feat: added back secret referencing expansion support

backend/src/lib/fn/array.ts

@@ -17,6 +17,23 @@ export const groupBy = <T, Key extends string | number | symbol>(
     {} as Record<Key, T[]>
   );
 
+/**
+ * Sorts an array of items into groups. The return value is a map where the keys are
+ * the group ids the given getGroupId function produced and the value will be the last found one for the group key
+ */
+export const groupByUnique = <T, Key extends string | number | symbol>(
+  array: readonly T[],
+  getGroupId: (item: T) => Key
+): Record<Key, T> =>
+  array.reduce(
+    (acc, item) => {
+      const groupId = getGroupId(item);
+      acc[groupId] = item;
+      return acc;
+    },
+    {} as Record<Key, T>
+  );
+
 /**
  * Given a list of items returns a new list with only
  * unique items. Accepts an optional identity function