My website users will have the ability to post pictures in a private photo gallery. I would like for those users to be able to grant "view" permissions for their private gallery to other users.
- Bob (an authenticated user, not an admin) has a private photo gallery
- He wants Dave (another authenticated user, also not an admin) to be able to view his private photo gallery
- Bob grants permission to Dave, allowing Dave to view that gallery
- Bob can revoke permission from Dave at any time
Is there a module/configuration that will this type of user-controlled granting of permissions?