text: // Copyright 2018, Bosch Software Innovations GmbH.
  //
  // 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 ROSBAG2_STORAGE__BAG_METADATA_HPP_
  #define ROSBAG2_STORAGE__BAG_METADATA_HPP_
  
  #include <chrono>
  #include <string>
  #include <vector>
  #include <utility>
  
  #include "rosbag2_storage/topic_metadata.hpp"
  
  namespace rosbag2_storage
  {
  
  struct TopicInformation
  {
    TopicMetadata topic_metadata;
    size_t message_count;
  };
  
  struct FileInformation
  {
    std::string path;
    std::chrono::time_point<std::chrono::high_resolution_clock> starting_time;
    std::chrono::nanoseconds duration;
    size_t message_count;
  };
  
  struct BagMetadata
  {
    int version = 5;  // upgrade this number when changing the content of the struct
    uint64_t bag_size = 0;  // Will not be serialized
    std::string storage_identifier;
    std::vector<std::string> relative_file_paths;
    std::vector<FileInformation> files;
    std::chrono::nanoseconds duration;
    std::chrono::time_point<std::chrono::high_resolution_clock> starting_time;
    uint64_t message_count;
    std::vector<TopicInformation> topics_with_message_count;
    std::string compression_format;
    std::string compression_mode;
  };
  
  }  // namespace rosbag2_storage
  
  #endif  // ROSBAG2_STORAGE__BAG_METADATA_HPP_
  