1 files changed, 63 insertions, 6 deletions

diff --git a/src/crepe/api/BehaviorScript.h b/src/crepe/api/BehaviorScript.h
index e9542c1..3909b96 100644
--- a/src/crepe/api/BehaviorScript.h
+++ b/src/crepe/api/BehaviorScript.h
@@ -1,17 +1,74 @@
 #pragma once
 
-#include "../Script.h"
+#include <memory>
+
 #include "../Component.h"
 
-namespace crepe::api {
+#include "GameObject.h"
+
+namespace crepe {
 
-class BehaviorScript : public Script, public Component {
-	// only allow ComponentManager to instantiate scripts
+class ScriptSystem;
+class ComponentManager;
+class Script;
+
+/**
+ * \brief Script component
+ *
+ * This class acts as a (component) wrapper around an instance of (a class derivatived from) \c
+ * Script. \c BehaviorScript is the only ECS component that stores member function
+ * implementations as data.
+ */
+class BehaviorScript : public Component {
+protected:
+	/**
+	 * \param id Parent \c GameObject id
+	 * \param mediator Mediator reference
+	 *
+	 * \note Calls to this constructor (should) always pass through \c GameObject::add_component,
+	 * which has an exception for this specific component type. This was done so the user does
+	 * not have to pass references used within \c Script to each \c BehaviorScript instance.
+	 */
+	BehaviorScript(game_object_id_t id, Mediator & mediator);
+	//! Only ComponentManager is allowed to instantiate BehaviorScript
 	friend class ComponentManager;
 
+public:
+	/**
+	 * \brief Set the concrete script of this component
+	 *
+	 * \tparam T Concrete script type (derived from \c crepe::Script)
+	 * \tparam Args Arguments for concrete script constructor
+	 *
+	 * \param args Arguments for concrete script constructor (forwarded using perfect forwarding)
+	 *
+	 * \returns Reference to BehaviorScript component (`*this`)
+	 */
+	template <class T, typename... Args>
+	BehaviorScript & set_script(Args &&... args);
+
+protected:
+	//! Script instance
+	std::unique_ptr<Script> script = nullptr;
+	//! ScriptSystem needs direct access to the script instance
+	friend class ScriptSystem;
+
 protected:
-	BehaviorScript();
+	//! Reference mediator
+	Mediator & mediator;
 };
 
-}
+/**
+ * \brief Add a BehaviorScript component to this game object
+ *
+ * The \c BehaviorScript class is the only exception to the ECS harmony, and requires a
+ * reference to the component manager passed to its constructor in order to function normally.
+ * This is because the \c BehaviorScript (and \c Script) classes are the only component-related
+ * classes that store implemented member functions as data.
+ */
+template <>
+BehaviorScript & GameObject::add_component<BehaviorScript>();
+
+} // namespace crepe
 
+#include "BehaviorScript.hpp"