initial commit

lib/main.dart

@@ -0,0 +1,107 @@
+import 'package:intl/date_symbol_data_local.dart';
+import 'dart:developer';
+import 'dart:io';
+
+import 'package:flutter/material.dart';
+import 'package:path_provider/path_provider.dart';
+import 'package:timetracker/screens/main_screen.dart';
+import 'package:timetracker/src/rust/api.dart';
+import 'package:timetracker/src/rust/frb_generated.dart';
+import 'package:timetracker/time_tracking_service.dart';
+import 'package:provider/provider.dart';
+
+Future<void> main() async {
+  log("main: Start");
+  try {
+    WidgetsFlutterBinding.ensureInitialized();
+    await initializeDateFormatting('de_DE', null);
+    try {
+      await RustLib.init();
+    } catch (e) {
+      runApp(ErrorApp(error: "RustLib Init Failed: $e"));
+    }
+
+    try {
+      final dbDir = await getApplicationDocumentsDirectory();
+      await Directory(dbDir.path).create(recursive: true);
+      await initApp(dbDirectoryPath: dbDir.path);
+    } catch (e) {
+      runApp(ErrorApp(error: "Database Init Failed: $e"));
+      return;
+    }
+
+    runApp(
+      ChangeNotifierProvider(
+        create: (context) => TimeTrackingService(),
+        child: const MyApp(),
+      ),
+    );
+  } catch (e) {
+    runApp(ErrorApp(error: "Unhandled error in main: $e"));
+  }
+}
+
+class ErrorApp extends StatelessWidget {
+  final String error;
+  const ErrorApp({required this.error, Key? key}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      home: Scaffold(
+        appBar: AppBar(title: const Text("Initialization Error")),
+        body: Center(
+          child: Padding(
+            padding: const EdgeInsets.all(16.0),
+            child: Text("Could not initialize the application:\n\n$error"),
+          ),
+        ),
+      ),
+    );
+  }
+}
+
+class MyApp extends StatelessWidget {
+  const MyApp({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      title: 'Flutter Rust Time Tracker',
+      theme: ThemeData(
+        primarySwatch: Colors.blue,
+        useMaterial3: true,
+        // Optional: Theme für BottomNavigationBar anpassen
+        // bottomNavigationBarTheme: const BottomNavigationBarThemeData(
+        //   selectedItemColor: Colors.deepPurple,
+        //   unselectedItemColor: Colors.grey,
+        // ),
+      ),
+      home: const InitializerWidget(),
+    );
+  }
+}
+
+class InitializerWidget extends StatelessWidget {
+  const InitializerWidget({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    final initStatus = context.select(
+      (TimeTrackingService s) => s.isInitialized,
+    );
+    final isLoading = context.select((TimeTrackingService s) => s.isLoading);
+
+    if (isLoading) {
+      return const Scaffold(body: Center(child: CircularProgressIndicator()));
+    } else if (!initStatus) {
+      return const Scaffold(
+        body: Center(
+          child: Text("Fehler bei der Initialisierung der Datenbank."),
+        ),
+      );
+    } else {
+      return const MainScreen();
+    }
+  }
+}