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.AppOpsManager.permissionToOp 20 import android.app.Application 21 import com.android.permissioncontroller.PermissionControllerApplication 22 import com.android.permissioncontroller.permission.utils.Utils.getPlatformPermissionNamesOfGroup 23 import kotlin.collections.set 24 25 /** 26 * LiveData that loads the last usage of permission group for every package/attributionTag-pair. 27 * 28 * <p>This relies on app-ops data, hence this only works for platform defined permission groups. 29 * 30 * <p>For app-ops with duration the end of the access is considered. 31 * 32 * <p>Returns map perm-group-name -> {@link OpUsageLiveData.OpAccess} 33 * 34 * @param app The current application 35 * @param permGroupsNames The names of the permission groups we wish to search for 36 * @param usageDurationMs how much ago can an access have happened to be considered 37 */ 38 class PermGroupUsageLiveData( 39 private val app: Application, 40 private val permGroupsNames: List<String>, 41 private val usageDurationMs: Long 42 ) : SmartUpdateMediatorLiveData<Map<String, List<OpAccess>>>() { 43 /** Perm group name -> OpUsageLiveData */ 44 private val permGroupUsages = permGroupsNames.map { permGroup -> 45 val appops = getPlatformPermissionNamesOfGroup(permGroup).mapNotNull { permName -> 46 permissionToOp(permName) 47 } 48 49 permGroup to OpUsageLiveData[appops, usageDurationMs] 50 }.toMap() 51 52 init { 53 for (usage in permGroupUsages.values) { 54 addSource(usage) { 55 update() 56 } 57 } 58 } 59 60 override fun onUpdate() { 61 if (permGroupUsages.values.any { !it.isInitialized }) { 62 return 63 } 64 65 if (permGroupUsages.values.any { it.value == null }) { 66 value = null 67 return 68 } 69 70 // Only keep the last access for a permission group 71 value = permGroupUsages.map { (permGroupName, usageLiveData) -> 72 // (packageName, attributionTag) -> access 73 val lastAccess = mutableMapOf<Pair<String, String?>, OpAccess>() 74 for (access in usageLiveData.value!!.values.flatten()) { 75 val key = access.packageName to access.attributionTag 76 if (access.isRunning || 77 lastAccess[key]?.lastAccessTime ?: 0 < access.lastAccessTime) { 78 lastAccess[key] = access 79 } 80 } 81 82 permGroupName to lastAccess.values.toList() 83 }.toMap() 84 } 85 86 companion object : DataRepository<Pair<List<String>, Long>, PermGroupUsageLiveData>() { 87 override fun newValue(key: Pair<List<String>, Long>): PermGroupUsageLiveData { 88 return PermGroupUsageLiveData(PermissionControllerApplication.get(), key.first, 89 key.second) 90 } 91 } 92 } 93