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diff --git a/src/blu_cat/int/controller.hpp b/src/blu_cat/int/controller.hpp
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+++ b/src/blu_cat/int/controller.hpp
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+/*
+ * Copyright 2022-2025 Frederico de Oliveira Linhares
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef BLU_CAT_INT_CONTROLLER_H
+#define BLU_CAT_INT_CONTROLLER_H 1
+
+#include <SDL3/SDL.h>
+
+namespace BluCat::INT
+{
+
+struct Controller
+{
+  virtual void
+  key_down(SDL_Keycode keycode){};
+  virtual void
+  key_up(SDL_Keycode keycode){};
+
+  virtual void
+  mouse_button_down(SDL_MouseButtonEvent& e){};
+  virtual void
+  mouse_button_up(SDL_MouseButtonEvent& e){};
+  virtual void
+  mouse_motion(int x, int y, int xrel, int yrel){};
+
+	virtual void
+	tick(){};
+	virtual void
+	render(){};
+
+	virtual
+	~Controller(){};
+};
+
+}
+
+#endif /* BLU_CAT_INT_CONTROLLER_H */