public static Yard Parse(String input)
{
int width, height;
string[] lines = input.Split(new string[] { Environment.NewLine }, StringSplitOptions.None);
if (!lines[0].Contains("x"))
{
throw new FormatException("First line should contain the dimensions of the grid");
}
{
string[] temp = lines[0].Split('x');
width = int.Parse(temp[0]);
height = int.Parse(temp[1]);
}
Yard yard = new Yard(width, height);
{
Regex tracks = new Regex(@"(?<name>T[\w]+?) (?<length>[0-9]+)m on \((?<x>[0-9]+),\s?(?<y>[0-9]+)\) w(?<size>[0-9]+)");
var collection = tracks.Matches(input);
foreach (Match match in collection)
{
String name = match.Groups["name"].Value;
int length = int.Parse(match.Groups["length"].Value);
int x = int.Parse(match.Groups["x"].Value);
int y = int.Parse(match.Groups["y"].Value);
int w = int.Parse(match.Groups["size"].Value);
yard.tracks[name] = new Track(name, length, new Point(x, y), w);
}
}
{
Regex switches = new Regex(@"(?<name>W[\w]+?) on \((?<x>[0-9]+),\s?(?<y>[0-9]+)\)");
var collection = switches.Matches(input);
foreach (Match match in collection)
{
String name = match.Groups["name"].Value;
int x = int.Parse(match.Groups["x"].Value);
int y = int.Parse(match.Groups["y"].Value);
yard.switches[name] = new Switch(name, x, y);
}
}
{
Regex lrx = new Regex(@"l\((?<id>\w+?)\)");
Regex rrx = new Regex(@"r\((?<id>\w+?)\)");
Regex nrx = new Regex(@"(?<id>\w+)");
Func <String, Point> extract = s =>
{
var lm = lrx.Match(s);
if (lm.Success)
{
String id = lm.Groups["id"].Value;
Track track = yard.tracks[id];
return(new Point(track.left.X, track.left.Y));
}
var rm = rrx.Match(s);
if (rm.Success)
{
String id = rm.Groups["id"].Value;
Track track = yard.tracks[id];
return(new Point(track.right.X, track.right.Y));
}
var nm = nrx.Match(s);
if (nm.Success)
{
String id = nm.Groups["id"].Value;
Switch sw = yard.switches[id];
return(new Point(sw.X, sw.Y));
}
throw new FormatException($"{s} was invalid format");
};
foreach (var line in lines)
{
if (!line.StartsWith("---"))
{
continue;
}
string[] entry = line.Replace("---", "").Split(new[] { " - " }, StringSplitOptions.None);
var one = extract(entry[0]);
var two = extract(entry[1]);
yard.connections.Add(new Connection(one, two));
}
}
return(yard);
}
