django-orchestra/orchestra/apps/orders/backends.py

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2014-09-03 13:56:02 +00:00
import datetime
from orchestra.apps.bills.models import Invoice, Fee, BillLine, BillSubline
class BillsBackend(object):
def create_bills(self, account, lines):
invoice = None
fees = []
for order, nominal_price, size, ini, end, discounts in lines:
service = order.service
if service.is_fee:
fee = Fee.objects.get_or_create(account=account, status=Fee.OPEN)
line = fee.lines.create(rate=service.nominal_price, amount=size,
total=nominal_price, tax=0)
self.create_sublines(line, discounts)
fees.append(fee)
else:
if invoice is None:
invoice, __ = Invoice.objects.get_or_create(account=account,
status=Invoice.OPEN)
description = order.description
if service.billing_period != service.NEVER:
description += " {ini} to {end}".format(
ini=ini.strftime("%b, %Y"),
end=(end-datetime.timedelta(seconds=1)).strftime("%b, %Y"))
line = invoice.lines.create(
description=description,
rate=service.nominal_price,
amount=size,
total=nominal_price,
tax=service.tax,
)
self.create_sublines(line, discounts)
return [invoice] + fees
def create_sublines(self, line, discounts):
for name, value in discounts:
line.sublines.create(
description=_("Discount per %s") % name,
total=value,
)