LightCloud

ViewModel

final class LoginViewModel {
 
 struct Input {
 let username: Observable<String>
 let password: Observable<String>
 let captchaTap: ControlEvent<Void>
 let loginTap: ControlEvent<Void>
 }
 
 struct Output {
 let isEnabled: Driver<Bool>
 let captcha: Driver<(title: String, isEnabled: Bool)>
 let login: Driver<Bool>
 let state: Driver<UIState>
 }
}
extension LoginViewModel: ViewModelType {
 
 func transform(_ input: LoginViewModel.Input) -> LoginViewModel.Output {
 let isEnabled = input.verifyloginButton()
 
 let state = State()
 let captcha = input.requestLoginCaptcha(state)
 let login = input.requestLogin(state)
 
 return Output(isEnabled: isEnabled,
 captcha: captcha,
 login: login,
 state: state.asDriver(onErrorJustReturn: .idle))
 }
}
fileprivate extension LoginViewModel.Input {
 
 func verifyloginButton() -> Driver<Bool> {
 return Observable
 	.combineLatest(username.isEmpty, password.isEmpty) { !0ドル && !1ドル }
 .asDriver(onErrorJustReturn: false)
 }
 
 func requestLoginCaptcha(_ state: State) -> Driver<(title: String, isEnabled: Bool)> {
 return captchaTap.withLatestFrom(username)
 .flatMap{
 LCUser.rx.requestLoginCaptcha(mobile: 0ドル)
 .trackState(state, success: "验证码已发送")
 .catchErrorJustComplete()
 }
 .flatMap(to: 60.countdown())
 .asDriver(onErrorJustReturn: (title: "重新发送", isEnabled: true))
 }
 
 func requestLogin(_ state: State) -> Driver<Bool> {
 let usernameAndPassword = Observable
 .combineLatest(username, password) { (username: 0ドル, password: 1ドル) }
 return loginTap.withLatestFrom(usernameAndPassword)
 .flatMap {
 LCUser.rx.login(mobile: 0ドル.username, captcha: 0ドル.password)
 .trackState(state, success: "登录成功")
 .catchErrorJustComplete()
 }
 .map(to: true)
 .asDriver(onErrorJustReturn: false)
 }
}