parse method

@override Decimal? parse(String? value)

Implementation

@override
Decimal? parse(String? value) {
  Decimal decimal = Decimal(precision: precision);

  if (value == null || value.isEmpty) {
    return decimal;
  }

  bool isNegative = value.startsWith('-');

  String newValue = value.replaceAll('-', '');

  int sepPos = newValue.indexOf(decimalSeparator);

  String integerPart = '0';
  String decimalPart = '0';

  if (sepPos < 0) {
    integerPart = newValue;
  } else if (sepPos == 0) {
    decimalPart = _internalStrip(newValue);
  } else {
    integerPart = _internalStrip(newValue.substring(0, sepPos));
    decimalPart = _internalStrip(newValue.substring(sepPos));
  }

  if (decimalPart.length > precision) {
    decimalPart = decimalPart.substring(0, precision);
  }

  String str = '${isNegative ? '-' : ''}$integerPart.$decimalPart';

  decimal.doubleValue = double.tryParse(str) ?? 0;

  return decimal;
}