import IOViewModel
import RxSwift
import RxSwiftExt

class UserViewModel: IOViewModel {

    typealias In = Input
    typealias Out = Output

    private (set) lazy var `in`: In = In(vm: self)
    private (set) lazy var out: Out = Out(vm: self)

    class Input: IOViewModelIn<UserViewModel> {

        lazy var user = BehaviorSubject<User?>(value: nil)
    }

    class Output: IOViewModelOut<UserViewModel> {

        var user: Observable<User> {
            return self.in.user.unwrap()
        }

        var name: Observable<String> {
            return user.map { $0.firstName + " " + $0.lastName }
        }
    }
}

let vm = UserViewModel()

userView.rx.user
    .bind(to: vm.in.user)
    .disposed(by: disposeBag)

vm.out.name
    .bind(to: nameLabel.rx.text)
    .disposed(by: disposeBag)