item-management-web/src/utils/index.js

/**
 * 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 getQueryObject(url) {
  url = url == null ? window.location.href : url
  const search = url.substring(url.lastIndexOf('?') + 1)
  const obj = {}
  const reg = /([^?&=]+)=([^?&=]*)/g
  search.replace(reg, (rs, $1, $2) => {
    const name = decodeURIComponent($1)
    let val = decodeURIComponent($2)
    val = String(val)
    obj[name] = val
    return rs
  })
  return obj
}

/**
 * @param {string} input value
 * @returns {number} output value
 */
export function byteLength(str) {
  // returns the byte length of an utf8 string
  let s = str.length
  for (var i = str.length - 1; i >= 0; i--) {
    const code = str.charCodeAt(i)
    if (code > 0x7f && code <= 0x7ff) s++
    else if (code > 0x7ff && code <= 0xffff) s += 2
    if (code >= 0xDC00 && code <= 0xDFFF) i--
  }
  return s
}

/**
 * @param {Array} actual
 * @returns {Array}
 */
export function cleanArray(actual) {
  const newArray = []
  for (let i = 0; i < actual.length; i++) {
    if (actual[i]) {
      newArray.push(actual[i])
    }
  }
  return newArray
}

/**
 * @param {Object} json
 * @returns {Array}
 */
export function param(json) {
  if (!json) return ''
  return cleanArray(
    Object.keys(json).map(key => {
      if (json[key] === undefined) return ''
      return encodeURIComponent(key) + '=' + encodeURIComponent(json[key])
    })
  ).join('&')
}

/**
 * @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, ' ') +
      '"}'
  )
}

/**
 * @param {string} val
 * @returns {string}
 */
export function html2Text(val) {
  const div = document.createElement('div')
  div.innerHTML = val
  return div.textContent || div.innerText
}

/**
 * Merges two objects, giving the last one precedence
 * @param {Object} target
 * @param {(Object|Array)} source
 * @returns {Object}
 */
export function objectMerge(target, source) {
  if (typeof target !== 'object') {
    target = {}
  }
  if (Array.isArray(source)) {
    return source.slice()
  }
  Object.keys(source).forEach(property => {
    const sourceProperty = source[property]
    if (typeof sourceProperty === 'object') {
      target[property] = objectMerge(target[property], sourceProperty)
    } else {
      target[property] = sourceProperty
    }
  })
  return target
}

/**
 * @param {HTMLElement} element
 * @param {string} className
 */
export function toggleClass(element, className) {
  if (!element || !className) {
    return
  }
  let classString = element.className
  const nameIndex = classString.indexOf(className)
  if (nameIndex === -1) {
    classString += '' + className
  } else {
    classString =
      classString.substr(0, nameIndex) +
      classString.substr(nameIndex + className.length)
  }
  element.className = classString
}

/**
 * @param {string} type
 * @returns {Date}
 */
export function getTime(type) {
  if (type === 'start') {
    return new Date().getTime() - 3600 * 1000 * 24 * 90
  } else {
    return new Date(new Date().toDateString())
  }
}

/**
 * @param {Function} func
 * @param {number} wait
 * @param {boolean} immediate
 * @return {*}
 */
export function debounce(func, wait, immediate) {
  let timeout, args, context, timestamp, result

  const later = function() {
    // 据上一次触发时间间隔
    const last = +new Date() - timestamp

    // 上次被包装函数被调用时间间隔 last 小于设定时间间隔 wait
    if (last < wait && last > 0) {
      timeout = setTimeout(later, wait - last)
    } else {
      timeout = null
      // 如果设定为immediate===true，因为开始边界已经调用过了此处无需调用
      if (!immediate) {
        result = func.apply(context, args)
        if (!timeout) context = args = null
      }
    }
  }

  return function(...args) {
    context = this
    timestamp = +new Date()
    const callNow = immediate && !timeout
    // 如果延时不存在，重新设定延时
    if (!timeout) timeout = setTimeout(later, wait)
    if (callNow) {
      result = func.apply(context, args)
      context = args = null
    }

    return result
  }
}

/**
 * This is just a simple version of deep copy
 * Has a lot of edge cases bug
 * If you want to use a perfect deep copy, use lodash's _.cloneDeep
 * @param {Object} source
 * @returns {Object}
 */
export function deepClone(source) {
  if (!source && typeof source !== 'object') {
    throw new Error('error arguments', 'deepClone')
  }
  const targetObj = source.constructor === Array ? [] : {}
  Object.keys(source).forEach(keys => {
    if (source[keys] && typeof source[keys] === 'object') {
      targetObj[keys] = deepClone(source[keys])
    } else {
      targetObj[keys] = source[keys]
    }
  })
  return targetObj
}

/**
 * @param {Array} arr
 * @returns {Array}
 */
export function uniqueArr(arr) {
  return Array.from(new Set(arr))
}

/**
 * @returns {string}
 */
export function createUniqueString() {
  const timestamp = +new Date() + ''
  const randomNum = parseInt((1 + Math.random()) * 65536) + ''
  return (+(randomNum + timestamp)).toString(32)
}

/**
 * Check if an element has a class
 * @param {HTMLElement} elm
 * @param {string} cls
 * @returns {boolean}
 */
export function hasClass(ele, cls) {
  return !!ele.className.match(new RegExp('(\\s|^)' + cls + '(\\s|$)'))
}

/**
 * Add class to element
 * @param {HTMLElement} elm
 * @param {string} cls
 */
export function addClass(ele, cls) {
  if (!hasClass(ele, cls)) ele.className += ' ' + cls
}

/**
 * Remove class from element
 * @param {HTMLElement} elm
 * @param {string} cls
 */
export function removeClass(ele, cls) {
  if (hasClass(ele, cls)) {
    const reg = new RegExp('(\\s|^)' + cls + '(\\s|$)')
    ele.className = ele.className.replace(reg, ' ')
  }
}

/*
* 解析地址栏参数
*
* @method getQueryObj
*
* @param
*
* @return {Object} 返回query参数对象
*
* */
export function getQueryObj () {
  let href = window.location.href
  let query = href.substr(href.indexOf('?') + 1)
  let arr = query.split('&')
  let queryObj = {}

  for (let i = 0; i < arr.length; i++) {
    let keyVal = arr[i].split('=')

    queryObj[keyVal[0]] = keyVal[1]
  }
  return queryObj
}

/*
* String过长，中间显示点
*
* @method interceptString
*
* @param {String} 目标字符串
* @param {Number} 目标长度后开始截取，否则返回原String
* @param {Number} String开始保留长度 1开始
* @param {Number} String结尾保留长度
*
* @return {String} xxx...xxx 或 xxx
* */
export function interceptString (str, len, m, n) {
  if ((typeof str === 'string') && (typeof len === 'number') &&
    (typeof m === 'number') && (typeof n === 'number')) {
    if (len <= m + n) {
      throw new Error('长度参数有误，开始截取长度必须大于前后保留长度的和')
    }
    if (str.length > len) {
      return str.substring(0, m) + '...' + str.substring(str.length - n)
    } else {
      return str
    }
  } else {
    throw new Error('interceptString方法，参数类型错误')
  }
}

/*
* 动态检测浏览器大小
* @method windowWidth
*
* @return {Object} 浏览器宽度
* */
export function windowWH () {
  return {
    screenWidth: window.screen.width, // 屏幕分辨率,宽
    screenHeight: window.screen.height, // 屏幕分辨率,高
    screenAvailWidth: window.screen.availWidth, // 屏幕可用大小
    screenAvailHeight: window.screen.availHeight, // 屏幕可用大小
    clientWidth: document.body.clientWidth, // 网页可见区域宽
    clientHeight: document.body.clientHeight, // 网页可见区域高
    offsetWidth: document.body.offsetWidth, // 网页可见区域宽(包括边线的宽)
    offsetHeight: document.body.offsetHeight, // 网页可见区域高(包括边线的宽)
    scrollWidth: document.body.scrollWidth, // 网页正文全文宽
    scrollHeight: document.body.scrollHeight, // 网页正文全文高
    scrollTop: document.body.scrollTop, // 网页被卷去的高
    scrollLeft: document.body.scrollLeft, // 网页被卷去的左
    WinScreenTop: window.screenTop, // 网页正文部分左
    WinScrollLeft: window.screenLeft,
  }
}

/*
* 对象深拷贝
* @method deepCopy
* @param p {Object} 拷贝对象
* @param c {Object} 可选，拷贝到c对象
* @return {Object} 拷贝对象
* */
export function deepCopy (source) {
  let result = {}

  for (let key in source) {
    result[key] = typeof source[key] === 'object'
      ? deepCopy(source[key])
      : source[key]
  }
  return result
}

export function deepCopyJson (p) {
  return JSON.parse((JSON.stringify(p)))
}

/*
* 判断为数组
* @method isArray
* @param o {all} 判断的对象
* @return {Boolean} 是否为数组
* */
export function isArray (o) {
  return Object.prototype.toString.call(o) === '[object Array]'
}

export function isArray2 (arr) {
  return arr instanceof Array
}

/*
* 判断对象
* @method isJsonObj
* @param o {all} 判断的对象
* @return {Boolean} 是否为对象
* */
export function isJsonObj (o) {
  if (o instanceof Object) {
    return o instanceof Array ? false : true // eslint-disable-line
  } else {
    return false
  }
}

export function arrToStr (arr, attr) { // 对象数组id属性转为字符串[{id: 1},{id, 2}] to '1,2'
  let tempArr = []
  arr.forEach(item => {
    tempArr.push(item[attr])
  })
  return tempArr.join(',')
}

/*
* aBC 转 a_b_c
* */
export function underscoreName (s) {
  if (!s) {
    return null
  }
  return s.replace(/([A-Z])/g, '_$1').toLowerCase()
}

/*
* a_b_c 转 aBC
* */
export function camelName () {
}

/*
* 上个月1号日期
*
* */
export function lastMonthDate () { // 上个月1号
  var Nowdate = new Date()
  var vYear = Nowdate.getFullYear()
  var vMon = Nowdate.getMonth() + 1
  // var vDay = Nowdate.getDate()
  // 每个月的最后一天日期（为了使用月份便于查找，数组第一位设为0）
  // var daysInMonth = new Array(0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31)
  if (vMon === 1) {
    vYear = Nowdate.getFullYear() - 1
    vMon = 12
  } else {
    vMon = vMon - 1
  }
  if (vMon < 10) {
    vMon = '0' + vMon
  }
  var date = vYear + '-' + vMon + '-01'
  // console.log(date)
  return new Date(date)
}