String generateUuidV4()

in lib/src/util/uuid.dart [14:32]

• 14 lines of code
• 1 McCabe index (conditional complexity)

String generateUuidV4() {
  final random = Random();

  int _generateBits(int bitCount) => random.nextInt(1 << bitCount);

  String _printDigits(int value, int count) =>
      value.toRadixString(16).padLeft(count, '0');
  String _bitsDigits(int bitCount, int digitCount) =>
      _printDigits(_generateBits(bitCount), digitCount);

  // Generate xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx / 8-4-4-4-12.
  var special = 8 + random.nextInt(4);

  return '${_bitsDigits(16, 4)}${_bitsDigits(16, 4)}-'
      '${_bitsDigits(16, 4)}-'
      '4${_bitsDigits(12, 3)}-'
      '${_printDigits(special, 1)}${_bitsDigits(12, 3)}-'
      '${_bitsDigits(16, 4)}${_bitsDigits(16, 4)}${_bitsDigits(16, 4)}';
}