Fase 1: Inicialización del Backend .NET 10, Configuración de Dapper, Autenticación JWT y Entidades Base

src/SIGCM.Infrastructure/Services/TokenService.cs

@@ -0,0 +1,42 @@
+using System.IdentityModel.Tokens.Jwt;
+using System.Security.Claims;
+using System.Text;
+using Microsoft.Extensions.Configuration;
+using Microsoft.IdentityModel.Tokens;
+using SIGCM.Application.Interfaces;
+using SIGCM.Domain.Entities;
+
+namespace SIGCM.Infrastructure.Services;
+
+public class TokenService : ITokenService
+{
+    private readonly IConfiguration _config;
+
+    public TokenService(IConfiguration config)
+    {
+        _config = config;
+    }
+
+    public string GenerateToken(User user)
+    {
+        var key = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(_config["Jwt:Key"]!));
+        var creds = new SigningCredentials(key, SecurityAlgorithms.HmacSha256);
+        
+        var claims = new[]
+        {
+            new Claim(JwtRegisteredClaimNames.Sub, user.Username),
+            new Claim(ClaimTypes.Role, user.Role),
+            new Claim("Id", user.Id.ToString())
+        };
+
+        var token = new JwtSecurityToken(
+            issuer: _config["Jwt:Issuer"],
+            audience: _config["Jwt:Audience"],
+            claims: claims,
+            expires: DateTime.UtcNow.AddHours(4),
+            signingCredentials: creds
+        );
+
+        return new JwtSecurityTokenHandler().WriteToken(token);
+    }
+}