lora-project/server-api/libs/storeObject.js

const StoreObj = (() => {
  let memStore = {}
  let maxAge = 86400000

  /**
   * @param {string} uuid
   * @param {object} obj
   */
  const set = (uuid, obj) => {
    memStore[uuid] = {
      obj,
      age: Date.now() + maxAge
    }
  }

  /**
   * @param {string} uuid
   */
  const get = (uuid) => {
    if (uuid in memStore) {
      let s = memStore[uuid]
      if (Date.now() < s.age) {
        s.age = Date.now() + maxAge
        return s.obj
      } else {
        delete memStore[uuid]
      }
    }
    return null
  }

  /**
   * @param {string} uuid
   */
  const chkKey = (uuid) => {
    if (uuid in memStore) return true
    return false
  }

  /**
   * @param {string} uuid
   */
  const del = (uuid) => {
    if (uuid in memStore) delete memStore[uuid]
  }

  const clear = () => {
    let t = Date.now()
    for (var i in memStore) {
      let s = memStore[i]
      if (s.age < t) delete memStore[i]
    }
  }

  /**
   * @param {string} uuid if not input return all
   */
  const show = (uuid) => {
    if (uuid && uuid in memStore) return memStore[uuid]

    return memStore
  }

  return {
    set,
    get,
    chkKey,
    clear,
    del,
    show
  }
})()

module.exports = StoreObj