includes/Article.php

   1 <?php
   2 # $Id$
   3 #
   4 # Class representing a Wikipedia article and history.
   5 # See design.doc for an overview.
   6
   7 # Note: edit user interface and cache support functions have been
   8 # moved to separate EditPage and CacheManager classes.
   9
  10 require_once ( 'CacheManager.php' );
  11 include_once ( 'SpecialValidate.php' ) ;
  12
  13 $wgArticleCurContentFields = false;
  14 $wgArticleOldContentFields = false;
  15
  16 class Article {
  17         /* private */ var $mContent, $mContentLoaded;
  18         /* private */ var $mUser, $mTimestamp, $mUserText;
  19         /* private */ var $mCounter, $mComment, $mCountAdjustment;
  20         /* private */ var $mMinorEdit, $mRedirectedFrom;
  21         /* private */ var $mTouched, $mFileCache, $mTitle;
  22         /* private */ var $mId, $mTable;
  23         /* private */ var $mForUpdate;
  24
  25         function Article( &$title ) {
  26                 $this->mTitle =& $title;
  27                 $this->clear();
  28         }
  29
  30         /* private */ function clear() {
  31                 $this->mContentLoaded = false;
  32                 $this->mCurID = $this->mUser = $this->mCounter = -1; # Not loaded
  33                 $this->mRedirectedFrom = $this->mUserText =
  34                 $this->mTimestamp = $this->mComment = $this->mFileCache = '';
  35                 $this->mCountAdjustment = 0;
  36                 $this->mTouched = '19700101000000';
  37                 $this->mForUpdate = false;
  38         }
  39
  40         # Get revision text associated with an old or archive row
  41         # $row is usually an object from wfFetchRow(), both the flags and the text field must be included
  42         /* static */ function getRevisionText( $row, $prefix = 'old_' ) {
  43                 # Get data
  44                 $textField = $prefix . 'text';
  45                 $flagsField = $prefix . 'flags';
  46
  47                 if ( isset( $row->$flagsField ) ) {
  48                         $flags = explode( ",", $row->$flagsField );
  49                 } else {
  50                         $flags = array();
  51                 }
  52
  53                 if ( isset( $row->$textField ) ) {
  54                         $text = $row->$textField;
  55                 } else {
  56                         return false;
  57                 }
  58
  59                 if ( in_array( 'link', $flags ) ) {
  60                         # Handle link type
  61                         $text = Article::followLink( $text );
  62                 } elseif ( in_array( 'gzip', $flags ) ) {
  63                         # Deal with optional compression of archived pages.
  64                         # This can be done periodically via maintenance/compressOld.php, and
  65                         # as pages are saved if $wgCompressRevisions is set.
  66                         return gzinflate( $text );
  67                 }
  68                 return $text;
  69         }
  70
  71         /* static */ function compressRevisionText( &$text ) {
  72                 global $wgCompressRevisions;
  73                 if( !$wgCompressRevisions ) {
  74                         return '';
  75                 }
  76                 if( !function_exists( 'gzdeflate' ) ) {
  77                         wfDebug( "Article::compressRevisionText() -- no zlib support, not compressing\n" );
  78                         return '';
  79                 }
  80                 $text = gzdeflate( $text );
  81                 return 'gzip';
  82         }
  83
  84         # Returns the text associated with a "link" type old table row
  85         /* static */ function followLink( $link ) {
  86                 # Split the link into fields and values
  87                 $lines = explode( '\n', $link );
  88                 $hash = '';
  89                 $locations = array();
  90                 foreach ( $lines as $line ) {
  91                         # Comments
  92                         if ( $line{0} == '#' ) {
  93                                 continue;
  94                         }
  95                         # Field/value pairs
  96                         if ( preg_match( '/^(.*?)\s*:\s*(.*)$/', $line, $matches ) ) {
  97                                 $field = strtolower($matches[1]);
  98                                 $value = $matches[2];
  99                                 if ( $field == 'hash' ) {
 100                                         $hash = $value;
 101                                 } elseif ( $field == 'location' ) {
 102                                         $locations[] = $value;
 103                                 }
 104                         }
 105                 }
 106
 107                 if ( $hash === '' ) {
 108                         return false;
 109                 }
 110
 111                 # Look in each specified location for the text
 112                 $text = false;
 113                 foreach ( $locations as $location ) {
 114                         $text = Article::fetchFromLocation( $location, $hash );
 115                         if ( $text !== false ) {
 116                                 break;
 117                         }
 118                 }
 119
 120                 return $text;
 121         }
 122
 123         /* static */ function fetchFromLocation( $location, $hash ) {
 124                 global $wgLoadBalancer;
 125                 $fname = 'fetchFromLocation';
 126                 wfProfileIn( $fname );
 127
 128                 $p = strpos( $location, ':' );
 129                 if ( $p === false ) {
 130                         wfProfileOut( $fname );
 131                         return false;
 132                 }
 133
 134                 $type = substr( $location, 0, $p );
 135                 $text = false;
 136                 switch ( $type ) {
 137                         case 'mysql':
 138                                 # MySQL locations are specified by mysql://<machineID>/<dbname>/<tblname>/<index>
 139                                 # Machine ID 0 is the current connection
 140                                 if ( preg_match( '/^mysql:\/\/(\d+)\/([A-Za-z_]+)\/([A-Za-z_]+)\/([A-Za-z_]+)$/',
 141                                   $location, $matches ) ) {
 142                                         $machineID = $matches[1];
 143                                         $dbName = $matches[2];
 144                                         $tblName = $matches[3];
 145                                         $index = $matches[4];
 146                                         if ( $machineID == 0 ) {
 147                                                 # Current connection
 148                                                 $db =& $this->getDB();
 149                                         } else {
 150                                                 # Alternate connection
 151                                                 $db =& $wgLoadBalancer->getConnection( $machineID );
 152
 153                                                 if ( array_key_exists( $machineId, $wgKnownMysqlServers ) ) {
 154                                                         # Try to open, return false on failure
 155                                                         $params = $wgKnownDBServers[$machineId];
 156                                                         $db = Database::newFromParams( $params['server'], $params['user'], $params['password'],
 157                                                                 $dbName, 1, DBO_IGNORE );
 158                                                 }
 159                                         }
 160                                         if ( $db->isOpen() ) {
 161                                                 $index = $db->strencode( $index );
 162                                                 $res = $db->query( "SELECT blob_data FROM $dbName.$tblName " .
 163                                                         "WHERE blob_index='$index' " . $this->getSelectOptions(), $fname );
 164                                                 $row = $db->fetchObject( $res );
 165                                                 $text = $row->text_data;
 166                                         }
 167                                 }
 168                                 break;
 169                         case 'file':
 170                                 # File locations are of the form file://<filename>, relative to the current directory
 171                                 if ( preg_match( '/^file:\/\/(.*)$', $location, $matches ) )
 172                                 $filename = strstr( $location, 'file://' );
 173                                 $text = @file_get_contents( $matches[1] );
 174                 }
 175                 if ( $text !== false ) {
 176                         # Got text, now we need to interpret it
 177                         # The first line contains information about how to do this
 178                         $p = strpos( $text, '\n' );
 179                         $type = substr( $text, 0, $p );
 180                         $text = substr( $text, $p + 1 );
 181                         switch ( $type ) {
 182                                 case 'plain':
 183                                         break;
 184                                 case 'gzip':
 185                                         $text = gzinflate( $text );
 186                                         break;
 187                                 case 'object':
 188                                         $object = unserialize( $text );
 189                                         $text = $object->getItem( $hash );
 190                                         break;
 191                                 default:
 192                                         $text = false;
 193                         }
 194                 }
 195                 wfProfileOut( $fname );
 196                 return $text;
 197         }
 198
 199         # Note that getContent/loadContent may follow redirects if
 200         # not told otherwise, and so may cause a change to mTitle.
 201
 202         # Return the text of this revision
 203         function getContent( $noredir ) {
 204                 global $wgRequest;
 205
 206                 # Get variables from query string :P
 207                 $action = $wgRequest->getText( 'action', 'view' );
 208                 $section = $wgRequest->getText( 'section' );
 209
 210                 $fname =  'Article::getContent';
 211                 wfProfileIn( $fname );
 212
 213                 if ( 0 == $this->getID() ) {
 214                         if ( 'edit' == $action ) {
 215                                 wfProfileOut( $fname );
 216                                 return ''; # was "newarticletext", now moved above the box)
 217                         }
 218                         wfProfileOut( $fname );
 219                         return wfMsg( 'noarticletext' );
 220                 } else {
 221                         $this->loadContent( $noredir );
 222                         # check if we're displaying a [[User talk:x.x.x.x]] anonymous talk page
 223                         if ( $this->mTitle->getNamespace() == NS_USER_TALK &&
 224                           preg_match('/^\d{1,3}\.\d{1,3}.\d{1,3}\.\d{1,3}$/',$this->mTitle->getText()) &&
 225                           $action=='view'
 226                         ) {
 227                                 wfProfileOut( $fname );
 228                                 return $this->mContent . "\n" .wfMsg('anontalkpagetext');
 229                         } else {
 230                                 if($action=='edit') {
 231                                         if($section!='') {
 232                                                 if($section=='new') {
 233                                                         wfProfileOut( $fname );
 234                                                         return '';
 235                                                 }
 236
 237                                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 238                                                 # comments to be stripped as well)
 239                                                 $rv=$this->getSection($this->mContent,$section);
 240                                                 wfProfileOut( $fname );
 241                                                 return $rv;
 242                                         }
 243                                 }
 244                                 wfProfileOut( $fname );
 245                                 return $this->mContent;
 246                         }
 247                 }
 248         }
 249
 250         # This function returns the text of a section, specified by a number ($section).
 251         # A section is text under a heading like == Heading == or <h1>Heading</h1>, or
 252         # the first section before any such heading (section 0).
 253         #
 254         # If a section contains subsections, these are also returned.
 255         #
 256         function getSection($text,$section) {
 257
 258                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 259                 # comments to be stripped as well)
 260                 $striparray=array();
 261                 $parser=new Parser();
 262                 $parser->mOutputType=OT_WIKI;
 263                 $striptext=$parser->strip($text, $striparray, true);
 264
 265                 # now that we can be sure that no pseudo-sections are in the source,
 266                 # split it up by section
 267                 $secs =
 268                   preg_split(
 269                   '/(^=+.*?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)/mi',
 270                   $striptext, -1,
 271                   PREG_SPLIT_DELIM_CAPTURE);
 272                 if($section==0) {
 273                         $rv=$secs[0];
 274                 } else {
 275                         $headline=$secs[$section*2-1];
 276                         preg_match( '/^(=+).*?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>/mi',$headline,$matches);
 277                         $hlevel=$matches[1];
 278
 279                         # translate wiki heading into level
 280                         if(strpos($hlevel,'=')!==false) {
 281                                 $hlevel=strlen($hlevel);
 282                         }
 283
 284                         $rv=$headline. $secs[$section*2];
 285                         $count=$section+1;
 286
 287                         $break=false;
 288                         while(!empty($secs[$count*2-1]) && !$break) {
 289
 290                                 $subheadline=$secs[$count*2-1];
 291                                 preg_match( '/^(=+).*?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>/mi',$subheadline,$matches);
 292                                 $subhlevel=$matches[1];
 293                                 if(strpos($subhlevel,'=')!==false) {
 294                                         $subhlevel=strlen($subhlevel);
 295                                 }
 296                                 if($subhlevel > $hlevel) {
 297                                         $rv.=$subheadline.$secs[$count*2];
 298                                 }
 299                                 if($subhlevel <= $hlevel) {
 300                                         $break=true;
 301                                 }
 302                                 $count++;
 303
 304                         }
 305                 }
 306                 # reinsert stripped tags
 307                 $rv=$parser->unstrip($rv,$striparray);
 308                 $rv=$parser->unstripNoWiki($rv,$striparray);
 309                 $rv=trim($rv);
 310                 return $rv;
 311
 312         }
 313
 314         # Return an array of the columns of the "cur"-table
 315         function &getCurContentFields() {
 316                 global $wgArticleCurContentFields;
 317                 if ( !$wgArticleCurContentFields ) {
 318                         $wgArticleCurContentFields = array( 'cur_text','cur_timestamp','cur_user', 'cur_user_text',
 319                           'cur_comment','cur_counter','cur_restrictions','cur_touched' );
 320                 }
 321                 return $wgArticleCurContentFields;
 322         }
 323
 324         # Return an array of the columns of the "old"-table
 325         function &getOldContentFields() {
 326                 global $wgArticleOldContentFields;
 327                 if ( !$wgArticleOldContentFields ) {
 328                         $wgArticleOldContentFields = array( 'old_namespace','old_title','old_text','old_timestamp',
 329                           'old_user','old_user_text','old_comment','old_flags' );
 330                 }
 331                 return $wgArticleOldContentFields;
 332         }
 333
 334         # Load the revision (including cur_text) into this object
 335         function loadContent( $noredir = false ) {
 336                 global $wgOut, $wgMwRedir, $wgRequest;
 337
 338                 $dbr =& $this->getDB();
 339                 # Query variables :P
 340                 $oldid = $wgRequest->getVal( 'oldid' );
 341                 $redirect = $wgRequest->getVal( 'redirect' );
 342
 343                 if ( $this->mContentLoaded ) return;
 344                 $fname = 'Article::loadContent';
 345
 346                 # Pre-fill content with error message so that if something
 347                 # fails we'll have something telling us what we intended.
 348
 349                 $t = $this->mTitle->getPrefixedText();
 350                 if ( isset( $oldid ) ) {
 351                         $oldid = IntVal( $oldid );
 352                         $t .= ",oldid={$oldid}";
 353                 }
 354                 if ( isset( $redirect ) ) {
 355                         $redirect = ($redirect == 'no') ? 'no' : 'yes';
 356                         $t .= ",redirect={$redirect}";
 357                 }
 358                 $this->mContent = wfMsg( 'missingarticle', $t );
 359
 360                 if ( ! $oldid ) {       # Retrieve current version
 361                         $id = $this->getID();
 362                         if ( 0 == $id ) return;
 363
 364                         $s = $dbr->selectRow( 'cur', $this->getCurContentFields(), array( 'cur_id' => $id ), $fname,
 365                                 $this->getSelectOptions() );
 366                         if ( $s === false ) {
 367                                 return;
 368                         }
 369
 370                         # If we got a redirect, follow it (unless we've been told
 371                         # not to by either the function parameter or the query
 372                         if ( ( 'no' != $redirect ) && ( false == $noredir ) ) {
 373                                 $rt = Title::newFromRedirect( $s->cur_text );
 374                                 if ( $rt && ! ( $rt->getNamespace() == NS_SPECIAL && $rt->getText() == 'Userlogout' ) ) {
 375                                         # Gotta hand redirects to special pages differently:
 376                                         # Fill the HTTP response "Location" header and ignore
 377                                         # the rest of the page we're on.
 378
 379                                         if ( $rt->getInterwiki() != '' ) {
 380                                                 $wgOut->redirect( $rt->getFullURL() ) ;
 381                                                 return;
 382                                         }
 383                                         if ( $rt->getNamespace() == NS_SPECIAL ) {
 384                                                 $wgOut->redirect( $rt->getFullURL() );
 385                                                 return;
 386                                         }
 387                                         $rid = $rt->getArticleID();
 388                                         if ( 0 != $rid ) {
 389                                                 $redirRow = $dbr->selectRow( 'cur', $this->getCurContentFields(),
 390                                                         array( 'cur_id' => $rid ), $fname, $this->getSelectOptions() );
 391
 392                                                 if ( $redirRow !== false ) {
 393                                                         $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 394                                                         $this->mTitle = $rt;
 395                                                         $s = $redirRow;
 396                                                 }
 397                                         }
 398                                 }
 399                         }
 400
 401                         $this->mContent = $s->cur_text;
 402                         $this->mUser = $s->cur_user;
 403                         $this->mUserText = $s->cur_user_text;
 404                         $this->mComment = $s->cur_comment;
 405                         $this->mCounter = $s->cur_counter;
 406                         $this->mTimestamp = wfTimestamp(TS_MW,$s->cur_timestamp);
 407                         $this->mTouched = wfTimestamp(TS_MW,$s->cur_touched);
 408                         $this->mTitle->mRestrictions = explode( ',', trim( $s->cur_restrictions ) );
 409                         $this->mTitle->mRestrictionsLoaded = true;
 410                 } else { # oldid set, retrieve historical version
 411                         $s = $dbr->getArray( 'old', $this->getOldContentFields(), array( 'old_id' => $oldid ),
 412                                 $fname, $this->getSelectOptions() );
 413                         if ( $s === false ) {
 414                                 return;
 415                         }
 416
 417                         if( $this->mTitle->getNamespace() != $s->old_namespace ||
 418                                 $this->mTitle->getDBkey() != $s->old_title ) {
 419                                 $oldTitle = Title::makeTitle( $s->old_namesapce, $s->old_title );
 420                                 $this->mTitle = $oldTitle;
 421                                 $wgTitle = $oldTitle;
 422                         }
 423                         $this->mContent = Article::getRevisionText( $s );
 424                         $this->mUser = $s->old_user;
 425                         $this->mUserText = $s->old_user_text;
 426                         $this->mComment = $s->old_comment;
 427                         $this->mCounter = 0;
 428                         $this->mTimestamp = wfTimestamp(TS_MW,$s->old_timestamp);
 429                 }
 430                 $this->mContentLoaded = true;
 431                 return $this->mContent;
 432         }
 433
 434         # Gets the article text without using so many damn globals
 435         # Returns false on error
 436         function getContentWithoutUsingSoManyDamnGlobals( $oldid = 0, $noredir = false ) {
 437                 global $wgMwRedir;
 438
 439                 if ( $this->mContentLoaded ) {
 440                         return $this->mContent;
 441                 }
 442                 $this->mContent = false;
 443
 444                 $fname = 'Article::getContentWithout';
 445                 $dbr =& $this->getDB();
 446
 447                 if ( ! $oldid ) {       # Retrieve current version
 448                         $id = $this->getID();
 449                         if ( 0 == $id ) {
 450                                 return false;
 451                         }
 452
 453                         $s = $dbr->selectRow( 'cur', $this->getCurContentFields(), array( 'cur_id' => $id ),
 454                                 $fname, $this->getSelectOptions() );
 455                         if ( $s === false ) {
 456                                 return false;
 457                         }
 458
 459                         # If we got a redirect, follow it (unless we've been told
 460                         # not to by either the function parameter or the query
 461                         if ( !$noredir ) {
 462                                 $rt = Title::newFromRedirect( $s->cur_text );
 463                                 if( $rt &&  $rt->getInterwiki() == '' && $rt->getNamespace() != NS_SPECIAL ) {
 464                                         $rid = $rt->getArticleID();
 465                                         if ( 0 != $rid ) {
 466                                                 $redirRow = $dbr->selectRow( 'cur', $this->getCurContentFields(),
 467                                                         array( 'cur_id' => $rid ), $fname, $this->getSelectOptions() );
 468
 469                                                 if ( $redirRow !== false ) {
 470                                                         $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 471                                                         $this->mTitle = $rt;
 472                                                         $s = $redirRow;
 473                                                 }
 474                                         }
 475                                 }
 476                         }
 477
 478                         $this->mContent = $s->cur_text;
 479                         $this->mUser = $s->cur_user;
 480                         $this->mUserText = $s->cur_user_text;
 481                         $this->mComment = $s->cur_comment;
 482                         $this->mCounter = $s->cur_counter;
 483                         $this->mTimestamp = wfTimestamp(TS_MW,$s->cur_timestamp);
 484                         $this->mTouched = wfTimestamp(TS_MW,$s->cur_touched);
 485                         $this->mTitle->mRestrictions = explode( ",", trim( $s->cur_restrictions ) );
 486                         $this->mTitle->mRestrictionsLoaded = true;
 487                 } else { # oldid set, retrieve historical version
 488                         $s = $dbr->selectRow( 'old', $this->getOldContentFields(), array( 'old_id' => $oldid ),
 489                                 $fname, $this->getSelectOptions() );
 490                         if ( $s === false ) {
 491                                 return false;
 492                         }
 493                         $this->mContent = Article::getRevisionText( $s );
 494                         $this->mUser = $s->old_user;
 495                         $this->mUserText = $s->old_user_text;
 496                         $this->mComment = $s->old_comment;
 497                         $this->mCounter = 0;
 498                         $this->mTimestamp = wfTimestamp(TS_MW,$s->old_timestamp);
 499                 }
 500                 $this->mContentLoaded = true;
 501                 return $this->mContent;
 502         }
 503
 504         # Read/write accessor to select FOR UPDATE
 505         function forUpdate( $x = NULL ) {
 506                 return wfSetVar( $this->mForUpdate, $x );
 507         }
 508
 509         # Get the database which should be used for reads
 510         function &getDB() {
 511                 if ( $this->mForUpdate ) {
 512                         return wfGetDB( DB_MASTER );
 513                 } else {
 514                         return wfGetDB( DB_SLAVE );
 515                 }
 516         }
 517
 518         # Get options for all SELECT statements
 519         # Can pass an option array, to which the class-wide options will be appended
 520         function getSelectOptions( $options = '' ) {
 521                 if ( $this->mForUpdate ) {
 522                         if ( $options ) {
 523                                 $options[] = 'FOR UPDATE';
 524                         } else {
 525                                 $options = 'FOR UPDATE';
 526                         }
 527                 }
 528                 return $options;
 529         }
 530
 531         function getID() {
 532                 if( $this->mTitle ) {
 533                         return $this->mTitle->getArticleID();
 534                 } else {
 535                         return 0;
 536                 }
 537         }
 538
 539         function getCount() {
 540                 if ( -1 == $this->mCounter ) {
 541                         $id = $this->getID();
 542                         $dbr =& $this->getDB();
 543                         $this->mCounter = $dbr->selectField( 'cur', 'cur_counter', "cur_id={$id}",
 544                                 'Article::getCount', $this->getSelectOptions() );
 545                 }
 546                 return $this->mCounter;
 547         }
 548
 549         # Would the given text make this article a "good" article (i.e.,
 550         # suitable for including in the article count)?
 551         function isCountable( $text ) {
 552                 global $wgUseCommaCount, $wgMwRedir;
 553
 554                 if ( 0 != $this->mTitle->getNamespace() ) { return 0; }
 555                 if ( $wgMwRedir->matchStart( $text ) ) { return 0; }
 556                 $token = ($wgUseCommaCount ? ',' : '[[' );
 557                 if ( false === strstr( $text, $token ) ) { return 0; }
 558                 return 1;
 559         }
 560
 561         # Loads everything from cur except cur_text
 562         # This isn't necessary for all uses, so it's only done if needed.
 563         /* private */ function loadLastEdit() {
 564                 global $wgOut;
 565                 if ( -1 != $this->mUser ) return;
 566
 567                 $fname = 'Article::loadLastEdit';
 568
 569                 $dbr =& $this->getDB();
 570                 $s = $dbr->getArray( 'cur',
 571                   array( 'cur_user','cur_user_text','cur_timestamp', 'cur_comment','cur_minor_edit' ),
 572                   array( 'cur_id' => $this->getID() ), $fname, $this->getSelectOptions() );
 573
 574                 if ( $s !== false ) {
 575                         $this->mUser = $s->cur_user;
 576                         $this->mUserText = $s->cur_user_text;
 577                         $this->mTimestamp = wfTimestamp(TS_MW,$s->cur_timestamp);
 578                         $this->mComment = $s->cur_comment;
 579                         $this->mMinorEdit = $s->cur_minor_edit;
 580                 }
 581         }
 582
 583         function getTimestamp() {
 584                 $this->loadLastEdit();
 585                 return $this->mTimestamp;
 586         }
 587
 588         function getUser() {
 589                 $this->loadLastEdit();
 590                 return $this->mUser;
 591         }
 592
 593         function getUserText() {
 594                 $this->loadLastEdit();
 595                 return $this->mUserText;
 596         }
 597
 598         function getComment() {
 599                 $this->loadLastEdit();
 600                 return $this->mComment;
 601         }
 602
 603         function getMinorEdit() {
 604                 $this->loadLastEdit();
 605                 return $this->mMinorEdit;
 606         }
 607
 608         function getContributors($limit = 0, $offset = 0) {
 609                 $fname = 'Article::getContributors';
 610
 611                 # XXX: this is expensive; cache this info somewhere.
 612
 613                 $title = $this->mTitle;
 614                 $contribs = array();
 615                 $dbr =& $this->getDB();
 616                 $oldTable = $dbr->tableName( 'old' );
 617                 $userTable = $dbr->tableName( 'user' );
 618                 $encDBkey = $dbr->strencode( $title->getDBkey() );
 619                 $ns = $title->getNamespace();
 620                 $user = $this->getUser();
 621
 622                 $sql = "SELECT old_user, old_user_text, user_real_name, MAX(old_timestamp) as timestamp
 623                         FROM $oldTable LEFT JOIN $userTable ON old_user = user_id
 624                         WHERE old_namespace = $user
 625                         AND old_title = $encDBkey
 626                         AND old_user != $user
 627                         GROUP BY old_user
 628                         ORDER BY timestamp DESC";
 629
 630                 if ($limit > 0) { $sql .= ' LIMIT '.$limit; }
 631                 $sql .= ' '. $this->getSelectOptions();
 632
 633                 $res = $dbr->query($sql, $fname);
 634
 635                 while ( $line = $dbr->fetchObject( $res ) ) {
 636                         $contribs[] = array($line->old_user, $line->old_user_text, $line->user_real_name);
 637                 }
 638
 639                 $dbr->freeResult($res);
 640                 return $contribs;
 641         }
 642
 643         # This is the default action of the script: just view the page of
 644         # the given title.
 645
 646         function view() {
 647                 global $wgUser, $wgOut, $wgLang, $wgRequest, $wgMwRedir, $wgOnlySysopsCanPatrol;
 648                 global $wgLinkCache, $IP, $wgEnableParserCache, $wgStylePath, $wgUseRCPatrol;
 649                 $sk = $wgUser->getSkin();
 650
 651                 $fname = 'Article::view';
 652                 wfProfileIn( $fname );
 653                 # Get variables from query string
 654                 $oldid = $wgRequest->getVal( 'oldid' );
 655                 $diff = $wgRequest->getVal( 'diff' );
 656                 $rcid = $wgRequest->getVal( 'rcid' );
 657
 658                 $wgOut->setArticleFlag( true );
 659                 $wgOut->setRobotpolicy( 'index,follow' );
 660                 # If we got diff and oldid in the query, we want to see a
 661                 # diff page instead of the article.
 662
 663                 if ( !is_null( $diff ) ) {
 664                         require_once( 'DifferenceEngine.php' );
 665                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 666                         $de = new DifferenceEngine( intval($oldid), intval($diff), intval($rcid) );
 667                         $de->showDiffPage();
 668                         wfProfileOut( $fname );
 669                         if( $diff == 0 ) {
 670                                 # Run view updates for current revision only
 671                                 $this->viewUpdates();
 672                         }
 673                         return;
 674                 }
 675                 if ( empty( $oldid ) && $this->checkTouched() ) {
 676                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 677                                 return;
 678                         } else if ( $this->tryFileCache() ) {
 679                                 # tell wgOut that output is taken care of
 680                                 $wgOut->disable();
 681                                 $this->viewUpdates();
 682                                 return;
 683                         }
 684                 }
 685                 # Should the parser cache be used?
 686                 if ( $wgEnableParserCache && intval($wgUser->getOption( 'stubthreshold' )) == 0 && empty( $oldid ) ) {
 687                         $pcache = true;
 688                 } else {
 689                         $pcache = false;
 690                 }
 691
 692                 $outputDone = false;
 693                 if ( $pcache ) {
 694                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 695                                 $outputDone = true;
 696                         }
 697                 }
 698                 if ( !$outputDone ) {
 699                         $text = $this->getContent( false ); # May change mTitle by following a redirect
 700
 701                         # Another whitelist check in case oldid or redirects are altering the title
 702                         if ( !$this->mTitle->userCanRead() ) {
 703                                 $wgOut->loginToUse();
 704                                 $wgOut->output();
 705                                 exit;
 706                         }
 707
 708
 709                         # We're looking at an old revision
 710
 711                         if ( !empty( $oldid ) ) {
 712                                 $this->setOldSubtitle();
 713                                 $wgOut->setRobotpolicy( 'noindex,follow' );
 714                         }
 715                         if ( '' != $this->mRedirectedFrom ) {
 716                                 $sk = $wgUser->getSkin();
 717                                 $redir = $sk->makeKnownLink( $this->mRedirectedFrom, '',
 718                                   'redirect=no' );
 719                                 $s = wfMsg( 'redirectedfrom', $redir );
 720                                 $wgOut->setSubtitle( $s );
 721
 722                                 # Can't cache redirects
 723                                 $pcache = false;
 724                         }
 725
 726                         # wrap user css and user js in pre and don't parse
 727                         # XXX: use $this->mTitle->usCssJsSubpage() when php is fixed/ a workaround is found
 728                         if (
 729                                 $this->mTitle->getNamespace() == NS_USER &&
 730                                 preg_match('/\\/[\\w]+\\.(css|js)$/', $this->mTitle->getDBkey())
 731                         ) {
 732                                 $wgOut->addWikiText( wfMsg('clearyourcache'));
 733                                 $wgOut->addHTML( '<pre>'.htmlspecialchars($this->mContent)."\n</pre>" );
 734                         } else if ( $rt = Title::newFromRedirect( $text ) ) {
 735                                 # Display redirect
 736                                 $imageUrl = "$wgStylePath/images/redirect.png";
 737                                 $targetUrl = $rt->escapeLocalURL();
 738                                 $titleText = htmlspecialchars( $rt->getPrefixedText() );
 739                                 $link = $sk->makeLinkObj( $rt );
 740                                 $wgOut->addHTML( "<img valign=\"center\" src=\"$imageUrl\">" .
 741                                   "<span class=\"redirectText\">$link</span>" );
 742                         } else if ( $pcache ) {
 743                                 # Display content and save to parser cache
 744                                 $wgOut->addPrimaryWikiText( $text, $this );
 745                         } else {
 746                                 # Display content, don't attempt to save to parser cache
 747                                 $wgOut->addWikiText( $text );
 748                         }
 749                 }
 750                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 751                 # If we have been passed an &rcid= parameter, we want to give the user a
 752                 # chance to mark this new article as patrolled.
 753                 if ( $wgUseRCPatrol && !is_null ( $rcid ) && $rcid != 0 && $wgUser->getID() != 0 &&
 754                      ( $wgUser->isSysop() || !$wgOnlySysopsCanPatrol ) )
 755                 {
 756                         $wgOut->addHTML( wfMsg ( 'markaspatrolledlink',
 757                                 $sk->makeKnownLinkObj ( $this->mTitle, wfMsg ( 'markaspatrolledtext' ),
 758                                         "action=markpatrolled&rcid={$rcid}" )
 759                          ) );
 760                 }
 761
 762                 # Put link titles into the link cache
 763                 $wgOut->transformBuffer();
 764
 765                 # Add link titles as META keywords
 766                 $wgOut->addMetaTags() ;
 767
 768                 $this->viewUpdates();
 769                 wfProfileOut( $fname );
 770         }
 771
 772         # Theoretically we could defer these whole insert and update
 773         # functions for after display, but that's taking a big leap
 774         # of faith, and we want to be able to report database
 775         # errors at some point.
 776
 777         /* private */ function insertNewArticle( $text, $summary, $isminor, $watchthis ) {
 778                 global $wgOut, $wgUser, $wgMwRedir;
 779                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 780
 781                 $fname = 'Article::insertNewArticle';
 782
 783                 $this->mCountAdjustment = $this->isCountable( $text );
 784
 785                 $ns = $this->mTitle->getNamespace();
 786                 $ttl = $this->mTitle->getDBkey();
 787                 $text = $this->preSaveTransform( $text );
 788                 if ( $wgMwRedir->matchStart( $text ) ) { $redir = 1; }
 789                 else { $redir = 0; }
 790
 791                 $now = wfTimestampNow();
 792                 $won = wfInvertTimestamp( $now );
 793                 wfSeedRandom();
 794                 $rand = number_format( mt_rand() / mt_getrandmax(), 12, '.', '' );
 795                 $dbw =& wfGetDB( DB_MASTER );
 796
 797                 $cur_id = $dbw->nextSequenceValue( 'cur_cur_id_seq' );
 798
 799                 $isminor = ( $isminor && $wgUser->getID() ) ? 1 : 0;
 800
 801                 $dbw->insertArray( 'cur', array(
 802                         'cur_id' => $cur_id,
 803                         'cur_namespace' => $ns,
 804                         'cur_title' => $ttl,
 805                         'cur_text' => $text,
 806                         'cur_comment' => $summary,
 807                         'cur_user' => $wgUser->getID(),
 808                         'cur_timestamp' => $dbw->timestamp($now),
 809                         'cur_minor_edit' => $isminor,
 810                         'cur_counter' => 0,
 811                         'cur_restrictions' => '',
 812                         'cur_user_text' => $wgUser->getName(),
 813                         'cur_is_redirect' => $redir,
 814                         'cur_is_new' => 1,
 815                         'cur_random' => $rand,
 816                         'cur_touched' => $dbw->timestamp($now),
 817                         'inverse_timestamp' => $won,
 818                 ), $fname );
 819
 820                 $newid = $dbw->insertId();
 821                 $this->mTitle->resetArticleID( $newid );
 822
 823                 Article::onArticleCreate( $this->mTitle );
 824                 RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary );
 825
 826                 if ($watchthis) {
 827                         if(!$this->mTitle->userIsWatching()) $this->watch();
 828                 } else {
 829                         if ( $this->mTitle->userIsWatching() ) {
 830                                 $this->unwatch();
 831                         }
 832                 }
 833
 834                 # The talk page isn't in the regular link tables, so we need to update manually:
 835                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 836                 $dbw->updateArray( 'cur', array('cur_touched' => $dbw->timestamp($now) ),
 837                         array(  'cur_namespace' => $talkns, 'cur_title' => $ttl ), $fname );
 838
 839                 # standard deferred updates
 840                 $this->editUpdates( $text );
 841
 842                 $this->showArticle( $text, wfMsg( 'newarticle' ) );
 843         }
 844
 845
 846         /* Side effects: loads last edit */
 847         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = '') {
 848                 $this->loadLastEdit();
 849                 $oldtext = $this->getContent( true );
 850                 if ($section != '') {
 851                         if($section=='new') {
 852                                 if($summary) $subject="== {$summary} ==\n\n";
 853                                 $text=$oldtext."\n\n".$subject.$text;
 854                         } else {
 855
 856                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 857                                 # comments to be stripped as well)
 858                                 $striparray=array();
 859                                 $parser=new Parser();
 860                                 $parser->mOutputType=OT_WIKI;
 861                                 $oldtext=$parser->strip($oldtext, $striparray, true);
 862
 863                                 # now that we can be sure that no pseudo-sections are in the source,
 864                                 # split it up
 865                                 # Unfortunately we can't simply do a preg_replace because that might
 866                                 # replace the wrong section, so we have to use the section counter instead
 867                                 $secs=preg_split('/(^=+.*?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)/mi',
 868                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 869                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 870
 871                                 # section 0 is top (intro) section
 872                                 if($section!=0) {
 873
 874                                         # headline of old section - we need to go through this section
 875                                         # to determine if there are any subsections that now need to
 876                                         # be erased, as the mother section has been replaced with
 877                                         # the text of all subsections.
 878                                         $headline=$secs[$section*2-1];
 879                                         preg_match( '/^(=+).*?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>/mi',$headline,$matches);
 880                                         $hlevel=$matches[1];
 881
 882                                         # determine headline level for wikimarkup headings
 883                                         if(strpos($hlevel,'=')!==false) {
 884                                                 $hlevel=strlen($hlevel);
 885                                         }
 886
 887                                         $secs[$section*2-1]=''; // erase old headline
 888                                         $count=$section+1;
 889                                         $break=false;
 890                                         while(!empty($secs[$count*2-1]) && !$break) {
 891
 892                                                 $subheadline=$secs[$count*2-1];
 893                                                 preg_match(
 894                                                  '/^(=+).*?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>/mi',$subheadline,$matches);
 895                                                 $subhlevel=$matches[1];
 896                                                 if(strpos($subhlevel,'=')!==false) {
 897                                                         $subhlevel=strlen($subhlevel);
 898                                                 }
 899                                                 if($subhlevel > $hlevel) {
 900                                                         // erase old subsections
 901                                                         $secs[$count*2-1]='';
 902                                                         $secs[$count*2]='';
 903                                                 }
 904                                                 if($subhlevel <= $hlevel) {
 905                                                         $break=true;
 906                                                 }
 907                                                 $count++;
 908
 909                                         }
 910
 911                                 }
 912                                 $text=join('',$secs);
 913                                 # reinsert the stuff that we stripped out earlier
 914                                 $text=$parser->unstrip($text,$striparray);
 915                                 $text=$parser->unstripNoWiki($text,$striparray);
 916                         }
 917
 918                 }
 919                 return $text;
 920         }
 921
 922         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
 923                 global $wgOut, $wgUser;
 924                 global $wgDBtransactions, $wgMwRedir;
 925                 global $wgUseSquid, $wgInternalServer;
 926
 927                 $fname = 'Article::updateArticle';
 928                 $good = true;
 929
 930                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
 931                 if ( $minor && $wgUser->getID() ) { $me2 = 1; } else { $me2 = 0; }
 932                 if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ')[^\\n]+)/i', $text, $m ) ) {
 933                         $redir = 1;
 934                         $text = $m[1] . "\n"; # Remove all content but redirect
 935                 }
 936                 else { $redir = 0; }
 937
 938                 $text = $this->preSaveTransform( $text );
 939                 $dbw =& wfGetDB( DB_MASTER );
 940
 941                 # Update article, but only if changed.
 942
 943                 # It's important that we either rollback or complete, otherwise an attacker could
 944                 # overwrite cur entries by sending precisely timed user aborts. Random bored users
 945                 # could conceivably have the same effect, especially if cur is locked for long periods.
 946                 if( $wgDBtransactions ) {
 947                         $dbw->query( 'BEGIN', $fname );
 948                 } else {
 949                         $userAbort = ignore_user_abort( true );
 950                 }
 951
 952                 $oldtext = $this->getContent( true );
 953
 954                 if ( 0 != strcmp( $text, $oldtext ) ) {
 955                         $this->mCountAdjustment = $this->isCountable( $text )
 956                           - $this->isCountable( $oldtext );
 957                         $now = wfTimestampNow();
 958                         $won = wfInvertTimestamp( $now );
 959
 960                         # First update the cur row
 961                         $dbw->updateArray( 'cur',
 962                                 array( /* SET */
 963                                         'cur_text' => $text,
 964                                         'cur_comment' => $summary,
 965                                         'cur_minor_edit' => $me2,
 966                                         'cur_user' => $wgUser->getID(),
 967                                         'cur_timestamp' => $dbw->timestamp($now),
 968                                         'cur_user_text' => $wgUser->getName(),
 969                                         'cur_is_redirect' => $redir,
 970                                         'cur_is_new' => 0,
 971                                         'cur_touched' => $dbw->timestamp($now),
 972                                         'inverse_timestamp' => $won
 973                                 ), array( /* WHERE */
 974                                         'cur_id' => $this->getID(),
 975                                         'cur_timestamp' => $dbw->timestamp($this->getTimestamp())
 976                                 ), $fname
 977                         );
 978
 979                         if( $dbw->affectedRows() == 0 ) {
 980                                 /* Belated edit conflict! Run away!! */
 981                                 $good = false;
 982                         } else {
 983                                 # Now insert the previous revision into old
 984
 985                                 # This overwrites $oldtext if revision compression is on
 986                                 $flags = Article::compressRevisionText( $oldtext );
 987
 988                                 $dbw->insertArray( 'old',
 989                                         array(
 990                                                 'old_id' => $dbw->nextSequenceValue( 'old_old_id_seq' ),
 991                                                 'old_namespace' => $this->mTitle->getNamespace(),
 992                                                 'old_title' => $this->mTitle->getDBkey(),
 993                                                 'old_text' => $oldtext,
 994                                                 'old_comment' => $this->getComment(),
 995                                                 'old_user' => $this->getUser(),
 996                                                 'old_user_text' => $this->getUserText(),
 997                                                 'old_timestamp' => $dbw->timestamp($this->getTimestamp()),
 998                                                 'old_minor_edit' => $me1,
 999                                                 'inverse_timestamp' => wfInvertTimestamp( $this->getTimestamp() ),
1000                                                 'old_flags' => $flags,
1001                                         ), $fname
1002                                 );
1003
1004                                 $oldid = $dbw->insertId();
1005
1006                                 $bot = (int)($wgUser->isBot() || $forceBot);
1007                                 RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
1008                                         $oldid, $this->getTimestamp(), $bot );
1009                                 Article::onArticleEdit( $this->mTitle );
1010                         }
1011                 }
1012
1013                 if( $wgDBtransactions ) {
1014                         $dbw->query( 'COMMIT', $fname );
1015                 } else {
1016                         ignore_user_abort( $userAbort );
1017                 }
1018
1019                 if ( $good ) {
1020                 if ($watchthis) {
1021                         if (!$this->mTitle->userIsWatching()) $this->watch();
1022                 } else {
1023                         if ( $this->mTitle->userIsWatching() ) {
1024                                 $this->unwatch();
1025                         }
1026                 }
1027                 # standard deferred updates
1028                 $this->editUpdates( $text );
1029
1030
1031                 $urls = array();
1032                 # Template namespace
1033                 # Purge all articles linking here
1034                 if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
1035                         $titles = $this->mTitle->getLinksTo();
1036                         Title::touchArray( $titles );
1037                         if ( $wgUseSquid ) {
1038                                         foreach ( $titles as $title ) {
1039                                                 $urls[] = $title->getInternalURL();
1040                                         }
1041                         }
1042                 }
1043
1044                 # Squid updates
1045                 if ( $wgUseSquid ) {
1046                         $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
1047                         $u = new SquidUpdate( $urls );
1048                         $u->doUpdate();
1049                 }
1050
1051                 $this->showArticle( $text, wfMsg( 'updated' ), $sectionanchor );
1052                 }
1053                 return $good;
1054         }
1055
1056         # After we've either updated or inserted the article, update
1057         # the link tables and redirect to the new page.
1058
1059         function showArticle( $text, $subtitle , $sectionanchor = '' ) {
1060                 global $wgOut, $wgUser, $wgLinkCache;
1061                 global $wgMwRedir;
1062
1063                 $wgLinkCache = new LinkCache();
1064                 # Select for update
1065                 $wgLinkCache->forUpdate( true );
1066
1067                 # Get old version of link table to allow incremental link updates
1068                 $wgLinkCache->preFill( $this->mTitle );
1069                 $wgLinkCache->clear();
1070
1071                 # Parse the text and replace links with placeholders
1072                 $wgOut = new OutputPage();
1073                 $wgOut->addWikiText( $text );
1074
1075                 # Look up the links in the DB and add them to the link cache
1076                 $wgOut->transformBuffer( RLH_FOR_UPDATE );
1077
1078                 if( $wgMwRedir->matchStart( $text ) )
1079                         $r = 'redirect=no';
1080                 else
1081                         $r = '';
1082                 $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
1083         }
1084
1085         # Validate article
1086
1087         function validate () {
1088                 global $wgOut, $wgUseValidation;
1089                 if( $wgUseValidation ) {
1090                         $wgOut->setPagetitle( wfMsg( 'validate' ) . ": " . $this->mTitle->getPrefixedText() );
1091                         $wgOut->setRobotpolicy( 'noindex,follow' );
1092                         if( $this->mTitle->getNamespace() != 0 ) {
1093                                 $wgOut->addHTML( wfMsg( 'val_validate_article_namespace_only' ) );
1094                                 return;
1095                         }
1096                         $v = new Validation;
1097                         $v->validate_form( $this->mTitle->getDBkey() );
1098                 } else {
1099                         $wgOut->errorpage( "nosuchaction", "nosuchactiontext" );
1100                 }
1101         }
1102
1103         # Mark this particular edit as patrolled
1104         function markpatrolled() {
1105                 global $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgUseRCPatrol, $wgUser;
1106                 $wgOut->setRobotpolicy( 'noindex,follow' );
1107
1108                 if ( !$wgUseRCPatrol )
1109                 {
1110                         $wgOut->errorpage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1111                         return;
1112                 }
1113                 if ( $wgUser->getID() == 0 )
1114                 {
1115                         $wgOut->loginToUse();
1116                         return;
1117                 }
1118                 if ( $wgOnlySysopsCanPatrol && !$wgUser->isSysop() )
1119                 {
1120                         $wgOut->sysopRequired();
1121                         return;
1122                 }
1123                 $rcid = $wgRequest->getVal( 'rcid' );
1124                 if ( !is_null ( $rcid ) )
1125                 {
1126                         RecentChange::markPatrolled( $rcid );
1127                         $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
1128                         $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
1129                         $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1130                 }
1131                 else
1132                 {
1133                         $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1134                 }
1135         }
1136
1137
1138         # Add this page to my watchlist
1139
1140         function watch( $add = true ) {
1141                 global $wgUser, $wgOut, $wgLang;
1142                 global $wgDeferredUpdateList;
1143
1144                 if ( 0 == $wgUser->getID() ) {
1145                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1146                         return;
1147                 }
1148                 if ( wfReadOnly() ) {
1149                         $wgOut->readOnlyPage();
1150                         return;
1151                 }
1152                 if( $add )
1153                         $wgUser->addWatch( $this->mTitle );
1154                 else
1155                         $wgUser->removeWatch( $this->mTitle );
1156
1157                 $wgOut->setPagetitle( wfMsg( $add ? 'addedwatch' : 'removedwatch' ) );
1158                 $wgOut->setRobotpolicy( 'noindex,follow' );
1159
1160                 $sk = $wgUser->getSkin() ;
1161                 $link = $this->mTitle->getPrefixedText();
1162
1163                 if($add)
1164                         $text = wfMsg( 'addedwatchtext', $link );
1165                 else
1166                         $text = wfMsg( 'removedwatchtext', $link );
1167                 $wgOut->addWikiText( $text );
1168
1169                 $up = new UserUpdate();
1170                 array_push( $wgDeferredUpdateList, $up );
1171
1172                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1173         }
1174
1175         function unwatch() {
1176                 $this->watch( false );
1177         }
1178
1179         # protect a page
1180
1181         function protect( $limit = 'sysop' ) {
1182                 global $wgUser, $wgOut, $wgRequest;
1183
1184                 if ( ! $wgUser->isSysop() ) {
1185                         $wgOut->sysopRequired();
1186                         return;
1187                 }
1188                 if ( wfReadOnly() ) {
1189                         $wgOut->readOnlyPage();
1190                         return;
1191                 }
1192                 $id = $this->mTitle->getArticleID();
1193                 if ( 0 == $id ) {
1194                         $wgOut->fatalError( wfMsg( 'badarticleerror' ) );
1195                         return;
1196                 }
1197
1198                 $confirm = $wgRequest->getBool( 'wpConfirmProtect' ) && $wgRequest->wasPosted();
1199                 $reason = $wgRequest->getText( 'wpReasonProtect' );
1200
1201                 if ( $confirm ) {
1202                         $dbw =& wfGetDB( DB_MASTER );
1203                         $dbw->updateArray( 'cur',
1204                                 array( /* SET */
1205                                         'cur_touched' => $dbw->timestamp(),
1206                                         'cur_restrictions' => (string)$limit
1207                                 ), array( /* WHERE */
1208                                         'cur_id' => $id
1209                                 ), 'Article::protect'
1210                         );
1211
1212                         $log = new LogPage( wfMsg( 'protectlogpage' ), wfMsg( 'protectlogtext' ) );
1213                         if ( $limit === "" ) {
1214                                         $log->addEntry( wfMsg( 'unprotectedarticle', $this->mTitle->getPrefixedText() ), $reason );
1215                         } else {
1216                                         $log->addEntry( wfMsg( 'protectedarticle', $this->mTitle->getPrefixedText() ), $reason );
1217                         }
1218                         $wgOut->redirect( $this->mTitle->getFullURL() );
1219                         return;
1220                 } else {
1221                         $reason = htmlspecialchars( wfMsg( 'protectreason' ) );
1222                         return $this->confirmProtect( '', $reason, $limit );
1223                 }
1224         }
1225
1226         # Output protection confirmation dialog
1227
1228         function confirmProtect( $par, $reason, $limit = 'sysop'  ) {
1229                 global $wgOut;
1230
1231                 wfDebug( "Article::confirmProtect\n" );
1232
1233                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1234                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1235
1236                 $check = '';
1237                 $protcom = '';
1238
1239                 if ( $limit === '' ) {
1240                         $wgOut->setPageTitle( wfMsg( 'confirmunprotect' ) );
1241                         $wgOut->setSubtitle( wfMsg( 'unprotectsub', $sub ) );
1242                         $wgOut->addWikiText( wfMsg( 'confirmunprotecttext' ) );
1243                         $check = htmlspecialchars( wfMsg( 'confirmunprotect' ) );
1244                         $protcom = htmlspecialchars( wfMsg( 'unprotectcomment' ) );
1245                         $formaction = $this->mTitle->escapeLocalURL( 'action=unprotect' . $par );
1246                 } else {
1247                         $wgOut->setPageTitle( wfMsg( 'confirmprotect' ) );
1248                         $wgOut->setSubtitle( wfMsg( 'protectsub', $sub ) );
1249                         $wgOut->addWikiText( wfMsg( 'confirmprotecttext' ) );
1250                         $check = htmlspecialchars( wfMsg( 'confirmprotect' ) );
1251                         $protcom = htmlspecialchars( wfMsg( 'protectcomment' ) );
1252                         $formaction = $this->mTitle->escapeLocalURL( 'action=protect' . $par );
1253                 }
1254
1255                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1256
1257                 $wgOut->addHTML( "
1258 <form id='protectconfirm' method='post' action=\"{$formaction}\">
1259         <table border='0'>
1260                 <tr>
1261                         <td align='right'>
1262                                 <label for='wpReasonProtect'>{$protcom}:</label>
1263                         </td>
1264                         <td align='left'>
1265                                 <input type='text' size='60' name='wpReasonProtect' id='wpReasonProtect' value=\"" . htmlspecialchars( $reason ) . "\" />
1266                         </td>
1267                 </tr>
1268                 <tr>
1269                         <td>&nbsp;</td>
1270                 </tr>
1271                 <tr>
1272                         <td align='right'>
1273                                 <input type='checkbox' name='wpConfirmProtect' value='1' id='wpConfirmProtect' />
1274                         </td>
1275                         <td>
1276                                 <label for='wpConfirmProtect'>{$check}</label>
1277                         </td>
1278                 </tr>
1279                 <tr>
1280                         <td>&nbsp;</td>
1281                         <td>
1282                                 <input type='submit' name='wpConfirmProtectB' value=\"{$confirm}\" />
1283                         </td>
1284                 </tr>
1285         </table>
1286 </form>\n" );
1287
1288                 $wgOut->returnToMain( false );
1289         }
1290
1291         function unprotect() {
1292                 return $this->protect( '' );
1293         }
1294
1295         # UI entry point for page deletion
1296
1297         function delete() {
1298                 global $wgUser, $wgOut, $wgMessageCache, $wgRequest;
1299                 $fname = 'Article::delete';
1300                 $confirm = $wgRequest->getBool( 'wpConfirm' ) && $wgRequest->wasPosted();
1301                 $reason = $wgRequest->getText( 'wpReason' );
1302
1303                 # This code desperately needs to be totally rewritten
1304
1305                 # Check permissions
1306                 if ( ( ! $wgUser->isSysop() ) ) {
1307                         $wgOut->sysopRequired();
1308                         return;
1309                 }
1310                 if ( wfReadOnly() ) {
1311                         $wgOut->readOnlyPage();
1312                         return;
1313                 }
1314
1315                 # Better double-check that it hasn't been deleted yet!
1316                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1317                 if ( ( '' == trim( $this->mTitle->getText() ) )
1318                   or ( $this->mTitle->getArticleId() == 0 ) ) {
1319                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1320                         return;
1321                 }
1322
1323                 if ( $confirm ) {
1324                         $this->doDelete( $reason );
1325                         return;
1326                 }
1327
1328                 # determine whether this page has earlier revisions
1329                 # and insert a warning if it does
1330                 # we select the text because it might be useful below
1331                 $dbr =& $this->getDB();
1332                 $ns = $this->mTitle->getNamespace();
1333                 $title = $this->mTitle->getDBkey();
1334                 $old = $dbr->getArray( 'old',
1335                         array( 'old_text', 'old_flags' ),
1336                         array(
1337                                 'old_namespace' => $ns,
1338                                 'old_title' => $title,
1339                         ), $fname, $this->getSelectOptions( array( 'ORDER BY' => 'inverse_timestamp' ) )
1340                 );
1341
1342                 if( $old !== false && !$confirm ) {
1343                         $skin=$wgUser->getSkin();
1344                         $wgOut->addHTML('<b>'.wfMsg('historywarning'));
1345                         $wgOut->addHTML( $skin->historyLink() .'</b>');
1346                 }
1347
1348                 # Fetch cur_text
1349                 $s = $dbr->getArray( 'cur',
1350                         array( 'cur_text' ),
1351                         array(
1352                                 'cur_namespace' => $ns,
1353                                 'cur_title' => $title,
1354                         ), $fname, $this->getSelectOptions()
1355                 );
1356
1357                 if( $s !== false ) {
1358                         # if this is a mini-text, we can paste part of it into the deletion reason
1359
1360                         #if this is empty, an earlier revision may contain "useful" text
1361                         $blanked = false;
1362                         if($s->cur_text != '') {
1363                                 $text=$s->cur_text;
1364                         } else {
1365                                 if($old) {
1366                                         $text = Article::getRevisionText( $old );
1367                                         $blanked = true;
1368                                 }
1369
1370                         }
1371
1372                         $length=strlen($text);
1373
1374                         # this should not happen, since it is not possible to store an empty, new
1375                         # page. Let's insert a standard text in case it does, though
1376                         if($length == 0 && $reason === '') {
1377                                 $reason = wfMsg('exblank');
1378                         }
1379
1380                         if($length < 500 && $reason === '') {
1381
1382                                 # comment field=255, let's grep the first 150 to have some user
1383                                 # space left
1384                                 $text=substr($text,0,150);
1385                                 # let's strip out newlines and HTML tags
1386                                 $text=preg_replace('/\"/',"'",$text);
1387                                 $text=preg_replace('/\</','&lt;',$text);
1388                                 $text=preg_replace('/\>/','&gt;',$text);
1389                                 $text=preg_replace("/[\n\r]/",'',$text);
1390                                 if(!$blanked) {
1391                                         $reason=wfMsg('excontent'). " '".$text;
1392                                 } else {
1393                                         $reason=wfMsg('exbeforeblank') . " '".$text;
1394                                 }
1395                                 if($length>150) { $reason .= '...'; } # we've only pasted part of the text
1396                                 $reason.="'";
1397                         }
1398                 }
1399
1400                 return $this->confirmDelete( '', $reason );
1401         }
1402
1403         # Output deletion confirmation dialog
1404
1405         function confirmDelete( $par, $reason ) {
1406                 global $wgOut;
1407
1408                 wfDebug( "Article::confirmDelete\n" );
1409
1410                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1411                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1412                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1413                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1414
1415                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1416
1417                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1418                 $check = htmlspecialchars( wfMsg( 'confirmcheck' ) );
1419                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1420
1421                 $wgOut->addHTML( "
1422 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1423         <table border='0'>
1424                 <tr>
1425                         <td align='right'>
1426                                 <label for='wpReason'>{$delcom}:</label>
1427                         </td>
1428                         <td align='left'>
1429                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1430                         </td>
1431                 </tr>
1432                 <tr>
1433                         <td>&nbsp;</td>
1434                 </tr>
1435                 <tr>
1436                         <td align='right'>
1437                                 <input type='checkbox' name='wpConfirm' value='1' id='wpConfirm' />
1438                         </td>
1439                         <td>
1440                                 <label for='wpConfirm'>{$check}</label>
1441                         </td>
1442                 </tr>
1443                 <tr>
1444                         <td>&nbsp;</td>
1445                         <td>
1446                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1447                         </td>
1448                 </tr>
1449         </table>
1450 </form>\n" );
1451
1452                 $wgOut->returnToMain( false );
1453         }
1454
1455
1456         # Perform a deletion and output success or failure messages
1457
1458         function doDelete( $reason ) {
1459                 global $wgOut, $wgUser, $wgLang;
1460                 $fname = 'Article::doDelete';
1461                 wfDebug( "$fname\n" );
1462
1463                 if ( $this->doDeleteArticle( $reason ) ) {
1464                         $deleted = $this->mTitle->getPrefixedText();
1465
1466                         $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1467                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
1468
1469                         $sk = $wgUser->getSkin();
1470                         $loglink = $sk->makeKnownLink( $wgLang->getNsText( NS_WIKIPEDIA ) .
1471                           ':' . wfMsg( 'dellogpage' ), wfMsg( 'deletionlog' ) );
1472
1473                         $text = wfMsg( "deletedtext", $deleted, $loglink );
1474
1475                         $wgOut->addHTML( '<p>' . $text . "</p>\n" );
1476                         $wgOut->returnToMain( false );
1477                 } else {
1478                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1479                 }
1480         }
1481
1482         # Back-end article deletion
1483         # Deletes the article with database consistency, writes logs, purges caches
1484         # Returns success
1485         function doDeleteArticle( $reason ) {
1486                 global $wgUser, $wgLang;
1487                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
1488
1489                 $fname = 'Article::doDeleteArticle';
1490                 wfDebug( $fname."\n" );
1491
1492                 $dbw =& wfGetDB( DB_MASTER );
1493                 $ns = $this->mTitle->getNamespace();
1494                 $t = $this->mTitle->getDBkey();
1495                 $id = $this->mTitle->getArticleID();
1496
1497                 if ( $t == '' || $id == 0 ) {
1498                         return false;
1499                 }
1500
1501                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
1502                 array_push( $wgDeferredUpdateList, $u );
1503
1504                 $linksTo = $this->mTitle->getLinksTo();
1505
1506                 # Squid purging
1507                 if ( $wgUseSquid ) {
1508                         $urls = array(
1509                                 $this->mTitle->getInternalURL(),
1510                                 $this->mTitle->getInternalURL( 'history' )
1511                         );
1512                         foreach ( $linksTo as $linkTo ) {
1513                                 $urls[] = $linkTo->getInternalURL();
1514                         }
1515
1516                         $u = new SquidUpdate( $urls );
1517                         array_push( $wgDeferredUpdateList, $u );
1518
1519                 }
1520
1521                 # Client and file cache invalidation
1522                 Title::touchArray( $linksTo );
1523
1524                 # Move article and history to the "archive" table
1525                 $archiveTable = $dbw->tableName( 'archive' );
1526                 $oldTable = $dbw->tableName( 'old' );
1527                 $curTable = $dbw->tableName( 'cur' );
1528                 $recentchangesTable = $dbw->tableName( 'recentchanges' );
1529                 $linksTable = $dbw->tableName( 'links' );
1530                 $brokenlinksTable = $dbw->tableName( 'brokenlinks' );
1531
1532                 $dbw->insertSelect( 'archive', 'cur',
1533                         array(
1534                                 'ar_namespace' => 'cur_namespace',
1535                                 'ar_title' => 'cur_title',
1536                                 'ar_text' => 'cur_text',
1537                                 'ar_comment' => 'cur_comment',
1538                                 'ar_user' => 'cur_user',
1539                                 'ar_user_text' => 'cur_user_text',
1540                                 'ar_timestamp' => 'cur_timestamp',
1541                                 'ar_minor_edit' => 'cur_minor_edit',
1542                                 'ar_flags' => 0,
1543                         ), array(
1544                                 'cur_namespace' => $ns,
1545                                 'cur_title' => $t,
1546                         ), $fname
1547                 );
1548
1549                 $dbw->insertSelect( 'archive', 'old',
1550                         array(
1551                                 'ar_namespace' => 'old_namespace',
1552                                 'ar_title' => 'old_title',
1553                                 'ar_text' => 'old_text',
1554                                 'ar_comment' => 'old_comment',
1555                                 'ar_user' => 'old_user',
1556                                 'ar_user_text' => 'old_user_text',
1557                                 'ar_timestamp' => 'old_timestamp',
1558                                 'ar_minor_edit' => 'old_minor_edit',
1559                                 'ar_flags' => 'old_flags'
1560                         ), array(
1561                                 'old_namespace' => $ns,
1562                                 'old_title' => $t,
1563                         ), $fname
1564                 );
1565
1566                 # Now that it's safely backed up, delete it
1567
1568                 $dbw->delete( 'cur', array( 'cur_namespace' => $ns, 'cur_title' => $t ), $fname );
1569                 $dbw->delete( 'old', array( 'old_namespace' => $ns, 'old_title' => $t ), $fname );
1570                 $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), $fname );
1571
1572                 # Finally, clean up the link tables
1573                 $t = $this->mTitle->getPrefixedDBkey();
1574
1575                 Article::onArticleDelete( $this->mTitle );
1576
1577                 # Insert broken links
1578                 $brokenLinks = array();
1579                 foreach ( $linksTo as $titleObj ) {
1580                         # Get article ID. Efficient because it was loaded into the cache by getLinksTo().
1581                         $linkID = $titleObj->getArticleID();
1582                         $brokenLinks[] = array( 'bl_from' => $linkID, 'bl_to' => $t );
1583                 }
1584                 $dbw->insert( 'brokenlinks', $brokenLinks, $fname, 'IGNORE' );
1585
1586                 # Delete live links
1587                 $dbw->delete( 'links', array( 'l_to' => $id ) );
1588                 $dbw->delete( 'links', array( 'l_from' => $id ) );
1589                 $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
1590                 $dbw->delete( 'brokenlinks', array( 'bl_from' => $id ) );
1591                 $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
1592
1593                 # Log the deletion
1594                 $log = new LogPage( wfMsg( 'dellogpage' ), wfMsg( 'dellogpagetext' ) );
1595                 $art = $this->mTitle->getPrefixedText();
1596                 $log->addEntry( wfMsg( 'deletedarticle', $art ), $reason );
1597
1598                 # Clear the cached article id so the interface doesn't act like we exist
1599                 $this->mTitle->resetArticleID( 0 );
1600                 $this->mTitle->mArticleID = 0;
1601                 return true;
1602         }
1603
1604         function rollback() {
1605                 global $wgUser, $wgLang, $wgOut, $wgRequest;
1606                 $fname = "Article::rollback";
1607
1608                 if ( ! $wgUser->isSysop() ) {
1609                         $wgOut->sysopRequired();
1610                         return;
1611                 }
1612                 if ( wfReadOnly() ) {
1613                         $wgOut->readOnlyPage( $this->getContent( true ) );
1614                         return;
1615                 }
1616                 $dbw =& wfGetDB( DB_MASTER );
1617
1618                 # Enhanced rollback, marks edits rc_bot=1
1619                 $bot = $wgRequest->getBool( 'bot' );
1620
1621                 # Replace all this user's current edits with the next one down
1622                 $tt = $this->mTitle->getDBKey();
1623                 $n = $this->mTitle->getNamespace();
1624
1625                 # Get the last editor, lock table exclusively
1626                 $s = $dbw->getArray( 'cur',
1627                         array( 'cur_id','cur_user','cur_user_text','cur_comment' ),
1628                         array( 'cur_title' => $tt, 'cur_namespace' => $n ),
1629                         $fname, 'FOR UPDATE'
1630                 );
1631                 if( $s === false ) {
1632                         # Something wrong
1633                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
1634                         return;
1635                 }
1636                 $ut = $dbw->strencode( $s->cur_user_text );
1637                 $uid = $s->cur_user;
1638                 $pid = $s->cur_id;
1639
1640                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
1641                 if( $from != $s->cur_user_text ) {
1642                         $wgOut->setPageTitle(wfmsg('rollbackfailed'));
1643                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
1644                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
1645                                 htmlspecialchars( $from ),
1646                                 htmlspecialchars( $s->cur_user_text ) ) );
1647                         if($s->cur_comment != '') {
1648                                 $wgOut->addHTML(
1649                                         wfMsg('editcomment',
1650                                         htmlspecialchars( $s->cur_comment ) ) );
1651                         }
1652                         return;
1653                 }
1654
1655                 # Get the last edit not by this guy
1656                 $s = $dbw->getArray( 'old',
1657                         array( 'old_text','old_user','old_user_text','old_timestamp','old_flags' ),
1658                         array(
1659                                 'old_namespace' => $n,
1660                                 'old_title' => $tt,
1661                                 "old_user <> {$uid} OR old_user_text <> '{$ut}'"
1662                         ), $fname, array( 'FOR UPDATE', 'USE INDEX' => 'name_title_timestamp' )
1663                 );
1664                 if( $s === false ) {
1665                         # Something wrong
1666                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
1667                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
1668                         return;
1669                 }
1670
1671                 if ( $bot ) {
1672                         # Mark all reverted edits as bot
1673                         $dbw->updateArray( 'recentchanges',
1674                                 array( /* SET */
1675                                         'rc_bot' => 1
1676                                 ), array( /* WHERE */
1677                                         'rc_user' => $uid,
1678                                         "rc_timestamp > '{$s->old_timestamp}'",
1679                                 ), $fname
1680                         );
1681                 }
1682
1683                 # Save it!
1684                 $newcomment = wfMsg( 'revertpage', $s->old_user_text, $from );
1685                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1686                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1687                 $wgOut->addHTML( '<h2>' . $newcomment . "</h2>\n<hr />\n" );
1688                 $this->updateArticle( Article::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1689                 Article::onArticleEdit( $this->mTitle );
1690                 $wgOut->returnToMain( false );
1691         }
1692
1693
1694         # Do standard deferred updates after page view
1695
1696         /* private */ function viewUpdates() {
1697                 global $wgDeferredUpdateList;
1698                 if ( 0 != $this->getID() ) {
1699                         global $wgDisableCounters;
1700                         if( !$wgDisableCounters ) {
1701                                 Article::incViewCount( $this->getID() );
1702                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1703                                 array_push( $wgDeferredUpdateList, $u );
1704                         }
1705                 }
1706                 $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(),
1707                   $this->mTitle->getDBkey() );
1708                 array_push( $wgDeferredUpdateList, $u );
1709         }
1710
1711         # Do standard deferred updates after page edit.
1712         # Every 1000th edit, prune the recent changes table.
1713
1714         /* private */ function editUpdates( $text ) {
1715                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1716                 global $wgMessageCache;
1717
1718                 wfSeedRandom();
1719                 if ( 0 == mt_rand( 0, 999 ) ) {
1720                         $dbw =& wfGetDB( DB_MASTER );
1721                         $cutoff = wfUnix2Timestamp( time() - ( 7 * 86400 ) );
1722                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1723                         $dbw->query( $sql );
1724                 }
1725                 $id = $this->getID();
1726                 $title = $this->mTitle->getPrefixedDBkey();
1727                 $shortTitle = $this->mTitle->getDBkey();
1728
1729                 $adj = $this->mCountAdjustment;
1730
1731                 if ( 0 != $id ) {
1732                         $u = new LinksUpdate( $id, $title );
1733                         array_push( $wgDeferredUpdateList, $u );
1734                         $u = new SiteStatsUpdate( 0, 1, $adj );
1735                         array_push( $wgDeferredUpdateList, $u );
1736                         $u = new SearchUpdate( $id, $title, $text );
1737                         array_push( $wgDeferredUpdateList, $u );
1738
1739                         $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle );
1740                         array_push( $wgDeferredUpdateList, $u );
1741
1742                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1743                                 $wgMessageCache->replace( $shortTitle, $text );
1744                         }
1745                 }
1746         }
1747
1748         /* private */ function setOldSubtitle() {
1749                 global $wgLang, $wgOut;
1750
1751                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1752                 $r = wfMsg( 'revisionasof', $td );
1753                 $wgOut->setSubtitle( "({$r})" );
1754         }
1755
1756         # This function is called right before saving the wikitext,
1757         # so we can do things like signatures and links-in-context.
1758
1759         function preSaveTransform( $text ) {
1760                 global $wgParser, $wgUser;
1761                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
1762         }
1763
1764         /* Caching functions */
1765
1766         # checkLastModified returns true if it has taken care of all
1767         # output to the client that is necessary for this request.
1768         # (that is, it has sent a cached version of the page)
1769         function tryFileCache() {
1770                 static $called = false;
1771                 if( $called ) {
1772                         wfDebug( " tryFileCache() -- called twice!?\n" );
1773                         return;
1774                 }
1775                 $called = true;
1776                 if($this->isFileCacheable()) {
1777                         $touched = $this->mTouched;
1778                         if( $this->mTitle->getPrefixedDBkey() == wfMsg( 'mainpage' ) ) {
1779                                 # Expire the main page quicker
1780                                 $expire = wfUnix2Timestamp( time() - 3600 );
1781                                 $touched = max( $expire, $touched );
1782                         }
1783                         $cache = new CacheManager( $this->mTitle );
1784                         if($cache->isFileCacheGood( $touched )) {
1785                                 global $wgOut;
1786                                 wfDebug( " tryFileCache() - about to load\n" );
1787                                 $cache->loadFromFileCache();
1788                                 return true;
1789                         } else {
1790                                 wfDebug( " tryFileCache() - starting buffer\n" );
1791                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1792                         }
1793                 } else {
1794                         wfDebug( " tryFileCache() - not cacheable\n" );
1795                 }
1796         }
1797
1798         function isFileCacheable() {
1799                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
1800                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
1801
1802                 return $wgUseFileCache
1803                         and (!$wgShowIPinHeader)
1804                         and ($this->getID() != 0)
1805                         and ($wgUser->getId() == 0)
1806                         and (!$wgUser->getNewtalk())
1807                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
1808                         and (empty( $action ) || $action == 'view')
1809                         and (!isset($oldid))
1810                         and (!isset($diff))
1811                         and (!isset($redirect))
1812                         and (!isset($printable))
1813                         and (!$this->mRedirectedFrom);
1814         }
1815
1816         # Loads cur_touched and returns a value indicating if it should be used
1817         function checkTouched() {
1818                 $fname = 'Article::checkTouched';
1819                 $id = $this->getID();
1820                 $dbr =& $this->getDB();
1821                 $s = $dbr->getArray( 'cur', array( 'cur_touched', 'cur_is_redirect' ),
1822                         array( 'cur_id' => $id ), $fname, $this->getSelectOptions() );
1823                 if( $s !== false ) {
1824                         $this->mTouched = wfTimestamp(TS_MW,$s->cur_touched);
1825                         return !$s->cur_is_redirect;
1826                 } else {
1827                         return false;
1828                 }
1829         }
1830
1831         # Edit an article without doing all that other stuff
1832         function quickEdit( $text, $comment = '', $minor = 0 ) {
1833                 global $wgUser, $wgMwRedir;
1834                 $fname = 'Article::quickEdit';
1835                 wfProfileIn( $fname );
1836
1837                 $dbw =& wfGetDB( DB_MASTER );
1838                 $ns = $this->mTitle->getNamespace();
1839                 $dbkey = $this->mTitle->getDBkey();
1840                 $encDbKey = $dbw->strencode( $dbkey );
1841                 $timestamp = wfTimestampNow();
1842
1843                 # Save to history
1844                 $dbw->insertSelect( 'old', 'cur',
1845                         array(
1846                                 'old_namespace' => 'cur_namespace',
1847                                 'old_title' => 'cur_title',
1848                                 'old_text' => 'cur_text',
1849                                 'old_comment' => 'cur_comment',
1850                                 'old_user' => 'cur_user',
1851                                 'old_user_text' => 'cur_user_text',
1852                                 'old_timestamp' => 'cur_timestamp',
1853                                 'inverse_timestamp' => '99999999999999-cur_timestamp',
1854                         ), array(
1855                                 'cur_namespace' => $ns,
1856                                 'cur_title' => $dbkey,
1857                         ), $fname
1858                 );
1859
1860                 # Use the affected row count to determine if the article is new
1861                 $numRows = $dbw->affectedRows();
1862
1863                 # Make an array of fields to be inserted
1864                 $fields = array(
1865                         'cur_text' => $text,
1866                         'cur_timestamp' => $timestamp,
1867                         'cur_user' => $wgUser->getID(),
1868                         'cur_user_text' => $wgUser->getName(),
1869                         'inverse_timestamp' => wfInvertTimestamp( $timestamp ),
1870                         'cur_comment' => $comment,
1871                         'cur_is_redirect' => $wgMwRedir->matchStart( $text ) ? 1 : 0,
1872                         'cur_minor_edit' => intval($minor),
1873                         'cur_touched' => $dbw->timestamp($timestamp),
1874                 );
1875
1876                 if ( $numRows ) {
1877                         # Update article
1878                         $fields['cur_is_new'] = 0;
1879                         $dbw->updateArray( 'cur', $fields, array( 'cur_namespace' => $ns, 'cur_title' => $dbkey ), $fname );
1880                 } else {
1881                         # Insert new article
1882                         $fields['cur_is_new'] = 1;
1883                         $fields['cur_namespace'] = $ns;
1884                         $fields['cur_title'] = $dbkey;
1885                         $fields['cur_random'] = $rand = number_format( mt_rand() / mt_getrandmax(), 12, '.', '' );
1886                         $dbw->insertArray( 'cur', $fields, $fname );
1887                 }
1888                 wfProfileOut( $fname );
1889         }
1890
1891         /* static */ function incViewCount( $id ) {
1892                 $id = intval( $id );
1893                 global $wgHitcounterUpdateFreq;
1894
1895                 $dbw =& wfGetDB( DB_MASTER );
1896                 $curTable = $dbw->tableName( 'cur' );
1897                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
1898                 $acchitsTable = $dbw->tableName( 'acchits' );
1899
1900                 if( $wgHitcounterUpdateFreq <= 1 ){ //
1901                         $dbw->query( "UPDATE $curTable SET cur_counter = cur_counter + 1 WHERE cur_id = $id" );
1902                         return;
1903                 }
1904
1905                 # Not important enough to warrant an error page in case of failure
1906                 $oldignore = $dbw->ignoreErrors( true );
1907
1908                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
1909
1910                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
1911                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
1912                         # Most of the time (or on SQL errors), skip row count check
1913                         $dbw->ignoreErrors( $oldignore );
1914                         return;
1915                 }
1916
1917                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
1918                 $row = $dbw->fetchObject( $res );
1919                 $rown = intval( $row->n );
1920                 if( $rown >= $wgHitcounterUpdateFreq ){
1921                         wfProfileIn( 'Article::incViewCount-collect' );
1922                         $old_user_abort = ignore_user_abort( true );
1923
1924                         $dbw->query("LOCK TABLES $hitcounterTable WRITE");
1925                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable TYPE=HEAP ".
1926                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
1927                                 'GROUP BY hc_id');
1928                         $dbw->query("DELETE FROM $hitcounterTable");
1929                         $dbw->query('UNLOCK TABLES');
1930                         $dbw->query("UPDATE $curTable,$acchitsTable SET cur_counter=cur_counter + hc_n ".
1931                                 'WHERE cur_id = hc_id');
1932                         $dbw->query("DROP TABLE $acchitsTable");
1933
1934                         ignore_user_abort( $old_user_abort );
1935                         wfProfileOut( 'Article::incViewCount-collect' );
1936                 }
1937                 $dbw->ignoreErrors( $oldignore );
1938         }
1939
1940         # The onArticle*() functions are supposed to be a kind of hooks
1941         # which should be called whenever any of the specified actions
1942         # are done.
1943         #
1944         # This is a good place to put code to clear caches, for instance.
1945
1946         # This is called on page move and undelete, as well as edit
1947         /* static */ function onArticleCreate($title_obj) {
1948                 global $wgUseSquid, $wgDeferredUpdateList;
1949
1950                 $titles = $title_obj->getBrokenLinksTo();
1951
1952                 # Purge squid
1953                 if ( $wgUseSquid ) {
1954                         $urls = $title_obj->getSquidURLs();
1955                         foreach ( $titles as $linkTitle ) {
1956                                 $urls[] = $linkTitle->getInternalURL();
1957                         }
1958                         $u = new SquidUpdate( $urls );
1959                         array_push( $wgDeferredUpdateList, $u );
1960                 }
1961
1962                 # Clear persistent link cache
1963                 LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
1964         }
1965
1966         /* static */ function onArticleDelete($title_obj) {
1967                 LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
1968         }
1969
1970         /* static */ function onArticleEdit($title_obj) {
1971                 LinkCache::linksccClearPage( $title_obj->getArticleID() );
1972         }
1973
1974
1975         # Info about this page
1976
1977         function info() {
1978                 global $wgUser, $wgTitle, $wgOut, $wgLang, $wgAllowPageInfo;
1979                 $fname = 'Article::info';
1980
1981                 if ( !$wgAllowPageInfo ) {
1982                         $wgOut->errorpage( "nosuchaction", "nosuchactiontext" );
1983                         return;
1984                 }
1985
1986                 $dbr =& $this->getDB();
1987
1988                 $basenamespace = $wgTitle->getNamespace() & (~1);
1989                 $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace );
1990                 $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace );
1991                 $wl_clause  = array( 'wl_title' => $wgTitle->getDBkey(), 'wl_namespace' => $basenamespace );
1992                 $fullTitle = $wgTitle->makeName($basenamespace, $wgTitle->getDBKey());
1993                 $wgOut->setPagetitle(  $fullTitle );
1994                 $wgOut->setSubtitle( wfMsg( "infosubtitle" ));
1995
1996                 # first, see if the page exists at all.
1997                 $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
1998                 if ($exists < 1) {
1999                         $wgOut->addHTML( wfMsg("noarticletext") );
2000                 } else {
2001                         $numwatchers = $dbr->selectField( 'watchlist', 'COUNT(*)', $wl_clause, $fname,
2002                                 $this->getSelectOptions() );
2003                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $numwatchers) . "</li>" );
2004                         $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2005                         $wgOut->addHTML( "<li>" . wfMsg("numedits", $old + 1) . "</li>");
2006
2007                         # to find number of distinct authors, we need to do some
2008                         # funny stuff because of the cur/old table split:
2009                         # - first, find the name of the 'cur' author
2010                         # - then, find the number of *other* authors in 'old'
2011
2012                         # find 'cur' author
2013                         $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2014                                 $this->getSelectOptions() );
2015
2016                         # find number of 'old' authors excluding 'cur' author
2017                         $authors = $dbr->selectField( 'old', 'COUNT(DISTINCT old_user_text)',
2018                                 $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ), $fname,
2019                                 $this->getSelectOptions() ) + 1;
2020
2021                         # now for the Talk page ...
2022                         $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace+1 );
2023                         $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace+1 );
2024
2025                         # does it exist?
2026                         $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2027
2028                         # number of edits
2029                         if ($exists > 0) {
2030                                 $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2031                                 $wgOut->addHTML( "<li>" . wfMsg("numtalkedits", $old + 1) . "</li>");
2032                         }
2033                         $wgOut->addHTML( "<li>" . wfMsg("numauthors", $authors) . "</li>" );
2034
2035                         # number of authors
2036                         if ($exists > 0) {
2037                                 $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2038                                         $this->getSelectOptions() );
2039                                 $authors = $dbr->selectField( 'cur', 'COUNT(DISTINCT old_user_text)',
2040                                         $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ),
2041                                         $fname, $this->getSelectOptions() );
2042
2043                                 $wgOut->addHTML( "<li>" . wfMsg("numtalkauthors", $authors) . "</li></ul>" );
2044                         }
2045                 }
2046         }
2047 }
2048
2049 ?>