Merge Features.Auth and Features.UserManagement into Features.Users

web/backend/Features/Features.Users/Commands/ConfirmUser/ConfirmUserCommand.cs

@@ -0,0 +1,7 @@
+using Features.Auth.Dtos;
+using MediatR;
+
+namespace Features.Auth.Commands.ConfirmUser;
+
+/// <summary>Validates a confirmation token and confirms the corresponding user account.</summary>
+public record ConfirmUserCommand(string Token) : IRequest<ConfirmationPayload>;

web/backend/Features/Features.Users/Commands/ConfirmUser/ConfirmUserHandler.cs

@@ -0,0 +1,41 @@
+using Domain.Exceptions;
+using Features.Auth.Dtos;
+using Features.Auth.Identity;
+using Features.Auth.Services;
+using MediatR;
+using Microsoft.AspNetCore.Identity;
+
+namespace Features.Auth.Commands.ConfirmUser;
+
+/// <summary>
+///     Handles <see cref="ConfirmUserCommand" /> by validating the confirmation token and marking the
+///     corresponding user account as confirmed.
+/// </summary>
+public class ConfirmUserHandler(
+    UserManager<ApplicationUser> userManager,
+    IUserEmailStore<ApplicationUser> emailStore,
+    ITokenService tokenService
+) : IRequestHandler<ConfirmUserCommand, ConfirmationPayload>
+{
+    /// <exception cref="UnauthorizedException">
+    ///     Thrown when the confirmation token is invalid or expired, or when the associated user account cannot be found.
+    /// </exception>
+    public async Task<ConfirmationPayload> Handle(
+        ConfirmUserCommand request,
+        CancellationToken cancellationToken
+    )
+    {
+        ValidatedToken validatedToken = await tokenService.ValidateConfirmationTokenAsync(
+            request.Token
+        );
+
+        ApplicationUser? user = await userManager.FindByIdAsync(validatedToken.UserId.ToString());
+        if (user == null)
+            throw new UnauthorizedException("User account not found");
+
+        await emailStore.SetEmailConfirmedAsync(user, true, cancellationToken);
+        await userManager.UpdateAsync(user);
+
+        return new ConfirmationPayload(user.Id, DateTime.UtcNow);
+    }
+}