372 lines
14 KiB
Python
372 lines
14 KiB
Python
from django.shortcuts import render
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from django.db import transaction
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from django.contrib.auth import get_user_model
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from rest_framework import viewsets, mixins, permissions, status, views
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from rest_framework.renderers import TemplateHTMLRenderer
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from rest_framework.response import Response
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from rest_framework.decorators import action
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from rest_framework.reverse import reverse
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from rest_framework.decorators import renderer_classes
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from vat_validator import validate_vat, vies
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from vat_validator.countries import EU_COUNTRY_CODES
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from hardcopy import bytestring_to_pdf
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from django.core.files.temp import NamedTemporaryFile
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from django.http import FileResponse
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from django.template.loader import render_to_string
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from copy import deepcopy
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import json
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import logging
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from .models import *
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from .serializers import *
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from datetime import datetime
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from vat_validator import sanitize_vat
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import uncloud_pay.stripe as uncloud_stripe
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logger = logging.getLogger(__name__)
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###
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# Payments and Payment Methods.
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class PaymentViewSet(viewsets.ReadOnlyModelViewSet):
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serializer_class = PaymentSerializer
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permission_classes = [permissions.IsAuthenticated]
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def get_queryset(self):
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return Payment.objects.filter(owner=self.request.user)
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class OrderViewSet(viewsets.ReadOnlyModelViewSet):
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serializer_class = OrderSerializer
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permission_classes = [permissions.IsAuthenticated]
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def get_queryset(self):
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return Order.objects.filter(owner=self.request.user)
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class PaymentMethodViewSet(viewsets.ModelViewSet):
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permission_classes = [permissions.IsAuthenticated]
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def get_serializer_class(self):
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if self.action == 'create':
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return CreatePaymentMethodSerializer
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elif self.action == 'update':
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return UpdatePaymentMethodSerializer
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elif self.action == 'charge':
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return ChargePaymentMethodSerializer
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else:
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return PaymentMethodSerializer
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def get_queryset(self):
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return PaymentMethod.objects.filter(owner=self.request.user)
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# XXX: Handling of errors is far from great down there.
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@transaction.atomic
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def create(self, request):
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serializer = self.get_serializer(data=request.data)
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serializer.is_valid(raise_exception=True)
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# Set newly created method as primary if no other method is.
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if PaymentMethod.get_primary_for(request.user) == None:
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serializer.validated_data['primary'] = True
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if serializer.validated_data['source'] == "stripe":
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# Retrieve Stripe customer ID for user.
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customer_id = uncloud_stripe.get_customer_id_for(request.user)
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if customer_id == None:
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return Response(
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{'error': 'Could not resolve customer stripe ID.'},
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status=status.HTTP_500_INTERNAL_SERVER_ERROR)
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try:
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setup_intent = uncloud_stripe.create_setup_intent(customer_id)
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except Exception as e:
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return Response({'error': str(e)},
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status=status.HTTP_500_INTERNAL_SERVER_ERROR)
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payment_method = PaymentMethod.objects.create(
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owner=request.user,
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stripe_setup_intent_id=setup_intent.id,
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**serializer.validated_data)
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# TODO: find a way to use reverse properly:
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# https://www.django-rest-framework.org/api-guide/reverse/
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path = "payment-method/{}/register-stripe-cc".format(
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payment_method.uuid)
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stripe_registration_url = reverse('api-root', request=request) + path
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return Response({'please_visit': stripe_registration_url})
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else:
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serializer.save(owner=request.user, **serializer.validated_data)
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return Response(serializer.data)
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@action(detail=True, methods=['post'])
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def charge(self, request, pk=None):
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payment_method = self.get_object()
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serializer = self.get_serializer(data=request.data)
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serializer.is_valid(raise_exception=True)
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amount = serializer.validated_data['amount']
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try:
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payment = payment_method.charge(amount)
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output_serializer = PaymentSerializer(payment)
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return Response(output_serializer.data)
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except Exception as e:
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return Response({'error': str(e)}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
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@action(detail=True, methods=['get'], url_path='register-stripe-cc', renderer_classes=[TemplateHTMLRenderer])
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def register_stripe_cc(self, request, pk=None):
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payment_method = self.get_object()
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if payment_method.source != 'stripe':
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return Response(
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{'error': 'This is not a Stripe-based payment method.'},
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template_name='error.html.j2')
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if payment_method.active:
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return Response(
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{'error': 'This payment method is already active'},
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template_name='error.html.j2')
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try:
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setup_intent = uncloud_stripe.get_setup_intent(
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payment_method.stripe_setup_intent_id)
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except Exception as e:
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return Response(
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{'error': str(e)},
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template_name='error.html.j2')
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# TODO: find a way to use reverse properly:
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# https://www.django-rest-framework.org/api-guide/reverse/
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callback_path= "payment-method/{}/activate-stripe-cc/".format(
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payment_method.uuid)
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callback = reverse('api-root', request=request) + callback_path
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# Render stripe card registration form.
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template_args = {
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'client_secret': setup_intent.client_secret,
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'stripe_pk': uncloud_stripe.public_api_key,
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'callback': callback
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}
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return Response(template_args, template_name='stripe-payment.html.j2')
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@action(detail=True, methods=['post'], url_path='activate-stripe-cc')
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def activate_stripe_cc(self, request, pk=None):
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payment_method = self.get_object()
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try:
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setup_intent = uncloud_stripe.get_setup_intent(
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payment_method.stripe_setup_intent_id)
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except Exception as e:
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return Response({'error': str(e)}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
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# Card had been registered, fetching payment method.
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print(setup_intent)
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if setup_intent.payment_method:
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payment_method.stripe_payment_method_id = setup_intent.payment_method
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payment_method.save()
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return Response({
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'uuid': payment_method.uuid,
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'activated': payment_method.active})
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else:
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error = 'Could not fetch payment method from stripe. Please try again.'
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return Response({'error': error})
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@action(detail=True, methods=['post'], url_path='set-as-primary')
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def set_as_primary(self, request, pk=None):
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payment_method = self.get_object()
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payment_method.set_as_primary_for(request.user)
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serializer = self.get_serializer(payment_method)
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return Response(serializer.data)
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###
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# Bills and Orders.
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class BillViewSet(viewsets.ReadOnlyModelViewSet):
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serializer_class = BillSerializer
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permission_classes = [permissions.IsAuthenticated]
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def get_queryset(self):
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return Bill.objects.filter(owner=self.request.user)
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@action(detail=False, methods=['get'])
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def unpaid(self, request):
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serializer = self.get_serializer(
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Bill.get_unpaid_for(self.request.user),
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many=True)
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return Response(serializer.data)
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@action(detail=True, methods=['get'])
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def download(self, *args, **kwargs):
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bill = self.get_object()
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output_file = NamedTemporaryFile()
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bill_html = render_to_string("bill.html.j2", {'bill': bill})
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bytestring_to_pdf(bill_html.encode('utf-8'), output_file)
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response = FileResponse(output_file, content_type="application/pdf")
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response['Content-Disposition'] = 'filename="{}_{}.pdf"'.format(
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bill.reference, bill.uuid
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)
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return response
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class OrderViewSet(viewsets.ReadOnlyModelViewSet):
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serializer_class = OrderSerializer
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permission_classes = [permissions.IsAuthenticated]
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def get_queryset(self):
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return Order.objects.filter(owner=self.request.user)
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class BillingAddressViewSet(mixins.CreateModelMixin,
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mixins.RetrieveModelMixin,
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mixins.UpdateModelMixin,
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mixins.ListModelMixin,
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viewsets.GenericViewSet):
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permission_classes = [permissions.IsAuthenticated]
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def get_serializer_class(self):
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if self.action == 'update':
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return UpdateBillingAddressSerializer
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else:
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return BillingAddressSerializer
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def get_queryset(self):
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return self.request.user.billingaddress_set.all()
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def create(self, request):
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serializer = self.get_serializer(data=request.data)
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serializer.is_valid(raise_exception=True)
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# Validate VAT numbers.
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country = serializer.validated_data["country"]
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# We ignore empty VAT numbers.
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if 'vat_number' in serializer.validated_data and serializer.validated_data["vat_number"] != "":
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vat_number = serializer.validated_data["vat_number"]
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if not validate_vat(country, vat_number):
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return Response(
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{'error': 'Malformed VAT number.'},
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status=status.HTTP_400_BAD_REQUEST)
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elif country in EU_COUNTRY_CODES:
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# XXX: make a synchroneous call to a third patry API here might not be a good idea..
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try:
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vies_state = vies.check_vat(country, vat_number)
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if not vies_state.valid:
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return Response(
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{'error': 'European VAT number does not exist in VIES.'},
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status=status.HTTP_400_BAD_REQUEST)
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except Exception as e:
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logger.warning(e)
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return Response(
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{'error': 'Could not validate EU VAT number against VIES. Try again later..'},
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status=status.HTTP_500_INTERNAL_SERVER_ERROR)
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serializer.save(owner=request.user)
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return Response(serializer.data)
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###
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# Admin stuff.
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class AdminPaymentViewSet(viewsets.ModelViewSet):
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serializer_class = PaymentSerializer
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permission_classes = [permissions.IsAdminUser]
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def get_queryset(self):
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return Payment.objects.all()
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def create(self, request):
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serializer = self.get_serializer(data=request.data)
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serializer.is_valid(raise_exception=True)
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serializer.save(timestamp=datetime.now())
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headers = self.get_success_headers(serializer.data)
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return Response(serializer.data, status=status.HTTP_201_CREATED, headers=headers)
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# Bills are generated from orders and should not be created or updated by hand.
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class AdminBillViewSet(BillViewSet):
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serializer_class = BillSerializer
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permission_classes = [permissions.IsAdminUser]
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def get_queryset(self):
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return Bill.objects.all()
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@action(detail=False, methods=['get'])
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def unpaid(self, request):
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unpaid_bills = []
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# XXX: works but we can do better than number of users + 1 SQL requests...
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for user in get_user_model().objects.all():
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unpaid_bills = unpaid_bills + Bill.get_unpaid_for(self.request.user)
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serializer = self.get_serializer(unpaid_bills, many=True)
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return Response(serializer.data)
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@action(detail=False, methods=['post'])
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def generate(self, request):
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users = get_user_model().objects.all()
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generated_bills = []
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for user in users:
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now = timezone.now()
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generated_bills = generated_bills + Bill.generate_for(
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year=now.year,
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month=now.month,
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user=user)
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return Response(
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map(lambda b: b.reference, generated_bills),
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status=status.HTTP_200_OK)
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class AdminOrderViewSet(mixins.ListModelMixin,
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mixins.RetrieveModelMixin,
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mixins.CreateModelMixin,
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mixins.UpdateModelMixin,
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viewsets.GenericViewSet):
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serializer_class = OrderSerializer
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permission_classes = [permissions.IsAdminUser]
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def get_serializer(self, *args, **kwargs):
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return self.serializer_class(*args, **kwargs, admin=True)
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def get_queryset(self):
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return Order.objects.all()
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# Updates create a new order and terminate the 'old' one.
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@transaction.atomic
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def update(self, request, *args, **kwargs):
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order = self.get_object()
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partial = kwargs.pop('partial', False)
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serializer = self.get_serializer(order, data=request.data, partial=partial)
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serializer.is_valid(raise_exception=True)
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# Clone existing order for replacement.
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replacing_order = deepcopy(order)
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# Yes, that's how you make a new entry in DB:
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# https://docs.djangoproject.com/en/3.0/topics/db/queries/#copying-model-instances
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replacing_order.pk = None
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for attr, value in serializer.validated_data.items():
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setattr(replacing_order, attr, value)
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# Save replacing order and terminate 'previous' one.
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replacing_order.save()
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order.replaced_by = replacing_order
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order.save()
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order.terminate()
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return Response(replacing_order)
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@action(detail=True, methods=['post'])
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def terminate(self, request, pk):
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order = self.get_object()
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if order.is_terminated:
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return Response(
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{'error': 'Order is already terminated.'},
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status=status.HTTP_500_INTERNAL_SERVER_ERROR)
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else:
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order.terminate()
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return Response({}, status=status.HTTP_200_OK)
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