KaraokePC/KaraokePlayer/MainForm.cs

using System;
using MaterialSkin;
using MaterialSkin.Controls;
using System.IO;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.IO.Compression;
using System.Windows.Forms;
using KaraokePlayer.Classes;
using System.Threading.Tasks;
using System.Configuration;
using Herse.Models;

namespace KaraokePlayer
{
    public partial class MainForm : Form
    {
        private SongInfoForm songInfoForm = new SongInfoForm();
        private delegate void Action();
        private FirebaseController controller;
        private PlayerWrapper player; 

        public MainForm()
        {
            InitializeComponent();
            player = new PlayerWrapper(karaokeCDGPlayer, karaokeMP4Player);
            player.OnSongEnded += SongEnded;
        
            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
            this.WindowState = FormWindowState.Maximized;
            this.ShowInTaskbar = true;
            string controllerId = ConfigurationManager.AppSettings["KaraokePlayer.ControllerId"];
            //labelParty.Text = string.Format("https://herse.firebaseapp.com/  party: {0}", controllerId);

            controller = new FirebaseController(
                clientId: controllerId,
                stateChanged: (args) =>
                {
                    switch (args.State)
                    {
                        case PlayerState.Playing:
                            this.Invoke(new Action(() => {
                                songInfoForm.Hide();
                                player.play();
                            }));
                            break;
                        case PlayerState.Paused:
                            this.Invoke(new Action(() => { player.pause(); }));
                            break;
                        case PlayerState.Stopped:
                            this.Invoke(new Action(() => { player.stop(); }));
                            break;
                    }
                },
                songChanged: (args) =>
                {
                    this.Invoke(new Action(() => { player.stop(); }));
                    player.QueueItem = args.QueueItem;
                    this.Invoke(new Action(() => { previewSong(); }));
                }
            );
            controller.SetState(PlayerState.Stopped);
        }

        public void SongEnded()
        {
            controller.EndSong();
        }

        private async void previewSong()
        {
            songInfoForm.Update(player.QueueItem);
            songInfoForm.Show();
            if(controller.Settings == null || controller.Settings.AutoAdvance)
            {
                await Task.Delay(TimeSpan.FromSeconds(5));
                player.play();
                controller.SetState(PlayerState.Playing);
                songInfoForm.Hide();
            }
        }
    }
}