behold the terror

/*
 * BasicDB is an extensible class meant to provide basic loading, saving, and backing up of JSON files. Has no state, makes minimal assumptions, and provides low-level functions
 *
 */

class BasicDB {

  /**
   * Very simple function, simply save a JSON to the given filepath
   *
   */

  saveJSONToFile(file, json) {
    if(!fs.existsSync(path.dirname(file))){
      fs.mkdirSync(path.dirname(file));
    } else {
      const out = JSON.stringify(json);
      fs.writeFileSync(file, out);
    }
  }

  /**
   * Very simple function; simply load a JSON from the passed file.
   *
   */
  loadJSONFromFile(file) {
    if(!fs.existsSync(path.dirname(file))) {
      throw 'No existing data! Searched in the following directory: ' + path.dirname(file);
    } else {
      const contents = fs.readFileSync(file);
      return JSON.parse(contents);
    }
  }

}

module.exports = BasicDB;


///////////////////////////////////////////////////

/**
 * ObjectDB is an extensible class meant to build upon BasicDB.
 *
 * The idea is, allow for saving objects that extend the Data class
 *
 */

const BasicDB = require('./basic-db');

class ObjectDB extends BasicDB {

  /**
   *
   */
  saveData(data, filepath, name){

    let json = [];
    for(d in data){
      json.push(d.toJSON());
    }
    this.saveJSONToFile(path.resolve(filepath, name), json);

  }

  /**
   * THIS IS TERRIBLE DESIGN BELOW; NEEDS CORRECTION VIA SOME FLAVOR OF POLYMORPHISM
   *
   */
  //Return JSON trades from filepath, one set in class as default
  loadData(DataClass, filepath, name) {

    const json = this.loadJSONFromFile(path.resolve(filepath, name));
    let data = [];
    for(j in json){
      data.push(new DataClass(j));
    }
    return data;

  }

}

module.exports = ObjectDB;

//////////////////////////////////////////

const Util = require('../util/util')

//Extend this, for the use of the ObjectDB
class JSONData {

  toJSON(){ return Util.instanceToObj(this); }

}

module.exports = JSONData;