holesome/src/game/input/input_mapper.cpp

#include "input_mapper.h"
#include "input_device_group.h"


InputMapper::InputMapper()
{
    // Initialize identities
    allIdentity = std::make_shared<InputIdentity>(InputDeviceGroup::ALL);
    keyboardIdentity = std::make_shared<InputIdentity>(InputDeviceGroup::KEYBOARD);
    gamepadIdentities = std::map<unsigned int, std::shared_ptr<InputIdentity>>();
}


void InputMapper::processEvents()
{
    sf::Event event{};
    while (Game::getInstance()->window->pollEvent(event))
    {
        switch (event.type)
        {
            case sf::Event::KeyPressed:
                handleKeyPress(event.key);
                break;
            case sf::Event::KeyReleased:
                handleKeyRelease(event.key);
                break;
            case sf::Event::Closed:
                Game::getInstance()->exit();
                break;
            case sf::Event::Resized:
                break;
            case sf::Event::JoystickMoved:
                handleJoystickMovement(event.joystickMove);
                break;
            case sf::Event::JoystickConnected:
                addGamepadIdentity(event.joystickConnect.joystickId);
                break;
            case sf::Event::JoystickDisconnected:
                deactivateGamepadIdentity(event.joystickConnect.joystickId);
                break;
            default:
                break;
        }
    }
}

void InputMapper::handleKeyPress(sf::Event::KeyEvent event)
{
    // Close game on Escape or Q in DEV Mode
    if (DEVELOPER_MODE && (event.code == sf::Keyboard::Escape || event.code == sf::Keyboard::Q))
    {
        Game::getInstance()->exit();
        return;
    }

    // Handle directionVector
    auto direction = Direction::getKeyDirection(event.code);
    if (direction != HardDirection::NONE)
    {
        getInputIdentity(InputDeviceGroup::KEYBOARD)->direction.add(direction);
    }
}

void InputMapper::handleKeyRelease(sf::Event::KeyEvent event)
{
    // Handle directionVector
    auto direction = Direction::getKeyDirection(event.code);
    if (direction != HardDirection::NONE)
    {
        getInputIdentity(InputDeviceGroup::KEYBOARD)->direction.remove(direction);
    }
}

void InputMapper::handleJoystickMovement(sf::Event::JoystickMoveEvent event)
{
    auto gamepadIdentity = getInputIdentity(InputDeviceGroup::GAMEPAD, event.joystickId);

    auto value = event.position / 100.f;
    auto axis = event.axis;

    // Handle deadzone and joystick drift
    if (value > -JOYSTICK_DEADZONE && value < JOYSTICK_DEADZONE)
    {
        value = 0.f;
    }

    if (axis == sf::Joystick::Axis::X)
    {
        gamepadIdentity->direction.setX(value);
    } else if (axis == sf::Joystick::Axis::Y)
    {
        value *= -1;    // Is inverted
        gamepadIdentity->direction.setY(value);
    }
}

std::shared_ptr<InputIdentity> InputMapper::getInputIdentity(InputDeviceGroup deviceType, unsigned int gamepadId)
{
    switch (deviceType)
    {
        case InputDeviceGroup::KEYBOARD:
            return keyboardIdentity;
        case InputDeviceGroup::GAMEPAD:
            if (!gamepadIdentities.contains(gamepadId))
            {
                // Create if it does not exist yet
                addGamepadIdentity(gamepadId);
            }
            return gamepadIdentities[gamepadId];
        default:
            return allIdentity;
    }
}

void InputMapper::addGamepadIdentity(unsigned int gamepadId)
{
    // Exists already?
    if (gamepadIdentities.contains(gamepadId))
    {
        gamepadIdentities[gamepadId]->isActive = true;
        return;
    }

    // Does not exist yet, create new
    auto newIdentity = std::make_shared<InputIdentity>(InputDeviceGroup::GAMEPAD, gamepadId);
    gamepadIdentities[gamepadId] = newIdentity;
}

void InputMapper::deactivateGamepadIdentity(unsigned int gamepadId)
{
    auto gamepadIdentity = getInputIdentity(InputDeviceGroup::GAMEPAD, gamepadId);
    gamepadIdentity->isActive = false;

}

std::shared_ptr<InputMapper> InputMapper::getInstance()
{
    if (singletonInstance == nullptr)
    {
        singletonInstance = std::make_shared<InputMapper>();
    }

    return singletonInstance;
}

std::vector<std::shared_ptr<InputIdentity>> InputMapper::getAllInputIdentities()
{
    std::vector<std::shared_ptr<InputIdentity>> allIdentities;

    allIdentities.push_back(allIdentity);
    allIdentities.push_back(keyboardIdentity);

    for (auto const &[key, val]: gamepadIdentities)
    {
        allIdentities.push_back(val);
    }

    return allIdentities;
}