A bevy system for the konami code

konami.rs

use bevy::input::keyboard::KeyboardInput;
use bevy::prelude::{EventReader, KeyCode, ResMut, Resource};
use std::process::exit;

#[derive(Resource)]
pub struct KonamiCombo(pub usize);

pub fn keyboard_events(
    mut key_evr: EventReader<KeyboardInput>,
    mut konami_combo: ResMut<KonamiCombo>,
) {
    use bevy::input::ButtonState;

    for ev in key_evr.iter() {
        match ev.state {
            ButtonState::Pressed => {
                // println!("Key press: {:?} ({})", ev.key_code, ev.scan_code);
            }
            ButtonState::Released => {
                // println!("Key release: {:?} ({})", ev.key_code, ev.scan_code);
                if ev.key_code.unwrap() == KONAMI_CODE[konami_combo.0] {
                    konami_combo.0 += 1;
                } else {
                    konami_combo.0 = 0;
                }
            }
        }

        if konami_combo.0 == KONAMI_CODE.len() - 1 {
            println!("You Win");
            exit(0); // TODO: switch to a 'win' AppState
        }
    }
}

// ↑↑↓↓←→←→BA Start Select
const KONAMI_CODE: [KeyCode; 12] = [
    KeyCode::Up,
    KeyCode::Up,
    KeyCode::Down,
    KeyCode::Down,
    KeyCode::Left,
    KeyCode::Right,
    KeyCode::Left,
    KeyCode::Right,
    KeyCode::B,
    KeyCode::A,
    KeyCode::Return,
    KeyCode::RShift,
];