"use strict";

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

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

var Cache =
/*#__PURE__*/
function () {
  function Cache() {
    _classCallCheck(this, Cache);

    this._root = null;
    this._store = new Map();
  }

  _createClass(Cache, [{
    key: "empty",
    value: function empty() {
      return this._store.size === 0;
    }
  }, {
    key: "has",
    value: function has(key) {
      return this._store.has(key);
    }
  }, {
    key: "get",
    value: function get(key, defaultValue) {
      var res = this.has(key) ? this._store.get(key) : this.root();
      return typeof res === 'undefined' || res === null ? defaultValue : res;
    }
  }, {
    key: "add",
    value: function add(key, value) {
      if (this.empty()) {
        this._root = key;
      }

      this._store.set(key, value);
    }
  }, {
    key: "update",
    value: function update(key, value) {
      if (this.has(key)) {
        this._store.set(key, value);
      }
    }
  }, {
    key: "remove",
    value: function remove(key) {
      this._store["delete"](key);
    }
  }, {
    key: "root",
    value: function root() {
      return this._store.get(this._root);
    }
  }]);

  return Cache;
}();

var _default = Cache;
exports["default"] = _default;