data_source_status_base.hpp

#include <chrono>
#include <optional>
 
#include <launchdarkly/data_sources/data_source_status_error_info.hpp>
#include <launchdarkly/data_sources/data_source_status_error_kind.hpp>
 
// Common is included in the namespace to disambiguate from client/server
// for backward compatibility.
namespace launchdarkly::common::data_sources {
 
template <typename TDataSourceState>
class DataSourceStatusBase {
   public:
    using ErrorKind = DataSourceStatusErrorKind;
    using ErrorInfo = DataSourceStatusErrorInfo;
    using DateTime = std::chrono::time_point<std::chrono::system_clock>;
    using DataSourceState = TDataSourceState;
 
    [[nodiscard]] DataSourceState State() const { return state_; }
 
    [[nodiscard]] DateTime StateSince() const { return state_since_; }
 
    [[nodiscard]] std::optional<ErrorInfo> LastError() const {
        return last_error_;
    }
 
    DataSourceStatusBase(DataSourceState state,
                         DateTime state_since,
                         std::optional<ErrorInfo> last_error)
        : state_(state),
          state_since_(state_since),
          last_error_(std::move(last_error)) {}
 
    ~DataSourceStatusBase() = default;
    DataSourceStatusBase(DataSourceStatusBase const& item) = default;
    DataSourceStatusBase(DataSourceStatusBase&& item) noexcept = default;
    DataSourceStatusBase& operator=(DataSourceStatusBase const&) = delete;
    DataSourceStatusBase& operator=(DataSourceStatusBase&&) = delete;
 
   private:
    DataSourceState state_;
    DateTime state_since_;
    std::optional<ErrorInfo> last_error_;
};
 
}  // namespace launchdarkly::common::data_sources