includes/Article.php

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