content: /*
   * Copyright (C) 2015 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.server.wifi;
  
  import android.net.wifi.ScanResult;
  import android.net.wifi.WifiConfiguration;
  import android.os.UserHandle;
  import android.os.UserManager;
  
  import java.util.Collection;
  import java.util.HashMap;
  import java.util.Iterator;
  import java.util.Map;
  
  public class ConfigurationMap {
      private final Map<Integer, WifiConfiguration> mPerID = new HashMap<>();
  
      private final Map<Integer, WifiConfiguration> mPerIDForCurrentUser = new HashMap<>();
      private final Map<ScanResultMatchInfo, WifiConfiguration>
              mScanResultMatchInfoMapForCurrentUser = new HashMap<>();
  
      private final UserManager mUserManager;
  
      private int mCurrentUserId = UserHandle.USER_SYSTEM;
  
      ConfigurationMap(UserManager userManager) {
          mUserManager = userManager;
      }
  
      // RW methods:
      public WifiConfiguration put(WifiConfiguration config) {
          final WifiConfiguration current = mPerID.put(config.networkId, config);
          if (WifiConfigurationUtil.isVisibleToAnyProfile(config,
                  mUserManager.getProfiles(mCurrentUserId))) {
              mPerIDForCurrentUser.put(config.networkId, config);
              mScanResultMatchInfoMapForCurrentUser.put(
                      ScanResultMatchInfo.fromWifiConfiguration(config), config);
          }
          return current;
      }
  
      public WifiConfiguration remove(int netID) {
          WifiConfiguration config = mPerID.remove(netID);
          if (config == null) {
              return null;
          }
  
          mPerIDForCurrentUser.remove(netID);
  
          Iterator<Map.Entry<ScanResultMatchInfo, WifiConfiguration>> scanResultMatchInfoEntries =
                  mScanResultMatchInfoMapForCurrentUser.entrySet().iterator();
          while (scanResultMatchInfoEntries.hasNext()) {
              if (scanResultMatchInfoEntries.next().getValue().networkId == netID) {
                  scanResultMatchInfoEntries.remove();
                  break;
              }
          }
          return config;
      }
  
      public void clear() {
          mPerID.clear();
          mPerIDForCurrentUser.clear();
          mScanResultMatchInfoMapForCurrentUser.clear();
      }
  
      /**
       * Sets the new foreground user ID.
       *
       * @param userId the id of the new foreground user
       */
      public void setNewUser(int userId) {
          mCurrentUserId = userId;
      }
  
      // RO methods:
      public WifiConfiguration getForAllUsers(int netid) {
          return mPerID.get(netid);
      }
  
      public WifiConfiguration getForCurrentUser(int netid) {
          return mPerIDForCurrentUser.get(netid);
      }
  
      public int sizeForAllUsers() {
          return mPerID.size();
      }
  
      public int sizeForCurrentUser() {
          return mPerIDForCurrentUser.size();
      }
  
      public WifiConfiguration getByConfigKeyForCurrentUser(String key) {
          if (key == null) {
              return null;
          }
          for (WifiConfiguration config : mPerIDForCurrentUser.values()) {
              if (config.configKey().equals(key)) {
                  return config;
              }
          }
          return null;
      }
  
      /**
       * Retrieves the |WifiConfiguration| object matching the provided |scanResult| from the internal
       * map.
       * Essentially checks if network config and scan result have the same SSID and encryption type.
       */
      public WifiConfiguration getByScanResultForCurrentUser(ScanResult scanResult) {
          return mScanResultMatchInfoMapForCurrentUser.get(
                  ScanResultMatchInfo.fromScanResult(scanResult));
      }
  
      public Collection<WifiConfiguration> valuesForAllUsers() {
          return mPerID.values();
      }
  
      public Collection<WifiConfiguration> valuesForCurrentUser() {
          return mPerIDForCurrentUser.values();
      }
  }
  