Migrating a Shopify Help Center script template

# ================================ Customizable Settings ================================
# ================================================================
# Tiered Discount by Spend
#
#   If the cart total is greater than (or equal to) an entered
#   threshold, the associated discount is applied to each item.
# ================================================================
SPENDING_THRESHOLDS = [
  {
    threshold: 30,
    discount_type: :percent,
    discount_amount: 10,
    discount_message: '10% off for spending over $30',
  },
  {
    threshold: 60,
    discount_type: :percent,
    discount_amount: 15,
    discount_message: '15% off for spending over $60',
  },
]

# ================================ 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
      1 - (discount_amount * 0.01)
    else
      Money.new(cents: 100) * discount_amount
    end
  end

  def apply(line_item)
    new_line_price = if @discount_type == :percent
      line_item.line_price * @discount_amount
    else
      [line_item.line_price - (@discount_amount * line_item.quantity), Money.zero].max
    end

    line_item.change_line_price(new_line_price, message: @discount_message)
  end
end

class TieredDiscountBySpendCampaign
  def initialize(campaigns)
    @campaigns = campaigns
  end

  def run(cart)
    applicable_campaign = nil

    @campaigns.each do |campaign|
      threshold = Money.new(cents: 100) * campaign[:threshold]
      applicable_campaign = campaign if cart.subtotal_price >= threshold
    end

    return if applicable_campaign.nil?

    discount_applicator = DiscountApplicator.new(
      applicable_campaign[:discount_type],
      applicable_campaign[:discount_amount],
      applicable_campaign[:discount_message],
    )

    cart.line_items.each do |line_item|
      discount_applicator.apply(line_item)
    end
  end
end

CAMPAIGNS = [
  TieredDiscountBySpendCampaign.new(SPENDING_THRESHOLDS),
]

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

Output.cart = Input.cart

Reconocido como Spend threshold discount y reconstruido como una oferta de tipo spend_goal. Estas son las claves de configuración reales con las que se guarda la oferta, así que puedes comparar tu propia reconstrucción campo por campo.

Creado en nuestra tienda de demostración pública, Meridian Goods, para que cada precio de aquí se pueda reproducir en lugar de darlo por bueno. El descuento de abajo es lo que calcula para este carrito exacto el mismo motor que se ejecuta en el pago.