registration and authorization

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/IPasswordHasher.cs

@@ -1,7 +0,0 @@
-namespace SurveyBackend.Infrastructure.Services;
-
-public interface IPasswordHasher
-{
-    public string HashPassword(string password);
-    public bool Verify(string password, string hashedPassword);
-}

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);
+    }
+}