class Membership < ActiveRecord::Base

  belongs_to :group
  belongs_to :user

  validate_on_create :external_membership?

  attr_accessor :username,
    :password

 private

  def external_membership?
    if private?
      request = PrivateGroupApi::Request.new group.api
      request.username = username
      request.password = password
      request.on_failure do
        errors.add_to_base "You do not have an account with this group's web site"
      end
      request.on_error do
        errors.add_to_base 'There was a problem when trying to authenticate your account'
      end
      request.authenticate
    end
  end

end