public static IEnumerable<Segment> Parse(string s)
{
var segments = new List<Segment>();
var stack = new Stack<Tuple<int, Segment>>();
var lines = s.Split('\n');
foreach (var line in lines)
{
var match = Regex.Match(line, @"^(\s*)(.*)$");
var whiteSpace = match.Result("$1").Replace("\t", " ");
var text = match.Result("$2");
if (String.IsNullOrWhiteSpace(text))
{
stack.Clear();
continue;
}
var segment = new Segment(text.Trim());
var indent = whiteSpace.Length;
if (stack.Any())
{
while (stack.Any() && stack.Peek().Item1 >= indent)
stack.Pop();
if (stack.Any())
stack.Peek().Item2.Add(segment);
}
if (stack.Any() == false)
segments.Add(segment);
stack.Push(Tuple.Create(indent, segment));
}
return segments;
}
public void Add(Segment s)
{
_segments.Add(s);
}
private static IEnumerable<PlanPart> Parse(Segment segment, PlanPart parent)
{
var parts = new List<PlanPart>();
if (parent == default(PlanPart))
{
parts.AddRange(RootPlanPart.Parse(segment.Text));
}
else
{
var text = segment.Text.Substring(1);
var prefix = segment.Text[0];
switch (prefix)
{
case '@':
parts.AddRange(LookupPart.Parse(text));
break;
case '<':
parts.AddRange(HasManyPart.Parse(text));
break;
case '>':
parts.AddRange(HasOnePart.Parse(text));
break;
default:
Console.Error.WriteLine("Invalid: " + segment.Text);
break;
}
}
foreach (var part in parts)
{
part.Children = segment.SubSegments.SelectMany(x => Parse(x, part)).ToArray();
}
return parts;
}