raceplanner/backend/Services/JwtTokenService.cs

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);
    }
}