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package com.android.server.deviceconfig;
import android.annotation.NonNull;
import android.app.AlarmManager;
import android.app.Notification;
import android.app.Notification.Action;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.IntentFilter;
import android.content.BroadcastReceiver;
import android.content.Intent;
import android.content.pm.PackageManager.NameNotFoundException;
import android.content.Context;
import android.graphics.drawable.Icon;
import android.os.PowerManager;
import android.provider.DeviceConfig.OnPropertiesChangedListener;
import android.provider.DeviceConfig.Properties;
import android.util.Slog;
import com.android.server.deviceconfig.resources.R;
import java.time.Instant;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import static android.app.NotificationManager.IMPORTANCE_HIGH;
import static java.time.temporal.ChronoUnit.SECONDS;
/**
* Creates notifications when flags are staged on the device.
*
* The notification alerts the user to reboot, to apply the staged flags.
*
* @hide
*/
class BootNotificationCreator implements OnPropertiesChangedListener {
private static final String TAG = "DeviceConfigBootNotificationCreator";
private static final String RESOURCES_PACKAGE =
"com.android.server.deviceconfig.resources";
private static final String REBOOT_REASON = "DeviceConfig";
private static final String ACTION_TRIGGER_HARD_REBOOT =
"com.android.server.deviceconfig.TRIGGER_HARD_REBOOT";
private static final String ACTION_POST_NOTIFICATION =
"com.android.server.deviceconfig.POST_NOTIFICATION";
private static final String CHANNEL_ID = "trunk-stable-flags";
private static final String CHANNEL_NAME = "Trunkfood flags";
private static final int NOTIFICATION_ID = 111555;
private NotificationManager notificationManager;
private PowerManager powerManager;
private AlarmManager alarmManager;
private Context context;
private static final int REBOOT_HOUR = 10;
private static final int REBOOT_MINUTE = 0;
private static final int MIN_SECONDS_TO_SHOW_NOTIF = 86400;
private LocalDateTime lastReboot;
public BootNotificationCreator(@NonNull Context context) {
this.context = context;
this.context.registerReceiver(
new HardRebootBroadcastReceiver(),
new IntentFilter(ACTION_TRIGGER_HARD_REBOOT),
Context.RECEIVER_EXPORTED);
this.context.registerReceiver(
new PostNotificationBroadcastReceiver(),
new IntentFilter(ACTION_POST_NOTIFICATION),
Context.RECEIVER_EXPORTED);
this.lastReboot = LocalDateTime.now(ZoneId.systemDefault());
}
@Override
public void onPropertiesChanged(Properties properties) {
if (!tryInitializeDependenciesIfNeeded()) {
Slog.i(TAG, "not posting notif; service dependencies not ready");
return;
}
PendingIntent pendingIntent =
PendingIntent.getBroadcast(
context,
/* requestCode= */ 1,
new Intent(ACTION_POST_NOTIFICATION),
PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_IMMUTABLE);
ZonedDateTime now = Instant
.ofEpochMilli(System.currentTimeMillis())
.atZone(ZoneId.systemDefault());
LocalDateTime currentTime = now.toLocalDateTime();
LocalDateTime postTime = now.toLocalDate().atTime(REBOOT_HOUR, REBOOT_MINUTE);
LocalDateTime scheduledPostTime =
currentTime.isBefore(postTime) ? postTime : postTime.plusDays(1);
long scheduledPostTimeLong = scheduledPostTime
.atZone(ZoneId.systemDefault())
.toInstant()
.toEpochMilli();
alarmManager.setExact(
AlarmManager.RTC_WAKEUP, scheduledPostTimeLong, pendingIntent);
}
private class PostNotificationBroadcastReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
LocalDateTime now = LocalDateTime.now(ZoneId.systemDefault());
if (lastReboot.until(now, SECONDS) < MIN_SECONDS_TO_SHOW_NOTIF) {
Slog.w(TAG, "not enough time passed, punting");
tryAgainIn24Hours(now);
return;
}
PendingIntent pendingIntent =
PendingIntent.getBroadcast(
context,
/* requestCode= */ 1,
new Intent(ACTION_TRIGGER_HARD_REBOOT),
PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_IMMUTABLE);
try {
Context resourcesContext = context.createPackageContext(RESOURCES_PACKAGE, 0);
Action action = new Action.Builder(
Icon.createWithResource(resourcesContext, R.drawable.ic_restart),
resourcesContext.getString(R.string.boot_notification_action_text),
pendingIntent).build();
Notification notification = new Notification.Builder(context, CHANNEL_ID)
.setContentText(resourcesContext.getString(R.string.boot_notification_content))
.setContentTitle(resourcesContext.getString(R.string.boot_notification_title))
.setSmallIcon(Icon.createWithResource(resourcesContext, R.drawable.ic_flag))
.addAction(action)
.build();
notificationManager.notify(NOTIFICATION_ID, notification);
} catch (NameNotFoundException e) {
Slog.e(TAG, "failed to post boot notification", e);
}
}
private void tryAgainIn24Hours(LocalDateTime currentTime) {
PendingIntent pendingIntent =
PendingIntent.getBroadcast(
context,
/* requestCode= */ 1,
new Intent(ACTION_POST_NOTIFICATION),
PendingIntent.FLAG_UPDATE_CURRENT | PendingIntent.FLAG_IMMUTABLE);
LocalDateTime postTime =
currentTime.toLocalDate().atTime(REBOOT_HOUR, REBOOT_MINUTE).plusDays(1);
long scheduledPostTimeLong = postTime
.atZone(ZoneId.systemDefault())
.toInstant()
.toEpochMilli();
alarmManager.setExact(
AlarmManager.RTC_WAKEUP, scheduledPostTimeLong, pendingIntent);
}
}
private class HardRebootBroadcastReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
powerManager.reboot(REBOOT_REASON);
}
}
/**
* If deps are not initialized yet, try to initialize them.
*
* @return true if the dependencies are newly or already initialized,
* or false if they are not ready yet
*/
private boolean tryInitializeDependenciesIfNeeded() {
if (notificationManager == null) {
notificationManager = context.getSystemService(NotificationManager.class);
if (notificationManager != null) {
notificationManager.createNotificationChannel(
new NotificationChannel(CHANNEL_ID, CHANNEL_NAME, IMPORTANCE_HIGH));
}
}
if (alarmManager == null) {
alarmManager = context.getSystemService(AlarmManager.class);
}
if (powerManager == null) {
powerManager = context.getSystemService(PowerManager.class);
}
return notificationManager != null
&& alarmManager != null
&& powerManager != null;
}
}
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