* Added protection from NotImplementedException to HandlerBuilderBase

* Moved AddHandler<T> and AddHandler(Type) methods from IHandlersCollection to extension methods
* Added public constructor to IHost types form extensibility
* Code cleanup

Telegrator.Hosting.Web/TelegramBotWebHost.cs

@@ -55,10 +55,15 @@ namespace Telegrator.Hosting.Web
         IFeatureCollection IApplicationBuilder.ServerFeatures => ((IApplicationBuilder)_innerApp).ServerFeatures;
         IDictionary<string, object?> IApplicationBuilder.Properties => ((IApplicationBuilder)_innerApp).Properties;
 
-        internal TelegramBotWebHost(WebApplicationBuilder webApplicationBuilder, HostHandlersCollection handlers)
+        /// <summary>
+        /// Initializes a new instance of the <see cref="WebApplicationBuilder"/> class.
+        /// </summary>
+        /// <param name="webApplicationBuilder">The proxied instance of host builder.</param>
+        /// <param name="handlers"></param>
+        public TelegramBotWebHost(WebApplicationBuilder webApplicationBuilder, IHandlersCollection handlers)
         {
             // Registering this host in services for easy access
-            RegisterHostServices(webApplicationBuilder, handlers);
+            RegisterHostServices(webApplicationBuilder.Services, handlers);
 
             // Building proxy application
             _innerApp = webApplicationBuilder.Build();
@@ -172,7 +177,7 @@ namespace Telegrator.Hosting.Web
             _disposed = true;
         }
 
-        private void LogHandlers(HostHandlersCollection handlers)
+        private void LogHandlers(IHandlersCollection handlers)
         {
             StringBuilder logBuilder = new StringBuilder("Registered handlers : ");
             if (!handlers.Keys.Any())
@@ -194,15 +199,15 @@ namespace Telegrator.Hosting.Web
             Logger.LogInformation(logBuilder.ToString());
         }
 
-        private void RegisterHostServices(WebApplicationBuilder hostApplicationBuilder, HostHandlersCollection handlers)
+        private void RegisterHostServices(IServiceCollection service, IHandlersCollection handlers)
         {
-            //hostApplicationBuilder.Services.RemoveAll<IHost>();
-            //hostApplicationBuilder.Services.AddSingleton<IHost>(this);
+            //service.RemoveAll<IHost>();
+            //service.AddSingleton<IHost>(this);
 
-            hostApplicationBuilder.Services.AddSingleton<ITelegramBotHost>(this);
-            hostApplicationBuilder.Services.AddSingleton<ITelegramBotWebHost>(this);
-            hostApplicationBuilder.Services.AddSingleton<ITelegratorBot>(this);
-            hostApplicationBuilder.Services.AddSingleton<IHandlersCollection>(handlers);
+            service.AddSingleton<ITelegramBotHost>(this);
+            service.AddSingleton<ITelegramBotWebHost>(this);
+            service.AddSingleton<ITelegratorBot>(this);
+            service.AddSingleton<IHandlersCollection>(handlers);
         }
     }
 }

Telegrator.Hosting.Web/TelegramBotWebHostBuilder.cs

@@ -5,10 +5,10 @@ using Microsoft.Extensions.Hosting;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
 using Telegram.Bot;
-using Telegram.Bot.Polling;
 using Telegrator.Hosting.Components;
 using Telegrator.Hosting.Configuration;
 using Telegrator.Hosting.Providers;
+using Telegrator.Hosting.Providers.Components;
 using Telegrator.MadiatorCore;
 
 #pragma warning disable IDE0001
@@ -21,7 +21,7 @@ namespace Telegrator.Hosting.Web
     {
         private readonly WebApplicationBuilder _innerBuilder;
         private readonly TelegramBotWebOptions _settings;
-        private readonly HostHandlersCollection _handlers;
+        private readonly IHandlersCollection _handlers;
 
         /// <inheritdoc/>
         public IHandlersCollection Handlers => _handlers;
@@ -38,28 +38,49 @@ namespace Telegrator.Hosting.Web
         /// <inheritdoc/>
         public IHostEnvironment Environment => _innerBuilder.Environment;
 
-        internal TelegramBotWebHostBuilder(WebApplicationBuilder webApplicationBuilder, TelegramBotWebOptions settings)
+        /// <summary>
+        /// Initializes a new instance of the <see cref="TelegramBotWebHostBuilder"/> class.
+        /// </summary>
+        /// <param name="webApplicationBuilder"></param>
+        /// <param name="settings"></param>
+        public TelegramBotWebHostBuilder(WebApplicationBuilder webApplicationBuilder, TelegramBotWebOptions settings)
         {
-            _innerBuilder = webApplicationBuilder;
+            _innerBuilder = webApplicationBuilder ?? throw new ArgumentNullException(nameof(webApplicationBuilder));
             _settings = settings ?? throw new ArgumentNullException(nameof(settings));
             _handlers = new HostHandlersCollection(Services, _settings);
         }
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="TelegramBotWebHostBuilder"/> class.
+        /// </summary>
+        /// <param name="webApplicationBuilder"></param>
+        /// <param name="handlers"></param>
+        /// <param name="settings"></param>
+        public TelegramBotWebHostBuilder(WebApplicationBuilder webApplicationBuilder, TelegramBotWebOptions settings, IHandlersCollection handlers)
+        {
+            _innerBuilder = webApplicationBuilder ?? throw new ArgumentNullException(nameof(webApplicationBuilder));
+            _settings = settings ?? throw new ArgumentNullException(nameof(settings));
+            _handlers = handlers ?? throw new ArgumentNullException(nameof(settings));
+        }
+
         /// <summary>
         /// Builds the host.
         /// </summary>
         /// <returns></returns>
         public TelegramBotWebHost Build()
         {
-            foreach (PreBuildingRoutine preBuildRoutine in _handlers.PreBuilderRoutines)
+            if (_handlers is IHostHandlersCollection hostHandlers)
             {
-                try
+                foreach (PreBuildingRoutine preBuildRoutine in hostHandlers.PreBuilderRoutines)
                 {
-                    preBuildRoutine.Invoke(this);
-                }
-                catch (NotImplementedException)
-                {
-                    _ = 0xBAD + 0xC0DE;
+                    try
+                    {
+                        preBuildRoutine.Invoke(this);
+                    }
+                    catch (NotImplementedException)
+                    {
+                        _ = 0xBAD + 0xC0DE;
+                    }
                 }
             }