can_bus: Add unit in the json that low-can emits

This commit allow if the unit is defined to display it
in the json emmits by low-can.

Change-Id: Ia09d4d9614eba6de93292ffab351fa1f4e612b73
Signed-off-by: Arthur Guyader <arthur.guyader@iot.bzh>
Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>

1 files changed, 7 insertions, 4 deletions

diff --git a/low-can-binding/utils/openxc-utils.cpp b/low-can-binding/utils/openxc-utils.cpp
index b88c45d9..e2cf8d59 100644
--- a/low-can-binding/utils/openxc-utils.cpp
+++ b/low-can-binding/utils/openxc-utils.cpp
@@ -434,20 +434,23 @@ bool jsonify_simple(const openxc_SimpleMessage& s_msg, json_object* json)
 ///
 /// @param[in] v_msg - const reference to an openxc_VehicleMessage
 /// struct to convert into a json object.
+/// @param[in] sig - signal reference to the subscription of openxc_VehicleMessage,
+/// to get more informations about it
 /// @param[out] json - pointer with the DynamicField converted into json object
 ///
 /// @return True if VehicleMessage has been transformed into json object
 ///  and false if not. In such case, a json object is returned { "error": "error msg"}
 ///
-bool jsonify_vehicle(const openxc_VehicleMessage& v_msg, json_object* json)
+bool jsonify_vehicle(const openxc_VehicleMessage& v_msg, std::shared_ptr<signal_t> sig, json_object* json)
 {
 	if(jsonify_simple(get_simple_message(v_msg), json))
 	{
+		if(sig != nullptr && sig->get_unit() != "")
+			json_object_object_add(json, "unit", json_object_new_string(sig->get_unit().c_str()));
+
 		if(v_msg.has_timestamp)
-		{
 			json_object_object_add(json, "timestamp", json_object_new_int64(v_msg.timestamp));
-			return true;
-		}
+
 		return true;
 	}
 	json_object_object_add(json, "error", json_object_new_string("openxc_SimpleMessage doesn't have name'"));