packages/reffuse/src/types/SearchPaths.ts

@@ -1,3 +1,6 @@
+import { Option, Predicate } from "effect"
+
+
 export type Paths<T> = T extends object
     ? {
         [K in keyof T as K extends string | number | symbol ? K : never]:
@@ -26,9 +29,19 @@ const persons = [
 ]
 
 
-const getFromPath = <T, const P extends Paths<T>>(value: T, path: P): ValueFromPath<T, P> => (
-    path.reduce((acc: any, key: any) => acc?.[key], value)
+export const get = <T, const P extends Paths<T>>(parent: T, path: P): Option.Option<ValueFromPath<T, P>> => path.reduce(
+    (acc: Option.Option<any>, key: any): Option.Option<any> => Option.isSome(acc)
+        ? Predicate.hasProperty(acc.value, key)
+            ? Option.some(acc.value[key])
+            : Option.none()
+        : acc,
+
+    Option.some(parent),
 )
 
-const res = getFromPath(persons, [1, "name"])
+export const getOrUndefined = <T, const P extends Paths<T>>(parent: T, path: P): ValueFromPath<T, P> => (
+    path.reduce((acc: any, key: any) => acc?.[key], parent)
+)
+
+const res = get(persons, [1, "name"])
 console.log(res)