Reduce frequency of sunset script runs

scripts/sunset.py

@@ -0,0 +1,55 @@
+#!/bin/env python
+"""Sets the monitor temperature based on the current time using Hyprsunset"""
+from datetime import datetime
+from os import environ
+from socket import AF_UNIX, SOCK_STREAM, socket
+
+
+type Range = tuple[float, float]
+
+
+def lerped_amount(x: float, edges: Range) -> float:
+	"""How far `x` is between `values`"""
+	return (x - edges[0]) / (edges[1] - edges[0])
+
+
+def smoothstep(x: float, edges: Range) -> float:
+	"""Smoothly interpolates between the `edges` based on `x`"""
+	# Technically I should bounds check but whatever
+	return (x * x * (3.0 - 2.0 * x)) * (edges[1] - edges[0]) + edges[0]
+
+
+def day_elapsed(hours: int = 0, minutes: int = 0, seconds: int = 0) -> float:
+	"""Converts (H, M, S) into [0, 1] representing how far through the day it is"""
+	return ((((hours * 60) + minutes) * 60) + seconds) / 86400
+
+
+def main(sunrise: Range, sunset: Range, temp_range: Range) -> None:
+	"""Adjusts the monitor temperature based on the current time"""
+	now = datetime.now()
+	elapsed = day_elapsed(now.hour, now.minute, now.second)
+
+	if elapsed <= sunrise[0]:
+		temperature = temp_range[0]
+	elif elapsed < sunrise[1]:
+		temperature = smoothstep(lerped_amount(elapsed, sunrise), temp_range)
+	elif elapsed <= sunset[0]:
+		temperature = temp_range[1]
+	elif elapsed < sunset[1]:
+		temperature = smoothstep(lerped_amount(elapsed, sunset), (temp_range[1], temp_range[0]))
+	else:
+		temperature = temp_range[0]
+
+	hyprsunset = socket(AF_UNIX, SOCK_STREAM)
+	# In theory I should use $XDG_RUNTIME_DIR, but for me it's always `/run/user/1000/`
+	hyprsunset.connect(f"/run/user/1000/hypr/{environ["HYPRLAND_INSTANCE_SIGNATURE"]}/.hyprsunset.sock")
+	# In theory the message might not send in one go, but in practice it does do I won't bother handling it
+	_ = hyprsunset.send(f"temperature {temperature:.1f}".encode())
+
+
+if __name__ == "__main__":
+	main(
+		(day_elapsed(5), day_elapsed(7)),
+		(day_elapsed(21), day_elapsed(23)),
+		(2500.0, 6000.0)
+	)

scripts/sunset.sh

@@ -1,65 +0,0 @@
-#!/bin/env sh
-
-SUNRISE_START="$((5 * 60 * 60))"  # When to start turning up temperature
-SUNRISE_END="$((7 * 60 * 60))"  # When to reach max temperature
-
-SUNSET_START="$((21 * 60 * 60))"  # When to start turning down temperature
-SUNSET_END="$((23 * 60 * 60))"  # When to reach min temperature
-
-DAY_TEMP="6000"  # Display temperature (K) to use in full daylight
-NIGHT_TEMP="2400"  # Display temperature (K) to use at night
-
-CURRENT="$(((($(date '+%-H') * 60) + $(date '+%-M')) * 60 + $(date '+%-S')))"  # Time in seconds since start of day
-
-# Performs a calculation using an argument containing an input string
-calc() {
-  echo "scale=4; $1" | bc
-}
-
-# Evaluates a boolean expression on an argument containing an input string
-bool() {
-  echo "scale=1; $1" | bc
-}
-
-# GLSL Smoothstep, takes a single number as an argument
-smoothstep() {
-  if [ "$(bool "$1 <= 0")" = "1" ]; then
-    echo 0
-  elif [ "$(bool "$1 >= 1")" = "1" ]; then
-    echo 1
-  else
-    calc "$1 * $1 * (3 - 2 * $1)"
-  fi
-}
-
-# Interpolates between the 4th and 5th arguments based on the value of the 2nd in relation to the 1st and 3rd
-interpolate() {
-  LOWER_IN="$1"
-  VALUE="$2"
-  UPPER_IN="$3"
-  LOWER_OUT="$4"
-  UPPER_OUT="$5"
-
-  if [ "$((VALUE <= LOWER_IN))" = "1" ]; then
-    echo "$LOWER_OUT"
-  elif [ "$((VALUE < UPPER_IN))" = "1" ]; then
-    calc "$LOWER_OUT + (($UPPER_OUT - $LOWER_OUT) * $(smoothstep "$(calc "($VALUE - $LOWER_IN) / ($UPPER_IN - $LOWER_IN)")"))"
-  else
-    echo "$UPPER_OUT"
-  fi
-}
-
-if [ "$((CURRENT <= SUNRISE_START))" = "1" ]; then
-  TEMP="$NIGHT_TEMP"
-elif [ "$((CURRENT < SUNRISE_END))" = "1" ]; then
-  TEMP="$(interpolate "$SUNRISE_START" "$CURRENT" "$SUNRISE_END" "$NIGHT_TEMP" "$DAY_TEMP")"
-elif [ "$((CURRENT <= SUNSET_START))" = "1" ]; then
-  TEMP="$DAY_TEMP"
-elif [ "$((CURRENT < SUNSET_END))" = "1" ]; then
-  TEMP="$(interpolate "$SUNSET_START" "$CURRENT" "$SUNSET_END" "$DAY_TEMP" "$NIGHT_TEMP")"
-else
-  TEMP="$NIGHT_TEMP"
-fi
-
-# TODO: Figure out a nice way to wait until Hyprland has properly started up before running this
-hyprctl hyprsunset temperature "$TEMP"

systemd/sunset.service

@@ -3,4 +3,4 @@ Description=Sets the monitor temperature based on the time of day
 
 [Service]
 Type=oneshot
-ExecStart=/home/mbradley/scripts/sunset.sh
+ExecStart=/bin/env python -O /home/mbradley/scripts/sunset.py

systemd/sunset.timer

@@ -4,7 +4,7 @@ After=graphical-session.target
 After=hyprsunset.service
 
 [Timer]
-OnCalendar=*-*-* *:*:00
+OnCalendar=*:0/5
 Persistent=true
 AccuracySec=5s