created config class

1 files changed, 60 insertions, 0 deletions

diff --git a/src/config.cpp b/src/config.cpp
new file mode 100644
index 0000000..4f5847c
--- /dev/null
+++ b/src/config.cpp
@@ -0,0 +1,60 @@
+/**
+ * @file config.cpp
+ * Manages name-value pairs for configuration options.
+ *
+ * Copyright (C) 2019 Clyne Sullivan
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.hpp"
+
+#include <cereal/cereal.hpp>
+#include <cereal/archives/json.hpp>
+#include <fstream>
+
+void Config::save(void) const
+{
+    if (std::ofstream file (fileName); file.good()) {
+        cereal::JSONOutputArchive archive (file);
+
+        for (auto& nvp : values) {
+            if (std::holds_alternative<int>(nvp.second)) {
+                archive(cereal::make_nvp(nvp.first, std::get<int>(nvp.second)));
+            } else if (std::holds_alternative<double>(nvp.second)) {
+                archive(cereal::make_nvp(nvp.first, std::get<double>(nvp.second)));
+            } else {
+                archive(cereal::make_nvp(nvp.first, std::get<std::string>(nvp.second)));
+            }
+        }
+    }
+}
+
+void Config::load(void)
+{
+    if (std::ifstream file (fileName); file.good()) {
+        cereal::JSONInputArchive archive (file);
+
+        for (auto& nvp : values) {
+            if (std::holds_alternative<int>(nvp.second)) {
+                archive(cereal::make_nvp(nvp.first, std::get<int>(nvp.second)));
+            } else if (std::holds_alternative<double>(nvp.second)) {
+                archive(cereal::make_nvp(nvp.first, std::get<double>(nvp.second)));
+            } else {
+                archive(cereal::make_nvp(nvp.first, std::get<std::string>(nvp.second)));
+            }
+        }
+    }
+}
+