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Ive got task to create application which can post data on users friends walls. As far as I know user has to accept permissions that application can post messages on his behalf of his friends walls.
Now I would like to make it like:
If user chooses friend to post message on his wall I would like to check whether receiver has got my app installed. If yes then message is post on his wall. If not invitation is sent.
Is something like that possible?
From: http://developers.facebook.com/docs/reference/api/user/
See the
installedproperty of theusergraph object.