part 07

src/index.js

@@ -3,10 +3,14 @@ import ReactDOM from 'react-dom';
 import './index.css';
 import App from './components/App';
 import storyStore from './stores/storyStore';
+import archiveStore from './stores/archiveStore';
 import registerServiceWorker from './registerServiceWorker';
 
 ReactDOM.render(
-  <App stories={storyStore.stories} onArchive={(objectID) => { console.log(objectID); }} />,
+  <App
+    stories={storyStore.stories}
+    onArchive={(objectID) => archiveStore.archivedStoryIds.push(objectID)}
+  />,
   document.getElementById('root')
 );
 registerServiceWorker();

src/stores/archiveStore.js

@@ -0,0 +1,9 @@
+import { observable } from 'mobx';
+
+class ArchiveStore {
+  @observable archivedStoryIds = [];
+}
+
+const archiveStore = new ArchiveStore();
+
+export default archiveStore;