public class DeviceUtils {

    public static String createUniqueResource(String resource) {
        String res = String.format("%s_%s", resource, getDeviceUuid());
        Timber.d("Resource %s", res);
        return res;
    }

    public static String getDeviceUuid() {
        String uuid = UserPrefUtils.getString(AssistantApp.getContext(), UserPrefUtils.KEY_DEVICE_ID, null);
        if (uuid != null) {
            return uuid;
        }
        uuid = UUID.randomUUID().toString();
        UserPrefUtils.putString(AssistantApp.getContext(), UserPrefUtils.KEY_DEVICE_ID, uuid);
        return uuid;
    }

    @SuppressLint("HardwareIds")
    public static String generateDeviceIdentifier() {
        String androidId = Settings.Secure.getString(
                AssistantApp.getContext().getContentResolver(), Settings.Secure.ANDROID_ID);

        if (androidId == null || androidId.length() == 0){
            Timber.e("No ANDROID_ID! Generated a[32]");
            return new String(new char[32]).replace('\0', 'a');
        }

        StringBuilder androidIdBuilder = new StringBuilder(androidId);
        while (androidIdBuilder.length() < 32) androidIdBuilder.append(androidId);
        return androidIdBuilder.toString().substring(0, 32);
    }
}