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namespace Xmpp.Xep.DateTimeProfiles {
public DateTime? parse_time(string time_string) {
return new DateTime.from_iso8601(time_string, null);
}
public TimeZone? parse_tzd(string tzd) {
if (tzd == "Z") return new TimeZone.utc();
// We support parsing TZD without positive or negative sign prefix for compatibility
string unprefixed;
if (tzd.length == 5) {
unprefixed = tzd;
} else if (tzd.length == 6 && (tzd.has_prefix("-") || tzd.has_prefix("+"))) {
unprefixed = tzd.substring(1);
} else {
return null;
}
int h_offset = int.parse(unprefixed.substring(0, 2));
int m_offset = int.parse(unprefixed.substring(3, 2));
int offset = h_offset * 60 * 60 + m_offset * 60;
if (tzd.has_prefix("-")) {
offset = -offset;
}
return new TimeZone.offset(offset);
}
public string format_time(DateTime time) {
return time.to_utc().format_iso8601().to_string();
}
public string format_tzd(DateTime time) {
TimeSpan utc_offset = time.get_utc_offset();
if (utc_offset == 0) return "Z";
int m_offset = (int) (utc_offset / TimeSpan.MINUTE).abs() % 60;
int h_offset = (int) (utc_offset / TimeSpan.HOUR).abs();
string prefix = utc_offset < 0 ? "-" : "+";
return "%s%02d:%02d".printf(prefix, h_offset, m_offset);
}
}
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