+struct surface_id_to_layer {
+ int id_min = -1;
+ int id_max = -1;
+ std::string name = "";
+ int layer_id = -1;
+
+ explicit surface_id_to_layer(nlohmann::json const &j);
+
+ bool operator<(struct surface_id_to_layer const &rhs) const {
+ return this->id_max < rhs.id_max;
+ }
+};
+
+inline bool operator<(struct surface_id_to_layer const &a, int b) {
+ return a.id_max < b;
+}
+
+struct surface_id_to_layer_map {
+ typedef std::set<struct surface_id_to_layer> map_type;
+
+ map_type mapping;
+
+ std::experimental::optional<int> get_layer_for_surface(int surface_id) {
+ auto i = std::lower_bound(std::cbegin(this->mapping),
+ std::cend(this->mapping), surface_id);
+
+ if (i != this->mapping.end()) {
+ return std::experimental::optional<int>(i->layer_id);
+ }
+
+ return std::experimental::nullopt;
+ }
+};
+
+struct result<struct surface_id_to_layer_map> to_surface_id_to_layer_map(
+ nlohmann::json const &j);
+