Adding service layer testing (#151)

src/Core/Service/Service.Auth/RegisterService.cs

@@ -0,0 +1,61 @@
+using Domain.Entities;
+using Domain.Exceptions;
+using Infrastructure.Email;
+using Infrastructure.Email.Templates.Rendering;
+using Infrastructure.PasswordHashing;
+using Infrastructure.Repository.Auth;
+
+namespace Service.Auth;
+
+public class RegisterService(
+    IAuthRepository authRepo,
+    IPasswordInfrastructure passwordInfrastructure,
+    IEmailProvider emailProvider,
+    IEmailTemplateProvider emailTemplateProvider
+) : IRegisterService
+{
+    public async Task<UserAccount> RegisterAsync(UserAccount userAccount, string password)
+    {
+        // Check if user already exists
+        var existingUsername = await authRepo.GetUserByUsernameAsync(userAccount.Username);
+        var existingEmail = await authRepo.GetUserByEmailAsync(userAccount.Email);
+
+        if (existingUsername != null || existingEmail != null)
+        {
+            throw new ConflictException("Username or email already exists");
+        }
+
+
+        // password hashing
+        var hashed = passwordInfrastructure.Hash(password);
+
+        // Register user with hashed password and get the created user with generated ID
+        var createdUser = await authRepo.RegisterUserAsync(
+            userAccount.Username,
+            userAccount.FirstName,
+            userAccount.LastName,
+            userAccount.Email,
+            userAccount.DateOfBirth,
+            hashed);
+
+
+        // Generate confirmation link (TODO: implement proper token-based confirmation)
+        var confirmationLink = $"https://thebiergarten.app/confirm?email={Uri.EscapeDataString(createdUser.Email)}";
+
+        // Render email template
+        var emailHtml = await emailTemplateProvider.RenderUserRegisteredEmailAsync(
+            createdUser.FirstName,
+            confirmationLink
+        );
+
+        // Send welcome email with rendered template
+        await emailProvider.SendAsync(
+            createdUser.Email,
+            "Welcome to The Biergarten App!",
+            emailHtml,
+            isHtml: true
+        );
+
+        return createdUser;
+    }
+}