How to pull the number of Google+ friends from GPlus API? - ruby-on-rails

Question

I'd like to pull the number of Google+ friends that my users have once they have successfully connected their Google+ account through omniauth-gplus: the gplus gem.
I was able to display the number of Twitter Followers and Facebook Friends that my user have using the omniauth-twitter, and omniauth-facebook gems and this was easier as the documentation was clearer on those two gems and API's.
Please see the below code for how I am pulling the Facebook and Twitter followers/friends under the Users::OmniauthCallbacksController:
Authorizations:
class Authorization < ActiveRecord::Base
attr_accessible :provider, :uid, :token, :secret, :first_name, :last_name, :link, :name, :connections_count
def update_connections_number(provider)
if provider == 'Facebook'
connections_count = Koala::Facebook::API.new(self.token).get_connections("me", "friends").count
self.update_attributes(connections_count: connections_count)
elsif provider == 'LinkedIn'
client = LinkedIn::Client.new(ENV['FR_LINKEDIN_KEY'], ENV['FR_LINKEDIN_SECRET'])
client.authorize_from_access(self.token, self.secret)
self.update_attributes(connections_count: client.connections.total)
end
end
end
Users
class Users::OmniauthCallbacksController < Devise::OmniauthCallbacksController
def find_for_ouath(provider, access_token, resource=nil)
user, email, name, uid, auth_attr = nil, nil, nil, {}
case provider
when "Facebook"
uid = access_token['uid']
email = access_token['info']['email']
auth_attr = { :uid => uid, :token => access_token['credentials']['token'],
:secret => nil, :first_name => access_token['info']['first_name'],
:last_name => access_token['info']['last_name'], :name => access_token['info']['name'],
:link => access_token['extra']['raw_info']['link'] }
when "Twitter"
uid = access_token['extra']['raw_info']['id']
name = access_token['extra']['raw_info']['name']
auth_attr = { :uid => uid, :token => access_token['credentials']['token'],
:secret => access_token['credentials']['secret'], :first_name => access_token['info']['first_name'],
:last_name => access_token['info']['last_name'], :name => name,
:link => "http://twitter.com/#{name}", :connections_count => access_token['extra']['raw_info']['followers_count'] }
when 'LinkedIn'
uid = access_token['uid']
name = access_token['info']['name']
auth_attr = { :uid => uid, :token => access_token['credentials']['token'],
:secret => access_token['credentials']['secret'], :first_name => access_token['info']['first_name'],
:last_name => access_token['info']['last_name'],
:link => access_token['info']['public_profile_url'] }
when 'GPlus'
uid = access_token['uid']
name = access_token['info']['email']
auth_attr = { :uid => uid, :token => access_token['credentials']['token'],
:secret => access_token['credentials']['secret'], :first_name => access_token['info']['first_name'],
:last_name => access_token['info']['last_name'],
:link => access_token['info']['public_profile_url'] }
else
raise 'Provider #{provider} not handled'
end
if resource.nil?
if email
user = find_for_oauth_by_email(email, resource)
elsif uid && name
user = find_for_oauth_by_uid(uid, resource)
if user.nil?
user = find_for_oauth_by_name(name, resource)
end
end
else
user = resource
end
auth = user.authorizations.find_by_provider(provider)
if auth.nil?
auth = user.authorizations.build(:provider => provider)
user.authorizations << auth
end
auth.update_attributes auth_attr
auth.update_connections_number(provider)
return user
end
def find_for_oauth_by_uid(uid, resource=nil)
user = nil
if auth = Authorization.find_by_uid(uid.to_s)
user = auth.user
end
return user
end
def find_for_oauth_by_email(email, resource=nil)
if user = User.find_by_email(email)
user
else
user = User.new(:email => email, :password => Devise.friendly_token[0,20])
user.save
end
return user
end
def find_for_oauth_by_name(name, resource=nil)
if user = User.find_by_name(name)
user
else
first_name = name
last_name = name
user = User.new(:first_name => first_name, :last_name => last_name, :password => Devise.friendly_token[0,20], :email => "#{UUIDTools::UUID.random_create}#host")
user.save(:validate => false)
end
return user
end
end
How can I do this with Google+?
Cheers!