ghost
Version:
The professional publishing platform
27 lines (23 loc) • 805 B
JavaScript
const ValueObject = require('./shared/ValueObject');
const InvalidOfferCadence = require('../errors').InvalidOfferCadence;
/**
* @extends ValueObject<'month'|'year'>
*/
class OfferCadence extends ValueObject {
/** @param {unknown} cadence */
static create(cadence) {
if (!cadence || typeof cadence !== 'string') {
throw new InvalidOfferCadence({
message: 'Offer `cadence` must be a string.'
});
}
if (cadence !== 'month' && cadence !== 'year') {
throw new InvalidOfferCadence({
message: 'Offer `cadence` must be one of "month" or "year".'
});
}
return new OfferCadence(cadence);
}
static InvalidOfferCadence = InvalidOfferCadence;
}
module.exports = OfferCadence;