paypal-spotlight/utils/CacheConf.js

A smart launcher for PayPal.

const path = require('path')
const Conf = require('conf')
const { utils } = require('dext-core-utils')
const { IS_DEV } = require('../app/constants')
const rimraf = require('rimraf')

const { DEXT_PATH } = utils.paths

// implementation by sindresorhus - https://github.com/sindresorhus/alfy/blob/master/lib/cache-conf.js
module.exports = class extends Conf {
  static deleteCacheDirectory() {
    const cacheDir = path.resolve(DEXT_PATH, 'cache')
    rimraf(cacheDir, err => {
      if (err && IS_DEV) {
        throw err
      }
    })
  }

  constructor(opts) {
    const o = Object.assign({}, opts)
    o.cwd = path.resolve(DEXT_PATH, 'cache')
    super(o)
  }

  /**
   * @param {String} key
   * @return {Boolean}
   */
  get(key) {
    if (this.isExpired(key)) {
      super.delete(key)
      return null
    }
    const item = super.get(key)
    return item && item.data
  }

  /**
   * @param {String} key
   * @param {Any} val
   * @param {Object} opts
   */
  set(key, val, opts) {
    // const o = opts || { maxAge: 900000 }; // 15 minute default cache
    const o = opts || { maxAge: 0 } // disable
    super.set(key, {
      timestamp: o.maxAge && Date.now() + o.maxAge,
      data: val,
    })
  }

  /**
   * @param {String} key
   * @return {Boolean}
   */
  has(key) {
    // No cache for dev environment
    if (IS_DEV) {
      return false
    }

    if (!super.has(key)) {
      return false
    }
    if (this.isExpired(key)) {
      super.delete(key)
      return false
    }
    return true
  }

  /**
   * @param {String} key
   * @return {Boolean}
   */
  isExpired(key) {
    const item = super.get(key)
    return item && item.timestamp && item.timestamp < Date.now()
  }
}