Created
May 3, 2017 20:40
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Buy X quantity of a product, Get Y% off
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DISCOUNTS_BY_QUANTITY = { | |
10_000 => 20, | |
1_000 => 15, | |
100 => 10, | |
10 => 5, | |
} | |
Input.cart.line_items.each do |line_item| | |
next if line_item.variant.product.gift_card? | |
quantity, discount = DISCOUNTS_BY_QUANTITY.find do |quantity, _| | |
line_item.quantity >= quantity | |
end | |
next unless discount | |
message = "#{discount}% off when buying at least #{quantity}." | |
line_item.change_line_price( | |
line_item.line_price * (Decimal.new(1) - discount.to_d / 100), | |
message: message, | |
) | |
end | |
Output.cart = Input.cart |
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