Init

Prefab.Web/Gateway/Categories.cs

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+using System.Net;
+using FluentValidation;
+using Prefab.Domain.Exceptions;
+using Prefab.Endpoints;
+using Prefab.Web.Client.Models;
+using Prefab.Web.Client.Models.Shared;
+using Prefab.Web.Client.Pages;
+using Prefab.Web.Client.Services;
+
+namespace Prefab.Web.Gateway;
+
+public static class Categories
+{
+    public class Endpoints : IEndpointRegistrar
+    {
+        public void MapEndpoints(IEndpointRouteBuilder endpoints)
+        {
+            endpoints.MapGet("/bff/categories/page",
+                    async (ICategoriesPageService service, CancellationToken cancellationToken) =>
+                    {
+                        var result = await service.GetPage(cancellationToken);
+                        var status = result.Problem?.StatusCode ?? (result.IsSuccess
+                            ? StatusCodes.Status200OK
+                            : StatusCodes.Status500InternalServerError);
+                        return Results.Json(result, statusCode: status);
+                    })
+                .WithTags(nameof(Categories));
+        }
+    }
+
+    public class PageService(Prefab.Shared.Catalog.IModuleClient moduleClient) : ICategoriesPageService
+    {
+        public async Task<Result<CategoriesPageModel>> GetPage(CancellationToken cancellationToken)
+        {
+            try
+            {
+                var response = await moduleClient.Category.GetCategories(cancellationToken);
+
+                var model = new CategoriesPageModel
+                {
+                    Categories = response.Categories.Select(x => new CategoryListItemModel
+                    {
+                        Id = x.Id,
+                        Name = x.Name,
+                        ParentName = x.ParentName
+                    })
+                };
+
+                return Result<CategoriesPageModel>.Success(model);
+            }
+            catch (Exception exception)
+            {
+                var problem = exception switch
+                {
+                    ValidationException validationException => ResultProblem.FromValidation(validationException),
+                    DomainException domainException => ResultProblem.Unexpected(domainException.Message, domainException, HttpStatusCode.UnprocessableEntity),
+                    _ => ResultProblem.Unexpected("Failed to retrieve categories.", exception)
+                };
+
+                return Result<CategoriesPageModel>.Failure(problem);
+            }
+        }
+    }
+}