public AstronomicalChart Build(string input)
{
input = input.Trim();
var commands = Split(input).ToList();
var objects = new Dictionary <string, AstronomicalObject>();
AstronomicalChart result = null;
foreach (var command in commands)
{
AstronomicalObject primary;
if (!objects.TryGetValue(command.Item1, out primary))
{
primary = new AstronomicalObject(command.Item1);
objects.Add(primary.Name, primary);
}
if (result == null && primary.Name == "COM")
{
result = new AstronomicalChart(primary);
}
AstronomicalObject satellite;
if (!objects.TryGetValue(command.Item2, out satellite))
{
satellite = new AstronomicalObject(command.Item2);
objects.Add(satellite.Name, satellite);
}
primary.AddSatellite(satellite);
}
return(result);
}
public AstronomicalRouteFinder(AstronomicalChart chart)
{
_chart = chart ?? throw new ArgumentNullException(nameof(chart));
}