223 lines
8.3 KiB
Python
223 lines
8.3 KiB
Python
import decimal
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import logging
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import sys
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from django.db import models
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from django.db.migrations.recorder import MigrationRecorder
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from django.db.models import F, Q
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from django.db.models.loading import get_model
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from django.db.models.signals import pre_delete, post_delete, post_save
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from django.dispatch import receiver
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from django.contrib.admin.models import LogEntry
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from django.contrib.contenttypes import generic
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from django.contrib.contenttypes.models import ContentType
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from django.utils import timezone
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from django.utils.functional import cached_property
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from django.utils.translation import ugettext_lazy as _
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from orchestra.core import caches, services, accounts
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from orchestra.models import queryset
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from orchestra.utils.apps import autodiscover
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from orchestra.utils.python import import_class
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from . import helpers, settings
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from .handlers import ServiceHandler
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logger = logging.getLogger(__name__)
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class OrderQuerySet(models.QuerySet):
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group_by = queryset.group_by
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def bill(self, **options):
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# TODO classmethod?
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bills = []
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bill_backend = Order.get_bill_backend()
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qs = self.select_related('account', 'service')
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commit = options.get('commit', True)
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for account, services in qs.group_by('account', 'service').iteritems():
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bill_lines = []
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for service, orders in services.iteritems():
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lines = service.handler.generate_bill_lines(orders, account, **options)
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bill_lines.extend(lines)
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if commit:
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bills += bill_backend.create_bills(account, bill_lines, **options)
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else:
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bills += [(account, bill_lines)]
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return bills
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def givers(self, ini, end):
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return self.cancelled_and_billed().filter(billed_until__gt=ini, registered_on__lt=end)
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def cancelled_and_billed(self, exclude=False):
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qs = dict(cancelled_on__isnull=False, billed_until__isnull=False,
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cancelled_on__lte=F('billed_until'))
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if exclude:
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return self.exclude(**qs)
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return self.filter(**qs)
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def pricing_orders(self, ini, end):
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return self.filter(billed_until__isnull=False, billed_until__gt=ini,
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registered_on__lt=end)
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def by_object(self, obj, **kwargs):
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ct = ContentType.objects.get_for_model(obj)
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return self.filter(object_id=obj.pk, content_type=ct, **kwargs)
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def active(self, **kwargs):
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""" return active orders """
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return self.filter(
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Q(cancelled_on__isnull=True) | Q(cancelled_on__gt=timezone.now())
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).filter(**kwargs)
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def inactive(self, **kwargs):
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""" return inactive orders """
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return self.filter(cancelled_on__lt=timezone.now(), **kwargs)
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class Order(models.Model):
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account = models.ForeignKey('accounts.Account', verbose_name=_("account"),
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related_name='orders')
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content_type = models.ForeignKey(ContentType)
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object_id = models.PositiveIntegerField(null=True)
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service = models.ForeignKey(settings.ORDERS_SERVICE_MODEL,
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verbose_name=_("service"), related_name='orders')
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registered_on = models.DateField(_("registered"), auto_now_add=True) # TODO datetime field?
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cancelled_on = models.DateField(_("cancelled"), null=True, blank=True)
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billed_on = models.DateField(_("billed on"), null=True, blank=True)
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billed_until = models.DateField(_("billed until"), null=True, blank=True)
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ignore = models.BooleanField(_("ignore"), default=False)
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description = models.TextField(_("description"), blank=True)
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content_object = generic.GenericForeignKey()
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objects = OrderQuerySet.as_manager()
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def __unicode__(self):
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return str(self.service)
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@classmethod
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def update_orders(cls, instance):
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Service = get_model(*settings.ORDERS_SERVICE_MODEL.split('.'))
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for service in Service.get_services(instance):
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orders = Order.objects.by_object(instance, service=service).active()
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if service.handler.matches(instance):
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if not orders:
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account_id = getattr(instance, 'account_id', instance.pk)
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if account_id is None:
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# New account workaround -> user.account_id == None
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continue
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order = cls.objects.create(content_object=instance,
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service=service, account_id=account_id)
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logger.info("CREATED new order id: {id}".format(id=order.id))
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else:
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order = orders.get()
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order.update()
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elif orders:
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orders.get().cancel()
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@classmethod
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def get_bill_backend(cls):
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return import_class(settings.ORDERS_BILLING_BACKEND)()
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def update(self):
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instance = self.content_object
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handler = self.service.handler
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metric = ''
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if handler.metric:
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metric = handler.get_metric(instance)
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if metric is not None:
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MetricStorage.store(self, metric)
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metric = ', metric:{}'.format(metric)
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description = "{}: {}".format(handler.description, str(instance))
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logger.info("UPDATED order id:{id}, description:{description}{metric}".format(
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id=self.id, description=description, metric=metric))
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if self.description != description:
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self.description = description
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self.save()
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def cancel(self):
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self.cancelled_on = timezone.now()
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self.save()
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logger.info("CANCELLED order id: {id}".format(id=self.id))
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def get_metric(self, ini, end, changes=False):
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if changes:
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result = []
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prev = None
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for metric in self.metrics.filter(created_on__lt=end).order_by('created_on'):
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created = metric.created_on.date()
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if created > ini:
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cini = prev.created_on.date()
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if not result:
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cini = ini
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result.append((cini, created, prev.value))
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prev = metric
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if created < end:
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result.append((created, end, metric.value))
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return result
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try:
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metrics = self.metrics.filter(updated_on__lt=end, updated_on__gte=ini)
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return metrics.latest('updated_on').value
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except MetricStorage.DoesNotExist:
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return decimal.Decimal(0)
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class MetricStorage(models.Model):
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order = models.ForeignKey(Order, verbose_name=_("order"), related_name='metrics')
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value = models.DecimalField(_("value"), max_digits=16, decimal_places=2)
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created_on = models.DateTimeField(_("created"), auto_now_add=True)
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updated_on = models.DateTimeField(_("updated"))
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class Meta:
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get_latest_by = 'created_on'
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def __unicode__(self):
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return unicode(self.order)
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@classmethod
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def store(cls, order, value):
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now = timezone.now()
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try:
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metric = cls.objects.filter(order=order).latest()
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except cls.DoesNotExist:
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cls.objects.create(order=order, value=value, updated_on=now)
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else:
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if metric.value != value:
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cls.objects.create(order=order, value=value, updated_on=now)
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else:
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metric.updated_on = now
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metric.save()
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_excluded_models = (MetricStorage, LogEntry, Order, ContentType, MigrationRecorder.Migration)
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@receiver(post_delete, dispatch_uid="orders.cancel_orders")
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def cancel_orders(sender, **kwargs):
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if sender not in _excluded_models:
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instance = kwargs['instance']
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if hasattr(instance, 'account'):
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for order in Order.objects.by_object(instance).active():
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order.cancel()
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else:
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related = helpers.get_related_objects(instance)
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if related and related != instance:
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Order.update_orders(related)
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@receiver(post_save, dispatch_uid="orders.update_orders")
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def update_orders(sender, **kwargs):
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if sender not in _excluded_models:
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instance = kwargs['instance']
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if hasattr(instance, 'account'):
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Order.update_orders(instance)
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else:
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related = helpers.get_related_objects(instance)
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if related and related != instance:
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Order.update_orders(related)
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accounts.register(Order)
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