/*
 * Copyright 2023 Yunseong Hwang
 *
 * 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.
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#ifndef API_KEY_CREDENTIALS_PLUGIN
#define API_KEY_CREDENTIALS_PLUGIN

#include <grpcpp/security/credentials.h>

class ApiKeyCredentialsPlugin : public grpc::MetadataCredentialsPlugin {
private:
  std::string m_api_key;

public:
  explicit ApiKeyCredentialsPlugin(std::string api_key)
      : m_api_key(std::move(api_key)) {}

  virtual grpc::Status GetMetadata(
      grpc::string_ref service_url, grpc::string_ref method_name,
      const grpc::AuthContext &channel_auth_context,
      std::multimap<grpc::string, grpc::string> *metadata
  ) override;
};

std::shared_ptr<grpc::CallCredentials>
ApiKeyCredentials(const std::string &api_key);

#endif // API_KEY_CREDENTIALS_PLUGIN