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handling co-routines with viewModel Scope

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Vitor Pamplona
2023-01-19 17:56:22 -05:00
parent fc88c2867d
commit 451137e8fa
1 changed files with 19 additions and 29 deletions
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48
app/src/main/java/com/vitorpamplona/amethyst/ui/screen/FeedViewModel.kt
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@@ -28,6 +28,7 @@ import kotlinx.coroutines.flow.MutableStateFlow
import kotlinx.coroutines.flow.asStateFlow
import kotlinx.coroutines.flow.update
import kotlinx.coroutines.launch
import kotlinx.coroutines.withContext
class NostrChannelFeedViewModel: FeedViewModel(NostrChannelDataSource)
class NostrChatroomListFeedViewModel: FeedViewModel(NostrChatroomListDataSource)
@@ -43,50 +44,39 @@ abstract class FeedViewModel(val dataSource: NostrDataSource<Note>): ViewModel()
val feedContent = _feedContent.asStateFlow()
fun refresh() {
val scope = CoroutineScope(Job() + Dispatchers.IO)
scope.launch {
refreshSuspended()
}
}
viewModelScope.launch(Dispatchers.IO) {
val notes = dataSource.loadTop()
private fun refreshSuspended() {
val notes = dataSource.loadTop()
val oldNotesState = feedContent.value
if (oldNotesState is FeedState.Loaded) {
if (notes != oldNotesState.feed) {
updateFeed(notes)
val oldNotesState = feedContent.value
if (oldNotesState is FeedState.Loaded) {
if (notes != oldNotesState.feed) {
withContext(Dispatchers.Main) {
updateFeed(notes)
}
}
} else {
withContext(Dispatchers.Main) {
updateFeed(notes)
}
}
} else {
updateFeed(notes)
}
}
fun updateFeed(notes: List<Note>) {
val scope = CoroutineScope(Job() + Dispatchers.Main)
scope.launch {
if (notes.isEmpty()) {
_feedContent.update { FeedState.Empty }
} else {
_feedContent.update { FeedState.Loaded(notes) }
}
if (notes.isEmpty()) {
_feedContent.update { FeedState.Empty }
} else {
_feedContent.update { FeedState.Loaded(notes) }
}
}
fun refreshCurrentList() {
val state = feedContent.value
if (state is FeedState.Loaded) {
_feedContent.update { FeedState.Loaded(state.feed) }
}
}
val scope = CoroutineScope(Job() + Dispatchers.IO)
var handlerWaiting = false
@Synchronized
fun invalidateData() {
if (handlerWaiting) return
handlerWaiting = true
val scope = CoroutineScope(Job() + Dispatchers.IO)
scope.launch {
delay(100)
refresh()