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#pragma once
#include <Access/Common/AccessEntityType.h>
#include <Common/typeid_cast.h>
#include <base/types.h>
#include <memory>
#include <unordered_map>
namespace DB
{
/// Access entity is a set of data which have a name and a type. Access entity control something related to the access control.
/// Entities can be stored to a file or another storage, see IAccessStorage.
struct IAccessEntity
{
IAccessEntity() = default;
IAccessEntity(const IAccessEntity &) = default;
virtual ~IAccessEntity() = default;
virtual std::shared_ptr<IAccessEntity> clone() const = 0;
virtual AccessEntityType getType() const = 0;
const AccessEntityTypeInfo & getTypeInfo() const { return AccessEntityTypeInfo::get(getType()); }
String formatTypeWithName() const { return getTypeInfo().formatEntityNameWithType(getName()); }
template <typename EntityClassT>
bool isTypeOf() const { return isTypeOf(EntityClassT::TYPE); }
bool isTypeOf(AccessEntityType type) const { return type == getType(); }
virtual void setName(const String & name_) { name = name_; }
const String & getName() const { return name; }
friend bool operator ==(const IAccessEntity & lhs, const IAccessEntity & rhs) { return lhs.equal(rhs); }
friend bool operator !=(const IAccessEntity & lhs, const IAccessEntity & rhs) { return !(lhs == rhs); }
struct LessByName
{
bool operator()(const IAccessEntity & lhs, const IAccessEntity & rhs) const { return (lhs.getName() < rhs.getName()); }
bool operator()(const std::shared_ptr<const IAccessEntity> & lhs, const std::shared_ptr<const IAccessEntity> & rhs) const { return operator()(*lhs, *rhs); }
};
struct LessByTypeAndName
{
bool operator()(const IAccessEntity & lhs, const IAccessEntity & rhs) const { return (lhs.getType() < rhs.getType()) || ((lhs.getType() == rhs.getType()) && (lhs.getName() < rhs.getName())); }
bool operator()(const std::shared_ptr<const IAccessEntity> & lhs, const std::shared_ptr<const IAccessEntity> & rhs) const { return operator()(*lhs, *rhs); }
};
/// Finds all dependencies.
virtual std::vector<UUID> findDependencies() const { return {}; }
/// Replaces dependencies according to a specified map.
virtual void replaceDependencies(const std::unordered_map<UUID, UUID> & /* old_to_new_ids */) {}
/// Whether this access entity should be written to a backup.
virtual bool isBackupAllowed() const { return false; }
protected:
String name;
virtual bool equal(const IAccessEntity & other) const;
/// Helper function to define clone() in the derived classes.
template <typename EntityClassT>
std::shared_ptr<IAccessEntity> cloneImpl() const
{
return std::make_shared<EntityClassT>(typeid_cast<const EntityClassT &>(*this));
}
};
using AccessEntityPtr = std::shared_ptr<const IAccessEntity>;
}
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