Function getAsyncCache

packages/shared/src/hooks/usePersistentContext.ts:4–22

(
  key: string,
  valueWhenCacheEmpty: T,
  validValues?: T[],
)

import { get as getCache, set as setCache } from 'idb-keyval';

function getAsyncCache<T>(
  key: string,
  valueWhenCacheEmpty: T,
  validValues?: T[],
): Promise<T> {
  return getCache<T>(key)
    .then((cachedValue) => {
      if (
        cachedValue !== undefined &&
        (validValues === undefined || validValues.includes(cachedValue))
      ) {
        return cachedValue;
      }
      return valueWhenCacheEmpty;
    })
    .catch(() => {
      return valueWhenCacheEmpty;
    });
}

export type UserPersistentContextType<T> = [
  T,