1 /*
<lambda>null2  * Copyright (C) 2023 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.systemui.mediaprojection.taskswitcher.ui.viewmodel
18 
19 import android.app.ActivityManager.RunningTaskInfo
20 import android.util.Log
21 import androidx.annotation.VisibleForTesting
22 import com.android.systemui.dagger.qualifiers.Background
23 import com.android.systemui.mediaprojection.taskswitcher.domain.interactor.TaskSwitchInteractor
24 import com.android.systemui.mediaprojection.taskswitcher.domain.model.TaskSwitchState
25 import com.android.systemui.mediaprojection.taskswitcher.ui.model.TaskSwitcherNotificationUiState
26 import javax.inject.Inject
27 import kotlin.time.Duration.Companion.seconds
28 import kotlinx.coroutines.CoroutineDispatcher
29 import kotlinx.coroutines.delay
30 import kotlinx.coroutines.flow.Flow
31 import kotlinx.coroutines.flow.map
32 import kotlinx.coroutines.flow.transformLatest
33 import kotlinx.coroutines.withContext
34 
35 class TaskSwitcherNotificationViewModel
36 @Inject
37 constructor(
38     private val interactor: TaskSwitchInteractor,
39     @Background private val backgroundDispatcher: CoroutineDispatcher,
40 ) {
41 
42     val uiState: Flow<TaskSwitcherNotificationUiState> =
43         interactor.taskSwitchChanges
44             .map { taskSwitchChange ->
45                 Log.d(TAG, "taskSwitchChange: $taskSwitchChange")
46                 when (taskSwitchChange) {
47                     is TaskSwitchState.TaskSwitched -> {
48                         TaskSwitcherNotificationUiState.Showing(
49                             projectedTask = taskSwitchChange.projectedTask,
50                             foregroundTask = taskSwitchChange.foregroundTask,
51                         )
52                     }
53                     is TaskSwitchState.NotProjectingTask,
54                     is TaskSwitchState.TaskUnchanged -> {
55                         TaskSwitcherNotificationUiState.NotShowing
56                     }
57                 }
58             }
59             .transformLatest { uiState ->
60                 emit(uiState)
61                 if (uiState is TaskSwitcherNotificationUiState.Showing) {
62                     delay(NOTIFICATION_MAX_SHOW_DURATION)
63                     Log.d(TAG, "Auto hiding notification after $NOTIFICATION_MAX_SHOW_DURATION")
64                     emit(TaskSwitcherNotificationUiState.NotShowing)
65                 }
66             }
67 
68     suspend fun onSwitchTaskClicked(task: RunningTaskInfo) {
69         interactor.switchProjectedTask(task)
70     }
71 
72     suspend fun onGoBackToTaskClicked(task: RunningTaskInfo) =
73         withContext(backgroundDispatcher) { interactor.goBackToTask(task) }
74 
75     companion object {
76         @VisibleForTesting val NOTIFICATION_MAX_SHOW_DURATION = 5.seconds
77         private const val TAG = "TaskSwitchNotifVM"
78     }
79 }
80