refactor state management and input handling into separate classes

include/state.hpp

@@ -0,0 +1,58 @@
+#ifndef __STATE_HPP_
+#define __STATE_HPP_
+
+#include "config.hpp"
+#include "klotski.hpp"
+#include "mass_springs.hpp"
+#include "presets.hpp"
+
+#include <raymath.h>
+
+class StateManager {
+public:
+  MassSpringSystem &mass_springs;
+
+  int current_preset;
+  State current_state;
+  State previous_state;
+
+  bool edited = false;
+
+  std::unordered_set<State> winning_states;
+
+public:
+  StateManager(MassSpringSystem &mass_springs)
+      : mass_springs(mass_springs), current_preset(0),
+        current_state(generators[current_preset]()),
+        previous_state(current_state), edited(false) {
+    mass_springs.AddMass(MASS, Vector3Zero(), false, current_state);
+  }
+
+  StateManager(const StateManager &copy) = delete;
+  StateManager &operator=(const StateManager &copy) = delete;
+  StateManager(StateManager &&move) = delete;
+  StateManager &operator=(StateManager &&move) = delete;
+
+  ~StateManager() {}
+
+public:
+  auto LoadPreset(int preset) -> void;
+
+  auto ResetState() -> void;
+
+  auto PreviousPreset() -> void;
+
+  auto NextPreset() -> void;
+
+  auto FillGraph() -> void;
+
+  auto UpdateGraph() -> void;
+
+  auto ClearGraph() -> void;
+
+  auto FindWinningStates() -> void;
+
+  auto CurrentWinCondition() -> WinCondition;
+};
+
+#endif