content: /*
   * Copyright 2019 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.internal.telephony;
  
  import android.content.Context;
  import android.provider.Settings;
  import android.provider.Settings.SettingNotFoundException;
  import android.telephony.SubscriptionManager;
  import android.telephony.TelephonyManager;
  
  /**
   * Helper class that reads and writes Global.Setting values for Telephony. It will:
   * For Single SIM case, read from or write to the singleton setting value.
   * For Multi-SIM case, read from or write to the per subscription value.
   */
  public class GlobalSettingsHelper {
      /**
       * Helper function to get integer value.
       */
      public static int getInt(Context context, String settingName, int subId,
              int defaultValue) {
          settingName = getSettingName(context, settingName, subId);
          return Settings.Global.getInt(context.getContentResolver(), settingName, defaultValue);
      }
  
      /**
       * Helper function to get boolean value.
       */
      public static boolean getBoolean(Context context, String settingName, int subId,
              boolean defaultValue) {
          settingName = getSettingName(context, settingName, subId);
          return Settings.Global.getInt(context.getContentResolver(), settingName,
                  defaultValue ? 1 : 0) == 1;
      }
  
      /**
       * Helper function to get boolean value or throws SettingNotFoundException if not set.
       */
      public static boolean getBoolean(Context context, String settingName, int subId)
              throws SettingNotFoundException {
          settingName = getSettingName(context, settingName, subId);
          return Settings.Global.getInt(context.getContentResolver(), settingName) == 1;
      }
  
      /**
       * Helper function to set integer value.
       * Returns whether the value is changed or initially set.
       */
      public static boolean setInt(Context context, String settingName, int subId, int value) {
          settingName = getSettingName(context, settingName, subId);
  
          boolean needChange;
          try {
              needChange = Settings.Global.getInt(context.getContentResolver(), settingName) != value;
          } catch (SettingNotFoundException exception) {
              needChange = true;
          }
          if (needChange) Settings.Global.putInt(context.getContentResolver(), settingName, value);
  
          return needChange;
      }
  
      /**
       * Helper function to set boolean value.
       * Returns whether the value is changed or initially set.
       */
      public static boolean setBoolean(Context context, String settingName, int subId,
              boolean value) {
          return setInt(context, settingName, subId, value ? 1 : 0);
      }
  
      private static String getSettingName(Context context, String settingName, int subId) {
          // For single SIM phones, this is a per phone property. Or if it's invalid subId, we
          // read default setting.
          if (TelephonyManager.from(context).getSimCount() > 1
                  && SubscriptionManager.isValidSubscriptionId(subId)) {
              return settingName + subId;
          } else {
              return settingName;
          }
      }
  }
  