From 51b558cd2cef8c66321eee4b2c2ede5af5df574b Mon Sep 17 00:00:00 2001
From: Jesse Kuang <2829915232@qq.com>
Date: Thu, 10 Jan 2019 23:36:50 +0800
Subject: [PATCH] add urn:xmpp:time; now response jabber GetInfo

---
 GNUmakefile     |  2 +-
 xmpp.go         |  4 ++++
 xmpp_version.go | 23 ++++++++++++++++-------
 3 files changed, 21 insertions(+), 8 deletions(-)

diff --git a/GNUmakefile b/GNUmakefile
index 00b2b5c..25808b9 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -20,7 +20,7 @@ MAKEFILE=GNUmakefile
 all: bin/example
 	@[ -d bin ] || exit
 
-bin/example: _example/example.go xmpp.go
+bin/example: _example/example.go xmpp.go xmpp_version.go
 	@[ -d bin ] || mkdir bin
 	go build -o $@ _example/example.go
 	@strip $@ || echo "example OK"
diff --git a/xmpp.go b/xmpp.go
index bb0b454..a2e6956 100644
--- a/xmpp.go
+++ b/xmpp.go
@@ -677,6 +677,10 @@ func (c *Client) Recv() (stanza interface{}, err error) {
 				if err := c.SendIQLast(v.ID, v.From, v.To); err != nil {
 					return Chat{}, err
 				}
+			case "urn:xmpp:time":
+				if err := c.SendIQtime(v.ID, v.From, v.To); err != nil {
+					return Chat{}, err
+				}
 			case "jabber:iq:roster":
 				var item rosterItem
 				var r Roster
diff --git a/xmpp_version.go b/xmpp_version.go
index b13f74e..05108ef 100644
--- a/xmpp_version.go
+++ b/xmpp_version.go
@@ -19,14 +19,23 @@ func (c *Client) SendVersion(id, toServer, fromU string) error {
 }
 
 func (c *Client) SendIQLast(id, toServer, fromU string) error {
-	_, err := fmt.Fprintf(c.conn, "<iq type='result' from='%s' to='%s'"+
-		"id='%s' type='result'>\n", xmlEscape(fromU),
-		xmlEscape(toServer), xmlEscape(id))
-	if err != nil {
-		return err
-	}
+	ss := fmt.Sprintf("<iq type='result' from='%s' to='%s'"+
+		" id='%s'>\n", xmlEscape(fromU), xmlEscape(toServer), xmlEscape(id))
 	tt := time.Now().Sub(c.loginTime)
-	_, err = fmt.Fprintf(c.conn, "<query xmlns='jabber:iq:last' "+
+	ss += fmt.Sprintf("<query xmlns='jabber:iq:last' "+
 		"seconds='%d'>Working</query>\n</iq>", int(tt.Seconds()))
+	_, err := fmt.Fprint(c.conn, ss)
+	return err
+}
+
+func (c *Client) SendIQtime(id, toServer, fromU string) error {
+	ss := fmt.Sprintf("<iq type='result' from='%s' to='%s'"+
+		" id='%s'>\n", xmlEscape(fromU), xmlEscape(toServer), xmlEscape(id))
+	tt := time.Now()
+	zoneN, _ := tt.Zone()
+	ss += fmt.Sprintf("<time xmlns='urn:xmpp:time'>\n<tzo>%s</tzo>"+
+		"<utc>%s</utc></time>\n</iq>", zoneN,
+		tt.UTC().Format("2006-01-02T15:03:04Z"))
+	_, err := fmt.Fprint(c.conn, ss)
 	return err
 }