/**
 * All rights reserved. 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 org.jivesoftware.smackx.pubsub;

import org.jivesoftware.smack.Connection;
import org.jivesoftware.smack.packet.PacketExtension;

/**
 * Represents a affiliation between a user and a node, where the {@link #type}
 * defines the type of affiliation.
 * 
 * Affiliations are retrieved from the {@link PubSubManager#getAffiliations()}
 * method, which gets affiliations for the calling user, based on the identity
 * that is associated with the {@link Connection}.
 * 
 * @author Robin Collier
 */
public class Affiliation implements PacketExtension {
	public enum Type {
		member, none, outcast, owner, publisher
	}

	protected String node;

	protected Type type;

	/**
	 * Constructs an affiliation.
	 * 
	 * @param nodeId
	 *            The node the user is affiliated with.
	 * @param affiliation
	 *            The type of affiliation.
	 */
	public Affiliation(String nodeId, Type affiliation) {
		node = nodeId;
		type = affiliation;
	}

	private void appendAttribute(StringBuilder builder, String att, String value) {
		builder.append(" ");
		builder.append(att);
		builder.append("='");
		builder.append(value);
		builder.append("'");
	}

	@Override
	public String getElementName() {
		return "subscription";
	}

	@Override
	public String getNamespace() {
		return null;
	}

	public String getNodeId() {
		return node;
	}

	public Type getType() {
		return type;
	}

	@Override
	public String toXML() {
		final StringBuilder builder = new StringBuilder("<");
		builder.append(getElementName());
		appendAttribute(builder, "node", node);
		appendAttribute(builder, "affiliation", type.toString());

		builder.append("/>");
		return builder.toString();
	}
}