includes/Title.php

   1 <?
   2 # See title.doc
   3
   4 class Title {
   5         /* private */ var $mTextform, $mUrlform, $mDbkeyform;
   6         /* private */ var $mNamespace, $mInterwiki, $mFragment;
   7         /* private */ var $mArticleID, $mRestrictions, $mRestrictionsLoaded;
   8
   9         /* private */ function Title()
  10         {
  11                 $this->mInterwiki = $this->mUrlform =
  12                 $this->mTextform = $this->mDbkeyform = "";
  13                 $this->mArticleID = -1;
  14                 $this->mNamespace = 0;
  15                 $this->mRestrictionsLoaded = false;
  16                 $this->mRestrictions = array();
  17         }
  18
  19         # Static factory methods
  20         #
  21         function newFromDBkey( $key )
  22         {
  23                 $t = new Title();
  24                 $t->mDbkeyform = $key;
  25                 $t->secureAndSplit();
  26                 return $t;
  27         }
  28
  29         function newFromText( $text )
  30         {
  31                 wfProfileIn( "Title::newFromText" );
  32
  33                 # Note - mixing latin1 named entities and unicode numbered
  34                 # ones will result in a bad link.
  35                 $trans = get_html_translation_table( HTML_ENTITIES );
  36                 $trans = array_flip( $trans );
  37                 $text = strtr( $text, $trans );
  38
  39                 $text = wfMungeToUtf8( $text );
  40
  41                 $text = urldecode( $text );
  42
  43                 $t = new Title();
  44                 $t->mDbkeyform = str_replace( " ", "_", $text );
  45                 $t->secureAndSplit();
  46
  47                 wfProfileOut();
  48                 return $t;
  49         }
  50
  51         function newFromURL( $url )
  52         {
  53                 global $wgLang, $wgServer, $HTTP_SERVER_VARS;
  54
  55                 $t = new Title();
  56                 $s = urldecode( $url ); # This is technically wrong, as anything
  57                                                                 # we've gotten is already decoded by PHP.
  58                                                                 # Kept for backwards compatibility with
  59                                                                 # buggy URLs we had for a while...
  60
  61                 # For links that came from outside, check for alternate/legacy
  62                 # character encoding.
  63                 if( strncmp($wgServer, $HTTP_SERVER_VARS["HTTP_REFERER"], strlen( $wgServer ) ) )
  64                         $s = $wgLang->checkTitleEncoding( $s );
  65
  66                 $t->mDbkeyform = str_replace( " ", "_", $s );
  67                 $t->secureAndSplit();
  68                 return $t;
  69         }
  70
  71         function nameOf( $id )
  72         {
  73                 $sql = "SELECT cur_namespace,cur_title FROM cur WHERE " .
  74                   "cur_id={$id}";
  75                 $res = wfQuery( $sql, DB_READ, "Article::nameOf" );
  76                 if ( 0 == wfNumRows( $res ) ) { return NULL; }
  77
  78                 $s = wfFetchObject( $res );
  79                 $n = Title::makeName( $s->cur_namespace, $s->cur_title );
  80                 return $n;
  81         }
  82
  83
  84         function legalChars()
  85         {
  86                 global $wgInputEncoding;
  87                 if( $wgInputEncoding == "utf-8" ) {
  88                         return "-,.()' &;%!?_0-9A-Za-z\\/:\\x80-\\xFF";
  89                 } else {
  90                         # ISO 8859-* don't allow 0x80-0x9F
  91                         #return "-,.()' &;%!?_0-9A-Za-z\\/:\\xA0-\\xFF";
  92                         # But that breaks interlanguage links at the moment. Temporary:
  93                         return "-,.()' &;%!?_0-9A-Za-z\\/:\\x80-\\xFF";
  94                 }
  95         }
  96
  97         function getInterwikiLink( $key )
  98         {
  99                 global $wgMemc, $wgDBname;
 100                 $k = "$wgDBname:interwiki:$key";
 101                 $s = $wgMemc->get( $k );
 102                 if( $s !== false ) return $s->iw_url;
 103
 104                 $dkey = wfStrencode( $key );
 105                 $query = "SELECT iw_url FROM interwiki WHERE iw_prefix='$dkey'";
 106                 $res = wfQuery( $query, DB_READ, "Title::getInterwikiLink" );
 107                 if(!$res) return "";
 108
 109                 $s = wfFetchObject( $res );
 110                 if(!$s) {
 111                         $s = (object)false;
 112                         $s->iw_url = "";
 113                 }
 114                 $wgMemc->set( $k, $s );
 115                 return $s->iw_url;
 116         }
 117
 118         function getText() { return $this->mTextform; }
 119         function getURL() { return $this->mUrlform; }
 120         function getDBkey() { return $this->mDbkeyform; }
 121         function getNamespace() { return $this->mNamespace; }
 122         function setNamespace( $n ) { $this->mNamespace = $n; }
 123         function getInterwiki() { return $this->mInterwiki; }
 124         function getFragment() { return $this->mFragment; }
 125
 126         /* static */ function indexTitle( $ns, $title )
 127         {
 128                 global $wgDBminWordLen, $wgLang;
 129
 130                 $lc = SearchEngine::legalSearchChars() . "&#;";
 131                 $t = $wgLang->stripForSearch( $title );
 132                 $t = preg_replace( "/[^{$lc}]+/", " ", $t );
 133                 $t = strtolower( $t );
 134
 135                 # Handle 's, s'
 136                 $t = preg_replace( "/([{$lc}]+)'s( |$)/", "\\1 \\1's ", $t );
 137                 $t = preg_replace( "/([{$lc}]+)s'( |$)/", "\\1s ", $t );
 138
 139                 $t = preg_replace( "/\\s+/", " ", $t );
 140
 141                 if ( $ns == Namespace::getImage() ) {
 142                         $t = preg_replace( "/ (png|gif|jpg|jpeg|ogg)$/", "", $t );
 143                 }
 144                 return trim( $t );
 145         }
 146
 147         function getIndexTitle()
 148         {
 149                 return Title::indexTitle( $this->mNamespace, $this->mTextform );
 150         }
 151
 152         /* static */ function makeName( $ns, $title )
 153         {
 154                 global $wgLang;
 155
 156                 $n = $wgLang->getNsText( $ns );
 157                 if ( "" == $n ) { return $title; }
 158                 else { return "{$n}:{$title}"; }
 159         }
 160
 161         /* static */ function makeTitle( $ns, $title )
 162         {
 163                 $t = new Title();
 164                 $t->mDbkeyform = Title::makeName( $ns, $title );
 165                 $t->secureAndSplit();
 166                 return $t;
 167         }
 168
 169         function getPrefixedDBkey()
 170         {
 171                 $s = $this->prefix( $this->mDbkeyform );
 172                 $s = str_replace( " ", "_", $s );
 173                 return $s;
 174         }
 175
 176         function getPrefixedText()
 177         {
 178                 $s = $this->prefix( $this->mTextform );
 179                 $s = str_replace( "_", " ", $s );
 180                 return $s;
 181         }
 182
 183         function getPrefixedURL()
 184         {
 185                 $s = $this->prefix( $this->mDbkeyform );
 186                 $s = str_replace( " ", "_", $s );
 187
 188                 $s = urlencode ( $s ) ;
 189                 # Cleaning up URL to make it look nice -- is this safe?
 190                 $s = preg_replace( "/%3[Aa]/", ":", $s );
 191                 $s = preg_replace( "/%2[Ff]/", "/", $s );
 192                 $s = str_replace( "%28", "(", $s );
 193                 $s = str_replace( "%29", ")", $s );
 194                 return $s;
 195         }
 196
 197         function getFullURL()
 198         {
 199                 global $wgLang, $wgArticlePath;
 200
 201                 if ( "" == $this->mInterwiki ) {
 202                         $p = $wgArticlePath;
 203                 } else {
 204                         $p = $this->getInterwikiLink( $this->mInterwiki );
 205                 }
 206                 $n = $wgLang->getNsText( $this->mNamespace );
 207                 if ( "" != $n ) { $n .= ":"; }
 208                 $u = str_replace( "$1", $n . $this->mUrlform, $p );
 209                 if ( "" != $this->mFragment ) {
 210                         $u .= "#" . $this->mFragment;
 211                 }
 212                 return $u;
 213         }
 214
 215         function getEditURL()
 216         {
 217                 global $wgServer, $wgScript;
 218
 219                 if ( "" != $this->mInterwiki ) { return ""; }
 220                 $s = wfLocalUrl( $this->getPrefixedURL(), "action=edit" );
 221
 222                 return $s;
 223         }
 224
 225         function isExternal() { return ( "" != $this->mInterwiki ); }
 226
 227         function isProtected()
 228         {
 229                 if ( -1 == $this->mNamespace ) { return true; }
 230                 $a = $this->getRestrictions();
 231                 if ( in_array( "sysop", $a ) ) { return true; }
 232                 return false;
 233         }
 234
 235         function isLog()
 236         {
 237                 if ( $this->mNamespace != Namespace::getWikipedia() ) {
 238                         return false;
 239                 }
 240                 if ( ( 0 == strcmp( wfMsg( "uploadlogpage" ), $this->mDbkeyform ) ) ||
 241                   ( 0 == strcmp( wfMsg( "dellogpage" ), $this->mDbkeyform ) ) ) {
 242                         return true;
 243                 }
 244                 return false;
 245         }
 246
 247         function userIsWatching()
 248         {
 249                 global $wgUser;
 250
 251                 if ( -1 == $this->mNamespace ) { return false; }
 252                 if ( 0 == $wgUser->getID() ) { return false; }
 253
 254                 return $wgUser->isWatched( $this );
 255         }
 256
 257         function userCanEdit()
 258         {
 259                 global $wgUser;
 260
 261                 if ( -1 == $this->mNamespace ) { return false; }
 262                 # if ( 0 == $this->getArticleID() ) { return false; }
 263                 if ( $this->mDbkeyform == "_" ) { return false; }
 264
 265                 $ur = $wgUser->getRights();
 266                 foreach ( $this->getRestrictions() as $r ) {
 267                         if ( "" != $r && ( ! in_array( $r, $ur ) ) ) {
 268                                 return false;
 269                         }
 270                 }
 271                 return true;
 272         }
 273
 274         function getRestrictions()
 275         {
 276                 $id = $this->getArticleID();
 277                 if ( 0 == $id ) { return array(); }
 278
 279                 if ( ! $this->mRestrictionsLoaded ) {
 280                         $res = wfGetSQL( "cur", "cur_restrictions", "cur_id=$id" );
 281                         $this->mRestrictions = explode( ",", trim( $res ) );
 282                         $this->mRestrictionsLoaded = true;
 283                 }
 284                 return $this->mRestrictions;
 285         }
 286
 287         function isDeleted() {
 288                 $ns = $this->getNamespace();
 289                 $t = wfStrencode( $this->getDBkey() );
 290                 $sql = "SELECT COUNT(*) AS n FROM archive WHERE ar_namespace=$ns AND ar_title='$t'";
 291                 if( $res = wfQuery( $sql, DB_READ ) ) {
 292                         $s = wfFetchObject( $res );
 293                         return $s->n;
 294                 }
 295                 return 0;
 296         }
 297
 298         function getArticleID()
 299         {
 300                 global $wgLinkCache;
 301
 302                 if ( -1 != $this->mArticleID ) { return $this->mArticleID; }
 303                 $this->mArticleID = $wgLinkCache->addLink(
 304                   $this->getPrefixedDBkey() );
 305                 return $this->mArticleID;
 306         }
 307
 308         function resetArticleID( $newid )
 309         {
 310                 global $wgLinkCache;
 311                 $wgLinkCache->clearBadLink( $this->getPrefixedDBkey() );
 312
 313                 if ( 0 == $newid ) { $this->mArticleID = -1; }
 314                 else { $this->mArticleID = $newid; }
 315                 $this->mRestrictionsLoaded = false;
 316                 $this->mRestrictions = array();
 317         }
 318
 319         /* private */ function prefix( $name )
 320         {
 321                 global $wgLang;
 322
 323                 $p = "";
 324                 if ( "" != $this->mInterwiki ) {
 325                         $p = $this->mInterwiki . ":";
 326                 }
 327                 if ( 0 != $this->mNamespace ) {
 328                         $p .= $wgLang->getNsText( $this->mNamespace ) . ":";
 329                 }
 330                 return $p . $name;
 331         }
 332
 333         # Assumes that mDbkeyform has been set, and is urldecoded
 334     # and uses undersocres, but not otherwise munged.  This function
 335     # removes illegal characters, splits off the winterwiki and
 336     # namespace prefixes, sets the other forms, and canonicalizes
 337     # everything.  This one function is really at the core of
 338         # Wiki--don't mess with it unless you're really sure you know
 339         # what you're doing.
 340         #
 341         /* private */ function secureAndSplit()
 342         {
 343                 global $wgLang, $wgLocalInterwiki;
 344                 wfProfileIn( "Title::secureAndSplit" );
 345
 346                 $validNamespaces = $wgLang->getNamespaces();
 347                 unset( $validNamespaces[0] );
 348
 349                 $this->mInterwiki = $this->mFragment = "";
 350                 $this->mNamespace = 0;
 351
 352                 $t = preg_replace( "/[\\s_]+/", "_", $this->mDbkeyform );
 353                 if ( "_" == $t{0} ) { $t = substr( $t, 1 ); }
 354                 $l = strlen( $t );
 355                 if ( $l && ( "_" == $t{$l-1} ) ) { $t = substr( $t, 0, $l-1 ); }
 356                 if ( "" == $t ) { $t = "_"; }
 357
 358                 $this->mDbkeyform = $t;
 359                 $done = false;
 360
 361                 $imgpre = ":" . $wgLang->getNsText( Namespace::getImage() ) . ":";
 362                 if ( 0 == strncasecmp( $imgpre, $t, strlen( $imgpre ) ) ) {
 363                         $t = substr( $t, 1 );
 364                 }
 365                 if ( ":" == $t{0} ) {
 366                         $r = substr( $t, 1 );
 367                 } else {
 368                         if ( preg_match( "/^((?:i|x|[a-z]{2,3})(?:-[a-z0-9]+)?|[A-Za-z0-9_\\x80-\\xff]+):(.*)$/", $t, $m ) ) {
 369                                 #$p = strtolower( $m[1] );
 370                                 $p = $m[1];
 371                                 if ( $ns = $wgLang->getNsIndex( strtolower( $p ) )) {
 372                                         $t = $m[2];
 373                                         $this->mNamespace = $ns;
 374                                 } elseif ( $this->getInterwikiLink( $p ) ) {
 375                                         $t = $m[2];
 376                                         $this->mInterwiki = $p;
 377
 378                                         if ( preg_match( "/^([A-Za-z0-9_\\x80-\\xff]+):(.*)$/",
 379                                           $t, $m ) ) {
 380                                                 $p = strtolower( $m[1] );
 381                                         } else {
 382                                                 $done = true;
 383                                         }
 384                                         if($this->mInterwiki != $wgLocalInterwiki)
 385                                                 $done = true;
 386                                 }
 387                         }
 388                         $r = $t;
 389                 }
 390                 if ( 0 == strcmp( $this->mInterwiki, $wgLocalInterwiki ) ) {
 391                         $this->mInterwiki = "";
 392                 }
 393                 # We already know that some pages won't be in the database!
 394                 #
 395                 if ( "" != $this->mInterwiki || -1 == $this->mNamespace ) {
 396                         $this->mArticleID = 0;
 397                 }
 398                 $f = strstr( $r, "#" );
 399                 if ( false !== $f ) {
 400                         $this->mFragment = substr( $f, 1 );
 401                         $r = substr( $r, 0, strlen( $r ) - strlen( $f ) );
 402                 }
 403                 # Strip illegal characters.
 404                 #
 405                 $tc = Title::legalChars();
 406                 $t = preg_replace( "/[^{$tc}]/", "", $r );
 407
 408                 if( $this->mInterwiki == "") $t = $wgLang->ucfirst( $t );
 409                 $this->mDbkeyform = $t;
 410                 $this->mUrlform = wfUrlencode( $t );
 411                 $this->mTextform = str_replace( "_", " ", $t );
 412
 413                 wfProfileOut();
 414         }
 415 }
 416 ?>