1 /*
<lambda>null2  * Copyright (C) 2022 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.qs.footer.data.repository
18 
19 import com.android.systemui.common.coroutine.ChannelExt.trySendWithFailureLogging
20 import com.android.systemui.common.coroutine.ConflatedCallbackFlow.conflatedCallbackFlow
21 import com.android.systemui.dagger.SysUISingleton
22 import com.android.systemui.qs.FgsManagerController
23 import javax.inject.Inject
24 import kotlinx.coroutines.channels.awaitClose
25 import kotlinx.coroutines.flow.Flow
26 import kotlinx.coroutines.flow.distinctUntilChanged
27 import kotlinx.coroutines.flow.flatMapLatest
28 import kotlinx.coroutines.flow.flowOf
29 import kotlinx.coroutines.flow.map
30 import kotlinx.coroutines.flow.merge
31 
32 interface ForegroundServicesRepository {
33     /**
34      * The number of packages with a service running in the foreground.
35      */
36     val foregroundServicesCount: Flow<Int>
37 
38     /**
39      * Whether there were new changes to the foreground packages since a dialog was last shown.
40      *
41      * Note that this will be equal to `false` if [FgsManagerController.showFooterDot] is false.
42      */
43     val hasNewChanges: Flow<Boolean>
44 }
45 
46 @SysUISingleton
47 class ForegroundServicesRepositoryImpl
48 @Inject
49 constructor(
50     fgsManagerController: FgsManagerController,
51 ) : ForegroundServicesRepository {
52     override val foregroundServicesCount: Flow<Int> =
<lambda>null53             conflatedCallbackFlow<Int> {
54                 fun updateState(numberOfPackages: Int) {
55                     trySendWithFailureLogging(numberOfPackages, TAG)
56                 }
57 
58                 val listener =
59                         object : FgsManagerController.OnNumberOfPackagesChangedListener {
60                             override fun onNumberOfPackagesChanged(numberOfPackages: Int) {
61                                 updateState(numberOfPackages)
62                             }
63                         }
64 
65                 fgsManagerController.addOnNumberOfPackagesChangedListener(listener)
66                 updateState(fgsManagerController.numRunningPackages)
67                 awaitClose {
68                     fgsManagerController.removeOnNumberOfPackagesChangedListener(listener)
69                 }
70             }.distinctUntilChanged()
71 
72     override val hasNewChanges: Flow<Boolean> =
showFooterDotnull73         fgsManagerController.showFooterDot.flatMapLatest { showFooterDot ->
74             if (!showFooterDot) {
75                 return@flatMapLatest flowOf(false)
76             }
77 
78             // A flow that emits whenever the FGS dialog is dismissed.
79             val dialogDismissedEvents = conflatedCallbackFlow {
80                 fun updateState() {
81                     trySendWithFailureLogging(
82                         Unit,
83                         TAG,
84                     )
85                 }
86 
87                 val listener =
88                     object : FgsManagerController.OnDialogDismissedListener {
89                         override fun onDialogDismissed() {
90                             updateState()
91                         }
92                     }
93 
94                 fgsManagerController.addOnDialogDismissedListener(listener)
95                 awaitClose { fgsManagerController.removeOnDialogDismissedListener(listener) }
96             }
97 
98             // Query [fgsManagerController.newChangesSinceDialogWasDismissed] everytime the dialog
99             // is dismissed or when [foregroundServices] is changing.
100             merge(
101                     foregroundServicesCount,
102                     dialogDismissedEvents,
103                 )
104                 .map { fgsManagerController.newChangesSinceDialogWasDismissed }
105                 .distinctUntilChanged()
106         }
107 
108     companion object {
109         private const val TAG = "ForegroundServicesRepositoryImpl"
110     }
111 }
112