harmonia/Harmonia.WinUI/Session/SessionTracker.cs

using Harmonia.Core.Player;
using Harmonia.Core.Playlists;
using System;

namespace Harmonia.WinUI.Session;

public class SessionTracker(
    ISessionService sessionService,
    IPlaylistManager playlistManager,
    IAudioPlayer audioPlayer) : ISessionTracker
{
    public void Start()
    {
        playlistManager.CurrentPlaylistChanged += OnCurrentPlaylistChanged;
        audioPlayer.PlayingSongChanged += OnPlayingSongChanged;
        audioPlayer.PropertyChanged += OnAudioPlayerPropertyChanged;
    }

    private void OnCurrentPlaylistChanged(object? sender, EventArgs e)
    {
        PlaylistState playlistState = sessionService.Session.Playlist;
        playlistState.OpenPlaylistUID = playlistManager.CurrentPlaylist?.UID;
    }

    private void OnPlayingSongChanged(object? sender, PlayingSongChangedEventArgs e)
    {
        AudioPlayerState audioPlayerState = sessionService.Session.Player;
        audioPlayerState.PlaylistSongUID = e.NewSong?.UID;
    }

    private void OnAudioPlayerPropertyChanged(object? sender, System.ComponentModel.PropertyChangedEventArgs e)
    {
        switch (e.PropertyName)
        {
            case nameof(IAudioPlayer.State):
                sessionService.Session.Player.PlaybackState = audioPlayer.State;
                break;
        }
    }

    public void Capture()
    {
        sessionService.Session.Player.Position = audioPlayer.Position;
    }
}