-added localdatabase.

lib/data/local/constants.dart

@@ -1,19 +1,16 @@
 class DBConstants {
  DBConstants._();
  // Store Name
- static const String STORE_NAME = 'homebox';
  static const String USER_INFO_STORE = 'userInfo';
- static const String EVENT_HISTORY = 'eventHistory';
- static const String FIXEDCODE_STORE = 'fixcode';
- static const String NOTIFICATION_STORE = 'notification';
- static const String STATUS_STORE = 'status';
- static const String ACCESS_STORE = 'access';
- static const String HISTORY_STORE = 'history';
- static const String LOGS_STORE = 'logs';
+
 
  // DB Name
- static const DB_NAME = 'homebox.db';
+ static const DB_NAME = 'technologies.db';
 
  // Fields
  static const FIELD_ID = 'id';
-}
+}
+
+// local db
+//view model and provider stuff
+// UI and widgets and designs

lib/di/modules/local_module.dart

@@ -0,0 +1,39 @@
+import 'dart:async';
+import 'package:path/path.dart';
+import 'package:path_provider/path_provider.dart';
+import 'package:sembast/sembast.dart';
+import 'package:sembast/sembast_io.dart';
+import 'package:technologies_login_example/data/local/constants.dart';
+import 'package:technologies_login_example/utils/encryption/xxtea.dart';
+
+import 'netwok_module.dart';
+
+abstract class LocalModule extends NetworkModule {
+ ///
+ /// Calling it multiple times will return the same instance.
+
+ static Future<Database> provideDatabase() async {
+ // Key for encryption
+ var encryptionKey = "";
+
+ // Get a platform-specific directory where persistent app data can be stored
+ final appDocumentDir = await getApplicationDocumentsDirectory();
+
+ // Path with the form: /platform-specific-directory/demo.db
+ final dbPath = join(appDocumentDir.path, DBConstants.DB_NAME);
+
+ // Check to see if encryption is set, then provide codec
+ // else init normal db with path
+ Database database;
+ if (encryptionKey.isNotEmpty) {
+ // Initialize the encryption codec with a user password
+ var codec = getXXTeaCodec(password: encryptionKey);
+ database = await databaseFactoryIo.openDatabase(dbPath, codec: codec);
+ } else {
+ database = await databaseFactoryIo.openDatabase(dbPath);
+ }
+
+ // Return database instance
+ return database;
+ }
+}

lib/utils/encryption/xxtea.dart

@@ -0,0 +1,63 @@
+import 'dart:convert';
+
+import 'package:sembast/sembast.dart';
+import 'package:xxtea/xxtea.dart';
+
+class _XXTeaEncoder extends Converter<Map<String, dynamic>, String> {
+ final String key;
+
+ _XXTeaEncoder(this.key);
+
+ @override
+ String convert(Map<String, dynamic> input) =>
+ xxtea.encryptToString(json.encode(input), key)!;
+}
+
+class _XXTeaDecoder extends Converter<String, Map<String, dynamic>> {
+ final String key;
+
+ _XXTeaDecoder(this.key);
+
+ @override
+ Map<String, dynamic> convert(String input) {
+ var result = json.decode(xxtea.decryptToString(input, key)!);
+ if (result is Map) {
+ return result.cast<String, dynamic>();
+ }
+ throw FormatException('invalid input $input');
+ }
+}
+
+/// Simple encryption codec using xxtea
+/// It requires a password to encrypt/decrypt the data
+class _XXTeaCodec extends Codec<Map<String, dynamic>, String> {
+ late _XXTeaEncoder _encoder;
+ late _XXTeaDecoder _decoder;
+
+ /// A non null [password] to use for the encryption/decryption
+ _XXTeaCodec(String password) {
+ _encoder = _XXTeaEncoder(password);
+ _decoder = _XXTeaDecoder(password);
+ }
+
+ @override
+ Converter<String, Map<String, dynamic>> get decoder => _decoder;
+
+ @override
+ Converter<Map<String, dynamic>, String> get encoder => _encoder;
+}
+
+/// Create a codec to use when opening an encrypted sembast database
+///
+/// The usage is then
+///
+/// ```dart
+/// // Initialize the encryption codec with a user password
+/// var codec = getXXTeaCodec(password: '[your_user_password]');
+/// // Open the database with the codec
+/// Database db = await factory.openDatabase(dbPath, codec: codec);
+///
+/// // ...your database is ready to use as encrypted
+/// ```
+SembastCodec getXXTeaCodec({required String password}) =>
+ SembastCodec(signature: 'xxtea', codec: _XXTeaCodec(password));

pubspec.lock

@@ -282,13 +282,41 @@ packages:
  url: "https://pub.dartlang.org"
  source: hosted
  version: "1.8.0"
+ path_provider:
+ dependency: "direct main"
+ description:
+ name: path_provider
+ url: "https://pub.dartlang.org"
+ source: hosted
+ version: "2.0.11"
+ path_provider_android:
+ dependency: transitive
+ description:
+ name: path_provider_android
+ url: "https://pub.dartlang.org"
+ source: hosted
+ version: "2.0.14"
+ path_provider_ios:
+ dependency: transitive
+ description:
+ name: path_provider_ios
+ url: "https://pub.dartlang.org"
+ source: hosted
+ version: "2.0.9"
  path_provider_linux:
  dependency: transitive
  description:
  name: path_provider_linux
  url: "https://pub.dartlang.org"
  source: hosted
  version: "2.1.7"
+ path_provider_macos:
+ dependency: transitive
+ description:
+ name: path_provider_macos
+ url: "https://pub.dartlang.org"
+ source: hosted
+ version: "2.0.6"
  path_provider_platform_interface:
  dependency: transitive
  description:
@@ -497,6 +525,13 @@ packages:
  url: "https://pub.dartlang.org"
  source: hosted
  version: "0.2.0+1"
+ xxtea:
+ dependency: "direct main"
+ description:
+ name: xxtea
+ url: "https://pub.dartlang.org"
+ source: hosted
+ version: "2.1.0"
  yaml:
  dependency: transitive
  description:
@@ -506,4 +541,4 @@ packages:
  version: "3.1.1"
 sdks:
  dart: ">=2.16.2 <3.0.0"
- flutter: ">=2.8.0"
+ flutter: ">=2.8.1"

pubspec.yaml

@@ -49,6 +49,10 @@ dependencies:
  # Database
  sembast: ^3.2.0+1
 
+ # Path Provider
+ path_provider: ^2.0.11
+ # Encryption
+ xxtea: ^2.1.0
 dev_dependencies:
  flutter_test:
  sdk: flutter