Mastering MVVM

ReactiveItemsViewModel.swift

import Bond

class ItemsViewModel {
    let items = Observable<[Item]>([])
    let error = Observable<Error?>(nil)
    let refreshing = Observable<Bool>(false)
    
    private let dataManager: DataManager
    init(dataManager: DataManager) {
        self.dataManager = dataManager
    }
    
    func fetch() {
        refreshing.value = false
        dataManager.fetchItems { [weak self] (items, error) in
            self?.items.value = items ?? []
            self?.error.value = error
            self?.refreshing.value = false
        }
    }
}