                 }
2141
2142                 # Clear persistent link cache
2143                 LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
2144         }
2145
2146         function onArticleDelete($title_obj) {
2147                 LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
2148         }
2149         function onArticleEdit($title_obj) {
2150                 LinkCache::linksccClearPage( $title_obj->getArticleID() );
2151         }
2152         /**#@-*/
2153
2154         /**
2155          * Info about this page
2156          */
2157         function info() {
2158                 global $wgUser, $wgTitle, $wgOut, $wgAllowPageInfo;
2159                 $fname = 'Article::info';
2160
2161                 if ( !$wgAllowPageInfo ) {
2162                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
2163                         return;
2164                 }
2165
2166                 $dbr =& $this->getDB();
2167
2168                 $basenamespace = $wgTitle->getNamespace() & (~1);
2169                 $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace );
2170                 $old_clause = array( 'old_articleid' => $wgTitle->getArticleID() );
2171                 $wl_clause  = array( 'wl_title' => $wgTitle->getDBkey(), 'wl_namespace' => $basenamespace );
2172                 $fullTitle = $wgTitle->makeName($basenamespace, $wgTitle->getDBKey());
2173                 $wgOut->setPagetitle(  $fullTitle );
2174                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
2175
2176                 # first, see if the page exists at all.
2177                 $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2178                 if ($exists < 1) {
2179                         $wgOut->addHTML( wfMsg('noarticletext') );
2180                 } else {
2181                         $numwatchers = $dbr->selectField( 'watchlist', 'COUNT(*)', $wl_clause, $fname,
2182                                 $this->getSelectOptions() );
2183                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $numwatchers) . '</li>' );
2184                         $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2185                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $old + 1) . '</li>');
2186
2187                         # to find number of distinct authors, we need to do some
2188                         # funny stuff because of the cur/old table split:
2189                         # - first, find the name of the 'cur' author
2190                         # - then, find the number of *other* authors in 'old'
2191
2192                         # find 'cur' author
2193                         $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2194                                 $this->getSelectOptions() );
2195
2196                         # find number of 'old' authors excluding 'cur' author
2197                         $authors = $dbr->selectField( 'old', 'COUNT(DISTINCT old_user_text)',
2198                                 $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ), $fname,
2199                                 $this->getSelectOptions() ) + 1;
2200
2201                         # now for the Talk page ...
2202                         $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace+1 );
2203
2204                         # does it exist?
2205                         $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2206
2207                         # number of edits
2208                         if ($exists > 0) {
2209                                 $oldartid = $dbr->selectField( 'cur', 'cur_id',
2210                                         $cur_clause, $fname, $this->getSelectOptions());
2211                                 $old_clause = array( 'old_articleid' => $oldartid );
2212                                 $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2213                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $old + 1) . '</li>');
2214                         }
2215                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $authors) . '</li>' );
2216
2217                         # number of authors
2218                         if ($exists > 0) {
2219                                 $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2220                                         $this->getSelectOptions() );
2221                                 $authors = $dbr->selectField( 'cur', 'COUNT(DISTINCT old_user_text)',
2222                                         $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ),
2223                                         $fname, $this->getSelectOptions() );
2224
2225                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $authors) . '</li></ul>' );
2226                         }
2227                 }
2228         }
2229 }
2230
2231 ?>