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namespace Xmpp.Xep.DateTimeProfiles {
public class Module {
public Regex DATETIME_REGEX;
public Module() {
DATETIME_REGEX = new Regex("""^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2})(\.(\d{3}))?(Z|((\+|\-)(\d{2}):(\d{2})))$""");
}
public DateTime? parse_string(string time_string) {
MatchInfo match_info;
if (DATETIME_REGEX.match(time_string, RegexMatchFlags.ANCHORED, out match_info)) {
int year = int.parse(match_info.fetch(1));
int month = int.parse(match_info.fetch(2));
int day = int.parse(match_info.fetch(3));
int hour = int.parse(match_info.fetch(4));
int minute = int.parse(match_info.fetch(5));
int second = int.parse(match_info.fetch(6));
DateTime datetime = new DateTime.utc(year, month, day, hour, minute, second);
if (match_info.fetch(9) != "Z") {
char plusminus = match_info.fetch(11)[0];
int tz_hour = int.parse(match_info.fetch(12));
int tz_minute = int.parse(match_info.fetch(13));
if (plusminus == '-') {
tz_hour *= -1;
tz_minute *= -1;
}
datetime.add_hours(tz_hour);
datetime.add_minutes(tz_minute);
}
return datetime;
}
return null;
}
public string to_datetime(DateTime time) {
return time.format("%Y-%m-%dT%H:%M:%SZ");
}
}
}
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