facebook_fetch_share_count.rb

require 'net/http'
require 'uri'
require 'json'

class FacebookFetchShareCount
  attr_accessor :uri
  attr_reader :shares

  def initialize(uri)
    @uri = uri
    @shares = false
  end

  def fetch_shares
    uri = URI("http://graph.facebook.com/?id=" + @uri)
    res = Net::HTTP.get(uri)
    obj = JSON.parse(res)
    if obj
      return @shares = obj["shares"]
    end
  end

end