TimeUnitDuration.fromString constructor

Implementation

TimeUnitDuration.fromString(String str) {
  String tudString = str.toString().trim();
  List<dynamic> matches = [
    ...RegExp(r'\d+|[A-Za-z]+')
        .allMatches(tudString)
        .map((match) => match[0]!)
        .map((string) => int.tryParse(string) ?? string)
  ];
  int? amt;
  String? time;
  if (matches.length >= 2 &&
      matches[0].runtimeType == int &&
      matches[1].runtimeType == String) {
    amt = matches[0]!;
    time = matches[1]!;
  }
  if (amt == null || time == null) {
    amount = 0;
    timeUnit = TimeUnit.millisecond;
  } else {
    switch (time.trim().toLowerCase()) {
      case 'ms':
      case 'millisecond':
      case 'milliseconds':
        amount = amt;
        timeUnit = TimeUnit.millisecond;
        break;
      case 's':
      case 'sec':
      case 'second':
      case 'seconds':
        amount = amt;
        timeUnit = TimeUnit.second;
        break;
      case 'm':
      case 'min':
      case 'minute':
      case 'minutes':
        amount = amt;
        timeUnit = TimeUnit.minute;
        break;
      case 'h':
      case 'hr':
      case 'hour':
      case 'hours':
        amount = amt;
        timeUnit = TimeUnit.hour;
        break;
      case 'd':
      case 'day':
      case 'days':
        amount = amt;
        timeUnit = TimeUnit.day;
        break;
      case 'w':
      case 'week':
      case 'weeks':
        amount = amt;
        timeUnit = TimeUnit.week;
        break;
      case 'mo':
      case 'month':
      case 'months':
        amount = amt;
        timeUnit = TimeUnit.month;
        break;
      case 'y':
      case 'yr':
      case 'year':
      case 'years':
        amount = amt;
        timeUnit = TimeUnit.year;
        break;
      default:
        amount = 0;
        timeUnit = TimeUnit.millisecond;
        break;
    }
  }
}