server-master/srcs/PhoenixLib.Auth.JWT/DependencyInjectionExtensions.cs

using System;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.DependencyInjection.Extensions;

namespace PhoenixLib.Auth.JWT
{
    public static class DependencyInjectionExtensions
    {
        public static void AddJwtFactoryFromEnv(this IServiceCollection services)
        {
            string jwtPrivateKey = Environment.GetEnvironmentVariable("JWT_PRIVATE_KEY");
            if (string.IsNullOrWhiteSpace(jwtPrivateKey))
            {
                throw new InvalidOperationException("JWT_PRIVATE_KEY environment variable is required");
            }

            services.TryAddSingleton<IJwtTokenFactory>(new JwtTokenFactory(jwtPrivateKey));
        }
    }
}