quartzcron/dist/nextGen.js

version: `0.1.0` [CHANGELOG](https://github.com/fedeghe/quartzcron/blob/master/CHANGELOG.md)

/*
quartzcron (v.0.1.0)
*/
const {
    solve_dom,
    solve_dow,
} = require('./dateutils');

function* generateDates(base, years, months, dom, dow, hours, minutes, seconds) {
    for (const year of years)
        for (const month of months)
            yield* generateDatesForMonth(base, year, month, dom, dow, hours, minutes, seconds);// month is 1-based
}

function* generateDatesForMonth(base, year, month, dom, dow, hours, minutes, seconds) {
    let daysInMonth; 
    if (dom !== '?') {
        daysInMonth = solve_dom(year, month, dom);
    } else
    /* istanbul ignore else */
    if (dow !== '?') {
        daysInMonth = solve_dow(year, month, dow);
    }
    for (let i = 0, l = daysInMonth.length; i < l; i++)
        yield* generateDatesForDay(base, year, month, daysInMonth[i], hours, minutes, seconds);
}

function* generateDatesForDay(base, year, month, day, hours, minutes, seconds) {
    for (const hour of hours)
        for (const minute of minutes)
            for (const second of seconds) {
                /* istanbul ignore else */
                if (+base < Date.UTC(year,month-1, day, hour , minute, second))
                yield new Date(Date.UTC(year, month-1, day, hour, minute, second)); // month is 0-based here
            }
}

module.exports = {
    generateDates
};