I have a LazyColumn that collects a Flow<PagingData<ShoppingListItem>>? from the ViewModel, but the itemCount property of the collected state reports an empty list with 0 items at first briefly before it reports the actual number of items in the database. How can I fix this?
Logcat Output
2022-11-17 06:41:06.187 I/##successItemsCount: 0
2022-11-17 06:41:06.447 I/##successItemsCount: 0
2022-11-17 06:41:06.501 I/##successItemsCount: 11
Sealed Class
sealed class ListItemsState {
object Loading : ListItemsState()
object Error : ListItemsState()
data class Success(val allItems: Flow<PagingData<ShoppingListItem>>?) : ListItemsState()
}
ViewModel
#HiltViewModel
class ShoppingListScreenViewModel #Inject constructor(
private val getAllShoppingListItemsUseCase: GetAllShoppingListItemsUseCase
) {
private val _shoppingListItemsState = mutableStateOf<Flow<PagingData<ShoppingListItem>>?>(null)
private val _listItemsLoadingState = MutableStateFlow<ListItemsState>(ListItemsState.Loading)
val listItemsLoadingState = _listItemsLoadingState.asStateFlow()
init {
getAllShoppingListItemsFromDb()
}
private fun getAllShoppingListItemsFromDb() {
viewModelScope.launch {
_shoppingListItemsState.value = getAllShoppingListItemsUseCase().distinctUntilChanged()
_listItemsLoadingState.value = ListItemsState.Success(_shoppingListItemsState.value)
}
}
}
ShoppingListScreen Composable
#Composable
fun ShoppingListScreen(
navController: NavHostController,
shoppingListScreenViewModel: ShoppingListScreenViewModel,
sharedViewModel: SharedViewModel
) {
val screenHeight = LocalConfiguration.current.screenHeightDp.dp
val allItemsState = shoppingListScreenViewModel.listItemsLoadingState.collectAsState().value
Scaffold(
topBar = {
CustomAppBar(
title = "Shopping List",
titleFontSize = 20.sp,
appBarElevation = 4.dp,
navController = navController
)
},
floatingActionButton = {
FloatingActionButton(
onClick = {
shoppingListScreenViewModel.setStateValue(SHOW_ADD_ITEM_DIALOG_STR, true)
},
backgroundColor = Color.Blue,
contentColor = Color.White
) {
Icon(Icons.Filled.Add, "")
}
},
backgroundColor = Color.White,
// Defaults to false
isFloatingActionButtonDocked = false,
bottomBar = { BottomNavigationBar(navController = navController) }
) {
Box {
when (allItemsState) {
is ListItemsState.Loading -> ConditionalCircularProgressBar(isDisplayed = true)
is ListItemsState.Error -> Text("Error!")
is ListItemsState.Success -> {
ConditionalCircularProgressBar(isDisplayed = false)
val successItems = allItemsState.allItems?.collectAsLazyPagingItems()
Log.i("##successItemsCount", successItems.itemCount.toString())
LazyColumn(
modifier = Modifier
.fillMaxWidth()
.height(screenHeight)
) {
items(
items = successItems!!,
key = { item ->
item.id
}
) { item ->
ShoppingListScreenItem(
navController = navController,
item = item,
sharedViewModel = sharedViewModel
) { isChecked ->
scope.launch {
shoppingListScreenViewModel.changeItemChecked(item!!, isChecked)
}
}
}
item { Spacer(modifier = Modifier.padding(screenHeight - (screenHeight - 70.dp))) }
}
}
else -> {}
}
}
}
}
Related
I am having an issue, where after a Snackbar appears the FAB won't perform navigation for the period of the Snackbar message. If I click it multiple times when the Snackbar is displayed it will stack and open multiple instances of one screen (only after the Snackbar is gone). How do I cancel showing the Snackbar on click of the FAB and preserve the functionality of the FAB at all times?
TasksList.kt:
#OptIn(ExperimentalMaterial3Api::class)
#Composable
fun TasksListScreen(
modifier: Modifier = Modifier,
onNavigate: (UiEvent.Navigate) -> Unit,
viewModel: TaskListViewModel = hiltViewModel()
) {
val tasks = viewModel.tasks.collectAsState(initial = emptyList())
val snackbarHostState = remember { SnackbarHostState() }
LaunchedEffect(key1 = true) {
viewModel.uiEvent.collect { event ->
when (event) {
is UiEvent.ShowSnackbar -> {
val result = snackbarHostState.showSnackbar(
message = event.message,
actionLabel = event.action,
duration = SnackbarDuration.Long,
)
if (result == SnackbarResult.ActionPerformed) {
viewModel.onEvent(TaskListEvent.OnUndoDeleteTask)
}
}
is UiEvent.Navigate -> onNavigate(event)
else -> Unit
}
}
}
Scaffold(
snackbarHost = {
SnackbarHost(snackbarHostState) { data ->
Snackbar(
shape = RoundedShapes.medium,
actionColor = MaterialTheme.colorScheme.primary,
contentColor = MaterialTheme.colorScheme.background,
snackbarData = data
)
}
},
floatingActionButton = {
FloatingActionButton(
shape = RoundedShapes.medium,
onClick = { viewModel.onEvent(TaskListEvent.OnAddTask) },
containerColor = MaterialTheme.colorScheme.primary,
contentColor = MaterialTheme.colorScheme.background
) {
Icon(
imageVector = Icons.Default.Add,
contentDescription = stringResource(R.string.fab_cd)
)
}
},
topBar = {
TopAppBar(
title = { Text(stringResource(R.string.app_name)) },
colors = TopAppBarDefaults.topAppBarColors(
containerColor = MaterialTheme.colorScheme.primary,
titleContentColor = MaterialTheme.colorScheme.background
)
)
},
) { padding ->
LazyColumn(
state = rememberLazyListState(),
verticalArrangement = spacedBy(12.dp),
contentPadding = PaddingValues(vertical = 16.dp),
modifier = modifier
.fillMaxSize()
.padding(padding)
.padding(horizontal = 16.dp),
) {
items(items = tasks.value, key = { task -> task.hashCode() }) { task ->
val currentTask by rememberUpdatedState(newValue = task)
val dismissState = rememberDismissState(confirmValueChange = {
if (it == DismissValue.DismissedToStart) {
viewModel.onEvent(TaskListEvent.OnDeleteTask(currentTask))
}
true
})
SwipeToDismiss(state = dismissState,
directions = setOf(DismissDirection.EndToStart),
background = { },
dismissContent = {
TaskItem(
task = task, modifier = modifier
)
})
}
}
}
}
TaskListViewModel:
#HiltViewModel
class TaskListViewModel #Inject constructor(private val repository: TaskRepositoryImplementation) :
ViewModel() {
val tasks = repository.getTasks()
private val _uiEvent = Channel<UiEvent>()
val uiEvent = _uiEvent.receiveAsFlow()
private var deletedTask: Task? = null
fun onEvent(event: TaskListEvent) {
when (event) {
is TaskListEvent.OnAddTask -> {
sendUiEvent(UiEvent.Navigate(Routes.ADD_EDIT_TASK))
}
is TaskListEvent.OnEditClick -> {
sendUiEvent(UiEvent.Navigate(Routes.ADD_EDIT_TASK + "?taskId=${event.task.id}"))
}
is TaskListEvent.OnDeleteTask -> {
val context = TaskApp.instance?.context
viewModelScope.launch(Dispatchers.IO) {
deletedTask = event.task
repository.deleteTask(event.task)
if (context != null) {
sendUiEvent(
UiEvent.ShowSnackbar(
message = context.getString(R.string.snackbar_deleted),
action = context.getString(R.string.snackbar_action)
)
)
}
}
}
is TaskListEvent.OnUndoDeleteTask -> {
deletedTask?.let { task ->
viewModelScope.launch {
repository.addTask(task)
}
}
}
}
}
private fun sendUiEvent(event: UiEvent) {
viewModelScope.launch(Dispatchers.IO) {
_uiEvent.send(event)
}
}
}
I have created an app using kotlin and android jetpack compose and dependency injection for creating my
retrofit and room datebase the problem is that I'm getting some data using retrofit from internet and showing them in my ui but when I want to send a request for the second time I get the information but
I don't know how to put them insted of existing list that I have .
It's like a movie app that I want to go to next page or load more data when the list ends
interface AppGameApi {
#GET("farsroid")
suspend fun getAppGameFromPage(
#Query("token") token: String = Constants.TOKEN,
#Query("action") action: String,
#Query("page") page: String
): AppGame
#GET("farsroid")
suspend fun getAppGameFromSearch(
#Query("token") token: String = Constants.TOKEN,
#Query("action") action: String = "search",
#Query("q") q: String = ""
): AppGame
#GET("farsroid")
suspend fun getAppGameFromDownload(
#Query("token") token: String = Constants.TOKEN,
#Query("action") action: String = "download",
#Query("link") link: String = ""
): AppGameDownload
}
class AppGameRetrofitRepository #Inject constructor(private val api: AppGameApi) {
private val appGames = DataOrException<AppGame,Boolean,Exception>()
private val appGamesSearch = DataOrException<AppGame,Boolean,Exception>()
private val appGamesDownload = DataOrException<AppGameDownload,Boolean,Exception>()
suspend fun getAllAppGames(page:String,action:String):DataOrException<AppGame,Boolean,java.lang.Exception>{
try {
appGames.isLoading = true
appGames.data = api.getAppGameFromPage(page = page, action = action)
if (appGames.data!!.status == 200) appGames.isLoading = false
Log.d("Mr", "getAllAppGames: ${appGames.data!!.result[0]}")
}catch (exception:Exception){
appGames.e = exception
}
return appGames
}
suspend fun getAllAppGamesSearch(q:String):DataOrException<AppGame,Boolean,java.lang.Exception>{
try {
appGamesSearch.isLoading = true
appGamesSearch.data = api.getAppGameFromSearch(q = q)
if (appGamesSearch.data!!.status == 200) appGamesSearch.isLoading = false
}catch (exception:Exception){
appGamesSearch.e = exception
Log.d("Error", "getAllAppGames: ${appGamesSearch.e!!.localizedMessage} ")
}
return appGamesSearch
}
suspend fun getAllAppGamesDownload(link:String):DataOrException<AppGameDownload,Boolean,java.lang.Exception>{
try {
appGamesDownload.isLoading = true
appGamesDownload.data = api.getAppGameFromDownload(link = link)
if (appGamesDownload.data!!.status == 200) appGamesDownload.isLoading = false
}catch (exception:Exception){
appGamesDownload.e = exception
Log.d("Error", "getAllAppGames: ${appGamesDownload.e!!.localizedMessage} ")
}
return appGamesDownload
}
}
#HiltViewModel
class AppGameRetrofitViewModel #Inject constructor(private val repository: AppGameRetrofitRepository) :
ViewModel() {
var appGame: MutableState<DataOrException<AppGame, Boolean, Exception>> =
mutableStateOf(DataOrException(null, true, Exception("")))
private val appGameSearch: MutableState<DataOrException<AppGame, Boolean, Exception>> =
mutableStateOf(DataOrException(null, true, Exception("")))
private val appGameDownload: MutableState<DataOrException<AppGameDownload, Boolean, Exception>> =
mutableStateOf(DataOrException(null, true, Exception("")))
init {
getAllAppGames("1","app")
}
fun getAllAppGames(
page: String,
action: String
): DataOrException<AppGame, Boolean, Exception> {
viewModelScope.launch {
appGame.value.isLoading = true
appGame.value = repository.getAllAppGames(page = page, action = action)
if (appGame.value.data!!.status == 200) appGame.value.isLoading = false
}
return appGame.value
}
private fun getAllAppGamesSearch(q: String = "") {
viewModelScope.launch {
appGameSearch.value.isLoading = true
appGameSearch.value = repository.getAllAppGamesSearch(q = q)
if (appGameSearch.value.data!!.status == 200) appGameSearch.value.isLoading = false
}
}
private fun getAllAppGamesDownload(link: String = "") {
viewModelScope.launch {
appGameDownload.value.isLoading = true
appGameDownload.value = repository.getAllAppGamesDownload(link = link)
if (appGameDownload.value.data!!.status == 200) appGameDownload.value.isLoading = false
}
}
}
I have tried these and my mainActivity looks like this
#AndroidEntryPoint
class MainActivity : ComponentActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContent {
Android_Complete_TemplateTheme {
val appGameViewModelRoomDatabase by viewModels<RoomDatabaseViewModel>()
val appGameViewModelRetrofit by viewModels<AppGameRetrofitViewModel>()
val navController = rememberNavController()
val pageCounter = remember {
mutableStateOf("1")
}
val pageAction = remember {
mutableStateOf("game")
}
FarsroidNavigationSystem(
roomDatabaseViewModel = appGameViewModelRoomDatabase,
appGameRetrofitViewModel = appGameViewModelRetrofit,
navController = navController,
) {
if (appGameViewModelRetrofit.appGame.value.isLoading == true) {
AppGame(
status = 200,
result = listOf()
)
} else {
appGameViewModelRetrofit.getAllAppGames(
pageCounter.value,
pageAction.value
).data!!
}
}
pageCounter.value= pageCounter.value+1
}
}
}
}
#Composable
fun FarsroidNavigationSystem(
roomDatabaseViewModel: RoomDatabaseViewModel,
appGameRetrofitViewModel: AppGameRetrofitViewModel,
navController: NavHostController,
onClicked: () -> AppGame
) {
NavHost(
navController = navController,
startDestination = Screens.HomeScreen.name
) {
composable(route = Screens.HomeScreen.name) {
HomeScreen(
retrofitViewModel = appGameRetrofitViewModel,
navController = navController
){
onClicked()
}
}
composable(route = Screens.DetailScreen.name) {
DetailScreen(
roomDatabaseViewModel = roomDatabaseViewModel,
navController = navController
)
}
}
}
#Composable
fun HomeScreen(
retrofitViewModel: AppGameRetrofitViewModel,
navController: NavHostController,
onClicked: () -> AppGame
) {
Scaffold(
modifier = Modifier
.fillMaxSize(),
backgroundColor = Color.White,
contentColor = Color.DarkGray
) { paddingValues ->
Spacer(modifier = Modifier.padding(paddingValues))
if (onClicked().status != 200)
CircularProgressIndicator(modifier = Modifier.fillMaxSize(), color = Color.Red)
else
LazyColumn {
items(onClicked().result) {
ItemCard(resultAppGame = it)
}
}
Button(onClick = {
onClicked()
}) {
Text("LoadMore")
}
}
}
#Composable
fun ItemCard(
resultAppGame: ResultAppGame,
) {
Card(
modifier = Modifier
.fillMaxWidth()
.padding(10.dp),
shape = CutCornerShape(10.dp),
backgroundColor = Color.White,
contentColor = Color.DarkGray,
elevation = 10.dp
) {
Column(
modifier = Modifier.padding(10.dp),
verticalArrangement = Arrangement.Top,
horizontalAlignment = Alignment.CenterHorizontally
) {
Card(
modifier = Modifier
.size(150.dp)
.padding(20.dp),
elevation = 10.dp,
shape = CircleShape,
backgroundColor = Color.White,
border = BorderStroke(width = 0.5.dp, Color.LightGray)
) {
Image(
painter = rememberAsyncImagePainter(
model = resultAppGame.pic),
contentDescription = resultAppGame.pic,
contentScale = ContentScale.Fit
)
}
Divider(thickness = 1.dp, color = Color.Gray)
Text(text = resultAppGame.title, textAlign = TextAlign.Right)
Divider(thickness = 1.dp, color = Color.Gray)
Text(text = resultAppGame.description, textAlign = TextAlign.Right)
Divider(thickness = 1.dp, color = Color.Gray)
Text(text = resultAppGame.link)
}
}
}
Depending on the status of PagingData<ShoppingListItem>, I'm updating the loading status in the ViewModel with a sealed class. As I don't know how to check if PagingData<ShoppingListItem> is emtpy in the ViewModel, I'm just collecting the PagingData and calling the .map function on it to add it to a mutableList. I then update the loading state as Emtpy if the list is empty and display an empty message in the UI. The problem is all the code below the collect() method call does not execute, and the circular progress bar does not go away. Even a Log statement below it does not execute. How can I make this work?
Sealed Class
sealed class ListItemsState {
object Loading : ListItemsState()
object Empty : ListItemsState()
object Error : ListItemsState()
data class Success(val allItems: Flow<PagingData<ShoppingListItem>>?) : ListItemsState()
}
ViewModel
#HiltViewModel
class ShoppingListScreenViewModel #Inject constructor(
private val getAllShoppingListItemsUseCase: GetAllShoppingListItemsUseCase
) {
private val _shoppingListItemsState = mutableStateOf<Flow<PagingData<ShoppingListItem>>?>(null)
private val _listItemsLoadingState = MutableStateFlow<ListItemsState>(ListItemsState.Loading)
val listItemsLoadingState = _listItemsLoadingState.asStateFlow()
private val tempList = mutableListOf<ShoppingListItem>()
init {
viewModelScope.launch {
getAllShoppingListItemsFromDb()
}
}
private suspend fun getAllShoppingListItemsFromDb() {
_shoppingListItemsState.value = getAllShoppingListItemsUseCase().distinctUntilChanged()
_shoppingListItemsState.value?.collect {
it.map { shoppingListItem ->
tempList.add(shoppingListItem)
}
} //everything below this line does not execute
Log.i("##sealed", tempList.isEmpty().toString())
when {
tempList.isEmpty() -> _listItemsLoadingState.value = ListItemsState.Empty
else -> _listItemsLoadingState.value =
ListItemsState.Success(_shoppingListItemsState.value)
}
}
}
ShoppingListScreen Composable
#Composable
fun ShoppingListScreen(
navController: NavHostController,
shoppingListScreenViewModel: ShoppingListScreenViewModel,
sharedViewModel: SharedViewModel
) {
val screenHeight = LocalConfiguration.current.screenHeightDp.dp
val allItemsState = shoppingListScreenViewModel.listItemsLoadingState.collectAsState().value
Scaffold(
topBar = {
CustomAppBar(
title = "Shopping List",
titleFontSize = 20.sp,
appBarElevation = 4.dp,
navController = navController
)
},
floatingActionButton = {
FloatingActionButton(
onClick = {
shoppingListScreenViewModel.setStateValue(SHOW_ADD_ITEM_DIALOG_STR, true)
},
backgroundColor = Color.Blue,
contentColor = Color.White
) {
Icon(Icons.Filled.Add, "")
}
},
backgroundColor = Color.White,
// Defaults to false
isFloatingActionButtonDocked = false,
bottomBar = { BottomNavigationBar(navController = navController) }
) {
Box {
when (allItemsState) {
is ListItemsState.Loading -> ConditionalCircularProgressBar(isDisplayed = true)
is ListItemState.Empty -> Text("Empty!")
is ListItemsState.Error -> Text("Error!")
is ListItemsState.Success -> {
ConditionalCircularProgressBar(isDisplayed = false)
val successItems = allItemsState.allItems?.collectAsLazyPagingItems()
LazyColumn(
modifier = Modifier
.fillMaxWidth()
.height(screenHeight)
) {
items(
items = successItems!!,
key = { item ->
item.id
}
) { item ->
ShoppingListScreenItem(
navController = navController,
item = item,
sharedViewModel = sharedViewModel
) { isChecked ->
scope.launch {
shoppingListScreenViewModel.changeItemChecked(item!!, isChecked)
}
}
}
item { Spacer(modifier = Modifier.padding(screenHeight - (screenHeight - 70.dp))) }
}
}
else -> {}
}
}
}
}
I want to show a spinning progress bar while shopping list items are being retrieved from the database in the ViewModel and then hide it when the data has been loaded, but the code below throws the following IllegalStateException. How can I fix it?:
java.lang.IllegalStateException: Reading a state that was created after the snapshot was taken or in a snapshot that has not yet been applied
Composable
#Composable
fun ShoppingListScreen(
navController: NavHostController,
shoppingListScreenViewModel: ShoppingListScreenViewModel,
sharedViewModel: SharedViewModel
) {
val screenHeight = LocalConfiguration.current.screenHeightDp.dp
val allItems = shoppingListScreenViewModel.shoppingListItemsState.value?.collectAsLazyPagingItems()
val showProgressBar = shoppingListScreenViewModel.loading.value
...
Box {
LazyColumn(
modifier = Modifier
.fillMaxWidth()
.height(screenHeight)
) {
if (allItems?.itemCount == 0) {
item { Text("You don't have any items in this shopping list.") }
}
items(
items = allItems!!,
key = { item ->
item.id
}
) { item ->
ShoppingListScreenItem(
navController = navController,
item = item,
sharedViewModel = sharedViewModel
) { isChecked ->
scope.launch {
shoppingListScreenViewModel.changeItemChecked(item!!, isChecked)
}
}
}
item { Spacer(modifier = Modifier.padding(screenHeight - (screenHeight - 70.dp))) }
}
ConditionalCircularProgressBar(isDisplayed = showProgressBar)
}
...
}
ViewModel
#HiltViewModel
class ShoppingListScreenViewModel #Inject constructor(
private val getAllShoppingListItemsUseCase: GetAllShoppingListItemsUseCase
) : ViewModel() {
private val _shoppingListItemsState = mutableStateOf<Flow<PagingData<ShoppingListItem>>?>(null)
val shoppingListItemsState: State<Flow<PagingData<ShoppingListItem>>?> get() = _shoppingListItemsState
val loading = mutableStateOf(false)
init {
loading.value = true
getAllShoppingListItemsFromDb()
}
private fun getAllShoppingListItemsFromDb() {
viewModelScope.launch(Dispatchers.IO){
_shoppingListItemsState.value = getAllShoppingListItemsUseCase().distinctUntilChanged()
withContext(Dispatchers.Main) {
loading.value = false
}
}
}
I have this list I am getting from Firebase and displaying in a LazyColumn but it only works when I navigate to a different fragment and press back. My lazyColumn is being composed inside de ScreenController for the bottomNavigation.
What do I have to do to display it directly?
below is my Fragment
#AndroidEntryPoint
class OpenTicketFragment : Fragment() {
private val viewModel: OpenTicketsViewModel by viewModels()
override fun onCreateView(
inflater: LayoutInflater, container: ViewGroup?,
savedInstanceState: Bundle?
): View {
return ComposeView(requireContext()).apply {
setContent {
val ticketsList = viewModel.tickets.value.data
val currentUserId = viewModel.currentUserId.value
TheProjectTheme {
val navController = rememberNavController()
val title = remember { mutableStateOf("Open Tickets") }
val isDialogOpen = remember { mutableStateOf(false) }
Scaffold(
topBar = {
TopAppBar(
navigationIcon = {
IconButton(onClick = {
isDialogOpen.value = true
}) {
Icon(Icons.Default.ExitToApp, contentDescription = null)
}
},
title = {
Text(text = title.value)
},
actions = {
IconButton(onClick = {
findNavController().navigate(R.id.action_openTicketFragment_to_profileFragment)
}) {
Icon(Icons.Default.Person, contentDescription = null)
}
}
)
},
bottomBar = {
val items = listOf(
Screen.Open,
Screen.Available,
Screen.Closed
)
BottomNavigation {
val navBackStackEntry by navController.currentBackStackEntryAsState()
val currentRoute =
navBackStackEntry?.arguments?.getString(KEY_ROUTE)
items.forEach {
BottomNavigationItem(
icon = { Icon(it.icon, contentDescription = null) },
selected = currentRoute == it.route,
label = { Text(text = it.label) },
onClick = {
navController.popBackStack(
navController.graph.startDestination, false
)
if (currentRoute != it.route) {
navController.navigate(it.route)
}
})
}
}
}
)
{
ScreenController(
navHostController = navController,
title,
ticketsList!!,
findNavController(),
currentUserId
)
AlertDialogComponent(isDialogOpen, findNavController(), viewModel)
}
}
}
}
}
}
#Composable
fun OpenTicketLazyColumn(
ticket: Ticket,
// onClick: () -> Unit,
navController: NavController,
) {
Card(
modifier = Modifier
.padding(8.dp)
.clickable {
val action =
OpenTicketFragmentDirections.actionOpenTicketFragmentToTicketDetailFragment(
ticket.ticketId,
ticket.problem,
ticket.address,
ticket.dateOpened,
ticket.description,
ticket.name,
ticket.status
)
Log.d("SSS8", ticket.ticketId)
navController.navigate(action)
},
elevation = 4.dp
) {
Row(
modifier = Modifier
.padding(8.dp)
.fillMaxWidth()
) {
Column(
modifier = Modifier
.padding(8.dp)
.weight(1f)
) {
Text(
text = "Ticket Opened Date: ${ticket.dateOpened}",
fontSize = 16.sp,
)
Text(
text = "Service required: ${ticket.problem}",
fontSize = 14.sp,
)
}
Column(
modifier = Modifier
.padding(8.dp)
.weight(1f)
) {
Text(
text = "Status: ${ticket.status}",
fontSize = 16.sp,
)
Text(
text = "Address: ${ticket.address}",
fontSize = 16.sp,
)
}
}
}
}
and my composables
#Composable
fun ScreenController(
navHostController: NavHostController,
topBarTitle: MutableState<String>,
ticketList: List<Ticket>,
navController: NavController,
currentUserId: String
) {
NavHost(
navController = navHostController, startDestination = "open"
) {
composable("open") {
Log.d("SACO", currentUserId)
LazyColumn(
modifier = Modifier
.padding(8.dp)
) {
items(items = ticketList) { item ->
val status = remember { mutableStateOf(item.status)}
if (status.value == ASSIGNED && item.assignedToId == currentUserId) {
OpenTickets(
item,
navController
)
}
}
}
topBarTitle.value = "Open Tickets"
}
composable("available") {
LazyColumn(
modifier = Modifier
.padding(8.dp)
) {
items(items = ticketList) { item ->
val status = remember { mutableStateOf(item.status)}
if (status.value == OPEN) {
ClosedTickets(
item,
navController
)
}
}
}
topBarTitle.value = "Available Tickets"
}
composable("closed") {
LazyColumn(
modifier = Modifier
.padding(8.dp)
) {
items(items = ticketList) { item ->
val status = remember { mutableStateOf(item.status)}
if (status.value == CLOSED && item.assignedToId == currentUserId) {
AvailableTickets(
item,
navController
)
}
}
}
topBarTitle.value = "Closed Tickets"
}
}
}
#Composable
fun OpenTickets(
ticket: Ticket,
navController: NavController
) {
OpenTicketLazyColumn(
ticket,
navController
)
}
the viewModel
#HiltViewModel
class OpenTicketsViewModel #Inject constructor(
private val repository: WorkerRepositoryImpl,
private val firesource: FireBaseSource
) : ViewModel() {
val currentUserId = mutableStateOf("")
val tickets: MutableState<DataOrException<List<Ticket>, Exception>> = mutableStateOf(
DataOrException(
listOf(),
Exception("")
)
)
init {
getAllTickets(listOfServices)
}
private fun getAllTickets() {
viewModelScope.launch {
val ticketsList = repository.getAllTickets().data
tickets.value.data = ticketsList
}
}
the firebaseSource
class FireBaseSource #Inject constructor(
private val firebaseAuth: FirebaseAuth,
private val firestore: FirebaseFirestore
) {
suspend fun getAllTickets(
listOfServices: List<String>
): DataOrException<List<Ticket>, Exception> {
val dataOrException = DataOrException<List<Ticket>, Exception>()
try {
dataOrException.data = firestore.collection(TICKETS)
.whereEqualTo(PROBLEM, ELECTRICIAN)
.get()
.await().map { document ->
document.toObject(Ticket::class.java)
}
} catch (e: FirebaseFirestoreException) {
dataOrException.e = e
}
return dataOrException
}
}
1. List item