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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 TILES_DATASOURCE_HPP_
#define TILES_DATASOURCE_HPP_
// mapnik
#include <mapnik/datasource.hpp>
#include <mapnik/params.hpp>
#include <mapnik/query.hpp>
#include <mapnik/feature.hpp>
#include <mapnik/geometry/box2d.hpp>
#include <mapnik/coord.hpp>
#include <mapnik/feature_layer_desc.hpp>
#include <mapnik/datasource_plugin.hpp>
// boost
#include <boost/json.hpp>
// stl
#include <memory>
#include <string>
#include <tuple>
#include <unordered_map>
#include <optional>
DATASOURCE_PLUGIN_DEF(tiles_datasource_plugin, tiles);
namespace mapnik {
using zxy_type = std::tuple<std::uint8_t, std::uint32_t, std::uint32_t>;
class tiles_source; // fwd decl
} // namespace mapnik
class tiles_datasource : public mapnik::datasource
{
public:
tiles_datasource(mapnik::parameters const& params);
virtual ~tiles_datasource();
mapnik::datasource::datasource_t type() const;
static char const* name();
mapnik::featureset_ptr features(mapnik::query const& q) const;
mapnik::featureset_ptr features_at_point(mapnik::coord2d const& pt, double tol = 0) const;
mapnik::box2d<double> envelope() const;
std::optional<mapnik::datasource_geometry_t> get_geometry_type() const;
mapnik::layer_descriptor get_descriptor() const;
private:
void init(mapnik::parameters const& params);
void init_metadata(boost::json::value const& json);
mapnik::context_ptr get_context_with_attributes() const;
mapnik::context_ptr get_query_context(mapnik::query const& q) const;
std::string database_path_;
std::shared_ptr<mapnik::tiles_source> source_ptr_;
std::optional<std::string> url_template_;
static std::unordered_map<std::string, std::string>& tile_cache();
public:
mapnik::box2d<double> extent_;
std::int64_t minzoom_ = 0;
std::int64_t maxzoom_ = 14;
std::size_t max_threads_ = 4;
std::optional<std::string> layer_name_;
mapnik::layer_descriptor desc_;
bool is_vector_ = false;
};
#endif // TILES_DATASOURCE_HPP_
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