| /* |
| * Copyright (C) 2021 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.settingslib.wifi; |
| |
| import static android.os.UserManager.DISALLOW_CONFIG_WIFI; |
| |
| import android.annotation.NonNull; |
| import android.content.Context; |
| import android.os.Bundle; |
| import android.os.UserManager; |
| import android.util.SparseArray; |
| |
| import androidx.annotation.VisibleForTesting; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| /** |
| * This is a singleton class for Wi-Fi restrictions caching. |
| */ |
| public class WifiRestrictionsCache { |
| private static final String TAG = "WifiResCache"; |
| |
| /** |
| * Manages mapping between user ID and corresponding singleton {@link WifiRestrictionsCache} |
| * object. |
| */ |
| @VisibleForTesting |
| protected static final SparseArray<WifiRestrictionsCache> sInstances = new SparseArray<>(); |
| |
| @VisibleForTesting |
| protected UserManager mUserManager; |
| @VisibleForTesting |
| protected Bundle mUserRestrictions; |
| @VisibleForTesting |
| protected final Map<String, Boolean> mRestrictions = new HashMap<>(); |
| |
| /** |
| * @return an instance of {@link WifiRestrictionsCache} object. |
| */ |
| @NonNull |
| public static WifiRestrictionsCache getInstance(@NonNull Context context) { |
| final int requestUserId = context.getUserId(); |
| WifiRestrictionsCache cache; |
| synchronized (sInstances) { |
| // We have same user context as request. |
| if (sInstances.indexOfKey(requestUserId) >= 0) { |
| return sInstances.get(requestUserId); |
| } |
| // Request by a new user context. |
| cache = new WifiRestrictionsCache(context); |
| sInstances.put(context.getUserId(), cache); |
| } |
| return cache; |
| } |
| |
| /** |
| * Removes all the instances. |
| */ |
| public static void clearInstance() { |
| synchronized (sInstances) { |
| for (int i = 0; i < sInstances.size(); i++) { |
| int key = sInstances.keyAt(i); |
| WifiRestrictionsCache cache = sInstances.get(key); |
| cache.clearRestrictions(); |
| sInstances.remove(key); |
| } |
| sInstances.clear(); |
| } |
| } |
| |
| /** |
| * Constructor to create a singleton class for Wi-Fi restrictions cache. |
| * |
| * @param context The Context this is associated with. |
| */ |
| protected WifiRestrictionsCache(@NonNull Context context) { |
| mUserManager = context.getSystemService(UserManager.class); |
| if (mUserManager != null) { |
| mUserRestrictions = mUserManager.getUserRestrictions(); |
| } |
| } |
| |
| /** |
| * @return the boolean value of the restrictions |
| */ |
| public Boolean getRestriction(String key) { |
| if (mUserRestrictions == null) { |
| return false; |
| } |
| Boolean restriction; |
| synchronized (mRestrictions) { |
| if (mRestrictions.containsKey(key)) { |
| return mRestrictions.get(key); |
| } |
| restriction = mUserRestrictions.getBoolean(key); |
| mRestrictions.put(key, restriction); |
| } |
| return restriction; |
| } |
| |
| /** |
| * Removes all the restrictions. |
| */ |
| public void clearRestrictions() { |
| synchronized (mRestrictions) { |
| mRestrictions.clear(); |
| } |
| } |
| |
| /** |
| * @return Whether the user is allowed to config Wi-Fi. |
| */ |
| public Boolean isConfigWifiAllowed() { |
| return !getRestriction(DISALLOW_CONFIG_WIFI); |
| } |
| } |