[core] Introduce the ResourceTransform

Wrapper for transforming URLs on the OnlineFileSource.

1 files changed, 26 insertions, 0 deletions

diff --git a/include/mbgl/storage/resource_transform.hpp b/include/mbgl/storage/resource_transform.hpp
new file mode 100644
index 0000000000..738c497176
--- /dev/null
+++ b/include/mbgl/storage/resource_transform.hpp
@@ -0,0 +1,26 @@
+#pragma once
+
+#include <mbgl/actor/actor_ref.hpp>
+#include <mbgl/storage/resource.hpp>
+
+#include <functional>
+#include <string>
+
+namespace mbgl {
+
+class Mailbox;
+
+class ResourceTransform {
+public:
+    using TransformCallback = std::function<std::string(Resource::Kind kind, const std::string&& url)>;
+    using FinishedCallback = std::function<void(const std::string&&)>;
+
+    ResourceTransform(ActorRef<ResourceTransform>, TransformCallback&&);
+
+    void transform(Resource::Kind, const std::string&& url, FinishedCallback&&);
+
+private:
+    TransformCallback transformCallback;
+};
+
+} // namespace mbgl