Add option to charge fee on free products

pretix_servicefees/signals.py

@@ -32,7 +32,10 @@ def navbar_settings(sender, request, **kwargs):
 def get_fees(event, total, invoice_address, mod='', request=None, positions=[], gift_cards=None):
     if request is not None and not positions:
         positions = get_cart(request)
-    positions = [pos for pos in positions if pos.price != Decimal('0.00')]
+
+    skip_free = event.settings.get('service_fee_skip_free', as_type=bool)
+    if skip_free:
+        positions = [pos for pos in positions if pos.price != Decimal('0.00')]
 
     skip_addons = event.settings.get('service_fee_skip_addons', as_type=bool)
     if skip_addons:
@@ -162,4 +165,5 @@ def order_meta_signal(sender: Event, request: HttpRequest, **kwargs):
     return meta
 
 
-settings_hierarkey.add_default('service_fee_skip_addons', 'True', bool)
+settings_hierarkey.add_default('service_fee_skip_addons', 'True', bool)
+settings_hierarkey.add_default('service_fee_skip_free', 'True', bool)

pretix_servicefees/templates/pretix_servicefees/settings.html

@@ -11,6 +11,7 @@
             {% bootstrap_field form.service_fee_per_ticket addon_after=request.event.currency layout="control" %}
             {% bootstrap_field form.service_fee_skip_non_admission layout="control" %}
             {% bootstrap_field form.service_fee_skip_addons layout="control" %}
+            {% bootstrap_field form.service_fee_skip_free layout="control" %}
             {% bootstrap_field form.service_fee_abs addon_after=request.event.currency layout="control" %}
             {% bootstrap_field form.service_fee_percent addon_after="%" layout="control" %}
             {% bootstrap_field form.service_fee_skip_if_gift_card layout="control" %}

pretix_servicefees/views.py

@@ -41,6 +41,10 @@ class ServiceFeeSettingsForm(SettingsForm):
         label=_('Do not charge per-ticket service fee on non-admission products'),
         required=False
     )
+    service_fee_skip_free = forms.BooleanField(
+        label=_('Do not charge per-ticket service fee on free products UNLESS the entire order is free'),
+        required=False
+    )
 
     service_fee_abs_resellers = forms.DecimalField(
         label=_('Fixed fee per order'),