保存 JSON 文件以便稍后从中获取其他数据

我希望能够使用新数据保存我的 json 文件，然后调用该数据，以便我可以再次保存新数据。现在它所做的就是，当我调用 JSON 文件数据的任何部分时，保持与我上次手动保存它时相同。 （我确实编辑了一些代码并更好地描述了我的问题）提前谢谢您！这是我的代码，没有错误日志：

const Discord = require('discord.js');
const botconfig = require("./botconfig.json");
const fs = require("fs");
const bot = new Discord.Client();
    bot.on("message", async message => {
        let prefix = botconfig.prefix;
        let messageArray = message.content.split(" ");
        let cmd = messageArray[0];
        let args = messageArray.slice(1);
        console.log(message.member.id)
        var playerFile = require(`./playerData/${message.member.id}.json`);
        if (message.author.bot) return;
        if (message.channel.type === "dm") return;
        if (cmd.charAt(0) === prefix) {
            if(cmd === `${prefix}fc`){
                fs.exists(`./playerData/${message.member.id}.json`, function(exists) {
                    if(exists){
                    let ar = args[0];
                    let ninConsole = args[1];
                    let code = args[2];
                    if(ar === "add" || ar === "remove"){
                        if(code){
                            if(ar === "add"){
                                console.log("Add");
                                if(ninConsole === "switch"){
                                    console.log("Switch " + code); 
                                    let fileContent = `{"switch": "${code}","threeDS": "${playerFile.threeDS}"}`
                                    fs.writeFile(`./playerData/${message.member.id}.json`, fileContent, (err) => {
                                        if (err) {
                                            console.error(err);
                                            return;
                                        };
                                    });
                                }
                                if(ninConsole === "3ds"){
                                    let fileContent = `{"switch": "${playerFile.switch}","threeDS": "${code}"}`
                                    fs.writeFile(`./playerData/${message.member.id}.json`, fileContent, (err) => {
                                        if (err) {
                                            console.error(err);
                                            return;
                                        };
                                    });
                                }
                            }
                            if(ar === "remove"){
                                if(ninConsole === "switch"){
                                    let fileContent = `{"switch": "None","threeDS": "${playerFile.threeDS}"}`
                                    fs.writeFile(`./playerData/${message.member.id}.json`, fileContent, (err) => {
                                        if (err) {
                                            console.error(err);
                                            return;
                                        };
                                    });
                                }
                                if(ninConsole === "3ds"){
                                    let fileContent = `{"switch": "${playerFile.switch}","threeDS": "None"}`
                                    fs.writeFile(`./playerData/${message.member.id}.json`, fileContent, (err) => {
                                        if (err) {
                                            console.error(err);
                                            return;
                                        };
                                    });
                                }
                            }
                        }
                    }
                }else{
                    return;
                }
                });
            }

以下是使用 fs 将数据保存到 JSON 文件的示例：

JSON.parse(fs.readFileSync("./points.json", "utf8"));

这里有一个关于如何使用此代码为不和谐机器人创建积分系统的示例：https://anidiotsguide_old.gitbooks.io/discord-js-bot-guide/content/coding-guides/storing-data-in-a-json-file.html https://anidiotsguide_old.gitbooks.io/discord-js-bot-guide/content/coding-guides/storing-data-in-a-json-file.html

这是此示例的代码：

const Discord = require("discord.js");
const fs = require("fs");
const client = new Discord.Client();

let points = JSON.parse(fs.readFileSync("./points.json", "utf8"));
const prefix = "+";

client.on("message", message => {
  if (!message.content.startsWith(prefix)) return;
  if (message.author.bot) return;

  if (!points[message.author.id]) points[message.author.id] = {
    points: 0,
    level: 0
  };
  let userData = points[message.author.id];
  userData.points++;

  let curLevel = Math.floor(0.1 * Math.sqrt(userData.points));
  if (curLevel > userData.level) {
    // Level up!
    userData.level = curLevel;
    message.reply(`You"ve leveled up to level **${curLevel}**! Ain"t that dandy?`);
  }

  if (message.content.startsWith(prefix + "level")) {
    message.reply(`You are currently level ${userData.level}, with ${userData.points} points.`);
  }
  fs.writeFile("./points.json", JSON.stringify(points), (err) => {
    if (err) console.error(err)
  });

});

client.login("SuperSecretBotTokenHere");

我希望这有帮助！