includes/Title.php

   1 <?php
   2 # See title.doc
   3
   4 $wgTitleInterwikiCache = array();
   5
   6 # Title class
   7 #
   8 # * Represents a title, which may contain an interwiki designation or namespace
   9 # * Can fetch various kinds of data from the database, albeit inefficiently.
  10 #
  11 class Title {
  12         # All member variables should be considered private
  13         # Please use the accessor functions
  14
  15         var $mTextform;           # Text form (spaces not underscores) of the main part
  16         var $mUrlform;            # URL-encoded form of the main part
  17         var $mDbkeyform;          # Main part with underscores
  18         var $mNamespace;          # Namespace index, i.e. one of the NS_xxxx constants
  19         var $mInterwiki;          # Interwiki prefix (or null string)
  20         var $mFragment;           # Title fragment (i.e. the bit after the #)
  21         var $mArticleID;          # Article ID, fetched from the link cache on demand
  22         var $mRestrictions;       # Array of groups allowed to edit this article
  23                               # Only null or "sysop" are supported
  24         var $mRestrictionsLoaded; # Boolean for initialisation on demand
  25         var $mPrefixedText;       # Text form including namespace/interwiki, initialised on demand
  26         var $mDefaultNamespace;   # Namespace index when there is no namespace
  27                               # Zero except in {{transclusion}} tags
  28
  29 #----------------------------------------------------------------------------
  30 #   Construction
  31 #----------------------------------------------------------------------------
  32
  33         /* private */ function Title()
  34         {
  35                 $this->mInterwiki = $this->mUrlform =
  36                 $this->mTextform = $this->mDbkeyform = "";
  37                 $this->mArticleID = -1;
  38                 $this->mNamespace = 0;
  39                 $this->mRestrictionsLoaded = false;
  40                 $this->mRestrictions = array();
  41         $this->mDefaultNamespace = 0;
  42         }
  43
  44         # From a prefixed DB key
  45         /* static */ function newFromDBkey( $key )
  46         {
  47                 $t = new Title();
  48                 $t->mDbkeyform = $key;
  49                 if( $t->secureAndSplit() )
  50                         return $t;
  51                 else
  52                         return NULL;
  53         }
  54
  55         # From text, such as what you would find in a link
  56         /* static */ function newFromText( $text, $defaultNamespace = 0 )
  57         {
  58                 $fname = "Title::newFromText";
  59                 wfProfileIn( $fname );
  60
  61                 if( is_object( $text ) ) {
  62                         wfDebugDieBacktrace( "Called with object instead of string." );
  63                 }
  64                 global $wgInputEncoding;
  65                 $text = do_html_entity_decode( $text, ENT_COMPAT, $wgInputEncoding );
  66
  67                 $text = wfMungeToUtf8( $text );
  68
  69
  70                 # What was this for? TS 2004-03-03
  71                 # $text = urldecode( $text );
  72
  73                 $t = new Title();
  74                 $t->mDbkeyform = str_replace( " ", "_", $text );
  75                 $t->mDefaultNamespace = $defaultNamespace;
  76
  77                 wfProfileOut( $fname );
  78                 if ( !is_object( $t ) ) {
  79                         var_dump( debug_backtrace() );
  80                 }
  81                 if( $t->secureAndSplit() ) {
  82                         return $t;
  83                 } else {
  84                         return NULL;
  85                 }
  86         }
  87
  88         # From a URL-encoded title
  89         /* static */ function newFromURL( $url )
  90         {
  91                 global $wgLang, $wgServer;
  92                 $t = new Title();
  93
  94                 # For compatibility with old buggy URLs. "+" is not valid in titles,
  95                 # but some URLs used it as a space replacement and they still come
  96                 # from some external search tools.
  97                 $s = str_replace( "+", " ", $url );
  98
  99                 # For links that came from outside, check for alternate/legacy
 100                 # character encoding.
 101                 wfDebug( "Servr: $wgServer\n" );
 102                 if( empty( $_SERVER["HTTP_REFERER"] ) ||
 103                         strncmp($wgServer, $_SERVER["HTTP_REFERER"], strlen( $wgServer ) ) )
 104                 {
 105                         $s = $wgLang->checkTitleEncoding( $s );
 106                 } else {
 107                         wfDebug( "Refer: {$_SERVER['HTTP_REFERER']}\n" );
 108                 }
 109
 110                 $t->mDbkeyform = str_replace( " ", "_", $s );
 111                 if( $t->secureAndSplit() ) {
 112                         # check that length of title is < cur_title size
 113                         $dbr =& wfGetDB( DB_SLAVE );
 114                         $maxSize = $dbr->textFieldSize( 'cur', 'cur_title' );
 115                         if ( $maxSize != -1 && strlen( $t->mDbkeyform ) > $maxSize ) {
 116                                 return NULL;
 117                         }
 118
 119                         return $t;
 120                 } else {
 121                         return NULL;
 122                 }
 123         }
 124
 125         # From a cur_id
 126         # This is inefficiently implemented, the cur row is requested but not
 127         # used for anything else
 128         /* static */ function newFromID( $id )
 129         {
 130                 $fname = "Title::newFromID";
 131                 $dbr =& wfGetDB( DB_SLAVE );
 132                 $row = $dbr->getArray( "cur", array( "cur_namespace", "cur_title" ),
 133                         array( "cur_id" => $id ), $fname );
 134                 if ( $row !== false ) {
 135                         $title = Title::makeTitle( $row->cur_namespace, $row->cur_title );
 136                 } else {
 137                         $title = NULL;
 138                 }
 139                 return $title;
 140         }
 141
 142         # From a namespace index and a DB key
 143         /* static */ function makeTitle( $ns, $title )
 144         {
 145                 $t = new Title();
 146                 $t->mDbkeyform = Title::makeName( $ns, $title );
 147                 if( $t->secureAndSplit() ) {
 148                         return $t;
 149                 } else {
 150                         return NULL;
 151                 }
 152         }
 153
 154         function newMainPage()
 155         {
 156                 return Title::newFromText( wfMsg( "mainpage" ) );
 157         }
 158
 159 #----------------------------------------------------------------------------
 160 #       Static functions
 161 #----------------------------------------------------------------------------
 162
 163         # Get the prefixed DB key associated with an ID
 164         /* static */ function nameOf( $id )
 165         {
 166                 $fname = 'Title::nameOf';
 167                 $dbr =& wfGetDB( DB_SLAVE );
 168
 169                 $s = $dbr->getArray( 'cur', array( 'cur_namespace','cur_title' ),  array( 'cur_id' => $id ), $fname );
 170                 if ( $s === false ) { return NULL; }
 171
 172                 $n = Title::makeName( $s->cur_namespace, $s->cur_title );
 173                 return $n;
 174         }
 175
 176         # Get a regex character class describing the legal characters in a link
 177         /* static */ function legalChars()
 178         {
 179                 # Missing characters:
 180                 #  * []|# Needed for link syntax
 181                 #  * % and + are corrupted by Apache when they appear in the path
 182                 #
 183                 # % seems to work though
 184                 #
 185                 # The problem with % is that URLs are double-unescaped: once by Apache's
 186                 # path conversion code, and again by PHP. So %253F, for example, becomes "?".
 187                 # Our code does not double-escape to compensate for this, indeed double escaping
 188                 # would break if the double-escaped title was passed in the query string
 189                 # rather than the path. This is a minor security issue because articles can be
 190                 # created such that they are hard to view or edit. -- TS
 191                 #
 192                 # Theoretically 0x80-0x9F of ISO 8859-1 should be disallowed, but
 193                 # this breaks interlanguage links
 194
 195                 $set = " %!\"$&'()*,\\-.\\/0-9:;=?@A-Z\\\\^_`a-z{}~\\x80-\\xFF";
 196                 return $set;
 197         }
 198
 199         # Returns a stripped-down a title string ready for the search index
 200         # Takes a namespace index and a text-form main part
 201         /* static */ function indexTitle( $ns, $title )
 202         {
 203                 global $wgDBminWordLen, $wgLang;
 204
 205                 $lc = SearchEngine::legalSearchChars() . "&#;";
 206                 $t = $wgLang->stripForSearch( $title );
 207                 $t = preg_replace( "/[^{$lc}]+/", " ", $t );
 208                 $t = strtolower( $t );
 209
 210                 # Handle 's, s'
 211                 $t = preg_replace( "/([{$lc}]+)'s( |$)/", "\\1 \\1's ", $t );
 212                 $t = preg_replace( "/([{$lc}]+)s'( |$)/", "\\1s ", $t );
 213
 214                 $t = preg_replace( "/\\s+/", " ", $t );
 215
 216                 if ( $ns == Namespace::getImage() ) {
 217                         $t = preg_replace( "/ (png|gif|jpg|jpeg|ogg)$/", "", $t );
 218                 }
 219                 return trim( $t );
 220         }
 221
 222         # Make a prefixed DB key from a DB key and a namespace index
 223         /* static */ function makeName( $ns, $title )
 224         {
 225                 global $wgLang;
 226
 227                 $n = $wgLang->getNsText( $ns );
 228                 if ( "" == $n ) { return $title; }
 229                 else { return "{$n}:{$title}"; }
 230         }
 231
 232         # Arguably static
 233         # Returns the URL associated with an interwiki prefix
 234         # The URL contains $1, which is replaced by the title
 235         function getInterwikiLink( $key )
 236         {
 237                 global $wgMemc, $wgDBname, $wgInterwikiExpiry, $wgTitleInterwikiCache;
 238                 $fname = 'Title::getInterwikiLink';
 239                 $k = "$wgDBname:interwiki:$key";
 240
 241                 if( array_key_exists( $k, $wgTitleInterwikiCache ) )
 242                         return $wgTitleInterwikiCache[$k]->iw_url;
 243
 244                 $s = $wgMemc->get( $k );
 245                 # Ignore old keys with no iw_local
 246                 if( $s && isset( $s->iw_local ) ) {
 247                         $wgTitleInterwikiCache[$k] = $s;
 248                         return $s->iw_url;
 249                 }
 250                 $dbr =& wfGetDB( DB_SLAVE );
 251                 $res = $dbr->select( 'interwiki', array( 'iw_url', 'iw_local' ), array( 'iw_prefix' => $key ), $fname );
 252                 if(!$res) return "";
 253
 254                 $s = $dbr->fetchObject( $res );
 255                 if(!$s) {
 256                         # Cache non-existence: create a blank object and save it to memcached
 257                         $s = (object)false;
 258                         $s->iw_url = "";
 259                         $s->iw_local = 0;
 260                 }
 261                 $wgMemc->set( $k, $s, $wgInterwikiExpiry );
 262                 $wgTitleInterwikiCache[$k] = $s;
 263                 return $s->iw_url;
 264         }
 265
 266         function isLocal() {
 267                 global $wgTitleInterwikiCache, $wgDBname;
 268
 269                 if ( $this->mInterwiki != "" ) {
 270                         # Make sure key is loaded into cache
 271                         $this->getInterwikiLink( $this->mInterwiki );
 272                         $k = "$wgDBname:interwiki:" . $this->mInterwiki;
 273                         return (bool)($wgTitleInterwikiCache[$k]->iw_local);
 274                 } else {
 275                         return true;
 276                 }
 277         }
 278
 279         # Update the cur_touched field for an array of title objects
 280         # Inefficient unless the IDs are already loaded into the link cache
 281         /* static */ function touchArray( $titles, $timestamp = "" ) {
 282                 if ( count( $titles ) == 0 ) {
 283                         return;
 284                 }
 285                 if ( $timestamp == "" ) {
 286                         $timestamp = wfTimestampNow();
 287                 }
 288                 $dbw =& wfGetDB( DB_MASTER );
 289                 $cur = $dbw->tableName( 'cur' );
 290                 $sql = "UPDATE $cur SET cur_touched='{$timestamp}' WHERE cur_id IN (";
 291                 $first = true;
 292
 293                 foreach ( $titles as $title ) {
 294                         if ( ! $first ) {
 295                                 $sql .= ",";
 296                         }
 297                         $first = false;
 298                         $sql .= $title->getArticleID();
 299                 }
 300                 $sql .= ")";
 301                 if ( ! $first ) {
 302                         $dbw->query( $sql, "Title::touchArray" );
 303                 }
 304         }
 305
 306 #----------------------------------------------------------------------------
 307 #       Other stuff
 308 #----------------------------------------------------------------------------
 309
 310         # Simple accessors
 311         # See the definitions at the top of this file
 312
 313         function getText() { return $this->mTextform; }
 314         function getPartialURL() { return $this->mUrlform; }
 315         function getDBkey() { return $this->mDbkeyform; }
 316         function getNamespace() { return $this->mNamespace; }
 317         function setNamespace( $n ) { $this->mNamespace = $n; }
 318         function getInterwiki() { return $this->mInterwiki; }
 319         function getFragment() { return $this->mFragment; }
 320         function getDefaultNamespace() { return $this->mDefaultNamespace; }
 321
 322         # Get title for search index
 323         function getIndexTitle()
 324         {
 325                 return Title::indexTitle( $this->mNamespace, $this->mTextform );
 326         }
 327
 328         # Get prefixed title with underscores
 329         function getPrefixedDBkey()
 330         {
 331                 $s = $this->prefix( $this->mDbkeyform );
 332                 $s = str_replace( " ", "_", $s );
 333                 return $s;
 334         }
 335
 336         # Get prefixed title with spaces
 337         # This is the form usually used for display
 338         function getPrefixedText()
 339         {
 340                 if ( empty( $this->mPrefixedText ) ) {
 341                         $s = $this->prefix( $this->mTextform );
 342                         $s = str_replace( "_", " ", $s );
 343                         $this->mPrefixedText = $s;
 344                 }
 345                 return $this->mPrefixedText;
 346         }
 347
 348         # As getPrefixedText(), plus fragment.
 349         function getFullText() {
 350                 $text = $this->getPrefixedText();
 351                 if( '' != $this->mFragment ) {
 352                         $text .= '#' . $this->mFragment;
 353                 }
 354                 return $text;
 355         }
 356
 357         # Get a URL-encoded title (not an actual URL) including interwiki
 358         function getPrefixedURL()
 359         {
 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         {
 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         {
 410                 global $wgLang, $wgArticlePath, $wgScript;
 411
 412                 if ( $this->isExternal() ) {
 413                         return $this->getFullURL();
 414                 }
 415
 416                 $dbkey = wfUrlencode( $this->getPrefixedDBkey() );
 417                 if ( $query == "" ) {
 418                         $url = str_replace( "$1", $dbkey, $wgArticlePath );
 419                 } else {
 420                         if ( $query == "-" ) {
 421                                 $query = "";
 422                         }
 423                         if ( $wgScript != "" ) {
 424                                 $url = "{$wgScript}?title={$dbkey}&{$query}";
 425                         } else {
 426                                 # Top level wiki
 427                                 $url = "/{$dbkey}?{$query}";
 428                         }
 429                 }
 430                 return $url;
 431         }
 432
 433         function escapeLocalURL( $query = "" ) {
 434                 return wfEscapeHTML( $this->getLocalURL( $query ) );
 435         }
 436
 437         function escapeFullURL( $query = "" ) {
 438                 return wfEscapeHTML( $this->getFullURL( $query ) );
 439         }
 440
 441         function getInternalURL( $query = "" ) {
 442                 # Used in various Squid-related code, in case we have a different
 443                 # internal hostname for the server than the exposed one.
 444                 global $wgInternalServer;
 445                 return $wgInternalServer . $this->getLocalURL( $query );
 446         }
 447
 448         # Get the edit URL, or a null string if it is an interwiki link
 449         function getEditURL()
 450         {
 451                 global $wgServer, $wgScript;
 452
 453                 if ( "" != $this->mInterwiki ) { return ""; }
 454                 $s = $this->getLocalURL( "action=edit" );
 455
 456                 return $s;
 457         }
 458
 459         # Get HTML-escaped displayable text
 460         # For the title field in <a> tags
 461         function getEscapedText()
 462         {
 463                 return wfEscapeHTML( $this->getPrefixedText() );
 464         }
 465
 466         # Is the title interwiki?
 467         function isExternal() { return ( "" != $this->mInterwiki ); }
 468
 469         # Does the title correspond to a protected article?
 470         function isProtected()
 471         {
 472                 if ( -1 == $this->mNamespace ) { return true; }
 473                 $a = $this->getRestrictions();
 474                 if ( in_array( "sysop", $a ) ) { return true; }
 475                 return false;
 476         }
 477
 478         # Is the page a log page, i.e. one where the history is messed up by
 479         # LogPage.php? This used to be used for suppressing diff links in recent
 480         # changes, but now that's done by setting a flag in the recentchanges
 481         # table. Hence, this probably is no longer used.
 482         function isLog()
 483         {
 484                 if ( $this->mNamespace != Namespace::getWikipedia() ) {
 485                         return false;
 486                 }
 487                 if ( ( 0 == strcmp( wfMsg( "uploadlogpage" ), $this->mDbkeyform ) ) ||
 488                   ( 0 == strcmp( wfMsg( "dellogpage" ), $this->mDbkeyform ) ) ) {
 489                         return true;
 490                 }
 491                 return false;
 492         }
 493
 494         # Is $wgUser is watching this page?
 495         function userIsWatching()
 496         {
 497                 global $wgUser;
 498
 499                 if ( -1 == $this->mNamespace ) { return false; }
 500                 if ( 0 == $wgUser->getID() ) { return false; }
 501
 502                 return $wgUser->isWatched( $this );
 503         }
 504
 505         # Can $wgUser edit this page?
 506         function userCanEdit()
 507         {
 508                 global $wgUser;
 509                 if ( -1 == $this->mNamespace ) { return false; }
 510                 if ( NS_MEDIAWIKI == $this->mNamespace && !$wgUser->isSysop() ) { return false; }
 511                 # if ( 0 == $this->getArticleID() ) { return false; }
 512                 if ( $this->mDbkeyform == "_" ) { return false; }
 513                 # protect global styles and js
 514                 if ( NS_MEDIAWIKI == $this->mNamespace
 515                      && preg_match("/\\.(css|js)$/", $this->mTextform )
 516                      && !$wgUser->isSysop() )
 517                 { return false; }
 518                 //if ( $this->isCssJsSubpage() and !$this->userCanEditCssJsSubpage() ) { return false; }
 519                 # protect css/js subpages of user pages
 520                 # XXX: this might be better using restrictions
 521                 # XXX: Find a way to work around the php bug that prevents using $this->userCanEditCssJsSubpage() from working
 522                 if( Namespace::getUser() == $this->mNamespace
 523                         and preg_match("/\\.(css|js)$/", $this->mTextform )
 524                         and !$wgUser->isSysop()
 525                         and !preg_match("/^".preg_quote($wgUser->getName(), '/')."/", $this->mTextform) )
 526                 { return false; }
 527                 $ur = $wgUser->getRights();
 528                 foreach ( $this->getRestrictions() as $r ) {
 529                         if ( "" != $r && ( ! in_array( $r, $ur ) ) ) {
 530                                 return false;
 531                         }
 532                 }
 533                 return true;
 534         }
 535
 536         function userCanRead() {
 537                 global $wgUser;
 538                 global $wgWhitelistRead;
 539
 540                 if( 0 != $wgUser->getID() ) return true;
 541                 if( !is_array( $wgWhitelistRead ) ) return true;
 542
 543                 $name = $this->getPrefixedText();
 544                 if( in_array( $name, $wgWhitelistRead ) ) return true;
 545
 546                 # Compatibility with old settings
 547                 if( $this->getNamespace() == NS_MAIN ) {
 548                         if( in_array( ":" . $name, $wgWhitelistRead ) ) return true;
 549                 }
 550                 return false;
 551         }
 552
 553         function isCssJsSubpage() {
 554                 return ( Namespace::getUser() == $this->mNamespace and preg_match("/\\.(css|js)$/", $this->mTextform ) );
 555         }
 556         function isCssSubpage() {
 557                 return ( Namespace::getUser() == $this->mNamespace and preg_match("/\\.css$/", $this->mTextform ) );
 558         }
 559         function isJsSubpage() {
 560                 return ( Namespace::getUser() == $this->mNamespace and preg_match("/\\.js$/", $this->mTextform ) );
 561         }
 562         function userCanEditCssJsSubpage() {
 563                 # protect css/js subpages of user pages
 564                 # XXX: this might be better using restrictions
 565                 global $wgUser;
 566                 return ( $wgUser->isSysop() or preg_match("/^".preg_quote($wgUser->getName())."/", $this->mTextform) );
 567         }
 568
 569         # Accessor/initialisation for mRestrictions
 570         function getRestrictions()
 571         {
 572                 $id = $this->getArticleID();
 573                 if ( 0 == $id ) { return array(); }
 574
 575                 if ( ! $this->mRestrictionsLoaded ) {
 576                         $dbr =& wfGetDB( DB_SLAVE );
 577                         $res = $dbr->getField( "cur", "cur_restrictions", "cur_id=$id" );
 578                         $this->mRestrictions = explode( ",", trim( $res ) );
 579                         $this->mRestrictionsLoaded = true;
 580                 }
 581                 return $this->mRestrictions;
 582         }
 583
 584         # Is there a version of this page in the deletion archive?
 585         # Returns the number of archived revisions
 586         function isDeleted() {
 587                 $fname = 'Title::isDeleted';
 588                 $dbr =& wfGetDB( DB_SLAVE );
 589                 $n = $dbr->getField( 'archive', 'COUNT(*)', array( 'ar_namespace' => $this->getNamespace(),
 590                         'ar_title' => $this->getDBkey() ), $fname );
 591                 return (int)$n;
 592         }
 593
 594         # Get the article ID from the link cache
 595         # Used very heavily, e.g. in Parser::replaceInternalLinks()
 596         function getArticleID()
 597         {
 598                 global $wgLinkCache;
 599
 600                 if ( -1 != $this->mArticleID ) { return $this->mArticleID; }
 601                 $this->mArticleID = $wgLinkCache->addLinkObj( $this );
 602                 return $this->mArticleID;
 603         }
 604
 605         # This clears some fields in this object, and clears any associated keys in the
 606         # "bad links" section of $wgLinkCache. This is called from Article::insertNewArticle()
 607         # to allow loading of the new cur_id. It's also called from Article::doDeleteArticle()
 608         function resetArticleID( $newid )
 609         {
 610                 global $wgLinkCache;
 611                 $wgLinkCache->clearBadLink( $this->getPrefixedDBkey() );
 612
 613                 if ( 0 == $newid ) { $this->mArticleID = -1; }
 614                 else { $this->mArticleID = $newid; }
 615                 $this->mRestrictionsLoaded = false;
 616                 $this->mRestrictions = array();
 617         }
 618
 619         # Updates cur_touched
 620         # Called from LinksUpdate.php
 621         function invalidateCache() {
 622                 $now = wfTimestampNow();
 623                 $dbw =& wfGetDB( DB_MASTER );
 624                 $success = $dbw->updateArray( 'cur',
 625                         array( /* SET */
 626                                 'cur_touched' => wfTimestampNow()
 627                         ), array( /* WHERE */
 628                                 'cur_namespace' => $this->getNamespace() ,
 629                                 'cur_title' => $this->getDBkey()
 630                         ), 'Title::invalidateCache'
 631                 );
 632                 return $success;
 633         }
 634
 635         # Prefixes some arbitrary text with the namespace or interwiki prefix of this object
 636         /* private */ function prefix( $name )
 637         {
 638                 global $wgLang;
 639
 640                 $p = "";
 641                 if ( "" != $this->mInterwiki ) {
 642                         $p = $this->mInterwiki . ":";
 643                 }
 644                 if ( 0 != $this->mNamespace ) {
 645                         $p .= $wgLang->getNsText( $this->mNamespace ) . ":";
 646                 }
 647                 return $p . $name;
 648         }
 649
 650         # Secure and split - main initialisation function for this object
 651         #
 652         # Assumes that mDbkeyform has been set, and is urldecoded
 653     # and uses underscores, but not otherwise munged.  This function
 654     # removes illegal characters, splits off the interwiki and
 655     # namespace prefixes, sets the other forms, and canonicalizes
 656     # everything.
 657         #
 658         /* private */ function secureAndSplit()
 659         {
 660                 global $wgLang, $wgLocalInterwiki, $wgCapitalLinks;
 661                 $fname = "Title::secureAndSplit";
 662                 wfProfileIn( $fname );
 663
 664                 static $imgpre = false;
 665                 static $rxTc = false;
 666
 667                 # Initialisation
 668                 if ( $imgpre === false ) {
 669                         $imgpre = ":" . $wgLang->getNsText( Namespace::getImage() ) . ":";
 670                         # % is needed as well
 671                         $rxTc = "/[^" . Title::legalChars() . "]/";
 672                 }
 673
 674                 $this->mInterwiki = $this->mFragment = "";
 675                 $this->mNamespace = $this->mDefaultNamespace; # Usually NS_MAIN
 676
 677                 # Clean up whitespace
 678                 #
 679                 $t = preg_replace( "/[\\s_]+/", "_", $this->mDbkeyform );
 680                 $t = preg_replace( '/^_*(.*?)_*$/', '$1', $t );
 681
 682                 if ( "" == $t ) {
 683                         wfProfileOut( $fname );
 684                         return false;
 685                 }
 686
 687                 $this->mDbkeyform = $t;
 688                 $done = false;
 689
 690                 # :Image: namespace
 691                 if ( 0 == strncasecmp( $imgpre, $t, strlen( $imgpre ) ) ) {
 692                         $t = substr( $t, 1 );
 693                 }
 694
 695                 # Initial colon indicating main namespace
 696                 if ( ":" == $t{0} ) {
 697                         $r = substr( $t, 1 );
 698                         $this->mNamespace = NS_MAIN;
 699                 } else {
 700                         # Namespace or interwiki prefix
 701                         if ( preg_match( "/^(.+?)_*:_*(.*)$/", $t, $m ) ) {
 702                                 #$p = strtolower( $m[1] );
 703                                 $p = $m[1];
 704                                 $lowerNs = strtolower( $p );
 705                                 if ( $ns = Namespace::getCanonicalIndex( $lowerNs ) ) {
 706                                         # Canonical namespace
 707                                         $t = $m[2];
 708                                         $this->mNamespace = $ns;
 709                                 } elseif ( $ns = $wgLang->getNsIndex( $lowerNs )) {
 710                                         # Ordinary namespace
 711                                         $t = $m[2];
 712                                         $this->mNamespace = $ns;
 713                                 } elseif ( $this->getInterwikiLink( $p ) ) {
 714                                         # Interwiki link
 715                                         $t = $m[2];
 716                                         $this->mInterwiki = $p;
 717
 718                                         if ( !preg_match( "/^([A-Za-z0-9_\\x80-\\xff]+):(.*)$/", $t, $m ) ) {
 719                                                 $done = true;
 720                                         } elseif($this->mInterwiki != $wgLocalInterwiki) {
 721                                                 $done = true;
 722                                         }
 723                                 }
 724                         }
 725                         $r = $t;
 726                 }
 727
 728                 # Redundant interwiki prefix to the local wiki
 729                 if ( 0 == strcmp( $this->mInterwiki, $wgLocalInterwiki ) ) {
 730                         $this->mInterwiki = "";
 731                 }
 732                 # We already know that some pages won't be in the database!
 733                 #
 734                 if ( "" != $this->mInterwiki || -1 == $this->mNamespace ) {
 735                         $this->mArticleID = 0;
 736                 }
 737                 $f = strstr( $r, "#" );
 738                 if ( false !== $f ) {
 739                         $this->mFragment = substr( $f, 1 );
 740                         $r = substr( $r, 0, strlen( $r ) - strlen( $f ) );
 741                 }
 742
 743                 # Reject illegal characters.
 744                 #
 745                 if( preg_match( $rxTc, $r ) ) {
 746                         wfProfileOut( $fname );
 747                         return false;
 748                 }
 749
 750                 # "." and ".." conflict with the directories of those namesa
 751                 if ( strpos( $r, "." ) !== false &&
 752                      ( $r === "." || $r === ".." ||
 753                        strpos( $r, "./" ) === 0  ||
 754                        strpos( $r, "../" ) === 0 ||
 755                        strpos( $r, "/./" ) !== false ||
 756                        strpos( $r, "/../" ) !== false ) )
 757                 {
 758                         wfProfileOut( $fname );
 759                         return false;
 760                 }
 761
 762                 # Initial capital letter
 763                 if( $wgCapitalLinks && $this->mInterwiki == "") {
 764                         $t = $wgLang->ucfirst( $r );
 765                 } else {
 766                         $t = $r;
 767                 }
 768
 769                 # Fill fields
 770                 $this->mDbkeyform = $t;
 771                 $this->mUrlform = wfUrlencode( $t );
 772
 773                 $this->mTextform = str_replace( "_", " ", $t );
 774
 775                 wfProfileOut( $fname );
 776                 return true;
 777         }
 778
 779         # Get a title object associated with the talk page of this article
 780         function getTalkPage() {
 781                 return Title::makeTitle( Namespace::getTalk( $this->getNamespace() ), $this->getDBkey() );
 782         }
 783
 784         # Get a title object associated with the subject page of this talk page
 785         function getSubjectPage() {
 786                 return Title::makeTitle( Namespace::getSubject( $this->getNamespace() ), $this->getDBkey() );
 787         }
 788
 789         # Get an array of Title objects linking to this title
 790         # Also stores the IDs in the link cache
 791         # $options may be FOR UPDATE
 792         function getLinksTo( $options = '' ) {
 793                 global $wgLinkCache;
 794                 $id = $this->getArticleID();
 795
 796                 if ( $options ) {
 797                         $db =& wfGetDB( DB_MASTER );
 798                 } else {
 799                         $db =& wfGetDB( DB_SLAVE );
 800                 }
 801                 $cur = $db->tableName( 'cur' );
 802                 $links = $db->tableName( 'links' );
 803
 804                 $sql = "SELECT cur_namespace,cur_title,cur_id FROM $cur,$links WHERE l_from=cur_id AND l_to={$id} $options";
 805                 $res = $db->query( $sql, "Title::getLinksTo" );
 806                 $retVal = array();
 807                 if ( $db->numRows( $res ) ) {
 808                         while ( $row = $db->fetchObject( $res ) ) {
 809                                 if ( $titleObj = Title::makeTitle( $row->cur_namespace, $row->cur_title ) ) {
 810                                         $wgLinkCache->addGoodLink( $row->cur_id, $titleObj->getPrefixedDBkey() );
 811                                         $retVal[] = $titleObj;
 812                                 }
 813                         }
 814                 }
 815                 $db->freeResult( $res );
 816                 return $retVal;
 817         }
 818
 819         # Get an array of Title objects linking to this non-existent title
 820         # Also stores the IDs in the link cache
 821         function getBrokenLinksTo( $options = '' ) {
 822                 global $wgLinkCache;
 823
 824                 if ( $options ) {
 825                         $db =& wfGetDB( DB_MASTER );
 826                 } else {
 827                         $db =& wfGetDB( DB_SLAVE );
 828                 }
 829                 $cur = $db->tableName( 'cur' );
 830                 $brokenlinks = $db->tableName( 'brokenlinks' );
 831                 $encTitle = $db->strencode( $this->getPrefixedDBkey() );
 832
 833                 $sql = "SELECT cur_namespace,cur_title,cur_id FROM $brokenlinks,$cur " .
 834                   "WHERE bl_from=cur_id AND bl_to='$encTitle' $options";
 835                 $res = $db->query( $sql, "Title::getBrokenLinksTo" );
 836                 $retVal = array();
 837                 if ( $db->numRows( $res ) ) {
 838                         while ( $row = $db->fetchObject( $res ) ) {
 839                                 $titleObj = Title::makeTitle( $row->cur_namespace, $row->cur_title );
 840                                 $wgLinkCache->addGoodLink( $row->cur_id, $titleObj->getPrefixedDBkey() );
 841                                 $retVal[] = $titleObj;
 842                         }
 843                 }
 844                 $db->freeResult( $res );
 845                 return $retVal;
 846         }
 847
 848         function getSquidURLs() {
 849                 return array(
 850                         $this->getInternalURL(),
 851                         $this->getInternalURL( "action=history" )
 852                 );
 853         }
 854
 855         function moveNoAuth( &$nt ) {
 856                 return $this->moveTo( $nt, false );
 857         }
 858
 859         # Move a title to a new location
 860         # Returns true on success, message name on failure
 861         # auth indicates whether wgUser's permissions should be checked
 862         function moveTo( &$nt, $auth = true ) {
 863                 if( !$this or !$nt ) {
 864                         return "badtitletext";
 865                 }
 866
 867                 $fname = "Title::move";
 868                 $oldid = $this->getArticleID();
 869                 $newid = $nt->getArticleID();
 870
 871                 if ( strlen( $nt->getDBkey() ) < 1 ) {
 872                         return "articleexists";
 873                 }
 874                 if ( ( ! Namespace::isMovable( $this->getNamespace() ) ) ||
 875                          ( "" == $this->getDBkey() ) ||
 876                          ( "" != $this->getInterwiki() ) ||
 877                          ( !$oldid ) ||
 878                      ( ! Namespace::isMovable( $nt->getNamespace() ) ) ||
 879                          ( "" == $nt->getDBkey() ) ||
 880                          ( "" != $nt->getInterwiki() ) ) {
 881                         return "badarticleerror";
 882                 }
 883
 884                 if ( $auth && ( !$this->userCanEdit() || !$nt->userCanEdit() ) ) {
 885                         return "protectedpage";
 886                 }
 887
 888                 # The move is allowed only if (1) the target doesn't exist, or
 889                 # (2) the target is a redirect to the source, and has no history
 890                 # (so we can undo bad moves right after they're done).
 891
 892                 if ( 0 != $newid ) { # Target exists; check for validity
 893                         if ( ! $this->isValidMoveTarget( $nt ) ) {
 894                                 return "articleexists";
 895                         }
 896                         $this->moveOverExistingRedirect( $nt );
 897                 } else { # Target didn't exist, do normal move.
 898                         $this->moveToNewTitle( $nt, $newid );
 899                 }
 900
 901
 902                 # Fixing category links (those without piped 'alternate' names) to be sorted under the new title
 903
 904                 $dbw =& wfGetDB( DB_MASTER );
 905                 $sql = "UPDATE categorylinks SET cl_sortkey=" . $dbw->addQuotes( $nt->getPrefixedText() ) .
 906                         " WHERE cl_from=" . $dbw->addQuotes( $this->getArticleID() ) .
 907                         " AND cl_sortkey=" . $dbw->addQuotes( $this->getPrefixedText() );
 908                 $dbw->query( $sql, "SpecialMovepage::doSubmit" );
 909
 910
 911                 # Update watchlists
 912
 913                 $oldnamespace = $this->getNamespace() & ~1;
 914                 $newnamespace = $nt->getNamespace() & ~1;
 915                 $oldtitle = $this->getDBkey();
 916                 $newtitle = $nt->getDBkey();
 917
 918                 if( $oldnamespace != $newnamespace && $oldtitle != $newtitle ) {
 919                         WatchedItem::duplicateEntries( $this, $nt );
 920                 }
 921
 922                 # Update search engine
 923                 $u = new SearchUpdate( $oldid, $nt->getPrefixedDBkey() );
 924                 $u->doUpdate();
 925                 $u = new SearchUpdate( $newid, $this->getPrefixedDBkey(), "" );
 926                 $u->doUpdate();
 927
 928                 return true;
 929         }
 930
 931         # Move page to title which is presently a redirect to the source page
 932
 933         /* private */ function moveOverExistingRedirect( &$nt )
 934         {
 935                 global $wgUser, $wgLinkCache, $wgUseSquid, $wgMwRedir;
 936                 $fname = "Title::moveOverExistingRedirect";
 937                 $comment = wfMsg( "1movedto2", $this->getPrefixedText(), $nt->getPrefixedText() );
 938
 939         $now = wfTimestampNow();
 940         $won = wfInvertTimestamp( $now );
 941                 $newid = $nt->getArticleID();
 942                 $oldid = $this->getArticleID();
 943                 $dbw =& wfGetDB( DB_MASTER );
 944                 $links = $dbw->tableName( 'links' );
 945
 946                 # Change the name of the target page:
 947                 $dbw->updateArray( 'cur',
 948                         /* SET */ array(
 949                                 'cur_touched' => $now,
 950                                 'cur_namespace' => $nt->getNamespace(),
 951                                 'cur_title' => $nt->getDBkey()
 952                         ),
 953                         /* WHERE */ array( 'cur_id' => $oldid ),
 954                         $fname
 955                 );
 956                 $wgLinkCache->clearLink( $nt->getPrefixedDBkey() );
 957
 958                 # Repurpose the old redirect. We don't save it to history since
 959                 # by definition if we've got here it's rather uninteresting.
 960
 961                 $redirectText = $wgMwRedir->getSynonym( 0 ) . " [[" . $nt->getPrefixedText() . "]]\n";
 962                 $dbw->updateArray( 'cur',
 963                         /* SET */ array(
 964                                 'cur_touched' => $now,
 965                                 'cur_timestamp' => $now,
 966                                 'inverse_timestamp' => $won,
 967                                 'cur_namespace' => $this->getNamespace(),
 968                                 'cur_title' => $this->getDBkey(),
 969                                 'cur_text' => $wgMwRedir->getSynonym( 0 ) . " [[" . $nt->getPrefixedText() . "]]\n",
 970                                 'cur_comment' => $comment,
 971                                 'cur_user' => $wgUser->getID(),
 972                                 'cur_minor_edit' => 0,
 973                                 'cur_counter' => 0,
 974                                 'cur_restrictions' => '',
 975                                 'cur_user_text' => $wgUser->getName(),
 976                                 'cur_is_redirect' => 1,
 977                                 'cur_is_new' => 1
 978                         ),
 979                         /* WHERE */ array( 'cur_id' => $newid ),
 980                         $fname
 981                 );
 982
 983                 $wgLinkCache->clearLink( $this->getPrefixedDBkey() );
 984
 985                 # Fix the redundant names for the past revisions of the target page.
 986                 # The redirect should have no old revisions.
 987                 $dbw->updateArray(
 988                         /* table */ 'old',
 989                         /* SET */ array(
 990                                 'old_namespace' => $nt->getNamespace(),
 991                                 'old_title' => $nt->getDBkey(),
 992                         ),
 993                         /* WHERE */ array(
 994                                 'old_namespace' => $this->getNamespace(),
 995                                 'old_title' => $this->getDBkey(),
 996                         ),
 997                         $fname
 998                 );
 999
1000                 RecentChange::notifyMoveOverRedirect( $now, $this, $nt, $wgUser, $comment );
1001
1002                 # Swap links
1003
1004                 # Load titles and IDs
1005                 $linksToOld = $this->getLinksTo( 'FOR UPDATE' );
1006                 $linksToNew = $nt->getLinksTo( 'FOR UPDATE' );
1007
1008                 # Delete them all
1009                 $sql = "DELETE FROM $links WHERE l_to=$oldid OR l_to=$newid";
1010                 $dbw->query( $sql, $fname );
1011
1012                 # Reinsert
1013                 if ( count( $linksToOld ) || count( $linksToNew )) {
1014                         $sql = "INSERT INTO $links (l_from,l_to) VALUES ";
1015                         $first = true;
1016
1017                         # Insert links to old title
1018                         foreach ( $linksToOld as $linkTitle ) {
1019                                 if ( $first ) {
1020                                         $first = false;
1021                                 } else {
1022                                         $sql .= ",";
1023                                 }
1024                                 $id = $linkTitle->getArticleID();
1025                                 $sql .= "($id,$newid)";
1026                         }
1027
1028                         # Insert links to new title
1029                         foreach ( $linksToNew as $linkTitle ) {
1030                                 if ( $first ) {
1031                                         $first = false;
1032                                 } else {
1033                                         $sql .= ",";
1034                                 }
1035                                 $id = $linkTitle->getArticleID();
1036                                 $sql .= "($id, $oldid)";
1037                         }
1038
1039                         $dbw->query( $sql, DB_MASTER, $fname );
1040                 }
1041
1042                 # Now, we record the link from the redirect to the new title.
1043                 # It should have no other outgoing links...
1044                 $dbw->delete( 'links', array( 'l_from' => $newid ) );
1045                 $dbw->insertArray( 'links', array( 'l_from' => $newid, 'l_to' => $oldid ) );
1046
1047                 # Clear linkscc
1048                 LinkCache::linksccClearLinksTo( $oldid );
1049                 LinkCache::linksccClearLinksTo( $newid );
1050
1051                 # Purge squid
1052                 if ( $wgUseSquid ) {
1053                         $urls = array_merge( $nt->getSquidURLs(), $this->getSquidURLs() );
1054                         $u = new SquidUpdate( $urls );
1055                         $u->doUpdate();
1056                 }
1057         }
1058
1059         # Move page to non-existing title.
1060         # Sets $newid to be the new article ID
1061
1062         /* private */ function moveToNewTitle( &$nt, &$newid )
1063         {
1064                 global $wgUser, $wgLinkCache, $wgUseSquid;
1065                 $fname = "MovePageForm::moveToNewTitle";
1066                 $comment = wfMsg( "1movedto2", $this->getPrefixedText(), $nt->getPrefixedText() );
1067
1068                 $now = wfTimestampNow();
1069                 $won = wfInvertTimestamp( $now );
1070                 $newid = $nt->getArticleID();
1071                 $oldid = $this->getArticleID();
1072                 $dbw =& wfGetDB( DB_MASTER );
1073
1074                 # Rename cur entry
1075                 $dbw->updateArray( 'cur',
1076                         /* SET */ array(
1077                                 'cur_touched' => $now,
1078                                 'cur_namespace' => $nt->getNamespace(),
1079                                 'cur_title' => $nt->getDBkey()
1080                         ),
1081                         /* WHERE */ array( 'cur_id' => $oldid ),
1082                         $fname
1083                 );
1084
1085                 $wgLinkCache->clearLink( $nt->getPrefixedDBkey() );
1086
1087                 # Insert redirct
1088                 $dbw->insertArray( 'cur', array(
1089                         'cur_namespace' => $this->getNamespace(),
1090                         'cur_title' => $this->getDBkey(),
1091                         'cur_comment' => $comment,
1092                         'cur_user' => $wgUser->getID(),
1093                         'cur_user_text' => $wgUser->getName(),
1094                         'cur_timestamp' => $now,
1095                         'inverse_timestamp' => $won,
1096                         'cur_touched' => $now,
1097                         'cur_is_redirect' => 1,
1098                         'cur_is_new' => 1,
1099                         'cur_text' => "#REDIRECT [[" . $nt->getPrefixedText() . "]]\n" ), $fname
1100                 );
1101                 $newid = $dbw->insertId();
1102                 $wgLinkCache->clearLink( $this->getPrefixedDBkey() );
1103
1104                 # Rename old entries
1105                 $dbw->updateArray(
1106                         /* table */ 'old',
1107                         /* SET */ array(
1108                                 'old_namespace' => $nt->getNamespace(),
1109                                 'old_title' => $nt->getDBkey()
1110                         ),
1111                         /* WHERE */ array(
1112                                 'old_namespace' => $this->getNamespace(),
1113                                 'old_title' => $this->getDBkey()
1114                         ), $fname
1115                 );
1116
1117                 # Record in RC
1118                 RecentChange::notifyMoveToNew( $now, $this, $nt, $wgUser, $comment );
1119
1120                 # Purge squid and linkscc as per article creation
1121                 Article::onArticleCreate( $nt );
1122
1123                 # Any text links to the old title must be reassigned to the redirect
1124                 $dbw->updateArray( 'links', array( 'l_to' => $newid ), array( 'l_to' => $oldid ), $fname );
1125                 LinkCache::linksccClearLinksTo( $oldid );
1126
1127                 # Record the just-created redirect's linking to the page
1128                 $dbw->insertArray( 'links', array( 'l_from' => $newid, 'l_to' => $oldid ), $fname );
1129
1130                 # Non-existent target may have had broken links to it; these must
1131                 # now be removed and made into good links.
1132                 $update = new LinksUpdate( $oldid, $nt->getPrefixedDBkey() );
1133                 $update->fixBrokenLinks();
1134
1135                 # Purge old title from squid
1136                 # The new title, and links to the new title, are purged in Article::onArticleCreate()
1137                 $titles = $nt->getLinksTo();
1138                 if ( $wgUseSquid ) {
1139                         $urls = $this->getSquidURLs();
1140                         foreach ( $titles as $linkTitle ) {
1141                                 $urls[] = $linkTitle->getInternalURL();
1142                         }
1143                         $u = new SquidUpdate( $urls );
1144                         $u->doUpdate();
1145                 }
1146         }
1147
1148         # Checks if $this can be moved to $nt
1149         # Selects for update, so don't call it unless you mean business
1150         function isValidMoveTarget( $nt )
1151         {
1152                 $fname = "Title::isValidMoveTarget";
1153                 $dbw =& wfGetDB( DB_MASTER );
1154
1155                 # Is it a redirect?
1156                 $id  = $nt->getArticleID();
1157                 $obj = $dbw->getArray( 'cur', array( 'cur_is_redirect','cur_text' ),
1158                         array( 'cur_id' => $id ), $fname, 'FOR UPDATE' );
1159
1160                 if ( !$obj || 0 == $obj->cur_is_redirect ) {
1161                         # Not a redirect
1162                         return false;
1163                 }
1164
1165                 # Does the redirect point to the source?
1166                 if ( preg_match( "/\\[\\[\\s*([^\\]]*)]]/", $obj->cur_text, $m ) ) {
1167                         $redirTitle = Title::newFromText( $m[1] );
1168                         if ( 0 != strcmp( $redirTitle->getPrefixedDBkey(), $this->getPrefixedDBkey() ) ) {
1169                                 return false;
1170                         }
1171                 }
1172
1173                 # Does the article have a history?
1174                 $row = $dbw->getArray( 'old', array( 'old_id' ),
1175                         array(
1176                                 'old_namespace' => $nt->getNamespace(),
1177                                 'old_title' => $nt->getDBkey()
1178                         ), $fname, 'FOR UPDATE'
1179                 );
1180
1181                 # Return true if there was no history
1182                 return $row === false;
1183         }
1184
1185         # Create a redirect, fails if the title already exists, does not notify RC
1186         # Returns success
1187         function createRedirect( $dest, $comment ) {
1188                 global $wgUser;
1189                 if ( $this->getArticleID() ) {
1190                         return false;
1191                 }
1192
1193                 $fname = "Title::createRedirect";
1194                 $dbw =& wfGetDB( DB_MASTER );
1195                 $now = wfTimestampNow();
1196                 $won = wfInvertTimestamp( $now );
1197                 $seqVal = $dbw->nextSequenceValue( 'cur_cur_id_seq' );
1198
1199                 $dbw->insertArray( 'cur', array(
1200                         'cur_id' => $seqVal,
1201                         'cur_namespace' => $this->getNamespace(),
1202                         'cur_title' => $this->getDBkey(),
1203                         'cur_comment' => $comment,
1204                         'cur_user' => $wgUser->getID(),
1205                         'cur_user_text' => $wgUser->getName(),
1206                         'cur_timestamp' => $now,
1207                         'inverse_timestamp' => $won,
1208                         'cur_touched' => $now,
1209                         'cur_is_redirect' => 1,
1210                         'cur_is_new' => 1,
1211                         'cur_text' => "#REDIRECT [[" . $dest->getPrefixedText() . "]]\n"
1212                 ), $fname );
1213                 $newid = $dbw->insertId();
1214                 $this->resetArticleID( $newid );
1215
1216                 # Link table
1217                 if ( $dest->getArticleID() ) {
1218                         $dbw->insertArray( 'links',
1219                                 array(
1220                                         'l_to' => $dest->getArticleID(),
1221                                         'l_from' => $newid
1222                                 ), $fname
1223                         );
1224                 } else {
1225                         $dbw->insertArray( 'brokenlinks',
1226                                 array(
1227                                         'bl_to' => $dest->getPrefixedDBkey(),
1228                                         'bl_from' => $newid
1229                                 ), $fname
1230                         );
1231                 }
1232
1233                 Article::onArticleCreate( $this );
1234                 return true;
1235         }
1236
1237         # Get categories to wich belong this title and return an array of
1238         # categories names.
1239         function getParentCategories( )
1240         {
1241                 global $wgLang,$wgUser;
1242
1243                 $titlekey = $this->getArticleId();
1244                 $cns = Namespace::getCategory();
1245                 $sk =& $wgUser->getSkin();
1246                 $parents = array();
1247                 $dbr =& wfGetDB( DB_SLAVE );
1248                 $cur = $dbr->tableName( 'cur' );
1249                 $categorylinks = $dbr->tableName( 'categorylinks' );
1250
1251                 # get the parents categories of this title from the database
1252                 $sql = "SELECT DISTINCT cur_id FROM $cur,$categorylinks
1253                         WHERE cl_from='$titlekey' AND cl_to=cur_title AND cur_namespace='$cns'
1254                                 ORDER BY cl_sortkey" ;
1255                 $res = $dbr->query ( $sql ) ;
1256
1257                 if($dbr->numRows($res) > 0) {
1258                         while ( $x = $dbr->fetchObject ( $res ) ) $data[] = $x ;
1259                         $dbr->freeResult ( $res ) ;
1260                 } else {
1261                         $data = '';
1262                 }
1263                 return $data;
1264         }
1265
1266         # will get the parents and grand-parents
1267         # TODO : not sure what's happening when a loop happen like:
1268         #       Encyclopedia > Astronomy > Encyclopedia
1269         function getAllParentCategories(&$stack)
1270         {
1271                 global $wgUser,$wgLang;
1272                 $result = '';
1273
1274                 # getting parents
1275                 $parents = $this->getParentCategories( );
1276
1277                 if($parents == '')
1278                 {
1279                         # The current element has no more parent so we dump the stack
1280                         # and make a clean line of categories
1281                         $sk =& $wgUser->getSkin() ;
1282
1283                         foreach ( array_reverse($stack) as $child => $parent )
1284                         {
1285                                 # make a link of that parent
1286                                 $result .= $sk->makeLink($wgLang->getNSText ( Namespace::getCategory() ).":".$parent,$parent);
1287                                 $result .= ' &gt; ';
1288                                 $lastchild = $child;
1289                         }
1290                         # append the last child.
1291                         # TODO : We should have a last child unless there is an error in the
1292                         # "categorylinks" table.
1293                         if(isset($lastchild)) { $result .= $lastchild; }
1294
1295                         $result .= "<br/>\n";
1296
1297                         # now we can empty the stack
1298                         $stack = array();
1299
1300                 } else {
1301                         # look at parents of current category
1302                         foreach($parents as $parent)
1303                         {
1304                                 # create a title object for the parent
1305                                 $tpar = Title::newFromID($parent->cur_id);
1306                                 # add it to the stack
1307                                 $stack[$this->getText()] = $tpar->getText();
1308                                 # grab its parents
1309                                 $result .= $tpar->getAllParentCategories($stack);
1310                         }
1311                 }
1312
1313                 if(isset($result)) { return $result; }
1314                 else { return ''; };
1315         }
1316
1317         # Returns an associative array for selecting this title from cur
1318         function curCond() {
1319                 return array( 'cur_namespace' => $this->mNamespace, 'cur_title' => $this->mDbkeyform );
1320         }
1321
1322         function oldCond() {
1323                 return array( 'old_namespace' => $this->mNamespace, 'old_title' => $this->mDbkeyform );
1324         }
1325 }
1326 ?>