Hi, really need your guys help.
I'm trying to create a tiered fixed price offer.
Order 3 - for $X
Order 5 for $Y
Order 8 for $Z
However I can't find example in Shopify supplied guide. I was able to create only for 1 offer not tiered like example below. Could anyone help me how can I create similar script as below, BUT tiered?
# ================================ Customizable Settings ================================
# ================================================================
# Buy X of Product Y for $Z
#
# Buy a certain number of matching items for a specific price.
# For example:
#
# "Buy 2 t-shirts for $20"
#
# - 'product_selector_match_type' determines whether we look for
# products that do or don't match the entered selectors. Can
# be:
# - ':include' to check if the product does match
# - ':exclude' to make sure the product doesn't match
# - 'product_selector_type' determines how eligible products
# will be identified. Can be either:
# - ':tag' to find products by tag
# - ':type' to find products by type
# - ':vendor' to find products by vendor
# - ':product_id' to find products by ID
# - ':variant_id' to find products by variant ID
# - ':subscription' to find subscription products
# - ':all' for all products
# - 'product_selectors' is a list of identifiers (from above)
# for qualifying products. Product/Variant ID lists should
# only contain numbers (ie. no quotes). If ':all' is used,
# this can also be 'nil'.
# - 'quantity_to_buy' is the number of products needed to
# qualify
# - 'final_price` is the amount to charge for all products that
# are part of the offer
# - 'discount_message' is the message to show when a discount
# is applied
# ================================================================
BUY_X_GET_Y_FOR_Z = [
{
product_selector_match_type: :include,
product_selector_type: :tag,
product_selectors: ["your_tag"],
quantity_to_buy: 2,
final_price: 100,
discount_message: 'Buy 2 for $20',
},
]
# ================================ Script Code (do not edit) ================================
# ================================================================
# ProductSelector
#
# Finds matching products by the entered criteria.
# ================================================================
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 }
(@match_type == :include) == @selectors.include?(line_item.variant.product.product_type.downcase.strip)
end
def vendor(line_item)
@selectors = @selectors.map { |selector| selector.downcase.strip }
(@match_type == :include) == @selectors.include?(line_item.variant.product.vendor.downcase.strip)
end
def product_id(line_item)
(@match_type == :include) == @selectors.include?(line_item.variant.product.id)
end
def variant_id(line_item)
(@match_type == :include) == @selectors.include?(line_item.variant.id)
end
def subscription(line_item)
!line_item.selling_plan_id.nil?
end
def all(line_item)
true
end
end
# ================================================================
# DollarDiscountApplicator
#
# Applies the entered discount to the supplied line item.
# ================================================================
class DollarDiscountApplicator
def initialize(discount_message)
@discount_message = discount_message
end
def apply(line_item, discount_amount)
new_line_price = line_item.line_price - discount_amount
line_item.change_line_price(new_line_price, message: @discount_message)
end
end
# ================================================================
# BuyXOfYForZCampaign
#
# Buy a certain number of matching items for a specific price.
# ================================================================
class BuyXOfYForZCampaign
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],
)
eligible_items = cart.line_items.select { |line_item| product_selector.match?(line_item) }
next if eligible_items.nil?
eligible_item_count = eligible_items.map(&:quantity).reduce(0, :+)
quantity_to_buy = campaign[:quantity_to_buy]
number_of_offers = (eligible_item_count / quantity_to_buy).floor
next unless number_of_offers > 0
number_of_discountable_items = number_of_offers * quantity_to_buy
total_offer_price = Money.new(cents: 100) * (number_of_offers * campaign[:final_price])
discount_applicator = DollarDiscountApplicator.new(campaign[:discount_message])
self.loop_items(cart, eligible_items, number_of_discountable_items, total_offer_price, discount_applicator)
end
end
def loop_items(cart, line_items, num_to_discount, total_price, discount_applicator)
current_price = Money.zero
avg_price = total_price * (1 / num_to_discount)
line_items = line_items.sort_by { |line_item| line_item.variant.price }
line_items.each do |line_item|
break if num_to_discount <= 0
if line_item.quantity > num_to_discount
split_line_item = line_item.split(take: num_to_discount)
discount_amount = split_line_item.line_price - (total_price - current_price)
discount_applicator.apply(split_line_item, discount_amount)
position = cart.line_items.find_index(line_item)
cart.line_items.insert(position + 1, split_line_item)
break
elsif line_item.quantity == num_to_discount
discount_amount = line_item.line_price - (total_price - current_price)
discount_applicator.apply(line_item, discount_amount)
break
else
if line_item.variant.price <= avg_price
current_price += line_item.line_price
else
discount_amount = (line_item.variant.price - avg_price) * line_item.quantity
current_price += (line_item.line_price - discount_amount)
discount_applicator.apply(line_item, discount_amount)
end
num_to_discount -= line_item.quantity
end
end
end
end
CAMPAIGNS = [
BuyXOfYForZCampaign.new(BUY_X_GET_Y_FOR_Z),
]
CAMPAIGNS.each do |campaign|
campaign.run(Input.cart)
end
Output.cart = Input.cart
- Dmitry
