RecurrenceRule.fromString constructor

RecurrenceRule.fromString(String rrule)

Initialize a RecurrenceRule based on a rrule string.

Implementation

factory RecurrenceRule.fromString(String rrule) {
  var str = rrule.substring(rrule.indexOf('RRULE:') + 6);
  var parameters = <String, String>{};
  str.split(';').forEach((element) {
    var par = element.split('=');
    parameters[par[0]] = par[1];
  });

  var frequency = Frequency.DAILY;
  for (var element in Frequency.values) {
    if (element.name == parameters['FREQ']) frequency = element;
  }

  var end = End.never();
  int interval = 1;
  parameters.forEach((key, value) {
    switch (key) {
      case 'INTERVAL':
        interval = int.tryParse(value) ?? 1;
        break;
      case 'UNTIL':
        end = End.until(Duration(milliseconds: int.tryParse(value) ?? 1));
        break;
      case 'COUNT':
        end = End.count(int.tryParse(value) ?? 1);
        break;
      default:
    }
  });

  return RecurrenceRule(frequency, interval: interval, end: end);
}