refactor(Core/AI): factory functions cleanup (#11779)

src/server/game/AI/GameObjectAIFactory.h

@@ -0,0 +1,51 @@
+/*
+ * This file is part of the AzerothCore Project. See AUTHORS file for Copyright information
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Affero 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 Affero 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 ACORE_GAMEOBJECTAIFACTORY_H
+#define ACORE_GAMEOBJECTAIFACTORY_H
+
+#include "ObjectRegistry.h"
+#include "FactoryHolder.h"
+
+typedef FactoryHolder<GameObjectAI, GameObject> GameObjectAICreator;
+
+struct SelectableGameObjectAI : public GameObjectAICreator, public Permissible<GameObject>
+{
+    SelectableGameObjectAI(std::string const& name) : GameObjectAICreator(name), Permissible<GameObject>() { }
+};
+
+template<class REAL_GO_AI>
+struct GameObjectAIFactory : public SelectableGameObjectAI
+{
+    GameObjectAIFactory(std::string const& name) : SelectableGameObjectAI(name) { }
+
+    GameObjectAI* Create(GameObject* go) const override
+    {
+        return new REAL_GO_AI(go);
+    }
+
+    int32 Permit(GameObject const* go) const override
+    {
+        return REAL_GO_AI::Permissible(go);
+    }
+};
+
+typedef GameObjectAICreator::FactoryHolderRegistry GameObjectAIRegistry;
+
+#define sGameObjectAIRegistry GameObjectAIRegistry::instance()
+
+#endif