Move repetetive code to helper class

src/libYarr/ScanHelper.cpp

+#include "ScanHelper.h"
+
+#include <iostream>
+#include <fstream>
+#include <exception>
+
+namespace ScanHelper {
+    json openJsonFile(std::string filepath) {
+        std::ifstream file(filepath);
+        if (!file) {
+            throw std::runtime_error("could not open file");
+        }
+        json j;
+        try {
+            j = json::parse(file);
+        } catch (json::parse_error &e) {
+            throw std::runtime_error(e.what());
+        }
+        return j;
+    }
+}

src/libYarr/include/ScanHelper.h

+#ifndef SCANHELPER_H
+#define SCANHELPER_H
+
+// #################################
+// # Author: Timon Heim
+// # Email: timon.heim at cern.ch
+// # Project: Yarr
+// # Description: Class managing scans
+// # Comment: Old scanConsole in a class
+// ################################
+
+#include <string>
+
+#include "json.hpp"
+
+using json=nlohmann::basic_json<std::map, std::vector, std::string, bool, std::int32_t, std::uint32_t, float>;
+
+namespace ScanHelper {
+        json openJsonFile(std::string filepath);
+        void loadController(json &j);
+        void loadConnectivity(json &j);
+}
+#endif