Pluggable permissions (#5728)

* Data model draft

* Refactor query and assignment usages of old permissions

* Backend UI

* API serializer

* Big string replace

* Docs, tests and fixes for teams api

* Update docs for device auth

* Eliminate old names

* Make tests pass

* Use new permissions, remove inconsistencies

* Add test for translations

* Show plugin permissions

* Add permission for seating plans

* Fix plugin activation

* Fix failing test

* Refactor to permission groups

* Update doc/api/resources/devices.rst

Co-authored-by: luelista <weller@rami.io>

* Update doc/api/resources/events.rst

Co-authored-by: luelista <weller@rami.io>

* Update src/pretix/api/serializers/organizer.py

Co-authored-by: luelista <weller@rami.io>

* Fix typo

* Fix python version compat

* Replacement after rebase

* Add proper permission handling for exports

* Docs for exporters

* Runtime linting of permission names

* Fix typos

* Show export page even without orders permission

* More legacy compat

* Do not strongly validate before plugins are loaded

* Rebase migration

* Add permission for outgoing mails

* Review notes

* Update doc/api/resources/teams.rst

Co-authored-by: Richard Schreiber <schreiber@pretix.eu>

* Clean up logic around exporters

* Review and failures

* Fix migration leading to forbidden combination

* Handle permissions on event copying

* Remove print-statements

* Make test clearer

* Review feedback

* Add AnyPermissionOf

* migration safety

---------

Co-authored-by: luelista <weller@rami.io>
Co-authored-by: Richard Schreiber <schreiber@pretix.eu>

src/tests/testdummy/signals.py

@@ -22,11 +22,13 @@
 from django.dispatch import receiver
 
 from pretix.base.channels import SalesChannelType
+from pretix.base.exporter import BaseExporter
 from pretix.base.invoicing.transmission import (
     TransmissionProvider, transmission_providers,
 )
 from pretix.base.models import Invoice
 from pretix.base.signals import (
+    register_data_exporters, register_multievent_data_exporters,
     register_payment_providers, register_sales_channel_types,
     register_ticket_outputs,
 )
@@ -48,6 +50,40 @@ def register_payment_provider(sender, **kwargs):
     return [DummyPaymentProvider, DummyFullRefundablePaymentProvider, DummyPartialRefundablePaymentProvider]
 
 
+class DummyOrdersExporter(BaseExporter):
+    verbose_name = "Dummy orders"
+    identifier = "dummy_orders"
+
+
+class DummyVoucherExporter(BaseExporter):
+    verbose_name = "Dummy orders"
+    identifier = "dummy_vouchers"
+
+    @classmethod
+    def get_required_event_permission(cls) -> str:
+        return "event.vouchers:read"
+
+
+@receiver(register_data_exporters, dispatch_uid="dummy_exporter_o")
+def register_data_exporters_recv_o(sender, **kwargs):
+    return DummyOrdersExporter
+
+
+@receiver(register_data_exporters, dispatch_uid="dummy_exporter_v")
+def register_data_exporters_recv_v(sender, **kwargs):
+    return DummyVoucherExporter
+
+
+@receiver(register_multievent_data_exporters, dispatch_uid="dummy_exporter_multi_o")
+def register_multievent_data_exporters_recv_o(sender, **kwargs):
+    return DummyOrdersExporter
+
+
+@receiver(register_multievent_data_exporters, dispatch_uid="dummy_exporter_multi_v")
+def register_multievent_data_exporters_recv(sender, **kwargs):
+    return DummyVoucherExporter
+
+
 class FoobazSalesChannel(SalesChannelType):
     identifier = "baz"
     verbose_name = "Foobar"