Introduce an optional Database module

Uses litesql

src/database/database.hpp

@@ -0,0 +1,47 @@
+#ifndef DATABASE_HPP_INCLUDED
+#define DATABASE_HPP_INCLUDED
+
+#include <biboumi.h>
+#ifdef USE_DATABASE
+
+#include "biboudb.hpp"
+
+#include <memory>
+
+#include <litesql.hpp>
+
+class Database
+{
+public:
+  Database() = default;
+  ~Database() = default;
+
+  static void set_verbose(const bool val);
+
+  template<typename PersistentType>
+  static size_t count()
+  {
+    return litesql::select<PersistentType>(Database::get_db()).count();
+  }
+  /**
+   * Return the object from the db. Create it beforehand (with all default
+   * values) if it is not already present.
+   */
+  static db::IrcServerOptions get_irc_server_options(const std::string& owner,
+                                                     const std::string& server);
+
+  static void close();
+
+private:
+  static std::unique_ptr<db::BibouDB> db;
+
+  static db::BibouDB& get_db();
+
+  Database(const Database&) = delete;
+  Database(Database&&) = delete;
+  Database& operator=(const Database&) = delete;
+  Database& operator=(Database&&) = delete;
+};
+#endif /* USE_DATABASE */
+
+#endif /* DATABASE_HPP_INCLUDED */