Pluggable invoice transmission methods (#5020)

* Flexible invoice transmission

* UI work

* Add peppol and output

* API support

* Profile integration

* Simplify form for individuals

* Remove sent_to_customer usage

* more steps

* Revert "Bank transfer: Allow to send the invoice direclty to the accounting department (#2975)"

This reverts commit cea6c340be.

* minor fixes

* Fixes after rebase

* update stati

* Backend view

* Transmit and show status

* status, retransmission

* API retransmission

* More fields

* API docs

* Plugin docs

* Update migration

* Add missing license headers

* Remove dead code, fix current tests

* Run isort

* Update regex

* Rebase migration

* Fix migration

* Add tests, fix bugs

* Rebase migration

* Apply suggestion from @luelista

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

* Apply suggestion from @luelista

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

* Apply suggestion from @luelista

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

* Apply suggestion from @luelista

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

* Apply suggestion from @luelista

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

* Make migration reversible

* Add TransmissionType.enforce_transmission

* Fix registries API usage after rebase

* Remove code I forgot to delete

* Update transmission status display depending on type

* Add testmode_supported

* Update src/pretix/static/pretixbase/js/addressform.js

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

* Update src/pretix/static/pretixbase/js/addressform.js

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

* Update src/pretix/static/pretixbase/js/addressform.js

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

* New mechanism for non-required invoice forms

* Update src/pretix/base/invoicing/transmission.py

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

* Declare testmode_supported for email

* Make transmission_email_other an implementation detail

* Fix failing tests and add new ones

* Update src/pretix/base/services/invoices.py

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

* Add emails to email history

* Fix comma error

* More generic default email text

* Cleanup

* Remove "email invoices" button and refine logic

* Rebase migration

* Fix edge case

---------

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

src/tests/control/test_orders.py

@@ -47,9 +47,9 @@ from tests.plugins.stripe.test_checkout import apple_domain_create
 from tests.plugins.stripe.test_provider import MockedCharge
 
 from pretix.base.models import (
-    Event, GiftCard, InvoiceAddress, Item, Order, OrderFee, OrderPayment,
-    OrderPosition, OrderRefund, Organizer, Question, QuestionAnswer, Quota,
-    Team, User,
+    Event, GiftCard, Invoice, InvoiceAddress, Item, Order, OrderFee,
+    OrderPayment, OrderPosition, OrderRefund, Organizer, Question,
+    QuestionAnswer, Quota, Team, User,
 )
 from pretix.base.payment import PaymentException
 from pretix.base.services.invoices import (
@@ -625,6 +625,19 @@ def test_order_invoice_create_ok(client, env):
         assert env[2].invoices.exists()
 
 
+@pytest.mark.django_db
+def test_order_invoice_retransmit(client, env):
+    client.login(email='dummy@dummy.dummy', password='dummy')
+    with scopes_disabled():
+        i = generate_invoice(env[2])
+        i.transmission_status = Invoice.TRANSMISSION_STATUS_FAILED
+        i.save()
+    response = client.post('/control/event/dummy/dummy/orders/FOO/invoices/%d/retransmit' % i.pk, {}, follow=True)
+    assert 'alert-success' in response.content.decode()
+    i.refresh_from_db()
+    assert i.transmission_status == Invoice.TRANSMISSION_STATUS_PENDING
+
+
 @pytest.mark.django_db
 def test_order_invoice_regenerate(client, env):
     client.login(email='dummy@dummy.dummy', password='dummy')