extension StringExtensions on String {
  String substringAfter(String pattern) {
    final startIndex = indexOf(pattern);
    if (startIndex == -1) return substring(0);

    final start = startIndex + pattern.length;
    return substring(start);
  }

  String substringBefore(String pattern) {
    final endIndex = indexOf(pattern);
    if (endIndex == -1) return substring(0);

    return substring(0, endIndex);
  }

  String substringBeforeLast(String pattern) {
    final endIndex = lastIndexOf(pattern);
    if (endIndex == -1) return substring(0);

    return substring(0, endIndex);
  }
}

extension LetExtension<T> on T {
  R let<R>(R Function(T) block) {
    return block(this);
  }
}