Frontend first draft

frontend/pshared/lib/service/authorization/storage.dart

@@ -0,0 +1,53 @@
+import 'dart:convert';
+
+import 'package:logging/logging.dart';
+
+import 'package:pshared/api/errors/unauthorized.dart';
+import 'package:pshared/api/responses/token.dart';
+import 'package:pshared/config/constants.dart';
+import 'package:pshared/service/secure_storage.dart';
+
+
+class AuthorizationStorage {
+  static final _logger = Logger('service.authorization.storage');
+
+  static Future<TokenData> _getTokenData(String tokenKey) async {
+    _logger.fine('Getting token data');
+    final String? tokenJson = await SecureStorageService.get(tokenKey);
+    if (tokenJson == null || tokenJson.isEmpty) {
+      throw ErrorUnauthorized();
+    }
+    return TokenData.fromJson(jsonDecode(tokenJson));
+  }
+
+  static Future<TokenData> getAccessToken() async {
+    _logger.fine('Getting access token');
+    return _getTokenData(Constants.accessTokenStorageKey);
+  }
+
+  static Future<TokenData> getRefreshToken() async {
+    _logger.fine('Getting refresh token');
+    return _getTokenData(Constants.refreshTokenStorageKey);
+  }
+
+  static Future<void> updateToken(TokenData tokenData) async {
+    _logger.fine('Storing access token...');
+    final tokenJson = jsonEncode(tokenData.toJson());
+    await SecureStorageService.set(Constants.accessTokenStorageKey, tokenJson);
+  }
+
+  static Future<void> updateRefreshToken(TokenData tokenData) async {
+    _logger.fine('Storing refresh token...');
+    final refreshTokenJson = jsonEncode(tokenData.toJson());
+    await SecureStorageService.set(Constants.refreshTokenStorageKey, refreshTokenJson);
+  }
+
+  static Future<void> removeTokens() {
+    return Future.wait([
+      SecureStorageService.delete(Constants.refreshTokenStorageKey),
+      SecureStorageService.delete(Constants.accessTokenStorageKey),
+    ]);
+  }
+}
+
+