Function persisted

packages/app/src/utils/persist.ts:553–661

(
  target: string | PersistTarget,
  store: [Store<T>, SetStoreFunction<T>],
)

}

export function persisted<T>(
  target: string | PersistTarget,
  store: [Store<T>, SetStoreFunction<T>],
): PersistedWithReady<T> {
  const platform = usePlatform()
  const config = resolveTarget(typeof target === "string" ? { key: target } : target, platform)

  const defaults = snapshot(store[0])
  const legacy = config.legacy ?? []

  const isDesktop = platform.platform === "desktop" && !!platform.storage

  const currentStorage = (() => {
    if (isDesktop) return platform.storage?.(config.storage)
    if (!config.storage) return localStorageDirect()
    return localStorageWithPrefix(config.storage)
  })()

  const legacyStorage = (() => {
    if (!isDesktop) return localStorageDirect()
    if (!config.storage) return platform.storage?.()
    return platform.storage?.(LEGACY_STORAGE)
  })()

  const legacyStorageNames = config.legacyStorageNames ?? []

  const storage = (() => {
    if (!isDesktop) {
      const current = currentStorage as SyncStorage
      const legacyStore = legacyStorage as SyncStorage
      const legacyStores = legacyStorageNames.map(localStorageWithPrefix)

      const api: SyncStorage = {
        getItem: (key) => {
          const value = readCurrent({ storage: current, key, defaults, migrate: config.migrate })
          if (value !== undefined) return value
          return migrateLegacy({
            current,
            legacyStore,
            stores: legacyStores,
            keys: legacy,
            key,
            defaults,
            migrate: config.migrate,
          })
        },
        setItem: (key, value) => {
          current.setItem(key, value)
        },
        removeItem: (key) => {
          current.removeItem(key)
        },
      }

      return api
    }

    const current = currentStorage as AsyncStorage