@valkyriestudios/validator/esm/functions/vCron.js

A lightweight configurable javascript validator

import { isIntGt, isIntBetween } from '@valkyriestudios/utils/number';
const RGX_DIGITS = /^\d+$/;
function isSubpart(part, min, max) {
    if (!RGX_DIGITS.test(part))
        return null;
    const normalized = parseFloat(part);
    return isIntBetween(normalized, min, max) ? normalized : null;
}
function isPart(part, min, max) {
    if (part === '*') {
        return true;
    }
    else if (part.indexOf('/') > -1) {
        const [base, stepStr] = part.split('/', 2);
        const step = parseFloat(stepStr);
        if (!isIntGt(step, 0) || !isIntBetween(step, min, max))
            return false;
        if (base === '*')
            return true;
        let start = min;
        let end = max;
        if (base.indexOf('-') > -1) {
            const chunks = base.split('-');
            if (chunks.length !== 2)
                return false;
            start = isSubpart(chunks[0], min, max);
            end = isSubpart(chunks[1], min, max);
        }
        else {
            start = isSubpart(base, min, max);
        }
        if (start === null || end === null)
            return false;
        if (start > end)
            return false;
        if (step > (end - start))
            return false;
        return true;
    }
    else if (part.indexOf('-') > -1) {
        const chunks = part.split('-');
        if (chunks.length !== 2)
            return false;
        const start = isSubpart(chunks[0], min, max);
        const end = isSubpart(chunks[1], min, max);
        if (start === null || end === null)
            return false;
        return start < end;
    }
    else if (part.indexOf(',') > -1) {
        const chunks = part.split(',');
        for (let i = 0; i < chunks.length; i++) {
            if (isSubpart(chunks[i], min, max) === null)
                return false;
        }
        return true;
    }
    else {
        return isSubpart(part, min, max) !== null;
    }
}
function vCron(val) {
    if (typeof val !== 'string')
        return false;
    const parts = val.split(' ', 6);
    return (parts.length === 5 &&
        isPart(parts[0], 0, 59) &&
        isPart(parts[1], 0, 23) &&
        isPart(parts[2], 1, 31) &&
        isPart(parts[3], 1, 12) &&
        isPart(parts[4], 0, 6));
}
export { vCron, vCron as default };