BackupViewModel.swift

import Combine
import ComposableArchitecture

enum BackupViewState: Equatable {
  case setup
  case config
}

struct BackupViewModel {
  var setupViewModel: () -> BackupSetupViewModel
  var configViewModel: () -> BackupConfigViewModel

  var state: () -> AnyPublisher<BackupViewState, Never>
}

extension BackupViewModel {
  static func live() -> Self {
    class Context {
      @Dependency(\.backupService) var service
    }

    let context = Context()

    return .init(
      setupViewModel: { BackupSetupViewModel.live() },
      configViewModel: { BackupConfigViewModel.live() },
      state: {
        context.service.connectedServicesPublisher
          .map { $0.isEmpty ? BackupViewState.setup : .config }
          .eraseToAnyPublisher()
      }
    )
  }
}