includes/Title.php

   1 <?php
   2 # See title.doc
   3
   4 $wgTitleInterwikiCache = array();
   5
   6 # Title class
   7 #
   8 # * Represents a title, which may contain an interwiki designation or namespace
   9 # * Can fetch various kinds of data from the database, albeit inefficiently.
  10 #
  11 class Title {
  12         # All member variables should be considered private
  13         # Please use the accessor functions
  14
  15         var $mTextform;           # Text form (spaces not underscores) of the main part
  16         var $mUrlform;            # URL-encoded form of the main part
  17         var $mDbkeyform;          # Main part with underscores
  18         var $mNamespace;          # Namespace index, i.e. one of the NS_xxxx constants
  19         var $mInterwiki;          # Interwiki prefix (or null string)
  20         var $mFragment;           # Title fragment (i.e. the bit after the #)
  21         var $mArticleID;          # Article ID, fetched from the link cache on demand
  22         var $mRestrictions;       # Array of groups allowed to edit this article
  23                               # Only null or "sysop" are supported
  24         var $mRestrictionsLoaded; # Boolean for initialisation on demand
  25         var $mPrefixedText;       # Text form including namespace/interwiki, initialised on demand
  26         var $mDefaultNamespace;   # Namespace index when there is no namespace
  27                               # Zero except in {{transclusion}} tags
  28
  29 #----------------------------------------------------------------------------
  30 #   Construction
  31 #----------------------------------------------------------------------------
  32
  33         /* private */ function Title() {
  34                 $this->mInterwiki = $this->mUrlform =
  35                 $this->mTextform = $this->mDbkeyform = '';
  36                 $this->mArticleID = -1;
  37                 $this->mNamespace = 0;
  38                 $this->mRestrictionsLoaded = false;
  39                 $this->mRestrictions = array();
  40         $this->mDefaultNamespace = 0;
  41         }
  42
  43         # From a prefixed DB key
  44         /* static */ function newFromDBkey( $key ) {
  45                 $t = new Title();
  46                 $t->mDbkeyform = $key;
  47                 if( $t->secureAndSplit() )
  48                         return $t;
  49                 else
  50                         return NULL;
  51         }
  52
  53         # From text, such as what you would find in a link
  54         /* static */ function newFromText( $text, $defaultNamespace = 0 ) {
  55                 $fname = 'Title::newFromText';
  56                 wfProfileIn( $fname );
  57
  58                 if( is_object( $text ) ) {
  59                         wfDebugDieBacktrace( 'Called with object instead of string.' );
  60                 }
  61                 global $wgInputEncoding;
  62                 $text = do_html_entity_decode( $text, ENT_COMPAT, $wgInputEncoding );
  63
  64                 $text = wfMungeToUtf8( $text );
  65
  66
  67                 # What was this for? TS 2004-03-03
  68                 # $text = urldecode( $text );
  69
  70                 $t = new Title();
  71                 $t->mDbkeyform = str_replace( ' ', '_', $text );
  72                 $t->mDefaultNamespace = $defaultNamespace;
  73
  74                 wfProfileOut( $fname );
  75                 if ( !is_object( $t ) ) {
  76                         var_dump( debug_backtrace() );
  77                 }
  78                 if( $t->secureAndSplit() ) {
  79                         return $t;
  80                 } else {
  81                         return NULL;
  82                 }
  83         }
  84
  85         # From a URL-encoded title
  86         /* static */ function newFromURL( $url ) {
  87                 global $wgLang, $wgServer;
  88                 $t = new Title();
  89
  90                 # For compatibility with old buggy URLs. "+" is not valid in titles,
  91                 # but some URLs used it as a space replacement and they still come
  92                 # from some external search tools.
  93                 $s = str_replace( '+', ' ', $url );
  94
  95                 # For links that came from outside, check for alternate/legacy
  96                 # character encoding.
  97                 wfDebug( "Servr: $wgServer\n" );
  98                 if( empty( $_SERVER['HTTP_REFERER'] ) ||
  99                         strncmp($wgServer, $_SERVER['HTTP_REFERER'], strlen( $wgServer ) ) )
 100                 {
 101                         $s = $wgLang->checkTitleEncoding( $s );
 102                 } else {
 103                         wfDebug( "Refer: {$_SERVER['HTTP_REFERER']}\n" );
 104                 }
 105
 106                 $t->mDbkeyform = str_replace( ' ', '_', $s );
 107                 if( $t->secureAndSplit() ) {
 108                         # check that length of title is < cur_title size
 109                         $dbr =& wfGetDB( DB_SLAVE );
 110                         $maxSize = $dbr->textFieldSize( 'cur', 'cur_title' );
 111                         if ( $maxSize != -1 && strlen( $t->mDbkeyform ) > $maxSize ) {
 112                                 return NULL;
 113                         }
 114
 115                         return $t;
 116                 } else {
 117                         return NULL;
 118                 }
 119         }
 120
 121         # From a cur_id
 122         # This is inefficiently implemented, the cur row is requested but not
 123         # used for anything else
 124         /* static */ function newFromID( $id ) {
 125                 $fname = 'Title::newFromID';
 126                 $dbr =& wfGetDB( DB_SLAVE );
 127                 $row = $dbr->getArray( 'cur', array( 'cur_namespace', 'cur_title' ),
 128                         array( 'cur_id' => $id ), $fname );
 129                 if ( $row !== false ) {
 130                         $title = Title::makeTitle( $row->cur_namespace, $row->cur_title );
 131                 } else {
 132                         $title = NULL;
 133                 }
 134                 return $title;
 135         }
 136
 137         # From a namespace index and a DB key
 138         /* static */ function makeTitle( $ns, $title ) {
 139                 $t = new Title();
 140                 $t->mDbkeyform = Title::makeName( $ns, $title );
 141                 if( $t->secureAndSplit() ) {
 142                         return $t;
 143                 } else {
 144                         return NULL;
 145                 }
 146         }
 147
 148         /* static */ function newMainPage() {
 149                 return Title::newFromText( wfMsg( 'mainpage' ) );
 150         }
 151
 152         # Get the title object for a redirect
 153         # Returns NULL if the text is not a valid redirect
 154         /* static */ function newFromRedirect( $text ) {
 155                 global $wgMwRedir;
 156                 $rt = NULL;
 157                 if ( $wgMwRedir->matchStart( $text ) ) {
 158                         if ( preg_match( '/\\[\\[([^\\]\\|]+)[\\]\\|]/', $text, $m ) ) {
 159                                 $rt = Title::newFromText( $m[1] );
 160                         }
 161                 }
 162                 return $rt;
 163         }
 164
 165 #----------------------------------------------------------------------------
 166 #       Static functions
 167 #----------------------------------------------------------------------------
 168
 169         # Get the prefixed DB key associated with an ID
 170         /* static */ function nameOf( $id ) {
 171                 $fname = 'Title::nameOf';
 172                 $dbr =& wfGetDB( DB_SLAVE );
 173
 174                 $s = $dbr->getArray( 'cur', array( 'cur_namespace','cur_title' ),  array( 'cur_id' => $id ), $fname );
 175                 if ( $s === false ) { return NULL; }
 176
 177                 $n = Title::makeName( $s->cur_namespace, $s->cur_title );
 178                 return $n;
 179         }
 180
 181         # Get a regex character class describing the legal characters in a link
 182         /* static */ function legalChars() {
 183                 # Missing characters:
 184                 #  * []|# Needed for link syntax
 185                 #  * % and + are corrupted by Apache when they appear in the path
 186                 #
 187                 # % seems to work though
 188                 #
 189                 # The problem with % is that URLs are double-unescaped: once by Apache's
 190                 # path conversion code, and again by PHP. So %253F, for example, becomes "?".
 191                 # Our code does not double-escape to compensate for this, indeed double escaping
 192                 # would break if the double-escaped title was passed in the query string
 193                 # rather than the path. This is a minor security issue because articles can be
 194                 # created such that they are hard to view or edit. -- TS
 195                 #
 196                 # Theoretically 0x80-0x9F of ISO 8859-1 should be disallowed, but
 197                 # this breaks interlanguage links
 198
 199                 $set = " %!\"$&'()*,\\-.\\/0-9:;=?@A-Z\\\\^_`a-z{}~\\x80-\\xFF";
 200                 return $set;
 201         }
 202
 203         # Returns a stripped-down a title string ready for the search index
 204         # Takes a namespace index and a text-form main part
 205         /* static */ function indexTitle( $ns, $title ) {
 206                 global $wgDBminWordLen, $wgLang;
 207
 208                 $lc = SearchEngine::legalSearchChars() . '&#;';
 209                 $t = $wgLang->stripForSearch( $title );
 210                 $t = preg_replace( "/[^{$lc}]+/", ' ', $t );
 211                 $t = strtolower( $t );
 212
 213                 # Handle 's, s'
 214                 $t = preg_replace( "/([{$lc}]+)'s( |$)/", "\\1 \\1's ", $t );
 215                 $t = preg_replace( "/([{$lc}]+)s'( |$)/", "\\1s ", $t );
 216
 217                 $t = preg_replace( "/\\s+/", ' ', $t );
 218
 219                 if ( $ns == Namespace::getImage() ) {
 220                         $t = preg_replace( "/ (png|gif|jpg|jpeg|ogg)$/", "", $t );
 221                 }
 222                 return trim( $t );
 223         }
 224
 225         # Make a prefixed DB key from a DB key and a namespace index
 226         /* static */ function makeName( $ns, $title ) {
 227                 global $wgLang;
 228
 229                 $n = $wgLang->getNsText( $ns );
 230                 if ( "" == $n ) { return $title; }
 231                 else { return "{$n}:{$title}"; }
 232         }
 233
 234         # Arguably static
 235         # Returns the URL associated with an interwiki prefix
 236         # The URL contains $1, which is replaced by the title
 237         function getInterwikiLink( $key ) {
 238                 global $wgMemc, $wgDBname, $wgInterwikiExpiry, $wgTitleInterwikiCache;
 239                 $fname = 'Title::getInterwikiLink';
 240                 $k = $wgDBname.':interwiki:'.$key;
 241
 242                 if( array_key_exists( $k, $wgTitleInterwikiCache ) )
 243                         return $wgTitleInterwikiCache[$k]->iw_url;
 244
 245                 $s = $wgMemc->get( $k );
 246                 # Ignore old keys with no iw_local
 247                 if( $s && isset( $s->iw_local ) ) {
 248                         $wgTitleInterwikiCache[$k] = $s;
 249                         return $s->iw_url;
 250                 }
 251                 $dbr =& wfGetDB( DB_SLAVE );
 252                 $res = $dbr->select( 'interwiki', array( 'iw_url', 'iw_local' ), array( 'iw_prefix' => $key ), $fname );
 253                 if(!$res) return "";
 254
 255                 $s = $dbr->fetchObject( $res );
 256                 if(!$s) {
 257                         # Cache non-existence: create a blank object and save it to memcached
 258                         $s = (object)false;
 259                         $s->iw_url = "";
 260                         $s->iw_local = 0;
 261                 }
 262                 $wgMemc->set( $k, $s, $wgInterwikiExpiry );
 263                 $wgTitleInterwikiCache[$k] = $s;
 264                 return $s->iw_url;
 265         }
 266
 267         function isLocal() {
 268                 global $wgTitleInterwikiCache, $wgDBname;
 269
 270                 if ( $this->mInterwiki != '' ) {
 271                         # Make sure key is loaded into cache
 272                         $this->getInterwikiLink( $this->mInterwiki );
 273                         $k = $wgDBname.':interwiki:' . $this->mInterwiki;
 274                         return (bool)($wgTitleInterwikiCache[$k]->iw_local);
 275                 } else {
 276                         return true;
 277                 }
 278         }
 279
 280         # Update the cur_touched field for an array of title objects
 281         # Inefficient unless the IDs are already loaded into the link cache
 282         /* static */ function touchArray( $titles, $timestamp = '' ) {
 283                 if ( count( $titles ) == 0 ) {
 284                         return;
 285                 }
 286                 if ( $timestamp == '' ) {
 287                         $timestamp = wfTimestampNow();
 288                 }
 289                 $dbw =& wfGetDB( DB_MASTER );
 290                 $cur = $dbw->tableName( 'cur' );
 291                 $sql = "UPDATE $cur SET cur_touched='{$timestamp}' WHERE cur_id IN (";
 292                 $first = true;
 293
 294                 foreach ( $titles as $title ) {
 295                         if ( ! $first ) {
 296                                 $sql .= ',';
 297                         }
 298                         $first = false;
 299                         $sql .= $title->getArticleID();
 300                 }
 301                 $sql .= ')';
 302                 if ( ! $first ) {
 303                         $dbw->query( $sql, 'Title::touchArray' );
 304                 }
 305         }
 306
 307 #----------------------------------------------------------------------------
 308 #       Other stuff
 309 #----------------------------------------------------------------------------
 310
 311         # Simple accessors
 312         # See the definitions at the top of this file
 313
 314         function getText() { return $this->mTextform; }
 315         function getPartialURL() { return $this->mUrlform; }
 316         function getDBkey() { return $this->mDbkeyform; }
 317         function getNamespace() { return $this->mNamespace; }
 318         function setNamespace( $n ) { $this->mNamespace = $n; }
 319         function getInterwiki() { return $this->mInterwiki; }
 320         function getFragment() { return $this->mFragment; }
 321         function getDefaultNamespace() { return $this->mDefaultNamespace; }
 322
 323         # Get title for search index
 324         function getIndexTitle() {
 325                 return Title::indexTitle( $this->mNamespace, $this->mTextform );
 326         }
 327
 328         # Get prefixed title with underscores
 329         function getPrefixedDBkey() {
 330                 $s = $this->prefix( $this->mDbkeyform );
 331                 $s = str_replace( ' ', '_', $s );
 332                 return $s;
 333         }
 334
 335         # Get prefixed title with spaces
 336         # This is the form usually used for display
 337         function getPrefixedText() {
 338                 if ( empty( $this->mPrefixedText ) ) {
 339                         $s = $this->prefix( $this->mTextform );
 340                         $s = str_replace( '_', ' ', $s );
 341                         $this->mPrefixedText = $s;
 342                 }
 343                 return $this->mPrefixedText;
 344         }
 345
 346         # As getPrefixedText(), plus fragment.
 347         function getFullText() {
 348                 $text = $this->getPrefixedText();
 349                 if( '' != $this->mFragment ) {
 350                         $text .= '#' . $this->mFragment;
 351                 }
 352                 return $text;
 353         }
 354
 355         # Get a URL-encoded title (not an actual URL) including interwiki
 356         function getPrefixedURL() {
 357                 $s = $this->prefix( $this->mDbkeyform );
 358                 $s = str_replace( ' ', '_', $s );
 359
 360                 $s = wfUrlencode ( $s ) ;
 361
 362                 # Cleaning up URL to make it look nice -- is this safe?
 363                 $s = preg_replace( '/%3[Aa]/', ':', $s );
 364                 $s = preg_replace( '/%2[Ff]/', '/', $s );
 365                 $s = str_replace( '%28', '(', $s );
 366                 $s = str_replace( '%29', ')', $s );
 367
 368                 return $s;
 369         }
 370
 371         # Get a real URL referring to this title, with interwiki link and fragment
 372         function getFullURL( $query = '' ) {
 373                 global $wgLang, $wgArticlePath, $wgServer, $wgScript;
 374
 375                 if ( '' == $this->mInterwiki ) {
 376                         $p = $wgArticlePath;
 377                         return $wgServer . $this->getLocalUrl( $query );
 378                 } else {
 379                         $baseUrl = $this->getInterwikiLink( $this->mInterwiki );
 380                         $namespace = $wgLang->getNsText( $this->mNamespace );
 381                         if ( '' != $namespace ) {
 382                                 # Can this actually happen? Interwikis shouldn't be parsed.
 383                                 $namepace .= ':';
 384                         }
 385                         $url = str_replace( '$1', $namespace . $this->mUrlform, $baseUrl );
 386                         if ( '' != $this->mFragment ) {
 387                                 $url .= '#' . $this->mFragment;
 388                         }
 389                         return $url;
 390                 }
 391         }
 392
 393         # Get a URL with an optional query string, no fragment
 394         # * If $query=="", it will use $wgArticlePath
 395         # * Returns a full for an interwiki link, loses any query string
 396         # * Optionally adds the server and escapes for HTML
 397         # * Setting $query to "-" makes an old-style URL with nothing in the
 398         #   query except a title
 399
 400         function getURL() {
 401                 die( 'Call to obsolete obsolete function Title::getURL()' );
 402         }
 403
 404         function getLocalURL( $query = '' ) {
 405                 global $wgLang, $wgArticlePath, $wgScript;
 406
 407                 if ( $this->isExternal() ) {
 408                         return $this->getFullURL();
 409                 }
 410
 411                 $dbkey = wfUrlencode( $this->getPrefixedDBkey() );
 412                 if ( $query == '' ) {
 413                         $url = str_replace( '$1', $dbkey, $wgArticlePath );
 414                 } else {
 415                         if ( $query == '-' ) {
 416                                 $query = '';
 417                         }
 418                         if ( $wgScript != '' ) {
 419                                 $url = "{$wgScript}?title={$dbkey}&{$query}";
 420                         } else {
 421                                 # Top level wiki
 422                                 $url = "/{$dbkey}?{$query}";
 423                         }
 424                 }
 425                 return $url;
 426         }
 427
 428         function escapeLocalURL( $query = '' ) {
 429                 return htmlspecialchars( $this->getLocalURL( $query ) );
 430         }
 431
 432         function escapeFullURL( $query = '' ) {
 433                 return htmlspecialchars( $this->getFullURL( $query ) );
 434         }
 435
 436         function getInternalURL( $query = '' ) {
 437                 # Used in various Squid-related code, in case we have a different
 438                 # internal hostname for the server than the exposed one.
 439                 global $wgInternalServer;
 440                 return $wgInternalServer . $this->getLocalURL( $query );
 441         }
 442
 443         # Get the edit URL, or a null string if it is an interwiki link
 444         function getEditURL() {
 445                 global $wgServer, $wgScript;
 446
 447                 if ( '' != $this->mInterwiki ) { return ''; }
 448                 $s = $this->getLocalURL( 'action=edit' );
 449
 450                 return $s;
 451         }
 452
 453         # Get HTML-escaped displayable text
 454         # For the title field in <a> tags
 455         function getEscapedText() {
 456                 return htmlspecialchars( $this->getPrefixedText() );
 457         }
 458
 459         # Is the title interwiki?
 460         function isExternal() { return ( '' != $this->mInterwiki ); }
 461
 462         # Does the title correspond to a protected article?
 463         function isProtected() {
 464                 if ( -1 == $this->mNamespace ) { return true; }
 465                 $a = $this->getRestrictions();
 466                 if ( in_array( 'sysop', $a ) ) { return true; }
 467                 return false;
 468         }
 469
 470         # Is the page a log page, i.e. one where the history is messed up by
 471         # LogPage.php? This used to be used for suppressing diff links in recent
 472         # changes, but now that's done by setting a flag in the recentchanges
 473         # table. Hence, this probably is no longer used.
 474         function isLog() {
 475                 if ( $this->mNamespace != Namespace::getWikipedia() ) {
 476                         return false;
 477                 }
 478                 if ( ( 0 == strcmp( wfMsg( 'uploadlogpage' ), $this->mDbkeyform ) ) ||
 479                   ( 0 == strcmp( wfMsg( 'dellogpage' ), $this->mDbkeyform ) ) ) {
 480                         return true;
 481                 }
 482                 return false;
 483         }
 484
 485         # Is $wgUser is watching this page?
 486         function userIsWatching() {
 487                 global $wgUser;
 488
 489                 if ( -1 == $this->mNamespace ) { return false; }
 490                 if ( 0 == $wgUser->getID() ) { return false; }
 491
 492                 return $wgUser->isWatched( $this );
 493         }
 494
 495         # Can $wgUser edit this page?
 496         function userCanEdit() {
 497                 global $wgUser;
 498                 if ( -1 == $this->mNamespace ) { return false; }
 499                 if ( NS_MEDIAWIKI == $this->mNamespace && !$wgUser->isSysop() ) { return false; }
 500                 # if ( 0 == $this->getArticleID() ) { return false; }
 501                 if ( $this->mDbkeyform == '_' ) { return false; }
 502                 # protect global styles and js
 503                 if ( NS_MEDIAWIKI == $this->mNamespace
 504                      && preg_match("/\\.(css|js)$/", $this->mTextform )
 505                      && !$wgUser->isSysop() )
 506                 { return false; }
 507                 //if ( $this->isCssJsSubpage() and !$this->userCanEditCssJsSubpage() ) { return false; }
 508                 # protect css/js subpages of user pages
 509                 # XXX: this might be better using restrictions
 510                 # XXX: Find a way to work around the php bug that prevents using $this->userCanEditCssJsSubpage() from working
 511                 if( Namespace::getUser() == $this->mNamespace
 512                         and preg_match("/\\.(css|js)$/", $this->mTextform )
 513                         and !$wgUser->isSysop()
 514                         and !preg_match('/^'.preg_quote($wgUser->getName(), '/').'/', $this->mTextform) )
 515                 { return false; }
 516                 $ur = $wgUser->getRights();
 517                 foreach ( $this->getRestrictions() as $r ) {
 518                         if ( '' != $r && ( ! in_array( $r, $ur ) ) ) {
 519                                 return false;
 520                         }
 521                 }
 522                 return true;
 523         }
 524
 525         function userCanRead() {
 526                 global $wgUser;
 527                 global $wgWhitelistRead;
 528
 529                 if( 0 != $wgUser->getID() ) return true;
 530                 if( !is_array( $wgWhitelistRead ) ) return true;
 531
 532                 $name = $this->getPrefixedText();
 533                 if( in_array( $name, $wgWhitelistRead ) ) return true;
 534
 535                 # Compatibility with old settings
 536                 if( $this->getNamespace() == NS_MAIN ) {
 537                         if( in_array( ":" . $name, $wgWhitelistRead ) ) return true;
 538                 }
 539                 return false;
 540         }
 541
 542         function isCssJsSubpage() {
 543                 return ( Namespace::getUser() == $this->mNamespace and preg_match("/\\.(css|js)$/", $this->mTextform ) );
 544         }
 545         function isCssSubpage() {
 546                 return ( Namespace::getUser() == $this->mNamespace and preg_match("/\\.css$/", $this->mTextform ) );
 547         }
 548         function isJsSubpage() {
 549                 return ( Namespace::getUser() == $this->mNamespace and preg_match("/\\.js$/", $this->mTextform ) );
 550         }
 551         function userCanEditCssJsSubpage() {
 552                 # protect css/js subpages of user pages
 553                 # XXX: this might be better using restrictions
 554                 global $wgUser;
 555                 return ( $wgUser->isSysop() or preg_match('/^'.preg_quote($wgUser->getName()).'/', $this->mTextform) );
 556         }
 557
 558         # Accessor/initialisation for mRestrictions
 559         function getRestrictions() {
 560                 $id = $this->getArticleID();
 561                 if ( 0 == $id ) { return array(); }
 562
 563                 if ( ! $this->mRestrictionsLoaded ) {
 564                         $dbr =& wfGetDB( DB_SLAVE );
 565                         $res = $dbr->getField( 'cur', 'cur_restrictions', 'cur_id='.$id );
 566                         $this->mRestrictions = explode( ',', trim( $res ) );
 567                         $this->mRestrictionsLoaded = true;
 568                 }
 569                 return $this->mRestrictions;
 570         }
 571
 572         # Is there a version of this page in the deletion archive?
 573         # Returns the number of archived revisions
 574         function isDeleted() {
 575                 $fname = 'Title::isDeleted';
 576                 $dbr =& wfGetDB( DB_SLAVE );
 577                 $n = $dbr->getField( 'archive', 'COUNT(*)', array( 'ar_namespace' => $this->getNamespace(),
 578                         'ar_title' => $this->getDBkey() ), $fname );
 579                 return (int)$n;
 580         }
 581
 582         # Get the article ID from the link cache
 583         # Used very heavily, e.g. in Parser::replaceInternalLinks()
 584         function getArticleID() {
 585                 global $wgLinkCache;
 586
 587                 if ( -1 != $this->mArticleID ) { return $this->mArticleID; }
 588                 $this->mArticleID = $wgLinkCache->addLinkObj( $this );
 589                 return $this->mArticleID;
 590         }
 591
 592         # This clears some fields in this object, and clears any associated keys in the
 593         # "bad links" section of $wgLinkCache. This is called from Article::insertNewArticle()
 594         # to allow loading of the new cur_id. It's also called from Article::doDeleteArticle()
 595         function resetArticleID( $newid ) {
 596                 global $wgLinkCache;
 597                 $wgLinkCache->clearBadLink( $this->getPrefixedDBkey() );
 598
 599                 if ( 0 == $newid ) { $this->mArticleID = -1; }
 600                 else { $this->mArticleID = $newid; }
 601                 $this->mRestrictionsLoaded = false;
 602                 $this->mRestrictions = array();
 603         }
 604
 605         # Updates cur_touched
 606         # Called from LinksUpdate.php
 607         function invalidateCache() {
 608                 $now = wfTimestampNow();
 609                 $dbw =& wfGetDB( DB_MASTER );
 610                 $success = $dbw->updateArray( 'cur',
 611                         array( /* SET */
 612                                 'cur_touched' => wfTimestampNow()
 613                         ), array( /* WHERE */
 614                                 'cur_namespace' => $this->getNamespace() ,
 615                                 'cur_title' => $this->getDBkey()
 616                         ), 'Title::invalidateCache'
 617                 );
 618                 return $success;
 619         }
 620
 621         # Prefixes some arbitrary text with the namespace or interwiki prefix of this object
 622         /* private */ function prefix( $name ) {
 623                 global $wgLang;
 624
 625                 $p = '';
 626                 if ( '' != $this->mInterwiki ) {
 627                         $p = $this->mInterwiki . ':';
 628                 }
 629                 if ( 0 != $this->mNamespace ) {
 630                         $p .= $wgLang->getNsText( $this->mNamespace ) . ':';
 631                 }
 632                 return $p . $name;
 633         }
 634
 635         # Secure and split - main initialisation function for this object
 636         #
 637         # Assumes that mDbkeyform has been set, and is urldecoded
 638     # and uses underscores, but not otherwise munged.  This function
 639     # removes illegal characters, splits off the interwiki and
 640     # namespace prefixes, sets the other forms, and canonicalizes
 641     # everything.
 642         #
 643         /* private */ function secureAndSplit()
 644         {
 645                 global $wgLang, $wgLocalInterwiki, $wgCapitalLinks;
 646                 $fname = 'Title::secureAndSplit';
 647                 wfProfileIn( $fname );
 648
 649                 static $imgpre = false;
 650                 static $rxTc = false;
 651
 652                 # Initialisation
 653                 if ( $imgpre === false ) {
 654                         $imgpre = ':' . $wgLang->getNsText( Namespace::getImage() ) . ":";
 655                         # % is needed as well
 656                         $rxTc = '/[^' . Title::legalChars() . ']/';
 657                 }
 658
 659                 $this->mInterwiki = $this->mFragment = '';
 660                 $this->mNamespace = $this->mDefaultNamespace; # Usually NS_MAIN
 661
 662                 # Clean up whitespace
 663                 #
 664                 $t = preg_replace( "/[\\s_]+/", '_', $this->mDbkeyform );
 665                 $t = preg_replace( '/^_*(.*?)_*$/', '$1', $t );
 666
 667                 if ( '' == $t ) {
 668                         wfProfileOut( $fname );
 669                         return false;
 670                 }
 671
 672                 $this->mDbkeyform = $t;
 673                 $done = false;
 674
 675                 # :Image: namespace
 676                 if ( 0 == strncasecmp( $imgpre, $t, strlen( $imgpre ) ) ) {
 677                         $t = substr( $t, 1 );
 678                 }
 679
 680                 # Initial colon indicating main namespace
 681                 if ( ':' == $t{0} ) {
 682                         $r = substr( $t, 1 );
 683                         $this->mNamespace = NS_MAIN;
 684                 } else {
 685                         # Namespace or interwiki prefix
 686                         if ( preg_match( "/^(.+?)_*:_*(.*)$/", $t, $m ) ) {
 687                                 #$p = strtolower( $m[1] );
 688                                 $p = $m[1];
 689                                 $lowerNs = strtolower( $p );
 690                                 if ( $ns = Namespace::getCanonicalIndex( $lowerNs ) ) {
 691                                         # Canonical namespace
 692                                         $t = $m[2];
 693                                         $this->mNamespace = $ns;
 694                                 } elseif ( $ns = $wgLang->getNsIndex( $lowerNs )) {
 695                                         # Ordinary namespace
 696                                         $t = $m[2];
 697                                         $this->mNamespace = $ns;
 698                                 } elseif ( $this->getInterwikiLink( $p ) ) {
 699                                         # Interwiki link
 700                                         $t = $m[2];
 701                                         $this->mInterwiki = $p;
 702
 703                                         if ( !preg_match( "/^([A-Za-z0-9_\\x80-\\xff]+):(.*)$/", $t, $m ) ) {
 704                                                 $done = true;
 705                                         } elseif($this->mInterwiki != $wgLocalInterwiki) {
 706                                                 $done = true;
 707                                         }
 708                                 }
 709                         }
 710                         $r = $t;
 711                 }
 712
 713                 # Redundant interwiki prefix to the local wiki
 714                 if ( 0 == strcmp( $this->mInterwiki, $wgLocalInterwiki ) ) {
 715                         $this->mInterwiki = '';
 716                 }
 717                 # We already know that some pages won't be in the database!
 718                 #
 719                 if ( '' != $this->mInterwiki || -1 == $this->mNamespace ) {
 720                         $this->mArticleID = 0;
 721                 }
 722                 $f = strstr( $r, '#' );
 723                 if ( false !== $f ) {
 724                         $this->mFragment = substr( $f, 1 );
 725                         $r = substr( $r, 0, strlen( $r ) - strlen( $f ) );
 726                 }
 727
 728                 # Reject illegal characters.
 729                 #
 730                 if( preg_match( $rxTc, $r ) ) {
 731                         wfProfileOut( $fname );
 732                         return false;
 733                 }
 734
 735                 # "." and ".." conflict with the directories of those namesa
 736                 if ( strpos( $r, '.' ) !== false &&
 737                      ( $r === '.' || $r === '..' ||
 738                        strpos( $r, './' ) === 0  ||
 739                        strpos( $r, '../' ) === 0 ||
 740                        strpos( $r, '/./' ) !== false ||
 741                        strpos( $r, '/../' ) !== false ) )
 742                 {
 743                         wfProfileOut( $fname );
 744                         return false;
 745                 }
 746
 747                 # Initial capital letter
 748                 if( $wgCapitalLinks && $this->mInterwiki == '') {
 749                         $t = $wgLang->ucfirst( $r );
 750                 } else {
 751                         $t = $r;
 752                 }
 753
 754                 # Fill fields
 755                 $this->mDbkeyform = $t;
 756                 $this->mUrlform = wfUrlencode( $t );
 757
 758                 $this->mTextform = str_replace( '_', ' ', $t );
 759
 760                 wfProfileOut( $fname );
 761                 return true;
 762         }
 763
 764         # Get a title object associated with the talk page of this article
 765         function getTalkPage() {
 766                 return Title::makeTitle( Namespace::getTalk( $this->getNamespace() ), $this->getDBkey() );
 767         }
 768
 769         # Get a title object associated with the subject page of this talk page
 770         function getSubjectPage() {
 771                 return Title::makeTitle( Namespace::getSubject( $this->getNamespace() ), $this->getDBkey() );
 772         }
 773
 774         # Get an array of Title objects linking to this title
 775         # Also stores the IDs in the link cache
 776         # $options may be FOR UPDATE
 777         function getLinksTo( $options = '' ) {
 778                 global $wgLinkCache;
 779                 $id = $this->getArticleID();
 780
 781                 if ( $options ) {
 782                         $db =& wfGetDB( DB_MASTER );
 783                 } else {
 784                         $db =& wfGetDB( DB_SLAVE );
 785                 }
 786                 $cur = $db->tableName( 'cur' );
 787                 $links = $db->tableName( 'links' );
 788
 789                 $sql = "SELECT cur_namespace,cur_title,cur_id FROM $cur,$links WHERE l_from=cur_id AND l_to={$id} $options";
 790                 $res = $db->query( $sql, "Title::getLinksTo" );
 791                 $retVal = array();
 792                 if ( $db->numRows( $res ) ) {
 793                         while ( $row = $db->fetchObject( $res ) ) {
 794                                 if ( $titleObj = Title::makeTitle( $row->cur_namespace, $row->cur_title ) ) {
 795                                         $wgLinkCache->addGoodLink( $row->cur_id, $titleObj->getPrefixedDBkey() );
 796                                         $retVal[] = $titleObj;
 797                                 }
 798                         }
 799                 }
 800                 $db->freeResult( $res );
 801                 return $retVal;
 802         }
 803
 804         # Get an array of Title objects linking to this non-existent title
 805         # Also stores the IDs in the link cache
 806         function getBrokenLinksTo( $options = '' ) {
 807                 global $wgLinkCache;
 808
 809                 if ( $options ) {
 810                         $db =& wfGetDB( DB_MASTER );
 811                 } else {
 812                         $db =& wfGetDB( DB_SLAVE );
 813                 }
 814                 $cur = $db->tableName( 'cur' );
 815                 $brokenlinks = $db->tableName( 'brokenlinks' );
 816                 $encTitle = $db->strencode( $this->getPrefixedDBkey() );
 817
 818                 $sql = "SELECT cur_namespace,cur_title,cur_id FROM $brokenlinks,$cur " .
 819                   "WHERE bl_from=cur_id AND bl_to='$encTitle' $options";
 820                 $res = $db->query( $sql, "Title::getBrokenLinksTo" );
 821                 $retVal = array();
 822                 if ( $db->numRows( $res ) ) {
 823                         while ( $row = $db->fetchObject( $res ) ) {
 824                                 $titleObj = Title::makeTitle( $row->cur_namespace, $row->cur_title );
 825                                 $wgLinkCache->addGoodLink( $row->cur_id, $titleObj->getPrefixedDBkey() );
 826                                 $retVal[] = $titleObj;
 827                         }
 828                 }
 829                 $db->freeResult( $res );
 830                 return $retVal;
 831         }
 832
 833         function getSquidURLs() {
 834                 return array(
 835                         $this->getInternalURL(),
 836                         $this->getInternalURL( 'action=history' )
 837                 );
 838         }
 839
 840         function moveNoAuth( &$nt ) {
 841                 return $this->moveTo( $nt, false );
 842         }
 843
 844         # Move a title to a new location
 845         # Returns true on success, message name on failure
 846         # auth indicates whether wgUser's permissions should be checked
 847         function moveTo( &$nt, $auth = true ) {
 848                 if( !$this or !$nt ) {
 849                         return 'badtitletext';
 850                 }
 851
 852                 $fname = 'Title::move';
 853                 $oldid = $this->getArticleID();
 854                 $newid = $nt->getArticleID();
 855
 856                 if ( strlen( $nt->getDBkey() ) < 1 ) {
 857                         return 'articleexists';
 858                 }
 859                 if ( ( ! Namespace::isMovable( $this->getNamespace() ) ) ||
 860                          ( '' == $this->getDBkey() ) ||
 861                          ( '' != $this->getInterwiki() ) ||
 862                          ( !$oldid ) ||
 863                      ( ! Namespace::isMovable( $nt->getNamespace() ) ) ||
 864                          ( '' == $nt->getDBkey() ) ||
 865                          ( '' != $nt->getInterwiki() ) ) {
 866                         return 'badarticleerror';
 867                 }
 868
 869                 if ( $auth && ( !$this->userCanEdit() || !$nt->userCanEdit() ) ) {
 870                         return 'protectedpage';
 871                 }
 872
 873                 # The move is allowed only if (1) the target doesn't exist, or
 874                 # (2) the target is a redirect to the source, and has no history
 875                 # (so we can undo bad moves right after they're done).
 876
 877                 if ( 0 != $newid ) { # Target exists; check for validity
 878                         if ( ! $this->isValidMoveTarget( $nt ) ) {
 879                                 return 'articleexists';
 880                         }
 881                         $this->moveOverExistingRedirect( $nt );
 882                 } else { # Target didn't exist, do normal move.
 883                         $this->moveToNewTitle( $nt, $newid );
 884                 }
 885
 886                 # Fixing category links (those without piped 'alternate' names) to be sorted under the new title
 887
 888                 $dbw =& wfGetDB( DB_MASTER );
 889                 $sql = "UPDATE categorylinks SET cl_sortkey=" . $dbw->addQuotes( $nt->getPrefixedText() ) .
 890                         " WHERE cl_from=" . $dbw->addQuotes( $this->getArticleID() ) .
 891                         " AND cl_sortkey=" . $dbw->addQuotes( $this->getPrefixedText() );
 892                 $dbw->query( $sql, "SpecialMovepage::doSubmit" );
 893
 894                 # Update watchlists
 895
 896                 $oldnamespace = $this->getNamespace() & ~1;
 897                 $newnamespace = $nt->getNamespace() & ~1;
 898                 $oldtitle = $this->getDBkey();
 899                 $newtitle = $nt->getDBkey();
 900
 901                 if( $oldnamespace != $newnamespace || $oldtitle != $newtitle ) {
 902                         WatchedItem::duplicateEntries( $this, $nt );
 903                 }
 904
 905                 # Update search engine
 906                 $u = new SearchUpdate( $oldid, $nt->getPrefixedDBkey() );
 907                 $u->doUpdate();
 908                 $u = new SearchUpdate( $newid, $this->getPrefixedDBkey(), "" );
 909                 $u->doUpdate();
 910
 911                 return true;
 912         }
 913
 914         # Move page to title which is presently a redirect to the source page
 915
 916         /* private */ function moveOverExistingRedirect( &$nt ) {
 917                 global $wgUser, $wgLinkCache, $wgUseSquid, $wgMwRedir;
 918                 $fname = 'Title::moveOverExistingRedirect';
 919                 $comment = wfMsg( "1movedto2", $this->getPrefixedText(), $nt->getPrefixedText() );
 920
 921         $now = wfTimestampNow();
 922         $won = wfInvertTimestamp( $now );
 923                 $newid = $nt->getArticleID();
 924                 $oldid = $this->getArticleID();
 925                 $dbw =& wfGetDB( DB_MASTER );
 926                 $links = $dbw->tableName( 'links' );
 927
 928                 # Change the name of the target page:
 929                 $dbw->updateArray( 'cur',
 930                         /* SET */ array(
 931                                 'cur_touched' => $now,
 932                                 'cur_namespace' => $nt->getNamespace(),
 933                                 'cur_title' => $nt->getDBkey()
 934                         ),
 935                         /* WHERE */ array( 'cur_id' => $oldid ),
 936                         $fname
 937                 );
 938                 $wgLinkCache->clearLink( $nt->getPrefixedDBkey() );
 939
 940                 # Repurpose the old redirect. We don't save it to history since
 941                 # by definition if we've got here it's rather uninteresting.
 942
 943                 $redirectText = $wgMwRedir->getSynonym( 0 ) . ' [[' . $nt->getPrefixedText() . "]]\n";
 944                 $dbw->updateArray( 'cur',
 945                         /* SET */ array(
 946                                 'cur_touched' => $now,
 947                                 'cur_timestamp' => $now,
 948                                 'inverse_timestamp' => $won,
 949                                 'cur_namespace' => $this->getNamespace(),
 950                                 'cur_title' => $this->getDBkey(),
 951                                 'cur_text' => $wgMwRedir->getSynonym( 0 ) . " [[" . $nt->getPrefixedText() . "]]\n",
 952                                 'cur_comment' => $comment,
 953                                 'cur_user' => $wgUser->getID(),
 954                                 'cur_minor_edit' => 0,
 955                                 'cur_counter' => 0,
 956                                 'cur_restrictions' => '',
 957                                 'cur_user_text' => $wgUser->getName(),
 958                                 'cur_is_redirect' => 1,
 959                                 'cur_is_new' => 1
 960                         ),
 961                         /* WHERE */ array( 'cur_id' => $newid ),
 962                         $fname
 963                 );
 964
 965                 $wgLinkCache->clearLink( $this->getPrefixedDBkey() );
 966
 967                 # Fix the redundant names for the past revisions of the target page.
 968                 # The redirect should have no old revisions.
 969                 $dbw->updateArray(
 970                         /* table */ 'old',
 971                         /* SET */ array(
 972                                 'old_namespace' => $nt->getNamespace(),
 973                                 'old_title' => $nt->getDBkey(),
 974                         ),
 975                         /* WHERE */ array(
 976                                 'old_namespace' => $this->getNamespace(),
 977                                 'old_title' => $this->getDBkey(),
 978                         ),
 979                         $fname
 980                 );
 981
 982                 RecentChange::notifyMoveOverRedirect( $now, $this, $nt, $wgUser, $comment );
 983
 984                 # Swap links
 985
 986                 # Load titles and IDs
 987                 $linksToOld = $this->getLinksTo( 'FOR UPDATE' );
 988                 $linksToNew = $nt->getLinksTo( 'FOR UPDATE' );
 989
 990                 # Delete them all
 991                 $sql = "DELETE FROM $links WHERE l_to=$oldid OR l_to=$newid";
 992                 $dbw->query( $sql, $fname );
 993
 994                 # Reinsert
 995                 if ( count( $linksToOld ) || count( $linksToNew )) {
 996                         $sql = "INSERT INTO $links (l_from,l_to) VALUES ";
 997                         $first = true;
 998
 999                         # Insert links to old title
1000                         foreach ( $linksToOld as $linkTitle ) {
1001                                 if ( $first ) {
1002                                         $first = false;
1003                                 } else {
1004                                         $sql .= ',';
1005                                 }
1006                                 $id = $linkTitle->getArticleID();
1007                                 $sql .= "($id,$newid)";
1008                         }
1009
1010                         # Insert links to new title
1011                         foreach ( $linksToNew as $linkTitle ) {
1012                                 if ( $first ) {
1013                                         $first = false;
1014                                 } else {
1015                                         $sql .= ',';
1016                                 }
1017                                 $id = $linkTitle->getArticleID();
1018                                 $sql .= "($id, $oldid)";
1019                         }
1020
1021                         $dbw->query( $sql, DB_MASTER, $fname );
1022                 }
1023
1024                 # Now, we record the link from the redirect to the new title.
1025                 # It should have no other outgoing links...
1026                 $dbw->delete( 'links', array( 'l_from' => $newid ) );
1027                 $dbw->insertArray( 'links', array( 'l_from' => $newid, 'l_to' => $oldid ) );
1028
1029                 # Clear linkscc
1030                 LinkCache::linksccClearLinksTo( $oldid );
1031                 LinkCache::linksccClearLinksTo( $newid );
1032
1033                 # Purge squid
1034                 if ( $wgUseSquid ) {
1035                         $urls = array_merge( $nt->getSquidURLs(), $this->getSquidURLs() );
1036                         $u = new SquidUpdate( $urls );
1037                         $u->doUpdate();
1038                 }
1039         }
1040
1041         # Move page to non-existing title.
1042         # Sets $newid to be the new article ID
1043
1044         /* private */ function moveToNewTitle( &$nt, &$newid ) {
1045                 global $wgUser, $wgLinkCache, $wgUseSquid;
1046                 $fname = 'MovePageForm::moveToNewTitle';
1047                 $comment = wfMsg( '1movedto2', $this->getPrefixedText(), $nt->getPrefixedText() );
1048
1049                 $now = wfTimestampNow();
1050                 $won = wfInvertTimestamp( $now );
1051                 $newid = $nt->getArticleID();
1052                 $oldid = $this->getArticleID();
1053                 $dbw =& wfGetDB( DB_MASTER );
1054
1055                 # Rename cur entry
1056                 $dbw->updateArray( 'cur',
1057                         /* SET */ array(
1058                                 'cur_touched' => $now,
1059                                 'cur_namespace' => $nt->getNamespace(),
1060                                 'cur_title' => $nt->getDBkey()
1061                         ),
1062                         /* WHERE */ array( 'cur_id' => $oldid ),
1063                         $fname
1064                 );
1065
1066                 $wgLinkCache->clearLink( $nt->getPrefixedDBkey() );
1067
1068                 # Insert redirct
1069                 $dbw->insertArray( 'cur', array(
1070                         'cur_namespace' => $this->getNamespace(),
1071                         'cur_title' => $this->getDBkey(),
1072                         'cur_comment' => $comment,
1073                         'cur_user' => $wgUser->getID(),
1074                         'cur_user_text' => $wgUser->getName(),
1075                         'cur_timestamp' => $now,
1076                         'inverse_timestamp' => $won,
1077                         'cur_touched' => $now,
1078                         'cur_is_redirect' => 1,
1079                         'cur_is_new' => 1,
1080                         'cur_text' => "#REDIRECT [[" . $nt->getPrefixedText() . "]]\n" ), $fname
1081                 );
1082                 $newid = $dbw->insertId();
1083                 $wgLinkCache->clearLink( $this->getPrefixedDBkey() );
1084
1085                 # Rename old entries
1086                 $dbw->updateArray(
1087                         /* table */ 'old',
1088                         /* SET */ array(
1089                                 'old_namespace' => $nt->getNamespace(),
1090                                 'old_title' => $nt->getDBkey()
1091                         ),
1092                         /* WHERE */ array(
1093                                 'old_namespace' => $this->getNamespace(),
1094                                 'old_title' => $this->getDBkey()
1095                         ), $fname
1096                 );
1097
1098                 # Record in RC
1099                 RecentChange::notifyMoveToNew( $now, $this, $nt, $wgUser, $comment );
1100
1101                 # Purge squid and linkscc as per article creation
1102                 Article::onArticleCreate( $nt );
1103
1104                 # Any text links to the old title must be reassigned to the redirect
1105                 $dbw->updateArray( 'links', array( 'l_to' => $newid ), array( 'l_to' => $oldid ), $fname );
1106                 LinkCache::linksccClearLinksTo( $oldid );
1107
1108                 # Record the just-created redirect's linking to the page
1109                 $dbw->insertArray( 'links', array( 'l_from' => $newid, 'l_to' => $oldid ), $fname );
1110
1111                 # Non-existent target may have had broken links to it; these must
1112                 # now be removed and made into good links.
1113                 $update = new LinksUpdate( $oldid, $nt->getPrefixedDBkey() );
1114                 $update->fixBrokenLinks();
1115
1116                 # Purge old title from squid
1117                 # The new title, and links to the new title, are purged in Article::onArticleCreate()
1118                 $titles = $nt->getLinksTo();
1119                 if ( $wgUseSquid ) {
1120                         $urls = $this->getSquidURLs();
1121                         foreach ( $titles as $linkTitle ) {
1122                                 $urls[] = $linkTitle->getInternalURL();
1123                         }
1124                         $u = new SquidUpdate( $urls );
1125                         $u->doUpdate();
1126                 }
1127         }
1128
1129         # Checks if $this can be moved to $nt
1130         # Selects for update, so don't call it unless you mean business
1131         function isValidMoveTarget( $nt ) {
1132                 $fname = 'Title::isValidMoveTarget';
1133                 $dbw =& wfGetDB( DB_MASTER );
1134
1135                 # Is it a redirect?
1136                 $id  = $nt->getArticleID();
1137                 $obj = $dbw->getArray( 'cur', array( 'cur_is_redirect','cur_text' ),
1138                         array( 'cur_id' => $id ), $fname, 'FOR UPDATE' );
1139
1140                 if ( !$obj || 0 == $obj->cur_is_redirect ) {
1141                         # Not a redirect
1142                         return false;
1143                 }
1144
1145                 # Does the redirect point to the source?
1146                 if ( preg_match( "/\\[\\[\\s*([^\\]\\|]*)]]/", $obj->cur_text, $m ) ) {
1147                         $redirTitle = Title::newFromText( $m[1] );
1148                         if( !is_object( $redirTitle ) ||
1149                                 $redirTitle->getPrefixedDBkey() != $this->getPrefixedDBkey() ) {
1150                                 return false;
1151                         }
1152                 }
1153
1154                 # Does the article have a history?
1155                 $row = $dbw->getArray( 'old', array( 'old_id' ),
1156                         array(
1157                                 'old_namespace' => $nt->getNamespace(),
1158                                 'old_title' => $nt->getDBkey()
1159                         ), $fname, 'FOR UPDATE'
1160                 );
1161
1162                 # Return true if there was no history
1163                 return $row === false;
1164         }
1165
1166         # Create a redirect, fails if the title already exists, does not notify RC
1167         # Returns success
1168         function createRedirect( $dest, $comment ) {
1169                 global $wgUser;
1170                 if ( $this->getArticleID() ) {
1171                         return false;
1172                 }
1173
1174                 $fname = "Title::createRedirect";
1175                 $dbw =& wfGetDB( DB_MASTER );
1176                 $now = wfTimestampNow();
1177                 $won = wfInvertTimestamp( $now );
1178                 $seqVal = $dbw->nextSequenceValue( 'cur_cur_id_seq' );
1179
1180                 $dbw->insertArray( 'cur', array(
1181                         'cur_id' => $seqVal,
1182                         'cur_namespace' => $this->getNamespace(),
1183                         'cur_title' => $this->getDBkey(),
1184                         'cur_comment' => $comment,
1185                         'cur_user' => $wgUser->getID(),
1186                         'cur_user_text' => $wgUser->getName(),
1187                         'cur_timestamp' => $now,
1188                         'inverse_timestamp' => $won,
1189                         'cur_touched' => $now,
1190                         'cur_is_redirect' => 1,
1191                         'cur_is_new' => 1,
1192                         'cur_text' => "#REDIRECT [[" . $dest->getPrefixedText() . "]]\n"
1193                 ), $fname );
1194                 $newid = $dbw->insertId();
1195                 $this->resetArticleID( $newid );
1196
1197                 # Link table
1198                 if ( $dest->getArticleID() ) {
1199                         $dbw->insertArray( 'links',
1200                                 array(
1201                                         'l_to' => $dest->getArticleID(),
1202                                         'l_from' => $newid
1203                                 ), $fname
1204                         );
1205                 } else {
1206                         $dbw->insertArray( 'brokenlinks',
1207                                 array(
1208                                         'bl_to' => $dest->getPrefixedDBkey(),
1209                                         'bl_from' => $newid
1210                                 ), $fname
1211                         );
1212                 }
1213
1214                 Article::onArticleCreate( $this );
1215                 return true;
1216         }
1217
1218         # Get categories to wich belong this title and return an array of
1219         # categories names.
1220         function getParentCategories( ) {
1221                 global $wgLang,$wgUser;
1222
1223                 $titlekey = $this->getArticleId();
1224                 $cns = Namespace::getCategory();
1225                 $sk =& $wgUser->getSkin();
1226                 $parents = array();
1227                 $dbr =& wfGetDB( DB_SLAVE );
1228                 $cur = $dbr->tableName( 'cur' );
1229                 $categorylinks = $dbr->tableName( 'categorylinks' );
1230
1231                 # get the parents categories of this title from the database
1232                 $sql = "SELECT DISTINCT cur_id FROM $cur,$categorylinks
1233                         WHERE cl_from='$titlekey' AND cl_to=cur_title AND cur_namespace='$cns'
1234                                 ORDER BY cl_sortkey" ;
1235                 $res = $dbr->query ( $sql ) ;
1236
1237                 if($dbr->numRows($res) > 0) {
1238                         while ( $x = $dbr->fetchObject ( $res ) ) $data[] = $x ;
1239                         $dbr->freeResult ( $res ) ;
1240                 } else {
1241                         $data = '';
1242                 }
1243                 return $data;
1244         }
1245
1246         # will get the parents and grand-parents
1247         # TODO : not sure what's happening when a loop happen like:
1248         #       Encyclopedia > Astronomy > Encyclopedia
1249         function getAllParentCategories(&$stack) {
1250                 global $wgUser,$wgLang;
1251                 $result = '';
1252
1253                 # getting parents
1254                 $parents = $this->getParentCategories( );
1255
1256                 if($parents == '')
1257                 {
1258                         # The current element has no more parent so we dump the stack
1259                         # and make a clean line of categories
1260                         $sk =& $wgUser->getSkin() ;
1261
1262                         foreach ( array_reverse($stack) as $child => $parent )
1263                         {
1264                                 # make a link of that parent
1265                                 $result .= $sk->makeLink($wgLang->getNSText ( Namespace::getCategory() ).":".$parent,$parent);
1266                                 $result .= ' &gt; ';
1267                                 $lastchild = $child;
1268                         }
1269                         # append the last child.
1270                         # TODO : We should have a last child unless there is an error in the
1271                         # "categorylinks" table.
1272                         if(isset($lastchild)) { $result .= $lastchild; }
1273
1274                         $result .= "<br/>\n";
1275
1276                         # now we can empty the stack
1277                         $stack = array();
1278
1279                 } else {
1280                         # look at parents of current category
1281                         foreach($parents as $parent)
1282                         {
1283                                 # create a title object for the parent
1284                                 $tpar = Title::newFromID($parent->cur_id);
1285                                 # add it to the stack
1286                                 $stack[$this->getText()] = $tpar->getText();
1287                                 # grab its parents
1288                                 $result .= $tpar->getAllParentCategories($stack);
1289                         }
1290                 }
1291
1292                 if(isset($result)) { return $result; }
1293                 else { return ''; };
1294         }
1295
1296         # Returns an associative array for selecting this title from cur
1297         function curCond() {
1298                 return array( 'cur_namespace' => $this->mNamespace, 'cur_title' => $this->mDbkeyform );
1299         }
1300
1301         function oldCond() {
1302                 return array( 'old_namespace' => $this->mNamespace, 'old_title' => $this->mDbkeyform );
1303         }
1304 }
1305 ?>