122 lines
3.4 KiB
C++
122 lines
3.4 KiB
C++
/*
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* Copyright (C) 2019 Emeric Poupon
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*
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* This file is part of LMS.
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*
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* LMS is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* LMS is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with LMS. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "RecommendationService.hpp"
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#include <vector>
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#include "database/Db.hpp"
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#include "database/ScanSettings.hpp"
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#include "database/Session.hpp"
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#include "ClustersEngineCreator.hpp"
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#include "FeaturesEngineCreator.hpp"
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namespace lms::recommendation
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{
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namespace
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{
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db::ScanSettings::SimilarityEngineType getSimilarityEngineType(db::Session& session)
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{
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auto transaction{ session.createReadTransaction() };
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return db::ScanSettings::get(session)->getSimilarityEngineType();
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}
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} // namespace
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std::unique_ptr<IRecommendationService> createRecommendationService(db::Db& db)
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{
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return std::make_unique<RecommendationService>(db);
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}
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RecommendationService::RecommendationService(db::Db& db)
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: _db{ db }
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{
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load();
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}
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TrackContainer RecommendationService::findSimilarTracks(db::TrackListId trackListId, std::size_t maxCount) const
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{
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TrackContainer res;
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if (!_engine)
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return res;
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return _engine->findSimilarTracksFromTrackList(trackListId, maxCount);
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}
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TrackContainer RecommendationService::findSimilarTracks(const std::vector<db::TrackId>& trackIds, std::size_t maxCount) const
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{
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TrackContainer res;
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if (!_engine)
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return res;
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return _engine->findSimilarTracks(trackIds, maxCount);
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}
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ReleaseContainer RecommendationService::getSimilarReleases(db::ReleaseId releaseId, std::size_t maxCount) const
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{
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ReleaseContainer res;
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if (!_engine)
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return res;
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return _engine->getSimilarReleases(releaseId, maxCount);
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;
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}
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ArtistContainer RecommendationService::getSimilarArtists(db::ArtistId artistId, core::EnumSet<db::TrackArtistLinkType> linkTypes, std::size_t maxCount) const
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{
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ArtistContainer res;
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if (!_engine)
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return res;
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return _engine->getSimilarArtists(artistId, linkTypes, maxCount);
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return res;
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}
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void RecommendationService::load()
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{
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using namespace db;
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switch (getSimilarityEngineType(_db.getTLSSession()))
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{
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case ScanSettings::SimilarityEngineType::Clusters:
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if (_engineType != EngineType::Clusters)
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{
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_engineType = EngineType::Clusters;
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_engine = createClustersEngine(_db);
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}
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break;
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case ScanSettings::SimilarityEngineType::Features:
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case ScanSettings::SimilarityEngineType::None:
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_engineType.reset();
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_engine.reset();
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break;
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}
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if (_engine)
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_engine->load(false);
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}
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} // namespace lms::recommendation
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