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/*
* Copyright (C) 2022 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.ui.model.v31
import android.Manifest
import android.app.LoaderManager
import android.app.role.RoleManager
import android.content.Context
import android.os.Build
import androidx.annotation.RequiresApi
import androidx.lifecycle.ViewModel
import androidx.lifecycle.ViewModelProvider
import com.android.permissioncontroller.permission.model.AppPermissionGroup
import com.android.permissioncontroller.permission.model.legacy.PermissionApps.PermissionApp
import com.android.permissioncontroller.permission.model.v31.AppPermissionUsage
import com.android.permissioncontroller.permission.model.v31.PermissionUsages
import com.android.permissioncontroller.permission.utils.KotlinUtils
import com.android.permissioncontroller.permission.utils.KotlinUtils.getPermGroupLabel
import com.android.permissioncontroller.permission.utils.PermissionMapping
import com.android.permissioncontroller.permission.utils.Utils
import java.time.Instant
import java.util.concurrent.TimeUnit
import kotlin.math.max
/** [ViewModel] for Permission Usage fragments. */
@RequiresApi(Build.VERSION_CODES.S)
class PermissionUsageViewModelLegacy(val roleManager: RoleManager) : ViewModel() {
private val exemptedPackages: Set<String> = Utils.getExemptedPackages(roleManager)
/** Companion object for [PermissionUsageViewModelLegacy]. */
companion object {
/** TODO(ewol): Use the config setting to determine amount of time to show. */
private val TIME_FILTER_MILLIS = TimeUnit.DAYS.toMillis(7)
private val TIME_7_DAYS_DURATION = TimeUnit.DAYS.toMillis(7)
private val TIME_24_HOURS_DURATION = TimeUnit.DAYS.toMillis(1)
/** Permission groups that should be hidden from the permissions usage UI. */
private val EXEMPTED_PERMISSION_GROUPS = setOf(Manifest.permission_group.NOTIFICATIONS)
@JvmStatic
/** Map to represent ordering for permission groups in the permissions usage UI. */
val PERMISSION_GROUP_ORDER: Map<String, Int> =
mapOf(
Manifest.permission_group.LOCATION to 0,
Manifest.permission_group.CAMERA to 1,
Manifest.permission_group.MICROPHONE to 2)
private const val DEFAULT_ORDER = 3
}
/** Loads data from [PermissionUsages] using the [LoaderManager] pattern. */
fun loadPermissionUsages(
loaderManager: LoaderManager,
permissionUsages: PermissionUsages,
callback: PermissionUsages.PermissionsUsagesChangeCallback
) {
val filterTimeBeginMillis =
max(System.currentTimeMillis() - TIME_FILTER_MILLIS, Instant.EPOCH.toEpochMilli())
permissionUsages.load(
null /*filterPackageName*/,
null /*filterPermissionGroups*/,
filterTimeBeginMillis,
Long.MAX_VALUE,
PermissionUsages.USAGE_FLAG_LAST or PermissionUsages.USAGE_FLAG_HISTORICAL,
loaderManager,
false /*getUiInfo*/,
false /*getNonPlatformPermissions*/,
callback /*callback*/,
false /*sync*/)
}
/**
* Parses the provided list of [AppPermissionUsage] instances to build data for the UI to
* display.
*/
fun buildPermissionUsagesUiData(
appPermissionUsages: List<AppPermissionUsage>,
show7Days: Boolean,
showSystem: Boolean,
context: Context,
): PermissionUsagesUiData {
val curTime = System.currentTimeMillis()
val showPermissionUsagesDuration =
if (KotlinUtils.is7DayToggleEnabled() && show7Days) {
TIME_7_DAYS_DURATION
} else {
TIME_24_HOURS_DURATION
}
val startTime = max(curTime - showPermissionUsagesDuration, Instant.EPOCH.toEpochMilli())
val filteredAppPermissionUsages =
appPermissionUsages.filter { !exemptedPackages.contains(it.packageName) }
val displayShowSystemToggle: Boolean =
filteredAppPermissionUsages.displayShowSystemToggle(startTime)
val permissionApps = filteredAppPermissionUsages.getRecentPermissionApps(startTime)
val orderedPermissionGroupsWithUsage =
filteredAppPermissionUsages.buildOrderedPermissionGroupsWithUsageCount(
context, startTime, showSystem)
return PermissionUsagesUiData(
permissionApps, displayShowSystemToggle, orderedPermissionGroupsWithUsage)
}
/**
* Creates an ordered list of [PermissionGroupWithUsageCount] instances to show in the UI,
* representing a mapping of permission groups to the number of apps that recently accessed
* them.
*
* The list is ordered as follows:
* 1. Location
* 2. Camera
* 3. Microphone
* 4. Remaining permission groups, ordered alphabetically
*/
private fun List<AppPermissionUsage>.buildOrderedPermissionGroupsWithUsageCount(
context: Context,
startTime: Long,
showSystem: Boolean
): List<PermissionGroupWithUsageCount> {
val permissionGroupsUsageCountMap: MutableMap<String, Int> = HashMap()
extractPlatformAppPermissionGroupsToDisplay().forEach {
permissionGroupsUsageCountMap[it] = 0
}
for (appUsage in this) {
appUsage.groupUsages
.filter { showSystem || !it.group.isSystem() }
.filter { !EXEMPTED_PERMISSION_GROUPS.contains(it.group.name) }
.filter { it.lastAccessTime >= startTime }
.forEach {
permissionGroupsUsageCountMap[it.group.name] =
permissionGroupsUsageCountMap.getOrDefault(it.group.name, 0) + 1
}
}
return permissionGroupsUsageCountMap.entries
.map { PermissionGroupWithUsageCount(it.key, it.value) }
.sortedWith(
compareBy(
{ PERMISSION_GROUP_ORDER.getOrDefault(it.permGroup, DEFAULT_ORDER) },
{ getPermGroupLabel(context, it.permGroup).toString() }))
}
/** Extracts [PermissionApp] where there has been recent permission usage. */
private fun List<AppPermissionUsage>.getRecentPermissionApps(
startTime: Long,
): java.util.ArrayList<PermissionApp> {
return ArrayList(
filter { appPermissionUsage ->
appPermissionUsage.groupUsages
.filter { !EXEMPTED_PERMISSION_GROUPS.contains(it.group.name) }
.any { it.lastAccessTime >= startTime || it.lastAccessTime == 0L }
}
.map { it.app })
}
/**
* Returns whether there are any user-sensitive app permission groups with recent usage, and
* therefore if the "show/hide system" toggle needs to be displayed in the UI
*/
private fun List<AppPermissionUsage>.displayShowSystemToggle(
startTime: Long,
): Boolean {
return flatMap { it.groupUsages }
.filter { !EXEMPTED_PERMISSION_GROUPS.contains(it.group.name) }
.filter { it.lastAccessTime > startTime && it.lastAccessTime > 0L }
.any { it.group.isSystem() }
}
/**
* Extracts to a set all the permission groups declared by the platform that should be displayed
* in the UI.
*/
private fun List<AppPermissionUsage>.extractPlatformAppPermissionGroupsToDisplay():
Set<String> =
this.flatMap { it.groupUsages }
.map { it.group.name }
.filter { PermissionMapping.isPlatformPermissionGroup(it) }
.filter { !EXEMPTED_PERMISSION_GROUPS.contains(it) }
.toSet()
/**
* Returns whether the [AppPermissionGroup] is considered a system group.
*
* For the purpose of Permissions Hub UI, non user-sensitive [AppPermissionGroup]s are
* considered "system" and should be hidden from the main page unless requested by the user
* through the "show/hide system" toggle.
*/
private fun AppPermissionGroup.isSystem() = !Utils.isGroupOrBgGroupUserSensitive(this)
/** Data class to hold all the information required to configure the UI. */
data class PermissionUsagesUiData(
/** List of [PermissionApp] instances */
// Note that these are used only to cache app data for the permission usage details
// fragment, and have no bearing on the UI on the main permission usage page.
val permissionApps: ArrayList<PermissionApp>,
/** Whether to show the "show/hide system" toggle. */
val displayShowSystemToggle: Boolean,
// TODO(b/243970988): Consider moving ordering logic to fragment.
/** [PermissionGroupWithUsageCount] instances ordered for display in UI */
val orderedPermissionGroupsWithUsageCount: List<PermissionGroupWithUsageCount>,
)
/**
* Data class to associate permission groups with the number of apps that recently accessed
* them.
*/
data class PermissionGroupWithUsageCount(val permGroup: String, val appCount: Int)
}
/** Factory for [PermissionUsageViewModelLegacy]. */
@RequiresApi(Build.VERSION_CODES.S)
class PermissionUsageViewModelFactoryLegacy(private val roleManager: RoleManager) :
ViewModelProvider.Factory {
override fun <T : ViewModel> create(modelClass: Class<T>): T {
@Suppress("UNCHECKED_CAST") return PermissionUsageViewModelLegacy(roleManager) as T
}
}
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