func chooseDevice(controller *spotcontrol.SpircController, reader *bufio.Reader) string {
devices := controller.ListDevices()
if len(devices) == 0 {
fmt.Println("no devices")
return ""
}
fmt.Println("\n choose a device:")
for i, d := range devices {
fmt.Printf("%v) %v %v \n", i, d.Name, d.Ident)
}
for {
fmt.Print("Enter device number: ")
text, _ := reader.ReadString('\n')
i, err := strconv.Atoi(strings.TrimSpace(text))
if err == nil && i < len(devices) && i >= 0 {
return devices[i].Ident
}
fmt.Println("invalid device number")
}
}
