twiml_builder.rb

module SMSWallet
  class TwimlBuilder
    def initialize(user)
      @user = user
      @response = Twilio::TwiML::Response.new do |r|
        r.Gather method: method, action: action, numDigits: 4 do |g|
          r.Say message
        end
        r.Say "We didn't receive any input. Goodbye!"
      end
    end

    def text
      response.text
    end

    private

    attr_reader :response, :user

    def message
      message = I18n.t("twiml.hello", name: user.name)
      message += if user.active?
                   I18n.t("twiml.active_user_pin")
                 else
                   I18n.t("twiml.new_user_pin")
                 end
    end

    def method
      "POST"
    end

    def action
      "/sms_transactions"
    end
  end
end