Add resend confirmation email feature (#166)

src/Core/Service/Service.Auth/ConfirmationService.cs

@@ -1,34 +1,53 @@
 
 using Domain.Exceptions;
 using Infrastructure.Repository.Auth;
+using Service.Emails;
 
 namespace Service.Auth;
 
 public class ConfirmationService(
     IAuthRepository authRepository,
-    ITokenService tokenService
+    ITokenService tokenService,
+    IEmailService emailService
 ) : IConfirmationService
 {
-   public async Task<ConfirmationServiceReturn> ConfirmUserAsync(
-       string confirmationToken
-   )
-   {
-      var validatedToken = await tokenService.ValidateConfirmationTokenAsync(
-          confirmationToken
-      );
+    public async Task<ConfirmationServiceReturn> ConfirmUserAsync(
+        string confirmationToken
+    )
+    {
+        var validatedToken = await tokenService.ValidateConfirmationTokenAsync(
+            confirmationToken
+        );
 
-      var user = await authRepository.ConfirmUserAccountAsync(
-          validatedToken.UserId
-      );
+        var user = await authRepository.ConfirmUserAccountAsync(
+            validatedToken.UserId
+        );
 
-      if (user == null)
-      {
-         throw new UnauthorizedException("User account not found");
-      }
+        if (user == null)
+        {
+            throw new UnauthorizedException("User account not found");
+        }
 
-      return new ConfirmationServiceReturn(
-          DateTime.UtcNow,
-          user.UserAccountId
-      );
-   }
+        return new ConfirmationServiceReturn(
+            DateTime.UtcNow,
+            user.UserAccountId
+        );
+    }
+
+    public async Task ResendConfirmationEmailAsync(Guid userId)
+    {
+        var user = await authRepository.GetUserByIdAsync(userId);
+        if (user == null)
+        {
+            return; // Silent return to prevent user enumeration
+        }
+
+        if (await authRepository.IsUserVerifiedAsync(userId))
+        {
+            return; // Already confirmed, no-op
+        }
+
+        var confirmationToken = tokenService.GenerateConfirmationToken(user);
+        await emailService.SendResendConfirmationEmailAsync(user, confirmationToken);
+    }
 }