/*
 * Copyright 2013 Robert von Burg <eitch@eitchnet.ch>
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package li.strolch.rest.helper;

import java.util.Locale;

import javax.servlet.http.HttpServletRequest;
import javax.ws.rs.core.HttpHeaders;

import li.strolch.privilege.model.Certificate;
import li.strolch.rest.StrolchRestfulConstants;
import li.strolch.utils.dbc.DBC;
import li.strolch.utils.helper.StringHelper;

/**
 * @author Robert von Burg <eitch@eitchnet.ch>
 */
public class RestfulHelper {

	public static Locale getLocale(HttpHeaders headers) {
		if (headers == null || StringHelper.isEmpty(headers.getHeaderString(HttpHeaders.ACCEPT_LANGUAGE)))
			return null;
		return headers.getAcceptableLanguages().get(0);
	}

	public static Certificate getCert(HttpServletRequest request) {
		Certificate cert = (Certificate) request.getAttribute(StrolchRestfulConstants.STROLCH_CERTIFICATE);
		DBC.PRE.assertNotNull("Certificate not found as request attribute!", cert);
		return cert;
	}
}