//// POST api/logentries
        public void Post([FromBody] PostEntry value)
        {
            if (ModelState.IsValid)
            {
                try {
                    var user = repo.GetUserByApiKey(value.ApiKey);
                    if (user == null)
                    {
                        throw new HttpResponseException(new HttpResponseMessage(HttpStatusCode.NotFound)
                        {
                            Content = new StringContent(string.Format("Invalid API Key: {0}", value.ApiKey))
                        });
                    }

                    DateTime gasMeasurementMoment = value.Timestamp;

                    var hubContext = GlobalHost.ConnectionManager.GetHubContext <UsageHub>();
                    hubContext.Clients.Group(value.ApiKey).newCurrentUsage(value.Timestamp, value.CurrentUsage, value.CurrentRetour);

                    if (!DateTime.TryParseExact("20" + value.GasMeasurementMoment, "yyyyMMddHHmmss", CultureInfo.InvariantCulture, DateTimeStyles.None, out gasMeasurementMoment))
                    {
                        gasMeasurementMoment = value.Timestamp;
                    }


                    var logEntry = new LogEntry()
                    {
                        Timestamp            = value.Timestamp,
                        E1                   = value.E1,
                        E2                   = value.E2,
                        E1Retour             = value.E1Retour,
                        E2Retour             = value.E2Retour,
                        CurrentTariff        = value.CurrentTariff,
                        CurrentUsage         = value.CurrentUsage,
                        CurrentRetour        = value.CurrentRetour,
                        GasMeasurementMoment = gasMeasurementMoment,
                        GasMeasurementValue  = value.GasMeasurementValue,
                        PvCounter            = Convert.ToDecimal(value.PvProductionCounter) / 1000,
                        UserId               = user.UserId
                    };

                    repo.AddEntry(logEntry);

                    return;
                } catch (Exception ex) {
                    repo = Core.Factory.ResetILoggingRepository();

                    new LogEvent(ex.Message).Raise();

                    throw new HttpResponseException(HttpStatusCode.InternalServerError);
                }
            }
            else
            {
                throw new HttpResponseException(new HttpResponseMessage(HttpStatusCode.BadRequest)
                {
                    Content = new StringContent("Invalid data")
                });
            }
        }
        private static void TestRepository()
        {
            ILoggingRepository repo = Core.Factory.GetILoggingRepository();

            var dateTimeStart = new DateTime(2011, 10, 4, 0, 3, 12);
            var user          = repo.GetUserByApiKey("bWFpbEBwZXRlcmdlcnJpdHNlbi5ubA");

            Random rand = new Random();

            var e1Offset  = rand.NextDouble();
            var e2Offset  = rand.NextDouble();
            var gasOffset = rand.NextDouble();

            for (int i = 0; i < 100; i++)
            {
                var logEntry = new LogEntry();
                logEntry.Timestamp            = dateTimeStart.AddMinutes(90 * i);
                logEntry.UserId               = user.UserId;
                logEntry.E1                   = Convert.ToDecimal(e1Offset);
                logEntry.E2                   = Convert.ToDecimal(e2Offset);
                logEntry.GasMeasurementMoment = logEntry.Timestamp;
                logEntry.GasMeasurementValue  = Convert.ToDecimal(gasOffset);

                repo.AddEntry(logEntry);

                e1Offset  += rand.NextDouble();
                e2Offset  += rand.NextDouble();
                gasOffset += rand.NextDouble();

                if (i % 600 == 0)
                {
                    Debug.WriteLine(string.Format("{0} %", i / 600));
                }
            }
        }