@raid/fl/lib/transform.js

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.untypeEvent = exports.typeEvent = void 0;
var _actions = require("./actions");
const typeId = '@@type';
const globalStore = {};

/**
 * Converts regular events in to typed events
 * Can be used with update functions that expect type events
 */
const typeEvent = (update, store = globalStore, create = _actions.createAction) => {
  const map = event => {
    if (!event.type) {
      return event;
    }
    const {
      type,
      payload = null
    } = event;
    const typed = store[type];
    if (typed) {
      return typed.of(payload);
    }
    store[type] = create(type);
    return store[type].of(payload);
  };
  return (state, event) => update(state, map(event));
};

/**
 * Converts typed events in to regular events
 * Can be used with update functions that expect regular events
 */
exports.typeEvent = typeEvent;
const untypeEvent = update => {
  const map = event => {
    if (!event.join || !event[typeId]) {
      return event;
    }
    return {
      type: event[typeId],
      payload: event.join()
    };
  };
  return (state, event) => update(state, map(event));
};
exports.untypeEvent = untypeEvent;