class ViewModel(val permissionsController: PermissionsController): ViewModel() {
    fun onPhotoPressed() {
        viewModelScope.launch {
            try {
                permissionsController.providePermission(Permission.GALLERY)
                // Permission has been granted successfully.
            } catch(deniedAlways: DeniedAlwaysException) {
                // Permission is always denied.
            } catch(denied: DeniedException) {
                // Permission was denied.
            }
        }
    }
}

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
        
    val viewModel = getViewModel {
        // Pass the platform implementation of the permission controller to a common code.
        ViewModel(PermissionsController())
    }
    
    // Binds the permissions controller to the activity lifecycle.
    viewModel.permissionsController.bind(lifecycle, supportFragmentManager)
}

@Composable
fun TestScreen() {
    val viewModel = getViewModel {
        // Pass the platform implementation of the permission controller to a common code.
        ViewModel(PermissionsController())
    }
    
    // Binds the permissions controller to the LocalLifecycleOwner lifecycle.
    BindEffect(viewModel.permissionsController)
}

@Composable
fun Sample() {
    val factory: PermissionsControllerFactory = rememberPermissionsControllerFactory()
    val controller: PermissionsController = remember(factory) { factory.createPermissionsController() }
    val coroutineScope: CoroutineScope = rememberCoroutineScope()
    
    Button(
        onClick = {
            coroutineScope.launch {
                controller.providePermission(Permission.REMOTE_NOTIFICATION)
            }
        }
    ) {
        Text(text = "give permissions")
    }
}

@Composable
fun Sample() {
    val factory: PermissionsControllerFactory = rememberPermissionsControllerFactory()
    val viewModel: PermissionsViewModel = getViewModel(
        key = "permissions-screen",
        factory = viewModelFactory { PermissionsViewModel(factory.createPermissionsController()) }
    )
    
    BindEffect(viewModel.permissionsController)

    Button(onClick = viewModel::onButtonClick) {
        Text(text = "give permissions")
    }
}

class PermissionsViewModel(
    val permissionsController: PermissionsController
) : ViewModel() {
    fun onButtonClick() {
        viewModelScope.launch {
            permissionsController.providePermission(Permission.REMOTE_NOTIFICATION)
        }
    }
}