HomeViewController+Reloadable.swift

// MARK: - Reloadable
extension HomeViewController: Reloadable {

  var hasData: Bool {
    return !self.dataFetcher.data.isEmpty
  }

  func reloadData() {
    self.progressView?.hide()
    // Simple factory which choose and init a ProgressView subclass according to a type, here "home"
    self.progressView = ProgressViewFactory.showProgressView(for: .home,
                                                             fromView: self.view,
                                                             insets: self.computedSafeInsets,
                                                             animated: true,
                                                             completion: nil)

    // Just use Rx / promise to simplify the network flow
    self.dataFetcher.fetchBlocks()
      .observeOn(MainScheduler.instance)
      .subscribe(onNext: { [weak self] date in
          self?.progressView?.hide()
      }, onError: { (error) in
        self.progressView?.hide()
        self.showError(error, self)
      })
      .disposed(by: self.disposeBag)
  }
}