Add SendJSON() to uibroadcaster.

main/uibroadcast.go

@@ -11,6 +11,7 @@
 package main
 
 import (
+	"encoding/json"
 	"golang.org/x/net/websocket"
 	"sync"
 	"time"
@@ -36,6 +37,11 @@ func (u *uibroadcaster) Send(msg []byte) {
 	u.messages <- msg
 }
 
+func (u *uibroadcaster) SendJSON(i interface{}) {
+	j, _ := json.Marshal(&i)
+	u.Send(j)
+}
+
 func (u *uibroadcaster) AddSocket(sock *websocket.Conn) {
 	u.sockets_mu.Lock()
 	u.sockets = append(u.sockets, sock)