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