added skeleton command-handlers

git-svn-id: svn://anubis/gvsu@142 45c1a28c-8058-47b2-ae61-ca45b979098e

cs656/lab2/src/ChatClient.java

@@ -9,6 +9,7 @@ public class ChatClient
 	private String myUserName;
 	private Thread myListenThread;
 	private ChatClientListener myListener;
+	private RegistrationInfo myRegistrationInfo;
 
 	private class ChatClientListener implements Runnable
 	{
@@ -49,16 +50,13 @@ public class ChatClient
 	public void run()
 	{
 		myListener = new ChatClientListener();
-		RegistrationInfo regInfo =
+		myRegistrationInfo =
 			new RegistrationInfo(myUserName,
 								 myListener.getHost(),
 								 myListener.getPort(),
 								 true);
-		try {
+		if (!register())
-			myPServ.register(regInfo);
+		{
-		} catch (Exception e) {
-			System.out.println("Exception caught when registering!");
-			e.printStackTrace();
 			return;
 		}
 
@@ -69,6 +67,30 @@ public class ChatClient
 		mainloop();
 	}
 
+	private boolean register()
+	{
+		try {
+			myPServ.register(myRegistrationInfo);
+		} catch (Exception e) {
+			System.out.println("Exception caught when registering!");
+			e.printStackTrace();
+			return false;
+		}
+		return true;
+	}
+
+	private boolean unregister()
+	{
+		try {
+			myPServ.unregister(myUserName);
+		} catch (Exception e) {
+			System.out.println("Exception caught when unregistering!");
+			e.printStackTrace();
+			return false;
+		}
+		return true;
+	}
+
 	private void mainloop()
 	{
 		BufferedReader br = new BufferedReader(
@@ -76,7 +98,43 @@ public class ChatClient
 		String line;
 		while ( (line = br.readLine()) != null)
 		{
+			line = line.trim();
+			if (line.equals(""))
+				continue;
+			String command, rest;
+			int spaceIndex = line.indexOf(' ');
+			if (spaceIndex > 0)
+			{
+				command = line.substring(0, spaceIndex);
+				rest = line.substring(spaceIndex + 1);
+				rest = rest.trim();
+			}
+			else
+			{
+				command = line;
+				rest = "";
+			}
+
+			if (command.equals("help") || command.equals("?"))
+			{
+				System.out.println("Commands:\n");
+				System.out.println("    quit - disconnect and exit program");
+				System.out.println("    friends - view a list of all peers on the system");
+			}
+			else if (command.equals("quit"))
+			{
+				// TODO: shut down listen thread
+				break;
+			}
+			else if (command.equals("friends"))
+			{
+			}
+			else
+			{
+				System.out.println("Unrecognized Command! Type 'help' or '?' for help!");
+			}
 		}
+		System.exit(0);
 	}
 
     public static void main(String args[])