wip: cloud

cloud/core/src/util/memo.ts

@@ -1,11 +1,18 @@
-export function memo<T>(fn: () => T) {
+export function memo<T>(fn: () => T, cleanup?: (input: T) => Promise<void>) {
   let value: T | undefined
   let loaded = false
 
-  return (): T => {
+  const result = (): T => {
     if (loaded) return value as T
     loaded = true
     value = fn()
     return value as T
   }
+  result.reset = async () => {
+    if (cleanup && value) await cleanup(value)
+    loaded = false
+    value = undefined
+  }
+
+  return result
 }