From fb8e9ce4760baec3877f2363f409074d9091f8d0 Mon Sep 17 00:00:00 2001
From: visuve <veli-matti.visuri@iki.fi>
Date: Sun, 10 Mar 2024 18:40:10 +0200
Subject: [PATCH] Add time::time_to_midnight

---
 src/sykero_time.cpp | 6 ++++++
 src/sykero_time.hpp | 2 ++
 src/sykerolabs.cpp  | 7 ++-----
 3 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/src/sykero_time.cpp b/src/sykero_time.cpp
index 0482d82..0f33fda 100644
--- a/src/sykero_time.cpp
+++ b/src/sykero_time.cpp
@@ -35,6 +35,12 @@ namespace sl::time
 		return tm.tm_hour >= 22 || tm.tm_hour <= 8;
 	}
 
+	std::chrono::hh_mm_ss<std::chrono::nanoseconds> time_to_midnight(const std::chrono::system_clock::time_point& time_point)
+	{
+		std::chrono::nanoseconds nanos_to_midnight = time_point - std::chrono::floor<std::chrono::days>(time_point);
+		return std::chrono::hh_mm_ss<std::chrono::nanoseconds>(nanos_to_midnight);
+	}
+
 	template <size_t FS, size_t ES>
 	std::string to_string(
 		const std::chrono::system_clock::time_point& time_point,
diff --git a/src/sykero_time.hpp b/src/sykero_time.hpp
index 47ab46e..69a9947 100644
--- a/src/sykero_time.hpp
+++ b/src/sykero_time.hpp
@@ -6,6 +6,8 @@ namespace sl::time
 
 	bool is_night(const std::chrono::system_clock::time_point& time_point = std::chrono::system_clock::now());
 
+	std::chrono::hh_mm_ss<std::chrono::nanoseconds> time_to_midnight(const std::chrono::system_clock::time_point& time_point = std::chrono::system_clock::now());
+
 	std::string time_string(const std::chrono::system_clock::time_point& time_point = std::chrono::system_clock::now());
 	std::string date_string(const std::chrono::system_clock::time_point& time_point = std::chrono::system_clock::now());
 	std::string datetime_string(const std::chrono::system_clock::time_point& time_point = std::chrono::system_clock::now());
diff --git a/src/sykerolabs.cpp b/src/sykerolabs.cpp
index 9a3fc18..6312998 100644
--- a/src/sykerolabs.cpp
+++ b/src/sykerolabs.cpp
@@ -291,16 +291,13 @@ namespace sl
 			"CPU Temperature" 
 		});
 
-		auto rotate_csv = [&]()
+		const auto rotate_csv = [&]()
 		{
 			csv.initialize(csv_file_timestamped_path());
 		};
 
-		auto now = std::chrono::system_clock::now();
-		std::chrono::nanoseconds nanos_to_midnight = now - std::chrono::floor<std::chrono::days>(now);
-		std::chrono::hh_mm_ss<std::chrono::nanoseconds> first_start(nanos_to_midnight);
+		const std::chrono::hh_mm_ss first_start = time::time_to_midnight();
 		constexpr std::chrono::days interval(1);
-
 		time::timer csv_rotate_timer(rotate_csv, first_start, interval);
 
 		const std::set<uint32_t> water_level_sensor_pins =