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/**
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* @description: 工具类
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* @fileName: index
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* @author: luhuixu
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* @date: 2023/5/27-13:36
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* @version: V1.0.0
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**/
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/**
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* @description 格式化时间
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* @param time
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* @param cFormat
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* @returns {string|null}
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*/
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export function parseTime(time, cFormat) {
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if (!time) return '-'
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if (arguments.length === 0) {
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return null
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}
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const format = cFormat || '{y}-{m}-{d} {h}:{i}:{s}'
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let date
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if (typeof time === 'object') {
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date = time
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} else {
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if (typeof time === 'string' && /^[0-9]+$/.test(time)) {
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time = parseInt(time)
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}
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if (typeof time === 'number' && time.toString().length === 10) {
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time = time * 1000
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}
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date = new Date(time)
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}
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const formatObj = {
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y: date.getFullYear(),
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m: date.getMonth() + 1,
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d: date.getDate(),
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h: date.getHours(),
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i: date.getMinutes(),
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s: date.getSeconds(),
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a: date.getDay()
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}
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const time_str = format.replace(/{(y|m|d|h|i|s|a)+}/g, (result, key) => {
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let value = formatObj[key]
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if (key === 'a') {
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return ['日', '一', '二', '三', '四', '五', '六'][value]
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}
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if (result.length > 0 && value < 10) {
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value = '0' + value
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}
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return value || 0
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})
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return time_str
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}
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/**
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* @description 根据状态返回对应tag 值
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* @param str
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* @returns {string}
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*/
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export function backTagStatusWithString(str) {
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let tagType = ''
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switch (str) {
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case '1':
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// 待发布
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tagType = 'danger'
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break
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case '2':
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// 报名中
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tagType = 'primary'
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break
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case '3':
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// 待制定
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tagType = 'warning'
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break
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case '4':
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// 进行中
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tagType = 'success'
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break
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case '5':
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// 批阅中
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tagType = 'primary'
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break
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case '6':
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// 待公示
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tagType = 'warning'
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break
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case '7':
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// 待归档
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tagType = 'warning'
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break
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case '8':
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// 已归档
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tagType = 'info'
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break
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case '9':
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// 待批阅
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tagType = 'warning'
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break
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case '10':
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// 待审核
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tagType = 'warning'
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break
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}
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return tagType
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}
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/**
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* @author lhx
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* @description 防抖函数
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* @param val
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* @returns {string}
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*/
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export function debounce(func, delay = 500) {
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let timer
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return function(...args) {
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clearTimeout(timer)
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timer = setTimeout(() => {
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func.call(this, ...args)
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}, delay)
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}
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}
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/**
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* 参数解析：
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* ctx: canvas绘图上下文
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* str: 需要绘制的文本内容
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* draw_width: 绘制后的文字显示宽度
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* lineNum: 最大行数，多出部分用'...'表示， 如果传-1可以达到自动换行效果
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* startX: 绘制文字的起点 X 轴坐标
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* startY: 绘制文字的起点 Y 轴坐标
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* steps: 文字行间距
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* textIndent: 是否首行缩进两个字符
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*/
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export function toFormateStr(ctx, str, draw_width, lineNum, startX, startY, steps, textIndent) {
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var strWidth = ctx.measureText(str).width // 测量文本源尺寸信息（宽度）
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var startpoint = startY; var keyStr = ''; var sreLN = strWidth / draw_width
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// 计算文本源一共能生成多少行
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var liner = Math.ceil(sreLN)
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// 等比缩放测量一行文本显示多少个字符
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const strlen = parseInt(str.length / sreLN)
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// 若文本不足一行，则直接绘制，反之大于传入的最多行数（lineNum）以省略号（...）代替
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if (strWidth < draw_width) {
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ctx.fillText(str, startX, startpoint)
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} else {
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for (var i = 1; i < liner + 1; i++) {
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const startPoint = strlen * (i - 1)
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if (i < lineNum || lineNum === -1) {
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keyStr = str.substr(startPoint, strlen)
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ctx.fillText(keyStr, i === 1 && textIndent ? startX + draw_width / strlen * 2 : startX, startpoint)
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} else {
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keyStr = str.substr(startPoint, strlen - 5) + '...'
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ctx.fillText(keyStr, startX, startpoint)
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break
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}
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startpoint = startpoint + steps
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}
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}
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}
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/**
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* file转base64
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* @param { * } file 图片文件
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* @return {base64}
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*/
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export const fileToBase64 = file => {
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const reader = new FileReader()
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reader.readAsDataURL(file)
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reader.onload = function(e) {
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return e.target.result
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}
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}
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/**
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* base64转 file
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* @param { * } dataurl 图片链接
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* filename 图片名称
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* @return {file}
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*/
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export const base64ImgtoFile = (dataurl, filename = 'file') => {
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const arr = dataurl.split(',')
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const mime = arr[0].match(/:(.*?);/)[1]
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const suffix = mime.split('/')[1]
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// atob : 解码使用 base-64 编码的字符串
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const bstr = window.atob(arr[1])
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let n = bstr.length
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const u8arr = new Uint8Array(n)
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while (n--) {
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u8arr[n] = bstr.charCodeAt(n)
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}
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return new File([u8arr], `${filename}.${suffix}`, {
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type: mime
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})
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}
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/**
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* 树形结构扁平化
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* @param tree 树形结构数据
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* @return []
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*/
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export function treeToArray(tree) {
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var res = []
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for (const item of tree) {
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const { children, ...i } = item
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if (children && children.length) {
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res = res.concat(treeToArray(children))
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}
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res.push(i)
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}
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return res
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}
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/**
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* @author lhx
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* @description 返回树形数据
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* @param val
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* @returns {string}
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*/
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export function jsonToTree(objects, keyName, parentKeyName) {
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if (!keyName) {
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keyName = 'id'
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}
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if (!parentKeyName) {
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parentKeyName = 'parentId'
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}
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// * 先生成parent建立父子关系
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const obj = {}
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objects.forEach((item) => {
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obj[item[keyName]] = item
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})
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const parentList = []
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objects.forEach((item) => {
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// item.hasChildren = false;
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const parent = obj[item[parentKeyName]]
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if (parent) {
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// * 当前项有父节点
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parent.children = parent.children || []
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parent.children.push(item)
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// parent.hasChildren = true;
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} else {
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// * 当前项没有父节点 -> 顶层
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parentList.push(item)
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}
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})
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return parentList
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}
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/**
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* @author lhx
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* @description 迭代方式实现补零
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* @param val
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* @returns {string}
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*/
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export function zeroFill(num, length) {
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for (var len = (num + '').length; len < length; len = num.length) {
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num = '0' + num
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}
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return num
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}
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