'use strict';

/*
 * Module Dependencies.
 */

var bindAll = require('bind-all');
var clone = require('./utils/clone');

/**
 * HOP.
 */

var has = Object.prototype.hasOwnProperty;

/**
 * Expose `Memory`
 */

module.exports = bindAll(new Memory());

/**
 * Initialize `Memory` store
 */

function Memory() {
  this.store = {};
}

/**
 * Set a `key` and `value`.
 */

Memory.prototype.set = function(key: string, value: unknown): boolean {
  this.store[key] = clone(value);
  return true;
};

/**
 * Get a `key`.
 */

Memory.prototype.get = function(key: string): unknown | undefined {
  if (!has.call(this.store, key)) return;
  return clone(this.store[key]);
};

/**
 * Remove a `key`.
 */

Memory.prototype.remove = function(key: string): boolean {
  delete this.store[key];
  return true;
};