Add implementation for XEP-0202 Entity Time

1 files changed, 31 insertions, 2 deletions

diff --git a/xmpp-vala/src/module/xep/0082_date_time_profiles.vala b/xmpp-vala/src/module/xep/0082_date_time_profiles.vala
index 8b40d3ac..3237208e 100644
--- a/xmpp-vala/src/module/xep/0082_date_time_profiles.vala
+++ b/xmpp-vala/src/module/xep/0082_date_time_profiles.vala
@@ -1,11 +1,40 @@
 namespace Xmpp.Xep.DateTimeProfiles {
 
-public DateTime? parse_string(string time_string) {
+public DateTime? parse_time(string time_string) {
      return new DateTime.from_iso8601(time_string, null);
 }
 
-public string to_datetime(DateTime time) {
+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 = unprefixed.substring(0, 2).to_int();
+     int m_offset = unprefixed.substring(3, 2).to_int();
+     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);
+}
+
 }