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

77 lines
3.1 KiB
Python

import datetime
from django.utils.translation import ugettext_lazy as _
from orchestra.apps.bills.models import Invoice, Fee, ProForma
class BillsBackend(object):
def create_bills(self, account, lines, **options):
bill = None
bills = []
create_new = options.get('new_open', False)
proforma = options.get('proforma', False)
for line in lines:
service = line.order.service
# Create bill if needed
if bill is None or service.is_fee:
if proforma:
if create_new:
bill = ProForma.objects.create(account=account)
else:
bill = ProForma.objects.filter(account=account, is_open=True).last()
if not bill:
bill = ProForma.objects.create(account=account, is_open=True)
elif service.is_fee:
bill = Fee.objects.create(account=account)
else:
if create_new:
bill = Invoice.objects.create(account=account)
else:
bill = Invoice.objects.filter(account=account, is_open=True).last()
if not bill:
bill = Invoice.objects.create(account=account, is_open=True)
bills.append(bill)
# Create bill line
billine = bill.lines.create(
rate=service.nominal_price,
quantity=line.metric*line.size,
subtotal=line.subtotal,
tax=service.tax,
description=self.get_line_description(line),
order=line.order,
order_billed_on=line.order.old_billed_on,
order_billed_until=line.order.old_billed_until
)
self.create_sublines(billine, line.discounts)
return bills
def format_period(self, ini, end):
ini = ini.strftime("%b, %Y")
end = (end-datetime.timedelta(seconds=1)).strftime("%b, %Y")
if ini == end:
return ini
return _("{ini} to {end}").format(ini=ini, end=end)
def get_line_description(self, line):
service = line.order.service
if service.is_fee:
return self.format_period(line.ini, line.end)
description = line.order.description
if service.billing_period != service.NEVER:
description += " %s" % self.format_period(line.ini, line.end)
if service.metric and service.billing_period != service.NEVER and service.pricing_period == service.NEVER:
metric = format(line.metric, '.2f').rstrip('0').rstrip('.')
size = format(line.size, '.2f').rstrip('0').rstrip('.')
description += " (%s*%s)" % (metric, size)
return description
def create_sublines(self, line, discounts):
for discount in discounts:
line.sublines.create(
description=_("Discount per %s") % discount.type.lower(),
total=discount.total,
type=discount.type,
)