Restore on Device

Fetch Books

TBD: Описание зачем делать fetch

To fetch user books, you need to call:

let booksRepository = BooksRepository()
booksRepository.getBooks { (result) in
    switch result {
    case .success(let books):
        // display a list of books and provide books for selection
    case .failure(_):
        // your implementation
    }
}

Begin Restore

TBD: Нужно детальней описать пример

To restore contacts, you need to call: books - list of user books from which contacts should be restored.

CloudikeContacts.shared.restoreProcessor.restore(from: books) { (success, error) in }

Monitoring

To monitor the restore status, you need to call:

CloudikeContacts.shared.restoreProcessor.registerObserver(observer)

To cancel monitoring, you need to call:

CloudikeContacts.shared.restoreProcessor.unregisterObserver(observer)

TBD: Описание прогресса рестора, стрктура нотификаций и значение

The following example shows how to do that:

class RestoreProgressViewController: UIViewController {
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        CloudikeContacts.shared.restoreProcessor.registerObserver(self)
    }

    override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        CloudikeContacts.shared.restoreProcessor.unregisterObserver(self)
    }
}

extension RestoreProgressViewController: RestoreObserver {
    func restoreStateChanged(state: RestoreProcessor.RestoreState) {
        // your implementation
    }    
}