Added hermes websocket support. Added chat command support. Added selectable voice command via websocket. Added websocket heartbeat management.

Chat/Commands/Parameters/ChatCommandParameter.cs

@@ -0,0 +1,17 @@
+namespace TwitchChatTTS.Chat.Commands.Parameters
+{
+    public abstract class ChatCommandParameter
+    {
+        public string Name { get; }
+        public string Description { get; }
+        public bool Optional { get; }
+
+        public ChatCommandParameter(string name, string description, bool optional = false) {
+            Name = name;
+            Description = description;
+            Optional = optional;
+        }
+
+        public abstract bool Validate(string value);
+    }
+}

Chat/Commands/Parameters/TTSVoiceNameParameter.cs

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+using Microsoft.Extensions.DependencyInjection;
+namespace TwitchChatTTS.Chat.Commands.Parameters
+{
+    public class TTSVoiceNameParameter : ChatCommandParameter
+    {
+        private IServiceProvider _serviceProvider;
+
+        public TTSVoiceNameParameter(IServiceProvider serviceProvider, bool optional = false) : base("TTS Voice Name", "Name of a TTS voice", optional)
+        {
+            _serviceProvider = serviceProvider;
+        }
+
+        public override bool Validate(string value)
+        {
+            var user = _serviceProvider.GetRequiredService<User>();
+            if (user.VoicesAvailable == null)
+                return false;
+
+            value = value.ToLower();
+            return user.VoicesAvailable.Any(e => e.Value.ToLower() == value);
+        }
+    }
+}

Chat/Commands/Parameters/UnvalidatedParameter.cs

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+namespace TwitchChatTTS.Chat.Commands.Parameters
+{
+    public class UnvalidatedParameter : ChatCommandParameter
+    {
+        public UnvalidatedParameter(bool optional = false) : base("TTS Voice Name", "Name of a TTS voice", optional)
+        {
+        }
+
+        public override bool Validate(string value)
+        {
+            return true;
+        }
+    }
+}