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 ) {
 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' => $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' => $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' => $now ), array( 'cur_namespace' => $talkns, 'cur_title' => $ttl ), $fname );
 803
 804                 # standard deferred updates
 805                 $this->editUpdates( $text );
 806
 807                 $this->showArticle( $text, wfMsg( 'newarticle' ) );
 808         }
 809
 810
 811         /* Side effects: loads last edit */
 812         function getTextOfLastEditWithSectionReplacedOrAdded($section, $text, $summary = '') {
 813                 $this->loadLastEdit();
 814                 $oldtext = $this->getContent( true );
 815                 if ($section != '') {
 816                         if($section=='new') {
 817                                 if($summary) $subject="== {$summary} ==\n\n";
 818                                 $text=$oldtext."\n\n".$subject.$text;
 819                         } else {
 820
 821                                 # strip NOWIKI etc. to avoid confusion (true-parameter causes HTML
 822                                 # comments to be stripped as well)
 823                                 $striparray=array();
 824                                 $parser=new Parser();
 825                                 $parser->mOutputType=OT_WIKI;
 826                                 $oldtext=$parser->strip($oldtext, $striparray, true);
 827
 828                                 # now that we can be sure that no pseudo-sections are in the source,
 829                                 # split it up
 830                                 # Unfortunately we can't simply do a preg_replace because that might
 831                                 # replace the wrong section, so we have to use the section counter instead
 832                                 $secs=preg_split('/(^=+.*?=+|^<h[1-6].*?' . '>.*?<\/h[1-6].*?' . '>)/mi',
 833                                   $oldtext,-1,PREG_SPLIT_DELIM_CAPTURE);
 834                                 $secs[$section*2]=$text."\n\n"; // replace with edited
 835
 836                                 # section 0 is top (intro) section
 837                                 if($section!=0) {
 838
 839                                         # headline of old section - we need to go through this section
 840                                         # to determine if there are any subsections that now need to
 841                                         # be erased, as the mother section has been replaced with
 842                                         # the text of all subsections.
 843                                         $headline=$secs[$section*2-1];
 844                                         preg_match( '/^(=+).*?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>/mi',$headline,$matches);
 845                                         $hlevel=$matches[1];
 846
 847                                         # determine headline level for wikimarkup headings
 848                                         if(strpos($hlevel,'=')!==false) {
 849                                                 $hlevel=strlen($hlevel);
 850                                         }
 851
 852                                         $secs[$section*2-1]=''; // erase old headline
 853                                         $count=$section+1;
 854                                         $break=false;
 855                                         while(!empty($secs[$count*2-1]) && !$break) {
 856
 857                                                 $subheadline=$secs[$count*2-1];
 858                                                 preg_match(
 859                                                  '/^(=+).*?=+|^<h([1-6]).*?' . '>.*?<\/h[1-6].*?' . '>/mi',$subheadline,$matches);
 860                                                 $subhlevel=$matches[1];
 861                                                 if(strpos($subhlevel,'=')!==false) {
 862                                                         $subhlevel=strlen($subhlevel);
 863                                                 }
 864                                                 if($subhlevel > $hlevel) {
 865                                                         // erase old subsections
 866                                                         $secs[$count*2-1]='';
 867                                                         $secs[$count*2]='';
 868                                                 }
 869                                                 if($subhlevel <= $hlevel) {
 870                                                         $break=true;
 871                                                 }
 872                                                 $count++;
 873
 874                                         }
 875
 876                                 }
 877                                 $text=join('',$secs);
 878                                 # reinsert the stuff that we stripped out earlier
 879                                 $text=$parser->unstrip($text,$striparray);
 880                                 $text=$parser->unstripNoWiki($text,$striparray);
 881                         }
 882
 883                 }
 884                 return $text;
 885         }
 886
 887         function updateArticle( $text, $summary, $minor, $watchthis, $forceBot = false, $sectionanchor = '' ) {
 888                 global $wgOut, $wgUser;
 889                 global $wgDBtransactions, $wgMwRedir;
 890                 global $wgUseSquid, $wgInternalServer;
 891
 892                 $fname = 'Article::updateArticle';
 893                 $good = true;
 894
 895                 if ( $this->mMinorEdit ) { $me1 = 1; } else { $me1 = 0; }
 896                 if ( $minor && $wgUser->getID() ) { $me2 = 1; } else { $me2 = 0; }
 897                 if ( preg_match( "/^((" . $wgMwRedir->getBaseRegex() . ')[^\\n]+)/i', $text, $m ) ) {
 898                         $redir = 1;
 899                         $text = $m[1] . "\n"; # Remove all content but redirect
 900                 }
 901                 else { $redir = 0; }
 902
 903                 $text = $this->preSaveTransform( $text );
 904                 $dbw =& wfGetDB( DB_MASTER );
 905
 906                 # Update article, but only if changed.
 907
 908                 # It's important that we either rollback or complete, otherwise an attacker could
 909                 # overwrite cur entries by sending precisely timed user aborts. Random bored users
 910                 # could conceivably have the same effect, especially if cur is locked for long periods.
 911                 if( $wgDBtransactions ) {
 912                         $dbw->query( 'BEGIN', $fname );
 913                 } else {
 914                         $userAbort = ignore_user_abort( true );
 915                 }
 916
 917                 $oldtext = $this->getContent( true );
 918
 919                 if ( 0 != strcmp( $text, $oldtext ) ) {
 920                         $this->mCountAdjustment = $this->isCountable( $text )
 921                           - $this->isCountable( $oldtext );
 922                         $now = wfTimestampNow();
 923                         $won = wfInvertTimestamp( $now );
 924
 925                         # First update the cur row
 926                         $dbw->updateArray( 'cur',
 927                                 array( /* SET */
 928                                         'cur_text' => $text,
 929                                         'cur_comment' => $summary,
 930                                         'cur_minor_edit' => $me2,
 931                                         'cur_user' => $wgUser->getID(),
 932                                         'cur_timestamp' => $now,
 933                                         'cur_user_text' => $wgUser->getName(),
 934                                         'cur_is_redirect' => $redir,
 935                                         'cur_is_new' => 0,
 936                                         'cur_touched' => $now,
 937                                         'inverse_timestamp' => $won
 938                                 ), array( /* WHERE */
 939                                         'cur_id' => $this->getID(),
 940                                         'cur_timestamp' => $this->getTimestamp()
 941                                 ), $fname
 942                         );
 943
 944                         if( $dbw->affectedRows() == 0 ) {
 945                                 /* Belated edit conflict! Run away!! */
 946                                 $good = false;
 947                         } else {
 948                                 # Now insert the previous revision into old
 949
 950                                 # This overwrites $oldtext if revision compression is on
 951                                 $flags = Article::compressRevisionText( $oldtext );
 952
 953                                 $dbw->insertArray( 'old',
 954                                         array(
 955                                                 'old_id' => $dbw->nextSequenceValue( 'old_old_id_seq' ),
 956                                                 'old_namespace' => $this->mTitle->getNamespace(),
 957                                                 'old_title' => $this->mTitle->getDBkey(),
 958                                                 'old_text' => $oldtext,
 959                                                 'old_comment' => $this->getComment(),
 960                                                 'old_user' => $this->getUser(),
 961                                                 'old_user_text' => $this->getUserText(),
 962                                                 'old_timestamp' => $this->getTimestamp(),
 963                                                 'old_minor_edit' => $me1,
 964                                                 'inverse_timestamp' => wfInvertTimestamp( $this->getTimestamp() ),
 965                                                 'old_flags' => $flags,
 966                                         ), $fname
 967                                 );
 968
 969                                 $oldid = $dbw->insertId();
 970
 971                                 $bot = (int)($wgUser->isBot() || $forceBot);
 972                                 RecentChange::notifyEdit( $now, $this->mTitle, $me2, $wgUser, $summary,
 973                                         $oldid, $this->getTimestamp(), $bot );
 974                                 Article::onArticleEdit( $this->mTitle );
 975                         }
 976                 }
 977
 978                 if( $wgDBtransactions ) {
 979                         $dbw->query( 'COMMIT', $fname );
 980                 } else {
 981                         ignore_user_abort( $userAbort );
 982                 }
 983
 984                 if ( $good ) {
 985                 if ($watchthis) {
 986                         if (!$this->mTitle->userIsWatching()) $this->watch();
 987                 } else {
 988                         if ( $this->mTitle->userIsWatching() ) {
 989                                 $this->unwatch();
 990                         }
 991                 }
 992                 # standard deferred updates
 993                 $this->editUpdates( $text );
 994
 995
 996                 $urls = array();
 997                 # Template namespace
 998                 # Purge all articles linking here
 999                 if ( $this->mTitle->getNamespace() == NS_TEMPLATE) {
1000                         $titles = $this->mTitle->getLinksTo();
1001                         Title::touchArray( $titles );
1002                         if ( $wgUseSquid ) {
1003                                         foreach ( $titles as $title ) {
1004                                                 $urls[] = $title->getInternalURL();
1005                                         }
1006                         }
1007                 }
1008
1009                 # Squid updates
1010                 if ( $wgUseSquid ) {
1011                         $urls = array_merge( $urls, $this->mTitle->getSquidURLs() );
1012                         $u = new SquidUpdate( $urls );
1013                         $u->doUpdate();
1014                 }
1015
1016                 $this->showArticle( $text, wfMsg( 'updated' ), $sectionanchor );
1017                 }
1018                 return $good;
1019         }
1020
1021         # After we've either updated or inserted the article, update
1022         # the link tables and redirect to the new page.
1023
1024         function showArticle( $text, $subtitle , $sectionanchor = '' ) {
1025                 global $wgOut, $wgUser, $wgLinkCache;
1026                 global $wgMwRedir;
1027
1028                 $wgLinkCache = new LinkCache();
1029                 # Select for update
1030                 $wgLinkCache->forUpdate( true );
1031
1032                 # Get old version of link table to allow incremental link updates
1033                 $wgLinkCache->preFill( $this->mTitle );
1034                 $wgLinkCache->clear();
1035
1036                 # Parse the text and replace links with placeholders
1037                 $wgOut = new OutputPage();
1038                 $wgOut->addWikiText( $text );
1039
1040                 # Look up the links in the DB and add them to the link cache
1041                 $wgOut->replaceLinkHolders( RLH_FOR_UPDATE );
1042
1043                 if( $wgMwRedir->matchStart( $text ) )
1044                         $r = 'redirect=no';
1045                 else
1046                         $r = '';
1047                 $wgOut->redirect( $this->mTitle->getFullURL( $r ).$sectionanchor );
1048         }
1049
1050         # Validate article
1051
1052         function validate () {
1053                 global $wgOut ;
1054                 $wgOut->setPagetitle( wfMsg( 'validate' ) . ": " . $this->mTitle->getPrefixedText()  );
1055                 $wgOut->setRobotpolicy( 'noindex,follow' );
1056                 if ( $this->mTitle->getNamespace() != 0 )
1057                         {
1058                         $wgOut->addHTML ( wfMsg ( 'val_validate_article_namespace_only' ) ) ;
1059                         return ;
1060                         }
1061                 $v = new Validation ;
1062                 $v->validate_form ( $this->mTitle->getDBkey() ) ;
1063         }
1064
1065         # Mark this particular edit as patrolled
1066         function markpatrolled() {
1067                 global $wgOut, $wgRequest, $wgOnlySysopsCanPatrol, $wgUseRCPatrol, $wgUser;
1068                 $wgOut->setRobotpolicy( 'noindex,follow' );
1069
1070                 if ( !$wgUseRCPatrol )
1071                 {
1072                         $wgOut->errorpage( 'rcpatroldisabled', 'rcpatroldisabledtext' );
1073                         return;
1074                 }
1075                 if ( $wgUser->getID() == 0 )
1076                 {
1077                         $wgOut->loginToUse();
1078                         return;
1079                 }
1080                 if ( $wgOnlySysopsCanPatrol && !$wgUser->isSysop() )
1081                 {
1082                         $wgOut->sysopRequired();
1083                         return;
1084                 }
1085                 $rcid = $wgRequest->getVal( 'rcid' );
1086                 if ( !is_null ( $rcid ) )
1087                 {
1088                         RecentChange::markPatrolled( $rcid );
1089                         $wgOut->setPagetitle( wfMsg( 'markedaspatrolled' ) );
1090                         $wgOut->addWikiText( wfMsg( 'markedaspatrolledtext' ) );
1091                         $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1092                 }
1093                 else
1094                 {
1095                         $wgOut->errorpage( 'markedaspatrollederror', 'markedaspatrollederrortext' );
1096                 }
1097         }
1098
1099
1100         # Add this page to my watchlist
1101
1102         function watch( $add = true ) {
1103                 global $wgUser, $wgOut, $wgLang;
1104                 global $wgDeferredUpdateList;
1105
1106                 if ( 0 == $wgUser->getID() ) {
1107                         $wgOut->errorpage( 'watchnologin', 'watchnologintext' );
1108                         return;
1109                 }
1110                 if ( wfReadOnly() ) {
1111                         $wgOut->readOnlyPage();
1112                         return;
1113                 }
1114                 if( $add )
1115                         $wgUser->addWatch( $this->mTitle );
1116                 else
1117                         $wgUser->removeWatch( $this->mTitle );
1118
1119                 $wgOut->setPagetitle( wfMsg( $add ? 'addedwatch' : 'removedwatch' ) );
1120                 $wgOut->setRobotpolicy( 'noindex,follow' );
1121
1122                 $sk = $wgUser->getSkin() ;
1123                 $link = $this->mTitle->getPrefixedText();
1124
1125                 if($add)
1126                         $text = wfMsg( 'addedwatchtext', $link );
1127                 else
1128                         $text = wfMsg( 'removedwatchtext', $link );
1129                 $wgOut->addWikiText( $text );
1130
1131                 $up = new UserUpdate();
1132                 array_push( $wgDeferredUpdateList, $up );
1133
1134                 $wgOut->returnToMain( true, $this->mTitle->getPrefixedText() );
1135         }
1136
1137         function unwatch() {
1138                 $this->watch( false );
1139         }
1140
1141         # protect a page
1142
1143         function protect( $limit = 'sysop' ) {
1144                 global $wgUser, $wgOut, $wgRequest;
1145
1146                 if ( ! $wgUser->isSysop() ) {
1147                         $wgOut->sysopRequired();
1148                         return;
1149                 }
1150                 if ( wfReadOnly() ) {
1151                         $wgOut->readOnlyPage();
1152                         return;
1153                 }
1154                 $id = $this->mTitle->getArticleID();
1155                 if ( 0 == $id ) {
1156                         $wgOut->fatalError( wfMsg( 'badarticleerror' ) );
1157                         return;
1158                 }
1159
1160                 $confirm = $wgRequest->getBool( 'wpConfirmProtect' ) && $wgRequest->wasPosted();
1161                 $reason = $wgRequest->getText( 'wpReasonProtect' );
1162
1163                 if ( $confirm ) {
1164                         $dbw =& wfGetDB( DB_MASTER );
1165                         $dbw->updateArray( 'cur',
1166                                 array( /* SET */
1167                                         'cur_touched' => wfTimestampNow(),
1168                                         'cur_restrictions' => (string)$limit
1169                                 ), array( /* WHERE */
1170                                         'cur_id' => $id
1171                                 ), 'Article::protect'
1172                         );
1173
1174                         $log = new LogPage( wfMsg( 'protectlogpage' ), wfMsg( 'protectlogtext' ) );
1175                         if ( $limit === "" ) {
1176                                         $log->addEntry( wfMsg( 'unprotectedarticle', $this->mTitle->getPrefixedText() ), $reason );
1177                         } else {
1178                                         $log->addEntry( wfMsg( 'protectedarticle', $this->mTitle->getPrefixedText() ), $reason );
1179                         }
1180                         $wgOut->redirect( $this->mTitle->getFullURL() );
1181                         return;
1182                 } else {
1183                         $reason = htmlspecialchars( wfMsg( 'protectreason' ) );
1184                         return $this->confirmProtect( '', $reason, $limit );
1185                 }
1186         }
1187
1188         # Output protection confirmation dialog
1189
1190         function confirmProtect( $par, $reason, $limit = 'sysop'  ) {
1191                 global $wgOut;
1192
1193                 wfDebug( "Article::confirmProtect\n" );
1194
1195                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1196                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1197
1198                 $check = '';
1199                 $protcom = '';
1200
1201                 if ( $limit === '' ) {
1202                         $wgOut->setPageTitle( wfMsg( 'confirmunprotect' ) );
1203                         $wgOut->setSubtitle( wfMsg( 'unprotectsub', $sub ) );
1204                         $wgOut->addWikiText( wfMsg( 'confirmunprotecttext' ) );
1205                         $check = htmlspecialchars( wfMsg( 'confirmunprotect' ) );
1206                         $protcom = htmlspecialchars( wfMsg( 'unprotectcomment' ) );
1207                         $formaction = $this->mTitle->escapeLocalURL( 'action=unprotect' . $par );
1208                 } else {
1209                         $wgOut->setPageTitle( wfMsg( 'confirmprotect' ) );
1210                         $wgOut->setSubtitle( wfMsg( 'protectsub', $sub ) );
1211                         $wgOut->addWikiText( wfMsg( 'confirmprotecttext' ) );
1212                         $check = htmlspecialchars( wfMsg( 'confirmprotect' ) );
1213                         $protcom = htmlspecialchars( wfMsg( 'protectcomment' ) );
1214                         $formaction = $this->mTitle->escapeLocalURL( 'action=protect' . $par );
1215                 }
1216
1217                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1218
1219                 $wgOut->addHTML( "
1220 <form id='protectconfirm' method='post' action=\"{$formaction}\">
1221         <table border='0'>
1222                 <tr>
1223                         <td align='right'>
1224                                 <label for='wpReasonProtect'>{$protcom}:</label>
1225                         </td>
1226                         <td align='left'>
1227                                 <input type='text' size='60' name='wpReasonProtect' id='wpReasonProtect' value=\"" . htmlspecialchars( $reason ) . "\" />
1228                         </td>
1229                 </tr>
1230                 <tr>
1231                         <td>&nbsp;</td>
1232                 </tr>
1233                 <tr>
1234                         <td align='right'>
1235                                 <input type='checkbox' name='wpConfirmProtect' value='1' id='wpConfirmProtect' />
1236                         </td>
1237                         <td>
1238                                 <label for='wpConfirmProtect'>{$check}</label>
1239                         </td>
1240                 </tr>
1241                 <tr>
1242                         <td>&nbsp;</td>
1243                         <td>
1244                                 <input type='submit' name='wpConfirmProtectB' value=\"{$confirm}\" />
1245                         </td>
1246                 </tr>
1247         </table>
1248 </form>\n" );
1249
1250                 $wgOut->returnToMain( false );
1251         }
1252
1253         function unprotect() {
1254                 return $this->protect( '' );
1255         }
1256
1257         # UI entry point for page deletion
1258
1259         function delete() {
1260                 global $wgUser, $wgOut, $wgMessageCache, $wgRequest;
1261                 $fname = 'Article::delete';
1262                 $confirm = $wgRequest->getBool( 'wpConfirm' ) && $wgRequest->wasPosted();
1263                 $reason = $wgRequest->getText( 'wpReason' );
1264
1265                 # This code desperately needs to be totally rewritten
1266
1267                 # Check permissions
1268                 if ( ( ! $wgUser->isSysop() ) ) {
1269                         $wgOut->sysopRequired();
1270                         return;
1271                 }
1272                 if ( wfReadOnly() ) {
1273                         $wgOut->readOnlyPage();
1274                         return;
1275                 }
1276
1277                 # Better double-check that it hasn't been deleted yet!
1278                 $wgOut->setPagetitle( wfMsg( 'confirmdelete' ) );
1279                 if ( ( '' == trim( $this->mTitle->getText() ) )
1280                   or ( $this->mTitle->getArticleId() == 0 ) ) {
1281                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1282                         return;
1283                 }
1284
1285                 if ( $confirm ) {
1286                         $this->doDelete( $reason );
1287                         return;
1288                 }
1289
1290                 # determine whether this page has earlier revisions
1291                 # and insert a warning if it does
1292                 # we select the text because it might be useful below
1293                 $dbr =& wfGetDB( DB_SLAVE );
1294                 $ns = $this->mTitle->getNamespace();
1295                 $title = $this->mTitle->getDBkey();
1296                 $old = $dbr->getArray( 'old',
1297                         array( 'old_text', 'old_flags' ),
1298                         array(
1299                                 'old_namespace' => $ns,
1300                                 'old_title' => $title,
1301                         ), $fname, array( 'ORDER BY' => 'inverse_timestamp' )
1302                 );
1303
1304                 if( $old !== false && !$confirm ) {
1305                         $skin=$wgUser->getSkin();
1306                         $wgOut->addHTML('<b>'.wfMsg('historywarning'));
1307                         $wgOut->addHTML( $skin->historyLink() .'</b>');
1308                 }
1309
1310                 # Fetch cur_text
1311                 $s = $dbr->getArray( 'cur',
1312                         array( 'cur_text' ),
1313                         array(
1314                                 'cur_namespace' => $ns,
1315                                 'cur_title' => $title,
1316                         ), $fname
1317                 );
1318
1319                 if( $s !== false ) {
1320                         # if this is a mini-text, we can paste part of it into the deletion reason
1321
1322                         #if this is empty, an earlier revision may contain "useful" text
1323                         $blanked = false;
1324                         if($s->cur_text != '') {
1325                                 $text=$s->cur_text;
1326                         } else {
1327                                 if($old) {
1328                                         $text = Article::getRevisionText( $old );
1329                                         $blanked = true;
1330                                 }
1331
1332                         }
1333
1334                         $length=strlen($text);
1335
1336                         # this should not happen, since it is not possible to store an empty, new
1337                         # page. Let's insert a standard text in case it does, though
1338                         if($length == 0 && $reason === '') {
1339                                 $reason = wfMsg('exblank');
1340                         }
1341
1342                         if($length < 500 && $reason === '') {
1343
1344                                 # comment field=255, let's grep the first 150 to have some user
1345                                 # space left
1346                                 $text=substr($text,0,150);
1347                                 # let's strip out newlines and HTML tags
1348                                 $text=preg_replace('/\"/',"'",$text);
1349                                 $text=preg_replace('/\</','&lt;',$text);
1350                                 $text=preg_replace('/\>/','&gt;',$text);
1351                                 $text=preg_replace("/[\n\r]/",'',$text);
1352                                 if(!$blanked) {
1353                                         $reason=wfMsg('excontent'). " '".$text;
1354                                 } else {
1355                                         $reason=wfMsg('exbeforeblank') . " '".$text;
1356                                 }
1357                                 if($length>150) { $reason .= '...'; } # we've only pasted part of the text
1358                                 $reason.="'";
1359                         }
1360                 }
1361
1362                 return $this->confirmDelete( '', $reason );
1363         }
1364
1365         # Output deletion confirmation dialog
1366
1367         function confirmDelete( $par, $reason ) {
1368                 global $wgOut;
1369
1370                 wfDebug( "Article::confirmDelete\n" );
1371
1372                 $sub = htmlspecialchars( $this->mTitle->getPrefixedText() );
1373                 $wgOut->setSubtitle( wfMsg( 'deletesub', $sub ) );
1374                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1375                 $wgOut->addWikiText( wfMsg( 'confirmdeletetext' ) );
1376
1377                 $formaction = $this->mTitle->escapeLocalURL( 'action=delete' . $par );
1378
1379                 $confirm = htmlspecialchars( wfMsg( 'confirm' ) );
1380                 $check = htmlspecialchars( wfMsg( 'confirmcheck' ) );
1381                 $delcom = htmlspecialchars( wfMsg( 'deletecomment' ) );
1382
1383                 $wgOut->addHTML( "
1384 <form id='deleteconfirm' method='post' action=\"{$formaction}\">
1385         <table border='0'>
1386                 <tr>
1387                         <td align='right'>
1388                                 <label for='wpReason'>{$delcom}:</label>
1389                         </td>
1390                         <td align='left'>
1391                                 <input type='text' size='60' name='wpReason' id='wpReason' value=\"" . htmlspecialchars( $reason ) . "\" />
1392                         </td>
1393                 </tr>
1394                 <tr>
1395                         <td>&nbsp;</td>
1396                 </tr>
1397                 <tr>
1398                         <td align='right'>
1399                                 <input type='checkbox' name='wpConfirm' value='1' id='wpConfirm' />
1400                         </td>
1401                         <td>
1402                                 <label for='wpConfirm'>{$check}</label>
1403                         </td>
1404                 </tr>
1405                 <tr>
1406                         <td>&nbsp;</td>
1407                         <td>
1408                                 <input type='submit' name='wpConfirmB' value=\"{$confirm}\" />
1409                         </td>
1410                 </tr>
1411         </table>
1412 </form>\n" );
1413
1414                 $wgOut->returnToMain( false );
1415         }
1416
1417
1418         # Perform a deletion and output success or failure messages
1419
1420         function doDelete( $reason ) {
1421                 global $wgOut, $wgUser, $wgLang;
1422                 $fname = 'Article::doDelete';
1423                 wfDebug( "$fname\n" );
1424
1425                 if ( $this->doDeleteArticle( $reason ) ) {
1426                         $deleted = $this->mTitle->getPrefixedText();
1427
1428                         $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1429                         $wgOut->setRobotpolicy( 'noindex,nofollow' );
1430
1431                         $sk = $wgUser->getSkin();
1432                         $loglink = $sk->makeKnownLink( $wgLang->getNsText( NS_WIKIPEDIA ) .
1433                           ':' . wfMsg( 'dellogpage' ), wfMsg( 'deletionlog' ) );
1434
1435                         $text = wfMsg( "deletedtext", $deleted, $loglink );
1436
1437                         $wgOut->addHTML( '<p>' . $text . "</p>\n" );
1438                         $wgOut->returnToMain( false );
1439                 } else {
1440                         $wgOut->fatalError( wfMsg( 'cannotdelete' ) );
1441                 }
1442         }
1443
1444         # Back-end article deletion
1445         # Deletes the article with database consistency, writes logs, purges caches
1446         # Returns success
1447         function doDeleteArticle( $reason ) {
1448                 global $wgUser, $wgLang;
1449                 global  $wgUseSquid, $wgDeferredUpdateList, $wgInternalServer;
1450
1451                 $fname = 'Article::doDeleteArticle';
1452                 wfDebug( $fname."\n" );
1453
1454                 $dbw =& wfGetDB( DB_MASTER );
1455                 $ns = $this->mTitle->getNamespace();
1456                 $t = $this->mTitle->getDBkey();
1457                 $id = $this->mTitle->getArticleID();
1458
1459                 if ( $t == '' || $id == 0 ) {
1460                         return false;
1461                 }
1462
1463                 $u = new SiteStatsUpdate( 0, 1, -$this->isCountable( $this->getContent( true ) ) );
1464                 array_push( $wgDeferredUpdateList, $u );
1465
1466                 $linksTo = $this->mTitle->getLinksTo();
1467
1468                 # Squid purging
1469                 if ( $wgUseSquid ) {
1470                         $urls = array(
1471                                 $this->mTitle->getInternalURL(),
1472                                 $this->mTitle->getInternalURL( 'history' )
1473                         );
1474                         foreach ( $linksTo as $linkTo ) {
1475                                 $urls[] = $linkTo->getInternalURL();
1476                         }
1477
1478                         $u = new SquidUpdate( $urls );
1479                         array_push( $wgDeferredUpdateList, $u );
1480
1481                 }
1482
1483                 # Client and file cache invalidation
1484                 Title::touchArray( $linksTo );
1485
1486                 # Move article and history to the "archive" table
1487                 $archiveTable = $dbw->tableName( 'archive' );
1488                 $oldTable = $dbw->tableName( 'old' );
1489                 $curTable = $dbw->tableName( 'cur' );
1490                 $recentchangesTable = $dbw->tableName( 'recentchanges' );
1491                 $linksTable = $dbw->tableName( 'links' );
1492                 $brokenlinksTable = $dbw->tableName( 'brokenlinks' );
1493
1494                 $dbw->insertSelect( 'archive', 'cur',
1495                         array(
1496                                 'ar_namespace' => 'cur_namespace',
1497                                 'ar_title' => 'cur_title',
1498                                 'ar_text' => 'cur_text',
1499                                 'ar_comment' => 'cur_comment',
1500                                 'ar_user' => 'cur_user',
1501                                 'ar_user_text' => 'cur_user_text',
1502                                 'ar_timestamp' => 'cur_timestamp',
1503                                 'ar_minor_edit' => 'cur_minor_edit',
1504                                 'ar_flags' => 0,
1505                         ), array(
1506                                 'cur_namespace' => $ns,
1507                                 'cur_title' => $t,
1508                         ), $fname
1509                 );
1510
1511                 $dbw->insertSelect( 'archive', 'old',
1512                         array(
1513                                 'ar_namespace' => 'old_namespace',
1514                                 'ar_title' => 'old_title',
1515                                 'ar_text' => 'old_text',
1516                                 'ar_comment' => 'old_comment',
1517                                 'ar_user' => 'old_user',
1518                                 'ar_user_text' => 'old_user_text',
1519                                 'ar_timestamp' => 'old_timestamp',
1520                                 'ar_minor_edit' => 'old_minor_edit',
1521                                 'ar_flags' => 'old_flags'
1522                         ), array(
1523                                 'old_namespace' => $ns,
1524                                 'old_title' => $t,
1525                         ), $fname
1526                 );
1527
1528                 # Now that it's safely backed up, delete it
1529
1530                 $dbw->delete( 'cur', array( 'cur_namespace' => $ns, 'cur_title' => $t ), $fname );
1531                 $dbw->delete( 'old', array( 'old_namespace' => $ns, 'old_title' => $t ), $fname );
1532                 $dbw->delete( 'recentchanges', array( 'rc_namespace' => $ns, 'rc_title' => $t ), $fname );
1533
1534                 # Finally, clean up the link tables
1535                 $t = $this->mTitle->getPrefixedDBkey();
1536
1537                 Article::onArticleDelete( $this->mTitle );
1538
1539                 # Insert broken links
1540                 $brokenLinks = array();
1541                 foreach ( $linksTo as $titleObj ) {
1542                         # Get article ID. Efficient because it was loaded into the cache by getLinksTo().
1543                         $linkID = $titleObj->getArticleID();
1544                         $brokenLinks[] = array( 'bl_from' => $linkID, 'bl_to' => $t );
1545                 }
1546                 $dbw->insert( 'brokenlinks', $brokenLinks, $fname, 'IGNORE' );
1547
1548                 # Delete live links
1549                 $dbw->delete( 'links', array( 'l_to' => $id ) );
1550                 $dbw->delete( 'links', array( 'l_from' => $id ) );
1551                 $dbw->delete( 'imagelinks', array( 'il_from' => $id ) );
1552                 $dbw->delete( 'brokenlinks', array( 'bl_from' => $id ) );
1553                 $dbw->delete( 'categorylinks', array( 'cl_from' => $id ) );
1554
1555                 # Log the deletion
1556                 $log = new LogPage( wfMsg( 'dellogpage' ), wfMsg( 'dellogpagetext' ) );
1557                 $art = $this->mTitle->getPrefixedText();
1558                 $log->addEntry( wfMsg( 'deletedarticle', $art ), $reason );
1559
1560                 # Clear the cached article id so the interface doesn't act like we exist
1561                 $this->mTitle->resetArticleID( 0 );
1562                 $this->mTitle->mArticleID = 0;
1563                 return true;
1564         }
1565
1566         function rollback() {
1567                 global $wgUser, $wgLang, $wgOut, $wgRequest;
1568                 $fname = "Article::rollback";
1569
1570                 if ( ! $wgUser->isSysop() ) {
1571                         $wgOut->sysopRequired();
1572                         return;
1573                 }
1574                 if ( wfReadOnly() ) {
1575                         $wgOut->readOnlyPage( $this->getContent( true ) );
1576                         return;
1577                 }
1578                 $dbw =& wfGetDB( DB_MASTER );
1579
1580                 # Enhanced rollback, marks edits rc_bot=1
1581                 $bot = $wgRequest->getBool( 'bot' );
1582
1583                 # Replace all this user's current edits with the next one down
1584                 $tt = $this->mTitle->getDBKey();
1585                 $n = $this->mTitle->getNamespace();
1586
1587                 # Get the last editor, lock table exclusively
1588                 $s = $dbw->getArray( 'cur',
1589                         array( 'cur_id','cur_user','cur_user_text','cur_comment' ),
1590                         array( 'cur_title' => $tt, 'cur_namespace' => $n ),
1591                         $fname, 'FOR UPDATE'
1592                 );
1593                 if( $s === false ) {
1594                         # Something wrong
1595                         $wgOut->addHTML( wfMsg( 'notanarticle' ) );
1596                         return;
1597                 }
1598                 $ut = $dbw->strencode( $s->cur_user_text );
1599                 $uid = $s->cur_user;
1600                 $pid = $s->cur_id;
1601
1602                 $from = str_replace( '_', ' ', $wgRequest->getVal( 'from' ) );
1603                 if( $from != $s->cur_user_text ) {
1604                         $wgOut->setPageTitle(wfmsg('rollbackfailed'));
1605                         $wgOut->addWikiText( wfMsg( 'alreadyrolled',
1606                                 htmlspecialchars( $this->mTitle->getPrefixedText()),
1607                                 htmlspecialchars( $from ),
1608                                 htmlspecialchars( $s->cur_user_text ) ) );
1609                         if($s->cur_comment != '') {
1610                                 $wgOut->addHTML(
1611                                         wfMsg('editcomment',
1612                                         htmlspecialchars( $s->cur_comment ) ) );
1613                         }
1614                         return;
1615                 }
1616
1617                 # Get the last edit not by this guy
1618                 $s = $dbw->getArray( 'old',
1619                         array( 'old_text','old_user','old_user_text','old_timestamp','old_flags' ),
1620                         array(
1621                                 'old_namespace' => $n,
1622                                 'old_title' => $tt,
1623                                 "old_user <> {$uid} OR old_user_text <> '{$ut}'"
1624                         ), $fname, array( 'FOR UPDATE', 'USE INDEX' => 'name_title_timestamp' )
1625                 );
1626                 if( $s === false ) {
1627                         # Something wrong
1628                         $wgOut->setPageTitle(wfMsg('rollbackfailed'));
1629                         $wgOut->addHTML( wfMsg( 'cantrollback' ) );
1630                         return;
1631                 }
1632
1633                 if ( $bot ) {
1634                         # Mark all reverted edits as bot
1635                         $dbw->updateArray( 'recentchanges',
1636                                 array( /* SET */
1637                                         'rc_bot' => 1
1638                                 ), array( /* WHERE */
1639                                         'rc_user' => $uid,
1640                                         "rc_timestamp > '{$s->old_timestamp}'",
1641                                 ), $fname
1642                         );
1643                 }
1644
1645                 # Save it!
1646                 $newcomment = wfMsg( 'revertpage', $s->old_user_text, $from );
1647                 $wgOut->setPagetitle( wfMsg( 'actioncomplete' ) );
1648                 $wgOut->setRobotpolicy( 'noindex,nofollow' );
1649                 $wgOut->addHTML( '<h2>' . $newcomment . "</h2>\n<hr />\n" );
1650                 $this->updateArticle( Article::getRevisionText( $s ), $newcomment, 1, $this->mTitle->userIsWatching(), $bot );
1651                 Article::onArticleEdit( $this->mTitle );
1652                 $wgOut->returnToMain( false );
1653         }
1654
1655
1656         # Do standard deferred updates after page view
1657
1658         /* private */ function viewUpdates() {
1659                 global $wgDeferredUpdateList;
1660                 if ( 0 != $this->getID() ) {
1661                         global $wgDisableCounters;
1662                         if( !$wgDisableCounters ) {
1663                                 Article::incViewCount( $this->getID() );
1664                                 $u = new SiteStatsUpdate( 1, 0, 0 );
1665                                 array_push( $wgDeferredUpdateList, $u );
1666                         }
1667                 }
1668                 $u = new UserTalkUpdate( 0, $this->mTitle->getNamespace(),
1669                   $this->mTitle->getDBkey() );
1670                 array_push( $wgDeferredUpdateList, $u );
1671         }
1672
1673         # Do standard deferred updates after page edit.
1674         # Every 1000th edit, prune the recent changes table.
1675
1676         /* private */ function editUpdates( $text ) {
1677                 global $wgDeferredUpdateList, $wgDBname, $wgMemc;
1678                 global $wgMessageCache;
1679
1680                 wfSeedRandom();
1681                 if ( 0 == mt_rand( 0, 999 ) ) {
1682                         $dbw =& wfGetDB( DB_MASTER );
1683                         $cutoff = wfUnix2Timestamp( time() - ( 7 * 86400 ) );
1684                         $sql = "DELETE FROM recentchanges WHERE rc_timestamp < '{$cutoff}'";
1685                         $dbw->query( $sql );
1686                 }
1687                 $id = $this->getID();
1688                 $title = $this->mTitle->getPrefixedDBkey();
1689                 $shortTitle = $this->mTitle->getDBkey();
1690
1691                 $adj = $this->mCountAdjustment;
1692
1693                 if ( 0 != $id ) {
1694                         $u = new LinksUpdate( $id, $title );
1695                         array_push( $wgDeferredUpdateList, $u );
1696                         $u = new SiteStatsUpdate( 0, 1, $adj );
1697                         array_push( $wgDeferredUpdateList, $u );
1698                         $u = new SearchUpdate( $id, $title, $text );
1699                         array_push( $wgDeferredUpdateList, $u );
1700
1701                         $u = new UserTalkUpdate( 1, $this->mTitle->getNamespace(), $shortTitle );
1702                         array_push( $wgDeferredUpdateList, $u );
1703
1704                         if ( $this->mTitle->getNamespace() == NS_MEDIAWIKI ) {
1705                                 $wgMessageCache->replace( $shortTitle, $text );
1706                         }
1707                 }
1708         }
1709
1710         /* private */ function setOldSubtitle() {
1711                 global $wgLang, $wgOut;
1712
1713                 $td = $wgLang->timeanddate( $this->mTimestamp, true );
1714                 $r = wfMsg( 'revisionasof', $td );
1715                 $wgOut->setSubtitle( "({$r})" );
1716         }
1717
1718         # This function is called right before saving the wikitext,
1719         # so we can do things like signatures and links-in-context.
1720
1721         function preSaveTransform( $text ) {
1722                 global $wgParser, $wgUser;
1723                 return $wgParser->preSaveTransform( $text, $this->mTitle, $wgUser, ParserOptions::newFromUser( $wgUser ) );
1724         }
1725
1726         /* Caching functions */
1727
1728         # checkLastModified returns true if it has taken care of all
1729         # output to the client that is necessary for this request.
1730         # (that is, it has sent a cached version of the page)
1731         function tryFileCache() {
1732                 static $called = false;
1733                 if( $called ) {
1734                         wfDebug( " tryFileCache() -- called twice!?\n" );
1735                         return;
1736                 }
1737                 $called = true;
1738                 if($this->isFileCacheable()) {
1739                         $touched = $this->mTouched;
1740                         if( $this->mTitle->getPrefixedDBkey() == wfMsg( 'mainpage' ) ) {
1741                                 # Expire the main page quicker
1742                                 $expire = wfUnix2Timestamp( time() - 3600 );
1743                                 $touched = max( $expire, $touched );
1744                         }
1745                         $cache = new CacheManager( $this->mTitle );
1746                         if($cache->isFileCacheGood( $touched )) {
1747                                 global $wgOut;
1748                                 wfDebug( " tryFileCache() - about to load\n" );
1749                                 $cache->loadFromFileCache();
1750                                 return true;
1751                         } else {
1752                                 wfDebug( " tryFileCache() - starting buffer\n" );
1753                                 ob_start( array(&$cache, 'saveToFileCache' ) );
1754                         }
1755                 } else {
1756                         wfDebug( " tryFileCache() - not cacheable\n" );
1757                 }
1758         }
1759
1760         function isFileCacheable() {
1761                 global $wgUser, $wgUseFileCache, $wgShowIPinHeader, $wgRequest;
1762                 extract( $wgRequest->getValues( 'action', 'oldid', 'diff', 'redirect', 'printable' ) );
1763
1764                 return $wgUseFileCache
1765                         and (!$wgShowIPinHeader)
1766                         and ($this->getID() != 0)
1767                         and ($wgUser->getId() == 0)
1768                         and (!$wgUser->getNewtalk())
1769                         and ($this->mTitle->getNamespace() != NS_SPECIAL )
1770                         and (empty( $action ) || $action == 'view')
1771                         and (!isset($oldid))
1772                         and (!isset($diff))
1773                         and (!isset($redirect))
1774                         and (!isset($printable))
1775                         and (!$this->mRedirectedFrom);
1776         }
1777
1778         # Loads cur_touched and returns a value indicating if it should be used
1779         function checkTouched() {
1780                 $fname = 'Article::checkTouched';
1781
1782                 $id = $this->getID();
1783                 $dbr =& wfGetDB( DB_SLAVE );
1784                 $s = $dbr->getArray( 'cur', array( 'cur_touched', 'cur_is_redirect' ),
1785                         array( 'cur_id' => $id ), $fname );
1786                 if( $s !== false ) {
1787                         $this->mTouched = $s->cur_touched;
1788                         return !$s->cur_is_redirect;
1789                 } else {
1790                         return false;
1791                 }
1792         }
1793
1794         # Edit an article without doing all that other stuff
1795         function quickEdit( $text, $comment = '', $minor = 0 ) {
1796                 global $wgUser, $wgMwRedir;
1797                 $fname = 'Article::quickEdit';
1798                 wfProfileIn( $fname );
1799
1800                 $dbw =& wfGetDB( DB_MASTER );
1801                 $ns = $this->mTitle->getNamespace();
1802                 $dbkey = $this->mTitle->getDBkey();
1803                 $encDbKey = $dbw->strencode( $dbkey );
1804                 $timestamp = wfTimestampNow();
1805
1806                 # Save to history
1807                 $dbw->insertSelect( 'old', 'cur',
1808                         array(
1809                                 'old_namespace' => 'cur_namespace',
1810                                 'old_title' => 'cur_title',
1811                                 'old_text' => 'cur_text',
1812                                 'old_comment' => 'cur_comment',
1813                                 'old_user' => 'cur_user',
1814                                 'old_user_text' => 'cur_user_text',
1815                                 'old_timestamp' => 'cur_timestamp',
1816                                 'inverse_timestamp' => '99999999999999-cur_timestamp',
1817                         ), array(
1818                                 'cur_namespace' => $ns,
1819                                 'cur_title' => $dbkey,
1820                         ), $fname
1821                 );
1822
1823                 # Use the affected row count to determine if the article is new
1824                 $numRows = $dbw->affectedRows();
1825
1826                 # Make an array of fields to be inserted
1827                 $fields = array(
1828                         'cur_text' => $text,
1829                         'cur_timestamp' => $timestamp,
1830                         'cur_user' => $wgUser->getID(),
1831                         'cur_user_text' => $wgUser->getName(),
1832                         'inverse_timestamp' => wfInvertTimestamp( $timestamp ),
1833                         'cur_comment' => $comment,
1834                         'cur_is_redirect' => $wgMwRedir->matchStart( $text ) ? 1 : 0,
1835                         'cur_minor_edit' => intval($minor),
1836                         'cur_touched' => $timestamp,
1837                 );
1838
1839                 if ( $numRows ) {
1840                         # Update article
1841                         $fields['cur_is_new'] = 0;
1842                         $dbw->updateArray( 'cur', $fields, array( 'cur_namespace' => $ns, 'cur_title' => $dbkey ), $fname );
1843                 } else {
1844                         # Insert new article
1845                         $fields['cur_is_new'] = 1;
1846                         $fields['cur_namespace'] = $ns;
1847                         $fields['cur_title'] = $dbkey;
1848                         $fields['cur_random'] = $rand = number_format( mt_rand() / mt_getrandmax(), 12, '.', '' );
1849                         $dbw->insertArray( 'cur', $fields, $fname );
1850                 }
1851                 wfProfileOut( $fname );
1852         }
1853
1854         /* static */ function incViewCount( $id ) {
1855                 $id = intval( $id );
1856                 global $wgHitcounterUpdateFreq;
1857
1858                 $dbw =& wfGetDB( DB_MASTER );
1859                 $curTable = $dbw->tableName( 'cur' );
1860                 $hitcounterTable = $dbw->tableName( 'hitcounter' );
1861                 $acchitsTable = $dbw->tableName( 'acchits' );
1862
1863                 if( $wgHitcounterUpdateFreq <= 1 ){ //
1864                         $dbw->query( "UPDATE $curTable SET cur_counter = cur_counter + 1 WHERE cur_id = $id" );
1865                         return;
1866                 }
1867
1868                 # Not important enough to warrant an error page in case of failure
1869                 $oldignore = $dbw->ignoreErrors( true );
1870
1871                 $dbw->query( "INSERT INTO $hitcounterTable (hc_id) VALUES ({$id})" );
1872
1873                 $checkfreq = intval( $wgHitcounterUpdateFreq/25 + 1 );
1874                 if( (rand() % $checkfreq != 0) or ($dbw->lastErrno() != 0) ){
1875                         # Most of the time (or on SQL errors), skip row count check
1876                         $dbw->ignoreErrors( $oldignore );
1877                         return;
1878                 }
1879
1880                 $res = $dbw->query("SELECT COUNT(*) as n FROM $hitcounterTable");
1881                 $row = $dbw->fetchObject( $res );
1882                 $rown = intval( $row->n );
1883                 if( $rown >= $wgHitcounterUpdateFreq ){
1884                         wfProfileIn( 'Article::incViewCount-collect' );
1885                         $old_user_abort = ignore_user_abort( true );
1886
1887                         $dbw->query("LOCK TABLES $hitcounterTable WRITE");
1888                         $dbw->query("CREATE TEMPORARY TABLE $acchitsTable TYPE=HEAP ".
1889                                 "SELECT hc_id,COUNT(*) AS hc_n FROM $hitcounterTable ".
1890                                 'GROUP BY hc_id');
1891                         $dbw->query("DELETE FROM $hitcounterTable");
1892                         $dbw->query('UNLOCK TABLES');
1893                         $dbw->query("UPDATE $curTable,$acchitsTable SET cur_counter=cur_counter + hc_n ".
1894                                 'WHERE cur_id = hc_id');
1895                         $dbw->query("DROP TABLE $acchitsTable");
1896
1897                         ignore_user_abort( $old_user_abort );
1898                         wfProfileOut( 'Article::incViewCount-collect' );
1899                 }
1900                 $dbw->ignoreErrors( $oldignore );
1901         }
1902
1903         # The onArticle*() functions are supposed to be a kind of hooks
1904         # which should be called whenever any of the specified actions
1905         # are done.
1906         #
1907         # This is a good place to put code to clear caches, for instance.
1908
1909         # This is called on page move and undelete, as well as edit
1910         /* static */ function onArticleCreate($title_obj) {
1911                 global $wgUseSquid, $wgDeferredUpdateList;
1912
1913                 $titles = $title_obj->getBrokenLinksTo();
1914
1915                 # Purge squid
1916                 if ( $wgUseSquid ) {
1917                         $urls = $title_obj->getSquidURLs();
1918                         foreach ( $titles as $linkTitle ) {
1919                                 $urls[] = $linkTitle->getInternalURL();
1920                         }
1921                         $u = new SquidUpdate( $urls );
1922                         array_push( $wgDeferredUpdateList, $u );
1923                 }
1924
1925                 # Clear persistent link cache
1926                 LinkCache::linksccClearBrokenLinksTo( $title_obj->getPrefixedDBkey() );
1927         }
1928
1929         /* static */ function onArticleDelete($title_obj) {
1930                 LinkCache::linksccClearLinksTo( $title_obj->getArticleID() );
1931         }
1932
1933         /* static */ function onArticleEdit($title_obj) {
1934                 LinkCache::linksccClearPage( $title_obj->getArticleID() );
1935         }
1936
1937
1938         # Info about this page
1939
1940         function info() {
1941                 global $wgUser, $wgTitle, $wgOut, $wgLang, $wgAllowPageInfo;
1942                 $fname = 'Article::info';
1943
1944                 if ( !$wgAllowPageInfo ) {
1945                         $wgOut->errorpage( "nosuchaction", "nosuchactiontext" );
1946                         return;
1947                 }
1948
1949                 $dbr =& wfGetDB( DB_SLAVE );
1950
1951                 $basenamespace = $wgTitle->getNamespace() & (~1);
1952                 $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace );
1953                 $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace );
1954                 $wl_clause  = array( 'wl_title' => $wgTitle->getDBkey(), 'wl_namespace' => $basenamespace );
1955                 $fullTitle = $wgTitle->makeName($basenamespace, $wgTitle->getDBKey());
1956                 $wgOut->setPagetitle(  $fullTitle );
1957                 $wgOut->setSubtitle( wfMsg( "infosubtitle" ));
1958
1959                 # first, see if the page exists at all.
1960                 $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname );
1961                 if ($exists < 1) {
1962                         $wgOut->addHTML( wfMsg("noarticletext") );
1963                 } else {
1964                         $numwatchers = $dbr->selectField( 'watchlist', 'COUNT(*)', $wl_clause, $fname );
1965                         $wgOut->addHTML( "<ul><li>" . wfMsg("numwatchers", $numwatchers) . "</li>" );
1966                         $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname );
1967                         $wgOut->addHTML( "<li>" . wfMsg("numedits", $old + 1) . "</li>");
1968
1969                         # to find number of distinct authors, we need to do some
1970                         # funny stuff because of the cur/old table split:
1971                         # - first, find the name of the 'cur' author
1972                         # - then, find the number of *other* authors in 'old'
1973
1974                         # find 'cur' author
1975                         $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname );
1976
1977                         # find number of 'old' authors excluding 'cur' author
1978                         $authors = $dbr->selectField( 'old', 'COUNT(DISTINCT old_user_text)',
1979                                 $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ), $fname ) + 1;
1980
1981                         # now for the Talk page ...
1982                         $cur_clause = array( 'cur_title' => $wgTitle->getDBkey(), 'cur_namespace' => $basenamespace+1 );
1983                         $old_clause = array( 'old_title' => $wgTitle->getDBkey(), 'old_namespace' => $basenamespace+1 );
1984
1985                         # does it exist?
1986                         $exists = $dbr->selectField( 'cur', 'COUNT(*)', $cur_clause, $fname );
1987
1988                         # number of edits
1989                         if ($exists > 0) {
1990                                 $old = $dbr->selectField( 'old', 'COUNT(*)', $old_clause, $fname );
1991                                 $wgOut->addHTML( "<li>" . wfMsg("numtalkedits", $old + 1) . "</li>");
1992                         }
1993                         $wgOut->addHTML( "<li>" . wfMsg("numauthors", $authors) . "</li>" );
1994
1995                         # number of authors
1996                         if ($exists > 0) {
1997                                 $cur_author = $dbr->selectField( 'cur', 'cur_user_text', $cur_clause, $fname );
1998                                 $authors = $dbr->selectField( 'cur', 'COUNT(DISTINCT old_user_text)',
1999                                         $old_clause + array( 'old_user_text<>' . $dbr->addQuotes( $cur_author ) ), $fname );
2000
2001                                 $wgOut->addHTML( "<li>" . wfMsg("numtalkauthors", $authors) . "</li></ul>" );
2002                         }
2003                 }
2004         }
2005 }
2006
2007 ?>