annotations/Azaion.Common/Services/GpsMatcherClient.cs

using System.Diagnostics;
using Azaion.CommonSecurity;
using Azaion.CommonSecurity.DTO;
using MediatR;
using Microsoft.Extensions.Options;
using NetMQ;
using NetMQ.Sockets;

namespace Azaion.Common.Services;

public interface IGpsMatcherClient : IDisposable
{
    void StartMatching(StartMatchingEvent startEvent);
    void Stop();
}

public class StartMatchingEvent
{
    public string RouteDir           { get; set; } = null!;
    public string SatelliteImagesDir { get; set; } = null!;
    public int    ImagesCount        { get; set; }
    public double Latitude           { get; set; }
    public double Longitude          { get; set; }
    public int Altitude              { get; set; } = 400;
    public double CameraSensorWidth  { get; set; } = 23.5;
    public double CameraFocalLength  { get; set; } = 24;

    public override string ToString() =>
        $"{RouteDir},{SatelliteImagesDir},{ImagesCount},{Latitude},{Longitude},{Altitude},{CameraSensorWidth},{CameraFocalLength}";
}

public class GpsMatcherClient : IGpsMatcherClient
{
    private readonly IMediator _mediator;
    private readonly string _requestAddress;
    private readonly RequestSocket _requestSocket = new();
    private readonly string _subscriberAddress;
    private readonly SubscriberSocket _subscriberSocket = new();


    public GpsMatcherClient(IMediator mediator, IOptions<GpsDeniedClientConfig> gpsConfig)
    {
        _mediator = mediator;
        try
        {
            using var process = new Process();
            process.StartInfo = new ProcessStartInfo
            {
                FileName = SecurityConstants.ExternalGpsDeniedPath,
                WorkingDirectory = SecurityConstants.EXTERNAL_GPS_DENIED_FOLDER
                //Arguments = $"-e {credentials.Email} -p {credentials.Password} -f {apiConfig.ResourcesFolder}",
                //RedirectStandardOutput = true,
                //RedirectStandardError = true,
                //CreateNoWindow = true
            };

            process.OutputDataReceived += (_, e) => { if (e.Data != null) Console.WriteLine(e.Data); };
            process.ErrorDataReceived += (_, e) => { if (e.Data != null) Console.WriteLine(e.Data); };
            process.Start();
        }
        catch (Exception e)
        {
            Console.WriteLine(e);
            //throw;
        }

        _requestAddress = $"tcp://{gpsConfig.Value.ZeroMqHost}:{gpsConfig.Value.ZeroMqPort}";
        _requestSocket.Connect(_requestAddress);

        _subscriberAddress = $"tcp://{gpsConfig.Value.ZeroMqHost}:{gpsConfig.Value.ZeroMqSubscriberPort}";
        _subscriberSocket.Connect(_subscriberAddress);
        _subscriberSocket.Subscribe("");
        _subscriberSocket.ReceiveReady += async (_, e) => await ProcessClientCommand(e.Socket);
    }

    private async Task ProcessClientCommand(NetMQSocket socket)
    {
        while (socket.TryReceiveFrameString(TimeSpan.Zero, out var str))
        {
            if (string.IsNullOrEmpty(str))
                continue;

            switch (str)
            {
                case "FINISHED":
                    await _mediator.Publish(new GPSMatcherFinishedEvent());
                    break;
                case "OK":
                    await _mediator.Publish(new GPSMatcherJobAcceptedEvent());
                    break;
                default:
                    var parts = str.Split(',');
                    if (parts.Length != 5)
                        throw new Exception("Matching Result Failed");

                    await _mediator.Publish(new GPSMatcherResultEvent
                    {
                        Index = int.Parse(parts[0]),
                        Image = parts[1],
                        Latitude = double.Parse(parts[2]),
                        Longitude = double.Parse(parts[3]),
                        MatchType = parts[4]
                    });
                    break;
            }
        }
    }

    public void StartMatching(StartMatchingEvent e)
    {
        _requestSocket.SendFrame(e.ToString());
    }

    public void Stop() => _requestSocket.SendFrame("STOP");

    public void Dispose()
    {
        _requestSocket.SendFrame("EXIT");
        _requestSocket.Disconnect(_requestAddress);
        _requestSocket.Dispose();

        _subscriberSocket.Disconnect(_subscriberAddress);
        _subscriberSocket.Dispose();
    }
}