[Added] Headerfiles

include/StateService.h

@@ -0,0 +1,81 @@
+#ifndef STATE_SERVICE_H
+#define STATE_SERVICE_H
+
+#include "Screen.h"
+#include "ScreenState.h"
+#include <iostream>
+#include <memory>
+
+#if defined(PLATFORM_WEB)
+#include <emscripten/emscripten.h>
+#endif
+
+class StateService
+{
+private:
+    std::unique_ptr<Screen> currentScreen;
+
+    static StateService* instance;
+    // StateService() {}
+
+    // StateService() = default;
+    // friend StateService* StateService::getInstance();
+    StateService()
+    {
+        std::cout << "Singleton instance created."
+                  << std::endl;
+    }
+
+    // Private destructor to prevent external deletion
+    ~StateService()
+    {
+        std::cout << "Singleton instance destroyed."
+                  << std::endl;
+    }
+    
+public:
+    StateService(const StateService&) = delete;
+    StateService& operator=(const StateService&) = delete;
+    // ~StateService() = default;
+    // StateService(const StateService &) = delete;
+    // StateService &operator=(const StateService &) = delete;
+
+    //  StateService&  myStateService = StateService::instance(); 
+    // StateService(const StateService&) = delete;
+    // StateService& operator=(const StateService&) = delete;
+
+    // static StateService* getInstance();
+
+    //     static std::shared_ptr<StateService> getInstance() {
+    //     static std::shared_ptr<StateService> instance = std::make_shared<StateService>();
+    //     return instance;
+    // }
+    static StateService& getInstance()
+     {
+        if (instance == nullptr) {
+            instance = new StateService();
+        }
+        return *instance;
+    }
+
+    // static StateService* getInstance();
+
+    // {
+    //     if (!instance)
+    //     {
+    //         instance = std::make_unique<StateService>(); // This works because of the friend declaration
+    //     }
+    //     return instance.get(); // Return the raw pointer of the unique_ptr
+    // }
+
+    void setScreen(ScreenState screen);
+    Screen *getScreen();
+
+    void gameloop();
+};
+
+// StateService* StateService::instance = nullptr;
+
+// std::unique_ptr<StateService> StateService::instance = nullptr;
+
+#endif