private MeasMsg AddCellDepths(NMEAProprietarySentence nmeaSentence, MeasMsg measMsg)
{
bool cannotCompute = false;
const int blankingIndex = 4;
const int cellSizeIndex = 5;
double blanking = 0;
double cellSize = 0;
if (!measMsg.GetNumericDoubleObsValueByName(nameDictionary["I"][blankingIndex], out blanking))
{
cannotCompute = true;
}
else if (!measMsg.GetNumericDoubleObsValueByName(nameDictionary["I"][cellSizeIndex], out cellSize))
{
cannotCompute = true;
}
for (int i = 0; i < CellDepthVariables.Count; i++)
{
string dataValue = "///";
if (!cannotCompute)
{
double depth = blanking + (i + 1) * cellSize;
dataValue = depth.ToString();
}
measMsg.AddMeas(CellDepthVariables[i], dataValue.ToString());
}
return(measMsg);
}
public MeasMsg Parse(string message)
{
try
{
if (string.IsNullOrWhiteSpace(message))
{
return(null);
}
// Debug.WriteLine("Parsing AWAC message:" + message);
int dollarIndex = message.IndexOf("$");
if (dollarIndex == -1)
{
return(null);
}
int crLfIndex = message.IndexOf("/r/n");
if (crLfIndex == -1)
{
message = message + Environment.NewLine;
}
if (nameDictionary.Count == 0)
{
InitDictionary();
}
int index = message.IndexOf("$PN");
if (index == -1)
{
return(null);
}
if (index > 0)
{
message = message.Substring(index);
}
NMEAProprietarySentence nmeaSentence = (NMEAParser.Parse(message)) as NMEAProprietarySentence;
return(ParseMsg(nmeaSentence));
}
catch (Exception ex)
{
ExceptionHandler.HandleException(ex, "Error while parsing NMEA message." + message);
return(null);
}
}
private MeasMsg ParseMsg(NMEAProprietarySentence nmeaSentence)
{
MeasMsg result = new MeasMsg();
result.Time = DateTimeEx.Now;
var s = nmeaSentence.SentenceIDString.ToUpperInvariant();
if (!nameDictionary.ContainsKey(s))
{
return(null);
}
if (s == "C")
{
return(ParseCellVelocityData(nmeaSentence, result));
}
int len = nmeaSentence.parameters.Length;
for (int i = 0; i < len; i++)
{
string dataValue = string.Empty;
if (null != nmeaSentence.parameters[i])
{
dataValue = nmeaSentence.parameters[i].ToString();
}
result.AddMeas(nameDictionary[s][i], dataValue);
}
if (s == "I")
{
return(AddCellDepths(nmeaSentence, result));
}
return(result);
}
private MeasMsg ParseCellVelocityData(NMEAProprietarySentence nmeaSentence, MeasMsg measMsg)
{
const int cellIdIndex = 2;
const int speedIndex = 6;
const int dirIndex = 7;
int cell;
string cellId = nmeaSentence.parameters[cellIdIndex].ToString();
if (!int.TryParse(cellId, out cell))
{
SimpleFileWriter.WriteLineToEventFile(DirectoryName.EventLog, StringManager.GetString("Unable to parse Nortec AWAC NMEA message cell id. Received cellId was:") + cellId);
return(measMsg);
}
int index = cell - 1;
// Ignore any message from cells which do not have variables defined
if (-1 < index && index < CellSpeedVariables.Count)
{
var dataValue = nmeaSentence.parameters[speedIndex].ToString();
measMsg.AddMeas(CellSpeedVariables[index], dataValue);
}
if (-1 < index && index < CellDirectionVariables.Count)
{
var dataValue = nmeaSentence.parameters[dirIndex].ToString();
measMsg.AddMeas(CellDirectionVariables[index], dataValue);
}
if (measMsg.Count == 0)
{
return(null);
}
return(measMsg);
}