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                                 # process if title object is valid and not special:userlogout
 375                                 if ( $rt && ! ( $rt->getNamespace() == NS_SPECIAL && $rt->getText() == 'Userlogout' ) ) {
 376                                         # Gotta hand redirects to special pages differently:
 377                                         # Fill the HTTP response "Location" header and ignore
 378                                         # the rest of the page we're on.
 379
 380                                         if ( $rt->getInterwiki() != '' ) {
 381                                                 $wgOut->redirect( $rt->getFullURL() ) ;
 382                                                 return;
 383                                         }
 384                                         if ( $rt->getNamespace() == NS_SPECIAL ) {
 385                                                 $wgOut->redirect( $rt->getFullURL() );
 386                                                 return;
 387                                         }
 388                                         $rid = $rt->getArticleID();
 389                                         if ( 0 != $rid ) {
 390                                                 $redirRow = $dbr->selectRow( 'cur', $this->getCurContentFields(),
 391                                                         array( 'cur_id' => $rid ), $fname, $this->getSelectOptions() );
 392
 393                                                 if ( $redirRow !== false ) {
 394                                                         $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 395                                                         $this->mTitle = $rt;
 396                                                         $s = $redirRow;
 397                                                 }
 398                                         }
 399                                 }
 400                         }
 401
 402                         $this->mContent = $s->cur_text;
 403                         $this->mUser = $s->cur_user;
 404                         $this->mUserText = $s->cur_user_text;
 405                         $this->mComment = $s->cur_comment;
 406                         $this->mCounter = $s->cur_counter;
 407                         $this->mTimestamp = wfTimestamp(TS_MW,$s->cur_timestamp);
 408                         $this->mTouched = wfTimestamp(TS_MW,$s->cur_touched);
 409                         $this->mTitle->mRestrictions = explode( ',', trim( $s->cur_restrictions ) );
 410                         $this->mTitle->mRestrictionsLoaded = true;
 411                 } else { # oldid set, retrieve historical version
 412                         $s = $dbr->getArray( 'old', $this->getOldContentFields(), array( 'old_id' => $oldid ),
 413                                 $fname, $this->getSelectOptions() );
 414                         if ( $s === false ) {
 415                                 return;
 416                         }
 417
 418                         if( $this->mTitle->getNamespace() != $s->old_namespace ||
 419                                 $this->mTitle->getDBkey() != $s->old_title ) {
 420                                 $oldTitle = Title::makeTitle( $s->old_namesapce, $s->old_title );
 421                                 $this->mTitle = $oldTitle;
 422                                 $wgTitle = $oldTitle;
 423                         }
 424                         $this->mContent = Article::getRevisionText( $s );
 425                         $this->mUser = $s->old_user;
 426                         $this->mUserText = $s->old_user_text;
 427                         $this->mComment = $s->old_comment;
 428                         $this->mCounter = 0;
 429                         $this->mTimestamp = wfTimestamp(TS_MW,$s->old_timestamp);
 430                 }
 431                 $this->mContentLoaded = true;
 432                 return $this->mContent;
 433         }
 434
 435         # Gets the article text without using so many damn globals
 436         # Returns false on error
 437         function getContentWithoutUsingSoManyDamnGlobals( $oldid = 0, $noredir = false ) {
 438                 global $wgMwRedir;
 439
 440                 if ( $this->mContentLoaded ) {
 441                         return $this->mContent;
 442                 }
 443                 $this->mContent = false;
 444
 445                 $fname = 'Article::getContentWithout';
 446                 $dbr =& $this->getDB();
 447
 448                 if ( ! $oldid ) {       # Retrieve current version
 449                         $id = $this->getID();
 450                         if ( 0 == $id ) {
 451                                 return false;
 452                         }
 453
 454                         $s = $dbr->selectRow( 'cur', $this->getCurContentFields(), array( 'cur_id' => $id ),
 455                                 $fname, $this->getSelectOptions() );
 456                         if ( $s === false ) {
 457                                 return false;
 458                         }
 459
 460                         # If we got a redirect, follow it (unless we've been told
 461                         # not to by either the function parameter or the query
 462                         if ( !$noredir ) {
 463                                 $rt = Title::newFromRedirect( $s->cur_text );
 464                                 if( $rt &&  $rt->getInterwiki() == '' && $rt->getNamespace() != NS_SPECIAL ) {
 465                                         $rid = $rt->getArticleID();
 466                                         if ( 0 != $rid ) {
 467                                                 $redirRow = $dbr->selectRow( 'cur', $this->getCurContentFields(),
 468                                                         array( 'cur_id' => $rid ), $fname, $this->getSelectOptions() );
 469
 470                                                 if ( $redirRow !== false ) {
 471                                                         $this->mRedirectedFrom = $this->mTitle->getPrefixedText();
 472                                                         $this->mTitle = $rt;
 473                                                         $s = $redirRow;
 474                                                 }
 475                                         }
 476                                 }
 477                         }
 478
 479                         $this->mContent = $s->cur_text;
 480                         $this->mUser = $s->cur_user;
 481                         $this->mUserText = $s->cur_user_text;
 482                         $this->mComment = $s->cur_comment;
 483                         $this->mCounter = $s->cur_counter;
 484                         $this->mTimestamp = wfTimestamp(TS_MW,$s->cur_timestamp);
 485                         $this->mTouched = wfTimestamp(TS_MW,$s->cur_touched);
 486                         $this->mTitle->mRestrictions = explode( ',', trim( $s->cur_restrictions ) );
 487                         $this->mTitle->mRestrictionsLoaded = true;
 488                 } else { # oldid set, retrieve historical version
 489                         $s = $dbr->selectRow( 'old', $this->getOldContentFields(), array( 'old_id' => $oldid ),
 490                                 $fname, $this->getSelectOptions() );
 491                         if ( $s === false ) {
 492                                 return false;
 493                         }
 494                         $this->mContent = Article::getRevisionText( $s );
 495                         $this->mUser = $s->old_user;
 496                         $this->mUserText = $s->old_user_text;
 497                         $this->mComment = $s->old_comment;
 498                         $this->mCounter = 0;
 499                         $this->mTimestamp = wfTimestamp(TS_MW,$s->old_timestamp);
 500                 }
 501                 $this->mContentLoaded = true;
 502                 return $this->mContent;
 503         }
 504
 505         # Read/write accessor to select FOR UPDATE
 506         function forUpdate( $x = NULL ) {
 507                 return wfSetVar( $this->mForUpdate, $x );
 508         }
 509
 510         # Get the database which should be used for reads
 511         function &getDB() {
 512                 if ( $this->mForUpdate ) {
 513                         return wfGetDB( DB_MASTER );
 514                 } else {
 515                         return wfGetDB( DB_SLAVE );
 516                 }
 517         }
 518
 519         # Get options for all SELECT statements
 520         # Can pass an option array, to which the class-wide options will be appended
 521         function getSelectOptions( $options = '' ) {
 522                 if ( $this->mForUpdate ) {
 523                         if ( $options ) {
 524                                 $options[] = 'FOR UPDATE';
 525                         } else {
 526                                 $options = 'FOR UPDATE';
 527                         }
 528                 }
 529                 return $options;
 530         }
 531
 532         function getID() {
 533                 if( $this->mTitle ) {
 534                         return $this->mTitle->getArticleID();
 535                 } else {
 536                         return 0;
 537                 }
 538         }
 539
 540         function getCount() {
 541                 if ( -1 == $this->mCounter ) {
 542                         $id = $this->getID();
 543                         $dbr =& $this->getDB();
 544                         $this->mCounter = $dbr->selectField( 'cur', 'cur_counter', 'cur_id='.$id,
 545                                 'Article::getCount', $this->getSelectOptions() );
 546                 }
 547                 return $this->mCounter;
 548         }
 549
 550         # Would the given text make this article a "good" article (i.e.,
 551         # suitable for including in the article count)?
 552         function isCountable( $text ) {
 553                 global $wgUseCommaCount, $wgMwRedir;
 554
 555                 if ( 0 != $this->mTitle->getNamespace() ) { return 0; }
 556                 if ( $wgMwRedir->matchStart( $text ) ) { return 0; }
 557                 $token = ($wgUseCommaCount ? ',' : '[[' );
 558                 if ( false === strstr( $text, $token ) ) { return 0; }
 559                 return 1;
 560         }
 561
 562         # Loads everything from cur except cur_text
 563         # This isn't necessary for all uses, so it's only done if needed.
 564         /* private */ function loadLastEdit() {
 565                 global $wgOut;
 566                 if ( -1 != $this->mUser ) return;
 567
 568                 $fname = 'Article::loadLastEdit';
 569
 570                 $dbr =& $this->getDB();
 571                 $s = $dbr->getArray( 'cur',
 572                   array( 'cur_user','cur_user_text','cur_timestamp', 'cur_comment','cur_minor_edit' ),
 573                   array( 'cur_id' => $this->getID() ), $fname, $this->getSelectOptions() );
 574
 575                 if ( $s !== false ) {
 576                         $this->mUser = $s->cur_user;
 577                         $this->mUserText = $s->cur_user_text;
 578                         $this->mTimestamp = wfTimestamp(TS_MW,$s->cur_timestamp);
 579                         $this->mComment = $s->cur_comment;
 580                         $this->mMinorEdit = $s->cur_minor_edit;
 581                 }
 582         }
 583
 584         function getTimestamp() {
 585                 $this->loadLastEdit();
 586                 return $this->mTimestamp;
 587         }
 588
 589         function getUser() {
 590                 $this->loadLastEdit();
 591                 return $this->mUser;
 592         }
 593
 594         function getUserText() {
 595                 $this->loadLastEdit();
 596                 return $this->mUserText;
 597         }
 598
 599         function getComment() {
 600                 $this->loadLastEdit();
 601                 return $this->mComment;
 602         }
 603
 604         function getMinorEdit() {
 605                 $this->loadLastEdit();
 606                 return $this->mMinorEdit;
 607         }
 608
 609         function getContributors($limit = 0, $offset = 0) {
 610                 $fname = 'Article::getContributors';
 611
 612                 # XXX: this is expensive; cache this info somewhere.
 613
 614                 $title = $this->mTitle;
 615                 $contribs = array();
 616                 $dbr =& $this->getDB();
 617                 $oldTable = $dbr->tableName( 'old' );
 618                 $userTable = $dbr->tableName( 'user' );
 619                 $encDBkey = $dbr->strencode( $title->getDBkey() );
 620                 $ns = $title->getNamespace();
 621                 $user = $this->getUser();
 622
 623                 $sql = "SELECT old_user, old_user_text, user_real_name, MAX(old_timestamp) as timestamp
 624                         FROM $oldTable LEFT JOIN $userTable ON old_user = user_id
 625                         WHERE old_namespace = $user
 626                         AND old_title = $encDBkey
 627                         AND old_user != $user
 628                         GROUP BY old_user
 629                         ORDER BY timestamp DESC";
 630
 631                 if ($limit > 0) { $sql .= ' LIMIT '.$limit; }
 632                 $sql .= ' '. $this->getSelectOptions();
 633
 634                 $res = $dbr->query($sql, $fname);
 635
 636                 while ( $line = $dbr->fetchObject( $res ) ) {
 637                         $contribs[] = array($line->old_user, $line->old_user_text, $line->user_real_name);
 638                 }
 639
 640                 $dbr->freeResult($res);
 641                 return $contribs;
 642         }
 643
 644         # This is the default action of the script: just view the page of
 645         # the given title.
 646
 647         function view() {
 648                 global $wgUser, $wgOut, $wgLang, $wgRequest, $wgMwRedir, $wgOnlySysopsCanPatrol;
 649                 global $wgLinkCache, $IP, $wgEnableParserCache, $wgStylePath, $wgUseRCPatrol;
 650                 $sk = $wgUser->getSkin();
 651
 652                 $fname = 'Article::view';
 653                 wfProfileIn( $fname );
 654                 # Get variables from query string
 655                 $oldid = $wgRequest->getVal( 'oldid' );
 656                 $diff = $wgRequest->getVal( 'diff' );
 657                 $rcid = $wgRequest->getVal( 'rcid' );
 658
 659                 $wgOut->setArticleFlag( true );
 660                 $wgOut->setRobotpolicy( 'index,follow' );
 661                 # If we got diff and oldid in the query, we want to see a
 662                 # diff page instead of the article.
 663
 664                 if ( !is_null( $diff ) ) {
 665                         require_once( 'DifferenceEngine.php' );
 666                         $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 667                         $de = new DifferenceEngine( intval($oldid), intval($diff), intval($rcid) );
 668                         $de->showDiffPage();
 669                         wfProfileOut( $fname );
 670                         if( $diff == 0 ) {
 671                                 # Run view updates for current revision only
 672                                 $this->viewUpdates();
 673                         }
 674                         return;
 675                 }
 676                 if ( empty( $oldid ) && $this->checkTouched() ) {
 677                         if( $wgOut->checkLastModified( $this->mTouched ) ){
 678                                 return;
 679                         } else if ( $this->tryFileCache() ) {
 680                                 # tell wgOut that output is taken care of
 681                                 $wgOut->disable();
 682                                 $this->viewUpdates();
 683                                 return;
 684                         }
 685                 }
 686                 # Should the parser cache be used?
 687                 if ( $wgEnableParserCache && intval($wgUser->getOption( 'stubthreshold' )) == 0 && empty( $oldid ) ) {
 688                         $pcache = true;
 689                 } else {
 690                         $pcache = false;
 691                 }
 692
 693                 $outputDone = false;
 694                 if ( $pcache ) {
 695                         if ( $wgOut->tryParserCache( $this, $wgUser ) ) {
 696                                 $outputDone = true;
 697                         }
 698                 }
 699                 if ( !$outputDone ) {
 700                         $text = $this->getContent( false ); # May change mTitle by following a redirect
 701
 702                         # Another whitelist check in case oldid or redirects are altering the title
 703                         if ( !$this->mTitle->userCanRead() ) {
 704                                 $wgOut->loginToUse();
 705                                 $wgOut->output();
 706                                 exit;
 707                         }
 708
 709
 710                         # We're looking at an old revision
 711
 712                         if ( !empty( $oldid ) ) {
 713                                 $this->setOldSubtitle();
 714                                 $wgOut->setRobotpolicy( 'noindex,follow' );
 715                         }
 716                         if ( '' != $this->mRedirectedFrom ) {
 717                                 $sk = $wgUser->getSkin();
 718                                 $redir = $sk->makeKnownLink( $this->mRedirectedFrom, '',
 719                                   'redirect=no' );
 720                                 $s = wfMsg( 'redirectedfrom', $redir );
 721                                 $wgOut->setSubtitle( $s );
 722
 723                                 # Can't cache redirects
 724                                 $pcache = false;
 725                         }
 726
 727                         # wrap user css and user js in pre and don't parse
 728                         # XXX: use $this->mTitle->usCssJsSubpage() when php is fixed/ a workaround is found
 729                         if (
 730                                 $this->mTitle->getNamespace() == NS_USER &&
 731                                 preg_match('/\\/[\\w]+\\.(css|js)$/', $this->mTitle->getDBkey())
 732                         ) {
 733                                 $wgOut->addWikiText( wfMsg('clearyourcache'));
 734                                 $wgOut->addHTML( '<pre>'.htmlspecialchars($this->mContent)."\n</pre>" );
 735                         } else if ( $rt = Title::newFromRedirect( $text ) ) {
 736                                 # Display redirect
 737                                 $imageUrl = $wgStylePath.'/images/redirect.png';
 738                                 $targetUrl = $rt->escapeLocalURL();
 739                                 $titleText = htmlspecialchars( $rt->getPrefixedText() );
 740                                 $link = $sk->makeLinkObj( $rt );
 741                                 $wgOut->addHTML( '<img valign="center" src="'.$imageUrl.'">' .
 742                                   '<span class="redirectText">'.$link.'</span>' );
 743                         } else if ( $pcache ) {
 744                                 # Display content and save to parser cache
 745                                 $wgOut->addPrimaryWikiText( $text, $this );
 746                         } else {
 747                                 # Display content, don't attempt to save to parser cache
 748                                 $wgOut->addWikiText( $text );
 749                         }
 750                 }
 751                 $wgOut->setPageTitle( $this->mTitle->getPrefixedText() );
 752                 # If we have been passed an &rcid= parameter, we want to give the user a
 753                 # chance to mark this new article as patrolled.
 754                 if ( $wgUseRCPatrol && !is_null ( $rcid ) && $rcid != 0 && $wgUser->getID() != 0 &&
 755                      ( $wgUser->isSysop() || !$wgOnlySysopsCanPatrol ) )
 756                 {
 757                         $wgOut->addHTML( wfMsg ( 'markaspatrolledlink',
 758                                 $sk->makeKnownLinkObj ( $this->mTitle, wfMsg ( 'markaspatrolledtext' ),
 759                                         'action=markpatrolled&rcid='.$rcid )
 760                          ) );
 761                 }
 762
 763                 # Put link titles into the link cache
 764                 $wgOut->transformBuffer();
 765
 766                 # Add link titles as META keywords
 767                 $wgOut->addMetaTags() ;
 768
 769                 $this->viewUpdates();
 770                 wfProfileOut( $fname );
 771         }
 772
 773         # Theoretically we could defer these whole insert and update
 774         # functions for after display, but that's taking a big leap
 775         # of faith, and we want to be able to report database
 776         # errors at some point.
 777
 778         /* private */ function insertNewArticle( $text, $summary, $isminor, $watchthis ) {
 779                 global $wgOut, $wgUser, $wgMwRedir;
 780                 global $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
 781
 782                 $fname = 'Article::insertNewArticle';
 783
 784                 $this->mCountAdjustment = $this->isCountable( $text );
 785
 786                 $ns = $this->mTitle->getNamespace();
 787                 $ttl = $this->mTitle->getDBkey();
 788                 $text = $this->preSaveTransform( $text );
 789                 if ( $wgMwRedir->matchStart( $text ) ) { $redir = 1; }
 790                 else { $redir = 0; }
 791
 792                 $now = wfTimestampNow();
 793                 $won = wfInvertTimestamp( $now );
 794                 wfSeedRandom();
 795                 $rand = number_format( mt_rand() / mt_getrandmax(), 12, '.', '' );
 796                 $dbw =& wfGetDB( DB_MASTER );
 797
 798                 $cur_id = $dbw->nextSequenceValue( 'cur_cur_id_seq' );
 799
 800                 $isminor = ( $isminor && $wgUser->getID() ) ? 1 : 0;
 801
 802                 $dbw->insertArray( 'cur', array(
 803                         'cur_id' => $cur_id,
 804                         'cur_namespace' => $ns,
 805                         'cur_title' => $ttl,
 806                         'cur_text' => $text,
 807                         'cur_comment' => $summary,
 808                         'cur_user' => $wgUser->getID(),
 809                         'cur_timestamp' => $dbw->timestamp($now),
 810                         'cur_minor_edit' => $isminor,
 811                         'cur_counter' => 0,
 812                         'cur_restrictions' => '',
 813                         'cur_user_text' => $wgUser->getName(),
 814                         'cur_is_redirect' => $redir,
 815                         'cur_is_new' => 1,
 816                         'cur_random' => $rand,
 817                         'cur_touched' => $dbw->timestamp($now),
 818                         'inverse_timestamp' => $won,
 819                 ), $fname );
 820
 821                 $newid = $dbw->insertId();
 822                 $this->mTitle->resetArticleID( $newid );
 823
 824                 Article::onArticleCreate( $this->mTitle );
 825                 RecentChange::notifyNew( $now, $this->mTitle, $isminor, $wgUser, $summary );
 826
 827                 if ($watchthis) {
 828                         if(!$this->mTitle->userIsWatching()) $this->watch();
 829                 } else {
 830                         if ( $this->mTitle->userIsWatching() ) {
 831                                 $this->unwatch();
 832                         }
 833                 }
 834
 835                 # The talk page isn't in the regular link tables, so we need to update manually:
 836                 $talkns = $ns ^ 1; # talk -> normal; normal -> talk
 837                 $dbw->updateArray( 'cur', array('cur_touched' => $dbw->timestamp($now) ),
 838                         array(  'cur_namespace' => $talkns, 'cur_title' => $ttl ), $fname );
 839
 840                 # standard deferred updates
 841                 $this->editUpdates( $text );
 842
 843                 $this->showArticle( $text, wfMsg( 'newarticle' ) );
 844         }
 845
 846
 847         /* Side effects: loads last edit */
 848         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = '') {
 849                 $this->loadLastEdit();
 850                 $oldtext = $this->getContent( true );
 851                 if ($section != '') {
 852                         if($section=='new') {
 853                                 if($summary) $subject="== {$summary} ==\n\n";
 854                                 $text=$oldtext."\n\n".$subject.$text;
 855                         } else {
 856
 857                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 858                                 # comments to be stripped as well)
 859                                 $striparray=array();
 860                                 $parser=new Parser();
 861                                 $parser->mOutputType=OT_WIKI;
 862                                 $oldtext=$parser->strip($oldtext, $striparray, true);
 863
 864                                 # now that we can be sure that no pseudo-sections are in the source,
 865                                 # split it up
 866                                 # Unfortunately we can't simply do a preg_replace because that might
 867                                 # replace the wrong section, so we have to use the section counter instead
 868                                 $secs=preg_split('/(^=+.*?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)/mi',
 869                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 870                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 871
 872                                 # section 0 is top (intro) section
 873                                 if($section!=0) {
 874
 875                                         # headline of old section - we need to go through this section
 876                                         # to determine if there are any subsections that now need to
 877                                         # be erased, as the mother section has been replaced with
 878                                         # the text of all subsections.
 879                                         $headline=$secs[$section*2-1];
 880                                         preg_match( '/^(=+).*?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>/mi',$headline,$matches);
 881                                         $hlevel=$matches[1];
 882
 883                                         # determine headline level for wikimarkup headings
 884                                         if(strpos($hlevel,'=')!==false) {
 885                                                 $hlevel=strlen($hlevel);
 886                                         }
 887
 888                                         $secs[$section*2-1]=''; // erase old headline
 889                                         $count=$section+1;
 890                                         $break=false;
 891                                         while(!empty($secs[$count*2-1]) && !$break) {
 892
 893                                                 $subheadline=$secs[$count*2-1];
 894                                                 preg_match(
 895                                                  '/^(=+).*?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>/mi',$subheadline,$matches);
 896                                                 $subhlevel=$matches[1];
 897                                                 if(strpos($subhlevel,'=')!==false) {
 898                                                         $subhlevel=strlen($subhlevel);
 899                                                 }
 900                                                 if($subhlevel > $hlevel) {
 901                                                         // erase old subsections
 902                                                         $secs[$count*2-1]='';
 903                                                         $secs[$count*2]='';
 904                                                 }
 905                                                 if($subhlevel <= $hlevel) {
 906                                                         $break=true;
 907                                                 }
 908                                                 $count++;
 909
 910                                         }
 911
 912                                 }
 913                                 $text=join('',$secs);
 914                                 # reinsert the stuff that we stripped out earlier
 915                                 $text=$parser->unstrip($text,$striparray);
 916                                 $text=$parser->unstripNoWiki($text,$striparray);
 917                         }
 918
 919                 }
 920                 return $text;
 921         }
 922
 923         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
 924                 global $wgOut, $wgUser;
 925                 global $wgDBtransactions, $wgMwRedir;
 926                 global $wgUseSquid, $wgInternalServer;
 927
 928                 $fname = 'Article::updateArticle';
 929                 $good = true;
 930
 931                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
 932                 if ( $minor && $wgUser->getID() ) { $me2 = 1; } else { $me2 = 0; }
 933                 if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ')[^\\n]+)/i', $text, $m ) ) {
 934                         $redir = 1;
 935                         $text = $m[1] . "\n"; # Remove all content but redirect
 936                 }
 937                 else { $redir = 0; }
 938
 939                 $text = $this->preSaveTransform( $text );
 940                 $dbw =& wfGetDB( DB_MASTER );
 941
 942                 # Update article, but only if changed.
 943
 944                 # It's important that we either rollback or complete, otherwise an attacker could
 945                 # overwrite cur entries by sending precisely timed user aborts. Random bored users
 946                 # could conceivably have the same effect, especially if cur is locked for long periods.
 947                 if( $wgDBtransactions ) {
 948                         $dbw->query( 'BEGIN', $fname );
 949                 } else {
 950                         $userAbort = ignore_user_abort( true );
 951                 }
 952
 953                 $oldtext = $this->getContent( true );
 954
 955                 if ( 0 != strcmp( $text, $oldtext ) ) {
 956                         $this->mCountAdjustment = $this->isCountable( $text )
 957                           - $this->isCountable( $oldtext );
 958                         $now = wfTimestampNow();
 959                         $won = wfInvertTimestamp( $now );
 960
 961                         # First update the cur row
 962                         $dbw->updateArray( 'cur',
 963                                 array( /* SET */
 964                                         'cur_text' => $text,
 965                                         'cur_comment' => $summary,
 966                                         'cur_minor_edit' => $me2,
 967                                         'cur_user' => $wgUser->getID(),
 968                                         'cur_timestamp' => $dbw->timestamp($now),
 969                                         'cur_user_text' => $wgUser->getName(),
 970                                         'cur_is_redirect' => $redir,
 971                                         'cur_is_new' => 0,
 972                                         'cur_touched' => $dbw->timestamp($now),
 973                                         'inverse_timestamp' => $won
 974                                 ), array( /* WHERE */
 975                                         'cur_id' => $this->getID(),
 976                                         'cur_timestamp' => $dbw->timestamp($this->getTimestamp())
 977                                 ), $fname
 978                         );
 979
 980                         if( $dbw->affectedRows() == 0 ) {
 981                                 /* Belated edit conflict! Run away!! */
 982                                 $good = false;
 983                         } else {
 984                                 # Now insert the previous revision into old
 985
 986                                 # This overwrites $oldtext if revision compression is on
 987                                 $flags = Article::compressRevisionText( $oldtext );
 988
 989                                 $dbw->insertArray( 'old',
 990                                         array(
 991                                                 'old_id' => $dbw->nextSequenceValue( 'old_old_id_seq' ),
 992                                                 'old_namespace' => $this->mTitle->getNamespace(),
 993                                                 'old_title' => $this->mTitle->getDBkey(),
 994                                                 'old_text' => $oldtext,
 995                                                 'old_comment' => $this->getComment(),
 996                                                 'old_user' => $this->getUser(),
 997                                                 'old_user_text' => $this->getUserText(),
 998                                                 'old_timestamp' => $dbw->timestamp($this->getTimestamp()),
 999                                                 'old_minor_edit' => $me1,
1000                                                 'inverse_timestamp' => wfInvertTimestamp( $this->getTimestamp() ),
1001                                                 'old_flags' => $flags,
1002                                         ), $fname
1003                                 );
1004
1005                                 $oldid = $dbw->insertId();
1006
1007                                 $bot = (int)($wgUser->isBot() || $forceBot);
1008                                 RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
1009                                         $oldid, $this->getTimestamp(), $bot );
1010                                 Article::onArticleEdit( $this->mTitle );
1011                         }
1012                 }
1013
1014                 if( $wgDBtransactions ) {
1015                         $dbw->query( 'COMMIT', $fname );
1016                 } else {
1017                         ignore_user_abort( $userAbort );
1018                 }
1019
1020                 if ( $good ) {
1021                 if ($watchthis) {
1022                         if (!$this->mTitle->userIsWatching()) $this->watch();
1023                 } else {
1024                         if ( $this->mTitle->userIsWatching() ) {
1025                                 $this->unwatch();
1026                         }
1027                 }
1028                 # standard deferred updates
1029                 $this->editUpdates( $text );
1030
1031
1032                 $urls = array();
1033                 # Template namespace
1034                 # Purge all articles linking here
1035                 if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
1036                         $titles = $this->mTitle->getLinksTo();
1037                         Title::touchArray( $titles );
1038                         if ( $wgUseSquid ) {
1039                                         foreach ( $titles as $title ) {
1040                                                 $urls[] = $title->getInternalURL();
1041                                         }
1042                         }
1043                 }
1044
1045                 # Squid updates
1046                 if ( $wgUseSquid ) {
1047                         $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
1048                         $u = new SquidUpdate( $urls );
1049                         $u->doUpdate();
1050                 }
1051
1052                 $this->showArticle( $text, wfMsg( 'updated' ), $sectionanchor );
1053                 }
1054                 return $good;
1055         }
1056
1057         # After we've either updated or inserted the article, update
1058         # the link tables and redirect to the new page.
1059
1060         function showArticle( $text, $subtitle , $sectionanchor = '' ) {
1061                 global $wgOut, $wgUser, $wgLinkCache;
1062                 global $wgMwRedir;
1063
1064                 $wgLinkCache = new LinkCache();
1065                 # Select for update
1066                 $wgLinkCache->forUpdate( true );
1067
1068                 # Get old version of link table to allow incremental link updates
1069                 $wgLinkCache->preFill( $this->mTitle );
1070                 $wgLinkCache->clear();
1071
1072                 # Parse the text and replace links with placeholders
1073                 $wgOut = new OutputPage();
1074                 $wgOut->addWikiText( $text );
1075
1076                 # Look up the links in the DB and add them to the link cache
1077                 $wgOut->transformBuffer( RLH_FOR_UPDATE );
1078
1079                 if( $wgMwRedir->matchStart( $text ) )
1080                         $r = 'redirect=no';
1081                 else
1082                         $r = '';
1083                 $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
1084         }
1085
1086         # Validate article
1087
1088         function validate () {
1089                 global $wgOut, $wgUseValidation;
1090                 if( $wgUseValidation ) {
1091                         $wgOut->setPagetitle( wfMsg( 'validate' ) . ': ' . $this->mTitle->getPrefixedText() );
1092                         $wgOut->setRobotpolicy( 'noindex,follow' );
1093                         if( $this->mTitle->getNamespace() != 0 ) {
1094                                 $wgOut->addHTML( wfMsg( 'val_validate_article_namespace_only' ) );
1095                                 return;
1096                         }
1097                         $v = new Validation;
1098                         $v->validate_form( $this->mTitle->getDBkey() );
1099                 } else {
1100                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
1101                 }
1102         }
1103
1104         # Mark this particular edit as patrolled
1105         function markpatrolled() {
1106                 global $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgUseRCPatrol, $wgUser;
1107                 $wgOut->setRobotpolicy( 'noindex,follow' );
1108
1109                 if ( !$wgUseRCPatrol )
1110                 {
1111                         $wgOut->errorpage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1112                         return;
1113                 }
1114                 if ( $wgUser->getID() == 0 )
1115                 {
1116                         $wgOut->loginToUse();
1117                         return;
1118                 }
1119                 if ( $wgOnlySysopsCanPatrol && !$wgUser->isSysop() )
1120                 {
1121                         $wgOut->sysopRequired();
1122                         return;
1123                 }
1124                 $rcid = $wgRequest->getVal( 'rcid' );
1125                 if ( !is_null ( $rcid ) )
1126                 {
1127                         RecentChange::markPatrolled( $rcid );
1128                         $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
1129                         $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
1130                         $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1131                 }
1132                 else
1133                 {
1134                         $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1135                 }
1136         }
1137
1138
1139         # Add this page to my watchlist
1140
1141         function watch( $add = true ) {
1142                 global $wgUser, $wgOut, $wgLang;
1143                 global $wgDeferredUpdateList;
1144
1145                 if ( 0 == $wgUser->getID() ) {
1146                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1147                         return;
1148                 }
1149                 if ( wfReadOnly() ) {
1150                         $wgOut->readOnlyPage();
1151                         return;
1152                 }
1153                 if( $add )
1154                         $wgUser->addWatch( $this->mTitle );
1155                 else
1156                         $wgUser->removeWatch( $this->mTitle );
1157
1158                 $wgOut->setPagetitle( wfMsg( $add ? 'addedwatch' : 'removedwatch' ) );
1159                 $wgOut->setRobotpolicy( 'noindex,follow' );
1160
1161                 $sk = $wgUser->getSkin() ;
1162                 $link = $this->mTitle->getPrefixedText();
1163
1164                 if($add)
1165                         $text = wfMsg( 'addedwatchtext', $link );
1166                 else
1167                         $text = wfMsg( 'removedwatchtext', $link );
1168                 $wgOut->addWikiText( $text );
1169
1170                 $up = new UserUpdate();
1171                 array_push( $wgDeferredUpdateList, $up );
1172
1173                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1174         }
1175
1176         function unwatch() {
1177                 $this->watch( false );
1178         }
1179
1180         # protect a page
1181
1182         function protect( $limit = 'sysop' ) {
1183                 global $wgUser, $wgOut, $wgRequest;
1184
1185                 if ( ! $wgUser->isSysop() ) {
1186                         $wgOut->sysopRequired();
1187                         return;
1188                 }
1189                 if ( wfReadOnly() ) {
1190                         $wgOut->readOnlyPage();
1191                         return;
1192                 }
1193                 $id = $this->mTitle->getArticleID();
1194                 if ( 0 == $id ) {
1195                         $wgOut->fatalError( wfMsg( 'badarticleerror' ) );
1196                         return;
1197                 }
1198
1199                 $confirm = $wgRequest->getBool( 'wpConfirmProtect' ) && $wgRequest->wasPosted();
1200                 $reason = $wgRequest->getText( 'wpReasonProtect' );
1201
1202                 if ( $confirm ) {
1203                         $dbw =& wfGetDB( DB_MASTER );
1204                         $dbw->updateArray( 'cur',
1205                                 array( /* SET */
1206                                         'cur_touched' => $dbw->timestamp(),
1207                                         'cur_restrictions' => (string)$limit
1208                                 ), array( /* WHERE */
1209                                         'cur_id' => $id
1210                                 ), 'Article::protect'
1211                         );
1212
1213                         $log = new LogPage( wfMsg( 'protectlogpage' ), wfMsg( 'protectlogtext' ) );
1214                         if ( $limit === '' ) {
1215                                         $log->addEntry( wfMsg( 'unprotectedarticle', $this->mTitle->getPrefixedText() ), $reason );
1216                         } else {
1217                                         $log->addEntry( wfMsg( 'protectedarticle', $this->mTitle->getPrefixedText() ), $reason );
1218                         }
1219                         $wgOut->redirect( $this->mTitle->getFullURL() );
1220                         return;
1221                 } else {
1222                         $reason = htmlspecialchars( wfMsg( 'protectreason' ) );
1223                         return $this->confirmProtect( '', $reason, $limit );
1224                 }
1225         }
1226
1227         # Output protection confirmation dialog
1228
1229         function confirmProtect( $par, $reason, $limit = 'sysop'  ) {
1230                 global $wgOut;
1231
1232                 wfDebug( "Article::confirmProtect\n" );
1233
1234                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1235                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1236
1237                 $check = '';
1238                 $protcom = '';
1239
1240                 if ( $limit === '' ) {
1241                         $wgOut->setPageTitle( wfMsg( 'confirmunprotect' ) );
1242                         $wgOut->setSubtitle( wfMsg( 'unprotectsub', $sub ) );
1243                         $wgOut->addWikiText( wfMsg( 'confirmunprotecttext' ) );
1244                         $check = htmlspecialchars( wfMsg( 'confirmunprotect' ) );
1245                         $protcom = htmlspecialchars( wfMsg( 'unprotectcomment' ) );
1246                         $formaction = $this->mTitle->escapeLocalURL( 'action=unprotect' . $par );
1247                 } else {
1248                         $wgOut->setPageTitle( wfMsg( 'confirmprotect' ) );
1249                         $wgOut->setSubtitle( wfMsg( 'protectsub', $sub ) );
1250                         $wgOut->addWikiText( wfMsg( 'confirmprotecttext' ) );
1251                         $check = htmlspecialchars( wfMsg( 'confirmprotect' ) );
1252                         $protcom = htmlspecialchars( wfMsg( 'protectcomment' ) );
1253                         $formaction = $this->mTitle->escapeLocalURL( 'action=protect' . $par );
1254                 }
1255
1256                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1257
1258                 $wgOut->addHTML( "
1259 <form id='protectconfirm' method='post' action=\"{$formaction}\">
1260         <table border='0'>
1261                 <tr>
1262                         <td align='right'>
1263                                 <label for='wpReasonProtect'>{$protcom}:</label>
1264                         </td>
1265                         <td align='left'>
1266                                 <input type='text' size='60' name='wpReasonProtect' id='wpReasonProtect' value=\"" . htmlspecialchars( $reason ) . "\" />
1267                         </td>
1268                 </tr>
1269                 <tr>
1270                         <td>&nbsp;</td>
1271                 </tr>
1272                 <tr>
1273                         <td align='right'>
1274                                 <input type='checkbox' name='wpConfirmProtect' value='1' id='wpConfirmProtect' />
1275                         </td>
1276                         <td>
1277                                 <label for='wpConfirmProtect'>{$check}</label>
1278                         </td>
1279                 </tr>
1280                 <tr>
1281                         <td>&nbsp;</td>
1282                         <td>
1283                                 <input type='submit' name='wpConfirmProtectB' value=\"{$confirm}\" />
1284                         </td>
1285                 </tr>
1286         </table>
1287 </form>\n" );
1288
1289                 $wgOut->returnToMain( false );
1290         }
1291
1292         function unprotect() {
1293                 return $this->protect( '' );
1294         }
1295
1296         # UI entry point for page deletion
1297
1298         function delete() {
1299                 global $wgUser, $wgOut, $wgMessageCache, $wgRequest;
1300                 $fname = 'Article::delete';
1301                 $confirm = $wgRequest->getBool( 'wpConfirm' ) && $wgRequest->wasPosted();
1302                 $reason = $wgRequest->getText( 'wpReason' );
1303
1304                 # This code desperately needs to be totally rewritten
1305
1306                 # Check permissions
1307                 if ( ( ! $wgUser->isSysop() ) ) {
1308                         $wgOut->sysopRequired();
1309                         return;
1310                 }
1311                 if ( wfReadOnly() ) {
1312                         $wgOut->readOnlyPage();
1313                         return;
1314                 }
1315
1316                 # Better double-check that it hasn't been deleted yet!
1317                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1318                 if ( ( '' == trim( $this->mTitle->getText() ) )
1319                   or ( $this->mTitle->getArticleId() == 0 ) ) {
1320                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1321                         return;
1322                 }
1323
1324                 if ( $confirm ) {
1325                         $this->doDelete( $reason );
1326                         return;
1327                 }
1328
1329                 # determine whether this page has earlier revisions
1330                 # and insert a warning if it does
1331                 # we select the text because it might be useful below
1332                 $dbr =& $this->getDB();
1333                 $ns = $this->mTitle->getNamespace();
1334                 $title = $this->mTitle->getDBkey();
1335                 $old = $dbr->getArray( 'old',
1336                         array( 'old_text', 'old_flags' ),
1337                         array(
1338                                 'old_namespace' => $ns,
1339                                 'old_title' => $title,
1340                         ), $fname, $this->getSelectOptions( array( 'ORDER BY' => 'inverse_timestamp' ) )
1341                 );
1342
1343                 if( $old !== false && !$confirm ) {
1344                         $skin=$wgUser->getSkin();
1345                         $wgOut->addHTML('<b>'.wfMsg('historywarning'));
1346                         $wgOut->addHTML( $skin->historyLink() .'</b>');
1347                 }
1348
1349                 # Fetch cur_text
1350                 $s = $dbr->getArray( 'cur',
1351                         array( 'cur_text' ),
1352                         array(
1353                                 'cur_namespace' => $ns,
1354                                 'cur_title' => $title,
1355                         ), $fname, $this->getSelectOptions()
1356                 );
1357
1358                 if( $s !== false ) {
1359                         # if this is a mini-text, we can paste part of it into the deletion reason
1360
1361                         #if this is empty, an earlier revision may contain "useful" text
1362                         $blanked = false;
1363                         if($s->cur_text != '') {
1364                                 $text=$s->cur_text;
1365                         } else {
1366                                 if($old) {
1367                                         $text = Article::getRevisionText( $old );
1368                                         $blanked = true;
1369                                 }
1370
1371                         }
1372
1373                         $length=strlen($text);
1374
1375                         # this should not happen, since it is not possible to store an empty, new
1376                         # page. Let's insert a standard text in case it does, though
1377                         if($length == 0 && $reason === '') {
1378                                 $reason = wfMsg('exblank');
1379                         }
1380
1381                         if($length < 500 && $reason === '') {
1382
1383                                 # comment field=255, let's grep the first 150 to have some user
1384                                 # space left
1385                                 $text=substr($text,0,150);
1386                                 # let's strip out newlines and HTML tags
1387                                 $text=preg_replace('/\"/',"'",$text);
1388                                 $text=preg_replace('/\</','&lt;',$text);
1389                                 $text=preg_replace('/\>/','&gt;',$text);
1390                                 $text=preg_replace("/[\n\r]/",'',$text);
1391                                 if(!$blanked) {
1392                                         $reason=wfMsg('excontent'). " '".$text;
1393                                 } else {
1394                                         $reason=wfMsg('exbeforeblank') . " '".$text;
1395                                 }
1396                                 if($length>150) { $reason .= '...'; } # we've only pasted part of the text
1397                                 $reason.="'";
1398                         }
1399                 }
1400
1401                 return $this->confirmDelete( '', $reason );
1402         }
1403
1404         # Output deletion confirmation dialog
1405
1406         function confirmDelete( $par, $reason ) {
1407                 global $wgOut;
1408
1409                 wfDebug( "Article::confirmDelete\n" );
1410
1411                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1412                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1413                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1414                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1415
1416                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1417
1418                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1419                 $check = htmlspecialchars( wfMsg( 'confirmcheck' ) );
1420                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1421
1422                 $wgOut->addHTML( "
1423 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1424         <table border='0'>
1425                 <tr>
1426                         <td align='right'>
1427                                 <label for='wpReason'>{$delcom}:</label>
1428                         </td>
1429                         <td align='left'>
1430                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1431                         </td>
1432                 </tr>
1433                 <tr>
1434                         <td>&nbsp;</td>
1435                 </tr>
1436                 <tr>
1437                         <td align='right'>
1438                                 <input type='checkbox' name='wpConfirm' value='1' id='wpConfirm' />
1439                         </td>
1440                         <td>
1441                                 <label for='wpConfirm'>{$check}</label>
1442                         </td>
1443                 </tr>
1444                 <tr>
1445                         <td>&nbsp;</td>
1446                         <td>
1447                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1448                         </td>
1449                 </tr>
1450         </table>
1451 </form>\n" );
1452
1453                 $wgOut->returnToMain( false );
1454         }
1455
1456
1457         # Perform a deletion and output success or failure messages
1458
1459         function doDelete( $reason ) {
1460                 global $wgOut, $wgUser, $wgLang;
1461                 $fname = 'Article::doDelete';
1462                 wfDebug( $fname."\n" );
1463
1464                 if ( $this->doDeleteArticle( $reason ) ) {
1465                         $deleted = $this->mTitle->getPrefixedText();
1466
1467                         $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1468                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
1469
1470                         $sk = $wgUser->getSkin();
1471                         $loglink = $sk->makeKnownLink( $wgLang->getNsText( NS_WIKIPEDIA ) .
1472                           ':' . wfMsg( 'dellogpage' ), wfMsg( 'deletionlog' ) );
1473
1474                         $text = wfMsg( 'deletedtext', $deleted, $loglink );
1475
1476                         $wgOut->addHTML( '<p>' . $text . "</p>\n" );
1477                         $wgOut->returnToMain( false );
1478                 } else {
1479                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1480                 }
1481         }
1482
1483         # Back-end article deletion
1484         # Deletes the article with database consistency, writes logs, purges caches
1485         # Returns success
1486         function doDeleteArticle( $reason ) {
1487                 global $wgUser, $wgLang;
1488                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
1489
1490                 $fname = 'Article::doDeleteArticle';
1491                 wfDebug( $fname."\n" );
1492
1493                 $dbw =& wfGetDB( DB_MASTER );
1494                 $ns = $this->mTitle->getNamespace();
1495                 $t = $this->mTitle->getDBkey();
1496                 $id = $this->mTitle->getArticleID();
1497
1498                 if ( $t == '' || $id == 0 ) {
1499                         return false;
1500                 }
1501
1502                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
1503                 array_push( $wgDeferredUpdateList, $u );
1504
1505                 $linksTo = $this->mTitle->getLinksTo();
1506
1507                 # Squid purging
1508                 if ( $wgUseSquid ) {
1509                         $urls = array(
1510                                 $this->mTitle->getInternalURL(),
1511                                 $this->mTitle->getInternalURL( 'history' )
1512                         );
1513                         foreach ( $linksTo as $linkTo ) {
1514                                 $urls[] = $linkTo->getInternalURL();
1515                         }
1516
1517                         $u = new SquidUpdate( $urls );
1518                         array_push( $wgDeferredUpdateList, $u );
1519
1520                 }
1521
1522                 # Client and file cache invalidation
1523                 Title::touchArray( $linksTo );
1524
1525                 # Move article and history to the "archive" table
1526                 $archiveTable = $dbw->tableName( 'archive' );
1527                 $oldTable = $dbw->tableName( 'old' );
1528                 $curTable = $dbw->tableName( 'cur' );
1529                 $recentchangesTable = $dbw->tableName( 'recentchanges' );
1530                 $linksTable = $dbw->tableName( 'links' );
1531                 $brokenlinksTable = $dbw->tableName( 'brokenlinks' );
1532
1533                 $dbw->insertSelect( 'archive', 'cur',
1534                         array(
1535                                 'ar_namespace' => 'cur_namespace',
1536                                 'ar_title' => 'cur_title',
1537                                 'ar_text' => 'cur_text',
1538                                 'ar_comment' => 'cur_comment',
1539                                 'ar_user' => 'cur_user',
1540                                 'ar_user_text' => 'cur_user_text',
1541                                 'ar_timestamp' => 'cur_timestamp',
1542                                 'ar_minor_edit' => 'cur_minor_edit',
1543                                 'ar_flags' => 0,
1544                         ), array(
1545                                 'cur_namespace' => $ns,
1546                                 'cur_title' => $t,
1547                         ), $fname
1548                 );
1549
1550                 $dbw->insertSelect( 'archive', 'old',
1551                         array(
1552                                 'ar_namespace' => 'old_namespace',
1553                                 'ar_title' => 'old_title',
1554                                 'ar_text' => 'old_text',
1555                                 'ar_comment' => 'old_comment',
1556                                 'ar_user' => 'old_user',
1557                                 'ar_user_text' => 'old_user_text',
1558                                 'ar_timestamp' => 'old_timestamp',
1559                                 'ar_minor_edit' => 'old_minor_edit',
1560                                 'ar_flags' => 'old_flags'
1561                         ), array(
1562                                 'old_namespace' => $ns,
1563                                 'old_title' => $t,
1564                         ), $fname
1565                 );
1566
1567                 # Now that it's safely backed up, delete it
1568
1569                 $dbw->delete( 'cur', array( 'cur_namespace' => $ns, 'cur_title' => $t ), $fname );
1570                 $dbw->delete( 'old', array( 'old_namespace' => $ns, 'old_title' => $t ), $fname );
1571                 $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), $fname );
1572
1573                 # Finally, clean up the link tables
1574                 $t = $this->mTitle->getPrefixedDBkey();
1575
1576                 Article::onArticleDelete( $this->mTitle );
1577
1578                 # Insert broken links
1579                 $brokenLinks = array();
1580                 foreach ( $linksTo as $titleObj ) {
1581                         # Get article ID. Efficient because it was loaded into the cache by getLinksTo().
1582                         $linkID = $titleObj->getArticleID();
1583                         $brokenLinks[] = array( 'bl_from' => $linkID, 'bl_to' => $t );
1584                 }
1585                 $dbw->insert( 'brokenlinks', $brokenLinks, $fname, 'IGNORE' );
1586
1587                 # Delete live links
1588                 $dbw->delete( 'links', array( 'l_to' => $id ) );
1589                 $dbw->delete( 'links', array( 'l_from' => $id ) );
1590                 $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
1591                 $dbw->delete( 'brokenlinks', array( 'bl_from' => $id ) );
1592                 $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
1593
1594                 # Log the deletion
1595                 $log = new LogPage( wfMsg( 'dellogpage' ), wfMsg( 'dellogpagetext' ) );
1596                 $art = $this->mTitle->getPrefixedText();
1597                 $log->addEntry( wfMsg( 'deletedarticle', $art ), $reason );
1598
1599                 # Clear the cached article id so the interface doesn't act like we exist
1600                 $this->mTitle->resetArticleID( 0 );
1601                 $this->mTitle->mArticleID = 0;
1602                 return true;
1603         }
1604
1605         function rollback() {
1606                 global $wgUser, $wgLang, $wgOut, $wgRequest;
1607                 $fname = 'Article::rollback';
1608
1609                 if ( ! $wgUser->isSysop() ) {
1610                         $wgOut->sysopRequired();
1611                         return;
1612                 }
1613                 if ( wfReadOnly() ) {
1614                         $wgOut->readOnlyPage( $this->getContent( true ) );
1615                         return;
1616                 }
1617                 $dbw =& wfGetDB( DB_MASTER );
1618
1619                 # Enhanced rollback, marks edits rc_bot=1
1620                 $bot = $wgRequest->getBool( 'bot' );
1621
1622                 # Replace all this user's current edits with the next one down
1623                 $tt = $this->mTitle->getDBKey();
1624                 $n = $this->mTitle->getNamespace();
1625
1626                 # Get the last editor, lock table exclusively
1627                 $s = $dbw->getArray( 'cur',
1628                         array( 'cur_id','cur_user','cur_user_text','cur_comment' ),
1629                         array( 'cur_title' => $tt, 'cur_namespace' => $n ),
1630                         $fname, 'FOR UPDATE'
1631                 );
1632                 if( $s === false ) {
1633                         # Something wrong
1634                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
1635                         return;
1636                 }
1637                 $ut = $dbw->strencode( $s->cur_user_text );
1638                 $uid = $s->cur_user;
1639                 $pid = $s->cur_id;
1640
1641                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
1642                 if( $from != $s->cur_user_text ) {
1643                         $wgOut->setPageTitle(wfmsg('rollbackfailed'));
1644                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
1645                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
1646                                 htmlspecialchars( $from ),
1647                                 htmlspecialchars( $s->cur_user_text ) ) );
1648                         if($s->cur_comment != '') {
1649                                 $wgOut->addHTML(
1650                                         wfMsg('editcomment',
1651                                         htmlspecialchars( $s->cur_comment ) ) );
1652                         }
1653                         return;
1654                 }
1655
1656                 # Get the last edit not by this guy
1657                 $s = $dbw->getArray( 'old',
1658                         array( 'old_text','old_user','old_user_text','old_timestamp','old_flags' ),
1659                         array(
1660                                 'old_namespace' => $n,
1661                                 'old_title' => $tt,
1662                                 "old_user <> {$uid} OR old_user_text <> '{$ut}'"
1663                         ), $fname, array( 'FOR UPDATE', 'USE INDEX' => 'name_title_timestamp' )
1664                 );
1665                 if( $s === false ) {
1666                         # Something wrong
1667                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
1668                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
1669                         return;
1670                 }
1671
1672                 if ( $bot ) {
1673                         # Mark all reverted edits as bot
1674                         $dbw->updateArray( 'recentchanges',
1675                                 array( /* SET */
1676                                         'rc_bot' => 1
1677                                 ), array( /* WHERE */
1678                                         'rc_user' => $uid,
1679                                         "rc_timestamp > '{$s->old_timestamp}'",
1680                                 ), $fname
1681                         );
1682                 }
1683
1684                 # Save it!
1685                 $newcomment = wfMsg( 'revertpage', $s->old_user_text, $from );
1686                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1687                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1688                 $wgOut->addHTML( '<h2>' . $newcomment . "</h2>\n<hr />\n" );
1689                 $this->updateArticle( Article::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1690                 Article::onArticleEdit( $this->mTitle );
1691                 $wgOut->returnToMain( false );
1692         }
1693
1694
1695         # Do standard deferred updates after page view
1696
1697         /* private */ function viewUpdates() {
1698                 global $wgDeferredUpdateList;
1699                 if ( 0 != $this->getID() ) {
1700                         global $wgDisableCounters;
1701                         if( !$wgDisableCounters ) {
1702                                 Article::incViewCount( $this->getID() );
1703                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1704                                 array_push( $wgDeferredUpdateList, $u );
1705                         }
1706                 }
1707                 $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(),
1708                   $this->mTitle->getDBkey() );
1709                 array_push( $wgDeferredUpdateList, $u );
1710         }
1711
1712         # Do standard deferred updates after page edit.
1713         # Every 1000th edit, prune the recent changes table.
1714
1715         /* private */ function editUpdates( $text ) {
1716                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1717                 global $wgMessageCache;
1718
1719                 wfSeedRandom();
1720                 if ( 0 == mt_rand( 0, 999 ) ) {
1721                         $dbw =& wfGetDB( DB_MASTER );
1722                         $cutoff = wfUnix2Timestamp( time() - ( 7 * 86400 ) );
1723                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1724                         $dbw->query( $sql );
1725                 }
1726                 $id = $this->getID();
1727                 $title = $this->mTitle->getPrefixedDBkey();
1728                 $shortTitle = $this->mTitle->getDBkey();
1729
1730                 $adj = $this->mCountAdjustment;
1731
1732                 if ( 0 != $id ) {
1733                         $u = new LinksUpdate( $id, $title );
1734                         array_push( $wgDeferredUpdateList, $u );
1735                         $u = new SiteStatsUpdate( 0, 1, $adj );
1736                         array_push( $wgDeferredUpdateList, $u );
1737                         $u = new SearchUpdate( $id, $title, $text );
1738                         array_push( $wgDeferredUpdateList, $u );
1739
1740                         $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle );
1741                         array_push( $wgDeferredUpdateList, $u );
1742
1743                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1744                                 $wgMessageCache->replace( $shortTitle, $text );
1745                         }
1746                 }
1747         }
1748
1749         /* private */ function setOldSubtitle() {
1750                 global $wgLang, $wgOut;
1751
1752                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1753                 $r = wfMsg( 'revisionasof', $td );
1754                 $wgOut->setSubtitle( "({$r})" );
1755         }
1756
1757         # This function is called right before saving the wikitext,
1758         # so we can do things like signatures and links-in-context.
1759
1760         function preSaveTransform( $text ) {
1761                 global $wgParser, $wgUser;
1762                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
1763         }
1764
1765         /* Caching functions */
1766
1767         # checkLastModified returns true if it has taken care of all
1768         # output to the client that is necessary for this request.
1769         # (that is, it has sent a cached version of the page)
1770         function tryFileCache() {
1771                 static $called = false;
1772                 if( $called ) {
1773                         wfDebug( " tryFileCache() -- called twice!?\n" );
1774                         return;
1775                 }
1776                 $called = true;
1777                 if($this->isFileCacheable()) {
1778                         $touched = $this->mTouched;
1779                         if( $this->mTitle->getPrefixedDBkey() == wfMsg( 'mainpage' ) ) {
1780                                 # Expire the main page quicker
1781                                 $expire = wfUnix2Timestamp( time() - 3600 );
1782                                 $touched = max( $expire, $touched );
1783                         }
1784                         $cache = new CacheManager( $this->mTitle );
1785                         if($cache->isFileCacheGood( $touched )) {
1786                                 global $wgOut;
1787                                 wfDebug( " tryFileCache() - about to load\n" );
1788                                 $cache->loadFromFileCache();
1789                                 return true;
1790                         } else {
1791                                 wfDebug( " tryFileCache() - starting buffer\n" );
1792                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1793                         }
1794                 } else {
1795                         wfDebug( " tryFileCache() - not cacheable\n" );
1796                 }
1797         }
1798
1799         function isFileCacheable() {
1800                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
1801                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
1802
1803                 return $wgUseFileCache
1804                         and (!$wgShowIPinHeader)
1805                         and ($this->getID() != 0)
1806                         and ($wgUser->getId() == 0)
1807                         and (!$wgUser->getNewtalk())
1808                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
1809                         and (empty( $action ) || $action == 'view')
1810                         and (!isset($oldid))
1811                         and (!isset($diff))
1812                         and (!isset($redirect))
1813                         and (!isset($printable))
1814                         and (!$this->mRedirectedFrom);
1815         }
1816
1817         # Loads cur_touched and returns a value indicating if it should be used
1818         function checkTouched() {
1819                 $fname = 'Article::checkTouched';
1820                 $id = $this->getID();
1821                 $dbr =& $this->getDB();
1822                 $s = $dbr->getArray( 'cur', array( 'cur_touched', 'cur_is_redirect' ),
1823                         array( 'cur_id' => $id ), $fname, $this->getSelectOptions() );
1824                 if( $s !== false ) {
1825                         $this->mTouched = wfTimestamp(TS_MW,$s->cur_touched);
1826                         return !$s->cur_is_redirect;
1827                 } else {
1828                         return false;
1829                 }
1830         }
1831
1832         # Edit an article without doing all that other stuff
1833         function quickEdit( $text, $comment = '', $minor = 0 ) {
1834                 global $wgUser, $wgMwRedir;
1835                 $fname = 'Article::quickEdit';
1836                 wfProfileIn( $fname );
1837
1838                 $dbw =& wfGetDB( DB_MASTER );
1839                 $ns = $this->mTitle->getNamespace();
1840                 $dbkey = $this->mTitle->getDBkey();
1841                 $encDbKey = $dbw->strencode( $dbkey );
1842                 $timestamp = wfTimestampNow();
1843
1844                 # Save to history
1845                 $dbw->insertSelect( 'old', 'cur',
1846                         array(
1847                                 'old_namespace' => 'cur_namespace',
1848                                 'old_title' => 'cur_title',
1849                                 'old_text' => 'cur_text',
1850                                 'old_comment' => 'cur_comment',
1851                                 'old_user' => 'cur_user',
1852                                 'old_user_text' => 'cur_user_text',
1853                                 'old_timestamp' => 'cur_timestamp',
1854                                 'inverse_timestamp' => '99999999999999-cur_timestamp',
1855                         ), array(
1856                                 'cur_namespace' => $ns,
1857                                 'cur_title' => $dbkey,
1858                         ), $fname
1859                 );
1860
1861                 # Use the affected row count to determine if the article is new
1862                 $numRows = $dbw->affectedRows();
1863
1864                 # Make an array of fields to be inserted
1865                 $fields = array(
1866                         'cur_text' => $text,
1867                         'cur_timestamp' => $timestamp,
1868                         'cur_user' => $wgUser->getID(),
1869                         'cur_user_text' => $wgUser->getName(),
1870                         'inverse_timestamp' => wfInvertTimestamp( $timestamp ),
1871                         'cur_comment' => $comment,
1872                         'cur_is_redirect' => $wgMwRedir->matchStart( $text ) ? 1 : 0,
1873                         'cur_minor_edit' => intval($minor),
1874                         'cur_touched' => $dbw->timestamp($timestamp),
1875                 );
1876
1877                 if ( $numRows ) {
1878                         # Update article
1879                         $fields['cur_is_new'] = 0;
1880                         $dbw->updateArray( 'cur', $fields, array( 'cur_namespace' => $ns, 'cur_title' => $dbkey ), $fname );
1881                 } else {
1882                         # Insert new article
1883                         $fields['cur_is_new'] = 1;
1884                         $fields['cur_namespace'] = $ns;
1885                         $fields['cur_title'] = $dbkey;
1886                         $fields['cur_random'] = $rand = number_format( mt_rand() / mt_getrandmax(), 12, '.', '' );
1887                         $dbw->insertArray( 'cur', $fields, $fname );
1888                 }
1889                 wfProfileOut( $fname );
1890         }
1891
1892         /* static */ function incViewCount( $id ) {
1893                 $id = intval( $id );
1894                 global $wgHitcounterUpdateFreq;
1895
1896                 $dbw =& wfGetDB( DB_MASTER );
1897                 $curTable = $dbw->tableName( 'cur' );
1898                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
1899                 $acchitsTable = $dbw->tableName( 'acchits' );
1900
1901                 if( $wgHitcounterUpdateFreq <= 1 ){ //
1902                         $dbw->query( "UPDATE $curTable SET cur_counter = cur_counter + 1 WHERE cur_id = $id" );
1903                         return;
1904                 }
1905
1906                 # Not important enough to warrant an error page in case of failure
1907                 $oldignore = $dbw->ignoreErrors( true );
1908
1909                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
1910
1911                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
1912                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
1913                         # Most of the time (or on SQL errors), skip row count check
1914                         $dbw->ignoreErrors( $oldignore );
1915                         return;
1916                 }
1917
1918                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
1919                 $row = $dbw->fetchObject( $res );
1920                 $rown = intval( $row->n );
1921                 if( $rown >= $wgHitcounterUpdateFreq ){
1922                         wfProfileIn( 'Article::incViewCount-collect' );
1923                         $old_user_abort = ignore_user_abort( true );
1924
1925                         $dbw->query("LOCK TABLES $hitcounterTable WRITE");
1926                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable TYPE=HEAP ".
1927                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
1928                                 'GROUP BY hc_id');
1929                         $dbw->query("DELETE FROM $hitcounterTable");
1930                         $dbw->query('UNLOCK TABLES');
1931                         $dbw->query("UPDATE $curTable,$acchitsTable SET cur_counter=cur_counter + hc_n ".
1932                                 'WHERE cur_id = hc_id');
1933                         $dbw->query("DROP TABLE $acchitsTable");
1934
1935                         ignore_user_abort( $old_user_abort );
1936                         wfProfileOut( 'Article::incViewCount-collect' );
1937                 }
1938                 $dbw->ignoreErrors( $oldignore );
1939         }
1940
1941         # The onArticle*() functions are supposed to be a kind of hooks
1942         # which should be called whenever any of the specified actions
1943         # are done.
1944         #
1945         # This is a good place to put code to clear caches, for instance.
1946
1947         # This is called on page move and undelete, as well as edit
1948         /* static */ function onArticleCreate($title_obj) {
1949                 global $wgUseSquid, $wgDeferredUpdateList;
1950
1951                 $titles = $title_obj->getBrokenLinksTo();
1952
1953                 # Purge squid
1954                 if ( $wgUseSquid ) {
1955                         $urls = $title_obj->getSquidURLs();
1956                         foreach ( $titles as $linkTitle ) {
1957                                 $urls[] = $linkTitle->getInternalURL();
1958                         }
1959                         $u = new SquidUpdate( $urls );
1960                         array_push( $wgDeferredUpdateList, $u );
1961                 }
1962
1963                 # Clear persistent link cache
1964                 LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
1965         }
1966
1967         /* static */ function onArticleDelete($title_obj) {
1968                 LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
1969         }
1970
1971         /* static */ function onArticleEdit($title_obj) {
1972                 LinkCache::linksccClearPage( $title_obj->getArticleID() );
1973         }
1974
1975
1976         # Info about this page
1977
1978         function info() {
1979                 global $wgUser, $wgTitle, $wgOut, $wgLang, $wgAllowPageInfo;
1980                 $fname = 'Article::info';
1981
1982                 if ( !$wgAllowPageInfo ) {
1983                         $wgOut->errorpage( 'nosuchaction', 'nosuchactiontext' );
1984                         return;
1985                 }
1986
1987                 $dbr =& $this->getDB();
1988
1989                 $basenamespace = $wgTitle->getNamespace() & (~1);
1990                 $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace );
1991                 $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace );
1992                 $wl_clause  = array( 'wl_title' => $wgTitle->getDBkey(), 'wl_namespace' => $basenamespace );
1993                 $fullTitle = $wgTitle->makeName($basenamespace, $wgTitle->getDBKey());
1994                 $wgOut->setPagetitle(  $fullTitle );
1995                 $wgOut->setSubtitle( wfMsg( 'infosubtitle' ));
1996
1997                 # first, see if the page exists at all.
1998                 $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
1999                 if ($exists < 1) {
2000                         $wgOut->addHTML( wfMsg('noarticletext') );
2001                 } else {
2002                         $numwatchers = $dbr->selectField( 'watchlist', 'COUNT(*)', $wl_clause, $fname,
2003                                 $this->getSelectOptions() );
2004                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $numwatchers) . '</li>' );
2005                         $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2006                         $wgOut->addHTML( "<li>" . wfMsg('numedits', $old + 1) . '</li>');
2007
2008                         # to find number of distinct authors, we need to do some
2009                         # funny stuff because of the cur/old table split:
2010                         # - first, find the name of the 'cur' author
2011                         # - then, find the number of *other* authors in 'old'
2012
2013                         # find 'cur' author
2014                         $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2015                                 $this->getSelectOptions() );
2016
2017                         # find number of 'old' authors excluding 'cur' author
2018                         $authors = $dbr->selectField( 'old', 'COUNT(DISTINCT old_user_text)',
2019                                 $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ), $fname,
2020                                 $this->getSelectOptions() ) + 1;
2021
2022                         # now for the Talk page ...
2023                         $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace+1 );
2024                         $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace+1 );
2025
2026                         # does it exist?
2027                         $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname, $this->getSelectOptions() );
2028
2029                         # number of edits
2030                         if ($exists > 0) {
2031                                 $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname, $this->getSelectOptions() );
2032                                 $wgOut->addHTML( '<li>' . wfMsg("numtalkedits", $old + 1) . '</li>');
2033                         }
2034                         $wgOut->addHTML( '<li>' . wfMsg("numauthors", $authors) . '</li>' );
2035
2036                         # number of authors
2037                         if ($exists > 0) {
2038                                 $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname,
2039                                         $this->getSelectOptions() );
2040                                 $authors = $dbr->selectField( 'cur', 'COUNT(DISTINCT old_user_text)',
2041                                         $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ),
2042                                         $fname, $this->getSelectOptions() );
2043
2044                                 $wgOut->addHTML( '<li>' . wfMsg('numtalkauthors', $authors) . '</li></ul>' );
2045                         }
2046                 }
2047         }
2048 }
2049
2050 ?>