1 /*
<lambda>null2  * Copyright (C) 2024 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.statusbar.notification.stack.ui.viewbinder
18 
19 import com.android.systemui.common.coroutine.ConflatedCallbackFlow
20 import com.android.systemui.statusbar.notification.stack.NotificationStackScrollLayout
21 import com.android.systemui.statusbar.notification.stack.ui.view.NotificationStatsLogger
22 import com.android.systemui.statusbar.notification.stack.ui.viewmodel.NotificationLoggerViewModel
23 import com.android.systemui.util.kotlin.Utils
24 import com.android.systemui.util.kotlin.sample
25 import com.android.systemui.util.kotlin.throttle
26 import kotlinx.coroutines.channels.awaitClose
27 import kotlinx.coroutines.flow.collectLatest
28 import kotlinx.coroutines.flow.combine
29 
30 /**
31  * Binds a [NotificationStatsLogger] to its [NotificationLoggerViewModel], and wires in
32  * [NotificationStackScrollLayout.OnNotificationLocationsChangedListener] updates to it.
33  */
34 object NotificationStatsLoggerBinder {
35 
36     /** minimum delay in ms between Notification location updates */
37     private const val NOTIFICATION_UPDATE_PERIOD_MS = 500L
38 
39     suspend fun bindLogger(
40         view: NotificationStackScrollLayout,
41         logger: NotificationStatsLogger,
42         viewModel: NotificationLoggerViewModel,
43     ) {
44         // Updates the logger about whether the Notification panel, and the individual Notifications
45         // are visible to the user.
46         viewModel.isLockscreenOrShadeInteractive
47             .sample(
48                 combine(viewModel.isOnLockScreen, viewModel.activeNotifications, ::Pair),
49                 Utils.Companion::toTriple
50             )
51             .collectLatest { (isPanelInteractive, isOnLockScreen, notifications) ->
52                 if (isPanelInteractive) {
53                     logger.onLockscreenOrShadeInteractive(
54                         isOnLockScreen = isOnLockScreen,
55                         activeNotifications = notifications,
56                     )
57                     view.onNotificationLocationsUpdated
58                         // Delay the updates with [NOTIFICATION_UPDATE_PERIOD_MS]. If the original
59                         // flow emits more than once during this period, only the latest value is
60                         // emitted, meaning that we won't log the intermediate Notification states.
61                         .throttle(NOTIFICATION_UPDATE_PERIOD_MS)
62                         .sample(viewModel.activeNotificationRanks, ::Pair)
63                         .collect { (locationsProvider, ranks) ->
64                             logger.onNotificationLocationsChanged(locationsProvider, ranks)
65                         }
66                 } else {
67                     logger.onLockscreenOrShadeNotInteractive(
68                         activeNotifications = notifications,
69                     )
70                 }
71             }
72     }
73 }
74 
75 private val NotificationStackScrollLayout.onNotificationLocationsUpdated
76     get() =
<lambda>null77         ConflatedCallbackFlow.conflatedCallbackFlow {
78             val callback =
79                 NotificationStackScrollLayout.OnNotificationLocationsChangedListener { callable ->
80                     trySend(callable)
81                 }
82             setNotificationLocationsChangedListener(callback)
83             awaitClose { setNotificationLocationsChangedListener(null) }
84         }
85