save state

Author: mrtry

app/src/main/java/io/github/mrtry/todolist/app/splash/viewmodel/SplashViewModel.kt

@@ -3,14 +3,15 @@ package io.github.mrtry.todolist.app.splash.viewmodel
 import io.github.mrtry.todolist.app.splash.ui.navigator.SplashNavigator
 import io.github.mrtry.todolist.auth.repository.AccountRepository
 import io.github.mrtry.todolist.di.scope.ActivityScope
+import io.github.mrtry.todolist.misc.ui.viewmodel.ViewModel
 import javax.inject.Inject
 
 @ActivityScope
 class SplashViewModel
 @Inject constructor(
     private val authenticationClient: AccountRepository,
     private val navigator: SplashNavigator
-) {
+) : ViewModel {
     fun ensuredLoggedIn() {
         when (authenticationClient.isLoggedIn()) {
             true -> navigator.navigateToToDo()

app/src/main/java/io/github/mrtry/todolist/app/todo/ui/EditTaskDialogFragment.kt

@@ -71,6 +71,10 @@ class EditTaskDialogFragment : DialogFragment(), Injectable<EditTaskComponent>,
             .plusEditTaskComponent(FragmentModule(this))
         component.inject(this)
 
+        savedInstanceState?.let {
+            viewModel.onRestoreInstanceState(it)
+        }
+
         with(viewBinding) {
             viewModel = this@EditTaskDialogFragment.viewModel
             lifecycleOwner = this@EditTaskDialogFragment
@@ -114,6 +118,11 @@ class EditTaskDialogFragment : DialogFragment(), Injectable<EditTaskComponent>,
         )
     }
 
+    override fun onSaveInstanceState(outState: Bundle) {
+        super.onSaveInstanceState(outState)
+        viewModel.onSaveInstanceState(outState)
+    }
+
     override fun onStop() {
         super.onStop()
         coroutineScope.coroutineContext.cancelChildren()

app/src/main/java/io/github/mrtry/todolist/app/todo/viewmodel/EditTaskViewModel.kt

@@ -1,31 +1,54 @@
 package io.github.mrtry.todolist.app.todo.viewmodel
 
+import android.os.Bundle
 import androidx.lifecycle.MutableLiveData
 import io.github.mrtry.todolist.R
 import io.github.mrtry.todolist.app.todo.ui.EditTaskDialogFragmentValueHolder
 import io.github.mrtry.todolist.app.todo.ui.navigator.EditTaskNavigator
 import io.github.mrtry.todolist.di.scope.FragmentScope
 import io.github.mrtry.todolist.misc.extension.requireValue
+import io.github.mrtry.todolist.misc.ui.viewmodel.ViewModel
 import io.github.mrtry.todolist.task.domainservice.TaskDomainService
 import kotlinx.coroutines.CancellationException
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.launch
 import timber.log.Timber
 import javax.inject.Inject
 
+private const val KEY_TITLE = "KEY_TITLE"
+private const val KEY_DESCRIPTION = "KEY_DESCRIPTION"
+
 @FragmentScope
 class EditTaskViewModel
 @Inject constructor(
     private val domainService: TaskDomainService,
     private val navigator: EditTaskNavigator,
     private val valueHolder: EditTaskDialogFragmentValueHolder,
     private val coroutineScope: CoroutineScope
-) {
+) : ViewModel {
     val title: MutableLiveData<String> = MutableLiveData(valueHolder.task.title)
     val description: MutableLiveData<String> = MutableLiveData(valueHolder.task.description)
 
     val isSaving: MutableLiveData<Boolean> = MutableLiveData(false)
 
+    override fun onSaveInstanceState(outState: Bundle) {
+        with(outState) {
+            putString(KEY_TITLE, title.requireValue())
+            putString(KEY_DESCRIPTION, description.requireValue())
+        }
+    }
+
+    override fun onRestoreInstanceState(savedInstanceState: Bundle) {
+        with(savedInstanceState) {
+            getString(KEY_TITLE).also {
+                title.value = it
+            }
+            getString(KEY_DESCRIPTION).also {
+                description.value = it
+            }
+        }
+    }
+
     fun onSaveClick() {
         val task = valueHolder.task.copy(
             title = title.requireValue(),

app/src/main/java/io/github/mrtry/todolist/app/todo/viewmodel/TaskViewModel.kt

@@ -9,6 +9,7 @@ import io.github.mrtry.todolist.R
 import io.github.mrtry.todolist.app.todo.ui.navigator.ToDoNavigator
 import io.github.mrtry.todolist.di.scope.ActivityScope
 import io.github.mrtry.todolist.misc.extension.requireValue
+import io.github.mrtry.todolist.misc.ui.viewmodel.ViewModel
 import io.github.mrtry.todolist.task.domainservice.TaskDomainService
 import io.github.mrtry.todolist.task.entity.Task
 import kotlinx.coroutines.CancellationException
@@ -23,7 +24,7 @@ class TaskViewModel
     private val navigator: ToDoNavigator,
     private val domainService: TaskDomainService,
     private val coroutineScope: CoroutineScope
-) : TextView.OnEditorActionListener {
+) : ViewModel, TextView.OnEditorActionListener {
     val taskName: MutableLiveData<String> = MutableLiveData("")
     val isSaving: MutableLiveData<Boolean> = MutableLiveData(false)
 

app/src/main/java/io/github/mrtry/todolist/app/todo/viewmodel/ToDoListItemViewModel.kt

@@ -7,6 +7,7 @@ import io.github.mrtry.todolist.R
 import io.github.mrtry.todolist.app.todo.ui.navigator.ToDoNavigator
 import io.github.mrtry.todolist.misc.extension.observeNonNull
 import io.github.mrtry.todolist.misc.extension.requireValue
+import io.github.mrtry.todolist.misc.ui.viewmodel.ViewModel
 import io.github.mrtry.todolist.task.domainservice.TaskDomainService
 import io.github.mrtry.todolist.task.entity.Task
 import kotlinx.coroutines.CancellationException
@@ -20,7 +21,7 @@ class ToDoListItemViewModel(
     private val navigator: ToDoNavigator,
     private val domainService: TaskDomainService,
     private val coroutineScope: CoroutineScope
-) {
+) : ViewModel {
     val task: MutableLiveData<Task> = MutableLiveData(task)
     val isComplete: MutableLiveData<Boolean> = MutableLiveData(task.isComplete)
     val isSaving: MutableLiveData<Boolean> = MutableLiveData(false)

app/src/main/java/io/github/mrtry/todolist/app/todo/viewmodel/ToDoViewModel.kt

@@ -9,6 +9,7 @@ import io.github.mrtry.todolist.app.todo.ui.navigator.ToDoNavigator
 import io.github.mrtry.todolist.app.todo.viewmodel.converter.ToDoListItemViewModelConverter
 import io.github.mrtry.todolist.di.scope.ActivityScope
 import io.github.mrtry.todolist.misc.ui.viewmodel.ToolbarViewModel
+import io.github.mrtry.todolist.misc.ui.viewmodel.ViewModel
 import io.github.mrtry.todolist.task.domainservice.TaskDomainService
 import kotlinx.coroutines.CancellationException
 import kotlinx.coroutines.CoroutineScope
@@ -26,7 +27,7 @@ class ToDoViewModel
     private val taskDomainService: TaskDomainService,
     private val converter: ToDoListItemViewModelConverter,
     private val coroutineScope: CoroutineScope
-) : SwipeRefreshLayout.OnRefreshListener {
+) : ViewModel, SwipeRefreshLayout.OnRefreshListener {
     val isRefreshing: MutableLiveData<Boolean> = MutableLiveData(false)
     val showEmptyStatus: MutableLiveData<Boolean> = MutableLiveData(false)
 

app/src/main/java/io/github/mrtry/todolist/misc/ui/viewmodel/ViewModel.kt

@@ -0,0 +1,8 @@
+package io.github.mrtry.todolist.misc.ui.viewmodel
+
+import android.os.Bundle
+
+interface ViewModel {
+    fun onSaveInstanceState(outState: Bundle) {}
+    fun onRestoreInstanceState(savedInstanceState: Bundle) {}
+}