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         {
  35                 $this->mInterwiki = $this->mUrlform =
  36                 $this->mTextform = $this->mDbkeyform = "";
  37                 $this->mArticleID = -1;
  38                 $this->mNamespace = 0;
  39                 $this->mRestrictionsLoaded = false;
  40                 $this->mRestrictions = array();
  41         $this->mDefaultNamespace = 0;
  42         }
  43
  44         # From a prefixed DB key
  45         /* static */ function newFromDBkey( $key )
  46         {
  47                 $t = new Title();
  48                 $t->mDbkeyform = $key;
  49                 if( $t->secureAndSplit() )
  50                         return $t;
  51                 else
  52                         return NULL;
  53         }
  54
  55         # From text, such as what you would find in a link
  56         /* static */ function newFromText( $text, $defaultNamespace = 0 )
  57         {
  58                 $fname = "Title::newFromText";
  59                 wfProfileIn( $fname );
  60
  61                 if( is_object( $text ) ) {
  62                         wfDebugDieBacktrace( "Called with object instead of string." );
  63                 }
  64                 global $wgInputEncoding;
  65                 $text = do_html_entity_decode( $text, ENT_COMPAT, $wgInputEncoding );
  66
  67                 $text = wfMungeToUtf8( $text );
  68
  69
  70                 # What was this for? TS 2004-03-03
  71                 # $text = urldecode( $text );
  72
  73                 $t = new Title();
  74                 $t->mDbkeyform = str_replace( " ", "_", $text );
  75                 $t->mDefaultNamespace = $defaultNamespace;
  76
  77                 wfProfileOut( $fname );
  78                 if ( !is_object( $t ) ) {
  79                         var_dump( debug_backtrace() );
  80                 }
  81                 if( $t->secureAndSplit() ) {
  82                         return $t;
  83                 } else {
  84                         return NULL;
  85                 }
  86         }
  87
  88         # From a URL-encoded title
  89         /* static */ function newFromURL( $url )
  90         {
  91                 global $wgLang, $wgServer;
  92                 $t = new Title();
  93
  94                 # For compatibility with old buggy URLs. "+" is not valid in titles,
  95                 # but some URLs used it as a space replacement and they still come
  96                 # from some external search tools.
  97                 $s = str_replace( "+", " ", $url );
  98
  99                 # For links that came from outside, check for alternate/legacy
 100                 # character encoding.
 101                 wfDebug( "Servr: $wgServer\n" );
 102                 if( empty( $_SERVER["HTTP_REFERER"] ) ||
 103                         strncmp($wgServer, $_SERVER["HTTP_REFERER"], strlen( $wgServer ) ) )
 104                 {
 105                         $s = $wgLang->checkTitleEncoding( $s );
 106                 } else {
 107                         wfDebug( "Refer: {$_SERVER['HTTP_REFERER']}\n" );
 108                 }
 109
 110                 $t->mDbkeyform = str_replace( " ", "_", $s );
 111                 if( $t->secureAndSplit() ) {
 112                         # check that length of title is < cur_title size
 113                         $dbr =& wfGetDB( DB_SLAVE );
 114                         $maxSize = $dbr->textFieldSize( 'cur', 'cur_title' );
 115                         if ( $maxSize != -1 && strlen( $t->mDbkeyform ) > $maxSize ) {
 116                                 return NULL;
 117                         }
 118
 119                         return $t;
 120                 } else {
 121                         return NULL;
 122                 }
 123         }
 124
 125         # From a cur_id
 126         # This is inefficiently implemented, the cur row is requested but not
 127         # used for anything else
 128         /* static */ function newFromID( $id )
 129         {
 130                 $fname = "Title::newFromID";
 131                 $dbr =& wfGetDB( DB_SLAVE );
 132                 $row = $dbr->getArray( "cur", array( "cur_namespace", "cur_title" ),
 133                         array( "cur_id" => $id ), $fname );
 134                 if ( $row !== false ) {
 135                         $title = Title::makeTitle( $row->cur_namespace, $row->cur_title );
 136                 } else {
 137                         $title = NULL;
 138                 }
 139                 return $title;
 140         }
 141
 142         # From a namespace index and a DB key
 143         /* static */ function makeTitle( $ns, $title )
 144         {
 145                 $t = new Title();
 146                 $t->mDbkeyform = Title::makeName( $ns, $title );
 147                 if( $t->secureAndSplit() ) {
 148                         return $t;
 149                 } else {
 150                         return NULL;
 151                 }
 152         }
 153
 154         /* static */ function newMainPage()
 155         {
 156                 return Title::newFromText( wfMsg( "mainpage" ) );
 157         }
 158
 159         # Get the title object for a redirect
 160         # Returns NULL if the text is not a valid redirect
 161         /* static */ function newFromRedirect( $text ) {
 162                 global $wgMwRedir;
 163                 $rt = NULL;
 164                 if ( $wgMwRedir->matchStart( $text ) ) {
 165                         if ( preg_match( '/\\[\\[([^\\]\\|]+)[\\]\\|]/', $text, $m ) ) {
 166                                 $rt = Title::newFromText( $m[1] );
 167                         }
 168                 }
 169                 return $rt;
 170         }
 171
 172 #----------------------------------------------------------------------------
 173 #       Static functions
 174 #----------------------------------------------------------------------------
 175
 176         # Get the prefixed DB key associated with an ID
 177         /* static */ function nameOf( $id )
 178         {
 179                 $fname = 'Title::nameOf';
 180                 $dbr =& wfGetDB( DB_SLAVE );
 181
 182                 $s = $dbr->getArray( 'cur', array( 'cur_namespace','cur_title' ),  array( 'cur_id' => $id ), $fname );
 183                 if ( $s === false ) { return NULL; }
 184
 185                 $n = Title::makeName( $s->cur_namespace, $s->cur_title );
 186                 return $n;
 187         }
 188
 189         # Get a regex character class describing the legal characters in a link
 190         /* static */ function legalChars()
 191         {
 192                 # Missing characters:
 193                 #  * []|# Needed for link syntax
 194                 #  * % and + are corrupted by Apache when they appear in the path
 195                 #
 196                 # % seems to work though
 197                 #
 198                 # The problem with % is that URLs are double-unescaped: once by Apache's
 199                 # path conversion code, and again by PHP. So %253F, for example, becomes "?".
 200                 # Our code does not double-escape to compensate for this, indeed double escaping
 201                 # would break if the double-escaped title was passed in the query string
 202                 # rather than the path. This is a minor security issue because articles can be
 203                 # created such that they are hard to view or edit. -- TS
 204                 #
 205                 # Theoretically 0x80-0x9F of ISO 8859-1 should be disallowed, but
 206                 # this breaks interlanguage links
 207
 208                 $set = " %!\"$&'()*,\\-.\\/0-9:;=?@A-Z\\\\^_`a-z{}~\\x80-\\xFF";
 209                 return $set;
 210         }
 211
 212         # Returns a stripped-down a title string ready for the search index
 213         # Takes a namespace index and a text-form main part
 214         /* static */ function indexTitle( $ns, $title )
 215         {
 216                 global $wgDBminWordLen, $wgLang;
 217
 218                 $lc = SearchEngine::legalSearchChars() . "&#;";
 219                 $t = $wgLang->stripForSearch( $title );
 220                 $t = preg_replace( "/[^{$lc}]+/", " ", $t );
 221                 $t = strtolower( $t );
 222
 223                 # Handle 's, s'
 224                 $t = preg_replace( "/([{$lc}]+)'s( |$)/", "\\1 \\1's ", $t );
 225                 $t = preg_replace( "/([{$lc}]+)s'( |$)/", "\\1s ", $t );
 226
 227                 $t = preg_replace( "/\\s+/", " ", $t );
 228
 229                 if ( $ns == Namespace::getImage() ) {
 230                         $t = preg_replace( "/ (png|gif|jpg|jpeg|ogg)$/", "", $t );
 231                 }
 232                 return trim( $t );
 233         }
 234
 235         # Make a prefixed DB key from a DB key and a namespace index
 236         /* static */ function makeName( $ns, $title )
 237         {
 238                 global $wgLang;
 239
 240                 $n = $wgLang->getNsText( $ns );
 241                 if ( "" == $n ) { return $title; }
 242                 else { return "{$n}:{$title}"; }
 243         }
 244
 245         # Arguably static
 246         # Returns the URL associated with an interwiki prefix
 247         # The URL contains $1, which is replaced by the title
 248         function getInterwikiLink( $key )
 249         {
 250                 global $wgMemc, $wgDBname, $wgInterwikiExpiry, $wgTitleInterwikiCache;
 251                 $fname = 'Title::getInterwikiLink';
 252                 $k = "$wgDBname:interwiki:$key";
 253
 254                 if( array_key_exists( $k, $wgTitleInterwikiCache ) )
 255                         return $wgTitleInterwikiCache[$k]->iw_url;
 256
 257                 $s = $wgMemc->get( $k );
 258                 # Ignore old keys with no iw_local
 259                 if( $s && isset( $s->iw_local ) ) {
 260                         $wgTitleInterwikiCache[$k] = $s;
 261                         return $s->iw_url;
 262                 }
 263                 $dbr =& wfGetDB( DB_SLAVE );
 264                 $res = $dbr->select( 'interwiki', array( 'iw_url', 'iw_local' ), array( 'iw_prefix' => $key ), $fname );
 265                 if(!$res) return "";
 266
 267                 $s = $dbr->fetchObject( $res );
 268                 if(!$s) {
 269                         # Cache non-existence: create a blank object and save it to memcached
 270                         $s = (object)false;
 271                         $s->iw_url = "";
 272                         $s->iw_local = 0;
 273                 }
 274                 $wgMemc->set( $k, $s, $wgInterwikiExpiry );
 275                 $wgTitleInterwikiCache[$k] = $s;
 276                 return $s->iw_url;
 277         }
 278
 279         function isLocal() {
 280                 global $wgTitleInterwikiCache, $wgDBname;
 281
 282                 if ( $this->mInterwiki != "" ) {
 283                         # Make sure key is loaded into cache
 284                         $this->getInterwikiLink( $this->mInterwiki );
 285                         $k = "$wgDBname:interwiki:" . $this->mInterwiki;
 286                         return (bool)($wgTitleInterwikiCache[$k]->iw_local);
 287                 } else {
 288                         return true;
 289                 }
 290         }
 291
 292         # Update the cur_touched field for an array of title objects
 293         # Inefficient unless the IDs are already loaded into the link cache
 294         /* static */ function touchArray( $titles, $timestamp = "" ) {
 295                 if ( count( $titles ) == 0 ) {
 296                         return;
 297                 }
 298                 if ( $timestamp == "" ) {
 299                         $timestamp = wfTimestampNow();
 300                 }
 301                 $dbw =& wfGetDB( DB_MASTER );
 302                 $cur = $dbw->tableName( 'cur' );
 303                 $sql = "UPDATE $cur SET cur_touched='{$timestamp}' WHERE cur_id IN (";
 304                 $first = true;
 305
 306                 foreach ( $titles as $title ) {
 307                         if ( ! $first ) {
 308                                 $sql .= ",";
 309                         }
 310                         $first = false;
 311                         $sql .= $title->getArticleID();
 312                 }
 313                 $sql .= ")";
 314                 if ( ! $first ) {
 315                         $dbw->query( $sql, "Title::touchArray" );
 316                 }
 317         }
 318
 319 #----------------------------------------------------------------------------
 320 #       Other stuff
 321 #----------------------------------------------------------------------------
 322
 323         # Simple accessors
 324         # See the definitions at the top of this file
 325
 326         function getText() { return $this->mTextform; }
 327         function getPartialURL() { return $this->mUrlform; }
 328         function getDBkey() { return $this->mDbkeyform; }
 329         function getNamespace() { return $this->mNamespace; }
 330         function setNamespace( $n ) { $this->mNamespace = $n; }
 331         function getInterwiki() { return $this->mInterwiki; }
 332         function getFragment() { return $this->mFragment; }
 333         function getDefaultNamespace() { return $this->mDefaultNamespace; }
 334
 335         # Get title for search index
 336         function getIndexTitle()
 337         {
 338                 return Title::indexTitle( $this->mNamespace, $this->mTextform );
 339         }
 340
 341         # Get prefixed title with underscores
 342         function getPrefixedDBkey()
 343         {
 344                 $s = $this->prefix( $this->mDbkeyform );
 345                 $s = str_replace( " ", "_", $s );
 346                 return $s;
 347         }
 348
 349         # Get prefixed title with spaces
 350         # This is the form usually used for display
 351         function getPrefixedText()
 352         {
 353                 if ( empty( $this->mPrefixedText ) ) {
 354                         $s = $this->prefix( $this->mTextform );
 355                         $s = str_replace( "_", " ", $s );
 356                         $this->mPrefixedText = $s;
 357                 }
 358                 return $this->mPrefixedText;
 359         }
 360
 361         # As getPrefixedText(), plus fragment.
 362         function getFullText() {
 363                 $text = $this->getPrefixedText();
 364                 if( '' != $this->mFragment ) {
 365                         $text .= '#' . $this->mFragment;
 366                 }
 367                 return $text;
 368         }
 369
 370         # Get a URL-encoded title (not an actual URL) including interwiki
 371         function getPrefixedURL()
 372         {
 373                 $s = $this->prefix( $this->mDbkeyform );
 374                 $s = str_replace( " ", "_", $s );
 375
 376                 $s = wfUrlencode ( $s ) ;
 377
 378                 # Cleaning up URL to make it look nice -- is this safe?
 379                 $s = preg_replace( "/%3[Aa]/", ":", $s );
 380                 $s = preg_replace( "/%2[Ff]/", "/", $s );
 381                 $s = str_replace( "%28", "(", $s );
 382                 $s = str_replace( "%29", ")", $s );
 383
 384                 return $s;
 385         }
 386
 387         # Get a real URL referring to this title, with interwiki link and fragment
 388         function getFullURL( $query = "" )
 389         {
 390                 global $wgLang, $wgArticlePath, $wgServer, $wgScript;
 391
 392                 if ( "" == $this->mInterwiki ) {
 393                         $p = $wgArticlePath;
 394                         return $wgServer . $this->getLocalUrl( $query );
 395                 } else {
 396                         $baseUrl = $this->getInterwikiLink( $this->mInterwiki );
 397                         $namespace = $wgLang->getNsText( $this->mNamespace );
 398                         if ( "" != $namespace ) {
 399                                 # Can this actually happen? Interwikis shouldn't be parsed.
 400                                 $namepace .= ":";
 401                         }
 402                         $url = str_replace( "$1", $namespace . $this->mUrlform, $baseUrl );
 403                         if ( '' != $this->mFragment ) {
 404                                 $url .= '#' . $this->mFragment;
 405                         }
 406                         return $url;
 407                 }
 408         }
 409
 410         # Get a URL with an optional query string, no fragment
 411         # * If $query=="", it will use $wgArticlePath
 412         # * Returns a full for an interwiki link, loses any query string
 413         # * Optionally adds the server and escapes for HTML
 414         # * Setting $query to "-" makes an old-style URL with nothing in the
 415         #   query except a title
 416
 417         function getURL() {
 418                 die( "Call to obsolete obsolete function Title::getURL()" );
 419         }
 420
 421         function getLocalURL( $query = "" )
 422         {
 423                 global $wgLang, $wgArticlePath, $wgScript;
 424
 425                 if ( $this->isExternal() ) {
 426                         return $this->getFullURL();
 427                 }
 428
 429                 $dbkey = wfUrlencode( $this->getPrefixedDBkey() );
 430                 if ( $query == "" ) {
 431                         $url = str_replace( "$1", $dbkey, $wgArticlePath );
 432                 } else {
 433                         if ( $query == "-" ) {
 434                                 $query = "";
 435                         }
 436                         if ( $wgScript != "" ) {
 437                                 $url = "{$wgScript}?title={$dbkey}&{$query}";
 438                         } else {
 439                                 # Top level wiki
 440                                 $url = "/{$dbkey}?{$query}";
 441                         }
 442                 }
 443                 return $url;
 444         }
 445
 446         function escapeLocalURL( $query = "" ) {
 447                 return htmlspecialchars( $this->getLocalURL( $query ) );
 448         }
 449
 450         function escapeFullURL( $query = "" ) {
 451                 return htmlspecialchars( $this->getFullURL( $query ) );
 452         }
 453
 454         function getInternalURL( $query = "" ) {
 455                 # Used in various Squid-related code, in case we have a different
 456                 # internal hostname for the server than the exposed one.
 457                 global $wgInternalServer;
 458                 return $wgInternalServer . $this->getLocalURL( $query );
 459         }
 460
 461         # Get the edit URL, or a null string if it is an interwiki link
 462         function getEditURL()
 463         {
 464                 global $wgServer, $wgScript;
 465
 466                 if ( "" != $this->mInterwiki ) { return ""; }
 467                 $s = $this->getLocalURL( "action=edit" );
 468
 469                 return $s;
 470         }
 471
 472         # Get HTML-escaped displayable text
 473         # For the title field in <a> tags
 474         function getEscapedText()
 475         {
 476                 return htmlspecialchars( $this->getPrefixedText() );
 477         }
 478
 479         # Is the title interwiki?
 480         function isExternal() { return ( "" != $this->mInterwiki ); }
 481
 482         # Does the title correspond to a protected article?
 483         function isProtected()
 484         {
 485                 if ( -1 == $this->mNamespace ) { return true; }
 486                 $a = $this->getRestrictions();
 487                 if ( in_array( "sysop", $a ) ) { return true; }
 488                 return false;
 489         }
 490
 491         # Is the page a log page, i.e. one where the history is messed up by
 492         # LogPage.php? This used to be used for suppressing diff links in recent
 493         # changes, but now that's done by setting a flag in the recentchanges
 494         # table. Hence, this probably is no longer used.
 495         function isLog()
 496         {
 497                 if ( $this->mNamespace != Namespace::getWikipedia() ) {
 498                         return false;
 499                 }
 500                 if ( ( 0 == strcmp( wfMsg( "uploadlogpage" ), $this->mDbkeyform ) ) ||
 501                   ( 0 == strcmp( wfMsg( "dellogpage" ), $this->mDbkeyform ) ) ) {
 502                         return true;
 503                 }
 504                 return false;
 505         }
 506
 507         # Is $wgUser is watching this page?
 508         function userIsWatching()
 509         {
 510                 global $wgUser;
 511
 512                 if ( -1 == $this->mNamespace ) { return false; }
 513                 if ( 0 == $wgUser->getID() ) { return false; }
 514
 515                 return $wgUser->isWatched( $this );
 516         }
 517
 518         # Can $wgUser edit this page?
 519         function userCanEdit()
 520         {
 521                 global $wgUser;
 522                 if ( -1 == $this->mNamespace ) { return false; }
 523                 if ( NS_MEDIAWIKI == $this->mNamespace && !$wgUser->isSysop() ) { return false; }
 524                 # if ( 0 == $this->getArticleID() ) { return false; }
 525                 if ( $this->mDbkeyform == "_" ) { return false; }
 526                 # protect global styles and js
 527                 if ( NS_MEDIAWIKI == $this->mNamespace
 528                      && preg_match("/\\.(css|js)$/", $this->mTextform )
 529                      && !$wgUser->isSysop() )
 530                 { return false; }
 531                 //if ( $this->isCssJsSubpage() and !$this->userCanEditCssJsSubpage() ) { return false; }
 532                 # protect css/js subpages of user pages
 533                 # XXX: this might be better using restrictions
 534                 # XXX: Find a way to work around the php bug that prevents using $this->userCanEditCssJsSubpage() from working
 535                 if( Namespace::getUser() == $this->mNamespace
 536                         and preg_match("/\\.(css|js)$/", $this->mTextform )
 537                         and !$wgUser->isSysop()
 538                         and !preg_match("/^".preg_quote($wgUser->getName(), '/')."/", $this->mTextform) )
 539                 { return false; }
 540                 $ur = $wgUser->getRights();
 541                 foreach ( $this->getRestrictions() as $r ) {
 542                         if ( "" != $r && ( ! in_array( $r, $ur ) ) ) {
 543                                 return false;
 544                         }
 545                 }
 546                 return true;
 547         }
 548
 549         function userCanRead() {
 550                 global $wgUser;
 551                 global $wgWhitelistRead;
 552
 553                 if( 0 != $wgUser->getID() ) return true;
 554                 if( !is_array( $wgWhitelistRead ) ) return true;
 555
 556                 $name = $this->getPrefixedText();
 557                 if( in_array( $name, $wgWhitelistRead ) ) return true;
 558
 559                 # Compatibility with old settings
 560                 if( $this->getNamespace() == NS_MAIN ) {
 561                         if( in_array( ":" . $name, $wgWhitelistRead ) ) return true;
 562                 }
 563                 return false;
 564         }
 565
 566         function isCssJsSubpage() {
 567                 return ( Namespace::getUser() == $this->mNamespace and preg_match("/\\.(css|js)$/", $this->mTextform ) );
 568         }
 569         function isCssSubpage() {
 570                 return ( Namespace::getUser() == $this->mNamespace and preg_match("/\\.css$/", $this->mTextform ) );
 571         }
 572         function isJsSubpage() {
 573                 return ( Namespace::getUser() == $this->mNamespace and preg_match("/\\.js$/", $this->mTextform ) );
 574         }
 575         function userCanEditCssJsSubpage() {
 576                 # protect css/js subpages of user pages
 577                 # XXX: this might be better using restrictions
 578                 global $wgUser;
 579                 return ( $wgUser->isSysop() or preg_match("/^".preg_quote($wgUser->getName())."/", $this->mTextform) );
 580         }
 581
 582         # Accessor/initialisation for mRestrictions
 583         function getRestrictions()
 584         {
 585                 $id = $this->getArticleID();
 586                 if ( 0 == $id ) { return array(); }
 587
 588                 if ( ! $this->mRestrictionsLoaded ) {
 589                         $dbr =& wfGetDB( DB_SLAVE );
 590                         $res = $dbr->getField( "cur", "cur_restrictions", "cur_id=$id" );
 591                         $this->mRestrictions = explode( ",", trim( $res ) );
 592                         $this->mRestrictionsLoaded = true;
 593                 }
 594                 return $this->mRestrictions;
 595         }
 596
 597         # Is there a version of this page in the deletion archive?
 598         # Returns the number of archived revisions
 599         function isDeleted() {
 600                 $fname = 'Title::isDeleted';
 601                 $dbr =& wfGetDB( DB_SLAVE );
 602                 $n = $dbr->getField( 'archive', 'COUNT(*)', array( 'ar_namespace' => $this->getNamespace(),
 603                         'ar_title' => $this->getDBkey() ), $fname );
 604                 return (int)$n;
 605         }
 606
 607         # Get the article ID from the link cache
 608         # Used very heavily, e.g. in Parser::replaceInternalLinks()
 609         function getArticleID()
 610         {
 611                 global $wgLinkCache;
 612
 613                 if ( -1 != $this->mArticleID ) { return $this->mArticleID; }
 614                 $this->mArticleID = $wgLinkCache->addLinkObj( $this );
 615                 return $this->mArticleID;
 616         }
 617
 618         # This clears some fields in this object, and clears any associated keys in the
 619         # "bad links" section of $wgLinkCache. This is called from Article::insertNewArticle()
 620         # to allow loading of the new cur_id. It's also called from Article::doDeleteArticle()
 621         function resetArticleID( $newid )
 622         {
 623                 global $wgLinkCache;
 624                 $wgLinkCache->clearBadLink( $this->getPrefixedDBkey() );
 625
 626                 if ( 0 == $newid ) { $this->mArticleID = -1; }
 627                 else { $this->mArticleID = $newid; }
 628                 $this->mRestrictionsLoaded = false;
 629                 $this->mRestrictions = array();
 630         }
 631
 632         # Updates cur_touched
 633         # Called from LinksUpdate.php
 634         function invalidateCache() {
 635                 $now = wfTimestampNow();
 636                 $dbw =& wfGetDB( DB_MASTER );
 637                 $success = $dbw->updateArray( 'cur',
 638                         array( /* SET */
 639                                 'cur_touched' => wfTimestampNow()
 640                         ), array( /* WHERE */
 641                                 'cur_namespace' => $this->getNamespace() ,
 642                                 'cur_title' => $this->getDBkey()
 643                         ), 'Title::invalidateCache'
 644                 );
 645                 return $success;
 646         }
 647
 648         # Prefixes some arbitrary text with the namespace or interwiki prefix of this object
 649         /* private */ function prefix( $name )
 650         {
 651                 global $wgLang;
 652
 653                 $p = "";
 654                 if ( "" != $this->mInterwiki ) {
 655                         $p = $this->mInterwiki . ":";
 656                 }
 657                 if ( 0 != $this->mNamespace ) {
 658                         $p .= $wgLang->getNsText( $this->mNamespace ) . ":";
 659                 }
 660                 return $p . $name;
 661         }
 662
 663         # Secure and split - main initialisation function for this object
 664         #
 665         # Assumes that mDbkeyform has been set, and is urldecoded
 666     # and uses underscores, but not otherwise munged.  This function
 667     # removes illegal characters, splits off the interwiki and
 668     # namespace prefixes, sets the other forms, and canonicalizes
 669     # everything.
 670         #
 671         /* private */ function secureAndSplit()
 672         {
 673                 global $wgLang, $wgLocalInterwiki, $wgCapitalLinks;
 674                 $fname = "Title::secureAndSplit";
 675                 wfProfileIn( $fname );
 676
 677                 static $imgpre = false;
 678                 static $rxTc = false;
 679
 680                 # Initialisation
 681                 if ( $imgpre === false ) {
 682                         $imgpre = ":" . $wgLang->getNsText( Namespace::getImage() ) . ":";
 683                         # % is needed as well
 684                         $rxTc = "/[^" . Title::legalChars() . "]/";
 685                 }
 686
 687                 $this->mInterwiki = $this->mFragment = "";
 688                 $this->mNamespace = $this->mDefaultNamespace; # Usually NS_MAIN
 689
 690                 # Clean up whitespace
 691                 #
 692                 $t = preg_replace( "/[\\s_]+/", "_", $this->mDbkeyform );
 693                 $t = preg_replace( '/^_*(.*?)_*$/', '$1', $t );
 694
 695                 if ( "" == $t ) {
 696                         wfProfileOut( $fname );
 697                         return false;
 698                 }
 699
 700                 $this->mDbkeyform = $t;
 701                 $done = false;
 702
 703                 # :Image: namespace
 704                 if ( 0 == strncasecmp( $imgpre, $t, strlen( $imgpre ) ) ) {
 705                         $t = substr( $t, 1 );
 706                 }
 707
 708                 # Initial colon indicating main namespace
 709                 if ( ":" == $t{0} ) {
 710                         $r = substr( $t, 1 );
 711                         $this->mNamespace = NS_MAIN;
 712                 } else {
 713                         # Namespace or interwiki prefix
 714                         if ( preg_match( "/^(.+?)_*:_*(.*)$/", $t, $m ) ) {
 715                                 #$p = strtolower( $m[1] );
 716                                 $p = $m[1];
 717                                 $lowerNs = strtolower( $p );
 718                                 if ( $ns = Namespace::getCanonicalIndex( $lowerNs ) ) {
 719                                         # Canonical namespace
 720                                         $t = $m[2];
 721                                         $this->mNamespace = $ns;
 722                                 } elseif ( $ns = $wgLang->getNsIndex( $lowerNs )) {
 723                                         # Ordinary namespace
 724                                         $t = $m[2];
 725                                         $this->mNamespace = $ns;
 726                                 } elseif ( $this->getInterwikiLink( $p ) ) {
 727                                         # Interwiki link
 728                                         $t = $m[2];
 729                                         $this->mInterwiki = $p;
 730
 731                                         if ( !preg_match( "/^([A-Za-z0-9_\\x80-\\xff]+):(.*)$/", $t, $m ) ) {
 732                                                 $done = true;
 733                                         } elseif($this->mInterwiki != $wgLocalInterwiki) {
 734                                                 $done = true;
 735                                         }
 736                                 }
 737                         }
 738                         $r = $t;
 739                 }
 740
 741                 # Redundant interwiki prefix to the local wiki
 742                 if ( 0 == strcmp( $this->mInterwiki, $wgLocalInterwiki ) ) {
 743                         $this->mInterwiki = "";
 744                 }
 745                 # We already know that some pages won't be in the database!
 746                 #
 747                 if ( "" != $this->mInterwiki || -1 == $this->mNamespace ) {
 748                         $this->mArticleID = 0;
 749                 }
 750                 $f = strstr( $r, "#" );
 751                 if ( false !== $f ) {
 752                         $this->mFragment = substr( $f, 1 );
 753                         $r = substr( $r, 0, strlen( $r ) - strlen( $f ) );
 754                 }
 755
 756                 # Reject illegal characters.
 757                 #
 758                 if( preg_match( $rxTc, $r ) ) {
 759                         wfProfileOut( $fname );
 760                         return false;
 761                 }
 762
 763                 # "." and ".." conflict with the directories of those namesa
 764                 if ( strpos( $r, "." ) !== false &&
 765                      ( $r === "." || $r === ".." ||
 766                        strpos( $r, "./" ) === 0  ||
 767                        strpos( $r, "../" ) === 0 ||
 768                        strpos( $r, "/./" ) !== false ||
 769                        strpos( $r, "/../" ) !== false ) )
 770                 {
 771                         wfProfileOut( $fname );
 772                         return false;
 773                 }
 774
 775                 # Initial capital letter
 776                 if( $wgCapitalLinks && $this->mInterwiki == "") {
 777                         $t = $wgLang->ucfirst( $r );
 778                 } else {
 779                         $t = $r;
 780                 }
 781
 782                 # Fill fields
 783                 $this->mDbkeyform = $t;
 784                 $this->mUrlform = wfUrlencode( $t );
 785
 786                 $this->mTextform = str_replace( "_", " ", $t );
 787
 788                 wfProfileOut( $fname );
 789                 return true;
 790         }
 791
 792         # Get a title object associated with the talk page of this article
 793         function getTalkPage() {
 794                 return Title::makeTitle( Namespace::getTalk( $this->getNamespace() ), $this->getDBkey() );
 795         }
 796
 797         # Get a title object associated with the subject page of this talk page
 798         function getSubjectPage() {
 799                 return Title::makeTitle( Namespace::getSubject( $this->getNamespace() ), $this->getDBkey() );
 800         }
 801
 802         # Get an array of Title objects linking to this title
 803         # Also stores the IDs in the link cache
 804         # $options may be FOR UPDATE
 805         function getLinksTo( $options = '' ) {
 806                 global $wgLinkCache;
 807                 $id = $this->getArticleID();
 808
 809                 if ( $options ) {
 810                         $db =& wfGetDB( DB_MASTER );
 811                 } else {
 812                         $db =& wfGetDB( DB_SLAVE );
 813                 }
 814                 $cur = $db->tableName( 'cur' );
 815                 $links = $db->tableName( 'links' );
 816
 817                 $sql = "SELECT cur_namespace,cur_title,cur_id FROM $cur,$links WHERE l_from=cur_id AND l_to={$id} $options";
 818                 $res = $db->query( $sql, "Title::getLinksTo" );
 819                 $retVal = array();
 820                 if ( $db->numRows( $res ) ) {
 821                         while ( $row = $db->fetchObject( $res ) ) {
 822                                 if ( $titleObj = Title::makeTitle( $row->cur_namespace, $row->cur_title ) ) {
 823                                         $wgLinkCache->addGoodLink( $row->cur_id, $titleObj->getPrefixedDBkey() );
 824                                         $retVal[] = $titleObj;
 825                                 }
 826                         }
 827                 }
 828                 $db->freeResult( $res );
 829                 return $retVal;
 830         }
 831
 832         # Get an array of Title objects linking to this non-existent title
 833         # Also stores the IDs in the link cache
 834         function getBrokenLinksTo( $options = '' ) {
 835                 global $wgLinkCache;
 836
 837                 if ( $options ) {
 838                         $db =& wfGetDB( DB_MASTER );
 839                 } else {
 840                         $db =& wfGetDB( DB_SLAVE );
 841                 }
 842                 $cur = $db->tableName( 'cur' );
 843                 $brokenlinks = $db->tableName( 'brokenlinks' );
 844                 $encTitle = $db->strencode( $this->getPrefixedDBkey() );
 845
 846                 $sql = "SELECT cur_namespace,cur_title,cur_id FROM $brokenlinks,$cur " .
 847                   "WHERE bl_from=cur_id AND bl_to='$encTitle' $options";
 848                 $res = $db->query( $sql, "Title::getBrokenLinksTo" );
 849                 $retVal = array();
 850                 if ( $db->numRows( $res ) ) {
 851                         while ( $row = $db->fetchObject( $res ) ) {
 852                                 $titleObj = Title::makeTitle( $row->cur_namespace, $row->cur_title );
 853                                 $wgLinkCache->addGoodLink( $row->cur_id, $titleObj->getPrefixedDBkey() );
 854                                 $retVal[] = $titleObj;
 855                         }
 856                 }
 857                 $db->freeResult( $res );
 858                 return $retVal;
 859         }
 860
 861         function getSquidURLs() {
 862                 return array(
 863                         $this->getInternalURL(),
 864                         $this->getInternalURL( "action=history" )
 865                 );
 866         }
 867
 868         function moveNoAuth( &$nt ) {
 869                 return $this->moveTo( $nt, false );
 870         }
 871
 872         # Move a title to a new location
 873         # Returns true on success, message name on failure
 874         # auth indicates whether wgUser's permissions should be checked
 875         function moveTo( &$nt, $auth = true ) {
 876                 if( !$this or !$nt ) {
 877                         return "badtitletext";
 878                 }
 879
 880                 $fname = "Title::move";
 881                 $oldid = $this->getArticleID();
 882                 $newid = $nt->getArticleID();
 883
 884                 if ( strlen( $nt->getDBkey() ) < 1 ) {
 885                         return "articleexists";
 886                 }
 887                 if ( ( ! Namespace::isMovable( $this->getNamespace() ) ) ||
 888                          ( "" == $this->getDBkey() ) ||
 889                          ( "" != $this->getInterwiki() ) ||
 890                          ( !$oldid ) ||
 891                      ( ! Namespace::isMovable( $nt->getNamespace() ) ) ||
 892                          ( "" == $nt->getDBkey() ) ||
 893                          ( "" != $nt->getInterwiki() ) ) {
 894                         return "badarticleerror";
 895                 }
 896
 897                 if ( $auth && ( !$this->userCanEdit() || !$nt->userCanEdit() ) ) {
 898                         return "protectedpage";
 899                 }
 900
 901                 # The move is allowed only if (1) the target doesn't exist, or
 902                 # (2) the target is a redirect to the source, and has no history
 903                 # (so we can undo bad moves right after they're done).
 904
 905                 if ( 0 != $newid ) { # Target exists; check for validity
 906                         if ( ! $this->isValidMoveTarget( $nt ) ) {
 907                                 return "articleexists";
 908                         }
 909                         $this->moveOverExistingRedirect( $nt );
 910                 } else { # Target didn't exist, do normal move.
 911                         $this->moveToNewTitle( $nt, $newid );
 912                 }
 913
 914                 # Fixing category links (those without piped 'alternate' names) to be sorted under the new title
 915
 916                 $dbw =& wfGetDB( DB_MASTER );
 917                 $sql = "UPDATE categorylinks SET cl_sortkey=" . $dbw->addQuotes( $nt->getPrefixedText() ) .
 918                         " WHERE cl_from=" . $dbw->addQuotes( $this->getArticleID() ) .
 919                         " AND cl_sortkey=" . $dbw->addQuotes( $this->getPrefixedText() );
 920                 $dbw->query( $sql, "SpecialMovepage::doSubmit" );
 921
 922                 # Update watchlists
 923
 924                 $oldnamespace = $this->getNamespace() & ~1;
 925                 $newnamespace = $nt->getNamespace() & ~1;
 926                 $oldtitle = $this->getDBkey();
 927                 $newtitle = $nt->getDBkey();
 928
 929                 if( $oldnamespace != $newnamespace || $oldtitle != $newtitle ) {
 930                         WatchedItem::duplicateEntries( $this, $nt );
 931                 }
 932
 933                 # Update search engine
 934                 $u = new SearchUpdate( $oldid, $nt->getPrefixedDBkey() );
 935                 $u->doUpdate();
 936                 $u = new SearchUpdate( $newid, $this->getPrefixedDBkey(), "" );
 937                 $u->doUpdate();
 938
 939                 return true;
 940         }
 941
 942         # Move page to title which is presently a redirect to the source page
 943
 944         /* private */ function moveOverExistingRedirect( &$nt )
 945         {
 946                 global $wgUser, $wgLinkCache, $wgUseSquid, $wgMwRedir;
 947                 $fname = "Title::moveOverExistingRedirect";
 948                 $comment = wfMsg( "1movedto2", $this->getPrefixedText(), $nt->getPrefixedText() );
 949
 950         $now = wfTimestampNow();
 951         $won = wfInvertTimestamp( $now );
 952                 $newid = $nt->getArticleID();
 953                 $oldid = $this->getArticleID();
 954                 $dbw =& wfGetDB( DB_MASTER );
 955                 $links = $dbw->tableName( 'links' );
 956
 957                 # Change the name of the target page:
 958                 $dbw->updateArray( 'cur',
 959                         /* SET */ array(
 960                                 'cur_touched' => $now,
 961                                 'cur_namespace' => $nt->getNamespace(),
 962                                 'cur_title' => $nt->getDBkey()
 963                         ),
 964                         /* WHERE */ array( 'cur_id' => $oldid ),
 965                         $fname
 966                 );
 967                 $wgLinkCache->clearLink( $nt->getPrefixedDBkey() );
 968
 969                 # Repurpose the old redirect. We don't save it to history since
 970                 # by definition if we've got here it's rather uninteresting.
 971
 972                 $redirectText = $wgMwRedir->getSynonym( 0 ) . " [[" . $nt->getPrefixedText() . "]]\n";
 973                 $dbw->updateArray( 'cur',
 974                         /* SET */ array(
 975                                 'cur_touched' => $now,
 976                                 'cur_timestamp' => $now,
 977                                 'inverse_timestamp' => $won,
 978                                 'cur_namespace' => $this->getNamespace(),
 979                                 'cur_title' => $this->getDBkey(),
 980                                 'cur_text' => $wgMwRedir->getSynonym( 0 ) . " [[" . $nt->getPrefixedText() . "]]\n",
 981                                 'cur_comment' => $comment,
 982                                 'cur_user' => $wgUser->getID(),
 983                                 'cur_minor_edit' => 0,
 984                                 'cur_counter' => 0,
 985                                 'cur_restrictions' => '',
 986                                 'cur_user_text' => $wgUser->getName(),
 987                                 'cur_is_redirect' => 1,
 988                                 'cur_is_new' => 1
 989                         ),
 990                         /* WHERE */ array( 'cur_id' => $newid ),
 991                         $fname
 992                 );
 993
 994                 $wgLinkCache->clearLink( $this->getPrefixedDBkey() );
 995
 996                 # Fix the redundant names for the past revisions of the target page.
 997                 # The redirect should have no old revisions.
 998                 $dbw->updateArray(
 999                         /* table */ 'old',
1000                         /* SET */ array(
1001                                 'old_namespace' => $nt->getNamespace(),
1002                                 'old_title' => $nt->getDBkey(),
1003                         ),
1004                         /* WHERE */ array(
1005                                 'old_namespace' => $this->getNamespace(),
1006                                 'old_title' => $this->getDBkey(),
1007                         ),
1008                         $fname
1009                 );
1010
1011                 RecentChange::notifyMoveOverRedirect( $now, $this, $nt, $wgUser, $comment );
1012
1013                 # Swap links
1014
1015                 # Load titles and IDs
1016                 $linksToOld = $this->getLinksTo( 'FOR UPDATE' );
1017                 $linksToNew = $nt->getLinksTo( 'FOR UPDATE' );
1018
1019                 # Delete them all
1020                 $sql = "DELETE FROM $links WHERE l_to=$oldid OR l_to=$newid";
1021                 $dbw->query( $sql, $fname );
1022
1023                 # Reinsert
1024                 if ( count( $linksToOld ) || count( $linksToNew )) {
1025                         $sql = "INSERT INTO $links (l_from,l_to) VALUES ";
1026                         $first = true;
1027
1028                         # Insert links to old title
1029                         foreach ( $linksToOld as $linkTitle ) {
1030                                 if ( $first ) {
1031                                         $first = false;
1032                                 } else {
1033                                         $sql .= ",";
1034                                 }
1035                                 $id = $linkTitle->getArticleID();
1036                                 $sql .= "($id,$newid)";
1037                         }
1038
1039                         # Insert links to new title
1040                         foreach ( $linksToNew as $linkTitle ) {
1041                                 if ( $first ) {
1042                                         $first = false;
1043                                 } else {
1044                                         $sql .= ",";
1045                                 }
1046                                 $id = $linkTitle->getArticleID();
1047                                 $sql .= "($id, $oldid)";
1048                         }
1049
1050                         $dbw->query( $sql, DB_MASTER, $fname );
1051                 }
1052
1053                 # Now, we record the link from the redirect to the new title.
1054                 # It should have no other outgoing links...
1055                 $dbw->delete( 'links', array( 'l_from' => $newid ) );
1056                 $dbw->insertArray( 'links', array( 'l_from' => $newid, 'l_to' => $oldid ) );
1057
1058                 # Clear linkscc
1059                 LinkCache::linksccClearLinksTo( $oldid );
1060                 LinkCache::linksccClearLinksTo( $newid );
1061
1062                 # Purge squid
1063                 if ( $wgUseSquid ) {
1064                         $urls = array_merge( $nt->getSquidURLs(), $this->getSquidURLs() );
1065                         $u = new SquidUpdate( $urls );
1066                         $u->doUpdate();
1067                 }
1068         }
1069
1070         # Move page to non-existing title.
1071         # Sets $newid to be the new article ID
1072
1073         /* private */ function moveToNewTitle( &$nt, &$newid )
1074         {
1075                 global $wgUser, $wgLinkCache, $wgUseSquid;
1076                 $fname = "MovePageForm::moveToNewTitle";
1077                 $comment = wfMsg( "1movedto2", $this->getPrefixedText(), $nt->getPrefixedText() );
1078
1079                 $now = wfTimestampNow();
1080                 $won = wfInvertTimestamp( $now );
1081                 $newid = $nt->getArticleID();
1082                 $oldid = $this->getArticleID();
1083                 $dbw =& wfGetDB( DB_MASTER );
1084
1085                 # Rename cur entry
1086                 $dbw->updateArray( 'cur',
1087                         /* SET */ array(
1088                                 'cur_touched' => $now,
1089                                 'cur_namespace' => $nt->getNamespace(),
1090                                 'cur_title' => $nt->getDBkey()
1091                         ),
1092                         /* WHERE */ array( 'cur_id' => $oldid ),
1093                         $fname
1094                 );
1095
1096                 $wgLinkCache->clearLink( $nt->getPrefixedDBkey() );
1097
1098                 # Insert redirct
1099                 $dbw->insertArray( 'cur', array(
1100                         'cur_namespace' => $this->getNamespace(),
1101                         'cur_title' => $this->getDBkey(),
1102                         'cur_comment' => $comment,
1103                         'cur_user' => $wgUser->getID(),
1104                         'cur_user_text' => $wgUser->getName(),
1105                         'cur_timestamp' => $now,
1106                         'inverse_timestamp' => $won,
1107                         'cur_touched' => $now,
1108                         'cur_is_redirect' => 1,
1109                         'cur_is_new' => 1,
1110                         'cur_text' => "#REDIRECT [[" . $nt->getPrefixedText() . "]]\n" ), $fname
1111                 );
1112                 $newid = $dbw->insertId();
1113                 $wgLinkCache->clearLink( $this->getPrefixedDBkey() );
1114
1115                 # Rename old entries
1116                 $dbw->updateArray(
1117                         /* table */ 'old',
1118                         /* SET */ array(
1119                                 'old_namespace' => $nt->getNamespace(),
1120                                 'old_title' => $nt->getDBkey()
1121                         ),
1122                         /* WHERE */ array(
1123                                 'old_namespace' => $this->getNamespace(),
1124                                 'old_title' => $this->getDBkey()
1125                         ), $fname
1126                 );
1127
1128                 # Record in RC
1129                 RecentChange::notifyMoveToNew( $now, $this, $nt, $wgUser, $comment );
1130
1131                 # Purge squid and linkscc as per article creation
1132                 Article::onArticleCreate( $nt );
1133
1134                 # Any text links to the old title must be reassigned to the redirect
1135                 $dbw->updateArray( 'links', array( 'l_to' => $newid ), array( 'l_to' => $oldid ), $fname );
1136                 LinkCache::linksccClearLinksTo( $oldid );
1137
1138                 # Record the just-created redirect's linking to the page
1139                 $dbw->insertArray( 'links', array( 'l_from' => $newid, 'l_to' => $oldid ), $fname );
1140
1141                 # Non-existent target may have had broken links to it; these must
1142                 # now be removed and made into good links.
1143                 $update = new LinksUpdate( $oldid, $nt->getPrefixedDBkey() );
1144                 $update->fixBrokenLinks();
1145
1146                 # Purge old title from squid
1147                 # The new title, and links to the new title, are purged in Article::onArticleCreate()
1148                 $titles = $nt->getLinksTo();
1149                 if ( $wgUseSquid ) {
1150                         $urls = $this->getSquidURLs();
1151                         foreach ( $titles as $linkTitle ) {
1152                                 $urls[] = $linkTitle->getInternalURL();
1153                         }
1154                         $u = new SquidUpdate( $urls );
1155                         $u->doUpdate();
1156                 }
1157         }
1158
1159         # Checks if $this can be moved to $nt
1160         # Selects for update, so don't call it unless you mean business
1161         function isValidMoveTarget( $nt )
1162         {
1163                 $fname = "Title::isValidMoveTarget";
1164                 $dbw =& wfGetDB( DB_MASTER );
1165
1166                 # Is it a redirect?
1167                 $id  = $nt->getArticleID();
1168                 $obj = $dbw->getArray( 'cur', array( 'cur_is_redirect','cur_text' ),
1169                         array( 'cur_id' => $id ), $fname, 'FOR UPDATE' );
1170
1171                 if ( !$obj || 0 == $obj->cur_is_redirect ) {
1172                         # Not a redirect
1173                         return false;
1174                 }
1175
1176                 # Does the redirect point to the source?
1177                 if ( preg_match( "/\\[\\[\\s*([^\\]\\|]*)]]/", $obj->cur_text, $m ) ) {
1178                         $redirTitle = Title::newFromText( $m[1] );
1179                         if( !is_object( $redirTitle ) ||
1180                                 $redirTitle->getPrefixedDBkey() != $this->getPrefixedDBkey() ) {
1181                                 return false;
1182                         }
1183                 }
1184
1185                 # Does the article have a history?
1186                 $row = $dbw->getArray( 'old', array( 'old_id' ),
1187                         array(
1188                                 'old_namespace' => $nt->getNamespace(),
1189                                 'old_title' => $nt->getDBkey()
1190                         ), $fname, 'FOR UPDATE'
1191                 );
1192
1193                 # Return true if there was no history
1194                 return $row === false;
1195         }
1196
1197         # Create a redirect, fails if the title already exists, does not notify RC
1198         # Returns success
1199         function createRedirect( $dest, $comment ) {
1200                 global $wgUser;
1201                 if ( $this->getArticleID() ) {
1202                         return false;
1203                 }
1204
1205                 $fname = "Title::createRedirect";
1206                 $dbw =& wfGetDB( DB_MASTER );
1207                 $now = wfTimestampNow();
1208                 $won = wfInvertTimestamp( $now );
1209                 $seqVal = $dbw->nextSequenceValue( 'cur_cur_id_seq' );
1210
1211                 $dbw->insertArray( 'cur', array(
1212                         'cur_id' => $seqVal,
1213                         'cur_namespace' => $this->getNamespace(),
1214                         'cur_title' => $this->getDBkey(),
1215                         'cur_comment' => $comment,
1216                         'cur_user' => $wgUser->getID(),
1217                         'cur_user_text' => $wgUser->getName(),
1218                         'cur_timestamp' => $now,
1219                         'inverse_timestamp' => $won,
1220                         'cur_touched' => $now,
1221                         'cur_is_redirect' => 1,
1222                         'cur_is_new' => 1,
1223                         'cur_text' => "#REDIRECT [[" . $dest->getPrefixedText() . "]]\n"
1224                 ), $fname );
1225                 $newid = $dbw->insertId();
1226                 $this->resetArticleID( $newid );
1227
1228                 # Link table
1229                 if ( $dest->getArticleID() ) {
1230                         $dbw->insertArray( 'links',
1231                                 array(
1232                                         'l_to' => $dest->getArticleID(),
1233                                         'l_from' => $newid
1234                                 ), $fname
1235                         );
1236                 } else {
1237                         $dbw->insertArray( 'brokenlinks',
1238                                 array(
1239                                         'bl_to' => $dest->getPrefixedDBkey(),
1240                                         'bl_from' => $newid
1241                                 ), $fname
1242                         );
1243                 }
1244
1245                 Article::onArticleCreate( $this );
1246                 return true;
1247         }
1248
1249         # Get categories to wich belong this title and return an array of
1250         # categories names.
1251         function getParentCategories( )
1252         {
1253                 global $wgLang,$wgUser;
1254
1255                 $titlekey = $this->getArticleId();
1256                 $cns = Namespace::getCategory();
1257                 $sk =& $wgUser->getSkin();
1258                 $parents = array();
1259                 $dbr =& wfGetDB( DB_SLAVE );
1260                 $cur = $dbr->tableName( 'cur' );
1261                 $categorylinks = $dbr->tableName( 'categorylinks' );
1262
1263                 # get the parents categories of this title from the database
1264                 $sql = "SELECT DISTINCT cur_id FROM $cur,$categorylinks
1265                         WHERE cl_from='$titlekey' AND cl_to=cur_title AND cur_namespace='$cns'
1266                                 ORDER BY cl_sortkey" ;
1267                 $res = $dbr->query ( $sql ) ;
1268
1269                 if($dbr->numRows($res) > 0) {
1270                         while ( $x = $dbr->fetchObject ( $res ) ) $data[] = $x ;
1271                         $dbr->freeResult ( $res ) ;
1272                 } else {
1273                         $data = '';
1274                 }
1275                 return $data;
1276         }
1277
1278         # will get the parents and grand-parents
1279         # TODO : not sure what's happening when a loop happen like:
1280         #       Encyclopedia > Astronomy > Encyclopedia
1281         function getAllParentCategories(&$stack)
1282         {
1283                 global $wgUser,$wgLang;
1284                 $result = '';
1285
1286                 # getting parents
1287                 $parents = $this->getParentCategories( );
1288
1289                 if($parents == '')
1290                 {
1291                         # The current element has no more parent so we dump the stack
1292                         # and make a clean line of categories
1293                         $sk =& $wgUser->getSkin() ;
1294
1295                         foreach ( array_reverse($stack) as $child => $parent )
1296                         {
1297                                 # make a link of that parent
1298                                 $result .= $sk->makeLink($wgLang->getNSText ( Namespace::getCategory() ).":".$parent,$parent);
1299                                 $result .= ' &gt; ';
1300                                 $lastchild = $child;
1301                         }
1302                         # append the last child.
1303                         # TODO : We should have a last child unless there is an error in the
1304                         # "categorylinks" table.
1305                         if(isset($lastchild)) { $result .= $lastchild; }
1306
1307                         $result .= "<br/>\n";
1308
1309                         # now we can empty the stack
1310                         $stack = array();
1311
1312                 } else {
1313                         # look at parents of current category
1314                         foreach($parents as $parent)
1315                         {
1316                                 # create a title object for the parent
1317                                 $tpar = Title::newFromID($parent->cur_id);
1318                                 # add it to the stack
1319                                 $stack[$this->getText()] = $tpar->getText();
1320                                 # grab its parents
1321                                 $result .= $tpar->getAllParentCategories($stack);
1322                         }
1323                 }
1324
1325                 if(isset($result)) { return $result; }
1326                 else { return ''; };
1327         }
1328
1329         # Returns an associative array for selecting this title from cur
1330         function curCond() {
1331                 return array( 'cur_namespace' => $this->mNamespace, 'cur_title' => $this->mDbkeyform );
1332         }
1333
1334         function oldCond() {
1335                 return array( 'old_namespace' => $this->mNamespace, 'old_title' => $this->mDbkeyform );
1336         }
1337 }
1338 ?>