[core] Split GeoJSONTileData and related classes into a separate header

1 files changed, 94 insertions, 0 deletions

diff --git a/src/mbgl/tile/geojson_tile_data.hpp b/src/mbgl/tile/geojson_tile_data.hpp
new file mode 100644
index 0000000000..3402c2a009
--- /dev/null
+++ b/src/mbgl/tile/geojson_tile_data.hpp
@@ -0,0 +1,94 @@
+#include <mbgl/tile/geometry_tile_data.hpp>
+
+namespace mbgl {
+
+// Implements a simple in-memory Tile type that holds GeoJSON values. A GeoJSON tile can only have
+// one layer, and it is always returned regardless of which layer is requested.
+
+class GeoJSONTileFeature : public GeometryTileFeature {
+public:
+    const mapbox::geometry::feature<int16_t>& feature;
+
+    GeoJSONTileFeature(const mapbox::geometry::feature<int16_t>& feature_)
+        : feature(feature_) {
+    }
+
+    FeatureType getType() const override  {
+        return apply_visitor(ToFeatureType(), feature.geometry);
+    }
+
+    PropertyMap getProperties() const override {
+        return feature.properties;
+    }
+
+    optional<FeatureIdentifier> getID() const override {
+        return feature.id;
+    }
+
+    GeometryCollection getGeometries() const override {
+        GeometryCollection geometry = apply_visitor(ToGeometryCollection(), feature.geometry);
+
+        // https://github.com/mapbox/geojson-vt-cpp/issues/44
+        if (getType() == FeatureType::Polygon) {
+            geometry = fixupPolygons(geometry);
+        }
+
+        return geometry;
+    }
+
+    optional<Value> getValue(const std::string& key) const override {
+        auto it = feature.properties.find(key);
+        if (it != feature.properties.end()) {
+            return optional<Value>(it->second);
+        }
+        return optional<Value>();
+    }
+};
+
+class GeoJSONTileLayer : public GeometryTileLayer {
+public:
+    GeoJSONTileLayer(std::shared_ptr<const mapbox::geometry::feature_collection<int16_t>> features_)
+        : features(std::move(features_)) {
+    }
+
+    std::size_t featureCount() const override {
+        return features->size();
+    }
+
+    std::unique_ptr<GeometryTileFeature> getFeature(std::size_t i) const override {
+        return std::make_unique<GeoJSONTileFeature>((*features)[i]);
+    }
+
+    std::string getName() const override {
+        return "";
+    }
+
+private:
+    std::shared_ptr<const mapbox::geometry::feature_collection<int16_t>> features;
+};
+
+class GeoJSONTileData : public GeometryTileData {
+public:
+    GeoJSONTileData(mapbox::geometry::feature_collection<int16_t> features_)
+        : features(std::make_shared<mapbox::geometry::feature_collection<int16_t>>(
+              std::move(features_))) {
+    }
+
+    GeoJSONTileData(std::shared_ptr<const mapbox::geometry::feature_collection<int16_t>> features_)
+        : features(std::move(features_)) {
+    }
+
+    std::unique_ptr<GeometryTileData> clone() const override {
+        return std::make_unique<GeoJSONTileData>(features);
+    }
+
+    std::unique_ptr<GeometryTileLayer> getLayer(const std::string&) const override {
+        return std::make_unique<GeoJSONTileLayer>(features);
+    }
+
+
+private:
+    std::shared_ptr<const mapbox::geometry::feature_collection<int16_t>> features;
+};
+
+} // namespace mbgl