Create UI events

Create a event bus singleton
Handle navigation through events
Handle task creation and edition through events

.idea/caches/deviceStreaming.xml

@@ -232,6 +232,18 @@
           <option name="screenX" value="1080" />
           <option name="screenY" value="2640" />
         </PersistentDeviceSelectionData>
+        <PersistentDeviceSelectionData>
+          <option name="api" value="36" />
+          <option name="brand" value="google" />
+          <option name="codename" value="blazer" />
+          <option name="id" value="blazer" />
+          <option name="labId" value="google" />
+          <option name="manufacturer" value="Google" />
+          <option name="name" value="Pixel 10 Pro" />
+          <option name="screenDensity" value="420" />
+          <option name="screenX" value="1080" />
+          <option name="screenY" value="2410" />
+        </PersistentDeviceSelectionData>
         <PersistentDeviceSelectionData>
           <option name="api" value="32" />
           <option name="brand" value="google" />
@@ -439,6 +451,18 @@
           <option name="screenX" value="720" />
           <option name="screenY" value="1600" />
         </PersistentDeviceSelectionData>
+        <PersistentDeviceSelectionData>
+          <option name="api" value="36" />
+          <option name="brand" value="google" />
+          <option name="codename" value="frankel" />
+          <option name="id" value="frankel" />
+          <option name="labId" value="google" />
+          <option name="manufacturer" value="Google" />
+          <option name="name" value="Pixel 10" />
+          <option name="screenDensity" value="420" />
+          <option name="screenX" value="1080" />
+          <option name="screenY" value="2424" />
+        </PersistentDeviceSelectionData>
         <PersistentDeviceSelectionData>
           <option name="api" value="34" />
           <option name="brand" value="samsung" />
@@ -657,6 +681,18 @@
           <option name="screenX" value="720" />
           <option name="screenY" value="1600" />
         </PersistentDeviceSelectionData>
+        <PersistentDeviceSelectionData>
+          <option name="api" value="36" />
+          <option name="brand" value="google" />
+          <option name="codename" value="mustang" />
+          <option name="id" value="mustang" />
+          <option name="labId" value="google" />
+          <option name="manufacturer" value="Google" />
+          <option name="name" value="Pixel 10 Pro XL" />
+          <option name="screenDensity" value="390" />
+          <option name="screenX" value="1080" />
+          <option name="screenY" value="2404" />
+        </PersistentDeviceSelectionData>
         <PersistentDeviceSelectionData>
           <option name="api" value="34" />
           <option name="brand" value="samsung" />
@@ -755,6 +791,18 @@
           <option name="screenX" value="1080" />
           <option name="screenY" value="2340" />
         </PersistentDeviceSelectionData>
+        <PersistentDeviceSelectionData>
+          <option name="api" value="36" />
+          <option name="brand" value="google" />
+          <option name="codename" value="rango" />
+          <option name="id" value="rango" />
+          <option name="labId" value="google" />
+          <option name="manufacturer" value="Google" />
+          <option name="name" value="Pixel 10 Pro Fold" />
+          <option name="screenDensity" value="390" />
+          <option name="screenX" value="2076" />
+          <option name="screenY" value="2152" />
+        </PersistentDeviceSelectionData>
         <PersistentDeviceSelectionData>
           <option name="api" value="30" />
           <option name="brand" value="google" />

donextv2/src/main/java/com/wismna/geoffroy/donext/presentation/screen/DueTodayTasksScreen.kt

@@ -15,7 +15,6 @@ import androidx.compose.ui.unit.dp
 import androidx.hilt.lifecycle.viewmodel.compose.hiltViewModel
 import com.wismna.geoffroy.donext.domain.model.Task
 import com.wismna.geoffroy.donext.presentation.viewmodel.DueTodayViewModel
-import com.wismna.geoffroy.donext.presentation.viewmodel.TaskItemViewModel
 
 @Composable
 fun DueTodayTasksScreen(
@@ -41,7 +40,7 @@ fun DueTodayTasksScreen(
             items(tasks, key = { it.id!! }) { task ->
                 TaskItemScreen(
                     modifier = Modifier.animateItem(),
-                    viewModel = TaskItemViewModel(task),
+                    task = task,
                     onTaskClick = { onTaskClick(task) },
                     onSwipeLeft = {
                         viewModel.updateTaskDone(task.id!!)

donextv2/src/main/java/com/wismna/geoffroy/donext/presentation/screen/MainScreen.kt

@@ -18,6 +18,7 @@ import androidx.compose.material3.CircularProgressIndicator
 import androidx.compose.material3.DrawerState
 import androidx.compose.material3.DrawerValue
 import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.ExtendedFloatingActionButton
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.LocalContentColor
@@ -31,7 +32,10 @@ import androidx.compose.material3.TopAppBarDefaults
 import androidx.compose.material3.rememberDrawerState
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.CompositionLocalProvider
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.derivedStateOf
 import androidx.compose.runtime.getValue
+import androidx.compose.runtime.remember
 import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
@@ -46,22 +50,20 @@ import androidx.navigation.compose.currentBackStackEntryAsState
 import androidx.navigation.compose.rememberNavController
 import androidx.navigation.navArgument
 import com.wismna.geoffroy.donext.domain.model.AppDestination
+import com.wismna.geoffroy.donext.presentation.ui.events.UiEvent
 import com.wismna.geoffroy.donext.presentation.viewmodel.MainViewModel
 import com.wismna.geoffroy.donext.presentation.viewmodel.TaskListViewModel
-import com.wismna.geoffroy.donext.presentation.viewmodel.TaskViewModel
 import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.flow.collectLatest
 import kotlinx.coroutines.launch
 
 @Composable
 fun MainScreen(
-    modifier: Modifier = Modifier,
     viewModel: MainViewModel = hiltViewModel()
 ) {
     val navController = rememberNavController()
     val drawerState = rememberDrawerState(DrawerValue.Closed)
     val scope = rememberCoroutineScope()
-    // TODO: find a way to get rid of this
-    val taskViewModel: TaskViewModel = hiltViewModel()
 
     if (viewModel.isLoading) {
         Box(Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
@@ -71,7 +73,7 @@ fun MainScreen(
     }
 
     if (viewModel.showTaskSheet) {
-        TaskBottomSheet(taskViewModel) { viewModel.showTaskSheet = false }
+        TaskBottomSheet { viewModel.onDismissTaskSheet() }
     }
     if (viewModel.showAddListSheet) {
         AddListBottomSheet { viewModel.showAddListSheet = false }
@@ -82,21 +84,11 @@ fun MainScreen(
 
     ModalNavigationDrawer(
         drawerContent = {
-            MenuScreen (
+            MenuScreen (currentDestination = viewModel.currentDestination)
-                currentDestination = viewModel.currentDestination,
-                onNavigate = { route ->
-                    scope.launch {
-                        drawerState.close()
-                        navController.navigate(route) {
-                            restoreState = true
-                        }
-                    }
-                }
-            )
         },
         drawerState = drawerState
     ) {
-        AppContent(viewModel = viewModel, taskViewModel = taskViewModel, navController = navController, scope = scope, drawerState = drawerState)
+        AppContent(viewModel = viewModel, navController = navController, scope = scope, drawerState = drawerState)
     }
 }
 
@@ -104,11 +96,22 @@ fun MainScreen(
 fun AppContent(
     modifier : Modifier = Modifier,
     viewModel: MainViewModel,
-    taskViewModel: TaskViewModel,
     navController: NavHostController,
     scope: CoroutineScope,
     drawerState: DrawerState
 ) {
+    LaunchedEffect(Unit) {
+        viewModel.uiEventBus.events.collectLatest { event ->
+            when (event) {
+                is UiEvent.Navigate -> {
+                    drawerState.close()
+                    navController.navigate(event.route)
+                }
+                is UiEvent.NavigateBack -> navController.popBackStack()
+                else -> {}
+            }
+        }
+    }
     Scaffold(
         modifier = modifier.background(MaterialTheme.colorScheme.primaryContainer),
         containerColor = Color.Transparent,
@@ -123,7 +126,7 @@ fun AppContent(
                 navigationIcon = {
                     CompositionLocalProvider(LocalContentColor provides MaterialTheme.colorScheme.onPrimaryContainer) {
                         if (viewModel.currentDestination.showBackButton) {
-                            IconButton(onClick = { navController.popBackStack() }) {
+                            IconButton(onClick = { viewModel.navigateBack() }) {
                                 Icon(Icons.AutoMirrored.Default.ArrowBack, contentDescription = "Back")
                             }
                         } else {
@@ -154,9 +157,10 @@ fun AppContent(
         floatingActionButton = {
             when (val dest = viewModel.currentDestination) {
                 is AppDestination.TaskList -> {
-                    TaskListFab(
+                    ExtendedFloatingActionButton(
-                        taskListId = dest.taskListId,
+                        onClick = { viewModel.onNewTaskButtonClicked(dest.taskListId) },
-                        showBottomSheet = { viewModel.showTaskSheet = it }
+                        icon = { Icon(Icons.Filled.Add, "Create a task.") },
+                        text = { Text("Create a task") },
                     )
                 }
                 else -> null
@@ -192,14 +196,20 @@ fun AppContent(
                         type = NavType.LongType
                     })
                 ) { navBackStackEntry ->
-                    // TODO: when task list has been deleted, we should not navigate to it event if in the stack
+                    val taskListId = navBackStackEntry.arguments?.getLong("taskListId") ?: return@composable
+                    val listExists by remember(taskListId, viewModel.destinations) {
+                        derivedStateOf { viewModel.doesListExist(taskListId) }
+                    }
+                    LaunchedEffect(listExists) {
+                        if (!viewModel.doesListExist(taskListId)) {
+                            viewModel.navigateBack()
+                        }
+                    }
+
                     val taskListViewModel: TaskListViewModel = hiltViewModel(navBackStackEntry)
                     TaskListScreen(
                         viewModel = taskListViewModel,
-                        onTaskClick = { task ->
+                        onTaskClick = { task -> viewModel.onTaskClicked(task) }
-                            taskViewModel.startEditTask(task)
-                            viewModel.showTaskSheet = true
-                        }
                     )
                 }
 
@@ -212,19 +222,13 @@ fun AppContent(
                 composable(AppDestination.DueTodayList.route) {
                     DueTodayTasksScreen (
                         modifier = Modifier,
-                        onTaskClick = { task ->
+                        onTaskClick = { task -> viewModel.onTaskClicked(task) }
-                            taskViewModel.startEditTask(task)
-                            viewModel.showTaskSheet = true
-                        }
                     )
                 }
                 composable(AppDestination.RecycleBin.route) {
                     RecycleBinScreen(
                         modifier = Modifier,
-                        onTaskClick = { task ->
+                        onTaskClick = { task -> viewModel.onTaskClicked(task) }
-                            taskViewModel.startEditTask(task)
-                            viewModel.showTaskSheet = true
-                        }
                     )
                 }
             }

donextv2/src/main/java/com/wismna/geoffroy/donext/presentation/screen/MenuScreen.kt

@@ -31,7 +31,6 @@ import com.wismna.geoffroy.donext.presentation.viewmodel.MenuViewModel
 fun MenuScreen(
     viewModel: MenuViewModel = hiltViewModel(),
     currentDestination: AppDestination,
-    onNavigate: (String) -> Unit
 ) {
     ModalDrawerSheet(
         drawerContainerColor = MaterialTheme.colorScheme.surfaceVariant,
@@ -58,7 +57,7 @@ fun MenuScreen(
                     },
                     icon = { Icon(Icons.Default.Today, contentDescription = "Due Today") },
                     selected = currentDestination is AppDestination.DueTodayList,
-                    onClick = { onNavigate(AppDestination.DueTodayList.route) },
+                    onClick = { viewModel.navigateTo(AppDestination.DueTodayList.route) },
                     modifier = Modifier.padding(NavigationDrawerItemDefaults.ItemPadding)
                 )
                 HorizontalDivider()
@@ -74,7 +73,7 @@ fun MenuScreen(
                         icon = { Icon(Icons.Default.LineWeight, contentDescription = list.name) },
                         selected = currentDestination is AppDestination.TaskList &&
                                 currentDestination.taskListId == list.id,
-                        onClick = { onNavigate("taskList/${list.id}") },
+                        onClick = { viewModel.navigateTo("taskList/${list.id}") },
                         badge = {
                             if (list.overdueCount > 0) {
                                 Badge { Text(list.overdueCount.toString()) }
@@ -91,14 +90,14 @@ fun MenuScreen(
                     label = { Text("Recycle Bin") },
                     icon = { Icon(Icons.Default.Delete, contentDescription = "Recycle Bin") },
                     selected = currentDestination is AppDestination.RecycleBin,
-                    onClick = { onNavigate(AppDestination.RecycleBin.route) },
+                    onClick = { viewModel.navigateTo(AppDestination.RecycleBin.route) },
                     modifier = Modifier.padding(NavigationDrawerItemDefaults.ItemPadding)
                 )
                 NavigationDrawerItem(
                     label = { Text("Edit Lists") },
                     icon = { Icon(Icons.Default.EditNote, contentDescription = "Edit Lists") },
                     selected = currentDestination is AppDestination.ManageLists,
-                    onClick = { onNavigate(AppDestination.ManageLists.route) },
+                    onClick = { viewModel.navigateTo(AppDestination.ManageLists.route) },
                     modifier = Modifier.padding(NavigationDrawerItemDefaults.ItemPadding)
                 )
             }

donextv2/src/main/java/com/wismna/geoffroy/donext/presentation/screen/RecycleBinScreen.kt

@@ -31,7 +31,6 @@ import androidx.compose.ui.unit.dp
 import androidx.hilt.lifecycle.viewmodel.compose.hiltViewModel
 import com.wismna.geoffroy.donext.domain.model.Task
 import com.wismna.geoffroy.donext.presentation.viewmodel.RecycleBinViewModel
-import com.wismna.geoffroy.donext.presentation.viewmodel.TaskItemViewModel
 
 @Composable
 fun RecycleBinScreen(
@@ -77,7 +76,7 @@ fun RecycleBinScreen(
             items(items, key = { it.task.id!! }) { item ->
                 TaskItemScreen(
                     modifier = Modifier.animateItem(),
-                    viewModel = TaskItemViewModel(item.task),
+                    task = item.task,
                     onTaskClick = { onTaskClick(item.task) },
                     onSwipeLeft = {
                         viewModel.restore(item.task.id!!)

donextv2/src/main/java/com/wismna/geoffroy/donext/presentation/screen/TaskItemScreen.kt

@@ -38,16 +38,18 @@ import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import com.wismna.geoffroy.donext.domain.model.Priority
+import com.wismna.geoffroy.donext.domain.model.Task
 import com.wismna.geoffroy.donext.presentation.viewmodel.TaskItemViewModel
 
 @Composable
 fun TaskItemScreen(
     modifier: Modifier = Modifier,
-    viewModel: TaskItemViewModel,
+    task: Task,
     onTaskClick: (taskId: Long) -> Unit,
     onSwipeLeft: () -> Unit,
     onSwipeRight: () -> Unit
 ) {
+    val viewModel = TaskItemViewModel(task)
     // TODO: change this
     val dismissState = rememberSwipeToDismissBoxState(
         confirmValueChange = {

donextv2/src/main/java/com/wismna/geoffroy/donext/presentation/screen/TaskListScreen.kt

@@ -8,12 +8,7 @@ import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
-import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.filled.Add
-import androidx.compose.material3.ExtendedFloatingActionButton
 import androidx.compose.material3.HorizontalDivider
-import androidx.compose.material3.Icon
-import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
@@ -21,13 +16,10 @@ import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.unit.dp
 import androidx.hilt.lifecycle.viewmodel.compose.hiltViewModel
 import com.wismna.geoffroy.donext.domain.model.Task
-import com.wismna.geoffroy.donext.presentation.viewmodel.TaskItemViewModel
 import com.wismna.geoffroy.donext.presentation.viewmodel.TaskListViewModel
-import com.wismna.geoffroy.donext.presentation.viewmodel.TaskViewModel
 
 @Composable
 fun TaskListScreen(
-    modifier: Modifier = Modifier,
     viewModel: TaskListViewModel = hiltViewModel<TaskListViewModel>(),
     onTaskClick: (Task) -> Unit) {
     val tasks = viewModel.tasks
@@ -50,7 +42,7 @@ fun TaskListScreen(
         ) { task ->
             TaskItemScreen(
                 modifier = Modifier.animateItem(),
-                viewModel = TaskItemViewModel(task),
+                task = task,
                 onTaskClick = { onTaskClick(task) },
                 onSwipeLeft = {
                     viewModel.updateTaskDone(task.id!!, true)
@@ -81,7 +73,7 @@ fun TaskListScreen(
         ) { task ->
             TaskItemScreen(
                 modifier = Modifier.animateItem(),
-                viewModel = TaskItemViewModel(task),
+                task = task,
                 onTaskClick = { onTaskClick(task) },
                 onSwipeLeft = {
                     viewModel.updateTaskDone(task.id!!, false)
@@ -96,19 +88,3 @@ fun TaskListScreen(
 
     }
 }
-
-@Composable
-fun TaskListFab(
-    taskListId: Long,
-    viewModel: TaskViewModel = hiltViewModel(),
-    showBottomSheet: (Boolean) -> Unit = {}
-) {
-    ExtendedFloatingActionButton(
-        onClick = {
-            viewModel.startNewTask(taskListId)
-            showBottomSheet(true)
-        },
-        icon = { Icon(Icons.Filled.Add, "Create a task.") },
-        text = { Text("Create a task") },
-    )
-}

donextv2/src/main/java/com/wismna/geoffroy/donext/presentation/screen/TaskScreen.kt

@@ -40,6 +40,7 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.focus.FocusRequester
 import androidx.compose.ui.focus.focusRequester
 import androidx.compose.ui.unit.dp
+import androidx.hilt.lifecycle.viewmodel.compose.hiltViewModel
 import com.wismna.geoffroy.donext.domain.extension.toLocalDate
 import com.wismna.geoffroy.donext.domain.model.Priority
 import com.wismna.geoffroy.donext.presentation.viewmodel.TaskViewModel
@@ -53,7 +54,7 @@ import java.time.format.FormatStyle
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun TaskBottomSheet(
-    viewModel: TaskViewModel,
+    viewModel: TaskViewModel = hiltViewModel(),
     onDismiss: () -> Unit
 ) {
     val titleFocusRequester = remember { FocusRequester() }

donextv2/src/main/java/com/wismna/geoffroy/donext/presentation/ui/events/UiEvent.kt

@@ -0,0 +1,13 @@
+package com.wismna.geoffroy.donext.presentation.ui.events
+
+import com.wismna.geoffroy.donext.domain.model.Task
+
+sealed class UiEvent {
+    data class Navigate(val route: String) : UiEvent()
+    data object NavigateBack : UiEvent()
+    data class ShowSnackbar(val message: String) : UiEvent()
+
+    data class EditTask(val task: Task) : UiEvent()
+    data class CreateNewTask(val taskListId: Long) : UiEvent()
+    data object CloseTask : UiEvent()
+}

donextv2/src/main/java/com/wismna/geoffroy/donext/presentation/viewmodel/MainViewModel.kt

@@ -7,15 +7,20 @@ import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import androidx.navigation.NavBackStackEntry
 import com.wismna.geoffroy.donext.domain.model.AppDestination
+import com.wismna.geoffroy.donext.domain.model.Task
 import com.wismna.geoffroy.donext.domain.usecase.GetTaskListsUseCase
+import com.wismna.geoffroy.donext.presentation.ui.events.UiEvent
+import com.wismna.geoffroy.donext.presentation.ui.events.UiEventBus
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.flow.launchIn
 import kotlinx.coroutines.flow.onEach
+import kotlinx.coroutines.launch
 import javax.inject.Inject
 
 @HiltViewModel
 class MainViewModel @Inject constructor(
-    getTaskListsUseCase: GetTaskListsUseCase
+    getTaskListsUseCase: GetTaskListsUseCase,
+    val uiEventBus: UiEventBus
 ) : ViewModel() {
 
     var isLoading by mutableStateOf(true)
@@ -50,6 +55,33 @@ class MainViewModel @Inject constructor(
             .launchIn(viewModelScope)
     }
 
+    fun navigateBack() {
+        viewModelScope.launch {
+            uiEventBus.send(UiEvent.NavigateBack)
+        }
+    }
+
+    fun onNewTaskButtonClicked(taskLisId: Long) {
+        showTaskSheet = true
+        viewModelScope.launch {
+            uiEventBus.send(UiEvent.CreateNewTask(taskLisId))
+        }
+    }
+
+    fun onTaskClicked(task: Task) {
+        showTaskSheet = true
+        viewModelScope.launch {
+            uiEventBus.send(UiEvent.EditTask(task))
+        }
+    }
+
+    fun onDismissTaskSheet() {
+        showTaskSheet = false
+        viewModelScope.launch {
+            uiEventBus.send(UiEvent.CloseTask)
+        }
+    }
+
     fun setCurrentDestination(navBackStackEntry: NavBackStackEntry?) {
         val route = navBackStackEntry?.destination?.route
         val taskListId = navBackStackEntry?.arguments?.getLong("taskListId")
@@ -61,4 +93,10 @@ class MainViewModel @Inject constructor(
             }
         } ?: startDestination
     }
+
+    fun doesListExist(taskListId: Long): Boolean {
+        return destinations.any { dest ->
+            dest is AppDestination.TaskList && dest.taskListId == taskListId
+        }
+    }
 }

donextv2/src/main/java/com/wismna/geoffroy/donext/presentation/viewmodel/MenuViewModel.kt

@@ -9,17 +9,20 @@ import androidx.lifecycle.viewModelScope
 import com.wismna.geoffroy.donext.domain.model.TaskListWithOverdue
 import com.wismna.geoffroy.donext.domain.usecase.GetDueTodayTasksUseCase
 import com.wismna.geoffroy.donext.domain.usecase.GetTaskListsWithOverdueUseCase
+import com.wismna.geoffroy.donext.presentation.ui.events.UiEvent
+import com.wismna.geoffroy.donext.presentation.ui.events.UiEventBus
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.flow.launchIn
 import kotlinx.coroutines.flow.onEach
+import kotlinx.coroutines.launch
 import javax.inject.Inject
 
 @HiltViewModel
 class MenuViewModel @Inject constructor(
     getTaskListsWithOverdue: GetTaskListsWithOverdueUseCase,
-    getDueTodayTasks: GetDueTodayTasksUseCase
+    getDueTodayTasks: GetDueTodayTasksUseCase,
+    private val uiEventBus: UiEventBus
 ) : ViewModel() {
-
     var taskLists by mutableStateOf<List<TaskListWithOverdue>>(emptyList())
         private set
 
@@ -38,4 +41,10 @@ class MenuViewModel @Inject constructor(
             }
             .launchIn(viewModelScope)
     }
+
+    fun navigateTo(route: String) {
+        viewModelScope.launch {
+            uiEventBus.send(UiEvent.Navigate(route))
+        }
+    }
 }

donextv2/src/main/java/com/wismna/geoffroy/donext/presentation/viewmodel/TaskListViewModel.kt

@@ -19,9 +19,9 @@ import javax.inject.Inject
 @HiltViewModel
 class TaskListViewModel @Inject constructor(
     getTasks: GetTasksForListUseCase,
+    savedStateHandle: SavedStateHandle,
     private val toggleTaskDone: ToggleTaskDoneUseCase,
     private val toggleTaskDeleted: ToggleTaskDeletedUseCase,
-    savedStateHandle: SavedStateHandle
 ) : ViewModel() {
 
     var tasks by mutableStateOf<List<Task>>(emptyList())

donextv2/src/main/java/com/wismna/geoffroy/donext/presentation/viewmodel/TaskViewModel.kt

@@ -9,6 +9,8 @@ import com.wismna.geoffroy.donext.domain.model.Priority
 import com.wismna.geoffroy.donext.domain.model.Task
 import com.wismna.geoffroy.donext.domain.usecase.AddTaskUseCase
 import com.wismna.geoffroy.donext.domain.usecase.UpdateTaskUseCase
+import com.wismna.geoffroy.donext.presentation.ui.events.UiEvent
+import com.wismna.geoffroy.donext.presentation.ui.events.UiEventBus
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.launch
 import java.time.Instant
@@ -19,7 +21,8 @@ import javax.inject.Inject
 @HiltViewModel
 class TaskViewModel @Inject constructor(
     private val createTaskUseCase: AddTaskUseCase,
-    private val updateTaskUseCase: UpdateTaskUseCase
+    private val updateTaskUseCase: UpdateTaskUseCase,
+    private val uiEventBus: UiEventBus
 ) : ViewModel() {
 
     var title by mutableStateOf("")
@@ -38,10 +41,23 @@ class TaskViewModel @Inject constructor(
     private var editingTaskId: Long? = null
     private var taskListId: Long? = null
 
+    init {
+        viewModelScope.launch {
+            uiEventBus.events.collect { event ->
+                when (event) {
+                    is UiEvent.EditTask -> startEditTask(event.task)
+                    is UiEvent.CreateNewTask -> startNewTask(event.taskListId)
+                    is UiEvent.CloseTask -> reset()
+                    else -> {}
+                }
+            }
+        }
+    }
+
     fun screenTitle(): String = if (isDeleted) "Task details" else if (isEditing()) "Edit Task" else "New Task"
     fun isEditing(): Boolean = editingTaskId != null
 
-    fun startNewTask(selectedListId: Long) {
+    private fun startNewTask(selectedListId: Long) {
         editingTaskId = null
         taskListId = selectedListId
         title = ""
@@ -51,7 +67,7 @@ class TaskViewModel @Inject constructor(
         isDeleted = false
     }
 
-    fun startEditTask(task: Task) {
+    private fun startEditTask(task: Task) {
         editingTaskId = task.id
         taskListId = task.taskListId
         title = task.name
@@ -84,8 +100,6 @@ class TaskViewModel @Inject constructor(
             } else {
                 createTaskUseCase(taskListId!!, title, description, priority, dueDate)
             }
-            // reset state after save
-            reset()
             onDone?.invoke()
         }
     }