Added API driven Rooms

src/main/java/eu/mhsl/minenet/minigames/api/Controller.java

@@ -0,0 +1,35 @@
+package eu.mhsl.minenet.minigames.api;
+
+import com.google.gson.Gson;
+import spark.Request;
+import spark.Response;
+import spark.Route;
+
+import java.lang.reflect.ParameterizedType;
+
+public abstract class Controller<Q, R> implements Route {
+    private final Class<Q> requestType;
+
+    @SuppressWarnings("unchecked")
+    public Controller() {
+        this.requestType = ((Class<Q>) ((ParameterizedType) getClass().getGenericSuperclass()).getActualTypeArguments()[0]);
+    }
+
+    @Override
+    public Object handle(Request request, Response response) throws Exception {
+        response.header("Access-Control-Allow-Origin", "*");
+        response.header("Access-Control-Allow-Methods", "*");
+
+        Q req;
+
+        if(request.body().isEmpty()) {
+            req = null;
+        } else {
+            req = new Gson().fromJson(request.body(), this.requestType);
+        }
+
+        return new Gson().toJson(handle(req, response));
+    }
+
+    public abstract R handle(Q request, Response response) throws Exception;
+}