/*
 * Copyright 2018 The Cartographer 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.
 */

#ifndef CARTOGRAPHER_GRPC_FRAMEWORK_TESTING_RPC_HANDLER_WRAPPER_H_
#define CARTOGRAPHER_GRPC_FRAMEWORK_TESTING_RPC_HANDLER_WRAPPER_H_

#include <functional>

namespace cartographer_grpc {
namespace framework {
namespace testing {

template <class RpcHandlerType>
class RpcHandlerWrapper : public RpcHandlerType {
 public:
  enum RpcHandlerEvent { ON_REQUEST, ON_READS_DONE, ON_FINISH };
  using EventCallback = std::function<void(RpcHandlerEvent)>;

  RpcHandlerWrapper(EventCallback event_callback)
      : event_callback_(event_callback) {}

  void OnRequest(const typename RpcHandlerType::RequestType &request) override {
    RpcHandlerType::OnRequest(request);
    event_callback_(ON_REQUEST);
  }

  void OnReadsDone() override {
    RpcHandlerType::OnReadsDone();
    event_callback_(ON_READS_DONE);
  }

  void OnFinish() override {
    RpcHandlerType::OnFinish();
    event_callback_(ON_FINISH);
  }

 private:
  EventCallback event_callback_;
};

}  // namespace testing
}  // namespace framework
}  // namespace cartographer_grpc

#endif  // CARTOGRAPHER_GRPC_FRAMEWORK_TESTING_RPC_HANDLER_WRAPPER_H_