Update the user reducer from switch to map

src/public/js/reducers/users.js

@@ -1,7 +1,7 @@
-import { OrderedMap, Map, fromJS } from 'immutable'
+import { Map } from "immutable"
 
-import jwtDecode from 'jwt-decode'
-import Cookies from 'universal-cookie'
+import jwtDecode from "jwt-decode"
+import Cookies from "universal-cookie"
 
 const defaultState = Map({
   loading: false,
@@ -12,42 +12,35 @@ const defaultState = Map({
   polochonUrl: "",
 });
 
-export default function userStore(state = defaultState, action) {
-  switch (action.type) {
-    case 'USER_LOGIN_PENDING':
-      return state.set('loading', true);
-    case 'USER_LOGIN_FULFILLED':
+const handlers = {
+  "USER_LOGIN_PENDING": state => state.set("loading", true),
+  "USER_LOGIN_FULFILLED": (state, action) => {
     if (action.payload.response.status === "error") {
       return logoutUser()
     }
     return updateFromToken(state, action.payload.response.data.token)
-    case 'USER_SET_TOKEN':
-      return updateFromToken(state, action.payload.token)
-    case 'USER_LOGOUT':
-      return logoutUser()
-    case 'GET_USER_FULFILLED':
-      return state.merge(Map({
+  },
+  "USER_SET_TOKEN": (state, action) => updateFromToken(state, action.payload.token),
+  "USER_LOGOUT": () => logoutUser(),
+  "GET_USER_FULFILLED": (state, action) => state.merge(Map({
     polochonToken: action.payload.response.data.token,
     polochonUrl: action.payload.response.data.url,
-      }))
-    default:
-      return state;
-  }
+  })),
 }
 
 function logoutUser() {
-  localStorage.removeItem('token');
+  localStorage.removeItem("token");
   const cookies = new Cookies();
-  cookies.remove('token');
+  cookies.remove("token");
   return defaultState
 }
 
 function updateFromToken(state, token) {
   const decodedToken = jwtDecode(token);
-  localStorage.setItem('token', token);
+  localStorage.setItem("token", token);
 
   const cookies = new Cookies();
-  cookies.set('token', token);
+  cookies.set("token", token);
 
   return state.merge(Map({
     userLoading: false,
@@ -56,3 +49,6 @@ function updateFromToken(state, token) {
     username: decodedToken.username,
   }))
 }
+
+export default (state = defaultState, action) =>
+  handlers[action.type] ? handlers[action.type](state, action) : state;