RobotApp/RobotApp/Services/RobotExtensions.cs

using RobotApp.Interfaces;
using RobotApp.Services.Robot;
using RobotApp.Services.State;
using System.Diagnostics.CodeAnalysis;

namespace RobotApp.Services;

public static class RobotExtensions
{
    public static IServiceCollection AddRobot(this IServiceCollection services)
    {
        services.AddSingleton<RobotStateMachine>();

        services.AddInterfaceServiceSingleton<ILocalization, RobotLocalization>();
        return services;
    }

    public static IServiceCollection AddInterfaceServiceSingleton<TService, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] TImplementation>(this IServiceCollection services) where TService : class where TImplementation : class, TService
    {
        services.AddSingleton<TImplementation>();
        services.AddSingleton<TService>(sp => sp.GetRequiredService<TImplementation>());
        return services;
    }

    public static IServiceCollection AddHostedServiceSingleton<[DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] THostedService>(this IServiceCollection services) where THostedService : class, IHostedService
    {
        services.AddSingleton<THostedService>();
        services.AddHostedService(sp => sp.GetRequiredService<THostedService>());
        return services;
    }

    public static IServiceCollection AddHostedInterfaceServiceSingleton<TService, [DynamicallyAccessedMembers(DynamicallyAccessedMemberTypes.PublicConstructors)] THostedService>(this IServiceCollection services) where TService : class where THostedService : class, IHostedService, TService
    {
        services.AddSingleton<THostedService>();
        services.AddSingleton<TService>(sp => sp.GetRequiredService<THostedService>());
        services.AddHostedService(sp => sp.GetRequiredService<THostedService>());
        return services;
    }
}