text: /**
   *
   *    Copyright (c) 2021 Project CHIP Authors
   *
   *    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.
   */
  /****************************************************************************
   * @file
   * @brief Routines for the Application Launcher plugin, the
   *server implementation of the Application Launcher cluster.
   *******************************************************************************
   ******************************************************************************/
  
  #include <app/CommandHandler.h>
  #include <app/common/gen/cluster-id.h>
  #include <app/common/gen/command-id.h>
  #include <app/util/af.h>
  #include <string>
  
  bool accountLoginClusterIsUserLoggedIn(std::string requestTempAccountIdentifier, std::string requestSetupPin);
  std::string accountLoginClusterGetSetupPin(std::string requestTempAccountIdentifier, chip::EndpointId endpoint);
  
  void sendResponse(chip::app::CommandHandler * command, const char * responseSetupPin)
  {
      CHIP_ERROR err                         = CHIP_NO_ERROR;
      chip::app::CommandPathParams cmdParams = { emberAfCurrentEndpoint(), /* group id */ 0, ZCL_ACCOUNT_LOGIN_CLUSTER_ID,
                                                 ZCL_GET_SETUP_PIN_RESPONSE_COMMAND_ID,
                                                 (chip::app::CommandPathFlags::kEndpointIdValid) };
      chip::TLV::TLVWriter * writer          = nullptr;
      SuccessOrExit(err = command->PrepareCommand(cmdParams));
      VerifyOrExit((writer = command->GetCommandDataElementTLVWriter()) != nullptr, err = CHIP_ERROR_INCORRECT_STATE);
      SuccessOrExit(err = writer->PutString(chip::TLV::ContextTag(0), responseSetupPin));
      SuccessOrExit(err = command->FinishCommand());
  exit:
      if (err != CHIP_NO_ERROR)
      {
          ChipLogError(Zcl, "Failed to encode GetSetupPIN command. Error:%s", chip::ErrorStr(err));
      }
  }
  
  bool emberAfAccountLoginClusterGetSetupPINCallback(chip::EndpointId endpoint, chip::app::CommandHandler * command,
                                                     uint8_t * tempAccountIdentifier)
  {
      // TODO: char is not null terminated, verify this code once #7963 gets merged.
      std::string tempAccountIdentifierString(reinterpret_cast<char *>(tempAccountIdentifier));
      std::string responseSetupPin = accountLoginClusterGetSetupPin(tempAccountIdentifierString, emberAfCurrentEndpoint());
      sendResponse(command, responseSetupPin.c_str());
      return true;
  }
  
  bool emberAfAccountLoginClusterLoginCallback(chip::EndpointId endpoint, chip::app::CommandHandler * command,
                                               uint8_t * tempAccountIdentifier, uint8_t * tempSetupPin)
  {
      // TODO: char is not null terminated, verify this code once #7963 gets merged.
      std::string tempAccountIdentifierString(reinterpret_cast<char *>(tempAccountIdentifier));
      std::string tempSetupPinString(reinterpret_cast<char *>(tempSetupPin));
      bool isLoggedIn      = accountLoginClusterIsUserLoggedIn(tempAccountIdentifierString, tempSetupPinString);
      EmberAfStatus status = isLoggedIn ? EMBER_ZCL_STATUS_SUCCESS : EMBER_ZCL_STATUS_NOT_AUTHORIZED;
      if (!isLoggedIn)
      {
          ChipLogError(Zcl, "User is not authorized.");
      }
      emberAfSendImmediateDefaultResponse(status);
      return true;
  }
  