Shopify Script - Spend $X Get Y% Off

spend_$x_get_y%_off.rb

total = Input.cart.subtotal_price_was

# spend more than $150 earns 25% off
if total > Money.new(cents:100) * 150
  discount = 0.25
  message = "25% Off"
# spend between $50 and $150 earns 20% off
elsif total > Money.new(cents:100) * 50
  discount = 0.20
  message = "20% Off"
# spend less than $50 default 15% off
else
  discount = 0.15
  message = "15% Off"
end

Input.cart.line_items.each do |line_item|
  line_item.change_line_price(line_item.line_price * (1-discount), message: message)
end

Output.cart = Input.cart