1 /*
2  * 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.settingslib.bluetooth
18 
19 import kotlinx.coroutines.channels.Channel
20 import kotlinx.coroutines.channels.awaitClose
21 import kotlinx.coroutines.flow.Flow
22 import kotlinx.coroutines.flow.buffer
23 import kotlinx.coroutines.flow.callbackFlow
24 import kotlinx.coroutines.launch
25 
26 /** [Flow] for [LocalBluetoothProfileManager.ServiceListener] service state changes */
27 val LocalBluetoothProfileManager.onServiceStateChanged: Flow<Unit>
28     get() =
<lambda>null29         callbackFlow {
30             val listener =
31                 object : LocalBluetoothProfileManager.ServiceListener {
32                     override fun onServiceConnected() {
33                         launch { trySend(Unit) }
34                     }
35 
36                     override fun onServiceDisconnected() {
37                         launch { trySend(Unit) }
38                     }
39                 }
40             addServiceListener(listener)
41             awaitClose { removeServiceListener(listener) }
42         }
43             .buffer(capacity = Channel.CONFLATED)