This commit updates the Redux store so that the new clone API end points
can be used. The composes slice is updated - composes now have a clones
property - and a clones slice is added.
Selectors are added as well. Although not used in this commit, the
selectors will allow us to significantly simplify our React components
that need to retreive data from the store.
We now must work with both `composes` and `clones`. `Composes` and `clones`
have slightly different schema in the Redux store because of differences
in their API responses (the store schema generally mirrors the API
response schema). Selectors are defined for `images` that work for
both `composes` and `clones`.
Using selectors allows our React components to interact with the Redux store
as if it were a database - components can simply query the store by id
using a selector. This hugely simplifies our React components - they no
longer need to accept multiple props related to a `compose` (or `clone`
or `image`). They can simply take a `composeId` (or `cloneId` or
`imageId`) prop and use an appropriate selector to obtain the necessary
information.
Selectors also encapsulate the store schema. Components no longer need to know
about the store schema to get information about an image - they simply
use a selector and in return receive a normalized (and flat) object.
This means that in the future we could easily migrate the API and slices
to RTK Query without the need to modify any of our React components.
This commit modernizes the Redux store to bring it in line with the
current recommended best practices/patterns. It is possible because of a
recent previous commit that added Redux Toolkit as a dependency.
For detailed information on what modern Redux entails, see the Redux docs:
https://redux.js.org/introduction/getting-started#learn-modern-redux-livestream
Practically speaking, this means a huge reduction in boilerplate code.
Maintaining and extending the code will be much easier. All Redux logic
is now encapsulated by 'slices'. Reducers are defined in the slices, and
action creators and action types are generated automatically.
Redux Toolkit includes Immer, which greatly simplifies writing reducer logic
much simpler - state updates in Redux must be immutable, but working
with Javascript objects in an immutable fashion is clumsy, requiring
gratuitious use of the spread ... operator. With Immer, the state can be
updated as if mutable updates were allowed. Reducer logic has been
changed to take advantage of this in this commit.
This commit also removes a large amount of unused code. Fingers crossed
that nothing breaks. The tests do pass, afterall...
One other minor change... composesGet was renamed to fetchComposes and
composeGetStatus was renamed to fetchComposeStatus. This is in line with
the Redux documentation examples.
