return Presence messages in Recv

xmpp.go

@@ -222,15 +222,25 @@ type Chat struct {
 	Text   string
 }
 
+type Presence struct {
+	From string
+	To   string
+	Type string
+	Show string
+}
+
 // Recv wait next token of chat.
-func (c *Client) Recv() (chat Chat, err error) {
+func (c *Client) Recv() (event interface{}, err error) {
 	for {
 		_, val, err := next(c.p)
 		if err != nil {
 			return Chat{}, err
 		}
-		if v, ok := val.(*clientMessage); ok {
+		switch v := val.(type) {
+		case *clientMessage:
 			return Chat{v.From, v.Type, v.Body}, nil
+		case *clientPresence:
+			return Presence{v.From, v.To, v.Type, v.Show}, nil
 		}
 	}
 	panic("unreachable")
@@ -340,7 +350,7 @@ type clientPresence struct {
 	Type    string   `xml:"type,attr"` // error, probe, subscribe, subscribed, unavailable, unsubscribe, unsubscribed
 	Lang    string   `xml:"lang,attr"`
 
-	Show     string  `xml:"show,attr"`// away, chat, dnd, xa
+	Show     string `xml:"show"`        // away, chat, dnd, xa
 	Status   string `xml:"status,attr"` // sb []clientText
 	Priority string `xml:"priority,attr"`
 	Error    *clientError