public static IEnumerable <DateTime> Extract(string source, DateTime dateTimeEval)
{
string[] tokens = Tokenizer.Tokenize(source);
TaggedItem[] items = new TagFactory(
new NumberTagger(),
new OperatorTagger(),
new DateTimeTagger(),
new IgnoreTagger())
.Tag(tokens);
TaggedItem[] aggregatedItems = NumberAggregator.Aggregate(items);
bool[] coverageMap = new bool[aggregatedItems.Length];
for (int i = 0; i < aggregatedItems.Length; i++)
{
for (int j = aggregatedItems.Length - 1; j >= i; j--)
{
if (!isCovered(coverageMap, i, j))
{
TaggedItem[] partial = new TaggedItem[j - i + 1];
Array.Copy(aggregatedItems, i, partial, 0, j - i + 1);
ITimeEvalNode node;
if (DateTimeParser.TryParse(partial, out node))
{
for (int index = i; index <= j; index++)
{
coverageMap[index] = true;
}
yield return(node.GetCurrentValue(dateTimeEval));
}
}
}
}
}
public static bool TryParse(string s, out ITimeEvalNode node)
{
string[] tokens = Tokenizer.Tokenize(s);
TaggedItem[] items = new TagFactory(
new NumberTagger(),
new OperatorTagger(),
new DateTimeTagger(),
new IgnoreTagger())
.Tag(tokens);
TaggedItem[] aggregatedItems = NumberAggregator.Aggregate(items);
return(TryParse(aggregatedItems, out node));
}