/// <summary>
/// Parses KML-based flight data
/// </summary>
/// <param name="flightData">The string of flight data</param>
/// <returns>True for success</returns>
public override bool Parse(string szData)
{
DataTable m_dt = ParsedData;
m_dt.Clear();
Boolean fResult = true;
byte[] bytes = Encoding.UTF8.GetBytes(szData);
KMLElements k = null;
MemoryStream stream = null;
try
{
stream = new MemoryStream(bytes);
using (StreamReader sr = new StreamReader(stream))
{
stream = null;
k = new KMLElements(XDocument.Load(sr));
if (k.ele22 != null)
{
fResult = ParseKMLv2(k);
}
else if (k.ele != null || k.eleArray != null)
{
fResult = ParseKMLv1(k);
}
else
{
throw new MyFlightbookException(Resources.FlightData.errNoKMLTrack);
}
}
}
catch (XmlException ex)
{
ErrorString = String.Format(CultureInfo.CurrentCulture, Resources.FlightData.errGeneric, ex.Message);
fResult = false;
}
catch (MyFlightbookException ex)
{
k.sbErr.Append(String.Format(CultureInfo.CurrentCulture, Resources.FlightData.errGeneric, ex.Message));
fResult = false;
}
finally
{
stream?.Dispose();
}
ErrorString = (k == null) ? string.Empty : k.sbErr.ToString();
return(fResult);
}
private bool ParseKMLv2(KMLElements k)
{
var timeStamps = k.ele22.Descendants(k.ns + "when");
var coords = k.ele22.Descendants(k.ns22 + "coord");
int cCoords = coords.Count();
List <Position> lstSamples = new List <Position>();
for (int iRow = 0; iRow < cCoords; iRow++)
{
var coord = coords.ElementAt(iRow);
string[] rgRow = coord.Value.Split(new char[] { ' ', ',' }, StringSplitOptions.RemoveEmptyEntries);
Position sample = new Position(rgRow);
if (iRow < timeStamps.Count())
{
sample.TypeOfSpeed = Position.SpeedType.Derived;
string szTimeStamp = timeStamps.ElementAt(iRow).Value;
if (!String.IsNullOrEmpty(szTimeStamp))
{
sample.Timestamp = szTimeStamp.ParseUTCDate();
}
}
lstSamples.Add(sample);
}
// Derive speed or see if it is available in extended data.
bool fHasSpeed = false;
var extendedData = k.xmlDoc.Descendants(k.ns22 + "SimpleArrayData");
if (extendedData != null)
{
// Go through the items to find speed
foreach (XElement e in extendedData)
{
var attr = e.Attribute("name");
if (attr != null && (String.Compare(attr.Value, "speedKts", StringComparison.OrdinalIgnoreCase) == 0 || String.Compare(attr.Value, "speed_kts", StringComparison.OrdinalIgnoreCase) == 0))
{
int i = 0;
int maxSample = lstSamples.Count;
foreach (XElement speedval in e.Descendants())
{
string szVal = speedval.Value;
if (i < maxSample && double.TryParse(szVal, out double sp))
{
Position p = lstSamples[i++];
p.Speed = sp;
p.TypeOfSpeed = Position.SpeedType.Reported;
fHasSpeed = true;
}
else
{
break;
}
}
break; // no need to go through any other elements in extended data
}
}
}
// derive speed if we didn't find it above
if (!fHasSpeed)
{
Position.DeriveSpeed(lstSamples);
}
// And put it into a data table
ToDataTable(lstSamples);
return(true);
}
private bool ParseKMLv1(KMLElements k)
{
bool fResult = true;
Regex r = new Regex("(-?[0-9.]+) *, *(-?[0-9.]+)(?: *, *(-?[0-9]+))? *", RegexOptions.Compiled);
string coords;
if (k.eleArray != null)
{
StringBuilder sb = new StringBuilder();
foreach (XElement e in k.eleArray)
{
sb.Append(e.Value.Replace("\r", " ").Replace("\n", " "));
}
coords = sb.ToString();
}
else if (k.eleCoords != null)
{
StringBuilder sb = new StringBuilder();
for (int i = 0; i < k.eleCoords.Count(); i++)
{
sb.AppendFormat(CultureInfo.InvariantCulture, "{0} ", (k.eleCoords.ElementAt(i).Value.Replace("\r", " ").Replace("\n", " ")));
}
coords = sb.ToString();
}
else
{
coords = k.ele.Value.Replace("\r", " ").Replace("\n", " ");
}
MatchCollection mc = r.Matches(coords);
if (mc.Count > 0)
{
List <Position> lstSamples = new List <Position>();
ArrayList al = new ArrayList();
for (int i = 1; i < mc[0].Groups.Count; i++)
{
if (mc[0].Groups[i].Value.Trim().Length > 0)
{
al.Add(mc[0].Groups[i].Value);
}
}
for (int iRow = 0; iRow < mc.Count; iRow++)
{
al.Clear();
GroupCollection gc = mc[iRow].Groups;
for (int i = 1; i < gc.Count; i++)
{
al.Add(gc[i].Value);
}
try
{
lstSamples.Add(new Position((string[])al.ToArray(typeof(string))));
}
catch (MyFlightbookException ex)
{
fResult = false;
k.sbErr.AppendFormat(CultureInfo.CurrentCulture, "{0}\r\n", ex.Message);
}
}
ToDataTable(lstSamples);
}
return(fResult);
}
