Plugin request: Download via like/share

Hi,
I need a plugin where I can protect downloadlinks. User should only can download a file when they liked (Facebook, Goole+, Twitter) a specific URL. Also it would be great if they cannot see the link.
A plugin like "Pay with a lik" would be great, but it should only protect one link.

Is there already a plugin? If not, it would be great if someone can develop it! :slight_smile:

Kind regards,
Fabian
Hack4Life