Function migrateLegacyAsync

packages/app/src/utils/persist.ts:298–338

(input: {
  current: AsyncStorage
  legacyStore?: AsyncStorage
  stores: AsyncStorage[]
  keys: string[]
  key: string
  defaults: unknown
  migrate?: (value: unknown) => unknown
})

}

async function migrateLegacyAsync(input: {
  current: AsyncStorage
  legacyStore?: AsyncStorage
  stores: AsyncStorage[]
  keys: string[]
  key: string
  defaults: unknown
  migrate?: (value: unknown) => unknown
}) {
  for (const store of input.stores) {
    const raw = await store.getItem(input.key)
    if (raw === null) continue

    const next = normalize(input.defaults, raw, input.migrate)
    if (next === undefined) {
      await removeAsync(store, input.key)
      continue
    }
    await input.current.setItem(input.key, next)
    await store.removeItem(input.key)
    return next
  }

  if (!input.legacyStore) return null

  for (const key of input.keys) {
    const raw = await input.legacyStore.getItem(key)
    if (raw === null) continue

    const next = normalize(input.defaults, raw, input.migrate)
    if (next === undefined) {
      await removeAsync(input.legacyStore, key)
      continue
    }
    await input.current.setItem(input.key, next)
    await input.legacyStore.removeItem(key)
    return next
  }

  return null
}

function workspaceStorage(dir: string) {
  const head = (dir.slice(0, 12) || "workspace").replace(/[^a-zA-Z0-9._-]/g, "-")