"use strict";

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

/**
 * @todo use the one in _forks ?
 * Creates a broadcast that can be listened to, i.e. simple event emitter
 * @see https://github.com/ReactTraining/react-broadcast
 */
const createBroadcast = initialState => {
  const listeners = {};
  let id = 0;
  let state = initialState;

  function publish(nextState) {
    state = nextState; // eslint-disable-next-line guard-for-in, no-restricted-syntax

    for (const key in listeners) {
      const listener = listeners[key];

      if (listener === undefined) {
        // eslint-disable-next-line no-continue
        continue;
      }

      listener(state);
    }
  }

  function subscribe(listener) {
    const currentId = id;
    listeners[currentId] = listener;
    id += 1;
    listener(state);
    return currentId;
  }

  function unsubscribe(unsubID) {
    listeners[unsubID] = undefined;
  }

  return {
    publish,
    subscribe,
    unsubscribe
  };
};

exports.createBroadcast = createBroadcast;
var _default = createBroadcast;
exports.default = _default;