Add JWT authentication with AuthController and services

backend/Controllers/AuthController.cs

@@ -0,0 +1,92 @@
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.EntityFrameworkCore;
+using RacePlannerApi.Data;
+using RacePlannerApi.DTOs;
+using RacePlannerApi.Models;
+using RacePlannerApi.Services;
+
+namespace RacePlannerApi.Controllers;
+
+[ApiController]
+[Route("api/[controller]")]
+public class AuthController : ControllerBase
+{
+    private readonly RacePlannerDbContext _context;
+    private readonly JwtTokenService _jwtService;
+
+    public AuthController(RacePlannerDbContext context, JwtTokenService jwtService)
+    {
+        _context = context;
+        _jwtService = jwtService;
+    }
+
+    [HttpPost("register")]
+    public async Task<ActionResult<AuthResponse>> Register(RegisterRequest request)
+    {
+        // Check if email already exists
+        if (await _context.Users.AnyAsync(u => u.Email == request.Email))
+        {
+            return Conflict(new { error = "Email already registered" });
+        }
+
+        // Create new user
+        var user = new User
+        {
+            Email = request.Email,
+            PasswordHash = BCrypt.Net.BCrypt.HashPassword(request.Password),
+            Name = request.Name,
+            Role = request.Role
+        };
+
+        _context.Users.Add(user);
+        await _context.SaveChangesAsync();
+
+        // Generate token
+        var token = _jwtService.GenerateToken(user);
+
+        return Ok(new AuthResponse
+        {
+            Token = token,
+            User = new UserDto
+            {
+                Id = user.Id,
+                Email = user.Email,
+                Name = user.Name,
+                Role = user.Role.ToString()
+            }
+        });
+    }
+
+    [HttpPost("login")]
+    public async Task<ActionResult<AuthResponse>> Login(LoginRequest request)
+    {
+        // Find user by email
+        var user = await _context.Users.FirstOrDefaultAsync(u => u.Email == request.Email);
+
+        if (user == null)
+        {
+            return Unauthorized(new { error = "Invalid credentials" });
+        }
+
+        // Verify password
+        if (!BCrypt.Net.BCrypt.Verify(request.Password, user.PasswordHash))
+        {
+            return Unauthorized(new { error = "Invalid credentials" });
+        }
+
+        // Generate token
+        var token = _jwtService.GenerateToken(user);
+
+        return Ok(new AuthResponse
+        {
+            Token = token,
+            User = new UserDto
+            {
+                Id = user.Id,
+                Email = user.Email,
+                Name = user.Name,
+                Role = user.Role.ToString()
+            }
+        });
+    }
+}

backend/DTOs/AuthDtos.cs

@@ -0,0 +1,45 @@
+using System.ComponentModel.DataAnnotations;
+using RacePlannerApi.Models;
+
+namespace RacePlannerApi.DTOs;
+
+public class RegisterRequest
+{
+    [Required]
+    [EmailAddress]
+    public string Email { get; set; } = string.Empty;
+
+    [Required]
+    [MinLength(8)]
+    public string Password { get; set; } = string.Empty;
+
+    [Required]
+    [MinLength(2)]
+    public string Name { get; set; } = string.Empty;
+
+    public UserRole Role { get; set; } = UserRole.Participant;
+}
+
+public class LoginRequest
+{
+    [Required]
+    [EmailAddress]
+    public string Email { get; set; } = string.Empty;
+
+    [Required]
+    public string Password { get; set; } = string.Empty;
+}
+
+public class AuthResponse
+{
+    public string Token { get; set; } = string.Empty;
+    public UserDto User { get; set; } = null!;
+}
+
+public class UserDto
+{
+    public Guid Id { get; set; }
+    public string Email { get; set; } = string.Empty;
+    public string Name { get; set; } = string.Empty;
+    public string Role { get; set; } = string.Empty;
+}

backend/Program.cs

@@ -1,5 +1,9 @@
+using System.Text;
+using Microsoft.AspNetCore.Authentication.JwtBearer;
 using Microsoft.EntityFrameworkCore;
+using Microsoft.IdentityModel.Tokens;
 using RacePlannerApi.Data;
+using RacePlannerApi.Services;
 
 var builder = WebApplication.CreateBuilder(args);
 
@@ -8,6 +12,29 @@ builder.Services.AddControllers();
 builder.Services.AddEndpointsApiExplorer();
 builder.Services.AddOpenApi();
 
+// Configure JWT Authentication
+var jwtKey = builder.Configuration["Jwt:Key"] ?? "your-secret-key-here-minimum-32-characters-long";
+var jwtIssuer = builder.Configuration["Jwt:Issuer"] ?? "RacePlannerApi";
+var jwtAudience = builder.Configuration["Jwt:Audience"] ?? "RacePlannerClient";
+
+builder.Services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
+    .AddJwtBearer(options =>
+    {
+        options.TokenValidationParameters = new TokenValidationParameters
+        {
+            ValidateIssuer = true,
+            ValidateAudience = true,
+            ValidateLifetime = true,
+            ValidateIssuerSigningKey = true,
+            ValidIssuer = jwtIssuer,
+            ValidAudience = jwtAudience,
+            IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(jwtKey))
+        };
+    });
+
+// Register services
+builder.Services.AddScoped<JwtTokenService>();
+
 // Configure Entity Framework Core with PostgreSQL
 var connectionString = builder.Configuration.GetConnectionString("DefaultConnection")
     ?? "Host=localhost;Database=RacePlanner;Username=postgres;Password=postgres";
@@ -40,6 +67,8 @@ app.UseHttpsRedirection();
 // Apply CORS
 app.UseCors("AllowFrontend");
 
+// Authentication & Authorization
+app.UseAuthentication();
 app.UseAuthorization();
 
 app.MapControllers();

backend/RacePlannerApi.csproj

@@ -7,12 +7,15 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="BCrypt.Net-Next" Version="4.1.0" />
+    <PackageReference Include="Microsoft.AspNetCore.Authentication.JwtBearer" Version="10.0.5" />
     <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="10.0.0" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="10.0.5">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
     <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="10.0.1" />
+    <PackageReference Include="System.IdentityModel.Tokens.Jwt" Version="8.17.0" />
   </ItemGroup>
 
 </Project>

backend/Services/JwtTokenService.cs

@@ -0,0 +1,43 @@
+using System.IdentityModel.Tokens.Jwt;
+using System.Security.Claims;
+using System.Text;
+using Microsoft.IdentityModel.Tokens;
+using RacePlannerApi.Models;
+
+namespace RacePlannerApi.Services;
+
+public class JwtTokenService
+{
+    private readonly IConfiguration _configuration;
+
+    public JwtTokenService(IConfiguration configuration)
+    {
+        _configuration = configuration;
+    }
+
+    public string GenerateToken(User user)
+    {
+        var securityKey = new SymmetricSecurityKey(
+            Encoding.UTF8.GetBytes(_configuration["Jwt:Key"] ?? "your-secret-key-here-minimum-32-characters-long"));
+        var credentials = new SigningCredentials(securityKey, SecurityAlgorithms.HmacSha256);
+
+        var claims = new[]
+        {
+            new Claim(JwtRegisteredClaimNames.Sub, user.Id.ToString()),
+            new Claim(JwtRegisteredClaimNames.Email, user.Email),
+            new Claim(JwtRegisteredClaimNames.Name, user.Name),
+            new Claim("role", user.Role.ToString()),
+            new Claim(JwtRegisteredClaimNames.Jti, Guid.NewGuid().ToString())
+        };
+
+        var token = new JwtSecurityToken(
+            issuer: _configuration["Jwt:Issuer"] ?? "RacePlannerApi",
+            audience: _configuration["Jwt:Audience"] ?? "RacePlannerClient",
+            claims: claims,
+            expires: DateTime.Now.AddHours(24),
+            signingCredentials: credentials
+        );
+
+        return new JwtSecurityTokenHandler().WriteToken(token);
+    }
+}