move WebSocket listeners to Jellyfin.Api

Jellyfin.Api/WebSocketListeners/ActivityLogWebSocketListener.cs

@@ -0,0 +1,60 @@
+using System;
+using System.Threading.Tasks;
+using MediaBrowser.Controller.Net;
+using MediaBrowser.Model.Activity;
+using MediaBrowser.Model.Events;
+using Microsoft.Extensions.Logging;
+
+namespace Jellyfin.Api.WebSocketListeners
+{
+    /// <summary>
+    /// Class SessionInfoWebSocketListener.
+    /// </summary>
+    public class ActivityLogWebSocketListener : BasePeriodicWebSocketListener<ActivityLogEntry[], WebSocketListenerState>
+    {
+        /// <summary>
+        /// The _kernel.
+        /// </summary>
+        private readonly IActivityManager _activityManager;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ActivityLogWebSocketListener"/> class.
+        /// </summary>
+        /// <param name="logger">Instance of the <see cref="ILogger{ActivityLogWebSocketListener}"/> interface.</param>
+        /// <param name="activityManager">Instance of the <see cref="IActivityManager"/> interface.</param>
+        public ActivityLogWebSocketListener(ILogger<ActivityLogWebSocketListener> logger, IActivityManager activityManager)
+            : base(logger)
+        {
+            _activityManager = activityManager;
+            _activityManager.EntryCreated += OnEntryCreated;
+        }
+
+        /// <summary>
+        /// Gets the name.
+        /// </summary>
+        /// <value>The name.</value>
+        protected override string Name => "ActivityLogEntry";
+
+        /// <summary>
+        /// Gets the data to send.
+        /// </summary>
+        /// <returns>Task{SystemInfo}.</returns>
+        protected override Task<ActivityLogEntry[]> GetDataToSend()
+        {
+            return Task.FromResult(Array.Empty<ActivityLogEntry>());
+        }
+
+        /// <inheritdoc />
+        protected override void Dispose(bool dispose)
+        {
+            _activityManager.EntryCreated -= OnEntryCreated;
+
+            base.Dispose(dispose);
+        }
+
+        private void OnEntryCreated(object sender, GenericEventArgs<ActivityLogEntry> e)
+        {
+            SendData(true);
+        }
+    }
+}