feat: APIPathGen 도우미

hwe/ts/util/APIPathGen.ts

@@ -0,0 +1,30 @@
+type SubValue = string | { [property: string]: SubValue };
+
+const hasKey = <T extends Record<string | symbol, unknown>>(obj: T, k: string | symbol | number): k is keyof T =>
+    k in obj;
+
+export function APIPathGen<K extends string, V extends SubValue>(obj: Record<K, V>, path?: string[]): Record<K, V> {
+    return new Proxy(obj, {
+        get(target, key: K) {
+            if (path === undefined) {
+                path = [key];
+            }
+            else {
+                path.push(key);
+            }
+
+
+            if (hasKey(target, key)) {
+                const next: V = target[key];
+                if (typeof (next) === 'string') {
+                    return path.join('/');
+                }
+                if (typeof (next) === 'object') {
+                    return APIPathGen(next, path);
+                }
+                throw 'unknown';
+            }
+            throw `${path.join('/')} is not exists`;
+        }
+    })
+}