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/*
* Copyright (C) 2020 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.permissioncontroller.permission.data
import android.app.AppOpsManager
import android.app.AppOpsManager.OPSTR_AUTO_REVOKE_PERMISSIONS_IF_UNUSED
import android.app.Application
import android.content.pm.PackageManager.FLAG_PERMISSION_GRANTED_BY_DEFAULT
import android.content.pm.PackageManager.FLAG_PERMISSION_GRANTED_BY_ROLE
import android.os.Handler
import android.os.UserHandle
import android.permission.PermissionControllerManager.HIBERNATION_ELIGIBILITY_ELIGIBLE
import android.permission.PermissionControllerManager.HIBERNATION_ELIGIBILITY_EXEMPT_BY_SYSTEM
import android.permission.PermissionControllerManager.HIBERNATION_ELIGIBILITY_EXEMPT_BY_USER
import android.util.Log
import com.android.permissioncontroller.PermissionControllerApplication
import com.android.permissioncontroller.hibernation.ExemptServicesLiveData
import com.android.permissioncontroller.hibernation.HibernationEnabledLiveData
import com.android.permissioncontroller.hibernation.isPackageHibernationExemptBySystem
import com.android.permissioncontroller.hibernation.isPackageHibernationExemptByUser
import com.android.permissioncontroller.permission.data.PackagePermissionsLiveData.Companion.NON_RUNTIME_NORMAL_PERMS
import com.android.permissioncontroller.permission.model.livedatatypes.HibernationSettingState
import kotlinx.coroutines.Job
/**
* A LiveData which tracks the hibernation/auto-revoke state for one user package.
*
* @param app The current application
* @param packageName The package name whose state we want
* @param user The user for whom we want the package
*/
class HibernationSettingStateLiveData private constructor(
private val app: Application,
private val packageName: String,
private val user: UserHandle
) : SmartAsyncMediatorLiveData<HibernationSettingState>(), AppOpsManager.OnOpChangedListener {
private val packagePermsLiveData =
PackagePermissionsLiveData[packageName, user]
private val packageLiveData = LightPackageInfoLiveData[packageName, user]
private val permStateLiveDatas = mutableMapOf<String, PermStateLiveData>()
private val exemptServicesLiveData = ExemptServicesLiveData[user]
private val appOpsManager = app.getSystemService(AppOpsManager::class.java)!!
// TODO 206455664: remove these once issue is identified
private val LOG_TAG = "HibernationSettingStateLiveData"
private val DELAY_MS = 3000L
private var gotPermLiveDatas: Boolean = false
private var gotPastIsUserExempt: Boolean = false
private var gotPastIsSystemExempt: Boolean = false
init {
addSource(packagePermsLiveData) {
update()
}
addSource(packageLiveData) {
update()
}
addSource(exemptServicesLiveData) {
update()
}
addSource(HibernationEnabledLiveData) {
update()
}
Handler(app.mainLooper).postDelayed({
logState()
}, DELAY_MS)
}
override suspend fun loadDataAndPostValue(job: Job) {
if (!packageLiveData.isInitialized || !packagePermsLiveData.isInitialized ||
!exemptServicesLiveData.isInitialized) {
return
}
val groups = packagePermsLiveData.value?.keys?.filter { it != NON_RUNTIME_NORMAL_PERMS }
val packageInfo = packageLiveData.value
if (packageInfo == null || groups == null) {
postValue(null)
return
}
val getLiveData = { groupName: String -> PermStateLiveData[packageName, groupName, user] }
setSourcesToDifference(groups, permStateLiveDatas, getLiveData)
gotPermLiveDatas = true
if (!permStateLiveDatas.all { it.value.isInitialized }) {
return
}
val exemptBySystem = isPackageHibernationExemptBySystem(packageInfo, user)
val exemptByUser = isPackageHibernationExemptByUser(app, packageInfo)
val eligibility = when {
!exemptBySystem && !exemptByUser -> HIBERNATION_ELIGIBILITY_ELIGIBLE
exemptBySystem -> HIBERNATION_ELIGIBILITY_EXEMPT_BY_SYSTEM
else -> HIBERNATION_ELIGIBILITY_EXEMPT_BY_USER
}
gotPastIsUserExempt = true
val revocableGroups = mutableListOf<String>()
if (!isPackageHibernationExemptBySystem(packageInfo, user)) {
gotPastIsSystemExempt = true
permStateLiveDatas.forEach { (groupName, liveData) ->
val default = liveData.value?.any { (_, permState) ->
permState.permFlags and (FLAG_PERMISSION_GRANTED_BY_DEFAULT or
FLAG_PERMISSION_GRANTED_BY_ROLE) != 0
} ?: false
if (!default) {
revocableGroups.add(groupName)
}
}
}
gotPastIsSystemExempt = true
postValue(HibernationSettingState(eligibility, revocableGroups))
}
override fun onOpChanged(op: String?, packageName: String?) {
if (op == OPSTR_AUTO_REVOKE_PERMISSIONS_IF_UNUSED && packageName == packageName) {
update()
}
}
override fun onActive() {
super.onActive()
appOpsManager.startWatchingMode(OPSTR_AUTO_REVOKE_PERMISSIONS_IF_UNUSED, packageName, this)
}
override fun onInactive() {
super.onInactive()
appOpsManager.stopWatchingMode(this)
}
// TODO 206455664: remove these once issue is identified
private fun logState() {
if (!isStale) {
return
}
Log.i(LOG_TAG, "overall state: isStale:$isStale, isInitialized:$isInitialized, " +
"value:$value, got perm LiveDatas:$gotPermLiveDatas, " +
"got isUserExempt$gotPastIsUserExempt, got isSystemExempt$gotPastIsSystemExempt")
Log.i(LOG_TAG, "packagePermsLivedata isStale:${packagePermsLiveData.isStale}, " +
"isInitialized:${packagePermsLiveData.isInitialized}")
Log.i(LOG_TAG, "ExemptServicesLiveData isStale:${exemptServicesLiveData.isStale}, " +
"isInitialized:${exemptServicesLiveData.isInitialized}")
Log.i(LOG_TAG, "HibernationEnabledLivedata value:${HibernationEnabledLiveData.value}")
for ((group, liveData) in permStateLiveDatas) {
Log.i(LOG_TAG, "permStateLivedata $group isStale:${liveData.isStale}, " +
"isInitialized:${liveData.isInitialized}")
}
}
/**
* Repository for HibernationSettingStateLiveDatas.
* <p> Key value is a pair of string package name and UserHandle, value is its corresponding
* LiveData.
*/
companion object : DataRepositoryForPackage<Pair<String, UserHandle>,
HibernationSettingStateLiveData>() {
override fun newValue(key: Pair<String, UserHandle>): HibernationSettingStateLiveData {
return HibernationSettingStateLiveData(PermissionControllerApplication.get(),
key.first, key.second)
}
}
}
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