@vovkasm/redux-persist/src/purgeStoredState.js

persist and rehydrate redux stores

import { KEY_PREFIX } from './constants'

export default function purgeStoredState (config, keys) {
  const storage = config.storage
  const keyPrefix = config.keyPrefix !== undefined ? config.keyPrefix : KEY_PREFIX

  // basic validation
  if (Array.isArray(config)) throw new Error('redux-persist: purgeStoredState requires config as a first argument (found array). An array of keys is the optional second argument.')
  if (!storage) throw new Error('redux-persist: config.storage required in purgeStoredState')

  if (typeof keys === 'undefined') { // if keys is not defined, purge all keys
    return new Promise((resolve, reject) => {
      storage.getAllKeys((err, allKeys) => {
        if (err) {
          if (process.env.NODE_ENV !== 'production') console.warn('redux-persist: error during purgeStoredState in storage.getAllKeys')
          reject(err)
        } else {
          resolve(purgeStoredState(config, allKeys.filter((key) => key.indexOf(keyPrefix) === 0).map((key) => key.slice(keyPrefix.length))))
        }
      })
    })
  } else { // otherwise purge specified keys
    return Promise.all(keys.map((key) => {
      return storage.removeItem(`${keyPrefix}${key}`, warnIfRemoveError(key))
    }))
  }
}

function warnIfRemoveError (key) {
  return function removeError (err) {
    if (err && process.env.NODE_ENV !== 'production') { console.warn('Error storing data for key:', key, err) }
  }
}