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from django.conf import settings
from django.db import transaction
from django.utils import timezone
from datetime import timedelta
from decimal import Decimal
from postgresqleu.mailqueue.util import send_simple_mail
from postgresqleu.invoices.util import InvoiceManager
from postgresqleu.invoices.models import Invoice
from postgresqleu.util.currency import format_currency
from .api import TrustlyWrapper, TrustlyException
from .models import TrustlyTransaction, TrustlyLog
from .models import TrustlyNotification
# Django intgrated wrapper for the trustly API
class Trustly(TrustlyWrapper):
def __init__(self, pm):
self.pm = pm
super(Trustly, self).__init__(pm.get_apibase(),
pm.config('user'),
pm.config('password'),
pm.config('private_key'),
pm.config('public_key'),
'{0}/trustly_notification/{1}/'.format(settings.SITEBASE, pm.id),
settings.CURRENCY_ABBREV,
pm.config('hold_notifications', False),
)
def process_raw_trustly_notification(self, raw):
(uuid, method, data) = self.parse_notification(raw.contents)
if not data:
TrustlyLog(message="Failed to parse trustly raw notification {0}".format(raw.id),
error=True,
paymentmethod=raw.paymentmethod).save()
return (False, uuid, method)
n = None
with transaction.atomic():
# Find if we have already seen this guy
try:
TrustlyNotification.objects.get(notificationid=data['notificationid'])
# If it's found, then we're happy, so keep on smiling. Flag this one as
# confirmed as well.
raw.confirmed = True
raw.save()
return (True, uuid, method)
except TrustlyNotification.DoesNotExist:
pass
n = TrustlyNotification(
receivedat=timezone.now(),
rawnotification=raw,
method=method,
notificationid=data['notificationid'],
orderid=data['orderid'],
amount='amount' in data and Decimal(data['amount']) or None,
messageid=data['messageid'],
)
n.save()
raw.confirmed = True
raw.save()
# Raw is confirmed, but parsed one is still pending. So handle that one.
try:
self.process_notification(n)
except Exception as e:
self.log_and_email("Exception processing notification {0}: {1}".format(n.id, e), raw.paymentmethod)
# If we somehow failed to handle at this level, we still flag things as ok to
# Trustly, and deal with it ourselves.
# Notifications can always be re-parsed
return (True, uuid, method)
def log_and_email(self, message, paymentmethod):
TrustlyLog(message=message, error=True, paymentmethod=paymentmethod).save()
send_simple_mail(settings.INVOICE_SENDER_EMAIL,
self.pm.config('notification_receiver'),
"Trustly payment error",
"A trustly payment for {0} failed with the error:\n\n{1}".format(paymentmethod.internaldescription, message),
)
@transaction.atomic
def process_notification(self, notification):
method = notification.rawnotification.paymentmethod
if notification.method in ('pending', 'credit'):
# Find the appropriate transaction
try:
trans = TrustlyTransaction.objects.get(orderid=notification.orderid, paymentmethod=method)
except TrustlyTransaction.DoesNotExist:
self.log_and_email("Transaction {0} for notification {1} not found!".format(notification.orderid, notification.id), method)
return False
if trans.amount != notification.amount:
self.log_and_email("Notification {0} for transaction {1} has invalid amount ({2} should be {3})!".format(notification.id, notification.orderid, notification.amount, trans.amount), method)
return False
if notification.method == 'pending':
# Pending is just an incremental state, so we collect it but don't do anything with
# it.
if not trans.pendingat:
trans.pendingat = timezone.now()
trans.save()
try:
self.process_pending_payment(trans)
except TrustlyException as e:
self.log_and_email(e, method)
return False
notification.confirmed = True
notification.save()
TrustlyLog(message="Pending payment for Trustly id {0} (order {1}) received".format(trans.id, trans.orderid), paymentmethod=method).save()
return True
else:
# Credit! The payment is completed!
if not trans.pendingat:
# We set pending in case it never showed up
trans.pendingat = timezone.now()
if trans.completedat:
self.log_and_email("Duplicate completed notification ({0}) received for transaction {1}!".format(notification.id, notification.orderid), method)
return False
trans.completedat = timezone.now()
try:
self.process_completed_payment(trans)
except TrustlyException as e:
self.log_and_email(e, method)
return False
trans.save()
notification.confirmed = True
notification.save()
return True
elif notification.method == 'cancel':
try:
trans = TrustlyTransaction.objects.get(orderid=notification.orderid, paymentmethod=method)
if trans.pendingat:
self.log_and_email("Transaction {0} canceled by notification {1} but already in progress. Ignoring cancel!".format(notification.orderid, notification.id), method)
return False
TrustlyLog(message='Transaction {0} canceled from notification'.format(notification.orderid), paymentmethod=method).save()
trans.delete()
except TrustlyTransaction.DoesNotExist:
TrustlyLog("Abandoned transaction {0} canceled from notification".format(notification.orderid), paymentmethod=method)
notification.confirmed = True
notification.save()
return True
else:
self.log_and_email("Unknown notification type '{0}' in notification {1}".format(notification.method, notification.id), method)
return False
# Can't reach here
return False
def get_invoice_for_transaction(self, trans):
try:
return Invoice.objects.get(pk=trans.invoiceid)
except Invoice.DoesNotExist:
raise TrustlyException("Received Trustly notification for non-existing invoice id {0}".format(trans.invoiceid))
def process_pending_payment(self, trans):
# If we have received a 'pending' notification, postpone the invoice to ensure it's valid
# for another 2 hours, in case the credit notification is slightly delayed.
# A cronjob will run every hour to potentially further extend this.
manager = InvoiceManager()
invoice = self.get_invoice_for_transaction(trans)
# Postpone the invoice so it's valid for at least another 2 hours.
r = manager.postpone_invoice_autocancel(invoice,
timedelta(hours=2),
reason="Trustly pending arrived, awaiting credit",
silent=True)
if r:
TrustlyLog(message="Extended autocancel time for invoice {0} to ensure time for credit notification".format(invoice.id),
paymentmethod=trans.paymentmethod).save()
def process_completed_payment(self, trans):
manager = InvoiceManager()
invoice = self.get_invoice_for_transaction(trans)
def invoice_logger(msg):
raise TrustlyException("Trustly invoice processing failed: {0}".format(msg))
method = trans.paymentmethod
pm = method.get_implementation()
manager.process_incoming_payment_for_invoice(invoice,
trans.amount,
'Trustly id {0}'.format(trans.id),
0, # XXX: we pay zero now, but should perhaps support fees?
pm.config('accounting_income'),
pm.config('accounting_fee'),
[],
invoice_logger,
method)
TrustlyLog(message="Completed payment for Trustly id {0} (order {1}), {2}, invoice {3}".format(trans.id, trans.orderid, format_currency(trans.amount), invoice.id), paymentmethod=method).save()
send_simple_mail(settings.INVOICE_SENDER_EMAIL,
pm.config('notification_receiver'),
"Trustly payment completed",
"A Trustly payment for {0} of {1} for invoice {2} was completed on the Trustly platform.\n\nInvoice: {3}\nRecipient name: {4}\nRecipient email: {5}\n".format(
method.internaldescription,
format_currency(trans.amount),
invoice.id,
invoice.title,
invoice.recipient_name,
invoice.recipient_email),
)
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