From 3fc4f3ec8435f3a5b637fc306610dc365e9f2fa1 Mon Sep 17 00:00:00 2001
From: cat <cat@thenight.club>
Date: Fri, 30 Jan 2026 15:58:53 +0200
Subject: [PATCH] Added basics of the ECS world's life cycle

---
 headers/Systems/ECS.hpp      | 10 +++++++++-
 source/Systems/ECS/World.cpp | 20 ++++++++++++++++++++
 2 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/headers/Systems/ECS.hpp b/headers/Systems/ECS.hpp
index a450689..d2cf0ee 100644
--- a/headers/Systems/ECS.hpp
+++ b/headers/Systems/ECS.hpp
@@ -11,6 +11,7 @@
 #define GUARD_TOURMALINE_ECS_H
 #include <any>
 #include <format>
+#include <stack>
 #include <typeindex>
 
 #include "../Containers/DualkeyMap.hpp"
@@ -24,6 +25,9 @@ class World;
 
 class World {
 public:
+  // ====== World controls ======
+  void Step();
+
   // ========  Entities  ========
   [[nodiscard]]
   Entity CreateEntity();
@@ -75,9 +79,13 @@ private:
 
   // All of this is done so entities are not disabled during the
   // run of the systems
-  std::vector<std::pair<Components::Enabled *, bool>> entitiesToDisable;
+  std::stack<std::pair<Components::Enabled *, bool>> entitiesToDisable;
   // Oh here comes the jank
   friend void Components::Enabled::setEnabled(bool);
+
+  // ======== Life-cycle ========
+  void preSystems();
+  void postSystems();
 };
 } // namespace Tourmaline::Systems::ECS
 #endif
diff --git a/source/Systems/ECS/World.cpp b/source/Systems/ECS/World.cpp
index 70dd1a1..0abc649 100644
--- a/source/Systems/ECS/World.cpp
+++ b/source/Systems/ECS/World.cpp
@@ -15,6 +15,26 @@
 using namespace Tourmaline::Systems;
 using namespace ECS;
 
+void World::Step() {
+  preSystems();
+  // Actual systems will happen here
+  postSystems();
+}
+
+void World::preSystems() {
+  // Defined for future use
+}
+
+void World::postSystems() {
+  // Can't do a foreach with a std::stack
+  while (!entitiesToDisable.empty()) {
+    std::pair<Components::Enabled *, bool> &request = entitiesToDisable.top();
+    request.first->enabled = request.second;
+    entitiesToDisable.pop();
+  }
+}
+
+// Entities
 Entity World::CreateEntity() {
   auto newEntity = Random::GenerateUUID();