1 files changed, 48 insertions, 0 deletions
diff --git a/platform/darwin/src/MGLShapeCollection.mm b/platform/darwin/src/MGLShapeCollection.mm
new file mode 100644
index 0000000000..e317a443fe
--- /dev/null
+++ b/platform/darwin/src/MGLShapeCollection.mm
@@ -0,0 +1,48 @@
+#import "MGLShapeCollection.h"
+
+#import "MGLShape_Private.h"
+
+#import <mbgl/style/conversion/geojson.hpp>
+
+@implementation MGLShapeCollection
+
++ (instancetype)shapeCollectionWithShapes:(NS_ARRAY_OF(MGLShape *) *)shapes {
+    return [[self alloc] initWithShapes:shapes];
+}
+
+- (instancetype)initWithShapes:(NS_ARRAY_OF(MGLShape *) *)shapes {
+    if (self = [super init]) {
+        NSAssert(shapes.count, @"Cannot create an empty shape collection");
+        _shapes = shapes.copy;
+    }
+    return self;
+}
+
+- (CLLocationCoordinate2D)coordinate {
+    return _shapes.firstObject.coordinate;
+}
+
+- (NSDictionary *)geoJSONDictionary {
+    return @{@"type": @"GeometryCollection",
+             @"geometries": [self geometryCollection]};
+}
+
+- (NSArray *)geometryCollection {
+    NSMutableArray *geometries = [[NSMutableArray alloc] initWithCapacity:self.shapes.count];
+    for (id shape in self.shapes) {
+        NSDictionary *geometry = [shape geoJSONDictionary];
+        [geometries addObject:geometry];
+    }
+    return [geometries copy];
+}
+
+- (mbgl::Geometry<double>)geometryObject {
+    mapbox::geojson::geometry_collection collection;
+    collection.reserve(self.shapes.count);
+    for (MGLShape *shape in self.shapes) {
+        collection.push_back([shape geometryObject]);
+    }
+    return collection;
+}
+
+@end