registration and authorization

SurveyBackend/SurveyBackend.API/Controllers/AuthController.cs

@@ -1,5 +1,7 @@
 using Microsoft.AspNetCore.Mvc;
 using SurveyBackend.DTOs;
+using SurveyBackend.Infrastructure.Services;
+using SurveyBackend.Mappers.UserDTOs;
 
 namespace SurveyBackend.Controllers;
 
@@ -7,9 +9,32 @@ namespace SurveyBackend.Controllers;
 [Route("auth")]
 public class AuthController : ControllerBase
 {
-    [HttpPost("login")]
-    public async Task<IActionResult> GetToken([FromBody] UserLoginDto loginData)
+    private readonly AuthorizationService _authorizationService;
+
+    public AuthController(AuthorizationService authorizationService)
     {
+        _authorizationService = authorizationService;
+    }
+
+    [HttpPost("login")]
+    public async Task<IActionResult> LogIn([FromBody] UserLoginDto loginData)
+    {
+        var token = await _authorizationService.LogInUser(loginData.Email, loginData.Password);
+        return token is null ? Unauthorized() : Ok(new { token = token });
+    }
+
+    [HttpPost("register")]
+    public async Task<IActionResult> Register([FromBody] UserRegistrationDto registerData)
+    {
+        try
+        {
+            await _authorizationService.RegisterUser(UserRegistrationMapper.UserRegistrationToModel(registerData));
+        }
+        catch (Exception ex)
+        {
+            return BadRequest(ex.Message);
+        }
+
         return Ok();
     }
 }

SurveyBackend/SurveyBackend.API/Mappers/UserDTOs/UserRegistrationMapper.cs

@@ -0,0 +1,17 @@
+using SurveyBackend.Core.Models;
+using SurveyBackend.Core.Services;
+using SurveyBackend.DTOs;
+using SurveyBackend.Infrastructure.Services;
+
+namespace SurveyBackend.Mappers.UserDTOs;
+
+public static class UserRegistrationMapper
+{
+    public static User UserRegistrationToModel(UserRegistrationDto dto) => new User
+    {
+        Email = dto.Email,
+        FirstName = dto.FirstName,
+        LastName = dto.LastName,
+        Password = dto.Password,
+    };
+}

SurveyBackend/SurveyBackend.API/Program.cs

@@ -2,8 +2,12 @@ using System.Text;
 using Microsoft.AspNetCore.Authentication.JwtBearer;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.IdentityModel.Tokens;
+using SurveyBackend.Core.Repositories;
+using SurveyBackend.Core.Services;
 using SurveyBackend.Infrastructure;
 using SurveyBackend.Infrastructure.Data;
+using SurveyBackend.Infrastructure.Repositories;
+using SurveyBackend.Infrastructure.Services;
 using SurveyLib.Core.Repositories;
 using SurveyLib.Core.Services;
 using SurveyLib.Infrastructure.EFCore.Data;
@@ -27,6 +31,13 @@ public class Program
 
         builder.Services.AddScoped<SurveyDbContext>(provider => provider.GetRequiredService<ApplicationDbContext>());
 
+        builder.Services.AddScoped<IUserRepository, UserRepository>();
+        builder.Services.AddScoped<IUserService, UserService>();
+
+        builder.Services.AddScoped<IPasswordHasher, Sha256PasswordHasher>();
+
+        builder.Services.AddScoped<AuthorizationService>();
+
         builder.Services.AddScoped<ISurveyRepository, SurveyRepository>();
         builder.Services.AddScoped<ISurveyService, SurveyService>();
 

SurveyBackend/SurveyBackend.Core/Models/User.cs

@@ -4,7 +4,7 @@ namespace SurveyBackend.Core.Models;
 
 public class User
 {
-    public string Id { get; set; }
+    public int Id { get; set; }
     public string Email { get; set; }
     public string FirstName { get; set; }
     public string LastName { get; set; }

SurveyBackend/SurveyBackend.Core/Repositories/IUserRepository.cs

@@ -4,4 +4,5 @@ namespace SurveyBackend.Core.Repositories;
 
 public interface IUserRepository : IGenericRepository<User>
 {
+    public Task<User?> GetUserByEmail(string email);
 }

SurveyBackend/SurveyBackend.Core/Services/IPasswordHasher.cs

@@ -1,4 +1,4 @@
-namespace SurveyBackend.Infrastructure.Services;
+namespace SurveyBackend.Core.Services;
 
 public interface IPasswordHasher
 {

SurveyBackend/SurveyBackend.Core/Services/IUserService.cs

@@ -1,6 +1,9 @@
+using SurveyBackend.Core.Models;
+
 namespace SurveyBackend.Core.Services;
 
 public interface IUserService
 {
-    
+    public Task<User?> GetUserByEmail(string email);
+    public Task CreateUserAsync(User user);
 }

SurveyBackend/SurveyBackend.Infrastructure/Data/ApplicationDbContext.cs

@@ -13,7 +13,7 @@ public class ApplicationDbContext : SurveyDbContext
     public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)
         : base(options)
     {
-        
+        Database.EnsureCreated();
     }
 
     protected override void OnModelCreating(ModelBuilder modelBuilder)

SurveyBackend/SurveyBackend.Infrastructure/Repositories/UserRepository.cs

@@ -41,4 +41,9 @@ public class UserRepository : IUserRepository
         _context.Users.Remove(entity);
         await _context.SaveChangesAsync();
     }
+
+    public async Task<User?> GetUserByEmail(string email)
+    {
+        return await _context.Users.FirstOrDefaultAsync(u => u.Email == email);
+    }
 }

SurveyBackend/SurveyBackend.Infrastructure/Services/AuthorizationService.cs

@@ -0,0 +1,42 @@
+using SurveyBackend.Core.Models;
+using SurveyBackend.Core.Services;
+using SurveyBackend.Infrastructure.Helpers;
+
+namespace SurveyBackend.Infrastructure.Services;
+
+public class AuthorizationService
+{
+    private readonly IUserService _userService;
+    private readonly IPasswordHasher _passwordHasher;
+
+    public AuthorizationService(IUserService userService, IPasswordHasher passwordHasher)
+    {
+        _userService = userService;
+        _passwordHasher = passwordHasher;
+    }
+
+    public async Task<string?> LogInUser(string email, string password)
+    {
+        var user = await _userService.GetUserByEmail(email);
+        if (user is null || !_passwordHasher.Verify(password, user.Password))
+        {
+            return null;
+        }
+
+        var token = TokenHelper.GetAuthToken(user);
+        return token;
+    }
+
+    public async Task RegisterUser(User user)
+    {
+        var existingUser = await _userService.GetUserByEmail(user.Email);
+        if (existingUser is not null)
+        {
+            throw new Exception("Email already exists");
+        }
+
+        user.Password = _passwordHasher.HashPassword(user.Password);
+
+        await _userService.CreateUserAsync(user);
+    }
+}

SurveyBackend/SurveyBackend.Infrastructure/Services/Sha256PasswordHasher.cs

@@ -1,4 +1,5 @@
 using System.Security.Cryptography;
+using SurveyBackend.Core.Services;
 
 namespace SurveyBackend.Infrastructure.Services;
 

SurveyBackend/SurveyBackend.Infrastructure/Services/UserService.cs

@@ -0,0 +1,25 @@
+using SurveyBackend.Core.Models;
+using SurveyBackend.Core.Repositories;
+using SurveyBackend.Core.Services;
+
+namespace SurveyBackend.Infrastructure.Services;
+
+public class UserService : IUserService
+{
+    private readonly IUserRepository _userRepository;
+
+    public UserService(IUserRepository userRepository)
+    {
+        _userRepository = userRepository;
+    }
+
+    public async Task<User?> GetUserByEmail(string email)
+    {
+        return await _userRepository.GetUserByEmail(email);
+    }
+
+    public async Task CreateUserAsync(User user)
+    {
+        await _userRepository.AddAsync(user);
+    }
+}