Improve user search logic

lib/widgets/friends_list.dart

@@ -16,7 +16,7 @@ import 'package:flutter/material.dart';
 class MenuItemDefinition {
   final String name;
   final IconData icon;
-  final void Function() onTap;
+  final Function() onTap;
 
   const MenuItemDefinition({required this.name, required this.icon, required this.onTap});
 }
@@ -100,15 +100,20 @@ class _FriendsListState extends State<FriendsList> {
             padding: const EdgeInsets.only(right: 4),
             child: PopupMenuButton<MenuItemDefinition>(
               icon: const Icon(Icons.more_vert),
-              onSelected: (MenuItemDefinition itemDef) {
-                itemDef.onTap();
+              onSelected: (MenuItemDefinition itemDef) async {
+                await itemDef.onTap();
               },
               itemBuilder: (BuildContext context) => [
-                    MenuItemDefinition(name: "Settings", icon: Icons.settings, onTap: () {
-                      Navigator.of(context).push(MaterialPageRoute(builder: (context) => const SettingsPage()));
+                    MenuItemDefinition(name: "Settings", icon: Icons.settings, onTap: () async {
+                      _autoRefresh?.cancel();
+                      await Navigator.of(context).push(MaterialPageRoute(builder: (context) => const SettingsPage()));
+                      _autoRefresh = Timer(_autoRefreshDuration, () => setState(() => _refreshFriendsList()));
                     }),
-                    MenuItemDefinition(name: "Find Users", icon: Icons.person_add, onTap: () {
-                      Navigator.of(context).push(MaterialPageRoute(builder: (context) => const UserSearch()));
+                    MenuItemDefinition(name: "Find Users", icon: Icons.person_add, onTap: () async {
+                      _autoRefresh?.cancel();
+                      await Navigator.of(context).push(MaterialPageRoute(builder: (context) => const UserSearch()));
+                      _autoRefresh = Timer(_autoRefreshDuration, () => setState(() => _refreshFriendsList()));
+
                     })
                   ].map((item) =>
                       PopupMenuItem<MenuItemDefinition>(

lib/widgets/user_search.dart

@@ -25,10 +25,11 @@ class UserSearch extends StatefulWidget {
 class _UserSearchState extends State<UserSearch> {
   final TextEditingController _searchInputController = TextEditingController();
   Timer? _searchDebouncer;
-  late Future<List<User>>? _usersFuture = _emptySearch;
-  bool _isLoading = false;
+  late Future<List<User>?>? _usersFuture = _emptySearch;
 
-  Future<List<User>> get _emptySearch => Future(() => throw const SearchError(
+  Future<List<User>> get _emptySearch =>
+      Future(() =>
+      throw const SearchError(
           message: "Start typing to search for users", icon: Icons.search)
       );
 
@@ -38,37 +39,34 @@ class _UserSearchState extends State<UserSearch> {
       return;
     }
     _usersFuture = UserApi.searchUsers(ClientHolder
-        .of(context).apiClient, needle: needle).then((value) {
+        .of(context)
+        .apiClient, needle: needle).then((value) {
       final res = value.toList();
       if (res.isEmpty) throw SearchError(message: "No user found with username '$needle'", icon: Icons.search_off);
       res.sort(
               (a, b) => a.username.length.compareTo(b.username.length)
       );
       return res;
-    }).whenComplete(() => setState(() => _isLoading = false));
-  }
-
-  @override
-  void initState() {
-    super.initState();
+    });
   }
 
   @override
   Widget build(BuildContext context) {
+    final mClient = ClientHolder
+        .of(context)
+        .messagingClient;
     return Scaffold(
       appBar: AppBar(
         title: const Text("Find Users"),
       ),
       body: Column(
         children: [
-          if(_isLoading) const LinearProgressIndicator(),
           Expanded(
             child: FutureBuilder(
               future: _usersFuture,
               builder: (context, snapshot) {
                 if (snapshot.hasData) {
-                    final users = (snapshot.data as List<User>);
-                    final mClient = ClientHolder.of(context).messagingClient;
+                  final users = snapshot.data as List<User>;
                   return ListView.builder(
                     itemCount: users.length,
                     itemBuilder: (context, index) {
@@ -89,9 +87,13 @@ class _UserSearchState extends State<UserSearch> {
                     return DefaultErrorWidget(title: "${snapshot.error}",);
                   }
                 } else {
-                    return const SizedBox.shrink();
-                  }
+                  return Column(
+                    children: const [
+                      LinearProgressIndicator(),
+                    ],
+                  );
                 }
+              },
             ),
           ),
           Padding(
@@ -111,13 +113,12 @@ class _UserSearchState extends State<UserSearch> {
                 _searchDebouncer?.cancel();
                 if (value.isEmpty) {
                   setState(() {
-                    _isLoading = false;
                     _querySearch(context, value);
                   });
                   return;
                 }
                 setState(() {
-                  _isLoading = true;
+                  _usersFuture = Future(() => null);
                 });
                 _searchDebouncer = Timer(const Duration(milliseconds: 300), () {
                   setState(() {