/*
 *
 * Copyright 2015 gRPC 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 GRPCPP_IMPL_CODEGEN_METADATA_MAP_H
#define GRPCPP_IMPL_CODEGEN_METADATA_MAP_H

#include <grpcpp/impl/codegen/slice.h>

namespace grpc {

namespace internal {
class MetadataMap {
 public:
  MetadataMap() { memset(&arr_, 0, sizeof(arr_)); }

  ~MetadataMap() {
    g_core_codegen_interface->grpc_metadata_array_destroy(&arr_);
  }

  void FillMap() {
    for (size_t i = 0; i < arr_.count; i++) {
      // TODO(yangg) handle duplicates?
      map_.insert(std::pair<grpc::string_ref, grpc::string_ref>(
          StringRefFromSlice(&arr_.metadata[i].key),
          StringRefFromSlice(&arr_.metadata[i].value)));
    }
  }

  std::multimap<grpc::string_ref, grpc::string_ref>* map() { return &map_; }
  const std::multimap<grpc::string_ref, grpc::string_ref>* map() const {
    return &map_;
  }
  grpc_metadata_array* arr() { return &arr_; }

 private:
  grpc_metadata_array arr_;
  std::multimap<grpc::string_ref, grpc::string_ref> map_;
};
}  // namespace internal

}  // namespace grpc

#endif  // GRPCPP_IMPL_CODEGEN_METADATA_MAP_H