MCSManager/core/DataModel.js

let fs = require("fs");
const EventEmitter = require("events");

class DataModel {
  constructor(filename) {
    this.__filename__ = "./" + filename + ".json";
  }

  filename(newFilename) {
    if (newFilename) this.__filename__ = newFilename + ".json";
    else return this.__filename__;
  }

  load() {
    // 同步而非异步 因为我们必须要线性执行而且读取的文件很小
    let data = fs.readFileSync(this.__filename__, "utf-8");
    let ele = JSON.parse(data);
    for (var key in ele) {
      this[key] = ele[key];
    }
  }

  save() {
    let name = this.__filename__;
    // 同步而非异步 因为我们必须要线性执行而且读取的文件很小
    fs.writeFileSync(this.__filename__, JSON.stringify(this, null, 4));
  }

  isExist(callback) {
    fs.exists(this.filename, function (exists) {
      callback(exists);
    });
  }

  update(needJson) {
    for (let key in needJson) {
      this[key] = needJson[key];
    }
  }

  upload(that, needkey) {
    let key = null;
    if (needkey == undefined) {
      for (var mineKey in this) {
        that[key] = this[key];
      }
      return;
    }
    for (let i = 0; i < needkey.length; i++) {
      key = needkey[i];
      if (this.hasOwnProperty(key)) {
        that[key] = this[key];
      } else {
        that[key] = undefined;
      }
    }
    return;
  }
}

module.exports = DataModel;