microservice / sl-express · Files

/**
 * Created by PanJiaChen on 16/11/18.
 */

/**
 * Parse the time to string
 * @param {(Object|string|number)} time
 * @param {string} cFormat
 * @returns {string | null}
 */
export function parseTime (time, cFormat) {
  if (arguments.length === 0) {
    return null
  }
  const format = cFormat || '{y}-{m}-{d} {h}:{i}:{s}'
  let date
  if (typeof time === 'object') {
    date = time
  } else {
    if ((typeof time === 'string') && (/^[0-9]+$/.test(time))) {
      time = parseInt(time)
    }
    if ((typeof time === 'number') && (time.toString().length === 10)) {
      time = time * 1000
    }
    date = new Date(time)
  }
  const formatObj = {
    y: date.getFullYear(),
    m: date.getMonth() + 1,
    d: date.getDate(),
    h: date.getHours(),
    i: date.getMinutes(),
    s: date.getSeconds(),
    a: date.getDay()
  }
  const time_str = format.replace(/{([ymdhisa])+}/g, (result, key) => {
    const value = formatObj[key]
    // Note: getDay() returns 0 on Sunday
    if (key === 'a') { return ['日', '一', '二', '三', '四', '五', '六'][value] }
    return value.toString().padStart(2, '0')
  })
  return time_str
}

/**
 * @param {number} time
 * @param {string} option
 * @returns {string}
 */
export function formatTime (time, option) {
  if (('' + time).length === 10) {
    time = parseInt(time) * 1000
  } else {
    time = +time
  }
  const d = new Date(time)
  const now = Date.now()

  const diff = (now - d) / 1000

  if (diff < 30) {
    return '刚刚'
  } else if (diff < 3600) {
    // less 1 hour
    return Math.ceil(diff / 60) + '分钟前'
  } else if (diff < 3600 * 24) {
    return Math.ceil(diff / 3600) + '小时前'
  } else if (diff < 3600 * 24 * 2) {
    return '1天前'
  }
  if (option) {
    return parseTime(time, option)
  } else {
    return (
      d.getMonth() +
      1 +
      '月' +
      d.getDate() +
      '日' +
      d.getHours() +
      '时' +
      d.getMinutes() +
      '分'
    )
  }
}

/**
 * @param {string} url
 * @returns {Object}
 */
export function param2Obj (url) {
  const search = url.split('?')[1]
  if (!search) {
    return {}
  }
  return JSON.parse(
    '{"' +
    decodeURIComponent(search)
      .replace(/"/g, '\\"')
      .replace(/&/g, '","')
      .replace(/=/g, '":"')
      .replace(/\+/g, ' ') +
    '"}'
  )
}

export function randomNum (len, radix) {
  const chars = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'.split('')
  const uuid = []
  radix = radix || chars.length

  if (len) {
    // Compact form
    for (let i = 0; i < len; i++) uuid[i] = chars[0 | Math.random() * radix]
  } else {
    // rfc4122, version 4 form
    let r

    // rfc4122 requires these characters
    uuid[8] = uuid[13] = uuid[18] = uuid[23] = '-'
    uuid[14] = '4'

    // Fill in random data.  At i==19 set the high bits of clock sequence as
    // per rfc4122, sec. 4.1.5
    for (let i = 0; i < 36; i++) {
      if (!uuid[i]) {
        r = 0 | Math.random() * 16
        uuid[i] = chars[(i === 19) ? (r & 0x3) | 0x8 : r]
      }
    }
  }
  return uuid.join('') + new Date().getTime()
}

// 时间戳转时间  年/月/日 时:分:秒
export function getHMS (timestamp) {
  var date = new Date(timestamp) // 时间戳为10位需*1000，时间戳为13位的话不需乘1000
  var Y = date.getFullYear() + '-'
  var M = (date.getMonth() + 1 < 10 ? '0' + (date.getMonth() + 1) : date.getMonth() + 1) + '-'
  var D = (date.getDate() < 10 ? '0' + (date.getDate()) : date.getDate()) + ' '

  var h = (date.getHours() < 10 ? '0' + (date.getHours()) : date.getHours()) + ':'
  var m = (date.getMinutes() < 10 ? '0' + (date.getMinutes()) : date.getMinutes()) + ':'
  var s = (date.getSeconds() < 10 ? '0' + (date.getSeconds()) : date.getSeconds())
  return Y + M + D + h + m + s
}

export function getNotNullParams (obj) {
  for (const key in obj) {
    if (!obj[key]) {
      delete obj[key]
    }
  }
  return { ...obj }
}

// 节流
export function debounce (fn, delay) {
  // last为上一次触发回调的时间, timer是定时器
  let last = 0; let timer = null
  // 将throttle处理结果当作函数返回

  return function () {
    // 保留调用时的this上下文
    const context = this
    // 保留调用时传入的参数
    const args = arguments
    // 记录本次触发回调的时间
    const now = +new Date()

    // 判断上次触发的时间和本次触发的时间差是否小于时间间隔的阈值

    if (now - last < delay) {
      // 如果时间间隔小于我们设定的时间间隔阈值，则为本次触发操作设立一个新的定时器
      clearTimeout(timer)
      timer = setTimeout(function () {
        last = now
        fn.apply(context, args)
      }, delay)
    } else {
      // 如果时间间隔超出了我们设定的时间间隔阈值，那就不等了，无论如何要反馈给用户一次响应
      last = now
      fn.apply(context, args)
    }
  }
}
// 处理时间(将时间转为当前时间距离当日0点0分的分钟差值)
export function handleDate (val) {
  const min = Number(
    (
      ((val / 60).toFixed(2) - parseInt((val / 60).toFixed(2))) *
      60
    ).toFixed() === '0' ? '00' : (
      ((val / 60).toFixed(2) - parseInt((val / 60).toFixed(2))) *
      60
    ).toFixed()
  )
  return (
    String(parseInt((val / 60).toFixed(2))) +
    ':' +
    String(
      min >= 10 ? min : '0' + min
    )
  )
}

// 百度地图坐标转高德地图坐标：
export function toAMap (lng, lat) {
  const X_PI = Math.PI * 3000.0 / 180.0
  const x = lng - 0.0065
  const y = lat - 0.006
  const z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * X_PI)
  const theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * X_PI)
  const amap_lng = z * Math.cos(theta)
  const amap_lat = z * Math.sin(theta)
  return {
    longitude: amap_lng,
    latitude: amap_lat
  }
}

// 高德地图坐标转百度地图坐标：

export function toBaiduMap (lng, lat) {
  const X_PI = Math.PI * 3000.0 / 180.0;
  let x = lng;
  let y = lat;
  let z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * X_PI);
  let theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * X_PI);
  let bd_lng = z * Math.cos(theta) + 0.0065;
  let bd_lat = z * Math.sin(theta) + 0.006;
  return {
    lng: bd_lng,
    lat: bd_lat
  };
}