validate method

@override bool validate(dynamic value, [ List<String>? options ])

Validates whether the provided value is a valid date in the format YYYY-MM-DD.

The value parameter is the input to be validated. It can be of any type. The options parameter is an optional list of strings that can be used for additional validation options.

Returns true if the value matches the date format YYYY-MM-DD, otherwise returns false.

Implementation

@override
bool validate(dynamic value, [List<String>? options]) {
  if (value == null) return false; // Return false if the value is null.
  // Check if the value matches the regular expression for the date format YYYY-MM-DD.
  return RegExp(r'^\d{4}-\d{2}-\d{2}$').hasMatch(value.toString());
}