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#include <mbgl/style/conversion/layer.hpp>
#include <mbgl/style/conversion/constant.hpp>
#include <mbgl/style/conversion/filter.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/fill_extrusion_layer.hpp>
#include <mbgl/style/layers/heatmap_layer.hpp>
#include <mbgl/style/layers/hillshade_layer.hpp>
#include <mbgl/style/layers/line_layer.hpp>
#include <mbgl/style/layers/raster_layer.hpp>
#include <mbgl/style/layers/symbol_layer.hpp>
namespace mbgl {
namespace style {
namespace conversion {
optional<Error> setPaintProperties(Layer& layer, const Convertible& value) {
auto paintValue = objectMember(value, "paint");
if (!paintValue) {
return nullopt;
}
if (!isObject(*paintValue)) {
return { { "paint must be an object" } };
}
return eachMember(*paintValue, [&] (const std::string& k, const Convertible& v) {
return layer.setPaintProperty(k, v);
});
}
template <class LayerType>
optional<std::unique_ptr<Layer>> convertVectorLayer(const std::string& id, const Convertible& value, Error& error) {
auto sourceValue = objectMember(value, "source");
if (!sourceValue) {
error.message = "layer must have a source";
return nullopt;
}
optional<std::string> source = toString(*sourceValue);
if (!source) {
error.message = "layer source must be a string";
return nullopt;
}
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) {
error.message = "layer source-layer must be a string";
return nullopt;
}
layer->setSourceLayer(*sourceLayer);
}
auto filterValue = objectMember(value, "filter");
if (filterValue) {
optional<Filter> filter = convert<Filter>(*filterValue, error);
if (!filter) {
return nullopt;
}
layer->setFilter(*filter);
}
return { std::move(layer) };
}
static optional<std::unique_ptr<Layer>> convertRasterLayer(const std::string& id, const Convertible& value, Error& error) {
auto sourceValue = objectMember(value, "source");
if (!sourceValue) {
error.message = "layer must have a source";
return nullopt;
}
optional<std::string> source = toString(*sourceValue);
if (!source) {
error.message = "layer source must be a string";
return nullopt;
}
return { std::make_unique<RasterLayer>(id, *source) };
}
static optional<std::unique_ptr<Layer>> convertHillshadeLayer(const std::string& id, const Convertible& value, Error& error) {
auto sourceValue = objectMember(value, "source");
if (!sourceValue) {
error.message = "layer must have a source";
return nullopt;
}
optional<std::string> source = toString(*sourceValue);
if (!source) {
error.message = "layer source must be a string";
return nullopt;
}
return { std::make_unique<HillshadeLayer>(id, *source) };
}
static optional<std::unique_ptr<Layer>> convertBackgroundLayer(const std::string& id, const Convertible&, Error&) {
return { std::make_unique<BackgroundLayer>(id) };
}
optional<std::unique_ptr<Layer>> Converter<std::unique_ptr<Layer>>::operator()(const Convertible& value, Error& error) const {
if (!isObject(value)) {
error.message = "layer must be an object";
return nullopt;
}
auto idValue = objectMember(value, "id");
if (!idValue) {
error.message = "layer must have an id";
return nullopt;
}
optional<std::string> id = toString(*idValue);
if (!id) {
error.message = "layer id must be a string";
return nullopt;
}
auto typeValue = objectMember(value, "type");
if (!typeValue) {
error.message = "layer must have a type";
return nullopt;
}
optional<std::string> type = toString(*typeValue);
if (!type) {
error.message = "layer type must be a string";
return nullopt;
}
optional<std::unique_ptr<Layer>> converted;
if (*type == "fill") {
converted = convertVectorLayer<FillLayer>(*id, value, error);
} else if (*type == "fill-extrusion") {
converted = convertVectorLayer<FillExtrusionLayer>(*id, value, error);
} else if (*type == "line") {
converted = convertVectorLayer<LineLayer>(*id, value, error);
} else if (*type == "circle") {
converted = convertVectorLayer<CircleLayer>(*id, value, error);
} else if (*type == "symbol") {
converted = convertVectorLayer<SymbolLayer>(*id, value, error);
} else if (*type == "raster") {
converted = convertRasterLayer(*id, value, error);
} else if (*type == "heatmap") {
converted = convertVectorLayer<HeatmapLayer>(*id, value, error);
} else if (*type == "hillshade") {
converted = convertHillshadeLayer(*id, value, error);
} else if (*type == "background") {
converted = convertBackgroundLayer(*id, value, error);
} else {
error.message = "invalid layer type";
return nullopt;
}
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) {
error.message = "minzoom must be numeric";
return nullopt;
}
layer->setMinZoom(*minzoom);
}
auto maxzoomValue = objectMember(value, "maxzoom");
if (maxzoomValue) {
optional<float> maxzoom = toNumber(*maxzoomValue);
if (!maxzoom) {
error.message = "maxzoom must be numeric";
return nullopt;
}
layer->setMaxZoom(*maxzoom);
}
auto layoutValue = objectMember(value, "layout");
if (layoutValue) {
if (!isObject(*layoutValue)) {
error.message = "layout must be an object";
return nullopt;
}
optional<Error> error_ = eachMember(*layoutValue, [&] (const std::string& k, const Convertible& v) {
return layer->setLayoutProperty(k, v);
});
if (error_) {
error = *error_;
return nullopt;
}
}
optional<Error> error_ = setPaintProperties(*layer, value);
if (error_) {
error = *error_;
return nullopt;
}
return std::move(layer);
}
} // namespace conversion
} // namespace style
} // namespace mbgl
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