1 files changed, 18 insertions, 0 deletions
diff --git a/modern/src/reducers/index.js b/modern/src/reducers/index.js
new file mode 100644
index 00000000..b9c94771
--- /dev/null
+++ b/modern/src/reducers/index.js
@@ -0,0 +1,18 @@
+const initialState = {
+  devices: [],
+  positions: [],
+  events: []
+};
+
+function rootReducer(state = initialState, action) {
+  switch (action.type) {
+    case 'UPDATE_POSITIONS':
+      return Object.assign({}, {
+        positions: [...state.positions, ...action.positions]
+      });
+    default:
+      return state;
+  }
+}
+
+export default rootReducer