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.server.backup;
18
19import android.accounts.AccountManagerInternal;
20import android.app.backup.BlobBackupHelper;
21import android.os.UserHandle;
22import android.util.Slog;
23import com.android.server.LocalServices;
24
25/**
26 * Helper for handling backup of account manager specific state.
27 */
28public class AccountManagerBackupHelper extends BlobBackupHelper {
29    private static final String TAG = "AccountsBackup";
30    private static final boolean DEBUG = false;
31
32    // current schema of the backup state blob
33    private static final int STATE_VERSION = 1;
34
35    // key under which the account access grant state blob is committed to backup
36    private static final String KEY_ACCOUNT_ACCESS_GRANTS = "account_access_grants";
37
38    public AccountManagerBackupHelper() {
39        super(STATE_VERSION, KEY_ACCOUNT_ACCESS_GRANTS);
40    }
41
42    @Override
43    protected byte[] getBackupPayload(String key) {
44        AccountManagerInternal am = LocalServices.getService(AccountManagerInternal.class);
45        if (DEBUG) {
46            Slog.d(TAG, "Handling backup of " + key);
47        }
48        try {
49            switch (key) {
50                case KEY_ACCOUNT_ACCESS_GRANTS: {
51                    return am.backupAccountAccessPermissions(UserHandle.USER_SYSTEM);
52                }
53
54                default: {
55                    Slog.w(TAG, "Unexpected backup key " + key);
56                }
57            }
58        } catch (Exception e) {
59            Slog.e(TAG, "Unable to store payload " + key);
60        }
61
62        return new byte[0];
63    }
64
65    @Override
66    protected void applyRestoredPayload(String key, byte[] payload) {
67        AccountManagerInternal am = LocalServices.getService(AccountManagerInternal.class);
68        if (DEBUG) {
69            Slog.d(TAG, "Handling restore of " + key);
70        }
71        try {
72            switch (key) {
73                case KEY_ACCOUNT_ACCESS_GRANTS: {
74                    am.restoreAccountAccessPermissions(payload, UserHandle.USER_SYSTEM);
75                } break;
76
77                default: {
78                    Slog.w(TAG, "Unexpected restore key " + key);
79                }
80            }
81        } catch (Exception e) {
82            Slog.w(TAG, "Unable to restore key " + key);
83        }
84    }
85}
86