Minor cleanup, reducing includes

src/libs/database/impl/IdType.cpp

@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2021 Emeric Poupon
+ *
+ * This file is part of LMS.
+ *
+ * LMS 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.
+ *
+ * LMS 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 LMS.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "database/IdType.hpp"
+
+#include <cassert>
+#include <type_traits>
+
+#include <Wt/Dbo/ptr.h>
+
+namespace lms::db
+{
+    static_assert(std::is_same_v<IdType::ValueType, Wt::Dbo::dbo_default_traits::IdType>);
+
+    IdType::IdType()
+        : _id{ Wt::Dbo::dbo_default_traits::invalidId() }
+    {
+    }
+
+    IdType::IdType(ValueType id)
+        : _id{ id }
+    {
+    }
+
+    bool IdType::isValid() const
+    {
+        return _id != Wt::Dbo::dbo_default_traits::invalidId();
+    }
+
+    std::string IdType::toString() const
+    {
+        assert(isValid());
+        return std::to_string(_id);
+    }
+
+} // namespace lms::db