public void AddLink(NodeLink l)
{
this._links.Add(l);
}
// Returns the starting node
private static Node parseContentAndMakeGraph(string content)
{
Regex nodeStartRegex = new Regex("(Start )?Node: (.+)");
Regex linkRegex = new Regex("(.+) => (.+)");
Node startNode = null;
Dictionary<string, Node> nodes = new Dictionary<string, Node>();
Node currentNode = new Node();
string[] lines = content.Split(new char[] { '\n' });
for (int i = 0; i < lines.Length; i++)
{
string line = lines[i];
if (string.IsNullOrWhiteSpace(line))
{
continue;
}
if (nodeStartRegex.IsMatch(line)) {
Match m = nodeStartRegex.Match(line);
// Start of a node
if (!string.IsNullOrEmpty(currentNode.Content)) {
if (nodes.ContainsKey(currentNode.Title))
{
throw new Exception("There are two nodes named " + currentNode.Title);
}
else
{
nodes[currentNode.Title] = currentNode;
}
}
currentNode = new Node();
currentNode.Title = m.Groups[2].Value.Trim();
if (!string.IsNullOrEmpty(m.Groups[1].Value))
{
if (startNode != null)
{
throw new Exception("Second start node occurred (" + currentNode.Title + "); original was " + startNode.Title);
}
startNode = currentNode;
}
}
else if (line.Trim().Equals("Links:"))
{
i++;
line = lines[i];
while (!(nodeStartRegex.IsMatch(line)) && !string.IsNullOrEmpty(line.Trim()) && i < lines.Length) {
Match l = linkRegex.Match(line);
NodeLink n = new NodeLink();
n.Caption = l.Groups[1].ToString().Trim();
n.TargetName = l.Groups[2].ToString().Trim(); // Map later once all nodes are loaded
currentNode.AddLink(n);
i++;
if (i < lines.Length)
{
line = lines[i];
}
}
}
else if (!line.StartsWith("#"))
{
// # indicates a comment
currentNode.Content += line.Trim() + "\n\n";
}
}
// We're done; add the final node
if (nodes.ContainsKey(currentNode.Title))
{
throw new Exception("There are two nodes named " + currentNode.Title);
}
else
{
nodes[currentNode.Title] = currentNode;
}
nodes[currentNode.Title] = currentNode;
// Link everything up
foreach (Node n in nodes.Values)
{
foreach (NodeLink l in n.Links)
{
if (!nodes.ContainsKey(l.TargetName))
{
throw new Exception("Link " + l.Caption + " in node " + n.Title + " links to non-existent node " + l.TargetName);
}
else
{
l.Target = nodes[l.TargetName];
}
}
}
return startNode;
}
