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 package com.android.systemui.smartspace.preconditions
17 
18 import com.android.systemui.smartspace.SmartspacePrecondition
19 import com.android.systemui.statusbar.policy.DeviceProvisionedController
20 import com.android.systemui.util.concurrency.Execution
21 import javax.inject.Inject
22 
23 /**
24  * {@link LockscreenPrecondition} covers the conditions that must be met before Smartspace can be
25  * used over lockscreen. These conditions include the device being provisioned with a setup user.
26  */
27 class LockscreenPrecondition @Inject constructor(
28     private val deviceProvisionedController: DeviceProvisionedController,
29     private val execution: Execution
30 ) : SmartspacePrecondition {
31     private var listeners = mutableSetOf<SmartspacePrecondition.Listener>()
32 
33     private val deviceProvisionedListener =
34             object : DeviceProvisionedController.DeviceProvisionedListener {
onDeviceProvisionedChangednull35                 override fun onDeviceProvisionedChanged() {
36                     updateDeviceReadiness()
37                 }
38 
onUserSetupChangednull39                 override fun onUserSetupChanged() {
40                     updateDeviceReadiness()
41                 }
42             }
43 
44     init {
45         deviceProvisionedController.addCallback(deviceProvisionedListener)
46     }
47 
48     var deviceReady: Boolean = false
49         private set
50 
51     init {
52         updateDeviceReadiness()
53     }
54 
updateDeviceReadinessnull55     private fun updateDeviceReadiness() {
56         if (deviceReady) {
57             return
58         }
59 
60         deviceReady = deviceProvisionedController.isDeviceProvisioned &&
61                 deviceProvisionedController.isCurrentUserSetup
62 
63         if (!deviceReady) {
64             return
65         }
66 
67         deviceProvisionedController.removeCallback(deviceProvisionedListener)
68         synchronized(listeners) {
69             listeners.forEach { it.onCriteriaChanged() }
70         }
71     }
72 
addListenernull73     override fun addListener(listener: SmartspacePrecondition.Listener) {
74         synchronized(listeners) {
75             listeners += listener
76         }
77         // Always trigger a targeted callback upon addition of listener.
78         listener.onCriteriaChanged()
79     }
80 
removeListenernull81     override fun removeListener(listener: SmartspacePrecondition.Listener) {
82         synchronized(listeners) {
83             listeners -= listener
84         }
85     }
86 
conditionsMetnull87     override fun conditionsMet(): Boolean {
88         execution.assertIsMainThread()
89         return deviceReady
90     }
91 }
92