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/******************************************************************
*
*	CyberUPnP for Java
*
*	Copyright (C) Satoshi Konno 2002-2003
*
*	File: ST.java
*
*	Revision;
*
*	01/31/03
*		- first revision.
*
******************************************************************/

package org.cybergarage.upnp.event;

import org.cybergarage.upnp.*;

public class Subscription 
{
	public final static String XMLNS = "urn:schemas-upnp-org:event-1-0";
	public final static String TIMEOUT_HEADER = "Second-";
	public final static String INFINITE_STRING = "infinite";	
	public final static int INFINITE_VALUE = -1;	
	public final static String UUID = "uuid:";
	public final static String SUBSCRIBE_METHOD = "SUBSCRIBE";
	public final static String UNSUBSCRIBE_METHOD = "UNSUBSCRIBE";

	////////////////////////////////////////////////
	//	Timeout
	////////////////////////////////////////////////
	
	public final static String toTimeoutHeaderString(long time)
	{
		if (time == Subscription.INFINITE_VALUE)
			return Subscription.INFINITE_STRING;
		return Subscription.TIMEOUT_HEADER + Long.toString(time);
	}
	
	public final static long getTimeout(String headerValue)
	{
		int minusIdx = headerValue.indexOf('-');
		long timeout = Subscription.INFINITE_VALUE;
		try {
			String timeoutStr = headerValue.substring(minusIdx+1, headerValue.length());
			timeout = Long.parseLong(timeoutStr);
		}
		catch (Exception e) {}
		return timeout;
	}

	////////////////////////////////////////////////
	//	SID
	////////////////////////////////////////////////

	public static final String createSID()
	{
		return UPnP.createUUID();
	}

	public final static String toSIDHeaderString(String id)
	{
		return Subscription.UUID + id;
	}

	public final static String getSID(String headerValue)
	{
		if (headerValue == null)
			return "";
		if (headerValue.startsWith(Subscription.UUID) == false)
			return headerValue;
		return headerValue.substring(Subscription.UUID.length(), headerValue.length());
	}
	
}