Fix crash when no internet connection

Signed-off-by: alperozturk <alper_ozturk@proton.me>

app/src/main/java/com/nextcloud/client/assistant/AssistantViewModel.kt

@@ -36,6 +36,9 @@ import kotlinx.coroutines.launch
 
 class AssistantViewModel(private val repository: AssistantRepositoryType) : ViewModel() {
 
+    private val _errorMessage = MutableStateFlow<String?>(null)
+    val errorMessage: StateFlow<String?> = _errorMessage
+
     private val _selectedTaskType = MutableStateFlow<TaskType?>(null)
     val selectedTaskType: StateFlow<TaskType?> = _selectedTaskType
 
@@ -85,30 +88,43 @@ class AssistantViewModel(private val repository: AssistantRepositoryType) : View
         viewModelScope.launch(Dispatchers.IO) {
             val allTaskType = MainApp.getAppContext().getString(R.string.assistant_screen_all_task_type)
             val result = arrayListOf(TaskType(null, allTaskType, null))
-            val taskTypes = repository.getTaskTypes().resultData.types
+            val taskTypesResult = repository.getTaskTypes()
-            result.addAll(taskTypes)
 
-            _taskTypes.update {
+            if (taskTypesResult.isSuccess) {
-                result.toList()
+                result.addAll(taskTypesResult.resultData.types)
-            }
+                _taskTypes.update {
+                    result.toList()
+                }
 
-            _selectedTaskType.update {
+                _selectedTaskType.update {
-                result.first()
+                    result.first()
+                }
+            } else {
+                _errorMessage.update {
+                    taskTypesResult.message
+                }
             }
         }
     }
 
     fun getTaskList(appId: String = "assistant", onCompleted: () -> Unit = {}) {
         viewModelScope.launch(Dispatchers.IO) {
-            _taskList = repository.getTaskList(appId).resultData.tasks
+            val result = repository.getTaskList(appId)
+            if (result.isSuccess) {
+                _taskList = result.resultData.tasks
 
-            filterTaskList(_selectedTaskType.value?.id)
+                filterTaskList(_selectedTaskType.value?.id)
 
-            _loading.update {
+                _loading.update {
-                false
+                    false
+                }
+
+                onCompleted()
+            } else {
+                _errorMessage.update {
+                    result.message
+                }
             }
-
-            onCompleted()
         }
     }
 
@@ -126,6 +142,12 @@ class AssistantViewModel(private val repository: AssistantRepositoryType) : View
         }
     }
 
+    fun resetErrorState() {
+        _errorMessage.update {
+            null
+        }
+    }
+
     fun resetTaskDeletionState() {
         _isTaskDeleted.update {
             null

app/src/main/java/com/nextcloud/client/assistant/AsssistantScreen.kt

@@ -71,6 +71,7 @@ import kotlinx.coroutines.delay
 @Composable
 fun AssistantScreen(viewModel: AssistantViewModel, activity: Activity) {
     val loading by viewModel.loading.collectAsState()
+    val errorMessage by viewModel.errorMessage.collectAsState()
     val selectedTaskType by viewModel.selectedTaskType.collectAsState()
     val filteredTaskList by viewModel.filteredTaskList.collectAsState()
     val isTaskCreated by viewModel.isTaskCreated.collectAsState()
@@ -133,6 +134,7 @@ fun AssistantScreen(viewModel: AssistantViewModel, activity: Activity) {
         }
     }
 
+    CheckErrorMessage(errorMessage, activity, viewModel)
     CheckTaskAdd(isTaskCreated, activity, viewModel)
     CheckTaskDeletion(isTaskDeleted, activity, viewModel)
 
@@ -182,6 +184,18 @@ private fun CheckTaskAdd(isTaskCreated: Boolean?, activity: Activity, viewModel:
     }
 }
 
+@Composable
+private fun CheckErrorMessage(errorMessage: String?, activity: Activity, viewModel: AssistantViewModel) {
+    errorMessage?.let {
+        DisplayUtils.showSnackMessage(
+            activity,
+            errorMessage
+        )
+
+        viewModel.resetErrorState()
+    }
+}
+
 @Composable
 private fun CheckTaskDeletion(isTaskDeleted: Boolean?, activity: Activity, viewModel: AssistantViewModel) {
     isTaskDeleted?.let {