1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.packageinstaller;
18
19import android.app.Notification;
20import android.app.NotificationChannel;
21import android.app.NotificationManager;
22import android.app.PendingIntent;
23import android.app.admin.IDevicePolicyManager;
24import android.content.BroadcastReceiver;
25import android.content.Context;
26import android.content.Intent;
27import android.content.pm.ApplicationInfo;
28import android.content.pm.IPackageManager;
29import android.content.pm.PackageInstaller;
30import android.content.pm.PackageManager;
31import android.content.pm.UserInfo;
32import android.graphics.drawable.Icon;
33import android.os.RemoteException;
34import android.os.ServiceManager;
35import android.os.UserHandle;
36import android.os.UserManager;
37import android.provider.Settings;
38import android.support.annotation.NonNull;
39import android.util.Log;
40import android.widget.Toast;
41
42import java.util.List;
43
44/**
45 * Finish an uninstallation and show Toast on success or failure notification.
46 */
47public class UninstallFinish extends BroadcastReceiver {
48    private static final String LOG_TAG = UninstallFinish.class.getSimpleName();
49
50    private static final String UNINSTALL_FAILURE_CHANNEL = "uninstall failure";
51
52    static final String EXTRA_UNINSTALL_ID = "com.android.packageinstaller.extra.UNINSTALL_ID";
53    static final String EXTRA_APP_LABEL = "com.android.packageinstaller.extra.APP_LABEL";
54
55    @Override
56    public void onReceive(Context context, Intent intent) {
57        int returnCode = intent.getIntExtra(PackageInstaller.EXTRA_STATUS, 0);
58
59        Log.i(LOG_TAG, "Uninstall finished extras=" + intent.getExtras());
60
61        if (returnCode == PackageInstaller.STATUS_PENDING_USER_ACTION) {
62            context.startActivity(intent.getParcelableExtra(Intent.EXTRA_INTENT));
63            return;
64        }
65
66        int uninstallId = intent.getIntExtra(EXTRA_UNINSTALL_ID, 0);
67        ApplicationInfo appInfo = intent.getParcelableExtra(
68                PackageUtil.INTENT_ATTR_APPLICATION_INFO);
69        String appLabel = intent.getStringExtra(EXTRA_APP_LABEL);
70        boolean allUsers = intent.getBooleanExtra(Intent.EXTRA_UNINSTALL_ALL_USERS, false);
71
72        NotificationManager notificationManager =
73                context.getSystemService(NotificationManager.class);
74        UserManager userManager = context.getSystemService(UserManager.class);
75
76        NotificationChannel uninstallFailureChannel = new NotificationChannel(
77                UNINSTALL_FAILURE_CHANNEL,
78                context.getString(R.string.uninstall_failure_notification_channel),
79                NotificationManager.IMPORTANCE_DEFAULT);
80        notificationManager.createNotificationChannel(uninstallFailureChannel);
81
82        Notification.Builder uninstallFailedNotification = new Notification.Builder(context,
83                UNINSTALL_FAILURE_CHANNEL);
84
85        switch (returnCode) {
86            case PackageInstaller.STATUS_SUCCESS:
87                notificationManager.cancel(uninstallId);
88
89                Toast.makeText(context, context.getString(R.string.uninstall_done_app, appLabel),
90                        Toast.LENGTH_LONG).show();
91                return;
92            case PackageInstaller.STATUS_FAILURE_BLOCKED: {
93                int legacyStatus = intent.getIntExtra(PackageInstaller.EXTRA_LEGACY_STATUS, 0);
94
95                switch (legacyStatus) {
96                    case PackageManager.DELETE_FAILED_DEVICE_POLICY_MANAGER: {
97                        IDevicePolicyManager dpm = IDevicePolicyManager.Stub.asInterface(
98                                ServiceManager.getService(Context.DEVICE_POLICY_SERVICE));
99                        // Find out if the package is an active admin for some non-current user.
100                        int myUserId = UserHandle.myUserId();
101                        UserInfo otherBlockingUser = null;
102                        for (UserInfo user : userManager.getUsers()) {
103                            // We only catch the case when the user in question is neither the
104                            // current user nor its profile.
105                            if (isProfileOfOrSame(userManager, myUserId, user.id)) {
106                                continue;
107                            }
108
109                            try {
110                                if (dpm.packageHasActiveAdmins(appInfo.packageName, user.id)) {
111                                    otherBlockingUser = user;
112                                    break;
113                                }
114                            } catch (RemoteException e) {
115                                Log.e(LOG_TAG, "Failed to talk to package manager", e);
116                            }
117                        }
118                        if (otherBlockingUser == null) {
119                            Log.d(LOG_TAG, "Uninstall failed because " + appInfo.packageName
120                                    + " is a device admin");
121
122                            addDeviceManagerButton(context, uninstallFailedNotification);
123                            setBigText(uninstallFailedNotification, context.getString(
124                                    R.string.uninstall_failed_device_policy_manager));
125                        } else {
126                            Log.d(LOG_TAG, "Uninstall failed because " + appInfo.packageName
127                                    + " is a device admin of user " + otherBlockingUser);
128
129                            setBigText(uninstallFailedNotification, String.format(context.getString(
130                                    R.string.uninstall_failed_device_policy_manager_of_user),
131                                    otherBlockingUser.name));
132                        }
133                        break;
134                    }
135                    case PackageManager.DELETE_FAILED_OWNER_BLOCKED: {
136                        IPackageManager packageManager = IPackageManager.Stub.asInterface(
137                                ServiceManager.getService("package"));
138
139                        List<UserInfo> users = userManager.getUsers();
140                        int blockingUserId = UserHandle.USER_NULL;
141                        for (int i = 0; i < users.size(); ++i) {
142                            final UserInfo user = users.get(i);
143                            try {
144                                if (packageManager.getBlockUninstallForUser(appInfo.packageName,
145                                        user.id)) {
146                                    blockingUserId = user.id;
147                                    break;
148                                }
149                            } catch (RemoteException e) {
150                                // Shouldn't happen.
151                                Log.e(LOG_TAG, "Failed to talk to package manager", e);
152                            }
153                        }
154
155                        int myUserId = UserHandle.myUserId();
156                        if (isProfileOfOrSame(userManager, myUserId, blockingUserId)) {
157                            addDeviceManagerButton(context, uninstallFailedNotification);
158                        } else {
159                            addManageUsersButton(context, uninstallFailedNotification);
160                        }
161
162                        if (blockingUserId == UserHandle.USER_NULL) {
163                            Log.d(LOG_TAG,
164                                    "Uninstall failed for " + appInfo.packageName + " with code "
165                                            + returnCode + " no blocking user");
166                        } else if (blockingUserId == UserHandle.USER_SYSTEM) {
167                            setBigText(uninstallFailedNotification,
168                                    context.getString(R.string.uninstall_blocked_device_owner));
169                        } else {
170                            if (allUsers) {
171                                setBigText(uninstallFailedNotification,
172                                        context.getString(
173                                                R.string.uninstall_all_blocked_profile_owner));
174                            } else {
175                                setBigText(uninstallFailedNotification, context.getString(
176                                        R.string.uninstall_blocked_profile_owner));
177                            }
178                        }
179                        break;
180                    }
181                    default:
182                        Log.d(LOG_TAG, "Uninstall blocked for " + appInfo.packageName
183                                + " with legacy code " + legacyStatus);
184                } break;
185            }
186            default:
187                Log.d(LOG_TAG, "Uninstall failed for " + appInfo.packageName + " with code "
188                        + returnCode);
189                break;
190        }
191
192        uninstallFailedNotification.setContentTitle(
193                context.getString(R.string.uninstall_failed_app, appLabel));
194        uninstallFailedNotification.setOngoing(false);
195        uninstallFailedNotification.setSmallIcon(R.drawable.ic_error);
196        notificationManager.notify(uninstallId, uninstallFailedNotification.build());
197    }
198
199    /**
200     * Is a profile part of a user?
201     *
202     * @param userManager The user manager
203     * @param userId The id of the user
204     * @param profileId The id of the profile
205     *
206     * @return If the profile is part of the user or the profile parent of the user
207     */
208    private boolean isProfileOfOrSame(@NonNull UserManager userManager, int userId, int profileId) {
209        if (userId == profileId) {
210            return true;
211        }
212
213        UserInfo parentUser = userManager.getProfileParent(profileId);
214        return parentUser != null && parentUser.id == userId;
215    }
216
217    /**
218     * Set big text for the notification.
219     *
220     * @param builder The builder of the notification
221     * @param text The text to set.
222     */
223    private void setBigText(@NonNull Notification.Builder builder,
224            @NonNull CharSequence text) {
225        builder.setStyle(new Notification.BigTextStyle().bigText(text));
226    }
227
228    /**
229     * Add a button to the notification that links to the user management.
230     *
231     * @param context The context the notification is created in
232     * @param builder The builder of the notification
233     */
234    private void addManageUsersButton(@NonNull Context context,
235            @NonNull Notification.Builder builder) {
236        Intent intent = new Intent(Settings.ACTION_USER_SETTINGS);
237        intent.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY | Intent.FLAG_ACTIVITY_NEW_TASK);
238
239        builder.addAction((new Notification.Action.Builder(
240                Icon.createWithResource(context, R.drawable.ic_settings_multiuser),
241                context.getString(R.string.manage_users),
242                PendingIntent.getActivity(context, 0, intent,
243                        PendingIntent.FLAG_UPDATE_CURRENT))).build());
244    }
245
246    /**
247     * Add a button to the notification that links to the device policy management.
248     *
249     * @param context The context the notification is created in
250     * @param builder The builder of the notification
251     */
252    private void addDeviceManagerButton(@NonNull Context context,
253            @NonNull Notification.Builder builder) {
254        Intent intent = new Intent();
255        intent.setClassName("com.android.settings",
256                "com.android.settings.Settings$DeviceAdminSettingsActivity");
257        intent.setFlags(Intent.FLAG_ACTIVITY_NO_HISTORY | Intent.FLAG_ACTIVITY_NEW_TASK);
258
259        builder.addAction((new Notification.Action.Builder(
260                Icon.createWithResource(context, R.drawable.ic_lock),
261                context.getString(R.string.manage_device_administrators),
262                PendingIntent.getActivity(context, 0, intent,
263                        PendingIntent.FLAG_UPDATE_CURRENT))).build());
264    }
265}
266