Init

Prefab.Web.Client/Services/INavMenuService.cs

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+using System.Net;
+using System.Net.Http.Json;
+using Prefab.Web.Client.Models.Shared;
+
+namespace Prefab.Web.Client.Services;
+
+public interface INavMenuService
+{
+    Task<Result<NavMenuModel>> Get(int depth, CancellationToken cancellationToken);   
+}
+
+public sealed class NavMenuService : INavMenuService
+{
+    private readonly HttpClient _httpClient;
+
+    public NavMenuService(HttpClient httpClient)
+    {
+        _httpClient = httpClient ?? throw new ArgumentNullException(nameof(httpClient));
+    }
+
+    public async Task<Result<NavMenuModel>> Get(int depth, CancellationToken cancellationToken)
+    {
+        var normalizedDepth = Math.Clamp(depth, 1, 2);
+
+        try
+        {
+            using var response = await _httpClient.GetAsync($"/bff/nav-menu/{normalizedDepth}", cancellationToken);
+
+            var payload = await response.Content.ReadFromJsonAsync<Result<NavMenuModel>>(cancellationToken: cancellationToken);
+
+            if (payload is not null)
+            {
+                return payload;
+            }
+
+            if (!response.IsSuccessStatusCode)
+            {
+                var statusCode = (HttpStatusCode)response.StatusCode;
+                var problem = ResultProblem.Unexpected(
+                    "Failed to load navigation menu.",
+                    new HttpRequestException($"Navigation menu request failed with status code {(int)statusCode} ({statusCode})."),
+                    statusCode);
+
+                return Result<NavMenuModel>.Failure(problem);
+            }
+
+            var emptyProblem = ResultProblem.Unexpected(
+                "Failed to load navigation menu.",
+                new InvalidOperationException("Navigation menu response body was empty."),
+                (HttpStatusCode)response.StatusCode);
+
+            return Result<NavMenuModel>.Failure(emptyProblem);
+        }
+        catch (Exception exception)
+        {
+            var problem = ResultProblem.Unexpected("Failed to load navigation menu.", exception);
+            return Result<NavMenuModel>.Failure(problem);
+        }
+    }
+}