* hotfix of aspects inspection

* Added IHandlersManager. interface that allows both collecting and providing handlers

Telegrator.Hosting.Web/TelegramBotWebHost.cs

@@ -3,17 +3,14 @@ using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Http.Features;
 using Microsoft.AspNetCore.Routing;
 using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.DependencyInjection.Extensions;
 using Microsoft.Extensions.Hosting;
 using Microsoft.Extensions.Logging;
-using Microsoft.Extensions.Options;
 using System.Text;
 using Telegram.Bot.Types.Enums;
 using Telegrator.Configuration;
 using Telegrator.Hosting.Components;
-using Telegrator.Hosting.Providers;
 using Telegrator.Hosting.Web.Components;
-using Telegrator.Hosting.Logging;
-using Telegrator.Logging;
 using Telegrator.MadiatorCore;
 using Telegrator.MadiatorCore.Descriptors;
 
@@ -199,15 +196,22 @@ namespace Telegrator.Hosting.Web
             Logger.LogInformation(logBuilder.ToString());
         }
 
-        private void RegisterHostServices(IServiceCollection service, IHandlersCollection handlers)
+        private void RegisterHostServices(IServiceCollection services, IHandlersCollection handlers)
         {
             //service.RemoveAll<IHost>();
             //service.AddSingleton<IHost>(this);
 
-            service.AddSingleton<ITelegramBotHost>(this);
-            service.AddSingleton<ITelegramBotWebHost>(this);
-            service.AddSingleton<ITelegratorBot>(this);
-            service.AddSingleton<IHandlersCollection>(handlers);
+            services.AddSingleton<ITelegramBotHost>(this);
+            services.AddSingleton<ITelegramBotWebHost>(this);
+            services.AddSingleton<ITelegratorBot>(this);
+            services.AddSingleton(handlers);
+
+            if (handlers is IHandlersManager manager)
+            {
+                services.RemoveAll<IHandlersProvider>();
+                services.AddSingleton<IHandlersProvider>(manager);
+                services.AddSingleton(manager);
+            }
         }
     }
 }

Telegrator.Hosting.Web/Telegrator.Hosting.Web.csproj

@@ -15,7 +15,7 @@
 	<EnforceCodeStyleInBuild>True</EnforceCodeStyleInBuild>
 	<PackageLicenseFile>LICENSE</PackageLicenseFile>
 	<PackageReadmeFile>README.md</PackageReadmeFile>
-	<Version>1.15.4</Version>
+	<Version>1.15.5</Version>
   </PropertyGroup>
 
   <ItemGroup>

Telegrator.Hosting/TelegramBotHost.cs

@@ -1,4 +1,5 @@
 using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.DependencyInjection.Extensions;
 using Microsoft.Extensions.Hosting;
 using Microsoft.Extensions.Logging;
 using System.Text;
@@ -159,7 +160,14 @@ namespace Telegrator.Hosting
 
             services.AddSingleton<ITelegramBotHost>(this);
             services.AddSingleton<ITelegratorBot>(this);
-            services.AddSingleton<IHandlersCollection>(handlers);
+            services.AddSingleton(handlers);
+
+            if (handlers is IHandlersManager manager)
+            {
+                services.RemoveAll<IHandlersProvider>();
+                services.AddSingleton<IHandlersProvider>(manager);
+                services.AddSingleton(manager);
+            }
         }
     }
 }

Telegrator.Hosting/Telegrator.Hosting.csproj

@@ -16,7 +16,7 @@
 	  <EnforceCodeStyleInBuild>True</EnforceCodeStyleInBuild>
 	  <PackageLicenseFile>LICENSE</PackageLicenseFile>
 	  <PackageReadmeFile>README.md</PackageReadmeFile>
-	  <Version>1.15.4</Version>
+	  <Version>1.15.5</Version>
   </PropertyGroup>
 
   <ItemGroup>

Telegrator/MadiatorCore/Descriptors/HandlerInspector.cs

@@ -91,7 +91,7 @@ namespace Telegrator.MadiatorCore.Descriptors
         public static DescriptorAspectsSet GetAspects(Type handlerType)
         {
             Type? typedPre = handlerType.GetCustomAttribute(typeof(BeforeExecutionAttribute<>))?.GetType().GetGenericArguments()[0];
-            Type? typedPost = handlerType.GetCustomAttribute(typeof(AfterExecutionAttribute<>)).GetType().GetGenericArguments()[0];
+            Type? typedPost = handlerType.GetCustomAttribute(typeof(AfterExecutionAttribute<>))?.GetType().GetGenericArguments()[0];
             return new DescriptorAspectsSet(typedPre, typedPost);
         }
     }

Telegrator/MadiatorCore/IHandlersManager.cs

@@ -0,0 +1,11 @@
+namespace Telegrator.MadiatorCore
+{
+    /// <summary>
+    /// Combines <see cref="IHandlersCollection"/> and <see cref="IHandlersProvider"/>.
+    /// Provides functionality of collecting, organizing and resolving handlers instances.
+    /// </summary>
+    public interface IHandlersManager : IHandlersCollection, IHandlersProvider
+    {
+
+    }
+}

Telegrator/Providers/HandlersCollection.cs

@@ -74,8 +74,9 @@ namespace Telegrator.Providers
                 throw new Exception("This handler (" + descriptor.HandlerType.FullName + "), must contain constructor without parameters.");
 
             _allowedTypes.UnionAdd(descriptor.UpdateType);
-            foreach (MightAwaitAttribute mightAwaits in descriptor.HandlerType.GetCustomAttributes<MightAwaitAttribute>())
-                _allowedTypes.UnionAdd(mightAwaits.UpdateTypes);
+            MightAwaitAttribute? mightAwait = descriptor.HandlerType.GetCustomAttribute<MightAwaitAttribute>();
+            if (mightAwait != null)
+                _allowedTypes.UnionAdd(mightAwait.UpdateTypes);
 
             IntersectCommands(descriptor);
             HandlerDescriptorList list = GetDescriptorList(descriptor);

Telegrator/Providers/HandlersManagerBase.cs

@@ -0,0 +1,128 @@
+using System.Reflection;
+using Telegram.Bot.Types.Enums;
+using Telegrator.Annotations;
+using Telegrator.Attributes;
+using Telegrator.Configuration;
+using Telegrator.Handlers.Components;
+using Telegrator.MadiatorCore;
+using Telegrator.MadiatorCore.Descriptors;
+
+namespace Telegrator.Providers
+{
+    /// <summary>
+    /// Provides functionality of incrementally collecting, organizing and resolving handlers instances.
+    /// Minimum implementation of <see cref="IHandlersManager"/>. Abstract class, still requires handler instance resolving.
+    /// </summary>
+    /// <param name="options"></param>
+    public abstract class HandlersManagerBase(ITelegratorOptions options) : IHandlersManager
+    {
+        /// <summary>
+        /// Dictionary that organizes handler descriptors by update type.
+        /// </summary>
+        protected readonly Dictionary<UpdateType, HandlerDescriptorList> _handlersDictionary = [];
+
+        /// <summary>
+        /// Gets the collection of Telegram.Bot.Types.Enums.UpdateType's allowed by registered handlers
+        /// </summary>
+        protected readonly List<UpdateType> _allowedTypes = [];
+
+        /// <summary>
+        /// Configuration options for handler collecting.
+        /// </summary>
+        protected readonly ITelegratorOptions? Options = options;
+
+        /// <summary>
+        /// Gets whether handlers must have a parameterless constructor.
+        /// </summary>
+        protected virtual bool MustHaveParameterlessCtor => true;
+
+        /// <summary>
+        /// List of command aliases that have been registered.
+        /// </summary>
+        public readonly List<string> CommandAliasses = [];
+
+        /// <inheritdoc/>
+        public HandlerDescriptorList this[UpdateType updateType] => _handlersDictionary[updateType];
+
+        /// <inheritdoc/>
+        public IEnumerable<UpdateType> AllowedTypes => _allowedTypes;
+
+        /// <inheritdoc/>
+        public IEnumerable<UpdateType> Keys => _handlersDictionary.Keys;
+
+        /// <inheritdoc/>
+        public IEnumerable<HandlerDescriptorList> Values => _handlersDictionary.Values;
+
+        /// <inheritdoc/>
+        public virtual IHandlersCollection AddDescriptor(HandlerDescriptor descriptor)
+        {
+            if (MustHaveParameterlessCtor && !descriptor.HandlerType.HasParameterlessCtor())
+                throw new Exception("This handler (" + descriptor.HandlerType.FullName + "), must contain constructor without parameters.");
+
+            _allowedTypes.UnionAdd([descriptor.UpdateType]);
+            MightAwaitAttribute? mightAwait = descriptor.HandlerType.GetCustomAttribute<MightAwaitAttribute>();
+            if (mightAwait != null)
+                _allowedTypes.UnionAdd(mightAwait.UpdateTypes);
+
+            IntersectCommands(descriptor);
+            HandlerDescriptorList list = GetDescriptorList(descriptor);
+
+            list.Add(descriptor);
+            return this;
+        }
+
+        /// <summary>
+        /// Gets the <see cref="HandlerDescriptorList"/> for the specified <see cref="HandlerDescriptor"/>.
+        /// </summary>
+        /// <param name="descriptor">The handler descriptor.</param>
+        /// <returns>The handler descriptor list containing the descriptor.</returns>
+        protected virtual HandlerDescriptorList GetDescriptorList(HandlerDescriptor descriptor)
+        {
+            UpdateType updateType = UpdateTypeExtensions.SuppressTypes.TryGetValue(descriptor.UpdateType, out UpdateType suppressType)
+                ? suppressType : descriptor.UpdateType;
+
+            if (!_handlersDictionary.TryGetValue(updateType, out HandlerDescriptorList? list))
+            {
+                list = new HandlerDescriptorList(updateType, Options);
+                _handlersDictionary.Add(updateType, list);
+            }
+
+            return list;
+        }
+
+        /// <summary>
+        /// Checks for intersecting command aliases and handles them according to configuration.
+        /// </summary>
+        /// <param name="descriptor">The handler descriptor to check for command aliases.</param>
+        /// <exception cref="Exception">Thrown when intersecting command aliases are found and ExceptIntersectingCommandAliases is enabled.</exception>
+        protected virtual void IntersectCommands(HandlerDescriptor descriptor)
+        {
+            if (Options == null || !Options.ExceptIntersectingCommandAliases)
+                return;
+
+            CommandAlliasAttribute? alliasAttribute = descriptor.HandlerType.GetCustomAttribute<CommandAlliasAttribute>();
+            if (alliasAttribute == null)
+                return;
+
+            if (CommandAliasses.Intersect(alliasAttribute.Alliases, StringComparer.InvariantCultureIgnoreCase).Any())
+                throw new Exception(descriptor.HandlerType.FullName);
+
+            CommandAliasses.AddRange(alliasAttribute.Alliases);
+        }
+
+        /// <inheritdoc/>
+        public bool TryGetDescriptorList(UpdateType updateType, out HandlerDescriptorList? list)
+        {
+            return _handlersDictionary.TryGetValue(updateType, out list);
+        }
+
+        /// <inheritdoc/>
+        public bool IsEmpty()
+        {
+            return _handlersDictionary.Any(pair => pair.Value.Count != 0);
+        }
+
+        /// <inheritdoc/>
+        public abstract UpdateHandlerBase GetHandlerInstance(HandlerDescriptor descriptor, CancellationToken cancellationToken = default);
+    }
+}

Telegrator/Telegrator.csproj

@@ -17,7 +17,7 @@
     <PackageTags>telegram;bot;mediator;attributes;aspect;hosting;host;framework;easy;simple;handlers</PackageTags>
     <PackageReadmeFile>README.md</PackageReadmeFile>
     <PackageLicenseFile>LICENSE</PackageLicenseFile>
-    <Version>1.15.4</Version>
+    <Version>1.15.5</Version>
   </PropertyGroup>
 
   <ItemGroup>