cron_parser

Description:

cron parser

A cron parser #
Spits out next & previous cron dates starting from now or a specific date.
Please notice that the timezone of the resulting dates are in the
same timezone provided with Cron().parse(...)
Usage #
A simple usage example:
import 'package:cron_parser/cron_parser.dart';
import 'package:timezone/timezone.dart';

main() {
// by default next cron dates are starting from the current date
var cronIterator = Cron().parse("0 * * * *", "Europe/London");
TZDateTime nextDate = cronIterator.next();
// you can retrieve the current value by using the current method
TZDateTime currentDate = cronIterator.current(); // same as nextDate
TZDateTime afterNextDate = cronIterator.next();

cronIterator = Cron().parse("0 * * * *", "Europe/London");
TZDateTime previousDate = cronIterator.previous();
// you can retrieve the current value by using the current method
TZDateTime currentDate = cronIterator.current(); // same as previousDate
TZDateTime beforePreviousDate = cronIterator.previous();
}
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Another example this time with a specific start date:
import 'package:cron_parser/cron_parser.dart';
import 'package:timezone/timezone.dart';

main() {
TZDateTime startDate = TZDateTime(getLocation("Europe/London"), 2020, 4, 01);
var cronIterator = Cron().parse("0 * * * *", "Europe/London", startDate);
TZDateTime nextDate = cronIterator.next(); // 2020-04-01 01:00:00.000+0100
TZDateTime afterNextDate = cronIterator.next(); // 2020-04-01 02:00:00.000+0100

cronIterator = Cron().parse("0 * * * *", "Europe/London", startDate);
TZDateTime previousDate = cronIterator.previous(); // 2020-03-31 23:00:00.000+0100
TZDateTime beforePreviousDate = cronIterator.previous(); // 2020-03-31 22:00:00.000+0100
}
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Links #

source code
contributors: Ronny Bubke, Nils Reichardt