57 lines
1.6 KiB
Dart
57 lines
1.6 KiB
Dart
String dateRelativeToNow(DateTime date) {
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DateTime dateOnly = DateTime.utc(date.year, date.month, date.day);
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DateTime now = DateTime.now().toUtc();
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DateTime today = DateTime.utc(now.year, now.month, now.day);
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Duration diff = dateOnly.difference(today);
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return _durationToRelativeTimeString(diff);
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}
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String _durationToRelativeTimeString(Duration duration) {
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if (duration.isNegative) {
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return "${_durationApproximatedInWords(-duration)} ago";
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} else if (duration == Duration.zero) {
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return "now";
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} else {
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return "in ${_durationApproximatedInWords(duration)}";
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}
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}
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String _durationApproximatedInWords(Duration duration) {
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int seconds = duration.inSeconds;
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int minutes = duration.inMinutes;
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int hours = duration.inHours;
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int days = duration.inDays;
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int weeks = (days / 7).floor();
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int months = (days / 30).floor();
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int years = (days / 365).floor();
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int centuries = (years / 100).floor();
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if (duration == Duration.zero) {
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return "now";
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}
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if (seconds == 0) {
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return "now";
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}
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if (seconds < 60) {
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return seconds > 1 ? "$seconds seconds" : "a second";
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}
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if (minutes < 60) {
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return minutes > 1 ? "$minutes minutes" : "a minute";
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}
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if (hours < 24) {
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return hours > 1 ? "$hours hours" : "an hour";
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}
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if (days < 7) {
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return days > 1 ? "$days days" : "a day";
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}
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if (months == 0) {
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return weeks > 1 ? "$weeks weeks" : "a week";
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}
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if (years == 0) {
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return months > 1 ? "$months months" : "a month";
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}
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if (years < 100) {
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return years > 1 ? "$years years" : "a year";
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}
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return centuries > 1 ? "$centuries centuries" : "a century";
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}
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