3 files changed, 170 insertions, 19 deletions

diff --git a/src/main/java/derms/client/CLI.java b/src/main/java/derms/client/CLI.java
new file mode 100644
index 0000000..05f4e35
--- /dev/null
+++ b/src/main/java/derms/client/CLI.java
@@ -0,0 +1,86 @@
+package derms.client;
+
+import java.util.*;
+
+abstract class CLI implements Runnable {
+	protected Map<String, Command> commands = new HashMap<String, Command>();
+	protected List<Description> cmdDescriptions = new ArrayList<Description>();
+	protected List<Description> argDescriptions = new ArrayList<Description>();
+
+	protected CLI() {
+		commands.put("quit", new Quit());
+		cmdDescriptions.add(new Description("quit", "Exit the program"));
+
+		commands.put("help", new Help());
+		cmdDescriptions.add(new Description("help", "List commands"));
+	}
+
+	@Override
+	public void run() {
+		Scanner scanner = new Scanner(System.in);
+		System.out.println("Type 'help' for a list of commands.");
+		for (;;) {
+			System.out.print("Command: ");
+			String input = scanner.nextLine();
+			String[] fields = input.split(" ");
+			if (fields.length < 1 || fields[0] == "") {
+				continue;
+			}
+			Command cmd = commands.get(fields[0]);
+			if (cmd == null) {
+				System.out.println("Invalid command '"+fields[0]+"'");
+				System.out.println("Type 'help' for a list of commands.");
+				continue;
+			}
+			String[] args = null;
+			if (fields.length < 2) {
+				args = new String[0];
+			} else {
+				args = Arrays.copyOfRange(fields, 1, fields.length);
+			}
+			cmd.exec(args);
+		}
+	}
+
+	protected interface Command {
+		public void exec(String[] args);
+	}
+
+	protected class Quit implements Command {
+		@Override
+		public void exec(String[] args) {
+			System.out.println("Shutting down...");
+			System.exit(1);
+		}
+	}
+
+	protected class Help implements Command {
+		@Override
+		public void exec(String[] args) {
+			System.out.println("\nCommands:");
+			for (Description d : cmdDescriptions) {
+				System.out.println(d);
+			}
+			System.out.println("\nArguments:");
+			for (Description d : argDescriptions) {
+				System.out.println(d);
+			}
+			System.out.println();
+		}
+	}
+
+	protected class Description {
+		String object; /// The thing being described
+		String description;
+
+		protected Description(String object, String description) {
+			this.object = object;
+			this.description = description;
+		}
+
+		@Override
+		public String toString() {
+			return object+"\n\t"+description;
+		}
+	}
+}
diff --git a/src/main/java/derms/client/Client.java b/src/main/java/derms/client/Client.java
index 11e863f..7069f54 100644
--- a/src/main/java/derms/client/Client.java
+++ b/src/main/java/derms/client/Client.java
@@ -9,14 +9,12 @@ import javax.xml.ws.Service;
 import java.net.MalformedURLException;
 import java.net.URL;
 
-public abstract class Client {
+class Client {
     public static final String namespace = "frontend.derms";
     public static final QName qname = new QName("http://"+namespace+"/", DERMSServerImpl.class.getSimpleName()+"Service");
 
-    protected final DERMSInterface server;
-
-    protected Client(String FEhost) throws MalformedURLException {
+    static DERMSInterface connectToServer(String FEhost) throws MalformedURLException {
         URL url = new URL(FE.endpointURL(FEhost) + "?wsdl");
-        this.server = Service.create(url, qname).getPort(DERMSInterface.class);
+        return Service.create(url, qname).getPort(DERMSInterface.class);
     }
 }
diff --git a/src/main/java/derms/client/ResponderClient.java b/src/main/java/derms/client/ResponderClient.java
index af5dc3d..57bb132 100644
--- a/src/main/java/derms/client/ResponderClient.java
+++ b/src/main/java/derms/client/ResponderClient.java
@@ -1,36 +1,103 @@
 package derms.client;
 
+import derms.frontend.DERMSInterface;
+
 import java.net.MalformedURLException;
 
-public class ResponderClient extends Client {
-    public static final String usage = "Usage: java derms.client.ResponderClienet <FE host>";
+public class ResponderClient extends CLI {
+    public static final String usage = "Usage: java derms.client.ResponderClientCLI <FE host>";
+
+    private final DERMSInterface server;
+
+    private ResponderClient(String FEhost) throws MalformedURLException {
+        server = Client.connectToServer(FEhost);
+
+        commands.put("add", new Add());
+        cmdDescriptions.add(new Description(
+                "add <resource ID> <resource type> <duration>",
+                "Add ad resource to the server"));
+
+        commands.put("remove", new Remove());
+        cmdDescriptions.add(new Description(
+                "remove <resource ID> <duration>",
+                "Decrease the duration of a resource. If duration is negative, the resource is removed entirely."));
 
-    public ResponderClient(String FEhost) throws MalformedURLException {
-        super(FEhost);
+        commands.put("list", new List());
+        cmdDescriptions.add(new Description(
+                "list <resource name>",
+                "List available resources"));
     }
 
     public static void main(String[] args) {
         if (args.length < 1) {
-            System.err.println("Missing argument 'FE host'");
+            System.err.println(usage);
             System.exit(1);
         }
 
         String FEhost = args[0];
 
-        ResponderClient client = null;
         try {
-            client = new ResponderClient(FEhost);
+            (new ResponderClient(FEhost)).run();
         } catch (MalformedURLException e) {
-            System.err.println(e.getMessage());
-            System.exit(1);
+            e.printStackTrace();
+        }
+    }
+
+    private class Add implements Command {
+        @Override
+        public void exec(String[] args) {
+            if (args.length < 3)
+                System.out.println("invalid arguments for 'add'");
+            else
+                add(args[0], args[1], args[2]);
         }
 
-        System.out.println("Adding resource...");
-        String response = client.addResource("MTL1234", "AMBULANCE", 100);
-        System.out.println("Response: " + response);
+        private void add(String resourceID, String resourceName, String durationStr) {
+            try {
+                int duration = Integer.parseInt(durationStr);
+                if (duration < 0) {
+                    throw new NumberFormatException("duration less than 0");
+                }
+                String response = server.addResource(resourceID, resourceName, duration);
+                System.out.println(response);
+            } catch (NumberFormatException e) {
+                System.out.println("invalid duration: " + durationStr);
+            }
+        }
     }
 
-    public String addResource(String resourceID, String resourceName, int duration) {
-        return server.addResource(resourceID, resourceName, duration);
+    private class Remove implements Command {
+        @Override
+        public void exec(String[] args) {
+            if (args.length < 2)
+                System.out.println("invalid arguments for 'remove'");
+            else
+                remove(args[0], args[1]);
+        }
+
+        private void remove(String resourceID, String durationStr) {
+            try {
+                int duration = Integer.parseInt(durationStr);
+                String response = server.removeResource(resourceID, duration);
+                System.out.println(response);
+            } catch (NumberFormatException e) {
+                System.out.println("invalid duration: " + durationStr);
+            }
+        }
+    }
+
+    private class List implements Command {
+        @Override
+        public void exec(String[] args) {
+            if (args.length < 1)
+                System.out.println("invalid arguments for 'list'");
+            else
+                list(args[0]);
+        }
+
+        private void list(String resourceName) {
+            String response = server.listResourceAvailability(resourceName);
+            System.out.println(response);
+        }
     }
 }