public static bool TryParseFile(string filename, out MapData mapData)
{
try
{
using (var fileStream = File.OpenText(filename))
{
return(MapReader.TryParse(fileStream, out mapData));
}
}
catch (IOException e)
{
Console.WriteLine($"Failed to open map file '{filename}': '{e.Message}");
}
mapData = null;
return(false);
}
private static int Main(string[] args)
{
if (args.Length < 1)
{
Console.WriteLine("No map file specified");
return(1);
}
var filename = args[0];
bool didParse = false;
MapData mapData = null;
Console.WriteLine("Reading file");
didParse = MapReader.TryParseFile(filename, out mapData);
if (!didParse || mapData == null)
{
Console.WriteLine("Failed to parse file");
return(2);
}
Console.WriteLine("Creating Map");
Map map = new Map(mapData);
Console.WriteLine("Building nodes");
map.BuildNodes();
Console.WriteLine("Building links");
map.BuildLinks();
Console.WriteLine("Building paths");
map.BuildPaths();
Console.WriteLine("Finding best path");
Console.WriteLine();
var bestPath = map.FindPath();
if (bestPath != null)
{
Console.WriteLine($"Best path has {bestPath.Steps} steps with a descent of {bestPath.Descent}");
Console.WriteLine($"Starts at {bestPath.Nodes.First().X},{bestPath.Nodes.First().Y} and follows these directions:");
string[] directions = new string[bestPath.Nodes.Count - 1];
for (int idx = 1; idx < bestPath.Nodes.Count; idx++)
{
var toNode = bestPath.Nodes[idx];
var fromNode = bestPath.Nodes[idx - 1];
string direction = null;
if (toNode.Y > fromNode.Y)
{
direction = "North";
}
else if (toNode.Y < fromNode.Y)
{
direction = "South";
}
else if (toNode.X > fromNode.X)
{
direction = "East";
}
else if (toNode.X < fromNode.X)
{
direction = "West";
}
directions[idx - 1] = direction;
}
Console.WriteLine($"{string.Join("\n", directions)}");
}
else
{
Console.WriteLine("Failed to find best path");
}
return(0);
}