[SEBA-818] Adding onu get command to BBSimCtl

Change-Id: I182effdd2d82e3b57d72c53c89fa978b75f16354
diff --git a/internal/bbsimctl/commands/onu.go b/internal/bbsimctl/commands/onu.go
index f99cb5c..fc89300 100644
--- a/internal/bbsimctl/commands/onu.go
+++ b/internal/bbsimctl/commands/onu.go
@@ -36,6 +36,13 @@
 
 type OnuSnString string
 type ONUList struct{}
+
+type ONUGet struct {
+	Args struct {
+		OnuSn OnuSnString
+	} `positional-args:"yes" required:"yes"`
+}
+
 type ONUShutDown struct {
 	Args struct {
 		OnuSn OnuSnString
@@ -50,6 +57,7 @@
 
 type ONUOptions struct {
 	List     ONUList     `command:"list"`
+	Get      ONUGet      `command:"get"`
 	ShutDown ONUShutDown `command:"shutdown"`
 	PowerOn  ONUPowerOn  `command:"poweron"`
 }
@@ -97,6 +105,30 @@
 	return nil
 }
 
+func (options *ONUGet) Execute(args []string) error {
+	client, conn := connect()
+	defer conn.Close()
+
+	ctx, cancel := context.WithTimeout(context.Background(), config.GlobalConfig.Grpc.Timeout)
+	defer cancel()
+	req := pb.ONURequest{
+		SerialNumber: string(options.Args.OnuSn),
+	}
+	res, err := client.GetONU(ctx, &req)
+
+	if err != nil {
+		log.Fatalf("Cannot not shutdown ONU %s: %v", options.Args.OnuSn, err)
+		return err
+	}
+
+	tableFormat := format.Format(DEFAULT_ONU_DEVICE_HEADER_FORMAT)
+	if err := tableFormat.Execute(os.Stdout, true, []*pb.ONU{res}); err != nil {
+		log.Fatalf("Error while formatting ONUs table: %s", err)
+	}
+
+	return nil
+}
+
 func (options *ONUShutDown) Execute(args []string) error {
 
 	client, conn := connect()