django-orchestra-test/orchestra/contrib/orders/billing.py

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from django.utils.translation import ugettext_lazy as _
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from orchestra.contrib.bills.models import Invoice, Fee, ProForma
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class BillsBackend(object):
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def create_bills(self, account, lines, **options):
bill = None
ant_bill = None
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bills = []
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create_new = options.get('new_open', False)
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proforma = options.get('proforma', False)
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for line in lines:
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quantity = line.metric*line.size
if quantity == 0:
continue
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service = line.order.service
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# Create bill if needed
if proforma:
if ant_bill is None:
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if create_new:
bill = ProForma.objects.create(account=account)
else:
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bill = ProForma.objects.filter(account=account, is_open=True).last()
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if bill:
bill.updated()
else:
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bill = ProForma.objects.create(account=account, is_open=True)
bills.append(bill)
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else:
bill = ant_bill
ant_bill = bill
elif service.is_fee:
bill = Fee.objects.create(account=account)
bills.append(bill)
else:
if ant_bill is None:
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if create_new:
bill = Invoice.objects.create(account=account)
else:
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bill = Invoice.objects.filter(account=account, is_open=True).last()
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if bill:
bill.updated()
else:
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bill = Invoice.objects.create(account=account, is_open=True)
bills.append(bill)
else:
bill = ant_bill
ant_bill = bill
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# Create bill line
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billine = bill.lines.create(
rate=service.nominal_price,
quantity=line.metric*line.size,
verbose_quantity=self.get_verbose_quantity(line),
subtotal=line.subtotal,
tax=service.tax,
description=self.get_line_description(line),
start_on=line.ini,
end_on=line.end if service.billing_period != service.NEVER else None,
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)
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return bills
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# 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)
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def get_line_description(self, line):
service = line.order.service
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description = line.order.description
return description
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def get_verbose_quantity(self, line):
metric = format(line.metric, '.2f').rstrip('0').rstrip('.')
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metric = metric.strip('0').strip('.')
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size = format(line.size, '.2f').rstrip('0').rstrip('.')
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size = size.strip('0').strip('.')
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if metric == '1':
return size
if size == '1':
return metric
return "%s×%s" % (metric, size)
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def create_sublines(self, line, discounts):
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for discount in discounts:
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line.sublines.create(
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description=_("Discount per %s") % discount.type.lower(),
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total=discount.total,
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type=discount.type,
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)