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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.adservices.service.common;
import android.annotation.NonNull;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import com.android.adservices.LogUtil;
import com.android.adservices.concurrency.AdServicesExecutors;
import com.android.adservices.data.consent.AppConsentDao;
import com.android.adservices.data.customaudience.CustomAudienceDatabase;
import com.android.adservices.service.FlagsFactory;
import com.android.adservices.service.measurement.MeasurementImpl;
import com.android.adservices.service.topics.TopicsWorker;
import com.android.internal.annotations.VisibleForTesting;
import java.io.IOException;
import java.util.Objects;
import java.util.concurrent.Executor;
/**
* Receiver to receive a com.android.adservices.PACKAGE_CHANGED broadcast from the AdServices system
* service when package install/uninstalls occur.
*/
public class PackageChangedReceiver extends BroadcastReceiver {
/**
* Broadcast send from the system service to the AdServices module when a package has been
* installed/uninstalled.
*/
public static final String PACKAGE_CHANGED_BROADCAST = "com.android.adservices.PACKAGE_CHANGED";
/** Key for designating if the action was an installation or an uninstallation. */
public static final String ACTION_KEY = "action";
/** Value if the package change was an uninstallation. */
public static final String PACKAGE_FULLY_REMOVED = "package_fully_removed";
/** Value if the package change was an installation. */
public static final String PACKAGE_ADDED = "package_added";
/** Value if the package had its data cleared. */
public static final String PACKAGE_DATA_CLEARED = "package_data_cleared";
private static final Executor sBackgroundExecutor = AdServicesExecutors.getBackgroundExecutor();
@Override
public void onReceive(Context context, Intent intent) {
LogUtil.d("PackageChangedReceiver received a broadcast: " + intent.getAction());
switch (intent.getAction()) {
case PACKAGE_CHANGED_BROADCAST:
Uri packageUri = Uri.parse(intent.getData().getSchemeSpecificPart());
int packageUid = intent.getIntExtra(Intent.EXTRA_UID, -1);
switch (intent.getStringExtra(ACTION_KEY)) {
case PACKAGE_FULLY_REMOVED:
measurementOnPackageFullyRemoved(context, packageUri);
topicsOnPackageFullyRemoved(context, packageUri);
fledgeOnPackageFullyRemovedOrDataCleared(context, packageUri);
consentOnPackageFullyRemoved(context, packageUri, packageUid);
break;
case PACKAGE_ADDED:
measurementOnPackageAdded(context, packageUri);
topicsOnPackageAdded(context, packageUri);
break;
case PACKAGE_DATA_CLEARED:
measurementOnPackageDataCleared(context, packageUri);
fledgeOnPackageFullyRemovedOrDataCleared(context, packageUri);
break;
}
break;
}
}
@VisibleForTesting
void measurementOnPackageFullyRemoved(Context context, Uri packageUri) {
if (FlagsFactory.getFlags().getMeasurementReceiverDeletePackagesKillSwitch()) {
LogUtil.e("Measurement Delete Packages Receiver is disabled");
return;
}
LogUtil.d("Package Fully Removed:" + packageUri);
sBackgroundExecutor.execute(
() -> MeasurementImpl.getInstance(context).deletePackageRecords(packageUri));
}
@VisibleForTesting
void measurementOnPackageDataCleared(Context context, Uri packageUri) {
if (FlagsFactory.getFlags().getMeasurementReceiverDeletePackagesKillSwitch()) {
LogUtil.e("Measurement Delete Packages Receiver is disabled");
return;
}
LogUtil.d("Package Data Cleared: " + packageUri);
sBackgroundExecutor.execute(
() -> MeasurementImpl.getInstance(context).deletePackageRecords(packageUri));
}
@VisibleForTesting
void measurementOnPackageAdded(Context context, Uri packageUri) {
if (FlagsFactory.getFlags().getMeasurementReceiverInstallAttributionKillSwitch()) {
LogUtil.e("Measurement Install Attribution Receiver is disabled");
return;
}
LogUtil.d("Package Added: " + packageUri);
sBackgroundExecutor.execute(
() ->
MeasurementImpl.getInstance(context)
.doInstallAttribution(packageUri, System.currentTimeMillis()));
}
@VisibleForTesting
void topicsOnPackageFullyRemoved(Context context, @NonNull Uri packageUri) {
if (FlagsFactory.getFlags().getTopicsKillSwitch()) {
LogUtil.e("Topics API is disabled");
return;
}
LogUtil.d("Deleting topics data for package: " + packageUri.toString());
sBackgroundExecutor.execute(
() -> TopicsWorker.getInstance(context).deletePackageData(packageUri));
}
@VisibleForTesting
void topicsOnPackageAdded(Context context, @NonNull Uri packageUri) {
LogUtil.d("Package Added for topics API: " + packageUri.toString());
sBackgroundExecutor.execute(
() -> TopicsWorker.getInstance(context).handleAppInstallation(packageUri));
}
/** Deletes FLEDGE custom audience data belonging to the given application. */
@VisibleForTesting
void fledgeOnPackageFullyRemovedOrDataCleared(
@NonNull Context context, @NonNull Uri packageUri) {
Objects.requireNonNull(context);
Objects.requireNonNull(packageUri);
if (FlagsFactory.getFlags().getFledgeCustomAudienceServiceKillSwitch()) {
LogUtil.v("FLEDGE CA API is disabled");
return;
}
LogUtil.d("Deleting custom audience data for package: " + packageUri);
sBackgroundExecutor.execute(
() ->
getCustomAudienceDatabase(context)
.customAudienceDao()
.deleteCustomAudienceDataByOwner(packageUri.toString()));
}
/** Deletes a consent setting for the given application and UID. */
@VisibleForTesting
void consentOnPackageFullyRemoved(
@NonNull Context context, @NonNull Uri packageUri, int packageUid) {
Objects.requireNonNull(context);
Objects.requireNonNull(packageUri);
LogUtil.d(
"Deleting consent data for package %s with UID %d",
packageUri.toString(), packageUid);
sBackgroundExecutor.execute(
() -> {
try {
AppConsentDao.getInstance(context)
.clearConsentForUninstalledApp(packageUri.toString(), packageUid);
} catch (IOException e) {
LogUtil.e("Failed to initialize or write to the app consent datastore");
}
});
}
/**
* Returns an instance of the {@link CustomAudienceDatabase}.
*
* <p>This is split out for testing/mocking purposes only, since the {@link
* CustomAudienceDatabase} is abstract and therefore unmockable.
*/
@VisibleForTesting
CustomAudienceDatabase getCustomAudienceDatabase(@NonNull Context context) {
Objects.requireNonNull(context);
return CustomAudienceDatabase.getInstance(context);
}
}
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