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state.ts
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state.ts
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/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0; you may not use this file except in compliance with the Elastic License
* 2.0.
*/
/* es-lint-disable import/no-extraneous-dependencies */
import { applyMiddleware, Dispatch, Store } from 'redux';
import thunkMiddleware from 'redux-thunk';
import addons from '@storybook/addons';
import { diff } from 'jsondiffpatch';
import { isFunction } from 'lodash';
import { EVENTS } from './constants';
// @ts-expect-error untyped local
import { getRootReducer } from '../../public/state/reducers';
// @ts-expect-error Untyped local
import { getInitialState as getState } from '../../public/state/initial_state';
import { State } from '../../types';
export const getInitialState: () => State = () => getState();
export const getMiddleware = () => applyMiddleware(thunkMiddleware);
export const getReducer = () => getRootReducer(getInitialState());
export const patchDispatch: (store: Store, dispatch: Dispatch) => Dispatch =
(store, dispatch) => (action) => {
const channel = addons.getChannel();
const previousState = store.getState();
const returnValue = dispatch(action);
const newState = store.getState();
const change = diff(previousState, newState) || {};
channel.emit(EVENTS.ACTION, {
previousState,
newState,
change,
action: isFunction(action) ? { type: '(thunk)' } : action,
});
return returnValue;
};