1 /*
2  * Copyright (C) 2019 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.permissioncontroller.permission.data
18 
19 import android.annotation.SuppressLint
20 import android.content.BroadcastReceiver
21 import android.content.Context
22 import android.content.Intent
23 import android.content.IntentFilter
24 import android.os.UserHandle
25 import android.os.UserManager
26 
27 import com.android.permissioncontroller.PermissionControllerApplication
28 
29 /**
30  * Live data of the users of the current profile group.
31  *
32  *
33  * Data source: system server
34  */
35 object UsersLiveData : SmartUpdateMediatorLiveData<List<UserHandle>>() {
36 
37     @SuppressLint("StaticFieldLeak")
38     private val app = PermissionControllerApplication.get()
39 
40     /** Monitors changes to the users on this device  */
41     private val mUserMonitor = object : BroadcastReceiver() {
42         override fun onReceive(context: Context, intent: Intent) {
43             onUpdate()
44         }
45     }
46 
47     /**
48      * Update the encapsulated data with the current list of users.
49      */
50     override fun onUpdate() {
51         value = app.getSystemService(UserManager::class.java)!!.userProfiles
52     }
53 
54     override fun onActive() {
55         onUpdate()
56 
57         val userChangeFilter = IntentFilter()
58         userChangeFilter.addAction(Intent.ACTION_USER_ADDED)
59         userChangeFilter.addAction(Intent.ACTION_USER_REMOVED)
60 
61         app.registerReceiver(mUserMonitor, userChangeFilter)
62 
63         super.onActive()
64     }
65 
66     override fun onInactive() {
67         app.unregisterReceiver(mUserMonitor)
68         super.onInactive()
69     }
70 }
71