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/*
* Copyright (C) 2014 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.systemui;
import com.android.systemui.statusbar.phone.SystemUIDialog;
import android.app.ActivityManagerNative;
import android.app.Dialog;
import android.content.BroadcastReceiver;
import android.content.ContentResolver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.UserInfo;
import android.os.RemoteException;
import android.os.UserHandle;
import android.os.UserManager;
import android.provider.Settings;
import android.util.Log;
import android.view.WindowManagerGlobal;
/**
* Manages notification when a guest session is resumed.
*/
public class GuestResumeSessionReceiver extends BroadcastReceiver {
private static final String TAG = "GuestResumeSessionReceiver";
private static final String SETTING_GUEST_HAS_LOGGED_IN = "systemui.guest_has_logged_in";
private Dialog mNewSessionDialog;
public void register(Context context) {
IntentFilter f = new IntentFilter(Intent.ACTION_USER_SWITCHED);
context.registerReceiverAsUser(this, UserHandle.OWNER,
f, null /* permission */, null /* scheduler */);
}
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (Intent.ACTION_USER_SWITCHED.equals(action)) {
cancelDialog();
int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL);
if (userId == UserHandle.USER_NULL) {
Log.e(TAG, intent + " sent to " + TAG + " without EXTRA_USER_HANDLE");
return;
}
UserInfo currentUser;
try {
currentUser = ActivityManagerNative.getDefault().getCurrentUser();
} catch (RemoteException e) {
return;
}
if (!currentUser.isGuest()) {
return;
}
ContentResolver cr = context.getContentResolver();
int notFirstLogin = Settings.System.getIntForUser(
cr, SETTING_GUEST_HAS_LOGGED_IN, 0, userId);
if (notFirstLogin != 0) {
mNewSessionDialog = new ResetSessionDialog(context, userId);
mNewSessionDialog.show();
} else {
Settings.System.putIntForUser(
cr, SETTING_GUEST_HAS_LOGGED_IN, 1, userId);
}
}
}
/**
* Wipes the guest session.
*
* The guest must be the current user and its id must be {@param userId}.
*/
private static void wipeGuestSession(Context context, int userId) {
UserManager userManager = (UserManager) context.getSystemService(Context.USER_SERVICE);
UserInfo currentUser;
try {
currentUser = ActivityManagerNative.getDefault().getCurrentUser();
} catch (RemoteException e) {
Log.e(TAG, "Couldn't wipe session because ActivityManager is dead");
return;
}
if (currentUser.id != userId) {
Log.w(TAG, "User requesting to start a new session (" + userId + ")"
+ " is not current user (" + currentUser.id + ")");
return;
}
if (!currentUser.isGuest()) {
Log.w(TAG, "User requesting to start a new session (" + userId + ")"
+ " is not a guest");
return;
}
boolean marked = userManager.markGuestForDeletion(currentUser.id);
if (!marked) {
Log.w(TAG, "Couldn't mark the guest for deletion for user " + userId);
return;
}
UserInfo newGuest = userManager.createGuest(context, currentUser.name);
try {
if (newGuest == null) {
Log.e(TAG, "Could not create new guest, switching back to owner");
ActivityManagerNative.getDefault().switchUser(UserHandle.USER_OWNER);
userManager.removeUser(currentUser.id);
WindowManagerGlobal.getWindowManagerService().lockNow(null /* options */);
return;
}
ActivityManagerNative.getDefault().switchUser(newGuest.id);
userManager.removeUser(currentUser.id);
} catch (RemoteException e) {
Log.e(TAG, "Couldn't wipe session because ActivityManager or WindowManager is dead");
return;
}
}
private void cancelDialog() {
if (mNewSessionDialog != null && mNewSessionDialog.isShowing()) {
mNewSessionDialog.cancel();
mNewSessionDialog = null;
}
}
private static class ResetSessionDialog extends SystemUIDialog implements
DialogInterface.OnClickListener {
private static final int BUTTON_WIPE = BUTTON_NEGATIVE;
private static final int BUTTON_DONTWIPE = BUTTON_POSITIVE;
private final int mUserId;
public ResetSessionDialog(Context context, int userId) {
super(context);
setTitle(context.getString(R.string.guest_wipe_session_title));
setMessage(context.getString(R.string.guest_wipe_session_message));
setCanceledOnTouchOutside(false);
setButton(BUTTON_WIPE,
context.getString(R.string.guest_wipe_session_wipe), this);
setButton(BUTTON_DONTWIPE,
context.getString(R.string.guest_wipe_session_dontwipe), this);
mUserId = userId;
}
@Override
public void onClick(DialogInterface dialog, int which) {
if (which == BUTTON_WIPE) {
wipeGuestSession(getContext(), mUserId);
dismiss();
} else if (which == BUTTON_DONTWIPE) {
cancel();
}
}
}
}
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