Stripe connect: Allow to set application fee

src/pretix/plugins/stripe/forms.py

@@ -1,6 +1,8 @@
 from django import forms
 from django.utils.translation import ugettext_lazy as _
 
+from pretix.base.forms import SettingsForm
+
 
 class StripeKeyValidator:
     def __init__(self, prefix):
@@ -21,3 +23,18 @@ class StripeKeyValidator:
                     'prefix': self._prefixes[0],
                 },
             )
+
+
+class OrganizerStripeSettingsForm(SettingsForm):
+    payment_stripe_connect_app_fee_percent = forms.DecimalField(
+        label=_('Stripe Connect: App fee (percent)'),
+        required=False,
+    )
+    payment_stripe_connect_app_fee_max = forms.DecimalField(
+        label=_('Stripe Connect: App fee (max)'),
+        required=False,
+    )
+    payment_stripe_connect_app_fee_min = forms.DecimalField(
+        label=_('Stripe Connect: App fee (min)'),
+        required=False,
+    )

src/pretix/plugins/stripe/payment.py

@@ -3,6 +3,7 @@ import json
 import logging
 import urllib.parse
 from collections import OrderedDict
+from decimal import Decimal
 
 import stripe
 from django import forms
@@ -256,6 +257,20 @@ class StripeMethod(BasePaymentProvider):
     def _get_amount(self, payment):
         return self._decimal_to_int(payment.amount)
 
+    def _connect_kwargs(self, payment):
+        d = {}
+        if self.settings.connect_client_id and self.settings.connect_user_id:
+            fee = Decimal('0.00')
+            if self.settings.get('connect_app_fee_percent', as_type=Decimal):
+                fee = round_decimal(self.settings.get('connect_app_fee_percent', as_type=Decimal) * payment.amount / Decimal('100.00'), self.event.currency)
+            if self.settings.connect_app_fee_max:
+                fee = min(fee, self.settings.get('connect_app_fee_max', as_type=Decimal))
+            if self.settings.get('connect_app_fee_min', as_type=Decimal):
+                fee = max(fee, self.settings.get('connect_app_fee_min', as_type=Decimal))
+            if fee:
+                d['application_fee_amount'] = self._decimal_to_int(fee)
+        return d
+
     @property
     def api_kwargs(self):
         if self.settings.connect_client_id and self.settings.connect_user_id:
@@ -301,6 +316,7 @@ class StripeMethod(BasePaymentProvider):
                     code=payment.order.code
                 )[:22]
             params.update(self.api_kwargs)
+            params.update(self._connect_kwargs(payment))
             charge = stripe.Charge.create(
                 amount=self._get_amount(payment),
                 currency=self.event.currency.lower(),
@@ -612,6 +628,9 @@ class StripeCC(StripeMethod):
 
         try:
             if self.payment_is_valid_session(request):
+                params = {}
+                params.update(self._connect_kwargs(payment))
+                params.update(self.api_kwargs)
                 intent = stripe.PaymentIntent.create(
                     amount=self._get_amount(payment),
                     currency=self.event.currency.lower(),
@@ -638,7 +657,7 @@ class StripeCC(StripeMethod):
                         'payment': payment.pk,
                         'hash': hashlib.sha1(payment.order.secret.lower().encode()).hexdigest(),
                     }),
-                    **self.api_kwargs
+                    **params
                 )
             else:
                 payment_info = json.loads(payment.info)

src/pretix/plugins/stripe/signals.py

@@ -4,7 +4,7 @@ from collections import OrderedDict
 from django import forms
 from django.dispatch import receiver
 from django.template.loader import get_template
-from django.urls import resolve
+from django.urls import resolve, reverse
 from django.utils.translation import ugettext_lazy as _
 
 from pretix.base.settings import settings_hierarkey
@@ -12,6 +12,7 @@ from pretix.base.signals import (
     logentry_display, register_global_settings, register_payment_providers,
     requiredaction_display,
 )
+from pretix.control.signals import nav_organizer
 from pretix.plugins.stripe.forms import StripeKeyValidator
 from pretix.presale.signals import html_head
 
@@ -121,6 +122,18 @@ def register_global_settings(sender, **kwargs):
                 StripeKeyValidator('pk_test_'),
             ),
         )),
+        ('payment_stripe_connect_app_fee_percent', forms.DecimalField(
+            label=_('Stripe Connect: App fee (percent)'),
+            required=False,
+        )),
+        ('payment_stripe_connect_app_fee_max', forms.DecimalField(
+            label=_('Stripe Connect: App fee (max)'),
+            required=False,
+        )),
+        ('payment_stripe_connect_app_fee_min', forms.DecimalField(
+            label=_('Stripe Connect: App fee (min)'),
+            required=False,
+        )),
     ])
 
 
@@ -141,3 +154,20 @@ def pretixcontrol_action_display(sender, action, request, **kwargs):
 
     ctx = {'data': data, 'event': sender, 'action': action}
     return template.render(ctx, request)
+
+
+@receiver(nav_organizer, dispatch_uid="stripe_nav_organizer")
+def nav_o(sender, request, organizer, **kwargs):
+    if request.user.has_active_staff_session(request.session.session_key):
+        url = resolve(request.path_info)
+        return [{
+            'label': _('Stripe Connect'),
+            'url': reverse('plugins:stripe:settings.connect', kwargs={
+                'organizer': request.organizer.slug
+            }),
+            'parent': reverse('control:organizer.edit', kwargs={
+                'organizer': request.organizer.slug
+            }),
+            'active': 'settings.connect' in url.url_name,
+        }]
+    return []

src/pretix/plugins/stripe/templates/pretixplugins/stripe/organizer_stripe.html

@@ -0,0 +1,24 @@
+{% extends "pretixcontrol/base.html" %}
+{% load i18n %}
+{% load bootstrap3 %}
+{% load hierarkey_form %}
+{% load formset_tags %}
+{% block title %}{% trans "Stripe Connect" %}{% endblock %}
+{% block content %}
+    <h1>
+        {% trans "Stripe Connect" %}
+    </h1>
+
+    <form action="" method="post" class="form-horizontal" enctype="multipart/form-data">
+        {% csrf_token %}
+        {% url "control:global.settings" as g_url %}
+        {% propagated request.organizer g_url "payment_stripe_connect_app_fee_percent" "payment_stripe_connect_app_fee_min" "payment_stripe_connect_app_fee_max" %}
+            {% bootstrap_form form layout="control" %}
+        {% endpropagated %}
+        <div class="form-group submit-group">
+            <button type="submit" class="btn btn-primary btn-save">
+                {% trans "Save" %}
+            </button>
+        </div>
+    </form>
+{% endblock %}

src/pretix/plugins/stripe/urls.py

@@ -3,8 +3,9 @@ from django.conf.urls import include, url
 from pretix.multidomain import event_url
 
 from .views import (
-    ReturnView, ScaReturnView, ScaView, applepay_association, oauth_disconnect,
-    oauth_return, redirect_view, webhook,
+    OrganizerSettingsFormView, ReturnView, ScaReturnView, ScaView,
+    applepay_association, oauth_disconnect, oauth_return, redirect_view,
+    webhook,
 )
 
 event_patterns = [
@@ -24,6 +25,8 @@ organizer_patterns = [
 urlpatterns = [
     url(r'^control/event/(?P<organizer>[^/]+)/(?P<event>[^/]+)/stripe/disconnect/',
         oauth_disconnect, name='oauth.disconnect'),
+    url(r'^control/organizer/(?P<organizer>[^/]+)/stripeconnect/',
+        OrganizerSettingsFormView.as_view(), name='settings.connect'),
     url(r'^_stripe/webhook/$', webhook, name='webhook'),
     url(r'^_stripe/oauth_return/$', oauth_return, name='oauth.return'),
     url(r'^.well-known/apple-developer-merchantid-domain-association$', applepay_association, name='applepay.association'),

src/pretix/plugins/stripe/views.py

@@ -17,14 +17,20 @@ from django.views import View
 from django.views.decorators.clickjacking import xframe_options_exempt
 from django.views.decorators.csrf import csrf_exempt
 from django.views.decorators.http import require_POST
+from django.views.generic import FormView
 from django_scopes import scopes_disabled
 
-from pretix.base.models import Event, Order, OrderPayment, Quota
+from pretix.base.models import Event, Order, OrderPayment, Organizer, Quota
 from pretix.base.payment import PaymentException
 from pretix.base.services.locking import LockTimeoutException
 from pretix.base.settings import GlobalSettingsObject
-from pretix.control.permissions import event_permission_required
+from pretix.control.permissions import (
+    AdministratorPermissionRequiredMixin, event_permission_required,
+)
+from pretix.control.views.event import DecoupleMixin
+from pretix.control.views.organizer import OrganizerDetailViewMixin
 from pretix.multidomain.urlreverse import eventreverse
+from pretix.plugins.stripe.forms import OrganizerStripeSettingsForm
 from pretix.plugins.stripe.models import ReferencedStripeObject
 from pretix.plugins.stripe.payment import StripeCC, StripeSettingsHolder
 from pretix.plugins.stripe.tasks import (
@@ -580,3 +586,37 @@ class ScaReturnView(StripeOrderView, View):
         self.order.refresh_from_db()
 
         return render(request, 'pretixplugins/stripe/sca_return.html', {'order': self.order})
+
+
+class OrganizerSettingsFormView(DecoupleMixin, OrganizerDetailViewMixin, AdministratorPermissionRequiredMixin, FormView):
+    model = Organizer
+    permission = 'can_change_organizer_settings'
+    form_class = OrganizerStripeSettingsForm
+    template_name = 'pretixplugins/stripe/organizer_stripe.html'
+
+    def get_success_url(self):
+        return reverse('plugins:stripe:settings.connect', kwargs={
+            'organizer': self.request.organizer.slug,
+        })
+
+    def get_form_kwargs(self):
+        kwargs = super().get_form_kwargs()
+        kwargs['obj'] = self.request.organizer
+        return kwargs
+
+    @transaction.atomic
+    def post(self, request, *args, **kwargs):
+        form = self.get_form()
+        if form.is_valid():
+            form.save()
+            if form.has_changed():
+                self.request.organizer.log_action(
+                    'pretix.organizer.settings', user=self.request.user, data={
+                        k: form.cleaned_data.get(k) for k in form.changed_data
+                    }
+                )
+            messages.success(self.request, _('Your changes have been saved.'))
+            return redirect(self.get_success_url())
+        else:
+            messages.error(self.request, _('We could not save your changes. See below for details.'))
+            return self.get(request)