htc_3.5.swift

extension AppEvent {
    static func reduce(state: AppState, event: AppEvent) -> AppState {
        var state = state
        switch event {
        case .newUserWasLoaded(let user):
            state.user = user
        case .newsEvents(let event):
            if state.newsState == nil {
                state.newsState = NewsState(user: state.user, step: .initial)
            }
            switch event {
            case .dataLoaded(let data):
                state.newsState?.step = .loaded(data: data)
            case .loadData:
                state.newsState?.step = .loading
            }
        }
        return state
    }
}