Middleware

Middleware handle interaction across features or services.

Apply filters

.withDelegateMiddleware(using: store.dispatch)
.withDelegateMiddleware(.applySelection(dispatchToPrevious: store.dispatch))

Middleware to delegate (pass back) the new Filter selection to the previous feature. This delegate middleware pattern is used by all selection features.

Handles the following actions:

FilterSelectionStateAction.applySelection: This action dispatches a FilterSelectionAction with state.selected to the dispatch function injected into the builder (usually the previous feature's store.dispatch). The dispatch function acts as a delegate so this means the apply action and data is sent to the previous feature.

Navigation

.withRouterMiddleware(.filterSelectionNavigation(navigator: Container.shared.navigator()))

Middleware to handle navigation actions.

Handles the following NavigationAction destinations:

FilterSelectionNavigationDestination.filterOptionSelection: Builds and presents the SelectionViewController using the SelectionBuilder to present selection of FilterOption items. Uses delegate middleware to map the resulting apply selection into a FilterSelectionStateAction.update action.