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#include <mbgl/style/sources/geojson_source.hpp>
#include <mbgl/style/source_observer.hpp>
#include <mbgl/style/parser.hpp>
#include <mbgl/tile/geojson_tile.hpp>
#include <mbgl/storage/file_source.hpp>
#include <mapbox/geojsonvt.hpp>
#include <rapidjson/error/en.h>
#include <sstream>
namespace mbgl {
namespace style {
GeoJSONSource::GeoJSONSource(std::string id_,
std::string url_,
uint16_t tileSize_,
std::unique_ptr<Tileset>&& tileset_,
std::unique_ptr<mapbox::geojsonvt::GeoJSONVT>&& geojsonvt_)
: Source(SourceType::GeoJSON, std::move(id_), std::move(url_), tileSize_, std::move(tileset_)),
geojsonvt(std::move(geojsonvt_)) {
}
GeoJSONSource::~GeoJSONSource() = default;
void GeoJSONSource::load(FileSource& fileSource) {
if (url.empty()) {
// If the URL is empty, the GeoJSON was specified inline in the stylesheet.
loaded = true;
return;
}
if (req) {
return;
}
req = fileSource.request(Resource::source(url), [this](Response res) {
if (res.error) {
observer->onSourceError(*this, std::make_exception_ptr(std::runtime_error(res.error->message)));
} else if (res.notModified) {
return;
} else if (res.noContent) {
observer->onSourceError(*this, std::make_exception_ptr(std::runtime_error("unexpectedly empty GeoJSON")));
} else {
std::unique_ptr<Tileset> newTileset = std::make_unique<Tileset>();
rapidjson::GenericDocument<rapidjson::UTF8<>, rapidjson::CrtAllocator> d;
d.Parse<0>(res.data->c_str());
if (d.HasParseError()) {
std::stringstream message;
message << d.GetErrorOffset() << " - " << rapidjson::GetParseError_En(d.GetParseError());
observer->onSourceError(*this, std::make_exception_ptr(std::runtime_error(message.str())));
return;
}
geojsonvt = style::parseGeoJSON(d);
newTileset->maxZoom = geojsonvt->options.maxZoom;
invalidateTiles();
tileset = std::move(newTileset);
loaded = true;
observer->onSourceLoaded(*this);
}
});
}
std::unique_ptr<Tile> GeoJSONSource::createTile(const OverscaledTileID& tileID,
const UpdateParameters& parameters) {
return std::make_unique<GeoJSONTile>(tileID, id, parameters, geojsonvt.get());
}
} // namespace style
} // namespace mbgl
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