bucket_items.rb

def bucket_items_applies?(discount)
  @application_count = 0

  discount.bucket.bucket_items.all.each do |bucket_item|
    @cloned_items = items.map(&:clone)

    matching_line_item_product_index = find_line_item_product_index(bucket_item)
    return false if matching_line_item_product_index.blank?

    allocate_discount(matching_line_item_product_index: matching_line_item_product_index, discount: discount, bucket_item: bucket_item)
    line_token = reduce_line_quantities(bucket_item)
    @applicable_lines << line_token
  end

  true
end

def find_line_item_product_index(bucket_item)
  product_present? = bucket_item.product.present?
  bucket_item_type_id = product_present? ? bucket_item.product.id : bucket_item.line.id
  line_item_product_index.select { |_, product| (product_present? product.id : product.line.id) == bucket_item_type_id }
end

def reduce_line_quantities(bucket_item)
  line_token = bucket_item.product.present? ? bucket_item.product.line.to_gid.to_s : bucket_item.line.to_gid.to_s
  @line_quantities_index[line_token] -= bucket_item.minimum_quantity
  line_token
end