refs https://github.com/TryGhost/Team/issues/1236
We want to be able to use the OfferName as the name property for a
Stripe Coupon - which has a maximum character length of 40.
refs https://github.com/TryGhost/Team/issues/1163
This allows users to not provide a title for an Offer. We store the lack
of a title as `NULL` in the DB, but we will always provide a string to
the API so that the title can safely be used in HTML.
refs https://github.com/TryGhost/Team/issues/1166
Since we removed the creation of coupons from the Offers module, we must
emit events so that the Payments module can handle creating Coupons when
Offers are created.
We also export the events from the module so that they can be listened
to by the Payments module.
We also export other internals of the module so that the types can be
used.
refs https://github.com/TryGhost/Team/issues/1166
This will be handled by a payments module instead. In order to
disconnect Stripe we must delete all Stripe related data, which means an
Offer doesn't inherently have a stripe coupon id. Instead we can use a
payments service which will get/create the coupon for us when we need
it.
no-issue
This simplifies the handling of updating redirects for a code, and
doesn't affect our application layer because we never have the need to
change a code twice.
In future this should be replaced with events at the domain level - so
that we do not have to track changed properties and instead a redirect
service can listen to events, which would be dispatched on a successful
save by the repository.
refs https://github.com/TryGhost/Team/issues/1083
We combine the duration and duration_in_months into a single value
object which can be validated together, meaning we will never have
properties which are out of sync (e.g. forever durations with 2 months).
refs https://github.com/TryGhost/Team/issues/1083
We now allow creating offers for a fixed amount, rather than a
percentage. These require a currency to be passed as a fixed amount is
meaningless without one.
refs https://github.com/TryGhost/Team/issues/1083
Instead of Offers being hardcoded to the "once" duration this will allow
Admins to start creating offers of variable durations.
no-issue
This adds the concept of "Value Objects" to an Offers properties,
allowing us to move validation out and ensure that an Offer will only
ever have valid properties, without having to duplicate checks - or
leave them to the persistent layer. This means we can fail early, as
well as write unit tests for all of our validation.
