Convert TaskDetail views to Kotlin

todoapp/app/src/main/java/com/example/android/architecture/blueprints/todoapp/taskdetail/domain/domain.kt

@@ -24,9 +24,6 @@ import com.example.android.architecture.blueprints.todoapp.data.Task
 sealed class TaskDetailEvent {
     companion object {
         @JvmStatic fun deleteTaskRequested() = DeleteTaskRequested
-        @JvmStatic fun completeTaskRequested() = CompleteTaskRequested
-        @JvmStatic fun activateTaskRequested() = ActivateTaskRequested
-        @JvmStatic fun editTaskRequested() = EditTaskRequested
     }
 }
 object DeleteTaskRequested : TaskDetailEvent()

todoapp/app/src/main/java/com/example/android/architecture/blueprints/todoapp/taskdetail/view/package-info.java → todoapp/app/src/main/java/com/example/android/architecture/blueprints/todoapp/taskdetail/view/TaskDetailViewActions.kt

@@ -16,8 +16,15 @@
  * limitations under the License.
  * -/-/-
  */
+package com.example.android.architecture.blueprints.todoapp.taskdetail.view
 
-@ParametersAreNonnullByDefault
-package com.example.android.architecture.blueprints.todoapp.taskdetail.view;
+interface TaskDetailViewActions {
 
-import javax.annotation.ParametersAreNonnullByDefault;
+    fun showTaskMarkedComplete()
+
+    fun showTaskMarkedActive()
+
+    fun showTaskSavingFailed()
+
+    fun showTaskDeletionFailed()
+}

todoapp/app/src/main/java/com/example/android/architecture/blueprints/todoapp/taskdetail/view/TaskDetailViewActions.java → todoapp/app/src/main/java/com/example/android/architecture/blueprints/todoapp/taskdetail/view/TaskDetailViewData.kt

@@ -16,15 +16,8 @@
  * limitations under the License.
  * -/-/-
  */
-package com.example.android.architecture.blueprints.todoapp.taskdetail.view;
+package com.example.android.architecture.blueprints.todoapp.taskdetail.view
 
-public interface TaskDetailViewActions {
+data class TaskDetailViewData(val title: TextViewData, val description: TextViewData, val completedChecked: Boolean)
 
-  void showTaskMarkedComplete();
-
-  void showTaskMarkedActive();
-
-  void showTaskSavingFailed();
-
-  void showTaskDeletionFailed();
-}
+data class TextViewData(val visibility: Int, val text: String)

todoapp/app/src/main/java/com/example/android/architecture/blueprints/todoapp/taskdetail/view/TaskDetailViewDataMapper.kt

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2016, The Android Open Source Project
+ * Copyright (c) 2017-2018 Spotify AB
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+@file:JvmName("TaskDetailViewDataMapper")
+
+package com.example.android.architecture.blueprints.todoapp.taskdetail.view
+
+import android.view.View
+import com.example.android.architecture.blueprints.todoapp.data.Task
+
+fun taskToTaskViewData(task: Task): TaskDetailViewData {
+    val details = task.details
+    val title = details.title
+    val description = details.description
+
+    return TaskDetailViewData(
+            title = TextViewData(if (title.isEmpty()) View.GONE else View.VISIBLE, title),
+            description = TextViewData(if (description.isEmpty()) View.GONE else View.VISIBLE, description),
+            completedChecked = details.completed)
+}