Add audio stuff back

Geekbot.net/Lib/Audio/AudioUtils.cs

@@ -0,0 +1,96 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Net;
+using Discord.Audio;
+
+namespace Geekbot.net.Lib.Audio
+{
+    public class AudioUtils : IAudioUtils
+    {
+        private string _tempFolderPath;
+        private Dictionary<ulong, IAudioClient> _audioClients;
+
+        public AudioUtils()
+        {
+            _audioClients = new Dictionary<ulong, IAudioClient>();
+            _tempFolderPath = Path.GetFullPath("./tmp/");
+            if (Directory.Exists(_tempFolderPath))
+            {
+                Directory.Delete(_tempFolderPath, true);
+            }
+            Directory.CreateDirectory(_tempFolderPath);
+        }
+        
+        public IAudioClient GetAudioClient(ulong guildId)
+        {
+            return _audioClients[guildId];
+        }
+
+        public void StoreAudioClient(ulong guildId, IAudioClient client)
+        {
+            _audioClients[guildId] = client;
+        }
+        
+        public Process CreateStreamFromFile(string path)
+        {
+            var ffmpeg = new ProcessStartInfo
+            {
+                FileName = "ffmpeg",
+                Arguments = $"-i {path} -ac 2 -f s16le -ar 48000 pipe:1",
+                UseShellExecute = false,
+                RedirectStandardOutput = true,
+            };
+            return Process.Start(ffmpeg);
+        }
+
+        public Process CreateStreamFromYoutube(string url, ulong guildId)
+        {
+            var ytdlMediaUrl = GetYoutubeMediaUrl(url);
+            DownloadMediaUrl(ytdlMediaUrl, guildId);
+            return CreateStreamFromFile($"{_tempFolderPath}{guildId}");
+        }
+
+        public void Cleanup(ulong guildId)
+        {
+            File.Delete($"{_tempFolderPath}{guildId}");
+        }
+
+        private string GetYoutubeMediaUrl(string url)
+        {
+            var ytdl = new ProcessStartInfo()
+            {
+                FileName = "youtube-dl",
+                Arguments = $"-f bestaudio -g {url}",
+                UseShellExecute = false,
+                RedirectStandardOutput = true
+            };
+            var output = Process.Start(ytdl).StandardOutput.ReadToEnd();
+            if (string.IsNullOrWhiteSpace(output))
+            {
+                throw new Exception("Could not get Youtube Media URL");
+            }
+            return output;
+        }
+
+        private void DownloadMediaUrl(string url, ulong guildId)
+        {
+            using (var web = new WebClient())
+            {
+                web.DownloadFile(url, $"{_tempFolderPath}{guildId}");
+            }
+//            var ffmpeg = new ProcessStartInfo
+//            {
+//                FileName = "ffmpeg",
+//                Arguments = $"-i \"{_tempFolderPath}{guildId}\" -c:a mp3 -b:a 256k {_tempFolderPath}{guildId}.mp3",
+//                UseShellExecute = false,
+//                RedirectStandardOutput = true,
+//            };
+//            Process.Start(ffmpeg).WaitForExit();
+//            File.Delete($"{_tempFolderPath}{guildId}");
+            return;
+        }
+
+    }
+}

Geekbot.net/Lib/Audio/IAudioUtils.cs

@@ -0,0 +1,15 @@
+using System.Diagnostics;
+using Discord.Audio;
+
+namespace Geekbot.net.Lib.Audio
+{
+    public interface IAudioUtils
+    {
+        IAudioClient GetAudioClient(ulong guildId);
+        void StoreAudioClient(ulong guildId, IAudioClient client);
+        Process CreateStreamFromFile(string path);
+        Process CreateStreamFromYoutube(string url, ulong guildId);
+        void Cleanup(ulong guildId);
+
+    }
+}