gistfile1.txt

// Набор эвентов в файле Events.kt
interface Event

class OpenLinkEvent(val link: String) : Event

class ShowSnackbarEvent(val message: String) : Event

class ShareEvent(val link: String) : Event

class OpenEmailAppEvent(val email: String) : Event

// CommandsLiveData.kt
class CommandsLiveData<T> : MutableLiveData<ConcurrentLinkedQueue<T>>() {

    fun onNext(value: T) {
        var commands = getValue()
        if (commands == null) {
            commands = ConcurrentLinkedQueue<T>()
        }
        commands.add(value)
        setValue(commands)
    }
}

// BaseViewModel.kt
abstract class BaseViewModel : ViewModel() {

    val events = CommandsLiveData<Event>()

    private val compositeDisposable by lazy { CompositeDisposable() }

    override fun onCleared() {
        LeakDetectorUtils.watch(this)

        clearSubscriptions()
        super.onCleared()
    }

    fun clearSubscriptions() = compositeDisposable.clear()

    protected fun Disposable.autoDispose(): Disposable {
        compositeDisposable.add(this)
        return this
    }
}

// LyfecycleExt.kt
inline fun <reified T : Any, reified L : CommandsLiveData<T>> Fragment.observe(liveData: L, noinline block: (T) -> Unit) {
    liveData.observe(viewLifecycleOwner, Observer<ConcurrentLinkedQueue<T>> { commands ->
        if (commands == null) {
            return@Observer
        }
        var command: T?
        do {
            command = commands.poll()
            if (command != null) {
                block.invoke(command)
            }
        } while (command != null)
    })
}

// Подписка на евенты
observe(viewModel.events, ::handleEvent)

private fun handleEvent(event: Event) {
        when (event) {
            is OpenLinkEvent -> AndroidDeviceUtils.openLinkInBrowser(requireContext(), event.link)
        }
}