Files
Melo/lib/home_screen.dart
T
Dustin-Mike Jens HähnelandClaude Haiku 4.5 4fa8d12fa0 Fix critical data loss bugs and improve error handling
## Critical Fixes
- Fix CRITICAL-1: Empty scans no longer delete entire library
  - Use timestamp-based tombstone logic instead of path-based
  - Only mark missing if livePaths is not empty

- Fix CRITICAL-2: Re-scanned files now return from deleted state
  - Add deleted=false to SongsCompanion.insert in both scanners

## High Priority Fixes
- HIGH-1: Fix SQLite variable limit crash on large libraries
  - Replace isNotIn() with timestamp comparison (O(1) not O(n))

- HIGH-2: Fix UI freezing during scan
  - Throttle progress updates (every 50 files or end of scan)

- HIGH-3: Add error handling for scan failures
  - Wrap scanFolders/scanAndroidMediaStore in try/catch
  - Display scanError banner in LibraryScreen

- HIGH-4: Add error handling for playback failures
  - Wrap loadPlaylist in try/catch

## Medium Priority Fixes
- MEDIUM-1: Replace ! with ?? to handle unknown ProcessingState
- MEDIUM-2: Escape LIKE wildcards in search queries
- MEDIUM-4: Display StreamBuilder errors instead of treating as empty
- MEDIUM-8: Add tooltips to all IconButtons for accessibility
- Add doc comments to public database APIs

## Testing
- Add regression tests for CRITICAL-1 and CRITICAL-2
- All 9 existing tests pass

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
2026-08-16 19:04:54 +02:00

77 lines
2.3 KiB
Dart

import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import 'library/database.dart';
import 'library/library_service.dart';
import 'library/song_list.dart';
/// Startseite: zuletzt hinzugefügte Songs, sonst ein Willkommens-Hinweis.
class HomeScreen extends StatelessWidget {
const HomeScreen({super.key});
@override
Widget build(BuildContext context) {
final db = context.read<MeloDb>();
return Scaffold(
appBar: AppBar(
title: const Text('Melo',
style: TextStyle(fontWeight: FontWeight.bold, fontSize: 26)),
),
body: StreamBuilder<List<Song>>(
stream: db.watchRecent(),
builder: (context, snapshot) {
if (snapshot.hasError) {
return Center(
child: Text('Fehler: ${snapshot.error}',
style: const TextStyle(color: Colors.white54)),
);
}
final songs = snapshot.data ?? const [];
if (songs.isEmpty) return const _Welcome();
return Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
const Padding(
padding: EdgeInsets.fromLTRB(16, 8, 16, 8),
child: Text('Zuletzt hinzugefügt',
style:
TextStyle(fontSize: 18, fontWeight: FontWeight.w600)),
),
Expanded(child: SongList(songs)),
],
);
},
),
);
}
}
class _Welcome extends StatelessWidget {
const _Welcome();
@override
Widget build(BuildContext context) {
final lib = context.read<LibraryService>();
return Center(
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
const Icon(Icons.music_note, size: 72, color: Colors.white24),
const SizedBox(height: 12),
const Text('Willkommen bei Melo',
style: TextStyle(fontSize: 18)),
const SizedBox(height: 4),
const Text('Füge deine Musik hinzu, um loszulegen',
style: TextStyle(color: Colors.white54)),
const SizedBox(height: 20),
FilledButton.icon(
icon: const Icon(Icons.create_new_folder_outlined),
label: Text(addMusicLabel),
onPressed: lib.pickFolderAndScan,
),
],
),
);
}
}