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1 /*
2  * 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 android.nearby.multidevices.fastpair.provider.controller
18 
19 import android.bluetooth.le.AdvertiseSettings
20 import android.content.Context
21 import android.nearby.fastpair.provider.FastPairSimulator
22 import android.nearby.fastpair.provider.bluetooth.BluetoothController
23 import com.google.android.mobly.snippet.util.Log
24 import com.google.common.io.BaseEncoding.base64
25 
26 class FastPairProviderSimulatorController(private val context: Context) :
27     FastPairSimulator.AdvertisingChangedCallback, BluetoothController.EventListener {
28     private lateinit var bluetoothController: BluetoothController
29     private lateinit var eventListener: EventListener
30     private var simulator: FastPairSimulator? = null
31 
setupProviderSimulatornull32     fun setupProviderSimulator(listener: EventListener) {
33         eventListener = listener
34 
35         bluetoothController = BluetoothController(context, this)
36         bluetoothController.registerBluetoothStateReceiver()
37         bluetoothController.enableBluetooth()
38         bluetoothController.connectA2DPSinkProfile()
39     }
40 
teardownProviderSimulatornull41     fun teardownProviderSimulator() {
42         simulator?.destroy()
43         bluetoothController.unregisterBluetoothStateReceiver()
44     }
45 
startModelIdAdvertisingnull46     fun startModelIdAdvertising(
47         modelId: String,
48         antiSpoofingKeyString: String,
49         listener: EventListener
50     ) {
51         eventListener = listener
52 
53         val antiSpoofingKey = base64().decode(antiSpoofingKeyString)
54         simulator = FastPairSimulator(
55             context, FastPairSimulator.Options.builder(modelId)
56                 .setAdvertisingModelId(modelId)
57                 .setBluetoothAddress(null)
58                 .setTxPowerLevel(AdvertiseSettings.ADVERTISE_TX_POWER_HIGH)
59                 .setAdvertisingChangedCallback(this)
60                 .setAntiSpoofingPrivateKey(antiSpoofingKey)
61                 .setUseRandomSaltForAccountKeyRotation(false)
62                 .setDataOnlyConnection(false)
63                 .setShowsPasskeyConfirmation(false)
64                 .setRemoveAllDevicesDuringPairing(true)
65                 .build()
66         )
67     }
68 
getProviderSimulatorBleAddressnull69     fun getProviderSimulatorBleAddress() = simulator!!.bleAddress!!
70 
71     fun getLatestReceivedAccountKey() =
72         simulator!!.accountKey?.let { base64().encode(it.toByteArray()) }
73 
74     /**
75      * Called when we change our BLE advertisement.
76      *
77      * @param isAdvertising the advertising status.
78      */
onAdvertisingChangednull79     override fun onAdvertisingChanged(isAdvertising: Boolean) {
80         Log.i("FastPairSimulator onAdvertisingChanged(isAdvertising: $isAdvertising)")
81         eventListener.onAdvertisingChange(isAdvertising)
82     }
83 
84     /** The callback for the first onServiceConnected of A2DP sink profile. */
onA2DPSinkProfileConnectednull85     override fun onA2DPSinkProfileConnected() {
86         eventListener.onA2DPSinkProfileConnected()
87     }
88 
89     /**
90      * Reports the current bond state of the remote device.
91      *
92      * @param bondState the bond state of the remote device.
93      */
onBondStateChangednull94     override fun onBondStateChanged(bondState: Int) {
95     }
96 
97     /**
98      * Reports the current connection state of the remote device.
99      *
100      * @param connectionState the bond state of the remote device.
101      */
onConnectionStateChangednull102     override fun onConnectionStateChanged(connectionState: Int) {
103     }
104 
105     /**
106      * Reports the current scan mode of the local Adapter.
107      *
108      * @param mode the current scan mode of the local Adapter.
109      */
onScanModeChangenull110     override fun onScanModeChange(mode: Int) {
111         eventListener.onScanModeChange(FastPairSimulator.scanModeToString(mode))
112     }
113 
114     /** Interface for listening the events from Fast Pair Provider Simulator. */
115     interface EventListener {
116         /** Reports the first onServiceConnected of A2DP sink profile. */
onA2DPSinkProfileConnectednull117         fun onA2DPSinkProfileConnected()
118 
119         /**
120          * Reports the current scan mode of the local Adapter.
121          *
122          * @param mode the current scan mode in string.
123          */
124         fun onScanModeChange(mode: String)
125 
126         /**
127          * Indicates the advertising state of the Fast Pair provider simulator has changed.
128          *
129          * @param isAdvertising the current advertising state, true if advertising otherwise false.
130          */
131         fun onAdvertisingChange(isAdvertising: Boolean)
132     }
133 }