279 lines
11 KiB
Python
279 lines
11 KiB
Python
import datetime
|
|
import decimal
|
|
import logging
|
|
|
|
from django.db import models
|
|
from django.db.models import F, Q, Sum
|
|
from django.apps import apps
|
|
from django.contrib.contenttypes.fields import GenericForeignKey
|
|
from django.contrib.contenttypes.models import ContentType
|
|
from django.utils import timezone
|
|
from django.utils.translation import ugettext_lazy as _
|
|
|
|
from orchestra.models import queryset
|
|
from orchestra.utils.python import import_class
|
|
|
|
from . import settings
|
|
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
class OrderQuerySet(models.QuerySet):
|
|
group_by = queryset.group_by
|
|
|
|
def bill(self, **options):
|
|
bills = []
|
|
bill_backend = Order.get_bill_backend()
|
|
qs = self.select_related('account', 'service')
|
|
commit = options.get('commit', True)
|
|
for account, services in qs.group_by('account', 'service').items():
|
|
bill_lines = []
|
|
for service, orders in services.items():
|
|
for order in orders:
|
|
# Saved for undoing support
|
|
order.old_billed_on = order.billed_on
|
|
order.old_billed_until = order.billed_until
|
|
lines = service.handler.generate_bill_lines(orders, account, **options)
|
|
bill_lines.extend(lines)
|
|
# TODO make this consistent always returning the same fucking types
|
|
if commit:
|
|
bills += bill_backend.create_bills(account, bill_lines, **options)
|
|
else:
|
|
bills += [(account, bill_lines)]
|
|
# TODO remove if commit and always return unique elemenets (set()) when the other todo is fixed
|
|
if commit:
|
|
return list(set(bills))
|
|
return bills
|
|
|
|
def givers(self, ini, end):
|
|
return self.cancelled_and_billed().filter(billed_until__gt=ini, registered_on__lt=end)
|
|
|
|
def cancelled_and_billed(self, exclude=False):
|
|
qs = dict(cancelled_on__isnull=False, billed_until__isnull=False,
|
|
cancelled_on__lte=F('billed_until'))
|
|
if exclude:
|
|
return self.exclude(**qs)
|
|
return self.filter(**qs)
|
|
|
|
def get_related(self, **options):
|
|
""" returns related orders that could have a pricing effect """
|
|
Service = apps.get_model(settings.ORDERS_SERVICE_MODEL)
|
|
conflictive = self.filter(service__metric='')
|
|
conflictive = conflictive.exclude(service__billing_period=Service.NEVER)
|
|
# Exclude rates null or all rates with quantity 0
|
|
conflictive = conflictive.annotate(quantity_sum=Sum('service__rates__quantity')).exclude(quantity_sum=0)
|
|
conflictive = conflictive.select_related('service').distinct().group_by('account_id', 'service')
|
|
qs = Q()
|
|
for account_id, services in conflictive.items():
|
|
for service, orders in services.items():
|
|
ini = datetime.date.max
|
|
end = datetime.date.min
|
|
bp = None
|
|
for order in orders:
|
|
bp = service.handler.get_billing_point(order, **options)
|
|
end = max(end, bp)
|
|
ini = min(ini, order.billed_until or order.registered_on)
|
|
qs |= Q(
|
|
Q(service=service, account=account_id, registered_on__lt=end) & Q(
|
|
Q(billed_until__isnull=True) | Q(billed_until__lt=end)
|
|
) & Q(
|
|
Q(cancelled_on__isnull=True) | Q(cancelled_on__gt=ini)
|
|
)
|
|
)
|
|
if not qs:
|
|
return self.model.objects.none()
|
|
ids = self.values_list('id', flat=True)
|
|
return self.model.objects.filter(qs).exclude(id__in=ids)
|
|
|
|
def pricing_orders(self, ini, end):
|
|
return self.filter(billed_until__isnull=False, billed_until__gt=ini,
|
|
registered_on__lt=end)
|
|
|
|
def by_object(self, obj, **kwargs):
|
|
ct = ContentType.objects.get_for_model(obj)
|
|
return self.filter(object_id=obj.pk, content_type=ct, **kwargs)
|
|
|
|
def active(self, **kwargs):
|
|
""" return active orders """
|
|
return self.filter(
|
|
Q(cancelled_on__isnull=True) | Q(cancelled_on__gt=timezone.now())
|
|
).filter(**kwargs)
|
|
|
|
def inactive(self, **kwargs):
|
|
""" return inactive orders """
|
|
return self.filter(cancelled_on__lte=timezone.now(), **kwargs)
|
|
|
|
|
|
class Order(models.Model):
|
|
account = models.ForeignKey('accounts.Account', verbose_name=_("account"),
|
|
related_name='orders')
|
|
content_type = models.ForeignKey(ContentType)
|
|
object_id = models.PositiveIntegerField(null=True)
|
|
service = models.ForeignKey(settings.ORDERS_SERVICE_MODEL, verbose_name=_("service"),
|
|
related_name='orders')
|
|
registered_on = models.DateField(_("registered"), default=timezone.now, db_index=True)
|
|
cancelled_on = models.DateField(_("cancelled"), null=True, blank=True)
|
|
billed_on = models.DateField(_("billed"), null=True, blank=True)
|
|
billed_until = models.DateField(_("billed until"), null=True, blank=True)
|
|
ignore = models.BooleanField(_("ignore"), default=False)
|
|
description = models.TextField(_("description"), blank=True)
|
|
|
|
content_object = GenericForeignKey()
|
|
objects = OrderQuerySet.as_manager()
|
|
|
|
class Meta:
|
|
get_latest_by = 'id'
|
|
|
|
def __str__(self):
|
|
return str(self.service)
|
|
|
|
@classmethod
|
|
def update_orders(cls, instance, service=None, commit=True):
|
|
updates = []
|
|
if service is None:
|
|
Service = apps.get_model(settings.ORDERS_SERVICE_MODEL)
|
|
services = Service.get_services(instance)
|
|
else:
|
|
services = [service]
|
|
for service in services:
|
|
orders = Order.objects.by_object(instance, service=service).select_related('service').active()
|
|
if service.handler.matches(instance):
|
|
if not orders:
|
|
account_id = getattr(instance, 'account_id', instance.pk)
|
|
if account_id is None:
|
|
# New account workaround -> user.account_id == None
|
|
continue
|
|
ignore = service.handler.get_ignore(instance)
|
|
order = cls(content_object=instance, service=service,
|
|
account_id=account_id, ignore=ignore)
|
|
if commit:
|
|
order.save()
|
|
updates.append((order, 'created'))
|
|
logger.info("CREATED new order id: {id}".format(id=order.id))
|
|
else:
|
|
if len(orders) > 1:
|
|
raise ValueError("A single active order was expected.")
|
|
order = orders[0]
|
|
updates.append((order, 'updated'))
|
|
if commit:
|
|
order.update()
|
|
elif orders:
|
|
if len(orders) > 1:
|
|
raise ValueError("A single active order was expected.")
|
|
order = orders[0]
|
|
order.cancel(commit=commit)
|
|
logger.info("CANCELLED order id: {id}".format(id=order.id))
|
|
updates.append((order, 'cancelled'))
|
|
return updates
|
|
|
|
@classmethod
|
|
def get_bill_backend(cls):
|
|
return import_class(settings.ORDERS_BILLING_BACKEND)()
|
|
|
|
def update(self):
|
|
instance = self.content_object
|
|
if instance is None:
|
|
return
|
|
handler = self.service.handler
|
|
metric = ''
|
|
if handler.metric:
|
|
metric = handler.get_metric(instance)
|
|
if metric is not None:
|
|
MetricStorage.store(self, metric)
|
|
metric = ', metric:{}'.format(metric)
|
|
description = handler.get_order_description(instance)
|
|
logger.info("UPDATED order id:{id}, description:{description}{metric}".format(
|
|
id=self.id, description=description, metric=metric).encode('ascii', 'replace')
|
|
)
|
|
if self.description != description:
|
|
self.description = description
|
|
self.save(update_fields=['description'])
|
|
|
|
def cancel(self, commit=True):
|
|
self.cancelled_on = timezone.now()
|
|
self.ignore = self.service.handler.get_order_ignore(self)
|
|
if commit:
|
|
self.save(update_fields=['cancelled_on', 'ignore'])
|
|
logger.info("CANCELLED order id: {id}".format(id=self.id))
|
|
|
|
def mark_as_ignored(self):
|
|
self.ignore = True
|
|
self.save(update_fields=['ignore'])
|
|
|
|
def mark_as_not_ignored(self):
|
|
self.ignore = False
|
|
self.save(update_fields=['ignore'])
|
|
|
|
def get_metric(self, *args, **kwargs):
|
|
if kwargs.pop('changes', False):
|
|
ini, end = args
|
|
result = []
|
|
prev = None
|
|
for metric in self.metrics.filter(created_on__lt=end).order_by('id'):
|
|
created = metric.created_on
|
|
if created > ini:
|
|
cini = prev.created_on
|
|
if not result:
|
|
cini = ini
|
|
result.append((cini, created, prev.value))
|
|
prev = metric
|
|
if created < end:
|
|
result.append((created, end, metric.value))
|
|
return result
|
|
if kwargs:
|
|
raise AttributeError
|
|
if len(args) == 2:
|
|
ini, end = args
|
|
metrics = self.metrics.filter(updated_on__lt=end, updated_on__gte=ini)
|
|
elif len(args) == 1:
|
|
date = args[0]
|
|
date = datetime.date(year=date.year, month=date.month, day=date.day)
|
|
date += datetime.timedelta(days=1)
|
|
metrics = self.metrics.filter(updated_on__lt=date)
|
|
elif not args:
|
|
return self.metrics.latest('updated_on').value
|
|
else:
|
|
raise AttributeError
|
|
try:
|
|
return metrics.latest('updated_on').value
|
|
except MetricStorage.DoesNotExist:
|
|
return decimal.Decimal(0)
|
|
|
|
|
|
class MetricStorage(models.Model):
|
|
""" Stores metric state for future billing """
|
|
order = models.ForeignKey(Order, verbose_name=_("order"), related_name='metrics')
|
|
value = models.DecimalField(_("value"), max_digits=16, decimal_places=2)
|
|
created_on = models.DateField(_("created"), auto_now_add=True)
|
|
# default=lambda: timezone.now())
|
|
# TODO time field?
|
|
updated_on = models.DateTimeField(_("updated"))
|
|
|
|
class Meta:
|
|
get_latest_by = 'id'
|
|
|
|
def __str__(self):
|
|
return str(self.order)
|
|
|
|
@classmethod
|
|
def store(cls, order, value):
|
|
now = timezone.now()
|
|
try:
|
|
last = cls.objects.filter(order=order).latest()
|
|
except cls.DoesNotExist:
|
|
cls.objects.create(order=order, value=value, updated_on=now)
|
|
else:
|
|
# Metric storage has per-day granularity (last value of the day is what counts)
|
|
if last.created_on == now.date():
|
|
last.value = value
|
|
last.updated_on = now
|
|
last.save()
|
|
else:
|
|
error = decimal.Decimal(str(settings.ORDERS_METRIC_ERROR))
|
|
if value > last.value+error or value < last.value-error:
|
|
cls.objects.create(order=order, value=value, updated_on=now)
|
|
else:
|
|
last.updated_on = now
|
|
last.save(update_fields=['updated_on'])
|