New signal order_fee_type_name

doc/development/api/general.rst

@@ -19,7 +19,7 @@ Order events
 There are multiple signals that will be sent out in the ordering cycle:
 
 .. automodule:: pretix.base.signals
-   :members: validate_cart, fee_calculation_for_cart, order_fee_calculation, order_paid, order_placed
+   :members: validate_cart, fee_calculation_for_cart, order_fee_calculation, order_paid, order_placed, order_fee_type_name
 
 Frontend
 --------

src/pretix/base/services/stats.py

@@ -7,6 +7,7 @@ from django.utils.translation import ugettext_lazy as _
 from pretix.base.models import Event, Item, ItemCategory, Order, OrderPosition
 from pretix.base.models.event import SubEvent
 from pretix.base.models.orders import OrderFee
+from pretix.base.signals import order_fee_type_name
 
 
 class DummyObject:
@@ -199,9 +200,15 @@ def order_overview(event: Event, subevent: SubEvent=None) -> Tuple[List[Tuple[It
         for pprov, total in sorted(num_total.items(), key=lambda i: i[0]):
             ppobj = DummyObject()
             if pprov[0] == OrderFee.FEE_TYPE_PAYMENT:
-                ppobj.name = '{} - {}'.format(names[OrderFee.FEE_TYPE_PAYMENT], provider_names.get(pprov[1], pprov[1]))
+                ppobj.name = '{} - {}'.format(names[pprov[0]], provider_names.get(pprov[1], pprov[1]))
             else:
-                ppobj.name = '{} - {}'.format(names[OrderFee.FEE_TYPE_PAYMENT], pprov[1])
+                name = pprov[1]
+                for r, resp in order_fee_type_name.send(sender=event, fee_type=pprov[0], internal_type=pprov[1]):
+                    if resp:
+                        name = resp
+                        break
+
+                ppobj.name = '{} - {}'.format(names[pprov[0]], name)
             ppobj.provider = pprov[1]
             ppobj.has_variations = False
             ppobj.num_total = total

src/pretix/base/signals.py

@@ -250,3 +250,14 @@ As with all plugin signals, the ``sender`` keyword argument will contain the eve
 argument will contain the cart positions and ``invoice_address`` the invoice address (useful for
 tax calculation). The argument ``meta_info`` contains the order's meta dictionary.
 """
+
+order_fee_type_name = EventPluginSignal(
+    providing_args=['request', 'fee']
+)
+"""
+This signals allows you to return a human-readable description for a fee type based on the ``fee_type``
+and ``internal_type`` attributes of the ``OrderFee`` model that you get as keyword arguments. You are
+expected to return a string or None, if you don't know about this fee.
+
+As with all plugin signals, the ``sender`` keyword argument will contain the event.
+"""