using System;

using System.Collections.Generic;

using Geotab.Checkmate;

using Geotab.Checkmate.ObjectModel;

public class Program

{

    public static void Main()

    {

        var geotabService = new GeotabService();

        var counter = 1;

        do

        {

            Console.WriteLine("Start Time: {0}", DateTime.Now.ToString("hh:mm:ss tt"));

            var vehicleLocations = geotabService.GetVehicleLocations();

            Console.WriteLine("    #{0}: {1}", counter++, vehicleLocations.Count);

            Console.WriteLine("End Time: {0}", DateTime.Now.ToString("hh:mm:ss tt"));

            System.Threading.Thread.Sleep(2000);

        } while (true);

    }

}

​

public class GeotabService

{

    private readonly API _api;

    private long? _version = null;

​

    public GeotabService()

    {

        var username = "-- change me --";

        var password = "-- change me --";

        var database = "-- change me --";

        _api = new API(username, password, null, database);

    }

​

    private void Authenticate()

    {

        if (!string.IsNullOrWhiteSpace(_api?.LoginResult?.Path))

        {

            // already authenticated

            return;

        }

        try

        {

            // Authenticate user

            _api.Authenticate();

        }

        catch (InvalidUserException ex)

        {

            throw new Exception("Invalid login credentails for Geotab.", ex);

        }

        catch (DbUnavailableException ex)

        {

            throw new Exception("The Geotab database is unavailable.", ex);

        }

        catch (Exception ex)

        {

            throw new Exception("Geotab failed to authenticate.", ex);

        }

    }

​

    public List<VehicleLocation> GetVehicleLocations()

    {

        Authenticate();

        object filter;

        if (_version == null)

        {

            filter = new

            {

                search = new LogRecordSearch

                {

                    FromDate = new DateTime(DateTime.Now.Year, 1, 1)

                }

            };

        }

        else

        {

            filter = new

            {

                fromVersion = _version.Value

            };

        }

        var logRecords = _api.Call<FeedResult<LogRecord>>("GetFeed", typeof(LogRecord), filter);

        _version = logRecords.ToVersion;

        var vehicleLocations = logRecords.Data.Select(logRecord => new VehicleLocation()

        {

            Imei = logRecord.Device?.Id?.ToString(),

            Latitude = (float)logRecord.Latitude,

            Longitude = (float)logRecord.Longitude

        });

        return vehicleLocations.ToList();

    }

​

}

​

public class VehicleLocation

{

    public string Imei { get; set; }

    public float Latitude { get; set; }

    public float Longitude { get; set; }

}