Invoices: Allow issuing invoices only to businesses

In situations where every invoice has a significant accounting cost and
consumers usually do not need invoices, this can save a lot of money or
effort.

src/pretix/api/serializers/event.py

@@ -806,6 +806,7 @@ class EventSettingsSerializer(SettingsSerializer):
         'invoice_reissue_after_modify',
         'invoice_include_free',
         'invoice_generate',
+        'invoice_generate_only_business',
         'invoice_period',
         'invoice_numbers_consecutive',
         'invoice_numbers_prefix',

src/pretix/api/views/order.py

@@ -2031,7 +2031,7 @@ class InvoiceViewSet(viewsets.ReadOnlyModelViewSet):
         else:
             order = Order.objects.select_for_update(of=OF_SELF).get(pk=inv.order_id)
             c = generate_cancellation(inv)
-            if inv.order.status != Order.STATUS_CANCELED:
+            if invoice_qualified(order):
                 inv = generate_invoice(order)
             else:
                 inv = c

src/pretix/base/services/invoices.py

@@ -521,9 +521,20 @@ def invoice_pdf_task(invoice: int):
 
 
 def invoice_qualified(order: Order):
-    if order.total == Decimal('0.00') or order.require_approval or \
-            order.sales_channel.identifier not in order.event.settings.get('invoice_generate_sales_channels'):
+    if order.total == Decimal('0.00'):
         return False
+    if order.require_approval:
+        return False
+    if order.sales_channel.identifier not in order.event.settings.invoice_generate_sales_channels:
+        return False
+    if order.status in (Order.STATUS_CANCELED, Order.STATUS_EXPIRED):
+        return False
+    if order.event.settings.invoice_generate_only_business:
+        try:
+            ia = order.invoice_address
+            return ia.is_business
+        except InvoiceAddress.DoesNotExist:
+            return False
     return True
 
 

src/pretix/base/settings.py

@@ -1225,6 +1225,15 @@ DEFAULTS = {
         'default': json.dumps(['web']),
         'type': list
     },
+    'invoice_generate_only_business': {
+        'default': 'False',
+        'type': bool,
+        'form_class': forms.BooleanField,
+        'serializer_class': serializers.BooleanField,
+        'form_kwargs': dict(
+            label=_("Only issue invoices to business customers"),
+        )
+    },
     'invoice_address_from': {
         'default': '',
         'type': str,

src/pretix/control/forms/event.py

@@ -939,6 +939,7 @@ class InvoiceSettingsForm(EventSettingsValidationMixin, SettingsForm):
         'invoice_show_payments',
         'invoice_reissue_after_modify',
         'invoice_generate',
+        'invoice_generate_only_business',
         'invoice_period',
         'invoice_attendee_name',
         'invoice_event_location',

src/pretix/control/templates/pretixcontrol/event/invoicing.html

@@ -12,6 +12,7 @@
                 <legend>{% trans "Invoice generation" %}</legend>
                 {% bootstrap_field form.invoice_generate layout="control" %}
                 {% bootstrap_field form.invoice_generate_sales_channels layout="control" %}
+                {% bootstrap_field form.invoice_generate_only_business layout="control" %}
                 {% bootstrap_field form.invoice_email_attachment layout="control" %}
                 {% bootstrap_field form.invoice_email_organizer layout="control" %}
                 {% bootstrap_field form.invoice_language layout="control" %}

src/pretix/control/views/orders.py

@@ -1742,7 +1742,7 @@ class OrderInvoiceReissue(OrderView):
                     messages.error(self.request, _('The invoice has been cleaned of personal data.'))
                 else:
                     c = generate_cancellation(inv)
-                    if order.status not in (Order.STATUS_CANCELED, Order.STATUS_EXPIRED):
+                    if invoice_qualified(order):
                         inv = generate_invoice(order)
                     else:
                         inv = c

src/tests/base/test_invoices.py

@@ -612,6 +612,25 @@ def test_sales_channels_qualify(env):
     assert invoice_qualified(order) is False
 
 
+@pytest.mark.django_db
+def test_business_only(env):
+    event, order = env
+    event.settings.set('invoice_generate', 'admin')
+    event.settings.set('invoice_generate_only_business', True)
+    order.total = Decimal('42.00')
+
+    ia = InvoiceAddress.objects.create(company='Acme Company', street='221B Baker Street', is_business=True,
+                                       zipcode='12345', city='London', country_old='England', country='', order=order)
+
+    assert invoice_qualified(order) is True
+
+    ia.is_business = False
+    ia.save()
+
+    # Order with default Sales Channel (web)
+    assert invoice_qualified(order) is False
+
+
 def test_addon_aware_groupby():
     def is_addon(item):
         is_addon, id, price = item