content: /*
   * Copyright (C) 2017 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.util;
  
  import android.content.Context;
  import android.content.Intent;
  import android.net.Uri;
  import android.os.Build;
  import android.os.UserHandle;
  import android.provider.Settings;
  
  /**
   * A class that manages emergency affordances and enables immediate calling to emergency services
   */
  public class EmergencyAffordanceManager {
  
      public static final boolean ENABLED = true;
  
      /**
       * Global setting override with the number to call with the emergency affordance.
       * @hide
       */
      private static final String EMERGENCY_CALL_NUMBER_SETTING = "emergency_affordance_number";
  
      /**
       * Global setting, whether the emergency affordance should be shown regardless of device state.
       * The value is a boolean (1 or 0).
       * @hide
       */
      private static final String FORCE_EMERGENCY_AFFORDANCE_SETTING = "force_emergency_affordance";
  
      private final Context mContext;
  
      public EmergencyAffordanceManager(Context context) {
          mContext = context;
      }
  
      /**
       * perform an emergency call.
       */
      public final void performEmergencyCall() {
          performEmergencyCall(mContext);
      }
  
      private static Uri getPhoneUri(Context context) {
          String number = context.getResources().getString(
                  com.android.internal.R.string.config_emergency_call_number);
          if (Build.IS_DEBUGGABLE) {
              String override = Settings.Global.getString(
                      context.getContentResolver(), EMERGENCY_CALL_NUMBER_SETTING);
              if (override != null) {
                  number = override;
              }
          }
          return Uri.fromParts("tel", number, null);
      }
  
      private static void performEmergencyCall(Context context) {
          Intent intent = new Intent(Intent.ACTION_CALL_EMERGENCY);
          intent.setData(getPhoneUri(context));
          intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
          context.startActivityAsUser(intent, UserHandle.CURRENT);
      }
  
      /**
       * @return whether emergency affordance should be active.
       */
      public boolean needsEmergencyAffordance() {
          if (!ENABLED) {
              return false;
          }
          if (forceShowing()) {
              return true;
          }
          return isEmergencyAffordanceNeeded();
      }
  
      private boolean isEmergencyAffordanceNeeded() {
          return Settings.Global.getInt(mContext.getContentResolver(),
                  Settings.Global.EMERGENCY_AFFORDANCE_NEEDED, 0) != 0;
      }
  
  
      private boolean forceShowing() {
          return Settings.Global.getInt(mContext.getContentResolver(),
                  FORCE_EMERGENCY_AFFORDANCE_SETTING, 0) != 0;
      }
  }
  