music-player/src/reducers/authReducer.js

import jwt_decode from "jwt-decode";

export function authReducer(state, { type, token }) {
    if (!state) {
        if (localStorage.authToken) {
            type = 'AUTH_LOGIN'
            token = localStorage.authToken
        } else state = {}
    }
    if (type === 'AUTH_LOGIN') {
        localStorage.setItem('authToken', token)
        let payload = jwt_decode(token)
        if (typeof payload === 'object') {
            return {
                ...state,
                token,
                payload
            }
        } else return state
    }
    if (type === 'AUTH_LOGOUT') {
        localStorage.removeItem('authToken')
        return {}
    }
    return state
}



export const actionAuthLogin = token => ({ type: 'AUTH_LOGIN', token })
export const actionAuthLogout = () => ({ type: 'AUTH_LOGOUT' })