#pragma once

#include <Poco/AutoPtr.h>
#include <Poco/Timestamp.h>
#include <Poco/Util/AbstractConfiguration.h>

#include <string>
#include <set>

namespace DB
{

/** Repository with configurations of user-defined objects (dictionaries, models).
  * Used by ExternalLoader.
  */ 
class IExternalLoaderConfigRepository
{
public:
    using Files = std::set<std::string>;
    virtual Files list(const Poco::Util::AbstractConfiguration & config, const std::string & path_key) const = 0;

    virtual bool exists(const std::string & config_file) const = 0;

    virtual Poco::Timestamp getLastModificationTime(const std::string & config_file) const = 0;

    virtual Poco::AutoPtr<Poco::Util::AbstractConfiguration> load(const std::string & config_file) const = 0;

    virtual ~IExternalLoaderConfigRepository() {}
};

}