flutter_vault_logger 0.1.0

Secure, encrypted on-device crash log storage with export/import and duplicate detection. Drop-in Flutter package.

example/lib/main.dart

import 'dart:io';

import 'package:flutter/material.dart';
import 'package:flutter_vault_logger/flutter_vault_logger.dart';
import 'package:hive_flutter/hive_flutter.dart';

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Hive.initFlutter();

  await CrashLogService.init(
    const VaultLoggerConfig(
      encryptionKey: '12345678901234567890123456789012',
      encryptionIV: '1234567890123456',
      fileExtension: 'vaultlog',
      maxLogCount: 200,
      expirationMinutes: 60,
    ),
  );

  runApp(const ExampleApp());
}

class ExampleApp extends StatelessWidget {
  const ExampleApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Vault Logger Example',
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.indigo),
      ),
      home: const LoggerHomePage(),
    );
  }
}

class LoggerHomePage extends StatefulWidget {
  const LoggerHomePage({super.key});

  @override
  State<LoggerHomePage> createState() => _LoggerHomePageState();
}

class _LoggerHomePageState extends State<LoggerHomePage> {
  String _status = 'Ready';
  String? _lastExportPath;

  List<CrashLogModel> get _logs => CrashLogService.getLogs();

  Future<void> _createTestError() async {
    try {
      throw StateError('Example crash at ${DateTime.now().toIso8601String()}');
    } catch (e, st) {
      await CrashLogService.logError(e, st, 'LoggerHomePage._createTestError');
      setState(() {
        _status = 'Test error captured';
      });
    }
  }

  Future<void> _exportLogs() async {
    try {
      final path = await CrashLogService.exportEncryptedLogs();
      setState(() {
        _lastExportPath = path;
        _status = 'Exported logs to: $path';
      });
    } catch (e) {
      setState(() {
        _status = 'Export failed: $e';
      });
    }
  }

  Future<void> _importLastExport() async {
    final path = _lastExportPath;
    if (path == null || !File(path).existsSync()) {
      setState(() {
        _status = 'No exported file found yet';
      });
      return;
    }

    try {
      final imported = await CrashLogService.importEncryptedLogs(path);
      await CrashLogService.saveReport(
        'Imported ${DateTime.now().toIso8601String()}',
        imported,
      );
      setState(() {
        _status = 'Imported ${imported.length} log(s) and saved report';
      });
    } catch (e) {
      setState(() {
        _status = 'Import failed: $e';
      });
    }
  }

  Future<void> _clearLogs() async {
    await CrashLogService.clearLogs();
    setState(() {
      _status = 'Cleared local logs';
    });
  }

  @override
  Widget build(BuildContext context) {
    final logs = _logs;

    return Scaffold(
      appBar: AppBar(title: const Text('flutter_vault_logger example')),
      body: Padding(
        padding: const EdgeInsets.all(16),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Text(_status),
            const SizedBox(height: 12),
            Wrap(
              spacing: 8,
              runSpacing: 8,
              children: [
                ElevatedButton(
                  onPressed: _createTestError,
                  child: const Text('Log test error'),
                ),
                ElevatedButton(
                  onPressed: _exportLogs,
                  child: const Text('Export logs'),
                ),
                ElevatedButton(
                  onPressed: _importLastExport,
                  child: const Text('Import last export'),
                ),
                ElevatedButton(
                  onPressed: _clearLogs,
                  child: const Text('Clear logs'),
                ),
              ],
            ),
            const SizedBox(height: 16),
            Text('Current log count: ${logs.length}'),
            const SizedBox(height: 8),
            Expanded(
              child: logs.isEmpty
                  ? const Center(child: Text('No logs captured yet'))
                  : ListView.builder(
                      itemCount: logs.length,
                      itemBuilder: (context, index) {
                        final log = logs[index];
                        return ListTile(
                          dense: true,
                          title: Text(
                            log.error,
                            maxLines: 1,
                            overflow: TextOverflow.ellipsis,
                          ),
                          subtitle: Text(log.timestamp.toIso8601String()),
                        );
                      },
                    ),
            ),
          ],
        ),
      ),
    );
  }
}