Function readCurrent

packages/app/src/utils/persist.ts:216–231

(input: {
  storage: SyncStorage
  key: string
  defaults: unknown
  migrate?: (value: unknown) => unknown
})

}

function readCurrent(input: {
  storage: SyncStorage
  key: string
  defaults: unknown
  migrate?: (value: unknown) => unknown
}) {
  const raw = input.storage.getItem(input.key)
  if (raw === null) return
  const next = normalize(input.defaults, raw, input.migrate)
  if (next === undefined) {
    input.storage.removeItem(input.key)
    return null
  }
  if (raw !== next) input.storage.setItem(input.key, next)
  return next
}

function migrateLegacy(input: {
  current: SyncStorage