Made redux store fully immutable

1 files changed, 18 insertions, 3 deletions

diff --git a/frontend/src/reducers.js b/frontend/src/reducers.js
index 9befff13..097f9243 100644
--- a/frontend/src/reducers.js
+++ b/frontend/src/reducers.js
@@ -1,5 +1,20 @@
-import { combineReducers } from 'redux'
-import { routerReducer } from 'react-router-redux'
+import { combineReducers } from 'redux-immutable'
+
+// react-router-redux immutable reducer
+import { fromJS } from 'immutable'
+import { LOCATION_CHANGE } from 'react-router-redux'
+
+const initialState = fromJS({
+  locationBeforeTransitions: null
+})
+
+const routerImmutableReducer = (state = initialState, action) => {
+  if (action.type === LOCATION_CHANGE) {
+    return state.set('locationBeforeTransitions', action.payload)
+  }
+
+  return state
+}
 
 import gamesReducer from './redux/games'
 import playersReducer from './redux/players'
@@ -7,7 +22,7 @@ import playersReducer from './redux/players'
 export default function createReducer() {
   return combineReducers({
     games: gamesReducer,
-    routing: routerReducer,
+    routing: routerImmutableReducer,
     players: playersReducer,
   })
 }