Merge pull request 'Data import and export' (#6) from development into main

Reviewed-on: #6

.gitignore

@@ -1,16 +1,23 @@
+# Do not remove or rename entries in this file, only add new ones
+# See https://github.com/flutter/flutter/issues/128635 for more context.
+
 # Miscellaneous
 *.class
+*.lock
 *.log
 *.pyc
 *.swp
 .DS_Store
 .atom/
-.build/
 .buildlog/
 .history
 .svn/
-.swiftpm/
+lib/l10n/app_localizations*
-migrate_working_dir/
+
+# As packages are no longer pinned, we use a lockfile for testing locally.
+# When unpinning packages, Using lockfiles ensures that failures in PRs are
+# actually due to those PRs, not due to a package being updated.
+!/pubspec.lock
 
 # IntelliJ related
 *.iml
@@ -18,28 +25,142 @@ migrate_working_dir/
 *.iws
 .idea/
 
-# The .vscode folder contains launch configuration and tasks you configure in
+# Visual Studio Code related
-# VS Code which you may wish to be included in version control, so this line
+.classpath
-# is commented out by default.
+.project
-#.vscode/
+.settings/
+.vscode/*
+.ccls-cache
+
+# This file, on the master branch, should never exist or be checked-in.
+#
+# On a *final* release branch, that is, what will ship to stable or beta, the
+# file can be force added (git add --force) and checked-in in order to effectively
+# "pin" the engine artifact version so the flutter tool does not need to use git
+# to determine the engine artifacts.
+#
+# See https://github.com/flutter/flutter/blob/main/docs/tool/Engine-artifacts.md.
+/bin/internal/engine.version
+
+# Flutter repo-specific
+/bin/cache/
+/bin/internal/bootstrap.bat
+/bin/internal/bootstrap.sh
+/bin/internal/engine.realm
+/bin/mingit/
+/dev/benchmarks/mega_gallery/
+/dev/bots/.recipe_deps
+/dev/bots/android_tools/
+/dev/devicelab/ABresults*.json
+/dev/docs/doc/
+/dev/docs/api_docs.zip
+/dev/docs/flutter.docs.zip
+/dev/docs/lib/
+/dev/docs/pubspec.yaml
+/dev/integration_tests/**/xcuserdata
+/dev/integration_tests/**/Pods
+/packages/flutter/coverage/
+version
+analysis_benchmark.json
+
+# packages file containing multi-root paths
+.packages.generated
 
 # Flutter/Dart/Pub related
 **/doc/api/
-**/ios/Flutter/.last_build_id
 .dart_tool/
 .flutter-plugins-dependencies
+**/generated_plugin_registrant.dart
+.packages
+.pub-preload-cache/
 .pub-cache/
 .pub/
-/build/
+build/
-/coverage/
+flutter_*.png
+linked_*.ds
+unlinked.ds
+unlinked_spec.ds
 
-# Symbolication related
+# Android related
+**/android/**/gradle-wrapper.jar
+.gradle/
+**/android/captures/
+**/android/gradlew
+**/android/gradlew.bat
+**/android/**/GeneratedPluginRegistrant.java
+**/android/key.properties
+*.jks
+local.properties
+**/.cxx/
+
+# iOS/XCode related
+**/ios/**/*.mode1v3
+**/ios/**/*.mode2v3
+**/ios/**/*.moved-aside
+**/ios/**/*.pbxuser
+**/ios/**/*.perspectivev3
+**/ios/**/*sync/
+**/ios/**/.sconsign.dblite
+**/ios/**/.tags*
+**/ios/**/.vagrant/
+**/ios/**/DerivedData/
+**/ios/**/Icon?
+**/ios/**/Pods/
+**/ios/**/.symlinks/
+**/ios/**/profile
+**/ios/**/xcuserdata
+**/ios/.generated/
+**/ios/Flutter/.last_build_id
+**/ios/Flutter/App.framework
+**/ios/Flutter/Flutter.framework
+**/ios/Flutter/Flutter.podspec
+**/ios/Flutter/Generated.xcconfig
+**/ios/Flutter/ephemeral
+**/ios/Flutter/app.flx
+**/ios/Flutter/app.zip
+**/ios/Flutter/flutter_assets/
+**/ios/Flutter/flutter_export_environment.sh
+**/ios/ServiceDefinitions.json
+**/ios/Runner/GeneratedPluginRegistrant.*
+
+# macOS
+**/Flutter/ephemeral/
+**/Pods/
+**/macos/Flutter/GeneratedPluginRegistrant.swift
+**/macos/Flutter/ephemeral
+**/xcuserdata/
+
+# Windows
+**/windows/flutter/ephemeral/
+**/windows/flutter/generated_plugin_registrant.cc
+**/windows/flutter/generated_plugin_registrant.h
+**/windows/flutter/generated_plugins.cmake
+
+# Linux
+**/linux/flutter/ephemeral/
+**/linux/flutter/generated_plugin_registrant.cc
+**/linux/flutter/generated_plugin_registrant.h
+**/linux/flutter/generated_plugins.cmake
+
+# Coverage
+coverage/
+
+# Symbols
 app.*.symbols
 
-# Obfuscation related
+# Exceptions to above rules.
-app.*.map.json
+!**/ios/**/default.mode1v3
+!**/ios/**/default.mode2v3
+!**/ios/**/default.pbxuser
+!**/ios/**/default.perspectivev3
+!/packages/flutter_tools/test/data/dart_dependencies_test/**/.packages
+!/dev/ci/**/Gemfile.lock
+!.vscode/settings.json
 
-# Android Studio will place build artifacts here
+# Monorepo
-/android/app/debug
+.cipd
-/android/app/profile
+.gclient
-/android/app/release
+.gclient_entries
+.python-version
+.gclient_previous_custom_vars
+.gclient_previous_sync_commits

android/app/src/main/AndroidManifest.xml

@@ -1,5 +1,6 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
     <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE"/>
     <application
         android:label="maps_bookmarks"
         android:name="${applicationName}"

lib/assets/constants.dart

@@ -0,0 +1,3 @@
+const String appName = 'Maps Bookmarks';
+const String jsonFileName = 'MapsBookmarksData.json';
+const String defaultAndroidExportDirectory = '/storage/emulated/0/Documents';

lib/l10n/app_de.arb

@@ -23,5 +23,21 @@
     "collectionName": "Name der Sammlung",
     "bookmarkTitle": "Titel des Lesezeichens",
     "url": "Url",
-    "description": "Beschreibung"
+    "description": "Beschreibung",
+    "settings": "Einstellungen",
+    "appData": "App-Daten",
+    "export": "Exportieren",
+    "import": "Importieren",
+    "activateJsonExport": "Immer als JSON speichern",
+
+    "@@comment": "Info",
+    "exportSuccess": "Daten exportiert",
+    "importSuccess": "Daten importiert",
+
+    "@@comment": "Errors",
+    "errorStoragePermisson": "Zugriff auf Speicher verwehrt",
+    "errorCouldNotLaunchUrl": "Konnte Url nicht öffnen",
+    "errorInvalidUrl": "Fehlerhafte Url",
+    "exportFailed": "Export fehlgeschlagen",
+    "importFailed": "Import fehlgeschlagen"
 }

lib/l10n/app_en.arb

@@ -23,5 +23,22 @@
     "collectionName": "Collection Name",
     "bookmarkTitle": "Bookmark Title",
     "url": "Url",
-    "description": "Description"
+    "description": "Description",
+    "settings": "Settings",
+    "appData": "App data",
+    "export": "Export",
+    "import": "Import",
+    "activateJsonExport": "Always save to JSON",
+
+    
+    "@@comment": "Info",
+    "exportSuccess": "Exported data",
+    "importSuccess": "Imported data",
+    
+    "@@comment": "Errors",
+    "errorStoragePermisson": "Storage permissions denied",
+    "errorCouldNotLaunchUrl": "Could not launch Url",
+    "errorInvalidUrl": "Invalid Url",
+    "exportFailed": "Export failed",
+    "importFailed": "Import failed"
 }

lib/l10n/app_localizations.dart

@@ -1,236 +0,0 @@
-import 'dart:async';
-
-import 'package:flutter/foundation.dart';
-import 'package:flutter/widgets.dart';
-import 'package:flutter_localizations/flutter_localizations.dart';
-import 'package:intl/intl.dart' as intl;
-
-import 'app_localizations_de.dart';
-import 'app_localizations_en.dart';
-
-// ignore_for_file: type=lint
-
-/// Callers can lookup localized strings with an instance of AppLocalizations
-/// returned by `AppLocalizations.of(context)`.
-///
-/// Applications need to include `AppLocalizations.delegate()` in their app's
-/// `localizationDelegates` list, and the locales they support in the app's
-/// `supportedLocales` list. For example:
-///
-/// ```dart
-/// import 'l10n/app_localizations.dart';
-///
-/// return MaterialApp(
-///   localizationsDelegates: AppLocalizations.localizationsDelegates,
-///   supportedLocales: AppLocalizations.supportedLocales,
-///   home: MyApplicationHome(),
-/// );
-/// ```
-///
-/// ## Update pubspec.yaml
-///
-/// Please make sure to update your pubspec.yaml to include the following
-/// packages:
-///
-/// ```yaml
-/// dependencies:
-///   # Internationalization support.
-///   flutter_localizations:
-///     sdk: flutter
-///   intl: any # Use the pinned version from flutter_localizations
-///
-///   # Rest of dependencies
-/// ```
-///
-/// ## iOS Applications
-///
-/// iOS applications define key application metadata, including supported
-/// locales, in an Info.plist file that is built into the application bundle.
-/// To configure the locales supported by your app, you’ll need to edit this
-/// file.
-///
-/// First, open your project’s ios/Runner.xcworkspace Xcode workspace file.
-/// Then, in the Project Navigator, open the Info.plist file under the Runner
-/// project’s Runner folder.
-///
-/// Next, select the Information Property List item, select Add Item from the
-/// Editor menu, then select Localizations from the pop-up menu.
-///
-/// Select and expand the newly-created Localizations item then, for each
-/// locale your application supports, add a new item and select the locale
-/// you wish to add from the pop-up menu in the Value field. This list should
-/// be consistent with the languages listed in the AppLocalizations.supportedLocales
-/// property.
-abstract class AppLocalizations {
-  AppLocalizations(String locale)
-    : localeName = intl.Intl.canonicalizedLocale(locale.toString());
-
-  final String localeName;
-
-  static AppLocalizations? of(BuildContext context) {
-    return Localizations.of<AppLocalizations>(context, AppLocalizations);
-  }
-
-  static const LocalizationsDelegate<AppLocalizations> delegate =
-      _AppLocalizationsDelegate();
-
-  /// A list of this localizations delegate along with the default localizations
-  /// delegates.
-  ///
-  /// Returns a list of localizations delegates containing this delegate along with
-  /// GlobalMaterialLocalizations.delegate, GlobalCupertinoLocalizations.delegate,
-  /// and GlobalWidgetsLocalizations.delegate.
-  ///
-  /// Additional delegates can be added by appending to this list in
-  /// MaterialApp. This list does not have to be used at all if a custom list
-  /// of delegates is preferred or required.
-  static const List<LocalizationsDelegate<dynamic>> localizationsDelegates =
-      <LocalizationsDelegate<dynamic>>[
-        delegate,
-        GlobalMaterialLocalizations.delegate,
-        GlobalCupertinoLocalizations.delegate,
-        GlobalWidgetsLocalizations.delegate,
-      ];
-
-  /// A list of this localizations delegate's supported locales.
-  static const List<Locale> supportedLocales = <Locale>[
-    Locale('de'),
-    Locale('en'),
-  ];
-
-  /// No description provided for @addToCollection.
-  ///
-  /// In en, this message translates to:
-  /// **'Add to {collection_name}'**
-  String addToCollection(String collection_name);
-
-  /// No description provided for @cancel.
-  ///
-  /// In en, this message translates to:
-  /// **'Cancel'**
-  String get cancel;
-
-  /// No description provided for @chooseCollection.
-  ///
-  /// In en, this message translates to:
-  /// **'Choose Collection'**
-  String get chooseCollection;
-
-  /// No description provided for @collections.
-  ///
-  /// In en, this message translates to:
-  /// **'Collections'**
-  String get collections;
-
-  /// No description provided for @tipCreateCollections.
-  ///
-  /// In en, this message translates to:
-  /// **'Create your first Collection to get started!'**
-  String get tipCreateCollections;
-
-  /// No description provided for @search.
-  ///
-  /// In en, this message translates to:
-  /// **'Search'**
-  String get search;
-
-  /// No description provided for @createBookmark.
-  ///
-  /// In en, this message translates to:
-  /// **'Create Bookmark'**
-  String get createBookmark;
-
-  /// No description provided for @createCollection.
-  ///
-  /// In en, this message translates to:
-  /// **'Create Collection'**
-  String get createCollection;
-
-  /// No description provided for @create.
-  ///
-  /// In en, this message translates to:
-  /// **'Create'**
-  String get create;
-
-  /// No description provided for @delete.
-  ///
-  /// In en, this message translates to:
-  /// **'Delete'**
-  String get delete;
-
-  /// No description provided for @add.
-  ///
-  /// In en, this message translates to:
-  /// **'Add'**
-  String get add;
-
-  /// No description provided for @startSearching.
-  ///
-  /// In en, this message translates to:
-  /// **'Start searching'**
-  String get startSearching;
-
-  /// No description provided for @tipNoResults.
-  ///
-  /// In en, this message translates to:
-  /// **'There are no results that match your search'**
-  String get tipNoResults;
-
-  /// No description provided for @collectionName.
-  ///
-  /// In en, this message translates to:
-  /// **'Collection Name'**
-  String get collectionName;
-
-  /// No description provided for @bookmarkTitle.
-  ///
-  /// In en, this message translates to:
-  /// **'Bookmark Title'**
-  String get bookmarkTitle;
-
-  /// No description provided for @url.
-  ///
-  /// In en, this message translates to:
-  /// **'Url'**
-  String get url;
-
-  /// No description provided for @description.
-  ///
-  /// In en, this message translates to:
-  /// **'Description'**
-  String get description;
-}
-
-class _AppLocalizationsDelegate
-    extends LocalizationsDelegate<AppLocalizations> {
-  const _AppLocalizationsDelegate();
-
-  @override
-  Future<AppLocalizations> load(Locale locale) {
-    return SynchronousFuture<AppLocalizations>(lookupAppLocalizations(locale));
-  }
-
-  @override
-  bool isSupported(Locale locale) =>
-      <String>['de', 'en'].contains(locale.languageCode);
-
-  @override
-  bool shouldReload(_AppLocalizationsDelegate old) => false;
-}
-
-AppLocalizations lookupAppLocalizations(Locale locale) {
-  // Lookup logic when only language code is specified.
-  switch (locale.languageCode) {
-    case 'de':
-      return AppLocalizationsDe();
-    case 'en':
-      return AppLocalizationsEn();
-  }
-
-  throw FlutterError(
-    'AppLocalizations.delegate failed to load unsupported locale "$locale". This is likely '
-    'an issue with the localizations generation tool. Please file an issue '
-    'on GitHub with a reproducible sample app and the gen-l10n configuration '
-    'that was used.',
-  );
-}

lib/l10n/app_localizations_de.dart

@@ -1,63 +0,0 @@
-// ignore: unused_import
-import 'package:intl/intl.dart' as intl;
-import 'app_localizations.dart';
-
-// ignore_for_file: type=lint
-
-/// The translations for German (`de`).
-class AppLocalizationsDe extends AppLocalizations {
-  AppLocalizationsDe([String locale = 'de']) : super(locale);
-
-  @override
-  String addToCollection(String collection_name) {
-    return 'Speichern in $collection_name';
-  }
-
-  @override
-  String get cancel => 'Abbrechen';
-
-  @override
-  String get chooseCollection => 'Sammlung auswählen';
-
-  @override
-  String get collections => 'Sammlungen';
-
-  @override
-  String get tipCreateCollections => 'Erstelle deine erste Sammlung!';
-
-  @override
-  String get search => 'Suche';
-
-  @override
-  String get createBookmark => 'Lesezeichen erstellen';
-
-  @override
-  String get createCollection => 'Sammlung erstellen';
-
-  @override
-  String get create => 'Erstellen';
-
-  @override
-  String get delete => 'Löschen';
-
-  @override
-  String get add => 'Hinzufügen';
-
-  @override
-  String get startSearching => 'Suche etwas';
-
-  @override
-  String get tipNoResults => 'Keine Suchergebnisse gefunden';
-
-  @override
-  String get collectionName => 'Name der Sammlung';
-
-  @override
-  String get bookmarkTitle => 'Titel des Lesezeichens';
-
-  @override
-  String get url => 'Url';
-
-  @override
-  String get description => 'Beschreibung';
-}

lib/l10n/app_localizations_en.dart

@@ -1,64 +0,0 @@
-// ignore: unused_import
-import 'package:intl/intl.dart' as intl;
-import 'app_localizations.dart';
-
-// ignore_for_file: type=lint
-
-/// The translations for English (`en`).
-class AppLocalizationsEn extends AppLocalizations {
-  AppLocalizationsEn([String locale = 'en']) : super(locale);
-
-  @override
-  String addToCollection(String collection_name) {
-    return 'Add to $collection_name';
-  }
-
-  @override
-  String get cancel => 'Cancel';
-
-  @override
-  String get chooseCollection => 'Choose Collection';
-
-  @override
-  String get collections => 'Collections';
-
-  @override
-  String get tipCreateCollections =>
-      'Create your first Collection to get started!';
-
-  @override
-  String get search => 'Search';
-
-  @override
-  String get createBookmark => 'Create Bookmark';
-
-  @override
-  String get createCollection => 'Create Collection';
-
-  @override
-  String get create => 'Create';
-
-  @override
-  String get delete => 'Delete';
-
-  @override
-  String get add => 'Add';
-
-  @override
-  String get startSearching => 'Start searching';
-
-  @override
-  String get tipNoResults => 'There are no results that match your search';
-
-  @override
-  String get collectionName => 'Collection Name';
-
-  @override
-  String get bookmarkTitle => 'Bookmark Title';
-
-  @override
-  String get url => 'Url';
-
-  @override
-  String get description => 'Description';
-}

lib/main.dart

@@ -5,6 +5,7 @@ import 'l10n/app_localizations.dart';
 import 'pages/collection_page.dart';
 import 'pages/collections_list_page.dart';
 import 'pages/search_page.dart';
+import 'pages/settings_page.dart';
 import 'service/search_provider.dart';
 import 'service/shared_link_provider.dart';
 import 'service/storage.dart';
@@ -83,6 +84,7 @@ class _MapsBookmarksState extends State<MapsBookmarks>
         CollectionsListPage.routeName: (context) => const CollectionsListPage(),
         CollectionPage.routeName: (context) => const CollectionPage(),
         SearchPage.routeName: (context) => const SearchPage(),
+        SettingsPage.routeName: (context) => const SettingsPage(),
       },
     );
   }

lib/pages/collections_list_page.dart

@@ -9,6 +9,7 @@ import '../service/storage.dart';
 import '../widgets/create_bookmark_collection_dialog.dart';
 import 'collection_page.dart';
 import 'search_page.dart' show SearchPage;
+import 'settings_page.dart';
 
 class CollectionsListPage extends StatefulWidget {
   const CollectionsListPage({super.key});
@@ -103,8 +104,13 @@ class _CollectionsListPageState extends State<CollectionsListPage> {
             IconButton(
               onPressed: () =>
                   Navigator.of(context).pushNamed(SearchPage.routeName),
-              icon: Icon(Icons.search),
+              icon: Icon(Icons.search_rounded),
             ),
+          IconButton(
+            onPressed: () =>
+                Navigator.of(context).pushNamed(SettingsPage.routeName),
+            icon: Icon(Icons.settings_rounded),
+          ),
         ],
       ),
       floatingActionButton: FloatingActionButton(

lib/pages/settings_page.dart

@@ -0,0 +1,86 @@
+import 'dart:async';
+
+import 'package:flutter/material.dart';
+import 'package:permission_handler/permission_handler.dart';
+
+import '../l10n/app_localizations.dart';
+import '../service/notifying.dart';
+import '../service/permission_service.dart';
+import '../service/storage.dart';
+
+class SettingsPage extends StatefulWidget {
+  static const routeName = '/settings';
+  const SettingsPage({super.key});
+
+  @override
+  State<SettingsPage> createState() => _SettingsPageState();
+}
+
+class _SettingsPageState extends State<SettingsPage> {
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(title: Text(AppLocalizations.of(context)!.settings)),
+      body: SizedBox(
+        width: MediaQuery.of(context).size.width * 0.9,
+        child: Column(
+          crossAxisAlignment: CrossAxisAlignment.center,
+          children: [
+            Text(
+              AppLocalizations.of(context)!.appData,
+              style: Theme.of(context).textTheme.titleLarge,
+            ),
+            ElevatedButton(
+              onPressed: () => onActivateJsonImportPressed(),
+              child: Text(AppLocalizations.of(context)!.import),
+            ),
+            ElevatedButton(
+              onPressed: () => onActivateJsonExportPressed(),
+              child: Text(AppLocalizations.of(context)!.export),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+
+  void onActivateJsonExportPressed() async {
+    if (!await checkStoragePermission) return;
+
+    Storage.exportToJsonFile().then(showExportInfo);
+  }
+
+  void onActivateJsonImportPressed() async {
+    if (!await checkStoragePermission) return;
+    Storage.importFromJsonFile().then(showImportInfo);
+  }
+
+  Future<bool> get checkStoragePermission async {
+    if (!(await PermissionService.requestStoragePermission).isGranted) {
+      if (mounted) {
+        Notifying.showErrorSnackbar(
+          context,
+          AppLocalizations.of(context)!.errorStoragePermisson,
+        );
+        return false;
+      }
+    }
+    return true;
+  }
+
+  void showExportInfo(bool success) => Notifying.showSnackbar(
+    context,
+    text: success
+        ? AppLocalizations.of(context)!.exportSuccess
+        : AppLocalizations.of(context)!.exportFailed,
+    isError: success,
+  );
+
+  void showImportInfo(bool success) => Notifying.showSnackbar(
+    context,
+    text: success
+        ? AppLocalizations.of(context)!.importSuccess
+        : AppLocalizations.of(context)!.importFailed,
+    isError: success,
+  );
+}

lib/service/json_file_service.dart

@@ -0,0 +1,77 @@
+import 'dart:convert';
+import 'dart:io';
+
+import 'package:file_selector/file_selector.dart';
+import 'package:flutter/services.dart';
+
+import '../model/bookmark.dart';
+import '../model/collection.dart';
+import '../assets/constants.dart' as constants;
+
+class JsonFileService {
+  static Future<bool> exportToJson({
+    required List<Collection> collections,
+    required List<Bookmark> bookmarks,
+  }) async {
+    try {
+      final dir = await _directoryPath;
+      if (dir.isEmpty) return false;
+
+      final data = {
+        'collections': collections.map((c) => c.toJson()).toList(),
+        'bookmarks': bookmarks.map((b) => b.toJson()).toList(),
+      };
+      final json = jsonEncode(data).codeUnits;
+      final file = XFile.fromData(
+        Uint8List.fromList(json),
+        mimeType: 'application/json',
+        name: constants.jsonFileName,
+      );
+
+      file.saveTo('$dir/${constants.jsonFileName}');
+    } catch (e) {
+      return false;
+    }
+    return false;
+  }
+
+  static Future<({List<Collection> collections, List<Bookmark> bookmarks})>
+  importFromJson() async {
+    try {
+      const typeGroup = XTypeGroup(label: 'json', extensions: <String>['json']);
+      final XFile? file = await openFile(
+        acceptedTypeGroups: <XTypeGroup>[typeGroup],
+      );
+
+      if (file == null) {
+        return (collections: <Collection>[], bookmarks: <Bookmark>[]);
+      }
+
+      final jsonString = await file.readAsString();
+
+      final data = jsonDecode(jsonString) as Map<String, dynamic>;
+
+      final collections = (data['collections'] as List<dynamic>? ?? [])
+          .map((json) => Collection.fromJson(json as Map<String, dynamic>))
+          .toList();
+
+      final bookmarks = (data['bookmarks'] as List<dynamic>? ?? [])
+          .map((json) => Bookmark.fromJson(json as Map<String, dynamic>))
+          .toList();
+
+      return (collections: collections, bookmarks: bookmarks);
+    } catch (e) {
+      return (collections: <Collection>[], bookmarks: <Bookmark>[]);
+    }
+  }
+
+  static Future<String> get _directoryPath async {
+    if (Platform.isAndroid) {
+      return await getDirectoryPath(
+            initialDirectory: constants.defaultAndroidExportDirectory,
+          ) ??
+          '';
+    }
+    return await getDirectoryPath() ?? '';
+  }
+}

lib/service/maps_launcher_service.dart

@@ -1,15 +1,9 @@
-// service/maps_launcher_service.dart
 import 'dart:io' show Platform;
 import 'package:android_intent_plus/android_intent.dart';
 
 class MapsLauncherService {
-  /// Opens a URL in Google Maps app
-  /// Falls back to browser if Maps app is not installed
   static Future<bool> openInGoogleMaps(String url) async {
-    if (!Platform.isAndroid) {
+    if (!Platform.isAndroid) return false;
-      // Handle iOS or other platforms if needed
-      return false;
-    }
 
     try {
       // Try to open in Google Maps app
@@ -28,36 +22,16 @@ class MapsLauncherService {
         await browserIntent.launch();
         return true;
       } catch (e) {
-        print('Failed to open maps link: $e');
         return false;
       }
     }
   }
 
-  /// Opens navigation to specific coordinates
-  static Future<bool> navigateToCoordinates(
-    String latitude,
-    String longitude,
-  ) async {
-    final url = 'google.navigation:q=$latitude,$longitude';
-    return openInGoogleMaps(url);
-  }
-
-  /// Opens a search query in Google Maps
-  static Future<bool> searchInMaps(String query) async {
-    final encodedQuery = Uri.encodeComponent(query);
-    final url = 'geo:0,0?q=$encodedQuery';
-    return openInGoogleMaps(url);
-  }
-
-  /// Shares a Google Maps link or location via Android share sheet
   static Future<bool> shareLocation({
     required String text,
     String? subject,
   }) async {
-    if (!Platform.isAndroid) {
+    if (!Platform.isAndroid) return false;
-      return false;
-    }
 
     try {
       final intent = AndroidIntent(
@@ -72,7 +46,6 @@ class MapsLauncherService {
       await intent.launch();
       return true;
     } catch (e) {
-      print('Failed to share location: $e');
       return false;
     }
   }

lib/service/notifying.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 
+import '../l10n/app_localizations.dart';
 import 'url_launcher.dart' show UrlLaunchErrorCode;
 
 class Notifying {
@@ -46,10 +47,18 @@ class Notifying {
     if (errorCode == UrlLaunchErrorCode.none) {
       return;
     } else if (errorCode == UrlLaunchErrorCode.couldNotLaunch) {
-      errorText = 'Could not launch Url';
+      errorText = AppLocalizations.of(context)!.errorCouldNotLaunchUrl;
     } else {
-      errorText = 'Invalid Url';
+      errorText = AppLocalizations.of(context)!.errorInvalidUrl;
     }
     showSnackbar(context, text: errorText, isError: true);
   }
+
+  static void showErrorSnackbar(BuildContext context, String message) {
+    showSnackbar(context, text: message, isError: true);
+  }
+
+  static void showMessageSnackbar(BuildContext context, String message) {
+    showSnackbar(context, text: message, isError: false);
+  }
 }

lib/service/permission_service.dart

@@ -0,0 +1,9 @@
+import 'package:permission_handler/permission_handler.dart';
+
+class PermissionService {
+  static Future<PermissionStatus> get storagePermissionStatus =>
+      Permission.manageExternalStorage.status;
+
+  static Future<PermissionStatus> get requestStoragePermission =>
+      Permission.manageExternalStorage.request();
+}

lib/service/storage.dart

@@ -4,6 +4,7 @@ import 'package:shared_preferences/shared_preferences.dart';
 
 import '../model/bookmark.dart';
 import '../model/collection.dart';
+import 'json_file_service.dart';
 
 class Storage {
   static const String _bookmarksKey = 'bookmarks';
@@ -163,4 +164,20 @@ class Storage {
     }
     return _prefsWithCache!;
   }
+
+  static Future<bool> exportToJsonFile() => JsonFileService.exportToJson(
+    collections: loadCollections(),
+    bookmarks: loadBookmarks(),
+  );
+
+  static Future<bool> importFromJsonFile() async {
+    final import = await JsonFileService.importFromJson();
+
+    if (import.bookmarks.isNotEmpty || import.collections.isNotEmpty) {
+      saveBookmarks(import.bookmarks);
+      saveCollections(import.collections);
+      return true;
+    }
+    return false;
+  }
 }

lib/widgets/edit_dialog_widgets/edit_dialog_title.dart

@@ -1,6 +1,8 @@
 import 'package:flutter/material.dart' show TextButton, Theme;
 import 'package:flutter/widgets.dart';
 
+import '../../l10n/app_localizations.dart';
+
 class EditDialogTitle extends StatelessWidget {
   const EditDialogTitle({
     super.key,
@@ -15,11 +17,10 @@ class EditDialogTitle extends StatelessWidget {
     return Row(
       mainAxisAlignment: MainAxisAlignment.spaceBetween,
       children: [
-        // TODO: Localize
         if (dialogType == DialogType.bookmark)
-          Text('Create Bookmark')
+          Text(AppLocalizations.of(context)!.createBookmark)
         else
-          Text('Create Collection'),
+          Text(AppLocalizations.of(context)!.createCollection),
 
         if (onDeletePressed != null)
           TextButton(
@@ -28,7 +29,7 @@ class EditDialogTitle extends StatelessWidget {
               Navigator.of(context).pop();
             },
             child: Text(
-              'Delete',
+              AppLocalizations.of(context)!.delete,
               style: TextStyle(color: Theme.of(context).colorScheme.error),
             ),
           ),

pubspec.lock

@@ -49,6 +49,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.19.1"
+  cross_file:
+    dependency: transitive
+    description:
+      name: cross_file
+      sha256: "701dcfc06da0882883a2657c445103380e53e647060ad8d9dfb710c100996608"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.3.5+1"
   csslib:
     dependency: transitive
     description:
@@ -89,6 +97,70 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "7.0.1"
+  file_selector:
+    dependency: "direct main"
+    description:
+      name: file_selector
+      sha256: bd15e43e9268db636b53eeaca9f56324d1622af30e5c34d6e267649758c84d9a
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.0"
+  file_selector_android:
+    dependency: transitive
+    description:
+      name: file_selector_android
+      sha256: "51e8fd0446de75e4b62c065b76db2210c704562d072339d333bd89c57a7f8a7c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.5.2+4"
+  file_selector_ios:
+    dependency: transitive
+    description:
+      name: file_selector_ios
+      sha256: e2ecf2885c121691ce13b60db3508f53c01f869fb6e8dc5c1cfa771e4c46aeca
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.5.3+5"
+  file_selector_linux:
+    dependency: transitive
+    description:
+      name: file_selector_linux
+      sha256: "2567f398e06ac72dcf2e98a0c95df2a9edd03c2c2e0cacd4780f20cdf56263a0"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.9.4"
+  file_selector_macos:
+    dependency: transitive
+    description:
+      name: file_selector_macos
+      sha256: "5e0bbe9c312416f1787a68259ea1505b52f258c587f12920422671807c4d618a"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.9.5"
+  file_selector_platform_interface:
+    dependency: transitive
+    description:
+      name: file_selector_platform_interface
+      sha256: "35e0bd61ebcdb91a3505813b055b09b79dfdc7d0aee9c09a7ba59ae4bb13dc85"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.7.0"
+  file_selector_web:
+    dependency: transitive
+    description:
+      name: file_selector_web
+      sha256: c4c0ea4224d97a60a7067eca0c8fd419e708ff830e0c83b11a48faf566cec3e7
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.9.4+2"
+  file_selector_windows:
+    dependency: transitive
+    description:
+      name: file_selector_windows
+      sha256: "62197474ae75893a62df75939c777763d39c2bc5f73ce5b88497208bc269abfd"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.9.3+5"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -253,6 +325,54 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.3.0"
+  permission_handler:
+    dependency: "direct main"
+    description:
+      name: permission_handler
+      sha256: bc917da36261b00137bbc8896bf1482169cd76f866282368948f032c8c1caae1
+      url: "https://pub.dev"
+    source: hosted
+    version: "12.0.1"
+  permission_handler_android:
+    dependency: transitive
+    description:
+      name: permission_handler_android
+      sha256: "1e3bc410ca1bf84662104b100eb126e066cb55791b7451307f9708d4007350e6"
+      url: "https://pub.dev"
+    source: hosted
+    version: "13.0.1"
+  permission_handler_apple:
+    dependency: transitive
+    description:
+      name: permission_handler_apple
+      sha256: f000131e755c54cf4d84a5d8bd6e4149e262cc31c5a8b1d698de1ac85fa41023
+      url: "https://pub.dev"
+    source: hosted
+    version: "9.4.7"
+  permission_handler_html:
+    dependency: transitive
+    description:
+      name: permission_handler_html
+      sha256: "38f000e83355abb3392140f6bc3030660cfaef189e1f87824facb76300b4ff24"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.1.3+5"
+  permission_handler_platform_interface:
+    dependency: transitive
+    description:
+      name: permission_handler_platform_interface
+      sha256: eb99b295153abce5d683cac8c02e22faab63e50679b937fa1bf67d58bb282878
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.3.0"
+  permission_handler_windows:
+    dependency: transitive
+    description:
+      name: permission_handler_windows
+      sha256: "1a790728016f79a41216d88672dbc5df30e686e811ad4e698bfc51f76ad91f1e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.1"
   platform:
     dependency: transitive
     description:
@@ -499,5 +619,5 @@ packages:
     source: hosted
     version: "1.1.0"
 sdks:
-  dart: ">=3.9.2 <4.0.0"
+  dart: ">=3.10.0 <4.0.0"
-  flutter: ">=3.35.0"
+  flutter: ">=3.38.0"

pubspec.yaml

@@ -21,6 +21,8 @@ dependencies:
   flutter_localizations:
     sdk: flutter
   intl: any
+  permission_handler: ^12.0.1
+  file_selector: ^1.1.0
 
 dev_dependencies:
   flutter_test: