112 lines
3.9 KiB
JavaScript
112 lines
3.9 KiB
JavaScript
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const { isPlainObject } = require("./utils")
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/**
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*
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* JSON.stringify在将一个JSON转化为字符串时会对字符串里面的\t等转义符进行再次转义
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* 导致在使用包含\t等转义符为key时会出现问题
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*
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*
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* @param {*} obj
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* @returns
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*/
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function escape(str){
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return str.replaceAll("\t","\\t")
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.replaceAll("\n","\\n")
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.replaceAll("\b","\\b")
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.replaceAll("\r","\\r")
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.replaceAll("\f","\\f")
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.replaceAll("\\","\\\\")
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.replaceAll("\'","\\'")
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.replaceAll('\"','\\"')
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.replaceAll('\v','\\v')
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}
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/**
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* 获取字符串的长度，中文算两个字符
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* @param {*} s
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* @returns
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*/
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function getStringWidth(s){
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let str = String(s)
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var realLength = 0, len = str.length, charCode = -1;
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for (var i = 0; i < len; i++) {
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charCode = str.charCodeAt(i);
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if (charCode >= 0 && charCode <= 128) realLength += 1;
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else realLength += 2;
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}
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return realLength;
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}
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function objectToString(obj,{indent=4,alignKey=true}={}){
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function nodeToString(node,level,last=false){
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let results = [],beginChar = "",endChar = ""
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level++
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if(Array.isArray(node)){
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beginChar = "[\n"
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node.forEach((value,index)=>{
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const isLastItem = index ===node.length-1
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let item = value
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if(Array.isArray(value) || isPlainObject(value)){
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item = nodeToString(value, level,isLastItem)
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}else if(typeof(value)==="string"){
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item = `"${escape(value)}"`
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}else if(typeof(value)==="number"){
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item = value.toString()
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}else if(typeof(value)==="boolean"){
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item = value.toString()
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}
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// 如果最后一项
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if(!isLastItem){
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item = item+","
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}else{
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item = item+"\n"
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}
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results.push(item)
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})
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endChar =" ".repeat((level-1) * indent) + ( last ? "]" : "]")
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return beginChar + results.map(item=>{
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return `${" ".repeat(level * indent)}${item}`
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}).join("\n") + endChar
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}else if(isPlainObject(node)){
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beginChar = "{\n"
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const length = Object.keys(node).length
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const indentSpace = " ".repeat(level * indent)
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let alignIndent = 0
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Object.entries(node).forEach(([key,value],index)=>{
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const isLastItem = index ===length-1
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alignIndent = Math.max(getStringWidth(key),alignIndent)
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let item = [`${indentSpace}"${escape(key)}"`,value]
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if(Array.isArray(value) || isPlainObject(value)){
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item[1] = nodeToString(value, level,isLastItem)
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}else if(typeof(value)==="string"){
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item[1] = `"${escape(value)}"`
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}else if(typeof(value)==="number"){
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item[1] = `${value.toString()}`
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}else if(typeof(value)==="boolean"){
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item[1] = `${value.toString()}`
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}
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// 如果最后一项
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if(!isLastItem){
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item[1] = item[1]+","
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}else{
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item[1] = item[1]+"\n"
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}
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results.push(item)
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})
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endChar =" ".repeat((level-1) * indent) + ( last ? "}" : "}")
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return beginChar + results.map(item=>{
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if(alignKey){
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return `${item[0]}${ " ".repeat(alignIndent-getStringWidth(item[0].trim())+2)}: ${item[1]}`
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}else{
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return `${item[0]}: ${item[1]}`
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}
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}).join("\n") + endChar
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}
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}
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return nodeToString(obj,0,true)
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}
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module.exports = {
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objectToString,
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getStringWidth
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}
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