chord_quiz.js

//TODO add slash chords

let kind, base = null;
let chord_found;
let chord_array;
let chord_held = []; // notes currently held by the user, treated as a set


function random_chord(){
    if ( (chord = chords.get_random()) == null) return;
    if ( (base  = notes.get_random()) == null) return;
    last_chord = chord;
    last_base = base;
    chord_array = addConstantModulo12(chord.notes, base.number)
    cprint(base.name + chord.name);
}

function chord_callback(event){
    [type, key, intensity] = event.data;
    
    chord_held = [... new Set(addConstantModulo12(notes_down, 0))]
    if (haveSameElements(addConstantModulo12(chord_held, 0), chord_array)){
        chord_held.forEach((note) => {
            green_key(note);
        });
        chord_found = true;
    }

    // a little sloppy but it feels more right than just the name changing
    // while the correct previous chord is still being held

    if (type == KEYUP && chord_found){ 
        chord_held.forEach((note) => {
            unlight_key(note);
        });
        chord_found = false;
        random_chord();
    }
}

function init_chord(){
    canvas.style.display = 'none';
    init_quiz(random_chord, chord_callback)
}

add_game_button('chords', init_chord);