working proof of concept replay system

4 files changed, 55 insertions, 14 deletions

diff --git a/src/crepe/manager/SystemManager.cpp b/src/crepe/manager/SystemManager.cpp
index 8fd80a7..db7430e 100644
--- a/src/crepe/manager/SystemManager.cpp
+++ b/src/crepe/manager/SystemManager.cpp
@@ -8,6 +8,7 @@
 #include "../system/RenderSystem.h"
 #include "../system/ScriptSystem.h"
 #include "../system/EventSystem.h"
+#include "../system/ReplaySystem.h"
 
 #include "SystemManager.h"
 
@@ -15,6 +16,7 @@ using namespace crepe;
 using namespace std;
 
 SystemManager::SystemManager(Mediator & mediator) : Manager(mediator) {
+	this->load_system<ReplaySystem>();
 	this->load_system<ScriptSystem>();
 	this->load_system<AISystem>();
 	this->load_system<PhysicsSystem>();
@@ -43,3 +45,23 @@ void SystemManager::frame_update() {
 	}
 }
 
+SystemManager::Snapshot SystemManager::save() {
+	Snapshot snapshot;
+	for (auto & [type, system] : this->systems) {
+		snapshot[type] = system->active;
+	}
+	return snapshot;
+}
+
+void SystemManager::restore(const Snapshot & snapshot) {
+	for (auto & [type, active] : snapshot) {
+		this->systems[type]->active = active;
+	}
+}
+
+void SystemManager::disable_all() {
+	for (auto & [type, system] : this->systems) {
+		system->active = false;
+	}
+}
+
diff --git a/src/crepe/manager/SystemManager.h b/src/crepe/manager/SystemManager.h
index 5726a5c..6cf7f2b 100644
--- a/src/crepe/manager/SystemManager.h
+++ b/src/crepe/manager/SystemManager.h
@@ -48,6 +48,12 @@ public:
 	 */
 	template <class T>
 	T & get_system();
+
+public:
+	typedef std::unordered_map<std::type_index, bool> Snapshot;
+	Snapshot save();
+	void restore(const Snapshot & snapshot);
+	void disable_all();
 };
 
 } // namespace crepe
diff --git a/src/crepe/system/ReplaySystem.cpp b/src/crepe/system/ReplaySystem.cpp
index 5a90752..a6b8fb1 100644
--- a/src/crepe/system/ReplaySystem.cpp
+++ b/src/crepe/system/ReplaySystem.cpp
@@ -1,8 +1,8 @@
-#include "ScriptSystem.h"
-
+#include "../util/Log.h"
 #include "../manager/ReplayManager.h"
 #include "../manager/SystemManager.h"
 
+#include "RenderSystem.h"
 #include "ReplaySystem.h"
 
 using namespace crepe;
@@ -45,6 +45,7 @@ void ReplaySystem::update_playing() {
 	ReplayManager::Recording & recording = replay.recording;
 
 	if (recording.frames.size() == recording.frame) {
+		dbg_log("Finished playback");
 		this->playback_end();
 		return;
 	}
@@ -52,27 +53,33 @@ void ReplaySystem::update_playing() {
 	ComponentManager & components = this->mediator.component_manager;
 	ComponentManager::Snapshot & frame = recording.frames.at(recording.frame);
 
+	dbg_logf("Playing recording frame {}", recording.frame);
 	components.restore(frame);
 	recording.frame++;
 }
 
 void ReplaySystem::playback_begin() {
 	SystemManager & systems = this->mediator.system_manager;
-	systems.get_system<ScriptSystem>().active = false;
-	// TODO: store system active state
-	// TODO: disable most systems
-	// TODO: store components snapshot
-}
+	ComponentManager & components = this->mediator.component_manager;
 
-void ReplaySystem::playback_end() {
-	ReplayManager & replay = this->mediator.replay_manager;
+	this->playback = {
+		.components = components.save(),
+		.systems = systems.save(),
+	};
 
-	replay.state = ReplayManager::IDLE;
+	systems.disable_all();
+	systems.get_system<RenderSystem>().active = true;
+	systems.get_system<ReplaySystem>().active = true;
+}
 
+void ReplaySystem::playback_end() {
 	SystemManager & systems = this->mediator.system_manager;
-	systems.get_system<ScriptSystem>().active = true;
+	ComponentManager & components = this->mediator.component_manager;
 
-	// TODO: restore system active state snapshot
-	// TODO: restore components snapshot
+	components.restore(this->playback.components);
+	systems.restore(this->playback.systems);
+
+	ReplayManager & replay = this->mediator.replay_manager;
+	replay.state = ReplayManager::IDLE;
 }
 
diff --git a/src/crepe/system/ReplaySystem.h b/src/crepe/system/ReplaySystem.h
index fb40176..6f6fce4 100644
--- a/src/crepe/system/ReplaySystem.h
+++ b/src/crepe/system/ReplaySystem.h
@@ -1,6 +1,7 @@
 #pragma once
 
 #include "../manager/ReplayManager.h"
+#include "../manager/SystemManager.h"
 
 #include "System.h"
 
@@ -17,7 +18,12 @@ private:
 	void update_recording();
 	void update_playing();
 
-	std::unordered_map<std::type_index, bool> system_active_snapshot;
+	struct Snapshot {
+		ComponentManager::Snapshot components;
+		SystemManager::Snapshot systems;
+	};
+	Snapshot playback;
+
 	void playback_begin();
 	void playback_end();
 };