InputSystem.hpp

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#pragma once
 
#include "Engine/SystemManager.hpp"
#include "MyMath/MyVectors.hpp"
#include "Types.hpp"
#include <optional>


enum class InputType : u8
{
    NONE,
    KEY_PRESS,
    KEY_PRESS_REPEAT,
    KEY_DOWN,
    KEY_RELEASE,
    KEY_UP,
    AXIS,
    POSITION,
    DELTA
};

enum class InputObject : u8
{
    KEYBOARD,
    MOUSE,
    GAMEPAD,
};

struct Input
{
    InputType type = InputType::NONE;
    InputObject object = InputObject::KEYBOARD;
 
    u32 key = 0;
    u32 negativeKey = 0;
    u32 gamepad = 0;
 
    constexpr bool operator<=>(const Input&) const = default;
};

struct InputState
{
    bool boolean = false;
    float number = 0;
    Vec2<float> vector;
 
    constexpr bool operator<=>(const InputState&) const = default;
};

class InputSystem : public System
{
public:

    void Update(const float deltaT) override;

    void BindInput(const std::string& name, const Input& input);

    void UnbindInput(const std::string& name);

    std::optional<bool> GetBoolInput(const std::string& name);

    std::optional<float> GetNumberInput(const std::string& name);

    std::optional<Vec2<float>> GetVectorInput(const std::string& name);

    void SetScaling(const float scale, const Vec2<float> offset);
 
private:
 
    static void UpdateKeyboard(Input& input, InputState& state);
    void UpdateMouse(Input& input, InputState& state);
    static void UpdateGamepad(Input& input, InputState& state);
 
    std::unordered_map<std::string, std::vector<Input>> m_inputs;
    std::unordered_map<std::string, InputState> m_states;
 
    Vec2<float> m_scaledMousePos;
    float m_scale = 1;
    Vec2<float> m_offset;
};