iot/projects/IoTCenter/Api/DeviceController.cs

using Application.Domain.Entities;
using Infrastructure.Data;
using Infrastructure.Extensions;
using IoTCenter.ViewModels;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Drawing;
using System.Globalization;
using System.Linq;
using Vibrant.InfluxDB.Client;
using Vibrant.InfluxDB.Client.Rows;

namespace UserCenter.Controllers
{
    [ApiVersion("1.0")]
    [Route("api/v{version:apiVersion}/[controller]/[action]")]
    [ApiController]
    public class DeviceController : ControllerBase
    {
        private readonly IConfiguration _cfg;
        private readonly IRepository<Device> _deviceRepo;

        public DeviceController(IConfiguration cfg,
            IRepository<Device> deviceRepo)
        {
            this._cfg = cfg;
            this._deviceRepo = deviceRepo;
        }

        [HttpPost]
        public ActionResult GetDevice([Required]string number)
        {
            try
            {
                var model = this._deviceRepo.ReadOnlyTable()
                    .Include(o => o.Data)
                    .Include(o => o.Product)
                    .ThenInclude(o => o.Apis)
                    .ThenInclude(o => o.Parameters)
                    .Where(o => o.Number == number)
                    .FirstOrDefault();
                return Ok(model);
            }
            catch (Exception ex)
            {
                ex.PrintStack();
                return Problem(ex.Message);
            }
        }

        [HttpPost]
        public IActionResult GetChartData([FromBody]ChartDataRequest model)
        {
            try
            {
                var device = this._deviceRepo.ReadOnlyTable().Include(o => o.Data).FirstOrDefault(o => o.Number == model.Number);
                var data = device.Data.FirstOrDefault(o => o.Key == model.Key);
                var url = this._cfg["influxdb:url"];
                var usr = this._cfg["influxdb:usr"];
                var pwd = this._cfg["influxdb:pwd"];
                var dbName = "iot";
                var measurementName = "data";
                var datasets = new List<object>();
                var labels = new List<string>();
                var hours = Convert.ToInt32(DateTime.Now.ToString("%z"));
                using (var client = new InfluxClient(new Uri(url), usr, pwd))
                {
                    var query = $"select { model.Key} from {measurementName} where time>now() - {model.Key} and DeviceNumber = '{model.Number}' limit 10000";
                    var result = client.ReadAsync<DynamicInfluxRow>(dbName, query).Result;
                    var rows = result.Results.FirstOrDefault()?
                        .Series.FirstOrDefault()?
                        .Rows;
                    datasets.Add(new
                    {
                        label = data.Name,
                        data = rows != null ? rows.Select(o => o.GetField(data.Key)).ToList() : new List<object>(),
                        backgroundColor = this.GetColor(data.Key),
                        fill = false
                    });
                    if (rows != null)
                    {
                        var format = model.Time.StartsWith("1") ? "H:mm" : (model.Time.StartsWith("7") ? "ddd" : "MMM-d");
                        labels = rows.Select(o => o.Timestamp.Value).Select(o => o.AddHours(hours).ToString(format, new CultureInfo("zh-CN"))).ToList();
                    }
                    var response = new
                    {
                        datasets,
                        labels
                    };
                    return Ok(response);
                }
            }
            catch (Exception ex)
            {
                ex.PrintStack();
                return Problem(ex.Message);
            }
        }
        private string GetColor(string key)
        {
            //var randomGen = new Random();
            //var names = (KnownColor[])Enum.GetValues(typeof(KnownColor));
            //var randomColorName = names[randomGen.Next(names.Length)];
            //var randomColor = Color.FromKnownColor(randomColorName);
            //return randomColor.Name;
            if (key == "Humidity")
            {
                return Color.FromKnownColor(KnownColor.Green).Name;
            }
            else if (key == "Electricity")
            {
                return Color.FromKnownColor(KnownColor.Red).Name;
            }
            else if (key == "Light")
            {
                return Color.FromKnownColor(KnownColor.Orange).Name;
            }
            return Color.FromKnownColor(KnownColor.DarkBlue).Name;
        }
    }
}