bson_builder.hpp

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#pragma once
 
/// @file userver/formats/bson/bson_builder.hpp
/// @brief Internal helpers for inline document build
 
#include <chrono>
#include <cstddef>
#include <string_view>
 
#include <userver/compiler/select.hpp>
#include <userver/formats/bson/types.hpp>
#include <userver/formats/bson/value.hpp>
#include <userver/utils/fast_pimpl.hpp>
 
USERVER_NAMESPACE_BEGIN
 
namespace formats::bson::impl {
 
class MutableBson;
 
class BsonBuilder {
 public:
  BsonBuilder();
  explicit BsonBuilder(const ValueImpl&);
  ~BsonBuilder();
 
  BsonBuilder(const BsonBuilder&);
  BsonBuilder(BsonBuilder&&) noexcept;
  BsonBuilder& operator=(const BsonBuilder&);
  BsonBuilder& operator=(BsonBuilder&&) noexcept;
 
  BsonBuilder& Append(std::string_view key, std::nullptr_t);
  BsonBuilder& Append(std::string_view key, bool);
  BsonBuilder& Append(std::string_view key, int);
  BsonBuilder& Append(std::string_view key, unsigned int);
  BsonBuilder& Append(std::string_view key, long);
  BsonBuilder& Append(std::string_view key, unsigned long);
  BsonBuilder& Append(std::string_view key, long long);
  BsonBuilder& Append(std::string_view key, unsigned long long);
  BsonBuilder& Append(std::string_view key, double);
  BsonBuilder& Append(std::string_view key, const char*);
  BsonBuilder& Append(std::string_view key, std::string_view);
  BsonBuilder& Append(std::string_view key,
                      std::chrono::system_clock::time_point);
  BsonBuilder& Append(std::string_view key, const Oid&);
  BsonBuilder& Append(std::string_view key, const Binary&);
  BsonBuilder& Append(std::string_view key, const Decimal128&);
  BsonBuilder& Append(std::string_view key, MinKey);
  BsonBuilder& Append(std::string_view key, MaxKey);
  BsonBuilder& Append(std::string_view key, const Timestamp&);
 
  BsonBuilder& Append(std::string_view key, const Value&);
 
  BsonBuilder& Append(std::string_view key, const bson_t*);
 
  const bson_t* Get() const;
  bson_t* Get();
 
  BsonHolder Extract();
 
 private:
  void AppendInto(bson_t*, std::string_view key, const ValueImpl&);
 
  static constexpr std::size_t kSize = compiler::SelectSize()  //
                                           .For64Bit(8)
                                           .For32Bit(4);
  static constexpr std::size_t kAlignment = alignof(void*);
  utils::FastPimpl<MutableBson, kSize, kAlignment, utils::kStrictMatch> bson_;
};
 
}  // namespace formats::bson::impl
 
USERVER_NAMESPACE_END