In an earlier post, I detailed some important differences between version 2.0 of Facebook’s graph API and the old version. These include the replacement of global user ids with application-specific ids, and the new restriction of friend data to friends that have connected to the client application. If you’re not familiar with these differences but would like to read on, I recommend reading that post first. In this post, I turn my attention to building features with the restricted data that v2.0 affords us. I will walk through three related features:
- Finding your users’ Facebook friends who are already using your app.
- Notifying existing users of your app when their Facebook friends register.
- Allowing existing users to invite their Facebook friends to join.