public void AddPlan(string planName, string externalKey, int amountInCents, Currency currency, BillingInterval interval)
{
var existingPlanForProduct = _plans.Where(o => o.ExternalKey == externalKey)
.SingleOrDefault();
if (existingPlanForProduct == null)
{
var plan = new Plan(planName, externalKey);
plan.SetPricing(amountInCents, currency, interval);
_plans.Add(plan);
}
}
internal void SetPricing(int amountInCents, Currency currency, BillingInterval interval)
{
AmountInCents = (amountInCents >= 0) ? amountInCents : throw new ArgumentException("Invalid amount in cents");
Currency = currency ?? throw new ArgumentNullException(nameof(currency));
Interval = interval ?? throw new ArgumentNullException(nameof(interval));
}