fromError<S> static method

ValueResult<S> fromError<S>(dynamic exceptionOrError)

Creates a failure result from a DioException or any exception object.

Extracts error message from response body following TsdTech API conventions:

• Checks error.message or error.title

• Falls back to data['message'] or data['detail']

• Handles list responses by taking first element

• Falls back to exception.toString() as last resort

• exceptionOrError: The exception or error object to convert

• Returns: A ValueResult with extracted error message

Implementation

static ValueResult<S> fromError<S>(dynamic exceptionOrError) {
  String? title;
  String errorMessage = 'Ocorreu um erro desconhecido.';

  try {
    final data = exceptionOrError?.response?.data;
    final error = data?['error'];
    if (error is Map) {
      final Map<String, dynamic> errorMap = error as Map<String, dynamic>;
      final Map<String, dynamic>? dataMap = data as Map<String, dynamic>?;
      final String? titleValue =
          errorMap['title'] as String? ?? dataMap?['title'] as String?;
      title = titleValue;
      final String errorMsg =
          (errorMap['message'] ?? dataMap?['message'] ?? errorMessage)
              as String;
      errorMessage = errorMsg;
    } else if (error is String) {
      errorMessage = error;
    } else if (data is Map) {
      if (data['message'] is String) {
        title = data['title'] as String?;
        errorMessage = data['message'] as String;
      } else if (data['detail'] is String) {
        errorMessage = data['detail'] as String;
      } else if (data['detail'] is List &&
          (data['detail'] as List).isNotEmpty) {
        final first = (data['detail'] as List).first;
        errorMessage = first is String ? first : first.toString();
      }
    }
    if (errorMessage == 'Ocorreu um erro desconhecido.' &&
        (exceptionOrError is Exception || exceptionOrError is Error)) {
      errorMessage = exceptionOrError.toString();
    } else if (errorMessage == 'Ocorreu um erro desconhecido.' &&
        exceptionOrError?.message != null) {
      errorMessage = exceptionOrError.message.toString();
    }
  } catch (_) {
    if (exceptionOrError != null) {
      errorMessage = exceptionOrError.toString();
    }
  }

  return ValueResult<S>.failure(errorMessage, title: title);
}