persist state over reload

Summary: The selected device, app and plugin are not persisted over a reload using `redux-persist`.

Reviewed By: jknoxville

Differential Revision: D8836481

fbshipit-source-id: 3ace1a950a200255d5daf77791d706ede0ff2138

src/init.js

@@ -14,15 +14,36 @@ import Logger from './fb-stubs/Logger.js';
 import App from './App.js';
 import BugReporter from './fb-stubs/BugReporter.js';
 import {createStore} from 'redux';
+import {persistStore, persistReducer} from 'redux-persist';
+import createFilter from 'redux-persist-transform-filter';
+import storage from 'redux-persist/lib/storage/index.js';
+import autoMergeLevel2 from 'redux-persist/lib/stateReconciler/autoMergeLevel2';
 import reducers from './reducers/index.js';
 import dispatcher from './dispatcher/index.js';
 import {setupMenuBar} from './MenuBar.js';
 const path = require('path');
 
-const store = createStore(
+const reducer: typeof reducers = persistReducer(
+  {
+    key: 'root',
+    stateReconciler: autoMergeLevel2,
+    transforms: [
+      createFilter('connections', [
+        'userPreferredDevice',
+        'userPreferredPlugin',
+        'userPreferredApp',
+      ]),
+    ],
+    storage,
+  },
   reducers,
+);
+
+const store = createStore(
+  reducer,
   window.__REDUX_DEVTOOLS_EXTENSION__ && window.__REDUX_DEVTOOLS_EXTENSION__(),
 );
+persistStore(store);
 
 const logger = new Logger();
 const bugReporter = new BugReporter(logger);