def net(self, items):
settings = get_shop_shipping_settings()
calc = CartItemCalculator(self.context)
shipping_limit_from_gross = settings.shipping_limit_from_gross
free_shipping_limit = Decimal(str(settings.free_shipping_limit))
purchase_price = Decimal(0)
# calculate shipping from gross
if shipping_limit_from_gross:
purchase_price += calc.net(items) + calc.vat(items)
# calculate shipping from net
else:
purchase_price += calc.net(items)
# purchase price exceeds free shipping limit, no shipping costs
if free_shipping_limit and purchase_price > free_shipping_limit:
return Decimal(0)
flat_shipping_cost = Decimal(str(settings.flat_shipping_cost))
item_shipping_cost = Decimal(str(settings.item_shipping_cost))
shipping_costs = Decimal(0)
# item shipping costs set, calculate for contained cart items
if item_shipping_cost > Decimal(0):
for item in items:
if not cart_item_shippable(self.context, item):
continue
shipping_costs += item_shipping_cost * item[1]
# consider flat shipping cost if set
if flat_shipping_cost:
# item shipping costs exceed flat shipping costs
if shipping_costs > flat_shipping_cost:
return shipping_costs
# flat shipping costs apply
return Decimal(flat_shipping_cost)
# return calculated shipping costs
return shipping_costs
def calculate(self, items):
calc = CartItemCalculator(self.context)
if calc.net(items) + calc.vat(items) > Decimal(FREE_SHIPPING_LIMIT):
return Decimal(0)
return Decimal(FLAT_SHIPPING_COST)
