Query permissions using FQL

query_permissions.rb

require 'fb_graph'

permission_candidates = [
  :email,
  :sms,
  :read_stream,
  :publish_stream
]

permissions = FbGraph::Query.new(
  "SELECT #{permission_candidates.join(',')} FROM permissions WHERE uid = me()"
).fetch(ACCESS_TOKEN)

permission_candidates.each do |candidate|
  answer = case permissions.first[candidate]
  when 0
    "YES"
  when 1
    "NO"
  end
  puts "Has #{candidate} permission? => #{answer}"
end