Training - Jetpack Compose - fundamentals

sealed class Screen {
    object Navigation : Screen()
    object Text : Screen()
    object TextField : Screen()
    object Buttons : Screen()
    object ProgressIndicator : Screen()
    object AlertDialog : Screen()
}

object Router {

    var currentScreen: MutableState<Screen> = mutableStateOf(Navigation)

    fun navigateTo(destination: Screen) {
        currentScreen.value = destination
    }
}

sealed class Screen {
    object Navigation : Screen()
    object Text : Screen()
    object TextField : Screen()
    object Buttons : Screen()
    object ProgressIndicator : Screen()
    object AlertDialog : Screen()
}

object Router {

    val screens: Array<Pair<Int, Screen>> = arrayOf(
        Pair(R.string.text, Screen.Text),
        Pair(R.string.text_field, Screen.TextField),
        Pair(R.string.buttons, Screen.Buttons),
        Pair(R.string.progress_indicators, Screen.ProgressIndicator),
        Pair(R.string.alert_dialog, Screen.AlertDialog),
    )

    var currentScreen: MutableState<Screen> = mutableStateOf(Navigation)

    fun navigateTo(destination: Screen) {
        currentScreen.value = destination
    }
}

@Composable
fun NavigationScreen() {
    Surface(
        color = White,
        modifier = Modifier.fillMaxSize()
    ) {
        Column(
            verticalArrangement = Center,
            horizontalAlignment = CenterHorizontally
        ) {
            NavigationButton(stringResource(id = text), Text)
            NavigationButton(stringResource(id = text_field), TextField)
            NavigationButton(stringResource(id = buttons), Buttons)
            NavigationButton(stringResource(id = progress_indicators), ProgressIndicator)
            NavigationButton(stringResource(id = alert_dialog), AlertDialog)
        }
    }
}

@Composable
fun NavigationScreen() {
    Surface(
        color = Color.White,
        modifier = Modifier.fillMaxSize()
    ) {
        Column(
            verticalArrangement = Arrangement.Center,
            horizontalAlignment = Alignment.CenterHorizontally
        ) {
            Router.screens.map {
                NavigationButton(
                    stringResource(it.first),
                    it.second
                )
            }
        }
    }
}