parse method

@override Decimal? parse(String? value)

Implementation

@override
Decimal? parse(String? value) {
  if (value.isNullOrBlank) return null;

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

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

  int sepPos = newValue.indexOf(decimalSeparator);

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

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

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

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

  return Decimal(precision: precision, doubleValue: double.parse(str));
}