private static void InitEntries()
{
savedEntries = new List <TramLog>();
var values = data.Split('\n').Select(d => d.Trim().Split(',')).ToList();
foreach (var v in values)
{
var tl = new TramLog();
tl.Id = int.Parse(v[0].Substring(2));
tl.TheirId = v[1];
tl.ParsedId = long.Parse(v[1]);
savedEntries.Add(tl);
}
}
public static int?GuessId(string vehicleId)
{
if (savedEntries == null)
{
InitEntries();
}
if (string.IsNullOrWhiteSpace(vehicleId))
{
return(null);
}
long pId = 0;
if (!long.TryParse(vehicleId, out pId))
{
return(null);
}
TramLog result = null;
long distance = long.MaxValue;
foreach (var tl in savedEntries)
{
var d = Math.Abs(tl.ParsedId - pId);
if (d < 400 && d < distance && d % 4 == 0)
{
if (d == 0)
{
return(tl.Id);
}
distance = d;
result = tl;
}
}
if (result == null)
{
return(null);
}
var realDist = result.ParsedId - pId;
return((int)(result.Id - (realDist / 4)));
}