1 /*
2  * Copyright (C) 2023 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.biometrics.domain.interactor
18 
19 import android.hardware.biometrics.SensorLocationInternal
20 import com.android.systemui.biometrics.data.repository.FingerprintPropertyRepository
21 import com.android.systemui.dagger.SysUISingleton
22 import javax.inject.Inject
23 import kotlinx.coroutines.flow.Flow
24 import kotlinx.coroutines.flow.MutableStateFlow
25 import kotlinx.coroutines.flow.asStateFlow
26 import kotlinx.coroutines.flow.combine
27 
28 /** Business logic for SideFps overlay offsets. */
29 interface SideFpsOverlayInteractor {
30 
31     /** The displayId of the current display. */
32     val displayId: Flow<String>
33 
34     /** Overlay offsets corresponding to given displayId. */
35     val overlayOffsets: Flow<SensorLocationInternal>
36 
37     /** Called on display changes, used to keep the display state in sync */
38     fun onDisplayChanged(displayId: String)
39 }
40 
41 @SysUISingleton
42 class SideFpsOverlayInteractorImpl
43 @Inject
44 constructor(fingerprintPropertyRepository: FingerprintPropertyRepository) :
45     SideFpsOverlayInteractor {
46 
47     private val _displayId: MutableStateFlow<String> = MutableStateFlow("")
48     override val displayId: Flow<String> = _displayId.asStateFlow()
49 
50     override val overlayOffsets: Flow<SensorLocationInternal> =
51         combine(displayId, fingerprintPropertyRepository.sensorLocations) { displayId, offsets ->
52             offsets[displayId] ?: SensorLocationInternal.DEFAULT
53         }
54 
55     override fun onDisplayChanged(displayId: String) {
56         _displayId.value = displayId
57     }
58 
59     companion object {
60         private const val TAG = "SideFpsOverlayInteractorImpl"
61     }
62 }
63