[FEAT] Add support for Shopify Storefront API Cart Driver

[damienwebdev]

:bulb: Feature request

Feature Name

Shopify Cart Driver

The Desired Behavior

We'd implement the @daffodi/cart driver interface via the storefront API;.

We already have a Shopify product driver, so hopefully this could be fairly easily implemented in Demo.

Your Use Case

As a developer using Shopify, I'd like to be able to manage a customer's cart.

[damienwebdev]

@griest024

[griest024]

The Shopify Storefront API does not have an explicit cart object. Instead, most of the cart fields are contained somewhere within the checkout object so its necessary to obtain the checkout ID. I recommend providing a method to that effect on the checkout service to prevent duplication of logic.

In my implementation I will assume that the checkout ID can be fetched through the checkout service.

[damienwebdev]

@griest024

@lderrickable and I spent some time reviewing this last week. A checkout object in shopify is fundamentally equivalent to a DaffCart. They support very similar functionalities. (Updating billing, updating payment, etc.)

[griest024]

@damienwebdev Do you want me to implement getting the checkout ID (via lastIncompleteCheckout) in the cart driver?

[damienwebdev]

@griest024 I'd imagine that "getCheckoutId" is essentially the same as createCart in cart.

[griest024]

@damienwebdev I think I was misinterpreting the responsibility of the checkout module. In the cart driver I will implement all necessary functionality to ensure that the the shopify checkout object is good to go.