/*
 * By Dave Makower
 * Copyright © 1996 by Pencom Web Works, a business unit of Pencom Systems, Inc.
 * Send inquiries to <davemak@pencom.com>
 */

import java.util.StringTokenizer;

/**
 *	A Message consists of an int code, a String for the user name
 *	and a String containing the text of the message.  When messages
 *	are sent via an I/O stream, they are delimited by | characters.
 *	A Message can not contain more than one line (i.e., it cannot
 *	contain any \n or \r characters.
 */
public class Message {
	int code = 0;	// what kind of message is this?
	String user;	// name of the user who sent this message
	String text;	// the contents of the message
	Object sender;	// the Object that created this message
	
	public Message() {
		this(0, " ", " ", null);
	}
	
	public Message(String s, Object who) {
		StringTokenizer st= new StringTokenizer(s, "|", false);
		
		sender = who;
		
		if ( st.countTokens() > 2) {
			// Should be a fully-formed message
			
			// First field should be an integer code
			try {
				code = Integer.parseInt(st.nextToken());
			} catch (NumberFormatException e1) {
				// not properly formed message;
				// treat it as a normal string
				// (for backward compatibility)
				code = 0;
				user = " "; // no user name
				text = s;
				return;
			}
			
			// Second field should be user name
			user = st.nextToken();
		}
		if (st.hasMoreTokens()) {
			// Third field should be the message, if any.
			// Allow '|' characters in the message (but no
			// line breaks).
			text = st.nextToken("\r\n");
			return;
		} else {
			text = " ";
			return;
		}
	}
	
	public Message(int c, String u, String t, Object who) {
		code = c;
		user = (u == null)? " ": u;
		text = (t == null)? " ": t;
		sender = who;
	}
	
	public Message(int c, Message msg) {
		this (c, msg.getUser(), msg.getText(), msg.getSender());
	}

	public int getCode() {
		return code;
	}
	
	public String getUser() {
		return user;
	}
		
	public String getText() {
		return text;
	}
	public Object getSender() {
		return sender;
	}
	
	public String toString() {
		String codeString = new Integer(code).toString();
		String userString = (user == null)? " " : user;
		// Note that the sender is not encoded into the String
		// ... but the code, user, and text are.  This puts
		// ... messages in the format in which they are sent
		// ... over the network.
		return (codeString + "|" + userString + "|" + text);
	}
}