start music player

Commands/Music.cs

@@ -0,0 +1,40 @@
+//////////////////////////////////////////////////////////////////////
+// https://gist.github.com/Joe4evr/773d3ce6cc10dbea6924d59bbfa3c62a //
+//////////////////////////////////////////////////////////////////////
+
+using Discord;
+using Discord.Commands;
+using System.Threading.Tasks;
+
+public class Music : ModuleBase<ICommandContext>
+{
+    private readonly AudioService _service;
+
+    public Music(AudioService service)
+    {
+        _service = service;
+    }
+
+    // You *MUST* mark these commands with 'RunMode.Async'
+    // otherwise the bot will not respond until the Task times out.
+    [Command("join", RunMode = RunMode.Async)]
+    public async Task JoinCmd()
+    {
+        await _service.JoinAudio(Context.Guild, (Context.User as IVoiceState).VoiceChannel);
+    }
+
+    // Remember to add preconditions to your commands,
+    // this is merely the minimal amount necessary.
+    // Adding more commands of your own is also encouraged.
+    [Command("leave", RunMode = RunMode.Async)]
+    public async Task LeaveCmd()
+    {
+        await _service.LeaveAudio(Context.Guild);
+    }
+
+    [Command("play", RunMode = RunMode.Async)]
+    public async Task PlayCmd([Remainder] string song)
+    {
+        await _service.SendAudioAsync(Context.Guild, Context.Channel, song);
+    }
+}

Commands/TicTacToe.cs

@@ -88,7 +88,7 @@ namespace dotbot.Commands
             return true;
         }
 
-        internal async string DoMove(SocketUserMessage msg)
+        internal async Task<string> DoMove(SocketUserMessage msg)
         {
             if (!Active || Players[Turn] != msg.Author.Id) return "";
 

Program.cs

@@ -43,6 +43,7 @@ namespace dotbot
                 .AddSingleton<PollService>()
                 .AddSingleton<HangmanService>()
                 .AddSingleton<TicTacToeService>()
+                .AddSingleton<AudioService>()
                 .AddSingleton<Random>()
                 .AddSingleton(_config);
 

Services/AudioService.cs

@@ -0,0 +1,80 @@
+//////////////////////////////////////////////////////////////////////
+// https://gist.github.com/Joe4evr/773d3ce6cc10dbea6924d59bbfa3c62a //
+//////////////////////////////////////////////////////////////////////
+
+using System.Collections.Concurrent;
+using System.Diagnostics;
+using System.IO;
+using System.Threading.Tasks;
+using Discord;
+using Discord.Audio;
+
+public class AudioService
+{
+    private readonly ConcurrentDictionary<ulong, IAudioClient> ConnectedChannels = new ConcurrentDictionary<ulong, IAudioClient>();
+
+
+    public async Task JoinAudio(IGuild guild, IVoiceChannel target)
+    {
+        if (ConnectedChannels.TryGetValue(guild.Id, out IAudioClient client))
+        {
+            return;
+        }
+        if (target.Guild.Id != guild.Id)
+        {
+            return;
+        }
+
+        var audioClient = await target.ConnectAsync();
+
+        if (ConnectedChannels.TryAdd(guild.Id, audioClient))
+        {
+            // If you add a method to log happenings from this service,
+            // you can uncomment these commented lines to make use of that.
+            //await Log(LogSeverity.Info, $"Connected to voice on {guild.Name}.");
+        }
+    }
+
+
+    public async Task LeaveAudio(IGuild guild)
+    {
+        if (ConnectedChannels.TryRemove(guild.Id, out IAudioClient client))
+        {
+            await client.StopAsync();
+            //await Log(LogSeverity.Info, $"Disconnected from voice on {guild.Name}.");
+        }
+    }
+
+
+    public async Task SendAudioAsync(IGuild guild, IMessageChannel channel, string path)
+    {
+        // Your task: Get a full path to the file if the value of 'path' is only a filename.
+        if (!File.Exists(path))
+        {
+            await channel.SendMessageAsync("File does not exist.");
+            return;
+        }
+        if (ConnectedChannels.TryGetValue(guild.Id, out IAudioClient client))
+        {
+            //await Log(LogSeverity.Debug, $"Starting playback of {path} in {guild.Name}");
+            using (var output = CreateStream(path).StandardOutput.BaseStream)
+            using (var stream = client.CreatePCMStream(AudioApplication.Music))
+            {
+                try { await output.CopyToAsync(stream); }
+                finally { await stream.FlushAsync(); }
+            }
+        }
+    }
+
+
+    private Process CreateStream(string path)
+    {
+        return Process.Start(new ProcessStartInfo
+        {
+            FileName = "ytdl-bin/ffmpeg.exe",
+            Arguments = $"-hide_banner -loglevel panic -i \"{path}\" -ac 2 -f s16le -ar 48000 pipe:1",
+            UseShellExecute = false,
+            RedirectStandardOutput = true
+        });
+    }
+}

Services/TicTacToeService.cs

@@ -26,7 +26,7 @@ namespace dotbot.Services
             if (_activeGames.ContainsKey(id))
             {
                 var game = _activeGames[id];
-                await context.Channel.SendMessageAsync($"{game.DoMove(msg)}\n\n{game}");
+                await context.Channel.SendMessageAsync($"{game.DoMove(msg).Result}\n\n{game}");
             }
         }
 

dotbot.csproj

@@ -19,6 +19,12 @@
     <DotNetCliToolReference Include="Microsoft.EntityFrameworkCore.Tools.DotNet" Version="2.0.0" />
   </ItemGroup>
   <ItemGroup>
+    <None Update="ytdl-bin\ffmpeg.exe">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
+    <None Update="ytdl-bin\youtube-dl.exe">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
     <None Update="_config.json">
       <CopyToOutputDirectory>Always</CopyToOutputDirectory>
     </None>