apply checking status

Author: mrtry

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

@@ -1,7 +1,55 @@
 package io.github.mrtry.todolist.app.todo.viewmodel
 
+import androidx.lifecycle.LifecycleOwner
+import androidx.lifecycle.MutableLiveData
+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.todo.domainservice.ToDoDomainService
 import io.github.mrtry.todolist.todo.entity.ToDo
+import kotlinx.coroutines.CancellationException
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.launch
+import timber.log.Timber
 
-data class ToDoListItemViewModel(
-    val task: ToDo
-)
+class ToDoListItemViewModel(
+    todo: ToDo,
+    lifecycleOwner: LifecycleOwner,
+    private val navigator: ToDoNavigator,
+    private val domainService: ToDoDomainService,
+    private val coroutineScope: CoroutineScope
+) {
+    val todo: MutableLiveData<ToDo> = MutableLiveData(todo)
+    val isComplete: MutableLiveData<Boolean> = MutableLiveData(todo.isComplete)
+    val isSaving: MutableLiveData<Boolean> = MutableLiveData(false)
+
+    private var currentIsCompleteState: Boolean = isComplete.requireValue()
+
+    init {
+        isComplete.observeNonNull(lifecycleOwner) {
+            this.todo.value = this.todo.requireValue().copy(isComplete = it)
+        }
+
+        this.todo.observeNonNull(lifecycleOwner) {
+            if (it.isComplete == currentIsCompleteState) return@observeNonNull
+
+            coroutineScope.launch {
+                isSaving.value = true
+
+                try {
+                    domainService.save(it)
+                    currentIsCompleteState = isComplete.requireValue()
+                } catch (e: Exception) {
+                    if (e is CancellationException) return@launch
+
+                    Timber.e(e)
+                    navigator.showSnackBar(R.string.to_do_activity_error_update_task_failed)
+                    isComplete.value = currentIsCompleteState
+                } finally {
+                    isSaving.value = false
+                }
+            }
+        }
+    }
+}

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

@@ -1,15 +1,28 @@
 package io.github.mrtry.todolist.app.todo.viewmodel.converter
 
+import androidx.lifecycle.LifecycleOwner
+import io.github.mrtry.todolist.app.todo.ui.navigator.ToDoNavigator
 import io.github.mrtry.todolist.app.todo.viewmodel.ToDoListItemViewModel
 import io.github.mrtry.todolist.di.scope.ActivityScope
+import io.github.mrtry.todolist.todo.domainservice.ToDoDomainService
 import io.github.mrtry.todolist.todo.entity.ToDo
+import kotlinx.coroutines.CoroutineScope
 import javax.inject.Inject
 
 @ActivityScope
 class ToDoListItemViewModelConverter
-@Inject constructor() {
+@Inject constructor(
+    private val lifecycleOwner: LifecycleOwner,
+    private val navigator: ToDoNavigator,
+    private val domainService: ToDoDomainService,
+    private val coroutineScope: CoroutineScope
+) {
     fun convert(entity: ToDo): ToDoListItemViewModel =
         ToDoListItemViewModel(
-            entity
+            entity,
+            lifecycleOwner,
+            navigator,
+            domainService,
+            coroutineScope
         )
 }

app/src/main/java/io/github/mrtry/todolist/misc/extension/LiveDataEx.kt

@@ -0,0 +1,18 @@
+package io.github.mrtry.todolist.misc.extension
+
+import androidx.lifecycle.LifecycleOwner
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.Observer
+
+fun <T> LiveData<T>.observeNonNull(owner: LifecycleOwner, observer: (T) -> Unit) {
+    this.observe(owner, Observer {
+        if (it != null) {
+            observer(it)
+        }
+    })
+}
+
+fun <T> LiveData<T>.requireValue(): T {
+    value ?: throw IllegalStateException("Value has not been set yet.")
+    return value!!
+}

app/src/main/res/layout/list_item_to_do.xml

@@ -4,6 +4,8 @@
 
     <data>
 
+        <import type="android.view.View" />
+
         <variable
             name="viewModel"
             type="io.github.mrtry.todolist.app.todo.viewmodel.ToDoListItemViewModel" />
@@ -20,7 +22,9 @@
             android:layout_marginStart="@dimen/list_item_check_box_margin_start"
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toTopOf="parent"
-            app:layout_constraintBottom_toBottomOf="parent" />
+            app:layout_constraintBottom_toBottomOf="parent"
+            android:enabled="@{!safeUnbox(viewModel.isSaving())}"
+            android:checked="@={viewModel.isComplete}" />
 
         <TextView
             android:id="@+id/title"
@@ -31,7 +35,7 @@
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintTop_toTopOf="parent"
             app:layout_constraintBottom_toBottomOf="parent"
-            android:text="@{viewModel.task.title}"
+            android:text="@{viewModel.todo.title}"
             android:ellipsize="end"
             android:maxLines="1" />
 
@@ -41,5 +45,22 @@
             android:layout_height="@dimen/list_item_divider_height"
             app:layout_constraintBottom_toBottomOf="parent"
             android:background="?android:attr/dividerVertical" />
+
+        <View
+            android:id="@+id/progress_background"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:background="@color/disabled_view_backgroud"
+            android:visibility="@{safeUnbox(viewModel.isSaving()) ? View.VISIBLE :View.GONE}" />
+
+        <ProgressBar
+            android:layout_width="@dimen/banner_add_task_progress_container"
+            android:layout_height="@dimen/banner_add_task_progress_container"
+            app:layout_constraintTop_toTopOf="@id/progress_background"
+            app:layout_constraintBottom_toBottomOf="@id/progress_background"
+            app:layout_constraintStart_toStartOf="@id/progress_background"
+            app:layout_constraintEnd_toEndOf="@id/progress_background"
+            android:visibility="@{safeUnbox(viewModel.isSaving()) ? View.VISIBLE :View.GONE}" />
+
     </androidx.constraintlayout.widget.ConstraintLayout>
 </layout>

app/src/main/res/values/colors.xml

@@ -3,4 +3,6 @@
     <color name="colorPrimary">#6200EE</color>
     <color name="colorPrimaryDark">#3700B3</color>
     <color name="colorAccent">#03DAC5</color>
+
+    <color name="disabled_view_backgroud">#26000000</color>
 </resources>

app/src/main/res/values/strings.xml

@@ -2,5 +2,6 @@
     <string name="app_name">ToDoList</string>
     <string name="to_do_activity_empty_state_text">タスクがまだ登録されていません</string>
     <string name="to_do_activity_error_add_task_failed">登録に失敗しました。再度お試しください。</string>
+    <string name="to_do_activity_error_update_task_failed">更新に失敗しました。再度お試しください。</string>
     <string name="to_do_activity_error_get_task_failed">取得に失敗しました。再度お試しください。</string>
 </resources>