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