public async Task <bool> UpdateData()
{
var json = await dataFetcher.UpdateData();
try
{
telemetry = JsonSerializer.Deserialize <TelemetryStorage>(json, jsonSerializerOptions);
await dataSaver.SaveTelemetryToFile(telemetry);
}
catch (ArgumentNullException ex)
{
string EventMessage = "An error occurred in TelemetryParser while updating data. An object to populate with values from JSON file was null.";
await EventLogger.LogExceptionForUserAndToFile(EventMessage, ex);
await EventLogger.LogExceptionToFile(EventMessage, ex.Message, ex.StackTrace);
return(false);
}
catch (JsonException ex)
{
string EventMessage = "An error occurred in TelemetryParser while updating data. Downloaded JSON file is invalid.";
await EventLogger.LogExceptionForUserAndToFile(EventMessage, ex);
return(false);
}
catch (Exception ex)
{
string EventMessage = "An unknown error occurred in TelemetryParser while updating data. ";
await EventLogger.LogExceptionForUserAndToFile(EventMessage, ex);
return(false);
}
return(true);
}
public TelemetryParser(IDataFetcher dataFetcher, IDataSaver dataSaver)
{
this.dataSaver = dataSaver;
this.dataFetcher = dataFetcher;
telemetry = new TelemetryStorage();
jsonSerializerOptions = new JsonSerializerOptions
{
PropertyNameCaseInsensitive = true,
};
}
public async Task SaveTelemetryToFile(TelemetryStorage telemetry)
{
string lineToSave = $"{telemetry.Timestamp},{telemetry.Temperature},{telemetry.Humidity},{telemetry.Pressure}";
try
{
using (StreamWriter writer = new StreamWriter(CSVFilePath, true))
{
await writer.WriteLineAsync(lineToSave);
}
}
catch (Exception ex)
{
await EventLogger.LogExceptionForUserAndToFile(
$"Could not write this line: {lineToSave} to CSV file. This data would not be stored.", ex);
}
}