/**
 * Copyright 2013-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 */

'use strict';

var ReactLink = require('./ReactLink');
var ReactStateSetters = require('./ReactStateSetters');

/**
 * A simple mixin around ReactLink.forState().
 * See https://facebook.github.io/react/docs/two-way-binding-helpers.html
 */
var LinkedStateMixin = {
  /**
   * Create a ReactLink that's linked to part of this component's state. The
   * ReactLink will have the current value of this.state[key] and will call
   * setState() when a change is requested.
   *
   * @param {string} key state key to update.
   * @return {ReactLink} ReactLink instance linking to the state.
   */
  linkState: function (key) {
    return new ReactLink(this.state[key], ReactStateSetters.createStateKeySetter(this, key));
  }
};

module.exports = LinkedStateMixin;