+signup +login

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

@@ -20,6 +20,34 @@ class AuthorizationStorage {
     return TokenData.fromJson(jsonDecode(tokenJson));
   }
 
+
+  static Future<bool> _checkTokenUsable(String keyName) async {
+    final hasKey = await SecureStorageService.containsKey(keyName);
+    if (!hasKey) return false;
+
+    try {
+      final tokenData = await _getTokenData(keyName);
+      return tokenData.expiration.isAfter(DateTime.now());
+    } catch (e, st) {
+      _logger.warning('Error reading token from $keyName: $e', e, st);
+      rethrow;
+    }
+  }
+
+
+  static Future<bool> isAuthorizationStored() async {
+    _logger.fine('Checking if authorization is stored');
+
+    final accessUsable = await _checkTokenUsable(Constants.accessTokenStorageKey);
+    if (accessUsable) return true;
+
+    final refreshUsable = await _checkTokenUsable(Constants.refreshTokenStorageKey);
+    if (refreshUsable) return true;
+
+    return false;
+  }
+
+
   static Future<TokenData> getAccessToken() async {
     _logger.fine('Getting access token');
     return _getTokenData(Constants.accessTokenStorageKey);