1 /*
2  * Copyright (C) 2023 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 
17 package com.android.server.adservices.rollback;
18 
19 import android.annotation.NonNull;
20 
21 import java.io.IOException;
22 import java.nio.file.Files;
23 import java.nio.file.Path;
24 import java.nio.file.Paths;
25 import java.util.Objects;
26 
27 class RollbackHandlingDatastoreLocationHelper {
28     private static final String ROLLBACK_HANDLING_DIR = "rollback";
29 
30     /**
31      * Get the rollback handling data store location, and initialize the path if it does not exist.
32      */
getRollbackHandlingDataStoreDirAndCreateDir( @onNull String baseDir, int userIdentifier)33     static String getRollbackHandlingDataStoreDirAndCreateDir(
34             @NonNull String baseDir, int userIdentifier) throws IOException {
35         Objects.requireNonNull(baseDir, "Base dir must be provided.");
36         String rollbackHandlingDataStoreDir =
37                 baseDir + "/" + userIdentifier + "/" + ROLLBACK_HANDLING_DIR;
38         final Path packageDir = Paths.get(rollbackHandlingDataStoreDir);
39         if (!Files.exists(packageDir)) {
40             Files.createDirectories(packageDir);
41         }
42         return rollbackHandlingDataStoreDir;
43     }
44 }
45