TW-1923: Improve search screen

lib/pages/chat_search/chat_search_style.dart

@@ -13,6 +13,9 @@ class ChatSearchStyle {
   static const EdgeInsetsGeometry avatarPadding =
       EdgeInsetsDirectional.symmetric(horizontal: 8, vertical: 16);
 
+  static const EdgeInsetsGeometry searchAppBarPadding =
+      EdgeInsetsDirectional.only(top: 16.0);
+
   static const EdgeInsetsGeometry emptyPadding = EdgeInsetsDirectional.all(16);
 
   static const double emptyGap = 128.0;

lib/pages/chat_search/chat_search_view.dart

@@ -45,7 +45,10 @@ class ChatSearchView extends StatelessWidget {
         toolbarHeight: AppConfig.toolbarHeight(context),
         backgroundColor: LinagoraSysColors.material().onPrimary,
         automaticallyImplyLeading: false,
-        title: _ChatSearchAppBar(controller),
+        title: Padding(
+          padding: ChatSearchStyle.searchAppBarPadding,
+          child: _ChatSearchAppBar(controller),
+        ),
       ),
       body: controller.sameTypeEventsBuilderController != null
           ? _TimelineSearchView(

lib/pages/search/search_view.dart

@@ -73,8 +73,10 @@ class SearchView extends StatelessWidget {
                 searchController.serverSearchController.searchResultsNotifier,
             builder: ((context, searchResults, child) {
               if (searchResults is PresentationServerSideEmptySearch) {
+                final keyword = searchController.textEditingController.text;
                 if (searchController.searchContactAndRecentChatController!
-                    .recentAndContactsNotifier.value.isNotEmpty) {
+                        .recentAndContactsNotifier.value.isNotEmpty ||
+                    (keyword.isValidMatrixId && keyword.startsWith('@'))) {
                   return child!;
                 }
                 return _SearchHeader(

lib/pages/search/server_search_view.dart

@@ -28,11 +28,13 @@ class ServerSearchMessagesList extends StatelessWidget {
             searchController.serverSearchController.searchResultsNotifier,
         builder: (context, serverSearchNotifier, child) {
           if (serverSearchNotifier is PresentationServerSideEmptySearch) {
+            final keyword = searchController.textEditingController.text;
             if (searchController.searchContactAndRecentChatController!
-                .recentAndContactsNotifier.value.isNotEmpty) {
-              return const SizedBox.shrink();
+                    .recentAndContactsNotifier.value.isEmpty &&
+                !(keyword.isValidMatrixId && keyword.startsWith('@'))) {
+              return child!;
             }
-            return child!;
+            return const SizedBox.shrink();
           }
 
           if (serverSearchNotifier is PresentationServerSideSearch) {

test/pages/search/server_search_view_test.dart

@@ -0,0 +1,154 @@
+import 'package:fluffychat/config/localizations/localization_service.dart';
+import 'package:fluffychat/config/themes.dart';
+import 'package:fluffychat/pages/search/search.dart';
+import 'package:fluffychat/pages/search/search_contacts_and_chats_controller.dart';
+import 'package:fluffychat/pages/search/server_search_controller.dart';
+import 'package:fluffychat/pages/search/server_search_view.dart';
+import 'package:fluffychat/presentation/model/search/presentation_search.dart';
+import 'package:fluffychat/presentation/model/search/presentation_server_side_empty_search.dart';
+import 'package:fluffychat/presentation/model/search/presentation_server_side_state.dart';
+import 'package:fluffychat/utils/custom_scroll_behaviour.dart';
+import 'package:fluffychat/utils/responsive/responsive_utils.dart';
+import 'package:fluffychat/widgets/search/empty_search_widget.dart';
+import 'package:fluffychat/widgets/theme_builder.dart';
+import 'package:flutter/material.dart' hide SearchController;
+import 'package:flutter_localizations/flutter_localizations.dart';
+import 'package:flutter_localized_locales/flutter_localized_locales.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:get_it/get_it.dart';
+import 'package:linagora_design_flutter/linagora_design_flutter.dart';
+import 'package:mockito/annotations.dart';
+import 'package:flutter_gen/gen_l10n/l10n.dart';
+import 'package:mockito/mockito.dart';
+import 'server_search_view_test.mocks.dart';
+
+@GenerateNiceMocks([
+  MockSpec<SearchController>(),
+  MockSpec<ServerSearchController>(),
+  MockSpec<TextEditingController>(),
+  MockSpec<SearchContactsAndChatsController>(),
+])
+void main() {
+  late final SearchController mockSearchController;
+  late final ServerSearchController mockServerSearchController;
+  late final TextEditingController mockTextEditingController;
+  late final SearchContactsAndChatsController
+      mockSearchContactAndRecentChatController;
+
+  setUpAll(() {
+    final getIt = GetIt.instance;
+    getIt.registerSingleton(ResponsiveUtils());
+    mockSearchController = MockSearchController();
+    mockServerSearchController = MockServerSearchController();
+    mockTextEditingController = MockTextEditingController();
+    mockSearchContactAndRecentChatController =
+        MockSearchContactsAndChatsController();
+  });
+
+  Future<void> makeTestable(WidgetTester tester) async {
+    await tester.pumpWidget(
+      ThemeBuilder(
+        builder: (context, themeMode, primaryColor) => MaterialApp(
+          locale: const Locale('en'),
+          scrollBehavior: CustomScrollBehavior(),
+          localizationsDelegates: const [
+            LocaleNamesLocalizationsDelegate(),
+            L10n.delegate,
+            GlobalMaterialLocalizations.delegate,
+            GlobalCupertinoLocalizations.delegate,
+            GlobalWidgetsLocalizations.delegate,
+          ],
+          supportedLocales: LocalizationService.supportedLocales,
+          theme: TwakeThemes.buildTheme(
+            context,
+            Brightness.light,
+            primaryColor,
+          ),
+          home: Scaffold(
+            backgroundColor: LinagoraSysColors.material().onPrimary,
+            body: CustomScrollView(
+              physics: const ClampingScrollPhysics(),
+              slivers: [
+                ServerSearchMessagesList(
+                  searchController: mockSearchController,
+                ),
+              ],
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+
+  group('[ServerSearchMessagesList] TEST', () {
+    group('GIVEN searchResultsNotifier is PresentationServerSideEmptySearch',
+        () {
+      testWidgets(
+        'GIVEN notifier value is empty\n'
+        'AND recentAndContactsNotifier value is empty\n'
+        'AND keyword is a Matrix ID\n'
+        'THEN should display SizedBox.shrink\n',
+        (WidgetTester tester) async {
+          when(mockSearchController.serverSearchController)
+              .thenReturn(mockServerSearchController);
+          when(mockSearchController.textEditingController)
+              .thenReturn(mockTextEditingController);
+          when(mockSearchController.searchContactAndRecentChatController)
+              .thenReturn(
+            mockSearchContactAndRecentChatController,
+          );
+          when(mockTextEditingController.text).thenReturn('@test:domain.com');
+          when(mockServerSearchController.searchResultsNotifier).thenReturn(
+            ValueNotifier<PresentationServerSideUIState>(
+              PresentationServerSideEmptySearch(),
+            ),
+          );
+          when(
+            mockSearchContactAndRecentChatController.recentAndContactsNotifier,
+          ).thenReturn(ValueNotifier<List<PresentationSearch>>([]));
+
+          await makeTestable(tester);
+
+          expect(find.byType(SizedBox), findsOneWidget);
+
+          final SizedBox foundSizedBox =
+              tester.firstWidget(find.byType(SizedBox));
+          expect(foundSizedBox.child, isNull);
+          expect(foundSizedBox.width, equals(0));
+          expect(foundSizedBox.height, equals(0));
+        },
+      );
+
+      testWidgets(
+        'GIVEN searchResultsNotifier value is empty\n'
+        'AND recentAndContactsNotifier value is empty\n'
+        'AND keyword is not a Matrix ID\n'
+        'THEN should display EmptySearchWidget\n',
+        (WidgetTester tester) async {
+          when(mockSearchController.serverSearchController)
+              .thenReturn(mockServerSearchController);
+          when(mockSearchController.textEditingController)
+              .thenReturn(mockTextEditingController);
+          when(mockSearchController.searchContactAndRecentChatController)
+              .thenReturn(
+            mockSearchContactAndRecentChatController,
+          );
+          when(mockTextEditingController.text).thenReturn('test');
+          when(mockServerSearchController.searchResultsNotifier).thenReturn(
+            ValueNotifier<PresentationServerSideUIState>(
+              PresentationServerSideEmptySearch(),
+            ),
+          );
+          when(
+            mockSearchContactAndRecentChatController.recentAndContactsNotifier,
+          ).thenReturn(ValueNotifier<List<PresentationSearch>>([]));
+
+          await makeTestable(tester);
+          await tester.pumpAndSettle();
+
+          expect(find.byType(EmptySearchWidget), findsOneWidget);
+        },
+      );
+    });
+  });
+}