Musify/backend/Core/Musify.Application/Configuration/ConfigurationDependencyInjection.cs

using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Options;

namespace Musify.Application.Configuration
{
    public static class ConfigurationDependencyInjection
    {
        public static IServiceCollection AddValidatedOptions<T>(this IServiceCollection services, IConfiguration configuration)
            where T : class, IConfigurationOptions =>
            services.AddValidatedOptions<T>(configuration, T.SectionName);

        public static IServiceCollection AddValidatedOptions<T>(
            this IServiceCollection services,
            IConfiguration configuration,
            string sectionName)
            where T : class
        {
            services
                .AddOptionsWithValidateOnStart<T>()
                .Bind(configuration.GetRequiredSection(sectionName))
                .ValidateDataAnnotations();

            services.AddSingleton(serviceProvider =>
                serviceProvider.GetRequiredService<IOptions<T>>().Value);

            return services;
        }
    }
}