Function that turns Facebook insights into a flat structure.

preprocess.js

function preprocess(post){
    var flatPost = post.insights.data.reduce(function(post, insight){
        post[insight.name] = insight.values[0].value;
        return post;
    }, {});
 
    flatPost.likes = post.likes.summary.total_count;
    flatPost.comments = post.comments.summary.total_count;
    flatPost.shares = (post.shares || {'count': 0}).count;
 
    return flatPost;
}