axios interceptor

import axios from 'axios';

const API_CLIENT = axios.create({
  baseURL: 'base_url/api/v1/'
});

// request interceptor
const REQUEST_INTERCEPTOR = API_CLIENT.interceptors.request.use(function (config) {
  // TODO: uncomment Authorization header when token is available.
  // config.headers['Authorization'] = `Bearer ${localStorage.getItem('access_token')}`;
  return config;
}, function (error) {
  return Promise.reject(error);
});

// response interceptor
const RESPONSE_INTERCEPTOR = API_CLIENT.interceptors.response.use(function (response) {
  return response;
}, function (error) {
  let {response} = error;
  if (response && response.status === 401) {
    // Do logout;
    // Redirect to login;
    return Promise.reject(error.response);
  }
  else if (error.response){
    // Do something.
    console.log('some API_CLIENT error');
    return Promise.reject(error.response);
  }
  return Promise.reject(error);

});

// Note: ejectRequestInterceptors and ejectResponseInterceptors eject interceptors permanently.
function ejectRequestInterceptors(){
  API_CLIENT.interceptors.request.eject(REQUEST_INTERCEPTOR);
}

function ejectResponseInterceptors(){
  API_CLIENT.interceptors.response.eject(RESPONSE_INTERCEPTOR);
}

export {
  API_CLIENT,
  ejectRequestInterceptors,
  ejectResponseInterceptors
};