iso_duration

Description:

iso duration

Dart package for parsing and generating ISO 8601 duration strings, to and from Dart's Duration instances.
Usage #
Duration? duration1 = tryParseIso8601Duration('PT1H24M');
print(duration1); // Prints `1:24:00.000000`
print(duration1?.toIso8601String()); // Prints `PT1H24M`

final duration2 = tryParseIso8601Duration('-P1W4DT22H8.5M');
print(duration2); // Prints `-286:08:30.000000`
print(duration2?.toIso8601String()); // Prints `-P1W4DT22H8M30S`

Duration duration3 = parseIso8601Duration('PT0,8S');
print(duration3); // Prints `0:00:00.800000`
print(duration3.toIso8601String()); // Prints `PT0.8S`
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Additional information #
Implements a subset of the ISO 8601 Durations syntax as described in Wikipedia (8/2023).

Minus sign is only allowed in the beginning of the duration string, e.g. -PT1H.
Only one decimal fraction is allowed and only in the last component, e.g. PT1H34.5M or PT1H34,5M
Number of days per month and year are fixed, 30 and 365 days respectively.
Combined date and time representations, e.g. P0003-06-04T12:30:05, are not supported.
When generating duration strings, the largest unit in the returned string is weeks.