parseSize function

int parseSize(String input)

Implementation

int parseSize(String input) {
  if (input.isEmpty) {
    throw FormatException('Size cannot be empty');
  }
  final pattern = RegExp(r'^(\d+(?:\.\d+)?)([KMG]B)$', caseSensitive: false);
  final match = pattern.firstMatch(input.trim());

  if (match == null) {
    throw FormatException(
        'Invalid size format: $input. Use formats like 500MB or 1GB');
  }

  final value = double.parse(match.group(1)!); // The numeric part
  if (value <= 0) {
    throw FormatException('Size must be greater than 0');
  }
  final unit = match.group(2)!.toUpperCase(); // The unit (MB, GB, etc.)

  switch (unit) {
    case 'KB':
      return (value * 1024).toInt();
    case 'MB':
      return (value * 1024 * 1024).toInt(); // Convert MB to bytes
    case 'GB':
      return (value * 1024 * 1024 * 1024).toInt(); // Convert GB to bytes
    default:
      throw FormatException('Unknown size unit: $unit');
  }
}