module Omniauth
  module Social::Callbacks
    def google_oauth2
      signin_and_redirect
    end
  
    def facebook
      signin_and_redirect
    end
  
    def twitter
      signin_and_redirect
    end
  
    private
  
    def signin_and_redirect
      Social::Service.new(request, self).execute do |success, failure| 
        success.call { redirect_to root_path, notice: t('.notice') }
        failure.call { redirect_to root_path, alert: t('.alert') }
      end
    end
  end  
end