public static ConfTopicMsgRangeDTO GetTopicMsgRange(this Data.EF.Conference conf, string topicMsgRange, bool required = false)
{
// Regex: ^(.+?)(\.(\d+)(\-(\d+))?)?$
// Groups: 1 (topic), 3 (lo), 5 (hi)
var regex = new Regex(@"^(.+?)(\.(\d+)\-?(\-(\d+))?)?$");
var match = regex.Match(topicMsgRange);
if (!match.Success)
{
return(null);
}
var result = new ConfTopicMsgRangeDTO();
if (match.Groups.Count >= 1)
{
result.topic = conf.GetTopicFromStr(match.Groups[1].Value, required);
}
if (match.Groups.Count >= 3 && int.TryParse(match.Groups[3].Value, out int i))
{
result.msgLow = i;
}
if (match.Groups.Count >= 5 && int.TryParse(match.Groups[5].Value, out i))
{
result.msgHigh = i;
}
if (!topicMsgRange.EndsWith("-") && result.msgHigh == 0)
{
result.msgHigh = result.msgLow;
}
return(result);
}