String formatRelativeTime(DateTime timestamp) {
  final difference = DateTime.now().toUtc().difference(timestamp.toUtc());

  if (difference.inMinutes < 1) {
    return "Just now";
  }
  if (difference.inHours < 1) {
    return "${difference.inMinutes}m";
  }
  if (difference.inDays < 1) {
    return "${difference.inHours}h";
  }
  if (difference.inDays < 7) {
    return "${difference.inDays}d";
  }

  final weeks = difference.inDays ~/ 7;
  return "${weeks}w";
}