Use interfaces instead of concrete classes for the item model

[izziaraffaele]

Would be nice to use model classes which implement a BuyableInterface instead of relying on concrete classes and mapped attributes.

interface BuyableInterface {
  function getBuyableId();
  function getBuyableName();
  ....
}

A BuyableRepository which implements a BuyableRepositoryInterface will be used to retrive items from any kind of storage system.

interface BuyableRepositoryInterface {
  function findByBuyableId();
  ....
}

[lukepolo]

Agree 100%. Ill try to get to it this weekend. Also 2.0 is around the corner hoping soon but cant say a timeline for sure.

[izziaraffaele]

I can help if you want, maybe I can do it even today if we can define interfaces' methods.

[lukepolo]

That would be awesome! Im more than happy to accept a PR.