From b9694e8cc6b85a0089f97ff3c21862adc75a7ee5 Mon Sep 17 00:00:00 2001
From: Loek Le Blansch <loek@pipeframe.xyz>
Date: Wed, 11 Dec 2024 21:49:32 +0100
Subject: working proof of concept replay system

---
 src/crepe/system/ReplaySystem.cpp | 33 ++++++++++++++++++++-------------
 src/crepe/system/ReplaySystem.h   |  8 +++++++-
 2 files changed, 27 insertions(+), 14 deletions(-)

(limited to 'src/crepe/system')

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();
 };
-- 
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