1 files changed, 33 insertions, 0 deletions
diff --git a/frontend/src/reducers/states.js b/frontend/src/reducers/states.js
new file mode 100644
index 00000000..793f7b7d
--- /dev/null
+++ b/frontend/src/reducers/states.js
@@ -0,0 +1,33 @@
+import { combineReducers } from "redux";
+import { ADD_BATCH_TO_STATES } from "../actions/states";
+
+export const states = combineReducers({
+  task: objectStates("task"),
+  room: objectStates("room"),
+  rack: objectStates("rack"),
+  machine: objectStates("machine")
+});
+
+function objectStates(type) {
+  return (state = {}, action) => {
+    if (action.objectType !== type) {
+      return state;
+    }
+
+    if (action.type === ADD_BATCH_TO_STATES) {
+      const batch = {};
+      for (let i in action.objects) {
+        batch[action.objects[i].tick] = Object.assign(
+          {},
+          state[action.objects[i].tick],
+          batch[action.objects[i].tick],
+          { [action.objects[i][action.objectType + "Id"]]: action.objects[i] }
+        );
+      }
+
+      return Object.assign({}, state, batch);
+    }
+
+    return state;
+  };
+}