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//
// Created by m on 7/27/17.
//
#include <algorithm>
#include "json_helper.hpp"
#include "layers.hpp"
#include "util.hpp"
namespace wm {
surface_id_to_layer::surface_id_to_layer(nlohmann::json const &j) {
DB(j);
if (j["type"] == "range") {
this->id_min = get<int>(j["first_surface_id"]);
this->id_max = get<int>(j["last_surface_id"]);
} else {
this->id_min = this->id_max = get<int>(j["surface_id"]);
}
this->name = j["name"].get<std::string>();
this->layer_id = get<int>(j["layer_id"]);
}
struct result<struct surface_id_to_layer_map> to_surface_id_to_layer_map(
nlohmann::json const &j) {
DB(j);
try {
surface_id_to_layer_map stl{};
std::transform(
std::cbegin(j), std::cend(j),
std::inserter(stl.mapping, stl.mapping.end()),
[](nlohmann::json const &j) { return surface_id_to_layer(j); });
for (auto i : stl.mapping) {
if (i.name.empty()) {
return Err<struct surface_id_to_layer_map>(
"Found mapping w/o name");
}
if (i.layer_id == -1 || i.id_min == -1 || i.id_max == -1) {
return Err<struct surface_id_to_layer_map>(
"Found invalid/unset IDs in mapping");
}
}
return Ok(stl);
} catch (std::exception &e) {
return Err<struct surface_id_to_layer_map>(e.what());
}
}
// Helper to allow std::lower_bound with a int key only
inline bool
operator<(struct surface_id_to_layer const &a, int b) {
return a.id_max < b;
}
optional<int> surface_id_to_layer_map::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()) {
// std::less only checks for surface_id_to_layer::id_max, so check
// that we are actually inside of an interval here.
if (i->id_min <= surface_id) {
return optional<int>(i->layer_id);
}
}
return nullopt;
}
} // namespace wm
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