[Owncloud] Limit Sharing (share api?)

[Sarah Jones]

Hi,

I'm trying to add a sharing limitation where you can only share with 
someone that is your "friend" (Facebook style).  I've started an app.

I've taken a look at the Sharing API; this seems to control shared 
items.  The documentation says that is API is under heavy development.  
Will you be adding an API feature to limit who you can share with?

I've taken a look at core/ajax/share.php where the options for who you 
can share with are users that you are in a group with (groups_only) and 
all users.  Looks like there is already commented out code in their for 
adding contacts to the list, so I could add the friend-only code there.  
Would this be the way to go?

Thanks,
~Sarah