New cpp folder structure

Signed-off-by: Alexander Borsuk <me@alex.bio>

libs/routing/routing_quality/api/google/google_api.hpp

@@ -0,0 +1,37 @@
+#pragma once
+
+#include "routing/routing_quality/api/api.hpp"
+
+#include "routing/routing_quality/api/google/types.hpp"
+
+#include <cstdint>
+#include <string>
+
+namespace routing_quality
+{
+namespace api
+{
+namespace google
+{
+class GoogleApi : public RoutingApi
+{
+public:
+  explicit GoogleApi(std::string const & token);
+
+  // According to:
+  // https://developers.google.com/maps/faq#usage_apis
+  static uint32_t constexpr kMaxRPS = 50;
+  static std::string const kApiName;
+
+  // RoutingApi overrides:
+  // @{
+  Response CalculateRoute(Params const & params, int32_t startTimeZoneUTC) const override;
+  // @}
+
+private:
+  GoogleResponse MakeRequest(Params const & params, int32_t startTimeZoneUTC) const;
+  std::string GetDirectionsURL(Params const & params, int32_t startTimeZoneUTC) const;
+};
+}  // namespace mapbox
+}  // namespace api
+}  // namespace routing_quality