1 files changed, 53 insertions, 8 deletions

diff --git a/src/crepe/api/Script.h b/src/crepe/api/Script.h
index bf43a49..12ec7f1 100644
--- a/src/crepe/api/Script.h
+++ b/src/crepe/api/Script.h
@@ -3,33 +3,78 @@
 #include <vector>
 
 namespace crepe {
-class ScriptSystem;
-}
-
-namespace crepe {
 
+class ScriptSystem;
 class BehaviorScript;
+class ComponentManager;
 
+/**
+ * \brief Script interface
+ *
+ * This class is used as a base class for user-defined scripts that can be
+ * added to game objects using the \c BehaviorScript component.
+ */
 class Script {
+	//! ScriptSystem calls \c update()
 	friend class crepe::ScriptSystem;
 
 protected:
+	/**
+	 * \brief Script initialization function
+	 *
+	 * This function is called during the ScriptSystem::update() routine *before*
+	 * Script::update() if it (a) has not yet been called and (b) the \c
+	 * BehaviorScript component holding this script instance is active.
+	 */
 	virtual void init() {}
+	/**
+	 * \brief Script update function
+	 *
+	 * This function is called during the ScriptSystem::update() routine if the
+	 * \c BehaviorScript component holding this script instance is active.
+	 */
 	virtual void update() {}
 	// NOTE: additional *events* (like unity's OnDisable and OnEnable) should be implemented as
 	// member methods in derivative user script classes and registered in init(), otherwise this
 	// class will balloon in size with each added event.
 
 protected:
+	/**
+	 * \brief Get single component of type \c T on this game object (utility)
+	 *
+	 * \tparam T Type of component
+	 *
+	 * \returns Reference to component
+	 *
+	 * \throws nullptr if this game object does not have a component matching
+	 * type \c T
+	 */
 	template <typename T>
-	T & get_component();
+	T & get_component() const;
 
+	/**
+	 * \brief Get all components of type \c T on this game object (utility)
+	 *
+	 * \tparam T Type of component
+	 *
+	 * \returns List of component references
+	 */
 	template <typename T>
-	std::vector<std::reference_wrapper<T>> get_components();
+	std::vector<std::reference_wrapper<T>> get_components() const;
+
+protected:
+	// NOTE: Script must have a constructor without arguments so the game
+	// programmer doesn't need to manually add `using Script::Script` to their
+	// concrete script class.
+	Script() = default;
+	//! Only \c BehaviorScript instantiates Script
+	friend class BehaviorScript;
 
 private:
-	friend class crepe::BehaviorScript;
-	BehaviorScript * parent = nullptr;
+	// These references are set by BehaviorScript immediately after calling the
+	// constructor of Script.
+	BehaviorScript * parent_ref = nullptr;
+	ComponentManager * component_manager_ref = nullptr;
 };
 
 } // namespace crepe