button_state_map.hpp

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#pragma once
 
#include "button_state.hpp"
#include <iostream>
#include <map>
 
namespace input
{
class button_state_map
{
    std::map<unsigned, button_state> map_;
 
public:
    void clear()
    {
        map_.clear();
    }
 
    auto get_state(uint32_t button) const -> button_state
    {
        return map_.at(button);
    }
 
    auto get_state(uint32_t button, const button_state default_state) const -> button_state
    {
        const auto& find = map_.find(button);
        if(find == map_.end())
        {
            return default_state;
        }
 
        return find->second;
    }
 
    void set_state(uint32_t button, button_state state)
    {
        const button_state last_state = get_state(button, button_state::up);
 
        if(state == button_state::pressed)
        {
            if(last_state == button_state::down || last_state == button_state::pressed)
            {
                state = button_state::down;
            }
        }
 
        map_[button] = state;
    }
 
    void update()
    {
        //  Update Pressed and Released states to Down and Up
        for(auto& p : map_)
        {
            switch(p.second)
            {
                case button_state::pressed:
                    p.second = button_state::down;
                    break;
 
                case button_state::released:
                    p.second = button_state::up;
                    break;
                default:
                    break;
            }
        }
    }
};
} // namespace input