40 lines
1.5 KiB
Kotlin
40 lines
1.5 KiB
Kotlin
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package dev.privacyllc.period.navigation
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import androidx.lifecycle.ViewModel
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import androidx.lifecycle.viewModelScope
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import dagger.hilt.android.lifecycle.HiltViewModel
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import dev.privacyllc.period.core.datastore.UserPreferencesRepository
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import kotlinx.coroutines.flow.MutableStateFlow
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import kotlinx.coroutines.flow.SharingStarted
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import kotlinx.coroutines.flow.StateFlow
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import kotlinx.coroutines.flow.combine
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import kotlinx.coroutines.flow.map
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import kotlinx.coroutines.flow.stateIn
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import javax.inject.Inject
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enum class RootState { Loading, Onboarding, Ready }
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@HiltViewModel
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class RootViewModel @Inject constructor(
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preferences: UserPreferencesRepository,
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) : ViewModel() {
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/**
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* Set when onboarding finishes, so the switch happens immediately rather
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* than waiting for the preference write to travel back through DataStore —
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* which is fast, but not instant, and a visible flicker on the last tap of
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* onboarding is a poor first impression.
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*/
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private val finishedThisSession = MutableStateFlow(false)
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val state: StateFlow<RootState> =
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combine(
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preferences.preferences.map { it.onboardingCompleted },
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finishedThisSession,
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) { completed, finished ->
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if (completed || finished) RootState.Ready else RootState.Onboarding
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}.stateIn(viewModelScope, SharingStarted.WhileSubscribed(5_000), RootState.Loading)
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fun onboardingFinished() { finishedThisSession.value = true }
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}
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