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/*
* Copyright (C) 2016 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.settings.datausage;
import static android.net.NetworkPolicyManager.POLICY_ALLOW_METERED_BACKGROUND;
import static android.net.NetworkPolicyManager.POLICY_NONE;
import static android.net.NetworkPolicyManager.POLICY_REJECT_METERED_BACKGROUND;
import android.app.settings.SettingsEnums;
import android.content.Context;
import android.net.NetworkPolicyManager;
import android.util.SparseIntArray;
import com.android.settings.overlay.FeatureFactory;
import com.android.settingslib.core.instrumentation.MetricsFeatureProvider;
import com.android.settingslib.utils.ThreadUtils;
import java.util.ArrayList;
public class DataSaverBackend {
private static final String TAG = "DataSaverBackend";
private final Context mContext;
private final MetricsFeatureProvider mMetricsFeatureProvider;
private final NetworkPolicyManager mPolicyManager;
private final ArrayList<Listener> mListeners = new ArrayList<>();
private SparseIntArray mUidPolicies = new SparseIntArray();
private boolean mAllowlistInitialized;
private boolean mDenylistInitialized;
// TODO: Staticize into only one.
public DataSaverBackend(Context context) {
mContext = context;
mMetricsFeatureProvider = FeatureFactory.getFactory(context).getMetricsFeatureProvider();
mPolicyManager = NetworkPolicyManager.from(context);
}
public void addListener(Listener listener) {
mListeners.add(listener);
if (mListeners.size() == 1) {
mPolicyManager.registerListener(mPolicyListener);
}
listener.onDataSaverChanged(isDataSaverEnabled());
}
public void remListener(Listener listener) {
mListeners.remove(listener);
if (mListeners.size() == 0) {
mPolicyManager.unregisterListener(mPolicyListener);
}
}
public boolean isDataSaverEnabled() {
return mPolicyManager.getRestrictBackground();
}
public void setDataSaverEnabled(boolean enabled) {
mPolicyManager.setRestrictBackground(enabled);
mMetricsFeatureProvider.action(
mContext, SettingsEnums.ACTION_DATA_SAVER_MODE, enabled ? 1 : 0);
}
public void refreshAllowlist() {
loadAllowlist();
}
public void setIsAllowlisted(int uid, String packageName, boolean allowlisted) {
final int policy = allowlisted ? POLICY_ALLOW_METERED_BACKGROUND : POLICY_NONE;
mPolicyManager.setUidPolicy(uid, policy);
mUidPolicies.put(uid, policy);
if (allowlisted) {
mMetricsFeatureProvider.action(
mContext, SettingsEnums.ACTION_DATA_SAVER_WHITELIST, packageName);
}
}
public boolean isAllowlisted(int uid) {
loadAllowlist();
return mUidPolicies.get(uid, POLICY_NONE) == POLICY_ALLOW_METERED_BACKGROUND;
}
private void loadAllowlist() {
if (mAllowlistInitialized) {
return;
}
for (int uid : mPolicyManager.getUidsWithPolicy(POLICY_ALLOW_METERED_BACKGROUND)) {
mUidPolicies.put(uid, POLICY_ALLOW_METERED_BACKGROUND);
}
mAllowlistInitialized = true;
}
public void refreshDenylist() {
loadDenylist();
}
public void setIsDenylisted(int uid, String packageName, boolean denylisted) {
final int policy = denylisted ? POLICY_REJECT_METERED_BACKGROUND : POLICY_NONE;
mPolicyManager.setUidPolicy(uid, policy);
mUidPolicies.put(uid, policy);
if (denylisted) {
mMetricsFeatureProvider.action(
mContext, SettingsEnums.ACTION_DATA_SAVER_BLACKLIST, packageName);
}
}
public boolean isDenylisted(int uid) {
loadDenylist();
return mUidPolicies.get(uid, POLICY_NONE) == POLICY_REJECT_METERED_BACKGROUND;
}
private void loadDenylist() {
if (mDenylistInitialized) {
return;
}
for (int uid : mPolicyManager.getUidsWithPolicy(POLICY_REJECT_METERED_BACKGROUND)) {
mUidPolicies.put(uid, POLICY_REJECT_METERED_BACKGROUND);
}
mDenylistInitialized = true;
}
private void handleRestrictBackgroundChanged(boolean isDataSaving) {
for (int i = 0; i < mListeners.size(); i++) {
mListeners.get(i).onDataSaverChanged(isDataSaving);
}
}
private void handleAllowlistChanged(int uid, boolean isAllowlisted) {
for (int i = 0; i < mListeners.size(); i++) {
mListeners.get(i).onAllowlistStatusChanged(uid, isAllowlisted);
}
}
private void handleDenylistChanged(int uid, boolean isDenylisted) {
for (int i = 0; i < mListeners.size(); i++) {
mListeners.get(i).onDenylistStatusChanged(uid, isDenylisted);
}
}
private void handleUidPoliciesChanged(int uid, int newPolicy) {
loadAllowlist();
loadDenylist();
final int oldPolicy = mUidPolicies.get(uid, POLICY_NONE);
if (newPolicy == POLICY_NONE) {
mUidPolicies.delete(uid);
} else {
mUidPolicies.put(uid, newPolicy);
}
final boolean wasAllowlisted = oldPolicy == POLICY_ALLOW_METERED_BACKGROUND;
final boolean wasDenylisted = oldPolicy == POLICY_REJECT_METERED_BACKGROUND;
final boolean isAllowlisted = newPolicy == POLICY_ALLOW_METERED_BACKGROUND;
final boolean isDenylisted = newPolicy == POLICY_REJECT_METERED_BACKGROUND;
if (wasAllowlisted != isAllowlisted) {
handleAllowlistChanged(uid, isAllowlisted);
}
if (wasDenylisted != isDenylisted) {
handleDenylistChanged(uid, isDenylisted);
}
}
private final NetworkPolicyManager.Listener mPolicyListener =
new NetworkPolicyManager.Listener() {
@Override
public void onUidPoliciesChanged(final int uid, final int uidPolicies) {
ThreadUtils.postOnMainThread(() -> handleUidPoliciesChanged(uid, uidPolicies));
}
@Override
public void onRestrictBackgroundChanged(final boolean isDataSaving) {
ThreadUtils.postOnMainThread(() -> handleRestrictBackgroundChanged(isDataSaving));
}
};
public interface Listener {
void onDataSaverChanged(boolean isDataSaving);
void onAllowlistStatusChanged(int uid, boolean isAllowlisted);
void onDenylistStatusChanged(int uid, boolean isDenylisted);
}
}
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