Integrate calendar sources with credential envelopes

src/govoplan_calendar/backend/router.py

@@ -28,6 +28,8 @@ from govoplan_calendar.backend.schemas import (
     CalendarCollectionListResponse,
     CalendarCollectionResponse,
     CalendarCollectionUpdateRequest,
+    CalendarCredentialEnvelopeListResponse,
+    CalendarCredentialEnvelopeResponse,
     CalendarEventCreateRequest,
     CalendarEventDeltaResponse,
     CalendarEventListResponse,
@@ -61,6 +63,7 @@ from govoplan_calendar.backend.service import (
     CALENDAR_EVENT_RESOURCE,
     CALENDAR_MODULE_ID,
     CalendarError,
+    available_calendar_credentials,
     caldav_source_response,
     caldav_sync_response,
     calendar_response,
@@ -129,6 +132,25 @@ def _parse_payload_datetime(value) -> datetime | None:
         return None
 
 
+@router.get("/credentials", response_model=CalendarCredentialEnvelopeListResponse)
+def api_list_calendar_credentials(
+    source_id: str | None = None,
+    principal: ApiPrincipal = Depends(get_api_principal),
+    session: Session = Depends(get_session),
+):
+    _require_scope(principal, "calendar:calendar:admin")
+    return CalendarCredentialEnvelopeListResponse(
+        credentials=[
+            CalendarCredentialEnvelopeResponse.model_validate(item)
+            for item in available_calendar_credentials(
+                session,
+                tenant_id=principal.tenant_id,
+                source_id=source_id,
+            )
+        ]
+    )
+
+
 def _event_interval_overlaps(payload: dict, *, prefix: str, start_at: datetime | None, end_at: datetime | None) -> bool:
     event_start = _parse_payload_datetime(payload.get(f"{prefix}start_at"))
     event_end = _parse_payload_datetime(payload.get(f"{prefix}end_at")) or event_start