refactored search function using provider

lib/main.dart

@@ -3,6 +3,7 @@ import 'package:provider/provider.dart';
 import 'pages/collection_page.dart';
 import 'pages/collections_list_page.dart';
 import 'pages/search_page.dart';
+import 'service/search_provider.dart';
 import 'service/shared_link_provider.dart';
 import 'service/storage.dart';
 import 'service/share_intent_service.dart';
@@ -12,8 +13,11 @@ void main() async {
   WidgetsFlutterBinding.ensureInitialized();
   await Storage.initialize();
   runApp(
-    ChangeNotifierProvider(
-      create: (_) => SharedLinkProvider(),
+    MultiProvider(
+      providers: [
+        ChangeNotifierProvider(create: (_) => SharedLinkProvider()),
+        ChangeNotifierProvider(create: (_) => SearchProvider()),
+      ],
       child: const MapsBookmarks(),
     ),
   );

lib/pages/search_page.dart

@@ -1,23 +1,14 @@
 import 'package:flutter/material.dart';
-
-import '../model/bookmark.dart';
-import '../service/storage.dart';
+import 'package:provider/provider.dart';
+import '../service/search_provider.dart';
 import '../widgets/search_widgets/search_bar_widget.dart';
 import '../widgets/search_widgets/search_results_widget.dart';
 
-class SearchPage extends StatefulWidget {
+class SearchPage extends StatelessWidget {
   const SearchPage({super.key});
 
   static const String routeName = '/search';
 
-  @override
-  State<SearchPage> createState() => _SearchPageState();
-}
-
-class _SearchPageState extends State<SearchPage> {
-  final List<Bookmark> allBookmarks = Storage.loadBookmarks();
-  String searchString = '';
-
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -25,17 +16,9 @@ class _SearchPageState extends State<SearchPage> {
       body: Column(
         children: [
           SearchBarWidget(
-            onEditingComplete: (searchString) => setState(() {
-              this.searchString = searchString;
-            }),
-          ),
-          Expanded(
-            child: SearchResultsWidget(
-              bookmarks: allBookmarks.where(
-                (bookmark) => bookmark.name.contains(searchString),
-              ),
-            ),
+            onEditingComplete: context.read<SearchProvider>().setSearchText,
           ),
+          Expanded(child: SearchResultsWidget()),
         ],
       ),
     );

lib/service/search_provider.dart

@@ -0,0 +1,12 @@
+import 'package:flutter/material.dart';
+
+class SearchProvider extends ChangeNotifier {
+  String _searchText = '';
+
+  void setSearchText(String searchText, {bool silent = false}) {
+    _searchText = searchText;
+    if (!silent) notifyListeners();
+  }
+
+  String get searchText => _searchText;
+}

lib/widgets/search_widgets/search_bar_widget.dart

@@ -7,10 +7,10 @@ class SearchBarWidget extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    TextEditingController searchBarController = TextEditingController();
-    return TextField(
-      controller: searchBarController,
-      onEditingComplete: () => onEditingComplete(searchBarController.text),
-    );
+    return TextField(onChanged: (text) => onChanged(text, context));
+  }
+
+  void onChanged(String text, BuildContext context) {
+    if (context.mounted) onEditingComplete(text);
   }
 }

lib/widgets/search_widgets/search_results_widget.dart

@@ -1,16 +1,24 @@
 import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
 
 import '../../model/bookmark.dart';
 import '../../service/notifying.dart';
+import '../../service/search_provider.dart';
+import '../../service/storage.dart' show Storage;
 import '../../service/url_launcher.dart';
 
-class SearchResultsWidget extends StatelessWidget {
-  const SearchResultsWidget({super.key, required this.bookmarks});
+class SearchResultsWidget extends StatefulWidget {
+  const SearchResultsWidget({super.key});
 
-  final Iterable<Bookmark> bookmarks;
+  @override
+  State<SearchResultsWidget> createState() => _SearchResultsWidgetState();
+}
+
+class _SearchResultsWidgetState extends State<SearchResultsWidget> {
+  final List<Bookmark> allBookmarks = Storage.loadBookmarks();
 
   Widget bookmarkListItemBuilder(BuildContext context, int index) {
-    final bookmark = bookmarks.elementAt(index);
+    final bookmark = filteredBookmarks.elementAt(index);
     return ListTile(
       title: Text(bookmark.name),
       onTap: () => launchUrlFromString(bookmark.link).then((errorCode) {
@@ -25,12 +33,18 @@ class SearchResultsWidget extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    if (bookmarks.isNotEmpty) {
+    if (filteredBookmarks.isNotEmpty) {
       return ListView.builder(
         itemBuilder: bookmarkListItemBuilder,
-        itemCount: bookmarks.length,
+        itemCount: filteredBookmarks.length,
       );
     }
     return Center(child: Text('Start searching'));
   }
+
+  Iterable<Bookmark> get filteredBookmarks => allBookmarks.where(
+    (bookmark) => bookmark.name.toLowerCase().contains(
+      context.watch<SearchProvider>().searchText.toLowerCase(),
+    ),
+  );
 }