mycorerepository/MyCore/Controllers/Helpers/MQTTController.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Mqtt.Client.AspNetCore.Services;
using MQTTnet;
using MQTTnet.Client;
using MQTTnet.Client.Options;
using MyCore.Interfaces.DTO;

namespace MyCore.Controllers
{
    [Authorize] // TODO role (Roles = "Admin")]
    [Route("api/mqtt")]
    [ApiController]
    public class MQTTController : ControllerBase
    {
        private readonly IMqttClientService _mqttClientService;
        private readonly IMqttOnlineClientService _mqttOnlineClientService;

        public MQTTController(MqttClientServiceProvider provider, MqttClientOnlineServiceProvider onlineProvider)
        {
            this._mqttClientService = provider.MqttClientService;
            this._mqttOnlineClientService = onlineProvider.MqttOnlineClientService;
        }


        /// <summary>
        /// Publish mqtt test
        /// </summary>
        /// <param name="mqttMessageDTO">Message to send</param>  
        [ProducesResponseType(typeof(bool), 200)]
        [ProducesResponseType(typeof(string), 400)]
        [ProducesResponseType(typeof(string), 500)]
        [HttpPost]
        public async Task<ObjectResult> PublishMessage([FromBody] MqttMessageDTO mqttMessageDTO)
        {
            try
            {
                if (mqttMessageDTO == null)
                    throw new ArgumentNullException("Incorrect parameters");

                bool isSucess = false;

                await MqttClientService.PublishMessage(mqttMessageDTO.Topic, mqttMessageDTO.Message).ContinueWith(res => {

                    if (res.Status == TaskStatus.RanToCompletion)
                    {
                        isSucess = true;  
                    }
                });

                if (mqttMessageDTO.Online)
                {
                    await MqttClientOnlineService.PublishMessage(mqttMessageDTO.Topic, mqttMessageDTO.Message).ContinueWith(res => {

                        if (res.Status == TaskStatus.RanToCompletion)
                        {
                            isSucess = true;
                        }
                        else
                        {
                            isSucess = false;
                        }
                    });
                }

                return new OkObjectResult(isSucess);
            }
            catch (ArgumentNullException ex)
            {
                return new BadRequestObjectResult(ex.Message) {};
            }
            catch (Exception ex)
            {
                return new ObjectResult(ex.Message) { StatusCode = 500 };
            }
        }
    }
}