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
  12 define ( 'GAID_FOR_UPDATE', 1 );
  13
  14 class Title {
  15         # All member variables should be considered private
  16         # Please use the accessor functions
  17
  18         var $mTextform;           # Text form (spaces not underscores) of the main part
  19         var $mUrlform;            # URL-encoded form of the main part
  20         var $mDbkeyform;          # Main part with underscores
  21         var $mNamespace;          # Namespace index, i.e. one of the NS_xxxx constants
  22         var $mInterwiki;          # Interwiki prefix (or null string)
  23         var $mFragment;           # Title fragment (i.e. the bit after the #)
  24         var $mArticleID;          # Article ID, fetched from the link cache on demand
  25         var $mRestrictions;       # Array of groups allowed to edit this article
  26                               # Only null or "sysop" are supported
  27         var $mRestrictionsLoaded; # Boolean for initialisation on demand
  28         var $mPrefixedText;       # Text form including namespace/interwiki, initialised on demand
  29         var $mDefaultNamespace;   # Namespace index when there is no namespace
  30                               # Zero except in {{transclusion}} tags
  31
  32 #----------------------------------------------------------------------------
  33 #   Construction
  34 #----------------------------------------------------------------------------
  35
  36         /* private */ function Title() {
  37                 $this->mInterwiki = $this->mUrlform =
  38                 $this->mTextform = $this->mDbkeyform = '';
  39                 $this->mArticleID = -1;
  40                 $this->mNamespace = 0;
  41                 $this->mRestrictionsLoaded = false;
  42                 $this->mRestrictions = array();
  43         $this->mDefaultNamespace = 0;
  44         }
  45
  46         # From a prefixed DB key
  47         /* static */ function newFromDBkey( $key ) {
  48                 $t = new Title();
  49                 $t->mDbkeyform = $key;
  50                 if( $t->secureAndSplit() )
  51                         return $t;
  52                 else
  53                         return NULL;
  54         }
  55
  56         # From text, such as what you would find in a link
  57         /* static */ function newFromText( $text, $defaultNamespace = 0 ) {
  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                 global $wgLang, $wgServer;
  91                 $t = new Title();
  92
  93                 # For compatibility with old buggy URLs. "+" is not valid in titles,
  94                 # but some URLs used it as a space replacement and they still come
  95                 # from some external search tools.
  96                 $s = str_replace( '+', ' ', $url );
  97
  98                 # For links that came from outside, check for alternate/legacy
  99                 # character encoding.
 100                 wfDebug( "Servr: $wgServer\n" );
 101                 if( empty( $_SERVER['HTTP_REFERER'] ) ||
 102                         strncmp($wgServer, $_SERVER['HTTP_REFERER'], strlen( $wgServer ) ) )
 103                 {
 104                         $s = $wgLang->checkTitleEncoding( $s );
 105                 } else {
 106                         wfDebug( "Refer: {$_SERVER['HTTP_REFERER']}\n" );
 107                 }
 108
 109                 $t->mDbkeyform = str_replace( ' ', '_', $s );
 110                 if( $t->secureAndSplit() ) {
 111                         # check that length of title is < cur_title size
 112                         $dbr =& wfGetDB( DB_SLAVE );
 113                         $maxSize = $dbr->textFieldSize( 'cur', 'cur_title' );
 114                         if ( $maxSize != -1 && strlen( $t->mDbkeyform ) > $maxSize ) {
 115                                 return NULL;
 116                         }
 117
 118                         return $t;
 119                 } else {
 120                         return NULL;
 121                 }
 122         }
 123
 124         # From a cur_id
 125         # This is inefficiently implemented, the cur row is requested but not
 126         # used for anything else
 127         /* static */ function newFromID( $id ) {
 128                 $fname = 'Title::newFromID';
 129                 $dbr =& wfGetDB( DB_SLAVE );
 130                 $row = $dbr->getArray( 'cur', array( 'cur_namespace', 'cur_title' ),
 131                         array( 'cur_id' => $id ), $fname );
 132                 if ( $row !== false ) {
 133                         $title = Title::makeTitle( $row->cur_namespace, $row->cur_title );
 134                 } else {
 135                         $title = NULL;
 136                 }
 137                 return $title;
 138         }
 139
 140         # From a namespace index and a DB key
 141         /* static */ function makeTitle( $ns, $title ) {
 142                 $t = new Title();
 143                 $t->mDbkeyform = Title::makeName( $ns, $title );
 144                 if( $t->secureAndSplit() ) {
 145                         return $t;
 146                 } else {
 147                         return NULL;
 148                 }
 149         }
 150
 151         /* static */ function newMainPage() {
 152                 return Title::newFromText( wfMsg( 'mainpage' ) );
 153         }
 154
 155         # Get the title object for a redirect
 156         # Returns NULL if the text is not a valid redirect
 157         /* static */ function newFromRedirect( $text ) {
 158                 global $wgMwRedir;
 159                 $rt = NULL;
 160                 if ( $wgMwRedir->matchStart( $text ) ) {
 161                         if ( preg_match( '/\\[\\[([^\\]\\|]+)[\\]\\|]/', $text, $m ) ) {
 162                                 $rt = Title::newFromText( $m[1] );
 163                         }
 164                 }
 165                 return $rt;
 166         }
 167
 168 #----------------------------------------------------------------------------
 169 #       Static functions
 170 #----------------------------------------------------------------------------
 171
 172         # Get the prefixed DB key associated with an ID
 173         /* static */ function nameOf( $id ) {
 174                 $fname = 'Title::nameOf';
 175                 $dbr =& wfGetDB( DB_SLAVE );
 176
 177                 $s = $dbr->getArray( 'cur', array( 'cur_namespace','cur_title' ),  array( 'cur_id' => $id ), $fname );
 178                 if ( $s === false ) { return NULL; }
 179
 180                 $n = Title::makeName( $s->cur_namespace, $s->cur_title );
 181                 return $n;
 182         }
 183
 184         # Get a regex character class describing the legal characters in a link
 185         /* static */ function legalChars() {
 186                 # Missing characters:
 187                 #  * []|# Needed for link syntax
 188                 #  * % and + are corrupted by Apache when they appear in the path
 189                 #
 190                 # % seems to work though
 191                 #
 192                 # The problem with % is that URLs are double-unescaped: once by Apache's
 193                 # path conversion code, and again by PHP. So %253F, for example, becomes "?".
 194                 # Our code does not double-escape to compensate for this, indeed double escaping
 195                 # would break if the double-escaped title was passed in the query string
 196                 # rather than the path. This is a minor security issue because articles can be
 197                 # created such that they are hard to view or edit. -- TS
 198                 #
 199                 # Theoretically 0x80-0x9F of ISO 8859-1 should be disallowed, but
 200                 # this breaks interlanguage links
 201
 202                 $set = " %!\"$&'()*,\\-.\\/0-9:;=?@A-Z\\\\^_`a-z{}~\\x80-\\xFF";
 203                 return $set;
 204         }
 205
 206         # Returns a stripped-down a title string ready for the search index
 207         # Takes a namespace index and a text-form main part
 208         /* static */ function indexTitle( $ns, $title ) {
 209                 global $wgDBminWordLen, $wgLang;
 210
 211                 $lc = SearchEngine::legalSearchChars() . '&#;';
 212                 $t = $wgLang->stripForSearch( $title );
 213                 $t = preg_replace( "/[^{$lc}]+/", ' ', $t );
 214                 $t = strtolower( $t );
 215
 216                 # Handle 's, s'
 217                 $t = preg_replace( "/([{$lc}]+)'s( |$)/", "\\1 \\1's ", $t );
 218                 $t = preg_replace( "/([{$lc}]+)s'( |$)/", "\\1s ", $t );
 219
 220                 $t = preg_replace( "/\\s+/", ' ', $t );
 221
 222                 if ( $ns == Namespace::getImage() ) {
 223                         $t = preg_replace( "/ (png|gif|jpg|jpeg|ogg)$/", "", $t );
 224                 }
 225                 return trim( $t );
 226         }
 227
 228         # Make a prefixed DB key from a DB key and a namespace index
 229         /* static */ function makeName( $ns, $title ) {
 230                 global $wgLang;
 231
 232                 $n = $wgLang->getNsText( $ns );
 233                 if ( "" == $n ) { return $title; }
 234                 else { return "{$n}:{$title}"; }
 235         }
 236
 237         # Arguably static
 238         # Returns the URL associated with an interwiki prefix
 239         # The URL contains $1, which is replaced by the title
 240         function getInterwikiLink( $key ) {
 241                 global $wgMemc, $wgDBname, $wgInterwikiExpiry, $wgTitleInterwikiCache;
 242                 $fname = 'Title::getInterwikiLink';
 243                 $k = $wgDBname.':interwiki:'.$key;
 244
 245                 if( array_key_exists( $k, $wgTitleInterwikiCache ) )
 246                         return $wgTitleInterwikiCache[$k]->iw_url;
 247
 248                 $s = $wgMemc->get( $k );
 249                 # Ignore old keys with no iw_local
 250                 if( $s && isset( $s->iw_local ) ) {
 251                         $wgTitleInterwikiCache[$k] = $s;
 252                         return $s->iw_url;
 253                 }
 254                 $dbr =& wfGetDB( DB_SLAVE );
 255                 $res = $dbr->select( 'interwiki', array( 'iw_url', 'iw_local' ), array( 'iw_prefix' => $key ), $fname );
 256                 if(!$res) return "";
 257
 258                 $s = $dbr->fetchObject( $res );
 259                 if(!$s) {
 260                         # Cache non-existence: create a blank object and save it to memcached
 261                         $s = (object)false;
 262                         $s->iw_url = "";
 263                         $s->iw_local = 0;
 264                 }
 265                 $wgMemc->set( $k, $s, $wgInterwikiExpiry );
 266                 $wgTitleInterwikiCache[$k] = $s;
 267                 return $s->iw_url;
 268         }
 269
 270         function isLocal() {
 271                 global $wgTitleInterwikiCache, $wgDBname;
 272
 273                 if ( $this->mInterwiki != '' ) {
 274                         # Make sure key is loaded into cache
 275                         $this->getInterwikiLink( $this->mInterwiki );
 276                         $k = $wgDBname.':interwiki:' . $this->mInterwiki;
 277                         return (bool)($wgTitleInterwikiCache[$k]->iw_local);
 278                 } else {
 279                         return true;
 280                 }
 281         }
 282
 283         # Update the cur_touched field for an array of title objects
 284         # Inefficient unless the IDs are already loaded into the link cache
 285         /* static */ function touchArray( $titles, $timestamp = '' ) {
 286                 if ( count( $titles ) == 0 ) {
 287                         return;
 288                 }
 289                 if ( $timestamp == '' ) {
 290                         $timestamp = wfTimestampNow();
 291                 }
 292                 $dbw =& wfGetDB( DB_MASTER );
 293                 $cur = $dbw->tableName( 'cur' );
 294                 $sql = "UPDATE $cur SET cur_touched='{$timestamp}' WHERE cur_id IN (";
 295                 $first = true;
 296
 297                 foreach ( $titles as $title ) {
 298                         if ( ! $first ) {
 299                                 $sql .= ',';
 300                         }
 301                         $first = false;
 302                         $sql .= $title->getArticleID();
 303                 }
 304                 $sql .= ')';
 305                 if ( ! $first ) {
 306                         $dbw->query( $sql, 'Title::touchArray' );
 307                 }
 308         }
 309
 310 #----------------------------------------------------------------------------
 311 #       Other stuff
 312 #----------------------------------------------------------------------------
 313
 314         # Simple accessors
 315         # See the definitions at the top of this file
 316
 317         function getText() { return $this->mTextform; }
 318         function getPartialURL() { return $this->mUrlform; }
 319         function getDBkey() { return $this->mDbkeyform; }
 320         function getNamespace() { return $this->mNamespace; }
 321         function setNamespace( $n ) { $this->mNamespace = $n; }
 322         function getInterwiki() { return $this->mInterwiki; }
 323         function getFragment() { return $this->mFragment; }
 324         function getDefaultNamespace() { return $this->mDefaultNamespace; }
 325
 326         # Get title for search index
 327         function getIndexTitle() {
 328                 return Title::indexTitle( $this->mNamespace, $this->mTextform );
 329         }
 330
 331         # Get prefixed title with underscores
 332         function getPrefixedDBkey() {
 333                 $s = $this->prefix( $this->mDbkeyform );
 334                 $s = str_replace( ' ', '_', $s );
 335                 return $s;
 336         }
 337
 338         # Get prefixed title with spaces
 339         # This is the form usually used for display
 340         function getPrefixedText() {
 341                 if ( empty( $this->mPrefixedText ) ) {
 342                         $s = $this->prefix( $this->mTextform );
 343                         $s = str_replace( '_', ' ', $s );
 344                         $this->mPrefixedText = $s;
 345                 }
 346                 return $this->mPrefixedText;
 347         }
 348
 349         # As getPrefixedText(), plus fragment.
 350         function getFullText() {
 351                 $text = $this->getPrefixedText();
 352                 if( '' != $this->mFragment ) {
 353                         $text .= '#' . $this->mFragment;
 354                 }
 355                 return $text;
 356         }
 357
 358         # Get a URL-encoded title (not an actual URL) including interwiki
 359         function getPrefixedURL() {
 360                 $s = $this->prefix( $this->mDbkeyform );
 361                 $s = str_replace( ' ', '_', $s );
 362
 363                 $s = wfUrlencode ( $s ) ;
 364
 365                 # Cleaning up URL to make it look nice -- is this safe?
 366                 $s = preg_replace( '/%3[Aa]/', ':', $s );
 367                 $s = preg_replace( '/%2[Ff]/', '/', $s );
 368                 $s = str_replace( '%28', '(', $s );
 369                 $s = str_replace( '%29', ')', $s );
 370
 371                 return $s;
 372         }
 373
 374         # Get a real URL referring to this title, with interwiki link and fragment
 375         function getFullURL( $query = '' ) {
 376                 global $wgLang, $wgArticlePath, $wgServer, $wgScript;
 377
 378                 if ( '' == $this->mInterwiki ) {
 379                         $p = $wgArticlePath;
 380                         return $wgServer . $this->getLocalUrl( $query );
 381                 } else {
 382                         $baseUrl = $this->getInterwikiLink( $this->mInterwiki );
 383                         $namespace = $wgLang->getNsText( $this->mNamespace );
 384                         if ( '' != $namespace ) {
 385                                 # Can this actually happen? Interwikis shouldn't be parsed.
 386                                 $namepace .= ':';
 387                         }
 388                         $url = str_replace( '$1', $namespace . $this->mUrlform, $baseUrl );
 389                         if ( '' != $this->mFragment ) {
 390                                 $url .= '#' . $this->mFragment;
 391                         }
 392                         return $url;
 393                 }
 394         }
 395
 396         # Get a URL with an optional query string, no fragment
 397         # * If $query=="", it will use $wgArticlePath
 398         # * Returns a full for an interwiki link, loses any query string
 399         # * Optionally adds the server and escapes for HTML
 400         # * Setting $query to "-" makes an old-style URL with nothing in the
 401         #   query except a title
 402
 403         function getURL() {
 404                 die( 'Call to obsolete obsolete function Title::getURL()' );
 405         }
 406
 407         function getLocalURL( $query = '' ) {
 408                 global $wgLang, $wgArticlePath, $wgScript;
 409
 410                 if ( $this->isExternal() ) {
 411                         return $this->getFullURL();
 412                 }
 413
 414                 $dbkey = wfUrlencode( $this->getPrefixedDBkey() );
 415                 if ( $query == '' ) {
 416                         $url = str_replace( '$1', $dbkey, $wgArticlePath );
 417                 } else {
 418                         if ( $query == '-' ) {
 419                                 $query = '';
 420                         }
 421                         if ( $wgScript != '' ) {
 422                                 $url = "{$wgScript}?title={$dbkey}&{$query}";
 423                         } else {
 424                                 # Top level wiki
 425                                 $url = "/{$dbkey}?{$query}";
 426                         }
 427                 }
 428                 return $url;
 429         }
 430
 431         function escapeLocalURL( $query = '' ) {
 432                 return htmlspecialchars( $this->getLocalURL( $query ) );
 433         }
 434
 435         function escapeFullURL( $query = '' ) {
 436                 return htmlspecialchars( $this->getFullURL( $query ) );
 437         }
 438
 439         function getInternalURL( $query = '' ) {
 440                 # Used in various Squid-related code, in case we have a different
 441                 # internal hostname for the server than the exposed one.
 442                 global $wgInternalServer;
 443                 return $wgInternalServer . $this->getLocalURL( $query );
 444         }
 445
 446         # Get the edit URL, or a null string if it is an interwiki link
 447         function getEditURL() {
 448                 global $wgServer, $wgScript;
 449
 450                 if ( '' != $this->mInterwiki ) { return ''; }
 451                 $s = $this->getLocalURL( 'action=edit' );
 452
 453                 return $s;
 454         }
 455
 456         # Get HTML-escaped displayable text
 457         # For the title field in <a> tags
 458         function getEscapedText() {
 459                 return htmlspecialchars( $this->getPrefixedText() );
 460         }
 461
 462         # Is the title interwiki?
 463         function isExternal() { return ( '' != $this->mInterwiki ); }
 464
 465         # Does the title correspond to a protected article?
 466         function isProtected() {
 467                 if ( -1 == $this->mNamespace ) { return true; }
 468                 $a = $this->getRestrictions();
 469                 if ( in_array( 'sysop', $a ) ) { return true; }
 470                 return false;
 471         }
 472
 473         # Is the page a log page, i.e. one where the history is messed up by
 474         # LogPage.php? This used to be used for suppressing diff links in recent
 475         # changes, but now that's done by setting a flag in the recentchanges
 476         # table. Hence, this probably is no longer used.
 477         function isLog() {
 478                 if ( $this->mNamespace != Namespace::getWikipedia() ) {
 479                         return false;
 480                 }
 481                 if ( ( 0 == strcmp( wfMsg( 'uploadlogpage' ), $this->mDbkeyform ) ) ||
 482                   ( 0 == strcmp( wfMsg( 'dellogpage' ), $this->mDbkeyform ) ) ) {
 483                         return true;
 484                 }
 485                 return false;
 486         }
 487
 488         # Is $wgUser is watching this page?
 489         function userIsWatching() {
 490                 global $wgUser;
 491
 492                 if ( -1 == $this->mNamespace ) { return false; }
 493                 if ( 0 == $wgUser->getID() ) { return false; }
 494
 495                 return $wgUser->isWatched( $this );
 496         }
 497
 498         # Can $wgUser edit this page?
 499         function userCanEdit() {
 500                 global $wgUser;
 501                 if ( -1 == $this->mNamespace ) { return false; }
 502                 if ( NS_MEDIAWIKI == $this->mNamespace && !$wgUser->isSysop() ) { return false; }
 503                 # if ( 0 == $this->getArticleID() ) { return false; }
 504                 if ( $this->mDbkeyform == '_' ) { return false; }
 505                 # protect global styles and js
 506                 if ( NS_MEDIAWIKI == $this->mNamespace
 507                      && preg_match("/\\.(css|js)$/", $this->mTextform )
 508                      && !$wgUser->isSysop() )
 509                 { return false; }
 510                 //if ( $this->isCssJsSubpage() and !$this->userCanEditCssJsSubpage() ) { return false; }
 511                 # protect css/js subpages of user pages
 512                 # XXX: this might be better using restrictions
 513                 # XXX: Find a way to work around the php bug that prevents using $this->userCanEditCssJsSubpage() from working
 514                 if( Namespace::getUser() == $this->mNamespace
 515                         and preg_match("/\\.(css|js)$/", $this->mTextform )
 516                         and !$wgUser->isSysop()
 517                         and !preg_match('/^'.preg_quote($wgUser->getName(), '/').'/', $this->mTextform) )
 518                 { return false; }
 519                 $ur = $wgUser->getRights();
 520                 foreach ( $this->getRestrictions() as $r ) {
 521                         if ( '' != $r && ( ! in_array( $r, $ur ) ) ) {
 522                                 return false;
 523                         }
 524                 }
 525                 return true;
 526         }
 527
 528         function userCanRead() {
 529                 global $wgUser;
 530                 global $wgWhitelistRead;
 531
 532                 if( 0 != $wgUser->getID() ) return true;
 533                 if( !is_array( $wgWhitelistRead ) ) return true;
 534
 535                 $name = $this->getPrefixedText();
 536                 if( in_array( $name, $wgWhitelistRead ) ) return true;
 537
 538                 # Compatibility with old settings
 539                 if( $this->getNamespace() == NS_MAIN ) {
 540                         if( in_array( ":" . $name, $wgWhitelistRead ) ) return true;
 541                 }
 542                 return false;
 543         }
 544
 545         function isCssJsSubpage() {
 546                 return ( Namespace::getUser() == $this->mNamespace and preg_match("/\\.(css|js)$/", $this->mTextform ) );
 547         }
 548         function isCssSubpage() {
 549                 return ( Namespace::getUser() == $this->mNamespace and preg_match("/\\.css$/", $this->mTextform ) );
 550         }
 551         function isJsSubpage() {
 552                 return ( Namespace::getUser() == $this->mNamespace and preg_match("/\\.js$/", $this->mTextform ) );
 553         }
 554         function userCanEditCssJsSubpage() {
 555                 # protect css/js subpages of user pages
 556                 # XXX: this might be better using restrictions
 557                 global $wgUser;
 558                 return ( $wgUser->isSysop() or preg_match('/^'.preg_quote($wgUser->getName()).'/', $this->mTextform) );
 559         }
 560
 561         # Accessor/initialisation for mRestrictions
 562         function getRestrictions() {
 563                 $id = $this->getArticleID();
 564                 if ( 0 == $id ) { return array(); }
 565
 566                 if ( ! $this->mRestrictionsLoaded ) {
 567                         $dbr =& wfGetDB( DB_SLAVE );
 568                         $res = $dbr->getField( 'cur', 'cur_restrictions', 'cur_id='.$id );
 569                         $this->mRestrictions = explode( ',', trim( $res ) );
 570                         $this->mRestrictionsLoaded = true;
 571                 }
 572                 return $this->mRestrictions;
 573         }
 574
 575         # Is there a version of this page in the deletion archive?
 576         # Returns the number of archived revisions
 577         function isDeleted() {
 578                 $fname = 'Title::isDeleted';
 579                 $dbr =& wfGetDB( DB_SLAVE );
 580                 $n = $dbr->getField( 'archive', 'COUNT(*)', array( 'ar_namespace' => $this->getNamespace(),
 581                         'ar_title' => $this->getDBkey() ), $fname );
 582                 return (int)$n;
 583         }
 584
 585         # Get the article ID from the link cache
 586         # $flags is a bit field, may be GAID_FOR_UPDATE to select for update
 587         function getArticleID( $flags = 0 ) {
 588                 global $wgLinkCache;
 589
 590                 if ( $flags & GAID_FOR_UPDATE ) {
 591                         $oldUpdate = $wgLinkCache->forUpdate( true );
 592                         $this->mArticleID = $wgLinkCache->addLinkObj( $this );
 593                         $wgLinkCache->forUpdate( $oldUpdate );
 594                 } else {
 595                         if ( -1 == $this->mArticleID ) {
 596                                 $this->mArticleID = $wgLinkCache->addLinkObj( $this );
 597                         }
 598                 }
 599                 return $this->mArticleID;
 600         }
 601
 602         # This clears some fields in this object, and clears any associated keys in the
 603         # "bad links" section of $wgLinkCache. This is called from Article::insertNewArticle()
 604         # to allow loading of the new cur_id. It's also called from Article::doDeleteArticle()
 605         function resetArticleID( $newid ) {
 606                 global $wgLinkCache;
 607                 $wgLinkCache->clearBadLink( $this->getPrefixedDBkey() );
 608
 609                 if ( 0 == $newid ) { $this->mArticleID = -1; }
 610                 else { $this->mArticleID = $newid; }
 611                 $this->mRestrictionsLoaded = false;
 612                 $this->mRestrictions = array();
 613         }
 614
 615         # Updates cur_touched
 616         # Called from LinksUpdate.php
 617         function invalidateCache() {
 618                 $now = wfTimestampNow();
 619                 $dbw =& wfGetDB( DB_MASTER );
 620                 $success = $dbw->updateArray( 'cur',
 621                         array( /* SET */
 622                                 'cur_touched' => wfTimestampNow()
 623                         ), array( /* WHERE */
 624                                 'cur_namespace' => $this->getNamespace() ,
 625                                 'cur_title' => $this->getDBkey()
 626                         ), 'Title::invalidateCache'
 627                 );
 628                 return $success;
 629         }
 630
 631         # Prefixes some arbitrary text with the namespace or interwiki prefix of this object
 632         /* private */ function prefix( $name ) {
 633                 global $wgLang;
 634
 635                 $p = '';
 636                 if ( '' != $this->mInterwiki ) {
 637                         $p = $this->mInterwiki . ':';
 638                 }
 639                 if ( 0 != $this->mNamespace ) {
 640                         $p .= $wgLang->getNsText( $this->mNamespace ) . ':';
 641                 }
 642                 return $p . $name;
 643         }
 644
 645         # Secure and split - main initialisation function for this object
 646         #
 647         # Assumes that mDbkeyform has been set, and is urldecoded
 648     # and uses underscores, but not otherwise munged.  This function
 649     # removes illegal characters, splits off the interwiki and
 650     # namespace prefixes, sets the other forms, and canonicalizes
 651     # everything.
 652         #
 653         /* private */ function secureAndSplit()
 654         {
 655                 global $wgLang, $wgLocalInterwiki, $wgCapitalLinks;
 656                 $fname = 'Title::secureAndSplit';
 657                 wfProfileIn( $fname );
 658
 659                 static $imgpre = false;
 660                 static $rxTc = false;
 661
 662                 # Initialisation
 663                 if ( $imgpre === false ) {
 664                         $imgpre = ':' . $wgLang->getNsText( Namespace::getImage() ) . ":";
 665                         # % is needed as well
 666                         $rxTc = '/[^' . Title::legalChars() . ']/';
 667                 }
 668
 669                 $this->mInterwiki = $this->mFragment = '';
 670                 $this->mNamespace = $this->mDefaultNamespace; # Usually NS_MAIN
 671
 672                 # Clean up whitespace
 673                 #
 674                 $t = preg_replace( "/[\\s_]+/", '_', $this->mDbkeyform );
 675                 $t = preg_replace( '/^_*(.*?)_*$/', '$1', $t );
 676
 677                 if ( '' == $t ) {
 678                         wfProfileOut( $fname );
 679                         return false;
 680                 }
 681
 682                 $this->mDbkeyform = $t;
 683                 $done = false;
 684
 685                 # :Image: namespace
 686                 if ( 0 == strncasecmp( $imgpre, $t, strlen( $imgpre ) ) ) {
 687                         $t = substr( $t, 1 );
 688                 }
 689
 690                 # Initial colon indicating main namespace
 691                 if ( ':' == $t{0} ) {
 692                         $r = substr( $t, 1 );
 693                         $this->mNamespace = NS_MAIN;
 694                 } else {
 695                         # Namespace or interwiki prefix
 696                         if ( preg_match( "/^(.+?)_*:_*(.*)$/", $t, $m ) ) {
 697                                 #$p = strtolower( $m[1] );
 698                                 $p = $m[1];
 699                                 $lowerNs = strtolower( $p );
 700                                 if ( $ns = Namespace::getCanonicalIndex( $lowerNs ) ) {
 701                                         # Canonical namespace
 702                                         $t = $m[2];
 703                                         $this->mNamespace = $ns;
 704                                 } elseif ( $ns = $wgLang->getNsIndex( $lowerNs )) {
 705                                         # Ordinary namespace
 706                                         $t = $m[2];
 707                                         $this->mNamespace = $ns;
 708                                 } elseif ( $this->getInterwikiLink( $p ) ) {
 709                                         # Interwiki link
 710                                         $t = $m[2];
 711                                         $this->mInterwiki = $p;
 712
 713                                         if ( !preg_match( "/^([A-Za-z0-9_\\x80-\\xff]+):(.*)$/", $t, $m ) ) {
 714                                                 $done = true;
 715                                         } elseif($this->mInterwiki != $wgLocalInterwiki) {
 716                                                 $done = true;
 717                                         }
 718                                 }
 719                         }
 720                         $r = $t;
 721                 }
 722
 723                 # Redundant interwiki prefix to the local wiki
 724                 if ( 0 == strcmp( $this->mInterwiki, $wgLocalInterwiki ) ) {
 725                         $this->mInterwiki = '';
 726                 }
 727                 # We already know that some pages won't be in the database!
 728                 #
 729                 if ( '' != $this->mInterwiki || -1 == $this->mNamespace ) {
 730                         $this->mArticleID = 0;
 731                 }
 732                 $f = strstr( $r, '#' );
 733                 if ( false !== $f ) {
 734                         $this->mFragment = substr( $f, 1 );
 735                         $r = substr( $r, 0, strlen( $r ) - strlen( $f ) );
 736                 }
 737
 738                 # Reject illegal characters.
 739                 #
 740                 if( preg_match( $rxTc, $r ) ) {
 741                         wfProfileOut( $fname );
 742                         return false;
 743                 }
 744
 745                 # "." and ".." conflict with the directories of those namesa
 746                 if ( strpos( $r, '.' ) !== false &&
 747                      ( $r === '.' || $r === '..' ||
 748                        strpos( $r, './' ) === 0  ||
 749                        strpos( $r, '../' ) === 0 ||
 750                        strpos( $r, '/./' ) !== false ||
 751                        strpos( $r, '/../' ) !== false ) )
 752                 {
 753                         wfProfileOut( $fname );
 754                         return false;
 755                 }
 756
 757                 # Initial capital letter
 758                 if( $wgCapitalLinks && $this->mInterwiki == '') {
 759                         $t = $wgLang->ucfirst( $r );
 760                 } else {
 761                         $t = $r;
 762                 }
 763
 764                 # Fill fields
 765                 $this->mDbkeyform = $t;
 766                 $this->mUrlform = wfUrlencode( $t );
 767
 768                 $this->mTextform = str_replace( '_', ' ', $t );
 769
 770                 wfProfileOut( $fname );
 771                 return true;
 772         }
 773
 774         # Get a title object associated with the talk page of this article
 775         function getTalkPage() {
 776                 return Title::makeTitle( Namespace::getTalk( $this->getNamespace() ), $this->getDBkey() );
 777         }
 778
 779         # Get a title object associated with the subject page of this talk page
 780         function getSubjectPage() {
 781                 return Title::makeTitle( Namespace::getSubject( $this->getNamespace() ), $this->getDBkey() );
 782         }
 783
 784         # Get an array of Title objects linking to this title
 785         # Also stores the IDs in the link cache
 786         # $options may be FOR UPDATE
 787         function getLinksTo( $options = '' ) {
 788                 global $wgLinkCache;
 789                 $id = $this->getArticleID();
 790
 791                 if ( $options ) {
 792                         $db =& wfGetDB( DB_MASTER );
 793                 } else {
 794                         $db =& wfGetDB( DB_SLAVE );
 795                 }
 796                 $cur = $db->tableName( 'cur' );
 797                 $links = $db->tableName( 'links' );
 798
 799                 $sql = "SELECT cur_namespace,cur_title,cur_id FROM $cur,$links WHERE l_from=cur_id AND l_to={$id} $options";
 800                 $res = $db->query( $sql, "Title::getLinksTo" );
 801                 $retVal = array();
 802                 if ( $db->numRows( $res ) ) {
 803                         while ( $row = $db->fetchObject( $res ) ) {
 804                                 if ( $titleObj = Title::makeTitle( $row->cur_namespace, $row->cur_title ) ) {
 805                                         $wgLinkCache->addGoodLink( $row->cur_id, $titleObj->getPrefixedDBkey() );
 806                                         $retVal[] = $titleObj;
 807                                 }
 808                         }
 809                 }
 810                 $db->freeResult( $res );
 811                 return $retVal;
 812         }
 813
 814         # Get an array of Title objects linking to this non-existent title
 815         # Also stores the IDs in the link cache
 816         function getBrokenLinksTo( $options = '' ) {
 817                 global $wgLinkCache;
 818
 819                 if ( $options ) {
 820                         $db =& wfGetDB( DB_MASTER );
 821                 } else {
 822                         $db =& wfGetDB( DB_SLAVE );
 823                 }
 824                 $cur = $db->tableName( 'cur' );
 825                 $brokenlinks = $db->tableName( 'brokenlinks' );
 826                 $encTitle = $db->strencode( $this->getPrefixedDBkey() );
 827
 828                 $sql = "SELECT cur_namespace,cur_title,cur_id FROM $brokenlinks,$cur " .
 829                   "WHERE bl_from=cur_id AND bl_to='$encTitle' $options";
 830                 $res = $db->query( $sql, "Title::getBrokenLinksTo" );
 831                 $retVal = array();
 832                 if ( $db->numRows( $res ) ) {
 833                         while ( $row = $db->fetchObject( $res ) ) {
 834                                 $titleObj = Title::makeTitle( $row->cur_namespace, $row->cur_title );
 835                                 $wgLinkCache->addGoodLink( $row->cur_id, $titleObj->getPrefixedDBkey() );
 836                                 $retVal[] = $titleObj;
 837                         }
 838                 }
 839                 $db->freeResult( $res );
 840                 return $retVal;
 841         }
 842
 843         function getSquidURLs() {
 844                 return array(
 845                         $this->getInternalURL(),
 846                         $this->getInternalURL( 'action=history' )
 847                 );
 848         }
 849
 850         function moveNoAuth( &$nt ) {
 851                 return $this->moveTo( $nt, false );
 852         }
 853
 854         # Move a title to a new location
 855         # Returns true on success, message name on failure
 856         # auth indicates whether wgUser's permissions should be checked
 857         function moveTo( &$nt, $auth = true ) {
 858                 if( !$this or !$nt ) {
 859                         return 'badtitletext';
 860                 }
 861
 862                 $fname = 'Title::move';
 863                 $oldid = $this->getArticleID();
 864                 $newid = $nt->getArticleID();
 865
 866                 if ( strlen( $nt->getDBkey() ) < 1 ) {
 867                         return 'articleexists';
 868                 }
 869                 if ( ( ! Namespace::isMovable( $this->getNamespace() ) ) ||
 870                          ( '' == $this->getDBkey() ) ||
 871                          ( '' != $this->getInterwiki() ) ||
 872                          ( !$oldid ) ||
 873                      ( ! Namespace::isMovable( $nt->getNamespace() ) ) ||
 874                          ( '' == $nt->getDBkey() ) ||
 875                          ( '' != $nt->getInterwiki() ) ) {
 876                         return 'badarticleerror';
 877                 }
 878
 879                 if ( $auth && ( !$this->userCanEdit() || !$nt->userCanEdit() ) ) {
 880                         return 'protectedpage';
 881                 }
 882
 883                 # The move is allowed only if (1) the target doesn't exist, or
 884                 # (2) the target is a redirect to the source, and has no history
 885                 # (so we can undo bad moves right after they're done).
 886
 887                 if ( 0 != $newid ) { # Target exists; check for validity
 888                         if ( ! $this->isValidMoveTarget( $nt ) ) {
 889                                 return 'articleexists';
 890                         }
 891                         $this->moveOverExistingRedirect( $nt );
 892                 } else { # Target didn't exist, do normal move.
 893                         $this->moveToNewTitle( $nt, $newid );
 894                 }
 895
 896                 # Fixing category links (those without piped 'alternate' names) to be sorted under the new title
 897
 898                 $dbw =& wfGetDB( DB_MASTER );
 899                 $sql = "UPDATE categorylinks SET cl_sortkey=" . $dbw->addQuotes( $nt->getPrefixedText() ) .
 900                         " WHERE cl_from=" . $dbw->addQuotes( $this->getArticleID() ) .
 901                         " AND cl_sortkey=" . $dbw->addQuotes( $this->getPrefixedText() );
 902                 $dbw->query( $sql, "SpecialMovepage::doSubmit" );
 903
 904                 # Update watchlists
 905
 906                 $oldnamespace = $this->getNamespace() & ~1;
 907                 $newnamespace = $nt->getNamespace() & ~1;
 908                 $oldtitle = $this->getDBkey();
 909                 $newtitle = $nt->getDBkey();
 910
 911                 if( $oldnamespace != $newnamespace || $oldtitle != $newtitle ) {
 912                         WatchedItem::duplicateEntries( $this, $nt );
 913                 }
 914
 915                 # Update search engine
 916                 $u = new SearchUpdate( $oldid, $nt->getPrefixedDBkey() );
 917                 $u->doUpdate();
 918                 $u = new SearchUpdate( $newid, $this->getPrefixedDBkey(), "" );
 919                 $u->doUpdate();
 920
 921                 return true;
 922         }
 923
 924         # Move page to title which is presently a redirect to the source page
 925
 926         /* private */ function moveOverExistingRedirect( &$nt ) {
 927                 global $wgUser, $wgLinkCache, $wgUseSquid, $wgMwRedir;
 928                 $fname = 'Title::moveOverExistingRedirect';
 929                 $comment = wfMsg( "1movedto2", $this->getPrefixedText(), $nt->getPrefixedText() );
 930
 931         $now = wfTimestampNow();
 932         $won = wfInvertTimestamp( $now );
 933                 $newid = $nt->getArticleID();
 934                 $oldid = $this->getArticleID();
 935                 $dbw =& wfGetDB( DB_MASTER );
 936                 $links = $dbw->tableName( 'links' );
 937
 938                 # Change the name of the target page:
 939                 $dbw->updateArray( 'cur',
 940                         /* SET */ array(
 941                                 'cur_touched' => $now,
 942                                 'cur_namespace' => $nt->getNamespace(),
 943                                 'cur_title' => $nt->getDBkey()
 944                         ),
 945                         /* WHERE */ array( 'cur_id' => $oldid ),
 946                         $fname
 947                 );
 948                 $wgLinkCache->clearLink( $nt->getPrefixedDBkey() );
 949
 950                 # Repurpose the old redirect. We don't save it to history since
 951                 # by definition if we've got here it's rather uninteresting.
 952
 953                 $redirectText = $wgMwRedir->getSynonym( 0 ) . ' [[' . $nt->getPrefixedText() . "]]\n";
 954                 $dbw->updateArray( 'cur',
 955                         /* SET */ array(
 956                                 'cur_touched' => $now,
 957                                 'cur_timestamp' => $now,
 958                                 'inverse_timestamp' => $won,
 959                                 'cur_namespace' => $this->getNamespace(),
 960                                 'cur_title' => $this->getDBkey(),
 961                                 'cur_text' => $wgMwRedir->getSynonym( 0 ) . " [[" . $nt->getPrefixedText() . "]]\n",
 962                                 'cur_comment' => $comment,
 963                                 'cur_user' => $wgUser->getID(),
 964                                 'cur_minor_edit' => 0,
 965                                 'cur_counter' => 0,
 966                                 'cur_restrictions' => '',
 967                                 'cur_user_text' => $wgUser->getName(),
 968                                 'cur_is_redirect' => 1,
 969                                 'cur_is_new' => 1
 970                         ),
 971                         /* WHERE */ array( 'cur_id' => $newid ),
 972                         $fname
 973                 );
 974
 975                 $wgLinkCache->clearLink( $this->getPrefixedDBkey() );
 976
 977                 # Fix the redundant names for the past revisions of the target page.
 978                 # The redirect should have no old revisions.
 979                 $dbw->updateArray(
 980                         /* table */ 'old',
 981                         /* SET */ array(
 982                                 'old_namespace' => $nt->getNamespace(),
 983                                 'old_title' => $nt->getDBkey(),
 984                         ),
 985                         /* WHERE */ array(
 986                                 'old_namespace' => $this->getNamespace(),
 987                                 'old_title' => $this->getDBkey(),
 988                         ),
 989                         $fname
 990                 );
 991
 992                 RecentChange::notifyMoveOverRedirect( $now, $this, $nt, $wgUser, $comment );
 993
 994                 # Swap links
 995
 996                 # Load titles and IDs
 997                 $linksToOld = $this->getLinksTo( 'FOR UPDATE' );
 998                 $linksToNew = $nt->getLinksTo( 'FOR UPDATE' );
 999
1000                 # Delete them all
1001                 $sql = "DELETE FROM $links WHERE l_to=$oldid OR l_to=$newid";
1002                 $dbw->query( $sql, $fname );
1003
1004                 # Reinsert
1005                 if ( count( $linksToOld ) || count( $linksToNew )) {
1006                         $sql = "INSERT INTO $links (l_from,l_to) VALUES ";
1007                         $first = true;
1008
1009                         # Insert links to old title
1010                         foreach ( $linksToOld as $linkTitle ) {
1011                                 if ( $first ) {
1012                                         $first = false;
1013                                 } else {
1014                                         $sql .= ',';
1015                                 }
1016                                 $id = $linkTitle->getArticleID();
1017                                 $sql .= "($id,$newid)";
1018                         }
1019
1020                         # Insert links to new title
1021                         foreach ( $linksToNew as $linkTitle ) {
1022                                 if ( $first ) {
1023                                         $first = false;
1024                                 } else {
1025                                         $sql .= ',';
1026                                 }
1027                                 $id = $linkTitle->getArticleID();
1028                                 $sql .= "($id, $oldid)";
1029                         }
1030
1031                         $dbw->query( $sql, DB_MASTER, $fname );
1032                 }
1033
1034                 # Now, we record the link from the redirect to the new title.
1035                 # It should have no other outgoing links...
1036                 $dbw->delete( 'links', array( 'l_from' => $newid ) );
1037                 $dbw->insertArray( 'links', array( 'l_from' => $newid, 'l_to' => $oldid ) );
1038
1039                 # Clear linkscc
1040                 LinkCache::linksccClearLinksTo( $oldid );
1041                 LinkCache::linksccClearLinksTo( $newid );
1042
1043                 # Purge squid
1044                 if ( $wgUseSquid ) {
1045                         $urls = array_merge( $nt->getSquidURLs(), $this->getSquidURLs() );
1046                         $u = new SquidUpdate( $urls );
1047                         $u->doUpdate();
1048                 }
1049         }
1050
1051         # Move page to non-existing title.
1052         # Sets $newid to be the new article ID
1053
1054         /* private */ function moveToNewTitle( &$nt, &$newid ) {
1055                 global $wgUser, $wgLinkCache, $wgUseSquid;
1056                 $fname = 'MovePageForm::moveToNewTitle';
1057                 $comment = wfMsg( '1movedto2', $this->getPrefixedText(), $nt->getPrefixedText() );
1058
1059                 $now = wfTimestampNow();
1060                 $won = wfInvertTimestamp( $now );
1061                 $newid = $nt->getArticleID();
1062                 $oldid = $this->getArticleID();
1063                 $dbw =& wfGetDB( DB_MASTER );
1064
1065                 # Rename cur entry
1066                 $dbw->updateArray( 'cur',
1067                         /* SET */ array(
1068                                 'cur_touched' => $now,
1069                                 'cur_namespace' => $nt->getNamespace(),
1070                                 'cur_title' => $nt->getDBkey()
1071                         ),
1072                         /* WHERE */ array( 'cur_id' => $oldid ),
1073                         $fname
1074                 );
1075
1076                 $wgLinkCache->clearLink( $nt->getPrefixedDBkey() );
1077
1078                 # Insert redirct
1079                 $dbw->insertArray( 'cur', array(
1080                         'cur_namespace' => $this->getNamespace(),
1081                         'cur_title' => $this->getDBkey(),
1082                         'cur_comment' => $comment,
1083                         'cur_user' => $wgUser->getID(),
1084                         'cur_user_text' => $wgUser->getName(),
1085                         'cur_timestamp' => $now,
1086                         'inverse_timestamp' => $won,
1087                         'cur_touched' => $now,
1088                         'cur_is_redirect' => 1,
1089                         'cur_is_new' => 1,
1090                         'cur_text' => "#REDIRECT [[" . $nt->getPrefixedText() . "]]\n" ), $fname
1091                 );
1092                 $newid = $dbw->insertId();
1093                 $wgLinkCache->clearLink( $this->getPrefixedDBkey() );
1094
1095                 # Rename old entries
1096                 $dbw->updateArray(
1097                         /* table */ 'old',
1098                         /* SET */ array(
1099                                 'old_namespace' => $nt->getNamespace(),
1100                                 'old_title' => $nt->getDBkey()
1101                         ),
1102                         /* WHERE */ array(
1103                                 'old_namespace' => $this->getNamespace(),
1104                                 'old_title' => $this->getDBkey()
1105                         ), $fname
1106                 );
1107
1108                 # Record in RC
1109                 RecentChange::notifyMoveToNew( $now, $this, $nt, $wgUser, $comment );
1110
1111                 # Purge squid and linkscc as per article creation
1112                 Article::onArticleCreate( $nt );
1113
1114                 # Any text links to the old title must be reassigned to the redirect
1115                 $dbw->updateArray( 'links', array( 'l_to' => $newid ), array( 'l_to' => $oldid ), $fname );
1116                 LinkCache::linksccClearLinksTo( $oldid );
1117
1118                 # Record the just-created redirect's linking to the page
1119                 $dbw->insertArray( 'links', array( 'l_from' => $newid, 'l_to' => $oldid ), $fname );
1120
1121                 # Non-existent target may have had broken links to it; these must
1122                 # now be removed and made into good links.
1123                 $update = new LinksUpdate( $oldid, $nt->getPrefixedDBkey() );
1124                 $update->fixBrokenLinks();
1125
1126                 # Purge old title from squid
1127                 # The new title, and links to the new title, are purged in Article::onArticleCreate()
1128                 $titles = $nt->getLinksTo();
1129                 if ( $wgUseSquid ) {
1130                         $urls = $this->getSquidURLs();
1131                         foreach ( $titles as $linkTitle ) {
1132                                 $urls[] = $linkTitle->getInternalURL();
1133                         }
1134                         $u = new SquidUpdate( $urls );
1135                         $u->doUpdate();
1136                 }
1137         }
1138
1139         # Checks if $this can be moved to $nt
1140         # Selects for update, so don't call it unless you mean business
1141         function isValidMoveTarget( $nt ) {
1142                 $fname = 'Title::isValidMoveTarget';
1143                 $dbw =& wfGetDB( DB_MASTER );
1144
1145                 # Is it a redirect?
1146                 $id  = $nt->getArticleID();
1147                 $obj = $dbw->getArray( 'cur', array( 'cur_is_redirect','cur_text' ),
1148                         array( 'cur_id' => $id ), $fname, 'FOR UPDATE' );
1149
1150                 if ( !$obj || 0 == $obj->cur_is_redirect ) {
1151                         # Not a redirect
1152                         return false;
1153                 }
1154
1155                 # Does the redirect point to the source?
1156                 if ( preg_match( "/\\[\\[\\s*([^\\]\\|]*)]]/", $obj->cur_text, $m ) ) {
1157                         $redirTitle = Title::newFromText( $m[1] );
1158                         if( !is_object( $redirTitle ) ||
1159                                 $redirTitle->getPrefixedDBkey() != $this->getPrefixedDBkey() ) {
1160                                 return false;
1161                         }
1162                 }
1163
1164                 # Does the article have a history?
1165                 $row = $dbw->getArray( 'old', array( 'old_id' ),
1166                         array(
1167                                 'old_namespace' => $nt->getNamespace(),
1168                                 'old_title' => $nt->getDBkey()
1169                         ), $fname, 'FOR UPDATE'
1170                 );
1171
1172                 # Return true if there was no history
1173                 return $row === false;
1174         }
1175
1176         # Create a redirect, fails if the title already exists, does not notify RC
1177         # Returns success
1178         function createRedirect( $dest, $comment ) {
1179                 global $wgUser;
1180                 if ( $this->getArticleID() ) {
1181                         return false;
1182                 }
1183
1184                 $fname = "Title::createRedirect";
1185                 $dbw =& wfGetDB( DB_MASTER );
1186                 $now = wfTimestampNow();
1187                 $won = wfInvertTimestamp( $now );
1188                 $seqVal = $dbw->nextSequenceValue( 'cur_cur_id_seq' );
1189
1190                 $dbw->insertArray( 'cur', array(
1191                         'cur_id' => $seqVal,
1192                         'cur_namespace' => $this->getNamespace(),
1193                         'cur_title' => $this->getDBkey(),
1194                         'cur_comment' => $comment,
1195                         'cur_user' => $wgUser->getID(),
1196                         'cur_user_text' => $wgUser->getName(),
1197                         'cur_timestamp' => $now,
1198                         'inverse_timestamp' => $won,
1199                         'cur_touched' => $now,
1200                         'cur_is_redirect' => 1,
1201                         'cur_is_new' => 1,
1202                         'cur_text' => "#REDIRECT [[" . $dest->getPrefixedText() . "]]\n"
1203                 ), $fname );
1204                 $newid = $dbw->insertId();
1205                 $this->resetArticleID( $newid );
1206
1207                 # Link table
1208                 if ( $dest->getArticleID() ) {
1209                         $dbw->insertArray( 'links',
1210                                 array(
1211                                         'l_to' => $dest->getArticleID(),
1212                                         'l_from' => $newid
1213                                 ), $fname
1214                         );
1215                 } else {
1216                         $dbw->insertArray( 'brokenlinks',
1217                                 array(
1218                                         'bl_to' => $dest->getPrefixedDBkey(),
1219                                         'bl_from' => $newid
1220                                 ), $fname
1221                         );
1222                 }
1223
1224                 Article::onArticleCreate( $this );
1225                 return true;
1226         }
1227
1228         # Get categories to wich belong this title and return an array of
1229         # categories names.
1230         function getParentCategories( ) {
1231                 global $wgLang,$wgUser;
1232
1233                 $titlekey = $this->getArticleId();
1234                 $cns = Namespace::getCategory();
1235                 $sk =& $wgUser->getSkin();
1236                 $parents = array();
1237                 $dbr =& wfGetDB( DB_SLAVE );
1238                 $cur = $dbr->tableName( 'cur' );
1239                 $categorylinks = $dbr->tableName( 'categorylinks' );
1240
1241                 # get the parents categories of this title from the database
1242                 $sql = "SELECT DISTINCT cur_id FROM $cur,$categorylinks
1243                         WHERE cl_from='$titlekey' AND cl_to=cur_title AND cur_namespace='$cns'
1244                                 ORDER BY cl_sortkey" ;
1245                 $res = $dbr->query ( $sql ) ;
1246
1247                 if($dbr->numRows($res) > 0) {
1248                         while ( $x = $dbr->fetchObject ( $res ) ) $data[] = $x ;
1249                         $dbr->freeResult ( $res ) ;
1250                 } else {
1251                         $data = '';
1252                 }
1253                 return $data;
1254         }
1255
1256         # will get the parents and grand-parents
1257         # TODO : not sure what's happening when a loop happen like:
1258         #       Encyclopedia > Astronomy > Encyclopedia
1259         function getAllParentCategories(&$stack) {
1260                 global $wgUser,$wgLang;
1261                 $result = '';
1262
1263                 # getting parents
1264                 $parents = $this->getParentCategories( );
1265
1266                 if($parents == '')
1267                 {
1268                         # The current element has no more parent so we dump the stack
1269                         # and make a clean line of categories
1270                         $sk =& $wgUser->getSkin() ;
1271
1272                         foreach ( array_reverse($stack) as $child => $parent )
1273                         {
1274                                 # make a link of that parent
1275                                 $result .= $sk->makeLink($wgLang->getNSText ( Namespace::getCategory() ).":".$parent,$parent);
1276                                 $result .= ' &gt; ';
1277                                 $lastchild = $child;
1278                         }
1279                         # append the last child.
1280                         # TODO : We should have a last child unless there is an error in the
1281                         # "categorylinks" table.
1282                         if(isset($lastchild)) { $result .= $lastchild; }
1283
1284                         $result .= "<br/>\n";
1285
1286                         # now we can empty the stack
1287                         $stack = array();
1288
1289                 } else {
1290                         # look at parents of current category
1291                         foreach($parents as $parent)
1292                         {
1293                                 # create a title object for the parent
1294                                 $tpar = Title::newFromID($parent->cur_id);
1295                                 # add it to the stack
1296                                 $stack[$this->getText()] = $tpar->getText();
1297                                 # grab its parents
1298                                 $result .= $tpar->getAllParentCategories($stack);
1299                         }
1300                 }
1301
1302                 if(isset($result)) { return $result; }
1303                 else { return ''; };
1304         }
1305
1306         # Returns an associative array for selecting this title from cur
1307         function curCond() {
1308                 return array( 'cur_namespace' => $this->mNamespace, 'cur_title' => $this->mDbkeyform );
1309         }
1310
1311         function oldCond() {
1312                 return array( 'old_namespace' => $this->mNamespace, 'old_title' => $this->mDbkeyform );
1313         }
1314 }
1315 ?>