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#pragma once
#include <mbgl/style/layer.hpp>
#include <mbgl/style/layers/background_layer.hpp>
#include <mbgl/style/layers/circle_layer.hpp>
#include <mbgl/style/layers/fill_layer.hpp>
#include <mbgl/style/layers/line_layer.hpp>
#include <mbgl/style/layers/raster_layer.hpp>
#include <mbgl/style/layers/symbol_layer.hpp>
#include <mbgl/style/conversion.hpp>
#include <mbgl/style/conversion/constant.hpp>
#include <mbgl/style/conversion/filter.hpp>
#include <mbgl/style/conversion/make_property_setters.hpp>
namespace mbgl {
namespace style {
namespace conversion {
template <class V>
optional<Error> setLayoutProperty(Layer& layer, const std::string& name, const V& value) {
static const auto setters = makeLayoutPropertySetters<V>();
auto it = setters.find(name);
if (it == setters.end()) {
return Error { "property not found" };
}
return it->second(layer, value);
}
template <class V>
optional<Error> setPaintProperty(Layer& layer, const std::string& name, const V& value, const optional<std::string>& klass) {
static const auto setters = makePaintPropertySetters<V>();
auto it = setters.find(name);
if (it == setters.end()) {
return Error { "property not found" };
}
return it->second(layer, value, klass);
}
template <class V>
optional<Error> setPaintProperties(Layer& layer, const V& value) {
return eachMember(value, [&] (const std::string& paintName, const V& paintValue) -> optional<Error> {
if (paintName.compare(0, 5, "paint") != 0) {
return {};
}
optional<std::string> klass;
if (paintName.compare(0, 6, "paint.") == 0) {
klass = paintName.substr(6);
}
return eachMember(paintValue, [&] (const std::string& k, const V& v) {
return setPaintProperty(layer, k, v, klass);
});
});
}
template <>
struct Converter<std::unique_ptr<Layer>> {
public:
template <class V>
Result<std::unique_ptr<Layer>> operator()(const V& value) const {
if (!isObject(value)) {
return Error { "layer must be an object" };
}
auto idValue = objectMember(value, "id");
if (!idValue) {
return Error { "layer must have an id" };
}
optional<std::string> id = toString(*idValue);
if (!id) {
return Error { "layer id must be a string" };
}
auto typeValue = objectMember(value, "type");
if (!typeValue) {
return Error { "layer must have a type" };
}
optional<std::string> type = toString(*typeValue);
if (!type) {
return Error { "layer type must be a string" };
}
Result<std::unique_ptr<Layer>> converted;
if (*type == "fill") {
converted = convertVectorLayer<FillLayer>(*id, value);
} else if (*type == "line") {
converted = convertVectorLayer<LineLayer>(*id, value);
} else if (*type == "circle") {
converted = convertVectorLayer<CircleLayer>(*id, value);
} else if (*type == "symbol") {
converted = convertVectorLayer<SymbolLayer>(*id, value);
} else if (*type == "raster") {
converted = convertRasterLayer(*id, value);
} else if (*type == "background") {
converted = convertBackgroundLayer(*id, value);
} else {
return Error { "invalid layer type" };
}
if (!converted) {
return converted;
}
std::unique_ptr<Layer> layer = std::move(*converted);
auto minzoomValue = objectMember(value, "minzoom");
if (minzoomValue) {
optional<float> minzoom = toNumber(*minzoomValue);
if (!minzoom) {
return Error { "minzoom must be numeric" };
}
layer->setMinZoom(*minzoom);
}
auto maxzoomValue = objectMember(value, "maxzoom");
if (maxzoomValue) {
optional<float> maxzoom = toNumber(*maxzoomValue);
if (!maxzoom) {
return Error { "maxzoom must be numeric" };
}
layer->setMaxZoom(*maxzoom);
}
auto layoutValue = objectMember(value, "layout");
if (layoutValue) {
if (!isObject(*layoutValue)) {
return Error { "layout must be an object" };
}
optional<Error> error = eachMember(*layoutValue, [&] (const std::string& k, const V& v) {
return setLayoutProperty(*layer, k, v);
});
if (error) {
return *error;
}
}
optional<Error> error = setPaintProperties(*layer, value);
if (error) {
return *error;
}
return std::move(layer);
}
private:
template <class LayerType, class V>
Result<std::unique_ptr<Layer>> convertVectorLayer(const std::string& id, const V& value) const {
auto sourceValue = objectMember(value, "source");
if (!sourceValue) {
return Error { "layer must have a source" };
}
optional<std::string> source = toString(*sourceValue);
if (!source) {
return Error { "layer source must be a string" };
}
std::unique_ptr<LayerType> layer = std::make_unique<LayerType>(id, *source);
auto sourceLayerValue = objectMember(value, "source-layer");
if (sourceLayerValue) {
optional<std::string> sourceLayer = toString(*sourceLayerValue);
if (!sourceLayer) {
return Error { "layer source-layer must be a string" };
}
layer->setSourceLayer(*sourceLayer);
}
auto filterValue = objectMember(value, "filter");
if (filterValue) {
Result<Filter> filter = convert<Filter>(*filterValue);
if (!filter) {
return filter.error();
}
layer->setFilter(*filter);
}
return std::move(layer);
}
template <class V>
Result<std::unique_ptr<Layer>> convertRasterLayer(const std::string& id, const V& value) const {
auto sourceValue = objectMember(value, "source");
if (!sourceValue) {
return Error { "layer must have a source" };
}
optional<std::string> source = toString(*sourceValue);
if (!source) {
return Error { "layer source must be a string" };
}
return std::make_unique<RasterLayer>(id, *source);
}
template <class V>
Result<std::unique_ptr<Layer>> convertBackgroundLayer(const std::string& id, const V&) const {
return std::make_unique<BackgroundLayer>(id);
}
};
} // namespace conversion
} // namespace style
} // namespace mbgl
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