1 /*
2  * Copyright (C) 2020 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.blob;
18 
19 import static com.android.server.blob.BlobStoreConfig.TAG;
20 
21 import android.annotation.IdRes;
22 import android.annotation.NonNull;
23 import android.annotation.Nullable;
24 import android.content.Context;
25 import android.content.pm.PackageManager;
26 import android.content.res.Resources;
27 import android.os.UserHandle;
28 import android.text.format.TimeMigrationUtils;
29 import android.util.Slog;
30 
31 class BlobStoreUtils {
32     private static final String DESC_RES_TYPE_STRING = "string";
33 
34     @Nullable
getPackageResources(@onNull Context context, @NonNull String packageName, int userId)35     static Resources getPackageResources(@NonNull Context context,
36             @NonNull String packageName, int userId) {
37         try {
38             return context.createContextAsUser(UserHandle.of(userId), /* flags */ 0)
39                     .getPackageManager().getResourcesForApplication(packageName);
40         } catch (PackageManager.NameNotFoundException e) {
41             Slog.d(TAG, "Unknown package in user " + userId + ": "
42                     + packageName, e);
43             return null;
44         }
45     }
46 
47     @IdRes
getDescriptionResourceId(@onNull Resources resources, @NonNull String resourceEntryName, @NonNull String packageName)48     static int getDescriptionResourceId(@NonNull Resources resources,
49             @NonNull String resourceEntryName, @NonNull String packageName) {
50         return resources.getIdentifier(resourceEntryName, DESC_RES_TYPE_STRING, packageName);
51     }
52 
53     @IdRes
getDescriptionResourceId(@onNull Context context, @NonNull String resourceEntryName, @NonNull String packageName, int userId)54     static int getDescriptionResourceId(@NonNull Context context,
55             @NonNull String resourceEntryName, @NonNull String packageName, int userId) {
56         final Resources resources = getPackageResources(context, packageName, userId);
57         return resources == null
58                 ? Resources.ID_NULL
59                 : getDescriptionResourceId(resources, resourceEntryName, packageName);
60     }
61 
62     @NonNull
formatTime(long timeMs)63     static String formatTime(long timeMs) {
64         return TimeMigrationUtils.formatMillisWithFixedFormat(timeMs);
65     }
66 }
67