title: FB APP: allow inapp invites to non app using fb users
body: <p>I'm stuck with this 'big picture' problem:</p>
  
  <p>In a fb-integrated web app I'm making, users can create little groups consisting of a couple of friends. They can invite a friend by sending a link (url).</p>
  
  <p>Users should be able to invite every friend they have. In fact, there are 2 types of friends:</p>
  
  <ul>
  <li>The ones who also use the app</li>
  <li>The ones who don't use the app (yet)</li>
  </ul>
  
  <p>I'm having a hard time figuring out a way to invite the latter ( the group of non-app using friends)</p>
  
  <p>First of all, the <strong>fb graph api doesn't give acces to non-app using friends</strong>. By labeling my app as a 'game', and by setting up the canvas, I can however get the 'invitable friends', i.e. the friends who don't play the game yet</p>
  
  <p>But a problem remains: I can't send a <strong>private message</strong> to an invitable friend, as I don't have their user id ( only a token to perform a game invite)</p>
  
  <p>By sending a <strong>game invite</strong>, An invited user would simply be <strong>redirected to the fb canvas app</strong>, without entering the right group</p>
  
  <p>I could use the fb <strong>share dialogbox</strong>, but then users have select the friends using the fb dialogbox ui, which strongly interferes with my mobile app's flow.</p>
  
  <p>I hope you're getting to understand my problem. I'm interested in hearing your thoughts about this.</p>