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Rev 3386 Rev 3554
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    coupon = Coupon.get_by(coupon_code = coupon_code)
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    coupon = Coupon.get_by(coupon_code = coupon_code)
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    if coupon:
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    if coupon:
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        user_client = UserClient().get_client()
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        user_client = UserClient().get_client()
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        cart = user_client.getCart(cart_id)
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        cart = user_client.getCart(cart_id)
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        coupon_module = coupon.promotion.rule_execution_src.strip()
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        coupon_module = coupon.promotion.rule_execution_src.strip()
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        try:
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        try:
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            user_client.deleteDiscountsFromCart(cart_id)
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            imported_coupon_module = __import__("shop2020.model.v1.user.promotionrules", globals(), locals(), [coupon_module])
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            imported_coupon_module = __import__("shop2020.model.v1.user.promotionrules", globals(), locals(), [coupon_module])
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            rule = eval("imported_coupon_module." + coupon_module)
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            rule = eval("imported_coupon_module." + coupon_module)
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            args = eval(coupon.arguments) if coupon.arguments is not None else {}
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            args = eval(coupon.arguments) if coupon.arguments is not None else {}
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            updated_cart = rule.execute(cart, coupon_code, args)
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            updated_cart, discounts = rule.execute(cart, coupon_code, args)
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            if discounts and len(discounts) > 0:    user_client.saveDiscounts(discounts)
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            user_client.applyCouponToCart(cart_id, coupon_code, updated_cart.totalPrice, updated_cart.discountedPrice)
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            user_client.applyCouponToCart(cart_id, coupon_code, updated_cart.totalPrice, updated_cart.discountedPrice)
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            return updated_cart
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            return updated_cart
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        except ImportError as e:
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        except ImportError as e:
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            traceback.print_stack()
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            traceback.print_stack()
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            #TODO: Better message
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            #TODO: Better message