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.settings.network.telephony
18 
19 import android.content.Context
20 import android.telephony.TelephonyCallback
21 import android.telephony.TelephonyManager
22 import android.util.Log
23 import kotlinx.coroutines.Dispatchers
24 import kotlinx.coroutines.ExperimentalCoroutinesApi
25 import kotlinx.coroutines.flow.Flow
26 import kotlinx.coroutines.flow.combine
27 import kotlinx.coroutines.flow.conflate
28 import kotlinx.coroutines.flow.flatMapLatest
29 import kotlinx.coroutines.flow.flowOf
30 import kotlinx.coroutines.flow.flowOn
31 import kotlinx.coroutines.flow.onEach
32 
33 @OptIn(ExperimentalCoroutinesApi::class)
34 class CallStateRepository(private val context: Context) {
35     private val subscriptionManager = context.requireSubscriptionManager()
36 
37     /** Flow for call state of given [subId]. */
38     fun callStateFlow(subId: Int): Flow<Int> = context.telephonyCallbackFlow(subId) {
39         object : TelephonyCallback(), TelephonyCallback.CallStateListener {
40             override fun onCallStateChanged(state: Int) {
41                 trySend(state)
42             }
43         }
44     }
45 
46     /**
47      * Flow for in call state.
48      *
49      * @return true if any active subscription's call state is not idle.
50      */
51     fun isInCallFlow(): Flow<Boolean> = context.subscriptionsChangedFlow()
52         .flatMapLatest {
53             val subIds = subscriptionManager.activeSubscriptionIdList
54             if (subIds.isEmpty()) {
55                 flowOf(false)
56             } else {
57                 combine(subIds.map(::callStateFlow)) { states ->
58                     states.any { it != TelephonyManager.CALL_STATE_IDLE }
59                 }
60             }
61         }
62         .conflate()
63         .flowOn(Dispatchers.Default)
64         .onEach { Log.d(TAG, "isInCallFlow: $it") }
65 
66     private companion object {
67         private const val TAG = "CallStateRepository"
68     }
69 }
70