DateMessage class

A message container for validation errors related to date values.

The DateMessage class provides predefined error messages for date-based validations, such as checking if a date is before or after another date, falls within a range, or occurs on a weekday or weekend.

Example

final dateMessage = DateMessage(
  after: 'The date must be after the given date',
  before: 'The date must be before the given date',
  betweenDates: (min, max) => 'The date must be between ${min.toIso8601String()} and ${max.toIso8601String()}',
  weekday: 'The date must be a weekday',
  weekend: 'The date must be a weekend',
);

print(dateMessage.after); // 'The date must be after the given date'
print(dateMessage.before); // 'The date must be before the given date'
print(dateMessage.betweenDates(DateTime(2025, 1, 1), DateTime(2025, 12, 31)));
// 'The date must be between 2025-01-01T00:00:00.000 and 2025-12-31T00:00:00.000'