Basic Facebook App

We've designed a flash interface and integrated it to our application by using CANVAS Page. But now we should have a like button at the bottom of the page and after clicking it (and of course granting access to our app) we want to save user details like name, surname, fb id, -mail if possible- to our database. I don't know if it's possible to just have a like button to get access to user information so i designed the process starting with an app and by that liking it after granting access. Briefly at the bottom of the page we'll have a button to like the page and get their information.