Adding a notification stack for error messages

app/assets/javascripts/components/reducers/notifications.jsx

@@ -0,0 +1,27 @@
+import { COMPOSE_SUBMIT_FAIL, COMPOSE_UPLOAD_FAIL } from '../actions/compose';
+import { FOLLOW_SUBMIT_FAIL }                       from '../actions/follow';
+import { REBLOG_FAIL, FAVOURITE_FAIL }              from '../actions/interactions';
+import { TIMELINE_REFRESH_FAIL }                    from '../actions/timelines';
+import { NOTIFICATION_DISMISS }                     from '../actions/notifications';
+import Immutable                                    from 'immutable';
+
+const initialState = Immutable.List();
+
+export default function meta(state = initialState, action) {
+  switch(action.type) {
+    case COMPOSE_SUBMIT_FAIL:
+    case COMPOSE_UPLOAD_FAIL:
+    case FOLLOW_SUBMIT_FAIL:
+    case REBLOG_FAIL:
+    case FAVOURITE_FAIL:
+    case TIMELINE_REFRESH_FAIL:
+      return state.push(Immutable.fromJS({
+        message: action.error.response.statusText,
+        title: `${action.error.response.status}`
+      }));
+    case NOTIFICATION_DISMISS:
+      return state.clear();
+    default:
+      return state;
+  }
+};