Integrate address sources with credential envelopes

src/govoplan_addresses/backend/router.py

@@ -41,6 +41,8 @@ from govoplan_addresses.backend.schemas import (
     AddressCardDavDiscoveryRequest,
     AddressCardDavDiscoveryResponse,
     AddressCardDavSourceCreateRequest,
+    AddressCredentialEnvelopeListResponse,
+    AddressCredentialEnvelopeResponse,
     AddressSyncAttemptFinishRequest,
     AddressSyncConflictCreateRequest,
     AddressSyncConflictListResponse,
@@ -69,6 +71,7 @@ from govoplan_addresses.backend.schemas import (
 )
 from govoplan_addresses.backend.service import (
     AddressBookError,
+    available_address_credentials,
     address_book_contact_counts,
     address_list_entry_counts,
     create_address_book,
@@ -639,6 +642,25 @@ def api_discover_carddav_address_books(
         raise _error(AddressBookError(str(exc))) from exc
 
 
+@router.get("/credentials", response_model=AddressCredentialEnvelopeListResponse)
+def api_list_address_credentials(
+    source_id: str | None = Query(default=None),
+    principal: ApiPrincipal = Depends(get_api_principal),
+    session: Session = Depends(get_session),
+):
+    _require_scope(principal, "addresses:sync:write")
+    return AddressCredentialEnvelopeListResponse(
+        credentials=[
+            AddressCredentialEnvelopeResponse.model_validate(item)
+            for item in available_address_credentials(
+                session,
+                principal,
+                source_id=source_id,
+            )
+        ]
+    )
+
+
 @router.post("/address-books/{book_id}/carddav/sources", response_model=AddressSyncSourceResponse, status_code=status.HTTP_201_CREATED)
 def api_create_carddav_sync_source(
     book_id: str,