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