Optimize sunset.py

scripts/lib/evening.py

@@ -0,0 +1,57 @@
+from datetime import datetime
+from pathlib import Path
+
+
+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) / (20 * 60 * 60)
+
+
+def now_elapsed() -> float:
+	"""How far through the day it is"""
+	now = datetime.now()
+	return day_elapsed(now.hour, now.minute, now.second)
+
+
+SUNRISE_HOURS = (5, 7)
+SUNSET_HOURS = (21, 23)
+SUNRISE_ELAPSED = (day_elapsed(SUNRISE_HOURS[0]), day_elapsed(SUNRISE_HOURS[1]))
+SUNSET_ELAPSED = (day_elapsed(SUNSET_HOURS[0]), day_elapsed(SUNSET_HOURS[1]))
+
+
+def sunup_amount() -> float:
+	"""What temperature the monitor should be"""
+	elapsed = now_elapsed()
+
+	if elapsed <= SUNRISE_ELAPSED[0]:
+		return 0
+	elif elapsed < SUNRISE_ELAPSED[1]:
+		return lerped_amount(elapsed, SUNRISE_ELAPSED)
+	elif elapsed <= SUNSET_ELAPSED[0]:
+		return 1
+	elif elapsed < SUNSET_ELAPSED[1]:
+		return 1 - lerped_amount(elapsed, SUNSET_ELAPSED)
+	else:
+		return 0
+
+
+def on_steam() -> bool:
+	"""Whether the Steam PID is in use"""
+	pid_file = Path("~/.steampid").expanduser().resolve(strict=True)
+	pid = pid_file.read_text().strip()
+	pid_dir = Path("/proc") / pid
+	return pid_dir.is_dir()