[add]: State manager

1 files changed, 39 insertions, 0 deletions

diff --git a/src/Core/StateManager.h b/src/Core/StateManager.h
new file mode 100644
index 0000000..06370f3
--- /dev/null
+++ b/src/Core/StateManager.h
@@ -0,0 +1,39 @@
+#pragma once
+
+#include <memory>
+#include <string>
+#include <unordered_map>
+
+#include "State.h"
+
+namespace Donut
+{
+    class StateManager
+    {
+    public:
+        ~StateManager() = default;
+        void Shutdown();
+        
+        void Update(float deltaTime);
+        void Render();
+        void OnEvent(Event& event);
+        
+        void RegisterState(const std::string& stateName, std::unique_ptr<State> state);
+        void SwitchToState(const std::string& stateName);
+
+        std::string GetCurrentStateName() const { return m_CurrentStateName; }
+        State* GetCurrentState()          const { return m_CurrentState; }
+        
+        State* GetState(const std::string& stateName);
+        bool   HasState(const std::string& stateName) const;
+    private:
+        void CreateStates();
+        void DestroyStates();
+
+    private:
+        State*      m_CurrentState     = nullptr;
+        std::string m_CurrentStateName = "";
+        
+        std::unordered_map<std::string, std::unique_ptr<State>> m_States;
+    };
+}