// Run a function at the interval set by a cron expression
let job = Cron('* * * * * *', () => {
    console.log('This will run every second');
});

// Control execution
// job.pause();
// job.resume();
// job.stop();

// Get info
let next = job.next();
let previous = job.previous();

// What date is next sunday?
let nextSunday = Cron('0 0 0 * * 7').next();
console.log(nextSunday.toLocaleDateString());

// How many days left to christmas eve?
let msLeft = Cron('59 59 23 24 DEC *').next() - new Date();
console.log(Math.floor(msLeft/1000/3600/24) + " days left to next christmas eve");

// ESM Import
import Cron from "croner";

// ... or

// CommonJS Require

const Cron = require("croner");

// Run a function each second
Cron('* * * * * *', () => {
    console.log('This will run every second');
});

// Find next month
let nextMonth = Cron('0 0 0 1 * *').next(),
    nextSunday = Cron('0 0 0 * * 7').next(),
    nextSaturday29feb = Cron("0 0 0 29 2 6").next();

console.log("First day of next month: " +  nextMonth.toLocaleDateString());
console.log("Next sunday: " +  nextSunday.toLocaleDateString());
console.log("Next saturday at 29th of february: " +  nextSaturday29feb.toLocaleDateString());  // 2048-02-29

// Run a function the first five seconds of a minute
Cron('0-4 */5 1,2,3 * JAN-MAR SAT', function () {
    console.log('This will run the first five seconds every fifth minute of hour 1,2 and 3 every saturday in January to March');
});

// Run every minute, if you pass 5 sections to croner, seconds will default to 0
// * * * * * is equivalent to 0 * * * * *
var job = Cron(
    '* * * * *', 
    { 
        maxRuns: Infinity, 
        startAt: "2021-11-01 00:00:00", 
        stopAt: "2021-12-01 00:00:00",
        timezone: "Europe/Stockholm"
    },
    function() {
        console.log('This will run every minute, from 2021-11-01 to 2021-12-01 00:00:00 in Europe/Stockholm.');
    }
);

let job = Cron('* * * * * *', () => {
    console.log('This will run every second. Pause on second 10. Resume on second 15. And quit on second 20.');
    console.log('Current second: ', new Date().getSeconds());
    console.log('Previous run: ' + job.previous());
    console.log('Next run: ' + job.next());
});

Cron('10 * * * * *', {maxRuns: 1}, () => job.pause());
Cron('15 * * * * *', {maxRuns: 1}, () => job.resume());
Cron('20 * * * * *', {maxRuns: 1}, () => job.stop());

var job = Cron( <string pattern> [, { startAt: <date|string>, stopAt: <date|string>, maxRuns: <integer>, timezone: <string> } ] [, <function job> ] );

job.next( [ <date previous> ] );
job.msToNext( [ <date previous> ] );
job.previous();
job.schedule( <fn job> );
job.pause();
job.resume();
job.stop();