Automatically refresh the list of notifications when required

lib/ui/screens/notifications_screen.dart

@@ -1,3 +1,4 @@
+import 'package:comunic/helpers/events_helper.dart';
 import 'package:comunic/helpers/groups_helper.dart';
 import 'package:comunic/helpers/notifications_helper.dart';
 import 'package:comunic/helpers/users_helper.dart';
@@ -7,6 +8,7 @@ import 'package:comunic/lists/users_list.dart';
 import 'package:comunic/models/notification.dart' as n;
 import 'package:comunic/ui/routes/main_route.dart';
 import 'package:comunic/ui/widgets/account_image_widget.dart';
+import 'package:comunic/ui/widgets/safe_state.dart';
 import 'package:comunic/utils/date_utils.dart';
 import 'package:comunic/utils/intl_utils.dart';
 import 'package:comunic/utils/navigation_utils.dart';
@@ -26,7 +28,7 @@ class NotificationsScreen extends StatefulWidget {
   _NotificationsScreenState createState() => _NotificationsScreenState();
 }
 
-class _NotificationsScreenState extends State<NotificationsScreen> {
+class _NotificationsScreenState extends SafeState<NotificationsScreen> {
   NotificationsList _list;
   UsersList _users;
   GroupsList _groups;
@@ -62,6 +64,14 @@ class _NotificationsScreenState extends State<NotificationsScreen> {
     }
   }
 
+  @override
+  void initState() {
+    super.initState();
+
+    this.listenChangeState<NewNumberNotifsEvent>(
+            (d) => _refreshKey.currentState.show());
+  }
+
   @override
   void didChangeDependencies() {
     super.didChangeDependencies();
@@ -111,11 +121,11 @@ class _NotificationsScreenState extends State<NotificationsScreen> {
     return ListView(
       children: _list
           .map((f) => _NotificationTile(
-                notification: f,
-                usersList: _users,
-                groupsList: _groups,
-                onDelete: _deleteNotification,
-              ))
+        notification: f,
+        usersList: _users,
+        groupsList: _groups,
+        onDelete: _deleteNotification,
+      ))
           .toList(),
     );
   }
@@ -193,12 +203,12 @@ class _NotificationTile extends StatelessWidget {
     String message = "${srcUser.fullName} ";
 
     switch (notification.type) {
-      // Comment
+    // Comment
       case n.NotificationType.COMMENT_CREATED:
         message += tr("posted a comment");
         break;
 
-      // Friendship requests
+    // Friendship requests
       case n.NotificationType.SENT_FRIEND_REQUEST:
         message += tr("sent you a friendship request.");
         break;
@@ -211,7 +221,7 @@ class _NotificationTile extends StatelessWidget {
         message += tr("rejected your friendship request.");
         break;
 
-      // Groups membership
+    // Groups membership
       case n.NotificationType.SENT_GROUP_MEMBERSHIP_INVITATION:
         message += tr("invited you to join the group");
         break;
@@ -236,14 +246,14 @@ class _NotificationTile extends StatelessWidget {
         message += tr("rejected your request to join the group");
         break;
 
-      // Generic element creation
+    // Generic element creation
       case n.NotificationType.ELEM_CREATED:
         if (notification.onElemType == n.NotificationElementType.POST)
           message += tr("created a new post");
         break;
 
       case n.NotificationType.ELEM_UPDATED:
-        // Operation not implemented
+      // Operation not implemented
         break;
     }