frontend/src/auth/index.js


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import { LOG_IN_SUCCEEDED, LOG_OUT } from '../actions/auth'
import { DELETE_CURRENT_USER_SUCCEEDED } from '../actions/users'

const getAuthObject = () => {
    const authItem = localStorage.getItem('auth')
    if (!authItem || authItem === '{}') {
        return undefined
    }
    return JSON.parse(authItem)
}

export const userIsLoggedIn = () => {
    const authObj = getAuthObject()

    if (!authObj || !authObj.googleId) {
        return false
    }

    const currentTime = new Date().getTime()
    return parseInt(authObj.expiresAt, 10) - currentTime > 0
}

export const getAuthToken = () => {
    const authObj = getAuthObject()
    if (!authObj) {
        return undefined
    }

    return authObj.authToken
}

export const saveAuthLocalStorage = (payload) => {
    localStorage.setItem('auth', JSON.stringify(payload))
}

export const clearAuthLocalStorage = () => {
    localStorage.setItem('auth', '')
}

export const authRedirectMiddleware = (store) => (next) => (action) => {
    switch (action.type) {
        case LOG_IN_SUCCEEDED:
            saveAuthLocalStorage(action.payload)
            window.location.href = '/simulations'
            break
        case LOG_OUT:
        case DELETE_CURRENT_USER_SUCCEEDED:
            clearAuthLocalStorage()
            window.location.href = '/'
            break
        default:
            next(action)
            return
    }

    next(action)
}