SZHY2.0/src/utils/util.js

export function timeFix () {
  const time = new Date()
  const hour = time.getHours()
  return hour < 9 ? '早上好' : hour <= 11 ? '上午好' : hour <= 13 ? '中午好' : hour < 20 ? '下午好' : '晚上好'
}

export function welcome () {
  const arr = ['休息一会儿吧', '准备吃什么呢?', '要不要打一把 DOTA', '我猜你可能累了']
  const index = Math.floor(Math.random() * arr.length)
  return arr[index]
}

/**
 * 触发 window.resize
 */
export function triggerWindowResizeEvent () {
  const event = document.createEvent('HTMLEvents')
  event.initEvent('resize', true, true)
  event.eventType = 'message'
  window.dispatchEvent(event)
}

export function handleScrollHeader (callback) {
  let timer = 0

  let beforeScrollTop = window.pageYOffset
  callback = callback || function () {}
  window.addEventListener(
    'scroll',
    event => {
      clearTimeout(timer)
      timer = setTimeout(() => {
        let direction = 'up'
        const afterScrollTop = window.pageYOffset
        const delta = afterScrollTop - beforeScrollTop
        if (delta === 0) {
          return false
        }
        direction = delta > 0 ? 'down' : 'up'
        callback(direction)
        beforeScrollTop = afterScrollTop
      }, 50)
    },
    false
  )
}

export function isIE () {
  const bw = window.navigator.userAgent
  const compare = (s) => bw.indexOf(s) >= 0
  const ie11 = (() => 'ActiveXObject' in window)()
  return compare('MSIE') || ie11
}

/**
 * Remove loading animate
 * @param id parent element id or class
 * @param timeout
 */
export function removeLoadingAnimate (id = '', timeout = 1500) {
  if (id === '') {
    return
  }
  setTimeout(() => {
    document.body.removeChild(document.getElementById(id))
  }, timeout)
}

/**
 * 随机生成数字
 * @param min 最小值
 * @param max 最大值
 * @return int 生成后的数字
 */
export function randomNumber (min, max) {
  return Math.floor(Math.random() * (max - min + 1) + min)
}

/**
 * 随机生成字符串
 * @param length 字符串的长度
 * @param chats 可选字符串区间（只会生成传入的字符串中的字符）
 * @return string 生成的字符串
 */
export function randomString (length, chats) {
  if (!length) length = 1
  if (!chats) chats = '0123456789qwertyuioplkjhgfdsazxcvbnm'
  let str = ''
  for (let i = 0; i < length; i++) {
    const num = randomNumber(0, chats.length - 1)
    str += chats[num]
  }
  return str
}

/**
 * 随机生成uuid
 * @return string 生成的uuid
 */
export function randomUUID () {
  const chats = '0123456789abcdef'
  return randomString(32, chats)
}
/**
 * json对象单层,转换url参数
 * @param {*} paramObj
 */
export function formateObjToParamStr (paramObj) {
  const sdata = []
  for (const attr in paramObj) {
    sdata.push(`${attr} = ${filter(paramObj[attr])}`)
  }
  return sdata.join('&')
}
// 过滤特殊符号
function filter (str) {
  // 特殊字符转义
  str += '' // 隐式转换
  str = str.replace(/%/g, '%25')
  str = str.replace(/\+/g, '%2B')
  str = str.replace(/ /g, '%20')
  str = str.replace(/\//g, '%2F')
  str = str.replace(/\?/g, '%3F')
  str = str.replace(/&/g, '%26')
  str = str.replace(/=/g, '%3D')
  str = str.replace(/#/g, '%23')
  return str
}