saveTransaction method

Future<String> saveTransaction(String type, Map<String, dynamic> payload)

Implementation

Future<String> saveTransaction(
  String type,
  Map<String, dynamic> payload,
) async {
  await ensureReady();

  final now = DateTime.now().toUtc();
  final request =
      (payload['request'] as Map?)?.cast<String, dynamic>() ??
      const <String, dynamic>{};
  final requestBody = (request['body'] ?? '').toString();
  String atSignHint = 'unknown';

  try {
    if (requestBody.isNotEmpty) {
      final decoded = jsonDecode(requestBody);
      if (decoded is Map && decoded['atSign'] != null) {
        atSignHint = decoded['atSign'].toString();
      }
    }
  } catch (_) {
    // Keep unknown if request body is not valid JSON.
  }

  final sanitizedAtSign = atSignHint.replaceAll(
    RegExp(r'[^A-Za-z0-9_-]'),
    '_',
  );
  final timestamp = now.toIso8601String().replaceAll(':', '-');
  final sanitizedType = type.replaceAll(RegExp(r'[^A-Za-z0-9_-]'), '_');
  final filename = '${timestamp}_${sanitizedType}_${sanitizedAtSign}.json';
  final file = File(path.join(_directory!.path, filename));

  final contents = <String, dynamic>{
    'createdAtUtc': now.toIso8601String(),
    'type': type,
    ...payload,
  };

  await file.writeAsString(
    const JsonEncoder.withIndent('  ').convert(contents),
  );
  return file.path;
}