added a shutdown api method, font size fix and other decouplings

MediaBrowser.Common/Kernel/IServerManager.cs

@@ -0,0 +1,54 @@
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace MediaBrowser.Common.Kernel
+{
+    public interface IServerManager : IDisposable
+    {
+        /// <summary>
+        /// Gets a value indicating whether [supports web socket].
+        /// </summary>
+        /// <value><c>true</c> if [supports web socket]; otherwise, <c>false</c>.</value>
+        bool SupportsNativeWebSocket { get; }
+
+        /// <summary>
+        /// Gets the web socket port number.
+        /// </summary>
+        /// <value>The web socket port number.</value>
+        int WebSocketPortNumber { get; }
+
+        /// <summary>
+        /// Starts this instance.
+        /// </summary>
+        void Start();
+
+        /// <summary>
+        /// Sends a message to all clients currently connected via a web socket
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="messageType">Type of the message.</param>
+        /// <param name="data">The data.</param>
+        /// <returns>Task.</returns>
+        void SendWebSocketMessage<T>(string messageType, T data);
+
+        /// <summary>
+        /// Sends a message to all clients currently connected via a web socket
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="messageType">Type of the message.</param>
+        /// <param name="dataFunction">The function that generates the data to send, if there are any connected clients</param>
+        void SendWebSocketMessage<T>(string messageType, Func<T> dataFunction);
+
+        /// <summary>
+        /// Sends a message to all clients currently connected via a web socket
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <param name="messageType">Type of the message.</param>
+        /// <param name="dataFunction">The function that generates the data to send, if there are any connected clients</param>
+        /// <param name="cancellationToken">The cancellation token.</param>
+        /// <returns>Task.</returns>
+        /// <exception cref="System.ArgumentNullException">messageType</exception>
+        Task SendWebSocketMessageAsync<T>(string messageType, Func<T> dataFunction, CancellationToken cancellationToken);
+    }
+}