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