From fbb2c7e133930142c30305e419457550cba22a75 Mon Sep 17 00:00:00 2001
From: Teppo Kurki <teppo.kurki@iki.fi>
Date: Thu, 18 Apr 2024 18:31:32 +0300
Subject: [PATCH] second tweak to buildMsg

---
 lib/stringMsg.js | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/lib/stringMsg.js b/lib/stringMsg.js
index d914b90..80a5a5c 100644
--- a/lib/stringMsg.js
+++ b/lib/stringMsg.js
@@ -19,9 +19,11 @@ const {
  * @param  {Object} [rest={}] Anything else to be added like len, timestamp, direction.
  * @return {Object}           All canId fields with format and data props added.
  */
-function buildMsg(canIdInfo, format, data, rest = {}) {
-  canIdInfo.format = canIdInfo.format ? canIdInfo.format : format
-  canIdInfo.data = canIdInfo.data ? canIdInfo.data : data
+function buildMsg(_canIdInfo, format, data, rest = {}) {
+  const canIdInfo = Object.assign({}, _canIdInfo, {
+    format,
+    data
+  })
   for (const property in rest) {
     if (canIdInfo[property] === undefined) {
       canIdInfo[property] = rest[property]