+++ /dev/null
-<?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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
- *
- * @author Evan Prodromou <evan@wikitravel.org>
- */
-
-/**
- * TODO: Perhaps make this file into a Metadata class, with static methods (declared
- * as private where indicated), to move these functions out of the global namespace?
- */
-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)) {
- $url = htmlspecialchars( $wgRightsUrl );
- print " <cc:license rdf:resource=\"$url\" />\n";
- }
-
- ccSubEpilogue('Work');
-
- if (isset($wgRightsUrl)) {
- $terms = ccGetTerms($wgRightsUrl);
- if ($terms) {
- ccSubPrologue('License', $wgRightsUrl);
- ccLicense($terms);
- ccSubEpilogue('License');
- }
- }
- }
-
- ccEpilogue();
-}
-
-/**
- * @private
- */
-function rdfSetup() {
- global $wgOut, $_SERVER;
-
- $httpaccept = isset($_SERVER['HTTP_ACCEPT']) ? $_SERVER['HTTP_ACCEPT'] : null;
-
- $rdftype = wfNegotiateType(wfAcceptToPrefs($httpaccept), wfAcceptToPrefs(RDF_TYPE_PREFS));
-
- if (!$rdftype) {
- wfHttpError(406, "Not Acceptable", wfMsg("notacceptable"));
- return false;
- } else {
- $wgOut->disable();
- header( "Content-type: {$rdftype}; charset=utf-8" );
- $wgOut->sendCacheControl();
- return true;
- }
-}
-
-/**
- * @private
- */
-function dcPrologue($url) {
- global $wgOutputEncoding;
-
- $url = htmlspecialchars( $url );
- print "<" . "?xml version=\"1.0\" encoding=\"{$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 $wgContLanguageCode, $wgSitename;
-
- dcElement('title', $article->mTitle->getText());
- dcPageOrString('publisher', wfMsg('aboutpage'), $wgSitename);
- dcElement('language', $wgContLanguageCode);
- dcElement('type', 'Text');
- dcElement('format', 'text/html');
- dcElement('identifier', dcReallyFullUrl($article->mTitle));
- dcElement('date', dcDate($article->getTimestamp()));
-
- $last_editor = $article->getUser();
-
- if ($last_editor == 0) {
- dcPerson('creator', 0);
- } else {
- dcPerson('creator', $last_editor, $article->getUserText(),
- User::whoIsReal($last_editor));
- }
-
- $contributors = $article->getContributors();
-
- foreach ($contributors as $user_parts) {
- dcPerson('contributor', $user_parts[0], $user_parts[1], $user_parts[2]);
- }
-
- dcRights();
-}
-
-/**
- * @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) {
- $url = htmlspecialchars( $url );
- echo " <cc:{$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) {
- $value = htmlspecialchars( $value );
- print " <dc:{$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) {
- return $title->getFullURL();
-}
-
-/**
- * @private
- */
-function dcPageOrString($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) {
- $url = htmlspecialchars( $url );
- print " <dc:{$name} rdf:resource=\"{$url}\" />\n";
-}
-
-/**
- * @private
- */
-function dcPerson($name, $id, $user_name='', $user_real_name='') {
- global $wgContLang;
-
- if ($id == 0) {
- dcElement($name, wfMsg('anonymous'));
- } else if ( !empty($user_real_name) ) {
- dcElement($name, $user_real_name);
- } else {
- # XXX: This shouldn't happen.
- if( empty( $user_name ) ) {
- $user_name = User::whoIs($id);
- }
- dcPageOrString($name, $wgContLang->getNsText(NS_USER) . ':' . $user_name, wfMsg('siteuser', $user_name));
- }
-}
-
-/**
- * Takes an arg, for future enhancement with different rights for
- * different pages.
- * @private
- */
-function dcRights() {
-
- 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();
- if( isset( $known[$url] ) ) {
- return $known[$url];
- } else {
- return array();
- }
- }
-}
-
-/**
- * @private
- */
-function getKnownLicenses() {
-
- $ccLicenses = array('by', 'by-nd', 'by-nd-nc', 'by-nc',
- 'by-nc-sa', 'by-sa');
- $ccVersions = array('1.0', '2.0');
- $knownLicenses = array();
-
- foreach ($ccVersions as $version) {
- foreach ($ccLicenses as $license) {
- if( $version == '2.0' && substr( $license, 0, 2) != 'by' ) {
- # 2.0 dropped the non-attribs licenses
- continue;
- }
- $lurl = "http://creativecommons.org/licenses/{$license}/{$version}/";
- $knownLicenses[$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;
-}
-
-
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