/*
 * Copyright 2014 Federal Chancellery Austria
 * MOA-ID has been developed in a cooperation between BRZ, the Federal
 * Chancellery Austria - ICT staff unit, and Graz University of Technology.
 *
 * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by
 * the European Commission - subsequent versions of the EUPL (the "Licence");
 * You may not use this work except in compliance with the Licence.
 * You may obtain a copy of the Licence at:
 * http://www.osor.eu/eupl/
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the Licence is distributed on an "AS IS" basis,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Licence for the specific language governing permissions and
 * limitations under the Licence.
 *
 * This product combines work with different licenses. See the "NOTICE" text
 * file for details on the various modules and licenses.
 * The "NOTICE" text file is part of the distribution. Any derivative works
 * that you distribute must include a readable copy of the "NOTICE" text file.
 */
package at.gv.egovernment.moa.id.protocols.builder.attributes;

import eu.stork.peps.auth.commons.IPersonalAttributeList;
import eu.stork.peps.auth.commons.PersonalAttribute;
import at.gv.egovernment.moa.id.auth.data.AuthenticationSession;
import at.gv.egovernment.moa.id.auth.stork.STORKConstants;
import at.gv.egovernment.moa.id.data.IAuthData;
import at.gv.egovernment.moa.id.protocols.pvp2x.builder.attributes.exceptions.UnavailableAttributeException;
import at.gv.egovernment.moa.logging.Logger;

/**
 * @author tlenz
 *
 */
public class STORKAttributHelper {

	public static String getAttribut(String attributName,
			IAuthData authSession) throws UnavailableAttributeException {
		
		if (!authSession.isForeigner()) {
			throw new UnavailableAttributeException(attributName);
			
		} else {
			IPersonalAttributeList storkAttributes = authSession.getStorkAttributes();
			
			if ( storkAttributes == null ) {
				throw new UnavailableAttributeException(attributName);
				
			}

			try {
				PersonalAttribute attribut = storkAttributes.get(attributName);
				if (attribut != null) {
					
					return attribut.getValue().get(0);					 
					
				} else
					throw new UnavailableAttributeException(attributName);
				
			} catch (Exception e) {
				Logger.warn("Attribut " + attributName + " generation error", e);
				throw new UnavailableAttributeException(attributName);
			}
		}
		
	}
}