includes/Title.php

   1 <?php
   2 /**
   3  * $Id$
   4  * See title.doc
   5  *
   6  * @package MediaWiki
   7  */
   8
   9 /** */
  10 require_once( 'normal/UtfNormal.php' );
  11
  12 $wgTitleInterwikiCache = array();
  13 define ( 'GAID_FOR_UPDATE', 1 );
  14
  15 /**
  16  * Title class
  17  * - Represents a title, which may contain an interwiki designation or namespace
  18  * - Can fetch various kinds of data from the database, albeit inefficiently.
  19  *
  20  * @package MediaWiki
  21  */
  22 class Title {
  23         /**
  24          * All member variables should be considered private
  25          * Please use the accessor functions
  26          */
  27
  28          /**#@+
  29          * @access private
  30          */
  31
  32         var $mTextform;           # Text form (spaces not underscores) of the main part
  33         var $mUrlform;            # URL-encoded form of the main part
  34         var $mDbkeyform;          # Main part with underscores
  35         var $mNamespace;          # Namespace index, i.e. one of the NS_xxxx constants
  36         var $mInterwiki;          # Interwiki prefix (or null string)
  37         var $mFragment;           # Title fragment (i.e. the bit after the #)
  38         var $mArticleID;          # Article ID, fetched from the link cache on demand
  39         var $mRestrictions;       # Array of groups allowed to edit this article
  40                               # Only null or "sysop" are supported
  41         var $mRestrictionsLoaded; # Boolean for initialisation on demand
  42         var $mPrefixedText;       # Text form including namespace/interwiki, initialised on demand
  43         var $mDefaultNamespace;   # Namespace index when there is no namespace
  44                               # Zero except in {{transclusion}} tags
  45         /**#@-*/
  46
  47
  48         /**
  49          * Constructor
  50          * @access private
  51          */
  52         /* private */ function Title() {
  53                 $this->mInterwiki = $this->mUrlform =
  54                 $this->mTextform = $this->mDbkeyform = '';
  55                 $this->mArticleID = -1;
  56                 $this->mNamespace = 0;
  57                 $this->mRestrictionsLoaded = false;
  58                 $this->mRestrictions = array();
  59                 $this->mDefaultNamespace = 0;
  60         }
  61
  62         /**
  63          * Create a new Title from a prefixed DB key
  64          * @param string $key The database key, which has underscores
  65          *      instead of spaces, possibly including namespace and
  66          *      interwiki prefixes
  67          * @return Title the new object, or NULL on an error
  68          * @static
  69          * @access public
  70          */
  71         /* static */ function newFromDBkey( $key ) {
  72                 $t = new Title();
  73                 $t->mDbkeyform = $key;
  74                 if( $t->secureAndSplit() )
  75                         return $t;
  76                 else
  77                         return NULL;
  78         }
  79
  80         /**
  81          * Create a new Title from text, such as what one would
  82          * find in a link. Decodes any HTML entities in the text.
  83          *
  84          * @param string $text the link text; spaces, prefixes,
  85          *      and an initial ':' indicating the main namespace
  86          *      are accepted
  87          * @param int $defaultNamespace the namespace to use if
  88          *      none is specified by a prefix
  89          * @return Title the new object, or NULL on an error
  90          * @static
  91          * @access public
  92          */
  93         /* static */ function newFromText( $text, $defaultNamespace = 0 ) {
  94                 $fname = 'Title::newFromText';
  95                 wfProfileIn( $fname );
  96
  97                 if( is_object( $text ) ) {
  98                         wfDebugDieBacktrace( 'Called with object instead of string.' );
  99                 }
 100                 global $wgInputEncoding;
 101                 $text = do_html_entity_decode( $text, ENT_COMPAT, $wgInputEncoding );
 102
 103                 $text = wfMungeToUtf8( $text );
 104
 105
 106                 # What was this for? TS 2004-03-03
 107                 # $text = urldecode( $text );
 108
 109                 $t = new Title();
 110                 $t->mDbkeyform = str_replace( ' ', '_', $text );
 111                 $t->mDefaultNamespace = $defaultNamespace;
 112
 113                 wfProfileOut( $fname );
 114                 if ( !is_object( $t ) ) {
 115                         var_dump( debug_backtrace() );
 116                 }
 117                 if( $t->secureAndSplit() ) {
 118                         return $t;
 119                 } else {
 120                         return NULL;
 121                 }
 122         }
 123
 124         /**
 125          * Create a new Title from URL-encoded text. Ensures that
 126          * the given title's length does not exceed the maximum.
 127          * @param string $url the title, as might be taken from a URL
 128          * @return Title the new object, or NULL on an error
 129          * @static
 130          * @access public
 131          */
 132         /* static */ function newFromURL( $url ) {
 133                 global $wgLang, $wgServer;
 134                 $t = new Title();
 135
 136                 # For compatibility with old buggy URLs. "+" is not valid in titles,
 137                 # but some URLs used it as a space replacement and they still come
 138                 # from some external search tools.
 139                 $s = str_replace( '+', ' ', $url );
 140
 141                 $t->mDbkeyform = str_replace( ' ', '_', $s );
 142                 if( $t->secureAndSplit() ) {
 143                         # check that length of title is < cur_title size
 144                         $dbr =& wfGetDB( DB_SLAVE );
 145                         $maxSize = $dbr->textFieldSize( 'cur', 'cur_title' );
 146                         if ( $maxSize != -1 && strlen( $t->mDbkeyform ) > $maxSize ) {
 147                                 return NULL;
 148                         }
 149
 150                         return $t;
 151                 } else {
 152                         return NULL;
 153                 }
 154         }
 155
 156         /**
 157          * Create a new Title from an article ID
 158          * @todo This is inefficiently implemented, the cur row is requested
 159          * but not used for anything else
 160          * @param int $id the cur_id corresponding to the Title to create
 161          * @return Title the new object, or NULL on an error
 162          * @access public
 163          */
 164         /* static */ function newFromID( $id ) {
 165                 $fname = 'Title::newFromID';
 166                 $dbr =& wfGetDB( DB_SLAVE );
 167                 $row = $dbr->getArray( 'cur', array( 'cur_namespace', 'cur_title' ),
 168                         array( 'cur_id' => $id ), $fname );
 169                 if ( $row !== false ) {
 170                         $title = Title::makeTitle( $row->cur_namespace, $row->cur_title );
 171                 } else {
 172                         $title = NULL;
 173                 }
 174                 return $title;
 175         }
 176
 177         /**
 178          * Create a new Title from a namespace index and a DB key.
 179          * It's assumed that $ns and $title are *valid*, for instance when
 180          * they came directly from the database or a special page name.
 181          * @param int $ns the namespace of the article
 182          * @param string $title the unprefixed database key form
 183          * @return Title the new object
 184          * @static
 185          * @access public
 186          */
 187         /* static */ function &makeTitle( $ns, $title ) {
 188                 $t =& new Title();
 189                 $t->mInterwiki = '';
 190                 $t->mFragment = '';
 191                 $t->mNamespace = $ns;
 192                 $t->mDbkeyform = $title;
 193                 $t->mArticleID = ( $ns >= 0 ) ? -1 : 0;
 194                 $t->mUrlform = wfUrlencode( $title );
 195                 $t->mTextform = str_replace( '_', ' ', $title );
 196                 return $t;
 197         }
 198
 199         /**
 200          * Create a new Title frrom a namespace index and a DB key.
 201          * The parameters will be checked for validity, which is a bit slower
 202          * than makeTitle() but safer for user-provided data.
 203          * @param int $ns the namespace of the article
 204          * @param string $title the database key form
 205          * @return Title the new object, or NULL on an error
 206          * @static
 207          * @access public
 208          */
 209         /* static */ function makeTitleSafe( $ns, $title ) {
 210                 $t = new Title();
 211                 $t->mDbkeyform = Title::makeName( $ns, $title );
 212                 if( $t->secureAndSplit() ) {
 213                         return $t;
 214                 } else {
 215                         return NULL;
 216                 }
 217         }
 218
 219         /**
 220          * Create a new Title for the Main Page
 221          * @static
 222          * @return Title the new object
 223          * @access public
 224          */
 225         /* static */ function newMainPage() {
 226                 return Title::newFromText( wfMsgForContent( 'mainpage' ) );
 227         }
 228
 229         /**
 230          * Create a new Title for a redirect
 231          * @param string $text the redirect title text
 232          * @return Title the new object, or NULL if the text is not a
 233          *      valid redirect
 234          * @static
 235          * @access public
 236          */
 237         /* static */ function newFromRedirect( $text ) {
 238                 global $wgMwRedir;
 239                 $rt = NULL;
 240                 if ( $wgMwRedir->matchStart( $text ) ) {
 241                         if ( preg_match( '/\\[\\[([^\\]\\|]+)[\\]\\|]/', $text, $m ) ) {
 242                                 # categories are escaped using : for example one can enter:
 243                                 # #REDIRECT [[:Category:Music]]. Need to remove it.
 244                                 if ( substr($m[1],0,1) == ':') {
 245                                         # We don't want to keep the ':'
 246                                         $m[1] = substr( $m[1], 1 );
 247                                 }
 248
 249                                 $rt = Title::newFromText( $m[1] );
 250                                 # Disallow redirects to Special:Userlogout
 251                                 if ( !is_null($rt) && $rt->getNamespace() == NS_SPECIAL && preg_match( '/^Userlogout/i', $rt->getText() ) ) {
 252                                         $rt = NULL;
 253                                 }
 254                         }
 255                 }
 256                 return $rt;
 257         }
 258
 259 #----------------------------------------------------------------------------
 260 #       Static functions
 261 #----------------------------------------------------------------------------
 262
 263         /**
 264          * Get the prefixed DB key associated with an ID
 265          * @param int $id the cur_id of the article
 266          * @return Title an object representing the article, or NULL
 267          *      if no such article was found
 268          * @static
 269          * @access public
 270          */
 271         /* static */ function nameOf( $id ) {
 272                 $fname = 'Title::nameOf';
 273                 $dbr =& wfGetDB( DB_SLAVE );
 274
 275                 $s = $dbr->getArray( 'cur', array( 'cur_namespace','cur_title' ),  array( 'cur_id' => $id ), $fname );
 276                 if ( $s === false ) { return NULL; }
 277
 278                 $n = Title::makeName( $s->cur_namespace, $s->cur_title );
 279                 return $n;
 280         }
 281
 282         /**
 283          * Get a regex character class describing the legal characters in a link
 284          * @return string the list of characters, not delimited
 285          * @static
 286          * @access public
 287          */
 288         /* static */ function legalChars() {
 289                 # Missing characters:
 290                 #  * []|# Needed for link syntax
 291                 #  * % and + are corrupted by Apache when they appear in the path
 292                 #
 293                 # % seems to work though
 294                 #
 295                 # The problem with % is that URLs are double-unescaped: once by Apache's
 296                 # path conversion code, and again by PHP. So %253F, for example, becomes "?".
 297                 # Our code does not double-escape to compensate for this, indeed double escaping
 298                 # would break if the double-escaped title was passed in the query string
 299                 # rather than the path. This is a minor security issue because articles can be
 300                 # created such that they are hard to view or edit. -- TS
 301                 #
 302                 # Theoretically 0x80-0x9F of ISO 8859-1 should be disallowed, but
 303                 # this breaks interlanguage links
 304
 305                 $set = " %!\"$&'()*,\\-.\\/0-9:;=?@A-Z\\\\^_`a-z~\\x80-\\xFF";
 306                 return $set;
 307         }
 308
 309         /**
 310          * Get a string representation of a title suitable for
 311          * including in a search index
 312          *
 313          * @param int $ns a namespace index
 314          * @param string $title text-form main part
 315          * @return string a stripped-down title string ready for the
 316          *      search index
 317          */
 318         /* static */ function indexTitle( $ns, $title ) {
 319                 global $wgDBminWordLen, $wgContLang;
 320                 require_once( 'SearchEngine.php' );
 321
 322                 $lc = SearchEngine::legalSearchChars() . '&#;';
 323                 $t = $wgContLang->stripForSearch( $title );
 324                 $t = preg_replace( "/[^{$lc}]+/", ' ', $t );
 325                 $t = strtolower( $t );
 326
 327                 # Handle 's, s'
 328                 $t = preg_replace( "/([{$lc}]+)'s( |$)/", "\\1 \\1's ", $t );
 329                 $t = preg_replace( "/([{$lc}]+)s'( |$)/", "\\1s ", $t );
 330
 331                 $t = preg_replace( "/\\s+/", ' ', $t );
 332
 333                 if ( $ns == Namespace::getImage() ) {
 334                         $t = preg_replace( "/ (png|gif|jpg|jpeg|ogg)$/", "", $t );
 335                 }
 336                 return trim( $t );
 337         }
 338
 339         /*
 340          * Make a prefixed DB key from a DB key and a namespace index
 341          * @param int $ns numerical representation of the namespace
 342          * @param string $title the DB key form the title
 343          * @return string the prefixed form of the title
 344          */
 345         /* static */ function makeName( $ns, $title ) {
 346                 global $wgContLang;
 347
 348                 $n = $wgContLang->getNsText( $ns );
 349                 if ( '' == $n ) { return $title; }
 350                 else { return $n.':'.$title; }
 351         }
 352
 353         /**
 354          * Returns the URL associated with an interwiki prefix
 355          * @param string $key the interwiki prefix (e.g. "MeatBall")
 356          * @return the associated URL, containing "$1", which should be
 357          *      replaced by an article title
 358          * @static (arguably)
 359          * @access public
 360          */
 361         function getInterwikiLink( $key ) {
 362                 global $wgMemc, $wgDBname, $wgInterwikiExpiry, $wgTitleInterwikiCache;
 363                 $fname = 'Title::getInterwikiLink';
 364                 $k = $wgDBname.':interwiki:'.$key;
 365
 366                 if( array_key_exists( $k, $wgTitleInterwikiCache ) )
 367                         return $wgTitleInterwikiCache[$k]->iw_url;
 368
 369                 $s = $wgMemc->get( $k );
 370                 # Ignore old keys with no iw_local
 371                 if( $s && isset( $s->iw_local ) ) {
 372                         $wgTitleInterwikiCache[$k] = $s;
 373                         return $s->iw_url;
 374                 }
 375                 $dbr =& wfGetDB( DB_SLAVE );
 376                 $res = $dbr->select( 'interwiki', array( 'iw_url', 'iw_local' ), array( 'iw_prefix' => $key ), $fname );
 377                 if(!$res) return '';
 378
 379                 $s = $dbr->fetchObject( $res );
 380                 if(!$s) {
 381                         # Cache non-existence: create a blank object and save it to memcached
 382                         $s = (object)false;
 383                         $s->iw_url = '';
 384                         $s->iw_local = 0;
 385                 }
 386                 $wgMemc->set( $k, $s, $wgInterwikiExpiry );
 387                 $wgTitleInterwikiCache[$k] = $s;
 388                 return $s->iw_url;
 389         }
 390
 391         /**
 392          * Determine whether the object refers to a page within
 393          * this project.
 394          *
 395          * @return bool TRUE if this is an in-project interwiki link
 396          *      or a wikilink, FALSE otherwise
 397          * @access public
 398          */
 399         function isLocal() {
 400                 global $wgTitleInterwikiCache, $wgDBname;
 401
 402                 if ( $this->mInterwiki != '' ) {
 403                         # Make sure key is loaded into cache
 404                         $this->getInterwikiLink( $this->mInterwiki );
 405                         $k = $wgDBname.':interwiki:' . $this->mInterwiki;
 406                         return (bool)($wgTitleInterwikiCache[$k]->iw_local);
 407                 } else {
 408                         return true;
 409                 }
 410         }
 411
 412         /**
 413          * Update the cur_touched field for an array of title objects
 414          * @todo Inefficient unless the IDs are already loaded into the
 415          *      link cache
 416          * @param array $titles an array of Title objects to be touched
 417          * @param string $timestamp the timestamp to use instead of the
 418          *      default current time
 419          * @static
 420          * @access public
 421          */
 422         /* static */ function touchArray( $titles, $timestamp = '' ) {
 423                 if ( count( $titles ) == 0 ) {
 424                         return;
 425                 }
 426                 $dbw =& wfGetDB( DB_MASTER );
 427                 if ( $timestamp == '' ) {
 428                         $timestamp = $dbw->timestamp();
 429                 }
 430                 $cur = $dbw->tableName( 'cur' );
 431                 $sql = "UPDATE $cur SET cur_touched='{$timestamp}' WHERE cur_id IN (";
 432                 $first = true;
 433
 434                 foreach ( $titles as $title ) {
 435                         if ( ! $first ) {
 436                                 $sql .= ',';
 437                         }
 438                         $first = false;
 439                         $sql .= $title->getArticleID();
 440                 }
 441                 $sql .= ')';
 442                 if ( ! $first ) {
 443                         $dbw->query( $sql, 'Title::touchArray' );
 444                 }
 445         }
 446
 447 #----------------------------------------------------------------------------
 448 #       Other stuff
 449 #----------------------------------------------------------------------------
 450
 451         /** Simple accessors */
 452         /**
 453          * Get the text form (spaces not underscores) of the main part
 454          * @return string
 455          * @access public
 456          */
 457         function getText() { return $this->mTextform; }
 458         /**
 459          * Get the URL-encoded form of the main part
 460          * @return string
 461          * @access public
 462          */
 463         function getPartialURL() { return $this->mUrlform; }
 464         /**
 465          * Get the main part with underscores
 466          * @return string
 467          * @access public
 468          */
 469         function getDBkey() { return $this->mDbkeyform; }
 470         /**
 471          * Get the namespace index, i.e. one of the NS_xxxx constants
 472          * @return int
 473          * @access public
 474          */
 475         function getNamespace() { return $this->mNamespace; }
 476         /**
 477          * Set the namespace index
 478          * @param int $n the namespace index, one of the NS_xxxx constants
 479          * @access public
 480          */
 481         function setNamespace( $n ) { $this->mNamespace = $n; }
 482         /**
 483          * Get the interwiki prefix (or null string)
 484          * @return string
 485          * @access public
 486          */
 487         function getInterwiki() { return $this->mInterwiki; }
 488         /**
 489          * Get the Title fragment (i.e. the bit after the #)
 490          * @return string
 491          * @access public
 492          */
 493         function getFragment() { return $this->mFragment; }
 494         /**
 495          * Get the default namespace index, for when there is no namespace
 496          * @return int
 497          * @access public
 498          */
 499         function getDefaultNamespace() { return $this->mDefaultNamespace; }
 500
 501         /**
 502          * Get title for search index
 503          * @return string a stripped-down title string ready for the
 504          *      search index
 505          */
 506         function getIndexTitle() {
 507                 return Title::indexTitle( $this->mNamespace, $this->mTextform );
 508         }
 509
 510         /**
 511          * Get the prefixed database key form
 512          * @return string the prefixed title, with underscores and
 513          *      any interwiki and namespace prefixes
 514          * @access public
 515          */
 516         function getPrefixedDBkey() {
 517                 $s = $this->prefix( $this->mDbkeyform );
 518                 $s = str_replace( ' ', '_', $s );
 519                 return $s;
 520         }
 521
 522         /**
 523          * Get the prefixed title with spaces.
 524          * This is the form usually used for display
 525          * @return string the prefixed title, with spaces
 526          * @access public
 527          */
 528         function getPrefixedText() {
 529                 if ( empty( $this->mPrefixedText ) ) {
 530                         $s = $this->prefix( $this->mTextform );
 531                         $s = str_replace( '_', ' ', $s );
 532                         $this->mPrefixedText = $s;
 533                 }
 534                 return $this->mPrefixedText;
 535         }
 536
 537         /**
 538          * Get the prefixed title with spaces, plus any fragment
 539          * (part beginning with '#')
 540          * @return string the prefixed title, with spaces and
 541          *      the fragment, including '#'
 542          * @access public
 543          */
 544         function getFullText() {
 545                 $text = $this->getPrefixedText();
 546                 if( '' != $this->mFragment ) {
 547                         $text .= '#' . $this->mFragment;
 548                 }
 549                 return $text;
 550         }
 551
 552         /**
 553          * Get a URL-encoded title (not an actual URL) including interwiki
 554          * @return string the URL-encoded form
 555          * @access public
 556          */
 557         function getPrefixedURL() {
 558                 $s = $this->prefix( $this->mDbkeyform );
 559                 $s = str_replace( ' ', '_', $s );
 560
 561                 $s = wfUrlencode ( $s ) ;
 562
 563                 # Cleaning up URL to make it look nice -- is this safe?
 564                 $s = preg_replace( '/%3[Aa]/', ':', $s );
 565                 $s = preg_replace( '/%2[Ff]/', '/', $s );
 566                 $s = str_replace( '%28', '(', $s );
 567                 $s = str_replace( '%29', ')', $s );
 568
 569                 return $s;
 570         }
 571
 572         /**
 573          * Get a real URL referring to this title, with interwiki link and
 574          * fragment
 575          *
 576          * @param string $query an optional query string, not used
 577          *      for interwiki links
 578          * @return string the URL
 579          * @access public
 580          */
 581         function getFullURL( $query = '' ) {
 582                 global $wgContLang, $wgArticlePath, $wgServer, $wgScript;
 583
 584                 if ( '' == $this->mInterwiki ) {
 585                         $p = $wgArticlePath;
 586                         return $wgServer . $this->getLocalUrl( $query );
 587                 } else {
 588                         $baseUrl = $this->getInterwikiLink( $this->mInterwiki );
 589                         $namespace = $wgContLang->getNsText( $this->mNamespace );
 590                         if ( '' != $namespace ) {
 591                                 # Can this actually happen? Interwikis shouldn't be parsed.
 592                                 $namepace .= ':';
 593                         }
 594                         $url = str_replace( '$1', $namespace . $this->mUrlform, $baseUrl );
 595                         if ( '' != $this->mFragment ) {
 596                                 $url .= '#' . $this->mFragment;
 597                         }
 598                         return $url;
 599                 }
 600         }
 601
 602         /**
 603          * @deprecated
 604          */
 605         function getURL() {
 606                 die( 'Call to obsolete obsolete function Title::getURL()' );
 607         }
 608
 609         /**
 610          * Get a URL with no fragment or server name
 611          * @param string $query an optional query string; if not specified,
 612          *      $wgArticlePath will be used.
 613          * @return string the URL
 614          * @access public
 615          */
 616         function getLocalURL( $query = '' ) {
 617                 global $wgLang, $wgArticlePath, $wgScript;
 618
 619                 if ( $this->isExternal() ) {
 620                         return $this->getFullURL();
 621                 }
 622
 623                 $dbkey = wfUrlencode( $this->getPrefixedDBkey() );
 624                 if ( $query == '' ) {
 625                         $url = str_replace( '$1', $dbkey, $wgArticlePath );
 626                 } else {
 627                         if ( $query == '-' ) {
 628                                 $query = '';
 629                         }
 630                         if ( $wgScript != '' ) {
 631                                 $url = "{$wgScript}?title={$dbkey}&{$query}";
 632                         } else {
 633                                 # Top level wiki
 634                                 $url = "/{$dbkey}?{$query}";
 635                         }
 636                 }
 637                 return $url;
 638         }
 639
 640         /**
 641          * Get an HTML-escaped version of the URL form, suitable for
 642          * using in a link, without a server name or fragment
 643          * @param string $query an optional query string
 644          * @return string the URL
 645          * @access public
 646          */
 647         function escapeLocalURL( $query = '' ) {
 648                 return htmlspecialchars( $this->getLocalURL( $query ) );
 649         }
 650
 651         /**
 652          * Get an HTML-escaped version of the URL form, suitable for
 653          * using in a link, including the server name and fragment
 654          *
 655          * @return string the URL
 656          * @param string $query an optional query string
 657          * @access public
 658          */
 659         function escapeFullURL( $query = '' ) {
 660                 return htmlspecialchars( $this->getFullURL( $query ) );
 661         }
 662
 663         /**
 664          * Get the URL form for an internal link.
 665          * - Used in various Squid-related code, in case we have a different
 666          * internal hostname for the server from the exposed one.
 667          *
 668          * @param string $query an optional query string
 669          * @return string the URL
 670          * @access public
 671          */
 672         function getInternalURL( $query = '' ) {
 673                 global $wgInternalServer;
 674                 return $wgInternalServer . $this->getLocalURL( $query );
 675         }
 676
 677         /**
 678          * Get the edit URL for this Title
 679          * @return string the URL, or a null string if this is an
 680          *      interwiki link
 681          * @access public
 682          */
 683         function getEditURL() {
 684                 global $wgServer, $wgScript;
 685
 686                 if ( '' != $this->mInterwiki ) { return ''; }
 687                 $s = $this->getLocalURL( 'action=edit' );
 688
 689                 return $s;
 690         }
 691
 692         /**
 693          * Get the HTML-escaped displayable text form.
 694          * Used for the title field in <a> tags.
 695          * @return string the text, including any prefixes
 696          * @access public
 697          */
 698         function getEscapedText() {
 699                 return htmlspecialchars( $this->getPrefixedText() );
 700         }
 701
 702         /**
 703          * Is this Title interwiki?
 704          * @return boolean
 705          * @access public
 706          */
 707         function isExternal() { return ( '' != $this->mInterwiki ); }
 708
 709         /**
 710          * Does the title correspond to a protected article?
 711          * @return boolean
 712          * @access public
 713          */
 714         function isProtected() {
 715                 if ( -1 == $this->mNamespace ) { return true; }
 716                 $a = $this->getRestrictions();
 717                 if ( in_array( 'sysop', $a ) ) { return true; }
 718                 return false;
 719         }
 720
 721         /**
 722          * Is the page a log page, i.e. one where the history is messed up by
 723          * LogPage.php? This used to be used for suppressing diff links in
 724          * recent changes, but now that's done by setting a flag in the
 725          * recentchanges table. Hence, this probably is no longer used.
 726          *
 727          * @deprecated
 728          * @access public
 729          */
 730         function isLog() {
 731                 if ( $this->mNamespace != Namespace::getWikipedia() ) {
 732                         return false;
 733                 }
 734                 if ( ( 0 == strcmp( wfMsg( 'uploadlogpage' ), $this->mDbkeyform ) ) ||
 735                   ( 0 == strcmp( wfMsg( 'dellogpage' ), $this->mDbkeyform ) ) ) {
 736                         return true;
 737                 }
 738                 return false;
 739         }
 740
 741         /**
 742          * Is $wgUser is watching this page?
 743          * @return boolean
 744          * @access public
 745          */
 746         function userIsWatching() {
 747                 global $wgUser;
 748
 749                 if ( -1 == $this->mNamespace ) { return false; }
 750                 if ( 0 == $wgUser->getID() ) { return false; }
 751
 752                 return $wgUser->isWatched( $this );
 753         }
 754
 755         /**
 756          * Can $wgUser edit this page?
 757          * @return boolean
 758          * @access public
 759          */
 760         function userCanEdit() {
 761                 global $wgUser;
 762                 if ( -1 == $this->mNamespace ) { return false; }
 763                 if ( NS_MEDIAWIKI == $this->mNamespace && !$wgUser->isSysop() ) { return false; }
 764                 # if ( 0 == $this->getArticleID() ) { return false; }
 765                 if ( $this->mDbkeyform == '_' ) { return false; }
 766                 # protect global styles and js
 767                 if ( NS_MEDIAWIKI == $this->mNamespace
 768                      && preg_match("/\\.(css|js)$/", $this->mTextform )
 769                      && !$wgUser->isSysop() )
 770                 { return false; }
 771                 //if ( $this->isCssJsSubpage() and !$this->userCanEditCssJsSubpage() ) { return false; }
 772                 # protect css/js subpages of user pages
 773                 # XXX: this might be better using restrictions
 774                 # XXX: Find a way to work around the php bug that prevents using $this->userCanEditCssJsSubpage() from working
 775                 if( Namespace::getUser() == $this->mNamespace
 776                         and preg_match("/\\.(css|js)$/", $this->mTextform )
 777                         and !$wgUser->isSysop()
 778                         and !preg_match('/^'.preg_quote($wgUser->getName(), '/').'/', $this->mTextform) )
 779                 { return false; }
 780                 $ur = $wgUser->getRights();
 781                 foreach ( $this->getRestrictions() as $r ) {
 782                         if ( '' != $r && ( ! in_array( $r, $ur ) ) ) {
 783                                 return false;
 784                         }
 785                 }
 786                 return true;
 787         }
 788
 789         /**
 790          * Can $wgUser read this page?
 791          * @return boolean
 792          * @access public
 793          */
 794         function userCanRead() {
 795                 global $wgUser;
 796                 global $wgWhitelistRead;
 797
 798                 if( 0 != $wgUser->getID() ) return true;
 799                 if( !is_array( $wgWhitelistRead ) ) return true;
 800
 801                 $name = $this->getPrefixedText();
 802                 if( in_array( $name, $wgWhitelistRead ) ) return true;
 803
 804                 # Compatibility with old settings
 805                 if( $this->getNamespace() == NS_MAIN ) {
 806                         if( in_array( ':' . $name, $wgWhitelistRead ) ) return true;
 807                 }
 808                 return false;
 809         }
 810
 811         /**
 812          * Is this a .css or .js subpage of a user page?
 813          * @return bool
 814          * @access public
 815          */
 816         function isCssJsSubpage() {
 817                 return ( Namespace::getUser() == $this->mNamespace and preg_match("/\\.(css|js)$/", $this->mTextform ) );
 818         }
 819         /**
 820          * Is this a .css subpage of a user page?
 821          * @return bool
 822          * @access public
 823          */
 824         function isCssSubpage() {
 825                 return ( Namespace::getUser() == $this->mNamespace and preg_match("/\\.css$/", $this->mTextform ) );
 826         }
 827         /**
 828          * Is this a .js subpage of a user page?
 829          * @return bool
 830          * @access public
 831          */
 832         function isJsSubpage() {
 833                 return ( Namespace::getUser() == $this->mNamespace and preg_match("/\\.js$/", $this->mTextform ) );
 834         }
 835         /**
 836          * Protect css/js subpages of user pages: can $wgUser edit
 837          * this page?
 838          *
 839          * @return boolean
 840          * @todo XXX: this might be better using restrictions
 841          * @access public
 842          */
 843         function userCanEditCssJsSubpage() {
 844                 global $wgUser;
 845                 return ( $wgUser->isSysop() or preg_match('/^'.preg_quote($wgUser->getName()).'/', $this->mTextform) );
 846         }
 847
 848         /**
 849          * Accessor/initialisation for mRestrictions
 850          * @return array the array of groups allowed to edit this article
 851          * @access public
 852          */
 853         function getRestrictions() {
 854                 $id = $this->getArticleID();
 855                 if ( 0 == $id ) { return array(); }
 856
 857                 if ( ! $this->mRestrictionsLoaded ) {
 858                         $dbr =& wfGetDB( DB_SLAVE );
 859                         $res = $dbr->getField( 'cur', 'cur_restrictions', 'cur_id='.$id );
 860                         $this->mRestrictions = explode( ',', trim( $res ) );
 861                         $this->mRestrictionsLoaded = true;
 862                 }
 863                 return $this->mRestrictions;
 864         }
 865
 866         /**
 867          * Is there a version of this page in the deletion archive?
 868          * @return int the number of archived revisions
 869          * @access public
 870          */
 871         function isDeleted() {
 872                 $fname = 'Title::isDeleted';
 873                 $dbr =& wfGetDB( DB_SLAVE );
 874                 $n = $dbr->getField( 'archive', 'COUNT(*)', array( 'ar_namespace' => $this->getNamespace(),
 875                         'ar_title' => $this->getDBkey() ), $fname );
 876                 return (int)$n;
 877         }
 878
 879         /**
 880          * Get the article ID for this Title from the link cache,
 881          * adding it if necessary
 882          * @param int $flags a bit field; may be GAID_FOR_UPDATE to select
 883          *      for update
 884          * @return int the ID
 885          * @access public
 886          */
 887         function getArticleID( $flags = 0 ) {
 888                 global $wgLinkCache;
 889
 890                 if ( $flags & GAID_FOR_UPDATE ) {
 891                         $oldUpdate = $wgLinkCache->forUpdate( true );
 892                         $this->mArticleID = $wgLinkCache->addLinkObj( $this );
 893                         $wgLinkCache->forUpdate( $oldUpdate );
 894                 } else {
 895                         if ( -1 == $this->mArticleID ) {
 896                                 $this->mArticleID = $wgLinkCache->addLinkObj( $this );
 897                         }
 898                 }
 899                 return $this->mArticleID;
 900         }
 901
 902         /**
 903          * This clears some fields in this object, and clears any associated
 904          * keys in the "bad links" section of $wgLinkCache.
 905          *
 906          * - This is called from Article::insertNewArticle() to allow
 907          * loading of the new cur_id. It's also called from
 908          * Article::doDeleteArticle()
 909          *
 910          * @param int $newid the new Article ID
 911          * @access public
 912          */
 913         function resetArticleID( $newid ) {
 914                 global $wgLinkCache;
 915                 $wgLinkCache->clearBadLink( $this->getPrefixedDBkey() );
 916
 917                 if ( 0 == $newid ) { $this->mArticleID = -1; }
 918                 else { $this->mArticleID = $newid; }
 919                 $this->mRestrictionsLoaded = false;
 920                 $this->mRestrictions = array();
 921         }
 922
 923         /**
 924          * Updates cur_touched for this page; called from LinksUpdate.php
 925          * @return bool true if the update succeded
 926          * @access public
 927          */
 928         function invalidateCache() {
 929                 $now = wfTimestampNow();
 930                 $dbw =& wfGetDB( DB_MASTER );
 931                 $success = $dbw->updateArray( 'cur',
 932                         array( /* SET */
 933                                 'cur_touched' => $dbw->timestamp()
 934                         ), array( /* WHERE */
 935                                 'cur_namespace' => $this->getNamespace() ,
 936                                 'cur_title' => $this->getDBkey()
 937                         ), 'Title::invalidateCache'
 938                 );
 939                 return $success;
 940         }
 941
 942         /**
 943          * Prefix some arbitrary text with the namespace or interwiki prefix
 944          * of this object
 945          *
 946          * @param string $name the text
 947          * @return string the prefixed text
 948          * @access private
 949          */
 950         /* private */ function prefix( $name ) {
 951                 global $wgContLang;
 952
 953                 $p = '';
 954                 if ( '' != $this->mInterwiki ) {
 955                         $p = $this->mInterwiki . ':';
 956                 }
 957                 if ( 0 != $this->mNamespace ) {
 958                         $p .= $wgContLang->getNsText( $this->mNamespace ) . ':';
 959                 }
 960                 return $p . $name;
 961         }
 962
 963         /**
 964          * Secure and split - main initialisation function for this object
 965          *
 966          * Assumes that mDbkeyform has been set, and is urldecoded
 967          * and uses underscores, but not otherwise munged.  This function
 968          * removes illegal characters, splits off the interwiki and
 969          * namespace prefixes, sets the other forms, and canonicalizes
 970          * everything.
 971          * @return bool true on success
 972          * @access private
 973          */
 974         /* private */ function secureAndSplit()
 975         {
 976                 global $wgContLang, $wgLocalInterwiki, $wgCapitalLinks;
 977                 $fname = 'Title::secureAndSplit';
 978                 wfProfileIn( $fname );
 979
 980                 static $imgpre = false;
 981                 static $rxTc = false;
 982
 983                 # Initialisation
 984                 if ( $imgpre === false ) {
 985                         $imgpre = ':' . $wgContLang->getNsText( Namespace::getImage() ) . ':';
 986                         # % is needed as well
 987                         $rxTc = '/[^' . Title::legalChars() . ']/';
 988                 }
 989
 990                 $this->mInterwiki = $this->mFragment = '';
 991                 $this->mNamespace = $this->mDefaultNamespace; # Usually NS_MAIN
 992
 993                 # Clean up whitespace
 994                 #
 995                 $t = preg_replace( "/[\\s_]+/", '_', $this->mDbkeyform );
 996                 $t = preg_replace( '/^_*(.*?)_*$/', '$1', $t );
 997
 998                 if ( '' == $t ) {
 999                         wfProfileOut( $fname );
1000                         return false;
1001                 }
1002
1003                 global $wgUseLatin1;
1004                 if( !$wgUseLatin1 &&  false !== strpos( $t, UTF8_REPLACEMENT ) ) {
1005                         # Contained illegal UTF-8 sequences or forbidden Unicode chars.
1006                         wfProfileOut( $fname );
1007                         return false;
1008                 }
1009
1010                 $this->mDbkeyform = $t;
1011                 $done = false;
1012
1013                 # :Image: namespace
1014                 if ( 0 == strncasecmp( $imgpre, $t, strlen( $imgpre ) ) ) {
1015                         $t = substr( $t, 1 );
1016                 }
1017
1018                 # Initial colon indicating main namespace
1019                 if ( ':' == $t{0} ) {
1020                         $r = substr( $t, 1 );
1021                         $this->mNamespace = NS_MAIN;
1022                 } else {
1023                         # Namespace or interwiki prefix
1024                         if ( preg_match( "/^(.+?)_*:_*(.*)$/", $t, $m ) ) {
1025                                 #$p = strtolower( $m[1] );
1026                                 $p = $m[1];
1027                                 $lowerNs = strtolower( $p );
1028                                 if ( $ns = Namespace::getCanonicalIndex( $lowerNs ) ) {
1029                                         # Canonical namespace
1030                                         $t = $m[2];
1031                                         $this->mNamespace = $ns;
1032                                 } elseif ( $ns = $wgContLang->getNsIndex( $lowerNs )) {
1033                                         # Ordinary namespace
1034                                         $t = $m[2];
1035                                         $this->mNamespace = $ns;
1036                                 } elseif ( $this->getInterwikiLink( $p ) ) {
1037                                         # Interwiki link
1038                                         $t = $m[2];
1039                                         $this->mInterwiki = $p;
1040
1041                                         if ( !preg_match( "/^([A-Za-z0-9_\\x80-\\xff]+):(.*)$/", $t, $m ) ) {
1042                                                 $done = true;
1043                                         } elseif($this->mInterwiki != $wgLocalInterwiki) {
1044                                                 $done = true;
1045                                         }
1046                                 }
1047                         }
1048                         $r = $t;
1049                 }
1050
1051                 # Redundant interwiki prefix to the local wiki
1052                 if ( 0 == strcmp( $this->mInterwiki, $wgLocalInterwiki ) ) {
1053                         $this->mInterwiki = '';
1054                 }
1055                 # We already know that some pages won't be in the database!
1056                 #
1057                 if ( '' != $this->mInterwiki || -1 == $this->mNamespace ) {
1058                         $this->mArticleID = 0;
1059                 }
1060                 $f = strstr( $r, '#' );
1061                 if ( false !== $f ) {
1062                         $this->mFragment = substr( $f, 1 );
1063                         $r = substr( $r, 0, strlen( $r ) - strlen( $f ) );
1064                         # remove whitespace again: prevents "Foo_bar_#"
1065                         # becoming "Foo_bar_"
1066                         $r = preg_replace( '/_*$/', '', $r );
1067                 }
1068
1069                 # Reject illegal characters.
1070                 #
1071                 if( preg_match( $rxTc, $r ) ) {
1072                         wfProfileOut( $fname );
1073                         return false;
1074                 }
1075
1076                 # "." and ".." conflict with the directories of those namesa
1077                 if ( strpos( $r, '.' ) !== false &&
1078                      ( $r === '.' || $r === '..' ||
1079                        strpos( $r, './' ) === 0  ||
1080                        strpos( $r, '../' ) === 0 ||
1081                        strpos( $r, '/./' ) !== false ||
1082                        strpos( $r, '/../' ) !== false ) )
1083                 {
1084                         wfProfileOut( $fname );
1085                         return false;
1086                 }
1087
1088                 # Initial capital letter
1089                 if( $wgCapitalLinks && $this->mInterwiki == '') {
1090                         $t = $wgContLang->ucfirst( $r );
1091                 } else {
1092                         $t = $r;
1093                 }
1094
1095                 # Fill fields
1096                 $this->mDbkeyform = $t;
1097                 $this->mUrlform = wfUrlencode( $t );
1098
1099                 $this->mTextform = str_replace( '_', ' ', $t );
1100
1101                 wfProfileOut( $fname );
1102                 return true;
1103         }
1104
1105         /**
1106          * Get a Title object associated with the talk page of this article
1107          * @return Title the object for the talk page
1108          * @access public
1109          */
1110         function getTalkPage() {
1111                 return Title::makeTitle( Namespace::getTalk( $this->getNamespace() ), $this->getDBkey() );
1112         }
1113
1114         /**
1115          * Get a title object associated with the subject page of this
1116          * talk page
1117          *
1118          * @return Title the object for the subject page
1119          * @access public
1120          */
1121         function getSubjectPage() {
1122                 return Title::makeTitle( Namespace::getSubject( $this->getNamespace() ), $this->getDBkey() );
1123         }
1124
1125         /**
1126          * Get an array of Title objects linking to this Title
1127          * - Also stores the IDs in the link cache.
1128          *
1129          * @param string $options may be FOR UPDATE
1130          * @return array the Title objects linking here
1131          * @access public
1132          */
1133         function getLinksTo( $options = '' ) {
1134                 global $wgLinkCache;
1135                 $id = $this->getArticleID();
1136
1137                 if ( $options ) {
1138                         $db =& wfGetDB( DB_MASTER );
1139                 } else {
1140                         $db =& wfGetDB( DB_SLAVE );
1141                 }
1142                 $cur = $db->tableName( 'cur' );
1143                 $links = $db->tableName( 'links' );
1144
1145                 $sql = "SELECT cur_namespace,cur_title,cur_id FROM $cur,$links WHERE l_from=cur_id AND l_to={$id} $options";
1146                 $res = $db->query( $sql, 'Title::getLinksTo' );
1147                 $retVal = array();
1148                 if ( $db->numRows( $res ) ) {
1149                         while ( $row = $db->fetchObject( $res ) ) {
1150                                 if ( $titleObj = Title::makeTitle( $row->cur_namespace, $row->cur_title ) ) {
1151                                         $wgLinkCache->addGoodLink( $row->cur_id, $titleObj->getPrefixedDBkey() );
1152                                         $retVal[] = $titleObj;
1153                                 }
1154                         }
1155                 }
1156                 $db->freeResult( $res );
1157                 return $retVal;
1158         }
1159
1160         /**
1161          * Get an array of Title objects linking to this non-existent title.
1162          * - Also stores the IDs in the link cache.
1163          *
1164          * @param string $options may be FOR UPDATE
1165          * @return array the Title objects linking here
1166          * @access public
1167          */
1168         function getBrokenLinksTo( $options = '' ) {
1169                 global $wgLinkCache;
1170
1171                 if ( $options ) {
1172                         $db =& wfGetDB( DB_MASTER );
1173                 } else {
1174                         $db =& wfGetDB( DB_SLAVE );
1175                 }
1176                 $cur = $db->tableName( 'cur' );
1177                 $brokenlinks = $db->tableName( 'brokenlinks' );
1178                 $encTitle = $db->strencode( $this->getPrefixedDBkey() );
1179
1180                 $sql = "SELECT cur_namespace,cur_title,cur_id FROM $brokenlinks,$cur " .
1181                   "WHERE bl_from=cur_id AND bl_to='$encTitle' $options";
1182                 $res = $db->query( $sql, "Title::getBrokenLinksTo" );
1183                 $retVal = array();
1184                 if ( $db->numRows( $res ) ) {
1185                         while ( $row = $db->fetchObject( $res ) ) {
1186                                 $titleObj = Title::makeTitle( $row->cur_namespace, $row->cur_title );
1187                                 $wgLinkCache->addGoodLink( $row->cur_id, $titleObj->getPrefixedDBkey() );
1188                                 $retVal[] = $titleObj;
1189                         }
1190                 }
1191                 $db->freeResult( $res );
1192                 return $retVal;
1193         }
1194
1195         /**
1196          * Get a list of URLs to purge from the Squid cache when this
1197          * page changes
1198          *
1199          * @return array the URLs
1200          * @access public
1201          */
1202         function getSquidURLs() {
1203                 return array(
1204                         $this->getInternalURL(),
1205                         $this->getInternalURL( 'action=history' )
1206                 );
1207         }
1208
1209         /**
1210          * Move this page without authentication
1211          * @param Title &$nt the new page Title
1212          * @access public
1213          */
1214         function moveNoAuth( &$nt ) {
1215                 return $this->moveTo( $nt, false );
1216         }
1217
1218         /**
1219          * Move a title to a new location
1220          * @param Title &$nt the new title
1221          * @param bool $auth indicates whether $wgUser's permissions
1222          *      should be checked
1223          * @return mixed true on success, message name on failure
1224          * @access public
1225          */
1226         function moveTo( &$nt, $auth = true ) {
1227                 if( !$this or !$nt ) {
1228                         return 'badtitletext';
1229                 }
1230
1231                 $fname = 'Title::move';
1232                 $oldid = $this->getArticleID();
1233                 $newid = $nt->getArticleID();
1234
1235                 if ( strlen( $nt->getDBkey() ) < 1 ) {
1236                         return 'articleexists';
1237                 }
1238                 if ( ( ! Namespace::isMovable( $this->getNamespace() ) ) ||
1239                          ( '' == $this->getDBkey() ) ||
1240                          ( '' != $this->getInterwiki() ) ||
1241                          ( !$oldid ) ||
1242                      ( ! Namespace::isMovable( $nt->getNamespace() ) ) ||
1243                          ( '' == $nt->getDBkey() ) ||
1244                          ( '' != $nt->getInterwiki() ) ) {
1245                         return 'badarticleerror';
1246                 }
1247
1248                 if ( $auth && ( !$this->userCanEdit() || !$nt->userCanEdit() ) ) {
1249                         return 'protectedpage';
1250                 }
1251
1252                 # The move is allowed only if (1) the target doesn't exist, or
1253                 # (2) the target is a redirect to the source, and has no history
1254                 # (so we can undo bad moves right after they're done).
1255
1256                 if ( 0 != $newid ) { # Target exists; check for validity
1257                         if ( ! $this->isValidMoveTarget( $nt ) ) {
1258                                 return 'articleexists';
1259                         }
1260                         $this->moveOverExistingRedirect( $nt );
1261                 } else { # Target didn't exist, do normal move.
1262                         $this->moveToNewTitle( $nt, $newid );
1263                 }
1264
1265                 # Fixing category links (those without piped 'alternate' names) to be sorted under the new title
1266
1267                 $dbw =& wfGetDB( DB_MASTER );
1268                 $sql = "UPDATE categorylinks SET cl_sortkey=" . $dbw->addQuotes( $nt->getPrefixedText() ) .
1269                         " WHERE cl_from=" . $dbw->addQuotes( $this->getArticleID() ) .
1270                         " AND cl_sortkey=" . $dbw->addQuotes( $this->getPrefixedText() );
1271                 $dbw->query( $sql, 'SpecialMovepage::doSubmit' );
1272
1273                 # Update watchlists
1274
1275                 $oldnamespace = $this->getNamespace() & ~1;
1276                 $newnamespace = $nt->getNamespace() & ~1;
1277                 $oldtitle = $this->getDBkey();
1278                 $newtitle = $nt->getDBkey();
1279
1280                 if( $oldnamespace != $newnamespace || $oldtitle != $newtitle ) {
1281                         WatchedItem::duplicateEntries( $this, $nt );
1282                 }
1283
1284                 # Update search engine
1285                 $u = new SearchUpdate( $oldid, $nt->getPrefixedDBkey() );
1286                 $u->doUpdate();
1287                 $u = new SearchUpdate( $newid, $this->getPrefixedDBkey(), '' );
1288                 $u->doUpdate();
1289
1290                 return true;
1291         }
1292
1293         /**
1294          * Move page to a title which is at present a redirect to the
1295          * source page
1296          *
1297          * @param Title &$nt the page to move to, which should currently
1298          *      be a redirect
1299          * @access private
1300          */
1301         /* private */ function moveOverExistingRedirect( &$nt ) {
1302                 global $wgUser, $wgLinkCache, $wgUseSquid, $wgMwRedir;
1303                 $fname = 'Title::moveOverExistingRedirect';
1304                 $comment = wfMsg( '1movedto2', $this->getPrefixedText(), $nt->getPrefixedText() );
1305
1306                 $now = wfTimestampNow();
1307                 $won = wfInvertTimestamp( $now );
1308                 $newid = $nt->getArticleID();
1309                 $oldid = $this->getArticleID();
1310                 $dbw =& wfGetDB( DB_MASTER );
1311                 $links = $dbw->tableName( 'links' );
1312
1313                 # Change the name of the target page:
1314                 $dbw->updateArray( 'cur',
1315                         /* SET */ array(
1316                                 'cur_touched' => $dbw->timestamp($now),
1317                                 'cur_namespace' => $nt->getNamespace(),
1318                                 'cur_title' => $nt->getDBkey()
1319                         ),
1320                         /* WHERE */ array( 'cur_id' => $oldid ),
1321                         $fname
1322                 );
1323                 $wgLinkCache->clearLink( $nt->getPrefixedDBkey() );
1324
1325                 # Repurpose the old redirect. We don't save it to history since
1326                 # by definition if we've got here it's rather uninteresting.
1327
1328                 $redirectText = $wgMwRedir->getSynonym( 0 ) . ' [[' . $nt->getPrefixedText() . "]]\n";
1329                 $dbw->updateArray( 'cur',
1330                         /* SET */ array(
1331                                 'cur_touched' => $dbw->timestamp($now),
1332                                 'cur_timestamp' => $dbw->timestamp($now),
1333                                 'inverse_timestamp' => $won,
1334                                 'cur_namespace' => $this->getNamespace(),
1335                                 'cur_title' => $this->getDBkey(),
1336                                 'cur_text' => $wgMwRedir->getSynonym( 0 ) . ' [[' . $nt->getPrefixedText() . "]]\n",
1337                                 'cur_comment' => $comment,
1338                                 'cur_user' => $wgUser->getID(),
1339                                 'cur_minor_edit' => 0,
1340                                 'cur_counter' => 0,
1341                                 'cur_restrictions' => '',
1342                                 'cur_user_text' => $wgUser->getName(),
1343                                 'cur_is_redirect' => 1,
1344                                 'cur_is_new' => 1
1345                         ),
1346                         /* WHERE */ array( 'cur_id' => $newid ),
1347                         $fname
1348                 );
1349
1350                 $wgLinkCache->clearLink( $this->getPrefixedDBkey() );
1351
1352                 # Fix the redundant names for the past revisions of the target page.
1353                 # The redirect should have no old revisions.
1354                 $dbw->updateArray(
1355                         /* table */ 'old',
1356                         /* SET */ array(
1357                                 'old_namespace' => $nt->getNamespace(),
1358                                 'old_title' => $nt->getDBkey(),
1359                         ),
1360                         /* WHERE */ array(
1361                                 'old_namespace' => $this->getNamespace(),
1362                                 'old_title' => $this->getDBkey(),
1363                         ),
1364                         $fname
1365                 );
1366
1367                 RecentChange::notifyMoveOverRedirect( $now, $this, $nt, $wgUser, $comment );
1368
1369                 # Swap links
1370
1371                 # Load titles and IDs
1372                 $linksToOld = $this->getLinksTo( 'FOR UPDATE' );
1373                 $linksToNew = $nt->getLinksTo( 'FOR UPDATE' );
1374
1375                 # Delete them all
1376                 $sql = "DELETE FROM $links WHERE l_to=$oldid OR l_to=$newid";
1377                 $dbw->query( $sql, $fname );
1378
1379                 # Reinsert
1380                 if ( count( $linksToOld ) || count( $linksToNew )) {
1381                         $sql = "INSERT INTO $links (l_from,l_to) VALUES ";
1382                         $first = true;
1383
1384                         # Insert links to old title
1385                         foreach ( $linksToOld as $linkTitle ) {
1386                                 if ( $first ) {
1387                                         $first = false;
1388                                 } else {
1389                                         $sql .= ',';
1390                                 }
1391                                 $id = $linkTitle->getArticleID();
1392                                 $sql .= "($id,$newid)";
1393                         }
1394
1395                         # Insert links to new title
1396                         foreach ( $linksToNew as $linkTitle ) {
1397                                 if ( $first ) {
1398                                         $first = false;
1399                                 } else {
1400                                         $sql .= ',';
1401                                 }
1402                                 $id = $linkTitle->getArticleID();
1403                                 $sql .= "($id, $oldid)";
1404                         }
1405
1406                         $dbw->query( $sql, DB_MASTER, $fname );
1407                 }
1408
1409                 # Now, we record the link from the redirect to the new title.
1410                 # It should have no other outgoing links...
1411                 $dbw->delete( 'links', array( 'l_from' => $newid ) );
1412                 $dbw->insertArray( 'links', array( 'l_from' => $newid, 'l_to' => $oldid ) );
1413
1414                 # Clear linkscc
1415                 LinkCache::linksccClearLinksTo( $oldid );
1416                 LinkCache::linksccClearLinksTo( $newid );
1417
1418                 # Purge squid
1419                 if ( $wgUseSquid ) {
1420                         $urls = array_merge( $nt->getSquidURLs(), $this->getSquidURLs() );
1421                         $u = new SquidUpdate( $urls );
1422                         $u->doUpdate();
1423                 }
1424         }
1425
1426         /**
1427          * Move page to non-existing title.
1428          * @param Title &$nt the new Title
1429          * @param int &$newid set to be the new article ID
1430          * @access private
1431          */
1432         /* private */ function moveToNewTitle( &$nt, &$newid ) {
1433                 global $wgUser, $wgLinkCache, $wgUseSquid;
1434                 $fname = 'MovePageForm::moveToNewTitle';
1435                 $comment = wfMsg( '1movedto2', $this->getPrefixedText(), $nt->getPrefixedText() );
1436
1437                 $newid = $nt->getArticleID();
1438                 $oldid = $this->getArticleID();
1439                 $dbw =& wfGetDB( DB_MASTER );
1440                 $now = $dbw->timestamp();
1441                 $won = wfInvertTimestamp( wfTimestamp(TS_MW,$now) );
1442                 wfSeedRandom();
1443                 $rand = number_format( mt_rand() / mt_getrandmax(), 12, '.', '' );
1444
1445                 # Rename cur entry
1446                 $dbw->updateArray( 'cur',
1447                         /* SET */ array(
1448                                 'cur_touched' => $now,
1449                                 'cur_namespace' => $nt->getNamespace(),
1450                                 'cur_title' => $nt->getDBkey()
1451                         ),
1452                         /* WHERE */ array( 'cur_id' => $oldid ),
1453                         $fname
1454                 );
1455
1456                 $wgLinkCache->clearLink( $nt->getPrefixedDBkey() );
1457
1458                 # Insert redirect
1459                 $dbw->insertArray( 'cur', array(
1460                         'cur_id' => $dbw->nextSequenceValue('cur_cur_id_seq'),
1461                         'cur_namespace' => $this->getNamespace(),
1462                         'cur_title' => $this->getDBkey(),
1463                         'cur_comment' => $comment,
1464                         'cur_user' => $wgUser->getID(),
1465                         'cur_user_text' => $wgUser->getName(),
1466                         'cur_timestamp' => $now,
1467                         'inverse_timestamp' => $won,
1468                         'cur_touched' => $now,
1469                         'cur_is_redirect' => 1,
1470                         'cur_random' => $rand,
1471                         'cur_is_new' => 1,
1472                         'cur_text' => "#REDIRECT [[" . $nt->getPrefixedText() . "]]\n" ), $fname
1473                 );
1474                 $newid = $dbw->insertId();
1475                 $wgLinkCache->clearLink( $this->getPrefixedDBkey() );
1476
1477                 # Rename old entries
1478                 $dbw->updateArray(
1479                         /* table */ 'old',
1480                         /* SET */ array(
1481                                 'old_namespace' => $nt->getNamespace(),
1482                                 'old_title' => $nt->getDBkey()
1483                         ),
1484                         /* WHERE */ array(
1485                                 'old_namespace' => $this->getNamespace(),
1486                                 'old_title' => $this->getDBkey()
1487                         ), $fname
1488                 );
1489
1490                 # Record in RC
1491                 RecentChange::notifyMoveToNew( $now, $this, $nt, $wgUser, $comment );
1492
1493                 # Purge squid and linkscc as per article creation
1494                 Article::onArticleCreate( $nt );
1495
1496                 # Any text links to the old title must be reassigned to the redirect
1497                 $dbw->updateArray( 'links', array( 'l_to' => $newid ), array( 'l_to' => $oldid ), $fname );
1498                 LinkCache::linksccClearLinksTo( $oldid );
1499
1500                 # Record the just-created redirect's linking to the page
1501                 $dbw->insertArray( 'links', array( 'l_from' => $newid, 'l_to' => $oldid ), $fname );
1502
1503                 # Non-existent target may have had broken links to it; these must
1504                 # now be removed and made into good links.
1505                 $update = new LinksUpdate( $oldid, $nt->getPrefixedDBkey() );
1506                 $update->fixBrokenLinks();
1507
1508                 # Purge old title from squid
1509                 # The new title, and links to the new title, are purged in Article::onArticleCreate()
1510                 $titles = $nt->getLinksTo();
1511                 if ( $wgUseSquid ) {
1512                         $urls = $this->getSquidURLs();
1513                         foreach ( $titles as $linkTitle ) {
1514                                 $urls[] = $linkTitle->getInternalURL();
1515                         }
1516                         $u = new SquidUpdate( $urls );
1517                         $u->doUpdate();
1518                 }
1519         }
1520
1521         /**
1522          * Checks if $this can be moved to a given Title
1523          * - Selects for update, so don't call it unless you mean business
1524          *
1525          * @param Title &$nt the new title to check
1526          * @access public
1527          */
1528         function isValidMoveTarget( $nt ) {
1529                 $fname = 'Title::isValidMoveTarget';
1530                 $dbw =& wfGetDB( DB_MASTER );
1531
1532                 # Is it a redirect?
1533                 $id  = $nt->getArticleID();
1534                 $obj = $dbw->getArray( 'cur', array( 'cur_is_redirect','cur_text' ),
1535                         array( 'cur_id' => $id ), $fname, 'FOR UPDATE' );
1536
1537                 if ( !$obj || 0 == $obj->cur_is_redirect ) {
1538                         # Not a redirect
1539                         return false;
1540                 }
1541
1542                 # Does the redirect point to the source?
1543                 if ( preg_match( "/\\[\\[\\s*([^\\]\\|]*)]]/", $obj->cur_text, $m ) ) {
1544                         $redirTitle = Title::newFromText( $m[1] );
1545                         if( !is_object( $redirTitle ) ||
1546                                 $redirTitle->getPrefixedDBkey() != $this->getPrefixedDBkey() ) {
1547                                 return false;
1548                         }
1549                 }
1550
1551                 # Does the article have a history?
1552                 $row = $dbw->getArray( 'old', array( 'old_id' ),
1553                         array(
1554                                 'old_namespace' => $nt->getNamespace(),
1555                                 'old_title' => $nt->getDBkey()
1556                         ), $fname, 'FOR UPDATE'
1557                 );
1558
1559                 # Return true if there was no history
1560                 return $row === false;
1561         }
1562
1563         /**
1564          * Create a redirect; fails if the title already exists; does
1565          * not notify RC
1566          *
1567          * @param Title $dest the destination of the redirect
1568          * @param string $comment the comment string describing the move
1569          * @return bool true on success
1570          * @access public
1571          */
1572         function createRedirect( $dest, $comment ) {
1573                 global $wgUser;
1574                 if ( $this->getArticleID() ) {
1575                         return false;
1576                 }
1577
1578                 $fname = 'Title::createRedirect';
1579                 $dbw =& wfGetDB( DB_MASTER );
1580                 $now = wfTimestampNow();
1581                 $won = wfInvertTimestamp( $now );
1582                 $seqVal = $dbw->nextSequenceValue( 'cur_cur_id_seq' );
1583
1584                 $dbw->insertArray( 'cur', array(
1585                         'cur_id' => $seqVal,
1586                         'cur_namespace' => $this->getNamespace(),
1587                         'cur_title' => $this->getDBkey(),
1588                         'cur_comment' => $comment,
1589                         'cur_user' => $wgUser->getID(),
1590                         'cur_user_text' => $wgUser->getName(),
1591                         'cur_timestamp' => $now,
1592                         'inverse_timestamp' => $won,
1593                         'cur_touched' => $now,
1594                         'cur_is_redirect' => 1,
1595                         'cur_is_new' => 1,
1596                         'cur_text' => "#REDIRECT [[" . $dest->getPrefixedText() . "]]\n"
1597                 ), $fname );
1598                 $newid = $dbw->insertId();
1599                 $this->resetArticleID( $newid );
1600
1601                 # Link table
1602                 if ( $dest->getArticleID() ) {
1603                         $dbw->insertArray( 'links',
1604                                 array(
1605                                         'l_to' => $dest->getArticleID(),
1606                                         'l_from' => $newid
1607                                 ), $fname
1608                         );
1609                 } else {
1610                         $dbw->insertArray( 'brokenlinks',
1611                                 array(
1612                                         'bl_to' => $dest->getPrefixedDBkey(),
1613                                         'bl_from' => $newid
1614                                 ), $fname
1615                         );
1616                 }
1617
1618                 Article::onArticleCreate( $this );
1619                 return true;
1620         }
1621
1622         /**
1623          * Get categories to which this Title belongs and return an array of
1624          * categories' names.
1625          *
1626          * @return array an array of parents in the form:
1627          *      $parent => $currentarticle
1628          * @access public
1629          */
1630         function getParentCategories() {
1631                 global $wgContLang,$wgUser;
1632
1633                 $titlekey = $this->getArticleId();
1634                 $sk =& $wgUser->getSkin();
1635                 $parents = array();
1636                 $dbr =& wfGetDB( DB_SLAVE );
1637                 $cur = $dbr->tableName( 'cur' );
1638                 $categorylinks = $dbr->tableName( 'categorylinks' );
1639
1640                 # NEW SQL
1641                 $sql = "SELECT * FROM categorylinks"
1642                      ." WHERE cl_from='$titlekey'"
1643                          ." AND cl_from <> '0'"
1644                          ." ORDER BY cl_sortkey";
1645
1646                 $res = $dbr->query ( $sql ) ;
1647
1648                 if($dbr->numRows($res) > 0) {
1649                         while ( $x = $dbr->fetchObject ( $res ) )
1650                                 //$data[] = Title::newFromText($wgContLang->getNSText ( NS_CATEGORY ).':'.$x->cl_to);
1651                                 $data[$wgContLang->getNSText ( NS_CATEGORY ).':'.$x->cl_to] = $this->getFullText();
1652                         $dbr->freeResult ( $res ) ;
1653                 } else {
1654                         $data = '';
1655                 }
1656                 return $data;
1657         }
1658
1659         /**
1660          * Go through all parent categories of this Title
1661          * @return array
1662          * @access public
1663          */
1664         function getCategorieBrowser() {
1665                 $parents = $this->getParentCategories();
1666
1667                 if($parents != '') {
1668                         foreach($parents as $parent => $current)
1669                         {
1670                                 $nt = Title::newFromText($parent);
1671                                 $stack[$parent] = $nt->getCategorieBrowser();
1672                         }
1673                         return $stack;
1674                 } else {
1675                         return array();
1676                 }
1677         }
1678
1679
1680         /**
1681          * Get an associative array for selecting this title from
1682          * the "cur" table
1683          *
1684          * @return array
1685          * @access public
1686          */
1687         function curCond() {
1688                 return array( 'cur_namespace' => $this->mNamespace, 'cur_title' => $this->mDbkeyform );
1689         }
1690
1691         /**
1692          * Get an associative array for selecting this title from the
1693          * "old" table
1694          *
1695          * @return array
1696          * @access public
1697          */
1698         function oldCond() {
1699                 return array( 'old_namespace' => $this->mNamespace, 'old_title' => $this->mDbkeyform );
1700         }
1701 }
1702 ?>