auth.js

import jwtDecode from 'jwt-decode'
import * as auth from '../actions/auth'

function getInitialState() {
  let initialState = {
    access: undefined,
    refresh: undefined,
    errors: {}
  }
  const authStorage = localStorage.getItem('persist:polls')
  if (!(authStorage == null)) {
    const token = JSON.parse(JSON.parse(authStorage)['auth'])
    if (!(token.access === undefined)) {
      initialState.access = token.access.token
      initialState.refresh = {
        token: token.refresh.token,
        exp: token.refresh.exp
      }
    }
  }
  return initialState
}

export default (state = getInitialState(), action) => {
  switch (action.type) {
    case auth.LOGIN_SUCCESS:
      return {
        access: {
          token: action.payload.access,
          ...jwtDecode(action.payload.access)
        },
        refresh: {
          token: action.payload.refresh,
          ...jwtDecode(action.payload.refresh)
        },
        errors: {}
      }
    case auth.TOKEN_RECEIVED:
      return {
        ...state,
        access: {
          token: action.payload.access,
          ...jwtDecode(action.payload.access)
        }
      }
    case auth.LOGIN_FAILURE:
    case auth.TOKEN_FAILURE:
      return {
        access: undefined,
        refresh: undefined,
        errors: action.payload.response || {'non_field_errors': action.payload.statusText}
      }
    default:
      return state
  }
}

export function accessToken (state) {
  if (state.access) {
    return state.access.token
  }
}

export function isAccessTokenExpired (state) {
  if (state.access && state.access.exp) {
    return 1000 * state.access.exp - (new Date()).getTime() < 5000
  }
  return true
}

export function refreshToken (state) {
  if (state.refresh) {
    return state.refresh.token
  }
}

export function isRefreshTokenExpired (state) {
  if (state.refresh && state.refresh.exp) {
    return 1000 * state.refresh.exp - (new Date()).getTime() < 5000
  }
  return true
}

export function isAuthenticated (state) {
  return !isRefreshTokenExpired(state)
}

export function errors (state) {
  return state.errors
}