95 lines
2.9 KiB
C++
95 lines
2.9 KiB
C++
/*
|
|
* Copyright (C) 2019 Emeric Poupon
|
|
*
|
|
* This file is part of LMS.
|
|
*
|
|
* LMS is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* LMS is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with LMS. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <map>
|
|
#include <shared_mutex>
|
|
#include <vector>
|
|
|
|
#include <Wt/WIOService.h>
|
|
|
|
#include "database/Session.hpp"
|
|
#include "recommendation/IEngine.hpp"
|
|
#include "recommendation/IClassifier.hpp"
|
|
|
|
namespace Recommendation
|
|
{
|
|
class Engine : public IEngine
|
|
{
|
|
public:
|
|
Engine(Database::Db& db);
|
|
|
|
private:
|
|
|
|
void start() override;
|
|
void stop() override;
|
|
|
|
void requestReload() override;
|
|
Wt::Signal<>& reloaded() override { return _sigReloaded; }
|
|
|
|
std::vector<Database::IdType> getSimilarTracksFromTrackList(Database::Session& session, Database::IdType tracklistId, std::size_t maxCount) override;
|
|
std::vector<Database::IdType> getSimilarTracks(Database::Session& session, const std::unordered_set<Database::IdType>& tracksId, std::size_t maxCount) override;
|
|
std::vector<Database::IdType> getSimilarReleases(Database::Session& session, Database::IdType releaseId, std::size_t maxCount) override;
|
|
std::vector<Database::IdType> getSimilarArtists(Database::Session& session, Database::IdType artistId, std::size_t maxCount) override;
|
|
|
|
|
|
void requestReloadInternal(bool databaseChanged);
|
|
void reload(bool databaseChanged);
|
|
|
|
void setClassifierPriorities(std::initializer_list<std::string_view> classifierNames);
|
|
void clearClassifiers();
|
|
void initAndAddClassifier(std::unique_ptr<IClassifier> classifier, bool databaseChanged);
|
|
|
|
class PendingClassifierHandler
|
|
{
|
|
public:
|
|
PendingClassifierHandler(Engine& engine, IClassifier& classifier) : _engine {engine}, _classifier {classifier}
|
|
{
|
|
_engine.addPendingClassifier(_classifier);
|
|
}
|
|
|
|
~PendingClassifierHandler()
|
|
{
|
|
_engine.removePendingClassifier(_classifier);
|
|
}
|
|
|
|
private:
|
|
Engine& _engine;
|
|
IClassifier& _classifier;
|
|
};
|
|
|
|
void cancelPendingClassifiers();
|
|
void addPendingClassifier(IClassifier& classifier);
|
|
void removePendingClassifier(IClassifier& classifier);
|
|
|
|
bool _running {};
|
|
Wt::WIOService _ioService;
|
|
Database::Session _dbSession;
|
|
Wt::Signal<> _sigReloaded;
|
|
|
|
std::shared_mutex _classifiersMutex;
|
|
std::map<std::string, std::unique_ptr<IClassifier>> _classifiers;
|
|
std::vector<std::string> _classifierPriorities; // ordered by priority
|
|
std::unordered_set<IClassifier*> _pendingClassifiers;
|
|
};
|
|
|
|
} // ns Recommendation
|
|
|