internal override async Task <Dictionary <int, Tle> > FetchNewTles()
{
if (File.Exists(_localFilename))
{
using (var file = File.OpenRead(_localFilename))
{
using (var sr = new StreamReader(file))
{
var dateLine = sr.ReadLine();
if (DateTime.TryParse(dateLine, CultureInfo.InvariantCulture, DateTimeStyles.AdjustToUniversal,
out var date) && DateTime.UtcNow - date < MaxAge)
{
LastRefresh = date;
var restOfFile = sr.ReadToEnd()
.Replace("\r\n", "\n") // normalize line endings
.Split(new[] { '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries); // split into lines
var elementSets = Tle.ParseElements(restOfFile, ThreeLine);
return(elementSets.ToDictionary(elementSet => (int)elementSet.NoradNumber));
}
}
}
}
var tles = await base.FetchNewTles();
WriteOutNewTles(tles);
return(tles);
}
internal virtual async Task <Dictionary <int, Tle> > FetchNewTles()
{
var tles = new Dictionary <int, Tle>();
using (var wc = new HttpClient())
{
foreach (var source in _sources)
{
var str = await wc.GetStringAsync(source);
var file = str
.Replace("\r\n", "\n") // normalize line endings
.Split(new[] { '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries); // split into lines
var elementSets = Tle.ParseElements(file, true);
foreach (var elementSet in elementSets)
{
tles.Add((int)elementSet.NoradNumber, elementSet);
}
}
}
return(tles);
}
protected static void PopulateTleTable(string str, Dictionary <int, Tle> tles)
{
var file = str
.Replace("\r\n", "\n") // normalize line endings
.Split(new[] { '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries); // split into lines
var elementSets = Tle.ParseElements(file, true);
foreach (var elementSet in elementSets)
{
tles.Add((int)elementSet.NoradNumber, elementSet);
}
}
/// <summary>
/// Create a new Tle as a copy of the specified one
/// </summary>
/// <param name="tle">Object to copy from</param>
public Tle(Tle tle)
{
Name = tle.Name;
Line1 = tle.Line1;
Line2 = tle.Line2;
NoradNumber = tle.NoradNumber;
IntDesignator = tle.IntDesignator;
Epoch = tle.Epoch;
_meanMotionDt2 = tle._meanMotionDt2;
_meanMotionDdt6 = tle._meanMotionDdt6;
_bstar = tle._bstar;
_inclination = tle._inclination;
_rightAscendingNode = tle._rightAscendingNode;
_eccentricity = tle._eccentricity;
_argumentPerigee = tle._argumentPerigee;
_meanAnomaly = tle._meanAnomaly;
_meanMotion = tle._meanMotion;
_orbitNumber = tle._orbitNumber;
}
private void LoadTles(bool threeLine, IEnumerable <string> sourceFilenames)
{
_tles = new Dictionary <int, Tle>();
foreach (var sourceFilename in sourceFilenames)
{
using (var file = File.OpenRead(sourceFilename))
{
using (var sr = new StreamReader(file))
{
var restOfFile = sr.ReadToEnd()
.Replace("\r\n", "\n") // normalize line endings
.Split(new[] { '\r', '\n' }, StringSplitOptions.RemoveEmptyEntries); // split into lines
var elementSets = Tle.ParseElements(restOfFile, threeLine);
var tempSet = elementSets.ToDictionary(elementSet => (int)elementSet.NoradNumber);
_tles = _tles.Concat(tempSet.Where(kvp => !_tles.ContainsKey(kvp.Key)))
.ToDictionary(x => x.Key, x => x.Value);
}
}
}
}
/// <inheritdoc />
protected bool Equals(Tle other)
{
return(string.Equals(Line1, other.Line1) && string.Equals(Line2, other.Line2));
}