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-rw-r--r--src/crepe/manager/Mediator.h35
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diff --git a/src/crepe/manager/Mediator.h b/src/crepe/manager/Mediator.h
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+#pragma once
+
+#include "../util/OptionalRef.h"
+
+// TODO: remove these singletons:
+#include "EventManager.h"
+#include "SaveManager.h"
+
+namespace crepe {
+
+class ComponentManager;
+class SceneManager;
+class ResourceManager;
+
+/**
+ * Struct to pass references to classes that would otherwise need to be singletons down to
+ * other classes within the engine hierarchy. Made to prevent constant changes to subclasses to
+ * pass specific references through dependency injection. All references on this struct
+ * *should* be explicitly checked for availability as this struct does not guarantee anything.
+ *
+ * \note Dereferencing members of this struct should be deferred. If you are a user of this
+ * class, keep a reference to this mediator instead of just picking references from it when you
+ * receive an instance.
+ *
+ * \warning This class should never be directly accessible from the API
+ */
+struct Mediator {
+ OptionalRef<ComponentManager> component_manager;
+ OptionalRef<SceneManager> scene_manager;
+ OptionalRef<SaveManager> save_manager = SaveManager::get_instance();
+ OptionalRef<EventManager> event_manager = EventManager::get_instance();
+ OptionalRef<ResourceManager> resource_manager;
+};
+
+} // namespace crepe