goto almost done, enabled experimental flags for C#7 preview support

NadekoBot/Modules/Music/Classes/MusicControls.cs

@@ -175,6 +175,14 @@ namespace NadekoBot.Modules.Music.Classes
             }
         }
 
+        public void AddSong(Song s, int index) {
+            if (s == null)
+                throw new ArgumentNullException(nameof(s));
+            lock (playlistLock) {
+                playlist.Insert(index, s);
+            }
+        }
+
         public void RemoveSong(Song s)
         {
             if (s == null)

NadekoBot/Modules/Music/Classes/Song.cs

@@ -43,11 +43,30 @@ namespace NadekoBot.Modules.Music.Classes
 
         private ulong bytesSent { get; set; } = 0;
 
+        public bool PrintStatusMessage { get; set; } = true;
+
+        private int skipTo = 0;
+        public int SkipTo {
+            get { return SkipTo; }
+            set {
+                skipTo = value;
+                bytesSent = (ulong)skipTo * 3840 * 50;
+            }
+        }
+
         private Song(SongInfo songInfo)
         {
             this.SongInfo = songInfo;
         }
 
+        public Song Clone()
+        {
+            var s = new Song(SongInfo);
+            s.MusicPlayer = MusicPlayer;
+            s.State = StreamState.Queued;
+            return s;
+        }
+
         private Task BufferSong(CancellationToken cancelToken) =>
             Task.Factory.StartNew(async () =>
             {
@@ -57,7 +76,7 @@ namespace NadekoBot.Modules.Music.Classes
                     p = Process.Start(new ProcessStartInfo
                     {
                         FileName = "ffmpeg",
-                        Arguments = $"-i {SongInfo.Uri} -f s16le -ar 48000 -ac 2 pipe:1 -loglevel quiet",
+                        Arguments = $"-ss {skipTo} -i {SongInfo.Uri} -f s16le -ar 48000 -ac 2 pipe:1 -loglevel quiet",
                         UseShellExecute = false,
                         RedirectStandardOutput = true,
                         RedirectStandardError = false,

NadekoBot/Modules/Music/MusicModule.cs

@@ -1,8 +1,8 @@
 using Discord;
 using Discord.Commands;
 using Discord.Modules;
-using NadekoBot.DataModels;
 using NadekoBot.Classes;
+using NadekoBot.DataModels;
 using NadekoBot.Extensions;
 using NadekoBot.Modules.Music.Classes;
 using NadekoBot.Modules.Permissions.Classes;
@@ -534,6 +534,42 @@ namespace NadekoBot.Modules.Music
                             }
                         }
                     });
+
+                cgb.CreateCommand("goto")
+                    .Description("Goes to a specific time in seconds in a song.")
+                    .Parameter("time")
+                    .Do(async e =>
+                    {
+                        var skipToStr = e.GetArg("time")?.Trim();
+                        MusicPlayer musicPlayer;
+                        if (!MusicPlayers.TryGetValue(e.Server, out musicPlayer))
+                            return;
+
+                        int skipTo;
+                        if (!int.TryParse(skipToStr, out skipTo) || skipTo < 0)
+                            return;
+
+                        var currentSong = musicPlayer.CurrentSong;
+
+                        if (currentSong == null)
+                            return;
+
+                        //currentSong.PrintStatusMessage = false;
+                        var gotoSong = currentSong.Clone();
+                        gotoSong.SkipTo = skipTo;
+                        musicPlayer.AddSong(gotoSong, 0);
+                        musicPlayer.Next();
+
+                        var minutes = (skipTo / 60).ToString();
+                        var seconds = (skipTo % 60).ToString();
+
+                        if (minutes.Length == 1)
+                            minutes = "0" + minutes;
+                        if (seconds.Length == 1)
+                            seconds = "0" + seconds;
+
+                        await e.Channel.SendMessage($"`Skipped to {minutes}:{seconds}`");
+                    });
             });
         }
 
@@ -560,6 +596,8 @@ namespace NadekoBot.Modules.Music
                 Message playingMessage = null;
                 Message lastFinishedMessage = null;
                 mp.OnCompleted += async (s, song) =>
+                {
+                    if (song.PrintStatusMessage)
                     {
                         try
                         {
@@ -570,18 +608,24 @@ namespace NadekoBot.Modules.Music
                             lastFinishedMessage = await textCh.SendMessage($"🎵`Finished`{song.PrettyName}");
                         }
                         catch { }
+                    }
                 };
                 mp.OnStarted += async (s, song) =>
+                {
+                    if (song.PrintStatusMessage)
                     {
                         var sender = s as MusicPlayer;
                         if (sender == null)
                             return;
+
                         try
                         {
+
                             var msgTxt = $"🎵`Playing`{song.PrettyName} `Vol: {(int)(sender.Volume * 100)}%`";
                             playingMessage = await textCh.SendMessage(msgTxt);
                         }
                         catch { }
+                    }
                 };
                 return mp;
             });

NadekoBot/NadekoBot.csproj

@@ -40,7 +40,7 @@
     <DebugType>full</DebugType>
     <Optimize>false</Optimize>
     <OutputPath>bin\Debug\</OutputPath>
-    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <DefineConstants>TRACE;DEBUG;__DEMO__,__DEMO_EXPERIMENTAL__</DefineConstants>
     <ErrorReport>prompt</ErrorReport>
     <WarningLevel>4</WarningLevel>
     <Prefer32Bit>true</Prefer32Bit>