db put should take parent's shared by default.

src/lib/docuri/index.js

@@ -130,4 +130,13 @@ export const route = (route, coding = {}) => {
   };
 };
 
+export const getParentId = (id) => {
+  const tokens = id.split('/').slice(0, -1);
+  if (['1wpt', '2rte', '3trk'].includes(tokens.at(-1))) {
+    tokens.splice(-1);
+  }
+  const parentId = tokens.join('/');
+  return parentId;
+};
+
 export default route;