content: /*
   * Copyright (C) 2015 The Android Open Source Project
   *
   * 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.
   */
  
  package <%= appPackage %>.taskdetail;
  
  import android.content.Intent;
  import android.os.Bundle;
  import android.support.annotation.NonNull;
  import android.support.v7.app.ActionBar;
  import android.support.v7.app.AppCompatActivity;
  import android.support.v7.widget.Toolbar;
  
  import <%= appPackage %>.Injection;
  import <%= appPackage %>.R;
  import <%= appPackage %>.ViewModelHolder;
  import <%= appPackage %>.addedittask.AddEditTaskActivity;
  import <%= appPackage %>.addedittask.AddEditTaskFragment;
  import <%= appPackage %>.util.ActivityUtils;
  
  import static <%= appPackage %>.addedittask.AddEditTaskActivity.ADD_EDIT_RESULT_OK;
  import static <%= appPackage %>.taskdetail.TaskDetailFragment.REQUEST_EDIT_TASK;
  
  /**
   * Displays task details screen.
   */
  public class TaskDetailActivity extends AppCompatActivity implements TaskDetailNavigator {
  
      public static final String EXTRA_TASK_ID = "TASK_ID";
  
      public static final String TASKDETAIL_VIEWMODEL_TAG = "TASKDETAIL_VIEWMODEL_TAG";
  
      public static final int DELETE_RESULT_OK = RESULT_FIRST_USER + 2;
  
      public static final int EDIT_RESULT_OK = RESULT_FIRST_USER + 3;
  
      private TaskDetailViewModel mTaskViewModel;
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
  
          setContentView(R.layout.taskdetail_act);
  
          setupToolbar();
  
          TaskDetailFragment taskDetailFragment = findOrCreateViewFragment();
  
          mTaskViewModel = findOrCreateViewModel();
          mTaskViewModel.setNavigator(this);
  
          // Link View and ViewModel
          taskDetailFragment.setViewModel(mTaskViewModel);
      }
  
      @Override
      protected void onDestroy() {
          mTaskViewModel.onActivityDestroyed();
          super.onDestroy();
      }
  
      @NonNull
      private TaskDetailViewModel findOrCreateViewModel() {
          // In a configuration change we might have a ViewModel present. It's retained using the
          // Fragment Manager.
          @SuppressWarnings("unchecked")
          ViewModelHolder<TaskDetailViewModel> retainedViewModel =
                  (ViewModelHolder<TaskDetailViewModel>) getSupportFragmentManager()
                          .findFragmentByTag(TASKDETAIL_VIEWMODEL_TAG);
  
          if (retainedViewModel != null && retainedViewModel.getViewmodel() != null) {
              // If the model was retained, return it.
              return retainedViewModel.getViewmodel();
          } else {
              // There is no ViewModel yet, create it.
              TaskDetailViewModel viewModel = new TaskDetailViewModel(
                      getApplicationContext(),
                      Injection.provideTasksRepository(getApplicationContext()));
  
              // and bind it to this Activity's lifecycle using the Fragment Manager.
              ActivityUtils.addFragmentToActivity(
                      getSupportFragmentManager(),
                      ViewModelHolder.createContainer(viewModel),
                      TASKDETAIL_VIEWMODEL_TAG);
              return viewModel;
          }
      }
  
      @NonNull
      private TaskDetailFragment findOrCreateViewFragment() {
          // Get the requested task id
          String taskId = getIntent().getStringExtra(EXTRA_TASK_ID);
  
          TaskDetailFragment taskDetailFragment = (TaskDetailFragment) getSupportFragmentManager()
                  .findFragmentById(R.id.contentFrame);
  
          if (taskDetailFragment == null) {
              taskDetailFragment = TaskDetailFragment.newInstance(taskId);
  
              ActivityUtils.addFragmentToActivity(getSupportFragmentManager(),
                      taskDetailFragment, R.id.contentFrame);
          }
          return taskDetailFragment;
      }
  
      private void setupToolbar() {
          Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
          setSupportActionBar(toolbar);
          ActionBar ab = getSupportActionBar();
          ab.setDisplayHomeAsUpEnabled(true);
          ab.setDisplayShowHomeEnabled(true);
      }
  
      @Override
      public void onActivityResult(int requestCode, int resultCode, Intent data) {
          if (requestCode == REQUEST_EDIT_TASK) {
              // If the task was edited successfully, go back to the list.
              if (resultCode == ADD_EDIT_RESULT_OK) {
                  // If the result comes from the add/edit screen, it's an edit.
                  setResult(EDIT_RESULT_OK);
                  finish();
              }
          }
      }
  
      @Override
      public boolean onSupportNavigateUp() {
          onBackPressed();
          return true;
      }
  
      @Override
      public void onTaskDeleted() {
          setResult(DELETE_RESULT_OK);
          // If the task was deleted successfully, go back to the list.
          finish();
      }
  
      @Override
      public void onStartEditTask() {
          String taskId = getIntent().getStringExtra(EXTRA_TASK_ID);
          Intent intent = new Intent(this, AddEditTaskActivity.class);
          intent.putExtra(AddEditTaskFragment.ARGUMENT_EDIT_TASK_ID, taskId);
          startActivityForResult(intent, REQUEST_EDIT_TASK);
      }
  }
  