stripe_charger.rb

class StripeCharger
  def initialize(email:, token:, order:)
    @email = email
    @token = token
    @order = order
  end

  def create_charge
    Stripe.api_key = ENV.fetch("STRIPE_SECRET_KEY")
    charge if order.costs_money?
  end

  private

    attr_reader :email, :token, :order

    def charge
      Stripe::Charge.create(
        customer: customer.id,
        amount: order.total,
        currency: "usd",
        description: "HomeCookin' Meal")
    end

    def customer
      if order.user.stripe_id
        returning_customer.tap do |rc|
          rc.source = token
          rc.save
        end
      else
        new_customer.tap do |nc|
          order.user.update(stripe_id: nc.id) if nc.id
        end
      end
    end

    def returning_customer
      Stripe::Customer.retrieve(order.user.stripe_id)
    end

    def new_customer
      Stripe::Customer.create(
        email: email,
        source: token,
      )
    end
end