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#include "node_feature.hpp"
namespace node_mbgl {
using namespace mapbox::geometry;
using Value = mbgl::Value;
using Feature = mbgl::Feature;
using Geometry = mbgl::Feature::geometry_type;
using GeometryCollection = mapbox::geometry::geometry_collection<double>;
using Properties = mbgl::Feature::property_map;
template <class T>
struct ToType {
public:
v8::Local<v8::String> operator()(const point<T>&) {
return type("Point");
}
v8::Local<v8::String> operator()(const line_string<T>&) {
return type("LineString");
}
v8::Local<v8::String> operator()(const polygon<T>&) {
return type("Polygon");
}
v8::Local<v8::String> operator()(const multi_point<T>&) {
return type("MultiPoint");
}
v8::Local<v8::String> operator()(const multi_line_string<T>&) {
return type("MultiLineString");
}
v8::Local<v8::String> operator()(const multi_polygon<T>&) {
return type("MultiPolygon");
}
v8::Local<v8::String> operator()(const geometry_collection<T>&) {
return type("GeometryCollection");
}
private:
v8::Local<v8::String> type(const char* type) {
Nan::EscapableHandleScope scope;
return scope.Escape(Nan::New(type).ToLocalChecked());
}
};
template <class T>
struct ToCoordinatesOrGeometries {
public:
// Handles line_string, polygon, multi_point, multi_line_string, multi_polygon, and geometry_collection.
template <class E>
v8::Local<v8::Object> operator()(const std::vector<E>& vector) {
Nan::EscapableHandleScope scope;
v8::Local<v8::Array> result = Nan::New<v8::Array>(vector.size());
for (std::size_t i = 0; i < vector.size(); ++i) {
Nan::Set(result, i, operator()(vector[i]));
}
return scope.Escape(result);
}
v8::Local<v8::Object> operator()(const point<T>& point) {
Nan::EscapableHandleScope scope;
v8::Local<v8::Array> result = Nan::New<v8::Array>(2);
Nan::Set(result, 0, Nan::New(point.x));
Nan::Set(result, 1, Nan::New(point.y));
return scope.Escape(result);
}
v8::Local<v8::Object> operator()(const geometry<T>& geometry) {
return toJS(geometry);
}
};
struct ToValue {
v8::Local<v8::Value> operator()(std::nullptr_t) {
Nan::EscapableHandleScope scope;
return scope.Escape(Nan::Null());
}
v8::Local<v8::Value> operator()(bool t) {
Nan::EscapableHandleScope scope;
return scope.Escape(Nan::New(t));
}
v8::Local<v8::Value> operator()(int64_t t) {
return operator()(double(t));
}
v8::Local<v8::Value> operator()(uint64_t t) {
return operator()(double(t));
}
v8::Local<v8::Value> operator()(double t) {
Nan::EscapableHandleScope scope;
return scope.Escape(Nan::New(t));
}
v8::Local<v8::Value> operator()(const std::string& t) {
Nan::EscapableHandleScope scope;
return scope.Escape(Nan::New(t).ToLocalChecked());
}
v8::Local<v8::Value> operator()(const std::vector<mbgl::Value>& array) {
Nan::EscapableHandleScope scope;
v8::Local<v8::Array> result = Nan::New<v8::Array>();
for (unsigned int i = 0; i < array.size(); i++) {
result->Set(i, toJS(array[i]));
}
return scope.Escape(result);
}
v8::Local<v8::Value> operator()(const std::unordered_map<std::string, mbgl::Value>& map) {
return toJS(map);
}
};
v8::Local<v8::Object> toJS(const Geometry& geometry) {
Nan::EscapableHandleScope scope;
v8::Local<v8::Object> result = Nan::New<v8::Object>();
Nan::Set(result,
Nan::New("type").ToLocalChecked(),
Geometry::visit(geometry, ToType<double>()));
Nan::Set(result,
Nan::New(geometry.is<GeometryCollection>() ? "geometries" : "coordinates").ToLocalChecked(),
Geometry::visit(geometry, ToCoordinatesOrGeometries<double>()));
return scope.Escape(result);
}
v8::Local<v8::Value> toJS(const Value& value) {
return Value::visit(value, ToValue());
}
v8::Local<v8::Object> toJS(const Properties& properties) {
Nan::EscapableHandleScope scope;
v8::Local<v8::Object> result = Nan::New<v8::Object>();
for (const auto& property : properties) {
Nan::Set(result, Nan::New(property.first).ToLocalChecked(), toJS(property.second));
}
return scope.Escape(result);
}
v8::Local<v8::Object> toJS(const Feature& feature) {
Nan::EscapableHandleScope scope;
v8::Local<v8::Object> result = Nan::New<v8::Object>();
Nan::Set(result, Nan::New("type").ToLocalChecked(), Nan::New("Feature").ToLocalChecked());
Nan::Set(result, Nan::New("geometry").ToLocalChecked(), toJS(feature.geometry));
Nan::Set(result, Nan::New("properties").ToLocalChecked(), toJS(feature.properties));
if (feature.id) {
Nan::Set(result, Nan::New("id").ToLocalChecked(), Nan::New(double(*feature.id)));
}
return scope.Escape(result);
}
}
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