Adds donation calculator.

This commit is contained in:
Christopher Neugebauer 2017-10-05 13:06:28 -07:00
parent 868ef33e74
commit 3053a9bfb2
2 changed files with 44 additions and 0 deletions

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from registrasion.models import commerce
from registrasion.controllers.category import CategoryController
from registrasion.controllers.item import ItemController
from decimal import Decimal
from django import template
from django.conf import settings
from django.db.models import Sum
from urllib import urlencode # TODO: s/urllib/six.moves.urllib/
register = template.Library()
@register.simple_tag(takes_context=True)
def donation_income(context, invoice):
''' Calculates the donation income for a given invoice.
Returns:
the donation income.
'''
# 15% (FSA) goes to Conservancy; 85% is real goods
fsa_rate = Decimal("0.85")
rbi_full_ticket = Decimal("68.00")
rbi_early_bird_discount = Decimal("-21.35")
rbi = []
for line in invoice.lineitem_set.all():
if line.product.category.name == "Ticket":
if line.product.name.startswith("Unaffiliated Individual"):
# Includes full price & discounts
rbi.append(line.total_price * fsa_rate)
else:
if line.total_price > 0:
rbi.append(rbi_full_ticket)
elif line.total_price < 0:
rbi.append(rbi_early_bird_discount)
elif line.product.category.name == "T-Shirt":
rbi.append(line.total_price * fsa_rate)
donation = (invoice.value - sum(rbi))
return donation.quantize(Decimal('.01'))