Add React Admin and modify AdminHandler

jsx/src/Store.js

@@ -0,0 +1,22 @@
+import { combineReducers } from "redux";
+
+export const initialState = {
+  user_data: undefined,
+  groups_data: undefined,
+  manage_groups_modal: false,
+};
+
+export const reducers = (state = initialState, action) => {
+  switch (action.type) {
+    case "USER_DATA":
+      return Object.assign({}, state, { user_data: action.value });
+    case "GROUPS_DATA":
+      return Object.assign({}, state, { groups_data: action.value });
+    case "TOGGLE_MANAGE_GROUPS_MODAL":
+      return Object.assign({}, state, {
+        manage_groups_modal: !state.manage_groups_modal,
+      });
+    default:
+      return state;
+  }
+};