InputManager.hpp

#ifndef INPUT_MANAGER_HPP
#define INPUT_MANAGER_HPP

#include <SDL2/SDL.h>
#include <map>
#include "Vector2.hpp"

static const unsigned int N_KEY_INPUTS = 1024;
static const unsigned int N_BUTTON_INPUTS = 6;

enum class Input {
    LEFT_MOUSE, RIGHT_MOUSE, MIDDLE_MOUSE,

    LEFT, RIGHT, UP, DOWN,
    ATTACK_LEFT, ATTACK_RIGHT, ATTACK_UP, ATTACK_DOWN,
    JUMP,
    ACTION_1, ACTION_2, ACTION_3, ACTION_4,
    UTIL_1, UTIL_2, UTIL_3,
    ENTER,
    QUIT
};

static const std::map<SDL_Keycode, Input> INPUT_MAP = {
    {SDLK_LEFT, Input::LEFT},     
    {SDLK_a, Input::LEFT},          
    {SDLK_RIGHT, Input::RIGHT},
    {SDLK_d, Input::RIGHT}, 
    {SDLK_UP, Input::UP},     
    {SDLK_w, Input::UP},          
    {SDLK_DOWN, Input::DOWN},
    {SDLK_s, Input::DOWN}, 

    {SDLK_j, Input::ATTACK_LEFT}, 
    {SDLK_l, Input::ATTACK_RIGHT}, 
    {SDLK_k, Input::ATTACK_DOWN},
    {SDLK_i, Input::ATTACK_UP},
    
    {SDLK_SPACE, Input::JUMP},  

    {SDLK_q, Input::ACTION_1},
    {SDLK_e, Input::ACTION_2},
    {SDLK_r, Input::ACTION_3},
    {SDLK_f, Input::ACTION_4},
    
    {SDLK_z, Input::UTIL_1},
    {SDLK_x, Input::UTIL_2},
    {SDLK_c, Input::UTIL_3},

    {SDLK_RETURN, Input::ENTER},
    {SDLK_ESCAPE, Input::QUIT}
};

static const std::map<int, Input> MOUSE_BUTTON_MAP = {
    {SDL_BUTTON_LEFT, Input::LEFT_MOUSE}, 
    {SDL_BUTTON_MIDDLE, Input::MIDDLE_MOUSE}, 
    {SDL_BUTTON_RIGHT, Input::RIGHT_MOUSE} 
};

class InputManager {
 public:
  static InputManager& instance();

  void PollInput();

  static bool GetActionPressed(
                               Input action);

  static bool GetActionHeld(
                            Input action);

  bool ShouldQuit() const;

  static Vector2 GetMousePos();

  InputManager(const InputManager&) = delete;

  InputManager& operator=(const InputManager&) = delete;

 private:
  InputManager();

  ~InputManager();

  std::map<Input, bool> inputHeld;

  std::map<Input, bool> inputPressed;

  bool quitFlag;

  void ClearPresses();

  void UpEvent(Input input);
  void DownEvent(Input input);

  Vector2 mousePos;
};

#endif