- Re-added .qap / .queueautoplay

- Several strings and commands related to music have been changed
  - Changed .ms / .movesong to .tm / .trackmove but kept old aliases
  - Changed ~~song~~ -> 	rack throughout music module strings
- Updated CHANGELOG.md

src/NadekoBot/Modules/Music/_Common/IMusicPlayer.cs

@@ -10,6 +10,7 @@ public interface IMusicPlayer : IDisposable
     bool IsKilled { get; }
     int CurrentIndex { get; }
     public PlayerRepeatType Repeat { get; }
+    bool AutoPlay { get; set; }
 
     void Stop();
     void Clear();

src/NadekoBot/Modules/Music/_Common/ITrackInfo.cs

@@ -2,6 +2,7 @@
 
 public interface ITrackInfo
 {
+    public string Id => string.Empty;
     public string Title { get; }
     public string Url { get; }
     public string Thumbnail { get; }

src/NadekoBot/Modules/Music/_Common/Impl/MusicPlayer.cs

@@ -28,6 +28,7 @@ public sealed class MusicPlayer : IMusicPlayer
     private readonly IMusicQueue _queue;
     private readonly ITrackResolveProvider _trackResolveProvider;
     private readonly IVoiceProxy _proxy;
+    private readonly IGoogleApiService _googleApiService;
     private readonly ISongBuffer _songBuffer;
 
     private bool skipped;
@@ -35,15 +36,21 @@ public sealed class MusicPlayer : IMusicPlayer
     private readonly Thread _thread;
     private readonly Random _rng;
 
+    public bool AutoPlay { get; set; }
+
     public MusicPlayer(
         IMusicQueue queue,
         ITrackResolveProvider trackResolveProvider,
         IVoiceProxy proxy,
-        QualityPreset qualityPreset)
+        IGoogleApiService googleApiService,
+        QualityPreset qualityPreset,
+        bool autoPlay)
     {
         _queue = queue;
         _trackResolveProvider = trackResolveProvider;
         _proxy = proxy;
+        _googleApiService = googleApiService;
+        AutoPlay = autoPlay;
         _rng = new NadekoRandom();
 
         _vc = GetVoiceClient(qualityPreset);
@@ -265,7 +272,29 @@ public sealed class MusicPlayer : IMusicPlayer
             {
                 cancellationTokenSource.Cancel();
                 // turn off green in vc
+
                 _ = OnCompleted?.Invoke(this, track);
+                
+                // todo update when settings are changed
+                if (AutoPlay && track.Platform == MusicPlatform.Youtube)
+                {
+                    try
+                    {
+                        var relatedSongs = await _googleApiService.GetRelatedVideosAsync(track.TrackInfo.Id, 5);
+                        var related = relatedSongs.Shuffle().FirstOrDefault();
+                        if (related is not null)
+                        {
+                            var relatedTrack = await _trackResolveProvider.QuerySongAsync(related, MusicPlatform.Youtube);
+                            if (relatedTrack is not null)
+                                EnqueueTrack(relatedTrack, "Autoplay");
+                        }
+                    }
+                    catch (Exception ex)
+                    {
+                        Log.Warning(ex, "Failed queueing a related song via autoplay");
+                    }
+                }
+
 
                 HandleQueuePostTrack();
                 skipped = false;

src/NadekoBot/Modules/Music/_Common/Impl/RemoteTrackInfo.cs

@@ -1,30 +1,15 @@
 namespace NadekoBot.Modules.Music;
 
-public sealed class RemoteTrackInfo : ITrackInfo
+public sealed record RemoteTrackInfo(
+    string Id,
+    string Title,
+    string Url,
+    string Thumbnail,
+    TimeSpan Duration,
+    MusicPlatform Platform,
+    Func<Task<string?>> _streamFactory) : ITrackInfo
 {
-    public string Title { get; }
-    public string Url { get; }
-    public string Thumbnail { get; }
-    public TimeSpan Duration { get; }
-    public MusicPlatform Platform { get; }
-
-    private readonly Func<Task<string?>> _streamFactory;
-
-    public RemoteTrackInfo(
-        string title,
-        string url,
-        string thumbnail,
-        TimeSpan duration,
-        MusicPlatform platform,
-        Func<Task<string?>> streamFactory)
-    {
-        _streamFactory = streamFactory;
-        Title = title;
-        Url = url;
-        Thumbnail = thumbnail;
-        Duration = duration;
-        Platform = platform;
-    }
+    private readonly Func<Task<string?>> _streamFactory = _streamFactory;
 
     public async ValueTask<string?> GetStreamUrl()
         => await _streamFactory();

src/NadekoBot/Modules/Music/_Common/Resolvers/YtdlYoutubeResolver.cs

@@ -94,7 +94,9 @@ public sealed class YtdlYoutubeResolver : IYoutubeResolver
     }
 
     private ITrackInfo DataToInfo(in YtTrackData trackData)
-        => new RemoteTrackInfo(trackData.Title,
+        => new RemoteTrackInfo(
+            trackData.Id,
+            trackData.Title,
             $"https://youtube.com/watch?v={trackData.Id}",
             trackData.Thumbnail,
             trackData.Duration,