includes/Title.php

   1 <?php
   2 /**
   3  * See title.doc
   4  *
   5  */
   6
   7 /**
   8  *
   9  */
  10 $wgTitleInterwikiCache = array();
  11 define ( 'GAID_FOR_UPDATE', 1 );
  12
  13 /**
  14  * Title class
  15  * - Represents a title, which may contain an interwiki designation or namespace
  16  * - Can fetch various kinds of data from the database, albeit inefficiently.
  17  *
  18  * @todo migrate comments to phpdoc format
  19 */
  20 class Title {
  21         # All member variables should be considered private
  22         # Please use the accessor functions
  23
  24         var $mTextform;           # Text form (spaces not underscores) of the main part
  25         var $mUrlform;            # URL-encoded form of the main part
  26         var $mDbkeyform;          # Main part with underscores
  27         var $mNamespace;          # Namespace index, i.e. one of the NS_xxxx constants
  28         var $mInterwiki;          # Interwiki prefix (or null string)
  29         var $mFragment;           # Title fragment (i.e. the bit after the #)
  30         var $mArticleID;          # Article ID, fetched from the link cache on demand
  31         var $mRestrictions;       # Array of groups allowed to edit this article
  32                               # Only null or "sysop" are supported
  33         var $mRestrictionsLoaded; # Boolean for initialisation on demand
  34         var $mPrefixedText;       # Text form including namespace/interwiki, initialised on demand
  35         var $mDefaultNamespace;   # Namespace index when there is no namespace
  36                               # Zero except in {{transclusion}} tags
  37
  38 #----------------------------------------------------------------------------
  39 #   Construction
  40 #----------------------------------------------------------------------------
  41
  42         /* private */ function Title() {
  43                 $this->mInterwiki = $this->mUrlform =
  44                 $this->mTextform = $this->mDbkeyform = '';
  45                 $this->mArticleID = -1;
  46                 $this->mNamespace = 0;
  47                 $this->mRestrictionsLoaded = false;
  48                 $this->mRestrictions = array();
  49         $this->mDefaultNamespace = 0;
  50         }
  51
  52         # From a prefixed DB key
  53         /* static */ function newFromDBkey( $key ) {
  54                 $t = new Title();
  55                 $t->mDbkeyform = $key;
  56                 if( $t->secureAndSplit() )
  57                         return $t;
  58                 else
  59                         return NULL;
  60         }
  61
  62         # From text, such as what you would find in a link
  63         /* static */ function newFromText( $text, $defaultNamespace = 0 ) {
  64                 $fname = 'Title::newFromText';
  65                 wfProfileIn( $fname );
  66
  67                 if( is_object( $text ) ) {
  68                         wfDebugDieBacktrace( 'Called with object instead of string.' );
  69                 }
  70                 global $wgInputEncoding;
  71                 $text = do_html_entity_decode( $text, ENT_COMPAT, $wgInputEncoding );
  72
  73                 $text = wfMungeToUtf8( $text );
  74
  75
  76                 # What was this for? TS 2004-03-03
  77                 # $text = urldecode( $text );
  78
  79                 $t = new Title();
  80                 $t->mDbkeyform = str_replace( ' ', '_', $text );
  81                 $t->mDefaultNamespace = $defaultNamespace;
  82
  83                 wfProfileOut( $fname );
  84                 if ( !is_object( $t ) ) {
  85                         var_dump( debug_backtrace() );
  86                 }
  87                 if( $t->secureAndSplit() ) {
  88                         return $t;
  89                 } else {
  90                         return NULL;
  91                 }
  92         }
  93
  94         # From a URL-encoded title
  95         /* static */ function newFromURL( $url ) {
  96                 global $wgLang, $wgServer;
  97                 $t = new Title();
  98
  99                 # For compatibility with old buggy URLs. "+" is not valid in titles,
 100                 # but some URLs used it as a space replacement and they still come
 101                 # from some external search tools.
 102                 $s = str_replace( '+', ' ', $url );
 103
 104                 # For links that came from outside, check for alternate/legacy
 105                 # character encoding.
 106                 wfDebug( "Servr: $wgServer\n" );
 107                 if( empty( $_SERVER['HTTP_REFERER'] ) ||
 108                         strncmp($wgServer, $_SERVER['HTTP_REFERER'], strlen( $wgServer ) ) )
 109                 {
 110                         $s = $wgLang->checkTitleEncoding( $s );
 111                 } else {
 112                         wfDebug( "Refer: {$_SERVER['HTTP_REFERER']}\n" );
 113                 }
 114
 115                 $t->mDbkeyform = str_replace( ' ', '_', $s );
 116                 if( $t->secureAndSplit() ) {
 117                         # check that length of title is < cur_title size
 118                         $dbr =& wfGetDB( DB_SLAVE );
 119                         $maxSize = $dbr->textFieldSize( 'cur', 'cur_title' );
 120                         if ( $maxSize != -1 && strlen( $t->mDbkeyform ) > $maxSize ) {
 121                                 return NULL;
 122                         }
 123
 124                         return $t;
 125                 } else {
 126                         return NULL;
 127                 }
 128         }
 129
 130         # From a cur_id
 131         # This is inefficiently implemented, the cur row is requested but not
 132         # used for anything else
 133         /* static */ function newFromID( $id ) {
 134                 $fname = 'Title::newFromID';
 135                 $dbr =& wfGetDB( DB_SLAVE );
 136                 $row = $dbr->getArray( 'cur', array( 'cur_namespace', 'cur_title' ),
 137                         array( 'cur_id' => $id ), $fname );
 138                 if ( $row !== false ) {
 139                         $title = Title::makeTitle( $row->cur_namespace, $row->cur_title );
 140                 } else {
 141                         $title = NULL;
 142                 }
 143                 return $title;
 144         }
 145
 146         # From a namespace index and a DB key.
 147         # It's assumed that $ns and $title are *valid*, for instance when
 148         # they came directly from the database or a special page name.
 149         /* static */ function &makeTitle( $ns, $title ) {
 150                 $t =& new Title();
 151                 $t->mInterwiki = '';
 152                 $t->mFragment = '';
 153                 $t->mNamespace = $ns;
 154                 $t->mDbkeyform = $title;
 155                 $t->mArticleID = ( $ns >= 0 ) ? 0 : -1;
 156                 $t->mUrlform = wfUrlencode( $title );
 157                 $t->mTextform = str_replace( '_', ' ', $title );
 158                 return $t;
 159         }
 160
 161         # From a namespace index and a DB key.
 162         # These will be checked for validity, which is a bit slower
 163         # than makeTitle() but safer for user-provided data.
 164         /* static */ function makeTitleSafe( $ns, $title ) {
 165                 $t = new Title();
 166                 $t->mDbkeyform = Title::makeName( $ns, $title );
 167                 if( $t->secureAndSplit() ) {
 168                         return $t;
 169                 } else {
 170                         return NULL;
 171                 }
 172         }
 173
 174         /* static */ function newMainPage() {
 175                 return Title::newFromText( wfMsg( 'mainpage' ) );
 176         }
 177
 178         # Get the title object for a redirect
 179         # Returns NULL if the text is not a valid redirect
 180         /* static */ function newFromRedirect( $text ) {
 181                 global $wgMwRedir;
 182                 $rt = NULL;
 183                 if ( $wgMwRedir->matchStart( $text ) ) {
 184                         if ( preg_match( '/\\[\\[([^\\]\\|]+)[\\]\\|]/', $text, $m ) ) {
 185                                 # categories are escaped using : for example one can enter:
 186                                 # #REDIRECT [[:Category:Music]]. Need to remove it.
 187                                 if ( substr($m[1],0,1) == ':') {
 188                                         # We don't want to keep the ':'
 189                                         $m[1] = substr( $m[1], 1 );
 190                                 }
 191
 192                                 $rt = Title::newFromText( $m[1] );
 193                         }
 194                 }
 195                 return $rt;
 196         }
 197
 198 #----------------------------------------------------------------------------
 199 #       Static functions
 200 #----------------------------------------------------------------------------
 201
 202         # Get the prefixed DB key associated with an ID
 203         /* static */ function nameOf( $id ) {
 204                 $fname = 'Title::nameOf';
 205                 $dbr =& wfGetDB( DB_SLAVE );
 206
 207                 $s = $dbr->getArray( 'cur', array( 'cur_namespace','cur_title' ),  array( 'cur_id' => $id ), $fname );
 208                 if ( $s === false ) { return NULL; }
 209
 210                 $n = Title::makeName( $s->cur_namespace, $s->cur_title );
 211                 return $n;
 212         }
 213
 214         # Get a regex character class describing the legal characters in a link
 215         /* static */ function legalChars() {
 216                 # Missing characters:
 217                 #  * []|# Needed for link syntax
 218                 #  * % and + are corrupted by Apache when they appear in the path
 219                 #
 220                 # % seems to work though
 221                 #
 222                 # The problem with % is that URLs are double-unescaped: once by Apache's
 223                 # path conversion code, and again by PHP. So %253F, for example, becomes "?".
 224                 # Our code does not double-escape to compensate for this, indeed double escaping
 225                 # would break if the double-escaped title was passed in the query string
 226                 # rather than the path. This is a minor security issue because articles can be
 227                 # created such that they are hard to view or edit. -- TS
 228                 #
 229                 # Theoretically 0x80-0x9F of ISO 8859-1 should be disallowed, but
 230                 # this breaks interlanguage links
 231
 232                 $set = " %!\"$&'()*,\\-.\\/0-9:;=?@A-Z\\\\^_`a-z{}~\\x80-\\xFF";
 233                 return $set;
 234         }
 235
 236         # Returns a stripped-down a title string ready for the search index
 237         # Takes a namespace index and a text-form main part
 238         /* static */ function indexTitle( $ns, $title ) {
 239                 global $wgDBminWordLen, $wgLang;
 240                 require_once( 'SearchEngine.php' );
 241
 242                 $lc = SearchEngine::legalSearchChars() . '&#;';
 243                 $t = $wgLang->stripForSearch( $title );
 244                 $t = preg_replace( "/[^{$lc}]+/", ' ', $t );
 245                 $t = strtolower( $t );
 246
 247                 # Handle 's, s'
 248                 $t = preg_replace( "/([{$lc}]+)'s( |$)/", "\\1 \\1's ", $t );
 249                 $t = preg_replace( "/([{$lc}]+)s'( |$)/", "\\1s ", $t );
 250
 251                 $t = preg_replace( "/\\s+/", ' ', $t );
 252
 253                 if ( $ns == Namespace::getImage() ) {
 254                         $t = preg_replace( "/ (png|gif|jpg|jpeg|ogg)$/", "", $t );
 255                 }
 256                 return trim( $t );
 257         }
 258
 259         # Make a prefixed DB key from a DB key and a namespace index
 260         /* static */ function makeName( $ns, $title ) {
 261                 global $wgLang;
 262
 263                 $n = $wgLang->getNsText( $ns );
 264                 if ( '' == $n ) { return $title; }
 265                 else { return $n.':'.$title; }
 266         }
 267
 268         # Arguably static
 269         # Returns the URL associated with an interwiki prefix
 270         # The URL contains $1, which is replaced by the title
 271         function getInterwikiLink( $key ) {
 272                 global $wgMemc, $wgDBname, $wgInterwikiExpiry, $wgTitleInterwikiCache;
 273                 $fname = 'Title::getInterwikiLink';
 274                 $k = $wgDBname.':interwiki:'.$key;
 275
 276                 if( array_key_exists( $k, $wgTitleInterwikiCache ) )
 277                         return $wgTitleInterwikiCache[$k]->iw_url;
 278
 279                 $s = $wgMemc->get( $k );
 280                 # Ignore old keys with no iw_local
 281                 if( $s && isset( $s->iw_local ) ) {
 282                         $wgTitleInterwikiCache[$k] = $s;
 283                         return $s->iw_url;
 284                 }
 285                 $dbr =& wfGetDB( DB_SLAVE );
 286                 $res = $dbr->select( 'interwiki', array( 'iw_url', 'iw_local' ), array( 'iw_prefix' => $key ), $fname );
 287                 if(!$res) return '';
 288
 289                 $s = $dbr->fetchObject( $res );
 290                 if(!$s) {
 291                         # Cache non-existence: create a blank object and save it to memcached
 292                         $s = (object)false;
 293                         $s->iw_url = '';
 294                         $s->iw_local = 0;
 295                 }
 296                 $wgMemc->set( $k, $s, $wgInterwikiExpiry );
 297                 $wgTitleInterwikiCache[$k] = $s;
 298                 return $s->iw_url;
 299         }
 300
 301         function isLocal() {
 302                 global $wgTitleInterwikiCache, $wgDBname;
 303
 304                 if ( $this->mInterwiki != '' ) {
 305                         # Make sure key is loaded into cache
 306                         $this->getInterwikiLink( $this->mInterwiki );
 307                         $k = $wgDBname.':interwiki:' . $this->mInterwiki;
 308                         return (bool)($wgTitleInterwikiCache[$k]->iw_local);
 309                 } else {
 310                         return true;
 311                 }
 312         }
 313
 314         # Update the cur_touched field for an array of title objects
 315         # Inefficient unless the IDs are already loaded into the link cache
 316         /* static */ function touchArray( $titles, $timestamp = '' ) {
 317                 if ( count( $titles ) == 0 ) {
 318                         return;
 319                 }
 320                 if ( $timestamp == '' ) {
 321                         $timestamp = wfTimestampNow();
 322                 }
 323                 $dbw =& wfGetDB( DB_MASTER );
 324                 $cur = $dbw->tableName( 'cur' );
 325                 $sql = "UPDATE $cur SET cur_touched='{$timestamp}' WHERE cur_id IN (";
 326                 $first = true;
 327
 328                 foreach ( $titles as $title ) {
 329                         if ( ! $first ) {
 330                                 $sql .= ',';
 331                         }
 332                         $first = false;
 333                         $sql .= $title->getArticleID();
 334                 }
 335                 $sql .= ')';
 336                 if ( ! $first ) {
 337                         $dbw->query( $sql, 'Title::touchArray' );
 338                 }
 339         }
 340
 341 #----------------------------------------------------------------------------
 342 #       Other stuff
 343 #----------------------------------------------------------------------------
 344
 345         # Simple accessors
 346         # See the definitions at the top of this file
 347
 348         function getText() { return $this->mTextform; }
 349         function getPartialURL() { return $this->mUrlform; }
 350         function getDBkey() { return $this->mDbkeyform; }
 351         function getNamespace() { return $this->mNamespace; }
 352         function setNamespace( $n ) { $this->mNamespace = $n; }
 353         function getInterwiki() { return $this->mInterwiki; }
 354         function getFragment() { return $this->mFragment; }
 355         function getDefaultNamespace() { return $this->mDefaultNamespace; }
 356
 357         # Get title for search index
 358         function getIndexTitle() {
 359                 return Title::indexTitle( $this->mNamespace, $this->mTextform );
 360         }
 361
 362         # Get prefixed title with underscores
 363         function getPrefixedDBkey() {
 364                 $s = $this->prefix( $this->mDbkeyform );
 365                 $s = str_replace( ' ', '_', $s );
 366                 return $s;
 367         }
 368
 369         # Get prefixed title with spaces
 370         # This is the form usually used for display
 371         function getPrefixedText() {
 372                 if ( empty( $this->mPrefixedText ) ) {
 373                         $s = $this->prefix( $this->mTextform );
 374                         $s = str_replace( '_', ' ', $s );
 375                         $this->mPrefixedText = $s;
 376                 }
 377                 return $this->mPrefixedText;
 378         }
 379
 380         # As getPrefixedText(), plus fragment.
 381         function getFullText() {
 382                 $text = $this->getPrefixedText();
 383                 if( '' != $this->mFragment ) {
 384                         $text .= '#' . $this->mFragment;
 385                 }
 386                 return $text;
 387         }
 388
 389         # Get a URL-encoded title (not an actual URL) including interwiki
 390         function getPrefixedURL() {
 391                 $s = $this->prefix( $this->mDbkeyform );
 392                 $s = str_replace( ' ', '_', $s );
 393
 394                 $s = wfUrlencode ( $s ) ;
 395
 396                 # Cleaning up URL to make it look nice -- is this safe?
 397                 $s = preg_replace( '/%3[Aa]/', ':', $s );
 398                 $s = preg_replace( '/%2[Ff]/', '/', $s );
 399                 $s = str_replace( '%28', '(', $s );
 400                 $s = str_replace( '%29', ')', $s );
 401
 402                 return $s;
 403         }
 404
 405         # Get a real URL referring to this title, with interwiki link and fragment
 406         function getFullURL( $query = '' ) {
 407                 global $wgLang, $wgArticlePath, $wgServer, $wgScript;
 408
 409                 if ( '' == $this->mInterwiki ) {
 410                         $p = $wgArticlePath;
 411                         return $wgServer . $this->getLocalUrl( $query );
 412                 } else {
 413                         $baseUrl = $this->getInterwikiLink( $this->mInterwiki );
 414                         $namespace = $wgLang->getNsText( $this->mNamespace );
 415                         if ( '' != $namespace ) {
 416                                 # Can this actually happen? Interwikis shouldn't be parsed.
 417                                 $namepace .= ':';
 418                         }
 419                         $url = str_replace( '$1', $namespace . $this->mUrlform, $baseUrl );
 420                         if ( '' != $this->mFragment ) {
 421                                 $url .= '#' . $this->mFragment;
 422                         }
 423                         return $url;
 424                 }
 425         }
 426
 427         # Get a URL with an optional query string, no fragment
 428         # * If $query=="", it will use $wgArticlePath
 429         # * Returns a full for an interwiki link, loses any query string
 430         # * Optionally adds the server and escapes for HTML
 431         # * Setting $query to "-" makes an old-style URL with nothing in the
 432         #   query except a title
 433
 434         function getURL() {
 435                 die( 'Call to obsolete obsolete function Title::getURL()' );
 436         }
 437
 438         function getLocalURL( $query = '' ) {
 439                 global $wgLang, $wgArticlePath, $wgScript;
 440
 441                 if ( $this->isExternal() ) {
 442                         return $this->getFullURL();
 443                 }
 444
 445                 $dbkey = wfUrlencode( $this->getPrefixedDBkey() );
 446                 if ( $query == '' ) {
 447                         $url = str_replace( '$1', $dbkey, $wgArticlePath );
 448                 } else {
 449                         if ( $query == '-' ) {
 450                                 $query = '';
 451                         }
 452                         if ( $wgScript != '' ) {
 453                                 $url = "{$wgScript}?title={$dbkey}&{$query}";
 454                         } else {
 455                                 # Top level wiki
 456                                 $url = "/{$dbkey}?{$query}";
 457                         }
 458                 }
 459                 return $url;
 460         }
 461
 462         function escapeLocalURL( $query = '' ) {
 463                 return htmlspecialchars( $this->getLocalURL( $query ) );
 464         }
 465
 466         function escapeFullURL( $query = '' ) {
 467                 return htmlspecialchars( $this->getFullURL( $query ) );
 468         }
 469
 470         function getInternalURL( $query = '' ) {
 471                 # Used in various Squid-related code, in case we have a different
 472                 # internal hostname for the server than the exposed one.
 473                 global $wgInternalServer;
 474                 return $wgInternalServer . $this->getLocalURL( $query );
 475         }
 476
 477         # Get the edit URL, or a null string if it is an interwiki link
 478         function getEditURL() {
 479                 global $wgServer, $wgScript;
 480
 481                 if ( '' != $this->mInterwiki ) { return ''; }
 482                 $s = $this->getLocalURL( 'action=edit' );
 483
 484                 return $s;
 485         }
 486
 487         # Get HTML-escaped displayable text
 488         # For the title field in <a> tags
 489         function getEscapedText() {
 490                 return htmlspecialchars( $this->getPrefixedText() );
 491         }
 492
 493         # Is the title interwiki?
 494         function isExternal() { return ( '' != $this->mInterwiki ); }
 495
 496         # Does the title correspond to a protected article?
 497         function isProtected() {
 498                 if ( -1 == $this->mNamespace ) { return true; }
 499                 $a = $this->getRestrictions();
 500                 if ( in_array( 'sysop', $a ) ) { return true; }
 501                 return false;
 502         }
 503
 504         # Is the page a log page, i.e. one where the history is messed up by
 505         # LogPage.php? This used to be used for suppressing diff links in recent
 506         # changes, but now that's done by setting a flag in the recentchanges
 507         # table. Hence, this probably is no longer used.
 508         function isLog() {
 509                 if ( $this->mNamespace != Namespace::getWikipedia() ) {
 510                         return false;
 511                 }
 512                 if ( ( 0 == strcmp( wfMsg( 'uploadlogpage' ), $this->mDbkeyform ) ) ||
 513                   ( 0 == strcmp( wfMsg( 'dellogpage' ), $this->mDbkeyform ) ) ) {
 514                         return true;
 515                 }
 516                 return false;
 517         }
 518
 519         # Is $wgUser is watching this page?
 520         function userIsWatching() {
 521                 global $wgUser;
 522
 523                 if ( -1 == $this->mNamespace ) { return false; }
 524                 if ( 0 == $wgUser->getID() ) { return false; }
 525
 526                 return $wgUser->isWatched( $this );
 527         }
 528
 529         # Can $wgUser edit this page?
 530         function userCanEdit() {
 531                 global $wgUser;
 532                 if ( -1 == $this->mNamespace ) { return false; }
 533                 if ( NS_MEDIAWIKI == $this->mNamespace && !$wgUser->isSysop() ) { return false; }
 534                 # if ( 0 == $this->getArticleID() ) { return false; }
 535                 if ( $this->mDbkeyform == '_' ) { return false; }
 536                 # protect global styles and js
 537                 if ( NS_MEDIAWIKI == $this->mNamespace
 538                      && preg_match("/\\.(css|js)$/", $this->mTextform )
 539                      && !$wgUser->isSysop() )
 540                 { return false; }
 541                 //if ( $this->isCssJsSubpage() and !$this->userCanEditCssJsSubpage() ) { return false; }
 542                 # protect css/js subpages of user pages
 543                 # XXX: this might be better using restrictions
 544                 # XXX: Find a way to work around the php bug that prevents using $this->userCanEditCssJsSubpage() from working
 545                 if( Namespace::getUser() == $this->mNamespace
 546                         and preg_match("/\\.(css|js)$/", $this->mTextform )
 547                         and !$wgUser->isSysop()
 548                         and !preg_match('/^'.preg_quote($wgUser->getName(), '/').'/', $this->mTextform) )
 549                 { return false; }
 550                 $ur = $wgUser->getRights();
 551                 foreach ( $this->getRestrictions() as $r ) {
 552                         if ( '' != $r && ( ! in_array( $r, $ur ) ) ) {
 553                                 return false;
 554                         }
 555                 }
 556                 return true;
 557         }
 558
 559         function userCanRead() {
 560                 global $wgUser;
 561                 global $wgWhitelistRead;
 562
 563                 if( 0 != $wgUser->getID() ) return true;
 564                 if( !is_array( $wgWhitelistRead ) ) return true;
 565
 566                 $name = $this->getPrefixedText();
 567                 if( in_array( $name, $wgWhitelistRead ) ) return true;
 568
 569                 # Compatibility with old settings
 570                 if( $this->getNamespace() == NS_MAIN ) {
 571                         if( in_array( ':' . $name, $wgWhitelistRead ) ) return true;
 572                 }
 573                 return false;
 574         }
 575
 576         function isCssJsSubpage() {
 577                 return ( Namespace::getUser() == $this->mNamespace and preg_match("/\\.(css|js)$/", $this->mTextform ) );
 578         }
 579         function isCssSubpage() {
 580                 return ( Namespace::getUser() == $this->mNamespace and preg_match("/\\.css$/", $this->mTextform ) );
 581         }
 582         function isJsSubpage() {
 583                 return ( Namespace::getUser() == $this->mNamespace and preg_match("/\\.js$/", $this->mTextform ) );
 584         }
 585         function userCanEditCssJsSubpage() {
 586                 # protect css/js subpages of user pages
 587                 # XXX: this might be better using restrictions
 588                 global $wgUser;
 589                 return ( $wgUser->isSysop() or preg_match('/^'.preg_quote($wgUser->getName()).'/', $this->mTextform) );
 590         }
 591
 592         # Accessor/initialisation for mRestrictions
 593         function getRestrictions() {
 594                 $id = $this->getArticleID();
 595                 if ( 0 == $id ) { return array(); }
 596
 597                 if ( ! $this->mRestrictionsLoaded ) {
 598                         $dbr =& wfGetDB( DB_SLAVE );
 599                         $res = $dbr->getField( 'cur', 'cur_restrictions', 'cur_id='.$id );
 600                         $this->mRestrictions = explode( ',', trim( $res ) );
 601                         $this->mRestrictionsLoaded = true;
 602                 }
 603                 return $this->mRestrictions;
 604         }
 605
 606         # Is there a version of this page in the deletion archive?
 607         # Returns the number of archived revisions
 608         function isDeleted() {
 609                 $fname = 'Title::isDeleted';
 610                 $dbr =& wfGetDB( DB_SLAVE );
 611                 $n = $dbr->getField( 'archive', 'COUNT(*)', array( 'ar_namespace' => $this->getNamespace(),
 612                         'ar_title' => $this->getDBkey() ), $fname );
 613                 return (int)$n;
 614         }
 615
 616         # Get the article ID from the link cache
 617         # $flags is a bit field, may be GAID_FOR_UPDATE to select for update
 618         function getArticleID( $flags = 0 ) {
 619                 global $wgLinkCache;
 620
 621                 if ( $flags & GAID_FOR_UPDATE ) {
 622                         $oldUpdate = $wgLinkCache->forUpdate( true );
 623                         $this->mArticleID = $wgLinkCache->addLinkObj( $this );
 624                         $wgLinkCache->forUpdate( $oldUpdate );
 625                 } else {
 626                         if ( -1 == $this->mArticleID ) {
 627                                 $this->mArticleID = $wgLinkCache->addLinkObj( $this );
 628                         }
 629                 }
 630                 return $this->mArticleID;
 631         }
 632
 633         # This clears some fields in this object, and clears any associated keys in the
 634         # "bad links" section of $wgLinkCache. This is called from Article::insertNewArticle()
 635         # to allow loading of the new cur_id. It's also called from Article::doDeleteArticle()
 636         function resetArticleID( $newid ) {
 637                 global $wgLinkCache;
 638                 $wgLinkCache->clearBadLink( $this->getPrefixedDBkey() );
 639
 640                 if ( 0 == $newid ) { $this->mArticleID = -1; }
 641                 else { $this->mArticleID = $newid; }
 642                 $this->mRestrictionsLoaded = false;
 643                 $this->mRestrictions = array();
 644         }
 645
 646         # Updates cur_touched
 647         # Called from LinksUpdate.php
 648         function invalidateCache() {
 649                 $now = wfTimestampNow();
 650                 $dbw =& wfGetDB( DB_MASTER );
 651                 $success = $dbw->updateArray( 'cur',
 652                         array( /* SET */
 653                                 'cur_touched' => wfTimestampNow()
 654                         ), array( /* WHERE */
 655                                 'cur_namespace' => $this->getNamespace() ,
 656                                 'cur_title' => $this->getDBkey()
 657                         ), 'Title::invalidateCache'
 658                 );
 659                 return $success;
 660         }
 661
 662         # Prefixes some arbitrary text with the namespace or interwiki prefix of this object
 663         /* private */ function prefix( $name ) {
 664                 global $wgLang;
 665
 666                 $p = '';
 667                 if ( '' != $this->mInterwiki ) {
 668                         $p = $this->mInterwiki . ':';
 669                 }
 670                 if ( 0 != $this->mNamespace ) {
 671                         $p .= $wgLang->getNsText( $this->mNamespace ) . ':';
 672                 }
 673                 return $p . $name;
 674         }
 675
 676         # Secure and split - main initialisation function for this object
 677         #
 678         # Assumes that mDbkeyform has been set, and is urldecoded
 679     # and uses underscores, but not otherwise munged.  This function
 680     # removes illegal characters, splits off the interwiki and
 681     # namespace prefixes, sets the other forms, and canonicalizes
 682     # everything.
 683         #
 684         /* private */ function secureAndSplit()
 685         {
 686                 global $wgLang, $wgLocalInterwiki, $wgCapitalLinks;
 687                 $fname = 'Title::secureAndSplit';
 688                 wfProfileIn( $fname );
 689
 690                 static $imgpre = false;
 691                 static $rxTc = false;
 692
 693                 # Initialisation
 694                 if ( $imgpre === false ) {
 695                         $imgpre = ':' . $wgLang->getNsText( Namespace::getImage() ) . ':';
 696                         # % is needed as well
 697                         $rxTc = '/[^' . Title::legalChars() . ']/';
 698                 }
 699
 700                 $this->mInterwiki = $this->mFragment = '';
 701                 $this->mNamespace = $this->mDefaultNamespace; # Usually NS_MAIN
 702
 703                 # Clean up whitespace
 704                 #
 705                 $t = preg_replace( "/[\\s_]+/", '_', $this->mDbkeyform );
 706                 $t = preg_replace( '/^_*(.*?)_*$/', '$1', $t );
 707
 708                 if ( '' == $t ) {
 709                         wfProfileOut( $fname );
 710                         return false;
 711                 }
 712
 713                 $this->mDbkeyform = $t;
 714                 $done = false;
 715
 716                 # :Image: namespace
 717                 if ( 0 == strncasecmp( $imgpre, $t, strlen( $imgpre ) ) ) {
 718                         $t = substr( $t, 1 );
 719                 }
 720
 721                 # Initial colon indicating main namespace
 722                 if ( ':' == $t{0} ) {
 723                         $r = substr( $t, 1 );
 724                         $this->mNamespace = NS_MAIN;
 725                 } else {
 726                         # Namespace or interwiki prefix
 727                         if ( preg_match( "/^(.+?)_*:_*(.*)$/", $t, $m ) ) {
 728                                 #$p = strtolower( $m[1] );
 729                                 $p = $m[1];
 730                                 $lowerNs = strtolower( $p );
 731                                 if ( $ns = Namespace::getCanonicalIndex( $lowerNs ) ) {
 732                                         # Canonical namespace
 733                                         $t = $m[2];
 734                                         $this->mNamespace = $ns;
 735                                 } elseif ( $ns = $wgLang->getNsIndex( $lowerNs )) {
 736                                         # Ordinary namespace
 737                                         $t = $m[2];
 738                                         $this->mNamespace = $ns;
 739                                 } elseif ( $this->getInterwikiLink( $p ) ) {
 740                                         # Interwiki link
 741                                         $t = $m[2];
 742                                         $this->mInterwiki = $p;
 743
 744                                         if ( !preg_match( "/^([A-Za-z0-9_\\x80-\\xff]+):(.*)$/", $t, $m ) ) {
 745                                                 $done = true;
 746                                         } elseif($this->mInterwiki != $wgLocalInterwiki) {
 747                                                 $done = true;
 748                                         }
 749                                 }
 750                         }
 751                         $r = $t;
 752                 }
 753
 754                 # Redundant interwiki prefix to the local wiki
 755                 if ( 0 == strcmp( $this->mInterwiki, $wgLocalInterwiki ) ) {
 756                         $this->mInterwiki = '';
 757                 }
 758                 # We already know that some pages won't be in the database!
 759                 #
 760                 if ( '' != $this->mInterwiki || -1 == $this->mNamespace ) {
 761                         $this->mArticleID = 0;
 762                 }
 763                 $f = strstr( $r, '#' );
 764                 if ( false !== $f ) {
 765                         $this->mFragment = substr( $f, 1 );
 766                         $r = substr( $r, 0, strlen( $r ) - strlen( $f ) );
 767                 }
 768
 769                 # Reject illegal characters.
 770                 #
 771                 if( preg_match( $rxTc, $r ) ) {
 772                         wfProfileOut( $fname );
 773                         return false;
 774                 }
 775
 776                 # "." and ".." conflict with the directories of those namesa
 777                 if ( strpos( $r, '.' ) !== false &&
 778                      ( $r === '.' || $r === '..' ||
 779                        strpos( $r, './' ) === 0  ||
 780                        strpos( $r, '../' ) === 0 ||
 781                        strpos( $r, '/./' ) !== false ||
 782                        strpos( $r, '/../' ) !== false ) )
 783                 {
 784                         wfProfileOut( $fname );
 785                         return false;
 786                 }
 787
 788                 # Initial capital letter
 789                 if( $wgCapitalLinks && $this->mInterwiki == '') {
 790                         $t = $wgLang->ucfirst( $r );
 791                 } else {
 792                         $t = $r;
 793                 }
 794
 795                 # Fill fields
 796                 $this->mDbkeyform = $t;
 797                 $this->mUrlform = wfUrlencode( $t );
 798
 799                 $this->mTextform = str_replace( '_', ' ', $t );
 800
 801                 wfProfileOut( $fname );
 802                 return true;
 803         }
 804
 805         # Get a title object associated with the talk page of this article
 806         function getTalkPage() {
 807                 return Title::makeTitle( Namespace::getTalk( $this->getNamespace() ), $this->getDBkey() );
 808         }
 809
 810         # Get a title object associated with the subject page of this talk page
 811         function getSubjectPage() {
 812                 return Title::makeTitle( Namespace::getSubject( $this->getNamespace() ), $this->getDBkey() );
 813         }
 814
 815         # Get an array of Title objects linking to this title
 816         # Also stores the IDs in the link cache
 817         # $options may be FOR UPDATE
 818         function getLinksTo( $options = '' ) {
 819                 global $wgLinkCache;
 820                 $id = $this->getArticleID();
 821
 822                 if ( $options ) {
 823                         $db =& wfGetDB( DB_MASTER );
 824                 } else {
 825                         $db =& wfGetDB( DB_SLAVE );
 826                 }
 827                 $cur = $db->tableName( 'cur' );
 828                 $links = $db->tableName( 'links' );
 829
 830                 $sql = "SELECT cur_namespace,cur_title,cur_id FROM $cur,$links WHERE l_from=cur_id AND l_to={$id} $options";
 831                 $res = $db->query( $sql, 'Title::getLinksTo' );
 832                 $retVal = array();
 833                 if ( $db->numRows( $res ) ) {
 834                         while ( $row = $db->fetchObject( $res ) ) {
 835                                 if ( $titleObj = Title::makeTitle( $row->cur_namespace, $row->cur_title ) ) {
 836                                         $wgLinkCache->addGoodLink( $row->cur_id, $titleObj->getPrefixedDBkey() );
 837                                         $retVal[] = $titleObj;
 838                                 }
 839                         }
 840                 }
 841                 $db->freeResult( $res );
 842                 return $retVal;
 843         }
 844
 845         # Get an array of Title objects linking to this non-existent title
 846         # Also stores the IDs in the link cache
 847         function getBrokenLinksTo( $options = '' ) {
 848                 global $wgLinkCache;
 849
 850                 if ( $options ) {
 851                         $db =& wfGetDB( DB_MASTER );
 852                 } else {
 853                         $db =& wfGetDB( DB_SLAVE );
 854                 }
 855                 $cur = $db->tableName( 'cur' );
 856                 $brokenlinks = $db->tableName( 'brokenlinks' );
 857                 $encTitle = $db->strencode( $this->getPrefixedDBkey() );
 858
 859                 $sql = "SELECT cur_namespace,cur_title,cur_id FROM $brokenlinks,$cur " .
 860                   "WHERE bl_from=cur_id AND bl_to='$encTitle' $options";
 861                 $res = $db->query( $sql, "Title::getBrokenLinksTo" );
 862                 $retVal = array();
 863                 if ( $db->numRows( $res ) ) {
 864                         while ( $row = $db->fetchObject( $res ) ) {
 865                                 $titleObj = Title::makeTitle( $row->cur_namespace, $row->cur_title );
 866                                 $wgLinkCache->addGoodLink( $row->cur_id, $titleObj->getPrefixedDBkey() );
 867                                 $retVal[] = $titleObj;
 868                         }
 869                 }
 870                 $db->freeResult( $res );
 871                 return $retVal;
 872         }
 873
 874         function getSquidURLs() {
 875                 return array(
 876                         $this->getInternalURL(),
 877                         $this->getInternalURL( 'action=history' )
 878                 );
 879         }
 880
 881         function moveNoAuth( &$nt ) {
 882                 return $this->moveTo( $nt, false );
 883         }
 884
 885         # Move a title to a new location
 886         # Returns true on success, message name on failure
 887         # auth indicates whether wgUser's permissions should be checked
 888         function moveTo( &$nt, $auth = true ) {
 889                 if( !$this or !$nt ) {
 890                         return 'badtitletext';
 891                 }
 892
 893                 $fname = 'Title::move';
 894                 $oldid = $this->getArticleID();
 895                 $newid = $nt->getArticleID();
 896
 897                 if ( strlen( $nt->getDBkey() ) < 1 ) {
 898                         return 'articleexists';
 899                 }
 900                 if ( ( ! Namespace::isMovable( $this->getNamespace() ) ) ||
 901                          ( '' == $this->getDBkey() ) ||
 902                          ( '' != $this->getInterwiki() ) ||
 903                          ( !$oldid ) ||
 904                      ( ! Namespace::isMovable( $nt->getNamespace() ) ) ||
 905                          ( '' == $nt->getDBkey() ) ||
 906                          ( '' != $nt->getInterwiki() ) ) {
 907                         return 'badarticleerror';
 908                 }
 909
 910                 if ( $auth && ( !$this->userCanEdit() || !$nt->userCanEdit() ) ) {
 911                         return 'protectedpage';
 912                 }
 913
 914                 # The move is allowed only if (1) the target doesn't exist, or
 915                 # (2) the target is a redirect to the source, and has no history
 916                 # (so we can undo bad moves right after they're done).
 917
 918                 if ( 0 != $newid ) { # Target exists; check for validity
 919                         if ( ! $this->isValidMoveTarget( $nt ) ) {
 920                                 return 'articleexists';
 921                         }
 922                         $this->moveOverExistingRedirect( $nt );
 923                 } else { # Target didn't exist, do normal move.
 924                         $this->moveToNewTitle( $nt, $newid );
 925                 }
 926
 927                 # Fixing category links (those without piped 'alternate' names) to be sorted under the new title
 928
 929                 $dbw =& wfGetDB( DB_MASTER );
 930                 $sql = "UPDATE categorylinks SET cl_sortkey=" . $dbw->addQuotes( $nt->getPrefixedText() ) .
 931                         " WHERE cl_from=" . $dbw->addQuotes( $this->getArticleID() ) .
 932                         " AND cl_sortkey=" . $dbw->addQuotes( $this->getPrefixedText() );
 933                 $dbw->query( $sql, 'SpecialMovepage::doSubmit' );
 934
 935                 # Update watchlists
 936
 937                 $oldnamespace = $this->getNamespace() & ~1;
 938                 $newnamespace = $nt->getNamespace() & ~1;
 939                 $oldtitle = $this->getDBkey();
 940                 $newtitle = $nt->getDBkey();
 941
 942                 if( $oldnamespace != $newnamespace || $oldtitle != $newtitle ) {
 943                         WatchedItem::duplicateEntries( $this, $nt );
 944                 }
 945
 946                 # Update search engine
 947                 $u = new SearchUpdate( $oldid, $nt->getPrefixedDBkey() );
 948                 $u->doUpdate();
 949                 $u = new SearchUpdate( $newid, $this->getPrefixedDBkey(), '' );
 950                 $u->doUpdate();
 951
 952                 return true;
 953         }
 954
 955         # Move page to title which is presently a redirect to the source page
 956
 957         /* private */ function moveOverExistingRedirect( &$nt ) {
 958                 global $wgUser, $wgLinkCache, $wgUseSquid, $wgMwRedir;
 959                 $fname = 'Title::moveOverExistingRedirect';
 960                 $comment = wfMsg( '1movedto2', $this->getPrefixedText(), $nt->getPrefixedText() );
 961
 962         $now = wfTimestampNow();
 963         $won = wfInvertTimestamp( $now );
 964                 $newid = $nt->getArticleID();
 965                 $oldid = $this->getArticleID();
 966                 $dbw =& wfGetDB( DB_MASTER );
 967                 $links = $dbw->tableName( 'links' );
 968
 969                 # Change the name of the target page:
 970                 $dbw->updateArray( 'cur',
 971                         /* SET */ array(
 972                                 'cur_touched' => $now,
 973                                 'cur_namespace' => $nt->getNamespace(),
 974                                 'cur_title' => $nt->getDBkey()
 975                         ),
 976                         /* WHERE */ array( 'cur_id' => $oldid ),
 977                         $fname
 978                 );
 979                 $wgLinkCache->clearLink( $nt->getPrefixedDBkey() );
 980
 981                 # Repurpose the old redirect. We don't save it to history since
 982                 # by definition if we've got here it's rather uninteresting.
 983
 984                 $redirectText = $wgMwRedir->getSynonym( 0 ) . ' [[' . $nt->getPrefixedText() . "]]\n";
 985                 $dbw->updateArray( 'cur',
 986                         /* SET */ array(
 987                                 'cur_touched' => $now,
 988                                 'cur_timestamp' => $now,
 989                                 'inverse_timestamp' => $won,
 990                                 'cur_namespace' => $this->getNamespace(),
 991                                 'cur_title' => $this->getDBkey(),
 992                                 'cur_text' => $wgMwRedir->getSynonym( 0 ) . ' [[' . $nt->getPrefixedText() . "]]\n",
 993                                 'cur_comment' => $comment,
 994                                 'cur_user' => $wgUser->getID(),
 995                                 'cur_minor_edit' => 0,
 996                                 'cur_counter' => 0,
 997                                 'cur_restrictions' => '',
 998                                 'cur_user_text' => $wgUser->getName(),
 999                                 'cur_is_redirect' => 1,
1000                                 'cur_is_new' => 1
1001                         ),
1002                         /* WHERE */ array( 'cur_id' => $newid ),
1003                         $fname
1004                 );
1005
1006                 $wgLinkCache->clearLink( $this->getPrefixedDBkey() );
1007
1008                 # Fix the redundant names for the past revisions of the target page.
1009                 # The redirect should have no old revisions.
1010                 $dbw->updateArray(
1011                         /* table */ 'old',
1012                         /* SET */ array(
1013                                 'old_namespace' => $nt->getNamespace(),
1014                                 'old_title' => $nt->getDBkey(),
1015                         ),
1016                         /* WHERE */ array(
1017                                 'old_namespace' => $this->getNamespace(),
1018                                 'old_title' => $this->getDBkey(),
1019                         ),
1020                         $fname
1021                 );
1022
1023                 RecentChange::notifyMoveOverRedirect( $now, $this, $nt, $wgUser, $comment );
1024
1025                 # Swap links
1026
1027                 # Load titles and IDs
1028                 $linksToOld = $this->getLinksTo( 'FOR UPDATE' );
1029                 $linksToNew = $nt->getLinksTo( 'FOR UPDATE' );
1030
1031                 # Delete them all
1032                 $sql = "DELETE FROM $links WHERE l_to=$oldid OR l_to=$newid";
1033                 $dbw->query( $sql, $fname );
1034
1035                 # Reinsert
1036                 if ( count( $linksToOld ) || count( $linksToNew )) {
1037                         $sql = "INSERT INTO $links (l_from,l_to) VALUES ";
1038                         $first = true;
1039
1040                         # Insert links to old title
1041                         foreach ( $linksToOld as $linkTitle ) {
1042                                 if ( $first ) {
1043                                         $first = false;
1044                                 } else {
1045                                         $sql .= ',';
1046                                 }
1047                                 $id = $linkTitle->getArticleID();
1048                                 $sql .= "($id,$newid)";
1049                         }
1050
1051                         # Insert links to new title
1052                         foreach ( $linksToNew as $linkTitle ) {
1053                                 if ( $first ) {
1054                                         $first = false;
1055                                 } else {
1056                                         $sql .= ',';
1057                                 }
1058                                 $id = $linkTitle->getArticleID();
1059                                 $sql .= "($id, $oldid)";
1060                         }
1061
1062                         $dbw->query( $sql, DB_MASTER, $fname );
1063                 }
1064
1065                 # Now, we record the link from the redirect to the new title.
1066                 # It should have no other outgoing links...
1067                 $dbw->delete( 'links', array( 'l_from' => $newid ) );
1068                 $dbw->insertArray( 'links', array( 'l_from' => $newid, 'l_to' => $oldid ) );
1069
1070                 # Clear linkscc
1071                 LinkCache::linksccClearLinksTo( $oldid );
1072                 LinkCache::linksccClearLinksTo( $newid );
1073
1074                 # Purge squid
1075                 if ( $wgUseSquid ) {
1076                         $urls = array_merge( $nt->getSquidURLs(), $this->getSquidURLs() );
1077                         $u = new SquidUpdate( $urls );
1078                         $u->doUpdate();
1079                 }
1080         }
1081
1082         # Move page to non-existing title.
1083         # Sets $newid to be the new article ID
1084
1085         /* private */ function moveToNewTitle( &$nt, &$newid ) {
1086                 global $wgUser, $wgLinkCache, $wgUseSquid;
1087                 $fname = 'MovePageForm::moveToNewTitle';
1088                 $comment = wfMsg( '1movedto2', $this->getPrefixedText(), $nt->getPrefixedText() );
1089
1090                 $now = wfTimestampNow();
1091                 $won = wfInvertTimestamp( $now );
1092                 $newid = $nt->getArticleID();
1093                 $oldid = $this->getArticleID();
1094                 $dbw =& wfGetDB( DB_MASTER );
1095
1096                 # Rename cur entry
1097                 $dbw->updateArray( 'cur',
1098                         /* SET */ array(
1099                                 'cur_touched' => $now,
1100                                 'cur_namespace' => $nt->getNamespace(),
1101                                 'cur_title' => $nt->getDBkey()
1102                         ),
1103                         /* WHERE */ array( 'cur_id' => $oldid ),
1104                         $fname
1105                 );
1106
1107                 $wgLinkCache->clearLink( $nt->getPrefixedDBkey() );
1108
1109                 # Insert redirct
1110                 $dbw->insertArray( 'cur', array(
1111                         'cur_namespace' => $this->getNamespace(),
1112                         'cur_title' => $this->getDBkey(),
1113                         'cur_comment' => $comment,
1114                         'cur_user' => $wgUser->getID(),
1115                         'cur_user_text' => $wgUser->getName(),
1116                         'cur_timestamp' => $now,
1117                         'inverse_timestamp' => $won,
1118                         'cur_touched' => $now,
1119                         'cur_is_redirect' => 1,
1120                         'cur_is_new' => 1,
1121                         'cur_text' => "#REDIRECT [[" . $nt->getPrefixedText() . "]]\n" ), $fname
1122                 );
1123                 $newid = $dbw->insertId();
1124                 $wgLinkCache->clearLink( $this->getPrefixedDBkey() );
1125
1126                 # Rename old entries
1127                 $dbw->updateArray(
1128                         /* table */ 'old',
1129                         /* SET */ array(
1130                                 'old_namespace' => $nt->getNamespace(),
1131                                 'old_title' => $nt->getDBkey()
1132                         ),
1133                         /* WHERE */ array(
1134                                 'old_namespace' => $this->getNamespace(),
1135                                 'old_title' => $this->getDBkey()
1136                         ), $fname
1137                 );
1138
1139                 # Record in RC
1140                 RecentChange::notifyMoveToNew( $now, $this, $nt, $wgUser, $comment );
1141
1142                 # Purge squid and linkscc as per article creation
1143                 Article::onArticleCreate( $nt );
1144
1145                 # Any text links to the old title must be reassigned to the redirect
1146                 $dbw->updateArray( 'links', array( 'l_to' => $newid ), array( 'l_to' => $oldid ), $fname );
1147                 LinkCache::linksccClearLinksTo( $oldid );
1148
1149                 # Record the just-created redirect's linking to the page
1150                 $dbw->insertArray( 'links', array( 'l_from' => $newid, 'l_to' => $oldid ), $fname );
1151
1152                 # Non-existent target may have had broken links to it; these must
1153                 # now be removed and made into good links.
1154                 $update = new LinksUpdate( $oldid, $nt->getPrefixedDBkey() );
1155                 $update->fixBrokenLinks();
1156
1157                 # Purge old title from squid
1158                 # The new title, and links to the new title, are purged in Article::onArticleCreate()
1159                 $titles = $nt->getLinksTo();
1160                 if ( $wgUseSquid ) {
1161                         $urls = $this->getSquidURLs();
1162                         foreach ( $titles as $linkTitle ) {
1163                                 $urls[] = $linkTitle->getInternalURL();
1164                         }
1165                         $u = new SquidUpdate( $urls );
1166                         $u->doUpdate();
1167                 }
1168         }
1169
1170         # Checks if $this can be moved to $nt
1171         # Selects for update, so don't call it unless you mean business
1172         function isValidMoveTarget( $nt ) {
1173                 $fname = 'Title::isValidMoveTarget';
1174                 $dbw =& wfGetDB( DB_MASTER );
1175
1176                 # Is it a redirect?
1177                 $id  = $nt->getArticleID();
1178                 $obj = $dbw->getArray( 'cur', array( 'cur_is_redirect','cur_text' ),
1179                         array( 'cur_id' => $id ), $fname, 'FOR UPDATE' );
1180
1181                 if ( !$obj || 0 == $obj->cur_is_redirect ) {
1182                         # Not a redirect
1183                         return false;
1184                 }
1185
1186                 # Does the redirect point to the source?
1187                 if ( preg_match( "/\\[\\[\\s*([^\\]\\|]*)]]/", $obj->cur_text, $m ) ) {
1188                         $redirTitle = Title::newFromText( $m[1] );
1189                         if( !is_object( $redirTitle ) ||
1190                                 $redirTitle->getPrefixedDBkey() != $this->getPrefixedDBkey() ) {
1191                                 return false;
1192                         }
1193                 }
1194
1195                 # Does the article have a history?
1196                 $row = $dbw->getArray( 'old', array( 'old_id' ),
1197                         array(
1198                                 'old_namespace' => $nt->getNamespace(),
1199                                 'old_title' => $nt->getDBkey()
1200                         ), $fname, 'FOR UPDATE'
1201                 );
1202
1203                 # Return true if there was no history
1204                 return $row === false;
1205         }
1206
1207         # Create a redirect, fails if the title already exists, does not notify RC
1208         # Returns success
1209         function createRedirect( $dest, $comment ) {
1210                 global $wgUser;
1211                 if ( $this->getArticleID() ) {
1212                         return false;
1213                 }
1214
1215                 $fname = 'Title::createRedirect';
1216                 $dbw =& wfGetDB( DB_MASTER );
1217                 $now = wfTimestampNow();
1218                 $won = wfInvertTimestamp( $now );
1219                 $seqVal = $dbw->nextSequenceValue( 'cur_cur_id_seq' );
1220
1221                 $dbw->insertArray( 'cur', array(
1222                         'cur_id' => $seqVal,
1223                         'cur_namespace' => $this->getNamespace(),
1224                         'cur_title' => $this->getDBkey(),
1225                         'cur_comment' => $comment,
1226                         'cur_user' => $wgUser->getID(),
1227                         'cur_user_text' => $wgUser->getName(),
1228                         'cur_timestamp' => $now,
1229                         'inverse_timestamp' => $won,
1230                         'cur_touched' => $now,
1231                         'cur_is_redirect' => 1,
1232                         'cur_is_new' => 1,
1233                         'cur_text' => "#REDIRECT [[" . $dest->getPrefixedText() . "]]\n"
1234                 ), $fname );
1235                 $newid = $dbw->insertId();
1236                 $this->resetArticleID( $newid );
1237
1238                 # Link table
1239                 if ( $dest->getArticleID() ) {
1240                         $dbw->insertArray( 'links',
1241                                 array(
1242                                         'l_to' => $dest->getArticleID(),
1243                                         'l_from' => $newid
1244                                 ), $fname
1245                         );
1246                 } else {
1247                         $dbw->insertArray( 'brokenlinks',
1248                                 array(
1249                                         'bl_to' => $dest->getPrefixedDBkey(),
1250                                         'bl_from' => $newid
1251                                 ), $fname
1252                         );
1253                 }
1254
1255                 Article::onArticleCreate( $this );
1256                 return true;
1257         }
1258
1259         # Get categories to wich belong this title and return an array of
1260         # categories names.
1261         # Return an array of parents in the form:
1262         #  $parent => $currentarticle
1263         function getParentCategories() {
1264                 global $wgLang,$wgUser;
1265
1266                 $titlekey = $this->getArticleId();
1267                 $sk =& $wgUser->getSkin();
1268                 $parents = array();
1269                 $dbr =& wfGetDB( DB_SLAVE );
1270                 $cur = $dbr->tableName( 'cur' );
1271                 $categorylinks = $dbr->tableName( 'categorylinks' );
1272
1273                 # NEW SQL
1274                 $sql = "SELECT * FROM categorylinks"
1275                      ." WHERE cl_from='$titlekey'"
1276                          ." AND cl_from <> '0'"
1277                          ." ORDER BY cl_sortkey";
1278
1279                 $res = $dbr->query ( $sql ) ;
1280
1281                 if($dbr->numRows($res) > 0) {
1282                         while ( $x = $dbr->fetchObject ( $res ) )
1283                                 //$data[] = Title::newFromText($wgLang->getNSText ( NS_CATEGORY ).':'.$x->cl_to);
1284                                 $data[$wgLang->getNSText ( NS_CATEGORY ).':'.$x->cl_to] = $this->getFullText();
1285                         $dbr->freeResult ( $res ) ;
1286                 } else {
1287                         $data = '';
1288                 }
1289                 return $data;
1290         }
1291
1292         # Go through all parents
1293         function getCategorieBrowser() {
1294                 $parents = $this->getParentCategories();
1295
1296                 if($parents != '') {
1297                         foreach($parents as $parent => $current)
1298                         {
1299                                 $nt = Title::newFromText($parent);
1300                                 $stack[$parent] = $nt->getCategorieBrowser();
1301                         }
1302                         return $stack;
1303                 } else {
1304                         return array();
1305                 }
1306         }
1307
1308
1309         # Returns an associative array for selecting this title from cur
1310         function curCond() {
1311                 return array( 'cur_namespace' => $this->mNamespace, 'cur_title' => $this->mDbkeyform );
1312         }
1313
1314         function oldCond() {
1315                 return array( 'old_namespace' => $this->mNamespace, 'old_title' => $this->mDbkeyform );
1316         }
1317 }
1318 ?>