Question

I would like to build a Facebook Like-functionality for a video competition (currently not connected with Facebook in any way) where the like button gets the total amount of likes as a callback when clicked so that I can save it in my database and use as the primary voting system.

Is it possible to build this solution, preferably in Javascript?

EDIT:

What I want to do is

• Implement a “Like”-button
• When clicked, like request is sent to Facebook
• When the request is processed, a callback function is activated.
• The callback function gets the total amount of likes as a parameter

Answer 1

Something along those lines:

FB.Event.subscribe('edge.create', function(response) {
  // user clicked like
  var query = FB.Data.query('SELECT like_count FROM link_stat WHERE url="http://example.com/current_url"');
  query.wait(function(rows) {
    alert('number of likes ' + rows[0].like_count;
  });
});

edge.create is an event that should be fired when a user likes a page (see here). For some reason I couldn’t make it work a few months ago though.