@uppy/store-default/lib/index.js

var _extends = Object.assign || function (target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i]; for (var key in source) { if (Object.prototype.hasOwnProperty.call(source, key)) { target[key] = source[key]; } } } return target; };

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

/**
 * Default store that keeps state in a simple object.
 */
var DefaultStore = function () {
  function DefaultStore() {
    _classCallCheck(this, DefaultStore);

    this.state = {};
    this.callbacks = [];
  }

  DefaultStore.prototype.getState = function getState() {
    return this.state;
  };

  DefaultStore.prototype.setState = function setState(patch) {
    var prevState = _extends({}, this.state);
    var nextState = _extends({}, this.state, patch);

    this.state = nextState;
    this._publish(prevState, nextState, patch);
  };

  DefaultStore.prototype.subscribe = function subscribe(listener) {
    var _this = this;

    this.callbacks.push(listener);
    return function () {
      // Remove the listener.
      _this.callbacks.splice(_this.callbacks.indexOf(listener), 1);
    };
  };

  DefaultStore.prototype._publish = function _publish() {
    for (var _len = arguments.length, args = Array(_len), _key = 0; _key < _len; _key++) {
      args[_key] = arguments[_key];
    }

    this.callbacks.forEach(function (listener) {
      listener.apply(undefined, args);
    });
  };

  return DefaultStore;
}();

module.exports = function defaultStore() {
  return new DefaultStore();
};