checkValidity method

@override void checkValidity()

Classes can implement this to check the validity.

If the component missed required information, throw a FormatException with details.

Implementation

@override
void checkValidity() {
  super.checkValidity();
  checkMandatoryProperty(TextProperty.propertyNameTimezoneId);
  if (children.isEmpty) {
    throw const FormatException(
        'A valid VTIMEZONE requires at least one STANDARD or one DAYLIGHT sub-component');
  }
  var numberOfStandardChildren = 0, numberOfDaylightChildren = 0;
  for (final phase in children) {
    if (phase.componentType == VComponentType.timezonePhaseStandard) {
      numberOfStandardChildren++;
    } else if (phase.componentType == VComponentType.timezonePhaseDaylight) {
      numberOfDaylightChildren++;
    }
  }
  if (numberOfStandardChildren == 0 && numberOfDaylightChildren == 0) {
    throw const FormatException(
        'A valid VTIMEZONE requires at least one STANDARD or one DAYLIGHT sub-component');
  }
}