Make an Observable Lifecycle aware - disposing itself when the lifecycle stops

LifecycleAwareDisposable.kt

/** @author Aidan Follestad (afollestad) */
class LifecycleAwareDisposable(
  private val disposable: Disposable
) : LifecycleObserver {

  @OnLifecycleEvent(ON_DESTROY)
  fun dispose() = disposable.dispose()
}

/** @author Aidan Follestad (afollestad) */
fun LifecycleOwner.ownRx(disposable: Disposable) {
  this.lifecycle.addObserver(LifecycleAwareDisposable(disposable))
}

/** @author Aidan Follestad (afollestad) */
fun Disposable.attachLifecycle(lifecycleOwner: LifecycleOwner) {
  lifecycleOwner.ownRx(this)
}