split property & values into separate classes and files

Signed-off-by: Folling <mail@folling.io>

include/ikarus/objects/properties/property_source.h

@@ -0,0 +1,55 @@
+#pragma once
+
+/// \file property_source.h
+/// \author Folling <folling@ikarus.world>
+
+#include <ikarus/macros.h>
+
+/// \addtogroup properties Properties
+/// @{
+
+IKARUS_BEGIN_HEADER
+
+struct IkarusPropertySource;
+
+/// \brief Creates an blueprint property source.
+/// \param blueprint The blueprint to create the property source for.
+/// \pre \li Must not be null.
+/// \pre \li Must exist.
+/// \return The created property source or null if an error occurs.
+/// \remark Must be freed using #ikarus_free.
+IKA_API struct IkarusPropertySource * ikarus_property_source_create_blueprint(struct IkarusBlueprint * blueprint);
+
+/// \brief Creates an entity property source.
+/// \param entity The entity to create the property source for.
+/// \pre \li Must not be null.
+/// \pre \li Must exist.
+/// \return The created property source or null if an error occurs.
+/// \remark Must be freed using #ikarus_free.
+IKA_API struct IkarusPropertySource * ikarus_property_source_create_entity(struct IkarusEntity * entity);
+
+/// \brief Visits a property source, calling the appropriate callback.
+/// \param property_source The property source to visit.
+/// \pre \li Must not be null.
+/// \pre \li Must exist.
+/// \param blueprint_visitor The callback to call if the source is a blueprint, skipped if null.
+/// \param entity_visitor The callback to call if the source is an entity, skipped if null.
+/// \param user_data User data to pass to the callbacks.
+IKA_API void ikarus_property_source_visit(
+    struct IkarusPropertySource * property_source,
+    void (*blueprint_visitor)(struct IkarusBlueprint *, void *),
+    void (*entity_visitor)(struct IkarusEntity *, void *),
+    void * user_data
+);
+
+/// \see ikarus_property_source_visit
+IKA_API void ikarus_property_source_visit_const(
+    struct IkarusPropertySource const * property_source,
+    void (*blueprint_visitor)(struct IkarusBlueprint const *, void *),
+    void (*entity_visitor)(struct IkarusEntity const *, void *),
+    void * user_data
+);
+
+IKARUS_END_HEADER
+
+/// @}