Allow to use custom domains for some but not all events (Z#23153875) (#4627)

* Allow to use custom domains for some but not all events

* Update src/pretix/multidomain/urlreverse.py

* Apply suggestions from code review

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

* Logging for domain config changes

---------

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

src/tests/presale/test_customer.py

@@ -378,6 +378,13 @@ def test_org_sso_login_new_customer_popup(env, client, provider):
     _sso_login(client, provider, popup_origin="https://popuporigin")
 
 
+@pytest.mark.django_db
+def test_org_sso_login_new_customer_popup_org_alt_domain(env, client, provider):
+    d = KnownDomain.objects.create(organizer=env[0], domainname="popuporigin", mode=KnownDomain.MODE_ORG_ALT_DOMAIN)
+    d.event_assignments.create(event=env[1])
+    _sso_login(client, provider, popup_origin="https://popuporigin")
+
+
 @pytest.mark.django_db
 def test_org_sso_login_new_customer_popup_invalid_origin(env, client, provider):
     KnownDomain.objects.create(organizer=env[0], event=env[1], domainname="popuporigin")
@@ -696,16 +703,21 @@ def client2():
     return Client()
 
 
-def _cross_domain_login(env, client, client2):
+def _cross_domain_login(env, client, client2, org_alt=False):
     with scopes_disabled():
         customer = env[0].customers.create(email='john@example.org', is_verified=True)
         customer.set_password('foo')
         customer.save()
         KnownDomain.objects.create(domainname='org.test', organizer=env[0])
-        KnownDomain.objects.create(domainname='event.test', organizer=env[0], event=env[1])
+        if org_alt:
+            d = KnownDomain.objects.create(domainname='event.test', organizer=env[0], mode=KnownDomain.MODE_ORG_ALT_DOMAIN)
+            d.event_assignments.create(event=env[1])
+        else:
+            KnownDomain.objects.create(domainname='event.test', organizer=env[0], event=env[1])
 
     # Log in on org domain
-    r = client.post('/account/login?next=https://event.test/redeem&request_cross_domain_customer_auth=true', {
+    path = '/conf/' if org_alt else '/'
+    r = client.post(f'/account/login?next=https://event.test{path}redeem&request_cross_domain_customer_auth=true', {
         'email': 'john@example.org',
         'password': 'foo',
     }, HTTP_HOST='org.test')
@@ -713,12 +725,12 @@ def _cross_domain_login(env, client, client2):
 
     u = urlparse(r.headers['Location'])
     assert u.netloc == 'event.test'
-    assert u.path == '/redeem'
+    assert u.path == path + 'redeem'
     q = parse_qs(u.query)
     assert 'cross_domain_customer_auth' in q
 
     # Take session over to event domain
-    r = client2.get(f'/?{u.query}', HTTP_HOST='event.test')
+    r = client2.get(f'{path}?{u.query}', HTTP_HOST='event.test')
     assert r.status_code == 200
     assert b'john@example.org' in r.content
 
@@ -727,12 +739,27 @@ def _cross_domain_login(env, client, client2):
 def test_cross_domain_login(env, client, client2):
     _cross_domain_login(env, client, client2)
 
-    # Logged in on org domain
+    # Logged in on evnet domain
     r = client.get('/', HTTP_HOST='event.test')
     assert r.status_code == 200
     assert b'john@example.org' in r.content
 
-    # Logged in on event domain
+    # Logged in on org domain
+    r = client2.get('/', HTTP_HOST='org.test')
+    assert r.status_code == 200
+    assert b'john@example.org' in r.content
+
+
+@pytest.mark.django_db
+def test_cross_domain_login_org_alt(env, client, client2):
+    _cross_domain_login(env, client, client2, org_alt=True)
+
+    # Logged in on org alt domain
+    r = client.get('/conf/', HTTP_HOST='event.test')
+    assert r.status_code == 200
+    assert b'john@example.org' in r.content
+
+    # Logged in on org domain
     r = client2.get('/', HTTP_HOST='org.test')
     assert r.status_code == 200
     assert b'john@example.org' in r.content