RegistrationViewModel.kt

class RegisterViewModel(
        naviComponent: NaviComponent
) : ViewModel by ViewModelImpl(naviComponent) {
    
    val name = ObservableString("")
    val email = ObservableString("")
    val password = ObservableString("")
    var location: LocationModel? = null
    val locationName = ObservableString("")
    
    val isNameValid = ObservableBoolean(false)
    val isEmailValid = ObservableBoolean(false)
    val isPasswordValid = ObservableBoolean(false)
    
    val flags = listOf(
            isNameValid.observe(),
            isEmailValid.observe(),
            isPasswordValid.observe()
    )
    
    val isFormValid = ObservableBoolean(false)
    
    init {
        addListener(Event.ACTIVITY_RESULT) {
            location = it.data()?.getParcelableExtra<LocationModel>(LOCATION_RESULT)
            locationName.set(location?.let { it.city_name ?: it.country_name } ?: "")
        }
        composite += name.observe()
                .map(::validateName)
                .setTo(isNameValid)
                .subscribe()
        composite += email.observe()
                .map(::validateEmail)
                .setTo(isEmailValid)
                .subscribe()
        composite += password.observe()
                .map(::validatePassword)
                .setTo(isPasswordValid)
                .subscribe()
        composite += combineLatest(flags) { it }
                .map { it.all { it == true } }
                .setTo(isFormValid)
                .subscribe()
    }
    
    fun userRegistrationModel() = CreateUserModel(
            email = email.get(),
            password = password.get(),
            name = name.get(),
            location_id = location?.id ?: 0
    )
    
    override fun args(): Map<String, Any> = mapOf(CREATE_USER_MODEL to userRegistrationModel())
}