def get_voucher_discount_info(benefit, price):
"""
Get discount info that will describe the effect that benefit has on product price.
Args:
benefit (Benefit): Benefit provided by an applied voucher.
price (Decimal): Product price.
Returns:
dict
"""
if benefit and price > 0:
benefit_value = float(benefit.value)
price = float(price)
if benefit.type == Benefit.PERCENTAGE:
return {
'discount_percentage':
benefit_value,
'discount_value':
get_discount_value(discount_percentage=benefit_value,
product_price=price),
'is_discounted':
True if benefit.value < 100 else False
}
else:
discount_percentage = get_discount_percentage(
discount_value=benefit_value, product_price=price)
if discount_percentage > 100:
discount_percentage = 100.00
discount_value = price
else:
discount_percentage = discount_percentage
discount_value = benefit_value
return {
'discount_percentage': discount_percentage,
'discount_value': float(discount_value),
'is_discounted': True if discount_percentage < 100 else False,
}
else:
return {
'discount_percentage': 0.00,
'discount_value': 0.00,
'is_discounted': False
}
def _get_basket_discount_value(basket, offer):
"""Calculate the discount value based on benefit type and value"""
sum_basket_lines = basket.all_lines().aggregate(
total=Sum('stockrecord__price_excl_tax'))['total'] or Decimal(0.0)
# calculate discount value that will be covered by the offer
benefit_type = get_benefit_type(offer.benefit)
benefit_value = offer.benefit.value
if benefit_type == Benefit.PERCENTAGE:
discount_value = get_discount_value(float(offer.benefit.value),
float(sum_basket_lines))
discount_value = Decimal(discount_value)
else: # Benefit.FIXED
# There is a possibility that the discount value could be greater than the sum of basket lines
# ie, discount value is $100, basket lines are $75, in this case the full price of the basket lines
# will be covered and learner will owe $0 to checkout.
if benefit_value > sum_basket_lines:
discount_value = sum_basket_lines
else:
discount_value = benefit_value
return discount_value
def _get_course_discount_value(basket, offer):
"""Calculate the discount value based on benefit type and value"""
product = basket.lines.first().product
seat = product.course.seat_products.get(id=product.id)
stock_record = StockRecord.objects.get(product=seat,
partner=product.course.partner)
course_price = stock_record.price_excl_tax
# calculate discount value that will be covered by the offer
benefit_type = get_benefit_type(offer.benefit)
benefit_value = offer.benefit.value
if benefit_type == Benefit.PERCENTAGE:
discount_value = get_discount_value(float(offer.benefit.value),
float(course_price))
discount_value = Decimal(discount_value)
else: # Benefit.FIXED
# There is a possibility that the discount value could be greater than the course price
# ie, discount value is $100, course price is $75, in this case the full price of the course will be covered
# and learner will owe $0 to checkout.
if benefit_value > course_price:
discount_value = course_price
else:
discount_value = benefit_value
return discount_value