* first cut - removing an item from cart:
- add actions to cart store for removing an item and keeping track of
pending removal API call
- add reducer logic for storing pending state on an item, and removing
an item
- expose removeCartItem on new useStoreCartItems hook
- hook it up to remove link / trashcan icon in row item
* disable cart quantity picker/remove link while API request in progress:
- expose cart item pending status from store using selector
- use selector to disable quantity related components in line item row
* fix jsdoc - getCartItem returns undefined if not found
* add typedef for cart items store object provided by hook
* fix rebase error - key prop went awol
* orient useStoreCartItem hook to single cart item:
- simplify interface for client component
- isPending bool (was callback)
- removeItem callback no need to specify item key
+ reinstate disabled prop on remove link when updating (lost in rebase)
* move cart item pending state out of cartItems, preserve API state shape:
- pending is now stored as array of keys
- fix isItemQuantityPending selector (now much simpler)
* ensure react knows that our useSelect depends on cartItemKey
* useStoreCartCoupons hook
* Apply coupon w/ basic error handling for the fetch
* Basic store specifically for cart data
* Working on error states
* Show error on coupon fail
* removeCoupon action
* Added extra endpoints for more efficient cart queries
* Apply/remove coupons working
* Track applying/removing state
* StoreCartCoupon typedef
* Use coupon code on index
* Remove custom controls definition
* Adjust storecartcoupons mapper and remove ref
* Move cartData defaults and remove ref
* Call API directly, avoid schema lookup
* Improved selectors
* StoreCart typedef
* Split up cart state data and add more typedefs
* Add API tests for apply/remove coupon
* Jest tests
* Move default cart data to constant
* Comment indentation
Rua Haszard
Mike Jolley