friendlyFormatDuration function
Formats a duration in a friendly format like "1d 2h 3m 4s 5ms 6us".
Implementation
String friendlyFormatDuration(final Duration value) {
if (value == Duration.zero) return '0s';
final sign = value.isNegative ? '-' : '';
final d = _unitStr(value.inDays, null, 'd');
final h = _unitStr(value.inHours, 24, 'h');
final m = _unitStr(value.inMinutes, 60, 'm');
final s = _unitStr(value.inSeconds, 60, 's');
final ms = _unitStr(value.inMilliseconds, 1000, 'ms');
final us = _unitStr(value.inMicroseconds, 1000, 'us');
final elements = [d, h, m, s, ms, us];
final displayed = elements.where((final element) => element.isNotEmpty);
return '$sign${displayed.join(' ')}';
}