public (DateTime?date, DateTime?time) Match(string value, DateTime seed)
{
DateTime?resultDate = null;
DateTime?resultTime = null;
var match = _regex.Match(value);
if (!match.Success)
{
return(resultDate, resultTime);
}
var groupNames = _regex.GetGroupNames();
int?dateMatchKey = GetKey(groupNames, match.Groups, "da");
if (dateMatchKey.HasValue)
{
string[] dateMatchArgs = GetParams(match.Groups, "db" + dateMatchKey);
resultDate = DatePattern[dateMatchKey.Value](seed, dateMatchArgs);
}
int?timeMatchKey = GetKey(groupNames, match.Groups, "ta");
if (timeMatchKey.HasValue)
{
seed = (resultDate ?? seed).Date;
string[] timeMatchArgs = GetParams(match.Groups, "tb" + timeMatchKey);
resultTime = TimePattern[timeMatchKey.Value](seed, timeMatchArgs);
}
return(resultDate, resultTime);
}
private string BuildRegex(PatternCollection pattern, char prefix)
{
StringBuilder sb = new StringBuilder();
var i = 0;
foreach (var key in pattern.Keys)
{
var key2 = key.Replace("(", $"(?<{prefix}b{i}>");
sb.Append($"(?<{prefix}a{i}>{key2})|");
i++;
}
return("(" + sb.ToString(0, sb.Length - 1) + ")");
}