created config class

1 files changed, 64 insertions, 0 deletions

diff --git a/src/config.hpp b/src/config.hpp
new file mode 100644
index 0000000..a57a5db
--- /dev/null
+++ b/src/config.hpp
@@ -0,0 +1,64 @@
+/**
+ * @file config.hpp
+ * 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/>.
+ */
+
+#ifndef CONFIG_HPP_
+#define CONFIG_HPP_
+
+#include <map>
+#include <optional>
+#include <string>
+#include <variant>
+
+class Config
+{
+private:
+    static constexpr const char *fileName = "settings.json";
+    std::map<std::string, std::variant<int, double, std::string>> values;
+
+public:
+    template<typename T>
+    std::optional<T> get(const std::string& name)
+    {
+        if (values.count(name) != 0) {
+            if (auto value = std::get_if<T>(&values[name]); value != nullptr)
+                return *value;
+        }
+    
+        return {};
+    }
+
+    template<typename T>
+    void set(const std::string& name, T val)
+    {
+        values[name] = val;
+    }
+
+    template<typename T>
+    void add(const std::string& name)
+    {
+        values[name] = T();
+    }
+
+    void save(void) const;
+    void load(void);
+};
+
+#endif // CONFIG_HPP_
+