/**
 *
 */
package com.beem.project.beem.utils;

import org.jivesoftware.smack.packet.Presence;

/**
 * Utility class to deal with Presence type.
 * 
 * @author nikita
 */
public final class PresenceType {

	/**
	 * The user is available to receive messages (default).
	 */
	public static final int AVAILABLE = 100;

	/**
	 * The user is unavailable to receive messages.
	 */
	public static final int UNAVAILABLE = 200;

	/**
	 * Request subscription to recipient's presence.
	 */

	public static final int SUBSCRIBE = 300;

	/**
	 * Grant subscription to sender's presence.
	 */
	public static final int SUBSCRIBED = 400;

	/**
	 * Request removal of subscription to sender's presence.
	 */
	public static final int UNSUBSCRIBE = 500;

	/**
	 * Grant removal of subscription to sender's presence.
	 */
	public static final int UNSUBSCRIBED = 600;

	/**
	 * The presence packet contains an error message.
	 */
	public static final int ERROR = 701;

	/**
	 * Private default constructor.
	 */
	private PresenceType() {
	}

	/**
	 * Get the presence type from a presence packet.
	 * 
	 * @param presence
	 *            the presence type
	 * @return an int representing the presence type
	 */
	public static int getPresenceType(Presence presence) {
		int res = PresenceType.ERROR;
		switch (presence.getType()) {
		case available:
			res = PresenceType.AVAILABLE;
			break;
		case unavailable:
			res = PresenceType.UNAVAILABLE;
			break;
		case subscribe:
			res = PresenceType.SUBSCRIBE;
			break;
		case subscribed:
			res = PresenceType.SUBSCRIBED;
			break;
		case unsubscribe:
			res = PresenceType.UNSUBSCRIBE;
			break;
		case unsubscribed:
			res = PresenceType.UNSUBSCRIBED;
			break;
		case error:
		default:
			res = PresenceType.ERROR;
		}
		return res;
	}

	/**
	 * Get the smack presence mode for a status.
	 * 
	 * @param type
	 *            the status type in beem
	 * @return the presence mode to use in presence packet or null if there is
	 *         no mode to use
	 */
	public static Presence.Type getPresenceTypeFrom(int type) {
		Presence.Type res;
		switch (type) {
		case AVAILABLE:
			res = Presence.Type.available;
			break;
		case UNAVAILABLE:
			res = Presence.Type.unavailable;
			break;
		case SUBSCRIBE:
			res = Presence.Type.subscribe;
			break;
		case SUBSCRIBED:
			res = Presence.Type.subscribed;
			break;
		case UNSUBSCRIBE:
			res = Presence.Type.unsubscribe;
			break;
		case UNSUBSCRIBED:
			res = Presence.Type.unsubscribed;
			break;
		case ERROR:
			res = Presence.Type.error;
			break;
		default:
			return null;
		}
		return res;
	}
}
