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.settings.biometrics.fingerprint2.domain.interactor
18 
19 import android.content.Context
20 import android.database.ContentObserver
21 import android.provider.Settings
22 import android.util.Log
23 import kotlinx.coroutines.CoroutineDispatcher
24 import kotlinx.coroutines.channels.awaitClose
25 import kotlinx.coroutines.flow.Flow
26 import kotlinx.coroutines.flow.callbackFlow
27 import kotlinx.coroutines.flow.flowOn
28 
29 /** Interface that indicates if press to auth is on or off. */
30 interface PressToAuthInteractor {
31   /** Indicates true if the PressToAuth feature is enabled, false otherwise. */
32   val isEnabled: Flow<Boolean>
33 }
34 
35 /** Indicates whether or not the press to auth feature is enabled. */
36 class PressToAuthInteractorImpl(
37   private val context: Context,
38   private val backgroundDispatcher: CoroutineDispatcher,
39 ) : PressToAuthInteractor {
40 
41   /** A flow that contains the status of the press to auth feature. */
42   override val isEnabled: Flow<Boolean> =
<lambda>null43     callbackFlow {
44         val callback =
45           object : ContentObserver(null) {
46             override fun onChange(selfChange: Boolean) {
47               Log.d(TAG, "SFPS_PERFORMANT_AUTH_ENABLED#onchange")
48               trySend(getPressToAuth())
49             }
50           }
51 
52         context.contentResolver.registerContentObserver(
53           Settings.Secure.getUriFor(Settings.Secure.SFPS_PERFORMANT_AUTH_ENABLED),
54           false,
55           callback,
56           context.userId,
57         )
58         trySend(getPressToAuth())
59         awaitClose { context.contentResolver.unregisterContentObserver(callback) }
60       }
61       .flowOn(backgroundDispatcher)
62 
63   /** Returns true if press to auth is enabled */
getPressToAuthnull64   private fun getPressToAuth(): Boolean {
65     var toReturn: Int =
66       Settings.Secure.getIntForUser(
67         context.contentResolver,
68         Settings.Secure.SFPS_PERFORMANT_AUTH_ENABLED,
69         -1,
70         context.userId,
71       )
72     if (toReturn == -1) {
73       toReturn =
74         if (
75           context.resources.getBoolean(com.android.internal.R.bool.config_performantAuthDefault)
76         ) {
77           1
78         } else {
79           0
80         }
81       Settings.Secure.putIntForUser(
82         context.contentResolver,
83         Settings.Secure.SFPS_PERFORMANT_AUTH_ENABLED,
84         toReturn,
85         context.userId,
86       )
87     }
88     return toReturn == 1
89   }
90 
91   companion object {
92     const val TAG = "PressToAuthInteractor"
93   }
94 }
95