Migrating a script scoped to a tag, vendor or product type

危险配对 D13。这个文件和它的搭档看起来几乎一样，行为却不同，在判断您手上是哪一个之前，请把两份都读一遍。

# ================================ Customizable Settings ================================
PRODUCT_DISCOUNTS = [
  {
    product_selector_match_type: :include,
    product_selector_type: :tag,
    product_selectors: ["sale"],
    discount_type: :percent,
    discount_amount: 20,
    discount_message: "20% off sale items",
  },
]

# ================================ Script Code (do not edit) ================================
class ProductSelector
  def initialize(match_type, selector_type, selectors)
    @match_type = match_type
    @comparator = match_type == :include ? 'any?' : 'none?'
    @selector_type = selector_type
    @selectors = selectors
  end

  def match?(line_item)
    if self.respond_to?(@selector_type)
      self.send(@selector_type, line_item)
    else
      raise RuntimeError.new('Invalid product selector type')
    end
  end

  def tag(line_item)
    product_tags = line_item.variant.product.tags.map { |tag| tag.downcase.strip }
    @selectors = @selectors.map { |selector| selector.downcase.strip }
    (@selectors & product_tags).send(@comparator)
  end

  def type(line_item)
    @selectors = @selectors.map { |selector| selector.downcase.strip }
    (@selectors.include?(line_item.variant.product.product_type.downcase.strip)) == (@match_type == :include)
  end

  def vendor(line_item)
    @selectors = @selectors.map { |selector| selector.downcase.strip }
    (@selectors.include?(line_item.variant.product.vendor.downcase.strip)) == (@match_type == :include)
  end

  def product_id(line_item)
    (@selectors.include?(line_item.variant.product.id)) == (@match_type == :include)
  end

  def variant_id(line_item)
    (@selectors.include?(line_item.variant.id)) == (@match_type == :include)
  end

  def all(line_item)
    true
  end
end

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

  def run(cart)
    @campaigns.each do |campaign|
      product_selector = ProductSelector.new(
        campaign[:product_selector_match_type],
        campaign[:product_selector_type],
        campaign[:product_selectors],
      )

      cart.line_items.each do |line_item|
        next unless product_selector.match?(line_item)
        line_item.change_line_price(
          line_item.line_price * (1 - (campaign[:discount_amount] * 0.01)),
          message: campaign[:discount_message],
        )
      end
    end
  end
end

CAMPAIGNS = [
  ProductDiscountCampaign.new(PRODUCT_DISCOUNTS),
]

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

Output.cart = Input.cart

识别为 Percentage off，重建为 volume 类型的优惠。下面是优惠实际保存时使用的配置键，您可以逐项核对自己的重建结果。

基于我们的公开演示店铺 Meridian Goods 搭建，因此这里的每个价格都可以复现，而不必凭信任接受。下方的折扣金额，是结账时运行的同一个引擎针对这个购物车算出的结果。

危险配对 D9。这个文件和它的搭档看起来几乎一样，行为却不同，在判断您手上是哪一个之前，请把两份都读一遍。

Input.cart.line_items.each do |li|
  next unless li.variant.product.tags.include?('sale')
  li.change_line_price(li.original_line_price * (1.0 - (20 / 100.0)), message: "20% off sale")
end

Output.cart = Input.cart

识别为 Percentage off，重建为 volume 类型的优惠。下面是优惠实际保存时使用的配置键，您可以逐项核对自己的重建结果。

基于我们的公开演示店铺 Meridian Goods 搭建，因此这里的每个价格都可以复现，而不必凭信任接受。下方的折扣金额，是结账时运行的同一个引擎针对这个购物车算出的结果。