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Merge branch 'sync-old-meowpay-patches' into 'master'

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Revamped payment pipeline (imported from nico/mew-cloud)

See merge request uncloud/uncloud!3
This commit is contained in:
nico14571 2020-04-09 11:31:49 +02:00
commit d6bdf5c991
10 changed files with 356 additions and 148 deletions
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6
uncloud_django_based/uncloud/uncloud/secrets_sample.py
View file

@ -1,6 +1,3 @@
# Live/test key from stripe
STRIPE_KEY = ''
# XML-RPC interface of opennebula
OPENNEBULA_URL = 'https://opennebula.ungleich.ch:2634/RPC2'
@ -15,6 +12,7 @@ LDAP_ADMIN_PASSWORD=""
LDAP_SERVER_URI = ""
# Stripe (Credit Card payments)
STRIPE_API_key=""
STRIPE_KEY=""
STRIPE_PUBLIC_KEY=""
SECRET_KEY="dx$iqt=lc&yrp^!z5$ay^%g5lhx1y3bcu=jg(jx0yj0ogkfqvf"

1
uncloud_django_based/uncloud/uncloud/urls.py
View file

@ -54,7 +54,6 @@ router.register(r'payment-method', payviews.PaymentMethodViewSet, basename='paym
router.register(r'bill', payviews.BillViewSet, basename='bill')
router.register(r'order', payviews.OrderViewSet, basename='order')
router.register(r'payment', payviews.PaymentViewSet, basename='payment')
router.register(r'payment-method', payviews.PaymentMethodViewSet, basename='payment-methods')
# admin/staff urls

27
uncloud_django_based/uncloud/uncloud_pay/migrations/0002_auto_20200305_1524.py Normal file
View file

@ -0,0 +1,27 @@
# Generated by Django 3.0.3 on 2020-03-05 15:24
from django.db import migrations, models
class Migration(migrations.Migration):
dependencies = [
('uncloud_pay', '0001_initial'),
]
operations = [
migrations.RenameField(
model_name='paymentmethod',
old_name='stripe_card_id',
new_name='stripe_payment_method_id',
),
migrations.AddField(
model_name='paymentmethod',
name='stripe_setup_intent_id',
field=models.CharField(blank=True, max_length=32, null=True),
),
migrations.AlterUniqueTogether(
name='paymentmethod',
unique_together=set(),
),
]

18
uncloud_django_based/uncloud/uncloud_pay/migrations/0003_auto_20200305_1354.py Normal file
View file

@ -0,0 +1,18 @@
# Generated by Django 3.0.3 on 2020-03-05 13:54
from django.db import migrations, models
class Migration(migrations.Migration):
dependencies = [
('uncloud_pay', '0002_auto_20200305_1524.py'),
]
operations = [
migrations.AlterField(
model_name='paymentmethod',
name='primary',
field=models.BooleanField(default=False, editable=False),
),
]

70
uncloud_django_based/uncloud/uncloud_pay/models.py
View file

@ -4,9 +4,7 @@ from django.contrib.auth import get_user_model
from django.core.validators import MinValueValidator
from django.utils.translation import gettext_lazy as _
from django.utils import timezone
from django.dispatch import receiver
from django.core.exceptions import ObjectDoesNotExist
import django.db.models.signals as signals
import uuid
from functools import reduce
@ -106,57 +104,69 @@ class PaymentMethod(models.Model):
),
default='stripe')
description = models.TextField()
primary = models.BooleanField(default=True)
primary = models.BooleanField(default=False, editable=False)
# Only used for "Stripe" source
stripe_card_id = models.CharField(max_length=32, blank=True, null=True)
stripe_payment_method_id = models.CharField(max_length=32, blank=True, null=True)
stripe_setup_intent_id = models.CharField(max_length=32, blank=True, null=True)
@property
def stripe_card_last4(self):
if self.source == 'stripe':
card_request = uncloud_pay.stripe.get_card(
StripeCustomer.objects.get(owner=self.owner).stripe_id,
self.stripe_card_id)
if card_request['error'] == None:
return card_request['response_object']['last4']
else:
return None
if self.source == 'stripe' and self.active:
payment_method = uncloud_pay.stripe.get_payment_method(
self.stripe_payment_method_id)
return payment_method.card.last4
else:
return None
@property
def active(self):
if self.source == 'stripe' and self.stripe_payment_method_id != None:
return True
else:
return False
def charge(self, amount):
if amount > 0: # Make sure we don't charge negative amount by errors...
if self.source == 'stripe':
stripe_customer = StripeCustomer.objects.get(owner=self.owner).stripe_id
charge_request = uncloud_pay.stripe.charge_customer(amount, stripe_customer, self.stripe_card_id)
if charge_request['error'] == None:
payment = Payment(owner=self.owner, source=self.source, amount=amount)
payment.save() # TODO: Check return status
if not self.active:
raise Exception('This payment method is inactive.')
return payment
else:
raise Exception('Stripe error: {}'.format(charge_request['error']))
else:
raise Exception('This payment method is unsupported/cannot be charged.')
else:
if amount < 0: # Make sure we don't charge negative amount by errors...
raise Exception('Cannot charge negative amount.')
if self.source == 'stripe':
stripe_customer = StripeCustomer.objects.get(owner=self.owner).stripe_id
stripe_payment = uncloud_pay.stripe.charge_customer(
amount, stripe_customer, self.stripe_payment_method_id)
if 'paid' in stripe_payment and stripe_payment['paid'] == False:
raise Exception(stripe_payment['error'])
else:
payment = Payment.objects.create(
owner=self.owner, source=self.source, amount=amount)
return payment
else:
raise Exception('This payment method is unsupported/cannot be charged.')
def set_as_primary_for(self, user):
methods = PaymentMethod.objects.filter(owner=user, primary=True)
for method in methods:
print(method)
method.primary = False
method.save()
self.primary = True
self.save()
def get_primary_for(user):
methods = PaymentMethod.objects.filter(owner=user)
for method in methods:
# Do we want to do something with non-primary method?
if method.primary:
return method
return None
class Meta:
unique_together = [['owner', 'primary']]
###
# Bills & Payments.
# Bills.
class Bill(models.Model):
uuid = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)

21
uncloud_django_based/uncloud/uncloud_pay/serializers.py
View file

@ -8,30 +8,29 @@ from .models import *
class PaymentSerializer(serializers.ModelSerializer):
class Meta:
model = Payment
fields = ['owner', 'amount', 'source', 'timestamp']
fields = '__all__'
class PaymentMethodSerializer(serializers.ModelSerializer):
stripe_card_last4 = serializers.IntegerField()
class Meta:
model = PaymentMethod
fields = ['uuid', 'source', 'description', 'primary', 'stripe_card_last4']
fields = ['uuid', 'source', 'description', 'primary', 'stripe_card_last4', 'active']
class UpdatePaymentMethodSerializer(serializers.ModelSerializer):
class Meta:
model = PaymentMethod
fields = ['description']
class ChargePaymentMethodSerializer(serializers.Serializer):
amount = serializers.DecimalField(max_digits=10, decimal_places=2)
class CreditCardSerializer(serializers.Serializer):
number = serializers.IntegerField()
exp_month = serializers.IntegerField()
exp_year = serializers.IntegerField()
cvc = serializers.IntegerField()
class CreatePaymentMethodSerializer(serializers.ModelSerializer):
credit_card = CreditCardSerializer()
please_visit = serializers.CharField(read_only=True)
class Meta:
model = PaymentMethod
fields = ['source', 'description', 'primary', 'credit_card']
fields = ['uuid', 'primary', 'source', 'description', 'please_visit']
read_only_field = ['uuid', 'primary']
###
# Orders & Products.

103
uncloud_django_based/uncloud/uncloud_pay/stripe.py
View file

@ -10,9 +10,14 @@ import uncloud.secrets
# Static stripe configuration used below.
CURRENCY = 'chf'
# README: We use the Payment Intent API as described on
# https://stripe.com/docs/payments/save-and-reuse
# For internal use only.
stripe.api_key = uncloud.secrets.STRIPE_KEY
# Helper (decorator) used to catch errors raised by stripe logic.
# Catch errors that should not be displayed to the end user, raise again.
def handle_stripe_error(f):
def handle_problems(*args, **kwargs):
response = {
@ -21,108 +26,84 @@ def handle_stripe_error(f):
'error': None
}
common_message = "Currently it is not possible to make payments."
common_message = "Currently it is not possible to make payments. Please try agin later."
try:
response_object = f(*args, **kwargs)
response = {
'response_object': response_object,
'error': None
}
return response
return response_object
except stripe.error.CardError as e:
# Since it's a decline, stripe.error.CardError will be caught
body = e.json_body
err = body['error']
response.update({'error': err['message']})
logging.error(str(e))
return response
raise e # For error handling.
except stripe.error.RateLimitError:
response.update(
{'error': "Too many requests made to the API too quickly"})
return response
logging.error("Too many requests made to the API too quickly.")
raise Exception(common_message)
except stripe.error.InvalidRequestError as e:
logging.error(str(e))
response.update({'error': "Invalid parameters"})
return response
raise Exception('Invalid parameters.')
except stripe.error.AuthenticationError as e:
# Authentication with Stripe's API failed
# (maybe you changed API keys recently)
logging.error(str(e))
response.update({'error': common_message})
return response
raise Exception(common_message)
except stripe.error.APIConnectionError as e:
logging.error(str(e))
response.update({'error': common_message})
return response
raise Exception(common_message)
except stripe.error.StripeError as e:
# maybe send email
# XXX: maybe send email
logging.error(str(e))
response.update({'error': common_message})
return response
raise Exception(common_message)
except Exception as e:
# maybe send email
logging.error(str(e))
response.update({'error': common_message})
return response
raise Exception(common_message)
return handle_problems
# Convenience CC container, also used for serialization.
class CreditCard():
number = None
exp_year = None
exp_month = None
cvc = None
def __init__(self, number, exp_month, exp_year, cvc):
self.number=number
self.exp_year = exp_year
self.exp_month = exp_month
self.cvc = cvc
# Actual Stripe logic.
def public_api_key():
return uncloud.secrets.STRIPE_PUBLIC_KEY
def get_customer_id_for(user):
try:
# .get() raise if there is no matching entry.
return uncloud_pay.models.StripeCustomer.objects.get(owner=user).stripe_id
except ObjectDoesNotExist:
# No entry yet - making a new one.
customer_request = create_customer(user.username, user.email)
if customer_request['error'] == None:
mapping = uncloud_pay.models.StripeCustomer.objects.create(
owner=user,
stripe_id=customer_request['response_object']['id']
)
return mapping.stripe_id
else:
try:
customer = create_customer(user.username, user.email)
uncloud_stripe_mapping = uncloud_pay.models.StripeCustomer.objects.create(
owner=user, stripe_id=customer.id)
return uncloud_stripe_mapping.stripe_id
except Exception as e:
return None
@handle_stripe_error
def create_card(customer_id, credit_card):
return stripe.Customer.create_source(
customer_id,
card={
'number': credit_card.number,
'exp_month': credit_card.exp_month,
'exp_year': credit_card.exp_year,
'cvc': credit_card.cvc
})
def create_setup_intent(customer_id):
return stripe.SetupIntent.create(customer=customer_id)
@handle_stripe_error
def get_card(customer_id, card_id):
return stripe.Customer.retrieve_source(customer_id, card_id)
def get_setup_intent(setup_intent_id):
return stripe.SetupIntent.retrieve(setup_intent_id)
def get_payment_method(payment_method_id):
return stripe.PaymentMethod.retrieve(payment_method_id)
@handle_stripe_error
def charge_customer(amount, customer_id, card_id):
# Amount is in CHF but stripes requires smallest possible unit.
# See https://stripe.com/docs/api/charges/create
# https://stripe.com/docs/api/payment_intents/create#create_payment_intent-amount
adjusted_amount = int(amount * 100)
return stripe.Charge.create(
amount=adjusted_amount,
currency=CURRENCY,
customer=customer_id,
source=card_id)
return stripe.PaymentIntent.create(
amount=adjusted_amount,
currency=CURRENCY,
customer=customer_id,
payment_method=card_id,
off_session=True,
confirm=True,
)
@handle_stripe_error
def create_customer(name, email):

18
uncloud_django_based/uncloud/uncloud_pay/templates/error.html.j2 Normal file
View file

@ -0,0 +1,18 @@
<!DOCTYPE html>
<html>
<head>
<title>Error</title>
<style>
#content {
width: 400px;
margin: auto;
}
</style>
</head>
<body>
<div id="content">
<h1>Error</h1>
<p>{{ error }}</p>
</div>
</body>
</html>

76
uncloud_django_based/uncloud/uncloud_pay/templates/stripe-payment.html.j2 Normal file
View file

@ -0,0 +1,76 @@
<!DOCTYPE html>
<html>
<head>
<title>Stripe Card Registration</title>
<!-- https://stripe.com/docs/js/appendix/viewport_meta_requirements -->
<meta name="viewport" content="width=device-width, initial-scale=1" />
<script src="https://js.stripe.com/v3/"></script>
<style>
#content {
width: 400px;
margin: auto;
}
#callback-form {
display: none;
}
</style>
</head>
<body>
<div id="content">
<h1>Registering Stripe Credit Card</h1>
<!-- Stripe form and messages -->
<span id="message"></span>
<form id="setup-form">
<div id="card-element"></div>
<button type='button' id="card-button">
Save
</button>
</form>
<!-- Dirty hack used for callback to API -->
<form id="callback-form" action="{{ callback }}" method="post"></form>
</div>
<!-- Enable Stripe from UI elements -->
<script>
var stripe = Stripe('{{ stripe_pk }}');
var elements = stripe.elements();
var cardElement = elements.create('card');
cardElement.mount('#card-element');
</script>
<!-- Handle card submission -->
<script>
var cardButton = document.getElementById('card-button');
var messageContainer = document.getElementById('message');
var clientSecret = '{{ client_secret }}';
cardButton.addEventListener('click', function(ev) {
stripe.confirmCardSetup(
clientSecret,
{
payment_method: {
card: cardElement,
billing_details: {
},
},
}
).then(function(result) {
if (result.error) {
var message = document.createTextNode('Error:' + result.error.message);
messageContainer.appendChild(message);
} else {
// Return to API on success.
document.getElementById("callback-form").submit();
}
});
});
</script>
</body>
</html>

164
uncloud_django_based/uncloud/uncloud_pay/views.py
View file

@ -1,9 +1,12 @@
from django.shortcuts import render
from django.db import transaction
from django.contrib.auth import get_user_model
from rest_framework import viewsets, permissions, status
from rest_framework import viewsets, permissions, status, views
from rest_framework.renderers import TemplateHTMLRenderer
from rest_framework.response import Response
from rest_framework.decorators import action
from rest_framework.reverse import reverse
from rest_framework.decorators import renderer_classes
import json
@ -13,26 +16,7 @@ from datetime import datetime
import uncloud_pay.stripe as uncloud_stripe
###
# Standard user views:
class BalanceViewSet(viewsets.ViewSet):
# here we return a number
# number = sum(payments) - sum(bills)
#bills = Bill.objects.filter(owner=self.request.user)
#payments = Payment.objects.filter(owner=self.request.user)
# sum_paid = sum([ amount for amount payments..,. ]) # you get the picture
# sum_to_be_paid = sum([ amount for amount bills..,. ]) # you get the picture
pass
class BillViewSet(viewsets.ReadOnlyModelViewSet):
serializer_class = BillSerializer
permission_classes = [permissions.IsAuthenticated]
def get_queryset(self):
return Bill.objects.filter(owner=self.request.user)
# Payments and Payment Methods.
class PaymentViewSet(viewsets.ReadOnlyModelViewSet):
serializer_class = PaymentSerializer
@ -48,19 +32,19 @@ class OrderViewSet(viewsets.ReadOnlyModelViewSet):
def get_queryset(self):
return Order.objects.filter(owner=self.request.user)
class PaymentMethodViewSet(viewsets.ModelViewSet):
permission_classes = [permissions.IsAuthenticated]
def get_serializer_class(self):
if self.action == 'create':
return CreatePaymentMethodSerializer
elif self.action == 'update':
return UpdatePaymentMethodSerializer
elif self.action == 'charge':
return ChargePaymentMethodSerializer
else:
return PaymentMethodSerializer
def get_queryset(self):
return PaymentMethod.objects.filter(owner=self.request.user)
@ -70,28 +54,38 @@ class PaymentMethodViewSet(viewsets.ModelViewSet):
serializer = self.get_serializer(data=request.data)
serializer.is_valid(raise_exception=True)
# Retrieve Stripe customer ID for user.
customer_id = uncloud_stripe.get_customer_id_for(request.user)
if customer_id == None:
return Response(
# Set newly created method as primary if no other method is.
if PaymentMethod.get_primary_for(request.user) == None:
serializer.validated_data['primary'] = True
if serializer.validated_data['source'] == "stripe":
# Retrieve Stripe customer ID for user.
customer_id = uncloud_stripe.get_customer_id_for(request.user)
if customer_id == None:
return Response(
{'error': 'Could not resolve customer stripe ID.'},
status=status.HTTP_500_INTERNAL_SERVER_ERROR)
# Register card under stripe customer.
credit_card = uncloud_stripe.CreditCard(**serializer.validated_data.pop('credit_card'))
card_request = uncloud_stripe.create_card(customer_id, credit_card)
if card_request['error']:
return Response({'stripe_error': card_request['error']}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
card_id = card_request['response_object']['id']
try:
setup_intent = uncloud_stripe.create_setup_intent(customer_id)
except Exception as e:
return Response({'error': str(e)},
status=status.HTTP_500_INTERNAL_SERVER_ERROR)
# Save payment method locally.
serializer.validated_data['stripe_card_id'] = card_request['response_object']['id']
payment_method = PaymentMethod.objects.create(owner=request.user, **serializer.validated_data)
payment_method = PaymentMethod.objects.create(
owner=request.user,
stripe_setup_intent_id=setup_intent.id,
**serializer.validated_data)
# We do not want to return the credit card details sent with the POST
# request.
output_serializer = PaymentMethodSerializer(payment_method)
return Response(output_serializer.data)
# TODO: find a way to use reverse properly:
# https://www.django-rest-framework.org/api-guide/reverse/
path = "payment-method/{}/register-stripe-cc".format(
payment_method.uuid)
stripe_registration_url = reverse('api-root', request=request) + path
return Response({'please_visit': stripe_registration_url})
else:
serializer.save(owner=request.user, **serializer.validated_data)
return Response(serializer.data)
@action(detail=True, methods=['post'])
def charge(self, request, pk=None):
@ -106,8 +100,96 @@ class PaymentMethodViewSet(viewsets.ModelViewSet):
except Exception as e:
return Response({'error': str(e)}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
@action(detail=True, methods=['get'], url_path='register-stripe-cc', renderer_classes=[TemplateHTMLRenderer])
def register_stripe_cc(self, request, pk=None):
payment_method = self.get_object()
if payment_method.source != 'stripe':
return Response(
{'error': 'This is not a Stripe-based payment method.'},
template_name='error.html.j2')
if payment_method.active:
return Response(
{'error': 'This payment method is already active'},
template_name='error.html.j2')
try:
setup_intent = uncloud_stripe.get_setup_intent(
payment_method.stripe_setup_intent_id)
except Exception as e:
return Response(
{'error': str(e)},
template_name='error.html.j2')
# TODO: find a way to use reverse properly:
# https://www.django-rest-framework.org/api-guide/reverse/
callback_path= "payment-method/{}/activate-stripe-cc/".format(
payment_method.uuid)
callback = reverse('api-root', request=request) + callback_path
# Render stripe card registration form.
template_args = {
'client_secret': setup_intent.client_secret,
'stripe_pk': uncloud_stripe.public_api_key,
'callback': callback
}
return Response(template_args, template_name='stripe-payment.html.j2')
@action(detail=True, methods=['post'], url_path='activate-stripe-cc')
def activate_stripe_cc(self, request, pk=None):
payment_method = self.get_object()
try:
setup_intent = uncloud_stripe.get_setup_intent(
payment_method.stripe_setup_intent_id)
except Exception as e:
return Response({'error': str(e)}, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
# Card had been registered, fetching payment method.
print(setup_intent)
if setup_intent.payment_method:
payment_method.stripe_payment_method_id = setup_intent.payment_method
payment_method.save()
return Response({
'uuid': payment_method.uuid,
'activated': payment_method.active})
else:
error = 'Could not fetch payment method from stripe. Please try again.'
return Response({'error': error})
@action(detail=True, methods=['post'], url_path='set-as-primary')
def set_as_primary(self, request, pk=None):
payment_method = self.get_object()
payment_method.set_as_primary_for(request.user)
serializer = self.get_serializer(payment_method)
return Response(serializer.data)
###
# Admin views.
# Bills and Orders.
class BillViewSet(viewsets.ReadOnlyModelViewSet):
serializer_class = BillSerializer
permission_classes = [permissions.IsAuthenticated]
def get_queryset(self):
return Bill.objects.filter(owner=self.request.user)
def unpaid(self, request):
return Bill.objects.filter(owner=self.request.user, paid=False)
class OrderViewSet(viewsets.ReadOnlyModelViewSet):
serializer_class = OrderSerializer
permission_classes = [permissions.IsAuthenticated]
def get_queryset(self):
return Order.objects.filter(owner=self.request.user)
###
# Old admin stuff.
class AdminPaymentViewSet(viewsets.ModelViewSet):
serializer_class = PaymentSerializer