westondeboer

# Shipping Script to provide free shipping based on customer tags

class FreeShippingScript
  def initialize(cart, shipping_rates)
    @cart = cart
    @shipping_rates = shipping_rates
    @customer = cart.customer
  end

  def run

westondeboer

Input.cart.line_items.each do |line_item|
  product = line_item.variant.product
  max_qty_tag = product.tags.find { |tag| tag.start_with?('max_') }

  if max_qty_tag
    max_qty = max_qty_tag.gsub('max_', '').to_i
    reduce_by = line_item.quantity - max_qty
    line_item.split(take: reduce_by) if reduce_by > 0
  end
end