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