Refactor options and add options builder

MQTTnet.Core/ManagedClient/IManagedMqttClient.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using MQTTnet.Core.Client;
+
+namespace MQTTnet.Core.ManagedClient
+{
+    public interface IManagedMqttClient : IApplicationMessageReceiver, IApplicationMessagePublisher
+    {
+        bool IsConnected { get; }
+
+        event EventHandler<MqttClientConnectedEventArgs> Connected;
+        event EventHandler<MqttClientDisconnectedEventArgs> Disconnected;
+
+        Task StartAsync(IManagedMqttClientOptions options);
+        Task StopAsync();
+
+        Task SubscribeAsync(IEnumerable<TopicFilter> topicFilters);
+        Task UnsubscribeAsync(IEnumerable<TopicFilter> topicFilters);
+    }
+}

MQTTnet.Core/ManagedClient/ManagedMqttClient.cs

@@ -11,7 +11,7 @@ using Microsoft.Extensions.Logging;
 
 namespace MQTTnet.Core.ManagedClient
 {
-    public class ManagedMqttClient : IApplicationMessageReceiver
+    public class ManagedMqttClient : IManagedMqttClient
     {
         private readonly ManagedMqttClientStorageManager _storageManager = new ManagedMqttClientStorageManager();
         private readonly BlockingCollection<MqttApplicationMessage> _messageQueue = new BlockingCollection<MqttApplicationMessage>();
@@ -91,7 +91,7 @@ namespace MQTTnet.Core.ManagedClient
             return Task.FromResult(0);
         }
 
-        public Task EnqueueAsync(IEnumerable<MqttApplicationMessage> applicationMessages)
+        public Task PublishAsync(IEnumerable<MqttApplicationMessage> applicationMessages)
         {
             if (applicationMessages == null) throw new ArgumentNullException(nameof(applicationMessages));