Add support for channel.chat.notification

Add support for channel.chat.notification
Also fixed format to match TwitchLib formatting

Author: MrLawbreaker

TwitchLib.EventSub.Websockets/Core/EventArgs/Channel/ChannelChatNotificationArgs.cs

@@ -0,0 +1,8 @@
+using TwitchLib.EventSub.Core.SubscriptionTypes.Channel;
+using TwitchLib.EventSub.Websockets.Core.Models;
+namespace TwitchLib.EventSub.Websockets.Core.EventArgs.Channel
+{
+    public class ChannelChatNotificationArgs : TwitchLibEventSubEventArgs<EventSubNotification<ChannelChatNotification>>
+    {
+    }
+}

TwitchLib.EventSub.Websockets/EventSubWebsocketClient.cs

@@ -81,6 +81,10 @@ public class EventSubWebsocketClient
         /// </summary>
         public event AsyncEventHandler<ChannelChatMessageDeleteArgs> ChannelChatMessageDelete;
         /// <summary>
+        /// Event that triggers on "channel.chat.notification" notifications
+        /// </summary>
+        public event AsyncEventHandler<ChannelChatNotificationArgs> ChannelChatNotification;
+        /// <summary>
         /// Event that triggers on "channel.cheer" notifications
         /// </summary>
         public event AsyncEventHandler<ChannelCheerArgs> ChannelCheer;

TwitchLib.EventSub.Websockets/Handler/Channel/Chat/ChatMessageDeleteHandler.cs

@@ -12,7 +12,7 @@ public class ChatMessageDeleteHandler : INotificationHandler
     {
         public string SubscriptionType => "channel.chat.message_delete";
 
-        public void Handle ( EventSubWebsocketClient client, string jsonString, JsonSerializerOptions serializerOptions )
+        public void Handle(EventSubWebsocketClient client, string jsonString, JsonSerializerOptions serializerOptions)
         {
             try
             {

TwitchLib.EventSub.Websockets/Handler/Channel/Chat/ChatNotificationHandler.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Text.Json;
+using TwitchLib.EventSub.Core.SubscriptionTypes.Channel;
+using TwitchLib.EventSub.Websockets.Core.EventArgs;
+using TwitchLib.EventSub.Websockets.Core.EventArgs.Channel;
+using TwitchLib.EventSub.Websockets.Core.Handler;
+using TwitchLib.EventSub.Websockets.Core.Models;
+
+namespace TwitchLib.EventSub.Websockets.Handler.Channel.Chat
+{
+    public class ChatNotificationHandler : INotificationHandler
+    {
+        public string SubscriptionType => "channel.chat.notification";
+
+        public void Handle(EventSubWebsocketClient client, string jsonString, JsonSerializerOptions serializerOptions)
+        {
+            try
+            {
+                var data = JsonSerializer.Deserialize<EventSubNotification<ChannelChatNotification>>(jsonString.AsSpan(), serializerOptions);
+                if (data is null)
+                    throw new InvalidOperationException("Parsed JSON cannot be null!");
+                client.RaiseEvent("ChannelChatNotification", new ChannelChatNotificationArgs { Notification = data });
+            }
+            catch (Exception ex)
+            {
+                client.RaiseEvent("ErrorOccurred", new ErrorOccuredArgs { Exception = ex, Message = $"Error encountered while trying to handle {SubscriptionType} notification! Raw Json: {jsonString}" });
+            }
+        }
+    }
+}