CommandProcessor追加

feature/debug/src/main/java/one/nem/kidshift/feature/debug/DebugCommandProcessor.java

@@ -0,0 +1,39 @@
+package one.nem.kidshift.feature.debug;
+
+public class DebugCommandProcessor {
+
+    public DebugCommandProcessor() {
+    }
+
+    public String execute(String command) {
+        try {
+            return processCommand(command);
+        } catch (InvalidCommandException e) {
+            return e.getMessage();
+        } catch (Exception e) {
+            return "Something went wrong!";
+        }
+    }
+
+    private String processCommand(String command) throws Exception {
+        // Parse to Array
+        String[] commandArray = command.split(" ");
+
+        // Check if command is valid
+        switch (commandArray[0]) {
+            case "ping":
+                return "pong";
+            case "echo":
+                return commandArray[1];
+            default:
+                throw new InvalidCommandException();
+        }
+    }
+
+    // Exceptions
+    private static class InvalidCommandException extends Exception {
+        public InvalidCommandException() {
+            super("Invalid Command");
+        }
+    }
+}