Mediator work

Framework/Foundation/Extensions/AssemblyExtensions.cs

@@ -0,0 +1,12 @@
+using System.Reflection;
+
+namespace Toolkit.Framework.Foundation;
+
+public static class AssemblyExtensions
+{
+    public static Stream? ExtractResource(this Assembly assembly, string filename)
+    {
+        string? resourceName = $"{assembly.GetName()?.Name?.Replace("-", "_")}.{filename}";
+        return assembly.GetManifestResourceStream(resourceName);
+    }
+}

Framework/Foundation/Extensions/IServiceCollectionExtensions.cs

@@ -1,34 +1,20 @@
 using Mediator;
+using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.DependencyInjection.Extensions;
+using Microsoft.Extensions.Options;
 
 namespace Toolkit.Framework.Foundation;
 
 public static class IServiceCollectionExtensions
 {
-    public static IServiceCollection AddHandler<TRequestHandler>(this IServiceCollection services) where TRequestHandler : notnull
+    public static IServiceCollection AddConfiguration<TConfiguration>(this IServiceCollection serviceCollection, IConfiguration configuration) where TConfiguration : class, new()
     {
-        if (typeof(TRequestHandler).GetInterface(typeof(IRequestHandler<,>).Name) is { } contract)
-        {
-            if (contract.GetGenericArguments() is { Length: 2 } arguments)
-            {
-                Type requestType = arguments[0];
-                Type responseType = arguments[1];
-                Type wrapperType = typeof(RequestClassHandlerWrapper<,>).MakeGenericType(requestType, responseType);
+        serviceCollection.Configure<TConfiguration>(configuration);
+        serviceCollection.AddTransient(provider => provider.GetService<IOptionsMonitor<TConfiguration>>()!.CurrentValue);
+        serviceCollection.AddTransient<ConfigurationInitializer<TConfiguration>>();
 
-                services.TryAdd(new ServiceDescriptor(typeof(TRequestHandler), typeof(TRequestHandler), ServiceLifetime.Transient));
-                services.Add(new ServiceDescriptor(wrapperType,
-                    sp =>
-                    {
-                        return sp.GetService<IServiceFactory>()?.Create(wrapperType, sp.GetRequiredService<TRequestHandler>(), sp.GetServices(typeof(IPipelineBehavior<,>).MakeGenericType(requestType, responseType)))!;
-                    },
-                    ServiceLifetime.Transient
-                ));
-
-            }
-        }
-
-        return services;
+        return serviceCollection;
     }
 
     public static IServiceCollection AddFoundation(this IServiceCollection serviceCollection)
@@ -50,4 +36,80 @@ public static class IServiceCollectionExtensions
 
         return serviceCollection;
     }
+
+    public static IServiceCollection AddHandler<THandler>(this IServiceCollection services, ServiceLifetime lifetime = ServiceLifetime.Transient) where THandler : notnull
+    {
+        if (typeof(THandler).GetInterface(typeof(IRequestHandler<,>).Name) is { } requestContract)
+        {
+            if (requestContract.GetGenericArguments() is { Length: 2 } arguments)
+            {
+                Type requestType = arguments[0];
+                Type responseType = arguments[1];
+
+                Type wrapperType = typeof(RequestClassHandlerWrapper<,>).MakeGenericType(requestType, responseType);
+
+                services.TryAdd(new ServiceDescriptor(typeof(THandler), typeof(THandler), lifetime));
+                services.Add(new ServiceDescriptor(wrapperType,
+                    sp =>
+                    {
+                        return sp.GetService<IServiceFactory>()?.Create(wrapperType, sp.GetRequiredService<THandler>(), sp.GetServices(typeof(IPipelineBehavior<,>).MakeGenericType(requestType, responseType)))!;
+                    },
+                    lifetime
+                ));
+
+            }
+        }
+
+        if (typeof(THandler).GetInterface(typeof(ICommandHandler<,>).Name) is { } commandContract)
+        {
+            if (commandContract.GetGenericArguments() is { Length: 2 } arguments)
+            {
+                Type requestType = arguments[0];
+                Type responseType = arguments[1];
+
+                Type wrapperType = typeof(CommandClassHandlerWrapper<,>).MakeGenericType(requestType, responseType);
+
+                services.TryAdd(new ServiceDescriptor(typeof(THandler), typeof(THandler), lifetime));
+                services.Add(new ServiceDescriptor(wrapperType,
+                    sp =>
+                    {
+                        return sp.GetService<IServiceFactory>()?.Create(wrapperType, sp.GetRequiredService<THandler>(), sp.GetServices(typeof(IPipelineBehavior<,>).MakeGenericType(requestType, responseType)))!;
+                    },
+                    lifetime
+                ));
+            }
+        }
+
+        if (typeof(THandler).GetInterface(typeof(IQueryHandler<,>).Name) is { } queryContract)
+        {
+            if (queryContract.GetGenericArguments() is { Length: 2 } arguments)
+            {
+                Type requestType = arguments[0];
+                Type responseType = arguments[1];
+
+                Type wrapperType = typeof(QueryClassHandlerWrapper<,>).MakeGenericType(requestType, responseType);
+
+                services.TryAdd(new ServiceDescriptor(typeof(THandler), typeof(THandler), lifetime));
+                services.Add(new ServiceDescriptor(wrapperType,
+                    sp =>
+                    {
+                        return sp.GetService<IServiceFactory>()?.Create(wrapperType, sp.GetRequiredService<THandler>(), sp.GetServices(typeof(IPipelineBehavior<,>).MakeGenericType(requestType, responseType)))!;
+                    },
+                    lifetime
+                ));
+            }
+        }
+        return services;
+    }
+
+    public static IServiceCollection AddWritableConfiguration<TConfiguration>(this IServiceCollection serviceCollection, IConfiguration configuration) where TConfiguration : class, new()
+    {
+        serviceCollection.Configure<TConfiguration>(configuration);
+        serviceCollection.AddTransient<IConfigurationWriter<TConfiguration>, ConfigurationWriter<TConfiguration>>();
+        serviceCollection.AddTransient(provider => provider.GetService<IOptionsMonitor<TConfiguration>>()!.CurrentValue);
+        serviceCollection.AddHandler<WriteHandler<TConfiguration>>();
+        serviceCollection.AddTransient<ConfigurationInitializer<TConfiguration>>();
+
+        return serviceCollection;
+    }
 }

Framework/Foundation/Lifecycles/CommandClassHandlerWrapper.cs

@@ -0,0 +1,25 @@
+using Mediator;
+
+namespace Toolkit.Framework.Foundation;
+
+public class CommandClassHandlerWrapper<TRequest, TResponse> where TRequest : class, ICommand<TResponse>
+{
+    private readonly MessageHandlerDelegate<TRequest, TResponse> handler;
+
+    public CommandClassHandlerWrapper(ICommandHandler<TRequest, TResponse> concreteHandler, 
+        IEnumerable<IPipelineBehavior<TRequest, TResponse>> pipelineBehaviours)
+    {
+        MessageHandlerDelegate<TRequest, TResponse> handler = concreteHandler.Handle;
+
+        foreach (IPipelineBehavior<TRequest, TResponse>? pipeline in pipelineBehaviours.Reverse())
+        {
+            MessageHandlerDelegate<TRequest, TResponse> handlerCopy = handler;
+            IPipelineBehavior<TRequest, TResponse> pipelineCopy = pipeline;
+            handler = (TRequest message, CancellationToken cancellationToken) => pipelineCopy.Handle(message, cancellationToken, handlerCopy);
+        }
+
+        this.handler = handler;
+    }
+
+    public ValueTask<TResponse> Handle(TRequest request, CancellationToken cancellationToken) => handler(request, cancellationToken);
+}

Framework/Foundation/Lifecycles/Mediator.cs

@@ -1,5 +1,4 @@
 using Mediator;
-using System.Diagnostics;
 
 namespace Toolkit.Framework.Foundation;
 
@@ -45,7 +44,6 @@ public class Mediator : IMediator
     public ValueTask<TResponse> Send<TResponse>(IRequest<TResponse> request, CancellationToken cancellationToken = default)
     {
         dynamic? handler = factory.GetService(typeof(RequestClassHandlerWrapper<,>).MakeGenericType(request.GetType(), typeof(TResponse)));  
-        
         if (handler is not null)
         {
             return handler.Handle((dynamic)request, cancellationToken);
@@ -56,16 +54,70 @@ public class Mediator : IMediator
 
     public ValueTask<TResponse> Send<TResponse>(ICommand<TResponse> command, CancellationToken cancellationToken = default)
     {
-        throw new NotImplementedException();
+        dynamic? handler = factory.GetService(typeof(CommandClassHandlerWrapper<,>).MakeGenericType(command.GetType(), typeof(TResponse)));
+        if (handler is not null)
+        {
+            return handler.Handle((dynamic)command, cancellationToken);
+        }
+
+        return default;
     }
 
     public ValueTask<TResponse> Send<TResponse>(IQuery<TResponse> query, CancellationToken cancellationToken = default)
     {
-        throw new NotImplementedException();
+        dynamic? handler = factory.GetService(typeof(QueryClassHandlerWrapper<,>).MakeGenericType(query.GetType(), typeof(TResponse)));
+        if (handler is not null)
+        {
+            return handler.Handle((dynamic)query, cancellationToken);
+        }
+
+        return default;
     }
 
     public ValueTask<object?> Send(object message, CancellationToken cancellationToken = default)
     {
-        throw new NotImplementedException();
+        if (message.GetType().GetInterface(typeof(IRequest<>).Name) is { } requestInterface)
+        {
+            if (requestInterface.GetGenericArguments() is { Length: 1 } arguments)
+            {
+                Type responseType = arguments[0];
+
+                dynamic? handler = factory.GetService(typeof(RequestClassHandlerWrapper<,>).MakeGenericType(message.GetType(), responseType));
+                if (handler is not null)
+                {
+                    return handler.Handle((dynamic)message, cancellationToken);
+                }
+            }
+        }
+
+        if (message.GetType().GetInterface(typeof(ICommand<>).Name) is { } commandInterface)
+        {
+            if (commandInterface.GetGenericArguments() is { Length: 1 } arguments)
+            {
+                Type responseType = arguments[0];
+
+                dynamic? handler = factory.GetService(typeof(CommandClassHandlerWrapper<,>).MakeGenericType(message.GetType(), responseType));
+                if (handler is not null)
+                {
+                    return handler.Handle((dynamic)message, cancellationToken);
+                }
+            }
+        }
+
+        if (message.GetType().GetInterface(typeof(IQuery<>).Name) is { } queryInterface)
+        {
+            if (queryInterface.GetGenericArguments() is { Length: 1 } arguments)
+            {
+                Type responseType = arguments[0];
+
+                dynamic? handler = factory.GetService(typeof(QueryClassHandlerWrapper<,>).MakeGenericType(message.GetType(), responseType));
+                if (handler is not null)
+                {
+                    return handler.Handle((dynamic)message, cancellationToken);
+                }
+            }
+        }
+
+        return default;
     }
 }

Framework/Foundation/Lifecycles/QueryClassHandlerWrapper.cs

@@ -0,0 +1,26 @@
+using Mediator;
+
+namespace Toolkit.Framework.Foundation;
+
+public class QueryClassHandlerWrapper<TRequest, TResponse> where TRequest : class, IQuery<TResponse>
+{
+    private readonly MessageHandlerDelegate<TRequest, TResponse> handler;
+
+    public QueryClassHandlerWrapper(IQueryHandler<TRequest, TResponse> concreteHandler,
+        IEnumerable<IPipelineBehavior<TRequest, TResponse>> pipelineBehaviours)
+    {
+        MessageHandlerDelegate<TRequest, TResponse> handler = concreteHandler.Handle;
+
+        foreach (IPipelineBehavior<TRequest, TResponse>? pipeline in pipelineBehaviours.Reverse())
+        {
+            MessageHandlerDelegate<TRequest, TResponse> handlerCopy = handler;
+            IPipelineBehavior<TRequest, TResponse> pipelineCopy = pipeline;
+            handler = (TRequest message, CancellationToken cancellationToken) => pipelineCopy.Handle(message, cancellationToken, handlerCopy);
+        }
+
+        this.handler = handler;
+    }
+
+    public ValueTask<TResponse> Handle(TRequest request, CancellationToken cancellationToken) =>
+        handler(request, cancellationToken);
+}