amal
b7aa1c6971
- Implement a complete cycle for buying a Matrix Chat Host - Refactor the Payement cycle and stripe related methods
310 lines
10 KiB
Python
310 lines
10 KiB
Python
from django.contrib.auth.mixins import LoginRequiredMixin
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from django.views.generic.base import TemplateView
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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 .selectors 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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from django.contrib.auth.decorators import login_required
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from django.utils.decorators import method_decorator
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from django.http import JsonResponse
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import stripe
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logger = logging.getLogger(__name__)
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###
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# 2020-12 checked code
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class RegisterCard(TemplateView):
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template_name = "uncloud_pay/register_stripe.html"
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@method_decorator(login_required)
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def dispatch(self, *args, **kwargs):
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return super().dispatch(*args, **kwargs)
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def get_context_data(self, **kwargs):
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customer_id = uncloud_stripe.get_customer_id_for(self.request.user)
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setup_intent = uncloud_stripe.create_setup_intent(customer_id)
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context = super().get_context_data(**kwargs)
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context['client_secret'] = setup_intent.client_secret
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context['username'] = self.request.user.username
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context['stripe_pk'] = uncloud_stripe.public_api_key
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return context
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class CreditCardViewSet(mixins.RetrieveModelMixin,
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mixins.UpdateModelMixin,
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mixins.DestroyModelMixin,
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mixins.ListModelMixin,
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viewsets.GenericViewSet):
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serializer_class = StripeCreditCardSerializer
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permission_classes = [permissions.IsAuthenticated]
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def list(self, request):
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uncloud_stripe.sync_cards_for_user(self.request.user)
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return super().list(request)
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def get_queryset(self):
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return StripeCreditCard.objects.filter(owner=self.request.user)
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class PaymentViewSet(viewsets.ModelViewSet):
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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 BalanceViewSet(viewsets.ViewSet):
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permission_classes = [permissions.IsAuthenticated]
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def list(self, request):
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serializer = BalanceSerializer(data={
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'balance': get_balance_for_user(self.request.user)
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})
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serializer.is_valid()
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return Response(serializer.data)
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class ListCards(TemplateView):
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template_name = "uncloud_pay/list_stripe.html"
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@method_decorator(login_required)
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def dispatch(self, *args, **kwargs):
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return super().dispatch(*args, **kwargs)
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def get_context_data(self, **kwargs):
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customer_id = uncloud_stripe.get_customer_id_for(self.request.user)
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cards = uncloud_stripe.get_customer_cards(customer_id)
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context = super().get_context_data(**kwargs)
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context['cards'] = cards
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context['username'] = self.request.user
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return context
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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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"""
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Allow to download
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"""
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bill = self.get_object()
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provider = UncloudProvider.get_provider()
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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 VATRateViewSet(viewsets.ReadOnlyModelViewSet):
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serializer_class = VATRateSerializer
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permission_classes = [permissions.IsAuthenticated]
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queryset = VATRate.objects.all()
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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.billing_addresses.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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