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/*****************************************************************************
*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2025 Artem Pavlenko
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*****************************************************************************/
#ifndef VECTOR_TILES_FEATURESET_HPP
#define VECTOR_TILES_FEATURESET_HPP
#include <memory>
// mapnik
#include <mapnik/feature.hpp>
#include <mapnik/datasource.hpp>
#include "xyz_tiles.hpp"
#include "mvt_io.hpp"
class vector_tiles_featureset : public mapnik::Featureset
{
public:
vector_tiles_featureset(std::string const& tiles_location,
mapnik::context_ptr const& ctx,
int zoom,
int xmin,
int xmax,
int ymin,
int ymax,
mapnik::box2d<double> const& extent,
std::string const& layer,
std::unordered_map<std::string, std::string>& tiles_cache,
std::size_t max_threads,
std::size_t datasource_hash);
virtual ~vector_tiles_featureset();
mapnik::feature_ptr next();
private:
mapnik::feature_ptr next_feature();
bool valid() const;
std::string tiles_location_;
mapnik::context_ptr context_;
boost::asio::io_context ioc_;
#if defined(MAPNIK_HAS_OPENSSL)
boost::asio::ssl::context ssl_ctx_{boost::asio::ssl::context::tlsv12_client};
#endif
int zoom_;
int xmin_;
int xmax_;
int ymin_;
int ymax_;
mapnik::box2d<double> extent_;
std::string const layer_;
std::unique_ptr<mvt_io> vector_tile_;
std::unordered_map<std::string, std::string>& tiles_cache_;
std::size_t const QUEUE_SIZE_;
queue_type queue_;
std::vector<std::thread> workers_;
std::vector<zxy> targets_;
std::string host_;
std::string port_;
tiles_stash stash_;
std::size_t num_tiles_{0};
std::size_t consumed_count_{0};
std::size_t max_threads_;
std::size_t datasource_hash_;
bool next_tile();
bool first_ = true;
bool ssl_ = false;
bool local_file_ = true;
std::atomic<bool> done_ = false;
};
#endif // VECTOR_TILES_FEATURESET_HPP
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