import FileSaver from 'file-saver'
import moment from 'moment'
// 字节单位转换
const getfilesize = (size) => {
if (!size) { return '' }
var num = 1024.00 // byte
if (size < num) { return size + 'B' }
if (size < Math.pow(num, 2)) { return (size / num).toFixed(2) + 'KB' } // kb
if (size < Math.pow(num, 3)) { return (size / Math.pow(num, 2)).toFixed(2) + 'MB' } // M
if (size < Math.pow(num, 4)) { return (size / Math.pow(num, 3)).toFixed(2) + 'GB' } // G
return (size / Math.pow(num, 4)).toFixed(2) + 'TB' // T
}
// Math.pow(x,y) //返回 x 的 y 次幂的值
// NumberObject.toFixed(num) //可把 Number 四舍五入为指定小数位数的数字
// 时间戳转时间
const getdate = (val, type) => {
// let date = new Date(val)
// let Y = date.getFullYear()
// let M = (date.getMonth() + 1 < 10 ? '0' + (date.getMonth() + 1) : date.getMonth() + 1)
// let D = (date.getDate() + 1 < 10 ? '0' + date.getDate() : date.getDate())
// let h = (date.getHours() + 1 < 10 ? '0' + date.getHours() : date.getHours())
// let m = (date.getMinutes() + 1 < 10 ? '0' + date.getMinutes() : date.getMinutes())
// let s = (date.getSeconds() + 1 < 10 ? '0' + date.getSeconds() : date.getSeconds())
// return Y + '-' + M + '-' + D + ' ' + h + ':' + m + ':' + s
if (!val) return ''
// 兼容ie
return moment(val).format('YYYY-MM-DD HH:mm:ss')
}
// 秒转时分秒
const formatSeconds = (value) => {
// var secondTime = parseInt(value)// 秒
var secondTime = value // 秒
var minuteTime = 0// 分
var hourTime = 0// 小时
if (secondTime > 60) { // 如果秒数大于60，将秒数转换成整数
// 获取分钟，除以60取整数，得到整数分钟
minuteTime = parseInt(secondTime / 60)
// 获取秒数，秒数取佘，得到整数秒数
// secondTime = parseInt(secondTime % 60)
secondTime = secondTime % 60
// 如果分钟大于60，将分钟转换成小时
if (minuteTime > 60) {
// 获取小时，获取分钟除以60，得到整数小时
hourTime = parseInt(minuteTime / 60)
// 获取小时后取佘的分，获取分钟除以60取佘的分
minuteTime = parseInt(minuteTime % 60)
}
}
var result = '' + secondTime + '秒'
let result2 = '' + parseInt(secondTime) + '秒'
if (minuteTime > 0) {
result = '' + parseInt(minuteTime) + '分' + result2
}
if (hourTime > 0) {
result = '' + parseInt(hourTime) + '小时' + result2
}
return result
}
// 转树形结构
const getTree = (rsdata) => {
const getChilds = (menuPid) => {
const childArr = []
rsdata.forEach((item) => {
if (item.menuPid === menuPid) {
childArr.push(item)
item.children = getChilds(item.id)
}
})
if (childArr.length === 0) return null
return childArr
}
return getChilds(0)
}
// 数组和对象去掉无效值
const removeEmptyField = obj => {
let newObj = {}
if (Array.prototype.isPrototypeOf(obj)) {
// 去掉数组中元素为数字0、false、null、undefined、NaN、''的情况，不排除元素'0',' '
newObj = []
obj.forEach(item => {
if (item) {
newObj.push(item)
}
})
} else if (obj instanceof Object) {
// 去掉对象中值为''、null、undefined的情况，不排除值为'0',' ', NaN, false
for (var attr in obj) {
if (obj.hasOwnProperty(attr) && obj[attr] !== '' && obj[attr] !== null && obj[attr] !== undefined) {
if (obj[attr] instanceof Object) {
newObj[attr] = removeEmptyField(obj[attr])
} else if (typeof obj[attr] === 'string' && ((obj[attr].indexOf('{') > -1 && obj[attr].indexOf('}') > -1) || (obj[attr].indexOf('[') > -1 && obj[attr].indexOf(']') > -1))) {
try {
var attrObj = JSON.parse(obj[attr])
if (attrObj instanceof Object) {
newObj[attr] = removeEmptyField(attrObj)
}
} catch (e) {
newObj[attr] = obj[attr]
}
} else {
newObj[attr] = obj[attr]
}
}
}
}
return newObj
}
// 数组去重 [1, 1, 2, 2, 2, 3] ===> [1,2,3]
const unique = (arr) => {
var x = new Set(arr)
return [...x]
}
/**
* 文件下载,minxin方式
*/
const downloadFile = {
methods: {
downloadGet (url) {
const self = this
const el = document.getElementById('fileIframe')
if (el) {
document.body.removeChild(el)
}
const iframe = document.createElement('iframe')
iframe.style.display = 'none'
iframe.src = url
iframe.setAttribute('id', 'down-file-iframe')
iframe.onload = function () {
const ele = iframe.contentWindow.document.body
if (ele) {
try {
const data = JSON.parse(ele.innerText)
if (data && data.code) {
self.$message.error(data.message || '您要下载的文件不存在！')
}
} catch (error) {
self.$message.error('您要下载的文件不存在！')
}
}
document.body.removeChild(iframe)
}
document.body.appendChild(iframe)
},
downloadPost (fileName, content) {
// 处理下载错误
if (content.type === 'application/json') {
const fr = new FileReader()
fr.readAsText(content)
fr.addEventListener('loadend', () => {
try {
const errRes = JSON.parse(fr.result)
if (errRes && errRes.message) {
this.$messageBig({
message: errRes.message || '下载文件失败!!!',
type: 'error'
})
}
} catch (error) {
this.$messageBig({
message: '下载文件失败!!!',
type: 'error'
})
}
})
return
}
// 下载文件
if ('msSaveBlob' in navigator) { // 对IE和Edge的兼容
window.navigator.msSaveBlob(content, fileName)
} else {
// eslint-disable-next-line standard/object-curly-even-spacing
const blob = new Blob([content], { type: 'text/plain;charset=utf-8' })
FileSaver.saveAs(blob, fileName)
}
},
downloadByLink (url, fileName) {
const a = document.createElement('a')
a.style = 'display: none'
a.href = url
if (fileName) {
a.download = fileName
}
document.body.appendChild(a)
a.click()
setTimeout(() => {
document.body.removeChild(a)
}, 5)
},
downloadByForm (url = '', method = 'get', params = null) {
const $body = document.getElementsByTagName('body')[0]
const form = document.createElement('form')
form.action = url
form.method = method
Object.keys(params).forEach((key) => {
const input = document.createElement('input')
input.type = 'hidden'
input.name = key
input.value = params[key]
form.appendChild(input)
})
$body.appendChild(form)
form.submit()
}
}
}
const isIE = () => {
// const navigatorName = 'Microsoft Internet Explorer'
let flag = false
if (!!window.ActiveXObject || 'ActiveXObject' in window) {
flag = true
}
return flag
}
/**
* 判断浏览器是否支持某一个CSS3属性
* @param {String} 属性名称
* @return {Boolean} true/false
*/
function supportCss3 (style) {
var prefix = ['webkit', 'Moz', 'ms', 'o']
var i
var humpString = []
var htmlStyle = document.documentElement.style
var _toHumb = function (string) {
return string.replace(/-(\w)/g, function ($0, $1) {
return $1.toUpperCase()
})
}
for (i in prefix) { humpString.push(_toHumb(prefix[i] + '-' + style)) }
humpString.push(_toHumb(style))
for (i in humpString) { if (humpString[i] in htmlStyle) return true }
return false
}
// 判断是否小于ie10
const isLessThanIE10 = () => {
let flag = false
// const d = document.documentElement.style
// if (('flexWrap' in d) || ('WebkitFlexWrap' in d) || ('msFlexWrap' in d)) {
// flag = false
// }
flag = supportCss3('flex')
return !flag
}
export {
getdate, formatSeconds, getTree, removeEmptyField, unique, downloadFile, isIE, isLessThanIE10, getfilesize
}