birbmap/Birdmap.API/Extensions/ServiceCollectionExtensions.cs

using Birdmap.API.Options;
using Birdmap.API.Services.Mqtt;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using System;

namespace Birdmap.API.Extensions
{
    public static class ServiceCollectionExtensions
    {
        public static IServiceCollection AddMqttClientServiceWithConfig(this IServiceCollection services, Action<AspCoreMqttClientOptions> configureOptions)
        {
            services.AddSingleton(serviceProvider =>
            {
                var optionBuilder = new AspCoreMqttClientOptions(serviceProvider);
                configureOptions(optionBuilder);
                return optionBuilder.Build();
            });
            services.AddSingleton<MqttClientService>();
            services.AddSingleton<IHostedService>(serviceProvider =>
            {
                return serviceProvider.GetService<MqttClientService>();
            });
            services.AddSingleton(serviceProvider =>
            {
                var mqttClientService = serviceProvider.GetService<MqttClientService>();
                var mqttClientServiceProvider = new MqttClientServiceProvider(mqttClientService);
                return mqttClientServiceProvider;
            });
            return services;
        }
    }
}