- implementing immutable.js

app/reducers/items.js

@@ -1,16 +1,19 @@
-import { ITEMS_LOADED, GET_ITEMS } from '../constants/actionTypes.js';
+import { Map } from 'immutable';
 
-export const items = (state = {}, action) => {
+import {
+  GET_ITEMS,
+  ITEMS_LOADED,
+} from '../constants/actionTypes.js';
+
+export const items = (state = new Map(), action) => {
   switch (action.type) {
-    case GET_ITEMS:
-      return Object.assign({}, state, {
-        isFetching: true,
-      });
     case ITEMS_LOADED:
-      return Object.assign({}, state, {
-        items: action.payload,
-        isFetching: false,
+      const mapped = action.payload.toMap().mapEntries((entry) => {
+        const [, item] = entry;
+        return [`${item.id}`, item];
       });
+      return state.merge(mapped);
+    case GET_ITEMS:
     default:
       return state;
   }