mobx-roof-pending-effect/lib/index.js

mobx-roof-pending-effect

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});

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

function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }

function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }

/**
 * Cancel action if action is pending
 */
var pendingActionCache = {};

var PendingError = function (_Error) {
  _inherits(PendingError, _Error);

  function PendingError() {
    _classCallCheck(this, PendingError);

    return _possibleConstructorReturn(this, Object.getPrototypeOf(PendingError).apply(this, arguments));
  }

  return PendingError;
}(Error);

var getKey = function getKey(model, action) {
  return model.getID() + '.' + action;
};

function beforeEffect(_ref) {
  var action = _ref.action;
  var payload = _ref.payload;
  var model = _ref.model;

  var key = getKey(model, action);
  if (pendingActionCache[key]) {
    throw new PendingError('PENDING_ERROR');
  }
  pendingActionCache[key] = true;
  return payload;
}

function afterEffect(_ref2) {
  var action = _ref2.action;
  var payload = _ref2.payload;
  var model = _ref2.model;

  var key = getKey(model, action);
  pendingActionCache[key] = false;
  return payload;
}

function errorEffect(_ref3) {
  var action = _ref3.action;
  var payload = _ref3.payload;
  var model = _ref3.model;

  var key = getKey(model, action);
  if (payload instanceof PendingError) {
    // Don't catch pending error
    return null;
  }
  pendingActionCache[key] = false;
  return payload;
}

exports.default = {
  before: beforeEffect,
  after: afterEffect,
  error: errorEffect
};
module.exports = exports['default'];