Refactored servercommands, added tcp client, added command queue.

src/main/java/org/toop/server/ServerCommand.java

@@ -0,0 +1,66 @@
+package org.toop.server;
+
+import java.util.EnumSet;
+
+public enum ServerCommand {
+    /**
+     * Login, "username"
+     */
+    LOGIN,
+    /**
+     * Logout, "username"
+     */
+    LOGOUT,
+    EXIT,
+    QUIT,
+    DISCONNECT,
+    BYE,
+    GET,
+    SUBSCRIBE,
+    MOVE,
+    CHALLENGE,
+    FORFEIT,
+    MESSAGE,
+    HELP;
+
+    private static final EnumSet<ServerCommand> VALID_COMMANDS = EnumSet.of(
+        ServerCommand.LOGIN,     ServerCommand.LOGOUT,     ServerCommand.EXIT,
+        ServerCommand.QUIT,      ServerCommand.DISCONNECT, ServerCommand.BYE,
+        ServerCommand.GET,       ServerCommand.SUBSCRIBE,  ServerCommand.MOVE,
+        ServerCommand.CHALLENGE, ServerCommand.FORFEIT,
+        ServerCommand.MESSAGE,   ServerCommand.HELP
+    );
+
+    public static EnumSet<ServerCommand> getValidCommands() {
+        return VALID_COMMANDS;
+    }
+
+    // TODO: Garbage code.
+
+    /**
+     * @param command Checks if string is a valid command.
+     * @return returns a boolean if string is a valid command.
+     */
+    public static boolean isValid(String command) {
+        try {
+            ServerCommand.valueOf(command.toUpperCase());
+            return true;
+        } catch (IllegalArgumentException err) {
+            return false;
+        }
+    }
+
+    // TODO: Return something better
+    /**
+     * @param command Converts a string into a ServerCommand.
+     * @return returns a ServerCommand enum.
+     */
+    public static ServerCommand getCommand(String command) {
+        if (isValid(command)) {
+            ServerCommand.valueOf(command.toUpperCase());
+            return ServerCommand.valueOf(command.toUpperCase());
+        }
+        return null;
+    }
+
+}