WebApi + ClientApp, GraphQL, Reflection

Events-WebApi/Events.WebAPI.Contract/Validation/ValidationBehaviour.cs

@@ -0,0 +1,27 @@
+using FluentValidation;
+using MediatR;
+
+namespace Events.WebAPI.Contract.Validation;
+
+public class ValidationBehaviour<TRequest, TResponse> : IPipelineBehavior<TRequest, TResponse> where TRequest : IBaseRequest
+{
+  private readonly IEnumerable<IValidator<TRequest>> validators;
+
+  public ValidationBehaviour(IEnumerable<IValidator<TRequest>> validators)
+  {
+    this.validators = validators;
+  }
+
+  public async Task<TResponse> Handle(TRequest request, RequestHandlerDelegate<TResponse> next, CancellationToken cancellationToken)
+  {
+    if (validators.Any())
+    {
+      var context = new ValidationContext<TRequest>(request);
+      var validationResults = await Task.WhenAll(validators.Select(v => v.ValidateAsync(context, cancellationToken)));
+      var failures = validationResults.SelectMany(r => r.Errors).Where(f => f != null).ToList();
+      if (failures.Count != 0)
+        throw new ValidationException(failures);
+    }
+    return await next();
+  }
+}