public GisFromToPair(GisLocation fromLoc, GisLocation toLoc)
{
this.FromLocation = fromLoc;
this.ToLocation = toLoc;
Key = $"{fromLoc}@@{toLoc}".GetHashCode();
}
public static bool GetFromTabDelimitedPairFile(string path, out List <GisFromToPair> pairList, out string explanation)
{
explanation = "";
pairList = new List <GisFromToPair>();
if (!File.Exists(path))
{
explanation = $"File={path} does not exist.";
return(false);
}
try
{
string[] lines = File.ReadAllLines(path);
int nn = 0;
foreach (string line in lines)
{
string[] tokens = line.Split('\t');
if (tokens.Length != 3)
{
explanation = $"Line={nn} Text={line}. Expected 3 tokens, found={tokens.Length}";
return(false);
}
GisLocation fromLoc = GisLocation.ParseFromString(tokens[1], out explanation);
if (fromLoc == null)
{
explanation = $"Line={nn}. Cannot Parse Origin={tokens[1]}";
return(false);
}
GisLocation toLoc = GisLocation.ParseFromString(tokens[2], out explanation);
if (toLoc == null)
{
explanation = $"Line={nn}. Cannot Parse Destination={tokens[2]}";
return(false);
}
GisFromToPair pair = new GisFromToPair(fromLoc, toLoc);
if (pair == null)
{
explanation = $"Line={nn}. Text={line}. Cannot Create Pair.";
return(false);
}
pairList.Add(pair);
nn++;
}
return(true);
}
catch (Exception ex)
{
explanation = $"Path={path} Err={ex.Message}";
return(false);
}
}
/// <summary>
/// Format is address, city state zip
/// Note that the city contain spaces, and that the only comma in the line follows the address.
/// </summary>
/// <param name="encoded"></param>
/// <param name="explanation"></param>
/// <returns></returns>
public static GisLocation ParseFromString(string encoded, out string explanation)
{
explanation = "";
try
{
string[] tokens = encoded.Split(',');
if (tokens.Count() != 2)
{
explanation = $"Encoded={encoded} Expected a comma following the address";
return(null);
}
GisLocation loc = new GisLocation();
loc.address = tokens[0];
string[] fragments = tokens[1].Trim().Split(' ');
List <string> tokenList = new List <string>();
foreach (string frag in fragments)
{
if (frag.Trim() != "")
{
tokenList.Add(frag);
}
}
// The last token is the zip, next to last is the state, and all others are space delimited city
int count = tokenList.Count;
if (count < 3)
{
explanation = $"Encoded={encoded}. Expected city, state, and zip";
return(null);
}
loc.zip = tokenList[count - 1];
loc.state = tokenList[count - 2];
StringBuilder sb = new StringBuilder();
for (int ii = 0; ii < tokenList.Count - 3; ii++)
{
sb.Append(tokenList[ii] + " ");
}
loc.city = sb.ToString().Trim();
return(loc);
}
catch (Exception ex)
{
explanation = $"Encoded={encoded}. Err={ex.Message}";
return(null);
}
}