Add authentication and authorization (#21)

Reviewed-on: #21

src/GameIdeas/Client/GameIdeas.BlazorApp/Pages/User/Gateways/AuthGateway.cs

@@ -0,0 +1,38 @@
+using GameIdeas.BlazorApp.Services;
+using GameIdeas.BlazorApp.Shared.Constants;
+using GameIdeas.BlazorApp.Shared.Exceptions;
+using GameIdeas.Resources;
+using GameIdeas.Shared.Dto;
+using Microsoft.AspNetCore.Components.Authorization;
+
+namespace GameIdeas.BlazorApp.Pages.User.Gateways;
+
+public class AuthGateway(IHttpClientService httpClient,
+    AuthenticationStateProvider stateProvider) : IAuthGateway
+{
+    public async Task<bool> Login(UserDto userDto)
+    {
+        try
+        {
+            var token = await httpClient.PostAsync<TokenDto>(Endpoints.Auth.Login, userDto);
+            await ((JwtAuthenticationStateProvider)stateProvider).NotifyUserAuthenticationAsync(token!.Token!);
+            return true;
+        }
+        catch (Exception)
+        {
+            throw new AuthenticationUserException(ResourcesKey.UserLoginFailed);
+        }
+    }
+
+    public async Task Logout()
+    {
+        try
+        {
+            await ((JwtAuthenticationStateProvider)stateProvider).NotifyUserLogoutAsync();
+        }
+        catch (Exception)
+        {
+            throw new AuthenticationUserException(ResourcesKey.UserLogoutFailed);
+        }
+    }
+}