Websocket refactoring (#190)

Websocket refactoring

CryptoExchange.Net/Clients/CryptoBaseClient.cs

@@ -0,0 +1,67 @@
+using Microsoft.Extensions.DependencyInjection;
+using System;
+using System.Collections.Generic;
+
+namespace CryptoExchange.Net.Clients
+{
+    /// <summary>
+    /// Base crypto client
+    /// </summary>
+    public class CryptoBaseClient : IDisposable
+    {
+        private Dictionary<Type, object> _serviceCache = new Dictionary<Type, object>();
+
+        /// <summary>
+        /// Service provider
+        /// </summary>
+        protected readonly IServiceProvider? _serviceProvider;
+
+        /// <summary>
+        /// ctor
+        /// </summary>
+        public CryptoBaseClient() { }
+
+        /// <summary>
+        /// ctor
+        /// </summary>
+        /// <param name="serviceProvider"></param>
+        public CryptoBaseClient(IServiceProvider serviceProvider)
+        {
+            _serviceProvider = serviceProvider;
+            _serviceCache = new Dictionary<Type, object>();
+        }
+
+        /// <summary>
+        /// Try get a client by type for the service collection
+        /// </summary>
+        /// <typeparam name="T"></typeparam>
+        /// <returns></returns>
+        public T TryGet<T>(Func<T> createFunc)
+        {
+            var type = typeof(T);
+            if (_serviceCache.TryGetValue(type, out var value))
+                return (T)value;
+
+            if (_serviceProvider == null)
+            {
+                // Create with default options
+                var createResult = createFunc();
+                _serviceCache.Add(typeof(T), createResult!);
+                return createResult;
+            }
+
+            var result = _serviceProvider.GetService<T>() 
+                ?? throw new InvalidOperationException($"No service was found for {typeof(T).Name}, make sure the exchange is registered in dependency injection with the `services.Add[Exchange]()` method");
+            _serviceCache.Add(type, result!);
+            return result;
+        }
+
+        /// <summary>
+        /// Dispose
+        /// </summary>
+        public void Dispose()
+        {
+            _serviceCache.Clear();
+        }
+    }
+}