content: /*******************************************************************************
   * Software Name : RCS IMS Stack
   *
   * Copyright (C) 2010-2016 Orange.
   * Copyright (C) 2015 Sony Mobile Communications Inc.
   *
   * 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.
   *
   * NOTE: This file has been modified by Sony Mobile Communications Inc.
   * Modifications are licensed under the License.
   ******************************************************************************/
  
  package com.gsma.rcs.service.api;
  
  import com.gsma.rcs.core.Core;
  import com.gsma.rcs.core.ims.network.ImsNetworkInterface;
  import com.gsma.services.rcs.RcsServiceRegistration;
  
  /**
   * Server API utils
   * 
   * @author Jean-Marc AUFFRET
   */
  public class ServerApiUtils {
      /**
       * Test core
       */
      public static void testCore() {
          if (Core.getInstance() == null) {
              throw new ServerApiGenericException("Core is not instanciated");
          }
      }
  
      /**
       * Test IMS connection
       */
      public static void testIms() {
          if (!isImsConnected()) {
              throw new ServerApiServiceNotRegisteredException("Core is not connected to IMS");
          }
      }
  
      /**
       * Is connected to IMS
       * 
       * @return Boolean
       */
      public static boolean isImsConnected() {
          Core core = Core.getInstance();
          if (core == null) {
              return false;
          }
          ImsNetworkInterface networkInterface = core.getImsModule().getCurrentNetworkInterface();
          return networkInterface != null && networkInterface.isRegistered();
      }
  
      /**
       * Gets the reason code for IMS service registration
       * 
       * @return reason code
       */
      public static RcsServiceRegistration.ReasonCode getServiceRegistrationReasonCode() {
          Core core = Core.getInstance();
          if (core == null) {
              return RcsServiceRegistration.ReasonCode.UNSPECIFIED;
          }
          ImsNetworkInterface networkInterface = core.getImsModule().getCurrentNetworkInterface();
          if (networkInterface == null) {
              return RcsServiceRegistration.ReasonCode.UNSPECIFIED;
          }
          return networkInterface.getRegistrationReasonCode();
      }
  
      /**
       * Test IMS extension
       * 
       * @param ext Extension ID
       * @throws ServerApiPermissionDeniedException
       * @throws ServerApiServiceNotRegisteredException
       */
      public static void testImsExtension(String ext) throws ServerApiPermissionDeniedException,
              ServerApiServiceNotRegisteredException {
          if (!isImsConnected()) {
              throw new ServerApiServiceNotRegisteredException("Core is not connected to IMS");
          }
          if (!Core.getInstance().getImsModule().getExtensionManager().isExtensionAuthorized(ext)) {
              throw new ServerApiPermissionDeniedException("Extension not authorized");
          }
      }
  }
  