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