1 /*
<lambda>null2  * Copyright (C) 2020 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.app.Application
20 import android.app.usage.UsageStats
21 import android.app.usage.UsageStatsManager
22 import android.app.usage.UsageStatsManager.INTERVAL_MONTHLY
23 import android.os.UserHandle
24 import com.android.permissioncontroller.PermissionControllerApplication
25 import com.android.permissioncontroller.permission.utils.Utils
26 import kotlinx.coroutines.Job
27 
28 /**
29  * A livedata which tracks the usage stats for all packages for all users in a given length of time.
30  *
31  * @param app The current application
32  * @param searchTimeMs The length of time, in milliseconds, that this LiveData will track. The time
33  * will start when the liveData is loaded, and extend backwards searchTimeMs milliseconds.
34  * @param interval The interval to measure in. Default is monthly.
35  */
36 class UsageStatsLiveData private constructor(
37     private val app: Application,
38     private val searchTimeMs: Long,
39     private val interval: Int = INTERVAL_MONTHLY
40 ) : SmartAsyncMediatorLiveData<Map<UserHandle, List<UsageStats>>>() {
41 
42     init {
43         addSource(UsersLiveData) {
44             updateIfActive()
45         }
46     }
47 
48     override suspend fun loadDataAndPostValue(job: Job) {
49         if (!UsersLiveData.isInitialized) {
50             return
51         }
52 
53         val now = System.currentTimeMillis()
54         val userMap = mutableMapOf<UserHandle, List<UsageStats>>()
55         for (user in UsersLiveData.value!!) {
56             // If the user is not enabled, or if the user is a managed profile, and this is not an
57             // android TV (where parental control accounts are managed profiles), do not get stats.
58             if (Utils.isUserDisabledOrWorkProfile(user)) {
59                 continue
60             }
61             val statsManager = Utils.getUserContext(app, user).getSystemService(
62                 UsageStatsManager::class.java)!!
63             statsManager.queryUsageStats(interval, now - searchTimeMs, now)?.let { stats ->
64                 userMap[user] = stats
65             }
66         }
67 
68         postValue(userMap)
69     }
70 
71     override fun onActive() {
72         super.onActive()
73         updateIfActive()
74     }
75 
76     companion object : DataRepository<Pair<Long, Int>, UsageStatsLiveData>() {
77         override fun newValue(key: Pair<Long, Int>): UsageStatsLiveData {
78             return UsageStatsLiveData(PermissionControllerApplication.get(), key.first, key.second)
79         }
80 
81         operator fun get(interval: Long): UsageStatsLiveData {
82             return get(interval to INTERVAL_MONTHLY)
83         }
84     }
85 }