Uuid.hpp

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#pragma once
 
#include <array>
#include <cstdint>
#include <string>
 
namespace smgl
{
 
class Uuid
{
public:
    using Byte = std::uint8_t;
 
    Uuid() = default;
 
    explicit operator bool() const;
    auto operator==(const Uuid& rhs) const -> bool;
    auto operator!=(const Uuid& rhs) const -> bool;
 
    void reset();
    auto is_nil() const -> bool;
 
    auto string() const -> std::string;
 
    auto short_string() const -> std::string;
 
    static auto FromString(const std::string& str) -> Uuid;
 
    static auto Uuid4() -> Uuid;
 
private:
    std::array<Byte, 16> buffer_{};
};
 
class UniquelyIdentifiable
{
public:
    auto uuid() const -> Uuid;
    void setUuid(const Uuid& uuid);
 
protected:
    UniquelyIdentifiable() = default;
    Uuid uuid_{Uuid::Uuid4()};
};
 
}  // namespace smgl
 
namespace std
{
template <>
struct hash<smgl::Uuid> {
    auto operator()(smgl::Uuid const& u) const noexcept -> std::size_t
    {
        return std::hash<std::string>{}(u.string());
    }
};
}  // namespace std