1

Yes.Blog/Endpoints/EndpointValidationExtensions.cs

@@ -0,0 +1,41 @@
+
+
+namespace Yes.Blog.Endpoints
+{
+	public static class EndpointValidationExtensions
+	{
+		public static RouteHandlerBuilder WithRequestValidation<TRequest>(this RouteHandlerBuilder builder)
+		{
+			return builder
+				.AddEndpointFilter<EndpointValidatorFilter<TRequest>>()
+				.ProducesValidationProblem();
+		}
+	}
+
+
+	public class EndpointValidatorFilter<T> : IEndpointFilter
+	{
+		private readonly IValidator<T> _validator;
+		public EndpointValidatorFilter(IValidator<T> validator)
+		{
+			_validator = validator;
+		}
+
+		public async ValueTask<object?> InvokeAsync(EndpointFilterInvocationContext context, EndpointFilterDelegate next)
+		{
+			T? inputData = context.GetArgument<T>(0);
+
+			if (inputData is not null)
+			{
+				var validationResult = await _validator.ValidateAsync(inputData);
+				if (!validationResult.IsValid)
+				{
+                    return Results.ValidationProblem(validationResult.ToDictionary(),
+													 statusCode: (int)HttpStatusCode.UnprocessableEntity);
+				}
+			}
+
+			return await next.Invoke(context);
+		}
+	}
+}