@knapsack/app/dist/server/dbs/mem-db.js

Build Design Systems on top of knapsack, by Basalt

"use strict";

var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.MemDb = void 0;

var _defineProperty2 = _interopRequireDefault(require("@babel/runtime/helpers/defineProperty"));

var _md = _interopRequireDefault(require("md5"));

function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); keys.push.apply(keys, symbols); } return keys; }

function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(Object(source), true).forEach(function (key) { (0, _defineProperty2.default)(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }

/**
 * Creates an in-memory database for temporary storage
 */
class MemDb {
  constructor() {
    (0, _defineProperty2.default)(this, "db", void 0);
    this.db = new Map();
  }
  /**
   * @param data - data to store, must be serializable
   * @returns md5 hash used to retrieve data later
   */


  addData(data) {
    const hash = (0, _md.default)(JSON.stringify(data));
    if (this.db.has(hash)) return hash;
    const time = new Date().getTime();
    this.db.set(hash, {
      accessed: 0,
      dateCreated: time,
      dateLastAccessed: time,
      data
    });
    return hash;
  }
  /**
   * @param hash - md5 hash of data to retrieve
   * @returns if data is found, then it's returned, if not then `null`
   */


  getData(hash) {
    const item = this.db.get(hash);
    if (!item) return null;
    this.db.set(hash, _objectSpread({}, item, {
      accessed: item.accessed + 1,
      dateLastAccessed: new Date().getTime()
    }));
    return item.data;
  }

}

exports.MemDb = MemDb;