/**
   * Get cookie from request.
   *
   * @param  {Object} req
   * @param  {String} key
   * @return {String|undefined}
   */
  export function cookieFromRequest (req, key) {
    if (!req.headers.cookie) {
      return
    }
  
    const cookie = req.headers.cookie.split(';').find(
      c => c.trim().startsWith(`${key}=`)
    )
  
    if (cookie) {
      return cookie.split('=')[1]
    }
  }
  
  /**
   * https://router.vuejs.org/en/advanced/scroll-behavior.html
   */
  export function scrollBehavior (to, from, savedPosition) {
    if (savedPosition) {
      return savedPosition
    }
  
    let position = {}
  
    if (to.matched.length < 2) {
      position = { x: 0, y: 0 }
    } else if (to.matched.some(r => r.components.default.options.scrollToTop)) {
      position = { x: 0, y: 0 }
    } if (to.hash) {
      position = { selector: to.hash }
    }
  
    return position
  }
  
  /**
   * Deep copy the given object.
   *
   * @param  {Object} obj
   * @return {Object}
   */
  export function deepCopy (obj) {
    if (obj === null || typeof obj !== 'object') {
      return obj
    }
  
    const copy = Array.isArray(obj) ? [] : {}
  
    Object.keys(obj).forEach((key) => {
      copy[key] = deepCopy(obj[key])
    })
  
    return copy
  }
  
  /**
   * If the given value is not an array, wrap it in one.
   *
   * @param  {Any} value
   * @return {Array}
   */
  export function arrayWrap (value) {
    return Array.isArray(value) ? value : [value]
  }
  
  export function passwordChecker () {
    return {
      strong: new RegExp('^(?=.*[a-z])(?=.*[A-Z])(?=.*[0-9])(?=.*[!@#$%^&*])(?=.{8,})'),
      medium: new RegExp('^(((?=.*[a-z])(?=.*[A-Z]))|((?=.*[a-z])(?=.*[0-9]))|((?=.*[A-Z])(?=.*[0-9])))(?=.{6,})')
    }
  }
  
  export function formatDateISO8601 (date) {
    if (Object.prototype.toString.call(date) === '[object Date]') {
      return date.getFullYear() + '-' + (date.getMonth() + 1) + '-' + date.getDate()
    }
    return null
  }
  
  export function formatDate (date) {
    if (Object.prototype.toString.call(date) === '[object Date]') {
      return date.getDate() + '/' + (date.getMonth() + 1) + '/' + date.getFullYear()
    }
    return null
  }
  
  export function localeArray2Assoc (arr, keyArg = 'value', valueArg = 'text') {
    const ret = []
    if (arr) {
      for (const key in arr) {
        ret.push({
          [keyArg]: key,
          [valueArg]: arr[key]
        })
      }
    }
    return ret
  }
  
  export function debounce (fn, time) {
    let timeout
  
    return function () {
      const functionCall = () => fn.apply(this, arguments)
  
      clearTimeout(timeout)
      timeout = setTimeout(functionCall, time)
    }
  }
  
  export function getAge (birthDate) {
    const ageDifMs = Date.now() - new Date(birthDate).getTime()
    const ageDate = new Date(ageDifMs) // milliseconds from epoch
    return Math.abs(ageDate.getUTCFullYear() - 1970)
  }