private void LoadRulesAndMessages(List <string> input)
{
var index = 0;
for (int i = 0; i < input.Count; i++, index++)
{
if (input[i].Length == 0)
{
index++;
break;
}
else
{
var parts = input[i].Split(": ");
var ruleNumber = parts[0];
Rules.Add(parts[0], parts[1]);
if (parts[1].Contains("a") || parts[1].Contains("b"))
{
ResolvedRules.Add(parts[0], parts[1].Replace("\"", ""));
}
}
}
for (int i = index; i < input.Count; i++)
{
Messages.Add(input[i]);
}
}
private string ResolveRule(string ruleNumber)
{
if (ResolvedRules.ContainsKey(ruleNumber))
{
return(ResolvedRules[ruleNumber]);
}
var ruleText = Rules[ruleNumber];
var ruleSections = ruleText.Split(" | ");
var stringBuilder = new StringBuilder();
stringBuilder.Append("(");
for (int i = 0; i < ruleSections.Length; i++)
{
var rules = ruleSections[i].Split(" ");
foreach (var rule in rules)
{
stringBuilder.Append(ResolveRule(rule));
}
if (i < ruleSections.Length - 1)
{
stringBuilder.Append("|");
}
}
stringBuilder.Append(")");
ResolvedRules.Add(ruleNumber, stringBuilder.ToString());
return(stringBuilder.ToString());
}