graphql fluent validation implementation with middleware.

2021-02-03 20:28:56 -05:00
parent afb8b534bb
commit ffcfc60df1
19 changed files with 332 additions and 19 deletions
@@ -0,0 +1,11 @@
+using PoweredSoft.CQRS.GraphQL.Abstractions;
+using System.Collections.Generic;
+
+namespace PoweredSoft.CQRS.GraphQL.FluentValidation
+{
+    public class GraphQLFieldError : IGraphQLFieldError
+    {
+        public string Field { get; set; }
+        public List<string> Errors { get; set; } = new List<string>();
+    }
+}
@@ -0,0 +1,28 @@
+using FluentValidation.Results;
+using PoweredSoft.CQRS.GraphQL.Abstractions;
+using System.Collections.Generic;
+
+namespace PoweredSoft.CQRS.GraphQL.FluentValidation
+{
+    public class GraphQLFluentValidationResult : IGraphQLValidationResult
+    {
+        public bool IsValid => Errors.Count == 0;
+        public List<IGraphQLFieldError> Errors { get; } = new List<IGraphQLFieldError>();
+
+        public static GraphQLFluentValidationResult From(ValidationResult result)
+        {
+            var model = new GraphQLFluentValidationResult();
+            foreach (var error in result.Errors)
+            {
+                var fieldError = new GraphQLFieldError
+                {
+                    Field = error.PropertyName
+                };
+                fieldError.Errors.Add(error.ErrorMessage);
+                model.Errors.Add(fieldError);
+            }
+
+            return model;
+        }
+    }
+}
@@ -0,0 +1,47 @@
+using FluentValidation;
+using PoweredSoft.CQRS.GraphQL.Abstractions;
+using System;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace PoweredSoft.CQRS.GraphQL.FluentValidation
+{
+    public class GraphQLFluentValidationService : IGraphQLValidationService
+    {
+        private readonly IServiceProvider serviceProvider;
+
+        public GraphQLFluentValidationService(IServiceProvider serviceProvider)
+        {
+            this.serviceProvider = serviceProvider;
+        }
+
+        public async Task<IGraphQLValidationResult> ValidateAsync<T>(T subject, CancellationToken cancellationToken = default)
+        {
+            var validationService = serviceProvider.GetService(typeof(IValidator<T>)) as IValidator<T>;
+            if (validationService == null)
+                return new GraphQLValidResult();
+
+            var result = await validationService.ValidateAsync(subject, cancellationToken);
+            if (!result.IsValid)
+                return GraphQLFluentValidationResult.From(result);
+
+            return new GraphQLValidResult();
+        }
+
+        public async Task<IGraphQLValidationResult> ValidateObjectAsync(object subject, CancellationToken cancellationToken = default)
+        {
+            var validatorType = typeof(IValidator<>).MakeGenericType(subject.GetType());
+            var validationService = serviceProvider.GetService(validatorType) as IValidator;
+            if (validationService == null)
+                return new GraphQLValidResult();
+
+            var result = await validationService.ValidateAsync(new ValidationContext<object>(subject), cancellationToken);
+            if (!result.IsValid)
+                return GraphQLFluentValidationResult.From(result);
+
+            return new GraphQLValidResult();
+        }
+    }
+}
@@ -0,0 +1,11 @@
+using PoweredSoft.CQRS.GraphQL.Abstractions;
+using System.Collections.Generic;
+
+namespace PoweredSoft.CQRS.GraphQL.FluentValidation
+{
+    public class GraphQLValidResult : IGraphQLValidationResult
+    {
+        public bool IsValid => true;
+        public List<IGraphQLFieldError> Errors { get; } = new List<IGraphQLFieldError>();
+    }
+}
@@ -0,0 +1,16 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netstandard2.0</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="FluentValidation" Version="9.5.0" />
+    <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="3.1.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\PoweredSoft.CQRS.GraphQL.Abstractions\PoweredSoft.CQRS.GraphQL.Abstractions.csproj" />
+  </ItemGroup>
+
+</Project>
@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.DependencyInjection.Extensions;
+using PoweredSoft.CQRS.GraphQL.Abstractions;
+
+namespace PoweredSoft.CQRS.GraphQL.FluentValidation
+{
+    public static class ServiceCollectionExtensions
+    {
+        public static IServiceCollection AddPoweredSoftGraphQLFluentValidation(this IServiceCollection services)
+        {
+            services.AddTransient<IGraphQLValidationService, GraphQLFluentValidationService>();
+            return services;
+        }
+    }
+}