0.0.43 • Published 2 years ago
cron-allowed-range v0.0.43
cron-allowed-range
Use cron-like expressions to test if a datetime is in an allowed range.
Usage
API
npm install cron-allowed-range
const CronAllowedRange = require('cron-allowed-range');
/* Allowed if it is:
* - At any minute
* - Between 9 AM - 6 PM
* - On any day of the month
* - Between September to June, or on August
* - Between Monday to Friday
*/
const cr = new CronAllowedRange('* 9-17 * 9-6,8 1-5', 'America/Toronto');
cr.isDateAllowed(new Date('December 18, 1995 08:59:59 GMT-0500'));
// false
cr.isDateAllowed(new Date('August 18, 1995 17:00:00 GMT-0400'));
// true
CLI
npm install -g cron-allowed-range
cr -e '* 9-17 * * *' -t 'America/Toronto'
echo $?
# exit code is 0 if current time is within range, otherwise 1
Formatting the Cron-Like Expression
* represents any value
, separator (e.g. 5,6)
- used to define (inclusive) ranges (e.g. 5-9)
/ not supported
┌───────────── minute (0 - 59)
│ ┌───────────── hour (0 - 23)
│ │ ┌───────────── day of the month (1 - 31)
│ │ │ ┌───────────── month (1 - 12)
│ │ │ │ ┌───────────── day of the week (0 - 6) (Sunday to Saturday)
│ │ │ │ │
│ │ │ │ │
│ │ │ │ │
* * * * *
Diagram from Wikipedia
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