2 files changed, 81 insertions, 0 deletions

diff --git a/src/crepe/system/ReplaySystem.cpp b/src/crepe/system/ReplaySystem.cpp
index 3aabb58..85595a2 100644
--- a/src/crepe/system/ReplaySystem.cpp
+++ b/src/crepe/system/ReplaySystem.cpp
@@ -1,7 +1,77 @@
+#include "system/ScriptSystem.h"
+
+#include "../manager/ReplayManager.h"
+
 #include "ReplaySystem.h"
 
+#include "../api/LoopManager.h"
+
 using namespace crepe;
+using namespace std;
 
 void ReplaySystem::fixed_update() {
+	ReplayManager & replay = this->mediator.replay_manager;
+
+	switch (replay.state) {
+		case ReplayManager::IDLE: break;
+		case ReplayManager::RECORDING: {
+			this->update_recording();
+			break;
+		}
+		case ReplayManager::PLAYING: {
+			this->update_playing();
+			break;
+		}
+	}
+
+	this->last_state = replay.state;
+}
+
+void ReplaySystem::update_recording() {
+	ReplayManager & replay = this->mediator.replay_manager;
+	ComponentManager & components = this->mediator.component_manager;
+
+	ReplayManager::Recording & recording = replay.recording;
+	recording.frames.push_back(components.save());
+	recording.frame++;
+}
+
+void ReplaySystem::update_playing() {
+	ReplayManager & replay = this->mediator.replay_manager;
+
+	if (this->last_state != ReplayManager::PLAYING) {
+		this->playback_begin();
+	}
+
+	ReplayManager::Recording & recording = replay.recording;
+
+	if (recording.frames.size() == recording.frame) {
+		this->playback_end();
+		return;
+	}
+
+	ComponentManager & components = this->mediator.component_manager;
+	ComponentManager::Snapshot & frame = recording.frames.at(recording.frame);
+
+	components.restore(frame);
+	recording.frame++;
+}
+
+void ReplaySystem::playback_begin() {
+	LoopManager & loop_manager = this->mediator.loop_manager;
+	// TODO: store system active state
+	// TODO: disable most systems
+	// TODO: store components snapshot
+}
+
+void ReplaySystem::playback_end() {
+	ReplayManager & replay = this->mediator.replay_manager;
+
+	replay.state = ReplayManager::IDLE;
+
+	LoopManager & loop_manager = this->mediator.loop_manager;
+
+	// TODO: restore system active state snapshot
+	// TODO: restore components snapshot
 }
 
diff --git a/src/crepe/system/ReplaySystem.h b/src/crepe/system/ReplaySystem.h
index 15ef3fc..fb40176 100644
--- a/src/crepe/system/ReplaySystem.h
+++ b/src/crepe/system/ReplaySystem.h
@@ -1,5 +1,7 @@
 #pragma once
 
+#include "../manager/ReplayManager.h"
+
 #include "System.h"
 
 namespace crepe {
@@ -9,6 +11,15 @@ public:
 	using System::System;
 
 	void fixed_update() override;
+
+private:
+	ReplayManager::State last_state = ReplayManager::IDLE;
+	void update_recording();
+	void update_playing();
+
+	std::unordered_map<std::type_index, bool> system_active_snapshot;
+	void playback_begin();
+	void playback_end();
 };
 
 }