diff -r 34a75bd8d0b9 -r d48946d164c6 client/src/reducers/syncReducer.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/client/src/reducers/syncReducer.js	Fri Jul 28 19:40:35 2017 +0200
@@ -0,0 +1,23 @@
+import * as types from '../constants/actionTypes';
+
+export const lastSync = (state = 0, action) => {
+  switch (action.type) {
+    case types.SYNC_SET_LAST_SYNC:
+      return action.value;
+    case types.AUTH_LOGOUT:
+      return 0;
+    default:
+      return state;
+  }
+}
+
+export const isSynchronizing = (state = false, action) => {
+  switch (action.type) {
+    case types.SYNC_DO_SYNC:
+      return true;
+    case types.SYNC_END_SYNC:
+      return false;
+    default:
+      return state;
+  }
+}