@bitblit/ratchet-epsilon-common/lib/util/cron-util.js

Tiny adapter to simplify building API gateway Lambda APIS

import { RequireRatchet } from '@bitblit/ratchet-common/lang/require-ratchet';
import { ErrorRatchet } from '@bitblit/ratchet-common/lang/error-ratchet';
import { StringRatchet } from '@bitblit/ratchet-common/lang/string-ratchet';
import { DateTime } from 'luxon';
export class CronUtil {
    static everyNMinuteFilter(n) {
        return CronUtil.everyNElementFilter(n, 60);
    }
    static everyNDaysOfYearFilter(n) {
        return CronUtil.everyNElementFilter(n, 365);
    }
    static everyNElementFilter(n, m) {
        RequireRatchet.notNullOrUndefined(n);
        RequireRatchet.notNullOrUndefined(m);
        const half = Math.floor(m / 2);
        if (!n || n < 2 || n > half || m % n !== 0) {
            ErrorRatchet.throwFormattedErr('Invalid config - this function only makes sense for 2 < N < %d and %d evenly divisible by N', half, m);
            throw new Error('Invalid config - this function only makes sense for 2 < N < 31 and 60 evenly divisible by N');
        }
        const rval = [];
        for (let i = 0; i < 60; i += n) {
            rval.push(i);
        }
        return rval;
    }
    static numberMatchesFilter(num, filter) {
        return !filter || filter.length === 0 || filter.includes(num);
    }
    static eventMatchesEntry(event, entry, cfg, testTimeEpochMS = new Date().getTime()) {
        let rval = false;
        if (!!event && !!entry && !!cfg.timezone) {
            if (!!event.resources && event.resources.length > 0) {
                const eventSourceName = event.resources[0];
                const targetTZ = StringRatchet.trimToNull(entry.overrideTimezone) || cfg.timezone;
                const nowInTZ = DateTime.fromMillis(testTimeEpochMS).setZone(targetTZ);
                rval = !entry.eventFilter || entry.eventFilter.test(eventSourceName);
                rval = rval && CronUtil.numberMatchesFilter(nowInTZ.minute, entry.minuteFilter);
                rval = rval && CronUtil.numberMatchesFilter(nowInTZ.hour, entry.hourFilter);
                rval = rval && CronUtil.numberMatchesFilter(nowInTZ.weekday, entry.dayOfWeekFilter);
                rval = rval && CronUtil.numberMatchesFilter(nowInTZ.day, entry.dayOfMonthFilter);
                rval = rval && CronUtil.numberMatchesFilter(nowInTZ.month, entry.monthOfYearFilter);
                rval = rval && (!entry.contextMatchFilter || entry.contextMatchFilter.test(StringRatchet.trimToEmpty(cfg.context)));
                rval = rval && (!entry.contextNoMatchFilter || !entry.contextNoMatchFilter.test(StringRatchet.trimToEmpty(cfg.context)));
            }
        }
        return rval;
    }
    static cronEntryName(entry, idx = null) {
        RequireRatchet.notNullOrUndefined(entry);
        let rval = null;
        if (entry) {
            rval = entry.name;
            rval = rval || entry['backgroundTaskType'];
            if (!rval && !!entry['directHandler']) {
                if (idx) {
                    rval = 'Direct Entry ' + idx;
                }
                else {
                    rval = 'Direct Entry (No idx specified)';
                }
            }
        }
        else {
            rval = 'ERROR: no entry passed';
        }
        return rval;
    }
}
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