✨ [#4789] ConfigurationStep for ZGW API registration config

this step relies on the previously added ServiceConfigurationStep and can be used to set up the necessary configuration for the ZGW API registration backend

src/openforms/conf/base.py

@@ -1212,6 +1212,7 @@
 SETUP_CONFIGURATION_STEPS = [
     "zgw_consumers.contrib.setup_configuration.steps.ServiceConfigurationStep",
     "openforms.contrib.objects_api.setup_configuration.steps.ObjectsAPIConfigurationStep",
+    "openforms.registrations.contrib.zgw_apis.setup_configuration.steps.ZGWApiConfigurationStep",
 ]
 
 #

src/openforms/registrations/contrib/zgw_apis/setup_configuration/models.py

@@ -0,0 +1,48 @@
+from django_setup_configuration.fields import DjangoModelRef
+from django_setup_configuration.models import ConfigurationModel
+from pydantic import Field
+
+from openforms.registrations.contrib.zgw_apis.models import ZGWApiGroupConfig
+
+
+class SingleZGWApiGroupConfigModel(ConfigurationModel):
+    zaken_service_identifier: str = DjangoModelRef(ZGWApiGroupConfig, "zrc_service")
+    documenten_service_identifier: str = DjangoModelRef(
+        ZGWApiGroupConfig,
+        "drc_service",
+    )
+    catalogi_service_identifier: str = DjangoModelRef(
+        ZGWApiGroupConfig,
+        "ztc_service",
+    )
+
+    # Slightly more descriptive name
+    objects_api_json_content_template: str = DjangoModelRef(
+        ZGWApiGroupConfig, "content_json"
+    )
+
+    # FIXME choices and blank=True doesn't seem to be picked up properly
+    zaak_vertrouwelijkheidaanduiding: str = DjangoModelRef(
+        ZGWApiGroupConfig,
+        "zaak_vertrouwelijkheidaanduiding",
+        default="",
+    )
+    doc_vertrouwelijkheidaanduiding: str = DjangoModelRef(
+        ZGWApiGroupConfig, "doc_vertrouwelijkheidaanduiding", default=""
+    )
+
+    class Meta:
+        django_model_refs = {
+            ZGWApiGroupConfig: [
+                "name",
+                "identifier",
+                "catalogue_domain",
+                "catalogue_rsin",
+                "organisatie_rsin",
+                "auteur",
+            ]
+        }
+
+
+class ZGWApiGroupConfigModel(ConfigurationModel):
+    groups: list[SingleZGWApiGroupConfigModel] = Field(default_factory=list)

src/openforms/registrations/contrib/zgw_apis/setup_configuration/steps.py

@@ -0,0 +1,53 @@
+from django_setup_configuration.configuration import BaseConfigurationStep
+from zgw_consumers.models import Service
+
+from openforms.registrations.contrib.zgw_apis.models import ZGWApiGroupConfig
+
+from .models import SingleZGWApiGroupConfigModel, ZGWApiGroupConfigModel
+
+
+def get_service(slug: str) -> Service:
+    """
+    Try to find a Service and re-raise DoesNotExist with the identifier to make debugging
+    easier
+    """
+    try:
+        return Service.objects.get(slug=slug)
+    except Service.DoesNotExist as e:
+        raise Service.DoesNotExist(f"{str(e)} (identifier = {slug})")
+
+
+class ZGWApiConfigurationStep(BaseConfigurationStep[ZGWApiGroupConfigModel]):
+    """
+    Configure configuration groups for the ZGW API backend
+    """
+
+    verbose_name = "Configuration to set up ZGW API registration backend services"
+    config_model = ZGWApiGroupConfigModel
+    namespace = "zgw_api"
+    enable_setting = "zgw_api_config_enable"
+
+    def execute(self, model: ZGWApiGroupConfigModel):
+        config: SingleZGWApiGroupConfigModel
+        for config in model.groups:
+            # setup_configuration typing doesn't work for `django_model_refs` yet,
+            # hence the type: ignores
+            # (https://github.com/maykinmedia/django-setup-configuration/issues/25)
+            defaults = {
+                "name": config.name,  # type: ignore
+                "zrc_service": get_service(config.zaken_service_identifier),
+                "drc_service": get_service(config.documenten_service_identifier),
+                "ztc_service": get_service(config.catalogi_service_identifier),
+                "catalogue_domain": config.catalogue_domain,  # type: ignore
+                "catalogue_rsin": config.catalogue_rsin,  # type: ignore
+                "organisatie_rsin": config.organisatie_rsin,  # type: ignore
+                "zaak_vertrouwelijkheidaanduiding": config.zaak_vertrouwelijkheidaanduiding,
+                "doc_vertrouwelijkheidaanduiding": config.doc_vertrouwelijkheidaanduiding,
+                "auteur": config.auteur,  # type: ignore
+                "content_json": config.objects_api_json_content_template,
+            }
+
+            ZGWApiGroupConfig.objects.update_or_create(
+                identifier=config.identifier,
+                defaults=defaults,
+            )