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/*
* Copyright (C) 2021 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
import android.app.Application
import androidx.lifecycle.AndroidViewModel
import androidx.lifecycle.LiveData
import androidx.lifecycle.MediatorLiveData
import com.android.permissioncontroller.permission.data.PermGroupsPackagesUiInfoLiveData
import com.android.permissioncontroller.permission.data.StandardPermGroupNamesLiveData
import com.android.permissioncontroller.permission.model.livedatatypes.PermGroupPackagesUiInfo
/**
* A [androidx.lifecycle.ViewModel] for [ManagePermissionsFragment] and
* [ManagePermissionsOtherFragment]. However, [ManagePermissionsViewModel] is designed in a way so
* that its owner should be an [Activity][androidx.fragment.app.FragmentActivity] rather than
* individual [Fragments][androidx.fragment.app.Fragment], and the aforementioned Fragments that
* manage different sets of the permission groups should to share a single instance of
* [ManagePermissionsViewModel].
*/
class ManagePermissionsViewModel(app: Application) : AndroidViewModel(app) {
/** [LiveData] that contains a list of all platform-defined permission groups. */
val standardPermGroupsLiveData: LiveData<List<PermGroupPackagesUiInfo>> =
MediatorLiveData<List<PermGroupPackagesUiInfo>>().apply {
addSource(PermGroupsPackagesUiInfoLiveData(app, StandardPermGroupNamesLiveData)) {
permGroups ->
value = permGroups.values.filterNotNull()
}
}
/**
* [LiveData] that contains a list of platform-defined permission groups, such that at least one
* the permissions in the group has been requested at runtime by at least one non-system
* application or has been pregranted to a non-system application.
*
* @see com.android.permissioncontroller.permission.ui.television.ManagePermissionsFragment
*/
val usedPermissionGroups: LiveData<List<PermGroupPackagesUiInfo>> =
MediatorLiveData<List<PermGroupPackagesUiInfo>>().apply {
addSource(standardPermGroupsLiveData) { permGroups ->
value = permGroups.filter { it.nonSystemUserSetOrPreGranted > 0 }
}
}
/**
* [LiveData] that contains a list of platform-defined permission groups, such that all of the
* permissions in the group neither has been requested at runtime by any of the non-system
* applications nor has been pregranted to any such application. But at least one of the
* permissions in the group is requested by or pregranted to at least one system application,
* other than the Shell (we do not show permission groups that are granted only to the Shell,
* because it has all the permissions granted).
*
* @see com.android.permissioncontroller.permission.ui.television.ManagePermissionsOtherFragment
*/
val unusedPermissionGroups: LiveData<List<PermGroupPackagesUiInfo>> =
MediatorLiveData<List<PermGroupPackagesUiInfo>>().apply {
addSource(standardPermGroupsLiveData) { permGroups ->
value =
permGroups
.filter { it.nonSystemUserSetOrPreGranted == 0 }
.filter { it.systemUserSetOrPreGranted > 0 }
.filterNot { it.onlyShellPackageGranted }
}
}
/**
* [LiveData] that contains a list of the application-defined permission groups (a.k.a. "custom"
* permissions), such that at least one of the permissions in the group has been requested at
* runtime by or has been pregranted to at least one application (system or non-system).
*
* @see com.android.permissioncontroller.permission.ui.television.ManagePermissionsOtherFragment
*/
val additionalPermissionGroups: LiveData<List<PermGroupPackagesUiInfo>> =
MediatorLiveData<List<PermGroupPackagesUiInfo>>().apply {
addSource(PermGroupsPackagesUiInfoLiveData(app, UsedCustomPermGroupNamesLiveData())) {
permGroups ->
value =
permGroups.values.filterNotNull().filter {
(it.nonSystemUserSetOrPreGranted > 0) or (it.systemUserSetOrPreGranted > 0)
}
}
}
/**
* [LiveData] that indicates whether there any unused or additional permission groups.
*
* @see com.android.permissioncontroller.permission.ui.television.ManagePermissionsFragment
*/
@get:JvmName("hasUnusedOrAdditionalPermissionGroups")
val hasUnusedOrAdditionalPermissionGroups: LiveData<Boolean> =
MediatorLiveData<Boolean>().apply {
val updateValue: (Any?) -> Unit = {
value =
!unusedPermissionGroups.value.isNullOrEmpty() ||
!additionalPermissionGroups.value.isNullOrEmpty()
}
addSource(unusedPermissionGroups, updateValue)
addSource(additionalPermissionGroups, updateValue)
}
}
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