secret_db 0.0.1

A Flutter package for secure encrypted database storage

example/main.dart

import 'package:flutter/material.dart';
import 'package:encrypted_db_storage/encrypted_db_storage.dart';

// Modelo de dados para o exemplo
class User {
  final String username;
  final String email;

  User({required this.username, required this.email});

  Map<String, dynamic> toJson() {
    return {
      'username': username,
      'email': email,
    };
  }

  factory User.fromJson(Map<String, dynamic> json) {
    return User(
      username: json['username'],
      email: json['email'],
    );
  }
}

void main() async {
  // Inicializa o banco de dados com parâmetros personalizados
  await EncryptedDB.init(
    dbName: "example_secure_data.db",  // Nome do banco de dados
    tableName: "user_table",          // Nome da tabela
    key: "dynamic_encryption_key",    // Chave de criptografia
  );
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Encrypted DB Storage Example',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: HomePage(),
    );
  }
}

class HomePage extends StatelessWidget {
  // Função para salvar dados simples
  void _saveSimpleData() async {
    await EncryptedDB.saveData('user_token', 'my_secure_token');
    print('User token saved!');
  }

  // Função para salvar e recuperar objeto
  void _saveAndRetrieveUser() async {
    User user = User(username: 'john_doe', email: '[e-mail]');
    
    // Serializa e salva o objeto
    String serializedUser = EncryptedDB._serialize(user);
    await EncryptedDB.saveData('user_info', serializedUser);
    print('User information saved!');
    
    // Recupera e desserializa o objeto
    String? userJson = await EncryptedDB.getData('user_info');
    if (userJson != null) {
      User retrievedUser = EncryptedDB._deserialize(userJson, (json) => User.fromJson(json));
      print('Retrieved User: ${retrievedUser.username}, ${retrievedUser.email}');
    }
  }

  // Função para excluir dados
  void _deleteUserToken() async {
    await EncryptedDB.deleteData('user_token');
    print('User token deleted!');
  }

  // Função para fechar o banco de dados
  void _closeDatabase() async {
    await EncryptedDB.closeDB();
    print('Database closed!');
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Encrypted DB Storage Example'),
      ),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            ElevatedButton(
              onPressed: _saveSimpleData,
              child: Text('Save Simple Data (Token)'),
            ),
            ElevatedButton(
              onPressed: _saveAndRetrieveUser,
              child: Text('Save and Retrieve User Info'),
            ),
            ElevatedButton(
              onPressed: _deleteUserToken,
              child: Text('Delete User Token'),
            ),
            ElevatedButton(
              onPressed: _closeDatabase,
              child: Text('Close Database'),
            ),
          ],
        ),
      ),
    );
  }
}