Preliminary settings work

src/frontend/JSONUtils.hpp

@@ -0,0 +1,37 @@
+#pragma once
+#include <nlohmann/json.hpp>
+#include <filesystem>
+#include <fstream>
+
+namespace fs = std::filesystem;
+
+static inline nlohmann::json JSONOpenOrCreate(const std::string& path) {
+  auto fileExists = fs::exists(path);
+  
+  if (fileExists) {
+    auto file = std::fstream(path, std::fstream::in | std::fstream::out);
+    auto json = nlohmann::json::parse(file);
+    file.close();
+    return json;
+  } else {
+    auto file = std::fstream(path, std::fstream::in | std::fstream::out | std::fstream::trunc);
+    nlohmann::json json;
+    json["audio"]["volume"] = 0.5;
+    json["cpu"]["type"] = std::string("interpreter");
+
+    file << json;
+    file.close();
+
+    return json;
+  }
+}
+
+template <typename T>
+static inline void JSONSetField(nlohmann::json& json, const std::string& field1, const std::string& field2, const T& value) {
+  json[field1][field2] = value;
+}
+
+template <typename T>
+static inline const T& JSONGetField(nlohmann::json& json, const std::string& field1, const std::string& field2) {
+  return json[field1][field2];
+}