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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 MAPNIK_CSV_DATASOURCE_HPP
#define MAPNIK_CSV_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/value/types.hpp>
#include <mapnik/datasource_plugin.hpp>
#include "csv_utils.hpp"
#include <mapnik/warning.hpp>
MAPNIK_DISABLE_WARNING_PUSH
#include <mapnik/warning_ignore.hpp>
#include <boost/version.hpp>
#include <boost/geometry/strategies/cartesian/disjoint_box_box.hpp>
#include <boost/geometry/index/rtree.hpp>
MAPNIK_DISABLE_WARNING_POP
// stl
#include <iosfwd>
#include <string>
template<std::size_t Max, std::size_t Min>
struct csv_linear : boost::geometry::index::linear<Max, Min>
{};
namespace boost {
namespace geometry {
namespace index {
namespace detail {
namespace rtree {
template<std::size_t Max, std::size_t Min>
struct options_type<csv_linear<Max, Min>>
{
using type = options<csv_linear<Max, Min>,
insert_default_tag,
choose_by_content_diff_tag,
split_default_tag,
linear_tag,
#if BOOST_VERSION >= 105700
node_variant_static_tag>;
#else
node_s_mem_static_tag>;
#endif
};
} // namespace rtree
} // namespace detail
} // namespace index
} // namespace geometry
} // namespace boost
DATASOURCE_PLUGIN_DEF(csv_datasource_plugin, csv);
class csv_datasource : public mapnik::datasource,
private csv_utils::csv_file_parser
{
public:
using box_type = mapnik::box2d<double>;
using item_type = std::pair<box_type, std::pair<std::uint64_t, std::uint64_t>>;
using spatial_index_type = boost::geometry::index::rtree<item_type, csv_linear<16, 4>>;
csv_datasource(mapnik::parameters const& params);
virtual ~csv_datasource();
mapnik::datasource::datasource_t type() const override;
static char const* name();
mapnik::featureset_ptr features(mapnik::query const& q) const override;
mapnik::featureset_ptr features_at_point(mapnik::coord2d const& pt, double tol = 0) const override;
mapnik::box2d<double> envelope() const override;
mapnik::layer_descriptor get_descriptor() const override;
std::optional<mapnik::datasource_geometry_t> get_geometry_type() const override;
private:
void parse_csv(std::istream&);
virtual void add_feature(mapnik::value_integer index, mapnik::csv_line const& values) override;
std::optional<mapnik::datasource_geometry_t> get_geometry_type_impl(std::istream&) const;
mapnik::layer_descriptor desc_;
std::string filename_;
std::string inline_string_;
mapnik::context_ptr ctx_;
std::unique_ptr<spatial_index_type> tree_;
};
#endif // MAPNIK_CSV_DATASOURCE_HPP
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