Return result to back navigation

[JajaComp]

Hi! I try create common input text dialog and return result to called component.
InputDialog:

 InputDialogComponentImpl(
    private val _inputResult = mutableResultFlow<String>()
    val inputResult = _inputResult.asSharedFlow()
    ...
    navResult = { result ->
        navigation.dismiss {
            _inputResult.tryEmit(...)
        }
    },
),

RootComponent:

class RootComponentImpl{
    init {
        coroutineScope().launch {
          repeatOnLifecycle(
              minActiveState = Lifecycle.State.RESUMED,
          ) {
              dialogComponent.inputResult.collect {
                  println(it)
              }
          }
    }
}

But I don’t get the result because when the message arrives, the component is not yet in the resumed state. How i can fix it? Mb replace _inputResult.tryEmit to _inputResult.emit?

[JajaComp]

Now my best solution is:

    private fun <T> MutableSharedFlow<T>.pushResult(value: T) {
        resetResult()
        resultJob = scope.launch {
            [email protected] { it > 0 } // wait first subscriber
            [email protected](value)
        }
    }

    private fun resetResult() {
        resultJob?.cancel()
        resultJob = null
    }

resetResult also called when call childFactory

[arkivanov]

I think you can just pass a callback to your InputDialogComponentImpl class. You can also check the docs.

[JajaComp]

The callback solution will not work in this case because InputDialogComponentImpl can be used by any other component

[arkivanov]

Based on the provided code, it's not clear what the actual case this is. But you can also try to avoid repeatOnLifecycle and just always collect in the scope.

[JajaComp]

This sample of situation when user can input text using dialog in few places of application. If i will avoid repeatOnLifecycle then i will got issue in this situation:
Navigation stack:

• ComponentA
• ComponentB -> collect of inputResultFlow
• ComponentC -> collect of inputResultFlow
  When ComponentC will got response from input, ComponentB also will got same result.
  Can i call onComplete callback of pop/dismiss method after change status of parent component to Resumed lifecycle status?

[arkivanov]

Based on what you described, I would just host the dialog component in every component where required. One of the way is to use Child Slot navigation model in every component where you need the dialog. And still use a callback for delivering results. Would this work for you?