A descriptive datetime extension

datetime_description_extension.dart

extension DescribeDateTime on DateTime {
  void describe() {
    final now = DateTime.now();
    final difference = this.difference(DateTime(now.year, now.month, now.day));

    String description = switch (difference) {
      Duration(inDays: 0) => 'today',
      Duration(inDays: -1) => 'yesterday',
      Duration(inDays: 1) => 'tomorrow',
      Duration(inDays: int d, isNegative: false) => "$d days from now",
      Duration(inDays: int d, isNegative: true) => "${d.abs()} days ago",
    };

    print('$year/$month/$day is $description');
  }
}

void main() {
  DateTime.now().describe(); // Should print 2023/6/1 is today
  DateTime(2023, 5, 31).describe(); // Should print 2023/5/31 is yesterday 
  DateTime(2023, 5, 28).describe(); // Should print 2023/5/28 is 4 days ago
  DateTime(2023, 6, 2).describe();  // Should print 2023/6/2 is tomorrow
  DateTime(2023, 6, 30).describe(); // Should print 2023/6/30 is 29 days from now
}

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