From b1183c712d94d38f75068bd62df006f73bd3550f Mon Sep 17 00:00:00 2001
From: HampusM <hampus@hampusmat.com>
Date: Sun, 22 May 2022 21:32:16 +0200
Subject: feat: add update speed monitoring

---
 src/game/game.cpp           | 18 +++++++++++++++++-
 src/game/game.hpp           |  3 +++
 src/game/status_manager.cpp |  4 ++--
 3 files changed, 22 insertions(+), 3 deletions(-)

diff --git a/src/game/game.cpp b/src/game/game.cpp
index 18db133..b9f5e3a 100644
--- a/src/game/game.cpp
+++ b/src/game/game.cpp
@@ -7,6 +7,7 @@
 
 #include <fmt/core.h>
 
+#include <chrono>
 #include <iostream>
 #include <utility>
 
@@ -35,6 +36,7 @@ void Game::on_start() noexcept
 	_status_manager->set_section_title(StatusLineSection::C, "Y: ");
 	_status_manager->set_section_title(StatusLineSection::D, "Paused: ");
 	_status_manager->set_section_title(StatusLineSection::E, "Generation: ");
+	_status_manager->set_section_title(StatusLineSection::F, "Time since last frame: ");
 
 	std::shared_ptr<ISubscriber<Vector2>> vector2_statusline_subscriber_adapter =
 		_vector2_statusline_subscriber_adapter_factory(
@@ -66,9 +68,23 @@ void Game::on_start() noexcept
 		_generation_tracker->get_is_paused() ? "yes" : "no");
 
 	_status_manager->set_section_body(StatusLineSection::E, "0");
+
+	_status_manager->set_section_body(StatusLineSection::F, "0");
+
+	_last_update_time = std::chrono::system_clock::now();
 }
 
-void Game::on_update() noexcept {}
+void Game::on_update() noexcept
+{
+	const auto time_since_last_update =
+		std::chrono::system_clock::now() - _last_update_time;
+
+	_status_manager->set_section_body(
+		StatusLineSection::F,
+		fmt::format("{} nanoseconds", time_since_last_update.count()));
+
+	_last_update_time = std::chrono::system_clock::now();
+}
 
 void Game::on_exit() const noexcept
 {
diff --git a/src/game/game.hpp b/src/game/game.hpp
index 1546a9c..fb2ad63 100644
--- a/src/game/game.hpp
+++ b/src/game/game.hpp
@@ -7,6 +7,7 @@
 #include "interfaces/status_manager.hpp"
 #include "interfaces/statusline_subscriber_adapter.hpp"
 
+#include <chrono>
 #include <memory>
 
 class Game : public IGame
@@ -36,4 +37,6 @@ private:
 	std::shared_ptr<IStatusManager> _status_manager;
 	IStatusLineSubscriberAdapterFactory<Vector2>
 		_vector2_statusline_subscriber_adapter_factory;
+
+	std::chrono::system_clock::time_point _last_update_time;
 };
diff --git a/src/game/status_manager.cpp b/src/game/status_manager.cpp
index 1a709d3..33174d1 100644
--- a/src/game/status_manager.cpp
+++ b/src/game/status_manager.cpp
@@ -16,8 +16,8 @@ void StatusManager::initialize() noexcept
 	_statusline->set_section_length(StatusLineSection::B, 15U);
 	_statusline->set_section_length(StatusLineSection::C, 15U);
 	_statusline->set_section_length(StatusLineSection::D, 20U);
-	_statusline->set_section_length(StatusLineSection::E, 15U);
-	_statusline->set_section_length(StatusLineSection::F, 15U);
+	_statusline->set_section_length(StatusLineSection::E, 25U);
+	_statusline->set_section_length(StatusLineSection::F, 50U);
 
 	_statusline->initialize_background();
 }
-- 
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