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varun.gupt |
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'''
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Created on 06-Jul-2011
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@author: Varun Gupta
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'''
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from shop2020.thriftpy.model.v1.user.ttypes import PromotionException
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from shop2020.model.v1.user.impl.PromotionRuleDataUtilities import get_coupon_usage_count, get_coupon_usage_count_by_user
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def execute(cart, coupon_code, args):
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if 'items' not in args or 'discount' not in args or 'handset_display_name' not in args:
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raise PromotionException(109, 'Error in rule arguments.')
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if 'usage_limit' in args and args['usage_limit'] is not None:
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if args['usage_limit'] <= get_coupon_usage_count(coupon_code):
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raise PromotionException(112, 'This promotion is over.')
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if 'usage_limit_for_user' in args and args['usage_limit_for_user'] is not None:
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if args['usage_limit_for_user'] <= get_coupon_usage_count_by_user(coupon_code):
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raise PromotionException(111, 'You have already used this coupon maximum possible times.')
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if not cart.lines:
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#TODO: Cart has no lines.
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return cart
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total_selling_price = 0
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total_discounted_price = 0
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cart_has_specified_item = False
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for line in cart.lines:
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total_selling_price += line.actualPrice * line.quantity
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if line.itemId in args['items']:
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cart_has_specified_item = True
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line.discountedPrice = round(line.actualPrice - args['discount'], 4)
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total_discounted_price += round(line.discountedPrice * line.quantity, 4)
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else:
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total_discounted_price += round(line.actualPrice * line.quantity, 4)
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if cart_has_specified_item is False:
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raise PromotionException(115, 'This coupon is applicable only for ' + args['handset_display_name'])
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cart.totalPrice = round(total_selling_price, 4)
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cart.discountedPrice = total_discounted_price
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return cart
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