Forgot to add this file.

diff --git a/includes/Metadata.php b/includes/Metadata.php
new file mode 100644 (file)
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+++ b/includes/Metadata.php
@@ -0,0 +1,289 @@
+<?php
+/* Metadata.php -- provides DublinCore and CreativeCommons metadata
+ * Copyright 2004, Evan Prodromou <evan@wikitravel.org>.
+ * 
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+define(RDF_TYPE_PREFS, "application/rdf+xml,text/xml;q=0.7,application/xml;q=0.5,text/rdf;q=0.1");
+                        
+function wfDublinCoreRdf($article) {
+    
+  $url = dcReallyFullUrl($article->mTitle);
+    
+  if (rdfSetup()) {
+      dcPrologue($url);
+      dcBasics($article);
+      dcEpilogue();
+  }
+}
+
+function wfCreativeCommonsRdf($article) {
+    
+  if (rdfSetup()) {
+      global $wgRightsUrl;
+
+      $url = dcReallyFullUrl($article->mTitle);
+    
+      ccPrologue();
+      ccSubPrologue('Work', $url);
+      dcBasics($article);
+      if (isset($wgRightsUrl)) {
+         print "    <cc:license rdf:resource=\"$wgRightsUrl\" />\n";
+      }
+      
+      ccSubEpilogue('Work');
+      
+      if (isset($wgRightsUrl)) {
+         $terms = ccGetTerms($wgRightsUrl);
+         if ($terms) {
+             ccSubPrologue('License', $wgRightsUrl);
+      ccLicense($terms);
+             ccSubEpilogue('License');
+         }
+      }
+  }
+    
+  ccEpilogue();
+}
+
+/* private */ function rdfSetup() {
+  global $wgOut, $wgRdfMimeType, $_SERVER;
+
+  $rdftype = wfNegotiateType(wfAcceptToPrefs($_SERVER['HTTP_ACCEPT']), wfAcceptToPrefs(RDF_TYPE_PREFS));
+
+  if (!$rdftype) {
+      wfHttpError(406, "Not Acceptable", wfMsg("notacceptable"));
+      return false;
+  } else {
+      $wgOut->disable();
+      header( "Content-type: {$rdftype}" );
+      $wgOut->sendCacheControl();
+      return true;
+  }
+}
+
+/* private */ function dcPrologue($url) {
+  global $wgOutputEncoding;
+
+  print "<?xml version=\"1.0\" encoding=\"{$wgOutputEncoding}\" ?>
+                       
+<!DOCTYPE rdf:RDF PUBLIC \"-//DUBLIN CORE//DCMES DTD 2002/07/31//EN\" \"http://dublincore.org/documents/2002/07/31/dcmes-xml/dcmes-xml-dtd.dtd\">
+                       
+<rdf:RDF xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\"
+         xmlns:dc=\"http://purl.org/dc/elements/1.1/\">
+  <rdf:Description rdf:about=\"$url\">
+";
+}
+
+/* private */ function dcEpilogue() {
+    print "
+  </rdf:Description>
+</rdf:RDF>
+";
+}
+
+/* private */ function dcBasics($article) {
+  global $wgLanguageCode, $wgSitename;
+
+  dcElement('title', $article->mTitle->getText());
+  dcPageOrString('publisher', wfMsg('aboutpage'), $wgSitename);
+  dcElement('language', $wgLanguageCode);
+  dcElement('type', 'Text');
+  dcElement('format', 'text/html');
+  dcElement('identifier', dcReallyFullUrl($article->mTitle));
+  dcElement('date', dcDate($article->getTimestamp()));
+  dcPerson('creator', $article->getUser());
+
+  $contributors = dcContributors($article->mTitle);
+
+  foreach ($contributors as $cid) {
+    dcPerson('contributor', $cid);
+  }
+
+  dcRights($article);
+}
+
+/* private */ function ccPrologue() {
+    global $wgOutputEncoding;
+
+    echo "<?xml version='1.0'  encoding='{$wgOutputEncoding}' ?>
+          
+<rdf:RDF xmlns:cc=\"http://web.resource.org/cc/\"
+         xmlns:dc=\"http://purl.org/dc/elements/1.1/\"
+         xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\">
+";
+}  
+
+/* private */ function ccSubPrologue($type, $url) {
+    echo "  <cc:{$type} rdf:about=\"{$url}\">\n";
+}  
+
+/* private */ function ccSubEpilogue($type) {
+    echo "  </cc:{$type}>\n";
+}  
+
+/* private */ function ccLicense($terms) {
+
+  foreach ($terms as $term) {
+    switch ($term) {
+    case 're':
+      ccTerm('permits', "Reproduction"); break;
+    case 'di':
+      ccTerm('permits', "Distribution"); break;
+    case 'de':
+      ccTerm('permits', "DerivativeWorks"); break;
+    case 'nc':
+      ccTerm('prohibits', "CommercialUse"); break;
+    case 'no':
+      ccTerm('requires', "Notice"); break;
+    case 'by':
+      ccTerm('requires', "Attribution"); break;
+    case 'sa':
+      ccTerm('requires', "ShareAlike"); break;
+    case 'sc':
+      ccTerm('requires', "SourceCode"); break;         
+    }
+  }
+}
+
+/* private */ function ccTerm($term, $name) {
+  print "    <cc:{$term} rdf:resource=\"http://web.resource.org/cc/{$name}\" />\n";
+}
+
+/* private */ function ccEpilogue() {
+    echo "</rdf:RDF>\n";
+}
+
+/* private */ function dcElement($name, $value) {
+  print "    <dc:{$name}>{$value}</dc:{$name}>\n";
+}
+
+/* private */ function dcDate($timestamp) {
+  return substr($timestamp, 0, 4) . "-" 
+    . substr($timestamp, 4, 2) . "-" 
+    . substr($timestamp, 6, 2);
+}
+
+/* private */ function dcReallyFullUrl($title) {
+  $title->getFullURL();
+}
+
+/* private */ function dcPageOrString($name, $page, $str) {
+  $nt = Title::newFromText($page);
+
+  if (!$nt || $nt->getArticleID() == 0) {
+    dcElement($name, $str);
+  } else {
+    dcPage($name, $nt);
+  }
+}
+
+/* private */ function dcPage($name, $title) {
+  dcUrl($name, dcReallyFullUrl($title));
+}
+
+/* private */ function dcUrl($name, $url) {
+  print "    <dc:{$name} rdf:resource=\"{$url}\" />\n";
+}
+
+/* private */ function dcPerson($name, $id) {
+  global $wgLang;
+
+  if ($id == 0) {
+    dcElement($name, wfMsg("anonymous"));
+  } else {
+    $user_name = User::whoIs($id);
+    dcPageOrString($name, $wgLang->getNsText(NS_USER) . ":" . $user_name, $user_name);
+  }
+}
+
+/* private */ function dcContributors($title) {
+
+  $contribs = array();
+
+  $res = wfQuery("SELECT DISTINCT old_user" .
+                 " FROM old " .
+                 " WHERE old_namespace = " . $title->getNamespace() .
+                 " AND old_title = '" . $title->getDBkey() . "'", DB_READ);
+
+  while ( $line = wfFetchObject( $res ) ) {
+    $contribs[] = $line->old_user;
+  }    
+
+  return $contribs;
+}
+
+/* Takes an arg, for future enhancement with different rights for
+ different pages. */
+
+/* private */ function dcRights($article) {
+
+  global $wgRightsPage, $wgRightsUrl, $wgRightsText;
+
+  if (isset($wgRightsPage) &&
+      ($nt = Title::newFromText($wgRightsPage))
+      && ($nt->getArticleID() != 0)) {
+      dcPage('rights', $nt);
+  } else if (isset($wgRightsUrl)) {
+    dcUrl('rights', $wgRightsUrl);
+  } else if (isset($wgRightsText)) {
+    dcElement('rights', $wgRightsText);
+  }
+}
+
+/* private */ function ccGetTerms($url) {
+  global $wgLicenseTerms;
+
+  if (isset($wgLicenseTerms)) {
+    return $wgLicenseTerms;
+  } else {
+    $known = getKnownLicenses();
+    return $known[$url];
+  }
+}
+
+/* private */ function getKnownLicenses() {
+
+  $ccLicenses = array('by', 'by-nd', 'by-nd-nc', 'by-nc', 
+                      'by-nc-sa', 'by-sa', 'nd', 'nd-nc',
+                      'nc', 'nc-sa', 'sa');
+
+  $knownLicenses = array();
+
+  foreach ($ccLicenses as $license) {
+    $lurl = "http://creativecommons.org/licenses/{$license}/1.0/";
+    $knownLicenses[$lurl] = explode('-', $license);
+    $knownLicenses[$lurl][] = 're';
+    $knownLicenses[$lurl][] = 'di';
+    $knownLicenses[$lurl][] = 'no';
+    if (!in_array('nd', $knownLicenses[$lurl])) {
+      $knownLicenses[$lurl][] = 'de';
+    }
+  }
+
+  /* Handle the GPL and LGPL, too. */
+
+  $knownLicenses["http://creativecommons.org/licenses/GPL/2.0/"] =
+    array('de', 're', 'di', 'no', 'sa', 'sc');
+  $knownLicenses["http://creativecommons.org/licenses/LGPL/2.1/"] = 
+    array('de', 're', 'di', 'no', 'sa', 'sc');
+  $knownLicenses["http://www.gnu.org/copyleft/fdl.html"] = 
+    array('de', 're', 'di', 'no', 'sa', 'sc');
+
+  return $knownLicenses;
+}
+
+?>