Remove repository tests, usages of registration dto used in repo

web/backend/Features/Features.Auth/Commands/Login/LoginCommand.cs

@@ -0,0 +1,10 @@
+using Features.Auth.Dtos;
+using MediatR;
+
+namespace Features.Auth.Commands.Login;
+
+/// <summary>
+///     Authenticates a user using their username and password and issues new tokens. Bound directly
+///     from the request body of <c>POST /api/auth/login</c>.
+/// </summary>
+public record LoginCommand(string Username, string Password) : IRequest<LoginPayload>;

web/backend/Features/Features.Auth/Commands/Login/LoginHandler.cs

@@ -0,0 +1,43 @@
+using Domain.Entities;
+using Domain.Exceptions;
+using Features.Auth.Dtos;
+using Features.Auth.Repository;
+using Features.Auth.Services;
+using Infrastructure.PasswordHashing;
+using MediatR;
+
+namespace Features.Auth.Commands.Login;
+
+/// <summary>
+///     Handles <see cref="LoginCommand" /> by verifying credentials and issuing access/refresh tokens.
+/// </summary>
+public class LoginHandler(
+    IAuthRepository authRepo,
+    IPasswordInfrastructure passwordInfrastructure,
+    ITokenService tokenService
+) : IRequestHandler<LoginCommand, LoginPayload>
+{
+    /// <exception cref="UnauthorizedException">
+    ///     Thrown when the username does not match any account, the account has no active credential,
+    ///     or the supplied password does not match the stored hash.
+    /// </exception>
+    public async Task<LoginPayload> Handle(LoginCommand request, CancellationToken cancellationToken)
+    {
+        UserAccount user =
+            await authRepo.GetUserByUsernameAsync(request.Username)
+            ?? throw new UnauthorizedException("Invalid username or password.");
+
+        // @todo handle expired passwords
+        UserCredential activeCred =
+            await authRepo.GetActiveCredentialByUserAccountIdAsync(user.UserAccountId)
+            ?? throw new UnauthorizedException("Invalid username or password.");
+
+        if (!passwordInfrastructure.Verify(request.Password, activeCred.Hash))
+            throw new UnauthorizedException("Invalid username or password.");
+
+        string accessToken = tokenService.GenerateAccessToken(user);
+        string refreshToken = tokenService.GenerateRefreshToken(user);
+
+        return new LoginPayload(user.UserAccountId, user.Username, refreshToken, accessToken);
+    }
+}

web/backend/Features/Features.Auth/Commands/Login/LoginValidator.cs

@@ -0,0 +1,14 @@
+using FluentValidation;
+
+namespace Features.Auth.Commands.Login;
+
+/// <summary>Validates that <see cref="LoginCommand.Username" /> and <see cref="LoginCommand.Password" /> are present.</summary>
+public class LoginValidator : AbstractValidator<LoginCommand>
+{
+    public LoginValidator()
+    {
+        RuleFor(x => x.Username).NotEmpty().WithMessage("Username is required");
+
+        RuleFor(x => x.Password).NotEmpty().WithMessage("Password is required");
+    }
+}

web/backend/Features/Features.Auth/Commands/RegisterUser/RegisterUserHandler.cs

@@ -34,14 +34,18 @@ public class RegisterUserHandler(
         string hashed = passwordInfrastructure.Hash(request.Password);
 
         UserAccount createdUser = await authRepo.RegisterUserAsync(
-            new UserRegistrationDto(
-                request.Username,
-                request.FirstName,
-                request.LastName,
-                request.Email,
-                request.DateOfBirth,
-                hashed
-            )
+            new UserAccount
+            {
+                Username = request.Username,
+                FirstName =  request.FirstName,
+                LastName =  request.LastName,
+                DateOfBirth =  request.DateOfBirth,
+                Email = request.Email,
+                UserCredential = new UserCredential
+                {
+                    Hash = hashed,
+                }
+            }
         );
 
         string accessToken = tokenService.GenerateAccessToken(createdUser);