. * * 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 */ /** * 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( $wgRightsUrl ); print " \n"; } ccSubEpilogue('Work'); if (isset($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}\" ?" . "> "; } /** * @private */ function dcEpilogue() { print " "; } /** * @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}' ?" . "> "; } /** * @private */ function ccSubPrologue($type, $url) { $url = htmlspecialchars( $url ); echo " \n"; } /** * @private */ function ccSubEpilogue($type) { echo " \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, $name) { print " \n"; } /** * @private */ function ccEpilogue() { echo "\n"; } /** * @private */ function dcElement($name, $value) { $value = htmlspecialchars( $value ); print " {$value}\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( $url ); print " \n"; } /** * @private */ function dcPerson($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; }