Migrating a percentage off shipping script

Paire à risque D16. Ce fichier et son jumeau se ressemblent presque à l'identique et se comportent différemment, alors lisez les deux avant de décider lequel vous avez.

# ================================ Customizable Settings ================================
DISCOUNT_TYPE = :percent
DISCOUNT_AMOUNT = 10
DISCOUNT_MESSAGE = '10% off shipping'

# ================================ Script Code (do not edit) ================================
class DiscountApplicator
  def initialize(discount_type, discount_amount, discount_message)
    @discount_type = discount_type
    @discount_message = discount_message

    @discount_amount = if discount_type == :percent
      discount_amount * 0.01
    else
      Money.new(cents: 100) * discount_amount
    end
  end

  def apply(shipping_rate)
    discount_amount = if @discount_type == :percent
      shipping_rate.price * @discount_amount
    else
      @discount_amount > shipping_rate.price ? shipping_rate.price : @discount_amount
    end

    shipping_rate.apply_discount(discount_amount, message: @discount_message)
  end
end

class DiscountRatesCampaign
  def initialize(discount_applicator)
    @discount_applicator = discount_applicator
  end

  def run(cart, shipping_rates)
    shipping_rates.each do |shipping_rate|
      @discount_applicator.apply(shipping_rate)
    end
  end
end

CAMPAIGNS = [
  DiscountRatesCampaign.new(
    DiscountApplicator.new(DISCOUNT_TYPE, DISCOUNT_AMOUNT, DISCOUNT_MESSAGE),
  ),
]

CAMPAIGNS.each do |campaign|
  campaign.run(Input.cart, Input.shipping_rates)
end

Output.shipping_rates = Input.shipping_rates

Reconnu comme Shipping discount et reconstruit en offre de type free_shipping. Voici les vraies clés de configuration avec lesquelles l'offre est enregistrée, pour que vous puissiez comparer votre propre reconstruction champ par champ.

Construit sur notre boutique de démonstration publique, Meridian Goods, pour que chaque prix ici puisse être reproduit plutôt que cru sur parole. La remise ci-dessous est ce que le moteur qui tourne au paiement calcule pour ce panier précis.

This rule carries no condition at all, so it fires on any cart holding anything and there is no quiet cart to build. The negative check is an empty cart, which the app runs for you. That is correct behaviour, not a failure.